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;
852 TYPE_STUB_DECL (type) = decl;
857 /* Remember a local name for name-mangling purposes. */
860 push_local_name (tree decl)
865 timevar_push (TV_NAME_LOOKUP);
867 name = DECL_NAME (decl);
869 nelts = VEC_length (tree, local_names);
870 for (i = 0; i < nelts; i++)
872 t = VEC_index (tree, local_names, i);
873 if (DECL_NAME (t) == name)
875 if (!DECL_LANG_SPECIFIC (decl))
876 retrofit_lang_decl (decl);
877 DECL_LANG_SPECIFIC (decl)->u.base.u2sel = 1;
878 if (DECL_LANG_SPECIFIC (t))
879 DECL_DISCRIMINATOR (decl) = DECL_DISCRIMINATOR (t) + 1;
881 DECL_DISCRIMINATOR (decl) = 1;
883 VEC_replace (tree, local_names, i, decl);
884 timevar_pop (TV_NAME_LOOKUP);
889 VEC_safe_push (tree, gc, local_names, decl);
890 timevar_pop (TV_NAME_LOOKUP);
893 /* Subroutine of duplicate_decls: return truthvalue of whether
894 or not types of these decls match.
896 For C++, we must compare the parameter list so that `int' can match
897 `int&' in a parameter position, but `int&' is not confused with
901 decls_match (tree newdecl, tree olddecl)
905 if (newdecl == olddecl)
908 if (TREE_CODE (newdecl) != TREE_CODE (olddecl))
909 /* If the two DECLs are not even the same kind of thing, we're not
910 interested in their types. */
913 if (TREE_CODE (newdecl) == FUNCTION_DECL)
915 tree f1 = TREE_TYPE (newdecl);
916 tree f2 = TREE_TYPE (olddecl);
917 tree p1 = TYPE_ARG_TYPES (f1);
918 tree p2 = TYPE_ARG_TYPES (f2);
920 /* Specializations of different templates are different functions
921 even if they have the same type. */
922 tree t1 = (DECL_USE_TEMPLATE (newdecl)
923 ? DECL_TI_TEMPLATE (newdecl)
925 tree t2 = (DECL_USE_TEMPLATE (olddecl)
926 ? DECL_TI_TEMPLATE (olddecl)
931 if (CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl)
932 && ! (DECL_EXTERN_C_P (newdecl)
933 && DECL_EXTERN_C_P (olddecl)))
936 #ifdef NO_IMPLICIT_EXTERN_C
937 /* A new declaration doesn't match a built-in one unless it
938 is also extern "C". */
939 if (DECL_IS_BUILTIN (olddecl)
940 && DECL_EXTERN_C_P (olddecl) && !DECL_EXTERN_C_P (newdecl))
944 if (TREE_CODE (f1) != TREE_CODE (f2))
947 if (same_type_p (TREE_TYPE (f1), TREE_TYPE (f2)))
949 if (p2 == NULL_TREE && DECL_EXTERN_C_P (olddecl)
950 && (DECL_BUILT_IN (olddecl)
951 #ifndef NO_IMPLICIT_EXTERN_C
952 || (DECL_IN_SYSTEM_HEADER (newdecl) && !DECL_CLASS_SCOPE_P (newdecl))
953 || (DECL_IN_SYSTEM_HEADER (olddecl) && !DECL_CLASS_SCOPE_P (olddecl))
957 types_match = self_promoting_args_p (p1);
958 if (p1 == void_list_node)
959 TREE_TYPE (newdecl) = TREE_TYPE (olddecl);
961 #ifndef NO_IMPLICIT_EXTERN_C
962 else if (p1 == NULL_TREE
963 && (DECL_EXTERN_C_P (olddecl)
964 && DECL_IN_SYSTEM_HEADER (olddecl)
965 && !DECL_CLASS_SCOPE_P (olddecl))
966 && (DECL_EXTERN_C_P (newdecl)
967 && DECL_IN_SYSTEM_HEADER (newdecl)
968 && !DECL_CLASS_SCOPE_P (newdecl)))
970 types_match = self_promoting_args_p (p2);
971 TREE_TYPE (newdecl) = TREE_TYPE (olddecl);
975 types_match = compparms (p1, p2);
980 else if (TREE_CODE (newdecl) == TEMPLATE_DECL)
982 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl))
983 != TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)))
986 if (!comp_template_parms (DECL_TEMPLATE_PARMS (newdecl),
987 DECL_TEMPLATE_PARMS (olddecl)))
990 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
991 types_match = same_type_p (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl)),
992 TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl)));
994 types_match = decls_match (DECL_TEMPLATE_RESULT (olddecl),
995 DECL_TEMPLATE_RESULT (newdecl));
999 /* Need to check scope for variable declaration (VAR_DECL).
1000 For typedef (TYPE_DECL), scope is ignored. */
1001 if (TREE_CODE (newdecl) == VAR_DECL
1002 && CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl)
1004 Two declarations for an object with C language linkage
1005 with the same name (ignoring the namespace that qualify
1006 it) that appear in different namespace scopes refer to
1008 && !(DECL_EXTERN_C_P (olddecl) && DECL_EXTERN_C_P (newdecl)))
1011 if (TREE_TYPE (newdecl) == error_mark_node)
1012 types_match = TREE_TYPE (olddecl) == error_mark_node;
1013 else if (TREE_TYPE (olddecl) == NULL_TREE)
1014 types_match = TREE_TYPE (newdecl) == NULL_TREE;
1015 else if (TREE_TYPE (newdecl) == NULL_TREE)
1018 types_match = comptypes (TREE_TYPE (newdecl),
1019 TREE_TYPE (olddecl),
1020 COMPARE_REDECLARATION);
1026 /* If NEWDECL is `static' and an `extern' was seen previously,
1027 warn about it. OLDDECL is the previous declaration.
1029 Note that this does not apply to the C++ case of declaring
1030 a variable `extern const' and then later `const'.
1032 Don't complain about built-in functions, since they are beyond
1033 the user's control. */
1036 warn_extern_redeclared_static (tree newdecl, tree olddecl)
1040 if (TREE_CODE (newdecl) == TYPE_DECL
1041 || TREE_CODE (newdecl) == TEMPLATE_DECL
1042 || TREE_CODE (newdecl) == CONST_DECL
1043 || TREE_CODE (newdecl) == NAMESPACE_DECL)
1046 /* Don't get confused by static member functions; that's a different
1048 if (TREE_CODE (newdecl) == FUNCTION_DECL
1049 && DECL_STATIC_FUNCTION_P (newdecl))
1052 /* If the old declaration was `static', or the new one isn't, then
1053 then everything is OK. */
1054 if (DECL_THIS_STATIC (olddecl) || !DECL_THIS_STATIC (newdecl))
1057 /* It's OK to declare a builtin function as `static'. */
1058 if (TREE_CODE (olddecl) == FUNCTION_DECL
1059 && DECL_ARTIFICIAL (olddecl))
1062 name = DECL_ASSEMBLER_NAME (newdecl);
1063 permerror (input_location, "%qD was declared %<extern%> and later %<static%>", newdecl);
1064 permerror (input_location, "previous declaration of %q+D", olddecl);
1067 /* NEW_DECL is a redeclaration of OLD_DECL; both are functions or
1068 function templates. If their exception specifications do not
1069 match, issue a diagnostic. */
1072 check_redeclaration_exception_specification (tree new_decl,
1077 tree new_exceptions;
1078 tree old_exceptions;
1080 new_type = TREE_TYPE (new_decl);
1081 new_exceptions = TYPE_RAISES_EXCEPTIONS (new_type);
1082 old_type = TREE_TYPE (old_decl);
1083 old_exceptions = TYPE_RAISES_EXCEPTIONS (old_type);
1087 If any declaration of a function has an exception-specification,
1088 all declarations, including the definition and an explicit
1089 specialization, of that function shall have an
1090 exception-specification with the same set of type-ids. */
1091 if ((pedantic || ! DECL_IN_SYSTEM_HEADER (old_decl))
1092 && ! DECL_IS_BUILTIN (old_decl)
1094 && !comp_except_specs (new_exceptions, old_exceptions,
1097 error ("declaration of %qF throws different exceptions", new_decl);
1098 error ("from previous declaration %q+F", old_decl);
1102 #define GNU_INLINE_P(fn) (DECL_DECLARED_INLINE_P (fn) \
1103 && lookup_attribute ("gnu_inline", \
1104 DECL_ATTRIBUTES (fn)))
1106 /* If NEWDECL is a redeclaration of OLDDECL, merge the declarations.
1107 If the redeclaration is invalid, a diagnostic is issued, and the
1108 error_mark_node is returned. Otherwise, OLDDECL is returned.
1110 If NEWDECL is not a redeclaration of OLDDECL, NULL_TREE is
1113 NEWDECL_IS_FRIEND is true if NEWDECL was declared as a friend. */
1116 duplicate_decls (tree newdecl, tree olddecl, bool newdecl_is_friend)
1118 unsigned olddecl_uid = DECL_UID (olddecl);
1119 int olddecl_friend = 0, types_match = 0, hidden_friend = 0;
1120 int new_defines_function = 0;
1121 tree new_template_info;
1123 if (newdecl == olddecl)
1126 types_match = decls_match (newdecl, olddecl);
1128 /* If either the type of the new decl or the type of the old decl is an
1129 error_mark_node, then that implies that we have already issued an
1130 error (earlier) for some bogus type specification, and in that case,
1131 it is rather pointless to harass the user with yet more error message
1132 about the same declaration, so just pretend the types match here. */
1133 if (TREE_TYPE (newdecl) == error_mark_node
1134 || TREE_TYPE (olddecl) == error_mark_node)
1135 return error_mark_node;
1137 if (DECL_P (olddecl)
1138 && TREE_CODE (newdecl) == FUNCTION_DECL
1139 && TREE_CODE (olddecl) == FUNCTION_DECL
1140 && (DECL_UNINLINABLE (newdecl) || DECL_UNINLINABLE (olddecl)))
1142 if (DECL_DECLARED_INLINE_P (newdecl)
1143 && DECL_UNINLINABLE (newdecl)
1144 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl)))
1145 /* Already warned elsewhere. */;
1146 else if (DECL_DECLARED_INLINE_P (olddecl)
1147 && DECL_UNINLINABLE (olddecl)
1148 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl)))
1149 /* Already warned. */;
1150 else if (DECL_DECLARED_INLINE_P (newdecl)
1151 && DECL_UNINLINABLE (olddecl)
1152 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl)))
1154 warning (OPT_Wattributes, "function %q+D redeclared as inline",
1156 warning (OPT_Wattributes, "previous declaration of %q+D "
1157 "with attribute noinline", olddecl);
1159 else if (DECL_DECLARED_INLINE_P (olddecl)
1160 && DECL_UNINLINABLE (newdecl)
1161 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl)))
1163 warning (OPT_Wattributes, "function %q+D redeclared with "
1164 "attribute noinline", newdecl);
1165 warning (OPT_Wattributes, "previous declaration of %q+D was inline",
1170 /* Check for redeclaration and other discrepancies. */
1171 if (TREE_CODE (olddecl) == FUNCTION_DECL
1172 && DECL_ARTIFICIAL (olddecl))
1174 gcc_assert (!DECL_HIDDEN_FRIEND_P (olddecl));
1175 if (TREE_CODE (newdecl) != FUNCTION_DECL)
1177 /* Avoid warnings redeclaring built-ins which have not been
1178 explicitly declared. */
1179 if (DECL_ANTICIPATED (olddecl))
1182 /* If you declare a built-in or predefined function name as static,
1183 the old definition is overridden, but optionally warn this was a
1184 bad choice of name. */
1185 if (! TREE_PUBLIC (newdecl))
1187 warning (OPT_Wshadow, "shadowing %s function %q#D",
1188 DECL_BUILT_IN (olddecl) ? "built-in" : "library",
1190 /* Discard the old built-in function. */
1193 /* If the built-in is not ansi, then programs can override
1194 it even globally without an error. */
1195 else if (! DECL_BUILT_IN (olddecl))
1196 warning (0, "library function %q#D redeclared as non-function %q#D",
1200 error ("declaration of %q#D", newdecl);
1201 error ("conflicts with built-in declaration %q#D",
1206 else if (!types_match)
1208 /* Avoid warnings redeclaring built-ins which have not been
1209 explicitly declared. */
1210 if (DECL_ANTICIPATED (olddecl))
1212 /* Deal with fileptr_type_node. FILE type is not known
1213 at the time we create the builtins. */
1216 for (t1 = TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1217 t2 = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1219 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2))
1222 else if (TREE_VALUE (t2) == fileptr_type_node)
1224 tree t = TREE_VALUE (t1);
1226 if (TREE_CODE (t) == POINTER_TYPE
1227 && TYPE_NAME (TREE_TYPE (t))
1228 && DECL_NAME (TYPE_NAME (TREE_TYPE (t)))
1229 == get_identifier ("FILE")
1230 && compparms (TREE_CHAIN (t1), TREE_CHAIN (t2)))
1232 tree oldargs = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1234 TYPE_ARG_TYPES (TREE_TYPE (olddecl))
1235 = TYPE_ARG_TYPES (TREE_TYPE (newdecl));
1236 types_match = decls_match (newdecl, olddecl);
1238 return duplicate_decls (newdecl, olddecl,
1240 TYPE_ARG_TYPES (TREE_TYPE (olddecl)) = oldargs;
1243 else if (! same_type_p (TREE_VALUE (t1), TREE_VALUE (t2)))
1246 else if ((DECL_EXTERN_C_P (newdecl)
1247 && DECL_EXTERN_C_P (olddecl))
1248 || compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1249 TYPE_ARG_TYPES (TREE_TYPE (olddecl))))
1251 /* A near match; override the builtin. */
1253 if (TREE_PUBLIC (newdecl))
1255 warning (0, "new declaration %q#D", newdecl);
1256 warning (0, "ambiguates built-in declaration %q#D",
1260 warning (OPT_Wshadow, "shadowing %s function %q#D",
1261 DECL_BUILT_IN (olddecl) ? "built-in" : "library",
1265 /* Discard the old built-in function. */
1268 /* Replace the old RTL to avoid problems with inlining. */
1269 COPY_DECL_RTL (newdecl, olddecl);
1271 /* Even if the types match, prefer the new declarations type for
1272 built-ins which have not been explicitly declared, for
1273 exception lists, etc... */
1274 else if (DECL_ANTICIPATED (olddecl))
1276 tree type = TREE_TYPE (newdecl);
1277 tree attribs = (*targetm.merge_type_attributes)
1278 (TREE_TYPE (olddecl), type);
1280 type = cp_build_type_attribute_variant (type, attribs);
1281 TREE_TYPE (newdecl) = TREE_TYPE (olddecl) = type;
1284 /* If a function is explicitly declared "throw ()", propagate that to
1285 the corresponding builtin. */
1286 if (DECL_BUILT_IN_CLASS (olddecl) == BUILT_IN_NORMAL
1287 && DECL_ANTICIPATED (olddecl)
1288 && TREE_NOTHROW (newdecl)
1289 && !TREE_NOTHROW (olddecl)
1290 && built_in_decls [DECL_FUNCTION_CODE (olddecl)] != NULL_TREE
1291 && built_in_decls [DECL_FUNCTION_CODE (olddecl)] != olddecl
1293 TREE_NOTHROW (built_in_decls [DECL_FUNCTION_CODE (olddecl)]) = 1;
1295 /* Whether or not the builtin can throw exceptions has no
1296 bearing on this declarator. */
1297 TREE_NOTHROW (olddecl) = 0;
1299 if (DECL_THIS_STATIC (newdecl) && !DECL_THIS_STATIC (olddecl))
1301 /* If a builtin function is redeclared as `static', merge
1302 the declarations, but make the original one static. */
1303 DECL_THIS_STATIC (olddecl) = 1;
1304 TREE_PUBLIC (olddecl) = 0;
1306 /* Make the old declaration consistent with the new one so
1307 that all remnants of the builtin-ness of this function
1308 will be banished. */
1309 SET_DECL_LANGUAGE (olddecl, DECL_LANGUAGE (newdecl));
1310 COPY_DECL_RTL (newdecl, olddecl);
1313 else if (TREE_CODE (olddecl) != TREE_CODE (newdecl))
1315 /* C++ Standard, 3.3, clause 4:
1316 "[Note: a namespace name or a class template name must be unique
1317 in its declarative region (7.3.2, clause 14). ]" */
1318 if (TREE_CODE (olddecl) != NAMESPACE_DECL
1319 && TREE_CODE (newdecl) != NAMESPACE_DECL
1320 && (TREE_CODE (olddecl) != TEMPLATE_DECL
1321 || TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) != TYPE_DECL)
1322 && (TREE_CODE (newdecl) != TEMPLATE_DECL
1323 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) != TYPE_DECL))
1325 if ((TREE_CODE (olddecl) == TYPE_DECL && DECL_ARTIFICIAL (olddecl)
1326 && TREE_CODE (newdecl) != TYPE_DECL)
1327 || (TREE_CODE (newdecl) == TYPE_DECL && DECL_ARTIFICIAL (newdecl)
1328 && TREE_CODE (olddecl) != TYPE_DECL))
1330 /* We do nothing special here, because C++ does such nasty
1331 things with TYPE_DECLs. Instead, just let the TYPE_DECL
1332 get shadowed, and know that if we need to find a TYPE_DECL
1333 for a given name, we can look in the IDENTIFIER_TYPE_VALUE
1334 slot of the identifier. */
1338 if ((TREE_CODE (newdecl) == FUNCTION_DECL
1339 && DECL_FUNCTION_TEMPLATE_P (olddecl))
1340 || (TREE_CODE (olddecl) == FUNCTION_DECL
1341 && DECL_FUNCTION_TEMPLATE_P (newdecl)))
1345 error ("%q#D redeclared as different kind of symbol", newdecl);
1346 if (TREE_CODE (olddecl) == TREE_LIST)
1347 olddecl = TREE_VALUE (olddecl);
1348 error ("previous declaration of %q+#D", olddecl);
1350 return error_mark_node;
1352 else if (!types_match)
1354 if (CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl))
1355 /* These are certainly not duplicate declarations; they're
1356 from different scopes. */
1359 if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1361 /* The name of a class template may not be declared to refer to
1362 any other template, class, function, object, namespace, value,
1363 or type in the same scope. */
1364 if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) == TYPE_DECL
1365 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
1367 error ("declaration of template %q#D", newdecl);
1368 error ("conflicts with previous declaration %q+#D", olddecl);
1370 else if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) == FUNCTION_DECL
1371 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == FUNCTION_DECL
1372 && compparms (TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl))),
1373 TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl))))
1374 && comp_template_parms (DECL_TEMPLATE_PARMS (newdecl),
1375 DECL_TEMPLATE_PARMS (olddecl))
1376 /* Template functions can be disambiguated by
1378 && same_type_p (TREE_TYPE (TREE_TYPE (newdecl)),
1379 TREE_TYPE (TREE_TYPE (olddecl))))
1381 error ("new declaration %q#D", newdecl);
1382 error ("ambiguates old declaration %q+#D", olddecl);
1386 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1388 if (DECL_EXTERN_C_P (newdecl) && DECL_EXTERN_C_P (olddecl))
1390 error ("declaration of C function %q#D conflicts with",
1392 error ("previous declaration %q+#D here", olddecl);
1394 else if (compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1395 TYPE_ARG_TYPES (TREE_TYPE (olddecl))))
1397 error ("new declaration %q#D", newdecl);
1398 error ("ambiguates old declaration %q+#D", olddecl);
1399 return error_mark_node;
1406 error ("conflicting declaration %q#D", newdecl);
1407 error ("%q+D has a previous declaration as %q#D", olddecl, olddecl);
1408 return error_mark_node;
1411 else if (TREE_CODE (newdecl) == FUNCTION_DECL
1412 && ((DECL_TEMPLATE_SPECIALIZATION (olddecl)
1413 && (!DECL_TEMPLATE_INFO (newdecl)
1414 || (DECL_TI_TEMPLATE (newdecl)
1415 != DECL_TI_TEMPLATE (olddecl))))
1416 || (DECL_TEMPLATE_SPECIALIZATION (newdecl)
1417 && (!DECL_TEMPLATE_INFO (olddecl)
1418 || (DECL_TI_TEMPLATE (olddecl)
1419 != DECL_TI_TEMPLATE (newdecl))))))
1420 /* It's OK to have a template specialization and a non-template
1421 with the same type, or to have specializations of two
1422 different templates with the same type. Note that if one is a
1423 specialization, and the other is an instantiation of the same
1424 template, that we do not exit at this point. That situation
1425 can occur if we instantiate a template class, and then
1426 specialize one of its methods. This situation is valid, but
1427 the declarations must be merged in the usual way. */
1429 else if (TREE_CODE (newdecl) == FUNCTION_DECL
1430 && ((DECL_TEMPLATE_INSTANTIATION (olddecl)
1431 && !DECL_USE_TEMPLATE (newdecl))
1432 || (DECL_TEMPLATE_INSTANTIATION (newdecl)
1433 && !DECL_USE_TEMPLATE (olddecl))))
1434 /* One of the declarations is a template instantiation, and the
1435 other is not a template at all. That's OK. */
1437 else if (TREE_CODE (newdecl) == NAMESPACE_DECL)
1439 /* In [namespace.alias] we have:
1441 In a declarative region, a namespace-alias-definition can be
1442 used to redefine a namespace-alias declared in that declarative
1443 region to refer only to the namespace to which it already
1446 Therefore, if we encounter a second alias directive for the same
1447 alias, we can just ignore the second directive. */
1448 if (DECL_NAMESPACE_ALIAS (newdecl)
1449 && (DECL_NAMESPACE_ALIAS (newdecl)
1450 == DECL_NAMESPACE_ALIAS (olddecl)))
1452 /* [namespace.alias]
1454 A namespace-name or namespace-alias shall not be declared as
1455 the name of any other entity in the same declarative region.
1456 A namespace-name defined at global scope shall not be
1457 declared as the name of any other entity in any global scope
1459 error ("declaration of namespace %qD conflicts with", newdecl);
1460 error ("previous declaration of namespace %q+D here", olddecl);
1461 return error_mark_node;
1465 const char *errmsg = redeclaration_error_message (newdecl, olddecl);
1468 error_at (DECL_SOURCE_LOCATION (newdecl), errmsg, newdecl);
1469 if (DECL_NAME (olddecl) != NULL_TREE)
1470 error ((DECL_INITIAL (olddecl) && namespace_bindings_p ())
1471 ? "%q+#D previously defined here"
1472 : "%q+#D previously declared here", olddecl);
1473 return error_mark_node;
1475 else if (TREE_CODE (olddecl) == FUNCTION_DECL
1476 && DECL_INITIAL (olddecl) != NULL_TREE
1477 && TYPE_ARG_TYPES (TREE_TYPE (olddecl)) == NULL_TREE
1478 && TYPE_ARG_TYPES (TREE_TYPE (newdecl)) != NULL_TREE)
1480 /* Prototype decl follows defn w/o prototype. */
1481 warning_at (input_location, 0, "prototype for %q+#D", newdecl);
1482 warning_at (DECL_SOURCE_LOCATION (olddecl), 0,
1483 "follows non-prototype definition here");
1485 else if ((TREE_CODE (olddecl) == FUNCTION_DECL
1486 || TREE_CODE (olddecl) == VAR_DECL)
1487 && DECL_LANGUAGE (newdecl) != DECL_LANGUAGE (olddecl))
1490 If two declarations of the same function or object
1491 specify different linkage-specifications ..., the program
1492 is ill-formed.... Except for functions with C++ linkage,
1493 a function declaration without a linkage specification
1494 shall not precede the first linkage specification for
1495 that function. A function can be declared without a
1496 linkage specification after an explicit linkage
1497 specification has been seen; the linkage explicitly
1498 specified in the earlier declaration is not affected by
1499 such a function declaration.
1501 DR 563 raises the question why the restrictions on
1502 functions should not also apply to objects. Older
1503 versions of G++ silently ignore the linkage-specification
1511 which is clearly wrong. Therefore, we now treat objects
1513 if (current_lang_depth () == 0)
1515 /* There is no explicit linkage-specification, so we use
1516 the linkage from the previous declaration. */
1517 if (!DECL_LANG_SPECIFIC (newdecl))
1518 retrofit_lang_decl (newdecl);
1519 SET_DECL_LANGUAGE (newdecl, DECL_LANGUAGE (olddecl));
1523 error ("previous declaration of %q+#D with %qL linkage",
1524 olddecl, DECL_LANGUAGE (olddecl));
1525 error ("conflicts with new declaration with %qL linkage",
1526 DECL_LANGUAGE (newdecl));
1530 if (DECL_LANG_SPECIFIC (olddecl) && DECL_USE_TEMPLATE (olddecl))
1532 else if (TREE_CODE (olddecl) == FUNCTION_DECL)
1534 tree t1 = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1535 tree t2 = TYPE_ARG_TYPES (TREE_TYPE (newdecl));
1538 if (TREE_CODE (TREE_TYPE (newdecl)) == METHOD_TYPE)
1539 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2);
1541 for (; t1 && t1 != void_list_node;
1542 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2), i++)
1543 if (TREE_PURPOSE (t1) && TREE_PURPOSE (t2))
1545 if (1 == simple_cst_equal (TREE_PURPOSE (t1),
1548 permerror (input_location, "default argument given for parameter %d of %q#D",
1550 permerror (input_location, "after previous specification in %q+#D", olddecl);
1554 error ("default argument given for parameter %d of %q#D",
1556 error ("after previous specification in %q+#D",
1563 /* Do not merge an implicit typedef with an explicit one. In:
1567 typedef class A A __attribute__ ((foo));
1569 the attribute should apply only to the typedef. */
1570 if (TREE_CODE (olddecl) == TYPE_DECL
1571 && (DECL_IMPLICIT_TYPEDEF_P (olddecl)
1572 || DECL_IMPLICIT_TYPEDEF_P (newdecl)))
1575 /* If new decl is `static' and an `extern' was seen previously,
1577 warn_extern_redeclared_static (newdecl, olddecl);
1579 /* We have committed to returning 1 at this point. */
1580 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1582 /* Now that functions must hold information normally held
1583 by field decls, there is extra work to do so that
1584 declaration information does not get destroyed during
1586 if (DECL_VINDEX (olddecl))
1587 DECL_VINDEX (newdecl) = DECL_VINDEX (olddecl);
1588 if (DECL_CONTEXT (olddecl))
1589 DECL_CONTEXT (newdecl) = DECL_CONTEXT (olddecl);
1590 DECL_STATIC_CONSTRUCTOR (newdecl) |= DECL_STATIC_CONSTRUCTOR (olddecl);
1591 DECL_STATIC_DESTRUCTOR (newdecl) |= DECL_STATIC_DESTRUCTOR (olddecl);
1592 DECL_PURE_VIRTUAL_P (newdecl) |= DECL_PURE_VIRTUAL_P (olddecl);
1593 DECL_VIRTUAL_P (newdecl) |= DECL_VIRTUAL_P (olddecl);
1594 DECL_INVALID_OVERRIDER_P (newdecl) |= DECL_INVALID_OVERRIDER_P (olddecl);
1595 DECL_THIS_STATIC (newdecl) |= DECL_THIS_STATIC (olddecl);
1596 if (DECL_OVERLOADED_OPERATOR_P (olddecl) != ERROR_MARK)
1597 SET_OVERLOADED_OPERATOR_CODE
1598 (newdecl, DECL_OVERLOADED_OPERATOR_P (olddecl));
1599 new_defines_function = DECL_INITIAL (newdecl) != NULL_TREE;
1601 /* Optionally warn about more than one declaration for the same
1602 name, but don't warn about a function declaration followed by a
1604 if (warn_redundant_decls && ! DECL_ARTIFICIAL (olddecl)
1605 && !(new_defines_function && DECL_INITIAL (olddecl) == NULL_TREE)
1606 /* Don't warn about extern decl followed by definition. */
1607 && !(DECL_EXTERNAL (olddecl) && ! DECL_EXTERNAL (newdecl))
1608 /* Don't warn about friends, let add_friend take care of it. */
1609 && ! (newdecl_is_friend || DECL_FRIEND_P (olddecl)))
1611 warning (OPT_Wredundant_decls, "redundant redeclaration of %qD in same scope", newdecl);
1612 warning (OPT_Wredundant_decls, "previous declaration of %q+D", olddecl);
1615 if (DECL_DELETED_FN (newdecl))
1617 error ("deleted definition of %qD", newdecl);
1618 error ("after previous declaration %q+D", olddecl);
1622 /* Deal with C++: must preserve virtual function table size. */
1623 if (TREE_CODE (olddecl) == TYPE_DECL)
1625 tree newtype = TREE_TYPE (newdecl);
1626 tree oldtype = TREE_TYPE (olddecl);
1628 if (newtype != error_mark_node && oldtype != error_mark_node
1629 && TYPE_LANG_SPECIFIC (newtype) && TYPE_LANG_SPECIFIC (oldtype))
1630 CLASSTYPE_FRIEND_CLASSES (newtype)
1631 = CLASSTYPE_FRIEND_CLASSES (oldtype);
1633 DECL_ORIGINAL_TYPE (newdecl) = DECL_ORIGINAL_TYPE (olddecl);
1636 /* Copy all the DECL_... slots specified in the new decl
1637 except for any that we copy here from the old type. */
1638 DECL_ATTRIBUTES (newdecl)
1639 = (*targetm.merge_decl_attributes) (olddecl, newdecl);
1641 if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1645 old_result = DECL_TEMPLATE_RESULT (olddecl);
1646 new_result = DECL_TEMPLATE_RESULT (newdecl);
1647 TREE_TYPE (olddecl) = TREE_TYPE (old_result);
1648 DECL_TEMPLATE_SPECIALIZATIONS (olddecl)
1649 = chainon (DECL_TEMPLATE_SPECIALIZATIONS (olddecl),
1650 DECL_TEMPLATE_SPECIALIZATIONS (newdecl));
1652 DECL_ATTRIBUTES (old_result)
1653 = (*targetm.merge_decl_attributes) (old_result, new_result);
1655 if (DECL_FUNCTION_TEMPLATE_P (newdecl))
1657 if (GNU_INLINE_P (old_result) != GNU_INLINE_P (new_result)
1658 && DECL_INITIAL (new_result))
1660 if (DECL_INITIAL (old_result))
1661 DECL_UNINLINABLE (old_result) = 1;
1663 DECL_UNINLINABLE (old_result) = DECL_UNINLINABLE (new_result);
1664 DECL_EXTERNAL (old_result) = DECL_EXTERNAL (new_result);
1665 DECL_NOT_REALLY_EXTERN (old_result)
1666 = DECL_NOT_REALLY_EXTERN (new_result);
1667 DECL_INTERFACE_KNOWN (old_result)
1668 = DECL_INTERFACE_KNOWN (new_result);
1669 DECL_DECLARED_INLINE_P (old_result)
1670 = DECL_DECLARED_INLINE_P (new_result);
1671 DECL_DISREGARD_INLINE_LIMITS (old_result)
1672 |= DECL_DISREGARD_INLINE_LIMITS (new_result);
1677 DECL_DECLARED_INLINE_P (old_result)
1678 |= DECL_DECLARED_INLINE_P (new_result);
1679 DECL_DISREGARD_INLINE_LIMITS (old_result)
1680 |= DECL_DISREGARD_INLINE_LIMITS (new_result);
1681 check_redeclaration_exception_specification (newdecl, olddecl);
1685 /* If the new declaration is a definition, update the file and
1686 line information on the declaration, and also make
1687 the old declaration the same definition. */
1688 if (DECL_INITIAL (new_result) != NULL_TREE)
1690 DECL_SOURCE_LOCATION (olddecl)
1691 = DECL_SOURCE_LOCATION (old_result)
1692 = DECL_SOURCE_LOCATION (newdecl);
1693 DECL_INITIAL (old_result) = DECL_INITIAL (new_result);
1694 if (DECL_FUNCTION_TEMPLATE_P (newdecl))
1697 DECL_ARGUMENTS (old_result)
1698 = DECL_ARGUMENTS (new_result);
1699 for (parm = DECL_ARGUMENTS (old_result); parm;
1700 parm = TREE_CHAIN (parm))
1701 DECL_CONTEXT (parm) = old_result;
1710 /* Automatically handles default parameters. */
1711 tree oldtype = TREE_TYPE (olddecl);
1714 /* Merge the data types specified in the two decls. */
1715 newtype = merge_types (TREE_TYPE (newdecl), TREE_TYPE (olddecl));
1717 /* If merge_types produces a non-typedef type, just use the old type. */
1718 if (TREE_CODE (newdecl) == TYPE_DECL
1719 && newtype == DECL_ORIGINAL_TYPE (newdecl))
1722 if (TREE_CODE (newdecl) == VAR_DECL)
1724 DECL_THIS_EXTERN (newdecl) |= DECL_THIS_EXTERN (olddecl);
1725 DECL_INITIALIZED_P (newdecl) |= DECL_INITIALIZED_P (olddecl);
1726 DECL_NONTRIVIALLY_INITIALIZED_P (newdecl)
1727 |= DECL_NONTRIVIALLY_INITIALIZED_P (olddecl);
1728 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (newdecl)
1729 |= DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (olddecl);
1731 /* Merge the threadprivate attribute from OLDDECL into NEWDECL. */
1732 if (DECL_LANG_SPECIFIC (olddecl)
1733 && CP_DECL_THREADPRIVATE_P (olddecl))
1735 /* Allocate a LANG_SPECIFIC structure for NEWDECL, if needed. */
1736 if (!DECL_LANG_SPECIFIC (newdecl))
1737 retrofit_lang_decl (newdecl);
1739 DECL_TLS_MODEL (newdecl) = DECL_TLS_MODEL (olddecl);
1740 CP_DECL_THREADPRIVATE_P (newdecl) = 1;
1744 /* Do this after calling `merge_types' so that default
1745 parameters don't confuse us. */
1746 else if (TREE_CODE (newdecl) == FUNCTION_DECL)
1747 check_redeclaration_exception_specification (newdecl, olddecl);
1748 TREE_TYPE (newdecl) = TREE_TYPE (olddecl) = newtype;
1750 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1751 check_default_args (newdecl);
1753 /* Lay the type out, unless already done. */
1754 if (! same_type_p (newtype, oldtype)
1755 && TREE_TYPE (newdecl) != error_mark_node
1756 && !(processing_template_decl && uses_template_parms (newdecl)))
1757 layout_type (TREE_TYPE (newdecl));
1759 if ((TREE_CODE (newdecl) == VAR_DECL
1760 || TREE_CODE (newdecl) == PARM_DECL
1761 || TREE_CODE (newdecl) == RESULT_DECL
1762 || TREE_CODE (newdecl) == FIELD_DECL
1763 || TREE_CODE (newdecl) == TYPE_DECL)
1764 && !(processing_template_decl && uses_template_parms (newdecl)))
1765 layout_decl (newdecl, 0);
1767 /* Merge the type qualifiers. */
1768 if (TREE_READONLY (newdecl))
1769 TREE_READONLY (olddecl) = 1;
1770 if (TREE_THIS_VOLATILE (newdecl))
1771 TREE_THIS_VOLATILE (olddecl) = 1;
1772 if (TREE_NOTHROW (newdecl))
1773 TREE_NOTHROW (olddecl) = 1;
1775 /* Merge deprecatedness. */
1776 if (TREE_DEPRECATED (newdecl))
1777 TREE_DEPRECATED (olddecl) = 1;
1779 /* Preserve function specific target and optimization options */
1780 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1782 if (DECL_FUNCTION_SPECIFIC_TARGET (olddecl)
1783 && !DECL_FUNCTION_SPECIFIC_TARGET (newdecl))
1784 DECL_FUNCTION_SPECIFIC_TARGET (newdecl)
1785 = DECL_FUNCTION_SPECIFIC_TARGET (olddecl);
1787 if (DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl)
1788 && !DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl))
1789 DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl)
1790 = DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl);
1793 /* Merge the initialization information. */
1794 if (DECL_INITIAL (newdecl) == NULL_TREE
1795 && DECL_INITIAL (olddecl) != NULL_TREE)
1797 DECL_INITIAL (newdecl) = DECL_INITIAL (olddecl);
1798 DECL_SOURCE_LOCATION (newdecl) = DECL_SOURCE_LOCATION (olddecl);
1799 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1801 DECL_SAVED_TREE (newdecl) = DECL_SAVED_TREE (olddecl);
1802 DECL_STRUCT_FUNCTION (newdecl) = DECL_STRUCT_FUNCTION (olddecl);
1806 /* Merge the section attribute.
1807 We want to issue an error if the sections conflict but that must be
1808 done later in decl_attributes since we are called before attributes
1810 if (DECL_SECTION_NAME (newdecl) == NULL_TREE)
1811 DECL_SECTION_NAME (newdecl) = DECL_SECTION_NAME (olddecl);
1813 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1815 DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (newdecl)
1816 |= DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (olddecl);
1817 DECL_NO_LIMIT_STACK (newdecl) |= DECL_NO_LIMIT_STACK (olddecl);
1818 TREE_THIS_VOLATILE (newdecl) |= TREE_THIS_VOLATILE (olddecl);
1819 TREE_NOTHROW (newdecl) |= TREE_NOTHROW (olddecl);
1820 DECL_IS_MALLOC (newdecl) |= DECL_IS_MALLOC (olddecl);
1821 DECL_IS_OPERATOR_NEW (newdecl) |= DECL_IS_OPERATOR_NEW (olddecl);
1822 DECL_PURE_P (newdecl) |= DECL_PURE_P (olddecl);
1823 TREE_READONLY (newdecl) |= TREE_READONLY (olddecl);
1824 DECL_LOOPING_CONST_OR_PURE_P (newdecl)
1825 |= DECL_LOOPING_CONST_OR_PURE_P (olddecl);
1826 /* Keep the old RTL. */
1827 COPY_DECL_RTL (olddecl, newdecl);
1829 else if (TREE_CODE (newdecl) == VAR_DECL
1830 && (DECL_SIZE (olddecl) || !DECL_SIZE (newdecl)))
1832 /* Keep the old RTL. We cannot keep the old RTL if the old
1833 declaration was for an incomplete object and the new
1834 declaration is not since many attributes of the RTL will
1836 COPY_DECL_RTL (olddecl, newdecl);
1839 /* If cannot merge, then use the new type and qualifiers,
1840 and don't preserve the old rtl. */
1843 /* Clean out any memory we had of the old declaration. */
1844 tree oldstatic = value_member (olddecl, static_aggregates);
1846 TREE_VALUE (oldstatic) = error_mark_node;
1848 TREE_TYPE (olddecl) = TREE_TYPE (newdecl);
1849 TREE_READONLY (olddecl) = TREE_READONLY (newdecl);
1850 TREE_THIS_VOLATILE (olddecl) = TREE_THIS_VOLATILE (newdecl);
1851 TREE_SIDE_EFFECTS (olddecl) = TREE_SIDE_EFFECTS (newdecl);
1854 /* Merge the storage class information. */
1855 merge_weak (newdecl, olddecl);
1857 if (DECL_ONE_ONLY (olddecl))
1858 DECL_COMDAT_GROUP (newdecl) = DECL_COMDAT_GROUP (olddecl);
1860 DECL_DEFER_OUTPUT (newdecl) |= DECL_DEFER_OUTPUT (olddecl);
1861 TREE_PUBLIC (newdecl) = TREE_PUBLIC (olddecl);
1862 TREE_STATIC (olddecl) = TREE_STATIC (newdecl) |= TREE_STATIC (olddecl);
1863 if (! DECL_EXTERNAL (olddecl))
1864 DECL_EXTERNAL (newdecl) = 0;
1866 new_template_info = NULL_TREE;
1867 if (DECL_LANG_SPECIFIC (newdecl) && DECL_LANG_SPECIFIC (olddecl))
1869 bool new_redefines_gnu_inline = false;
1871 if (new_defines_function
1872 && ((DECL_INTERFACE_KNOWN (olddecl)
1873 && TREE_CODE (olddecl) == FUNCTION_DECL)
1874 || (TREE_CODE (olddecl) == TEMPLATE_DECL
1875 && (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl))
1876 == FUNCTION_DECL))))
1880 if (TREE_CODE (fn) == TEMPLATE_DECL)
1881 fn = DECL_TEMPLATE_RESULT (olddecl);
1883 new_redefines_gnu_inline = GNU_INLINE_P (fn) && DECL_INITIAL (fn);
1886 if (!new_redefines_gnu_inline)
1888 DECL_INTERFACE_KNOWN (newdecl) |= DECL_INTERFACE_KNOWN (olddecl);
1889 DECL_NOT_REALLY_EXTERN (newdecl) |= DECL_NOT_REALLY_EXTERN (olddecl);
1890 DECL_COMDAT (newdecl) |= DECL_COMDAT (olddecl);
1892 DECL_TEMPLATE_INSTANTIATED (newdecl)
1893 |= DECL_TEMPLATE_INSTANTIATED (olddecl);
1894 DECL_ODR_USED (newdecl) |= DECL_ODR_USED (olddecl);
1896 /* If the OLDDECL is an instantiation and/or specialization,
1897 then the NEWDECL must be too. But, it may not yet be marked
1898 as such if the caller has created NEWDECL, but has not yet
1899 figured out that it is a redeclaration. */
1900 if (!DECL_USE_TEMPLATE (newdecl))
1901 DECL_USE_TEMPLATE (newdecl) = DECL_USE_TEMPLATE (olddecl);
1903 /* Don't really know how much of the language-specific
1904 values we should copy from old to new. */
1905 DECL_IN_AGGR_P (newdecl) = DECL_IN_AGGR_P (olddecl);
1906 DECL_REPO_AVAILABLE_P (newdecl) = DECL_REPO_AVAILABLE_P (olddecl);
1907 DECL_INITIALIZED_IN_CLASS_P (newdecl)
1908 |= DECL_INITIALIZED_IN_CLASS_P (olddecl);
1910 if (LANG_DECL_HAS_MIN (newdecl))
1912 DECL_LANG_SPECIFIC (newdecl)->u.min.u2 =
1913 DECL_LANG_SPECIFIC (olddecl)->u.min.u2;
1914 if (DECL_TEMPLATE_INFO (newdecl))
1915 new_template_info = DECL_TEMPLATE_INFO (newdecl);
1916 DECL_TEMPLATE_INFO (newdecl) = DECL_TEMPLATE_INFO (olddecl);
1918 /* Only functions have these fields. */
1919 if (TREE_CODE (newdecl) == FUNCTION_DECL
1920 || DECL_FUNCTION_TEMPLATE_P (newdecl))
1922 DECL_NONCONVERTING_P (newdecl) = DECL_NONCONVERTING_P (olddecl);
1923 olddecl_friend = DECL_FRIEND_P (olddecl);
1924 hidden_friend = (DECL_ANTICIPATED (olddecl)
1925 && DECL_HIDDEN_FRIEND_P (olddecl)
1926 && newdecl_is_friend);
1927 DECL_BEFRIENDING_CLASSES (newdecl)
1928 = chainon (DECL_BEFRIENDING_CLASSES (newdecl),
1929 DECL_BEFRIENDING_CLASSES (olddecl));
1930 /* DECL_THUNKS is only valid for virtual functions,
1931 otherwise it is a DECL_FRIEND_CONTEXT. */
1932 if (DECL_VIRTUAL_P (newdecl))
1933 DECL_THUNKS (newdecl) = DECL_THUNKS (olddecl);
1937 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1941 /* Merge parameter attributes. */
1942 tree oldarg, newarg;
1943 for (oldarg = DECL_ARGUMENTS(olddecl),
1944 newarg = DECL_ARGUMENTS(newdecl);
1946 oldarg = TREE_CHAIN(oldarg), newarg = TREE_CHAIN(newarg)) {
1947 DECL_ATTRIBUTES (newarg)
1948 = (*targetm.merge_decl_attributes) (oldarg, newarg);
1949 DECL_ATTRIBUTES (oldarg) = DECL_ATTRIBUTES (newarg);
1952 if (DECL_TEMPLATE_INSTANTIATION (olddecl)
1953 && !DECL_TEMPLATE_INSTANTIATION (newdecl))
1955 /* If newdecl is not a specialization, then it is not a
1956 template-related function at all. And that means that we
1957 should have exited above, returning 0. */
1958 gcc_assert (DECL_TEMPLATE_SPECIALIZATION (newdecl));
1960 if (DECL_ODR_USED (olddecl))
1961 /* From [temp.expl.spec]:
1963 If a template, a member template or the member of a class
1964 template is explicitly specialized then that
1965 specialization shall be declared before the first use of
1966 that specialization that would cause an implicit
1967 instantiation to take place, in every translation unit in
1968 which such a use occurs. */
1969 error ("explicit specialization of %qD after first use",
1972 SET_DECL_TEMPLATE_SPECIALIZATION (olddecl);
1974 /* Don't propagate visibility from the template to the
1975 specialization here. We'll do that in determine_visibility if
1977 DECL_VISIBILITY_SPECIFIED (olddecl) = 0;
1979 /* [temp.expl.spec/14] We don't inline explicit specialization
1980 just because the primary template says so. */
1982 else if (new_defines_function && DECL_INITIAL (olddecl))
1984 /* Never inline re-defined extern inline functions.
1985 FIXME: this could be better handled by keeping both
1986 function as separate declarations. */
1987 DECL_UNINLINABLE (newdecl) = 1;
1991 if (DECL_PENDING_INLINE_INFO (newdecl) == 0)
1992 DECL_PENDING_INLINE_INFO (newdecl) = DECL_PENDING_INLINE_INFO (olddecl);
1994 DECL_DECLARED_INLINE_P (newdecl) |= DECL_DECLARED_INLINE_P (olddecl);
1996 DECL_UNINLINABLE (newdecl) = DECL_UNINLINABLE (olddecl)
1997 = (DECL_UNINLINABLE (newdecl) || DECL_UNINLINABLE (olddecl));
1999 DECL_DISREGARD_INLINE_LIMITS (newdecl)
2000 = DECL_DISREGARD_INLINE_LIMITS (olddecl)
2001 = (DECL_DISREGARD_INLINE_LIMITS (newdecl)
2002 || DECL_DISREGARD_INLINE_LIMITS (olddecl));
2005 /* Preserve abstractness on cloned [cd]tors. */
2006 DECL_ABSTRACT (newdecl) = DECL_ABSTRACT (olddecl);
2008 /* Update newdecl's parms to point at olddecl. */
2009 for (parm = DECL_ARGUMENTS (newdecl); parm;
2010 parm = TREE_CHAIN (parm))
2011 DECL_CONTEXT (parm) = olddecl;
2015 SET_DECL_LANGUAGE (olddecl, DECL_LANGUAGE (newdecl));
2016 COPY_DECL_ASSEMBLER_NAME (newdecl, olddecl);
2017 COPY_DECL_RTL (newdecl, olddecl);
2019 if (! types_match || new_defines_function)
2021 /* These need to be copied so that the names are available.
