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"
38 #include "tree-iterator.h"
39 #include "tree-inline.h"
50 #include "diagnostic.h"
54 #include "tree-flow.h"
55 #include "pointer-set.h"
56 #include "splay-tree.h"
59 #include "rtl.h" /* For decl_default_tls_model. */
61 static tree grokparms (tree parmlist, tree *);
62 static const char *redeclaration_error_message (tree, tree);
64 static int decl_jump_unsafe (tree);
65 static void require_complete_types_for_parms (tree);
66 static int ambi_op_p (enum tree_code);
67 static int unary_op_p (enum tree_code);
68 static void push_local_name (tree);
69 static tree grok_reference_init (tree, tree, tree, tree *);
70 static tree grokvardecl (tree, tree, const cp_decl_specifier_seq *,
72 static void record_unknown_type (tree, const char *);
73 static tree builtin_function_1 (tree, tree, bool);
74 static tree build_library_fn_1 (tree, enum tree_code, tree);
75 static int member_function_or_else (tree, tree, enum overload_flags);
76 static void bad_specifiers (tree, const char *, int, int, int, int,
78 static void check_for_uninitialized_const_var (tree);
79 static hashval_t typename_hash (const void *);
80 static int typename_compare (const void *, const void *);
81 static tree local_variable_p_walkfn (tree *, int *, void *);
82 static tree record_builtin_java_type (const char *, int);
83 static const char *tag_name (enum tag_types);
84 static tree lookup_and_check_tag (enum tag_types, tree, tag_scope, bool);
85 static int walk_namespaces_r (tree, walk_namespaces_fn, void *);
86 static void maybe_deduce_size_from_array_init (tree, tree);
87 static void layout_var_decl (tree);
88 static tree check_initializer (tree, tree, int, tree *);
89 static void make_rtl_for_nonlocal_decl (tree, tree, const char *);
90 static void save_function_data (tree);
91 static void check_function_type (tree, tree);
92 static void finish_constructor_body (void);
93 static void begin_destructor_body (void);
94 static void finish_destructor_body (void);
95 static tree create_array_type_for_decl (tree, tree, tree);
96 static tree get_atexit_node (void);
97 static tree get_dso_handle_node (void);
98 static tree start_cleanup_fn (void);
99 static void end_cleanup_fn (void);
100 static tree cp_make_fname_decl (location_t, tree, int);
101 static void initialize_predefined_identifiers (void);
102 static tree check_special_function_return_type
103 (special_function_kind, tree, tree);
104 static tree push_cp_library_fn (enum tree_code, tree);
105 static tree build_cp_library_fn (tree, enum tree_code, tree);
106 static void store_parm_decls (tree);
107 static void initialize_local_var (tree, tree);
108 static void expand_static_init (tree, tree);
110 /* The following symbols are subsumed in the cp_global_trees array, and
111 listed here individually for documentation purposes.
114 tree wchar_decl_node;
116 tree vtable_entry_type;
117 tree delta_type_node;
118 tree __t_desc_type_node;
120 tree class_type_node;
121 tree unknown_type_node;
123 Array type `vtable_entry_type[]'
126 tree vtbl_ptr_type_node;
133 A FUNCTION_DECL which can call `abort'. Not necessarily the
134 one that the user will declare, but sufficient to be called
135 by routines that want to abort the program.
139 The FUNCTION_DECL for the default `::operator delete'.
141 tree global_delete_fndecl;
144 tree type_info_type_node, tinfo_decl_id, tinfo_decl_type;
145 tree tinfo_var_id; */
147 tree cp_global_trees[CPTI_MAX];
149 /* Indicates that there is a type value in some namespace, although
150 that is not necessarily in scope at the moment. */
152 tree global_type_node;
154 /* The node that holds the "name" of the global scope. */
155 tree global_scope_name;
157 #define local_names cp_function_chain->x_local_names
159 /* A list of objects which have constructors or destructors
160 which reside in the global scope. The decl is stored in
161 the TREE_VALUE slot and the initializer is stored
162 in the TREE_PURPOSE slot. */
163 tree static_aggregates;
167 /* A node for the integer constants 2, and 3. */
169 tree integer_two_node, integer_three_node;
171 /* Used only for jumps to as-yet undefined labels, since jumps to
172 defined labels can have their validity checked immediately. */
174 struct GTY(()) named_label_use_entry {
175 struct named_label_use_entry *next;
176 /* The binding level to which this entry is *currently* attached.
177 This is initially the binding level in which the goto appeared,
178 but is modified as scopes are closed. */
179 struct cp_binding_level *binding_level;
180 /* The head of the names list that was current when the goto appeared,
181 or the inner scope popped. These are the decls that will *not* be
182 skipped when jumping to the label. */
184 /* The location of the goto, for error reporting. */
185 location_t o_goto_locus;
186 /* True if an OpenMP structured block scope has been closed since
187 the goto appeared. This means that the branch from the label will
188 illegally exit an OpenMP scope. */
192 /* A list of all LABEL_DECLs in the function that have names. Here so
193 we can clear out their names' definitions at the end of the
194 function, and so we can check the validity of jumps to these labels. */
196 struct GTY(()) named_label_entry {
197 /* The decl itself. */
200 /* The binding level to which the label is *currently* attached.
201 This is initially set to the binding level in which the label
202 is defined, but is modified as scopes are closed. */
203 struct cp_binding_level *binding_level;
204 /* The head of the names list that was current when the label was
205 defined, or the inner scope popped. These are the decls that will
206 be skipped when jumping to the label. */
208 /* A tree list of all decls from all binding levels that would be
209 crossed by a backward branch to the label. */
212 /* A list of uses of the label, before the label is defined. */
213 struct named_label_use_entry *uses;
215 /* The following bits are set after the label is defined, and are
216 updated as scopes are popped. They indicate that a backward jump
217 to the label will illegally enter a scope of the given flavor. */
223 #define named_labels cp_function_chain->x_named_labels
225 /* The number of function bodies which we are currently processing.
226 (Zero if we are at namespace scope, one inside the body of a
227 function, two inside the body of a function in a local class, etc.) */
230 /* To avoid unwanted recursion, finish_function defers all mark_used calls
231 encountered during its execution until it finishes. */
232 bool defer_mark_used_calls;
233 VEC(tree, gc) *deferred_mark_used_calls;
235 /* States indicating how grokdeclarator() should handle declspecs marked
236 with __attribute__((deprecated)). An object declared as
237 __attribute__((deprecated)) suppresses warnings of uses of other
239 enum deprecated_states deprecated_state = DEPRECATED_NORMAL;
242 /* A TREE_LIST of VAR_DECLs. The TREE_PURPOSE is a RECORD_TYPE or
243 UNION_TYPE; the TREE_VALUE is a VAR_DECL with that type. At the
244 time the VAR_DECL was declared, the type was incomplete. */
246 static GTY(()) tree incomplete_vars;
248 /* Returns the kind of template specialization we are currently
249 processing, given that it's declaration contained N_CLASS_SCOPES
250 explicit scope qualifications. */
253 current_tmpl_spec_kind (int n_class_scopes)
255 int n_template_parm_scopes = 0;
256 int seen_specialization_p = 0;
257 int innermost_specialization_p = 0;
258 struct cp_binding_level *b;
260 /* Scan through the template parameter scopes. */
261 for (b = current_binding_level;
262 b->kind == sk_template_parms;
265 /* If we see a specialization scope inside a parameter scope,
266 then something is wrong. That corresponds to a declaration
269 template <class T> template <> ...
271 which is always invalid since [temp.expl.spec] forbids the
272 specialization of a class member template if the enclosing
273 class templates are not explicitly specialized as well. */
274 if (b->explicit_spec_p)
276 if (n_template_parm_scopes == 0)
277 innermost_specialization_p = 1;
279 seen_specialization_p = 1;
281 else if (seen_specialization_p == 1)
282 return tsk_invalid_member_spec;
284 ++n_template_parm_scopes;
287 /* Handle explicit instantiations. */
288 if (processing_explicit_instantiation)
290 if (n_template_parm_scopes != 0)
291 /* We've seen a template parameter list during an explicit
292 instantiation. For example:
294 template <class T> template void f(int);
296 This is erroneous. */
297 return tsk_invalid_expl_inst;
299 return tsk_expl_inst;
302 if (n_template_parm_scopes < n_class_scopes)
303 /* We've not seen enough template headers to match all the
304 specialized classes present. For example:
306 template <class T> void R<T>::S<T>::f(int);
308 This is invalid; there needs to be one set of template
309 parameters for each class. */
310 return tsk_insufficient_parms;
311 else if (n_template_parm_scopes == n_class_scopes)
312 /* We're processing a non-template declaration (even though it may
313 be a member of a template class.) For example:
315 template <class T> void S<T>::f(int);
317 The `class T' matches the `S<T>', leaving no template headers
318 corresponding to the `f'. */
320 else if (n_template_parm_scopes > n_class_scopes + 1)
321 /* We've got too many template headers. For example:
323 template <> template <class T> void f (T);
325 There need to be more enclosing classes. */
326 return tsk_excessive_parms;
328 /* This must be a template. It's of the form:
330 template <class T> template <class U> void S<T>::f(U);
332 This is a specialization if the innermost level was a
333 specialization; otherwise it's just a definition of the
335 return innermost_specialization_p ? tsk_expl_spec : tsk_template;
338 /* Exit the current scope. */
346 /* When a label goes out of scope, check to see if that label was used
347 in a valid manner, and issue any appropriate warnings or errors. */
350 pop_label (tree label, tree old_value)
352 if (!processing_template_decl)
354 if (DECL_INITIAL (label) == NULL_TREE)
358 error ("label %q+D used but not defined", label);
359 location = input_location; /* FIXME want (input_filename, (line)0) */
360 /* Avoid crashing later. */
361 define_label (location, DECL_NAME (label));
364 warn_for_unused_label (label);
367 SET_IDENTIFIER_LABEL_VALUE (DECL_NAME (label), old_value);
370 /* At the end of a function, all labels declared within the function
371 go out of scope. BLOCK is the top-level block for the
375 pop_labels_1 (void **slot, void *data)
377 struct named_label_entry *ent = (struct named_label_entry *) *slot;
378 tree block = (tree) data;
380 pop_label (ent->label_decl, NULL_TREE);
382 /* Put the labels into the "variables" of the top-level block,
383 so debugger can see them. */
384 TREE_CHAIN (ent->label_decl) = BLOCK_VARS (block);
385 BLOCK_VARS (block) = ent->label_decl;
387 htab_clear_slot (named_labels, slot);
393 pop_labels (tree block)
397 htab_traverse (named_labels, pop_labels_1, block);
402 /* At the end of a block with local labels, restore the outer definition. */
405 pop_local_label (tree label, tree old_value)
407 struct named_label_entry dummy;
410 pop_label (label, old_value);
412 dummy.label_decl = label;
413 slot = htab_find_slot (named_labels, &dummy, NO_INSERT);
414 htab_clear_slot (named_labels, slot);
417 /* The following two routines are used to interface to Objective-C++.
418 The binding level is purposely treated as an opaque type. */
421 objc_get_current_scope (void)
423 return current_binding_level;
426 /* The following routine is used by the NeXT-style SJLJ exceptions;
427 variables get marked 'volatile' so as to not be clobbered by
428 _setjmp()/_longjmp() calls. All variables in the current scope,
429 as well as parent scopes up to (but not including) ENCLOSING_BLK
430 shall be thusly marked. */
433 objc_mark_locals_volatile (void *enclosing_blk)
435 struct cp_binding_level *scope;
437 for (scope = current_binding_level;
438 scope && scope != enclosing_blk;
439 scope = scope->level_chain)
443 for (decl = scope->names; decl; decl = TREE_CHAIN (decl))
444 objc_volatilize_decl (decl);
446 /* Do not climb up past the current function. */
447 if (scope->kind == sk_function_parms)
452 /* Update data for defined and undefined labels when leaving a scope. */
455 poplevel_named_label_1 (void **slot, void *data)
457 struct named_label_entry *ent = (struct named_label_entry *) *slot;
458 struct cp_binding_level *bl = (struct cp_binding_level *) data;
459 struct cp_binding_level *obl = bl->level_chain;
461 if (ent->binding_level == bl)
465 for (decl = ent->names_in_scope; decl; decl = TREE_CHAIN (decl))
466 if (decl_jump_unsafe (decl))
467 ent->bad_decls = tree_cons (NULL, decl, ent->bad_decls);
469 ent->binding_level = obl;
470 ent->names_in_scope = obl->names;
474 ent->in_try_scope = true;
477 ent->in_catch_scope = true;
480 ent->in_omp_scope = true;
488 struct named_label_use_entry *use;
490 for (use = ent->uses; use ; use = use->next)
491 if (use->binding_level == bl)
493 use->binding_level = obl;
494 use->names_in_scope = obl->names;
495 if (bl->kind == sk_omp)
496 use->in_omp_scope = true;
503 /* Saved errorcount to avoid -Wunused-but-set-{parameter,variable} warnings
504 when errors were reported, except for -Werror-unused-but-set-*. */
505 static int unused_but_set_errorcount;
507 /* Exit a binding level.
508 Pop the level off, and restore the state of the identifier-decl mappings
509 that were in effect when this level was entered.
511 If KEEP == 1, this level had explicit declarations, so
512 and create a "block" (a BLOCK node) for the level
513 to record its declarations and subblocks for symbol table output.
515 If FUNCTIONBODY is nonzero, this level is the body of a function,
516 so create a block as if KEEP were set and also clear out all
519 If REVERSE is nonzero, reverse the order of decls before putting
520 them into the BLOCK. */
523 poplevel (int keep, int reverse, int functionbody)
526 /* The chain of decls was accumulated in reverse order.
527 Put it into forward order, just for cleanliness. */
532 int leaving_for_scope;
535 timevar_push (TV_NAME_LOOKUP);
540 gcc_assert (current_binding_level->kind != sk_class);
542 if (current_binding_level->kind == sk_cleanup)
544 subblocks = functionbody >= 0 ? current_binding_level->blocks : 0;
546 gcc_assert (!VEC_length(cp_class_binding,
547 current_binding_level->class_shadowed));
549 /* We used to use KEEP == 2 to indicate that the new block should go
550 at the beginning of the list of blocks at this binding level,
551 rather than the end. This hack is no longer used. */
552 gcc_assert (keep == 0 || keep == 1);
554 if (current_binding_level->keep)
557 /* Any uses of undefined labels, and any defined labels, now operate
558 under constraints of next binding contour. */
559 if (cfun && !functionbody && named_labels)
560 htab_traverse (named_labels, poplevel_named_label_1,
561 current_binding_level);
563 /* Get the decls in the order they were written.
564 Usually current_binding_level->names is in reverse order.
565 But parameter decls were previously put in forward order. */
568 current_binding_level->names
569 = decls = nreverse (current_binding_level->names);
571 decls = current_binding_level->names;
573 /* If there were any declarations or structure tags in that level,
574 or if this level is a function body,
575 create a BLOCK to record them for the life of this function. */
577 if (keep == 1 || functionbody)
578 block = make_node (BLOCK);
579 if (block != NULL_TREE)
581 BLOCK_VARS (block) = decls;
582 BLOCK_SUBBLOCKS (block) = subblocks;
585 /* In each subblock, record that this is its superior. */
587 for (link = subblocks; link; link = BLOCK_CHAIN (link))
588 BLOCK_SUPERCONTEXT (link) = block;
590 /* We still support the old for-scope rules, whereby the variables
591 in a for-init statement were in scope after the for-statement
592 ended. We only use the new rules if flag_new_for_scope is
595 = current_binding_level->kind == sk_for && flag_new_for_scope == 1;
597 /* Before we remove the declarations first check for unused variables. */
598 if ((warn_unused_variable || warn_unused_but_set_variable)
599 && !processing_template_decl)
600 for (decl = getdecls (); decl; decl = TREE_CHAIN (decl))
601 if (TREE_CODE (decl) == VAR_DECL
602 && (! TREE_USED (decl) || !DECL_READ_P (decl))
603 && ! DECL_IN_SYSTEM_HEADER (decl)
604 && DECL_NAME (decl) && ! DECL_ARTIFICIAL (decl))
606 if (! TREE_USED (decl))
607 warning (OPT_Wunused_variable, "unused variable %q+D", decl);
608 else if (DECL_CONTEXT (decl) == current_function_decl
609 && TREE_TYPE (decl) != error_mark_node
610 && TREE_CODE (TREE_TYPE (decl)) != REFERENCE_TYPE
611 && errorcount == unused_but_set_errorcount
612 && (!CLASS_TYPE_P (TREE_TYPE (decl))
613 || !TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl))))
615 warning (OPT_Wunused_but_set_variable,
616 "variable %q+D set but not used", decl);
617 unused_but_set_errorcount = errorcount;
621 /* Remove declarations for all the DECLs in this level. */
622 for (link = decls; link; link = TREE_CHAIN (link))
624 if (leaving_for_scope && TREE_CODE (link) == VAR_DECL
627 tree name = DECL_NAME (link);
631 ob = outer_binding (name,
632 IDENTIFIER_BINDING (name),
635 ns_binding = IDENTIFIER_NAMESPACE_VALUE (name);
637 ns_binding = NULL_TREE;
639 if (ob && ob->scope == current_binding_level->level_chain)
640 /* We have something like:
645 and we are leaving the `for' scope. There's no reason to
646 keep the binding of the inner `i' in this case. */
647 pop_binding (name, link);
648 else if ((ob && (TREE_CODE (ob->value) == TYPE_DECL))
649 || (ns_binding && TREE_CODE (ns_binding) == TYPE_DECL))
650 /* Here, we have something like:
658 We must pop the for-scope binding so we know what's a
659 type and what isn't. */
660 pop_binding (name, link);
663 /* Mark this VAR_DECL as dead so that we can tell we left it
664 there only for backward compatibility. */
665 DECL_DEAD_FOR_LOCAL (link) = 1;
667 /* Keep track of what should have happened when we
668 popped the binding. */
671 SET_DECL_SHADOWED_FOR_VAR (link, ob->value);
672 DECL_HAS_SHADOWED_FOR_VAR_P (link) = 1;
675 /* Add it to the list of dead variables in the next
676 outermost binding to that we can remove these when we
677 leave that binding. */
678 current_binding_level->level_chain->dead_vars_from_for
679 = tree_cons (NULL_TREE, link,
680 current_binding_level->level_chain->
683 /* Although we don't pop the cxx_binding, we do clear
684 its SCOPE since the scope is going away now. */
685 IDENTIFIER_BINDING (name)->scope
686 = current_binding_level->level_chain;
693 /* Remove the binding. */
696 if (TREE_CODE (decl) == TREE_LIST)
697 decl = TREE_VALUE (decl);
700 if (TREE_CODE (name) == OVERLOAD)
701 name = OVL_FUNCTION (name);
703 gcc_assert (DECL_P (name));
704 pop_binding (DECL_NAME (name), decl);
708 /* Remove declarations for any `for' variables from inner scopes
709 that we kept around. */
710 for (link = current_binding_level->dead_vars_from_for;
711 link; link = TREE_CHAIN (link))
712 pop_binding (DECL_NAME (TREE_VALUE (link)), TREE_VALUE (link));
714 /* Restore the IDENTIFIER_TYPE_VALUEs. */
715 for (link = current_binding_level->type_shadowed;
716 link; link = TREE_CHAIN (link))
717 SET_IDENTIFIER_TYPE_VALUE (TREE_PURPOSE (link), TREE_VALUE (link));
719 /* Restore the IDENTIFIER_LABEL_VALUEs for local labels. */
720 for (link = current_binding_level->shadowed_labels;
722 link = TREE_CHAIN (link))
723 pop_local_label (TREE_VALUE (link), TREE_PURPOSE (link));
725 /* There may be OVERLOADs (wrapped in TREE_LISTs) on the BLOCK_VARs
726 list if a `using' declaration put them there. The debugging
727 back ends won't understand OVERLOAD, so we remove them here.
728 Because the BLOCK_VARS are (temporarily) shared with
729 CURRENT_BINDING_LEVEL->NAMES we must do this fixup after we have
730 popped all the bindings. */
735 for (d = &BLOCK_VARS (block); *d; )
737 if (TREE_CODE (*d) == TREE_LIST)
738 *d = TREE_CHAIN (*d);
740 d = &TREE_CHAIN (*d);
744 /* If the level being exited is the top level of a function,
745 check over all the labels. */
748 /* Since this is the top level block of a function, the vars are
749 the function's parameters. Don't leave them in the BLOCK
750 because they are found in the FUNCTION_DECL instead. */
751 BLOCK_VARS (block) = 0;
755 kind = current_binding_level->kind;
756 if (kind == sk_cleanup)
760 /* If this is a temporary binding created for a cleanup, then we'll
761 have pushed a statement list level. Pop that, create a new
762 BIND_EXPR for the block, and insert it into the stream. */
763 stmt = pop_stmt_list (current_binding_level->statement_list);
764 stmt = c_build_bind_expr (input_location, block, stmt);
771 /* The current function is being defined, so its DECL_INITIAL
772 should be error_mark_node. */
773 gcc_assert (DECL_INITIAL (current_function_decl) == error_mark_node);
774 DECL_INITIAL (current_function_decl) = block;
777 current_binding_level->blocks
778 = chainon (current_binding_level->blocks, block);
780 /* If we did not make a block for the level just exited,
781 any blocks made for inner levels
782 (since they cannot be recorded as subblocks in that level)
783 must be carried forward so they will later become subblocks
784 of something else. */
786 current_binding_level->blocks
787 = chainon (current_binding_level->blocks, subblocks);
789 /* Each and every BLOCK node created here in `poplevel' is important
790 (e.g. for proper debugging information) so if we created one
791 earlier, mark it as "used". */
793 TREE_USED (block) = 1;
795 /* All temporary bindings created for cleanups are popped silently. */
796 if (kind == sk_cleanup)
799 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, block);
802 /* Walk all the namespaces contained NAMESPACE, including NAMESPACE
803 itself, calling F for each. The DATA is passed to F as well. */
806 walk_namespaces_r (tree name_space, walk_namespaces_fn f, void* data)
809 tree current = NAMESPACE_LEVEL (name_space)->namespaces;
811 result |= (*f) (name_space, data);
813 for (; current; current = TREE_CHAIN (current))
814 result |= walk_namespaces_r (current, f, data);
819 /* Walk all the namespaces, calling F for each. The DATA is passed to
823 walk_namespaces (walk_namespaces_fn f, void* data)
825 return walk_namespaces_r (global_namespace, f, data);
828 /* Call wrapup_globals_declarations for the globals in NAMESPACE. If
829 DATA is non-NULL, this is the last time we will call
830 wrapup_global_declarations for this NAMESPACE. */
833 wrapup_globals_for_namespace (tree name_space, void* data)
835 struct cp_binding_level *level = NAMESPACE_LEVEL (name_space);
836 VEC(tree,gc) *statics = level->static_decls;
837 tree *vec = VEC_address (tree, statics);
838 int len = VEC_length (tree, statics);
839 int last_time = (data != 0);
843 check_global_declarations (vec, len);
844 emit_debug_global_declarations (vec, len);
848 /* Write out any globals that need to be output. */
849 return wrapup_global_declarations (vec, len);
853 /* In C++, you don't have to write `struct S' to refer to `S'; you
854 can just use `S'. We accomplish this by creating a TYPE_DECL as
855 if the user had written `typedef struct S S'. Create and return
856 the TYPE_DECL for TYPE. */
859 create_implicit_typedef (tree name, tree type)
863 decl = build_decl (input_location, TYPE_DECL, name, type);
864 DECL_ARTIFICIAL (decl) = 1;
865 /* There are other implicit type declarations, like the one *within*
866 a class that allows you to write `S::S'. We must distinguish
868 SET_DECL_IMPLICIT_TYPEDEF_P (decl);
869 TYPE_NAME (type) = decl;
870 TYPE_STUB_DECL (type) = decl;
875 /* Remember a local name for name-mangling purposes. */
878 push_local_name (tree decl)
883 timevar_push (TV_NAME_LOOKUP);
885 name = DECL_NAME (decl);
887 nelts = VEC_length (tree, local_names);
888 for (i = 0; i < nelts; i++)
890 t = VEC_index (tree, local_names, i);
891 if (DECL_NAME (t) == name)
893 if (!DECL_LANG_SPECIFIC (decl))
894 retrofit_lang_decl (decl);
895 DECL_LANG_SPECIFIC (decl)->u.base.u2sel = 1;
896 if (DECL_LANG_SPECIFIC (t))
897 DECL_DISCRIMINATOR (decl) = DECL_DISCRIMINATOR (t) + 1;
899 DECL_DISCRIMINATOR (decl) = 1;
901 VEC_replace (tree, local_names, i, decl);
902 timevar_pop (TV_NAME_LOOKUP);
907 VEC_safe_push (tree, gc, local_names, decl);
908 timevar_pop (TV_NAME_LOOKUP);
911 /* Subroutine of duplicate_decls: return truthvalue of whether
912 or not types of these decls match.
914 For C++, we must compare the parameter list so that `int' can match
915 `int&' in a parameter position, but `int&' is not confused with
919 decls_match (tree newdecl, tree olddecl)
923 if (newdecl == olddecl)
926 if (TREE_CODE (newdecl) != TREE_CODE (olddecl))
927 /* If the two DECLs are not even the same kind of thing, we're not
928 interested in their types. */
931 if (TREE_CODE (newdecl) == FUNCTION_DECL)
933 tree f1 = TREE_TYPE (newdecl);
934 tree f2 = TREE_TYPE (olddecl);
935 tree p1 = TYPE_ARG_TYPES (f1);
936 tree p2 = TYPE_ARG_TYPES (f2);
938 /* Specializations of different templates are different functions
939 even if they have the same type. */
940 tree t1 = (DECL_USE_TEMPLATE (newdecl)
941 ? DECL_TI_TEMPLATE (newdecl)
943 tree t2 = (DECL_USE_TEMPLATE (olddecl)
944 ? DECL_TI_TEMPLATE (olddecl)
949 if (CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl)
950 && ! (DECL_EXTERN_C_P (newdecl)
951 && DECL_EXTERN_C_P (olddecl)))
954 #ifdef NO_IMPLICIT_EXTERN_C
955 /* A new declaration doesn't match a built-in one unless it
956 is also extern "C". */
957 if (DECL_IS_BUILTIN (olddecl)
958 && DECL_EXTERN_C_P (olddecl) && !DECL_EXTERN_C_P (newdecl))
962 if (TREE_CODE (f1) != TREE_CODE (f2))
965 if (same_type_p (TREE_TYPE (f1), TREE_TYPE (f2)))
967 if (p2 == NULL_TREE && DECL_EXTERN_C_P (olddecl)
968 && (DECL_BUILT_IN (olddecl)
969 #ifndef NO_IMPLICIT_EXTERN_C
970 || (DECL_IN_SYSTEM_HEADER (newdecl) && !DECL_CLASS_SCOPE_P (newdecl))
971 || (DECL_IN_SYSTEM_HEADER (olddecl) && !DECL_CLASS_SCOPE_P (olddecl))
975 types_match = self_promoting_args_p (p1);
976 if (p1 == void_list_node)
977 TREE_TYPE (newdecl) = TREE_TYPE (olddecl);
979 #ifndef NO_IMPLICIT_EXTERN_C
980 else if (p1 == NULL_TREE
981 && (DECL_EXTERN_C_P (olddecl)
982 && DECL_IN_SYSTEM_HEADER (olddecl)
983 && !DECL_CLASS_SCOPE_P (olddecl))
984 && (DECL_EXTERN_C_P (newdecl)
985 && DECL_IN_SYSTEM_HEADER (newdecl)
986 && !DECL_CLASS_SCOPE_P (newdecl)))
988 types_match = self_promoting_args_p (p2);
989 TREE_TYPE (newdecl) = TREE_TYPE (olddecl);
993 types_match = compparms (p1, p2);
998 else if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1000 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl))
1001 != TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)))
1004 if (!comp_template_parms (DECL_TEMPLATE_PARMS (newdecl),
1005 DECL_TEMPLATE_PARMS (olddecl)))
1008 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
1009 types_match = same_type_p (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl)),
1010 TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl)));
1012 types_match = decls_match (DECL_TEMPLATE_RESULT (olddecl),
1013 DECL_TEMPLATE_RESULT (newdecl));
1017 /* Need to check scope for variable declaration (VAR_DECL).
1018 For typedef (TYPE_DECL), scope is ignored. */
1019 if (TREE_CODE (newdecl) == VAR_DECL
1020 && CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl)
1022 Two declarations for an object with C language linkage
1023 with the same name (ignoring the namespace that qualify
1024 it) that appear in different namespace scopes refer to
1026 && !(DECL_EXTERN_C_P (olddecl) && DECL_EXTERN_C_P (newdecl)))
1029 if (TREE_TYPE (newdecl) == error_mark_node)
1030 types_match = TREE_TYPE (olddecl) == error_mark_node;
1031 else if (TREE_TYPE (olddecl) == NULL_TREE)
1032 types_match = TREE_TYPE (newdecl) == NULL_TREE;
1033 else if (TREE_TYPE (newdecl) == NULL_TREE)
1036 types_match = comptypes (TREE_TYPE (newdecl),
1037 TREE_TYPE (olddecl),
1038 COMPARE_REDECLARATION);
1044 /* If NEWDECL is `static' and an `extern' was seen previously,
1045 warn about it. OLDDECL is the previous declaration.
1047 Note that this does not apply to the C++ case of declaring
1048 a variable `extern const' and then later `const'.
1050 Don't complain about built-in functions, since they are beyond
1051 the user's control. */
1054 warn_extern_redeclared_static (tree newdecl, tree olddecl)
1056 if (TREE_CODE (newdecl) == TYPE_DECL
1057 || TREE_CODE (newdecl) == TEMPLATE_DECL
1058 || TREE_CODE (newdecl) == CONST_DECL
1059 || TREE_CODE (newdecl) == NAMESPACE_DECL)
1062 /* Don't get confused by static member functions; that's a different
1064 if (TREE_CODE (newdecl) == FUNCTION_DECL
1065 && DECL_STATIC_FUNCTION_P (newdecl))
1068 /* If the old declaration was `static', or the new one isn't, then
1069 then everything is OK. */
1070 if (DECL_THIS_STATIC (olddecl) || !DECL_THIS_STATIC (newdecl))
1073 /* It's OK to declare a builtin function as `static'. */
1074 if (TREE_CODE (olddecl) == FUNCTION_DECL
1075 && DECL_ARTIFICIAL (olddecl))
1078 permerror (input_location, "%qD was declared %<extern%> and later %<static%>", newdecl);
1079 permerror (input_location, "previous declaration of %q+D", olddecl);
1082 /* NEW_DECL is a redeclaration of OLD_DECL; both are functions or
1083 function templates. If their exception specifications do not
1084 match, issue a diagnostic. */
1087 check_redeclaration_exception_specification (tree new_decl,
1092 tree new_exceptions;
1093 tree old_exceptions;
1095 new_type = TREE_TYPE (new_decl);
1096 new_exceptions = TYPE_RAISES_EXCEPTIONS (new_type);
1097 old_type = TREE_TYPE (old_decl);
1098 old_exceptions = TYPE_RAISES_EXCEPTIONS (old_type);
1102 If any declaration of a function has an exception-specification,
1103 all declarations, including the definition and an explicit
1104 specialization, of that function shall have an
1105 exception-specification with the same set of type-ids. */
1106 if ((pedantic || ! DECL_IN_SYSTEM_HEADER (old_decl))
1107 && ! DECL_IS_BUILTIN (old_decl)
1109 && !comp_except_specs (new_exceptions, old_exceptions,
1112 error ("declaration of %qF throws different exceptions", new_decl);
1113 error ("from previous declaration %q+F", old_decl);
1117 #define GNU_INLINE_P(fn) (DECL_DECLARED_INLINE_P (fn) \
1118 && lookup_attribute ("gnu_inline", \
1119 DECL_ATTRIBUTES (fn)))
1121 /* If NEWDECL is a redeclaration of OLDDECL, merge the declarations.
1122 If the redeclaration is invalid, a diagnostic is issued, and the
1123 error_mark_node is returned. Otherwise, OLDDECL is returned.
1125 If NEWDECL is not a redeclaration of OLDDECL, NULL_TREE is
1128 NEWDECL_IS_FRIEND is true if NEWDECL was declared as a friend. */
1131 duplicate_decls (tree newdecl, tree olddecl, bool newdecl_is_friend)
1133 unsigned olddecl_uid = DECL_UID (olddecl);
1134 int olddecl_friend = 0, types_match = 0, hidden_friend = 0;
1135 int new_defines_function = 0;
1136 tree new_template_info;
1138 if (newdecl == olddecl)
1141 types_match = decls_match (newdecl, olddecl);
1143 /* If either the type of the new decl or the type of the old decl is an
1144 error_mark_node, then that implies that we have already issued an
1145 error (earlier) for some bogus type specification, and in that case,
1146 it is rather pointless to harass the user with yet more error message
1147 about the same declaration, so just pretend the types match here. */
1148 if (TREE_TYPE (newdecl) == error_mark_node
1149 || TREE_TYPE (olddecl) == error_mark_node)
1150 return error_mark_node;
1152 if (DECL_P (olddecl)
1153 && TREE_CODE (newdecl) == FUNCTION_DECL
1154 && TREE_CODE (olddecl) == FUNCTION_DECL
1155 && (DECL_UNINLINABLE (newdecl) || DECL_UNINLINABLE (olddecl)))
1157 if (DECL_DECLARED_INLINE_P (newdecl)
1158 && DECL_UNINLINABLE (newdecl)
1159 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl)))
1160 /* Already warned elsewhere. */;
1161 else if (DECL_DECLARED_INLINE_P (olddecl)
1162 && DECL_UNINLINABLE (olddecl)
1163 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl)))
1164 /* Already warned. */;
1165 else if (DECL_DECLARED_INLINE_P (newdecl)
1166 && DECL_UNINLINABLE (olddecl)
1167 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl)))
1169 warning (OPT_Wattributes, "function %q+D redeclared as inline",
1171 warning (OPT_Wattributes, "previous declaration of %q+D "
1172 "with attribute noinline", olddecl);
1174 else if (DECL_DECLARED_INLINE_P (olddecl)
1175 && DECL_UNINLINABLE (newdecl)
1176 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl)))
1178 warning (OPT_Wattributes, "function %q+D redeclared with "
1179 "attribute noinline", newdecl);
1180 warning (OPT_Wattributes, "previous declaration of %q+D was inline",
1185 /* Check for redeclaration and other discrepancies. */
1186 if (TREE_CODE (olddecl) == FUNCTION_DECL
1187 && DECL_ARTIFICIAL (olddecl))
1189 gcc_assert (!DECL_HIDDEN_FRIEND_P (olddecl));
1190 if (TREE_CODE (newdecl) != FUNCTION_DECL)
1192 /* Avoid warnings redeclaring built-ins which have not been
1193 explicitly declared. */
1194 if (DECL_ANTICIPATED (olddecl))
1197 /* If you declare a built-in or predefined function name as static,
1198 the old definition is overridden, but optionally warn this was a
1199 bad choice of name. */
1200 if (! TREE_PUBLIC (newdecl))
1202 warning (OPT_Wshadow,
1203 DECL_BUILT_IN (olddecl)
1204 ? G_("shadowing built-in function %q#D")
1205 : G_("shadowing library function %q#D"), olddecl);
1206 /* Discard the old built-in function. */
1209 /* If the built-in is not ansi, then programs can override
1210 it even globally without an error. */
1211 else if (! DECL_BUILT_IN (olddecl))
1212 warning (0, "library function %q#D redeclared as non-function %q#D",
1216 error ("declaration of %q#D", newdecl);
1217 error ("conflicts with built-in declaration %q#D",
1222 else if (!types_match)
1224 /* Avoid warnings redeclaring built-ins which have not been
1225 explicitly declared. */
1226 if (DECL_ANTICIPATED (olddecl))
1228 /* Deal with fileptr_type_node. FILE type is not known
1229 at the time we create the builtins. */
1232 for (t1 = TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1233 t2 = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1235 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2))
1238 else if (TREE_VALUE (t2) == fileptr_type_node)
1240 tree t = TREE_VALUE (t1);
1242 if (TREE_CODE (t) == POINTER_TYPE
1243 && TYPE_NAME (TREE_TYPE (t))
1244 && DECL_NAME (TYPE_NAME (TREE_TYPE (t)))
1245 == get_identifier ("FILE")
1246 && compparms (TREE_CHAIN (t1), TREE_CHAIN (t2)))
1248 tree oldargs = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1250 TYPE_ARG_TYPES (TREE_TYPE (olddecl))
1251 = TYPE_ARG_TYPES (TREE_TYPE (newdecl));
1252 types_match = decls_match (newdecl, olddecl);
1254 return duplicate_decls (newdecl, olddecl,
1256 TYPE_ARG_TYPES (TREE_TYPE (olddecl)) = oldargs;
1259 else if (! same_type_p (TREE_VALUE (t1), TREE_VALUE (t2)))
1262 else if ((DECL_EXTERN_C_P (newdecl)
1263 && DECL_EXTERN_C_P (olddecl))
1264 || compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1265 TYPE_ARG_TYPES (TREE_TYPE (olddecl))))
1267 /* A near match; override the builtin. */
1269 if (TREE_PUBLIC (newdecl))
1271 warning (0, "new declaration %q#D", newdecl);
1272 warning (0, "ambiguates built-in declaration %q#D",
1276 warning (OPT_Wshadow,
1277 DECL_BUILT_IN (olddecl)
1278 ? G_("shadowing built-in function %q#D")
1279 : G_("shadowing library function %q#D"), olddecl);
1282 /* Discard the old built-in function. */
1285 /* Replace the old RTL to avoid problems with inlining. */
1286 COPY_DECL_RTL (newdecl, olddecl);
1288 /* Even if the types match, prefer the new declarations type for
1289 built-ins which have not been explicitly declared, for
1290 exception lists, etc... */
1291 else if (DECL_ANTICIPATED (olddecl))
1293 tree type = TREE_TYPE (newdecl);
1294 tree attribs = (*targetm.merge_type_attributes)
1295 (TREE_TYPE (olddecl), type);
1297 type = cp_build_type_attribute_variant (type, attribs);
1298 TREE_TYPE (newdecl) = TREE_TYPE (olddecl) = type;
1301 /* If a function is explicitly declared "throw ()", propagate that to
1302 the corresponding builtin. */
1303 if (DECL_BUILT_IN_CLASS (olddecl) == BUILT_IN_NORMAL
1304 && DECL_ANTICIPATED (olddecl)
1305 && TREE_NOTHROW (newdecl)
1306 && !TREE_NOTHROW (olddecl)
1307 && built_in_decls [DECL_FUNCTION_CODE (olddecl)] != NULL_TREE
1308 && built_in_decls [DECL_FUNCTION_CODE (olddecl)] != olddecl
1310 TREE_NOTHROW (built_in_decls [DECL_FUNCTION_CODE (olddecl)]) = 1;
1312 /* Whether or not the builtin can throw exceptions has no
1313 bearing on this declarator. */
1314 TREE_NOTHROW (olddecl) = 0;
1316 if (DECL_THIS_STATIC (newdecl) && !DECL_THIS_STATIC (olddecl))
1318 /* If a builtin function is redeclared as `static', merge
1319 the declarations, but make the original one static. */
1320 DECL_THIS_STATIC (olddecl) = 1;
1321 TREE_PUBLIC (olddecl) = 0;
1323 /* Make the old declaration consistent with the new one so
1324 that all remnants of the builtin-ness of this function
1325 will be banished. */
1326 SET_DECL_LANGUAGE (olddecl, DECL_LANGUAGE (newdecl));
1327 COPY_DECL_RTL (newdecl, olddecl);
1330 else if (TREE_CODE (olddecl) != TREE_CODE (newdecl))
1332 /* C++ Standard, 3.3, clause 4:
1333 "[Note: a namespace name or a class template name must be unique
1334 in its declarative region (7.3.2, clause 14). ]" */
1335 if (TREE_CODE (olddecl) != NAMESPACE_DECL
1336 && TREE_CODE (newdecl) != NAMESPACE_DECL
1337 && (TREE_CODE (olddecl) != TEMPLATE_DECL
1338 || TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) != TYPE_DECL)
1339 && (TREE_CODE (newdecl) != TEMPLATE_DECL
1340 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) != TYPE_DECL))
1342 if ((TREE_CODE (olddecl) == TYPE_DECL && DECL_ARTIFICIAL (olddecl)
1343 && TREE_CODE (newdecl) != TYPE_DECL)
1344 || (TREE_CODE (newdecl) == TYPE_DECL && DECL_ARTIFICIAL (newdecl)
1345 && TREE_CODE (olddecl) != TYPE_DECL))
1347 /* We do nothing special here, because C++ does such nasty
1348 things with TYPE_DECLs. Instead, just let the TYPE_DECL
1349 get shadowed, and know that if we need to find a TYPE_DECL
1350 for a given name, we can look in the IDENTIFIER_TYPE_VALUE
1351 slot of the identifier. */
1355 if ((TREE_CODE (newdecl) == FUNCTION_DECL
1356 && DECL_FUNCTION_TEMPLATE_P (olddecl))
1357 || (TREE_CODE (olddecl) == FUNCTION_DECL
1358 && DECL_FUNCTION_TEMPLATE_P (newdecl)))
1362 error ("%q#D redeclared as different kind of symbol", newdecl);
1363 if (TREE_CODE (olddecl) == TREE_LIST)
1364 olddecl = TREE_VALUE (olddecl);
1365 error ("previous declaration of %q+#D", olddecl);
1367 return error_mark_node;
1369 else if (!types_match)
1371 if (CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl))
1372 /* These are certainly not duplicate declarations; they're
1373 from different scopes. */
1376 if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1378 /* The name of a class template may not be declared to refer to
1379 any other template, class, function, object, namespace, value,
1380 or type in the same scope. */
1381 if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) == TYPE_DECL
1382 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
1384 error ("declaration of template %q#D", newdecl);
1385 error ("conflicts with previous declaration %q+#D", olddecl);
1387 else if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) == FUNCTION_DECL
1388 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == FUNCTION_DECL
1389 && compparms (TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl))),
1390 TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl))))
1391 && comp_template_parms (DECL_TEMPLATE_PARMS (newdecl),
1392 DECL_TEMPLATE_PARMS (olddecl))
1393 /* Template functions can be disambiguated by
1395 && same_type_p (TREE_TYPE (TREE_TYPE (newdecl)),
1396 TREE_TYPE (TREE_TYPE (olddecl))))
1398 error ("new declaration %q#D", newdecl);
1399 error ("ambiguates old declaration %q+#D", olddecl);
1403 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1405 if (DECL_EXTERN_C_P (newdecl) && DECL_EXTERN_C_P (olddecl))
1407 error ("declaration of C function %q#D conflicts with",
1409 error ("previous declaration %q+#D here", olddecl);
1411 else if (compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1412 TYPE_ARG_TYPES (TREE_TYPE (olddecl))))
1414 error ("new declaration %q#D", newdecl);
1415 error ("ambiguates old declaration %q+#D", olddecl);
1416 return error_mark_node;
1423 error ("conflicting declaration %q#D", newdecl);
1424 error ("%q+D has a previous declaration as %q#D", olddecl, olddecl);
1425 return error_mark_node;
1428 else if (TREE_CODE (newdecl) == FUNCTION_DECL
1429 && ((DECL_TEMPLATE_SPECIALIZATION (olddecl)
1430 && (!DECL_TEMPLATE_INFO (newdecl)
1431 || (DECL_TI_TEMPLATE (newdecl)
1432 != DECL_TI_TEMPLATE (olddecl))))
1433 || (DECL_TEMPLATE_SPECIALIZATION (newdecl)
1434 && (!DECL_TEMPLATE_INFO (olddecl)
1435 || (DECL_TI_TEMPLATE (olddecl)
1436 != DECL_TI_TEMPLATE (newdecl))))))
1437 /* It's OK to have a template specialization and a non-template
1438 with the same type, or to have specializations of two
1439 different templates with the same type. Note that if one is a
1440 specialization, and the other is an instantiation of the same
1441 template, that we do not exit at this point. That situation
1442 can occur if we instantiate a template class, and then
1443 specialize one of its methods. This situation is valid, but
1444 the declarations must be merged in the usual way. */
1446 else if (TREE_CODE (newdecl) == FUNCTION_DECL
1447 && ((DECL_TEMPLATE_INSTANTIATION (olddecl)
1448 && !DECL_USE_TEMPLATE (newdecl))
1449 || (DECL_TEMPLATE_INSTANTIATION (newdecl)
1450 && !DECL_USE_TEMPLATE (olddecl))))
1451 /* One of the declarations is a template instantiation, and the
1452 other is not a template at all. That's OK. */
1454 else if (TREE_CODE (newdecl) == NAMESPACE_DECL)
1456 /* In [namespace.alias] we have:
1458 In a declarative region, a namespace-alias-definition can be
1459 used to redefine a namespace-alias declared in that declarative
1460 region to refer only to the namespace to which it already
1463 Therefore, if we encounter a second alias directive for the same
1464 alias, we can just ignore the second directive. */
1465 if (DECL_NAMESPACE_ALIAS (newdecl)
1466 && (DECL_NAMESPACE_ALIAS (newdecl)
1467 == DECL_NAMESPACE_ALIAS (olddecl)))
1469 /* [namespace.alias]
1471 A namespace-name or namespace-alias shall not be declared as
1472 the name of any other entity in the same declarative region.
1473 A namespace-name defined at global scope shall not be
1474 declared as the name of any other entity in any global scope
1476 error ("declaration of namespace %qD conflicts with", newdecl);
1477 error ("previous declaration of namespace %q+D here", olddecl);
1478 return error_mark_node;
1482 const char *errmsg = redeclaration_error_message (newdecl, olddecl);
1485 error_at (DECL_SOURCE_LOCATION (newdecl), errmsg, newdecl);
1486 if (DECL_NAME (olddecl) != NULL_TREE)
1487 error ((DECL_INITIAL (olddecl) && namespace_bindings_p ())
1488 ? "%q+#D previously defined here"
1489 : "%q+#D previously declared here", olddecl);
1490 return error_mark_node;
1492 else if (TREE_CODE (olddecl) == FUNCTION_DECL
1493 && DECL_INITIAL (olddecl) != NULL_TREE
1494 && TYPE_ARG_TYPES (TREE_TYPE (olddecl)) == NULL_TREE
1495 && TYPE_ARG_TYPES (TREE_TYPE (newdecl)) != NULL_TREE)
1497 /* Prototype decl follows defn w/o prototype. */
1498 warning_at (input_location, 0, "prototype for %q+#D", newdecl);
1499 warning_at (DECL_SOURCE_LOCATION (olddecl), 0,
1500 "follows non-prototype definition here");
1502 else if ((TREE_CODE (olddecl) == FUNCTION_DECL
1503 || TREE_CODE (olddecl) == VAR_DECL)
1504 && DECL_LANGUAGE (newdecl) != DECL_LANGUAGE (olddecl))
1507 If two declarations of the same function or object
1508 specify different linkage-specifications ..., the program
1509 is ill-formed.... Except for functions with C++ linkage,
1510 a function declaration without a linkage specification
1511 shall not precede the first linkage specification for
1512 that function. A function can be declared without a
1513 linkage specification after an explicit linkage
1514 specification has been seen; the linkage explicitly
1515 specified in the earlier declaration is not affected by
1516 such a function declaration.
