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 Free Software Foundation, Inc.
4 Contributed by Michael Tiemann (tiemann@cygnus.com)
6 This file is part of GCC.
8 GCC is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2, or (at your option)
13 GCC is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING. If not, write to
20 the Free Software Foundation, 51 Franklin Street, Fifth Floor,
21 Boston, MA 02110-1301, USA. */
24 /* Process declarations and symbol lookup for C++ front end.
25 Also constructs types; the standard scalar types at initialization,
26 and structure, union, array and enum types when they are declared. */
28 /* ??? not all decl nodes are given the most useful possible
29 line numbers. For example, the CONST_DECLs for enum values. */
33 #include "coretypes.h"
40 #include "tree-inline.h"
50 #include "diagnostic.h"
54 #include "tree-flow.h"
55 #include "pointer-set.h"
57 static tree grokparms (cp_parameter_declarator *, tree *);
58 static const char *redeclaration_error_message (tree, tree);
60 static int decl_jump_unsafe (tree);
61 static void require_complete_types_for_parms (tree);
62 static int ambi_op_p (enum tree_code);
63 static int unary_op_p (enum tree_code);
64 static void push_local_name (tree);
65 static tree grok_reference_init (tree, tree, tree, tree *);
66 static tree grokvardecl (tree, tree, const cp_decl_specifier_seq *,
68 static void record_unknown_type (tree, const char *);
69 static tree builtin_function_1 (tree, tree);
70 static tree build_library_fn_1 (tree, enum tree_code, tree);
71 static int member_function_or_else (tree, tree, enum overload_flags);
72 static void bad_specifiers (tree, const char *, int, int, int, int,
74 static void check_for_uninitialized_const_var (tree);
75 static hashval_t typename_hash (const void *);
76 static int typename_compare (const void *, const void *);
77 static tree local_variable_p_walkfn (tree *, int *, void *);
78 static tree record_builtin_java_type (const char *, int);
79 static const char *tag_name (enum tag_types);
80 static tree lookup_and_check_tag (enum tag_types, tree, tag_scope, bool);
81 static int walk_namespaces_r (tree, walk_namespaces_fn, void *);
82 static void maybe_deduce_size_from_array_init (tree, tree);
83 static void layout_var_decl (tree);
84 static void maybe_commonize_var (tree);
85 static tree check_initializer (tree, tree, int, tree *);
86 static void make_rtl_for_nonlocal_decl (tree, tree, const char *);
87 static void save_function_data (tree);
88 static void check_function_type (tree, tree);
89 static void finish_constructor_body (void);
90 static void begin_destructor_body (void);
91 static void finish_destructor_body (void);
92 static tree create_array_type_for_decl (tree, tree, tree);
93 static tree get_atexit_node (void);
94 static tree get_dso_handle_node (void);
95 static tree start_cleanup_fn (void);
96 static void end_cleanup_fn (void);
97 static tree cp_make_fname_decl (tree, int);
98 static void initialize_predefined_identifiers (void);
99 static tree check_special_function_return_type
100 (special_function_kind, tree, tree);
101 static tree push_cp_library_fn (enum tree_code, tree);
102 static tree build_cp_library_fn (tree, enum tree_code, tree);
103 static void store_parm_decls (tree);
104 static void initialize_local_var (tree, tree);
105 static void expand_static_init (tree, tree);
106 static tree next_initializable_field (tree);
108 /* The following symbols are subsumed in the cp_global_trees array, and
109 listed here individually for documentation purposes.
112 tree wchar_decl_node;
114 tree vtable_entry_type;
115 tree delta_type_node;
116 tree __t_desc_type_node;
118 tree class_type_node;
119 tree unknown_type_node;
121 Array type `vtable_entry_type[]'
124 tree vtbl_ptr_type_node;
131 A FUNCTION_DECL which can call `abort'. Not necessarily the
132 one that the user will declare, but sufficient to be called
133 by routines that want to abort the program.
137 The FUNCTION_DECL for the default `::operator delete'.
139 tree global_delete_fndecl;
142 tree type_info_type_node, tinfo_decl_id, tinfo_decl_type;
143 tree tinfo_var_id; */
145 tree cp_global_trees[CPTI_MAX];
147 /* Indicates that there is a type value in some namespace, although
148 that is not necessarily in scope at the moment. */
150 tree global_type_node;
152 /* The node that holds the "name" of the global scope. */
153 tree global_scope_name;
155 #define local_names cp_function_chain->x_local_names
157 /* A list of objects which have constructors or destructors
158 which reside in the global scope. The decl is stored in
159 the TREE_VALUE slot and the initializer is stored
160 in the TREE_PURPOSE slot. */
161 tree static_aggregates;
165 /* A node for the integer constants 2, and 3. */
167 tree integer_two_node, integer_three_node;
169 /* Used only for jumps to as-yet undefined labels, since jumps to
170 defined labels can have their validity checked immediately. */
172 struct named_label_use_entry GTY(())
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 named_label_entry GTY(())
197 /* The decl itself. */
200 /* The binding level to which the label is *currently* attached.
201 This is initially set to the binding level in which the label
202 is defined, but is modified as scopes are closed. */
203 struct cp_binding_level *binding_level;
204 /* The head of the names list that was current when the label was
205 defined, or the inner scope popped. These are the decls that will
206 be skipped when jumping to the label. */
208 /* A tree list of all decls from all binding levels that would be
209 crossed by a backward branch to the label. */
212 /* A list of uses of the label, before the label is defined. */
213 struct named_label_use_entry *uses;
215 /* The following bits are set after the label is defined, and are
216 updated as scopes are popped. They indicate that a backward jump
217 to the label will illegally enter a scope of the given flavor. */
223 #define named_labels cp_function_chain->x_named_labels
225 /* The number of function bodies which we are currently processing.
226 (Zero if we are at namespace scope, one inside the body of a
227 function, two inside the body of a function in a local class, etc.) */
230 /* States indicating how grokdeclarator() should handle declspecs marked
231 with __attribute__((deprecated)). An object declared as
232 __attribute__((deprecated)) suppresses warnings of uses of other
235 enum deprecated_states {
240 static enum deprecated_states deprecated_state = DEPRECATED_NORMAL;
243 /* A TREE_LIST of VAR_DECLs. The TREE_PURPOSE is a RECORD_TYPE or
244 UNION_TYPE; the TREE_VALUE is a VAR_DECL with that type. At the
245 time the VAR_DECL was declared, the type was incomplete. */
247 static GTY(()) tree incomplete_vars;
249 /* Returns the kind of template specialization we are currently
250 processing, given that it's declaration contained N_CLASS_SCOPES
251 explicit scope qualifications. */
254 current_tmpl_spec_kind (int n_class_scopes)
256 int n_template_parm_scopes = 0;
257 int seen_specialization_p = 0;
258 int innermost_specialization_p = 0;
259 struct cp_binding_level *b;
261 /* Scan through the template parameter scopes. */
262 for (b = current_binding_level;
263 b->kind == sk_template_parms;
266 /* If we see a specialization scope inside a parameter scope,
267 then something is wrong. That corresponds to a declaration
270 template <class T> template <> ...
272 which is always invalid since [temp.expl.spec] forbids the
273 specialization of a class member template if the enclosing
274 class templates are not explicitly specialized as well. */
275 if (b->explicit_spec_p)
277 if (n_template_parm_scopes == 0)
278 innermost_specialization_p = 1;
280 seen_specialization_p = 1;
282 else if (seen_specialization_p == 1)
283 return tsk_invalid_member_spec;
285 ++n_template_parm_scopes;
288 /* Handle explicit instantiations. */
289 if (processing_explicit_instantiation)
291 if (n_template_parm_scopes != 0)
292 /* We've seen a template parameter list during an explicit
293 instantiation. For example:
295 template <class T> template void f(int);
297 This is erroneous. */
298 return tsk_invalid_expl_inst;
300 return tsk_expl_inst;
303 if (n_template_parm_scopes < n_class_scopes)
304 /* We've not seen enough template headers to match all the
305 specialized classes present. For example:
307 template <class T> void R<T>::S<T>::f(int);
309 This is invalid; there needs to be one set of template
310 parameters for each class. */
311 return tsk_insufficient_parms;
312 else if (n_template_parm_scopes == n_class_scopes)
313 /* We're processing a non-template declaration (even though it may
314 be a member of a template class.) For example:
316 template <class T> void S<T>::f(int);
318 The `class T' maches the `S<T>', leaving no template headers
319 corresponding to the `f'. */
321 else if (n_template_parm_scopes > n_class_scopes + 1)
322 /* We've got too many template headers. For example:
324 template <> template <class T> void f (T);
326 There need to be more enclosing classes. */
327 return tsk_excessive_parms;
329 /* This must be a template. It's of the form:
331 template <class T> template <class U> void S<T>::f(U);
333 This is a specialization if the innermost level was a
334 specialization; otherwise it's just a definition of the
336 return innermost_specialization_p ? tsk_expl_spec : tsk_template;
339 /* Exit the current scope. */
347 /* When a label goes out of scope, check to see if that label was used
348 in a valid manner, and issue any appropriate warnings or errors. */
351 pop_label (tree label, tree old_value)
353 if (!processing_template_decl)
355 if (DECL_INITIAL (label) == NULL_TREE)
359 error ("label %q+D used but not defined", label);
360 #ifdef USE_MAPPED_LOCATION
361 location = input_location; /* FIXME want (input_filename, (line)0) */
363 location.file = input_filename;
366 /* Avoid crashing later. */
367 define_label (location, DECL_NAME (label));
370 warn_for_unused_label (label);
373 SET_IDENTIFIER_LABEL_VALUE (DECL_NAME (label), old_value);
376 /* At the end of a function, all labels declared within the function
377 go out of scope. BLOCK is the top-level block for the
381 pop_labels_1 (void **slot, void *data)
383 struct named_label_entry *ent = (struct named_label_entry *) *slot;
384 tree block = (tree) data;
386 pop_label (ent->label_decl, NULL_TREE);
388 /* Put the labels into the "variables" of the top-level block,
389 so debugger can see them. */
390 TREE_CHAIN (ent->label_decl) = BLOCK_VARS (block);
391 BLOCK_VARS (block) = ent->label_decl;
393 htab_clear_slot (named_labels, slot);
399 pop_labels (tree block)
403 htab_traverse (named_labels, pop_labels_1, block);
408 /* At the end of a block with local labels, restore the outer definition. */
411 pop_local_label (tree label, tree old_value)
413 struct named_label_entry dummy;
416 pop_label (label, old_value);
418 dummy.label_decl = label;
419 slot = htab_find_slot (named_labels, &dummy, NO_INSERT);
420 htab_clear_slot (named_labels, slot);
423 /* The following two routines are used to interface to Objective-C++.
424 The binding level is purposely treated as an opaque type. */
427 objc_get_current_scope (void)
429 return current_binding_level;
432 /* The following routine is used by the NeXT-style SJLJ exceptions;
433 variables get marked 'volatile' so as to not be clobbered by
434 _setjmp()/_longjmp() calls. All variables in the current scope,
435 as well as parent scopes up to (but not including) ENCLOSING_BLK
436 shall be thusly marked. */
439 objc_mark_locals_volatile (void *enclosing_blk)
441 struct cp_binding_level *scope;
443 for (scope = current_binding_level;
444 scope && scope != enclosing_blk;
445 scope = scope->level_chain)
449 for (decl = scope->names; decl; decl = TREE_CHAIN (decl))
450 objc_volatilize_decl (decl);
452 /* Do not climb up past the current function. */
453 if (scope->kind == sk_function_parms)
458 /* Update data for defined and undefined labels when leaving a scope. */
461 poplevel_named_label_1 (void **slot, void *data)
463 struct named_label_entry *ent = (struct named_label_entry *) *slot;
464 struct cp_binding_level *bl = (struct cp_binding_level *) data;
465 struct cp_binding_level *obl = bl->level_chain;
467 if (ent->binding_level == bl)
471 for (decl = ent->names_in_scope; decl; decl = TREE_CHAIN (decl))
472 if (decl_jump_unsafe (decl))
473 ent->bad_decls = tree_cons (NULL, decl, ent->bad_decls);
475 ent->binding_level = obl;
476 ent->names_in_scope = obl->names;
480 ent->in_try_scope = true;
483 ent->in_catch_scope = true;
486 ent->in_omp_scope = true;
494 struct named_label_use_entry *use;
496 for (use = ent->uses; use ; use = use->next)
497 if (use->binding_level == bl)
499 use->binding_level = obl;
500 use->names_in_scope = obl->names;
501 if (bl->kind == sk_omp)
502 use->in_omp_scope = true;
509 /* Exit a binding level.
510 Pop the level off, and restore the state of the identifier-decl mappings
511 that were in effect when this level was entered.
513 If KEEP == 1, this level had explicit declarations, so
514 and create a "block" (a BLOCK node) for the level
515 to record its declarations and subblocks for symbol table output.
517 If FUNCTIONBODY is nonzero, this level is the body of a function,
518 so create a block as if KEEP were set and also clear out all
521 If REVERSE is nonzero, reverse the order of decls before putting
522 them into the BLOCK. */
525 poplevel (int keep, int reverse, int functionbody)
528 /* The chain of decls was accumulated in reverse order.
529 Put it into forward order, just for cleanliness. */
531 int tmp = functionbody;
532 int real_functionbody;
536 int leaving_for_scope;
539 timevar_push (TV_NAME_LOOKUP);
544 gcc_assert (current_binding_level->kind != sk_class);
546 real_functionbody = (current_binding_level->kind == sk_cleanup
547 ? ((functionbody = 0), tmp) : functionbody);
548 subblocks = functionbody >= 0 ? current_binding_level->blocks : 0;
550 gcc_assert (!VEC_length(cp_class_binding,
551 current_binding_level->class_shadowed));
553 /* We used to use KEEP == 2 to indicate that the new block should go
554 at the beginning of the list of blocks at this binding level,
555 rather than the end. This hack is no longer used. */
556 gcc_assert (keep == 0 || keep == 1);
558 if (current_binding_level->keep)
561 /* Any uses of undefined labels, and any defined labels, now operate
562 under constraints of next binding contour. */
563 if (cfun && !functionbody && named_labels)
564 htab_traverse (named_labels, poplevel_named_label_1,
565 current_binding_level);
567 /* Get the decls in the order they were written.
568 Usually current_binding_level->names is in reverse order.
569 But parameter decls were previously put in forward order. */
572 current_binding_level->names
573 = decls = nreverse (current_binding_level->names);
575 decls = current_binding_level->names;
577 /* If there were any declarations or structure tags in that level,
578 or if this level is a function body,
579 create a BLOCK to record them for the life of this function. */
581 if (keep == 1 || functionbody)
582 block = make_node (BLOCK);
583 if (block != NULL_TREE)
585 BLOCK_VARS (block) = decls;
586 BLOCK_SUBBLOCKS (block) = subblocks;
589 /* In each subblock, record that this is its superior. */
591 for (link = subblocks; link; link = TREE_CHAIN (link))
592 BLOCK_SUPERCONTEXT (link) = block;
594 /* We still support the old for-scope rules, whereby the variables
595 in a for-init statement were in scope after the for-statement
596 ended. We only use the new rules if flag_new_for_scope is
599 = current_binding_level->kind == sk_for && flag_new_for_scope == 1;
601 /* Before we remove the declarations first check for unused variables. */
602 if (warn_unused_variable
603 && !processing_template_decl)
604 for (decl = getdecls (); decl; decl = TREE_CHAIN (decl))
605 if (TREE_CODE (decl) == VAR_DECL
606 && ! TREE_USED (decl)
607 && ! DECL_IN_SYSTEM_HEADER (decl)
608 && DECL_NAME (decl) && ! DECL_ARTIFICIAL (decl))
609 warning (OPT_Wunused_variable, "unused variable %q+D", decl);
611 /* Remove declarations for all the DECLs in this level. */
612 for (link = decls; link; link = TREE_CHAIN (link))
614 if (leaving_for_scope && TREE_CODE (link) == VAR_DECL
617 tree name = DECL_NAME (link);
621 ob = outer_binding (name,
622 IDENTIFIER_BINDING (name),
625 ns_binding = IDENTIFIER_NAMESPACE_VALUE (name);
627 ns_binding = NULL_TREE;
629 if (ob && ob->scope == current_binding_level->level_chain)
630 /* We have something like:
635 and we are leaving the `for' scope. There's no reason to
636 keep the binding of the inner `i' in this case. */
637 pop_binding (name, link);
638 else if ((ob && (TREE_CODE (ob->value) == TYPE_DECL))
639 || (ns_binding && TREE_CODE (ns_binding) == TYPE_DECL))
640 /* Here, we have something like:
648 We must pop the for-scope binding so we know what's a
649 type and what isn't. */
650 pop_binding (name, link);
653 /* Mark this VAR_DECL as dead so that we can tell we left it
654 there only for backward compatibility. */
655 DECL_DEAD_FOR_LOCAL (link) = 1;
657 /* Keep track of what should have happened when we
658 popped the binding. */
661 SET_DECL_SHADOWED_FOR_VAR (link, ob->value);
662 DECL_HAS_SHADOWED_FOR_VAR_P (link) = 1;
665 /* Add it to the list of dead variables in the next
666 outermost binding to that we can remove these when we
667 leave that binding. */
668 current_binding_level->level_chain->dead_vars_from_for
669 = tree_cons (NULL_TREE, link,
670 current_binding_level->level_chain->
673 /* Although we don't pop the cxx_binding, we do clear
674 its SCOPE since the scope is going away now. */
675 IDENTIFIER_BINDING (name)->scope
676 = current_binding_level->level_chain;
683 /* Remove the binding. */
686 if (TREE_CODE (decl) == TREE_LIST)
687 decl = TREE_VALUE (decl);
690 if (TREE_CODE (name) == OVERLOAD)
691 name = OVL_FUNCTION (name);
693 gcc_assert (DECL_P (name));
694 pop_binding (DECL_NAME (name), decl);
698 /* Remove declarations for any `for' variables from inner scopes
699 that we kept around. */
700 for (link = current_binding_level->dead_vars_from_for;
701 link; link = TREE_CHAIN (link))
702 pop_binding (DECL_NAME (TREE_VALUE (link)), TREE_VALUE (link));
704 /* Restore the IDENTIFIER_TYPE_VALUEs. */
705 for (link = current_binding_level->type_shadowed;
706 link; link = TREE_CHAIN (link))
707 SET_IDENTIFIER_TYPE_VALUE (TREE_PURPOSE (link), TREE_VALUE (link));
709 /* Restore the IDENTIFIER_LABEL_VALUEs for local labels. */
710 for (link = current_binding_level->shadowed_labels;
712 link = TREE_CHAIN (link))
713 pop_local_label (TREE_VALUE (link), TREE_PURPOSE (link));
715 /* There may be OVERLOADs (wrapped in TREE_LISTs) on the BLOCK_VARs
716 list if a `using' declaration put them there. The debugging
717 back ends won't understand OVERLOAD, so we remove them here.
718 Because the BLOCK_VARS are (temporarily) shared with
719 CURRENT_BINDING_LEVEL->NAMES we must do this fixup after we have
720 popped all the bindings. */
725 for (d = &BLOCK_VARS (block); *d; )
727 if (TREE_CODE (*d) == TREE_LIST)
728 *d = TREE_CHAIN (*d);
730 d = &TREE_CHAIN (*d);
734 /* If the level being exited is the top level of a function,
735 check over all the labels. */
738 /* Since this is the top level block of a function, the vars are
739 the function's parameters. Don't leave them in the BLOCK
740 because they are found in the FUNCTION_DECL instead. */
741 BLOCK_VARS (block) = 0;
745 kind = current_binding_level->kind;
746 if (kind == sk_cleanup)
750 /* If this is a temporary binding created for a cleanup, then we'll
751 have pushed a statement list level. Pop that, create a new
752 BIND_EXPR for the block, and insert it into the stream. */
753 stmt = pop_stmt_list (current_binding_level->statement_list);
754 stmt = c_build_bind_expr (block, stmt);
761 /* The current function is being defined, so its DECL_INITIAL
762 should be error_mark_node. */
763 gcc_assert (DECL_INITIAL (current_function_decl) == error_mark_node);
764 DECL_INITIAL (current_function_decl) = block;
767 current_binding_level->blocks
768 = chainon (current_binding_level->blocks, block);
770 /* If we did not make a block for the level just exited,
771 any blocks made for inner levels
772 (since they cannot be recorded as subblocks in that level)
773 must be carried forward so they will later become subblocks
774 of something else. */
776 current_binding_level->blocks
777 = chainon (current_binding_level->blocks, subblocks);
779 /* Each and every BLOCK node created here in `poplevel' is important
780 (e.g. for proper debugging information) so if we created one
781 earlier, mark it as "used". */
783 TREE_USED (block) = 1;
785 /* All temporary bindings created for cleanups are popped silently. */
786 if (kind == sk_cleanup)
789 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, block);
792 /* Insert BLOCK at the end of the list of subblocks of the
793 current binding level. This is used when a BIND_EXPR is expanded,
794 to handle the BLOCK node inside the BIND_EXPR. */
797 insert_block (tree block)
799 TREE_USED (block) = 1;
800 current_binding_level->blocks
801 = chainon (current_binding_level->blocks, block);
804 /* Walk all the namespaces contained NAMESPACE, including NAMESPACE
805 itself, calling F for each. The DATA is passed to F as well. */
808 walk_namespaces_r (tree namespace, walk_namespaces_fn f, void* data)
811 tree current = NAMESPACE_LEVEL (namespace)->namespaces;
813 result |= (*f) (namespace, data);
815 for (; current; current = TREE_CHAIN (current))
816 result |= walk_namespaces_r (current, f, data);
821 /* Walk all the namespaces, calling F for each. The DATA is passed to
825 walk_namespaces (walk_namespaces_fn f, void* data)
827 return walk_namespaces_r (global_namespace, f, data);
830 /* Call wrapup_globals_declarations for the globals in NAMESPACE. If
831 DATA is non-NULL, this is the last time we will call
832 wrapup_global_declarations for this NAMESPACE. */
835 wrapup_globals_for_namespace (tree namespace, void* data)
837 struct cp_binding_level *level = NAMESPACE_LEVEL (namespace);
838 VEC(tree,gc) *statics = level->static_decls;
839 tree *vec = VEC_address (tree, statics);
840 int len = VEC_length (tree, statics);
841 int last_time = (data != 0);
845 check_global_declarations (vec, len);
846 emit_debug_global_declarations (vec, len);
850 /* Write out any globals that need to be output. */
851 return wrapup_global_declarations (vec, len);
855 /* In C++, you don't have to write `struct S' to refer to `S'; you
856 can just use `S'. We accomplish this by creating a TYPE_DECL as
857 if the user had written `typedef struct S S'. Create and return
858 the TYPE_DECL for TYPE. */
861 create_implicit_typedef (tree name, tree type)
865 decl = build_decl (TYPE_DECL, name, type);
866 DECL_ARTIFICIAL (decl) = 1;
867 /* There are other implicit type declarations, like the one *within*
868 a class that allows you to write `S::S'. We must distinguish
870 SET_DECL_IMPLICIT_TYPEDEF_P (decl);
871 TYPE_NAME (type) = decl;
876 /* Remember a local name for name-mangling purposes. */
879 push_local_name (tree decl)
884 timevar_push (TV_NAME_LOOKUP);
886 name = DECL_NAME (decl);
888 nelts = VEC_length (tree, local_names);
889 for (i = 0; i < nelts; i++)
891 t = VEC_index (tree, local_names, i);
892 if (DECL_NAME (t) == name)
894 if (!DECL_LANG_SPECIFIC (decl))
895 retrofit_lang_decl (decl);
896 DECL_LANG_SPECIFIC (decl)->decl_flags.u2sel = 1;
897 if (DECL_LANG_SPECIFIC (t))
898 DECL_DISCRIMINATOR (decl) = DECL_DISCRIMINATOR (t) + 1;
900 DECL_DISCRIMINATOR (decl) = 1;
902 VEC_replace (tree, local_names, i, decl);
903 timevar_pop (TV_NAME_LOOKUP);
908 VEC_safe_push (tree, gc, local_names, decl);
909 timevar_pop (TV_NAME_LOOKUP);
912 /* Subroutine of duplicate_decls: return truthvalue of whether
913 or not types of these decls match.
915 For C++, we must compare the parameter list so that `int' can match
916 `int&' in a parameter position, but `int&' is not confused with
920 decls_match (tree newdecl, tree olddecl)
924 if (newdecl == olddecl)
927 if (TREE_CODE (newdecl) != TREE_CODE (olddecl))
928 /* If the two DECLs are not even the same kind of thing, we're not
929 interested in their types. */
932 if (TREE_CODE (newdecl) == FUNCTION_DECL)
934 tree f1 = TREE_TYPE (newdecl);
935 tree f2 = TREE_TYPE (olddecl);
936 tree p1 = TYPE_ARG_TYPES (f1);
937 tree p2 = TYPE_ARG_TYPES (f2);
939 if (CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl)
940 && ! (DECL_EXTERN_C_P (newdecl)
941 && DECL_EXTERN_C_P (olddecl)))
944 if (TREE_CODE (f1) != TREE_CODE (f2))
947 if (same_type_p (TREE_TYPE (f1), TREE_TYPE (f2)))
949 if (p2 == NULL_TREE && DECL_EXTERN_C_P (olddecl)
950 && (DECL_BUILT_IN (olddecl)
951 #ifndef NO_IMPLICIT_EXTERN_C
952 || (DECL_IN_SYSTEM_HEADER (newdecl) && !DECL_CLASS_SCOPE_P (newdecl))
953 || (DECL_IN_SYSTEM_HEADER (olddecl) && !DECL_CLASS_SCOPE_P (olddecl))
957 types_match = self_promoting_args_p (p1);
958 if (p1 == void_list_node)
959 TREE_TYPE (newdecl) = TREE_TYPE (olddecl);
961 #ifndef NO_IMPLICIT_EXTERN_C
962 else if (p1 == NULL_TREE
963 && (DECL_EXTERN_C_P (olddecl)
964 && DECL_IN_SYSTEM_HEADER (olddecl)
965 && !DECL_CLASS_SCOPE_P (olddecl))
966 && (DECL_EXTERN_C_P (newdecl)
967 && DECL_IN_SYSTEM_HEADER (newdecl)
968 && !DECL_CLASS_SCOPE_P (newdecl)))
970 types_match = self_promoting_args_p (p2);
971 TREE_TYPE (newdecl) = TREE_TYPE (olddecl);
975 types_match = compparms (p1, p2);
980 else if (TREE_CODE (newdecl) == TEMPLATE_DECL)
982 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl))
983 != TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)))
986 if (!comp_template_parms (DECL_TEMPLATE_PARMS (newdecl),
987 DECL_TEMPLATE_PARMS (olddecl)))
990 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
991 types_match = same_type_p (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl)),
992 TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl)));
994 types_match = decls_match (DECL_TEMPLATE_RESULT (olddecl),
995 DECL_TEMPLATE_RESULT (newdecl));
999 /* Need to check scope for variable declaration (VAR_DECL).
