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, 2010
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"
51 #include "diagnostic.h"
55 #include "tree-flow.h"
56 #include "pointer-set.h"
59 static tree grokparms (tree parmlist, tree *);
60 static const char *redeclaration_error_message (tree, tree);
62 static int decl_jump_unsafe (tree);
63 static void require_complete_types_for_parms (tree);
64 static int ambi_op_p (enum tree_code);
65 static int unary_op_p (enum tree_code);
66 static void push_local_name (tree);
67 static tree grok_reference_init (tree, tree, tree, tree *);
68 static tree grokvardecl (tree, tree, const cp_decl_specifier_seq *,
70 static void record_unknown_type (tree, const char *);
71 static tree builtin_function_1 (tree, tree, bool);
72 static tree build_library_fn_1 (tree, enum tree_code, tree);
73 static int member_function_or_else (tree, tree, enum overload_flags);
74 static void bad_specifiers (tree, const char *, int, int, int, int,
76 static void check_for_uninitialized_const_var (tree);
77 static hashval_t typename_hash (const void *);
78 static int typename_compare (const void *, const void *);
79 static tree local_variable_p_walkfn (tree *, int *, void *);
80 static tree record_builtin_java_type (const char *, int);
81 static const char *tag_name (enum tag_types);
82 static tree lookup_and_check_tag (enum tag_types, tree, tag_scope, bool);
83 static int walk_namespaces_r (tree, walk_namespaces_fn, void *);
84 static void maybe_deduce_size_from_array_init (tree, tree);
85 static void layout_var_decl (tree);
86 static tree check_initializer (tree, tree, int, tree *);
87 static void make_rtl_for_nonlocal_decl (tree, tree, const char *);
88 static void save_function_data (tree);
89 static void check_function_type (tree, tree);
90 static void finish_constructor_body (void);
91 static void begin_destructor_body (void);
92 static void finish_destructor_body (void);
93 static tree create_array_type_for_decl (tree, tree, tree);
94 static tree get_atexit_node (void);
95 static tree get_dso_handle_node (void);
96 static tree start_cleanup_fn (void);
97 static void end_cleanup_fn (void);
98 static tree cp_make_fname_decl (location_t, tree, int);
99 static void initialize_predefined_identifiers (void);
100 static tree check_special_function_return_type
101 (special_function_kind, tree, tree);
102 static tree push_cp_library_fn (enum tree_code, tree);
103 static tree build_cp_library_fn (tree, enum tree_code, tree);
104 static void store_parm_decls (tree);
105 static void initialize_local_var (tree, tree);
106 static void expand_static_init (tree, 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. */
526 int leaving_for_scope;
529 timevar_push (TV_NAME_LOOKUP);
534 gcc_assert (current_binding_level->kind != sk_class);
536 if (current_binding_level->kind == sk_cleanup)
538 subblocks = functionbody >= 0 ? current_binding_level->blocks : 0;
540 gcc_assert (!VEC_length(cp_class_binding,
541 current_binding_level->class_shadowed));
543 /* We used to use KEEP == 2 to indicate that the new block should go
544 at the beginning of the list of blocks at this binding level,
545 rather than the end. This hack is no longer used. */
546 gcc_assert (keep == 0 || keep == 1);
548 if (current_binding_level->keep)
551 /* Any uses of undefined labels, and any defined labels, now operate
552 under constraints of next binding contour. */
553 if (cfun && !functionbody && named_labels)
554 htab_traverse (named_labels, poplevel_named_label_1,
555 current_binding_level);
557 /* Get the decls in the order they were written.
558 Usually current_binding_level->names is in reverse order.
559 But parameter decls were previously put in forward order. */
562 current_binding_level->names
563 = decls = nreverse (current_binding_level->names);
565 decls = current_binding_level->names;
567 /* If there were any declarations or structure tags in that level,
568 or if this level is a function body,
569 create a BLOCK to record them for the life of this function. */
571 if (keep == 1 || functionbody)
572 block = make_node (BLOCK);
573 if (block != NULL_TREE)
575 BLOCK_VARS (block) = decls;
576 BLOCK_SUBBLOCKS (block) = subblocks;
579 /* In each subblock, record that this is its superior. */
581 for (link = subblocks; link; link = BLOCK_CHAIN (link))
582 BLOCK_SUPERCONTEXT (link) = block;
584 /* We still support the old for-scope rules, whereby the variables
585 in a for-init statement were in scope after the for-statement
586 ended. We only use the new rules if flag_new_for_scope is
589 = current_binding_level->kind == sk_for && flag_new_for_scope == 1;
591 /* Before we remove the declarations first check for unused variables. */
592 if (warn_unused_variable
593 && !processing_template_decl)
594 for (decl = getdecls (); decl; decl = TREE_CHAIN (decl))
595 if (TREE_CODE (decl) == VAR_DECL
596 && ! TREE_USED (decl)
597 && ! DECL_IN_SYSTEM_HEADER (decl)
598 && DECL_NAME (decl) && ! DECL_ARTIFICIAL (decl))
599 warning (OPT_Wunused_variable, "unused variable %q+D", decl);
601 /* Remove declarations for all the DECLs in this level. */
602 for (link = decls; link; link = TREE_CHAIN (link))
604 if (leaving_for_scope && TREE_CODE (link) == VAR_DECL
607 tree name = DECL_NAME (link);
611 ob = outer_binding (name,
612 IDENTIFIER_BINDING (name),
615 ns_binding = IDENTIFIER_NAMESPACE_VALUE (name);
617 ns_binding = NULL_TREE;
619 if (ob && ob->scope == current_binding_level->level_chain)
620 /* We have something like:
625 and we are leaving the `for' scope. There's no reason to
626 keep the binding of the inner `i' in this case. */
627 pop_binding (name, link);
628 else if ((ob && (TREE_CODE (ob->value) == TYPE_DECL))
629 || (ns_binding && TREE_CODE (ns_binding) == TYPE_DECL))
630 /* Here, we have something like:
638 We must pop the for-scope binding so we know what's a
639 type and what isn't. */
640 pop_binding (name, link);
643 /* Mark this VAR_DECL as dead so that we can tell we left it
644 there only for backward compatibility. */
645 DECL_DEAD_FOR_LOCAL (link) = 1;
647 /* Keep track of what should have happened when we
648 popped the binding. */
651 SET_DECL_SHADOWED_FOR_VAR (link, ob->value);
652 DECL_HAS_SHADOWED_FOR_VAR_P (link) = 1;
655 /* Add it to the list of dead variables in the next
656 outermost binding to that we can remove these when we
657 leave that binding. */
658 current_binding_level->level_chain->dead_vars_from_for
659 = tree_cons (NULL_TREE, link,
660 current_binding_level->level_chain->
663 /* Although we don't pop the cxx_binding, we do clear
664 its SCOPE since the scope is going away now. */
665 IDENTIFIER_BINDING (name)->scope
666 = current_binding_level->level_chain;
673 /* Remove the binding. */
676 if (TREE_CODE (decl) == TREE_LIST)
677 decl = TREE_VALUE (decl);
680 if (TREE_CODE (name) == OVERLOAD)
681 name = OVL_FUNCTION (name);
683 gcc_assert (DECL_P (name));
684 pop_binding (DECL_NAME (name), decl);
688 /* Remove declarations for any `for' variables from inner scopes
689 that we kept around. */
690 for (link = current_binding_level->dead_vars_from_for;
691 link; link = TREE_CHAIN (link))
692 pop_binding (DECL_NAME (TREE_VALUE (link)), TREE_VALUE (link));
694 /* Restore the IDENTIFIER_TYPE_VALUEs. */
695 for (link = current_binding_level->type_shadowed;
696 link; link = TREE_CHAIN (link))
697 SET_IDENTIFIER_TYPE_VALUE (TREE_PURPOSE (link), TREE_VALUE (link));
699 /* Restore the IDENTIFIER_LABEL_VALUEs for local labels. */
700 for (link = current_binding_level->shadowed_labels;
702 link = TREE_CHAIN (link))
703 pop_local_label (TREE_VALUE (link), TREE_PURPOSE (link));
705 /* There may be OVERLOADs (wrapped in TREE_LISTs) on the BLOCK_VARs
706 list if a `using' declaration put them there. The debugging
707 back ends won't understand OVERLOAD, so we remove them here.
708 Because the BLOCK_VARS are (temporarily) shared with
709 CURRENT_BINDING_LEVEL->NAMES we must do this fixup after we have
710 popped all the bindings. */
715 for (d = &BLOCK_VARS (block); *d; )
717 if (TREE_CODE (*d) == TREE_LIST)
718 *d = TREE_CHAIN (*d);
720 d = &TREE_CHAIN (*d);
724 /* If the level being exited is the top level of a function,
725 check over all the labels. */
728 /* Since this is the top level block of a function, the vars are
729 the function's parameters. Don't leave them in the BLOCK
730 because they are found in the FUNCTION_DECL instead. */
731 BLOCK_VARS (block) = 0;
735 kind = current_binding_level->kind;
736 if (kind == sk_cleanup)
740 /* If this is a temporary binding created for a cleanup, then we'll
741 have pushed a statement list level. Pop that, create a new
742 BIND_EXPR for the block, and insert it into the stream. */
743 stmt = pop_stmt_list (current_binding_level->statement_list);
744 stmt = c_build_bind_expr (input_location, block, stmt);
751 /* The current function is being defined, so its DECL_INITIAL
752 should be error_mark_node. */
753 gcc_assert (DECL_INITIAL (current_function_decl) == error_mark_node);
754 DECL_INITIAL (current_function_decl) = block;
757 current_binding_level->blocks
758 = chainon (current_binding_level->blocks, block);
760 /* If we did not make a block for the level just exited,
761 any blocks made for inner levels
762 (since they cannot be recorded as subblocks in that level)
763 must be carried forward so they will later become subblocks
764 of something else. */
766 current_binding_level->blocks
767 = chainon (current_binding_level->blocks, subblocks);
769 /* Each and every BLOCK node created here in `poplevel' is important
770 (e.g. for proper debugging information) so if we created one
771 earlier, mark it as "used". */
773 TREE_USED (block) = 1;
775 /* All temporary bindings created for cleanups are popped silently. */
776 if (kind == sk_cleanup)
779 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, block);
782 /* Walk all the namespaces contained NAMESPACE, including NAMESPACE
783 itself, calling F for each. The DATA is passed to F as well. */
786 walk_namespaces_r (tree name_space, walk_namespaces_fn f, void* data)
789 tree current = NAMESPACE_LEVEL (name_space)->namespaces;
791 result |= (*f) (name_space, data);
793 for (; current; current = TREE_CHAIN (current))
794 result |= walk_namespaces_r (current, f, data);
799 /* Walk all the namespaces, calling F for each. The DATA is passed to
803 walk_namespaces (walk_namespaces_fn f, void* data)
805 return walk_namespaces_r (global_namespace, f, data);
808 /* Call wrapup_globals_declarations for the globals in NAMESPACE. If
809 DATA is non-NULL, this is the last time we will call
810 wrapup_global_declarations for this NAMESPACE. */
813 wrapup_globals_for_namespace (tree name_space, void* data)
815 struct cp_binding_level *level = NAMESPACE_LEVEL (name_space);
816 VEC(tree,gc) *statics = level->static_decls;
817 tree *vec = VEC_address (tree, statics);
818 int len = VEC_length (tree, statics);
819 int last_time = (data != 0);
823 check_global_declarations (vec, len);
824 emit_debug_global_declarations (vec, len);
828 /* Write out any globals that need to be output. */
829 return wrapup_global_declarations (vec, len);
833 /* In C++, you don't have to write `struct S' to refer to `S'; you
834 can just use `S'. We accomplish this by creating a TYPE_DECL as
835 if the user had written `typedef struct S S'. Create and return
836 the TYPE_DECL for TYPE. */
839 create_implicit_typedef (tree name, tree type)
843 decl = build_decl (input_location, TYPE_DECL, name, type);
844 DECL_ARTIFICIAL (decl) = 1;
845 /* There are other implicit type declarations, like the one *within*
846 a class that allows you to write `S::S'. We must distinguish
848 SET_DECL_IMPLICIT_TYPEDEF_P (decl);
849 TYPE_NAME (type) = decl;
850 TYPE_STUB_DECL (type) = decl;
855 /* Remember a local name for name-mangling purposes. */
858 push_local_name (tree decl)
863 timevar_push (TV_NAME_LOOKUP);
865 name = DECL_NAME (decl);
867 nelts = VEC_length (tree, local_names);
868 for (i = 0; i < nelts; i++)
870 t = VEC_index (tree, local_names, i);
871 if (DECL_NAME (t) == name)
873 if (!DECL_LANG_SPECIFIC (decl))
874 retrofit_lang_decl (decl);
875 DECL_LANG_SPECIFIC (decl)->u.base.u2sel = 1;
876 if (DECL_LANG_SPECIFIC (t))
877 DECL_DISCRIMINATOR (decl) = DECL_DISCRIMINATOR (t) + 1;
879 DECL_DISCRIMINATOR (decl) = 1;
881 VEC_replace (tree, local_names, i, decl);
882 timevar_pop (TV_NAME_LOOKUP);
887 VEC_safe_push (tree, gc, local_names, decl);
888 timevar_pop (TV_NAME_LOOKUP);
891 /* Subroutine of duplicate_decls: return truthvalue of whether
892 or not types of these decls match.
894 For C++, we must compare the parameter list so that `int' can match
895 `int&' in a parameter position, but `int&' is not confused with
899 decls_match (tree newdecl, tree olddecl)
903 if (newdecl == olddecl)
906 if (TREE_CODE (newdecl) != TREE_CODE (olddecl))
907 /* If the two DECLs are not even the same kind of thing, we're not
908 interested in their types. */
911 if (TREE_CODE (newdecl) == FUNCTION_DECL)
913 tree f1 = TREE_TYPE (newdecl);
914 tree f2 = TREE_TYPE (olddecl);
915 tree p1 = TYPE_ARG_TYPES (f1);
916 tree p2 = TYPE_ARG_TYPES (f2);
918 /* Specializations of different templates are different functions
919 even if they have the same type. */
920 tree t1 = (DECL_USE_TEMPLATE (newdecl)
921 ? DECL_TI_TEMPLATE (newdecl)
923 tree t2 = (DECL_USE_TEMPLATE (olddecl)
924 ? DECL_TI_TEMPLATE (olddecl)
929 if (CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl)
930 && ! (DECL_EXTERN_C_P (newdecl)
931 && DECL_EXTERN_C_P (olddecl)))
934 #ifdef NO_IMPLICIT_EXTERN_C
935 /* A new declaration doesn't match a built-in one unless it
936 is also extern "C". */
937 if (DECL_IS_BUILTIN (olddecl)
938 && DECL_EXTERN_C_P (olddecl) && !DECL_EXTERN_C_P (newdecl))
942 if (TREE_CODE (f1) != TREE_CODE (f2))
945 if (same_type_p (TREE_TYPE (f1), TREE_TYPE (f2)))
947 if (p2 == NULL_TREE && DECL_EXTERN_C_P (olddecl)
948 && (DECL_BUILT_IN (olddecl)
949 #ifndef NO_IMPLICIT_EXTERN_C
950 || (DECL_IN_SYSTEM_HEADER (newdecl) && !DECL_CLASS_SCOPE_P (newdecl))
951 || (DECL_IN_SYSTEM_HEADER (olddecl) && !DECL_CLASS_SCOPE_P (olddecl))
955 types_match = self_promoting_args_p (p1);
956 if (p1 == void_list_node)
957 TREE_TYPE (newdecl) = TREE_TYPE (olddecl);
959 #ifndef NO_IMPLICIT_EXTERN_C
960 else if (p1 == NULL_TREE
961 && (DECL_EXTERN_C_P (olddecl)
962 && DECL_IN_SYSTEM_HEADER (olddecl)
963 && !DECL_CLASS_SCOPE_P (olddecl))
964 && (DECL_EXTERN_C_P (newdecl)
965 && DECL_IN_SYSTEM_HEADER (newdecl)
966 && !DECL_CLASS_SCOPE_P (newdecl)))
968 types_match = self_promoting_args_p (p2);
969 TREE_TYPE (newdecl) = TREE_TYPE (olddecl);
973 types_match = compparms (p1, p2);
978 else if (TREE_CODE (newdecl) == TEMPLATE_DECL)
980 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl))
981 != TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)))
984 if (!comp_template_parms (DECL_TEMPLATE_PARMS (newdecl),
985 DECL_TEMPLATE_PARMS (olddecl)))
988 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
989 types_match = same_type_p (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl)),
990 TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl)));
992 types_match = decls_match (DECL_TEMPLATE_RESULT (olddecl),
993 DECL_TEMPLATE_RESULT (newdecl));
997 /* Need to check scope for variable declaration (VAR_DECL).
998 For typedef (TYPE_DECL), scope is ignored. */
999 if (TREE_CODE (newdecl) == VAR_DECL
1000 && CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl)
1002 Two declarations for an object with C language linkage
1003 with the same name (ignoring the namespace that qualify
1004 it) that appear in different namespace scopes refer to
1006 && !(DECL_EXTERN_C_P (olddecl) && DECL_EXTERN_C_P (newdecl)))
1009 if (TREE_TYPE (newdecl) == error_mark_node)
1010 types_match = TREE_TYPE (olddecl) == error_mark_node;
1011 else if (TREE_TYPE (olddecl) == NULL_TREE)
1012 types_match = TREE_TYPE (newdecl) == NULL_TREE;
1013 else if (TREE_TYPE (newdecl) == NULL_TREE)
1016 types_match = comptypes (TREE_TYPE (newdecl),
1017 TREE_TYPE (olddecl),
1018 COMPARE_REDECLARATION);
1024 /* If NEWDECL is `static' and an `extern' was seen previously,
1025 warn about it. OLDDECL is the previous declaration.
1027 Note that this does not apply to the C++ case of declaring
1028 a variable `extern const' and then later `const'.
1030 Don't complain about built-in functions, since they are beyond
1031 the user's control. */
1034 warn_extern_redeclared_static (tree newdecl, tree olddecl)
1036 if (TREE_CODE (newdecl) == TYPE_DECL
1037 || TREE_CODE (newdecl) == TEMPLATE_DECL
1038 || TREE_CODE (newdecl) == CONST_DECL
1039 || TREE_CODE (newdecl) == NAMESPACE_DECL)
1042 /* Don't get confused by static member functions; that's a different
1044 if (TREE_CODE (newdecl) == FUNCTION_DECL
1045 && DECL_STATIC_FUNCTION_P (newdecl))
1048 /* If the old declaration was `static', or the new one isn't, then
1049 then everything is OK. */
1050 if (DECL_THIS_STATIC (olddecl) || !DECL_THIS_STATIC (newdecl))
1053 /* It's OK to declare a builtin function as `static'. */
1054 if (TREE_CODE (olddecl) == FUNCTION_DECL
1055 && DECL_ARTIFICIAL (olddecl))
1058 permerror (input_location, "%qD was declared %<extern%> and later %<static%>", newdecl);
1059 permerror (input_location, "previous declaration of %q+D", olddecl);
1062 /* NEW_DECL is a redeclaration of OLD_DECL; both are functions or
1063 function templates. If their exception specifications do not
1064 match, issue a diagnostic. */
1067 check_redeclaration_exception_specification (tree new_decl,
1072 tree new_exceptions;
1073 tree old_exceptions;
1075 new_type = TREE_TYPE (new_decl);
1076 new_exceptions = TYPE_RAISES_EXCEPTIONS (new_type);
1077 old_type = TREE_TYPE (old_decl);
1078 old_exceptions = TYPE_RAISES_EXCEPTIONS (old_type);
1082 If any declaration of a function has an exception-specification,
1083 all declarations, including the definition and an explicit
1084 specialization, of that function shall have an
1085 exception-specification with the same set of type-ids. */
1086 if ((pedantic || ! DECL_IN_SYSTEM_HEADER (old_decl))
1087 && ! DECL_IS_BUILTIN (old_decl)
1089 && !comp_except_specs (new_exceptions, old_exceptions,
1092 error ("declaration of %qF throws different exceptions", new_decl);
1093 error ("from previous declaration %q+F", old_decl);
1097 #define GNU_INLINE_P(fn) (DECL_DECLARED_INLINE_P (fn) \
1098 && lookup_attribute ("gnu_inline", \
1099 DECL_ATTRIBUTES (fn)))
1101 /* If NEWDECL is a redeclaration of OLDDECL, merge the declarations.
1102 If the redeclaration is invalid, a diagnostic is issued, and the
1103 error_mark_node is returned. Otherwise, OLDDECL is returned.
1105 If NEWDECL is not a redeclaration of OLDDECL, NULL_TREE is
1108 NEWDECL_IS_FRIEND is true if NEWDECL was declared as a friend. */
1111 duplicate_decls (tree newdecl, tree olddecl, bool newdecl_is_friend)
1113 unsigned olddecl_uid = DECL_UID (olddecl);
1114 int olddecl_friend = 0, types_match = 0, hidden_friend = 0;
1115 int new_defines_function = 0;
1116 tree new_template_info;
1118 if (newdecl == olddecl)
1121 types_match = decls_match (newdecl, olddecl);
1123 /* If either the type of the new decl or the type of the old decl is an
1124 error_mark_node, then that implies that we have already issued an
1125 error (earlier) for some bogus type specification, and in that case,
1126 it is rather pointless to harass the user with yet more error message
1127 about the same declaration, so just pretend the types match here. */
1128 if (TREE_TYPE (newdecl) == error_mark_node
1129 || TREE_TYPE (olddecl) == error_mark_node)
1130 return error_mark_node;
1132 if (DECL_P (olddecl)
1133 && TREE_CODE (newdecl) == FUNCTION_DECL
1134 && TREE_CODE (olddecl) == FUNCTION_DECL
1135 && (DECL_UNINLINABLE (newdecl) || DECL_UNINLINABLE (olddecl)))
1137 if (DECL_DECLARED_INLINE_P (newdecl)
1138 && DECL_UNINLINABLE (newdecl)
1139 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl)))
1140 /* Already warned elsewhere. */;
1141 else if (DECL_DECLARED_INLINE_P (olddecl)
1142 && DECL_UNINLINABLE (olddecl)
1143 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl)))
1144 /* Already warned. */;
1145 else if (DECL_DECLARED_INLINE_P (newdecl)
1146 && DECL_UNINLINABLE (olddecl)
1147 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl)))
1149 warning (OPT_Wattributes, "function %q+D redeclared as inline",
1151 warning (OPT_Wattributes, "previous declaration of %q+D "
1152 "with attribute noinline", olddecl);
1154 else if (DECL_DECLARED_INLINE_P (olddecl)
1155 && DECL_UNINLINABLE (newdecl)
1156 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl)))
1158 warning (OPT_Wattributes, "function %q+D redeclared with "
1159 "attribute noinline", newdecl);
1160 warning (OPT_Wattributes, "previous declaration of %q+D was inline",
1165 /* Check for redeclaration and other discrepancies. */
1166 if (TREE_CODE (olddecl) == FUNCTION_DECL
1167 && DECL_ARTIFICIAL (olddecl))
1169 gcc_assert (!DECL_HIDDEN_FRIEND_P (olddecl));
1170 if (TREE_CODE (newdecl) != FUNCTION_DECL)
1172 /* Avoid warnings redeclaring built-ins which have not been
1173 explicitly declared. */
1174 if (DECL_ANTICIPATED (olddecl))
1177 /* If you declare a built-in or predefined function name as static,
1178 the old definition is overridden, but optionally warn this was a
1179 bad choice of name. */
1180 if (! TREE_PUBLIC (newdecl))
1182 warning (OPT_Wshadow,
1183 DECL_BUILT_IN (olddecl)
1184 ? G_("shadowing built-in function %q#D")
1185 : G_("shadowing library function %q#D"), olddecl);
1186 /* Discard the old built-in function. */
1189 /* If the built-in is not ansi, then programs can override
1190 it even globally without an error. */
1191 else if (! DECL_BUILT_IN (olddecl))
1192 warning (0, "library function %q#D redeclared as non-function %q#D",
1196 error ("declaration of %q#D", newdecl);
1197 error ("conflicts with built-in declaration %q#D",
1202 else if (!types_match)
1204 /* Avoid warnings redeclaring built-ins which have not been
1205 explicitly declared. */
1206 if (DECL_ANTICIPATED (olddecl))
1208 /* Deal with fileptr_type_node. FILE type is not known
1209 at the time we create the builtins. */
1212 for (t1 = TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1213 t2 = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1215 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2))
1218 else if (TREE_VALUE (t2) == fileptr_type_node)
1220 tree t = TREE_VALUE (t1);
1222 if (TREE_CODE (t) == POINTER_TYPE
1223 && TYPE_NAME (TREE_TYPE (t))
1224 && DECL_NAME (TYPE_NAME (TREE_TYPE (t)))
1225 == get_identifier ("FILE")
1226 && compparms (TREE_CHAIN (t1), TREE_CHAIN (t2)))
1228 tree oldargs = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1230 TYPE_ARG_TYPES (TREE_TYPE (olddecl))
1231 = TYPE_ARG_TYPES (TREE_TYPE (newdecl));
1232 types_match = decls_match (newdecl, olddecl);
1234 return duplicate_decls (newdecl, olddecl,
1236 TYPE_ARG_TYPES (TREE_TYPE (olddecl)) = oldargs;
1239 else if (! same_type_p (TREE_VALUE (t1), TREE_VALUE (t2)))
1242 else if ((DECL_EXTERN_C_P (newdecl)
1243 && DECL_EXTERN_C_P (olddecl))
1244 || compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1245 TYPE_ARG_TYPES (TREE_TYPE (olddecl))))
1247 /* A near match; override the builtin. */
1249 if (TREE_PUBLIC (newdecl))
1251 warning (0, "new declaration %q#D", newdecl);
1252 warning (0, "ambiguates built-in declaration %q#D",
1256 warning (OPT_Wshadow,
1257 DECL_BUILT_IN (olddecl)
1258 ? G_("shadowing built-in function %q#D")
1259 : G_("shadowing library function %q#D"), olddecl);
1262 /* Discard the old built-in function. */
1265 /* Replace the old RTL to avoid problems with inlining. */
1266 COPY_DECL_RTL (newdecl, olddecl);
1268 /* Even if the types match, prefer the new declarations type for
1269 built-ins which have not been explicitly declared, for
1270 exception lists, etc... */
1271 else if (DECL_ANTICIPATED (olddecl))
1273 tree type = TREE_TYPE (newdecl);
1274 tree attribs = (*targetm.merge_type_attributes)
1275 (TREE_TYPE (olddecl), type);
1277 type = cp_build_type_attribute_variant (type, attribs);
1278 TREE_TYPE (newdecl) = TREE_TYPE (olddecl) = type;
1281 /* If a function is explicitly declared "throw ()", propagate that to
1282 the corresponding builtin. */
1283 if (DECL_BUILT_IN_CLASS (olddecl) == BUILT_IN_NORMAL
1284 && DECL_ANTICIPATED (olddecl)
1285 && TREE_NOTHROW (newdecl)
1286 && !TREE_NOTHROW (olddecl)
1287 && built_in_decls [DECL_FUNCTION_CODE (olddecl)] != NULL_TREE
1288 && built_in_decls [DECL_FUNCTION_CODE (olddecl)] != olddecl
1290 TREE_NOTHROW (built_in_decls [DECL_FUNCTION_CODE (olddecl)]) = 1;
1292 /* Whether or not the builtin can throw exceptions has no
1293 bearing on this declarator. */
1294 TREE_NOTHROW (olddecl) = 0;
1296 if (DECL_THIS_STATIC (newdecl) && !DECL_THIS_STATIC (olddecl))
1298 /* If a builtin function is redeclared as `static', merge
1299 the declarations, but make the original one static. */
1300 DECL_THIS_STATIC (olddecl) = 1;
1301 TREE_PUBLIC (olddecl) = 0;
1303 /* Make the old declaration consistent with the new one so
1304 that all remnants of the builtin-ness of this function
1305 will be banished. */
1306 SET_DECL_LANGUAGE (olddecl, DECL_LANGUAGE (newdecl));
1307 COPY_DECL_RTL (newdecl, olddecl);
1310 else if (TREE_CODE (olddecl) != TREE_CODE (newdecl))
1312 /* C++ Standard, 3.3, clause 4:
1313 "[Note: a namespace name or a class template name must be unique
1314 in its declarative region (7.3.2, clause 14). ]" */
1315 if (TREE_CODE (olddecl) != NAMESPACE_DECL
1316 && TREE_CODE (newdecl) != NAMESPACE_DECL
1317 && (TREE_CODE (olddecl) != TEMPLATE_DECL
1318 || TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) != TYPE_DECL)
1319 && (TREE_CODE (newdecl) != TEMPLATE_DECL
1320 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) != TYPE_DECL))
1322 if ((TREE_CODE (olddecl) == TYPE_DECL && DECL_ARTIFICIAL (olddecl)
1323 && TREE_CODE (newdecl) != TYPE_DECL)
1324 || (TREE_CODE (newdecl) == TYPE_DECL && DECL_ARTIFICIAL (newdecl)
1325 && TREE_CODE (olddecl) != TYPE_DECL))
1327 /* We do nothing special here, because C++ does such nasty
1328 things with TYPE_DECLs. Instead, just let the TYPE_DECL
1329 get shadowed, and know that if we need to find a TYPE_DECL
1330 for a given name, we can look in the IDENTIFIER_TYPE_VALUE
1331 slot of the identifier. */
1335 if ((TREE_CODE (newdecl) == FUNCTION_DECL
1336 && DECL_FUNCTION_TEMPLATE_P (olddecl))
1337 || (TREE_CODE (olddecl) == FUNCTION_DECL
1338 && DECL_FUNCTION_TEMPLATE_P (newdecl)))
1342 error ("%q#D redeclared as different kind of symbol", newdecl);
1343 if (TREE_CODE (olddecl) == TREE_LIST)
1344 olddecl = TREE_VALUE (olddecl);
1345 error ("previous declaration of %q+#D", olddecl);
1347 return error_mark_node;
1349 else if (!types_match)
1351 if (CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl))
1352 /* These are certainly not duplicate declarations; they're
1353 from different scopes. */
1356 if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1358 /* The name of a class template may not be declared to refer to
1359 any other template, class, function, object, namespace, value,
1360 or type in the same scope. */
1361 if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) == TYPE_DECL
1362 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
1364 error ("declaration of template %q#D", newdecl);
1365 error ("conflicts with previous declaration %q+#D", olddecl);
1367 else if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) == FUNCTION_DECL
1368 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == FUNCTION_DECL
1369 && compparms (TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl))),
1370 TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl))))
1371 && comp_template_parms (DECL_TEMPLATE_PARMS (newdecl),
1372 DECL_TEMPLATE_PARMS (olddecl))
1373 /* Template functions can be disambiguated by
1375 && same_type_p (TREE_TYPE (TREE_TYPE (newdecl)),
1376 TREE_TYPE (TREE_TYPE (olddecl))))
1378 error ("new declaration %q#D", newdecl);
1379 error ("ambiguates old declaration %q+#D", olddecl);
1383 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1385 if (DECL_EXTERN_C_P (newdecl) && DECL_EXTERN_C_P (olddecl))
1387 error ("declaration of C function %q#D conflicts with",
1389 error ("previous declaration %q+#D here", olddecl);
1391 else if (compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1392 TYPE_ARG_TYPES (TREE_TYPE (olddecl))))
1394 error ("new declaration %q#D", newdecl);
1395 error ("ambiguates old declaration %q+#D", olddecl);
1396 return error_mark_node;
1403 error ("conflicting declaration %q#D", newdecl);
1404 error ("%q+D has a previous declaration as %q#D", olddecl, olddecl);
1405 return error_mark_node;
1408 else if (TREE_CODE (newdecl) == FUNCTION_DECL
1409 && ((DECL_TEMPLATE_SPECIALIZATION (olddecl)
1410 && (!DECL_TEMPLATE_INFO (newdecl)
1411 || (DECL_TI_TEMPLATE (newdecl)
1412 != DECL_TI_TEMPLATE (olddecl))))
1413 || (DECL_TEMPLATE_SPECIALIZATION (newdecl)
1414 && (!DECL_TEMPLATE_INFO (olddecl)
1415 || (DECL_TI_TEMPLATE (olddecl)
1416 != DECL_TI_TEMPLATE (newdecl))))))
1417 /* It's OK to have a template specialization and a non-template
1418 with the same type, or to have specializations of two
1419 different templates with the same type. Note that if one is a
1420 specialization, and the other is an instantiation of the same
1421 template, that we do not exit at this point. That situation
1422 can occur if we instantiate a template class, and then
1423 specialize one of its methods. This situation is valid, but
1424 the declarations must be merged in the usual way. */
1426 else if (TREE_CODE (newdecl) == FUNCTION_DECL
1427 && ((DECL_TEMPLATE_INSTANTIATION (olddecl)
1428 && !DECL_USE_TEMPLATE (newdecl))
1429 || (DECL_TEMPLATE_INSTANTIATION (newdecl)
1430 && !DECL_USE_TEMPLATE (olddecl))))
1431 /* One of the declarations is a template instantiation, and the
1432 other is not a template at all. That's OK. */
1434 else if (TREE_CODE (newdecl) == NAMESPACE_DECL)
1436 /* In [namespace.alias] we have:
1438 In a declarative region, a namespace-alias-definition can be
1439 used to redefine a namespace-alias declared in that declarative
1440 region to refer only to the namespace to which it already
1443 Therefore, if we encounter a second alias directive for the same
1444 alias, we can just ignore the second directive. */
1445 if (DECL_NAMESPACE_ALIAS (newdecl)
1446 && (DECL_NAMESPACE_ALIAS (newdecl)
1447 == DECL_NAMESPACE_ALIAS (olddecl)))
1449 /* [namespace.alias]
1451 A namespace-name or namespace-alias shall not be declared as
1452 the name of any other entity in the same declarative region.
1453 A namespace-name defined at global scope shall not be
1454 declared as the name of any other entity in any global scope
1456 error ("declaration of namespace %qD conflicts with", newdecl);
1457 error ("previous declaration of namespace %q+D here", olddecl);
1458 return error_mark_node;
1462 const char *errmsg = redeclaration_error_message (newdecl, olddecl);
1465 error_at (DECL_SOURCE_LOCATION (newdecl), errmsg, newdecl);
1466 if (DECL_NAME (olddecl) != NULL_TREE)
1467 error ((DECL_INITIAL (olddecl) && namespace_bindings_p ())
1468 ? "%q+#D previously defined here"
1469 : "%q+#D previously declared here", olddecl);
1470 return error_mark_node;
1472 else if (TREE_CODE (olddecl) == FUNCTION_DECL
1473 && DECL_INITIAL (olddecl) != NULL_TREE
1474 && TYPE_ARG_TYPES (TREE_TYPE (olddecl)) == NULL_TREE
1475 && TYPE_ARG_TYPES (TREE_TYPE (newdecl)) != NULL_TREE)
1477 /* Prototype decl follows defn w/o prototype. */
1478 warning_at (input_location, 0, "prototype for %q+#D", newdecl);
1479 warning_at (DECL_SOURCE_LOCATION (olddecl), 0,
1480 "follows non-prototype definition here");
1482 else if ((TREE_CODE (olddecl) == FUNCTION_DECL
1483 || TREE_CODE (olddecl) == VAR_DECL)
1484 && DECL_LANGUAGE (newdecl) != DECL_LANGUAGE (olddecl))
1487 If two declarations of the same function or object
1488 specify different linkage-specifications ..., the program
1489 is ill-formed.... Except for functions with C++ linkage,
1490 a function declaration without a linkage specification
1491 shall not precede the first linkage specification for
1492 that function. A function can be declared without a
1493 linkage specification after an explicit linkage
1494 specification has been seen; the linkage explicitly
1495 specified in the earlier declaration is not affected by
1496 such a function declaration.
1498 DR 563 raises the question why the restrictions on
1499 functions should not also apply to objects. Older
1500 versions of G++ silently ignore the linkage-specification
1508 which is clearly wrong. Therefore, we now treat objects
1510 if (current_lang_depth () == 0)
1512 /* There is no explicit linkage-specification, so we use
1513 the linkage from the previous declaration. */
1514 if (!DECL_LANG_SPECIFIC (newdecl))
1515 retrofit_lang_decl (newdecl);
1516 SET_DECL_LANGUAGE (newdecl, DECL_LANGUAGE (olddecl));
1520 error ("previous declaration of %q+#D with %qL linkage",
1521 olddecl, DECL_LANGUAGE (olddecl));
1522 error ("conflicts with new declaration with %qL linkage",
1523 DECL_LANGUAGE (newdecl));
1527 if (DECL_LANG_SPECIFIC (olddecl) && DECL_USE_TEMPLATE (olddecl))
1529 else if (TREE_CODE (olddecl) == FUNCTION_DECL)
1531 tree t1 = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1532 tree t2 = TYPE_ARG_TYPES (TREE_TYPE (newdecl));
1535 if (TREE_CODE (TREE_TYPE (newdecl)) == METHOD_TYPE)
1536 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2);
1538 for (; t1 && t1 != void_list_node;
1539 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2), i++)
1540 if (TREE_PURPOSE (t1) && TREE_PURPOSE (t2))
1542 if (1 == simple_cst_equal (TREE_PURPOSE (t1),
1545 permerror (input_location, "default argument given for parameter %d of %q#D",
1547 permerror (input_location, "after previous specification in %q+#D", olddecl);
1551 error ("default argument given for parameter %d of %q#D",
1553 error ("after previous specification in %q+#D",
1560 /* Do not merge an implicit typedef with an explicit one. In:
1564 typedef class A A __attribute__ ((foo));
1566 the attribute should apply only to the typedef. */
1567 if (TREE_CODE (olddecl) == TYPE_DECL
1568 && (DECL_IMPLICIT_TYPEDEF_P (olddecl)
1569 || DECL_IMPLICIT_TYPEDEF_P (newdecl)))
1572 /* If new decl is `static' and an `extern' was seen previously,
1574 warn_extern_redeclared_static (newdecl, olddecl);
1576 /* We have committed to returning 1 at this point. */
1577 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1579 /* Now that functions must hold information normally held
1580 by field decls, there is extra work to do so that
1581 declaration information does not get destroyed during
1583 if (DECL_VINDEX (olddecl))
1584 DECL_VINDEX (newdecl) = DECL_VINDEX (olddecl);
1585 if (DECL_CONTEXT (olddecl))
1586 DECL_CONTEXT (newdecl) = DECL_CONTEXT (olddecl);
1587 DECL_STATIC_CONSTRUCTOR (newdecl) |= DECL_STATIC_CONSTRUCTOR (olddecl);
1588 DECL_STATIC_DESTRUCTOR (newdecl) |= DECL_STATIC_DESTRUCTOR (olddecl);
1589 DECL_PURE_VIRTUAL_P (newdecl) |= DECL_PURE_VIRTUAL_P (olddecl);
1590 DECL_VIRTUAL_P (newdecl) |= DECL_VIRTUAL_P (olddecl);
1591 DECL_INVALID_OVERRIDER_P (newdecl) |= DECL_INVALID_OVERRIDER_P (olddecl);
1592 DECL_THIS_STATIC (newdecl) |= DECL_THIS_STATIC (olddecl);
1593 if (DECL_OVERLOADED_OPERATOR_P (olddecl) != ERROR_MARK)
1594 SET_OVERLOADED_OPERATOR_CODE
1595 (newdecl, DECL_OVERLOADED_OPERATOR_P (olddecl));
1596 new_defines_function = DECL_INITIAL (newdecl) != NULL_TREE;
1598 /* Optionally warn about more than one declaration for the same
1599 name, but don't warn about a function declaration followed by a
1601 if (warn_redundant_decls && ! DECL_ARTIFICIAL (olddecl)
1602 && !(new_defines_function && DECL_INITIAL (olddecl) == NULL_TREE)
1603 /* Don't warn about extern decl followed by definition. */
1604 && !(DECL_EXTERNAL (olddecl) && ! DECL_EXTERNAL (newdecl))
1605 /* Don't warn about friends, let add_friend take care of it. */
1606 && ! (newdecl_is_friend || DECL_FRIEND_P (olddecl)))
1608 warning (OPT_Wredundant_decls, "redundant redeclaration of %qD in same scope", newdecl);
1609 warning (OPT_Wredundant_decls, "previous declaration of %q+D", olddecl);
1612 if (DECL_DELETED_FN (newdecl))
1614 error ("deleted definition of %qD", newdecl);
1615 error ("after previous declaration %q+D", olddecl);
1619 /* Deal with C++: must preserve virtual function table size. */
1620 if (TREE_CODE (olddecl) == TYPE_DECL)
1622 tree newtype = TREE_TYPE (newdecl);
1623 tree oldtype = TREE_TYPE (olddecl);
1625 if (newtype != error_mark_node && oldtype != error_mark_node
1626 && TYPE_LANG_SPECIFIC (newtype) && TYPE_LANG_SPECIFIC (oldtype))
1627 CLASSTYPE_FRIEND_CLASSES (newtype)
1628 = CLASSTYPE_FRIEND_CLASSES (oldtype);
1630 DECL_ORIGINAL_TYPE (newdecl) = DECL_ORIGINAL_TYPE (olddecl);
1633 /* Copy all the DECL_... slots specified in the new decl
1634 except for any that we copy here from the old type. */
1635 DECL_ATTRIBUTES (newdecl)
1636 = (*targetm.merge_decl_attributes) (olddecl, newdecl);
1638 if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1642 old_result = DECL_TEMPLATE_RESULT (olddecl);
1643 new_result = DECL_TEMPLATE_RESULT (newdecl);
1644 TREE_TYPE (olddecl) = TREE_TYPE (old_result);
1645 DECL_TEMPLATE_SPECIALIZATIONS (olddecl)
1646 = chainon (DECL_TEMPLATE_SPECIALIZATIONS (olddecl),
1647 DECL_TEMPLATE_SPECIALIZATIONS (newdecl));
1649 DECL_ATTRIBUTES (old_result)
1650 = (*targetm.merge_decl_attributes) (old_result, new_result);
1652 if (DECL_FUNCTION_TEMPLATE_P (newdecl))
1654 if (GNU_INLINE_P (old_result) != GNU_INLINE_P (new_result)
1655 && DECL_INITIAL (new_result))
1657 if (DECL_INITIAL (old_result))
1658 DECL_UNINLINABLE (old_result) = 1;
1660 DECL_UNINLINABLE (old_result) = DECL_UNINLINABLE (new_result);
1661 DECL_EXTERNAL (old_result) = DECL_EXTERNAL (new_result);
1662 DECL_NOT_REALLY_EXTERN (old_result)
1663 = DECL_NOT_REALLY_EXTERN (new_result);
1664 DECL_INTERFACE_KNOWN (old_result)
1665 = DECL_INTERFACE_KNOWN (new_result);
1666 DECL_DECLARED_INLINE_P (old_result)
1667 = DECL_DECLARED_INLINE_P (new_result);
1668 DECL_DISREGARD_INLINE_LIMITS (old_result)
1669 |= DECL_DISREGARD_INLINE_LIMITS (new_result);
1674 DECL_DECLARED_INLINE_P (old_result)
1675 |= DECL_DECLARED_INLINE_P (new_result);
1676 DECL_DISREGARD_INLINE_LIMITS (old_result)
1677 |= DECL_DISREGARD_INLINE_LIMITS (new_result);
1678 check_redeclaration_exception_specification (newdecl, olddecl);
1682 /* If the new declaration is a definition, update the file and
1683 line information on the declaration, and also make
1684 the old declaration the same definition. */
1685 if (DECL_INITIAL (new_result) != NULL_TREE)
1687 DECL_SOURCE_LOCATION (olddecl)
1688 = DECL_SOURCE_LOCATION (old_result)
1689 = DECL_SOURCE_LOCATION (newdecl);
1690 DECL_INITIAL (old_result) = DECL_INITIAL (new_result);
1691 if (DECL_FUNCTION_TEMPLATE_P (newdecl))
1694 DECL_ARGUMENTS (old_result)
1695 = DECL_ARGUMENTS (new_result);
1696 for (parm = DECL_ARGUMENTS (old_result); parm;
1697 parm = TREE_CHAIN (parm))
1698 DECL_CONTEXT (parm) = old_result;
1707 /* Automatically handles default parameters. */
1708 tree oldtype = TREE_TYPE (olddecl);
1711 /* Merge the data types specified in the two decls. */
1712 newtype = merge_types (TREE_TYPE (newdecl), TREE_TYPE (olddecl));
1714 /* If merge_types produces a non-typedef type, just use the old type. */
1715 if (TREE_CODE (newdecl) == TYPE_DECL
1716 && newtype == DECL_ORIGINAL_TYPE (newdecl))
1719 if (TREE_CODE (newdecl) == VAR_DECL)
1721 DECL_THIS_EXTERN (newdecl) |= DECL_THIS_EXTERN (olddecl);
1722 DECL_INITIALIZED_P (newdecl) |= DECL_INITIALIZED_P (olddecl);
1723 DECL_NONTRIVIALLY_INITIALIZED_P (newdecl)
1724 |= DECL_NONTRIVIALLY_INITIALIZED_P (olddecl);
1725 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (newdecl)
1726 |= DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (olddecl);
1728 /* Merge the threadprivate attribute from OLDDECL into NEWDECL. */
1729 if (DECL_LANG_SPECIFIC (olddecl)
1730 && CP_DECL_THREADPRIVATE_P (olddecl))
1732 /* Allocate a LANG_SPECIFIC structure for NEWDECL, if needed. */
1733 if (!DECL_LANG_SPECIFIC (newdecl))
1734 retrofit_lang_decl (newdecl);
1736 DECL_TLS_MODEL (newdecl) = DECL_TLS_MODEL (olddecl);
1737 CP_DECL_THREADPRIVATE_P (newdecl) = 1;
1741 /* Do this after calling `merge_types' so that default
1742 parameters don't confuse us. */
1743 else if (TREE_CODE (newdecl) == FUNCTION_DECL)
1744 check_redeclaration_exception_specification (newdecl, olddecl);
1745 TREE_TYPE (newdecl) = TREE_TYPE (olddecl) = newtype;
1747 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1748 check_default_args (newdecl);
1750 /* Lay the type out, unless already done. */
1751 if (! same_type_p (newtype, oldtype)
1752 && TREE_TYPE (newdecl) != error_mark_node
1753 && !(processing_template_decl && uses_template_parms (newdecl)))
1754 layout_type (TREE_TYPE (newdecl));
1756 if ((TREE_CODE (newdecl) == VAR_DECL
1757 || TREE_CODE (newdecl) == PARM_DECL
1758 || TREE_CODE (newdecl) == RESULT_DECL
1759 || TREE_CODE (newdecl) == FIELD_DECL
1760 || TREE_CODE (newdecl) == TYPE_DECL)
1761 && !(processing_template_decl && uses_template_parms (newdecl)))
1762 layout_decl (newdecl, 0);
1764 /* Merge the type qualifiers. */
1765 if (TREE_READONLY (newdecl))
1766 TREE_READONLY (olddecl) = 1;
1767 if (TREE_THIS_VOLATILE (newdecl))
1768 TREE_THIS_VOLATILE (olddecl) = 1;
1769 if (TREE_NOTHROW (newdecl))
1770 TREE_NOTHROW (olddecl) = 1;
1772 /* Merge deprecatedness. */
1773 if (TREE_DEPRECATED (newdecl))
1774 TREE_DEPRECATED (olddecl) = 1;
1776 /* Preserve function specific target and optimization options */
1777 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1779 if (DECL_FUNCTION_SPECIFIC_TARGET (olddecl)
1780 && !DECL_FUNCTION_SPECIFIC_TARGET (newdecl))
1781 DECL_FUNCTION_SPECIFIC_TARGET (newdecl)
1782 = DECL_FUNCTION_SPECIFIC_TARGET (olddecl);
1784 if (DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl)
1785 && !DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl))
1786 DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl)
1787 = DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl);
1790 /* Merge the initialization information. */
1791 if (DECL_INITIAL (newdecl) == NULL_TREE
1792 && DECL_INITIAL (olddecl) != NULL_TREE)
1794 DECL_INITIAL (newdecl) = DECL_INITIAL (olddecl);
1795 DECL_SOURCE_LOCATION (newdecl) = DECL_SOURCE_LOCATION (olddecl);
1796 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1798 DECL_SAVED_TREE (newdecl) = DECL_SAVED_TREE (olddecl);
1799 DECL_STRUCT_FUNCTION (newdecl) = DECL_STRUCT_FUNCTION (olddecl);
1803 /* Merge the section attribute.