2022 Note that if the types do match, we'll preserve inline
2023 info and other bits, but if not, we won't. */
2024 DECL_ARGUMENTS (olddecl) = DECL_ARGUMENTS (newdecl);
2025 DECL_RESULT (olddecl) = DECL_RESULT (newdecl);
2027 if (new_defines_function)
2028 /* If defining a function declared with other language
2029 linkage, use the previously declared language linkage. */
2030 SET_DECL_LANGUAGE (newdecl, DECL_LANGUAGE (olddecl));
2031 else if (types_match)
2033 /* If redeclaring a builtin function, and not a definition,
2034 it stays built in. */
2035 if (DECL_BUILT_IN (olddecl))
2037 DECL_BUILT_IN_CLASS (newdecl) = DECL_BUILT_IN_CLASS (olddecl);
2038 DECL_FUNCTION_CODE (newdecl) = DECL_FUNCTION_CODE (olddecl);
2039 /* If we're keeping the built-in definition, keep the rtl,
2040 regardless of declaration matches. */
2041 COPY_DECL_RTL (olddecl, newdecl);
2044 DECL_RESULT (newdecl) = DECL_RESULT (olddecl);
2045 /* Don't clear out the arguments if we're just redeclaring a
2047 if (DECL_ARGUMENTS (olddecl))
2048 DECL_ARGUMENTS (newdecl) = DECL_ARGUMENTS (olddecl);
2051 else if (TREE_CODE (newdecl) == NAMESPACE_DECL)
2052 NAMESPACE_LEVEL (newdecl) = NAMESPACE_LEVEL (olddecl);
2054 /* Now preserve various other info from the definition. */
2055 TREE_ADDRESSABLE (newdecl) = TREE_ADDRESSABLE (olddecl);
2056 TREE_ASM_WRITTEN (newdecl) = TREE_ASM_WRITTEN (olddecl);
2057 DECL_COMMON (newdecl) = DECL_COMMON (olddecl);
2058 COPY_DECL_ASSEMBLER_NAME (olddecl, newdecl);
2060 /* Warn about conflicting visibility specifications. */
2061 if (DECL_VISIBILITY_SPECIFIED (olddecl)
2062 && DECL_VISIBILITY_SPECIFIED (newdecl)
2063 && DECL_VISIBILITY (newdecl) != DECL_VISIBILITY (olddecl))
2065 warning_at (input_location, OPT_Wattributes,
2066 "%q+D: visibility attribute ignored because it", newdecl);
2067 warning_at (DECL_SOURCE_LOCATION (olddecl), OPT_Wattributes,
2068 "conflicts with previous declaration here");
2070 /* Choose the declaration which specified visibility. */
2071 if (DECL_VISIBILITY_SPECIFIED (olddecl))
2073 DECL_VISIBILITY (newdecl) = DECL_VISIBILITY (olddecl);
2074 DECL_VISIBILITY_SPECIFIED (newdecl) = 1;
2076 /* Init priority used to be merged from newdecl to olddecl by the memcpy,
2077 so keep this behavior. */
2078 if (TREE_CODE (newdecl) == VAR_DECL && DECL_HAS_INIT_PRIORITY_P (newdecl))
2080 SET_DECL_INIT_PRIORITY (olddecl, DECL_INIT_PRIORITY (newdecl));
2081 DECL_HAS_INIT_PRIORITY_P (olddecl) = 1;
2084 /* The DECL_LANG_SPECIFIC information in OLDDECL will be replaced
2085 with that from NEWDECL below. */
2086 if (DECL_LANG_SPECIFIC (olddecl))
2088 gcc_assert (DECL_LANG_SPECIFIC (olddecl)
2089 != DECL_LANG_SPECIFIC (newdecl));
2090 ggc_free (DECL_LANG_SPECIFIC (olddecl));
2093 /* Merge the USED information. */
2094 if (TREE_USED (olddecl))
2095 TREE_USED (newdecl) = 1;
2096 else if (TREE_USED (newdecl))
2097 TREE_USED (olddecl) = 1;
2099 if (TREE_CODE (newdecl) == FUNCTION_DECL)
2103 function_size = sizeof (struct tree_decl_common);
2105 memcpy ((char *) olddecl + sizeof (struct tree_common),
2106 (char *) newdecl + sizeof (struct tree_common),
2107 function_size - sizeof (struct tree_common));
2109 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
2110 (char *) newdecl + sizeof (struct tree_decl_common),
2111 sizeof (struct tree_function_decl) - sizeof (struct tree_decl_common));
2112 if (new_template_info)
2113 /* If newdecl is a template instantiation, it is possible that
2114 the following sequence of events has occurred:
2116 o A friend function was declared in a class template. The
2117 class template was instantiated.
2119 o The instantiation of the friend declaration was
2120 recorded on the instantiation list, and is newdecl.
2122 o Later, however, instantiate_class_template called pushdecl
2123 on the newdecl to perform name injection. But, pushdecl in
2124 turn called duplicate_decls when it discovered that another
2125 declaration of a global function with the same name already
2128 o Here, in duplicate_decls, we decided to clobber newdecl.
2130 If we're going to do that, we'd better make sure that
2131 olddecl, and not newdecl, is on the list of
2132 instantiations so that if we try to do the instantiation
2133 again we won't get the clobbered declaration. */
2134 reregister_specialization (newdecl,
2140 size_t size = tree_code_size (TREE_CODE (olddecl));
2141 memcpy ((char *) olddecl + sizeof (struct tree_common),
2142 (char *) newdecl + sizeof (struct tree_common),
2143 sizeof (struct tree_decl_common) - sizeof (struct tree_common));
2144 switch (TREE_CODE (olddecl))
2154 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
2155 (char *) newdecl + sizeof (struct tree_decl_common),
2156 size - sizeof (struct tree_decl_common)
2157 + TREE_CODE_LENGTH (TREE_CODE (newdecl)) * sizeof (char *));
2161 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
2162 (char *) newdecl + sizeof (struct tree_decl_common),
2163 sizeof (struct tree_decl_non_common) - sizeof (struct tree_decl_common)
2164 + TREE_CODE_LENGTH (TREE_CODE (newdecl)) * sizeof (char *));
2168 DECL_UID (olddecl) = olddecl_uid;
2170 DECL_FRIEND_P (olddecl) = 1;
2173 DECL_ANTICIPATED (olddecl) = 1;
2174 DECL_HIDDEN_FRIEND_P (olddecl) = 1;
2177 /* NEWDECL contains the merged attribute lists.
2178 Update OLDDECL to be the same. */
2179 DECL_ATTRIBUTES (olddecl) = DECL_ATTRIBUTES (newdecl);
2181 /* If OLDDECL had its DECL_RTL instantiated, re-invoke make_decl_rtl
2182 so that encode_section_info has a chance to look at the new decl
2183 flags and attributes. */
2184 if (DECL_RTL_SET_P (olddecl)
2185 && (TREE_CODE (olddecl) == FUNCTION_DECL
2186 || (TREE_CODE (olddecl) == VAR_DECL
2187 && TREE_STATIC (olddecl))))
2188 make_decl_rtl (olddecl);
2190 /* The NEWDECL will no longer be needed. Because every out-of-class
2191 declaration of a member results in a call to duplicate_decls,
2192 freeing these nodes represents in a significant savings. */
2198 /* Return zero if the declaration NEWDECL is valid
2199 when the declaration OLDDECL (assumed to be for the same name)
2200 has already been seen.
2201 Otherwise return an error message format string with a %s
2202 where the identifier should go. */
2205 redeclaration_error_message (tree newdecl, tree olddecl)
2207 if (TREE_CODE (newdecl) == TYPE_DECL)
2209 /* Because C++ can put things into name space for free,
2210 constructs like "typedef struct foo { ... } foo"
2211 would look like an erroneous redeclaration. */
2212 if (same_type_p (TREE_TYPE (newdecl), TREE_TYPE (olddecl)))
2215 return "redefinition of %q#D";
2217 else if (TREE_CODE (newdecl) == FUNCTION_DECL)
2219 /* If this is a pure function, its olddecl will actually be
2220 the original initialization to `0' (which we force to call
2221 abort()). Don't complain about redefinition in this case. */
2222 if (DECL_LANG_SPECIFIC (olddecl) && DECL_PURE_VIRTUAL_P (olddecl)
2223 && DECL_INITIAL (olddecl) == NULL_TREE)
2226 /* If both functions come from different namespaces, this is not
2227 a redeclaration - this is a conflict with a used function. */
2228 if (DECL_NAMESPACE_SCOPE_P (olddecl)
2229 && DECL_CONTEXT (olddecl) != DECL_CONTEXT (newdecl)
2230 && ! decls_match (olddecl, newdecl))
2231 return "%qD conflicts with used function";
2233 /* We'll complain about linkage mismatches in
2234 warn_extern_redeclared_static. */
2236 /* Defining the same name twice is no good. */
2237 if (DECL_INITIAL (olddecl) != NULL_TREE
2238 && DECL_INITIAL (newdecl) != NULL_TREE)
2240 if (DECL_NAME (olddecl) == NULL_TREE)
2241 return "%q#D not declared in class";
2242 else if (!GNU_INLINE_P (olddecl)
2243 || GNU_INLINE_P (newdecl))
2244 return "redefinition of %q#D";
2247 if (DECL_DECLARED_INLINE_P (olddecl) && DECL_DECLARED_INLINE_P (newdecl))
2249 bool olda = GNU_INLINE_P (olddecl);
2250 bool newa = GNU_INLINE_P (newdecl);
2255 return "%q+D redeclared inline with %<gnu_inline%> attribute";
2257 return "%q+D redeclared inline without %<gnu_inline%> attribute";
2263 else if (TREE_CODE (newdecl) == TEMPLATE_DECL)
2267 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
2269 if (COMPLETE_TYPE_P (TREE_TYPE (newdecl))
2270 && COMPLETE_TYPE_P (TREE_TYPE (olddecl)))
2271 return "redefinition of %q#D";
2275 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) != FUNCTION_DECL
2276 || (DECL_TEMPLATE_RESULT (newdecl)
2277 == DECL_TEMPLATE_RESULT (olddecl)))
2280 nt = DECL_TEMPLATE_RESULT (newdecl);
2281 if (DECL_TEMPLATE_INFO (nt))
2282 nt = DECL_TEMPLATE_RESULT (template_for_substitution (nt));
2283 ot = DECL_TEMPLATE_RESULT (olddecl);
2284 if (DECL_TEMPLATE_INFO (ot))
2285 ot = DECL_TEMPLATE_RESULT (template_for_substitution (ot));
2286 if (DECL_INITIAL (nt) && DECL_INITIAL (ot)
2287 && (!GNU_INLINE_P (ot) || GNU_INLINE_P (nt)))
2288 return "redefinition of %q#D";
2290 if (DECL_DECLARED_INLINE_P (ot) && DECL_DECLARED_INLINE_P (nt))
2292 bool olda = GNU_INLINE_P (ot);
2293 bool newa = GNU_INLINE_P (nt);
2298 return "%q+D redeclared inline with %<gnu_inline%> attribute";
2300 return "%q+D redeclared inline without %<gnu_inline%> attribute";
2304 /* Core issue #226 (C++0x):
2306 If a friend function template declaration specifies a
2307 default template-argument, that declaration shall be a
2308 definition and shall be the only declaration of the
2309 function template in the translation unit. */
2310 if ((cxx_dialect != cxx98)
2311 && TREE_CODE (ot) == FUNCTION_DECL && DECL_FRIEND_P (ot)
2312 && !check_default_tmpl_args (nt, DECL_TEMPLATE_PARMS (newdecl),
2313 /*is_primary=*/1, /*is_partial=*/0,
2314 /*is_friend_decl=*/2))
2315 return "redeclaration of friend %q#D may not have default template arguments";
2319 else if (TREE_CODE (newdecl) == VAR_DECL
2320 && DECL_THREAD_LOCAL_P (newdecl) != DECL_THREAD_LOCAL_P (olddecl)
2321 && (! DECL_LANG_SPECIFIC (olddecl)
2322 || ! CP_DECL_THREADPRIVATE_P (olddecl)
2323 || DECL_THREAD_LOCAL_P (newdecl)))
2325 /* Only variables can be thread-local, and all declarations must
2326 agree on this property. */
2327 if (DECL_THREAD_LOCAL_P (newdecl))
2328 return "thread-local declaration of %q#D follows "
2329 "non-thread-local declaration";
2331 return "non-thread-local declaration of %q#D follows "
2332 "thread-local declaration";
2334 else if (toplevel_bindings_p () || DECL_NAMESPACE_SCOPE_P (newdecl))
2336 /* The objects have been declared at namespace scope. If either
2337 is a member of an anonymous union, then this is an invalid
2338 redeclaration. For example:
2344 if ((TREE_CODE (newdecl) == VAR_DECL && DECL_ANON_UNION_VAR_P (newdecl))
2345 || (TREE_CODE (olddecl) == VAR_DECL && DECL_ANON_UNION_VAR_P (olddecl)))
2346 return "redeclaration of %q#D";
2347 /* If at least one declaration is a reference, there is no
2348 conflict. For example:
2354 if (DECL_EXTERNAL (newdecl) || DECL_EXTERNAL (olddecl))
2356 /* Reject two definitions. */
2357 return "redefinition of %q#D";
2361 /* Objects declared with block scope: */
2362 /* Reject two definitions, and reject a definition
2363 together with an external reference. */
2364 if (!(DECL_EXTERNAL (newdecl) && DECL_EXTERNAL (olddecl)))
2365 return "redeclaration of %q#D";
2370 /* Hash and equality functions for the named_label table. */
2373 named_label_entry_hash (const void *data)
2375 const struct named_label_entry *ent = (const struct named_label_entry *) data;
2376 return DECL_UID (ent->label_decl);
2380 named_label_entry_eq (const void *a, const void *b)
2382 const struct named_label_entry *ent_a = (const struct named_label_entry *) a;
2383 const struct named_label_entry *ent_b = (const struct named_label_entry *) b;
2384 return ent_a->label_decl == ent_b->label_decl;
2387 /* Create a new label, named ID. */
2390 make_label_decl (tree id, int local_p)
2392 struct named_label_entry *ent;
2396 decl = build_decl (input_location, LABEL_DECL, id, void_type_node);
2398 DECL_CONTEXT (decl) = current_function_decl;
2399 DECL_MODE (decl) = VOIDmode;
2400 C_DECLARED_LABEL_FLAG (decl) = local_p;
2402 /* Say where one reference is to the label, for the sake of the
2403 error if it is not defined. */
2404 DECL_SOURCE_LOCATION (decl) = input_location;
2406 /* Record the fact that this identifier is bound to this label. */
2407 SET_IDENTIFIER_LABEL_VALUE (id, decl);
2409 /* Create the label htab for the function on demand. */
2411 named_labels = htab_create_ggc (13, named_label_entry_hash,
2412 named_label_entry_eq, NULL);
2414 /* Record this label on the list of labels used in this function.
2415 We do this before calling make_label_decl so that we get the
2416 IDENTIFIER_LABEL_VALUE before the new label is declared. */
2417 ent = GGC_CNEW (struct named_label_entry);
2418 ent->label_decl = decl;
2420 slot = htab_find_slot (named_labels, ent, INSERT);
2421 gcc_assert (*slot == NULL);
2427 /* Look for a label named ID in the current function. If one cannot
2428 be found, create one. (We keep track of used, but undefined,
2429 labels, and complain about them at the end of a function.) */
2432 lookup_label (tree id)
2436 timevar_push (TV_NAME_LOOKUP);
2437 /* You can't use labels at global scope. */
2438 if (current_function_decl == NULL_TREE)
2440 error ("label %qE referenced outside of any function", id);
2441 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, NULL_TREE);
2444 /* See if we've already got this label. */
2445 decl = IDENTIFIER_LABEL_VALUE (id);
2446 if (decl != NULL_TREE && DECL_CONTEXT (decl) == current_function_decl)
2447 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2449 decl = make_label_decl (id, /*local_p=*/0);
2450 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2453 /* Declare a local label named ID. */
2456 declare_local_label (tree id)
2460 /* Add a new entry to the SHADOWED_LABELS list so that when we leave
2461 this scope we can restore the old value of IDENTIFIER_TYPE_VALUE. */
2462 shadow = tree_cons (IDENTIFIER_LABEL_VALUE (id), NULL_TREE,
2463 current_binding_level->shadowed_labels);
2464 current_binding_level->shadowed_labels = shadow;
2466 decl = make_label_decl (id, /*local_p=*/1);
2467 TREE_VALUE (shadow) = decl;
2472 /* Returns nonzero if it is ill-formed to jump past the declaration of
2473 DECL. Returns 2 if it's also a real problem. */
2476 decl_jump_unsafe (tree decl)
2478 /* [stmt.dcl]/3: A program that jumps from a point where a local variable
2479 with automatic storage duration is not in scope to a point where it is
2480 in scope is ill-formed unless the variable has scalar type, class type
2481 with a trivial default constructor and a trivial destructor, a
2482 cv-qualified version of one of these types, or an array of one of the
2483 preceding types and is declared without an initializer (8.5). */
2484 tree type = TREE_TYPE (decl);
2486 if (TREE_CODE (decl) != VAR_DECL || TREE_STATIC (decl)
2487 || type == error_mark_node)
2490 type = strip_array_types (type);
2492 if (type_has_nontrivial_default_init (TREE_TYPE (decl))
2493 || DECL_NONTRIVIALLY_INITIALIZED_P (decl))
2496 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
2502 /* A subroutine of check_previous_goto_1 to identify a branch to the user. */
2505 identify_goto (tree decl, const location_t *locus)
2508 permerror (input_location, "jump to label %qD", decl);
2510 permerror (input_location, "jump to case label");
2512 permerror (*locus, " from here");
2515 /* Check that a single previously seen jump to a newly defined label
2516 is OK. DECL is the LABEL_DECL or 0; LEVEL is the binding_level for
2517 the jump context; NAMES are the names in scope in LEVEL at the jump
2518 context; LOCUS is the source position of the jump or 0. Returns
2519 true if all is well. */
2522 check_previous_goto_1 (tree decl, struct cp_binding_level* level, tree names,
2523 bool exited_omp, const location_t *locus)
2525 struct cp_binding_level *b;
2526 bool identified = false, saw_eh = false, saw_omp = false;
2530 identify_goto (decl, locus);
2531 error (" exits OpenMP structured block");
2532 identified = saw_omp = true;
2535 for (b = current_binding_level; b ; b = b->level_chain)
2537 tree new_decls, old_decls = (b == level ? names : NULL_TREE);
2539 for (new_decls = b->names; new_decls != old_decls;
2540 new_decls = TREE_CHAIN (new_decls))
2542 int problem = decl_jump_unsafe (new_decls);
2548 identify_goto (decl, locus);
2552 error (" crosses initialization of %q+#D", new_decls);
2554 permerror (input_location, " enters scope of %q+#D which has "
2555 "non-trivial destructor", new_decls);
2560 if ((b->kind == sk_try || b->kind == sk_catch) && !saw_eh)
2564 identify_goto (decl, locus);
2567 if (b->kind == sk_try)
2568 error (" enters try block");
2570 error (" enters catch block");
2573 if (b->kind == sk_omp && !saw_omp)
2577 identify_goto (decl, locus);
2580 error (" enters OpenMP structured block");
2589 check_previous_goto (tree decl, struct named_label_use_entry *use)
2591 check_previous_goto_1 (decl, use->binding_level,
2592 use->names_in_scope, use->in_omp_scope,
2593 &use->o_goto_locus);
2597 check_switch_goto (struct cp_binding_level* level)
2599 return check_previous_goto_1 (NULL_TREE, level, level->names, false, NULL);
2602 /* Check that a new jump to a label DECL is OK. Called by
2603 finish_goto_stmt. */
2606 check_goto (tree decl)
2608 struct named_label_entry *ent, dummy;
2609 bool saw_catch = false, identified = false;
2612 /* We can't know where a computed goto is jumping.
2613 So we assume that it's OK. */
2614 if (TREE_CODE (decl) != LABEL_DECL)
2617 /* We didn't record any information about this label when we created it,
2618 and there's not much point since it's trivial to analyze as a return. */
2619 if (decl == cdtor_label)
2622 dummy.label_decl = decl;
2623 ent = (struct named_label_entry *) htab_find (named_labels, &dummy);
2624 gcc_assert (ent != NULL);
2626 /* If the label hasn't been defined yet, defer checking. */
2627 if (! DECL_INITIAL (decl))
2629 struct named_label_use_entry *new_use;
2631 /* Don't bother creating another use if the last goto had the
2632 same data, and will therefore create the same set of errors. */
2634 && ent->uses->names_in_scope == current_binding_level->names)
2637 new_use = GGC_NEW (struct named_label_use_entry);
2638 new_use->binding_level = current_binding_level;
2639 new_use->names_in_scope = current_binding_level->names;
2640 new_use->o_goto_locus = input_location;
2641 new_use->in_omp_scope = false;
2643 new_use->next = ent->uses;
2644 ent->uses = new_use;
2648 if (ent->in_try_scope || ent->in_catch_scope
2649 || ent->in_omp_scope || ent->bad_decls)
2651 permerror (input_location, "jump to label %q+D", decl);
2652 permerror (input_location, " from here");
2656 for (bad = ent->bad_decls; bad; bad = TREE_CHAIN (bad))
2658 tree b = TREE_VALUE (bad);
2659 int u = decl_jump_unsafe (b);
2661 if (u > 1 && DECL_ARTIFICIAL (b))
2663 /* Can't skip init of __exception_info. */
2664 error_at (DECL_SOURCE_LOCATION (b), " enters catch block");
2668 error (" skips initialization of %q+#D", b);
2670 permerror (input_location, " enters scope of %q+#D which has "
2671 "non-trivial destructor", b);
2674 if (ent->in_try_scope)
2675 error (" enters try block");
2676 else if (ent->in_catch_scope && !saw_catch)
2677 error (" enters catch block");
2679 if (ent->in_omp_scope)
2680 error (" enters OpenMP structured block");
2681 else if (flag_openmp)
2683 struct cp_binding_level *b;
2684 for (b = current_binding_level; b ; b = b->level_chain)
2686 if (b == ent->binding_level)
2688 if (b->kind == sk_omp)
2692 permerror (input_location, "jump to label %q+D", decl);
2693 permerror (input_location, " from here");
2696 error (" exits OpenMP structured block");
2703 /* Check that a return is ok wrt OpenMP structured blocks.
2704 Called by finish_return_stmt. Returns true if all is well. */
2707 check_omp_return (void)
2709 struct cp_binding_level *b;
2710 for (b = current_binding_level; b ; b = b->level_chain)
2711 if (b->kind == sk_omp)
2713 error ("invalid exit from OpenMP structured block");
2719 /* Define a label, specifying the location in the source file.
2720 Return the LABEL_DECL node for the label. */
2723 define_label (location_t location, tree name)
2725 struct named_label_entry *ent, dummy;
2726 struct cp_binding_level *p;
2729 timevar_push (TV_NAME_LOOKUP);
2731 decl = lookup_label (name);
2733 dummy.label_decl = decl;
2734 ent = (struct named_label_entry *) htab_find (named_labels, &dummy);
2735 gcc_assert (ent != NULL);
2737 /* After labels, make any new cleanups in the function go into their
2738 own new (temporary) binding contour. */
2739 for (p = current_binding_level;
2740 p->kind != sk_function_parms;
2742 p->more_cleanups_ok = 0;
2744 if (name == get_identifier ("wchar_t"))
2745 permerror (input_location, "label named wchar_t");
2747 if (DECL_INITIAL (decl) != NULL_TREE)
2749 error ("duplicate label %qD", decl);
2750 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
2754 struct named_label_use_entry *use;
2756 /* Mark label as having been defined. */
2757 DECL_INITIAL (decl) = error_mark_node;
2758 /* Say where in the source. */
2759 DECL_SOURCE_LOCATION (decl) = location;
2761 ent->binding_level = current_binding_level;
2762 ent->names_in_scope = current_binding_level->names;
2764 for (use = ent->uses; use ; use = use->next)
2765 check_previous_goto (decl, use);
2769 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2774 struct cp_binding_level *level;
2775 struct cp_switch *next;
2776 /* The SWITCH_STMT being built. */
2778 /* A splay-tree mapping the low element of a case range to the high
2779 element, or NULL_TREE if there is no high element. Used to
2780 determine whether or not a new case label duplicates an old case
2781 label. We need a tree, rather than simply a hash table, because
2782 of the GNU case range extension. */
2786 /* A stack of the currently active switch statements. The innermost
2787 switch statement is on the top of the stack. There is no need to
2788 mark the stack for garbage collection because it is only active
2789 during the processing of the body of a function, and we never
2790 collect at that point. */
2792 static struct cp_switch *switch_stack;
2794 /* Called right after a switch-statement condition is parsed.
2795 SWITCH_STMT is the switch statement being parsed. */
2798 push_switch (tree switch_stmt)
2800 struct cp_switch *p = XNEW (struct cp_switch);
2801 p->level = current_binding_level;
2802 p->next = switch_stack;
2803 p->switch_stmt = switch_stmt;
2804 p->cases = splay_tree_new (case_compare, NULL, NULL);
2811 struct cp_switch *cs = switch_stack;
2812 location_t switch_location;
2814 /* Emit warnings as needed. */
2815 if (EXPR_HAS_LOCATION (cs->switch_stmt))
2816 switch_location = EXPR_LOCATION (cs->switch_stmt);
2818 switch_location = input_location;
2819 if (!processing_template_decl)
2820 c_do_switch_warnings (cs->cases, switch_location,
2821 SWITCH_STMT_TYPE (cs->switch_stmt),
2822 SWITCH_STMT_COND (cs->switch_stmt));
2824 splay_tree_delete (cs->cases);
2825 switch_stack = switch_stack->next;
2829 /* Note that we've seen a definition of a case label, and complain if this
2830 is a bad place for one. */
2833 finish_case_label (location_t loc, tree low_value, tree high_value)
2836 struct cp_binding_level *p;
2838 if (processing_template_decl)
2842 /* For templates, just add the case label; we'll do semantic
2843 analysis at instantiation-time. */
2844 label = build_decl (loc, LABEL_DECL, NULL_TREE, NULL_TREE);
2845 return add_stmt (build_case_label (loc, low_value, high_value, label));
2848 /* Find the condition on which this switch statement depends. */
2849 cond = SWITCH_STMT_COND (switch_stack->switch_stmt);
2850 if (cond && TREE_CODE (cond) == TREE_LIST)
2851 cond = TREE_VALUE (cond);
2853 if (!check_switch_goto (switch_stack->level))
2854 return error_mark_node;
2856 r = c_add_case_label (loc, switch_stack->cases, cond,
2857 SWITCH_STMT_TYPE (switch_stack->switch_stmt),
2858 low_value, high_value);
2860 /* After labels, make any new cleanups in the function go into their
2861 own new (temporary) binding contour. */
2862 for (p = current_binding_level;
2863 p->kind != sk_function_parms;
2865 p->more_cleanups_ok = 0;
2870 /* Hash a TYPENAME_TYPE. K is really of type `tree'. */
2873 typename_hash (const void* k)
2876 const_tree const t = (const_tree) k;
2878 hash = (htab_hash_pointer (TYPE_CONTEXT (t))
2879 ^ htab_hash_pointer (DECL_NAME (TYPE_NAME (t))));
2884 typedef struct typename_info {
2892 /* Compare two TYPENAME_TYPEs. K1 is really of type `tree', K2 is
2893 really of type `typename_info*' */
2896 typename_compare (const void * k1, const void * k2)
2898 const_tree const t1 = (const_tree) k1;
2899 const typename_info *const t2 = (const typename_info *) k2;
2901 return (DECL_NAME (TYPE_NAME (t1)) == t2->name
2902 && TYPE_CONTEXT (t1) == t2->scope
2903 && TYPENAME_TYPE_FULLNAME (t1) == t2->template_id
2904 && TYPENAME_IS_ENUM_P (t1) == t2->enum_p
2905 && TYPENAME_IS_CLASS_P (t1) == t2->class_p);
2908 /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
2909 the type of `T', NAME is the IDENTIFIER_NODE for `t'.
2911 Returns the new TYPENAME_TYPE. */
2913 static GTY ((param_is (union tree_node))) htab_t typename_htab;
2916 build_typename_type (tree context, tree name, tree fullname,
2917 enum tag_types tag_type)
2925 if (typename_htab == NULL)
2926 typename_htab = htab_create_ggc (61, &typename_hash,
2927 &typename_compare, NULL);
2929 ti.scope = FROB_CONTEXT (context);
2931 ti.template_id = fullname;
2932 ti.enum_p = tag_type == enum_type;
2933 ti.class_p = (tag_type == class_type
2934 || tag_type == record_type
2935 || tag_type == union_type);
2936 hash = (htab_hash_pointer (ti.scope)
2937 ^ htab_hash_pointer (ti.name));
2939 /* See if we already have this type. */
2940 e = htab_find_slot_with_hash (typename_htab, &ti, hash, INSERT);
2945 /* Build the TYPENAME_TYPE. */
2946 t = cxx_make_type (TYPENAME_TYPE);
2947 TYPE_CONTEXT (t) = ti.scope;
2948 TYPENAME_TYPE_FULLNAME (t) = ti.template_id;
2949 TYPENAME_IS_ENUM_P (t) = ti.enum_p;
2950 TYPENAME_IS_CLASS_P (t) = ti.class_p;
2952 /* Build the corresponding TYPE_DECL. */
2953 d = build_decl (input_location, TYPE_DECL, name, t);
2954 TYPE_NAME (TREE_TYPE (d)) = d;
2955 TYPE_STUB_DECL (TREE_TYPE (d)) = d;
2956 DECL_CONTEXT (d) = FROB_CONTEXT (context);
2957 DECL_ARTIFICIAL (d) = 1;
2959 /* Store it in the hash table. */
2962 /* TYPENAME_TYPEs must always be compared structurally, because
2963 they may or may not resolve down to another type depending on
2964 the currently open classes. */
2965 SET_TYPE_STRUCTURAL_EQUALITY (t);
2971 /* Resolve `typename CONTEXT::NAME'. TAG_TYPE indicates the tag
2972 provided to name the type. Returns an appropriate type, unless an
2973 error occurs, in which case error_mark_node is returned. If we
2974 locate a non-artificial TYPE_DECL and TF_KEEP_TYPE_DECL is set, we
2975 return that, rather than the _TYPE it corresponds to, in other
2976 cases we look through the type decl. If TF_ERROR is set, complain
2977 about errors, otherwise be quiet. */
2980 make_typename_type (tree context, tree name, enum tag_types tag_type,
2981 tsubst_flags_t complain)
2987 if (name == error_mark_node
2988 || context == NULL_TREE
2989 || context == error_mark_node)
2990 return error_mark_node;
2994 if (!(TYPE_LANG_SPECIFIC (name)
2995 && (CLASSTYPE_IS_TEMPLATE (name)
2996 || CLASSTYPE_USE_TEMPLATE (name))))
2997 name = TYPE_IDENTIFIER (name);
2999 /* Create a TEMPLATE_ID_EXPR for the type. */
3000 name = build_nt (TEMPLATE_ID_EXPR,
3001 CLASSTYPE_TI_TEMPLATE (name),
3002 CLASSTYPE_TI_ARGS (name));
3004 else if (TREE_CODE (name) == TYPE_DECL)
3005 name = DECL_NAME (name);
3009 if (TREE_CODE (name) == TEMPLATE_ID_EXPR)
3011 name = TREE_OPERAND (name, 0);
3012 if (TREE_CODE (name) == TEMPLATE_DECL)
3013 name = TREE_OPERAND (fullname, 0) = DECL_NAME (name);
3014 else if (TREE_CODE (name) == OVERLOAD)
3016 error ("%qD is not a type", name);
3017 return error_mark_node;
3020 if (TREE_CODE (name) == TEMPLATE_DECL)
3022 error ("%qD used without template parameters", name);
3023 return error_mark_node;
3025 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
3026 gcc_assert (TYPE_P (context));
3028 if (!MAYBE_CLASS_TYPE_P (context))
3030 if (complain & tf_error)
3031 error ("%q#T is not a class", context);
3032 return error_mark_node;
3035 /* When the CONTEXT is a dependent type, NAME could refer to a
3036 dependent base class of CONTEXT. But look inside it anyway
3037 if CONTEXT is a currently open scope, in case it refers to a
3038 member of the current instantiation or a non-dependent base;
3039 lookup will stop when we hit a dependent base. */
3040 if (!dependent_scope_p (context))
3041 /* We should only set WANT_TYPE when we're a nested typename type.
3042 Then we can give better diagnostics if we find a non-type. */
3043 t = lookup_field (context, name, 2, /*want_type=*/true);
3047 if ((!t || TREE_CODE (t) == TREE_LIST) && dependent_type_p (context))
3048 return build_typename_type (context, name, fullname, tag_type);
3050 want_template = TREE_CODE (fullname) == TEMPLATE_ID_EXPR;
3054 if (complain & tf_error)
3055 error (want_template ? "no class template named %q#T in %q#T"
3056 : "no type named %q#T in %q#T", name, context);
3057 return error_mark_node;
3060 /* Pull out the template from an injected-class-name (or multiple). */
3062 t = maybe_get_template_decl_from_type_decl (t);
3064 if (TREE_CODE (t) == TREE_LIST)
3066 if (complain & tf_error)
3068 error ("lookup of %qT in %qT is ambiguous", name, context);
3069 print_candidates (t);
3071 return error_mark_node;
3074 if (want_template && !DECL_CLASS_TEMPLATE_P (t))
3076 if (complain & tf_error)
3077 error ("%<typename %T::%D%> names %q#T, which is not a class template",
3079 return error_mark_node;
3081 if (!want_template && TREE_CODE (t) != TYPE_DECL)
3083 if (complain & tf_error)
3084 error ("%<typename %T::%D%> names %q#T, which is not a type",
3086 return error_mark_node;
3089 if (complain & tf_error)
3090 perform_or_defer_access_check (TYPE_BINFO (context), t, t);
3093 return lookup_template_class (t, TREE_OPERAND (fullname, 1),
3095 /*entering_scope=*/0,
3096 tf_warning_or_error | tf_user);
3098 if (DECL_ARTIFICIAL (t) || !(complain & tf_keep_type_decl))
3104 /* Resolve `CONTEXT::template NAME'. Returns a TEMPLATE_DECL if the name
3105 can be resolved or an UNBOUND_CLASS_TEMPLATE, unless an error occurs,
3106 in which case error_mark_node is returned.
3108 If PARM_LIST is non-NULL, also make sure that the template parameter
3109 list of TEMPLATE_DECL matches.
3111 If COMPLAIN zero, don't complain about any errors that occur. */
3114 make_unbound_class_template (tree context, tree name, tree parm_list,
3115 tsubst_flags_t complain)
3121 name = TYPE_IDENTIFIER (name);
3122 else if (DECL_P (name))
3123 name = DECL_NAME (name);
3124 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
3126 if (!dependent_type_p (context)
3127 || currently_open_class (context))
3129 tree tmpl = NULL_TREE;
3131 if (MAYBE_CLASS_TYPE_P (context))
3132 tmpl = lookup_field (context, name, 0, false);
3134 if (!tmpl || !DECL_CLASS_TEMPLATE_P (tmpl))
3136 if (complain & tf_error)
3137 error ("no class template named %q#T in %q#T", name, context);
3138 return error_mark_node;
3142 && !comp_template_parms (DECL_TEMPLATE_PARMS (tmpl), parm_list))
3144 if (complain & tf_error)
3146 error ("template parameters do not match template");
3147 error ("%q+D declared here", tmpl);
3149 return error_mark_node;
3152 if (complain & tf_error)
3153 perform_or_defer_access_check (TYPE_BINFO (context), tmpl, tmpl);
3158 /* Build the UNBOUND_CLASS_TEMPLATE. */
3159 t = cxx_make_type (UNBOUND_CLASS_TEMPLATE);
3160 TYPE_CONTEXT (t) = FROB_CONTEXT (context);
3161 TREE_TYPE (t) = NULL_TREE;
3162 SET_TYPE_STRUCTURAL_EQUALITY (t);
3164 /* Build the corresponding TEMPLATE_DECL. */
3165 d = build_decl (input_location, TEMPLATE_DECL, name, t);
3166 TYPE_NAME (TREE_TYPE (d)) = d;
3167 TYPE_STUB_DECL (TREE_TYPE (d)) = d;
3168 DECL_CONTEXT (d) = FROB_CONTEXT (context);
3169 DECL_ARTIFICIAL (d) = 1;
3170 DECL_TEMPLATE_PARMS (d) = parm_list;
3177 /* Push the declarations of builtin types into the namespace.
3178 RID_INDEX is the index of the builtin type in the array
3179 RID_POINTERS. NAME is the name used when looking up the builtin
3180 type. TYPE is the _TYPE node for the builtin type. */
3183 record_builtin_type (enum rid rid_index,
3187 tree rname = NULL_TREE, tname = NULL_TREE;
3188 tree tdecl = NULL_TREE;
3190 if ((int) rid_index < (int) RID_MAX)
3191 rname = ridpointers[(int) rid_index];
3193 tname = get_identifier (name);
3195 /* The calls to SET_IDENTIFIER_GLOBAL_VALUE below should be
3196 eliminated. Built-in types should not be looked up name; their
3197 names are keywords that the parser can recognize. However, there
3198 is code in c-common.c that uses identifier_global_value to look
3199 up built-in types by name. */
3202 tdecl = build_decl (BUILTINS_LOCATION, TYPE_DECL, tname, type);
3203 DECL_ARTIFICIAL (tdecl) = 1;
3204 SET_IDENTIFIER_GLOBAL_VALUE (tname, tdecl);
3210 tdecl = build_decl (BUILTINS_LOCATION, TYPE_DECL, rname, type);
3211 DECL_ARTIFICIAL (tdecl) = 1;
3213 SET_IDENTIFIER_GLOBAL_VALUE (rname, tdecl);
3216 if (!TYPE_NAME (type))
3217 TYPE_NAME (type) = tdecl;
3220 debug_hooks->type_decl (tdecl, 0);
3223 /* Record one of the standard Java types.
3224 * Declare it as having the given NAME.
3225 * If SIZE > 0, it is the size of one of the integral types;
3226 * otherwise it is the negative of the size of one of the other types. */
3229 record_builtin_java_type (const char* name, int size)
3233 type = build_nonstandard_integer_type (size, 0);
3234 else if (size > -32)
3237 /* "__java_char" or ""__java_boolean". */
3238 type = build_nonstandard_integer_type (-size, 1);
3239 /* Get the signed type cached and attached to the unsigned type,
3240 so it doesn't get garbage-collected at "random" times,
3241 causing potential codegen differences out of different UIDs
3242 and different alias set numbers. */
3243 stype = build_nonstandard_integer_type (-size, 0);
3244 TREE_CHAIN (type) = stype;
3245 /*if (size == -1) TREE_SET_CODE (type, BOOLEAN_TYPE);*/
3248 { /* "__java_float" or ""__java_double". */
3249 type = make_node (REAL_TYPE);
3250 TYPE_PRECISION (type) = - size;
3253 record_builtin_type (RID_MAX, name, type);
3254 decl = TYPE_NAME (type);
3256 /* Suppress generate debug symbol entries for these types,
3257 since for normal C++ they are just clutter.
3258 However, push_lang_context undoes this if extern "Java" is seen. */
3259 DECL_IGNORED_P (decl) = 1;
3261 TYPE_FOR_JAVA (type) = 1;
3265 /* Push a type into the namespace so that the back ends ignore it. */
3268 record_unknown_type (tree type, const char* name)
3270 tree decl = pushdecl (build_decl (UNKNOWN_LOCATION,
3271 TYPE_DECL, get_identifier (name), type));
3272 /* Make sure the "unknown type" typedecl gets ignored for debug info. */
3273 DECL_IGNORED_P (decl) = 1;
3274 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
3275 TYPE_SIZE (type) = TYPE_SIZE (void_type_node);
3276 TYPE_ALIGN (type) = 1;
3277 TYPE_USER_ALIGN (type) = 0;
3278 SET_TYPE_MODE (type, TYPE_MODE (void_type_node));
3281 /* A string for which we should create an IDENTIFIER_NODE at
3284 typedef struct predefined_identifier
3286 /* The name of the identifier. */
3287 const char *const name;
3288 /* The place where the IDENTIFIER_NODE should be stored. */
3290 /* Nonzero if this is the name of a constructor or destructor. */
3291 const int ctor_or_dtor_p;
3292 } predefined_identifier;
3294 /* Create all the predefined identifiers. */
3297 initialize_predefined_identifiers (void)
3299 const predefined_identifier *pid;
3301 /* A table of identifiers to create at startup. */
3302 static const predefined_identifier predefined_identifiers[] = {
3303 { "C++", &lang_name_cplusplus, 0 },
3304 { "C", &lang_name_c, 0 },
3305 { "Java", &lang_name_java, 0 },
3306 /* Some of these names have a trailing space so that it is
3307 impossible for them to conflict with names written by users. */
3308 { "__ct ", &ctor_identifier, 1 },
3309 { "__base_ctor ", &base_ctor_identifier, 1 },
3310 { "__comp_ctor ", &complete_ctor_identifier, 1 },
3311 { "__dt ", &dtor_identifier, 1 },
3312 { "__comp_dtor ", &complete_dtor_identifier, 1 },
3313 { "__base_dtor ", &base_dtor_identifier, 1 },
3314 { "__deleting_dtor ", &deleting_dtor_identifier, 1 },
3315 { IN_CHARGE_NAME, &in_charge_identifier, 0 },
3316 { "nelts", &nelts_identifier, 0 },
3317 { THIS_NAME, &this_identifier, 0 },
3318 { VTABLE_DELTA_NAME, &delta_identifier, 0 },
3319 { VTABLE_PFN_NAME, &pfn_identifier, 0 },
3320 { "_vptr", &vptr_identifier, 0 },
3321 { "__vtt_parm", &vtt_parm_identifier, 0 },
3322 { "::", &global_scope_name, 0 },
3323 { "std", &std_identifier, 0 },
3327 for (pid = predefined_identifiers; pid->name; ++pid)
3329 *pid->node = get_identifier (pid->name);
3330 if (pid->ctor_or_dtor_p)
3331 IDENTIFIER_CTOR_OR_DTOR_P (*pid->node) = 1;
3335 /* Create the predefined scalar types of C,
3336 and some nodes representing standard constants (0, 1, (void *)0).
3337 Initialize the global binding level.
3338 Make definitions for built-in primitive functions. */
3341 cxx_init_decl_processing (void)
3344 tree void_ftype_ptr;
3346 build_common_tree_nodes (flag_signed_char, false);
3348 /* Create all the identifiers we need. */
3349 initialize_predefined_identifiers ();
3351 /* Create the global variables. */
3352 push_to_top_level ();
3354 current_function_decl = NULL_TREE;
3355 current_binding_level = NULL;
3356 /* Enter the global namespace. */
3357 gcc_assert (global_namespace == NULL_TREE);
3358 global_namespace = build_lang_decl (NAMESPACE_DECL, global_scope_name,
3360 TREE_PUBLIC (global_namespace) = 1;
3361 begin_scope (sk_namespace, global_namespace);
3363 current_lang_name = NULL_TREE;
3365 if (flag_visibility_ms_compat)
3366 default_visibility = VISIBILITY_HIDDEN;
3369 current_lang_name = lang_name_c;
3371 /* Create the `std' namespace. */
3372 push_namespace (std_identifier);
3373 std_node = current_namespace;
3376 c_common_nodes_and_builtins ();
3378 java_byte_type_node = record_builtin_java_type ("__java_byte", 8);
3379 java_short_type_node = record_builtin_java_type ("__java_short", 16);
3380 java_int_type_node = record_builtin_java_type ("__java_int", 32);
3381 java_long_type_node = record_builtin_java_type ("__java_long", 64);
3382 java_float_type_node = record_builtin_java_type ("__java_float", -32);
3383 java_double_type_node = record_builtin_java_type ("__java_double", -64);
3384 java_char_type_node = record_builtin_java_type ("__java_char", -16);
3385 java_boolean_type_node = record_builtin_java_type ("__java_boolean", -1);
3387 integer_two_node = build_int_cst (NULL_TREE, 2);
3388 integer_three_node = build_int_cst (NULL_TREE, 3);
3390 record_builtin_type (RID_BOOL, "bool", boolean_type_node);
3391 truthvalue_type_node = boolean_type_node;
3392 truthvalue_false_node = boolean_false_node;
3393 truthvalue_true_node = boolean_true_node;
3395 empty_except_spec = build_tree_list (NULL_TREE, NULL_TREE);
3398 record_builtin_type (RID_MAX, NULL, string_type_node);
3401 delta_type_node = ptrdiff_type_node;
3402 vtable_index_type = ptrdiff_type_node;
3404 vtt_parm_type = build_pointer_type (const_ptr_type_node);
3405 void_ftype = build_function_type (void_type_node, void_list_node);
3406 void_ftype_ptr = build_function_type (void_type_node,
3407 tree_cons (NULL_TREE,
3411 = build_exception_variant (void_ftype_ptr, empty_except_spec);
3413 /* C++ extensions */
3415 unknown_type_node = make_node (UNKNOWN_TYPE);
3416 record_unknown_type (unknown_type_node, "unknown type");
3418 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
3419 TREE_TYPE (unknown_type_node) = unknown_type_node;
3421 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
3423 TYPE_POINTER_TO (unknown_type_node) = unknown_type_node;
3424 TYPE_REFERENCE_TO (unknown_type_node) = unknown_type_node;
3426 init_list_type_node = make_node (UNKNOWN_TYPE);
3427 record_unknown_type (init_list_type_node, "init list");
3430 /* Make sure we get a unique function type, so we can give
3431 its pointer type a name. (This wins for gdb.) */
3432 tree vfunc_type = make_node (FUNCTION_TYPE);
3433 TREE_TYPE (vfunc_type) = integer_type_node;
3434 TYPE_ARG_TYPES (vfunc_type) = NULL_TREE;
3435 layout_type (vfunc_type);
3437 vtable_entry_type = build_pointer_type (vfunc_type);
3439 record_builtin_type (RID_MAX, VTBL_PTR_TYPE, vtable_entry_type);
3442 = build_cplus_array_type (vtable_entry_type, NULL_TREE);
3443 layout_type (vtbl_type_node);
3444 vtbl_type_node = build_qualified_type (vtbl_type_node, TYPE_QUAL_CONST);
3445 record_builtin_type (RID_MAX, NULL, vtbl_type_node);
3446 vtbl_ptr_type_node = build_pointer_type (vtable_entry_type);
3447 layout_type (vtbl_ptr_type_node);
3448 record_builtin_type (RID_MAX, NULL, vtbl_ptr_type_node);
3450 push_namespace (get_identifier ("__cxxabiv1"));
3451 abi_node = current_namespace;
3454 global_type_node = make_node (LANG_TYPE);
3455 record_unknown_type (global_type_node, "global type");
3458 current_lang_name = lang_name_cplusplus;
3462 tree bad_alloc_type_node;
3463 tree bad_alloc_decl;
3464 tree newtype, deltype;
3465 tree ptr_ftype_sizetype;
3467 push_namespace (std_identifier);
3468 bad_alloc_id = get_identifier ("bad_alloc");
3469 bad_alloc_type_node = make_class_type (RECORD_TYPE);
3470 TYPE_CONTEXT (bad_alloc_type_node) = current_namespace;
3472 = create_implicit_typedef (bad_alloc_id, bad_alloc_type_node);
3473 DECL_CONTEXT (bad_alloc_decl) = current_namespace;
3477 = build_function_type (ptr_type_node,
3478 tree_cons (NULL_TREE,
3481 newtype = build_exception_variant
3482 (ptr_ftype_sizetype, add_exception_specifier
3483 (NULL_TREE, bad_alloc_type_node, -1));
3484 deltype = build_exception_variant (void_ftype_ptr, empty_except_spec);
3485 push_cp_library_fn (NEW_EXPR, newtype);
3486 push_cp_library_fn (VEC_NEW_EXPR, newtype);
3487 global_delete_fndecl = push_cp_library_fn (DELETE_EXPR, deltype);
3488 push_cp_library_fn (VEC_DELETE_EXPR, deltype);
3492 = build_library_fn_ptr ("__cxa_pure_virtual", void_ftype);
3494 /* Perform other language dependent initializations. */
3495 init_class_processing ();
3496 init_rtti_processing ();
3497 init_template_processing ();
3499 if (flag_exceptions)
3500 init_exception_processing ();
3502 if (! supports_one_only ())
3505 make_fname_decl = cp_make_fname_decl;
3506 start_fname_decls ();
3508 /* Show we use EH for cleanups. */
3509 if (flag_exceptions)
3510 using_eh_for_cleanups ();
3513 /* Generate an initializer for a function naming variable from
3514 NAME. NAME may be NULL, to indicate a dependent name. TYPE_P is
3515 filled in with the type of the init. */
3518 cp_fname_init (const char* name, tree *type_p)
3520 tree domain = NULL_TREE;
3522 tree init = NULL_TREE;
3527 length = strlen (name);
3528 domain = build_index_type (size_int (length));
3529 init = build_string (length + 1, name);
3532 type = build_qualified_type (char_type_node, TYPE_QUAL_CONST);
3533 type = build_cplus_array_type (type, domain);
3538 TREE_TYPE (init) = type;
3540 init = error_mark_node;
3545 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give
3546 the decl, LOC is the location to give the decl, NAME is the
3547 initialization string and TYPE_DEP indicates whether NAME depended
3548 on the type of the function. We make use of that to detect
3549 __PRETTY_FUNCTION__ inside a template fn. This is being done lazily
3550 at the point of first use, so we mustn't push the decl now. */
3553 cp_make_fname_decl (location_t loc, tree id, int type_dep)
3555 const char *const name = (type_dep && processing_template_decl
3556 ? NULL : fname_as_string (type_dep));
3558 tree init = cp_fname_init (name, &type);
3559 tree decl = build_decl (loc, VAR_DECL, id, type);
3562 free (CONST_CAST (char *, name));
3564 /* As we're using pushdecl_with_scope, we must set the context. */
3565 DECL_CONTEXT (decl) = current_function_decl;
3566 DECL_PRETTY_FUNCTION_P (decl) = type_dep;
3568 TREE_STATIC (decl) = 1;
3569 TREE_READONLY (decl) = 1;
3570 DECL_ARTIFICIAL (decl) = 1;
3572 TREE_USED (decl) = 1;
3574 if (current_function_decl)
3576 struct cp_binding_level *b = current_binding_level;
3577 while (b->level_chain->kind != sk_function_parms)
3579 pushdecl_with_scope (decl, b, /*is_friend=*/false);
3580 cp_finish_decl (decl, init, /*init_const_expr_p=*/false, NULL_TREE,
3581 LOOKUP_ONLYCONVERTING);
3584 pushdecl_top_level_and_finish (decl, init);
3590 builtin_function_1 (tree decl, tree context, bool is_global)
3592 tree id = DECL_NAME (decl);
3593 const char *name = IDENTIFIER_POINTER (id);
3595 retrofit_lang_decl (decl);
3597 DECL_ARTIFICIAL (decl) = 1;
3598 SET_OVERLOADED_OPERATOR_CODE (decl, ERROR_MARK);
3599 SET_DECL_LANGUAGE (decl, lang_c);
3600 /* Runtime library routines are, by definition, available in an
3601 external shared object. */
3602 DECL_VISIBILITY (decl) = VISIBILITY_DEFAULT;
3603 DECL_VISIBILITY_SPECIFIED (decl) = 1;
3605 DECL_CONTEXT (decl) = context;
3608 pushdecl_top_level (decl);
3612 /* A function in the user's namespace should have an explicit
3613 declaration before it is used. Mark the built-in function as
3614 anticipated but not actually declared. */
3615 if (name[0] != '_' || name[1] != '_')
3616 DECL_ANTICIPATED (decl) = 1;
3617 else if (strncmp (name + 2, "builtin_", strlen ("builtin_")) != 0)
3619 size_t len = strlen (name);
3621 /* Treat __*_chk fortification functions as anticipated as well,
3622 unless they are __builtin_*. */
3623 if (len > strlen ("___chk")
3624 && memcmp (name + len - strlen ("_chk"),
3625 "_chk", strlen ("_chk") + 1) == 0)
3626 DECL_ANTICIPATED (decl) = 1;
3633 cxx_builtin_function (tree decl)
3635 tree id = DECL_NAME (decl);
3636 const char *name = IDENTIFIER_POINTER (id);
3637 /* All builtins that don't begin with an '_' should additionally
3638 go in the 'std' namespace. */
3641 tree decl2 = copy_node(decl);
3642 push_namespace (std_identifier);
3643 builtin_function_1 (decl2, std_node, false);
3647 return builtin_function_1 (decl, NULL_TREE, false);
3650 /* Like cxx_builtin_function, but guarantee the function is added to the global
3651 scope. This is to allow function specific options to add new machine
3652 dependent builtins when the target ISA changes via attribute((target(...)))
