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, "
5282 else if (TREE_CODE (type) == VECTOR_TYPE && TYPE_VECTOR_OPAQUE (type))
5284 error ("opaque vector types cannot be initialized");
5285 init = error_mark_node;
5288 init = reshape_init (type, init);
5291 /* If DECL has an array type without a specific bound, deduce the
5292 array size from the initializer. */
5293 maybe_deduce_size_from_array_init (decl, init);
5294 type = TREE_TYPE (decl);
5295 if (type == error_mark_node)
5298 if (TYPE_NEEDS_CONSTRUCTING (type)
5299 || (CLASS_TYPE_P (type)
5300 && !BRACE_ENCLOSED_INITIALIZER_P (init)))
5301 return build_aggr_init_full_exprs (decl, init, flags);
5302 else if (TREE_CODE (init) != TREE_VEC)
5304 init_code = store_init_value (decl, init, flags);
5305 if (pedantic && TREE_CODE (type) == ARRAY_TYPE
5306 && DECL_INITIAL (decl)
5307 && TREE_CODE (DECL_INITIAL (decl)) == STRING_CST
5308 && PAREN_STRING_LITERAL_P (DECL_INITIAL (decl)))
5309 warning (0, "array %qD initialized by parenthesized string literal %qE",
5310 decl, DECL_INITIAL (decl));
5314 else if (DECL_EXTERNAL (decl))
5316 else if (TYPE_P (type) && TYPE_NEEDS_CONSTRUCTING (type))
5318 check_for_uninitialized_const_var (decl);
5319 return build_aggr_init_full_exprs (decl, init, flags);
5321 else if (MAYBE_CLASS_TYPE_P (core_type = strip_array_types (type)))
5323 if (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type)
5324 || CLASSTYPE_REF_FIELDS_NEED_INIT (core_type))
5325 diagnose_uninitialized_cst_or_ref_member (core_type, /*using_new=*/false,
5328 check_for_uninitialized_const_var (decl);
5331 check_for_uninitialized_const_var (decl);
5333 if (init && init != error_mark_node)
5334 init_code = build2 (INIT_EXPR, type, decl, init);
5339 /* If DECL is not a local variable, give it RTL. */
5342 make_rtl_for_nonlocal_decl (tree decl, tree init, const char* asmspec)
5344 int toplev = toplevel_bindings_p ();
5346 const char *filename;
5348 /* Set the DECL_ASSEMBLER_NAME for the object. */
5351 /* The `register' keyword, when used together with an
5352 asm-specification, indicates that the variable should be
5353 placed in a particular register. */
5354 if (TREE_CODE (decl) == VAR_DECL && DECL_REGISTER (decl))
5356 set_user_assembler_name (decl, asmspec);
5357 DECL_HARD_REGISTER (decl) = 1;
5361 if (TREE_CODE (decl) == FUNCTION_DECL
5362 && DECL_BUILT_IN_CLASS (decl) == BUILT_IN_NORMAL)
5363 set_builtin_user_assembler_name (decl, asmspec);
5364 set_user_assembler_name (decl, asmspec);
5368 /* Handle non-variables up front. */
5369 if (TREE_CODE (decl) != VAR_DECL)
5371 rest_of_decl_compilation (decl, toplev, at_eof);
5375 /* If we see a class member here, it should be a static data
5377 if (DECL_LANG_SPECIFIC (decl) && DECL_IN_AGGR_P (decl))
5379 gcc_assert (TREE_STATIC (decl));
5380 /* An in-class declaration of a static data member should be
5381 external; it is only a declaration, and not a definition. */
5382 if (init == NULL_TREE)
5383 gcc_assert (DECL_EXTERNAL (decl) || !TREE_PUBLIC (decl));
5386 /* We don't create any RTL for local variables. */
5387 if (DECL_FUNCTION_SCOPE_P (decl) && !TREE_STATIC (decl))
5390 /* We defer emission of local statics until the corresponding
5391 DECL_EXPR is expanded. */
5392 defer_p = DECL_FUNCTION_SCOPE_P (decl) || DECL_VIRTUAL_P (decl);
5394 /* We try to defer namespace-scope static constants so that they are
5395 not emitted into the object file unnecessarily. */
5396 filename = input_filename;
5397 if (!DECL_VIRTUAL_P (decl)
5398 && TREE_READONLY (decl)
5399 && DECL_INITIAL (decl) != NULL_TREE
5400 && DECL_INITIAL (decl) != error_mark_node
5402 && ! EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl))
5404 && !TREE_PUBLIC (decl))
5406 /* Fool with the linkage of static consts according to #pragma
5408 struct c_fileinfo *finfo = get_fileinfo (filename);
5409 if (!finfo->interface_unknown && !TREE_PUBLIC (decl))
5411 TREE_PUBLIC (decl) = 1;
5412 DECL_EXTERNAL (decl) = finfo->interface_only;
5417 /* Likewise for template instantiations. */
5418 else if (DECL_LANG_SPECIFIC (decl)
5419 && DECL_IMPLICIT_INSTANTIATION (decl))
5422 /* If we're not deferring, go ahead and assemble the variable. */
5424 rest_of_decl_compilation (decl, toplev, at_eof);
5427 /* walk_tree helper for wrap_temporary_cleanups, below. */
5430 wrap_cleanups_r (tree *stmt_p, int *walk_subtrees, void *data)
5432 if (TYPE_P (*stmt_p))
5438 if (TREE_CODE (*stmt_p) == TARGET_EXPR)
5440 tree guard = (tree)data;
5441 tree tcleanup = TARGET_EXPR_CLEANUP (*stmt_p);
5443 tcleanup = build2 (TRY_CATCH_EXPR, void_type_node, tcleanup, guard);
5444 /* Tell honor_protect_cleanup_actions to handle this as a separate
5446 TRY_CATCH_IS_CLEANUP (tcleanup) = 1;
5448 TARGET_EXPR_CLEANUP (*stmt_p) = tcleanup;
5454 /* We're initializing a local variable which has a cleanup GUARD. If there
5455 are any temporaries used in the initializer INIT of this variable, we
5456 need to wrap their cleanups with TRY_CATCH_EXPR (, GUARD) so that the
5457 variable will be cleaned up properly if one of them throws.
5459 Unfortunately, there's no way to express this properly in terms of
5460 nesting, as the regions for the temporaries overlap the region for the
5461 variable itself; if there are two temporaries, the variable needs to be
5462 the first thing destroyed if either of them throws. However, we only
5463 want to run the variable's cleanup if it actually got constructed. So
5464 we need to guard the temporary cleanups with the variable's cleanup if
5465 they are run on the normal path, but not if they are run on the
5466 exceptional path. We implement this by telling
5467 honor_protect_cleanup_actions to strip the variable cleanup from the
5468 exceptional path. */
5471 wrap_temporary_cleanups (tree init, tree guard)
5473 cp_walk_tree_without_duplicates (&init, wrap_cleanups_r, (void *)guard);
5476 /* Generate code to initialize DECL (a local variable). */
5479 initialize_local_var (tree decl, tree init)
5481 tree type = TREE_TYPE (decl);
5485 gcc_assert (TREE_CODE (decl) == VAR_DECL
5486 || TREE_CODE (decl) == RESULT_DECL);
5487 gcc_assert (!TREE_STATIC (decl));
5489 if (DECL_SIZE (decl) == NULL_TREE)
5491 /* If we used it already as memory, it must stay in memory. */
5492 DECL_INITIAL (decl) = NULL_TREE;
5493 TREE_ADDRESSABLE (decl) = TREE_USED (decl);
5497 if (type == error_mark_node)
5500 /* Compute and store the initial value. */
5501 already_used = TREE_USED (decl) || TREE_USED (type);
5503 /* Generate a cleanup, if necessary. */
5504 cleanup = cxx_maybe_build_cleanup (decl);
5506 /* Perform the initialization. */
5509 int saved_stmts_are_full_exprs_p;
5511 /* If we're only initializing a single object, guard the destructors
5512 of any temporaries used in its initializer with its destructor.
5513 This isn't right for arrays because each element initialization is
5514 a full-expression. */
5515 if (cleanup && TREE_CODE (type) != ARRAY_TYPE)
5516 wrap_temporary_cleanups (init, cleanup);
5518 gcc_assert (building_stmt_tree ());
5519 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
5520 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
5521 finish_expr_stmt (init);
5522 current_stmt_tree ()->stmts_are_full_exprs_p =
5523 saved_stmts_are_full_exprs_p;
5526 /* Set this to 0 so we can tell whether an aggregate which was
5527 initialized was ever used. Don't do this if it has a
5528 destructor, so we don't complain about the 'resource
5529 allocation is initialization' idiom. Now set
5530 attribute((unused)) on types so decls of that type will be
5531 marked used. (see TREE_USED, above.) */
5532 if (TYPE_NEEDS_CONSTRUCTING (type)
5534 && TYPE_HAS_TRIVIAL_DESTRUCTOR (type)
5535 && DECL_NAME (decl))
5536 TREE_USED (decl) = 0;
5537 else if (already_used)
5538 TREE_USED (decl) = 1;
5541 finish_decl_cleanup (decl, cleanup);
5544 /* DECL is a VAR_DECL for a compiler-generated variable with static
5545 storage duration (like a virtual table) whose initializer is a
5546 compile-time constant. INIT must be either a TREE_LIST of values,
5547 or a CONSTRUCTOR. Initialize the variable and provide it to the
5551 initialize_artificial_var (tree decl, tree init)
5553 gcc_assert (DECL_ARTIFICIAL (decl));
5554 if (TREE_CODE (init) == TREE_LIST)
5555 init = build_constructor_from_list (TREE_TYPE (decl), init);
5556 gcc_assert (TREE_CODE (init) == CONSTRUCTOR);
5557 DECL_INITIAL (decl) = init;
5558 DECL_INITIALIZED_P (decl) = 1;
5559 determine_visibility (decl);
5560 layout_var_decl (decl);
5561 maybe_commonize_var (decl);
5562 make_rtl_for_nonlocal_decl (decl, init, /*asmspec=*/NULL);
5565 /* INIT is the initializer for a variable, as represented by the
5566 parser. Returns true iff INIT is value-dependent. */
5569 value_dependent_init_p (tree init)
5571 if (TREE_CODE (init) == TREE_LIST)
5572 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
5573 return any_value_dependent_elements_p (init);
5574 else if (TREE_CODE (init) == CONSTRUCTOR)
5575 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
5577 VEC(constructor_elt, gc) *elts;
5581 elts = CONSTRUCTOR_ELTS (init);
5582 nelts = VEC_length (constructor_elt, elts);
5583 for (i = 0; i < nelts; ++i)
5584 if (value_dependent_init_p (VEC_index (constructor_elt,
5589 /* It must be a simple expression, e.g., int i = 3; */
5590 return value_dependent_expression_p (init);
5595 /* Finish processing of a declaration;
5596 install its line number and initial value.
5597 If the length of an array type is not known before,
5598 it must be determined now, from the initial value, or it is an error.
5600 INIT is the initializer (if any) for DECL. If INIT_CONST_EXPR_P is
5601 true, then INIT is an integral constant expression.
5603 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
5604 if the (init) syntax was used. */
5607 cp_finish_decl (tree decl, tree init, bool init_const_expr_p,
5608 tree asmspec_tree, int flags)
5612 const char *asmspec = NULL;
5613 int was_readonly = 0;
5614 bool var_definition_p = false;
5615 int saved_processing_template_decl;
5618 if (decl == error_mark_node)
5623 error ("assignment (not initialization) in declaration");
5627 gcc_assert (TREE_CODE (decl) != RESULT_DECL);
5628 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
5629 gcc_assert (TREE_CODE (decl) != PARM_DECL);
5631 type = TREE_TYPE (decl);
5632 if (type == error_mark_node)
5635 /* Assume no cleanup is required. */
5636 cleanup = NULL_TREE;
5637 saved_processing_template_decl = processing_template_decl;
5639 /* If a name was specified, get the string. */
5640 if (global_scope_p (current_binding_level))
5641 asmspec_tree = maybe_apply_renaming_pragma (decl, asmspec_tree);
5642 if (asmspec_tree && asmspec_tree != error_mark_node)
5643 asmspec = TREE_STRING_POINTER (asmspec_tree);
5645 if (current_class_type
5646 && CP_DECL_CONTEXT (decl) == current_class_type
5647 && TYPE_BEING_DEFINED (current_class_type)
5648 && (DECL_INITIAL (decl) || init))
5649 DECL_INITIALIZED_IN_CLASS_P (decl) = 1;
5651 auto_node = type_uses_auto (type);
5654 if (init == NULL_TREE)
5656 error ("declaration of %q#D has no initializer", decl);
5657 TREE_TYPE (decl) = error_mark_node;
5660 if (TREE_CODE (init) == TREE_LIST)
5661 init = build_x_compound_expr_from_list (init, "initializer");
5662 if (describable_type (init))
5664 type = TREE_TYPE (decl) = do_auto_deduction (type, init, auto_node);
5665 if (type == error_mark_node)
5670 if (init && TREE_CODE (decl) == FUNCTION_DECL)
5673 if (init == ridpointers[(int)RID_DELETE])
5675 /* FIXME check this is 1st decl. */
5676 DECL_DELETED_FN (decl) = 1;
5677 DECL_DECLARED_INLINE_P (decl) = 1;
5678 DECL_INITIAL (decl) = error_mark_node;
5679 FOR_EACH_CLONE (clone, decl)
5681 DECL_DELETED_FN (clone) = 1;
5682 DECL_DECLARED_INLINE_P (clone) = 1;
5683 DECL_INITIAL (clone) = error_mark_node;
5687 else if (init == ridpointers[(int)RID_DEFAULT])
5689 if (defaultable_fn_check (decl))
5690 DECL_DEFAULTED_FN (decl) = 1;
5692 DECL_INITIAL (decl) = NULL_TREE;
5696 if (processing_template_decl)
5698 bool type_dependent_p;
5700 /* Add this declaration to the statement-tree. */
5701 if (at_function_scope_p ())
5702 add_decl_expr (decl);
5704 type_dependent_p = dependent_type_p (type);
5706 if (check_for_bare_parameter_packs (init))
5709 DECL_INITIAL (decl) = NULL_TREE;
5712 if (init && init_const_expr_p && TREE_CODE (decl) == VAR_DECL)
5714 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl) = 1;
5715 if (DECL_INTEGRAL_CONSTANT_VAR_P (decl))
5716 TREE_CONSTANT (decl) = 1;
5719 /* Generally, initializers in templates are expanded when the
5720 template is instantiated. But, if DECL is an integral
5721 constant static data member, then it can be used in future
5722 integral constant expressions, and its value must be
5725 && DECL_CLASS_SCOPE_P (decl)
5726 && DECL_INTEGRAL_CONSTANT_VAR_P (decl)
5727 && !type_dependent_p
5728 && !value_dependent_init_p (init)))
5731 DECL_INITIAL (decl) = init;
5732 if (TREE_CODE (decl) == VAR_DECL
5733 && !DECL_PRETTY_FUNCTION_P (decl)
5734 && !type_dependent_p)
5735 maybe_deduce_size_from_array_init (decl, init);
5739 if (TREE_CODE (init) == TREE_LIST)
5741 /* If the parenthesized-initializer form was used (e.g.,
5742 "int A<N>::i(X)"), then INIT will be a TREE_LIST of initializer
5743 arguments. (There is generally only one.) We convert them
5746 for (; list; list = TREE_CHAIN (list))
5748 tree elt = TREE_VALUE (list);
5749 TREE_VALUE (list) = fold_non_dependent_expr (elt);
5753 init = fold_non_dependent_expr (init);
5754 processing_template_decl = 0;
5757 /* Take care of TYPE_DECLs up front. */
5758 if (TREE_CODE (decl) == TYPE_DECL)
5760 if (type != error_mark_node
5761 && MAYBE_CLASS_TYPE_P (type) && DECL_NAME (decl))
5763 if (TREE_TYPE (DECL_NAME (decl)) && TREE_TYPE (decl) != type)
5764 warning (0, "shadowing previous type declaration of %q#D", decl);
5765 set_identifier_type_value (DECL_NAME (decl), decl);
5768 /* If we have installed this as the canonical typedef for this
5769 type, and that type has not been defined yet, delay emitting
5770 the debug information for it, as we will emit it later. */
5771 if (TYPE_MAIN_DECL (TREE_TYPE (decl)) == decl
5772 && !COMPLETE_TYPE_P (TREE_TYPE (decl)))
5773 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
5775 rest_of_decl_compilation (decl, DECL_CONTEXT (decl) == NULL_TREE,
5780 /* A reference will be modified here, as it is initialized. */
5781 if (! DECL_EXTERNAL (decl)
5782 && TREE_READONLY (decl)
5783 && TREE_CODE (type) == REFERENCE_TYPE)
5786 TREE_READONLY (decl) = 0;
5789 if (TREE_CODE (decl) == VAR_DECL)
5791 /* Only variables with trivial initialization and destruction can
5792 have thread-local storage. */
5793 if (DECL_THREAD_LOCAL_P (decl)
5794 && (type_has_nontrivial_default_init (TREE_TYPE (decl))
5795 || TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl))))
5796 error ("%qD cannot be thread-local because it has non-trivial "
5797 "type %qT", decl, TREE_TYPE (decl));
5798 /* If this is a local variable that will need a mangled name,
5799 register it now. We must do this before processing the
5800 initializer for the variable, since the initialization might
5801 require a guard variable, and since the mangled name of the
5802 guard variable will depend on the mangled name of this
5804 if (DECL_FUNCTION_SCOPE_P (decl)
5805 && TREE_STATIC (decl)
5806 && !DECL_ARTIFICIAL (decl))
5808 push_local_name (decl);
5809 if (DECL_CONSTRUCTOR_P (current_function_decl)
5810 || DECL_DESTRUCTOR_P (current_function_decl))
5811 /* Normally local_decls is populated during GIMPLE lowering,
5812 but [cd]tors are never actually compiled directly. We need
5813 to put statics on the list so we can deal with the label
5814 address extension. */
5815 cfun->local_decls = tree_cons (NULL_TREE, decl,
5819 /* Convert the initializer to the type of DECL, if we have not
5820 already initialized DECL. */
5821 if (!DECL_INITIALIZED_P (decl)
5822 /* If !DECL_EXTERNAL then DECL is being defined. In the
5823 case of a static data member initialized inside the
5824 class-specifier, there can be an initializer even if DECL
5825 is *not* defined. */
5826 && (!DECL_EXTERNAL (decl) || init))
5828 if (TYPE_FOR_JAVA (type) && MAYBE_CLASS_TYPE_P (type))
5831 = IDENTIFIER_GLOBAL_VALUE (get_identifier ("jclass"));
5832 /* Allow libjava/prims.cc define primitive classes. */
5833 if (init != NULL_TREE
5834 || jclass == NULL_TREE
5835 || TREE_CODE (jclass) != TYPE_DECL
5836 || !POINTER_TYPE_P (TREE_TYPE (jclass))
5837 || !same_type_ignoring_top_level_qualifiers_p
5838 (type, TREE_TYPE (TREE_TYPE (jclass))))
5839 error ("Java object %qD not allocated with %<new%>", decl);
5844 DECL_NONTRIVIALLY_INITIALIZED_P (decl) = 1;
5845 if (init_const_expr_p)
5847 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl) = 1;
5848 if (DECL_INTEGRAL_CONSTANT_VAR_P (decl))
5849 TREE_CONSTANT (decl) = 1;
5852 init = check_initializer (decl, init, flags, &cleanup);
5853 /* Thread-local storage cannot be dynamically initialized. */
5854 if (DECL_THREAD_LOCAL_P (decl) && init)
5856 error ("%qD is thread-local and so cannot be dynamically "
5857 "initialized", decl);
5861 /* Check that the initializer for a static data member was a
5862 constant. Although we check in the parser that the
5863 initializer is an integral constant expression, we do not
5864 simplify division-by-zero at the point at which it
5865 occurs. Therefore, in:
5867 struct S { static const int i = 7 / 0; };
5869 we issue an error at this point. It would
5870 probably be better to forbid division by zero in
5871 integral constant expressions. */
5872 if (DECL_EXTERNAL (decl) && init)
5874 error ("%qD cannot be initialized by a non-constant expression"
5875 " when being declared", decl);
5876 DECL_INITIALIZED_IN_CLASS_P (decl) = 0;
5884 The memory occupied by any object of static storage
5885 duration is zero-initialized at program startup before
5886 any other initialization takes place.
5888 We cannot create an appropriate initializer until after
5889 the type of DECL is finalized. If DECL_INITIAL is set,
5890 then the DECL is statically initialized, and any
5891 necessary zero-initialization has already been performed. */
5892 if (TREE_STATIC (decl) && !DECL_INITIAL (decl))
5893 DECL_INITIAL (decl) = build_zero_init (TREE_TYPE (decl),
5894 /*nelts=*/NULL_TREE,
5895 /*static_storage_p=*/true);
5896 /* Remember that the initialization for this variable has
5898 DECL_INITIALIZED_P (decl) = 1;
5899 /* This declaration is the definition of this variable,
5900 unless we are initializing a static data member within
5901 the class specifier. */
5902 if (!DECL_EXTERNAL (decl))
5903 var_definition_p = true;
5905 /* If the variable has an array type, lay out the type, even if
5906 there is no initializer. It is valid to index through the
5907 array, and we must get TYPE_ALIGN set correctly on the array
5909 else if (TREE_CODE (type) == ARRAY_TYPE)
5912 if (!processing_template_decl
5913 && TREE_STATIC (decl)
5914 && !at_function_scope_p ()
5915 && current_function_decl == NULL)
5916 /* So decl is a global variable or a static member of a
5917 non local class. Record the types it uses
5918 so that we can decide later to emit debug info for them. */
5919 record_types_used_by_current_var_decl (decl);
5921 else if (TREE_CODE (decl) == FIELD_DECL
5922 && TYPE_FOR_JAVA (type) && MAYBE_CLASS_TYPE_P (type))
5923 error ("non-static data member %qD has Java class type", decl);
5925 /* Add this declaration to the statement-tree. This needs to happen
5926 after the call to check_initializer so that the DECL_EXPR for a
5927 reference temp is added before the DECL_EXPR for the reference itself. */
5928 if (at_function_scope_p ())
5929 add_decl_expr (decl);
5931 /* Let the middle end know about variables and functions -- but not
5932 static data members in uninstantiated class templates. */
5933 if (!saved_processing_template_decl
5934 && (TREE_CODE (decl) == VAR_DECL
5935 || TREE_CODE (decl) == FUNCTION_DECL))
5937 if (TREE_CODE (decl) == VAR_DECL)
5939 layout_var_decl (decl);
5940 maybe_commonize_var (decl);
5943 /* This needs to happen after the linkage is set. */
5944 determine_visibility (decl);
5946 if (var_definition_p && TREE_STATIC (decl))
5948 /* If a TREE_READONLY variable needs initialization
5949 at runtime, it is no longer readonly and we need to
5950 avoid MEM_READONLY_P being set on RTL created for it. */
5953 if (TREE_READONLY (decl))
5954 TREE_READONLY (decl) = 0;
5957 else if (was_readonly)
5958 TREE_READONLY (decl) = 1;
5961 make_rtl_for_nonlocal_decl (decl, init, asmspec);
5963 /* Check for abstractness of the type. Notice that there is no
5964 need to strip array types here since the check for those types
5965 is already done within create_array_type_for_decl. */
5966 if (TREE_CODE (type) == FUNCTION_TYPE
5967 || TREE_CODE (type) == METHOD_TYPE)
5968 abstract_virtuals_error (decl, TREE_TYPE (type));
5970 abstract_virtuals_error (decl, type);
5972 if (TREE_TYPE (decl) == error_mark_node)
5973 /* No initialization required. */
5975 else if (TREE_CODE (decl) == FUNCTION_DECL)
5979 if (init == ridpointers[(int)RID_DEFAULT])
5981 /* An out-of-class default definition is defined at
5982 the point where it is explicitly defaulted. */
5983 if (DECL_INITIAL (decl) == error_mark_node)
5984 synthesize_method (decl);
5987 error ("function %q#D is initialized like a variable", decl);
5989 /* else no initialization required. */
5991 else if (DECL_EXTERNAL (decl)
5992 && ! (DECL_LANG_SPECIFIC (decl)
5993 && DECL_NOT_REALLY_EXTERN (decl)))
5996 DECL_INITIAL (decl) = init;
5998 /* A variable definition. */
5999 else if (DECL_FUNCTION_SCOPE_P (decl) && !TREE_STATIC (decl))
6000 /* Initialize the local variable. */
6001 initialize_local_var (decl, init);
6003 /* If a variable is defined, and then a subsequent
6004 definition with external linkage is encountered, we will
6005 get here twice for the same variable. We want to avoid
6006 calling expand_static_init more than once. For variables
6007 that are not static data members, we can call
6008 expand_static_init only when we actually process the
6009 initializer. It is not legal to redeclare a static data
6010 member, so this issue does not arise in that case. */
6011 else if (var_definition_p && TREE_STATIC (decl))
6012 expand_static_init (decl, init);
6015 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
6016 reference, insert it in the statement-tree now. */
6018 push_cleanup (decl, cleanup, false);
6021 processing_template_decl = saved_processing_template_decl;
6024 TREE_READONLY (decl) = 1;
6027 /* Returns a declaration for a VAR_DECL as if:
6029 extern "C" TYPE NAME;
6031 had been seen. Used to create compiler-generated global
6035 declare_global_var (tree name, tree type)
6039 push_to_top_level ();
6040 decl = build_decl (input_location, VAR_DECL, name, type);
6041 TREE_PUBLIC (decl) = 1;
6042 DECL_EXTERNAL (decl) = 1;
6043 DECL_ARTIFICIAL (decl) = 1;
6044 /* If the user has explicitly declared this variable (perhaps
6045 because the code we are compiling is part of a low-level runtime
6046 library), then it is possible that our declaration will be merged
6047 with theirs by pushdecl. */
6048 decl = pushdecl (decl);
6049 cp_finish_decl (decl, NULL_TREE, false, NULL_TREE, 0);
6050 pop_from_top_level ();
6055 /* Returns the type for the argument to "__cxa_atexit" (or "atexit",
6056 if "__cxa_atexit" is not being used) corresponding to the function
6057 to be called when the program exits. */
6060 get_atexit_fn_ptr_type (void)
6065 if (!atexit_fn_ptr_type_node)
6067 if (flag_use_cxa_atexit
6068 && !targetm.cxx.use_atexit_for_cxa_atexit ())
6069 /* The parameter to "__cxa_atexit" is "void (*)(void *)". */
6070 arg_types = tree_cons (NULL_TREE, ptr_type_node, void_list_node);
6072 /* The parameter to "atexit" is "void (*)(void)". */
6073 arg_types = void_list_node;
6075 fn_type = build_function_type (void_type_node, arg_types);
6076 atexit_fn_ptr_type_node = build_pointer_type (fn_type);
6079 return atexit_fn_ptr_type_node;
6082 /* Returns a pointer to the `atexit' function. Note that if
6083 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
6084 `__cxa_atexit' function specified in the IA64 C++ ABI. */
6087 get_atexit_node (void)
6094 bool use_aeabi_atexit;
6099 if (flag_use_cxa_atexit && !targetm.cxx.use_atexit_for_cxa_atexit ())
6101 /* The declaration for `__cxa_atexit' is:
6103 int __cxa_atexit (void (*)(void *), void *, void *)
6105 We build up the argument types and then then function type
6108 use_aeabi_atexit = targetm.cxx.use_aeabi_atexit ();
6109 /* First, build the pointer-to-function type for the first
6111 fn_ptr_type = get_atexit_fn_ptr_type ();
6112 /* Then, build the rest of the argument types. */
6113 arg_types = tree_cons (NULL_TREE, ptr_type_node, void_list_node);
6114 if (use_aeabi_atexit)
6116 arg_types = tree_cons (NULL_TREE, fn_ptr_type, arg_types);
6117 arg_types = tree_cons (NULL_TREE, ptr_type_node, arg_types);
6121 arg_types = tree_cons (NULL_TREE, ptr_type_node, arg_types);
6122 arg_types = tree_cons (NULL_TREE, fn_ptr_type, arg_types);
6124 /* And the final __cxa_atexit type. */
6125 fn_type = build_function_type (integer_type_node, arg_types);
6126 fn_ptr_type = build_pointer_type (fn_type);
6127 if (use_aeabi_atexit)
6128 name = "__aeabi_atexit";
6130 name = "__cxa_atexit";
6134 /* The declaration for `atexit' is:
6136 int atexit (void (*)());
6138 We build up the argument types and then then function type
6140 fn_ptr_type = get_atexit_fn_ptr_type ();
6141 arg_types = tree_cons (NULL_TREE, fn_ptr_type, void_list_node);
6142 /* Build the final atexit type. */
6143 fn_type = build_function_type (integer_type_node, arg_types);
6147 /* Now, build the function declaration. */
6148 push_lang_context (lang_name_c);
6149 atexit_fndecl = build_library_fn_ptr (name, fn_type);
6150 mark_used (atexit_fndecl);
6151 pop_lang_context ();
6152 atexit_node = decay_conversion (atexit_fndecl);
6157 /* Returns the __dso_handle VAR_DECL. */
6160 get_dso_handle_node (void)
6162 if (dso_handle_node)
6163 return dso_handle_node;
6165 /* Declare the variable. */
6166 dso_handle_node = declare_global_var (get_identifier ("__dso_handle"),
6169 return dso_handle_node;
6172 /* Begin a new function with internal linkage whose job will be simply
6173 to destroy some particular variable. */
6175 static GTY(()) int start_cleanup_cnt;
6178 start_cleanup_fn (void)
6183 bool use_cxa_atexit = flag_use_cxa_atexit
6184 && !targetm.cxx.use_atexit_for_cxa_atexit ();
6186 push_to_top_level ();
6188 /* No need to mangle this. */
6189 push_lang_context (lang_name_c);
6191 /* Build the name of the function. */
6192 sprintf (name, "__tcf_%d", start_cleanup_cnt++);
6193 /* Build the function declaration. */
6194 fntype = TREE_TYPE (get_atexit_fn_ptr_type ());
6195 fndecl = build_lang_decl (FUNCTION_DECL, get_identifier (name), fntype);
6196 /* It's a function with internal linkage, generated by the
6198 TREE_PUBLIC (fndecl) = 0;
6199 DECL_ARTIFICIAL (fndecl) = 1;
6200 /* Make the function `inline' so that it is only emitted if it is
6201 actually needed. It is unlikely that it will be inlined, since
6202 it is only called via a function pointer, but we avoid unnecessary
6203 emissions this way. */
6204 DECL_DECLARED_INLINE_P (fndecl) = 1;
6205 DECL_INTERFACE_KNOWN (fndecl) = 1;
6206 /* Build the parameter. */
6211 parmdecl = cp_build_parm_decl (NULL_TREE, ptr_type_node);
6212 DECL_CONTEXT (parmdecl) = fndecl;
6213 TREE_USED (parmdecl) = 1;
6214 DECL_READ_P (parmdecl) = 1;
6215 DECL_ARGUMENTS (fndecl) = parmdecl;
6219 start_preparsed_function (fndecl, NULL_TREE, SF_PRE_PARSED);
6221 pop_lang_context ();
6223 return current_function_decl;
6226 /* Finish the cleanup function begun by start_cleanup_fn. */
6229 end_cleanup_fn (void)
6231 expand_or_defer_fn (finish_function (0));
6233 pop_from_top_level ();
6236 /* Generate code to handle the destruction of DECL, an object with
6237 static storage duration. */
6240 register_dtor_fn (tree decl)
6249 type = TREE_TYPE (decl);
6250 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (type))
6251 return void_zero_node;
6253 /* If we're using "__cxa_atexit" (or "__aeabi_atexit"), and DECL is
6254 a class object, we can just pass the destructor to
6255 "__cxa_atexit"; we don't have to build a temporary function to do
6257 use_dtor = (flag_use_cxa_atexit
6258 && !targetm.cxx.use_atexit_for_cxa_atexit ()
6259 && CLASS_TYPE_P (type));
6264 /* Find the destructor. */
6265 idx = lookup_fnfields_1 (type, complete_dtor_identifier);
6266 gcc_assert (idx >= 0);
6267 cleanup = VEC_index (tree, CLASSTYPE_METHOD_VEC (type), idx);
6268 /* Make sure it is accessible. */
6269 perform_or_defer_access_check (TYPE_BINFO (type), cleanup, cleanup);
6273 /* Call build_cleanup before we enter the anonymous function so
6274 that any access checks will be done relative to the current
6275 scope, rather than the scope of the anonymous function. */
6276 build_cleanup (decl);
6278 /* Now start the function. */
6279 cleanup = start_cleanup_fn ();
6281 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
6282 to the original function, rather than the anonymous one. That
6283 will make the back end think that nested functions are in use,
6284 which causes confusion. */
6285 push_deferring_access_checks (dk_no_check);
6286 fcall = build_cleanup (decl);
6287 pop_deferring_access_checks ();
6289 /* Create the body of the anonymous function. */
6290 compound_stmt = begin_compound_stmt (BCS_FN_BODY);
6291 finish_expr_stmt (fcall);
6292 finish_compound_stmt (compound_stmt);
6296 /* Call atexit with the cleanup function. */
6297 mark_used (cleanup);
6298 cleanup = build_address (cleanup);
6299 if (flag_use_cxa_atexit && !targetm.cxx.use_atexit_for_cxa_atexit ())
6305 /* We must convert CLEANUP to the type that "__cxa_atexit"
6307 cleanup = build_nop (get_atexit_fn_ptr_type (), cleanup);
6308 /* "__cxa_atexit" will pass the address of DECL to the
6309 cleanup function. */
6311 addr = build_address (decl);
6312 /* The declared type of the parameter to "__cxa_atexit" is
6313 "void *". For plain "T*", we could just let the
6314 machinery in cp_build_function_call convert it -- but if the
6315 type is "cv-qualified T *", then we need to convert it
6316 before passing it in, to avoid spurious errors. */
6317 addr = build_nop (ptr_type_node, addr);
6320 /* Since the cleanup functions we build ignore the address
6321 they're given, there's no reason to pass the actual address
6322 in, and, in general, it's cheaper to pass NULL than any
6324 addr = null_pointer_node;
6325 args = tree_cons (NULL_TREE,
6326 cp_build_unary_op (ADDR_EXPR, get_dso_handle_node (), 0,
6327 tf_warning_or_error),
6329 if (targetm.cxx.use_aeabi_atexit ())
6331 args = tree_cons (NULL_TREE, cleanup, args);
6332 args = tree_cons (NULL_TREE, addr, args);
6336 args = tree_cons (NULL_TREE, addr, args);
6337 args = tree_cons (NULL_TREE, cleanup, args);
6341 args = tree_cons (NULL_TREE, cleanup, NULL_TREE);
6342 return cp_build_function_call (get_atexit_node (), args,
6343 tf_warning_or_error);
6346 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
6347 is its initializer. Generate code to handle the construction
6348 and destruction of DECL. */
6351 expand_static_init (tree decl, tree init)
6353 gcc_assert (TREE_CODE (decl) == VAR_DECL);
6354 gcc_assert (TREE_STATIC (decl));
6356 /* Some variables require no initialization. */
6358 && !TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl))
6359 && TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
6362 if (DECL_FUNCTION_SCOPE_P (decl))
6364 /* Emit code to perform this initialization but once. */
6365 tree if_stmt = NULL_TREE, inner_if_stmt = NULL_TREE;
6366 tree then_clause = NULL_TREE, inner_then_clause = NULL_TREE;
6367 tree guard, guard_addr;
6368 tree acquire_fn, release_fn, abort_fn;
6371 /* Emit code to perform this initialization but once. This code
6374 static <type> guard;
6375 if (!guard.first_byte) {
6376 if (__cxa_guard_acquire (&guard)) {
6379 // Do initialization.