1518 DR 563 raises the question why the restrictions on
1519 functions should not also apply to objects. Older
1520 versions of G++ silently ignore the linkage-specification
1528 which is clearly wrong. Therefore, we now treat objects
1530 if (current_lang_depth () == 0)
1532 /* There is no explicit linkage-specification, so we use
1533 the linkage from the previous declaration. */
1534 if (!DECL_LANG_SPECIFIC (newdecl))
1535 retrofit_lang_decl (newdecl);
1536 SET_DECL_LANGUAGE (newdecl, DECL_LANGUAGE (olddecl));
1540 error ("previous declaration of %q+#D with %qL linkage",
1541 olddecl, DECL_LANGUAGE (olddecl));
1542 error ("conflicts with new declaration with %qL linkage",
1543 DECL_LANGUAGE (newdecl));
1547 if (DECL_LANG_SPECIFIC (olddecl) && DECL_USE_TEMPLATE (olddecl))
1549 else if (TREE_CODE (olddecl) == FUNCTION_DECL)
1551 tree t1 = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1552 tree t2 = TYPE_ARG_TYPES (TREE_TYPE (newdecl));
1555 if (TREE_CODE (TREE_TYPE (newdecl)) == METHOD_TYPE)
1556 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2);
1558 for (; t1 && t1 != void_list_node;
1559 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2), i++)
1560 if (TREE_PURPOSE (t1) && TREE_PURPOSE (t2))
1562 if (1 == simple_cst_equal (TREE_PURPOSE (t1),
1565 permerror (input_location, "default argument given for parameter %d of %q#D",
1567 permerror (input_location, "after previous specification in %q+#D", olddecl);
1571 error ("default argument given for parameter %d of %q#D",
1573 error ("after previous specification in %q+#D",
1580 /* Do not merge an implicit typedef with an explicit one. In:
1584 typedef class A A __attribute__ ((foo));
1586 the attribute should apply only to the typedef. */
1587 if (TREE_CODE (olddecl) == TYPE_DECL
1588 && (DECL_IMPLICIT_TYPEDEF_P (olddecl)
1589 || DECL_IMPLICIT_TYPEDEF_P (newdecl)))
1592 /* If new decl is `static' and an `extern' was seen previously,
1594 warn_extern_redeclared_static (newdecl, olddecl);
1596 /* We have committed to returning 1 at this point. */
1597 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1599 /* Now that functions must hold information normally held
1600 by field decls, there is extra work to do so that
1601 declaration information does not get destroyed during
1603 if (DECL_VINDEX (olddecl))
1604 DECL_VINDEX (newdecl) = DECL_VINDEX (olddecl);
1605 if (DECL_CONTEXT (olddecl))
1606 DECL_CONTEXT (newdecl) = DECL_CONTEXT (olddecl);
1607 DECL_STATIC_CONSTRUCTOR (newdecl) |= DECL_STATIC_CONSTRUCTOR (olddecl);
1608 DECL_STATIC_DESTRUCTOR (newdecl) |= DECL_STATIC_DESTRUCTOR (olddecl);
1609 DECL_PURE_VIRTUAL_P (newdecl) |= DECL_PURE_VIRTUAL_P (olddecl);
1610 DECL_VIRTUAL_P (newdecl) |= DECL_VIRTUAL_P (olddecl);
1611 DECL_INVALID_OVERRIDER_P (newdecl) |= DECL_INVALID_OVERRIDER_P (olddecl);
1612 DECL_THIS_STATIC (newdecl) |= DECL_THIS_STATIC (olddecl);
1613 if (DECL_OVERLOADED_OPERATOR_P (olddecl) != ERROR_MARK)
1614 SET_OVERLOADED_OPERATOR_CODE
1615 (newdecl, DECL_OVERLOADED_OPERATOR_P (olddecl));
1616 new_defines_function = DECL_INITIAL (newdecl) != NULL_TREE;
1618 /* Optionally warn about more than one declaration for the same
1619 name, but don't warn about a function declaration followed by a
1621 if (warn_redundant_decls && ! DECL_ARTIFICIAL (olddecl)
1622 && !(new_defines_function && DECL_INITIAL (olddecl) == NULL_TREE)
1623 /* Don't warn about extern decl followed by definition. */
1624 && !(DECL_EXTERNAL (olddecl) && ! DECL_EXTERNAL (newdecl))
1625 /* Don't warn about friends, let add_friend take care of it. */
1626 && ! (newdecl_is_friend || DECL_FRIEND_P (olddecl)))
1628 warning (OPT_Wredundant_decls, "redundant redeclaration of %qD in same scope", newdecl);
1629 warning (OPT_Wredundant_decls, "previous declaration of %q+D", olddecl);
1632 if (DECL_DELETED_FN (newdecl))
1634 error ("deleted definition of %qD", newdecl);
1635 error ("after previous declaration %q+D", olddecl);
1639 /* Deal with C++: must preserve virtual function table size. */
1640 if (TREE_CODE (olddecl) == TYPE_DECL)
1642 tree newtype = TREE_TYPE (newdecl);
1643 tree oldtype = TREE_TYPE (olddecl);
1645 if (newtype != error_mark_node && oldtype != error_mark_node
1646 && TYPE_LANG_SPECIFIC (newtype) && TYPE_LANG_SPECIFIC (oldtype))
1647 CLASSTYPE_FRIEND_CLASSES (newtype)
1648 = CLASSTYPE_FRIEND_CLASSES (oldtype);
1650 DECL_ORIGINAL_TYPE (newdecl) = DECL_ORIGINAL_TYPE (olddecl);
1653 /* Copy all the DECL_... slots specified in the new decl
1654 except for any that we copy here from the old type. */
1655 DECL_ATTRIBUTES (newdecl)
1656 = (*targetm.merge_decl_attributes) (olddecl, newdecl);
1658 if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1662 old_result = DECL_TEMPLATE_RESULT (olddecl);
1663 new_result = DECL_TEMPLATE_RESULT (newdecl);
1664 TREE_TYPE (olddecl) = TREE_TYPE (old_result);
1665 DECL_TEMPLATE_SPECIALIZATIONS (olddecl)
1666 = chainon (DECL_TEMPLATE_SPECIALIZATIONS (olddecl),
1667 DECL_TEMPLATE_SPECIALIZATIONS (newdecl));
1669 DECL_ATTRIBUTES (old_result)
1670 = (*targetm.merge_decl_attributes) (old_result, new_result);
1672 if (DECL_FUNCTION_TEMPLATE_P (newdecl))
1674 if (GNU_INLINE_P (old_result) != GNU_INLINE_P (new_result)
1675 && DECL_INITIAL (new_result))
1677 if (DECL_INITIAL (old_result))
1678 DECL_UNINLINABLE (old_result) = 1;
1680 DECL_UNINLINABLE (old_result) = DECL_UNINLINABLE (new_result);
1681 DECL_EXTERNAL (old_result) = DECL_EXTERNAL (new_result);
1682 DECL_NOT_REALLY_EXTERN (old_result)
1683 = DECL_NOT_REALLY_EXTERN (new_result);
1684 DECL_INTERFACE_KNOWN (old_result)
1685 = DECL_INTERFACE_KNOWN (new_result);
1686 DECL_DECLARED_INLINE_P (old_result)
1687 = DECL_DECLARED_INLINE_P (new_result);
1688 DECL_DISREGARD_INLINE_LIMITS (old_result)
1689 |= DECL_DISREGARD_INLINE_LIMITS (new_result);
1694 DECL_DECLARED_INLINE_P (old_result)
1695 |= DECL_DECLARED_INLINE_P (new_result);
1696 DECL_DISREGARD_INLINE_LIMITS (old_result)
1697 |= DECL_DISREGARD_INLINE_LIMITS (new_result);
1698 check_redeclaration_exception_specification (newdecl, olddecl);
1702 /* If the new declaration is a definition, update the file and
1703 line information on the declaration, and also make
1704 the old declaration the same definition. */
1705 if (DECL_INITIAL (new_result) != NULL_TREE)
1707 DECL_SOURCE_LOCATION (olddecl)
1708 = DECL_SOURCE_LOCATION (old_result)
1709 = DECL_SOURCE_LOCATION (newdecl);
1710 DECL_INITIAL (old_result) = DECL_INITIAL (new_result);
1711 if (DECL_FUNCTION_TEMPLATE_P (newdecl))
1714 DECL_ARGUMENTS (old_result)
1715 = DECL_ARGUMENTS (new_result);
1716 for (parm = DECL_ARGUMENTS (old_result); parm;
1717 parm = TREE_CHAIN (parm))
1718 DECL_CONTEXT (parm) = old_result;
1727 /* Automatically handles default parameters. */
1728 tree oldtype = TREE_TYPE (olddecl);
1731 /* Merge the data types specified in the two decls. */
1732 newtype = merge_types (TREE_TYPE (newdecl), TREE_TYPE (olddecl));
1734 /* If merge_types produces a non-typedef type, just use the old type. */
1735 if (TREE_CODE (newdecl) == TYPE_DECL
1736 && newtype == DECL_ORIGINAL_TYPE (newdecl))
1739 if (TREE_CODE (newdecl) == VAR_DECL)
1741 DECL_THIS_EXTERN (newdecl) |= DECL_THIS_EXTERN (olddecl);
1742 DECL_INITIALIZED_P (newdecl) |= DECL_INITIALIZED_P (olddecl);
1743 DECL_NONTRIVIALLY_INITIALIZED_P (newdecl)
1744 |= DECL_NONTRIVIALLY_INITIALIZED_P (olddecl);
1745 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (newdecl)
1746 |= DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (olddecl);
1748 /* Merge the threadprivate attribute from OLDDECL into NEWDECL. */
1749 if (DECL_LANG_SPECIFIC (olddecl)
1750 && CP_DECL_THREADPRIVATE_P (olddecl))
1752 /* Allocate a LANG_SPECIFIC structure for NEWDECL, if needed. */
1753 if (!DECL_LANG_SPECIFIC (newdecl))
1754 retrofit_lang_decl (newdecl);
1756 DECL_TLS_MODEL (newdecl) = DECL_TLS_MODEL (olddecl);
1757 CP_DECL_THREADPRIVATE_P (newdecl) = 1;
1761 /* Do this after calling `merge_types' so that default
1762 parameters don't confuse us. */
1763 else if (TREE_CODE (newdecl) == FUNCTION_DECL)
1764 check_redeclaration_exception_specification (newdecl, olddecl);
1765 TREE_TYPE (newdecl) = TREE_TYPE (olddecl) = newtype;
1767 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1768 check_default_args (newdecl);
1770 /* Lay the type out, unless already done. */
1771 if (! same_type_p (newtype, oldtype)
1772 && TREE_TYPE (newdecl) != error_mark_node
1773 && !(processing_template_decl && uses_template_parms (newdecl)))
1774 layout_type (TREE_TYPE (newdecl));
1776 if ((TREE_CODE (newdecl) == VAR_DECL
1777 || TREE_CODE (newdecl) == PARM_DECL
1778 || TREE_CODE (newdecl) == RESULT_DECL
1779 || TREE_CODE (newdecl) == FIELD_DECL
1780 || TREE_CODE (newdecl) == TYPE_DECL)
1781 && !(processing_template_decl && uses_template_parms (newdecl)))
1782 layout_decl (newdecl, 0);
1784 /* Merge the type qualifiers. */
1785 if (TREE_READONLY (newdecl))
1786 TREE_READONLY (olddecl) = 1;
1787 if (TREE_THIS_VOLATILE (newdecl))
1788 TREE_THIS_VOLATILE (olddecl) = 1;
1789 if (TREE_NOTHROW (newdecl))
1790 TREE_NOTHROW (olddecl) = 1;
1792 /* Merge deprecatedness. */
1793 if (TREE_DEPRECATED (newdecl))
1794 TREE_DEPRECATED (olddecl) = 1;
1796 /* Preserve function specific target and optimization options */
1797 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1799 if (DECL_FUNCTION_SPECIFIC_TARGET (olddecl)
1800 && !DECL_FUNCTION_SPECIFIC_TARGET (newdecl))
1801 DECL_FUNCTION_SPECIFIC_TARGET (newdecl)
1802 = DECL_FUNCTION_SPECIFIC_TARGET (olddecl);
1804 if (DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl)
1805 && !DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl))
1806 DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl)
1807 = DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl);
1810 /* Merge the initialization information. */
1811 if (DECL_INITIAL (newdecl) == NULL_TREE
1812 && DECL_INITIAL (olddecl) != NULL_TREE)
1814 DECL_INITIAL (newdecl) = DECL_INITIAL (olddecl);
1815 DECL_SOURCE_LOCATION (newdecl) = DECL_SOURCE_LOCATION (olddecl);
1816 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1818 DECL_SAVED_TREE (newdecl) = DECL_SAVED_TREE (olddecl);
1819 DECL_STRUCT_FUNCTION (newdecl) = DECL_STRUCT_FUNCTION (olddecl);
1823 /* Merge the section attribute.
1824 We want to issue an error if the sections conflict but that must be
1825 done later in decl_attributes since we are called before attributes
1827 if (DECL_SECTION_NAME (newdecl) == NULL_TREE)
1828 DECL_SECTION_NAME (newdecl) = DECL_SECTION_NAME (olddecl);
1830 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1832 DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (newdecl)
1833 |= DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (olddecl);
1834 DECL_NO_LIMIT_STACK (newdecl) |= DECL_NO_LIMIT_STACK (olddecl);
1835 TREE_THIS_VOLATILE (newdecl) |= TREE_THIS_VOLATILE (olddecl);
1836 TREE_NOTHROW (newdecl) |= TREE_NOTHROW (olddecl);
1837 DECL_IS_MALLOC (newdecl) |= DECL_IS_MALLOC (olddecl);
1838 DECL_IS_OPERATOR_NEW (newdecl) |= DECL_IS_OPERATOR_NEW (olddecl);
1839 DECL_PURE_P (newdecl) |= DECL_PURE_P (olddecl);
1840 TREE_READONLY (newdecl) |= TREE_READONLY (olddecl);
1841 DECL_LOOPING_CONST_OR_PURE_P (newdecl)
1842 |= DECL_LOOPING_CONST_OR_PURE_P (olddecl);
1843 /* Keep the old RTL. */
1844 COPY_DECL_RTL (olddecl, newdecl);
1846 else if (TREE_CODE (newdecl) == VAR_DECL
1847 && (DECL_SIZE (olddecl) || !DECL_SIZE (newdecl)))
1849 /* Keep the old RTL. We cannot keep the old RTL if the old
1850 declaration was for an incomplete object and the new
1851 declaration is not since many attributes of the RTL will
1853 COPY_DECL_RTL (olddecl, newdecl);
1856 /* If cannot merge, then use the new type and qualifiers,
1857 and don't preserve the old rtl. */
1860 /* Clean out any memory we had of the old declaration. */
1861 tree oldstatic = value_member (olddecl, static_aggregates);
1863 TREE_VALUE (oldstatic) = error_mark_node;
1865 TREE_TYPE (olddecl) = TREE_TYPE (newdecl);
1866 TREE_READONLY (olddecl) = TREE_READONLY (newdecl);
1867 TREE_THIS_VOLATILE (olddecl) = TREE_THIS_VOLATILE (newdecl);
1868 TREE_SIDE_EFFECTS (olddecl) = TREE_SIDE_EFFECTS (newdecl);
1871 /* Merge the storage class information. */
1872 merge_weak (newdecl, olddecl);
1874 if (DECL_ONE_ONLY (olddecl))
1875 DECL_COMDAT_GROUP (newdecl) = DECL_COMDAT_GROUP (olddecl);
1877 DECL_DEFER_OUTPUT (newdecl) |= DECL_DEFER_OUTPUT (olddecl);
1878 TREE_PUBLIC (newdecl) = TREE_PUBLIC (olddecl);
1879 TREE_STATIC (olddecl) = TREE_STATIC (newdecl) |= TREE_STATIC (olddecl);
1880 if (! DECL_EXTERNAL (olddecl))
1881 DECL_EXTERNAL (newdecl) = 0;
1883 new_template_info = NULL_TREE;
1884 if (DECL_LANG_SPECIFIC (newdecl) && DECL_LANG_SPECIFIC (olddecl))
1886 bool new_redefines_gnu_inline = false;
1888 if (new_defines_function
1889 && ((DECL_INTERFACE_KNOWN (olddecl)
1890 && TREE_CODE (olddecl) == FUNCTION_DECL)
1891 || (TREE_CODE (olddecl) == TEMPLATE_DECL
1892 && (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl))
1893 == FUNCTION_DECL))))
1897 if (TREE_CODE (fn) == TEMPLATE_DECL)
1898 fn = DECL_TEMPLATE_RESULT (olddecl);
1900 new_redefines_gnu_inline = GNU_INLINE_P (fn) && DECL_INITIAL (fn);
1903 if (!new_redefines_gnu_inline)
1905 DECL_INTERFACE_KNOWN (newdecl) |= DECL_INTERFACE_KNOWN (olddecl);
1906 DECL_NOT_REALLY_EXTERN (newdecl) |= DECL_NOT_REALLY_EXTERN (olddecl);
1907 DECL_COMDAT (newdecl) |= DECL_COMDAT (olddecl);
1909 DECL_TEMPLATE_INSTANTIATED (newdecl)
1910 |= DECL_TEMPLATE_INSTANTIATED (olddecl);
1911 DECL_ODR_USED (newdecl) |= DECL_ODR_USED (olddecl);
1913 /* If the OLDDECL is an instantiation and/or specialization,
1914 then the NEWDECL must be too. But, it may not yet be marked
1915 as such if the caller has created NEWDECL, but has not yet
1916 figured out that it is a redeclaration. */
1917 if (!DECL_USE_TEMPLATE (newdecl))
1918 DECL_USE_TEMPLATE (newdecl) = DECL_USE_TEMPLATE (olddecl);
1920 /* Don't really know how much of the language-specific
1921 values we should copy from old to new. */
1922 DECL_IN_AGGR_P (newdecl) = DECL_IN_AGGR_P (olddecl);
1923 DECL_REPO_AVAILABLE_P (newdecl) = DECL_REPO_AVAILABLE_P (olddecl);
1924 DECL_INITIALIZED_IN_CLASS_P (newdecl)
1925 |= DECL_INITIALIZED_IN_CLASS_P (olddecl);
1927 if (LANG_DECL_HAS_MIN (newdecl))
1929 DECL_LANG_SPECIFIC (newdecl)->u.min.u2 =
1930 DECL_LANG_SPECIFIC (olddecl)->u.min.u2;
1931 if (DECL_TEMPLATE_INFO (newdecl))
1932 new_template_info = DECL_TEMPLATE_INFO (newdecl);
1933 DECL_TEMPLATE_INFO (newdecl) = DECL_TEMPLATE_INFO (olddecl);
1935 /* Only functions have these fields. */
1936 if (TREE_CODE (newdecl) == FUNCTION_DECL
1937 || DECL_FUNCTION_TEMPLATE_P (newdecl))
1939 DECL_NONCONVERTING_P (newdecl) = DECL_NONCONVERTING_P (olddecl);
1940 olddecl_friend = DECL_FRIEND_P (olddecl);
1941 hidden_friend = (DECL_ANTICIPATED (olddecl)
1942 && DECL_HIDDEN_FRIEND_P (olddecl)
1943 && newdecl_is_friend);
1944 DECL_BEFRIENDING_CLASSES (newdecl)
1945 = chainon (DECL_BEFRIENDING_CLASSES (newdecl),
1946 DECL_BEFRIENDING_CLASSES (olddecl));
1947 /* DECL_THUNKS is only valid for virtual functions,
1948 otherwise it is a DECL_FRIEND_CONTEXT. */
1949 if (DECL_VIRTUAL_P (newdecl))
1950 DECL_THUNKS (newdecl) = DECL_THUNKS (olddecl);
1952 /* Only variables have this field. */
1953 else if (TREE_CODE (newdecl) == VAR_DECL
1954 && VAR_HAD_UNKNOWN_BOUND (olddecl))
1955 SET_VAR_HAD_UNKNOWN_BOUND (newdecl);
1958 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1962 /* Merge parameter attributes. */
1963 tree oldarg, newarg;
1964 for (oldarg = DECL_ARGUMENTS(olddecl),
1965 newarg = DECL_ARGUMENTS(newdecl);
1967 oldarg = TREE_CHAIN(oldarg), newarg = TREE_CHAIN(newarg)) {
1968 DECL_ATTRIBUTES (newarg)
1969 = (*targetm.merge_decl_attributes) (oldarg, newarg);
1970 DECL_ATTRIBUTES (oldarg) = DECL_ATTRIBUTES (newarg);
1973 if (DECL_TEMPLATE_INSTANTIATION (olddecl)
1974 && !DECL_TEMPLATE_INSTANTIATION (newdecl))
1976 /* If newdecl is not a specialization, then it is not a
1977 template-related function at all. And that means that we
1978 should have exited above, returning 0. */
1979 gcc_assert (DECL_TEMPLATE_SPECIALIZATION (newdecl));
1981 if (DECL_ODR_USED (olddecl))
1982 /* From [temp.expl.spec]:
1984 If a template, a member template or the member of a class
1985 template is explicitly specialized then that
1986 specialization shall be declared before the first use of
1987 that specialization that would cause an implicit
1988 instantiation to take place, in every translation unit in
1989 which such a use occurs. */
1990 error ("explicit specialization of %qD after first use",
1993 SET_DECL_TEMPLATE_SPECIALIZATION (olddecl);
1995 /* Don't propagate visibility from the template to the
1996 specialization here. We'll do that in determine_visibility if
1998 DECL_VISIBILITY_SPECIFIED (olddecl) = 0;
2000 /* [temp.expl.spec/14] We don't inline explicit specialization
2001 just because the primary template says so. */
2003 else if (new_defines_function && DECL_INITIAL (olddecl))
2005 /* Never inline re-defined extern inline functions.
2006 FIXME: this could be better handled by keeping both
2007 function as separate declarations. */
2008 DECL_UNINLINABLE (newdecl) = 1;
2012 if (DECL_PENDING_INLINE_INFO (newdecl) == 0)
2013 DECL_PENDING_INLINE_INFO (newdecl) = DECL_PENDING_INLINE_INFO (olddecl);
2015 DECL_DECLARED_INLINE_P (newdecl) |= DECL_DECLARED_INLINE_P (olddecl);
2017 DECL_UNINLINABLE (newdecl) = DECL_UNINLINABLE (olddecl)
2018 = (DECL_UNINLINABLE (newdecl) || DECL_UNINLINABLE (olddecl));
2020 DECL_DISREGARD_INLINE_LIMITS (newdecl)
2021 = DECL_DISREGARD_INLINE_LIMITS (olddecl)
2022 = (DECL_DISREGARD_INLINE_LIMITS (newdecl)
2023 || DECL_DISREGARD_INLINE_LIMITS (olddecl));
2026 /* Preserve abstractness on cloned [cd]tors. */
2027 DECL_ABSTRACT (newdecl) = DECL_ABSTRACT (olddecl);
2029 /* Update newdecl's parms to point at olddecl. */
2030 for (parm = DECL_ARGUMENTS (newdecl); parm;
2031 parm = TREE_CHAIN (parm))
2032 DECL_CONTEXT (parm) = olddecl;
2036 SET_DECL_LANGUAGE (olddecl, DECL_LANGUAGE (newdecl));
2037 COPY_DECL_ASSEMBLER_NAME (newdecl, olddecl);
2038 COPY_DECL_RTL (newdecl, olddecl);
2040 if (! types_match || new_defines_function)
2042 /* These need to be copied so that the names are available.
2043 Note that if the types do match, we'll preserve inline
2044 info and other bits, but if not, we won't. */
2045 DECL_ARGUMENTS (olddecl) = DECL_ARGUMENTS (newdecl);
2046 DECL_RESULT (olddecl) = DECL_RESULT (newdecl);
2048 if (new_defines_function)
2049 /* If defining a function declared with other language
2050 linkage, use the previously declared language linkage. */
2051 SET_DECL_LANGUAGE (newdecl, DECL_LANGUAGE (olddecl));
2052 else if (types_match)
2054 /* If redeclaring a builtin function, and not a definition,
2055 it stays built in. */
2056 if (DECL_BUILT_IN (olddecl))
2058 DECL_BUILT_IN_CLASS (newdecl) = DECL_BUILT_IN_CLASS (olddecl);
2059 DECL_FUNCTION_CODE (newdecl) = DECL_FUNCTION_CODE (olddecl);
2060 /* If we're keeping the built-in definition, keep the rtl,
2061 regardless of declaration matches. */
2062 COPY_DECL_RTL (olddecl, newdecl);
2065 DECL_RESULT (newdecl) = DECL_RESULT (olddecl);
2066 /* Don't clear out the arguments if we're just redeclaring a
2068 if (DECL_ARGUMENTS (olddecl))
2069 DECL_ARGUMENTS (newdecl) = DECL_ARGUMENTS (olddecl);
2072 else if (TREE_CODE (newdecl) == NAMESPACE_DECL)
2073 NAMESPACE_LEVEL (newdecl) = NAMESPACE_LEVEL (olddecl);
2075 /* Now preserve various other info from the definition. */
2076 TREE_ADDRESSABLE (newdecl) = TREE_ADDRESSABLE (olddecl);
2077 TREE_ASM_WRITTEN (newdecl) = TREE_ASM_WRITTEN (olddecl);
2078 DECL_COMMON (newdecl) = DECL_COMMON (olddecl);
2079 COPY_DECL_ASSEMBLER_NAME (olddecl, newdecl);
2081 /* Warn about conflicting visibility specifications. */
2082 if (DECL_VISIBILITY_SPECIFIED (olddecl)
2083 && DECL_VISIBILITY_SPECIFIED (newdecl)
2084 && DECL_VISIBILITY (newdecl) != DECL_VISIBILITY (olddecl))
2086 warning_at (input_location, OPT_Wattributes,
2087 "%q+D: visibility attribute ignored because it", newdecl);
2088 warning_at (DECL_SOURCE_LOCATION (olddecl), OPT_Wattributes,
2089 "conflicts with previous declaration here");
2091 /* Choose the declaration which specified visibility. */
2092 if (DECL_VISIBILITY_SPECIFIED (olddecl))
2094 DECL_VISIBILITY (newdecl) = DECL_VISIBILITY (olddecl);
2095 DECL_VISIBILITY_SPECIFIED (newdecl) = 1;
2097 /* Init priority used to be merged from newdecl to olddecl by the memcpy,
2098 so keep this behavior. */
2099 if (TREE_CODE (newdecl) == VAR_DECL && DECL_HAS_INIT_PRIORITY_P (newdecl))
2101 SET_DECL_INIT_PRIORITY (olddecl, DECL_INIT_PRIORITY (newdecl));
2102 DECL_HAS_INIT_PRIORITY_P (olddecl) = 1;
2105 /* The DECL_LANG_SPECIFIC information in OLDDECL will be replaced
2106 with that from NEWDECL below. */
2107 if (DECL_LANG_SPECIFIC (olddecl))
2109 gcc_assert (DECL_LANG_SPECIFIC (olddecl)
2110 != DECL_LANG_SPECIFIC (newdecl));
2111 ggc_free (DECL_LANG_SPECIFIC (olddecl));
2114 /* Merge the USED information. */
2115 if (TREE_USED (olddecl))
2116 TREE_USED (newdecl) = 1;
2117 else if (TREE_USED (newdecl))
2118 TREE_USED (olddecl) = 1;
2119 if (TREE_CODE (newdecl) == VAR_DECL)
2121 if (DECL_READ_P (olddecl))
2122 DECL_READ_P (newdecl) = 1;
2123 else if (DECL_READ_P (newdecl))
2124 DECL_READ_P (olddecl) = 1;
2126 if (DECL_PRESERVE_P (olddecl))
2127 DECL_PRESERVE_P (newdecl) = 1;
2128 else if (DECL_PRESERVE_P (newdecl))
2129 DECL_PRESERVE_P (olddecl) = 1;
2131 if (TREE_CODE (newdecl) == FUNCTION_DECL)
2135 function_size = sizeof (struct tree_decl_common);
2137 memcpy ((char *) olddecl + sizeof (struct tree_common),
2138 (char *) newdecl + sizeof (struct tree_common),
2139 function_size - sizeof (struct tree_common));
2141 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
2142 (char *) newdecl + sizeof (struct tree_decl_common),
2143 sizeof (struct tree_function_decl) - sizeof (struct tree_decl_common));
2144 if (new_template_info)
2145 /* If newdecl is a template instantiation, it is possible that
2146 the following sequence of events has occurred:
2148 o A friend function was declared in a class template. The
2149 class template was instantiated.
2151 o The instantiation of the friend declaration was
2152 recorded on the instantiation list, and is newdecl.
2154 o Later, however, instantiate_class_template called pushdecl
2155 on the newdecl to perform name injection. But, pushdecl in
2156 turn called duplicate_decls when it discovered that another
2157 declaration of a global function with the same name already
2160 o Here, in duplicate_decls, we decided to clobber newdecl.
2162 If we're going to do that, we'd better make sure that
2163 olddecl, and not newdecl, is on the list of
2164 instantiations so that if we try to do the instantiation
2165 again we won't get the clobbered declaration. */
2166 reregister_specialization (newdecl,
2172 size_t size = tree_code_size (TREE_CODE (olddecl));
2173 memcpy ((char *) olddecl + sizeof (struct tree_common),
2174 (char *) newdecl + sizeof (struct tree_common),
2175 sizeof (struct tree_decl_common) - sizeof (struct tree_common));
2176 switch (TREE_CODE (olddecl))
2186 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
2187 (char *) newdecl + sizeof (struct tree_decl_common),
2188 size - sizeof (struct tree_decl_common)
2189 + TREE_CODE_LENGTH (TREE_CODE (newdecl)) * sizeof (char *));
2193 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
2194 (char *) newdecl + sizeof (struct tree_decl_common),
2195 sizeof (struct tree_decl_non_common) - sizeof (struct tree_decl_common)
2196 + TREE_CODE_LENGTH (TREE_CODE (newdecl)) * sizeof (char *));
2200 DECL_UID (olddecl) = olddecl_uid;
2202 DECL_FRIEND_P (olddecl) = 1;
2205 DECL_ANTICIPATED (olddecl) = 1;
2206 DECL_HIDDEN_FRIEND_P (olddecl) = 1;
2209 /* NEWDECL contains the merged attribute lists.
2210 Update OLDDECL to be the same. */
2211 DECL_ATTRIBUTES (olddecl) = DECL_ATTRIBUTES (newdecl);
2213 /* If OLDDECL had its DECL_RTL instantiated, re-invoke make_decl_rtl
2214 so that encode_section_info has a chance to look at the new decl
2215 flags and attributes. */
2216 if (DECL_RTL_SET_P (olddecl)
2217 && (TREE_CODE (olddecl) == FUNCTION_DECL
2218 || (TREE_CODE (olddecl) == VAR_DECL
2219 && TREE_STATIC (olddecl))))
2220 make_decl_rtl (olddecl);
2222 /* The NEWDECL will no longer be needed. Because every out-of-class
2223 declaration of a member results in a call to duplicate_decls,
2224 freeing these nodes represents in a significant savings. */
2230 /* Return zero if the declaration NEWDECL is valid
2231 when the declaration OLDDECL (assumed to be for the same name)
2232 has already been seen.
2233 Otherwise return an error message format string with a %s
2234 where the identifier should go. */
2237 redeclaration_error_message (tree newdecl, tree olddecl)
2239 if (TREE_CODE (newdecl) == TYPE_DECL)
2241 /* Because C++ can put things into name space for free,
2242 constructs like "typedef struct foo { ... } foo"
2243 would look like an erroneous redeclaration. */
2244 if (same_type_p (TREE_TYPE (newdecl), TREE_TYPE (olddecl)))
2247 return G_("redefinition of %q#D");
2249 else if (TREE_CODE (newdecl) == FUNCTION_DECL)
2251 /* If this is a pure function, its olddecl will actually be
2252 the original initialization to `0' (which we force to call
2253 abort()). Don't complain about redefinition in this case. */
2254 if (DECL_LANG_SPECIFIC (olddecl) && DECL_PURE_VIRTUAL_P (olddecl)
2255 && DECL_INITIAL (olddecl) == NULL_TREE)
2258 /* If both functions come from different namespaces, this is not
2259 a redeclaration - this is a conflict with a used function. */
2260 if (DECL_NAMESPACE_SCOPE_P (olddecl)
2261 && DECL_CONTEXT (olddecl) != DECL_CONTEXT (newdecl)
2262 && ! decls_match (olddecl, newdecl))
2263 return G_("%qD conflicts with used function");
2265 /* We'll complain about linkage mismatches in
2266 warn_extern_redeclared_static. */
2268 /* Defining the same name twice is no good. */
2269 if (DECL_INITIAL (olddecl) != NULL_TREE
2270 && DECL_INITIAL (newdecl) != NULL_TREE)
2272 if (DECL_NAME (olddecl) == NULL_TREE)
2273 return G_("%q#D not declared in class");
2274 else if (!GNU_INLINE_P (olddecl)
2275 || GNU_INLINE_P (newdecl))
2276 return G_("redefinition of %q#D");
2279 if (DECL_DECLARED_INLINE_P (olddecl) && DECL_DECLARED_INLINE_P (newdecl))
2281 bool olda = GNU_INLINE_P (olddecl);
2282 bool newa = GNU_INLINE_P (newdecl);
2287 return G_("%q+D redeclared inline with "
2288 "%<gnu_inline%> attribute");
2290 return G_("%q+D redeclared inline without "
2291 "%<gnu_inline%> attribute");
2297 else if (TREE_CODE (newdecl) == TEMPLATE_DECL)
2301 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
2303 if (COMPLETE_TYPE_P (TREE_TYPE (newdecl))
2304 && COMPLETE_TYPE_P (TREE_TYPE (olddecl)))
2305 return G_("redefinition of %q#D");
2309 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) != FUNCTION_DECL
2310 || (DECL_TEMPLATE_RESULT (newdecl)
2311 == DECL_TEMPLATE_RESULT (olddecl)))
2314 nt = DECL_TEMPLATE_RESULT (newdecl);
2315 if (DECL_TEMPLATE_INFO (nt))
2316 nt = DECL_TEMPLATE_RESULT (template_for_substitution (nt));
2317 ot = DECL_TEMPLATE_RESULT (olddecl);
2318 if (DECL_TEMPLATE_INFO (ot))
2319 ot = DECL_TEMPLATE_RESULT (template_for_substitution (ot));
2320 if (DECL_INITIAL (nt) && DECL_INITIAL (ot)
2321 && (!GNU_INLINE_P (ot) || GNU_INLINE_P (nt)))
2322 return G_("redefinition of %q#D");
2324 if (DECL_DECLARED_INLINE_P (ot) && DECL_DECLARED_INLINE_P (nt))
2326 bool olda = GNU_INLINE_P (ot);
2327 bool newa = GNU_INLINE_P (nt);
2332 return G_("%q+D redeclared inline with "
2333 "%<gnu_inline%> attribute");
2335 return G_("%q+D redeclared inline without "
2336 "%<gnu_inline%> attribute");
2340 /* Core issue #226 (C++0x):
2342 If a friend function template declaration specifies a
2343 default template-argument, that declaration shall be a
2344 definition and shall be the only declaration of the
2345 function template in the translation unit. */
2346 if ((cxx_dialect != cxx98)
2347 && TREE_CODE (ot) == FUNCTION_DECL && DECL_FRIEND_P (ot)
2348 && !check_default_tmpl_args (nt, DECL_TEMPLATE_PARMS (newdecl),
2349 /*is_primary=*/1, /*is_partial=*/0,
2350 /*is_friend_decl=*/2))
2351 return G_("redeclaration of friend %q#D "
2352 "may not have default template arguments");
2356 else if (TREE_CODE (newdecl) == VAR_DECL
2357 && DECL_THREAD_LOCAL_P (newdecl) != DECL_THREAD_LOCAL_P (olddecl)
2358 && (! DECL_LANG_SPECIFIC (olddecl)
2359 || ! CP_DECL_THREADPRIVATE_P (olddecl)
2360 || DECL_THREAD_LOCAL_P (newdecl)))
2362 /* Only variables can be thread-local, and all declarations must
2363 agree on this property. */
2364 if (DECL_THREAD_LOCAL_P (newdecl))
2365 return G_("thread-local declaration of %q#D follows "
2366 "non-thread-local declaration");
2368 return G_("non-thread-local declaration of %q#D follows "
2369 "thread-local declaration");
2371 else if (toplevel_bindings_p () || DECL_NAMESPACE_SCOPE_P (newdecl))
2373 /* The objects have been declared at namespace scope. If either
2374 is a member of an anonymous union, then this is an invalid
2375 redeclaration. For example:
2381 if ((TREE_CODE (newdecl) == VAR_DECL && DECL_ANON_UNION_VAR_P (newdecl))
2382 || (TREE_CODE (olddecl) == VAR_DECL && DECL_ANON_UNION_VAR_P (olddecl)))
2383 return G_("redeclaration of %q#D");
2384 /* If at least one declaration is a reference, there is no
2385 conflict. For example:
2391 if (DECL_EXTERNAL (newdecl) || DECL_EXTERNAL (olddecl))
2393 /* Reject two definitions. */
2394 return G_("redefinition of %q#D");
2398 /* Objects declared with block scope: */
2399 /* Reject two definitions, and reject a definition
2400 together with an external reference. */
2401 if (!(DECL_EXTERNAL (newdecl) && DECL_EXTERNAL (olddecl)))
2402 return G_("redeclaration of %q#D");
2407 /* Hash and equality functions for the named_label table. */
2410 named_label_entry_hash (const void *data)
2412 const struct named_label_entry *ent = (const struct named_label_entry *) data;
2413 return DECL_UID (ent->label_decl);
2417 named_label_entry_eq (const void *a, const void *b)
2419 const struct named_label_entry *ent_a = (const struct named_label_entry *) a;
2420 const struct named_label_entry *ent_b = (const struct named_label_entry *) b;
2421 return ent_a->label_decl == ent_b->label_decl;
2424 /* Create a new label, named ID. */
2427 make_label_decl (tree id, int local_p)
2429 struct named_label_entry *ent;
2433 decl = build_decl (input_location, LABEL_DECL, id, void_type_node);
2435 DECL_CONTEXT (decl) = current_function_decl;
2436 DECL_MODE (decl) = VOIDmode;
2437 C_DECLARED_LABEL_FLAG (decl) = local_p;
2439 /* Say where one reference is to the label, for the sake of the
2440 error if it is not defined. */
2441 DECL_SOURCE_LOCATION (decl) = input_location;
2443 /* Record the fact that this identifier is bound to this label. */
2444 SET_IDENTIFIER_LABEL_VALUE (id, decl);
2446 /* Create the label htab for the function on demand. */
2448 named_labels = htab_create_ggc (13, named_label_entry_hash,
2449 named_label_entry_eq, NULL);
2451 /* Record this label on the list of labels used in this function.
2452 We do this before calling make_label_decl so that we get the
2453 IDENTIFIER_LABEL_VALUE before the new label is declared. */
2454 ent = GGC_CNEW (struct named_label_entry);
2455 ent->label_decl = decl;
2457 slot = htab_find_slot (named_labels, ent, INSERT);
2458 gcc_assert (*slot == NULL);
2464 /* Look for a label named ID in the current function. If one cannot
2465 be found, create one. (We keep track of used, but undefined,
2466 labels, and complain about them at the end of a function.) */
2469 lookup_label (tree id)
2473 timevar_push (TV_NAME_LOOKUP);
2474 /* You can't use labels at global scope. */
2475 if (current_function_decl == NULL_TREE)
2477 error ("label %qE referenced outside of any function", id);
2478 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, NULL_TREE);
2481 /* See if we've already got this label. */
2482 decl = IDENTIFIER_LABEL_VALUE (id);
2483 if (decl != NULL_TREE && DECL_CONTEXT (decl) == current_function_decl)
2484 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2486 decl = make_label_decl (id, /*local_p=*/0);
2487 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2490 /* Declare a local label named ID. */
2493 declare_local_label (tree id)
2497 /* Add a new entry to the SHADOWED_LABELS list so that when we leave
2498 this scope we can restore the old value of IDENTIFIER_TYPE_VALUE. */
2499 shadow = tree_cons (IDENTIFIER_LABEL_VALUE (id), NULL_TREE,
2500 current_binding_level->shadowed_labels);
2501 current_binding_level->shadowed_labels = shadow;
2503 decl = make_label_decl (id, /*local_p=*/1);
2504 TREE_VALUE (shadow) = decl;
2509 /* Returns nonzero if it is ill-formed to jump past the declaration of
2510 DECL. Returns 2 if it's also a real problem. */
2513 decl_jump_unsafe (tree decl)
2515 /* [stmt.dcl]/3: A program that jumps from a point where a local variable
2516 with automatic storage duration is not in scope to a point where it is
2517 in scope is ill-formed unless the variable has scalar type, class type
2518 with a trivial default constructor and a trivial destructor, a
2519 cv-qualified version of one of these types, or an array of one of the
2520 preceding types and is declared without an initializer (8.5). */
2521 tree type = TREE_TYPE (decl);
2523 if (TREE_CODE (decl) != VAR_DECL || TREE_STATIC (decl)
2524 || type == error_mark_node)
2527 type = strip_array_types (type);
2529 if (type_has_nontrivial_default_init (TREE_TYPE (decl))
2530 || DECL_NONTRIVIALLY_INITIALIZED_P (decl))
2533 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
2539 /* A subroutine of check_previous_goto_1 to identify a branch to the user. */
2542 identify_goto (tree decl, const location_t *locus)
2545 permerror (input_location, "jump to label %qD", decl);
2547 permerror (input_location, "jump to case label");
2549 permerror (*locus, " from here");
2552 /* Check that a single previously seen jump to a newly defined label
2553 is OK. DECL is the LABEL_DECL or 0; LEVEL is the binding_level for
2554 the jump context; NAMES are the names in scope in LEVEL at the jump
2555 context; LOCUS is the source position of the jump or 0. Returns
2556 true if all is well. */
2559 check_previous_goto_1 (tree decl, struct cp_binding_level* level, tree names,
2560 bool exited_omp, const location_t *locus)
2562 struct cp_binding_level *b;
2563 bool identified = false, saw_eh = false, saw_omp = false;
2567 identify_goto (decl, locus);
2568 error (" exits OpenMP structured block");
2569 identified = saw_omp = true;
2572 for (b = current_binding_level; b ; b = b->level_chain)
2574 tree new_decls, old_decls = (b == level ? names : NULL_TREE);
2576 for (new_decls = b->names; new_decls != old_decls;
2577 new_decls = TREE_CHAIN (new_decls))
2579 int problem = decl_jump_unsafe (new_decls);
2585 identify_goto (decl, locus);
2589 error (" crosses initialization of %q+#D", new_decls);
2591 permerror (input_location, " enters scope of %q+#D which has "
2592 "non-trivial destructor", new_decls);
2597 if ((b->kind == sk_try || b->kind == sk_catch) && !saw_eh)
2601 identify_goto (decl, locus);
2604 if (b->kind == sk_try)
2605 error (" enters try block");
2607 error (" enters catch block");
2610 if (b->kind == sk_omp && !saw_omp)
2614 identify_goto (decl, locus);
2617 error (" enters OpenMP structured block");
2626 check_previous_goto (tree decl, struct named_label_use_entry *use)
2628 check_previous_goto_1 (decl, use->binding_level,
2629 use->names_in_scope, use->in_omp_scope,
2630 &use->o_goto_locus);
2634 check_switch_goto (struct cp_binding_level* level)
2636 return check_previous_goto_1 (NULL_TREE, level, level->names, false, NULL);
2639 /* Check that a new jump to a label DECL is OK. Called by
2640 finish_goto_stmt. */
2643 check_goto (tree decl)
2645 struct named_label_entry *ent, dummy;
2646 bool saw_catch = false, identified = false;
2649 /* We can't know where a computed goto is jumping.
2650 So we assume that it's OK. */
2651 if (TREE_CODE (decl) != LABEL_DECL)
2654 /* We didn't record any information about this label when we created it,
2655 and there's not much point since it's trivial to analyze as a return. */
2656 if (decl == cdtor_label)
2659 dummy.label_decl = decl;
2660 ent = (struct named_label_entry *) htab_find (named_labels, &dummy);
2661 gcc_assert (ent != NULL);
2663 /* If the label hasn't been defined yet, defer checking. */
2664 if (! DECL_INITIAL (decl))
2666 struct named_label_use_entry *new_use;
2668 /* Don't bother creating another use if the last goto had the
2669 same data, and will therefore create the same set of errors. */
2671 && ent->uses->names_in_scope == current_binding_level->names)
2674 new_use = GGC_NEW (struct named_label_use_entry);
2675 new_use->binding_level = current_binding_level;
2676 new_use->names_in_scope = current_binding_level->names;
2677 new_use->o_goto_locus = input_location;
2678 new_use->in_omp_scope = false;
2680 new_use->next = ent->uses;
2681 ent->uses = new_use;
2685 if (ent->in_try_scope || ent->in_catch_scope
2686 || ent->in_omp_scope || ent->bad_decls)
2688 permerror (input_location, "jump to label %q+D", decl);
2689 permerror (input_location, " from here");
2693 for (bad = ent->bad_decls; bad; bad = TREE_CHAIN (bad))
2695 tree b = TREE_VALUE (bad);
2696 int u = decl_jump_unsafe (b);
2698 if (u > 1 && DECL_ARTIFICIAL (b))
2700 /* Can't skip init of __exception_info. */
2701 error_at (DECL_SOURCE_LOCATION (b), " enters catch block");
2705 error (" skips initialization of %q+#D", b);
2707 permerror (input_location, " enters scope of %q+#D which has "
2708 "non-trivial destructor", b);
2711 if (ent->in_try_scope)
2712 error (" enters try block");
2713 else if (ent->in_catch_scope && !saw_catch)
2714 error (" enters catch block");
2716 if (ent->in_omp_scope)
2717 error (" enters OpenMP structured block");
2718 else if (flag_openmp)
2720 struct cp_binding_level *b;
2721 for (b = current_binding_level; b ; b = b->level_chain)
2723 if (b == ent->binding_level)
2725 if (b->kind == sk_omp)
2729 permerror (input_location, "jump to label %q+D", decl);
2730 permerror (input_location, " from here");
2733 error (" exits OpenMP structured block");
2740 /* Check that a return is ok wrt OpenMP structured blocks.
2741 Called by finish_return_stmt. Returns true if all is well. */
2744 check_omp_return (void)
2746 struct cp_binding_level *b;
2747 for (b = current_binding_level; b ; b = b->level_chain)
2748 if (b->kind == sk_omp)
2750 error ("invalid exit from OpenMP structured block");
2756 /* Define a label, specifying the location in the source file.
2757 Return the LABEL_DECL node for the label. */
2760 define_label (location_t location, tree name)
2762 struct named_label_entry *ent, dummy;
2763 struct cp_binding_level *p;
2766 timevar_push (TV_NAME_LOOKUP);
2768 decl = lookup_label (name);
2770 dummy.label_decl = decl;
2771 ent = (struct named_label_entry *) htab_find (named_labels, &dummy);
2772 gcc_assert (ent != NULL);
2774 /* After labels, make any new cleanups in the function go into their
2775 own new (temporary) binding contour. */
2776 for (p = current_binding_level;
2777 p->kind != sk_function_parms;
2779 p->more_cleanups_ok = 0;
2781 if (name == get_identifier ("wchar_t"))
2782 permerror (input_location, "label named wchar_t");
2784 if (DECL_INITIAL (decl) != NULL_TREE)
2786 error ("duplicate label %qD", decl);
2787 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
2791 struct named_label_use_entry *use;
2793 /* Mark label as having been defined. */
2794 DECL_INITIAL (decl) = error_mark_node;
2795 /* Say where in the source. */
2796 DECL_SOURCE_LOCATION (decl) = location;
2798 ent->binding_level = current_binding_level;
2799 ent->names_in_scope = current_binding_level->names;
2801 for (use = ent->uses; use ; use = use->next)
2802 check_previous_goto (decl, use);
2806 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2811 struct cp_binding_level *level;
2812 struct cp_switch *next;
2813 /* The SWITCH_STMT being built. */
2815 /* A splay-tree mapping the low element of a case range to the high
2816 element, or NULL_TREE if there is no high element. Used to
2817 determine whether or not a new case label duplicates an old case
2818 label. We need a tree, rather than simply a hash table, because
2819 of the GNU case range extension. */
2823 /* A stack of the currently active switch statements. The innermost
2824 switch statement is on the top of the stack. There is no need to
2825 mark the stack for garbage collection because it is only active
2826 during the processing of the body of a function, and we never
2827 collect at that point. */
2829 static struct cp_switch *switch_stack;
2831 /* Called right after a switch-statement condition is parsed.
2832 SWITCH_STMT is the switch statement being parsed. */
2835 push_switch (tree switch_stmt)
2837 struct cp_switch *p = XNEW (struct cp_switch);
2838 p->level = current_binding_level;
2839 p->next = switch_stack;
2840 p->switch_stmt = switch_stmt;
2841 p->cases = splay_tree_new (case_compare, NULL, NULL);
2848 struct cp_switch *cs = switch_stack;
2849 location_t switch_location;
2851 /* Emit warnings as needed. */
2852 if (EXPR_HAS_LOCATION (cs->switch_stmt))
2853 switch_location = EXPR_LOCATION (cs->switch_stmt);
2855 switch_location = input_location;
2856 if (!processing_template_decl)
2857 c_do_switch_warnings (cs->cases, switch_location,
2858 SWITCH_STMT_TYPE (cs->switch_stmt),
2859 SWITCH_STMT_COND (cs->switch_stmt));
2861 splay_tree_delete (cs->cases);
2862 switch_stack = switch_stack->next;
2866 /* Note that we've seen a definition of a case label, and complain if this
2867 is a bad place for one. */
2870 finish_case_label (location_t loc, tree low_value, tree high_value)
2873 struct cp_binding_level *p;
2875 if (processing_template_decl)
2879 /* For templates, just add the case label; we'll do semantic
2880 analysis at instantiation-time. */
2881 label = build_decl (loc, LABEL_DECL, NULL_TREE, NULL_TREE);
2882 return add_stmt (build_case_label (loc, low_value, high_value, label));
2885 /* Find the condition on which this switch statement depends. */
2886 cond = SWITCH_STMT_COND (switch_stack->switch_stmt);
2887 if (cond && TREE_CODE (cond) == TREE_LIST)
2888 cond = TREE_VALUE (cond);
2890 if (!check_switch_goto (switch_stack->level))
2891 return error_mark_node;
2893 r = c_add_case_label (loc, switch_stack->cases, cond,
2894 SWITCH_STMT_TYPE (switch_stack->switch_stmt),
2895 low_value, high_value);
2897 /* After labels, make any new cleanups in the function go into their
2898 own new (temporary) binding contour. */
2899 for (p = current_binding_level;
2900 p->kind != sk_function_parms;
2902 p->more_cleanups_ok = 0;
2907 /* Hash a TYPENAME_TYPE. K is really of type `tree'. */
2910 typename_hash (const void* k)
2913 const_tree const t = (const_tree) k;
2915 hash = (htab_hash_pointer (TYPE_CONTEXT (t))
2916 ^ htab_hash_pointer (DECL_NAME (TYPE_NAME (t))));
2921 typedef struct typename_info {
2929 /* Compare two TYPENAME_TYPEs. K1 is really of type `tree', K2 is
2930 really of type `typename_info*' */
2933 typename_compare (const void * k1, const void * k2)
2935 const_tree const t1 = (const_tree) k1;
2936 const typename_info *const t2 = (const typename_info *) k2;
2938 return (DECL_NAME (TYPE_NAME (t1)) == t2->name
2939 && TYPE_CONTEXT (t1) == t2->scope
2940 && TYPENAME_TYPE_FULLNAME (t1) == t2->template_id
2941 && TYPENAME_IS_ENUM_P (t1) == t2->enum_p
2942 && TYPENAME_IS_CLASS_P (t1) == t2->class_p);
2945 /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
2946 the type of `T', NAME is the IDENTIFIER_NODE for `t'.
2948 Returns the new TYPENAME_TYPE. */
2950 static GTY ((param_is (union tree_node))) htab_t typename_htab;
2953 build_typename_type (tree context, tree name, tree fullname,
2954 enum tag_types tag_type)
2962 if (typename_htab == NULL)
2963 typename_htab = htab_create_ggc (61, &typename_hash,
2964 &typename_compare, NULL);
2966 ti.scope = FROB_CONTEXT (context);
2968 ti.template_id = fullname;
2969 ti.enum_p = tag_type == enum_type;
2970 ti.class_p = (tag_type == class_type
2971 || tag_type == record_type
2972 || tag_type == union_type);
2973 hash = (htab_hash_pointer (ti.scope)
2974 ^ htab_hash_pointer (ti.name));
2976 /* See if we already have this type. */
2977 e = htab_find_slot_with_hash (typename_htab, &ti, hash, INSERT);
2982 /* Build the TYPENAME_TYPE. */
2983 t = cxx_make_type (TYPENAME_TYPE);
2984 TYPE_CONTEXT (t) = ti.scope;
2985 TYPENAME_TYPE_FULLNAME (t) = ti.template_id;
2986 TYPENAME_IS_ENUM_P (t) = ti.enum_p;
2987 TYPENAME_IS_CLASS_P (t) = ti.class_p;
2989 /* Build the corresponding TYPE_DECL. */
2990 d = build_decl (input_location, TYPE_DECL, name, t);
2991 TYPE_NAME (TREE_TYPE (d)) = d;
2992 TYPE_STUB_DECL (TREE_TYPE (d)) = d;
2993 DECL_CONTEXT (d) = FROB_CONTEXT (context);
2994 DECL_ARTIFICIAL (d) = 1;
2996 /* Store it in the hash table. */
2999 /* TYPENAME_TYPEs must always be compared structurally, because
3000 they may or may not resolve down to another type depending on
3001 the currently open classes. */
3002 SET_TYPE_STRUCTURAL_EQUALITY (t);
3008 /* Resolve `typename CONTEXT::NAME'. TAG_TYPE indicates the tag
3009 provided to name the type. Returns an appropriate type, unless an
3010 error occurs, in which case error_mark_node is returned. If we
3011 locate a non-artificial TYPE_DECL and TF_KEEP_TYPE_DECL is set, we
3012 return that, rather than the _TYPE it corresponds to, in other
3013 cases we look through the type decl. If TF_ERROR is set, complain
3014 about errors, otherwise be quiet. */
3017 make_typename_type (tree context, tree name, enum tag_types tag_type,
3018 tsubst_flags_t complain)
3024 if (name == error_mark_node
3025 || context == NULL_TREE
3026 || context == error_mark_node)
3027 return error_mark_node;
3031 if (!(TYPE_LANG_SPECIFIC (name)
3032 && (CLASSTYPE_IS_TEMPLATE (name)
3033 || CLASSTYPE_USE_TEMPLATE (name))))
3034 name = TYPE_IDENTIFIER (name);
3036 /* Create a TEMPLATE_ID_EXPR for the type. */
3037 name = build_nt (TEMPLATE_ID_EXPR,
3038 CLASSTYPE_TI_TEMPLATE (name),
3039 CLASSTYPE_TI_ARGS (name));
3041 else if (TREE_CODE (name) == TYPE_DECL)
3042 name = DECL_NAME (name);
3046 if (TREE_CODE (name) == TEMPLATE_ID_EXPR)
3048 name = TREE_OPERAND (name, 0);
3049 if (TREE_CODE (name) == TEMPLATE_DECL)
3050 name = TREE_OPERAND (fullname, 0) = DECL_NAME (name);
3051 else if (TREE_CODE (name) == OVERLOAD)
3053 error ("%qD is not a type", name);
3054 return error_mark_node;
3057 if (TREE_CODE (name) == TEMPLATE_DECL)
3059 error ("%qD used without template parameters", name);
3060 return error_mark_node;
3062 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
3063 gcc_assert (TYPE_P (context));
3065 if (!MAYBE_CLASS_TYPE_P (context))
3067 if (complain & tf_error)
3068 error ("%q#T is not a class", context);
3069 return error_mark_node;
3072 /* When the CONTEXT is a dependent type, NAME could refer to a
3073 dependent base class of CONTEXT. But look inside it anyway
3074 if CONTEXT is a currently open scope, in case it refers to a
3075 member of the current instantiation or a non-dependent base;
3076 lookup will stop when we hit a dependent base. */
3077 if (!dependent_scope_p (context))
3078 /* We should only set WANT_TYPE when we're a nested typename type.