3653 which saves space on program startup if the program does not use non-generic
3657 cxx_builtin_function_ext_scope (tree decl)
3660 tree id = DECL_NAME (decl);
3661 const char *name = IDENTIFIER_POINTER (id);
3662 /* All builtins that don't begin with an '_' should additionally
3663 go in the 'std' namespace. */
3666 tree decl2 = copy_node(decl);
3667 push_namespace (std_identifier);
3668 builtin_function_1 (decl2, std_node, true);
3672 return builtin_function_1 (decl, NULL_TREE, true);
3675 /* Generate a FUNCTION_DECL with the typical flags for a runtime library
3676 function. Not called directly. */
3679 build_library_fn_1 (tree name, enum tree_code operator_code, tree type)
3681 tree fn = build_lang_decl (FUNCTION_DECL, name, type);
3682 DECL_EXTERNAL (fn) = 1;
3683 TREE_PUBLIC (fn) = 1;
3684 DECL_ARTIFICIAL (fn) = 1;
3685 SET_OVERLOADED_OPERATOR_CODE (fn, operator_code);
3686 SET_DECL_LANGUAGE (fn, lang_c);
3687 /* Runtime library routines are, by definition, available in an
3688 external shared object. */
3689 DECL_VISIBILITY (fn) = VISIBILITY_DEFAULT;
3690 DECL_VISIBILITY_SPECIFIED (fn) = 1;
3694 /* Returns the _DECL for a library function with C linkage.
3695 We assume that such functions never throw; if this is incorrect,
3696 callers should unset TREE_NOTHROW. */
3699 build_library_fn (tree name, tree type)
3701 tree fn = build_library_fn_1 (name, ERROR_MARK, type);
3702 TREE_NOTHROW (fn) = 1;
3706 /* Returns the _DECL for a library function with C++ linkage. */
3709 build_cp_library_fn (tree name, enum tree_code operator_code, tree type)
3711 tree fn = build_library_fn_1 (name, operator_code, type);
3712 TREE_NOTHROW (fn) = TYPE_NOTHROW_P (type);
3713 DECL_CONTEXT (fn) = FROB_CONTEXT (current_namespace);
3714 SET_DECL_LANGUAGE (fn, lang_cplusplus);
3718 /* Like build_library_fn, but takes a C string instead of an
3722 build_library_fn_ptr (const char* name, tree type)
3724 return build_library_fn (get_identifier (name), type);
3727 /* Like build_cp_library_fn, but takes a C string instead of an
3731 build_cp_library_fn_ptr (const char* name, tree type)
3733 return build_cp_library_fn (get_identifier (name), ERROR_MARK, type);
3736 /* Like build_library_fn, but also pushes the function so that we will
3737 be able to find it via IDENTIFIER_GLOBAL_VALUE. Also, the function
3738 may throw exceptions listed in RAISES. */
3741 push_library_fn (tree name, tree type, tree raises)
3746 type = build_exception_variant (type, raises);
3748 fn = build_library_fn (name, type);
3749 pushdecl_top_level (fn);
3753 /* Like build_cp_library_fn, but also pushes the function so that it
3754 will be found by normal lookup. */
3757 push_cp_library_fn (enum tree_code operator_code, tree type)
3759 tree fn = build_cp_library_fn (ansi_opname (operator_code),
3766 /* Like push_library_fn, but takes a TREE_LIST of parm types rather than
3770 push_void_library_fn (tree name, tree parmtypes)
3772 tree type = build_function_type (void_type_node, parmtypes);
3773 return push_library_fn (name, type, NULL_TREE);
3776 /* Like push_library_fn, but also note that this function throws
3777 and does not return. Used for __throw_foo and the like. */
3780 push_throw_library_fn (tree name, tree type)
3782 tree fn = push_library_fn (name, type, NULL_TREE);
3783 TREE_THIS_VOLATILE (fn) = 1;
3784 TREE_NOTHROW (fn) = 0;
3788 /* When we call finish_struct for an anonymous union, we create
3789 default copy constructors and such. But, an anonymous union
3790 shouldn't have such things; this function undoes the damage to the
3791 anonymous union type T.
3793 (The reason that we create the synthesized methods is that we don't
3794 distinguish `union { int i; }' from `typedef union { int i; } U'.
3795 The first is an anonymous union; the second is just an ordinary
3799 fixup_anonymous_aggr (tree t)
3803 /* Wipe out memory of synthesized methods. */
3804 TYPE_HAS_USER_CONSTRUCTOR (t) = 0;
3805 TYPE_HAS_DEFAULT_CONSTRUCTOR (t) = 0;
3806 TYPE_HAS_INIT_REF (t) = 0;
3807 TYPE_HAS_CONST_INIT_REF (t) = 0;
3808 TYPE_HAS_ASSIGN_REF (t) = 0;
3809 TYPE_HAS_CONST_ASSIGN_REF (t) = 0;
3811 /* Splice the implicitly generated functions out of the TYPE_METHODS
3813 q = &TYPE_METHODS (t);
3816 if (DECL_ARTIFICIAL (*q))
3817 *q = TREE_CHAIN (*q);
3819 q = &TREE_CHAIN (*q);
3822 /* ISO C++ 9.5.3. Anonymous unions may not have function members. */
3823 if (TYPE_METHODS (t))
3825 tree decl = TYPE_MAIN_DECL (t);
3827 if (TREE_CODE (t) != UNION_TYPE)
3828 error_at (DECL_SOURCE_LOCATION (decl),
3829 "an anonymous struct cannot have function members");
3831 error_at (DECL_SOURCE_LOCATION (decl),
3832 "an anonymous union cannot have function members");
3835 /* Anonymous aggregates cannot have fields with ctors, dtors or complex
3836 assignment operators (because they cannot have these methods themselves).
3837 For anonymous unions this is already checked because they are not allowed
3838 in any union, otherwise we have to check it. */
3839 if (TREE_CODE (t) != UNION_TYPE)
3843 for (field = TYPE_FIELDS (t); field; field = TREE_CHAIN (field))
3844 if (TREE_CODE (field) == FIELD_DECL)
3846 type = TREE_TYPE (field);
3847 if (CLASS_TYPE_P (type))
3849 if (TYPE_NEEDS_CONSTRUCTING (type))
3850 error ("member %q+#D with constructor not allowed "
3851 "in anonymous aggregate", field);
3852 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
3853 error ("member %q+#D with destructor not allowed "
3854 "in anonymous aggregate", field);
3855 if (TYPE_HAS_COMPLEX_ASSIGN_REF (type))
3856 error ("member %q+#D with copy assignment operator "
3857 "not allowed in anonymous aggregate", field);
3863 /* Make sure that a declaration with no declarator is well-formed, i.e.
3864 just declares a tagged type or anonymous union.
3866 Returns the type declared; or NULL_TREE if none. */
3869 check_tag_decl (cp_decl_specifier_seq *declspecs)
3871 int saw_friend = declspecs->specs[(int)ds_friend] != 0;
3872 int saw_typedef = declspecs->specs[(int)ds_typedef] != 0;
3873 /* If a class, struct, or enum type is declared by the DECLSPECS
3874 (i.e, if a class-specifier, enum-specifier, or non-typename
3875 elaborated-type-specifier appears in the DECLSPECS),
3876 DECLARED_TYPE is set to the corresponding type. */
3877 tree declared_type = NULL_TREE;
3878 bool error_p = false;
3880 if (declspecs->multiple_types_p)
3881 error ("multiple types in one declaration");
3882 else if (declspecs->redefined_builtin_type)
3884 if (!in_system_header)
3885 permerror (input_location, "redeclaration of C++ built-in type %qT",
3886 declspecs->redefined_builtin_type);
3891 && TYPE_P (declspecs->type)
3892 && ((TREE_CODE (declspecs->type) != TYPENAME_TYPE
3893 && MAYBE_CLASS_TYPE_P (declspecs->type))
3894 || TREE_CODE (declspecs->type) == ENUMERAL_TYPE))
3895 declared_type = declspecs->type;
3896 else if (declspecs->type == error_mark_node)
3898 if (declared_type == NULL_TREE && ! saw_friend && !error_p)
3899 permerror (input_location, "declaration does not declare anything");
3900 /* Check for an anonymous union. */
3901 else if (declared_type && RECORD_OR_UNION_CODE_P (TREE_CODE (declared_type))
3902 && TYPE_ANONYMOUS_P (declared_type))
3904 /* 7/3 In a simple-declaration, the optional init-declarator-list
3905 can be omitted only when declaring a class (clause 9) or
3906 enumeration (7.2), that is, when the decl-specifier-seq contains
3907 either a class-specifier, an elaborated-type-specifier with
3908 a class-key (9.1), or an enum-specifier. In these cases and
3909 whenever a class-specifier or enum-specifier is present in the
3910 decl-specifier-seq, the identifiers in these specifiers are among
3911 the names being declared by the declaration (as class-name,
3912 enum-names, or enumerators, depending on the syntax). In such
3913 cases, and except for the declaration of an unnamed bit-field (9.6),
3914 the decl-specifier-seq shall introduce one or more names into the
3915 program, or shall redeclare a name introduced by a previous
3916 declaration. [Example:
3917 enum { }; // ill-formed
3918 typedef class { }; // ill-formed
3922 error ("missing type-name in typedef-declaration");
3925 /* Anonymous unions are objects, so they can have specifiers. */;
3926 SET_ANON_AGGR_TYPE_P (declared_type);
3928 if (TREE_CODE (declared_type) != UNION_TYPE && !in_system_header)
3929 pedwarn (input_location, OPT_pedantic, "ISO C++ prohibits anonymous structs");
3934 if (declspecs->specs[(int)ds_inline]
3935 || declspecs->specs[(int)ds_virtual])
3936 error ("%qs can only be specified for functions",
3937 declspecs->specs[(int)ds_inline]
3938 ? "inline" : "virtual");
3940 && (!current_class_type
3941 || current_scope () != current_class_type))
3942 error ("%<friend%> can only be specified inside a class");
3943 else if (declspecs->specs[(int)ds_explicit])
3944 error ("%<explicit%> can only be specified for constructors");
3945 else if (declspecs->storage_class)
3946 error ("a storage class can only be specified for objects "
3948 else if (declspecs->specs[(int)ds_const]
3949 || declspecs->specs[(int)ds_volatile]
3950 || declspecs->specs[(int)ds_restrict]
3951 || declspecs->specs[(int)ds_thread])
3952 error ("qualifiers can only be specified for objects "
3954 else if (saw_typedef)
3955 warning (0, "%<typedef%> was ignored in this declaration");
3956 else if (declspecs->specs[(int) ds_constexpr])
3957 error ("%<constexpr> cannot be used for type declarations");
3960 return declared_type;
3963 /* Called when a declaration is seen that contains no names to declare.
3964 If its type is a reference to a structure, union or enum inherited
3965 from a containing scope, shadow that tag name for the current scope
3966 with a forward reference.
3967 If its type defines a new named structure or union
3968 or defines an enum, it is valid but we need not do anything here.
3969 Otherwise, it is an error.
3971 C++: may have to grok the declspecs to learn about static,
3972 complain for anonymous unions.
3974 Returns the TYPE declared -- or NULL_TREE if none. */
3977 shadow_tag (cp_decl_specifier_seq *declspecs)
3979 tree t = check_tag_decl (declspecs);
3984 if (declspecs->attributes)
3986 warning (0, "attribute ignored in declaration of %q+#T", t);
3987 warning (0, "attribute for %q+#T must follow the %qs keyword",
3988 t, class_key_or_enum_as_string (t));
3992 if (maybe_process_partial_specialization (t) == error_mark_node)
3995 /* This is where the variables in an anonymous union are
3996 declared. An anonymous union declaration looks like:
3998 because there is no declarator after the union, the parser
3999 sends that declaration here. */
4000 if (ANON_AGGR_TYPE_P (t))
4002 fixup_anonymous_aggr (t);
4004 if (TYPE_FIELDS (t))
4006 tree decl = grokdeclarator (/*declarator=*/NULL,
4007 declspecs, NORMAL, 0, NULL);
4008 finish_anon_union (decl);
4015 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
4018 groktypename (cp_decl_specifier_seq *type_specifiers,
4019 const cp_declarator *declarator,
4020 bool is_template_arg)
4024 enum decl_context context
4025 = is_template_arg ? TEMPLATE_TYPE_ARG : TYPENAME;
4026 attrs = type_specifiers->attributes;
4027 type_specifiers->attributes = NULL_TREE;
4028 type = grokdeclarator (declarator, type_specifiers, context, 0, &attrs);
4029 if (attrs && type != error_mark_node)
4031 if (CLASS_TYPE_P (type))
4032 warning (OPT_Wattributes, "ignoring attributes applied to class type %qT "
4033 "outside of definition", type);
4034 else if (MAYBE_CLASS_TYPE_P (type))
4035 /* A template type parameter or other dependent type. */
4036 warning (OPT_Wattributes, "ignoring attributes applied to dependent "
4037 "type %qT without an associated declaration", type);
4039 cplus_decl_attributes (&type, attrs, 0);
4044 /* Process a DECLARATOR for a function-scope variable declaration,
4045 namespace-scope variable declaration, or function declaration.
4046 (Function definitions go through start_function; class member
4047 declarations appearing in the body of the class go through
4048 grokfield.) The DECL corresponding to the DECLARATOR is returned.
4049 If an error occurs, the error_mark_node is returned instead.
4051 DECLSPECS are the decl-specifiers for the declaration. INITIALIZED is
4052 SD_INITIALIZED if an explicit initializer is present, or SD_DEFAULTED
4053 for an explicitly defaulted function, or SD_DELETED for an explicitly
4054 deleted function, but 0 (SD_UNINITIALIZED) if this is a variable
4055 implicitly initialized via a default constructor. ATTRIBUTES and
4056 PREFIX_ATTRIBUTES are GNU attributes associated with this declaration.
4057 *PUSHED_SCOPE_P is set to the scope entered in this function, if any; if
4058 set, the caller is responsible for calling pop_scope. */
4061 start_decl (const cp_declarator *declarator,
4062 cp_decl_specifier_seq *declspecs,
4065 tree prefix_attributes,
4066 tree *pushed_scope_p)
4074 *pushed_scope_p = NULL_TREE;
4076 /* An object declared as __attribute__((deprecated)) suppresses
4077 warnings of uses of other deprecated items. */
4078 if (lookup_attribute ("deprecated", attributes))
4079 deprecated_state = DEPRECATED_SUPPRESS;
4081 attributes = chainon (attributes, prefix_attributes);
4083 decl = grokdeclarator (declarator, declspecs, NORMAL, initialized,
4086 deprecated_state = DEPRECATED_NORMAL;
4088 if (decl == NULL_TREE || TREE_CODE (decl) == VOID_TYPE
4089 || decl == error_mark_node)
4090 return error_mark_node;
4092 type = TREE_TYPE (decl);
4094 context = DECL_CONTEXT (decl);
4098 *pushed_scope_p = push_scope (context);
4100 /* We are only interested in class contexts, later. */
4101 if (TREE_CODE (context) == NAMESPACE_DECL)
4102 context = NULL_TREE;
4106 /* Is it valid for this decl to have an initializer at all?
4107 If not, set INITIALIZED to zero, which will indirectly
4108 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
4109 switch (TREE_CODE (decl))
4112 error ("typedef %qD is initialized (use decltype instead)", decl);
4113 return error_mark_node;
4116 if (initialized == SD_DELETED)
4117 /* We'll handle the rest of the semantics later, but we need to
4118 set this now so it's visible to duplicate_decls. */
4119 DECL_DELETED_FN (decl) = 1;
4128 if (! toplevel_bindings_p ()
4129 && DECL_EXTERNAL (decl))
4130 warning (0, "declaration of %q#D has %<extern%> and is initialized",
4132 DECL_EXTERNAL (decl) = 0;
4133 if (toplevel_bindings_p ())
4134 TREE_STATIC (decl) = 1;
4137 /* If this is a typedef that names the class for linkage purposes
4138 (7.1.3p8), apply any attributes directly to the type. */
4139 if (TREE_CODE (decl) == TYPE_DECL
4140 && TAGGED_TYPE_P (TREE_TYPE (decl))
4141 && decl == TYPE_NAME (TYPE_MAIN_VARIANT (TREE_TYPE (decl))))
4142 flags = ATTR_FLAG_TYPE_IN_PLACE;
4146 /* Set attributes here so if duplicate decl, will have proper attributes. */
4147 cplus_decl_attributes (&decl, attributes, flags);
4149 /* Dllimported symbols cannot be defined. Static data members (which
4150 can be initialized in-class and dllimported) go through grokfield,
4151 not here, so we don't need to exclude those decls when checking for
4153 if (initialized && DECL_DLLIMPORT_P (decl))
4155 error ("definition of %q#D is marked %<dllimport%>", decl);
4156 DECL_DLLIMPORT_P (decl) = 0;
4159 /* If #pragma weak was used, mark the decl weak now. */
4160 maybe_apply_pragma_weak (decl);
4162 if (TREE_CODE (decl) == FUNCTION_DECL
4163 && DECL_DECLARED_INLINE_P (decl)
4164 && DECL_UNINLINABLE (decl)
4165 && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl)))
4166 warning (0, "inline function %q+D given attribute noinline", decl);
4168 if (context && COMPLETE_TYPE_P (complete_type (context)))
4170 if (TREE_CODE (decl) == VAR_DECL)
4172 tree field = lookup_field (context, DECL_NAME (decl), 0, false);
4173 if (field == NULL_TREE || TREE_CODE (field) != VAR_DECL)
4174 error ("%q#D is not a static member of %q#T", decl, context);
4177 if (DECL_CONTEXT (field) != context)
4179 if (!same_type_p (DECL_CONTEXT (field), context))
4180 permerror (input_location, "ISO C++ does not permit %<%T::%D%> "
4181 "to be defined as %<%T::%D%>",
4182 DECL_CONTEXT (field), DECL_NAME (decl),
4183 context, DECL_NAME (decl));
4184 DECL_CONTEXT (decl) = DECL_CONTEXT (field);
4186 if (processing_specialization
4187 && template_class_depth (context) == 0
4188 && CLASSTYPE_TEMPLATE_SPECIALIZATION (context))
4189 error ("template header not allowed in member definition "
4190 "of explicitly specialized class");
4191 /* Static data member are tricky; an in-class initialization
4192 still doesn't provide a definition, so the in-class
4193 declaration will have DECL_EXTERNAL set, but will have an
4194 initialization. Thus, duplicate_decls won't warn
4195 about this situation, and so we check here. */
4196 if (initialized && DECL_INITIALIZED_IN_CLASS_P (field))
4197 error ("duplicate initialization of %qD", decl);
4198 if (duplicate_decls (decl, field, /*newdecl_is_friend=*/false))
4200 if (declspecs->specs[(int) ds_constexpr]
4201 && !DECL_DECLARED_CONSTEXPR_P (field))
4202 error ("%qD declared %<constexpr%> outside its class", field);
4207 tree field = check_classfn (context, decl,
4208 (processing_template_decl
4209 > template_class_depth (context))
4210 ? current_template_parms
4212 if (field && field != error_mark_node
4213 && duplicate_decls (decl, field,
4214 /*newdecl_is_friend=*/false))
4218 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
4219 DECL_IN_AGGR_P (decl) = 0;
4220 /* Do not mark DECL as an explicit specialization if it was not
4221 already marked as an instantiation; a declaration should
4222 never be marked as a specialization unless we know what
4223 template is being specialized. */
4224 if (DECL_LANG_SPECIFIC (decl) && DECL_USE_TEMPLATE (decl))
4226 SET_DECL_TEMPLATE_SPECIALIZATION (decl);
4228 /* [temp.expl.spec] An explicit specialization of a static data
4229 member of a template is a definition if the declaration
4230 includes an initializer; otherwise, it is a declaration.
4232 We check for processing_specialization so this only applies
4233 to the new specialization syntax. */
4234 if (!initialized && processing_specialization)
4235 DECL_EXTERNAL (decl) = 1;
4238 if (DECL_EXTERNAL (decl) && ! DECL_TEMPLATE_SPECIALIZATION (decl))
4239 permerror (input_location, "declaration of %q#D outside of class is not definition",
4242 if (!ensure_literal_type_for_constexpr_object (decl))
4243 return error_mark_node;
4246 was_public = TREE_PUBLIC (decl);
4248 /* Enter this declaration into the symbol table. */
4249 decl = maybe_push_decl (decl);
4251 if (processing_template_decl)
4252 decl = push_template_decl (decl);
4253 if (decl == error_mark_node)
4254 return error_mark_node;
4256 /* Tell the back end to use or not use .common as appropriate. If we say
4257 -fconserve-space, we want this to save .data space, at the expense of
4258 wrong semantics. If we say -fno-conserve-space, we want this to
4259 produce errors about redefs; to do this we force variables into the
4261 if (flag_conserve_space
4262 && TREE_CODE (decl) == VAR_DECL
4263 && TREE_PUBLIC (decl)
4264 && !DECL_THREAD_LOCAL_P (decl)
4265 && !have_global_bss_p ())
4266 DECL_COMMON (decl) = 1;
4268 if (TREE_CODE (decl) == VAR_DECL
4269 && DECL_NAMESPACE_SCOPE_P (decl) && !TREE_PUBLIC (decl) && !was_public
4270 && !DECL_THIS_STATIC (decl) && !DECL_ARTIFICIAL (decl))
4272 /* This is a const variable with implicit 'static'. Set
4273 DECL_THIS_STATIC so we can tell it from variables that are
4274 !TREE_PUBLIC because of the anonymous namespace. */
4275 gcc_assert (cp_type_readonly (TREE_TYPE (decl)));
4276 DECL_THIS_STATIC (decl) = 1;
4279 if (!processing_template_decl && TREE_CODE (decl) == VAR_DECL)
4280 start_decl_1 (decl, initialized);
4285 /* Process the declaration of a variable DECL. INITIALIZED is true
4286 iff DECL is explicitly initialized. (INITIALIZED is false if the
4287 variable is initialized via an implicitly-called constructor.)
4288 This function must be called for ordinary variables (including, for
4289 example, implicit instantiations of templates), but must not be
4290 called for template declarations. */
4293 start_decl_1 (tree decl, bool initialized)
4297 bool aggregate_definition_p;
4299 gcc_assert (!processing_template_decl);
4301 if (error_operand_p (decl))
4304 gcc_assert (TREE_CODE (decl) == VAR_DECL);
4306 type = TREE_TYPE (decl);
4307 complete_p = COMPLETE_TYPE_P (type);
4308 aggregate_definition_p = MAYBE_CLASS_TYPE_P (type) && !DECL_EXTERNAL (decl);
4310 /* If an explicit initializer is present, or if this is a definition
4311 of an aggregate, then we need a complete type at this point.
4312 (Scalars are always complete types, so there is nothing to
4313 check.) This code just sets COMPLETE_P; errors (if necessary)
4314 are issued below. */
4315 if ((initialized || aggregate_definition_p)
4317 && COMPLETE_TYPE_P (complete_type (type)))
4320 /* We will not yet have set TREE_READONLY on DECL if the type
4321 was "const", but incomplete, before this point. But, now, we
4322 have a complete type, so we can try again. */
4323 cp_apply_type_quals_to_decl (cp_type_quals (type), decl);
4327 /* Is it valid for this decl to have an initializer at all? */
4329 /* Don't allow initializations for incomplete types except for
4330 arrays which might be completed by the initialization. */
4332 ; /* A complete type is ok. */
4333 else if (type_uses_auto (type))
4334 ; /* An auto type is ok. */
4335 else if (TREE_CODE (type) != ARRAY_TYPE)
4337 error ("variable %q#D has initializer but incomplete type", decl);
4338 type = TREE_TYPE (decl) = error_mark_node;
4340 else if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (type))))
4342 if (DECL_LANG_SPECIFIC (decl) && DECL_TEMPLATE_INFO (decl))
4343 error ("elements of array %q#D have incomplete type", decl);
4344 /* else we already gave an error in start_decl. */
4347 else if (aggregate_definition_p && !complete_p)
4349 if (type_uses_auto (type))
4350 error ("declaration of %q#D has no initializer", decl);
4352 error ("aggregate %q#D has incomplete type and cannot be defined",
4354 /* Change the type so that assemble_variable will give
4355 DECL an rtl we can live with: (mem (const_int 0)). */
4356 type = TREE_TYPE (decl) = error_mark_node;
4359 /* Create a new scope to hold this declaration if necessary.
4360 Whether or not a new scope is necessary cannot be determined
4361 until after the type has been completed; if the type is a
4362 specialization of a class template it is not until after
4363 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
4364 will be set correctly. */
4365 maybe_push_cleanup_level (type);
4368 /* Handle initialization of references. DECL, TYPE, and INIT have the
4369 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
4370 but will be set to a new CLEANUP_STMT if a temporary is created
4371 that must be destroyed subsequently.
4373 Returns an initializer expression to use to initialize DECL, or
4374 NULL if the initialization can be performed statically.
4376 Quotes on semantics can be found in ARM 8.4.3. */
4379 grok_reference_init (tree decl, tree type, tree init, tree *cleanup)
4383 if (init == NULL_TREE)
4385 if ((DECL_LANG_SPECIFIC (decl) == 0
4386 || DECL_IN_AGGR_P (decl) == 0)
4387 && ! DECL_THIS_EXTERN (decl))
4388 error ("%qD declared as reference but not initialized", decl);
4392 if (TREE_CODE (init) == TREE_LIST)
4393 init = build_x_compound_expr_from_list (init, "initializer");
4395 if (TREE_CODE (TREE_TYPE (type)) != ARRAY_TYPE
4396 && TREE_CODE (TREE_TYPE (init)) == ARRAY_TYPE)
4397 /* Note: default conversion is only called in very special cases. */
4398 init = decay_conversion (init);
4400 /* Convert INIT to the reference type TYPE. This may involve the
4401 creation of a temporary, whose lifetime must be the same as that
4402 of the reference. If so, a DECL_EXPR for the temporary will be
4403 added just after the DECL_EXPR for DECL. That's why we don't set
4404 DECL_INITIAL for local references (instead assigning to them
4405 explicitly); we need to allow the temporary to be initialized
4407 tmp = initialize_reference (type, init, decl, cleanup, tf_warning_or_error);
4409 if (tmp == error_mark_node)
4411 else if (tmp == NULL_TREE)
4413 error ("cannot initialize %qT from %qT", type, TREE_TYPE (init));
4417 if (TREE_STATIC (decl) && !TREE_CONSTANT (tmp))
4420 DECL_INITIAL (decl) = tmp;
4425 /* Subroutine of check_initializer. We're initializing a DECL of
4426 std::initializer_list<T> TYPE from a braced-init-list INIT, and need to
4427 extend the lifetime of the underlying array to match that of the decl,
4428 just like for reference initialization. CLEANUP is as for
4429 grok_reference_init. */
4432 build_init_list_var_init (tree decl, tree type, tree init, tree *cleanup)
4434 tree aggr_init, array, arrtype;
4435 init = perform_implicit_conversion (type, init, tf_warning_or_error);
4436 if (error_operand_p (init))
4437 return error_mark_node;
4439 aggr_init = TARGET_EXPR_INITIAL (init);
4440 init = build2 (INIT_EXPR, type, decl, init);
4442 array = AGGR_INIT_EXPR_ARG (aggr_init, 1);
4443 arrtype = TREE_TYPE (array);
4445 gcc_assert (TREE_CODE (array) == ADDR_EXPR);
4446 array = TREE_OPERAND (array, 0);
4447 /* If the array is constant, finish_compound_literal already made it a
4448 static variable and we don't need to do anything here. */
4449 if (decl && TREE_CODE (array) == TARGET_EXPR)
4452 tree var = set_up_extended_ref_temp (decl, array, cleanup, &subinit);
4453 var = build_address (var);
4454 var = convert (arrtype, var);
4455 AGGR_INIT_EXPR_ARG (aggr_init, 1) = var;
4456 init = build2 (COMPOUND_EXPR, TREE_TYPE (init), subinit, init);
4461 /* Designated initializers in arrays are not supported in GNU C++.
4462 The parser cannot detect this error since it does not know whether
4463 a given brace-enclosed initializer is for a class type or for an
4464 array. This function checks that CE does not use a designated
4465 initializer. If it does, an error is issued. Returns true if CE
4466 is valid, i.e., does not have a designated initializer. */
4469 check_array_designated_initializer (const constructor_elt *ce)
4471 /* Designated initializers for array elements are not supported. */
4474 /* The parser only allows identifiers as designated
4476 if (ce->index == error_mark_node)
4477 error ("name used in a GNU-style designated "
4478 "initializer for an array");
4481 gcc_assert (TREE_CODE (ce->index) == IDENTIFIER_NODE);
4482 error ("name %qD used in a GNU-style designated "
4483 "initializer for an array", ce->index);
4491 /* When parsing `int a[] = {1, 2};' we don't know the size of the
4492 array until we finish parsing the initializer. If that's the
4493 situation we're in, update DECL accordingly. */
4496 maybe_deduce_size_from_array_init (tree decl, tree init)
4498 tree type = TREE_TYPE (decl);
4500 if (TREE_CODE (type) == ARRAY_TYPE
4501 && TYPE_DOMAIN (type) == NULL_TREE
4502 && TREE_CODE (decl) != TYPE_DECL)
4504 /* do_default is really a C-ism to deal with tentative definitions.
4505 But let's leave it here to ease the eventual merge. */
4506 int do_default = !DECL_EXTERNAL (decl);
4507 tree initializer = init ? init : DECL_INITIAL (decl);
4510 /* Check that there are no designated initializers in INIT, as
4511 those are not supported in GNU C++, and as the middle-end
4512 will crash if presented with a non-numeric designated
4514 if (initializer && TREE_CODE (initializer) == CONSTRUCTOR)
4516 VEC(constructor_elt,gc) *v = CONSTRUCTOR_ELTS (initializer);
4517 constructor_elt *ce;
4520 VEC_iterate (constructor_elt, v, i, ce);
4522 if (!check_array_designated_initializer (ce))
4528 failure = cp_complete_array_type (&TREE_TYPE (decl), initializer,
4532 error ("initializer fails to determine size of %qD", decl);
4533 TREE_TYPE (decl) = error_mark_node;
4535 else if (failure == 2)
4539 error ("array size missing in %qD", decl);
4540 TREE_TYPE (decl) = error_mark_node;
4542 /* If a `static' var's size isn't known, make it extern as
4543 well as static, so it does not get allocated. If it's not
4544 `static', then don't mark it extern; finish_incomplete_decl
4545 will give it a default size and it will get allocated. */
4546 else if (!pedantic && TREE_STATIC (decl) && !TREE_PUBLIC (decl))
4547 DECL_EXTERNAL (decl) = 1;
4549 else if (failure == 3)
4551 error ("zero-size array %qD", decl);
4552 TREE_TYPE (decl) = error_mark_node;
4556 cp_apply_type_quals_to_decl (cp_type_quals (TREE_TYPE (decl)), decl);
4558 relayout_decl (decl);
4562 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
4563 any appropriate error messages regarding the layout. */
4566 layout_var_decl (tree decl)
4570 type = TREE_TYPE (decl);
4571 if (type == error_mark_node)
4574 /* If we haven't already layed out this declaration, do so now.
4575 Note that we must not call complete type for an external object
4576 because it's type might involve templates that we are not
4577 supposed to instantiate yet. (And it's perfectly valid to say
4578 `extern X x' for some incomplete type `X'.) */
4579 if (!DECL_EXTERNAL (decl))
4580 complete_type (type);
4581 if (!DECL_SIZE (decl)
4582 && TREE_TYPE (decl) != error_mark_node
4583 && (COMPLETE_TYPE_P (type)
4584 || (TREE_CODE (type) == ARRAY_TYPE
4585 && !TYPE_DOMAIN (type)
4586 && COMPLETE_TYPE_P (TREE_TYPE (type)))))
4587 layout_decl (decl, 0);
4589 if (!DECL_EXTERNAL (decl) && DECL_SIZE (decl) == NULL_TREE)
4591 /* An automatic variable with an incomplete type: that is an error.
4592 Don't talk about array types here, since we took care of that
4593 message in grokdeclarator. */
4594 error ("storage size of %qD isn't known", decl);
4595 TREE_TYPE (decl) = error_mark_node;
4598 /* Keep this code around in case we later want to control debug info
4599 based on whether a type is "used". (jason 1999-11-11) */
4601 else if (!DECL_EXTERNAL (decl) && MAYBE_CLASS_TYPE_P (ttype))
4602 /* Let debugger know it should output info for this type. */
4603 note_debug_info_needed (ttype);
4605 if (TREE_STATIC (decl) && DECL_CLASS_SCOPE_P (decl))
4606 note_debug_info_needed (DECL_CONTEXT (decl));
4609 if ((DECL_EXTERNAL (decl) || TREE_STATIC (decl))
4610 && DECL_SIZE (decl) != NULL_TREE
4611 && ! TREE_CONSTANT (DECL_SIZE (decl)))
4613 if (TREE_CODE (DECL_SIZE (decl)) == INTEGER_CST)
4614 constant_expression_warning (DECL_SIZE (decl));
4617 error ("storage size of %qD isn't constant", decl);
4618 TREE_TYPE (decl) = error_mark_node;
4623 /* If a local static variable is declared in an inline function, or if
4624 we have a weak definition, we must endeavor to create only one
4625 instance of the variable at link-time. */
4628 maybe_commonize_var (tree decl)
4630 /* Static data in a function with comdat linkage also has comdat
4632 if (TREE_STATIC (decl)
4633 /* Don't mess with __FUNCTION__. */
4634 && ! DECL_ARTIFICIAL (decl)
4635 && DECL_FUNCTION_SCOPE_P (decl)
4636 && vague_linkage_fn_p (DECL_CONTEXT (decl)))
4640 /* With weak symbols, we simply make the variable COMDAT;
4641 that will cause copies in multiple translations units to
4643 comdat_linkage (decl);
4647 if (DECL_INITIAL (decl) == NULL_TREE
4648 || DECL_INITIAL (decl) == error_mark_node)
4650 /* Without weak symbols, we can use COMMON to merge
4651 uninitialized variables. */
4652 TREE_PUBLIC (decl) = 1;
4653 DECL_COMMON (decl) = 1;
4657 /* While for initialized variables, we must use internal
4658 linkage -- which means that multiple copies will not
4660 TREE_PUBLIC (decl) = 0;
4661 DECL_COMMON (decl) = 0;
4662 warning_at (input_location, 0,
4663 "sorry: semantics of inline function static "
4664 "data %q+#D are wrong (you'll wind up "
4665 "with multiple copies)", decl);
4666 warning_at (DECL_SOURCE_LOCATION (decl), 0,
4667 " you can work around this by removing "
4672 else if (DECL_LANG_SPECIFIC (decl) && DECL_COMDAT (decl))
4673 /* Set it up again; we might have set DECL_INITIAL since the last
4675 comdat_linkage (decl);
4678 /* Issue an error message if DECL is an uninitialized const variable. */
4681 check_for_uninitialized_const_var (tree decl)
4683 tree type = TREE_TYPE (decl);
4685 if (TREE_CODE (decl) == VAR_DECL && DECL_DECLARED_CONSTEXPR_P (decl)
4686 && DECL_INITIAL (decl) == NULL)
4687 error ("missing initializer for constexpr %qD", decl);
4689 /* ``Unless explicitly declared extern, a const object does not have
4690 external linkage and must be initialized. ($8.4; $12.1)'' ARM
4692 else if (TREE_CODE (decl) == VAR_DECL
4693 && TREE_CODE (type) != REFERENCE_TYPE
4694 && CP_TYPE_CONST_P (type)
4695 && !TYPE_NEEDS_CONSTRUCTING (type)
4696 && !DECL_INITIAL (decl))
4697 error ("uninitialized const %qD", decl);
4701 /* Structure holding the current initializer being processed by reshape_init.
4702 CUR is a pointer to the current element being processed, END is a pointer
4703 after the last element present in the initializer. */
4704 typedef struct reshape_iterator_t
4706 constructor_elt *cur;
4707 constructor_elt *end;
4710 static tree reshape_init_r (tree, reshape_iter *, bool);
4712 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
4713 returned is the next FIELD_DECL (possibly FIELD itself) that can be
4714 initialized. If there are no more such fields, the return value
4718 next_initializable_field (tree field)
4721 && (TREE_CODE (field) != FIELD_DECL
4722 || (DECL_C_BIT_FIELD (field) && !DECL_NAME (field))
4723 || DECL_ARTIFICIAL (field)))
4724 field = TREE_CHAIN (field);
4729 /* Subroutine of reshape_init_array and reshape_init_vector, which does
4730 the actual work. ELT_TYPE is the element type of the array. MAX_INDEX is an
4731 INTEGER_CST representing the size of the array minus one (the maximum index),
4732 or NULL_TREE if the array was declared without specifying the size. D is
4733 the iterator within the constructor. */
4736 reshape_init_array_1 (tree elt_type, tree max_index, reshape_iter *d)
4739 bool sized_array_p = (max_index != NULL_TREE);
4740 unsigned HOST_WIDE_INT max_index_cst = 0;
4741 unsigned HOST_WIDE_INT index;
4743 /* The initializer for an array is always a CONSTRUCTOR. */
4744 new_init = build_constructor (init_list_type_node, NULL);
4748 /* Minus 1 is used for zero sized arrays. */
4749 if (integer_all_onesp (max_index))
4752 if (host_integerp (max_index, 1))
4753 max_index_cst = tree_low_cst (max_index, 1);
4754 /* sizetype is sign extended, not zero extended. */
4756 max_index_cst = tree_low_cst (fold_convert (size_type_node, max_index),
4760 /* Loop until there are no more initializers. */
4762 d->cur != d->end && (!sized_array_p || index <= max_index_cst);
4767 check_array_designated_initializer (d->cur);
4768 elt_init = reshape_init_r (elt_type, d, /*first_initializer_p=*/false);
4769 if (elt_init == error_mark_node)
4770 return error_mark_node;
4771 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init), NULL_TREE, elt_init);
4777 /* Subroutine of reshape_init_r, processes the initializers for arrays.
4778 Parameters are the same of reshape_init_r. */
4781 reshape_init_array (tree type, reshape_iter *d)
4783 tree max_index = NULL_TREE;
4785 gcc_assert (TREE_CODE (type) == ARRAY_TYPE);
4787 if (TYPE_DOMAIN (type))
4788 max_index = array_type_nelts (type);
4790 return reshape_init_array_1 (TREE_TYPE (type), max_index, d);
4793 /* Subroutine of reshape_init_r, processes the initializers for vectors.
4794 Parameters are the same of reshape_init_r. */
4797 reshape_init_vector (tree type, reshape_iter *d)
4799 tree max_index = NULL_TREE;
4802 gcc_assert (TREE_CODE (type) == VECTOR_TYPE);
4804 if (COMPOUND_LITERAL_P (d->cur->value))
4806 tree value = d->cur->value;
4807 if (!same_type_p (TREE_TYPE (value), type))
4809 error ("invalid type %qT as initializer for a vector of type %qT",
4810 TREE_TYPE (d->cur->value), type);
4811 value = error_mark_node;
4817 /* For a vector, the representation type is a struct
4818 containing a single member which is an array of the
4819 appropriate size. */
4820 rtype = TYPE_DEBUG_REPRESENTATION_TYPE (type);
4821 if (rtype && TYPE_DOMAIN (TREE_TYPE (TYPE_FIELDS (rtype))))
4822 max_index = array_type_nelts (TREE_TYPE (TYPE_FIELDS (rtype)));
4824 return reshape_init_array_1 (TREE_TYPE (type), max_index, d);
4827 /* Subroutine of reshape_init_r, processes the initializers for classes
4828 or union. Parameters are the same of reshape_init_r. */
4831 reshape_init_class (tree type, reshape_iter *d, bool first_initializer_p)
4836 gcc_assert (CLASS_TYPE_P (type));
4838 /* The initializer for a class is always a CONSTRUCTOR. */
4839 new_init = build_constructor (init_list_type_node, NULL);
4840 field = next_initializable_field (TYPE_FIELDS (type));
4846 An initializer for an aggregate member that is an
4847 empty class shall have the form of an empty
4848 initializer-list {}. */
4849 if (!first_initializer_p)
4851 error ("initializer for %qT must be brace-enclosed", type);
4852 return error_mark_node;
4857 /* Loop through the initializable fields, gathering initializers. */
4858 while (d->cur != d->end)
4862 /* Handle designated initializers, as an extension. */
4865 field = lookup_field_1 (type, d->cur->index, /*want_type=*/false);
4867 if (!field || TREE_CODE (field) != FIELD_DECL)
4869 error ("%qT has no non-static data member named %qD", type,
4871 return error_mark_node;
4875 /* If we processed all the member of the class, we are done. */
4879 field_init = reshape_init_r (TREE_TYPE (field), d,
4880 /*first_initializer_p=*/false);
4881 if (field_init == error_mark_node)
4882 return error_mark_node;
4884 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init), field, field_init);
4888 When a union is initialized with a brace-enclosed
4889 initializer, the braces shall only contain an
4890 initializer for the first member of the union. */
4891 if (TREE_CODE (type) == UNION_TYPE)
4894 field = next_initializable_field (TREE_CHAIN (field));
4900 /* Subroutine of reshape_init, which processes a single initializer (part of
4901 a CONSTRUCTOR). TYPE is the type of the variable being initialized, D is the
4902 iterator within the CONSTRUCTOR which points to the initializer to process.
4903 FIRST_INITIALIZER_P is true if this is the first initializer of the
4904 outermost CONSTRUCTOR node. */
4907 reshape_init_r (tree type, reshape_iter *d, bool first_initializer_p)
4909 tree init = d->cur->value;
4911 if (error_operand_p (init))
4912 return error_mark_node;
4914 /* A non-aggregate type is always initialized with a single
4916 if (!CP_AGGREGATE_TYPE_P (type))
4918 /* It is invalid to initialize a non-aggregate type with a
4919 brace-enclosed initializer before C++0x.
4920 We need to check for BRACE_ENCLOSED_INITIALIZER_P here because
4921 of g++.old-deja/g++.mike/p7626.C: a pointer-to-member constant is
4922 a CONSTRUCTOR (with a record type). */
4923 if (TREE_CODE (init) == CONSTRUCTOR
4924 && BRACE_ENCLOSED_INITIALIZER_P (init)) /* p7626.C */
4926 if (SCALAR_TYPE_P (type))
4928 error ("braces around scalar initializer for type %qT", type);
4929 init = error_mark_node;
4932 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS);
4941 All implicit type conversions (clause _conv_) are considered when
4942 initializing the aggregate member with an initializer from an
4943 initializer-list. If the initializer can initialize a member,
4944 the member is initialized. Otherwise, if the member is itself a
4945 non-empty subaggregate, brace elision is assumed and the
4946 initializer is considered for the initialization of the first
4947 member of the subaggregate. */
4948 if (TREE_CODE (init) != CONSTRUCTOR
4949 /* But don't try this for the first initializer, since that would be
4950 looking through the outermost braces; A a2 = { a1 }; is not a
4951 valid aggregate initialization. */
4952 && !first_initializer_p
4953 && (same_type_ignoring_top_level_qualifiers_p (type, TREE_TYPE (init))
4954 || can_convert_arg (type, TREE_TYPE (init), init, LOOKUP_NORMAL)))
4960 /* [dcl.init.string]
4962 A char array (whether plain char, signed char, or unsigned char)
4963 can be initialized by a string-literal (optionally enclosed in
4964 braces); a wchar_t array can be initialized by a wide
4965 string-literal (optionally enclosed in braces). */
4966 if (TREE_CODE (type) == ARRAY_TYPE
4967 && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type))))
4969 tree str_init = init;
4971 /* Strip one level of braces if and only if they enclose a single
4972 element (as allowed by [dcl.init.string]). */
4973 if (!first_initializer_p
4974 && TREE_CODE (str_init) == CONSTRUCTOR
4975 && VEC_length (constructor_elt, CONSTRUCTOR_ELTS (str_init)) == 1)
4977 str_init = VEC_index (constructor_elt,
4978 CONSTRUCTOR_ELTS (str_init), 0)->value;
4981 /* If it's a string literal, then it's the initializer for the array
4982 as a whole. Otherwise, continue with normal initialization for
4983 array types (one value per array element). */
4984 if (TREE_CODE (str_init) == STRING_CST)
4991 /* The following cases are about aggregates. If we are not within a full
4992 initializer already, and there is not a CONSTRUCTOR, it means that there
4993 is a missing set of braces (that is, we are processing the case for
4994 which reshape_init exists). */
4995 if (!first_initializer_p)
4997 if (TREE_CODE (init) == CONSTRUCTOR)
4999 if (TREE_TYPE (init) && TYPE_PTRMEMFUNC_P (TREE_TYPE (init)))
5000 /* There is no need to reshape pointer-to-member function
5001 initializers, as they are always constructed correctly
5002 by the front end. */
5004 else if (COMPOUND_LITERAL_P (init))
5005 /* For a nested compound literal, there is no need to reshape since
5006 brace elision is not allowed. Even if we decided to allow it,
5007 we should add a call to reshape_init in finish_compound_literal,
5008 before calling digest_init, so changing this code would still
5009 not be necessary. */
5010 gcc_assert (!BRACE_ENCLOSED_INITIALIZER_P (init));
5014 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init));
5015 return reshape_init (type, init);
5019 warning (OPT_Wmissing_braces, "missing braces around initializer for %qT",
5023 /* Dispatch to specialized routines. */
5024 if (CLASS_TYPE_P (type))
5025 return reshape_init_class (type, d, first_initializer_p);
5026 else if (TREE_CODE (type) == ARRAY_TYPE)
5027 return reshape_init_array (type, d);
5028 else if (TREE_CODE (type) == VECTOR_TYPE)
5029 return reshape_init_vector (type, d);
5034 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
5035 brace-enclosed aggregate initializer.
