1 /* Process declarations and variables for C++ compiler.
2 Copyright (C) 1988, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
3 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
4 Free Software Foundation, Inc.
5 Contributed by Michael Tiemann (tiemann@cygnus.com)
7 This file is part of GCC.
9 GCC is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3, or (at your option)
14 GCC is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with GCC; see the file COPYING3. If not see
21 <http://www.gnu.org/licenses/>. */
24 /* Process declarations and symbol lookup for C++ front end.
25 Also constructs types; the standard scalar types at initialization,
26 and structure, union, array and enum types when they are declared. */
28 /* ??? not all decl nodes are given the most useful possible
29 line numbers. For example, the CONST_DECLs for enum values. */
33 #include "coretypes.h"
40 #include "tree-iterator.h"
41 #include "tree-inline.h"
52 #include "diagnostic.h"
56 #include "tree-flow.h"
57 #include "pointer-set.h"
60 static tree grokparms (tree parmlist, tree *);
61 static const char *redeclaration_error_message (tree, tree);
63 static int decl_jump_unsafe (tree);
64 static void require_complete_types_for_parms (tree);
65 static int ambi_op_p (enum tree_code);
66 static int unary_op_p (enum tree_code);
67 static void push_local_name (tree);
68 static tree grok_reference_init (tree, tree, tree, tree *);
69 static tree grokvardecl (tree, tree, const cp_decl_specifier_seq *,
71 static void record_unknown_type (tree, const char *);
72 static tree builtin_function_1 (tree, tree, bool);
73 static tree build_library_fn_1 (tree, enum tree_code, tree);
74 static int member_function_or_else (tree, tree, enum overload_flags);
75 static void bad_specifiers (tree, const char *, int, int, int, int,
77 static void check_for_uninitialized_const_var (tree);
78 static hashval_t typename_hash (const void *);
79 static int typename_compare (const void *, const void *);
80 static tree local_variable_p_walkfn (tree *, int *, void *);
81 static tree record_builtin_java_type (const char *, int);
82 static const char *tag_name (enum tag_types);
83 static tree lookup_and_check_tag (enum tag_types, tree, tag_scope, bool);
84 static int walk_namespaces_r (tree, walk_namespaces_fn, void *);
85 static void maybe_deduce_size_from_array_init (tree, tree);
86 static void layout_var_decl (tree);
87 static tree check_initializer (tree, tree, int, tree *);
88 static void make_rtl_for_nonlocal_decl (tree, tree, const char *);
89 static void save_function_data (tree);
90 static void check_function_type (tree, tree);
91 static void finish_constructor_body (void);
92 static void begin_destructor_body (void);
93 static void finish_destructor_body (void);
94 static tree create_array_type_for_decl (tree, tree, tree);
95 static tree get_atexit_node (void);
96 static tree get_dso_handle_node (void);
97 static tree start_cleanup_fn (void);
98 static void end_cleanup_fn (void);
99 static tree cp_make_fname_decl (location_t, tree, int);
100 static void initialize_predefined_identifiers (void);
101 static tree check_special_function_return_type
102 (special_function_kind, tree, tree);
103 static tree push_cp_library_fn (enum tree_code, tree);
104 static tree build_cp_library_fn (tree, enum tree_code, tree);
105 static void store_parm_decls (tree);
106 static void initialize_local_var (tree, tree);
107 static void expand_static_init (tree, tree);
109 /* The following symbols are subsumed in the cp_global_trees array, and
110 listed here individually for documentation purposes.
113 tree wchar_decl_node;
115 tree vtable_entry_type;
116 tree delta_type_node;
117 tree __t_desc_type_node;
119 tree class_type_node;
120 tree unknown_type_node;
122 Array type `vtable_entry_type[]'
125 tree vtbl_ptr_type_node;
132 A FUNCTION_DECL which can call `abort'. Not necessarily the
133 one that the user will declare, but sufficient to be called
134 by routines that want to abort the program.
138 The FUNCTION_DECL for the default `::operator delete'.
140 tree global_delete_fndecl;
143 tree type_info_type_node, tinfo_decl_id, tinfo_decl_type;
144 tree tinfo_var_id; */
146 tree cp_global_trees[CPTI_MAX];
148 /* Indicates that there is a type value in some namespace, although
149 that is not necessarily in scope at the moment. */
151 tree global_type_node;
153 /* The node that holds the "name" of the global scope. */
154 tree global_scope_name;
156 #define local_names cp_function_chain->x_local_names
158 /* A list of objects which have constructors or destructors
159 which reside in the global scope. The decl is stored in
160 the TREE_VALUE slot and the initializer is stored
161 in the TREE_PURPOSE slot. */
162 tree static_aggregates;
166 /* A node for the integer constants 2, and 3. */
168 tree integer_two_node, integer_three_node;
170 /* Used only for jumps to as-yet undefined labels, since jumps to
171 defined labels can have their validity checked immediately. */
173 struct GTY(()) named_label_use_entry {
174 struct named_label_use_entry *next;
175 /* The binding level to which this entry is *currently* attached.
176 This is initially the binding level in which the goto appeared,
177 but is modified as scopes are closed. */
178 struct cp_binding_level *binding_level;
179 /* The head of the names list that was current when the goto appeared,
180 or the inner scope popped. These are the decls that will *not* be
181 skipped when jumping to the label. */
183 /* The location of the goto, for error reporting. */
184 location_t o_goto_locus;
185 /* True if an OpenMP structured block scope has been closed since
186 the goto appeared. This means that the branch from the label will
187 illegally exit an OpenMP scope. */
191 /* A list of all LABEL_DECLs in the function that have names. Here so
192 we can clear out their names' definitions at the end of the
193 function, and so we can check the validity of jumps to these labels. */
195 struct GTY(()) named_label_entry {
196 /* The decl itself. */
199 /* The binding level to which the label is *currently* attached.
200 This is initially set to the binding level in which the label
201 is defined, but is modified as scopes are closed. */
202 struct cp_binding_level *binding_level;
203 /* The head of the names list that was current when the label was
204 defined, or the inner scope popped. These are the decls that will
205 be skipped when jumping to the label. */
207 /* A tree list of all decls from all binding levels that would be
208 crossed by a backward branch to the label. */
211 /* A list of uses of the label, before the label is defined. */
212 struct named_label_use_entry *uses;
214 /* The following bits are set after the label is defined, and are
215 updated as scopes are popped. They indicate that a backward jump
216 to the label will illegally enter a scope of the given flavor. */
222 #define named_labels cp_function_chain->x_named_labels
224 /* The number of function bodies which we are currently processing.
225 (Zero if we are at namespace scope, one inside the body of a
226 function, two inside the body of a function in a local class, etc.) */
229 /* To avoid unwanted recursion, finish_function defers all mark_used calls
230 encountered during its execution until it finishes. */
231 bool defer_mark_used_calls;
232 VEC(tree, gc) *deferred_mark_used_calls;
234 /* States indicating how grokdeclarator() should handle declspecs marked
235 with __attribute__((deprecated)). An object declared as
236 __attribute__((deprecated)) suppresses warnings of uses of other
238 enum deprecated_states deprecated_state = DEPRECATED_NORMAL;
241 /* A TREE_LIST of VAR_DECLs. The TREE_PURPOSE is a RECORD_TYPE or
242 UNION_TYPE; the TREE_VALUE is a VAR_DECL with that type. At the
243 time the VAR_DECL was declared, the type was incomplete. */
245 static GTY(()) tree incomplete_vars;
247 /* Returns the kind of template specialization we are currently
248 processing, given that it's declaration contained N_CLASS_SCOPES
249 explicit scope qualifications. */
252 current_tmpl_spec_kind (int n_class_scopes)
254 int n_template_parm_scopes = 0;
255 int seen_specialization_p = 0;
256 int innermost_specialization_p = 0;
257 struct cp_binding_level *b;
259 /* Scan through the template parameter scopes. */
260 for (b = current_binding_level;
261 b->kind == sk_template_parms;
264 /* If we see a specialization scope inside a parameter scope,
265 then something is wrong. That corresponds to a declaration
268 template <class T> template <> ...
270 which is always invalid since [temp.expl.spec] forbids the
271 specialization of a class member template if the enclosing
272 class templates are not explicitly specialized as well. */
273 if (b->explicit_spec_p)
275 if (n_template_parm_scopes == 0)
276 innermost_specialization_p = 1;
278 seen_specialization_p = 1;
280 else if (seen_specialization_p == 1)
281 return tsk_invalid_member_spec;
283 ++n_template_parm_scopes;
286 /* Handle explicit instantiations. */
287 if (processing_explicit_instantiation)
289 if (n_template_parm_scopes != 0)
290 /* We've seen a template parameter list during an explicit
291 instantiation. For example:
293 template <class T> template void f(int);
295 This is erroneous. */
296 return tsk_invalid_expl_inst;
298 return tsk_expl_inst;
301 if (n_template_parm_scopes < n_class_scopes)
302 /* We've not seen enough template headers to match all the
303 specialized classes present. For example:
305 template <class T> void R<T>::S<T>::f(int);
307 This is invalid; there needs to be one set of template
308 parameters for each class. */
309 return tsk_insufficient_parms;
310 else if (n_template_parm_scopes == n_class_scopes)
311 /* We're processing a non-template declaration (even though it may
312 be a member of a template class.) For example:
314 template <class T> void S<T>::f(int);
316 The `class T' matches the `S<T>', leaving no template headers
317 corresponding to the `f'. */
319 else if (n_template_parm_scopes > n_class_scopes + 1)
320 /* We've got too many template headers. For example:
322 template <> template <class T> void f (T);
324 There need to be more enclosing classes. */
325 return tsk_excessive_parms;
327 /* This must be a template. It's of the form:
329 template <class T> template <class U> void S<T>::f(U);
331 This is a specialization if the innermost level was a
332 specialization; otherwise it's just a definition of the
334 return innermost_specialization_p ? tsk_expl_spec : tsk_template;
337 /* Exit the current scope. */
345 /* When a label goes out of scope, check to see if that label was used
346 in a valid manner, and issue any appropriate warnings or errors. */
349 pop_label (tree label, tree old_value)
351 if (!processing_template_decl)
353 if (DECL_INITIAL (label) == NULL_TREE)
357 error ("label %q+D used but not defined", label);
358 location = input_location; /* FIXME want (input_filename, (line)0) */
359 /* Avoid crashing later. */
360 define_label (location, DECL_NAME (label));
363 warn_for_unused_label (label);
366 SET_IDENTIFIER_LABEL_VALUE (DECL_NAME (label), old_value);
369 /* At the end of a function, all labels declared within the function
370 go out of scope. BLOCK is the top-level block for the
374 pop_labels_1 (void **slot, void *data)
376 struct named_label_entry *ent = (struct named_label_entry *) *slot;
377 tree block = (tree) data;
379 pop_label (ent->label_decl, NULL_TREE);
381 /* Put the labels into the "variables" of the top-level block,
382 so debugger can see them. */
383 TREE_CHAIN (ent->label_decl) = BLOCK_VARS (block);
384 BLOCK_VARS (block) = ent->label_decl;
386 htab_clear_slot (named_labels, slot);
392 pop_labels (tree block)
396 htab_traverse (named_labels, pop_labels_1, block);
401 /* At the end of a block with local labels, restore the outer definition. */
404 pop_local_label (tree label, tree old_value)
406 struct named_label_entry dummy;
409 pop_label (label, old_value);
411 dummy.label_decl = label;
412 slot = htab_find_slot (named_labels, &dummy, NO_INSERT);
413 htab_clear_slot (named_labels, slot);
416 /* The following two routines are used to interface to Objective-C++.
417 The binding level is purposely treated as an opaque type. */
420 objc_get_current_scope (void)
422 return current_binding_level;
425 /* The following routine is used by the NeXT-style SJLJ exceptions;
426 variables get marked 'volatile' so as to not be clobbered by
427 _setjmp()/_longjmp() calls. All variables in the current scope,
428 as well as parent scopes up to (but not including) ENCLOSING_BLK
429 shall be thusly marked. */
432 objc_mark_locals_volatile (void *enclosing_blk)
434 struct cp_binding_level *scope;
436 for (scope = current_binding_level;
437 scope && scope != enclosing_blk;
438 scope = scope->level_chain)
442 for (decl = scope->names; decl; decl = TREE_CHAIN (decl))
443 objc_volatilize_decl (decl);
445 /* Do not climb up past the current function. */
446 if (scope->kind == sk_function_parms)
451 /* Update data for defined and undefined labels when leaving a scope. */
454 poplevel_named_label_1 (void **slot, void *data)
456 struct named_label_entry *ent = (struct named_label_entry *) *slot;
457 struct cp_binding_level *bl = (struct cp_binding_level *) data;
458 struct cp_binding_level *obl = bl->level_chain;
460 if (ent->binding_level == bl)
464 for (decl = ent->names_in_scope; decl; decl = TREE_CHAIN (decl))
465 if (decl_jump_unsafe (decl))
466 ent->bad_decls = tree_cons (NULL, decl, ent->bad_decls);
468 ent->binding_level = obl;
469 ent->names_in_scope = obl->names;
473 ent->in_try_scope = true;
476 ent->in_catch_scope = true;
479 ent->in_omp_scope = true;
487 struct named_label_use_entry *use;
489 for (use = ent->uses; use ; use = use->next)
490 if (use->binding_level == bl)
492 use->binding_level = obl;
493 use->names_in_scope = obl->names;
494 if (bl->kind == sk_omp)
495 use->in_omp_scope = true;
502 /* Saved errorcount to avoid -Wunused-but-set-{parameter,variable} warnings
503 when errors were reported, except for -Werror-unused-but-set-*. */
504 static int unused_but_set_errorcount;
506 /* Exit a binding level.
507 Pop the level off, and restore the state of the identifier-decl mappings
508 that were in effect when this level was entered.
510 If KEEP == 1, this level had explicit declarations, so
511 and create a "block" (a BLOCK node) for the level
512 to record its declarations and subblocks for symbol table output.
514 If FUNCTIONBODY is nonzero, this level is the body of a function,
515 so create a block as if KEEP were set and also clear out all
518 If REVERSE is nonzero, reverse the order of decls before putting
519 them into the BLOCK. */
522 poplevel (int keep, int reverse, int functionbody)
525 /* The chain of decls was accumulated in reverse order.
526 Put it into forward order, just for cleanliness. */
531 int leaving_for_scope;
534 timevar_push (TV_NAME_LOOKUP);
539 gcc_assert (current_binding_level->kind != sk_class);
541 if (current_binding_level->kind == sk_cleanup)
543 subblocks = functionbody >= 0 ? current_binding_level->blocks : 0;
545 gcc_assert (!VEC_length(cp_class_binding,
546 current_binding_level->class_shadowed));
548 /* We used to use KEEP == 2 to indicate that the new block should go
549 at the beginning of the list of blocks at this binding level,
550 rather than the end. This hack is no longer used. */
551 gcc_assert (keep == 0 || keep == 1);
553 if (current_binding_level->keep)
556 /* Any uses of undefined labels, and any defined labels, now operate
557 under constraints of next binding contour. */
558 if (cfun && !functionbody && named_labels)
559 htab_traverse (named_labels, poplevel_named_label_1,
560 current_binding_level);
562 /* Get the decls in the order they were written.
563 Usually current_binding_level->names is in reverse order.
564 But parameter decls were previously put in forward order. */
567 current_binding_level->names
568 = decls = nreverse (current_binding_level->names);
570 decls = current_binding_level->names;
572 /* If there were any declarations or structure tags in that level,
573 or if this level is a function body,
574 create a BLOCK to record them for the life of this function. */
576 if (keep == 1 || functionbody)
577 block = make_node (BLOCK);
578 if (block != NULL_TREE)
580 BLOCK_VARS (block) = decls;
581 BLOCK_SUBBLOCKS (block) = subblocks;
584 /* In each subblock, record that this is its superior. */
586 for (link = subblocks; link; link = BLOCK_CHAIN (link))
587 BLOCK_SUPERCONTEXT (link) = block;
589 /* We still support the old for-scope rules, whereby the variables
590 in a for-init statement were in scope after the for-statement
591 ended. We only use the new rules if flag_new_for_scope is
594 = current_binding_level->kind == sk_for && flag_new_for_scope == 1;
596 /* Before we remove the declarations first check for unused variables. */
597 if ((warn_unused_variable || warn_unused_but_set_variable)
598 && !processing_template_decl)
599 for (decl = getdecls (); decl; decl = TREE_CHAIN (decl))
600 if (TREE_CODE (decl) == VAR_DECL
601 && (! TREE_USED (decl) || !DECL_READ_P (decl))
602 && ! DECL_IN_SYSTEM_HEADER (decl)
603 && DECL_NAME (decl) && ! DECL_ARTIFICIAL (decl))
605 if (! TREE_USED (decl))
606 warning (OPT_Wunused_variable, "unused variable %q+D", decl);
607 else if (DECL_CONTEXT (decl) == current_function_decl
608 && TREE_TYPE (decl) != error_mark_node
609 && TREE_CODE (TREE_TYPE (decl)) != REFERENCE_TYPE
610 && errorcount == unused_but_set_errorcount
611 && (!CLASS_TYPE_P (TREE_TYPE (decl))
612 || !TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl))))
614 warning (OPT_Wunused_but_set_variable,
615 "variable %q+D set but not used", decl);
616 unused_but_set_errorcount = errorcount;
620 /* Remove declarations for all the DECLs in this level. */
621 for (link = decls; link; link = TREE_CHAIN (link))
623 if (leaving_for_scope && TREE_CODE (link) == VAR_DECL
626 tree name = DECL_NAME (link);
630 ob = outer_binding (name,
631 IDENTIFIER_BINDING (name),
634 ns_binding = IDENTIFIER_NAMESPACE_VALUE (name);
636 ns_binding = NULL_TREE;
638 if (ob && ob->scope == current_binding_level->level_chain)
639 /* We have something like:
644 and we are leaving the `for' scope. There's no reason to
645 keep the binding of the inner `i' in this case. */
646 pop_binding (name, link);
647 else if ((ob && (TREE_CODE (ob->value) == TYPE_DECL))
648 || (ns_binding && TREE_CODE (ns_binding) == TYPE_DECL))
649 /* Here, we have something like:
657 We must pop the for-scope binding so we know what's a
658 type and what isn't. */
659 pop_binding (name, link);
662 /* Mark this VAR_DECL as dead so that we can tell we left it
663 there only for backward compatibility. */
664 DECL_DEAD_FOR_LOCAL (link) = 1;
666 /* Keep track of what should have happened when we
667 popped the binding. */
670 SET_DECL_SHADOWED_FOR_VAR (link, ob->value);
671 DECL_HAS_SHADOWED_FOR_VAR_P (link) = 1;
674 /* Add it to the list of dead variables in the next
675 outermost binding to that we can remove these when we
676 leave that binding. */
677 current_binding_level->level_chain->dead_vars_from_for
678 = tree_cons (NULL_TREE, link,
679 current_binding_level->level_chain->
682 /* Although we don't pop the cxx_binding, we do clear
683 its SCOPE since the scope is going away now. */
684 IDENTIFIER_BINDING (name)->scope
685 = current_binding_level->level_chain;
692 /* Remove the binding. */
695 if (TREE_CODE (decl) == TREE_LIST)
696 decl = TREE_VALUE (decl);
699 if (TREE_CODE (name) == OVERLOAD)
700 name = OVL_FUNCTION (name);
702 gcc_assert (DECL_P (name));
703 pop_binding (DECL_NAME (name), decl);
707 /* Remove declarations for any `for' variables from inner scopes
708 that we kept around. */
709 for (link = current_binding_level->dead_vars_from_for;
710 link; link = TREE_CHAIN (link))
711 pop_binding (DECL_NAME (TREE_VALUE (link)), TREE_VALUE (link));
713 /* Restore the IDENTIFIER_TYPE_VALUEs. */
714 for (link = current_binding_level->type_shadowed;
715 link; link = TREE_CHAIN (link))
716 SET_IDENTIFIER_TYPE_VALUE (TREE_PURPOSE (link), TREE_VALUE (link));
718 /* Restore the IDENTIFIER_LABEL_VALUEs for local labels. */
719 for (link = current_binding_level->shadowed_labels;
721 link = TREE_CHAIN (link))
722 pop_local_label (TREE_VALUE (link), TREE_PURPOSE (link));
724 /* There may be OVERLOADs (wrapped in TREE_LISTs) on the BLOCK_VARs
725 list if a `using' declaration put them there. The debugging
726 back ends won't understand OVERLOAD, so we remove them here.