1000 For typedef (TYPE_DECL), scope is ignored. */
1001 if (TREE_CODE (newdecl) == VAR_DECL
1002 && CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl)
1004 Two declarations for an object with C language linkage
1005 with the same name (ignoring the namespace that qualify
1006 it) that appear in different namespace scopes refer to
1008 && !(DECL_EXTERN_C_P (olddecl) && DECL_EXTERN_C_P (newdecl)))
1011 if (TREE_TYPE (newdecl) == error_mark_node)
1012 types_match = TREE_TYPE (olddecl) == error_mark_node;
1013 else if (TREE_TYPE (olddecl) == NULL_TREE)
1014 types_match = TREE_TYPE (newdecl) == NULL_TREE;
1015 else if (TREE_TYPE (newdecl) == NULL_TREE)
1018 types_match = comptypes (TREE_TYPE (newdecl),
1019 TREE_TYPE (olddecl),
1020 COMPARE_REDECLARATION);
1026 /* If NEWDECL is `static' and an `extern' was seen previously,
1027 warn about it. OLDDECL is the previous declaration.
1029 Note that this does not apply to the C++ case of declaring
1030 a variable `extern const' and then later `const'.
1032 Don't complain about built-in functions, since they are beyond
1033 the user's control. */
1036 warn_extern_redeclared_static (tree newdecl, tree olddecl)
1040 if (TREE_CODE (newdecl) == TYPE_DECL
1041 || TREE_CODE (newdecl) == TEMPLATE_DECL
1042 || TREE_CODE (newdecl) == CONST_DECL
1043 || TREE_CODE (newdecl) == NAMESPACE_DECL)
1046 /* Don't get confused by static member functions; that's a different
1048 if (TREE_CODE (newdecl) == FUNCTION_DECL
1049 && DECL_STATIC_FUNCTION_P (newdecl))
1052 /* If the old declaration was `static', or the new one isn't, then
1053 then everything is OK. */
1054 if (DECL_THIS_STATIC (olddecl) || !DECL_THIS_STATIC (newdecl))
1057 /* It's OK to declare a builtin function as `static'. */
1058 if (TREE_CODE (olddecl) == FUNCTION_DECL
1059 && DECL_ARTIFICIAL (olddecl))
1062 name = DECL_ASSEMBLER_NAME (newdecl);
1063 pedwarn ("%qD was declared %<extern%> and later %<static%>", newdecl);
1064 pedwarn ("previous declaration of %q+D", olddecl);
1067 /* NEW_DECL is a redeclaration of OLD_DECL; both are functions or
1068 function templates. If their exception specifications do not
1069 match, issue a diagnostic. */
1072 check_redeclaration_exception_specification (tree new_decl,
1077 tree new_exceptions;
1078 tree old_exceptions;
1080 new_type = TREE_TYPE (new_decl);
1081 new_exceptions = TYPE_RAISES_EXCEPTIONS (new_type);
1082 old_type = TREE_TYPE (old_decl);
1083 old_exceptions = TYPE_RAISES_EXCEPTIONS (old_type);
1087 If any declaration of a function has an exception-specification,
1088 all declarations, including the definition and an explicit
1089 specialization, of that function shall have an
1090 exception-specification with the same set of type-ids. */
1091 if ((pedantic || ! DECL_IN_SYSTEM_HEADER (old_decl))
1092 && ! DECL_IS_BUILTIN (old_decl)
1094 && !comp_except_specs (new_exceptions, old_exceptions,
1097 error ("declaration of %qF throws different exceptions", new_decl);
1098 error ("from previous declaration %q+F", old_decl);
1102 /* If NEWDECL is a redeclaration of OLDDECL, merge the declarations.
1103 If the redeclaration is invalid, a diagnostic is issued, and the
1104 error_mark_node is returned. Otherwise, OLDDECL is returned.
1106 If NEWDECL is not a redeclaration of OLDDECL, NULL_TREE is
1109 NEWDECL_IS_FRIEND is true if NEWDECL was declared as a friend. */
1112 duplicate_decls (tree newdecl, tree olddecl, bool newdecl_is_friend)
1114 unsigned olddecl_uid = DECL_UID (olddecl);
1115 int olddecl_friend = 0, types_match = 0, hidden_friend = 0;
1116 int new_defines_function = 0;
1119 if (newdecl == olddecl)
1122 types_match = decls_match (newdecl, olddecl);
1124 /* If either the type of the new decl or the type of the old decl is an
1125 error_mark_node, then that implies that we have already issued an
1126 error (earlier) for some bogus type specification, and in that case,
1127 it is rather pointless to harass the user with yet more error message
1128 about the same declaration, so just pretend the types match here. */
1129 if (TREE_TYPE (newdecl) == error_mark_node
1130 || TREE_TYPE (olddecl) == error_mark_node)
1131 return error_mark_node;
1133 if (DECL_P (olddecl)
1134 && TREE_CODE (newdecl) == FUNCTION_DECL
1135 && TREE_CODE (olddecl) == FUNCTION_DECL
1136 && (DECL_UNINLINABLE (newdecl) || DECL_UNINLINABLE (olddecl)))
1138 if (DECL_DECLARED_INLINE_P (newdecl)
1139 && DECL_UNINLINABLE (newdecl)
1140 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl)))
1141 /* Already warned elsewhere. */;
1142 else if (DECL_DECLARED_INLINE_P (olddecl)
1143 && DECL_UNINLINABLE (olddecl)
1144 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl)))
1145 /* Already warned. */;
1146 else if (DECL_DECLARED_INLINE_P (newdecl)
1147 && DECL_UNINLINABLE (olddecl)
1148 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl)))
1150 warning (OPT_Wattributes, "function %q+D redeclared as inline",
1152 warning (OPT_Wattributes, "previous declaration of %q+D "
1153 "with attribute noinline", olddecl);
1155 else if (DECL_DECLARED_INLINE_P (olddecl)
1156 && DECL_UNINLINABLE (newdecl)
1157 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl)))
1159 warning (OPT_Wattributes, "function %q+D redeclared with "
1160 "attribute noinline", newdecl);
1161 warning (OPT_Wattributes, "previous declaration of %q+D was inline",
1166 /* Check for redeclaration and other discrepancies. */
1167 if (TREE_CODE (olddecl) == FUNCTION_DECL
1168 && DECL_ARTIFICIAL (olddecl))
1170 gcc_assert (!DECL_HIDDEN_FRIEND_P (olddecl));
1171 if (TREE_CODE (newdecl) != FUNCTION_DECL)
1173 /* Avoid warnings redeclaring built-ins which have not been
1174 explicitly declared. */
1175 if (DECL_ANTICIPATED (olddecl))
1178 /* If you declare a built-in or predefined function name as static,
1179 the old definition is overridden, but optionally warn this was a
1180 bad choice of name. */
1181 if (! TREE_PUBLIC (newdecl))
1183 warning (OPT_Wshadow, "shadowing %s function %q#D",
1184 DECL_BUILT_IN (olddecl) ? "built-in" : "library",
1186 /* Discard the old built-in function. */
1189 /* If the built-in is not ansi, then programs can override
1190 it even globally without an error. */
1191 else if (! DECL_BUILT_IN (olddecl))
1192 warning (0, "library function %q#D redeclared as non-function %q#D",
1196 error ("declaration of %q#D", newdecl);
1197 error ("conflicts with built-in declaration %q#D",
1202 else if (!types_match)
1204 /* Avoid warnings redeclaring built-ins which have not been
1205 explicitly declared. */
1206 if (DECL_ANTICIPATED (olddecl))
1208 /* Deal with fileptr_type_node. FILE type is not known
1209 at the time we create the builtins. */
1212 for (t1 = TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1213 t2 = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1215 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2))
1218 else if (TREE_VALUE (t2) == fileptr_type_node)
1220 tree t = TREE_VALUE (t1);
1222 if (TREE_CODE (t) == POINTER_TYPE
1223 && TYPE_NAME (TREE_TYPE (t))
1224 && DECL_NAME (TYPE_NAME (TREE_TYPE (t)))
1225 == get_identifier ("FILE")
1226 && compparms (TREE_CHAIN (t1), TREE_CHAIN (t2)))
1228 tree oldargs = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1230 TYPE_ARG_TYPES (TREE_TYPE (olddecl))
1231 = TYPE_ARG_TYPES (TREE_TYPE (newdecl));
1232 types_match = decls_match (newdecl, olddecl);
1234 return duplicate_decls (newdecl, olddecl,
1236 TYPE_ARG_TYPES (TREE_TYPE (olddecl)) = oldargs;
1239 else if (! same_type_p (TREE_VALUE (t1), TREE_VALUE (t2)))
1242 else if ((DECL_EXTERN_C_P (newdecl)
1243 && DECL_EXTERN_C_P (olddecl))
1244 || compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1245 TYPE_ARG_TYPES (TREE_TYPE (olddecl))))
1247 /* A near match; override the builtin. */
1249 if (TREE_PUBLIC (newdecl))
1251 warning (0, "new declaration %q#D", newdecl);
1252 warning (0, "ambiguates built-in declaration %q#D",
1256 warning (OPT_Wshadow, "shadowing %s function %q#D",
1257 DECL_BUILT_IN (olddecl) ? "built-in" : "library",
1261 /* Discard the old built-in function. */
1264 /* Replace the old RTL to avoid problems with inlining. */
1265 COPY_DECL_RTL (newdecl, olddecl);
1267 /* Even if the types match, prefer the new declarations type for
1268 built-ins which have not been explicitly declared, for
1269 exception lists, etc... */
1270 else if (DECL_ANTICIPATED (olddecl))
1272 tree type = TREE_TYPE (newdecl);
1273 tree attribs = (*targetm.merge_type_attributes)
1274 (TREE_TYPE (olddecl), type);
1276 type = cp_build_type_attribute_variant (type, attribs);
1277 TREE_TYPE (newdecl) = TREE_TYPE (olddecl) = type;
1280 /* Whether or not the builtin can throw exceptions has no
1281 bearing on this declarator. */
1282 TREE_NOTHROW (olddecl) = 0;
1284 if (DECL_THIS_STATIC (newdecl) && !DECL_THIS_STATIC (olddecl))
1286 /* If a builtin function is redeclared as `static', merge
1287 the declarations, but make the original one static. */
1288 DECL_THIS_STATIC (olddecl) = 1;
1289 TREE_PUBLIC (olddecl) = 0;
1291 /* Make the old declaration consistent with the new one so
1292 that all remnants of the builtin-ness of this function
1293 will be banished. */
1294 SET_DECL_LANGUAGE (olddecl, DECL_LANGUAGE (newdecl));
1295 COPY_DECL_RTL (newdecl, olddecl);
1298 else if (TREE_CODE (olddecl) != TREE_CODE (newdecl))
1300 /* C++ Standard, 3.3, clause 4:
1301 "[Note: a namespace name or a class template name must be unique
1302 in its declarative region (7.3.2, clause 14). ]" */
1303 if (TREE_CODE (olddecl) != NAMESPACE_DECL
1304 && TREE_CODE (newdecl) != NAMESPACE_DECL
1305 && (TREE_CODE (olddecl) != TEMPLATE_DECL
1306 || TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) != TYPE_DECL)
1307 && (TREE_CODE (newdecl) != TEMPLATE_DECL
1308 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) != TYPE_DECL))
1310 if ((TREE_CODE (olddecl) == TYPE_DECL && DECL_ARTIFICIAL (olddecl)
1311 && TREE_CODE (newdecl) != TYPE_DECL)
1312 || (TREE_CODE (newdecl) == TYPE_DECL && DECL_ARTIFICIAL (newdecl)
1313 && TREE_CODE (olddecl) != TYPE_DECL))
1315 /* We do nothing special here, because C++ does such nasty
1316 things with TYPE_DECLs. Instead, just let the TYPE_DECL
1317 get shadowed, and know that if we need to find a TYPE_DECL
1318 for a given name, we can look in the IDENTIFIER_TYPE_VALUE
1319 slot of the identifier. */
1323 if ((TREE_CODE (newdecl) == FUNCTION_DECL
1324 && DECL_FUNCTION_TEMPLATE_P (olddecl))
1325 || (TREE_CODE (olddecl) == FUNCTION_DECL
1326 && DECL_FUNCTION_TEMPLATE_P (newdecl)))
1330 error ("%q#D redeclared as different kind of symbol", newdecl);
1331 if (TREE_CODE (olddecl) == TREE_LIST)
1332 olddecl = TREE_VALUE (olddecl);
1333 error ("previous declaration of %q+#D", olddecl);
1335 return error_mark_node;
1337 else if (!types_match)
1339 if (CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl))
1340 /* These are certainly not duplicate declarations; they're
1341 from different scopes. */
1344 if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1346 /* The name of a class template may not be declared to refer to
1347 any other template, class, function, object, namespace, value,
1348 or type in the same scope. */
1349 if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) == TYPE_DECL
1350 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
1352 error ("declaration of template %q#D", newdecl);
1353 error ("conflicts with previous declaration %q+#D", olddecl);
1355 else if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) == FUNCTION_DECL
1356 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == FUNCTION_DECL
1357 && compparms (TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl))),
1358 TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl))))
1359 && comp_template_parms (DECL_TEMPLATE_PARMS (newdecl),
1360 DECL_TEMPLATE_PARMS (olddecl))
1361 /* Template functions can be disambiguated by
1363 && same_type_p (TREE_TYPE (TREE_TYPE (newdecl)),
1364 TREE_TYPE (TREE_TYPE (olddecl))))
1366 error ("new declaration %q#D", newdecl);
1367 error ("ambiguates old declaration %q+#D", olddecl);
1371 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1373 if (DECL_EXTERN_C_P (newdecl) && DECL_EXTERN_C_P (olddecl))
1375 error ("declaration of C function %q#D conflicts with",
1377 error ("previous declaration %q+#D here", olddecl);
1379 else if (compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1380 TYPE_ARG_TYPES (TREE_TYPE (olddecl))))
1382 error ("new declaration %q#D", newdecl);
1383 error ("ambiguates old declaration %q+#D", olddecl);
1384 return error_mark_node;
1391 error ("conflicting declaration %q#D", newdecl);
1392 error ("%q+D has a previous declaration as %q#D", olddecl, olddecl);
1393 return error_mark_node;
1396 else if (TREE_CODE (newdecl) == FUNCTION_DECL
1397 && ((DECL_TEMPLATE_SPECIALIZATION (olddecl)
1398 && (!DECL_TEMPLATE_INFO (newdecl)
1399 || (DECL_TI_TEMPLATE (newdecl)
1400 != DECL_TI_TEMPLATE (olddecl))))
1401 || (DECL_TEMPLATE_SPECIALIZATION (newdecl)
1402 && (!DECL_TEMPLATE_INFO (olddecl)
1403 || (DECL_TI_TEMPLATE (olddecl)
1404 != DECL_TI_TEMPLATE (newdecl))))))
1405 /* It's OK to have a template specialization and a non-template
1406 with the same type, or to have specializations of two
1407 different templates with the same type. Note that if one is a
1408 specialization, and the other is an instantiation of the same
1409 template, that we do not exit at this point. That situation
1410 can occur if we instantiate a template class, and then
1411 specialize one of its methods. This situation is valid, but
1412 the declarations must be merged in the usual way. */
1414 else if (TREE_CODE (newdecl) == FUNCTION_DECL
1415 && ((DECL_TEMPLATE_INSTANTIATION (olddecl)
1416 && !DECL_USE_TEMPLATE (newdecl))
1417 || (DECL_TEMPLATE_INSTANTIATION (newdecl)
1418 && !DECL_USE_TEMPLATE (olddecl))))
1419 /* One of the declarations is a template instantiation, and the
1420 other is not a template at all. That's OK. */
1422 else if (TREE_CODE (newdecl) == NAMESPACE_DECL)
1424 /* In [namespace.alias] we have:
1426 In a declarative region, a namespace-alias-definition can be
1427 used to redefine a namespace-alias declared in that declarative
1428 region to refer only to the namespace to which it already
1431 Therefore, if we encounter a second alias directive for the same
1432 alias, we can just ignore the second directive. */
1433 if (DECL_NAMESPACE_ALIAS (newdecl)
1434 && (DECL_NAMESPACE_ALIAS (newdecl)
1435 == DECL_NAMESPACE_ALIAS (olddecl)))
1437 /* [namespace.alias]
1439 A namespace-name or namespace-alias shall not be declared as
1440 the name of any other entity in the same declarative region.
1441 A namespace-name defined at global scope shall not be
1442 declared as the name of any other entity in any global scope
1444 error ("declaration of namespace %qD conflicts with", newdecl);
1445 error ("previous declaration of namespace %q+D here", olddecl);
1446 return error_mark_node;
1450 const char *errmsg = redeclaration_error_message (newdecl, olddecl);
1453 error (errmsg, newdecl);
1454 if (DECL_NAME (olddecl) != NULL_TREE)
1455 error ((DECL_INITIAL (olddecl) && namespace_bindings_p ())
1456 ? "%q+#D previously defined here"
1457 : "%q+#D previously declared here", olddecl);
1458 return error_mark_node;
1460 else if (TREE_CODE (olddecl) == FUNCTION_DECL
1461 && DECL_INITIAL (olddecl) != NULL_TREE
1462 && TYPE_ARG_TYPES (TREE_TYPE (olddecl)) == NULL_TREE
1463 && TYPE_ARG_TYPES (TREE_TYPE (newdecl)) != NULL_TREE)
1465 /* Prototype decl follows defn w/o prototype. */
1466 warning (0, "prototype for %q+#D", newdecl);
1467 warning (0, "%Jfollows non-prototype definition here", olddecl);
1469 else if ((TREE_CODE (olddecl) == FUNCTION_DECL
1470 || TREE_CODE (olddecl) == VAR_DECL)
1471 && DECL_LANGUAGE (newdecl) != DECL_LANGUAGE (olddecl))
1474 If two declarations of the same function or object
1475 specify different linkage-specifications ..., the program
1476 is ill-formed.... Except for functions with C++ linkage,
1477 a function declaration without a linkage specification
1478 shall not precede the first linkage specification for
1479 that function. A function can be declared without a
1480 linkage specification after an explicit linkage
1481 specification has been seen; the linkage explicitly
1482 specified in the earlier declaration is not affected by
1483 such a function declaration.
1485 DR 563 raises the question why the restrictions on
1486 functions should not also apply to objects. Older
1487 versions of G++ silently ignore the linkage-specification
1495 which is clearly wrong. Therefore, we now treat objects
1497 if (current_lang_depth () == 0)
1499 /* There is no explicit linkage-specification, so we use
1500 the linkage from the previous declaration. */
1501 if (!DECL_LANG_SPECIFIC (newdecl))
1502 retrofit_lang_decl (newdecl);
1503 SET_DECL_LANGUAGE (newdecl, DECL_LANGUAGE (olddecl));
1507 error ("previous declaration of %q+#D with %qL linkage",
1508 olddecl, DECL_LANGUAGE (olddecl));
1509 error ("conflicts with new declaration with %qL linkage",
1510 DECL_LANGUAGE (newdecl));
1514 if (DECL_LANG_SPECIFIC (olddecl) && DECL_USE_TEMPLATE (olddecl))
1516 else if (TREE_CODE (olddecl) == FUNCTION_DECL)
1518 tree t1 = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1519 tree t2 = TYPE_ARG_TYPES (TREE_TYPE (newdecl));
1522 if (TREE_CODE (TREE_TYPE (newdecl)) == METHOD_TYPE)
1523 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2);
1525 for (; t1 && t1 != void_list_node;
1526 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2), i++)
1527 if (TREE_PURPOSE (t1) && TREE_PURPOSE (t2))
1529 if (1 == simple_cst_equal (TREE_PURPOSE (t1),
1532 pedwarn ("default argument given for parameter %d of %q#D",
1534 pedwarn ("after previous specification in %q+#D", olddecl);
1538 error ("default argument given for parameter %d of %q#D",
1540 error ("after previous specification in %q+#D",
1545 if (DECL_DECLARED_INLINE_P (newdecl)
1546 && ! DECL_DECLARED_INLINE_P (olddecl)
1547 && TREE_ADDRESSABLE (olddecl) && warn_inline)
1549 warning (0, "%q#D was used before it was declared inline", newdecl);
1550 warning (0, "%Jprevious non-inline declaration here", olddecl);
1555 /* Do not merge an implicit typedef with an explicit one. In:
1559 typedef class A A __attribute__ ((foo));
1561 the attribute should apply only to the typedef. */
1562 if (TREE_CODE (olddecl) == TYPE_DECL
1563 && (DECL_IMPLICIT_TYPEDEF_P (olddecl)
1564 || DECL_IMPLICIT_TYPEDEF_P (newdecl)))
1567 /* If new decl is `static' and an `extern' was seen previously,
1569 warn_extern_redeclared_static (newdecl, olddecl);
1571 /* We have committed to returning 1 at this point. */
1572 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1574 /* Now that functions must hold information normally held
1575 by field decls, there is extra work to do so that
1576 declaration information does not get destroyed during
1578 if (DECL_VINDEX (olddecl))
1579 DECL_VINDEX (newdecl) = DECL_VINDEX (olddecl);
1580 if (DECL_CONTEXT (olddecl))
1581 DECL_CONTEXT (newdecl) = DECL_CONTEXT (olddecl);
1582 DECL_STATIC_CONSTRUCTOR (newdecl) |= DECL_STATIC_CONSTRUCTOR (olddecl);
1583 DECL_STATIC_DESTRUCTOR (newdecl) |= DECL_STATIC_DESTRUCTOR (olddecl);
1584 DECL_PURE_VIRTUAL_P (newdecl) |= DECL_PURE_VIRTUAL_P (olddecl);
1585 DECL_VIRTUAL_P (newdecl) |= DECL_VIRTUAL_P (olddecl);
1586 DECL_INVALID_OVERRIDER_P (newdecl) |= DECL_INVALID_OVERRIDER_P (olddecl);
1587 DECL_THIS_STATIC (newdecl) |= DECL_THIS_STATIC (olddecl);
1588 if (DECL_OVERLOADED_OPERATOR_P (olddecl) != ERROR_MARK)
1589 SET_OVERLOADED_OPERATOR_CODE
1590 (newdecl, DECL_OVERLOADED_OPERATOR_P (olddecl));
1591 new_defines_function = DECL_INITIAL (newdecl) != NULL_TREE;
1593 /* Optionally warn about more than one declaration for the same
1594 name, but don't warn about a function declaration followed by a
1596 if (warn_redundant_decls && ! DECL_ARTIFICIAL (olddecl)
1597 && !(new_defines_function && DECL_INITIAL (olddecl) == NULL_TREE)
1598 /* Don't warn about extern decl followed by definition. */
1599 && !(DECL_EXTERNAL (olddecl) && ! DECL_EXTERNAL (newdecl))
1600 /* Don't warn about friends, let add_friend take care of it. */
1601 && ! (newdecl_is_friend || DECL_FRIEND_P (olddecl)))
1603 warning (OPT_Wredundant_decls, "redundant redeclaration of %qD in same scope", newdecl);
1604 warning (OPT_Wredundant_decls, "previous declaration of %q+D", olddecl);
1608 /* Deal with C++: must preserve virtual function table size. */
1609 if (TREE_CODE (olddecl) == TYPE_DECL)
1611 tree newtype = TREE_TYPE (newdecl);
1612 tree oldtype = TREE_TYPE (olddecl);
1614 if (newtype != error_mark_node && oldtype != error_mark_node
1615 && TYPE_LANG_SPECIFIC (newtype) && TYPE_LANG_SPECIFIC (oldtype))
1616 CLASSTYPE_FRIEND_CLASSES (newtype)
1617 = CLASSTYPE_FRIEND_CLASSES (oldtype);
1619 DECL_ORIGINAL_TYPE (newdecl) = DECL_ORIGINAL_TYPE (olddecl);
1622 /* Copy all the DECL_... slots specified in the new decl
1623 except for any that we copy here from the old type. */
1624 DECL_ATTRIBUTES (newdecl)
1625 = (*targetm.merge_decl_attributes) (olddecl, newdecl);
1627 if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1631 old_result = DECL_TEMPLATE_RESULT (olddecl);
1632 new_result = DECL_TEMPLATE_RESULT (newdecl);
1633 TREE_TYPE (olddecl) = TREE_TYPE (old_result);
1634 DECL_TEMPLATE_SPECIALIZATIONS (olddecl)
1635 = chainon (DECL_TEMPLATE_SPECIALIZATIONS (olddecl),
1636 DECL_TEMPLATE_SPECIALIZATIONS (newdecl));
1638 if (DECL_FUNCTION_TEMPLATE_P (newdecl))
1640 DECL_INLINE (old_result)
1641 |= DECL_INLINE (new_result);
1642 DECL_DECLARED_INLINE_P (old_result)
1643 |= DECL_DECLARED_INLINE_P (new_result);
1644 check_redeclaration_exception_specification (newdecl, olddecl);
1647 /* If the new declaration is a definition, update the file and
1648 line information on the declaration, and also make
1649 the old declaration the same definition. */
1650 if (DECL_INITIAL (old_result) == NULL_TREE
1651 && DECL_INITIAL (new_result) != NULL_TREE)
1653 DECL_SOURCE_LOCATION (olddecl)
1654 = DECL_SOURCE_LOCATION (old_result)
1655 = DECL_SOURCE_LOCATION (newdecl);
1656 DECL_INITIAL (old_result) = DECL_INITIAL (new_result);
1657 if (DECL_FUNCTION_TEMPLATE_P (newdecl))
1658 DECL_ARGUMENTS (old_result)
1659 = DECL_ARGUMENTS (new_result);
1667 /* Automatically handles default parameters. */
1668 tree oldtype = TREE_TYPE (olddecl);
1671 /* Merge the data types specified in the two decls. */
1672 newtype = merge_types (TREE_TYPE (newdecl), TREE_TYPE (olddecl));
1674 /* If merge_types produces a non-typedef type, just use the old type. */
1675 if (TREE_CODE (newdecl) == TYPE_DECL
1676 && newtype == DECL_ORIGINAL_TYPE (newdecl))
1679 if (TREE_CODE (newdecl) == VAR_DECL)
1681 DECL_THIS_EXTERN (newdecl) |= DECL_THIS_EXTERN (olddecl);
1682 DECL_INITIALIZED_P (newdecl) |= DECL_INITIALIZED_P (olddecl);
1683 DECL_NONTRIVIALLY_INITIALIZED_P (newdecl)
1684 |= DECL_NONTRIVIALLY_INITIALIZED_P (olddecl);
1685 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (newdecl)
1686 |= DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (olddecl);
1688 /* Merge the threadprivate attribute from OLDDECL into NEWDECL. */
1689 if (DECL_LANG_SPECIFIC (olddecl)
1690 && CP_DECL_THREADPRIVATE_P (olddecl))
1692 /* Allocate a LANG_SPECIFIC structure for NEWDECL, if needed. */
1693 if (!DECL_LANG_SPECIFIC (newdecl))
1694 retrofit_lang_decl (newdecl);
1696 DECL_TLS_MODEL (newdecl) = DECL_TLS_MODEL (olddecl);
1697 CP_DECL_THREADPRIVATE_P (newdecl) = 1;
1701 /* Do this after calling `merge_types' so that default
1702 parameters don't confuse us. */
1703 else if (TREE_CODE (newdecl) == FUNCTION_DECL)
1704 check_redeclaration_exception_specification (newdecl, olddecl);
1705 TREE_TYPE (newdecl) = TREE_TYPE (olddecl) = newtype;
1707 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1708 check_default_args (newdecl);
1710 /* Lay the type out, unless already done. */
1711 if (! same_type_p (newtype, oldtype)
1712 && TREE_TYPE (newdecl) != error_mark_node
1713 && !(processing_template_decl && uses_template_parms (newdecl)))
1714 layout_type (TREE_TYPE (newdecl));
1716 if ((TREE_CODE (newdecl) == VAR_DECL
1717 || TREE_CODE (newdecl) == PARM_DECL
1718 || TREE_CODE (newdecl) == RESULT_DECL
1719 || TREE_CODE (newdecl) == FIELD_DECL
1720 || TREE_CODE (newdecl) == TYPE_DECL)
1721 && !(processing_template_decl && uses_template_parms (newdecl)))
1722 layout_decl (newdecl, 0);
1724 /* Merge the type qualifiers. */
1725 if (TREE_READONLY (newdecl))
1726 TREE_READONLY (olddecl) = 1;
1727 if (TREE_THIS_VOLATILE (newdecl))
1728 TREE_THIS_VOLATILE (olddecl) = 1;
1729 if (TREE_NOTHROW (newdecl))
1730 TREE_NOTHROW (olddecl) = 1;
1732 /* Merge deprecatedness. */
1733 if (TREE_DEPRECATED (newdecl))
1734 TREE_DEPRECATED (olddecl) = 1;
1736 /* Merge the initialization information. */
1737 if (DECL_INITIAL (newdecl) == NULL_TREE
1738 && DECL_INITIAL (olddecl) != NULL_TREE)
1740 DECL_INITIAL (newdecl) = DECL_INITIAL (olddecl);
1741 DECL_SOURCE_LOCATION (newdecl) = DECL_SOURCE_LOCATION (olddecl);
1742 if (CAN_HAVE_FULL_LANG_DECL_P (newdecl)
1743 && DECL_LANG_SPECIFIC (newdecl)
1744 && DECL_LANG_SPECIFIC (olddecl))
1746 DECL_SAVED_TREE (newdecl) = DECL_SAVED_TREE (olddecl);
1747 DECL_STRUCT_FUNCTION (newdecl) = DECL_STRUCT_FUNCTION (olddecl);
1751 /* Merge the section attribute.