1804 We want to issue an error if the sections conflict but that must be
1805 done later in decl_attributes since we are called before attributes
1807 if (DECL_SECTION_NAME (newdecl) == NULL_TREE)
1808 DECL_SECTION_NAME (newdecl) = DECL_SECTION_NAME (olddecl);
1810 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1812 DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (newdecl)
1813 |= DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (olddecl);
1814 DECL_NO_LIMIT_STACK (newdecl) |= DECL_NO_LIMIT_STACK (olddecl);
1815 TREE_THIS_VOLATILE (newdecl) |= TREE_THIS_VOLATILE (olddecl);
1816 TREE_NOTHROW (newdecl) |= TREE_NOTHROW (olddecl);
1817 DECL_IS_MALLOC (newdecl) |= DECL_IS_MALLOC (olddecl);
1818 DECL_IS_OPERATOR_NEW (newdecl) |= DECL_IS_OPERATOR_NEW (olddecl);
1819 DECL_PURE_P (newdecl) |= DECL_PURE_P (olddecl);
1820 TREE_READONLY (newdecl) |= TREE_READONLY (olddecl);
1821 DECL_LOOPING_CONST_OR_PURE_P (newdecl)
1822 |= DECL_LOOPING_CONST_OR_PURE_P (olddecl);
1823 /* Keep the old RTL. */
1824 COPY_DECL_RTL (olddecl, newdecl);
1826 else if (TREE_CODE (newdecl) == VAR_DECL
1827 && (DECL_SIZE (olddecl) || !DECL_SIZE (newdecl)))
1829 /* Keep the old RTL. We cannot keep the old RTL if the old
1830 declaration was for an incomplete object and the new
1831 declaration is not since many attributes of the RTL will
1833 COPY_DECL_RTL (olddecl, newdecl);
1836 /* If cannot merge, then use the new type and qualifiers,
1837 and don't preserve the old rtl. */
1840 /* Clean out any memory we had of the old declaration. */
1841 tree oldstatic = value_member (olddecl, static_aggregates);
1843 TREE_VALUE (oldstatic) = error_mark_node;
1845 TREE_TYPE (olddecl) = TREE_TYPE (newdecl);
1846 TREE_READONLY (olddecl) = TREE_READONLY (newdecl);
1847 TREE_THIS_VOLATILE (olddecl) = TREE_THIS_VOLATILE (newdecl);
1848 TREE_SIDE_EFFECTS (olddecl) = TREE_SIDE_EFFECTS (newdecl);
1851 /* Merge the storage class information. */
1852 merge_weak (newdecl, olddecl);
1854 if (DECL_ONE_ONLY (olddecl))
1855 DECL_COMDAT_GROUP (newdecl) = DECL_COMDAT_GROUP (olddecl);
1857 DECL_DEFER_OUTPUT (newdecl) |= DECL_DEFER_OUTPUT (olddecl);
1858 TREE_PUBLIC (newdecl) = TREE_PUBLIC (olddecl);
1859 TREE_STATIC (olddecl) = TREE_STATIC (newdecl) |= TREE_STATIC (olddecl);
1860 if (! DECL_EXTERNAL (olddecl))
1861 DECL_EXTERNAL (newdecl) = 0;
1863 new_template_info = NULL_TREE;
1864 if (DECL_LANG_SPECIFIC (newdecl) && DECL_LANG_SPECIFIC (olddecl))
1866 bool new_redefines_gnu_inline = false;
1868 if (new_defines_function
1869 && ((DECL_INTERFACE_KNOWN (olddecl)
1870 && TREE_CODE (olddecl) == FUNCTION_DECL)
1871 || (TREE_CODE (olddecl) == TEMPLATE_DECL
1872 && (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl))
1873 == FUNCTION_DECL))))
1877 if (TREE_CODE (fn) == TEMPLATE_DECL)
1878 fn = DECL_TEMPLATE_RESULT (olddecl);
1880 new_redefines_gnu_inline = GNU_INLINE_P (fn) && DECL_INITIAL (fn);
1883 if (!new_redefines_gnu_inline)
1885 DECL_INTERFACE_KNOWN (newdecl) |= DECL_INTERFACE_KNOWN (olddecl);
1886 DECL_NOT_REALLY_EXTERN (newdecl) |= DECL_NOT_REALLY_EXTERN (olddecl);
1887 DECL_COMDAT (newdecl) |= DECL_COMDAT (olddecl);
1889 DECL_TEMPLATE_INSTANTIATED (newdecl)
1890 |= DECL_TEMPLATE_INSTANTIATED (olddecl);
1891 DECL_ODR_USED (newdecl) |= DECL_ODR_USED (olddecl);
1893 /* If the OLDDECL is an instantiation and/or specialization,
1894 then the NEWDECL must be too. But, it may not yet be marked
1895 as such if the caller has created NEWDECL, but has not yet
1896 figured out that it is a redeclaration. */
1897 if (!DECL_USE_TEMPLATE (newdecl))
1898 DECL_USE_TEMPLATE (newdecl) = DECL_USE_TEMPLATE (olddecl);
1900 /* Don't really know how much of the language-specific
1901 values we should copy from old to new. */
1902 DECL_IN_AGGR_P (newdecl) = DECL_IN_AGGR_P (olddecl);
1903 DECL_REPO_AVAILABLE_P (newdecl) = DECL_REPO_AVAILABLE_P (olddecl);
1904 DECL_INITIALIZED_IN_CLASS_P (newdecl)
1905 |= DECL_INITIALIZED_IN_CLASS_P (olddecl);
1907 if (LANG_DECL_HAS_MIN (newdecl))
1909 DECL_LANG_SPECIFIC (newdecl)->u.min.u2 =
1910 DECL_LANG_SPECIFIC (olddecl)->u.min.u2;
1911 if (DECL_TEMPLATE_INFO (newdecl))
1912 new_template_info = DECL_TEMPLATE_INFO (newdecl);
1913 DECL_TEMPLATE_INFO (newdecl) = DECL_TEMPLATE_INFO (olddecl);
1915 /* Only functions have these fields. */
1916 if (TREE_CODE (newdecl) == FUNCTION_DECL
1917 || DECL_FUNCTION_TEMPLATE_P (newdecl))
1919 DECL_NONCONVERTING_P (newdecl) = DECL_NONCONVERTING_P (olddecl);
1920 olddecl_friend = DECL_FRIEND_P (olddecl);
1921 hidden_friend = (DECL_ANTICIPATED (olddecl)
1922 && DECL_HIDDEN_FRIEND_P (olddecl)
1923 && newdecl_is_friend);
1924 DECL_BEFRIENDING_CLASSES (newdecl)
1925 = chainon (DECL_BEFRIENDING_CLASSES (newdecl),
1926 DECL_BEFRIENDING_CLASSES (olddecl));
1927 /* DECL_THUNKS is only valid for virtual functions,
1928 otherwise it is a DECL_FRIEND_CONTEXT. */
1929 if (DECL_VIRTUAL_P (newdecl))
1930 DECL_THUNKS (newdecl) = DECL_THUNKS (olddecl);
1932 /* Only variables have this field. */
1933 else if (TREE_CODE (newdecl) == VAR_DECL
1934 && VAR_HAD_UNKNOWN_BOUND (olddecl))
1935 SET_VAR_HAD_UNKNOWN_BOUND (newdecl);
1938 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1942 /* Merge parameter attributes. */
1943 tree oldarg, newarg;
1944 for (oldarg = DECL_ARGUMENTS(olddecl),
1945 newarg = DECL_ARGUMENTS(newdecl);
1947 oldarg = TREE_CHAIN(oldarg), newarg = TREE_CHAIN(newarg)) {
1948 DECL_ATTRIBUTES (newarg)
1949 = (*targetm.merge_decl_attributes) (oldarg, newarg);
1950 DECL_ATTRIBUTES (oldarg) = DECL_ATTRIBUTES (newarg);
1953 if (DECL_TEMPLATE_INSTANTIATION (olddecl)
1954 && !DECL_TEMPLATE_INSTANTIATION (newdecl))
1956 /* If newdecl is not a specialization, then it is not a
1957 template-related function at all. And that means that we
1958 should have exited above, returning 0. */
1959 gcc_assert (DECL_TEMPLATE_SPECIALIZATION (newdecl));
1961 if (DECL_ODR_USED (olddecl))
1962 /* From [temp.expl.spec]:
1964 If a template, a member template or the member of a class
1965 template is explicitly specialized then that
1966 specialization shall be declared before the first use of
1967 that specialization that would cause an implicit
1968 instantiation to take place, in every translation unit in
1969 which such a use occurs. */
1970 error ("explicit specialization of %qD after first use",
1973 SET_DECL_TEMPLATE_SPECIALIZATION (olddecl);
1975 /* Don't propagate visibility from the template to the
1976 specialization here. We'll do that in determine_visibility if
1978 DECL_VISIBILITY_SPECIFIED (olddecl) = 0;
1980 /* [temp.expl.spec/14] We don't inline explicit specialization
1981 just because the primary template says so. */
1983 else if (new_defines_function && DECL_INITIAL (olddecl))
1985 /* Never inline re-defined extern inline functions.
1986 FIXME: this could be better handled by keeping both
1987 function as separate declarations. */
1988 DECL_UNINLINABLE (newdecl) = 1;
1992 if (DECL_PENDING_INLINE_INFO (newdecl) == 0)
1993 DECL_PENDING_INLINE_INFO (newdecl) = DECL_PENDING_INLINE_INFO (olddecl);
1995 DECL_DECLARED_INLINE_P (newdecl) |= DECL_DECLARED_INLINE_P (olddecl);
1997 DECL_UNINLINABLE (newdecl) = DECL_UNINLINABLE (olddecl)
1998 = (DECL_UNINLINABLE (newdecl) || DECL_UNINLINABLE (olddecl));
2000 DECL_DISREGARD_INLINE_LIMITS (newdecl)
2001 = DECL_DISREGARD_INLINE_LIMITS (olddecl)
2002 = (DECL_DISREGARD_INLINE_LIMITS (newdecl)
2003 || DECL_DISREGARD_INLINE_LIMITS (olddecl));
2006 /* Preserve abstractness on cloned [cd]tors. */
2007 DECL_ABSTRACT (newdecl) = DECL_ABSTRACT (olddecl);
2009 /* Update newdecl's parms to point at olddecl. */
2010 for (parm = DECL_ARGUMENTS (newdecl); parm;
2011 parm = TREE_CHAIN (parm))
2012 DECL_CONTEXT (parm) = olddecl;
2016 SET_DECL_LANGUAGE (olddecl, DECL_LANGUAGE (newdecl));
2017 COPY_DECL_ASSEMBLER_NAME (newdecl, olddecl);
2018 COPY_DECL_RTL (newdecl, olddecl);
2020 if (! types_match || new_defines_function)
2022 /* These need to be copied so that the names are available.
2023 Note that if the types do match, we'll preserve inline
2024 info and other bits, but if not, we won't. */
2025 DECL_ARGUMENTS (olddecl) = DECL_ARGUMENTS (newdecl);
2026 DECL_RESULT (olddecl) = DECL_RESULT (newdecl);
2028 if (new_defines_function)
2029 /* If defining a function declared with other language
2030 linkage, use the previously declared language linkage. */
2031 SET_DECL_LANGUAGE (newdecl, DECL_LANGUAGE (olddecl));
2032 else if (types_match)
2034 /* If redeclaring a builtin function, and not a definition,
2035 it stays built in. */
2036 if (DECL_BUILT_IN (olddecl))
2038 DECL_BUILT_IN_CLASS (newdecl) = DECL_BUILT_IN_CLASS (olddecl);
2039 DECL_FUNCTION_CODE (newdecl) = DECL_FUNCTION_CODE (olddecl);
2040 /* If we're keeping the built-in definition, keep the rtl,
2041 regardless of declaration matches. */
2042 COPY_DECL_RTL (olddecl, newdecl);
2045 DECL_RESULT (newdecl) = DECL_RESULT (olddecl);
2046 /* Don't clear out the arguments if we're just redeclaring a
2048 if (DECL_ARGUMENTS (olddecl))
2049 DECL_ARGUMENTS (newdecl) = DECL_ARGUMENTS (olddecl);
2052 else if (TREE_CODE (newdecl) == NAMESPACE_DECL)
2053 NAMESPACE_LEVEL (newdecl) = NAMESPACE_LEVEL (olddecl);
2055 /* Now preserve various other info from the definition. */
2056 TREE_ADDRESSABLE (newdecl) = TREE_ADDRESSABLE (olddecl);
2057 TREE_ASM_WRITTEN (newdecl) = TREE_ASM_WRITTEN (olddecl);
2058 DECL_COMMON (newdecl) = DECL_COMMON (olddecl);
2059 COPY_DECL_ASSEMBLER_NAME (olddecl, newdecl);
2061 /* Warn about conflicting visibility specifications. */
2062 if (DECL_VISIBILITY_SPECIFIED (olddecl)
2063 && DECL_VISIBILITY_SPECIFIED (newdecl)
2064 && DECL_VISIBILITY (newdecl) != DECL_VISIBILITY (olddecl))
2066 warning_at (input_location, OPT_Wattributes,
2067 "%q+D: visibility attribute ignored because it", newdecl);
2068 warning_at (DECL_SOURCE_LOCATION (olddecl), OPT_Wattributes,
2069 "conflicts with previous declaration here");
2071 /* Choose the declaration which specified visibility. */
2072 if (DECL_VISIBILITY_SPECIFIED (olddecl))
2074 DECL_VISIBILITY (newdecl) = DECL_VISIBILITY (olddecl);
2075 DECL_VISIBILITY_SPECIFIED (newdecl) = 1;
2077 /* Init priority used to be merged from newdecl to olddecl by the memcpy,
2078 so keep this behavior. */
2079 if (TREE_CODE (newdecl) == VAR_DECL && DECL_HAS_INIT_PRIORITY_P (newdecl))
2081 SET_DECL_INIT_PRIORITY (olddecl, DECL_INIT_PRIORITY (newdecl));
2082 DECL_HAS_INIT_PRIORITY_P (olddecl) = 1;
2085 /* The DECL_LANG_SPECIFIC information in OLDDECL will be replaced
2086 with that from NEWDECL below. */
2087 if (DECL_LANG_SPECIFIC (olddecl))
2089 gcc_assert (DECL_LANG_SPECIFIC (olddecl)
2090 != DECL_LANG_SPECIFIC (newdecl));
2091 ggc_free (DECL_LANG_SPECIFIC (olddecl));
2094 /* Merge the USED information. */
2095 if (TREE_USED (olddecl))
2096 TREE_USED (newdecl) = 1;
2097 else if (TREE_USED (newdecl))
2098 TREE_USED (olddecl) = 1;
2099 if (DECL_PRESERVE_P (olddecl))
2100 DECL_PRESERVE_P (newdecl) = 1;
2101 else if (DECL_PRESERVE_P (newdecl))
2102 DECL_PRESERVE_P (olddecl) = 1;
2104 if (TREE_CODE (newdecl) == FUNCTION_DECL)
2108 function_size = sizeof (struct tree_decl_common);
2110 memcpy ((char *) olddecl + sizeof (struct tree_common),
2111 (char *) newdecl + sizeof (struct tree_common),
2112 function_size - sizeof (struct tree_common));
2114 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
2115 (char *) newdecl + sizeof (struct tree_decl_common),
2116 sizeof (struct tree_function_decl) - sizeof (struct tree_decl_common));
2117 if (new_template_info)
2118 /* If newdecl is a template instantiation, it is possible that
2119 the following sequence of events has occurred:
2121 o A friend function was declared in a class template. The
2122 class template was instantiated.
2124 o The instantiation of the friend declaration was
2125 recorded on the instantiation list, and is newdecl.
2127 o Later, however, instantiate_class_template called pushdecl
2128 on the newdecl to perform name injection. But, pushdecl in
2129 turn called duplicate_decls when it discovered that another
2130 declaration of a global function with the same name already
2133 o Here, in duplicate_decls, we decided to clobber newdecl.
2135 If we're going to do that, we'd better make sure that
2136 olddecl, and not newdecl, is on the list of
2137 instantiations so that if we try to do the instantiation
2138 again we won't get the clobbered declaration. */
2139 reregister_specialization (newdecl,
2145 size_t size = tree_code_size (TREE_CODE (olddecl));
2146 memcpy ((char *) olddecl + sizeof (struct tree_common),
2147 (char *) newdecl + sizeof (struct tree_common),
2148 sizeof (struct tree_decl_common) - sizeof (struct tree_common));
2149 switch (TREE_CODE (olddecl))
2159 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
2160 (char *) newdecl + sizeof (struct tree_decl_common),
2161 size - sizeof (struct tree_decl_common)
2162 + TREE_CODE_LENGTH (TREE_CODE (newdecl)) * sizeof (char *));
2166 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
2167 (char *) newdecl + sizeof (struct tree_decl_common),
2168 sizeof (struct tree_decl_non_common) - sizeof (struct tree_decl_common)
2169 + TREE_CODE_LENGTH (TREE_CODE (newdecl)) * sizeof (char *));
2173 DECL_UID (olddecl) = olddecl_uid;
2175 DECL_FRIEND_P (olddecl) = 1;
2178 DECL_ANTICIPATED (olddecl) = 1;
2179 DECL_HIDDEN_FRIEND_P (olddecl) = 1;
2182 /* NEWDECL contains the merged attribute lists.
2183 Update OLDDECL to be the same. */
2184 DECL_ATTRIBUTES (olddecl) = DECL_ATTRIBUTES (newdecl);
2186 /* If OLDDECL had its DECL_RTL instantiated, re-invoke make_decl_rtl
2187 so that encode_section_info has a chance to look at the new decl
2188 flags and attributes. */
2189 if (DECL_RTL_SET_P (olddecl)
2190 && (TREE_CODE (olddecl) == FUNCTION_DECL
2191 || (TREE_CODE (olddecl) == VAR_DECL
2192 && TREE_STATIC (olddecl))))
2193 make_decl_rtl (olddecl);
2195 /* The NEWDECL will no longer be needed. Because every out-of-class
2196 declaration of a member results in a call to duplicate_decls,
2197 freeing these nodes represents in a significant savings. */
2203 /* Return zero if the declaration NEWDECL is valid
2204 when the declaration OLDDECL (assumed to be for the same name)
2205 has already been seen.
2206 Otherwise return an error message format string with a %s
2207 where the identifier should go. */
2210 redeclaration_error_message (tree newdecl, tree olddecl)
2212 if (TREE_CODE (newdecl) == TYPE_DECL)
2214 /* Because C++ can put things into name space for free,
2215 constructs like "typedef struct foo { ... } foo"
2216 would look like an erroneous redeclaration. */
2217 if (same_type_p (TREE_TYPE (newdecl), TREE_TYPE (olddecl)))
2220 return G_("redefinition of %q#D");
2222 else if (TREE_CODE (newdecl) == FUNCTION_DECL)
2224 /* If this is a pure function, its olddecl will actually be
2225 the original initialization to `0' (which we force to call
2226 abort()). Don't complain about redefinition in this case. */
2227 if (DECL_LANG_SPECIFIC (olddecl) && DECL_PURE_VIRTUAL_P (olddecl)
2228 && DECL_INITIAL (olddecl) == NULL_TREE)
2231 /* If both functions come from different namespaces, this is not
2232 a redeclaration - this is a conflict with a used function. */
2233 if (DECL_NAMESPACE_SCOPE_P (olddecl)
2234 && DECL_CONTEXT (olddecl) != DECL_CONTEXT (newdecl)
2235 && ! decls_match (olddecl, newdecl))
2236 return G_("%qD conflicts with used function");
2238 /* We'll complain about linkage mismatches in
2239 warn_extern_redeclared_static. */
2241 /* Defining the same name twice is no good. */
2242 if (DECL_INITIAL (olddecl) != NULL_TREE
2243 && DECL_INITIAL (newdecl) != NULL_TREE)
2245 if (DECL_NAME (olddecl) == NULL_TREE)
2246 return G_("%q#D not declared in class");
2247 else if (!GNU_INLINE_P (olddecl)
2248 || GNU_INLINE_P (newdecl))
2249 return G_("redefinition of %q#D");
2252 if (DECL_DECLARED_INLINE_P (olddecl) && DECL_DECLARED_INLINE_P (newdecl))
2254 bool olda = GNU_INLINE_P (olddecl);
2255 bool newa = GNU_INLINE_P (newdecl);
2260 return G_("%q+D redeclared inline with "
2261 "%<gnu_inline%> attribute");
2263 return G_("%q+D redeclared inline without "
2264 "%<gnu_inline%> attribute");
2270 else if (TREE_CODE (newdecl) == TEMPLATE_DECL)
2274 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
2276 if (COMPLETE_TYPE_P (TREE_TYPE (newdecl))
2277 && COMPLETE_TYPE_P (TREE_TYPE (olddecl)))
2278 return G_("redefinition of %q#D");
2282 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) != FUNCTION_DECL
2283 || (DECL_TEMPLATE_RESULT (newdecl)
2284 == DECL_TEMPLATE_RESULT (olddecl)))
2287 nt = DECL_TEMPLATE_RESULT (newdecl);
2288 if (DECL_TEMPLATE_INFO (nt))
2289 nt = DECL_TEMPLATE_RESULT (template_for_substitution (nt));
2290 ot = DECL_TEMPLATE_RESULT (olddecl);
2291 if (DECL_TEMPLATE_INFO (ot))
2292 ot = DECL_TEMPLATE_RESULT (template_for_substitution (ot));
2293 if (DECL_INITIAL (nt) && DECL_INITIAL (ot)
2294 && (!GNU_INLINE_P (ot) || GNU_INLINE_P (nt)))
2295 return G_("redefinition of %q#D");
2297 if (DECL_DECLARED_INLINE_P (ot) && DECL_DECLARED_INLINE_P (nt))
2299 bool olda = GNU_INLINE_P (ot);
2300 bool newa = GNU_INLINE_P (nt);
2305 return G_("%q+D redeclared inline with "
2306 "%<gnu_inline%> attribute");
2308 return G_("%q+D redeclared inline without "
2309 "%<gnu_inline%> attribute");
2313 /* Core issue #226 (C++0x):
2315 If a friend function template declaration specifies a
2316 default template-argument, that declaration shall be a
2317 definition and shall be the only declaration of the
2318 function template in the translation unit. */
2319 if ((cxx_dialect != cxx98)
2320 && TREE_CODE (ot) == FUNCTION_DECL && DECL_FRIEND_P (ot)
2321 && !check_default_tmpl_args (nt, DECL_TEMPLATE_PARMS (newdecl),
2322 /*is_primary=*/1, /*is_partial=*/0,
2323 /*is_friend_decl=*/2))
2324 return G_("redeclaration of friend %q#D "
2325 "may not have default template arguments");
2329 else if (TREE_CODE (newdecl) == VAR_DECL
2330 && DECL_THREAD_LOCAL_P (newdecl) != DECL_THREAD_LOCAL_P (olddecl)
2331 && (! DECL_LANG_SPECIFIC (olddecl)
2332 || ! CP_DECL_THREADPRIVATE_P (olddecl)
2333 || DECL_THREAD_LOCAL_P (newdecl)))
2335 /* Only variables can be thread-local, and all declarations must
2336 agree on this property. */
2337 if (DECL_THREAD_LOCAL_P (newdecl))
2338 return G_("thread-local declaration of %q#D follows "
2339 "non-thread-local declaration");
2341 return G_("non-thread-local declaration of %q#D follows "
2342 "thread-local declaration");
2344 else if (toplevel_bindings_p () || DECL_NAMESPACE_SCOPE_P (newdecl))
2346 /* The objects have been declared at namespace scope. If either
2347 is a member of an anonymous union, then this is an invalid
2348 redeclaration. For example:
2354 if ((TREE_CODE (newdecl) == VAR_DECL && DECL_ANON_UNION_VAR_P (newdecl))
2355 || (TREE_CODE (olddecl) == VAR_DECL && DECL_ANON_UNION_VAR_P (olddecl)))
2356 return G_("redeclaration of %q#D");
2357 /* If at least one declaration is a reference, there is no
2358 conflict. For example:
2364 if (DECL_EXTERNAL (newdecl) || DECL_EXTERNAL (olddecl))
2366 /* Reject two definitions. */
2367 return G_("redefinition of %q#D");
2371 /* Objects declared with block scope: */
2372 /* Reject two definitions, and reject a definition
2373 together with an external reference. */
2374 if (!(DECL_EXTERNAL (newdecl) && DECL_EXTERNAL (olddecl)))
2375 return G_("redeclaration of %q#D");
2380 /* Hash and equality functions for the named_label table. */
2383 named_label_entry_hash (const void *data)
2385 const struct named_label_entry *ent = (const struct named_label_entry *) data;
2386 return DECL_UID (ent->label_decl);
2390 named_label_entry_eq (const void *a, const void *b)
2392 const struct named_label_entry *ent_a = (const struct named_label_entry *) a;
2393 const struct named_label_entry *ent_b = (const struct named_label_entry *) b;
2394 return ent_a->label_decl == ent_b->label_decl;
2397 /* Create a new label, named ID. */
2400 make_label_decl (tree id, int local_p)
2402 struct named_label_entry *ent;
2406 decl = build_decl (input_location, LABEL_DECL, id, void_type_node);
2408 DECL_CONTEXT (decl) = current_function_decl;
2409 DECL_MODE (decl) = VOIDmode;
2410 C_DECLARED_LABEL_FLAG (decl) = local_p;
2412 /* Say where one reference is to the label, for the sake of the
2413 error if it is not defined. */
2414 DECL_SOURCE_LOCATION (decl) = input_location;
2416 /* Record the fact that this identifier is bound to this label. */
2417 SET_IDENTIFIER_LABEL_VALUE (id, decl);
2419 /* Create the label htab for the function on demand. */
2421 named_labels = htab_create_ggc (13, named_label_entry_hash,
2422 named_label_entry_eq, NULL);
2424 /* Record this label on the list of labels used in this function.
2425 We do this before calling make_label_decl so that we get the
2426 IDENTIFIER_LABEL_VALUE before the new label is declared. */
2427 ent = GGC_CNEW (struct named_label_entry);
2428 ent->label_decl = decl;
2430 slot = htab_find_slot (named_labels, ent, INSERT);
2431 gcc_assert (*slot == NULL);
2437 /* Look for a label named ID in the current function. If one cannot
2438 be found, create one. (We keep track of used, but undefined,
2439 labels, and complain about them at the end of a function.) */
2442 lookup_label (tree id)
2446 timevar_push (TV_NAME_LOOKUP);
2447 /* You can't use labels at global scope. */
2448 if (current_function_decl == NULL_TREE)
2450 error ("label %qE referenced outside of any function", id);
2451 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, NULL_TREE);
2454 /* See if we've already got this label. */
2455 decl = IDENTIFIER_LABEL_VALUE (id);
2456 if (decl != NULL_TREE && DECL_CONTEXT (decl) == current_function_decl)
2457 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2459 decl = make_label_decl (id, /*local_p=*/0);
2460 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2463 /* Declare a local label named ID. */
2466 declare_local_label (tree id)
2470 /* Add a new entry to the SHADOWED_LABELS list so that when we leave
2471 this scope we can restore the old value of IDENTIFIER_TYPE_VALUE. */
2472 shadow = tree_cons (IDENTIFIER_LABEL_VALUE (id), NULL_TREE,
2473 current_binding_level->shadowed_labels);
2474 current_binding_level->shadowed_labels = shadow;
2476 decl = make_label_decl (id, /*local_p=*/1);
2477 TREE_VALUE (shadow) = decl;
2482 /* Returns nonzero if it is ill-formed to jump past the declaration of
2483 DECL. Returns 2 if it's also a real problem. */
2486 decl_jump_unsafe (tree decl)
2488 /* [stmt.dcl]/3: A program that jumps from a point where a local variable
2489 with automatic storage duration is not in scope to a point where it is
2490 in scope is ill-formed unless the variable has scalar type, class type
2491 with a trivial default constructor and a trivial destructor, a
2492 cv-qualified version of one of these types, or an array of one of the
2493 preceding types and is declared without an initializer (8.5). */
2494 tree type = TREE_TYPE (decl);
2496 if (TREE_CODE (decl) != VAR_DECL || TREE_STATIC (decl)
2497 || type == error_mark_node)
2500 type = strip_array_types (type);
2502 if (type_has_nontrivial_default_init (TREE_TYPE (decl))
2503 || DECL_NONTRIVIALLY_INITIALIZED_P (decl))
2506 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
2512 /* A subroutine of check_previous_goto_1 to identify a branch to the user. */
2515 identify_goto (tree decl, const location_t *locus)
2518 permerror (input_location, "jump to label %qD", decl);
2520 permerror (input_location, "jump to case label");
2522 permerror (*locus, " from here");
2525 /* Check that a single previously seen jump to a newly defined label
2526 is OK. DECL is the LABEL_DECL or 0; LEVEL is the binding_level for
2527 the jump context; NAMES are the names in scope in LEVEL at the jump
2528 context; LOCUS is the source position of the jump or 0. Returns
2529 true if all is well. */
2532 check_previous_goto_1 (tree decl, struct cp_binding_level* level, tree names,
2533 bool exited_omp, const location_t *locus)
2535 struct cp_binding_level *b;
2536 bool identified = false, saw_eh = false, saw_omp = false;
2540 identify_goto (decl, locus);
2541 error (" exits OpenMP structured block");
2542 identified = saw_omp = true;
2545 for (b = current_binding_level; b ; b = b->level_chain)
2547 tree new_decls, old_decls = (b == level ? names : NULL_TREE);
2549 for (new_decls = b->names; new_decls != old_decls;
2550 new_decls = TREE_CHAIN (new_decls))
2552 int problem = decl_jump_unsafe (new_decls);
2558 identify_goto (decl, locus);
2562 error (" crosses initialization of %q+#D", new_decls);
2564 permerror (input_location, " enters scope of %q+#D which has "
2565 "non-trivial destructor", new_decls);
2570 if ((b->kind == sk_try || b->kind == sk_catch) && !saw_eh)
2574 identify_goto (decl, locus);
2577 if (b->kind == sk_try)
2578 error (" enters try block");
2580 error (" enters catch block");
2583 if (b->kind == sk_omp && !saw_omp)
2587 identify_goto (decl, locus);
2590 error (" enters OpenMP structured block");
2599 check_previous_goto (tree decl, struct named_label_use_entry *use)
2601 check_previous_goto_1 (decl, use->binding_level,
2602 use->names_in_scope, use->in_omp_scope,
2603 &use->o_goto_locus);
2607 check_switch_goto (struct cp_binding_level* level)
2609 return check_previous_goto_1 (NULL_TREE, level, level->names, false, NULL);
2612 /* Check that a new jump to a label DECL is OK. Called by
2613 finish_goto_stmt. */
2616 check_goto (tree decl)
2618 struct named_label_entry *ent, dummy;
2619 bool saw_catch = false, identified = false;
2622 /* We can't know where a computed goto is jumping.
2623 So we assume that it's OK. */
2624 if (TREE_CODE (decl) != LABEL_DECL)
2627 /* We didn't record any information about this label when we created it,
2628 and there's not much point since it's trivial to analyze as a return. */
2629 if (decl == cdtor_label)
2632 dummy.label_decl = decl;
2633 ent = (struct named_label_entry *) htab_find (named_labels, &dummy);
2634 gcc_assert (ent != NULL);
2636 /* If the label hasn't been defined yet, defer checking. */
2637 if (! DECL_INITIAL (decl))
2639 struct named_label_use_entry *new_use;
2641 /* Don't bother creating another use if the last goto had the
2642 same data, and will therefore create the same set of errors. */
2644 && ent->uses->names_in_scope == current_binding_level->names)
2647 new_use = GGC_NEW (struct named_label_use_entry);
2648 new_use->binding_level = current_binding_level;
2649 new_use->names_in_scope = current_binding_level->names;
2650 new_use->o_goto_locus = input_location;
2651 new_use->in_omp_scope = false;
2653 new_use->next = ent->uses;
2654 ent->uses = new_use;
2658 if (ent->in_try_scope || ent->in_catch_scope
2659 || ent->in_omp_scope || ent->bad_decls)
2661 permerror (input_location, "jump to label %q+D", decl);
2662 permerror (input_location, " from here");
2666 for (bad = ent->bad_decls; bad; bad = TREE_CHAIN (bad))
2668 tree b = TREE_VALUE (bad);
2669 int u = decl_jump_unsafe (b);
2671 if (u > 1 && DECL_ARTIFICIAL (b))
2673 /* Can't skip init of __exception_info. */
2674 error_at (DECL_SOURCE_LOCATION (b), " enters catch block");
2678 error (" skips initialization of %q+#D", b);
2680 permerror (input_location, " enters scope of %q+#D which has "
2681 "non-trivial destructor", b);
2684 if (ent->in_try_scope)
2685 error (" enters try block");
2686 else if (ent->in_catch_scope && !saw_catch)
2687 error (" enters catch block");
2689 if (ent->in_omp_scope)
2690 error (" enters OpenMP structured block");
2691 else if (flag_openmp)
2693 struct cp_binding_level *b;
2694 for (b = current_binding_level; b ; b = b->level_chain)
2696 if (b == ent->binding_level)
2698 if (b->kind == sk_omp)
2702 permerror (input_location, "jump to label %q+D", decl);
2703 permerror (input_location, " from here");
2706 error (" exits OpenMP structured block");
2713 /* Check that a return is ok wrt OpenMP structured blocks.
2714 Called by finish_return_stmt. Returns true if all is well. */
2717 check_omp_return (void)
2719 struct cp_binding_level *b;
2720 for (b = current_binding_level; b ; b = b->level_chain)
2721 if (b->kind == sk_omp)
2723 error ("invalid exit from OpenMP structured block");
2729 /* Define a label, specifying the location in the source file.
2730 Return the LABEL_DECL node for the label. */
2733 define_label (location_t location, tree name)
2735 struct named_label_entry *ent, dummy;
2736 struct cp_binding_level *p;
2739 timevar_push (TV_NAME_LOOKUP);
2741 decl = lookup_label (name);
2743 dummy.label_decl = decl;
2744 ent = (struct named_label_entry *) htab_find (named_labels, &dummy);
2745 gcc_assert (ent != NULL);
2747 /* After labels, make any new cleanups in the function go into their
2748 own new (temporary) binding contour. */
2749 for (p = current_binding_level;
2750 p->kind != sk_function_parms;
2752 p->more_cleanups_ok = 0;
2754 if (name == get_identifier ("wchar_t"))
2755 permerror (input_location, "label named wchar_t");
2757 if (DECL_INITIAL (decl) != NULL_TREE)
2759 error ("duplicate label %qD", decl);
2760 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
2764 struct named_label_use_entry *use;
2766 /* Mark label as having been defined. */
2767 DECL_INITIAL (decl) = error_mark_node;
2768 /* Say where in the source. */
2769 DECL_SOURCE_LOCATION (decl) = location;
2771 ent->binding_level = current_binding_level;
2772 ent->names_in_scope = current_binding_level->names;
2774 for (use = ent->uses; use ; use = use->next)
2775 check_previous_goto (decl, use);
2779 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2784 struct cp_binding_level *level;
2785 struct cp_switch *next;
2786 /* The SWITCH_STMT being built. */
2788 /* A splay-tree mapping the low element of a case range to the high
2789 element, or NULL_TREE if there is no high element. Used to
2790 determine whether or not a new case label duplicates an old case
2791 label. We need a tree, rather than simply a hash table, because
2792 of the GNU case range extension. */
2796 /* A stack of the currently active switch statements. The innermost
2797 switch statement is on the top of the stack. There is no need to
2798 mark the stack for garbage collection because it is only active
2799 during the processing of the body of a function, and we never
2800 collect at that point. */
2802 static struct cp_switch *switch_stack;
2804 /* Called right after a switch-statement condition is parsed.
2805 SWITCH_STMT is the switch statement being parsed. */
2808 push_switch (tree switch_stmt)
2810 struct cp_switch *p = XNEW (struct cp_switch);
2811 p->level = current_binding_level;
2812 p->next = switch_stack;
2813 p->switch_stmt = switch_stmt;
2814 p->cases = splay_tree_new (case_compare, NULL, NULL);
2821 struct cp_switch *cs = switch_stack;
2822 location_t switch_location;
2824 /* Emit warnings as needed. */
2825 if (EXPR_HAS_LOCATION (cs->switch_stmt))
2826 switch_location = EXPR_LOCATION (cs->switch_stmt);
2828 switch_location = input_location;
2829 if (!processing_template_decl)
2830 c_do_switch_warnings (cs->cases, switch_location,
2831 SWITCH_STMT_TYPE (cs->switch_stmt),
2832 SWITCH_STMT_COND (cs->switch_stmt));
2834 splay_tree_delete (cs->cases);
2835 switch_stack = switch_stack->next;
2839 /* Note that we've seen a definition of a case label, and complain if this
2840 is a bad place for one. */
2843 finish_case_label (location_t loc, tree low_value, tree high_value)
2846 struct cp_binding_level *p;
2848 if (processing_template_decl)
2852 /* For templates, just add the case label; we'll do semantic
2853 analysis at instantiation-time. */
2854 label = build_decl (loc, LABEL_DECL, NULL_TREE, NULL_TREE);
2855 return add_stmt (build_case_label (loc, low_value, high_value, label));
2858 /* Find the condition on which this switch statement depends. */
2859 cond = SWITCH_STMT_COND (switch_stack->switch_stmt);
2860 if (cond && TREE_CODE (cond) == TREE_LIST)
2861 cond = TREE_VALUE (cond);
2863 if (!check_switch_goto (switch_stack->level))
2864 return error_mark_node;
2866 r = c_add_case_label (loc, switch_stack->cases, cond,
2867 SWITCH_STMT_TYPE (switch_stack->switch_stmt),
2868 low_value, high_value);
2870 /* After labels, make any new cleanups in the function go into their
2871 own new (temporary) binding contour. */
2872 for (p = current_binding_level;
2873 p->kind != sk_function_parms;
2875 p->more_cleanups_ok = 0;
2880 /* Hash a TYPENAME_TYPE. K is really of type `tree'. */
2883 typename_hash (const void* k)
2886 const_tree const t = (const_tree) k;
2888 hash = (htab_hash_pointer (TYPE_CONTEXT (t))
2889 ^ htab_hash_pointer (DECL_NAME (TYPE_NAME (t))));
2894 typedef struct typename_info {
2902 /* Compare two TYPENAME_TYPEs. K1 is really of type `tree', K2 is
2903 really of type `typename_info*' */
2906 typename_compare (const void * k1, const void * k2)
2908 const_tree const t1 = (const_tree) k1;
2909 const typename_info *const t2 = (const typename_info *) k2;
2911 return (DECL_NAME (TYPE_NAME (t1)) == t2->name
2912 && TYPE_CONTEXT (t1) == t2->scope
2913 && TYPENAME_TYPE_FULLNAME (t1) == t2->template_id
2914 && TYPENAME_IS_ENUM_P (t1) == t2->enum_p
2915 && TYPENAME_IS_CLASS_P (t1) == t2->class_p);
2918 /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
2919 the type of `T', NAME is the IDENTIFIER_NODE for `t'.
2921 Returns the new TYPENAME_TYPE. */
2923 static GTY ((param_is (union tree_node))) htab_t typename_htab;
2926 build_typename_type (tree context, tree name, tree fullname,
2927 enum tag_types tag_type)
2935 if (typename_htab == NULL)
2936 typename_htab = htab_create_ggc (61, &typename_hash,
2937 &typename_compare, NULL);
2939 ti.scope = FROB_CONTEXT (context);
2941 ti.template_id = fullname;
2942 ti.enum_p = tag_type == enum_type;
2943 ti.class_p = (tag_type == class_type
2944 || tag_type == record_type
2945 || tag_type == union_type);
2946 hash = (htab_hash_pointer (ti.scope)
2947 ^ htab_hash_pointer (ti.name));
2949 /* See if we already have this type. */
2950 e = htab_find_slot_with_hash (typename_htab, &ti, hash, INSERT);
2955 /* Build the TYPENAME_TYPE. */
2956 t = cxx_make_type (TYPENAME_TYPE);
2957 TYPE_CONTEXT (t) = ti.scope;
2958 TYPENAME_TYPE_FULLNAME (t) = ti.template_id;
2959 TYPENAME_IS_ENUM_P (t) = ti.enum_p;
2960 TYPENAME_IS_CLASS_P (t) = ti.class_p;
2962 /* Build the corresponding TYPE_DECL. */
2963 d = build_decl (input_location, TYPE_DECL, name, t);
2964 TYPE_NAME (TREE_TYPE (d)) = d;
2965 TYPE_STUB_DECL (TREE_TYPE (d)) = d;
2966 DECL_CONTEXT (d) = FROB_CONTEXT (context);
2967 DECL_ARTIFICIAL (d) = 1;
2969 /* Store it in the hash table. */
2972 /* TYPENAME_TYPEs must always be compared structurally, because
2973 they may or may not resolve down to another type depending on
2974 the currently open classes. */
2975 SET_TYPE_STRUCTURAL_EQUALITY (t);
2981 /* Resolve `typename CONTEXT::NAME'. TAG_TYPE indicates the tag
2982 provided to name the type. Returns an appropriate type, unless an
2983 error occurs, in which case error_mark_node is returned. If we
2984 locate a non-artificial TYPE_DECL and TF_KEEP_TYPE_DECL is set, we
2985 return that, rather than the _TYPE it corresponds to, in other
2986 cases we look through the type decl. If TF_ERROR is set, complain
2987 about errors, otherwise be quiet. */
2990 make_typename_type (tree context, tree name, enum tag_types tag_type,
2991 tsubst_flags_t complain)
2997 if (name == error_mark_node
2998 || context == NULL_TREE
2999 || context == error_mark_node)
3000 return error_mark_node;
3004 if (!(TYPE_LANG_SPECIFIC (name)
3005 && (CLASSTYPE_IS_TEMPLATE (name)
3006 || CLASSTYPE_USE_TEMPLATE (name))))
3007 name = TYPE_IDENTIFIER (name);
3009 /* Create a TEMPLATE_ID_EXPR for the type. */
3010 name = build_nt (TEMPLATE_ID_EXPR,
3011 CLASSTYPE_TI_TEMPLATE (name),
3012 CLASSTYPE_TI_ARGS (name));
3014 else if (TREE_CODE (name) == TYPE_DECL)
3015 name = DECL_NAME (name);
3019 if (TREE_CODE (name) == TEMPLATE_ID_EXPR)
3021 name = TREE_OPERAND (name, 0);
3022 if (TREE_CODE (name) == TEMPLATE_DECL)
3023 name = TREE_OPERAND (fullname, 0) = DECL_NAME (name);
3024 else if (TREE_CODE (name) == OVERLOAD)
3026 error ("%qD is not a type", name);
3027 return error_mark_node;
3030 if (TREE_CODE (name) == TEMPLATE_DECL)
3032 error ("%qD used without template parameters", name);
3033 return error_mark_node;
3035 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
3036 gcc_assert (TYPE_P (context));
3038 if (!MAYBE_CLASS_TYPE_P (context))
3040 if (complain & tf_error)
3041 error ("%q#T is not a class", context);
3042 return error_mark_node;
3045 /* When the CONTEXT is a dependent type, NAME could refer to a
3046 dependent base class of CONTEXT. But look inside it anyway
3047 if CONTEXT is a currently open scope, in case it refers to a
3048 member of the current instantiation or a non-dependent base;
3049 lookup will stop when we hit a dependent base. */
3050 if (!dependent_scope_p (context))
3051 /* We should only set WANT_TYPE when we're a nested typename type.
3052 Then we can give better diagnostics if we find a non-type. */
3053 t = lookup_field (context, name, 2, /*want_type=*/true);
3057 if ((!t || TREE_CODE (t) == TREE_LIST) && dependent_type_p (context))
3058 return build_typename_type (context, name, fullname, tag_type);
3060 want_template = TREE_CODE (fullname) == TEMPLATE_ID_EXPR;
3064 if (complain & tf_error)
3065 error (want_template ? "no class template named %q#T in %q#T"
3066 : "no type named %q#T in %q#T", name, context);
3067 return error_mark_node;
3070 /* Pull out the template from an injected-class-name (or multiple). */
3072 t = maybe_get_template_decl_from_type_decl (t);
3074 if (TREE_CODE (t) == TREE_LIST)
3076 if (complain & tf_error)
3078 error ("lookup of %qT in %qT is ambiguous", name, context);
3079 print_candidates (t);
3081 return error_mark_node;
3084 if (want_template && !DECL_CLASS_TEMPLATE_P (t))
3086 if (complain & tf_error)
3087 error ("%<typename %T::%D%> names %q#T, which is not a class template",
3089 return error_mark_node;
3091 if (!want_template && TREE_CODE (t) != TYPE_DECL)
3093 if (complain & tf_error)
3094 error ("%<typename %T::%D%> names %q#T, which is not a type",
3096 return error_mark_node;
3099 if (complain & tf_error)
3100 perform_or_defer_access_check (TYPE_BINFO (context), t, t);
3102 /* If we are currently parsing a template and if T is a typedef accessed
3103 through CONTEXT then we need to remember and check access of T at
3104 template instantiation time. */
3105 add_typedef_to_current_template_for_access_check (t, context, input_location);
3108 return lookup_template_class (t, TREE_OPERAND (fullname, 1),
3110 /*entering_scope=*/0,
3111 tf_warning_or_error | tf_user);
3113 if (DECL_ARTIFICIAL (t) || !(complain & tf_keep_type_decl))
3119 /* Resolve `CONTEXT::template NAME'. Returns a TEMPLATE_DECL if the name
3120 can be resolved or an UNBOUND_CLASS_TEMPLATE, unless an error occurs,
3121 in which case error_mark_node is returned.
3123 If PARM_LIST is non-NULL, also make sure that the template parameter
3124 list of TEMPLATE_DECL matches.
3126 If COMPLAIN zero, don't complain about any errors that occur. */
3129 make_unbound_class_template (tree context, tree name, tree parm_list,
3130 tsubst_flags_t complain)
3136 name = TYPE_IDENTIFIER (name);
3137 else if (DECL_P (name))
3138 name = DECL_NAME (name);
3139 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
3141 if (!dependent_type_p (context)
3142 || currently_open_class (context))
3144 tree tmpl = NULL_TREE;
3146 if (MAYBE_CLASS_TYPE_P (context))
3147 tmpl = lookup_field (context, name, 0, false);
3149 if (!tmpl || !DECL_CLASS_TEMPLATE_P (tmpl))
3151 if (complain & tf_error)
3152 error ("no class template named %q#T in %q#T", name, context);
3153 return error_mark_node;
3157 && !comp_template_parms (DECL_TEMPLATE_PARMS (tmpl), parm_list))
3159 if (complain & tf_error)
3161 error ("template parameters do not match template");
3162 error ("%q+D declared here", tmpl);
3164 return error_mark_node;
3167 if (complain & tf_error)
3168 perform_or_defer_access_check (TYPE_BINFO (context), tmpl, tmpl);
3173 /* Build the UNBOUND_CLASS_TEMPLATE. */
3174 t = cxx_make_type (UNBOUND_CLASS_TEMPLATE);
3175 TYPE_CONTEXT (t) = FROB_CONTEXT (context);
3176 TREE_TYPE (t) = NULL_TREE;
3177 SET_TYPE_STRUCTURAL_EQUALITY (t);
3179 /* Build the corresponding TEMPLATE_DECL. */
3180 d = build_decl (input_location, TEMPLATE_DECL, name, t);
3181 TYPE_NAME (TREE_TYPE (d)) = d;
3182 TYPE_STUB_DECL (TREE_TYPE (d)) = d;
3183 DECL_CONTEXT (d) = FROB_CONTEXT (context);
3184 DECL_ARTIFICIAL (d) = 1;
3185 DECL_TEMPLATE_PARMS (d) = parm_list;
3192 /* Push the declarations of builtin types into the namespace.
3193 RID_INDEX is the index of the builtin type in the array
3194 RID_POINTERS. NAME is the name used when looking up the builtin
3195 type. TYPE is the _TYPE node for the builtin type. */
3198 record_builtin_type (enum rid rid_index,
3202 tree rname = NULL_TREE, tname = NULL_TREE;
3203 tree tdecl = NULL_TREE;
3205 if ((int) rid_index < (int) RID_MAX)
3206 rname = ridpointers[(int) rid_index];
3208 tname = get_identifier (name);
3210 /* The calls to SET_IDENTIFIER_GLOBAL_VALUE below should be
3211 eliminated. Built-in types should not be looked up name; their
3212 names are keywords that the parser can recognize. However, there
3213 is code in c-common.c that uses identifier_global_value to look
3214 up built-in types by name. */
3217 tdecl = build_decl (BUILTINS_LOCATION, TYPE_DECL, tname, type);
3218 DECL_ARTIFICIAL (tdecl) = 1;
3219 SET_IDENTIFIER_GLOBAL_VALUE (tname, tdecl);
3225 tdecl = build_decl (BUILTINS_LOCATION, TYPE_DECL, rname, type);
3226 DECL_ARTIFICIAL (tdecl) = 1;
3228 SET_IDENTIFIER_GLOBAL_VALUE (rname, tdecl);
3231 if (!TYPE_NAME (type))
3232 TYPE_NAME (type) = tdecl;
3235 debug_hooks->type_decl (tdecl, 0);
3238 /* Record one of the standard Java types.
3239 * Declare it as having the given NAME.
3240 * If SIZE > 0, it is the size of one of the integral types;
3241 * otherwise it is the negative of the size of one of the other types. */
3244 record_builtin_java_type (const char* name, int size)
3248 type = build_nonstandard_integer_type (size, 0);
3249 else if (size > -32)
3252 /* "__java_char" or ""__java_boolean". */
3253 type = build_nonstandard_integer_type (-size, 1);
3254 /* Get the signed type cached and attached to the unsigned type,
3255 so it doesn't get garbage-collected at "random" times,
3256 causing potential codegen differences out of different UIDs
3257 and different alias set numbers. */
3258 stype = build_nonstandard_integer_type (-size, 0);
3259 TREE_CHAIN (type) = stype;
3260 /*if (size == -1) TREE_SET_CODE (type, BOOLEAN_TYPE);*/
3263 { /* "__java_float" or ""__java_double". */
3264 type = make_node (REAL_TYPE);
3265 TYPE_PRECISION (type) = - size;
3268 record_builtin_type (RID_MAX, name, type);
3269 decl = TYPE_NAME (type);
3271 /* Suppress generate debug symbol entries for these types,
3272 since for normal C++ they are just clutter.