727 Because the BLOCK_VARS are (temporarily) shared with
728 CURRENT_BINDING_LEVEL->NAMES we must do this fixup after we have
729 popped all the bindings. */
734 for (d = &BLOCK_VARS (block); *d; )
736 if (TREE_CODE (*d) == TREE_LIST)
737 *d = TREE_CHAIN (*d);
739 d = &TREE_CHAIN (*d);
743 /* If the level being exited is the top level of a function,
744 check over all the labels. */
747 /* Since this is the top level block of a function, the vars are
748 the function's parameters. Don't leave them in the BLOCK
749 because they are found in the FUNCTION_DECL instead. */
750 BLOCK_VARS (block) = 0;
754 kind = current_binding_level->kind;
755 if (kind == sk_cleanup)
759 /* If this is a temporary binding created for a cleanup, then we'll
760 have pushed a statement list level. Pop that, create a new
761 BIND_EXPR for the block, and insert it into the stream. */
762 stmt = pop_stmt_list (current_binding_level->statement_list);
763 stmt = c_build_bind_expr (input_location, block, stmt);
770 /* The current function is being defined, so its DECL_INITIAL
771 should be error_mark_node. */
772 gcc_assert (DECL_INITIAL (current_function_decl) == error_mark_node);
773 DECL_INITIAL (current_function_decl) = block;
776 current_binding_level->blocks
777 = chainon (current_binding_level->blocks, block);
779 /* If we did not make a block for the level just exited,
780 any blocks made for inner levels
781 (since they cannot be recorded as subblocks in that level)
782 must be carried forward so they will later become subblocks
783 of something else. */
785 current_binding_level->blocks
786 = chainon (current_binding_level->blocks, subblocks);
788 /* Each and every BLOCK node created here in `poplevel' is important
789 (e.g. for proper debugging information) so if we created one
790 earlier, mark it as "used". */
792 TREE_USED (block) = 1;
794 /* All temporary bindings created for cleanups are popped silently. */
795 if (kind == sk_cleanup)
798 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, block);
801 /* Walk all the namespaces contained NAMESPACE, including NAMESPACE
802 itself, calling F for each. The DATA is passed to F as well. */
805 walk_namespaces_r (tree name_space, walk_namespaces_fn f, void* data)
808 tree current = NAMESPACE_LEVEL (name_space)->namespaces;
810 result |= (*f) (name_space, data);
812 for (; current; current = TREE_CHAIN (current))
813 result |= walk_namespaces_r (current, f, data);
818 /* Walk all the namespaces, calling F for each. The DATA is passed to
822 walk_namespaces (walk_namespaces_fn f, void* data)
824 return walk_namespaces_r (global_namespace, f, data);
827 /* Call wrapup_globals_declarations for the globals in NAMESPACE. If
828 DATA is non-NULL, this is the last time we will call
829 wrapup_global_declarations for this NAMESPACE. */
832 wrapup_globals_for_namespace (tree name_space, void* data)
834 struct cp_binding_level *level = NAMESPACE_LEVEL (name_space);
835 VEC(tree,gc) *statics = level->static_decls;
836 tree *vec = VEC_address (tree, statics);
837 int len = VEC_length (tree, statics);
838 int last_time = (data != 0);
842 check_global_declarations (vec, len);
843 emit_debug_global_declarations (vec, len);
847 /* Write out any globals that need to be output. */
848 return wrapup_global_declarations (vec, len);
852 /* In C++, you don't have to write `struct S' to refer to `S'; you
853 can just use `S'. We accomplish this by creating a TYPE_DECL as
854 if the user had written `typedef struct S S'. Create and return
855 the TYPE_DECL for TYPE. */
858 create_implicit_typedef (tree name, tree type)
862 decl = build_decl (input_location, TYPE_DECL, name, type);
863 DECL_ARTIFICIAL (decl) = 1;
864 /* There are other implicit type declarations, like the one *within*
865 a class that allows you to write `S::S'. We must distinguish
867 SET_DECL_IMPLICIT_TYPEDEF_P (decl);
868 TYPE_NAME (type) = decl;
869 TYPE_STUB_DECL (type) = decl;
874 /* Remember a local name for name-mangling purposes. */
877 push_local_name (tree decl)
882 timevar_push (TV_NAME_LOOKUP);
884 name = DECL_NAME (decl);
886 nelts = VEC_length (tree, local_names);
887 for (i = 0; i < nelts; i++)
889 t = VEC_index (tree, local_names, i);
890 if (DECL_NAME (t) == name)
892 if (!DECL_LANG_SPECIFIC (decl))
893 retrofit_lang_decl (decl);
894 DECL_LANG_SPECIFIC (decl)->u.base.u2sel = 1;
895 if (DECL_LANG_SPECIFIC (t))
896 DECL_DISCRIMINATOR (decl) = DECL_DISCRIMINATOR (t) + 1;
898 DECL_DISCRIMINATOR (decl) = 1;
900 VEC_replace (tree, local_names, i, decl);
901 timevar_pop (TV_NAME_LOOKUP);
906 VEC_safe_push (tree, gc, local_names, decl);
907 timevar_pop (TV_NAME_LOOKUP);
910 /* Subroutine of duplicate_decls: return truthvalue of whether
911 or not types of these decls match.
913 For C++, we must compare the parameter list so that `int' can match
914 `int&' in a parameter position, but `int&' is not confused with
918 decls_match (tree newdecl, tree olddecl)
922 if (newdecl == olddecl)
925 if (TREE_CODE (newdecl) != TREE_CODE (olddecl))
926 /* If the two DECLs are not even the same kind of thing, we're not
927 interested in their types. */
930 if (TREE_CODE (newdecl) == FUNCTION_DECL)
932 tree f1 = TREE_TYPE (newdecl);
933 tree f2 = TREE_TYPE (olddecl);
934 tree p1 = TYPE_ARG_TYPES (f1);
935 tree p2 = TYPE_ARG_TYPES (f2);
937 /* Specializations of different templates are different functions
938 even if they have the same type. */
939 tree t1 = (DECL_USE_TEMPLATE (newdecl)
940 ? DECL_TI_TEMPLATE (newdecl)
942 tree t2 = (DECL_USE_TEMPLATE (olddecl)
943 ? DECL_TI_TEMPLATE (olddecl)
948 if (CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl)
949 && ! (DECL_EXTERN_C_P (newdecl)
950 && DECL_EXTERN_C_P (olddecl)))
953 #ifdef NO_IMPLICIT_EXTERN_C
954 /* A new declaration doesn't match a built-in one unless it
955 is also extern "C". */
956 if (DECL_IS_BUILTIN (olddecl)
957 && DECL_EXTERN_C_P (olddecl) && !DECL_EXTERN_C_P (newdecl))
961 if (TREE_CODE (f1) != TREE_CODE (f2))
964 if (same_type_p (TREE_TYPE (f1), TREE_TYPE (f2)))
966 if (p2 == NULL_TREE && DECL_EXTERN_C_P (olddecl)
967 && (DECL_BUILT_IN (olddecl)
968 #ifndef NO_IMPLICIT_EXTERN_C
969 || (DECL_IN_SYSTEM_HEADER (newdecl) && !DECL_CLASS_SCOPE_P (newdecl))
970 || (DECL_IN_SYSTEM_HEADER (olddecl) && !DECL_CLASS_SCOPE_P (olddecl))
974 types_match = self_promoting_args_p (p1);
975 if (p1 == void_list_node)
976 TREE_TYPE (newdecl) = TREE_TYPE (olddecl);
978 #ifndef NO_IMPLICIT_EXTERN_C
979 else if (p1 == NULL_TREE
980 && (DECL_EXTERN_C_P (olddecl)
981 && DECL_IN_SYSTEM_HEADER (olddecl)
982 && !DECL_CLASS_SCOPE_P (olddecl))
983 && (DECL_EXTERN_C_P (newdecl)
984 && DECL_IN_SYSTEM_HEADER (newdecl)
985 && !DECL_CLASS_SCOPE_P (newdecl)))
987 types_match = self_promoting_args_p (p2);
988 TREE_TYPE (newdecl) = TREE_TYPE (olddecl);
992 types_match = compparms (p1, p2);
997 else if (TREE_CODE (newdecl) == TEMPLATE_DECL)
999 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl))
1000 != TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)))
1003 if (!comp_template_parms (DECL_TEMPLATE_PARMS (newdecl),
1004 DECL_TEMPLATE_PARMS (olddecl)))
1007 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
1008 types_match = same_type_p (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl)),
1009 TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl)));
1011 types_match = decls_match (DECL_TEMPLATE_RESULT (olddecl),
1012 DECL_TEMPLATE_RESULT (newdecl));
1016 /* Need to check scope for variable declaration (VAR_DECL).
1017 For typedef (TYPE_DECL), scope is ignored. */
1018 if (TREE_CODE (newdecl) == VAR_DECL
1019 && CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl)
1021 Two declarations for an object with C language linkage
1022 with the same name (ignoring the namespace that qualify
1023 it) that appear in different namespace scopes refer to
1025 && !(DECL_EXTERN_C_P (olddecl) && DECL_EXTERN_C_P (newdecl)))
1028 if (TREE_TYPE (newdecl) == error_mark_node)
1029 types_match = TREE_TYPE (olddecl) == error_mark_node;
1030 else if (TREE_TYPE (olddecl) == NULL_TREE)
1031 types_match = TREE_TYPE (newdecl) == NULL_TREE;
1032 else if (TREE_TYPE (newdecl) == NULL_TREE)
1035 types_match = comptypes (TREE_TYPE (newdecl),
1036 TREE_TYPE (olddecl),
1037 COMPARE_REDECLARATION);
1043 /* If NEWDECL is `static' and an `extern' was seen previously,
1044 warn about it. OLDDECL is the previous declaration.
1046 Note that this does not apply to the C++ case of declaring
1047 a variable `extern const' and then later `const'.
1049 Don't complain about built-in functions, since they are beyond
1050 the user's control. */
1053 warn_extern_redeclared_static (tree newdecl, tree olddecl)
1055 if (TREE_CODE (newdecl) == TYPE_DECL
1056 || TREE_CODE (newdecl) == TEMPLATE_DECL
1057 || TREE_CODE (newdecl) == CONST_DECL
1058 || TREE_CODE (newdecl) == NAMESPACE_DECL)
1061 /* Don't get confused by static member functions; that's a different
1063 if (TREE_CODE (newdecl) == FUNCTION_DECL
1064 && DECL_STATIC_FUNCTION_P (newdecl))
1067 /* If the old declaration was `static', or the new one isn't, then
1068 then everything is OK. */
1069 if (DECL_THIS_STATIC (olddecl) || !DECL_THIS_STATIC (newdecl))
1072 /* It's OK to declare a builtin function as `static'. */
1073 if (TREE_CODE (olddecl) == FUNCTION_DECL
1074 && DECL_ARTIFICIAL (olddecl))
1077 permerror (input_location, "%qD was declared %<extern%> and later %<static%>", newdecl);
1078 permerror (input_location, "previous declaration of %q+D", olddecl);
1081 /* NEW_DECL is a redeclaration of OLD_DECL; both are functions or
1082 function templates. If their exception specifications do not
1083 match, issue a diagnostic. */
1086 check_redeclaration_exception_specification (tree new_decl,
1091 tree new_exceptions;
1092 tree old_exceptions;
1094 new_type = TREE_TYPE (new_decl);
1095 new_exceptions = TYPE_RAISES_EXCEPTIONS (new_type);
1096 old_type = TREE_TYPE (old_decl);
1097 old_exceptions = TYPE_RAISES_EXCEPTIONS (old_type);
1101 If any declaration of a function has an exception-specification,
1102 all declarations, including the definition and an explicit
1103 specialization, of that function shall have an
1104 exception-specification with the same set of type-ids. */
1105 if ((pedantic || ! DECL_IN_SYSTEM_HEADER (old_decl))
1106 && ! DECL_IS_BUILTIN (old_decl)
1108 && !comp_except_specs (new_exceptions, old_exceptions,
1111 error ("declaration of %qF throws different exceptions", new_decl);
1112 error ("from previous declaration %q+F", old_decl);
1116 #define GNU_INLINE_P(fn) (DECL_DECLARED_INLINE_P (fn) \
1117 && lookup_attribute ("gnu_inline", \
1118 DECL_ATTRIBUTES (fn)))
1120 /* If NEWDECL is a redeclaration of OLDDECL, merge the declarations.
1121 If the redeclaration is invalid, a diagnostic is issued, and the
1122 error_mark_node is returned. Otherwise, OLDDECL is returned.
1124 If NEWDECL is not a redeclaration of OLDDECL, NULL_TREE is
1127 NEWDECL_IS_FRIEND is true if NEWDECL was declared as a friend. */
1130 duplicate_decls (tree newdecl, tree olddecl, bool newdecl_is_friend)
1132 unsigned olddecl_uid = DECL_UID (olddecl);
1133 int olddecl_friend = 0, types_match = 0, hidden_friend = 0;
1134 int new_defines_function = 0;
1135 tree new_template_info;
1137 if (newdecl == olddecl)
1140 types_match = decls_match (newdecl, olddecl);
1142 /* If either the type of the new decl or the type of the old decl is an
1143 error_mark_node, then that implies that we have already issued an
1144 error (earlier) for some bogus type specification, and in that case,
1145 it is rather pointless to harass the user with yet more error message
1146 about the same declaration, so just pretend the types match here. */
1147 if (TREE_TYPE (newdecl) == error_mark_node
1148 || TREE_TYPE (olddecl) == error_mark_node)
1149 return error_mark_node;
1151 if (DECL_P (olddecl)
1152 && TREE_CODE (newdecl) == FUNCTION_DECL
1153 && TREE_CODE (olddecl) == FUNCTION_DECL
1154 && (DECL_UNINLINABLE (newdecl) || DECL_UNINLINABLE (olddecl)))
1156 if (DECL_DECLARED_INLINE_P (newdecl)
1157 && DECL_UNINLINABLE (newdecl)
1158 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl)))
1159 /* Already warned elsewhere. */;
1160 else if (DECL_DECLARED_INLINE_P (olddecl)
1161 && DECL_UNINLINABLE (olddecl)
1162 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl)))
1163 /* Already warned. */;
1164 else if (DECL_DECLARED_INLINE_P (newdecl)
1165 && DECL_UNINLINABLE (olddecl)
1166 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl)))
1168 warning (OPT_Wattributes, "function %q+D redeclared as inline",
1170 warning (OPT_Wattributes, "previous declaration of %q+D "
1171 "with attribute noinline", olddecl);
1173 else if (DECL_DECLARED_INLINE_P (olddecl)
1174 && DECL_UNINLINABLE (newdecl)
1175 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl)))
1177 warning (OPT_Wattributes, "function %q+D redeclared with "
1178 "attribute noinline", newdecl);
1179 warning (OPT_Wattributes, "previous declaration of %q+D was inline",
1184 /* Check for redeclaration and other discrepancies. */
1185 if (TREE_CODE (olddecl) == FUNCTION_DECL
1186 && DECL_ARTIFICIAL (olddecl))
1188 gcc_assert (!DECL_HIDDEN_FRIEND_P (olddecl));
1189 if (TREE_CODE (newdecl) != FUNCTION_DECL)
1191 /* Avoid warnings redeclaring built-ins which have not been
1192 explicitly declared. */
1193 if (DECL_ANTICIPATED (olddecl))
1196 /* If you declare a built-in or predefined function name as static,
1197 the old definition is overridden, but optionally warn this was a
1198 bad choice of name. */
1199 if (! TREE_PUBLIC (newdecl))
1201 warning (OPT_Wshadow,
1202 DECL_BUILT_IN (olddecl)
1203 ? G_("shadowing built-in function %q#D")
1204 : G_("shadowing library function %q#D"), olddecl);
1205 /* Discard the old built-in function. */
1208 /* If the built-in is not ansi, then programs can override
1209 it even globally without an error. */
1210 else if (! DECL_BUILT_IN (olddecl))
1211 warning (0, "library function %q#D redeclared as non-function %q#D",
1215 error ("declaration of %q#D", newdecl);
1216 error ("conflicts with built-in declaration %q#D",
1221 else if (!types_match)
1223 /* Avoid warnings redeclaring built-ins which have not been
1224 explicitly declared. */
1225 if (DECL_ANTICIPATED (olddecl))
1227 /* Deal with fileptr_type_node. FILE type is not known
1228 at the time we create the builtins. */
1231 for (t1 = TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1232 t2 = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1234 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2))
1237 else if (TREE_VALUE (t2) == fileptr_type_node)
1239 tree t = TREE_VALUE (t1);
1241 if (TREE_CODE (t) == POINTER_TYPE
1242 && TYPE_NAME (TREE_TYPE (t))
1243 && DECL_NAME (TYPE_NAME (TREE_TYPE (t)))
1244 == get_identifier ("FILE")
1245 && compparms (TREE_CHAIN (t1), TREE_CHAIN (t2)))
1247 tree oldargs = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1249 TYPE_ARG_TYPES (TREE_TYPE (olddecl))
1250 = TYPE_ARG_TYPES (TREE_TYPE (newdecl));
1251 types_match = decls_match (newdecl, olddecl);
1253 return duplicate_decls (newdecl, olddecl,
1255 TYPE_ARG_TYPES (TREE_TYPE (olddecl)) = oldargs;
1258 else if (! same_type_p (TREE_VALUE (t1), TREE_VALUE (t2)))
1261 else if ((DECL_EXTERN_C_P (newdecl)
1262 && DECL_EXTERN_C_P (olddecl))
1263 || compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1264 TYPE_ARG_TYPES (TREE_TYPE (olddecl))))
1266 /* A near match; override the builtin. */
1268 if (TREE_PUBLIC (newdecl))
1270 warning (0, "new declaration %q#D", newdecl);
1271 warning (0, "ambiguates built-in declaration %q#D",
1275 warning (OPT_Wshadow,
1276 DECL_BUILT_IN (olddecl)
1277 ? G_("shadowing built-in function %q#D")
1278 : G_("shadowing library function %q#D"), olddecl);
1281 /* Discard the old built-in function. */
1284 /* Replace the old RTL to avoid problems with inlining. */
1285 COPY_DECL_RTL (newdecl, olddecl);
1287 /* Even if the types match, prefer the new declarations type for
1288 built-ins which have not been explicitly declared, for
1289 exception lists, etc... */
1290 else if (DECL_ANTICIPATED (olddecl))
1292 tree type = TREE_TYPE (newdecl);
1293 tree attribs = (*targetm.merge_type_attributes)
1294 (TREE_TYPE (olddecl), type);
1296 type = cp_build_type_attribute_variant (type, attribs);
1297 TREE_TYPE (newdecl) = TREE_TYPE (olddecl) = type;
1300 /* If a function is explicitly declared "throw ()", propagate that to
1301 the corresponding builtin. */
1302 if (DECL_BUILT_IN_CLASS (olddecl) == BUILT_IN_NORMAL
1303 && DECL_ANTICIPATED (olddecl)
1304 && TREE_NOTHROW (newdecl)
1305 && !TREE_NOTHROW (olddecl)
1306 && built_in_decls [DECL_FUNCTION_CODE (olddecl)] != NULL_TREE
1307 && built_in_decls [DECL_FUNCTION_CODE (olddecl)] != olddecl
1309 TREE_NOTHROW (built_in_decls [DECL_FUNCTION_CODE (olddecl)]) = 1;
1311 /* Whether or not the builtin can throw exceptions has no
1312 bearing on this declarator. */
1313 TREE_NOTHROW (olddecl) = 0;
1315 if (DECL_THIS_STATIC (newdecl) && !DECL_THIS_STATIC (olddecl))
1317 /* If a builtin function is redeclared as `static', merge
1318 the declarations, but make the original one static. */
1319 DECL_THIS_STATIC (olddecl) = 1;
1320 TREE_PUBLIC (olddecl) = 0;
1322 /* Make the old declaration consistent with the new one so
1323 that all remnants of the builtin-ness of this function
1324 will be banished. */
1325 SET_DECL_LANGUAGE (olddecl, DECL_LANGUAGE (newdecl));
1326 COPY_DECL_RTL (newdecl, olddecl);
1329 else if (TREE_CODE (olddecl) != TREE_CODE (newdecl))
1331 /* C++ Standard, 3.3, clause 4:
1332 "[Note: a namespace name or a class template name must be unique
1333 in its declarative region (7.3.2, clause 14). ]" */
1334 if (TREE_CODE (olddecl) != NAMESPACE_DECL
1335 && TREE_CODE (newdecl) != NAMESPACE_DECL
1336 && (TREE_CODE (olddecl) != TEMPLATE_DECL
1337 || TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) != TYPE_DECL)
1338 && (TREE_CODE (newdecl) != TEMPLATE_DECL
1339 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) != TYPE_DECL))
1341 if ((TREE_CODE (olddecl) == TYPE_DECL && DECL_ARTIFICIAL (olddecl)
1342 && TREE_CODE (newdecl) != TYPE_DECL)
1343 || (TREE_CODE (newdecl) == TYPE_DECL && DECL_ARTIFICIAL (newdecl)
1344 && TREE_CODE (olddecl) != TYPE_DECL))
1346 /* We do nothing special here, because C++ does such nasty
1347 things with TYPE_DECLs. Instead, just let the TYPE_DECL
1348 get shadowed, and know that if we need to find a TYPE_DECL
1349 for a given name, we can look in the IDENTIFIER_TYPE_VALUE
1350 slot of the identifier. */
1354 if ((TREE_CODE (newdecl) == FUNCTION_DECL
1355 && DECL_FUNCTION_TEMPLATE_P (olddecl))
1356 || (TREE_CODE (olddecl) == FUNCTION_DECL
1357 && DECL_FUNCTION_TEMPLATE_P (newdecl)))
1361 error ("%q#D redeclared as different kind of symbol", newdecl);
1362 if (TREE_CODE (olddecl) == TREE_LIST)
1363 olddecl = TREE_VALUE (olddecl);
1364 error ("previous declaration of %q+#D", olddecl);
1366 return error_mark_node;
1368 else if (!types_match)
1370 if (CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl))
1371 /* These are certainly not duplicate declarations; they're
1372 from different scopes. */
1375 if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1377 /* The name of a class template may not be declared to refer to
1378 any other template, class, function, object, namespace, value,
1379 or type in the same scope. */
1380 if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) == TYPE_DECL
1381 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
1383 error ("declaration of template %q#D", newdecl);
1384 error ("conflicts with previous declaration %q+#D", olddecl);
1386 else if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) == FUNCTION_DECL
1387 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == FUNCTION_DECL
1388 && compparms (TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl))),
1389 TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl))))
1390 && comp_template_parms (DECL_TEMPLATE_PARMS (newdecl),
1391 DECL_TEMPLATE_PARMS (olddecl))
1392 /* Template functions can be disambiguated by
1394 && same_type_p (TREE_TYPE (TREE_TYPE (newdecl)),
1395 TREE_TYPE (TREE_TYPE (olddecl))))
1397 error ("new declaration %q#D", newdecl);
1398 error ("ambiguates old declaration %q+#D", olddecl);
1402 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1404 if (DECL_EXTERN_C_P (newdecl) && DECL_EXTERN_C_P (olddecl))
1406 error ("declaration of C function %q#D conflicts with",
1408 error ("previous declaration %q+#D here", olddecl);
1410 else if (compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1411 TYPE_ARG_TYPES (TREE_TYPE (olddecl))))
1413 error ("new declaration %q#D", newdecl);
1414 error ("ambiguates old declaration %q+#D", olddecl);
1415 return error_mark_node;
1422 error ("conflicting declaration %q#D", newdecl);
1423 error ("%q+D has a previous declaration as %q#D", olddecl, olddecl);
1424 return error_mark_node;
1427 else if (TREE_CODE (newdecl) == FUNCTION_DECL
1428 && ((DECL_TEMPLATE_SPECIALIZATION (olddecl)
1429 && (!DECL_TEMPLATE_INFO (newdecl)
1430 || (DECL_TI_TEMPLATE (newdecl)
1431 != DECL_TI_TEMPLATE (olddecl))))
1432 || (DECL_TEMPLATE_SPECIALIZATION (newdecl)
1433 && (!DECL_TEMPLATE_INFO (olddecl)
1434 || (DECL_TI_TEMPLATE (olddecl)
1435 != DECL_TI_TEMPLATE (newdecl))))))
1436 /* It's OK to have a template specialization and a non-template
1437 with the same type, or to have specializations of two
1438 different templates with the same type. Note that if one is a
1439 specialization, and the other is an instantiation of the same
1440 template, that we do not exit at this point. That situation
1441 can occur if we instantiate a template class, and then
1442 specialize one of its methods. This situation is valid, but
1443 the declarations must be merged in the usual way. */
1445 else if (TREE_CODE (newdecl) == FUNCTION_DECL
1446 && ((DECL_TEMPLATE_INSTANTIATION (olddecl)
1447 && !DECL_USE_TEMPLATE (newdecl))
1448 || (DECL_TEMPLATE_INSTANTIATION (newdecl)
1449 && !DECL_USE_TEMPLATE (olddecl))))
1450 /* One of the declarations is a template instantiation, and the
1451 other is not a template at all. That's OK. */
1453 else if (TREE_CODE (newdecl) == NAMESPACE_DECL)
1455 /* In [namespace.alias] we have:
1457 In a declarative region, a namespace-alias-definition can be
1458 used to redefine a namespace-alias declared in that declarative
1459 region to refer only to the namespace to which it already
1462 Therefore, if we encounter a second alias directive for the same
1463 alias, we can just ignore the second directive. */
1464 if (DECL_NAMESPACE_ALIAS (newdecl)
1465 && (DECL_NAMESPACE_ALIAS (newdecl)
1466 == DECL_NAMESPACE_ALIAS (olddecl)))
1468 /* [namespace.alias]
1470 A namespace-name or namespace-alias shall not be declared as
1471 the name of any other entity in the same declarative region.