3079 Then we can give better diagnostics if we find a non-type. */
3080 t = lookup_field (context, name, 2, /*want_type=*/true);
3084 if ((!t || TREE_CODE (t) == TREE_LIST) && dependent_type_p (context))
3085 return build_typename_type (context, name, fullname, tag_type);
3087 want_template = TREE_CODE (fullname) == TEMPLATE_ID_EXPR;
3091 if (complain & tf_error)
3092 error (want_template ? "no class template named %q#T in %q#T"
3093 : "no type named %q#T in %q#T", name, context);
3094 return error_mark_node;
3097 /* Pull out the template from an injected-class-name (or multiple). */
3099 t = maybe_get_template_decl_from_type_decl (t);
3101 if (TREE_CODE (t) == TREE_LIST)
3103 if (complain & tf_error)
3105 error ("lookup of %qT in %qT is ambiguous", name, context);
3106 print_candidates (t);
3108 return error_mark_node;
3111 if (want_template && !DECL_CLASS_TEMPLATE_P (t))
3113 if (complain & tf_error)
3114 error ("%<typename %T::%D%> names %q#T, which is not a class template",
3116 return error_mark_node;
3118 if (!want_template && TREE_CODE (t) != TYPE_DECL)
3120 if (complain & tf_error)
3121 error ("%<typename %T::%D%> names %q#T, which is not a type",
3123 return error_mark_node;
3126 if (complain & tf_error)
3127 perform_or_defer_access_check (TYPE_BINFO (context), t, t);
3129 /* If we are currently parsing a template and if T is a typedef accessed
3130 through CONTEXT then we need to remember and check access of T at
3131 template instantiation time. */
3132 add_typedef_to_current_template_for_access_check (t, context, input_location);
3135 return lookup_template_class (t, TREE_OPERAND (fullname, 1),
3137 /*entering_scope=*/0,
3138 tf_warning_or_error | tf_user);
3140 if (DECL_ARTIFICIAL (t) || !(complain & tf_keep_type_decl))
3146 /* Resolve `CONTEXT::template NAME'. Returns a TEMPLATE_DECL if the name
3147 can be resolved or an UNBOUND_CLASS_TEMPLATE, unless an error occurs,
3148 in which case error_mark_node is returned.
3150 If PARM_LIST is non-NULL, also make sure that the template parameter
3151 list of TEMPLATE_DECL matches.
3153 If COMPLAIN zero, don't complain about any errors that occur. */
3156 make_unbound_class_template (tree context, tree name, tree parm_list,
3157 tsubst_flags_t complain)
3163 name = TYPE_IDENTIFIER (name);
3164 else if (DECL_P (name))
3165 name = DECL_NAME (name);
3166 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
3168 if (!dependent_type_p (context)
3169 || currently_open_class (context))
3171 tree tmpl = NULL_TREE;
3173 if (MAYBE_CLASS_TYPE_P (context))
3174 tmpl = lookup_field (context, name, 0, false);
3176 if (!tmpl || !DECL_CLASS_TEMPLATE_P (tmpl))
3178 if (complain & tf_error)
3179 error ("no class template named %q#T in %q#T", name, context);
3180 return error_mark_node;
3184 && !comp_template_parms (DECL_TEMPLATE_PARMS (tmpl), parm_list))
3186 if (complain & tf_error)
3188 error ("template parameters do not match template");
3189 error ("%q+D declared here", tmpl);
3191 return error_mark_node;
3194 if (complain & tf_error)
3195 perform_or_defer_access_check (TYPE_BINFO (context), tmpl, tmpl);
3200 /* Build the UNBOUND_CLASS_TEMPLATE. */
3201 t = cxx_make_type (UNBOUND_CLASS_TEMPLATE);
3202 TYPE_CONTEXT (t) = FROB_CONTEXT (context);
3203 TREE_TYPE (t) = NULL_TREE;
3204 SET_TYPE_STRUCTURAL_EQUALITY (t);
3206 /* Build the corresponding TEMPLATE_DECL. */
3207 d = build_decl (input_location, TEMPLATE_DECL, name, t);
3208 TYPE_NAME (TREE_TYPE (d)) = d;
3209 TYPE_STUB_DECL (TREE_TYPE (d)) = d;
3210 DECL_CONTEXT (d) = FROB_CONTEXT (context);
3211 DECL_ARTIFICIAL (d) = 1;
3212 DECL_TEMPLATE_PARMS (d) = parm_list;
3219 /* Push the declarations of builtin types into the namespace.
3220 RID_INDEX is the index of the builtin type in the array
3221 RID_POINTERS. NAME is the name used when looking up the builtin
3222 type. TYPE is the _TYPE node for the builtin type. */
3225 record_builtin_type (enum rid rid_index,
3229 tree rname = NULL_TREE, tname = NULL_TREE;
3230 tree tdecl = NULL_TREE;
3232 if ((int) rid_index < (int) RID_MAX)
3233 rname = ridpointers[(int) rid_index];
3235 tname = get_identifier (name);
3237 /* The calls to SET_IDENTIFIER_GLOBAL_VALUE below should be
3238 eliminated. Built-in types should not be looked up name; their
3239 names are keywords that the parser can recognize. However, there
3240 is code in c-common.c that uses identifier_global_value to look
3241 up built-in types by name. */
3244 tdecl = build_decl (BUILTINS_LOCATION, TYPE_DECL, tname, type);
3245 DECL_ARTIFICIAL (tdecl) = 1;
3246 SET_IDENTIFIER_GLOBAL_VALUE (tname, tdecl);
3252 tdecl = build_decl (BUILTINS_LOCATION, TYPE_DECL, rname, type);
3253 DECL_ARTIFICIAL (tdecl) = 1;
3255 SET_IDENTIFIER_GLOBAL_VALUE (rname, tdecl);
3258 if (!TYPE_NAME (type))
3259 TYPE_NAME (type) = tdecl;
3262 debug_hooks->type_decl (tdecl, 0);
3265 /* Record one of the standard Java types.
3266 * Declare it as having the given NAME.
3267 * If SIZE > 0, it is the size of one of the integral types;
3268 * otherwise it is the negative of the size of one of the other types. */
3271 record_builtin_java_type (const char* name, int size)
3275 type = build_nonstandard_integer_type (size, 0);
3276 else if (size > -32)
3279 /* "__java_char" or ""__java_boolean". */
3280 type = build_nonstandard_integer_type (-size, 1);
3281 /* Get the signed type cached and attached to the unsigned type,
3282 so it doesn't get garbage-collected at "random" times,
3283 causing potential codegen differences out of different UIDs
3284 and different alias set numbers. */
3285 stype = build_nonstandard_integer_type (-size, 0);
3286 TREE_CHAIN (type) = stype;
3287 /*if (size == -1) TREE_SET_CODE (type, BOOLEAN_TYPE);*/
3290 { /* "__java_float" or ""__java_double". */
3291 type = make_node (REAL_TYPE);
3292 TYPE_PRECISION (type) = - size;
3295 record_builtin_type (RID_MAX, name, type);
3296 decl = TYPE_NAME (type);
3298 /* Suppress generate debug symbol entries for these types,
3299 since for normal C++ they are just clutter.
3300 However, push_lang_context undoes this if extern "Java" is seen. */
3301 DECL_IGNORED_P (decl) = 1;
3303 TYPE_FOR_JAVA (type) = 1;
3307 /* Push a type into the namespace so that the back ends ignore it. */
3310 record_unknown_type (tree type, const char* name)
3312 tree decl = pushdecl (build_decl (UNKNOWN_LOCATION,
3313 TYPE_DECL, get_identifier (name), type));
3314 /* Make sure the "unknown type" typedecl gets ignored for debug info. */
3315 DECL_IGNORED_P (decl) = 1;
3316 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
3317 TYPE_SIZE (type) = TYPE_SIZE (void_type_node);
3318 TYPE_ALIGN (type) = 1;
3319 TYPE_USER_ALIGN (type) = 0;
3320 SET_TYPE_MODE (type, TYPE_MODE (void_type_node));
3323 /* A string for which we should create an IDENTIFIER_NODE at
3326 typedef struct predefined_identifier
3328 /* The name of the identifier. */
3329 const char *const name;
3330 /* The place where the IDENTIFIER_NODE should be stored. */
3332 /* Nonzero if this is the name of a constructor or destructor. */
3333 const int ctor_or_dtor_p;
3334 } predefined_identifier;
3336 /* Create all the predefined identifiers. */
3339 initialize_predefined_identifiers (void)
3341 const predefined_identifier *pid;
3343 /* A table of identifiers to create at startup. */
3344 static const predefined_identifier predefined_identifiers[] = {
3345 { "C++", &lang_name_cplusplus, 0 },
3346 { "C", &lang_name_c, 0 },
3347 { "Java", &lang_name_java, 0 },
3348 /* Some of these names have a trailing space so that it is
3349 impossible for them to conflict with names written by users. */
3350 { "__ct ", &ctor_identifier, 1 },
3351 { "__base_ctor ", &base_ctor_identifier, 1 },
3352 { "__comp_ctor ", &complete_ctor_identifier, 1 },
3353 { "__dt ", &dtor_identifier, 1 },
3354 { "__comp_dtor ", &complete_dtor_identifier, 1 },
3355 { "__base_dtor ", &base_dtor_identifier, 1 },
3356 { "__deleting_dtor ", &deleting_dtor_identifier, 1 },
3357 { IN_CHARGE_NAME, &in_charge_identifier, 0 },
3358 { "nelts", &nelts_identifier, 0 },
3359 { THIS_NAME, &this_identifier, 0 },
3360 { VTABLE_DELTA_NAME, &delta_identifier, 0 },
3361 { VTABLE_PFN_NAME, &pfn_identifier, 0 },
3362 { "_vptr", &vptr_identifier, 0 },
3363 { "__vtt_parm", &vtt_parm_identifier, 0 },
3364 { "::", &global_scope_name, 0 },
3365 { "std", &std_identifier, 0 },
3369 for (pid = predefined_identifiers; pid->name; ++pid)
3371 *pid->node = get_identifier (pid->name);
3372 if (pid->ctor_or_dtor_p)
3373 IDENTIFIER_CTOR_OR_DTOR_P (*pid->node) = 1;
3377 /* Create the predefined scalar types of C,
3378 and some nodes representing standard constants (0, 1, (void *)0).
3379 Initialize the global binding level.
3380 Make definitions for built-in primitive functions. */
3383 cxx_init_decl_processing (void)
3386 tree void_ftype_ptr;
3388 build_common_tree_nodes (flag_signed_char);
3390 /* Create all the identifiers we need. */
3391 initialize_predefined_identifiers ();
3393 /* Create the global variables. */
3394 push_to_top_level ();
3396 current_function_decl = NULL_TREE;
3397 current_binding_level = NULL;
3398 /* Enter the global namespace. */
3399 gcc_assert (global_namespace == NULL_TREE);
3400 global_namespace = build_lang_decl (NAMESPACE_DECL, global_scope_name,
3402 TREE_PUBLIC (global_namespace) = 1;
3403 begin_scope (sk_namespace, global_namespace);
3405 current_lang_name = NULL_TREE;
3407 if (flag_visibility_ms_compat)
3408 default_visibility = VISIBILITY_HIDDEN;
3411 current_lang_name = lang_name_c;
3413 /* Create the `std' namespace. */
3414 push_namespace (std_identifier);
3415 std_node = current_namespace;
3418 c_common_nodes_and_builtins ();
3420 java_byte_type_node = record_builtin_java_type ("__java_byte", 8);
3421 java_short_type_node = record_builtin_java_type ("__java_short", 16);
3422 java_int_type_node = record_builtin_java_type ("__java_int", 32);
3423 java_long_type_node = record_builtin_java_type ("__java_long", 64);
3424 java_float_type_node = record_builtin_java_type ("__java_float", -32);
3425 java_double_type_node = record_builtin_java_type ("__java_double", -64);
3426 java_char_type_node = record_builtin_java_type ("__java_char", -16);
3427 java_boolean_type_node = record_builtin_java_type ("__java_boolean", -1);
3429 integer_two_node = build_int_cst (NULL_TREE, 2);
3430 integer_three_node = build_int_cst (NULL_TREE, 3);
3432 record_builtin_type (RID_BOOL, "bool", boolean_type_node);
3433 truthvalue_type_node = boolean_type_node;
3434 truthvalue_false_node = boolean_false_node;
3435 truthvalue_true_node = boolean_true_node;
3437 empty_except_spec = build_tree_list (NULL_TREE, NULL_TREE);
3440 record_builtin_type (RID_MAX, NULL, string_type_node);
3443 delta_type_node = ptrdiff_type_node;
3444 vtable_index_type = ptrdiff_type_node;
3446 vtt_parm_type = build_pointer_type (const_ptr_type_node);
3447 void_ftype = build_function_type (void_type_node, void_list_node);
3448 void_ftype_ptr = build_function_type (void_type_node,
3449 tree_cons (NULL_TREE,
3453 = build_exception_variant (void_ftype_ptr, empty_except_spec);
3455 /* C++ extensions */
3457 unknown_type_node = make_node (LANG_TYPE);
3458 record_unknown_type (unknown_type_node, "unknown type");
3460 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
3461 TREE_TYPE (unknown_type_node) = unknown_type_node;
3463 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
3465 TYPE_POINTER_TO (unknown_type_node) = unknown_type_node;
3466 TYPE_REFERENCE_TO (unknown_type_node) = unknown_type_node;
3468 init_list_type_node = make_node (LANG_TYPE);
3469 record_unknown_type (init_list_type_node, "init list");
3472 /* Make sure we get a unique function type, so we can give
3473 its pointer type a name. (This wins for gdb.) */
3474 tree vfunc_type = make_node (FUNCTION_TYPE);
3475 TREE_TYPE (vfunc_type) = integer_type_node;
3476 TYPE_ARG_TYPES (vfunc_type) = NULL_TREE;
3477 layout_type (vfunc_type);
3479 vtable_entry_type = build_pointer_type (vfunc_type);
3481 record_builtin_type (RID_MAX, VTBL_PTR_TYPE, vtable_entry_type);
3484 = build_cplus_array_type (vtable_entry_type, NULL_TREE);
3485 layout_type (vtbl_type_node);
3486 vtbl_type_node = cp_build_qualified_type (vtbl_type_node, TYPE_QUAL_CONST);
3487 record_builtin_type (RID_MAX, NULL, vtbl_type_node);
3488 vtbl_ptr_type_node = build_pointer_type (vtable_entry_type);
3489 layout_type (vtbl_ptr_type_node);
3490 record_builtin_type (RID_MAX, NULL, vtbl_ptr_type_node);
3492 push_namespace (get_identifier ("__cxxabiv1"));
3493 abi_node = current_namespace;
3496 global_type_node = make_node (LANG_TYPE);
3497 record_unknown_type (global_type_node, "global type");
3500 current_lang_name = lang_name_cplusplus;
3504 tree bad_alloc_type_node;
3505 tree bad_alloc_decl;
3506 tree newtype, deltype;
3507 tree ptr_ftype_sizetype;
3509 push_namespace (std_identifier);
3510 bad_alloc_id = get_identifier ("bad_alloc");
3511 bad_alloc_type_node = make_class_type (RECORD_TYPE);
3512 TYPE_CONTEXT (bad_alloc_type_node) = current_namespace;
3514 = create_implicit_typedef (bad_alloc_id, bad_alloc_type_node);
3515 DECL_CONTEXT (bad_alloc_decl) = current_namespace;
3519 = build_function_type (ptr_type_node,
3520 tree_cons (NULL_TREE,
3523 newtype = build_exception_variant
3524 (ptr_ftype_sizetype, add_exception_specifier
3525 (NULL_TREE, bad_alloc_type_node, -1));
3526 deltype = build_exception_variant (void_ftype_ptr, empty_except_spec);
3527 push_cp_library_fn (NEW_EXPR, newtype);
3528 push_cp_library_fn (VEC_NEW_EXPR, newtype);
3529 global_delete_fndecl = push_cp_library_fn (DELETE_EXPR, deltype);
3530 push_cp_library_fn (VEC_DELETE_EXPR, deltype);
3532 nullptr_type_node = make_node (LANG_TYPE);
3533 TYPE_SIZE (nullptr_type_node) = bitsize_int (GET_MODE_BITSIZE (ptr_mode));
3534 TYPE_SIZE_UNIT (nullptr_type_node) = size_int (GET_MODE_SIZE (ptr_mode));
3535 TYPE_UNSIGNED (nullptr_type_node) = 1;
3536 TYPE_PRECISION (nullptr_type_node) = GET_MODE_BITSIZE (ptr_mode);
3537 SET_TYPE_MODE (nullptr_type_node, Pmode);
3538 record_builtin_type (RID_MAX, "decltype(nullptr)", nullptr_type_node);
3539 nullptr_node = make_node (INTEGER_CST);
3540 TREE_TYPE (nullptr_node) = nullptr_type_node;
3544 = build_library_fn_ptr ("__cxa_pure_virtual", void_ftype);
3546 /* Perform other language dependent initializations. */
3547 init_class_processing ();
3548 init_rtti_processing ();
3549 init_template_processing ();
3551 if (flag_exceptions)
3552 init_exception_processing ();
3554 if (! supports_one_only ())
3557 make_fname_decl = cp_make_fname_decl;
3558 start_fname_decls ();
3560 /* Show we use EH for cleanups. */
3561 if (flag_exceptions)
3562 using_eh_for_cleanups ();
3565 /* Generate an initializer for a function naming variable from
3566 NAME. NAME may be NULL, to indicate a dependent name. TYPE_P is
3567 filled in with the type of the init. */
3570 cp_fname_init (const char* name, tree *type_p)
3572 tree domain = NULL_TREE;
3574 tree init = NULL_TREE;
3579 length = strlen (name);
3580 domain = build_index_type (size_int (length));
3581 init = build_string (length + 1, name);
3584 type = cp_build_qualified_type (char_type_node, TYPE_QUAL_CONST);
3585 type = build_cplus_array_type (type, domain);
3590 TREE_TYPE (init) = type;
3592 init = error_mark_node;
3597 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give
3598 the decl, LOC is the location to give the decl, NAME is the
3599 initialization string and TYPE_DEP indicates whether NAME depended
3600 on the type of the function. We make use of that to detect
3601 __PRETTY_FUNCTION__ inside a template fn. This is being done lazily
3602 at the point of first use, so we mustn't push the decl now. */
3605 cp_make_fname_decl (location_t loc, tree id, int type_dep)
3607 const char *const name = (type_dep && processing_template_decl
3608 ? NULL : fname_as_string (type_dep));
3610 tree init = cp_fname_init (name, &type);
3611 tree decl = build_decl (loc, VAR_DECL, id, type);
3614 free (CONST_CAST (char *, name));
3616 /* As we're using pushdecl_with_scope, we must set the context. */
3617 DECL_CONTEXT (decl) = current_function_decl;
3618 DECL_PRETTY_FUNCTION_P (decl) = type_dep;
3620 TREE_STATIC (decl) = 1;
3621 TREE_READONLY (decl) = 1;
3622 DECL_ARTIFICIAL (decl) = 1;
3624 TREE_USED (decl) = 1;
3626 if (current_function_decl)
3628 struct cp_binding_level *b = current_binding_level;
3629 while (b->level_chain->kind != sk_function_parms)
3631 pushdecl_with_scope (decl, b, /*is_friend=*/false);
3632 cp_finish_decl (decl, init, /*init_const_expr_p=*/false, NULL_TREE,
3633 LOOKUP_ONLYCONVERTING);
3636 pushdecl_top_level_and_finish (decl, init);
3642 builtin_function_1 (tree decl, tree context, bool is_global)
3644 tree id = DECL_NAME (decl);
3645 const char *name = IDENTIFIER_POINTER (id);
3647 retrofit_lang_decl (decl);
3649 DECL_ARTIFICIAL (decl) = 1;
3650 SET_OVERLOADED_OPERATOR_CODE (decl, ERROR_MARK);
3651 SET_DECL_LANGUAGE (decl, lang_c);
3652 /* Runtime library routines are, by definition, available in an
3653 external shared object. */
3654 DECL_VISIBILITY (decl) = VISIBILITY_DEFAULT;
3655 DECL_VISIBILITY_SPECIFIED (decl) = 1;
3657 DECL_CONTEXT (decl) = context;
3660 pushdecl_top_level (decl);
3664 /* A function in the user's namespace should have an explicit
3665 declaration before it is used. Mark the built-in function as
3666 anticipated but not actually declared. */
3667 if (name[0] != '_' || name[1] != '_')
3668 DECL_ANTICIPATED (decl) = 1;
3669 else if (strncmp (name + 2, "builtin_", strlen ("builtin_")) != 0)
3671 size_t len = strlen (name);
3673 /* Treat __*_chk fortification functions as anticipated as well,
3674 unless they are __builtin_*. */
3675 if (len > strlen ("___chk")
3676 && memcmp (name + len - strlen ("_chk"),
3677 "_chk", strlen ("_chk") + 1) == 0)
3678 DECL_ANTICIPATED (decl) = 1;
3685 cxx_builtin_function (tree decl)
3687 tree id = DECL_NAME (decl);
3688 const char *name = IDENTIFIER_POINTER (id);
3689 /* All builtins that don't begin with an '_' should additionally
3690 go in the 'std' namespace. */
3693 tree decl2 = copy_node(decl);
3694 push_namespace (std_identifier);
3695 builtin_function_1 (decl2, std_node, false);
3699 return builtin_function_1 (decl, NULL_TREE, false);
3702 /* Like cxx_builtin_function, but guarantee the function is added to the global
3703 scope. This is to allow function specific options to add new machine
3704 dependent builtins when the target ISA changes via attribute((target(...)))
3705 which saves space on program startup if the program does not use non-generic
3709 cxx_builtin_function_ext_scope (tree decl)
3712 tree id = DECL_NAME (decl);
3713 const char *name = IDENTIFIER_POINTER (id);
3714 /* All builtins that don't begin with an '_' should additionally
3715 go in the 'std' namespace. */
3718 tree decl2 = copy_node(decl);
3719 push_namespace (std_identifier);
3720 builtin_function_1 (decl2, std_node, true);
3724 return builtin_function_1 (decl, NULL_TREE, true);
3727 /* Generate a FUNCTION_DECL with the typical flags for a runtime library
3728 function. Not called directly. */
3731 build_library_fn_1 (tree name, enum tree_code operator_code, tree type)
3733 tree fn = build_lang_decl (FUNCTION_DECL, name, type);
3734 DECL_EXTERNAL (fn) = 1;
3735 TREE_PUBLIC (fn) = 1;
3736 DECL_ARTIFICIAL (fn) = 1;
3737 SET_OVERLOADED_OPERATOR_CODE (fn, operator_code);
3738 SET_DECL_LANGUAGE (fn, lang_c);
3739 /* Runtime library routines are, by definition, available in an
3740 external shared object. */
3741 DECL_VISIBILITY (fn) = VISIBILITY_DEFAULT;
3742 DECL_VISIBILITY_SPECIFIED (fn) = 1;
3746 /* Returns the _DECL for a library function with C linkage.
3747 We assume that such functions never throw; if this is incorrect,
3748 callers should unset TREE_NOTHROW. */
3751 build_library_fn (tree name, tree type)
3753 tree fn = build_library_fn_1 (name, ERROR_MARK, type);
3754 TREE_NOTHROW (fn) = 1;
3758 /* Returns the _DECL for a library function with C++ linkage. */
3761 build_cp_library_fn (tree name, enum tree_code operator_code, tree type)
3763 tree fn = build_library_fn_1 (name, operator_code, type);
3764 TREE_NOTHROW (fn) = TYPE_NOTHROW_P (type);
3765 DECL_CONTEXT (fn) = FROB_CONTEXT (current_namespace);
3766 SET_DECL_LANGUAGE (fn, lang_cplusplus);
3770 /* Like build_library_fn, but takes a C string instead of an
3774 build_library_fn_ptr (const char* name, tree type)
3776 return build_library_fn (get_identifier (name), type);
3779 /* Like build_cp_library_fn, but takes a C string instead of an
3783 build_cp_library_fn_ptr (const char* name, tree type)
3785 return build_cp_library_fn (get_identifier (name), ERROR_MARK, type);
3788 /* Like build_library_fn, but also pushes the function so that we will
3789 be able to find it via IDENTIFIER_GLOBAL_VALUE. Also, the function
3790 may throw exceptions listed in RAISES. */
3793 push_library_fn (tree name, tree type, tree raises)
3798 type = build_exception_variant (type, raises);
3800 fn = build_library_fn (name, type);
3801 pushdecl_top_level (fn);
3805 /* Like build_cp_library_fn, but also pushes the function so that it
3806 will be found by normal lookup. */
3809 push_cp_library_fn (enum tree_code operator_code, tree type)
3811 tree fn = build_cp_library_fn (ansi_opname (operator_code),
3818 /* Like push_library_fn, but takes a TREE_LIST of parm types rather than
3822 push_void_library_fn (tree name, tree parmtypes)
3824 tree type = build_function_type (void_type_node, parmtypes);
3825 return push_library_fn (name, type, NULL_TREE);
3828 /* Like push_library_fn, but also note that this function throws
3829 and does not return. Used for __throw_foo and the like. */
3832 push_throw_library_fn (tree name, tree type)
3834 tree fn = push_library_fn (name, type, NULL_TREE);
3835 TREE_THIS_VOLATILE (fn) = 1;
3836 TREE_NOTHROW (fn) = 0;
3840 /* When we call finish_struct for an anonymous union, we create
3841 default copy constructors and such. But, an anonymous union
3842 shouldn't have such things; this function undoes the damage to the
3843 anonymous union type T.
3845 (The reason that we create the synthesized methods is that we don't
3846 distinguish `union { int i; }' from `typedef union { int i; } U'.
3847 The first is an anonymous union; the second is just an ordinary
3851 fixup_anonymous_aggr (tree t)
3855 /* Wipe out memory of synthesized methods. */
3856 TYPE_HAS_USER_CONSTRUCTOR (t) = 0;
3857 TYPE_HAS_DEFAULT_CONSTRUCTOR (t) = 0;
3858 TYPE_HAS_INIT_REF (t) = 0;
3859 TYPE_HAS_CONST_INIT_REF (t) = 0;
3860 TYPE_HAS_ASSIGN_REF (t) = 0;
3861 TYPE_HAS_CONST_ASSIGN_REF (t) = 0;
3863 /* Splice the implicitly generated functions out of the TYPE_METHODS
3865 q = &TYPE_METHODS (t);
3868 if (DECL_ARTIFICIAL (*q))
3869 *q = TREE_CHAIN (*q);
3871 q = &TREE_CHAIN (*q);
3874 /* ISO C++ 9.5.3. Anonymous unions may not have function members. */
3875 if (TYPE_METHODS (t))
3877 tree decl = TYPE_MAIN_DECL (t);
3879 if (TREE_CODE (t) != UNION_TYPE)
3880 error_at (DECL_SOURCE_LOCATION (decl),
3881 "an anonymous struct cannot have function members");
3883 error_at (DECL_SOURCE_LOCATION (decl),
3884 "an anonymous union cannot have function members");
3887 /* Anonymous aggregates cannot have fields with ctors, dtors or complex
3888 assignment operators (because they cannot have these methods themselves).
3889 For anonymous unions this is already checked because they are not allowed
3890 in any union, otherwise we have to check it. */
3891 if (TREE_CODE (t) != UNION_TYPE)
3895 for (field = TYPE_FIELDS (t); field; field = TREE_CHAIN (field))
3896 if (TREE_CODE (field) == FIELD_DECL)
3898 type = TREE_TYPE (field);
3899 if (CLASS_TYPE_P (type))
3901 if (TYPE_NEEDS_CONSTRUCTING (type))
3902 error ("member %q+#D with constructor not allowed "
3903 "in anonymous aggregate", field);
3904 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
3905 error ("member %q+#D with destructor not allowed "
3906 "in anonymous aggregate", field);
3907 if (TYPE_HAS_COMPLEX_ASSIGN_REF (type))
3908 error ("member %q+#D with copy assignment operator "
3909 "not allowed in anonymous aggregate", field);
3915 /* Make sure that a declaration with no declarator is well-formed, i.e.
3916 just declares a tagged type or anonymous union.
3918 Returns the type declared; or NULL_TREE if none. */
3921 check_tag_decl (cp_decl_specifier_seq *declspecs)
3923 int saw_friend = declspecs->specs[(int)ds_friend] != 0;
3924 int saw_typedef = declspecs->specs[(int)ds_typedef] != 0;
3925 /* If a class, struct, or enum type is declared by the DECLSPECS
3926 (i.e, if a class-specifier, enum-specifier, or non-typename
3927 elaborated-type-specifier appears in the DECLSPECS),
3928 DECLARED_TYPE is set to the corresponding type. */
3929 tree declared_type = NULL_TREE;
3930 bool error_p = false;
3932 if (declspecs->multiple_types_p)
3933 error ("multiple types in one declaration");
3934 else if (declspecs->redefined_builtin_type)
3936 if (!in_system_header)
3937 permerror (input_location, "redeclaration of C++ built-in type %qT",
3938 declspecs->redefined_builtin_type);
3943 && TYPE_P (declspecs->type)
3944 && ((TREE_CODE (declspecs->type) != TYPENAME_TYPE
3945 && MAYBE_CLASS_TYPE_P (declspecs->type))
3946 || TREE_CODE (declspecs->type) == ENUMERAL_TYPE))
3947 declared_type = declspecs->type;
3948 else if (declspecs->type == error_mark_node)
3950 if (declared_type == NULL_TREE && ! saw_friend && !error_p)
3951 permerror (input_location, "declaration does not declare anything");
3952 /* Check for an anonymous union. */
3953 else if (declared_type && RECORD_OR_UNION_CODE_P (TREE_CODE (declared_type))
3954 && TYPE_ANONYMOUS_P (declared_type))
3956 /* 7/3 In a simple-declaration, the optional init-declarator-list
3957 can be omitted only when declaring a class (clause 9) or
3958 enumeration (7.2), that is, when the decl-specifier-seq contains
3959 either a class-specifier, an elaborated-type-specifier with
3960 a class-key (9.1), or an enum-specifier. In these cases and
3961 whenever a class-specifier or enum-specifier is present in the
3962 decl-specifier-seq, the identifiers in these specifiers are among
3963 the names being declared by the declaration (as class-name,
3964 enum-names, or enumerators, depending on the syntax). In such
3965 cases, and except for the declaration of an unnamed bit-field (9.6),
3966 the decl-specifier-seq shall introduce one or more names into the
3967 program, or shall redeclare a name introduced by a previous
3968 declaration. [Example:
3969 enum { }; // ill-formed
3970 typedef class { }; // ill-formed
3974 error ("missing type-name in typedef-declaration");
3977 /* Anonymous unions are objects, so they can have specifiers. */;
3978 SET_ANON_AGGR_TYPE_P (declared_type);
3980 if (TREE_CODE (declared_type) != UNION_TYPE && !in_system_header)
3981 pedwarn (input_location, OPT_pedantic, "ISO C++ prohibits anonymous structs");
3986 if (declspecs->specs[(int)ds_inline]
3987 || declspecs->specs[(int)ds_virtual])
3988 error ("%qs can only be specified for functions",
3989 declspecs->specs[(int)ds_inline]
3990 ? "inline" : "virtual");
3992 && (!current_class_type
3993 || current_scope () != current_class_type))
3994 error ("%<friend%> can only be specified inside a class");
3995 else if (declspecs->specs[(int)ds_explicit])
3996 error ("%<explicit%> can only be specified for constructors");
3997 else if (declspecs->storage_class)
3998 error ("a storage class can only be specified for objects "
4000 else if (declspecs->specs[(int)ds_const]
4001 || declspecs->specs[(int)ds_volatile]
4002 || declspecs->specs[(int)ds_restrict]
4003 || declspecs->specs[(int)ds_thread])
4004 error ("qualifiers can only be specified for objects "
4006 else if (saw_typedef)
4007 warning (0, "%<typedef%> was ignored in this declaration");
4008 else if (declspecs->specs[(int) ds_constexpr])
4009 error ("%<constexpr> cannot be used for type declarations");
4012 return declared_type;
4015 /* Called when a declaration is seen that contains no names to declare.
4016 If its type is a reference to a structure, union or enum inherited
4017 from a containing scope, shadow that tag name for the current scope
4018 with a forward reference.
4019 If its type defines a new named structure or union
4020 or defines an enum, it is valid but we need not do anything here.
4021 Otherwise, it is an error.
4023 C++: may have to grok the declspecs to learn about static,
4024 complain for anonymous unions.
4026 Returns the TYPE declared -- or NULL_TREE if none. */
4029 shadow_tag (cp_decl_specifier_seq *declspecs)
4031 tree t = check_tag_decl (declspecs);
4036 if (declspecs->attributes)
4038 warning (0, "attribute ignored in declaration of %q+#T", t);
4039 warning (0, "attribute for %q+#T must follow the %qs keyword",
4040 t, class_key_or_enum_as_string (t));
4044 if (maybe_process_partial_specialization (t) == error_mark_node)
4047 /* This is where the variables in an anonymous union are
4048 declared. An anonymous union declaration looks like:
4050 because there is no declarator after the union, the parser
4051 sends that declaration here. */
4052 if (ANON_AGGR_TYPE_P (t))
4054 fixup_anonymous_aggr (t);
4056 if (TYPE_FIELDS (t))
4058 tree decl = grokdeclarator (/*declarator=*/NULL,
4059 declspecs, NORMAL, 0, NULL);
4060 finish_anon_union (decl);
4067 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
4070 groktypename (cp_decl_specifier_seq *type_specifiers,
4071 const cp_declarator *declarator,
4072 bool is_template_arg)
4076 enum decl_context context
4077 = is_template_arg ? TEMPLATE_TYPE_ARG : TYPENAME;
4078 attrs = type_specifiers->attributes;
4079 type_specifiers->attributes = NULL_TREE;
4080 type = grokdeclarator (declarator, type_specifiers, context, 0, &attrs);
4081 if (attrs && type != error_mark_node)
4083 if (CLASS_TYPE_P (type))
4084 warning (OPT_Wattributes, "ignoring attributes applied to class type %qT "
4085 "outside of definition", type);
4086 else if (MAYBE_CLASS_TYPE_P (type))
4087 /* A template type parameter or other dependent type. */
4088 warning (OPT_Wattributes, "ignoring attributes applied to dependent "
4089 "type %qT without an associated declaration", type);
4091 cplus_decl_attributes (&type, attrs, 0);
4096 /* Process a DECLARATOR for a function-scope variable declaration,
4097 namespace-scope variable declaration, or function declaration.
4098 (Function definitions go through start_function; class member
4099 declarations appearing in the body of the class go through
4100 grokfield.) The DECL corresponding to the DECLARATOR is returned.
4101 If an error occurs, the error_mark_node is returned instead.
4103 DECLSPECS are the decl-specifiers for the declaration. INITIALIZED is
4104 SD_INITIALIZED if an explicit initializer is present, or SD_DEFAULTED
4105 for an explicitly defaulted function, or SD_DELETED for an explicitly
4106 deleted function, but 0 (SD_UNINITIALIZED) if this is a variable
4107 implicitly initialized via a default constructor. ATTRIBUTES and
4108 PREFIX_ATTRIBUTES are GNU attributes associated with this declaration.
4109 *PUSHED_SCOPE_P is set to the scope entered in this function, if any; if
4110 set, the caller is responsible for calling pop_scope. */
4113 start_decl (const cp_declarator *declarator,
4114 cp_decl_specifier_seq *declspecs,
4117 tree prefix_attributes,
4118 tree *pushed_scope_p)
4125 *pushed_scope_p = NULL_TREE;
4127 /* An object declared as __attribute__((deprecated)) suppresses
4128 warnings of uses of other deprecated items. */
4129 if (lookup_attribute ("deprecated", attributes))
4130 deprecated_state = DEPRECATED_SUPPRESS;
4132 attributes = chainon (attributes, prefix_attributes);
4134 decl = grokdeclarator (declarator, declspecs, NORMAL, initialized,
4137 deprecated_state = DEPRECATED_NORMAL;
4139 if (decl == NULL_TREE || TREE_CODE (decl) == VOID_TYPE
4140 || decl == error_mark_node)
4141 return error_mark_node;
4143 context = DECL_CONTEXT (decl);
4147 *pushed_scope_p = push_scope (context);
4149 /* We are only interested in class contexts, later. */
4150 if (TREE_CODE (context) == NAMESPACE_DECL)
4151 context = NULL_TREE;
4155 /* Is it valid for this decl to have an initializer at all?
4156 If not, set INITIALIZED to zero, which will indirectly
4157 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
4158 switch (TREE_CODE (decl))
4161 error ("typedef %qD is initialized (use decltype instead)", decl);
4162 return error_mark_node;
4165 if (initialized == SD_DELETED)
4166 /* We'll handle the rest of the semantics later, but we need to
4167 set this now so it's visible to duplicate_decls. */
4168 DECL_DELETED_FN (decl) = 1;
4177 if (! toplevel_bindings_p ()
4178 && DECL_EXTERNAL (decl))
4179 warning (0, "declaration of %q#D has %<extern%> and is initialized",
4181 DECL_EXTERNAL (decl) = 0;
4182 if (toplevel_bindings_p ())
4183 TREE_STATIC (decl) = 1;
4186 /* If this is a typedef that names the class for linkage purposes
4187 (7.1.3p8), apply any attributes directly to the type. */
4188 if (TREE_CODE (decl) == TYPE_DECL
4189 && TAGGED_TYPE_P (TREE_TYPE (decl))
4190 && decl == TYPE_NAME (TYPE_MAIN_VARIANT (TREE_TYPE (decl))))
4191 flags = ATTR_FLAG_TYPE_IN_PLACE;
4195 /* Set attributes here so if duplicate decl, will have proper attributes. */
4196 cplus_decl_attributes (&decl, attributes, flags);
4198 /* Dllimported symbols cannot be defined. Static data members (which
4199 can be initialized in-class and dllimported) go through grokfield,
4200 not here, so we don't need to exclude those decls when checking for
4202 if (initialized && DECL_DLLIMPORT_P (decl))
4204 error ("definition of %q#D is marked %<dllimport%>", decl);
4205 DECL_DLLIMPORT_P (decl) = 0;
4208 /* If #pragma weak was used, mark the decl weak now. */
4209 maybe_apply_pragma_weak (decl);
4211 if (TREE_CODE (decl) == FUNCTION_DECL
4212 && DECL_DECLARED_INLINE_P (decl)
4213 && DECL_UNINLINABLE (decl)
4214 && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl)))
4215 warning (0, "inline function %q+D given attribute noinline", decl);
4217 if (context && COMPLETE_TYPE_P (complete_type (context)))
4219 if (TREE_CODE (decl) == VAR_DECL)
4221 tree field = lookup_field (context, DECL_NAME (decl), 0, false);
4222 if (field == NULL_TREE || TREE_CODE (field) != VAR_DECL)
4223 error ("%q#D is not a static member of %q#T", decl, context);
4226 if (DECL_CONTEXT (field) != context)
4228 if (!same_type_p (DECL_CONTEXT (field), context))
4229 permerror (input_location, "ISO C++ does not permit %<%T::%D%> "
4230 "to be defined as %<%T::%D%>",
4231 DECL_CONTEXT (field), DECL_NAME (decl),
4232 context, DECL_NAME (decl));
4233 DECL_CONTEXT (decl) = DECL_CONTEXT (field);
4235 if (processing_specialization
4236 && template_class_depth (context) == 0
4237 && CLASSTYPE_TEMPLATE_SPECIALIZATION (context))
4238 error ("template header not allowed in member definition "
4239 "of explicitly specialized class");
4240 /* Static data member are tricky; an in-class initialization
4241 still doesn't provide a definition, so the in-class
4242 declaration will have DECL_EXTERNAL set, but will have an
4243 initialization. Thus, duplicate_decls won't warn
4244 about this situation, and so we check here. */
4245 if (initialized && DECL_INITIALIZED_IN_CLASS_P (field))
4246 error ("duplicate initialization of %qD", decl);
4247 if (duplicate_decls (decl, field, /*newdecl_is_friend=*/false))
4249 if (declspecs->specs[(int) ds_constexpr]
4250 && !DECL_DECLARED_CONSTEXPR_P (field))
4251 error ("%qD declared %<constexpr%> outside its class", field);
4256 tree field = check_classfn (context, decl,
4257 (processing_template_decl
4258 > template_class_depth (context))
4259 ? current_template_parms
4261 if (field && field != error_mark_node
4262 && duplicate_decls (decl, field,
4263 /*newdecl_is_friend=*/false))
4267 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
4268 DECL_IN_AGGR_P (decl) = 0;
4269 /* Do not mark DECL as an explicit specialization if it was not
4270 already marked as an instantiation; a declaration should
4271 never be marked as a specialization unless we know what
4272 template is being specialized. */
4273 if (DECL_LANG_SPECIFIC (decl) && DECL_USE_TEMPLATE (decl))
4275 SET_DECL_TEMPLATE_SPECIALIZATION (decl);
4277 /* [temp.expl.spec] An explicit specialization of a static data
4278 member of a template is a definition if the declaration
4279 includes an initializer; otherwise, it is a declaration.
4281 We check for processing_specialization so this only applies
4282 to the new specialization syntax. */
4283 if (!initialized && processing_specialization)
4284 DECL_EXTERNAL (decl) = 1;
4287 if (DECL_EXTERNAL (decl) && ! DECL_TEMPLATE_SPECIALIZATION (decl))
4288 permerror (input_location, "declaration of %q#D outside of class is not definition",
4291 if (!ensure_literal_type_for_constexpr_object (decl))
4292 return error_mark_node;
4295 was_public = TREE_PUBLIC (decl);
4297 /* Enter this declaration into the symbol table. */
4298 decl = maybe_push_decl (decl);
4300 if (processing_template_decl)
4301 decl = push_template_decl (decl);
4302 if (decl == error_mark_node)
4303 return error_mark_node;
4305 /* Tell the back end to use or not use .common as appropriate. If we say
4306 -fconserve-space, we want this to save .data space, at the expense of
4307 wrong semantics. If we say -fno-conserve-space, we want this to
4308 produce errors about redefs; to do this we force variables into the
4310 if (flag_conserve_space
4311 && TREE_CODE (decl) == VAR_DECL
4312 && TREE_PUBLIC (decl)
4313 && !DECL_THREAD_LOCAL_P (decl)
4314 && !have_global_bss_p ())
4315 DECL_COMMON (decl) = 1;
4317 if (TREE_CODE (decl) == VAR_DECL
4318 && DECL_NAMESPACE_SCOPE_P (decl) && !TREE_PUBLIC (decl) && !was_public
4319 && !DECL_THIS_STATIC (decl) && !DECL_ARTIFICIAL (decl))
4321 /* This is a const variable with implicit 'static'. Set
4322 DECL_THIS_STATIC so we can tell it from variables that are
4323 !TREE_PUBLIC because of the anonymous namespace. */
4324 gcc_assert (CP_TYPE_CONST_P (TREE_TYPE (decl)));
4325 DECL_THIS_STATIC (decl) = 1;
4328 if (!processing_template_decl && TREE_CODE (decl) == VAR_DECL)
4329 start_decl_1 (decl, initialized);
4334 /* Process the declaration of a variable DECL. INITIALIZED is true
4335 iff DECL is explicitly initialized. (INITIALIZED is false if the
4336 variable is initialized via an implicitly-called constructor.)
4337 This function must be called for ordinary variables (including, for
4338 example, implicit instantiations of templates), but must not be
4339 called for template declarations. */
4342 start_decl_1 (tree decl, bool initialized)
4346 bool aggregate_definition_p;
4348 gcc_assert (!processing_template_decl);
4350 if (error_operand_p (decl))
4353 gcc_assert (TREE_CODE (decl) == VAR_DECL);
4355 type = TREE_TYPE (decl);
4356 complete_p = COMPLETE_TYPE_P (type);
4357 aggregate_definition_p = MAYBE_CLASS_TYPE_P (type) && !DECL_EXTERNAL (decl);
4359 /* If an explicit initializer is present, or if this is a definition
4360 of an aggregate, then we need a complete type at this point.
4361 (Scalars are always complete types, so there is nothing to
4362 check.) This code just sets COMPLETE_P; errors (if necessary)
4363 are issued below. */
4364 if ((initialized || aggregate_definition_p)
4366 && COMPLETE_TYPE_P (complete_type (type)))
4369 /* We will not yet have set TREE_READONLY on DECL if the type
4370 was "const", but incomplete, before this point. But, now, we
4371 have a complete type, so we can try again. */
4372 cp_apply_type_quals_to_decl (cp_type_quals (type), decl);
4376 /* Is it valid for this decl to have an initializer at all? */
4378 /* Don't allow initializations for incomplete types except for
4379 arrays which might be completed by the initialization. */
4381 ; /* A complete type is ok. */
4382 else if (type_uses_auto (type))
4383 ; /* An auto type is ok. */
4384 else if (TREE_CODE (type) != ARRAY_TYPE)
4386 error ("variable %q#D has initializer but incomplete type", decl);
4387 type = TREE_TYPE (decl) = error_mark_node;
4389 else if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (type))))
4391 if (DECL_LANG_SPECIFIC (decl) && DECL_TEMPLATE_INFO (decl))
4392 error ("elements of array %q#D have incomplete type", decl);
4393 /* else we already gave an error in start_decl. */
4396 else if (aggregate_definition_p && !complete_p)
4398 if (type_uses_auto (type))
4399 error ("declaration of %q#D has no initializer", decl);
4401 error ("aggregate %q#D has incomplete type and cannot be defined",
4403 /* Change the type so that assemble_variable will give
4404 DECL an rtl we can live with: (mem (const_int 0)). */
4405 type = TREE_TYPE (decl) = error_mark_node;
4408 /* Create a new scope to hold this declaration if necessary.
4409 Whether or not a new scope is necessary cannot be determined
4410 until after the type has been completed; if the type is a
4411 specialization of a class template it is not until after
4412 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
4413 will be set correctly. */
4414 maybe_push_cleanup_level (type);
4417 /* Handle initialization of references. DECL, TYPE, and INIT have the
4418 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
4419 but will be set to a new CLEANUP_STMT if a temporary is created
4420 that must be destroyed subsequently.
4422 Returns an initializer expression to use to initialize DECL, or
4423 NULL if the initialization can be performed statically.
4425 Quotes on semantics can be found in ARM 8.4.3. */
4428 grok_reference_init (tree decl, tree type, tree init, tree *cleanup)
4432 if (init == NULL_TREE)
4434 if ((DECL_LANG_SPECIFIC (decl) == 0
4435 || DECL_IN_AGGR_P (decl) == 0)
4436 && ! DECL_THIS_EXTERN (decl))
4437 error ("%qD declared as reference but not initialized", decl);
4441 if (TREE_CODE (init) == TREE_LIST)
4442 init = build_x_compound_expr_from_list (init, "initializer");
4444 if (TREE_CODE (TREE_TYPE (type)) != ARRAY_TYPE
4445 && TREE_CODE (TREE_TYPE (init)) == ARRAY_TYPE)
4446 /* Note: default conversion is only called in very special cases. */
4447 init = decay_conversion (init);
4449 /* Convert INIT to the reference type TYPE. This may involve the
4450 creation of a temporary, whose lifetime must be the same as that
4451 of the reference. If so, a DECL_EXPR for the temporary will be
4452 added just after the DECL_EXPR for DECL. That's why we don't set
4453 DECL_INITIAL for local references (instead assigning to them
4454 explicitly); we need to allow the temporary to be initialized
4456 tmp = initialize_reference (type, init, decl, cleanup, tf_warning_or_error);
4458 if (tmp == error_mark_node)
4460 else if (tmp == NULL_TREE)
4462 error ("cannot initialize %qT from %qT", type, TREE_TYPE (init));
4466 if (TREE_STATIC (decl) && !TREE_CONSTANT (tmp))
4469 DECL_INITIAL (decl) = tmp;
4474 /* Subroutine of check_initializer. We're initializing a DECL of
4475 std::initializer_list<T> TYPE from a braced-init-list INIT, and need to
4476 extend the lifetime of the underlying array to match that of the decl,
4477 just like for reference initialization. CLEANUP is as for
4478 grok_reference_init. */
4481 build_init_list_var_init (tree decl, tree type, tree init, tree *cleanup)
4483 tree aggr_init, array, arrtype;
4484 init = perform_implicit_conversion (type, init, tf_warning_or_error);
4485 if (error_operand_p (init))
4486 return error_mark_node;
4488 aggr_init = TARGET_EXPR_INITIAL (init);
4489 init = build2 (INIT_EXPR, type, decl, init);
4491 array = AGGR_INIT_EXPR_ARG (aggr_init, 1);
4492 arrtype = TREE_TYPE (array);
4494 gcc_assert (TREE_CODE (array) == ADDR_EXPR);
4495 array = TREE_OPERAND (array, 0);
4496 /* If the array is constant, finish_compound_literal already made it a
4497 static variable and we don't need to do anything here. */
4498 if (decl && TREE_CODE (array) == TARGET_EXPR)
4501 tree var = set_up_extended_ref_temp (decl, array, cleanup, &subinit);
4502 var = build_address (var);
4503 var = convert (arrtype, var);
4504 AGGR_INIT_EXPR_ARG (aggr_init, 1) = var;
4505 init = build2 (COMPOUND_EXPR, TREE_TYPE (init), subinit, init);
4510 /* Designated initializers in arrays are not supported in GNU C++.
4511 The parser cannot detect this error since it does not know whether
4512 a given brace-enclosed initializer is for a class type or for an
4513 array. This function checks that CE does not use a designated
4514 initializer. If it does, an error is issued. Returns true if CE
4515 is valid, i.e., does not have a designated initializer. */
4518 check_array_designated_initializer (const constructor_elt *ce)
4520 /* Designated initializers for array elements are not supported. */
4523 /* The parser only allows identifiers as designated
4525 if (ce->index == error_mark_node)
4526 error ("name used in a GNU-style designated "
4527 "initializer for an array");
4530 gcc_assert (TREE_CODE (ce->index) == IDENTIFIER_NODE);
4531 error ("name %qD used in a GNU-style designated "
4532 "initializer for an array", ce->index);
4540 /* When parsing `int a[] = {1, 2};' we don't know the size of the
4541 array until we finish parsing the initializer. If that's the
4542 situation we're in, update DECL accordingly. */
4545 maybe_deduce_size_from_array_init (tree decl, tree init)
4547 tree type = TREE_TYPE (decl);
4549 if (TREE_CODE (type) == ARRAY_TYPE
4550 && TYPE_DOMAIN (type) == NULL_TREE
4551 && TREE_CODE (decl) != TYPE_DECL)
4553 /* do_default is really a C-ism to deal with tentative definitions.
4554 But let's leave it here to ease the eventual merge. */
4555 int do_default = !DECL_EXTERNAL (decl);
4556 tree initializer = init ? init : DECL_INITIAL (decl);
4559 /* Check that there are no designated initializers in INIT, as
4560 those are not supported in GNU C++, and as the middle-end
4561 will crash if presented with a non-numeric designated
4563 if (initializer && TREE_CODE (initializer) == CONSTRUCTOR)
4565 VEC(constructor_elt,gc) *v = CONSTRUCTOR_ELTS (initializer);
4566 constructor_elt *ce;
4569 VEC_iterate (constructor_elt, v, i, ce);
4571 if (!check_array_designated_initializer (ce))
4577 failure = cp_complete_array_type (&TREE_TYPE (decl), initializer,
4581 error ("initializer fails to determine size of %qD", decl);
4582 TREE_TYPE (decl) = error_mark_node;
4584 else if (failure == 2)
4588 error ("array size missing in %qD", decl);
4589 TREE_TYPE (decl) = error_mark_node;
4591 /* If a `static' var's size isn't known, make it extern as
4592 well as static, so it does not get allocated. If it's not
4593 `static', then don't mark it extern; finish_incomplete_decl
4594 will give it a default size and it will get allocated. */
4595 else if (!pedantic && TREE_STATIC (decl) && !TREE_PUBLIC (decl))
4596 DECL_EXTERNAL (decl) = 1;
4598 else if (failure == 3)
4600 error ("zero-size array %qD", decl);
4601 TREE_TYPE (decl) = error_mark_node;
4605 cp_apply_type_quals_to_decl (cp_type_quals (TREE_TYPE (decl)), decl);
4607 relayout_decl (decl);
4611 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
4612 any appropriate error messages regarding the layout. */
4615 layout_var_decl (tree decl)
4619 type = TREE_TYPE (decl);
4620 if (type == error_mark_node)
4623 /* If we haven't already layed out this declaration, do so now.