3273 However, push_lang_context undoes this if extern "Java" is seen. */
3274 DECL_IGNORED_P (decl) = 1;
3276 TYPE_FOR_JAVA (type) = 1;
3280 /* Push a type into the namespace so that the back ends ignore it. */
3283 record_unknown_type (tree type, const char* name)
3285 tree decl = pushdecl (build_decl (UNKNOWN_LOCATION,
3286 TYPE_DECL, get_identifier (name), type));
3287 /* Make sure the "unknown type" typedecl gets ignored for debug info. */
3288 DECL_IGNORED_P (decl) = 1;
3289 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
3290 TYPE_SIZE (type) = TYPE_SIZE (void_type_node);
3291 TYPE_ALIGN (type) = 1;
3292 TYPE_USER_ALIGN (type) = 0;
3293 SET_TYPE_MODE (type, TYPE_MODE (void_type_node));
3296 /* A string for which we should create an IDENTIFIER_NODE at
3299 typedef struct predefined_identifier
3301 /* The name of the identifier. */
3302 const char *const name;
3303 /* The place where the IDENTIFIER_NODE should be stored. */
3305 /* Nonzero if this is the name of a constructor or destructor. */
3306 const int ctor_or_dtor_p;
3307 } predefined_identifier;
3309 /* Create all the predefined identifiers. */
3312 initialize_predefined_identifiers (void)
3314 const predefined_identifier *pid;
3316 /* A table of identifiers to create at startup. */
3317 static const predefined_identifier predefined_identifiers[] = {
3318 { "C++", &lang_name_cplusplus, 0 },
3319 { "C", &lang_name_c, 0 },
3320 { "Java", &lang_name_java, 0 },
3321 /* Some of these names have a trailing space so that it is
3322 impossible for them to conflict with names written by users. */
3323 { "__ct ", &ctor_identifier, 1 },
3324 { "__base_ctor ", &base_ctor_identifier, 1 },
3325 { "__comp_ctor ", &complete_ctor_identifier, 1 },
3326 { "__dt ", &dtor_identifier, 1 },
3327 { "__comp_dtor ", &complete_dtor_identifier, 1 },
3328 { "__base_dtor ", &base_dtor_identifier, 1 },
3329 { "__deleting_dtor ", &deleting_dtor_identifier, 1 },
3330 { IN_CHARGE_NAME, &in_charge_identifier, 0 },
3331 { "nelts", &nelts_identifier, 0 },
3332 { THIS_NAME, &this_identifier, 0 },
3333 { VTABLE_DELTA_NAME, &delta_identifier, 0 },
3334 { VTABLE_PFN_NAME, &pfn_identifier, 0 },
3335 { "_vptr", &vptr_identifier, 0 },
3336 { "__vtt_parm", &vtt_parm_identifier, 0 },
3337 { "::", &global_scope_name, 0 },
3338 { "std", &std_identifier, 0 },
3342 for (pid = predefined_identifiers; pid->name; ++pid)
3344 *pid->node = get_identifier (pid->name);
3345 if (pid->ctor_or_dtor_p)
3346 IDENTIFIER_CTOR_OR_DTOR_P (*pid->node) = 1;
3350 /* Create the predefined scalar types of C,
3351 and some nodes representing standard constants (0, 1, (void *)0).
3352 Initialize the global binding level.
3353 Make definitions for built-in primitive functions. */
3356 cxx_init_decl_processing (void)
3359 tree void_ftype_ptr;
3361 build_common_tree_nodes (flag_signed_char);
3363 /* Create all the identifiers we need. */
3364 initialize_predefined_identifiers ();
3366 /* Create the global variables. */
3367 push_to_top_level ();
3369 current_function_decl = NULL_TREE;
3370 current_binding_level = NULL;
3371 /* Enter the global namespace. */
3372 gcc_assert (global_namespace == NULL_TREE);
3373 global_namespace = build_lang_decl (NAMESPACE_DECL, global_scope_name,
3375 TREE_PUBLIC (global_namespace) = 1;
3376 begin_scope (sk_namespace, global_namespace);
3378 current_lang_name = NULL_TREE;
3380 if (flag_visibility_ms_compat)
3381 default_visibility = VISIBILITY_HIDDEN;
3384 current_lang_name = lang_name_c;
3386 /* Create the `std' namespace. */
3387 push_namespace (std_identifier);
3388 std_node = current_namespace;
3391 c_common_nodes_and_builtins ();
3393 java_byte_type_node = record_builtin_java_type ("__java_byte", 8);
3394 java_short_type_node = record_builtin_java_type ("__java_short", 16);
3395 java_int_type_node = record_builtin_java_type ("__java_int", 32);
3396 java_long_type_node = record_builtin_java_type ("__java_long", 64);
3397 java_float_type_node = record_builtin_java_type ("__java_float", -32);
3398 java_double_type_node = record_builtin_java_type ("__java_double", -64);
3399 java_char_type_node = record_builtin_java_type ("__java_char", -16);
3400 java_boolean_type_node = record_builtin_java_type ("__java_boolean", -1);
3402 integer_two_node = build_int_cst (NULL_TREE, 2);
3403 integer_three_node = build_int_cst (NULL_TREE, 3);
3405 record_builtin_type (RID_BOOL, "bool", boolean_type_node);
3406 truthvalue_type_node = boolean_type_node;
3407 truthvalue_false_node = boolean_false_node;
3408 truthvalue_true_node = boolean_true_node;
3410 empty_except_spec = build_tree_list (NULL_TREE, NULL_TREE);
3413 record_builtin_type (RID_MAX, NULL, string_type_node);
3416 delta_type_node = ptrdiff_type_node;
3417 vtable_index_type = ptrdiff_type_node;
3419 vtt_parm_type = build_pointer_type (const_ptr_type_node);
3420 void_ftype = build_function_type (void_type_node, void_list_node);
3421 void_ftype_ptr = build_function_type (void_type_node,
3422 tree_cons (NULL_TREE,
3426 = build_exception_variant (void_ftype_ptr, empty_except_spec);
3428 /* C++ extensions */
3430 unknown_type_node = make_node (UNKNOWN_TYPE);
3431 record_unknown_type (unknown_type_node, "unknown type");
3433 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
3434 TREE_TYPE (unknown_type_node) = unknown_type_node;
3436 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
3438 TYPE_POINTER_TO (unknown_type_node) = unknown_type_node;
3439 TYPE_REFERENCE_TO (unknown_type_node) = unknown_type_node;
3441 init_list_type_node = make_node (UNKNOWN_TYPE);
3442 record_unknown_type (init_list_type_node, "init list");
3445 /* Make sure we get a unique function type, so we can give
3446 its pointer type a name. (This wins for gdb.) */
3447 tree vfunc_type = make_node (FUNCTION_TYPE);
3448 TREE_TYPE (vfunc_type) = integer_type_node;
3449 TYPE_ARG_TYPES (vfunc_type) = NULL_TREE;
3450 layout_type (vfunc_type);
3452 vtable_entry_type = build_pointer_type (vfunc_type);
3454 record_builtin_type (RID_MAX, VTBL_PTR_TYPE, vtable_entry_type);
3457 = build_cplus_array_type (vtable_entry_type, NULL_TREE);
3458 layout_type (vtbl_type_node);
3459 vtbl_type_node = build_qualified_type (vtbl_type_node, TYPE_QUAL_CONST);
3460 record_builtin_type (RID_MAX, NULL, vtbl_type_node);
3461 vtbl_ptr_type_node = build_pointer_type (vtable_entry_type);
3462 layout_type (vtbl_ptr_type_node);
3463 record_builtin_type (RID_MAX, NULL, vtbl_ptr_type_node);
3465 push_namespace (get_identifier ("__cxxabiv1"));
3466 abi_node = current_namespace;
3469 global_type_node = make_node (LANG_TYPE);
3470 record_unknown_type (global_type_node, "global type");
3473 current_lang_name = lang_name_cplusplus;
3477 tree bad_alloc_type_node;
3478 tree bad_alloc_decl;
3479 tree newtype, deltype;
3480 tree ptr_ftype_sizetype;
3482 push_namespace (std_identifier);
3483 bad_alloc_id = get_identifier ("bad_alloc");
3484 bad_alloc_type_node = make_class_type (RECORD_TYPE);
3485 TYPE_CONTEXT (bad_alloc_type_node) = current_namespace;
3487 = create_implicit_typedef (bad_alloc_id, bad_alloc_type_node);
3488 DECL_CONTEXT (bad_alloc_decl) = current_namespace;
3492 = build_function_type (ptr_type_node,
3493 tree_cons (NULL_TREE,
3496 newtype = build_exception_variant
3497 (ptr_ftype_sizetype, add_exception_specifier
3498 (NULL_TREE, bad_alloc_type_node, -1));
3499 deltype = build_exception_variant (void_ftype_ptr, empty_except_spec);
3500 push_cp_library_fn (NEW_EXPR, newtype);
3501 push_cp_library_fn (VEC_NEW_EXPR, newtype);
3502 global_delete_fndecl = push_cp_library_fn (DELETE_EXPR, deltype);
3503 push_cp_library_fn (VEC_DELETE_EXPR, deltype);
3507 = build_library_fn_ptr ("__cxa_pure_virtual", void_ftype);
3509 /* Perform other language dependent initializations. */
3510 init_class_processing ();
3511 init_rtti_processing ();
3512 init_template_processing ();
3514 if (flag_exceptions)
3515 init_exception_processing ();
3517 if (! supports_one_only ())
3520 make_fname_decl = cp_make_fname_decl;
3521 start_fname_decls ();
3523 /* Show we use EH for cleanups. */
3524 if (flag_exceptions)
3525 using_eh_for_cleanups ();
3528 /* Generate an initializer for a function naming variable from
3529 NAME. NAME may be NULL, to indicate a dependent name. TYPE_P is
3530 filled in with the type of the init. */
3533 cp_fname_init (const char* name, tree *type_p)
3535 tree domain = NULL_TREE;
3537 tree init = NULL_TREE;
3542 length = strlen (name);
3543 domain = build_index_type (size_int (length));
3544 init = build_string (length + 1, name);
3547 type = build_qualified_type (char_type_node, TYPE_QUAL_CONST);
3548 type = build_cplus_array_type (type, domain);
3553 TREE_TYPE (init) = type;
3555 init = error_mark_node;
3560 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give
3561 the decl, LOC is the location to give the decl, NAME is the
3562 initialization string and TYPE_DEP indicates whether NAME depended
3563 on the type of the function. We make use of that to detect
3564 __PRETTY_FUNCTION__ inside a template fn. This is being done lazily
3565 at the point of first use, so we mustn't push the decl now. */
3568 cp_make_fname_decl (location_t loc, tree id, int type_dep)
3570 const char *const name = (type_dep && processing_template_decl
3571 ? NULL : fname_as_string (type_dep));
3573 tree init = cp_fname_init (name, &type);
3574 tree decl = build_decl (loc, VAR_DECL, id, type);
3577 free (CONST_CAST (char *, name));
3579 /* As we're using pushdecl_with_scope, we must set the context. */
3580 DECL_CONTEXT (decl) = current_function_decl;
3581 DECL_PRETTY_FUNCTION_P (decl) = type_dep;
3583 TREE_STATIC (decl) = 1;
3584 TREE_READONLY (decl) = 1;
3585 DECL_ARTIFICIAL (decl) = 1;
3587 TREE_USED (decl) = 1;
3589 if (current_function_decl)
3591 struct cp_binding_level *b = current_binding_level;
3592 while (b->level_chain->kind != sk_function_parms)
3594 pushdecl_with_scope (decl, b, /*is_friend=*/false);
3595 cp_finish_decl (decl, init, /*init_const_expr_p=*/false, NULL_TREE,
3596 LOOKUP_ONLYCONVERTING);
3599 pushdecl_top_level_and_finish (decl, init);
3605 builtin_function_1 (tree decl, tree context, bool is_global)
3607 tree id = DECL_NAME (decl);
3608 const char *name = IDENTIFIER_POINTER (id);
3610 retrofit_lang_decl (decl);
3612 DECL_ARTIFICIAL (decl) = 1;
3613 SET_OVERLOADED_OPERATOR_CODE (decl, ERROR_MARK);
3614 SET_DECL_LANGUAGE (decl, lang_c);
3615 /* Runtime library routines are, by definition, available in an
3616 external shared object. */
3617 DECL_VISIBILITY (decl) = VISIBILITY_DEFAULT;
3618 DECL_VISIBILITY_SPECIFIED (decl) = 1;
3620 DECL_CONTEXT (decl) = context;
3623 pushdecl_top_level (decl);
3627 /* A function in the user's namespace should have an explicit
3628 declaration before it is used. Mark the built-in function as
3629 anticipated but not actually declared. */
3630 if (name[0] != '_' || name[1] != '_')
3631 DECL_ANTICIPATED (decl) = 1;
3632 else if (strncmp (name + 2, "builtin_", strlen ("builtin_")) != 0)
3634 size_t len = strlen (name);
3636 /* Treat __*_chk fortification functions as anticipated as well,
3637 unless they are __builtin_*. */
3638 if (len > strlen ("___chk")
3639 && memcmp (name + len - strlen ("_chk"),
3640 "_chk", strlen ("_chk") + 1) == 0)
3641 DECL_ANTICIPATED (decl) = 1;
3648 cxx_builtin_function (tree decl)
3650 tree id = DECL_NAME (decl);
3651 const char *name = IDENTIFIER_POINTER (id);
3652 /* All builtins that don't begin with an '_' should additionally
3653 go in the 'std' namespace. */
3656 tree decl2 = copy_node(decl);
3657 push_namespace (std_identifier);
3658 builtin_function_1 (decl2, std_node, false);
3662 return builtin_function_1 (decl, NULL_TREE, false);
3665 /* Like cxx_builtin_function, but guarantee the function is added to the global
3666 scope. This is to allow function specific options to add new machine
3667 dependent builtins when the target ISA changes via attribute((target(...)))
3668 which saves space on program startup if the program does not use non-generic
3672 cxx_builtin_function_ext_scope (tree decl)
3675 tree id = DECL_NAME (decl);
3676 const char *name = IDENTIFIER_POINTER (id);
3677 /* All builtins that don't begin with an '_' should additionally
3678 go in the 'std' namespace. */
3681 tree decl2 = copy_node(decl);
3682 push_namespace (std_identifier);
3683 builtin_function_1 (decl2, std_node, true);
3687 return builtin_function_1 (decl, NULL_TREE, true);
3690 /* Generate a FUNCTION_DECL with the typical flags for a runtime library
3691 function. Not called directly. */
3694 build_library_fn_1 (tree name, enum tree_code operator_code, tree type)
3696 tree fn = build_lang_decl (FUNCTION_DECL, name, type);
3697 DECL_EXTERNAL (fn) = 1;
3698 TREE_PUBLIC (fn) = 1;
3699 DECL_ARTIFICIAL (fn) = 1;
3700 SET_OVERLOADED_OPERATOR_CODE (fn, operator_code);
3701 SET_DECL_LANGUAGE (fn, lang_c);
3702 /* Runtime library routines are, by definition, available in an
3703 external shared object. */
3704 DECL_VISIBILITY (fn) = VISIBILITY_DEFAULT;
3705 DECL_VISIBILITY_SPECIFIED (fn) = 1;
3709 /* Returns the _DECL for a library function with C linkage.
3710 We assume that such functions never throw; if this is incorrect,
3711 callers should unset TREE_NOTHROW. */
3714 build_library_fn (tree name, tree type)
3716 tree fn = build_library_fn_1 (name, ERROR_MARK, type);
3717 TREE_NOTHROW (fn) = 1;
3721 /* Returns the _DECL for a library function with C++ linkage. */
3724 build_cp_library_fn (tree name, enum tree_code operator_code, tree type)
3726 tree fn = build_library_fn_1 (name, operator_code, type);
3727 TREE_NOTHROW (fn) = TYPE_NOTHROW_P (type);
3728 DECL_CONTEXT (fn) = FROB_CONTEXT (current_namespace);
3729 SET_DECL_LANGUAGE (fn, lang_cplusplus);
3733 /* Like build_library_fn, but takes a C string instead of an
3737 build_library_fn_ptr (const char* name, tree type)
3739 return build_library_fn (get_identifier (name), type);
3742 /* Like build_cp_library_fn, but takes a C string instead of an
3746 build_cp_library_fn_ptr (const char* name, tree type)
3748 return build_cp_library_fn (get_identifier (name), ERROR_MARK, type);
3751 /* Like build_library_fn, but also pushes the function so that we will
3752 be able to find it via IDENTIFIER_GLOBAL_VALUE. Also, the function
3753 may throw exceptions listed in RAISES. */
3756 push_library_fn (tree name, tree type, tree raises)
3761 type = build_exception_variant (type, raises);
3763 fn = build_library_fn (name, type);
3764 pushdecl_top_level (fn);
3768 /* Like build_cp_library_fn, but also pushes the function so that it
3769 will be found by normal lookup. */
3772 push_cp_library_fn (enum tree_code operator_code, tree type)
3774 tree fn = build_cp_library_fn (ansi_opname (operator_code),
3781 /* Like push_library_fn, but takes a TREE_LIST of parm types rather than
3785 push_void_library_fn (tree name, tree parmtypes)
3787 tree type = build_function_type (void_type_node, parmtypes);
3788 return push_library_fn (name, type, NULL_TREE);
3791 /* Like push_library_fn, but also note that this function throws
3792 and does not return. Used for __throw_foo and the like. */
3795 push_throw_library_fn (tree name, tree type)
3797 tree fn = push_library_fn (name, type, NULL_TREE);
3798 TREE_THIS_VOLATILE (fn) = 1;
3799 TREE_NOTHROW (fn) = 0;
3803 /* When we call finish_struct for an anonymous union, we create
3804 default copy constructors and such. But, an anonymous union
3805 shouldn't have such things; this function undoes the damage to the
3806 anonymous union type T.
3808 (The reason that we create the synthesized methods is that we don't
3809 distinguish `union { int i; }' from `typedef union { int i; } U'.
3810 The first is an anonymous union; the second is just an ordinary
3814 fixup_anonymous_aggr (tree t)
3818 /* Wipe out memory of synthesized methods. */
3819 TYPE_HAS_USER_CONSTRUCTOR (t) = 0;
3820 TYPE_HAS_DEFAULT_CONSTRUCTOR (t) = 0;
3821 TYPE_HAS_INIT_REF (t) = 0;
3822 TYPE_HAS_CONST_INIT_REF (t) = 0;
3823 TYPE_HAS_ASSIGN_REF (t) = 0;
3824 TYPE_HAS_CONST_ASSIGN_REF (t) = 0;
3826 /* Splice the implicitly generated functions out of the TYPE_METHODS
3828 q = &TYPE_METHODS (t);
3831 if (DECL_ARTIFICIAL (*q))
3832 *q = TREE_CHAIN (*q);
3834 q = &TREE_CHAIN (*q);
3837 /* ISO C++ 9.5.3. Anonymous unions may not have function members. */
3838 if (TYPE_METHODS (t))
3840 tree decl = TYPE_MAIN_DECL (t);
3842 if (TREE_CODE (t) != UNION_TYPE)
3843 error_at (DECL_SOURCE_LOCATION (decl),
3844 "an anonymous struct cannot have function members");
3846 error_at (DECL_SOURCE_LOCATION (decl),
3847 "an anonymous union cannot have function members");
3850 /* Anonymous aggregates cannot have fields with ctors, dtors or complex
3851 assignment operators (because they cannot have these methods themselves).
3852 For anonymous unions this is already checked because they are not allowed
3853 in any union, otherwise we have to check it. */
3854 if (TREE_CODE (t) != UNION_TYPE)
3858 for (field = TYPE_FIELDS (t); field; field = TREE_CHAIN (field))
3859 if (TREE_CODE (field) == FIELD_DECL)
3861 type = TREE_TYPE (field);
3862 if (CLASS_TYPE_P (type))
3864 if (TYPE_NEEDS_CONSTRUCTING (type))
3865 error ("member %q+#D with constructor not allowed "
3866 "in anonymous aggregate", field);
3867 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
3868 error ("member %q+#D with destructor not allowed "
3869 "in anonymous aggregate", field);
3870 if (TYPE_HAS_COMPLEX_ASSIGN_REF (type))
3871 error ("member %q+#D with copy assignment operator "
3872 "not allowed in anonymous aggregate", field);
3878 /* Make sure that a declaration with no declarator is well-formed, i.e.
3879 just declares a tagged type or anonymous union.
3881 Returns the type declared; or NULL_TREE if none. */
3884 check_tag_decl (cp_decl_specifier_seq *declspecs)
3886 int saw_friend = declspecs->specs[(int)ds_friend] != 0;
3887 int saw_typedef = declspecs->specs[(int)ds_typedef] != 0;
3888 /* If a class, struct, or enum type is declared by the DECLSPECS
3889 (i.e, if a class-specifier, enum-specifier, or non-typename
3890 elaborated-type-specifier appears in the DECLSPECS),
3891 DECLARED_TYPE is set to the corresponding type. */
3892 tree declared_type = NULL_TREE;
3893 bool error_p = false;
3895 if (declspecs->multiple_types_p)
3896 error ("multiple types in one declaration");
3897 else if (declspecs->redefined_builtin_type)
3899 if (!in_system_header)
3900 permerror (input_location, "redeclaration of C++ built-in type %qT",
3901 declspecs->redefined_builtin_type);
3906 && TYPE_P (declspecs->type)
3907 && ((TREE_CODE (declspecs->type) != TYPENAME_TYPE
3908 && MAYBE_CLASS_TYPE_P (declspecs->type))
3909 || TREE_CODE (declspecs->type) == ENUMERAL_TYPE))
3910 declared_type = declspecs->type;
3911 else if (declspecs->type == error_mark_node)
3913 if (declared_type == NULL_TREE && ! saw_friend && !error_p)
3914 permerror (input_location, "declaration does not declare anything");
3915 /* Check for an anonymous union. */
3916 else if (declared_type && RECORD_OR_UNION_CODE_P (TREE_CODE (declared_type))
3917 && TYPE_ANONYMOUS_P (declared_type))
3919 /* 7/3 In a simple-declaration, the optional init-declarator-list
3920 can be omitted only when declaring a class (clause 9) or
3921 enumeration (7.2), that is, when the decl-specifier-seq contains
3922 either a class-specifier, an elaborated-type-specifier with
3923 a class-key (9.1), or an enum-specifier. In these cases and
3924 whenever a class-specifier or enum-specifier is present in the
3925 decl-specifier-seq, the identifiers in these specifiers are among
3926 the names being declared by the declaration (as class-name,
3927 enum-names, or enumerators, depending on the syntax). In such
3928 cases, and except for the declaration of an unnamed bit-field (9.6),
3929 the decl-specifier-seq shall introduce one or more names into the
3930 program, or shall redeclare a name introduced by a previous
3931 declaration. [Example:
3932 enum { }; // ill-formed
3933 typedef class { }; // ill-formed
3937 error ("missing type-name in typedef-declaration");
3940 /* Anonymous unions are objects, so they can have specifiers. */;
3941 SET_ANON_AGGR_TYPE_P (declared_type);
3943 if (TREE_CODE (declared_type) != UNION_TYPE && !in_system_header)
3944 pedwarn (input_location, OPT_pedantic, "ISO C++ prohibits anonymous structs");
3949 if (declspecs->specs[(int)ds_inline]
3950 || declspecs->specs[(int)ds_virtual])
3951 error ("%qs can only be specified for functions",
3952 declspecs->specs[(int)ds_inline]
3953 ? "inline" : "virtual");
3955 && (!current_class_type
3956 || current_scope () != current_class_type))
3957 error ("%<friend%> can only be specified inside a class");
3958 else if (declspecs->specs[(int)ds_explicit])
3959 error ("%<explicit%> can only be specified for constructors");
3960 else if (declspecs->storage_class)
3961 error ("a storage class can only be specified for objects "
3963 else if (declspecs->specs[(int)ds_const]
3964 || declspecs->specs[(int)ds_volatile]
3965 || declspecs->specs[(int)ds_restrict]
3966 || declspecs->specs[(int)ds_thread])
3967 error ("qualifiers can only be specified for objects "
3969 else if (saw_typedef)
3970 warning (0, "%<typedef%> was ignored in this declaration");
3971 else if (declspecs->specs[(int) ds_constexpr])
3972 error ("%<constexpr> cannot be used for type declarations");
3975 return declared_type;
3978 /* Called when a declaration is seen that contains no names to declare.
3979 If its type is a reference to a structure, union or enum inherited
3980 from a containing scope, shadow that tag name for the current scope
3981 with a forward reference.
3982 If its type defines a new named structure or union
3983 or defines an enum, it is valid but we need not do anything here.
3984 Otherwise, it is an error.
3986 C++: may have to grok the declspecs to learn about static,
3987 complain for anonymous unions.
3989 Returns the TYPE declared -- or NULL_TREE if none. */
3992 shadow_tag (cp_decl_specifier_seq *declspecs)
3994 tree t = check_tag_decl (declspecs);
3999 if (declspecs->attributes)
4001 warning (0, "attribute ignored in declaration of %q+#T", t);
4002 warning (0, "attribute for %q+#T must follow the %qs keyword",
4003 t, class_key_or_enum_as_string (t));
4007 if (maybe_process_partial_specialization (t) == error_mark_node)
4010 /* This is where the variables in an anonymous union are
4011 declared. An anonymous union declaration looks like:
4013 because there is no declarator after the union, the parser
4014 sends that declaration here. */
4015 if (ANON_AGGR_TYPE_P (t))
4017 fixup_anonymous_aggr (t);
4019 if (TYPE_FIELDS (t))
4021 tree decl = grokdeclarator (/*declarator=*/NULL,
4022 declspecs, NORMAL, 0, NULL);
4023 finish_anon_union (decl);
4030 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
4033 groktypename (cp_decl_specifier_seq *type_specifiers,
4034 const cp_declarator *declarator,
4035 bool is_template_arg)
4039 enum decl_context context
4040 = is_template_arg ? TEMPLATE_TYPE_ARG : TYPENAME;
4041 attrs = type_specifiers->attributes;
4042 type_specifiers->attributes = NULL_TREE;
4043 type = grokdeclarator (declarator, type_specifiers, context, 0, &attrs);
4044 if (attrs && type != error_mark_node)
4046 if (CLASS_TYPE_P (type))
4047 warning (OPT_Wattributes, "ignoring attributes applied to class type %qT "
4048 "outside of definition", type);
4049 else if (MAYBE_CLASS_TYPE_P (type))
4050 /* A template type parameter or other dependent type. */
4051 warning (OPT_Wattributes, "ignoring attributes applied to dependent "
4052 "type %qT without an associated declaration", type);
4054 cplus_decl_attributes (&type, attrs, 0);
4059 /* Process a DECLARATOR for a function-scope variable declaration,
4060 namespace-scope variable declaration, or function declaration.
4061 (Function definitions go through start_function; class member
4062 declarations appearing in the body of the class go through
4063 grokfield.) The DECL corresponding to the DECLARATOR is returned.
4064 If an error occurs, the error_mark_node is returned instead.
4066 DECLSPECS are the decl-specifiers for the declaration. INITIALIZED is
4067 SD_INITIALIZED if an explicit initializer is present, or SD_DEFAULTED
4068 for an explicitly defaulted function, or SD_DELETED for an explicitly
4069 deleted function, but 0 (SD_UNINITIALIZED) if this is a variable
4070 implicitly initialized via a default constructor. ATTRIBUTES and
4071 PREFIX_ATTRIBUTES are GNU attributes associated with this declaration.
4072 *PUSHED_SCOPE_P is set to the scope entered in this function, if any; if
4073 set, the caller is responsible for calling pop_scope. */
4076 start_decl (const cp_declarator *declarator,
4077 cp_decl_specifier_seq *declspecs,
4080 tree prefix_attributes,
4081 tree *pushed_scope_p)
4088 *pushed_scope_p = NULL_TREE;
4090 /* An object declared as __attribute__((deprecated)) suppresses
4091 warnings of uses of other deprecated items. */
4092 if (lookup_attribute ("deprecated", attributes))
4093 deprecated_state = DEPRECATED_SUPPRESS;
4095 attributes = chainon (attributes, prefix_attributes);
4097 decl = grokdeclarator (declarator, declspecs, NORMAL, initialized,
4100 deprecated_state = DEPRECATED_NORMAL;
4102 if (decl == NULL_TREE || TREE_CODE (decl) == VOID_TYPE
4103 || decl == error_mark_node)
4104 return error_mark_node;
4106 context = DECL_CONTEXT (decl);
4110 *pushed_scope_p = push_scope (context);
4112 /* We are only interested in class contexts, later. */
4113 if (TREE_CODE (context) == NAMESPACE_DECL)
4114 context = NULL_TREE;
4118 /* Is it valid for this decl to have an initializer at all?
4119 If not, set INITIALIZED to zero, which will indirectly
4120 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
4121 switch (TREE_CODE (decl))
4124 error ("typedef %qD is initialized (use decltype instead)", decl);
4125 return error_mark_node;
4128 if (initialized == SD_DELETED)
4129 /* We'll handle the rest of the semantics later, but we need to
4130 set this now so it's visible to duplicate_decls. */
4131 DECL_DELETED_FN (decl) = 1;
4140 if (! toplevel_bindings_p ()
4141 && DECL_EXTERNAL (decl))
4142 warning (0, "declaration of %q#D has %<extern%> and is initialized",
4144 DECL_EXTERNAL (decl) = 0;
4145 if (toplevel_bindings_p ())
4146 TREE_STATIC (decl) = 1;
4149 /* If this is a typedef that names the class for linkage purposes
4150 (7.1.3p8), apply any attributes directly to the type. */
4151 if (TREE_CODE (decl) == TYPE_DECL
4152 && TAGGED_TYPE_P (TREE_TYPE (decl))
4153 && decl == TYPE_NAME (TYPE_MAIN_VARIANT (TREE_TYPE (decl))))
4154 flags = ATTR_FLAG_TYPE_IN_PLACE;
4158 /* Set attributes here so if duplicate decl, will have proper attributes. */
4159 cplus_decl_attributes (&decl, attributes, flags);
4161 /* Dllimported symbols cannot be defined. Static data members (which
4162 can be initialized in-class and dllimported) go through grokfield,
4163 not here, so we don't need to exclude those decls when checking for
4165 if (initialized && DECL_DLLIMPORT_P (decl))
4167 error ("definition of %q#D is marked %<dllimport%>", decl);
4168 DECL_DLLIMPORT_P (decl) = 0;
4171 /* If #pragma weak was used, mark the decl weak now. */
4172 maybe_apply_pragma_weak (decl);
4174 if (TREE_CODE (decl) == FUNCTION_DECL
4175 && DECL_DECLARED_INLINE_P (decl)
4176 && DECL_UNINLINABLE (decl)
4177 && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl)))
4178 warning (0, "inline function %q+D given attribute noinline", decl);
4180 if (context && COMPLETE_TYPE_P (complete_type (context)))
4182 if (TREE_CODE (decl) == VAR_DECL)
4184 tree field = lookup_field (context, DECL_NAME (decl), 0, false);
4185 if (field == NULL_TREE || TREE_CODE (field) != VAR_DECL)
4186 error ("%q#D is not a static member of %q#T", decl, context);
4189 if (DECL_CONTEXT (field) != context)
4191 if (!same_type_p (DECL_CONTEXT (field), context))
4192 permerror (input_location, "ISO C++ does not permit %<%T::%D%> "
4193 "to be defined as %<%T::%D%>",
4194 DECL_CONTEXT (field), DECL_NAME (decl),
4195 context, DECL_NAME (decl));
4196 DECL_CONTEXT (decl) = DECL_CONTEXT (field);
4198 if (processing_specialization
4199 && template_class_depth (context) == 0
4200 && CLASSTYPE_TEMPLATE_SPECIALIZATION (context))
4201 error ("template header not allowed in member definition "
4202 "of explicitly specialized class");
4203 /* Static data member are tricky; an in-class initialization
4204 still doesn't provide a definition, so the in-class
4205 declaration will have DECL_EXTERNAL set, but will have an
4206 initialization. Thus, duplicate_decls won't warn
4207 about this situation, and so we check here. */
4208 if (initialized && DECL_INITIALIZED_IN_CLASS_P (field))
4209 error ("duplicate initialization of %qD", decl);
4210 if (duplicate_decls (decl, field, /*newdecl_is_friend=*/false))
4212 if (declspecs->specs[(int) ds_constexpr]
4213 && !DECL_DECLARED_CONSTEXPR_P (field))
4214 error ("%qD declared %<constexpr%> outside its class", field);
4219 tree field = check_classfn (context, decl,
4220 (processing_template_decl
4221 > template_class_depth (context))
4222 ? current_template_parms
4224 if (field && field != error_mark_node
4225 && duplicate_decls (decl, field,
4226 /*newdecl_is_friend=*/false))
4230 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
4231 DECL_IN_AGGR_P (decl) = 0;
4232 /* Do not mark DECL as an explicit specialization if it was not
4233 already marked as an instantiation; a declaration should
4234 never be marked as a specialization unless we know what
4235 template is being specialized. */
4236 if (DECL_LANG_SPECIFIC (decl) && DECL_USE_TEMPLATE (decl))
4238 SET_DECL_TEMPLATE_SPECIALIZATION (decl);
4240 /* [temp.expl.spec] An explicit specialization of a static data
4241 member of a template is a definition if the declaration
4242 includes an initializer; otherwise, it is a declaration.
4244 We check for processing_specialization so this only applies
4245 to the new specialization syntax. */
4246 if (!initialized && processing_specialization)
4247 DECL_EXTERNAL (decl) = 1;
4250 if (DECL_EXTERNAL (decl) && ! DECL_TEMPLATE_SPECIALIZATION (decl))
4251 permerror (input_location, "declaration of %q#D outside of class is not definition",
4254 if (!ensure_literal_type_for_constexpr_object (decl))
4255 return error_mark_node;
4258 was_public = TREE_PUBLIC (decl);
4260 /* Enter this declaration into the symbol table. */
4261 decl = maybe_push_decl (decl);
4263 if (processing_template_decl)
4264 decl = push_template_decl (decl);
4265 if (decl == error_mark_node)
4266 return error_mark_node;
4268 /* Tell the back end to use or not use .common as appropriate. If we say
4269 -fconserve-space, we want this to save .data space, at the expense of
4270 wrong semantics. If we say -fno-conserve-space, we want this to
4271 produce errors about redefs; to do this we force variables into the
4273 if (flag_conserve_space
4274 && TREE_CODE (decl) == VAR_DECL
4275 && TREE_PUBLIC (decl)
4276 && !DECL_THREAD_LOCAL_P (decl)
4277 && !have_global_bss_p ())
4278 DECL_COMMON (decl) = 1;
4280 if (TREE_CODE (decl) == VAR_DECL
4281 && DECL_NAMESPACE_SCOPE_P (decl) && !TREE_PUBLIC (decl) && !was_public
4282 && !DECL_THIS_STATIC (decl) && !DECL_ARTIFICIAL (decl))
4284 /* This is a const variable with implicit 'static'. Set
4285 DECL_THIS_STATIC so we can tell it from variables that are
4286 !TREE_PUBLIC because of the anonymous namespace. */
4287 gcc_assert (cp_type_readonly (TREE_TYPE (decl)));
4288 DECL_THIS_STATIC (decl) = 1;
4291 if (!processing_template_decl && TREE_CODE (decl) == VAR_DECL)
4292 start_decl_1 (decl, initialized);
4297 /* Process the declaration of a variable DECL. INITIALIZED is true
4298 iff DECL is explicitly initialized. (INITIALIZED is false if the
4299 variable is initialized via an implicitly-called constructor.)
4300 This function must be called for ordinary variables (including, for
4301 example, implicit instantiations of templates), but must not be
4302 called for template declarations. */
4305 start_decl_1 (tree decl, bool initialized)
4309 bool aggregate_definition_p;
4311 gcc_assert (!processing_template_decl);
4313 if (error_operand_p (decl))
4316 gcc_assert (TREE_CODE (decl) == VAR_DECL);
4318 type = TREE_TYPE (decl);
4319 complete_p = COMPLETE_TYPE_P (type);
4320 aggregate_definition_p = MAYBE_CLASS_TYPE_P (type) && !DECL_EXTERNAL (decl);
4322 /* If an explicit initializer is present, or if this is a definition
4323 of an aggregate, then we need a complete type at this point.
4324 (Scalars are always complete types, so there is nothing to
4325 check.) This code just sets COMPLETE_P; errors (if necessary)
4326 are issued below. */
4327 if ((initialized || aggregate_definition_p)
4329 && COMPLETE_TYPE_P (complete_type (type)))
4332 /* We will not yet have set TREE_READONLY on DECL if the type
4333 was "const", but incomplete, before this point. But, now, we
4334 have a complete type, so we can try again. */
4335 cp_apply_type_quals_to_decl (cp_type_quals (type), decl);
4339 /* Is it valid for this decl to have an initializer at all? */
4341 /* Don't allow initializations for incomplete types except for
4342 arrays which might be completed by the initialization. */
4344 ; /* A complete type is ok. */
4345 else if (type_uses_auto (type))
4346 ; /* An auto type is ok. */
4347 else if (TREE_CODE (type) != ARRAY_TYPE)
4349 error ("variable %q#D has initializer but incomplete type", decl);
4350 type = TREE_TYPE (decl) = error_mark_node;
4352 else if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (type))))
4354 if (DECL_LANG_SPECIFIC (decl) && DECL_TEMPLATE_INFO (decl))
4355 error ("elements of array %q#D have incomplete type", decl);
4356 /* else we already gave an error in start_decl. */
4359 else if (aggregate_definition_p && !complete_p)
4361 if (type_uses_auto (type))
4362 error ("declaration of %q#D has no initializer", decl);
4364 error ("aggregate %q#D has incomplete type and cannot be defined",
4366 /* Change the type so that assemble_variable will give
4367 DECL an rtl we can live with: (mem (const_int 0)). */
4368 type = TREE_TYPE (decl) = error_mark_node;
4371 /* Create a new scope to hold this declaration if necessary.
4372 Whether or not a new scope is necessary cannot be determined
4373 until after the type has been completed; if the type is a
4374 specialization of a class template it is not until after
4375 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
4376 will be set correctly. */
4377 maybe_push_cleanup_level (type);
4380 /* Handle initialization of references. DECL, TYPE, and INIT have the
4381 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
4382 but will be set to a new CLEANUP_STMT if a temporary is created
4383 that must be destroyed subsequently.
4385 Returns an initializer expression to use to initialize DECL, or
4386 NULL if the initialization can be performed statically.
4388 Quotes on semantics can be found in ARM 8.4.3. */
4391 grok_reference_init (tree decl, tree type, tree init, tree *cleanup)
4395 if (init == NULL_TREE)
4397 if ((DECL_LANG_SPECIFIC (decl) == 0
4398 || DECL_IN_AGGR_P (decl) == 0)
4399 && ! DECL_THIS_EXTERN (decl))
4400 error ("%qD declared as reference but not initialized", decl);
4404 if (TREE_CODE (init) == TREE_LIST)
4405 init = build_x_compound_expr_from_list (init, "initializer");
4407 if (TREE_CODE (TREE_TYPE (type)) != ARRAY_TYPE
4408 && TREE_CODE (TREE_TYPE (init)) == ARRAY_TYPE)
4409 /* Note: default conversion is only called in very special cases. */
4410 init = decay_conversion (init);
4412 /* Convert INIT to the reference type TYPE. This may involve the
4413 creation of a temporary, whose lifetime must be the same as that
4414 of the reference. If so, a DECL_EXPR for the temporary will be
4415 added just after the DECL_EXPR for DECL. That's why we don't set
4416 DECL_INITIAL for local references (instead assigning to them
4417 explicitly); we need to allow the temporary to be initialized
4419 tmp = initialize_reference (type, init, decl, cleanup, tf_warning_or_error);
4421 if (tmp == error_mark_node)
4423 else if (tmp == NULL_TREE)
4425 error ("cannot initialize %qT from %qT", type, TREE_TYPE (init));
4429 if (TREE_STATIC (decl) && !TREE_CONSTANT (tmp))
4432 DECL_INITIAL (decl) = tmp;
4437 /* Subroutine of check_initializer. We're initializing a DECL of
4438 std::initializer_list<T> TYPE from a braced-init-list INIT, and need to
4439 extend the lifetime of the underlying array to match that of the decl,
4440 just like for reference initialization. CLEANUP is as for
4441 grok_reference_init. */
4444 build_init_list_var_init (tree decl, tree type, tree init, tree *cleanup)
4446 tree aggr_init, array, arrtype;
4447 init = perform_implicit_conversion (type, init, tf_warning_or_error);
4448 if (error_operand_p (init))
4449 return error_mark_node;
4451 aggr_init = TARGET_EXPR_INITIAL (init);
4452 init = build2 (INIT_EXPR, type, decl, init);
4454 array = AGGR_INIT_EXPR_ARG (aggr_init, 1);
4455 arrtype = TREE_TYPE (array);
4457 gcc_assert (TREE_CODE (array) == ADDR_EXPR);
4458 array = TREE_OPERAND (array, 0);
4459 /* If the array is constant, finish_compound_literal already made it a
4460 static variable and we don't need to do anything here. */
4461 if (decl && TREE_CODE (array) == TARGET_EXPR)
4464 tree var = set_up_extended_ref_temp (decl, array, cleanup, &subinit);
4465 var = build_address (var);
4466 var = convert (arrtype, var);
4467 AGGR_INIT_EXPR_ARG (aggr_init, 1) = var;
4468 init = build2 (COMPOUND_EXPR, TREE_TYPE (init), subinit, init);
4473 /* Designated initializers in arrays are not supported in GNU C++.
4474 The parser cannot detect this error since it does not know whether
4475 a given brace-enclosed initializer is for a class type or for an
4476 array. This function checks that CE does not use a designated
4477 initializer. If it does, an error is issued. Returns true if CE
4478 is valid, i.e., does not have a designated initializer. */
4481 check_array_designated_initializer (const constructor_elt *ce)
4483 /* Designated initializers for array elements are not supported. */
4486 /* The parser only allows identifiers as designated
4488 if (ce->index == error_mark_node)
4489 error ("name used in a GNU-style designated "
4490 "initializer for an array");
4493 gcc_assert (TREE_CODE (ce->index) == IDENTIFIER_NODE);
4494 error ("name %qD used in a GNU-style designated "
4495 "initializer for an array", ce->index);
4503 /* When parsing `int a[] = {1, 2};' we don't know the size of the
4504 array until we finish parsing the initializer. If that's the
4505 situation we're in, update DECL accordingly. */
4508 maybe_deduce_size_from_array_init (tree decl, tree init)
4510 tree type = TREE_TYPE (decl);
4512 if (TREE_CODE (type) == ARRAY_TYPE
4513 && TYPE_DOMAIN (type) == NULL_TREE
4514 && TREE_CODE (decl) != TYPE_DECL)
4516 /* do_default is really a C-ism to deal with tentative definitions.
4517 But let's leave it here to ease the eventual merge. */
4518 int do_default = !DECL_EXTERNAL (decl);
4519 tree initializer = init ? init : DECL_INITIAL (decl);
4522 /* Check that there are no designated initializers in INIT, as
4523 those are not supported in GNU C++, and as the middle-end
4524 will crash if presented with a non-numeric designated
4526 if (initializer && TREE_CODE (initializer) == CONSTRUCTOR)
4528 VEC(constructor_elt,gc) *v = CONSTRUCTOR_ELTS (initializer);
4529 constructor_elt *ce;
4532 VEC_iterate (constructor_elt, v, i, ce);
4534 if (!check_array_designated_initializer (ce))
4540 failure = cp_complete_array_type (&TREE_TYPE (decl), initializer,
4544 error ("initializer fails to determine size of %qD", decl);
4545 TREE_TYPE (decl) = error_mark_node;
4547 else if (failure == 2)
4551 error ("array size missing in %qD", decl);
4552 TREE_TYPE (decl) = error_mark_node;
4554 /* If a `static' var's size isn't known, make it extern as
4555 well as static, so it does not get allocated. If it's not
4556 `static', then don't mark it extern; finish_incomplete_decl
4557 will give it a default size and it will get allocated. */
4558 else if (!pedantic && TREE_STATIC (decl) && !TREE_PUBLIC (decl))
4559 DECL_EXTERNAL (decl) = 1;
4561 else if (failure == 3)
4563 error ("zero-size array %qD", decl);
4564 TREE_TYPE (decl) = error_mark_node;
4568 cp_apply_type_quals_to_decl (cp_type_quals (TREE_TYPE (decl)), decl);
4570 relayout_decl (decl);
4574 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
4575 any appropriate error messages regarding the layout. */
4578 layout_var_decl (tree decl)
4582 type = TREE_TYPE (decl);
4583 if (type == error_mark_node)
4586 /* If we haven't already layed out this declaration, do so now.
4587 Note that we must not call complete type for an external object
4588 because it's type might involve templates that we are not
4589 supposed to instantiate yet. (And it's perfectly valid to say
4590 `extern X x' for some incomplete type `X'.) */
4591 if (!DECL_EXTERNAL (decl))
4592 complete_type (type);
4593 if (!DECL_SIZE (decl)
4594 && TREE_TYPE (decl) != error_mark_node
4595 && (COMPLETE_TYPE_P (type)
4596 || (TREE_CODE (type) == ARRAY_TYPE
4597 && !TYPE_DOMAIN (type)
4598 && COMPLETE_TYPE_P (TREE_TYPE (type)))))
4599 layout_decl (decl, 0);
4601 if (!DECL_EXTERNAL (decl) && DECL_SIZE (decl) == NULL_TREE)
4603 /* An automatic variable with an incomplete type: that is an error.
4604 Don't talk about array types here, since we took care of that
4605 message in grokdeclarator. */
4606 error ("storage size of %qD isn't known", decl);
4607 TREE_TYPE (decl) = error_mark_node;
4610 /* Keep this code around in case we later want to control debug info
4611 based on whether a type is "used". (jason 1999-11-11) */
4613 else if (!DECL_EXTERNAL (decl) && MAYBE_CLASS_TYPE_P (ttype))
4614 /* Let debugger know it should output info for this type. */
4615 note_debug_info_needed (ttype);
4617 if (TREE_STATIC (decl) && DECL_CLASS_SCOPE_P (decl))
4618 note_debug_info_needed (DECL_CONTEXT (decl));
4621 if ((DECL_EXTERNAL (decl) || TREE_STATIC (decl))
4622 && DECL_SIZE (decl) != NULL_TREE
4623 && ! TREE_CONSTANT (DECL_SIZE (decl)))
4625 if (TREE_CODE (DECL_SIZE (decl)) == INTEGER_CST)
4626 constant_expression_warning (DECL_SIZE (decl));
4629 error ("storage size of %qD isn't constant", decl);
4630 TREE_TYPE (decl) = error_mark_node;
4635 /* If a local static variable is declared in an inline function, or if
4636 we have a weak definition, we must endeavor to create only one
4637 instance of the variable at link-time. */
4640 maybe_commonize_var (tree decl)
4642 /* Static data in a function with comdat linkage also has comdat
4644 if (TREE_STATIC (decl)
4645 /* Don't mess with __FUNCTION__. */
4646 && ! DECL_ARTIFICIAL (decl)
4647 && DECL_FUNCTION_SCOPE_P (decl)
4648 && vague_linkage_p (DECL_CONTEXT (decl)))
4652 /* With weak symbols, we simply make the variable COMDAT;
4653 that will cause copies in multiple translations units to
4655 comdat_linkage (decl);
4659 if (DECL_INITIAL (decl) == NULL_TREE
4660 || DECL_INITIAL (decl) == error_mark_node)
4662 /* Without weak symbols, we can use COMMON to merge
4663 uninitialized variables. */
4664 TREE_PUBLIC (decl) = 1;
4665 DECL_COMMON (decl) = 1;
4669 /* While for initialized variables, we must use internal
4670 linkage -- which means that multiple copies will not
4672 TREE_PUBLIC (decl) = 0;
4673 DECL_COMMON (decl) = 0;
4674 warning_at (input_location, 0,
4675 "sorry: semantics of inline function static "
4676 "data %q+#D are wrong (you'll wind up "
4677 "with multiple copies)", decl);
4678 warning_at (DECL_SOURCE_LOCATION (decl), 0,
4679 " you can work around this by removing "
4684 else if (DECL_LANG_SPECIFIC (decl) && DECL_COMDAT (decl))
4685 /* Set it up again; we might have set DECL_INITIAL since the last
4687 comdat_linkage (decl);
4690 /* Issue an error message if DECL is an uninitialized const variable. */
4693 check_for_uninitialized_const_var (tree decl)
4695 tree type = strip_array_types (TREE_TYPE (decl));
4697 if (TREE_CODE (decl) == VAR_DECL && DECL_DECLARED_CONSTEXPR_P (decl)
4698 && DECL_INITIAL (decl) == NULL)
4699 error ("missing initializer for constexpr %qD", decl);
4701 /* ``Unless explicitly declared extern, a const object does not have
4702 external linkage and must be initialized. ($8.4; $12.1)'' ARM
4704 else if (TREE_CODE (decl) == VAR_DECL
4705 && TREE_CODE (type) != REFERENCE_TYPE
4706 && CP_TYPE_CONST_P (type)
4707 && (!TYPE_NEEDS_CONSTRUCTING (type)
4708 || !type_has_user_provided_default_constructor (type))
4709 && !DECL_INITIAL (decl))
4711 permerror (DECL_SOURCE_LOCATION (decl),
4712 "uninitialized const %qD", decl);
4714 if (CLASS_TYPE_P (type)
4715 && !type_has_user_provided_default_constructor (type))
4717 tree defaulted_ctor;
4719 inform (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (type)),
4720 "%q#T has no user-provided default constructor", type);
4721 defaulted_ctor = in_class_defaulted_default_constructor (type);
4723 inform (DECL_SOURCE_LOCATION (defaulted_ctor),
4724 "constructor is not user-provided because it is "
4725 "explicitly defaulted in the class body");
4730 /* Structure holding the current initializer being processed by reshape_init.
4731 CUR is a pointer to the current element being processed, END is a pointer
4732 after the last element present in the initializer. */
4733 typedef struct reshape_iterator_t
4735 constructor_elt *cur;
4736 constructor_elt *end;
4739 static tree reshape_init_r (tree, reshape_iter *, bool);
4741 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
4742 returned is the next FIELD_DECL (possibly FIELD itself) that can be
4743 initialized. If there are no more such fields, the return value
4747 next_initializable_field (tree field)
4750 && (TREE_CODE (field) != FIELD_DECL
4751 || (DECL_C_BIT_FIELD (field) && !DECL_NAME (field))
4752 || DECL_ARTIFICIAL (field)))
4753 field = TREE_CHAIN (field);
4758 /* Subroutine of reshape_init_array and reshape_init_vector, which does
4759 the actual work. ELT_TYPE is the element type of the array. MAX_INDEX is an
4760 INTEGER_CST representing the size of the array minus one (the maximum index),
4761 or NULL_TREE if the array was declared without specifying the size. D is
4762 the iterator within the constructor. */
4765 reshape_init_array_1 (tree elt_type, tree max_index, reshape_iter *d)
4768 bool sized_array_p = (max_index != NULL_TREE);
4769 unsigned HOST_WIDE_INT max_index_cst = 0;
4770 unsigned HOST_WIDE_INT index;
4772 /* The initializer for an array is always a CONSTRUCTOR. */
4773 new_init = build_constructor (init_list_type_node, NULL);
4777 /* Minus 1 is used for zero sized arrays. */
4778 if (integer_all_onesp (max_index))
4781 if (host_integerp (max_index, 1))
4782 max_index_cst = tree_low_cst (max_index, 1);
4783 /* sizetype is sign extended, not zero extended. */
4785 max_index_cst = tree_low_cst (fold_convert (size_type_node, max_index),
4789 /* Loop until there are no more initializers. */
4791 d->cur != d->end && (!sized_array_p || index <= max_index_cst);
4796 check_array_designated_initializer (d->cur);
4797 elt_init = reshape_init_r (elt_type, d, /*first_initializer_p=*/false);
4798 if (elt_init == error_mark_node)
4799 return error_mark_node;
4800 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init), NULL_TREE, elt_init);
4806 /* Subroutine of reshape_init_r, processes the initializers for arrays.