1752 We want to issue an error if the sections conflict but that must be
1753 done later in decl_attributes since we are called before attributes
1755 if (DECL_SECTION_NAME (newdecl) == NULL_TREE)
1756 DECL_SECTION_NAME (newdecl) = DECL_SECTION_NAME (olddecl);
1758 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1760 DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (newdecl)
1761 |= DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (olddecl);
1762 DECL_NO_LIMIT_STACK (newdecl) |= DECL_NO_LIMIT_STACK (olddecl);
1763 TREE_THIS_VOLATILE (newdecl) |= TREE_THIS_VOLATILE (olddecl);
1764 TREE_READONLY (newdecl) |= TREE_READONLY (olddecl);
1765 TREE_NOTHROW (newdecl) |= TREE_NOTHROW (olddecl);
1766 DECL_IS_MALLOC (newdecl) |= DECL_IS_MALLOC (olddecl);
1767 DECL_IS_PURE (newdecl) |= DECL_IS_PURE (olddecl);
1768 /* Keep the old RTL. */
1769 COPY_DECL_RTL (olddecl, newdecl);
1771 else if (TREE_CODE (newdecl) == VAR_DECL
1772 && (DECL_SIZE (olddecl) || !DECL_SIZE (newdecl)))
1774 /* Keep the old RTL. We cannot keep the old RTL if the old
1775 declaration was for an incomplete object and the new
1776 declaration is not since many attributes of the RTL will
1778 COPY_DECL_RTL (olddecl, newdecl);
1781 /* If cannot merge, then use the new type and qualifiers,
1782 and don't preserve the old rtl. */
1785 /* Clean out any memory we had of the old declaration. */
1786 tree oldstatic = value_member (olddecl, static_aggregates);
1788 TREE_VALUE (oldstatic) = error_mark_node;
1790 TREE_TYPE (olddecl) = TREE_TYPE (newdecl);
1791 TREE_READONLY (olddecl) = TREE_READONLY (newdecl);
1792 TREE_THIS_VOLATILE (olddecl) = TREE_THIS_VOLATILE (newdecl);
1793 TREE_SIDE_EFFECTS (olddecl) = TREE_SIDE_EFFECTS (newdecl);
1796 /* Merge the storage class information. */
1797 merge_weak (newdecl, olddecl);
1799 DECL_ONE_ONLY (newdecl) |= DECL_ONE_ONLY (olddecl);
1800 DECL_DEFER_OUTPUT (newdecl) |= DECL_DEFER_OUTPUT (olddecl);
1801 TREE_PUBLIC (newdecl) = TREE_PUBLIC (olddecl);
1802 TREE_STATIC (olddecl) = TREE_STATIC (newdecl) |= TREE_STATIC (olddecl);
1803 if (! DECL_EXTERNAL (olddecl))
1804 DECL_EXTERNAL (newdecl) = 0;
1806 new_template = NULL_TREE;
1807 if (DECL_LANG_SPECIFIC (newdecl) && DECL_LANG_SPECIFIC (olddecl))
1809 DECL_INTERFACE_KNOWN (newdecl) |= DECL_INTERFACE_KNOWN (olddecl);
1810 DECL_NOT_REALLY_EXTERN (newdecl) |= DECL_NOT_REALLY_EXTERN (olddecl);
1811 DECL_COMDAT (newdecl) |= DECL_COMDAT (olddecl);
1812 DECL_TEMPLATE_INSTANTIATED (newdecl)
1813 |= DECL_TEMPLATE_INSTANTIATED (olddecl);
1815 /* If the OLDDECL is an instantiation and/or specialization,
1816 then the NEWDECL must be too. But, it may not yet be marked
1817 as such if the caller has created NEWDECL, but has not yet
1818 figured out that it is a redeclaration. */
1819 if (!DECL_USE_TEMPLATE (newdecl))
1820 DECL_USE_TEMPLATE (newdecl) = DECL_USE_TEMPLATE (olddecl);
1822 /* Don't really know how much of the language-specific
1823 values we should copy from old to new. */
1824 DECL_IN_AGGR_P (newdecl) = DECL_IN_AGGR_P (olddecl);
1825 DECL_LANG_SPECIFIC (newdecl)->decl_flags.u2 =
1826 DECL_LANG_SPECIFIC (olddecl)->decl_flags.u2;
1827 DECL_NONCONVERTING_P (newdecl) = DECL_NONCONVERTING_P (olddecl);
1828 DECL_REPO_AVAILABLE_P (newdecl) = DECL_REPO_AVAILABLE_P (olddecl);
1829 if (DECL_TEMPLATE_INFO (newdecl))
1830 new_template = DECL_TI_TEMPLATE (newdecl);
1831 DECL_TEMPLATE_INFO (newdecl) = DECL_TEMPLATE_INFO (olddecl);
1832 DECL_INITIALIZED_IN_CLASS_P (newdecl)
1833 |= DECL_INITIALIZED_IN_CLASS_P (olddecl);
1834 olddecl_friend = DECL_FRIEND_P (olddecl);
1835 hidden_friend = (DECL_ANTICIPATED (olddecl)
1836 && DECL_HIDDEN_FRIEND_P (olddecl)
1837 && newdecl_is_friend);
1839 /* Only functions have DECL_BEFRIENDING_CLASSES. */
1840 if (TREE_CODE (newdecl) == FUNCTION_DECL
1841 || DECL_FUNCTION_TEMPLATE_P (newdecl))
1843 DECL_BEFRIENDING_CLASSES (newdecl)
1844 = chainon (DECL_BEFRIENDING_CLASSES (newdecl),
1845 DECL_BEFRIENDING_CLASSES (olddecl));
1846 /* DECL_THUNKS is only valid for virtual functions,
1847 otherwise it is a DECL_FRIEND_CONTEXT. */
1848 if (DECL_VIRTUAL_P (newdecl))
1849 DECL_THUNKS (newdecl) = DECL_THUNKS (olddecl);
1853 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1855 if (DECL_TEMPLATE_INSTANTIATION (olddecl)
1856 && !DECL_TEMPLATE_INSTANTIATION (newdecl))
1858 /* If newdecl is not a specialization, then it is not a
1859 template-related function at all. And that means that we
1860 should have exited above, returning 0. */
1861 gcc_assert (DECL_TEMPLATE_SPECIALIZATION (newdecl));
1863 if (TREE_USED (olddecl))
1864 /* From [temp.expl.spec]:
1866 If a template, a member template or the member of a class
1867 template is explicitly specialized then that
1868 specialization shall be declared before the first use of
1869 that specialization that would cause an implicit
1870 instantiation to take place, in every translation unit in
1871 which such a use occurs. */
1872 error ("explicit specialization of %qD after first use",
1875 SET_DECL_TEMPLATE_SPECIALIZATION (olddecl);
1877 /* Don't propagate visibility from the template to the
1878 specialization here. We'll do that in determine_visibility if
1880 DECL_VISIBILITY_SPECIFIED (olddecl) = 0;
1882 /* [temp.expl.spec/14] We don't inline explicit specialization
1883 just because the primary template says so. */
1887 if (DECL_PENDING_INLINE_INFO (newdecl) == 0)
1888 DECL_PENDING_INLINE_INFO (newdecl) = DECL_PENDING_INLINE_INFO (olddecl);
1890 DECL_DECLARED_INLINE_P (newdecl) |= DECL_DECLARED_INLINE_P (olddecl);
1892 /* If either decl says `inline', this fn is inline, unless
1893 its definition was passed already. */
1894 if (DECL_INLINE (newdecl) && DECL_INITIAL (olddecl) == NULL_TREE)
1895 DECL_INLINE (olddecl) = 1;
1896 DECL_INLINE (newdecl) = DECL_INLINE (olddecl);
1898 DECL_UNINLINABLE (newdecl) = DECL_UNINLINABLE (olddecl)
1899 = (DECL_UNINLINABLE (newdecl) || DECL_UNINLINABLE (olddecl));
1902 /* Preserve abstractness on cloned [cd]tors. */
1903 DECL_ABSTRACT (newdecl) = DECL_ABSTRACT (olddecl);
1907 SET_DECL_LANGUAGE (olddecl, DECL_LANGUAGE (newdecl));
1908 COPY_DECL_ASSEMBLER_NAME (newdecl, olddecl);
1909 COPY_DECL_RTL (newdecl, olddecl);
1911 if (! types_match || new_defines_function)
1913 /* These need to be copied so that the names are available.
1914 Note that if the types do match, we'll preserve inline
1915 info and other bits, but if not, we won't. */
1916 DECL_ARGUMENTS (olddecl) = DECL_ARGUMENTS (newdecl);
1917 DECL_RESULT (olddecl) = DECL_RESULT (newdecl);
1919 if (new_defines_function)
1920 /* If defining a function declared with other language
1921 linkage, use the previously declared language linkage. */
1922 SET_DECL_LANGUAGE (newdecl, DECL_LANGUAGE (olddecl));
1923 else if (types_match)
1925 /* If redeclaring a builtin function, and not a definition,
1926 it stays built in. */
1927 if (DECL_BUILT_IN (olddecl))
1929 DECL_BUILT_IN_CLASS (newdecl) = DECL_BUILT_IN_CLASS (olddecl);
1930 DECL_FUNCTION_CODE (newdecl) = DECL_FUNCTION_CODE (olddecl);
1931 /* If we're keeping the built-in definition, keep the rtl,
1932 regardless of declaration matches. */
1933 COPY_DECL_RTL (olddecl, newdecl);
1936 DECL_RESULT (newdecl) = DECL_RESULT (olddecl);
1937 /* Don't clear out the arguments if we're redefining a function. */
1938 if (DECL_ARGUMENTS (olddecl))
1939 DECL_ARGUMENTS (newdecl) = DECL_ARGUMENTS (olddecl);
1942 else if (TREE_CODE (newdecl) == NAMESPACE_DECL)
1943 NAMESPACE_LEVEL (newdecl) = NAMESPACE_LEVEL (olddecl);
1945 /* Now preserve various other info from the definition. */
1946 TREE_ADDRESSABLE (newdecl) = TREE_ADDRESSABLE (olddecl);
1947 TREE_ASM_WRITTEN (newdecl) = TREE_ASM_WRITTEN (olddecl);
1948 DECL_COMMON (newdecl) = DECL_COMMON (olddecl);
1949 COPY_DECL_ASSEMBLER_NAME (olddecl, newdecl);
1951 /* Warn about conflicting visibility specifications. */
1952 if (DECL_VISIBILITY_SPECIFIED (olddecl)
1953 && DECL_VISIBILITY_SPECIFIED (newdecl)
1954 && DECL_VISIBILITY (newdecl) != DECL_VISIBILITY (olddecl))
1956 warning (OPT_Wattributes, "%q+D: visibility attribute ignored "
1957 "because it", newdecl);
1958 warning (OPT_Wattributes, "%Jconflicts with previous "
1959 "declaration here", olddecl);
1961 /* Choose the declaration which specified visibility. */
1962 if (DECL_VISIBILITY_SPECIFIED (olddecl))
1964 DECL_VISIBILITY (newdecl) = DECL_VISIBILITY (olddecl);
1965 DECL_VISIBILITY_SPECIFIED (newdecl) = 1;
1967 /* Init priority used to be merged from newdecl to olddecl by the memcpy,
1968 so keep this behavior. */
1969 if (TREE_CODE (newdecl) == VAR_DECL && DECL_HAS_INIT_PRIORITY_P (newdecl))
1971 SET_DECL_INIT_PRIORITY (olddecl, DECL_INIT_PRIORITY (newdecl));
1972 DECL_HAS_INIT_PRIORITY_P (olddecl) = 1;
1975 /* The DECL_LANG_SPECIFIC information in OLDDECL will be replaced
1976 with that from NEWDECL below. */
1977 if (DECL_LANG_SPECIFIC (olddecl))
1979 gcc_assert (DECL_LANG_SPECIFIC (olddecl)
1980 != DECL_LANG_SPECIFIC (newdecl));
1981 ggc_free (DECL_LANG_SPECIFIC (olddecl));
1984 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1988 function_size = sizeof (struct tree_decl_common);
1990 memcpy ((char *) olddecl + sizeof (struct tree_common),
1991 (char *) newdecl + sizeof (struct tree_common),
1992 function_size - sizeof (struct tree_common));
1994 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
1995 (char *) newdecl + sizeof (struct tree_decl_common),
1996 sizeof (struct tree_function_decl) - sizeof (struct tree_decl_common));
1998 /* If newdecl is a template instantiation, it is possible that
1999 the following sequence of events has occurred:
2001 o A friend function was declared in a class template. The
2002 class template was instantiated.
2004 o The instantiation of the friend declaration was
2005 recorded on the instantiation list, and is newdecl.
2007 o Later, however, instantiate_class_template called pushdecl
2008 on the newdecl to perform name injection. But, pushdecl in
2009 turn called duplicate_decls when it discovered that another
2010 declaration of a global function with the same name already
2013 o Here, in duplicate_decls, we decided to clobber newdecl.
2015 If we're going to do that, we'd better make sure that
2016 olddecl, and not newdecl, is on the list of
2017 instantiations so that if we try to do the instantiation
2018 again we won't get the clobbered declaration. */
2019 reregister_specialization (newdecl,
2025 size_t size = tree_code_size (TREE_CODE (olddecl));
2026 memcpy ((char *) olddecl + sizeof (struct tree_common),
2027 (char *) newdecl + sizeof (struct tree_common),
2028 sizeof (struct tree_decl_common) - sizeof (struct tree_common));
2029 switch (TREE_CODE (olddecl))
2039 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
2040 (char *) newdecl + sizeof (struct tree_decl_common),
2041 size - sizeof (struct tree_decl_common)
2042 + TREE_CODE_LENGTH (TREE_CODE (newdecl)) * sizeof (char *));
2046 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
2047 (char *) newdecl + sizeof (struct tree_decl_common),
2048 sizeof (struct tree_decl_non_common) - sizeof (struct tree_decl_common)
2049 + TREE_CODE_LENGTH (TREE_CODE (newdecl)) * sizeof (char *));
2053 DECL_UID (olddecl) = olddecl_uid;
2055 DECL_FRIEND_P (olddecl) = 1;
2058 DECL_ANTICIPATED (olddecl) = 1;
2059 DECL_HIDDEN_FRIEND_P (olddecl) = 1;
2062 /* NEWDECL contains the merged attribute lists.
2063 Update OLDDECL to be the same. */
2064 DECL_ATTRIBUTES (olddecl) = DECL_ATTRIBUTES (newdecl);
2066 /* If OLDDECL had its DECL_RTL instantiated, re-invoke make_decl_rtl
2067 so that encode_section_info has a chance to look at the new decl
2068 flags and attributes. */
2069 if (DECL_RTL_SET_P (olddecl)
2070 && (TREE_CODE (olddecl) == FUNCTION_DECL
2071 || (TREE_CODE (olddecl) == VAR_DECL
2072 && TREE_STATIC (olddecl))))
2073 make_decl_rtl (olddecl);
2075 /* The NEWDECL will no longer be needed. Because every out-of-class
2076 declaration of a member results in a call to duplicate_decls,
2077 freeing these nodes represents in a significant savings. */
2083 /* Return zero if the declaration NEWDECL is valid
2084 when the declaration OLDDECL (assumed to be for the same name)
2085 has already been seen.
2086 Otherwise return an error message format string with a %s
2087 where the identifier should go. */
2090 redeclaration_error_message (tree newdecl, tree olddecl)
2092 if (TREE_CODE (newdecl) == TYPE_DECL)
2094 /* Because C++ can put things into name space for free,
2095 constructs like "typedef struct foo { ... } foo"
2096 would look like an erroneous redeclaration. */
2097 if (same_type_p (TREE_TYPE (newdecl), TREE_TYPE (olddecl)))
2100 return "redefinition of %q#D";
2102 else if (TREE_CODE (newdecl) == FUNCTION_DECL)
2104 /* If this is a pure function, its olddecl will actually be
2105 the original initialization to `0' (which we force to call
2106 abort()). Don't complain about redefinition in this case. */
2107 if (DECL_LANG_SPECIFIC (olddecl) && DECL_PURE_VIRTUAL_P (olddecl)
2108 && DECL_INITIAL (olddecl) == NULL_TREE)
2111 /* If both functions come from different namespaces, this is not
2112 a redeclaration - this is a conflict with a used function. */
2113 if (DECL_NAMESPACE_SCOPE_P (olddecl)
2114 && DECL_CONTEXT (olddecl) != DECL_CONTEXT (newdecl)
2115 && ! decls_match (olddecl, newdecl))
2116 return "%qD conflicts with used function";
2118 /* We'll complain about linkage mismatches in
2119 warn_extern_redeclared_static. */
2121 /* Defining the same name twice is no good. */
2122 if (DECL_INITIAL (olddecl) != NULL_TREE
2123 && DECL_INITIAL (newdecl) != NULL_TREE)
2125 if (DECL_NAME (olddecl) == NULL_TREE)
2126 return "%q#D not declared in class";
2128 return "redefinition of %q#D";
2132 else if (TREE_CODE (newdecl) == TEMPLATE_DECL)
2136 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
2138 if (COMPLETE_TYPE_P (TREE_TYPE (newdecl))
2139 && COMPLETE_TYPE_P (TREE_TYPE (olddecl)))
2140 return "redefinition of %q#D";
2144 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) != FUNCTION_DECL
2145 || (DECL_TEMPLATE_RESULT (newdecl)
2146 == DECL_TEMPLATE_RESULT (olddecl)))
2149 nt = DECL_TEMPLATE_RESULT (newdecl);
2150 if (DECL_TEMPLATE_INFO (nt))
2151 nt = DECL_TEMPLATE_RESULT (template_for_substitution (nt));
2152 ot = DECL_TEMPLATE_RESULT (olddecl);
2153 if (DECL_TEMPLATE_INFO (ot))
2154 ot = DECL_TEMPLATE_RESULT (template_for_substitution (ot));
2155 if (DECL_INITIAL (nt) && DECL_INITIAL (ot))
2156 return "redefinition of %q#D";
2158 /* Core issue #226 (C++0x):
2160 If a friend function template declaration specifies a
2161 default template-argument, that declaration shall be a
2162 definition and shall be the only declaration of the
2163 function template in the translation unit. */
2165 && TREE_CODE (ot) == FUNCTION_DECL && DECL_FRIEND_P (ot)
2166 && !check_default_tmpl_args (nt, DECL_TEMPLATE_PARMS (newdecl),
2167 /*is_primary=*/1, /*is_partial=*/0,
2168 /*is_friend_decl=*/2))
2169 return "redeclaration of friend %q#D may not have default template arguments";
2173 else if (TREE_CODE (newdecl) == VAR_DECL
2174 && DECL_THREAD_LOCAL_P (newdecl) != DECL_THREAD_LOCAL_P (olddecl)
2175 && (! DECL_LANG_SPECIFIC (olddecl)
2176 || ! CP_DECL_THREADPRIVATE_P (olddecl)
2177 || DECL_THREAD_LOCAL_P (newdecl)))
2179 /* Only variables can be thread-local, and all declarations must
2180 agree on this property. */
2181 if (DECL_THREAD_LOCAL_P (newdecl))
2182 return "thread-local declaration of %q#D follows "
2183 "non-thread-local declaration";
2185 return "non-thread-local declaration of %q#D follows "
2186 "thread-local declaration";
2188 else if (toplevel_bindings_p () || DECL_NAMESPACE_SCOPE_P (newdecl))
2190 /* Objects declared at top level: */
2191 /* If at least one is a reference, it's ok. */
2192 if (DECL_EXTERNAL (newdecl) || DECL_EXTERNAL (olddecl))
2194 /* Reject two definitions. */
2195 return "redefinition of %q#D";
2199 /* Objects declared with block scope: */
2200 /* Reject two definitions, and reject a definition
2201 together with an external reference. */
2202 if (!(DECL_EXTERNAL (newdecl) && DECL_EXTERNAL (olddecl)))
2203 return "redeclaration of %q#D";
2208 /* Hash and equality functions for the named_label table. */
2211 named_label_entry_hash (const void *data)
2213 const struct named_label_entry *ent = (const struct named_label_entry *) data;
2214 return DECL_UID (ent->label_decl);
2218 named_label_entry_eq (const void *a, const void *b)
2220 const struct named_label_entry *ent_a = (const struct named_label_entry *) a;
2221 const struct named_label_entry *ent_b = (const struct named_label_entry *) b;
2222 return ent_a->label_decl == ent_b->label_decl;
2225 /* Create a new label, named ID. */
2228 make_label_decl (tree id, int local_p)
2230 struct named_label_entry *ent;
2234 decl = build_decl (LABEL_DECL, id, void_type_node);
2236 DECL_CONTEXT (decl) = current_function_decl;
2237 DECL_MODE (decl) = VOIDmode;
2238 C_DECLARED_LABEL_FLAG (decl) = local_p;
2240 /* Say where one reference is to the label, for the sake of the
2241 error if it is not defined. */
2242 DECL_SOURCE_LOCATION (decl) = input_location;
2244 /* Record the fact that this identifier is bound to this label. */
2245 SET_IDENTIFIER_LABEL_VALUE (id, decl);
2247 /* Create the label htab for the function on demand. */
2249 named_labels = htab_create_ggc (13, named_label_entry_hash,
2250 named_label_entry_eq, NULL);
2252 /* Record this label on the list of labels used in this function.