1472 A namespace-name defined at global scope shall not be
1473 declared as the name of any other entity in any global scope
1475 error ("declaration of namespace %qD conflicts with", newdecl);
1476 error ("previous declaration of namespace %q+D here", olddecl);
1477 return error_mark_node;
1481 const char *errmsg = redeclaration_error_message (newdecl, olddecl);
1484 error_at (DECL_SOURCE_LOCATION (newdecl), errmsg, newdecl);
1485 if (DECL_NAME (olddecl) != NULL_TREE)
1486 error ((DECL_INITIAL (olddecl) && namespace_bindings_p ())
1487 ? "%q+#D previously defined here"
1488 : "%q+#D previously declared here", olddecl);
1489 return error_mark_node;
1491 else if (TREE_CODE (olddecl) == FUNCTION_DECL
1492 && DECL_INITIAL (olddecl) != NULL_TREE
1493 && TYPE_ARG_TYPES (TREE_TYPE (olddecl)) == NULL_TREE
1494 && TYPE_ARG_TYPES (TREE_TYPE (newdecl)) != NULL_TREE)
1496 /* Prototype decl follows defn w/o prototype. */
1497 warning_at (input_location, 0, "prototype for %q+#D", newdecl);
1498 warning_at (DECL_SOURCE_LOCATION (olddecl), 0,
1499 "follows non-prototype definition here");
1501 else if ((TREE_CODE (olddecl) == FUNCTION_DECL
1502 || TREE_CODE (olddecl) == VAR_DECL)
1503 && DECL_LANGUAGE (newdecl) != DECL_LANGUAGE (olddecl))
1506 If two declarations of the same function or object
1507 specify different linkage-specifications ..., the program
1508 is ill-formed.... Except for functions with C++ linkage,
1509 a function declaration without a linkage specification
1510 shall not precede the first linkage specification for
1511 that function. A function can be declared without a
1512 linkage specification after an explicit linkage
1513 specification has been seen; the linkage explicitly
1514 specified in the earlier declaration is not affected by
1515 such a function declaration.
1517 DR 563 raises the question why the restrictions on
1518 functions should not also apply to objects. Older
1519 versions of G++ silently ignore the linkage-specification
1527 which is clearly wrong. Therefore, we now treat objects
1529 if (current_lang_depth () == 0)
1531 /* There is no explicit linkage-specification, so we use
1532 the linkage from the previous declaration. */
1533 if (!DECL_LANG_SPECIFIC (newdecl))
1534 retrofit_lang_decl (newdecl);
1535 SET_DECL_LANGUAGE (newdecl, DECL_LANGUAGE (olddecl));
1539 error ("previous declaration of %q+#D with %qL linkage",
1540 olddecl, DECL_LANGUAGE (olddecl));
1541 error ("conflicts with new declaration with %qL linkage",
1542 DECL_LANGUAGE (newdecl));
1546 if (DECL_LANG_SPECIFIC (olddecl) && DECL_USE_TEMPLATE (olddecl))
1548 else if (TREE_CODE (olddecl) == FUNCTION_DECL)
1550 tree t1 = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1551 tree t2 = TYPE_ARG_TYPES (TREE_TYPE (newdecl));
1554 if (TREE_CODE (TREE_TYPE (newdecl)) == METHOD_TYPE)
1555 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2);
1557 for (; t1 && t1 != void_list_node;
1558 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2), i++)
1559 if (TREE_PURPOSE (t1) && TREE_PURPOSE (t2))
1561 if (1 == simple_cst_equal (TREE_PURPOSE (t1),
1564 permerror (input_location, "default argument given for parameter %d of %q#D",
1566 permerror (input_location, "after previous specification in %q+#D", olddecl);
1570 error ("default argument given for parameter %d of %q#D",
1572 error ("after previous specification in %q+#D",
1579 /* Do not merge an implicit typedef with an explicit one. In:
1583 typedef class A A __attribute__ ((foo));
1585 the attribute should apply only to the typedef. */
1586 if (TREE_CODE (olddecl) == TYPE_DECL
1587 && (DECL_IMPLICIT_TYPEDEF_P (olddecl)
1588 || DECL_IMPLICIT_TYPEDEF_P (newdecl)))
1591 /* If new decl is `static' and an `extern' was seen previously,
1593 warn_extern_redeclared_static (newdecl, olddecl);
1595 /* We have committed to returning 1 at this point. */
1596 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1598 /* Now that functions must hold information normally held
1599 by field decls, there is extra work to do so that
1600 declaration information does not get destroyed during
1602 if (DECL_VINDEX (olddecl))
1603 DECL_VINDEX (newdecl) = DECL_VINDEX (olddecl);
1604 if (DECL_CONTEXT (olddecl))
1605 DECL_CONTEXT (newdecl) = DECL_CONTEXT (olddecl);
1606 DECL_STATIC_CONSTRUCTOR (newdecl) |= DECL_STATIC_CONSTRUCTOR (olddecl);
1607 DECL_STATIC_DESTRUCTOR (newdecl) |= DECL_STATIC_DESTRUCTOR (olddecl);
1608 DECL_PURE_VIRTUAL_P (newdecl) |= DECL_PURE_VIRTUAL_P (olddecl);
1609 DECL_VIRTUAL_P (newdecl) |= DECL_VIRTUAL_P (olddecl);
1610 DECL_INVALID_OVERRIDER_P (newdecl) |= DECL_INVALID_OVERRIDER_P (olddecl);
1611 DECL_THIS_STATIC (newdecl) |= DECL_THIS_STATIC (olddecl);
1612 if (DECL_OVERLOADED_OPERATOR_P (olddecl) != ERROR_MARK)
1613 SET_OVERLOADED_OPERATOR_CODE
1614 (newdecl, DECL_OVERLOADED_OPERATOR_P (olddecl));
1615 new_defines_function = DECL_INITIAL (newdecl) != NULL_TREE;
1617 /* Optionally warn about more than one declaration for the same
1618 name, but don't warn about a function declaration followed by a
1620 if (warn_redundant_decls && ! DECL_ARTIFICIAL (olddecl)
1621 && !(new_defines_function && DECL_INITIAL (olddecl) == NULL_TREE)
1622 /* Don't warn about extern decl followed by definition. */
1623 && !(DECL_EXTERNAL (olddecl) && ! DECL_EXTERNAL (newdecl))
1624 /* Don't warn about friends, let add_friend take care of it. */
1625 && ! (newdecl_is_friend || DECL_FRIEND_P (olddecl)))
1627 warning (OPT_Wredundant_decls, "redundant redeclaration of %qD in same scope", newdecl);
1628 warning (OPT_Wredundant_decls, "previous declaration of %q+D", olddecl);
1631 if (DECL_DELETED_FN (newdecl))
1633 error ("deleted definition of %qD", newdecl);
1634 error ("after previous declaration %q+D", olddecl);
1638 /* Deal with C++: must preserve virtual function table size. */
1639 if (TREE_CODE (olddecl) == TYPE_DECL)
1641 tree newtype = TREE_TYPE (newdecl);
1642 tree oldtype = TREE_TYPE (olddecl);
1644 if (newtype != error_mark_node && oldtype != error_mark_node
1645 && TYPE_LANG_SPECIFIC (newtype) && TYPE_LANG_SPECIFIC (oldtype))
1646 CLASSTYPE_FRIEND_CLASSES (newtype)
1647 = CLASSTYPE_FRIEND_CLASSES (oldtype);
1649 DECL_ORIGINAL_TYPE (newdecl) = DECL_ORIGINAL_TYPE (olddecl);
1652 /* Copy all the DECL_... slots specified in the new decl
1653 except for any that we copy here from the old type. */
1654 DECL_ATTRIBUTES (newdecl)
1655 = (*targetm.merge_decl_attributes) (olddecl, newdecl);
1657 if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1661 old_result = DECL_TEMPLATE_RESULT (olddecl);
1662 new_result = DECL_TEMPLATE_RESULT (newdecl);
1663 TREE_TYPE (olddecl) = TREE_TYPE (old_result);
1664 DECL_TEMPLATE_SPECIALIZATIONS (olddecl)
1665 = chainon (DECL_TEMPLATE_SPECIALIZATIONS (olddecl),
1666 DECL_TEMPLATE_SPECIALIZATIONS (newdecl));
1668 DECL_ATTRIBUTES (old_result)
1669 = (*targetm.merge_decl_attributes) (old_result, new_result);
1671 if (DECL_FUNCTION_TEMPLATE_P (newdecl))
1673 if (GNU_INLINE_P (old_result) != GNU_INLINE_P (new_result)
1674 && DECL_INITIAL (new_result))
1676 if (DECL_INITIAL (old_result))
1677 DECL_UNINLINABLE (old_result) = 1;
1679 DECL_UNINLINABLE (old_result) = DECL_UNINLINABLE (new_result);
1680 DECL_EXTERNAL (old_result) = DECL_EXTERNAL (new_result);
1681 DECL_NOT_REALLY_EXTERN (old_result)
1682 = DECL_NOT_REALLY_EXTERN (new_result);
1683 DECL_INTERFACE_KNOWN (old_result)
1684 = DECL_INTERFACE_KNOWN (new_result);
1685 DECL_DECLARED_INLINE_P (old_result)
1686 = DECL_DECLARED_INLINE_P (new_result);
1687 DECL_DISREGARD_INLINE_LIMITS (old_result)
1688 |= DECL_DISREGARD_INLINE_LIMITS (new_result);
1693 DECL_DECLARED_INLINE_P (old_result)
1694 |= DECL_DECLARED_INLINE_P (new_result);
1695 DECL_DISREGARD_INLINE_LIMITS (old_result)
1696 |= DECL_DISREGARD_INLINE_LIMITS (new_result);
1697 check_redeclaration_exception_specification (newdecl, olddecl);
1701 /* If the new declaration is a definition, update the file and
1702 line information on the declaration, and also make
1703 the old declaration the same definition. */
1704 if (DECL_INITIAL (new_result) != NULL_TREE)
1706 DECL_SOURCE_LOCATION (olddecl)
1707 = DECL_SOURCE_LOCATION (old_result)
1708 = DECL_SOURCE_LOCATION (newdecl);
1709 DECL_INITIAL (old_result) = DECL_INITIAL (new_result);
1710 if (DECL_FUNCTION_TEMPLATE_P (newdecl))
1713 DECL_ARGUMENTS (old_result)
1714 = DECL_ARGUMENTS (new_result);
1715 for (parm = DECL_ARGUMENTS (old_result); parm;
1716 parm = TREE_CHAIN (parm))
1717 DECL_CONTEXT (parm) = old_result;
1726 /* Automatically handles default parameters. */
1727 tree oldtype = TREE_TYPE (olddecl);
1730 /* Merge the data types specified in the two decls. */
1731 newtype = merge_types (TREE_TYPE (newdecl), TREE_TYPE (olddecl));
1733 /* If merge_types produces a non-typedef type, just use the old type. */
1734 if (TREE_CODE (newdecl) == TYPE_DECL
1735 && newtype == DECL_ORIGINAL_TYPE (newdecl))
1738 if (TREE_CODE (newdecl) == VAR_DECL)
1740 DECL_THIS_EXTERN (newdecl) |= DECL_THIS_EXTERN (olddecl);
1741 DECL_INITIALIZED_P (newdecl) |= DECL_INITIALIZED_P (olddecl);
1742 DECL_NONTRIVIALLY_INITIALIZED_P (newdecl)
1743 |= DECL_NONTRIVIALLY_INITIALIZED_P (olddecl);
1744 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (newdecl)
1745 |= DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (olddecl);
1747 /* Merge the threadprivate attribute from OLDDECL into NEWDECL. */
1748 if (DECL_LANG_SPECIFIC (olddecl)
1749 && CP_DECL_THREADPRIVATE_P (olddecl))
1751 /* Allocate a LANG_SPECIFIC structure for NEWDECL, if needed. */
1752 if (!DECL_LANG_SPECIFIC (newdecl))
1753 retrofit_lang_decl (newdecl);
1755 DECL_TLS_MODEL (newdecl) = DECL_TLS_MODEL (olddecl);
1756 CP_DECL_THREADPRIVATE_P (newdecl) = 1;
1760 /* Do this after calling `merge_types' so that default
1761 parameters don't confuse us. */
1762 else if (TREE_CODE (newdecl) == FUNCTION_DECL)
1763 check_redeclaration_exception_specification (newdecl, olddecl);
1764 TREE_TYPE (newdecl) = TREE_TYPE (olddecl) = newtype;
1766 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1767 check_default_args (newdecl);
1769 /* Lay the type out, unless already done. */
1770 if (! same_type_p (newtype, oldtype)
1771 && TREE_TYPE (newdecl) != error_mark_node
1772 && !(processing_template_decl && uses_template_parms (newdecl)))
1773 layout_type (TREE_TYPE (newdecl));
1775 if ((TREE_CODE (newdecl) == VAR_DECL
1776 || TREE_CODE (newdecl) == PARM_DECL
1777 || TREE_CODE (newdecl) == RESULT_DECL
1778 || TREE_CODE (newdecl) == FIELD_DECL
1779 || TREE_CODE (newdecl) == TYPE_DECL)
1780 && !(processing_template_decl && uses_template_parms (newdecl)))
1781 layout_decl (newdecl, 0);
1783 /* Merge the type qualifiers. */
1784 if (TREE_READONLY (newdecl))
1785 TREE_READONLY (olddecl) = 1;
1786 if (TREE_THIS_VOLATILE (newdecl))
1787 TREE_THIS_VOLATILE (olddecl) = 1;
1788 if (TREE_NOTHROW (newdecl))
1789 TREE_NOTHROW (olddecl) = 1;
1791 /* Merge deprecatedness. */
1792 if (TREE_DEPRECATED (newdecl))
1793 TREE_DEPRECATED (olddecl) = 1;
1795 /* Preserve function specific target and optimization options */
1796 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1798 if (DECL_FUNCTION_SPECIFIC_TARGET (olddecl)
1799 && !DECL_FUNCTION_SPECIFIC_TARGET (newdecl))
1800 DECL_FUNCTION_SPECIFIC_TARGET (newdecl)
1801 = DECL_FUNCTION_SPECIFIC_TARGET (olddecl);
1803 if (DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl)
1804 && !DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl))
1805 DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl)
1806 = DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl);
1809 /* Merge the initialization information. */
1810 if (DECL_INITIAL (newdecl) == NULL_TREE
1811 && DECL_INITIAL (olddecl) != NULL_TREE)
1813 DECL_INITIAL (newdecl) = DECL_INITIAL (olddecl);
1814 DECL_SOURCE_LOCATION (newdecl) = DECL_SOURCE_LOCATION (olddecl);
1815 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1817 DECL_SAVED_TREE (newdecl) = DECL_SAVED_TREE (olddecl);
1818 DECL_STRUCT_FUNCTION (newdecl) = DECL_STRUCT_FUNCTION (olddecl);
1822 /* Merge the section attribute.
1823 We want to issue an error if the sections conflict but that must be
1824 done later in decl_attributes since we are called before attributes
1826 if (DECL_SECTION_NAME (newdecl) == NULL_TREE)
1827 DECL_SECTION_NAME (newdecl) = DECL_SECTION_NAME (olddecl);
1829 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1831 DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (newdecl)
1832 |= DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (olddecl);
1833 DECL_NO_LIMIT_STACK (newdecl) |= DECL_NO_LIMIT_STACK (olddecl);
1834 TREE_THIS_VOLATILE (newdecl) |= TREE_THIS_VOLATILE (olddecl);
1835 TREE_NOTHROW (newdecl) |= TREE_NOTHROW (olddecl);
1836 DECL_IS_MALLOC (newdecl) |= DECL_IS_MALLOC (olddecl);
1837 DECL_IS_OPERATOR_NEW (newdecl) |= DECL_IS_OPERATOR_NEW (olddecl);
1838 DECL_PURE_P (newdecl) |= DECL_PURE_P (olddecl);
1839 TREE_READONLY (newdecl) |= TREE_READONLY (olddecl);
1840 DECL_LOOPING_CONST_OR_PURE_P (newdecl)
1841 |= DECL_LOOPING_CONST_OR_PURE_P (olddecl);
1842 /* Keep the old RTL. */
1843 COPY_DECL_RTL (olddecl, newdecl);
1845 else if (TREE_CODE (newdecl) == VAR_DECL
1846 && (DECL_SIZE (olddecl) || !DECL_SIZE (newdecl)))
1848 /* Keep the old RTL. We cannot keep the old RTL if the old
1849 declaration was for an incomplete object and the new
1850 declaration is not since many attributes of the RTL will
1852 COPY_DECL_RTL (olddecl, newdecl);
1855 /* If cannot merge, then use the new type and qualifiers,
1856 and don't preserve the old rtl. */
1859 /* Clean out any memory we had of the old declaration. */
1860 tree oldstatic = value_member (olddecl, static_aggregates);
1862 TREE_VALUE (oldstatic) = error_mark_node;
1864 TREE_TYPE (olddecl) = TREE_TYPE (newdecl);
1865 TREE_READONLY (olddecl) = TREE_READONLY (newdecl);
1866 TREE_THIS_VOLATILE (olddecl) = TREE_THIS_VOLATILE (newdecl);
1867 TREE_SIDE_EFFECTS (olddecl) = TREE_SIDE_EFFECTS (newdecl);
1870 /* Merge the storage class information. */
1871 merge_weak (newdecl, olddecl);
1873 if (DECL_ONE_ONLY (olddecl))
1874 DECL_COMDAT_GROUP (newdecl) = DECL_COMDAT_GROUP (olddecl);
1876 DECL_DEFER_OUTPUT (newdecl) |= DECL_DEFER_OUTPUT (olddecl);
1877 TREE_PUBLIC (newdecl) = TREE_PUBLIC (olddecl);
1878 TREE_STATIC (olddecl) = TREE_STATIC (newdecl) |= TREE_STATIC (olddecl);
1879 if (! DECL_EXTERNAL (olddecl))
1880 DECL_EXTERNAL (newdecl) = 0;
1882 new_template_info = NULL_TREE;
1883 if (DECL_LANG_SPECIFIC (newdecl) && DECL_LANG_SPECIFIC (olddecl))
1885 bool new_redefines_gnu_inline = false;
1887 if (new_defines_function
1888 && ((DECL_INTERFACE_KNOWN (olddecl)
1889 && TREE_CODE (olddecl) == FUNCTION_DECL)
1890 || (TREE_CODE (olddecl) == TEMPLATE_DECL
1891 && (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl))
1892 == FUNCTION_DECL))))
1896 if (TREE_CODE (fn) == TEMPLATE_DECL)
1897 fn = DECL_TEMPLATE_RESULT (olddecl);
1899 new_redefines_gnu_inline = GNU_INLINE_P (fn) && DECL_INITIAL (fn);
1902 if (!new_redefines_gnu_inline)
1904 DECL_INTERFACE_KNOWN (newdecl) |= DECL_INTERFACE_KNOWN (olddecl);
1905 DECL_NOT_REALLY_EXTERN (newdecl) |= DECL_NOT_REALLY_EXTERN (olddecl);
1906 DECL_COMDAT (newdecl) |= DECL_COMDAT (olddecl);
1908 DECL_TEMPLATE_INSTANTIATED (newdecl)
1909 |= DECL_TEMPLATE_INSTANTIATED (olddecl);
1910 DECL_ODR_USED (newdecl) |= DECL_ODR_USED (olddecl);
1912 /* If the OLDDECL is an instantiation and/or specialization,
1913 then the NEWDECL must be too. But, it may not yet be marked
1914 as such if the caller has created NEWDECL, but has not yet
1915 figured out that it is a redeclaration. */
1916 if (!DECL_USE_TEMPLATE (newdecl))
1917 DECL_USE_TEMPLATE (newdecl) = DECL_USE_TEMPLATE (olddecl);
1919 /* Don't really know how much of the language-specific
1920 values we should copy from old to new. */
1921 DECL_IN_AGGR_P (newdecl) = DECL_IN_AGGR_P (olddecl);
1922 DECL_REPO_AVAILABLE_P (newdecl) = DECL_REPO_AVAILABLE_P (olddecl);
1923 DECL_INITIALIZED_IN_CLASS_P (newdecl)
1924 |= DECL_INITIALIZED_IN_CLASS_P (olddecl);
1926 if (LANG_DECL_HAS_MIN (newdecl))
1928 DECL_LANG_SPECIFIC (newdecl)->u.min.u2 =
1929 DECL_LANG_SPECIFIC (olddecl)->u.min.u2;
1930 if (DECL_TEMPLATE_INFO (newdecl))
1931 new_template_info = DECL_TEMPLATE_INFO (newdecl);
1932 DECL_TEMPLATE_INFO (newdecl) = DECL_TEMPLATE_INFO (olddecl);
1934 /* Only functions have these fields. */
1935 if (TREE_CODE (newdecl) == FUNCTION_DECL
1936 || DECL_FUNCTION_TEMPLATE_P (newdecl))
1938 DECL_NONCONVERTING_P (newdecl) = DECL_NONCONVERTING_P (olddecl);
1939 olddecl_friend = DECL_FRIEND_P (olddecl);
1940 hidden_friend = (DECL_ANTICIPATED (olddecl)
1941 && DECL_HIDDEN_FRIEND_P (olddecl)
1942 && newdecl_is_friend);
1943 DECL_BEFRIENDING_CLASSES (newdecl)
1944 = chainon (DECL_BEFRIENDING_CLASSES (newdecl),
1945 DECL_BEFRIENDING_CLASSES (olddecl));
1946 /* DECL_THUNKS is only valid for virtual functions,
1947 otherwise it is a DECL_FRIEND_CONTEXT. */
1948 if (DECL_VIRTUAL_P (newdecl))
1949 DECL_THUNKS (newdecl) = DECL_THUNKS (olddecl);
1951 /* Only variables have this field. */
1952 else if (TREE_CODE (newdecl) == VAR_DECL
1953 && VAR_HAD_UNKNOWN_BOUND (olddecl))
1954 SET_VAR_HAD_UNKNOWN_BOUND (newdecl);
1957 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1961 /* Merge parameter attributes. */
1962 tree oldarg, newarg;
1963 for (oldarg = DECL_ARGUMENTS(olddecl),
1964 newarg = DECL_ARGUMENTS(newdecl);
1966 oldarg = TREE_CHAIN(oldarg), newarg = TREE_CHAIN(newarg)) {
1967 DECL_ATTRIBUTES (newarg)
1968 = (*targetm.merge_decl_attributes) (oldarg, newarg);
1969 DECL_ATTRIBUTES (oldarg) = DECL_ATTRIBUTES (newarg);
1972 if (DECL_TEMPLATE_INSTANTIATION (olddecl)
1973 && !DECL_TEMPLATE_INSTANTIATION (newdecl))
1975 /* If newdecl is not a specialization, then it is not a
1976 template-related function at all. And that means that we
1977 should have exited above, returning 0. */
1978 gcc_assert (DECL_TEMPLATE_SPECIALIZATION (newdecl));
1980 if (DECL_ODR_USED (olddecl))
1981 /* From [temp.expl.spec]:
1983 If a template, a member template or the member of a class
1984 template is explicitly specialized then that
1985 specialization shall be declared before the first use of
1986 that specialization that would cause an implicit
1987 instantiation to take place, in every translation unit in
1988 which such a use occurs. */
1989 error ("explicit specialization of %qD after first use",
1992 SET_DECL_TEMPLATE_SPECIALIZATION (olddecl);
1994 /* Don't propagate visibility from the template to the
1995 specialization here. We'll do that in determine_visibility if
1997 DECL_VISIBILITY_SPECIFIED (olddecl) = 0;
1999 /* [temp.expl.spec/14] We don't inline explicit specialization
2000 just because the primary template says so. */
2002 else if (new_defines_function && DECL_INITIAL (olddecl))
2004 /* Never inline re-defined extern inline functions.