4807 Parameters are the same of reshape_init_r. */
4810 reshape_init_array (tree type, reshape_iter *d)
4812 tree max_index = NULL_TREE;
4814 gcc_assert (TREE_CODE (type) == ARRAY_TYPE);
4816 if (TYPE_DOMAIN (type))
4817 max_index = array_type_nelts (type);
4819 return reshape_init_array_1 (TREE_TYPE (type), max_index, d);
4822 /* Subroutine of reshape_init_r, processes the initializers for vectors.
4823 Parameters are the same of reshape_init_r. */
4826 reshape_init_vector (tree type, reshape_iter *d)
4828 tree max_index = NULL_TREE;
4831 gcc_assert (TREE_CODE (type) == VECTOR_TYPE);
4833 if (COMPOUND_LITERAL_P (d->cur->value))
4835 tree value = d->cur->value;
4836 if (!same_type_p (TREE_TYPE (value), type))
4838 error ("invalid type %qT as initializer for a vector of type %qT",
4839 TREE_TYPE (d->cur->value), type);
4840 value = error_mark_node;
4846 /* For a vector, the representation type is a struct
4847 containing a single member which is an array of the
4848 appropriate size. */
4849 rtype = TYPE_DEBUG_REPRESENTATION_TYPE (type);
4850 if (rtype && TYPE_DOMAIN (TREE_TYPE (TYPE_FIELDS (rtype))))
4851 max_index = array_type_nelts (TREE_TYPE (TYPE_FIELDS (rtype)));
4853 return reshape_init_array_1 (TREE_TYPE (type), max_index, d);
4856 /* Subroutine of reshape_init_r, processes the initializers for classes
4857 or union. Parameters are the same of reshape_init_r. */
4860 reshape_init_class (tree type, reshape_iter *d, bool first_initializer_p)
4865 gcc_assert (CLASS_TYPE_P (type));
4867 /* The initializer for a class is always a CONSTRUCTOR. */
4868 new_init = build_constructor (init_list_type_node, NULL);
4869 field = next_initializable_field (TYPE_FIELDS (type));
4875 An initializer for an aggregate member that is an
4876 empty class shall have the form of an empty
4877 initializer-list {}. */
4878 if (!first_initializer_p)
4880 error ("initializer for %qT must be brace-enclosed", type);
4881 return error_mark_node;
4886 /* Loop through the initializable fields, gathering initializers. */
4887 while (d->cur != d->end)
4891 /* Handle designated initializers, as an extension. */
4894 field = lookup_field_1 (type, d->cur->index, /*want_type=*/false);
4896 if (!field || TREE_CODE (field) != FIELD_DECL)
4898 error ("%qT has no non-static data member named %qD", type,
4900 return error_mark_node;
4904 /* If we processed all the member of the class, we are done. */
4908 field_init = reshape_init_r (TREE_TYPE (field), d,
4909 /*first_initializer_p=*/false);
4910 if (field_init == error_mark_node)
4911 return error_mark_node;
4913 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init), field, field_init);
4917 When a union is initialized with a brace-enclosed
4918 initializer, the braces shall only contain an
4919 initializer for the first member of the union. */
4920 if (TREE_CODE (type) == UNION_TYPE)
4923 field = next_initializable_field (TREE_CHAIN (field));
4929 /* Subroutine of reshape_init, which processes a single initializer (part of
4930 a CONSTRUCTOR). TYPE is the type of the variable being initialized, D is the
4931 iterator within the CONSTRUCTOR which points to the initializer to process.
4932 FIRST_INITIALIZER_P is true if this is the first initializer of the
4933 outermost CONSTRUCTOR node. */
4936 reshape_init_r (tree type, reshape_iter *d, bool first_initializer_p)
4938 tree init = d->cur->value;
4940 if (error_operand_p (init))
4941 return error_mark_node;
4943 /* A non-aggregate type is always initialized with a single
4945 if (!CP_AGGREGATE_TYPE_P (type))
4947 /* It is invalid to initialize a non-aggregate type with a
4948 brace-enclosed initializer before C++0x.
4949 We need to check for BRACE_ENCLOSED_INITIALIZER_P here because
4950 of g++.old-deja/g++.mike/p7626.C: a pointer-to-member constant is
4951 a CONSTRUCTOR (with a record type). */
4952 if (TREE_CODE (init) == CONSTRUCTOR
4953 && BRACE_ENCLOSED_INITIALIZER_P (init)) /* p7626.C */
4955 if (SCALAR_TYPE_P (type))
4957 error ("braces around scalar initializer for type %qT", type);
4958 init = error_mark_node;
4961 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS);
4970 All implicit type conversions (clause _conv_) are considered when
4971 initializing the aggregate member with an initializer from an
4972 initializer-list. If the initializer can initialize a member,
4973 the member is initialized. Otherwise, if the member is itself a
4974 non-empty subaggregate, brace elision is assumed and the
4975 initializer is considered for the initialization of the first
4976 member of the subaggregate. */
4977 if (TREE_CODE (init) != CONSTRUCTOR
4978 /* But don't try this for the first initializer, since that would be
4979 looking through the outermost braces; A a2 = { a1 }; is not a
4980 valid aggregate initialization. */
4981 && !first_initializer_p
4982 && (same_type_ignoring_top_level_qualifiers_p (type, TREE_TYPE (init))
4983 || can_convert_arg (type, TREE_TYPE (init), init, LOOKUP_NORMAL)))
4989 /* [dcl.init.string]
4991 A char array (whether plain char, signed char, or unsigned char)
4992 can be initialized by a string-literal (optionally enclosed in
4993 braces); a wchar_t array can be initialized by a wide
4994 string-literal (optionally enclosed in braces). */
4995 if (TREE_CODE (type) == ARRAY_TYPE
4996 && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type))))
4998 tree str_init = init;
5000 /* Strip one level of braces if and only if they enclose a single
5001 element (as allowed by [dcl.init.string]). */
5002 if (!first_initializer_p
5003 && TREE_CODE (str_init) == CONSTRUCTOR
5004 && VEC_length (constructor_elt, CONSTRUCTOR_ELTS (str_init)) == 1)
5006 str_init = VEC_index (constructor_elt,
5007 CONSTRUCTOR_ELTS (str_init), 0)->value;
5010 /* If it's a string literal, then it's the initializer for the array
5011 as a whole. Otherwise, continue with normal initialization for
5012 array types (one value per array element). */
5013 if (TREE_CODE (str_init) == STRING_CST)
5020 /* The following cases are about aggregates. If we are not within a full
5021 initializer already, and there is not a CONSTRUCTOR, it means that there
5022 is a missing set of braces (that is, we are processing the case for
5023 which reshape_init exists). */
5024 if (!first_initializer_p)
5026 if (TREE_CODE (init) == CONSTRUCTOR)
5028 if (TREE_TYPE (init) && TYPE_PTRMEMFUNC_P (TREE_TYPE (init)))
5029 /* There is no need to reshape pointer-to-member function
5030 initializers, as they are always constructed correctly
5031 by the front end. */
5033 else if (COMPOUND_LITERAL_P (init))
5034 /* For a nested compound literal, there is no need to reshape since
5035 brace elision is not allowed. Even if we decided to allow it,
5036 we should add a call to reshape_init in finish_compound_literal,
5037 before calling digest_init, so changing this code would still
5038 not be necessary. */
5039 gcc_assert (!BRACE_ENCLOSED_INITIALIZER_P (init));
5043 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init));
5044 return reshape_init (type, init);
5048 warning (OPT_Wmissing_braces, "missing braces around initializer for %qT",
5052 /* Dispatch to specialized routines. */
5053 if (CLASS_TYPE_P (type))
5054 return reshape_init_class (type, d, first_initializer_p);
5055 else if (TREE_CODE (type) == ARRAY_TYPE)
5056 return reshape_init_array (type, d);
5057 else if (TREE_CODE (type) == VECTOR_TYPE)
5058 return reshape_init_vector (type, d);
5063 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
5064 brace-enclosed aggregate initializer.
5066 INIT is the CONSTRUCTOR containing the list of initializers describing
5067 a brace-enclosed initializer for an entity of the indicated aggregate TYPE.
5068 It may not presently match the shape of the TYPE; for example:
5070 struct S { int a; int b; };
5071 struct S a[] = { 1, 2, 3, 4 };
5073 Here INIT will hold a VEC of four elements, rather than a
5074 VEC of two elements, each itself a VEC of two elements. This
5075 routine transforms INIT from the former form into the latter. The
5076 revised CONSTRUCTOR node is returned. */
5079 reshape_init (tree type, tree init)
5081 VEC(constructor_elt, gc) *v;
5085 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init));
5087 v = CONSTRUCTOR_ELTS (init);
5089 /* An empty constructor does not need reshaping, and it is always a valid
5091 if (VEC_empty (constructor_elt, v))
5094 /* Recurse on this CONSTRUCTOR. */
5095 d.cur = VEC_index (constructor_elt, v, 0);
5096 d.end = d.cur + VEC_length (constructor_elt, v);
5098 new_init = reshape_init_r (type, &d, true);
5099 if (new_init == error_mark_node)
5100 return error_mark_node;
5102 /* Make sure all the element of the constructor were used. Otherwise,
5103 issue an error about exceeding initializers. */
5105 error ("too many initializers for %qT", type);
5110 /* Verify array initializer. Returns true if errors have been reported. */
5113 check_array_initializer (tree decl, tree type, tree init)
5115 tree element_type = TREE_TYPE (type);
5117 /* The array type itself need not be complete, because the
5118 initializer may tell us how many elements are in the array.
5119 But, the elements of the array must be complete. */
5120 if (!COMPLETE_TYPE_P (complete_type (element_type)))
5123 error ("elements of array %q#D have incomplete type", decl);
5125 error ("elements of array %q#T have incomplete type", type);
5128 /* It is not valid to initialize a VLA. */
5130 && ((COMPLETE_TYPE_P (type) && !TREE_CONSTANT (TYPE_SIZE (type)))
5131 || !TREE_CONSTANT (TYPE_SIZE (element_type))))
5134 error ("variable-sized object %qD may not be initialized", decl);
5136 error ("variable-sized compound literal");
5142 /* Subroutine of check_initializer; args are passed down from that function.
5143 Set stmts_are_full_exprs_p to 1 across a call to build_aggr_init. */
5146 build_aggr_init_full_exprs (tree decl, tree init, int flags)
5149 int saved_stmts_are_full_exprs_p = 0;
5150 if (building_stmt_tree ())
5152 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
5153 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
5155 init = build_aggr_init (decl, init, flags, tf_warning_or_error);
5156 if (building_stmt_tree ())
5157 current_stmt_tree ()->stmts_are_full_exprs_p =
5158 saved_stmts_are_full_exprs_p;
5162 /* Verify INIT (the initializer for DECL), and record the
5163 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
5164 grok_reference_init.
5166 If the return value is non-NULL, it is an expression that must be
5167 evaluated dynamically to initialize DECL. */
5170 check_initializer (tree decl, tree init, int flags, tree *cleanup)
5172 tree type = TREE_TYPE (decl);
5173 tree init_code = NULL;
5175 /* Things that are going to be initialized need to have complete
5177 TREE_TYPE (decl) = type = complete_type (TREE_TYPE (decl));
5179 if (type == error_mark_node)
5180 /* We will have already complained. */
5183 if (TREE_CODE (type) == ARRAY_TYPE)
5185 if (check_array_initializer (decl, type, init))
5188 else if (!COMPLETE_TYPE_P (type))
5190 error ("%qD has incomplete type", decl);
5191 TREE_TYPE (decl) = error_mark_node;
5195 /* There is no way to make a variable-sized class type in GNU C++. */
5196 gcc_assert (TREE_CONSTANT (TYPE_SIZE (type)));
5198 if (init && BRACE_ENCLOSED_INITIALIZER_P (init))
5200 int init_len = VEC_length (constructor_elt, CONSTRUCTOR_ELTS (init));
5201 if (SCALAR_TYPE_P (type))
5205 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS);
5206 init = build_zero_init (type, NULL_TREE, false);
5208 else if (init_len != 1)
5210 error ("scalar object %qD requires one element in initializer",
5212 TREE_TYPE (decl) = error_mark_node;
5218 if (TREE_CODE (decl) == CONST_DECL)
5220 gcc_assert (TREE_CODE (type) != REFERENCE_TYPE);
5222 DECL_INITIAL (decl) = init;
5224 gcc_assert (init != NULL_TREE);
5227 else if (!DECL_EXTERNAL (decl) && TREE_CODE (type) == REFERENCE_TYPE)
5228 init = grok_reference_init (decl, type, init, cleanup);
5231 /* Do not reshape constructors of vectors (they don't need to be
5233 if (BRACE_ENCLOSED_INITIALIZER_P (init))
5235 if (is_std_init_list (type))
5236 return build_init_list_var_init (decl, type, init, cleanup);
5237 else if (TYPE_NON_AGGREGATE_CLASS (type))
5239 /* Don't reshape if the class has constructors. */
5240 if (cxx_dialect == cxx98)
5241 error ("in C++98 %qD must be initialized by constructor, "
5244 init = build_tree_list (NULL_TREE, init);
5246 else if (TREE_CODE (type) == VECTOR_TYPE && TYPE_VECTOR_OPAQUE (type))
5248 error ("opaque vector types cannot be initialized");
5249 init = error_mark_node;
5252 init = reshape_init (type, init);
5255 /* If DECL has an array type without a specific bound, deduce the
5256 array size from the initializer. */
5257 maybe_deduce_size_from_array_init (decl, init);
5258 type = TREE_TYPE (decl);
5259 if (type == error_mark_node)
5262 if (TYPE_NEEDS_CONSTRUCTING (type)
5263 || (CLASS_TYPE_P (type)
5264 && !BRACE_ENCLOSED_INITIALIZER_P (init)))
5265 return build_aggr_init_full_exprs (decl, init, flags);
5266 else if (TREE_CODE (init) != TREE_VEC)
5268 init_code = store_init_value (decl, init, flags);
5269 if (pedantic && TREE_CODE (type) == ARRAY_TYPE
5270 && DECL_INITIAL (decl)
5271 && TREE_CODE (DECL_INITIAL (decl)) == STRING_CST
5272 && PAREN_STRING_LITERAL_P (DECL_INITIAL (decl)))
5273 warning (0, "array %qD initialized by parenthesized string literal %qE",
5274 decl, DECL_INITIAL (decl));
5278 else if (DECL_EXTERNAL (decl))
5280 else if (TYPE_P (type) && TYPE_NEEDS_CONSTRUCTING (type))
5282 check_for_uninitialized_const_var (decl);
5283 return build_aggr_init_full_exprs (decl, init, flags);
5285 else if (MAYBE_CLASS_TYPE_P (type))
5287 tree core_type = strip_array_types (type);
5289 if (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type))
5290 error ("structure %qD with uninitialized const members", decl);
5291 if (CLASSTYPE_REF_FIELDS_NEED_INIT (core_type))
5292 error ("structure %qD with uninitialized reference members", decl);
5294 check_for_uninitialized_const_var (decl);
5297 check_for_uninitialized_const_var (decl);
5299 if (init && init != error_mark_node)
5300 init_code = build2 (INIT_EXPR, type, decl, init);
5305 /* If DECL is not a local variable, give it RTL. */
5308 make_rtl_for_nonlocal_decl (tree decl, tree init, const char* asmspec)
5310 int toplev = toplevel_bindings_p ();
5312 const char *filename;
5314 /* Set the DECL_ASSEMBLER_NAME for the object. */
5317 /* The `register' keyword, when used together with an
5318 asm-specification, indicates that the variable should be
5319 placed in a particular register. */
5320 if (TREE_CODE (decl) == VAR_DECL && DECL_REGISTER (decl))
5322 set_user_assembler_name (decl, asmspec);
5323 DECL_HARD_REGISTER (decl) = 1;
5327 if (TREE_CODE (decl) == FUNCTION_DECL
5328 && DECL_BUILT_IN_CLASS (decl) == BUILT_IN_NORMAL)
5329 set_builtin_user_assembler_name (decl, asmspec);
5330 set_user_assembler_name (decl, asmspec);
5334 /* Handle non-variables up front. */
5335 if (TREE_CODE (decl) != VAR_DECL)
5337 rest_of_decl_compilation (decl, toplev, at_eof);
5341 /* If we see a class member here, it should be a static data
5343 if (DECL_LANG_SPECIFIC (decl) && DECL_IN_AGGR_P (decl))
5345 gcc_assert (TREE_STATIC (decl));
5346 /* An in-class declaration of a static data member should be
5347 external; it is only a declaration, and not a definition. */
5348 if (init == NULL_TREE)
5349 gcc_assert (DECL_EXTERNAL (decl) || !TREE_PUBLIC (decl));
5352 /* We don't create any RTL for local variables. */
5353 if (DECL_FUNCTION_SCOPE_P (decl) && !TREE_STATIC (decl))
5356 /* We defer emission of local statics until the corresponding
5357 DECL_EXPR is expanded. */
5358 defer_p = DECL_FUNCTION_SCOPE_P (decl) || DECL_VIRTUAL_P (decl);
5360 /* We try to defer namespace-scope static constants so that they are
5361 not emitted into the object file unnecessarily. */
5362 filename = input_filename;
5363 if (!DECL_VIRTUAL_P (decl)
5364 && TREE_READONLY (decl)
5365 && DECL_INITIAL (decl) != NULL_TREE
5366 && DECL_INITIAL (decl) != error_mark_node
5368 && ! EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl))
5370 && !TREE_PUBLIC (decl))
5372 /* Fool with the linkage of static consts according to #pragma
5374 struct c_fileinfo *finfo = get_fileinfo (filename);
5375 if (!finfo->interface_unknown && !TREE_PUBLIC (decl))
5377 TREE_PUBLIC (decl) = 1;
5378 DECL_EXTERNAL (decl) = finfo->interface_only;
5383 /* Likewise for template instantiations. */
5384 else if (DECL_LANG_SPECIFIC (decl)
5385 && DECL_IMPLICIT_INSTANTIATION (decl))
5388 /* If we're not deferring, go ahead and assemble the variable. */
5390 rest_of_decl_compilation (decl, toplev, at_eof);
5393 /* walk_tree helper for wrap_temporary_cleanups, below. */
5396 wrap_cleanups_r (tree *stmt_p, int *walk_subtrees, void *data)
5398 if (TYPE_P (*stmt_p))
5404 if (TREE_CODE (*stmt_p) == TARGET_EXPR)
5406 tree guard = (tree)data;
5407 tree tcleanup = TARGET_EXPR_CLEANUP (*stmt_p);
5409 tcleanup = build2 (TRY_CATCH_EXPR, void_type_node, tcleanup, guard);
5410 /* Tell honor_protect_cleanup_actions to handle this as a separate
5412 TRY_CATCH_IS_CLEANUP (tcleanup) = 1;
5414 TARGET_EXPR_CLEANUP (*stmt_p) = tcleanup;
5420 /* We're initializing a local variable which has a cleanup GUARD. If there
5421 are any temporaries used in the initializer INIT of this variable, we
5422 need to wrap their cleanups with TRY_CATCH_EXPR (, GUARD) so that the
5423 variable will be cleaned up properly if one of them throws.
5425 Unfortunately, there's no way to express this properly in terms of
5426 nesting, as the regions for the temporaries overlap the region for the
5427 variable itself; if there are two temporaries, the variable needs to be
5428 the first thing destroyed if either of them throws. However, we only
5429 want to run the variable's cleanup if it actually got constructed. So
5430 we need to guard the temporary cleanups with the variable's cleanup if
5431 they are run on the normal path, but not if they are run on the
5432 exceptional path. We implement this by telling
5433 honor_protect_cleanup_actions to strip the variable cleanup from the
5434 exceptional path. */
5437 wrap_temporary_cleanups (tree init, tree guard)
5439 cp_walk_tree_without_duplicates (&init, wrap_cleanups_r, (void *)guard);
5442 /* Generate code to initialize DECL (a local variable). */
5445 initialize_local_var (tree decl, tree init)
5447 tree type = TREE_TYPE (decl);
5451 gcc_assert (TREE_CODE (decl) == VAR_DECL
5452 || TREE_CODE (decl) == RESULT_DECL);
5453 gcc_assert (!TREE_STATIC (decl));
5455 if (DECL_SIZE (decl) == NULL_TREE)
5457 /* If we used it already as memory, it must stay in memory. */
5458 DECL_INITIAL (decl) = NULL_TREE;
5459 TREE_ADDRESSABLE (decl) = TREE_USED (decl);
5463 if (type == error_mark_node)
5466 /* Compute and store the initial value. */
5467 already_used = TREE_USED (decl) || TREE_USED (type);
5469 /* Generate a cleanup, if necessary. */
5470 cleanup = cxx_maybe_build_cleanup (decl);
5472 /* Perform the initialization. */
5475 int saved_stmts_are_full_exprs_p;
5477 /* If we're only initializing a single object, guard the destructors
5478 of any temporaries used in its initializer with its destructor.
5479 This isn't right for arrays because each element initialization is
5480 a full-expression. */
5481 if (cleanup && TREE_CODE (type) != ARRAY_TYPE)
5482 wrap_temporary_cleanups (init, cleanup);
5484 gcc_assert (building_stmt_tree ());
5485 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
5486 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
5487 finish_expr_stmt (init);
5488 current_stmt_tree ()->stmts_are_full_exprs_p =
5489 saved_stmts_are_full_exprs_p;
5492 /* Set this to 0 so we can tell whether an aggregate which was
5493 initialized was ever used. Don't do this if it has a
5494 destructor, so we don't complain about the 'resource
5495 allocation is initialization' idiom. Now set
5496 attribute((unused)) on types so decls of that type will be
5497 marked used. (see TREE_USED, above.) */
5498 if (TYPE_NEEDS_CONSTRUCTING (type)
5500 && TYPE_HAS_TRIVIAL_DESTRUCTOR (type)
5501 && DECL_NAME (decl))
5502 TREE_USED (decl) = 0;
5503 else if (already_used)
5504 TREE_USED (decl) = 1;
5507 finish_decl_cleanup (decl, cleanup);
5510 /* DECL is a VAR_DECL for a compiler-generated variable with static
5511 storage duration (like a virtual table) whose initializer is a
5512 compile-time constant. INIT must be either a TREE_LIST of values,
5513 or a CONSTRUCTOR. Initialize the variable and provide it to the
5517 initialize_artificial_var (tree decl, tree init)
5519 gcc_assert (DECL_ARTIFICIAL (decl));
5520 if (TREE_CODE (init) == TREE_LIST)
5521 init = build_constructor_from_list (TREE_TYPE (decl), init);
5522 gcc_assert (TREE_CODE (init) == CONSTRUCTOR);
5523 DECL_INITIAL (decl) = init;
5524 DECL_INITIALIZED_P (decl) = 1;
5525 determine_visibility (decl);
5526 layout_var_decl (decl);
5527 maybe_commonize_var (decl);
5528 make_rtl_for_nonlocal_decl (decl, init, /*asmspec=*/NULL);
5531 /* INIT is the initializer for a variable, as represented by the
5532 parser. Returns true iff INIT is value-dependent. */
5535 value_dependent_init_p (tree init)
5537 if (TREE_CODE (init) == TREE_LIST)
5538 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
5539 return any_value_dependent_elements_p (init);
5540 else if (TREE_CODE (init) == CONSTRUCTOR)
5541 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
5543 VEC(constructor_elt, gc) *elts;
5547 elts = CONSTRUCTOR_ELTS (init);
5548 nelts = VEC_length (constructor_elt, elts);
5549 for (i = 0; i < nelts; ++i)
5550 if (value_dependent_init_p (VEC_index (constructor_elt,
5555 /* It must be a simple expression, e.g., int i = 3; */
5556 return value_dependent_expression_p (init);
5561 /* Finish processing of a declaration;
5562 install its line number and initial value.
5563 If the length of an array type is not known before,
5564 it must be determined now, from the initial value, or it is an error.
5566 INIT is the initializer (if any) for DECL. If INIT_CONST_EXPR_P is
5567 true, then INIT is an integral constant expression.
5569 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
5570 if the (init) syntax was used. */
5573 cp_finish_decl (tree decl, tree init, bool init_const_expr_p,
5574 tree asmspec_tree, int flags)
5578 const char *asmspec = NULL;
5579 int was_readonly = 0;
5580 bool var_definition_p = false;
5581 int saved_processing_template_decl;
5584 if (decl == error_mark_node)
5589 error ("assignment (not initialization) in declaration");
5593 gcc_assert (TREE_CODE (decl) != RESULT_DECL);
5594 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
5595 gcc_assert (TREE_CODE (decl) != PARM_DECL);
5597 type = TREE_TYPE (decl);
5598 if (type == error_mark_node)
5601 /* Assume no cleanup is required. */
5602 cleanup = NULL_TREE;
5603 saved_processing_template_decl = processing_template_decl;
5605 /* If a name was specified, get the string. */
5606 if (global_scope_p (current_binding_level))
5607 asmspec_tree = maybe_apply_renaming_pragma (decl, asmspec_tree);
5608 if (asmspec_tree && asmspec_tree != error_mark_node)
5609 asmspec = TREE_STRING_POINTER (asmspec_tree);
5611 if (current_class_type
5612 && CP_DECL_CONTEXT (decl) == current_class_type
5613 && TYPE_BEING_DEFINED (current_class_type)
5614 && (DECL_INITIAL (decl) || init))
5615 DECL_INITIALIZED_IN_CLASS_P (decl) = 1;
5617 auto_node = type_uses_auto (type);
5620 if (init == NULL_TREE)
5622 error ("declaration of %q#D has no initializer", decl);
5623 TREE_TYPE (decl) = error_mark_node;
5626 if (TREE_CODE (init) == TREE_LIST)
5627 init = build_x_compound_expr_from_list (init, "initializer");
5628 if (describable_type (init))
5630 type = TREE_TYPE (decl) = do_auto_deduction (type, init, auto_node);
5631 if (type == error_mark_node)
5636 if (init && TREE_CODE (decl) == FUNCTION_DECL)
5639 if (init == ridpointers[(int)RID_DELETE])
5641 /* FIXME check this is 1st decl. */
5642 DECL_DELETED_FN (decl) = 1;
5643 DECL_DECLARED_INLINE_P (decl) = 1;
5644 DECL_INITIAL (decl) = error_mark_node;
5645 FOR_EACH_CLONE (clone, decl)
5647 DECL_DELETED_FN (clone) = 1;
5648 DECL_DECLARED_INLINE_P (clone) = 1;
5649 DECL_INITIAL (clone) = error_mark_node;
5653 else if (init == ridpointers[(int)RID_DEFAULT])
5655 if (defaultable_fn_check (decl))
5656 DECL_DEFAULTED_FN (decl) = 1;
5658 DECL_INITIAL (decl) = NULL_TREE;
5662 if (processing_template_decl)
5664 bool type_dependent_p;
5666 /* Add this declaration to the statement-tree. */
5667 if (at_function_scope_p ())
5668 add_decl_expr (decl);
5670 type_dependent_p = dependent_type_p (type);
5672 if (check_for_bare_parameter_packs (init))
5675 DECL_INITIAL (decl) = NULL_TREE;
5678 if (init && init_const_expr_p && TREE_CODE (decl) == VAR_DECL)
5680 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl) = 1;
5681 if (DECL_INTEGRAL_CONSTANT_VAR_P (decl))
5682 TREE_CONSTANT (decl) = 1;
5685 /* Generally, initializers in templates are expanded when the
5686 template is instantiated. But, if DECL is an integral
5687 constant static data member, then it can be used in future
5688 integral constant expressions, and its value must be
5691 && DECL_CLASS_SCOPE_P (decl)
5692 && DECL_INTEGRAL_CONSTANT_VAR_P (decl)
5693 && !type_dependent_p
5694 && !value_dependent_init_p (init)))
5697 DECL_INITIAL (decl) = init;
5698 if (TREE_CODE (decl) == VAR_DECL
5699 && !DECL_PRETTY_FUNCTION_P (decl)
5700 && !type_dependent_p)
5701 maybe_deduce_size_from_array_init (decl, init);
5705 if (TREE_CODE (init) == TREE_LIST)
5707 /* If the parenthesized-initializer form was used (e.g.,
5708 "int A<N>::i(X)"), then INIT will be a TREE_LIST of initializer
5709 arguments. (There is generally only one.) We convert them
5712 for (; list; list = TREE_CHAIN (list))
5714 tree elt = TREE_VALUE (list);
5715 TREE_VALUE (list) = fold_non_dependent_expr (elt);
5719 init = fold_non_dependent_expr (init);
5720 processing_template_decl = 0;
5723 /* Take care of TYPE_DECLs up front. */
5724 if (TREE_CODE (decl) == TYPE_DECL)
5726 if (type != error_mark_node
5727 && MAYBE_CLASS_TYPE_P (type) && DECL_NAME (decl))
5729 if (TREE_TYPE (DECL_NAME (decl)) && TREE_TYPE (decl) != type)
5730 warning (0, "shadowing previous type declaration of %q#D", decl);
5731 set_identifier_type_value (DECL_NAME (decl), decl);
5734 /* If we have installed this as the canonical typedef for this
5735 type, and that type has not been defined yet, delay emitting
5736 the debug information for it, as we will emit it later. */
5737 if (TYPE_MAIN_DECL (TREE_TYPE (decl)) == decl
5738 && !COMPLETE_TYPE_P (TREE_TYPE (decl)))
5739 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
5741 rest_of_decl_compilation (decl, DECL_CONTEXT (decl) == NULL_TREE,
5746 /* A reference will be modified here, as it is initialized. */
5747 if (! DECL_EXTERNAL (decl)
5748 && TREE_READONLY (decl)
5749 && TREE_CODE (type) == REFERENCE_TYPE)
5752 TREE_READONLY (decl) = 0;
5755 if (TREE_CODE (decl) == VAR_DECL)
5757 /* Only variables with trivial initialization and destruction can
5758 have thread-local storage. */
5759 if (DECL_THREAD_LOCAL_P (decl)
5760 && (type_has_nontrivial_default_init (TREE_TYPE (decl))
5761 || TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl))))
5762 error ("%qD cannot be thread-local because it has non-trivial "
5763 "type %qT", decl, TREE_TYPE (decl));
5764 /* If this is a local variable that will need a mangled name,
5765 register it now. We must do this before processing the
5766 initializer for the variable, since the initialization might
5767 require a guard variable, and since the mangled name of the
5768 guard variable will depend on the mangled name of this
5770 if (DECL_FUNCTION_SCOPE_P (decl)
5771 && TREE_STATIC (decl)
5772 && !DECL_ARTIFICIAL (decl))
5774 push_local_name (decl);
5775 if (DECL_CONSTRUCTOR_P (current_function_decl)
5776 || DECL_DESTRUCTOR_P (current_function_decl))
5777 /* Normally local_decls is populated during GIMPLE lowering,
5778 but [cd]tors are never actually compiled directly. We need
5779 to put statics on the list so we can deal with the label
5780 address extension. */
5781 cfun->local_decls = tree_cons (NULL_TREE, decl,
5785 /* Convert the initializer to the type of DECL, if we have not
5786 already initialized DECL. */
5787 if (!DECL_INITIALIZED_P (decl)
5788 /* If !DECL_EXTERNAL then DECL is being defined. In the
5789 case of a static data member initialized inside the
5790 class-specifier, there can be an initializer even if DECL
5791 is *not* defined. */
5792 && (!DECL_EXTERNAL (decl) || init))
5794 if (TYPE_FOR_JAVA (type) && MAYBE_CLASS_TYPE_P (type))
5797 = IDENTIFIER_GLOBAL_VALUE (get_identifier ("jclass"));
5798 /* Allow libjava/prims.cc define primitive classes. */
5799 if (init != NULL_TREE
5800 || jclass == NULL_TREE
5801 || TREE_CODE (jclass) != TYPE_DECL
5802 || !POINTER_TYPE_P (TREE_TYPE (jclass))
5803 || !same_type_ignoring_top_level_qualifiers_p
5804 (type, TREE_TYPE (TREE_TYPE (jclass))))
5805 error ("Java object %qD not allocated with %<new%>", decl);
5810 DECL_NONTRIVIALLY_INITIALIZED_P (decl) = 1;
5811 if (init_const_expr_p)
5813 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl) = 1;
5814 if (DECL_INTEGRAL_CONSTANT_VAR_P (decl))
5815 TREE_CONSTANT (decl) = 1;
5818 init = check_initializer (decl, init, flags, &cleanup);
5819 /* Thread-local storage cannot be dynamically initialized. */
5820 if (DECL_THREAD_LOCAL_P (decl) && init)
5822 error ("%qD is thread-local and so cannot be dynamically "
5823 "initialized", decl);
5827 /* Check that the initializer for a static data member was a
5828 constant. Although we check in the parser that the
5829 initializer is an integral constant expression, we do not
5830 simplify division-by-zero at the point at which it
5831 occurs. Therefore, in:
5833 struct S { static const int i = 7 / 0; };
5835 we issue an error at this point. It would
5836 probably be better to forbid division by zero in
5837 integral constant expressions. */
5838 if (DECL_EXTERNAL (decl) && init)
5840 error ("%qD cannot be initialized by a non-constant expression"
5841 " when being declared", decl);
5842 DECL_INITIALIZED_IN_CLASS_P (decl) = 0;
5850 The memory occupied by any object of static storage
5851 duration is zero-initialized at program startup before
5852 any other initialization takes place.
5854 We cannot create an appropriate initializer until after
5855 the type of DECL is finalized. If DECL_INITIAL is set,
5856 then the DECL is statically initialized, and any
5857 necessary zero-initialization has already been performed. */
5858 if (TREE_STATIC (decl) && !DECL_INITIAL (decl))
5859 DECL_INITIAL (decl) = build_zero_init (TREE_TYPE (decl),
5860 /*nelts=*/NULL_TREE,
5861 /*static_storage_p=*/true);
5862 /* Remember that the initialization for this variable has
5864 DECL_INITIALIZED_P (decl) = 1;
5865 /* This declaration is the definition of this variable,
5866 unless we are initializing a static data member within
5867 the class specifier. */
5868 if (!DECL_EXTERNAL (decl))
5869 var_definition_p = true;
5871 /* If the variable has an array type, lay out the type, even if
5872 there is no initializer. It is valid to index through the
5873 array, and we must get TYPE_ALIGN set correctly on the array
5875 else if (TREE_CODE (type) == ARRAY_TYPE)
5878 if (!processing_template_decl
5879 && TREE_STATIC (decl)
5880 && !at_function_scope_p ()
5881 && current_function_decl == NULL)
5882 /* So decl is a global variable or a static member of a
5883 non local class. Record the types it uses
5884 so that we can decide later to emit debug info for them. */
5885 record_types_used_by_current_var_decl (decl);
5887 else if (TREE_CODE (decl) == FIELD_DECL
5888 && TYPE_FOR_JAVA (type) && MAYBE_CLASS_TYPE_P (type))
5889 error ("non-static data member %qD has Java class type", decl);
5891 /* Add this declaration to the statement-tree. This needs to happen
5892 after the call to check_initializer so that the DECL_EXPR for a
5893 reference temp is added before the DECL_EXPR for the reference itself. */
5894 if (at_function_scope_p ())
5895 add_decl_expr (decl);
5897 /* Let the middle end know about variables and functions -- but not
5898 static data members in uninstantiated class templates. */
5899 if (!saved_processing_template_decl
5900 && (TREE_CODE (decl) == VAR_DECL
5901 || TREE_CODE (decl) == FUNCTION_DECL))
5903 if (TREE_CODE (decl) == VAR_DECL)
5905 layout_var_decl (decl);
5906 maybe_commonize_var (decl);
5909 /* This needs to happen after the linkage is set. */
5910 determine_visibility (decl);
5912 if (var_definition_p && TREE_STATIC (decl))
5914 /* If a TREE_READONLY variable needs initialization
5915 at runtime, it is no longer readonly and we need to
5916 avoid MEM_READONLY_P being set on RTL created for it. */
5919 if (TREE_READONLY (decl))
5920 TREE_READONLY (decl) = 0;
5923 else if (was_readonly)
5924 TREE_READONLY (decl) = 1;
5927 make_rtl_for_nonlocal_decl (decl, init, asmspec);
5929 /* Check for abstractness of the type. Notice that there is no
5930 need to strip array types here since the check for those types
5931 is already done within create_array_type_for_decl. */
5932 if (TREE_CODE (type) == FUNCTION_TYPE
5933 || TREE_CODE (type) == METHOD_TYPE)
5934 abstract_virtuals_error (decl, TREE_TYPE (type));
5936 abstract_virtuals_error (decl, type);
5938 if (TREE_TYPE (decl) == error_mark_node)
5939 /* No initialization required. */
5941 else if (TREE_CODE (decl) == FUNCTION_DECL)
5945 if (init == ridpointers[(int)RID_DEFAULT])
5947 /* An out-of-class default definition is defined at
5948 the point where it is explicitly defaulted. */
5949 if (DECL_INITIAL (decl) == error_mark_node)
5950 synthesize_method (decl);
5953 error ("function %q#D is initialized like a variable", decl);
5955 /* else no initialization required. */
5957 else if (DECL_EXTERNAL (decl)
5958 && ! (DECL_LANG_SPECIFIC (decl)
5959 && DECL_NOT_REALLY_EXTERN (decl)))
5962 DECL_INITIAL (decl) = init;
5964 /* A variable definition. */
5965 else if (DECL_FUNCTION_SCOPE_P (decl) && !TREE_STATIC (decl))
5966 /* Initialize the local variable. */
5967 initialize_local_var (decl, init);
5969 /* If a variable is defined, and then a subsequent
5970 definition with external linkage is encountered, we will
5971 get here twice for the same variable. We want to avoid
5972 calling expand_static_init more than once. For variables
5973 that are not static data members, we can call
5974 expand_static_init only when we actually process the
5975 initializer. It is not legal to redeclare a static data
5976 member, so this issue does not arise in that case. */
5977 else if (var_definition_p && TREE_STATIC (decl))
5978 expand_static_init (decl, init);
5981 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
5982 reference, insert it in the statement-tree now. */
5984 push_cleanup (decl, cleanup, false);
5987 processing_template_decl = saved_processing_template_decl;
5990 TREE_READONLY (decl) = 1;
5992 /* If this was marked 'used', be sure it will be output. */
5993 if (lookup_attribute ("used", DECL_ATTRIBUTES (decl)))
5994 mark_decl_referenced (decl);
5997 /* Returns a declaration for a VAR_DECL as if:
5999 extern "C" TYPE NAME;
6001 had been seen. Used to create compiler-generated global
6005 declare_global_var (tree name, tree type)
6009 push_to_top_level ();
6010 decl = build_decl (input_location, VAR_DECL, name, type);
6011 TREE_PUBLIC (decl) = 1;
6012 DECL_EXTERNAL (decl) = 1;
6013 DECL_ARTIFICIAL (decl) = 1;
6014 /* If the user has explicitly declared this variable (perhaps
6015 because the code we are compiling is part of a low-level runtime
6016 library), then it is possible that our declaration will be merged
6017 with theirs by pushdecl. */
6018 decl = pushdecl (decl);
6019 cp_finish_decl (decl, NULL_TREE, false, NULL_TREE, 0);
6020 pop_from_top_level ();
6025 /* Returns the type for the argument to "__cxa_atexit" (or "atexit",
6026 if "__cxa_atexit" is not being used) corresponding to the function
6027 to be called when the program exits. */
6030 get_atexit_fn_ptr_type (void)
6035 if (!atexit_fn_ptr_type_node)
6037 if (flag_use_cxa_atexit
6038 && !targetm.cxx.use_atexit_for_cxa_atexit ())
6039 /* The parameter to "__cxa_atexit" is "void (*)(void *)". */
6040 arg_types = tree_cons (NULL_TREE, ptr_type_node, void_list_node);
6042 /* The parameter to "atexit" is "void (*)(void)". */
6043 arg_types = void_list_node;
6045 fn_type = build_function_type (void_type_node, arg_types);
6046 atexit_fn_ptr_type_node = build_pointer_type (fn_type);
6049 return atexit_fn_ptr_type_node;
6052 /* Returns a pointer to the `atexit' function. Note that if
6053 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
6054 `__cxa_atexit' function specified in the IA64 C++ ABI. */
6057 get_atexit_node (void)
6064 bool use_aeabi_atexit;
6069 if (flag_use_cxa_atexit && !targetm.cxx.use_atexit_for_cxa_atexit ())
6071 /* The declaration for `__cxa_atexit' is:
6073 int __cxa_atexit (void (*)(void *), void *, void *)
6075 We build up the argument types and then then function type
6078 use_aeabi_atexit = targetm.cxx.use_aeabi_atexit ();
6079 /* First, build the pointer-to-function type for the first
6081 fn_ptr_type = get_atexit_fn_ptr_type ();
6082 /* Then, build the rest of the argument types. */
6083 arg_types = tree_cons (NULL_TREE, ptr_type_node, void_list_node);
6084 if (use_aeabi_atexit)
6086 arg_types = tree_cons (NULL_TREE, fn_ptr_type, arg_types);
6087 arg_types = tree_cons (NULL_TREE, ptr_type_node, arg_types);
6091 arg_types = tree_cons (NULL_TREE, ptr_type_node, arg_types);
6092 arg_types = tree_cons (NULL_TREE, fn_ptr_type, arg_types);
6094 /* And the final __cxa_atexit type. */
6095 fn_type = build_function_type (integer_type_node, arg_types);
6096 fn_ptr_type = build_pointer_type (fn_type);
6097 if (use_aeabi_atexit)
6098 name = "__aeabi_atexit";
6100 name = "__cxa_atexit";
6104 /* The declaration for `atexit' is:
6106 int atexit (void (*)());
6108 We build up the argument types and then then function type
6110 fn_ptr_type = get_atexit_fn_ptr_type ();
6111 arg_types = tree_cons (NULL_TREE, fn_ptr_type, void_list_node);
6112 /* Build the final atexit type. */
6113 fn_type = build_function_type (integer_type_node, arg_types);
6117 /* Now, build the function declaration. */
6118 push_lang_context (lang_name_c);
6119 atexit_fndecl = build_library_fn_ptr (name, fn_type);
6120 mark_used (atexit_fndecl);
6121 pop_lang_context ();
6122 atexit_node = decay_conversion (atexit_fndecl);
6127 /* Returns the __dso_handle VAR_DECL. */
6130 get_dso_handle_node (void)
6132 if (dso_handle_node)
6133 return dso_handle_node;
6135 /* Declare the variable. */
6136 dso_handle_node = declare_global_var (get_identifier ("__dso_handle"),
6139 return dso_handle_node;
6142 /* Begin a new function with internal linkage whose job will be simply
6143 to destroy some particular variable. */
6145 static GTY(()) int start_cleanup_cnt;
6148 start_cleanup_fn (void)
6153 bool use_cxa_atexit = flag_use_cxa_atexit
6154 && !targetm.cxx.use_atexit_for_cxa_atexit ();
6156 push_to_top_level ();
6158 /* No need to mangle this. */
6159 push_lang_context (lang_name_c);
6161 /* Build the name of the function. */
6162 sprintf (name, "__tcf_%d", start_cleanup_cnt++);
6163 /* Build the function declaration. */
6164 fntype = TREE_TYPE (get_atexit_fn_ptr_type ());
6165 fndecl = build_lang_decl (FUNCTION_DECL, get_identifier (name), fntype);
6166 /* It's a function with internal linkage, generated by the
6168 TREE_PUBLIC (fndecl) = 0;
6169 DECL_ARTIFICIAL (fndecl) = 1;
6170 /* Make the function `inline' so that it is only emitted if it is
6171 actually needed. It is unlikely that it will be inlined, since
6172 it is only called via a function pointer, but we avoid unnecessary
6173 emissions this way. */
6174 DECL_DECLARED_INLINE_P (fndecl) = 1;
6175 DECL_INTERFACE_KNOWN (fndecl) = 1;
6176 /* Build the parameter. */
6181 parmdecl = cp_build_parm_decl (NULL_TREE, ptr_type_node);
6182 DECL_CONTEXT (parmdecl) = fndecl;
6183 TREE_USED (parmdecl) = 1;
6184 DECL_ARGUMENTS (fndecl) = parmdecl;
6188 start_preparsed_function (fndecl, NULL_TREE, SF_PRE_PARSED);
6190 pop_lang_context ();
6192 return current_function_decl;
6195 /* Finish the cleanup function begun by start_cleanup_fn. */
6198 end_cleanup_fn (void)
6200 expand_or_defer_fn (finish_function (0));
6202 pop_from_top_level ();
6205 /* Generate code to handle the destruction of DECL, an object with
6206 static storage duration. */
6209 register_dtor_fn (tree decl)
6218 type = TREE_TYPE (decl);
6219 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (type))
6220 return void_zero_node;
6222 /* If we're using "__cxa_atexit" (or "__aeabi_atexit"), and DECL is
6223 a class object, we can just pass the destructor to
6224 "__cxa_atexit"; we don't have to build a temporary function to do
6226 use_dtor = (flag_use_cxa_atexit
6227 && !targetm.cxx.use_atexit_for_cxa_atexit ()
6228 && CLASS_TYPE_P (type));
6233 /* Find the destructor. */
6234 idx = lookup_fnfields_1 (type, complete_dtor_identifier);
6235 gcc_assert (idx >= 0);
6236 cleanup = VEC_index (tree, CLASSTYPE_METHOD_VEC (type), idx);
6237 /* Make sure it is accessible. */
6238 perform_or_defer_access_check (TYPE_BINFO (type), cleanup, cleanup);
6242 /* Call build_cleanup before we enter the anonymous function so
6243 that any access checks will be done relative to the current
6244 scope, rather than the scope of the anonymous function. */
6245 build_cleanup (decl);
6247 /* Now start the function. */
6248 cleanup = start_cleanup_fn ();
6250 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
6251 to the original function, rather than the anonymous one. That
6252 will make the back end think that nested functions are in use,
6253 which causes confusion. */
6254 push_deferring_access_checks (dk_no_check);
6255 fcall = build_cleanup (decl);
6256 pop_deferring_access_checks ();
6258 /* Create the body of the anonymous function. */
6259 compound_stmt = begin_compound_stmt (BCS_FN_BODY);
6260 finish_expr_stmt (fcall);
6261 finish_compound_stmt (compound_stmt);
6265 /* Call atexit with the cleanup function. */
6266 mark_used (cleanup);
6267 cleanup = build_address (cleanup);
6268 if (flag_use_cxa_atexit && !targetm.cxx.use_atexit_for_cxa_atexit ())
6274 /* We must convert CLEANUP to the type that "__cxa_atexit"
6276 cleanup = build_nop (get_atexit_fn_ptr_type (), cleanup);
6277 /* "__cxa_atexit" will pass the address of DECL to the
6278 cleanup function. */
6280 addr = build_address (decl);
6281 /* The declared type of the parameter to "__cxa_atexit" is
6282 "void *". For plain "T*", we could just let the
6283 machinery in cp_build_function_call convert it -- but if the
6284 type is "cv-qualified T *", then we need to convert it
6285 before passing it in, to avoid spurious errors. */
6286 addr = build_nop (ptr_type_node, addr);
6289 /* Since the cleanup functions we build ignore the address
6290 they're given, there's no reason to pass the actual address
6291 in, and, in general, it's cheaper to pass NULL than any
6293 addr = null_pointer_node;
6294 args = tree_cons (NULL_TREE,
6295 cp_build_unary_op (ADDR_EXPR, get_dso_handle_node (), 0,
6296 tf_warning_or_error),
6298 if (targetm.cxx.use_aeabi_atexit ())
6300 args = tree_cons (NULL_TREE, cleanup, args);
6301 args = tree_cons (NULL_TREE, addr, args);
6305 args = tree_cons (NULL_TREE, addr, args);
6306 args = tree_cons (NULL_TREE, cleanup, args);
6310 args = tree_cons (NULL_TREE, cleanup, NULL_TREE);
6311 return cp_build_function_call (get_atexit_node (), args,
6312 tf_warning_or_error);
6315 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
6316 is its initializer. Generate code to handle the construction
6317 and destruction of DECL. */
6320 expand_static_init (tree decl, tree init)
6322 gcc_assert (TREE_CODE (decl) == VAR_DECL);
6323 gcc_assert (TREE_STATIC (decl));
6325 /* Some variables require no initialization. */
6327 && !TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl))
6328 && TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
6331 if (DECL_FUNCTION_SCOPE_P (decl))
6333 /* Emit code to perform this initialization but once. */
6334 tree if_stmt = NULL_TREE, inner_if_stmt = NULL_TREE;
6335 tree then_clause = NULL_TREE, inner_then_clause = NULL_TREE;
6336 tree guard, guard_addr;
6337 tree acquire_fn, release_fn, abort_fn;
6340 /* Emit code to perform this initialization but once. This code
6343 static <type> guard;
6344 if (!guard.first_byte) {
6345 if (__cxa_guard_acquire (&guard)) {
6348 // Do initialization.
6349 flag = true; __cxa_guard_release (&guard);
6350 // Register variable for destruction at end of program.
6352 if (!flag) __cxa_guard_abort (&guard);
6356 Note that the `flag' variable is only set to 1 *after* the
6357 initialization is complete. This ensures that an exception,
6358 thrown during the construction, will cause the variable to
6359 reinitialized when we pass through this code again, as per:
6363 If the initialization exits by throwing an exception, the
6364 initialization is not complete, so it will be tried again
6365 the next time control enters the declaration.