2253 We do this before calling make_label_decl so that we get the
2254 IDENTIFIER_LABEL_VALUE before the new label is declared. */
2255 ent = GGC_CNEW (struct named_label_entry);
2256 ent->label_decl = decl;
2258 slot = htab_find_slot (named_labels, ent, INSERT);
2259 gcc_assert (*slot == NULL);
2265 /* Look for a label named ID in the current function. If one cannot
2266 be found, create one. (We keep track of used, but undefined,
2267 labels, and complain about them at the end of a function.) */
2270 lookup_label (tree id)
2274 timevar_push (TV_NAME_LOOKUP);
2275 /* You can't use labels at global scope. */
2276 if (current_function_decl == NULL_TREE)
2278 error ("label %qE referenced outside of any function", id);
2279 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, NULL_TREE);
2282 /* See if we've already got this label. */
2283 decl = IDENTIFIER_LABEL_VALUE (id);
2284 if (decl != NULL_TREE && DECL_CONTEXT (decl) == current_function_decl)
2285 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2287 decl = make_label_decl (id, /*local_p=*/0);
2288 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2291 /* Declare a local label named ID. */
2294 declare_local_label (tree id)
2298 /* Add a new entry to the SHADOWED_LABELS list so that when we leave
2299 this scope we can restore the old value of IDENTIFIER_TYPE_VALUE. */
2300 shadow = tree_cons (IDENTIFIER_LABEL_VALUE (id), NULL_TREE,
2301 current_binding_level->shadowed_labels);
2302 current_binding_level->shadowed_labels = shadow;
2304 decl = make_label_decl (id, /*local_p=*/1);
2305 TREE_VALUE (shadow) = decl;
2310 /* Returns nonzero if it is ill-formed to jump past the declaration of
2311 DECL. Returns 2 if it's also a real problem. */
2314 decl_jump_unsafe (tree decl)
2316 if (TREE_CODE (decl) != VAR_DECL || TREE_STATIC (decl)
2317 || TREE_TYPE (decl) == error_mark_node)
2320 if (TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl))
2321 || DECL_NONTRIVIALLY_INITIALIZED_P (decl))
2324 if (pod_type_p (TREE_TYPE (decl)))
2327 /* The POD stuff is just pedantry; why should it matter if the class
2328 contains a field of pointer to member type? */
2332 /* A subroutine of check_previous_goto_1 to identify a branch to the user. */
2335 identify_goto (tree decl, const location_t *locus)
2338 pedwarn ("jump to label %qD", decl);
2340 pedwarn ("jump to case label");
2342 pedwarn ("%H from here", locus);
2345 /* Check that a single previously seen jump to a newly defined label
2346 is OK. DECL is the LABEL_DECL or 0; LEVEL is the binding_level for
2347 the jump context; NAMES are the names in scope in LEVEL at the jump
2348 context; LOCUS is the source position of the jump or 0. Returns
2349 true if all is well. */
2352 check_previous_goto_1 (tree decl, struct cp_binding_level* level, tree names,
2353 bool exited_omp, const location_t *locus)
2355 struct cp_binding_level *b;
2356 bool identified = false, saw_eh = false, saw_omp = false;
2360 identify_goto (decl, locus);
2361 error (" exits OpenMP structured block");
2362 identified = saw_omp = true;
2365 for (b = current_binding_level; b ; b = b->level_chain)
2367 tree new_decls, old_decls = (b == level ? names : NULL_TREE);
2369 for (new_decls = b->names; new_decls != old_decls;
2370 new_decls = TREE_CHAIN (new_decls))
2372 int problem = decl_jump_unsafe (new_decls);
2378 identify_goto (decl, locus);
2382 error (" crosses initialization of %q+#D", new_decls);
2384 pedwarn (" enters scope of non-POD %q+#D", new_decls);
2389 if ((b->kind == sk_try || b->kind == sk_catch) && !saw_eh)
2393 identify_goto (decl, locus);
2396 if (b->kind == sk_try)
2397 error (" enters try block");
2399 error (" enters catch block");
2402 if (b->kind == sk_omp && !saw_omp)
2406 identify_goto (decl, locus);
2409 error (" enters OpenMP structured block");
2418 check_previous_goto (tree decl, struct named_label_use_entry *use)
2420 check_previous_goto_1 (decl, use->binding_level,
2421 use->names_in_scope, use->in_omp_scope,
2422 &use->o_goto_locus);
2426 check_switch_goto (struct cp_binding_level* level)
2428 return check_previous_goto_1 (NULL_TREE, level, level->names, false, NULL);
2431 /* Check that a new jump to a label DECL is OK. Called by
2432 finish_goto_stmt. */
2435 check_goto (tree decl)
2437 struct named_label_entry *ent, dummy;
2438 bool saw_catch = false, identified = false;
2441 /* We can't know where a computed goto is jumping.
2442 So we assume that it's OK. */
2443 if (TREE_CODE (decl) != LABEL_DECL)
2446 /* We didn't record any information about this label when we created it,
2447 and there's not much point since it's trivial to analyze as a return. */
2448 if (decl == cdtor_label)
2451 dummy.label_decl = decl;
2452 ent = (struct named_label_entry *) htab_find (named_labels, &dummy);
2453 gcc_assert (ent != NULL);
2455 /* If the label hasn't been defined yet, defer checking. */
2456 if (! DECL_INITIAL (decl))
2458 struct named_label_use_entry *new_use;
2460 /* Don't bother creating another use if the last goto had the
2461 same data, and will therefore create the same set of errors. */
2463 && ent->uses->names_in_scope == current_binding_level->names)
2466 new_use = GGC_NEW (struct named_label_use_entry);
2467 new_use->binding_level = current_binding_level;
2468 new_use->names_in_scope = current_binding_level->names;
2469 new_use->o_goto_locus = input_location;
2470 new_use->in_omp_scope = false;
2472 new_use->next = ent->uses;
2473 ent->uses = new_use;
2477 if (ent->in_try_scope || ent->in_catch_scope
2478 || ent->in_omp_scope || ent->bad_decls)
2480 pedwarn ("jump to label %q+D", decl);
2481 pedwarn (" from here");
2485 for (bad = ent->bad_decls; bad; bad = TREE_CHAIN (bad))
2487 tree b = TREE_VALUE (bad);
2488 int u = decl_jump_unsafe (b);
2490 if (u > 1 && DECL_ARTIFICIAL (b))
2492 /* Can't skip init of __exception_info. */
2493 error ("%J enters catch block", b);
2497 error (" skips initialization of %q+#D", b);
2499 pedwarn (" enters scope of non-POD %q+#D", b);
2502 if (ent->in_try_scope)
2503 error (" enters try block");
2504 else if (ent->in_catch_scope && !saw_catch)
2505 error (" enters catch block");
2507 if (ent->in_omp_scope)
2508 error (" enters OpenMP structured block");
2509 else if (flag_openmp)
2511 struct cp_binding_level *b;
2512 for (b = current_binding_level; b ; b = b->level_chain)
2514 if (b == ent->binding_level)
2516 if (b->kind == sk_omp)
2520 pedwarn ("jump to label %q+D", decl);
2521 pedwarn (" from here");
2524 error (" exits OpenMP structured block");
2531 /* Check that a return is ok wrt OpenMP structured blocks.
2532 Called by finish_return_stmt. Returns true if all is well. */
2535 check_omp_return (void)
2537 struct cp_binding_level *b;
2538 for (b = current_binding_level; b ; b = b->level_chain)
2539 if (b->kind == sk_omp)
2541 error ("invalid exit from OpenMP structured block");
2547 /* Define a label, specifying the location in the source file.
2548 Return the LABEL_DECL node for the label. */
2551 define_label (location_t location, tree name)
2553 struct named_label_entry *ent, dummy;
2554 struct cp_binding_level *p;
2557 timevar_push (TV_NAME_LOOKUP);
2559 decl = lookup_label (name);
2561 dummy.label_decl = decl;
2562 ent = (struct named_label_entry *) htab_find (named_labels, &dummy);
2563 gcc_assert (ent != NULL);
2565 /* After labels, make any new cleanups in the function go into their
2566 own new (temporary) binding contour. */
2567 for (p = current_binding_level;
2568 p->kind != sk_function_parms;
2570 p->more_cleanups_ok = 0;
2572 if (name == get_identifier ("wchar_t"))
2573 pedwarn ("label named wchar_t");
2575 if (DECL_INITIAL (decl) != NULL_TREE)
2577 error ("duplicate label %qD", decl);
2578 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
2582 struct named_label_use_entry *use;
2584 /* Mark label as having been defined. */
2585 DECL_INITIAL (decl) = error_mark_node;
2586 /* Say where in the source. */
2587 DECL_SOURCE_LOCATION (decl) = location;
2589 ent->binding_level = current_binding_level;
2590 ent->names_in_scope = current_binding_level->names;
2592 for (use = ent->uses; use ; use = use->next)
2593 check_previous_goto (decl, use);
2597 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2602 struct cp_binding_level *level;
2603 struct cp_switch *next;
2604 /* The SWITCH_STMT being built. */
2606 /* A splay-tree mapping the low element of a case range to the high
2607 element, or NULL_TREE if there is no high element. Used to
2608 determine whether or not a new case label duplicates an old case
2609 label. We need a tree, rather than simply a hash table, because
2610 of the GNU case range extension. */
2614 /* A stack of the currently active switch statements. The innermost
2615 switch statement is on the top of the stack. There is no need to
2616 mark the stack for garbage collection because it is only active
2617 during the processing of the body of a function, and we never
2618 collect at that point. */
2620 static struct cp_switch *switch_stack;
2622 /* Called right after a switch-statement condition is parsed.
2623 SWITCH_STMT is the switch statement being parsed. */
2626 push_switch (tree switch_stmt)
2628 struct cp_switch *p = XNEW (struct cp_switch);
2629 p->level = current_binding_level;
2630 p->next = switch_stack;
2631 p->switch_stmt = switch_stmt;
2632 p->cases = splay_tree_new (case_compare, NULL, NULL);
2639 struct cp_switch *cs = switch_stack;
2640 location_t switch_location;
2642 /* Emit warnings as needed. */
2643 if (EXPR_HAS_LOCATION (cs->switch_stmt))
2644 switch_location = EXPR_LOCATION (cs->switch_stmt);
2646 switch_location = input_location;
2647 if (!processing_template_decl)
2648 c_do_switch_warnings (cs->cases, switch_location,
2649 SWITCH_STMT_TYPE (cs->switch_stmt),
2650 SWITCH_STMT_COND (cs->switch_stmt));
2652 splay_tree_delete (cs->cases);
2653 switch_stack = switch_stack->next;
2657 /* Note that we've seen a definition of a case label, and complain if this
2658 is a bad place for one. */
2661 finish_case_label (tree low_value, tree high_value)
2664 struct cp_binding_level *p;
2666 if (processing_template_decl)
2670 /* For templates, just add the case label; we'll do semantic
2671 analysis at instantiation-time. */
2672 label = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
2673 return add_stmt (build_case_label (low_value, high_value, label));
2676 /* Find the condition on which this switch statement depends. */
2677 cond = SWITCH_STMT_COND (switch_stack->switch_stmt);
2678 if (cond && TREE_CODE (cond) == TREE_LIST)
2679 cond = TREE_VALUE (cond);
2681 if (!check_switch_goto (switch_stack->level))
2682 return error_mark_node;
2684 r = c_add_case_label (switch_stack->cases, cond, TREE_TYPE (cond),
2685 low_value, high_value);
2687 /* After labels, make any new cleanups in the function go into their
2688 own new (temporary) binding contour. */
2689 for (p = current_binding_level;
2690 p->kind != sk_function_parms;
2692 p->more_cleanups_ok = 0;
2697 /* Hash a TYPENAME_TYPE. K is really of type `tree'. */
2700 typename_hash (const void* k)
2705 hash = (htab_hash_pointer (TYPE_CONTEXT (t))
2706 ^ htab_hash_pointer (DECL_NAME (TYPE_NAME (t))));
2711 typedef struct typename_info {
2719 /* Compare two TYPENAME_TYPEs. K1 is really of type `tree', K2 is
2720 really of type `typename_info*' */
2723 typename_compare (const void * k1, const void * k2)
2726 const typename_info *t2;
2729 t2 = (const typename_info *) k2;
2731 return (DECL_NAME (TYPE_NAME (t1)) == t2->name
2732 && TYPE_CONTEXT (t1) == t2->scope
2733 && TYPENAME_TYPE_FULLNAME (t1) == t2->template_id
2734 && TYPENAME_IS_ENUM_P (t1) == t2->enum_p
2735 && TYPENAME_IS_CLASS_P (t1) == t2->class_p);
2738 /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
2739 the type of `T', NAME is the IDENTIFIER_NODE for `t'.
2741 Returns the new TYPENAME_TYPE. */
2743 static GTY ((param_is (union tree_node))) htab_t typename_htab;
2746 build_typename_type (tree context, tree name, tree fullname,
2747 enum tag_types tag_type)
2755 if (typename_htab == NULL)
2756 typename_htab = htab_create_ggc (61, &typename_hash,
2757 &typename_compare, NULL);
2759 ti.scope = FROB_CONTEXT (context);
2761 ti.template_id = fullname;
2762 ti.enum_p = tag_type == enum_type;
2763 ti.class_p = (tag_type == class_type
2764 || tag_type == record_type
2765 || tag_type == union_type);
2766 hash = (htab_hash_pointer (ti.scope)
2767 ^ htab_hash_pointer (ti.name));
2769 /* See if we already have this type. */
2770 e = htab_find_slot_with_hash (typename_htab, &ti, hash, INSERT);
2775 /* Build the TYPENAME_TYPE. */
2776 t = make_aggr_type (TYPENAME_TYPE);
2777 TYPE_CONTEXT (t) = ti.scope;
2778 TYPENAME_TYPE_FULLNAME (t) = ti.template_id;
2779 TYPENAME_IS_ENUM_P (t) = ti.enum_p;
2780 TYPENAME_IS_CLASS_P (t) = ti.class_p;
2782 /* Build the corresponding TYPE_DECL. */
2783 d = build_decl (TYPE_DECL, name, t);
2784 TYPE_NAME (TREE_TYPE (d)) = d;
2785 TYPE_STUB_DECL (TREE_TYPE (d)) = d;
2786 DECL_CONTEXT (d) = FROB_CONTEXT (context);
2787 DECL_ARTIFICIAL (d) = 1;
2789 /* Store it in the hash table. */
2792 /* TYPENAME_TYPEs must always be compared structurally, because
2793 they may or may not resolve down to another type depending on
2794 the currently open classes. */
2795 SET_TYPE_STRUCTURAL_EQUALITY (t);
2801 /* Resolve `typename CONTEXT::NAME'. TAG_TYPE indicates the tag
2802 provided to name the type. Returns an appropriate type, unless an
2803 error occurs, in which case error_mark_node is returned. If we
2804 locate a non-artificial TYPE_DECL and TF_KEEP_TYPE_DECL is set, we
2805 return that, rather than the _TYPE it corresponds to, in other
2806 cases we look through the type decl. If TF_ERROR is set, complain
2807 about errors, otherwise be quiet. */
2810 make_typename_type (tree context, tree name, enum tag_types tag_type,
2811 tsubst_flags_t complain)
2817 if (name == error_mark_node
2818 || context == NULL_TREE
2819 || context == error_mark_node)
2820 return error_mark_node;
2824 if (!(TYPE_LANG_SPECIFIC (name)
2825 && (CLASSTYPE_IS_TEMPLATE (name)
2826 || CLASSTYPE_USE_TEMPLATE (name))))
2827 name = TYPE_IDENTIFIER (name);
2829 /* Create a TEMPLATE_ID_EXPR for the type. */
2830 name = build_nt (TEMPLATE_ID_EXPR,
2831 CLASSTYPE_TI_TEMPLATE (name),
2832 CLASSTYPE_TI_ARGS (name));
2834 else if (TREE_CODE (name) == TYPE_DECL)
2835 name = DECL_NAME (name);
2839 if (TREE_CODE (name) == TEMPLATE_ID_EXPR)
2841 name = TREE_OPERAND (name, 0);
2842 if (TREE_CODE (name) == TEMPLATE_DECL)
2843 name = TREE_OPERAND (fullname, 0) = DECL_NAME (name);
2844 else if (TREE_CODE (name) == OVERLOAD)
2846 error ("%qD is not a type", name);
2847 return error_mark_node;
2850 if (TREE_CODE (name) == TEMPLATE_DECL)
2852 error ("%qD used without template parameters", name);
2853 return error_mark_node;
2855 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
2856 gcc_assert (TYPE_P (context));
2858 /* When the CONTEXT is a dependent type, NAME could refer to a
2859 dependent base class of CONTEXT. So we cannot peek inside it,
2860 even if CONTEXT is a currently open scope. */
2861 if (dependent_type_p (context))
2862 return build_typename_type (context, name, fullname, tag_type);
2864 if (!IS_AGGR_TYPE (context))
2866 if (complain & tf_error)
2867 error ("%q#T is not a class", context);
2868 return error_mark_node;
2871 want_template = TREE_CODE (fullname) == TEMPLATE_ID_EXPR;
2873 /* We should only set WANT_TYPE when we're a nested typename type.
2874 Then we can give better diagnostics if we find a non-type. */
2875 t = lookup_field (context, name, 0, /*want_type=*/true);
2878 if (complain & tf_error)
2879 error (want_template ? "no class template named %q#T in %q#T"
2880 : "no type named %q#T in %q#T", name, context);
2881 return error_mark_node;
2884 if (want_template && !DECL_CLASS_TEMPLATE_P (t))
2886 if (complain & tf_error)
2887 error ("%<typename %T::%D%> names %q#T, which is not a class template",
2889 return error_mark_node;
2891 if (!want_template && TREE_CODE (t) != TYPE_DECL)
2893 if (complain & tf_error)
2894 error ("%<typename %T::%D%> names %q#T, which is not a type",
2896 return error_mark_node;
2899 if (complain & tf_error)
2900 perform_or_defer_access_check (TYPE_BINFO (context), t, t);
2903 return lookup_template_class (t, TREE_OPERAND (fullname, 1),
2905 /*entering_scope=*/0,
2906 tf_warning_or_error | tf_user);
2908 if (DECL_ARTIFICIAL (t) || !(complain & tf_keep_type_decl))
2914 /* Resolve `CONTEXT::template NAME'. Returns a TEMPLATE_DECL if the name
2915 can be resolved or an UNBOUND_CLASS_TEMPLATE, unless an error occurs,
2916 in which case error_mark_node is returned.
2918 If PARM_LIST is non-NULL, also make sure that the template parameter
2919 list of TEMPLATE_DECL matches.
2921 If COMPLAIN zero, don't complain about any errors that occur. */
2924 make_unbound_class_template (tree context, tree name, tree parm_list,
2925 tsubst_flags_t complain)
2931 name = TYPE_IDENTIFIER (name);
2932 else if (DECL_P (name))
2933 name = DECL_NAME (name);
2934 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
2936 if (!dependent_type_p (context)
2937 || currently_open_class (context))
2939 tree tmpl = NULL_TREE;
2941 if (IS_AGGR_TYPE (context))
2942 tmpl = lookup_field (context, name, 0, false);
2944 if (!tmpl || !DECL_CLASS_TEMPLATE_P (tmpl))
2946 if (complain & tf_error)
2947 error ("no class template named %q#T in %q#T", name, context);
2948 return error_mark_node;
2952 && !comp_template_parms (DECL_TEMPLATE_PARMS (tmpl), parm_list))
2954 if (complain & tf_error)
2956 error ("template parameters do not match template");
2957 error ("%q+D declared here", tmpl);
2959 return error_mark_node;
2962 if (complain & tf_error)
2963 perform_or_defer_access_check (TYPE_BINFO (context), tmpl, tmpl);
2968 /* Build the UNBOUND_CLASS_TEMPLATE. */
2969 t = make_aggr_type (UNBOUND_CLASS_TEMPLATE);
2970 TYPE_CONTEXT (t) = FROB_CONTEXT (context);
2971 TREE_TYPE (t) = NULL_TREE;
2972 SET_TYPE_STRUCTURAL_EQUALITY (t);
2974 /* Build the corresponding TEMPLATE_DECL. */
2975 d = build_decl (TEMPLATE_DECL, name, t);
2976 TYPE_NAME (TREE_TYPE (d)) = d;
2977 TYPE_STUB_DECL (TREE_TYPE (d)) = d;
2978 DECL_CONTEXT (d) = FROB_CONTEXT (context);
2979 DECL_ARTIFICIAL (d) = 1;
2980 DECL_TEMPLATE_PARMS (d) = parm_list;
2987 /* Push the declarations of builtin types into the namespace.
2988 RID_INDEX is the index of the builtin type in the array
2989 RID_POINTERS. NAME is the name used when looking up the builtin
2990 type. TYPE is the _TYPE node for the builtin type. */
2993 record_builtin_type (enum rid rid_index,
2997 tree rname = NULL_TREE, tname = NULL_TREE;
2998 tree tdecl = NULL_TREE;
3000 if ((int) rid_index < (int) RID_MAX)
3001 rname = ridpointers[(int) rid_index];
3003 tname = get_identifier (name);
3005 /* The calls to SET_IDENTIFIER_GLOBAL_VALUE below should be
3006 eliminated. Built-in types should not be looked up name; their
3007 names are keywords that the parser can recognize. However, there
3008 is code in c-common.c that uses identifier_global_value to look
3009 up built-in types by name. */
3012 tdecl = build_decl (TYPE_DECL, tname, type);
3013 DECL_ARTIFICIAL (tdecl) = 1;
3014 SET_IDENTIFIER_GLOBAL_VALUE (tname, tdecl);
3020 tdecl = build_decl (TYPE_DECL, rname, type);
3021 DECL_ARTIFICIAL (tdecl) = 1;
3023 SET_IDENTIFIER_GLOBAL_VALUE (rname, tdecl);
3026 if (!TYPE_NAME (type))
3027 TYPE_NAME (type) = tdecl;
3030 debug_hooks->type_decl (tdecl, 0);
3033 /* Record one of the standard Java types.
3034 * Declare it as having the given NAME.
3035 * If SIZE > 0, it is the size of one of the integral types;
3036 * otherwise it is the negative of the size of one of the other types. */
3039 record_builtin_java_type (const char* name, int size)
3043 type = make_signed_type (size);
3044 else if (size > -32)
3045 { /* "__java_char" or ""__java_boolean". */
3046 type = make_unsigned_type (-size);
3047 /*if (size == -1) TREE_SET_CODE (type, BOOLEAN_TYPE);*/
3050 { /* "__java_float" or ""__java_double". */
3051 type = make_node (REAL_TYPE);
3052 TYPE_PRECISION (type) = - size;
3055 record_builtin_type (RID_MAX, name, type);
3056 decl = TYPE_NAME (type);
3058 /* Suppress generate debug symbol entries for these types,
3059 since for normal C++ they are just clutter.
3060 However, push_lang_context undoes this if extern "Java" is seen. */
3061 DECL_IGNORED_P (decl) = 1;
3063 TYPE_FOR_JAVA (type) = 1;
3067 /* Push a type into the namespace so that the back ends ignore it. */
3070 record_unknown_type (tree type, const char* name)
3072 tree decl = pushdecl (build_decl (TYPE_DECL, get_identifier (name), type));
3073 /* Make sure the "unknown type" typedecl gets ignored for debug info. */
3074 DECL_IGNORED_P (decl) = 1;
3075 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
3076 TYPE_SIZE (type) = TYPE_SIZE (void_type_node);
3077 TYPE_ALIGN (type) = 1;
3078 TYPE_USER_ALIGN (type) = 0;
3079 TYPE_MODE (type) = TYPE_MODE (void_type_node);
3082 /* A string for which we should create an IDENTIFIER_NODE at
3085 typedef struct predefined_identifier
3087 /* The name of the identifier. */
3088 const char *const name;
3089 /* The place where the IDENTIFIER_NODE should be stored. */
3091 /* Nonzero if this is the name of a constructor or destructor. */
3092 const int ctor_or_dtor_p;
3093 } predefined_identifier;
3095 /* Create all the predefined identifiers. */
3098 initialize_predefined_identifiers (void)
3100 const predefined_identifier *pid;
3102 /* A table of identifiers to create at startup. */
3103 static const predefined_identifier predefined_identifiers[] = {
3104 { "C++", &lang_name_cplusplus, 0 },
3105 { "C", &lang_name_c, 0 },
3106 { "Java", &lang_name_java, 0 },
3107 /* Some of these names have a trailing space so that it is
3108 impossible for them to conflict with names written by users. */
3109 { "__ct ", &ctor_identifier, 1 },
3110 { "__base_ctor ", &base_ctor_identifier, 1 },
3111 { "__comp_ctor ", &complete_ctor_identifier, 1 },
3112 { "__dt ", &dtor_identifier, 1 },
3113 { "__comp_dtor ", &complete_dtor_identifier, 1 },
3114 { "__base_dtor ", &base_dtor_identifier, 1 },
3115 { "__deleting_dtor ", &deleting_dtor_identifier, 1 },
3116 { IN_CHARGE_NAME, &in_charge_identifier, 0 },
3117 { "nelts", &nelts_identifier, 0 },
3118 { THIS_NAME, &this_identifier, 0 },
3119 { VTABLE_DELTA_NAME, &delta_identifier, 0 },
3120 { VTABLE_PFN_NAME, &pfn_identifier, 0 },
3121 { "_vptr", &vptr_identifier, 0 },
3122 { "__vtt_parm", &vtt_parm_identifier, 0 },
3123 { "::", &global_scope_name, 0 },
3124 { "std", &std_identifier, 0 },
3128 for (pid = predefined_identifiers; pid->name; ++pid)
3130 *pid->node = get_identifier (pid->name);
3131 if (pid->ctor_or_dtor_p)
3132 IDENTIFIER_CTOR_OR_DTOR_P (*pid->node) = 1;
3136 /* Create the predefined scalar types of C,
3137 and some nodes representing standard constants (0, 1, (void *)0).