4624 Note that we must not call complete type for an external object
4625 because it's type might involve templates that we are not
4626 supposed to instantiate yet. (And it's perfectly valid to say
4627 `extern X x' for some incomplete type `X'.) */
4628 if (!DECL_EXTERNAL (decl))
4629 complete_type (type);
4630 if (!DECL_SIZE (decl)
4631 && TREE_TYPE (decl) != error_mark_node
4632 && (COMPLETE_TYPE_P (type)
4633 || (TREE_CODE (type) == ARRAY_TYPE
4634 && !TYPE_DOMAIN (type)
4635 && COMPLETE_TYPE_P (TREE_TYPE (type)))))
4636 layout_decl (decl, 0);
4638 if (!DECL_EXTERNAL (decl) && DECL_SIZE (decl) == NULL_TREE)
4640 /* An automatic variable with an incomplete type: that is an error.
4641 Don't talk about array types here, since we took care of that
4642 message in grokdeclarator. */
4643 error ("storage size of %qD isn't known", decl);
4644 TREE_TYPE (decl) = error_mark_node;
4647 /* Keep this code around in case we later want to control debug info
4648 based on whether a type is "used". (jason 1999-11-11) */
4650 else if (!DECL_EXTERNAL (decl) && MAYBE_CLASS_TYPE_P (ttype))
4651 /* Let debugger know it should output info for this type. */
4652 note_debug_info_needed (ttype);
4654 if (TREE_STATIC (decl) && DECL_CLASS_SCOPE_P (decl))
4655 note_debug_info_needed (DECL_CONTEXT (decl));
4658 if ((DECL_EXTERNAL (decl) || TREE_STATIC (decl))
4659 && DECL_SIZE (decl) != NULL_TREE
4660 && ! TREE_CONSTANT (DECL_SIZE (decl)))
4662 if (TREE_CODE (DECL_SIZE (decl)) == INTEGER_CST)
4663 constant_expression_warning (DECL_SIZE (decl));
4666 error ("storage size of %qD isn't constant", decl);
4667 TREE_TYPE (decl) = error_mark_node;
4672 /* If a local static variable is declared in an inline function, or if
4673 we have a weak definition, we must endeavor to create only one
4674 instance of the variable at link-time. */
4677 maybe_commonize_var (tree decl)
4679 /* Static data in a function with comdat linkage also has comdat
4681 if (TREE_STATIC (decl)
4682 /* Don't mess with __FUNCTION__. */
4683 && ! DECL_ARTIFICIAL (decl)
4684 && DECL_FUNCTION_SCOPE_P (decl)
4685 && vague_linkage_p (DECL_CONTEXT (decl)))
4689 /* With weak symbols, we simply make the variable COMDAT;
4690 that will cause copies in multiple translations units to
4692 comdat_linkage (decl);
4696 if (DECL_INITIAL (decl) == NULL_TREE
4697 || DECL_INITIAL (decl) == error_mark_node)
4699 /* Without weak symbols, we can use COMMON to merge
4700 uninitialized variables. */
4701 TREE_PUBLIC (decl) = 1;
4702 DECL_COMMON (decl) = 1;
4706 /* While for initialized variables, we must use internal
4707 linkage -- which means that multiple copies will not
4709 TREE_PUBLIC (decl) = 0;
4710 DECL_COMMON (decl) = 0;
4711 warning_at (input_location, 0,
4712 "sorry: semantics of inline function static "
4713 "data %q+#D are wrong (you'll wind up "
4714 "with multiple copies)", decl);
4715 warning_at (DECL_SOURCE_LOCATION (decl), 0,
4716 " you can work around this by removing "
4721 else if (DECL_LANG_SPECIFIC (decl) && DECL_COMDAT (decl))
4722 /* Set it up again; we might have set DECL_INITIAL since the last
4724 comdat_linkage (decl);
4727 /* Issue an error message if DECL is an uninitialized const variable. */
4730 check_for_uninitialized_const_var (tree decl)
4732 tree type = strip_array_types (TREE_TYPE (decl));
4734 if (TREE_CODE (decl) == VAR_DECL && DECL_DECLARED_CONSTEXPR_P (decl)
4735 && DECL_INITIAL (decl) == NULL)
4736 error ("missing initializer for constexpr %qD", decl);
4738 /* ``Unless explicitly declared extern, a const object does not have
4739 external linkage and must be initialized. ($8.4; $12.1)'' ARM
4741 else if (TREE_CODE (decl) == VAR_DECL
4742 && TREE_CODE (type) != REFERENCE_TYPE
4743 && CP_TYPE_CONST_P (type)
4744 && (!TYPE_NEEDS_CONSTRUCTING (type)
4745 || !type_has_user_provided_default_constructor (type))
4746 && !DECL_INITIAL (decl))
4748 permerror (DECL_SOURCE_LOCATION (decl),
4749 "uninitialized const %qD", decl);
4751 if (CLASS_TYPE_P (type)
4752 && !type_has_user_provided_default_constructor (type))
4754 tree defaulted_ctor;
4756 inform (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (type)),
4757 "%q#T has no user-provided default constructor", type);
4758 defaulted_ctor = in_class_defaulted_default_constructor (type);
4760 inform (DECL_SOURCE_LOCATION (defaulted_ctor),
4761 "constructor is not user-provided because it is "
4762 "explicitly defaulted in the class body");
4767 /* Structure holding the current initializer being processed by reshape_init.
4768 CUR is a pointer to the current element being processed, END is a pointer
4769 after the last element present in the initializer. */
4770 typedef struct reshape_iterator_t
4772 constructor_elt *cur;
4773 constructor_elt *end;
4776 static tree reshape_init_r (tree, reshape_iter *, bool);
4778 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
4779 returned is the next FIELD_DECL (possibly FIELD itself) that can be
4780 initialized. If there are no more such fields, the return value
4784 next_initializable_field (tree field)
4787 && (TREE_CODE (field) != FIELD_DECL
4788 || (DECL_C_BIT_FIELD (field) && !DECL_NAME (field))
4789 || DECL_ARTIFICIAL (field)))
4790 field = TREE_CHAIN (field);
4795 /* Subroutine of reshape_init_array and reshape_init_vector, which does
4796 the actual work. ELT_TYPE is the element type of the array. MAX_INDEX is an
4797 INTEGER_CST representing the size of the array minus one (the maximum index),
4798 or NULL_TREE if the array was declared without specifying the size. D is
4799 the iterator within the constructor. */
4802 reshape_init_array_1 (tree elt_type, tree max_index, reshape_iter *d)
4805 bool sized_array_p = (max_index != NULL_TREE);
4806 unsigned HOST_WIDE_INT max_index_cst = 0;
4807 unsigned HOST_WIDE_INT index;
4809 /* The initializer for an array is always a CONSTRUCTOR. */
4810 new_init = build_constructor (init_list_type_node, NULL);
4814 /* Minus 1 is used for zero sized arrays. */
4815 if (integer_all_onesp (max_index))
4818 if (host_integerp (max_index, 1))
4819 max_index_cst = tree_low_cst (max_index, 1);
4820 /* sizetype is sign extended, not zero extended. */
4822 max_index_cst = tree_low_cst (fold_convert (size_type_node, max_index),
4826 /* Loop until there are no more initializers. */
4828 d->cur != d->end && (!sized_array_p || index <= max_index_cst);
4833 check_array_designated_initializer (d->cur);
4834 elt_init = reshape_init_r (elt_type, d, /*first_initializer_p=*/false);
4835 if (elt_init == error_mark_node)
4836 return error_mark_node;
4837 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init), NULL_TREE, elt_init);
4843 /* Subroutine of reshape_init_r, processes the initializers for arrays.
4844 Parameters are the same of reshape_init_r. */
4847 reshape_init_array (tree type, reshape_iter *d)
4849 tree max_index = NULL_TREE;
4851 gcc_assert (TREE_CODE (type) == ARRAY_TYPE);
4853 if (TYPE_DOMAIN (type))
4854 max_index = array_type_nelts (type);
4856 return reshape_init_array_1 (TREE_TYPE (type), max_index, d);
4859 /* Subroutine of reshape_init_r, processes the initializers for vectors.
4860 Parameters are the same of reshape_init_r. */
4863 reshape_init_vector (tree type, reshape_iter *d)
4865 tree max_index = NULL_TREE;
4868 gcc_assert (TREE_CODE (type) == VECTOR_TYPE);
4870 if (COMPOUND_LITERAL_P (d->cur->value))
4872 tree value = d->cur->value;
4873 if (!same_type_p (TREE_TYPE (value), type))
4875 error ("invalid type %qT as initializer for a vector of type %qT",
4876 TREE_TYPE (d->cur->value), type);
4877 value = error_mark_node;
4883 /* For a vector, the representation type is a struct
4884 containing a single member which is an array of the
4885 appropriate size. */
4886 rtype = TYPE_DEBUG_REPRESENTATION_TYPE (type);
4887 if (rtype && TYPE_DOMAIN (TREE_TYPE (TYPE_FIELDS (rtype))))
4888 max_index = array_type_nelts (TREE_TYPE (TYPE_FIELDS (rtype)));
4890 return reshape_init_array_1 (TREE_TYPE (type), max_index, d);
4893 /* Subroutine of reshape_init_r, processes the initializers for classes
4894 or union. Parameters are the same of reshape_init_r. */
4897 reshape_init_class (tree type, reshape_iter *d, bool first_initializer_p)
4902 gcc_assert (CLASS_TYPE_P (type));
4904 /* The initializer for a class is always a CONSTRUCTOR. */
4905 new_init = build_constructor (init_list_type_node, NULL);
4906 field = next_initializable_field (TYPE_FIELDS (type));
4912 An initializer for an aggregate member that is an
4913 empty class shall have the form of an empty
4914 initializer-list {}. */
4915 if (!first_initializer_p)
4917 error ("initializer for %qT must be brace-enclosed", type);
4918 return error_mark_node;
4923 /* Loop through the initializable fields, gathering initializers. */
4924 while (d->cur != d->end)
4928 /* Handle designated initializers, as an extension. */
4931 field = lookup_field_1 (type, d->cur->index, /*want_type=*/false);
4933 if (!field || TREE_CODE (field) != FIELD_DECL)
4935 error ("%qT has no non-static data member named %qD", type,
4937 return error_mark_node;
4941 /* If we processed all the member of the class, we are done. */
4945 field_init = reshape_init_r (TREE_TYPE (field), d,
4946 /*first_initializer_p=*/false);
4947 if (field_init == error_mark_node)
4948 return error_mark_node;
4950 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init), field, field_init);
4954 When a union is initialized with a brace-enclosed
4955 initializer, the braces shall only contain an
4956 initializer for the first member of the union. */
4957 if (TREE_CODE (type) == UNION_TYPE)
4960 field = next_initializable_field (TREE_CHAIN (field));
4966 /* Subroutine of reshape_init, which processes a single initializer (part of
4967 a CONSTRUCTOR). TYPE is the type of the variable being initialized, D is the
4968 iterator within the CONSTRUCTOR which points to the initializer to process.
4969 FIRST_INITIALIZER_P is true if this is the first initializer of the
4970 outermost CONSTRUCTOR node. */
4973 reshape_init_r (tree type, reshape_iter *d, bool first_initializer_p)
4975 tree init = d->cur->value;
4977 if (error_operand_p (init))
4978 return error_mark_node;
4980 /* A non-aggregate type is always initialized with a single
4982 if (!CP_AGGREGATE_TYPE_P (type))
4984 /* It is invalid to initialize a non-aggregate type with a
4985 brace-enclosed initializer before C++0x.
4986 We need to check for BRACE_ENCLOSED_INITIALIZER_P here because
4987 of g++.old-deja/g++.mike/p7626.C: a pointer-to-member constant is
4988 a CONSTRUCTOR (with a record type). */
4989 if (TREE_CODE (init) == CONSTRUCTOR
4990 && BRACE_ENCLOSED_INITIALIZER_P (init)) /* p7626.C */
4992 if (SCALAR_TYPE_P (type))
4994 error ("braces around scalar initializer for type %qT", type);
4995 init = error_mark_node;
4998 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS);
5007 All implicit type conversions (clause _conv_) are considered when
5008 initializing the aggregate member with an initializer from an
5009 initializer-list. If the initializer can initialize a member,
5010 the member is initialized. Otherwise, if the member is itself a
5011 non-empty subaggregate, brace elision is assumed and the
5012 initializer is considered for the initialization of the first
5013 member of the subaggregate. */
5014 if (TREE_CODE (init) != CONSTRUCTOR
5015 /* But don't try this for the first initializer, since that would be
5016 looking through the outermost braces; A a2 = { a1 }; is not a
5017 valid aggregate initialization. */
5018 && !first_initializer_p
5019 && (same_type_ignoring_top_level_qualifiers_p (type, TREE_TYPE (init))
5020 || can_convert_arg (type, TREE_TYPE (init), init, LOOKUP_NORMAL)))
5026 /* [dcl.init.string]
5028 A char array (whether plain char, signed char, or unsigned char)
5029 can be initialized by a string-literal (optionally enclosed in
5030 braces); a wchar_t array can be initialized by a wide
5031 string-literal (optionally enclosed in braces). */
5032 if (TREE_CODE (type) == ARRAY_TYPE
5033 && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type))))
5035 tree str_init = init;
5037 /* Strip one level of braces if and only if they enclose a single
5038 element (as allowed by [dcl.init.string]). */
5039 if (!first_initializer_p
5040 && TREE_CODE (str_init) == CONSTRUCTOR
5041 && VEC_length (constructor_elt, CONSTRUCTOR_ELTS (str_init)) == 1)
5043 str_init = VEC_index (constructor_elt,
5044 CONSTRUCTOR_ELTS (str_init), 0)->value;
5047 /* If it's a string literal, then it's the initializer for the array
5048 as a whole. Otherwise, continue with normal initialization for
5049 array types (one value per array element). */
5050 if (TREE_CODE (str_init) == STRING_CST)
5057 /* The following cases are about aggregates. If we are not within a full
5058 initializer already, and there is not a CONSTRUCTOR, it means that there
5059 is a missing set of braces (that is, we are processing the case for
5060 which reshape_init exists). */
5061 if (!first_initializer_p)
5063 if (TREE_CODE (init) == CONSTRUCTOR)
5065 if (TREE_TYPE (init) && TYPE_PTRMEMFUNC_P (TREE_TYPE (init)))
5066 /* There is no need to reshape pointer-to-member function
5067 initializers, as they are always constructed correctly
5068 by the front end. */
5070 else if (COMPOUND_LITERAL_P (init))
5071 /* For a nested compound literal, there is no need to reshape since
5072 brace elision is not allowed. Even if we decided to allow it,
5073 we should add a call to reshape_init in finish_compound_literal,
5074 before calling digest_init, so changing this code would still
5075 not be necessary. */
5076 gcc_assert (!BRACE_ENCLOSED_INITIALIZER_P (init));
5080 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init));
5081 return reshape_init (type, init);
5085 warning (OPT_Wmissing_braces, "missing braces around initializer for %qT",
5089 /* Dispatch to specialized routines. */
5090 if (CLASS_TYPE_P (type))
5091 return reshape_init_class (type, d, first_initializer_p);
5092 else if (TREE_CODE (type) == ARRAY_TYPE)
5093 return reshape_init_array (type, d);
5094 else if (TREE_CODE (type) == VECTOR_TYPE)
5095 return reshape_init_vector (type, d);
5100 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
5101 brace-enclosed aggregate initializer.
5103 INIT is the CONSTRUCTOR containing the list of initializers describing
5104 a brace-enclosed initializer for an entity of the indicated aggregate TYPE.
5105 It may not presently match the shape of the TYPE; for example:
5107 struct S { int a; int b; };
5108 struct S a[] = { 1, 2, 3, 4 };
5110 Here INIT will hold a VEC of four elements, rather than a
5111 VEC of two elements, each itself a VEC of two elements. This
5112 routine transforms INIT from the former form into the latter. The
5113 revised CONSTRUCTOR node is returned. */
5116 reshape_init (tree type, tree init)
5118 VEC(constructor_elt, gc) *v;
5122 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init));
5124 v = CONSTRUCTOR_ELTS (init);
5126 /* An empty constructor does not need reshaping, and it is always a valid
5128 if (VEC_empty (constructor_elt, v))
5131 /* Recurse on this CONSTRUCTOR. */
5132 d.cur = VEC_index (constructor_elt, v, 0);
5133 d.end = d.cur + VEC_length (constructor_elt, v);
5135 new_init = reshape_init_r (type, &d, true);
5136 if (new_init == error_mark_node)
5137 return error_mark_node;
5139 /* Make sure all the element of the constructor were used. Otherwise,
5140 issue an error about exceeding initializers. */
5142 error ("too many initializers for %qT", type);
5147 /* Verify array initializer. Returns true if errors have been reported. */
5150 check_array_initializer (tree decl, tree type, tree init)
5152 tree element_type = TREE_TYPE (type);
5154 /* The array type itself need not be complete, because the
5155 initializer may tell us how many elements are in the array.
5156 But, the elements of the array must be complete. */
5157 if (!COMPLETE_TYPE_P (complete_type (element_type)))
5160 error ("elements of array %q#D have incomplete type", decl);
5162 error ("elements of array %q#T have incomplete type", type);
5165 /* It is not valid to initialize a VLA. */
5167 && ((COMPLETE_TYPE_P (type) && !TREE_CONSTANT (TYPE_SIZE (type)))
5168 || !TREE_CONSTANT (TYPE_SIZE (element_type))))
5171 error ("variable-sized object %qD may not be initialized", decl);
5173 error ("variable-sized compound literal");
5179 /* Subroutine of check_initializer; args are passed down from that function.
5180 Set stmts_are_full_exprs_p to 1 across a call to build_aggr_init. */
5183 build_aggr_init_full_exprs (tree decl, tree init, int flags)
5186 int saved_stmts_are_full_exprs_p = 0;
5187 if (building_stmt_tree ())
5189 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
5190 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
5192 init = build_aggr_init (decl, init, flags, tf_warning_or_error);
5193 if (building_stmt_tree ())
5194 current_stmt_tree ()->stmts_are_full_exprs_p =
5195 saved_stmts_are_full_exprs_p;
5199 /* Verify INIT (the initializer for DECL), and record the
5200 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
5201 grok_reference_init.
5203 If the return value is non-NULL, it is an expression that must be
5204 evaluated dynamically to initialize DECL. */
5207 check_initializer (tree decl, tree init, int flags, tree *cleanup)
5209 tree type = TREE_TYPE (decl);
5210 tree init_code = NULL;
5213 /* Things that are going to be initialized need to have complete
5215 TREE_TYPE (decl) = type = complete_type (TREE_TYPE (decl));
5217 if (type == error_mark_node)
5218 /* We will have already complained. */
5221 if (TREE_CODE (type) == ARRAY_TYPE)
5223 if (check_array_initializer (decl, type, init))
5226 else if (!COMPLETE_TYPE_P (type))
5228 error ("%qD has incomplete type", decl);
5229 TREE_TYPE (decl) = error_mark_node;
5233 /* There is no way to make a variable-sized class type in GNU C++. */
5234 gcc_assert (TREE_CONSTANT (TYPE_SIZE (type)));
5236 if (init && BRACE_ENCLOSED_INITIALIZER_P (init))
5238 int init_len = VEC_length (constructor_elt, CONSTRUCTOR_ELTS (init));
5239 if (SCALAR_TYPE_P (type))
5243 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS);
5244 init = build_zero_init (type, NULL_TREE, false);
5246 else if (init_len != 1)
5248 error ("scalar object %qD requires one element in initializer",
5250 TREE_TYPE (decl) = error_mark_node;
5256 if (TREE_CODE (decl) == CONST_DECL)
5258 gcc_assert (TREE_CODE (type) != REFERENCE_TYPE);
5260 DECL_INITIAL (decl) = init;
5262 gcc_assert (init != NULL_TREE);
5265 else if (!DECL_EXTERNAL (decl) && TREE_CODE (type) == REFERENCE_TYPE)
5266 init = grok_reference_init (decl, type, init, cleanup);
5269 /* Do not reshape constructors of vectors (they don't need to be
5271 if (BRACE_ENCLOSED_INITIALIZER_P (init))
5273 if (is_std_init_list (type))
5274 return build_init_list_var_init (decl, type, init, cleanup);
5275 else if (TYPE_NON_AGGREGATE_CLASS (type))
5277 /* Don't reshape if the class has constructors. */
5278 if (cxx_dialect == cxx98)
5279 error ("in C++98 %qD must be initialized by constructor, "
5283 else if (TREE_CODE (type) == VECTOR_TYPE && TYPE_VECTOR_OPAQUE (type))
5285 error ("opaque vector types cannot be initialized");
5286 init = error_mark_node;
5289 init = reshape_init (type, init);
5292 /* If DECL has an array type without a specific bound, deduce the
5293 array size from the initializer. */
5294 maybe_deduce_size_from_array_init (decl, init);
5295 type = TREE_TYPE (decl);
5296 if (type == error_mark_node)
5299 if (TYPE_NEEDS_CONSTRUCTING (type)
5300 || (CLASS_TYPE_P (type)
5301 && !BRACE_ENCLOSED_INITIALIZER_P (init)))
5302 return build_aggr_init_full_exprs (decl, init, flags);
5303 else if (TREE_CODE (init) != TREE_VEC)
5305 init_code = store_init_value (decl, init, flags);
5306 if (pedantic && TREE_CODE (type) == ARRAY_TYPE
5307 && DECL_INITIAL (decl)
5308 && TREE_CODE (DECL_INITIAL (decl)) == STRING_CST
5309 && PAREN_STRING_LITERAL_P (DECL_INITIAL (decl)))
5310 warning (0, "array %qD initialized by parenthesized string literal %qE",
5311 decl, DECL_INITIAL (decl));
5315 else if (DECL_EXTERNAL (decl))
5317 else if (TYPE_P (type) && TYPE_NEEDS_CONSTRUCTING (type))
5319 check_for_uninitialized_const_var (decl);
5320 return build_aggr_init_full_exprs (decl, init, flags);
5322 else if (MAYBE_CLASS_TYPE_P (core_type = strip_array_types (type)))
5324 if (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type)
5325 || CLASSTYPE_REF_FIELDS_NEED_INIT (core_type))
5326 diagnose_uninitialized_cst_or_ref_member (core_type, /*using_new=*/false,
5329 check_for_uninitialized_const_var (decl);
5332 check_for_uninitialized_const_var (decl);
5334 if (init && init != error_mark_node)
5335 init_code = build2 (INIT_EXPR, type, decl, init);
5340 /* If DECL is not a local variable, give it RTL. */
5343 make_rtl_for_nonlocal_decl (tree decl, tree init, const char* asmspec)
5345 int toplev = toplevel_bindings_p ();
5347 const char *filename;
5349 /* Set the DECL_ASSEMBLER_NAME for the object. */
5352 /* The `register' keyword, when used together with an
5353 asm-specification, indicates that the variable should be
5354 placed in a particular register. */
5355 if (TREE_CODE (decl) == VAR_DECL && DECL_REGISTER (decl))
5357 set_user_assembler_name (decl, asmspec);
5358 DECL_HARD_REGISTER (decl) = 1;
5362 if (TREE_CODE (decl) == FUNCTION_DECL
5363 && DECL_BUILT_IN_CLASS (decl) == BUILT_IN_NORMAL)
5364 set_builtin_user_assembler_name (decl, asmspec);
5365 set_user_assembler_name (decl, asmspec);
5369 /* Handle non-variables up front. */
5370 if (TREE_CODE (decl) != VAR_DECL)
5372 rest_of_decl_compilation (decl, toplev, at_eof);
5376 /* If we see a class member here, it should be a static data
5378 if (DECL_LANG_SPECIFIC (decl) && DECL_IN_AGGR_P (decl))
5380 gcc_assert (TREE_STATIC (decl));
5381 /* An in-class declaration of a static data member should be
5382 external; it is only a declaration, and not a definition. */
5383 if (init == NULL_TREE)
5384 gcc_assert (DECL_EXTERNAL (decl) || !TREE_PUBLIC (decl));
5387 /* We don't create any RTL for local variables. */
5388 if (DECL_FUNCTION_SCOPE_P (decl) && !TREE_STATIC (decl))
5391 /* We defer emission of local statics until the corresponding
5392 DECL_EXPR is expanded. */
5393 defer_p = DECL_FUNCTION_SCOPE_P (decl) || DECL_VIRTUAL_P (decl);
5395 /* We try to defer namespace-scope static constants so that they are
5396 not emitted into the object file unnecessarily. */
5397 filename = input_filename;
5398 if (!DECL_VIRTUAL_P (decl)
5399 && TREE_READONLY (decl)
5400 && DECL_INITIAL (decl) != NULL_TREE
5401 && DECL_INITIAL (decl) != error_mark_node
5403 && ! EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl))
5405 && !TREE_PUBLIC (decl))
5407 /* Fool with the linkage of static consts according to #pragma
5409 struct c_fileinfo *finfo = get_fileinfo (filename);
5410 if (!finfo->interface_unknown && !TREE_PUBLIC (decl))
5412 TREE_PUBLIC (decl) = 1;
5413 DECL_EXTERNAL (decl) = finfo->interface_only;
5418 /* Likewise for template instantiations. */
5419 else if (DECL_LANG_SPECIFIC (decl)
5420 && DECL_IMPLICIT_INSTANTIATION (decl))
5423 /* If we're not deferring, go ahead and assemble the variable. */
5425 rest_of_decl_compilation (decl, toplev, at_eof);
5428 /* walk_tree helper for wrap_temporary_cleanups, below. */
5431 wrap_cleanups_r (tree *stmt_p, int *walk_subtrees, void *data)
5433 if (TYPE_P (*stmt_p))
5439 if (TREE_CODE (*stmt_p) == TARGET_EXPR)
5441 tree guard = (tree)data;
5442 tree tcleanup = TARGET_EXPR_CLEANUP (*stmt_p);
5444 tcleanup = build2 (TRY_CATCH_EXPR, void_type_node, tcleanup, guard);
5445 /* Tell honor_protect_cleanup_actions to handle this as a separate
5447 TRY_CATCH_IS_CLEANUP (tcleanup) = 1;
5449 TARGET_EXPR_CLEANUP (*stmt_p) = tcleanup;
5455 /* We're initializing a local variable which has a cleanup GUARD. If there
5456 are any temporaries used in the initializer INIT of this variable, we
5457 need to wrap their cleanups with TRY_CATCH_EXPR (, GUARD) so that the
5458 variable will be cleaned up properly if one of them throws.
5460 Unfortunately, there's no way to express this properly in terms of
5461 nesting, as the regions for the temporaries overlap the region for the
5462 variable itself; if there are two temporaries, the variable needs to be
5463 the first thing destroyed if either of them throws. However, we only
5464 want to run the variable's cleanup if it actually got constructed. So
5465 we need to guard the temporary cleanups with the variable's cleanup if
5466 they are run on the normal path, but not if they are run on the
5467 exceptional path. We implement this by telling
5468 honor_protect_cleanup_actions to strip the variable cleanup from the
5469 exceptional path. */
5472 wrap_temporary_cleanups (tree init, tree guard)
5474 cp_walk_tree_without_duplicates (&init, wrap_cleanups_r, (void *)guard);
5477 /* Generate code to initialize DECL (a local variable). */
5480 initialize_local_var (tree decl, tree init)
5482 tree type = TREE_TYPE (decl);
5486 gcc_assert (TREE_CODE (decl) == VAR_DECL
5487 || TREE_CODE (decl) == RESULT_DECL);
5488 gcc_assert (!TREE_STATIC (decl));
5490 if (DECL_SIZE (decl) == NULL_TREE)
5492 /* If we used it already as memory, it must stay in memory. */
5493 DECL_INITIAL (decl) = NULL_TREE;
5494 TREE_ADDRESSABLE (decl) = TREE_USED (decl);
5498 if (type == error_mark_node)
5501 /* Compute and store the initial value. */
5502 already_used = TREE_USED (decl) || TREE_USED (type);
5504 /* Generate a cleanup, if necessary. */
5505 cleanup = cxx_maybe_build_cleanup (decl);
5507 /* Perform the initialization. */
5510 int saved_stmts_are_full_exprs_p;
5512 /* If we're only initializing a single object, guard the destructors
5513 of any temporaries used in its initializer with its destructor.
5514 This isn't right for arrays because each element initialization is
5515 a full-expression. */
5516 if (cleanup && TREE_CODE (type) != ARRAY_TYPE)
5517 wrap_temporary_cleanups (init, cleanup);
5519 gcc_assert (building_stmt_tree ());
5520 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
5521 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
5522 finish_expr_stmt (init);
5523 current_stmt_tree ()->stmts_are_full_exprs_p =
5524 saved_stmts_are_full_exprs_p;
5527 /* Set this to 0 so we can tell whether an aggregate which was
5528 initialized was ever used. Don't do this if it has a
5529 destructor, so we don't complain about the 'resource
5530 allocation is initialization' idiom. Now set
5531 attribute((unused)) on types so decls of that type will be
5532 marked used. (see TREE_USED, above.) */
5533 if (TYPE_NEEDS_CONSTRUCTING (type)
5535 && TYPE_HAS_TRIVIAL_DESTRUCTOR (type)
5536 && DECL_NAME (decl))
5537 TREE_USED (decl) = 0;
5538 else if (already_used)
5539 TREE_USED (decl) = 1;
5542 finish_decl_cleanup (decl, cleanup);
5545 /* DECL is a VAR_DECL for a compiler-generated variable with static
5546 storage duration (like a virtual table) whose initializer is a
5547 compile-time constant. INIT must be either a TREE_LIST of values,
5548 or a CONSTRUCTOR. Initialize the variable and provide it to the
5552 initialize_artificial_var (tree decl, tree init)
5554 gcc_assert (DECL_ARTIFICIAL (decl));
5555 if (TREE_CODE (init) == TREE_LIST)
5556 init = build_constructor_from_list (TREE_TYPE (decl), init);
5557 gcc_assert (TREE_CODE (init) == CONSTRUCTOR);
5558 DECL_INITIAL (decl) = init;
5559 DECL_INITIALIZED_P (decl) = 1;
5560 determine_visibility (decl);
5561 layout_var_decl (decl);
5562 maybe_commonize_var (decl);
5563 make_rtl_for_nonlocal_decl (decl, init, /*asmspec=*/NULL);
5566 /* INIT is the initializer for a variable, as represented by the
5567 parser. Returns true iff INIT is value-dependent. */
5570 value_dependent_init_p (tree init)
5572 if (TREE_CODE (init) == TREE_LIST)
5573 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
5574 return any_value_dependent_elements_p (init);
5575 else if (TREE_CODE (init) == CONSTRUCTOR)
5576 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
5578 VEC(constructor_elt, gc) *elts;
5582 elts = CONSTRUCTOR_ELTS (init);
5583 nelts = VEC_length (constructor_elt, elts);
5584 for (i = 0; i < nelts; ++i)
5585 if (value_dependent_init_p (VEC_index (constructor_elt,
5590 /* It must be a simple expression, e.g., int i = 3; */
5591 return value_dependent_expression_p (init);
5596 /* Finish processing of a declaration;
5597 install its line number and initial value.
5598 If the length of an array type is not known before,
5599 it must be determined now, from the initial value, or it is an error.
5601 INIT is the initializer (if any) for DECL. If INIT_CONST_EXPR_P is
5602 true, then INIT is an integral constant expression.
5604 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
5605 if the (init) syntax was used. */
5608 cp_finish_decl (tree decl, tree init, bool init_const_expr_p,
5609 tree asmspec_tree, int flags)
5613 const char *asmspec = NULL;
5614 int was_readonly = 0;
5615 bool var_definition_p = false;
5616 int saved_processing_template_decl;
5619 if (decl == error_mark_node)
5624 error ("assignment (not initialization) in declaration");
5628 gcc_assert (TREE_CODE (decl) != RESULT_DECL);
5629 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
5630 gcc_assert (TREE_CODE (decl) != PARM_DECL);
5632 type = TREE_TYPE (decl);
5633 if (type == error_mark_node)
5636 /* Assume no cleanup is required. */
5637 cleanup = NULL_TREE;
5638 saved_processing_template_decl = processing_template_decl;
5640 /* If a name was specified, get the string. */
5641 if (global_scope_p (current_binding_level))
5642 asmspec_tree = maybe_apply_renaming_pragma (decl, asmspec_tree);
5643 if (asmspec_tree && asmspec_tree != error_mark_node)
5644 asmspec = TREE_STRING_POINTER (asmspec_tree);
5646 if (current_class_type
5647 && CP_DECL_CONTEXT (decl) == current_class_type
5648 && TYPE_BEING_DEFINED (current_class_type)
5649 && (DECL_INITIAL (decl) || init))
5650 DECL_INITIALIZED_IN_CLASS_P (decl) = 1;
5652 auto_node = type_uses_auto (type);
5655 if (init == NULL_TREE)
5657 error ("declaration of %q#D has no initializer", decl);
5658 TREE_TYPE (decl) = error_mark_node;
5661 if (TREE_CODE (init) == TREE_LIST)
5662 init = build_x_compound_expr_from_list (init, "initializer");
5663 if (describable_type (init))
5665 type = TREE_TYPE (decl) = do_auto_deduction (type, init, auto_node);
5666 if (type == error_mark_node)
5671 if (init && TREE_CODE (decl) == FUNCTION_DECL)
5674 if (init == ridpointers[(int)RID_DELETE])
5676 /* FIXME check this is 1st decl. */
5677 DECL_DELETED_FN (decl) = 1;
5678 DECL_DECLARED_INLINE_P (decl) = 1;
5679 DECL_INITIAL (decl) = error_mark_node;
5680 FOR_EACH_CLONE (clone, decl)
5682 DECL_DELETED_FN (clone) = 1;
5683 DECL_DECLARED_INLINE_P (clone) = 1;
5684 DECL_INITIAL (clone) = error_mark_node;
5688 else if (init == ridpointers[(int)RID_DEFAULT])
5690 if (defaultable_fn_check (decl))
5691 DECL_DEFAULTED_FN (decl) = 1;
5693 DECL_INITIAL (decl) = NULL_TREE;
5697 if (processing_template_decl)
5699 bool type_dependent_p;
5701 /* Add this declaration to the statement-tree. */
5702 if (at_function_scope_p ())
5703 add_decl_expr (decl);
5705 type_dependent_p = dependent_type_p (type);
5707 if (check_for_bare_parameter_packs (init))
5710 DECL_INITIAL (decl) = NULL_TREE;
5713 if (init && init_const_expr_p && TREE_CODE (decl) == VAR_DECL)
5715 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl) = 1;
5716 if (DECL_INTEGRAL_CONSTANT_VAR_P (decl))
5717 TREE_CONSTANT (decl) = 1;
5720 /* Generally, initializers in templates are expanded when the
5721 template is instantiated. But, if DECL is an integral
5722 constant static data member, then it can be used in future
5723 integral constant expressions, and its value must be
5726 && DECL_CLASS_SCOPE_P (decl)
5727 && DECL_INTEGRAL_CONSTANT_VAR_P (decl)
5728 && !type_dependent_p
5729 && !value_dependent_init_p (init)))
5732 DECL_INITIAL (decl) = init;
5733 if (TREE_CODE (decl) == VAR_DECL
5734 && !DECL_PRETTY_FUNCTION_P (decl)
5735 && !type_dependent_p)
5736 maybe_deduce_size_from_array_init (decl, init);
5740 if (TREE_CODE (init) == TREE_LIST)
5742 /* If the parenthesized-initializer form was used (e.g.,
5743 "int A<N>::i(X)"), then INIT will be a TREE_LIST of initializer
5744 arguments. (There is generally only one.) We convert them
5747 for (; list; list = TREE_CHAIN (list))
5749 tree elt = TREE_VALUE (list);
5750 TREE_VALUE (list) = fold_non_dependent_expr (elt);
5754 init = fold_non_dependent_expr (init);
5755 processing_template_decl = 0;
5758 /* Take care of TYPE_DECLs up front. */
5759 if (TREE_CODE (decl) == TYPE_DECL)
5761 if (type != error_mark_node
5762 && MAYBE_CLASS_TYPE_P (type) && DECL_NAME (decl))
5764 if (TREE_TYPE (DECL_NAME (decl)) && TREE_TYPE (decl) != type)
5765 warning (0, "shadowing previous type declaration of %q#D", decl);
5766 set_identifier_type_value (DECL_NAME (decl), decl);
5769 /* If we have installed this as the canonical typedef for this
5770 type, and that type has not been defined yet, delay emitting
5771 the debug information for it, as we will emit it later. */
5772 if (TYPE_MAIN_DECL (TREE_TYPE (decl)) == decl
5773 && !COMPLETE_TYPE_P (TREE_TYPE (decl)))
5774 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
5776 rest_of_decl_compilation (decl, DECL_CONTEXT (decl) == NULL_TREE,
5781 /* A reference will be modified here, as it is initialized. */
5782 if (! DECL_EXTERNAL (decl)
5783 && TREE_READONLY (decl)
5784 && TREE_CODE (type) == REFERENCE_TYPE)
5787 TREE_READONLY (decl) = 0;
5790 if (TREE_CODE (decl) == VAR_DECL)
5792 /* Only variables with trivial initialization and destruction can
5793 have thread-local storage. */
5794 if (DECL_THREAD_LOCAL_P (decl)
5795 && (type_has_nontrivial_default_init (TREE_TYPE (decl))
5796 || TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl))))
5797 error ("%qD cannot be thread-local because it has non-trivial "
5798 "type %qT", decl, TREE_TYPE (decl));
5799 /* If this is a local variable that will need a mangled name,
5800 register it now. We must do this before processing the
5801 initializer for the variable, since the initialization might
5802 require a guard variable, and since the mangled name of the
5803 guard variable will depend on the mangled name of this
5805 if (DECL_FUNCTION_SCOPE_P (decl)
5806 && TREE_STATIC (decl)
5807 && !DECL_ARTIFICIAL (decl))
5809 push_local_name (decl);
5810 if (DECL_CONSTRUCTOR_P (current_function_decl)
5811 || DECL_DESTRUCTOR_P (current_function_decl))
5812 /* Normally local_decls is populated during GIMPLE lowering,
5813 but [cd]tors are never actually compiled directly. We need
5814 to put statics on the list so we can deal with the label
5815 address extension. */
5816 cfun->local_decls = tree_cons (NULL_TREE, decl,
5820 /* Convert the initializer to the type of DECL, if we have not
5821 already initialized DECL. */
5822 if (!DECL_INITIALIZED_P (decl)
5823 /* If !DECL_EXTERNAL then DECL is being defined. In the
5824 case of a static data member initialized inside the
5825 class-specifier, there can be an initializer even if DECL
5826 is *not* defined. */
5827 && (!DECL_EXTERNAL (decl) || init))
5829 if (TYPE_FOR_JAVA (type) && MAYBE_CLASS_TYPE_P (type))
5832 = IDENTIFIER_GLOBAL_VALUE (get_identifier ("jclass"));
5833 /* Allow libjava/prims.cc define primitive classes. */
5834 if (init != NULL_TREE
5835 || jclass == NULL_TREE
5836 || TREE_CODE (jclass) != TYPE_DECL
5837 || !POINTER_TYPE_P (TREE_TYPE (jclass))
5838 || !same_type_ignoring_top_level_qualifiers_p
5839 (type, TREE_TYPE (TREE_TYPE (jclass))))
5840 error ("Java object %qD not allocated with %<new%>", decl);
5845 DECL_NONTRIVIALLY_INITIALIZED_P (decl) = 1;
5846 if (init_const_expr_p)
5848 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl) = 1;
5849 if (DECL_INTEGRAL_CONSTANT_VAR_P (decl))
5850 TREE_CONSTANT (decl) = 1;
5853 init = check_initializer (decl, init, flags, &cleanup);
5854 /* Thread-local storage cannot be dynamically initialized. */
5855 if (DECL_THREAD_LOCAL_P (decl) && init)
5857 error ("%qD is thread-local and so cannot be dynamically "
5858 "initialized", decl);
5862 /* Check that the initializer for a static data member was a
5863 constant. Although we check in the parser that the
5864 initializer is an integral constant expression, we do not
5865 simplify division-by-zero at the point at which it
5866 occurs. Therefore, in:
5868 struct S { static const int i = 7 / 0; };
5870 we issue an error at this point. It would
5871 probably be better to forbid division by zero in
5872 integral constant expressions. */
5873 if (DECL_EXTERNAL (decl) && init)
5875 error ("%qD cannot be initialized by a non-constant expression"
5876 " when being declared", decl);
5877 DECL_INITIALIZED_IN_CLASS_P (decl) = 0;
5885 The memory occupied by any object of static storage
5886 duration is zero-initialized at program startup before
5887 any other initialization takes place.
5889 We cannot create an appropriate initializer until after
5890 the type of DECL is finalized. If DECL_INITIAL is set,
5891 then the DECL is statically initialized, and any
5892 necessary zero-initialization has already been performed. */
5893 if (TREE_STATIC (decl) && !DECL_INITIAL (decl))
5894 DECL_INITIAL (decl) = build_zero_init (TREE_TYPE (decl),
5895 /*nelts=*/NULL_TREE,
5896 /*static_storage_p=*/true);
5897 /* Remember that the initialization for this variable has
5899 DECL_INITIALIZED_P (decl) = 1;
5900 /* This declaration is the definition of this variable,
5901 unless we are initializing a static data member within
5902 the class specifier. */
5903 if (!DECL_EXTERNAL (decl))
5904 var_definition_p = true;
5906 /* If the variable has an array type, lay out the type, even if
5907 there is no initializer. It is valid to index through the
5908 array, and we must get TYPE_ALIGN set correctly on the array
5910 else if (TREE_CODE (type) == ARRAY_TYPE)
5913 if (!processing_template_decl
5914 && TREE_STATIC (decl)
5915 && !at_function_scope_p ()
5916 && current_function_decl == NULL)
5917 /* So decl is a global variable or a static member of a
5918 non local class. Record the types it uses
5919 so that we can decide later to emit debug info for them. */
5920 record_types_used_by_current_var_decl (decl);
5922 else if (TREE_CODE (decl) == FIELD_DECL
5923 && TYPE_FOR_JAVA (type) && MAYBE_CLASS_TYPE_P (type))
5924 error ("non-static data member %qD has Java class type", decl);
5926 /* Add this declaration to the statement-tree. This needs to happen
5927 after the call to check_initializer so that the DECL_EXPR for a
5928 reference temp is added before the DECL_EXPR for the reference itself. */
5929 if (at_function_scope_p ())
5930 add_decl_expr (decl);
5932 /* Let the middle end know about variables and functions -- but not
5933 static data members in uninstantiated class templates. */
5934 if (!saved_processing_template_decl
5935 && (TREE_CODE (decl) == VAR_DECL
5936 || TREE_CODE (decl) == FUNCTION_DECL))
5938 if (TREE_CODE (decl) == VAR_DECL)
5940 layout_var_decl (decl);
5941 maybe_commonize_var (decl);
5944 /* This needs to happen after the linkage is set. */
5945 determine_visibility (decl);
5947 if (var_definition_p && TREE_STATIC (decl))
5949 /* If a TREE_READONLY variable needs initialization
5950 at runtime, it is no longer readonly and we need to
5951 avoid MEM_READONLY_P being set on RTL created for it. */
5954 if (TREE_READONLY (decl))
5955 TREE_READONLY (decl) = 0;
5958 else if (was_readonly)
5959 TREE_READONLY (decl) = 1;
5962 make_rtl_for_nonlocal_decl (decl, init, asmspec);
5964 /* Check for abstractness of the type. Notice that there is no
5965 need to strip array types here since the check for those types
5966 is already done within create_array_type_for_decl. */
5967 if (TREE_CODE (type) == FUNCTION_TYPE
5968 || TREE_CODE (type) == METHOD_TYPE)
5969 abstract_virtuals_error (decl, TREE_TYPE (type));
5971 abstract_virtuals_error (decl, type);
5973 if (TREE_TYPE (decl) == error_mark_node)
5974 /* No initialization required. */
5976 else if (TREE_CODE (decl) == FUNCTION_DECL)
5980 if (init == ridpointers[(int)RID_DEFAULT])
5982 /* An out-of-class default definition is defined at
5983 the point where it is explicitly defaulted. */
5984 if (DECL_INITIAL (decl) == error_mark_node)
5985 synthesize_method (decl);
5988 error ("function %q#D is initialized like a variable", decl);
5990 /* else no initialization required. */
5992 else if (DECL_EXTERNAL (decl)
5993 && ! (DECL_LANG_SPECIFIC (decl)
5994 && DECL_NOT_REALLY_EXTERN (decl)))
5997 DECL_INITIAL (decl) = init;
5999 /* A variable definition. */
6000 else if (DECL_FUNCTION_SCOPE_P (decl) && !TREE_STATIC (decl))
6001 /* Initialize the local variable. */
6002 initialize_local_var (decl, init);
6004 /* If a variable is defined, and then a subsequent
6005 definition with external linkage is encountered, we will
6006 get here twice for the same variable. We want to avoid
6007 calling expand_static_init more than once. For variables
6008 that are not static data members, we can call
6009 expand_static_init only when we actually process the
6010 initializer. It is not legal to redeclare a static data
6011 member, so this issue does not arise in that case. */
6012 else if (var_definition_p && TREE_STATIC (decl))
6013 expand_static_init (decl, init);
6016 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
6017 reference, insert it in the statement-tree now. */
6019 push_cleanup (decl, cleanup, false);
6022 processing_template_decl = saved_processing_template_decl;
6025 TREE_READONLY (decl) = 1;
6028 /* Returns a declaration for a VAR_DECL as if:
6030 extern "C" TYPE NAME;
6032 had been seen. Used to create compiler-generated global
6036 declare_global_var (tree name, tree type)
6040 push_to_top_level ();
6041 decl = build_decl (input_location, VAR_DECL, name, type);
6042 TREE_PUBLIC (decl) = 1;
6043 DECL_EXTERNAL (decl) = 1;
6044 DECL_ARTIFICIAL (decl) = 1;
6045 /* If the user has explicitly declared this variable (perhaps
6046 because the code we are compiling is part of a low-level runtime
6047 library), then it is possible that our declaration will be merged
6048 with theirs by pushdecl. */
6049 decl = pushdecl (decl);
6050 cp_finish_decl (decl, NULL_TREE, false, NULL_TREE, 0);
6051 pop_from_top_level ();
6056 /* Returns the type for the argument to "__cxa_atexit" (or "atexit",
6057 if "__cxa_atexit" is not being used) corresponding to the function
6058 to be called when the program exits. */
6061 get_atexit_fn_ptr_type (void)
6066 if (!atexit_fn_ptr_type_node)
6068 if (flag_use_cxa_atexit
6069 && !targetm.cxx.use_atexit_for_cxa_atexit ())
6070 /* The parameter to "__cxa_atexit" is "void (*)(void *)". */
6071 arg_types = tree_cons (NULL_TREE, ptr_type_node, void_list_node);
6073 /* The parameter to "atexit" is "void (*)(void)". */
6074 arg_types = void_list_node;
6076 fn_type = build_function_type (void_type_node, arg_types);
6077 atexit_fn_ptr_type_node = build_pointer_type (fn_type);
6080 return atexit_fn_ptr_type_node;
6083 /* Returns a pointer to the `atexit' function. Note that if
6084 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
6085 `__cxa_atexit' function specified in the IA64 C++ ABI. */
6088 get_atexit_node (void)
6095 bool use_aeabi_atexit;
6100 if (flag_use_cxa_atexit && !targetm.cxx.use_atexit_for_cxa_atexit ())
6102 /* The declaration for `__cxa_atexit' is:
6104 int __cxa_atexit (void (*)(void *), void *, void *)
6106 We build up the argument types and then then function type
6109 use_aeabi_atexit = targetm.cxx.use_aeabi_atexit ();
6110 /* First, build the pointer-to-function type for the first
6112 fn_ptr_type = get_atexit_fn_ptr_type ();
6113 /* Then, build the rest of the argument types. */
6114 arg_types = tree_cons (NULL_TREE, ptr_type_node, void_list_node);
6115 if (use_aeabi_atexit)
6117 arg_types = tree_cons (NULL_TREE, fn_ptr_type, arg_types);
6118 arg_types = tree_cons (NULL_TREE, ptr_type_node, arg_types);
6122 arg_types = tree_cons (NULL_TREE, ptr_type_node, arg_types);
6123 arg_types = tree_cons (NULL_TREE, fn_ptr_type, arg_types);
6125 /* And the final __cxa_atexit type. */
6126 fn_type = build_function_type (integer_type_node, arg_types);
6127 fn_ptr_type = build_pointer_type (fn_type);
6128 if (use_aeabi_atexit)
6129 name = "__aeabi_atexit";
6131 name = "__cxa_atexit";
6135 /* The declaration for `atexit' is:
6137 int atexit (void (*)());
6139 We build up the argument types and then then function type
6141 fn_ptr_type = get_atexit_fn_ptr_type ();
6142 arg_types = tree_cons (NULL_TREE, fn_ptr_type, void_list_node);
6143 /* Build the final atexit type. */
6144 fn_type = build_function_type (integer_type_node, arg_types);
6148 /* Now, build the function declaration. */
6149 push_lang_context (lang_name_c);
6150 atexit_fndecl = build_library_fn_ptr (name, fn_type);
6151 mark_used (atexit_fndecl);
6152 pop_lang_context ();
6153 atexit_node = decay_conversion (atexit_fndecl);
6158 /* Returns the __dso_handle VAR_DECL. */
6161 get_dso_handle_node (void)
6163 if (dso_handle_node)
6164 return dso_handle_node;
6166 /* Declare the variable. */
6167 dso_handle_node = declare_global_var (get_identifier ("__dso_handle"),
6170 return dso_handle_node;
6173 /* Begin a new function with internal linkage whose job will be simply
6174 to destroy some particular variable. */
6176 static GTY(()) int start_cleanup_cnt;
6179 start_cleanup_fn (void)
6184 bool use_cxa_atexit = flag_use_cxa_atexit
6185 && !targetm.cxx.use_atexit_for_cxa_atexit ();
6187 push_to_top_level ();
6189 /* No need to mangle this. */
6190 push_lang_context (lang_name_c);
6192 /* Build the name of the function. */
6193 sprintf (name, "__tcf_%d", start_cleanup_cnt++);
6194 /* Build the function declaration. */
6195 fntype = TREE_TYPE (get_atexit_fn_ptr_type ());
6196 fndecl = build_lang_decl (FUNCTION_DECL, get_identifier (name), fntype);
6197 /* It's a function with internal linkage, generated by the
6199 TREE_PUBLIC (fndecl) = 0;
6200 DECL_ARTIFICIAL (fndecl) = 1;
6201 /* Make the function `inline' so that it is only emitted if it is
6202 actually needed. It is unlikely that it will be inlined, since
6203 it is only called via a function pointer, but we avoid unnecessary
6204 emissions this way. */
6205 DECL_DECLARED_INLINE_P (fndecl) = 1;
6206 DECL_INTERFACE_KNOWN (fndecl) = 1;
6207 /* Build the parameter. */
6212 parmdecl = cp_build_parm_decl (NULL_TREE, ptr_type_node);
6213 DECL_CONTEXT (parmdecl) = fndecl;
6214 TREE_USED (parmdecl) = 1;
6215 DECL_READ_P (parmdecl) = 1;
6216 DECL_ARGUMENTS (fndecl) = parmdecl;
6220 start_preparsed_function (fndecl, NULL_TREE, SF_PRE_PARSED);
6222 pop_lang_context ();
6224 return current_function_decl;
6227 /* Finish the cleanup function begun by start_cleanup_fn. */
6230 end_cleanup_fn (void)
6232 expand_or_defer_fn (finish_function (0));
6234 pop_from_top_level ();
6237 /* Generate code to handle the destruction of DECL, an object with
6238 static storage duration. */
6241 register_dtor_fn (tree decl)
6250 type = TREE_TYPE (decl);
6251 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (type))
6252 return void_zero_node;
6254 /* If we're using "__cxa_atexit" (or "__aeabi_atexit"), and DECL is
6255 a class object, we can just pass the destructor to
6256 "__cxa_atexit"; we don't have to build a temporary function to do
6258 use_dtor = (flag_use_cxa_atexit
6259 && !targetm.cxx.use_atexit_for_cxa_atexit ()
6260 && CLASS_TYPE_P (type));
6265 /* Find the destructor. */
6266 idx = lookup_fnfields_1 (type, complete_dtor_identifier);
6267 gcc_assert (idx >= 0);
6268 cleanup = VEC_index (tree, CLASSTYPE_METHOD_VEC (type), idx);
6269 /* Make sure it is accessible. */
6270 perform_or_defer_access_check (TYPE_BINFO (type), cleanup, cleanup);
6274 /* Call build_cleanup before we enter the anonymous function so
6275 that any access checks will be done relative to the current
6276 scope, rather than the scope of the anonymous function. */
6277 build_cleanup (decl);
6279 /* Now start the function. */
6280 cleanup = start_cleanup_fn ();
6282 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
6283 to the original function, rather than the anonymous one. That
6284 will make the back end think that nested functions are in use,
6285 which causes confusion. */
6286 push_deferring_access_checks (dk_no_check);
6287 fcall = build_cleanup (decl);
6288 pop_deferring_access_checks ();
6290 /* Create the body of the anonymous function. */
6291 compound_stmt = begin_compound_stmt (BCS_FN_BODY);
6292 finish_expr_stmt (fcall);
6293 finish_compound_stmt (compound_stmt);
6297 /* Call atexit with the cleanup function. */
6298 mark_used (cleanup);
6299 cleanup = build_address (cleanup);
6300 if (flag_use_cxa_atexit && !targetm.cxx.use_atexit_for_cxa_atexit ())
6306 /* We must convert CLEANUP to the type that "__cxa_atexit"
6308 cleanup = build_nop (get_atexit_fn_ptr_type (), cleanup);
6309 /* "__cxa_atexit" will pass the address of DECL to the
6310 cleanup function. */
6312 addr = build_address (decl);
6313 /* The declared type of the parameter to "__cxa_atexit" is
6314 "void *". For plain "T*", we could just let the
6315 machinery in cp_build_function_call convert it -- but if the
6316 type is "cv-qualified T *", then we need to convert it
6317 before passing it in, to avoid spurious errors. */
6318 addr = build_nop (ptr_type_node, addr);
6321 /* Since the cleanup functions we build ignore the address
6322 they're given, there's no reason to pass the actual address
6323 in, and, in general, it's cheaper to pass NULL than any
6325 addr = null_pointer_node;
6326 args = tree_cons (NULL_TREE,
6327 cp_build_unary_op (ADDR_EXPR, get_dso_handle_node (), 0,
6328 tf_warning_or_error),
6330 if (targetm.cxx.use_aeabi_atexit ())
6332 args = tree_cons (NULL_TREE, cleanup, args);
6333 args = tree_cons (NULL_TREE, addr, args);
6337 args = tree_cons (NULL_TREE, addr, args);
6338 args = tree_cons (NULL_TREE, cleanup, args);
6342 args = tree_cons (NULL_TREE, cleanup, NULL_TREE);
6343 return cp_build_function_call (get_atexit_node (), args,
6344 tf_warning_or_error);
6347 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
6348 is its initializer. Generate code to handle the construction
6349 and destruction of DECL. */
6352 expand_static_init (tree decl, tree init)
6354 gcc_assert (TREE_CODE (decl) == VAR_DECL);
6355 gcc_assert (TREE_STATIC (decl));
6357 /* Some variables require no initialization. */
6359 && !TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl))
6360 && TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
6363 if (DECL_FUNCTION_SCOPE_P (decl))
6365 /* Emit code to perform this initialization but once. */
6366 tree if_stmt = NULL_TREE, inner_if_stmt = NULL_TREE;
6367 tree then_clause = NULL_TREE, inner_then_clause = NULL_TREE;
6368 tree guard, guard_addr;
6369 tree acquire_fn, release_fn, abort_fn;
6372 /* Emit code to perform this initialization but once. This code
6375 static <type> guard;
6376 if (!guard.first_byte) {
6377 if (__cxa_guard_acquire (&guard)) {
6380 // Do initialization.