5037 INIT is the CONSTRUCTOR containing the list of initializers describing
5038 a brace-enclosed initializer for an entity of the indicated aggregate TYPE.
5039 It may not presently match the shape of the TYPE; for example:
5041 struct S { int a; int b; };
5042 struct S a[] = { 1, 2, 3, 4 };
5044 Here INIT will hold a VEC of four elements, rather than a
5045 VEC of two elements, each itself a VEC of two elements. This
5046 routine transforms INIT from the former form into the latter. The
5047 revised CONSTRUCTOR node is returned. */
5050 reshape_init (tree type, tree init)
5052 VEC(constructor_elt, gc) *v;
5056 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init));
5058 v = CONSTRUCTOR_ELTS (init);
5060 /* An empty constructor does not need reshaping, and it is always a valid
5062 if (VEC_empty (constructor_elt, v))
5065 /* Recurse on this CONSTRUCTOR. */
5066 d.cur = VEC_index (constructor_elt, v, 0);
5067 d.end = d.cur + VEC_length (constructor_elt, v);
5069 new_init = reshape_init_r (type, &d, true);
5070 if (new_init == error_mark_node)
5071 return error_mark_node;
5073 /* Make sure all the element of the constructor were used. Otherwise,
5074 issue an error about exceeding initializers. */
5076 error ("too many initializers for %qT", type);
5081 /* Verify array initializer. Returns true if errors have been reported. */
5084 check_array_initializer (tree decl, tree type, tree init)
5086 tree element_type = TREE_TYPE (type);
5088 /* The array type itself need not be complete, because the
5089 initializer may tell us how many elements are in the array.
5090 But, the elements of the array must be complete. */
5091 if (!COMPLETE_TYPE_P (complete_type (element_type)))
5094 error ("elements of array %q#D have incomplete type", decl);
5096 error ("elements of array %q#T have incomplete type", type);
5099 /* It is not valid to initialize a VLA. */
5101 && ((COMPLETE_TYPE_P (type) && !TREE_CONSTANT (TYPE_SIZE (type)))
5102 || !TREE_CONSTANT (TYPE_SIZE (element_type))))
5105 error ("variable-sized object %qD may not be initialized", decl);
5107 error ("variable-sized compound literal");
5113 /* Subroutine of check_initializer; args are passed down from that function.
5114 Set stmts_are_full_exprs_p to 1 across a call to build_aggr_init. */
5117 build_aggr_init_full_exprs (tree decl, tree init, int flags)
5120 int saved_stmts_are_full_exprs_p = 0;
5121 if (building_stmt_tree ())
5123 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
5124 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
5126 init = build_aggr_init (decl, init, flags, tf_warning_or_error);
5127 if (building_stmt_tree ())
5128 current_stmt_tree ()->stmts_are_full_exprs_p =
5129 saved_stmts_are_full_exprs_p;
5133 /* Verify INIT (the initializer for DECL), and record the
5134 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
5135 grok_reference_init.
5137 If the return value is non-NULL, it is an expression that must be
5138 evaluated dynamically to initialize DECL. */
5141 check_initializer (tree decl, tree init, int flags, tree *cleanup)
5143 tree type = TREE_TYPE (decl);
5144 tree init_code = NULL;
5146 /* Things that are going to be initialized need to have complete
5148 TREE_TYPE (decl) = type = complete_type (TREE_TYPE (decl));
5150 if (type == error_mark_node)
5151 /* We will have already complained. */
5154 if (TREE_CODE (type) == ARRAY_TYPE)
5156 if (check_array_initializer (decl, type, init))
5159 else if (!COMPLETE_TYPE_P (type))
5161 error ("%qD has incomplete type", decl);
5162 TREE_TYPE (decl) = error_mark_node;
5166 /* There is no way to make a variable-sized class type in GNU C++. */
5167 gcc_assert (TREE_CONSTANT (TYPE_SIZE (type)));
5169 if (init && BRACE_ENCLOSED_INITIALIZER_P (init))
5171 int init_len = VEC_length (constructor_elt, CONSTRUCTOR_ELTS (init));
5172 if (SCALAR_TYPE_P (type))
5176 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS);
5177 init = build_zero_init (type, NULL_TREE, false);
5179 else if (init_len != 1)
5181 error ("scalar object %qD requires one element in initializer",
5183 TREE_TYPE (decl) = error_mark_node;
5189 if (TREE_CODE (decl) == CONST_DECL)
5191 gcc_assert (TREE_CODE (type) != REFERENCE_TYPE);
5193 DECL_INITIAL (decl) = init;
5195 gcc_assert (init != NULL_TREE);
5198 else if (!DECL_EXTERNAL (decl) && TREE_CODE (type) == REFERENCE_TYPE)
5199 init = grok_reference_init (decl, type, init, cleanup);
5202 /* Do not reshape constructors of vectors (they don't need to be
5204 if (BRACE_ENCLOSED_INITIALIZER_P (init))
5206 if (is_std_init_list (type))
5207 return build_init_list_var_init (decl, type, init, cleanup);
5208 else if (TYPE_NON_AGGREGATE_CLASS (type))
5210 /* Don't reshape if the class has constructors. */
5211 if (cxx_dialect == cxx98)
5212 error ("in C++98 %qD must be initialized by constructor, "
5215 init = build_tree_list (NULL_TREE, init);
5217 else if (TREE_CODE (type) == VECTOR_TYPE && TYPE_VECTOR_OPAQUE (type))
5219 error ("opaque vector types cannot be initialized");
5220 init = error_mark_node;
5223 init = reshape_init (type, init);
5226 /* If DECL has an array type without a specific bound, deduce the
5227 array size from the initializer. */
5228 maybe_deduce_size_from_array_init (decl, init);
5229 type = TREE_TYPE (decl);
5230 if (type == error_mark_node)
5233 if (TYPE_NEEDS_CONSTRUCTING (type)
5234 || (CLASS_TYPE_P (type)
5235 && !BRACE_ENCLOSED_INITIALIZER_P (init)))
5236 return build_aggr_init_full_exprs (decl, init, flags);
5237 else if (TREE_CODE (init) != TREE_VEC)
5239 init_code = store_init_value (decl, init, flags);
5240 if (pedantic && TREE_CODE (type) == ARRAY_TYPE
5241 && DECL_INITIAL (decl)
5242 && TREE_CODE (DECL_INITIAL (decl)) == STRING_CST
5243 && PAREN_STRING_LITERAL_P (DECL_INITIAL (decl)))
5244 warning (0, "array %qD initialized by parenthesized string literal %qE",
5245 decl, DECL_INITIAL (decl));
5249 else if (DECL_EXTERNAL (decl))
5251 else if (TYPE_P (type) && TYPE_NEEDS_CONSTRUCTING (type))
5252 return build_aggr_init_full_exprs (decl, init, flags);
5253 else if (MAYBE_CLASS_TYPE_P (type))
5255 tree core_type = strip_array_types (type);
5257 if (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type))
5258 error ("structure %qD with uninitialized const members", decl);
5259 if (CLASSTYPE_REF_FIELDS_NEED_INIT (core_type))
5260 error ("structure %qD with uninitialized reference members", decl);
5262 check_for_uninitialized_const_var (decl);
5265 check_for_uninitialized_const_var (decl);
5267 if (init && init != error_mark_node)
5268 init_code = build2 (INIT_EXPR, type, decl, init);
5273 /* If DECL is not a local variable, give it RTL. */
5276 make_rtl_for_nonlocal_decl (tree decl, tree init, const char* asmspec)
5278 int toplev = toplevel_bindings_p ();
5280 const char *filename;
5282 /* Set the DECL_ASSEMBLER_NAME for the object. */
5285 /* The `register' keyword, when used together with an
5286 asm-specification, indicates that the variable should be
5287 placed in a particular register. */
5288 if (TREE_CODE (decl) == VAR_DECL && DECL_REGISTER (decl))
5290 set_user_assembler_name (decl, asmspec);
5291 DECL_HARD_REGISTER (decl) = 1;
5295 if (TREE_CODE (decl) == FUNCTION_DECL
5296 && DECL_BUILT_IN_CLASS (decl) == BUILT_IN_NORMAL)
5297 set_builtin_user_assembler_name (decl, asmspec);
5298 set_user_assembler_name (decl, asmspec);
5302 /* Handle non-variables up front. */
5303 if (TREE_CODE (decl) != VAR_DECL)
5305 rest_of_decl_compilation (decl, toplev, at_eof);
5309 /* If we see a class member here, it should be a static data
5311 if (DECL_LANG_SPECIFIC (decl) && DECL_IN_AGGR_P (decl))
5313 gcc_assert (TREE_STATIC (decl));
5314 /* An in-class declaration of a static data member should be
5315 external; it is only a declaration, and not a definition. */
5316 if (init == NULL_TREE)
5317 gcc_assert (DECL_EXTERNAL (decl) || !TREE_PUBLIC (decl));
5320 /* We don't create any RTL for local variables. */
5321 if (DECL_FUNCTION_SCOPE_P (decl) && !TREE_STATIC (decl))
5324 /* We defer emission of local statics until the corresponding
5325 DECL_EXPR is expanded. */
5326 defer_p = DECL_FUNCTION_SCOPE_P (decl) || DECL_VIRTUAL_P (decl);
5328 /* We try to defer namespace-scope static constants so that they are
5329 not emitted into the object file unnecessarily. */
5330 filename = input_filename;
5331 if (!DECL_VIRTUAL_P (decl)
5332 && TREE_READONLY (decl)
5333 && DECL_INITIAL (decl) != NULL_TREE
5334 && DECL_INITIAL (decl) != error_mark_node
5336 && ! EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl))
5338 && !TREE_PUBLIC (decl))
5340 /* Fool with the linkage of static consts according to #pragma
5342 struct c_fileinfo *finfo = get_fileinfo (filename);
5343 if (!finfo->interface_unknown && !TREE_PUBLIC (decl))
5345 TREE_PUBLIC (decl) = 1;
5346 DECL_EXTERNAL (decl) = finfo->interface_only;
5351 /* Likewise for template instantiations. */
5352 else if (DECL_LANG_SPECIFIC (decl)
5353 && DECL_IMPLICIT_INSTANTIATION (decl))
5356 /* If we're not deferring, go ahead and assemble the variable. */
5358 rest_of_decl_compilation (decl, toplev, at_eof);
5361 /* walk_tree helper for wrap_temporary_cleanups, below. */
5364 wrap_cleanups_r (tree *stmt_p, int *walk_subtrees, void *data)
5366 if (TYPE_P (*stmt_p))
5372 if (TREE_CODE (*stmt_p) == TARGET_EXPR)
5374 tree guard = (tree)data;
5375 tree tcleanup = TARGET_EXPR_CLEANUP (*stmt_p);
5377 tcleanup = build2 (TRY_CATCH_EXPR, void_type_node, tcleanup, guard);
5378 /* Tell honor_protect_cleanup_actions to handle this as a separate
5380 TRY_CATCH_IS_CLEANUP (tcleanup) = 1;
5382 TARGET_EXPR_CLEANUP (*stmt_p) = tcleanup;
5388 /* We're initializing a local variable which has a cleanup GUARD. If there
5389 are any temporaries used in the initializer INIT of this variable, we
5390 need to wrap their cleanups with TRY_CATCH_EXPR (, GUARD) so that the
5391 variable will be cleaned up properly if one of them throws.
5393 Unfortunately, there's no way to express this properly in terms of
5394 nesting, as the regions for the temporaries overlap the region for the
5395 variable itself; if there are two temporaries, the variable needs to be
5396 the first thing destroyed if either of them throws. However, we only
5397 want to run the variable's cleanup if it actually got constructed. So
5398 we need to guard the temporary cleanups with the variable's cleanup if
5399 they are run on the normal path, but not if they are run on the
5400 exceptional path. We implement this by telling
5401 honor_protect_cleanup_actions to strip the variable cleanup from the
5402 exceptional path. */
5405 wrap_temporary_cleanups (tree init, tree guard)
5407 cp_walk_tree_without_duplicates (&init, wrap_cleanups_r, (void *)guard);
5410 /* Generate code to initialize DECL (a local variable). */
5413 initialize_local_var (tree decl, tree init)
5415 tree type = TREE_TYPE (decl);
5419 gcc_assert (TREE_CODE (decl) == VAR_DECL
5420 || TREE_CODE (decl) == RESULT_DECL);
5421 gcc_assert (!TREE_STATIC (decl));
5423 if (DECL_SIZE (decl) == NULL_TREE)
5425 /* If we used it already as memory, it must stay in memory. */
5426 DECL_INITIAL (decl) = NULL_TREE;
5427 TREE_ADDRESSABLE (decl) = TREE_USED (decl);
5431 if (type == error_mark_node)
5434 /* Compute and store the initial value. */
5435 already_used = TREE_USED (decl) || TREE_USED (type);
5437 /* Generate a cleanup, if necessary. */
5438 cleanup = cxx_maybe_build_cleanup (decl);
5440 /* Perform the initialization. */
5443 int saved_stmts_are_full_exprs_p;
5445 /* If we're only initializing a single object, guard the destructors
5446 of any temporaries used in its initializer with its destructor.
5447 This isn't right for arrays because each element initialization is
5448 a full-expression. */
5449 if (cleanup && TREE_CODE (type) != ARRAY_TYPE)
5450 wrap_temporary_cleanups (init, cleanup);
5452 gcc_assert (building_stmt_tree ());
5453 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
5454 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
5455 finish_expr_stmt (init);
5456 current_stmt_tree ()->stmts_are_full_exprs_p =
5457 saved_stmts_are_full_exprs_p;
5460 /* Set this to 0 so we can tell whether an aggregate which was
5461 initialized was ever used. Don't do this if it has a
5462 destructor, so we don't complain about the 'resource
5463 allocation is initialization' idiom. Now set
5464 attribute((unused)) on types so decls of that type will be
5465 marked used. (see TREE_USED, above.) */
5466 if (TYPE_NEEDS_CONSTRUCTING (type)
5468 && TYPE_HAS_TRIVIAL_DESTRUCTOR (type)
5469 && DECL_NAME (decl))
5470 TREE_USED (decl) = 0;
5471 else if (already_used)
5472 TREE_USED (decl) = 1;
5475 finish_decl_cleanup (decl, cleanup);
5478 /* DECL is a VAR_DECL for a compiler-generated variable with static
5479 storage duration (like a virtual table) whose initializer is a
5480 compile-time constant. INIT must be either a TREE_LIST of values,
5481 or a CONSTRUCTOR. Initialize the variable and provide it to the
5485 initialize_artificial_var (tree decl, tree init)
5487 gcc_assert (DECL_ARTIFICIAL (decl));
5488 if (TREE_CODE (init) == TREE_LIST)
5489 init = build_constructor_from_list (TREE_TYPE (decl), init);
5490 gcc_assert (TREE_CODE (init) == CONSTRUCTOR);
5491 DECL_INITIAL (decl) = init;
5492 DECL_INITIALIZED_P (decl) = 1;
5493 determine_visibility (decl);
5494 layout_var_decl (decl);
5495 maybe_commonize_var (decl);
5496 make_rtl_for_nonlocal_decl (decl, init, /*asmspec=*/NULL);
5499 /* INIT is the initializer for a variable, as represented by the
5500 parser. Returns true iff INIT is value-dependent. */
5503 value_dependent_init_p (tree init)
5505 if (TREE_CODE (init) == TREE_LIST)
5506 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
5507 return any_value_dependent_elements_p (init);
5508 else if (TREE_CODE (init) == CONSTRUCTOR)
5509 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
5511 VEC(constructor_elt, gc) *elts;
5515 elts = CONSTRUCTOR_ELTS (init);
5516 nelts = VEC_length (constructor_elt, elts);
5517 for (i = 0; i < nelts; ++i)
5518 if (value_dependent_init_p (VEC_index (constructor_elt,
5523 /* It must be a simple expression, e.g., int i = 3; */
5524 return value_dependent_expression_p (init);
5529 /* Finish processing of a declaration;
5530 install its line number and initial value.
5531 If the length of an array type is not known before,
5532 it must be determined now, from the initial value, or it is an error.
5534 INIT is the initializer (if any) for DECL. If INIT_CONST_EXPR_P is
5535 true, then INIT is an integral constant expression.
5537 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
5538 if the (init) syntax was used. */
5541 cp_finish_decl (tree decl, tree init, bool init_const_expr_p,
5542 tree asmspec_tree, int flags)
5546 const char *asmspec = NULL;
5547 int was_readonly = 0;
5548 bool var_definition_p = false;
5549 int saved_processing_template_decl;
5552 if (decl == error_mark_node)
5557 error ("assignment (not initialization) in declaration");
5561 gcc_assert (TREE_CODE (decl) != RESULT_DECL);
5562 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
5563 gcc_assert (TREE_CODE (decl) != PARM_DECL);
5565 type = TREE_TYPE (decl);
5566 if (type == error_mark_node)
5569 /* Assume no cleanup is required. */
5570 cleanup = NULL_TREE;
5571 saved_processing_template_decl = processing_template_decl;
5573 /* If a name was specified, get the string. */
5574 if (global_scope_p (current_binding_level))
5575 asmspec_tree = maybe_apply_renaming_pragma (decl, asmspec_tree);
5576 if (asmspec_tree && asmspec_tree != error_mark_node)
5577 asmspec = TREE_STRING_POINTER (asmspec_tree);
5579 if (current_class_type
5580 && CP_DECL_CONTEXT (decl) == current_class_type
5581 && TYPE_BEING_DEFINED (current_class_type)
5582 && (DECL_INITIAL (decl) || init))
5583 DECL_INITIALIZED_IN_CLASS_P (decl) = 1;
5585 auto_node = type_uses_auto (type);
5588 if (init == NULL_TREE)
5590 error ("declaration of %q#D has no initializer", decl);
5591 TREE_TYPE (decl) = error_mark_node;
5594 if (TREE_CODE (init) == TREE_LIST)
5595 init = build_x_compound_expr_from_list (init, "initializer");
5596 if (describable_type (init))
5598 type = TREE_TYPE (decl) = do_auto_deduction (type, init, auto_node);
5599 if (type == error_mark_node)
5604 if (init && TREE_CODE (decl) == FUNCTION_DECL)
5607 if (init == ridpointers[(int)RID_DELETE])
5609 /* FIXME check this is 1st decl. */
5610 DECL_DELETED_FN (decl) = 1;
5611 DECL_DECLARED_INLINE_P (decl) = 1;
5612 DECL_INITIAL (decl) = error_mark_node;
5613 FOR_EACH_CLONE (clone, decl)
5615 DECL_DELETED_FN (clone) = 1;
5616 DECL_DECLARED_INLINE_P (clone) = 1;
5617 DECL_INITIAL (clone) = error_mark_node;
5621 else if (init == ridpointers[(int)RID_DEFAULT])
5623 if (defaultable_fn_check (decl))
5624 DECL_DEFAULTED_FN (decl) = 1;
5626 DECL_INITIAL (decl) = NULL_TREE;
5630 if (processing_template_decl)
5632 bool type_dependent_p;
5634 /* Add this declaration to the statement-tree. */
5635 if (at_function_scope_p ())
5636 add_decl_expr (decl);
5638 type_dependent_p = dependent_type_p (type);
5640 if (check_for_bare_parameter_packs (init))
5643 DECL_INITIAL (decl) = NULL_TREE;
5646 if (init && init_const_expr_p && TREE_CODE (decl) == VAR_DECL)
5648 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl) = 1;
5649 if (DECL_INTEGRAL_CONSTANT_VAR_P (decl))
5650 TREE_CONSTANT (decl) = 1;
5653 /* Generally, initializers in templates are expanded when the
5654 template is instantiated. But, if DECL is an integral
5655 constant static data member, then it can be used in future
5656 integral constant expressions, and its value must be
5659 && DECL_CLASS_SCOPE_P (decl)
5660 && DECL_INTEGRAL_CONSTANT_VAR_P (decl)
5661 && !type_dependent_p
5662 && !value_dependent_init_p (init)))
5665 DECL_INITIAL (decl) = init;
5666 if (TREE_CODE (decl) == VAR_DECL
5667 && !DECL_PRETTY_FUNCTION_P (decl)
5668 && !type_dependent_p)
5669 maybe_deduce_size_from_array_init (decl, init);
5673 if (TREE_CODE (init) == TREE_LIST)
5675 /* If the parenthesized-initializer form was used (e.g.,
5676 "int A<N>::i(X)"), then INIT will be a TREE_LIST of initializer
5677 arguments. (There is generally only one.) We convert them
5680 for (; list; list = TREE_CHAIN (list))
5682 tree elt = TREE_VALUE (list);
5683 TREE_VALUE (list) = fold_non_dependent_expr (elt);
5687 init = fold_non_dependent_expr (init);
5688 processing_template_decl = 0;
5691 /* Take care of TYPE_DECLs up front. */
5692 if (TREE_CODE (decl) == TYPE_DECL)
5694 if (type != error_mark_node
5695 && MAYBE_CLASS_TYPE_P (type) && DECL_NAME (decl))
5697 if (TREE_TYPE (DECL_NAME (decl)) && TREE_TYPE (decl) != type)
5698 warning (0, "shadowing previous type declaration of %q#D", decl);
5699 set_identifier_type_value (DECL_NAME (decl), decl);
5702 /* If we have installed this as the canonical typedef for this
5703 type, and that type has not been defined yet, delay emitting
5704 the debug information for it, as we will emit it later. */
5705 if (TYPE_MAIN_DECL (TREE_TYPE (decl)) == decl
5706 && !COMPLETE_TYPE_P (TREE_TYPE (decl)))
5707 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
5709 rest_of_decl_compilation (decl, DECL_CONTEXT (decl) == NULL_TREE,
5714 /* A reference will be modified here, as it is initialized. */
5715 if (! DECL_EXTERNAL (decl)
5716 && TREE_READONLY (decl)
5717 && TREE_CODE (type) == REFERENCE_TYPE)
5720 TREE_READONLY (decl) = 0;
5723 if (TREE_CODE (decl) == VAR_DECL)
5725 /* Only variables with trivial initialization and destruction can
5726 have thread-local storage. */
5727 if (DECL_THREAD_LOCAL_P (decl)
5728 && (type_has_nontrivial_default_init (TREE_TYPE (decl))
5729 || TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl))))
5730 error ("%qD cannot be thread-local because it has non-trivial "
5731 "type %qT", decl, TREE_TYPE (decl));
5732 /* If this is a local variable that will need a mangled name,
5733 register it now. We must do this before processing the
5734 initializer for the variable, since the initialization might
5735 require a guard variable, and since the mangled name of the
5736 guard variable will depend on the mangled name of this
5738 if (DECL_FUNCTION_SCOPE_P (decl)
5739 && TREE_STATIC (decl)
5740 && !DECL_ARTIFICIAL (decl))
5741 push_local_name (decl);
5742 /* Convert the initializer to the type of DECL, if we have not
5743 already initialized DECL. */
5744 if (!DECL_INITIALIZED_P (decl)
5745 /* If !DECL_EXTERNAL then DECL is being defined. In the
5746 case of a static data member initialized inside the
5747 class-specifier, there can be an initializer even if DECL
5748 is *not* defined. */
5749 && (!DECL_EXTERNAL (decl) || init))
5751 if (TYPE_FOR_JAVA (type) && MAYBE_CLASS_TYPE_P (type))
5754 = IDENTIFIER_GLOBAL_VALUE (get_identifier ("jclass"));
5755 /* Allow libjava/prims.cc define primitive classes. */
5756 if (init != NULL_TREE
5757 || jclass == NULL_TREE
5758 || TREE_CODE (jclass) != TYPE_DECL
5759 || !POINTER_TYPE_P (TREE_TYPE (jclass))
5760 || !same_type_ignoring_top_level_qualifiers_p
5761 (type, TREE_TYPE (TREE_TYPE (jclass))))
5762 error ("Java object %qD not allocated with %<new%>", decl);
5767 DECL_NONTRIVIALLY_INITIALIZED_P (decl) = 1;
5768 if (init_const_expr_p)
5770 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl) = 1;
5771 if (DECL_INTEGRAL_CONSTANT_VAR_P (decl))
5772 TREE_CONSTANT (decl) = 1;
5775 init = check_initializer (decl, init, flags, &cleanup);
5776 /* Thread-local storage cannot be dynamically initialized. */
5777 if (DECL_THREAD_LOCAL_P (decl) && init)
5779 error ("%qD is thread-local and so cannot be dynamically "
5780 "initialized", decl);
5784 /* Check that the initializer for a static data member was a
5785 constant. Although we check in the parser that the
5786 initializer is an integral constant expression, we do not
5787 simplify division-by-zero at the point at which it
5788 occurs. Therefore, in:
5790 struct S { static const int i = 7 / 0; };
5792 we issue an error at this point. It would
5793 probably be better to forbid division by zero in
5794 integral constant expressions. */
5795 if (DECL_EXTERNAL (decl) && init)
5797 error ("%qD cannot be initialized by a non-constant expression"
5798 " when being declared", decl);
5799 DECL_INITIALIZED_IN_CLASS_P (decl) = 0;
5807 The memory occupied by any object of static storage
5808 duration is zero-initialized at program startup before
5809 any other initialization takes place.
5811 We cannot create an appropriate initializer until after
5812 the type of DECL is finalized. If DECL_INITIAL is set,
5813 then the DECL is statically initialized, and any
5814 necessary zero-initialization has already been performed. */
5815 if (TREE_STATIC (decl) && !DECL_INITIAL (decl))
5816 DECL_INITIAL (decl) = build_zero_init (TREE_TYPE (decl),
5817 /*nelts=*/NULL_TREE,
5818 /*static_storage_p=*/true);
5819 /* Remember that the initialization for this variable has
5821 DECL_INITIALIZED_P (decl) = 1;
5822 /* This declaration is the definition of this variable,
5823 unless we are initializing a static data member within
5824 the class specifier. */
5825 if (!DECL_EXTERNAL (decl))
5826 var_definition_p = true;
5828 /* If the variable has an array type, lay out the type, even if
5829 there is no initializer. It is valid to index through the
5830 array, and we must get TYPE_ALIGN set correctly on the array
5832 else if (TREE_CODE (type) == ARRAY_TYPE)
5835 if (!processing_template_decl
5836 && TREE_STATIC (decl)
5837 && !at_function_scope_p ()
5838 && current_function_decl == NULL)
5839 /* So decl is a global variable or a static member of a
5840 non local class. Record the types it uses
5841 so that we can decide later to emit debug info for them. */
5842 record_types_used_by_current_var_decl (decl);
5844 else if (TREE_CODE (decl) == FIELD_DECL
5845 && TYPE_FOR_JAVA (type) && MAYBE_CLASS_TYPE_P (type))
5846 error ("non-static data member %qD has Java class type", decl);
5848 /* Add this declaration to the statement-tree. This needs to happen
5849 after the call to check_initializer so that the DECL_EXPR for a
5850 reference temp is added before the DECL_EXPR for the reference itself. */
5851 if (at_function_scope_p ())
5852 add_decl_expr (decl);
5854 /* Let the middle end know about variables and functions -- but not
5855 static data members in uninstantiated class templates. */
5856 if (!saved_processing_template_decl
5857 && (TREE_CODE (decl) == VAR_DECL
5858 || TREE_CODE (decl) == FUNCTION_DECL))
5860 if (TREE_CODE (decl) == VAR_DECL)
5862 layout_var_decl (decl);
5863 maybe_commonize_var (decl);
5866 /* This needs to happen after the linkage is set. */
5867 determine_visibility (decl);
5869 if (var_definition_p && TREE_STATIC (decl))
5871 /* If a TREE_READONLY variable needs initialization
5872 at runtime, it is no longer readonly and we need to
5873 avoid MEM_READONLY_P being set on RTL created for it. */
5876 if (TREE_READONLY (decl))
5877 TREE_READONLY (decl) = 0;
5880 else if (was_readonly)
5881 TREE_READONLY (decl) = 1;
5884 make_rtl_for_nonlocal_decl (decl, init, asmspec);
5886 /* Check for abstractness of the type. Notice that there is no
5887 need to strip array types here since the check for those types
5888 is already done within create_array_type_for_decl. */
5889 if (TREE_CODE (type) == FUNCTION_TYPE
5890 || TREE_CODE (type) == METHOD_TYPE)
5891 abstract_virtuals_error (decl, TREE_TYPE (type));
5893 abstract_virtuals_error (decl, type);
5895 if (TREE_TYPE (decl) == error_mark_node)
5896 /* No initialization required. */
5898 else if (TREE_CODE (decl) == FUNCTION_DECL)
5902 if (init == ridpointers[(int)RID_DEFAULT])
5904 /* An out-of-class default definition is defined at
5905 the point where it is explicitly defaulted. */
5906 if (DECL_INITIAL (decl) == error_mark_node)
5907 synthesize_method (decl);
5910 error ("function %q#D is initialized like a variable", decl);
5912 /* else no initialization required. */
5914 else if (DECL_EXTERNAL (decl)
5915 && ! (DECL_LANG_SPECIFIC (decl)
5916 && DECL_NOT_REALLY_EXTERN (decl)))
5919 DECL_INITIAL (decl) = init;
5921 /* A variable definition. */
5922 else if (DECL_FUNCTION_SCOPE_P (decl) && !TREE_STATIC (decl))
5923 /* Initialize the local variable. */
5924 initialize_local_var (decl, init);
5926 /* If a variable is defined, and then a subsequent
5927 definition with external linkage is encountered, we will
5928 get here twice for the same variable. We want to avoid
5929 calling expand_static_init more than once. For variables
5930 that are not static data members, we can call
5931 expand_static_init only when we actually process the
5932 initializer. It is not legal to redeclare a static data
5933 member, so this issue does not arise in that case. */
5934 else if (var_definition_p && TREE_STATIC (decl))
5935 expand_static_init (decl, init);
5938 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
5939 reference, insert it in the statement-tree now. */
5941 push_cleanup (decl, cleanup, false);
5944 processing_template_decl = saved_processing_template_decl;
5947 TREE_READONLY (decl) = 1;
5949 /* If this was marked 'used', be sure it will be output. */
5950 if (lookup_attribute ("used", DECL_ATTRIBUTES (decl)))
5951 mark_decl_referenced (decl);
5954 /* Returns a declaration for a VAR_DECL as if:
5956 extern "C" TYPE NAME;
5958 had been seen. Used to create compiler-generated global
5962 declare_global_var (tree name, tree type)
5966 push_to_top_level ();
5967 decl = build_decl (input_location, VAR_DECL, name, type);
5968 TREE_PUBLIC (decl) = 1;
5969 DECL_EXTERNAL (decl) = 1;
5970 DECL_ARTIFICIAL (decl) = 1;
5971 /* If the user has explicitly declared this variable (perhaps
5972 because the code we are compiling is part of a low-level runtime
5973 library), then it is possible that our declaration will be merged
5974 with theirs by pushdecl. */
5975 decl = pushdecl (decl);
5976 cp_finish_decl (decl, NULL_TREE, false, NULL_TREE, 0);
5977 pop_from_top_level ();
5982 /* Returns the type for the argument to "__cxa_atexit" (or "atexit",
5983 if "__cxa_atexit" is not being used) corresponding to the function
5984 to be called when the program exits. */
5987 get_atexit_fn_ptr_type (void)
5992 if (!atexit_fn_ptr_type_node)
5994 if (flag_use_cxa_atexit
5995 && !targetm.cxx.use_atexit_for_cxa_atexit ())
5996 /* The parameter to "__cxa_atexit" is "void (*)(void *)". */
5997 arg_types = tree_cons (NULL_TREE, ptr_type_node, void_list_node);
5999 /* The parameter to "atexit" is "void (*)(void)". */
6000 arg_types = void_list_node;
6002 fn_type = build_function_type (void_type_node, arg_types);
6003 atexit_fn_ptr_type_node = build_pointer_type (fn_type);
6006 return atexit_fn_ptr_type_node;
6009 /* Returns a pointer to the `atexit' function. Note that if
6010 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
6011 `__cxa_atexit' function specified in the IA64 C++ ABI. */
6014 get_atexit_node (void)
6021 bool use_aeabi_atexit;
6026 if (flag_use_cxa_atexit && !targetm.cxx.use_atexit_for_cxa_atexit ())
6028 /* The declaration for `__cxa_atexit' is:
6030 int __cxa_atexit (void (*)(void *), void *, void *)
6032 We build up the argument types and then then function type
6035 use_aeabi_atexit = targetm.cxx.use_aeabi_atexit ();
6036 /* First, build the pointer-to-function type for the first
6038 fn_ptr_type = get_atexit_fn_ptr_type ();
6039 /* Then, build the rest of the argument types. */
6040 arg_types = tree_cons (NULL_TREE, ptr_type_node, void_list_node);
6041 if (use_aeabi_atexit)
6043 arg_types = tree_cons (NULL_TREE, fn_ptr_type, arg_types);
6044 arg_types = tree_cons (NULL_TREE, ptr_type_node, arg_types);
6048 arg_types = tree_cons (NULL_TREE, ptr_type_node, arg_types);
6049 arg_types = tree_cons (NULL_TREE, fn_ptr_type, arg_types);
6051 /* And the final __cxa_atexit type. */
6052 fn_type = build_function_type (integer_type_node, arg_types);
6053 fn_ptr_type = build_pointer_type (fn_type);
6054 if (use_aeabi_atexit)
6055 name = "__aeabi_atexit";
6057 name = "__cxa_atexit";
6061 /* The declaration for `atexit' is:
6063 int atexit (void (*)());
6065 We build up the argument types and then then function type
6067 fn_ptr_type = get_atexit_fn_ptr_type ();
6068 arg_types = tree_cons (NULL_TREE, fn_ptr_type, void_list_node);
6069 /* Build the final atexit type. */
6070 fn_type = build_function_type (integer_type_node, arg_types);
6074 /* Now, build the function declaration. */
6075 push_lang_context (lang_name_c);
6076 atexit_fndecl = build_library_fn_ptr (name, fn_type);
6077 mark_used (atexit_fndecl);
6078 pop_lang_context ();
6079 atexit_node = decay_conversion (atexit_fndecl);
6084 /* Returns the __dso_handle VAR_DECL. */
6087 get_dso_handle_node (void)
6089 if (dso_handle_node)
6090 return dso_handle_node;
6092 /* Declare the variable. */
6093 dso_handle_node = declare_global_var (get_identifier ("__dso_handle"),
6096 return dso_handle_node;
6099 /* Begin a new function with internal linkage whose job will be simply
6100 to destroy some particular variable. */
6102 static GTY(()) int start_cleanup_cnt;
6105 start_cleanup_fn (void)
6110 bool use_cxa_atexit = flag_use_cxa_atexit
6111 && !targetm.cxx.use_atexit_for_cxa_atexit ();
6113 push_to_top_level ();
6115 /* No need to mangle this. */
6116 push_lang_context (lang_name_c);
6118 /* Build the name of the function. */
6119 sprintf (name, "__tcf_%d", start_cleanup_cnt++);
6120 /* Build the function declaration. */
6121 fntype = TREE_TYPE (get_atexit_fn_ptr_type ());
6122 fndecl = build_lang_decl (FUNCTION_DECL, get_identifier (name), fntype);
6123 /* It's a function with internal linkage, generated by the
6125 TREE_PUBLIC (fndecl) = 0;
6126 DECL_ARTIFICIAL (fndecl) = 1;
6127 /* Make the function `inline' so that it is only emitted if it is
6128 actually needed. It is unlikely that it will be inlined, since
6129 it is only called via a function pointer, but we avoid unnecessary
6130 emissions this way. */
6131 DECL_DECLARED_INLINE_P (fndecl) = 1;
6132 DECL_INTERFACE_KNOWN (fndecl) = 1;
6133 /* Build the parameter. */
6138 parmdecl = cp_build_parm_decl (NULL_TREE, ptr_type_node);
6139 DECL_CONTEXT (parmdecl) = fndecl;
6140 TREE_USED (parmdecl) = 1;
6141 DECL_ARGUMENTS (fndecl) = parmdecl;
6145 start_preparsed_function (fndecl, NULL_TREE, SF_PRE_PARSED);
6147 pop_lang_context ();
6149 return current_function_decl;
6152 /* Finish the cleanup function begun by start_cleanup_fn. */
6155 end_cleanup_fn (void)
6157 expand_or_defer_fn (finish_function (0));
6159 pop_from_top_level ();
6162 /* Generate code to handle the destruction of DECL, an object with
6163 static storage duration. */
6166 register_dtor_fn (tree decl)
6175 type = TREE_TYPE (decl);
6176 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (type))
6177 return void_zero_node;
6179 /* If we're using "__cxa_atexit" (or "__aeabi_atexit"), and DECL is
6180 a class object, we can just pass the destructor to
6181 "__cxa_atexit"; we don't have to build a temporary function to do
6183 use_dtor = (flag_use_cxa_atexit
6184 && !targetm.cxx.use_atexit_for_cxa_atexit ()
6185 && CLASS_TYPE_P (type));
6190 /* Find the destructor. */
6191 idx = lookup_fnfields_1 (type, complete_dtor_identifier);
6192 gcc_assert (idx >= 0);
6193 cleanup = VEC_index (tree, CLASSTYPE_METHOD_VEC (type), idx);
6194 /* Make sure it is accessible. */
6195 perform_or_defer_access_check (TYPE_BINFO (type), cleanup, cleanup);
6199 /* Call build_cleanup before we enter the anonymous function so
6200 that any access checks will be done relative to the current
6201 scope, rather than the scope of the anonymous function. */
6202 build_cleanup (decl);
6204 /* Now start the function. */
6205 cleanup = start_cleanup_fn ();
6207 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
6208 to the original function, rather than the anonymous one. That
6209 will make the back end think that nested functions are in use,
6210 which causes confusion. */
6211 push_deferring_access_checks (dk_no_check);
6212 fcall = build_cleanup (decl);
6213 pop_deferring_access_checks ();
6215 /* Create the body of the anonymous function. */
6216 compound_stmt = begin_compound_stmt (BCS_FN_BODY);
6217 finish_expr_stmt (fcall);
6218 finish_compound_stmt (compound_stmt);
6222 /* Call atexit with the cleanup function. */
6223 mark_used (cleanup);
6224 cleanup = build_address (cleanup);
6225 if (flag_use_cxa_atexit && !targetm.cxx.use_atexit_for_cxa_atexit ())
6231 /* We must convert CLEANUP to the type that "__cxa_atexit"
6233 cleanup = build_nop (get_atexit_fn_ptr_type (), cleanup);
6234 /* "__cxa_atexit" will pass the address of DECL to the
6235 cleanup function. */
6237 addr = build_address (decl);
6238 /* The declared type of the parameter to "__cxa_atexit" is
6239 "void *". For plain "T*", we could just let the
6240 machinery in cp_build_function_call convert it -- but if the
6241 type is "cv-qualified T *", then we need to convert it
6242 before passing it in, to avoid spurious errors. */
6243 addr = build_nop (ptr_type_node, addr);
6246 /* Since the cleanup functions we build ignore the address
6247 they're given, there's no reason to pass the actual address
6248 in, and, in general, it's cheaper to pass NULL than any
6250 addr = null_pointer_node;
6251 args = tree_cons (NULL_TREE,
6252 cp_build_unary_op (ADDR_EXPR, get_dso_handle_node (), 0,
6253 tf_warning_or_error),
6255 if (targetm.cxx.use_aeabi_atexit ())
6257 args = tree_cons (NULL_TREE, cleanup, args);
6258 args = tree_cons (NULL_TREE, addr, args);
6262 args = tree_cons (NULL_TREE, addr, args);
6263 args = tree_cons (NULL_TREE, cleanup, args);
6267 args = tree_cons (NULL_TREE, cleanup, NULL_TREE);
6268 return cp_build_function_call (get_atexit_node (), args,
6269 tf_warning_or_error);
6272 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
6273 is its initializer. Generate code to handle the construction
6274 and destruction of DECL. */
6277 expand_static_init (tree decl, tree init)
6279 gcc_assert (TREE_CODE (decl) == VAR_DECL);
6280 gcc_assert (TREE_STATIC (decl));
6282 /* Some variables require no initialization. */
6284 && !TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl))
6285 && TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
6288 if (DECL_FUNCTION_SCOPE_P (decl))
6290 /* Emit code to perform this initialization but once. */
6291 tree if_stmt = NULL_TREE, inner_if_stmt = NULL_TREE;
6292 tree then_clause = NULL_TREE, inner_then_clause = NULL_TREE;
6293 tree guard, guard_addr;
6294 tree acquire_fn, release_fn, abort_fn;
6297 /* Emit code to perform this initialization but once. This code
6300 static <type> guard;
6301 if (!guard.first_byte) {
6302 if (__cxa_guard_acquire (&guard)) {
6305 // Do initialization.
6306 flag = true; __cxa_guard_release (&guard);
6307 // Register variable for destruction at end of program.
6309 if (!flag) __cxa_guard_abort (&guard);
6313 Note that the `flag' variable is only set to 1 *after* the
6314 initialization is complete. This ensures that an exception,
6315 thrown during the construction, will cause the variable to
6316 reinitialized when we pass through this code again, as per:
6320 If the initialization exits by throwing an exception, the
6321 initialization is not complete, so it will be tried again
6322 the next time control enters the declaration.
6324 This process should be thread-safe, too; multiple threads
6325 should not be able to initialize the variable more than
6328 /* Create the guard variable. */
6329 guard = get_guard (decl);
6331 /* This optimization isn't safe on targets with relaxed memory
6332 consistency. On such targets we force synchronization in
6333 __cxa_guard_acquire. */
6334 if (!targetm.relaxed_ordering || !flag_threadsafe_statics)
6336 /* Begin the conditional initialization. */
6337 if_stmt = begin_if_stmt ();
6338 finish_if_stmt_cond (get_guard_cond (guard), if_stmt);
6339 then_clause = begin_compound_stmt (BCS_NO_SCOPE);
6342 if (flag_threadsafe_statics)
6344 guard_addr = build_address (guard);
6346 acquire_fn = get_identifier ("__cxa_guard_acquire");
6347 release_fn = get_identifier ("__cxa_guard_release");
6348 abort_fn = get_identifier ("__cxa_guard_abort");
6349 if (!get_global_value_if_present (acquire_fn, &acquire_fn))
6351 tree argtypes = tree_cons (NULL_TREE, TREE_TYPE (guard_addr),
6353 tree vfntype = build_function_type (void_type_node, argtypes);
6354 acquire_fn = push_library_fn
6355 (acquire_fn, build_function_type (integer_type_node, argtypes),
6357 release_fn = push_library_fn (release_fn, vfntype, NULL_TREE);
6358 abort_fn = push_library_fn (abort_fn, vfntype, NULL_TREE);
6362 release_fn = identifier_global_value (release_fn);
6363 abort_fn = identifier_global_value (abort_fn);
6366 inner_if_stmt = begin_if_stmt ();
6367 finish_if_stmt_cond (build_call_n (acquire_fn, 1, guard_addr),
6370 inner_then_clause = begin_compound_stmt (BCS_NO_SCOPE);
6371 begin = get_target_expr (boolean_false_node);
6372 flag = TARGET_EXPR_SLOT (begin);
6374 TARGET_EXPR_CLEANUP (begin)
6375 = build3 (COND_EXPR, void_type_node, flag,
6377 build_call_n (abort_fn, 1, guard_addr));
6378 CLEANUP_EH_ONLY (begin) = 1;
6380 /* Do the initialization itself. */
6381 init = add_stmt_to_compound (begin, init);
6382 init = add_stmt_to_compound
6383 (init, build2 (MODIFY_EXPR, void_type_node, flag, boolean_true_node));
6384 init = add_stmt_to_compound
6385 (init, build_call_n (release_fn, 1, guard_addr));
6388 init = add_stmt_to_compound (init, set_guard (guard));
6390 /* Use atexit to register a function for destroying this static
6392 init = add_stmt_to_compound (init, register_dtor_fn (decl));
6394 finish_expr_stmt (init);
6396 if (flag_threadsafe_statics)
6398 finish_compound_stmt (inner_then_clause);
6399 finish_then_clause (inner_if_stmt);
6400 finish_if_stmt (inner_if_stmt);
6403 if (!targetm.relaxed_ordering || !flag_threadsafe_statics)
6405 finish_compound_stmt (then_clause);
6406 finish_then_clause (if_stmt);
6407 finish_if_stmt (if_stmt);
6411 static_aggregates = tree_cons (init, decl, static_aggregates);
6415 /* Make TYPE a complete type based on INITIAL_VALUE.
6416 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
6417 2 if there was no information (in which case assume 0 if DO_DEFAULT),
6418 3 if the initializer list is empty (in pedantic mode). */
6421 cp_complete_array_type (tree *ptype, tree initial_value, bool do_default)
6424 tree type, elt_type;
6428 unsigned HOST_WIDE_INT i;
6431 /* An array of character type can be initialized from a
6432 brace-enclosed string constant.
6434 FIXME: this code is duplicated from reshape_init. Probably
6435 we should just call reshape_init here? */
6436 if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (*ptype)))
6437 && TREE_CODE (initial_value) == CONSTRUCTOR
6438 && !VEC_empty (constructor_elt, CONSTRUCTOR_ELTS (initial_value)))
6440 VEC(constructor_elt,gc) *v = CONSTRUCTOR_ELTS (initial_value);
6441 tree value = VEC_index (constructor_elt, v, 0)->value;
6443 if (TREE_CODE (value) == STRING_CST
6444 && VEC_length (constructor_elt, v) == 1)
6445 initial_value = value;
6448 /* If any of the elements are parameter packs, we can't actually
6449 complete this type now because the array size is dependent. */
6450 if (TREE_CODE (initial_value) == CONSTRUCTOR)
6452 FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (initial_value),
6455 if (PACK_EXPANSION_P (value))
6461 failure = complete_array_type (ptype, initial_value, do_default);
6463 /* We can create the array before the element type is complete, which
6464 means that we didn't have these two bits set in the original type
6465 either. In completing the type, we are expected to propagate these
6466 bits. See also complete_type which does the same thing for arrays
6469 if (TYPE_DOMAIN (type))
6471 elt_type = TREE_TYPE (type);
6472 TYPE_NEEDS_CONSTRUCTING (type) = TYPE_NEEDS_CONSTRUCTING (elt_type);
6473 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type)
6474 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (elt_type);
6480 /* Return zero if something is declared to be a member of type
6481 CTYPE when in the context of CUR_TYPE. STRING is the error
6482 message to print in that case. Otherwise, quietly return 1. */
6485 member_function_or_else (tree ctype, tree cur_type, enum overload_flags flags)
6487 if (ctype && ctype != cur_type)
6489 if (flags == DTOR_FLAG)
6490 error ("destructor for alien class %qT cannot be a member", ctype);
6492 error ("constructor for alien class %qT cannot be a member", ctype);
6498 /* Subroutine of `grokdeclarator'. */
6500 /* Generate errors possibly applicable for a given set of specifiers.
6501 This is for ARM $7.1.2. */
6504 bad_specifiers (tree object,
6513 error ("%qD declared as a %<virtual%> %s", object, type);
6515 error ("%qD declared as an %<inline%> %s", object, type);
6517 error ("%<const%> and %<volatile%> function specifiers on "
6518 "%qD invalid in %s declaration",
6521 error ("%q+D declared as a friend", object);
6523 && (TREE_CODE (object) == TYPE_DECL
6524 || (!TYPE_PTRFN_P (TREE_TYPE (object))
6525 && !TYPE_REFFN_P (TREE_TYPE (object))
6526 && !TYPE_PTRMEMFUNC_P (TREE_TYPE (object)))))
6527 error ("%q+D declared with an exception specification", object);
6530 /* DECL is a member function or static data member and is presently
6531 being defined. Check that the definition is taking place in a
6535 check_class_member_definition_namespace (tree decl)
6537 /* These checks only apply to member functions and static data
6539 gcc_assert (TREE_CODE (decl) == FUNCTION_DECL
6540 || TREE_CODE (decl) == VAR_DECL);
6541 /* We check for problems with specializations in pt.c in
6542 check_specialization_namespace, where we can issue better
6544 if (processing_specialization)
6546 /* There are no restrictions on the placement of
6547 explicit instantiations. */
6548 if (processing_explicit_instantiation)
6552 A member function definition that appears outside of the
6553 class definition shall appear in a namespace scope enclosing
6554 the class definition.