6367 This process should be thread-safe, too; multiple threads
6368 should not be able to initialize the variable more than
6371 /* Create the guard variable. */
6372 guard = get_guard (decl);
6374 /* This optimization isn't safe on targets with relaxed memory
6375 consistency. On such targets we force synchronization in
6376 __cxa_guard_acquire. */
6377 if (!targetm.relaxed_ordering || !flag_threadsafe_statics)
6379 /* Begin the conditional initialization. */
6380 if_stmt = begin_if_stmt ();
6381 finish_if_stmt_cond (get_guard_cond (guard), if_stmt);
6382 then_clause = begin_compound_stmt (BCS_NO_SCOPE);
6385 if (flag_threadsafe_statics)
6387 guard_addr = build_address (guard);
6389 acquire_fn = get_identifier ("__cxa_guard_acquire");
6390 release_fn = get_identifier ("__cxa_guard_release");
6391 abort_fn = get_identifier ("__cxa_guard_abort");
6392 if (!get_global_value_if_present (acquire_fn, &acquire_fn))
6394 tree argtypes = tree_cons (NULL_TREE, TREE_TYPE (guard_addr),
6396 tree vfntype = build_function_type (void_type_node, argtypes);
6397 acquire_fn = push_library_fn
6398 (acquire_fn, build_function_type (integer_type_node, argtypes),
6400 release_fn = push_library_fn (release_fn, vfntype, NULL_TREE);
6401 abort_fn = push_library_fn (abort_fn, vfntype, NULL_TREE);
6405 release_fn = identifier_global_value (release_fn);
6406 abort_fn = identifier_global_value (abort_fn);
6409 inner_if_stmt = begin_if_stmt ();
6410 finish_if_stmt_cond (build_call_n (acquire_fn, 1, guard_addr),
6413 inner_then_clause = begin_compound_stmt (BCS_NO_SCOPE);
6414 begin = get_target_expr (boolean_false_node);
6415 flag = TARGET_EXPR_SLOT (begin);
6417 TARGET_EXPR_CLEANUP (begin)
6418 = build3 (COND_EXPR, void_type_node, flag,
6420 build_call_n (abort_fn, 1, guard_addr));
6421 CLEANUP_EH_ONLY (begin) = 1;
6423 /* Do the initialization itself. */
6424 init = add_stmt_to_compound (begin, init);
6425 init = add_stmt_to_compound
6426 (init, build2 (MODIFY_EXPR, void_type_node, flag, boolean_true_node));
6427 init = add_stmt_to_compound
6428 (init, build_call_n (release_fn, 1, guard_addr));
6431 init = add_stmt_to_compound (init, set_guard (guard));
6433 /* Use atexit to register a function for destroying this static
6435 init = add_stmt_to_compound (init, register_dtor_fn (decl));
6437 finish_expr_stmt (init);
6439 if (flag_threadsafe_statics)
6441 finish_compound_stmt (inner_then_clause);
6442 finish_then_clause (inner_if_stmt);
6443 finish_if_stmt (inner_if_stmt);
6446 if (!targetm.relaxed_ordering || !flag_threadsafe_statics)
6448 finish_compound_stmt (then_clause);
6449 finish_then_clause (if_stmt);
6450 finish_if_stmt (if_stmt);
6454 static_aggregates = tree_cons (init, decl, static_aggregates);
6458 /* Make TYPE a complete type based on INITIAL_VALUE.
6459 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
6460 2 if there was no information (in which case assume 0 if DO_DEFAULT),
6461 3 if the initializer list is empty (in pedantic mode). */
6464 cp_complete_array_type (tree *ptype, tree initial_value, bool do_default)
6467 tree type, elt_type;
6471 unsigned HOST_WIDE_INT i;
6474 /* An array of character type can be initialized from a
6475 brace-enclosed string constant.
6477 FIXME: this code is duplicated from reshape_init. Probably
6478 we should just call reshape_init here? */
6479 if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (*ptype)))
6480 && TREE_CODE (initial_value) == CONSTRUCTOR
6481 && !VEC_empty (constructor_elt, CONSTRUCTOR_ELTS (initial_value)))
6483 VEC(constructor_elt,gc) *v = CONSTRUCTOR_ELTS (initial_value);
6484 tree value = VEC_index (constructor_elt, v, 0)->value;
6486 if (TREE_CODE (value) == STRING_CST
6487 && VEC_length (constructor_elt, v) == 1)
6488 initial_value = value;
6491 /* If any of the elements are parameter packs, we can't actually
6492 complete this type now because the array size is dependent. */
6493 if (TREE_CODE (initial_value) == CONSTRUCTOR)
6495 FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (initial_value),
6498 if (PACK_EXPANSION_P (value))
6504 failure = complete_array_type (ptype, initial_value, do_default);
6506 /* We can create the array before the element type is complete, which
6507 means that we didn't have these two bits set in the original type
6508 either. In completing the type, we are expected to propagate these
6509 bits. See also complete_type which does the same thing for arrays
6512 if (TYPE_DOMAIN (type))
6514 elt_type = TREE_TYPE (type);
6515 TYPE_NEEDS_CONSTRUCTING (type) = TYPE_NEEDS_CONSTRUCTING (elt_type);
6516 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type)
6517 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (elt_type);
6523 /* Return zero if something is declared to be a member of type
6524 CTYPE when in the context of CUR_TYPE. STRING is the error
6525 message to print in that case. Otherwise, quietly return 1. */
6528 member_function_or_else (tree ctype, tree cur_type, enum overload_flags flags)
6530 if (ctype && ctype != cur_type)
6532 if (flags == DTOR_FLAG)
6533 error ("destructor for alien class %qT cannot be a member", ctype);
6535 error ("constructor for alien class %qT cannot be a member", ctype);
6541 /* Subroutine of `grokdeclarator'. */
6543 /* Generate errors possibly applicable for a given set of specifiers.
6544 This is for ARM $7.1.2. */
6547 bad_specifiers (tree object,
6556 error ("%qD declared as a %<virtual%> %s", object, type);
6558 error ("%qD declared as an %<inline%> %s", object, type);
6560 error ("%<const%> and %<volatile%> function specifiers on "
6561 "%qD invalid in %s declaration",
6564 error ("%q+D declared as a friend", object);
6566 && (TREE_CODE (object) == TYPE_DECL
6567 || (!TYPE_PTRFN_P (TREE_TYPE (object))
6568 && !TYPE_REFFN_P (TREE_TYPE (object))
6569 && !TYPE_PTRMEMFUNC_P (TREE_TYPE (object)))))
6570 error ("%q+D declared with an exception specification", object);
6573 /* DECL is a member function or static data member and is presently
6574 being defined. Check that the definition is taking place in a
6578 check_class_member_definition_namespace (tree decl)
6580 /* These checks only apply to member functions and static data
6582 gcc_assert (TREE_CODE (decl) == FUNCTION_DECL
6583 || TREE_CODE (decl) == VAR_DECL);
6584 /* We check for problems with specializations in pt.c in
6585 check_specialization_namespace, where we can issue better
6587 if (processing_specialization)
6589 /* There are no restrictions on the placement of
6590 explicit instantiations. */
6591 if (processing_explicit_instantiation)
6595 A member function definition that appears outside of the
6596 class definition shall appear in a namespace scope enclosing
6597 the class definition.
6601 The definition for a static data member shall appear in a
6602 namespace scope enclosing the member's class definition. */
6603 if (!is_ancestor (current_namespace, DECL_CONTEXT (decl)))
6604 permerror (input_location, "definition of %qD is not in namespace enclosing %qT",
6605 decl, DECL_CONTEXT (decl));
6608 /* Build a PARM_DECL for the "this" parameter. TYPE is the
6609 METHOD_TYPE for a non-static member function; QUALS are the
6610 cv-qualifiers that apply to the function. */
6613 build_this_parm (tree type, cp_cv_quals quals)
6618 cp_cv_quals this_quals;
6620 this_type = TREE_VALUE (TYPE_ARG_TYPES (type));
6621 /* The `this' parameter is implicitly `const'; it cannot be
6623 this_quals = (quals & TYPE_QUAL_RESTRICT) | TYPE_QUAL_CONST;
6624 qual_type = cp_build_qualified_type (this_type, this_quals);
6625 parm = build_artificial_parm (this_identifier, qual_type);
6626 cp_apply_type_quals_to_decl (this_quals, parm);
6630 /* CTYPE is class type, or null if non-class.
6631 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
6633 DECLARATOR is the function's name.
6634 PARMS is a chain of PARM_DECLs for the function.
6635 VIRTUALP is truthvalue of whether the function is virtual or not.
6636 FLAGS are to be passed through to `grokclassfn'.
6637 QUALS are qualifiers indicating whether the function is `const'
6639 RAISES is a list of exceptions that this function can raise.
6640 CHECK is 1 if we must find this method in CTYPE, 0 if we should
6641 not look, and -1 if we should not call `grokclassfn' at all.
6643 SFK is the kind of special function (if any) for the new function.
6645 Returns `NULL_TREE' if something goes wrong, after issuing
6646 applicable error messages. */
6649 grokfndecl (tree ctype,
6653 tree orig_declarator,
6655 enum overload_flags flags,
6662 special_function_kind sfk,
6667 location_t location)
6670 int staticp = ctype && TREE_CODE (type) == FUNCTION_TYPE;
6674 type = build_exception_variant (type, raises);
6676 decl = build_lang_decl (FUNCTION_DECL, declarator, type);
6678 /* If we have an explicit location, use it, otherwise use whatever
6679 build_lang_decl used (probably input_location). */
6680 if (location != UNKNOWN_LOCATION)
6681 DECL_SOURCE_LOCATION (decl) = location;
6683 if (TREE_CODE (type) == METHOD_TYPE)
6686 parm = build_this_parm (type, quals);
6687 TREE_CHAIN (parm) = parms;
6690 DECL_ARGUMENTS (decl) = parms;
6691 for (t = parms; t; t = TREE_CHAIN (t))
6692 DECL_CONTEXT (t) = decl;
6693 /* Propagate volatile out from type to decl. */
6694 if (TYPE_VOLATILE (type))
6695 TREE_THIS_VOLATILE (decl) = 1;
6697 /* Setup decl according to sfk. */
6700 case sfk_constructor:
6701 case sfk_copy_constructor:
6702 case sfk_move_constructor:
6703 DECL_CONSTRUCTOR_P (decl) = 1;
6705 case sfk_destructor:
6706 DECL_DESTRUCTOR_P (decl) = 1;
6712 /* If pointers to member functions use the least significant bit to
6713 indicate whether a function is virtual, ensure a pointer
6714 to this function will have that bit clear. */
6715 if (TARGET_PTRMEMFUNC_VBIT_LOCATION == ptrmemfunc_vbit_in_pfn
6716 && TREE_CODE (type) == METHOD_TYPE
6717 && DECL_ALIGN (decl) < 2 * BITS_PER_UNIT)
6718 DECL_ALIGN (decl) = 2 * BITS_PER_UNIT;
6721 && TREE_CODE (orig_declarator) == TEMPLATE_ID_EXPR)
6725 ("defining explicit specialization %qD in friend declaration",
6729 tree fns = TREE_OPERAND (orig_declarator, 0);
6730 tree args = TREE_OPERAND (orig_declarator, 1);
6732 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
6734 /* Something like `template <class T> friend void f<T>()'. */
6735 error ("invalid use of template-id %qD in declaration "
6736 "of primary template",
6742 /* A friend declaration of the form friend void f<>(). Record
6743 the information in the TEMPLATE_ID_EXPR. */
6744 SET_DECL_IMPLICIT_INSTANTIATION (decl);
6746 if (TREE_CODE (fns) == COMPONENT_REF)
6748 /* Due to bison parser ickiness, we will have already looked
6749 up an operator_name or PFUNCNAME within the current class
6750 (see template_id in parse.y). If the current class contains
6751 such a name, we'll get a COMPONENT_REF here. Undo that. */
6753 gcc_assert (TREE_TYPE (TREE_OPERAND (fns, 0))
6754 == current_class_type);
6755 fns = TREE_OPERAND (fns, 1);
6757 gcc_assert (TREE_CODE (fns) == IDENTIFIER_NODE
6758 || TREE_CODE (fns) == OVERLOAD);
6759 DECL_TEMPLATE_INFO (decl) = build_template_info (fns, args);
6761 for (t = TYPE_ARG_TYPES (TREE_TYPE (decl)); t; t = TREE_CHAIN (t))
6762 if (TREE_PURPOSE (t)
6763 && TREE_CODE (TREE_PURPOSE (t)) == DEFAULT_ARG)
6765 error ("default arguments are not allowed in declaration "
6766 "of friend template specialization %qD",
6773 error ("%<inline%> is not allowed in declaration of friend "
6774 "template specialization %qD",
6781 /* If this decl has namespace scope, set that up. */
6783 set_decl_namespace (decl, in_namespace, friendp);
6785 DECL_CONTEXT (decl) = FROB_CONTEXT (current_decl_namespace ());
6787 /* `main' and builtins have implicit 'C' linkage. */
6788 if ((MAIN_NAME_P (declarator)
6789 || (IDENTIFIER_LENGTH (declarator) > 10
6790 && IDENTIFIER_POINTER (declarator)[0] == '_'
6791 && IDENTIFIER_POINTER (declarator)[1] == '_'
6792 && strncmp (IDENTIFIER_POINTER (declarator)+2, "builtin_", 8) == 0))
6793 && current_lang_name == lang_name_cplusplus
6794 && ctype == NULL_TREE
6795 /* NULL_TREE means global namespace. */
6796 && DECL_CONTEXT (decl) == NULL_TREE)
6797 SET_DECL_LANGUAGE (decl, lang_c);
6799 /* Should probably propagate const out from type to decl I bet (mrs). */
6802 DECL_STATIC_FUNCTION_P (decl) = 1;
6803 DECL_CONTEXT (decl) = ctype;
6808 DECL_CONTEXT (decl) = ctype;
6810 check_class_member_definition_namespace (decl);
6813 if (ctype == NULL_TREE && DECL_MAIN_P (decl))
6815 if (processing_template_decl)
6816 error ("cannot declare %<::main%> to be a template");
6818 error ("cannot declare %<::main%> to be inline");
6820 error ("cannot declare %<::main%> to be static");
6825 /* Members of anonymous types and local classes have no linkage; make
6826 them internal. If a typedef is made later, this will be changed. */
6827 if (ctype && (TYPE_ANONYMOUS_P (ctype)
6828 || decl_function_context (TYPE_MAIN_DECL (ctype))))
6831 if (publicp && cxx_dialect == cxx98)
6833 /* [basic.link]: A name with no linkage (notably, the name of a class
6834 or enumeration declared in a local scope) shall not be used to
6835 declare an entity with linkage.
6837 DR 757 relaxes this restriction for C++0x. */
6838 t = no_linkage_check (TREE_TYPE (decl),
6839 /*relaxed_p=*/false);
6842 if (TYPE_ANONYMOUS_P (t))
6844 if (DECL_EXTERN_C_P (decl))
6845 /* Allow this; it's pretty common in C. */;
6848 permerror (input_location, "anonymous type with no linkage "
6849 "used to declare function %q#D with linkage",
6851 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
6852 permerror (input_location, "%q+#D does not refer to the unqualified "
6853 "type, so it is not used for linkage",
6858 permerror (input_location, "type %qT with no linkage used to "
6859 "declare function %q#D with linkage", t, decl);
6863 TREE_PUBLIC (decl) = publicp;
6866 DECL_INTERFACE_KNOWN (decl) = 1;
6867 DECL_NOT_REALLY_EXTERN (decl) = 1;
6870 /* If the declaration was declared inline, mark it as such. */
6872 DECL_DECLARED_INLINE_P (decl) = 1;
6874 DECL_EXTERNAL (decl) = 1;
6875 if (quals && TREE_CODE (type) == FUNCTION_TYPE)
6878 ? G_("static member function %qD cannot have cv-qualifier")
6879 : G_("non-member function %qD cannot have cv-qualifier"),
6881 quals = TYPE_UNQUALIFIED;
6884 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl))
6885 && !grok_op_properties (decl, /*complain=*/true))
6889 /* Make the init_value nonzero so pushdecl knows this is not
6890 tentative. error_mark_node is replaced later with the BLOCK. */
6891 DECL_INITIAL (decl) = error_mark_node;
6893 if (TYPE_NOTHROW_P (type) || nothrow_libfn_p (decl))
6894 TREE_NOTHROW (decl) = 1;
6896 /* Caller will do the rest of this. */
6900 if (ctype != NULL_TREE)
6901 grokclassfn (ctype, decl, flags);
6903 decl = check_explicit_specialization (orig_declarator, decl,
6906 4 * (friendp != 0));
6907 if (decl == error_mark_node)
6912 cplus_decl_attributes (&decl, *attrlist, 0);
6913 *attrlist = NULL_TREE;
6916 /* Check main's type after attributes have been applied. */
6917 if (ctype == NULL_TREE && DECL_MAIN_P (decl))
6919 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl)),
6922 tree oldtypeargs = TYPE_ARG_TYPES (TREE_TYPE (decl));
6924 error ("%<::main%> must return %<int%>");
6925 newtype = build_function_type (integer_type_node, oldtypeargs);
6926 TREE_TYPE (decl) = newtype;
6929 check_main_parameter_types (decl);
6932 if (ctype != NULL_TREE
6933 && (! TYPE_FOR_JAVA (ctype) || check_java_method (decl))
6936 tree old_decl = check_classfn (ctype, decl,
6937 (processing_template_decl
6938 > template_class_depth (ctype))
6939 ? current_template_parms
6942 if (old_decl == error_mark_node)
6950 if (TREE_CODE (old_decl) == TEMPLATE_DECL)
6951 /* Because grokfndecl is always supposed to return a
6952 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
6953 here. We depend on our callers to figure out that its
6954 really a template that's being returned. */
6955 old_decl = DECL_TEMPLATE_RESULT (old_decl);
6957 if (DECL_STATIC_FUNCTION_P (old_decl)
6958 && TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE)
6959 /* Remove the `this' parm added by grokclassfn.
6960 XXX Isn't this done in start_function, too? */
6961 revert_static_member_fn (decl);
6962 if (DECL_ARTIFICIAL (old_decl))
6964 error ("definition of implicitly-declared %qD", old_decl);
6968 /* Since we've smashed OLD_DECL to its
6969 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
6970 if (TREE_CODE (decl) == TEMPLATE_DECL)
6971 decl = DECL_TEMPLATE_RESULT (decl);
6973 /* Attempt to merge the declarations. This can fail, in
6974 the case of some invalid specialization declarations. */
6975 pushed_scope = push_scope (ctype);
6976 ok = duplicate_decls (decl, old_decl, friendp);
6978 pop_scope (pushed_scope);
6981 error ("no %q#D member function declared in class %qT",
6989 if (DECL_CONSTRUCTOR_P (decl) && !grok_ctor_properties (ctype, decl))
6992 if (ctype == NULL_TREE || check)
6996 DECL_VIRTUAL_P (decl) = 1;
7001 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
7002 the linkage that DECL will receive in the object file. */
7005 set_linkage_for_static_data_member (tree decl)
7007 /* A static data member always has static storage duration and
7008 external linkage. Note that static data members are forbidden in
7009 local classes -- the only situation in which a class has
7010 non-external linkage. */
7011 TREE_PUBLIC (decl) = 1;
7012 TREE_STATIC (decl) = 1;
7013 /* For non-template classes, static data members are always put
7014 out in exactly those files where they are defined, just as
7015 with ordinary namespace-scope variables. */
7016 if (!processing_template_decl)
7017 DECL_INTERFACE_KNOWN (decl) = 1;
7020 /* Create a VAR_DECL named NAME with the indicated TYPE.
7022 If SCOPE is non-NULL, it is the class type or namespace containing
7023 the variable. If SCOPE is NULL, the variable should is created in
7024 the innermost enclosings scope. */
7027 grokvardecl (tree type,
7029 const cp_decl_specifier_seq *declspecs,
7035 tree explicit_scope;
7037 gcc_assert (!name || TREE_CODE (name) == IDENTIFIER_NODE);
7039 /* Compute the scope in which to place the variable, but remember
7040 whether or not that scope was explicitly specified by the user. */
7041 explicit_scope = scope;
7044 /* An explicit "extern" specifier indicates a namespace-scope
7046 if (declspecs->storage_class == sc_extern)
7047 scope = current_decl_namespace ();
7048 else if (!at_function_scope_p ())
7049 scope = current_scope ();
7053 && (/* If the variable is a namespace-scope variable declared in a
7054 template, we need DECL_LANG_SPECIFIC. */
7055 (TREE_CODE (scope) == NAMESPACE_DECL && processing_template_decl)
7056 /* Similarly for namespace-scope variables with language linkage
7058 || (TREE_CODE (scope) == NAMESPACE_DECL
7059 && current_lang_name != lang_name_cplusplus)
7060 /* Similarly for static data members. */
7062 decl = build_lang_decl (VAR_DECL, name, type);
7064 decl = build_decl (input_location, VAR_DECL, name, type);
7066 if (explicit_scope && TREE_CODE (explicit_scope) == NAMESPACE_DECL)
7067 set_decl_namespace (decl, explicit_scope, 0);
7069 DECL_CONTEXT (decl) = FROB_CONTEXT (scope);
7071 if (declspecs->storage_class == sc_extern)
7073 DECL_THIS_EXTERN (decl) = 1;
7074 DECL_EXTERNAL (decl) = !initialized;
7077 if (DECL_CLASS_SCOPE_P (decl))
7079 set_linkage_for_static_data_member (decl);
7080 /* This function is only called with out-of-class definitions. */
7081 DECL_EXTERNAL (decl) = 0;
7082 check_class_member_definition_namespace (decl);
7084 /* At top level, either `static' or no s.c. makes a definition
7085 (perhaps tentative), and absence of `static' makes it public. */
7086 else if (toplevel_bindings_p ())
7088 TREE_PUBLIC (decl) = (declspecs->storage_class != sc_static
7089 && (DECL_THIS_EXTERN (decl) || ! constp));
7090 TREE_STATIC (decl) = ! DECL_EXTERNAL (decl);
7092 /* Not at top level, only `static' makes a static definition. */
7095 TREE_STATIC (decl) = declspecs->storage_class == sc_static;
7096 TREE_PUBLIC (decl) = DECL_EXTERNAL (decl);
7099 if (declspecs->specs[(int)ds_thread])
7100 DECL_TLS_MODEL (decl) = decl_default_tls_model (decl);
7102 /* If the type of the decl has no linkage, make sure that we'll
7103 notice that in mark_used. */
7104 if (cxx_dialect > cxx98
7105 && decl_linkage (decl) != lk_none
7106 && DECL_LANG_SPECIFIC (decl) == NULL
7107 && !DECL_EXTERN_C_P (decl)
7108 && no_linkage_check (TREE_TYPE (decl), /*relaxed_p=*/false))
7109 retrofit_lang_decl (decl);
7111 if (TREE_PUBLIC (decl))
7113 /* [basic.link]: A name with no linkage (notably, the name of a class
7114 or enumeration declared in a local scope) shall not be used to
7115 declare an entity with linkage.
7117 DR 757 relaxes this restriction for C++0x. */
7118 tree t = (cxx_dialect > cxx98 ? NULL_TREE
7119 : no_linkage_check (TREE_TYPE (decl), /*relaxed_p=*/false));
7122 if (TYPE_ANONYMOUS_P (t))
7124 if (DECL_EXTERN_C_P (decl))
7125 /* Allow this; it's pretty common in C. */
7129 /* DRs 132, 319 and 389 seem to indicate types with
7130 no linkage can only be used to declare extern "C"
7131 entities. Since it's not always an error in the
7132 ISO C++ 90 Standard, we only issue a warning. */
7133 warning (0, "anonymous type with no linkage used to declare "
7134 "variable %q#D with linkage", decl);
7135 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
7136 warning (0, "%q+#D does not refer to the unqualified "
7137 "type, so it is not used for linkage",
7142 warning (0, "type %qT with no linkage used to declare variable "
7143 "%q#D with linkage", t, decl);
7147 DECL_INTERFACE_KNOWN (decl) = 1;
7152 /* Create and return a canonical pointer to member function type, for
7153 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
7156 build_ptrmemfunc_type (tree type)
7160 tree unqualified_variant = NULL_TREE;
7162 if (type == error_mark_node)
7165 /* If a canonical type already exists for this type, use it. We use
7166 this method instead of type_hash_canon, because it only does a
7167 simple equality check on the list of field members. */
7169 if ((t = TYPE_GET_PTRMEMFUNC_TYPE (type)))
7172 /* Make sure that we always have the unqualified pointer-to-member
7174 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
7176 = build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type));
7178 t = make_class_type (RECORD_TYPE);
7179 xref_basetypes (t, NULL_TREE);
7181 /* Let the front end know this is a pointer to member function... */
7182 TYPE_PTRMEMFUNC_FLAG (t) = 1;
7183 /* ... and not really a class type. */
7184 SET_CLASS_TYPE_P (t, 0);
7186 field = build_decl (input_location, FIELD_DECL, pfn_identifier, type);
7189 field = build_decl (input_location, FIELD_DECL, delta_identifier,
7191 TREE_CHAIN (field) = fields;
7194 finish_builtin_struct (t, "__ptrmemfunc_type", fields, ptr_type_node);
7196 /* Zap out the name so that the back end will give us the debugging
7197 information for this anonymous RECORD_TYPE. */
7198 TYPE_NAME (t) = NULL_TREE;
7200 /* If this is not the unqualified form of this pointer-to-member
7201 type, set the TYPE_MAIN_VARIANT for this type to be the
7202 unqualified type. Since they are actually RECORD_TYPEs that are
7203 not variants of each other, we must do this manually.
7204 As we just built a new type there is no need to do yet another copy. */
7205 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
7207 int type_quals = cp_type_quals (type);
7208 TYPE_READONLY (t) = (type_quals & TYPE_QUAL_CONST) != 0;
7209 TYPE_VOLATILE (t) = (type_quals & TYPE_QUAL_VOLATILE) != 0;
7210 TYPE_RESTRICT (t) = (type_quals & TYPE_QUAL_RESTRICT) != 0;
7211 TYPE_MAIN_VARIANT (t) = unqualified_variant;
7212 TYPE_NEXT_VARIANT (t) = TYPE_NEXT_VARIANT (unqualified_variant);
7213 TYPE_NEXT_VARIANT (unqualified_variant) = t;
7214 TREE_TYPE (TYPE_BINFO (t)) = t;
7217 /* Cache this pointer-to-member type so that we can find it again
7219 TYPE_SET_PTRMEMFUNC_TYPE (type, t);
7221 if (TYPE_STRUCTURAL_EQUALITY_P (type))
7222 SET_TYPE_STRUCTURAL_EQUALITY (t);
7223 else if (TYPE_CANONICAL (type) != type)
7224 TYPE_CANONICAL (t) = build_ptrmemfunc_type (TYPE_CANONICAL (type));
7229 /* Create and return a pointer to data member type. */
7232 build_ptrmem_type (tree class_type, tree member_type)
7234 if (TREE_CODE (member_type) == METHOD_TYPE)
7236 tree arg_types = TYPE_ARG_TYPES (member_type);
7237 cp_cv_quals quals = cp_type_quals (TREE_TYPE (TREE_VALUE (arg_types)));
7238 member_type = build_memfn_type (member_type, class_type, quals);
7239 return build_ptrmemfunc_type (build_pointer_type (member_type));
7243 gcc_assert (TREE_CODE (member_type) != FUNCTION_TYPE);
7244 return build_offset_type (class_type, member_type);
7248 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
7249 Check to see that the definition is valid. Issue appropriate error
7250 messages. Return 1 if the definition is particularly bad, or 0
7254 check_static_variable_definition (tree decl, tree type)
7256 /* Motion 10 at San Diego: If a static const integral data member is
7257 initialized with an integral constant expression, the initializer
7258 may appear either in the declaration (within the class), or in
7259 the definition, but not both. If it appears in the class, the
7260 member is a member constant. The file-scope definition is always
7262 if (!ARITHMETIC_TYPE_P (type) && TREE_CODE (type) != ENUMERAL_TYPE)
7264 error ("invalid in-class initialization of static data member "
7265 "of non-integral type %qT",
7267 /* If we just return the declaration, crashes will sometimes
7268 occur. We therefore return void_type_node, as if this were a
7269 friend declaration, to cause callers to completely ignore
7270 this declaration. */
7273 else if (!CP_TYPE_CONST_P (type))
7274 error ("ISO C++ forbids in-class initialization of non-const "
7275 "static member %qD",
7277 else if (!INTEGRAL_OR_ENUMERATION_TYPE_P (type))
7278 pedwarn (input_location, OPT_pedantic, "ISO C++ forbids initialization of member constant "
7279 "%qD of non-integral type %qT", decl, type);
7284 /* Given the SIZE (i.e., number of elements) in an array, compute an
7285 appropriate index type for the array. If non-NULL, NAME is the
7286 name of the thing being declared. */
7289 compute_array_index_type (tree name, tree size)
7293 tree abi_1_itype = NULL_TREE;
7295 if (error_operand_p (size))
7296 return error_mark_node;
7298 type = TREE_TYPE (size);
7299 /* The array bound must be an integer type. */
7300 if (!dependent_type_p (type) && !INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type))
7303 error ("size of array %qD has non-integral type %qT", name, type);
7305 error ("size of array has non-integral type %qT", type);
7306 size = integer_one_node;
7307 type = TREE_TYPE (size);
7310 /* We can only call value_dependent_expression_p on integral constant
7311 expressions; the parser adds a dummy NOP_EXPR with TREE_SIDE_EFFECTS
7312 set if this isn't one. */
7313 if (processing_template_decl
7314 && (TREE_SIDE_EFFECTS (size) || value_dependent_expression_p (size)))
7316 /* We cannot do any checking for a SIZE that isn't known to be
7317 constant. Just build the index type and mark that it requires
7318 structural equality checks. */
7319 itype = build_index_type (build_min (MINUS_EXPR, sizetype,
7320 size, integer_one_node));
7321 TYPE_DEPENDENT_P (itype) = 1;
7322 TYPE_DEPENDENT_P_VALID (itype) = 1;
7323 SET_TYPE_STRUCTURAL_EQUALITY (itype);
7327 if (!abi_version_at_least (2) && processing_template_decl)
7328 /* For abi-1, we handled all instances in templates the same way,
7329 even when they were non-dependent. This affects the manglings
7330 produced. So, we do the normal checking for non-dependent
7331 sizes, but at the end we'll return the same type that abi-1
7332 would have, but with TYPE_CANONICAL set to the "right"
7333 value that the current ABI would provide. */
7334 abi_1_itype = build_index_type (build_min (MINUS_EXPR, sizetype,
7335 size, integer_one_node));
7337 /* The size might be the result of a cast. */
7338 STRIP_TYPE_NOPS (size);
7340 /* It might be a const variable or enumeration constant. */
7341 size = integral_constant_value (size);
7342 if (error_operand_p (size))
7343 return error_mark_node;
7345 /* Normally, the array-bound will be a constant. */
7346 if (TREE_CODE (size) == INTEGER_CST)
7348 /* Check to see if the array bound overflowed. Make that an
7349 error, no matter how generous we're being. */
7350 constant_expression_error (size);
7352 /* An array must have a positive number of elements. */
7353 if (INT_CST_LT (size, integer_zero_node))
7356 error ("size of array %qD is negative", name);
7358 error ("size of array is negative");
7359 size = integer_one_node;
7361 /* As an extension we allow zero-sized arrays. We always allow
7362 them in system headers because glibc uses them. */
7363 else if (integer_zerop (size) && !in_system_header)
7366 pedwarn (input_location, OPT_pedantic, "ISO C++ forbids zero-size array %qD", name);
7368 pedwarn (input_location, OPT_pedantic, "ISO C++ forbids zero-size array");
7371 else if (TREE_CONSTANT (size))
7373 /* `(int) &fn' is not a valid array bound. */
7375 error ("size of array %qD is not an integral constant-expression",
7378 error ("size of array is not an integral constant-expression");
7379 size = integer_one_node;
7381 else if (pedantic && warn_vla != 0)
7384 pedwarn (input_location, OPT_Wvla, "ISO C++ forbids variable length array %qD", name);
7386 pedwarn (input_location, OPT_Wvla, "ISO C++ forbids variable length array");
7388 else if (warn_vla > 0)
7392 "variable length array %qD is used", name);
7395 "variable length array is used");
7398 if (processing_template_decl && !TREE_CONSTANT (size))
7399 /* A variable sized array. */
7400 itype = build_min (MINUS_EXPR, sizetype, size, integer_one_node);
7403 HOST_WIDE_INT saved_processing_template_decl;
7405 /* Compute the index of the largest element in the array. It is
7406 one less than the number of elements in the array. We save
7407 and restore PROCESSING_TEMPLATE_DECL so that computations in
7408 cp_build_binary_op will be appropriately folded. */
7409 saved_processing_template_decl = processing_template_decl;
7410 processing_template_decl = 0;
7411 itype = cp_build_binary_op (input_location,
7413 cp_convert (ssizetype, size),
7414 cp_convert (ssizetype, integer_one_node),
7415 tf_warning_or_error);
7416 itype = fold (itype);
7417 processing_template_decl = saved_processing_template_decl;
7419 if (!TREE_CONSTANT (itype))
7420 /* A variable sized array. */
7421 itype = variable_size (itype);
7422 /* Make sure that there was no overflow when creating to a signed
7423 index type. (For example, on a 32-bit machine, an array with
7424 size 2^32 - 1 is too big.) */
7425 else if (TREE_CODE (itype) == INTEGER_CST
7426 && TREE_OVERFLOW (itype))
7428 error ("overflow in array dimension");
7429 TREE_OVERFLOW (itype) = 0;
7433 /* Create and return the appropriate index type. */
7436 tree t = build_index_type (itype);
7437 TYPE_CANONICAL (abi_1_itype) = TYPE_CANONICAL (t);
7441 return build_index_type (itype);
7444 /* Returns the scope (if any) in which the entity declared by
7445 DECLARATOR will be located. If the entity was declared with an
7446 unqualified name, NULL_TREE is returned. */
7449 get_scope_of_declarator (const cp_declarator *declarator)
7451 while (declarator && declarator->kind != cdk_id)
7452 declarator = declarator->declarator;
7454 /* If the declarator-id is a SCOPE_REF, the scope in which the
7455 declaration occurs is the first operand. */
7457 && declarator->u.id.qualifying_scope)
7458 return declarator->u.id.qualifying_scope;
7460 /* Otherwise, the declarator is not a qualified name; the entity will
7461 be declared in the current scope. */
7465 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
7466 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
7470 create_array_type_for_decl (tree name, tree type, tree size)
7472 tree itype = NULL_TREE;
7474 /* If things have already gone awry, bail now. */
7475 if (type == error_mark_node || size == error_mark_node)
7476 return error_mark_node;
7478 /* If there are some types which cannot be array elements,
7479 issue an error-message and return. */
7480 switch (TREE_CODE (type))
7484 error ("declaration of %qD as array of void", name);
7486 error ("creating array of void");
7487 return error_mark_node;
7491 error ("declaration of %qD as array of functions", name);
7493 error ("creating array of functions");
7494 return error_mark_node;
7496 case REFERENCE_TYPE:
7498 error ("declaration of %qD as array of references", name);
7500 error ("creating array of references");
7501 return error_mark_node;
7505 error ("declaration of %qD as array of function members", name);
7507 error ("creating array of function members");
7508 return error_mark_node;
7516 The constant expressions that specify the bounds of the arrays
7517 can be omitted only for the first member of the sequence. */
7518 if (TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type))
7521 error ("declaration of %qD as multidimensional array must "
7522 "have bounds for all dimensions except the first",
7525 error ("multidimensional array must have bounds for all "
7526 "dimensions except the first");
7528 return error_mark_node;
7531 /* Figure out the index type for the array. */
7533 itype = compute_array_index_type (name, size);
7536 T is called the array element type; this type shall not be [...] an
7537 abstract class type. */
7538 abstract_virtuals_error (name, type);
7540 return build_cplus_array_type (type, itype);
7543 /* Check that it's OK to declare a function with the indicated TYPE.
7544 SFK indicates the kind of special function (if any) that this
7545 function is. OPTYPE is the type given in a conversion operator
7546 declaration, or the class type for a constructor/destructor.
7547 Returns the actual return type of the function; that
7548 may be different than TYPE if an error occurs, or for certain
7549 special functions. */
7552 check_special_function_return_type (special_function_kind sfk,
7558 case sfk_constructor:
7560 error ("return type specification for constructor invalid");
7562 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
7563 type = build_pointer_type (optype);
7565 type = void_type_node;
7568 case sfk_destructor:
7570 error ("return type specification for destructor invalid");
7571 /* We can't use the proper return type here because we run into
7572 problems with ambiguous bases and covariant returns.
7573 Java classes are left unchanged because (void *) isn't a valid
7574 Java type, and we don't want to change the Java ABI. */
7575 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
7576 type = build_pointer_type (void_type_node);
7578 type = void_type_node;
7581 case sfk_conversion:
7583 error ("return type specified for %<operator %T%>", optype);
7594 /* A variable or data member (whose unqualified name is IDENTIFIER)
7595 has been declared with the indicated TYPE. If the TYPE is not
7596 acceptable, issue an error message and return a type to use for
7597 error-recovery purposes. */
7600 check_var_type (tree identifier, tree type)
7602 if (VOID_TYPE_P (type))
7605 error ("unnamed variable or field declared void");
7606 else if (TREE_CODE (identifier) == IDENTIFIER_NODE)
7608 gcc_assert (!IDENTIFIER_OPNAME_P (identifier));
7609 error ("variable or field %qE declared void", identifier);
7612 error ("variable or field declared void");
7613 type = error_mark_node;
7619 /* Given declspecs and a declarator (abstract or otherwise), determine
7620 the name and type of the object declared and construct a DECL node
7623 DECLSPECS points to the representation of declaration-specifier
7624 sequence that precedes declarator.
7626 DECL_CONTEXT says which syntactic context this declaration is in:
7627 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
7628 FUNCDEF for a function definition. Like NORMAL but a few different
7629 error messages in each case. Return value may be zero meaning
7630 this definition is too screwy to try to parse.
7631 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
7632 handle member functions (which have FIELD context).
7633 Return value may be zero meaning this definition is too screwy to
7635 PARM for a parameter declaration (either within a function prototype
7636 or before a function body). Make a PARM_DECL, or return void_type_node.
7637 TPARM for a template parameter declaration.
7638 CATCHPARM for a parameter declaration before a catch clause.
7639 TYPENAME if for a typename (in a cast or sizeof).
7640 Don't make a DECL node; just return the ..._TYPE node.
7641 FIELD for a struct or union field; make a FIELD_DECL.
7642 BITFIELD for a field with specified width.
7644 INITIALIZED is as for start_decl.
7646 ATTRLIST is a pointer to the list of attributes, which may be NULL
7647 if there are none; *ATTRLIST may be modified if attributes from inside
7648 the declarator should be applied to the declaration.
7650 When this function is called, scoping variables (such as
7651 CURRENT_CLASS_TYPE) should reflect the scope in which the
7652 declaration occurs, not the scope in which the new declaration will
7653 be placed. For example, on:
7657 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
7660 Returns a DECL (if a declarator is present), a TYPE (if there is no
7661 declarator, in cases like "struct S;"), or the ERROR_MARK_NODE if an
7665 grokdeclarator (const cp_declarator *declarator,
7666 const cp_decl_specifier_seq *declspecs,
7667 enum decl_context decl_context,
7671 tree type = NULL_TREE;
7673 int virtualp, explicitp, friendp, inlinep, staticp;
7674 int explicit_int = 0;
7675 int explicit_char = 0;
7676 int defaulted_int = 0;
7677 tree dependent_name = NULL_TREE;
7679 tree typedef_decl = NULL_TREE;
7680 const char *name = NULL;
7681 tree typedef_type = NULL_TREE;
7682 /* True if this declarator is a function definition. */
7683 bool funcdef_flag = false;
7684 cp_declarator_kind innermost_code = cdk_error;
7687 /* See the code below that used this. */
7688 tree decl_attr = NULL_TREE;
7691 /* Keep track of what sort of function is being processed
7692 so that we can warn about default return values, or explicit
7693 return values which do not match prescribed defaults. */
7694 special_function_kind sfk = sfk_none;
7696 tree dname = NULL_TREE;
7697 tree ctor_return_type = NULL_TREE;
7698 enum overload_flags flags = NO_SPECIAL;
7699 /* cv-qualifiers that apply to the declarator, for a declaration of
7700 a member function. */
7701 cp_cv_quals memfn_quals = TYPE_UNQUALIFIED;
7702 /* cv-qualifiers that apply to the type specified by the DECLSPECS. */
7704 tree raises = NULL_TREE;
7705 int template_count = 0;
7706 tree returned_attrs = NULL_TREE;
7707 tree parms = NULL_TREE;
7708 const cp_declarator *id_declarator;
7709 /* The unqualified name of the declarator; either an
7710 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
7711 tree unqualified_id;
7712 /* The class type, if any, in which this entity is located,
7713 or NULL_TREE if none. Note that this value may be different from
7714 the current class type; for example if an attempt is made to declare
7715 "A::f" inside "B", this value will be "A". */
7716 tree ctype = current_class_type;
7717 /* The NAMESPACE_DECL for the namespace in which this entity is
7718 located. If an unqualified name is used to declare the entity,
7719 this value will be NULL_TREE, even if the entity is located at
7721 tree in_namespace = NULL_TREE;
7722 cp_storage_class storage_class;
7723 bool unsigned_p, signed_p, short_p, long_p, thread_p;
7724 bool type_was_error_mark_node = false;
7725 bool parameter_pack_p = declarator? declarator->parameter_pack_p : false;
7726 bool template_type_arg = false;
7727 bool template_parm_flag = false;
7728 bool constexpr_p = declspecs->specs[(int) ds_constexpr];
7731 signed_p = declspecs->specs[(int)ds_signed];
7732 unsigned_p = declspecs->specs[(int)ds_unsigned];
7733 short_p = declspecs->specs[(int)ds_short];
7734 long_p = declspecs->specs[(int)ds_long];
7735 longlong = declspecs->specs[(int)ds_long] >= 2;
7736 thread_p = declspecs->specs[(int)ds_thread];
7738 if (decl_context == FUNCDEF)
7739 funcdef_flag = true, decl_context = NORMAL;
7740 else if (decl_context == MEMFUNCDEF)
7741 funcdef_flag = true, decl_context = FIELD;
7742 else if (decl_context == BITFIELD)
7743 bitfield = 1, decl_context = FIELD;
7744 else if (decl_context == TEMPLATE_TYPE_ARG)
7745 template_type_arg = true, decl_context = TYPENAME;
7746 else if (decl_context == TPARM)
7747 template_parm_flag = true, decl_context = PARM;
7749 if (initialized > 1)
7750 funcdef_flag = true;
7752 /* Look inside a declarator for the name being declared
7753 and get it as a string, for an error message. */
7754 for (id_declarator = declarator;
7756 id_declarator = id_declarator->declarator)
7758 if (id_declarator->kind != cdk_id)
7759 innermost_code = id_declarator->kind;
7761 switch (id_declarator->kind)
7764 if (id_declarator->declarator
7765 && id_declarator->declarator->kind == cdk_id)
7767 sfk = id_declarator->declarator->u.id.sfk;
7768 if (sfk == sfk_destructor)
7775 tree qualifying_scope = id_declarator->u.id.qualifying_scope;
7776 tree decl = id_declarator->u.id.unqualified_name;
7779 if (qualifying_scope)
7781 if (at_function_scope_p ())
7785 A declarator-id shall not be qualified except
7788 None of the cases are permitted in block
7790 if (qualifying_scope == global_namespace)
7791 error ("invalid use of qualified-name %<::%D%>",
7793 else if (TYPE_P (qualifying_scope))
7794 error ("invalid use of qualified-name %<%T::%D%>",
7795 qualifying_scope, decl);
7797 error ("invalid use of qualified-name %<%D::%D%>",
7798 qualifying_scope, decl);
7799 return error_mark_node;
7801 else if (TYPE_P (qualifying_scope))
7803 ctype = qualifying_scope;
7804 if (innermost_code != cdk_function
7805 && current_class_type
7806 && !UNIQUELY_DERIVED_FROM_P (ctype,
7807 current_class_type))
7809 error ("type %qT is not derived from type %qT",
7810 ctype, current_class_type);
7811 return error_mark_node;
7814 else if (TREE_CODE (qualifying_scope) == NAMESPACE_DECL)
7815 in_namespace = qualifying_scope;
7817 switch (TREE_CODE (decl))
7823 if (innermost_code != cdk_function)
7825 error ("declaration of %qD as non-function", decl);
7826 return error_mark_node;
7828 else if (!qualifying_scope
7829 && !(current_class_type && at_class_scope_p ()))
7831 error ("declaration of %qD as non-member", decl);
7832 return error_mark_node;
7835 type = TREE_OPERAND (decl, 0);
7837 type = constructor_name (type);
7838 name = identifier_to_locale (IDENTIFIER_POINTER (type));
7843 case TEMPLATE_ID_EXPR:
7845 tree fns = TREE_OPERAND (decl, 0);
7848 if (TREE_CODE (dname) != IDENTIFIER_NODE)
7850 gcc_assert (is_overloaded_fn (dname));
7851 dname = DECL_NAME (get_first_fn (dname));
7856 case IDENTIFIER_NODE:
7857 if (TREE_CODE (decl) == IDENTIFIER_NODE)
7860 if (C_IS_RESERVED_WORD (dname))
7862 error ("declarator-id missing; using reserved word %qD",
7864 name = identifier_to_locale (IDENTIFIER_POINTER (dname));
7866 else if (!IDENTIFIER_TYPENAME_P (dname))
7867 name = identifier_to_locale (IDENTIFIER_POINTER (dname));
7870 gcc_assert (flags == NO_SPECIAL);
7871 flags = TYPENAME_FLAG;
7872 ctor_return_type = TREE_TYPE (dname);
7873 sfk = sfk_conversion;
7874 if (is_typename_at_global_scope (dname))
7875 name = identifier_to_locale (IDENTIFIER_POINTER (dname));
7877 name = "<invalid operator>";
7894 return error_mark_node;
7899 if (id_declarator->kind == cdk_id)
7905 The declarator in a function-definition shall have the form
7906 D1 ( parameter-declaration-clause) ... */
7907 if (funcdef_flag && innermost_code != cdk_function)
7909 error ("function definition does not declare parameters");
7910 return error_mark_node;
7913 if (((dname && IDENTIFIER_OPNAME_P (dname)) || flags == TYPENAME_FLAG)
7914 && innermost_code != cdk_function
7915 && ! (ctype && !declspecs->any_specifiers_p))
7917 error ("declaration of %qD as non-function", dname);
7918 return error_mark_node;
7921 /* Anything declared one level down from the top level
7922 must be one of the parameters of a function
7923 (because the body is at least two levels down). */
7925 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
7926 by not allowing C++ class definitions to specify their parameters
7927 with xdecls (must be spec.d in the parmlist).
7929 Since we now wait to push a class scope until we are sure that
7930 we are in a legitimate method context, we must set oldcname
7931 explicitly (since current_class_name is not yet alive).
7933 We also want to avoid calling this a PARM if it is in a namespace. */
7935 if (decl_context == NORMAL && !toplevel_bindings_p ())
7937 struct cp_binding_level *b = current_binding_level;
7938 current_binding_level = b->level_chain;
7939 if (current_binding_level != 0 && toplevel_bindings_p ())
7940 decl_context = PARM;
7941 current_binding_level = b;
7945 name = decl_context == PARM ? "parameter" : "type name";
7947 /* If there were multiple types specified in the decl-specifier-seq,
7948 issue an error message. */
7949 if (declspecs->multiple_types_p)
7951 error ("two or more data types in declaration of %qs", name);
7952 return error_mark_node;
7955 if (declspecs->conflicting_specifiers_p)
7957 error ("conflicting specifiers in declaration of %qs", name);
7958 return error_mark_node;
7961 /* Extract the basic type from the decl-specifier-seq. */
7962 type = declspecs->type;
7963 if (type == error_mark_node)
7966 type_was_error_mark_node = true;
7968 /* If the entire declaration is itself tagged as deprecated then
7969 suppress reports of deprecated items. */
7970 if (type && TREE_DEPRECATED (type)
7971 && deprecated_state != DEPRECATED_SUPPRESS)
7972 warn_deprecated_use (type, NULL_TREE);
7973 if (type && TREE_CODE (type) == TYPE_DECL)
7975 typedef_decl = type;
7976 type = TREE_TYPE (typedef_decl);
7977 if (TREE_DEPRECATED (type)
7978 && DECL_ARTIFICIAL (typedef_decl)
7979 && deprecated_state != DEPRECATED_SUPPRESS)
7980 warn_deprecated_use (type, NULL_TREE);
7982 /* No type at all: default to `int', and set DEFAULTED_INT
7983 because it was not a user-defined typedef. */
7984 if (type == NULL_TREE && (signed_p || unsigned_p || long_p || short_p))
7986 /* These imply 'int'. */
7987 type = integer_type_node;
7991 explicit_int = declspecs->explicit_int_p;
7992 explicit_char = declspecs->explicit_char_p;
7995 /* See the code below that used this. */
7997 decl_attr = DECL_ATTRIBUTES (typedef_decl);
7999 typedef_type = type;
8002 if (sfk != sfk_conversion)
8003 ctor_return_type = ctype;
8005 if (sfk != sfk_none)
8006 type = check_special_function_return_type (sfk, type,
8008 else if (type == NULL_TREE)
8014 /* We handle `main' specially here, because 'main () { }' is so
8015 common. With no options, it is allowed. With -Wreturn-type,
8016 it is a warning. It is only an error with -pedantic-errors. */
8017 is_main = (funcdef_flag
8018 && dname && MAIN_NAME_P (dname)
8019 && ctype == NULL_TREE
8020 && in_namespace == NULL_TREE
8021 && current_namespace == global_namespace);
8023 if (type_was_error_mark_node)
8024 /* We've already issued an error, don't complain more. */;
8025 else if (in_system_header || flag_ms_extensions)
8026 /* Allow it, sigh. */;
8028 permerror (input_location, "ISO C++ forbids declaration of %qs with no type", name);
8030 pedwarn (input_location, OPT_pedantic,
8031 "ISO C++ forbids declaration of %qs with no type", name);
8033 warning (OPT_Wreturn_type,
8034 "ISO C++ forbids declaration of %qs with no type", name);
8036 type = integer_type_node;
8041 /* Now process the modifiers that were specified
8042 and check for invalid combinations. */
8044 /* Long double is a special combination. */
8045 if (long_p && !longlong && TYPE_MAIN_VARIANT (type) == double_type_node)
8048 type = build_qualified_type (long_double_type_node,
8049 cp_type_quals (type));
8052 /* Check all other uses of type modifiers. */
8054 if (unsigned_p || signed_p || long_p || short_p)
8058 if ((signed_p || unsigned_p) && TREE_CODE (type) != INTEGER_TYPE)
8059 error ("%<signed%> or %<unsigned%> invalid for %qs", name);
8060 else if (signed_p && unsigned_p)
8061 error ("%<signed%> and %<unsigned%> specified together for %qs", name);
8062 else if (longlong && TREE_CODE (type) != INTEGER_TYPE)
8063 error ("%<long long%> invalid for %qs", name);
8064 else if (long_p && TREE_CODE (type) == REAL_TYPE)
8065 error ("%<long%> invalid for %qs", name);
8066 else if (short_p && TREE_CODE (type) == REAL_TYPE)
8067 error ("%<short%> invalid for %qs", name);
8068 else if ((long_p || short_p) && TREE_CODE (type) != INTEGER_TYPE)
8069 error ("%<long%> or %<short%> invalid for %qs", name);
8070 else if ((long_p || short_p) && explicit_char)
8071 error ("%<long%> or %<short%> specified with char for %qs", name);
8072 else if (long_p && short_p)
8073 error ("%<long%> and %<short%> specified together for %qs", name);
8074 else if (type == char16_type_node || type == char32_type_node)
8076 if (signed_p || unsigned_p)
8077 error ("%<signed%> or %<unsigned%> invalid for %qs", name);
8078 else if (short_p || long_p)
8079 error ("%<short%> or %<long%> invalid for %qs", name);
8084 if (!explicit_int && !defaulted_int && !explicit_char && pedantic)
8086 pedwarn (input_location, OPT_pedantic,
8087 "long, short, signed or unsigned used invalidly for %qs",
8089 if (flag_pedantic_errors)
8094 /* Discard the type modifiers if they are invalid. */
8105 /* Decide whether an integer type is signed or not.