6381 flag = true; __cxa_guard_release (&guard);
6382 // Register variable for destruction at end of program.
6384 if (!flag) __cxa_guard_abort (&guard);
6388 Note that the `flag' variable is only set to 1 *after* the
6389 initialization is complete. This ensures that an exception,
6390 thrown during the construction, will cause the variable to
6391 reinitialized when we pass through this code again, as per:
6395 If the initialization exits by throwing an exception, the
6396 initialization is not complete, so it will be tried again
6397 the next time control enters the declaration.
6399 This process should be thread-safe, too; multiple threads
6400 should not be able to initialize the variable more than
6403 /* Create the guard variable. */
6404 guard = get_guard (decl);
6406 /* This optimization isn't safe on targets with relaxed memory
6407 consistency. On such targets we force synchronization in
6408 __cxa_guard_acquire. */
6409 if (!targetm.relaxed_ordering || !flag_threadsafe_statics)
6411 /* Begin the conditional initialization. */
6412 if_stmt = begin_if_stmt ();
6413 finish_if_stmt_cond (get_guard_cond (guard), if_stmt);
6414 then_clause = begin_compound_stmt (BCS_NO_SCOPE);
6417 if (flag_threadsafe_statics)
6419 guard_addr = build_address (guard);
6421 acquire_fn = get_identifier ("__cxa_guard_acquire");
6422 release_fn = get_identifier ("__cxa_guard_release");
6423 abort_fn = get_identifier ("__cxa_guard_abort");
6424 if (!get_global_value_if_present (acquire_fn, &acquire_fn))
6426 tree argtypes = tree_cons (NULL_TREE, TREE_TYPE (guard_addr),
6428 tree vfntype = build_function_type (void_type_node, argtypes);
6429 acquire_fn = push_library_fn
6430 (acquire_fn, build_function_type (integer_type_node, argtypes),
6432 release_fn = push_library_fn (release_fn, vfntype, NULL_TREE);
6433 abort_fn = push_library_fn (abort_fn, vfntype, NULL_TREE);
6437 release_fn = identifier_global_value (release_fn);
6438 abort_fn = identifier_global_value (abort_fn);
6441 inner_if_stmt = begin_if_stmt ();
6442 finish_if_stmt_cond (build_call_n (acquire_fn, 1, guard_addr),
6445 inner_then_clause = begin_compound_stmt (BCS_NO_SCOPE);
6446 begin = get_target_expr (boolean_false_node);
6447 flag = TARGET_EXPR_SLOT (begin);
6449 TARGET_EXPR_CLEANUP (begin)
6450 = build3 (COND_EXPR, void_type_node, flag,
6452 build_call_n (abort_fn, 1, guard_addr));
6453 CLEANUP_EH_ONLY (begin) = 1;
6455 /* Do the initialization itself. */
6456 init = add_stmt_to_compound (begin, init);
6457 init = add_stmt_to_compound
6458 (init, build2 (MODIFY_EXPR, void_type_node, flag, boolean_true_node));
6459 init = add_stmt_to_compound
6460 (init, build_call_n (release_fn, 1, guard_addr));
6463 init = add_stmt_to_compound (init, set_guard (guard));
6465 /* Use atexit to register a function for destroying this static
6467 init = add_stmt_to_compound (init, register_dtor_fn (decl));
6469 finish_expr_stmt (init);
6471 if (flag_threadsafe_statics)
6473 finish_compound_stmt (inner_then_clause);
6474 finish_then_clause (inner_if_stmt);
6475 finish_if_stmt (inner_if_stmt);
6478 if (!targetm.relaxed_ordering || !flag_threadsafe_statics)
6480 finish_compound_stmt (then_clause);
6481 finish_then_clause (if_stmt);
6482 finish_if_stmt (if_stmt);
6486 static_aggregates = tree_cons (init, decl, static_aggregates);
6490 /* Make TYPE a complete type based on INITIAL_VALUE.
6491 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
6492 2 if there was no information (in which case assume 0 if DO_DEFAULT),
6493 3 if the initializer list is empty (in pedantic mode). */
6496 cp_complete_array_type (tree *ptype, tree initial_value, bool do_default)
6499 tree type, elt_type;
6503 unsigned HOST_WIDE_INT i;
6506 /* An array of character type can be initialized from a
6507 brace-enclosed string constant.
6509 FIXME: this code is duplicated from reshape_init. Probably
6510 we should just call reshape_init here? */
6511 if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (*ptype)))
6512 && TREE_CODE (initial_value) == CONSTRUCTOR
6513 && !VEC_empty (constructor_elt, CONSTRUCTOR_ELTS (initial_value)))
6515 VEC(constructor_elt,gc) *v = CONSTRUCTOR_ELTS (initial_value);
6516 tree value = VEC_index (constructor_elt, v, 0)->value;
6518 if (TREE_CODE (value) == STRING_CST
6519 && VEC_length (constructor_elt, v) == 1)
6520 initial_value = value;
6523 /* If any of the elements are parameter packs, we can't actually
6524 complete this type now because the array size is dependent. */
6525 if (TREE_CODE (initial_value) == CONSTRUCTOR)
6527 FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (initial_value),
6530 if (PACK_EXPANSION_P (value))
6536 failure = complete_array_type (ptype, initial_value, do_default);
6538 /* We can create the array before the element type is complete, which
6539 means that we didn't have these two bits set in the original type
6540 either. In completing the type, we are expected to propagate these
6541 bits. See also complete_type which does the same thing for arrays
6544 if (TYPE_DOMAIN (type))
6546 elt_type = TREE_TYPE (type);
6547 TYPE_NEEDS_CONSTRUCTING (type) = TYPE_NEEDS_CONSTRUCTING (elt_type);
6548 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type)
6549 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (elt_type);
6555 /* Return zero if something is declared to be a member of type
6556 CTYPE when in the context of CUR_TYPE. STRING is the error
6557 message to print in that case. Otherwise, quietly return 1. */
6560 member_function_or_else (tree ctype, tree cur_type, enum overload_flags flags)
6562 if (ctype && ctype != cur_type)
6564 if (flags == DTOR_FLAG)
6565 error ("destructor for alien class %qT cannot be a member", ctype);
6567 error ("constructor for alien class %qT cannot be a member", ctype);
6573 /* Subroutine of `grokdeclarator'. */
6575 /* Generate errors possibly applicable for a given set of specifiers.
6576 This is for ARM $7.1.2. */
6579 bad_specifiers (tree object,
6588 error ("%qD declared as a %<virtual%> %s", object, type);
6590 error ("%qD declared as an %<inline%> %s", object, type);
6592 error ("%<const%> and %<volatile%> function specifiers on "
6593 "%qD invalid in %s declaration",
6596 error ("%q+D declared as a friend", object);
6598 && (TREE_CODE (object) == TYPE_DECL
6599 || (!TYPE_PTRFN_P (TREE_TYPE (object))
6600 && !TYPE_REFFN_P (TREE_TYPE (object))
6601 && !TYPE_PTRMEMFUNC_P (TREE_TYPE (object)))))
6602 error ("%q+D declared with an exception specification", object);
6605 /* DECL is a member function or static data member and is presently
6606 being defined. Check that the definition is taking place in a
6610 check_class_member_definition_namespace (tree decl)
6612 /* These checks only apply to member functions and static data
6614 gcc_assert (TREE_CODE (decl) == FUNCTION_DECL
6615 || TREE_CODE (decl) == VAR_DECL);
6616 /* We check for problems with specializations in pt.c in
6617 check_specialization_namespace, where we can issue better
6619 if (processing_specialization)
6621 /* There are no restrictions on the placement of
6622 explicit instantiations. */
6623 if (processing_explicit_instantiation)
6627 A member function definition that appears outside of the
6628 class definition shall appear in a namespace scope enclosing
6629 the class definition.
6633 The definition for a static data member shall appear in a
6634 namespace scope enclosing the member's class definition. */
6635 if (!is_ancestor (current_namespace, DECL_CONTEXT (decl)))
6636 permerror (input_location, "definition of %qD is not in namespace enclosing %qT",
6637 decl, DECL_CONTEXT (decl));
6640 /* Build a PARM_DECL for the "this" parameter. TYPE is the
6641 METHOD_TYPE for a non-static member function; QUALS are the
6642 cv-qualifiers that apply to the function. */
6645 build_this_parm (tree type, cp_cv_quals quals)
6650 cp_cv_quals this_quals;
6652 this_type = TREE_VALUE (TYPE_ARG_TYPES (type));
6653 /* The `this' parameter is implicitly `const'; it cannot be
6655 this_quals = (quals & TYPE_QUAL_RESTRICT) | TYPE_QUAL_CONST;
6656 qual_type = cp_build_qualified_type (this_type, this_quals);
6657 parm = build_artificial_parm (this_identifier, qual_type);
6658 cp_apply_type_quals_to_decl (this_quals, parm);
6662 /* CTYPE is class type, or null if non-class.
6663 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
6665 DECLARATOR is the function's name.
6666 PARMS is a chain of PARM_DECLs for the function.
6667 VIRTUALP is truthvalue of whether the function is virtual or not.
6668 FLAGS are to be passed through to `grokclassfn'.
6669 QUALS are qualifiers indicating whether the function is `const'
6671 RAISES is a list of exceptions that this function can raise.
6672 CHECK is 1 if we must find this method in CTYPE, 0 if we should
6673 not look, and -1 if we should not call `grokclassfn' at all.
6675 SFK is the kind of special function (if any) for the new function.
6677 Returns `NULL_TREE' if something goes wrong, after issuing
6678 applicable error messages. */
6681 grokfndecl (tree ctype,
6685 tree orig_declarator,
6687 enum overload_flags flags,
6694 special_function_kind sfk,
6699 location_t location)
6702 int staticp = ctype && TREE_CODE (type) == FUNCTION_TYPE;
6706 type = build_exception_variant (type, raises);
6708 decl = build_lang_decl (FUNCTION_DECL, declarator, type);
6710 /* If we have an explicit location, use it, otherwise use whatever
6711 build_lang_decl used (probably input_location). */
6712 if (location != UNKNOWN_LOCATION)
6713 DECL_SOURCE_LOCATION (decl) = location;
6715 if (TREE_CODE (type) == METHOD_TYPE)
6718 parm = build_this_parm (type, quals);
6719 TREE_CHAIN (parm) = parms;
6722 DECL_ARGUMENTS (decl) = parms;
6723 for (t = parms; t; t = TREE_CHAIN (t))
6724 DECL_CONTEXT (t) = decl;
6725 /* Propagate volatile out from type to decl. */
6726 if (TYPE_VOLATILE (type))
6727 TREE_THIS_VOLATILE (decl) = 1;
6729 /* Setup decl according to sfk. */
6732 case sfk_constructor:
6733 case sfk_copy_constructor:
6734 case sfk_move_constructor:
6735 DECL_CONSTRUCTOR_P (decl) = 1;
6737 case sfk_destructor:
6738 DECL_DESTRUCTOR_P (decl) = 1;
6744 /* If pointers to member functions use the least significant bit to
6745 indicate whether a function is virtual, ensure a pointer
6746 to this function will have that bit clear. */
6747 if (TARGET_PTRMEMFUNC_VBIT_LOCATION == ptrmemfunc_vbit_in_pfn
6748 && TREE_CODE (type) == METHOD_TYPE
6749 && DECL_ALIGN (decl) < 2 * BITS_PER_UNIT)
6750 DECL_ALIGN (decl) = 2 * BITS_PER_UNIT;
6753 && TREE_CODE (orig_declarator) == TEMPLATE_ID_EXPR)
6757 ("defining explicit specialization %qD in friend declaration",
6761 tree fns = TREE_OPERAND (orig_declarator, 0);
6762 tree args = TREE_OPERAND (orig_declarator, 1);
6764 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
6766 /* Something like `template <class T> friend void f<T>()'. */
6767 error ("invalid use of template-id %qD in declaration "
6768 "of primary template",
6774 /* A friend declaration of the form friend void f<>(). Record
6775 the information in the TEMPLATE_ID_EXPR. */
6776 SET_DECL_IMPLICIT_INSTANTIATION (decl);
6778 if (TREE_CODE (fns) == COMPONENT_REF)
6780 /* Due to bison parser ickiness, we will have already looked
6781 up an operator_name or PFUNCNAME within the current class
6782 (see template_id in parse.y). If the current class contains
6783 such a name, we'll get a COMPONENT_REF here. Undo that. */
6785 gcc_assert (TREE_TYPE (TREE_OPERAND (fns, 0))
6786 == current_class_type);
6787 fns = TREE_OPERAND (fns, 1);
6789 gcc_assert (TREE_CODE (fns) == IDENTIFIER_NODE
6790 || TREE_CODE (fns) == OVERLOAD);
6791 DECL_TEMPLATE_INFO (decl) = build_template_info (fns, args);
6793 for (t = TYPE_ARG_TYPES (TREE_TYPE (decl)); t; t = TREE_CHAIN (t))
6794 if (TREE_PURPOSE (t)
6795 && TREE_CODE (TREE_PURPOSE (t)) == DEFAULT_ARG)
6797 error ("default arguments are not allowed in declaration "
6798 "of friend template specialization %qD",
6805 error ("%<inline%> is not allowed in declaration of friend "
6806 "template specialization %qD",
6813 /* If this decl has namespace scope, set that up. */
6815 set_decl_namespace (decl, in_namespace, friendp);
6817 DECL_CONTEXT (decl) = FROB_CONTEXT (current_decl_namespace ());
6819 /* `main' and builtins have implicit 'C' linkage. */
6820 if ((MAIN_NAME_P (declarator)
6821 || (IDENTIFIER_LENGTH (declarator) > 10
6822 && IDENTIFIER_POINTER (declarator)[0] == '_'
6823 && IDENTIFIER_POINTER (declarator)[1] == '_'
6824 && strncmp (IDENTIFIER_POINTER (declarator)+2, "builtin_", 8) == 0))
6825 && current_lang_name == lang_name_cplusplus
6826 && ctype == NULL_TREE
6827 /* NULL_TREE means global namespace. */
6828 && DECL_CONTEXT (decl) == NULL_TREE)
6829 SET_DECL_LANGUAGE (decl, lang_c);
6831 /* Should probably propagate const out from type to decl I bet (mrs). */
6834 DECL_STATIC_FUNCTION_P (decl) = 1;
6835 DECL_CONTEXT (decl) = ctype;
6840 DECL_CONTEXT (decl) = ctype;
6842 check_class_member_definition_namespace (decl);
6845 if (ctype == NULL_TREE && DECL_MAIN_P (decl))
6847 if (processing_template_decl)
6848 error ("cannot declare %<::main%> to be a template");
6850 error ("cannot declare %<::main%> to be inline");
6852 error ("cannot declare %<::main%> to be static");
6857 /* Members of anonymous types and local classes have no linkage; make
6858 them internal. If a typedef is made later, this will be changed. */
6859 if (ctype && (TYPE_ANONYMOUS_P (ctype)
6860 || decl_function_context (TYPE_MAIN_DECL (ctype))))
6863 if (publicp && cxx_dialect == cxx98)
6865 /* [basic.link]: A name with no linkage (notably, the name of a class
6866 or enumeration declared in a local scope) shall not be used to
6867 declare an entity with linkage.
6869 DR 757 relaxes this restriction for C++0x. */
6870 t = no_linkage_check (TREE_TYPE (decl),
6871 /*relaxed_p=*/false);
6874 if (TYPE_ANONYMOUS_P (t))
6876 if (DECL_EXTERN_C_P (decl))
6877 /* Allow this; it's pretty common in C. */;
6880 permerror (input_location, "anonymous type with no linkage "
6881 "used to declare function %q#D with linkage",
6883 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
6884 permerror (input_location, "%q+#D does not refer to the unqualified "
6885 "type, so it is not used for linkage",
6890 permerror (input_location, "type %qT with no linkage used to "
6891 "declare function %q#D with linkage", t, decl);
6895 TREE_PUBLIC (decl) = publicp;
6898 DECL_INTERFACE_KNOWN (decl) = 1;
6899 DECL_NOT_REALLY_EXTERN (decl) = 1;
6902 /* If the declaration was declared inline, mark it as such. */
6904 DECL_DECLARED_INLINE_P (decl) = 1;
6906 DECL_EXTERNAL (decl) = 1;
6907 if (quals && TREE_CODE (type) == FUNCTION_TYPE)
6910 ? G_("static member function %qD cannot have cv-qualifier")
6911 : G_("non-member function %qD cannot have cv-qualifier"),
6913 quals = TYPE_UNQUALIFIED;
6916 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl))
6917 && !grok_op_properties (decl, /*complain=*/true))
6921 /* Make the init_value nonzero so pushdecl knows this is not
6922 tentative. error_mark_node is replaced later with the BLOCK. */
6923 DECL_INITIAL (decl) = error_mark_node;
6925 if (TYPE_NOTHROW_P (type) || nothrow_libfn_p (decl))
6926 TREE_NOTHROW (decl) = 1;
6928 /* Caller will do the rest of this. */
6932 if (ctype != NULL_TREE)
6933 grokclassfn (ctype, decl, flags);
6935 decl = check_explicit_specialization (orig_declarator, decl,
6938 4 * (friendp != 0));
6939 if (decl == error_mark_node)
6944 cplus_decl_attributes (&decl, *attrlist, 0);
6945 *attrlist = NULL_TREE;
6948 /* Check main's type after attributes have been applied. */
6949 if (ctype == NULL_TREE && DECL_MAIN_P (decl))
6951 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl)),
6954 tree oldtypeargs = TYPE_ARG_TYPES (TREE_TYPE (decl));
6956 error ("%<::main%> must return %<int%>");
6957 newtype = build_function_type (integer_type_node, oldtypeargs);
6958 TREE_TYPE (decl) = newtype;
6961 check_main_parameter_types (decl);
6964 if (ctype != NULL_TREE
6965 && (! TYPE_FOR_JAVA (ctype) || check_java_method (decl))
6968 tree old_decl = check_classfn (ctype, decl,
6969 (processing_template_decl
6970 > template_class_depth (ctype))
6971 ? current_template_parms
6974 if (old_decl == error_mark_node)
6982 if (TREE_CODE (old_decl) == TEMPLATE_DECL)
6983 /* Because grokfndecl is always supposed to return a
6984 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
6985 here. We depend on our callers to figure out that its
6986 really a template that's being returned. */
6987 old_decl = DECL_TEMPLATE_RESULT (old_decl);
6989 if (DECL_STATIC_FUNCTION_P (old_decl)
6990 && TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE)
6991 /* Remove the `this' parm added by grokclassfn.
6992 XXX Isn't this done in start_function, too? */
6993 revert_static_member_fn (decl);
6994 if (DECL_ARTIFICIAL (old_decl))
6996 error ("definition of implicitly-declared %qD", old_decl);
7000 /* Since we've smashed OLD_DECL to its
7001 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
7002 if (TREE_CODE (decl) == TEMPLATE_DECL)
7003 decl = DECL_TEMPLATE_RESULT (decl);
7005 /* Attempt to merge the declarations. This can fail, in
7006 the case of some invalid specialization declarations. */
7007 pushed_scope = push_scope (ctype);
7008 ok = duplicate_decls (decl, old_decl, friendp);
7010 pop_scope (pushed_scope);
7013 error ("no %q#D member function declared in class %qT",
7021 if (DECL_CONSTRUCTOR_P (decl) && !grok_ctor_properties (ctype, decl))
7024 if (ctype == NULL_TREE || check)
7028 DECL_VIRTUAL_P (decl) = 1;
7033 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
7034 the linkage that DECL will receive in the object file. */
7037 set_linkage_for_static_data_member (tree decl)
7039 /* A static data member always has static storage duration and
7040 external linkage. Note that static data members are forbidden in
7041 local classes -- the only situation in which a class has
7042 non-external linkage. */
7043 TREE_PUBLIC (decl) = 1;
7044 TREE_STATIC (decl) = 1;
7045 /* For non-template classes, static data members are always put
7046 out in exactly those files where they are defined, just as
7047 with ordinary namespace-scope variables. */
7048 if (!processing_template_decl)
7049 DECL_INTERFACE_KNOWN (decl) = 1;
7052 /* Create a VAR_DECL named NAME with the indicated TYPE.
7054 If SCOPE is non-NULL, it is the class type or namespace containing
7055 the variable. If SCOPE is NULL, the variable should is created in
7056 the innermost enclosings scope. */
7059 grokvardecl (tree type,
7061 const cp_decl_specifier_seq *declspecs,
7067 tree explicit_scope;
7069 gcc_assert (!name || TREE_CODE (name) == IDENTIFIER_NODE);
7071 /* Compute the scope in which to place the variable, but remember
7072 whether or not that scope was explicitly specified by the user. */
7073 explicit_scope = scope;
7076 /* An explicit "extern" specifier indicates a namespace-scope
7078 if (declspecs->storage_class == sc_extern)
7079 scope = current_decl_namespace ();
7080 else if (!at_function_scope_p ())
7081 scope = current_scope ();
7085 && (/* If the variable is a namespace-scope variable declared in a
7086 template, we need DECL_LANG_SPECIFIC. */
7087 (TREE_CODE (scope) == NAMESPACE_DECL && processing_template_decl)
7088 /* Similarly for namespace-scope variables with language linkage
7090 || (TREE_CODE (scope) == NAMESPACE_DECL
7091 && current_lang_name != lang_name_cplusplus)
7092 /* Similarly for static data members. */
7094 decl = build_lang_decl (VAR_DECL, name, type);
7096 decl = build_decl (input_location, VAR_DECL, name, type);
7098 if (explicit_scope && TREE_CODE (explicit_scope) == NAMESPACE_DECL)
7099 set_decl_namespace (decl, explicit_scope, 0);
7101 DECL_CONTEXT (decl) = FROB_CONTEXT (scope);
7103 if (declspecs->storage_class == sc_extern)
7105 DECL_THIS_EXTERN (decl) = 1;
7106 DECL_EXTERNAL (decl) = !initialized;
7109 if (DECL_CLASS_SCOPE_P (decl))
7111 set_linkage_for_static_data_member (decl);
7112 /* This function is only called with out-of-class definitions. */
7113 DECL_EXTERNAL (decl) = 0;
7114 check_class_member_definition_namespace (decl);
7116 /* At top level, either `static' or no s.c. makes a definition
7117 (perhaps tentative), and absence of `static' makes it public. */
7118 else if (toplevel_bindings_p ())
7120 TREE_PUBLIC (decl) = (declspecs->storage_class != sc_static
7121 && (DECL_THIS_EXTERN (decl) || ! constp));
7122 TREE_STATIC (decl) = ! DECL_EXTERNAL (decl);
7124 /* Not at top level, only `static' makes a static definition. */
7127 TREE_STATIC (decl) = declspecs->storage_class == sc_static;
7128 TREE_PUBLIC (decl) = DECL_EXTERNAL (decl);
7131 if (declspecs->specs[(int)ds_thread])
7132 DECL_TLS_MODEL (decl) = decl_default_tls_model (decl);
7134 /* If the type of the decl has no linkage, make sure that we'll
7135 notice that in mark_used. */
7136 if (cxx_dialect > cxx98
7137 && decl_linkage (decl) != lk_none
7138 && DECL_LANG_SPECIFIC (decl) == NULL
7139 && !DECL_EXTERN_C_P (decl)
7140 && no_linkage_check (TREE_TYPE (decl), /*relaxed_p=*/false))
7141 retrofit_lang_decl (decl);
7143 if (TREE_PUBLIC (decl))
7145 /* [basic.link]: A name with no linkage (notably, the name of a class
7146 or enumeration declared in a local scope) shall not be used to
7147 declare an entity with linkage.
7149 DR 757 relaxes this restriction for C++0x. */
7150 tree t = (cxx_dialect > cxx98 ? NULL_TREE
7151 : no_linkage_check (TREE_TYPE (decl), /*relaxed_p=*/false));
7154 if (TYPE_ANONYMOUS_P (t))
7156 if (DECL_EXTERN_C_P (decl))
7157 /* Allow this; it's pretty common in C. */
7161 /* DRs 132, 319 and 389 seem to indicate types with
7162 no linkage can only be used to declare extern "C"
7163 entities. Since it's not always an error in the
7164 ISO C++ 90 Standard, we only issue a warning. */
7165 warning (0, "anonymous type with no linkage used to declare "
7166 "variable %q#D with linkage", decl);
7167 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
7168 warning (0, "%q+#D does not refer to the unqualified "
7169 "type, so it is not used for linkage",
7174 warning (0, "type %qT with no linkage used to declare variable "
7175 "%q#D with linkage", t, decl);
7179 DECL_INTERFACE_KNOWN (decl) = 1;
7184 /* Create and return a canonical pointer to member function type, for
7185 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
7188 build_ptrmemfunc_type (tree type)
7192 tree unqualified_variant = NULL_TREE;
7194 if (type == error_mark_node)
7197 /* If a canonical type already exists for this type, use it. We use
7198 this method instead of type_hash_canon, because it only does a
7199 simple equality check on the list of field members. */
7201 if ((t = TYPE_GET_PTRMEMFUNC_TYPE (type)))
7204 /* Make sure that we always have the unqualified pointer-to-member
7206 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
7208 = build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type));
7210 t = make_class_type (RECORD_TYPE);
7211 xref_basetypes (t, NULL_TREE);
7213 /* Let the front end know this is a pointer to member function... */
7214 TYPE_PTRMEMFUNC_FLAG (t) = 1;
7215 /* ... and not really a class type. */
7216 SET_CLASS_TYPE_P (t, 0);
7218 field = build_decl (input_location, FIELD_DECL, pfn_identifier, type);
7221 field = build_decl (input_location, FIELD_DECL, delta_identifier,
7223 TREE_CHAIN (field) = fields;
7226 finish_builtin_struct (t, "__ptrmemfunc_type", fields, ptr_type_node);
7228 /* Zap out the name so that the back end will give us the debugging
7229 information for this anonymous RECORD_TYPE. */
7230 TYPE_NAME (t) = NULL_TREE;
7232 /* If this is not the unqualified form of this pointer-to-member
7233 type, set the TYPE_MAIN_VARIANT for this type to be the
7234 unqualified type. Since they are actually RECORD_TYPEs that are
7235 not variants of each other, we must do this manually.
7236 As we just built a new type there is no need to do yet another copy. */
7237 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
7239 int type_quals = cp_type_quals (type);
7240 TYPE_READONLY (t) = (type_quals & TYPE_QUAL_CONST) != 0;
7241 TYPE_VOLATILE (t) = (type_quals & TYPE_QUAL_VOLATILE) != 0;
7242 TYPE_RESTRICT (t) = (type_quals & TYPE_QUAL_RESTRICT) != 0;
7243 TYPE_MAIN_VARIANT (t) = unqualified_variant;
7244 TYPE_NEXT_VARIANT (t) = TYPE_NEXT_VARIANT (unqualified_variant);
7245 TYPE_NEXT_VARIANT (unqualified_variant) = t;
7246 TREE_TYPE (TYPE_BINFO (t)) = t;
7249 /* Cache this pointer-to-member type so that we can find it again
7251 TYPE_SET_PTRMEMFUNC_TYPE (type, t);
7253 if (TYPE_STRUCTURAL_EQUALITY_P (type))
7254 SET_TYPE_STRUCTURAL_EQUALITY (t);
7255 else if (TYPE_CANONICAL (type) != type)
7256 TYPE_CANONICAL (t) = build_ptrmemfunc_type (TYPE_CANONICAL (type));
7261 /* Create and return a pointer to data member type. */
7264 build_ptrmem_type (tree class_type, tree member_type)
7266 if (TREE_CODE (member_type) == METHOD_TYPE)
7268 cp_cv_quals quals = type_memfn_quals (member_type);
7269 member_type = build_memfn_type (member_type, class_type, quals);
7270 return build_ptrmemfunc_type (build_pointer_type (member_type));
7274 gcc_assert (TREE_CODE (member_type) != FUNCTION_TYPE);
7275 return build_offset_type (class_type, member_type);
7279 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
7280 Check to see that the definition is valid. Issue appropriate error
7281 messages. Return 1 if the definition is particularly bad, or 0
7285 check_static_variable_definition (tree decl, tree type)
7287 /* Motion 10 at San Diego: If a static const integral data member is
7288 initialized with an integral constant expression, the initializer
7289 may appear either in the declaration (within the class), or in
7290 the definition, but not both. If it appears in the class, the
7291 member is a member constant. The file-scope definition is always
7293 if (!ARITHMETIC_TYPE_P (type) && TREE_CODE (type) != ENUMERAL_TYPE)
7295 error ("invalid in-class initialization of static data member "
7296 "of non-integral type %qT",
7298 /* If we just return the declaration, crashes will sometimes
7299 occur. We therefore return void_type_node, as if this were a
7300 friend declaration, to cause callers to completely ignore
7301 this declaration. */
7304 else if (!CP_TYPE_CONST_P (type))
7305 error ("ISO C++ forbids in-class initialization of non-const "
7306 "static member %qD",
7308 else if (!INTEGRAL_OR_ENUMERATION_TYPE_P (type))
7309 pedwarn (input_location, OPT_pedantic, "ISO C++ forbids initialization of member constant "
7310 "%qD of non-integral type %qT", decl, type);
7315 /* Given the SIZE (i.e., number of elements) in an array, compute an
7316 appropriate index type for the array. If non-NULL, NAME is the
7317 name of the thing being declared. */
7320 compute_array_index_type (tree name, tree size)
7324 tree abi_1_itype = NULL_TREE;
7326 if (error_operand_p (size))
7327 return error_mark_node;
7329 type = TREE_TYPE (size);
7330 /* The array bound must be an integer type. */
7331 if (!dependent_type_p (type) && !INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type))
7334 error ("size of array %qD has non-integral type %qT", name, type);
7336 error ("size of array has non-integral type %qT", type);
7337 size = integer_one_node;
7338 type = TREE_TYPE (size);
7341 /* We can only call value_dependent_expression_p on integral constant
7342 expressions; the parser adds a dummy NOP_EXPR with TREE_SIDE_EFFECTS
7343 set if this isn't one. */
7344 if (processing_template_decl
7345 && (TREE_SIDE_EFFECTS (size) || value_dependent_expression_p (size)))
7347 /* We cannot do any checking for a SIZE that isn't known to be
7348 constant. Just build the index type and mark that it requires
7349 structural equality checks. */
7350 itype = build_index_type (build_min (MINUS_EXPR, sizetype,
7351 size, integer_one_node));
7352 TYPE_DEPENDENT_P (itype) = 1;
7353 TYPE_DEPENDENT_P_VALID (itype) = 1;
7354 SET_TYPE_STRUCTURAL_EQUALITY (itype);
7358 if (!abi_version_at_least (2) && processing_template_decl)
7359 /* For abi-1, we handled all instances in templates the same way,
7360 even when they were non-dependent. This affects the manglings
7361 produced. So, we do the normal checking for non-dependent
7362 sizes, but at the end we'll return the same type that abi-1
7363 would have, but with TYPE_CANONICAL set to the "right"
7364 value that the current ABI would provide. */
7365 abi_1_itype = build_index_type (build_min (MINUS_EXPR, sizetype,
7366 size, integer_one_node));
7368 /* The size might be the result of a cast. */
7369 STRIP_TYPE_NOPS (size);
7371 size = mark_rvalue_use (size);
7373 /* It might be a const variable or enumeration constant. */
7374 size = integral_constant_value (size);
7375 if (error_operand_p (size))
7376 return error_mark_node;
7378 /* Normally, the array-bound will be a constant. */
7379 if (TREE_CODE (size) == INTEGER_CST)
7381 /* Check to see if the array bound overflowed. Make that an
7382 error, no matter how generous we're being. */
7383 constant_expression_error (size);
7385 /* An array must have a positive number of elements. */
7386 if (INT_CST_LT (size, integer_zero_node))
7389 error ("size of array %qD is negative", name);
7391 error ("size of array is negative");
7392 size = integer_one_node;
7394 /* As an extension we allow zero-sized arrays. We always allow
7395 them in system headers because glibc uses them. */
7396 else if (integer_zerop (size) && !in_system_header)
7399 pedwarn (input_location, OPT_pedantic, "ISO C++ forbids zero-size array %qD", name);
7401 pedwarn (input_location, OPT_pedantic, "ISO C++ forbids zero-size array");
7404 else if (TREE_CONSTANT (size))
7406 /* `(int) &fn' is not a valid array bound. */
7408 error ("size of array %qD is not an integral constant-expression",
7411 error ("size of array is not an integral constant-expression");
7412 size = integer_one_node;
7414 else if (pedantic && warn_vla != 0)
7417 pedwarn (input_location, OPT_Wvla, "ISO C++ forbids variable length array %qD", name);
7419 pedwarn (input_location, OPT_Wvla, "ISO C++ forbids variable length array");
7421 else if (warn_vla > 0)
7425 "variable length array %qD is used", name);
7428 "variable length array is used");
7431 if (processing_template_decl && !TREE_CONSTANT (size))
7432 /* A variable sized array. */
7433 itype = build_min (MINUS_EXPR, sizetype, size, integer_one_node);
7436 HOST_WIDE_INT saved_processing_template_decl;
7438 /* Compute the index of the largest element in the array. It is
7439 one less than the number of elements in the array. We save
7440 and restore PROCESSING_TEMPLATE_DECL so that computations in
7441 cp_build_binary_op will be appropriately folded. */
7442 saved_processing_template_decl = processing_template_decl;
7443 processing_template_decl = 0;
7444 itype = cp_build_binary_op (input_location,
7446 cp_convert (ssizetype, size),
7447 cp_convert (ssizetype, integer_one_node),
7448 tf_warning_or_error);
7449 itype = fold (itype);
7450 processing_template_decl = saved_processing_template_decl;
7452 if (!TREE_CONSTANT (itype))
7453 /* A variable sized array. */
7454 itype = variable_size (itype);
7455 /* Make sure that there was no overflow when creating to a signed
7456 index type. (For example, on a 32-bit machine, an array with
7457 size 2^32 - 1 is too big.) */
7458 else if (TREE_CODE (itype) == INTEGER_CST
7459 && TREE_OVERFLOW (itype))
7461 error ("overflow in array dimension");
7462 TREE_OVERFLOW (itype) = 0;
7466 /* Create and return the appropriate index type. */
7469 tree t = build_index_type (itype);
7470 TYPE_CANONICAL (abi_1_itype) = TYPE_CANONICAL (t);
7474 return build_index_type (itype);
7477 /* Returns the scope (if any) in which the entity declared by
7478 DECLARATOR will be located. If the entity was declared with an
7479 unqualified name, NULL_TREE is returned. */
7482 get_scope_of_declarator (const cp_declarator *declarator)
7484 while (declarator && declarator->kind != cdk_id)
7485 declarator = declarator->declarator;
7487 /* If the declarator-id is a SCOPE_REF, the scope in which the
7488 declaration occurs is the first operand. */
7490 && declarator->u.id.qualifying_scope)
7491 return declarator->u.id.qualifying_scope;
7493 /* Otherwise, the declarator is not a qualified name; the entity will
7494 be declared in the current scope. */
7498 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
7499 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
7503 create_array_type_for_decl (tree name, tree type, tree size)
7505 tree itype = NULL_TREE;
7507 /* If things have already gone awry, bail now. */
7508 if (type == error_mark_node || size == error_mark_node)
7509 return error_mark_node;
7511 /* If there are some types which cannot be array elements,
7512 issue an error-message and return. */
7513 switch (TREE_CODE (type))
7517 error ("declaration of %qD as array of void", name);
7519 error ("creating array of void");
7520 return error_mark_node;
7524 error ("declaration of %qD as array of functions", name);
7526 error ("creating array of functions");
7527 return error_mark_node;
7529 case REFERENCE_TYPE:
7531 error ("declaration of %qD as array of references", name);
7533 error ("creating array of references");
7534 return error_mark_node;
7538 error ("declaration of %qD as array of function members", name);
7540 error ("creating array of function members");
7541 return error_mark_node;
7549 The constant expressions that specify the bounds of the arrays
7550 can be omitted only for the first member of the sequence. */
7551 if (TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type))
7554 error ("declaration of %qD as multidimensional array must "
7555 "have bounds for all dimensions except the first",
7558 error ("multidimensional array must have bounds for all "
7559 "dimensions except the first");
7561 return error_mark_node;
7564 /* Figure out the index type for the array. */
7566 itype = compute_array_index_type (name, size);
7569 T is called the array element type; this type shall not be [...] an
7570 abstract class type. */
7571 abstract_virtuals_error (name, type);
7573 return build_cplus_array_type (type, itype);
7576 /* Check that it's OK to declare a function with the indicated TYPE.
7577 SFK indicates the kind of special function (if any) that this
7578 function is. OPTYPE is the type given in a conversion operator
7579 declaration, or the class type for a constructor/destructor.
7580 Returns the actual return type of the function; that
7581 may be different than TYPE if an error occurs, or for certain
7582 special functions. */
7585 check_special_function_return_type (special_function_kind sfk,
7591 case sfk_constructor:
7593 error ("return type specification for constructor invalid");
7595 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
7596 type = build_pointer_type (optype);
7598 type = void_type_node;
7601 case sfk_destructor:
7603 error ("return type specification for destructor invalid");
7604 /* We can't use the proper return type here because we run into
7605 problems with ambiguous bases and covariant returns.
7606 Java classes are left unchanged because (void *) isn't a valid
7607 Java type, and we don't want to change the Java ABI. */
7608 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
7609 type = build_pointer_type (void_type_node);
7611 type = void_type_node;
7614 case sfk_conversion:
7616 error ("return type specified for %<operator %T%>", optype);
7627 /* A variable or data member (whose unqualified name is IDENTIFIER)
7628 has been declared with the indicated TYPE. If the TYPE is not
7629 acceptable, issue an error message and return a type to use for
7630 error-recovery purposes. */
7633 check_var_type (tree identifier, tree type)
7635 if (VOID_TYPE_P (type))
7638 error ("unnamed variable or field declared void");
7639 else if (TREE_CODE (identifier) == IDENTIFIER_NODE)
7641 gcc_assert (!IDENTIFIER_OPNAME_P (identifier));
7642 error ("variable or field %qE declared void", identifier);
7645 error ("variable or field declared void");
7646 type = error_mark_node;
7652 /* Given declspecs and a declarator (abstract or otherwise), determine
7653 the name and type of the object declared and construct a DECL node
7656 DECLSPECS points to the representation of declaration-specifier
7657 sequence that precedes declarator.
7659 DECL_CONTEXT says which syntactic context this declaration is in:
7660 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
7661 FUNCDEF for a function definition. Like NORMAL but a few different
7662 error messages in each case. Return value may be zero meaning
7663 this definition is too screwy to try to parse.
7664 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
7665 handle member functions (which have FIELD context).
7666 Return value may be zero meaning this definition is too screwy to
7668 PARM for a parameter declaration (either within a function prototype
7669 or before a function body). Make a PARM_DECL, or return void_type_node.
7670 TPARM for a template parameter declaration.
7671 CATCHPARM for a parameter declaration before a catch clause.
7672 TYPENAME if for a typename (in a cast or sizeof).
7673 Don't make a DECL node; just return the ..._TYPE node.
7674 FIELD for a struct or union field; make a FIELD_DECL.
7675 BITFIELD for a field with specified width.
7677 INITIALIZED is as for start_decl.
7679 ATTRLIST is a pointer to the list of attributes, which may be NULL
7680 if there are none; *ATTRLIST may be modified if attributes from inside
7681 the declarator should be applied to the declaration.
7683 When this function is called, scoping variables (such as
7684 CURRENT_CLASS_TYPE) should reflect the scope in which the
7685 declaration occurs, not the scope in which the new declaration will
7686 be placed. For example, on:
7690 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
7693 Returns a DECL (if a declarator is present), a TYPE (if there is no
7694 declarator, in cases like "struct S;"), or the ERROR_MARK_NODE if an
7698 grokdeclarator (const cp_declarator *declarator,
7699 const cp_decl_specifier_seq *declspecs,
7700 enum decl_context decl_context,
7704 tree type = NULL_TREE;
7706 int virtualp, explicitp, friendp, inlinep, staticp;
7707 int explicit_int = 0;
7708 int explicit_char = 0;
7709 int defaulted_int = 0;
7710 tree dependent_name = NULL_TREE;
7712 tree typedef_decl = NULL_TREE;
7713 const char *name = NULL;
7714 tree typedef_type = NULL_TREE;
7715 /* True if this declarator is a function definition. */
7716 bool funcdef_flag = false;
7717 cp_declarator_kind innermost_code = cdk_error;
7720 /* See the code below that used this. */
7721 tree decl_attr = NULL_TREE;
7724 /* Keep track of what sort of function is being processed
7725 so that we can warn about default return values, or explicit
7726 return values which do not match prescribed defaults. */
7727 special_function_kind sfk = sfk_none;
7729 tree dname = NULL_TREE;
7730 tree ctor_return_type = NULL_TREE;
7731 enum overload_flags flags = NO_SPECIAL;
7732 /* cv-qualifiers that apply to the declarator, for a declaration of
7733 a member function. */
7734 cp_cv_quals memfn_quals = TYPE_UNQUALIFIED;
7735 /* cv-qualifiers that apply to the type specified by the DECLSPECS. */
7737 tree raises = NULL_TREE;
7738 int template_count = 0;
7739 tree returned_attrs = NULL_TREE;
7740 tree parms = NULL_TREE;
7741 const cp_declarator *id_declarator;
7742 /* The unqualified name of the declarator; either an
7743 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
7744 tree unqualified_id;
7745 /* The class type, if any, in which this entity is located,
7746 or NULL_TREE if none. Note that this value may be different from
7747 the current class type; for example if an attempt is made to declare
7748 "A::f" inside "B", this value will be "A". */
7749 tree ctype = current_class_type;
7750 /* The NAMESPACE_DECL for the namespace in which this entity is
7751 located. If an unqualified name is used to declare the entity,
7752 this value will be NULL_TREE, even if the entity is located at
7754 tree in_namespace = NULL_TREE;
7755 cp_storage_class storage_class;
7756 bool unsigned_p, signed_p, short_p, long_p, thread_p;
7757 bool type_was_error_mark_node = false;
7758 bool parameter_pack_p = declarator? declarator->parameter_pack_p : false;
7759 bool template_type_arg = false;
7760 bool template_parm_flag = false;
7761 bool constexpr_p = declspecs->specs[(int) ds_constexpr];
7764 signed_p = declspecs->specs[(int)ds_signed];
7765 unsigned_p = declspecs->specs[(int)ds_unsigned];
7766 short_p = declspecs->specs[(int)ds_short];
7767 long_p = declspecs->specs[(int)ds_long];
7768 longlong = declspecs->specs[(int)ds_long] >= 2;
7769 thread_p = declspecs->specs[(int)ds_thread];
7771 if (decl_context == FUNCDEF)
7772 funcdef_flag = true, decl_context = NORMAL;
7773 else if (decl_context == MEMFUNCDEF)
7774 funcdef_flag = true, decl_context = FIELD;
7775 else if (decl_context == BITFIELD)
7776 bitfield = 1, decl_context = FIELD;
7777 else if (decl_context == TEMPLATE_TYPE_ARG)
7778 template_type_arg = true, decl_context = TYPENAME;
7779 else if (decl_context == TPARM)
7780 template_parm_flag = true, decl_context = PARM;
7782 if (initialized > 1)
7783 funcdef_flag = true;
7785 /* Look inside a declarator for the name being declared
7786 and get it as a string, for an error message. */
7787 for (id_declarator = declarator;
7789 id_declarator = id_declarator->declarator)
7791 if (id_declarator->kind != cdk_id)
7792 innermost_code = id_declarator->kind;
7794 switch (id_declarator->kind)
7797 if (id_declarator->declarator
7798 && id_declarator->declarator->kind == cdk_id)
7800 sfk = id_declarator->declarator->u.id.sfk;
7801 if (sfk == sfk_destructor)
7808 tree qualifying_scope = id_declarator->u.id.qualifying_scope;
7809 tree decl = id_declarator->u.id.unqualified_name;
7812 if (qualifying_scope)
7814 if (at_function_scope_p ())
7818 A declarator-id shall not be qualified except
7821 None of the cases are permitted in block
7823 if (qualifying_scope == global_namespace)
7824 error ("invalid use of qualified-name %<::%D%>",
7826 else if (TYPE_P (qualifying_scope))
7827 error ("invalid use of qualified-name %<%T::%D%>",
7828 qualifying_scope, decl);
7830 error ("invalid use of qualified-name %<%D::%D%>",
7831 qualifying_scope, decl);
7832 return error_mark_node;
7834 else if (TYPE_P (qualifying_scope))
7836 ctype = qualifying_scope;
7837 if (innermost_code != cdk_function
7838 && current_class_type
7839 && !UNIQUELY_DERIVED_FROM_P (ctype,
7840 current_class_type))
7842 error ("type %qT is not derived from type %qT",
7843 ctype, current_class_type);
7844 return error_mark_node;
7847 else if (TREE_CODE (qualifying_scope) == NAMESPACE_DECL)
7848 in_namespace = qualifying_scope;
7850 switch (TREE_CODE (decl))
7856 if (innermost_code != cdk_function)
7858 error ("declaration of %qD as non-function", decl);
7859 return error_mark_node;
7861 else if (!qualifying_scope
7862 && !(current_class_type && at_class_scope_p ()))
7864 error ("declaration of %qD as non-member", decl);
7865 return error_mark_node;
7868 type = TREE_OPERAND (decl, 0);
7870 type = constructor_name (type);
7871 name = identifier_to_locale (IDENTIFIER_POINTER (type));
7876 case TEMPLATE_ID_EXPR:
7878 tree fns = TREE_OPERAND (decl, 0);
7881 if (TREE_CODE (dname) != IDENTIFIER_NODE)
7883 gcc_assert (is_overloaded_fn (dname));
7884 dname = DECL_NAME (get_first_fn (dname));
7889 case IDENTIFIER_NODE:
7890 if (TREE_CODE (decl) == IDENTIFIER_NODE)
7893 if (C_IS_RESERVED_WORD (dname))
7895 error ("declarator-id missing; using reserved word %qD",
7897 name = identifier_to_locale (IDENTIFIER_POINTER (dname));
7899 else if (!IDENTIFIER_TYPENAME_P (dname))
7900 name = identifier_to_locale (IDENTIFIER_POINTER (dname));
7903 gcc_assert (flags == NO_SPECIAL);
7904 flags = TYPENAME_FLAG;
7905 ctor_return_type = TREE_TYPE (dname);
7906 sfk = sfk_conversion;
7907 if (is_typename_at_global_scope (dname))
7908 name = identifier_to_locale (IDENTIFIER_POINTER (dname));
7910 name = "<invalid operator>";
7927 return error_mark_node;
7932 if (id_declarator->kind == cdk_id)
7938 The declarator in a function-definition shall have the form
7939 D1 ( parameter-declaration-clause) ... */
7940 if (funcdef_flag && innermost_code != cdk_function)
7942 error ("function definition does not declare parameters");
7943 return error_mark_node;
7946 if (((dname && IDENTIFIER_OPNAME_P (dname)) || flags == TYPENAME_FLAG)
7947 && innermost_code != cdk_function
7948 && ! (ctype && !declspecs->any_specifiers_p))
7950 error ("declaration of %qD as non-function", dname);
7951 return error_mark_node;
7954 /* Anything declared one level down from the top level
7955 must be one of the parameters of a function
7956 (because the body is at least two levels down). */
7958 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
7959 by not allowing C++ class definitions to specify their parameters
7960 with xdecls (must be spec.d in the parmlist).