6558 The definition for a static data member shall appear in a
6559 namespace scope enclosing the member's class definition. */
6560 if (!is_ancestor (current_namespace, DECL_CONTEXT (decl)))
6561 permerror (input_location, "definition of %qD is not in namespace enclosing %qT",
6562 decl, DECL_CONTEXT (decl));
6565 /* Build a PARM_DECL for the "this" parameter. TYPE is the
6566 METHOD_TYPE for a non-static member function; QUALS are the
6567 cv-qualifiers that apply to the function. */
6570 build_this_parm (tree type, cp_cv_quals quals)
6575 cp_cv_quals this_quals;
6577 this_type = TREE_VALUE (TYPE_ARG_TYPES (type));
6578 /* The `this' parameter is implicitly `const'; it cannot be
6580 this_quals = (quals & TYPE_QUAL_RESTRICT) | TYPE_QUAL_CONST;
6581 qual_type = cp_build_qualified_type (this_type, this_quals);
6582 parm = build_artificial_parm (this_identifier, qual_type);
6583 cp_apply_type_quals_to_decl (this_quals, parm);
6587 /* CTYPE is class type, or null if non-class.
6588 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
6590 DECLARATOR is the function's name.
6591 PARMS is a chain of PARM_DECLs for the function.
6592 VIRTUALP is truthvalue of whether the function is virtual or not.
6593 FLAGS are to be passed through to `grokclassfn'.
6594 QUALS are qualifiers indicating whether the function is `const'
6596 RAISES is a list of exceptions that this function can raise.
6597 CHECK is 1 if we must find this method in CTYPE, 0 if we should
6598 not look, and -1 if we should not call `grokclassfn' at all.
6600 SFK is the kind of special function (if any) for the new function.
6602 Returns `NULL_TREE' if something goes wrong, after issuing
6603 applicable error messages. */
6606 grokfndecl (tree ctype,
6610 tree orig_declarator,
6612 enum overload_flags flags,
6619 special_function_kind sfk,
6624 location_t location)
6627 int staticp = ctype && TREE_CODE (type) == FUNCTION_TYPE;
6631 type = build_exception_variant (type, raises);
6633 decl = build_lang_decl (FUNCTION_DECL, declarator, type);
6635 /* If we have an explicit location, use it, otherwise use whatever
6636 build_lang_decl used (probably input_location). */
6637 if (location != UNKNOWN_LOCATION)
6638 DECL_SOURCE_LOCATION (decl) = location;
6640 if (TREE_CODE (type) == METHOD_TYPE)
6643 parm = build_this_parm (type, quals);
6644 TREE_CHAIN (parm) = parms;
6647 DECL_ARGUMENTS (decl) = parms;
6648 for (t = parms; t; t = TREE_CHAIN (t))
6649 DECL_CONTEXT (t) = decl;
6650 /* Propagate volatile out from type to decl. */
6651 if (TYPE_VOLATILE (type))
6652 TREE_THIS_VOLATILE (decl) = 1;
6654 /* Setup decl according to sfk. */
6657 case sfk_constructor:
6658 case sfk_copy_constructor:
6659 case sfk_move_constructor:
6660 DECL_CONSTRUCTOR_P (decl) = 1;
6662 case sfk_destructor:
6663 DECL_DESTRUCTOR_P (decl) = 1;
6669 /* If pointers to member functions use the least significant bit to
6670 indicate whether a function is virtual, ensure a pointer
6671 to this function will have that bit clear. */
6672 if (TARGET_PTRMEMFUNC_VBIT_LOCATION == ptrmemfunc_vbit_in_pfn
6673 && TREE_CODE (type) == METHOD_TYPE
6674 && DECL_ALIGN (decl) < 2 * BITS_PER_UNIT)
6675 DECL_ALIGN (decl) = 2 * BITS_PER_UNIT;
6678 && TREE_CODE (orig_declarator) == TEMPLATE_ID_EXPR)
6682 ("defining explicit specialization %qD in friend declaration",
6686 tree fns = TREE_OPERAND (orig_declarator, 0);
6687 tree args = TREE_OPERAND (orig_declarator, 1);
6689 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
6691 /* Something like `template <class T> friend void f<T>()'. */
6692 error ("invalid use of template-id %qD in declaration "
6693 "of primary template",
6699 /* A friend declaration of the form friend void f<>(). Record
6700 the information in the TEMPLATE_ID_EXPR. */
6701 SET_DECL_IMPLICIT_INSTANTIATION (decl);
6703 if (TREE_CODE (fns) == COMPONENT_REF)
6705 /* Due to bison parser ickiness, we will have already looked
6706 up an operator_name or PFUNCNAME within the current class
6707 (see template_id in parse.y). If the current class contains
6708 such a name, we'll get a COMPONENT_REF here. Undo that. */
6710 gcc_assert (TREE_TYPE (TREE_OPERAND (fns, 0))
6711 == current_class_type);
6712 fns = TREE_OPERAND (fns, 1);
6714 gcc_assert (TREE_CODE (fns) == IDENTIFIER_NODE
6715 || TREE_CODE (fns) == OVERLOAD);
6716 DECL_TEMPLATE_INFO (decl) = tree_cons (fns, args, NULL_TREE);
6718 for (t = TYPE_ARG_TYPES (TREE_TYPE (decl)); t; t = TREE_CHAIN (t))
6719 if (TREE_PURPOSE (t)
6720 && TREE_CODE (TREE_PURPOSE (t)) == DEFAULT_ARG)
6722 error ("default arguments are not allowed in declaration "
6723 "of friend template specialization %qD",
6730 error ("%<inline%> is not allowed in declaration of friend "
6731 "template specialization %qD",
6738 /* If this decl has namespace scope, set that up. */
6740 set_decl_namespace (decl, in_namespace, friendp);
6742 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
6744 /* `main' and builtins have implicit 'C' linkage. */
6745 if ((MAIN_NAME_P (declarator)
6746 || (IDENTIFIER_LENGTH (declarator) > 10
6747 && IDENTIFIER_POINTER (declarator)[0] == '_'
6748 && IDENTIFIER_POINTER (declarator)[1] == '_'
6749 && strncmp (IDENTIFIER_POINTER (declarator)+2, "builtin_", 8) == 0))
6750 && current_lang_name == lang_name_cplusplus
6751 && ctype == NULL_TREE
6752 /* NULL_TREE means global namespace. */
6753 && DECL_CONTEXT (decl) == NULL_TREE)
6754 SET_DECL_LANGUAGE (decl, lang_c);
6756 /* Should probably propagate const out from type to decl I bet (mrs). */
6759 DECL_STATIC_FUNCTION_P (decl) = 1;
6760 DECL_CONTEXT (decl) = ctype;
6765 DECL_CONTEXT (decl) = ctype;
6767 check_class_member_definition_namespace (decl);
6770 if (ctype == NULL_TREE && DECL_MAIN_P (decl))
6772 if (processing_template_decl)
6773 error ("cannot declare %<::main%> to be a template");
6775 error ("cannot declare %<::main%> to be inline");
6777 error ("cannot declare %<::main%> to be static");
6782 /* Members of anonymous types and local classes have no linkage; make
6783 them internal. If a typedef is made later, this will be changed. */
6784 if (ctype && (TYPE_ANONYMOUS_P (ctype)
6785 || decl_function_context (TYPE_MAIN_DECL (ctype))))
6788 if (publicp && cxx_dialect == cxx98)
6790 /* [basic.link]: A name with no linkage (notably, the name of a class
6791 or enumeration declared in a local scope) shall not be used to
6792 declare an entity with linkage.
6794 DR 757 relaxes this restriction for C++0x. */
6795 t = no_linkage_check (TREE_TYPE (decl),
6796 /*relaxed_p=*/false);
6799 if (TYPE_ANONYMOUS_P (t))
6801 if (DECL_EXTERN_C_P (decl))
6802 /* Allow this; it's pretty common in C. */;
6805 permerror (input_location, "non-local function %q#D uses anonymous type",
6807 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
6808 permerror (input_location, "%q+#D does not refer to the unqualified "
6809 "type, so it is not used for linkage",
6814 permerror (input_location, "non-local function %q#D uses local type %qT", decl, t);
6818 TREE_PUBLIC (decl) = publicp;
6821 DECL_INTERFACE_KNOWN (decl) = 1;
6822 DECL_NOT_REALLY_EXTERN (decl) = 1;
6825 /* If the declaration was declared inline, mark it as such. */
6827 DECL_DECLARED_INLINE_P (decl) = 1;
6829 DECL_EXTERNAL (decl) = 1;
6830 if (quals && TREE_CODE (type) == FUNCTION_TYPE)
6833 ? G_("static member function %qD cannot have cv-qualifier")
6834 : G_("non-member function %qD cannot have cv-qualifier"),
6836 quals = TYPE_UNQUALIFIED;
6839 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl))
6840 && !grok_op_properties (decl, /*complain=*/true))
6844 /* Make the init_value nonzero so pushdecl knows this is not
6845 tentative. error_mark_node is replaced later with the BLOCK. */
6846 DECL_INITIAL (decl) = error_mark_node;
6848 if (TYPE_NOTHROW_P (type) || nothrow_libfn_p (decl))
6849 TREE_NOTHROW (decl) = 1;
6851 /* Caller will do the rest of this. */
6855 if (ctype != NULL_TREE)
6856 grokclassfn (ctype, decl, flags);
6858 decl = check_explicit_specialization (orig_declarator, decl,
6861 4 * (friendp != 0));
6862 if (decl == error_mark_node)
6867 cplus_decl_attributes (&decl, *attrlist, 0);
6868 *attrlist = NULL_TREE;
6871 /* Check main's type after attributes have been applied. */
6872 if (ctype == NULL_TREE && DECL_MAIN_P (decl))
6874 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl)),
6877 tree oldtypeargs = TYPE_ARG_TYPES (TREE_TYPE (decl));
6879 error ("%<::main%> must return %<int%>");
6880 newtype = build_function_type (integer_type_node, oldtypeargs);
6881 TREE_TYPE (decl) = newtype;
6884 check_main_parameter_types (decl);
6887 if (ctype != NULL_TREE
6888 && (! TYPE_FOR_JAVA (ctype) || check_java_method (decl))
6891 tree old_decl = check_classfn (ctype, decl,
6892 (processing_template_decl
6893 > template_class_depth (ctype))
6894 ? current_template_parms
6897 if (old_decl == error_mark_node)
6905 if (TREE_CODE (old_decl) == TEMPLATE_DECL)
6906 /* Because grokfndecl is always supposed to return a
6907 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
6908 here. We depend on our callers to figure out that its
6909 really a template that's being returned. */
6910 old_decl = DECL_TEMPLATE_RESULT (old_decl);
6912 if (DECL_STATIC_FUNCTION_P (old_decl)
6913 && TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE)
6914 /* Remove the `this' parm added by grokclassfn.
6915 XXX Isn't this done in start_function, too? */
6916 revert_static_member_fn (decl);
6917 if (DECL_ARTIFICIAL (old_decl))
6919 error ("definition of implicitly-declared %qD", old_decl);
6923 /* Since we've smashed OLD_DECL to its
6924 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
6925 if (TREE_CODE (decl) == TEMPLATE_DECL)
6926 decl = DECL_TEMPLATE_RESULT (decl);
6928 /* Attempt to merge the declarations. This can fail, in
6929 the case of some invalid specialization declarations. */
6930 pushed_scope = push_scope (ctype);
6931 ok = duplicate_decls (decl, old_decl, friendp);
6933 pop_scope (pushed_scope);
6936 error ("no %q#D member function declared in class %qT",
6944 if (DECL_CONSTRUCTOR_P (decl) && !grok_ctor_properties (ctype, decl))
6947 if (ctype == NULL_TREE || check)
6951 DECL_VIRTUAL_P (decl) = 1;
6956 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
6957 the linkage that DECL will receive in the object file. */
6960 set_linkage_for_static_data_member (tree decl)
6962 /* A static data member always has static storage duration and
6963 external linkage. Note that static data members are forbidden in
6964 local classes -- the only situation in which a class has
6965 non-external linkage. */
6966 TREE_PUBLIC (decl) = 1;
6967 TREE_STATIC (decl) = 1;
6968 /* For non-template classes, static data members are always put
6969 out in exactly those files where they are defined, just as
6970 with ordinary namespace-scope variables. */
6971 if (!processing_template_decl)
6972 DECL_INTERFACE_KNOWN (decl) = 1;
6975 /* Create a VAR_DECL named NAME with the indicated TYPE.
6977 If SCOPE is non-NULL, it is the class type or namespace containing
6978 the variable. If SCOPE is NULL, the variable should is created in
6979 the innermost enclosings scope. */
6982 grokvardecl (tree type,
6984 const cp_decl_specifier_seq *declspecs,
6990 tree explicit_scope;
6992 gcc_assert (!name || TREE_CODE (name) == IDENTIFIER_NODE);
6994 /* Compute the scope in which to place the variable, but remember
6995 whether or not that scope was explicitly specified by the user. */
6996 explicit_scope = scope;
6999 /* An explicit "extern" specifier indicates a namespace-scope
7001 if (declspecs->storage_class == sc_extern)
7002 scope = current_namespace;
7003 else if (!at_function_scope_p ())
7004 scope = current_scope ();
7008 && (/* If the variable is a namespace-scope variable declared in a
7009 template, we need DECL_LANG_SPECIFIC. */
7010 (TREE_CODE (scope) == NAMESPACE_DECL && processing_template_decl)
7011 /* Similarly for namespace-scope variables with language linkage
7013 || (TREE_CODE (scope) == NAMESPACE_DECL
7014 && current_lang_name != lang_name_cplusplus)
7015 /* Similarly for static data members. */
7017 decl = build_lang_decl (VAR_DECL, name, type);
7019 decl = build_decl (input_location, VAR_DECL, name, type);
7021 if (explicit_scope && TREE_CODE (explicit_scope) == NAMESPACE_DECL)
7022 set_decl_namespace (decl, explicit_scope, 0);
7024 DECL_CONTEXT (decl) = FROB_CONTEXT (scope);
7026 if (declspecs->storage_class == sc_extern)
7028 DECL_THIS_EXTERN (decl) = 1;
7029 DECL_EXTERNAL (decl) = !initialized;
7032 if (DECL_CLASS_SCOPE_P (decl))
7034 set_linkage_for_static_data_member (decl);
7035 /* This function is only called with out-of-class definitions. */
7036 DECL_EXTERNAL (decl) = 0;
7037 check_class_member_definition_namespace (decl);
7039 /* At top level, either `static' or no s.c. makes a definition
7040 (perhaps tentative), and absence of `static' makes it public. */
7041 else if (toplevel_bindings_p ())
7043 TREE_PUBLIC (decl) = (declspecs->storage_class != sc_static
7044 && (DECL_THIS_EXTERN (decl) || ! constp));
7045 TREE_STATIC (decl) = ! DECL_EXTERNAL (decl);
7047 /* Not at top level, only `static' makes a static definition. */
7050 TREE_STATIC (decl) = declspecs->storage_class == sc_static;
7051 TREE_PUBLIC (decl) = DECL_EXTERNAL (decl);
7054 if (declspecs->specs[(int)ds_thread])
7055 DECL_TLS_MODEL (decl) = decl_default_tls_model (decl);
7057 /* If the type of the decl has no linkage, make sure that we'll
7058 notice that in mark_used. */
7059 if (cxx_dialect > cxx98
7060 && decl_linkage (decl) != lk_none
7061 && DECL_LANG_SPECIFIC (decl) == NULL
7062 && !DECL_EXTERN_C_P (decl)
7063 && no_linkage_check (TREE_TYPE (decl), /*relaxed_p=*/false))
7064 retrofit_lang_decl (decl);
7066 if (TREE_PUBLIC (decl))
7068 /* [basic.link]: A name with no linkage (notably, the name of a class
7069 or enumeration declared in a local scope) shall not be used to
7070 declare an entity with linkage.
7072 DR 757 relaxes this restriction for C++0x. */
7073 tree t = (cxx_dialect > cxx98 ? NULL_TREE
7074 : no_linkage_check (TREE_TYPE (decl), /*relaxed_p=*/false));
7077 if (TYPE_ANONYMOUS_P (t))
7079 if (DECL_EXTERN_C_P (decl))
7080 /* Allow this; it's pretty common in C. */
7084 /* DRs 132, 319 and 389 seem to indicate types with
7085 no linkage can only be used to declare extern "C"
7086 entities. Since it's not always an error in the
7087 ISO C++ 90 Standard, we only issue a warning. */
7088 warning (0, "non-local variable %q#D uses anonymous type",
7090 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
7091 warning (0, "%q+#D does not refer to the unqualified "
7092 "type, so it is not used for linkage",
7097 warning (0, "non-local variable %q#D uses local type %qT", decl, t);
7101 DECL_INTERFACE_KNOWN (decl) = 1;
7106 /* Create and return a canonical pointer to member function type, for
7107 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
7110 build_ptrmemfunc_type (tree type)
7114 tree unqualified_variant = NULL_TREE;
7116 if (type == error_mark_node)
7119 /* If a canonical type already exists for this type, use it. We use
7120 this method instead of type_hash_canon, because it only does a
7121 simple equality check on the list of field members. */
7123 if ((t = TYPE_GET_PTRMEMFUNC_TYPE (type)))
7126 /* Make sure that we always have the unqualified pointer-to-member
7128 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
7130 = build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type));
7132 t = make_class_type (RECORD_TYPE);
7133 xref_basetypes (t, NULL_TREE);
7135 /* Let the front end know this is a pointer to member function... */
7136 TYPE_PTRMEMFUNC_FLAG (t) = 1;
7137 /* ... and not really a class type. */
7138 SET_CLASS_TYPE_P (t, 0);
7140 field = build_decl (input_location, FIELD_DECL, pfn_identifier, type);
7143 field = build_decl (input_location, FIELD_DECL, delta_identifier,
7145 TREE_CHAIN (field) = fields;
7148 finish_builtin_struct (t, "__ptrmemfunc_type", fields, ptr_type_node);
7150 /* Zap out the name so that the back end will give us the debugging
7151 information for this anonymous RECORD_TYPE. */
7152 TYPE_NAME (t) = NULL_TREE;
7154 /* If this is not the unqualified form of this pointer-to-member
7155 type, set the TYPE_MAIN_VARIANT for this type to be the
7156 unqualified type. Since they are actually RECORD_TYPEs that are
7157 not variants of each other, we must do this manually.
7158 As we just built a new type there is no need to do yet another copy. */
7159 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
7161 int type_quals = cp_type_quals (type);
7162 TYPE_READONLY (t) = (type_quals & TYPE_QUAL_CONST) != 0;
7163 TYPE_VOLATILE (t) = (type_quals & TYPE_QUAL_VOLATILE) != 0;
7164 TYPE_RESTRICT (t) = (type_quals & TYPE_QUAL_RESTRICT) != 0;
7165 TYPE_MAIN_VARIANT (t) = unqualified_variant;
7166 TYPE_NEXT_VARIANT (t) = TYPE_NEXT_VARIANT (unqualified_variant);
7167 TYPE_NEXT_VARIANT (unqualified_variant) = t;
7168 TREE_TYPE (TYPE_BINFO (t)) = t;
7171 /* Cache this pointer-to-member type so that we can find it again
7173 TYPE_SET_PTRMEMFUNC_TYPE (type, t);
7175 if (TYPE_STRUCTURAL_EQUALITY_P (type))
7176 SET_TYPE_STRUCTURAL_EQUALITY (t);
7177 else if (TYPE_CANONICAL (type) != type)
7178 TYPE_CANONICAL (t) = build_ptrmemfunc_type (TYPE_CANONICAL (type));
7183 /* Create and return a pointer to data member type. */
7186 build_ptrmem_type (tree class_type, tree member_type)
7188 if (TREE_CODE (member_type) == METHOD_TYPE)
7190 tree arg_types = TYPE_ARG_TYPES (member_type);
7191 cp_cv_quals quals = cp_type_quals (TREE_TYPE (TREE_VALUE (arg_types)));
7192 member_type = build_memfn_type (member_type, class_type, quals);
7193 return build_ptrmemfunc_type (build_pointer_type (member_type));
7197 gcc_assert (TREE_CODE (member_type) != FUNCTION_TYPE);
7198 return build_offset_type (class_type, member_type);
7202 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
7203 Check to see that the definition is valid. Issue appropriate error
7204 messages. Return 1 if the definition is particularly bad, or 0
7208 check_static_variable_definition (tree decl, tree type)
7210 /* Motion 10 at San Diego: If a static const integral data member is
7211 initialized with an integral constant expression, the initializer
7212 may appear either in the declaration (within the class), or in
7213 the definition, but not both. If it appears in the class, the
7214 member is a member constant. The file-scope definition is always
7216 if (!ARITHMETIC_TYPE_P (type) && TREE_CODE (type) != ENUMERAL_TYPE)
7218 error ("invalid in-class initialization of static data member "
7219 "of non-integral type %qT",
7221 /* If we just return the declaration, crashes will sometimes
7222 occur. We therefore return void_type_node, as if this were a
7223 friend declaration, to cause callers to completely ignore
7224 this declaration. */
7227 else if (!CP_TYPE_CONST_P (type))
7228 error ("ISO C++ forbids in-class initialization of non-const "
7229 "static member %qD",
7231 else if (!INTEGRAL_OR_ENUMERATION_TYPE_P (type))
7232 pedwarn (input_location, OPT_pedantic, "ISO C++ forbids initialization of member constant "
7233 "%qD of non-integral type %qT", decl, type);
7238 /* Given the SIZE (i.e., number of elements) in an array, compute an
7239 appropriate index type for the array. If non-NULL, NAME is the
7240 name of the thing being declared. */
7243 compute_array_index_type (tree name, tree size)
7247 tree abi_1_itype = NULL_TREE;
7249 if (error_operand_p (size))
7250 return error_mark_node;
7252 type = TREE_TYPE (size);
7253 /* The array bound must be an integer type. */
7254 if (!dependent_type_p (type) && !INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type))
7257 error ("size of array %qD has non-integral type %qT", name, type);
7259 error ("size of array has non-integral type %qT", type);
7260 size = integer_one_node;
7261 type = TREE_TYPE (size);
7264 /* We can only call value_dependent_expression_p on integral constant
7265 expressions; the parser adds a dummy NOP_EXPR with TREE_SIDE_EFFECTS
7266 set if this isn't one. */
7267 if (processing_template_decl
7268 && (TREE_SIDE_EFFECTS (size) || value_dependent_expression_p (size)))
7270 /* We cannot do any checking for a SIZE that isn't known to be
7271 constant. Just build the index type and mark that it requires
7272 structural equality checks. */
7273 itype = build_index_type (build_min (MINUS_EXPR, sizetype,
7274 size, integer_one_node));
7275 if (!TREE_SIDE_EFFECTS (size))
7277 TYPE_DEPENDENT_P (itype) = 1;
7278 TYPE_DEPENDENT_P_VALID (itype) = 1;
7280 SET_TYPE_STRUCTURAL_EQUALITY (itype);
7284 if (!abi_version_at_least (2) && processing_template_decl)
7285 /* For abi-1, we handled all instances in templates the same way,
7286 even when they were non-dependent. This affects the manglings
7287 produced. So, we do the normal checking for non-dependent
7288 sizes, but at the end we'll return the same type that abi-1
7289 would have, but with TYPE_CANONICAL set to the "right"
7290 value that the current ABI would provide. */
7291 abi_1_itype = build_index_type (build_min (MINUS_EXPR, sizetype,
7292 size, integer_one_node));
7294 /* The size might be the result of a cast. */
7295 STRIP_TYPE_NOPS (size);
7297 /* It might be a const variable or enumeration constant. */
7298 size = integral_constant_value (size);
7300 /* Normally, the array-bound will be a constant. */
7301 if (TREE_CODE (size) == INTEGER_CST)
7303 /* Check to see if the array bound overflowed. Make that an
7304 error, no matter how generous we're being. */
7305 constant_expression_error (size);
7307 /* An array must have a positive number of elements. */
7308 if (INT_CST_LT (size, integer_zero_node))
7311 error ("size of array %qD is negative", name);
7313 error ("size of array is negative");
7314 size = integer_one_node;
7316 /* As an extension we allow zero-sized arrays. We always allow
7317 them in system headers because glibc uses them. */
7318 else if (integer_zerop (size) && !in_system_header)
7321 pedwarn (input_location, OPT_pedantic, "ISO C++ forbids zero-size array %qD", name);
7323 pedwarn (input_location, OPT_pedantic, "ISO C++ forbids zero-size array");
7326 else if (TREE_CONSTANT (size))
7328 /* `(int) &fn' is not a valid array bound. */
7330 error ("size of array %qD is not an integral constant-expression",
7333 error ("size of array is not an integral constant-expression");
7334 size = integer_one_node;
7336 else if (pedantic && warn_vla != 0)
7339 pedwarn (input_location, OPT_Wvla, "ISO C++ forbids variable length array %qD", name);
7341 pedwarn (input_location, OPT_Wvla, "ISO C++ forbids variable length array");
7343 else if (warn_vla > 0)
7347 "variable length array %qD is used", name);
7350 "variable length array is used");
7353 if (processing_template_decl && !TREE_CONSTANT (size))
7354 /* A variable sized array. */
7355 itype = build_min (MINUS_EXPR, sizetype, size, integer_one_node);
7358 HOST_WIDE_INT saved_processing_template_decl;
7360 /* Compute the index of the largest element in the array. It is
7361 one less than the number of elements in the array. We save
7362 and restore PROCESSING_TEMPLATE_DECL so that computations in
7363 cp_build_binary_op will be appropriately folded. */
7364 saved_processing_template_decl = processing_template_decl;
7365 processing_template_decl = 0;
7366 itype = cp_build_binary_op (input_location,
7368 cp_convert (ssizetype, size),
7369 cp_convert (ssizetype, integer_one_node),
7370 tf_warning_or_error);
7371 itype = fold (itype);
7372 processing_template_decl = saved_processing_template_decl;
7374 if (!TREE_CONSTANT (itype))
7375 /* A variable sized array. */
7376 itype = variable_size (itype);
7377 /* Make sure that there was no overflow when creating to a signed
7378 index type. (For example, on a 32-bit machine, an array with
7379 size 2^32 - 1 is too big.) */
7380 else if (TREE_CODE (itype) == INTEGER_CST
7381 && TREE_OVERFLOW (itype))
7383 error ("overflow in array dimension");
7384 TREE_OVERFLOW (itype) = 0;
7388 /* Create and return the appropriate index type. */
7391 tree t = build_index_type (itype);
7392 TYPE_CANONICAL (abi_1_itype) = TYPE_CANONICAL (t);
7396 return build_index_type (itype);
7399 /* Returns the scope (if any) in which the entity declared by
7400 DECLARATOR will be located. If the entity was declared with an
7401 unqualified name, NULL_TREE is returned. */
7404 get_scope_of_declarator (const cp_declarator *declarator)
7406 while (declarator && declarator->kind != cdk_id)
7407 declarator = declarator->declarator;
7409 /* If the declarator-id is a SCOPE_REF, the scope in which the
7410 declaration occurs is the first operand. */
7412 && declarator->u.id.qualifying_scope)
7413 return declarator->u.id.qualifying_scope;
7415 /* Otherwise, the declarator is not a qualified name; the entity will
7416 be declared in the current scope. */
7420 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
7421 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
7425 create_array_type_for_decl (tree name, tree type, tree size)
7427 tree itype = NULL_TREE;
7428 const char* error_msg;
7430 /* If things have already gone awry, bail now. */
7431 if (type == error_mark_node || size == error_mark_node)
7432 return error_mark_node;
7434 /* Assume that everything will go OK. */
7437 /* There are some types which cannot be array elements. */
7438 switch (TREE_CODE (type))
7441 error_msg = "array of void";
7445 error_msg = "array of functions";
7448 case REFERENCE_TYPE:
7449 error_msg = "array of references";
7453 error_msg = "array of function members";
7460 /* If something went wrong, issue an error-message and return. */
7464 error ("declaration of %qD as %s", name, error_msg);
7466 error ("creating %s", error_msg);
7468 return error_mark_node;
7473 The constant expressions that specify the bounds of the arrays
7474 can be omitted only for the first member of the sequence. */
7475 if (TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type))
7478 error ("declaration of %qD as multidimensional array must "
7479 "have bounds for all dimensions except the first",
7482 error ("multidimensional array must have bounds for all "
7483 "dimensions except the first");
7485 return error_mark_node;
7488 /* Figure out the index type for the array. */
7490 itype = compute_array_index_type (name, size);
7493 T is called the array element type; this type shall not be [...] an
7494 abstract class type. */
7495 abstract_virtuals_error (name, type);
7497 return build_cplus_array_type (type, itype);
7500 /* Check that it's OK to declare a function with the indicated TYPE.
7501 SFK indicates the kind of special function (if any) that this
7502 function is. OPTYPE is the type given in a conversion operator
7503 declaration, or the class type for a constructor/destructor.
7504 Returns the actual return type of the function; that
7505 may be different than TYPE if an error occurs, or for certain
7506 special functions. */
7509 check_special_function_return_type (special_function_kind sfk,
7515 case sfk_constructor:
7517 error ("return type specification for constructor invalid");
7519 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
7520 type = build_pointer_type (optype);
7522 type = void_type_node;
7525 case sfk_destructor:
7527 error ("return type specification for destructor invalid");
7528 /* We can't use the proper return type here because we run into
7529 problems with ambiguous bases and covariant returns.
7530 Java classes are left unchanged because (void *) isn't a valid
7531 Java type, and we don't want to change the Java ABI. */
7532 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
7533 type = build_pointer_type (void_type_node);
7535 type = void_type_node;
7538 case sfk_conversion:
7540 error ("return type specified for %<operator %T%>", optype);
7551 /* A variable or data member (whose unqualified name is IDENTIFIER)
7552 has been declared with the indicated TYPE. If the TYPE is not
7553 acceptable, issue an error message and return a type to use for
7554 error-recovery purposes. */
7557 check_var_type (tree identifier, tree type)
7559 if (VOID_TYPE_P (type))
7562 error ("unnamed variable or field declared void");
7563 else if (TREE_CODE (identifier) == IDENTIFIER_NODE)
7565 gcc_assert (!IDENTIFIER_OPNAME_P (identifier));
7566 error ("variable or field %qE declared void", identifier);
7569 error ("variable or field declared void");
7570 type = error_mark_node;
7576 /* Given declspecs and a declarator (abstract or otherwise), determine
7577 the name and type of the object declared and construct a DECL node
7580 DECLSPECS points to the representation of declaration-specifier
7581 sequence that precedes declarator.
7583 DECL_CONTEXT says which syntactic context this declaration is in:
7584 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
7585 FUNCDEF for a function definition. Like NORMAL but a few different
7586 error messages in each case. Return value may be zero meaning
7587 this definition is too screwy to try to parse.
7588 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
7589 handle member functions (which have FIELD context).
7590 Return value may be zero meaning this definition is too screwy to
7592 PARM for a parameter declaration (either within a function prototype
7593 or before a function body). Make a PARM_DECL, or return void_type_node.
7594 TPARM for a template parameter declaration.
7595 CATCHPARM for a parameter declaration before a catch clause.
7596 TYPENAME if for a typename (in a cast or sizeof).
7597 Don't make a DECL node; just return the ..._TYPE node.
7598 FIELD for a struct or union field; make a FIELD_DECL.
7599 BITFIELD for a field with specified width.
7601 INITIALIZED is as for start_decl.
7603 ATTRLIST is a pointer to the list of attributes, which may be NULL
7604 if there are none; *ATTRLIST may be modified if attributes from inside
7605 the declarator should be applied to the declaration.
7607 When this function is called, scoping variables (such as
7608 CURRENT_CLASS_TYPE) should reflect the scope in which the
7609 declaration occurs, not the scope in which the new declaration will
7610 be placed. For example, on:
7614 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
7617 Returns a DECL (if a declarator is present), a TYPE (if there is no
7618 declarator, in cases like "struct S;"), or the ERROR_MARK_NODE if an
7622 grokdeclarator (const cp_declarator *declarator,
7623 const cp_decl_specifier_seq *declspecs,
7624 enum decl_context decl_context,
7628 tree type = NULL_TREE;
7630 int virtualp, explicitp, friendp, inlinep, staticp;
7631 int explicit_int = 0;
7632 int explicit_char = 0;
7633 int defaulted_int = 0;
7634 tree dependent_name = NULL_TREE;
7636 tree typedef_decl = NULL_TREE;
7637 const char *name = NULL;
7638 tree typedef_type = NULL_TREE;
7639 /* True if this declarator is a function definition. */
7640 bool funcdef_flag = false;
7641 cp_declarator_kind innermost_code = cdk_error;
7644 /* See the code below that used this. */
7645 tree decl_attr = NULL_TREE;
7648 /* Keep track of what sort of function is being processed
7649 so that we can warn about default return values, or explicit
7650 return values which do not match prescribed defaults. */
7651 special_function_kind sfk = sfk_none;
7653 tree dname = NULL_TREE;
7654 tree ctor_return_type = NULL_TREE;
7655 enum overload_flags flags = NO_SPECIAL;
7656 /* cv-qualifiers that apply to the declarator, for a declaration of
7657 a member function. */
7658 cp_cv_quals memfn_quals = TYPE_UNQUALIFIED;
7659 /* cv-qualifiers that apply to the type specified by the DECLSPECS. */
7661 tree raises = NULL_TREE;
7662 int template_count = 0;
7663 tree returned_attrs = NULL_TREE;
7664 tree parms = NULL_TREE;
7665 const cp_declarator *id_declarator;
7666 /* The unqualified name of the declarator; either an
7667 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
7668 tree unqualified_id;
7669 /* The class type, if any, in which this entity is located,
7670 or NULL_TREE if none. Note that this value may be different from
7671 the current class type; for example if an attempt is made to declare
7672 "A::f" inside "B", this value will be "A". */
7673 tree ctype = current_class_type;
7674 /* The NAMESPACE_DECL for the namespace in which this entity is
7675 located. If an unqualified name is used to declare the entity,
7676 this value will be NULL_TREE, even if the entity is located at
7678 tree in_namespace = NULL_TREE;
7679 cp_storage_class storage_class;
7680 bool unsigned_p, signed_p, short_p, long_p, thread_p;
7681 bool type_was_error_mark_node = false;
7682 bool parameter_pack_p = declarator? declarator->parameter_pack_p : false;
7683 bool template_type_arg = false;
7684 bool template_parm_flag = false;
7685 bool constexpr_p = declspecs->specs[(int) ds_constexpr];
7688 signed_p = declspecs->specs[(int)ds_signed];
7689 unsigned_p = declspecs->specs[(int)ds_unsigned];
7690 short_p = declspecs->specs[(int)ds_short];
7691 long_p = declspecs->specs[(int)ds_long];
7692 longlong = declspecs->specs[(int)ds_long] >= 2;
7693 thread_p = declspecs->specs[(int)ds_thread];
7695 if (decl_context == FUNCDEF)
7696 funcdef_flag = true, decl_context = NORMAL;
7697 else if (decl_context == MEMFUNCDEF)
7698 funcdef_flag = true, decl_context = FIELD;
7699 else if (decl_context == BITFIELD)
7700 bitfield = 1, decl_context = FIELD;
7701 else if (decl_context == TEMPLATE_TYPE_ARG)
7702 template_type_arg = true, decl_context = TYPENAME;
7703 else if (decl_context == TPARM)
7704 template_parm_flag = true, decl_context = PARM;
7706 if (initialized > 1)
7707 funcdef_flag = true;
7709 /* Look inside a declarator for the name being declared
7710 and get it as a string, for an error message. */
7711 for (id_declarator = declarator;
7713 id_declarator = id_declarator->declarator)
7715 if (id_declarator->kind != cdk_id)
7716 innermost_code = id_declarator->kind;
7718 switch (id_declarator->kind)
7721 if (id_declarator->declarator
7722 && id_declarator->declarator->kind == cdk_id)
7724 sfk = id_declarator->declarator->u.id.sfk;
7725 if (sfk == sfk_destructor)
7732 tree qualifying_scope = id_declarator->u.id.qualifying_scope;
7733 tree decl = id_declarator->u.id.unqualified_name;
7736 if (qualifying_scope)
7738 if (at_function_scope_p ())
7742 A declarator-id shall not be qualified except
7745 None of the cases are permitted in block
7747 if (qualifying_scope == global_namespace)
7748 error ("invalid use of qualified-name %<::%D%>",
7750 else if (TYPE_P (qualifying_scope))
7751 error ("invalid use of qualified-name %<%T::%D%>",
7752 qualifying_scope, decl);
7754 error ("invalid use of qualified-name %<%D::%D%>",
7755 qualifying_scope, decl);
7756 return error_mark_node;
7758 else if (TYPE_P (qualifying_scope))
7760 ctype = qualifying_scope;
7761 if (innermost_code != cdk_function
7762 && current_class_type
7763 && !UNIQUELY_DERIVED_FROM_P (ctype,
7764 current_class_type))
7766 error ("type %qT is not derived from type %qT",
7767 ctype, current_class_type);
7768 return error_mark_node;
7771 else if (TREE_CODE (qualifying_scope) == NAMESPACE_DECL)
7772 in_namespace = qualifying_scope;
7774 switch (TREE_CODE (decl))
7780 if (innermost_code != cdk_function)
7782 error ("declaration of %qD as non-function", decl);
7783 return error_mark_node;
7785 else if (!qualifying_scope
7786 && !(current_class_type && at_class_scope_p ()))
7788 error ("declaration of %qD as non-member", decl);
7789 return error_mark_node;
7792 type = TREE_OPERAND (decl, 0);
7794 type = constructor_name (type);
7795 name = identifier_to_locale (IDENTIFIER_POINTER (type));
7800 case TEMPLATE_ID_EXPR:
7802 tree fns = TREE_OPERAND (decl, 0);
7805 if (TREE_CODE (dname) != IDENTIFIER_NODE)
7807 gcc_assert (is_overloaded_fn (dname));
7808 dname = DECL_NAME (get_first_fn (dname));
7813 case IDENTIFIER_NODE:
7814 if (TREE_CODE (decl) == IDENTIFIER_NODE)
7817 if (C_IS_RESERVED_WORD (dname))
7819 error ("declarator-id missing; using reserved word %qD",
7821 name = identifier_to_locale (IDENTIFIER_POINTER (dname));
7823 else if (!IDENTIFIER_TYPENAME_P (dname))
7824 name = identifier_to_locale (IDENTIFIER_POINTER (dname));
7827 gcc_assert (flags == NO_SPECIAL);
7828 flags = TYPENAME_FLAG;
7829 ctor_return_type = TREE_TYPE (dname);
7830 sfk = sfk_conversion;
7831 if (is_typename_at_global_scope (dname))
7832 name = identifier_to_locale (IDENTIFIER_POINTER (dname));
7834 name = "<invalid operator>";
7851 return error_mark_node;
7856 if (id_declarator->kind == cdk_id)
7862 The declarator in a function-definition shall have the form
7863 D1 ( parameter-declaration-clause) ... */
7864 if (funcdef_flag && innermost_code != cdk_function)
7866 error ("function definition does not declare parameters");
7867 return error_mark_node;
7870 if (((dname && IDENTIFIER_OPNAME_P (dname)) || flags == TYPENAME_FLAG)
7871 && innermost_code != cdk_function
7872 && ! (ctype && !declspecs->any_specifiers_p))
7874 error ("declaration of %qD as non-function", dname);
7875 return error_mark_node;
7878 /* Anything declared one level down from the top level
7879 must be one of the parameters of a function
7880 (because the body is at least two levels down). */
7882 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
7883 by not allowing C++ class definitions to specify their parameters
7884 with xdecls (must be spec.d in the parmlist).
7886 Since we now wait to push a class scope until we are sure that
7887 we are in a legitimate method context, we must set oldcname
7888 explicitly (since current_class_name is not yet alive).
7890 We also want to avoid calling this a PARM if it is in a namespace. */
7892 if (decl_context == NORMAL && !toplevel_bindings_p ())
7894 struct cp_binding_level *b = current_binding_level;
7895 current_binding_level = b->level_chain;
7896 if (current_binding_level != 0 && toplevel_bindings_p ())
7897 decl_context = PARM;
7898 current_binding_level = b;
7902 name = decl_context == PARM ? "parameter" : "type name";
7904 /* If there were multiple types specified in the decl-specifier-seq,
7905 issue an error message. */
7906 if (declspecs->multiple_types_p)
7908 error ("two or more data types in declaration of %qs", name);
7909 return error_mark_node;
7912 if (declspecs->conflicting_specifiers_p)
7914 error ("conflicting specifiers in declaration of %qs", name);
7915 return error_mark_node;
7918 /* Extract the basic type from the decl-specifier-seq. */
7919 type = declspecs->type;
7920 if (type == error_mark_node)
7923 type_was_error_mark_node = true;
7925 /* If the entire declaration is itself tagged as deprecated then
7926 suppress reports of deprecated items. */
7927 if (type && TREE_DEPRECATED (type)
7928 && deprecated_state != DEPRECATED_SUPPRESS)
7929 warn_deprecated_use (type, NULL_TREE);
7930 if (type && TREE_CODE (type) == TYPE_DECL)
7932 typedef_decl = type;
7933 type = TREE_TYPE (typedef_decl);
7934 if (TREE_DEPRECATED (type)
7935 && DECL_ARTIFICIAL (typedef_decl)
7936 && deprecated_state != DEPRECATED_SUPPRESS)
7937 warn_deprecated_use (type, NULL_TREE);
7939 /* No type at all: default to `int', and set DEFAULTED_INT
7940 because it was not a user-defined typedef. */
7941 if (type == NULL_TREE && (signed_p || unsigned_p || long_p || short_p))
7943 /* These imply 'int'. */
7944 type = integer_type_node;
7948 explicit_int = declspecs->explicit_int_p;
7949 explicit_char = declspecs->explicit_char_p;
7952 /* See the code below that used this. */
7954 decl_attr = DECL_ATTRIBUTES (typedef_decl);
7956 typedef_type = type;
7959 if (sfk != sfk_conversion)
7960 ctor_return_type = ctype;
7962 if (sfk != sfk_none)
7963 type = check_special_function_return_type (sfk, type,
7965 else if (type == NULL_TREE)
7971 /* We handle `main' specially here, because 'main () { }' is so
7972 common. With no options, it is allowed. With -Wreturn-type,
7973 it is a warning. It is only an error with -pedantic-errors. */
7974 is_main = (funcdef_flag
7975 && dname && MAIN_NAME_P (dname)
7976 && ctype == NULL_TREE
7977 && in_namespace == NULL_TREE
7978 && current_namespace == global_namespace);
7980 if (type_was_error_mark_node)
7981 /* We've already issued an error, don't complain more. */;
7982 else if (in_system_header || flag_ms_extensions)
7983 /* Allow it, sigh. */;
7985 permerror (input_location, "ISO C++ forbids declaration of %qs with no type", name);
7987 pedwarn (input_location, OPT_pedantic,
7988 "ISO C++ forbids declaration of %qs with no type", name);
7990 warning (OPT_Wreturn_type,
7991 "ISO C++ forbids declaration of %qs with no type", name);
7993 type = integer_type_node;
7998 /* Now process the modifiers that were specified
7999 and check for invalid combinations. */
8001 /* Long double is a special combination. */
8002 if (long_p && !longlong && TYPE_MAIN_VARIANT (type) == double_type_node)
8005 type = build_qualified_type (long_double_type_node,
8006 cp_type_quals (type));
8009 /* Check all other uses of type modifiers. */
8011 if (unsigned_p || signed_p || long_p || short_p)
8015 if ((signed_p || unsigned_p) && TREE_CODE (type) != INTEGER_TYPE)
8016 error ("%<signed%> or %<unsigned%> invalid for %qs", name);
8017 else if (signed_p && unsigned_p)
8018 error ("%<signed%> and %<unsigned%> specified together for %qs", name);
8019 else if (longlong && TREE_CODE (type) != INTEGER_TYPE)
8020 error ("%<long long%> invalid for %qs", name);
8021 else if (long_p && TREE_CODE (type) == REAL_TYPE)
8022 error ("%<long%> invalid for %qs", name);
8023 else if (short_p && TREE_CODE (type) == REAL_TYPE)
8024 error ("%<short%> invalid for %qs", name);
8025 else if ((long_p || short_p) && TREE_CODE (type) != INTEGER_TYPE)
8026 error ("%<long%> or %<short%> invalid for %qs", name);
8027 else if ((long_p || short_p) && explicit_char)
8028 error ("%<long%> or %<short%> specified with char for %qs", name);
8029 else if (long_p && short_p)
8030 error ("%<long%> and %<short%> specified together for %qs", name);
8031 else if (type == char16_type_node || type == char32_type_node)
8033 if (signed_p || unsigned_p)
8034 error ("%<signed%> or %<unsigned%> invalid for %qs", name);
8035 else if (short_p || long_p)
8036 error ("%<short%> or %<long%> invalid for %qs", name);
8041 if (!explicit_int && !defaulted_int && !explicit_char && pedantic)
8043 pedwarn (input_location, OPT_pedantic,
8044 "long, short, signed or unsigned used invalidly for %qs",
8046 if (flag_pedantic_errors)
8051 /* Discard the type modifiers if they are invalid. */
8062 /* Decide whether an integer type is signed or not.
8063 Optionally treat bitfields as signed by default. */
8067 It is implementation-defined whether a plain (neither
8068 explicitly signed or unsigned) char, short, int, or long
8069 bit-field is signed or unsigned.