8106 Optionally treat bitfields as signed by default. */
8110 It is implementation-defined whether a plain (neither
8111 explicitly signed or unsigned) char, short, int, or long
8112 bit-field is signed or unsigned.
8114 Naturally, we extend this to long long as well. Note that
8115 this does not include wchar_t. */
8116 || (bitfield && !flag_signed_bitfields
8118 /* A typedef for plain `int' without `signed' can be
8119 controlled just like plain `int', but a typedef for
8120 `signed int' cannot be so controlled. */
8122 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl))
8123 && TREE_CODE (type) == INTEGER_TYPE
8124 && !same_type_p (TYPE_MAIN_VARIANT (type), wchar_type_node)))
8127 type = long_long_unsigned_type_node;
8129 type = long_unsigned_type_node;
8131 type = short_unsigned_type_node;
8132 else if (type == char_type_node)
8133 type = unsigned_char_type_node;
8134 else if (typedef_decl)
8135 type = unsigned_type_for (type);
8137 type = unsigned_type_node;
8139 else if (signed_p && type == char_type_node)
8140 type = signed_char_type_node;
8142 type = long_long_integer_type_node;
8144 type = long_integer_type_node;
8146 type = short_integer_type_node;
8148 if (declspecs->specs[(int)ds_complex])
8150 if (TREE_CODE (type) != INTEGER_TYPE && TREE_CODE (type) != REAL_TYPE)
8151 error ("complex invalid for %qs", name);
8152 /* If we just have "complex", it is equivalent to
8153 "complex double", but if any modifiers at all are specified it is
8154 the complex form of TYPE. E.g, "complex short" is
8155 "complex short int". */
8157 else if (defaulted_int && ! longlong
8158 && ! (long_p || short_p || signed_p || unsigned_p))
8159 type = complex_double_type_node;
8160 else if (type == integer_type_node)
8161 type = complex_integer_type_node;
8162 else if (type == float_type_node)
8163 type = complex_float_type_node;
8164 else if (type == double_type_node)
8165 type = complex_double_type_node;
8166 else if (type == long_double_type_node)
8167 type = complex_long_double_type_node;
8169 type = build_complex_type (type);
8172 type_quals = TYPE_UNQUALIFIED;
8173 if (declspecs->specs[(int)ds_const])
8174 type_quals |= TYPE_QUAL_CONST;
8175 /* A `constexpr' specifier used in an object declaration declares
8176 the object as `const'. */
8179 if (innermost_code == cdk_function)
8181 else if (declspecs->specs[(int)ds_const] != 0)
8182 error ("both %<const%> and %<constexpr%> cannot be used here");
8184 type_quals |= TYPE_QUAL_CONST;
8186 if (declspecs->specs[(int)ds_volatile])
8187 type_quals |= TYPE_QUAL_VOLATILE;
8188 if (declspecs->specs[(int)ds_restrict])
8189 type_quals |= TYPE_QUAL_RESTRICT;
8190 if (sfk == sfk_conversion && type_quals != TYPE_UNQUALIFIED)
8191 error ("qualifiers are not allowed on declaration of %<operator %T%>",
8194 if (TREE_CODE (type) == FUNCTION_TYPE
8195 && type_quals != TYPE_UNQUALIFIED)
8197 /* This was an error in C++98 (cv-qualifiers cannot be added to
8198 a function type), but DR 295 makes the code well-formed by
8199 dropping the extra qualifiers. */
8200 if (pedantic && cxx_dialect == cxx98)
8202 tree bad_type = build_qualified_type (type, type_quals);
8203 pedwarn (input_location, OPT_pedantic,
8204 "ignoring %qV qualifiers added to function type %qT",
8207 type_quals = TYPE_UNQUALIFIED;
8209 type_quals |= cp_type_quals (type);
8210 type = cp_build_qualified_type_real
8211 (type, type_quals, ((typedef_decl && !DECL_ARTIFICIAL (typedef_decl)
8212 ? tf_ignore_bad_quals : 0) | tf_warning_or_error));
8213 /* We might have ignored or rejected some of the qualifiers. */
8214 type_quals = cp_type_quals (type);
8217 inlinep = !! declspecs->specs[(int)ds_inline];
8218 virtualp = !! declspecs->specs[(int)ds_virtual];
8219 explicitp = !! declspecs->specs[(int)ds_explicit];
8221 storage_class = declspecs->storage_class;
8222 if (storage_class == sc_static)
8223 staticp = 1 + (decl_context == FIELD);
8225 if (virtualp && staticp == 2)
8227 error ("member %qD cannot be declared both virtual and static", dname);
8228 storage_class = sc_none;
8231 friendp = !! declspecs->specs[(int)ds_friend];
8233 if (dependent_name && !friendp)
8235 error ("%<%T::%D%> is not a valid declarator", ctype, dependent_name);
8236 return error_mark_node;
8239 /* Issue errors about use of storage classes for parameters. */
8240 if (decl_context == PARM)
8242 if (declspecs->specs[(int)ds_typedef])
8244 error ("typedef declaration invalid in parameter declaration");
8245 return error_mark_node;
8247 else if (template_parm_flag && storage_class != sc_none)
8249 error ("storage class specified for template parameter %qs", name);
8250 return error_mark_node;
8252 else if (storage_class == sc_static
8253 || storage_class == sc_extern
8255 error ("storage class specifiers invalid in parameter declarations");
8257 if (type_uses_auto (type))
8259 error ("parameter declared %<auto%>");
8260 type = error_mark_node;
8263 /* Function parameters cannot be constexpr. If we saw one, moan
8264 and pretend it wasn't there. */
8267 error ("a parameter cannot be declared %<constexpr%>");
8272 /* Give error if `virtual' is used outside of class declaration. */
8274 && (current_class_name == NULL_TREE || decl_context != FIELD))
8276 error ("%<virtual%> outside class declaration");
8280 /* Static anonymous unions are dealt with here. */
8281 if (staticp && decl_context == TYPENAME
8283 && ANON_AGGR_TYPE_P (declspecs->type))
8284 decl_context = FIELD;
8286 /* Warn about storage classes that are invalid for certain
8287 kinds of declarations (parameters, typenames, etc.). */
8290 && storage_class != sc_extern
8291 && storage_class != sc_static)
8292 || declspecs->specs[(int)ds_typedef]))
8294 error ("multiple storage classes in declaration of %qs", name);
8297 if (decl_context != NORMAL
8298 && ((storage_class != sc_none
8299 && storage_class != sc_mutable)
8302 if ((decl_context == PARM || decl_context == CATCHPARM)
8303 && (storage_class == sc_register
8304 || storage_class == sc_auto))
8306 else if (declspecs->specs[(int)ds_typedef])
8308 else if (decl_context == FIELD
8309 /* C++ allows static class elements. */
8310 && storage_class == sc_static)
8311 /* C++ also allows inlines and signed and unsigned elements,
8312 but in those cases we don't come in here. */
8316 if (decl_context == FIELD)
8317 error ("storage class specified for %qs", name);
8320 if (decl_context == PARM || decl_context == CATCHPARM)
8321 error ("storage class specified for parameter %qs", name);
8323 error ("storage class specified for typename");
8325 if (storage_class == sc_register
8326 || storage_class == sc_auto
8327 || storage_class == sc_extern
8329 storage_class = sc_none;
8332 else if (storage_class == sc_extern && funcdef_flag
8333 && ! toplevel_bindings_p ())
8334 error ("nested function %qs declared %<extern%>", name);
8335 else if (toplevel_bindings_p ())
8337 if (storage_class == sc_auto)
8338 error ("top-level declaration of %qs specifies %<auto%>", name);
8341 && storage_class != sc_extern
8342 && storage_class != sc_static)
8344 error ("function-scope %qs implicitly auto and declared %<__thread%>",
8349 if (storage_class && friendp)
8351 error ("storage class specifiers invalid in friend function declarations");
8352 storage_class = sc_none;
8357 unqualified_id = NULL_TREE;
8360 unqualified_id = id_declarator->u.id.unqualified_name;
8361 switch (TREE_CODE (unqualified_id))
8364 unqualified_id = TREE_OPERAND (unqualified_id, 0);
8365 if (TYPE_P (unqualified_id))
8366 unqualified_id = constructor_name (unqualified_id);
8369 case IDENTIFIER_NODE:
8370 case TEMPLATE_ID_EXPR:
8378 /* Determine the type of the entity declared by recurring on the
8380 for (; declarator; declarator = declarator->declarator)
8382 const cp_declarator *inner_declarator;
8385 if (type == error_mark_node)
8386 return error_mark_node;
8388 attrs = declarator->attributes;
8394 if (declarator == NULL || declarator->kind == cdk_id)
8395 attr_flags |= (int) ATTR_FLAG_DECL_NEXT;
8396 if (declarator->kind == cdk_function)
8397 attr_flags |= (int) ATTR_FLAG_FUNCTION_NEXT;
8398 if (declarator->kind == cdk_array)
8399 attr_flags |= (int) ATTR_FLAG_ARRAY_NEXT;
8400 returned_attrs = decl_attributes (&type,
8401 chainon (returned_attrs, attrs),
8405 if (declarator->kind == cdk_id)
8408 inner_declarator = declarator->declarator;
8410 switch (declarator->kind)
8413 type = create_array_type_for_decl (dname, type,
8414 declarator->u.array.bounds);
8422 /* Declaring a function type.
8423 Make sure we have a valid type for the function to return. */
8425 if (type_quals != TYPE_UNQUALIFIED)
8427 if (SCALAR_TYPE_P (type) || VOID_TYPE_P (type))
8428 warning (OPT_Wignored_qualifiers,
8429 "type qualifiers ignored on function return type");
8430 /* We now know that the TYPE_QUALS don't apply to the
8431 decl, but to its return type. */
8432 type_quals = TYPE_UNQUALIFIED;
8434 errmsg = targetm.invalid_return_type (type);
8438 type = integer_type_node;
8441 /* Error about some types functions can't return. */
8443 if (TREE_CODE (type) == FUNCTION_TYPE)
8445 error ("%qs declared as function returning a function", name);
8446 return error_mark_node;
8448 if (TREE_CODE (type) == ARRAY_TYPE)
8450 error ("%qs declared as function returning an array", name);
8451 return error_mark_node;
8454 /* Pick up type qualifiers which should be applied to `this'. */
8455 memfn_quals = declarator->u.function.qualifiers;
8457 /* Pick up the exception specifications. */
8458 raises = declarator->u.function.exception_specification;
8460 /* Say it's a definition only for the CALL_EXPR
8461 closest to the identifier. */
8462 funcdecl_p = inner_declarator && inner_declarator->kind == cdk_id;
8464 /* Handle a late-specified return type. */
8467 if (type_uses_auto (type))
8469 if (!declarator->u.function.late_return_type)
8471 error ("%qs function uses %<auto%> type specifier without"
8472 " late return type", name);
8473 return error_mark_node;
8475 else if (!is_auto (type))
8477 error ("%qs function with late return type has"
8478 " %qT as its type rather than plain %<auto%>",
8480 return error_mark_node;
8483 else if (declarator->u.function.late_return_type)
8485 error ("%qs function with late return type not declared"
8486 " with %<auto%> type specifier", name);
8487 return error_mark_node;
8490 type = splice_late_return_type
8491 (type, declarator->u.function.late_return_type);
8492 if (type == error_mark_node)
8493 return error_mark_node;
8495 if (ctype == NULL_TREE
8496 && decl_context == FIELD
8498 && (friendp == 0 || dname == current_class_name))
8499 ctype = current_class_type;
8501 if (ctype && (sfk == sfk_constructor
8502 || sfk == sfk_destructor))
8504 /* We are within a class's scope. If our declarator name
8505 is the same as the class name, and we are defining
8506 a function, then it is a constructor/destructor, and
8507 therefore returns a void type. */
8509 /* ISO C++ 12.4/2. A destructor may not be declared
8510 const or volatile. A destructor may not be
8513 ISO C++ 12.1. A constructor may not be declared
8514 const or volatile. A constructor may not be
8515 virtual. A constructor may not be static. */
8517 error ((flags == DTOR_FLAG)
8518 ? "destructor cannot be static member function"
8519 : "constructor cannot be static member function");
8522 error ((flags == DTOR_FLAG)
8523 ? "destructors may not be cv-qualified"
8524 : "constructors may not be cv-qualified");
8525 memfn_quals = TYPE_UNQUALIFIED;
8528 if (decl_context == FIELD
8529 && !member_function_or_else (ctype,
8532 return error_mark_node;
8534 if (flags != DTOR_FLAG)
8536 /* It's a constructor. */
8541 permerror (input_location, "constructors cannot be declared virtual");
8544 if (decl_context == FIELD
8545 && sfk != sfk_constructor)
8546 return error_mark_node;
8548 if (decl_context == FIELD)
8554 error ("can't initialize friend function %qs", name);
8557 /* Cannot be both friend and virtual. */
8558 error ("virtual functions cannot be friends");
8561 if (decl_context == NORMAL)
8562 error ("friend declaration not in class definition");
8563 if (current_function_decl && funcdef_flag)
8564 error ("can't define friend function %qs in a local "
8568 else if (ctype && sfk == sfk_conversion)
8572 maybe_warn_cpp0x (CPP0X_EXPLICIT_CONVERSION);
8577 /* It is not allowed to use `constexpr' in a function
8578 declaration that is not a definition.
8579 That is too strict, though. */
8580 if (constexpr_p && !funcdef_flag)
8582 error ("the %<constexpr%> specifier cannot be used in "
8583 "a function declaration that is not a definition");
8584 constexpr_p = false;
8587 /* A constexpr non-static member function is implicitly const. */
8588 if (constexpr_p && decl_context == FIELD && staticp == 0
8589 && sfk != sfk_constructor && sfk != sfk_destructor)
8590 memfn_quals |= TYPE_QUAL_CONST;
8592 arg_types = grokparms (declarator->u.function.parameters,
8595 if (inner_declarator
8596 && inner_declarator->kind == cdk_id
8597 && inner_declarator->u.id.sfk == sfk_destructor
8598 && arg_types != void_list_node)
8600 error ("destructors may not have parameters");
8601 arg_types = void_list_node;
8605 type = build_function_type (type, arg_types);
8612 /* Filter out pointers-to-references and references-to-references.
8613 We can get these if a TYPE_DECL is used. */
8615 if (TREE_CODE (type) == REFERENCE_TYPE)
8617 if (declarator->kind != cdk_reference)
8619 error ("cannot declare pointer to %q#T", type);
8620 type = TREE_TYPE (type);
8623 /* In C++0x, we allow reference to reference declarations
8624 that occur indirectly through typedefs [7.1.3/8 dcl.typedef]
8625 and template type arguments [14.3.1/4 temp.arg.type]. The
8626 check for direct reference to reference declarations, which
8627 are still forbidden, occurs below. Reasoning behind the change
8628 can be found in DR106, DR540, and the rvalue reference
8630 else if (cxx_dialect == cxx98)
8632 error ("cannot declare reference to %q#T", type);
8633 type = TREE_TYPE (type);
8636 else if (VOID_TYPE_P (type))
8638 if (declarator->kind == cdk_reference)
8639 error ("cannot declare reference to %q#T", type);
8640 else if (declarator->kind == cdk_ptrmem)
8641 error ("cannot declare pointer to %q#T member", type);
8644 /* We now know that the TYPE_QUALS don't apply to the decl,
8645 but to the target of the pointer. */
8646 type_quals = TYPE_UNQUALIFIED;
8648 if (declarator->kind == cdk_ptrmem
8649 && (TREE_CODE (type) == FUNCTION_TYPE
8650 || (memfn_quals && TREE_CODE (type) == METHOD_TYPE)))
8652 memfn_quals |= cp_type_quals (type);
8653 type = build_memfn_type (type,
8654 declarator->u.pointer.class_type,
8656 memfn_quals = TYPE_UNQUALIFIED;
8659 if (TREE_CODE (type) == FUNCTION_TYPE
8660 && cp_type_quals (type) != TYPE_UNQUALIFIED)
8661 error (declarator->kind == cdk_reference
8662 ? G_("cannot declare reference to qualified function type %qT")
8663 : G_("cannot declare pointer to qualified function type %qT"),
8666 if (declarator->kind == cdk_reference)
8668 /* In C++0x, the type we are creating a reference to might be
8669 a typedef which is itself a reference type. In that case,
8670 we follow the reference collapsing rules in
8671 [7.1.3/8 dcl.typedef] to create the final reference type:
8673 "If a typedef TD names a type that is a reference to a type
8674 T, an attempt to create the type 'lvalue reference to cv TD'
8675 creates the type 'lvalue reference to T,' while an attempt
8676 to create the type "rvalue reference to cv TD' creates the
8679 if (!VOID_TYPE_P (type))
8680 type = cp_build_reference_type
8681 ((TREE_CODE (type) == REFERENCE_TYPE
8682 ? TREE_TYPE (type) : type),
8683 (declarator->u.reference.rvalue_ref
8684 && (TREE_CODE(type) != REFERENCE_TYPE
8685 || TYPE_REF_IS_RVALUE (type))));
8687 /* In C++0x, we need this check for direct reference to
8688 reference declarations, which are forbidden by
8689 [8.3.2/5 dcl.ref]. Reference to reference declarations
8690 are only allowed indirectly through typedefs and template
8691 type arguments. Example:
8693 void foo(int & &); // invalid ref-to-ref decl
8695 typedef int & int_ref;
8696 void foo(int_ref &); // valid ref-to-ref decl
8698 if (inner_declarator && inner_declarator->kind == cdk_reference)
8699 error ("cannot declare reference to %q#T, which is not "
8700 "a typedef or a template type argument", type);
8702 else if (TREE_CODE (type) == METHOD_TYPE)
8703 type = build_ptrmemfunc_type (build_pointer_type (type));
8704 else if (declarator->kind == cdk_ptrmem)
8706 gcc_assert (TREE_CODE (declarator->u.pointer.class_type)
8708 if (declarator->u.pointer.class_type == error_mark_node)
8709 /* We will already have complained. */
8710 type = error_mark_node;
8712 type = build_ptrmem_type (declarator->u.pointer.class_type,
8716 type = build_pointer_type (type);
8718 /* Process a list of type modifier keywords (such as
8719 const or volatile) that were given inside the `*' or `&'. */
8721 if (declarator->u.pointer.qualifiers)
8724 = cp_build_qualified_type (type,
8725 declarator->u.pointer.qualifiers);
8726 type_quals = cp_type_quals (type);
8739 if (unqualified_id && TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR
8740 && TREE_CODE (type) != FUNCTION_TYPE
8741 && TREE_CODE (type) != METHOD_TYPE)
8743 error ("template-id %qD used as a declarator",
8745 unqualified_id = dname;
8748 /* If TYPE is a FUNCTION_TYPE, but the function name was explicitly
8749 qualified with a class-name, turn it into a METHOD_TYPE, unless
8750 we know that the function is static. We take advantage of this
8751 opportunity to do other processing that pertains to entities
8752 explicitly declared to be class members. Note that if DECLARATOR
8753 is non-NULL, we know it is a cdk_id declarator; otherwise, we
8754 would not have exited the loop above. */
8756 && declarator->u.id.qualifying_scope
8757 && TYPE_P (declarator->u.id.qualifying_scope))
8761 ctype = declarator->u.id.qualifying_scope;
8762 ctype = TYPE_MAIN_VARIANT (ctype);
8764 while (t != NULL_TREE && CLASS_TYPE_P (t))
8766 /* You're supposed to have one `template <...>' for every
8767 template class, but you don't need one for a full
8768 specialization. For example:
8770 template <class T> struct S{};
8771 template <> struct S<int> { void f(); };
8772 void S<int>::f () {}
8774 is correct; there shouldn't be a `template <>' for the
8775 definition of `S<int>::f'. */
8776 if (CLASSTYPE_TEMPLATE_SPECIALIZATION (t)
8777 && !any_dependent_template_arguments_p (CLASSTYPE_TI_ARGS (t)))
8778 /* T is an explicit (not partial) specialization. All
8779 containing classes must therefore also be explicitly
8782 if ((CLASSTYPE_USE_TEMPLATE (t) || CLASSTYPE_IS_TEMPLATE (t))
8783 && PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (t)))
8784 template_count += 1;
8786 t = TYPE_MAIN_DECL (t);
8787 t = DECL_CONTEXT (t);
8790 if (ctype == current_class_type)
8794 permerror (input_location, "member functions are implicitly friends of their class");
8798 permerror (declarator->id_loc,
8799 "extra qualification %<%T::%> on member %qs",
8802 else if (/* If the qualifying type is already complete, then we
8803 can skip the following checks. */
8804 !COMPLETE_TYPE_P (ctype)
8805 && (/* If the function is being defined, then
8806 qualifying type must certainly be complete. */
8808 /* A friend declaration of "T::f" is OK, even if
8809 "T" is a template parameter. But, if this
8810 function is not a friend, the qualifying type
8812 || (!friendp && !CLASS_TYPE_P (ctype))
8813 /* For a declaration, the type need not be
8814 complete, if either it is dependent (since there
8815 is no meaningful definition of complete in that
8816 case) or the qualifying class is currently being
8818 || !(dependent_type_p (ctype)
8819 || currently_open_class (ctype)))
8820 /* Check that the qualifying type is complete. */
8821 && !complete_type_or_else (ctype, NULL_TREE))
8822 return error_mark_node;
8823 else if (TREE_CODE (type) == FUNCTION_TYPE)
8825 tree sname = declarator->u.id.unqualified_name;
8827 if (current_class_type
8828 && (!friendp || funcdef_flag))
8831 ? "cannot define member function %<%T::%s%> within %<%T%>"
8832 : "cannot declare member function %<%T::%s%> within %<%T%>",
8833 ctype, name, current_class_type);
8834 return error_mark_node;
8837 /* It is not permitted to define a member function outside ist
8838 membership class as `constexpr'. */
8840 error ("a constexpr function cannot be defined "
8841 "outside of its class");
8843 if (TREE_CODE (sname) == IDENTIFIER_NODE
8844 && NEW_DELETE_OPNAME_P (sname))
8845 /* Overloaded operator new and operator delete
8846 are always static functions. */
8849 type = build_memfn_type (type, ctype, memfn_quals);
8851 else if (declspecs->specs[(int)ds_typedef]
8852 && current_class_type)
8854 error ("cannot declare member %<%T::%s%> within %qT",
8855 ctype, name, current_class_type);
8856 return error_mark_node;
8860 /* Now TYPE has the actual type. */
8865 *attrlist = chainon (returned_attrs, *attrlist);
8867 attrlist = &returned_attrs;
8870 /* Handle parameter packs. */
8871 if (parameter_pack_p)
8873 if (decl_context == PARM)
8874 /* Turn the type into a pack expansion.*/
8875 type = make_pack_expansion (type);
8877 error ("non-parameter %qs cannot be a parameter pack", name);
8880 /* Did array size calculations overflow? */
8882 if (TREE_CODE (type) == ARRAY_TYPE
8883 && COMPLETE_TYPE_P (type)
8884 && TREE_CODE (TYPE_SIZE_UNIT (type)) == INTEGER_CST
8885 && TREE_OVERFLOW (TYPE_SIZE_UNIT (type)))
8887 error ("size of array %qs is too large", name);
8888 /* If we proceed with the array type as it is, we'll eventually
8889 crash in tree_low_cst(). */
8890 type = error_mark_node;
8893 if ((decl_context == FIELD || decl_context == PARM)
8894 && !processing_template_decl
8895 && variably_modified_type_p (type, NULL_TREE))
8897 if (decl_context == FIELD)
8898 error ("data member may not have variably modified type %qT", type);
8900 error ("parameter may not have variably modified type %qT", type);
8901 type = error_mark_node;
8904 if (explicitp == 1 || (explicitp && friendp))
8906 /* [dcl.fct.spec] The explicit specifier shall only be used in
8907 declarations of constructors within a class definition. */
8908 error ("only declarations of constructors can be %<explicit%>");
8912 if (storage_class == sc_mutable)
8914 if (decl_context != FIELD || friendp)
8916 error ("non-member %qs cannot be declared %<mutable%>", name);
8917 storage_class = sc_none;
8919 else if (decl_context == TYPENAME || declspecs->specs[(int)ds_typedef])
8921 error ("non-object member %qs cannot be declared %<mutable%>", name);
8922 storage_class = sc_none;
8924 else if (TREE_CODE (type) == FUNCTION_TYPE
8925 || TREE_CODE (type) == METHOD_TYPE)
8927 error ("function %qs cannot be declared %<mutable%>", name);
8928 storage_class = sc_none;
8932 error ("static %qs cannot be declared %<mutable%>", name);
8933 storage_class = sc_none;
8935 else if (type_quals & TYPE_QUAL_CONST)
8937 error ("const %qs cannot be declared %<mutable%>", name);
8938 storage_class = sc_none;
8942 /* If this is declaring a typedef name, return a TYPE_DECL. */
8943 if (declspecs->specs[(int)ds_typedef] && decl_context != TYPENAME)
8947 /* Note that the grammar rejects storage classes
8948 in typenames, fields or parameters. */
8949 if (current_lang_name == lang_name_java)
8950 TYPE_FOR_JAVA (type) = 1;
8952 /* This declaration:
8954 typedef void f(int) const;
8956 declares a function type which is not a member of any
8957 particular class, but which is cv-qualified; for
8958 example "f S::*" declares a pointer to a const-qualified
8959 member function of S. We record the cv-qualification in the
8961 if (memfn_quals && TREE_CODE (type) == FUNCTION_TYPE)
8963 type = cp_build_qualified_type (type, memfn_quals);
8965 /* We have now dealt with these qualifiers. */
8966 memfn_quals = TYPE_UNQUALIFIED;
8969 if (decl_context == FIELD)
8970 decl = build_lang_decl (TYPE_DECL, unqualified_id, type);
8972 decl = build_decl (input_location, TYPE_DECL, unqualified_id, type);
8973 if (id_declarator && declarator->u.id.qualifying_scope) {
8974 error_at (DECL_SOURCE_LOCATION (decl),
8975 "typedef name may not be a nested-name-specifier");
8976 TREE_TYPE (decl) = error_mark_node;
8979 if (decl_context != FIELD)
8981 if (!current_function_decl)
8982 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
8983 else if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (current_function_decl)
8984 || (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P
8985 (current_function_decl)))
8986 /* The TYPE_DECL is "abstract" because there will be
8987 clones of this constructor/destructor, and there will
8988 be copies of this TYPE_DECL generated in those
8990 DECL_ABSTRACT (decl) = 1;
8992 else if (constructor_name_p (unqualified_id, current_class_type))
8993 permerror (input_location, "ISO C++ forbids nested type %qD with same name "
8994 "as enclosing class",
8997 /* If the user declares "typedef struct {...} foo" then the
8998 struct will have an anonymous name. Fill that name in now.
8999 Nothing can refer to it, so nothing needs know about the name
9001 if (type != error_mark_node
9004 && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
9005 && TYPE_ANONYMOUS_P (type)
9006 && cp_type_quals (type) == TYPE_UNQUALIFIED)
9010 /* Replace the anonymous name with the real name everywhere. */
9011 for (t = TYPE_MAIN_VARIANT (type); t; t = TYPE_NEXT_VARIANT (t))
9013 if (ANON_AGGRNAME_P (TYPE_IDENTIFIER (t)))
9015 debug_hooks->set_name (t, decl);
9016 TYPE_NAME (t) = decl;
9020 if (TYPE_LANG_SPECIFIC (type))
9021 TYPE_WAS_ANONYMOUS (type) = 1;
9023 /* If this is a typedef within a template class, the nested
9024 type is a (non-primary) template. The name for the
9025 template needs updating as well. */
9026 if (TYPE_LANG_SPECIFIC (type) && CLASSTYPE_TEMPLATE_INFO (type))
9027 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type))
9028 = TYPE_IDENTIFIER (type);
9030 /* Adjust linkage now that we aren't anonymous anymore. */
9031 set_linkage_according_to_type (type, TYPE_MAIN_DECL (type));
9032 determine_visibility (TYPE_MAIN_DECL (type));
9034 /* FIXME remangle member functions; member functions of a
9035 type with external linkage have external linkage. */
9039 || (typedef_decl && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl)))
9040 C_TYPEDEF_EXPLICITLY_SIGNED (decl) = 1;
9042 bad_specifiers (decl, "type", virtualp,
9043 memfn_quals != TYPE_UNQUALIFIED,
9044 inlinep, friendp, raises != NULL_TREE);
9049 /* Detect the case of an array type of unspecified size
9050 which came, as such, direct from a typedef name.
9051 We must copy the type, so that the array's domain can be
9052 individually set by the object's initializer. */
9054 if (type && typedef_type
9055 && TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type)
9056 && TYPE_MAIN_VARIANT (type) == TYPE_MAIN_VARIANT (typedef_type))
9057 type = build_cplus_array_type (TREE_TYPE (type), NULL_TREE);
9059 /* Detect where we're using a typedef of function type to declare a
9060 function. PARMS will not be set, so we must create it now. */
9062 if (type == typedef_type && TREE_CODE (type) == FUNCTION_TYPE)
9064 tree decls = NULL_TREE;
9067 for (args = TYPE_ARG_TYPES (type);
9068 args && args != void_list_node;
9069 args = TREE_CHAIN (args))
9071 tree decl = cp_build_parm_decl (NULL_TREE, TREE_VALUE (args));
9073 TREE_CHAIN (decl) = decls;
9077 parms = nreverse (decls);
9079 if (decl_context != TYPENAME)
9081 /* A cv-qualifier-seq shall only be part of the function type
9082 for a non-static member function. [8.3.5/4 dcl.fct] */
9083 if (cp_type_quals (type) != TYPE_UNQUALIFIED
9084 && (current_class_type == NULL_TREE || staticp) )
9087 ? G_("qualified function types cannot be used to "
9088 "declare static member functions")
9089 : G_("qualified function types cannot be used to "
9090 "declare free functions"));
9091 type = TYPE_MAIN_VARIANT (type);
9094 /* The qualifiers on the function type become the qualifiers on
9095 the non-static member function. */
9096 memfn_quals |= cp_type_quals (type);
9097 type_quals = TYPE_UNQUALIFIED;
9101 /* If this is a type name (such as, in a cast or sizeof),
9102 compute the type and return it now. */
9104 if (decl_context == TYPENAME)
9106 /* Note that the grammar rejects storage classes
9107 in typenames, fields or parameters. */
9108 if (type_quals != TYPE_UNQUALIFIED)
9109 type_quals = TYPE_UNQUALIFIED;
9111 /* Special case: "friend class foo" looks like a TYPENAME context. */
9114 if (type_quals != TYPE_UNQUALIFIED)
9116 error ("type qualifiers specified for friend class declaration");
9117 type_quals = TYPE_UNQUALIFIED;
9121 error ("%<inline%> specified for friend class declaration");
9127 /* Don't allow friend declaration without a class-key. */
9128 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
9129 permerror (input_location, "template parameters cannot be friends");
9130 else if (TREE_CODE (type) == TYPENAME_TYPE)
9131 permerror (input_location, "friend declaration requires class-key, "
9132 "i.e. %<friend class %T::%D%>",
9133 TYPE_CONTEXT (type), TYPENAME_TYPE_FULLNAME (type));
9135 permerror (input_location, "friend declaration requires class-key, "
9136 "i.e. %<friend %#T%>",
9140 /* Only try to do this stuff if we didn't already give up. */
9141 if (type != integer_type_node)
9143 /* A friendly class? */
9144 if (current_class_type)
9145 make_friend_class (current_class_type, TYPE_MAIN_VARIANT (type),
9148 error ("trying to make class %qT a friend of global scope",
9151 type = void_type_node;
9154 else if (memfn_quals)
9156 if (ctype == NULL_TREE
9157 && TREE_CODE (type) == METHOD_TYPE)
9158 ctype = TYPE_METHOD_BASETYPE (type);
9161 type = build_memfn_type (type, ctype, memfn_quals);
9162 /* Core issue #547: need to allow this in template type args. */
9163 else if (template_type_arg && TREE_CODE (type) == FUNCTION_TYPE)
9164 type = cp_build_qualified_type (type, memfn_quals);
9166 error ("invalid qualifiers on non-member function type");
9171 else if (unqualified_id == NULL_TREE && decl_context != PARM
9172 && decl_context != CATCHPARM
9173 && TREE_CODE (type) != UNION_TYPE
9176 error ("abstract declarator %qT used as declaration", type);
9177 return error_mark_node;
9180 /* Only functions may be declared using an operator-function-id. */
9182 && IDENTIFIER_OPNAME_P (unqualified_id)
9183 && TREE_CODE (type) != FUNCTION_TYPE
9184 && TREE_CODE (type) != METHOD_TYPE)
9186 error ("declaration of %qD as non-function", unqualified_id);
9187 return error_mark_node;
9190 /* We don't check parameter types here because we can emit a better
9191 error message later. */
9192 if (decl_context != PARM)
9194 type = check_var_type (unqualified_id, type);
9195 if (type == error_mark_node)
9196 return error_mark_node;
9199 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
9200 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
9202 if (decl_context == PARM || decl_context == CATCHPARM)
9204 if (ctype || in_namespace)
9205 error ("cannot use %<::%> in parameter declaration");
9207 /* A parameter declared as an array of T is really a pointer to T.
9208 One declared as a function is really a pointer to a function.
9209 One declared as a member is really a pointer to member. */
9211 if (TREE_CODE (type) == ARRAY_TYPE)
9213 /* Transfer const-ness of array into that of type pointed to. */
9214 type = build_pointer_type (TREE_TYPE (type));
9215 type_quals = TYPE_UNQUALIFIED;
9217 else if (TREE_CODE (type) == FUNCTION_TYPE)
9218 type = build_pointer_type (type);
9224 if (decl_context == PARM)
9226 decl = cp_build_parm_decl (unqualified_id, type);
9228 bad_specifiers (decl, "parameter", virtualp,
9229 memfn_quals != TYPE_UNQUALIFIED,
9230 inlinep, friendp, raises != NULL_TREE);
9232 else if (decl_context == FIELD)
9234 /* The C99 flexible array extension. */
9235 if (!staticp && TREE_CODE (type) == ARRAY_TYPE
9236 && TYPE_DOMAIN (type) == NULL_TREE)
9238 tree itype = compute_array_index_type (dname, integer_zero_node);
9239 type = build_cplus_array_type (TREE_TYPE (type), itype);
9242 if (type == error_mark_node)
9244 /* Happens when declaring arrays of sizes which
9245 are error_mark_node, for example. */
9248 else if (in_namespace && !friendp)
9250 /* Something like struct S { int N::j; }; */
9251 error ("invalid use of %<::%>");
9252 return error_mark_node;
9254 else if (TREE_CODE (type) == FUNCTION_TYPE)
9257 tree function_context;
9261 if (ctype == NULL_TREE)
9262 ctype = current_class_type;
9264 if (ctype == NULL_TREE)
9266 error ("can't make %qD into a method -- not in a class",
9268 return error_mark_node;
9271 /* ``A union may [ ... ] not [ have ] virtual functions.''
9273 if (virtualp && TREE_CODE (ctype) == UNION_TYPE)
9275 error ("function %qD declared virtual inside a union",
9277 return error_mark_node;
9280 if (NEW_DELETE_OPNAME_P (unqualified_id))
9284 error ("%qD cannot be declared virtual, since it "
9290 else if (staticp < 2)
9291 type = build_memfn_type (type, ctype, memfn_quals);
9294 /* Check that the name used for a destructor makes sense. */
9295 if (sfk == sfk_destructor)
9297 tree uqname = id_declarator->u.id.unqualified_name;
9301 gcc_assert (friendp);
9302 error ("expected qualified name in friend declaration "
9303 "for destructor %qD", uqname);
9304 return error_mark_node;
9307 if (!check_dtor_name (ctype, TREE_OPERAND (uqname, 0)))
9309 error ("declaration of %qD as member of %qT",
9311 return error_mark_node;
9314 error ("a destructor cannot be %<constexpr%>");
9316 else if (sfk == sfk_constructor && friendp)
9318 error ("expected qualified name in friend declaration "
9319 "for constructor %qD",
9320 id_declarator->u.id.unqualified_name);
9321 return error_mark_node;
9324 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
9325 function_context = (ctype != NULL_TREE) ?
9326 decl_function_context (TYPE_MAIN_DECL (ctype)) : NULL_TREE;
9327 publicp = (! friendp || ! staticp)
9328 && function_context == NULL_TREE;
9329 decl = grokfndecl (ctype, type,
9330 TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
9331 ? unqualified_id : dname,
9334 virtualp, flags, memfn_quals, raises,
9335 friendp ? -1 : 0, friendp, publicp,
9336 inlinep || constexpr_p,
9338 funcdef_flag, template_count, in_namespace,
9339 attrlist, declarator->id_loc);
9340 if (decl == NULL_TREE)
9341 return error_mark_node;
9343 /* This clobbers the attrs stored in `decl' from `attrlist'. */
9344 /* The decl and setting of decl_attr is also turned off. */
9345 decl = build_decl_attribute_variant (decl, decl_attr);
9348 /* [class.conv.ctor]
9350 A constructor declared without the function-specifier
9351 explicit that can be called with a single parameter
9352 specifies a conversion from the type of its first
9353 parameter to the type of its class. Such a constructor
9354 is called a converting constructor. */
9356 DECL_NONCONVERTING_P (decl) = 1;
9358 else if (TREE_CODE (type) == METHOD_TYPE)
9360 /* We only get here for friend declarations of
9361 members of other classes. */
9362 /* All method decls are public, so tell grokfndecl to set
9363 TREE_PUBLIC, also. */
9364 decl = grokfndecl (ctype, type,
9365 TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
9366 ? unqualified_id : dname,
9369 virtualp, flags, memfn_quals, raises,
9370 friendp ? -1 : 0, friendp, 1, 0, sfk,
9371 funcdef_flag, template_count, in_namespace,
9373 declarator->id_loc);
9374 if (decl == NULL_TREE)
9375 return error_mark_node;
9377 else if (!staticp && !dependent_type_p (type)
9378 && !COMPLETE_TYPE_P (complete_type (type))
9379 && (TREE_CODE (type) != ARRAY_TYPE || initialized == 0))
9382 error ("field %qD has incomplete type", unqualified_id);
9384 error ("name %qT has incomplete type", type);
9386 /* If we're instantiating a template, tell them which
9387 instantiation made the field's type be incomplete. */
9388 if (current_class_type
9389 && TYPE_NAME (current_class_type)
9390 && IDENTIFIER_TEMPLATE (TYPE_IDENTIFIER (current_class_type))
9392 && declspecs->type == type)
9393 error (" in instantiation of template %qT",
9394 current_class_type);
9396 return error_mark_node;
9402 error ("%qE is neither function nor member function; "
9403 "cannot be declared friend", unqualified_id);
9411 /* Friends are treated specially. */
9412 if (ctype == current_class_type)
9413 ; /* We already issued a permerror. */
9414 else if (decl && DECL_NAME (decl))
9416 if (template_class_depth (current_class_type) == 0)
9418 decl = check_explicit_specialization
9419 (unqualified_id, decl, template_count,
9420 2 * funcdef_flag + 4);
9421 if (decl == error_mark_node)
9422 return error_mark_node;
9425 DECL_DECLARED_CONSTEXPR_P (decl) = constexpr_p;
9426 decl = do_friend (ctype, unqualified_id, decl,
9432 return error_mark_node;
9435 /* Structure field. It may not be a function, except for C++. */
9437 if (decl == NULL_TREE)
9443 /* An attempt is being made to initialize a non-static
9444 member. But, from [class.mem]:
9446 4 A member-declarator can contain a
9447 constant-initializer only if it declares a static
9448 member (_class.static_) of integral or enumeration
9449 type, see _class.static.data_.
9451 This used to be relatively common practice, but
9452 the rest of the compiler does not correctly
9453 handle the initialization unless the member is
9454 static so we make it static below. */
9455 permerror (input_location, "ISO C++ forbids initialization of member %qD",
9457 permerror (input_location, "making %qD static", unqualified_id);
9461 if (uses_template_parms (type))
9462 /* We'll check at instantiation time. */
9464 else if (check_static_variable_definition (unqualified_id,
9466 /* If we just return the declaration, crashes
9467 will sometimes occur. We therefore return
9468 void_type_node, as if this was a friend
9469 declaration, to cause callers to completely
9470 ignore this declaration. */
9471 return error_mark_node;
9476 /* C++ allows static class members. All other work
9477 for this is done by grokfield. */
9478 decl = build_lang_decl (VAR_DECL, unqualified_id, type);
9479 set_linkage_for_static_data_member (decl);
9480 /* Even if there is an in-class initialization, DECL
9481 is considered undefined until an out-of-class
9482 definition is provided. */
9483 DECL_EXTERNAL (decl) = 1;
9486 DECL_TLS_MODEL (decl) = decl_default_tls_model (decl);
9491 error ("non-static data member %qE declared %<constexpr%>",
9493 decl = build_decl (input_location,
9494 FIELD_DECL, unqualified_id, type);
9495 DECL_NONADDRESSABLE_P (decl) = bitfield;
9496 if (bitfield && !unqualified_id)
9497 TREE_NO_WARNING (decl) = 1;
9499 if (storage_class == sc_mutable)
9501 DECL_MUTABLE_P (decl) = 1;
9502 storage_class = sc_none;
9506 bad_specifiers (decl, "field", virtualp,
9507 memfn_quals != TYPE_UNQUALIFIED,
9508 inlinep, friendp, raises != NULL_TREE);
9511 else if (TREE_CODE (type) == FUNCTION_TYPE
9512 || TREE_CODE (type) == METHOD_TYPE)
9517 if (!unqualified_id)
9518 return error_mark_node;
9520 if (TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR)
9521 original_name = dname;
9523 original_name = unqualified_id;
9525 if (storage_class == sc_auto)
9526 error ("storage class %<auto%> invalid for function %qs", name);
9527 else if (storage_class == sc_register)
9528 error ("storage class %<register%> invalid for function %qs", name);
9530 error ("storage class %<__thread%> invalid for function %qs", name);
9532 /* Function declaration not at top level.
9533 Storage classes other than `extern' are not allowed
9534 and `extern' makes no difference. */
9535 if (! toplevel_bindings_p ()
9536 && (storage_class == sc_static
9537 || declspecs->specs[(int)ds_inline])
9540 if (storage_class == sc_static)
9541 pedwarn (input_location, OPT_pedantic,
9542 "%<static%> specified invalid for function %qs "
9543 "declared out of global scope", name);
9545 pedwarn (input_location, OPT_pedantic,
9546 "%<inline%> specifier invalid for function %qs "
9547 "declared out of global scope", name);
9550 if (ctype != NULL_TREE
9551 && TREE_CODE (ctype) != NAMESPACE_DECL && !MAYBE_CLASS_TYPE_P (ctype))
9553 error ("%q#T is not a class or a namespace", ctype);
9557 if (ctype == NULL_TREE)
9561 error ("virtual non-class function %qs", name);
9564 else if (sfk == sfk_constructor
9565 || sfk == sfk_destructor)
9568 ? "%qs defined in a non-class scope"
9569 : "%qs declared in a non-class scope", name);
9573 else if (TREE_CODE (type) == FUNCTION_TYPE && staticp < 2
9574 && !NEW_DELETE_OPNAME_P (original_name))
9575 type = build_method_type_directly (ctype,
9577 TYPE_ARG_TYPES (type));
9579 /* Record presence of `static'. */
9580 publicp = (ctype != NULL_TREE
9581 || storage_class == sc_extern
9582 || storage_class != sc_static);
9584 decl = grokfndecl (ctype, type, original_name, parms, unqualified_id,
9585 virtualp, flags, memfn_quals, raises,
9587 publicp, inlinep || constexpr_p, sfk, funcdef_flag,
9588 template_count, in_namespace, attrlist,
9589 declarator->id_loc);
9590 if (decl == NULL_TREE)
9591 return error_mark_node;
9595 int invalid_static = 0;
9597 /* Don't allow a static member function in a class, and forbid
9598 declaring main to be static. */
9599 if (TREE_CODE (type) == METHOD_TYPE)
9601 permerror (input_location, "cannot declare member function %qD to have "
9602 "static linkage", decl);
9605 else if (current_function_decl)
9607 /* FIXME need arm citation */
9608 error ("cannot declare static function inside another function");
9615 storage_class = sc_none;
9621 /* It's a variable. */
9623 /* An uninitialized decl with `extern' is a reference. */
9624 decl = grokvardecl (type, unqualified_id,
9627 (type_quals & TYPE_QUAL_CONST) != 0,
9628 ctype ? ctype : in_namespace);
9629 bad_specifiers (decl, "variable", virtualp,
9630 memfn_quals != TYPE_UNQUALIFIED,
9631 inlinep, friendp, raises != NULL_TREE);
9635 DECL_CONTEXT (decl) = ctype;
9638 permerror (input_location, "%<static%> may not be used when defining "
9639 "(as opposed to declaring) a static data member");
9641 storage_class = sc_none;
9643 if (storage_class == sc_register && TREE_STATIC (decl))
9645 error ("static member %qD declared %<register%>", decl);
9646 storage_class = sc_none;
9648 if (storage_class == sc_extern && pedantic)
9650 pedwarn (input_location, OPT_pedantic,
9651 "cannot explicitly declare member %q#D to have "
9652 "extern linkage", decl);
9653 storage_class = sc_none;
9658 if (storage_class == sc_extern && initialized && !funcdef_flag)
9660 if (toplevel_bindings_p ())
9662 /* It's common practice (and completely valid) to have a const
9663 be initialized and declared extern. */
9664 if (!(type_quals & TYPE_QUAL_CONST))
9665 warning (0, "%qs initialized and declared %<extern%>", name);
9669 error ("%qs has both %<extern%> and initializer", name);
9670 return error_mark_node;
9674 /* Record `register' declaration for warnings on &
9675 and in case doing stupid register allocation. */
9677 if (storage_class == sc_register)
9678 DECL_REGISTER (decl) = 1;
9679 else if (storage_class == sc_extern)
9680 DECL_THIS_EXTERN (decl) = 1;
9681 else if (storage_class == sc_static)
9682 DECL_THIS_STATIC (decl) = 1;
9684 /* Don't forget constexprness. */
9685 if (VAR_OR_FUNCTION_DECL_P (decl))
9686 DECL_DECLARED_CONSTEXPR_P (decl) = constexpr_p;
9688 /* Record constancy and volatility on the DECL itself . There's
9689 no need to do this when processing a template; we'll do this
9690 for the instantiated declaration based on the type of DECL. */
9691 if (!processing_template_decl)
9692 cp_apply_type_quals_to_decl (type_quals, decl);
9698 /* Subroutine of start_function. Ensure that each of the parameter
9699 types (as listed in PARMS) is complete, as is required for a
9700 function definition. */
9703 require_complete_types_for_parms (tree parms)
9705 for (; parms; parms = TREE_CHAIN (parms))
9707 if (dependent_type_p (TREE_TYPE (parms)))
9709 if (!VOID_TYPE_P (TREE_TYPE (parms))
9710 && complete_type_or_else (TREE_TYPE (parms), parms))
9712 relayout_decl (parms);
9713 DECL_ARG_TYPE (parms) = type_passed_as (TREE_TYPE (parms));
9716 /* grokparms or complete_type_or_else will have already issued
9718 TREE_TYPE (parms) = error_mark_node;
9722 /* Returns nonzero if T is a local variable. */
9725 local_variable_p (const_tree t)
9727 if ((TREE_CODE (t) == VAR_DECL
9728 /* A VAR_DECL with a context that is a _TYPE is a static data
9730 && !TYPE_P (CP_DECL_CONTEXT (t))
9731 /* Any other non-local variable must be at namespace scope. */
9732 && !DECL_NAMESPACE_SCOPE_P (t))
9733 || (TREE_CODE (t) == PARM_DECL))
9739 /* Like local_variable_p, but suitable for use as a tree-walking
9743 local_variable_p_walkfn (tree *tp, int *walk_subtrees,
9744 void *data ATTRIBUTE_UNUSED)
9746 if (local_variable_p (*tp) && !DECL_ARTIFICIAL (*tp))
9748 else if (TYPE_P (*tp))
9755 /* Check that ARG, which is a default-argument expression for a
9756 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
9757 something goes wrong. DECL may also be a _TYPE node, rather than a
9758 DECL, if there is no DECL available. */
9761 check_default_argument (tree decl, tree arg)
9766 if (TREE_CODE (arg) == DEFAULT_ARG)
9767 /* We get a DEFAULT_ARG when looking at an in-class declaration
9768 with a default argument. Ignore the argument for now; we'll
9769 deal with it after the class is complete. */
9778 decl_type = TREE_TYPE (decl);
9780 if (arg == error_mark_node
9781 || decl == error_mark_node
9782 || TREE_TYPE (arg) == error_mark_node
9783 || decl_type == error_mark_node)
9784 /* Something already went wrong. There's no need to check
9786 return error_mark_node;
9788 /* [dcl.fct.default]
9790 A default argument expression is implicitly converted to the
9792 if (!TREE_TYPE (arg)
9793 || !can_convert_arg (decl_type, TREE_TYPE (arg), arg, LOOKUP_NORMAL))
9796 error ("default argument for %q#D has type %qT",
9797 decl, TREE_TYPE (arg));
9799 error ("default argument for parameter of type %qT has type %qT",
9800 decl_type, TREE_TYPE (arg));
9802 return error_mark_node;
9805 /* [dcl.fct.default]
9807 Local variables shall not be used in default argument
9810 The keyword `this' shall not be used in a default argument of a
9812 var = cp_walk_tree_without_duplicates (&arg, local_variable_p_walkfn, NULL);
9815 error ("default argument %qE uses local variable %qD", arg, var);
9816 return error_mark_node;
9823 /* Returns a deprecated type used within TYPE, or NULL_TREE if none. */
9826 type_is_deprecated (tree type)
9828 enum tree_code code;
9829 if (TREE_DEPRECATED (type))
9831 if (TYPE_NAME (type)
9832 && TREE_DEPRECATED (TYPE_NAME (type)))
9835 /* Do warn about using typedefs to a deprecated class. */
9836 if (TAGGED_TYPE_P (type) && type != TYPE_MAIN_VARIANT (type))
9837 return type_is_deprecated (TYPE_MAIN_VARIANT (type));
9839 code = TREE_CODE (type);
9841 if (code == POINTER_TYPE || code == REFERENCE_TYPE
9842 || code == OFFSET_TYPE || code == FUNCTION_TYPE
9843 || code == METHOD_TYPE || code == ARRAY_TYPE)
9844 return type_is_deprecated (TREE_TYPE (type));
9846 if (TYPE_PTRMEMFUNC_P (type))
9847 return type_is_deprecated
9848 (TREE_TYPE (TREE_TYPE (TYPE_PTRMEMFUNC_FN_TYPE (type))));
9853 /* Decode the list of parameter types for a function type.