2005 FIXME: this could be better handled by keeping both
2006 function as separate declarations. */
2007 DECL_UNINLINABLE (newdecl) = 1;
2011 if (DECL_PENDING_INLINE_INFO (newdecl) == 0)
2012 DECL_PENDING_INLINE_INFO (newdecl) = DECL_PENDING_INLINE_INFO (olddecl);
2014 DECL_DECLARED_INLINE_P (newdecl) |= DECL_DECLARED_INLINE_P (olddecl);
2016 DECL_UNINLINABLE (newdecl) = DECL_UNINLINABLE (olddecl)
2017 = (DECL_UNINLINABLE (newdecl) || DECL_UNINLINABLE (olddecl));
2019 DECL_DISREGARD_INLINE_LIMITS (newdecl)
2020 = DECL_DISREGARD_INLINE_LIMITS (olddecl)
2021 = (DECL_DISREGARD_INLINE_LIMITS (newdecl)
2022 || DECL_DISREGARD_INLINE_LIMITS (olddecl));
2025 /* Preserve abstractness on cloned [cd]tors. */
2026 DECL_ABSTRACT (newdecl) = DECL_ABSTRACT (olddecl);
2028 /* Update newdecl's parms to point at olddecl. */
2029 for (parm = DECL_ARGUMENTS (newdecl); parm;
2030 parm = TREE_CHAIN (parm))
2031 DECL_CONTEXT (parm) = olddecl;
2035 SET_DECL_LANGUAGE (olddecl, DECL_LANGUAGE (newdecl));
2036 COPY_DECL_ASSEMBLER_NAME (newdecl, olddecl);
2037 COPY_DECL_RTL (newdecl, olddecl);
2039 if (! types_match || new_defines_function)
2041 /* These need to be copied so that the names are available.
2042 Note that if the types do match, we'll preserve inline
2043 info and other bits, but if not, we won't. */
2044 DECL_ARGUMENTS (olddecl) = DECL_ARGUMENTS (newdecl);
2045 DECL_RESULT (olddecl) = DECL_RESULT (newdecl);
2047 if (new_defines_function)
2048 /* If defining a function declared with other language
2049 linkage, use the previously declared language linkage. */
2050 SET_DECL_LANGUAGE (newdecl, DECL_LANGUAGE (olddecl));
2051 else if (types_match)
2053 /* If redeclaring a builtin function, and not a definition,
2054 it stays built in. */
2055 if (DECL_BUILT_IN (olddecl))
2057 DECL_BUILT_IN_CLASS (newdecl) = DECL_BUILT_IN_CLASS (olddecl);
2058 DECL_FUNCTION_CODE (newdecl) = DECL_FUNCTION_CODE (olddecl);
2059 /* If we're keeping the built-in definition, keep the rtl,
2060 regardless of declaration matches. */
2061 COPY_DECL_RTL (olddecl, newdecl);
2064 DECL_RESULT (newdecl) = DECL_RESULT (olddecl);
2065 /* Don't clear out the arguments if we're just redeclaring a
2067 if (DECL_ARGUMENTS (olddecl))
2068 DECL_ARGUMENTS (newdecl) = DECL_ARGUMENTS (olddecl);
2071 else if (TREE_CODE (newdecl) == NAMESPACE_DECL)
2072 NAMESPACE_LEVEL (newdecl) = NAMESPACE_LEVEL (olddecl);
2074 /* Now preserve various other info from the definition. */
2075 TREE_ADDRESSABLE (newdecl) = TREE_ADDRESSABLE (olddecl);
2076 TREE_ASM_WRITTEN (newdecl) = TREE_ASM_WRITTEN (olddecl);
2077 DECL_COMMON (newdecl) = DECL_COMMON (olddecl);
2078 COPY_DECL_ASSEMBLER_NAME (olddecl, newdecl);
2080 /* Warn about conflicting visibility specifications. */
2081 if (DECL_VISIBILITY_SPECIFIED (olddecl)
2082 && DECL_VISIBILITY_SPECIFIED (newdecl)
2083 && DECL_VISIBILITY (newdecl) != DECL_VISIBILITY (olddecl))
2085 warning_at (input_location, OPT_Wattributes,
2086 "%q+D: visibility attribute ignored because it", newdecl);
2087 warning_at (DECL_SOURCE_LOCATION (olddecl), OPT_Wattributes,
2088 "conflicts with previous declaration here");
2090 /* Choose the declaration which specified visibility. */
2091 if (DECL_VISIBILITY_SPECIFIED (olddecl))
2093 DECL_VISIBILITY (newdecl) = DECL_VISIBILITY (olddecl);
2094 DECL_VISIBILITY_SPECIFIED (newdecl) = 1;
2096 /* Init priority used to be merged from newdecl to olddecl by the memcpy,
2097 so keep this behavior. */
2098 if (TREE_CODE (newdecl) == VAR_DECL && DECL_HAS_INIT_PRIORITY_P (newdecl))
2100 SET_DECL_INIT_PRIORITY (olddecl, DECL_INIT_PRIORITY (newdecl));
2101 DECL_HAS_INIT_PRIORITY_P (olddecl) = 1;
2104 /* The DECL_LANG_SPECIFIC information in OLDDECL will be replaced
2105 with that from NEWDECL below. */
2106 if (DECL_LANG_SPECIFIC (olddecl))
2108 gcc_assert (DECL_LANG_SPECIFIC (olddecl)
2109 != DECL_LANG_SPECIFIC (newdecl));
2110 ggc_free (DECL_LANG_SPECIFIC (olddecl));
2113 /* Merge the USED information. */
2114 if (TREE_USED (olddecl))
2115 TREE_USED (newdecl) = 1;
2116 else if (TREE_USED (newdecl))
2117 TREE_USED (olddecl) = 1;
2118 if (TREE_CODE (newdecl) == VAR_DECL)
2120 if (DECL_READ_P (olddecl))
2121 DECL_READ_P (newdecl) = 1;
2122 else if (DECL_READ_P (newdecl))
2123 DECL_READ_P (olddecl) = 1;
2125 if (DECL_PRESERVE_P (olddecl))
2126 DECL_PRESERVE_P (newdecl) = 1;
2127 else if (DECL_PRESERVE_P (newdecl))
2128 DECL_PRESERVE_P (olddecl) = 1;
2130 if (TREE_CODE (newdecl) == FUNCTION_DECL)
2134 function_size = sizeof (struct tree_decl_common);
2136 memcpy ((char *) olddecl + sizeof (struct tree_common),
2137 (char *) newdecl + sizeof (struct tree_common),
2138 function_size - sizeof (struct tree_common));
2140 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
2141 (char *) newdecl + sizeof (struct tree_decl_common),
2142 sizeof (struct tree_function_decl) - sizeof (struct tree_decl_common));
2143 if (new_template_info)
2144 /* If newdecl is a template instantiation, it is possible that
2145 the following sequence of events has occurred:
2147 o A friend function was declared in a class template. The
2148 class template was instantiated.
2150 o The instantiation of the friend declaration was
2151 recorded on the instantiation list, and is newdecl.
2153 o Later, however, instantiate_class_template called pushdecl
2154 on the newdecl to perform name injection. But, pushdecl in
2155 turn called duplicate_decls when it discovered that another
2156 declaration of a global function with the same name already
2159 o Here, in duplicate_decls, we decided to clobber newdecl.
2161 If we're going to do that, we'd better make sure that
2162 olddecl, and not newdecl, is on the list of
2163 instantiations so that if we try to do the instantiation
2164 again we won't get the clobbered declaration. */
2165 reregister_specialization (newdecl,
2171 size_t size = tree_code_size (TREE_CODE (olddecl));
2172 memcpy ((char *) olddecl + sizeof (struct tree_common),
2173 (char *) newdecl + sizeof (struct tree_common),
2174 sizeof (struct tree_decl_common) - sizeof (struct tree_common));
2175 switch (TREE_CODE (olddecl))
2185 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
2186 (char *) newdecl + sizeof (struct tree_decl_common),
2187 size - sizeof (struct tree_decl_common)
2188 + TREE_CODE_LENGTH (TREE_CODE (newdecl)) * sizeof (char *));
2192 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
2193 (char *) newdecl + sizeof (struct tree_decl_common),
2194 sizeof (struct tree_decl_non_common) - sizeof (struct tree_decl_common)
2195 + TREE_CODE_LENGTH (TREE_CODE (newdecl)) * sizeof (char *));
2199 DECL_UID (olddecl) = olddecl_uid;
2201 DECL_FRIEND_P (olddecl) = 1;
2204 DECL_ANTICIPATED (olddecl) = 1;
2205 DECL_HIDDEN_FRIEND_P (olddecl) = 1;
2208 /* NEWDECL contains the merged attribute lists.
2209 Update OLDDECL to be the same. */
2210 DECL_ATTRIBUTES (olddecl) = DECL_ATTRIBUTES (newdecl);
2212 /* If OLDDECL had its DECL_RTL instantiated, re-invoke make_decl_rtl
2213 so that encode_section_info has a chance to look at the new decl
2214 flags and attributes. */
2215 if (DECL_RTL_SET_P (olddecl)
2216 && (TREE_CODE (olddecl) == FUNCTION_DECL
2217 || (TREE_CODE (olddecl) == VAR_DECL
2218 && TREE_STATIC (olddecl))))
2219 make_decl_rtl (olddecl);
2221 /* The NEWDECL will no longer be needed. Because every out-of-class
2222 declaration of a member results in a call to duplicate_decls,
2223 freeing these nodes represents in a significant savings. */
2229 /* Return zero if the declaration NEWDECL is valid
2230 when the declaration OLDDECL (assumed to be for the same name)
2231 has already been seen.
2232 Otherwise return an error message format string with a %s
2233 where the identifier should go. */
2236 redeclaration_error_message (tree newdecl, tree olddecl)
2238 if (TREE_CODE (newdecl) == TYPE_DECL)
2240 /* Because C++ can put things into name space for free,
2241 constructs like "typedef struct foo { ... } foo"
2242 would look like an erroneous redeclaration. */
2243 if (same_type_p (TREE_TYPE (newdecl), TREE_TYPE (olddecl)))
2246 return G_("redefinition of %q#D");
2248 else if (TREE_CODE (newdecl) == FUNCTION_DECL)
2250 /* If this is a pure function, its olddecl will actually be
2251 the original initialization to `0' (which we force to call
2252 abort()). Don't complain about redefinition in this case. */
2253 if (DECL_LANG_SPECIFIC (olddecl) && DECL_PURE_VIRTUAL_P (olddecl)
2254 && DECL_INITIAL (olddecl) == NULL_TREE)
2257 /* If both functions come from different namespaces, this is not
2258 a redeclaration - this is a conflict with a used function. */
2259 if (DECL_NAMESPACE_SCOPE_P (olddecl)
2260 && DECL_CONTEXT (olddecl) != DECL_CONTEXT (newdecl)
2261 && ! decls_match (olddecl, newdecl))
2262 return G_("%qD conflicts with used function");
2264 /* We'll complain about linkage mismatches in
2265 warn_extern_redeclared_static. */
2267 /* Defining the same name twice is no good. */
2268 if (DECL_INITIAL (olddecl) != NULL_TREE
2269 && DECL_INITIAL (newdecl) != NULL_TREE)
2271 if (DECL_NAME (olddecl) == NULL_TREE)
2272 return G_("%q#D not declared in class");
2273 else if (!GNU_INLINE_P (olddecl)
2274 || GNU_INLINE_P (newdecl))
2275 return G_("redefinition of %q#D");
2278 if (DECL_DECLARED_INLINE_P (olddecl) && DECL_DECLARED_INLINE_P (newdecl))
2280 bool olda = GNU_INLINE_P (olddecl);
2281 bool newa = GNU_INLINE_P (newdecl);
2286 return G_("%q+D redeclared inline with "
2287 "%<gnu_inline%> attribute");
2289 return G_("%q+D redeclared inline without "
2290 "%<gnu_inline%> attribute");
2296 else if (TREE_CODE (newdecl) == TEMPLATE_DECL)
2300 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
2302 if (COMPLETE_TYPE_P (TREE_TYPE (newdecl))
2303 && COMPLETE_TYPE_P (TREE_TYPE (olddecl)))
2304 return G_("redefinition of %q#D");
2308 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) != FUNCTION_DECL
2309 || (DECL_TEMPLATE_RESULT (newdecl)
2310 == DECL_TEMPLATE_RESULT (olddecl)))
2313 nt = DECL_TEMPLATE_RESULT (newdecl);
2314 if (DECL_TEMPLATE_INFO (nt))
2315 nt = DECL_TEMPLATE_RESULT (template_for_substitution (nt));
2316 ot = DECL_TEMPLATE_RESULT (olddecl);
2317 if (DECL_TEMPLATE_INFO (ot))
2318 ot = DECL_TEMPLATE_RESULT (template_for_substitution (ot));
2319 if (DECL_INITIAL (nt) && DECL_INITIAL (ot)
2320 && (!GNU_INLINE_P (ot) || GNU_INLINE_P (nt)))
2321 return G_("redefinition of %q#D");
2323 if (DECL_DECLARED_INLINE_P (ot) && DECL_DECLARED_INLINE_P (nt))
2325 bool olda = GNU_INLINE_P (ot);
2326 bool newa = GNU_INLINE_P (nt);
2331 return G_("%q+D redeclared inline with "
2332 "%<gnu_inline%> attribute");
2334 return G_("%q+D redeclared inline without "
2335 "%<gnu_inline%> attribute");
2339 /* Core issue #226 (C++0x):
2341 If a friend function template declaration specifies a
2342 default template-argument, that declaration shall be a
2343 definition and shall be the only declaration of the
2344 function template in the translation unit. */
2345 if ((cxx_dialect != cxx98)
2346 && TREE_CODE (ot) == FUNCTION_DECL && DECL_FRIEND_P (ot)
2347 && !check_default_tmpl_args (nt, DECL_TEMPLATE_PARMS (newdecl),
2348 /*is_primary=*/1, /*is_partial=*/0,
2349 /*is_friend_decl=*/2))
2350 return G_("redeclaration of friend %q#D "
2351 "may not have default template arguments");
2355 else if (TREE_CODE (newdecl) == VAR_DECL
2356 && DECL_THREAD_LOCAL_P (newdecl) != DECL_THREAD_LOCAL_P (olddecl)
2357 && (! DECL_LANG_SPECIFIC (olddecl)
2358 || ! CP_DECL_THREADPRIVATE_P (olddecl)
2359 || DECL_THREAD_LOCAL_P (newdecl)))
2361 /* Only variables can be thread-local, and all declarations must
2362 agree on this property. */
2363 if (DECL_THREAD_LOCAL_P (newdecl))
2364 return G_("thread-local declaration of %q#D follows "
2365 "non-thread-local declaration");
2367 return G_("non-thread-local declaration of %q#D follows "
2368 "thread-local declaration");
2370 else if (toplevel_bindings_p () || DECL_NAMESPACE_SCOPE_P (newdecl))
2372 /* The objects have been declared at namespace scope. If either
2373 is a member of an anonymous union, then this is an invalid
2374 redeclaration. For example:
2380 if ((TREE_CODE (newdecl) == VAR_DECL && DECL_ANON_UNION_VAR_P (newdecl))
2381 || (TREE_CODE (olddecl) == VAR_DECL && DECL_ANON_UNION_VAR_P (olddecl)))
2382 return G_("redeclaration of %q#D");
2383 /* If at least one declaration is a reference, there is no
2384 conflict. For example:
2390 if (DECL_EXTERNAL (newdecl) || DECL_EXTERNAL (olddecl))
2392 /* Reject two definitions. */
2393 return G_("redefinition of %q#D");
2397 /* Objects declared with block scope: */
2398 /* Reject two definitions, and reject a definition
2399 together with an external reference. */
2400 if (!(DECL_EXTERNAL (newdecl) && DECL_EXTERNAL (olddecl)))
2401 return G_("redeclaration of %q#D");
2406 /* Hash and equality functions for the named_label table. */
2409 named_label_entry_hash (const void *data)
2411 const struct named_label_entry *ent = (const struct named_label_entry *) data;
2412 return DECL_UID (ent->label_decl);
2416 named_label_entry_eq (const void *a, const void *b)
2418 const struct named_label_entry *ent_a = (const struct named_label_entry *) a;
2419 const struct named_label_entry *ent_b = (const struct named_label_entry *) b;
2420 return ent_a->label_decl == ent_b->label_decl;
2423 /* Create a new label, named ID. */
2426 make_label_decl (tree id, int local_p)
2428 struct named_label_entry *ent;
2432 decl = build_decl (input_location, LABEL_DECL, id, void_type_node);
2434 DECL_CONTEXT (decl) = current_function_decl;
2435 DECL_MODE (decl) = VOIDmode;
2436 C_DECLARED_LABEL_FLAG (decl) = local_p;
2438 /* Say where one reference is to the label, for the sake of the
2439 error if it is not defined. */
2440 DECL_SOURCE_LOCATION (decl) = input_location;
2442 /* Record the fact that this identifier is bound to this label. */
2443 SET_IDENTIFIER_LABEL_VALUE (id, decl);
2445 /* Create the label htab for the function on demand. */
2447 named_labels = htab_create_ggc (13, named_label_entry_hash,
2448 named_label_entry_eq, NULL);
2450 /* Record this label on the list of labels used in this function.