8071 Naturally, we extend this to long long as well. Note that
8072 this does not include wchar_t. */
8073 || (bitfield && !flag_signed_bitfields
8075 /* A typedef for plain `int' without `signed' can be
8076 controlled just like plain `int', but a typedef for
8077 `signed int' cannot be so controlled. */
8079 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl))
8080 && TREE_CODE (type) == INTEGER_TYPE
8081 && !same_type_p (TYPE_MAIN_VARIANT (type), wchar_type_node)))
8084 type = long_long_unsigned_type_node;
8086 type = long_unsigned_type_node;
8088 type = short_unsigned_type_node;
8089 else if (type == char_type_node)
8090 type = unsigned_char_type_node;
8091 else if (typedef_decl)
8092 type = unsigned_type_for (type);
8094 type = unsigned_type_node;
8096 else if (signed_p && type == char_type_node)
8097 type = signed_char_type_node;
8099 type = long_long_integer_type_node;
8101 type = long_integer_type_node;
8103 type = short_integer_type_node;
8105 if (declspecs->specs[(int)ds_complex])
8107 if (TREE_CODE (type) != INTEGER_TYPE && TREE_CODE (type) != REAL_TYPE)
8108 error ("complex invalid for %qs", name);
8109 /* If we just have "complex", it is equivalent to
8110 "complex double", but if any modifiers at all are specified it is
8111 the complex form of TYPE. E.g, "complex short" is
8112 "complex short int". */
8114 else if (defaulted_int && ! longlong
8115 && ! (long_p || short_p || signed_p || unsigned_p))
8116 type = complex_double_type_node;
8117 else if (type == integer_type_node)
8118 type = complex_integer_type_node;
8119 else if (type == float_type_node)
8120 type = complex_float_type_node;
8121 else if (type == double_type_node)
8122 type = complex_double_type_node;
8123 else if (type == long_double_type_node)
8124 type = complex_long_double_type_node;
8126 type = build_complex_type (type);
8129 type_quals = TYPE_UNQUALIFIED;
8130 if (declspecs->specs[(int)ds_const])
8131 type_quals |= TYPE_QUAL_CONST;
8132 /* A `constexpr' specifier used in an object declaration declares
8133 the object as `const'. */
8136 if (innermost_code == cdk_function)
8138 else if (declspecs->specs[(int)ds_const] != 0)
8139 error ("both %<const%> and %<constexpr%> cannot be used here");
8141 type_quals |= TYPE_QUAL_CONST;
8143 if (declspecs->specs[(int)ds_volatile])
8144 type_quals |= TYPE_QUAL_VOLATILE;
8145 if (declspecs->specs[(int)ds_restrict])
8146 type_quals |= TYPE_QUAL_RESTRICT;
8147 if (sfk == sfk_conversion && type_quals != TYPE_UNQUALIFIED)
8148 error ("qualifiers are not allowed on declaration of %<operator %T%>",
8151 if (TREE_CODE (type) == FUNCTION_TYPE
8152 && type_quals != TYPE_UNQUALIFIED)
8154 /* This was an error in C++98 (cv-qualifiers cannot be added to
8155 a function type), but DR 295 makes the code well-formed by
8156 dropping the extra qualifiers. */
8159 tree bad_type = build_qualified_type (type, type_quals);
8160 pedwarn (input_location, OPT_pedantic,
8161 "ignoring %qV qualifiers added to function type %qT",
8164 type_quals = TYPE_UNQUALIFIED;
8166 type_quals |= cp_type_quals (type);
8167 type = cp_build_qualified_type_real
8168 (type, type_quals, ((typedef_decl && !DECL_ARTIFICIAL (typedef_decl)
8169 ? tf_ignore_bad_quals : 0) | tf_warning_or_error));
8170 /* We might have ignored or rejected some of the qualifiers. */
8171 type_quals = cp_type_quals (type);
8174 inlinep = !! declspecs->specs[(int)ds_inline];
8175 virtualp = !! declspecs->specs[(int)ds_virtual];
8176 explicitp = !! declspecs->specs[(int)ds_explicit];
8178 storage_class = declspecs->storage_class;
8179 if (storage_class == sc_static)
8180 staticp = 1 + (decl_context == FIELD);
8182 if (virtualp && staticp == 2)
8184 error ("member %qD cannot be declared both virtual and static", dname);
8185 storage_class = sc_none;
8188 friendp = !! declspecs->specs[(int)ds_friend];
8190 if (dependent_name && !friendp)
8192 error ("%<%T::%D%> is not a valid declarator", ctype, dependent_name);
8193 return error_mark_node;
8196 /* Issue errors about use of storage classes for parameters. */
8197 if (decl_context == PARM)
8199 if (declspecs->specs[(int)ds_typedef])
8201 error ("typedef declaration invalid in parameter declaration");
8202 return error_mark_node;
8204 else if (template_parm_flag && storage_class != sc_none)
8206 error ("storage class specified for template parameter %qs", name);
8207 return error_mark_node;
8209 else if (storage_class == sc_static
8210 || storage_class == sc_extern
8212 error ("storage class specifiers invalid in parameter declarations");
8214 if (type_uses_auto (type))
8216 error ("parameter declared %<auto%>");
8217 type = error_mark_node;
8220 /* Function parameters cannot be constexpr. If we saw one, moan
8221 and pretend it wasn't there. */
8224 error ("a parameter cannot be declared %<constexpr%>");
8229 /* Give error if `virtual' is used outside of class declaration. */
8231 && (current_class_name == NULL_TREE || decl_context != FIELD))
8233 error ("%<virtual%> outside class declaration");
8237 /* Static anonymous unions are dealt with here. */
8238 if (staticp && decl_context == TYPENAME
8240 && ANON_AGGR_TYPE_P (declspecs->type))
8241 decl_context = FIELD;
8243 /* Warn about storage classes that are invalid for certain
8244 kinds of declarations (parameters, typenames, etc.). */
8247 && storage_class != sc_extern
8248 && storage_class != sc_static)
8249 || declspecs->specs[(int)ds_typedef]))
8251 error ("multiple storage classes in declaration of %qs", name);
8254 if (decl_context != NORMAL
8255 && ((storage_class != sc_none
8256 && storage_class != sc_mutable)
8259 if ((decl_context == PARM || decl_context == CATCHPARM)
8260 && (storage_class == sc_register
8261 || storage_class == sc_auto))
8263 else if (declspecs->specs[(int)ds_typedef])
8265 else if (decl_context == FIELD
8266 /* C++ allows static class elements. */
8267 && storage_class == sc_static)
8268 /* C++ also allows inlines and signed and unsigned elements,
8269 but in those cases we don't come in here. */
8273 if (decl_context == FIELD)
8274 error ("storage class specified for %qs", name);
8277 if (decl_context == PARM || decl_context == CATCHPARM)
8278 error ("storage class specified for parameter %qs", name);
8280 error ("storage class specified for typename");
8282 if (storage_class == sc_register
8283 || storage_class == sc_auto
8284 || storage_class == sc_extern
8286 storage_class = sc_none;
8289 else if (storage_class == sc_extern && funcdef_flag
8290 && ! toplevel_bindings_p ())
8291 error ("nested function %qs declared %<extern%>", name);
8292 else if (toplevel_bindings_p ())
8294 if (storage_class == sc_auto)
8295 error ("top-level declaration of %qs specifies %<auto%>", name);
8298 && storage_class != sc_extern
8299 && storage_class != sc_static)
8301 error ("function-scope %qs implicitly auto and declared %<__thread%>",
8306 if (storage_class && friendp)
8308 error ("storage class specifiers invalid in friend function declarations");
8309 storage_class = sc_none;
8314 unqualified_id = NULL_TREE;
8317 unqualified_id = id_declarator->u.id.unqualified_name;
8318 switch (TREE_CODE (unqualified_id))
8321 unqualified_id = TREE_OPERAND (unqualified_id, 0);
8322 if (TYPE_P (unqualified_id))
8323 unqualified_id = constructor_name (unqualified_id);
8326 case IDENTIFIER_NODE:
8327 case TEMPLATE_ID_EXPR:
8335 /* Determine the type of the entity declared by recurring on the
8337 for (; declarator; declarator = declarator->declarator)
8339 const cp_declarator *inner_declarator;
8342 if (type == error_mark_node)
8343 return error_mark_node;
8345 attrs = declarator->attributes;
8351 if (declarator == NULL || declarator->kind == cdk_id)
8352 attr_flags |= (int) ATTR_FLAG_DECL_NEXT;
8353 if (declarator->kind == cdk_function)
8354 attr_flags |= (int) ATTR_FLAG_FUNCTION_NEXT;
8355 if (declarator->kind == cdk_array)
8356 attr_flags |= (int) ATTR_FLAG_ARRAY_NEXT;
8357 returned_attrs = decl_attributes (&type,
8358 chainon (returned_attrs, attrs),
8362 if (declarator->kind == cdk_id)
8365 inner_declarator = declarator->declarator;
8367 switch (declarator->kind)
8370 type = create_array_type_for_decl (dname, type,
8371 declarator->u.array.bounds);
8379 /* Declaring a function type.
8380 Make sure we have a valid type for the function to return. */
8382 if (type_quals != TYPE_UNQUALIFIED)
8384 if (SCALAR_TYPE_P (type) || VOID_TYPE_P (type))
8385 warning (OPT_Wignored_qualifiers,
8386 "type qualifiers ignored on function return type");
8387 /* We now know that the TYPE_QUALS don't apply to the
8388 decl, but to its return type. */
8389 type_quals = TYPE_UNQUALIFIED;
8391 errmsg = targetm.invalid_return_type (type);
8395 type = integer_type_node;
8398 /* Error about some types functions can't return. */
8400 if (TREE_CODE (type) == FUNCTION_TYPE)
8402 error ("%qs declared as function returning a function", name);
8403 return error_mark_node;
8405 if (TREE_CODE (type) == ARRAY_TYPE)
8407 error ("%qs declared as function returning an array", name);
8408 return error_mark_node;
8411 /* Pick up type qualifiers which should be applied to `this'. */
8412 memfn_quals = declarator->u.function.qualifiers;
8414 /* Pick up the exception specifications. */
8415 raises = declarator->u.function.exception_specification;
8417 /* Say it's a definition only for the CALL_EXPR
8418 closest to the identifier. */
8419 funcdecl_p = inner_declarator && inner_declarator->kind == cdk_id;
8421 /* Handle a late-specified return type. */
8424 if (type_uses_auto (type))
8426 if (!declarator->u.function.late_return_type)
8428 error ("%qs function uses %<auto%> type specifier without"
8429 " late return type", name);
8430 return error_mark_node;
8432 else if (!is_auto (type))
8434 error ("%qs function with late return type has"
8435 " %qT as its type rather than plain %<auto%>",
8437 return error_mark_node;
8440 else if (declarator->u.function.late_return_type)
8442 error ("%qs function with late return type not declared"
8443 " with %<auto%> type specifier", name);
8444 return error_mark_node;
8447 type = splice_late_return_type
8448 (type, declarator->u.function.late_return_type);
8449 if (type == error_mark_node)
8450 return error_mark_node;
8452 if (ctype == NULL_TREE
8453 && decl_context == FIELD
8455 && (friendp == 0 || dname == current_class_name))
8456 ctype = current_class_type;
8458 if (ctype && (sfk == sfk_constructor
8459 || sfk == sfk_destructor))
8461 /* We are within a class's scope. If our declarator name
8462 is the same as the class name, and we are defining
8463 a function, then it is a constructor/destructor, and
8464 therefore returns a void type. */
8466 /* ISO C++ 12.4/2. A destructor may not be declared
8467 const or volatile. A destructor may not be
8470 ISO C++ 12.1. A constructor may not be declared
8471 const or volatile. A constructor may not be
8472 virtual. A constructor may not be static. */
8474 error ((flags == DTOR_FLAG)
8475 ? "destructor cannot be static member function"
8476 : "constructor cannot be static member function");
8479 error ((flags == DTOR_FLAG)
8480 ? "destructors may not be cv-qualified"
8481 : "constructors may not be cv-qualified");
8482 memfn_quals = TYPE_UNQUALIFIED;
8485 if (decl_context == FIELD
8486 && !member_function_or_else (ctype,
8489 return error_mark_node;
8491 if (flags != DTOR_FLAG)
8493 /* It's a constructor. */
8498 permerror (input_location, "constructors cannot be declared virtual");
8501 if (decl_context == FIELD
8502 && sfk != sfk_constructor)
8503 return error_mark_node;
8505 if (decl_context == FIELD)
8511 error ("can't initialize friend function %qs", name);
8514 /* Cannot be both friend and virtual. */
8515 error ("virtual functions cannot be friends");
8518 if (decl_context == NORMAL)
8519 error ("friend declaration not in class definition");
8520 if (current_function_decl && funcdef_flag)
8521 error ("can't define friend function %qs in a local "
8525 else if (ctype && sfk == sfk_conversion)
8529 maybe_warn_cpp0x (CPP0X_EXPLICIT_CONVERSION);
8534 /* It is not allowed to use `constexpr' in a function
8535 declaration that is not a definition.
8536 That is too strict, though. */
8537 if (constexpr_p && !funcdef_flag)
8539 error ("the %<constexpr%> specifier cannot be used in "
8540 "a function declaration that is not a definition");
8541 constexpr_p = false;
8544 /* A constexpr non-static member function is implicitly const. */
8545 if (constexpr_p && decl_context == FIELD && staticp == 0
8546 && sfk != sfk_constructor && sfk != sfk_destructor)
8547 memfn_quals |= TYPE_QUAL_CONST;
8549 arg_types = grokparms (declarator->u.function.parameters,
8552 if (inner_declarator
8553 && inner_declarator->kind == cdk_id
8554 && inner_declarator->u.id.sfk == sfk_destructor
8555 && arg_types != void_list_node)
8557 error ("destructors may not have parameters");
8558 arg_types = void_list_node;
8562 type = build_function_type (type, arg_types);
8569 /* Filter out pointers-to-references and references-to-references.
8570 We can get these if a TYPE_DECL is used. */
8572 if (TREE_CODE (type) == REFERENCE_TYPE)
8574 if (declarator->kind != cdk_reference)
8576 error ("cannot declare pointer to %q#T", type);
8577 type = TREE_TYPE (type);
8580 /* In C++0x, we allow reference to reference declarations
8581 that occur indirectly through typedefs [7.1.3/8 dcl.typedef]
8582 and template type arguments [14.3.1/4 temp.arg.type]. The
8583 check for direct reference to reference declarations, which
8584 are still forbidden, occurs below. Reasoning behind the change
8585 can be found in DR106, DR540, and the rvalue reference
8587 else if (cxx_dialect == cxx98)
8589 error ("cannot declare reference to %q#T", type);
8590 type = TREE_TYPE (type);
8593 else if (VOID_TYPE_P (type))
8595 if (declarator->kind == cdk_reference)
8596 error ("cannot declare reference to %q#T", type);
8597 else if (declarator->kind == cdk_ptrmem)
8598 error ("cannot declare pointer to %q#T member", type);
8601 /* We now know that the TYPE_QUALS don't apply to the decl,
8602 but to the target of the pointer. */
8603 type_quals = TYPE_UNQUALIFIED;
8605 if (declarator->kind == cdk_ptrmem
8606 && (TREE_CODE (type) == FUNCTION_TYPE
8607 || (memfn_quals && TREE_CODE (type) == METHOD_TYPE)))
8609 memfn_quals |= cp_type_quals (type);
8610 type = build_memfn_type (type,
8611 declarator->u.pointer.class_type,
8613 memfn_quals = TYPE_UNQUALIFIED;
8616 if (TREE_CODE (type) == FUNCTION_TYPE
8617 && cp_type_quals (type) != TYPE_UNQUALIFIED)
8618 error ("cannot declare %s to qualified function type %qT",
8619 declarator->kind == cdk_reference ? "reference" : "pointer",
8622 if (declarator->kind == cdk_reference)
8624 /* In C++0x, the type we are creating a reference to might be
8625 a typedef which is itself a reference type. In that case,
8626 we follow the reference collapsing rules in
8627 [7.1.3/8 dcl.typedef] to create the final reference type:
8629 "If a typedef TD names a type that is a reference to a type
8630 T, an attempt to create the type 'lvalue reference to cv TD'
8631 creates the type 'lvalue reference to T,' while an attempt
8632 to create the type "rvalue reference to cv TD' creates the
8635 if (!VOID_TYPE_P (type))
8636 type = cp_build_reference_type
8637 ((TREE_CODE (type) == REFERENCE_TYPE
8638 ? TREE_TYPE (type) : type),
8639 (declarator->u.reference.rvalue_ref
8640 && (TREE_CODE(type) != REFERENCE_TYPE
8641 || TYPE_REF_IS_RVALUE (type))));
8643 /* In C++0x, we need this check for direct reference to
8644 reference declarations, which are forbidden by
8645 [8.3.2/5 dcl.ref]. Reference to reference declarations
8646 are only allowed indirectly through typedefs and template
8647 type arguments. Example:
8649 void foo(int & &); // invalid ref-to-ref decl
8651 typedef int & int_ref;
8652 void foo(int_ref &); // valid ref-to-ref decl
8654 if (inner_declarator && inner_declarator->kind == cdk_reference)
8655 error ("cannot declare reference to %q#T, which is not "
8656 "a typedef or a template type argument", type);
8658 else if (TREE_CODE (type) == METHOD_TYPE)
8659 type = build_ptrmemfunc_type (build_pointer_type (type));
8660 else if (declarator->kind == cdk_ptrmem)
8662 gcc_assert (TREE_CODE (declarator->u.pointer.class_type)
8664 if (declarator->u.pointer.class_type == error_mark_node)
8665 /* We will already have complained. */
8666 type = error_mark_node;
8668 type = build_ptrmem_type (declarator->u.pointer.class_type,
8672 type = build_pointer_type (type);
8674 /* Process a list of type modifier keywords (such as
8675 const or volatile) that were given inside the `*' or `&'. */
8677 if (declarator->u.pointer.qualifiers)
8680 = cp_build_qualified_type (type,
8681 declarator->u.pointer.qualifiers);
8682 type_quals = cp_type_quals (type);
8695 if (unqualified_id && TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR
8696 && TREE_CODE (type) != FUNCTION_TYPE
8697 && TREE_CODE (type) != METHOD_TYPE)
8699 error ("template-id %qD used as a declarator",
8701 unqualified_id = dname;
8704 /* If TYPE is a FUNCTION_TYPE, but the function name was explicitly
8705 qualified with a class-name, turn it into a METHOD_TYPE, unless
8706 we know that the function is static. We take advantage of this
8707 opportunity to do other processing that pertains to entities
8708 explicitly declared to be class members. Note that if DECLARATOR
8709 is non-NULL, we know it is a cdk_id declarator; otherwise, we
8710 would not have exited the loop above. */
8712 && declarator->u.id.qualifying_scope
8713 && TYPE_P (declarator->u.id.qualifying_scope))
8717 ctype = declarator->u.id.qualifying_scope;
8718 ctype = TYPE_MAIN_VARIANT (ctype);
8720 while (t != NULL_TREE && CLASS_TYPE_P (t))
8722 /* You're supposed to have one `template <...>' for every
8723 template class, but you don't need one for a full
8724 specialization. For example:
8726 template <class T> struct S{};
8727 template <> struct S<int> { void f(); };
8728 void S<int>::f () {}
8730 is correct; there shouldn't be a `template <>' for the
8731 definition of `S<int>::f'. */
8732 if (CLASSTYPE_TEMPLATE_SPECIALIZATION (t)
8733 && !any_dependent_template_arguments_p (CLASSTYPE_TI_ARGS (t)))
8734 /* T is an explicit (not partial) specialization. All
8735 containing classes must therefore also be explicitly
8738 if ((CLASSTYPE_USE_TEMPLATE (t) || CLASSTYPE_IS_TEMPLATE (t))
8739 && PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (t)))
8740 template_count += 1;
8742 t = TYPE_MAIN_DECL (t);
8743 t = DECL_CONTEXT (t);
8746 if (ctype == current_class_type)
8750 permerror (input_location, "member functions are implicitly friends of their class");
8754 permerror (declarator->id_loc,
8755 "extra qualification %<%T::%> on member %qs",
8758 else if (/* If the qualifying type is already complete, then we
8759 can skip the following checks. */
8760 !COMPLETE_TYPE_P (ctype)
8761 && (/* If the function is being defined, then
8762 qualifying type must certainly be complete. */
8764 /* A friend declaration of "T::f" is OK, even if
8765 "T" is a template parameter. But, if this
8766 function is not a friend, the qualifying type
8768 || (!friendp && !CLASS_TYPE_P (ctype))
8769 /* For a declaration, the type need not be
8770 complete, if either it is dependent (since there
8771 is no meaningful definition of complete in that
8772 case) or the qualifying class is currently being
8774 || !(dependent_type_p (ctype)
8775 || currently_open_class (ctype)))
8776 /* Check that the qualifying type is complete. */
8777 && !complete_type_or_else (ctype, NULL_TREE))
8778 return error_mark_node;
8779 else if (TREE_CODE (type) == FUNCTION_TYPE)
8781 tree sname = declarator->u.id.unqualified_name;
8783 if (current_class_type
8784 && (!friendp || funcdef_flag))
8787 ? "cannot define member function %<%T::%s%> within %<%T%>"
8788 : "cannot declare member function %<%T::%s%> within %<%T%>",
8789 ctype, name, current_class_type);
8790 return error_mark_node;
8793 /* It is not permitted to define a member function outside ist
8794 membership class as `constexpr'. */
8796 error ("a constexpr function cannot be defined "
8797 "outside of its class.");
8799 if (TREE_CODE (sname) == IDENTIFIER_NODE
8800 && NEW_DELETE_OPNAME_P (sname))
8801 /* Overloaded operator new and operator delete
8802 are always static functions. */
8805 type = build_memfn_type (type, ctype, memfn_quals);
8807 else if (declspecs->specs[(int)ds_typedef]
8808 && current_class_type)
8810 error ("cannot declare member %<%T::%s%> within %qT",
8811 ctype, name, current_class_type);
8812 return error_mark_node;
8816 /* Now TYPE has the actual type. */
8821 *attrlist = chainon (returned_attrs, *attrlist);
8823 attrlist = &returned_attrs;
8826 /* Handle parameter packs. */
8827 if (parameter_pack_p)
8829 if (decl_context == PARM)
8830 /* Turn the type into a pack expansion.*/
8831 type = make_pack_expansion (type);
8833 error ("non-parameter %qs cannot be a parameter pack", name);
8836 /* Did array size calculations overflow? */
8838 if (TREE_CODE (type) == ARRAY_TYPE
8839 && COMPLETE_TYPE_P (type)
8840 && TREE_CODE (TYPE_SIZE_UNIT (type)) == INTEGER_CST
8841 && TREE_OVERFLOW (TYPE_SIZE_UNIT (type)))
8843 error ("size of array %qs is too large", name);
8844 /* If we proceed with the array type as it is, we'll eventually
8845 crash in tree_low_cst(). */
8846 type = error_mark_node;
8849 if ((decl_context == FIELD || decl_context == PARM)
8850 && !processing_template_decl
8851 && variably_modified_type_p (type, NULL_TREE))
8853 if (decl_context == FIELD)
8854 error ("data member may not have variably modified type %qT", type);
8856 error ("parameter may not have variably modified type %qT", type);
8857 type = error_mark_node;
8860 if (explicitp == 1 || (explicitp && friendp))
8862 /* [dcl.fct.spec] The explicit specifier shall only be used in
8863 declarations of constructors within a class definition. */
8864 error ("only declarations of constructors can be %<explicit%>");
8868 if (storage_class == sc_mutable)
8870 if (decl_context != FIELD || friendp)
8872 error ("non-member %qs cannot be declared %<mutable%>", name);
8873 storage_class = sc_none;
8875 else if (decl_context == TYPENAME || declspecs->specs[(int)ds_typedef])
8877 error ("non-object member %qs cannot be declared %<mutable%>", name);
8878 storage_class = sc_none;
8880 else if (TREE_CODE (type) == FUNCTION_TYPE
8881 || TREE_CODE (type) == METHOD_TYPE)
8883 error ("function %qs cannot be declared %<mutable%>", name);
8884 storage_class = sc_none;
8888 error ("static %qs cannot be declared %<mutable%>", name);
8889 storage_class = sc_none;
8891 else if (type_quals & TYPE_QUAL_CONST)
8893 error ("const %qs cannot be declared %<mutable%>", name);
8894 storage_class = sc_none;
8898 /* If this is declaring a typedef name, return a TYPE_DECL. */
8899 if (declspecs->specs[(int)ds_typedef] && decl_context != TYPENAME)
8903 /* Note that the grammar rejects storage classes
8904 in typenames, fields or parameters. */
8905 if (current_lang_name == lang_name_java)
8906 TYPE_FOR_JAVA (type) = 1;
8908 /* This declaration:
8910 typedef void f(int) const;
8912 declares a function type which is not a member of any
8913 particular class, but which is cv-qualified; for
8914 example "f S::*" declares a pointer to a const-qualified
8915 member function of S. We record the cv-qualification in the
8917 if (memfn_quals && TREE_CODE (type) == FUNCTION_TYPE)
8919 type = cp_build_qualified_type (type, memfn_quals);
8921 /* We have now dealt with these qualifiers. */
8922 memfn_quals = TYPE_UNQUALIFIED;
8925 if (decl_context == FIELD)
8926 decl = build_lang_decl (TYPE_DECL, unqualified_id, type);
8928 decl = build_decl (input_location, TYPE_DECL, unqualified_id, type);
8929 if (id_declarator && declarator->u.id.qualifying_scope) {
8930 error_at (DECL_SOURCE_LOCATION (decl),
8931 "typedef name may not be a nested-name-specifier");
8932 TREE_TYPE (decl) = error_mark_node;
8935 if (decl_context != FIELD)
8937 if (!current_function_decl)
8938 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
8939 else if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (current_function_decl)
8940 || (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P
8941 (current_function_decl)))
8942 /* The TYPE_DECL is "abstract" because there will be
8943 clones of this constructor/destructor, and there will
8944 be copies of this TYPE_DECL generated in those
8946 DECL_ABSTRACT (decl) = 1;
8948 else if (constructor_name_p (unqualified_id, current_class_type))
8949 permerror (input_location, "ISO C++ forbids nested type %qD with same name "
8950 "as enclosing class",
8953 /* If the user declares "typedef struct {...} foo" then the
8954 struct will have an anonymous name. Fill that name in now.
8955 Nothing can refer to it, so nothing needs know about the name
8957 if (type != error_mark_node
8960 && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
8961 && TYPE_ANONYMOUS_P (type)
8962 && cp_type_quals (type) == TYPE_UNQUALIFIED)
8966 /* Replace the anonymous name with the real name everywhere. */
8967 for (t = TYPE_MAIN_VARIANT (type); t; t = TYPE_NEXT_VARIANT (t))
8969 if (ANON_AGGRNAME_P (TYPE_IDENTIFIER (t)))
8971 debug_hooks->set_name (t, decl);
8972 TYPE_NAME (t) = decl;
8976 if (TYPE_LANG_SPECIFIC (type))
8977 TYPE_WAS_ANONYMOUS (type) = 1;
8979 /* If this is a typedef within a template class, the nested
8980 type is a (non-primary) template. The name for the
8981 template needs updating as well. */
8982 if (TYPE_LANG_SPECIFIC (type) && CLASSTYPE_TEMPLATE_INFO (type))
8983 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type))
8984 = TYPE_IDENTIFIER (type);
8986 /* Adjust linkage now that we aren't anonymous anymore. */
8987 set_linkage_according_to_type (type, TYPE_MAIN_DECL (type));
8988 determine_visibility (TYPE_MAIN_DECL (type));
8990 /* FIXME remangle member functions; member functions of a
8991 type with external linkage have external linkage. */
8995 || (typedef_decl && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl)))
8996 C_TYPEDEF_EXPLICITLY_SIGNED (decl) = 1;
8998 bad_specifiers (decl, "type", virtualp,
8999 memfn_quals != TYPE_UNQUALIFIED,
9000 inlinep, friendp, raises != NULL_TREE);
9005 /* Detect the case of an array type of unspecified size
9006 which came, as such, direct from a typedef name.
9007 We must copy the type, so that the array's domain can be
9008 individually set by the object's initializer. */
9010 if (type && typedef_type
9011 && TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type)
9012 && TYPE_MAIN_VARIANT (type) == TYPE_MAIN_VARIANT (typedef_type))
9013 type = build_cplus_array_type (TREE_TYPE (type), NULL_TREE);
9015 /* Detect where we're using a typedef of function type to declare a
9016 function. PARMS will not be set, so we must create it now. */
9018 if (type == typedef_type && TREE_CODE (type) == FUNCTION_TYPE)
9020 tree decls = NULL_TREE;
9023 for (args = TYPE_ARG_TYPES (type);
9024 args && args != void_list_node;
9025 args = TREE_CHAIN (args))
9027 tree decl = cp_build_parm_decl (NULL_TREE, TREE_VALUE (args));
9029 TREE_CHAIN (decl) = decls;
9033 parms = nreverse (decls);
9035 if (decl_context != TYPENAME)
9037 /* A cv-qualifier-seq shall only be part of the function type
9038 for a non-static member function. [8.3.5/4 dcl.fct] */
9039 if (cp_type_quals (type) != TYPE_UNQUALIFIED
9040 && (current_class_type == NULL_TREE || staticp) )
9043 ? G_("qualified function types cannot be used to "
9044 "declare static member functions")
9045 : G_("qualified function types cannot be used to "
9046 "declare free functions"));
9047 type = TYPE_MAIN_VARIANT (type);
9050 /* The qualifiers on the function type become the qualifiers on
9051 the non-static member function. */
9052 memfn_quals |= cp_type_quals (type);
9056 /* If this is a type name (such as, in a cast or sizeof),
9057 compute the type and return it now. */
9059 if (decl_context == TYPENAME)
9061 /* Note that the grammar rejects storage classes
9062 in typenames, fields or parameters. */
9063 if (type_quals != TYPE_UNQUALIFIED)
9064 type_quals = TYPE_UNQUALIFIED;
9066 /* Special case: "friend class foo" looks like a TYPENAME context. */
9069 if (type_quals != TYPE_UNQUALIFIED)
9071 error ("type qualifiers specified for friend class declaration");
9072 type_quals = TYPE_UNQUALIFIED;
9076 error ("%<inline%> specified for friend class declaration");
9082 /* Don't allow friend declaration without a class-key. */
9083 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
9084 permerror (input_location, "template parameters cannot be friends");
9085 else if (TREE_CODE (type) == TYPENAME_TYPE)
9086 permerror (input_location, "friend declaration requires class-key, "
9087 "i.e. %<friend class %T::%D%>",
9088 TYPE_CONTEXT (type), TYPENAME_TYPE_FULLNAME (type));
9090 permerror (input_location, "friend declaration requires class-key, "
9091 "i.e. %<friend %#T%>",
9095 /* Only try to do this stuff if we didn't already give up. */
9096 if (type != integer_type_node)
9098 /* A friendly class? */
9099 if (current_class_type)
9100 make_friend_class (current_class_type, TYPE_MAIN_VARIANT (type),
9103 error ("trying to make class %qT a friend of global scope",
9106 type = void_type_node;
9109 else if (memfn_quals)
9111 if (ctype == NULL_TREE
9112 && TREE_CODE (type) == METHOD_TYPE)
9113 ctype = TYPE_METHOD_BASETYPE (type);
9116 type = build_memfn_type (type, ctype, memfn_quals);
9117 /* Core issue #547: need to allow this in template type args. */
9118 else if (template_type_arg && TREE_CODE (type) == FUNCTION_TYPE)
9119 type = cp_build_qualified_type (type, memfn_quals);
9121 error ("invalid qualifiers on non-member function type");
9126 else if (unqualified_id == NULL_TREE && decl_context != PARM
9127 && decl_context != CATCHPARM
9128 && TREE_CODE (type) != UNION_TYPE
9131 error ("abstract declarator %qT used as declaration", type);
9132 return error_mark_node;
9135 /* Only functions may be declared using an operator-function-id. */
9137 && IDENTIFIER_OPNAME_P (unqualified_id)
9138 && TREE_CODE (type) != FUNCTION_TYPE
9139 && TREE_CODE (type) != METHOD_TYPE)
9141 error ("declaration of %qD as non-function", unqualified_id);
9142 return error_mark_node;
9145 /* We don't check parameter types here because we can emit a better
9146 error message later. */
9147 if (decl_context != PARM)
9149 type = check_var_type (unqualified_id, type);
9150 if (type == error_mark_node)
9151 return error_mark_node;
9154 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
9155 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
9157 if (decl_context == PARM || decl_context == CATCHPARM)
9159 if (ctype || in_namespace)
9160 error ("cannot use %<::%> in parameter declaration");
9162 /* A parameter declared as an array of T is really a pointer to T.
9163 One declared as a function is really a pointer to a function.
9164 One declared as a member is really a pointer to member. */
9166 if (TREE_CODE (type) == ARRAY_TYPE)
9168 /* Transfer const-ness of array into that of type pointed to. */
9169 type = build_pointer_type (TREE_TYPE (type));
9170 type_quals = TYPE_UNQUALIFIED;
9172 else if (TREE_CODE (type) == FUNCTION_TYPE)
9173 type = build_pointer_type (type);
9179 if (decl_context == PARM)
9181 decl = cp_build_parm_decl (unqualified_id, type);
9183 bad_specifiers (decl, "parameter", virtualp,
9184 memfn_quals != TYPE_UNQUALIFIED,
9185 inlinep, friendp, raises != NULL_TREE);
9187 else if (decl_context == FIELD)
9189 /* The C99 flexible array extension. */
9190 if (!staticp && TREE_CODE (type) == ARRAY_TYPE
9191 && TYPE_DOMAIN (type) == NULL_TREE)
9193 tree itype = compute_array_index_type (dname, integer_zero_node);
9194 type = build_cplus_array_type (TREE_TYPE (type), itype);
9197 if (type == error_mark_node)
9199 /* Happens when declaring arrays of sizes which
9200 are error_mark_node, for example. */
9203 else if (in_namespace && !friendp)
9205 /* Something like struct S { int N::j; }; */
9206 error ("invalid use of %<::%>");
9207 return error_mark_node;
9209 else if (TREE_CODE (type) == FUNCTION_TYPE)
9212 tree function_context;
9216 if (ctype == NULL_TREE)
9217 ctype = current_class_type;
9219 if (ctype == NULL_TREE)
9221 error ("can't make %qD into a method -- not in a class",
9223 return error_mark_node;
9226 /* ``A union may [ ... ] not [ have ] virtual functions.''
9228 if (virtualp && TREE_CODE (ctype) == UNION_TYPE)
9230 error ("function %qD declared virtual inside a union",
9232 return error_mark_node;
9235 if (NEW_DELETE_OPNAME_P (unqualified_id))
9239 error ("%qD cannot be declared virtual, since it "
9245 else if (staticp < 2)
9246 type = build_memfn_type (type, ctype, memfn_quals);
9249 /* Check that the name used for a destructor makes sense. */
9250 if (sfk == sfk_destructor)
9252 tree uqname = id_declarator->u.id.unqualified_name;
9256 gcc_assert (friendp);
9257 error ("expected qualified name in friend declaration "
9258 "for destructor %qD", uqname);
9259 return error_mark_node;
9262 if (!check_dtor_name (ctype, TREE_OPERAND (uqname, 0)))
9264 error ("declaration of %qD as member of %qT",
9266 return error_mark_node;
9269 error ("a destructor cannot be %<constexpr%>");
9271 else if (sfk == sfk_constructor && friendp)
9273 error ("expected qualified name in friend declaration "
9274 "for constructor %qD",
9275 id_declarator->u.id.unqualified_name);
9276 return error_mark_node;
9279 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
9280 function_context = (ctype != NULL_TREE) ?
9281 decl_function_context (TYPE_MAIN_DECL (ctype)) : NULL_TREE;
9282 publicp = (! friendp || ! staticp)
9283 && function_context == NULL_TREE;
9284 decl = grokfndecl (ctype, type,
9285 TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
9286 ? unqualified_id : dname,
9289 virtualp, flags, memfn_quals, raises,
9290 friendp ? -1 : 0, friendp, publicp,
9291 inlinep || constexpr_p,
9293 funcdef_flag, template_count, in_namespace,
9294 attrlist, declarator->id_loc);
9295 if (decl == NULL_TREE)
9296 return error_mark_node;
9298 /* This clobbers the attrs stored in `decl' from `attrlist'. */
9299 /* The decl and setting of decl_attr is also turned off. */
9300 decl = build_decl_attribute_variant (decl, decl_attr);
9303 /* [class.conv.ctor]
9305 A constructor declared without the function-specifier
9306 explicit that can be called with a single parameter
9307 specifies a conversion from the type of its first
9308 parameter to the type of its class. Such a constructor
9309 is called a converting constructor. */
9311 DECL_NONCONVERTING_P (decl) = 1;
9313 else if (TREE_CODE (type) == METHOD_TYPE)
9315 /* We only get here for friend declarations of
9316 members of other classes. */
9317 /* All method decls are public, so tell grokfndecl to set
9318 TREE_PUBLIC, also. */
9319 decl = grokfndecl (ctype, type,
9320 TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
9321 ? unqualified_id : dname,
9324 virtualp, flags, memfn_quals, raises,
9325 friendp ? -1 : 0, friendp, 1, 0, sfk,
9326 funcdef_flag, template_count, in_namespace,
9328 declarator->id_loc);
9329 if (decl == NULL_TREE)
9330 return error_mark_node;
9332 else if (!staticp && !dependent_type_p (type)
9333 && !COMPLETE_TYPE_P (complete_type (type))
9334 && (TREE_CODE (type) != ARRAY_TYPE || initialized == 0))
9337 error ("field %qD has incomplete type", unqualified_id);
9339 error ("name %qT has incomplete type", type);
9341 /* If we're instantiating a template, tell them which
9342 instantiation made the field's type be incomplete. */
9343 if (current_class_type
9344 && TYPE_NAME (current_class_type)
9345 && IDENTIFIER_TEMPLATE (TYPE_IDENTIFIER (current_class_type))
9347 && declspecs->type == type)
9348 error (" in instantiation of template %qT",
9349 current_class_type);
9351 return error_mark_node;
9357 error ("%qE is neither function nor member function; "
9358 "cannot be declared friend", unqualified_id);
9366 /* Friends are treated specially. */
9367 if (ctype == current_class_type)
9368 ; /* We already issued a permerror. */
9369 else if (decl && DECL_NAME (decl))
9371 if (template_class_depth (current_class_type) == 0)
9373 decl = check_explicit_specialization
9374 (unqualified_id, decl, template_count,
9375 2 * funcdef_flag + 4);
9376 if (decl == error_mark_node)
9377 return error_mark_node;
9380 DECL_DECLARED_CONSTEXPR_P (decl) = constexpr_p;
9381 decl = do_friend (ctype, unqualified_id, decl,
9387 return error_mark_node;
9390 /* Structure field. It may not be a function, except for C++. */
9392 if (decl == NULL_TREE)
9398 /* An attempt is being made to initialize a non-static
9399 member. But, from [class.mem]:
9401 4 A member-declarator can contain a
9402 constant-initializer only if it declares a static
9403 member (_class.static_) of integral or enumeration
9404 type, see _class.static.data_.
9406 This used to be relatively common practice, but
9407 the rest of the compiler does not correctly
9408 handle the initialization unless the member is
9409 static so we make it static below. */
9410 permerror (input_location, "ISO C++ forbids initialization of member %qD",
9412 permerror (input_location, "making %qD static", unqualified_id);
9416 if (uses_template_parms (type))
9417 /* We'll check at instantiation time. */
9419 else if (check_static_variable_definition (unqualified_id,
9421 /* If we just return the declaration, crashes
9422 will sometimes occur. We therefore return
9423 void_type_node, as if this was a friend
9424 declaration, to cause callers to completely
9425 ignore this declaration. */
9426 return error_mark_node;
9431 /* C++ allows static class members. All other work
9432 for this is done by grokfield. */
9433 decl = build_lang_decl (VAR_DECL, unqualified_id, type);
9434 set_linkage_for_static_data_member (decl);
9435 /* Even if there is an in-class initialization, DECL
9436 is considered undefined until an out-of-class
9437 definition is provided. */
9438 DECL_EXTERNAL (decl) = 1;
9441 DECL_TLS_MODEL (decl) = decl_default_tls_model (decl);
9446 error ("non-static data member %qE declared %<constexpr%>",
9448 decl = build_decl (input_location,
9449 FIELD_DECL, unqualified_id, type);
9450 DECL_NONADDRESSABLE_P (decl) = bitfield;
9451 if (bitfield && !unqualified_id)
9452 TREE_NO_WARNING (decl) = 1;
9454 if (storage_class == sc_mutable)
9456 DECL_MUTABLE_P (decl) = 1;
9457 storage_class = sc_none;
9461 bad_specifiers (decl, "field", virtualp,
9462 memfn_quals != TYPE_UNQUALIFIED,
9463 inlinep, friendp, raises != NULL_TREE);
9466 else if (TREE_CODE (type) == FUNCTION_TYPE
9467 || TREE_CODE (type) == METHOD_TYPE)
9472 if (!unqualified_id)
9473 return error_mark_node;
9475 if (TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR)
9476 original_name = dname;
9478 original_name = unqualified_id;
9480 if (storage_class == sc_auto)
9481 error ("storage class %<auto%> invalid for function %qs", name);
9482 else if (storage_class == sc_register)
9483 error ("storage class %<register%> invalid for function %qs", name);
9485 error ("storage class %<__thread%> invalid for function %qs", name);
9487 /* Function declaration not at top level.
9488 Storage classes other than `extern' are not allowed
9489 and `extern' makes no difference. */
9490 if (! toplevel_bindings_p ()
9491 && (storage_class == sc_static
9492 || declspecs->specs[(int)ds_inline])
9495 if (storage_class == sc_static)
9496 pedwarn (input_location, OPT_pedantic,
9497 "%<static%> specified invalid for function %qs "
9498 "declared out of global scope", name);
9500 pedwarn (input_location, OPT_pedantic,
9501 "%<inline%> specifier invalid for function %qs "
9502 "declared out of global scope", name);
9505 if (ctype != NULL_TREE
9506 && TREE_CODE (ctype) != NAMESPACE_DECL && !MAYBE_CLASS_TYPE_P (ctype))
9508 error ("%q#T is not a class or a namespace", ctype);
9512 if (ctype == NULL_TREE)
9516 error ("virtual non-class function %qs", name);
9519 else if (sfk == sfk_constructor
9520 || sfk == sfk_destructor)
9523 ? "%qs defined in a non-class scope"
9524 : "%qs declared in a non-class scope", name);
9528 else if (TREE_CODE (type) == FUNCTION_TYPE && staticp < 2
9529 && !NEW_DELETE_OPNAME_P (original_name))
9530 type = build_method_type_directly (ctype,
9532 TYPE_ARG_TYPES (type));
9534 /* Record presence of `static'. */
9535 publicp = (ctype != NULL_TREE
9536 || storage_class == sc_extern
9537 || storage_class != sc_static);
9539 decl = grokfndecl (ctype, type, original_name, parms, unqualified_id,
9540 virtualp, flags, memfn_quals, raises,
9542 publicp, inlinep || constexpr_p, sfk, funcdef_flag,
9543 template_count, in_namespace, attrlist,
9544 declarator->id_loc);
9545 if (decl == NULL_TREE)
9546 return error_mark_node;
9550 int invalid_static = 0;
9552 /* Don't allow a static member function in a class, and forbid
9553 declaring main to be static. */
9554 if (TREE_CODE (type) == METHOD_TYPE)
9556 permerror (input_location, "cannot declare member function %qD to have "
9557 "static linkage", decl);
9560 else if (current_function_decl)
9562 /* FIXME need arm citation */
9563 error ("cannot declare static function inside another function");
9570 storage_class = sc_none;
9576 /* It's a variable. */
9578 /* An uninitialized decl with `extern' is a reference. */
9579 decl = grokvardecl (type, unqualified_id,
9582 (type_quals & TYPE_QUAL_CONST) != 0,
9583 ctype ? ctype : in_namespace);
9584 bad_specifiers (decl, "variable", virtualp,
9585 memfn_quals != TYPE_UNQUALIFIED,
9586 inlinep, friendp, raises != NULL_TREE);
9590 DECL_CONTEXT (decl) = ctype;
9593 permerror (input_location, "%<static%> may not be used when defining "
9594 "(as opposed to declaring) a static data member");
9596 storage_class = sc_none;
9598 if (storage_class == sc_register && TREE_STATIC (decl))
9600 error ("static member %qD declared %<register%>", decl);
9601 storage_class = sc_none;
9603 if (storage_class == sc_extern && pedantic)
9605 pedwarn (input_location, OPT_pedantic,
9606 "cannot explicitly declare member %q#D to have "
9607 "extern linkage", decl);
9608 storage_class = sc_none;
9613 if (storage_class == sc_extern && initialized && !funcdef_flag)
9615 if (toplevel_bindings_p ())
9617 /* It's common practice (and completely valid) to have a const
9618 be initialized and declared extern. */
9619 if (!(type_quals & TYPE_QUAL_CONST))
9620 warning (0, "%qs initialized and declared %<extern%>", name);
9624 error ("%qs has both %<extern%> and initializer", name);
9625 return error_mark_node;
9629 /* Record `register' declaration for warnings on &
9630 and in case doing stupid register allocation. */
9632 if (storage_class == sc_register)
9633 DECL_REGISTER (decl) = 1;
9634 else if (storage_class == sc_extern)
9635 DECL_THIS_EXTERN (decl) = 1;
9636 else if (storage_class == sc_static)
9637 DECL_THIS_STATIC (decl) = 1;
9639 /* Don't forget constexprness. */
9640 if (VAR_OR_FUNCTION_DECL_P (decl))
9641 DECL_DECLARED_CONSTEXPR_P (decl) = constexpr_p;
9643 /* Record constancy and volatility on the DECL itself . There's
9644 no need to do this when processing a template; we'll do this
9645 for the instantiated declaration based on the type of DECL. */
9646 if (!processing_template_decl)
9647 cp_apply_type_quals_to_decl (type_quals, decl);
9653 /* Subroutine of start_function. Ensure that each of the parameter
9654 types (as listed in PARMS) is complete, as is required for a
9655 function definition. */
9658 require_complete_types_for_parms (tree parms)
9660 for (; parms; parms = TREE_CHAIN (parms))
9662 if (dependent_type_p (TREE_TYPE (parms)))
9664 if (!VOID_TYPE_P (TREE_TYPE (parms))
9665 && complete_type_or_else (TREE_TYPE (parms), parms))
9667 relayout_decl (parms);
9668 DECL_ARG_TYPE (parms) = type_passed_as (TREE_TYPE (parms));
9671 /* grokparms or complete_type_or_else will have already issued
9673 TREE_TYPE (parms) = error_mark_node;
9677 /* Returns nonzero if T is a local variable. */
9680 local_variable_p (const_tree t)
9682 if ((TREE_CODE (t) == VAR_DECL
9683 /* A VAR_DECL with a context that is a _TYPE is a static data
9685 && !TYPE_P (CP_DECL_CONTEXT (t))
9686 /* Any other non-local variable must be at namespace scope. */
9687 && !DECL_NAMESPACE_SCOPE_P (t))
9688 || (TREE_CODE (t) == PARM_DECL))
9694 /* Like local_variable_p, but suitable for use as a tree-walking
9698 local_variable_p_walkfn (tree *tp, int *walk_subtrees,
9699 void *data ATTRIBUTE_UNUSED)
9701 if (local_variable_p (*tp) && !DECL_ARTIFICIAL (*tp))
9703 else if (TYPE_P (*tp))
9710 /* Check that ARG, which is a default-argument expression for a
9711 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
9712 something goes wrong. DECL may also be a _TYPE node, rather than a
9713 DECL, if there is no DECL available. */
9716 check_default_argument (tree decl, tree arg)
9721 if (TREE_CODE (arg) == DEFAULT_ARG)
9722 /* We get a DEFAULT_ARG when looking at an in-class declaration
9723 with a default argument. Ignore the argument for now; we'll
9724 deal with it after the class is complete. */
9733 decl_type = TREE_TYPE (decl);
9735 if (arg == error_mark_node
9736 || decl == error_mark_node
9737 || TREE_TYPE (arg) == error_mark_node
9738 || decl_type == error_mark_node)
9739 /* Something already went wrong. There's no need to check
9741 return error_mark_node;
9743 /* [dcl.fct.default]
9745 A default argument expression is implicitly converted to the
9747 if (!TREE_TYPE (arg)
9748 || !can_convert_arg (decl_type, TREE_TYPE (arg), arg, LOOKUP_NORMAL))
9751 error ("default argument for %q#D has type %qT",
9752 decl, TREE_TYPE (arg));
9754 error ("default argument for parameter of type %qT has type %qT",
9755 decl_type, TREE_TYPE (arg));
9757 return error_mark_node;
9760 /* [dcl.fct.default]
9762 Local variables shall not be used in default argument
9765 The keyword `this' shall not be used in a default argument of a
9767 var = cp_walk_tree_without_duplicates (&arg, local_variable_p_walkfn, NULL);
9770 error ("default argument %qE uses local variable %qD", arg, var);
9771 return error_mark_node;
9778 /* Returns a deprecated type used within TYPE, or NULL_TREE if none. */
9781 type_is_deprecated (tree type)
9783 enum tree_code code;
9784 if (TREE_DEPRECATED (type))
9786 if (TYPE_NAME (type)
9787 && TREE_DEPRECATED (TYPE_NAME (type)))
9790 code = TREE_CODE (type);
9792 if (code == POINTER_TYPE || code == REFERENCE_TYPE
9793 || code == OFFSET_TYPE || code == FUNCTION_TYPE
9794 || code == METHOD_TYPE || code == ARRAY_TYPE)
9795 return type_is_deprecated (TREE_TYPE (type));
9797 if (TYPE_PTRMEMFUNC_P (type))
9798 return type_is_deprecated
9799 (TREE_TYPE (TREE_TYPE (TYPE_PTRMEMFUNC_FN_TYPE (type))));
9804 /* Decode the list of parameter types for a function type.
9805 Given the list of things declared inside the parens,
9806 return a list of types.