6380 flag = true; __cxa_guard_release (&guard);
6381 // Register variable for destruction at end of program.
6383 if (!flag) __cxa_guard_abort (&guard);
6387 Note that the `flag' variable is only set to 1 *after* the
6388 initialization is complete. This ensures that an exception,
6389 thrown during the construction, will cause the variable to
6390 reinitialized when we pass through this code again, as per:
6394 If the initialization exits by throwing an exception, the
6395 initialization is not complete, so it will be tried again
6396 the next time control enters the declaration.
6398 This process should be thread-safe, too; multiple threads
6399 should not be able to initialize the variable more than
6402 /* Create the guard variable. */
6403 guard = get_guard (decl);
6405 /* This optimization isn't safe on targets with relaxed memory
6406 consistency. On such targets we force synchronization in
6407 __cxa_guard_acquire. */
6408 if (!targetm.relaxed_ordering || !flag_threadsafe_statics)
6410 /* Begin the conditional initialization. */
6411 if_stmt = begin_if_stmt ();
6412 finish_if_stmt_cond (get_guard_cond (guard), if_stmt);
6413 then_clause = begin_compound_stmt (BCS_NO_SCOPE);
6416 if (flag_threadsafe_statics)
6418 guard_addr = build_address (guard);
6420 acquire_fn = get_identifier ("__cxa_guard_acquire");
6421 release_fn = get_identifier ("__cxa_guard_release");
6422 abort_fn = get_identifier ("__cxa_guard_abort");
6423 if (!get_global_value_if_present (acquire_fn, &acquire_fn))
6425 tree argtypes = tree_cons (NULL_TREE, TREE_TYPE (guard_addr),
6427 tree vfntype = build_function_type (void_type_node, argtypes);
6428 acquire_fn = push_library_fn
6429 (acquire_fn, build_function_type (integer_type_node, argtypes),
6431 release_fn = push_library_fn (release_fn, vfntype, NULL_TREE);
6432 abort_fn = push_library_fn (abort_fn, vfntype, NULL_TREE);
6436 release_fn = identifier_global_value (release_fn);
6437 abort_fn = identifier_global_value (abort_fn);
6440 inner_if_stmt = begin_if_stmt ();
6441 finish_if_stmt_cond (build_call_n (acquire_fn, 1, guard_addr),
6444 inner_then_clause = begin_compound_stmt (BCS_NO_SCOPE);
6445 begin = get_target_expr (boolean_false_node);
6446 flag = TARGET_EXPR_SLOT (begin);
6448 TARGET_EXPR_CLEANUP (begin)
6449 = build3 (COND_EXPR, void_type_node, flag,
6451 build_call_n (abort_fn, 1, guard_addr));
6452 CLEANUP_EH_ONLY (begin) = 1;
6454 /* Do the initialization itself. */
6455 init = add_stmt_to_compound (begin, init);
6456 init = add_stmt_to_compound
6457 (init, build2 (MODIFY_EXPR, void_type_node, flag, boolean_true_node));
6458 init = add_stmt_to_compound
6459 (init, build_call_n (release_fn, 1, guard_addr));
6462 init = add_stmt_to_compound (init, set_guard (guard));
6464 /* Use atexit to register a function for destroying this static
6466 init = add_stmt_to_compound (init, register_dtor_fn (decl));
6468 finish_expr_stmt (init);
6470 if (flag_threadsafe_statics)
6472 finish_compound_stmt (inner_then_clause);
6473 finish_then_clause (inner_if_stmt);
6474 finish_if_stmt (inner_if_stmt);
6477 if (!targetm.relaxed_ordering || !flag_threadsafe_statics)
6479 finish_compound_stmt (then_clause);
6480 finish_then_clause (if_stmt);
6481 finish_if_stmt (if_stmt);
6485 static_aggregates = tree_cons (init, decl, static_aggregates);
6489 /* Make TYPE a complete type based on INITIAL_VALUE.
6490 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
6491 2 if there was no information (in which case assume 0 if DO_DEFAULT),
6492 3 if the initializer list is empty (in pedantic mode). */
6495 cp_complete_array_type (tree *ptype, tree initial_value, bool do_default)
6498 tree type, elt_type;
6502 unsigned HOST_WIDE_INT i;
6505 /* An array of character type can be initialized from a
6506 brace-enclosed string constant.
6508 FIXME: this code is duplicated from reshape_init. Probably
6509 we should just call reshape_init here? */
6510 if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (*ptype)))
6511 && TREE_CODE (initial_value) == CONSTRUCTOR
6512 && !VEC_empty (constructor_elt, CONSTRUCTOR_ELTS (initial_value)))
6514 VEC(constructor_elt,gc) *v = CONSTRUCTOR_ELTS (initial_value);
6515 tree value = VEC_index (constructor_elt, v, 0)->value;
6517 if (TREE_CODE (value) == STRING_CST
6518 && VEC_length (constructor_elt, v) == 1)
6519 initial_value = value;
6522 /* If any of the elements are parameter packs, we can't actually
6523 complete this type now because the array size is dependent. */
6524 if (TREE_CODE (initial_value) == CONSTRUCTOR)
6526 FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (initial_value),
6529 if (PACK_EXPANSION_P (value))
6535 failure = complete_array_type (ptype, initial_value, do_default);
6537 /* We can create the array before the element type is complete, which
6538 means that we didn't have these two bits set in the original type
6539 either. In completing the type, we are expected to propagate these
6540 bits. See also complete_type which does the same thing for arrays
6543 if (TYPE_DOMAIN (type))
6545 elt_type = TREE_TYPE (type);
6546 TYPE_NEEDS_CONSTRUCTING (type) = TYPE_NEEDS_CONSTRUCTING (elt_type);
6547 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type)
6548 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (elt_type);
6554 /* Return zero if something is declared to be a member of type
6555 CTYPE when in the context of CUR_TYPE. STRING is the error
6556 message to print in that case. Otherwise, quietly return 1. */
6559 member_function_or_else (tree ctype, tree cur_type, enum overload_flags flags)
6561 if (ctype && ctype != cur_type)
6563 if (flags == DTOR_FLAG)
6564 error ("destructor for alien class %qT cannot be a member", ctype);
6566 error ("constructor for alien class %qT cannot be a member", ctype);
6572 /* Subroutine of `grokdeclarator'. */
6574 /* Generate errors possibly applicable for a given set of specifiers.
6575 This is for ARM $7.1.2. */
6578 bad_specifiers (tree object,
6587 error ("%qD declared as a %<virtual%> %s", object, type);
6589 error ("%qD declared as an %<inline%> %s", object, type);
6591 error ("%<const%> and %<volatile%> function specifiers on "
6592 "%qD invalid in %s declaration",
6595 error ("%q+D declared as a friend", object);
6597 && (TREE_CODE (object) == TYPE_DECL
6598 || (!TYPE_PTRFN_P (TREE_TYPE (object))
6599 && !TYPE_REFFN_P (TREE_TYPE (object))
6600 && !TYPE_PTRMEMFUNC_P (TREE_TYPE (object)))))
6601 error ("%q+D declared with an exception specification", object);
6604 /* DECL is a member function or static data member and is presently
6605 being defined. Check that the definition is taking place in a
6609 check_class_member_definition_namespace (tree decl)
6611 /* These checks only apply to member functions and static data
6613 gcc_assert (TREE_CODE (decl) == FUNCTION_DECL
6614 || TREE_CODE (decl) == VAR_DECL);
6615 /* We check for problems with specializations in pt.c in
6616 check_specialization_namespace, where we can issue better
6618 if (processing_specialization)
6620 /* There are no restrictions on the placement of
6621 explicit instantiations. */
6622 if (processing_explicit_instantiation)
6626 A member function definition that appears outside of the
6627 class definition shall appear in a namespace scope enclosing
6628 the class definition.
6632 The definition for a static data member shall appear in a
6633 namespace scope enclosing the member's class definition. */
6634 if (!is_ancestor (current_namespace, DECL_CONTEXT (decl)))
6635 permerror (input_location, "definition of %qD is not in namespace enclosing %qT",
6636 decl, DECL_CONTEXT (decl));
6639 /* Build a PARM_DECL for the "this" parameter. TYPE is the
6640 METHOD_TYPE for a non-static member function; QUALS are the
6641 cv-qualifiers that apply to the function. */
6644 build_this_parm (tree type, cp_cv_quals quals)
6649 cp_cv_quals this_quals;
6651 this_type = TREE_VALUE (TYPE_ARG_TYPES (type));
6652 /* The `this' parameter is implicitly `const'; it cannot be
6654 this_quals = (quals & TYPE_QUAL_RESTRICT) | TYPE_QUAL_CONST;
6655 qual_type = cp_build_qualified_type (this_type, this_quals);
6656 parm = build_artificial_parm (this_identifier, qual_type);
6657 cp_apply_type_quals_to_decl (this_quals, parm);
6661 /* CTYPE is class type, or null if non-class.
6662 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
6664 DECLARATOR is the function's name.
6665 PARMS is a chain of PARM_DECLs for the function.
6666 VIRTUALP is truthvalue of whether the function is virtual or not.
6667 FLAGS are to be passed through to `grokclassfn'.
6668 QUALS are qualifiers indicating whether the function is `const'
6670 RAISES is a list of exceptions that this function can raise.
6671 CHECK is 1 if we must find this method in CTYPE, 0 if we should
6672 not look, and -1 if we should not call `grokclassfn' at all.
6674 SFK is the kind of special function (if any) for the new function.
6676 Returns `NULL_TREE' if something goes wrong, after issuing
6677 applicable error messages. */
6680 grokfndecl (tree ctype,
6684 tree orig_declarator,
6686 enum overload_flags flags,
6693 special_function_kind sfk,
6698 location_t location)
6701 int staticp = ctype && TREE_CODE (type) == FUNCTION_TYPE;
6705 type = build_exception_variant (type, raises);
6707 decl = build_lang_decl (FUNCTION_DECL, declarator, type);
6709 /* If we have an explicit location, use it, otherwise use whatever
6710 build_lang_decl used (probably input_location). */
6711 if (location != UNKNOWN_LOCATION)
6712 DECL_SOURCE_LOCATION (decl) = location;
6714 if (TREE_CODE (type) == METHOD_TYPE)
6717 parm = build_this_parm (type, quals);
6718 TREE_CHAIN (parm) = parms;
6721 DECL_ARGUMENTS (decl) = parms;
6722 for (t = parms; t; t = TREE_CHAIN (t))
6723 DECL_CONTEXT (t) = decl;
6724 /* Propagate volatile out from type to decl. */
6725 if (TYPE_VOLATILE (type))
6726 TREE_THIS_VOLATILE (decl) = 1;
6728 /* Setup decl according to sfk. */
6731 case sfk_constructor:
6732 case sfk_copy_constructor:
6733 case sfk_move_constructor:
6734 DECL_CONSTRUCTOR_P (decl) = 1;
6736 case sfk_destructor:
6737 DECL_DESTRUCTOR_P (decl) = 1;
6743 /* If pointers to member functions use the least significant bit to
6744 indicate whether a function is virtual, ensure a pointer
6745 to this function will have that bit clear. */
6746 if (TARGET_PTRMEMFUNC_VBIT_LOCATION == ptrmemfunc_vbit_in_pfn
6747 && TREE_CODE (type) == METHOD_TYPE
6748 && DECL_ALIGN (decl) < 2 * BITS_PER_UNIT)
6749 DECL_ALIGN (decl) = 2 * BITS_PER_UNIT;
6752 && TREE_CODE (orig_declarator) == TEMPLATE_ID_EXPR)
6756 ("defining explicit specialization %qD in friend declaration",
6760 tree fns = TREE_OPERAND (orig_declarator, 0);
6761 tree args = TREE_OPERAND (orig_declarator, 1);
6763 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
6765 /* Something like `template <class T> friend void f<T>()'. */
6766 error ("invalid use of template-id %qD in declaration "
6767 "of primary template",
6773 /* A friend declaration of the form friend void f<>(). Record
6774 the information in the TEMPLATE_ID_EXPR. */
6775 SET_DECL_IMPLICIT_INSTANTIATION (decl);
6777 if (TREE_CODE (fns) == COMPONENT_REF)
6779 /* Due to bison parser ickiness, we will have already looked
6780 up an operator_name or PFUNCNAME within the current class
6781 (see template_id in parse.y). If the current class contains
6782 such a name, we'll get a COMPONENT_REF here. Undo that. */
6784 gcc_assert (TREE_TYPE (TREE_OPERAND (fns, 0))
6785 == current_class_type);
6786 fns = TREE_OPERAND (fns, 1);
6788 gcc_assert (TREE_CODE (fns) == IDENTIFIER_NODE
6789 || TREE_CODE (fns) == OVERLOAD);
6790 DECL_TEMPLATE_INFO (decl) = build_template_info (fns, args);
6792 for (t = TYPE_ARG_TYPES (TREE_TYPE (decl)); t; t = TREE_CHAIN (t))
6793 if (TREE_PURPOSE (t)
6794 && TREE_CODE (TREE_PURPOSE (t)) == DEFAULT_ARG)
6796 error ("default arguments are not allowed in declaration "
6797 "of friend template specialization %qD",
6804 error ("%<inline%> is not allowed in declaration of friend "
6805 "template specialization %qD",
6812 /* If this decl has namespace scope, set that up. */
6814 set_decl_namespace (decl, in_namespace, friendp);
6816 DECL_CONTEXT (decl) = FROB_CONTEXT (current_decl_namespace ());
6818 /* `main' and builtins have implicit 'C' linkage. */
6819 if ((MAIN_NAME_P (declarator)
6820 || (IDENTIFIER_LENGTH (declarator) > 10
6821 && IDENTIFIER_POINTER (declarator)[0] == '_'
6822 && IDENTIFIER_POINTER (declarator)[1] == '_'
6823 && strncmp (IDENTIFIER_POINTER (declarator)+2, "builtin_", 8) == 0))
6824 && current_lang_name == lang_name_cplusplus
6825 && ctype == NULL_TREE
6826 /* NULL_TREE means global namespace. */
6827 && DECL_CONTEXT (decl) == NULL_TREE)
6828 SET_DECL_LANGUAGE (decl, lang_c);
6830 /* Should probably propagate const out from type to decl I bet (mrs). */
6833 DECL_STATIC_FUNCTION_P (decl) = 1;
6834 DECL_CONTEXT (decl) = ctype;
6839 DECL_CONTEXT (decl) = ctype;
6841 check_class_member_definition_namespace (decl);
6844 if (ctype == NULL_TREE && DECL_MAIN_P (decl))
6846 if (processing_template_decl)
6847 error ("cannot declare %<::main%> to be a template");
6849 error ("cannot declare %<::main%> to be inline");
6851 error ("cannot declare %<::main%> to be static");
6856 /* Members of anonymous types and local classes have no linkage; make
6857 them internal. If a typedef is made later, this will be changed. */
6858 if (ctype && (TYPE_ANONYMOUS_P (ctype)
6859 || decl_function_context (TYPE_MAIN_DECL (ctype))))
6862 if (publicp && cxx_dialect == cxx98)
6864 /* [basic.link]: A name with no linkage (notably, the name of a class
6865 or enumeration declared in a local scope) shall not be used to
6866 declare an entity with linkage.
6868 DR 757 relaxes this restriction for C++0x. */
6869 t = no_linkage_check (TREE_TYPE (decl),
6870 /*relaxed_p=*/false);
6873 if (TYPE_ANONYMOUS_P (t))
6875 if (DECL_EXTERN_C_P (decl))
6876 /* Allow this; it's pretty common in C. */;
6879 permerror (input_location, "anonymous type with no linkage "
6880 "used to declare function %q#D with linkage",
6882 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
6883 permerror (input_location, "%q+#D does not refer to the unqualified "
6884 "type, so it is not used for linkage",
6889 permerror (input_location, "type %qT with no linkage used to "
6890 "declare function %q#D with linkage", t, decl);
6894 TREE_PUBLIC (decl) = publicp;
6897 DECL_INTERFACE_KNOWN (decl) = 1;
6898 DECL_NOT_REALLY_EXTERN (decl) = 1;
6901 /* If the declaration was declared inline, mark it as such. */
6903 DECL_DECLARED_INLINE_P (decl) = 1;
6905 DECL_EXTERNAL (decl) = 1;
6906 if (quals && TREE_CODE (type) == FUNCTION_TYPE)
6909 ? G_("static member function %qD cannot have cv-qualifier")
6910 : G_("non-member function %qD cannot have cv-qualifier"),
6912 quals = TYPE_UNQUALIFIED;
6915 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl))
6916 && !grok_op_properties (decl, /*complain=*/true))
6920 /* Make the init_value nonzero so pushdecl knows this is not
6921 tentative. error_mark_node is replaced later with the BLOCK. */
6922 DECL_INITIAL (decl) = error_mark_node;
6924 if (TYPE_NOTHROW_P (type) || nothrow_libfn_p (decl))
6925 TREE_NOTHROW (decl) = 1;
6927 /* Caller will do the rest of this. */
6931 if (ctype != NULL_TREE)
6932 grokclassfn (ctype, decl, flags);
6934 decl = check_explicit_specialization (orig_declarator, decl,
6937 4 * (friendp != 0));
6938 if (decl == error_mark_node)
6943 cplus_decl_attributes (&decl, *attrlist, 0);
6944 *attrlist = NULL_TREE;
6947 /* Check main's type after attributes have been applied. */
6948 if (ctype == NULL_TREE && DECL_MAIN_P (decl))
6950 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl)),
6953 tree oldtypeargs = TYPE_ARG_TYPES (TREE_TYPE (decl));
6955 error ("%<::main%> must return %<int%>");
6956 newtype = build_function_type (integer_type_node, oldtypeargs);
6957 TREE_TYPE (decl) = newtype;
6960 check_main_parameter_types (decl);
6963 if (ctype != NULL_TREE
6964 && (! TYPE_FOR_JAVA (ctype) || check_java_method (decl))
6967 tree old_decl = check_classfn (ctype, decl,
6968 (processing_template_decl
6969 > template_class_depth (ctype))
6970 ? current_template_parms
6973 if (old_decl == error_mark_node)
6981 if (TREE_CODE (old_decl) == TEMPLATE_DECL)
6982 /* Because grokfndecl is always supposed to return a
6983 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
6984 here. We depend on our callers to figure out that its
6985 really a template that's being returned. */
6986 old_decl = DECL_TEMPLATE_RESULT (old_decl);
6988 if (DECL_STATIC_FUNCTION_P (old_decl)
6989 && TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE)
6990 /* Remove the `this' parm added by grokclassfn.
6991 XXX Isn't this done in start_function, too? */
6992 revert_static_member_fn (decl);
6993 if (DECL_ARTIFICIAL (old_decl))
6995 error ("definition of implicitly-declared %qD", old_decl);
6999 /* Since we've smashed OLD_DECL to its
7000 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
7001 if (TREE_CODE (decl) == TEMPLATE_DECL)
7002 decl = DECL_TEMPLATE_RESULT (decl);
7004 /* Attempt to merge the declarations. This can fail, in
7005 the case of some invalid specialization declarations. */
7006 pushed_scope = push_scope (ctype);
7007 ok = duplicate_decls (decl, old_decl, friendp);
7009 pop_scope (pushed_scope);
7012 error ("no %q#D member function declared in class %qT",
7020 if (DECL_CONSTRUCTOR_P (decl) && !grok_ctor_properties (ctype, decl))
7023 if (ctype == NULL_TREE || check)
7027 DECL_VIRTUAL_P (decl) = 1;
7032 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
7033 the linkage that DECL will receive in the object file. */
7036 set_linkage_for_static_data_member (tree decl)
7038 /* A static data member always has static storage duration and
7039 external linkage. Note that static data members are forbidden in
7040 local classes -- the only situation in which a class has
7041 non-external linkage. */
7042 TREE_PUBLIC (decl) = 1;
7043 TREE_STATIC (decl) = 1;
7044 /* For non-template classes, static data members are always put
7045 out in exactly those files where they are defined, just as
7046 with ordinary namespace-scope variables. */
7047 if (!processing_template_decl)
7048 DECL_INTERFACE_KNOWN (decl) = 1;
7051 /* Create a VAR_DECL named NAME with the indicated TYPE.
7053 If SCOPE is non-NULL, it is the class type or namespace containing
7054 the variable. If SCOPE is NULL, the variable should is created in
7055 the innermost enclosings scope. */
7058 grokvardecl (tree type,
7060 const cp_decl_specifier_seq *declspecs,
7066 tree explicit_scope;
7068 gcc_assert (!name || TREE_CODE (name) == IDENTIFIER_NODE);
7070 /* Compute the scope in which to place the variable, but remember
7071 whether or not that scope was explicitly specified by the user. */
7072 explicit_scope = scope;
7075 /* An explicit "extern" specifier indicates a namespace-scope
7077 if (declspecs->storage_class == sc_extern)
7078 scope = current_decl_namespace ();
7079 else if (!at_function_scope_p ())
7080 scope = current_scope ();
7084 && (/* If the variable is a namespace-scope variable declared in a
7085 template, we need DECL_LANG_SPECIFIC. */
7086 (TREE_CODE (scope) == NAMESPACE_DECL && processing_template_decl)
7087 /* Similarly for namespace-scope variables with language linkage
7089 || (TREE_CODE (scope) == NAMESPACE_DECL
7090 && current_lang_name != lang_name_cplusplus)
7091 /* Similarly for static data members. */
7093 decl = build_lang_decl (VAR_DECL, name, type);
7095 decl = build_decl (input_location, VAR_DECL, name, type);
7097 if (explicit_scope && TREE_CODE (explicit_scope) == NAMESPACE_DECL)
7098 set_decl_namespace (decl, explicit_scope, 0);
7100 DECL_CONTEXT (decl) = FROB_CONTEXT (scope);
7102 if (declspecs->storage_class == sc_extern)
7104 DECL_THIS_EXTERN (decl) = 1;
7105 DECL_EXTERNAL (decl) = !initialized;
7108 if (DECL_CLASS_SCOPE_P (decl))
7110 set_linkage_for_static_data_member (decl);
7111 /* This function is only called with out-of-class definitions. */
7112 DECL_EXTERNAL (decl) = 0;
7113 check_class_member_definition_namespace (decl);
7115 /* At top level, either `static' or no s.c. makes a definition
7116 (perhaps tentative), and absence of `static' makes it public. */
7117 else if (toplevel_bindings_p ())
7119 TREE_PUBLIC (decl) = (declspecs->storage_class != sc_static
7120 && (DECL_THIS_EXTERN (decl) || ! constp));
7121 TREE_STATIC (decl) = ! DECL_EXTERNAL (decl);
7123 /* Not at top level, only `static' makes a static definition. */
7126 TREE_STATIC (decl) = declspecs->storage_class == sc_static;
7127 TREE_PUBLIC (decl) = DECL_EXTERNAL (decl);
7130 if (declspecs->specs[(int)ds_thread])
7131 DECL_TLS_MODEL (decl) = decl_default_tls_model (decl);
7133 /* If the type of the decl has no linkage, make sure that we'll
7134 notice that in mark_used. */
7135 if (cxx_dialect > cxx98
7136 && decl_linkage (decl) != lk_none
7137 && DECL_LANG_SPECIFIC (decl) == NULL
7138 && !DECL_EXTERN_C_P (decl)
7139 && no_linkage_check (TREE_TYPE (decl), /*relaxed_p=*/false))
7140 retrofit_lang_decl (decl);
7142 if (TREE_PUBLIC (decl))
7144 /* [basic.link]: A name with no linkage (notably, the name of a class
7145 or enumeration declared in a local scope) shall not be used to
7146 declare an entity with linkage.