9854 Given the list of things declared inside the parens,
9855 return a list of types.
9857 If this parameter does not end with an ellipsis, we append
9860 *PARMS is set to the chain of PARM_DECLs created. */
9863 grokparms (tree parmlist, tree *parms)
9865 tree result = NULL_TREE;
9866 tree decls = NULL_TREE;
9870 for (parm = parmlist; parm != NULL_TREE; parm = TREE_CHAIN (parm))
9872 tree type = NULL_TREE;
9873 tree init = TREE_PURPOSE (parm);
9874 tree decl = TREE_VALUE (parm);
9877 if (parm == void_list_node)
9880 if (! decl || TREE_TYPE (decl) == error_mark_node)
9883 type = TREE_TYPE (decl);
9884 if (VOID_TYPE_P (type))
9886 if (same_type_p (type, void_type_node)
9887 && DECL_SELF_REFERENCE_P (type)
9888 && !DECL_NAME (decl) && !result && TREE_CHAIN (parm) == void_list_node)
9889 /* this is a parmlist of `(void)', which is ok. */
9891 cxx_incomplete_type_error (decl, type);
9892 /* It's not a good idea to actually create parameters of
9893 type `void'; other parts of the compiler assume that a
9894 void type terminates the parameter list. */
9895 type = error_mark_node;
9896 TREE_TYPE (decl) = error_mark_node;
9899 if (type != error_mark_node
9900 && TYPE_FOR_JAVA (type)
9901 && MAYBE_CLASS_TYPE_P (type))
9903 error ("parameter %qD has Java class type", decl);
9904 type = error_mark_node;
9905 TREE_TYPE (decl) = error_mark_node;
9909 if (type != error_mark_node
9910 && (errmsg = targetm.invalid_parameter_type (type)))
9913 type = error_mark_node;
9914 TREE_TYPE (decl) = error_mark_node;
9917 if (type != error_mark_node)
9919 if (deprecated_state != DEPRECATED_SUPPRESS)
9921 tree deptype = type_is_deprecated (type);
9923 warn_deprecated_use (deptype, NULL_TREE);
9926 /* Top-level qualifiers on the parameters are
9927 ignored for function types. */
9928 type = cp_build_qualified_type (type, 0);
9929 if (TREE_CODE (type) == METHOD_TYPE)
9931 error ("parameter %qD invalidly declared method type", decl);
9932 type = build_pointer_type (type);
9933 TREE_TYPE (decl) = type;
9935 else if (abstract_virtuals_error (decl, type))
9936 any_error = 1; /* Seems like a good idea. */
9937 else if (POINTER_TYPE_P (type))
9939 /* [dcl.fct]/6, parameter types cannot contain pointers
9940 (references) to arrays of unknown bound. */
9941 tree t = TREE_TYPE (type);
9942 int ptr = TYPE_PTR_P (type);
9948 else if (TREE_CODE (t) != ARRAY_TYPE)
9950 else if (!TYPE_DOMAIN (t))
9954 if (TREE_CODE (t) == ARRAY_TYPE)
9956 ? G_("parameter %qD includes pointer to array of "
9957 "unknown bound %qT")
9958 : G_("parameter %qD includes reference to array of "
9959 "unknown bound %qT"),
9965 else if (init && !processing_template_decl)
9966 init = check_default_argument (decl, init);
9969 if (TREE_CODE (decl) == PARM_DECL
9970 && FUNCTION_PARAMETER_PACK_P (decl)
9971 && TREE_CHAIN (parm)
9972 && TREE_CHAIN (parm) != void_list_node)
9973 error ("parameter packs must be at the end of the parameter list");
9975 TREE_CHAIN (decl) = decls;
9977 result = tree_cons (init, type, result);
9979 decls = nreverse (decls);
9980 result = nreverse (result);
9982 result = chainon (result, void_list_node);
9989 /* D is a constructor or overloaded `operator='.
9991 Let T be the class in which D is declared. Then, this function
9994 -1 if D's is an ill-formed constructor or copy assignment operator
9995 whose first parameter is of type `T'.
9996 0 if D is not a copy constructor or copy assignment
9998 1 if D is a copy constructor or copy assignment operator whose
9999 first parameter is a reference to non-const qualified T.
10000 2 if D is a copy constructor or copy assignment operator whose
10001 first parameter is a reference to const qualified T.
10003 This function can be used as a predicate. Positive values indicate
10004 a copy constructor and nonzero values indicate a copy assignment
10008 copy_fn_p (const_tree d)
10014 gcc_assert (DECL_FUNCTION_MEMBER_P (d));
10016 if (TREE_CODE (d) == TEMPLATE_DECL
10017 || (DECL_TEMPLATE_INFO (d)
10018 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d))))
10019 /* Instantiations of template member functions are never copy
10020 functions. Note that member functions of templated classes are
10021 represented as template functions internally, and we must
10022 accept those as copy functions. */
10025 args = FUNCTION_FIRST_USER_PARMTYPE (d);
10029 arg_type = TREE_VALUE (args);
10030 if (arg_type == error_mark_node)
10033 if (TYPE_MAIN_VARIANT (arg_type) == DECL_CONTEXT (d))
10035 /* Pass by value copy assignment operator. */
10038 else if (TREE_CODE (arg_type) == REFERENCE_TYPE
10039 && !TYPE_REF_IS_RVALUE (arg_type)
10040 && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type)) == DECL_CONTEXT (d))
10042 if (CP_TYPE_CONST_P (TREE_TYPE (arg_type)))
10048 args = TREE_CHAIN (args);
10050 if (args && args != void_list_node && !TREE_PURPOSE (args))
10051 /* There are more non-optional args. */
10057 /* D is a constructor or overloaded `operator='.
10059 Let T be the class in which D is declared. Then, this function
10060 returns true when D is a move constructor or move assignment
10061 operator, false otherwise. */
10064 move_fn_p (const_tree d)
10068 bool result = false;
10070 gcc_assert (DECL_FUNCTION_MEMBER_P (d));
10072 if (cxx_dialect == cxx98)
10073 /* There are no move constructors if we are in C++98 mode. */
10076 if (TREE_CODE (d) == TEMPLATE_DECL
10077 || (DECL_TEMPLATE_INFO (d)
10078 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d))))
10079 /* Instantiations of template member functions are never copy
10080 functions. Note that member functions of templated classes are
10081 represented as template functions internally, and we must
10082 accept those as copy functions. */
10085 args = FUNCTION_FIRST_USER_PARMTYPE (d);
10089 arg_type = TREE_VALUE (args);
10090 if (arg_type == error_mark_node)
10093 if (TREE_CODE (arg_type) == REFERENCE_TYPE
10094 && TYPE_REF_IS_RVALUE (arg_type)
10095 && same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (arg_type)),
10099 args = TREE_CHAIN (args);
10101 if (args && args != void_list_node && !TREE_PURPOSE (args))
10102 /* There are more non-optional args. */
10108 /* Remember any special properties of member function DECL. */
10111 grok_special_member_properties (tree decl)
10115 if (!DECL_NONSTATIC_MEMBER_FUNCTION_P (decl))
10118 class_type = DECL_CONTEXT (decl);
10119 if (DECL_CONSTRUCTOR_P (decl))
10121 int ctor = copy_fn_p (decl);
10123 if (!DECL_ARTIFICIAL (decl))
10124 TYPE_HAS_USER_CONSTRUCTOR (class_type) = 1;
10130 A non-template constructor for class X is a copy
10131 constructor if its first parameter is of type X&, const
10132 X&, volatile X& or const volatile X&, and either there
10133 are no other parameters or else all other parameters have
10134 default arguments. */
10135 TYPE_HAS_INIT_REF (class_type) = 1;
10136 if (user_provided_p (decl))
10137 TYPE_HAS_COMPLEX_INIT_REF (class_type) = 1;
10139 TYPE_HAS_CONST_INIT_REF (class_type) = 1;
10141 else if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl)))
10143 TYPE_HAS_DEFAULT_CONSTRUCTOR (class_type) = 1;
10144 if (user_provided_p (decl))
10145 TYPE_HAS_COMPLEX_DFLT (class_type) = 1;
10147 else if (is_list_ctor (decl))
10148 TYPE_HAS_LIST_CTOR (class_type) = 1;
10150 else if (DECL_OVERLOADED_OPERATOR_P (decl) == NOP_EXPR)
10154 A non-template assignment operator for class X is a copy
10155 assignment operator if its parameter is of type X, X&, const
10156 X&, volatile X& or const volatile X&. */
10158 int assop = copy_fn_p (decl);
10162 TYPE_HAS_ASSIGN_REF (class_type) = 1;
10163 if (user_provided_p (decl))
10164 TYPE_HAS_COMPLEX_ASSIGN_REF (class_type) = 1;
10166 TYPE_HAS_CONST_ASSIGN_REF (class_type) = 1;
10171 /* Check a constructor DECL has the correct form. Complains
10172 if the class has a constructor of the form X(X). */
10175 grok_ctor_properties (const_tree ctype, const_tree decl)
10177 int ctor_parm = copy_fn_p (decl);
10183 A declaration of a constructor for a class X is ill-formed if
10184 its first parameter is of type (optionally cv-qualified) X
10185 and either there are no other parameters or else all other
10186 parameters have default arguments.
10188 We *don't* complain about member template instantiations that
10189 have this form, though; they can occur as we try to decide
10190 what constructor to use during overload resolution. Since
10191 overload resolution will never prefer such a constructor to
10192 the non-template copy constructor (which is either explicitly
10193 or implicitly defined), there's no need to worry about their
10194 existence. Theoretically, they should never even be
10195 instantiated, but that's hard to forestall. */
10196 error ("invalid constructor; you probably meant %<%T (const %T&)%>",
10204 /* An operator with this code is unary, but can also be binary. */
10207 ambi_op_p (enum tree_code code)
10209 return (code == INDIRECT_REF
10210 || code == ADDR_EXPR
10211 || code == UNARY_PLUS_EXPR
10212 || code == NEGATE_EXPR
10213 || code == PREINCREMENT_EXPR
10214 || code == PREDECREMENT_EXPR);
10217 /* An operator with this name can only be unary. */
10220 unary_op_p (enum tree_code code)
10222 return (code == TRUTH_NOT_EXPR
10223 || code == BIT_NOT_EXPR
10224 || code == COMPONENT_REF
10225 || code == TYPE_EXPR);
10228 /* DECL is a declaration for an overloaded operator. If COMPLAIN is true,
10229 errors are issued for invalid declarations. */
10232 grok_op_properties (tree decl, bool complain)
10234 tree argtypes = TYPE_ARG_TYPES (TREE_TYPE (decl));
10236 int methodp = (TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE);
10237 tree name = DECL_NAME (decl);
10238 enum tree_code operator_code;
10243 /* Count the number of arguments and check for ellipsis. */
10244 for (argtype = argtypes, arity = 0;
10245 argtype && argtype != void_list_node;
10246 argtype = TREE_CHAIN (argtype))
10248 ellipsis_p = !argtype;
10250 class_type = DECL_CONTEXT (decl);
10251 if (class_type && !CLASS_TYPE_P (class_type))
10252 class_type = NULL_TREE;
10254 if (DECL_CONV_FN_P (decl))
10255 operator_code = TYPE_EXPR;
10259 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
10260 if (ansi_opname (CODE) == name) \
10262 operator_code = (CODE); \
10265 else if (ansi_assopname (CODE) == name) \
10267 operator_code = (CODE); \
10268 DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
10272 #include "operators.def"
10273 #undef DEF_OPERATOR
10275 gcc_unreachable ();
10278 gcc_assert (operator_code != MAX_TREE_CODES);
10279 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
10282 switch (operator_code)
10285 TYPE_HAS_NEW_OPERATOR (class_type) = 1;
10289 TYPE_GETS_DELETE (class_type) |= 1;
10293 TYPE_HAS_ARRAY_NEW_OPERATOR (class_type) = 1;
10296 case VEC_DELETE_EXPR:
10297 TYPE_GETS_DELETE (class_type) |= 2;
10304 /* [basic.std.dynamic.allocation]/1:
10306 A program is ill-formed if an allocation function is declared
10307 in a namespace scope other than global scope or declared static
10310 The same also holds true for deallocation functions. */
10311 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR
10312 || operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
10314 if (DECL_NAMESPACE_SCOPE_P (decl))
10316 if (CP_DECL_CONTEXT (decl) != global_namespace)
10318 error ("%qD may not be declared within a namespace", decl);
10321 else if (!TREE_PUBLIC (decl))
10323 error ("%qD may not be declared as static", decl);
10329 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR)
10331 TREE_TYPE (decl) = coerce_new_type (TREE_TYPE (decl));
10332 DECL_IS_OPERATOR_NEW (decl) = 1;
10334 else if (operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
10335 TREE_TYPE (decl) = coerce_delete_type (TREE_TYPE (decl));
10338 /* An operator function must either be a non-static member function
10339 or have at least one parameter of a class, a reference to a class,
10340 an enumeration, or a reference to an enumeration. 13.4.0.6 */
10341 if (! methodp || DECL_STATIC_FUNCTION_P (decl))
10343 if (operator_code == TYPE_EXPR
10344 || operator_code == CALL_EXPR
10345 || operator_code == COMPONENT_REF
10346 || operator_code == ARRAY_REF
10347 || operator_code == NOP_EXPR)
10349 error ("%qD must be a nonstatic member function", decl);
10356 if (DECL_STATIC_FUNCTION_P (decl))
10358 error ("%qD must be either a non-static member "
10359 "function or a non-member function", decl);
10363 for (p = argtypes; p && p != void_list_node; p = TREE_CHAIN (p))
10365 tree arg = non_reference (TREE_VALUE (p));
10366 if (arg == error_mark_node)
10369 /* MAYBE_CLASS_TYPE_P, rather than CLASS_TYPE_P, is used
10370 because these checks are performed even on
10371 template functions. */
10372 if (MAYBE_CLASS_TYPE_P (arg)
10373 || TREE_CODE (arg) == ENUMERAL_TYPE)
10377 if (!p || p == void_list_node)
10380 error ("%qD must have an argument of class or "
10381 "enumerated type", decl);
10387 /* There are no restrictions on the arguments to an overloaded
10389 if (operator_code == CALL_EXPR)
10392 /* Warn about conversion operators that will never be used. */
10393 if (IDENTIFIER_TYPENAME_P (name)
10394 && ! DECL_TEMPLATE_INFO (decl)
10396 /* Warn only declaring the function; there is no need to
10397 warn again about out-of-class definitions. */
10398 && class_type == current_class_type)
10400 tree t = TREE_TYPE (name);
10401 int ref = (TREE_CODE (t) == REFERENCE_TYPE);
10404 t = TYPE_MAIN_VARIANT (TREE_TYPE (t));
10406 if (TREE_CODE (t) == VOID_TYPE)
10407 warning (OPT_Wconversion,
10409 ? G_("conversion to a reference to void "
10410 "will never use a type conversion operator")
10411 : G_("conversion to void "
10412 "will never use a type conversion operator"));
10413 else if (class_type)
10415 if (t == class_type)
10416 warning (OPT_Wconversion,
10418 ? G_("conversion to a reference to the same type "
10419 "will never use a type conversion operator")
10420 : G_("conversion to the same type "
10421 "will never use a type conversion operator"));
10422 /* Don't force t to be complete here. */
10423 else if (MAYBE_CLASS_TYPE_P (t)
10424 && COMPLETE_TYPE_P (t)
10425 && DERIVED_FROM_P (t, class_type))
10426 warning (OPT_Wconversion,
10428 ? G_("conversion to a reference to a base class "
10429 "will never use a type conversion operator")
10430 : G_("conversion to a base class "
10431 "will never use a type conversion operator"));
10436 if (operator_code == COND_EXPR)
10439 error ("ISO C++ prohibits overloading operator ?:");
10442 else if (ellipsis_p)
10444 error ("%qD must not have variable number of arguments", decl);
10447 else if (ambi_op_p (operator_code))
10450 /* We pick the one-argument operator codes by default, so
10451 we don't have to change anything. */
10453 else if (arity == 2)
10455 /* If we thought this was a unary operator, we now know
10456 it to be a binary operator. */
10457 switch (operator_code)
10460 operator_code = MULT_EXPR;
10464 operator_code = BIT_AND_EXPR;
10467 case UNARY_PLUS_EXPR:
10468 operator_code = PLUS_EXPR;
10472 operator_code = MINUS_EXPR;
10475 case PREINCREMENT_EXPR:
10476 operator_code = POSTINCREMENT_EXPR;
10479 case PREDECREMENT_EXPR:
10480 operator_code = POSTDECREMENT_EXPR;
10484 gcc_unreachable ();
10487 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
10489 if ((operator_code == POSTINCREMENT_EXPR
10490 || operator_code == POSTDECREMENT_EXPR)
10491 && ! processing_template_decl
10492 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes)), integer_type_node))
10495 error ("postfix %qD must take %<int%> as its argument",
10498 error ("postfix %qD must take %<int%> as its second "
10506 error ("%qD must take either zero or one argument", decl);
10508 error ("%qD must take either one or two arguments", decl);
10512 /* More Effective C++ rule 6. */
10514 && (operator_code == POSTINCREMENT_EXPR
10515 || operator_code == POSTDECREMENT_EXPR
10516 || operator_code == PREINCREMENT_EXPR
10517 || operator_code == PREDECREMENT_EXPR))
10519 tree arg = TREE_VALUE (argtypes);
10520 tree ret = TREE_TYPE (TREE_TYPE (decl));
10521 if (methodp || TREE_CODE (arg) == REFERENCE_TYPE)
10522 arg = TREE_TYPE (arg);
10523 arg = TYPE_MAIN_VARIANT (arg);
10524 if (operator_code == PREINCREMENT_EXPR
10525 || operator_code == PREDECREMENT_EXPR)
10527 if (TREE_CODE (ret) != REFERENCE_TYPE
10528 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret)),
10530 warning (OPT_Weffc__, "prefix %qD should return %qT", decl,
10531 build_reference_type (arg));
10535 if (!same_type_p (TYPE_MAIN_VARIANT (ret), arg))
10536 warning (OPT_Weffc__, "postfix %qD should return %qT", decl, arg);
10540 else if (unary_op_p (operator_code))
10545 error ("%qD must take %<void%>", decl);
10547 error ("%qD must take exactly one argument", decl);
10551 else /* if (binary_op_p (operator_code)) */
10556 error ("%qD must take exactly one argument", decl);
10558 error ("%qD must take exactly two arguments", decl);
10562 /* More Effective C++ rule 7. */
10564 && (operator_code == TRUTH_ANDIF_EXPR
10565 || operator_code == TRUTH_ORIF_EXPR
10566 || operator_code == COMPOUND_EXPR))
10567 warning (OPT_Weffc__, "user-defined %qD always evaluates both arguments",
10571 /* Effective C++ rule 23. */
10574 && !DECL_ASSIGNMENT_OPERATOR_P (decl)
10575 && (operator_code == PLUS_EXPR
10576 || operator_code == MINUS_EXPR
10577 || operator_code == TRUNC_DIV_EXPR
10578 || operator_code == MULT_EXPR
10579 || operator_code == TRUNC_MOD_EXPR)
10580 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl))) == REFERENCE_TYPE)
10581 warning (OPT_Weffc__, "%qD should return by value", decl);
10583 /* [over.oper]/8 */
10584 for (; argtypes && argtypes != void_list_node;
10585 argtypes = TREE_CHAIN (argtypes))
10586 if (TREE_PURPOSE (argtypes))
10588 TREE_PURPOSE (argtypes) = NULL_TREE;
10589 if (operator_code == POSTINCREMENT_EXPR
10590 || operator_code == POSTDECREMENT_EXPR)
10592 pedwarn (input_location, OPT_pedantic, "%qD cannot have default arguments",
10597 error ("%qD cannot have default arguments", decl);
10605 /* Return a string giving the keyword associate with CODE. */
10607 static const char *
10608 tag_name (enum tag_types code)
10620 case typename_type:
10623 gcc_unreachable ();
10627 /* Name lookup in an elaborated-type-specifier (after the keyword
10628 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
10629 elaborated-type-specifier is invalid, issue a diagnostic and return
10630 error_mark_node; otherwise, return the *_TYPE to which it referred.
10631 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
10634 check_elaborated_type_specifier (enum tag_types tag_code,
10636 bool allow_template_p)
10642 struct S { struct S *p; };
10644 name lookup will find the TYPE_DECL for the implicit "S::S"
10645 typedef. Adjust for that here. */
10646 if (DECL_SELF_REFERENCE_P (decl))
10647 decl = TYPE_NAME (TREE_TYPE (decl));
10649 type = TREE_TYPE (decl);
10651 /* Check TEMPLATE_TYPE_PARM first because DECL_IMPLICIT_TYPEDEF_P
10652 is false for this case as well. */
10653 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
10655 error ("using template type parameter %qT after %qs",
10656 type, tag_name (tag_code));
10657 return error_mark_node;
10661 If the identifier resolves to a typedef-name or a template
10662 type-parameter, the elaborated-type-specifier is ill-formed.
10664 In other words, the only legitimate declaration to use in the
10665 elaborated type specifier is the implicit typedef created when
10666 the type is declared. */
10667 else if (!DECL_IMPLICIT_TYPEDEF_P (decl)
10668 && !DECL_SELF_REFERENCE_P (decl)
10669 && tag_code != typename_type)
10671 error ("using typedef-name %qD after %qs", decl, tag_name (tag_code));
10672 error ("%q+D has a previous declaration here", decl);
10673 return error_mark_node;
10675 else if (TREE_CODE (type) != RECORD_TYPE
10676 && TREE_CODE (type) != UNION_TYPE
10677 && tag_code != enum_type
10678 && tag_code != typename_type)
10680 error ("%qT referred to as %qs", type, tag_name (tag_code));
10681 error ("%q+T has a previous declaration here", type);
10682 return error_mark_node;
10684 else if (TREE_CODE (type) != ENUMERAL_TYPE
10685 && tag_code == enum_type)
10687 error ("%qT referred to as enum", type);
10688 error ("%q+T has a previous declaration here", type);
10689 return error_mark_node;
10691 else if (!allow_template_p
10692 && TREE_CODE (type) == RECORD_TYPE
10693 && CLASSTYPE_IS_TEMPLATE (type))
10695 /* If a class template appears as elaborated type specifier
10696 without a template header such as:
10698 template <class T> class C {};
10699 void f(class C); // No template header here
10701 then the required template argument is missing. */
10702 error ("template argument required for %<%s %T%>",
10703 tag_name (tag_code),
10704 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type)));
10705 return error_mark_node;
10711 /* Lookup NAME in elaborate type specifier in scope according to
10712 SCOPE and issue diagnostics if necessary.
10713 Return *_TYPE node upon success, NULL_TREE when the NAME is not
10714 found, and ERROR_MARK_NODE for type error. */
10717 lookup_and_check_tag (enum tag_types tag_code, tree name,
10718 tag_scope scope, bool template_header_p)
10722 if (scope == ts_global)
10724 /* First try ordinary name lookup, ignoring hidden class name
10725 injected via friend declaration. */
10726 decl = lookup_name_prefer_type (name, 2);
10727 /* If that fails, the name will be placed in the smallest
10728 non-class, non-function-prototype scope according to 3.3.1/5.
10729 We may already have a hidden name declared as friend in this
10730 scope. So lookup again but not ignoring hidden names.
10731 If we find one, that name will be made visible rather than
10732 creating a new tag. */
10734 decl = lookup_type_scope (name, ts_within_enclosing_non_class);
10737 decl = lookup_type_scope (name, scope);
10739 if (decl && DECL_CLASS_TEMPLATE_P (decl))
10740 decl = DECL_TEMPLATE_RESULT (decl);
10742 if (decl && TREE_CODE (decl) == TYPE_DECL)
10744 /* Look for invalid nested type:
10748 if (scope == ts_current && DECL_SELF_REFERENCE_P (decl))
10750 error ("%qD has the same name as the class in which it is "
10753 return error_mark_node;
10756 /* Two cases we need to consider when deciding if a class
10757 template is allowed as an elaborated type specifier:
10758 1. It is a self reference to its own class.
10759 2. It comes with a template header.
10763 template <class T> class C {
10764 class C *c1; // DECL_SELF_REFERENCE_P is true
10767 template <class U> class C; // template_header_p is true
10768 template <class T> class C<T>::D {
10769 class C *c2; // DECL_SELF_REFERENCE_P is true
10772 t = check_elaborated_type_specifier (tag_code,
10775 | DECL_SELF_REFERENCE_P (decl));
10778 else if (decl && TREE_CODE (decl) == TREE_LIST)
10780 error ("reference to %qD is ambiguous", name);
10781 print_candidates (decl);
10782 return error_mark_node;
10788 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
10789 Define the tag as a forward-reference if it is not defined.
10791 If a declaration is given, process it here, and report an error if
10792 multiple declarations are not identical.
10794 SCOPE is TS_CURRENT when this is also a definition. Only look in
10795 the current frame for the name (since C++ allows new names in any
10796 scope.) It is TS_WITHIN_ENCLOSING_NON_CLASS if this is a friend
10797 declaration. Only look beginning from the current scope outward up
10798 till the nearest non-class scope. Otherwise it is TS_GLOBAL.
10800 TEMPLATE_HEADER_P is true when this declaration is preceded by
10801 a set of template parameters. */
10804 xref_tag (enum tag_types tag_code, tree name,
10805 tag_scope scope, bool template_header_p)
10807 enum tree_code code;
10809 tree context = NULL_TREE;
10811 timevar_push (TV_NAME_LOOKUP);
10813 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
10819 code = RECORD_TYPE;
10825 code = ENUMERAL_TYPE;
10828 gcc_unreachable ();
10831 /* In case of anonymous name, xref_tag is only called to
10832 make type node and push name. Name lookup is not required. */
10833 if (ANON_AGGRNAME_P (name))
10836 t = lookup_and_check_tag (tag_code, name,
10837 scope, template_header_p);
10839 if (t == error_mark_node)
10840 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
10842 if (scope != ts_current && t && current_class_type
10843 && template_class_depth (current_class_type)
10844 && template_header_p)
10846 /* Since SCOPE is not TS_CURRENT, we are not looking at a
10847 definition of this tag. Since, in addition, we are currently
10848 processing a (member) template declaration of a template
10849 class, we must be very careful; consider:
10856 { template <class V>
10857 friend struct S1; };
10859 Here, the S2::S1 declaration should not be confused with the
10860 outer declaration. In particular, the inner version should
10861 have a template parameter of level 2, not level 1. This
10862 would be particularly important if the member declaration
10865 template <class V = U> friend struct S1;
10867 say, when we should tsubst into `U' when instantiating
10868 S2. On the other hand, when presented with:
10878 we must find the inner binding eventually. We
10879 accomplish this by making sure that the new type we
10880 create to represent this declaration has the right
10882 context = TYPE_CONTEXT (t);
10888 /* If no such tag is yet defined, create a forward-reference node
10889 and record it as the "definition".
10890 When a real declaration of this type is found,
10891 the forward-reference will be altered into a real type. */
10892 if (code == ENUMERAL_TYPE)
10894 error ("use of enum %q#D without previous declaration", name);
10895 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
10899 t = make_class_type (code);
10900 TYPE_CONTEXT (t) = context;
10901 t = pushtag (name, t, scope);
10906 if (template_header_p && MAYBE_CLASS_TYPE_P (t))
10908 if (!redeclare_class_template (t, current_template_parms))
10909 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
10911 else if (!processing_template_decl
10912 && CLASS_TYPE_P (t)
10913 && CLASSTYPE_IS_TEMPLATE (t))
10915 error ("redeclaration of %qT as a non-template", t);
10916 error ("previous declaration %q+D", t);
10917 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
10920 /* Make injected friend class visible. */
10921 if (scope != ts_within_enclosing_non_class
10922 && hidden_name_p (TYPE_NAME (t)))
10924 DECL_ANTICIPATED (TYPE_NAME (t)) = 0;
10925 DECL_FRIEND_P (TYPE_NAME (t)) = 0;
10927 if (TYPE_TEMPLATE_INFO (t))
10929 DECL_ANTICIPATED (TYPE_TI_TEMPLATE (t)) = 0;
10930 DECL_FRIEND_P (TYPE_TI_TEMPLATE (t)) = 0;
10935 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, t);
10939 xref_tag_from_type (tree old, tree id, tag_scope scope)
10941 enum tag_types tag_kind;
10943 if (TREE_CODE (old) == RECORD_TYPE)
10944 tag_kind = (CLASSTYPE_DECLARED_CLASS (old) ? class_type : record_type);
10946 tag_kind = union_type;
10948 if (id == NULL_TREE)
10949 id = TYPE_IDENTIFIER (old);
10951 return xref_tag (tag_kind, id, scope, false);
10954 /* Create the binfo hierarchy for REF with (possibly NULL) base list
10955 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
10956 access_* node, and the TREE_VALUE is the type of the base-class.
10957 Non-NULL TREE_TYPE indicates virtual inheritance.
10959 Returns true if the binfo hierarchy was successfully created,
10960 false if an error was detected. */
10963 xref_basetypes (tree ref, tree base_list)
10966 tree binfo, base_binfo;
10967 unsigned max_vbases = 0; /* Maximum direct & indirect virtual bases. */
10968 unsigned max_bases = 0; /* Maximum direct bases. */
10970 tree default_access;
10971 tree igo_prev; /* Track Inheritance Graph Order. */
10973 if (ref == error_mark_node)
10976 /* The base of a derived class is private by default, all others are
10978 default_access = (TREE_CODE (ref) == RECORD_TYPE
10979 && CLASSTYPE_DECLARED_CLASS (ref)
10980 ? access_private_node : access_public_node);
10982 /* First, make sure that any templates in base-classes are
10983 instantiated. This ensures that if we call ourselves recursively
10984 we do not get confused about which classes are marked and which
10986 basep = &base_list;
10989 tree basetype = TREE_VALUE (*basep);
10991 if (!(processing_template_decl && uses_template_parms (basetype))
10992 && !complete_type_or_else (basetype, NULL))
10993 /* An incomplete type. Remove it from the list. */
10994 *basep = TREE_CHAIN (*basep);
10998 if (TREE_TYPE (*basep))
11000 if (CLASS_TYPE_P (basetype))
11001 max_vbases += VEC_length (tree, CLASSTYPE_VBASECLASSES (basetype));
11002 basep = &TREE_CHAIN (*basep);
11006 TYPE_MARKED_P (ref) = 1;
11008 /* The binfo slot should be empty, unless this is an (ill-formed)
11010 gcc_assert (!TYPE_BINFO (ref) || TYPE_SIZE (ref));
11011 gcc_assert (TYPE_MAIN_VARIANT (ref) == ref);
11013 binfo = make_tree_binfo (max_bases);
11015 TYPE_BINFO (ref) = binfo;
11016 BINFO_OFFSET (binfo) = size_zero_node;
11017 BINFO_TYPE (binfo) = ref;
11019 /* Apply base-class info set up to the variants of this type. */
11020 fixup_type_variants (ref);
11024 BINFO_BASE_ACCESSES (binfo) = VEC_alloc (tree, gc, max_bases);
11025 /* An aggregate cannot have baseclasses. */
11026 CLASSTYPE_NON_AGGREGATE (ref) = 1;
11028 if (TREE_CODE (ref) == UNION_TYPE)
11030 error ("derived union %qT invalid", ref);
11037 if (TYPE_FOR_JAVA (ref))
11039 error ("Java class %qT cannot have multiple bases", ref);
11046 CLASSTYPE_VBASECLASSES (ref) = VEC_alloc (tree, gc, max_vbases);
11048 if (TYPE_FOR_JAVA (ref))
11050 error ("Java class %qT cannot have virtual bases", ref);
11055 for (igo_prev = binfo; base_list; base_list = TREE_CHAIN (base_list))
11057 tree access = TREE_PURPOSE (base_list);
11058 int via_virtual = TREE_TYPE (base_list) != NULL_TREE;
11059 tree basetype = TREE_VALUE (base_list);
11061 if (access == access_default_node)
11062 access = default_access;
11064 if (PACK_EXPANSION_P (basetype))
11065 basetype = PACK_EXPANSION_PATTERN (basetype);
11066 if (TREE_CODE (basetype) == TYPE_DECL)
11067 basetype = TREE_TYPE (basetype);
11068 if (!MAYBE_CLASS_TYPE_P (basetype) || TREE_CODE (basetype) == UNION_TYPE)
11070 error ("base type %qT fails to be a struct or class type",
11075 if (TYPE_FOR_JAVA (basetype) && (current_lang_depth () == 0))
11076 TYPE_FOR_JAVA (ref) = 1;
11078 base_binfo = NULL_TREE;
11079 if (CLASS_TYPE_P (basetype) && !dependent_type_p (basetype))
11081 base_binfo = TYPE_BINFO (basetype);
11082 /* The original basetype could have been a typedef'd type. */
11083 basetype = BINFO_TYPE (base_binfo);
11085 /* Inherit flags from the base. */
11086 TYPE_HAS_NEW_OPERATOR (ref)
11087 |= TYPE_HAS_NEW_OPERATOR (basetype);
11088 TYPE_HAS_ARRAY_NEW_OPERATOR (ref)
11089 |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype);
11090 TYPE_GETS_DELETE (ref) |= TYPE_GETS_DELETE (basetype);
11091 TYPE_HAS_CONVERSION (ref) |= TYPE_HAS_CONVERSION (basetype);
11092 CLASSTYPE_DIAMOND_SHAPED_P (ref)
11093 |= CLASSTYPE_DIAMOND_SHAPED_P (basetype);
11094 CLASSTYPE_REPEATED_BASE_P (ref)
11095 |= CLASSTYPE_REPEATED_BASE_P (basetype);
11098 /* We must do this test after we've seen through a typedef
11100 if (TYPE_MARKED_P (basetype))
11102 if (basetype == ref)
11103 error ("recursive type %qT undefined", basetype);
11105 error ("duplicate base type %qT invalid", basetype);
11109 if (PACK_EXPANSION_P (TREE_VALUE (base_list)))
11110 /* Regenerate the pack expansion for the bases. */
11111 basetype = make_pack_expansion (basetype);
11113 TYPE_MARKED_P (basetype) = 1;
11115 base_binfo = copy_binfo (base_binfo, basetype, ref,
11116 &igo_prev, via_virtual);
11117 if (!BINFO_INHERITANCE_CHAIN (base_binfo))
11118 BINFO_INHERITANCE_CHAIN (base_binfo) = binfo;
11120 BINFO_BASE_APPEND (binfo, base_binfo);
11121 BINFO_BASE_ACCESS_APPEND (binfo, access);
11124 if (VEC_space (tree, CLASSTYPE_VBASECLASSES (ref), 1))
11125 /* If we have space in the vbase vector, we must have shared at
11126 least one of them, and are therefore diamond shaped. */
11127 CLASSTYPE_DIAMOND_SHAPED_P (ref) = 1;
11129 /* Unmark all the types. */
11130 for (i = 0; BINFO_BASE_ITERATE (binfo, i, base_binfo); i++)
11131 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
11132 TYPE_MARKED_P (ref) = 0;
11134 /* Now see if we have a repeated base type. */
11135 if (!CLASSTYPE_REPEATED_BASE_P (ref))
11137 for (base_binfo = binfo; base_binfo;
11138 base_binfo = TREE_CHAIN (base_binfo))
11140 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
11142 CLASSTYPE_REPEATED_BASE_P (ref) = 1;
11145 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 1;
11147 for (base_binfo = binfo; base_binfo;
11148 base_binfo = TREE_CHAIN (base_binfo))
11149 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
11150 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
11159 /* Begin compiling the definition of an enumeration type.
11162 UNDERLYING_TYPE is the type that will be used as the storage for
11163 the enumeration type. This should be NULL_TREE if no storage type
11166 SCOPED_ENUM_P is true if this is a scoped enumeration type.
11168 Returns the type object, as yet incomplete.
11169 Also records info about it so that build_enumerator
11170 may be used to declare the individual values as they are read. */
11173 start_enum (tree name, tree underlying_type, bool scoped_enum_p)
11177 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
11179 /* If this is the real definition for a previous forward reference,
11180 fill in the contents in the same object that used to be the
11181 forward reference. */
11183 enumtype = lookup_and_check_tag (enum_type, name,
11184 /*tag_scope=*/ts_current,
11185 /*template_header_p=*/false);
11187 if (enumtype != NULL_TREE && TREE_CODE (enumtype) == ENUMERAL_TYPE)
11189 error_at (input_location, "multiple definition of %q#T", enumtype);
11190 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype)),
11191 "previous definition here");
11192 /* Clear out TYPE_VALUES, and start again. */
11193 TYPE_VALUES (enumtype) = NULL_TREE;
11197 /* In case of error, make a dummy enum to allow parsing to
11199 if (enumtype == error_mark_node)
11200 name = make_anon_name ();
11202 enumtype = cxx_make_type (ENUMERAL_TYPE);
11203 enumtype = pushtag (name, enumtype, /*tag_scope=*/ts_current);
11206 if (enumtype == error_mark_node)
11211 SET_SCOPED_ENUM_P (enumtype, 1);
11212 begin_scope (sk_scoped_enum, enumtype);
11214 /* [C++0x dcl.enum]p5:
11216 If not explicitly specified, the underlying type of a scoped
11217 enumeration type is int. */
11218 if (!underlying_type)
11219 underlying_type = integer_type_node;
11222 if (underlying_type)
11224 if (CP_INTEGRAL_TYPE_P (underlying_type))
11226 TYPE_MIN_VALUE (enumtype) = TYPE_MIN_VALUE (underlying_type);
11227 TYPE_MAX_VALUE (enumtype) = TYPE_MAX_VALUE (underlying_type);
11228 TYPE_SIZE (enumtype) = TYPE_SIZE (underlying_type);
11229 TYPE_SIZE_UNIT (enumtype) = TYPE_SIZE_UNIT (underlying_type);
11230 SET_TYPE_MODE (enumtype, TYPE_MODE (underlying_type));
11231 TYPE_PRECISION (enumtype) = TYPE_PRECISION (underlying_type);
11232 TYPE_ALIGN (enumtype) = TYPE_ALIGN (underlying_type);
11233 TYPE_USER_ALIGN (enumtype) = TYPE_USER_ALIGN (underlying_type);
11234 TYPE_UNSIGNED (enumtype) = TYPE_UNSIGNED (underlying_type);
11235 ENUM_UNDERLYING_TYPE (enumtype) = underlying_type;
11237 else if (!dependent_type_p (underlying_type))
11238 error ("underlying type %<%T%> of %<%T%> must be an integral type",
11239 underlying_type, enumtype);
11245 /* After processing and defining all the values of an enumeration type,
11246 install their decls in the enumeration type and finish it off.
11247 ENUMTYPE is the type object and VALUES a list of name-value pairs. */
11250 finish_enum (tree enumtype)
11259 bool use_short_enum;
11264 tree underlying_type = NULL_TREE;
11265 bool fixed_underlying_type_p
11266 = ENUM_UNDERLYING_TYPE (enumtype) != NULL_TREE;
11268 /* We built up the VALUES in reverse order. */
11269 TYPE_VALUES (enumtype) = nreverse (TYPE_VALUES (enumtype));
11271 /* For an enum defined in a template, just set the type of the values;
11272 all further processing is postponed until the template is
11273 instantiated. We need to set the type so that tsubst of a CONST_DECL
11275 if (processing_template_decl)
11277 for (values = TYPE_VALUES (enumtype);
11279 values = TREE_CHAIN (values))
11280 TREE_TYPE (TREE_VALUE (values)) = enumtype;
11281 if (at_function_scope_p ())
11282 add_stmt (build_min (TAG_DEFN, enumtype));
11283 if (SCOPED_ENUM_P (enumtype))
11288 /* Determine the minimum and maximum values of the enumerators. */
11289 if (TYPE_VALUES (enumtype))
11291 minnode = maxnode = NULL_TREE;
11293 for (values = TYPE_VALUES (enumtype);
11295 values = TREE_CHAIN (values))
11297 decl = TREE_VALUE (values);
11299 /* [dcl.enum]: Following the closing brace of an enum-specifier,
11300 each enumerator has the type of its enumeration. Prior to the
11301 closing brace, the type of each enumerator is the type of its
11302 initializing value. */
11303 TREE_TYPE (decl) = enumtype;
11305 /* Update the minimum and maximum values, if appropriate. */
11306 value = DECL_INITIAL (decl);
11307 if (value == error_mark_node)
11308 value = integer_zero_node;
11309 /* Figure out what the minimum and maximum values of the
11310 enumerators are. */
11312 minnode = maxnode = value;
11313 else if (tree_int_cst_lt (maxnode, value))
11315 else if (tree_int_cst_lt (value, minnode))
11322 If the enumerator-list is empty, the underlying type is as if
11323 the enumeration had a single enumerator with value 0. */
11324 minnode = maxnode = integer_zero_node;
11326 /* Compute the number of bits require to represent all values of the
11327 enumeration. We must do this before the type of MINNODE and
11328 MAXNODE are transformed, since tree_int_cst_min_precision relies
11329 on the TREE_TYPE of the value it is passed. */
11330 unsignedp = tree_int_cst_sgn (minnode) >= 0;
11331 lowprec = tree_int_cst_min_precision (minnode, unsignedp);
11332 highprec = tree_int_cst_min_precision (maxnode, unsignedp);
11333 precision = MAX (lowprec, highprec);
11335 if (!fixed_underlying_type_p)
11337 /* Determine the underlying type of the enumeration.
11341 The underlying type of an enumeration is an integral type that
11342 can represent all the enumerator values defined in the
11343 enumeration. It is implementation-defined which integral type is
11344 used as the underlying type for an enumeration except that the
11345 underlying type shall not be larger than int unless the value of
11346 an enumerator cannot fit in an int or unsigned int.
11348 We use "int" or an "unsigned int" as the underlying type, even if
11349 a smaller integral type would work, unless the user has
11350 explicitly requested that we use the smallest possible type. The
11351 user can request that for all enumerations with a command line
11352 flag, or for just one enumeration with an attribute. */
11354 use_short_enum = flag_short_enums
11355 || lookup_attribute ("packed", TYPE_ATTRIBUTES (enumtype));
11357 for (itk = (use_short_enum ? itk_char : itk_int);
11361 underlying_type = integer_types[itk];
11362 if (TYPE_PRECISION (underlying_type) >= precision
11363 && TYPE_UNSIGNED (underlying_type) == unsignedp)
11366 if (itk == itk_none)
11370 IF no integral type can represent all the enumerator values, the
11371 enumeration is ill-formed. */
11372 error ("no integral type can represent all of the enumerator values "
11373 "for %qT", enumtype);
11374 precision = TYPE_PRECISION (long_long_integer_type_node);
11375 underlying_type = integer_types[itk_unsigned_long_long];
11380 The value of sizeof() applied to an enumeration type, an object
11381 of an enumeration type, or an enumerator, is the value of sizeof()
11382 applied to the underlying type. */
11383 TYPE_SIZE (enumtype) = TYPE_SIZE (underlying_type);
11384 TYPE_SIZE_UNIT (enumtype) = TYPE_SIZE_UNIT (underlying_type);
11385 SET_TYPE_MODE (enumtype, TYPE_MODE (underlying_type));
11386 TYPE_ALIGN (enumtype) = TYPE_ALIGN (underlying_type);
11387 TYPE_USER_ALIGN (enumtype) = TYPE_USER_ALIGN (underlying_type);
11388 TYPE_UNSIGNED (enumtype) = TYPE_UNSIGNED (underlying_type);
11390 /* Set the underlying type of the enumeration type to the
11391 computed enumeration type, restricted to the enumerator
11393 ENUM_UNDERLYING_TYPE (enumtype)
11394 = build_distinct_type_copy (underlying_type);
11395 set_min_and_max_values_for_integral_type
11396 (ENUM_UNDERLYING_TYPE (enumtype), precision, unsignedp);
11399 underlying_type = ENUM_UNDERLYING_TYPE (enumtype);
11401 /* Compute the minimum and maximum values for the type.
11405 For an enumeration where emin is the smallest enumerator and emax
11406 is the largest, the values of the enumeration are the values of the
11407 underlying type in the range bmin to bmax, where bmin and bmax are,
11408 respectively, the smallest and largest values of the smallest bit-
11409 field that can store emin and emax. */
11411 /* The middle-end currently assumes that types with TYPE_PRECISION
11412 narrower than their underlying type are suitably zero or sign
11413 extended to fill their mode. g++ doesn't make these guarantees.
11414 Until the middle-end can represent such paradoxical types, we
11415 set the TYPE_PRECISION to the width of the underlying type. */
11416 TYPE_PRECISION (enumtype) = TYPE_PRECISION (underlying_type);
11418 set_min_and_max_values_for_integral_type (enumtype, precision, unsignedp);
11420 /* Convert each of the enumerators to the type of the underlying
11421 type of the enumeration. */
11422 for (values = TYPE_VALUES (enumtype); values; values = TREE_CHAIN (values))
11424 location_t saved_location;
11426 decl = TREE_VALUE (values);
11427 saved_location = input_location;
11428 input_location = DECL_SOURCE_LOCATION (decl);
11429 if (fixed_underlying_type_p)
11430 /* If the enumeration type has a fixed underlying type, we
11431 already checked all of the enumerator values. */
11432 value = DECL_INITIAL (decl);
11434 value = perform_implicit_conversion (underlying_type,
11435 DECL_INITIAL (decl),
11436 tf_warning_or_error);
11437 input_location = saved_location;
11439 /* Do not clobber shared ints. */
11440 value = copy_node (value);
11442 TREE_TYPE (value) = enumtype;
11443 DECL_INITIAL (decl) = value;
11446 /* Fix up all variant types of this enum type. */
11447 for (t = TYPE_MAIN_VARIANT (enumtype); t; t = TYPE_NEXT_VARIANT (t))
11449 TYPE_VALUES (t) = TYPE_VALUES (enumtype);
11450 TYPE_MIN_VALUE (t) = TYPE_MIN_VALUE (enumtype);
11451 TYPE_MAX_VALUE (t) = TYPE_MAX_VALUE (enumtype);
11452 TYPE_SIZE (t) = TYPE_SIZE (enumtype);
11453 TYPE_SIZE_UNIT (t) = TYPE_SIZE_UNIT (enumtype);
11454 SET_TYPE_MODE (t, TYPE_MODE (enumtype));
11455 TYPE_PRECISION (t) = TYPE_PRECISION (enumtype);
11456 TYPE_ALIGN (t) = TYPE_ALIGN (enumtype);
11457 TYPE_USER_ALIGN (t) = TYPE_USER_ALIGN (enumtype);
11458 TYPE_UNSIGNED (t) = TYPE_UNSIGNED (enumtype);
11459 ENUM_UNDERLYING_TYPE (t) = ENUM_UNDERLYING_TYPE (enumtype);
11462 /* Finish up the scope of a scoped enumeration. */
11463 if (SCOPED_ENUM_P (enumtype))
11466 /* Finish debugging output for this type. */
11467 rest_of_type_compilation (enumtype, namespace_bindings_p ());
11470 /* Build and install a CONST_DECL for an enumeration constant of the
11471 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
11472 Assignment of sequential values by default is handled here. */
11475 build_enumerator (tree name, tree value, tree enumtype)
11481 /* If the VALUE was erroneous, pretend it wasn't there; that will
11482 result in the enum being assigned the next value in sequence. */
11483 if (value == error_mark_node)
11486 /* Remove no-op casts from the value. */
11488 STRIP_TYPE_NOPS (value);
11490 if (! processing_template_decl)
11492 /* Validate and default VALUE. */
11493 if (value != NULL_TREE)
11495 value = integral_constant_value (value);
11497 if (TREE_CODE (value) == INTEGER_CST)
11499 value = perform_integral_promotions (value);
11500 constant_expression_warning (value);
11504 error ("enumerator value for %qD is not an integer constant", name);
11509 /* Default based on previous value. */
11510 if (value == NULL_TREE)
11512 if (TYPE_VALUES (enumtype))
11515 unsigned HOST_WIDE_INT lo;
11519 /* The next value is the previous value plus one.