9808 If this parameter does not end with an ellipsis, we append
9811 *PARMS is set to the chain of PARM_DECLs created. */
9814 grokparms (tree parmlist, tree *parms)
9816 tree result = NULL_TREE;
9817 tree decls = NULL_TREE;
9821 for (parm = parmlist; parm != NULL_TREE; parm = TREE_CHAIN (parm))
9823 tree type = NULL_TREE;
9824 tree init = TREE_PURPOSE (parm);
9825 tree decl = TREE_VALUE (parm);
9828 if (parm == void_list_node)
9831 if (! decl || TREE_TYPE (decl) == error_mark_node)
9834 type = TREE_TYPE (decl);
9835 if (VOID_TYPE_P (type))
9837 if (same_type_p (type, void_type_node)
9838 && DECL_SELF_REFERENCE_P (type)
9839 && !DECL_NAME (decl) && !result && TREE_CHAIN (parm) == void_list_node)
9840 /* this is a parmlist of `(void)', which is ok. */
9842 cxx_incomplete_type_error (decl, type);
9843 /* It's not a good idea to actually create parameters of
9844 type `void'; other parts of the compiler assume that a
9845 void type terminates the parameter list. */
9846 type = error_mark_node;
9847 TREE_TYPE (decl) = error_mark_node;
9850 if (type != error_mark_node
9851 && TYPE_FOR_JAVA (type)
9852 && MAYBE_CLASS_TYPE_P (type))
9854 error ("parameter %qD has Java class type", decl);
9855 type = error_mark_node;
9856 TREE_TYPE (decl) = error_mark_node;
9860 if (type != error_mark_node
9861 && (errmsg = targetm.invalid_parameter_type (type)))
9864 type = error_mark_node;
9865 TREE_TYPE (decl) = error_mark_node;
9868 if (type != error_mark_node)
9870 if (deprecated_state != DEPRECATED_SUPPRESS)
9872 tree deptype = type_is_deprecated (type);
9874 warn_deprecated_use (deptype, NULL_TREE);
9877 /* Top-level qualifiers on the parameters are
9878 ignored for function types. */
9879 type = cp_build_qualified_type (type, 0);
9880 if (TREE_CODE (type) == METHOD_TYPE)
9882 error ("parameter %qD invalidly declared method type", decl);
9883 type = build_pointer_type (type);
9884 TREE_TYPE (decl) = type;
9886 else if (abstract_virtuals_error (decl, type))
9887 any_error = 1; /* Seems like a good idea. */
9888 else if (POINTER_TYPE_P (type))
9890 /* [dcl.fct]/6, parameter types cannot contain pointers
9891 (references) to arrays of unknown bound. */
9892 tree t = TREE_TYPE (type);
9893 int ptr = TYPE_PTR_P (type);
9899 else if (TREE_CODE (t) != ARRAY_TYPE)
9901 else if (!TYPE_DOMAIN (t))
9905 if (TREE_CODE (t) == ARRAY_TYPE)
9906 error ("parameter %qD includes %s to array of unknown "
9908 decl, ptr ? "pointer" : "reference", t);
9913 else if (init && !processing_template_decl)
9914 init = check_default_argument (decl, init);
9917 if (TREE_CODE (decl) == PARM_DECL
9918 && FUNCTION_PARAMETER_PACK_P (decl)
9919 && TREE_CHAIN (parm)
9920 && TREE_CHAIN (parm) != void_list_node)
9921 error ("parameter packs must be at the end of the parameter list");
9923 TREE_CHAIN (decl) = decls;
9925 result = tree_cons (init, type, result);
9927 decls = nreverse (decls);
9928 result = nreverse (result);
9930 result = chainon (result, void_list_node);
9937 /* D is a constructor or overloaded `operator='.
9939 Let T be the class in which D is declared. Then, this function
9942 -1 if D's is an ill-formed constructor or copy assignment operator
9943 whose first parameter is of type `T'.
9944 0 if D is not a copy constructor or copy assignment
9946 1 if D is a copy constructor or copy assignment operator whose
9947 first parameter is a reference to non-const qualified T.
9948 2 if D is a copy constructor or copy assignment operator whose
9949 first parameter is a reference to const qualified T.
9951 This function can be used as a predicate. Positive values indicate
9952 a copy constructor and nonzero values indicate a copy assignment
9956 copy_fn_p (const_tree d)
9962 gcc_assert (DECL_FUNCTION_MEMBER_P (d));
9964 if (TREE_CODE (d) == TEMPLATE_DECL
9965 || (DECL_TEMPLATE_INFO (d)
9966 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d))))
9967 /* Instantiations of template member functions are never copy
9968 functions. Note that member functions of templated classes are
9969 represented as template functions internally, and we must
9970 accept those as copy functions. */
9973 args = FUNCTION_FIRST_USER_PARMTYPE (d);
9977 arg_type = TREE_VALUE (args);
9978 if (arg_type == error_mark_node)
9981 if (TYPE_MAIN_VARIANT (arg_type) == DECL_CONTEXT (d))
9983 /* Pass by value copy assignment operator. */
9986 else if (TREE_CODE (arg_type) == REFERENCE_TYPE
9987 && !TYPE_REF_IS_RVALUE (arg_type)
9988 && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type)) == DECL_CONTEXT (d))
9990 if (CP_TYPE_CONST_P (TREE_TYPE (arg_type)))
9996 args = TREE_CHAIN (args);
9998 if (args && args != void_list_node && !TREE_PURPOSE (args))
9999 /* There are more non-optional args. */
10005 /* D is a constructor or overloaded `operator='.
10007 Let T be the class in which D is declared. Then, this function
10008 returns true when D is a move constructor or move assignment
10009 operator, false otherwise. */
10012 move_fn_p (const_tree d)
10016 bool result = false;
10018 gcc_assert (DECL_FUNCTION_MEMBER_P (d));
10020 if (cxx_dialect == cxx98)
10021 /* There are no move constructors if we are in C++98 mode. */
10024 if (TREE_CODE (d) == TEMPLATE_DECL
10025 || (DECL_TEMPLATE_INFO (d)
10026 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d))))
10027 /* Instantiations of template member functions are never copy
10028 functions. Note that member functions of templated classes are
10029 represented as template functions internally, and we must
10030 accept those as copy functions. */
10033 args = FUNCTION_FIRST_USER_PARMTYPE (d);
10037 arg_type = TREE_VALUE (args);
10038 if (arg_type == error_mark_node)
10041 if (TREE_CODE (arg_type) == REFERENCE_TYPE
10042 && TYPE_REF_IS_RVALUE (arg_type)
10043 && same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (arg_type)),
10047 args = TREE_CHAIN (args);
10049 if (args && args != void_list_node && !TREE_PURPOSE (args))
10050 /* There are more non-optional args. */
10056 /* Remember any special properties of member function DECL. */
10059 grok_special_member_properties (tree decl)
10063 if (!DECL_NONSTATIC_MEMBER_FUNCTION_P (decl))
10066 class_type = DECL_CONTEXT (decl);
10067 if (DECL_CONSTRUCTOR_P (decl))
10069 int ctor = copy_fn_p (decl);
10071 if (!DECL_ARTIFICIAL (decl))
10072 TYPE_HAS_USER_CONSTRUCTOR (class_type) = 1;
10078 A non-template constructor for class X is a copy
10079 constructor if its first parameter is of type X&, const
10080 X&, volatile X& or const volatile X&, and either there
10081 are no other parameters or else all other parameters have
10082 default arguments. */
10083 TYPE_HAS_INIT_REF (class_type) = 1;
10084 if (user_provided_p (decl))
10085 TYPE_HAS_COMPLEX_INIT_REF (class_type) = 1;
10087 TYPE_HAS_CONST_INIT_REF (class_type) = 1;
10089 else if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl)))
10091 TYPE_HAS_DEFAULT_CONSTRUCTOR (class_type) = 1;
10092 if (user_provided_p (decl))
10093 TYPE_HAS_COMPLEX_DFLT (class_type) = 1;
10095 else if (is_list_ctor (decl))
10096 TYPE_HAS_LIST_CTOR (class_type) = 1;
10098 else if (DECL_OVERLOADED_OPERATOR_P (decl) == NOP_EXPR)
10102 A non-template assignment operator for class X is a copy
10103 assignment operator if its parameter is of type X, X&, const
10104 X&, volatile X& or const volatile X&. */
10106 int assop = copy_fn_p (decl);
10110 TYPE_HAS_ASSIGN_REF (class_type) = 1;
10111 if (user_provided_p (decl))
10112 TYPE_HAS_COMPLEX_ASSIGN_REF (class_type) = 1;
10114 TYPE_HAS_CONST_ASSIGN_REF (class_type) = 1;
10119 /* Check a constructor DECL has the correct form. Complains
10120 if the class has a constructor of the form X(X). */
10123 grok_ctor_properties (const_tree ctype, const_tree decl)
10125 int ctor_parm = copy_fn_p (decl);
10131 A declaration of a constructor for a class X is ill-formed if
10132 its first parameter is of type (optionally cv-qualified) X
10133 and either there are no other parameters or else all other
10134 parameters have default arguments.
10136 We *don't* complain about member template instantiations that
10137 have this form, though; they can occur as we try to decide
10138 what constructor to use during overload resolution. Since
10139 overload resolution will never prefer such a constructor to
10140 the non-template copy constructor (which is either explicitly
10141 or implicitly defined), there's no need to worry about their
10142 existence. Theoretically, they should never even be
10143 instantiated, but that's hard to forestall. */
10144 error ("invalid constructor; you probably meant %<%T (const %T&)%>",
10152 /* An operator with this code is unary, but can also be binary. */
10155 ambi_op_p (enum tree_code code)
10157 return (code == INDIRECT_REF
10158 || code == ADDR_EXPR
10159 || code == UNARY_PLUS_EXPR
10160 || code == NEGATE_EXPR
10161 || code == PREINCREMENT_EXPR
10162 || code == PREDECREMENT_EXPR);
10165 /* An operator with this name can only be unary. */
10168 unary_op_p (enum tree_code code)
10170 return (code == TRUTH_NOT_EXPR
10171 || code == BIT_NOT_EXPR
10172 || code == COMPONENT_REF
10173 || code == TYPE_EXPR);
10176 /* DECL is a declaration for an overloaded operator. If COMPLAIN is true,
10177 errors are issued for invalid declarations. */
10180 grok_op_properties (tree decl, bool complain)
10182 tree argtypes = TYPE_ARG_TYPES (TREE_TYPE (decl));
10184 int methodp = (TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE);
10185 tree name = DECL_NAME (decl);
10186 enum tree_code operator_code;
10191 /* Count the number of arguments and check for ellipsis. */
10192 for (argtype = argtypes, arity = 0;
10193 argtype && argtype != void_list_node;
10194 argtype = TREE_CHAIN (argtype))
10196 ellipsis_p = !argtype;
10198 class_type = DECL_CONTEXT (decl);
10199 if (class_type && !CLASS_TYPE_P (class_type))
10200 class_type = NULL_TREE;
10202 if (DECL_CONV_FN_P (decl))
10203 operator_code = TYPE_EXPR;
10207 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
10208 if (ansi_opname (CODE) == name) \
10210 operator_code = (CODE); \
10213 else if (ansi_assopname (CODE) == name) \
10215 operator_code = (CODE); \
10216 DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
10220 #include "operators.def"
10221 #undef DEF_OPERATOR
10223 gcc_unreachable ();
10226 gcc_assert (operator_code != MAX_TREE_CODES);
10227 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
10230 switch (operator_code)
10233 TYPE_HAS_NEW_OPERATOR (class_type) = 1;
10237 TYPE_GETS_DELETE (class_type) |= 1;
10241 TYPE_HAS_ARRAY_NEW_OPERATOR (class_type) = 1;
10244 case VEC_DELETE_EXPR:
10245 TYPE_GETS_DELETE (class_type) |= 2;
10252 /* [basic.std.dynamic.allocation]/1:
10254 A program is ill-formed if an allocation function is declared
10255 in a namespace scope other than global scope or declared static
10258 The same also holds true for deallocation functions. */
10259 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR
10260 || operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
10262 if (DECL_NAMESPACE_SCOPE_P (decl))
10264 if (CP_DECL_CONTEXT (decl) != global_namespace)
10266 error ("%qD may not be declared within a namespace", decl);
10269 else if (!TREE_PUBLIC (decl))
10271 error ("%qD may not be declared as static", decl);
10277 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR)
10279 TREE_TYPE (decl) = coerce_new_type (TREE_TYPE (decl));
10280 DECL_IS_OPERATOR_NEW (decl) = 1;
10282 else if (operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
10283 TREE_TYPE (decl) = coerce_delete_type (TREE_TYPE (decl));
10286 /* An operator function must either be a non-static member function
10287 or have at least one parameter of a class, a reference to a class,
10288 an enumeration, or a reference to an enumeration. 13.4.0.6 */
10289 if (! methodp || DECL_STATIC_FUNCTION_P (decl))
10291 if (operator_code == TYPE_EXPR
10292 || operator_code == CALL_EXPR
10293 || operator_code == COMPONENT_REF
10294 || operator_code == ARRAY_REF
10295 || operator_code == NOP_EXPR)
10297 if (class_type && LAMBDA_TYPE_P (class_type))
10298 /* Lambdas can have static op() and conv ops. */;
10301 error ("%qD must be a nonstatic member function", decl);
10309 if (DECL_STATIC_FUNCTION_P (decl))
10311 error ("%qD must be either a non-static member "
10312 "function or a non-member function", decl);
10316 for (p = argtypes; p && p != void_list_node; p = TREE_CHAIN (p))
10318 tree arg = non_reference (TREE_VALUE (p));
10319 if (arg == error_mark_node)
10322 /* MAYBE_CLASS_TYPE_P, rather than CLASS_TYPE_P, is used
10323 because these checks are performed even on
10324 template functions. */
10325 if (MAYBE_CLASS_TYPE_P (arg)
10326 || TREE_CODE (arg) == ENUMERAL_TYPE)
10330 if (!p || p == void_list_node)
10333 error ("%qD must have an argument of class or "
10334 "enumerated type", decl);
10340 /* There are no restrictions on the arguments to an overloaded
10342 if (operator_code == CALL_EXPR)
10345 /* Warn about conversion operators that will never be used. */
10346 if (IDENTIFIER_TYPENAME_P (name)
10347 && ! DECL_TEMPLATE_INFO (decl)
10349 /* Warn only declaring the function; there is no need to
10350 warn again about out-of-class definitions. */
10351 && class_type == current_class_type)
10353 tree t = TREE_TYPE (name);
10354 int ref = (TREE_CODE (t) == REFERENCE_TYPE);
10355 const char *what = 0;
10358 t = TYPE_MAIN_VARIANT (TREE_TYPE (t));
10360 if (TREE_CODE (t) == VOID_TYPE)
10362 else if (class_type)
10364 if (t == class_type)
10365 what = "the same type";
10366 /* Don't force t to be complete here. */
10367 else if (MAYBE_CLASS_TYPE_P (t)
10368 && COMPLETE_TYPE_P (t)
10369 && DERIVED_FROM_P (t, class_type))
10370 what = "a base class";
10374 warning (OPT_Wconversion, "conversion to %s%s will never use a type "
10375 "conversion operator",
10376 ref ? "a reference to " : "", what);
10379 if (operator_code == COND_EXPR)
10382 error ("ISO C++ prohibits overloading operator ?:");
10385 else if (ellipsis_p)
10387 error ("%qD must not have variable number of arguments", decl);
10390 else if (ambi_op_p (operator_code))
10393 /* We pick the one-argument operator codes by default, so
10394 we don't have to change anything. */
10396 else if (arity == 2)
10398 /* If we thought this was a unary operator, we now know
10399 it to be a binary operator. */
10400 switch (operator_code)
10403 operator_code = MULT_EXPR;
10407 operator_code = BIT_AND_EXPR;
10410 case UNARY_PLUS_EXPR:
10411 operator_code = PLUS_EXPR;
10415 operator_code = MINUS_EXPR;
10418 case PREINCREMENT_EXPR:
10419 operator_code = POSTINCREMENT_EXPR;
10422 case PREDECREMENT_EXPR:
10423 operator_code = POSTDECREMENT_EXPR;
10427 gcc_unreachable ();
10430 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
10432 if ((operator_code == POSTINCREMENT_EXPR
10433 || operator_code == POSTDECREMENT_EXPR)
10434 && ! processing_template_decl
10435 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes)), integer_type_node))
10438 error ("postfix %qD must take %<int%> as its argument",
10441 error ("postfix %qD must take %<int%> as its second "
10449 error ("%qD must take either zero or one argument", decl);
10451 error ("%qD must take either one or two arguments", decl);
10455 /* More Effective C++ rule 6. */
10457 && (operator_code == POSTINCREMENT_EXPR
10458 || operator_code == POSTDECREMENT_EXPR
10459 || operator_code == PREINCREMENT_EXPR
10460 || operator_code == PREDECREMENT_EXPR))
10462 tree arg = TREE_VALUE (argtypes);
10463 tree ret = TREE_TYPE (TREE_TYPE (decl));
10464 if (methodp || TREE_CODE (arg) == REFERENCE_TYPE)
10465 arg = TREE_TYPE (arg);
10466 arg = TYPE_MAIN_VARIANT (arg);
10467 if (operator_code == PREINCREMENT_EXPR
10468 || operator_code == PREDECREMENT_EXPR)
10470 if (TREE_CODE (ret) != REFERENCE_TYPE
10471 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret)),
10473 warning (OPT_Weffc__, "prefix %qD should return %qT", decl,
10474 build_reference_type (arg));
10478 if (!same_type_p (TYPE_MAIN_VARIANT (ret), arg))
10479 warning (OPT_Weffc__, "postfix %qD should return %qT", decl, arg);
10483 else if (unary_op_p (operator_code))
10488 error ("%qD must take %<void%>", decl);
10490 error ("%qD must take exactly one argument", decl);
10494 else /* if (binary_op_p (operator_code)) */
10499 error ("%qD must take exactly one argument", decl);
10501 error ("%qD must take exactly two arguments", decl);
10505 /* More Effective C++ rule 7. */
10507 && (operator_code == TRUTH_ANDIF_EXPR
10508 || operator_code == TRUTH_ORIF_EXPR
10509 || operator_code == COMPOUND_EXPR))
10510 warning (OPT_Weffc__, "user-defined %qD always evaluates both arguments",
10514 /* Effective C++ rule 23. */
10517 && !DECL_ASSIGNMENT_OPERATOR_P (decl)
10518 && (operator_code == PLUS_EXPR
10519 || operator_code == MINUS_EXPR
10520 || operator_code == TRUNC_DIV_EXPR
10521 || operator_code == MULT_EXPR
10522 || operator_code == TRUNC_MOD_EXPR)
10523 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl))) == REFERENCE_TYPE)
10524 warning (OPT_Weffc__, "%qD should return by value", decl);
10526 /* [over.oper]/8 */
10527 for (; argtypes && argtypes != void_list_node;
10528 argtypes = TREE_CHAIN (argtypes))
10529 if (TREE_PURPOSE (argtypes))
10531 TREE_PURPOSE (argtypes) = NULL_TREE;
10532 if (operator_code == POSTINCREMENT_EXPR
10533 || operator_code == POSTDECREMENT_EXPR)
10535 pedwarn (input_location, OPT_pedantic, "%qD cannot have default arguments",
10540 error ("%qD cannot have default arguments", decl);
10548 /* Return a string giving the keyword associate with CODE. */
10550 static const char *
10551 tag_name (enum tag_types code)
10563 case typename_type:
10566 gcc_unreachable ();
10570 /* Name lookup in an elaborated-type-specifier (after the keyword
10571 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
10572 elaborated-type-specifier is invalid, issue a diagnostic and return
10573 error_mark_node; otherwise, return the *_TYPE to which it referred.
10574 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
10577 check_elaborated_type_specifier (enum tag_types tag_code,
10579 bool allow_template_p)
10585 struct S { struct S *p; };
10587 name lookup will find the TYPE_DECL for the implicit "S::S"
10588 typedef. Adjust for that here. */
10589 if (DECL_SELF_REFERENCE_P (decl))
10590 decl = TYPE_NAME (TREE_TYPE (decl));
10592 type = TREE_TYPE (decl);
10594 /* Check TEMPLATE_TYPE_PARM first because DECL_IMPLICIT_TYPEDEF_P
10595 is false for this case as well. */
10596 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
10598 error ("using template type parameter %qT after %qs",
10599 type, tag_name (tag_code));
10600 return error_mark_node;
10604 If the identifier resolves to a typedef-name or a template
10605 type-parameter, the elaborated-type-specifier is ill-formed.
10607 In other words, the only legitimate declaration to use in the
10608 elaborated type specifier is the implicit typedef created when
10609 the type is declared. */
10610 else if (!DECL_IMPLICIT_TYPEDEF_P (decl)
10611 && tag_code != typename_type)
10613 error ("using typedef-name %qD after %qs", decl, tag_name (tag_code));
10614 error ("%q+D has a previous declaration here", decl);
10615 return error_mark_node;
10617 else if (TREE_CODE (type) != RECORD_TYPE
10618 && TREE_CODE (type) != UNION_TYPE
10619 && tag_code != enum_type
10620 && tag_code != typename_type)
10622 error ("%qT referred to as %qs", type, tag_name (tag_code));
10623 error ("%q+T has a previous declaration here", type);
10624 return error_mark_node;
10626 else if (TREE_CODE (type) != ENUMERAL_TYPE
10627 && tag_code == enum_type)
10629 error ("%qT referred to as enum", type);
10630 error ("%q+T has a previous declaration here", type);
10631 return error_mark_node;
10633 else if (!allow_template_p
10634 && TREE_CODE (type) == RECORD_TYPE
10635 && CLASSTYPE_IS_TEMPLATE (type))
10637 /* If a class template appears as elaborated type specifier
10638 without a template header such as:
10640 template <class T> class C {};
10641 void f(class C); // No template header here
10643 then the required template argument is missing. */
10644 error ("template argument required for %<%s %T%>",
10645 tag_name (tag_code),
10646 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type)));
10647 return error_mark_node;
10653 /* Lookup NAME in elaborate type specifier in scope according to
10654 SCOPE and issue diagnostics if necessary.
10655 Return *_TYPE node upon success, NULL_TREE when the NAME is not
10656 found, and ERROR_MARK_NODE for type error. */
10659 lookup_and_check_tag (enum tag_types tag_code, tree name,
10660 tag_scope scope, bool template_header_p)
10664 if (scope == ts_global)
10666 /* First try ordinary name lookup, ignoring hidden class name
10667 injected via friend declaration. */
10668 decl = lookup_name_prefer_type (name, 2);
10669 /* If that fails, the name will be placed in the smallest
10670 non-class, non-function-prototype scope according to 3.3.1/5.
10671 We may already have a hidden name declared as friend in this
10672 scope. So lookup again but not ignoring hidden names.
10673 If we find one, that name will be made visible rather than
10674 creating a new tag. */
10676 decl = lookup_type_scope (name, ts_within_enclosing_non_class);
10679 decl = lookup_type_scope (name, scope);
10681 if (decl && DECL_CLASS_TEMPLATE_P (decl))
10682 decl = DECL_TEMPLATE_RESULT (decl);
10684 if (decl && TREE_CODE (decl) == TYPE_DECL)
10686 /* Look for invalid nested type:
10690 if (scope == ts_current && DECL_SELF_REFERENCE_P (decl))
10692 error ("%qD has the same name as the class in which it is "
10695 return error_mark_node;
10698 /* Two cases we need to consider when deciding if a class
10699 template is allowed as an elaborated type specifier:
10700 1. It is a self reference to its own class.
10701 2. It comes with a template header.
10705 template <class T> class C {
10706 class C *c1; // DECL_SELF_REFERENCE_P is true
10709 template <class U> class C; // template_header_p is true
10710 template <class T> class C<T>::D {
10711 class C *c2; // DECL_SELF_REFERENCE_P is true
10714 t = check_elaborated_type_specifier (tag_code,
10717 | DECL_SELF_REFERENCE_P (decl));
10720 else if (decl && TREE_CODE (decl) == TREE_LIST)
10722 error ("reference to %qD is ambiguous", name);
10723 print_candidates (decl);
10724 return error_mark_node;
10730 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
10731 Define the tag as a forward-reference if it is not defined.
10733 If a declaration is given, process it here, and report an error if
10734 multiple declarations are not identical.
10736 SCOPE is TS_CURRENT when this is also a definition. Only look in
10737 the current frame for the name (since C++ allows new names in any
10738 scope.) It is TS_WITHIN_ENCLOSING_NON_CLASS if this is a friend
10739 declaration. Only look beginning from the current scope outward up
10740 till the nearest non-class scope. Otherwise it is TS_GLOBAL.
10742 TEMPLATE_HEADER_P is true when this declaration is preceded by
10743 a set of template parameters. */
10746 xref_tag (enum tag_types tag_code, tree name,
10747 tag_scope scope, bool template_header_p)
10749 enum tree_code code;
10751 tree context = NULL_TREE;
10753 timevar_push (TV_NAME_LOOKUP);
10755 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
10761 code = RECORD_TYPE;
10767 code = ENUMERAL_TYPE;
10770 gcc_unreachable ();
10773 /* In case of anonymous name, xref_tag is only called to
10774 make type node and push name. Name lookup is not required. */
10775 if (ANON_AGGRNAME_P (name))
10778 t = lookup_and_check_tag (tag_code, name,
10779 scope, template_header_p);
10781 if (t == error_mark_node)
10782 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
10784 if (scope != ts_current && t && current_class_type
10785 && template_class_depth (current_class_type)
10786 && template_header_p)
10788 /* Since SCOPE is not TS_CURRENT, we are not looking at a
10789 definition of this tag. Since, in addition, we are currently
10790 processing a (member) template declaration of a template
10791 class, we must be very careful; consider:
10798 { template <class V>
10799 friend struct S1; };
10801 Here, the S2::S1 declaration should not be confused with the
10802 outer declaration. In particular, the inner version should
10803 have a template parameter of level 2, not level 1. This
10804 would be particularly important if the member declaration
10807 template <class V = U> friend struct S1;
10809 say, when we should tsubst into `U' when instantiating
10810 S2. On the other hand, when presented with:
10820 we must find the inner binding eventually. We
10821 accomplish this by making sure that the new type we
10822 create to represent this declaration has the right
10824 context = TYPE_CONTEXT (t);
10830 /* If no such tag is yet defined, create a forward-reference node
10831 and record it as the "definition".
10832 When a real declaration of this type is found,
10833 the forward-reference will be altered into a real type. */
10834 if (code == ENUMERAL_TYPE)
10836 error ("use of enum %q#D without previous declaration", name);
10837 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
10841 t = make_class_type (code);
10842 TYPE_CONTEXT (t) = context;
10843 t = pushtag (name, t, scope);
10848 if (template_header_p && MAYBE_CLASS_TYPE_P (t))
10850 if (!redeclare_class_template (t, current_template_parms))
10851 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
10853 else if (!processing_template_decl
10854 && CLASS_TYPE_P (t)
10855 && CLASSTYPE_IS_TEMPLATE (t))
10857 error ("redeclaration of %qT as a non-template", t);
10858 error ("previous declaration %q+D", t);
10859 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
10862 /* Make injected friend class visible. */
10863 if (scope != ts_within_enclosing_non_class
10864 && hidden_name_p (TYPE_NAME (t)))
10866 DECL_ANTICIPATED (TYPE_NAME (t)) = 0;
10867 DECL_FRIEND_P (TYPE_NAME (t)) = 0;
10869 if (TYPE_TEMPLATE_INFO (t))
10871 DECL_ANTICIPATED (TYPE_TI_TEMPLATE (t)) = 0;
10872 DECL_FRIEND_P (TYPE_TI_TEMPLATE (t)) = 0;
10877 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, t);
10881 xref_tag_from_type (tree old, tree id, tag_scope scope)
10883 enum tag_types tag_kind;
10885 if (TREE_CODE (old) == RECORD_TYPE)
10886 tag_kind = (CLASSTYPE_DECLARED_CLASS (old) ? class_type : record_type);
10888 tag_kind = union_type;
10890 if (id == NULL_TREE)
10891 id = TYPE_IDENTIFIER (old);
10893 return xref_tag (tag_kind, id, scope, false);
10896 /* Create the binfo hierarchy for REF with (possibly NULL) base list
10897 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
10898 access_* node, and the TREE_VALUE is the type of the base-class.
10899 Non-NULL TREE_TYPE indicates virtual inheritance.
10901 Returns true if the binfo hierarchy was successfully created,
10902 false if an error was detected. */
10905 xref_basetypes (tree ref, tree base_list)
10908 tree binfo, base_binfo;
10909 unsigned max_vbases = 0; /* Maximum direct & indirect virtual bases. */
10910 unsigned max_bases = 0; /* Maximum direct bases. */
10912 tree default_access;
10913 tree igo_prev; /* Track Inheritance Graph Order. */
10915 if (ref == error_mark_node)
10918 /* The base of a derived class is private by default, all others are
10920 default_access = (TREE_CODE (ref) == RECORD_TYPE
10921 && CLASSTYPE_DECLARED_CLASS (ref)
10922 ? access_private_node : access_public_node);
10924 /* First, make sure that any templates in base-classes are
10925 instantiated. This ensures that if we call ourselves recursively
10926 we do not get confused about which classes are marked and which
10928 basep = &base_list;
10931 tree basetype = TREE_VALUE (*basep);
10933 if (!(processing_template_decl && uses_template_parms (basetype))
10934 && !complete_type_or_else (basetype, NULL))
10935 /* An incomplete type. Remove it from the list. */
10936 *basep = TREE_CHAIN (*basep);
10940 if (TREE_TYPE (*basep))
10942 if (CLASS_TYPE_P (basetype))
10943 max_vbases += VEC_length (tree, CLASSTYPE_VBASECLASSES (basetype));
10944 basep = &TREE_CHAIN (*basep);
10948 TYPE_MARKED_P (ref) = 1;
10950 /* The binfo slot should be empty, unless this is an (ill-formed)
10952 gcc_assert (!TYPE_BINFO (ref) || TYPE_SIZE (ref));
10953 gcc_assert (TYPE_MAIN_VARIANT (ref) == ref);
10955 binfo = make_tree_binfo (max_bases);
10957 TYPE_BINFO (ref) = binfo;
10958 BINFO_OFFSET (binfo) = size_zero_node;
10959 BINFO_TYPE (binfo) = ref;
10961 /* Apply base-class info set up to the variants of this type. */
10962 fixup_type_variants (ref);
10966 BINFO_BASE_ACCESSES (binfo) = VEC_alloc (tree, gc, max_bases);
10967 /* An aggregate cannot have baseclasses. */
10968 CLASSTYPE_NON_AGGREGATE (ref) = 1;
10970 if (TREE_CODE (ref) == UNION_TYPE)
10972 error ("derived union %qT invalid", ref);
10979 if (TYPE_FOR_JAVA (ref))
10981 error ("Java class %qT cannot have multiple bases", ref);
10988 CLASSTYPE_VBASECLASSES (ref) = VEC_alloc (tree, gc, max_vbases);
10990 if (TYPE_FOR_JAVA (ref))
10992 error ("Java class %qT cannot have virtual bases", ref);
10997 for (igo_prev = binfo; base_list; base_list = TREE_CHAIN (base_list))
10999 tree access = TREE_PURPOSE (base_list);
11000 int via_virtual = TREE_TYPE (base_list) != NULL_TREE;
11001 tree basetype = TREE_VALUE (base_list);
11003 if (access == access_default_node)
11004 access = default_access;
11006 if (PACK_EXPANSION_P (basetype))
11007 basetype = PACK_EXPANSION_PATTERN (basetype);
11008 if (TREE_CODE (basetype) == TYPE_DECL)
11009 basetype = TREE_TYPE (basetype);
11010 if (!MAYBE_CLASS_TYPE_P (basetype) || TREE_CODE (basetype) == UNION_TYPE)
11012 error ("base type %qT fails to be a struct or class type",
11017 if (TYPE_FOR_JAVA (basetype) && (current_lang_depth () == 0))
11018 TYPE_FOR_JAVA (ref) = 1;
11020 base_binfo = NULL_TREE;
11021 if (CLASS_TYPE_P (basetype) && !dependent_type_p (basetype))
11023 base_binfo = TYPE_BINFO (basetype);
11024 /* The original basetype could have been a typedef'd type. */
11025 basetype = BINFO_TYPE (base_binfo);
11027 /* Inherit flags from the base. */
11028 TYPE_HAS_NEW_OPERATOR (ref)
11029 |= TYPE_HAS_NEW_OPERATOR (basetype);
11030 TYPE_HAS_ARRAY_NEW_OPERATOR (ref)
11031 |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype);
11032 TYPE_GETS_DELETE (ref) |= TYPE_GETS_DELETE (basetype);
11033 TYPE_HAS_CONVERSION (ref) |= TYPE_HAS_CONVERSION (basetype);
11034 CLASSTYPE_DIAMOND_SHAPED_P (ref)
11035 |= CLASSTYPE_DIAMOND_SHAPED_P (basetype);
11036 CLASSTYPE_REPEATED_BASE_P (ref)
11037 |= CLASSTYPE_REPEATED_BASE_P (basetype);
11040 /* We must do this test after we've seen through a typedef
11042 if (TYPE_MARKED_P (basetype))
11044 if (basetype == ref)
11045 error ("recursive type %qT undefined", basetype);
11047 error ("duplicate base type %qT invalid", basetype);
11051 if (PACK_EXPANSION_P (TREE_VALUE (base_list)))
11052 /* Regenerate the pack expansion for the bases. */
11053 basetype = make_pack_expansion (basetype);
11055 TYPE_MARKED_P (basetype) = 1;
11057 base_binfo = copy_binfo (base_binfo, basetype, ref,
11058 &igo_prev, via_virtual);
11059 if (!BINFO_INHERITANCE_CHAIN (base_binfo))
11060 BINFO_INHERITANCE_CHAIN (base_binfo) = binfo;
11062 BINFO_BASE_APPEND (binfo, base_binfo);
11063 BINFO_BASE_ACCESS_APPEND (binfo, access);
11066 if (VEC_space (tree, CLASSTYPE_VBASECLASSES (ref), 1))
11067 /* If we have space in the vbase vector, we must have shared at
11068 least one of them, and are therefore diamond shaped. */
11069 CLASSTYPE_DIAMOND_SHAPED_P (ref) = 1;
11071 /* Unmark all the types. */
11072 for (i = 0; BINFO_BASE_ITERATE (binfo, i, base_binfo); i++)
11073 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
11074 TYPE_MARKED_P (ref) = 0;
11076 /* Now see if we have a repeated base type. */
11077 if (!CLASSTYPE_REPEATED_BASE_P (ref))
11079 for (base_binfo = binfo; base_binfo;
11080 base_binfo = TREE_CHAIN (base_binfo))
11082 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
11084 CLASSTYPE_REPEATED_BASE_P (ref) = 1;
11087 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 1;
11089 for (base_binfo = binfo; base_binfo;
11090 base_binfo = TREE_CHAIN (base_binfo))
11091 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
11092 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
11101 /* Begin compiling the definition of an enumeration type.
11104 UNDERLYING_TYPE is the type that will be used as the storage for
11105 the enumeration type. This should be NULL_TREE if no storage type
11108 SCOPED_ENUM_P is true if this is a scoped enumeration type.
11110 Returns the type object, as yet incomplete.
11111 Also records info about it so that build_enumerator
11112 may be used to declare the individual values as they are read. */
11115 start_enum (tree name, tree underlying_type, bool scoped_enum_p)
11119 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
11121 /* If this is the real definition for a previous forward reference,
11122 fill in the contents in the same object that used to be the
11123 forward reference. */
11125 enumtype = lookup_and_check_tag (enum_type, name,
11126 /*tag_scope=*/ts_current,
11127 /*template_header_p=*/false);
11129 if (enumtype != NULL_TREE && TREE_CODE (enumtype) == ENUMERAL_TYPE)
11131 error_at (input_location, "multiple definition of %q#T", enumtype);
11132 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype)),
11133 "previous definition here");
11134 /* Clear out TYPE_VALUES, and start again. */
11135 TYPE_VALUES (enumtype) = NULL_TREE;
11139 /* In case of error, make a dummy enum to allow parsing to
11141 if (enumtype == error_mark_node)
11142 name = make_anon_name ();
11144 enumtype = cxx_make_type (ENUMERAL_TYPE);
11145 enumtype = pushtag (name, enumtype, /*tag_scope=*/ts_current);
11148 if (enumtype == error_mark_node)
11153 SET_SCOPED_ENUM_P (enumtype, 1);
11154 begin_scope (sk_scoped_enum, enumtype);
11156 /* [C++0x dcl.enum]p5:
11158 If not explicitly specified, the underlying type of a scoped
11159 enumeration type is int. */
11160 if (!underlying_type)
11161 underlying_type = integer_type_node;
11164 if (underlying_type)
11166 if (CP_INTEGRAL_TYPE_P (underlying_type))
11168 TYPE_MIN_VALUE (enumtype) = TYPE_MIN_VALUE (underlying_type);
11169 TYPE_MAX_VALUE (enumtype) = TYPE_MAX_VALUE (underlying_type);
11170 TYPE_SIZE (enumtype) = TYPE_SIZE (underlying_type);
11171 TYPE_SIZE_UNIT (enumtype) = TYPE_SIZE_UNIT (underlying_type);
11172 SET_TYPE_MODE (enumtype, TYPE_MODE (underlying_type));
11173 TYPE_PRECISION (enumtype) = TYPE_PRECISION (underlying_type);
11174 TYPE_ALIGN (enumtype) = TYPE_ALIGN (underlying_type);
11175 TYPE_USER_ALIGN (enumtype) = TYPE_USER_ALIGN (underlying_type);
11176 TYPE_UNSIGNED (enumtype) = TYPE_UNSIGNED (underlying_type);
11177 ENUM_UNDERLYING_TYPE (enumtype) = underlying_type;
11179 else if (!dependent_type_p (underlying_type))
11180 error ("underlying type %<%T%> of %<%T%> must be an integral type",
11181 underlying_type, enumtype);
11187 /* After processing and defining all the values of an enumeration type,
11188 install their decls in the enumeration type and finish it off.
11189 ENUMTYPE is the type object and VALUES a list of name-value pairs. */
11192 finish_enum (tree enumtype)
11201 bool use_short_enum;
11206 tree underlying_type = NULL_TREE;
11207 bool fixed_underlying_type_p
11208 = ENUM_UNDERLYING_TYPE (enumtype) != NULL_TREE;
11210 /* We built up the VALUES in reverse order. */
11211 TYPE_VALUES (enumtype) = nreverse (TYPE_VALUES (enumtype));
11213 /* For an enum defined in a template, just set the type of the values;
11214 all further processing is postponed until the template is
11215 instantiated. We need to set the type so that tsubst of a CONST_DECL
11217 if (processing_template_decl)
11219 for (values = TYPE_VALUES (enumtype);
11221 values = TREE_CHAIN (values))
11222 TREE_TYPE (TREE_VALUE (values)) = enumtype;
11223 if (at_function_scope_p ())
11224 add_stmt (build_min (TAG_DEFN, enumtype));
11225 if (SCOPED_ENUM_P (enumtype))
11230 /* Determine the minimum and maximum values of the enumerators. */
11231 if (TYPE_VALUES (enumtype))
11233 minnode = maxnode = NULL_TREE;
11235 for (values = TYPE_VALUES (enumtype);
11237 values = TREE_CHAIN (values))
11239 decl = TREE_VALUE (values);
11241 /* [dcl.enum]: Following the closing brace of an enum-specifier,
11242 each enumerator has the type of its enumeration. Prior to the
11243 closing brace, the type of each enumerator is the type of its
11244 initializing value. */
11245 TREE_TYPE (decl) = enumtype;
11247 /* Update the minimum and maximum values, if appropriate. */
11248 value = DECL_INITIAL (decl);
11249 if (value == error_mark_node)
11250 value = integer_zero_node;
11251 /* Figure out what the minimum and maximum values of the
11252 enumerators are. */
11254 minnode = maxnode = value;
11255 else if (tree_int_cst_lt (maxnode, value))
11257 else if (tree_int_cst_lt (value, minnode))
11264 If the enumerator-list is empty, the underlying type is as if
11265 the enumeration had a single enumerator with value 0. */
11266 minnode = maxnode = integer_zero_node;
11268 /* Compute the number of bits require to represent all values of the
11269 enumeration. We must do this before the type of MINNODE and
11270 MAXNODE are transformed, since tree_int_cst_min_precision relies
11271 on the TREE_TYPE of the value it is passed. */
11272 unsignedp = tree_int_cst_sgn (minnode) >= 0;
11273 lowprec = tree_int_cst_min_precision (minnode, unsignedp);
11274 highprec = tree_int_cst_min_precision (maxnode, unsignedp);
11275 precision = MAX (lowprec, highprec);
11277 if (!fixed_underlying_type_p)
11279 /* Determine the underlying type of the enumeration.
11283 The underlying type of an enumeration is an integral type that
11284 can represent all the enumerator values defined in the
11285 enumeration. It is implementation-defined which integral type is
11286 used as the underlying type for an enumeration except that the
11287 underlying type shall not be larger than int unless the value of
11288 an enumerator cannot fit in an int or unsigned int.
11290 We use "int" or an "unsigned int" as the underlying type, even if
11291 a smaller integral type would work, unless the user has
11292 explicitly requested that we use the smallest possible type. The
11293 user can request that for all enumerations with a command line
11294 flag, or for just one enumeration with an attribute. */
11296 use_short_enum = flag_short_enums
11297 || lookup_attribute ("packed", TYPE_ATTRIBUTES (enumtype));
11299 for (itk = (use_short_enum ? itk_char : itk_int);
11303 underlying_type = integer_types[itk];
11304 if (TYPE_PRECISION (underlying_type) >= precision
11305 && TYPE_UNSIGNED (underlying_type) == unsignedp)
11308 if (itk == itk_none)
11312 IF no integral type can represent all the enumerator values, the
11313 enumeration is ill-formed. */
11314 error ("no integral type can represent all of the enumerator values "
11315 "for %qT", enumtype);
11316 precision = TYPE_PRECISION (long_long_integer_type_node);
11317 underlying_type = integer_types[itk_unsigned_long_long];
11322 The value of sizeof() applied to an enumeration type, an object
11323 of an enumeration type, or an enumerator, is the value of sizeof()
11324 applied to the underlying type. */
11325 TYPE_SIZE (enumtype) = TYPE_SIZE (underlying_type);
11326 TYPE_SIZE_UNIT (enumtype) = TYPE_SIZE_UNIT (underlying_type);
11327 SET_TYPE_MODE (enumtype, TYPE_MODE (underlying_type));
11328 TYPE_ALIGN (enumtype) = TYPE_ALIGN (underlying_type);
11329 TYPE_USER_ALIGN (enumtype) = TYPE_USER_ALIGN (underlying_type);
11330 TYPE_UNSIGNED (enumtype) = TYPE_UNSIGNED (underlying_type);
11332 /* Set the underlying type of the enumeration type to the
11333 computed enumeration type, restricted to the enumerator
11335 ENUM_UNDERLYING_TYPE (enumtype)
11336 = build_distinct_type_copy (underlying_type);
11337 set_min_and_max_values_for_integral_type
11338 (ENUM_UNDERLYING_TYPE (enumtype), precision, unsignedp);
11341 underlying_type = ENUM_UNDERLYING_TYPE (enumtype);
11343 /* Compute the minimum and maximum values for the type.
11347 For an enumeration where emin is the smallest enumerator and emax
11348 is the largest, the values of the enumeration are the values of the
11349 underlying type in the range bmin to bmax, where bmin and bmax are,
11350 respectively, the smallest and largest values of the smallest bit-
11351 field that can store emin and emax. */
11353 /* The middle-end currently assumes that types with TYPE_PRECISION
11354 narrower than their underlying type are suitably zero or sign
11355 extended to fill their mode. g++ doesn't make these guarantees.
11356 Until the middle-end can represent such paradoxical types, we
11357 set the TYPE_PRECISION to the width of the underlying type. */
11358 TYPE_PRECISION (enumtype) = TYPE_PRECISION (underlying_type);
11360 set_min_and_max_values_for_integral_type (enumtype, precision, unsignedp);
11362 /* Convert each of the enumerators to the type of the underlying
11363 type of the enumeration. */
11364 for (values = TYPE_VALUES (enumtype); values; values = TREE_CHAIN (values))
11366 location_t saved_location;
11368 decl = TREE_VALUE (values);
11369 saved_location = input_location;
11370 input_location = DECL_SOURCE_LOCATION (decl);
11371 if (fixed_underlying_type_p)
11372 /* If the enumeration type has a fixed underlying type, we
11373 already checked all of the enumerator values. */
11374 value = DECL_INITIAL (decl);
11376 value = perform_implicit_conversion (underlying_type,
11377 DECL_INITIAL (decl),
11378 tf_warning_or_error);
11379 input_location = saved_location;
11381 /* Do not clobber shared ints. */
11382 value = copy_node (value);
11384 TREE_TYPE (value) = enumtype;
11385 DECL_INITIAL (decl) = value;
11388 /* Fix up all variant types of this enum type. */
11389 for (t = TYPE_MAIN_VARIANT (enumtype); t; t = TYPE_NEXT_VARIANT (t))
11391 TYPE_VALUES (t) = TYPE_VALUES (enumtype);
11392 TYPE_MIN_VALUE (t) = TYPE_MIN_VALUE (enumtype);
11393 TYPE_MAX_VALUE (t) = TYPE_MAX_VALUE (enumtype);
11394 TYPE_SIZE (t) = TYPE_SIZE (enumtype);
11395 TYPE_SIZE_UNIT (t) = TYPE_SIZE_UNIT (enumtype);
11396 SET_TYPE_MODE (t, TYPE_MODE (enumtype));
11397 TYPE_PRECISION (t) = TYPE_PRECISION (enumtype);
11398 TYPE_ALIGN (t) = TYPE_ALIGN (enumtype);
11399 TYPE_USER_ALIGN (t) = TYPE_USER_ALIGN (enumtype);
11400 TYPE_UNSIGNED (t) = TYPE_UNSIGNED (enumtype);
11401 ENUM_UNDERLYING_TYPE (t) = ENUM_UNDERLYING_TYPE (enumtype);
11404 /* Finish up the scope of a scoped enumeration. */
11405 if (SCOPED_ENUM_P (enumtype))
11408 /* Finish debugging output for this type. */
11409 rest_of_type_compilation (enumtype, namespace_bindings_p ());
11412 /* Build and install a CONST_DECL for an enumeration constant of the
11413 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
11414 Assignment of sequential values by default is handled here. */
11417 build_enumerator (tree name, tree value, tree enumtype)
11423 /* If the VALUE was erroneous, pretend it wasn't there; that will
11424 result in the enum being assigned the next value in sequence. */
11425 if (value == error_mark_node)
11428 /* Remove no-op casts from the value. */
11430 STRIP_TYPE_NOPS (value);
11432 if (! processing_template_decl)
11434 /* Validate and default VALUE. */
11435 if (value != NULL_TREE)
11437 value = integral_constant_value (value);
11439 if (TREE_CODE (value) == INTEGER_CST)
11441 value = perform_integral_promotions (value);
11442 constant_expression_warning (value);
11446 error ("enumerator value for %qD is not an integer constant", name);
11451 /* Default based on previous value. */
11452 if (value == NULL_TREE)
11454 if (TYPE_VALUES (enumtype))
11457 unsigned HOST_WIDE_INT lo;
11461 /* The next value is the previous value plus one.
11462 add_double doesn't know the type of the target expression,
11463 so we must check with int_fits_type_p as well. */
11464 prev_value = DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype)));
11465 if (error_operand_p (prev_value))
11466 value = error_mark_node;
11469 overflowed = add_double (TREE_INT_CST_LOW (prev_value),
11470 TREE_INT_CST_HIGH (prev_value),
11472 value = build_int_cst_wide (TREE_TYPE (prev_value), lo, hi);
11474 |= !int_fits_type_p (value, TREE_TYPE (prev_value));
11478 error ("overflow in enumeration values at %qD", name);
11479 value = error_mark_node;
11484 value = integer_zero_node;
11487 /* Remove no-op casts from the value. */
11488 STRIP_TYPE_NOPS (value);
11490 /* If the underlying type of the enum is fixed, check whether
11491 the enumerator values fits in the underlying type. If it
11492 does not fit, the program is ill-formed [C++0x dcl.enum]. */
11493 if (ENUM_UNDERLYING_TYPE (enumtype)
11495 && TREE_CODE (value) == INTEGER_CST
11496 && !int_fits_type_p (value, ENUM_UNDERLYING_TYPE (enumtype)))
11498 error ("enumerator value %E is too large for underlying type %<%T%>",
11499 value, ENUM_UNDERLYING_TYPE (enumtype));
11501 /* Silently convert the value so that we can continue. */
11502 value = perform_implicit_conversion (ENUM_UNDERLYING_TYPE (enumtype),
11507 /* C++ associates enums with global, function, or class declarations. */
11508 context = current_scope ();
11510 /* Build the actual enumeration constant. Note that the enumeration
11511 constants have the underlying type of the enum (if it is fixed)
11512 or the type of their initializer (if the underlying type of the
11513 enum is not fixed):
11517 If the underlying type is fixed, the type of each enumerator
11518 prior to the closing brace is the underlying type; if the
11519 initializing value of an enumerator cannot be represented by
11520 the underlying type, the program is ill-formed. If the
11521 underlying type is not fixed, the type of each enumerator is
11522 the type of its initializing value.