7962 Since we now wait to push a class scope until we are sure that
7963 we are in a legitimate method context, we must set oldcname
7964 explicitly (since current_class_name is not yet alive).
7966 We also want to avoid calling this a PARM if it is in a namespace. */
7968 if (decl_context == NORMAL && !toplevel_bindings_p ())
7970 struct cp_binding_level *b = current_binding_level;
7971 current_binding_level = b->level_chain;
7972 if (current_binding_level != 0 && toplevel_bindings_p ())
7973 decl_context = PARM;
7974 current_binding_level = b;
7978 name = decl_context == PARM ? "parameter" : "type name";
7980 /* If there were multiple types specified in the decl-specifier-seq,
7981 issue an error message. */
7982 if (declspecs->multiple_types_p)
7984 error ("two or more data types in declaration of %qs", name);
7985 return error_mark_node;
7988 if (declspecs->conflicting_specifiers_p)
7990 error ("conflicting specifiers in declaration of %qs", name);
7991 return error_mark_node;
7994 /* Extract the basic type from the decl-specifier-seq. */
7995 type = declspecs->type;
7996 if (type == error_mark_node)
7999 type_was_error_mark_node = true;
8001 /* If the entire declaration is itself tagged as deprecated then
8002 suppress reports of deprecated items. */
8003 if (type && TREE_DEPRECATED (type)
8004 && deprecated_state != DEPRECATED_SUPPRESS)
8005 warn_deprecated_use (type, NULL_TREE);
8006 if (type && TREE_CODE (type) == TYPE_DECL)
8008 typedef_decl = type;
8009 type = TREE_TYPE (typedef_decl);
8010 if (TREE_DEPRECATED (type)
8011 && DECL_ARTIFICIAL (typedef_decl)
8012 && deprecated_state != DEPRECATED_SUPPRESS)
8013 warn_deprecated_use (type, NULL_TREE);
8015 /* No type at all: default to `int', and set DEFAULTED_INT
8016 because it was not a user-defined typedef. */
8017 if (type == NULL_TREE && (signed_p || unsigned_p || long_p || short_p))
8019 /* These imply 'int'. */
8020 type = integer_type_node;
8024 explicit_int = declspecs->explicit_int_p;
8025 explicit_char = declspecs->explicit_char_p;
8028 /* See the code below that used this. */
8030 decl_attr = DECL_ATTRIBUTES (typedef_decl);
8032 typedef_type = type;
8035 if (sfk != sfk_conversion)
8036 ctor_return_type = ctype;
8038 if (sfk != sfk_none)
8039 type = check_special_function_return_type (sfk, type,
8041 else if (type == NULL_TREE)
8047 /* We handle `main' specially here, because 'main () { }' is so
8048 common. With no options, it is allowed. With -Wreturn-type,
8049 it is a warning. It is only an error with -pedantic-errors. */
8050 is_main = (funcdef_flag
8051 && dname && MAIN_NAME_P (dname)
8052 && ctype == NULL_TREE
8053 && in_namespace == NULL_TREE
8054 && current_namespace == global_namespace);
8056 if (type_was_error_mark_node)
8057 /* We've already issued an error, don't complain more. */;
8058 else if (in_system_header || flag_ms_extensions)
8059 /* Allow it, sigh. */;
8061 permerror (input_location, "ISO C++ forbids declaration of %qs with no type", name);
8063 pedwarn (input_location, OPT_pedantic,
8064 "ISO C++ forbids declaration of %qs with no type", name);
8066 warning (OPT_Wreturn_type,
8067 "ISO C++ forbids declaration of %qs with no type", name);
8069 type = integer_type_node;
8074 /* Now process the modifiers that were specified
8075 and check for invalid combinations. */
8077 /* Long double is a special combination. */
8078 if (long_p && !longlong && TYPE_MAIN_VARIANT (type) == double_type_node)
8081 type = cp_build_qualified_type (long_double_type_node,
8082 cp_type_quals (type));
8085 /* Check all other uses of type modifiers. */
8087 if (unsigned_p || signed_p || long_p || short_p)
8091 if ((signed_p || unsigned_p) && TREE_CODE (type) != INTEGER_TYPE)
8092 error ("%<signed%> or %<unsigned%> invalid for %qs", name);
8093 else if (signed_p && unsigned_p)
8094 error ("%<signed%> and %<unsigned%> specified together for %qs", name);
8095 else if (longlong && TREE_CODE (type) != INTEGER_TYPE)
8096 error ("%<long long%> invalid for %qs", name);
8097 else if (long_p && TREE_CODE (type) == REAL_TYPE)
8098 error ("%<long%> invalid for %qs", name);
8099 else if (short_p && TREE_CODE (type) == REAL_TYPE)
8100 error ("%<short%> invalid for %qs", name);
8101 else if ((long_p || short_p) && TREE_CODE (type) != INTEGER_TYPE)
8102 error ("%<long%> or %<short%> invalid for %qs", name);
8103 else if ((long_p || short_p) && explicit_char)
8104 error ("%<long%> or %<short%> specified with char for %qs", name);
8105 else if (long_p && short_p)
8106 error ("%<long%> and %<short%> specified together for %qs", name);
8107 else if (type == char16_type_node || type == char32_type_node)
8109 if (signed_p || unsigned_p)
8110 error ("%<signed%> or %<unsigned%> invalid for %qs", name);
8111 else if (short_p || long_p)
8112 error ("%<short%> or %<long%> invalid for %qs", name);
8117 if (!explicit_int && !defaulted_int && !explicit_char && pedantic)
8119 pedwarn (input_location, OPT_pedantic,
8120 "long, short, signed or unsigned used invalidly for %qs",
8122 if (flag_pedantic_errors)
8127 /* Discard the type modifiers if they are invalid. */
8138 /* Decide whether an integer type is signed or not.
8139 Optionally treat bitfields as signed by default. */
8143 It is implementation-defined whether a plain (neither
8144 explicitly signed or unsigned) char, short, int, or long
8145 bit-field is signed or unsigned.
8147 Naturally, we extend this to long long as well. Note that
8148 this does not include wchar_t. */
8149 || (bitfield && !flag_signed_bitfields
8151 /* A typedef for plain `int' without `signed' can be
8152 controlled just like plain `int', but a typedef for
8153 `signed int' cannot be so controlled. */
8155 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl))
8156 && TREE_CODE (type) == INTEGER_TYPE
8157 && !same_type_p (TYPE_MAIN_VARIANT (type), wchar_type_node)))
8160 type = long_long_unsigned_type_node;
8162 type = long_unsigned_type_node;
8164 type = short_unsigned_type_node;
8165 else if (type == char_type_node)
8166 type = unsigned_char_type_node;
8167 else if (typedef_decl)
8168 type = unsigned_type_for (type);
8170 type = unsigned_type_node;
8172 else if (signed_p && type == char_type_node)
8173 type = signed_char_type_node;
8175 type = long_long_integer_type_node;
8177 type = long_integer_type_node;
8179 type = short_integer_type_node;
8181 if (declspecs->specs[(int)ds_complex])
8183 if (TREE_CODE (type) != INTEGER_TYPE && TREE_CODE (type) != REAL_TYPE)
8184 error ("complex invalid for %qs", name);
8185 /* If we just have "complex", it is equivalent to
8186 "complex double", but if any modifiers at all are specified it is
8187 the complex form of TYPE. E.g, "complex short" is
8188 "complex short int". */
8190 else if (defaulted_int && ! longlong
8191 && ! (long_p || short_p || signed_p || unsigned_p))
8192 type = complex_double_type_node;
8193 else if (type == integer_type_node)
8194 type = complex_integer_type_node;
8195 else if (type == float_type_node)
8196 type = complex_float_type_node;
8197 else if (type == double_type_node)
8198 type = complex_double_type_node;
8199 else if (type == long_double_type_node)
8200 type = complex_long_double_type_node;
8202 type = build_complex_type (type);
8205 type_quals = TYPE_UNQUALIFIED;
8206 if (declspecs->specs[(int)ds_const])
8207 type_quals |= TYPE_QUAL_CONST;
8208 /* A `constexpr' specifier used in an object declaration declares
8209 the object as `const'. */
8212 if (innermost_code == cdk_function)
8214 else if (declspecs->specs[(int)ds_const] != 0)
8215 error ("both %<const%> and %<constexpr%> cannot be used here");
8217 type_quals |= TYPE_QUAL_CONST;
8219 if (declspecs->specs[(int)ds_volatile])
8220 type_quals |= TYPE_QUAL_VOLATILE;
8221 if (declspecs->specs[(int)ds_restrict])
8222 type_quals |= TYPE_QUAL_RESTRICT;
8223 if (sfk == sfk_conversion && type_quals != TYPE_UNQUALIFIED)
8224 error ("qualifiers are not allowed on declaration of %<operator %T%>",
8227 type_quals |= cp_type_quals (type);
8228 type = cp_build_qualified_type_real
8229 (type, type_quals, ((typedef_decl && !DECL_ARTIFICIAL (typedef_decl)
8230 ? tf_ignore_bad_quals : 0) | tf_warning_or_error));
8231 /* We might have ignored or rejected some of the qualifiers. */
8232 type_quals = cp_type_quals (type);
8235 inlinep = !! declspecs->specs[(int)ds_inline];
8236 virtualp = !! declspecs->specs[(int)ds_virtual];
8237 explicitp = !! declspecs->specs[(int)ds_explicit];
8239 storage_class = declspecs->storage_class;
8240 if (storage_class == sc_static)
8241 staticp = 1 + (decl_context == FIELD);
8243 if (virtualp && staticp == 2)
8245 error ("member %qD cannot be declared both virtual and static", dname);
8246 storage_class = sc_none;
8249 friendp = !! declspecs->specs[(int)ds_friend];
8251 if (dependent_name && !friendp)
8253 error ("%<%T::%D%> is not a valid declarator", ctype, dependent_name);
8254 return error_mark_node;
8257 /* Issue errors about use of storage classes for parameters. */
8258 if (decl_context == PARM)
8260 if (declspecs->specs[(int)ds_typedef])
8262 error ("typedef declaration invalid in parameter declaration");
8263 return error_mark_node;
8265 else if (template_parm_flag && storage_class != sc_none)
8267 error ("storage class specified for template parameter %qs", name);
8268 return error_mark_node;
8270 else if (storage_class == sc_static
8271 || storage_class == sc_extern
8273 error ("storage class specifiers invalid in parameter declarations");
8275 if (type_uses_auto (type))
8277 error ("parameter declared %<auto%>");
8278 type = error_mark_node;
8281 /* Function parameters cannot be constexpr. If we saw one, moan
8282 and pretend it wasn't there. */
8285 error ("a parameter cannot be declared %<constexpr%>");
8290 /* Give error if `virtual' is used outside of class declaration. */
8292 && (current_class_name == NULL_TREE || decl_context != FIELD))
8294 error ("%<virtual%> outside class declaration");
8298 /* Static anonymous unions are dealt with here. */
8299 if (staticp && decl_context == TYPENAME
8301 && ANON_AGGR_TYPE_P (declspecs->type))
8302 decl_context = FIELD;
8304 /* Warn about storage classes that are invalid for certain
8305 kinds of declarations (parameters, typenames, etc.). */
8308 && storage_class != sc_extern
8309 && storage_class != sc_static)
8310 || declspecs->specs[(int)ds_typedef]))
8312 error ("multiple storage classes in declaration of %qs", name);
8315 if (decl_context != NORMAL
8316 && ((storage_class != sc_none
8317 && storage_class != sc_mutable)
8320 if ((decl_context == PARM || decl_context == CATCHPARM)
8321 && (storage_class == sc_register
8322 || storage_class == sc_auto))
8324 else if (declspecs->specs[(int)ds_typedef])
8326 else if (decl_context == FIELD
8327 /* C++ allows static class elements. */
8328 && storage_class == sc_static)
8329 /* C++ also allows inlines and signed and unsigned elements,
8330 but in those cases we don't come in here. */
8334 if (decl_context == FIELD)
8335 error ("storage class specified for %qs", name);
8338 if (decl_context == PARM || decl_context == CATCHPARM)
8339 error ("storage class specified for parameter %qs", name);
8341 error ("storage class specified for typename");
8343 if (storage_class == sc_register
8344 || storage_class == sc_auto
8345 || storage_class == sc_extern
8347 storage_class = sc_none;
8350 else if (storage_class == sc_extern && funcdef_flag
8351 && ! toplevel_bindings_p ())
8352 error ("nested function %qs declared %<extern%>", name);
8353 else if (toplevel_bindings_p ())
8355 if (storage_class == sc_auto)
8356 error ("top-level declaration of %qs specifies %<auto%>", name);
8359 && storage_class != sc_extern
8360 && storage_class != sc_static)
8362 error ("function-scope %qs implicitly auto and declared %<__thread%>",
8367 if (storage_class && friendp)
8369 error ("storage class specifiers invalid in friend function declarations");
8370 storage_class = sc_none;
8375 unqualified_id = NULL_TREE;
8378 unqualified_id = id_declarator->u.id.unqualified_name;
8379 switch (TREE_CODE (unqualified_id))
8382 unqualified_id = TREE_OPERAND (unqualified_id, 0);
8383 if (TYPE_P (unqualified_id))
8384 unqualified_id = constructor_name (unqualified_id);
8387 case IDENTIFIER_NODE:
8388 case TEMPLATE_ID_EXPR:
8396 /* Determine the type of the entity declared by recurring on the
8398 for (; declarator; declarator = declarator->declarator)
8400 const cp_declarator *inner_declarator;
8403 if (type == error_mark_node)
8404 return error_mark_node;
8406 attrs = declarator->attributes;
8412 if (declarator == NULL || declarator->kind == cdk_id)
8413 attr_flags |= (int) ATTR_FLAG_DECL_NEXT;
8414 if (declarator->kind == cdk_function)
8415 attr_flags |= (int) ATTR_FLAG_FUNCTION_NEXT;
8416 if (declarator->kind == cdk_array)
8417 attr_flags |= (int) ATTR_FLAG_ARRAY_NEXT;
8418 returned_attrs = decl_attributes (&type,
8419 chainon (returned_attrs, attrs),
8423 if (declarator->kind == cdk_id)
8426 inner_declarator = declarator->declarator;
8428 switch (declarator->kind)
8431 type = create_array_type_for_decl (dname, type,
8432 declarator->u.array.bounds);
8440 /* Declaring a function type.
8441 Make sure we have a valid type for the function to return. */
8443 if (type_quals != TYPE_UNQUALIFIED)
8445 if (SCALAR_TYPE_P (type) || VOID_TYPE_P (type))
8446 warning (OPT_Wignored_qualifiers,
8447 "type qualifiers ignored on function return type");
8448 /* We now know that the TYPE_QUALS don't apply to the
8449 decl, but to its return type. */
8450 type_quals = TYPE_UNQUALIFIED;
8452 errmsg = targetm.invalid_return_type (type);
8456 type = integer_type_node;
8459 /* Error about some types functions can't return. */
8461 if (TREE_CODE (type) == FUNCTION_TYPE)
8463 error ("%qs declared as function returning a function", name);
8464 return error_mark_node;
8466 if (TREE_CODE (type) == ARRAY_TYPE)
8468 error ("%qs declared as function returning an array", name);
8469 return error_mark_node;
8472 /* Pick up type qualifiers which should be applied to `this'. */
8473 memfn_quals = declarator->u.function.qualifiers;
8475 /* Pick up the exception specifications. */
8476 raises = declarator->u.function.exception_specification;
8478 /* Say it's a definition only for the CALL_EXPR
8479 closest to the identifier. */
8480 funcdecl_p = inner_declarator && inner_declarator->kind == cdk_id;
8482 /* Handle a late-specified return type. */
8485 if (type_uses_auto (type))
8487 if (!declarator->u.function.late_return_type)
8489 error ("%qs function uses %<auto%> type specifier without"
8490 " late return type", name);
8491 return error_mark_node;
8493 else if (!is_auto (type))
8495 error ("%qs function with late return type has"
8496 " %qT as its type rather than plain %<auto%>",
8498 return error_mark_node;
8501 else if (declarator->u.function.late_return_type)
8503 error ("%qs function with late return type not declared"
8504 " with %<auto%> type specifier", name);
8505 return error_mark_node;
8508 type = splice_late_return_type
8509 (type, declarator->u.function.late_return_type);
8510 if (type == error_mark_node)
8511 return error_mark_node;
8513 if (ctype == NULL_TREE
8514 && decl_context == FIELD
8516 && (friendp == 0 || dname == current_class_name))
8517 ctype = current_class_type;
8519 if (ctype && (sfk == sfk_constructor
8520 || sfk == sfk_destructor))
8522 /* We are within a class's scope. If our declarator name
8523 is the same as the class name, and we are defining
8524 a function, then it is a constructor/destructor, and
8525 therefore returns a void type. */
8527 /* ISO C++ 12.4/2. A destructor may not be declared
8528 const or volatile. A destructor may not be
8531 ISO C++ 12.1. A constructor may not be declared
8532 const or volatile. A constructor may not be
8533 virtual. A constructor may not be static. */
8535 error ((flags == DTOR_FLAG)
8536 ? "destructor cannot be static member function"
8537 : "constructor cannot be static member function");
8540 error ((flags == DTOR_FLAG)
8541 ? "destructors may not be cv-qualified"
8542 : "constructors may not be cv-qualified");
8543 memfn_quals = TYPE_UNQUALIFIED;
8546 if (decl_context == FIELD
8547 && !member_function_or_else (ctype,
8550 return error_mark_node;
8552 if (flags != DTOR_FLAG)
8554 /* It's a constructor. */
8559 permerror (input_location, "constructors cannot be declared virtual");
8562 if (decl_context == FIELD
8563 && sfk != sfk_constructor)
8564 return error_mark_node;
8566 if (decl_context == FIELD)
8572 error ("can't initialize friend function %qs", name);
8575 /* Cannot be both friend and virtual. */
8576 error ("virtual functions cannot be friends");
8579 if (decl_context == NORMAL)
8580 error ("friend declaration not in class definition");
8581 if (current_function_decl && funcdef_flag)
8582 error ("can't define friend function %qs in a local "
8586 else if (ctype && sfk == sfk_conversion)
8590 maybe_warn_cpp0x (CPP0X_EXPLICIT_CONVERSION);
8595 /* It is not allowed to use `constexpr' in a function
8596 declaration that is not a definition.
8597 That is too strict, though. */
8598 if (constexpr_p && !funcdef_flag)
8600 error ("the %<constexpr%> specifier cannot be used in "
8601 "a function declaration that is not a definition");
8602 constexpr_p = false;
8605 /* A constexpr non-static member function is implicitly const. */
8606 if (constexpr_p && decl_context == FIELD && staticp == 0
8607 && sfk != sfk_constructor && sfk != sfk_destructor)
8608 memfn_quals |= TYPE_QUAL_CONST;
8610 arg_types = grokparms (declarator->u.function.parameters,
8613 if (inner_declarator
8614 && inner_declarator->kind == cdk_id
8615 && inner_declarator->u.id.sfk == sfk_destructor
8616 && arg_types != void_list_node)
8618 error ("destructors may not have parameters");
8619 arg_types = void_list_node;
8623 type = build_function_type (type, arg_types);
8630 /* Filter out pointers-to-references and references-to-references.
8631 We can get these if a TYPE_DECL is used. */
8633 if (TREE_CODE (type) == REFERENCE_TYPE)
8635 if (declarator->kind != cdk_reference)
8637 error ("cannot declare pointer to %q#T", type);
8638 type = TREE_TYPE (type);
8641 /* In C++0x, we allow reference to reference declarations
8642 that occur indirectly through typedefs [7.1.3/8 dcl.typedef]
8643 and template type arguments [14.3.1/4 temp.arg.type]. The
8644 check for direct reference to reference declarations, which
8645 are still forbidden, occurs below. Reasoning behind the change
8646 can be found in DR106, DR540, and the rvalue reference
8648 else if (cxx_dialect == cxx98)
8650 error ("cannot declare reference to %q#T", type);
8651 type = TREE_TYPE (type);
8654 else if (VOID_TYPE_P (type))
8656 if (declarator->kind == cdk_reference)
8657 error ("cannot declare reference to %q#T", type);
8658 else if (declarator->kind == cdk_ptrmem)
8659 error ("cannot declare pointer to %q#T member", type);
8662 /* We now know that the TYPE_QUALS don't apply to the decl,
8663 but to the target of the pointer. */
8664 type_quals = TYPE_UNQUALIFIED;
8666 if (declarator->kind == cdk_ptrmem
8667 && (TREE_CODE (type) == FUNCTION_TYPE
8668 || (memfn_quals && TREE_CODE (type) == METHOD_TYPE)))
8670 memfn_quals |= type_memfn_quals (type);
8671 type = build_memfn_type (type,
8672 declarator->u.pointer.class_type,
8674 memfn_quals = TYPE_UNQUALIFIED;
8677 if (TREE_CODE (type) == FUNCTION_TYPE
8678 && type_memfn_quals (type) != TYPE_UNQUALIFIED)
8679 error (declarator->kind == cdk_reference
8680 ? G_("cannot declare reference to qualified function type %qT")
8681 : G_("cannot declare pointer to qualified function type %qT"),
8684 if (declarator->kind == cdk_reference)
8686 /* In C++0x, the type we are creating a reference to might be
8687 a typedef which is itself a reference type. In that case,
8688 we follow the reference collapsing rules in
8689 [7.1.3/8 dcl.typedef] to create the final reference type:
8691 "If a typedef TD names a type that is a reference to a type
8692 T, an attempt to create the type 'lvalue reference to cv TD'
8693 creates the type 'lvalue reference to T,' while an attempt
8694 to create the type "rvalue reference to cv TD' creates the
8697 if (!VOID_TYPE_P (type))
8698 type = cp_build_reference_type
8699 ((TREE_CODE (type) == REFERENCE_TYPE
8700 ? TREE_TYPE (type) : type),
8701 (declarator->u.reference.rvalue_ref
8702 && (TREE_CODE(type) != REFERENCE_TYPE
8703 || TYPE_REF_IS_RVALUE (type))));
8705 /* In C++0x, we need this check for direct reference to
8706 reference declarations, which are forbidden by
8707 [8.3.2/5 dcl.ref]. Reference to reference declarations
8708 are only allowed indirectly through typedefs and template
8709 type arguments. Example:
8711 void foo(int & &); // invalid ref-to-ref decl
8713 typedef int & int_ref;
8714 void foo(int_ref &); // valid ref-to-ref decl
8716 if (inner_declarator && inner_declarator->kind == cdk_reference)
8717 error ("cannot declare reference to %q#T, which is not "
8718 "a typedef or a template type argument", type);
8720 else if (TREE_CODE (type) == METHOD_TYPE)
8721 type = build_ptrmemfunc_type (build_pointer_type (type));
8722 else if (declarator->kind == cdk_ptrmem)
8724 gcc_assert (TREE_CODE (declarator->u.pointer.class_type)
8726 if (declarator->u.pointer.class_type == error_mark_node)
8727 /* We will already have complained. */
8728 type = error_mark_node;
8730 type = build_ptrmem_type (declarator->u.pointer.class_type,
8734 type = build_pointer_type (type);
8736 /* Process a list of type modifier keywords (such as
8737 const or volatile) that were given inside the `*' or `&'. */
8739 if (declarator->u.pointer.qualifiers)
8742 = cp_build_qualified_type (type,
8743 declarator->u.pointer.qualifiers);
8744 type_quals = cp_type_quals (type);
8757 if (unqualified_id && TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR
8758 && TREE_CODE (type) != FUNCTION_TYPE
8759 && TREE_CODE (type) != METHOD_TYPE)
8761 error ("template-id %qD used as a declarator",
8763 unqualified_id = dname;
8766 /* If TYPE is a FUNCTION_TYPE, but the function name was explicitly
8767 qualified with a class-name, turn it into a METHOD_TYPE, unless
8768 we know that the function is static. We take advantage of this
8769 opportunity to do other processing that pertains to entities
8770 explicitly declared to be class members. Note that if DECLARATOR
8771 is non-NULL, we know it is a cdk_id declarator; otherwise, we
8772 would not have exited the loop above. */
8774 && declarator->u.id.qualifying_scope
8775 && TYPE_P (declarator->u.id.qualifying_scope))
8779 ctype = declarator->u.id.qualifying_scope;
8780 ctype = TYPE_MAIN_VARIANT (ctype);
8782 while (t != NULL_TREE && CLASS_TYPE_P (t))
8784 /* You're supposed to have one `template <...>' for every
8785 template class, but you don't need one for a full
8786 specialization. For example:
8788 template <class T> struct S{};
8789 template <> struct S<int> { void f(); };
8790 void S<int>::f () {}
8792 is correct; there shouldn't be a `template <>' for the
8793 definition of `S<int>::f'. */
8794 if (CLASSTYPE_TEMPLATE_SPECIALIZATION (t)
8795 && !any_dependent_template_arguments_p (CLASSTYPE_TI_ARGS (t)))
8796 /* T is an explicit (not partial) specialization. All
8797 containing classes must therefore also be explicitly
8800 if ((CLASSTYPE_USE_TEMPLATE (t) || CLASSTYPE_IS_TEMPLATE (t))
8801 && PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (t)))
8802 template_count += 1;
8804 t = TYPE_MAIN_DECL (t);
8805 t = DECL_CONTEXT (t);
8808 if (ctype == current_class_type)
8812 permerror (input_location, "member functions are implicitly friends of their class");
8816 permerror (declarator->id_loc,
8817 "extra qualification %<%T::%> on member %qs",
8820 else if (/* If the qualifying type is already complete, then we
8821 can skip the following checks. */
8822 !COMPLETE_TYPE_P (ctype)
8823 && (/* If the function is being defined, then
8824 qualifying type must certainly be complete. */
8826 /* A friend declaration of "T::f" is OK, even if
8827 "T" is a template parameter. But, if this
8828 function is not a friend, the qualifying type
8830 || (!friendp && !CLASS_TYPE_P (ctype))
8831 /* For a declaration, the type need not be
8832 complete, if either it is dependent (since there
8833 is no meaningful definition of complete in that
8834 case) or the qualifying class is currently being
8836 || !(dependent_type_p (ctype)
8837 || currently_open_class (ctype)))
8838 /* Check that the qualifying type is complete. */
8839 && !complete_type_or_else (ctype, NULL_TREE))
8840 return error_mark_node;
8841 else if (TREE_CODE (type) == FUNCTION_TYPE)
8843 tree sname = declarator->u.id.unqualified_name;
8845 if (current_class_type
8846 && (!friendp || funcdef_flag))
8849 ? "cannot define member function %<%T::%s%> within %<%T%>"
8850 : "cannot declare member function %<%T::%s%> within %<%T%>",
8851 ctype, name, current_class_type);
8852 return error_mark_node;
8855 /* It is not permitted to define a member function outside ist
8856 membership class as `constexpr'. */
8858 error ("a constexpr function cannot be defined "
8859 "outside of its class");
8861 if (TREE_CODE (sname) == IDENTIFIER_NODE
8862 && NEW_DELETE_OPNAME_P (sname))
8863 /* Overloaded operator new and operator delete
8864 are always static functions. */
8867 type = build_memfn_type (type, ctype, memfn_quals);
8869 else if (declspecs->specs[(int)ds_typedef]
8870 && current_class_type)
8872 error ("cannot declare member %<%T::%s%> within %qT",
8873 ctype, name, current_class_type);
8874 return error_mark_node;
8878 /* Now TYPE has the actual type. */
8883 *attrlist = chainon (returned_attrs, *attrlist);
8885 attrlist = &returned_attrs;
8888 /* Handle parameter packs. */
8889 if (parameter_pack_p)
8891 if (decl_context == PARM)
8892 /* Turn the type into a pack expansion.*/
8893 type = make_pack_expansion (type);
8895 error ("non-parameter %qs cannot be a parameter pack", name);
8898 /* Did array size calculations overflow? */
8900 if (TREE_CODE (type) == ARRAY_TYPE
8901 && COMPLETE_TYPE_P (type)
8902 && TREE_CODE (TYPE_SIZE_UNIT (type)) == INTEGER_CST
8903 && TREE_OVERFLOW (TYPE_SIZE_UNIT (type)))
8905 error ("size of array %qs is too large", name);
8906 /* If we proceed with the array type as it is, we'll eventually
8907 crash in tree_low_cst(). */
8908 type = error_mark_node;
8911 if ((decl_context == FIELD || decl_context == PARM)
8912 && !processing_template_decl
8913 && variably_modified_type_p (type, NULL_TREE))
8915 if (decl_context == FIELD)
8916 error ("data member may not have variably modified type %qT", type);
8918 error ("parameter may not have variably modified type %qT", type);
8919 type = error_mark_node;
8922 if (explicitp == 1 || (explicitp && friendp))
8924 /* [dcl.fct.spec] The explicit specifier shall only be used in
8925 declarations of constructors within a class definition. */
8926 error ("only declarations of constructors can be %<explicit%>");
8930 if (storage_class == sc_mutable)
8932 if (decl_context != FIELD || friendp)
8934 error ("non-member %qs cannot be declared %<mutable%>", name);
8935 storage_class = sc_none;
8937 else if (decl_context == TYPENAME || declspecs->specs[(int)ds_typedef])
8939 error ("non-object member %qs cannot be declared %<mutable%>", name);
8940 storage_class = sc_none;
8942 else if (TREE_CODE (type) == FUNCTION_TYPE
8943 || TREE_CODE (type) == METHOD_TYPE)
8945 error ("function %qs cannot be declared %<mutable%>", name);
8946 storage_class = sc_none;
8950 error ("static %qs cannot be declared %<mutable%>", name);
8951 storage_class = sc_none;
8953 else if (type_quals & TYPE_QUAL_CONST)
8955 error ("const %qs cannot be declared %<mutable%>", name);
8956 storage_class = sc_none;
8960 /* If this is declaring a typedef name, return a TYPE_DECL. */
8961 if (declspecs->specs[(int)ds_typedef] && decl_context != TYPENAME)
8965 /* Note that the grammar rejects storage classes
8966 in typenames, fields or parameters. */
8967 if (current_lang_name == lang_name_java)
8968 TYPE_FOR_JAVA (type) = 1;
8970 /* This declaration:
8972 typedef void f(int) const;
8974 declares a function type which is not a member of any
8975 particular class, but which is cv-qualified; for
8976 example "f S::*" declares a pointer to a const-qualified
8977 member function of S. We record the cv-qualification in the
8979 if (memfn_quals && TREE_CODE (type) == FUNCTION_TYPE)
8981 type = apply_memfn_quals (type, memfn_quals);
8983 /* We have now dealt with these qualifiers. */
8984 memfn_quals = TYPE_UNQUALIFIED;
8987 if (decl_context == FIELD)
8988 decl = build_lang_decl (TYPE_DECL, unqualified_id, type);
8990 decl = build_decl (input_location, TYPE_DECL, unqualified_id, type);
8991 if (id_declarator && declarator->u.id.qualifying_scope) {
8992 error_at (DECL_SOURCE_LOCATION (decl),
8993 "typedef name may not be a nested-name-specifier");
8994 TREE_TYPE (decl) = error_mark_node;
8997 if (decl_context != FIELD)
8999 if (!current_function_decl)
9000 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
9001 else if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (current_function_decl)
9002 || (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P
9003 (current_function_decl)))
9004 /* The TYPE_DECL is "abstract" because there will be
9005 clones of this constructor/destructor, and there will
9006 be copies of this TYPE_DECL generated in those
9008 DECL_ABSTRACT (decl) = 1;
9010 else if (constructor_name_p (unqualified_id, current_class_type))
9011 permerror (input_location, "ISO C++ forbids nested type %qD with same name "
9012 "as enclosing class",
9015 /* If the user declares "typedef struct {...} foo" then the
9016 struct will have an anonymous name. Fill that name in now.
9017 Nothing can refer to it, so nothing needs know about the name
9019 if (type != error_mark_node
9022 && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
9023 && TYPE_ANONYMOUS_P (type)
9024 && cp_type_quals (type) == TYPE_UNQUALIFIED)
9028 /* Replace the anonymous name with the real name everywhere. */
9029 for (t = TYPE_MAIN_VARIANT (type); t; t = TYPE_NEXT_VARIANT (t))
9031 if (ANON_AGGRNAME_P (TYPE_IDENTIFIER (t)))
9033 debug_hooks->set_name (t, decl);
9034 TYPE_NAME (t) = decl;
9038 if (TYPE_LANG_SPECIFIC (type))
9039 TYPE_WAS_ANONYMOUS (type) = 1;
9041 /* If this is a typedef within a template class, the nested
9042 type is a (non-primary) template. The name for the
9043 template needs updating as well. */
9044 if (TYPE_LANG_SPECIFIC (type) && CLASSTYPE_TEMPLATE_INFO (type))
9045 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type))
9046 = TYPE_IDENTIFIER (type);
9048 /* Adjust linkage now that we aren't anonymous anymore. */
9049 set_linkage_according_to_type (type, TYPE_MAIN_DECL (type));
9050 determine_visibility (TYPE_MAIN_DECL (type));
9052 /* FIXME remangle member functions; member functions of a
9053 type with external linkage have external linkage. */
9057 || (typedef_decl && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl)))
9058 C_TYPEDEF_EXPLICITLY_SIGNED (decl) = 1;
9060 bad_specifiers (decl, "type", virtualp,
9061 memfn_quals != TYPE_UNQUALIFIED,
9062 inlinep, friendp, raises != NULL_TREE);
9067 /* Detect the case of an array type of unspecified size
9068 which came, as such, direct from a typedef name.
9069 We must copy the type, so that the array's domain can be
9070 individually set by the object's initializer. */
9072 if (type && typedef_type
9073 && TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type)
9074 && TYPE_MAIN_VARIANT (type) == TYPE_MAIN_VARIANT (typedef_type))
9075 type = build_cplus_array_type (TREE_TYPE (type), NULL_TREE);
9077 /* Detect where we're using a typedef of function type to declare a
9078 function. PARMS will not be set, so we must create it now. */
9080 if (type == typedef_type && TREE_CODE (type) == FUNCTION_TYPE)
9082 tree decls = NULL_TREE;
9085 for (args = TYPE_ARG_TYPES (type);
9086 args && args != void_list_node;
9087 args = TREE_CHAIN (args))
9089 tree decl = cp_build_parm_decl (NULL_TREE, TREE_VALUE (args));
9091 TREE_CHAIN (decl) = decls;
9095 parms = nreverse (decls);
9097 if (decl_context != TYPENAME)
9099 /* A cv-qualifier-seq shall only be part of the function type
9100 for a non-static member function. [8.3.5/4 dcl.fct] */
9101 if (type_memfn_quals (type) != TYPE_UNQUALIFIED
9102 && (current_class_type == NULL_TREE || staticp) )
9105 ? G_("qualified function types cannot be used to "
9106 "declare static member functions")
9107 : G_("qualified function types cannot be used to "
9108 "declare free functions"));
9109 type = TYPE_MAIN_VARIANT (type);
9112 /* The qualifiers on the function type become the qualifiers on
9113 the non-static member function. */
9114 memfn_quals |= type_memfn_quals (type);
9115 type_quals = TYPE_UNQUALIFIED;
9119 /* If this is a type name (such as, in a cast or sizeof),
9120 compute the type and return it now. */
9122 if (decl_context == TYPENAME)
9124 /* Note that the grammar rejects storage classes
9125 in typenames, fields or parameters. */
9126 if (type_quals != TYPE_UNQUALIFIED)
9127 type_quals = TYPE_UNQUALIFIED;
9129 /* Special case: "friend class foo" looks like a TYPENAME context. */
9132 if (type_quals != TYPE_UNQUALIFIED)
9134 error ("type qualifiers specified for friend class declaration");
9135 type_quals = TYPE_UNQUALIFIED;
9139 error ("%<inline%> specified for friend class declaration");
9145 /* Don't allow friend declaration without a class-key. */
9146 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
9147 permerror (input_location, "template parameters cannot be friends");
9148 else if (TREE_CODE (type) == TYPENAME_TYPE)
9149 permerror (input_location, "friend declaration requires class-key, "
9150 "i.e. %<friend class %T::%D%>",
9151 TYPE_CONTEXT (type), TYPENAME_TYPE_FULLNAME (type));
9153 permerror (input_location, "friend declaration requires class-key, "
9154 "i.e. %<friend %#T%>",
9158 /* Only try to do this stuff if we didn't already give up. */
9159 if (type != integer_type_node)
9161 /* A friendly class? */
9162 if (current_class_type)
9163 make_friend_class (current_class_type, TYPE_MAIN_VARIANT (type),
9166 error ("trying to make class %qT a friend of global scope",
9169 type = void_type_node;
9172 else if (memfn_quals)
9174 if (ctype == NULL_TREE
9175 && TREE_CODE (type) == METHOD_TYPE)
9176 ctype = TYPE_METHOD_BASETYPE (type);
9179 type = build_memfn_type (type, ctype, memfn_quals);
9180 /* Core issue #547: need to allow this in template type args. */
9181 else if (template_type_arg && TREE_CODE (type) == FUNCTION_TYPE)
9182 type = apply_memfn_quals (type, memfn_quals);
9184 error ("invalid qualifiers on non-member function type");
9189 else if (unqualified_id == NULL_TREE && decl_context != PARM
9190 && decl_context != CATCHPARM
9191 && TREE_CODE (type) != UNION_TYPE
9194 error ("abstract declarator %qT used as declaration", type);
9195 return error_mark_node;
9198 /* Only functions may be declared using an operator-function-id. */
9200 && IDENTIFIER_OPNAME_P (unqualified_id)
9201 && TREE_CODE (type) != FUNCTION_TYPE
9202 && TREE_CODE (type) != METHOD_TYPE)
9204 error ("declaration of %qD as non-function", unqualified_id);
9205 return error_mark_node;
9208 /* We don't check parameter types here because we can emit a better
9209 error message later. */
9210 if (decl_context != PARM)
9212 type = check_var_type (unqualified_id, type);
9213 if (type == error_mark_node)
9214 return error_mark_node;
9217 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
9218 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
9220 if (decl_context == PARM || decl_context == CATCHPARM)
9222 if (ctype || in_namespace)
9223 error ("cannot use %<::%> in parameter declaration");
9225 /* A parameter declared as an array of T is really a pointer to T.
9226 One declared as a function is really a pointer to a function.
9227 One declared as a member is really a pointer to member. */
9229 if (TREE_CODE (type) == ARRAY_TYPE)
9231 /* Transfer const-ness of array into that of type pointed to. */
9232 type = build_pointer_type (TREE_TYPE (type));
9233 type_quals = TYPE_UNQUALIFIED;
9235 else if (TREE_CODE (type) == FUNCTION_TYPE)
9236 type = build_pointer_type (type);
9242 if (decl_context == PARM)
9244 decl = cp_build_parm_decl (unqualified_id, type);
9246 bad_specifiers (decl, "parameter", virtualp,
9247 memfn_quals != TYPE_UNQUALIFIED,
9248 inlinep, friendp, raises != NULL_TREE);
9250 else if (decl_context == FIELD)
9252 /* The C99 flexible array extension. */
9253 if (!staticp && TREE_CODE (type) == ARRAY_TYPE
9254 && TYPE_DOMAIN (type) == NULL_TREE)
9256 tree itype = compute_array_index_type (dname, integer_zero_node);
9257 type = build_cplus_array_type (TREE_TYPE (type), itype);
9260 if (type == error_mark_node)
9262 /* Happens when declaring arrays of sizes which
9263 are error_mark_node, for example. */
9266 else if (in_namespace && !friendp)
9268 /* Something like struct S { int N::j; }; */
9269 error ("invalid use of %<::%>");
9270 return error_mark_node;
9272 else if (TREE_CODE (type) == FUNCTION_TYPE)
9275 tree function_context;
9279 if (ctype == NULL_TREE)
9280 ctype = current_class_type;
9282 if (ctype == NULL_TREE)
9284 error ("can't make %qD into a method -- not in a class",
9286 return error_mark_node;
9289 /* ``A union may [ ... ] not [ have ] virtual functions.''
9291 if (virtualp && TREE_CODE (ctype) == UNION_TYPE)
9293 error ("function %qD declared virtual inside a union",
9295 return error_mark_node;
9298 if (NEW_DELETE_OPNAME_P (unqualified_id))
9302 error ("%qD cannot be declared virtual, since it "
9308 else if (staticp < 2)
9309 type = build_memfn_type (type, ctype, memfn_quals);
9312 /* Check that the name used for a destructor makes sense. */
9313 if (sfk == sfk_destructor)
9315 tree uqname = id_declarator->u.id.unqualified_name;
9319 gcc_assert (friendp);
9320 error ("expected qualified name in friend declaration "
9321 "for destructor %qD", uqname);
9322 return error_mark_node;
9325 if (!check_dtor_name (ctype, TREE_OPERAND (uqname, 0)))
9327 error ("declaration of %qD as member of %qT",
9329 return error_mark_node;
9332 error ("a destructor cannot be %<constexpr%>");
9334 else if (sfk == sfk_constructor && friendp)
9336 error ("expected qualified name in friend declaration "
9337 "for constructor %qD",
9338 id_declarator->u.id.unqualified_name);
9339 return error_mark_node;
9342 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
9343 function_context = (ctype != NULL_TREE) ?
9344 decl_function_context (TYPE_MAIN_DECL (ctype)) : NULL_TREE;
9345 publicp = (! friendp || ! staticp)
9346 && function_context == NULL_TREE;
9347 decl = grokfndecl (ctype, type,
9348 TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
9349 ? unqualified_id : dname,
9352 virtualp, flags, memfn_quals, raises,
9353 friendp ? -1 : 0, friendp, publicp,
9354 inlinep || constexpr_p,
9356 funcdef_flag, template_count, in_namespace,
9357 attrlist, declarator->id_loc);
9358 if (decl == NULL_TREE)
9359 return error_mark_node;
9361 /* This clobbers the attrs stored in `decl' from `attrlist'. */
9362 /* The decl and setting of decl_attr is also turned off. */
9363 decl = build_decl_attribute_variant (decl, decl_attr);
9366 /* [class.conv.ctor]
9368 A constructor declared without the function-specifier
9369 explicit that can be called with a single parameter
9370 specifies a conversion from the type of its first
9371 parameter to the type of its class. Such a constructor
9372 is called a converting constructor. */
9374 DECL_NONCONVERTING_P (decl) = 1;
9376 else if (TREE_CODE (type) == METHOD_TYPE)
9378 /* We only get here for friend declarations of
9379 members of other classes. */
9380 /* All method decls are public, so tell grokfndecl to set
9381 TREE_PUBLIC, also. */
9382 decl = grokfndecl (ctype, type,
9383 TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
9384 ? unqualified_id : dname,
9387 virtualp, flags, memfn_quals, raises,
9388 friendp ? -1 : 0, friendp, 1, 0, sfk,
9389 funcdef_flag, template_count, in_namespace,
9391 declarator->id_loc);
9392 if (decl == NULL_TREE)
9393 return error_mark_node;
9395 else if (!staticp && !dependent_type_p (type)
9396 && !COMPLETE_TYPE_P (complete_type (type))
9397 && (TREE_CODE (type) != ARRAY_TYPE || initialized == 0))
9400 error ("field %qD has incomplete type", unqualified_id);
9402 error ("name %qT has incomplete type", type);
9404 /* If we're instantiating a template, tell them which
9405 instantiation made the field's type be incomplete. */
9406 if (current_class_type
9407 && TYPE_NAME (current_class_type)
9408 && IDENTIFIER_TEMPLATE (TYPE_IDENTIFIER (current_class_type))
9410 && declspecs->type == type)
9411 error (" in instantiation of template %qT",
9412 current_class_type);
9414 return error_mark_node;
9420 error ("%qE is neither function nor member function; "
9421 "cannot be declared friend", unqualified_id);
9429 /* Friends are treated specially. */
9430 if (ctype == current_class_type)
9431 ; /* We already issued a permerror. */
9432 else if (decl && DECL_NAME (decl))
9434 if (template_class_depth (current_class_type) == 0)
9436 decl = check_explicit_specialization
9437 (unqualified_id, decl, template_count,
9438 2 * funcdef_flag + 4);
9439 if (decl == error_mark_node)
9440 return error_mark_node;
9443 DECL_DECLARED_CONSTEXPR_P (decl) = constexpr_p;
9444 decl = do_friend (ctype, unqualified_id, decl,
9450 return error_mark_node;
9453 /* Structure field. It may not be a function, except for C++. */
9455 if (decl == NULL_TREE)
9461 /* An attempt is being made to initialize a non-static
9462 member. But, from [class.mem]:
9464 4 A member-declarator can contain a
9465 constant-initializer only if it declares a static
9466 member (_class.static_) of integral or enumeration
9467 type, see _class.static.data_.
9469 This used to be relatively common practice, but
9470 the rest of the compiler does not correctly
9471 handle the initialization unless the member is
9472 static so we make it static below. */
9473 permerror (input_location, "ISO C++ forbids initialization of member %qD",
9475 permerror (input_location, "making %qD static", unqualified_id);
9479 if (uses_template_parms (type))
9480 /* We'll check at instantiation time. */
9482 else if (check_static_variable_definition (unqualified_id,
9484 /* If we just return the declaration, crashes
9485 will sometimes occur. We therefore return
9486 void_type_node, as if this was a friend
9487 declaration, to cause callers to completely
9488 ignore this declaration. */
9489 return error_mark_node;
9494 /* C++ allows static class members. All other work
9495 for this is done by grokfield. */
9496 decl = build_lang_decl (VAR_DECL, unqualified_id, type);
9497 set_linkage_for_static_data_member (decl);
9498 /* Even if there is an in-class initialization, DECL
9499 is considered undefined until an out-of-class
9500 definition is provided. */
9501 DECL_EXTERNAL (decl) = 1;
9504 DECL_TLS_MODEL (decl) = decl_default_tls_model (decl);
9509 error ("non-static data member %qE declared %<constexpr%>",
9511 decl = build_decl (input_location,
9512 FIELD_DECL, unqualified_id, type);
9513 DECL_NONADDRESSABLE_P (decl) = bitfield;
9514 if (bitfield && !unqualified_id)
9515 TREE_NO_WARNING (decl) = 1;
9517 if (storage_class == sc_mutable)
9519 DECL_MUTABLE_P (decl) = 1;
9520 storage_class = sc_none;
9524 bad_specifiers (decl, "field", virtualp,
9525 memfn_quals != TYPE_UNQUALIFIED,
9526 inlinep, friendp, raises != NULL_TREE);
9529 else if (TREE_CODE (type) == FUNCTION_TYPE
9530 || TREE_CODE (type) == METHOD_TYPE)
9535 if (!unqualified_id)
9536 return error_mark_node;
9538 if (TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR)
9539 original_name = dname;
9541 original_name = unqualified_id;
9543 if (storage_class == sc_auto)
9544 error ("storage class %<auto%> invalid for function %qs", name);
9545 else if (storage_class == sc_register)
9546 error ("storage class %<register%> invalid for function %qs", name);
9548 error ("storage class %<__thread%> invalid for function %qs", name);
9550 /* Function declaration not at top level.
9551 Storage classes other than `extern' are not allowed
9552 and `extern' makes no difference. */
9553 if (! toplevel_bindings_p ()
9554 && (storage_class == sc_static
9555 || declspecs->specs[(int)ds_inline])
9558 if (storage_class == sc_static)
9559 pedwarn (input_location, OPT_pedantic,
9560 "%<static%> specified invalid for function %qs "
9561 "declared out of global scope", name);
9563 pedwarn (input_location, OPT_pedantic,
9564 "%<inline%> specifier invalid for function %qs "
9565 "declared out of global scope", name);
9568 if (ctype != NULL_TREE
9569 && TREE_CODE (ctype) != NAMESPACE_DECL && !MAYBE_CLASS_TYPE_P (ctype))
9571 error ("%q#T is not a class or a namespace", ctype);
9575 if (ctype == NULL_TREE)
9579 error ("virtual non-class function %qs", name);
9582 else if (sfk == sfk_constructor
9583 || sfk == sfk_destructor)
9586 ? "%qs defined in a non-class scope"
9587 : "%qs declared in a non-class scope", name);
9591 else if (TREE_CODE (type) == FUNCTION_TYPE && staticp < 2
9592 && !NEW_DELETE_OPNAME_P (original_name))
9593 type = build_method_type_directly (ctype,
9595 TYPE_ARG_TYPES (type));
9597 /* Record presence of `static'. */
9598 publicp = (ctype != NULL_TREE
9599 || storage_class == sc_extern
9600 || storage_class != sc_static);
9602 decl = grokfndecl (ctype, type, original_name, parms, unqualified_id,
9603 virtualp, flags, memfn_quals, raises,
9605 publicp, inlinep || constexpr_p, sfk, funcdef_flag,
9606 template_count, in_namespace, attrlist,
9607 declarator->id_loc);
9608 if (decl == NULL_TREE)
9609 return error_mark_node;
9613 int invalid_static = 0;
9615 /* Don't allow a static member function in a class, and forbid
9616 declaring main to be static. */
9617 if (TREE_CODE (type) == METHOD_TYPE)
9619 permerror (input_location, "cannot declare member function %qD to have "
9620 "static linkage", decl);
9623 else if (current_function_decl)
9625 /* FIXME need arm citation */
9626 error ("cannot declare static function inside another function");
9633 storage_class = sc_none;
9639 /* It's a variable. */
9641 /* An uninitialized decl with `extern' is a reference. */
9642 decl = grokvardecl (type, unqualified_id,
9645 (type_quals & TYPE_QUAL_CONST) != 0,
9646 ctype ? ctype : in_namespace);
9647 bad_specifiers (decl, "variable", virtualp,
9648 memfn_quals != TYPE_UNQUALIFIED,
9649 inlinep, friendp, raises != NULL_TREE);
9653 DECL_CONTEXT (decl) = ctype;
9656 permerror (input_location, "%<static%> may not be used when defining "
9657 "(as opposed to declaring) a static data member");
9659 storage_class = sc_none;
9661 if (storage_class == sc_register && TREE_STATIC (decl))
9663 error ("static member %qD declared %<register%>", decl);
9664 storage_class = sc_none;
9666 if (storage_class == sc_extern && pedantic)
9668 pedwarn (input_location, OPT_pedantic,
9669 "cannot explicitly declare member %q#D to have "
9670 "extern linkage", decl);
9671 storage_class = sc_none;
9676 if (storage_class == sc_extern && initialized && !funcdef_flag)
9678 if (toplevel_bindings_p ())
9680 /* It's common practice (and completely valid) to have a const
9681 be initialized and declared extern. */
9682 if (!(type_quals & TYPE_QUAL_CONST))
9683 warning (0, "%qs initialized and declared %<extern%>", name);
9687 error ("%qs has both %<extern%> and initializer", name);
9688 return error_mark_node;
9692 /* Record `register' declaration for warnings on &
9693 and in case doing stupid register allocation. */
9695 if (storage_class == sc_register)
9696 DECL_REGISTER (decl) = 1;
9697 else if (storage_class == sc_extern)
9698 DECL_THIS_EXTERN (decl) = 1;
9699 else if (storage_class == sc_static)
9700 DECL_THIS_STATIC (decl) = 1;
9702 /* Don't forget constexprness. */
9703 if (VAR_OR_FUNCTION_DECL_P (decl))
9704 DECL_DECLARED_CONSTEXPR_P (decl) = constexpr_p;
9706 /* Record constancy and volatility on the DECL itself . There's
9707 no need to do this when processing a template; we'll do this
9708 for the instantiated declaration based on the type of DECL. */
9709 if (!processing_template_decl)
9710 cp_apply_type_quals_to_decl (type_quals, decl);
9716 /* Subroutine of start_function. Ensure that each of the parameter
9717 types (as listed in PARMS) is complete, as is required for a
9718 function definition. */
9721 require_complete_types_for_parms (tree parms)
9723 for (; parms; parms = TREE_CHAIN (parms))
9725 if (dependent_type_p (TREE_TYPE (parms)))
9727 if (!VOID_TYPE_P (TREE_TYPE (parms))
9728 && complete_type_or_else (TREE_TYPE (parms), parms))
9730 relayout_decl (parms);
9731 DECL_ARG_TYPE (parms) = type_passed_as (TREE_TYPE (parms));
9734 /* grokparms or complete_type_or_else will have already issued
9736 TREE_TYPE (parms) = error_mark_node;
9740 /* Returns nonzero if T is a local variable. */
9743 local_variable_p (const_tree t)
9745 if ((TREE_CODE (t) == VAR_DECL
9746 /* A VAR_DECL with a context that is a _TYPE is a static data
9748 && !TYPE_P (CP_DECL_CONTEXT (t))
9749 /* Any other non-local variable must be at namespace scope. */
9750 && !DECL_NAMESPACE_SCOPE_P (t))
9751 || (TREE_CODE (t) == PARM_DECL))
9757 /* Like local_variable_p, but suitable for use as a tree-walking
9761 local_variable_p_walkfn (tree *tp, int *walk_subtrees,
9762 void *data ATTRIBUTE_UNUSED)
9764 if (local_variable_p (*tp) && !DECL_ARTIFICIAL (*tp))
9766 else if (TYPE_P (*tp))
9773 /* Check that ARG, which is a default-argument expression for a
9774 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
9775 something goes wrong. DECL may also be a _TYPE node, rather than a
9776 DECL, if there is no DECL available. */
9779 check_default_argument (tree decl, tree arg)
9784 if (TREE_CODE (arg) == DEFAULT_ARG)
9785 /* We get a DEFAULT_ARG when looking at an in-class declaration
9786 with a default argument. Ignore the argument for now; we'll
9787 deal with it after the class is complete. */
9796 decl_type = TREE_TYPE (decl);
9798 if (arg == error_mark_node
9799 || decl == error_mark_node
9800 || TREE_TYPE (arg) == error_mark_node
9801 || decl_type == error_mark_node)
9802 /* Something already went wrong. There's no need to check
9804 return error_mark_node;
9806 /* [dcl.fct.default]
9808 A default argument expression is implicitly converted to the
9810 if (!TREE_TYPE (arg)
9811 || !can_convert_arg (decl_type, TREE_TYPE (arg), arg, LOOKUP_NORMAL))
9814 error ("default argument for %q#D has type %qT",
9815 decl, TREE_TYPE (arg));
9817 error ("default argument for parameter of type %qT has type %qT",
9818 decl_type, TREE_TYPE (arg));
9820 return error_mark_node;
9823 /* [dcl.fct.default]
9825 Local variables shall not be used in default argument
9828 The keyword `this' shall not be used in a default argument of a
9830 var = cp_walk_tree_without_duplicates (&arg, local_variable_p_walkfn, NULL);
9833 error ("default argument %qE uses local variable %qD", arg, var);
9834 return error_mark_node;
9841 /* Returns a deprecated type used within TYPE, or NULL_TREE if none. */
9844 type_is_deprecated (tree type)
9846 enum tree_code code;
9847 if (TREE_DEPRECATED (type))
9849 if (TYPE_NAME (type)
9850 && TREE_DEPRECATED (TYPE_NAME (type)))
9853 /* Do warn about using typedefs to a deprecated class. */
9854 if (TAGGED_TYPE_P (type) && type != TYPE_MAIN_VARIANT (type))
9855 return type_is_deprecated (TYPE_MAIN_VARIANT (type));
9857 code = TREE_CODE (type);
9859 if (code == POINTER_TYPE || code == REFERENCE_TYPE
9860 || code == OFFSET_TYPE || code == FUNCTION_TYPE
9861 || code == METHOD_TYPE || code == ARRAY_TYPE)
9862 return type_is_deprecated (TREE_TYPE (type));
9864 if (TYPE_PTRMEMFUNC_P (type))
9865 return type_is_deprecated
9866 (TREE_TYPE (TREE_TYPE (TYPE_PTRMEMFUNC_FN_TYPE (type))));
9871 /* Decode the list of parameter types for a function type.