7148 DR 757 relaxes this restriction for C++0x. */
7149 tree t = (cxx_dialect > cxx98 ? NULL_TREE
7150 : no_linkage_check (TREE_TYPE (decl), /*relaxed_p=*/false));
7153 if (TYPE_ANONYMOUS_P (t))
7155 if (DECL_EXTERN_C_P (decl))
7156 /* Allow this; it's pretty common in C. */
7160 /* DRs 132, 319 and 389 seem to indicate types with
7161 no linkage can only be used to declare extern "C"
7162 entities. Since it's not always an error in the
7163 ISO C++ 90 Standard, we only issue a warning. */
7164 warning (0, "anonymous type with no linkage used to declare "
7165 "variable %q#D with linkage", decl);
7166 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
7167 warning (0, "%q+#D does not refer to the unqualified "
7168 "type, so it is not used for linkage",
7173 warning (0, "type %qT with no linkage used to declare variable "
7174 "%q#D with linkage", t, decl);
7178 DECL_INTERFACE_KNOWN (decl) = 1;
7183 /* Create and return a canonical pointer to member function type, for
7184 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
7187 build_ptrmemfunc_type (tree type)
7191 tree unqualified_variant = NULL_TREE;
7193 if (type == error_mark_node)
7196 /* If a canonical type already exists for this type, use it. We use
7197 this method instead of type_hash_canon, because it only does a
7198 simple equality check on the list of field members. */
7200 if ((t = TYPE_GET_PTRMEMFUNC_TYPE (type)))
7203 /* Make sure that we always have the unqualified pointer-to-member
7205 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
7207 = build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type));
7209 t = make_class_type (RECORD_TYPE);
7210 xref_basetypes (t, NULL_TREE);
7212 /* Let the front end know this is a pointer to member function... */
7213 TYPE_PTRMEMFUNC_FLAG (t) = 1;
7214 /* ... and not really a class type. */
7215 SET_CLASS_TYPE_P (t, 0);
7217 field = build_decl (input_location, FIELD_DECL, pfn_identifier, type);
7220 field = build_decl (input_location, FIELD_DECL, delta_identifier,
7222 TREE_CHAIN (field) = fields;
7225 finish_builtin_struct (t, "__ptrmemfunc_type", fields, ptr_type_node);
7227 /* Zap out the name so that the back end will give us the debugging
7228 information for this anonymous RECORD_TYPE. */
7229 TYPE_NAME (t) = NULL_TREE;
7231 /* If this is not the unqualified form of this pointer-to-member
7232 type, set the TYPE_MAIN_VARIANT for this type to be the
7233 unqualified type. Since they are actually RECORD_TYPEs that are
7234 not variants of each other, we must do this manually.
7235 As we just built a new type there is no need to do yet another copy. */
7236 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
7238 int type_quals = cp_type_quals (type);
7239 TYPE_READONLY (t) = (type_quals & TYPE_QUAL_CONST) != 0;
7240 TYPE_VOLATILE (t) = (type_quals & TYPE_QUAL_VOLATILE) != 0;
7241 TYPE_RESTRICT (t) = (type_quals & TYPE_QUAL_RESTRICT) != 0;
7242 TYPE_MAIN_VARIANT (t) = unqualified_variant;
7243 TYPE_NEXT_VARIANT (t) = TYPE_NEXT_VARIANT (unqualified_variant);
7244 TYPE_NEXT_VARIANT (unqualified_variant) = t;
7245 TREE_TYPE (TYPE_BINFO (t)) = t;
7248 /* Cache this pointer-to-member type so that we can find it again
7250 TYPE_SET_PTRMEMFUNC_TYPE (type, t);
7252 if (TYPE_STRUCTURAL_EQUALITY_P (type))
7253 SET_TYPE_STRUCTURAL_EQUALITY (t);
7254 else if (TYPE_CANONICAL (type) != type)
7255 TYPE_CANONICAL (t) = build_ptrmemfunc_type (TYPE_CANONICAL (type));
7260 /* Create and return a pointer to data member type. */
7263 build_ptrmem_type (tree class_type, tree member_type)
7265 if (TREE_CODE (member_type) == METHOD_TYPE)
7267 cp_cv_quals quals = type_memfn_quals (member_type);
7268 member_type = build_memfn_type (member_type, class_type, quals);
7269 return build_ptrmemfunc_type (build_pointer_type (member_type));
7273 gcc_assert (TREE_CODE (member_type) != FUNCTION_TYPE);
7274 return build_offset_type (class_type, member_type);
7278 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
7279 Check to see that the definition is valid. Issue appropriate error
7280 messages. Return 1 if the definition is particularly bad, or 0
7284 check_static_variable_definition (tree decl, tree type)
7286 /* Motion 10 at San Diego: If a static const integral data member is
7287 initialized with an integral constant expression, the initializer
7288 may appear either in the declaration (within the class), or in
7289 the definition, but not both. If it appears in the class, the
7290 member is a member constant. The file-scope definition is always
7292 if (!ARITHMETIC_TYPE_P (type) && TREE_CODE (type) != ENUMERAL_TYPE)
7294 error ("invalid in-class initialization of static data member "
7295 "of non-integral type %qT",
7297 /* If we just return the declaration, crashes will sometimes
7298 occur. We therefore return void_type_node, as if this were a
7299 friend declaration, to cause callers to completely ignore
7300 this declaration. */
7303 else if (!CP_TYPE_CONST_P (type))
7304 error ("ISO C++ forbids in-class initialization of non-const "
7305 "static member %qD",
7307 else if (!INTEGRAL_OR_ENUMERATION_TYPE_P (type))
7308 pedwarn (input_location, OPT_pedantic, "ISO C++ forbids initialization of member constant "
7309 "%qD of non-integral type %qT", decl, type);
7314 /* Given the SIZE (i.e., number of elements) in an array, compute an
7315 appropriate index type for the array. If non-NULL, NAME is the
7316 name of the thing being declared. */
7319 compute_array_index_type (tree name, tree size)
7323 tree abi_1_itype = NULL_TREE;
7325 if (error_operand_p (size))
7326 return error_mark_node;
7328 type = TREE_TYPE (size);
7329 /* The array bound must be an integer type. */
7330 if (!dependent_type_p (type) && !INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type))
7333 error ("size of array %qD has non-integral type %qT", name, type);
7335 error ("size of array has non-integral type %qT", type);
7336 size = integer_one_node;
7337 type = TREE_TYPE (size);
7340 /* We can only call value_dependent_expression_p on integral constant
7341 expressions; the parser adds a dummy NOP_EXPR with TREE_SIDE_EFFECTS
7342 set if this isn't one. */
7343 if (processing_template_decl
7344 && (TREE_SIDE_EFFECTS (size) || value_dependent_expression_p (size)))
7346 /* We cannot do any checking for a SIZE that isn't known to be
7347 constant. Just build the index type and mark that it requires
7348 structural equality checks. */
7349 itype = build_index_type (build_min (MINUS_EXPR, sizetype,
7350 size, integer_one_node));
7351 TYPE_DEPENDENT_P (itype) = 1;
7352 TYPE_DEPENDENT_P_VALID (itype) = 1;
7353 SET_TYPE_STRUCTURAL_EQUALITY (itype);
7357 if (!abi_version_at_least (2) && processing_template_decl)
7358 /* For abi-1, we handled all instances in templates the same way,
7359 even when they were non-dependent. This affects the manglings
7360 produced. So, we do the normal checking for non-dependent
7361 sizes, but at the end we'll return the same type that abi-1
7362 would have, but with TYPE_CANONICAL set to the "right"
7363 value that the current ABI would provide. */
7364 abi_1_itype = build_index_type (build_min (MINUS_EXPR, sizetype,
7365 size, integer_one_node));
7367 /* The size might be the result of a cast. */
7368 STRIP_TYPE_NOPS (size);
7370 size = mark_rvalue_use (size);
7372 /* It might be a const variable or enumeration constant. */
7373 size = integral_constant_value (size);
7374 if (error_operand_p (size))
7375 return error_mark_node;
7377 /* Normally, the array-bound will be a constant. */
7378 if (TREE_CODE (size) == INTEGER_CST)
7380 /* Check to see if the array bound overflowed. Make that an
7381 error, no matter how generous we're being. */
7382 constant_expression_error (size);
7384 /* An array must have a positive number of elements. */
7385 if (INT_CST_LT (size, integer_zero_node))
7388 error ("size of array %qD is negative", name);
7390 error ("size of array is negative");
7391 size = integer_one_node;
7393 /* As an extension we allow zero-sized arrays. We always allow
7394 them in system headers because glibc uses them. */
7395 else if (integer_zerop (size) && !in_system_header)
7398 pedwarn (input_location, OPT_pedantic, "ISO C++ forbids zero-size array %qD", name);
7400 pedwarn (input_location, OPT_pedantic, "ISO C++ forbids zero-size array");
7403 else if (TREE_CONSTANT (size))
7405 /* `(int) &fn' is not a valid array bound. */
7407 error ("size of array %qD is not an integral constant-expression",
7410 error ("size of array is not an integral constant-expression");
7411 size = integer_one_node;
7413 else if (pedantic && warn_vla != 0)
7416 pedwarn (input_location, OPT_Wvla, "ISO C++ forbids variable length array %qD", name);
7418 pedwarn (input_location, OPT_Wvla, "ISO C++ forbids variable length array");
7420 else if (warn_vla > 0)
7424 "variable length array %qD is used", name);
7427 "variable length array is used");
7430 if (processing_template_decl && !TREE_CONSTANT (size))
7431 /* A variable sized array. */
7432 itype = build_min (MINUS_EXPR, sizetype, size, integer_one_node);
7435 HOST_WIDE_INT saved_processing_template_decl;
7437 /* Compute the index of the largest element in the array. It is
7438 one less than the number of elements in the array. We save
7439 and restore PROCESSING_TEMPLATE_DECL so that computations in
7440 cp_build_binary_op will be appropriately folded. */
7441 saved_processing_template_decl = processing_template_decl;
7442 processing_template_decl = 0;
7443 itype = cp_build_binary_op (input_location,
7445 cp_convert (ssizetype, size),
7446 cp_convert (ssizetype, integer_one_node),
7447 tf_warning_or_error);
7448 itype = fold (itype);
7449 processing_template_decl = saved_processing_template_decl;
7451 if (!TREE_CONSTANT (itype))
7452 /* A variable sized array. */
7453 itype = variable_size (itype);
7454 /* Make sure that there was no overflow when creating to a signed
7455 index type. (For example, on a 32-bit machine, an array with
7456 size 2^32 - 1 is too big.) */
7457 else if (TREE_CODE (itype) == INTEGER_CST
7458 && TREE_OVERFLOW (itype))
7460 error ("overflow in array dimension");
7461 TREE_OVERFLOW (itype) = 0;
7465 /* Create and return the appropriate index type. */
7468 tree t = build_index_type (itype);
7469 TYPE_CANONICAL (abi_1_itype) = TYPE_CANONICAL (t);
7473 return build_index_type (itype);
7476 /* Returns the scope (if any) in which the entity declared by
7477 DECLARATOR will be located. If the entity was declared with an
7478 unqualified name, NULL_TREE is returned. */
7481 get_scope_of_declarator (const cp_declarator *declarator)
7483 while (declarator && declarator->kind != cdk_id)
7484 declarator = declarator->declarator;
7486 /* If the declarator-id is a SCOPE_REF, the scope in which the
7487 declaration occurs is the first operand. */
7489 && declarator->u.id.qualifying_scope)
7490 return declarator->u.id.qualifying_scope;
7492 /* Otherwise, the declarator is not a qualified name; the entity will
7493 be declared in the current scope. */
7497 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
7498 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
7502 create_array_type_for_decl (tree name, tree type, tree size)
7504 tree itype = NULL_TREE;
7506 /* If things have already gone awry, bail now. */
7507 if (type == error_mark_node || size == error_mark_node)
7508 return error_mark_node;
7510 /* If there are some types which cannot be array elements,
7511 issue an error-message and return. */
7512 switch (TREE_CODE (type))
7516 error ("declaration of %qD as array of void", name);
7518 error ("creating array of void");
7519 return error_mark_node;
7523 error ("declaration of %qD as array of functions", name);
7525 error ("creating array of functions");
7526 return error_mark_node;
7528 case REFERENCE_TYPE:
7530 error ("declaration of %qD as array of references", name);
7532 error ("creating array of references");
7533 return error_mark_node;
7537 error ("declaration of %qD as array of function members", name);
7539 error ("creating array of function members");
7540 return error_mark_node;
7548 The constant expressions that specify the bounds of the arrays
7549 can be omitted only for the first member of the sequence. */
7550 if (TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type))
7553 error ("declaration of %qD as multidimensional array must "
7554 "have bounds for all dimensions except the first",
7557 error ("multidimensional array must have bounds for all "
7558 "dimensions except the first");
7560 return error_mark_node;
7563 /* Figure out the index type for the array. */
7565 itype = compute_array_index_type (name, size);
7568 T is called the array element type; this type shall not be [...] an
7569 abstract class type. */
7570 abstract_virtuals_error (name, type);
7572 return build_cplus_array_type (type, itype);
7575 /* Check that it's OK to declare a function with the indicated TYPE.
7576 SFK indicates the kind of special function (if any) that this
7577 function is. OPTYPE is the type given in a conversion operator
7578 declaration, or the class type for a constructor/destructor.
7579 Returns the actual return type of the function; that
7580 may be different than TYPE if an error occurs, or for certain
7581 special functions. */
7584 check_special_function_return_type (special_function_kind sfk,
7590 case sfk_constructor:
7592 error ("return type specification for constructor invalid");
7594 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
7595 type = build_pointer_type (optype);
7597 type = void_type_node;
7600 case sfk_destructor:
7602 error ("return type specification for destructor invalid");
7603 /* We can't use the proper return type here because we run into
7604 problems with ambiguous bases and covariant returns.
7605 Java classes are left unchanged because (void *) isn't a valid
7606 Java type, and we don't want to change the Java ABI. */
7607 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
7608 type = build_pointer_type (void_type_node);
7610 type = void_type_node;
7613 case sfk_conversion:
7615 error ("return type specified for %<operator %T%>", optype);
7626 /* A variable or data member (whose unqualified name is IDENTIFIER)
7627 has been declared with the indicated TYPE. If the TYPE is not
7628 acceptable, issue an error message and return a type to use for
7629 error-recovery purposes. */
7632 check_var_type (tree identifier, tree type)
7634 if (VOID_TYPE_P (type))
7637 error ("unnamed variable or field declared void");
7638 else if (TREE_CODE (identifier) == IDENTIFIER_NODE)
7640 gcc_assert (!IDENTIFIER_OPNAME_P (identifier));
7641 error ("variable or field %qE declared void", identifier);
7644 error ("variable or field declared void");
7645 type = error_mark_node;
7651 /* Given declspecs and a declarator (abstract or otherwise), determine
7652 the name and type of the object declared and construct a DECL node
7655 DECLSPECS points to the representation of declaration-specifier
7656 sequence that precedes declarator.
7658 DECL_CONTEXT says which syntactic context this declaration is in:
7659 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
7660 FUNCDEF for a function definition. Like NORMAL but a few different
7661 error messages in each case. Return value may be zero meaning
7662 this definition is too screwy to try to parse.
7663 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
7664 handle member functions (which have FIELD context).
7665 Return value may be zero meaning this definition is too screwy to
7667 PARM for a parameter declaration (either within a function prototype
7668 or before a function body). Make a PARM_DECL, or return void_type_node.
7669 TPARM for a template parameter declaration.
7670 CATCHPARM for a parameter declaration before a catch clause.
7671 TYPENAME if for a typename (in a cast or sizeof).
7672 Don't make a DECL node; just return the ..._TYPE node.
7673 FIELD for a struct or union field; make a FIELD_DECL.
7674 BITFIELD for a field with specified width.
7676 INITIALIZED is as for start_decl.
7678 ATTRLIST is a pointer to the list of attributes, which may be NULL
7679 if there are none; *ATTRLIST may be modified if attributes from inside
7680 the declarator should be applied to the declaration.
7682 When this function is called, scoping variables (such as
7683 CURRENT_CLASS_TYPE) should reflect the scope in which the
7684 declaration occurs, not the scope in which the new declaration will
7685 be placed. For example, on:
7689 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
7692 Returns a DECL (if a declarator is present), a TYPE (if there is no
7693 declarator, in cases like "struct S;"), or the ERROR_MARK_NODE if an
7697 grokdeclarator (const cp_declarator *declarator,
7698 const cp_decl_specifier_seq *declspecs,
7699 enum decl_context decl_context,
7703 tree type = NULL_TREE;
7705 int virtualp, explicitp, friendp, inlinep, staticp;
7706 int explicit_int = 0;
7707 int explicit_char = 0;
7708 int defaulted_int = 0;
7709 tree dependent_name = NULL_TREE;
7711 tree typedef_decl = NULL_TREE;
7712 const char *name = NULL;
7713 tree typedef_type = NULL_TREE;
7714 /* True if this declarator is a function definition. */
7715 bool funcdef_flag = false;
7716 cp_declarator_kind innermost_code = cdk_error;
7719 /* See the code below that used this. */
7720 tree decl_attr = NULL_TREE;
7723 /* Keep track of what sort of function is being processed
7724 so that we can warn about default return values, or explicit
7725 return values which do not match prescribed defaults. */
7726 special_function_kind sfk = sfk_none;
7728 tree dname = NULL_TREE;
7729 tree ctor_return_type = NULL_TREE;
7730 enum overload_flags flags = NO_SPECIAL;
7731 /* cv-qualifiers that apply to the declarator, for a declaration of
7732 a member function. */
7733 cp_cv_quals memfn_quals = TYPE_UNQUALIFIED;
7734 /* cv-qualifiers that apply to the type specified by the DECLSPECS. */
7736 tree raises = NULL_TREE;
7737 int template_count = 0;
7738 tree returned_attrs = NULL_TREE;
7739 tree parms = NULL_TREE;
7740 const cp_declarator *id_declarator;
7741 /* The unqualified name of the declarator; either an
7742 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
7743 tree unqualified_id;
7744 /* The class type, if any, in which this entity is located,
7745 or NULL_TREE if none. Note that this value may be different from
7746 the current class type; for example if an attempt is made to declare
7747 "A::f" inside "B", this value will be "A". */
7748 tree ctype = current_class_type;
7749 /* The NAMESPACE_DECL for the namespace in which this entity is
7750 located. If an unqualified name is used to declare the entity,
7751 this value will be NULL_TREE, even if the entity is located at
7753 tree in_namespace = NULL_TREE;
7754 cp_storage_class storage_class;
7755 bool unsigned_p, signed_p, short_p, long_p, thread_p;
7756 bool type_was_error_mark_node = false;
7757 bool parameter_pack_p = declarator? declarator->parameter_pack_p : false;
7758 bool template_type_arg = false;
7759 bool template_parm_flag = false;
7760 bool constexpr_p = declspecs->specs[(int) ds_constexpr];
7763 signed_p = declspecs->specs[(int)ds_signed];
7764 unsigned_p = declspecs->specs[(int)ds_unsigned];
7765 short_p = declspecs->specs[(int)ds_short];
7766 long_p = declspecs->specs[(int)ds_long];
7767 longlong = declspecs->specs[(int)ds_long] >= 2;
7768 thread_p = declspecs->specs[(int)ds_thread];
7770 if (decl_context == FUNCDEF)
7771 funcdef_flag = true, decl_context = NORMAL;
7772 else if (decl_context == MEMFUNCDEF)
7773 funcdef_flag = true, decl_context = FIELD;
7774 else if (decl_context == BITFIELD)
7775 bitfield = 1, decl_context = FIELD;
7776 else if (decl_context == TEMPLATE_TYPE_ARG)
7777 template_type_arg = true, decl_context = TYPENAME;
7778 else if (decl_context == TPARM)
7779 template_parm_flag = true, decl_context = PARM;
7781 if (initialized > 1)
7782 funcdef_flag = true;
7784 /* Look inside a declarator for the name being declared
7785 and get it as a string, for an error message. */
7786 for (id_declarator = declarator;
7788 id_declarator = id_declarator->declarator)
7790 if (id_declarator->kind != cdk_id)
7791 innermost_code = id_declarator->kind;
7793 switch (id_declarator->kind)
7796 if (id_declarator->declarator
7797 && id_declarator->declarator->kind == cdk_id)
7799 sfk = id_declarator->declarator->u.id.sfk;
7800 if (sfk == sfk_destructor)
7807 tree qualifying_scope = id_declarator->u.id.qualifying_scope;
7808 tree decl = id_declarator->u.id.unqualified_name;
7811 if (qualifying_scope)
7813 if (at_function_scope_p ())
7817 A declarator-id shall not be qualified except
7820 None of the cases are permitted in block
7822 if (qualifying_scope == global_namespace)
7823 error ("invalid use of qualified-name %<::%D%>",
7825 else if (TYPE_P (qualifying_scope))
7826 error ("invalid use of qualified-name %<%T::%D%>",
7827 qualifying_scope, decl);
7829 error ("invalid use of qualified-name %<%D::%D%>",
7830 qualifying_scope, decl);
7831 return error_mark_node;
7833 else if (TYPE_P (qualifying_scope))
7835 ctype = qualifying_scope;
7836 if (innermost_code != cdk_function
7837 && current_class_type
7838 && !UNIQUELY_DERIVED_FROM_P (ctype,
7839 current_class_type))
7841 error ("type %qT is not derived from type %qT",
7842 ctype, current_class_type);
7843 return error_mark_node;
7846 else if (TREE_CODE (qualifying_scope) == NAMESPACE_DECL)
7847 in_namespace = qualifying_scope;
7849 switch (TREE_CODE (decl))
7855 if (innermost_code != cdk_function)
7857 error ("declaration of %qD as non-function", decl);
7858 return error_mark_node;
7860 else if (!qualifying_scope
7861 && !(current_class_type && at_class_scope_p ()))
7863 error ("declaration of %qD as non-member", decl);
7864 return error_mark_node;
7867 type = TREE_OPERAND (decl, 0);
7869 type = constructor_name (type);
7870 name = identifier_to_locale (IDENTIFIER_POINTER (type));
7875 case TEMPLATE_ID_EXPR:
7877 tree fns = TREE_OPERAND (decl, 0);
7880 if (TREE_CODE (dname) != IDENTIFIER_NODE)
7882 gcc_assert (is_overloaded_fn (dname));
7883 dname = DECL_NAME (get_first_fn (dname));
7888 case IDENTIFIER_NODE:
7889 if (TREE_CODE (decl) == IDENTIFIER_NODE)
7892 if (C_IS_RESERVED_WORD (dname))
7894 error ("declarator-id missing; using reserved word %qD",
7896 name = identifier_to_locale (IDENTIFIER_POINTER (dname));
7898 else if (!IDENTIFIER_TYPENAME_P (dname))
7899 name = identifier_to_locale (IDENTIFIER_POINTER (dname));
7902 gcc_assert (flags == NO_SPECIAL);
7903 flags = TYPENAME_FLAG;
7904 ctor_return_type = TREE_TYPE (dname);
7905 sfk = sfk_conversion;
7906 if (is_typename_at_global_scope (dname))
7907 name = identifier_to_locale (IDENTIFIER_POINTER (dname));
7909 name = "<invalid operator>";
7926 return error_mark_node;
7931 if (id_declarator->kind == cdk_id)
7937 The declarator in a function-definition shall have the form
7938 D1 ( parameter-declaration-clause) ... */
7939 if (funcdef_flag && innermost_code != cdk_function)
7941 error ("function definition does not declare parameters");
7942 return error_mark_node;
7945 if (((dname && IDENTIFIER_OPNAME_P (dname)) || flags == TYPENAME_FLAG)
7946 && innermost_code != cdk_function
7947 && ! (ctype && !declspecs->any_specifiers_p))
7949 error ("declaration of %qD as non-function", dname);
7950 return error_mark_node;
7953 /* Anything declared one level down from the top level
7954 must be one of the parameters of a function
7955 (because the body is at least two levels down). */
7957 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
7958 by not allowing C++ class definitions to specify their parameters
7959 with xdecls (must be spec.d in the parmlist).
7961 Since we now wait to push a class scope until we are sure that
7962 we are in a legitimate method context, we must set oldcname
7963 explicitly (since current_class_name is not yet alive).
7965 We also want to avoid calling this a PARM if it is in a namespace. */
7967 if (decl_context == NORMAL && !toplevel_bindings_p ())
7969 struct cp_binding_level *b = current_binding_level;
7970 current_binding_level = b->level_chain;
7971 if (current_binding_level != 0 && toplevel_bindings_p ())
7972 decl_context = PARM;
7973 current_binding_level = b;
7977 name = decl_context == PARM ? "parameter" : "type name";
7979 /* If there were multiple types specified in the decl-specifier-seq,
7980 issue an error message. */
7981 if (declspecs->multiple_types_p)
7983 error ("two or more data types in declaration of %qs", name);
7984 return error_mark_node;
7987 if (declspecs->conflicting_specifiers_p)
7989 error ("conflicting specifiers in declaration of %qs", name);
7990 return error_mark_node;
7993 /* Extract the basic type from the decl-specifier-seq. */
7994 type = declspecs->type;
7995 if (type == error_mark_node)
7998 type_was_error_mark_node = true;
8000 /* If the entire declaration is itself tagged as deprecated then
8001 suppress reports of deprecated items. */
8002 if (type && TREE_DEPRECATED (type)
8003 && deprecated_state != DEPRECATED_SUPPRESS)
8004 warn_deprecated_use (type, NULL_TREE);
8005 if (type && TREE_CODE (type) == TYPE_DECL)
8007 typedef_decl = type;
8008 type = TREE_TYPE (typedef_decl);
8009 if (TREE_DEPRECATED (type)
8010 && DECL_ARTIFICIAL (typedef_decl)
8011 && deprecated_state != DEPRECATED_SUPPRESS)
8012 warn_deprecated_use (type, NULL_TREE);
8014 /* No type at all: default to `int', and set DEFAULTED_INT
8015 because it was not a user-defined typedef. */
8016 if (type == NULL_TREE && (signed_p || unsigned_p || long_p || short_p))
8018 /* These imply 'int'. */
8019 type = integer_type_node;
8023 explicit_int = declspecs->explicit_int_p;
8024 explicit_char = declspecs->explicit_char_p;
8027 /* See the code below that used this. */
8029 decl_attr = DECL_ATTRIBUTES (typedef_decl);
8031 typedef_type = type;
8034 if (sfk != sfk_conversion)
8035 ctor_return_type = ctype;
8037 if (sfk != sfk_none)
8038 type = check_special_function_return_type (sfk, type,
8040 else if (type == NULL_TREE)
8046 /* We handle `main' specially here, because 'main () { }' is so
8047 common. With no options, it is allowed. With -Wreturn-type,
8048 it is a warning. It is only an error with -pedantic-errors. */
8049 is_main = (funcdef_flag
8050 && dname && MAIN_NAME_P (dname)
8051 && ctype == NULL_TREE
8052 && in_namespace == NULL_TREE
8053 && current_namespace == global_namespace);
8055 if (type_was_error_mark_node)
8056 /* We've already issued an error, don't complain more. */;
8057 else if (in_system_header || flag_ms_extensions)
8058 /* Allow it, sigh. */;
8060 permerror (input_location, "ISO C++ forbids declaration of %qs with no type", name);
8062 pedwarn (input_location, OPT_pedantic,
8063 "ISO C++ forbids declaration of %qs with no type", name);
8065 warning (OPT_Wreturn_type,
8066 "ISO C++ forbids declaration of %qs with no type", name);
8068 type = integer_type_node;
8073 /* Now process the modifiers that were specified
8074 and check for invalid combinations. */
8076 /* Long double is a special combination. */
8077 if (long_p && !longlong && TYPE_MAIN_VARIANT (type) == double_type_node)
8080 type = cp_build_qualified_type (long_double_type_node,
8081 cp_type_quals (type));
8084 /* Check all other uses of type modifiers. */
8086 if (unsigned_p || signed_p || long_p || short_p)
8090 if ((signed_p || unsigned_p) && TREE_CODE (type) != INTEGER_TYPE)
8091 error ("%<signed%> or %<unsigned%> invalid for %qs", name);
8092 else if (signed_p && unsigned_p)
8093 error ("%<signed%> and %<unsigned%> specified together for %qs", name);
8094 else if (longlong && TREE_CODE (type) != INTEGER_TYPE)
8095 error ("%<long long%> invalid for %qs", name);
8096 else if (long_p && TREE_CODE (type) == REAL_TYPE)
8097 error ("%<long%> invalid for %qs", name);
8098 else if (short_p && TREE_CODE (type) == REAL_TYPE)
8099 error ("%<short%> invalid for %qs", name);
8100 else if ((long_p || short_p) && TREE_CODE (type) != INTEGER_TYPE)
8101 error ("%<long%> or %<short%> invalid for %qs", name);
8102 else if ((long_p || short_p) && explicit_char)
8103 error ("%<long%> or %<short%> specified with char for %qs", name);
8104 else if (long_p && short_p)
8105 error ("%<long%> and %<short%> specified together for %qs", name);
8106 else if (type == char16_type_node || type == char32_type_node)
8108 if (signed_p || unsigned_p)
8109 error ("%<signed%> or %<unsigned%> invalid for %qs", name);
8110 else if (short_p || long_p)
8111 error ("%<short%> or %<long%> invalid for %qs", name);
8116 if (!explicit_int && !defaulted_int && !explicit_char && pedantic)
8118 pedwarn (input_location, OPT_pedantic,
8119 "long, short, signed or unsigned used invalidly for %qs",
8121 if (flag_pedantic_errors)
8126 /* Discard the type modifiers if they are invalid. */
8137 /* Decide whether an integer type is signed or not.
8138 Optionally treat bitfields as signed by default. */
8142 It is implementation-defined whether a plain (neither
8143 explicitly signed or unsigned) char, short, int, or long
8144 bit-field is signed or unsigned.