11524 If the underlying type is not fixed, it will be computed by
11525 finish_enum and we will reset the type of this enumerator. Of
11526 course, if we're processing a template, there may be no value. */
11527 type = value ? TREE_TYPE (value) : NULL_TREE;
11529 if (context && context == current_class_type)
11530 /* This enum declaration is local to the class. We need the full
11531 lang_decl so that we can record DECL_CLASS_CONTEXT, for example. */
11532 decl = build_lang_decl (CONST_DECL, name, type);
11534 /* It's a global enum, or it's local to a function. (Note local to
11535 a function could mean local to a class method. */
11536 decl = build_decl (input_location, CONST_DECL, name, type);
11538 DECL_CONTEXT (decl) = FROB_CONTEXT (context);
11539 TREE_CONSTANT (decl) = 1;
11540 TREE_READONLY (decl) = 1;
11541 DECL_INITIAL (decl) = value;
11543 if (context && context == current_class_type && !SCOPED_ENUM_P (enumtype))
11544 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
11545 on the TYPE_FIELDS list for `S'. (That's so that you can say
11546 things like `S::i' later.) */
11547 finish_member_declaration (decl);
11551 /* Add this enumeration constant to the list for this type. */
11552 TYPE_VALUES (enumtype) = tree_cons (name, decl, TYPE_VALUES (enumtype));
11555 /* Look for an enumerator with the given NAME within the enumeration
11556 type ENUMTYPE. This routine is used primarily for qualified name
11557 lookup into an enumerator in C++0x, e.g.,
11559 enum class Color { Red, Green, Blue };
11561 Color color = Color::Red;
11563 Returns the value corresponding to the enumerator, or
11564 NULL_TREE if no such enumerator was found. */
11566 lookup_enumerator (tree enumtype, tree name)
11569 gcc_assert (enumtype && TREE_CODE (enumtype) == ENUMERAL_TYPE);
11571 e = purpose_member (name, TYPE_VALUES (enumtype));
11572 return e? TREE_VALUE (e) : NULL_TREE;
11576 /* We're defining DECL. Make sure that its type is OK. */
11579 check_function_type (tree decl, tree current_function_parms)
11581 tree fntype = TREE_TYPE (decl);
11582 tree return_type = complete_type (TREE_TYPE (fntype));
11584 /* In a function definition, arg types must be complete. */
11585 require_complete_types_for_parms (current_function_parms);
11587 /* constexpr functions must have literal argument types and
11588 literal return type. */
11589 validate_constexpr_fundecl (decl);
11591 if (dependent_type_p (return_type))
11593 if (!COMPLETE_OR_VOID_TYPE_P (return_type)
11594 || (TYPE_FOR_JAVA (return_type) && MAYBE_CLASS_TYPE_P (return_type)))
11596 tree args = TYPE_ARG_TYPES (fntype);
11598 if (!COMPLETE_OR_VOID_TYPE_P (return_type))
11599 error ("return type %q#T is incomplete", return_type);
11601 error ("return type has Java class type %q#T", return_type);
11603 /* Make it return void instead. */
11604 if (TREE_CODE (fntype) == METHOD_TYPE)
11605 fntype = build_method_type_directly (TREE_TYPE (TREE_VALUE (args)),
11607 TREE_CHAIN (args));
11609 fntype = build_function_type (void_type_node, args);
11611 = build_exception_variant (fntype,
11612 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (decl)));
11613 fntype = (cp_build_type_attribute_variant
11614 (fntype, TYPE_ATTRIBUTES (TREE_TYPE (decl))));
11615 TREE_TYPE (decl) = fntype;
11618 abstract_virtuals_error (decl, TREE_TYPE (fntype));
11621 /* Create the FUNCTION_DECL for a function definition.
11622 DECLSPECS and DECLARATOR are the parts of the declaration;
11623 they describe the function's name and the type it returns,
11624 but twisted together in a fashion that parallels the syntax of C.
11626 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
11627 DECLARATOR is really the DECL for the function we are about to
11628 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
11629 indicating that the function is an inline defined in-class.
11631 This function creates a binding context for the function body
11632 as well as setting up the FUNCTION_DECL in current_function_decl.
11634 For C++, we must first check whether that datum makes any sense.
11635 For example, "class A local_a(1,2);" means that variable local_a
11636 is an aggregate of type A, which should have a constructor
11637 applied to it with the argument list [1, 2].
11639 On entry, DECL_INITIAL (decl1) should be NULL_TREE or error_mark_node,
11640 or may be a BLOCK if the function has been defined previously
11641 in this translation unit. On exit, DECL_INITIAL (decl1) will be
11642 error_mark_node if the function has never been defined, or
11643 a BLOCK if the function has been defined somewhere. */
11646 start_preparsed_function (tree decl1, tree attrs, int flags)
11648 tree ctype = NULL_TREE;
11651 int doing_friend = 0;
11652 struct cp_binding_level *bl;
11653 tree current_function_parms;
11654 struct c_fileinfo *finfo
11655 = get_fileinfo (LOCATION_FILE (DECL_SOURCE_LOCATION (decl1)));
11656 bool honor_interface;
11658 /* Sanity check. */
11659 gcc_assert (TREE_CODE (TREE_VALUE (void_list_node)) == VOID_TYPE);
11660 gcc_assert (TREE_CHAIN (void_list_node) == NULL_TREE);
11662 fntype = TREE_TYPE (decl1);
11663 if (TREE_CODE (fntype) == METHOD_TYPE)
11664 ctype = TYPE_METHOD_BASETYPE (fntype);
11666 /* ISO C++ 11.4/5. A friend function defined in a class is in
11667 the (lexical) scope of the class in which it is defined. */
11668 if (!ctype && DECL_FRIEND_P (decl1))
11670 ctype = DECL_FRIEND_CONTEXT (decl1);
11672 /* CTYPE could be null here if we're dealing with a template;
11673 for example, `inline friend float foo()' inside a template
11674 will have no CTYPE set. */
11675 if (ctype && TREE_CODE (ctype) != RECORD_TYPE)
11681 if (DECL_DECLARED_INLINE_P (decl1)
11682 && lookup_attribute ("noinline", attrs))
11683 warning (0, "inline function %q+D given attribute noinline", decl1);
11685 /* Handle gnu_inline attribute. */
11686 if (GNU_INLINE_P (decl1))
11688 DECL_EXTERNAL (decl1) = 1;
11689 DECL_NOT_REALLY_EXTERN (decl1) = 0;
11690 DECL_INTERFACE_KNOWN (decl1) = 1;
11691 DECL_DISREGARD_INLINE_LIMITS (decl1) = 1;
11694 if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1))
11695 /* This is a constructor, we must ensure that any default args
11696 introduced by this definition are propagated to the clones
11697 now. The clones are used directly in overload resolution. */
11698 adjust_clone_args (decl1);
11700 /* Sometimes we don't notice that a function is a static member, and
11701 build a METHOD_TYPE for it. Fix that up now. */
11702 if (ctype != NULL_TREE && DECL_STATIC_FUNCTION_P (decl1)
11703 && TREE_CODE (TREE_TYPE (decl1)) == METHOD_TYPE)
11705 revert_static_member_fn (decl1);
11709 /* Set up current_class_type, and enter the scope of the class, if
11712 push_nested_class (ctype);
11713 else if (DECL_STATIC_FUNCTION_P (decl1))
11714 push_nested_class (DECL_CONTEXT (decl1));
11716 /* Now that we have entered the scope of the class, we must restore
11717 the bindings for any template parameters surrounding DECL1, if it
11718 is an inline member template. (Order is important; consider the
11719 case where a template parameter has the same name as a field of
11720 the class.) It is not until after this point that
11721 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
11722 if (flags & SF_INCLASS_INLINE)
11723 maybe_begin_member_template_processing (decl1);
11725 /* Effective C++ rule 15. */
11727 && DECL_OVERLOADED_OPERATOR_P (decl1) == NOP_EXPR
11728 && TREE_CODE (TREE_TYPE (fntype)) == VOID_TYPE)
11729 warning (OPT_Weffc__, "%<operator=%> should return a reference to %<*this%>");
11731 /* Make the init_value nonzero so pushdecl knows this is not tentative.
11732 error_mark_node is replaced below (in poplevel) with the BLOCK. */
11733 if (!DECL_INITIAL (decl1))
11734 DECL_INITIAL (decl1) = error_mark_node;
11736 /* This function exists in static storage.
11737 (This does not mean `static' in the C sense!) */
11738 TREE_STATIC (decl1) = 1;
11740 /* We must call push_template_decl after current_class_type is set
11741 up. (If we are processing inline definitions after exiting a
11742 class scope, current_class_type will be NULL_TREE until set above
11743 by push_nested_class.) */
11744 if (processing_template_decl)
11746 /* FIXME: Handle error_mark_node more gracefully. */
11747 tree newdecl1 = push_template_decl (decl1);
11748 if (newdecl1 != error_mark_node)
11752 /* We are now in the scope of the function being defined. */
11753 current_function_decl = decl1;
11755 /* Save the parm names or decls from this function's declarator
11756 where store_parm_decls will find them. */
11757 current_function_parms = DECL_ARGUMENTS (decl1);
11759 /* Make sure the parameter and return types are reasonable. When
11760 you declare a function, these types can be incomplete, but they
11761 must be complete when you define the function. */
11762 check_function_type (decl1, current_function_parms);
11764 /* Build the return declaration for the function. */
11765 restype = TREE_TYPE (fntype);
11766 if (DECL_RESULT (decl1) == NULL_TREE)
11770 resdecl = build_decl (input_location, RESULT_DECL, 0, restype);
11771 DECL_ARTIFICIAL (resdecl) = 1;
11772 DECL_IGNORED_P (resdecl) = 1;
11773 DECL_RESULT (decl1) = resdecl;
11775 cp_apply_type_quals_to_decl (cp_type_quals (restype), resdecl);
11778 /* Let the user know we're compiling this function. */
11779 announce_function (decl1);
11781 /* Record the decl so that the function name is defined.
11782 If we already have a decl for this name, and it is a FUNCTION_DECL,
11783 use the old decl. */
11784 if (!processing_template_decl && !(flags & SF_PRE_PARSED))
11786 /* A specialization is not used to guide overload resolution. */
11787 if (!DECL_FUNCTION_MEMBER_P (decl1)
11788 && !(DECL_USE_TEMPLATE (decl1) &&
11789 PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl1))))
11791 tree olddecl = pushdecl (decl1);
11793 if (olddecl == error_mark_node)
11794 /* If something went wrong when registering the declaration,
11795 use DECL1; we have to have a FUNCTION_DECL to use when
11796 parsing the body of the function. */
11800 /* Otherwise, OLDDECL is either a previous declaration
11801 of the same function or DECL1 itself. */
11803 if (warn_missing_declarations
11804 && olddecl == decl1
11805 && !DECL_MAIN_P (decl1)
11806 && TREE_PUBLIC (decl1)
11807 && !DECL_DECLARED_INLINE_P (decl1))
11811 /* Check whether DECL1 is in an anonymous
11813 for (context = DECL_CONTEXT (decl1);
11815 context = DECL_CONTEXT (context))
11817 if (TREE_CODE (context) == NAMESPACE_DECL
11818 && DECL_NAME (context) == NULL_TREE)
11822 if (context == NULL)
11823 warning (OPT_Wmissing_declarations,
11824 "no previous declaration for %q+D", decl1);
11832 /* We need to set the DECL_CONTEXT. */
11833 if (!DECL_CONTEXT (decl1) && DECL_TEMPLATE_INFO (decl1))
11834 DECL_CONTEXT (decl1) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1));
11836 fntype = TREE_TYPE (decl1);
11838 /* If #pragma weak applies, mark the decl appropriately now.
11839 The pragma only applies to global functions. Because
11840 determining whether or not the #pragma applies involves
11841 computing the mangled name for the declaration, we cannot
11842 apply the pragma until after we have merged this declaration
11843 with any previous declarations; if the original declaration
11844 has a linkage specification, that specification applies to
11845 the definition as well, and may affect the mangled name. */
11846 if (!DECL_CONTEXT (decl1))
11847 maybe_apply_pragma_weak (decl1);
11850 /* Reset this in case the call to pushdecl changed it. */
11851 current_function_decl = decl1;
11853 gcc_assert (DECL_INITIAL (decl1));
11855 /* This function may already have been parsed, in which case just
11856 return; our caller will skip over the body without parsing. */
11857 if (DECL_INITIAL (decl1) != error_mark_node)
11860 /* Initialize RTL machinery. We cannot do this until
11861 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
11862 even when processing a template; this is how we get
11863 CFUN set up, and our per-function variables initialized.
11864 FIXME factor out the non-RTL stuff. */
11865 bl = current_binding_level;
11866 allocate_struct_function (decl1, processing_template_decl);
11868 /* Initialize the language data structures. Whenever we start
11869 a new function, we destroy temporaries in the usual way. */
11870 cfun->language = GGC_CNEW (struct language_function);
11871 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
11872 current_binding_level = bl;
11874 /* Even though we're inside a function body, we still don't want to
11875 call expand_expr to calculate the size of a variable-sized array.
11876 We haven't necessarily assigned RTL to all variables yet, so it's
11877 not safe to try to expand expressions involving them. */
11878 cfun->dont_save_pending_sizes_p = 1;
11880 /* Start the statement-tree, start the tree now. */
11881 DECL_SAVED_TREE (decl1) = push_stmt_list ();
11883 /* If we are (erroneously) defining a function that we have already
11884 defined before, wipe out what we knew before. */
11885 if (!DECL_PENDING_INLINE_P (decl1))
11886 DECL_SAVED_FUNCTION_DATA (decl1) = NULL;
11888 if (ctype && !doing_friend && !DECL_STATIC_FUNCTION_P (decl1))
11890 /* We know that this was set up by `grokclassfn'. We do not
11891 wait until `store_parm_decls', since evil parse errors may
11892 never get us to that point. Here we keep the consistency
11893 between `current_class_type' and `current_class_ptr'. */
11894 tree t = DECL_ARGUMENTS (decl1);
11896 gcc_assert (t != NULL_TREE && TREE_CODE (t) == PARM_DECL);
11897 gcc_assert (TREE_CODE (TREE_TYPE (t)) == POINTER_TYPE);
11899 cp_function_chain->x_current_class_ref
11900 = cp_build_indirect_ref (t, NULL, tf_warning_or_error);
11901 cp_function_chain->x_current_class_ptr = t;
11903 /* Constructors and destructors need to know whether they're "in
11904 charge" of initializing virtual base classes. */
11905 t = TREE_CHAIN (t);
11906 if (DECL_HAS_IN_CHARGE_PARM_P (decl1))
11908 current_in_charge_parm = t;
11909 t = TREE_CHAIN (t);
11911 if (DECL_HAS_VTT_PARM_P (decl1))
11913 gcc_assert (DECL_NAME (t) == vtt_parm_identifier);
11914 current_vtt_parm = t;
11918 honor_interface = (!DECL_TEMPLATE_INSTANTIATION (decl1)
11919 /* Implicitly-defined methods (like the
11920 destructor for a class in which no destructor
11921 is explicitly declared) must not be defined
11922 until their definition is needed. So, we
11923 ignore interface specifications for
11924 compiler-generated functions. */
11925 && !DECL_ARTIFICIAL (decl1));
11927 if (DECL_INTERFACE_KNOWN (decl1))
11929 tree ctx = decl_function_context (decl1);
11931 if (DECL_NOT_REALLY_EXTERN (decl1))
11932 DECL_EXTERNAL (decl1) = 0;
11934 if (ctx != NULL_TREE && DECL_DECLARED_INLINE_P (ctx)
11935 && TREE_PUBLIC (ctx))
11936 /* This is a function in a local class in an extern inline
11938 comdat_linkage (decl1);
11940 /* If this function belongs to an interface, it is public.
11941 If it belongs to someone else's interface, it is also external.
11942 This only affects inlines and template instantiations. */
11943 else if (!finfo->interface_unknown && honor_interface)
11945 if (DECL_DECLARED_INLINE_P (decl1)
11946 || DECL_TEMPLATE_INSTANTIATION (decl1)
11947 || processing_template_decl)
11949 DECL_EXTERNAL (decl1)
11950 = (finfo->interface_only
11951 || (DECL_DECLARED_INLINE_P (decl1)
11952 && ! flag_implement_inlines
11953 && !DECL_VINDEX (decl1)));
11955 /* For WIN32 we also want to put these in linkonce sections. */
11956 maybe_make_one_only (decl1);
11959 DECL_EXTERNAL (decl1) = 0;
11960 DECL_INTERFACE_KNOWN (decl1) = 1;
11961 /* If this function is in an interface implemented in this file,
11962 make sure that the back end knows to emit this function
11964 if (!DECL_EXTERNAL (decl1))
11965 mark_needed (decl1);
11967 else if (finfo->interface_unknown && finfo->interface_only
11968 && honor_interface)
11970 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
11971 interface, we will have both finfo->interface_unknown and
11972 finfo->interface_only set. In that case, we don't want to
11973 use the normal heuristics because someone will supply a
11974 #pragma implementation elsewhere, and deducing it here would
11975 produce a conflict. */
11976 comdat_linkage (decl1);
11977 DECL_EXTERNAL (decl1) = 0;
11978 DECL_INTERFACE_KNOWN (decl1) = 1;
11979 DECL_DEFER_OUTPUT (decl1) = 1;
11983 /* This is a definition, not a reference.
11984 So clear DECL_EXTERNAL, unless this is a GNU extern inline. */
11985 if (!GNU_INLINE_P (decl1))
11986 DECL_EXTERNAL (decl1) = 0;
11988 if ((DECL_DECLARED_INLINE_P (decl1)
11989 || DECL_TEMPLATE_INSTANTIATION (decl1))
11990 && ! DECL_INTERFACE_KNOWN (decl1)
11991 /* Don't try to defer nested functions for now. */
11992 && ! decl_function_context (decl1))
11993 DECL_DEFER_OUTPUT (decl1) = 1;
11995 DECL_INTERFACE_KNOWN (decl1) = 1;
11998 /* Determine the ELF visibility attribute for the function. We must not
11999 do this before calling "pushdecl", as we must allow "duplicate_decls"
12000 to merge any attributes appropriately. We also need to wait until
12002 if (!DECL_CLONED_FUNCTION_P (decl1))
12003 determine_visibility (decl1);
12005 begin_scope (sk_function_parms, decl1);
12009 if (DECL_DESTRUCTOR_P (decl1)
12010 || (DECL_CONSTRUCTOR_P (decl1)
12011 && targetm.cxx.cdtor_returns_this ()))
12013 cdtor_label = build_decl (input_location,
12014 LABEL_DECL, NULL_TREE, NULL_TREE);
12015 DECL_CONTEXT (cdtor_label) = current_function_decl;
12018 start_fname_decls ();
12020 store_parm_decls (current_function_parms);
12024 /* Like start_preparsed_function, except that instead of a
12025 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
12027 Returns 1 on success. If the DECLARATOR is not suitable for a function
12028 (it defines a datum instead), we return 0, which tells
12029 yyparse to report a parse error. */
12032 start_function (cp_decl_specifier_seq *declspecs,
12033 const cp_declarator *declarator,
12038 decl1 = grokdeclarator (declarator, declspecs, FUNCDEF, 1, &attrs);
12039 if (decl1 == error_mark_node)
12041 /* If the declarator is not suitable for a function definition,
12042 cause a syntax error. */
12043 if (decl1 == NULL_TREE || TREE_CODE (decl1) != FUNCTION_DECL)
12045 error ("invalid function declaration");
12049 if (DECL_MAIN_P (decl1))
12050 /* main must return int. grokfndecl should have corrected it
12051 (and issued a diagnostic) if the user got it wrong. */
12052 gcc_assert (same_type_p (TREE_TYPE (TREE_TYPE (decl1)),
12053 integer_type_node));
12055 start_preparsed_function (decl1, attrs, /*flags=*/SF_DEFAULT);
12060 /* Returns true iff an EH_SPEC_BLOCK should be created in the body of
12064 use_eh_spec_block (tree fn)
12066 return (flag_exceptions && flag_enforce_eh_specs
12067 && !processing_template_decl
12068 && TYPE_RAISES_EXCEPTIONS (TREE_TYPE (fn))
12069 /* We insert the EH_SPEC_BLOCK only in the original
12070 function; then, it is copied automatically to the
12072 && !DECL_CLONED_FUNCTION_P (fn)
12073 /* Implicitly-generated constructors and destructors have
12074 exception specifications. However, those specifications
12075 are the union of the possible exceptions specified by the
12076 constructors/destructors for bases and members, so no
12077 unallowed exception will ever reach this function. By
12078 not creating the EH_SPEC_BLOCK we save a little memory,
12079 and we avoid spurious warnings about unreachable
12081 && !DECL_ARTIFICIAL (fn));
12084 /* Store the parameter declarations into the current function declaration.
12085 This is called after parsing the parameter declarations, before
12086 digesting the body of the function.
12088 Also install to binding contour return value identifier, if any. */
12091 store_parm_decls (tree current_function_parms)
12093 tree fndecl = current_function_decl;
12096 /* This is a chain of any other decls that came in among the parm
12097 declarations. If a parm is declared with enum {foo, bar} x;
12098 then CONST_DECLs for foo and bar are put here. */
12099 tree nonparms = NULL_TREE;
12101 if (current_function_parms)
12103 /* This case is when the function was defined with an ANSI prototype.
12104 The parms already have decls, so we need not do anything here
12105 except record them as in effect
12106 and complain if any redundant old-style parm decls were written. */
12108 tree specparms = current_function_parms;
12111 /* Must clear this because it might contain TYPE_DECLs declared
12113 current_binding_level->names = NULL;
12115 /* If we're doing semantic analysis, then we'll call pushdecl
12116 for each of these. We must do them in reverse order so that
12117 they end in the correct forward order. */
12118 specparms = nreverse (specparms);
12120 for (parm = specparms; parm; parm = next)
12122 next = TREE_CHAIN (parm);
12123 if (TREE_CODE (parm) == PARM_DECL)
12125 if (DECL_NAME (parm) == NULL_TREE
12126 || TREE_CODE (parm) != VOID_TYPE)
12129 error ("parameter %qD declared void", parm);
12133 /* If we find an enum constant or a type tag,
12134 put it aside for the moment. */
12135 TREE_CHAIN (parm) = NULL_TREE;
12136 nonparms = chainon (nonparms, parm);
12140 /* Get the decls in their original chain order and record in the
12141 function. This is all and only the PARM_DECLs that were
12142 pushed into scope by the loop above. */
12143 DECL_ARGUMENTS (fndecl) = getdecls ();
12146 DECL_ARGUMENTS (fndecl) = NULL_TREE;
12148 /* Now store the final chain of decls for the arguments
12149 as the decl-chain of the current lexical scope.
12150 Put the enumerators in as well, at the front so that
12151 DECL_ARGUMENTS is not modified. */
12152 current_binding_level->names = chainon (nonparms, DECL_ARGUMENTS (fndecl));
12154 if (use_eh_spec_block (current_function_decl))
12155 current_eh_spec_block = begin_eh_spec_block ();
12159 /* We have finished doing semantic analysis on DECL, but have not yet
12160 generated RTL for its body. Save away our current state, so that
12161 when we want to generate RTL later we know what to do. */
12164 save_function_data (tree decl)
12166 struct language_function *f;
12168 /* Save the language-specific per-function data so that we can
12169 get it back when we really expand this function. */
12170 gcc_assert (!DECL_PENDING_INLINE_P (decl));
12173 f = GGC_NEW (struct language_function);
12174 memcpy (f, cp_function_chain, sizeof (struct language_function));
12175 DECL_SAVED_FUNCTION_DATA (decl) = f;
12177 /* Clear out the bits we don't need. */
12178 f->base.x_stmt_tree.x_cur_stmt_list = NULL_TREE;
12179 f->bindings = NULL;
12180 f->x_local_names = NULL;
12184 /* Set the return value of the constructor (if present). */
12187 finish_constructor_body (void)
12192 if (targetm.cxx.cdtor_returns_this ()
12193 && (! TYPE_FOR_JAVA (current_class_type)))
12195 /* Any return from a constructor will end up here. */
12196 add_stmt (build_stmt (input_location, LABEL_EXPR, cdtor_label));
12198 val = DECL_ARGUMENTS (current_function_decl);
12199 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
12200 DECL_RESULT (current_function_decl), val);
12201 /* Return the address of the object. */
12202 exprstmt = build_stmt (input_location, RETURN_EXPR, val);
12203 add_stmt (exprstmt);
12207 /* Do all the processing for the beginning of a destructor; set up the
12208 vtable pointers and cleanups for bases and members. */
12211 begin_destructor_body (void)
12213 tree compound_stmt;
12215 /* If the CURRENT_CLASS_TYPE is incomplete, we will have already
12216 issued an error message. We still want to try to process the
12217 body of the function, but initialize_vtbl_ptrs will crash if
12218 TYPE_BINFO is NULL. */
12219 if (COMPLETE_TYPE_P (current_class_type))
12221 compound_stmt = begin_compound_stmt (0);
12222 /* Make all virtual function table pointers in non-virtual base
12223 classes point to CURRENT_CLASS_TYPE's virtual function
12225 initialize_vtbl_ptrs (current_class_ptr);
12226 finish_compound_stmt (compound_stmt);
12228 /* And insert cleanups for our bases and members so that they
12229 will be properly destroyed if we throw. */
12230 push_base_cleanups ();
12234 /* At the end of every destructor we generate code to delete the object if
12235 necessary. Do that now. */
12238 finish_destructor_body (void)
12242 /* Any return from a destructor will end up here; that way all base
12243 and member cleanups will be run when the function returns. */
12244 add_stmt (build_stmt (input_location, LABEL_EXPR, cdtor_label));
12246 /* In a virtual destructor, we must call delete. */
12247 if (DECL_VIRTUAL_P (current_function_decl))
12250 tree virtual_size = cxx_sizeof (current_class_type);
12254 At the point of definition of a virtual destructor (including
12255 an implicit definition), non-placement operator delete shall
12256 be looked up in the scope of the destructor's class and if
12257 found shall be accessible and unambiguous. */
12258 exprstmt = build_op_delete_call(DELETE_EXPR, current_class_ptr,
12260 /*global_p=*/false,
12261 /*placement=*/NULL_TREE,
12262 /*alloc_fn=*/NULL_TREE);
12264 if_stmt = begin_if_stmt ();
12265 finish_if_stmt_cond (build2 (BIT_AND_EXPR, integer_type_node,
12266 current_in_charge_parm,
12269 finish_expr_stmt (exprstmt);
12270 finish_then_clause (if_stmt);
12271 finish_if_stmt (if_stmt);
12274 if (targetm.cxx.cdtor_returns_this ())
12278 val = DECL_ARGUMENTS (current_function_decl);
12279 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
12280 DECL_RESULT (current_function_decl), val);
12281 /* Return the address of the object. */
12282 exprstmt = build_stmt (input_location, RETURN_EXPR, val);
12283 add_stmt (exprstmt);
12287 /* Do the necessary processing for the beginning of a function body, which
12288 in this case includes member-initializers, but not the catch clauses of
12289 a function-try-block. Currently, this means opening a binding level
12290 for the member-initializers (in a ctor) and member cleanups (in a dtor). */
12293 begin_function_body (void)
12297 if (! FUNCTION_NEEDS_BODY_BLOCK (current_function_decl))
12300 if (processing_template_decl)
12301 /* Do nothing now. */;
12303 /* Always keep the BLOCK node associated with the outermost pair of
12304 curly braces of a function. These are needed for correct
12305 operation of dwarfout.c. */
12306 keep_next_level (true);
12308 stmt = begin_compound_stmt (BCS_FN_BODY);
12310 if (processing_template_decl)
12311 /* Do nothing now. */;
12312 else if (DECL_DESTRUCTOR_P (current_function_decl))
12313 begin_destructor_body ();
12318 /* Do the processing for the end of a function body. Currently, this means
12319 closing out the cleanups for fully-constructed bases and members, and in
12320 the case of the destructor, deleting the object if desired. Again, this
12321 is only meaningful for [cd]tors, since they are the only functions where
12322 there is a significant distinction between the main body and any
12323 function catch clauses. Handling, say, main() return semantics here
12324 would be wrong, as flowing off the end of a function catch clause for
12325 main() would also need to return 0. */
12328 finish_function_body (tree compstmt)
12330 if (compstmt == NULL_TREE)
12333 /* Close the block. */
12334 finish_compound_stmt (compstmt);
12336 if (processing_template_decl)
12337 /* Do nothing now. */;
12338 else if (DECL_CONSTRUCTOR_P (current_function_decl))
12339 finish_constructor_body ();
12340 else if (DECL_DESTRUCTOR_P (current_function_decl))
12341 finish_destructor_body ();
12344 /* Given a function, returns the BLOCK corresponding to the outermost level
12345 of curly braces, skipping the artificial block created for constructor
12349 outer_curly_brace_block (tree fndecl)
12351 tree block = BLOCK_SUBBLOCKS (DECL_INITIAL (fndecl));
12352 if (FUNCTION_NEEDS_BODY_BLOCK (current_function_decl))
12353 /* Skip the artificial function body block. */
12354 block = BLOCK_SUBBLOCKS (block);
12358 /* Finish up a function declaration and compile that function
12359 all the way to assembler language output. The free the storage
12360 for the function definition.
12362 FLAGS is a bitwise or of the following values:
12364 We just finished processing the body of an in-class inline
12365 function definition. (This processing will have taken place
12366 after the class definition is complete.) */
12369 finish_function (int flags)
12371 tree fndecl = current_function_decl;
12372 tree fntype, ctype = NULL_TREE;
12373 int inclass_inline = (flags & 2) != 0;
12376 /* When we get some parse errors, we can end up without a
12377 current_function_decl, so cope. */
12378 if (fndecl == NULL_TREE)
12379 return error_mark_node;
12381 gcc_assert (!defer_mark_used_calls);
12382 defer_mark_used_calls = true;
12384 if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fndecl)
12385 && DECL_VIRTUAL_P (fndecl)
12386 && !processing_template_decl)
12388 tree fnclass = DECL_CONTEXT (fndecl);
12389 if (fndecl == CLASSTYPE_KEY_METHOD (fnclass))
12390 keyed_classes = tree_cons (NULL_TREE, fnclass, keyed_classes);
12393 nested = function_depth > 1;
12394 fntype = TREE_TYPE (fndecl);
12396 /* TREE_READONLY (fndecl) = 1;
12397 This caused &foo to be of type ptr-to-const-function
12398 which then got a warning when stored in a ptr-to-function variable. */
12400 gcc_assert (building_stmt_tree ());
12401 /* The current function is being defined, so its DECL_INITIAL should
12402 be set, and unless there's a multiple definition, it should be
12403 error_mark_node. */
12404 gcc_assert (DECL_INITIAL (fndecl) == error_mark_node);
12406 /* For a cloned function, we've already got all the code we need;
12407 there's no need to add any extra bits. */
12408 if (!DECL_CLONED_FUNCTION_P (fndecl))
12410 if (DECL_MAIN_P (current_function_decl))
12414 /* Make it so that `main' always returns 0 by default (or
12417 stmt = finish_return_stmt (integer_one_node);
12419 stmt = finish_return_stmt (integer_zero_node);
12421 /* Hack. We don't want the middle-end to warn that this
12422 return is unreachable, so put the statement on the
12425 location_t linezero = linemap_line_start (line_table, 0, 1);
12426 SET_EXPR_LOCATION (stmt, linezero);
12430 if (use_eh_spec_block (current_function_decl))
12431 finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
12432 (TREE_TYPE (current_function_decl)),
12433 current_eh_spec_block);
12436 /* If we're saving up tree structure, tie off the function now. */
12437 DECL_SAVED_TREE (fndecl) = pop_stmt_list (DECL_SAVED_TREE (fndecl));
12439 finish_fname_decls ();
12441 /* If this function can't throw any exceptions, remember that. */
12442 if (!processing_template_decl
12443 && !cp_function_chain->can_throw
12444 && !flag_non_call_exceptions
12445 && !DECL_REPLACEABLE_P (fndecl))
12446 TREE_NOTHROW (fndecl) = 1;
12448 /* This must come after expand_function_end because cleanups might
12449 have declarations (from inline functions) that need to go into
12450 this function's blocks. */
12452 /* If the current binding level isn't the outermost binding level
12453 for this function, either there is a bug, or we have experienced
12454 syntax errors and the statement tree is malformed. */
12455 if (current_binding_level->kind != sk_function_parms)
12457 /* Make sure we have already experienced errors. */
12458 gcc_assert (errorcount);
12460 /* Throw away the broken statement tree and extra binding
12462 DECL_SAVED_TREE (fndecl) = alloc_stmt_list ();
12464 while (current_binding_level->kind != sk_function_parms)
12466 if (current_binding_level->kind == sk_class)
12467 pop_nested_class ();
12469 poplevel (0, 0, 0);
12472 poplevel (1, 0, 1);
12474 /* Statements should always be full-expressions at the outermost set
12475 of curly braces for a function. */
12476 gcc_assert (stmts_are_full_exprs_p ());
12478 /* Set up the named return value optimization, if we can. Candidate
12479 variables are selected in check_return_expr. */
12480 if (current_function_return_value)
12482 tree r = current_function_return_value;
12485 if (r != error_mark_node
12486 /* This is only worth doing for fns that return in memory--and
12487 simpler, since we don't have to worry about promoted modes. */
12488 && aggregate_value_p (TREE_TYPE (TREE_TYPE (fndecl)), fndecl)
12489 /* Only allow this for variables declared in the outer scope of
12490 the function so we know that their lifetime always ends with a
12491 return; see g++.dg/opt/nrv6.C. We could be more flexible if
12492 we were to do this optimization in tree-ssa. */
12493 && (outer = outer_curly_brace_block (fndecl))
12494 && chain_member (r, BLOCK_VARS (outer)))
12495 finalize_nrv (&DECL_SAVED_TREE (fndecl), r, DECL_RESULT (fndecl));
12497 current_function_return_value = NULL_TREE;
12500 /* Remember that we were in class scope. */
12501 if (current_class_name)
12502 ctype = current_class_type;
12504 /* Must mark the RESULT_DECL as being in this function. */
12505 DECL_CONTEXT (DECL_RESULT (fndecl)) = fndecl;
12507 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
12508 to the FUNCTION_DECL node itself. */
12509 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl)) = fndecl;
12511 /* Save away current state, if appropriate. */
12512 if (!processing_template_decl)
12513 save_function_data (fndecl);
12515 /* Complain if there's just no return statement. */
12516 if (warn_return_type
12517 && TREE_CODE (TREE_TYPE (fntype)) != VOID_TYPE
12518 && !dependent_type_p (TREE_TYPE (fntype))
12519 && !current_function_returns_value && !current_function_returns_null
12520 /* Don't complain if we abort or throw. */
12521 && !current_function_returns_abnormally
12522 && !DECL_NAME (DECL_RESULT (fndecl))
12523 && !TREE_NO_WARNING (fndecl)
12524 /* Structor return values (if any) are set by the compiler. */
12525 && !DECL_CONSTRUCTOR_P (fndecl)
12526 && !DECL_DESTRUCTOR_P (fndecl))
12528 warning (OPT_Wreturn_type,
12529 "no return statement in function returning non-void");
12530 TREE_NO_WARNING (fndecl) = 1;
12533 /* Store the end of the function, so that we get good line number
12534 info for the epilogue. */
12535 cfun->function_end_locus = input_location;
12537 /* Genericize before inlining. */
12538 if (!processing_template_decl)
12540 struct language_function *f = DECL_SAVED_FUNCTION_DATA (fndecl);
12541 invoke_plugin_callbacks (PLUGIN_CXX_CP_PRE_GENERICIZE, fndecl);
12542 cp_genericize (fndecl);
12543 /* Clear out the bits we don't need. */
12544 f->x_current_class_ptr = NULL;
12545 f->x_current_class_ref = NULL;
12546 f->x_eh_spec_block = NULL;
12547 f->x_in_charge_parm = NULL;
12548 f->x_vtt_parm = NULL;
12549 f->x_return_value = NULL;
12550 f->bindings = NULL;
12551 f->extern_decl_map = NULL;
12553 /* Clear out the bits we don't need. */
12554 local_names = NULL;
12556 /* We're leaving the context of this function, so zap cfun. It's still in
12557 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
12559 current_function_decl = NULL;
12561 /* If this is an in-class inline definition, we may have to pop the
12562 bindings for the template parameters that we added in
12563 maybe_begin_member_template_processing when start_function was
12565 if (inclass_inline)
12566 maybe_end_member_template_processing ();
12568 /* Leave the scope of the class. */
12570 pop_nested_class ();
12576 /* Let the error reporting routines know that we're outside a
12577 function. For a nested function, this value is used in
12578 cxx_pop_function_context and then reset via pop_function_context. */
12579 current_function_decl = NULL_TREE;
12581 defer_mark_used_calls = false;
12582 if (deferred_mark_used_calls)
12587 for (i = 0; VEC_iterate (tree, deferred_mark_used_calls, i, decl); i++)
12589 VEC_free (tree, gc, deferred_mark_used_calls);
12595 /* Create the FUNCTION_DECL for a function definition.
12596 DECLSPECS and DECLARATOR are the parts of the declaration;
12597 they describe the return type and the name of the function,
12598 but twisted together in a fashion that parallels the syntax of C.
12600 This function creates a binding context for the function body
12601 as well as setting up the FUNCTION_DECL in current_function_decl.
12603 Returns a FUNCTION_DECL on success.
12605 If the DECLARATOR is not suitable for a function (it defines a datum
12606 instead), we return 0, which tells yyparse to report a parse error.
12608 May return void_type_node indicating that this method is actually
12609 a friend. See grokfield for more details.
12611 Came here with a `.pushlevel' .
12613 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
12614 CHANGES TO CODE IN `grokfield'. */
12617 grokmethod (cp_decl_specifier_seq *declspecs,
12618 const cp_declarator *declarator, tree attrlist)
12620 tree fndecl = grokdeclarator (declarator, declspecs, MEMFUNCDEF, 0,
12623 if (fndecl == error_mark_node)
12624 return error_mark_node;
12626 if (fndecl == NULL || TREE_CODE (fndecl) != FUNCTION_DECL)
12628 error ("invalid member function declaration");
12629 return error_mark_node;
12633 cplus_decl_attributes (&fndecl, attrlist, 0);
12635 /* Pass friends other than inline friend functions back. */
12636 if (fndecl == void_type_node)
12639 if (DECL_IN_AGGR_P (fndecl))
12641 if (DECL_CONTEXT (fndecl)
12642 && TREE_CODE (DECL_CONTEXT (fndecl)) != NAMESPACE_DECL)
12643 error ("%qD is already defined in class %qT", fndecl,
12644 DECL_CONTEXT (fndecl));
12645 return error_mark_node;
12648 check_template_shadow (fndecl);
12650 DECL_DECLARED_INLINE_P (fndecl) = 1;
12651 DECL_NO_INLINE_WARNING_P (fndecl) = 1;
12653 /* We process method specializations in finish_struct_1. */
12654 if (processing_template_decl && !DECL_TEMPLATE_SPECIALIZATION (fndecl))
12656 fndecl = push_template_decl (fndecl);
12657 if (fndecl == error_mark_node)
12661 if (! DECL_FRIEND_P (fndecl))
12663 if (TREE_CHAIN (fndecl))
12665 fndecl = copy_node (fndecl);
12666 TREE_CHAIN (fndecl) = NULL_TREE;
12670 cp_finish_decl (fndecl, NULL_TREE, false, NULL_TREE, 0);
12672 DECL_IN_AGGR_P (fndecl) = 1;
12677 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
12678 we can lay it out later, when and if its type becomes complete. */
12681 maybe_register_incomplete_var (tree var)
12683 gcc_assert (TREE_CODE (var) == VAR_DECL);
12685 /* Keep track of variables with incomplete types. */
12686 if (!processing_template_decl && TREE_TYPE (var) != error_mark_node
12687 && DECL_EXTERNAL (var))
12689 tree inner_type = TREE_TYPE (var);
12691 while (TREE_CODE (inner_type) == ARRAY_TYPE)
12692 inner_type = TREE_TYPE (inner_type);
12693 inner_type = TYPE_MAIN_VARIANT (inner_type);
12695 if ((!COMPLETE_TYPE_P (inner_type) && CLASS_TYPE_P (inner_type))
12696 /* RTTI TD entries are created while defining the type_info. */
12697 || (TYPE_LANG_SPECIFIC (inner_type)
12698 && TYPE_BEING_DEFINED (inner_type)))
12699 incomplete_vars = tree_cons (inner_type, var, incomplete_vars);
12703 /* Called when a class type (given by TYPE) is defined. If there are
12704 any existing VAR_DECLs whose type has been completed by this
12705 declaration, update them now. */
12708 complete_vars (tree type)
12710 tree *list = &incomplete_vars;
12712 gcc_assert (CLASS_TYPE_P (type));
12715 if (same_type_p (type, TREE_PURPOSE (*list)))
12717 tree var = TREE_VALUE (*list);
12718 tree type = TREE_TYPE (var);
12719 /* Complete the type of the variable. The VAR_DECL itself
12720 will be laid out in expand_expr. */
12721 complete_type (type);
12722 cp_apply_type_quals_to_decl (cp_type_quals (type), var);
12723 /* Remove this entry from the list. */
12724 *list = TREE_CHAIN (*list);
12727 list = &TREE_CHAIN (*list);
12730 /* Check for pending declarations which may have abstract type. */
12731 complete_type_check_abstract (type);
12734 /* If DECL is of a type which needs a cleanup, build and return an
12735 expression to perform that cleanup here. Return NULL_TREE if no
12736 cleanup need be done. */
12739 cxx_maybe_build_cleanup (tree decl)
12745 /* Assume no cleanup is required. */
12746 cleanup = NULL_TREE;
12748 if (error_operand_p (decl))
12751 /* Handle "__attribute__((cleanup))". We run the cleanup function
12752 before the destructor since the destructor is what actually
12753 terminates the lifetime of the object. */
12754 attr = lookup_attribute ("cleanup", DECL_ATTRIBUTES (decl));
12761 /* Get the name specified by the user for the cleanup function. */
12762 id = TREE_VALUE (TREE_VALUE (attr));
12763 /* Look up the name to find the cleanup function to call. It is
12764 important to use lookup_name here because that is what is
12765 used in c-common.c:handle_cleanup_attribute when performing
12766 initial checks on the attribute. Note that those checks
12767 include ensuring that the function found is not an overloaded
12768 function, or an object with an overloaded call operator,
12769 etc.; we can rely on the fact that the function found is an
12770 ordinary FUNCTION_DECL. */
12771 fn = lookup_name (id);
12772 arg = build_address (decl);
12774 cleanup = cp_build_function_call (fn, build_tree_list (NULL_TREE,
12776 tf_warning_or_error);
12778 /* Handle ordinary C++ destructors. */
12779 type = TREE_TYPE (decl);
12780 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
12782 int flags = LOOKUP_NORMAL|LOOKUP_DESTRUCTOR;
12783 bool has_vbases = (TREE_CODE (type) == RECORD_TYPE
12784 && CLASSTYPE_VBASECLASSES (type));
12788 if (TREE_CODE (type) == ARRAY_TYPE)
12791 addr = build_address (decl);
12793 /* Optimize for space over speed here. */
12794 if (!has_vbases || flag_expensive_optimizations)
12795 flags |= LOOKUP_NONVIRTUAL;
12797 call = build_delete (TREE_TYPE (addr), addr,
12798 sfk_complete_destructor, flags, 0);
12800 cleanup = build_compound_expr (input_location, cleanup, call);
12808 /* When a stmt has been parsed, this function is called. */
12815 /* Return the FUNCTION_TYPE that corresponds to MEMFNTYPE, which can be a
12816 FUNCTION_DECL, METHOD_TYPE, FUNCTION_TYPE, pointer or reference to
12817 METHOD_TYPE or FUNCTION_TYPE, or pointer to member function. */
12820 static_fn_type (tree memfntype)
12826 if (TYPE_PTRMEMFUNC_P (memfntype))
12827 memfntype = TYPE_PTRMEMFUNC_FN_TYPE (memfntype);
12828 if (POINTER_TYPE_P (memfntype)
12829 || TREE_CODE (memfntype) == FUNCTION_DECL)
12830 memfntype = TREE_TYPE (memfntype);
12831 if (TREE_CODE (memfntype) == FUNCTION_TYPE)
12833 gcc_assert (TREE_CODE (memfntype) == METHOD_TYPE);
12834 args = TYPE_ARG_TYPES (memfntype);
12835 fntype = build_function_type (TREE_TYPE (memfntype), TREE_CHAIN (args));
12836 quals = cp_type_quals (TREE_TYPE (TREE_VALUE (args)));
12837 fntype = build_qualified_type (fntype, quals);
12838 fntype = (cp_build_type_attribute_variant
12839 (fntype, TYPE_ATTRIBUTES (memfntype)));
12840 fntype = (build_exception_variant
12841 (fntype, TYPE_RAISES_EXCEPTIONS (memfntype)));
12845 /* DECL was originally constructed as a non-static member function,
12846 but turned out to be static. Update it accordingly. */
12849 revert_static_member_fn (tree decl)
12851 TREE_TYPE (decl) = static_fn_type (decl);
12853 if (cp_type_quals (TREE_TYPE (decl)) != TYPE_UNQUALIFIED)
12854 error ("static member function %q#D declared with type qualifiers", decl);
12856 if (DECL_ARGUMENTS (decl))
12857 DECL_ARGUMENTS (decl) = TREE_CHAIN (DECL_ARGUMENTS (decl));
12858 DECL_STATIC_FUNCTION_P (decl) = 1;
12861 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
12862 one of the language-independent trees. */
12864 enum cp_tree_node_structure_enum
12865 cp_tree_node_structure (union lang_tree_node * t)
12867 switch (TREE_CODE (&t->generic))
12869 case DEFAULT_ARG: return TS_CP_DEFAULT_ARG;
12870 case IDENTIFIER_NODE: return TS_CP_IDENTIFIER;
12871 case OVERLOAD: return TS_CP_OVERLOAD;
12872 case TEMPLATE_PARM_INDEX: return TS_CP_TPI;
12873 case PTRMEM_CST: return TS_CP_PTRMEM;
12874 case BASELINK: return TS_CP_BASELINK;
12875 case STATIC_ASSERT: return TS_CP_STATIC_ASSERT;
12876 case ARGUMENT_PACK_SELECT: return TS_CP_ARGUMENT_PACK_SELECT;
12877 case TRAIT_EXPR: return TS_CP_TRAIT_EXPR;
12878 case LAMBDA_EXPR: return TS_CP_LAMBDA_EXPR;
12879 default: return TS_CP_GENERIC;
12883 /* Build the void_list_node (void_type_node having been created). */
12885 build_void_list_node (void)
12887 tree t = build_tree_list (NULL_TREE, void_type_node);
12892 cp_missing_noreturn_ok_p (tree decl)
12894 /* A missing noreturn is ok for the `main' function. */
12895 return DECL_MAIN_P (decl);
12898 /* Return the COMDAT group into which DECL should be placed. */
12901 cxx_comdat_group (tree decl)
12905 /* Virtual tables, construction virtual tables, and virtual table
12906 tables all go in a single COMDAT group, named after the primary
12908 if (TREE_CODE (decl) == VAR_DECL && DECL_VTABLE_OR_VTT_P (decl))
12909 name = DECL_ASSEMBLER_NAME (CLASSTYPE_VTABLES (DECL_CONTEXT (decl)));
12910 /* For all other DECLs, the COMDAT group is the mangled name of the
12911 declaration itself. */
12914 while (DECL_THUNK_P (decl))
12916 /* If TARGET_USE_LOCAL_THUNK_ALIAS_P, use_thunk puts the thunk
12917 into the same section as the target function. In that case
12918 we must return target's name. */
12919 tree target = THUNK_TARGET (decl);
12920 if (TARGET_USE_LOCAL_THUNK_ALIAS_P (target)
12921 && DECL_SECTION_NAME (target) != NULL
12922 && DECL_ONE_ONLY (target))
12927 name = DECL_ASSEMBLER_NAME (decl);
12933 #include "gt-cp-decl.h"