11520 add_double doesn't know the type of the target expression,
11521 so we must check with int_fits_type_p as well. */
11522 prev_value = DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype)));
11523 if (error_operand_p (prev_value))
11524 value = error_mark_node;
11527 overflowed = add_double (TREE_INT_CST_LOW (prev_value),
11528 TREE_INT_CST_HIGH (prev_value),
11530 value = build_int_cst_wide (TREE_TYPE (prev_value), lo, hi);
11532 |= !int_fits_type_p (value, TREE_TYPE (prev_value));
11536 error ("overflow in enumeration values at %qD", name);
11537 value = error_mark_node;
11542 value = integer_zero_node;
11545 /* Remove no-op casts from the value. */
11546 STRIP_TYPE_NOPS (value);
11548 /* If the underlying type of the enum is fixed, check whether
11549 the enumerator values fits in the underlying type. If it
11550 does not fit, the program is ill-formed [C++0x dcl.enum]. */
11551 if (ENUM_UNDERLYING_TYPE (enumtype)
11553 && TREE_CODE (value) == INTEGER_CST
11554 && !int_fits_type_p (value, ENUM_UNDERLYING_TYPE (enumtype)))
11556 error ("enumerator value %E is too large for underlying type %<%T%>",
11557 value, ENUM_UNDERLYING_TYPE (enumtype));
11559 /* Silently convert the value so that we can continue. */
11560 value = perform_implicit_conversion (ENUM_UNDERLYING_TYPE (enumtype),
11565 /* C++ associates enums with global, function, or class declarations. */
11566 context = current_scope ();
11568 /* Build the actual enumeration constant. Note that the enumeration
11569 constants have the underlying type of the enum (if it is fixed)
11570 or the type of their initializer (if the underlying type of the
11571 enum is not fixed):
11575 If the underlying type is fixed, the type of each enumerator
11576 prior to the closing brace is the underlying type; if the
11577 initializing value of an enumerator cannot be represented by
11578 the underlying type, the program is ill-formed. If the
11579 underlying type is not fixed, the type of each enumerator is
11580 the type of its initializing value.
11582 If the underlying type is not fixed, it will be computed by
11583 finish_enum and we will reset the type of this enumerator. Of
11584 course, if we're processing a template, there may be no value. */
11585 type = value ? TREE_TYPE (value) : NULL_TREE;
11587 if (context && context == current_class_type)
11588 /* This enum declaration is local to the class. We need the full
11589 lang_decl so that we can record DECL_CLASS_CONTEXT, for example. */
11590 decl = build_lang_decl (CONST_DECL, name, type);
11592 /* It's a global enum, or it's local to a function. (Note local to
11593 a function could mean local to a class method. */
11594 decl = build_decl (input_location, CONST_DECL, name, type);
11596 DECL_CONTEXT (decl) = FROB_CONTEXT (context);
11597 TREE_CONSTANT (decl) = 1;
11598 TREE_READONLY (decl) = 1;
11599 DECL_INITIAL (decl) = value;
11601 if (context && context == current_class_type && !SCOPED_ENUM_P (enumtype))
11602 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
11603 on the TYPE_FIELDS list for `S'. (That's so that you can say
11604 things like `S::i' later.) */
11605 finish_member_declaration (decl);
11609 /* Add this enumeration constant to the list for this type. */
11610 TYPE_VALUES (enumtype) = tree_cons (name, decl, TYPE_VALUES (enumtype));
11613 /* Look for an enumerator with the given NAME within the enumeration
11614 type ENUMTYPE. This routine is used primarily for qualified name
11615 lookup into an enumerator in C++0x, e.g.,
11617 enum class Color { Red, Green, Blue };
11619 Color color = Color::Red;
11621 Returns the value corresponding to the enumerator, or
11622 NULL_TREE if no such enumerator was found. */
11624 lookup_enumerator (tree enumtype, tree name)
11627 gcc_assert (enumtype && TREE_CODE (enumtype) == ENUMERAL_TYPE);
11629 e = purpose_member (name, TYPE_VALUES (enumtype));
11630 return e? TREE_VALUE (e) : NULL_TREE;
11634 /* We're defining DECL. Make sure that its type is OK. */
11637 check_function_type (tree decl, tree current_function_parms)
11639 tree fntype = TREE_TYPE (decl);
11640 tree return_type = complete_type (TREE_TYPE (fntype));
11642 /* In a function definition, arg types must be complete. */
11643 require_complete_types_for_parms (current_function_parms);
11645 /* constexpr functions must have literal argument types and
11646 literal return type. */
11647 validate_constexpr_fundecl (decl);
11649 if (dependent_type_p (return_type))
11651 if (!COMPLETE_OR_VOID_TYPE_P (return_type)
11652 || (TYPE_FOR_JAVA (return_type) && MAYBE_CLASS_TYPE_P (return_type)))
11654 tree args = TYPE_ARG_TYPES (fntype);
11656 if (!COMPLETE_OR_VOID_TYPE_P (return_type))
11657 error ("return type %q#T is incomplete", return_type);
11659 error ("return type has Java class type %q#T", return_type);
11661 /* Make it return void instead. */
11662 if (TREE_CODE (fntype) == METHOD_TYPE)
11663 fntype = build_method_type_directly (TREE_TYPE (TREE_VALUE (args)),
11665 TREE_CHAIN (args));
11667 fntype = build_function_type (void_type_node, args);
11669 = build_exception_variant (fntype,
11670 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (decl)));
11671 fntype = (cp_build_type_attribute_variant
11672 (fntype, TYPE_ATTRIBUTES (TREE_TYPE (decl))));
11673 TREE_TYPE (decl) = fntype;
11676 abstract_virtuals_error (decl, TREE_TYPE (fntype));
11679 /* Create the FUNCTION_DECL for a function definition.
11680 DECLSPECS and DECLARATOR are the parts of the declaration;
11681 they describe the function's name and the type it returns,
11682 but twisted together in a fashion that parallels the syntax of C.
11684 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
11685 DECLARATOR is really the DECL for the function we are about to
11686 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
11687 indicating that the function is an inline defined in-class.
11689 This function creates a binding context for the function body
11690 as well as setting up the FUNCTION_DECL in current_function_decl.
11692 For C++, we must first check whether that datum makes any sense.
11693 For example, "class A local_a(1,2);" means that variable local_a
11694 is an aggregate of type A, which should have a constructor
11695 applied to it with the argument list [1, 2].
11697 On entry, DECL_INITIAL (decl1) should be NULL_TREE or error_mark_node,
11698 or may be a BLOCK if the function has been defined previously
11699 in this translation unit. On exit, DECL_INITIAL (decl1) will be
11700 error_mark_node if the function has never been defined, or
11701 a BLOCK if the function has been defined somewhere. */
11704 start_preparsed_function (tree decl1, tree attrs, int flags)
11706 tree ctype = NULL_TREE;
11709 int doing_friend = 0;
11710 struct cp_binding_level *bl;
11711 tree current_function_parms;
11712 struct c_fileinfo *finfo
11713 = get_fileinfo (LOCATION_FILE (DECL_SOURCE_LOCATION (decl1)));
11714 bool honor_interface;
11716 /* Sanity check. */
11717 gcc_assert (TREE_CODE (TREE_VALUE (void_list_node)) == VOID_TYPE);
11718 gcc_assert (TREE_CHAIN (void_list_node) == NULL_TREE);
11720 fntype = TREE_TYPE (decl1);
11721 if (TREE_CODE (fntype) == METHOD_TYPE)
11722 ctype = TYPE_METHOD_BASETYPE (fntype);
11724 /* ISO C++ 11.4/5. A friend function defined in a class is in
11725 the (lexical) scope of the class in which it is defined. */
11726 if (!ctype && DECL_FRIEND_P (decl1))
11728 ctype = DECL_FRIEND_CONTEXT (decl1);
11730 /* CTYPE could be null here if we're dealing with a template;
11731 for example, `inline friend float foo()' inside a template
11732 will have no CTYPE set. */
11733 if (ctype && TREE_CODE (ctype) != RECORD_TYPE)
11739 if (DECL_DECLARED_INLINE_P (decl1)
11740 && lookup_attribute ("noinline", attrs))
11741 warning (0, "inline function %q+D given attribute noinline", decl1);
11743 /* Handle gnu_inline attribute. */
11744 if (GNU_INLINE_P (decl1))
11746 DECL_EXTERNAL (decl1) = 1;
11747 DECL_NOT_REALLY_EXTERN (decl1) = 0;
11748 DECL_INTERFACE_KNOWN (decl1) = 1;
11749 DECL_DISREGARD_INLINE_LIMITS (decl1) = 1;
11752 if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1))
11753 /* This is a constructor, we must ensure that any default args
11754 introduced by this definition are propagated to the clones
11755 now. The clones are used directly in overload resolution. */
11756 adjust_clone_args (decl1);
11758 /* Sometimes we don't notice that a function is a static member, and
11759 build a METHOD_TYPE for it. Fix that up now. */
11760 if (ctype != NULL_TREE && DECL_STATIC_FUNCTION_P (decl1)
11761 && TREE_CODE (TREE_TYPE (decl1)) == METHOD_TYPE)
11763 revert_static_member_fn (decl1);
11767 /* Set up current_class_type, and enter the scope of the class, if
11770 push_nested_class (ctype);
11771 else if (DECL_STATIC_FUNCTION_P (decl1))
11772 push_nested_class (DECL_CONTEXT (decl1));
11774 /* Now that we have entered the scope of the class, we must restore
11775 the bindings for any template parameters surrounding DECL1, if it
11776 is an inline member template. (Order is important; consider the
11777 case where a template parameter has the same name as a field of
11778 the class.) It is not until after this point that
11779 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
11780 if (flags & SF_INCLASS_INLINE)
11781 maybe_begin_member_template_processing (decl1);
11783 /* Effective C++ rule 15. */
11785 && DECL_OVERLOADED_OPERATOR_P (decl1) == NOP_EXPR
11786 && TREE_CODE (TREE_TYPE (fntype)) == VOID_TYPE)
11787 warning (OPT_Weffc__, "%<operator=%> should return a reference to %<*this%>");
11789 /* Make the init_value nonzero so pushdecl knows this is not tentative.
11790 error_mark_node is replaced below (in poplevel) with the BLOCK. */
11791 if (!DECL_INITIAL (decl1))
11792 DECL_INITIAL (decl1) = error_mark_node;
11794 /* This function exists in static storage.
11795 (This does not mean `static' in the C sense!) */
11796 TREE_STATIC (decl1) = 1;
11798 /* We must call push_template_decl after current_class_type is set
11799 up. (If we are processing inline definitions after exiting a
11800 class scope, current_class_type will be NULL_TREE until set above
11801 by push_nested_class.) */
11802 if (processing_template_decl)
11804 /* FIXME: Handle error_mark_node more gracefully. */
11805 tree newdecl1 = push_template_decl (decl1);
11806 if (newdecl1 != error_mark_node)
11810 /* We are now in the scope of the function being defined. */
11811 current_function_decl = decl1;
11813 /* Save the parm names or decls from this function's declarator
11814 where store_parm_decls will find them. */
11815 current_function_parms = DECL_ARGUMENTS (decl1);
11817 /* Make sure the parameter and return types are reasonable. When
11818 you declare a function, these types can be incomplete, but they
11819 must be complete when you define the function. */
11820 check_function_type (decl1, current_function_parms);
11822 /* Build the return declaration for the function. */
11823 restype = TREE_TYPE (fntype);
11824 if (DECL_RESULT (decl1) == NULL_TREE)
11828 resdecl = build_decl (input_location, RESULT_DECL, 0, restype);
11829 DECL_ARTIFICIAL (resdecl) = 1;
11830 DECL_IGNORED_P (resdecl) = 1;
11831 DECL_RESULT (decl1) = resdecl;
11833 cp_apply_type_quals_to_decl (cp_type_quals (restype), resdecl);
11836 /* Let the user know we're compiling this function. */
11837 announce_function (decl1);
11839 /* Record the decl so that the function name is defined.
11840 If we already have a decl for this name, and it is a FUNCTION_DECL,
11841 use the old decl. */
11842 if (!processing_template_decl && !(flags & SF_PRE_PARSED))
11844 /* A specialization is not used to guide overload resolution. */
11845 if (!DECL_FUNCTION_MEMBER_P (decl1)
11846 && !(DECL_USE_TEMPLATE (decl1) &&
11847 PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl1))))
11849 tree olddecl = pushdecl (decl1);
11851 if (olddecl == error_mark_node)
11852 /* If something went wrong when registering the declaration,
11853 use DECL1; we have to have a FUNCTION_DECL to use when
11854 parsing the body of the function. */
11858 /* Otherwise, OLDDECL is either a previous declaration
11859 of the same function or DECL1 itself. */
11861 if (warn_missing_declarations
11862 && olddecl == decl1
11863 && !DECL_MAIN_P (decl1)
11864 && TREE_PUBLIC (decl1)
11865 && !DECL_DECLARED_INLINE_P (decl1))
11869 /* Check whether DECL1 is in an anonymous
11871 for (context = DECL_CONTEXT (decl1);
11873 context = DECL_CONTEXT (context))
11875 if (TREE_CODE (context) == NAMESPACE_DECL
11876 && DECL_NAME (context) == NULL_TREE)
11880 if (context == NULL)
11881 warning (OPT_Wmissing_declarations,
11882 "no previous declaration for %q+D", decl1);
11890 /* We need to set the DECL_CONTEXT. */
11891 if (!DECL_CONTEXT (decl1) && DECL_TEMPLATE_INFO (decl1))
11892 DECL_CONTEXT (decl1) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1));
11894 fntype = TREE_TYPE (decl1);
11896 /* If #pragma weak applies, mark the decl appropriately now.
11897 The pragma only applies to global functions. Because
11898 determining whether or not the #pragma applies involves
11899 computing the mangled name for the declaration, we cannot
11900 apply the pragma until after we have merged this declaration
11901 with any previous declarations; if the original declaration
11902 has a linkage specification, that specification applies to
11903 the definition as well, and may affect the mangled name. */
11904 if (!DECL_CONTEXT (decl1))
11905 maybe_apply_pragma_weak (decl1);
11908 /* Reset this in case the call to pushdecl changed it. */
11909 current_function_decl = decl1;
11911 gcc_assert (DECL_INITIAL (decl1));
11913 /* This function may already have been parsed, in which case just
11914 return; our caller will skip over the body without parsing. */
11915 if (DECL_INITIAL (decl1) != error_mark_node)
11918 /* Initialize RTL machinery. We cannot do this until
11919 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
11920 even when processing a template; this is how we get
11921 CFUN set up, and our per-function variables initialized.
11922 FIXME factor out the non-RTL stuff. */
11923 bl = current_binding_level;
11924 allocate_struct_function (decl1, processing_template_decl);
11926 /* Initialize the language data structures. Whenever we start
11927 a new function, we destroy temporaries in the usual way. */
11928 cfun->language = GGC_CNEW (struct language_function);
11929 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
11930 current_binding_level = bl;
11932 /* Even though we're inside a function body, we still don't want to
11933 call expand_expr to calculate the size of a variable-sized array.
11934 We haven't necessarily assigned RTL to all variables yet, so it's
11935 not safe to try to expand expressions involving them. */
11936 cfun->dont_save_pending_sizes_p = 1;
11938 /* Start the statement-tree, start the tree now. */
11939 DECL_SAVED_TREE (decl1) = push_stmt_list ();
11941 /* If we are (erroneously) defining a function that we have already
11942 defined before, wipe out what we knew before. */
11943 if (!DECL_PENDING_INLINE_P (decl1))
11944 DECL_SAVED_FUNCTION_DATA (decl1) = NULL;
11946 if (ctype && !doing_friend && !DECL_STATIC_FUNCTION_P (decl1))
11948 /* We know that this was set up by `grokclassfn'. We do not
11949 wait until `store_parm_decls', since evil parse errors may
11950 never get us to that point. Here we keep the consistency
11951 between `current_class_type' and `current_class_ptr'. */
11952 tree t = DECL_ARGUMENTS (decl1);
11954 gcc_assert (t != NULL_TREE && TREE_CODE (t) == PARM_DECL);
11955 gcc_assert (TREE_CODE (TREE_TYPE (t)) == POINTER_TYPE);
11957 cp_function_chain->x_current_class_ref
11958 = cp_build_indirect_ref (t, RO_NULL, tf_warning_or_error);
11959 cp_function_chain->x_current_class_ptr = t;
11961 /* Constructors and destructors need to know whether they're "in
11962 charge" of initializing virtual base classes. */
11963 t = TREE_CHAIN (t);
11964 if (DECL_HAS_IN_CHARGE_PARM_P (decl1))
11966 current_in_charge_parm = t;
11967 t = TREE_CHAIN (t);
11969 if (DECL_HAS_VTT_PARM_P (decl1))
11971 gcc_assert (DECL_NAME (t) == vtt_parm_identifier);
11972 current_vtt_parm = t;
11976 honor_interface = (!DECL_TEMPLATE_INSTANTIATION (decl1)
11977 /* Implicitly-defined methods (like the
11978 destructor for a class in which no destructor
11979 is explicitly declared) must not be defined
11980 until their definition is needed. So, we
11981 ignore interface specifications for
11982 compiler-generated functions. */
11983 && !DECL_ARTIFICIAL (decl1));
11985 if (DECL_INTERFACE_KNOWN (decl1))
11987 tree ctx = decl_function_context (decl1);
11989 if (DECL_NOT_REALLY_EXTERN (decl1))
11990 DECL_EXTERNAL (decl1) = 0;
11992 if (ctx != NULL_TREE && DECL_DECLARED_INLINE_P (ctx)
11993 && TREE_PUBLIC (ctx))
11994 /* This is a function in a local class in an extern inline
11996 comdat_linkage (decl1);
11998 /* If this function belongs to an interface, it is public.
11999 If it belongs to someone else's interface, it is also external.
12000 This only affects inlines and template instantiations. */
12001 else if (!finfo->interface_unknown && honor_interface)
12003 if (DECL_DECLARED_INLINE_P (decl1)
12004 || DECL_TEMPLATE_INSTANTIATION (decl1)
12005 || processing_template_decl)
12007 DECL_EXTERNAL (decl1)
12008 = (finfo->interface_only
12009 || (DECL_DECLARED_INLINE_P (decl1)
12010 && ! flag_implement_inlines
12011 && !DECL_VINDEX (decl1)));
12013 /* For WIN32 we also want to put these in linkonce sections. */
12014 maybe_make_one_only (decl1);
12017 DECL_EXTERNAL (decl1) = 0;
12018 DECL_INTERFACE_KNOWN (decl1) = 1;
12019 /* If this function is in an interface implemented in this file,
12020 make sure that the back end knows to emit this function
12022 if (!DECL_EXTERNAL (decl1))
12023 mark_needed (decl1);
12025 else if (finfo->interface_unknown && finfo->interface_only
12026 && honor_interface)
12028 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
12029 interface, we will have both finfo->interface_unknown and
12030 finfo->interface_only set. In that case, we don't want to
12031 use the normal heuristics because someone will supply a
12032 #pragma implementation elsewhere, and deducing it here would
12033 produce a conflict. */
12034 comdat_linkage (decl1);
12035 DECL_EXTERNAL (decl1) = 0;
12036 DECL_INTERFACE_KNOWN (decl1) = 1;
12037 DECL_DEFER_OUTPUT (decl1) = 1;
12041 /* This is a definition, not a reference.
12042 So clear DECL_EXTERNAL, unless this is a GNU extern inline. */
12043 if (!GNU_INLINE_P (decl1))
12044 DECL_EXTERNAL (decl1) = 0;
12046 if ((DECL_DECLARED_INLINE_P (decl1)
12047 || DECL_TEMPLATE_INSTANTIATION (decl1))
12048 && ! DECL_INTERFACE_KNOWN (decl1))
12049 DECL_DEFER_OUTPUT (decl1) = 1;
12051 DECL_INTERFACE_KNOWN (decl1) = 1;
12054 /* Determine the ELF visibility attribute for the function. We must not
12055 do this before calling "pushdecl", as we must allow "duplicate_decls"
12056 to merge any attributes appropriately. We also need to wait until
12058 if (!DECL_CLONED_FUNCTION_P (decl1))
12059 determine_visibility (decl1);
12061 begin_scope (sk_function_parms, decl1);
12065 if (DECL_DESTRUCTOR_P (decl1)
12066 || (DECL_CONSTRUCTOR_P (decl1)
12067 && targetm.cxx.cdtor_returns_this ()))
12069 cdtor_label = build_decl (input_location,
12070 LABEL_DECL, NULL_TREE, NULL_TREE);
12071 DECL_CONTEXT (cdtor_label) = current_function_decl;
12074 start_fname_decls ();
12076 store_parm_decls (current_function_parms);
12080 /* Like start_preparsed_function, except that instead of a
12081 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
12083 Returns 1 on success. If the DECLARATOR is not suitable for a function
12084 (it defines a datum instead), we return 0, which tells
12085 yyparse to report a parse error. */
12088 start_function (cp_decl_specifier_seq *declspecs,
12089 const cp_declarator *declarator,
12094 decl1 = grokdeclarator (declarator, declspecs, FUNCDEF, 1, &attrs);
12095 if (decl1 == error_mark_node)
12097 /* If the declarator is not suitable for a function definition,
12098 cause a syntax error. */
12099 if (decl1 == NULL_TREE || TREE_CODE (decl1) != FUNCTION_DECL)
12101 error ("invalid function declaration");
12105 if (DECL_MAIN_P (decl1))
12106 /* main must return int. grokfndecl should have corrected it
12107 (and issued a diagnostic) if the user got it wrong. */
12108 gcc_assert (same_type_p (TREE_TYPE (TREE_TYPE (decl1)),
12109 integer_type_node));
12111 start_preparsed_function (decl1, attrs, /*flags=*/SF_DEFAULT);
12116 /* Returns true iff an EH_SPEC_BLOCK should be created in the body of
12120 use_eh_spec_block (tree fn)
12122 return (flag_exceptions && flag_enforce_eh_specs
12123 && !processing_template_decl
12124 && TYPE_RAISES_EXCEPTIONS (TREE_TYPE (fn))
12125 /* We insert the EH_SPEC_BLOCK only in the original
12126 function; then, it is copied automatically to the
12128 && !DECL_CLONED_FUNCTION_P (fn)
12129 /* Implicitly-generated constructors and destructors have
12130 exception specifications. However, those specifications
12131 are the union of the possible exceptions specified by the
12132 constructors/destructors for bases and members, so no
12133 unallowed exception will ever reach this function. By
12134 not creating the EH_SPEC_BLOCK we save a little memory,
12135 and we avoid spurious warnings about unreachable
12137 && !DECL_ARTIFICIAL (fn));
12140 /* Store the parameter declarations into the current function declaration.
12141 This is called after parsing the parameter declarations, before
12142 digesting the body of the function.
12144 Also install to binding contour return value identifier, if any. */
12147 store_parm_decls (tree current_function_parms)
12149 tree fndecl = current_function_decl;
12152 /* This is a chain of any other decls that came in among the parm
12153 declarations. If a parm is declared with enum {foo, bar} x;
12154 then CONST_DECLs for foo and bar are put here. */
12155 tree nonparms = NULL_TREE;
12157 if (current_function_parms)
12159 /* This case is when the function was defined with an ANSI prototype.
12160 The parms already have decls, so we need not do anything here
12161 except record them as in effect
12162 and complain if any redundant old-style parm decls were written. */
12164 tree specparms = current_function_parms;
12167 /* Must clear this because it might contain TYPE_DECLs declared
12169 current_binding_level->names = NULL;
12171 /* If we're doing semantic analysis, then we'll call pushdecl
12172 for each of these. We must do them in reverse order so that
12173 they end in the correct forward order. */
12174 specparms = nreverse (specparms);
12176 for (parm = specparms; parm; parm = next)
12178 next = TREE_CHAIN (parm);
12179 if (TREE_CODE (parm) == PARM_DECL)
12181 if (DECL_NAME (parm) == NULL_TREE
12182 || TREE_CODE (parm) != VOID_TYPE)
12185 error ("parameter %qD declared void", parm);
12189 /* If we find an enum constant or a type tag,
12190 put it aside for the moment. */
12191 TREE_CHAIN (parm) = NULL_TREE;
12192 nonparms = chainon (nonparms, parm);
12196 /* Get the decls in their original chain order and record in the
12197 function. This is all and only the PARM_DECLs that were
12198 pushed into scope by the loop above. */
12199 DECL_ARGUMENTS (fndecl) = getdecls ();
12202 DECL_ARGUMENTS (fndecl) = NULL_TREE;
12204 /* Now store the final chain of decls for the arguments
12205 as the decl-chain of the current lexical scope.
12206 Put the enumerators in as well, at the front so that
12207 DECL_ARGUMENTS is not modified. */
12208 current_binding_level->names = chainon (nonparms, DECL_ARGUMENTS (fndecl));
12210 if (use_eh_spec_block (current_function_decl))
12211 current_eh_spec_block = begin_eh_spec_block ();
12215 /* We have finished doing semantic analysis on DECL, but have not yet
12216 generated RTL for its body. Save away our current state, so that
12217 when we want to generate RTL later we know what to do. */
12220 save_function_data (tree decl)
12222 struct language_function *f;
12224 /* Save the language-specific per-function data so that we can
12225 get it back when we really expand this function. */
12226 gcc_assert (!DECL_PENDING_INLINE_P (decl));
12229 f = GGC_NEW (struct language_function);
12230 memcpy (f, cp_function_chain, sizeof (struct language_function));
12231 DECL_SAVED_FUNCTION_DATA (decl) = f;
12233 /* Clear out the bits we don't need. */
12234 f->base.x_stmt_tree.x_cur_stmt_list = NULL_TREE;
12235 f->bindings = NULL;
12236 f->x_local_names = NULL;
12240 /* Set the return value of the constructor (if present). */
12243 finish_constructor_body (void)
12248 if (targetm.cxx.cdtor_returns_this ()
12249 && (! TYPE_FOR_JAVA (current_class_type)))
12251 /* Any return from a constructor will end up here. */
12252 add_stmt (build_stmt (input_location, LABEL_EXPR, cdtor_label));
12254 val = DECL_ARGUMENTS (current_function_decl);
12255 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
12256 DECL_RESULT (current_function_decl), val);
12257 /* Return the address of the object. */
12258 exprstmt = build_stmt (input_location, RETURN_EXPR, val);
12259 add_stmt (exprstmt);
12263 /* Do all the processing for the beginning of a destructor; set up the
12264 vtable pointers and cleanups for bases and members. */
12267 begin_destructor_body (void)
12269 tree compound_stmt;
12271 /* If the CURRENT_CLASS_TYPE is incomplete, we will have already
12272 issued an error message. We still want to try to process the
12273 body of the function, but initialize_vtbl_ptrs will crash if
12274 TYPE_BINFO is NULL. */
12275 if (COMPLETE_TYPE_P (current_class_type))
12277 compound_stmt = begin_compound_stmt (0);
12278 /* Make all virtual function table pointers in non-virtual base
12279 classes point to CURRENT_CLASS_TYPE's virtual function
12281 initialize_vtbl_ptrs (current_class_ptr);
12282 finish_compound_stmt (compound_stmt);
12284 /* And insert cleanups for our bases and members so that they
12285 will be properly destroyed if we throw. */
12286 push_base_cleanups ();
12290 /* At the end of every destructor we generate code to delete the object if
12291 necessary. Do that now. */
12294 finish_destructor_body (void)
12298 /* Any return from a destructor will end up here; that way all base
12299 and member cleanups will be run when the function returns. */
12300 add_stmt (build_stmt (input_location, LABEL_EXPR, cdtor_label));
12302 /* In a virtual destructor, we must call delete. */
12303 if (DECL_VIRTUAL_P (current_function_decl))
12306 tree virtual_size = cxx_sizeof (current_class_type);
12310 At the point of definition of a virtual destructor (including
12311 an implicit definition), non-placement operator delete shall
12312 be looked up in the scope of the destructor's class and if
12313 found shall be accessible and unambiguous. */
12314 exprstmt = build_op_delete_call(DELETE_EXPR, current_class_ptr,
12316 /*global_p=*/false,
12317 /*placement=*/NULL_TREE,
12318 /*alloc_fn=*/NULL_TREE);
12320 if_stmt = begin_if_stmt ();
12321 finish_if_stmt_cond (build2 (BIT_AND_EXPR, integer_type_node,
12322 current_in_charge_parm,
12325 finish_expr_stmt (exprstmt);
12326 finish_then_clause (if_stmt);
12327 finish_if_stmt (if_stmt);
12330 if (targetm.cxx.cdtor_returns_this ())
12334 val = DECL_ARGUMENTS (current_function_decl);
12335 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
12336 DECL_RESULT (current_function_decl), val);
12337 /* Return the address of the object. */
12338 exprstmt = build_stmt (input_location, RETURN_EXPR, val);
12339 add_stmt (exprstmt);
12343 /* Do the necessary processing for the beginning of a function body, which
12344 in this case includes member-initializers, but not the catch clauses of
12345 a function-try-block. Currently, this means opening a binding level
12346 for the member-initializers (in a ctor) and member cleanups (in a dtor). */
12349 begin_function_body (void)
12353 if (! FUNCTION_NEEDS_BODY_BLOCK (current_function_decl))
12356 if (processing_template_decl)
12357 /* Do nothing now. */;
12359 /* Always keep the BLOCK node associated with the outermost pair of
12360 curly braces of a function. These are needed for correct
12361 operation of dwarfout.c. */
12362 keep_next_level (true);
12364 stmt = begin_compound_stmt (BCS_FN_BODY);
12366 if (processing_template_decl)
12367 /* Do nothing now. */;
12368 else if (DECL_DESTRUCTOR_P (current_function_decl))
12369 begin_destructor_body ();
12374 /* Do the processing for the end of a function body. Currently, this means
12375 closing out the cleanups for fully-constructed bases and members, and in
12376 the case of the destructor, deleting the object if desired. Again, this
12377 is only meaningful for [cd]tors, since they are the only functions where
12378 there is a significant distinction between the main body and any
12379 function catch clauses. Handling, say, main() return semantics here
12380 would be wrong, as flowing off the end of a function catch clause for
12381 main() would also need to return 0. */
12384 finish_function_body (tree compstmt)
12386 if (compstmt == NULL_TREE)
12389 /* Close the block. */
12390 finish_compound_stmt (compstmt);
12392 if (processing_template_decl)
12393 /* Do nothing now. */;
12394 else if (DECL_CONSTRUCTOR_P (current_function_decl))
12395 finish_constructor_body ();
12396 else if (DECL_DESTRUCTOR_P (current_function_decl))
12397 finish_destructor_body ();
12400 /* Given a function, returns the BLOCK corresponding to the outermost level
12401 of curly braces, skipping the artificial block created for constructor
12405 outer_curly_brace_block (tree fndecl)
12407 tree block = BLOCK_SUBBLOCKS (DECL_INITIAL (fndecl));
12408 if (FUNCTION_NEEDS_BODY_BLOCK (current_function_decl))
12409 /* Skip the artificial function body block. */
12410 block = BLOCK_SUBBLOCKS (block);
12414 /* Finish up a function declaration and compile that function
12415 all the way to assembler language output. The free the storage
12416 for the function definition.
12418 FLAGS is a bitwise or of the following values:
12420 We just finished processing the body of an in-class inline
12421 function definition. (This processing will have taken place
12422 after the class definition is complete.) */
12425 finish_function (int flags)
12427 tree fndecl = current_function_decl;
12428 tree fntype, ctype = NULL_TREE;
12429 int inclass_inline = (flags & 2) != 0;
12432 /* When we get some parse errors, we can end up without a
12433 current_function_decl, so cope. */
12434 if (fndecl == NULL_TREE)
12435 return error_mark_node;
12437 gcc_assert (!defer_mark_used_calls);
12438 defer_mark_used_calls = true;
12440 if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fndecl)
12441 && DECL_VIRTUAL_P (fndecl)
12442 && !processing_template_decl)
12444 tree fnclass = DECL_CONTEXT (fndecl);
12445 if (fndecl == CLASSTYPE_KEY_METHOD (fnclass))
12446 keyed_classes = tree_cons (NULL_TREE, fnclass, keyed_classes);
12449 nested = function_depth > 1;
12450 fntype = TREE_TYPE (fndecl);
12452 /* TREE_READONLY (fndecl) = 1;
12453 This caused &foo to be of type ptr-to-const-function
12454 which then got a warning when stored in a ptr-to-function variable. */
12456 gcc_assert (building_stmt_tree ());
12457 /* The current function is being defined, so its DECL_INITIAL should
12458 be set, and unless there's a multiple definition, it should be
12459 error_mark_node. */
12460 gcc_assert (DECL_INITIAL (fndecl) == error_mark_node);
12462 /* For a cloned function, we've already got all the code we need;
12463 there's no need to add any extra bits. */
12464 if (!DECL_CLONED_FUNCTION_P (fndecl))
12466 if (DECL_MAIN_P (current_function_decl))
12470 /* Make it so that `main' always returns 0 by default (or
12473 stmt = finish_return_stmt (integer_one_node);
12475 stmt = finish_return_stmt (integer_zero_node);
12477 /* Hack. We don't want the middle-end to warn that this
12478 return is unreachable, so put the statement on the
12481 location_t linezero = linemap_line_start (line_table, 0, 1);
12482 SET_EXPR_LOCATION (stmt, linezero);
12486 if (use_eh_spec_block (current_function_decl))
12487 finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
12488 (TREE_TYPE (current_function_decl)),
12489 current_eh_spec_block);
12492 /* If we're saving up tree structure, tie off the function now. */
12493 DECL_SAVED_TREE (fndecl) = pop_stmt_list (DECL_SAVED_TREE (fndecl));
12495 finish_fname_decls ();
12497 /* If this function can't throw any exceptions, remember that. */
12498 if (!processing_template_decl
12499 && !cp_function_chain->can_throw
12500 && !flag_non_call_exceptions
12501 && !DECL_REPLACEABLE_P (fndecl))
12502 TREE_NOTHROW (fndecl) = 1;
12504 /* This must come after expand_function_end because cleanups might
12505 have declarations (from inline functions) that need to go into
12506 this function's blocks. */
12508 /* If the current binding level isn't the outermost binding level
12509 for this function, either there is a bug, or we have experienced
12510 syntax errors and the statement tree is malformed. */
12511 if (current_binding_level->kind != sk_function_parms)
12513 /* Make sure we have already experienced errors. */
12514 gcc_assert (errorcount);
12516 /* Throw away the broken statement tree and extra binding
12518 DECL_SAVED_TREE (fndecl) = alloc_stmt_list ();
12520 while (current_binding_level->kind != sk_function_parms)
12522 if (current_binding_level->kind == sk_class)
12523 pop_nested_class ();
12525 poplevel (0, 0, 0);
12528 poplevel (1, 0, 1);
12530 /* Statements should always be full-expressions at the outermost set
12531 of curly braces for a function. */
12532 gcc_assert (stmts_are_full_exprs_p ());
12534 /* Set up the named return value optimization, if we can. Candidate
12535 variables are selected in check_return_expr. */
12536 if (current_function_return_value)
12538 tree r = current_function_return_value;
12541 if (r != error_mark_node
12542 /* This is only worth doing for fns that return in memory--and
12543 simpler, since we don't have to worry about promoted modes. */
12544 && aggregate_value_p (TREE_TYPE (TREE_TYPE (fndecl)), fndecl)
12545 /* Only allow this for variables declared in the outer scope of
12546 the function so we know that their lifetime always ends with a
12547 return; see g++.dg/opt/nrv6.C. We could be more flexible if
12548 we were to do this optimization in tree-ssa. */
12549 && (outer = outer_curly_brace_block (fndecl))
12550 && chain_member (r, BLOCK_VARS (outer)))
12551 finalize_nrv (&DECL_SAVED_TREE (fndecl), r, DECL_RESULT (fndecl));
12553 current_function_return_value = NULL_TREE;
12556 /* Remember that we were in class scope. */
12557 if (current_class_name)
12558 ctype = current_class_type;
12560 /* Must mark the RESULT_DECL as being in this function. */
12561 DECL_CONTEXT (DECL_RESULT (fndecl)) = fndecl;
12563 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
12564 to the FUNCTION_DECL node itself. */
12565 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl)) = fndecl;
12567 /* Save away current state, if appropriate. */
12568 if (!processing_template_decl)
12569 save_function_data (fndecl);
12571 /* Complain if there's just no return statement. */
12572 if (warn_return_type
12573 && TREE_CODE (TREE_TYPE (fntype)) != VOID_TYPE
12574 && !dependent_type_p (TREE_TYPE (fntype))
12575 && !current_function_returns_value && !current_function_returns_null
12576 /* Don't complain if we abort or throw. */
12577 && !current_function_returns_abnormally
12578 /* Don't complain if we are declared noreturn. */
12579 && !TREE_THIS_VOLATILE (fndecl)
12580 && !DECL_NAME (DECL_RESULT (fndecl))
12581 && !TREE_NO_WARNING (fndecl)
12582 /* Structor return values (if any) are set by the compiler. */
12583 && !DECL_CONSTRUCTOR_P (fndecl)
12584 && !DECL_DESTRUCTOR_P (fndecl))
12586 warning (OPT_Wreturn_type,
12587 "no return statement in function returning non-void");
12588 TREE_NO_WARNING (fndecl) = 1;
12591 /* Store the end of the function, so that we get good line number
12592 info for the epilogue. */
12593 cfun->function_end_locus = input_location;
12595 /* Genericize before inlining. */
12596 if (!processing_template_decl)
12598 struct language_function *f = DECL_SAVED_FUNCTION_DATA (fndecl);
12599 invoke_plugin_callbacks (PLUGIN_PRE_GENERICIZE, fndecl);
12600 cp_genericize (fndecl);
12601 /* Clear out the bits we don't need. */
12602 f->x_current_class_ptr = NULL;
12603 f->x_current_class_ref = NULL;
12604 f->x_eh_spec_block = NULL;
12605 f->x_in_charge_parm = NULL;
12606 f->x_vtt_parm = NULL;
12607 f->x_return_value = NULL;
12608 f->bindings = NULL;
12609 f->extern_decl_map = NULL;
12611 /* Clear out the bits we don't need. */
12612 local_names = NULL;
12614 /* We're leaving the context of this function, so zap cfun. It's still in
12615 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
12617 current_function_decl = NULL;
12619 /* If this is an in-class inline definition, we may have to pop the
12620 bindings for the template parameters that we added in
12621 maybe_begin_member_template_processing when start_function was
12623 if (inclass_inline)
12624 maybe_end_member_template_processing ();
12626 /* Leave the scope of the class. */
12628 pop_nested_class ();
12634 /* Let the error reporting routines know that we're outside a
12635 function. For a nested function, this value is used in
12636 cxx_pop_function_context and then reset via pop_function_context. */
12637 current_function_decl = NULL_TREE;
12639 defer_mark_used_calls = false;
12640 if (deferred_mark_used_calls)
12645 for (i = 0; VEC_iterate (tree, deferred_mark_used_calls, i, decl); i++)
12647 VEC_free (tree, gc, deferred_mark_used_calls);
12653 /* Create the FUNCTION_DECL for a function definition.
12654 DECLSPECS and DECLARATOR are the parts of the declaration;
12655 they describe the return type and the name of the function,
12656 but twisted together in a fashion that parallels the syntax of C.
12658 This function creates a binding context for the function body
12659 as well as setting up the FUNCTION_DECL in current_function_decl.
12661 Returns a FUNCTION_DECL on success.
12663 If the DECLARATOR is not suitable for a function (it defines a datum
12664 instead), we return 0, which tells yyparse to report a parse error.
12666 May return void_type_node indicating that this method is actually
12667 a friend. See grokfield for more details.
12669 Came here with a `.pushlevel' .
12671 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
12672 CHANGES TO CODE IN `grokfield'. */
12675 grokmethod (cp_decl_specifier_seq *declspecs,
12676 const cp_declarator *declarator, tree attrlist)
12678 tree fndecl = grokdeclarator (declarator, declspecs, MEMFUNCDEF, 0,
12681 if (fndecl == error_mark_node)
12682 return error_mark_node;
12684 if (fndecl == NULL || TREE_CODE (fndecl) != FUNCTION_DECL)
12686 error ("invalid member function declaration");
12687 return error_mark_node;
12691 cplus_decl_attributes (&fndecl, attrlist, 0);
12693 /* Pass friends other than inline friend functions back. */
12694 if (fndecl == void_type_node)
12697 if (DECL_IN_AGGR_P (fndecl))
12699 if (DECL_CONTEXT (fndecl)
12700 && TREE_CODE (DECL_CONTEXT (fndecl)) != NAMESPACE_DECL)
12701 error ("%qD is already defined in class %qT", fndecl,
12702 DECL_CONTEXT (fndecl));
12703 return error_mark_node;
12706 check_template_shadow (fndecl);
12708 DECL_DECLARED_INLINE_P (fndecl) = 1;
12709 DECL_NO_INLINE_WARNING_P (fndecl) = 1;
12711 /* We process method specializations in finish_struct_1. */
12712 if (processing_template_decl && !DECL_TEMPLATE_SPECIALIZATION (fndecl))
12714 fndecl = push_template_decl (fndecl);
12715 if (fndecl == error_mark_node)
12719 if (! DECL_FRIEND_P (fndecl))
12721 if (TREE_CHAIN (fndecl))
12723 fndecl = copy_node (fndecl);
12724 TREE_CHAIN (fndecl) = NULL_TREE;
12728 cp_finish_decl (fndecl, NULL_TREE, false, NULL_TREE, 0);
12730 DECL_IN_AGGR_P (fndecl) = 1;
12735 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
12736 we can lay it out later, when and if its type becomes complete. */
12739 maybe_register_incomplete_var (tree var)
12741 gcc_assert (TREE_CODE (var) == VAR_DECL);
12743 /* Keep track of variables with incomplete types. */
12744 if (!processing_template_decl && TREE_TYPE (var) != error_mark_node
12745 && DECL_EXTERNAL (var))
12747 tree inner_type = TREE_TYPE (var);
12749 while (TREE_CODE (inner_type) == ARRAY_TYPE)
12750 inner_type = TREE_TYPE (inner_type);
12751 inner_type = TYPE_MAIN_VARIANT (inner_type);
12753 if ((!COMPLETE_TYPE_P (inner_type) && CLASS_TYPE_P (inner_type))
12754 /* RTTI TD entries are created while defining the type_info. */
12755 || (TYPE_LANG_SPECIFIC (inner_type)
12756 && TYPE_BEING_DEFINED (inner_type)))
12757 incomplete_vars = tree_cons (inner_type, var, incomplete_vars);
12761 /* Called when a class type (given by TYPE) is defined. If there are
12762 any existing VAR_DECLs whose type has been completed by this
12763 declaration, update them now. */
12766 complete_vars (tree type)
12768 tree *list = &incomplete_vars;
12770 gcc_assert (CLASS_TYPE_P (type));
12773 if (same_type_p (type, TREE_PURPOSE (*list)))
12775 tree var = TREE_VALUE (*list);
12776 tree type = TREE_TYPE (var);
12777 /* Complete the type of the variable. The VAR_DECL itself
12778 will be laid out in expand_expr. */
12779 complete_type (type);
12780 cp_apply_type_quals_to_decl (cp_type_quals (type), var);
12781 /* Remove this entry from the list. */
12782 *list = TREE_CHAIN (*list);
12785 list = &TREE_CHAIN (*list);
12788 /* Check for pending declarations which may have abstract type. */
12789 complete_type_check_abstract (type);
12792 /* If DECL is of a type which needs a cleanup, build and return an
12793 expression to perform that cleanup here. Return NULL_TREE if no
12794 cleanup need be done. */
12797 cxx_maybe_build_cleanup (tree decl)
12803 /* Assume no cleanup is required. */
12804 cleanup = NULL_TREE;
12806 if (error_operand_p (decl))
12809 /* Handle "__attribute__((cleanup))". We run the cleanup function
12810 before the destructor since the destructor is what actually
12811 terminates the lifetime of the object. */
12812 attr = lookup_attribute ("cleanup", DECL_ATTRIBUTES (decl));
12819 /* Get the name specified by the user for the cleanup function. */
12820 id = TREE_VALUE (TREE_VALUE (attr));
12821 /* Look up the name to find the cleanup function to call. It is
12822 important to use lookup_name here because that is what is
12823 used in c-common.c:handle_cleanup_attribute when performing
12824 initial checks on the attribute. Note that those checks
12825 include ensuring that the function found is not an overloaded
12826 function, or an object with an overloaded call operator,
12827 etc.; we can rely on the fact that the function found is an
12828 ordinary FUNCTION_DECL. */
12829 fn = lookup_name (id);
12830 arg = build_address (decl);
12832 cleanup = cp_build_function_call (fn, build_tree_list (NULL_TREE,
12834 tf_warning_or_error);
12836 /* Handle ordinary C++ destructors. */
12837 type = TREE_TYPE (decl);
12838 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
12840 int flags = LOOKUP_NORMAL|LOOKUP_DESTRUCTOR;
12841 bool has_vbases = (TREE_CODE (type) == RECORD_TYPE
12842 && CLASSTYPE_VBASECLASSES (type));
12846 if (TREE_CODE (type) == ARRAY_TYPE)
12849 addr = build_address (decl);
12851 /* Optimize for space over speed here. */
12852 if (!has_vbases || flag_expensive_optimizations)
12853 flags |= LOOKUP_NONVIRTUAL;
12855 call = build_delete (TREE_TYPE (addr), addr,
12856 sfk_complete_destructor, flags, 0);
12858 cleanup = build_compound_expr (input_location, cleanup, call);
12866 /* When a stmt has been parsed, this function is called. */
12873 /* Return the FUNCTION_TYPE that corresponds to MEMFNTYPE, which can be a
12874 FUNCTION_DECL, METHOD_TYPE, FUNCTION_TYPE, pointer or reference to
12875 METHOD_TYPE or FUNCTION_TYPE, or pointer to member function. */
12878 static_fn_type (tree memfntype)
12884 if (TYPE_PTRMEMFUNC_P (memfntype))
12885 memfntype = TYPE_PTRMEMFUNC_FN_TYPE (memfntype);
12886 if (POINTER_TYPE_P (memfntype)
12887 || TREE_CODE (memfntype) == FUNCTION_DECL)
12888 memfntype = TREE_TYPE (memfntype);
12889 if (TREE_CODE (memfntype) == FUNCTION_TYPE)
12891 gcc_assert (TREE_CODE (memfntype) == METHOD_TYPE);
12892 args = TYPE_ARG_TYPES (memfntype);
12893 fntype = build_function_type (TREE_TYPE (memfntype), TREE_CHAIN (args));
12894 quals = cp_type_quals (TREE_TYPE (TREE_VALUE (args)));
12895 fntype = build_qualified_type (fntype, quals);
12896 fntype = (cp_build_type_attribute_variant
12897 (fntype, TYPE_ATTRIBUTES (memfntype)));
12898 fntype = (build_exception_variant
12899 (fntype, TYPE_RAISES_EXCEPTIONS (memfntype)));
12903 /* DECL was originally constructed as a non-static member function,
12904 but turned out to be static. Update it accordingly. */
12907 revert_static_member_fn (tree decl)
12909 TREE_TYPE (decl) = static_fn_type (decl);
12911 if (cp_type_quals (TREE_TYPE (decl)) != TYPE_UNQUALIFIED)
12912 error ("static member function %q#D declared with type qualifiers", decl);
12914 if (DECL_ARGUMENTS (decl))
12915 DECL_ARGUMENTS (decl) = TREE_CHAIN (DECL_ARGUMENTS (decl));
12916 DECL_STATIC_FUNCTION_P (decl) = 1;
12919 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
12920 one of the language-independent trees. */
12922 enum cp_tree_node_structure_enum
12923 cp_tree_node_structure (union lang_tree_node * t)
12925 switch (TREE_CODE (&t->generic))
12927 case DEFAULT_ARG: return TS_CP_DEFAULT_ARG;
12928 case IDENTIFIER_NODE: return TS_CP_IDENTIFIER;
12929 case OVERLOAD: return TS_CP_OVERLOAD;
12930 case TEMPLATE_PARM_INDEX: return TS_CP_TPI;
12931 case PTRMEM_CST: return TS_CP_PTRMEM;
12932 case BASELINK: return TS_CP_BASELINK;
12933 case STATIC_ASSERT: return TS_CP_STATIC_ASSERT;
12934 case ARGUMENT_PACK_SELECT: return TS_CP_ARGUMENT_PACK_SELECT;
12935 case TRAIT_EXPR: return TS_CP_TRAIT_EXPR;
12936 case LAMBDA_EXPR: return TS_CP_LAMBDA_EXPR;
12937 case TEMPLATE_INFO: return TS_CP_TEMPLATE_INFO;
12938 default: return TS_CP_GENERIC;
12942 /* Build the void_list_node (void_type_node having been created). */
12944 build_void_list_node (void)
12946 tree t = build_tree_list (NULL_TREE, void_type_node);
12951 cp_missing_noreturn_ok_p (tree decl)
12953 /* A missing noreturn is ok for the `main' function. */
12954 return DECL_MAIN_P (decl);
12957 /* Return the COMDAT group into which DECL should be placed. */
12960 cxx_comdat_group (tree decl)
12964 /* Virtual tables, construction virtual tables, and virtual table
12965 tables all go in a single COMDAT group, named after the primary
12967 if (TREE_CODE (decl) == VAR_DECL && DECL_VTABLE_OR_VTT_P (decl))
12968 name = DECL_ASSEMBLER_NAME (CLASSTYPE_VTABLES (DECL_CONTEXT (decl)));
12969 /* For all other DECLs, the COMDAT group is the mangled name of the
12970 declaration itself. */
12973 while (DECL_THUNK_P (decl))
12975 /* If TARGET_USE_LOCAL_THUNK_ALIAS_P, use_thunk puts the thunk
12976 into the same section as the target function. In that case
12977 we must return target's name. */
12978 tree target = THUNK_TARGET (decl);
12979 if (TARGET_USE_LOCAL_THUNK_ALIAS_P (target)
12980 && DECL_SECTION_NAME (target) != NULL
12981 && DECL_ONE_ONLY (target))
12986 name = DECL_ASSEMBLER_NAME (decl);
12992 #include "gt-cp-decl.h"