3138 Initialize the global binding level.
3139 Make definitions for built-in primitive functions. */
3142 cxx_init_decl_processing (void)
3145 tree void_ftype_ptr;
3147 build_common_tree_nodes (flag_signed_char, false);
3149 /* Create all the identifiers we need. */
3150 initialize_predefined_identifiers ();
3152 /* Create the global variables. */
3153 push_to_top_level ();
3155 current_function_decl = NULL_TREE;
3156 current_binding_level = NULL;
3157 /* Enter the global namespace. */
3158 gcc_assert (global_namespace == NULL_TREE);
3159 global_namespace = build_lang_decl (NAMESPACE_DECL, global_scope_name,
3161 TREE_PUBLIC (global_namespace) = 1;
3162 begin_scope (sk_namespace, global_namespace);
3164 current_lang_name = NULL_TREE;
3166 /* Force minimum function alignment if using the least significant
3167 bit of function pointers to store the virtual bit. */
3168 if (TARGET_PTRMEMFUNC_VBIT_LOCATION == ptrmemfunc_vbit_in_pfn
3169 && force_align_functions_log < 1)
3170 force_align_functions_log = 1;
3173 current_lang_name = lang_name_c;
3175 /* Create the `std' namespace. */
3176 push_namespace (std_identifier);
3177 std_node = current_namespace;
3180 c_common_nodes_and_builtins ();
3182 java_byte_type_node = record_builtin_java_type ("__java_byte", 8);
3183 java_short_type_node = record_builtin_java_type ("__java_short", 16);
3184 java_int_type_node = record_builtin_java_type ("__java_int", 32);
3185 java_long_type_node = record_builtin_java_type ("__java_long", 64);
3186 java_float_type_node = record_builtin_java_type ("__java_float", -32);
3187 java_double_type_node = record_builtin_java_type ("__java_double", -64);
3188 java_char_type_node = record_builtin_java_type ("__java_char", -16);
3189 java_boolean_type_node = record_builtin_java_type ("__java_boolean", -1);
3191 integer_two_node = build_int_cst (NULL_TREE, 2);
3192 integer_three_node = build_int_cst (NULL_TREE, 3);
3194 record_builtin_type (RID_BOOL, "bool", boolean_type_node);
3195 truthvalue_type_node = boolean_type_node;
3196 truthvalue_false_node = boolean_false_node;
3197 truthvalue_true_node = boolean_true_node;
3199 empty_except_spec = build_tree_list (NULL_TREE, NULL_TREE);
3202 record_builtin_type (RID_MAX, NULL, string_type_node);
3205 delta_type_node = ptrdiff_type_node;
3206 vtable_index_type = ptrdiff_type_node;
3208 vtt_parm_type = build_pointer_type (const_ptr_type_node);
3209 void_ftype = build_function_type (void_type_node, void_list_node);
3210 void_ftype_ptr = build_function_type (void_type_node,
3211 tree_cons (NULL_TREE,
3215 = build_exception_variant (void_ftype_ptr, empty_except_spec);
3217 /* C++ extensions */
3219 unknown_type_node = make_node (UNKNOWN_TYPE);
3220 record_unknown_type (unknown_type_node, "unknown type");
3222 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
3223 TREE_TYPE (unknown_type_node) = unknown_type_node;
3225 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
3227 TYPE_POINTER_TO (unknown_type_node) = unknown_type_node;
3228 TYPE_REFERENCE_TO (unknown_type_node) = unknown_type_node;
3231 /* Make sure we get a unique function type, so we can give
3232 its pointer type a name. (This wins for gdb.) */
3233 tree vfunc_type = make_node (FUNCTION_TYPE);
3234 TREE_TYPE (vfunc_type) = integer_type_node;
3235 TYPE_ARG_TYPES (vfunc_type) = NULL_TREE;
3236 layout_type (vfunc_type);
3238 vtable_entry_type = build_pointer_type (vfunc_type);
3240 record_builtin_type (RID_MAX, VTBL_PTR_TYPE, vtable_entry_type);
3243 = build_cplus_array_type (vtable_entry_type, NULL_TREE);
3244 layout_type (vtbl_type_node);
3245 vtbl_type_node = build_qualified_type (vtbl_type_node, TYPE_QUAL_CONST);
3246 record_builtin_type (RID_MAX, NULL, vtbl_type_node);
3247 vtbl_ptr_type_node = build_pointer_type (vtable_entry_type);
3248 layout_type (vtbl_ptr_type_node);
3249 record_builtin_type (RID_MAX, NULL, vtbl_ptr_type_node);
3251 push_namespace (get_identifier ("__cxxabiv1"));
3252 abi_node = current_namespace;
3255 global_type_node = make_node (LANG_TYPE);
3256 record_unknown_type (global_type_node, "global type");
3259 current_lang_name = lang_name_cplusplus;
3263 tree bad_alloc_type_node;
3264 tree bad_alloc_decl;
3265 tree newtype, deltype;
3266 tree ptr_ftype_sizetype;
3268 push_namespace (std_identifier);
3269 bad_alloc_id = get_identifier ("bad_alloc");
3270 bad_alloc_type_node = make_aggr_type (RECORD_TYPE);
3271 TYPE_CONTEXT (bad_alloc_type_node) = current_namespace;
3273 = create_implicit_typedef (bad_alloc_id, bad_alloc_type_node);
3274 DECL_CONTEXT (bad_alloc_decl) = current_namespace;
3275 TYPE_STUB_DECL (bad_alloc_type_node) = bad_alloc_decl;
3279 = build_function_type (ptr_type_node,
3280 tree_cons (NULL_TREE,
3283 newtype = build_exception_variant
3284 (ptr_ftype_sizetype, add_exception_specifier
3285 (NULL_TREE, bad_alloc_type_node, -1));
3286 deltype = build_exception_variant (void_ftype_ptr, empty_except_spec);
3287 push_cp_library_fn (NEW_EXPR, newtype);
3288 push_cp_library_fn (VEC_NEW_EXPR, newtype);
3289 global_delete_fndecl = push_cp_library_fn (DELETE_EXPR, deltype);
3290 push_cp_library_fn (VEC_DELETE_EXPR, deltype);
3294 = build_library_fn_ptr ("__cxa_pure_virtual", void_ftype);
3296 /* Perform other language dependent initializations. */
3297 init_class_processing ();
3298 init_rtti_processing ();
3300 if (flag_exceptions)
3301 init_exception_processing ();
3303 if (! supports_one_only ())
3306 make_fname_decl = cp_make_fname_decl;
3307 start_fname_decls ();
3309 /* Show we use EH for cleanups. */
3310 if (flag_exceptions)
3311 using_eh_for_cleanups ();
3314 /* Generate an initializer for a function naming variable from
3315 NAME. NAME may be NULL, to indicate a dependent name. TYPE_P is
3316 filled in with the type of the init. */
3319 cp_fname_init (const char* name, tree *type_p)
3321 tree domain = NULL_TREE;
3323 tree init = NULL_TREE;
3328 length = strlen (name);
3329 domain = build_index_type (size_int (length));
3330 init = build_string (length + 1, name);
3333 type = build_qualified_type (char_type_node, TYPE_QUAL_CONST);
3334 type = build_cplus_array_type (type, domain);
3339 TREE_TYPE (init) = type;
3341 init = error_mark_node;
3346 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give the
3347 decl, NAME is the initialization string and TYPE_DEP indicates whether
3348 NAME depended on the type of the function. We make use of that to detect
3349 __PRETTY_FUNCTION__ inside a template fn. This is being done
3350 lazily at the point of first use, so we mustn't push the decl now. */
3353 cp_make_fname_decl (tree id, int type_dep)
3355 const char *const name = (type_dep && processing_template_decl
3356 ? NULL : fname_as_string (type_dep));
3358 tree init = cp_fname_init (name, &type);
3359 tree decl = build_decl (VAR_DECL, id, type);
3362 free ((char *) name);
3364 /* As we're using pushdecl_with_scope, we must set the context. */
3365 DECL_CONTEXT (decl) = current_function_decl;
3366 DECL_PRETTY_FUNCTION_P (decl) = type_dep;
3368 TREE_STATIC (decl) = 1;
3369 TREE_READONLY (decl) = 1;
3370 DECL_ARTIFICIAL (decl) = 1;
3372 TREE_USED (decl) = 1;
3374 if (current_function_decl)
3376 struct cp_binding_level *b = current_binding_level;
3377 while (b->level_chain->kind != sk_function_parms)
3379 pushdecl_with_scope (decl, b, /*is_friend=*/false);
3380 cp_finish_decl (decl, init, /*init_const_expr_p=*/false, NULL_TREE,
3381 LOOKUP_ONLYCONVERTING);
3384 pushdecl_top_level_and_finish (decl, init);
3390 builtin_function_1 (tree decl, tree context)
3392 tree id = DECL_NAME (decl);
3393 const char *name = IDENTIFIER_POINTER (id);
3395 retrofit_lang_decl (decl);
3397 /* All nesting of C++ functions is lexical; there is never a "static
3398 chain" in the sense of GNU C nested functions. */
3399 DECL_NO_STATIC_CHAIN (decl) = 1;
3401 DECL_ARTIFICIAL (decl) = 1;
3402 SET_OVERLOADED_OPERATOR_CODE (decl, ERROR_MARK);
3403 SET_DECL_LANGUAGE (decl, lang_c);
3404 /* Runtime library routines are, by definition, available in an
3405 external shared object. */
3406 DECL_VISIBILITY (decl) = VISIBILITY_DEFAULT;
3407 DECL_VISIBILITY_SPECIFIED (decl) = 1;
3409 DECL_CONTEXT (decl) = context;
3413 /* A function in the user's namespace should have an explicit
3414 declaration before it is used. Mark the built-in function as
3415 anticipated but not actually declared. */
3416 if (name[0] != '_' || name[1] != '_')
3417 DECL_ANTICIPATED (decl) = 1;
3423 cxx_builtin_function (tree decl)
3425 tree id = DECL_NAME (decl);
3426 const char *name = IDENTIFIER_POINTER (id);
3427 /* All builtins that don't begin with an '_' should additionally
3428 go in the 'std' namespace. */
3431 tree decl2 = copy_node(decl);
3432 push_namespace (std_identifier);
3433 builtin_function_1 (decl2, std_node);
3437 return builtin_function_1 (decl, NULL_TREE);
3440 /* Generate a FUNCTION_DECL with the typical flags for a runtime library
3441 function. Not called directly. */
3444 build_library_fn_1 (tree name, enum tree_code operator_code, tree type)
3446 tree fn = build_lang_decl (FUNCTION_DECL, name, type);
3447 DECL_EXTERNAL (fn) = 1;
3448 TREE_PUBLIC (fn) = 1;
3449 DECL_ARTIFICIAL (fn) = 1;
3450 SET_OVERLOADED_OPERATOR_CODE (fn, operator_code);
3451 SET_DECL_LANGUAGE (fn, lang_c);
3452 /* Runtime library routines are, by definition, available in an
3453 external shared object. */
3454 DECL_VISIBILITY (fn) = VISIBILITY_DEFAULT;
3455 DECL_VISIBILITY_SPECIFIED (fn) = 1;
3459 /* Returns the _DECL for a library function with C linkage.
3460 We assume that such functions never throw; if this is incorrect,
3461 callers should unset TREE_NOTHROW. */
3464 build_library_fn (tree name, tree type)
3466 tree fn = build_library_fn_1 (name, ERROR_MARK, type);
3467 TREE_NOTHROW (fn) = 1;
3471 /* Returns the _DECL for a library function with C++ linkage. */
3474 build_cp_library_fn (tree name, enum tree_code operator_code, tree type)
3476 tree fn = build_library_fn_1 (name, operator_code, type);
3477 TREE_NOTHROW (fn) = TYPE_NOTHROW_P (type);
3478 DECL_CONTEXT (fn) = FROB_CONTEXT (current_namespace);
3479 SET_DECL_LANGUAGE (fn, lang_cplusplus);
3483 /* Like build_library_fn, but takes a C string instead of an
3487 build_library_fn_ptr (const char* name, tree type)
3489 return build_library_fn (get_identifier (name), type);
3492 /* Like build_cp_library_fn, but takes a C string instead of an
3496 build_cp_library_fn_ptr (const char* name, tree type)
3498 return build_cp_library_fn (get_identifier (name), ERROR_MARK, type);
3501 /* Like build_library_fn, but also pushes the function so that we will
3502 be able to find it via IDENTIFIER_GLOBAL_VALUE. */
3505 push_library_fn (tree name, tree type)
3507 tree fn = build_library_fn (name, type);
3508 pushdecl_top_level (fn);
3512 /* Like build_cp_library_fn, but also pushes the function so that it
3513 will be found by normal lookup. */
3516 push_cp_library_fn (enum tree_code operator_code, tree type)
3518 tree fn = build_cp_library_fn (ansi_opname (operator_code),
3525 /* Like push_library_fn, but takes a TREE_LIST of parm types rather than
3529 push_void_library_fn (tree name, tree parmtypes)
3531 tree type = build_function_type (void_type_node, parmtypes);
3532 return push_library_fn (name, type);
3535 /* Like push_library_fn, but also note that this function throws
3536 and does not return. Used for __throw_foo and the like. */
3539 push_throw_library_fn (tree name, tree type)
3541 tree fn = push_library_fn (name, type);
3542 TREE_THIS_VOLATILE (fn) = 1;
3543 TREE_NOTHROW (fn) = 0;
3547 /* When we call finish_struct for an anonymous union, we create
3548 default copy constructors and such. But, an anonymous union
3549 shouldn't have such things; this function undoes the damage to the
3550 anonymous union type T.
3552 (The reason that we create the synthesized methods is that we don't
3553 distinguish `union { int i; }' from `typedef union { int i; } U'.
3554 The first is an anonymous union; the second is just an ordinary
3558 fixup_anonymous_aggr (tree t)
3562 /* Wipe out memory of synthesized methods. */
3563 TYPE_HAS_CONSTRUCTOR (t) = 0;
3564 TYPE_HAS_DEFAULT_CONSTRUCTOR (t) = 0;
3565 TYPE_HAS_INIT_REF (t) = 0;
3566 TYPE_HAS_CONST_INIT_REF (t) = 0;
3567 TYPE_HAS_ASSIGN_REF (t) = 0;
3568 TYPE_HAS_CONST_ASSIGN_REF (t) = 0;
3570 /* Splice the implicitly generated functions out of the TYPE_METHODS
3572 q = &TYPE_METHODS (t);
3575 if (DECL_ARTIFICIAL (*q))
3576 *q = TREE_CHAIN (*q);
3578 q = &TREE_CHAIN (*q);
3581 /* ISO C++ 9.5.3. Anonymous unions may not have function members. */
3582 if (TYPE_METHODS (t))
3583 error ("%Jan anonymous union cannot have function members",
3584 TYPE_MAIN_DECL (t));
3586 /* Anonymous aggregates cannot have fields with ctors, dtors or complex
3587 assignment operators (because they cannot have these methods themselves).
3588 For anonymous unions this is already checked because they are not allowed
3589 in any union, otherwise we have to check it. */
3590 if (TREE_CODE (t) != UNION_TYPE)
3594 for (field = TYPE_FIELDS (t); field; field = TREE_CHAIN (field))
3595 if (TREE_CODE (field) == FIELD_DECL)
3597 type = TREE_TYPE (field);
3598 if (CLASS_TYPE_P (type))
3600 if (TYPE_NEEDS_CONSTRUCTING (type))
3601 error ("member %q+#D with constructor not allowed "
3602 "in anonymous aggregate", field);
3603 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
3604 error ("member %q+#D with destructor not allowed "
3605 "in anonymous aggregate", field);
3606 if (TYPE_HAS_COMPLEX_ASSIGN_REF (type))
3607 error ("member %q+#D with copy assignment operator "
3608 "not allowed in anonymous aggregate", field);
3614 /* Make sure that a declaration with no declarator is well-formed, i.e.
3615 just declares a tagged type or anonymous union.
3617 Returns the type declared; or NULL_TREE if none. */
3620 check_tag_decl (cp_decl_specifier_seq *declspecs)
3622 int saw_friend = declspecs->specs[(int)ds_friend] != 0;
3623 int saw_typedef = declspecs->specs[(int)ds_typedef] != 0;
3624 /* If a class, struct, or enum type is declared by the DECLSPECS
3625 (i.e, if a class-specifier, enum-specifier, or non-typename
3626 elaborated-type-specifier appears in the DECLSPECS),
3627 DECLARED_TYPE is set to the corresponding type. */
3628 tree declared_type = NULL_TREE;
3629 bool error_p = false;
3631 if (declspecs->multiple_types_p)
3632 error ("multiple types in one declaration");
3633 else if (declspecs->redefined_builtin_type)
3635 if (!in_system_header)
3636 pedwarn ("redeclaration of C++ built-in type %qT",
3637 declspecs->redefined_builtin_type);
3642 && TYPE_P (declspecs->type)
3643 && ((TREE_CODE (declspecs->type) != TYPENAME_TYPE
3644 && IS_AGGR_TYPE (declspecs->type))
3645 || TREE_CODE (declspecs->type) == ENUMERAL_TYPE))
3646 declared_type = declspecs->type;
3647 else if (declspecs->type == error_mark_node)
3649 if (declared_type == NULL_TREE && ! saw_friend && !error_p)
3650 pedwarn ("declaration does not declare anything");
3651 /* Check for an anonymous union. */
3652 else if (declared_type && IS_AGGR_TYPE_CODE (TREE_CODE (declared_type))
3653 && TYPE_ANONYMOUS_P (declared_type))
3655 /* 7/3 In a simple-declaration, the optional init-declarator-list
3656 can be omitted only when declaring a class (clause 9) or
3657 enumeration (7.2), that is, when the decl-specifier-seq contains
3658 either a class-specifier, an elaborated-type-specifier with
3659 a class-key (9.1), or an enum-specifier. In these cases and
3660 whenever a class-specifier or enum-specifier is present in the
3661 decl-specifier-seq, the identifiers in these specifiers are among
3662 the names being declared by the declaration (as class-name,
3663 enum-names, or enumerators, depending on the syntax). In such
3664 cases, and except for the declaration of an unnamed bit-field (9.6),
3665 the decl-specifier-seq shall introduce one or more names into the
3666 program, or shall redeclare a name introduced by a previous
3667 declaration. [Example:
3668 enum { }; // ill-formed
3669 typedef class { }; // ill-formed
3673 error ("missing type-name in typedef-declaration");
3676 /* Anonymous unions are objects, so they can have specifiers. */;
3677 SET_ANON_AGGR_TYPE_P (declared_type);
3679 if (TREE_CODE (declared_type) != UNION_TYPE && pedantic
3680 && !in_system_header)
3681 pedwarn ("ISO C++ prohibits anonymous structs");
3686 if (declspecs->specs[(int)ds_inline]
3687 || declspecs->specs[(int)ds_virtual])
3688 error ("%qs can only be specified for functions",
3689 declspecs->specs[(int)ds_inline]
3690 ? "inline" : "virtual");
3692 && (!current_class_type
3693 || current_scope () != current_class_type))
3694 error ("%<friend%> can only be specified inside a class");
3695 else if (declspecs->specs[(int)ds_explicit])
3696 error ("%<explicit%> can only be specified for constructors");
3697 else if (declspecs->storage_class)
3698 error ("a storage class can only be specified for objects "
3700 else if (declspecs->specs[(int)ds_const]
3701 || declspecs->specs[(int)ds_volatile]
3702 || declspecs->specs[(int)ds_restrict]
3703 || declspecs->specs[(int)ds_thread])
3704 error ("qualifiers can only be specified for objects "
3706 else if (saw_typedef)
3707 warning (0, "%<typedef%> was ignored in this declaration");
3710 return declared_type;
3713 /* Called when a declaration is seen that contains no names to declare.
3714 If its type is a reference to a structure, union or enum inherited
3715 from a containing scope, shadow that tag name for the current scope
3716 with a forward reference.
3717 If its type defines a new named structure or union
3718 or defines an enum, it is valid but we need not do anything here.
3719 Otherwise, it is an error.
3721 C++: may have to grok the declspecs to learn about static,
3722 complain for anonymous unions.
3724 Returns the TYPE declared -- or NULL_TREE if none. */
3727 shadow_tag (cp_decl_specifier_seq *declspecs)
3729 tree t = check_tag_decl (declspecs);
3734 if (declspecs->attributes)
3736 warning (0, "attribute ignored in declaration of %q+#T", t);
3737 warning (0, "attribute for %q+#T must follow the %qs keyword",
3738 t, class_key_or_enum_as_string (t));
3742 if (maybe_process_partial_specialization (t) == error_mark_node)
3745 /* This is where the variables in an anonymous union are
3746 declared. An anonymous union declaration looks like:
3748 because there is no declarator after the union, the parser
3749 sends that declaration here. */
3750 if (ANON_AGGR_TYPE_P (t))
3752 fixup_anonymous_aggr (t);
3754 if (TYPE_FIELDS (t))
3756 tree decl = grokdeclarator (/*declarator=*/NULL,
3757 declspecs, NORMAL, 0, NULL);
3758 finish_anon_union (decl);
3765 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
3768 groktypename (cp_decl_specifier_seq *type_specifiers,
3769 const cp_declarator *declarator)
3773 attrs = type_specifiers->attributes;
3774 type_specifiers->attributes = NULL_TREE;
3775 type = grokdeclarator (declarator, type_specifiers, TYPENAME, 0, &attrs);
3777 cplus_decl_attributes (&type, attrs, 0);
3781 /* Decode a declarator in an ordinary declaration or data definition.
3782 This is called as soon as the type information and variable name
3783 have been parsed, before parsing the initializer if any.
3784 Here we create the ..._DECL node, fill in its type,
3785 and put it on the list of decls for the current context.
3786 The ..._DECL node is returned as the value.
3788 Exception: for arrays where the length is not specified,
3789 the type is left null, to be filled in by `cp_finish_decl'.
3791 Function definitions do not come here; they go to start_function
3792 instead. However, external and forward declarations of functions
3793 do go through here. Structure field declarations are done by
3794 grokfield and not through here. */
3797 start_decl (const cp_declarator *declarator,
3798 cp_decl_specifier_seq *declspecs,
3801 tree prefix_attributes,
3802 tree *pushed_scope_p)
3809 *pushed_scope_p = NULL_TREE;
3811 /* An object declared as __attribute__((deprecated)) suppresses
3812 warnings of uses of other deprecated items. */
3813 if (lookup_attribute ("deprecated", attributes))
3814 deprecated_state = DEPRECATED_SUPPRESS;
3816 attributes = chainon (attributes, prefix_attributes);
3818 decl = grokdeclarator (declarator, declspecs, NORMAL, initialized,
3821 deprecated_state = DEPRECATED_NORMAL;
3823 if (decl == NULL_TREE || TREE_CODE (decl) == VOID_TYPE
3824 || decl == error_mark_node)
3825 return error_mark_node;
3827 type = TREE_TYPE (decl);
3829 context = DECL_CONTEXT (decl);
3833 *pushed_scope_p = push_scope (context);
3835 /* We are only interested in class contexts, later. */
3836 if (TREE_CODE (context) == NAMESPACE_DECL)
3837 context = NULL_TREE;
3841 /* Is it valid for this decl to have an initializer at all?
3842 If not, set INITIALIZED to zero, which will indirectly
3843 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
3844 switch (TREE_CODE (decl))
3847 error ("typedef %qD is initialized (use __typeof__ instead)", decl);
3848 return error_mark_node;
3851 error ("function %q#D is initialized like a variable", decl);
3852 return error_mark_node;
3860 if (! toplevel_bindings_p ()
3861 && DECL_EXTERNAL (decl))
3862 warning (0, "declaration of %q#D has %<extern%> and is initialized",
3864 DECL_EXTERNAL (decl) = 0;
3865 if (toplevel_bindings_p ())
3866 TREE_STATIC (decl) = 1;
3869 /* Set attributes here so if duplicate decl, will have proper attributes. */
3870 cplus_decl_attributes (&decl, attributes, 0);
3872 /* Dllimported symbols cannot be defined. Static data members (which
3873 can be initialized in-class and dllimported) go through grokfield,
3874 not here, so we don't need to exclude those decls when checking for
3876 if (initialized && DECL_DLLIMPORT_P (decl))
3878 error ("definition of %q#D is marked %<dllimport%>", decl);
3879 DECL_DLLIMPORT_P (decl) = 0;
3882 /* If #pragma weak was used, mark the decl weak now. */
3883 maybe_apply_pragma_weak (decl);
3885 if (TREE_CODE (decl) == FUNCTION_DECL
3886 && DECL_DECLARED_INLINE_P (decl)
3887 && DECL_UNINLINABLE (decl)
3888 && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl)))
3889 warning (0, "inline function %q+D given attribute noinline", decl);
3891 if (context && COMPLETE_TYPE_P (complete_type (context)))
3893 if (TREE_CODE (decl) == VAR_DECL)
3895 tree field = lookup_field (context, DECL_NAME (decl), 0, false);
3896 if (field == NULL_TREE || TREE_CODE (field) != VAR_DECL)
3897 error ("%q#D is not a static member of %q#T", decl, context);
3900 if (DECL_CONTEXT (field) != context)
3902 if (!same_type_p (DECL_CONTEXT (field), context))
3903 pedwarn ("ISO C++ does not permit %<%T::%D%> "
3904 "to be defined as %<%T::%D%>",
3905 DECL_CONTEXT (field), DECL_NAME (decl),
3906 context, DECL_NAME (decl));
3907 DECL_CONTEXT (decl) = DECL_CONTEXT (field);
3909 if (processing_specialization
3910 && template_class_depth (context) == 0
3911 && CLASSTYPE_TEMPLATE_SPECIALIZATION (context))
3912 error ("template header not allowed in member definition "
3913 "of explicitly specialized class");
3914 /* Static data member are tricky; an in-class initialization
3915 still doesn't provide a definition, so the in-class
3916 declaration will have DECL_EXTERNAL set, but will have an
3917 initialization. Thus, duplicate_decls won't warn
3918 about this situation, and so we check here. */
3919 if (initialized && DECL_INITIALIZED_IN_CLASS_P (field))
3920 error ("duplicate initialization of %qD", decl);
3921 if (duplicate_decls (decl, field, /*newdecl_is_friend=*/false))
3927 tree field = check_classfn (context, decl,
3928 (processing_template_decl
3929 > template_class_depth (context))
3930 ? current_template_parms
3932 if (field && duplicate_decls (decl, field,
3933 /*newdecl_is_friend=*/false))
3937 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
3938 DECL_IN_AGGR_P (decl) = 0;
3939 /* Do not mark DECL as an explicit specialization if it was not
3940 already marked as an instantiation; a declaration should
3941 never be marked as a specialization unless we know what
3942 template is being specialized. */
3943 if (DECL_LANG_SPECIFIC (decl) && DECL_USE_TEMPLATE (decl))
3945 SET_DECL_TEMPLATE_SPECIALIZATION (decl);
3947 /* [temp.expl.spec] An explicit specialization of a static data
3948 member of a template is a definition if the declaration
3949 includes an initializer; otherwise, it is a declaration.