8146 Naturally, we extend this to long long as well. Note that
8147 this does not include wchar_t. */
8148 || (bitfield && !flag_signed_bitfields
8150 /* A typedef for plain `int' without `signed' can be
8151 controlled just like plain `int', but a typedef for
8152 `signed int' cannot be so controlled. */
8154 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl))
8155 && TREE_CODE (type) == INTEGER_TYPE
8156 && !same_type_p (TYPE_MAIN_VARIANT (type), wchar_type_node)))
8159 type = long_long_unsigned_type_node;
8161 type = long_unsigned_type_node;
8163 type = short_unsigned_type_node;
8164 else if (type == char_type_node)
8165 type = unsigned_char_type_node;
8166 else if (typedef_decl)
8167 type = unsigned_type_for (type);
8169 type = unsigned_type_node;
8171 else if (signed_p && type == char_type_node)
8172 type = signed_char_type_node;
8174 type = long_long_integer_type_node;
8176 type = long_integer_type_node;
8178 type = short_integer_type_node;
8180 if (declspecs->specs[(int)ds_complex])
8182 if (TREE_CODE (type) != INTEGER_TYPE && TREE_CODE (type) != REAL_TYPE)
8183 error ("complex invalid for %qs", name);
8184 /* If we just have "complex", it is equivalent to
8185 "complex double", but if any modifiers at all are specified it is
8186 the complex form of TYPE. E.g, "complex short" is
8187 "complex short int". */
8189 else if (defaulted_int && ! longlong
8190 && ! (long_p || short_p || signed_p || unsigned_p))
8191 type = complex_double_type_node;
8192 else if (type == integer_type_node)
8193 type = complex_integer_type_node;
8194 else if (type == float_type_node)
8195 type = complex_float_type_node;
8196 else if (type == double_type_node)
8197 type = complex_double_type_node;
8198 else if (type == long_double_type_node)
8199 type = complex_long_double_type_node;
8201 type = build_complex_type (type);
8204 type_quals = TYPE_UNQUALIFIED;
8205 if (declspecs->specs[(int)ds_const])
8206 type_quals |= TYPE_QUAL_CONST;
8207 /* A `constexpr' specifier used in an object declaration declares
8208 the object as `const'. */
8211 if (innermost_code == cdk_function)
8213 else if (declspecs->specs[(int)ds_const] != 0)
8214 error ("both %<const%> and %<constexpr%> cannot be used here");
8216 type_quals |= TYPE_QUAL_CONST;
8218 if (declspecs->specs[(int)ds_volatile])
8219 type_quals |= TYPE_QUAL_VOLATILE;
8220 if (declspecs->specs[(int)ds_restrict])
8221 type_quals |= TYPE_QUAL_RESTRICT;
8222 if (sfk == sfk_conversion && type_quals != TYPE_UNQUALIFIED)
8223 error ("qualifiers are not allowed on declaration of %<operator %T%>",
8226 type_quals |= cp_type_quals (type);
8227 type = cp_build_qualified_type_real
8228 (type, type_quals, ((typedef_decl && !DECL_ARTIFICIAL (typedef_decl)
8229 ? tf_ignore_bad_quals : 0) | tf_warning_or_error));
8230 /* We might have ignored or rejected some of the qualifiers. */
8231 type_quals = cp_type_quals (type);
8234 inlinep = !! declspecs->specs[(int)ds_inline];
8235 virtualp = !! declspecs->specs[(int)ds_virtual];
8236 explicitp = !! declspecs->specs[(int)ds_explicit];
8238 storage_class = declspecs->storage_class;
8239 if (storage_class == sc_static)
8240 staticp = 1 + (decl_context == FIELD);
8242 if (virtualp && staticp == 2)
8244 error ("member %qD cannot be declared both virtual and static", dname);
8245 storage_class = sc_none;
8248 friendp = !! declspecs->specs[(int)ds_friend];
8250 if (dependent_name && !friendp)
8252 error ("%<%T::%D%> is not a valid declarator", ctype, dependent_name);
8253 return error_mark_node;
8256 /* Issue errors about use of storage classes for parameters. */
8257 if (decl_context == PARM)
8259 if (declspecs->specs[(int)ds_typedef])
8261 error ("typedef declaration invalid in parameter declaration");
8262 return error_mark_node;
8264 else if (template_parm_flag && storage_class != sc_none)
8266 error ("storage class specified for template parameter %qs", name);
8267 return error_mark_node;
8269 else if (storage_class == sc_static
8270 || storage_class == sc_extern
8272 error ("storage class specifiers invalid in parameter declarations");
8274 if (type_uses_auto (type))
8276 error ("parameter declared %<auto%>");
8277 type = error_mark_node;
8280 /* Function parameters cannot be constexpr. If we saw one, moan
8281 and pretend it wasn't there. */
8284 error ("a parameter cannot be declared %<constexpr%>");
8289 /* Give error if `virtual' is used outside of class declaration. */
8291 && (current_class_name == NULL_TREE || decl_context != FIELD))
8293 error ("%<virtual%> outside class declaration");
8297 /* Static anonymous unions are dealt with here. */
8298 if (staticp && decl_context == TYPENAME
8300 && ANON_AGGR_TYPE_P (declspecs->type))
8301 decl_context = FIELD;
8303 /* Warn about storage classes that are invalid for certain
8304 kinds of declarations (parameters, typenames, etc.). */
8307 && storage_class != sc_extern
8308 && storage_class != sc_static)
8309 || declspecs->specs[(int)ds_typedef]))
8311 error ("multiple storage classes in declaration of %qs", name);
8314 if (decl_context != NORMAL
8315 && ((storage_class != sc_none
8316 && storage_class != sc_mutable)
8319 if ((decl_context == PARM || decl_context == CATCHPARM)
8320 && (storage_class == sc_register
8321 || storage_class == sc_auto))
8323 else if (declspecs->specs[(int)ds_typedef])
8325 else if (decl_context == FIELD
8326 /* C++ allows static class elements. */
8327 && storage_class == sc_static)
8328 /* C++ also allows inlines and signed and unsigned elements,
8329 but in those cases we don't come in here. */
8333 if (decl_context == FIELD)
8334 error ("storage class specified for %qs", name);
8337 if (decl_context == PARM || decl_context == CATCHPARM)
8338 error ("storage class specified for parameter %qs", name);
8340 error ("storage class specified for typename");
8342 if (storage_class == sc_register
8343 || storage_class == sc_auto
8344 || storage_class == sc_extern
8346 storage_class = sc_none;
8349 else if (storage_class == sc_extern && funcdef_flag
8350 && ! toplevel_bindings_p ())
8351 error ("nested function %qs declared %<extern%>", name);
8352 else if (toplevel_bindings_p ())
8354 if (storage_class == sc_auto)
8355 error ("top-level declaration of %qs specifies %<auto%>", name);
8358 && storage_class != sc_extern
8359 && storage_class != sc_static)
8361 error ("function-scope %qs implicitly auto and declared %<__thread%>",
8366 if (storage_class && friendp)
8368 error ("storage class specifiers invalid in friend function declarations");
8369 storage_class = sc_none;
8374 unqualified_id = NULL_TREE;
8377 unqualified_id = id_declarator->u.id.unqualified_name;
8378 switch (TREE_CODE (unqualified_id))
8381 unqualified_id = TREE_OPERAND (unqualified_id, 0);
8382 if (TYPE_P (unqualified_id))
8383 unqualified_id = constructor_name (unqualified_id);
8386 case IDENTIFIER_NODE:
8387 case TEMPLATE_ID_EXPR:
8395 /* Determine the type of the entity declared by recurring on the
8397 for (; declarator; declarator = declarator->declarator)
8399 const cp_declarator *inner_declarator;
8402 if (type == error_mark_node)
8403 return error_mark_node;
8405 attrs = declarator->attributes;
8411 if (declarator == NULL || declarator->kind == cdk_id)
8412 attr_flags |= (int) ATTR_FLAG_DECL_NEXT;
8413 if (declarator->kind == cdk_function)
8414 attr_flags |= (int) ATTR_FLAG_FUNCTION_NEXT;
8415 if (declarator->kind == cdk_array)
8416 attr_flags |= (int) ATTR_FLAG_ARRAY_NEXT;
8417 returned_attrs = decl_attributes (&type,
8418 chainon (returned_attrs, attrs),
8422 if (declarator->kind == cdk_id)
8425 inner_declarator = declarator->declarator;
8427 switch (declarator->kind)
8430 type = create_array_type_for_decl (dname, type,
8431 declarator->u.array.bounds);
8439 /* Declaring a function type.
8440 Make sure we have a valid type for the function to return. */
8442 if (type_quals != TYPE_UNQUALIFIED)
8444 if (SCALAR_TYPE_P (type) || VOID_TYPE_P (type))
8445 warning (OPT_Wignored_qualifiers,
8446 "type qualifiers ignored on function return type");
8447 /* We now know that the TYPE_QUALS don't apply to the
8448 decl, but to its return type. */
8449 type_quals = TYPE_UNQUALIFIED;
8451 errmsg = targetm.invalid_return_type (type);
8455 type = integer_type_node;
8458 /* Error about some types functions can't return. */
8460 if (TREE_CODE (type) == FUNCTION_TYPE)
8462 error ("%qs declared as function returning a function", name);
8463 return error_mark_node;
8465 if (TREE_CODE (type) == ARRAY_TYPE)
8467 error ("%qs declared as function returning an array", name);
8468 return error_mark_node;
8471 /* Pick up type qualifiers which should be applied to `this'. */
8472 memfn_quals = declarator->u.function.qualifiers;
8474 /* Pick up the exception specifications. */
8475 raises = declarator->u.function.exception_specification;
8477 /* Say it's a definition only for the CALL_EXPR
8478 closest to the identifier. */
8479 funcdecl_p = inner_declarator && inner_declarator->kind == cdk_id;
8481 /* Handle a late-specified return type. */
8484 if (type_uses_auto (type))
8486 if (!declarator->u.function.late_return_type)
8488 error ("%qs function uses %<auto%> type specifier without"
8489 " late return type", name);
8490 return error_mark_node;
8492 else if (!is_auto (type))
8494 error ("%qs function with late return type has"
8495 " %qT as its type rather than plain %<auto%>",
8497 return error_mark_node;
8500 else if (declarator->u.function.late_return_type)
8502 error ("%qs function with late return type not declared"
8503 " with %<auto%> type specifier", name);
8504 return error_mark_node;
8507 type = splice_late_return_type
8508 (type, declarator->u.function.late_return_type);
8509 if (type == error_mark_node)
8510 return error_mark_node;
8512 if (ctype == NULL_TREE
8513 && decl_context == FIELD
8515 && (friendp == 0 || dname == current_class_name))
8516 ctype = current_class_type;
8518 if (ctype && (sfk == sfk_constructor
8519 || sfk == sfk_destructor))
8521 /* We are within a class's scope. If our declarator name
8522 is the same as the class name, and we are defining
8523 a function, then it is a constructor/destructor, and
8524 therefore returns a void type. */
8526 /* ISO C++ 12.4/2. A destructor may not be declared
8527 const or volatile. A destructor may not be
8530 ISO C++ 12.1. A constructor may not be declared
8531 const or volatile. A constructor may not be
8532 virtual. A constructor may not be static. */
8534 error ((flags == DTOR_FLAG)
8535 ? "destructor cannot be static member function"
8536 : "constructor cannot be static member function");
8539 error ((flags == DTOR_FLAG)
8540 ? "destructors may not be cv-qualified"
8541 : "constructors may not be cv-qualified");
8542 memfn_quals = TYPE_UNQUALIFIED;
8545 if (decl_context == FIELD
8546 && !member_function_or_else (ctype,
8549 return error_mark_node;
8551 if (flags != DTOR_FLAG)
8553 /* It's a constructor. */
8558 permerror (input_location, "constructors cannot be declared virtual");
8561 if (decl_context == FIELD
8562 && sfk != sfk_constructor)
8563 return error_mark_node;
8565 if (decl_context == FIELD)
8571 error ("can't initialize friend function %qs", name);
8574 /* Cannot be both friend and virtual. */
8575 error ("virtual functions cannot be friends");
8578 if (decl_context == NORMAL)
8579 error ("friend declaration not in class definition");
8580 if (current_function_decl && funcdef_flag)
8581 error ("can't define friend function %qs in a local "
8585 else if (ctype && sfk == sfk_conversion)
8589 maybe_warn_cpp0x (CPP0X_EXPLICIT_CONVERSION);
8594 /* It is not allowed to use `constexpr' in a function
8595 declaration that is not a definition.
8596 That is too strict, though. */
8597 if (constexpr_p && !funcdef_flag)
8599 error ("the %<constexpr%> specifier cannot be used in "
8600 "a function declaration that is not a definition");
8601 constexpr_p = false;
8604 /* A constexpr non-static member function is implicitly const. */
8605 if (constexpr_p && decl_context == FIELD && staticp == 0
8606 && sfk != sfk_constructor && sfk != sfk_destructor)
8607 memfn_quals |= TYPE_QUAL_CONST;
8609 arg_types = grokparms (declarator->u.function.parameters,
8612 if (inner_declarator
8613 && inner_declarator->kind == cdk_id
8614 && inner_declarator->u.id.sfk == sfk_destructor
8615 && arg_types != void_list_node)
8617 error ("destructors may not have parameters");
8618 arg_types = void_list_node;
8622 type = build_function_type (type, arg_types);
8629 /* Filter out pointers-to-references and references-to-references.
8630 We can get these if a TYPE_DECL is used. */
8632 if (TREE_CODE (type) == REFERENCE_TYPE)
8634 if (declarator->kind != cdk_reference)
8636 error ("cannot declare pointer to %q#T", type);
8637 type = TREE_TYPE (type);
8640 /* In C++0x, we allow reference to reference declarations
8641 that occur indirectly through typedefs [7.1.3/8 dcl.typedef]
8642 and template type arguments [14.3.1/4 temp.arg.type]. The
8643 check for direct reference to reference declarations, which
8644 are still forbidden, occurs below. Reasoning behind the change
8645 can be found in DR106, DR540, and the rvalue reference
8647 else if (cxx_dialect == cxx98)
8649 error ("cannot declare reference to %q#T", type);
8650 type = TREE_TYPE (type);
8653 else if (VOID_TYPE_P (type))
8655 if (declarator->kind == cdk_reference)
8656 error ("cannot declare reference to %q#T", type);
8657 else if (declarator->kind == cdk_ptrmem)
8658 error ("cannot declare pointer to %q#T member", type);
8661 /* We now know that the TYPE_QUALS don't apply to the decl,
8662 but to the target of the pointer. */
8663 type_quals = TYPE_UNQUALIFIED;
8665 if (declarator->kind == cdk_ptrmem
8666 && (TREE_CODE (type) == FUNCTION_TYPE
8667 || (memfn_quals && TREE_CODE (type) == METHOD_TYPE)))
8669 memfn_quals |= type_memfn_quals (type);
8670 type = build_memfn_type (type,
8671 declarator->u.pointer.class_type,
8673 memfn_quals = TYPE_UNQUALIFIED;
8676 if (TREE_CODE (type) == FUNCTION_TYPE
8677 && type_memfn_quals (type) != TYPE_UNQUALIFIED)
8678 error (declarator->kind == cdk_reference
8679 ? G_("cannot declare reference to qualified function type %qT")
8680 : G_("cannot declare pointer to qualified function type %qT"),
8683 if (declarator->kind == cdk_reference)
8685 /* In C++0x, the type we are creating a reference to might be
8686 a typedef which is itself a reference type. In that case,
8687 we follow the reference collapsing rules in
8688 [7.1.3/8 dcl.typedef] to create the final reference type:
8690 "If a typedef TD names a type that is a reference to a type
8691 T, an attempt to create the type 'lvalue reference to cv TD'
8692 creates the type 'lvalue reference to T,' while an attempt
8693 to create the type "rvalue reference to cv TD' creates the
8696 if (!VOID_TYPE_P (type))
8697 type = cp_build_reference_type
8698 ((TREE_CODE (type) == REFERENCE_TYPE
8699 ? TREE_TYPE (type) : type),
8700 (declarator->u.reference.rvalue_ref
8701 && (TREE_CODE(type) != REFERENCE_TYPE
8702 || TYPE_REF_IS_RVALUE (type))));
8704 /* In C++0x, we need this check for direct reference to
8705 reference declarations, which are forbidden by
8706 [8.3.2/5 dcl.ref]. Reference to reference declarations
8707 are only allowed indirectly through typedefs and template
8708 type arguments. Example:
8710 void foo(int & &); // invalid ref-to-ref decl
8712 typedef int & int_ref;
8713 void foo(int_ref &); // valid ref-to-ref decl
8715 if (inner_declarator && inner_declarator->kind == cdk_reference)
8716 error ("cannot declare reference to %q#T, which is not "
8717 "a typedef or a template type argument", type);
8719 else if (TREE_CODE (type) == METHOD_TYPE)
8720 type = build_ptrmemfunc_type (build_pointer_type (type));
8721 else if (declarator->kind == cdk_ptrmem)
8723 gcc_assert (TREE_CODE (declarator->u.pointer.class_type)
8725 if (declarator->u.pointer.class_type == error_mark_node)
8726 /* We will already have complained. */
8727 type = error_mark_node;
8729 type = build_ptrmem_type (declarator->u.pointer.class_type,
8733 type = build_pointer_type (type);
8735 /* Process a list of type modifier keywords (such as
8736 const or volatile) that were given inside the `*' or `&'. */
8738 if (declarator->u.pointer.qualifiers)
8741 = cp_build_qualified_type (type,
8742 declarator->u.pointer.qualifiers);
8743 type_quals = cp_type_quals (type);
8756 if (unqualified_id && TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR
8757 && TREE_CODE (type) != FUNCTION_TYPE
8758 && TREE_CODE (type) != METHOD_TYPE)
8760 error ("template-id %qD used as a declarator",
8762 unqualified_id = dname;
8765 /* If TYPE is a FUNCTION_TYPE, but the function name was explicitly
8766 qualified with a class-name, turn it into a METHOD_TYPE, unless
8767 we know that the function is static. We take advantage of this
8768 opportunity to do other processing that pertains to entities
8769 explicitly declared to be class members. Note that if DECLARATOR
8770 is non-NULL, we know it is a cdk_id declarator; otherwise, we
8771 would not have exited the loop above. */
8773 && declarator->u.id.qualifying_scope
8774 && TYPE_P (declarator->u.id.qualifying_scope))
8778 ctype = declarator->u.id.qualifying_scope;
8779 ctype = TYPE_MAIN_VARIANT (ctype);
8781 while (t != NULL_TREE && CLASS_TYPE_P (t))
8783 /* You're supposed to have one `template <...>' for every
8784 template class, but you don't need one for a full
8785 specialization. For example:
8787 template <class T> struct S{};
8788 template <> struct S<int> { void f(); };
8789 void S<int>::f () {}
8791 is correct; there shouldn't be a `template <>' for the
8792 definition of `S<int>::f'. */
8793 if (CLASSTYPE_TEMPLATE_SPECIALIZATION (t)
8794 && !any_dependent_template_arguments_p (CLASSTYPE_TI_ARGS (t)))
8795 /* T is an explicit (not partial) specialization. All
8796 containing classes must therefore also be explicitly
8799 if ((CLASSTYPE_USE_TEMPLATE (t) || CLASSTYPE_IS_TEMPLATE (t))
8800 && PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (t)))
8801 template_count += 1;
8803 t = TYPE_MAIN_DECL (t);
8804 t = DECL_CONTEXT (t);
8807 if (ctype == current_class_type)
8811 permerror (input_location, "member functions are implicitly friends of their class");
8815 permerror (declarator->id_loc,
8816 "extra qualification %<%T::%> on member %qs",
8819 else if (/* If the qualifying type is already complete, then we
8820 can skip the following checks. */
8821 !COMPLETE_TYPE_P (ctype)
8822 && (/* If the function is being defined, then
8823 qualifying type must certainly be complete. */
8825 /* A friend declaration of "T::f" is OK, even if
8826 "T" is a template parameter. But, if this
8827 function is not a friend, the qualifying type
8829 || (!friendp && !CLASS_TYPE_P (ctype))
8830 /* For a declaration, the type need not be
8831 complete, if either it is dependent (since there
8832 is no meaningful definition of complete in that
8833 case) or the qualifying class is currently being
8835 || !(dependent_type_p (ctype)
8836 || currently_open_class (ctype)))
8837 /* Check that the qualifying type is complete. */
8838 && !complete_type_or_else (ctype, NULL_TREE))
8839 return error_mark_node;
8840 else if (TREE_CODE (type) == FUNCTION_TYPE)
8842 tree sname = declarator->u.id.unqualified_name;
8844 if (current_class_type
8845 && (!friendp || funcdef_flag))
8848 ? "cannot define member function %<%T::%s%> within %<%T%>"
8849 : "cannot declare member function %<%T::%s%> within %<%T%>",
8850 ctype, name, current_class_type);
8851 return error_mark_node;
8854 /* It is not permitted to define a member function outside ist
8855 membership class as `constexpr'. */
8857 error ("a constexpr function cannot be defined "
8858 "outside of its class");
8860 if (TREE_CODE (sname) == IDENTIFIER_NODE
8861 && NEW_DELETE_OPNAME_P (sname))
8862 /* Overloaded operator new and operator delete
8863 are always static functions. */
8866 type = build_memfn_type (type, ctype, memfn_quals);
8868 else if (declspecs->specs[(int)ds_typedef]
8869 && current_class_type)
8871 error ("cannot declare member %<%T::%s%> within %qT",
8872 ctype, name, current_class_type);
8873 return error_mark_node;
8877 /* Now TYPE has the actual type. */
8882 *attrlist = chainon (returned_attrs, *attrlist);
8884 attrlist = &returned_attrs;
8887 /* Handle parameter packs. */
8888 if (parameter_pack_p)
8890 if (decl_context == PARM)
8891 /* Turn the type into a pack expansion.*/
8892 type = make_pack_expansion (type);
8894 error ("non-parameter %qs cannot be a parameter pack", name);
8897 /* Did array size calculations overflow? */
8899 if (TREE_CODE (type) == ARRAY_TYPE
8900 && COMPLETE_TYPE_P (type)
8901 && TREE_CODE (TYPE_SIZE_UNIT (type)) == INTEGER_CST
8902 && TREE_OVERFLOW (TYPE_SIZE_UNIT (type)))
8904 error ("size of array %qs is too large", name);
8905 /* If we proceed with the array type as it is, we'll eventually
8906 crash in tree_low_cst(). */
8907 type = error_mark_node;
8910 if ((decl_context == FIELD || decl_context == PARM)
8911 && !processing_template_decl
8912 && variably_modified_type_p (type, NULL_TREE))
8914 if (decl_context == FIELD)
8915 error ("data member may not have variably modified type %qT", type);
8917 error ("parameter may not have variably modified type %qT", type);
8918 type = error_mark_node;
8921 if (explicitp == 1 || (explicitp && friendp))
8923 /* [dcl.fct.spec] The explicit specifier shall only be used in
8924 declarations of constructors within a class definition. */
8925 error ("only declarations of constructors can be %<explicit%>");
8929 if (storage_class == sc_mutable)
8931 if (decl_context != FIELD || friendp)
8933 error ("non-member %qs cannot be declared %<mutable%>", name);
8934 storage_class = sc_none;
8936 else if (decl_context == TYPENAME || declspecs->specs[(int)ds_typedef])
8938 error ("non-object member %qs cannot be declared %<mutable%>", name);
8939 storage_class = sc_none;
8941 else if (TREE_CODE (type) == FUNCTION_TYPE
8942 || TREE_CODE (type) == METHOD_TYPE)
8944 error ("function %qs cannot be declared %<mutable%>", name);
8945 storage_class = sc_none;
8949 error ("static %qs cannot be declared %<mutable%>", name);
8950 storage_class = sc_none;
8952 else if (type_quals & TYPE_QUAL_CONST)
8954 error ("const %qs cannot be declared %<mutable%>", name);
8955 storage_class = sc_none;
8959 /* If this is declaring a typedef name, return a TYPE_DECL. */
8960 if (declspecs->specs[(int)ds_typedef] && decl_context != TYPENAME)
8964 /* Note that the grammar rejects storage classes
8965 in typenames, fields or parameters. */
8966 if (current_lang_name == lang_name_java)
8967 TYPE_FOR_JAVA (type) = 1;
8969 /* This declaration:
8971 typedef void f(int) const;
8973 declares a function type which is not a member of any
8974 particular class, but which is cv-qualified; for
8975 example "f S::*" declares a pointer to a const-qualified
8976 member function of S. We record the cv-qualification in the
8978 if (memfn_quals && TREE_CODE (type) == FUNCTION_TYPE)
8980 type = apply_memfn_quals (type, memfn_quals);
8982 /* We have now dealt with these qualifiers. */
8983 memfn_quals = TYPE_UNQUALIFIED;
8986 if (decl_context == FIELD)
8987 decl = build_lang_decl (TYPE_DECL, unqualified_id, type);
8989 decl = build_decl (input_location, TYPE_DECL, unqualified_id, type);
8990 if (id_declarator && declarator->u.id.qualifying_scope) {
8991 error_at (DECL_SOURCE_LOCATION (decl),
8992 "typedef name may not be a nested-name-specifier");
8993 TREE_TYPE (decl) = error_mark_node;
8996 if (decl_context != FIELD)
8998 if (!current_function_decl)
8999 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
9000 else if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (current_function_decl)
9001 || (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P
9002 (current_function_decl)))
9003 /* The TYPE_DECL is "abstract" because there will be
9004 clones of this constructor/destructor, and there will
9005 be copies of this TYPE_DECL generated in those
9007 DECL_ABSTRACT (decl) = 1;
9009 else if (constructor_name_p (unqualified_id, current_class_type))
9010 permerror (input_location, "ISO C++ forbids nested type %qD with same name "
9011 "as enclosing class",
9014 /* If the user declares "typedef struct {...} foo" then the
9015 struct will have an anonymous name. Fill that name in now.
9016 Nothing can refer to it, so nothing needs know about the name
9018 if (type != error_mark_node
9021 && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
9022 && TYPE_ANONYMOUS_P (type)
9023 && cp_type_quals (type) == TYPE_UNQUALIFIED)
9027 /* Replace the anonymous name with the real name everywhere. */
9028 for (t = TYPE_MAIN_VARIANT (type); t; t = TYPE_NEXT_VARIANT (t))
9030 if (ANON_AGGRNAME_P (TYPE_IDENTIFIER (t)))
9032 debug_hooks->set_name (t, decl);
9033 TYPE_NAME (t) = decl;
9037 if (TYPE_LANG_SPECIFIC (type))
9038 TYPE_WAS_ANONYMOUS (type) = 1;
9040 /* If this is a typedef within a template class, the nested
9041 type is a (non-primary) template. The name for the
9042 template needs updating as well. */
9043 if (TYPE_LANG_SPECIFIC (type) && CLASSTYPE_TEMPLATE_INFO (type))
9044 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type))
9045 = TYPE_IDENTIFIER (type);
9047 /* Adjust linkage now that we aren't anonymous anymore. */
9048 set_linkage_according_to_type (type, TYPE_MAIN_DECL (type));
9049 determine_visibility (TYPE_MAIN_DECL (type));
9051 /* FIXME remangle member functions; member functions of a
9052 type with external linkage have external linkage. */
9056 || (typedef_decl && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl)))
9057 C_TYPEDEF_EXPLICITLY_SIGNED (decl) = 1;
9059 bad_specifiers (decl, "type", virtualp,
9060 memfn_quals != TYPE_UNQUALIFIED,
9061 inlinep, friendp, raises != NULL_TREE);
9066 /* Detect the case of an array type of unspecified size
9067 which came, as such, direct from a typedef name.
9068 We must copy the type, so that the array's domain can be
9069 individually set by the object's initializer. */
9071 if (type && typedef_type
9072 && TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type)
9073 && TYPE_MAIN_VARIANT (type) == TYPE_MAIN_VARIANT (typedef_type))
9074 type = build_cplus_array_type (TREE_TYPE (type), NULL_TREE);
9076 /* Detect where we're using a typedef of function type to declare a
9077 function. PARMS will not be set, so we must create it now. */
9079 if (type == typedef_type && TREE_CODE (type) == FUNCTION_TYPE)
9081 tree decls = NULL_TREE;
9084 for (args = TYPE_ARG_TYPES (type);
9085 args && args != void_list_node;
9086 args = TREE_CHAIN (args))
9088 tree decl = cp_build_parm_decl (NULL_TREE, TREE_VALUE (args));
9090 TREE_CHAIN (decl) = decls;
9094 parms = nreverse (decls);
9096 if (decl_context != TYPENAME)
9098 /* A cv-qualifier-seq shall only be part of the function type
9099 for a non-static member function. [8.3.5/4 dcl.fct] */
9100 if (type_memfn_quals (type) != TYPE_UNQUALIFIED
9101 && (current_class_type == NULL_TREE || staticp) )
9104 ? G_("qualified function types cannot be used to "
9105 "declare static member functions")
9106 : G_("qualified function types cannot be used to "
9107 "declare free functions"));
9108 type = TYPE_MAIN_VARIANT (type);
9111 /* The qualifiers on the function type become the qualifiers on
9112 the non-static member function. */
9113 memfn_quals |= type_memfn_quals (type);
9114 type_quals = TYPE_UNQUALIFIED;
9118 /* If this is a type name (such as, in a cast or sizeof),
9119 compute the type and return it now. */
9121 if (decl_context == TYPENAME)
9123 /* Note that the grammar rejects storage classes
9124 in typenames, fields or parameters. */
9125 if (type_quals != TYPE_UNQUALIFIED)
9126 type_quals = TYPE_UNQUALIFIED;
9128 /* Special case: "friend class foo" looks like a TYPENAME context. */
9131 if (type_quals != TYPE_UNQUALIFIED)
9133 error ("type qualifiers specified for friend class declaration");
9134 type_quals = TYPE_UNQUALIFIED;
9138 error ("%<inline%> specified for friend class declaration");
9144 /* Don't allow friend declaration without a class-key. */
9145 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
9146 permerror (input_location, "template parameters cannot be friends");
9147 else if (TREE_CODE (type) == TYPENAME_TYPE)
9148 permerror (input_location, "friend declaration requires class-key, "
9149 "i.e. %<friend class %T::%D%>",
9150 TYPE_CONTEXT (type), TYPENAME_TYPE_FULLNAME (type));
9152 permerror (input_location, "friend declaration requires class-key, "
9153 "i.e. %<friend %#T%>",
9157 /* Only try to do this stuff if we didn't already give up. */
9158 if (type != integer_type_node)
9160 /* A friendly class? */
9161 if (current_class_type)
9162 make_friend_class (current_class_type, TYPE_MAIN_VARIANT (type),
9165 error ("trying to make class %qT a friend of global scope",
9168 type = void_type_node;
9171 else if (memfn_quals)
9173 if (ctype == NULL_TREE
9174 && TREE_CODE (type) == METHOD_TYPE)
9175 ctype = TYPE_METHOD_BASETYPE (type);
9178 type = build_memfn_type (type, ctype, memfn_quals);
9179 /* Core issue #547: need to allow this in template type args. */
9180 else if (template_type_arg && TREE_CODE (type) == FUNCTION_TYPE)
9181 type = apply_memfn_quals (type, memfn_quals);
9183 error ("invalid qualifiers on non-member function type");
9188 else if (unqualified_id == NULL_TREE && decl_context != PARM
9189 && decl_context != CATCHPARM
9190 && TREE_CODE (type) != UNION_TYPE
9193 error ("abstract declarator %qT used as declaration", type);
9194 return error_mark_node;
9197 /* Only functions may be declared using an operator-function-id. */
9199 && IDENTIFIER_OPNAME_P (unqualified_id)
9200 && TREE_CODE (type) != FUNCTION_TYPE
9201 && TREE_CODE (type) != METHOD_TYPE)
9203 error ("declaration of %qD as non-function", unqualified_id);
9204 return error_mark_node;
9207 /* We don't check parameter types here because we can emit a better
9208 error message later. */
9209 if (decl_context != PARM)
9211 type = check_var_type (unqualified_id, type);
9212 if (type == error_mark_node)
9213 return error_mark_node;
9216 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
9217 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
9219 if (decl_context == PARM || decl_context == CATCHPARM)
9221 if (ctype || in_namespace)
9222 error ("cannot use %<::%> in parameter declaration");
9224 /* A parameter declared as an array of T is really a pointer to T.