2451 We do this before calling make_label_decl so that we get the
2452 IDENTIFIER_LABEL_VALUE before the new label is declared. */
2453 ent = GGC_CNEW (struct named_label_entry);
2454 ent->label_decl = decl;
2456 slot = htab_find_slot (named_labels, ent, INSERT);
2457 gcc_assert (*slot == NULL);
2463 /* Look for a label named ID in the current function. If one cannot
2464 be found, create one. (We keep track of used, but undefined,
2465 labels, and complain about them at the end of a function.) */
2468 lookup_label (tree id)
2472 timevar_push (TV_NAME_LOOKUP);
2473 /* You can't use labels at global scope. */
2474 if (current_function_decl == NULL_TREE)
2476 error ("label %qE referenced outside of any function", id);
2477 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, NULL_TREE);
2480 /* See if we've already got this label. */
2481 decl = IDENTIFIER_LABEL_VALUE (id);
2482 if (decl != NULL_TREE && DECL_CONTEXT (decl) == current_function_decl)
2483 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2485 decl = make_label_decl (id, /*local_p=*/0);
2486 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2489 /* Declare a local label named ID. */
2492 declare_local_label (tree id)
2496 /* Add a new entry to the SHADOWED_LABELS list so that when we leave
2497 this scope we can restore the old value of IDENTIFIER_TYPE_VALUE. */
2498 shadow = tree_cons (IDENTIFIER_LABEL_VALUE (id), NULL_TREE,
2499 current_binding_level->shadowed_labels);
2500 current_binding_level->shadowed_labels = shadow;
2502 decl = make_label_decl (id, /*local_p=*/1);
2503 TREE_VALUE (shadow) = decl;
2508 /* Returns nonzero if it is ill-formed to jump past the declaration of
2509 DECL. Returns 2 if it's also a real problem. */
2512 decl_jump_unsafe (tree decl)
2514 /* [stmt.dcl]/3: A program that jumps from a point where a local variable
2515 with automatic storage duration is not in scope to a point where it is
2516 in scope is ill-formed unless the variable has scalar type, class type
2517 with a trivial default constructor and a trivial destructor, a
2518 cv-qualified version of one of these types, or an array of one of the
2519 preceding types and is declared without an initializer (8.5). */
2520 tree type = TREE_TYPE (decl);
2522 if (TREE_CODE (decl) != VAR_DECL || TREE_STATIC (decl)
2523 || type == error_mark_node)
2526 type = strip_array_types (type);
2528 if (type_has_nontrivial_default_init (TREE_TYPE (decl))
2529 || DECL_NONTRIVIALLY_INITIALIZED_P (decl))
2532 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
2538 /* A subroutine of check_previous_goto_1 to identify a branch to the user. */
2541 identify_goto (tree decl, const location_t *locus)
2544 permerror (input_location, "jump to label %qD", decl);
2546 permerror (input_location, "jump to case label");
2548 permerror (*locus, " from here");
2551 /* Check that a single previously seen jump to a newly defined label
2552 is OK. DECL is the LABEL_DECL or 0; LEVEL is the binding_level for
2553 the jump context; NAMES are the names in scope in LEVEL at the jump
2554 context; LOCUS is the source position of the jump or 0. Returns
2555 true if all is well. */
2558 check_previous_goto_1 (tree decl, struct cp_binding_level* level, tree names,
2559 bool exited_omp, const location_t *locus)
2561 struct cp_binding_level *b;
2562 bool identified = false, saw_eh = false, saw_omp = false;
2566 identify_goto (decl, locus);
2567 error (" exits OpenMP structured block");
2568 identified = saw_omp = true;
2571 for (b = current_binding_level; b ; b = b->level_chain)
2573 tree new_decls, old_decls = (b == level ? names : NULL_TREE);
2575 for (new_decls = b->names; new_decls != old_decls;
2576 new_decls = TREE_CHAIN (new_decls))
2578 int problem = decl_jump_unsafe (new_decls);
2584 identify_goto (decl, locus);
2588 error (" crosses initialization of %q+#D", new_decls);
2590 permerror (input_location, " enters scope of %q+#D which has "
2591 "non-trivial destructor", new_decls);
2596 if ((b->kind == sk_try || b->kind == sk_catch) && !saw_eh)
2600 identify_goto (decl, locus);
2603 if (b->kind == sk_try)
2604 error (" enters try block");
2606 error (" enters catch block");
2609 if (b->kind == sk_omp && !saw_omp)
2613 identify_goto (decl, locus);
2616 error (" enters OpenMP structured block");
2625 check_previous_goto (tree decl, struct named_label_use_entry *use)
2627 check_previous_goto_1 (decl, use->binding_level,
2628 use->names_in_scope, use->in_omp_scope,
2629 &use->o_goto_locus);
2633 check_switch_goto (struct cp_binding_level* level)
2635 return check_previous_goto_1 (NULL_TREE, level, level->names, false, NULL);
2638 /* Check that a new jump to a label DECL is OK. Called by
2639 finish_goto_stmt. */
2642 check_goto (tree decl)
2644 struct named_label_entry *ent, dummy;
2645 bool saw_catch = false, identified = false;
2648 /* We can't know where a computed goto is jumping.
2649 So we assume that it's OK. */
2650 if (TREE_CODE (decl) != LABEL_DECL)
2653 /* We didn't record any information about this label when we created it,
2654 and there's not much point since it's trivial to analyze as a return. */
2655 if (decl == cdtor_label)
2658 dummy.label_decl = decl;
2659 ent = (struct named_label_entry *) htab_find (named_labels, &dummy);
2660 gcc_assert (ent != NULL);
2662 /* If the label hasn't been defined yet, defer checking. */
2663 if (! DECL_INITIAL (decl))
2665 struct named_label_use_entry *new_use;
2667 /* Don't bother creating another use if the last goto had the
2668 same data, and will therefore create the same set of errors. */
2670 && ent->uses->names_in_scope == current_binding_level->names)
2673 new_use = GGC_NEW (struct named_label_use_entry);
2674 new_use->binding_level = current_binding_level;
2675 new_use->names_in_scope = current_binding_level->names;
2676 new_use->o_goto_locus = input_location;
2677 new_use->in_omp_scope = false;
2679 new_use->next = ent->uses;
2680 ent->uses = new_use;
2684 if (ent->in_try_scope || ent->in_catch_scope
2685 || ent->in_omp_scope || ent->bad_decls)
2687 permerror (input_location, "jump to label %q+D", decl);
2688 permerror (input_location, " from here");
2692 for (bad = ent->bad_decls; bad; bad = TREE_CHAIN (bad))
2694 tree b = TREE_VALUE (bad);
2695 int u = decl_jump_unsafe (b);
2697 if (u > 1 && DECL_ARTIFICIAL (b))
2699 /* Can't skip init of __exception_info. */
2700 error_at (DECL_SOURCE_LOCATION (b), " enters catch block");
2704 error (" skips initialization of %q+#D", b);
2706 permerror (input_location, " enters scope of %q+#D which has "
2707 "non-trivial destructor", b);
2710 if (ent->in_try_scope)
2711 error (" enters try block");
2712 else if (ent->in_catch_scope && !saw_catch)
2713 error (" enters catch block");
2715 if (ent->in_omp_scope)
2716 error (" enters OpenMP structured block");
2717 else if (flag_openmp)
2719 struct cp_binding_level *b;
2720 for (b = current_binding_level; b ; b = b->level_chain)
2722 if (b == ent->binding_level)
2724 if (b->kind == sk_omp)
2728 permerror (input_location, "jump to label %q+D", decl);
2729 permerror (input_location, " from here");
2732 error (" exits OpenMP structured block");
2739 /* Check that a return is ok wrt OpenMP structured blocks.
2740 Called by finish_return_stmt. Returns true if all is well. */
2743 check_omp_return (void)
2745 struct cp_binding_level *b;
2746 for (b = current_binding_level; b ; b = b->level_chain)
2747 if (b->kind == sk_omp)
2749 error ("invalid exit from OpenMP structured block");
2755 /* Define a label, specifying the location in the source file.
2756 Return the LABEL_DECL node for the label. */
2759 define_label (location_t location, tree name)
2761 struct named_label_entry *ent, dummy;
2762 struct cp_binding_level *p;
2765 timevar_push (TV_NAME_LOOKUP);
2767 decl = lookup_label (name);
2769 dummy.label_decl = decl;
2770 ent = (struct named_label_entry *) htab_find (named_labels, &dummy);
2771 gcc_assert (ent != NULL);
2773 /* After labels, make any new cleanups in the function go into their
2774 own new (temporary) binding contour. */
2775 for (p = current_binding_level;
2776 p->kind != sk_function_parms;
2778 p->more_cleanups_ok = 0;
2780 if (name == get_identifier ("wchar_t"))
2781 permerror (input_location, "label named wchar_t");
2783 if (DECL_INITIAL (decl) != NULL_TREE)
2785 error ("duplicate label %qD", decl);
2786 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
2790 struct named_label_use_entry *use;
2792 /* Mark label as having been defined. */
2793 DECL_INITIAL (decl) = error_mark_node;
2794 /* Say where in the source. */
2795 DECL_SOURCE_LOCATION (decl) = location;
2797 ent->binding_level = current_binding_level;
2798 ent->names_in_scope = current_binding_level->names;
2800 for (use = ent->uses; use ; use = use->next)
2801 check_previous_goto (decl, use);
2805 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2810 struct cp_binding_level *level;
2811 struct cp_switch *next;
2812 /* The SWITCH_STMT being built. */
2814 /* A splay-tree mapping the low element of a case range to the high
2815 element, or NULL_TREE if there is no high element. Used to
2816 determine whether or not a new case label duplicates an old case
2817 label. We need a tree, rather than simply a hash table, because
2818 of the GNU case range extension. */
2822 /* A stack of the currently active switch statements. The innermost
2823 switch statement is on the top of the stack. There is no need to
2824 mark the stack for garbage collection because it is only active
2825 during the processing of the body of a function, and we never
2826 collect at that point. */
2828 static struct cp_switch *switch_stack;
2830 /* Called right after a switch-statement condition is parsed.
2831 SWITCH_STMT is the switch statement being parsed. */
2834 push_switch (tree switch_stmt)
2836 struct cp_switch *p = XNEW (struct cp_switch);
2837 p->level = current_binding_level;
2838 p->next = switch_stack;
2839 p->switch_stmt = switch_stmt;
2840 p->cases = splay_tree_new (case_compare, NULL, NULL);
2847 struct cp_switch *cs = switch_stack;
2848 location_t switch_location;
2850 /* Emit warnings as needed. */
2851 if (EXPR_HAS_LOCATION (cs->switch_stmt))
2852 switch_location = EXPR_LOCATION (cs->switch_stmt);
2854 switch_location = input_location;
2855 if (!processing_template_decl)
2856 c_do_switch_warnings (cs->cases, switch_location,
2857 SWITCH_STMT_TYPE (cs->switch_stmt),
2858 SWITCH_STMT_COND (cs->switch_stmt));
2860 splay_tree_delete (cs->cases);
2861 switch_stack = switch_stack->next;
2865 /* Note that we've seen a definition of a case label, and complain if this
2866 is a bad place for one. */
2869 finish_case_label (location_t loc, tree low_value, tree high_value)
2872 struct cp_binding_level *p;
2874 if (processing_template_decl)
2878 /* For templates, just add the case label; we'll do semantic
2879 analysis at instantiation-time. */
2880 label = build_decl (loc, LABEL_DECL, NULL_TREE, NULL_TREE);
2881 return add_stmt (build_case_label (loc, low_value, high_value, label));
2884 /* Find the condition on which this switch statement depends. */
2885 cond = SWITCH_STMT_COND (switch_stack->switch_stmt);
2886 if (cond && TREE_CODE (cond) == TREE_LIST)
2887 cond = TREE_VALUE (cond);
2889 if (!check_switch_goto (switch_stack->level))
2890 return error_mark_node;
2892 r = c_add_case_label (loc, switch_stack->cases, cond,
2893 SWITCH_STMT_TYPE (switch_stack->switch_stmt),
2894 low_value, high_value);
2896 /* After labels, make any new cleanups in the function go into their
2897 own new (temporary) binding contour. */
2898 for (p = current_binding_level;
2899 p->kind != sk_function_parms;
2901 p->more_cleanups_ok = 0;
2906 /* Hash a TYPENAME_TYPE. K is really of type `tree'. */
2909 typename_hash (const void* k)
2912 const_tree const t = (const_tree) k;
2914 hash = (htab_hash_pointer (TYPE_CONTEXT (t))
2915 ^ htab_hash_pointer (DECL_NAME (TYPE_NAME (t))));
2920 typedef struct typename_info {
2928 /* Compare two TYPENAME_TYPEs. K1 is really of type `tree', K2 is
2929 really of type `typename_info*' */
2932 typename_compare (const void * k1, const void * k2)
2934 const_tree const t1 = (const_tree) k1;
2935 const typename_info *const t2 = (const typename_info *) k2;
2937 return (DECL_NAME (TYPE_NAME (t1)) == t2->name
2938 && TYPE_CONTEXT (t1) == t2->scope
2939 && TYPENAME_TYPE_FULLNAME (t1) == t2->template_id
2940 && TYPENAME_IS_ENUM_P (t1) == t2->enum_p
2941 && TYPENAME_IS_CLASS_P (t1) == t2->class_p);
2944 /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
2945 the type of `T', NAME is the IDENTIFIER_NODE for `t'.
2947 Returns the new TYPENAME_TYPE. */
2949 static GTY ((param_is (union tree_node))) htab_t typename_htab;
2952 build_typename_type (tree context, tree name, tree fullname,
2953 enum tag_types tag_type)
2961 if (typename_htab == NULL)
2962 typename_htab = htab_create_ggc (61, &typename_hash,
2963 &typename_compare, NULL);
2965 ti.scope = FROB_CONTEXT (context);
2967 ti.template_id = fullname;
2968 ti.enum_p = tag_type == enum_type;
2969 ti.class_p = (tag_type == class_type
2970 || tag_type == record_type
2971 || tag_type == union_type);
2972 hash = (htab_hash_pointer (ti.scope)
2973 ^ htab_hash_pointer (ti.name));
2975 /* See if we already have this type. */
2976 e = htab_find_slot_with_hash (typename_htab, &ti, hash, INSERT);
2981 /* Build the TYPENAME_TYPE. */
2982 t = cxx_make_type (TYPENAME_TYPE);
2983 TYPE_CONTEXT (t) = ti.scope;
2984 TYPENAME_TYPE_FULLNAME (t) = ti.template_id;
2985 TYPENAME_IS_ENUM_P (t) = ti.enum_p;
2986 TYPENAME_IS_CLASS_P (t) = ti.class_p;
2988 /* Build the corresponding TYPE_DECL. */
2989 d = build_decl (input_location, TYPE_DECL, name, t);
2990 TYPE_NAME (TREE_TYPE (d)) = d;
2991 TYPE_STUB_DECL (TREE_TYPE (d)) = d;
2992 DECL_CONTEXT (d) = FROB_CONTEXT (context);
2993 DECL_ARTIFICIAL (d) = 1;
2995 /* Store it in the hash table. */
2998 /* TYPENAME_TYPEs must always be compared structurally, because
2999 they may or may not resolve down to another type depending on
3000 the currently open classes. */
3001 SET_TYPE_STRUCTURAL_EQUALITY (t);
3007 /* Resolve `typename CONTEXT::NAME'. TAG_TYPE indicates the tag
3008 provided to name the type. Returns an appropriate type, unless an
3009 error occurs, in which case error_mark_node is returned. If we
3010 locate a non-artificial TYPE_DECL and TF_KEEP_TYPE_DECL is set, we
3011 return that, rather than the _TYPE it corresponds to, in other
3012 cases we look through the type decl. If TF_ERROR is set, complain
3013 about errors, otherwise be quiet. */
3016 make_typename_type (tree context, tree name, enum tag_types tag_type,
3017 tsubst_flags_t complain)
3023 if (name == error_mark_node
3024 || context == NULL_TREE
3025 || context == error_mark_node)
3026 return error_mark_node;
3030 if (!(TYPE_LANG_SPECIFIC (name)
3031 && (CLASSTYPE_IS_TEMPLATE (name)
3032 || CLASSTYPE_USE_TEMPLATE (name))))
3033 name = TYPE_IDENTIFIER (name);
3035 /* Create a TEMPLATE_ID_EXPR for the type. */
3036 name = build_nt (TEMPLATE_ID_EXPR,
3037 CLASSTYPE_TI_TEMPLATE (name),
3038 CLASSTYPE_TI_ARGS (name));
3040 else if (TREE_CODE (name) == TYPE_DECL)
3041 name = DECL_NAME (name);
3045 if (TREE_CODE (name) == TEMPLATE_ID_EXPR)
3047 name = TREE_OPERAND (name, 0);
3048 if (TREE_CODE (name) == TEMPLATE_DECL)
3049 name = TREE_OPERAND (fullname, 0) = DECL_NAME (name);
3050 else if (TREE_CODE (name) == OVERLOAD)
3052 error ("%qD is not a type", name);
3053 return error_mark_node;
3056 if (TREE_CODE (name) == TEMPLATE_DECL)
3058 error ("%qD used without template parameters", name);
3059 return error_mark_node;
3061 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
3062 gcc_assert (TYPE_P (context));
3064 if (!MAYBE_CLASS_TYPE_P (context))
3066 if (complain & tf_error)
3067 error ("%q#T is not a class", context);
3068 return error_mark_node;
3071 /* When the CONTEXT is a dependent type, NAME could refer to a
3072 dependent base class of CONTEXT. But look inside it anyway
3073 if CONTEXT is a currently open scope, in case it refers to a
3074 member of the current instantiation or a non-dependent base;
3075 lookup will stop when we hit a dependent base. */
3076 if (!dependent_scope_p (context))
3077 /* We should only set WANT_TYPE when we're a nested typename type.
3078 Then we can give better diagnostics if we find a non-type. */
3079 t = lookup_field (context, name, 2, /*want_type=*/true);
3083 if ((!t || TREE_CODE (t) == TREE_LIST) && dependent_type_p (context))
3084 return build_typename_type (context, name, fullname, tag_type);
3086 want_template = TREE_CODE (fullname) == TEMPLATE_ID_EXPR;
3090 if (complain & tf_error)
3091 error (want_template ? "no class template named %q#T in %q#T"
3092 : "no type named %q#T in %q#T", name, context);
3093 return error_mark_node;
3096 /* Pull out the template from an injected-class-name (or multiple). */
3098 t = maybe_get_template_decl_from_type_decl (t);
3100 if (TREE_CODE (t) == TREE_LIST)
3102 if (complain & tf_error)
3104 error ("lookup of %qT in %qT is ambiguous", name, context);
3105 print_candidates (t);
3107 return error_mark_node;
3110 if (want_template && !DECL_CLASS_TEMPLATE_P (t))
3112 if (complain & tf_error)
3113 error ("%<typename %T::%D%> names %q#T, which is not a class template",
3115 return error_mark_node;
3117 if (!want_template && TREE_CODE (t) != TYPE_DECL)
3119 if (complain & tf_error)
3120 error ("%<typename %T::%D%> names %q#T, which is not a type",
3122 return error_mark_node;
3125 if (complain & tf_error)
3126 perform_or_defer_access_check (TYPE_BINFO (context), t, t);
3128 /* If we are currently parsing a template and if T is a typedef accessed
3129 through CONTEXT then we need to remember and check access of T at
3130 template instantiation time. */
3131 add_typedef_to_current_template_for_access_check (t, context, input_location);
3134 return lookup_template_class (t, TREE_OPERAND (fullname, 1),
3136 /*entering_scope=*/0,
3137 tf_warning_or_error | tf_user);
3139 if (DECL_ARTIFICIAL (t) || !(complain & tf_keep_type_decl))
3145 /* Resolve `CONTEXT::template NAME'. Returns a TEMPLATE_DECL if the name
3146 can be resolved or an UNBOUND_CLASS_TEMPLATE, unless an error occurs,
3147 in which case error_mark_node is returned.
3149 If PARM_LIST is non-NULL, also make sure that the template parameter
3150 list of TEMPLATE_DECL matches.
3152 If COMPLAIN zero, don't complain about any errors that occur. */
3155 make_unbound_class_template (tree context, tree name, tree parm_list,
3156 tsubst_flags_t complain)
3162 name = TYPE_IDENTIFIER (name);
3163 else if (DECL_P (name))
3164 name = DECL_NAME (name);
3165 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
3167 if (!dependent_type_p (context)
3168 || currently_open_class (context))
3170 tree tmpl = NULL_TREE;
3172 if (MAYBE_CLASS_TYPE_P (context))
3173 tmpl = lookup_field (context, name, 0, false);
3175 if (!tmpl || !DECL_CLASS_TEMPLATE_P (tmpl))
3177 if (complain & tf_error)
3178 error ("no class template named %q#T in %q#T", name, context);
3179 return error_mark_node;
3183 && !comp_template_parms (DECL_TEMPLATE_PARMS (tmpl), parm_list))
3185 if (complain & tf_error)
3187 error ("template parameters do not match template");
3188 error ("%q+D declared here", tmpl);
3190 return error_mark_node;
3193 if (complain & tf_error)
3194 perform_or_defer_access_check (TYPE_BINFO (context), tmpl, tmpl);
3199 /* Build the UNBOUND_CLASS_TEMPLATE. */
3200 t = cxx_make_type (UNBOUND_CLASS_TEMPLATE);
3201 TYPE_CONTEXT (t) = FROB_CONTEXT (context);
3202 TREE_TYPE (t) = NULL_TREE;
3203 SET_TYPE_STRUCTURAL_EQUALITY (t);
3205 /* Build the corresponding TEMPLATE_DECL. */
3206 d = build_decl (input_location, TEMPLATE_DECL, name, t);
3207 TYPE_NAME (TREE_TYPE (d)) = d;
3208 TYPE_STUB_DECL (TREE_TYPE (d)) = d;
3209 DECL_CONTEXT (d) = FROB_CONTEXT (context);
3210 DECL_ARTIFICIAL (d) = 1;
3211 DECL_TEMPLATE_PARMS (d) = parm_list;
3218 /* Push the declarations of builtin types into the namespace.
3219 RID_INDEX is the index of the builtin type in the array
3220 RID_POINTERS. NAME is the name used when looking up the builtin
3221 type. TYPE is the _TYPE node for the builtin type. */
3224 record_builtin_type (enum rid rid_index,
3228 tree rname = NULL_TREE, tname = NULL_TREE;
3229 tree tdecl = NULL_TREE;
3231 if ((int) rid_index < (int) RID_MAX)
3232 rname = ridpointers[(int) rid_index];
3234 tname = get_identifier (name);
3236 /* The calls to SET_IDENTIFIER_GLOBAL_VALUE below should be
3237 eliminated. Built-in types should not be looked up name; their
3238 names are keywords that the parser can recognize. However, there
3239 is code in c-common.c that uses identifier_global_value to look
3240 up built-in types by name. */
3243 tdecl = build_decl (BUILTINS_LOCATION, TYPE_DECL, tname, type);
3244 DECL_ARTIFICIAL (tdecl) = 1;
3245 SET_IDENTIFIER_GLOBAL_VALUE (tname, tdecl);
3251 tdecl = build_decl (BUILTINS_LOCATION, TYPE_DECL, rname, type);
3252 DECL_ARTIFICIAL (tdecl) = 1;
3254 SET_IDENTIFIER_GLOBAL_VALUE (rname, tdecl);
3257 if (!TYPE_NAME (type))
3258 TYPE_NAME (type) = tdecl;
3261 debug_hooks->type_decl (tdecl, 0);
3264 /* Record one of the standard Java types.
3265 * Declare it as having the given NAME.