3951 We check for processing_specialization so this only applies
3952 to the new specialization syntax. */
3953 if (!initialized && processing_specialization)
3954 DECL_EXTERNAL (decl) = 1;
3957 if (DECL_EXTERNAL (decl) && ! DECL_TEMPLATE_SPECIALIZATION (decl))
3958 pedwarn ("declaration of %q#D outside of class is not definition",
3962 was_public = TREE_PUBLIC (decl);
3964 /* Enter this declaration into the symbol table. */
3965 tem = maybe_push_decl (decl);
3967 if (processing_template_decl)
3968 tem = push_template_decl (tem);
3969 if (tem == error_mark_node)
3970 return error_mark_node;
3972 /* Tell the back end to use or not use .common as appropriate. If we say
3973 -fconserve-space, we want this to save .data space, at the expense of
3974 wrong semantics. If we say -fno-conserve-space, we want this to
3975 produce errors about redefs; to do this we force variables into the
3977 if (flag_conserve_space
3978 && TREE_CODE (tem) == VAR_DECL
3979 && TREE_PUBLIC (tem)
3980 && !DECL_THREAD_LOCAL_P (tem)
3981 && !have_global_bss_p ())
3982 DECL_COMMON (tem) = 1;
3984 if (TREE_CODE (tem) == VAR_DECL
3985 && DECL_NAMESPACE_SCOPE_P (tem) && !TREE_PUBLIC (tem) && !was_public
3986 && !DECL_THIS_STATIC (tem) && !DECL_ARTIFICIAL (tem))
3988 /* This is a const variable with implicit 'static'. Set
3989 DECL_THIS_STATIC so we can tell it from variables that are
3990 !TREE_PUBLIC because of the anonymous namespace. */
3991 gcc_assert (cp_type_readonly (TREE_TYPE (tem)));
3992 DECL_THIS_STATIC (tem) = 1;
3995 if (!processing_template_decl && TREE_CODE (tem) == VAR_DECL)
3996 start_decl_1 (tem, initialized);
4002 start_decl_1 (tree decl, bool initialized)
4006 gcc_assert (!processing_template_decl);
4008 if (error_operand_p (decl))
4011 gcc_assert (TREE_CODE (decl) == VAR_DECL);
4012 type = TREE_TYPE (decl);
4015 /* Is it valid for this decl to have an initializer at all?
4016 If not, set INITIALIZED to zero, which will indirectly
4017 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
4019 /* Don't allow initializations for incomplete types except for
4020 arrays which might be completed by the initialization. */
4021 if (COMPLETE_TYPE_P (complete_type (type)))
4022 ; /* A complete type is ok. */
4023 else if (TREE_CODE (type) != ARRAY_TYPE)
4025 error ("variable %q#D has initializer but incomplete type", decl);
4027 type = TREE_TYPE (decl) = error_mark_node;
4029 else if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (type))))
4031 if (DECL_LANG_SPECIFIC (decl) && DECL_TEMPLATE_INFO (decl))
4032 error ("elements of array %q#D have incomplete type", decl);
4033 /* else we already gave an error in start_decl. */
4037 else if (IS_AGGR_TYPE (type)
4038 && ! DECL_EXTERNAL (decl))
4040 if (!COMPLETE_TYPE_P (complete_type (type)))
4042 error ("aggregate %q#D has incomplete type and cannot be defined",
4044 /* Change the type so that assemble_variable will give
4045 DECL an rtl we can live with: (mem (const_int 0)). */
4046 type = TREE_TYPE (decl) = error_mark_node;
4050 /* If any base type in the hierarchy of TYPE needs a constructor,
4051 then we set initialized to 1. This way any nodes which are
4052 created for the purposes of initializing this aggregate
4053 will live as long as it does. This is necessary for global
4054 aggregates which do not have their initializers processed until
4055 the end of the file. */
4056 initialized = TYPE_NEEDS_CONSTRUCTING (type);
4060 /* Create a new scope to hold this declaration if necessary.
4061 Whether or not a new scope is necessary cannot be determined
4062 until after the type has been completed; if the type is a
4063 specialization of a class template it is not until after
4064 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
4065 will be set correctly. */
4066 maybe_push_cleanup_level (type);
4069 /* Handle initialization of references. DECL, TYPE, and INIT have the
4070 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
4071 but will be set to a new CLEANUP_STMT if a temporary is created
4072 that must be destroyed subsequently.
4074 Returns an initializer expression to use to initialize DECL, or
4075 NULL if the initialization can be performed statically.
4077 Quotes on semantics can be found in ARM 8.4.3. */
4080 grok_reference_init (tree decl, tree type, tree init, tree *cleanup)
4084 if (init == NULL_TREE)
4086 if ((DECL_LANG_SPECIFIC (decl) == 0
4087 || DECL_IN_AGGR_P (decl) == 0)
4088 && ! DECL_THIS_EXTERN (decl))
4089 error ("%qD declared as reference but not initialized", decl);
4093 if (TREE_CODE (init) == CONSTRUCTOR)
4095 error ("ISO C++ forbids use of initializer list to "
4096 "initialize reference %qD", decl);
4100 if (TREE_CODE (init) == TREE_LIST)
4101 init = build_x_compound_expr_from_list (init, "initializer");
4103 if (TREE_CODE (TREE_TYPE (type)) != ARRAY_TYPE
4104 && TREE_CODE (TREE_TYPE (init)) == ARRAY_TYPE)
4105 /* Note: default conversion is only called in very special cases. */
4106 init = decay_conversion (init);
4108 /* Convert INIT to the reference type TYPE. This may involve the
4109 creation of a temporary, whose lifetime must be the same as that
4110 of the reference. If so, a DECL_EXPR for the temporary will be
4111 added just after the DECL_EXPR for DECL. That's why we don't set
4112 DECL_INITIAL for local references (instead assigning to them
4113 explicitly); we need to allow the temporary to be initialized
4115 tmp = initialize_reference (type, init, decl, cleanup);
4117 if (tmp == error_mark_node)
4119 else if (tmp == NULL_TREE)
4121 error ("cannot initialize %qT from %qT", type, TREE_TYPE (init));
4125 if (TREE_STATIC (decl) && !TREE_CONSTANT (tmp))
4128 DECL_INITIAL (decl) = tmp;
4133 /* Designated initializers in arrays are not supported in GNU C++.
4134 The parser cannot detect this error since it does not know whether
4135 a given brace-enclosed initializer is for a class type or for an
4136 array. This function checks that CE does not use a designated
4137 initializer. If it does, an error is issued. Returns true if CE
4138 is valid, i.e., does not have a designated initializer. */
4141 check_array_designated_initializer (const constructor_elt *ce)
4143 /* Designated initializers for array elements are not supported. */
4146 /* The parser only allows identifiers as designated
4148 gcc_assert (TREE_CODE (ce->index) == IDENTIFIER_NODE);
4149 error ("name %qD used in a GNU-style designated "
4150 "initializer for an array", ce->index);
4157 /* When parsing `int a[] = {1, 2};' we don't know the size of the
4158 array until we finish parsing the initializer. If that's the
4159 situation we're in, update DECL accordingly. */
4162 maybe_deduce_size_from_array_init (tree decl, tree init)
4164 tree type = TREE_TYPE (decl);
4166 if (TREE_CODE (type) == ARRAY_TYPE
4167 && TYPE_DOMAIN (type) == NULL_TREE
4168 && TREE_CODE (decl) != TYPE_DECL)
4170 /* do_default is really a C-ism to deal with tentative definitions.
4171 But let's leave it here to ease the eventual merge. */
4172 int do_default = !DECL_EXTERNAL (decl);
4173 tree initializer = init ? init : DECL_INITIAL (decl);
4176 /* Check that there are no designated initializers in INIT, as
4177 those are not supported in GNU C++, and as the middle-end
4178 will crash if presented with a non-numeric designated
4180 if (initializer && TREE_CODE (initializer) == CONSTRUCTOR)
4182 VEC(constructor_elt,gc) *v = CONSTRUCTOR_ELTS (initializer);
4183 constructor_elt *ce;
4186 VEC_iterate (constructor_elt, v, i, ce);
4188 if (!check_array_designated_initializer (ce))
4194 failure = cp_complete_array_type (&TREE_TYPE (decl), initializer,
4198 error ("initializer fails to determine size of %qD", decl);
4199 TREE_TYPE (decl) = error_mark_node;
4201 else if (failure == 2)
4205 error ("array size missing in %qD", decl);
4206 TREE_TYPE (decl) = error_mark_node;
4208 /* If a `static' var's size isn't known, make it extern as
4209 well as static, so it does not get allocated. If it's not
4210 `static', then don't mark it extern; finish_incomplete_decl
4211 will give it a default size and it will get allocated. */
4212 else if (!pedantic && TREE_STATIC (decl) && !TREE_PUBLIC (decl))
4213 DECL_EXTERNAL (decl) = 1;
4215 else if (failure == 3)
4217 error ("zero-size array %qD", decl);
4218 TREE_TYPE (decl) = error_mark_node;
4222 cp_apply_type_quals_to_decl (cp_type_quals (TREE_TYPE (decl)), decl);
4224 layout_decl (decl, 0);
4228 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
4229 any appropriate error messages regarding the layout. */
4232 layout_var_decl (tree decl)
4236 type = TREE_TYPE (decl);
4237 if (type == error_mark_node)
4240 /* If we haven't already layed out this declaration, do so now.
4241 Note that we must not call complete type for an external object
4242 because it's type might involve templates that we are not
4243 supposed to instantiate yet. (And it's perfectly valid to say
4244 `extern X x' for some incomplete type `X'.) */
4245 if (!DECL_EXTERNAL (decl))
4246 complete_type (type);
4247 if (!DECL_SIZE (decl)
4248 && TREE_TYPE (decl) != error_mark_node
4249 && (COMPLETE_TYPE_P (type)
4250 || (TREE_CODE (type) == ARRAY_TYPE
4251 && !TYPE_DOMAIN (type)
4252 && COMPLETE_TYPE_P (TREE_TYPE (type)))))
4253 layout_decl (decl, 0);
4255 if (!DECL_EXTERNAL (decl) && DECL_SIZE (decl) == NULL_TREE)
4257 /* An automatic variable with an incomplete type: that is an error.
4258 Don't talk about array types here, since we took care of that
4259 message in grokdeclarator. */
4260 error ("storage size of %qD isn't known", decl);
4261 TREE_TYPE (decl) = error_mark_node;
4264 /* Keep this code around in case we later want to control debug info
4265 based on whether a type is "used". (jason 1999-11-11) */
4267 else if (!DECL_EXTERNAL (decl) && IS_AGGR_TYPE (ttype))
4268 /* Let debugger know it should output info for this type. */
4269 note_debug_info_needed (ttype);
4271 if (TREE_STATIC (decl) && DECL_CLASS_SCOPE_P (decl))
4272 note_debug_info_needed (DECL_CONTEXT (decl));
4275 if ((DECL_EXTERNAL (decl) || TREE_STATIC (decl))
4276 && DECL_SIZE (decl) != NULL_TREE
4277 && ! TREE_CONSTANT (DECL_SIZE (decl)))
4279 if (TREE_CODE (DECL_SIZE (decl)) == INTEGER_CST)
4280 constant_expression_warning (DECL_SIZE (decl));
4282 error ("storage size of %qD isn't constant", decl);
4286 /* If a local static variable is declared in an inline function, or if
4287 we have a weak definition, we must endeavor to create only one
4288 instance of the variable at link-time. */
4291 maybe_commonize_var (tree decl)
4293 /* Static data in a function with comdat linkage also has comdat
4295 if (TREE_STATIC (decl)
4296 /* Don't mess with __FUNCTION__. */
4297 && ! DECL_ARTIFICIAL (decl)
4298 && DECL_FUNCTION_SCOPE_P (decl)
4299 /* Unfortunately, import_export_decl has not always been called
4300 before the function is processed, so we cannot simply check
4302 && (DECL_COMDAT (DECL_CONTEXT (decl))
4303 || ((DECL_DECLARED_INLINE_P (DECL_CONTEXT (decl))
4304 || DECL_TEMPLATE_INSTANTIATION (DECL_CONTEXT (decl)))
4305 && TREE_PUBLIC (DECL_CONTEXT (decl)))))
4309 /* With weak symbols, we simply make the variable COMDAT;
4310 that will cause copies in multiple translations units to
4312 comdat_linkage (decl);
4316 if (DECL_INITIAL (decl) == NULL_TREE
4317 || DECL_INITIAL (decl) == error_mark_node)
4319 /* Without weak symbols, we can use COMMON to merge
4320 uninitialized variables. */
4321 TREE_PUBLIC (decl) = 1;
4322 DECL_COMMON (decl) = 1;
4326 /* While for initialized variables, we must use internal
4327 linkage -- which means that multiple copies will not
4329 TREE_PUBLIC (decl) = 0;
4330 DECL_COMMON (decl) = 0;
4331 warning (0, "sorry: semantics of inline function static "
4332 "data %q+#D are wrong (you'll wind up "
4333 "with multiple copies)", decl);
4334 warning (0, "%J you can work around this by removing "
4340 else if (DECL_LANG_SPECIFIC (decl) && DECL_COMDAT (decl))
4341 /* Set it up again; we might have set DECL_INITIAL since the last
4343 comdat_linkage (decl);
4346 /* Issue an error message if DECL is an uninitialized const variable. */
4349 check_for_uninitialized_const_var (tree decl)
4351 tree type = TREE_TYPE (decl);
4353 /* ``Unless explicitly declared extern, a const object does not have
4354 external linkage and must be initialized. ($8.4; $12.1)'' ARM
4356 if (TREE_CODE (decl) == VAR_DECL
4357 && TREE_CODE (type) != REFERENCE_TYPE
4358 && CP_TYPE_CONST_P (type)
4359 && !TYPE_NEEDS_CONSTRUCTING (type)
4360 && !DECL_INITIAL (decl))
4361 error ("uninitialized const %qD", decl);
4365 /* Structure holding the current initializer being processed by reshape_init.
4366 CUR is a pointer to the current element being processed, END is a pointer
4367 after the last element present in the initializer. */
4368 typedef struct reshape_iterator_t
4370 constructor_elt *cur;
4371 constructor_elt *end;
4374 static tree reshape_init_r (tree, reshape_iter *, bool);
4376 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
4377 returned is the next FIELD_DECL (possibly FIELD itself) that can be
4378 initialized. If there are no more such fields, the return value
4382 next_initializable_field (tree field)
4385 && (TREE_CODE (field) != FIELD_DECL
4386 || (DECL_C_BIT_FIELD (field) && !DECL_NAME (field))
4387 || DECL_ARTIFICIAL (field)))
4388 field = TREE_CHAIN (field);
4393 /* Subroutine of reshape_init_array and reshape_init_vector, which does
4394 the actual work. ELT_TYPE is the element type of the array. MAX_INDEX is an
4395 INTEGER_CST representing the size of the array minus one (the maximum index),
4396 or NULL_TREE if the array was declared without specifying the size. D is
4397 the iterator within the constructor. */
4400 reshape_init_array_1 (tree elt_type, tree max_index, reshape_iter *d)
4403 bool sized_array_p = (max_index != NULL_TREE);
4404 unsigned HOST_WIDE_INT max_index_cst = 0;
4405 unsigned HOST_WIDE_INT index;
4407 /* The initializer for an array is always a CONSTRUCTOR. */
4408 new_init = build_constructor (NULL_TREE, NULL);
4412 /* Minus 1 is used for zero sized arrays. */
4413 if (integer_all_onesp (max_index))
4416 if (host_integerp (max_index, 1))
4417 max_index_cst = tree_low_cst (max_index, 1);
4418 /* sizetype is sign extended, not zero extended. */
4420 max_index_cst = tree_low_cst (fold_convert (size_type_node, max_index),
4424 /* Loop until there are no more initializers. */
4426 d->cur != d->end && (!sized_array_p || index <= max_index_cst);
4431 check_array_designated_initializer (d->cur);
4432 elt_init = reshape_init_r (elt_type, d, /*first_initializer_p=*/false);
4433 if (elt_init == error_mark_node)
4434 return error_mark_node;
4435 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init), NULL_TREE, elt_init);
4441 /* Subroutine of reshape_init_r, processes the initializers for arrays.
4442 Parameters are the same of reshape_init_r. */
4445 reshape_init_array (tree type, reshape_iter *d)
4447 tree max_index = NULL_TREE;
4449 gcc_assert (TREE_CODE (type) == ARRAY_TYPE);
4451 if (TYPE_DOMAIN (type))
4452 max_index = array_type_nelts (type);
4454 return reshape_init_array_1 (TREE_TYPE (type), max_index, d);
4457 /* Subroutine of reshape_init_r, processes the initializers for vectors.
4458 Parameters are the same of reshape_init_r. */
4461 reshape_init_vector (tree type, reshape_iter *d)
4463 tree max_index = NULL_TREE;
4466 gcc_assert (TREE_CODE (type) == VECTOR_TYPE);
4468 if (COMPOUND_LITERAL_P (d->cur->value))
4470 tree value = d->cur->value;
4471 if (!same_type_p (TREE_TYPE (value), type))
4473 error ("invalid type %qT as initializer for a vector of type %qT",
4474 TREE_TYPE (d->cur->value), type);
4475 value = error_mark_node;
4481 /* For a vector, the representation type is a struct
4482 containing a single member which is an array of the
4483 appropriate size. */
4484 rtype = TYPE_DEBUG_REPRESENTATION_TYPE (type);
4485 if (rtype && TYPE_DOMAIN (TREE_TYPE (TYPE_FIELDS (rtype))))
4486 max_index = array_type_nelts (TREE_TYPE (TYPE_FIELDS (rtype)));
4488 return reshape_init_array_1 (TREE_TYPE (type), max_index, d);
4491 /* Subroutine of reshape_init_r, processes the initializers for classes
4492 or union. Parameters are the same of reshape_init_r. */
4495 reshape_init_class (tree type, reshape_iter *d, bool first_initializer_p)
4500 gcc_assert (CLASS_TYPE_P (type));
4502 /* The initializer for a class is always a CONSTRUCTOR. */
4503 new_init = build_constructor (NULL_TREE, NULL);
4504 field = next_initializable_field (TYPE_FIELDS (type));
4510 An initializer for an aggregate member that is an
4511 empty class shall have the form of an empty
4512 initializer-list {}. */
4513 if (!first_initializer_p)
4515 error ("initializer for %qT must be brace-enclosed", type);
4516 return error_mark_node;
4521 /* Loop through the initializable fields, gathering initializers. */
4522 while (d->cur != d->end)
4526 /* Handle designated initializers, as an extension. */
4529 field = lookup_field_1 (type, d->cur->index, /*want_type=*/false);
4531 if (!field || TREE_CODE (field) != FIELD_DECL)
4533 error ("%qT has no non-static data member named %qD", type,
4535 return error_mark_node;
4539 /* If we processed all the member of the class, we are done. */
4543 field_init = reshape_init_r (TREE_TYPE (field), d,
4544 /*first_initializer_p=*/false);
4545 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init), field, field_init);
4549 When a union is initialized with a brace-enclosed
4550 initializer, the braces shall only contain an
4551 initializer for the first member of the union. */
4552 if (TREE_CODE (type) == UNION_TYPE)
4555 field = next_initializable_field (TREE_CHAIN (field));
4561 /* Subroutine of reshape_init, which processes a single initializer (part of
4562 a CONSTRUCTOR). TYPE is the type of the variable being initialized, D is the
4563 iterator within the CONSTRUCTOR which points to the initializer to process.
4564 FIRST_INITIALIZER_P is true if this is the first initializer of the
4565 CONSTRUCTOR node. */
4568 reshape_init_r (tree type, reshape_iter *d, bool first_initializer_p)
4570 tree init = d->cur->value;
4572 /* A non-aggregate type is always initialized with a single
4574 if (!CP_AGGREGATE_TYPE_P (type))
4576 /* It is invalid to initialize a non-aggregate type with a
4577 brace-enclosed initializer.
4578 We need to check for BRACE_ENCLOSED_INITIALIZER_P here because
4579 of g++.old-deja/g++.mike/p7626.C: a pointer-to-member constant is
4580 a CONSTRUCTOR (with a record type). */
4581 if (TREE_CODE (init) == CONSTRUCTOR
4582 && BRACE_ENCLOSED_INITIALIZER_P (init)) /* p7626.C */
4584 error ("braces around scalar initializer for type %qT", type);
4585 init = error_mark_node;
4594 All implicit type conversions (clause _conv_) are considered when
4595 initializing the aggregate member with an initializer from an
4596 initializer-list. If the initializer can initialize a member,
4597 the member is initialized. Otherwise, if the member is itself a
4598 non-empty subaggregate, brace elision is assumed and the
4599 initializer is considered for the initialization of the first
4600 member of the subaggregate. */
4601 if (TREE_CODE (init) != CONSTRUCTOR
4602 && can_convert_arg (type, TREE_TYPE (init), init, LOOKUP_NORMAL))
4608 /* [dcl.init.string]
4610 A char array (whether plain char, signed char, or unsigned char)
4611 can be initialized by a string-literal (optionally enclosed in
4612 braces); a wchar_t array can be initialized by a wide
4613 string-literal (optionally enclosed in braces). */
4614 if (TREE_CODE (type) == ARRAY_TYPE
4615 && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type))))
4617 tree str_init = init;
4619 /* Strip one level of braces if and only if they enclose a single
4620 element (as allowed by [dcl.init.string]). */
4621 if (!first_initializer_p
4622 && TREE_CODE (str_init) == CONSTRUCTOR
4623 && VEC_length (constructor_elt, CONSTRUCTOR_ELTS (str_init)) == 1)
4625 str_init = VEC_index (constructor_elt,
4626 CONSTRUCTOR_ELTS (str_init), 0)->value;
4629 /* If it's a string literal, then it's the initializer for the array
4630 as a whole. Otherwise, continue with normal initialization for
4631 array types (one value per array element). */
4632 if (TREE_CODE (str_init) == STRING_CST)
4639 /* The following cases are about aggregates. If we are not within a full
4640 initializer already, and there is not a CONSTRUCTOR, it means that there
4641 is a missing set of braces (that is, we are processing the case for
4642 which reshape_init exists). */
4643 if (!first_initializer_p)
4645 if (TREE_CODE (init) == CONSTRUCTOR)
4647 if (TREE_TYPE (init) && TYPE_PTRMEMFUNC_P (TREE_TYPE (init)))
4648 /* There is no need to reshape pointer-to-member function
4649 initializers, as they are always constructed correctly
4650 by the front end. */
4652 else if (COMPOUND_LITERAL_P (init))
4653 /* For a nested compound literal, there is no need to reshape since
4654 brace elision is not allowed. Even if we decided to allow it,
4655 we should add a call to reshape_init in finish_compound_literal,
4656 before calling digest_init, so changing this code would still
4657 not be necessary. */
4658 gcc_assert (!BRACE_ENCLOSED_INITIALIZER_P (init));
4662 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init));
4663 return reshape_init (type, init);
4667 warning (OPT_Wmissing_braces, "missing braces around initializer for %qT",
4671 /* Dispatch to specialized routines. */
4672 if (CLASS_TYPE_P (type))
4673 return reshape_init_class (type, d, first_initializer_p);
4674 else if (TREE_CODE (type) == ARRAY_TYPE)
4675 return reshape_init_array (type, d);
4676 else if (TREE_CODE (type) == VECTOR_TYPE)
4677 return reshape_init_vector (type, d);
4682 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
4683 brace-enclosed aggregate initializer.
4685 INIT is the CONSTRUCTOR containing the list of initializers describing
4686 a brace-enclosed initializer for an entity of the indicated aggregate TYPE.
4687 It may not presently match the shape of the TYPE; for example:
4689 struct S { int a; int b; };
4690 struct S a[] = { 1, 2, 3, 4 };
4692 Here INIT will hold a VEC of four elements, rather than a
4693 VEC of two elements, each itself a VEC of two elements. This
4694 routine transforms INIT from the former form into the latter. The
4695 revised CONSTRUCTOR node is returned. */
4698 reshape_init (tree type, tree init)
4700 VEC(constructor_elt, gc) *v;
4704 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init));
4706 v = CONSTRUCTOR_ELTS (init);
4708 /* An empty constructor does not need reshaping, and it is always a valid
4710 if (VEC_empty (constructor_elt, v))
4713 /* Recurse on this CONSTRUCTOR. */
4714 d.cur = VEC_index (constructor_elt, v, 0);
4715 d.end = d.cur + VEC_length (constructor_elt, v);
4717 new_init = reshape_init_r (type, &d, true);
4718 if (new_init == error_mark_node)
4719 return error_mark_node;
4721 /* Make sure all the element of the constructor were used. Otherwise,
4722 issue an error about exceeding initializers. */
4724 error ("too many initializers for %qT", type);
4729 /* Verify INIT (the initializer for DECL), and record the
4730 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
4731 grok_reference_init.
4733 If the return value is non-NULL, it is an expression that must be
4734 evaluated dynamically to initialize DECL. */
4737 check_initializer (tree decl, tree init, int flags, tree *cleanup)
4739 tree type = TREE_TYPE (decl);
4740 tree init_code = NULL;
4742 /* Things that are going to be initialized need to have complete
4744 TREE_TYPE (decl) = type = complete_type (TREE_TYPE (decl));
4746 if (type == error_mark_node)
4747 /* We will have already complained. */
4750 if (TREE_CODE (type) == ARRAY_TYPE)
4752 tree element_type = TREE_TYPE (type);
4754 /* The array type itself need not be complete, because the
4755 initializer may tell us how many elements are in the array.