9225 One declared as a function is really a pointer to a function.
9226 One declared as a member is really a pointer to member. */
9228 if (TREE_CODE (type) == ARRAY_TYPE)
9230 /* Transfer const-ness of array into that of type pointed to. */
9231 type = build_pointer_type (TREE_TYPE (type));
9232 type_quals = TYPE_UNQUALIFIED;
9234 else if (TREE_CODE (type) == FUNCTION_TYPE)
9235 type = build_pointer_type (type);
9241 if (decl_context == PARM)
9243 decl = cp_build_parm_decl (unqualified_id, type);
9245 bad_specifiers (decl, "parameter", virtualp,
9246 memfn_quals != TYPE_UNQUALIFIED,
9247 inlinep, friendp, raises != NULL_TREE);
9249 else if (decl_context == FIELD)
9251 /* The C99 flexible array extension. */
9252 if (!staticp && TREE_CODE (type) == ARRAY_TYPE
9253 && TYPE_DOMAIN (type) == NULL_TREE)
9255 tree itype = compute_array_index_type (dname, integer_zero_node);
9256 type = build_cplus_array_type (TREE_TYPE (type), itype);
9259 if (type == error_mark_node)
9261 /* Happens when declaring arrays of sizes which
9262 are error_mark_node, for example. */
9265 else if (in_namespace && !friendp)
9267 /* Something like struct S { int N::j; }; */
9268 error ("invalid use of %<::%>");
9269 return error_mark_node;
9271 else if (TREE_CODE (type) == FUNCTION_TYPE)
9274 tree function_context;
9278 if (ctype == NULL_TREE)
9279 ctype = current_class_type;
9281 if (ctype == NULL_TREE)
9283 error ("can't make %qD into a method -- not in a class",
9285 return error_mark_node;
9288 /* ``A union may [ ... ] not [ have ] virtual functions.''
9290 if (virtualp && TREE_CODE (ctype) == UNION_TYPE)
9292 error ("function %qD declared virtual inside a union",
9294 return error_mark_node;
9297 if (NEW_DELETE_OPNAME_P (unqualified_id))
9301 error ("%qD cannot be declared virtual, since it "
9307 else if (staticp < 2)
9308 type = build_memfn_type (type, ctype, memfn_quals);
9311 /* Check that the name used for a destructor makes sense. */
9312 if (sfk == sfk_destructor)
9314 tree uqname = id_declarator->u.id.unqualified_name;
9318 gcc_assert (friendp);
9319 error ("expected qualified name in friend declaration "
9320 "for destructor %qD", uqname);
9321 return error_mark_node;
9324 if (!check_dtor_name (ctype, TREE_OPERAND (uqname, 0)))
9326 error ("declaration of %qD as member of %qT",
9328 return error_mark_node;
9331 error ("a destructor cannot be %<constexpr%>");
9333 else if (sfk == sfk_constructor && friendp)
9335 error ("expected qualified name in friend declaration "
9336 "for constructor %qD",
9337 id_declarator->u.id.unqualified_name);
9338 return error_mark_node;
9341 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
9342 function_context = (ctype != NULL_TREE) ?
9343 decl_function_context (TYPE_MAIN_DECL (ctype)) : NULL_TREE;
9344 publicp = (! friendp || ! staticp)
9345 && function_context == NULL_TREE;
9346 decl = grokfndecl (ctype, type,
9347 TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
9348 ? unqualified_id : dname,
9351 virtualp, flags, memfn_quals, raises,
9352 friendp ? -1 : 0, friendp, publicp,
9353 inlinep || constexpr_p,
9355 funcdef_flag, template_count, in_namespace,
9356 attrlist, declarator->id_loc);
9357 if (decl == NULL_TREE)
9358 return error_mark_node;
9360 /* This clobbers the attrs stored in `decl' from `attrlist'. */
9361 /* The decl and setting of decl_attr is also turned off. */
9362 decl = build_decl_attribute_variant (decl, decl_attr);
9365 /* [class.conv.ctor]
9367 A constructor declared without the function-specifier
9368 explicit that can be called with a single parameter
9369 specifies a conversion from the type of its first
9370 parameter to the type of its class. Such a constructor
9371 is called a converting constructor. */
9373 DECL_NONCONVERTING_P (decl) = 1;
9375 else if (TREE_CODE (type) == METHOD_TYPE)
9377 /* We only get here for friend declarations of
9378 members of other classes. */
9379 /* All method decls are public, so tell grokfndecl to set
9380 TREE_PUBLIC, also. */
9381 decl = grokfndecl (ctype, type,
9382 TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
9383 ? unqualified_id : dname,
9386 virtualp, flags, memfn_quals, raises,
9387 friendp ? -1 : 0, friendp, 1, 0, sfk,
9388 funcdef_flag, template_count, in_namespace,
9390 declarator->id_loc);
9391 if (decl == NULL_TREE)
9392 return error_mark_node;
9394 else if (!staticp && !dependent_type_p (type)
9395 && !COMPLETE_TYPE_P (complete_type (type))
9396 && (TREE_CODE (type) != ARRAY_TYPE || initialized == 0))
9399 error ("field %qD has incomplete type", unqualified_id);
9401 error ("name %qT has incomplete type", type);
9403 /* If we're instantiating a template, tell them which
9404 instantiation made the field's type be incomplete. */
9405 if (current_class_type
9406 && TYPE_NAME (current_class_type)
9407 && IDENTIFIER_TEMPLATE (TYPE_IDENTIFIER (current_class_type))
9409 && declspecs->type == type)
9410 error (" in instantiation of template %qT",
9411 current_class_type);
9413 return error_mark_node;
9419 error ("%qE is neither function nor member function; "
9420 "cannot be declared friend", unqualified_id);
9428 /* Friends are treated specially. */
9429 if (ctype == current_class_type)
9430 ; /* We already issued a permerror. */
9431 else if (decl && DECL_NAME (decl))
9433 if (template_class_depth (current_class_type) == 0)
9435 decl = check_explicit_specialization
9436 (unqualified_id, decl, template_count,
9437 2 * funcdef_flag + 4);
9438 if (decl == error_mark_node)
9439 return error_mark_node;
9442 DECL_DECLARED_CONSTEXPR_P (decl) = constexpr_p;
9443 decl = do_friend (ctype, unqualified_id, decl,
9449 return error_mark_node;
9452 /* Structure field. It may not be a function, except for C++. */
9454 if (decl == NULL_TREE)
9460 /* An attempt is being made to initialize a non-static
9461 member. But, from [class.mem]:
9463 4 A member-declarator can contain a
9464 constant-initializer only if it declares a static
9465 member (_class.static_) of integral or enumeration
9466 type, see _class.static.data_.
9468 This used to be relatively common practice, but
9469 the rest of the compiler does not correctly
9470 handle the initialization unless the member is
9471 static so we make it static below. */
9472 permerror (input_location, "ISO C++ forbids initialization of member %qD",
9474 permerror (input_location, "making %qD static", unqualified_id);
9478 if (uses_template_parms (type))
9479 /* We'll check at instantiation time. */
9481 else if (check_static_variable_definition (unqualified_id,
9483 /* If we just return the declaration, crashes
9484 will sometimes occur. We therefore return
9485 void_type_node, as if this was a friend
9486 declaration, to cause callers to completely
9487 ignore this declaration. */
9488 return error_mark_node;
9493 /* C++ allows static class members. All other work
9494 for this is done by grokfield. */
9495 decl = build_lang_decl (VAR_DECL, unqualified_id, type);
9496 set_linkage_for_static_data_member (decl);
9497 /* Even if there is an in-class initialization, DECL
9498 is considered undefined until an out-of-class
9499 definition is provided. */
9500 DECL_EXTERNAL (decl) = 1;
9503 DECL_TLS_MODEL (decl) = decl_default_tls_model (decl);
9508 error ("non-static data member %qE declared %<constexpr%>",
9510 decl = build_decl (input_location,
9511 FIELD_DECL, unqualified_id, type);
9512 DECL_NONADDRESSABLE_P (decl) = bitfield;
9513 if (bitfield && !unqualified_id)
9514 TREE_NO_WARNING (decl) = 1;
9516 if (storage_class == sc_mutable)
9518 DECL_MUTABLE_P (decl) = 1;
9519 storage_class = sc_none;
9523 bad_specifiers (decl, "field", virtualp,
9524 memfn_quals != TYPE_UNQUALIFIED,
9525 inlinep, friendp, raises != NULL_TREE);
9528 else if (TREE_CODE (type) == FUNCTION_TYPE
9529 || TREE_CODE (type) == METHOD_TYPE)
9534 if (!unqualified_id)
9535 return error_mark_node;
9537 if (TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR)
9538 original_name = dname;
9540 original_name = unqualified_id;
9542 if (storage_class == sc_auto)
9543 error ("storage class %<auto%> invalid for function %qs", name);
9544 else if (storage_class == sc_register)
9545 error ("storage class %<register%> invalid for function %qs", name);
9547 error ("storage class %<__thread%> invalid for function %qs", name);
9549 /* Function declaration not at top level.
9550 Storage classes other than `extern' are not allowed
9551 and `extern' makes no difference. */
9552 if (! toplevel_bindings_p ()
9553 && (storage_class == sc_static
9554 || declspecs->specs[(int)ds_inline])
9557 if (storage_class == sc_static)
9558 pedwarn (input_location, OPT_pedantic,
9559 "%<static%> specified invalid for function %qs "
9560 "declared out of global scope", name);
9562 pedwarn (input_location, OPT_pedantic,
9563 "%<inline%> specifier invalid for function %qs "
9564 "declared out of global scope", name);
9567 if (ctype != NULL_TREE
9568 && TREE_CODE (ctype) != NAMESPACE_DECL && !MAYBE_CLASS_TYPE_P (ctype))
9570 error ("%q#T is not a class or a namespace", ctype);
9574 if (ctype == NULL_TREE)
9578 error ("virtual non-class function %qs", name);
9581 else if (sfk == sfk_constructor
9582 || sfk == sfk_destructor)
9585 ? "%qs defined in a non-class scope"
9586 : "%qs declared in a non-class scope", name);
9590 else if (TREE_CODE (type) == FUNCTION_TYPE && staticp < 2
9591 && !NEW_DELETE_OPNAME_P (original_name))
9592 type = build_method_type_directly (ctype,
9594 TYPE_ARG_TYPES (type));
9596 /* Record presence of `static'. */
9597 publicp = (ctype != NULL_TREE
9598 || storage_class == sc_extern
9599 || storage_class != sc_static);
9601 decl = grokfndecl (ctype, type, original_name, parms, unqualified_id,
9602 virtualp, flags, memfn_quals, raises,
9604 publicp, inlinep || constexpr_p, sfk, funcdef_flag,
9605 template_count, in_namespace, attrlist,
9606 declarator->id_loc);
9607 if (decl == NULL_TREE)
9608 return error_mark_node;
9612 int invalid_static = 0;
9614 /* Don't allow a static member function in a class, and forbid
9615 declaring main to be static. */
9616 if (TREE_CODE (type) == METHOD_TYPE)
9618 permerror (input_location, "cannot declare member function %qD to have "
9619 "static linkage", decl);
9622 else if (current_function_decl)
9624 /* FIXME need arm citation */
9625 error ("cannot declare static function inside another function");
9632 storage_class = sc_none;
9638 /* It's a variable. */
9640 /* An uninitialized decl with `extern' is a reference. */
9641 decl = grokvardecl (type, unqualified_id,
9644 (type_quals & TYPE_QUAL_CONST) != 0,
9645 ctype ? ctype : in_namespace);
9646 bad_specifiers (decl, "variable", virtualp,
9647 memfn_quals != TYPE_UNQUALIFIED,
9648 inlinep, friendp, raises != NULL_TREE);
9652 DECL_CONTEXT (decl) = ctype;
9655 permerror (input_location, "%<static%> may not be used when defining "
9656 "(as opposed to declaring) a static data member");
9658 storage_class = sc_none;
9660 if (storage_class == sc_register && TREE_STATIC (decl))
9662 error ("static member %qD declared %<register%>", decl);
9663 storage_class = sc_none;
9665 if (storage_class == sc_extern && pedantic)
9667 pedwarn (input_location, OPT_pedantic,
9668 "cannot explicitly declare member %q#D to have "
9669 "extern linkage", decl);
9670 storage_class = sc_none;
9675 if (storage_class == sc_extern && initialized && !funcdef_flag)
9677 if (toplevel_bindings_p ())
9679 /* It's common practice (and completely valid) to have a const
9680 be initialized and declared extern. */
9681 if (!(type_quals & TYPE_QUAL_CONST))
9682 warning (0, "%qs initialized and declared %<extern%>", name);
9686 error ("%qs has both %<extern%> and initializer", name);
9687 return error_mark_node;
9691 /* Record `register' declaration for warnings on &
9692 and in case doing stupid register allocation. */
9694 if (storage_class == sc_register)
9695 DECL_REGISTER (decl) = 1;
9696 else if (storage_class == sc_extern)
9697 DECL_THIS_EXTERN (decl) = 1;
9698 else if (storage_class == sc_static)
9699 DECL_THIS_STATIC (decl) = 1;
9701 /* Don't forget constexprness. */
9702 if (VAR_OR_FUNCTION_DECL_P (decl))
9703 DECL_DECLARED_CONSTEXPR_P (decl) = constexpr_p;
9705 /* Record constancy and volatility on the DECL itself . There's
9706 no need to do this when processing a template; we'll do this
9707 for the instantiated declaration based on the type of DECL. */
9708 if (!processing_template_decl)
9709 cp_apply_type_quals_to_decl (type_quals, decl);
9715 /* Subroutine of start_function. Ensure that each of the parameter
9716 types (as listed in PARMS) is complete, as is required for a
9717 function definition. */
9720 require_complete_types_for_parms (tree parms)
9722 for (; parms; parms = TREE_CHAIN (parms))
9724 if (dependent_type_p (TREE_TYPE (parms)))
9726 if (!VOID_TYPE_P (TREE_TYPE (parms))
9727 && complete_type_or_else (TREE_TYPE (parms), parms))
9729 relayout_decl (parms);
9730 DECL_ARG_TYPE (parms) = type_passed_as (TREE_TYPE (parms));
9733 /* grokparms or complete_type_or_else will have already issued
9735 TREE_TYPE (parms) = error_mark_node;
9739 /* Returns nonzero if T is a local variable. */
9742 local_variable_p (const_tree t)
9744 if ((TREE_CODE (t) == VAR_DECL
9745 /* A VAR_DECL with a context that is a _TYPE is a static data
9747 && !TYPE_P (CP_DECL_CONTEXT (t))
9748 /* Any other non-local variable must be at namespace scope. */
9749 && !DECL_NAMESPACE_SCOPE_P (t))
9750 || (TREE_CODE (t) == PARM_DECL))
9756 /* Like local_variable_p, but suitable for use as a tree-walking
9760 local_variable_p_walkfn (tree *tp, int *walk_subtrees,
9761 void *data ATTRIBUTE_UNUSED)
9763 if (local_variable_p (*tp) && !DECL_ARTIFICIAL (*tp))
9765 else if (TYPE_P (*tp))
9772 /* Check that ARG, which is a default-argument expression for a
9773 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
9774 something goes wrong. DECL may also be a _TYPE node, rather than a
9775 DECL, if there is no DECL available. */
9778 check_default_argument (tree decl, tree arg)
9783 if (TREE_CODE (arg) == DEFAULT_ARG)
9784 /* We get a DEFAULT_ARG when looking at an in-class declaration
9785 with a default argument. Ignore the argument for now; we'll
9786 deal with it after the class is complete. */
9795 decl_type = TREE_TYPE (decl);
9797 if (arg == error_mark_node
9798 || decl == error_mark_node
9799 || TREE_TYPE (arg) == error_mark_node
9800 || decl_type == error_mark_node)
9801 /* Something already went wrong. There's no need to check
9803 return error_mark_node;
9805 /* [dcl.fct.default]
9807 A default argument expression is implicitly converted to the
9809 if (!TREE_TYPE (arg)
9810 || !can_convert_arg (decl_type, TREE_TYPE (arg), arg, LOOKUP_NORMAL))
9813 error ("default argument for %q#D has type %qT",
9814 decl, TREE_TYPE (arg));
9816 error ("default argument for parameter of type %qT has type %qT",
9817 decl_type, TREE_TYPE (arg));
9819 return error_mark_node;
9822 /* [dcl.fct.default]
9824 Local variables shall not be used in default argument
9827 The keyword `this' shall not be used in a default argument of a
9829 var = cp_walk_tree_without_duplicates (&arg, local_variable_p_walkfn, NULL);
9832 error ("default argument %qE uses local variable %qD", arg, var);
9833 return error_mark_node;
9840 /* Returns a deprecated type used within TYPE, or NULL_TREE if none. */
9843 type_is_deprecated (tree type)
9845 enum tree_code code;
9846 if (TREE_DEPRECATED (type))
9848 if (TYPE_NAME (type)
9849 && TREE_DEPRECATED (TYPE_NAME (type)))
9852 /* Do warn about using typedefs to a deprecated class. */
9853 if (TAGGED_TYPE_P (type) && type != TYPE_MAIN_VARIANT (type))
9854 return type_is_deprecated (TYPE_MAIN_VARIANT (type));
9856 code = TREE_CODE (type);
9858 if (code == POINTER_TYPE || code == REFERENCE_TYPE
9859 || code == OFFSET_TYPE || code == FUNCTION_TYPE
9860 || code == METHOD_TYPE || code == ARRAY_TYPE)
9861 return type_is_deprecated (TREE_TYPE (type));
9863 if (TYPE_PTRMEMFUNC_P (type))
9864 return type_is_deprecated
9865 (TREE_TYPE (TREE_TYPE (TYPE_PTRMEMFUNC_FN_TYPE (type))));
9870 /* Decode the list of parameter types for a function type.
9871 Given the list of things declared inside the parens,
9872 return a list of types.
9874 If this parameter does not end with an ellipsis, we append
9877 *PARMS is set to the chain of PARM_DECLs created. */
9880 grokparms (tree parmlist, tree *parms)
9882 tree result = NULL_TREE;
9883 tree decls = NULL_TREE;
9887 for (parm = parmlist; parm != NULL_TREE; parm = TREE_CHAIN (parm))
9889 tree type = NULL_TREE;
9890 tree init = TREE_PURPOSE (parm);
9891 tree decl = TREE_VALUE (parm);
9894 if (parm == void_list_node)
9897 if (! decl || TREE_TYPE (decl) == error_mark_node)
9900 type = TREE_TYPE (decl);
9901 if (VOID_TYPE_P (type))
9903 if (same_type_p (type, void_type_node)
9904 && DECL_SELF_REFERENCE_P (type)
9905 && !DECL_NAME (decl) && !result && TREE_CHAIN (parm) == void_list_node)
9906 /* this is a parmlist of `(void)', which is ok. */
9908 cxx_incomplete_type_error (decl, type);
9909 /* It's not a good idea to actually create parameters of
9910 type `void'; other parts of the compiler assume that a
9911 void type terminates the parameter list. */
9912 type = error_mark_node;
9913 TREE_TYPE (decl) = error_mark_node;
9916 if (type != error_mark_node
9917 && TYPE_FOR_JAVA (type)
9918 && MAYBE_CLASS_TYPE_P (type))
9920 error ("parameter %qD has Java class type", decl);
9921 type = error_mark_node;
9922 TREE_TYPE (decl) = error_mark_node;
9926 if (type != error_mark_node
9927 && (errmsg = targetm.invalid_parameter_type (type)))
9930 type = error_mark_node;
9931 TREE_TYPE (decl) = error_mark_node;
9934 if (type != error_mark_node)
9936 if (deprecated_state != DEPRECATED_SUPPRESS)
9938 tree deptype = type_is_deprecated (type);
9940 warn_deprecated_use (deptype, NULL_TREE);
9943 /* Top-level qualifiers on the parameters are
9944 ignored for function types. */
9945 type = cp_build_qualified_type (type, 0);
9946 if (TREE_CODE (type) == METHOD_TYPE)
9948 error ("parameter %qD invalidly declared method type", decl);
9949 type = build_pointer_type (type);
9950 TREE_TYPE (decl) = type;
9952 else if (abstract_virtuals_error (decl, type))
9953 any_error = 1; /* Seems like a good idea. */
9954 else if (POINTER_TYPE_P (type))
9956 /* [dcl.fct]/6, parameter types cannot contain pointers
9957 (references) to arrays of unknown bound. */
9958 tree t = TREE_TYPE (type);
9959 int ptr = TYPE_PTR_P (type);
9965 else if (TREE_CODE (t) != ARRAY_TYPE)
9967 else if (!TYPE_DOMAIN (t))
9971 if (TREE_CODE (t) == ARRAY_TYPE)
9973 ? G_("parameter %qD includes pointer to array of "
9974 "unknown bound %qT")
9975 : G_("parameter %qD includes reference to array of "
9976 "unknown bound %qT"),
9982 else if (init && !processing_template_decl)
9983 init = check_default_argument (decl, init);
9986 if (TREE_CODE (decl) == PARM_DECL
9987 && FUNCTION_PARAMETER_PACK_P (decl)
9988 && TREE_CHAIN (parm)
9989 && TREE_CHAIN (parm) != void_list_node)
9990 error ("parameter packs must be at the end of the parameter list");
9992 TREE_CHAIN (decl) = decls;
9994 result = tree_cons (init, type, result);
9996 decls = nreverse (decls);
9997 result = nreverse (result);
9999 result = chainon (result, void_list_node);
10006 /* D is a constructor or overloaded `operator='.
10008 Let T be the class in which D is declared. Then, this function
10011 -1 if D's is an ill-formed constructor or copy assignment operator
10012 whose first parameter is of type `T'.
10013 0 if D is not a copy constructor or copy assignment
10015 1 if D is a copy constructor or copy assignment operator whose
10016 first parameter is a reference to non-const qualified T.
10017 2 if D is a copy constructor or copy assignment operator whose
10018 first parameter is a reference to const qualified T.
10020 This function can be used as a predicate. Positive values indicate
10021 a copy constructor and nonzero values indicate a copy assignment
10025 copy_fn_p (const_tree d)
10031 gcc_assert (DECL_FUNCTION_MEMBER_P (d));
10033 if (TREE_CODE (d) == TEMPLATE_DECL
10034 || (DECL_TEMPLATE_INFO (d)
10035 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d))))
10036 /* Instantiations of template member functions are never copy
10037 functions. Note that member functions of templated classes are
10038 represented as template functions internally, and we must
10039 accept those as copy functions. */
10042 args = FUNCTION_FIRST_USER_PARMTYPE (d);
10046 arg_type = TREE_VALUE (args);
10047 if (arg_type == error_mark_node)
10050 if (TYPE_MAIN_VARIANT (arg_type) == DECL_CONTEXT (d))
10052 /* Pass by value copy assignment operator. */
10055 else if (TREE_CODE (arg_type) == REFERENCE_TYPE
10056 && !TYPE_REF_IS_RVALUE (arg_type)
10057 && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type)) == DECL_CONTEXT (d))
10059 if (CP_TYPE_CONST_P (TREE_TYPE (arg_type)))
10065 args = TREE_CHAIN (args);
10067 if (args && args != void_list_node && !TREE_PURPOSE (args))
10068 /* There are more non-optional args. */
10074 /* D is a constructor or overloaded `operator='.
10076 Let T be the class in which D is declared. Then, this function
10077 returns true when D is a move constructor or move assignment
10078 operator, false otherwise. */
10081 move_fn_p (const_tree d)
10085 bool result = false;
10087 gcc_assert (DECL_FUNCTION_MEMBER_P (d));
10089 if (cxx_dialect == cxx98)
10090 /* There are no move constructors if we are in C++98 mode. */
10093 if (TREE_CODE (d) == TEMPLATE_DECL
10094 || (DECL_TEMPLATE_INFO (d)
10095 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d))))
10096 /* Instantiations of template member functions are never copy
10097 functions. Note that member functions of templated classes are
10098 represented as template functions internally, and we must
10099 accept those as copy functions. */
10102 args = FUNCTION_FIRST_USER_PARMTYPE (d);
10106 arg_type = TREE_VALUE (args);
10107 if (arg_type == error_mark_node)
10110 if (TREE_CODE (arg_type) == REFERENCE_TYPE
10111 && TYPE_REF_IS_RVALUE (arg_type)
10112 && same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (arg_type)),
10116 args = TREE_CHAIN (args);
10118 if (args && args != void_list_node && !TREE_PURPOSE (args))
10119 /* There are more non-optional args. */
10125 /* Remember any special properties of member function DECL. */
10128 grok_special_member_properties (tree decl)
10132 if (!DECL_NONSTATIC_MEMBER_FUNCTION_P (decl))
10135 class_type = DECL_CONTEXT (decl);
10136 if (DECL_CONSTRUCTOR_P (decl))
10138 int ctor = copy_fn_p (decl);
10140 if (!DECL_ARTIFICIAL (decl))
10141 TYPE_HAS_USER_CONSTRUCTOR (class_type) = 1;
10147 A non-template constructor for class X is a copy
10148 constructor if its first parameter is of type X&, const
10149 X&, volatile X& or const volatile X&, and either there
10150 are no other parameters or else all other parameters have
10151 default arguments. */
10152 TYPE_HAS_INIT_REF (class_type) = 1;
10153 if (user_provided_p (decl))
10154 TYPE_HAS_COMPLEX_INIT_REF (class_type) = 1;
10156 TYPE_HAS_CONST_INIT_REF (class_type) = 1;
10158 else if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl)))
10160 TYPE_HAS_DEFAULT_CONSTRUCTOR (class_type) = 1;
10161 if (user_provided_p (decl))
10162 TYPE_HAS_COMPLEX_DFLT (class_type) = 1;
10164 else if (is_list_ctor (decl))
10165 TYPE_HAS_LIST_CTOR (class_type) = 1;
10167 else if (DECL_OVERLOADED_OPERATOR_P (decl) == NOP_EXPR)
10171 A non-template assignment operator for class X is a copy
10172 assignment operator if its parameter is of type X, X&, const
10173 X&, volatile X& or const volatile X&. */
10175 int assop = copy_fn_p (decl);
10179 TYPE_HAS_ASSIGN_REF (class_type) = 1;
10180 if (user_provided_p (decl))
10181 TYPE_HAS_COMPLEX_ASSIGN_REF (class_type) = 1;
10183 TYPE_HAS_CONST_ASSIGN_REF (class_type) = 1;
10188 /* Check a constructor DECL has the correct form. Complains
10189 if the class has a constructor of the form X(X). */
10192 grok_ctor_properties (const_tree ctype, const_tree decl)
10194 int ctor_parm = copy_fn_p (decl);
10200 A declaration of a constructor for a class X is ill-formed if
10201 its first parameter is of type (optionally cv-qualified) X
10202 and either there are no other parameters or else all other
10203 parameters have default arguments.