3266 * If SIZE > 0, it is the size of one of the integral types;
3267 * otherwise it is the negative of the size of one of the other types. */
3270 record_builtin_java_type (const char* name, int size)
3274 type = build_nonstandard_integer_type (size, 0);
3275 else if (size > -32)
3278 /* "__java_char" or ""__java_boolean". */
3279 type = build_nonstandard_integer_type (-size, 1);
3280 /* Get the signed type cached and attached to the unsigned type,
3281 so it doesn't get garbage-collected at "random" times,
3282 causing potential codegen differences out of different UIDs
3283 and different alias set numbers. */
3284 stype = build_nonstandard_integer_type (-size, 0);
3285 TREE_CHAIN (type) = stype;
3286 /*if (size == -1) TREE_SET_CODE (type, BOOLEAN_TYPE);*/
3289 { /* "__java_float" or ""__java_double". */
3290 type = make_node (REAL_TYPE);
3291 TYPE_PRECISION (type) = - size;
3294 record_builtin_type (RID_MAX, name, type);
3295 decl = TYPE_NAME (type);
3297 /* Suppress generate debug symbol entries for these types,
3298 since for normal C++ they are just clutter.
3299 However, push_lang_context undoes this if extern "Java" is seen. */
3300 DECL_IGNORED_P (decl) = 1;
3302 TYPE_FOR_JAVA (type) = 1;
3306 /* Push a type into the namespace so that the back ends ignore it. */
3309 record_unknown_type (tree type, const char* name)
3311 tree decl = pushdecl (build_decl (UNKNOWN_LOCATION,
3312 TYPE_DECL, get_identifier (name), type));
3313 /* Make sure the "unknown type" typedecl gets ignored for debug info. */
3314 DECL_IGNORED_P (decl) = 1;
3315 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
3316 TYPE_SIZE (type) = TYPE_SIZE (void_type_node);
3317 TYPE_ALIGN (type) = 1;
3318 TYPE_USER_ALIGN (type) = 0;
3319 SET_TYPE_MODE (type, TYPE_MODE (void_type_node));
3322 /* A string for which we should create an IDENTIFIER_NODE at
3325 typedef struct predefined_identifier
3327 /* The name of the identifier. */
3328 const char *const name;
3329 /* The place where the IDENTIFIER_NODE should be stored. */
3331 /* Nonzero if this is the name of a constructor or destructor. */
3332 const int ctor_or_dtor_p;
3333 } predefined_identifier;
3335 /* Create all the predefined identifiers. */
3338 initialize_predefined_identifiers (void)
3340 const predefined_identifier *pid;
3342 /* A table of identifiers to create at startup. */
3343 static const predefined_identifier predefined_identifiers[] = {
3344 { "C++", &lang_name_cplusplus, 0 },
3345 { "C", &lang_name_c, 0 },
3346 { "Java", &lang_name_java, 0 },
3347 /* Some of these names have a trailing space so that it is
3348 impossible for them to conflict with names written by users. */
3349 { "__ct ", &ctor_identifier, 1 },
3350 { "__base_ctor ", &base_ctor_identifier, 1 },
3351 { "__comp_ctor ", &complete_ctor_identifier, 1 },
3352 { "__dt ", &dtor_identifier, 1 },
3353 { "__comp_dtor ", &complete_dtor_identifier, 1 },
3354 { "__base_dtor ", &base_dtor_identifier, 1 },
3355 { "__deleting_dtor ", &deleting_dtor_identifier, 1 },
3356 { IN_CHARGE_NAME, &in_charge_identifier, 0 },
3357 { "nelts", &nelts_identifier, 0 },
3358 { THIS_NAME, &this_identifier, 0 },
3359 { VTABLE_DELTA_NAME, &delta_identifier, 0 },
3360 { VTABLE_PFN_NAME, &pfn_identifier, 0 },
3361 { "_vptr", &vptr_identifier, 0 },
3362 { "__vtt_parm", &vtt_parm_identifier, 0 },
3363 { "::", &global_scope_name, 0 },
3364 { "std", &std_identifier, 0 },
3368 for (pid = predefined_identifiers; pid->name; ++pid)
3370 *pid->node = get_identifier (pid->name);
3371 if (pid->ctor_or_dtor_p)
3372 IDENTIFIER_CTOR_OR_DTOR_P (*pid->node) = 1;
3376 /* Create the predefined scalar types of C,
3377 and some nodes representing standard constants (0, 1, (void *)0).
3378 Initialize the global binding level.
3379 Make definitions for built-in primitive functions. */
3382 cxx_init_decl_processing (void)
3385 tree void_ftype_ptr;
3387 build_common_tree_nodes (flag_signed_char);
3389 /* Create all the identifiers we need. */
3390 initialize_predefined_identifiers ();
3392 /* Create the global variables. */
3393 push_to_top_level ();
3395 current_function_decl = NULL_TREE;
3396 current_binding_level = NULL;
3397 /* Enter the global namespace. */
3398 gcc_assert (global_namespace == NULL_TREE);
3399 global_namespace = build_lang_decl (NAMESPACE_DECL, global_scope_name,
3401 TREE_PUBLIC (global_namespace) = 1;
3402 begin_scope (sk_namespace, global_namespace);
3404 current_lang_name = NULL_TREE;
3406 if (flag_visibility_ms_compat)
3407 default_visibility = VISIBILITY_HIDDEN;
3410 current_lang_name = lang_name_c;
3412 /* Create the `std' namespace. */
3413 push_namespace (std_identifier);
3414 std_node = current_namespace;
3417 c_common_nodes_and_builtins ();
3419 java_byte_type_node = record_builtin_java_type ("__java_byte", 8);
3420 java_short_type_node = record_builtin_java_type ("__java_short", 16);
3421 java_int_type_node = record_builtin_java_type ("__java_int", 32);
3422 java_long_type_node = record_builtin_java_type ("__java_long", 64);
3423 java_float_type_node = record_builtin_java_type ("__java_float", -32);
3424 java_double_type_node = record_builtin_java_type ("__java_double", -64);
3425 java_char_type_node = record_builtin_java_type ("__java_char", -16);
3426 java_boolean_type_node = record_builtin_java_type ("__java_boolean", -1);
3428 integer_two_node = build_int_cst (NULL_TREE, 2);
3429 integer_three_node = build_int_cst (NULL_TREE, 3);
3431 record_builtin_type (RID_BOOL, "bool", boolean_type_node);
3432 truthvalue_type_node = boolean_type_node;
3433 truthvalue_false_node = boolean_false_node;
3434 truthvalue_true_node = boolean_true_node;
3436 empty_except_spec = build_tree_list (NULL_TREE, NULL_TREE);
3439 record_builtin_type (RID_MAX, NULL, string_type_node);
3442 delta_type_node = ptrdiff_type_node;
3443 vtable_index_type = ptrdiff_type_node;
3445 vtt_parm_type = build_pointer_type (const_ptr_type_node);
3446 void_ftype = build_function_type (void_type_node, void_list_node);
3447 void_ftype_ptr = build_function_type (void_type_node,
3448 tree_cons (NULL_TREE,
3452 = build_exception_variant (void_ftype_ptr, empty_except_spec);
3454 /* C++ extensions */
3456 unknown_type_node = make_node (LANG_TYPE);
3457 record_unknown_type (unknown_type_node, "unknown type");
3459 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
3460 TREE_TYPE (unknown_type_node) = unknown_type_node;
3462 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
3464 TYPE_POINTER_TO (unknown_type_node) = unknown_type_node;
3465 TYPE_REFERENCE_TO (unknown_type_node) = unknown_type_node;
3467 init_list_type_node = make_node (LANG_TYPE);
3468 record_unknown_type (init_list_type_node, "init list");
3471 /* Make sure we get a unique function type, so we can give
3472 its pointer type a name. (This wins for gdb.) */
3473 tree vfunc_type = make_node (FUNCTION_TYPE);
3474 TREE_TYPE (vfunc_type) = integer_type_node;
3475 TYPE_ARG_TYPES (vfunc_type) = NULL_TREE;
3476 layout_type (vfunc_type);
3478 vtable_entry_type = build_pointer_type (vfunc_type);
3480 record_builtin_type (RID_MAX, VTBL_PTR_TYPE, vtable_entry_type);
3483 = build_cplus_array_type (vtable_entry_type, NULL_TREE);
3484 layout_type (vtbl_type_node);
3485 vtbl_type_node = cp_build_qualified_type (vtbl_type_node, TYPE_QUAL_CONST);
3486 record_builtin_type (RID_MAX, NULL, vtbl_type_node);
3487 vtbl_ptr_type_node = build_pointer_type (vtable_entry_type);
3488 layout_type (vtbl_ptr_type_node);
3489 record_builtin_type (RID_MAX, NULL, vtbl_ptr_type_node);
3491 push_namespace (get_identifier ("__cxxabiv1"));
3492 abi_node = current_namespace;
3495 global_type_node = make_node (LANG_TYPE);
3496 record_unknown_type (global_type_node, "global type");
3499 current_lang_name = lang_name_cplusplus;
3503 tree bad_alloc_type_node;
3504 tree bad_alloc_decl;
3505 tree newtype, deltype;
3506 tree ptr_ftype_sizetype;
3508 push_namespace (std_identifier);
3509 bad_alloc_id = get_identifier ("bad_alloc");
3510 bad_alloc_type_node = make_class_type (RECORD_TYPE);
3511 TYPE_CONTEXT (bad_alloc_type_node) = current_namespace;
3513 = create_implicit_typedef (bad_alloc_id, bad_alloc_type_node);
3514 DECL_CONTEXT (bad_alloc_decl) = current_namespace;
3518 = build_function_type (ptr_type_node,
3519 tree_cons (NULL_TREE,
3522 newtype = build_exception_variant
3523 (ptr_ftype_sizetype, add_exception_specifier
3524 (NULL_TREE, bad_alloc_type_node, -1));
3525 deltype = build_exception_variant (void_ftype_ptr, empty_except_spec);
3526 push_cp_library_fn (NEW_EXPR, newtype);
3527 push_cp_library_fn (VEC_NEW_EXPR, newtype);
3528 global_delete_fndecl = push_cp_library_fn (DELETE_EXPR, deltype);
3529 push_cp_library_fn (VEC_DELETE_EXPR, deltype);
3531 nullptr_type_node = make_node (LANG_TYPE);
3532 TYPE_SIZE (nullptr_type_node) = bitsize_int (GET_MODE_BITSIZE (ptr_mode));
3533 TYPE_SIZE_UNIT (nullptr_type_node) = size_int (GET_MODE_SIZE (ptr_mode));
3534 TYPE_UNSIGNED (nullptr_type_node) = 1;
3535 TYPE_PRECISION (nullptr_type_node) = GET_MODE_BITSIZE (ptr_mode);
3536 SET_TYPE_MODE (nullptr_type_node, Pmode);
3537 record_builtin_type (RID_MAX, "decltype(nullptr)", nullptr_type_node);
3538 nullptr_node = make_node (INTEGER_CST);
3539 TREE_TYPE (nullptr_node) = nullptr_type_node;
3543 = build_library_fn_ptr ("__cxa_pure_virtual", void_ftype);
3545 /* Perform other language dependent initializations. */
3546 init_class_processing ();
3547 init_rtti_processing ();
3548 init_template_processing ();
3550 if (flag_exceptions)
3551 init_exception_processing ();
3553 if (! supports_one_only ())
3556 make_fname_decl = cp_make_fname_decl;
3557 start_fname_decls ();
3559 /* Show we use EH for cleanups. */
3560 if (flag_exceptions)
3561 using_eh_for_cleanups ();
3564 /* Generate an initializer for a function naming variable from
3565 NAME. NAME may be NULL, to indicate a dependent name. TYPE_P is
3566 filled in with the type of the init. */
3569 cp_fname_init (const char* name, tree *type_p)
3571 tree domain = NULL_TREE;
3573 tree init = NULL_TREE;
3578 length = strlen (name);
3579 domain = build_index_type (size_int (length));
3580 init = build_string (length + 1, name);
3583 type = cp_build_qualified_type (char_type_node, TYPE_QUAL_CONST);
3584 type = build_cplus_array_type (type, domain);
3589 TREE_TYPE (init) = type;
3591 init = error_mark_node;
3596 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give
3597 the decl, LOC is the location to give the decl, NAME is the
3598 initialization string and TYPE_DEP indicates whether NAME depended
3599 on the type of the function. We make use of that to detect
3600 __PRETTY_FUNCTION__ inside a template fn. This is being done lazily
3601 at the point of first use, so we mustn't push the decl now. */
3604 cp_make_fname_decl (location_t loc, tree id, int type_dep)
3606 const char *const name = (type_dep && processing_template_decl
3607 ? NULL : fname_as_string (type_dep));
3609 tree init = cp_fname_init (name, &type);
3610 tree decl = build_decl (loc, VAR_DECL, id, type);
3613 free (CONST_CAST (char *, name));
3615 /* As we're using pushdecl_with_scope, we must set the context. */
3616 DECL_CONTEXT (decl) = current_function_decl;
3617 DECL_PRETTY_FUNCTION_P (decl) = type_dep;
3619 TREE_STATIC (decl) = 1;
3620 TREE_READONLY (decl) = 1;
3621 DECL_ARTIFICIAL (decl) = 1;
3623 TREE_USED (decl) = 1;
3625 if (current_function_decl)
3627 struct cp_binding_level *b = current_binding_level;
3628 while (b->level_chain->kind != sk_function_parms)
3630 pushdecl_with_scope (decl, b, /*is_friend=*/false);
3631 cp_finish_decl (decl, init, /*init_const_expr_p=*/false, NULL_TREE,
3632 LOOKUP_ONLYCONVERTING);
3635 pushdecl_top_level_and_finish (decl, init);
3641 builtin_function_1 (tree decl, tree context, bool is_global)
3643 tree id = DECL_NAME (decl);
3644 const char *name = IDENTIFIER_POINTER (id);
3646 retrofit_lang_decl (decl);
3648 DECL_ARTIFICIAL (decl) = 1;
3649 SET_OVERLOADED_OPERATOR_CODE (decl, ERROR_MARK);
3650 SET_DECL_LANGUAGE (decl, lang_c);
3651 /* Runtime library routines are, by definition, available in an
3652 external shared object. */
3653 DECL_VISIBILITY (decl) = VISIBILITY_DEFAULT;
3654 DECL_VISIBILITY_SPECIFIED (decl) = 1;
3656 DECL_CONTEXT (decl) = context;
3659 pushdecl_top_level (decl);
3663 /* A function in the user's namespace should have an explicit
3664 declaration before it is used. Mark the built-in function as
3665 anticipated but not actually declared. */
3666 if (name[0] != '_' || name[1] != '_')
3667 DECL_ANTICIPATED (decl) = 1;
3668 else if (strncmp (name + 2, "builtin_", strlen ("builtin_")) != 0)
3670 size_t len = strlen (name);
3672 /* Treat __*_chk fortification functions as anticipated as well,
3673 unless they are __builtin_*. */
3674 if (len > strlen ("___chk")
3675 && memcmp (name + len - strlen ("_chk"),
3676 "_chk", strlen ("_chk") + 1) == 0)
3677 DECL_ANTICIPATED (decl) = 1;
3684 cxx_builtin_function (tree decl)
3686 tree id = DECL_NAME (decl);
3687 const char *name = IDENTIFIER_POINTER (id);
3688 /* All builtins that don't begin with an '_' should additionally
3689 go in the 'std' namespace. */
3692 tree decl2 = copy_node(decl);
3693 push_namespace (std_identifier);
3694 builtin_function_1 (decl2, std_node, false);
3698 return builtin_function_1 (decl, NULL_TREE, false);
3701 /* Like cxx_builtin_function, but guarantee the function is added to the global
3702 scope. This is to allow function specific options to add new machine
3703 dependent builtins when the target ISA changes via attribute((target(...)))
3704 which saves space on program startup if the program does not use non-generic
3708 cxx_builtin_function_ext_scope (tree decl)
3711 tree id = DECL_NAME (decl);
3712 const char *name = IDENTIFIER_POINTER (id);
3713 /* All builtins that don't begin with an '_' should additionally
3714 go in the 'std' namespace. */
3717 tree decl2 = copy_node(decl);
3718 push_namespace (std_identifier);
3719 builtin_function_1 (decl2, std_node, true);
3723 return builtin_function_1 (decl, NULL_TREE, true);
3726 /* Generate a FUNCTION_DECL with the typical flags for a runtime library
3727 function. Not called directly. */
3730 build_library_fn_1 (tree name, enum tree_code operator_code, tree type)
3732 tree fn = build_lang_decl (FUNCTION_DECL, name, type);
3733 DECL_EXTERNAL (fn) = 1;
3734 TREE_PUBLIC (fn) = 1;
3735 DECL_ARTIFICIAL (fn) = 1;
3736 SET_OVERLOADED_OPERATOR_CODE (fn, operator_code);
3737 SET_DECL_LANGUAGE (fn, lang_c);
3738 /* Runtime library routines are, by definition, available in an
3739 external shared object. */
3740 DECL_VISIBILITY (fn) = VISIBILITY_DEFAULT;
3741 DECL_VISIBILITY_SPECIFIED (fn) = 1;
3745 /* Returns the _DECL for a library function with C linkage.
3746 We assume that such functions never throw; if this is incorrect,
3747 callers should unset TREE_NOTHROW. */
3750 build_library_fn (tree name, tree type)
3752 tree fn = build_library_fn_1 (name, ERROR_MARK, type);
3753 TREE_NOTHROW (fn) = 1;
3757 /* Returns the _DECL for a library function with C++ linkage. */
3760 build_cp_library_fn (tree name, enum tree_code operator_code, tree type)
3762 tree fn = build_library_fn_1 (name, operator_code, type);
3763 TREE_NOTHROW (fn) = TYPE_NOTHROW_P (type);
3764 DECL_CONTEXT (fn) = FROB_CONTEXT (current_namespace);
3765 SET_DECL_LANGUAGE (fn, lang_cplusplus);
3769 /* Like build_library_fn, but takes a C string instead of an
3773 build_library_fn_ptr (const char* name, tree type)
3775 return build_library_fn (get_identifier (name), type);
3778 /* Like build_cp_library_fn, but takes a C string instead of an
3782 build_cp_library_fn_ptr (const char* name, tree type)
3784 return build_cp_library_fn (get_identifier (name), ERROR_MARK, type);
3787 /* Like build_library_fn, but also pushes the function so that we will
3788 be able to find it via IDENTIFIER_GLOBAL_VALUE. Also, the function
3789 may throw exceptions listed in RAISES. */
3792 push_library_fn (tree name, tree type, tree raises)
3797 type = build_exception_variant (type, raises);
3799 fn = build_library_fn (name, type);
3800 pushdecl_top_level (fn);
3804 /* Like build_cp_library_fn, but also pushes the function so that it
3805 will be found by normal lookup. */
3808 push_cp_library_fn (enum tree_code operator_code, tree type)
3810 tree fn = build_cp_library_fn (ansi_opname (operator_code),
3817 /* Like push_library_fn, but takes a TREE_LIST of parm types rather than
3821 push_void_library_fn (tree name, tree parmtypes)
3823 tree type = build_function_type (void_type_node, parmtypes);
3824 return push_library_fn (name, type, NULL_TREE);
3827 /* Like push_library_fn, but also note that this function throws
3828 and does not return. Used for __throw_foo and the like. */
3831 push_throw_library_fn (tree name, tree type)
3833 tree fn = push_library_fn (name, type, NULL_TREE);
3834 TREE_THIS_VOLATILE (fn) = 1;
3835 TREE_NOTHROW (fn) = 0;
3839 /* When we call finish_struct for an anonymous union, we create
3840 default copy constructors and such. But, an anonymous union
3841 shouldn't have such things; this function undoes the damage to the
3842 anonymous union type T.
3844 (The reason that we create the synthesized methods is that we don't
3845 distinguish `union { int i; }' from `typedef union { int i; } U'.
3846 The first is an anonymous union; the second is just an ordinary
3850 fixup_anonymous_aggr (tree t)
3854 /* Wipe out memory of synthesized methods. */
3855 TYPE_HAS_USER_CONSTRUCTOR (t) = 0;
3856 TYPE_HAS_DEFAULT_CONSTRUCTOR (t) = 0;
3857 TYPE_HAS_INIT_REF (t) = 0;
3858 TYPE_HAS_CONST_INIT_REF (t) = 0;
3859 TYPE_HAS_ASSIGN_REF (t) = 0;
3860 TYPE_HAS_CONST_ASSIGN_REF (t) = 0;
3862 /* Splice the implicitly generated functions out of the TYPE_METHODS
3864 q = &TYPE_METHODS (t);
3867 if (DECL_ARTIFICIAL (*q))
3868 *q = TREE_CHAIN (*q);
3870 q = &TREE_CHAIN (*q);
3873 /* ISO C++ 9.5.3. Anonymous unions may not have function members. */
3874 if (TYPE_METHODS (t))
3876 tree decl = TYPE_MAIN_DECL (t);
3878 if (TREE_CODE (t) != UNION_TYPE)
3879 error_at (DECL_SOURCE_LOCATION (decl),
3880 "an anonymous struct cannot have function members");
3882 error_at (DECL_SOURCE_LOCATION (decl),
3883 "an anonymous union cannot have function members");
3886 /* Anonymous aggregates cannot have fields with ctors, dtors or complex
3887 assignment operators (because they cannot have these methods themselves).
3888 For anonymous unions this is already checked because they are not allowed
3889 in any union, otherwise we have to check it. */
3890 if (TREE_CODE (t) != UNION_TYPE)
3894 for (field = TYPE_FIELDS (t); field; field = TREE_CHAIN (field))
3895 if (TREE_CODE (field) == FIELD_DECL)
3897 type = TREE_TYPE (field);
3898 if (CLASS_TYPE_P (type))
3900 if (TYPE_NEEDS_CONSTRUCTING (type))
3901 error ("member %q+#D with constructor not allowed "
3902 "in anonymous aggregate", field);
3903 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
3904 error ("member %q+#D with destructor not allowed "
3905 "in anonymous aggregate", field);
3906 if (TYPE_HAS_COMPLEX_ASSIGN_REF (type))
3907 error ("member %q+#D with copy assignment operator "
3908 "not allowed in anonymous aggregate", field);
3914 /* Make sure that a declaration with no declarator is well-formed, i.e.
3915 just declares a tagged type or anonymous union.