9872 Given the list of things declared inside the parens,
9873 return a list of types.
9875 If this parameter does not end with an ellipsis, we append
9878 *PARMS is set to the chain of PARM_DECLs created. */
9881 grokparms (tree parmlist, tree *parms)
9883 tree result = NULL_TREE;
9884 tree decls = NULL_TREE;
9888 for (parm = parmlist; parm != NULL_TREE; parm = TREE_CHAIN (parm))
9890 tree type = NULL_TREE;
9891 tree init = TREE_PURPOSE (parm);
9892 tree decl = TREE_VALUE (parm);
9895 if (parm == void_list_node)
9898 if (! decl || TREE_TYPE (decl) == error_mark_node)
9901 type = TREE_TYPE (decl);
9902 if (VOID_TYPE_P (type))
9904 if (same_type_p (type, void_type_node)
9905 && DECL_SELF_REFERENCE_P (type)
9906 && !DECL_NAME (decl) && !result && TREE_CHAIN (parm) == void_list_node)
9907 /* this is a parmlist of `(void)', which is ok. */
9909 cxx_incomplete_type_error (decl, type);
9910 /* It's not a good idea to actually create parameters of
9911 type `void'; other parts of the compiler assume that a
9912 void type terminates the parameter list. */
9913 type = error_mark_node;
9914 TREE_TYPE (decl) = error_mark_node;
9917 if (type != error_mark_node
9918 && TYPE_FOR_JAVA (type)
9919 && MAYBE_CLASS_TYPE_P (type))
9921 error ("parameter %qD has Java class type", decl);
9922 type = error_mark_node;
9923 TREE_TYPE (decl) = error_mark_node;
9927 if (type != error_mark_node
9928 && (errmsg = targetm.invalid_parameter_type (type)))
9931 type = error_mark_node;
9932 TREE_TYPE (decl) = error_mark_node;
9935 if (type != error_mark_node)
9937 if (deprecated_state != DEPRECATED_SUPPRESS)
9939 tree deptype = type_is_deprecated (type);
9941 warn_deprecated_use (deptype, NULL_TREE);
9944 /* Top-level qualifiers on the parameters are
9945 ignored for function types. */
9946 type = cp_build_qualified_type (type, 0);
9947 if (TREE_CODE (type) == METHOD_TYPE)
9949 error ("parameter %qD invalidly declared method type", decl);
9950 type = build_pointer_type (type);
9951 TREE_TYPE (decl) = type;
9953 else if (abstract_virtuals_error (decl, type))
9954 any_error = 1; /* Seems like a good idea. */
9955 else if (POINTER_TYPE_P (type))
9957 /* [dcl.fct]/6, parameter types cannot contain pointers
9958 (references) to arrays of unknown bound. */
9959 tree t = TREE_TYPE (type);
9960 int ptr = TYPE_PTR_P (type);
9966 else if (TREE_CODE (t) != ARRAY_TYPE)
9968 else if (!TYPE_DOMAIN (t))
9972 if (TREE_CODE (t) == ARRAY_TYPE)
9974 ? G_("parameter %qD includes pointer to array of "
9975 "unknown bound %qT")
9976 : G_("parameter %qD includes reference to array of "
9977 "unknown bound %qT"),
9983 else if (init && !processing_template_decl)
9984 init = check_default_argument (decl, init);
9987 if (TREE_CODE (decl) == PARM_DECL
9988 && FUNCTION_PARAMETER_PACK_P (decl)
9989 && TREE_CHAIN (parm)
9990 && TREE_CHAIN (parm) != void_list_node)
9991 error ("parameter packs must be at the end of the parameter list");
9993 TREE_CHAIN (decl) = decls;
9995 result = tree_cons (init, type, result);
9997 decls = nreverse (decls);
9998 result = nreverse (result);
10000 result = chainon (result, void_list_node);
10007 /* D is a constructor or overloaded `operator='.
10009 Let T be the class in which D is declared. Then, this function
10012 -1 if D's is an ill-formed constructor or copy assignment operator
10013 whose first parameter is of type `T'.
10014 0 if D is not a copy constructor or copy assignment
10016 1 if D is a copy constructor or copy assignment operator whose
10017 first parameter is a reference to non-const qualified T.
10018 2 if D is a copy constructor or copy assignment operator whose
10019 first parameter is a reference to const qualified T.
10021 This function can be used as a predicate. Positive values indicate
10022 a copy constructor and nonzero values indicate a copy assignment
10026 copy_fn_p (const_tree d)
10032 gcc_assert (DECL_FUNCTION_MEMBER_P (d));
10034 if (TREE_CODE (d) == TEMPLATE_DECL
10035 || (DECL_TEMPLATE_INFO (d)
10036 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d))))
10037 /* Instantiations of template member functions are never copy
10038 functions. Note that member functions of templated classes are
10039 represented as template functions internally, and we must
10040 accept those as copy functions. */
10043 args = FUNCTION_FIRST_USER_PARMTYPE (d);
10047 arg_type = TREE_VALUE (args);
10048 if (arg_type == error_mark_node)
10051 if (TYPE_MAIN_VARIANT (arg_type) == DECL_CONTEXT (d))
10053 /* Pass by value copy assignment operator. */
10056 else if (TREE_CODE (arg_type) == REFERENCE_TYPE
10057 && !TYPE_REF_IS_RVALUE (arg_type)
10058 && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type)) == DECL_CONTEXT (d))
10060 if (CP_TYPE_CONST_P (TREE_TYPE (arg_type)))
10066 args = TREE_CHAIN (args);
10068 if (args && args != void_list_node && !TREE_PURPOSE (args))
10069 /* There are more non-optional args. */
10075 /* D is a constructor or overloaded `operator='.
10077 Let T be the class in which D is declared. Then, this function
10078 returns true when D is a move constructor or move assignment
10079 operator, false otherwise. */
10082 move_fn_p (const_tree d)
10086 bool result = false;
10088 gcc_assert (DECL_FUNCTION_MEMBER_P (d));
10090 if (cxx_dialect == cxx98)
10091 /* There are no move constructors if we are in C++98 mode. */
10094 if (TREE_CODE (d) == TEMPLATE_DECL
10095 || (DECL_TEMPLATE_INFO (d)
10096 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d))))
10097 /* Instantiations of template member functions are never copy
10098 functions. Note that member functions of templated classes are
10099 represented as template functions internally, and we must
10100 accept those as copy functions. */
10103 args = FUNCTION_FIRST_USER_PARMTYPE (d);
10107 arg_type = TREE_VALUE (args);
10108 if (arg_type == error_mark_node)
10111 if (TREE_CODE (arg_type) == REFERENCE_TYPE
10112 && TYPE_REF_IS_RVALUE (arg_type)
10113 && same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (arg_type)),
10117 args = TREE_CHAIN (args);
10119 if (args && args != void_list_node && !TREE_PURPOSE (args))
10120 /* There are more non-optional args. */
10126 /* Remember any special properties of member function DECL. */
10129 grok_special_member_properties (tree decl)
10133 if (!DECL_NONSTATIC_MEMBER_FUNCTION_P (decl))
10136 class_type = DECL_CONTEXT (decl);
10137 if (DECL_CONSTRUCTOR_P (decl))
10139 int ctor = copy_fn_p (decl);
10141 if (!DECL_ARTIFICIAL (decl))
10142 TYPE_HAS_USER_CONSTRUCTOR (class_type) = 1;
10148 A non-template constructor for class X is a copy
10149 constructor if its first parameter is of type X&, const
10150 X&, volatile X& or const volatile X&, and either there
10151 are no other parameters or else all other parameters have
10152 default arguments. */
10153 TYPE_HAS_INIT_REF (class_type) = 1;
10154 if (user_provided_p (decl))
10155 TYPE_HAS_COMPLEX_INIT_REF (class_type) = 1;
10157 TYPE_HAS_CONST_INIT_REF (class_type) = 1;
10159 else if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl)))
10161 TYPE_HAS_DEFAULT_CONSTRUCTOR (class_type) = 1;
10162 if (user_provided_p (decl))
10163 TYPE_HAS_COMPLEX_DFLT (class_type) = 1;
10165 else if (is_list_ctor (decl))
10166 TYPE_HAS_LIST_CTOR (class_type) = 1;
10168 else if (DECL_OVERLOADED_OPERATOR_P (decl) == NOP_EXPR)
10172 A non-template assignment operator for class X is a copy
10173 assignment operator if its parameter is of type X, X&, const
10174 X&, volatile X& or const volatile X&. */
10176 int assop = copy_fn_p (decl);
10180 TYPE_HAS_ASSIGN_REF (class_type) = 1;
10181 if (user_provided_p (decl))
10182 TYPE_HAS_COMPLEX_ASSIGN_REF (class_type) = 1;
10184 TYPE_HAS_CONST_ASSIGN_REF (class_type) = 1;
10189 /* Check a constructor DECL has the correct form. Complains
10190 if the class has a constructor of the form X(X). */
10193 grok_ctor_properties (const_tree ctype, const_tree decl)
10195 int ctor_parm = copy_fn_p (decl);
10201 A declaration of a constructor for a class X is ill-formed if
10202 its first parameter is of type (optionally cv-qualified) X
10203 and either there are no other parameters or else all other
10204 parameters have default arguments.
10206 We *don't* complain about member template instantiations that
10207 have this form, though; they can occur as we try to decide
10208 what constructor to use during overload resolution. Since
10209 overload resolution will never prefer such a constructor to
10210 the non-template copy constructor (which is either explicitly
10211 or implicitly defined), there's no need to worry about their
10212 existence. Theoretically, they should never even be
10213 instantiated, but that's hard to forestall. */
10214 error ("invalid constructor; you probably meant %<%T (const %T&)%>",
10222 /* An operator with this code is unary, but can also be binary. */
10225 ambi_op_p (enum tree_code code)
10227 return (code == INDIRECT_REF
10228 || code == ADDR_EXPR
10229 || code == UNARY_PLUS_EXPR
10230 || code == NEGATE_EXPR
10231 || code == PREINCREMENT_EXPR
10232 || code == PREDECREMENT_EXPR);
10235 /* An operator with this name can only be unary. */
10238 unary_op_p (enum tree_code code)
10240 return (code == TRUTH_NOT_EXPR
10241 || code == BIT_NOT_EXPR
10242 || code == COMPONENT_REF
10243 || code == TYPE_EXPR);
10246 /* DECL is a declaration for an overloaded operator. If COMPLAIN is true,
10247 errors are issued for invalid declarations. */
10250 grok_op_properties (tree decl, bool complain)
10252 tree argtypes = TYPE_ARG_TYPES (TREE_TYPE (decl));
10254 int methodp = (TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE);
10255 tree name = DECL_NAME (decl);
10256 enum tree_code operator_code;
10261 /* Count the number of arguments and check for ellipsis. */
10262 for (argtype = argtypes, arity = 0;
10263 argtype && argtype != void_list_node;
10264 argtype = TREE_CHAIN (argtype))
10266 ellipsis_p = !argtype;
10268 class_type = DECL_CONTEXT (decl);
10269 if (class_type && !CLASS_TYPE_P (class_type))
10270 class_type = NULL_TREE;
10272 if (DECL_CONV_FN_P (decl))
10273 operator_code = TYPE_EXPR;
10277 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
10278 if (ansi_opname (CODE) == name) \
10280 operator_code = (CODE); \
10283 else if (ansi_assopname (CODE) == name) \
10285 operator_code = (CODE); \
10286 DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
10290 #include "operators.def"
10291 #undef DEF_OPERATOR
10293 gcc_unreachable ();
10296 gcc_assert (operator_code != MAX_TREE_CODES);
10297 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
10300 switch (operator_code)
10303 TYPE_HAS_NEW_OPERATOR (class_type) = 1;
10307 TYPE_GETS_DELETE (class_type) |= 1;
10311 TYPE_HAS_ARRAY_NEW_OPERATOR (class_type) = 1;
10314 case VEC_DELETE_EXPR:
10315 TYPE_GETS_DELETE (class_type) |= 2;
10322 /* [basic.std.dynamic.allocation]/1:
10324 A program is ill-formed if an allocation function is declared
10325 in a namespace scope other than global scope or declared static
10328 The same also holds true for deallocation functions. */
10329 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR
10330 || operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
10332 if (DECL_NAMESPACE_SCOPE_P (decl))
10334 if (CP_DECL_CONTEXT (decl) != global_namespace)
10336 error ("%qD may not be declared within a namespace", decl);
10339 else if (!TREE_PUBLIC (decl))
10341 error ("%qD may not be declared as static", decl);
10347 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR)
10349 TREE_TYPE (decl) = coerce_new_type (TREE_TYPE (decl));
10350 DECL_IS_OPERATOR_NEW (decl) = 1;
10352 else if (operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
10353 TREE_TYPE (decl) = coerce_delete_type (TREE_TYPE (decl));
10356 /* An operator function must either be a non-static member function
10357 or have at least one parameter of a class, a reference to a class,
10358 an enumeration, or a reference to an enumeration. 13.4.0.6 */
10359 if (! methodp || DECL_STATIC_FUNCTION_P (decl))
10361 if (operator_code == TYPE_EXPR
10362 || operator_code == CALL_EXPR
10363 || operator_code == COMPONENT_REF
10364 || operator_code == ARRAY_REF
10365 || operator_code == NOP_EXPR)
10367 error ("%qD must be a nonstatic member function", decl);
10374 if (DECL_STATIC_FUNCTION_P (decl))
10376 error ("%qD must be either a non-static member "
10377 "function or a non-member function", decl);
10381 for (p = argtypes; p && p != void_list_node; p = TREE_CHAIN (p))
10383 tree arg = non_reference (TREE_VALUE (p));
10384 if (arg == error_mark_node)
10387 /* MAYBE_CLASS_TYPE_P, rather than CLASS_TYPE_P, is used
10388 because these checks are performed even on
10389 template functions. */
10390 if (MAYBE_CLASS_TYPE_P (arg)
10391 || TREE_CODE (arg) == ENUMERAL_TYPE)
10395 if (!p || p == void_list_node)
10398 error ("%qD must have an argument of class or "
10399 "enumerated type", decl);
10405 /* There are no restrictions on the arguments to an overloaded
10407 if (operator_code == CALL_EXPR)
10410 /* Warn about conversion operators that will never be used. */
10411 if (IDENTIFIER_TYPENAME_P (name)
10412 && ! DECL_TEMPLATE_INFO (decl)
10414 /* Warn only declaring the function; there is no need to
10415 warn again about out-of-class definitions. */
10416 && class_type == current_class_type)
10418 tree t = TREE_TYPE (name);
10419 int ref = (TREE_CODE (t) == REFERENCE_TYPE);
10422 t = TYPE_MAIN_VARIANT (TREE_TYPE (t));
10424 if (TREE_CODE (t) == VOID_TYPE)
10425 warning (OPT_Wconversion,
10427 ? G_("conversion to a reference to void "
10428 "will never use a type conversion operator")
10429 : G_("conversion to void "
10430 "will never use a type conversion operator"));
10431 else if (class_type)
10433 if (t == class_type)
10434 warning (OPT_Wconversion,
10436 ? G_("conversion to a reference to the same type "
10437 "will never use a type conversion operator")
10438 : G_("conversion to the same type "
10439 "will never use a type conversion operator"));
10440 /* Don't force t to be complete here. */
10441 else if (MAYBE_CLASS_TYPE_P (t)
10442 && COMPLETE_TYPE_P (t)
10443 && DERIVED_FROM_P (t, class_type))
10444 warning (OPT_Wconversion,
10446 ? G_("conversion to a reference to a base class "
10447 "will never use a type conversion operator")
10448 : G_("conversion to a base class "
10449 "will never use a type conversion operator"));
10454 if (operator_code == COND_EXPR)
10457 error ("ISO C++ prohibits overloading operator ?:");
10460 else if (ellipsis_p)
10462 error ("%qD must not have variable number of arguments", decl);
10465 else if (ambi_op_p (operator_code))
10468 /* We pick the one-argument operator codes by default, so
10469 we don't have to change anything. */
10471 else if (arity == 2)
10473 /* If we thought this was a unary operator, we now know
10474 it to be a binary operator. */
10475 switch (operator_code)
10478 operator_code = MULT_EXPR;
10482 operator_code = BIT_AND_EXPR;
10485 case UNARY_PLUS_EXPR:
10486 operator_code = PLUS_EXPR;
10490 operator_code = MINUS_EXPR;
10493 case PREINCREMENT_EXPR:
10494 operator_code = POSTINCREMENT_EXPR;
10497 case PREDECREMENT_EXPR:
10498 operator_code = POSTDECREMENT_EXPR;
10502 gcc_unreachable ();
10505 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
10507 if ((operator_code == POSTINCREMENT_EXPR
10508 || operator_code == POSTDECREMENT_EXPR)
10509 && ! processing_template_decl
10510 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes)), integer_type_node))
10513 error ("postfix %qD must take %<int%> as its argument",
10516 error ("postfix %qD must take %<int%> as its second "
10524 error ("%qD must take either zero or one argument", decl);
10526 error ("%qD must take either one or two arguments", decl);
10530 /* More Effective C++ rule 6. */
10532 && (operator_code == POSTINCREMENT_EXPR
10533 || operator_code == POSTDECREMENT_EXPR
10534 || operator_code == PREINCREMENT_EXPR
10535 || operator_code == PREDECREMENT_EXPR))
10537 tree arg = TREE_VALUE (argtypes);
10538 tree ret = TREE_TYPE (TREE_TYPE (decl));
10539 if (methodp || TREE_CODE (arg) == REFERENCE_TYPE)
10540 arg = TREE_TYPE (arg);
10541 arg = TYPE_MAIN_VARIANT (arg);
10542 if (operator_code == PREINCREMENT_EXPR
10543 || operator_code == PREDECREMENT_EXPR)
10545 if (TREE_CODE (ret) != REFERENCE_TYPE
10546 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret)),
10548 warning (OPT_Weffc__, "prefix %qD should return %qT", decl,
10549 build_reference_type (arg));
10553 if (!same_type_p (TYPE_MAIN_VARIANT (ret), arg))
10554 warning (OPT_Weffc__, "postfix %qD should return %qT", decl, arg);
10558 else if (unary_op_p (operator_code))
10563 error ("%qD must take %<void%>", decl);
10565 error ("%qD must take exactly one argument", decl);
10569 else /* if (binary_op_p (operator_code)) */
10574 error ("%qD must take exactly one argument", decl);
10576 error ("%qD must take exactly two arguments", decl);
10580 /* More Effective C++ rule 7. */
10582 && (operator_code == TRUTH_ANDIF_EXPR
10583 || operator_code == TRUTH_ORIF_EXPR
10584 || operator_code == COMPOUND_EXPR))
10585 warning (OPT_Weffc__, "user-defined %qD always evaluates both arguments",
10589 /* Effective C++ rule 23. */
10592 && !DECL_ASSIGNMENT_OPERATOR_P (decl)
10593 && (operator_code == PLUS_EXPR
10594 || operator_code == MINUS_EXPR
10595 || operator_code == TRUNC_DIV_EXPR
10596 || operator_code == MULT_EXPR
10597 || operator_code == TRUNC_MOD_EXPR)
10598 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl))) == REFERENCE_TYPE)
10599 warning (OPT_Weffc__, "%qD should return by value", decl);
10601 /* [over.oper]/8 */
10602 for (; argtypes && argtypes != void_list_node;
10603 argtypes = TREE_CHAIN (argtypes))
10604 if (TREE_PURPOSE (argtypes))
10606 TREE_PURPOSE (argtypes) = NULL_TREE;
10607 if (operator_code == POSTINCREMENT_EXPR
10608 || operator_code == POSTDECREMENT_EXPR)
10610 pedwarn (input_location, OPT_pedantic, "%qD cannot have default arguments",
10615 error ("%qD cannot have default arguments", decl);
10623 /* Return a string giving the keyword associate with CODE. */
10625 static const char *
10626 tag_name (enum tag_types code)
10638 case typename_type:
10641 gcc_unreachable ();
10645 /* Name lookup in an elaborated-type-specifier (after the keyword
10646 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
10647 elaborated-type-specifier is invalid, issue a diagnostic and return
10648 error_mark_node; otherwise, return the *_TYPE to which it referred.
10649 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
10652 check_elaborated_type_specifier (enum tag_types tag_code,
10654 bool allow_template_p)
10660 struct S { struct S *p; };
10662 name lookup will find the TYPE_DECL for the implicit "S::S"
10663 typedef. Adjust for that here. */
10664 if (DECL_SELF_REFERENCE_P (decl))
10665 decl = TYPE_NAME (TREE_TYPE (decl));
10667 type = TREE_TYPE (decl);
10669 /* Check TEMPLATE_TYPE_PARM first because DECL_IMPLICIT_TYPEDEF_P
10670 is false for this case as well. */
10671 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
10673 error ("using template type parameter %qT after %qs",
10674 type, tag_name (tag_code));
10675 return error_mark_node;
10679 If the identifier resolves to a typedef-name or a template
10680 type-parameter, the elaborated-type-specifier is ill-formed.
10682 In other words, the only legitimate declaration to use in the
10683 elaborated type specifier is the implicit typedef created when
10684 the type is declared. */
10685 else if (!DECL_IMPLICIT_TYPEDEF_P (decl)
10686 && !DECL_SELF_REFERENCE_P (decl)
10687 && tag_code != typename_type)
10689 error ("using typedef-name %qD after %qs", decl, tag_name (tag_code));
10690 error ("%q+D has a previous declaration here", decl);
10691 return error_mark_node;
10693 else if (TREE_CODE (type) != RECORD_TYPE
10694 && TREE_CODE (type) != UNION_TYPE
10695 && tag_code != enum_type
10696 && tag_code != typename_type)
10698 error ("%qT referred to as %qs", type, tag_name (tag_code));
10699 error ("%q+T has a previous declaration here", type);
10700 return error_mark_node;
10702 else if (TREE_CODE (type) != ENUMERAL_TYPE
10703 && tag_code == enum_type)
10705 error ("%qT referred to as enum", type);
10706 error ("%q+T has a previous declaration here", type);
10707 return error_mark_node;
10709 else if (!allow_template_p
10710 && TREE_CODE (type) == RECORD_TYPE
10711 && CLASSTYPE_IS_TEMPLATE (type))
10713 /* If a class template appears as elaborated type specifier
10714 without a template header such as:
10716 template <class T> class C {};
10717 void f(class C); // No template header here
10719 then the required template argument is missing. */
10720 error ("template argument required for %<%s %T%>",
10721 tag_name (tag_code),
10722 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type)));
10723 return error_mark_node;
10729 /* Lookup NAME in elaborate type specifier in scope according to
10730 SCOPE and issue diagnostics if necessary.
10731 Return *_TYPE node upon success, NULL_TREE when the NAME is not
10732 found, and ERROR_MARK_NODE for type error. */
10735 lookup_and_check_tag (enum tag_types tag_code, tree name,
10736 tag_scope scope, bool template_header_p)
10740 if (scope == ts_global)
10742 /* First try ordinary name lookup, ignoring hidden class name
10743 injected via friend declaration. */
10744 decl = lookup_name_prefer_type (name, 2);
10745 /* If that fails, the name will be placed in the smallest
10746 non-class, non-function-prototype scope according to 3.3.1/5.
10747 We may already have a hidden name declared as friend in this
10748 scope. So lookup again but not ignoring hidden names.
10749 If we find one, that name will be made visible rather than
10750 creating a new tag. */
10752 decl = lookup_type_scope (name, ts_within_enclosing_non_class);
10755 decl = lookup_type_scope (name, scope);
10757 if (decl && DECL_CLASS_TEMPLATE_P (decl))
10758 decl = DECL_TEMPLATE_RESULT (decl);
10760 if (decl && TREE_CODE (decl) == TYPE_DECL)
10762 /* Look for invalid nested type:
10766 if (scope == ts_current && DECL_SELF_REFERENCE_P (decl))
10768 error ("%qD has the same name as the class in which it is "
10771 return error_mark_node;
10774 /* Two cases we need to consider when deciding if a class
10775 template is allowed as an elaborated type specifier:
10776 1. It is a self reference to its own class.
10777 2. It comes with a template header.
10781 template <class T> class C {
10782 class C *c1; // DECL_SELF_REFERENCE_P is true
10785 template <class U> class C; // template_header_p is true
10786 template <class T> class C<T>::D {
10787 class C *c2; // DECL_SELF_REFERENCE_P is true
10790 t = check_elaborated_type_specifier (tag_code,
10793 | DECL_SELF_REFERENCE_P (decl));
10796 else if (decl && TREE_CODE (decl) == TREE_LIST)
10798 error ("reference to %qD is ambiguous", name);
10799 print_candidates (decl);
10800 return error_mark_node;
10806 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
10807 Define the tag as a forward-reference if it is not defined.
10809 If a declaration is given, process it here, and report an error if
10810 multiple declarations are not identical.
10812 SCOPE is TS_CURRENT when this is also a definition. Only look in
10813 the current frame for the name (since C++ allows new names in any
10814 scope.) It is TS_WITHIN_ENCLOSING_NON_CLASS if this is a friend
10815 declaration. Only look beginning from the current scope outward up
10816 till the nearest non-class scope. Otherwise it is TS_GLOBAL.
10818 TEMPLATE_HEADER_P is true when this declaration is preceded by
10819 a set of template parameters. */
10822 xref_tag (enum tag_types tag_code, tree name,
10823 tag_scope scope, bool template_header_p)
10825 enum tree_code code;
10827 tree context = NULL_TREE;
10829 timevar_push (TV_NAME_LOOKUP);
10831 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
10837 code = RECORD_TYPE;
10843 code = ENUMERAL_TYPE;
10846 gcc_unreachable ();
10849 /* In case of anonymous name, xref_tag is only called to
10850 make type node and push name. Name lookup is not required. */
10851 if (ANON_AGGRNAME_P (name))
10854 t = lookup_and_check_tag (tag_code, name,
10855 scope, template_header_p);
10857 if (t == error_mark_node)
10858 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
10860 if (scope != ts_current && t && current_class_type
10861 && template_class_depth (current_class_type)
10862 && template_header_p)
10864 /* Since SCOPE is not TS_CURRENT, we are not looking at a
10865 definition of this tag. Since, in addition, we are currently
10866 processing a (member) template declaration of a template
10867 class, we must be very careful; consider:
10874 { template <class V>
10875 friend struct S1; };
10877 Here, the S2::S1 declaration should not be confused with the
10878 outer declaration. In particular, the inner version should
10879 have a template parameter of level 2, not level 1. This
10880 would be particularly important if the member declaration
10883 template <class V = U> friend struct S1;
10885 say, when we should tsubst into `U' when instantiating
10886 S2. On the other hand, when presented with:
10896 we must find the inner binding eventually. We
10897 accomplish this by making sure that the new type we
10898 create to represent this declaration has the right
10900 context = TYPE_CONTEXT (t);
10906 /* If no such tag is yet defined, create a forward-reference node
10907 and record it as the "definition".
10908 When a real declaration of this type is found,
10909 the forward-reference will be altered into a real type. */
10910 if (code == ENUMERAL_TYPE)
10912 error ("use of enum %q#D without previous declaration", name);
10913 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
10917 t = make_class_type (code);
10918 TYPE_CONTEXT (t) = context;
10919 t = pushtag (name, t, scope);
10924 if (template_header_p && MAYBE_CLASS_TYPE_P (t))
10926 if (!redeclare_class_template (t, current_template_parms))
10927 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
10929 else if (!processing_template_decl
10930 && CLASS_TYPE_P (t)
10931 && CLASSTYPE_IS_TEMPLATE (t))
10933 error ("redeclaration of %qT as a non-template", t);
10934 error ("previous declaration %q+D", t);
10935 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
10938 /* Make injected friend class visible. */
10939 if (scope != ts_within_enclosing_non_class
10940 && hidden_name_p (TYPE_NAME (t)))
10942 DECL_ANTICIPATED (TYPE_NAME (t)) = 0;
10943 DECL_FRIEND_P (TYPE_NAME (t)) = 0;
10945 if (TYPE_TEMPLATE_INFO (t))
10947 DECL_ANTICIPATED (TYPE_TI_TEMPLATE (t)) = 0;
10948 DECL_FRIEND_P (TYPE_TI_TEMPLATE (t)) = 0;
10953 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, t);
10957 xref_tag_from_type (tree old, tree id, tag_scope scope)
10959 enum tag_types tag_kind;
10961 if (TREE_CODE (old) == RECORD_TYPE)
10962 tag_kind = (CLASSTYPE_DECLARED_CLASS (old) ? class_type : record_type);
10964 tag_kind = union_type;
10966 if (id == NULL_TREE)
10967 id = TYPE_IDENTIFIER (old);
10969 return xref_tag (tag_kind, id, scope, false);
10972 /* Create the binfo hierarchy for REF with (possibly NULL) base list
10973 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
10974 access_* node, and the TREE_VALUE is the type of the base-class.
10975 Non-NULL TREE_TYPE indicates virtual inheritance.
10977 Returns true if the binfo hierarchy was successfully created,
10978 false if an error was detected. */
10981 xref_basetypes (tree ref, tree base_list)
10984 tree binfo, base_binfo;
10985 unsigned max_vbases = 0; /* Maximum direct & indirect virtual bases. */
10986 unsigned max_bases = 0; /* Maximum direct bases. */
10988 tree default_access;
10989 tree igo_prev; /* Track Inheritance Graph Order. */
10991 if (ref == error_mark_node)
10994 /* The base of a derived class is private by default, all others are
10996 default_access = (TREE_CODE (ref) == RECORD_TYPE
10997 && CLASSTYPE_DECLARED_CLASS (ref)
10998 ? access_private_node : access_public_node);
11000 /* First, make sure that any templates in base-classes are
11001 instantiated. This ensures that if we call ourselves recursively
11002 we do not get confused about which classes are marked and which
11004 basep = &base_list;
11007 tree basetype = TREE_VALUE (*basep);
11009 if (!(processing_template_decl && uses_template_parms (basetype))
11010 && !complete_type_or_else (basetype, NULL))
11011 /* An incomplete type. Remove it from the list. */
11012 *basep = TREE_CHAIN (*basep);
11016 if (TREE_TYPE (*basep))
11018 if (CLASS_TYPE_P (basetype))
11019 max_vbases += VEC_length (tree, CLASSTYPE_VBASECLASSES (basetype));
11020 basep = &TREE_CHAIN (*basep);
11024 TYPE_MARKED_P (ref) = 1;
11026 /* The binfo slot should be empty, unless this is an (ill-formed)
11028 if (TYPE_BINFO (ref) && !TYPE_SIZE (ref))
11030 error ("redefinition of %q#T", ref);
11034 gcc_assert (TYPE_MAIN_VARIANT (ref) == ref);
11036 binfo = make_tree_binfo (max_bases);
11038 TYPE_BINFO (ref) = binfo;
11039 BINFO_OFFSET (binfo) = size_zero_node;
11040 BINFO_TYPE (binfo) = ref;
11042 /* Apply base-class info set up to the variants of this type. */
11043 fixup_type_variants (ref);
11047 BINFO_BASE_ACCESSES (binfo) = VEC_alloc (tree, gc, max_bases);
11048 /* An aggregate cannot have baseclasses. */
11049 CLASSTYPE_NON_AGGREGATE (ref) = 1;
11051 if (TREE_CODE (ref) == UNION_TYPE)
11053 error ("derived union %qT invalid", ref);
11060 if (TYPE_FOR_JAVA (ref))
11062 error ("Java class %qT cannot have multiple bases", ref);
11069 CLASSTYPE_VBASECLASSES (ref) = VEC_alloc (tree, gc, max_vbases);
11071 if (TYPE_FOR_JAVA (ref))
11073 error ("Java class %qT cannot have virtual bases", ref);
11078 for (igo_prev = binfo; base_list; base_list = TREE_CHAIN (base_list))
11080 tree access = TREE_PURPOSE (base_list);
11081 int via_virtual = TREE_TYPE (base_list) != NULL_TREE;
11082 tree basetype = TREE_VALUE (base_list);
11084 if (access == access_default_node)
11085 access = default_access;
11087 if (PACK_EXPANSION_P (basetype))
11088 basetype = PACK_EXPANSION_PATTERN (basetype);
11089 if (TREE_CODE (basetype) == TYPE_DECL)
11090 basetype = TREE_TYPE (basetype);
11091 if (!MAYBE_CLASS_TYPE_P (basetype) || TREE_CODE (basetype) == UNION_TYPE)
11093 error ("base type %qT fails to be a struct or class type",
11098 if (TYPE_FOR_JAVA (basetype) && (current_lang_depth () == 0))
11099 TYPE_FOR_JAVA (ref) = 1;
11101 base_binfo = NULL_TREE;
11102 if (CLASS_TYPE_P (basetype) && !dependent_type_p (basetype))
11104 base_binfo = TYPE_BINFO (basetype);
11105 /* The original basetype could have been a typedef'd type. */
11106 basetype = BINFO_TYPE (base_binfo);
11108 /* Inherit flags from the base. */
11109 TYPE_HAS_NEW_OPERATOR (ref)
11110 |= TYPE_HAS_NEW_OPERATOR (basetype);
11111 TYPE_HAS_ARRAY_NEW_OPERATOR (ref)
11112 |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype);
11113 TYPE_GETS_DELETE (ref) |= TYPE_GETS_DELETE (basetype);
11114 TYPE_HAS_CONVERSION (ref) |= TYPE_HAS_CONVERSION (basetype);
11115 CLASSTYPE_DIAMOND_SHAPED_P (ref)
11116 |= CLASSTYPE_DIAMOND_SHAPED_P (basetype);
11117 CLASSTYPE_REPEATED_BASE_P (ref)
11118 |= CLASSTYPE_REPEATED_BASE_P (basetype);
11121 /* We must do this test after we've seen through a typedef
11123 if (TYPE_MARKED_P (basetype))
11125 if (basetype == ref)
11126 error ("recursive type %qT undefined", basetype);
11128 error ("duplicate base type %qT invalid", basetype);
11132 if (PACK_EXPANSION_P (TREE_VALUE (base_list)))
11133 /* Regenerate the pack expansion for the bases. */
11134 basetype = make_pack_expansion (basetype);
11136 TYPE_MARKED_P (basetype) = 1;
11138 base_binfo = copy_binfo (base_binfo, basetype, ref,
11139 &igo_prev, via_virtual);
11140 if (!BINFO_INHERITANCE_CHAIN (base_binfo))
11141 BINFO_INHERITANCE_CHAIN (base_binfo) = binfo;
11143 BINFO_BASE_APPEND (binfo, base_binfo);
11144 BINFO_BASE_ACCESS_APPEND (binfo, access);
11147 if (VEC_space (tree, CLASSTYPE_VBASECLASSES (ref), 1))
11148 /* If we have space in the vbase vector, we must have shared at
11149 least one of them, and are therefore diamond shaped. */
11150 CLASSTYPE_DIAMOND_SHAPED_P (ref) = 1;
11152 /* Unmark all the types. */
11153 for (i = 0; BINFO_BASE_ITERATE (binfo, i, base_binfo); i++)
11154 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
11155 TYPE_MARKED_P (ref) = 0;
11157 /* Now see if we have a repeated base type. */
11158 if (!CLASSTYPE_REPEATED_BASE_P (ref))
11160 for (base_binfo = binfo; base_binfo;
11161 base_binfo = TREE_CHAIN (base_binfo))
11163 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
11165 CLASSTYPE_REPEATED_BASE_P (ref) = 1;
11168 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 1;
11170 for (base_binfo = binfo; base_binfo;
11171 base_binfo = TREE_CHAIN (base_binfo))
11172 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
11173 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
11182 /* Begin compiling the definition of an enumeration type.
11185 UNDERLYING_TYPE is the type that will be used as the storage for
11186 the enumeration type. This should be NULL_TREE if no storage type
11189 SCOPED_ENUM_P is true if this is a scoped enumeration type.
11191 Returns the type object, as yet incomplete.
11192 Also records info about it so that build_enumerator
11193 may be used to declare the individual values as they are read. */
11196 start_enum (tree name, tree underlying_type, bool scoped_enum_p)
11200 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
11202 /* If this is the real definition for a previous forward reference,
11203 fill in the contents in the same object that used to be the
11204 forward reference. */
11206 enumtype = lookup_and_check_tag (enum_type, name,
11207 /*tag_scope=*/ts_current,
11208 /*template_header_p=*/false);
11210 if (enumtype != NULL_TREE && TREE_CODE (enumtype) == ENUMERAL_TYPE)
11212 error_at (input_location, "multiple definition of %q#T", enumtype);
11213 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype)),
11214 "previous definition here");
11215 /* Clear out TYPE_VALUES, and start again. */
11216 TYPE_VALUES (enumtype) = NULL_TREE;
11220 /* In case of error, make a dummy enum to allow parsing to
11222 if (enumtype == error_mark_node)
11223 name = make_anon_name ();
11225 enumtype = cxx_make_type (ENUMERAL_TYPE);
11226 enumtype = pushtag (name, enumtype, /*tag_scope=*/ts_current);
11229 if (enumtype == error_mark_node)
11234 SET_SCOPED_ENUM_P (enumtype, 1);
11235 begin_scope (sk_scoped_enum, enumtype);
11237 /* [C++0x dcl.enum]p5:
11239 If not explicitly specified, the underlying type of a scoped
11240 enumeration type is int. */
11241 if (!underlying_type)
11242 underlying_type = integer_type_node;
11245 if (underlying_type)
11247 if (CP_INTEGRAL_TYPE_P (underlying_type))
11249 TYPE_MIN_VALUE (enumtype) = TYPE_MIN_VALUE (underlying_type);
11250 TYPE_MAX_VALUE (enumtype) = TYPE_MAX_VALUE (underlying_type);
11251 TYPE_SIZE (enumtype) = TYPE_SIZE (underlying_type);
11252 TYPE_SIZE_UNIT (enumtype) = TYPE_SIZE_UNIT (underlying_type);
11253 SET_TYPE_MODE (enumtype, TYPE_MODE (underlying_type));
11254 TYPE_PRECISION (enumtype) = TYPE_PRECISION (underlying_type);
11255 TYPE_ALIGN (enumtype) = TYPE_ALIGN (underlying_type);
11256 TYPE_USER_ALIGN (enumtype) = TYPE_USER_ALIGN (underlying_type);
11257 TYPE_UNSIGNED (enumtype) = TYPE_UNSIGNED (underlying_type);
11258 ENUM_UNDERLYING_TYPE (enumtype) = underlying_type;
11260 else if (!dependent_type_p (underlying_type))
11261 error ("underlying type %<%T%> of %<%T%> must be an integral type",
11262 underlying_type, enumtype);
11268 /* After processing and defining all the values of an enumeration type,
11269 install their decls in the enumeration type and finish it off.
11270 ENUMTYPE is the type object and VALUES a list of name-value pairs. */
11273 finish_enum (tree enumtype)
11281 tree underlying_type = NULL_TREE;
11282 bool fixed_underlying_type_p
11283 = ENUM_UNDERLYING_TYPE (enumtype) != NULL_TREE;
11285 /* We built up the VALUES in reverse order. */
11286 TYPE_VALUES (enumtype) = nreverse (TYPE_VALUES (enumtype));
11288 /* For an enum defined in a template, just set the type of the values;
11289 all further processing is postponed until the template is
11290 instantiated. We need to set the type so that tsubst of a CONST_DECL
11292 if (processing_template_decl)
11294 for (values = TYPE_VALUES (enumtype);
11296 values = TREE_CHAIN (values))
11297 TREE_TYPE (TREE_VALUE (values)) = enumtype;
11298 if (at_function_scope_p ())
11299 add_stmt (build_min (TAG_DEFN, enumtype));
11300 if (SCOPED_ENUM_P (enumtype))
11305 /* Determine the minimum and maximum values of the enumerators. */
11306 if (TYPE_VALUES (enumtype))
11308 minnode = maxnode = NULL_TREE;
11310 for (values = TYPE_VALUES (enumtype);
11312 values = TREE_CHAIN (values))
11314 decl = TREE_VALUE (values);
11316 /* [dcl.enum]: Following the closing brace of an enum-specifier,
11317 each enumerator has the type of its enumeration. Prior to the
11318 closing brace, the type of each enumerator is the type of its
11319 initializing value. */
11320 TREE_TYPE (decl) = enumtype;
11322 /* Update the minimum and maximum values, if appropriate. */
11323 value = DECL_INITIAL (decl);
11324 if (value == error_mark_node)
11325 value = integer_zero_node;
11326 /* Figure out what the minimum and maximum values of the
11327 enumerators are. */
11329 minnode = maxnode = value;
11330 else if (tree_int_cst_lt (maxnode, value))
11332 else if (tree_int_cst_lt (value, minnode))
11339 If the enumerator-list is empty, the underlying type is as if
11340 the enumeration had a single enumerator with value 0. */
11341 minnode = maxnode = integer_zero_node;
11343 if (!fixed_underlying_type_p)
11345 /* Compute the number of bits require to represent all values of the
11346 enumeration. We must do this before the type of MINNODE and
11347 MAXNODE are transformed, since tree_int_cst_min_precision relies
11348 on the TREE_TYPE of the value it is passed. */
11349 bool unsignedp = tree_int_cst_sgn (minnode) >= 0;
11350 int lowprec = tree_int_cst_min_precision (minnode, unsignedp);
11351 int highprec = tree_int_cst_min_precision (maxnode, unsignedp);
11352 int precision = MAX (lowprec, highprec);
11354 bool use_short_enum;
11356 /* Determine the underlying type of the enumeration.
11360 The underlying type of an enumeration is an integral type that
11361 can represent all the enumerator values defined in the
11362 enumeration. It is implementation-defined which integral type is
11363 used as the underlying type for an enumeration except that the
11364 underlying type shall not be larger than int unless the value of
11365 an enumerator cannot fit in an int or unsigned int.
11367 We use "int" or an "unsigned int" as the underlying type, even if
11368 a smaller integral type would work, unless the user has
11369 explicitly requested that we use the smallest possible type. The
11370 user can request that for all enumerations with a command line
11371 flag, or for just one enumeration with an attribute. */
11373 use_short_enum = flag_short_enums
11374 || lookup_attribute ("packed", TYPE_ATTRIBUTES (enumtype));
11376 for (itk = (use_short_enum ? itk_char : itk_int);
11380 underlying_type = integer_types[itk];
11381 if (TYPE_PRECISION (underlying_type) >= precision
11382 && TYPE_UNSIGNED (underlying_type) == unsignedp)
11385 if (itk == itk_none)
11389 IF no integral type can represent all the enumerator values, the
11390 enumeration is ill-formed. */
11391 error ("no integral type can represent all of the enumerator values "
11392 "for %qT", enumtype);
11393 precision = TYPE_PRECISION (long_long_integer_type_node);
11394 underlying_type = integer_types[itk_unsigned_long_long];
11399 The value of sizeof() applied to an enumeration type, an object
11400 of an enumeration type, or an enumerator, is the value of sizeof()
11401 applied to the underlying type. */
11402 TYPE_MIN_VALUE (enumtype) = TYPE_MIN_VALUE (underlying_type);
11403 TYPE_MAX_VALUE (enumtype) = TYPE_MAX_VALUE (underlying_type);
11404 TYPE_SIZE (enumtype) = TYPE_SIZE (underlying_type);
11405 TYPE_SIZE_UNIT (enumtype) = TYPE_SIZE_UNIT (underlying_type);
11406 SET_TYPE_MODE (enumtype, TYPE_MODE (underlying_type));
11407 TYPE_PRECISION (enumtype) = TYPE_PRECISION (underlying_type);
11408 TYPE_ALIGN (enumtype) = TYPE_ALIGN (underlying_type);
11409 TYPE_USER_ALIGN (enumtype) = TYPE_USER_ALIGN (underlying_type);
11410 TYPE_UNSIGNED (enumtype) = TYPE_UNSIGNED (underlying_type);
11412 /* Compute the minimum and maximum values for the type.
11416 For an enumeration where emin is the smallest enumerator and emax
11417 is the largest, the values of the enumeration are the values of the
11418 underlying type in the range bmin to bmax, where bmin and bmax are,
11419 respectively, the smallest and largest values of the smallest bit-
11420 field that can store emin and emax. */
11422 /* The middle-end currently assumes that types with TYPE_PRECISION
11423 narrower than their underlying type are suitably zero or sign
11424 extended to fill their mode. Similarly, it assumes that the front
11425 end assures that a value of a particular type must be within
11426 TYPE_MIN_VALUE and TYPE_MAX_VALUE.
11428 We used to set these fields based on bmin and bmax, but that led
11429 to invalid assumptions like optimizing away bounds checking. So
11430 now we just set the TYPE_PRECISION, TYPE_MIN_VALUE, and
11431 TYPE_MAX_VALUE to the values for the mode above and only restrict
11432 the ENUM_UNDERLYING_TYPE for the benefit of diagnostics. */
11433 ENUM_UNDERLYING_TYPE (enumtype)
11434 = build_distinct_type_copy (underlying_type);
11435 TYPE_PRECISION (ENUM_UNDERLYING_TYPE (enumtype)) = precision;
11436 set_min_and_max_values_for_integral_type
11437 (ENUM_UNDERLYING_TYPE (enumtype), precision, unsignedp);
11439 /* If -fstrict-enums, still constrain TYPE_MIN/MAX_VALUE. */
11440 if (flag_strict_enums)
11441 set_min_and_max_values_for_integral_type (enumtype, precision,
11445 underlying_type = ENUM_UNDERLYING_TYPE (enumtype);
11447 /* Convert each of the enumerators to the type of the underlying
11448 type of the enumeration. */
11449 for (values = TYPE_VALUES (enumtype); values; values = TREE_CHAIN (values))
11451 location_t saved_location;
11453 decl = TREE_VALUE (values);
11454 saved_location = input_location;
11455 input_location = DECL_SOURCE_LOCATION (decl);
11456 if (fixed_underlying_type_p)
11457 /* If the enumeration type has a fixed underlying type, we
11458 already checked all of the enumerator values. */
11459 value = DECL_INITIAL (decl);
11461 value = perform_implicit_conversion (underlying_type,
11462 DECL_INITIAL (decl),
11463 tf_warning_or_error);
11464 input_location = saved_location;
11466 /* Do not clobber shared ints. */
11467 value = copy_node (value);
11469 TREE_TYPE (value) = enumtype;
11470 DECL_INITIAL (decl) = value;
11473 /* Fix up all variant types of this enum type. */
11474 for (t = TYPE_MAIN_VARIANT (enumtype); t; t = TYPE_NEXT_VARIANT (t))
11476 TYPE_VALUES (t) = TYPE_VALUES (enumtype);
11477 TYPE_MIN_VALUE (t) = TYPE_MIN_VALUE (enumtype);
11478 TYPE_MAX_VALUE (t) = TYPE_MAX_VALUE (enumtype);
11479 TYPE_SIZE (t) = TYPE_SIZE (enumtype);
11480 TYPE_SIZE_UNIT (t) = TYPE_SIZE_UNIT (enumtype);
11481 SET_TYPE_MODE (t, TYPE_MODE (enumtype));
11482 TYPE_PRECISION (t) = TYPE_PRECISION (enumtype);
11483 TYPE_ALIGN (t) = TYPE_ALIGN (enumtype);
11484 TYPE_USER_ALIGN (t) = TYPE_USER_ALIGN (enumtype);
11485 TYPE_UNSIGNED (t) = TYPE_UNSIGNED (enumtype);
11486 ENUM_UNDERLYING_TYPE (t) = ENUM_UNDERLYING_TYPE (enumtype);
11489 /* Finish up the scope of a scoped enumeration. */
11490 if (SCOPED_ENUM_P (enumtype))
11493 /* Finish debugging output for this type. */
11494 rest_of_type_compilation (enumtype, namespace_bindings_p ());
11497 /* Build and install a CONST_DECL for an enumeration constant of the
11498 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
11499 Assignment of sequential values by default is handled here. */
11502 build_enumerator (tree name, tree value, tree enumtype)
11508 /* If the VALUE was erroneous, pretend it wasn't there; that will
11509 result in the enum being assigned the next value in sequence. */
11510 if (value == error_mark_node)
11513 /* Remove no-op casts from the value. */
11515 STRIP_TYPE_NOPS (value);
11517 if (! processing_template_decl)
11519 /* Validate and default VALUE. */
11520 if (value != NULL_TREE)
11522 value = integral_constant_value (value);
11524 if (TREE_CODE (value) == INTEGER_CST)
11526 value = perform_integral_promotions (value);
11527 constant_expression_warning (value);
11531 error ("enumerator value for %qD is not an integer constant", name);
11536 /* Default based on previous value. */
11537 if (value == NULL_TREE)
11539 if (TYPE_VALUES (enumtype))
11542 unsigned HOST_WIDE_INT lo;
11546 /* The next value is the previous value plus one.