10205 We *don't* complain about member template instantiations that
10206 have this form, though; they can occur as we try to decide
10207 what constructor to use during overload resolution. Since
10208 overload resolution will never prefer such a constructor to
10209 the non-template copy constructor (which is either explicitly
10210 or implicitly defined), there's no need to worry about their
10211 existence. Theoretically, they should never even be
10212 instantiated, but that's hard to forestall. */
10213 error ("invalid constructor; you probably meant %<%T (const %T&)%>",
10221 /* An operator with this code is unary, but can also be binary. */
10224 ambi_op_p (enum tree_code code)
10226 return (code == INDIRECT_REF
10227 || code == ADDR_EXPR
10228 || code == UNARY_PLUS_EXPR
10229 || code == NEGATE_EXPR
10230 || code == PREINCREMENT_EXPR
10231 || code == PREDECREMENT_EXPR);
10234 /* An operator with this name can only be unary. */
10237 unary_op_p (enum tree_code code)
10239 return (code == TRUTH_NOT_EXPR
10240 || code == BIT_NOT_EXPR
10241 || code == COMPONENT_REF
10242 || code == TYPE_EXPR);
10245 /* DECL is a declaration for an overloaded operator. If COMPLAIN is true,
10246 errors are issued for invalid declarations. */
10249 grok_op_properties (tree decl, bool complain)
10251 tree argtypes = TYPE_ARG_TYPES (TREE_TYPE (decl));
10253 int methodp = (TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE);
10254 tree name = DECL_NAME (decl);
10255 enum tree_code operator_code;
10260 /* Count the number of arguments and check for ellipsis. */
10261 for (argtype = argtypes, arity = 0;
10262 argtype && argtype != void_list_node;
10263 argtype = TREE_CHAIN (argtype))
10265 ellipsis_p = !argtype;
10267 class_type = DECL_CONTEXT (decl);
10268 if (class_type && !CLASS_TYPE_P (class_type))
10269 class_type = NULL_TREE;
10271 if (DECL_CONV_FN_P (decl))
10272 operator_code = TYPE_EXPR;
10276 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
10277 if (ansi_opname (CODE) == name) \
10279 operator_code = (CODE); \
10282 else if (ansi_assopname (CODE) == name) \
10284 operator_code = (CODE); \
10285 DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
10289 #include "operators.def"
10290 #undef DEF_OPERATOR
10292 gcc_unreachable ();
10295 gcc_assert (operator_code != MAX_TREE_CODES);
10296 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
10299 switch (operator_code)
10302 TYPE_HAS_NEW_OPERATOR (class_type) = 1;
10306 TYPE_GETS_DELETE (class_type) |= 1;
10310 TYPE_HAS_ARRAY_NEW_OPERATOR (class_type) = 1;
10313 case VEC_DELETE_EXPR:
10314 TYPE_GETS_DELETE (class_type) |= 2;
10321 /* [basic.std.dynamic.allocation]/1:
10323 A program is ill-formed if an allocation function is declared
10324 in a namespace scope other than global scope or declared static
10327 The same also holds true for deallocation functions. */
10328 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR
10329 || operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
10331 if (DECL_NAMESPACE_SCOPE_P (decl))
10333 if (CP_DECL_CONTEXT (decl) != global_namespace)
10335 error ("%qD may not be declared within a namespace", decl);
10338 else if (!TREE_PUBLIC (decl))
10340 error ("%qD may not be declared as static", decl);
10346 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR)
10348 TREE_TYPE (decl) = coerce_new_type (TREE_TYPE (decl));
10349 DECL_IS_OPERATOR_NEW (decl) = 1;
10351 else if (operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
10352 TREE_TYPE (decl) = coerce_delete_type (TREE_TYPE (decl));
10355 /* An operator function must either be a non-static member function
10356 or have at least one parameter of a class, a reference to a class,
10357 an enumeration, or a reference to an enumeration. 13.4.0.6 */
10358 if (! methodp || DECL_STATIC_FUNCTION_P (decl))
10360 if (operator_code == TYPE_EXPR
10361 || operator_code == CALL_EXPR
10362 || operator_code == COMPONENT_REF
10363 || operator_code == ARRAY_REF
10364 || operator_code == NOP_EXPR)
10366 error ("%qD must be a nonstatic member function", decl);
10373 if (DECL_STATIC_FUNCTION_P (decl))
10375 error ("%qD must be either a non-static member "
10376 "function or a non-member function", decl);
10380 for (p = argtypes; p && p != void_list_node; p = TREE_CHAIN (p))
10382 tree arg = non_reference (TREE_VALUE (p));
10383 if (arg == error_mark_node)
10386 /* MAYBE_CLASS_TYPE_P, rather than CLASS_TYPE_P, is used
10387 because these checks are performed even on
10388 template functions. */
10389 if (MAYBE_CLASS_TYPE_P (arg)
10390 || TREE_CODE (arg) == ENUMERAL_TYPE)
10394 if (!p || p == void_list_node)
10397 error ("%qD must have an argument of class or "
10398 "enumerated type", decl);
10404 /* There are no restrictions on the arguments to an overloaded
10406 if (operator_code == CALL_EXPR)
10409 /* Warn about conversion operators that will never be used. */
10410 if (IDENTIFIER_TYPENAME_P (name)
10411 && ! DECL_TEMPLATE_INFO (decl)
10413 /* Warn only declaring the function; there is no need to
10414 warn again about out-of-class definitions. */
10415 && class_type == current_class_type)
10417 tree t = TREE_TYPE (name);
10418 int ref = (TREE_CODE (t) == REFERENCE_TYPE);
10421 t = TYPE_MAIN_VARIANT (TREE_TYPE (t));
10423 if (TREE_CODE (t) == VOID_TYPE)
10424 warning (OPT_Wconversion,
10426 ? G_("conversion to a reference to void "
10427 "will never use a type conversion operator")
10428 : G_("conversion to void "
10429 "will never use a type conversion operator"));
10430 else if (class_type)
10432 if (t == class_type)
10433 warning (OPT_Wconversion,
10435 ? G_("conversion to a reference to the same type "
10436 "will never use a type conversion operator")
10437 : G_("conversion to the same type "
10438 "will never use a type conversion operator"));
10439 /* Don't force t to be complete here. */
10440 else if (MAYBE_CLASS_TYPE_P (t)
10441 && COMPLETE_TYPE_P (t)
10442 && DERIVED_FROM_P (t, class_type))
10443 warning (OPT_Wconversion,
10445 ? G_("conversion to a reference to a base class "
10446 "will never use a type conversion operator")
10447 : G_("conversion to a base class "
10448 "will never use a type conversion operator"));
10453 if (operator_code == COND_EXPR)
10456 error ("ISO C++ prohibits overloading operator ?:");
10459 else if (ellipsis_p)
10461 error ("%qD must not have variable number of arguments", decl);
10464 else if (ambi_op_p (operator_code))
10467 /* We pick the one-argument operator codes by default, so
10468 we don't have to change anything. */
10470 else if (arity == 2)
10472 /* If we thought this was a unary operator, we now know
10473 it to be a binary operator. */
10474 switch (operator_code)
10477 operator_code = MULT_EXPR;
10481 operator_code = BIT_AND_EXPR;
10484 case UNARY_PLUS_EXPR:
10485 operator_code = PLUS_EXPR;
10489 operator_code = MINUS_EXPR;
10492 case PREINCREMENT_EXPR:
10493 operator_code = POSTINCREMENT_EXPR;
10496 case PREDECREMENT_EXPR:
10497 operator_code = POSTDECREMENT_EXPR;
10501 gcc_unreachable ();
10504 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
10506 if ((operator_code == POSTINCREMENT_EXPR
10507 || operator_code == POSTDECREMENT_EXPR)
10508 && ! processing_template_decl
10509 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes)), integer_type_node))
10512 error ("postfix %qD must take %<int%> as its argument",
10515 error ("postfix %qD must take %<int%> as its second "
10523 error ("%qD must take either zero or one argument", decl);
10525 error ("%qD must take either one or two arguments", decl);
10529 /* More Effective C++ rule 6. */
10531 && (operator_code == POSTINCREMENT_EXPR
10532 || operator_code == POSTDECREMENT_EXPR
10533 || operator_code == PREINCREMENT_EXPR
10534 || operator_code == PREDECREMENT_EXPR))
10536 tree arg = TREE_VALUE (argtypes);
10537 tree ret = TREE_TYPE (TREE_TYPE (decl));
10538 if (methodp || TREE_CODE (arg) == REFERENCE_TYPE)
10539 arg = TREE_TYPE (arg);
10540 arg = TYPE_MAIN_VARIANT (arg);
10541 if (operator_code == PREINCREMENT_EXPR
10542 || operator_code == PREDECREMENT_EXPR)
10544 if (TREE_CODE (ret) != REFERENCE_TYPE
10545 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret)),
10547 warning (OPT_Weffc__, "prefix %qD should return %qT", decl,
10548 build_reference_type (arg));
10552 if (!same_type_p (TYPE_MAIN_VARIANT (ret), arg))
10553 warning (OPT_Weffc__, "postfix %qD should return %qT", decl, arg);
10557 else if (unary_op_p (operator_code))
10562 error ("%qD must take %<void%>", decl);
10564 error ("%qD must take exactly one argument", decl);
10568 else /* if (binary_op_p (operator_code)) */
10573 error ("%qD must take exactly one argument", decl);
10575 error ("%qD must take exactly two arguments", decl);
10579 /* More Effective C++ rule 7. */
10581 && (operator_code == TRUTH_ANDIF_EXPR
10582 || operator_code == TRUTH_ORIF_EXPR
10583 || operator_code == COMPOUND_EXPR))
10584 warning (OPT_Weffc__, "user-defined %qD always evaluates both arguments",
10588 /* Effective C++ rule 23. */
10591 && !DECL_ASSIGNMENT_OPERATOR_P (decl)
10592 && (operator_code == PLUS_EXPR
10593 || operator_code == MINUS_EXPR
10594 || operator_code == TRUNC_DIV_EXPR
10595 || operator_code == MULT_EXPR
10596 || operator_code == TRUNC_MOD_EXPR)
10597 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl))) == REFERENCE_TYPE)
10598 warning (OPT_Weffc__, "%qD should return by value", decl);
10600 /* [over.oper]/8 */
10601 for (; argtypes && argtypes != void_list_node;
10602 argtypes = TREE_CHAIN (argtypes))
10603 if (TREE_PURPOSE (argtypes))
10605 TREE_PURPOSE (argtypes) = NULL_TREE;
10606 if (operator_code == POSTINCREMENT_EXPR
10607 || operator_code == POSTDECREMENT_EXPR)
10609 pedwarn (input_location, OPT_pedantic, "%qD cannot have default arguments",
10614 error ("%qD cannot have default arguments", decl);
10622 /* Return a string giving the keyword associate with CODE. */
10624 static const char *
10625 tag_name (enum tag_types code)
10637 case typename_type:
10640 gcc_unreachable ();
10644 /* Name lookup in an elaborated-type-specifier (after the keyword
10645 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
10646 elaborated-type-specifier is invalid, issue a diagnostic and return
10647 error_mark_node; otherwise, return the *_TYPE to which it referred.
10648 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
10651 check_elaborated_type_specifier (enum tag_types tag_code,
10653 bool allow_template_p)
10659 struct S { struct S *p; };
10661 name lookup will find the TYPE_DECL for the implicit "S::S"
10662 typedef. Adjust for that here. */
10663 if (DECL_SELF_REFERENCE_P (decl))
10664 decl = TYPE_NAME (TREE_TYPE (decl));
10666 type = TREE_TYPE (decl);
10668 /* Check TEMPLATE_TYPE_PARM first because DECL_IMPLICIT_TYPEDEF_P
10669 is false for this case as well. */
10670 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
10672 error ("using template type parameter %qT after %qs",
10673 type, tag_name (tag_code));
10674 return error_mark_node;
10678 If the identifier resolves to a typedef-name or a template
10679 type-parameter, the elaborated-type-specifier is ill-formed.
10681 In other words, the only legitimate declaration to use in the
10682 elaborated type specifier is the implicit typedef created when
10683 the type is declared. */
10684 else if (!DECL_IMPLICIT_TYPEDEF_P (decl)
10685 && !DECL_SELF_REFERENCE_P (decl)
10686 && tag_code != typename_type)
10688 error ("using typedef-name %qD after %qs", decl, tag_name (tag_code));
10689 error ("%q+D has a previous declaration here", decl);
10690 return error_mark_node;
10692 else if (TREE_CODE (type) != RECORD_TYPE
10693 && TREE_CODE (type) != UNION_TYPE
10694 && tag_code != enum_type
10695 && tag_code != typename_type)
10697 error ("%qT referred to as %qs", type, tag_name (tag_code));
10698 error ("%q+T has a previous declaration here", type);
10699 return error_mark_node;
10701 else if (TREE_CODE (type) != ENUMERAL_TYPE
10702 && tag_code == enum_type)
10704 error ("%qT referred to as enum", type);
10705 error ("%q+T has a previous declaration here", type);
10706 return error_mark_node;
10708 else if (!allow_template_p
10709 && TREE_CODE (type) == RECORD_TYPE
10710 && CLASSTYPE_IS_TEMPLATE (type))
10712 /* If a class template appears as elaborated type specifier
10713 without a template header such as:
10715 template <class T> class C {};
10716 void f(class C); // No template header here
10718 then the required template argument is missing. */
10719 error ("template argument required for %<%s %T%>",
10720 tag_name (tag_code),
10721 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type)));
10722 return error_mark_node;
10728 /* Lookup NAME in elaborate type specifier in scope according to
10729 SCOPE and issue diagnostics if necessary.
10730 Return *_TYPE node upon success, NULL_TREE when the NAME is not
10731 found, and ERROR_MARK_NODE for type error. */
10734 lookup_and_check_tag (enum tag_types tag_code, tree name,
10735 tag_scope scope, bool template_header_p)
10739 if (scope == ts_global)
10741 /* First try ordinary name lookup, ignoring hidden class name
10742 injected via friend declaration. */
10743 decl = lookup_name_prefer_type (name, 2);
10744 /* If that fails, the name will be placed in the smallest
10745 non-class, non-function-prototype scope according to 3.3.1/5.
10746 We may already have a hidden name declared as friend in this
10747 scope. So lookup again but not ignoring hidden names.
10748 If we find one, that name will be made visible rather than
10749 creating a new tag. */
10751 decl = lookup_type_scope (name, ts_within_enclosing_non_class);
10754 decl = lookup_type_scope (name, scope);
10756 if (decl && DECL_CLASS_TEMPLATE_P (decl))
10757 decl = DECL_TEMPLATE_RESULT (decl);
10759 if (decl && TREE_CODE (decl) == TYPE_DECL)
10761 /* Look for invalid nested type:
10765 if (scope == ts_current && DECL_SELF_REFERENCE_P (decl))
10767 error ("%qD has the same name as the class in which it is "
10770 return error_mark_node;
10773 /* Two cases we need to consider when deciding if a class
10774 template is allowed as an elaborated type specifier:
10775 1. It is a self reference to its own class.
10776 2. It comes with a template header.
10780 template <class T> class C {
10781 class C *c1; // DECL_SELF_REFERENCE_P is true
10784 template <class U> class C; // template_header_p is true
10785 template <class T> class C<T>::D {
10786 class C *c2; // DECL_SELF_REFERENCE_P is true
10789 t = check_elaborated_type_specifier (tag_code,
10792 | DECL_SELF_REFERENCE_P (decl));
10795 else if (decl && TREE_CODE (decl) == TREE_LIST)
10797 error ("reference to %qD is ambiguous", name);
10798 print_candidates (decl);
10799 return error_mark_node;
10805 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
10806 Define the tag as a forward-reference if it is not defined.
10808 If a declaration is given, process it here, and report an error if
10809 multiple declarations are not identical.
10811 SCOPE is TS_CURRENT when this is also a definition. Only look in
10812 the current frame for the name (since C++ allows new names in any
10813 scope.) It is TS_WITHIN_ENCLOSING_NON_CLASS if this is a friend
10814 declaration. Only look beginning from the current scope outward up
10815 till the nearest non-class scope. Otherwise it is TS_GLOBAL.
10817 TEMPLATE_HEADER_P is true when this declaration is preceded by
10818 a set of template parameters. */
10821 xref_tag (enum tag_types tag_code, tree name,
10822 tag_scope scope, bool template_header_p)
10824 enum tree_code code;
10826 tree context = NULL_TREE;
10828 timevar_push (TV_NAME_LOOKUP);
10830 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
10836 code = RECORD_TYPE;
10842 code = ENUMERAL_TYPE;
10845 gcc_unreachable ();
10848 /* In case of anonymous name, xref_tag is only called to
10849 make type node and push name. Name lookup is not required. */
10850 if (ANON_AGGRNAME_P (name))
10853 t = lookup_and_check_tag (tag_code, name,
10854 scope, template_header_p);
10856 if (t == error_mark_node)
10857 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
10859 if (scope != ts_current && t && current_class_type
10860 && template_class_depth (current_class_type)
10861 && template_header_p)
10863 /* Since SCOPE is not TS_CURRENT, we are not looking at a
10864 definition of this tag. Since, in addition, we are currently
10865 processing a (member) template declaration of a template
10866 class, we must be very careful; consider:
10873 { template <class V>
10874 friend struct S1; };
10876 Here, the S2::S1 declaration should not be confused with the
10877 outer declaration. In particular, the inner version should
10878 have a template parameter of level 2, not level 1. This
10879 would be particularly important if the member declaration
10882 template <class V = U> friend struct S1;
10884 say, when we should tsubst into `U' when instantiating
10885 S2. On the other hand, when presented with:
10895 we must find the inner binding eventually. We
10896 accomplish this by making sure that the new type we
10897 create to represent this declaration has the right
10899 context = TYPE_CONTEXT (t);
10905 /* If no such tag is yet defined, create a forward-reference node
10906 and record it as the "definition".
10907 When a real declaration of this type is found,
10908 the forward-reference will be altered into a real type. */
10909 if (code == ENUMERAL_TYPE)
10911 error ("use of enum %q#D without previous declaration", name);
10912 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
10916 t = make_class_type (code);
10917 TYPE_CONTEXT (t) = context;
10918 t = pushtag (name, t, scope);
10923 if (template_header_p && MAYBE_CLASS_TYPE_P (t))
10925 if (!redeclare_class_template (t, current_template_parms))
10926 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
10928 else if (!processing_template_decl
10929 && CLASS_TYPE_P (t)
10930 && CLASSTYPE_IS_TEMPLATE (t))
10932 error ("redeclaration of %qT as a non-template", t);
10933 error ("previous declaration %q+D", t);
10934 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
10937 /* Make injected friend class visible. */
10938 if (scope != ts_within_enclosing_non_class
10939 && hidden_name_p (TYPE_NAME (t)))
10941 DECL_ANTICIPATED (TYPE_NAME (t)) = 0;
10942 DECL_FRIEND_P (TYPE_NAME (t)) = 0;
10944 if (TYPE_TEMPLATE_INFO (t))
10946 DECL_ANTICIPATED (TYPE_TI_TEMPLATE (t)) = 0;
10947 DECL_FRIEND_P (TYPE_TI_TEMPLATE (t)) = 0;
10952 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, t);
10956 xref_tag_from_type (tree old, tree id, tag_scope scope)
10958 enum tag_types tag_kind;
10960 if (TREE_CODE (old) == RECORD_TYPE)
10961 tag_kind = (CLASSTYPE_DECLARED_CLASS (old) ? class_type : record_type);
10963 tag_kind = union_type;
10965 if (id == NULL_TREE)
10966 id = TYPE_IDENTIFIER (old);
10968 return xref_tag (tag_kind, id, scope, false);
10971 /* Create the binfo hierarchy for REF with (possibly NULL) base list
10972 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
10973 access_* node, and the TREE_VALUE is the type of the base-class.
10974 Non-NULL TREE_TYPE indicates virtual inheritance.
10976 Returns true if the binfo hierarchy was successfully created,
10977 false if an error was detected. */
10980 xref_basetypes (tree ref, tree base_list)
10983 tree binfo, base_binfo;
10984 unsigned max_vbases = 0; /* Maximum direct & indirect virtual bases. */
10985 unsigned max_bases = 0; /* Maximum direct bases. */
10987 tree default_access;
10988 tree igo_prev; /* Track Inheritance Graph Order. */
10990 if (ref == error_mark_node)
10993 /* The base of a derived class is private by default, all others are
10995 default_access = (TREE_CODE (ref) == RECORD_TYPE
10996 && CLASSTYPE_DECLARED_CLASS (ref)
10997 ? access_private_node : access_public_node);
10999 /* First, make sure that any templates in base-classes are
11000 instantiated. This ensures that if we call ourselves recursively
11001 we do not get confused about which classes are marked and which
11003 basep = &base_list;
11006 tree basetype = TREE_VALUE (*basep);
11008 if (!(processing_template_decl && uses_template_parms (basetype))
11009 && !complete_type_or_else (basetype, NULL))
11010 /* An incomplete type. Remove it from the list. */
11011 *basep = TREE_CHAIN (*basep);
11015 if (TREE_TYPE (*basep))
11017 if (CLASS_TYPE_P (basetype))
11018 max_vbases += VEC_length (tree, CLASSTYPE_VBASECLASSES (basetype));
11019 basep = &TREE_CHAIN (*basep);
11023 TYPE_MARKED_P (ref) = 1;
11025 /* The binfo slot should be empty, unless this is an (ill-formed)
11027 if (TYPE_BINFO (ref) && !TYPE_SIZE (ref))
11029 error ("redefinition of %q#T", ref);
11033 gcc_assert (TYPE_MAIN_VARIANT (ref) == ref);
11035 binfo = make_tree_binfo (max_bases);
11037 TYPE_BINFO (ref) = binfo;
11038 BINFO_OFFSET (binfo) = size_zero_node;
11039 BINFO_TYPE (binfo) = ref;
11041 /* Apply base-class info set up to the variants of this type. */
11042 fixup_type_variants (ref);
11046 BINFO_BASE_ACCESSES (binfo) = VEC_alloc (tree, gc, max_bases);
11047 /* An aggregate cannot have baseclasses. */
11048 CLASSTYPE_NON_AGGREGATE (ref) = 1;
11050 if (TREE_CODE (ref) == UNION_TYPE)
11052 error ("derived union %qT invalid", ref);
11059 if (TYPE_FOR_JAVA (ref))
11061 error ("Java class %qT cannot have multiple bases", ref);
11068 CLASSTYPE_VBASECLASSES (ref) = VEC_alloc (tree, gc, max_vbases);
11070 if (TYPE_FOR_JAVA (ref))
11072 error ("Java class %qT cannot have virtual bases", ref);
11077 for (igo_prev = binfo; base_list; base_list = TREE_CHAIN (base_list))
11079 tree access = TREE_PURPOSE (base_list);
11080 int via_virtual = TREE_TYPE (base_list) != NULL_TREE;
11081 tree basetype = TREE_VALUE (base_list);
11083 if (access == access_default_node)
11084 access = default_access;
11086 if (PACK_EXPANSION_P (basetype))
11087 basetype = PACK_EXPANSION_PATTERN (basetype);
11088 if (TREE_CODE (basetype) == TYPE_DECL)
11089 basetype = TREE_TYPE (basetype);
11090 if (!MAYBE_CLASS_TYPE_P (basetype) || TREE_CODE (basetype) == UNION_TYPE)
11092 error ("base type %qT fails to be a struct or class type",
11097 if (TYPE_FOR_JAVA (basetype) && (current_lang_depth () == 0))
11098 TYPE_FOR_JAVA (ref) = 1;
11100 base_binfo = NULL_TREE;
11101 if (CLASS_TYPE_P (basetype) && !dependent_type_p (basetype))
11103 base_binfo = TYPE_BINFO (basetype);
11104 /* The original basetype could have been a typedef'd type. */
11105 basetype = BINFO_TYPE (base_binfo);
11107 /* Inherit flags from the base. */
11108 TYPE_HAS_NEW_OPERATOR (ref)
11109 |= TYPE_HAS_NEW_OPERATOR (basetype);
11110 TYPE_HAS_ARRAY_NEW_OPERATOR (ref)
11111 |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype);
11112 TYPE_GETS_DELETE (ref) |= TYPE_GETS_DELETE (basetype);
11113 TYPE_HAS_CONVERSION (ref) |= TYPE_HAS_CONVERSION (basetype);
11114 CLASSTYPE_DIAMOND_SHAPED_P (ref)
11115 |= CLASSTYPE_DIAMOND_SHAPED_P (basetype);
11116 CLASSTYPE_REPEATED_BASE_P (ref)
11117 |= CLASSTYPE_REPEATED_BASE_P (basetype);
11120 /* We must do this test after we've seen through a typedef
11122 if (TYPE_MARKED_P (basetype))
11124 if (basetype == ref)
11125 error ("recursive type %qT undefined", basetype);
11127 error ("duplicate base type %qT invalid", basetype);
11131 if (PACK_EXPANSION_P (TREE_VALUE (base_list)))
11132 /* Regenerate the pack expansion for the bases. */
11133 basetype = make_pack_expansion (basetype);
11135 TYPE_MARKED_P (basetype) = 1;
11137 base_binfo = copy_binfo (base_binfo, basetype, ref,
11138 &igo_prev, via_virtual);
11139 if (!BINFO_INHERITANCE_CHAIN (base_binfo))
11140 BINFO_INHERITANCE_CHAIN (base_binfo) = binfo;
11142 BINFO_BASE_APPEND (binfo, base_binfo);
11143 BINFO_BASE_ACCESS_APPEND (binfo, access);
11146 if (VEC_space (tree, CLASSTYPE_VBASECLASSES (ref), 1))
11147 /* If we have space in the vbase vector, we must have shared at
11148 least one of them, and are therefore diamond shaped. */
11149 CLASSTYPE_DIAMOND_SHAPED_P (ref) = 1;
11151 /* Unmark all the types. */
11152 for (i = 0; BINFO_BASE_ITERATE (binfo, i, base_binfo); i++)
11153 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
11154 TYPE_MARKED_P (ref) = 0;
11156 /* Now see if we have a repeated base type. */
11157 if (!CLASSTYPE_REPEATED_BASE_P (ref))
11159 for (base_binfo = binfo; base_binfo;
11160 base_binfo = TREE_CHAIN (base_binfo))
11162 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
11164 CLASSTYPE_REPEATED_BASE_P (ref) = 1;
11167 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 1;
11169 for (base_binfo = binfo; base_binfo;
11170 base_binfo = TREE_CHAIN (base_binfo))
11171 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
11172 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
11181 /* Begin compiling the definition of an enumeration type.
11184 UNDERLYING_TYPE is the type that will be used as the storage for
11185 the enumeration type. This should be NULL_TREE if no storage type
11188 SCOPED_ENUM_P is true if this is a scoped enumeration type.
11190 Returns the type object, as yet incomplete.
11191 Also records info about it so that build_enumerator
11192 may be used to declare the individual values as they are read. */
11195 start_enum (tree name, tree underlying_type, bool scoped_enum_p)
11199 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
11201 /* If this is the real definition for a previous forward reference,
11202 fill in the contents in the same object that used to be the
11203 forward reference. */
11205 enumtype = lookup_and_check_tag (enum_type, name,
11206 /*tag_scope=*/ts_current,
11207 /*template_header_p=*/false);
11209 if (enumtype != NULL_TREE && TREE_CODE (enumtype) == ENUMERAL_TYPE)
11211 error_at (input_location, "multiple definition of %q#T", enumtype);
11212 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype)),
11213 "previous definition here");
11214 /* Clear out TYPE_VALUES, and start again. */
11215 TYPE_VALUES (enumtype) = NULL_TREE;
11219 /* In case of error, make a dummy enum to allow parsing to
11221 if (enumtype == error_mark_node)
11222 name = make_anon_name ();
11224 enumtype = cxx_make_type (ENUMERAL_TYPE);
11225 enumtype = pushtag (name, enumtype, /*tag_scope=*/ts_current);
11228 if (enumtype == error_mark_node)
11233 SET_SCOPED_ENUM_P (enumtype, 1);
11234 begin_scope (sk_scoped_enum, enumtype);
11236 /* [C++0x dcl.enum]p5:
11238 If not explicitly specified, the underlying type of a scoped
11239 enumeration type is int. */
11240 if (!underlying_type)
11241 underlying_type = integer_type_node;
11244 if (underlying_type)
11246 if (CP_INTEGRAL_TYPE_P (underlying_type))
11248 TYPE_MIN_VALUE (enumtype) = TYPE_MIN_VALUE (underlying_type);
11249 TYPE_MAX_VALUE (enumtype) = TYPE_MAX_VALUE (underlying_type);
11250 TYPE_SIZE (enumtype) = TYPE_SIZE (underlying_type);
11251 TYPE_SIZE_UNIT (enumtype) = TYPE_SIZE_UNIT (underlying_type);
11252 SET_TYPE_MODE (enumtype, TYPE_MODE (underlying_type));
11253 TYPE_PRECISION (enumtype) = TYPE_PRECISION (underlying_type);
11254 TYPE_ALIGN (enumtype) = TYPE_ALIGN (underlying_type);
11255 TYPE_USER_ALIGN (enumtype) = TYPE_USER_ALIGN (underlying_type);
11256 TYPE_UNSIGNED (enumtype) = TYPE_UNSIGNED (underlying_type);
11257 ENUM_UNDERLYING_TYPE (enumtype) = underlying_type;
11259 else if (!dependent_type_p (underlying_type))
11260 error ("underlying type %<%T%> of %<%T%> must be an integral type",
11261 underlying_type, enumtype);
11267 /* After processing and defining all the values of an enumeration type,
11268 install their decls in the enumeration type and finish it off.
11269 ENUMTYPE is the type object and VALUES a list of name-value pairs. */
11272 finish_enum (tree enumtype)
11280 tree underlying_type = NULL_TREE;
11281 bool fixed_underlying_type_p
11282 = ENUM_UNDERLYING_TYPE (enumtype) != NULL_TREE;
11284 /* We built up the VALUES in reverse order. */
11285 TYPE_VALUES (enumtype) = nreverse (TYPE_VALUES (enumtype));
11287 /* For an enum defined in a template, just set the type of the values;
11288 all further processing is postponed until the template is
11289 instantiated. We need to set the type so that tsubst of a CONST_DECL
11291 if (processing_template_decl)
11293 for (values = TYPE_VALUES (enumtype);
11295 values = TREE_CHAIN (values))
11296 TREE_TYPE (TREE_VALUE (values)) = enumtype;
11297 if (at_function_scope_p ())
11298 add_stmt (build_min (TAG_DEFN, enumtype));
11299 if (SCOPED_ENUM_P (enumtype))
11304 /* Determine the minimum and maximum values of the enumerators. */
11305 if (TYPE_VALUES (enumtype))
11307 minnode = maxnode = NULL_TREE;
11309 for (values = TYPE_VALUES (enumtype);
11311 values = TREE_CHAIN (values))
11313 decl = TREE_VALUE (values);
11315 /* [dcl.enum]: Following the closing brace of an enum-specifier,
11316 each enumerator has the type of its enumeration. Prior to the
11317 closing brace, the type of each enumerator is the type of its
11318 initializing value. */
11319 TREE_TYPE (decl) = enumtype;
11321 /* Update the minimum and maximum values, if appropriate. */
11322 value = DECL_INITIAL (decl);
11323 if (value == error_mark_node)
11324 value = integer_zero_node;
11325 /* Figure out what the minimum and maximum values of the
11326 enumerators are. */
11328 minnode = maxnode = value;
11329 else if (tree_int_cst_lt (maxnode, value))
11331 else if (tree_int_cst_lt (value, minnode))
11338 If the enumerator-list is empty, the underlying type is as if
11339 the enumeration had a single enumerator with value 0. */
11340 minnode = maxnode = integer_zero_node;
11342 if (!fixed_underlying_type_p)
11344 /* Compute the number of bits require to represent all values of the
11345 enumeration. We must do this before the type of MINNODE and
11346 MAXNODE are transformed, since tree_int_cst_min_precision relies
11347 on the TREE_TYPE of the value it is passed. */
11348 bool unsignedp = tree_int_cst_sgn (minnode) >= 0;
11349 int lowprec = tree_int_cst_min_precision (minnode, unsignedp);
11350 int highprec = tree_int_cst_min_precision (maxnode, unsignedp);
11351 int precision = MAX (lowprec, highprec);
11353 bool use_short_enum;
11355 /* Determine the underlying type of the enumeration.