3917 Returns the type declared; or NULL_TREE if none. */
3920 check_tag_decl (cp_decl_specifier_seq *declspecs)
3922 int saw_friend = declspecs->specs[(int)ds_friend] != 0;
3923 int saw_typedef = declspecs->specs[(int)ds_typedef] != 0;
3924 /* If a class, struct, or enum type is declared by the DECLSPECS
3925 (i.e, if a class-specifier, enum-specifier, or non-typename
3926 elaborated-type-specifier appears in the DECLSPECS),
3927 DECLARED_TYPE is set to the corresponding type. */
3928 tree declared_type = NULL_TREE;
3929 bool error_p = false;
3931 if (declspecs->multiple_types_p)
3932 error ("multiple types in one declaration");
3933 else if (declspecs->redefined_builtin_type)
3935 if (!in_system_header)
3936 permerror (input_location, "redeclaration of C++ built-in type %qT",
3937 declspecs->redefined_builtin_type);
3942 && TYPE_P (declspecs->type)
3943 && ((TREE_CODE (declspecs->type) != TYPENAME_TYPE
3944 && MAYBE_CLASS_TYPE_P (declspecs->type))
3945 || TREE_CODE (declspecs->type) == ENUMERAL_TYPE))
3946 declared_type = declspecs->type;
3947 else if (declspecs->type == error_mark_node)
3949 if (declared_type == NULL_TREE && ! saw_friend && !error_p)
3950 permerror (input_location, "declaration does not declare anything");
3951 /* Check for an anonymous union. */
3952 else if (declared_type && RECORD_OR_UNION_CODE_P (TREE_CODE (declared_type))
3953 && TYPE_ANONYMOUS_P (declared_type))
3955 /* 7/3 In a simple-declaration, the optional init-declarator-list
3956 can be omitted only when declaring a class (clause 9) or
3957 enumeration (7.2), that is, when the decl-specifier-seq contains
3958 either a class-specifier, an elaborated-type-specifier with
3959 a class-key (9.1), or an enum-specifier. In these cases and
3960 whenever a class-specifier or enum-specifier is present in the
3961 decl-specifier-seq, the identifiers in these specifiers are among
3962 the names being declared by the declaration (as class-name,
3963 enum-names, or enumerators, depending on the syntax). In such
3964 cases, and except for the declaration of an unnamed bit-field (9.6),
3965 the decl-specifier-seq shall introduce one or more names into the
3966 program, or shall redeclare a name introduced by a previous
3967 declaration. [Example:
3968 enum { }; // ill-formed
3969 typedef class { }; // ill-formed
3973 error ("missing type-name in typedef-declaration");
3976 /* Anonymous unions are objects, so they can have specifiers. */;
3977 SET_ANON_AGGR_TYPE_P (declared_type);
3979 if (TREE_CODE (declared_type) != UNION_TYPE && !in_system_header)
3980 pedwarn (input_location, OPT_pedantic, "ISO C++ prohibits anonymous structs");
3985 if (declspecs->specs[(int)ds_inline]
3986 || declspecs->specs[(int)ds_virtual])
3987 error ("%qs can only be specified for functions",
3988 declspecs->specs[(int)ds_inline]
3989 ? "inline" : "virtual");
3991 && (!current_class_type
3992 || current_scope () != current_class_type))
3993 error ("%<friend%> can only be specified inside a class");
3994 else if (declspecs->specs[(int)ds_explicit])
3995 error ("%<explicit%> can only be specified for constructors");
3996 else if (declspecs->storage_class)
3997 error ("a storage class can only be specified for objects "
3999 else if (declspecs->specs[(int)ds_const]
4000 || declspecs->specs[(int)ds_volatile]
4001 || declspecs->specs[(int)ds_restrict]
4002 || declspecs->specs[(int)ds_thread])
4003 error ("qualifiers can only be specified for objects "
4005 else if (saw_typedef)
4006 warning (0, "%<typedef%> was ignored in this declaration");
4007 else if (declspecs->specs[(int) ds_constexpr])
4008 error ("%<constexpr> cannot be used for type declarations");
4011 return declared_type;
4014 /* Called when a declaration is seen that contains no names to declare.
4015 If its type is a reference to a structure, union or enum inherited
4016 from a containing scope, shadow that tag name for the current scope
4017 with a forward reference.
4018 If its type defines a new named structure or union
4019 or defines an enum, it is valid but we need not do anything here.
4020 Otherwise, it is an error.
4022 C++: may have to grok the declspecs to learn about static,
4023 complain for anonymous unions.
4025 Returns the TYPE declared -- or NULL_TREE if none. */
4028 shadow_tag (cp_decl_specifier_seq *declspecs)
4030 tree t = check_tag_decl (declspecs);
4035 if (declspecs->attributes)
4037 warning (0, "attribute ignored in declaration of %q+#T", t);
4038 warning (0, "attribute for %q+#T must follow the %qs keyword",
4039 t, class_key_or_enum_as_string (t));
4043 if (maybe_process_partial_specialization (t) == error_mark_node)
4046 /* This is where the variables in an anonymous union are
4047 declared. An anonymous union declaration looks like:
4049 because there is no declarator after the union, the parser
4050 sends that declaration here. */
4051 if (ANON_AGGR_TYPE_P (t))
4053 fixup_anonymous_aggr (t);
4055 if (TYPE_FIELDS (t))
4057 tree decl = grokdeclarator (/*declarator=*/NULL,
4058 declspecs, NORMAL, 0, NULL);
4059 finish_anon_union (decl);
4066 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
4069 groktypename (cp_decl_specifier_seq *type_specifiers,
4070 const cp_declarator *declarator,
4071 bool is_template_arg)
4075 enum decl_context context
4076 = is_template_arg ? TEMPLATE_TYPE_ARG : TYPENAME;
4077 attrs = type_specifiers->attributes;
4078 type_specifiers->attributes = NULL_TREE;
4079 type = grokdeclarator (declarator, type_specifiers, context, 0, &attrs);
4080 if (attrs && type != error_mark_node)
4082 if (CLASS_TYPE_P (type))
4083 warning (OPT_Wattributes, "ignoring attributes applied to class type %qT "
4084 "outside of definition", type);
4085 else if (MAYBE_CLASS_TYPE_P (type))
4086 /* A template type parameter or other dependent type. */
4087 warning (OPT_Wattributes, "ignoring attributes applied to dependent "
4088 "type %qT without an associated declaration", type);
4090 cplus_decl_attributes (&type, attrs, 0);
4095 /* Process a DECLARATOR for a function-scope variable declaration,
4096 namespace-scope variable declaration, or function declaration.
4097 (Function definitions go through start_function; class member
4098 declarations appearing in the body of the class go through
4099 grokfield.) The DECL corresponding to the DECLARATOR is returned.
4100 If an error occurs, the error_mark_node is returned instead.
4102 DECLSPECS are the decl-specifiers for the declaration. INITIALIZED is
4103 SD_INITIALIZED if an explicit initializer is present, or SD_DEFAULTED
4104 for an explicitly defaulted function, or SD_DELETED for an explicitly
4105 deleted function, but 0 (SD_UNINITIALIZED) if this is a variable
4106 implicitly initialized via a default constructor. ATTRIBUTES and
4107 PREFIX_ATTRIBUTES are GNU attributes associated with this declaration.
4108 *PUSHED_SCOPE_P is set to the scope entered in this function, if any; if
4109 set, the caller is responsible for calling pop_scope. */
4112 start_decl (const cp_declarator *declarator,
4113 cp_decl_specifier_seq *declspecs,
4116 tree prefix_attributes,
4117 tree *pushed_scope_p)
4124 *pushed_scope_p = NULL_TREE;
4126 /* An object declared as __attribute__((deprecated)) suppresses
4127 warnings of uses of other deprecated items. */
4128 if (lookup_attribute ("deprecated", attributes))
4129 deprecated_state = DEPRECATED_SUPPRESS;
4131 attributes = chainon (attributes, prefix_attributes);
4133 decl = grokdeclarator (declarator, declspecs, NORMAL, initialized,
4136 deprecated_state = DEPRECATED_NORMAL;
4138 if (decl == NULL_TREE || TREE_CODE (decl) == VOID_TYPE
4139 || decl == error_mark_node)
4140 return error_mark_node;
4142 context = DECL_CONTEXT (decl);
4146 *pushed_scope_p = push_scope (context);
4148 /* We are only interested in class contexts, later. */
4149 if (TREE_CODE (context) == NAMESPACE_DECL)
4150 context = NULL_TREE;
4154 /* Is it valid for this decl to have an initializer at all?
4155 If not, set INITIALIZED to zero, which will indirectly
4156 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
4157 switch (TREE_CODE (decl))
4160 error ("typedef %qD is initialized (use decltype instead)", decl);
4161 return error_mark_node;
4164 if (initialized == SD_DELETED)
4165 /* We'll handle the rest of the semantics later, but we need to
4166 set this now so it's visible to duplicate_decls. */
4167 DECL_DELETED_FN (decl) = 1;
4176 if (! toplevel_bindings_p ()
4177 && DECL_EXTERNAL (decl))
4178 warning (0, "declaration of %q#D has %<extern%> and is initialized",
4180 DECL_EXTERNAL (decl) = 0;
4181 if (toplevel_bindings_p ())
4182 TREE_STATIC (decl) = 1;
4185 /* If this is a typedef that names the class for linkage purposes
4186 (7.1.3p8), apply any attributes directly to the type. */
4187 if (TREE_CODE (decl) == TYPE_DECL
4188 && TAGGED_TYPE_P (TREE_TYPE (decl))
4189 && decl == TYPE_NAME (TYPE_MAIN_VARIANT (TREE_TYPE (decl))))
4190 flags = ATTR_FLAG_TYPE_IN_PLACE;
4194 /* Set attributes here so if duplicate decl, will have proper attributes. */
4195 cplus_decl_attributes (&decl, attributes, flags);
4197 /* Dllimported symbols cannot be defined. Static data members (which
4198 can be initialized in-class and dllimported) go through grokfield,
4199 not here, so we don't need to exclude those decls when checking for
4201 if (initialized && DECL_DLLIMPORT_P (decl))
4203 error ("definition of %q#D is marked %<dllimport%>", decl);
4204 DECL_DLLIMPORT_P (decl) = 0;
4207 /* If #pragma weak was used, mark the decl weak now. */
4208 maybe_apply_pragma_weak (decl);
4210 if (TREE_CODE (decl) == FUNCTION_DECL
4211 && DECL_DECLARED_INLINE_P (decl)
4212 && DECL_UNINLINABLE (decl)
4213 && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl)))
4214 warning (0, "inline function %q+D given attribute noinline", decl);
4216 if (context && COMPLETE_TYPE_P (complete_type (context)))
4218 if (TREE_CODE (decl) == VAR_DECL)
4220 tree field = lookup_field (context, DECL_NAME (decl), 0, false);
4221 if (field == NULL_TREE || TREE_CODE (field) != VAR_DECL)
4222 error ("%q#D is not a static member of %q#T", decl, context);
4225 if (DECL_CONTEXT (field) != context)
4227 if (!same_type_p (DECL_CONTEXT (field), context))
4228 permerror (input_location, "ISO C++ does not permit %<%T::%D%> "
4229 "to be defined as %<%T::%D%>",
4230 DECL_CONTEXT (field), DECL_NAME (decl),
4231 context, DECL_NAME (decl));
4232 DECL_CONTEXT (decl) = DECL_CONTEXT (field);
4234 if (processing_specialization
4235 && template_class_depth (context) == 0
4236 && CLASSTYPE_TEMPLATE_SPECIALIZATION (context))
4237 error ("template header not allowed in member definition "
4238 "of explicitly specialized class");
4239 /* Static data member are tricky; an in-class initialization
4240 still doesn't provide a definition, so the in-class
4241 declaration will have DECL_EXTERNAL set, but will have an
4242 initialization. Thus, duplicate_decls won't warn
4243 about this situation, and so we check here. */
4244 if (initialized && DECL_INITIALIZED_IN_CLASS_P (field))
4245 error ("duplicate initialization of %qD", decl);
4246 if (duplicate_decls (decl, field, /*newdecl_is_friend=*/false))
4248 if (declspecs->specs[(int) ds_constexpr]
4249 && !DECL_DECLARED_CONSTEXPR_P (field))
4250 error ("%qD declared %<constexpr%> outside its class", field);
4255 tree field = check_classfn (context, decl,
4256 (processing_template_decl
4257 > template_class_depth (context))
4258 ? current_template_parms
4260 if (field && field != error_mark_node
4261 && duplicate_decls (decl, field,
4262 /*newdecl_is_friend=*/false))
4266 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
4267 DECL_IN_AGGR_P (decl) = 0;
4268 /* Do not mark DECL as an explicit specialization if it was not
4269 already marked as an instantiation; a declaration should
4270 never be marked as a specialization unless we know what
4271 template is being specialized. */
4272 if (DECL_LANG_SPECIFIC (decl) && DECL_USE_TEMPLATE (decl))
4274 SET_DECL_TEMPLATE_SPECIALIZATION (decl);
4276 /* [temp.expl.spec] An explicit specialization of a static data
4277 member of a template is a definition if the declaration
4278 includes an initializer; otherwise, it is a declaration.
4280 We check for processing_specialization so this only applies
4281 to the new specialization syntax. */
4282 if (!initialized && processing_specialization)
4283 DECL_EXTERNAL (decl) = 1;
4286 if (DECL_EXTERNAL (decl) && ! DECL_TEMPLATE_SPECIALIZATION (decl))
4287 permerror (input_location, "declaration of %q#D outside of class is not definition",
4290 if (!ensure_literal_type_for_constexpr_object (decl))
4291 return error_mark_node;
4294 was_public = TREE_PUBLIC (decl);
4296 /* Enter this declaration into the symbol table. */
4297 decl = maybe_push_decl (decl);
4299 if (processing_template_decl)
4300 decl = push_template_decl (decl);
4301 if (decl == error_mark_node)
4302 return error_mark_node;
4304 /* Tell the back end to use or not use .common as appropriate. If we say
4305 -fconserve-space, we want this to save .data space, at the expense of
4306 wrong semantics. If we say -fno-conserve-space, we want this to
4307 produce errors about redefs; to do this we force variables into the
4309 if (flag_conserve_space
4310 && TREE_CODE (decl) == VAR_DECL
4311 && TREE_PUBLIC (decl)
4312 && !DECL_THREAD_LOCAL_P (decl)
4313 && !have_global_bss_p ())
4314 DECL_COMMON (decl) = 1;
4316 if (TREE_CODE (decl) == VAR_DECL
4317 && DECL_NAMESPACE_SCOPE_P (decl) && !TREE_PUBLIC (decl) && !was_public
4318 && !DECL_THIS_STATIC (decl) && !DECL_ARTIFICIAL (decl))
4320 /* This is a const variable with implicit 'static'. Set
4321 DECL_THIS_STATIC so we can tell it from variables that are
4322 !TREE_PUBLIC because of the anonymous namespace. */
4323 gcc_assert (CP_TYPE_CONST_P (TREE_TYPE (decl)));
4324 DECL_THIS_STATIC (decl) = 1;
4327 if (!processing_template_decl && TREE_CODE (decl) == VAR_DECL)
4328 start_decl_1 (decl, initialized);
4333 /* Process the declaration of a variable DECL. INITIALIZED is true
4334 iff DECL is explicitly initialized. (INITIALIZED is false if the
4335 variable is initialized via an implicitly-called constructor.)
4336 This function must be called for ordinary variables (including, for
4337 example, implicit instantiations of templates), but must not be
4338 called for template declarations. */
4341 start_decl_1 (tree decl, bool initialized)
4345 bool aggregate_definition_p;
4347 gcc_assert (!processing_template_decl);
4349 if (error_operand_p (decl))
4352 gcc_assert (TREE_CODE (decl) == VAR_DECL);
4354 type = TREE_TYPE (decl);
4355 complete_p = COMPLETE_TYPE_P (type);
4356 aggregate_definition_p = MAYBE_CLASS_TYPE_P (type) && !DECL_EXTERNAL (decl);
4358 /* If an explicit initializer is present, or if this is a definition
4359 of an aggregate, then we need a complete type at this point.
4360 (Scalars are always complete types, so there is nothing to
4361 check.) This code just sets COMPLETE_P; errors (if necessary)
4362 are issued below. */
4363 if ((initialized || aggregate_definition_p)
4365 && COMPLETE_TYPE_P (complete_type (type)))
4368 /* We will not yet have set TREE_READONLY on DECL if the type
4369 was "const", but incomplete, before this point. But, now, we
4370 have a complete type, so we can try again. */
4371 cp_apply_type_quals_to_decl (cp_type_quals (type), decl);
4375 /* Is it valid for this decl to have an initializer at all? */
4377 /* Don't allow initializations for incomplete types except for
4378 arrays which might be completed by the initialization. */
4380 ; /* A complete type is ok. */
4381 else if (type_uses_auto (type))
4382 ; /* An auto type is ok. */
4383 else if (TREE_CODE (type) != ARRAY_TYPE)
4385 error ("variable %q#D has initializer but incomplete type", decl);
4386 type = TREE_TYPE (decl) = error_mark_node;
4388 else if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (type))))
4390 if (DECL_LANG_SPECIFIC (decl) && DECL_TEMPLATE_INFO (decl))
4391 error ("elements of array %q#D have incomplete type", decl);
4392 /* else we already gave an error in start_decl. */
4395 else if (aggregate_definition_p && !complete_p)
4397 if (type_uses_auto (type))
4398 error ("declaration of %q#D has no initializer", decl);
4400 error ("aggregate %q#D has incomplete type and cannot be defined",
4402 /* Change the type so that assemble_variable will give
4403 DECL an rtl we can live with: (mem (const_int 0)). */
4404 type = TREE_TYPE (decl) = error_mark_node;
4407 /* Create a new scope to hold this declaration if necessary.
4408 Whether or not a new scope is necessary cannot be determined
4409 until after the type has been completed; if the type is a
4410 specialization of a class template it is not until after
4411 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
4412 will be set correctly. */
4413 maybe_push_cleanup_level (type);
4416 /* Handle initialization of references. DECL, TYPE, and INIT have the
4417 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
4418 but will be set to a new CLEANUP_STMT if a temporary is created
4419 that must be destroyed subsequently.
4421 Returns an initializer expression to use to initialize DECL, or
4422 NULL if the initialization can be performed statically.
4424 Quotes on semantics can be found in ARM 8.4.3. */
4427 grok_reference_init (tree decl, tree type, tree init, tree *cleanup)
4431 if (init == NULL_TREE)
4433 if ((DECL_LANG_SPECIFIC (decl) == 0
4434 || DECL_IN_AGGR_P (decl) == 0)
4435 && ! DECL_THIS_EXTERN (decl))
4436 error ("%qD declared as reference but not initialized", decl);
4440 if (TREE_CODE (init) == TREE_LIST)
4441 init = build_x_compound_expr_from_list (init, "initializer");
4443 if (TREE_CODE (TREE_TYPE (type)) != ARRAY_TYPE
4444 && TREE_CODE (TREE_TYPE (init)) == ARRAY_TYPE)
4445 /* Note: default conversion is only called in very special cases. */
4446 init = decay_conversion (init);
4448 /* Convert INIT to the reference type TYPE. This may involve the
4449 creation of a temporary, whose lifetime must be the same as that
4450 of the reference. If so, a DECL_EXPR for the temporary will be
4451 added just after the DECL_EXPR for DECL. That's why we don't set
4452 DECL_INITIAL for local references (instead assigning to them
4453 explicitly); we need to allow the temporary to be initialized
4455 tmp = initialize_reference (type, init, decl, cleanup, tf_warning_or_error);
4457 if (tmp == error_mark_node)
4459 else if (tmp == NULL_TREE)
4461 error ("cannot initialize %qT from %qT", type, TREE_TYPE (init));
4465 if (TREE_STATIC (decl) && !TREE_CONSTANT (tmp))
4468 DECL_INITIAL (decl) = tmp;
4473 /* Subroutine of check_initializer. We're initializing a DECL of
4474 std::initializer_list<T> TYPE from a braced-init-list INIT, and need to
4475 extend the lifetime of the underlying array to match that of the decl,
4476 just like for reference initialization. CLEANUP is as for
4477 grok_reference_init. */
4480 build_init_list_var_init (tree decl, tree type, tree init, tree *cleanup)
4482 tree aggr_init, array, arrtype;
4483 init = perform_implicit_conversion (type, init, tf_warning_or_error);
4484 if (error_operand_p (init))
4485 return error_mark_node;
4487 aggr_init = TARGET_EXPR_INITIAL (init);
4488 init = build2 (INIT_EXPR, type, decl, init);
4490 array = AGGR_INIT_EXPR_ARG (aggr_init, 1);
4491 arrtype = TREE_TYPE (array);
4493 gcc_assert (TREE_CODE (array) == ADDR_EXPR);
4494 array = TREE_OPERAND (array, 0);
4495 /* If the array is constant, finish_compound_literal already made it a
4496 static variable and we don't need to do anything here. */
4497 if (decl && TREE_CODE (array) == TARGET_EXPR)
4500 tree var = set_up_extended_ref_temp (decl, array, cleanup, &subinit);
4501 var = build_address (var);
4502 var = convert (arrtype, var);
4503 AGGR_INIT_EXPR_ARG (aggr_init, 1) = var;
4504 init = build2 (COMPOUND_EXPR, TREE_TYPE (init), subinit, init);
4509 /* Designated initializers in arrays are not supported in GNU C++.
4510 The parser cannot detect this error since it does not know whether
4511 a given brace-enclosed initializer is for a class type or for an
4512 array. This function checks that CE does not use a designated
4513 initializer. If it does, an error is issued. Returns true if CE
4514 is valid, i.e., does not have a designated initializer. */
4517 check_array_designated_initializer (const constructor_elt *ce)
4519 /* Designated initializers for array elements are not supported. */
4522 /* The parser only allows identifiers as designated
4524 if (ce->index == error_mark_node)
4525 error ("name used in a GNU-style designated "
4526 "initializer for an array");
4529 gcc_assert (TREE_CODE (ce->index) == IDENTIFIER_NODE);
4530 error ("name %qD used in a GNU-style designated "
4531 "initializer for an array", ce->index);
4539 /* When parsing `int a[] = {1, 2};' we don't know the size of the
4540 array until we finish parsing the initializer. If that's the
4541 situation we're in, update DECL accordingly. */
4544 maybe_deduce_size_from_array_init (tree decl, tree init)
4546 tree type = TREE_TYPE (decl);
4548 if (TREE_CODE (type) == ARRAY_TYPE
4549 && TYPE_DOMAIN (type) == NULL_TREE
4550 && TREE_CODE (decl) != TYPE_DECL)
4552 /* do_default is really a C-ism to deal with tentative definitions.