11547 add_double doesn't know the type of the target expression,
11548 so we must check with int_fits_type_p as well. */
11549 prev_value = DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype)));
11550 if (error_operand_p (prev_value))
11551 value = error_mark_node;
11554 overflowed = add_double (TREE_INT_CST_LOW (prev_value),
11555 TREE_INT_CST_HIGH (prev_value),
11557 value = build_int_cst_wide (TREE_TYPE (prev_value), lo, hi);
11559 |= !int_fits_type_p (value, TREE_TYPE (prev_value));
11563 error ("overflow in enumeration values at %qD", name);
11564 value = error_mark_node;
11569 value = integer_zero_node;
11572 /* Remove no-op casts from the value. */
11573 STRIP_TYPE_NOPS (value);
11575 /* If the underlying type of the enum is fixed, check whether
11576 the enumerator values fits in the underlying type. If it
11577 does not fit, the program is ill-formed [C++0x dcl.enum]. */
11578 if (ENUM_UNDERLYING_TYPE (enumtype)
11580 && TREE_CODE (value) == INTEGER_CST
11581 && !int_fits_type_p (value, ENUM_UNDERLYING_TYPE (enumtype)))
11583 error ("enumerator value %E is too large for underlying type %<%T%>",
11584 value, ENUM_UNDERLYING_TYPE (enumtype));
11586 /* Silently convert the value so that we can continue. */
11587 value = perform_implicit_conversion (ENUM_UNDERLYING_TYPE (enumtype),
11592 /* C++ associates enums with global, function, or class declarations. */
11593 context = current_scope ();
11595 /* Build the actual enumeration constant. Note that the enumeration
11596 constants have the underlying type of the enum (if it is fixed)
11597 or the type of their initializer (if the underlying type of the
11598 enum is not fixed):
11602 If the underlying type is fixed, the type of each enumerator
11603 prior to the closing brace is the underlying type; if the
11604 initializing value of an enumerator cannot be represented by
11605 the underlying type, the program is ill-formed. If the
11606 underlying type is not fixed, the type of each enumerator is
11607 the type of its initializing value.
11609 If the underlying type is not fixed, it will be computed by
11610 finish_enum and we will reset the type of this enumerator. Of
11611 course, if we're processing a template, there may be no value. */
11612 type = value ? TREE_TYPE (value) : NULL_TREE;
11614 if (context && context == current_class_type)
11615 /* This enum declaration is local to the class. We need the full
11616 lang_decl so that we can record DECL_CLASS_CONTEXT, for example. */
11617 decl = build_lang_decl (CONST_DECL, name, type);
11619 /* It's a global enum, or it's local to a function. (Note local to
11620 a function could mean local to a class method. */
11621 decl = build_decl (input_location, CONST_DECL, name, type);
11623 DECL_CONTEXT (decl) = FROB_CONTEXT (context);
11624 TREE_CONSTANT (decl) = 1;
11625 TREE_READONLY (decl) = 1;
11626 DECL_INITIAL (decl) = value;
11628 if (context && context == current_class_type && !SCOPED_ENUM_P (enumtype))
11629 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
11630 on the TYPE_FIELDS list for `S'. (That's so that you can say
11631 things like `S::i' later.) */
11632 finish_member_declaration (decl);
11636 /* Add this enumeration constant to the list for this type. */
11637 TYPE_VALUES (enumtype) = tree_cons (name, decl, TYPE_VALUES (enumtype));
11640 /* Look for an enumerator with the given NAME within the enumeration
11641 type ENUMTYPE. This routine is used primarily for qualified name
11642 lookup into an enumerator in C++0x, e.g.,
11644 enum class Color { Red, Green, Blue };
11646 Color color = Color::Red;
11648 Returns the value corresponding to the enumerator, or
11649 NULL_TREE if no such enumerator was found. */
11651 lookup_enumerator (tree enumtype, tree name)
11654 gcc_assert (enumtype && TREE_CODE (enumtype) == ENUMERAL_TYPE);
11656 e = purpose_member (name, TYPE_VALUES (enumtype));
11657 return e? TREE_VALUE (e) : NULL_TREE;
11661 /* We're defining DECL. Make sure that its type is OK. */
11664 check_function_type (tree decl, tree current_function_parms)
11666 tree fntype = TREE_TYPE (decl);
11667 tree return_type = complete_type (TREE_TYPE (fntype));
11669 /* In a function definition, arg types must be complete. */
11670 require_complete_types_for_parms (current_function_parms);
11672 /* constexpr functions must have literal argument types and
11673 literal return type. */
11674 validate_constexpr_fundecl (decl);
11676 if (dependent_type_p (return_type))
11678 if (!COMPLETE_OR_VOID_TYPE_P (return_type)
11679 || (TYPE_FOR_JAVA (return_type) && MAYBE_CLASS_TYPE_P (return_type)))
11681 tree args = TYPE_ARG_TYPES (fntype);
11683 if (!COMPLETE_OR_VOID_TYPE_P (return_type))
11684 error ("return type %q#T is incomplete", return_type);
11686 error ("return type has Java class type %q#T", return_type);
11688 /* Make it return void instead. */
11689 if (TREE_CODE (fntype) == METHOD_TYPE)
11690 fntype = build_method_type_directly (TREE_TYPE (TREE_VALUE (args)),
11692 TREE_CHAIN (args));
11694 fntype = build_function_type (void_type_node, args);
11696 = build_exception_variant (fntype,
11697 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (decl)));
11698 fntype = (cp_build_type_attribute_variant
11699 (fntype, TYPE_ATTRIBUTES (TREE_TYPE (decl))));
11700 TREE_TYPE (decl) = fntype;
11703 abstract_virtuals_error (decl, TREE_TYPE (fntype));
11706 /* Create the FUNCTION_DECL for a function definition.
11707 DECLSPECS and DECLARATOR are the parts of the declaration;
11708 they describe the function's name and the type it returns,
11709 but twisted together in a fashion that parallels the syntax of C.
11711 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
11712 DECLARATOR is really the DECL for the function we are about to
11713 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
11714 indicating that the function is an inline defined in-class.
11716 This function creates a binding context for the function body
11717 as well as setting up the FUNCTION_DECL in current_function_decl.
11719 For C++, we must first check whether that datum makes any sense.
11720 For example, "class A local_a(1,2);" means that variable local_a
11721 is an aggregate of type A, which should have a constructor
11722 applied to it with the argument list [1, 2].
11724 On entry, DECL_INITIAL (decl1) should be NULL_TREE or error_mark_node,
11725 or may be a BLOCK if the function has been defined previously
11726 in this translation unit. On exit, DECL_INITIAL (decl1) will be
11727 error_mark_node if the function has never been defined, or
11728 a BLOCK if the function has been defined somewhere. */
11731 start_preparsed_function (tree decl1, tree attrs, int flags)
11733 tree ctype = NULL_TREE;
11736 int doing_friend = 0;
11737 struct cp_binding_level *bl;
11738 tree current_function_parms;
11739 struct c_fileinfo *finfo
11740 = get_fileinfo (LOCATION_FILE (DECL_SOURCE_LOCATION (decl1)));
11741 bool honor_interface;
11743 /* Sanity check. */
11744 gcc_assert (TREE_CODE (TREE_VALUE (void_list_node)) == VOID_TYPE);
11745 gcc_assert (TREE_CHAIN (void_list_node) == NULL_TREE);
11747 fntype = TREE_TYPE (decl1);
11748 if (TREE_CODE (fntype) == METHOD_TYPE)
11749 ctype = TYPE_METHOD_BASETYPE (fntype);
11751 /* ISO C++ 11.4/5. A friend function defined in a class is in
11752 the (lexical) scope of the class in which it is defined. */
11753 if (!ctype && DECL_FRIEND_P (decl1))
11755 ctype = DECL_FRIEND_CONTEXT (decl1);
11757 /* CTYPE could be null here if we're dealing with a template;
11758 for example, `inline friend float foo()' inside a template
11759 will have no CTYPE set. */
11760 if (ctype && TREE_CODE (ctype) != RECORD_TYPE)
11766 if (DECL_DECLARED_INLINE_P (decl1)
11767 && lookup_attribute ("noinline", attrs))
11768 warning (0, "inline function %q+D given attribute noinline", decl1);
11770 /* Handle gnu_inline attribute. */
11771 if (GNU_INLINE_P (decl1))
11773 DECL_EXTERNAL (decl1) = 1;
11774 DECL_NOT_REALLY_EXTERN (decl1) = 0;
11775 DECL_INTERFACE_KNOWN (decl1) = 1;
11776 DECL_DISREGARD_INLINE_LIMITS (decl1) = 1;
11779 if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1))
11780 /* This is a constructor, we must ensure that any default args
11781 introduced by this definition are propagated to the clones
11782 now. The clones are used directly in overload resolution. */
11783 adjust_clone_args (decl1);
11785 /* Sometimes we don't notice that a function is a static member, and
11786 build a METHOD_TYPE for it. Fix that up now. */
11787 if (ctype != NULL_TREE && DECL_STATIC_FUNCTION_P (decl1)
11788 && TREE_CODE (TREE_TYPE (decl1)) == METHOD_TYPE)
11790 revert_static_member_fn (decl1);
11794 /* Set up current_class_type, and enter the scope of the class, if
11797 push_nested_class (ctype);
11798 else if (DECL_STATIC_FUNCTION_P (decl1))
11799 push_nested_class (DECL_CONTEXT (decl1));
11801 /* Now that we have entered the scope of the class, we must restore
11802 the bindings for any template parameters surrounding DECL1, if it
11803 is an inline member template. (Order is important; consider the
11804 case where a template parameter has the same name as a field of
11805 the class.) It is not until after this point that
11806 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
11807 if (flags & SF_INCLASS_INLINE)
11808 maybe_begin_member_template_processing (decl1);
11810 /* Effective C++ rule 15. */
11812 && DECL_OVERLOADED_OPERATOR_P (decl1) == NOP_EXPR
11813 && TREE_CODE (TREE_TYPE (fntype)) == VOID_TYPE)
11814 warning (OPT_Weffc__, "%<operator=%> should return a reference to %<*this%>");
11816 /* Make the init_value nonzero so pushdecl knows this is not tentative.
11817 error_mark_node is replaced below (in poplevel) with the BLOCK. */
11818 if (!DECL_INITIAL (decl1))
11819 DECL_INITIAL (decl1) = error_mark_node;
11821 /* This function exists in static storage.
11822 (This does not mean `static' in the C sense!) */
11823 TREE_STATIC (decl1) = 1;
11825 /* We must call push_template_decl after current_class_type is set
11826 up. (If we are processing inline definitions after exiting a
11827 class scope, current_class_type will be NULL_TREE until set above
11828 by push_nested_class.) */
11829 if (processing_template_decl)
11831 /* FIXME: Handle error_mark_node more gracefully. */
11832 tree newdecl1 = push_template_decl (decl1);
11833 if (newdecl1 != error_mark_node)
11837 /* We are now in the scope of the function being defined. */
11838 current_function_decl = decl1;
11840 /* Save the parm names or decls from this function's declarator
11841 where store_parm_decls will find them. */
11842 current_function_parms = DECL_ARGUMENTS (decl1);
11844 /* Make sure the parameter and return types are reasonable. When
11845 you declare a function, these types can be incomplete, but they
11846 must be complete when you define the function. */
11847 check_function_type (decl1, current_function_parms);
11849 /* Build the return declaration for the function. */
11850 restype = TREE_TYPE (fntype);
11851 if (DECL_RESULT (decl1) == NULL_TREE)
11855 resdecl = build_decl (input_location, RESULT_DECL, 0, restype);
11856 DECL_ARTIFICIAL (resdecl) = 1;
11857 DECL_IGNORED_P (resdecl) = 1;
11858 DECL_RESULT (decl1) = resdecl;
11860 cp_apply_type_quals_to_decl (cp_type_quals (restype), resdecl);
11863 /* Let the user know we're compiling this function. */
11864 announce_function (decl1);
11866 /* Record the decl so that the function name is defined.
11867 If we already have a decl for this name, and it is a FUNCTION_DECL,
11868 use the old decl. */
11869 if (!processing_template_decl && !(flags & SF_PRE_PARSED))
11871 /* A specialization is not used to guide overload resolution. */
11872 if (!DECL_FUNCTION_MEMBER_P (decl1)
11873 && !(DECL_USE_TEMPLATE (decl1) &&
11874 PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl1))))
11876 tree olddecl = pushdecl (decl1);
11878 if (olddecl == error_mark_node)
11879 /* If something went wrong when registering the declaration,
11880 use DECL1; we have to have a FUNCTION_DECL to use when
11881 parsing the body of the function. */
11885 /* Otherwise, OLDDECL is either a previous declaration
11886 of the same function or DECL1 itself. */
11888 if (warn_missing_declarations
11889 && olddecl == decl1
11890 && !DECL_MAIN_P (decl1)
11891 && TREE_PUBLIC (decl1)
11892 && !DECL_DECLARED_INLINE_P (decl1))
11896 /* Check whether DECL1 is in an anonymous
11898 for (context = DECL_CONTEXT (decl1);
11900 context = DECL_CONTEXT (context))
11902 if (TREE_CODE (context) == NAMESPACE_DECL
11903 && DECL_NAME (context) == NULL_TREE)
11907 if (context == NULL)
11908 warning (OPT_Wmissing_declarations,
11909 "no previous declaration for %q+D", decl1);
11917 /* We need to set the DECL_CONTEXT. */
11918 if (!DECL_CONTEXT (decl1) && DECL_TEMPLATE_INFO (decl1))
11919 DECL_CONTEXT (decl1) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1));
11921 fntype = TREE_TYPE (decl1);
11923 /* If #pragma weak applies, mark the decl appropriately now.
11924 The pragma only applies to global functions. Because
11925 determining whether or not the #pragma applies involves
11926 computing the mangled name for the declaration, we cannot
11927 apply the pragma until after we have merged this declaration
11928 with any previous declarations; if the original declaration
11929 has a linkage specification, that specification applies to
11930 the definition as well, and may affect the mangled name. */
11931 if (!DECL_CONTEXT (decl1))
11932 maybe_apply_pragma_weak (decl1);
11935 /* Reset this in case the call to pushdecl changed it. */
11936 current_function_decl = decl1;
11938 gcc_assert (DECL_INITIAL (decl1));
11940 /* This function may already have been parsed, in which case just
11941 return; our caller will skip over the body without parsing. */
11942 if (DECL_INITIAL (decl1) != error_mark_node)
11945 /* Initialize RTL machinery. We cannot do this until
11946 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
11947 even when processing a template; this is how we get
11948 CFUN set up, and our per-function variables initialized.
11949 FIXME factor out the non-RTL stuff. */
11950 bl = current_binding_level;
11951 allocate_struct_function (decl1, processing_template_decl);
11953 /* Initialize the language data structures. Whenever we start
11954 a new function, we destroy temporaries in the usual way. */
11955 cfun->language = GGC_CNEW (struct language_function);
11956 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
11957 current_binding_level = bl;
11959 /* Even though we're inside a function body, we still don't want to
11960 call expand_expr to calculate the size of a variable-sized array.
11961 We haven't necessarily assigned RTL to all variables yet, so it's
11962 not safe to try to expand expressions involving them. */
11963 cfun->dont_save_pending_sizes_p = 1;
11965 /* Start the statement-tree, start the tree now. */
11966 DECL_SAVED_TREE (decl1) = push_stmt_list ();
11968 /* If we are (erroneously) defining a function that we have already
11969 defined before, wipe out what we knew before. */
11970 if (!DECL_PENDING_INLINE_P (decl1))
11971 DECL_SAVED_FUNCTION_DATA (decl1) = NULL;
11973 if (ctype && !doing_friend && !DECL_STATIC_FUNCTION_P (decl1))
11975 /* We know that this was set up by `grokclassfn'. We do not
11976 wait until `store_parm_decls', since evil parse errors may
11977 never get us to that point. Here we keep the consistency
11978 between `current_class_type' and `current_class_ptr'. */
11979 tree t = DECL_ARGUMENTS (decl1);
11981 gcc_assert (t != NULL_TREE && TREE_CODE (t) == PARM_DECL);
11982 gcc_assert (TREE_CODE (TREE_TYPE (t)) == POINTER_TYPE);
11984 cp_function_chain->x_current_class_ref
11985 = cp_build_indirect_ref (t, RO_NULL, tf_warning_or_error);
11986 cp_function_chain->x_current_class_ptr = t;
11988 /* Constructors and destructors need to know whether they're "in
11989 charge" of initializing virtual base classes. */
11990 t = TREE_CHAIN (t);
11991 if (DECL_HAS_IN_CHARGE_PARM_P (decl1))
11993 current_in_charge_parm = t;
11994 t = TREE_CHAIN (t);
11996 if (DECL_HAS_VTT_PARM_P (decl1))
11998 gcc_assert (DECL_NAME (t) == vtt_parm_identifier);
11999 current_vtt_parm = t;
12003 honor_interface = (!DECL_TEMPLATE_INSTANTIATION (decl1)
12004 /* Implicitly-defined methods (like the
12005 destructor for a class in which no destructor
12006 is explicitly declared) must not be defined
12007 until their definition is needed. So, we
12008 ignore interface specifications for
12009 compiler-generated functions. */
12010 && !DECL_ARTIFICIAL (decl1));
12012 if (DECL_INTERFACE_KNOWN (decl1))
12014 tree ctx = decl_function_context (decl1);
12016 if (DECL_NOT_REALLY_EXTERN (decl1))
12017 DECL_EXTERNAL (decl1) = 0;
12019 if (ctx != NULL_TREE && DECL_DECLARED_INLINE_P (ctx)
12020 && TREE_PUBLIC (ctx))
12021 /* This is a function in a local class in an extern inline
12023 comdat_linkage (decl1);
12025 /* If this function belongs to an interface, it is public.
12026 If it belongs to someone else's interface, it is also external.
12027 This only affects inlines and template instantiations. */
12028 else if (!finfo->interface_unknown && honor_interface)
12030 if (DECL_DECLARED_INLINE_P (decl1)
12031 || DECL_TEMPLATE_INSTANTIATION (decl1)
12032 || processing_template_decl)
12034 DECL_EXTERNAL (decl1)
12035 = (finfo->interface_only
12036 || (DECL_DECLARED_INLINE_P (decl1)
12037 && ! flag_implement_inlines
12038 && !DECL_VINDEX (decl1)));
12040 /* For WIN32 we also want to put these in linkonce sections. */
12041 maybe_make_one_only (decl1);
12044 DECL_EXTERNAL (decl1) = 0;
12045 DECL_INTERFACE_KNOWN (decl1) = 1;
12046 /* If this function is in an interface implemented in this file,
12047 make sure that the back end knows to emit this function
12049 if (!DECL_EXTERNAL (decl1))
12050 mark_needed (decl1);
12052 else if (finfo->interface_unknown && finfo->interface_only
12053 && honor_interface)
12055 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
12056 interface, we will have both finfo->interface_unknown and
12057 finfo->interface_only set. In that case, we don't want to
12058 use the normal heuristics because someone will supply a
12059 #pragma implementation elsewhere, and deducing it here would
12060 produce a conflict. */
12061 comdat_linkage (decl1);
12062 DECL_EXTERNAL (decl1) = 0;
12063 DECL_INTERFACE_KNOWN (decl1) = 1;
12064 DECL_DEFER_OUTPUT (decl1) = 1;
12068 /* This is a definition, not a reference.
12069 So clear DECL_EXTERNAL, unless this is a GNU extern inline. */
12070 if (!GNU_INLINE_P (decl1))
12071 DECL_EXTERNAL (decl1) = 0;
12073 if ((DECL_DECLARED_INLINE_P (decl1)
12074 || DECL_TEMPLATE_INSTANTIATION (decl1))
12075 && ! DECL_INTERFACE_KNOWN (decl1))
12076 DECL_DEFER_OUTPUT (decl1) = 1;
12078 DECL_INTERFACE_KNOWN (decl1) = 1;
12081 /* Determine the ELF visibility attribute for the function. We must not
12082 do this before calling "pushdecl", as we must allow "duplicate_decls"
12083 to merge any attributes appropriately. We also need to wait until
12085 if (!DECL_CLONED_FUNCTION_P (decl1))
12086 determine_visibility (decl1);
12088 begin_scope (sk_function_parms, decl1);
12092 if (DECL_DESTRUCTOR_P (decl1)
12093 || (DECL_CONSTRUCTOR_P (decl1)
12094 && targetm.cxx.cdtor_returns_this ()))
12096 cdtor_label = build_decl (input_location,
12097 LABEL_DECL, NULL_TREE, NULL_TREE);
12098 DECL_CONTEXT (cdtor_label) = current_function_decl;
12101 start_fname_decls ();
12103 store_parm_decls (current_function_parms);
12107 /* Like start_preparsed_function, except that instead of a
12108 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
12110 Returns 1 on success. If the DECLARATOR is not suitable for a function
12111 (it defines a datum instead), we return 0, which tells
12112 yyparse to report a parse error. */
12115 start_function (cp_decl_specifier_seq *declspecs,
12116 const cp_declarator *declarator,
12121 decl1 = grokdeclarator (declarator, declspecs, FUNCDEF, 1, &attrs);
12122 if (decl1 == error_mark_node)
12124 /* If the declarator is not suitable for a function definition,
12125 cause a syntax error. */
12126 if (decl1 == NULL_TREE || TREE_CODE (decl1) != FUNCTION_DECL)
12128 error ("invalid function declaration");
12132 if (DECL_MAIN_P (decl1))
12133 /* main must return int. grokfndecl should have corrected it
12134 (and issued a diagnostic) if the user got it wrong. */
12135 gcc_assert (same_type_p (TREE_TYPE (TREE_TYPE (decl1)),
12136 integer_type_node));
12138 start_preparsed_function (decl1, attrs, /*flags=*/SF_DEFAULT);
12143 /* Returns true iff an EH_SPEC_BLOCK should be created in the body of
12147 use_eh_spec_block (tree fn)
12149 return (flag_exceptions && flag_enforce_eh_specs
12150 && !processing_template_decl
12151 && TYPE_RAISES_EXCEPTIONS (TREE_TYPE (fn))
12152 /* We insert the EH_SPEC_BLOCK only in the original
12153 function; then, it is copied automatically to the
12155 && !DECL_CLONED_FUNCTION_P (fn)
12156 /* Implicitly-generated constructors and destructors have
12157 exception specifications. However, those specifications
12158 are the union of the possible exceptions specified by the
12159 constructors/destructors for bases and members, so no
12160 unallowed exception will ever reach this function. By
12161 not creating the EH_SPEC_BLOCK we save a little memory,
12162 and we avoid spurious warnings about unreachable
12164 && !DECL_ARTIFICIAL (fn));
12167 /* Store the parameter declarations into the current function declaration.
12168 This is called after parsing the parameter declarations, before
12169 digesting the body of the function.
12171 Also install to binding contour return value identifier, if any. */
12174 store_parm_decls (tree current_function_parms)
12176 tree fndecl = current_function_decl;
12179 /* This is a chain of any other decls that came in among the parm
12180 declarations. If a parm is declared with enum {foo, bar} x;
12181 then CONST_DECLs for foo and bar are put here. */
12182 tree nonparms = NULL_TREE;
12184 if (current_function_parms)
12186 /* This case is when the function was defined with an ANSI prototype.
12187 The parms already have decls, so we need not do anything here
12188 except record them as in effect
12189 and complain if any redundant old-style parm decls were written. */
12191 tree specparms = current_function_parms;
12194 /* Must clear this because it might contain TYPE_DECLs declared
12196 current_binding_level->names = NULL;
12198 /* If we're doing semantic analysis, then we'll call pushdecl
12199 for each of these. We must do them in reverse order so that
12200 they end in the correct forward order. */
12201 specparms = nreverse (specparms);
12203 for (parm = specparms; parm; parm = next)
12205 next = TREE_CHAIN (parm);
12206 if (TREE_CODE (parm) == PARM_DECL)
12208 if (DECL_NAME (parm) == NULL_TREE
12209 || TREE_CODE (parm) != VOID_TYPE)
12212 error ("parameter %qD declared void", parm);
12216 /* If we find an enum constant or a type tag,
12217 put it aside for the moment. */
12218 TREE_CHAIN (parm) = NULL_TREE;
12219 nonparms = chainon (nonparms, parm);
12223 /* Get the decls in their original chain order and record in the
12224 function. This is all and only the PARM_DECLs that were
12225 pushed into scope by the loop above. */
12226 DECL_ARGUMENTS (fndecl) = getdecls ();
12229 DECL_ARGUMENTS (fndecl) = NULL_TREE;
12231 /* Now store the final chain of decls for the arguments
12232 as the decl-chain of the current lexical scope.
12233 Put the enumerators in as well, at the front so that
12234 DECL_ARGUMENTS is not modified. */
12235 current_binding_level->names = chainon (nonparms, DECL_ARGUMENTS (fndecl));
12237 if (use_eh_spec_block (current_function_decl))
12238 current_eh_spec_block = begin_eh_spec_block ();
12242 /* We have finished doing semantic analysis on DECL, but have not yet
12243 generated RTL for its body. Save away our current state, so that
12244 when we want to generate RTL later we know what to do. */
12247 save_function_data (tree decl)
12249 struct language_function *f;
12251 /* Save the language-specific per-function data so that we can
12252 get it back when we really expand this function. */
12253 gcc_assert (!DECL_PENDING_INLINE_P (decl));
12256 f = GGC_NEW (struct language_function);
12257 memcpy (f, cp_function_chain, sizeof (struct language_function));
12258 DECL_SAVED_FUNCTION_DATA (decl) = f;
12260 /* Clear out the bits we don't need. */
12261 f->base.x_stmt_tree.x_cur_stmt_list = NULL_TREE;
12262 f->bindings = NULL;
12263 f->x_local_names = NULL;
12267 /* Set the return value of the constructor (if present). */
12270 finish_constructor_body (void)
12275 if (targetm.cxx.cdtor_returns_this ()
12276 && (! TYPE_FOR_JAVA (current_class_type)))
12278 /* Any return from a constructor will end up here. */
12279 add_stmt (build_stmt (input_location, LABEL_EXPR, cdtor_label));
12281 val = DECL_ARGUMENTS (current_function_decl);
12282 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
12283 DECL_RESULT (current_function_decl), val);
12284 /* Return the address of the object. */
12285 exprstmt = build_stmt (input_location, RETURN_EXPR, val);
12286 add_stmt (exprstmt);
12290 /* Do all the processing for the beginning of a destructor; set up the
12291 vtable pointers and cleanups for bases and members. */
12294 begin_destructor_body (void)
12296 tree compound_stmt;
12298 /* If the CURRENT_CLASS_TYPE is incomplete, we will have already
12299 issued an error message. We still want to try to process the
12300 body of the function, but initialize_vtbl_ptrs will crash if
12301 TYPE_BINFO is NULL. */
12302 if (COMPLETE_TYPE_P (current_class_type))
12304 compound_stmt = begin_compound_stmt (0);
12305 /* Make all virtual function table pointers in non-virtual base
12306 classes point to CURRENT_CLASS_TYPE's virtual function
12308 initialize_vtbl_ptrs (current_class_ptr);
12309 finish_compound_stmt (compound_stmt);
12311 /* And insert cleanups for our bases and members so that they
12312 will be properly destroyed if we throw. */
12313 push_base_cleanups ();
12317 /* At the end of every destructor we generate code to delete the object if
12318 necessary. Do that now. */
12321 finish_destructor_body (void)
12325 /* Any return from a destructor will end up here; that way all base
12326 and member cleanups will be run when the function returns. */
12327 add_stmt (build_stmt (input_location, LABEL_EXPR, cdtor_label));
12329 /* In a virtual destructor, we must call delete. */
12330 if (DECL_VIRTUAL_P (current_function_decl))
12333 tree virtual_size = cxx_sizeof (current_class_type);
12337 At the point of definition of a virtual destructor (including
12338 an implicit definition), non-placement operator delete shall
12339 be looked up in the scope of the destructor's class and if
12340 found shall be accessible and unambiguous. */
12341 exprstmt = build_op_delete_call(DELETE_EXPR, current_class_ptr,
12343 /*global_p=*/false,
12344 /*placement=*/NULL_TREE,
12345 /*alloc_fn=*/NULL_TREE);
12347 if_stmt = begin_if_stmt ();
12348 finish_if_stmt_cond (build2 (BIT_AND_EXPR, integer_type_node,
12349 current_in_charge_parm,
12352 finish_expr_stmt (exprstmt);
12353 finish_then_clause (if_stmt);
12354 finish_if_stmt (if_stmt);
12357 if (targetm.cxx.cdtor_returns_this ())
12361 val = DECL_ARGUMENTS (current_function_decl);
12362 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
12363 DECL_RESULT (current_function_decl), val);
12364 /* Return the address of the object. */
12365 exprstmt = build_stmt (input_location, RETURN_EXPR, val);
12366 add_stmt (exprstmt);
12370 /* Do the necessary processing for the beginning of a function body, which
12371 in this case includes member-initializers, but not the catch clauses of
12372 a function-try-block. Currently, this means opening a binding level
12373 for the member-initializers (in a ctor) and member cleanups (in a dtor). */
12376 begin_function_body (void)
12380 if (! FUNCTION_NEEDS_BODY_BLOCK (current_function_decl))
12383 if (processing_template_decl)
12384 /* Do nothing now. */;
12386 /* Always keep the BLOCK node associated with the outermost pair of
12387 curly braces of a function. These are needed for correct
12388 operation of dwarfout.c. */
12389 keep_next_level (true);
12391 stmt = begin_compound_stmt (BCS_FN_BODY);
12393 if (processing_template_decl)
12394 /* Do nothing now. */;
12395 else if (DECL_DESTRUCTOR_P (current_function_decl))
12396 begin_destructor_body ();
12401 /* Do the processing for the end of a function body. Currently, this means
12402 closing out the cleanups for fully-constructed bases and members, and in
12403 the case of the destructor, deleting the object if desired. Again, this
12404 is only meaningful for [cd]tors, since they are the only functions where
12405 there is a significant distinction between the main body and any
12406 function catch clauses. Handling, say, main() return semantics here
12407 would be wrong, as flowing off the end of a function catch clause for
12408 main() would also need to return 0. */
12411 finish_function_body (tree compstmt)
12413 if (compstmt == NULL_TREE)
12416 /* Close the block. */
12417 finish_compound_stmt (compstmt);
12419 if (processing_template_decl)
12420 /* Do nothing now. */;
12421 else if (DECL_CONSTRUCTOR_P (current_function_decl))
12422 finish_constructor_body ();
12423 else if (DECL_DESTRUCTOR_P (current_function_decl))
12424 finish_destructor_body ();
12427 /* Given a function, returns the BLOCK corresponding to the outermost level
12428 of curly braces, skipping the artificial block created for constructor
12432 outer_curly_brace_block (tree fndecl)
12434 tree block = BLOCK_SUBBLOCKS (DECL_INITIAL (fndecl));
12435 if (FUNCTION_NEEDS_BODY_BLOCK (current_function_decl))
12436 /* Skip the artificial function body block. */
12437 block = BLOCK_SUBBLOCKS (block);
12441 /* Finish up a function declaration and compile that function
12442 all the way to assembler language output. The free the storage
12443 for the function definition.
12445 FLAGS is a bitwise or of the following values:
12447 We just finished processing the body of an in-class inline
12448 function definition. (This processing will have taken place
12449 after the class definition is complete.) */
12452 finish_function (int flags)
12454 tree fndecl = current_function_decl;
12455 tree fntype, ctype = NULL_TREE;
12456 int inclass_inline = (flags & 2) != 0;
12459 /* When we get some parse errors, we can end up without a
12460 current_function_decl, so cope. */
12461 if (fndecl == NULL_TREE)
12462 return error_mark_node;
12464 gcc_assert (!defer_mark_used_calls);
12465 defer_mark_used_calls = true;
12467 if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fndecl)
12468 && DECL_VIRTUAL_P (fndecl)
12469 && !processing_template_decl)
12471 tree fnclass = DECL_CONTEXT (fndecl);
12472 if (fndecl == CLASSTYPE_KEY_METHOD (fnclass))
12473 keyed_classes = tree_cons (NULL_TREE, fnclass, keyed_classes);
12476 nested = function_depth > 1;
12477 fntype = TREE_TYPE (fndecl);
12479 /* TREE_READONLY (fndecl) = 1;
12480 This caused &foo to be of type ptr-to-const-function
12481 which then got a warning when stored in a ptr-to-function variable. */
12483 gcc_assert (building_stmt_tree ());
12484 /* The current function is being defined, so its DECL_INITIAL should
12485 be set, and unless there's a multiple definition, it should be
12486 error_mark_node. */
12487 gcc_assert (DECL_INITIAL (fndecl) == error_mark_node);
12489 /* For a cloned function, we've already got all the code we need;
12490 there's no need to add any extra bits. */
12491 if (!DECL_CLONED_FUNCTION_P (fndecl))
12493 if (DECL_MAIN_P (current_function_decl))
12497 /* Make it so that `main' always returns 0 by default (or
12500 stmt = finish_return_stmt (integer_one_node);
12502 stmt = finish_return_stmt (integer_zero_node);
12504 /* Hack. We don't want the middle-end to warn that this
12505 return is unreachable, so put the statement on the
12508 location_t linezero = linemap_line_start (line_table, 0, 1);
12509 SET_EXPR_LOCATION (stmt, linezero);
12513 if (use_eh_spec_block (current_function_decl))
12514 finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
12515 (TREE_TYPE (current_function_decl)),
12516 current_eh_spec_block);
12519 /* If we're saving up tree structure, tie off the function now. */
12520 DECL_SAVED_TREE (fndecl) = pop_stmt_list (DECL_SAVED_TREE (fndecl));
12522 finish_fname_decls ();
12524 /* If this function can't throw any exceptions, remember that. */
12525 if (!processing_template_decl
12526 && !cp_function_chain->can_throw
12527 && !flag_non_call_exceptions
12528 && !DECL_REPLACEABLE_P (fndecl))
12529 TREE_NOTHROW (fndecl) = 1;
12531 /* This must come after expand_function_end because cleanups might
12532 have declarations (from inline functions) that need to go into
12533 this function's blocks. */
12535 /* If the current binding level isn't the outermost binding level
12536 for this function, either there is a bug, or we have experienced
12537 syntax errors and the statement tree is malformed. */
12538 if (current_binding_level->kind != sk_function_parms)
12540 /* Make sure we have already experienced errors. */
12541 gcc_assert (errorcount);
12543 /* Throw away the broken statement tree and extra binding
12545 DECL_SAVED_TREE (fndecl) = alloc_stmt_list ();
12547 while (current_binding_level->kind != sk_function_parms)
12549 if (current_binding_level->kind == sk_class)
12550 pop_nested_class ();
12552 poplevel (0, 0, 0);
12555 poplevel (1, 0, 1);
12557 /* Statements should always be full-expressions at the outermost set
12558 of curly braces for a function. */
12559 gcc_assert (stmts_are_full_exprs_p ());
12561 /* Set up the named return value optimization, if we can. Candidate
12562 variables are selected in check_return_expr. */
12563 if (current_function_return_value)
12565 tree r = current_function_return_value;
12568 if (r != error_mark_node
12569 /* This is only worth doing for fns that return in memory--and
12570 simpler, since we don't have to worry about promoted modes. */
12571 && aggregate_value_p (TREE_TYPE (TREE_TYPE (fndecl)), fndecl)
12572 /* Only allow this for variables declared in the outer scope of
12573 the function so we know that their lifetime always ends with a
12574 return; see g++.dg/opt/nrv6.C. We could be more flexible if
12575 we were to do this optimization in tree-ssa. */
12576 && (outer = outer_curly_brace_block (fndecl))
12577 && chain_member (r, BLOCK_VARS (outer)))
12578 finalize_nrv (&DECL_SAVED_TREE (fndecl), r, DECL_RESULT (fndecl));
12580 current_function_return_value = NULL_TREE;
12583 /* Remember that we were in class scope. */
12584 if (current_class_name)
12585 ctype = current_class_type;
12587 /* Must mark the RESULT_DECL as being in this function. */
12588 DECL_CONTEXT (DECL_RESULT (fndecl)) = fndecl;
12590 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
12591 to the FUNCTION_DECL node itself. */
12592 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl)) = fndecl;
12594 /* Save away current state, if appropriate. */
12595 if (!processing_template_decl)
12596 save_function_data (fndecl);
12598 /* Complain if there's just no return statement. */
12599 if (warn_return_type
12600 && TREE_CODE (TREE_TYPE (fntype)) != VOID_TYPE
12601 && !dependent_type_p (TREE_TYPE (fntype))
12602 && !current_function_returns_value && !current_function_returns_null
12603 /* Don't complain if we abort or throw. */
12604 && !current_function_returns_abnormally
12605 /* Don't complain if we are declared noreturn. */
12606 && !TREE_THIS_VOLATILE (fndecl)
12607 && !DECL_NAME (DECL_RESULT (fndecl))
12608 && !TREE_NO_WARNING (fndecl)
12609 /* Structor return values (if any) are set by the compiler. */
12610 && !DECL_CONSTRUCTOR_P (fndecl)
12611 && !DECL_DESTRUCTOR_P (fndecl))
12613 warning (OPT_Wreturn_type,
12614 "no return statement in function returning non-void");
12615 TREE_NO_WARNING (fndecl) = 1;
12618 /* Store the end of the function, so that we get good line number
12619 info for the epilogue. */
12620 cfun->function_end_locus = input_location;
12622 /* Complain about parameters that are only set, but never otherwise used. */
12623 if (warn_unused_but_set_parameter
12624 && !processing_template_decl
12625 && errorcount == unused_but_set_errorcount
12626 && !DECL_CLONED_FUNCTION_P (fndecl))
12630 for (decl = DECL_ARGUMENTS (fndecl);
12632 decl = TREE_CHAIN (decl))
12633 if (TREE_USED (decl)
12634 && TREE_CODE (decl) == PARM_DECL
12635 && !DECL_READ_P (decl)
12636 && DECL_NAME (decl)
12637 && !DECL_ARTIFICIAL (decl)
12638 && !TREE_NO_WARNING (decl)
12639 && !DECL_IN_SYSTEM_HEADER (decl)
12640 && TREE_TYPE (decl) != error_mark_node
12641 && TREE_CODE (TREE_TYPE (decl)) != REFERENCE_TYPE
12642 && (!CLASS_TYPE_P (TREE_TYPE (decl))
12643 || !TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl))))
12644 warning (OPT_Wunused_but_set_parameter,
12645 "parameter %q+D set but not used", decl);
12646 unused_but_set_errorcount = errorcount;
12649 /* Genericize before inlining. */
12650 if (!processing_template_decl)
12652 struct language_function *f = DECL_SAVED_FUNCTION_DATA (fndecl);
12653 invoke_plugin_callbacks (PLUGIN_PRE_GENERICIZE, fndecl);
12654 cp_genericize (fndecl);
12655 /* Clear out the bits we don't need. */
12656 f->x_current_class_ptr = NULL;
12657 f->x_current_class_ref = NULL;
12658 f->x_eh_spec_block = NULL;
12659 f->x_in_charge_parm = NULL;
12660 f->x_vtt_parm = NULL;
12661 f->x_return_value = NULL;
12662 f->bindings = NULL;
12663 f->extern_decl_map = NULL;
12665 /* Clear out the bits we don't need. */
12666 local_names = NULL;
12668 /* We're leaving the context of this function, so zap cfun. It's still in
12669 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
12671 current_function_decl = NULL;
12673 /* If this is an in-class inline definition, we may have to pop the
12674 bindings for the template parameters that we added in
12675 maybe_begin_member_template_processing when start_function was
12677 if (inclass_inline)
12678 maybe_end_member_template_processing ();
12680 /* Leave the scope of the class. */
12682 pop_nested_class ();
12688 /* Let the error reporting routines know that we're outside a
12689 function. For a nested function, this value is used in
12690 cxx_pop_function_context and then reset via pop_function_context. */
12691 current_function_decl = NULL_TREE;
12693 defer_mark_used_calls = false;
12694 if (deferred_mark_used_calls)
12699 for (i = 0; VEC_iterate (tree, deferred_mark_used_calls, i, decl); i++)
12701 VEC_free (tree, gc, deferred_mark_used_calls);
12707 /* Create the FUNCTION_DECL for a function definition.
12708 DECLSPECS and DECLARATOR are the parts of the declaration;
12709 they describe the return type and the name of the function,
12710 but twisted together in a fashion that parallels the syntax of C.
12712 This function creates a binding context for the function body
12713 as well as setting up the FUNCTION_DECL in current_function_decl.
12715 Returns a FUNCTION_DECL on success.
12717 If the DECLARATOR is not suitable for a function (it defines a datum
12718 instead), we return 0, which tells yyparse to report a parse error.
12720 May return void_type_node indicating that this method is actually
12721 a friend. See grokfield for more details.
12723 Came here with a `.pushlevel' .
12725 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
12726 CHANGES TO CODE IN `grokfield'. */
12729 grokmethod (cp_decl_specifier_seq *declspecs,
12730 const cp_declarator *declarator, tree attrlist)
12732 tree fndecl = grokdeclarator (declarator, declspecs, MEMFUNCDEF, 0,
12735 if (fndecl == error_mark_node)
12736 return error_mark_node;
12738 if (fndecl == NULL || TREE_CODE (fndecl) != FUNCTION_DECL)
12740 error ("invalid member function declaration");
12741 return error_mark_node;
12745 cplus_decl_attributes (&fndecl, attrlist, 0);
12747 /* Pass friends other than inline friend functions back. */
12748 if (fndecl == void_type_node)
12751 if (DECL_IN_AGGR_P (fndecl))
12753 if (DECL_CONTEXT (fndecl)
12754 && TREE_CODE (DECL_CONTEXT (fndecl)) != NAMESPACE_DECL)
12755 error ("%qD is already defined in class %qT", fndecl,
12756 DECL_CONTEXT (fndecl));
12757 return error_mark_node;
12760 check_template_shadow (fndecl);
12762 DECL_DECLARED_INLINE_P (fndecl) = 1;
12763 DECL_NO_INLINE_WARNING_P (fndecl) = 1;
12765 /* We process method specializations in finish_struct_1. */
12766 if (processing_template_decl && !DECL_TEMPLATE_SPECIALIZATION (fndecl))
12768 fndecl = push_template_decl (fndecl);
12769 if (fndecl == error_mark_node)
12773 if (! DECL_FRIEND_P (fndecl))
12775 if (TREE_CHAIN (fndecl))
12777 fndecl = copy_node (fndecl);
12778 TREE_CHAIN (fndecl) = NULL_TREE;
12782 cp_finish_decl (fndecl, NULL_TREE, false, NULL_TREE, 0);
12784 DECL_IN_AGGR_P (fndecl) = 1;
12789 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
12790 we can lay it out later, when and if its type becomes complete. */
12793 maybe_register_incomplete_var (tree var)
12795 gcc_assert (TREE_CODE (var) == VAR_DECL);
12797 /* Keep track of variables with incomplete types. */
12798 if (!processing_template_decl && TREE_TYPE (var) != error_mark_node
12799 && DECL_EXTERNAL (var))
12801 tree inner_type = TREE_TYPE (var);
12803 while (TREE_CODE (inner_type) == ARRAY_TYPE)
12804 inner_type = TREE_TYPE (inner_type);
12805 inner_type = TYPE_MAIN_VARIANT (inner_type);
12807 if ((!COMPLETE_TYPE_P (inner_type) && CLASS_TYPE_P (inner_type))
12808 /* RTTI TD entries are created while defining the type_info. */
12809 || (TYPE_LANG_SPECIFIC (inner_type)
12810 && TYPE_BEING_DEFINED (inner_type)))
12811 incomplete_vars = tree_cons (inner_type, var, incomplete_vars);
12815 /* Called when a class type (given by TYPE) is defined. If there are
12816 any existing VAR_DECLs whose type has been completed by this
12817 declaration, update them now. */
12820 complete_vars (tree type)
12822 tree *list = &incomplete_vars;
12824 gcc_assert (CLASS_TYPE_P (type));
12827 if (same_type_p (type, TREE_PURPOSE (*list)))
12829 tree var = TREE_VALUE (*list);
12830 tree type = TREE_TYPE (var);
12831 /* Complete the type of the variable. The VAR_DECL itself
12832 will be laid out in expand_expr. */
12833 complete_type (type);
12834 cp_apply_type_quals_to_decl (cp_type_quals (type), var);
12835 /* Remove this entry from the list. */
12836 *list = TREE_CHAIN (*list);
12839 list = &TREE_CHAIN (*list);
12842 /* Check for pending declarations which may have abstract type. */
12843 complete_type_check_abstract (type);
12846 /* If DECL is of a type which needs a cleanup, build and return an
12847 expression to perform that cleanup here. Return NULL_TREE if no
12848 cleanup need be done. */
12851 cxx_maybe_build_cleanup (tree decl)
12857 /* Assume no cleanup is required. */
12858 cleanup = NULL_TREE;
12860 if (error_operand_p (decl))
12863 /* Handle "__attribute__((cleanup))". We run the cleanup function
12864 before the destructor since the destructor is what actually
12865 terminates the lifetime of the object. */
12866 attr = lookup_attribute ("cleanup", DECL_ATTRIBUTES (decl));
12873 /* Get the name specified by the user for the cleanup function. */
12874 id = TREE_VALUE (TREE_VALUE (attr));
12875 /* Look up the name to find the cleanup function to call. It is
12876 important to use lookup_name here because that is what is
12877 used in c-common.c:handle_cleanup_attribute when performing
12878 initial checks on the attribute. Note that those checks
12879 include ensuring that the function found is not an overloaded
12880 function, or an object with an overloaded call operator,
12881 etc.; we can rely on the fact that the function found is an
12882 ordinary FUNCTION_DECL. */
12883 fn = lookup_name (id);
12884 arg = build_address (decl);
12886 cleanup = cp_build_function_call (fn, build_tree_list (NULL_TREE,
12888 tf_warning_or_error);
12890 /* Handle ordinary C++ destructors. */
12891 type = TREE_TYPE (decl);
12892 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
12894 int flags = LOOKUP_NORMAL|LOOKUP_DESTRUCTOR;
12895 bool has_vbases = (TREE_CODE (type) == RECORD_TYPE
12896 && CLASSTYPE_VBASECLASSES (type));
12900 if (TREE_CODE (type) == ARRAY_TYPE)
12903 addr = build_address (decl);
12905 /* Optimize for space over speed here. */
12906 if (!has_vbases || flag_expensive_optimizations)
12907 flags |= LOOKUP_NONVIRTUAL;
12909 call = build_delete (TREE_TYPE (addr), addr,
12910 sfk_complete_destructor, flags, 0);
12912 cleanup = build_compound_expr (input_location, cleanup, call);
12920 /* When a stmt has been parsed, this function is called. */
12927 /* Return the FUNCTION_TYPE that corresponds to MEMFNTYPE, which can be a
12928 FUNCTION_DECL, METHOD_TYPE, FUNCTION_TYPE, pointer or reference to
12929 METHOD_TYPE or FUNCTION_TYPE, or pointer to member function. */
12932 static_fn_type (tree memfntype)
12937 if (TYPE_PTRMEMFUNC_P (memfntype))
12938 memfntype = TYPE_PTRMEMFUNC_FN_TYPE (memfntype);
12939 if (POINTER_TYPE_P (memfntype)
12940 || TREE_CODE (memfntype) == FUNCTION_DECL)
12941 memfntype = TREE_TYPE (memfntype);
12942 if (TREE_CODE (memfntype) == FUNCTION_TYPE)
12944 gcc_assert (TREE_CODE (memfntype) == METHOD_TYPE);
12945 args = TYPE_ARG_TYPES (memfntype);
12946 fntype = build_function_type (TREE_TYPE (memfntype), TREE_CHAIN (args));
12947 fntype = apply_memfn_quals (fntype, type_memfn_quals (memfntype));
12948 fntype = (cp_build_type_attribute_variant
12949 (fntype, TYPE_ATTRIBUTES (memfntype)));
12950 fntype = (build_exception_variant
12951 (fntype, TYPE_RAISES_EXCEPTIONS (memfntype)));
12955 /* DECL was originally constructed as a non-static member function,
12956 but turned out to be static. Update it accordingly. */
12959 revert_static_member_fn (tree decl)
12961 TREE_TYPE (decl) = static_fn_type (decl);
12963 if (cp_type_quals (TREE_TYPE (decl)) != TYPE_UNQUALIFIED)
12964 error ("static member function %q#D declared with type qualifiers", decl);
12966 if (DECL_ARGUMENTS (decl))
12967 DECL_ARGUMENTS (decl) = TREE_CHAIN (DECL_ARGUMENTS (decl));
12968 DECL_STATIC_FUNCTION_P (decl) = 1;
12971 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
12972 one of the language-independent trees. */
12974 enum cp_tree_node_structure_enum
12975 cp_tree_node_structure (union lang_tree_node * t)
12977 switch (TREE_CODE (&t->generic))
12979 case DEFAULT_ARG: return TS_CP_DEFAULT_ARG;
12980 case IDENTIFIER_NODE: return TS_CP_IDENTIFIER;
12981 case OVERLOAD: return TS_CP_OVERLOAD;
12982 case TEMPLATE_PARM_INDEX: return TS_CP_TPI;
12983 case PTRMEM_CST: return TS_CP_PTRMEM;
12984 case BASELINK: return TS_CP_BASELINK;
12985 case STATIC_ASSERT: return TS_CP_STATIC_ASSERT;
12986 case ARGUMENT_PACK_SELECT: return TS_CP_ARGUMENT_PACK_SELECT;
12987 case TRAIT_EXPR: return TS_CP_TRAIT_EXPR;
12988 case LAMBDA_EXPR: return TS_CP_LAMBDA_EXPR;
12989 case TEMPLATE_INFO: return TS_CP_TEMPLATE_INFO;
12990 default: return TS_CP_GENERIC;
12994 /* Build the void_list_node (void_type_node having been created). */
12996 build_void_list_node (void)
12998 tree t = build_tree_list (NULL_TREE, void_type_node);
13003 cp_missing_noreturn_ok_p (tree decl)
13005 /* A missing noreturn is ok for the `main' function. */
13006 return DECL_MAIN_P (decl);
13009 /* Return the COMDAT group into which DECL should be placed. */
13012 cxx_comdat_group (tree decl)
13016 /* Virtual tables, construction virtual tables, and virtual table
13017 tables all go in a single COMDAT group, named after the primary
13019 if (TREE_CODE (decl) == VAR_DECL && DECL_VTABLE_OR_VTT_P (decl))
13020 name = DECL_ASSEMBLER_NAME (CLASSTYPE_VTABLES (DECL_CONTEXT (decl)));
13021 /* For all other DECLs, the COMDAT group is the mangled name of the
13022 declaration itself. */
13025 while (DECL_THUNK_P (decl))
13027 /* If TARGET_USE_LOCAL_THUNK_ALIAS_P, use_thunk puts the thunk
13028 into the same section as the target function. In that case
13029 we must return target's name. */
13030 tree target = THUNK_TARGET (decl);
13031 if (TARGET_USE_LOCAL_THUNK_ALIAS_P (target)
13032 && DECL_SECTION_NAME (target) != NULL
13033 && DECL_ONE_ONLY (target))
13038 name = DECL_ASSEMBLER_NAME (decl);
13044 #include "gt-cp-decl.h"