11359 The underlying type of an enumeration is an integral type that
11360 can represent all the enumerator values defined in the
11361 enumeration. It is implementation-defined which integral type is
11362 used as the underlying type for an enumeration except that the
11363 underlying type shall not be larger than int unless the value of
11364 an enumerator cannot fit in an int or unsigned int.
11366 We use "int" or an "unsigned int" as the underlying type, even if
11367 a smaller integral type would work, unless the user has
11368 explicitly requested that we use the smallest possible type. The
11369 user can request that for all enumerations with a command line
11370 flag, or for just one enumeration with an attribute. */
11372 use_short_enum = flag_short_enums
11373 || lookup_attribute ("packed", TYPE_ATTRIBUTES (enumtype));
11375 for (itk = (use_short_enum ? itk_char : itk_int);
11379 underlying_type = integer_types[itk];
11380 if (TYPE_PRECISION (underlying_type) >= precision
11381 && TYPE_UNSIGNED (underlying_type) == unsignedp)
11384 if (itk == itk_none)
11388 IF no integral type can represent all the enumerator values, the
11389 enumeration is ill-formed. */
11390 error ("no integral type can represent all of the enumerator values "
11391 "for %qT", enumtype);
11392 precision = TYPE_PRECISION (long_long_integer_type_node);
11393 underlying_type = integer_types[itk_unsigned_long_long];
11398 The value of sizeof() applied to an enumeration type, an object
11399 of an enumeration type, or an enumerator, is the value of sizeof()
11400 applied to the underlying type. */
11401 TYPE_MIN_VALUE (enumtype) = TYPE_MIN_VALUE (underlying_type);
11402 TYPE_MAX_VALUE (enumtype) = TYPE_MAX_VALUE (underlying_type);
11403 TYPE_SIZE (enumtype) = TYPE_SIZE (underlying_type);
11404 TYPE_SIZE_UNIT (enumtype) = TYPE_SIZE_UNIT (underlying_type);
11405 SET_TYPE_MODE (enumtype, TYPE_MODE (underlying_type));
11406 TYPE_PRECISION (enumtype) = TYPE_PRECISION (underlying_type);
11407 TYPE_ALIGN (enumtype) = TYPE_ALIGN (underlying_type);
11408 TYPE_USER_ALIGN (enumtype) = TYPE_USER_ALIGN (underlying_type);
11409 TYPE_UNSIGNED (enumtype) = TYPE_UNSIGNED (underlying_type);
11411 /* Compute the minimum and maximum values for the type.
11415 For an enumeration where emin is the smallest enumerator and emax
11416 is the largest, the values of the enumeration are the values of the
11417 underlying type in the range bmin to bmax, where bmin and bmax are,
11418 respectively, the smallest and largest values of the smallest bit-
11419 field that can store emin and emax. */
11421 /* The middle-end currently assumes that types with TYPE_PRECISION
11422 narrower than their underlying type are suitably zero or sign
11423 extended to fill their mode. Similarly, it assumes that the front
11424 end assures that a value of a particular type must be within
11425 TYPE_MIN_VALUE and TYPE_MAX_VALUE.
11427 We used to set these fields based on bmin and bmax, but that led
11428 to invalid assumptions like optimizing away bounds checking. So
11429 now we just set the TYPE_PRECISION, TYPE_MIN_VALUE, and
11430 TYPE_MAX_VALUE to the values for the mode above and only restrict
11431 the ENUM_UNDERLYING_TYPE for the benefit of diagnostics. */
11432 ENUM_UNDERLYING_TYPE (enumtype)
11433 = build_distinct_type_copy (underlying_type);
11434 TYPE_PRECISION (ENUM_UNDERLYING_TYPE (enumtype)) = precision;
11435 set_min_and_max_values_for_integral_type
11436 (ENUM_UNDERLYING_TYPE (enumtype), precision, unsignedp);
11438 /* If -fstrict-enums, still constrain TYPE_MIN/MAX_VALUE. */
11439 if (flag_strict_enums)
11440 set_min_and_max_values_for_integral_type (enumtype, precision,
11444 underlying_type = ENUM_UNDERLYING_TYPE (enumtype);
11446 /* Convert each of the enumerators to the type of the underlying
11447 type of the enumeration. */
11448 for (values = TYPE_VALUES (enumtype); values; values = TREE_CHAIN (values))
11450 location_t saved_location;
11452 decl = TREE_VALUE (values);
11453 saved_location = input_location;
11454 input_location = DECL_SOURCE_LOCATION (decl);
11455 if (fixed_underlying_type_p)
11456 /* If the enumeration type has a fixed underlying type, we
11457 already checked all of the enumerator values. */
11458 value = DECL_INITIAL (decl);
11460 value = perform_implicit_conversion (underlying_type,
11461 DECL_INITIAL (decl),
11462 tf_warning_or_error);
11463 input_location = saved_location;
11465 /* Do not clobber shared ints. */
11466 value = copy_node (value);
11468 TREE_TYPE (value) = enumtype;
11469 DECL_INITIAL (decl) = value;
11472 /* Fix up all variant types of this enum type. */
11473 for (t = TYPE_MAIN_VARIANT (enumtype); t; t = TYPE_NEXT_VARIANT (t))
11475 TYPE_VALUES (t) = TYPE_VALUES (enumtype);
11476 TYPE_MIN_VALUE (t) = TYPE_MIN_VALUE (enumtype);
11477 TYPE_MAX_VALUE (t) = TYPE_MAX_VALUE (enumtype);
11478 TYPE_SIZE (t) = TYPE_SIZE (enumtype);
11479 TYPE_SIZE_UNIT (t) = TYPE_SIZE_UNIT (enumtype);
11480 SET_TYPE_MODE (t, TYPE_MODE (enumtype));
11481 TYPE_PRECISION (t) = TYPE_PRECISION (enumtype);
11482 TYPE_ALIGN (t) = TYPE_ALIGN (enumtype);
11483 TYPE_USER_ALIGN (t) = TYPE_USER_ALIGN (enumtype);
11484 TYPE_UNSIGNED (t) = TYPE_UNSIGNED (enumtype);
11485 ENUM_UNDERLYING_TYPE (t) = ENUM_UNDERLYING_TYPE (enumtype);
11488 /* Finish up the scope of a scoped enumeration. */
11489 if (SCOPED_ENUM_P (enumtype))
11492 /* Finish debugging output for this type. */
11493 rest_of_type_compilation (enumtype, namespace_bindings_p ());
11496 /* Build and install a CONST_DECL for an enumeration constant of the
11497 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
11498 Assignment of sequential values by default is handled here. */
11501 build_enumerator (tree name, tree value, tree enumtype)
11507 /* If the VALUE was erroneous, pretend it wasn't there; that will
11508 result in the enum being assigned the next value in sequence. */
11509 if (value == error_mark_node)
11512 /* Remove no-op casts from the value. */
11514 STRIP_TYPE_NOPS (value);
11516 if (! processing_template_decl)
11518 /* Validate and default VALUE. */
11519 if (value != NULL_TREE)
11521 value = integral_constant_value (value);
11523 if (TREE_CODE (value) == INTEGER_CST)
11525 value = perform_integral_promotions (value);
11526 constant_expression_warning (value);
11530 error ("enumerator value for %qD is not an integer constant", name);
11535 /* Default based on previous value. */
11536 if (value == NULL_TREE)
11538 if (TYPE_VALUES (enumtype))
11541 unsigned HOST_WIDE_INT lo;
11545 /* The next value is the previous value plus one.
11546 add_double doesn't know the type of the target expression,
11547 so we must check with int_fits_type_p as well. */
11548 prev_value = DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype)));
11549 if (error_operand_p (prev_value))
11550 value = error_mark_node;
11553 overflowed = add_double (TREE_INT_CST_LOW (prev_value),
11554 TREE_INT_CST_HIGH (prev_value),
11556 value = build_int_cst_wide (TREE_TYPE (prev_value), lo, hi);
11558 |= !int_fits_type_p (value, TREE_TYPE (prev_value));
11562 error ("overflow in enumeration values at %qD", name);
11563 value = error_mark_node;
11568 value = integer_zero_node;
11571 /* Remove no-op casts from the value. */
11572 STRIP_TYPE_NOPS (value);
11574 /* If the underlying type of the enum is fixed, check whether
11575 the enumerator values fits in the underlying type. If it
11576 does not fit, the program is ill-formed [C++0x dcl.enum]. */
11577 if (ENUM_UNDERLYING_TYPE (enumtype)
11579 && TREE_CODE (value) == INTEGER_CST
11580 && !int_fits_type_p (value, ENUM_UNDERLYING_TYPE (enumtype)))
11582 error ("enumerator value %E is too large for underlying type %<%T%>",
11583 value, ENUM_UNDERLYING_TYPE (enumtype));
11585 /* Silently convert the value so that we can continue. */
11586 value = perform_implicit_conversion (ENUM_UNDERLYING_TYPE (enumtype),
11591 /* C++ associates enums with global, function, or class declarations. */
11592 context = current_scope ();
11594 /* Build the actual enumeration constant. Note that the enumeration
11595 constants have the underlying type of the enum (if it is fixed)
11596 or the type of their initializer (if the underlying type of the
11597 enum is not fixed):
11601 If the underlying type is fixed, the type of each enumerator
11602 prior to the closing brace is the underlying type; if the
11603 initializing value of an enumerator cannot be represented by
11604 the underlying type, the program is ill-formed. If the
11605 underlying type is not fixed, the type of each enumerator is
11606 the type of its initializing value.
11608 If the underlying type is not fixed, it will be computed by
11609 finish_enum and we will reset the type of this enumerator. Of
11610 course, if we're processing a template, there may be no value. */
11611 type = value ? TREE_TYPE (value) : NULL_TREE;
11613 if (context && context == current_class_type)
11614 /* This enum declaration is local to the class. We need the full
11615 lang_decl so that we can record DECL_CLASS_CONTEXT, for example. */
11616 decl = build_lang_decl (CONST_DECL, name, type);
11618 /* It's a global enum, or it's local to a function. (Note local to
11619 a function could mean local to a class method. */
11620 decl = build_decl (input_location, CONST_DECL, name, type);
11622 DECL_CONTEXT (decl) = FROB_CONTEXT (context);
11623 TREE_CONSTANT (decl) = 1;
11624 TREE_READONLY (decl) = 1;
11625 DECL_INITIAL (decl) = value;
11627 if (context && context == current_class_type && !SCOPED_ENUM_P (enumtype))
11628 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
11629 on the TYPE_FIELDS list for `S'. (That's so that you can say
11630 things like `S::i' later.) */
11631 finish_member_declaration (decl);
11635 /* Add this enumeration constant to the list for this type. */
11636 TYPE_VALUES (enumtype) = tree_cons (name, decl, TYPE_VALUES (enumtype));
11639 /* Look for an enumerator with the given NAME within the enumeration
11640 type ENUMTYPE. This routine is used primarily for qualified name
11641 lookup into an enumerator in C++0x, e.g.,
11643 enum class Color { Red, Green, Blue };
11645 Color color = Color::Red;
11647 Returns the value corresponding to the enumerator, or
11648 NULL_TREE if no such enumerator was found. */
11650 lookup_enumerator (tree enumtype, tree name)
11653 gcc_assert (enumtype && TREE_CODE (enumtype) == ENUMERAL_TYPE);
11655 e = purpose_member (name, TYPE_VALUES (enumtype));
11656 return e? TREE_VALUE (e) : NULL_TREE;
11660 /* We're defining DECL. Make sure that its type is OK. */
11663 check_function_type (tree decl, tree current_function_parms)
11665 tree fntype = TREE_TYPE (decl);
11666 tree return_type = complete_type (TREE_TYPE (fntype));
11668 /* In a function definition, arg types must be complete. */
11669 require_complete_types_for_parms (current_function_parms);
11671 /* constexpr functions must have literal argument types and
11672 literal return type. */
11673 validate_constexpr_fundecl (decl);
11675 if (dependent_type_p (return_type))
11677 if (!COMPLETE_OR_VOID_TYPE_P (return_type)
11678 || (TYPE_FOR_JAVA (return_type) && MAYBE_CLASS_TYPE_P (return_type)))
11680 tree args = TYPE_ARG_TYPES (fntype);
11682 if (!COMPLETE_OR_VOID_TYPE_P (return_type))
11683 error ("return type %q#T is incomplete", return_type);
11685 error ("return type has Java class type %q#T", return_type);
11687 /* Make it return void instead. */
11688 if (TREE_CODE (fntype) == METHOD_TYPE)
11689 fntype = build_method_type_directly (TREE_TYPE (TREE_VALUE (args)),
11691 TREE_CHAIN (args));
11693 fntype = build_function_type (void_type_node, args);
11695 = build_exception_variant (fntype,
11696 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (decl)));
11697 fntype = (cp_build_type_attribute_variant
11698 (fntype, TYPE_ATTRIBUTES (TREE_TYPE (decl))));
11699 TREE_TYPE (decl) = fntype;
11702 abstract_virtuals_error (decl, TREE_TYPE (fntype));
11705 /* Create the FUNCTION_DECL for a function definition.
11706 DECLSPECS and DECLARATOR are the parts of the declaration;
11707 they describe the function's name and the type it returns,
11708 but twisted together in a fashion that parallels the syntax of C.
11710 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
11711 DECLARATOR is really the DECL for the function we are about to
11712 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
11713 indicating that the function is an inline defined in-class.
11715 This function creates a binding context for the function body
11716 as well as setting up the FUNCTION_DECL in current_function_decl.
11718 For C++, we must first check whether that datum makes any sense.
11719 For example, "class A local_a(1,2);" means that variable local_a
11720 is an aggregate of type A, which should have a constructor
11721 applied to it with the argument list [1, 2].
11723 On entry, DECL_INITIAL (decl1) should be NULL_TREE or error_mark_node,
11724 or may be a BLOCK if the function has been defined previously
11725 in this translation unit. On exit, DECL_INITIAL (decl1) will be
11726 error_mark_node if the function has never been defined, or
11727 a BLOCK if the function has been defined somewhere. */
11730 start_preparsed_function (tree decl1, tree attrs, int flags)
11732 tree ctype = NULL_TREE;
11735 int doing_friend = 0;
11736 struct cp_binding_level *bl;
11737 tree current_function_parms;
11738 struct c_fileinfo *finfo
11739 = get_fileinfo (LOCATION_FILE (DECL_SOURCE_LOCATION (decl1)));
11740 bool honor_interface;
11742 /* Sanity check. */
11743 gcc_assert (TREE_CODE (TREE_VALUE (void_list_node)) == VOID_TYPE);
11744 gcc_assert (TREE_CHAIN (void_list_node) == NULL_TREE);
11746 fntype = TREE_TYPE (decl1);
11747 if (TREE_CODE (fntype) == METHOD_TYPE)
11748 ctype = TYPE_METHOD_BASETYPE (fntype);
11750 /* ISO C++ 11.4/5. A friend function defined in a class is in
11751 the (lexical) scope of the class in which it is defined. */
11752 if (!ctype && DECL_FRIEND_P (decl1))
11754 ctype = DECL_FRIEND_CONTEXT (decl1);
11756 /* CTYPE could be null here if we're dealing with a template;
11757 for example, `inline friend float foo()' inside a template
11758 will have no CTYPE set. */
11759 if (ctype && TREE_CODE (ctype) != RECORD_TYPE)
11765 if (DECL_DECLARED_INLINE_P (decl1)
11766 && lookup_attribute ("noinline", attrs))
11767 warning (0, "inline function %q+D given attribute noinline", decl1);
11769 /* Handle gnu_inline attribute. */
11770 if (GNU_INLINE_P (decl1))
11772 DECL_EXTERNAL (decl1) = 1;
11773 DECL_NOT_REALLY_EXTERN (decl1) = 0;
11774 DECL_INTERFACE_KNOWN (decl1) = 1;
11775 DECL_DISREGARD_INLINE_LIMITS (decl1) = 1;
11778 if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1))
11779 /* This is a constructor, we must ensure that any default args
11780 introduced by this definition are propagated to the clones
11781 now. The clones are used directly in overload resolution. */
11782 adjust_clone_args (decl1);
11784 /* Sometimes we don't notice that a function is a static member, and
11785 build a METHOD_TYPE for it. Fix that up now. */
11786 if (ctype != NULL_TREE && DECL_STATIC_FUNCTION_P (decl1)
11787 && TREE_CODE (TREE_TYPE (decl1)) == METHOD_TYPE)
11789 revert_static_member_fn (decl1);
11793 /* Set up current_class_type, and enter the scope of the class, if
11796 push_nested_class (ctype);
11797 else if (DECL_STATIC_FUNCTION_P (decl1))
11798 push_nested_class (DECL_CONTEXT (decl1));
11800 /* Now that we have entered the scope of the class, we must restore
11801 the bindings for any template parameters surrounding DECL1, if it
11802 is an inline member template. (Order is important; consider the
11803 case where a template parameter has the same name as a field of
11804 the class.) It is not until after this point that
11805 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
11806 if (flags & SF_INCLASS_INLINE)
11807 maybe_begin_member_template_processing (decl1);
11809 /* Effective C++ rule 15. */
11811 && DECL_OVERLOADED_OPERATOR_P (decl1) == NOP_EXPR
11812 && TREE_CODE (TREE_TYPE (fntype)) == VOID_TYPE)
11813 warning (OPT_Weffc__, "%<operator=%> should return a reference to %<*this%>");
11815 /* Make the init_value nonzero so pushdecl knows this is not tentative.
11816 error_mark_node is replaced below (in poplevel) with the BLOCK. */
11817 if (!DECL_INITIAL (decl1))
11818 DECL_INITIAL (decl1) = error_mark_node;
11820 /* This function exists in static storage.
11821 (This does not mean `static' in the C sense!) */
11822 TREE_STATIC (decl1) = 1;
11824 /* We must call push_template_decl after current_class_type is set
11825 up. (If we are processing inline definitions after exiting a
11826 class scope, current_class_type will be NULL_TREE until set above
11827 by push_nested_class.) */
11828 if (processing_template_decl)
11830 /* FIXME: Handle error_mark_node more gracefully. */
11831 tree newdecl1 = push_template_decl (decl1);
11832 if (newdecl1 != error_mark_node)
11836 /* We are now in the scope of the function being defined. */
11837 current_function_decl = decl1;
11839 /* Save the parm names or decls from this function's declarator
11840 where store_parm_decls will find them. */
11841 current_function_parms = DECL_ARGUMENTS (decl1);
11843 /* Make sure the parameter and return types are reasonable. When
11844 you declare a function, these types can be incomplete, but they
11845 must be complete when you define the function. */
11846 check_function_type (decl1, current_function_parms);
11848 /* Build the return declaration for the function. */
11849 restype = TREE_TYPE (fntype);
11850 if (DECL_RESULT (decl1) == NULL_TREE)
11854 resdecl = build_decl (input_location, RESULT_DECL, 0, restype);
11855 DECL_ARTIFICIAL (resdecl) = 1;
11856 DECL_IGNORED_P (resdecl) = 1;
11857 DECL_RESULT (decl1) = resdecl;
11859 cp_apply_type_quals_to_decl (cp_type_quals (restype), resdecl);
11862 /* Let the user know we're compiling this function. */
11863 announce_function (decl1);
11865 /* Record the decl so that the function name is defined.
11866 If we already have a decl for this name, and it is a FUNCTION_DECL,
11867 use the old decl. */
11868 if (!processing_template_decl && !(flags & SF_PRE_PARSED))
11870 /* A specialization is not used to guide overload resolution. */
11871 if (!DECL_FUNCTION_MEMBER_P (decl1)
11872 && !(DECL_USE_TEMPLATE (decl1) &&
11873 PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl1))))
11875 tree olddecl = pushdecl (decl1);
11877 if (olddecl == error_mark_node)
11878 /* If something went wrong when registering the declaration,
11879 use DECL1; we have to have a FUNCTION_DECL to use when
11880 parsing the body of the function. */
11884 /* Otherwise, OLDDECL is either a previous declaration
11885 of the same function or DECL1 itself. */
11887 if (warn_missing_declarations
11888 && olddecl == decl1
11889 && !DECL_MAIN_P (decl1)
11890 && TREE_PUBLIC (decl1)
11891 && !DECL_DECLARED_INLINE_P (decl1))
11895 /* Check whether DECL1 is in an anonymous
11897 for (context = DECL_CONTEXT (decl1);
11899 context = DECL_CONTEXT (context))
11901 if (TREE_CODE (context) == NAMESPACE_DECL
11902 && DECL_NAME (context) == NULL_TREE)
11906 if (context == NULL)
11907 warning (OPT_Wmissing_declarations,
11908 "no previous declaration for %q+D", decl1);
11916 /* We need to set the DECL_CONTEXT. */
11917 if (!DECL_CONTEXT (decl1) && DECL_TEMPLATE_INFO (decl1))
11918 DECL_CONTEXT (decl1) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1));
11920 fntype = TREE_TYPE (decl1);
11922 /* If #pragma weak applies, mark the decl appropriately now.
11923 The pragma only applies to global functions. Because
11924 determining whether or not the #pragma applies involves
11925 computing the mangled name for the declaration, we cannot
11926 apply the pragma until after we have merged this declaration
11927 with any previous declarations; if the original declaration
11928 has a linkage specification, that specification applies to
11929 the definition as well, and may affect the mangled name. */
11930 if (!DECL_CONTEXT (decl1))
11931 maybe_apply_pragma_weak (decl1);
11934 /* Reset this in case the call to pushdecl changed it. */
11935 current_function_decl = decl1;
11937 gcc_assert (DECL_INITIAL (decl1));
11939 /* This function may already have been parsed, in which case just
11940 return; our caller will skip over the body without parsing. */
11941 if (DECL_INITIAL (decl1) != error_mark_node)
11944 /* Initialize RTL machinery. We cannot do this until
11945 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
11946 even when processing a template; this is how we get
11947 CFUN set up, and our per-function variables initialized.
11948 FIXME factor out the non-RTL stuff. */
11949 bl = current_binding_level;
11950 allocate_struct_function (decl1, processing_template_decl);
11952 /* Initialize the language data structures. Whenever we start
11953 a new function, we destroy temporaries in the usual way. */
11954 cfun->language = GGC_CNEW (struct language_function);
11955 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
11956 current_binding_level = bl;
11958 /* Even though we're inside a function body, we still don't want to
11959 call expand_expr to calculate the size of a variable-sized array.
11960 We haven't necessarily assigned RTL to all variables yet, so it's
11961 not safe to try to expand expressions involving them. */
11962 cfun->dont_save_pending_sizes_p = 1;
11964 /* Start the statement-tree, start the tree now. */
11965 DECL_SAVED_TREE (decl1) = push_stmt_list ();
11967 /* If we are (erroneously) defining a function that we have already
11968 defined before, wipe out what we knew before. */
11969 if (!DECL_PENDING_INLINE_P (decl1))
11970 DECL_SAVED_FUNCTION_DATA (decl1) = NULL;
11972 if (ctype && !doing_friend && !DECL_STATIC_FUNCTION_P (decl1))
11974 /* We know that this was set up by `grokclassfn'. We do not
11975 wait until `store_parm_decls', since evil parse errors may
11976 never get us to that point. Here we keep the consistency
11977 between `current_class_type' and `current_class_ptr'. */
11978 tree t = DECL_ARGUMENTS (decl1);
11980 gcc_assert (t != NULL_TREE && TREE_CODE (t) == PARM_DECL);
11981 gcc_assert (TREE_CODE (TREE_TYPE (t)) == POINTER_TYPE);
11983 cp_function_chain->x_current_class_ref
11984 = cp_build_indirect_ref (t, RO_NULL, tf_warning_or_error);
11985 cp_function_chain->x_current_class_ptr = t;
11987 /* Constructors and destructors need to know whether they're "in
11988 charge" of initializing virtual base classes. */
11989 t = TREE_CHAIN (t);
11990 if (DECL_HAS_IN_CHARGE_PARM_P (decl1))
11992 current_in_charge_parm = t;
11993 t = TREE_CHAIN (t);
11995 if (DECL_HAS_VTT_PARM_P (decl1))
11997 gcc_assert (DECL_NAME (t) == vtt_parm_identifier);
11998 current_vtt_parm = t;
12002 honor_interface = (!DECL_TEMPLATE_INSTANTIATION (decl1)
12003 /* Implicitly-defined methods (like the
12004 destructor for a class in which no destructor
12005 is explicitly declared) must not be defined
12006 until their definition is needed. So, we
12007 ignore interface specifications for
12008 compiler-generated functions. */
12009 && !DECL_ARTIFICIAL (decl1));
12011 if (DECL_INTERFACE_KNOWN (decl1))
12013 tree ctx = decl_function_context (decl1);
12015 if (DECL_NOT_REALLY_EXTERN (decl1))
12016 DECL_EXTERNAL (decl1) = 0;
12018 if (ctx != NULL_TREE && DECL_DECLARED_INLINE_P (ctx)
12019 && TREE_PUBLIC (ctx))
12020 /* This is a function in a local class in an extern inline
12022 comdat_linkage (decl1);
12024 /* If this function belongs to an interface, it is public.
12025 If it belongs to someone else's interface, it is also external.
12026 This only affects inlines and template instantiations. */
12027 else if (!finfo->interface_unknown && honor_interface)
12029 if (DECL_DECLARED_INLINE_P (decl1)
12030 || DECL_TEMPLATE_INSTANTIATION (decl1)
12031 || processing_template_decl)
12033 DECL_EXTERNAL (decl1)
12034 = (finfo->interface_only
12035 || (DECL_DECLARED_INLINE_P (decl1)
12036 && ! flag_implement_inlines
12037 && !DECL_VINDEX (decl1)));
12039 /* For WIN32 we also want to put these in linkonce sections. */
12040 maybe_make_one_only (decl1);
12043 DECL_EXTERNAL (decl1) = 0;
12044 DECL_INTERFACE_KNOWN (decl1) = 1;
12045 /* If this function is in an interface implemented in this file,
12046 make sure that the back end knows to emit this function
12048 if (!DECL_EXTERNAL (decl1))
12049 mark_needed (decl1);
12051 else if (finfo->interface_unknown && finfo->interface_only
12052 && honor_interface)
12054 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
12055 interface, we will have both finfo->interface_unknown and
12056 finfo->interface_only set. In that case, we don't want to
12057 use the normal heuristics because someone will supply a
12058 #pragma implementation elsewhere, and deducing it here would
12059 produce a conflict. */
12060 comdat_linkage (decl1);
12061 DECL_EXTERNAL (decl1) = 0;
12062 DECL_INTERFACE_KNOWN (decl1) = 1;
12063 DECL_DEFER_OUTPUT (decl1) = 1;
12067 /* This is a definition, not a reference.
12068 So clear DECL_EXTERNAL, unless this is a GNU extern inline. */
12069 if (!GNU_INLINE_P (decl1))
12070 DECL_EXTERNAL (decl1) = 0;
12072 if ((DECL_DECLARED_INLINE_P (decl1)
12073 || DECL_TEMPLATE_INSTANTIATION (decl1))
12074 && ! DECL_INTERFACE_KNOWN (decl1))
12075 DECL_DEFER_OUTPUT (decl1) = 1;
12077 DECL_INTERFACE_KNOWN (decl1) = 1;
12080 /* Determine the ELF visibility attribute for the function. We must not
12081 do this before calling "pushdecl", as we must allow "duplicate_decls"
12082 to merge any attributes appropriately. We also need to wait until
12084 if (!DECL_CLONED_FUNCTION_P (decl1))
12085 determine_visibility (decl1);
12087 begin_scope (sk_function_parms, decl1);
12091 if (DECL_DESTRUCTOR_P (decl1)
12092 || (DECL_CONSTRUCTOR_P (decl1)
12093 && targetm.cxx.cdtor_returns_this ()))
12095 cdtor_label = build_decl (input_location,
12096 LABEL_DECL, NULL_TREE, NULL_TREE);
12097 DECL_CONTEXT (cdtor_label) = current_function_decl;
12100 start_fname_decls ();
12102 store_parm_decls (current_function_parms);
12106 /* Like start_preparsed_function, except that instead of a
12107 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
12109 Returns 1 on success. If the DECLARATOR is not suitable for a function
12110 (it defines a datum instead), we return 0, which tells
12111 yyparse to report a parse error. */
12114 start_function (cp_decl_specifier_seq *declspecs,
12115 const cp_declarator *declarator,
12120 decl1 = grokdeclarator (declarator, declspecs, FUNCDEF, 1, &attrs);
12121 if (decl1 == error_mark_node)
12123 /* If the declarator is not suitable for a function definition,
12124 cause a syntax error. */
12125 if (decl1 == NULL_TREE || TREE_CODE (decl1) != FUNCTION_DECL)
12127 error ("invalid function declaration");
12131 if (DECL_MAIN_P (decl1))
12132 /* main must return int. grokfndecl should have corrected it
12133 (and issued a diagnostic) if the user got it wrong. */
12134 gcc_assert (same_type_p (TREE_TYPE (TREE_TYPE (decl1)),
12135 integer_type_node));
12137 start_preparsed_function (decl1, attrs, /*flags=*/SF_DEFAULT);
12142 /* Returns true iff an EH_SPEC_BLOCK should be created in the body of
12146 use_eh_spec_block (tree fn)
12148 return (flag_exceptions && flag_enforce_eh_specs
12149 && !processing_template_decl
12150 && TYPE_RAISES_EXCEPTIONS (TREE_TYPE (fn))
12151 /* We insert the EH_SPEC_BLOCK only in the original
12152 function; then, it is copied automatically to the
12154 && !DECL_CLONED_FUNCTION_P (fn)
12155 /* Implicitly-generated constructors and destructors have
12156 exception specifications. However, those specifications
12157 are the union of the possible exceptions specified by the
12158 constructors/destructors for bases and members, so no
12159 unallowed exception will ever reach this function. By
12160 not creating the EH_SPEC_BLOCK we save a little memory,
12161 and we avoid spurious warnings about unreachable
12163 && !DECL_ARTIFICIAL (fn));
12166 /* Store the parameter declarations into the current function declaration.