4756 But, the elements of the array must be complete. */
4757 if (!COMPLETE_TYPE_P (complete_type (element_type)))
4759 error ("elements of array %q#D have incomplete type", decl);
4762 /* It is not valid to initialize a VLA. */
4764 && ((COMPLETE_TYPE_P (type) && !TREE_CONSTANT (TYPE_SIZE (type)))
4765 || !TREE_CONSTANT (TYPE_SIZE (element_type))))
4767 error ("variable-sized object %qD may not be initialized", decl);
4771 else if (!COMPLETE_TYPE_P (type))
4773 error ("%qD has incomplete type", decl);
4774 TREE_TYPE (decl) = error_mark_node;
4778 /* There is no way to make a variable-sized class type in GNU C++. */
4779 gcc_assert (TREE_CONSTANT (TYPE_SIZE (type)));
4781 if (!CP_AGGREGATE_TYPE_P (type)
4782 && init && BRACE_ENCLOSED_INITIALIZER_P (init)
4783 && VEC_length (constructor_elt, CONSTRUCTOR_ELTS (init)) != 1)
4785 error ("scalar object %qD requires one element in initializer", decl);
4786 TREE_TYPE (decl) = error_mark_node;
4790 if (TREE_CODE (decl) == CONST_DECL)
4792 gcc_assert (TREE_CODE (type) != REFERENCE_TYPE);
4794 DECL_INITIAL (decl) = init;
4796 gcc_assert (init != NULL_TREE);
4799 else if (!DECL_EXTERNAL (decl) && TREE_CODE (type) == REFERENCE_TYPE)
4800 init = grok_reference_init (decl, type, init, cleanup);
4803 /* Do not reshape constructors of vectors (they don't need to be
4805 if (TREE_CODE (init) == CONSTRUCTOR
4806 && !COMPOUND_LITERAL_P (init)
4807 && !TREE_TYPE (init)) /* ptrmemfunc */
4809 init = reshape_init (type, init);
4811 if ((*targetm.vector_opaque_p) (type))
4813 error ("opaque vector types cannot be initialized");
4814 init = error_mark_node;
4818 /* If DECL has an array type without a specific bound, deduce the
4819 array size from the initializer. */
4820 maybe_deduce_size_from_array_init (decl, init);
4821 type = TREE_TYPE (decl);
4822 if (type == error_mark_node)
4825 if (TYPE_HAS_CONSTRUCTOR (type) || TYPE_NEEDS_CONSTRUCTING (type))
4827 if (TREE_CODE (type) == ARRAY_TYPE)
4828 goto initialize_aggr;
4829 else if (TREE_CODE (init) == CONSTRUCTOR)
4831 if (TYPE_NON_AGGREGATE_CLASS (type))
4833 error ("%qD must be initialized by constructor, "
4836 init = error_mark_node;
4839 goto dont_use_constructor;
4843 int saved_stmts_are_full_exprs_p;
4846 saved_stmts_are_full_exprs_p = 0;
4847 if (building_stmt_tree ())
4849 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
4850 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
4852 init = build_aggr_init (decl, init, flags);
4853 if (building_stmt_tree ())
4854 current_stmt_tree ()->stmts_are_full_exprs_p =
4855 saved_stmts_are_full_exprs_p;
4861 dont_use_constructor:
4862 if (TREE_CODE (init) != TREE_VEC)
4864 init_code = store_init_value (decl, init);
4865 if (pedantic && TREE_CODE (type) == ARRAY_TYPE
4866 && DECL_INITIAL (decl)
4867 && TREE_CODE (DECL_INITIAL (decl)) == STRING_CST
4868 && PAREN_STRING_LITERAL_P (DECL_INITIAL (decl)))
4869 warning (0, "array %qD initialized by parenthesized string literal %qE",
4870 decl, DECL_INITIAL (decl));
4875 else if (DECL_EXTERNAL (decl))
4877 else if (TYPE_P (type) && TYPE_NEEDS_CONSTRUCTING (type))
4878 goto initialize_aggr;
4879 else if (IS_AGGR_TYPE (type))
4881 tree core_type = strip_array_types (type);
4883 if (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type))
4884 error ("structure %qD with uninitialized const members", decl);
4885 if (CLASSTYPE_REF_FIELDS_NEED_INIT (core_type))
4886 error ("structure %qD with uninitialized reference members", decl);
4888 check_for_uninitialized_const_var (decl);
4891 check_for_uninitialized_const_var (decl);
4893 if (init && init != error_mark_node)
4894 init_code = build2 (INIT_EXPR, type, decl, init);
4899 /* If DECL is not a local variable, give it RTL. */
4902 make_rtl_for_nonlocal_decl (tree decl, tree init, const char* asmspec)
4904 int toplev = toplevel_bindings_p ();
4906 const char *filename;
4908 /* Set the DECL_ASSEMBLER_NAME for the object. */
4911 /* The `register' keyword, when used together with an
4912 asm-specification, indicates that the variable should be
4913 placed in a particular register. */
4914 if (TREE_CODE (decl) == VAR_DECL && DECL_REGISTER (decl))
4916 set_user_assembler_name (decl, asmspec);
4917 DECL_HARD_REGISTER (decl) = 1;
4921 if (TREE_CODE (decl) == FUNCTION_DECL
4922 && DECL_BUILT_IN_CLASS (decl) == BUILT_IN_NORMAL)
4923 set_builtin_user_assembler_name (decl, asmspec);
4924 set_user_assembler_name (decl, asmspec);
4928 /* Handle non-variables up front. */
4929 if (TREE_CODE (decl) != VAR_DECL)
4931 rest_of_decl_compilation (decl, toplev, at_eof);
4935 /* If we see a class member here, it should be a static data
4937 if (DECL_LANG_SPECIFIC (decl) && DECL_IN_AGGR_P (decl))
4939 gcc_assert (TREE_STATIC (decl));
4940 /* An in-class declaration of a static data member should be
4941 external; it is only a declaration, and not a definition. */
4942 if (init == NULL_TREE)
4943 gcc_assert (DECL_EXTERNAL (decl));
4946 /* We don't create any RTL for local variables. */
4947 if (DECL_FUNCTION_SCOPE_P (decl) && !TREE_STATIC (decl))
4950 /* We defer emission of local statics until the corresponding
4951 DECL_EXPR is expanded. */
4952 defer_p = DECL_FUNCTION_SCOPE_P (decl) || DECL_VIRTUAL_P (decl);
4954 /* We try to defer namespace-scope static constants so that they are
4955 not emitted into the object file unnecessarily. */
4956 filename = input_filename;
4957 if (!DECL_VIRTUAL_P (decl)
4958 && TREE_READONLY (decl)
4959 && DECL_INITIAL (decl) != NULL_TREE
4960 && DECL_INITIAL (decl) != error_mark_node
4962 && ! EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl))
4964 && !TREE_PUBLIC (decl))
4966 /* Fool with the linkage of static consts according to #pragma
4968 struct c_fileinfo *finfo = get_fileinfo (filename);
4969 if (!finfo->interface_unknown && !TREE_PUBLIC (decl))
4971 TREE_PUBLIC (decl) = 1;
4972 DECL_EXTERNAL (decl) = finfo->interface_only;
4977 /* Likewise for template instantiations. */
4978 else if (DECL_LANG_SPECIFIC (decl)
4979 && DECL_IMPLICIT_INSTANTIATION (decl))
4982 /* If we're not deferring, go ahead and assemble the variable. */
4984 rest_of_decl_compilation (decl, toplev, at_eof);
4987 /* Generate code to initialize DECL (a local variable). */
4990 initialize_local_var (tree decl, tree init)
4992 tree type = TREE_TYPE (decl);
4995 gcc_assert (TREE_CODE (decl) == VAR_DECL
4996 || TREE_CODE (decl) == RESULT_DECL);
4997 gcc_assert (!TREE_STATIC (decl));
4999 if (DECL_SIZE (decl) == NULL_TREE)
5001 /* If we used it already as memory, it must stay in memory. */
5002 DECL_INITIAL (decl) = NULL_TREE;
5003 TREE_ADDRESSABLE (decl) = TREE_USED (decl);
5006 if (DECL_SIZE (decl) && type != error_mark_node)
5010 /* Compute and store the initial value. */
5011 already_used = TREE_USED (decl) || TREE_USED (type);
5013 /* Perform the initialization. */
5016 int saved_stmts_are_full_exprs_p;
5018 gcc_assert (building_stmt_tree ());
5019 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
5020 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
5021 finish_expr_stmt (init);
5022 current_stmt_tree ()->stmts_are_full_exprs_p =
5023 saved_stmts_are_full_exprs_p;
5026 /* Set this to 0 so we can tell whether an aggregate which was
5027 initialized was ever used. Don't do this if it has a
5028 destructor, so we don't complain about the 'resource
5029 allocation is initialization' idiom. Now set
5030 attribute((unused)) on types so decls of that type will be
5031 marked used. (see TREE_USED, above.) */
5032 if (TYPE_NEEDS_CONSTRUCTING (type)
5034 && TYPE_HAS_TRIVIAL_DESTRUCTOR (type)
5035 && DECL_NAME (decl))
5036 TREE_USED (decl) = 0;
5037 else if (already_used)
5038 TREE_USED (decl) = 1;
5041 /* Generate a cleanup, if necessary. */
5042 cleanup = cxx_maybe_build_cleanup (decl);
5043 if (DECL_SIZE (decl) && cleanup)
5044 finish_decl_cleanup (decl, cleanup);
5047 /* DECL is a VAR_DECL for a compiler-generated variable with static
5048 storage duration (like a virtual table) whose initializer is a
5049 compile-time constant. INIT must be either a TREE_LIST of values,
5050 or a CONSTRUCTOR. Initialize the variable and provide it to the
5054 initialize_artificial_var (tree decl, tree init)
5056 gcc_assert (DECL_ARTIFICIAL (decl));
5057 if (TREE_CODE (init) == TREE_LIST)
5058 init = build_constructor_from_list (NULL_TREE, init);
5059 gcc_assert (TREE_CODE (init) == CONSTRUCTOR);
5060 DECL_INITIAL (decl) = init;
5061 DECL_INITIALIZED_P (decl) = 1;
5062 determine_visibility (decl);
5063 layout_var_decl (decl);
5064 maybe_commonize_var (decl);
5065 make_rtl_for_nonlocal_decl (decl, init, /*asmspec=*/NULL);
5068 /* Finish processing of a declaration;
5069 install its line number and initial value.
5070 If the length of an array type is not known before,
5071 it must be determined now, from the initial value, or it is an error.
5073 INIT is the initializer (if any) for DECL. If INIT_CONST_EXPR_P is
5074 true, then INIT is an integral constant expression.
5076 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
5077 if the (init) syntax was used. */
5080 cp_finish_decl (tree decl, tree init, bool init_const_expr_p,
5081 tree asmspec_tree, int flags)
5085 const char *asmspec = NULL;
5086 int was_readonly = 0;
5087 bool var_definition_p = false;
5088 int saved_processing_template_decl;
5090 if (decl == error_mark_node)
5095 error ("assignment (not initialization) in declaration");
5099 gcc_assert (TREE_CODE (decl) != RESULT_DECL);
5100 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
5101 gcc_assert (TREE_CODE (decl) != PARM_DECL);
5103 type = TREE_TYPE (decl);
5104 if (type == error_mark_node)
5107 /* Assume no cleanup is required. */
5108 cleanup = NULL_TREE;
5109 saved_processing_template_decl = processing_template_decl;
5111 /* If a name was specified, get the string. */
5112 if (global_scope_p (current_binding_level))
5113 asmspec_tree = maybe_apply_renaming_pragma (decl, asmspec_tree);
5114 if (asmspec_tree && asmspec_tree != error_mark_node)
5115 asmspec = TREE_STRING_POINTER (asmspec_tree);
5117 if (current_class_type
5118 && CP_DECL_CONTEXT (decl) == current_class_type
5119 && TYPE_BEING_DEFINED (current_class_type)
5120 && (DECL_INITIAL (decl) || init))
5121 DECL_INITIALIZED_IN_CLASS_P (decl) = 1;
5123 if (processing_template_decl)
5125 bool type_dependent_p;
5127 /* Add this declaration to the statement-tree. */
5128 if (at_function_scope_p ())
5129 add_decl_expr (decl);
5131 type_dependent_p = dependent_type_p (type);
5133 if (init && init_const_expr_p)
5135 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl) = 1;
5136 if (DECL_INTEGRAL_CONSTANT_VAR_P (decl))
5137 TREE_CONSTANT (decl) = 1;
5141 || !DECL_CLASS_SCOPE_P (decl)
5142 || !DECL_INTEGRAL_CONSTANT_VAR_P (decl)
5144 || value_dependent_expression_p (init)
5145 /* Check also if initializer is a value dependent
5146 { integral_constant_expression }. */
5147 || (TREE_CODE (init) == CONSTRUCTOR
5148 && VEC_length (constructor_elt, CONSTRUCTOR_ELTS (init)) == 1
5149 && value_dependent_expression_p
5150 (VEC_index (constructor_elt,
5151 CONSTRUCTOR_ELTS (init), 0)->value)))
5154 DECL_INITIAL (decl) = init;
5155 if (TREE_CODE (decl) == VAR_DECL
5156 && !DECL_PRETTY_FUNCTION_P (decl)
5157 && !type_dependent_p)
5158 maybe_deduce_size_from_array_init (decl, init);
5162 init = fold_non_dependent_expr (init);
5163 processing_template_decl = 0;
5166 /* Take care of TYPE_DECLs up front. */
5167 if (TREE_CODE (decl) == TYPE_DECL)
5169 if (type != error_mark_node
5170 && IS_AGGR_TYPE (type) && DECL_NAME (decl))
5172 if (TREE_TYPE (DECL_NAME (decl)) && TREE_TYPE (decl) != type)
5173 warning (0, "shadowing previous type declaration of %q#D", decl);
5174 set_identifier_type_value (DECL_NAME (decl), decl);
5177 /* If we have installed this as the canonical typedef for this
5178 type, and that type has not been defined yet, delay emitting
5179 the debug information for it, as we will emit it later. */
5180 if (TYPE_MAIN_DECL (TREE_TYPE (decl)) == decl
5181 && !COMPLETE_TYPE_P (TREE_TYPE (decl)))
5182 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
5184 rest_of_decl_compilation (decl, DECL_CONTEXT (decl) == NULL_TREE,
5189 /* A reference will be modified here, as it is initialized. */
5190 if (! DECL_EXTERNAL (decl)
5191 && TREE_READONLY (decl)
5192 && TREE_CODE (type) == REFERENCE_TYPE)
5195 TREE_READONLY (decl) = 0;
5198 if (TREE_CODE (decl) == VAR_DECL)
5200 /* Only PODs can have thread-local storage. Other types may require
5201 various kinds of non-trivial initialization. */
5202 if (DECL_THREAD_LOCAL_P (decl) && !pod_type_p (TREE_TYPE (decl)))
5203 error ("%qD cannot be thread-local because it has non-POD type %qT",
5204 decl, TREE_TYPE (decl));
5205 /* If this is a local variable that will need a mangled name,
5206 register it now. We must do this before processing the
5207 initializer for the variable, since the initialization might
5208 require a guard variable, and since the mangled name of the
5209 guard variable will depend on the mangled name of this
5211 if (!processing_template_decl
5212 && DECL_FUNCTION_SCOPE_P (decl)
5213 && TREE_STATIC (decl)
5214 && !DECL_ARTIFICIAL (decl))
5215 push_local_name (decl);
5216 /* Convert the initializer to the type of DECL, if we have not
5217 already initialized DECL. */
5218 if (!DECL_INITIALIZED_P (decl)
5219 /* If !DECL_EXTERNAL then DECL is being defined. In the
5220 case of a static data member initialized inside the
5221 class-specifier, there can be an initializer even if DECL
5222 is *not* defined. */
5223 && (!DECL_EXTERNAL (decl) || init))
5227 DECL_NONTRIVIALLY_INITIALIZED_P (decl) = 1;
5228 if (init_const_expr_p)
5230 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl) = 1;
5231 if (DECL_INTEGRAL_CONSTANT_VAR_P (decl))
5232 TREE_CONSTANT (decl) = 1;
5235 init = check_initializer (decl, init, flags, &cleanup);
5236 /* Thread-local storage cannot be dynamically initialized. */
5237 if (DECL_THREAD_LOCAL_P (decl) && init)
5239 error ("%qD is thread-local and so cannot be dynamically "
5240 "initialized", decl);
5244 /* Check that the initializer for a static data member was a
5245 constant. Although we check in the parser that the
5246 initializer is an integral constant expression, we do not
5247 simplify division-by-zero at the point at which it
5248 occurs. Therefore, in:
5250 struct S { static const int i = 7 / 0; };
5252 we issue an error at this point. It would
5253 probably be better to forbid division by zero in
5254 integral constant expressions. */
5255 if (DECL_EXTERNAL (decl) && init)
5257 error ("%qD cannot be initialized by a non-constant expression"
5258 " when being declared", decl);
5259 DECL_INITIALIZED_IN_CLASS_P (decl) = 0;
5267 The memory occupied by any object of static storage
5268 duration is zero-initialized at program startup before
5269 any other initialization takes place.
5271 We cannot create an appropriate initializer until after
5272 the type of DECL is finalized. If DECL_INITIAL is set,
5273 then the DECL is statically initialized, and any
5274 necessary zero-initialization has already been performed. */
5275 if (TREE_STATIC (decl) && !DECL_INITIAL (decl))
5276 DECL_INITIAL (decl) = build_zero_init (TREE_TYPE (decl),
5277 /*nelts=*/NULL_TREE,
5278 /*static_storage_p=*/true);
5279 /* Remember that the initialization for this variable has
5281 DECL_INITIALIZED_P (decl) = 1;
5282 /* This declaration is the definition of this variable,
5283 unless we are initializing a static data member within
5284 the class specifier. */
5285 if (!DECL_EXTERNAL (decl))
5286 var_definition_p = true;
5288 /* If the variable has an array type, lay out the type, even if
5289 there is no initializer. It is valid to index through the
5290 array, and we must get TYPE_ALIGN set correctly on the array
5292 else if (TREE_CODE (type) == ARRAY_TYPE)
5296 /* Add this declaration to the statement-tree. This needs to happen
5297 after the call to check_initializer so that the DECL_EXPR for a
5298 reference temp is added before the DECL_EXPR for the reference itself. */
5299 if (at_function_scope_p ())
5300 add_decl_expr (decl);
5302 /* Let the middle end know about variables and functions -- but not
5303 static data members in uninstantiated class templates. */
5304 if (!saved_processing_template_decl
5305 && (TREE_CODE (decl) == VAR_DECL
5306 || TREE_CODE (decl) == FUNCTION_DECL))
5308 if (TREE_CODE (decl) == VAR_DECL)
5310 layout_var_decl (decl);
5311 maybe_commonize_var (decl);
5314 make_rtl_for_nonlocal_decl (decl, init, asmspec);
5316 /* Check for abstractness of the type. Notice that there is no
5317 need to strip array types here since the check for those types
5318 is already done within create_array_type_for_decl. */
5319 if (TREE_CODE (type) == FUNCTION_TYPE
5320 || TREE_CODE (type) == METHOD_TYPE)
5321 abstract_virtuals_error (decl, TREE_TYPE (type));
5323 abstract_virtuals_error (decl, type);
5325 /* This needs to happen after the linkage is set. */
5326 determine_visibility (decl);
5328 if (TREE_CODE (decl) == FUNCTION_DECL
5329 || TREE_TYPE (decl) == error_mark_node)
5330 /* No initialization required. */
5332 else if (DECL_EXTERNAL (decl)
5333 && ! (DECL_LANG_SPECIFIC (decl)
5334 && DECL_NOT_REALLY_EXTERN (decl)))
5337 DECL_INITIAL (decl) = init;
5341 /* A variable definition. */
5342 if (DECL_FUNCTION_SCOPE_P (decl))
5344 /* Initialize the local variable. */
5345 if (processing_template_decl)
5346 DECL_INITIAL (decl) = init;
5347 else if (!TREE_STATIC (decl))
5348 initialize_local_var (decl, init);
5351 /* If a variable is defined, and then a subsequent
5352 definition with external linkage is encountered, we will
5353 get here twice for the same variable. We want to avoid
5354 calling expand_static_init more than once. For variables
5355 that are not static data members, we can call
5356 expand_static_init only when we actually process the
5357 initializer. It is not legal to redeclare a static data
5358 member, so this issue does not arise in that case. */
5359 if (var_definition_p && TREE_STATIC (decl))
5361 /* If a TREE_READONLY variable needs initialization
5362 at runtime, it is no longer readonly and we need to
5363 avoid MEM_READONLY_P being set on RTL created for it. */
5366 if (TREE_READONLY (decl))
5367 TREE_READONLY (decl) = 0;
5370 expand_static_init (decl, init);
5375 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
5376 reference, insert it in the statement-tree now. */
5378 push_cleanup (decl, cleanup, false);
5381 processing_template_decl = saved_processing_template_decl;
5384 TREE_READONLY (decl) = 1;
5386 /* If this was marked 'used', be sure it will be output. */
5387 if (lookup_attribute ("used", DECL_ATTRIBUTES (decl)))
5388 mark_decl_referenced (decl);
5391 /* This is here for a midend callback from c-common.c. */
5394 finish_decl (tree decl, tree init, tree asmspec_tree)
5396 cp_finish_decl (decl, init, /*init_const_expr_p=*/false, asmspec_tree, 0);
5399 /* Returns a declaration for a VAR_DECL as if:
5401 extern "C" TYPE NAME;
5403 had been seen. Used to create compiler-generated global
5407 declare_global_var (tree name, tree type)
5411 push_to_top_level ();
5412 decl = build_decl (VAR_DECL, name, type);
5413 TREE_PUBLIC (decl) = 1;
5414 DECL_EXTERNAL (decl) = 1;
5415 DECL_ARTIFICIAL (decl) = 1;
5416 /* If the user has explicitly declared this variable (perhaps
5417 because the code we are compiling is part of a low-level runtime
5418 library), then it is possible that our declaration will be merged
5419 with theirs by pushdecl. */
5420 decl = pushdecl (decl);
5421 finish_decl (decl, NULL_TREE, NULL_TREE);
5422 pop_from_top_level ();
5427 /* Returns a pointer to the `atexit' function. Note that if
5428 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
5429 `__cxa_atexit' function specified in the IA64 C++ ABI. */
5432 get_atexit_node (void)
5439 bool use_aeabi_atexit;
5444 if (flag_use_cxa_atexit && !targetm.cxx.use_atexit_for_cxa_atexit ())
5446 /* The declaration for `__cxa_atexit' is:
5448 int __cxa_atexit (void (*)(void *), void *, void *)
5450 We build up the argument types and then then function type
5453 use_aeabi_atexit = targetm.cxx.use_aeabi_atexit ();
5454 /* First, build the pointer-to-function type for the first
5456 arg_types = tree_cons (NULL_TREE, ptr_type_node, void_list_node);
5457 fn_type = build_function_type (void_type_node, arg_types);
5458 fn_ptr_type = build_pointer_type (fn_type);
5459 /* Then, build the rest of the argument types. */
5460 arg_types = tree_cons (NULL_TREE, ptr_type_node, void_list_node);
5461 if (use_aeabi_atexit)
5463 arg_types = tree_cons (NULL_TREE, fn_ptr_type, arg_types);
5464 arg_types = tree_cons (NULL_TREE, ptr_type_node, arg_types);
5468 arg_types = tree_cons (NULL_TREE, ptr_type_node, arg_types);
5469 arg_types = tree_cons (NULL_TREE, fn_ptr_type, arg_types);
5471 /* And the final __cxa_atexit type. */
5472 fn_type = build_function_type (integer_type_node, arg_types);
5473 fn_ptr_type = build_pointer_type (fn_type);
5474 if (use_aeabi_atexit)
5475 name = "__aeabi_atexit";
5477 name = "__cxa_atexit";
5481 /* The declaration for `atexit' is:
5483 int atexit (void (*)());
5485 We build up the argument types and then then function type
5487 fn_type = build_function_type (void_type_node, void_list_node);
5488 fn_ptr_type = build_pointer_type (fn_type);
5489 arg_types = tree_cons (NULL_TREE, fn_ptr_type, void_list_node);
5490 /* Build the final atexit type. */
5491 fn_type = build_function_type (integer_type_node, arg_types);
5495 /* Now, build the function declaration. */
5496 push_lang_context (lang_name_c);
5497 atexit_fndecl = build_library_fn_ptr (name, fn_type);
5498 mark_used (atexit_fndecl);
5499 pop_lang_context ();
5500 atexit_node = decay_conversion (atexit_fndecl);
5505 /* Returns the __dso_handle VAR_DECL. */
5508 get_dso_handle_node (void)
5510 if (dso_handle_node)
5511 return dso_handle_node;
5513 /* Declare the variable. */
5514 dso_handle_node = declare_global_var (get_identifier ("__dso_handle"),
5517 return dso_handle_node;
5520 /* Begin a new function with internal linkage whose job will be simply
5521 to destroy some particular variable. */
5523 static GTY(()) int start_cleanup_cnt;
5526 start_cleanup_fn (void)
5532 bool use_cxa_atexit = flag_use_cxa_atexit
5533 && !targetm.cxx.use_atexit_for_cxa_atexit ();
5535 push_to_top_level ();
5537 /* No need to mangle this. */
5538 push_lang_context (lang_name_c);
5540 /* Build the parameter-types. */
5541 parmtypes = void_list_node;
5542 /* Functions passed to __cxa_atexit take an additional parameter.