4553 But let's leave it here to ease the eventual merge. */
4554 int do_default = !DECL_EXTERNAL (decl);
4555 tree initializer = init ? init : DECL_INITIAL (decl);
4558 /* Check that there are no designated initializers in INIT, as
4559 those are not supported in GNU C++, and as the middle-end
4560 will crash if presented with a non-numeric designated
4562 if (initializer && TREE_CODE (initializer) == CONSTRUCTOR)
4564 VEC(constructor_elt,gc) *v = CONSTRUCTOR_ELTS (initializer);
4565 constructor_elt *ce;
4568 VEC_iterate (constructor_elt, v, i, ce);
4570 if (!check_array_designated_initializer (ce))
4576 failure = cp_complete_array_type (&TREE_TYPE (decl), initializer,
4580 error ("initializer fails to determine size of %qD", decl);
4581 TREE_TYPE (decl) = error_mark_node;
4583 else if (failure == 2)
4587 error ("array size missing in %qD", decl);
4588 TREE_TYPE (decl) = error_mark_node;
4590 /* If a `static' var's size isn't known, make it extern as
4591 well as static, so it does not get allocated. If it's not
4592 `static', then don't mark it extern; finish_incomplete_decl
4593 will give it a default size and it will get allocated. */
4594 else if (!pedantic && TREE_STATIC (decl) && !TREE_PUBLIC (decl))
4595 DECL_EXTERNAL (decl) = 1;
4597 else if (failure == 3)
4599 error ("zero-size array %qD", decl);
4600 TREE_TYPE (decl) = error_mark_node;
4604 cp_apply_type_quals_to_decl (cp_type_quals (TREE_TYPE (decl)), decl);
4606 relayout_decl (decl);
4610 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
4611 any appropriate error messages regarding the layout. */
4614 layout_var_decl (tree decl)
4618 type = TREE_TYPE (decl);
4619 if (type == error_mark_node)
4622 /* If we haven't already layed out this declaration, do so now.
4623 Note that we must not call complete type for an external object
4624 because it's type might involve templates that we are not
4625 supposed to instantiate yet. (And it's perfectly valid to say
4626 `extern X x' for some incomplete type `X'.) */
4627 if (!DECL_EXTERNAL (decl))
4628 complete_type (type);
4629 if (!DECL_SIZE (decl)
4630 && TREE_TYPE (decl) != error_mark_node
4631 && (COMPLETE_TYPE_P (type)
4632 || (TREE_CODE (type) == ARRAY_TYPE
4633 && !TYPE_DOMAIN (type)
4634 && COMPLETE_TYPE_P (TREE_TYPE (type)))))
4635 layout_decl (decl, 0);
4637 if (!DECL_EXTERNAL (decl) && DECL_SIZE (decl) == NULL_TREE)
4639 /* An automatic variable with an incomplete type: that is an error.
4640 Don't talk about array types here, since we took care of that
4641 message in grokdeclarator. */
4642 error ("storage size of %qD isn't known", decl);
4643 TREE_TYPE (decl) = error_mark_node;
4646 /* Keep this code around in case we later want to control debug info
4647 based on whether a type is "used". (jason 1999-11-11) */
4649 else if (!DECL_EXTERNAL (decl) && MAYBE_CLASS_TYPE_P (ttype))
4650 /* Let debugger know it should output info for this type. */
4651 note_debug_info_needed (ttype);
4653 if (TREE_STATIC (decl) && DECL_CLASS_SCOPE_P (decl))
4654 note_debug_info_needed (DECL_CONTEXT (decl));
4657 if ((DECL_EXTERNAL (decl) || TREE_STATIC (decl))
4658 && DECL_SIZE (decl) != NULL_TREE
4659 && ! TREE_CONSTANT (DECL_SIZE (decl)))
4661 if (TREE_CODE (DECL_SIZE (decl)) == INTEGER_CST)
4662 constant_expression_warning (DECL_SIZE (decl));
4665 error ("storage size of %qD isn't constant", decl);
4666 TREE_TYPE (decl) = error_mark_node;
4671 /* If a local static variable is declared in an inline function, or if
4672 we have a weak definition, we must endeavor to create only one
4673 instance of the variable at link-time. */
4676 maybe_commonize_var (tree decl)
4678 /* Static data in a function with comdat linkage also has comdat
4680 if (TREE_STATIC (decl)
4681 /* Don't mess with __FUNCTION__. */
4682 && ! DECL_ARTIFICIAL (decl)
4683 && DECL_FUNCTION_SCOPE_P (decl)
4684 && vague_linkage_p (DECL_CONTEXT (decl)))
4688 /* With weak symbols, we simply make the variable COMDAT;
4689 that will cause copies in multiple translations units to
4691 comdat_linkage (decl);
4695 if (DECL_INITIAL (decl) == NULL_TREE
4696 || DECL_INITIAL (decl) == error_mark_node)
4698 /* Without weak symbols, we can use COMMON to merge
4699 uninitialized variables. */
4700 TREE_PUBLIC (decl) = 1;
4701 DECL_COMMON (decl) = 1;
4705 /* While for initialized variables, we must use internal
4706 linkage -- which means that multiple copies will not
4708 TREE_PUBLIC (decl) = 0;
4709 DECL_COMMON (decl) = 0;
4710 warning_at (input_location, 0,
4711 "sorry: semantics of inline function static "
4712 "data %q+#D are wrong (you'll wind up "
4713 "with multiple copies)", decl);
4714 warning_at (DECL_SOURCE_LOCATION (decl), 0,
4715 " you can work around this by removing "
4720 else if (DECL_LANG_SPECIFIC (decl) && DECL_COMDAT (decl))
4721 /* Set it up again; we might have set DECL_INITIAL since the last
4723 comdat_linkage (decl);
4726 /* Issue an error message if DECL is an uninitialized const variable. */
4729 check_for_uninitialized_const_var (tree decl)
4731 tree type = strip_array_types (TREE_TYPE (decl));
4733 if (TREE_CODE (decl) == VAR_DECL && DECL_DECLARED_CONSTEXPR_P (decl)
4734 && DECL_INITIAL (decl) == NULL)
4735 error ("missing initializer for constexpr %qD", decl);
4737 /* ``Unless explicitly declared extern, a const object does not have
4738 external linkage and must be initialized. ($8.4; $12.1)'' ARM
4740 else if (TREE_CODE (decl) == VAR_DECL
4741 && TREE_CODE (type) != REFERENCE_TYPE
4742 && CP_TYPE_CONST_P (type)
4743 && (!TYPE_NEEDS_CONSTRUCTING (type)
4744 || !type_has_user_provided_default_constructor (type))
4745 && !DECL_INITIAL (decl))
4747 permerror (DECL_SOURCE_LOCATION (decl),
4748 "uninitialized const %qD", decl);
4750 if (CLASS_TYPE_P (type)
4751 && !type_has_user_provided_default_constructor (type))
4753 tree defaulted_ctor;
4755 inform (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (type)),
4756 "%q#T has no user-provided default constructor", type);
4757 defaulted_ctor = in_class_defaulted_default_constructor (type);
4759 inform (DECL_SOURCE_LOCATION (defaulted_ctor),
4760 "constructor is not user-provided because it is "
4761 "explicitly defaulted in the class body");
4766 /* Structure holding the current initializer being processed by reshape_init.
4767 CUR is a pointer to the current element being processed, END is a pointer
4768 after the last element present in the initializer. */
4769 typedef struct reshape_iterator_t
4771 constructor_elt *cur;
4772 constructor_elt *end;
4775 static tree reshape_init_r (tree, reshape_iter *, bool);
4777 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
4778 returned is the next FIELD_DECL (possibly FIELD itself) that can be
4779 initialized. If there are no more such fields, the return value
4783 next_initializable_field (tree field)
4786 && (TREE_CODE (field) != FIELD_DECL
4787 || (DECL_C_BIT_FIELD (field) && !DECL_NAME (field))
4788 || DECL_ARTIFICIAL (field)))
4789 field = TREE_CHAIN (field);
4794 /* Subroutine of reshape_init_array and reshape_init_vector, which does
4795 the actual work. ELT_TYPE is the element type of the array. MAX_INDEX is an
4796 INTEGER_CST representing the size of the array minus one (the maximum index),
4797 or NULL_TREE if the array was declared without specifying the size. D is
4798 the iterator within the constructor. */
4801 reshape_init_array_1 (tree elt_type, tree max_index, reshape_iter *d)
4804 bool sized_array_p = (max_index != NULL_TREE);
4805 unsigned HOST_WIDE_INT max_index_cst = 0;
4806 unsigned HOST_WIDE_INT index;
4808 /* The initializer for an array is always a CONSTRUCTOR. */
4809 new_init = build_constructor (init_list_type_node, NULL);
4813 /* Minus 1 is used for zero sized arrays. */
4814 if (integer_all_onesp (max_index))
4817 if (host_integerp (max_index, 1))
4818 max_index_cst = tree_low_cst (max_index, 1);
4819 /* sizetype is sign extended, not zero extended. */
4821 max_index_cst = tree_low_cst (fold_convert (size_type_node, max_index),
4825 /* Loop until there are no more initializers. */
4827 d->cur != d->end && (!sized_array_p || index <= max_index_cst);
4832 check_array_designated_initializer (d->cur);
4833 elt_init = reshape_init_r (elt_type, d, /*first_initializer_p=*/false);
4834 if (elt_init == error_mark_node)
4835 return error_mark_node;
4836 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init), NULL_TREE, elt_init);
4842 /* Subroutine of reshape_init_r, processes the initializers for arrays.
4843 Parameters are the same of reshape_init_r. */
4846 reshape_init_array (tree type, reshape_iter *d)
4848 tree max_index = NULL_TREE;
4850 gcc_assert (TREE_CODE (type) == ARRAY_TYPE);
4852 if (TYPE_DOMAIN (type))
4853 max_index = array_type_nelts (type);
4855 return reshape_init_array_1 (TREE_TYPE (type), max_index, d);
4858 /* Subroutine of reshape_init_r, processes the initializers for vectors.
4859 Parameters are the same of reshape_init_r. */
4862 reshape_init_vector (tree type, reshape_iter *d)
4864 tree max_index = NULL_TREE;
4867 gcc_assert (TREE_CODE (type) == VECTOR_TYPE);
4869 if (COMPOUND_LITERAL_P (d->cur->value))
4871 tree value = d->cur->value;
4872 if (!same_type_p (TREE_TYPE (value), type))
4874 error ("invalid type %qT as initializer for a vector of type %qT",
4875 TREE_TYPE (d->cur->value), type);
4876 value = error_mark_node;
4882 /* For a vector, the representation type is a struct
4883 containing a single member which is an array of the
4884 appropriate size. */
4885 rtype = TYPE_DEBUG_REPRESENTATION_TYPE (type);
4886 if (rtype && TYPE_DOMAIN (TREE_TYPE (TYPE_FIELDS (rtype))))
4887 max_index = array_type_nelts (TREE_TYPE (TYPE_FIELDS (rtype)));
4889 return reshape_init_array_1 (TREE_TYPE (type), max_index, d);
4892 /* Subroutine of reshape_init_r, processes the initializers for classes
4893 or union. Parameters are the same of reshape_init_r. */
4896 reshape_init_class (tree type, reshape_iter *d, bool first_initializer_p)
4901 gcc_assert (CLASS_TYPE_P (type));
4903 /* The initializer for a class is always a CONSTRUCTOR. */
4904 new_init = build_constructor (init_list_type_node, NULL);
4905 field = next_initializable_field (TYPE_FIELDS (type));
4911 An initializer for an aggregate member that is an
4912 empty class shall have the form of an empty
4913 initializer-list {}. */
4914 if (!first_initializer_p)
4916 error ("initializer for %qT must be brace-enclosed", type);
4917 return error_mark_node;
4922 /* Loop through the initializable fields, gathering initializers. */
4923 while (d->cur != d->end)
4927 /* Handle designated initializers, as an extension. */
4930 field = lookup_field_1 (type, d->cur->index, /*want_type=*/false);
4932 if (!field || TREE_CODE (field) != FIELD_DECL)
4934 error ("%qT has no non-static data member named %qD", type,
4936 return error_mark_node;
4940 /* If we processed all the member of the class, we are done. */
4944 field_init = reshape_init_r (TREE_TYPE (field), d,
4945 /*first_initializer_p=*/false);
4946 if (field_init == error_mark_node)
4947 return error_mark_node;
4949 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init), field, field_init);
4953 When a union is initialized with a brace-enclosed
4954 initializer, the braces shall only contain an
4955 initializer for the first member of the union. */
4956 if (TREE_CODE (type) == UNION_TYPE)
4959 field = next_initializable_field (TREE_CHAIN (field));
4965 /* Subroutine of reshape_init, which processes a single initializer (part of
4966 a CONSTRUCTOR). TYPE is the type of the variable being initialized, D is the
4967 iterator within the CONSTRUCTOR which points to the initializer to process.
4968 FIRST_INITIALIZER_P is true if this is the first initializer of the
4969 outermost CONSTRUCTOR node. */
4972 reshape_init_r (tree type, reshape_iter *d, bool first_initializer_p)
4974 tree init = d->cur->value;
4976 if (error_operand_p (init))
4977 return error_mark_node;
4979 /* A non-aggregate type is always initialized with a single
4981 if (!CP_AGGREGATE_TYPE_P (type))
4983 /* It is invalid to initialize a non-aggregate type with a
4984 brace-enclosed initializer before C++0x.
4985 We need to check for BRACE_ENCLOSED_INITIALIZER_P here because
4986 of g++.old-deja/g++.mike/p7626.C: a pointer-to-member constant is
4987 a CONSTRUCTOR (with a record type). */
4988 if (TREE_CODE (init) == CONSTRUCTOR
4989 && BRACE_ENCLOSED_INITIALIZER_P (init)) /* p7626.C */
4991 if (SCALAR_TYPE_P (type))
4993 error ("braces around scalar initializer for type %qT", type);
4994 init = error_mark_node;
4997 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS);
5006 All implicit type conversions (clause _conv_) are considered when
5007 initializing the aggregate member with an initializer from an
5008 initializer-list. If the initializer can initialize a member,
5009 the member is initialized. Otherwise, if the member is itself a
5010 non-empty subaggregate, brace elision is assumed and the
5011 initializer is considered for the initialization of the first
5012 member of the subaggregate. */
5013 if (TREE_CODE (init) != CONSTRUCTOR
5014 /* But don't try this for the first initializer, since that would be
5015 looking through the outermost braces; A a2 = { a1 }; is not a
5016 valid aggregate initialization. */
5017 && !first_initializer_p
5018 && (same_type_ignoring_top_level_qualifiers_p (type, TREE_TYPE (init))
5019 || can_convert_arg (type, TREE_TYPE (init), init, LOOKUP_NORMAL)))
5025 /* [dcl.init.string]
5027 A char array (whether plain char, signed char, or unsigned char)
5028 can be initialized by a string-literal (optionally enclosed in
5029 braces); a wchar_t array can be initialized by a wide
5030 string-literal (optionally enclosed in braces). */
5031 if (TREE_CODE (type) == ARRAY_TYPE
5032 && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type))))
5034 tree str_init = init;
5036 /* Strip one level of braces if and only if they enclose a single
5037 element (as allowed by [dcl.init.string]). */
5038 if (!first_initializer_p
5039 && TREE_CODE (str_init) == CONSTRUCTOR
5040 && VEC_length (constructor_elt, CONSTRUCTOR_ELTS (str_init)) == 1)
5042 str_init = VEC_index (constructor_elt,
5043 CONSTRUCTOR_ELTS (str_init), 0)->value;
5046 /* If it's a string literal, then it's the initializer for the array
5047 as a whole. Otherwise, continue with normal initialization for
5048 array types (one value per array element). */
5049 if (TREE_CODE (str_init) == STRING_CST)
5056 /* The following cases are about aggregates. If we are not within a full
5057 initializer already, and there is not a CONSTRUCTOR, it means that there
5058 is a missing set of braces (that is, we are processing the case for
5059 which reshape_init exists). */
5060 if (!first_initializer_p)
5062 if (TREE_CODE (init) == CONSTRUCTOR)
5064 if (TREE_TYPE (init) && TYPE_PTRMEMFUNC_P (TREE_TYPE (init)))
5065 /* There is no need to reshape pointer-to-member function
5066 initializers, as they are always constructed correctly
5067 by the front end. */
5069 else if (COMPOUND_LITERAL_P (init))
5070 /* For a nested compound literal, there is no need to reshape since
5071 brace elision is not allowed. Even if we decided to allow it,
5072 we should add a call to reshape_init in finish_compound_literal,
5073 before calling digest_init, so changing this code would still
5074 not be necessary. */
5075 gcc_assert (!BRACE_ENCLOSED_INITIALIZER_P (init));
5079 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init));
5080 return reshape_init (type, init);
5084 warning (OPT_Wmissing_braces, "missing braces around initializer for %qT",
5088 /* Dispatch to specialized routines. */
5089 if (CLASS_TYPE_P (type))
5090 return reshape_init_class (type, d, first_initializer_p);
5091 else if (TREE_CODE (type) == ARRAY_TYPE)
5092 return reshape_init_array (type, d);
5093 else if (TREE_CODE (type) == VECTOR_TYPE)
5094 return reshape_init_vector (type, d);
5099 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
5100 brace-enclosed aggregate initializer.
5102 INIT is the CONSTRUCTOR containing the list of initializers describing
5103 a brace-enclosed initializer for an entity of the indicated aggregate TYPE.
5104 It may not presently match the shape of the TYPE; for example:
5106 struct S { int a; int b; };
5107 struct S a[] = { 1, 2, 3, 4 };
5109 Here INIT will hold a VEC of four elements, rather than a
5110 VEC of two elements, each itself a VEC of two elements. This
5111 routine transforms INIT from the former form into the latter. The
5112 revised CONSTRUCTOR node is returned. */
5115 reshape_init (tree type, tree init)
5117 VEC(constructor_elt, gc) *v;
5121 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init));
5123 v = CONSTRUCTOR_ELTS (init);
5125 /* An empty constructor does not need reshaping, and it is always a valid
5127 if (VEC_empty (constructor_elt, v))
5130 /* Recurse on this CONSTRUCTOR. */
5131 d.cur = VEC_index (constructor_elt, v, 0);
5132 d.end = d.cur + VEC_length (constructor_elt, v);
5134 new_init = reshape_init_r (type, &d, true);
5135 if (new_init == error_mark_node)
5136 return error_mark_node;
5138 /* Make sure all the element of the constructor were used. Otherwise,
5139 issue an error about exceeding initializers. */
5141 error ("too many initializers for %qT", type);
5146 /* Verify array initializer. Returns true if errors have been reported. */
5149 check_array_initializer (tree decl, tree type, tree init)
5151 tree element_type = TREE_TYPE (type);
5153 /* The array type itself need not be complete, because the
5154 initializer may tell us how many elements are in the array.
5155 But, the elements of the array must be complete. */
5156 if (!COMPLETE_TYPE_P (complete_type (element_type)))
5159 error ("elements of array %q#D have incomplete type", decl);
5161 error ("elements of array %q#T have incomplete type", type);
5164 /* It is not valid to initialize a VLA. */
5166 && ((COMPLETE_TYPE_P (type) && !TREE_CONSTANT (TYPE_SIZE (type)))
5167 || !TREE_CONSTANT (TYPE_SIZE (element_type))))
5170 error ("variable-sized object %qD may not be initialized", decl);
5172 error ("variable-sized compound literal");
5178 /* Subroutine of check_initializer; args are passed down from that function.
5179 Set stmts_are_full_exprs_p to 1 across a call to build_aggr_init. */
5182 build_aggr_init_full_exprs (tree decl, tree init, int flags)
5185 int saved_stmts_are_full_exprs_p = 0;
5186 if (building_stmt_tree ())
5188 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
5189 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
5191 init = build_aggr_init (decl, init, flags, tf_warning_or_error);
5192 if (building_stmt_tree ())
5193 current_stmt_tree ()->stmts_are_full_exprs_p =
5194 saved_stmts_are_full_exprs_p;
5198 /* Verify INIT (the initializer for DECL), and record the
5199 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
5200 grok_reference_init.
5202 If the return value is non-NULL, it is an expression that must be
5203 evaluated dynamically to initialize DECL. */
5206 check_initializer (tree decl, tree init, int flags, tree *cleanup)
5208 tree type = TREE_TYPE (decl);
5209 tree init_code = NULL;
5212 /* Things that are going to be initialized need to have complete
5214 TREE_TYPE (decl) = type = complete_type (TREE_TYPE (decl));
5216 if (type == error_mark_node)
5217 /* We will have already complained. */
5220 if (TREE_CODE (type) == ARRAY_TYPE)
5222 if (check_array_initializer (decl, type, init))
5225 else if (!COMPLETE_TYPE_P (type))
5227 error ("%qD has incomplete type", decl);
5228 TREE_TYPE (decl) = error_mark_node;
5232 /* There is no way to make a variable-sized class type in GNU C++. */
5233 gcc_assert (TREE_CONSTANT (TYPE_SIZE (type)));
5235 if (init && BRACE_ENCLOSED_INITIALIZER_P (init))
5237 int init_len = VEC_length (constructor_elt, CONSTRUCTOR_ELTS (init));
5238 if (SCALAR_TYPE_P (type))
5242 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS);
5243 init = build_zero_init (type, NULL_TREE, false);
5245 else if (init_len != 1)
5247 error ("scalar object %qD requires one element in initializer",
5249 TREE_TYPE (decl) = error_mark_node;
5255 if (TREE_CODE (decl) == CONST_DECL)
5257 gcc_assert (TREE_CODE (type) != REFERENCE_TYPE);
5259 DECL_INITIAL (decl) = init;
5261 gcc_assert (init != NULL_TREE);
5264 else if (!DECL_EXTERNAL (decl) && TREE_CODE (type) == REFERENCE_TYPE)
5265 init = grok_reference_init (decl, type, init, cleanup);
5268 /* Do not reshape constructors of vectors (they don't need to be
5270 if (BRACE_ENCLOSED_INITIALIZER_P (init))
5272 if (is_std_init_list (type))
5273 return build_init_list_var_init (decl, type, init, cleanup);
5274 else if (TYPE_NON_AGGREGATE_CLASS (type))
5276 /* Don't reshape if the class has constructors. */
5277 if (cxx_dialect == cxx98)
5278 error ("in C++98 %qD must be initialized by constructor, "
5281 init = build_tree_list (NULL_TREE, init);
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"