12167 This is called after parsing the parameter declarations, before
12168 digesting the body of the function.
12170 Also install to binding contour return value identifier, if any. */
12173 store_parm_decls (tree current_function_parms)
12175 tree fndecl = current_function_decl;
12178 /* This is a chain of any other decls that came in among the parm
12179 declarations. If a parm is declared with enum {foo, bar} x;
12180 then CONST_DECLs for foo and bar are put here. */
12181 tree nonparms = NULL_TREE;
12183 if (current_function_parms)
12185 /* This case is when the function was defined with an ANSI prototype.
12186 The parms already have decls, so we need not do anything here
12187 except record them as in effect
12188 and complain if any redundant old-style parm decls were written. */
12190 tree specparms = current_function_parms;
12193 /* Must clear this because it might contain TYPE_DECLs declared
12195 current_binding_level->names = NULL;
12197 /* If we're doing semantic analysis, then we'll call pushdecl
12198 for each of these. We must do them in reverse order so that
12199 they end in the correct forward order. */
12200 specparms = nreverse (specparms);
12202 for (parm = specparms; parm; parm = next)
12204 next = TREE_CHAIN (parm);
12205 if (TREE_CODE (parm) == PARM_DECL)
12207 if (DECL_NAME (parm) == NULL_TREE
12208 || TREE_CODE (parm) != VOID_TYPE)
12211 error ("parameter %qD declared void", parm);
12215 /* If we find an enum constant or a type tag,
12216 put it aside for the moment. */
12217 TREE_CHAIN (parm) = NULL_TREE;
12218 nonparms = chainon (nonparms, parm);
12222 /* Get the decls in their original chain order and record in the
12223 function. This is all and only the PARM_DECLs that were
12224 pushed into scope by the loop above. */
12225 DECL_ARGUMENTS (fndecl) = getdecls ();
12228 DECL_ARGUMENTS (fndecl) = NULL_TREE;
12230 /* Now store the final chain of decls for the arguments
12231 as the decl-chain of the current lexical scope.
12232 Put the enumerators in as well, at the front so that
12233 DECL_ARGUMENTS is not modified. */
12234 current_binding_level->names = chainon (nonparms, DECL_ARGUMENTS (fndecl));
12236 if (use_eh_spec_block (current_function_decl))
12237 current_eh_spec_block = begin_eh_spec_block ();
12241 /* We have finished doing semantic analysis on DECL, but have not yet
12242 generated RTL for its body. Save away our current state, so that
12243 when we want to generate RTL later we know what to do. */
12246 save_function_data (tree decl)
12248 struct language_function *f;
12250 /* Save the language-specific per-function data so that we can
12251 get it back when we really expand this function. */
12252 gcc_assert (!DECL_PENDING_INLINE_P (decl));
12255 f = GGC_NEW (struct language_function);
12256 memcpy (f, cp_function_chain, sizeof (struct language_function));
12257 DECL_SAVED_FUNCTION_DATA (decl) = f;
12259 /* Clear out the bits we don't need. */
12260 f->base.x_stmt_tree.x_cur_stmt_list = NULL_TREE;
12261 f->bindings = NULL;
12262 f->x_local_names = NULL;
12266 /* Set the return value of the constructor (if present). */
12269 finish_constructor_body (void)
12274 if (targetm.cxx.cdtor_returns_this ()
12275 && (! TYPE_FOR_JAVA (current_class_type)))
12277 /* Any return from a constructor will end up here. */
12278 add_stmt (build_stmt (input_location, LABEL_EXPR, cdtor_label));
12280 val = DECL_ARGUMENTS (current_function_decl);
12281 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
12282 DECL_RESULT (current_function_decl), val);
12283 /* Return the address of the object. */
12284 exprstmt = build_stmt (input_location, RETURN_EXPR, val);
12285 add_stmt (exprstmt);
12289 /* Do all the processing for the beginning of a destructor; set up the
12290 vtable pointers and cleanups for bases and members. */
12293 begin_destructor_body (void)
12295 tree compound_stmt;
12297 /* If the CURRENT_CLASS_TYPE is incomplete, we will have already
12298 issued an error message. We still want to try to process the
12299 body of the function, but initialize_vtbl_ptrs will crash if
12300 TYPE_BINFO is NULL. */
12301 if (COMPLETE_TYPE_P (current_class_type))
12303 compound_stmt = begin_compound_stmt (0);
12304 /* Make all virtual function table pointers in non-virtual base
12305 classes point to CURRENT_CLASS_TYPE's virtual function
12307 initialize_vtbl_ptrs (current_class_ptr);
12308 finish_compound_stmt (compound_stmt);
12310 /* And insert cleanups for our bases and members so that they
12311 will be properly destroyed if we throw. */
12312 push_base_cleanups ();
12316 /* At the end of every destructor we generate code to delete the object if
12317 necessary. Do that now. */
12320 finish_destructor_body (void)
12324 /* Any return from a destructor will end up here; that way all base
12325 and member cleanups will be run when the function returns. */
12326 add_stmt (build_stmt (input_location, LABEL_EXPR, cdtor_label));
12328 /* In a virtual destructor, we must call delete. */
12329 if (DECL_VIRTUAL_P (current_function_decl))
12332 tree virtual_size = cxx_sizeof (current_class_type);
12336 At the point of definition of a virtual destructor (including
12337 an implicit definition), non-placement operator delete shall
12338 be looked up in the scope of the destructor's class and if
12339 found shall be accessible and unambiguous. */
12340 exprstmt = build_op_delete_call(DELETE_EXPR, current_class_ptr,
12342 /*global_p=*/false,
12343 /*placement=*/NULL_TREE,
12344 /*alloc_fn=*/NULL_TREE);
12346 if_stmt = begin_if_stmt ();
12347 finish_if_stmt_cond (build2 (BIT_AND_EXPR, integer_type_node,
12348 current_in_charge_parm,
12351 finish_expr_stmt (exprstmt);
12352 finish_then_clause (if_stmt);
12353 finish_if_stmt (if_stmt);
12356 if (targetm.cxx.cdtor_returns_this ())
12360 val = DECL_ARGUMENTS (current_function_decl);
12361 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
12362 DECL_RESULT (current_function_decl), val);
12363 /* Return the address of the object. */
12364 exprstmt = build_stmt (input_location, RETURN_EXPR, val);
12365 add_stmt (exprstmt);
12369 /* Do the necessary processing for the beginning of a function body, which
12370 in this case includes member-initializers, but not the catch clauses of
12371 a function-try-block. Currently, this means opening a binding level
12372 for the member-initializers (in a ctor) and member cleanups (in a dtor). */
12375 begin_function_body (void)
12379 if (! FUNCTION_NEEDS_BODY_BLOCK (current_function_decl))
12382 if (processing_template_decl)
12383 /* Do nothing now. */;
12385 /* Always keep the BLOCK node associated with the outermost pair of
12386 curly braces of a function. These are needed for correct
12387 operation of dwarfout.c. */
12388 keep_next_level (true);
12390 stmt = begin_compound_stmt (BCS_FN_BODY);
12392 if (processing_template_decl)
12393 /* Do nothing now. */;
12394 else if (DECL_DESTRUCTOR_P (current_function_decl))
12395 begin_destructor_body ();
12400 /* Do the processing for the end of a function body. Currently, this means
12401 closing out the cleanups for fully-constructed bases and members, and in
12402 the case of the destructor, deleting the object if desired. Again, this
12403 is only meaningful for [cd]tors, since they are the only functions where
12404 there is a significant distinction between the main body and any
12405 function catch clauses. Handling, say, main() return semantics here
12406 would be wrong, as flowing off the end of a function catch clause for
12407 main() would also need to return 0. */
12410 finish_function_body (tree compstmt)
12412 if (compstmt == NULL_TREE)
12415 /* Close the block. */
12416 finish_compound_stmt (compstmt);
12418 if (processing_template_decl)
12419 /* Do nothing now. */;
12420 else if (DECL_CONSTRUCTOR_P (current_function_decl))
12421 finish_constructor_body ();
12422 else if (DECL_DESTRUCTOR_P (current_function_decl))
12423 finish_destructor_body ();
12426 /* Given a function, returns the BLOCK corresponding to the outermost level
12427 of curly braces, skipping the artificial block created for constructor
12431 outer_curly_brace_block (tree fndecl)
12433 tree block = BLOCK_SUBBLOCKS (DECL_INITIAL (fndecl));
12434 if (FUNCTION_NEEDS_BODY_BLOCK (current_function_decl))
12435 /* Skip the artificial function body block. */
12436 block = BLOCK_SUBBLOCKS (block);
12440 /* Finish up a function declaration and compile that function
12441 all the way to assembler language output. The free the storage
12442 for the function definition.
12444 FLAGS is a bitwise or of the following values:
12446 We just finished processing the body of an in-class inline
12447 function definition. (This processing will have taken place
12448 after the class definition is complete.) */
12451 finish_function (int flags)
12453 tree fndecl = current_function_decl;
12454 tree fntype, ctype = NULL_TREE;
12455 int inclass_inline = (flags & 2) != 0;
12458 /* When we get some parse errors, we can end up without a
12459 current_function_decl, so cope. */
12460 if (fndecl == NULL_TREE)
12461 return error_mark_node;
12463 gcc_assert (!defer_mark_used_calls);
12464 defer_mark_used_calls = true;
12466 if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fndecl)
12467 && DECL_VIRTUAL_P (fndecl)
12468 && !processing_template_decl)
12470 tree fnclass = DECL_CONTEXT (fndecl);
12471 if (fndecl == CLASSTYPE_KEY_METHOD (fnclass))
12472 keyed_classes = tree_cons (NULL_TREE, fnclass, keyed_classes);
12475 nested = function_depth > 1;
12476 fntype = TREE_TYPE (fndecl);
12478 /* TREE_READONLY (fndecl) = 1;
12479 This caused &foo to be of type ptr-to-const-function
12480 which then got a warning when stored in a ptr-to-function variable. */
12482 gcc_assert (building_stmt_tree ());
12483 /* The current function is being defined, so its DECL_INITIAL should
12484 be set, and unless there's a multiple definition, it should be
12485 error_mark_node. */
12486 gcc_assert (DECL_INITIAL (fndecl) == error_mark_node);
12488 /* For a cloned function, we've already got all the code we need;
12489 there's no need to add any extra bits. */
12490 if (!DECL_CLONED_FUNCTION_P (fndecl))
12492 if (DECL_MAIN_P (current_function_decl))
12496 /* Make it so that `main' always returns 0 by default (or
12499 stmt = finish_return_stmt (integer_one_node);
12501 stmt = finish_return_stmt (integer_zero_node);
12503 /* Hack. We don't want the middle-end to warn that this
12504 return is unreachable, so put the statement on the
12507 location_t linezero = linemap_line_start (line_table, 0, 1);
12508 SET_EXPR_LOCATION (stmt, linezero);
12512 if (use_eh_spec_block (current_function_decl))
12513 finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
12514 (TREE_TYPE (current_function_decl)),
12515 current_eh_spec_block);
12518 /* If we're saving up tree structure, tie off the function now. */
12519 DECL_SAVED_TREE (fndecl) = pop_stmt_list (DECL_SAVED_TREE (fndecl));
12521 finish_fname_decls ();
12523 /* If this function can't throw any exceptions, remember that. */
12524 if (!processing_template_decl
12525 && !cp_function_chain->can_throw
12526 && !flag_non_call_exceptions
12527 && !DECL_REPLACEABLE_P (fndecl))
12528 TREE_NOTHROW (fndecl) = 1;
12530 /* This must come after expand_function_end because cleanups might
12531 have declarations (from inline functions) that need to go into
12532 this function's blocks. */
12534 /* If the current binding level isn't the outermost binding level
12535 for this function, either there is a bug, or we have experienced
12536 syntax errors and the statement tree is malformed. */
12537 if (current_binding_level->kind != sk_function_parms)
12539 /* Make sure we have already experienced errors. */
12540 gcc_assert (errorcount);
12542 /* Throw away the broken statement tree and extra binding
12544 DECL_SAVED_TREE (fndecl) = alloc_stmt_list ();
12546 while (current_binding_level->kind != sk_function_parms)
12548 if (current_binding_level->kind == sk_class)
12549 pop_nested_class ();
12551 poplevel (0, 0, 0);
12554 poplevel (1, 0, 1);
12556 /* Statements should always be full-expressions at the outermost set
12557 of curly braces for a function. */
12558 gcc_assert (stmts_are_full_exprs_p ());
12560 /* Set up the named return value optimization, if we can. Candidate
12561 variables are selected in check_return_expr. */
12562 if (current_function_return_value)
12564 tree r = current_function_return_value;
12567 if (r != error_mark_node
12568 /* This is only worth doing for fns that return in memory--and
12569 simpler, since we don't have to worry about promoted modes. */
12570 && aggregate_value_p (TREE_TYPE (TREE_TYPE (fndecl)), fndecl)
12571 /* Only allow this for variables declared in the outer scope of
12572 the function so we know that their lifetime always ends with a
12573 return; see g++.dg/opt/nrv6.C. We could be more flexible if
12574 we were to do this optimization in tree-ssa. */
12575 && (outer = outer_curly_brace_block (fndecl))
12576 && chain_member (r, BLOCK_VARS (outer)))
12577 finalize_nrv (&DECL_SAVED_TREE (fndecl), r, DECL_RESULT (fndecl));
12579 current_function_return_value = NULL_TREE;
12582 /* Remember that we were in class scope. */
12583 if (current_class_name)
12584 ctype = current_class_type;
12586 /* Must mark the RESULT_DECL as being in this function. */
12587 DECL_CONTEXT (DECL_RESULT (fndecl)) = fndecl;
12589 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
12590 to the FUNCTION_DECL node itself. */
12591 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl)) = fndecl;
12593 /* Save away current state, if appropriate. */
12594 if (!processing_template_decl)
12595 save_function_data (fndecl);
12597 /* Complain if there's just no return statement. */
12598 if (warn_return_type
12599 && TREE_CODE (TREE_TYPE (fntype)) != VOID_TYPE
12600 && !dependent_type_p (TREE_TYPE (fntype))
12601 && !current_function_returns_value && !current_function_returns_null
12602 /* Don't complain if we abort or throw. */
12603 && !current_function_returns_abnormally
12604 /* Don't complain if we are declared noreturn. */
12605 && !TREE_THIS_VOLATILE (fndecl)
12606 && !DECL_NAME (DECL_RESULT (fndecl))
12607 && !TREE_NO_WARNING (fndecl)
12608 /* Structor return values (if any) are set by the compiler. */
12609 && !DECL_CONSTRUCTOR_P (fndecl)
12610 && !DECL_DESTRUCTOR_P (fndecl))
12612 warning (OPT_Wreturn_type,
12613 "no return statement in function returning non-void");
12614 TREE_NO_WARNING (fndecl) = 1;
12617 /* Store the end of the function, so that we get good line number
12618 info for the epilogue. */
12619 cfun->function_end_locus = input_location;
12621 /* Complain about parameters that are only set, but never otherwise used. */
12622 if (warn_unused_but_set_parameter
12623 && !processing_template_decl
12624 && errorcount == unused_but_set_errorcount
12625 && !DECL_CLONED_FUNCTION_P (fndecl))
12629 for (decl = DECL_ARGUMENTS (fndecl);
12631 decl = TREE_CHAIN (decl))
12632 if (TREE_USED (decl)
12633 && TREE_CODE (decl) == PARM_DECL
12634 && !DECL_READ_P (decl)
12635 && DECL_NAME (decl)
12636 && !DECL_ARTIFICIAL (decl)
12637 && !TREE_NO_WARNING (decl)
12638 && !DECL_IN_SYSTEM_HEADER (decl)
12639 && TREE_TYPE (decl) != error_mark_node
12640 && TREE_CODE (TREE_TYPE (decl)) != REFERENCE_TYPE
12641 && (!CLASS_TYPE_P (TREE_TYPE (decl))
12642 || !TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl))))
12643 warning (OPT_Wunused_but_set_parameter,
12644 "parameter %q+D set but not used", decl);
12645 unused_but_set_errorcount = errorcount;
12648 /* Genericize before inlining. */
12649 if (!processing_template_decl)
12651 struct language_function *f = DECL_SAVED_FUNCTION_DATA (fndecl);
12652 invoke_plugin_callbacks (PLUGIN_PRE_GENERICIZE, fndecl);
12653 cp_genericize (fndecl);
12654 /* Clear out the bits we don't need. */
12655 f->x_current_class_ptr = NULL;
12656 f->x_current_class_ref = NULL;
12657 f->x_eh_spec_block = NULL;
12658 f->x_in_charge_parm = NULL;
12659 f->x_vtt_parm = NULL;
12660 f->x_return_value = NULL;
12661 f->bindings = NULL;
12662 f->extern_decl_map = NULL;
12664 /* Clear out the bits we don't need. */
12665 local_names = NULL;
12667 /* We're leaving the context of this function, so zap cfun. It's still in
12668 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
12670 current_function_decl = NULL;
12672 /* If this is an in-class inline definition, we may have to pop the
12673 bindings for the template parameters that we added in
12674 maybe_begin_member_template_processing when start_function was
12676 if (inclass_inline)
12677 maybe_end_member_template_processing ();
12679 /* Leave the scope of the class. */
12681 pop_nested_class ();
12687 /* Let the error reporting routines know that we're outside a
12688 function. For a nested function, this value is used in
12689 cxx_pop_function_context and then reset via pop_function_context. */
12690 current_function_decl = NULL_TREE;
12692 defer_mark_used_calls = false;
12693 if (deferred_mark_used_calls)
12698 for (i = 0; VEC_iterate (tree, deferred_mark_used_calls, i, decl); i++)
12700 VEC_free (tree, gc, deferred_mark_used_calls);
12706 /* Create the FUNCTION_DECL for a function definition.
12707 DECLSPECS and DECLARATOR are the parts of the declaration;
12708 they describe the return type and the name of the function,
12709 but twisted together in a fashion that parallels the syntax of C.
12711 This function creates a binding context for the function body
12712 as well as setting up the FUNCTION_DECL in current_function_decl.
12714 Returns a FUNCTION_DECL on success.
12716 If the DECLARATOR is not suitable for a function (it defines a datum
12717 instead), we return 0, which tells yyparse to report a parse error.
12719 May return void_type_node indicating that this method is actually
12720 a friend. See grokfield for more details.
12722 Came here with a `.pushlevel' .
12724 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
12725 CHANGES TO CODE IN `grokfield'. */
12728 grokmethod (cp_decl_specifier_seq *declspecs,
12729 const cp_declarator *declarator, tree attrlist)
12731 tree fndecl = grokdeclarator (declarator, declspecs, MEMFUNCDEF, 0,
12734 if (fndecl == error_mark_node)
12735 return error_mark_node;
12737 if (fndecl == NULL || TREE_CODE (fndecl) != FUNCTION_DECL)
12739 error ("invalid member function declaration");
12740 return error_mark_node;
12744 cplus_decl_attributes (&fndecl, attrlist, 0);
12746 /* Pass friends other than inline friend functions back. */
12747 if (fndecl == void_type_node)
12750 if (DECL_IN_AGGR_P (fndecl))
12752 if (DECL_CONTEXT (fndecl)
12753 && TREE_CODE (DECL_CONTEXT (fndecl)) != NAMESPACE_DECL)
12754 error ("%qD is already defined in class %qT", fndecl,
12755 DECL_CONTEXT (fndecl));
12756 return error_mark_node;
12759 check_template_shadow (fndecl);
12761 DECL_DECLARED_INLINE_P (fndecl) = 1;
12762 DECL_NO_INLINE_WARNING_P (fndecl) = 1;
12764 /* We process method specializations in finish_struct_1. */
12765 if (processing_template_decl && !DECL_TEMPLATE_SPECIALIZATION (fndecl))
12767 fndecl = push_template_decl (fndecl);
12768 if (fndecl == error_mark_node)
12772 if (! DECL_FRIEND_P (fndecl))
12774 if (TREE_CHAIN (fndecl))
12776 fndecl = copy_node (fndecl);
12777 TREE_CHAIN (fndecl) = NULL_TREE;
12781 cp_finish_decl (fndecl, NULL_TREE, false, NULL_TREE, 0);
12783 DECL_IN_AGGR_P (fndecl) = 1;
12788 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
12789 we can lay it out later, when and if its type becomes complete. */
12792 maybe_register_incomplete_var (tree var)
12794 gcc_assert (TREE_CODE (var) == VAR_DECL);
12796 /* Keep track of variables with incomplete types. */
12797 if (!processing_template_decl && TREE_TYPE (var) != error_mark_node
12798 && DECL_EXTERNAL (var))
12800 tree inner_type = TREE_TYPE (var);
12802 while (TREE_CODE (inner_type) == ARRAY_TYPE)
12803 inner_type = TREE_TYPE (inner_type);
12804 inner_type = TYPE_MAIN_VARIANT (inner_type);
12806 if ((!COMPLETE_TYPE_P (inner_type) && CLASS_TYPE_P (inner_type))
12807 /* RTTI TD entries are created while defining the type_info. */
12808 || (TYPE_LANG_SPECIFIC (inner_type)
12809 && TYPE_BEING_DEFINED (inner_type)))
12810 incomplete_vars = tree_cons (inner_type, var, incomplete_vars);
12814 /* Called when a class type (given by TYPE) is defined. If there are
12815 any existing VAR_DECLs whose type has been completed by this
12816 declaration, update them now. */
12819 complete_vars (tree type)
12821 tree *list = &incomplete_vars;
12823 gcc_assert (CLASS_TYPE_P (type));
12826 if (same_type_p (type, TREE_PURPOSE (*list)))
12828 tree var = TREE_VALUE (*list);
12829 tree type = TREE_TYPE (var);
12830 /* Complete the type of the variable. The VAR_DECL itself
12831 will be laid out in expand_expr. */
12832 complete_type (type);
12833 cp_apply_type_quals_to_decl (cp_type_quals (type), var);
12834 /* Remove this entry from the list. */
12835 *list = TREE_CHAIN (*list);
12838 list = &TREE_CHAIN (*list);
12841 /* Check for pending declarations which may have abstract type. */
12842 complete_type_check_abstract (type);
12845 /* If DECL is of a type which needs a cleanup, build and return an
12846 expression to perform that cleanup here. Return NULL_TREE if no
12847 cleanup need be done. */
12850 cxx_maybe_build_cleanup (tree decl)
12856 /* Assume no cleanup is required. */
12857 cleanup = NULL_TREE;
12859 if (error_operand_p (decl))
12862 /* Handle "__attribute__((cleanup))". We run the cleanup function
12863 before the destructor since the destructor is what actually
12864 terminates the lifetime of the object. */
12865 attr = lookup_attribute ("cleanup", DECL_ATTRIBUTES (decl));
12872 /* Get the name specified by the user for the cleanup function. */
12873 id = TREE_VALUE (TREE_VALUE (attr));
12874 /* Look up the name to find the cleanup function to call. It is
12875 important to use lookup_name here because that is what is
12876 used in c-common.c:handle_cleanup_attribute when performing
12877 initial checks on the attribute. Note that those checks
12878 include ensuring that the function found is not an overloaded
12879 function, or an object with an overloaded call operator,
12880 etc.; we can rely on the fact that the function found is an
12881 ordinary FUNCTION_DECL. */
12882 fn = lookup_name (id);
12883 arg = build_address (decl);
12885 cleanup = cp_build_function_call (fn, build_tree_list (NULL_TREE,
12887 tf_warning_or_error);
12889 /* Handle ordinary C++ destructors. */
12890 type = TREE_TYPE (decl);
12891 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
12893 int flags = LOOKUP_NORMAL|LOOKUP_DESTRUCTOR;
12894 bool has_vbases = (TREE_CODE (type) == RECORD_TYPE
12895 && CLASSTYPE_VBASECLASSES (type));
12899 if (TREE_CODE (type) == ARRAY_TYPE)
12902 addr = build_address (decl);
12904 /* Optimize for space over speed here. */
12905 if (!has_vbases || flag_expensive_optimizations)
12906 flags |= LOOKUP_NONVIRTUAL;
12908 call = build_delete (TREE_TYPE (addr), addr,
12909 sfk_complete_destructor, flags, 0);
12911 cleanup = build_compound_expr (input_location, cleanup, call);
12919 /* When a stmt has been parsed, this function is called. */
12926 /* Return the FUNCTION_TYPE that corresponds to MEMFNTYPE, which can be a
12927 FUNCTION_DECL, METHOD_TYPE, FUNCTION_TYPE, pointer or reference to
12928 METHOD_TYPE or FUNCTION_TYPE, or pointer to member function. */
12931 static_fn_type (tree memfntype)
12936 if (TYPE_PTRMEMFUNC_P (memfntype))
12937 memfntype = TYPE_PTRMEMFUNC_FN_TYPE (memfntype);
12938 if (POINTER_TYPE_P (memfntype)
12939 || TREE_CODE (memfntype) == FUNCTION_DECL)
12940 memfntype = TREE_TYPE (memfntype);
12941 if (TREE_CODE (memfntype) == FUNCTION_TYPE)
12943 gcc_assert (TREE_CODE (memfntype) == METHOD_TYPE);
12944 args = TYPE_ARG_TYPES (memfntype);
12945 fntype = build_function_type (TREE_TYPE (memfntype), TREE_CHAIN (args));
12946 fntype = apply_memfn_quals (fntype, type_memfn_quals (memfntype));
12947 fntype = (cp_build_type_attribute_variant
12948 (fntype, TYPE_ATTRIBUTES (memfntype)));
12949 fntype = (build_exception_variant
12950 (fntype, TYPE_RAISES_EXCEPTIONS (memfntype)));
12954 /* DECL was originally constructed as a non-static member function,
12955 but turned out to be static. Update it accordingly. */
12958 revert_static_member_fn (tree decl)
12960 TREE_TYPE (decl) = static_fn_type (decl);
12962 if (cp_type_quals (TREE_TYPE (decl)) != TYPE_UNQUALIFIED)
12963 error ("static member function %q#D declared with type qualifiers", decl);
12965 if (DECL_ARGUMENTS (decl))
12966 DECL_ARGUMENTS (decl) = TREE_CHAIN (DECL_ARGUMENTS (decl));
12967 DECL_STATIC_FUNCTION_P (decl) = 1;
12970 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
12971 one of the language-independent trees. */
12973 enum cp_tree_node_structure_enum
12974 cp_tree_node_structure (union lang_tree_node * t)
12976 switch (TREE_CODE (&t->generic))
12978 case DEFAULT_ARG: return TS_CP_DEFAULT_ARG;
12979 case IDENTIFIER_NODE: return TS_CP_IDENTIFIER;
12980 case OVERLOAD: return TS_CP_OVERLOAD;
12981 case TEMPLATE_PARM_INDEX: return TS_CP_TPI;
12982 case PTRMEM_CST: return TS_CP_PTRMEM;
12983 case BASELINK: return TS_CP_BASELINK;
12984 case STATIC_ASSERT: return TS_CP_STATIC_ASSERT;
12985 case ARGUMENT_PACK_SELECT: return TS_CP_ARGUMENT_PACK_SELECT;
12986 case TRAIT_EXPR: return TS_CP_TRAIT_EXPR;
12987 case LAMBDA_EXPR: return TS_CP_LAMBDA_EXPR;
12988 case TEMPLATE_INFO: return TS_CP_TEMPLATE_INFO;
12989 default: return TS_CP_GENERIC;
12993 /* Build the void_list_node (void_type_node having been created). */
12995 build_void_list_node (void)
12997 tree t = build_tree_list (NULL_TREE, void_type_node);
13002 cp_missing_noreturn_ok_p (tree decl)
13004 /* A missing noreturn is ok for the `main' function. */
13005 return DECL_MAIN_P (decl);
13008 /* Return the COMDAT group into which DECL should be placed. */
13011 cxx_comdat_group (tree decl)
13015 /* Virtual tables, construction virtual tables, and virtual table
13016 tables all go in a single COMDAT group, named after the primary
13018 if (TREE_CODE (decl) == VAR_DECL && DECL_VTABLE_OR_VTT_P (decl))
13019 name = DECL_ASSEMBLER_NAME (CLASSTYPE_VTABLES (DECL_CONTEXT (decl)));
13020 /* For all other DECLs, the COMDAT group is the mangled name of the
13021 declaration itself. */
13024 while (DECL_THUNK_P (decl))
13026 /* If TARGET_USE_LOCAL_THUNK_ALIAS_P, use_thunk puts the thunk
13027 into the same section as the target function. In that case
13028 we must return target's name. */
13029 tree target = THUNK_TARGET (decl);
13030 if (TARGET_USE_LOCAL_THUNK_ALIAS_P (target)
13031 && DECL_SECTION_NAME (target) != NULL
13032 && DECL_ONE_ONLY (target))
13037 name = DECL_ASSEMBLER_NAME (decl);
13043 #include "gt-cp-decl.h"