5543 We'll just ignore it. After we implement the new calling
5544 convention for destructors, we can eliminate the use of
5545 additional cleanup functions entirely in the -fnew-abi case. */
5547 parmtypes = tree_cons (NULL_TREE, ptr_type_node, parmtypes);
5548 /* Build the function type itself. */
5549 fntype = build_function_type (void_type_node, parmtypes);
5550 /* Build the name of the function. */
5551 sprintf (name, "__tcf_%d", start_cleanup_cnt++);
5552 /* Build the function declaration. */
5553 fndecl = build_lang_decl (FUNCTION_DECL, get_identifier (name), fntype);
5554 /* It's a function with internal linkage, generated by the
5556 TREE_PUBLIC (fndecl) = 0;
5557 DECL_ARTIFICIAL (fndecl) = 1;
5558 /* Make the function `inline' so that it is only emitted if it is
5559 actually needed. It is unlikely that it will be inlined, since
5560 it is only called via a function pointer, but we avoid unnecessary
5561 emissions this way. */
5562 DECL_INLINE (fndecl) = 1;
5563 DECL_DECLARED_INLINE_P (fndecl) = 1;
5564 DECL_INTERFACE_KNOWN (fndecl) = 1;
5565 /* Build the parameter. */
5570 parmdecl = cp_build_parm_decl (NULL_TREE, ptr_type_node);
5571 DECL_CONTEXT (parmdecl) = fndecl;
5572 TREE_USED (parmdecl) = 1;
5573 DECL_ARGUMENTS (fndecl) = parmdecl;
5577 start_preparsed_function (fndecl, NULL_TREE, SF_PRE_PARSED);
5579 pop_lang_context ();
5581 return current_function_decl;
5584 /* Finish the cleanup function begun by start_cleanup_fn. */
5587 end_cleanup_fn (void)
5589 expand_or_defer_fn (finish_function (0));
5591 pop_from_top_level ();
5594 /* Generate code to handle the destruction of DECL, an object with
5595 static storage duration. */
5598 register_dtor_fn (tree decl)
5605 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
5606 return void_zero_node;
5608 /* Call build_cleanup before we enter the anonymous function so that
5609 any access checks will be done relative to the current scope,
5610 rather than the scope of the anonymous function. */
5611 build_cleanup (decl);
5613 /* Now start the function. */
5614 cleanup = start_cleanup_fn ();
5616 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
5617 to the original function, rather than the anonymous one. That
5618 will make the back end think that nested functions are in use,
5619 which causes confusion. */
5621 push_deferring_access_checks (dk_no_check);
5622 fcall = build_cleanup (decl);
5623 pop_deferring_access_checks ();
5625 /* Create the body of the anonymous function. */
5626 compound_stmt = begin_compound_stmt (BCS_FN_BODY);
5627 finish_expr_stmt (fcall);
5628 finish_compound_stmt (compound_stmt);
5631 /* Call atexit with the cleanup function. */
5632 cxx_mark_addressable (cleanup);
5633 mark_used (cleanup);
5634 cleanup = build_unary_op (ADDR_EXPR, cleanup, 0);
5635 if (flag_use_cxa_atexit && !targetm.cxx.use_atexit_for_cxa_atexit ())
5637 args = tree_cons (NULL_TREE,
5638 build_unary_op (ADDR_EXPR, get_dso_handle_node (), 0),
5640 if (targetm.cxx.use_aeabi_atexit ())
5642 args = tree_cons (NULL_TREE, cleanup, args);
5643 args = tree_cons (NULL_TREE, null_pointer_node, args);
5647 args = tree_cons (NULL_TREE, null_pointer_node, args);
5648 args = tree_cons (NULL_TREE, cleanup, args);
5652 args = tree_cons (NULL_TREE, cleanup, NULL_TREE);
5653 return build_function_call (get_atexit_node (), args);
5656 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
5657 is its initializer. Generate code to handle the construction
5658 and destruction of DECL. */
5661 expand_static_init (tree decl, tree init)
5663 gcc_assert (TREE_CODE (decl) == VAR_DECL);
5664 gcc_assert (TREE_STATIC (decl));
5666 /* Some variables require no initialization. */
5668 && !TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl))
5669 && TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
5672 if (DECL_FUNCTION_SCOPE_P (decl))
5674 /* Emit code to perform this initialization but once. */
5675 tree if_stmt = NULL_TREE, inner_if_stmt = NULL_TREE;
5676 tree then_clause = NULL_TREE, inner_then_clause = NULL_TREE;
5677 tree guard, guard_addr;
5678 tree acquire_fn, release_fn, abort_fn;
5681 /* Emit code to perform this initialization but once. This code
5684 static <type> guard;
5685 if (!guard.first_byte) {
5686 if (__cxa_guard_acquire (&guard)) {
5689 // Do initialization.
5690 flag = true; __cxa_guard_release (&guard);
5691 // Register variable for destruction at end of program.
5693 if (!flag) __cxa_guard_abort (&guard);
5697 Note that the `flag' variable is only set to 1 *after* the
5698 initialization is complete. This ensures that an exception,
5699 thrown during the construction, will cause the variable to
5700 reinitialized when we pass through this code again, as per:
5704 If the initialization exits by throwing an exception, the
5705 initialization is not complete, so it will be tried again
5706 the next time control enters the declaration.
5708 This process should be thread-safe, too; multiple threads
5709 should not be able to initialize the variable more than
5712 /* Create the guard variable. */
5713 guard = get_guard (decl);
5715 /* This optimization isn't safe on targets with relaxed memory
5716 consistency. On such targets we force synchronization in
5717 __cxa_guard_acquire. */
5718 if (!targetm.relaxed_ordering || !flag_threadsafe_statics)
5720 /* Begin the conditional initialization. */
5721 if_stmt = begin_if_stmt ();
5722 finish_if_stmt_cond (get_guard_cond (guard), if_stmt);
5723 then_clause = begin_compound_stmt (BCS_NO_SCOPE);
5726 if (flag_threadsafe_statics)
5728 guard_addr = build_address (guard);
5730 acquire_fn = get_identifier ("__cxa_guard_acquire");
5731 release_fn = get_identifier ("__cxa_guard_release");
5732 abort_fn = get_identifier ("__cxa_guard_abort");
5733 if (!get_global_value_if_present (acquire_fn, &acquire_fn))
5735 tree argtypes = tree_cons (NULL_TREE, TREE_TYPE (guard_addr),
5737 tree vfntype = build_function_type (void_type_node, argtypes);
5738 acquire_fn = push_library_fn
5739 (acquire_fn, build_function_type (integer_type_node, argtypes));
5740 release_fn = push_library_fn (release_fn, vfntype);
5741 abort_fn = push_library_fn (abort_fn, vfntype);
5745 release_fn = identifier_global_value (release_fn);
5746 abort_fn = identifier_global_value (abort_fn);
5749 inner_if_stmt = begin_if_stmt ();
5750 finish_if_stmt_cond (build_call_n (acquire_fn, 1, guard_addr),
5753 inner_then_clause = begin_compound_stmt (BCS_NO_SCOPE);
5754 begin = get_target_expr (boolean_false_node);
5755 flag = TARGET_EXPR_SLOT (begin);
5757 TARGET_EXPR_CLEANUP (begin)
5758 = build3 (COND_EXPR, void_type_node, flag,
5760 build_call_n (abort_fn, 1, guard_addr));
5761 CLEANUP_EH_ONLY (begin) = 1;
5763 /* Do the initialization itself. */
5764 init = add_stmt_to_compound (begin, init);
5765 init = add_stmt_to_compound
5766 (init, build2 (MODIFY_EXPR, void_type_node, flag, boolean_true_node));
5767 init = add_stmt_to_compound
5768 (init, build_call_n (release_fn, 1, guard_addr));
5771 init = add_stmt_to_compound (init, set_guard (guard));
5773 /* Use atexit to register a function for destroying this static
5775 init = add_stmt_to_compound (init, register_dtor_fn (decl));
5777 finish_expr_stmt (init);
5779 if (flag_threadsafe_statics)
5781 finish_compound_stmt (inner_then_clause);
5782 finish_then_clause (inner_if_stmt);
5783 finish_if_stmt (inner_if_stmt);
5786 if (!targetm.relaxed_ordering || !flag_threadsafe_statics)
5788 finish_compound_stmt (then_clause);
5789 finish_then_clause (if_stmt);
5790 finish_if_stmt (if_stmt);
5794 static_aggregates = tree_cons (init, decl, static_aggregates);
5798 /* Make TYPE a complete type based on INITIAL_VALUE.
5799 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
5800 2 if there was no information (in which case assume 0 if DO_DEFAULT),
5801 3 if the initializer list is empty (in pedantic mode). */
5804 cp_complete_array_type (tree *ptype, tree initial_value, bool do_default)
5807 tree type, elt_type;
5811 /* An array of character type can be initialized from a
5812 brace-enclosed string constant.
5814 FIXME: this code is duplicated from reshape_init. Probably
5815 we should just call reshape_init here? */
5816 if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (*ptype)))
5817 && TREE_CODE (initial_value) == CONSTRUCTOR
5818 && !VEC_empty (constructor_elt, CONSTRUCTOR_ELTS (initial_value)))
5820 VEC(constructor_elt,gc) *v = CONSTRUCTOR_ELTS (initial_value);
5821 tree value = VEC_index (constructor_elt, v, 0)->value;
5823 if (TREE_CODE (value) == STRING_CST
5824 && VEC_length (constructor_elt, v) == 1)
5825 initial_value = value;
5829 failure = complete_array_type (ptype, initial_value, do_default);
5831 /* We can create the array before the element type is complete, which
5832 means that we didn't have these two bits set in the original type
5833 either. In completing the type, we are expected to propagate these
5834 bits. See also complete_type which does the same thing for arrays
5837 if (TYPE_DOMAIN (type))
5839 elt_type = TREE_TYPE (type);
5840 TYPE_NEEDS_CONSTRUCTING (type) = TYPE_NEEDS_CONSTRUCTING (elt_type);
5841 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type)
5842 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (elt_type);
5848 /* Return zero if something is declared to be a member of type
5849 CTYPE when in the context of CUR_TYPE. STRING is the error
5850 message to print in that case. Otherwise, quietly return 1. */
5853 member_function_or_else (tree ctype, tree cur_type, enum overload_flags flags)
5855 if (ctype && ctype != cur_type)
5857 if (flags == DTOR_FLAG)
5858 error ("destructor for alien class %qT cannot be a member", ctype);
5860 error ("constructor for alien class %qT cannot be a member", ctype);
5866 /* Subroutine of `grokdeclarator'. */
5868 /* Generate errors possibly applicable for a given set of specifiers.
5869 This is for ARM $7.1.2. */
5872 bad_specifiers (tree object,
5881 error ("%qD declared as a %<virtual%> %s", object, type);
5883 error ("%qD declared as an %<inline%> %s", object, type);
5885 error ("%<const%> and %<volatile%> function specifiers on "
5886 "%qD invalid in %s declaration",
5889 error ("%q+D declared as a friend", object);
5891 && (TREE_CODE (object) == TYPE_DECL
5892 || (!TYPE_PTRFN_P (TREE_TYPE (object))
5893 && !TYPE_REFFN_P (TREE_TYPE (object))
5894 && !TYPE_PTRMEMFUNC_P (TREE_TYPE (object)))))
5895 error ("%q+D declared with an exception specification", object);
5898 /* DECL is a member function or static data member and is presently
5899 being defined. Check that the definition is taking place in a
5903 check_class_member_definition_namespace (tree decl)
5905 /* These checks only apply to member functions and static data
5907 gcc_assert (TREE_CODE (decl) == FUNCTION_DECL
5908 || TREE_CODE (decl) == VAR_DECL);
5909 /* We check for problems with specializations in pt.c in
5910 check_specialization_namespace, where we can issue better
5912 if (processing_specialization)
5914 /* There are no restrictions on the placement of
5915 explicit instantiations. */
5916 if (processing_explicit_instantiation)
5920 A member function definition that appears outside of the
5921 class definition shall appear in a namespace scope enclosing
5922 the class definition.
5926 The definition for a static data member shall appear in a
5927 namespace scope enclosing the member's class definition. */
5928 if (!is_ancestor (current_namespace, DECL_CONTEXT (decl)))
5929 pedwarn ("definition of %qD is not in namespace enclosing %qT",
5930 decl, DECL_CONTEXT (decl));
5933 /* Build a PARM_DECL for the "this" parameter. TYPE is the
5934 METHOD_TYPE for a non-static member function; QUALS are the
5935 cv-qualifiers that apply to the function. */
5938 build_this_parm (tree type, cp_cv_quals quals)
5943 cp_cv_quals this_quals;
5945 this_type = TREE_VALUE (TYPE_ARG_TYPES (type));
5946 /* The `this' parameter is implicitly `const'; it cannot be
5948 this_quals = (quals & TYPE_QUAL_RESTRICT) | TYPE_QUAL_CONST;
5949 qual_type = cp_build_qualified_type (this_type, this_quals);
5950 parm = build_artificial_parm (this_identifier, qual_type);
5951 cp_apply_type_quals_to_decl (this_quals, parm);
5955 /* CTYPE is class type, or null if non-class.
5956 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
5958 DECLARATOR is the function's name.
5959 PARMS is a chain of PARM_DECLs for the function.
5960 VIRTUALP is truthvalue of whether the function is virtual or not.
5961 FLAGS are to be passed through to `grokclassfn'.
5962 QUALS are qualifiers indicating whether the function is `const'
5964 RAISES is a list of exceptions that this function can raise.
5965 CHECK is 1 if we must find this method in CTYPE, 0 if we should
5966 not look, and -1 if we should not call `grokclassfn' at all.
5968 SFK is the kind of special function (if any) for the new function.
5970 Returns `NULL_TREE' if something goes wrong, after issuing
5971 applicable error messages. */
5974 grokfndecl (tree ctype,
5978 tree orig_declarator,
5980 enum overload_flags flags,
5987 special_function_kind sfk,
5994 int staticp = ctype && TREE_CODE (type) == FUNCTION_TYPE;
5998 type = build_exception_variant (type, raises);
6000 decl = build_lang_decl (FUNCTION_DECL, declarator, type);
6001 if (TREE_CODE (type) == METHOD_TYPE)
6004 parm = build_this_parm (type, quals);
6005 TREE_CHAIN (parm) = parms;
6008 DECL_ARGUMENTS (decl) = parms;
6009 /* Propagate volatile out from type to decl. */
6010 if (TYPE_VOLATILE (type))
6011 TREE_THIS_VOLATILE (decl) = 1;
6013 /* Setup decl according to sfk. */
6016 case sfk_constructor:
6017 case sfk_copy_constructor:
6018 DECL_CONSTRUCTOR_P (decl) = 1;
6020 case sfk_destructor:
6021 DECL_DESTRUCTOR_P (decl) = 1;
6028 && TREE_CODE (orig_declarator) == TEMPLATE_ID_EXPR)
6032 ("defining explicit specialization %qD in friend declaration",
6036 tree fns = TREE_OPERAND (orig_declarator, 0);
6037 tree args = TREE_OPERAND (orig_declarator, 1);
6039 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
6041 /* Something like `template <class T> friend void f<T>()'. */
6042 error ("invalid use of template-id %qD in declaration "
6043 "of primary template",
6049 /* A friend declaration of the form friend void f<>(). Record
6050 the information in the TEMPLATE_ID_EXPR. */
6051 SET_DECL_IMPLICIT_INSTANTIATION (decl);
6053 if (TREE_CODE (fns) == COMPONENT_REF)
6055 /* Due to bison parser ickiness, we will have already looked
6056 up an operator_name or PFUNCNAME within the current class
6057 (see template_id in parse.y). If the current class contains
6058 such a name, we'll get a COMPONENT_REF here. Undo that. */
6060 gcc_assert (TREE_TYPE (TREE_OPERAND (fns, 0))
6061 == current_class_type);
6062 fns = TREE_OPERAND (fns, 1);
6064 gcc_assert (TREE_CODE (fns) == IDENTIFIER_NODE
6065 || TREE_CODE (fns) == OVERLOAD);
6066 DECL_TEMPLATE_INFO (decl) = tree_cons (fns, args, NULL_TREE);
6068 for (t = TYPE_ARG_TYPES (TREE_TYPE (decl)); t; t = TREE_CHAIN (t))
6069 if (TREE_PURPOSE (t)
6070 && TREE_CODE (TREE_PURPOSE (t)) == DEFAULT_ARG)
6072 error ("default arguments are not allowed in declaration "
6073 "of friend template specialization %qD",
6080 error ("%<inline%> is not allowed in declaration of friend "
6081 "template specialization %qD",
6088 /* If this decl has namespace scope, set that up. */
6090 set_decl_namespace (decl, in_namespace, friendp);
6092 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
6094 /* `main' and builtins have implicit 'C' linkage. */
6095 if ((MAIN_NAME_P (declarator)
6096 || (IDENTIFIER_LENGTH (declarator) > 10
6097 && IDENTIFIER_POINTER (declarator)[0] == '_'
6098 && IDENTIFIER_POINTER (declarator)[1] == '_'
6099 && strncmp (IDENTIFIER_POINTER (declarator)+2, "builtin_", 8) == 0))
6100 && current_lang_name == lang_name_cplusplus
6101 && ctype == NULL_TREE
6102 /* NULL_TREE means global namespace. */
6103 && DECL_CONTEXT (decl) == NULL_TREE)
6104 SET_DECL_LANGUAGE (decl, lang_c);
6106 /* Should probably propagate const out from type to decl I bet (mrs). */
6109 DECL_STATIC_FUNCTION_P (decl) = 1;
6110 DECL_CONTEXT (decl) = ctype;
6115 DECL_CONTEXT (decl) = ctype;
6117 check_class_member_definition_namespace (decl);
6120 if (ctype == NULL_TREE && DECL_MAIN_P (decl))
6122 if (processing_template_decl)
6123 error ("cannot declare %<::main%> to be a template");
6125 error ("cannot declare %<::main%> to be inline");
6127 error ("cannot declare %<::main%> to be static");
6132 /* Members of anonymous types and local classes have no linkage; make
6133 them internal. If a typedef is made later, this will be changed. */
6134 if (ctype && (TYPE_ANONYMOUS_P (ctype)
6135 || decl_function_context (TYPE_MAIN_DECL (ctype))))
6140 /* [basic.link]: A name with no linkage (notably, the name of a class
6141 or enumeration declared in a local scope) shall not be used to
6142 declare an entity with linkage.
6144 Only check this for public decls for now. See core 319, 389. */
6145 t = no_linkage_check (TREE_TYPE (decl),
6146 /*relaxed_p=*/false);
6149 if (TYPE_ANONYMOUS_P (t))
6151 if (DECL_EXTERN_C_P (decl))
6152 /* Allow this; it's pretty common in C. */;
6155 pedwarn ("non-local function %q#D uses anonymous type",
6157 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
6158 pedwarn ("%q+#D does not refer to the unqualified "
6159 "type, so it is not used for linkage",
6164 pedwarn ("non-local function %q#D uses local type %qT", decl, t);
6168 TREE_PUBLIC (decl) = publicp;
6171 DECL_INTERFACE_KNOWN (decl) = 1;
6172 DECL_NOT_REALLY_EXTERN (decl) = 1;
6175 /* If the declaration was declared inline, mark it as such. */
6177 DECL_DECLARED_INLINE_P (decl) = 1;
6178 /* We inline functions that are explicitly declared inline, or, when
6179 the user explicitly asks us to, all functions. */
6180 if (DECL_DECLARED_INLINE_P (decl)
6181 || (flag_inline_trees == 2 && !DECL_INLINE (decl) && funcdef_flag))
6182 DECL_INLINE (decl) = 1;
6184 DECL_EXTERNAL (decl) = 1;
6185 if (quals && TREE_CODE (type) == FUNCTION_TYPE)
6188 ? G_("static member function %qD cannot have cv-qualifier")
6189 : G_("non-member function %qD cannot have cv-qualifier"),
6191 quals = TYPE_UNQUALIFIED;
6194 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl))
6195 && !grok_op_properties (decl, /*complain=*/true))
6198 if (ctype && decl_function_context (decl))
6199 DECL_NO_STATIC_CHAIN (decl) = 1;
6202 /* Make the init_value nonzero so pushdecl knows this is not
6203 tentative. error_mark_node is replaced later with the BLOCK. */
6204 DECL_INITIAL (decl) = error_mark_node;
6206 if (TYPE_NOTHROW_P (type) || nothrow_libfn_p (decl))
6207 TREE_NOTHROW (decl) = 1;
6209 /* Caller will do the rest of this. */
6213 if (ctype != NULL_TREE)
6214 grokclassfn (ctype, decl, flags);
6216 decl = check_explicit_specialization (orig_declarator, decl,
6219 4 * (friendp != 0));
6220 if (decl == error_mark_node)
6225 cplus_decl_attributes (&decl, *attrlist, 0);
6226 *attrlist = NULL_TREE;
6229 /* Check main's type after attributes have been applied. */
6230 if (ctype == NULL_TREE && DECL_MAIN_P (decl))
6232 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl)),
6235 tree oldtypeargs = TYPE_ARG_TYPES (TREE_TYPE (decl));
6237 error ("%<::main%> must return %<int%>");
6238 newtype = build_function_type (integer_type_node, oldtypeargs);
6239 TREE_TYPE (decl) = newtype;
6241 check_main_parameter_types (decl);
6244 if (ctype != NULL_TREE
6245 && (! TYPE_FOR_JAVA (ctype) || check_java_method (decl))
6250 old_decl = check_classfn (ctype, decl,
6251 (processing_template_decl
6252 > template_class_depth (ctype))
6253 ? current_template_parms
6260 if (TREE_CODE (old_decl) == TEMPLATE_DECL)
6261 /* Because grokfndecl is always supposed to return a
6262 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
6263 here. We depend on our callers to figure out that its
6264 really a template that's being returned. */
6265 old_decl = DECL_TEMPLATE_RESULT (old_decl);
6267 if (DECL_STATIC_FUNCTION_P (old_decl)
6268 && TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE)
6269 /* Remove the `this' parm added by grokclassfn.
6270 XXX Isn't this done in start_function, too? */
6271 revert_static_member_fn (decl);
6272 if (DECL_ARTIFICIAL (old_decl))
6273 error ("definition of implicitly-declared %qD", old_decl);
6275 /* Since we've smashed OLD_DECL to its
6276 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
6277 if (TREE_CODE (decl) == TEMPLATE_DECL)
6278 decl = DECL_TEMPLATE_RESULT (decl);
6280 /* Attempt to merge the declarations. This can fail, in
6281 the case of some invalid specialization declarations. */
6282 pushed_scope = push_scope (ctype);
6283 ok = duplicate_decls (decl, old_decl, friendp);
6285 pop_scope (pushed_scope);
6288 error ("no %q#D member function declared in class %qT",
6296 if (DECL_CONSTRUCTOR_P (decl) && !grok_ctor_properties (ctype, decl))
6299 if (ctype == NULL_TREE || check)
6303 DECL_VIRTUAL_P (decl) = 1;
6308 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
6309 the linkage that DECL will receive in the object file. */
6312 set_linkage_for_static_data_member (tree decl)
6314 /* A static data member always has static storage duration and
6315 external linkage. Note that static data members are forbidden in
6316 local classes -- the only situation in which a class has
6317 non-external linkage. */
6318 TREE_PUBLIC (decl) = 1;
6319 TREE_STATIC (decl) = 1;
6320 /* For non-template classes, static data members are always put
6321 out in exactly those files where they are defined, just as
6322 with ordinary namespace-scope variables. */
6323 if (!processing_template_decl)
6324 DECL_INTERFACE_KNOWN (decl) = 1;
6327 /* Create a VAR_DECL named NAME with the indicated TYPE.
6329 If SCOPE is non-NULL, it is the class type or namespace containing
6330 the variable. If SCOPE is NULL, the variable should is created in
6331 the innermost enclosings scope. */
6334 grokvardecl (tree type,
6336 const cp_decl_specifier_seq *declspecs,
6342 tree explicit_scope;
6344 gcc_assert (!name || TREE_CODE (name) == IDENTIFIER_NODE);
6346 /* Compute the scope in which to place the variable, but remember
6347 whether or not that scope was explicitly specified by the user. */
6348 explicit_scope = scope;
6351 /* An explicit "extern" specifier indicates a namespace-scope
6353 if (declspecs->storage_class == sc_extern)
6354 scope = current_namespace;
6355 else if (!at_function_scope_p ())
6356 scope = current_scope ();
6360 && (/* If the variable is a namespace-scope variable declared in a
6361 template, we need DECL_LANG_SPECIFIC. */
6362 (TREE_CODE (scope) == NAMESPACE_DECL && processing_template_decl)
6363 /* Similarly for namespace-scope variables with language linkage
6365 || (TREE_CODE (scope) == NAMESPACE_DECL
6366 && current_lang_name != lang_name_cplusplus)
6367 /* Similarly for static data members. */
6369 decl = build_lang_decl (VAR_DECL, name, type);
6371 decl = build_decl (VAR_DECL, name, type);
6373 if (explicit_scope && TREE_CODE (explicit_scope) == NAMESPACE_DECL)
6374 set_decl_namespace (decl, explicit_scope, 0);
6376 DECL_CONTEXT (decl) = FROB_CONTEXT (scope);
6378 if (declspecs->storage_class == sc_extern)
6380 DECL_THIS_EXTERN (decl) = 1;
6381 DECL_EXTERNAL (decl) = !initialized;
6384 if (DECL_CLASS_SCOPE_P (decl))
6386 set_linkage_for_static_data_member (decl);
6387 /* This function is only called with out-of-class definitions. */
6388 DECL_EXTERNAL (decl) = 0;
6389 check_class_member_definition_namespace (decl);
6391 /* At top level, either `static' or no s.c. makes a definition
6392 (perhaps tentative), and absence of `static' makes it public. */
6393 else if (toplevel_bindings_p ())
6395 TREE_PUBLIC (decl) = (declspecs->storage_class != sc_static
6396 && (DECL_THIS_EXTERN (decl) || ! constp));
6397 TREE_STATIC (decl) = ! DECL_EXTERNAL (decl);
6399 /* Not at top level, only `static' makes a static definition. */
6402 TREE_STATIC (decl) = declspecs->storage_class == sc_static;
6403 TREE_PUBLIC (decl) = DECL_EXTERNAL (decl);
6406 if (declspecs->specs[(int)ds_thread])
6407 DECL_TLS_MODEL (decl) = decl_default_tls_model (decl);
6409 if (TREE_PUBLIC (decl))
6411 /* [basic.link]: A name with no linkage (notably, the name of a class
6412 or enumeration declared in a local scope) shall not be used to
6413 declare an entity with linkage.
6415 Only check this for public decls for now. */
6416 tree t = no_linkage_check (TREE_TYPE (decl), /*relaxed_p=*/false);
6419 if (TYPE_ANONYMOUS_P (t))
6421 if (DECL_EXTERN_C_P (decl))
6422 /* Allow this; it's pretty common in C. */
6426 /* DRs 132, 319 and 389 seem to indicate types with
6427 no linkage can only be used to declare extern "C"
6428 entities. Since it's not always an error in the
6429 ISO C++ 90 Standard, we only issue a warning. */
6430 warning (0, "non-local variable %q#D uses anonymous type",
6432 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
6433 warning (0, "%q+#D does not refer to the unqualified "
6434 "type, so it is not used for linkage",
6439 warning (0, "non-local variable %q#D uses local type %qT", decl, t);
6443 DECL_INTERFACE_KNOWN (decl) = 1;
6448 /* Create and return a canonical pointer to member function type, for
6449 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
6452 build_ptrmemfunc_type (tree type)
6456 tree unqualified_variant = NULL_TREE;
6458 if (type == error_mark_node)
6461 /* If a canonical type already exists for this type, use it. We use
6462 this method instead of type_hash_canon, because it only does a
6463 simple equality check on the list of field members. */
6465 if ((t = TYPE_GET_PTRMEMFUNC_TYPE (type)))
6468 /* Make sure that we always have the unqualified pointer-to-member
6470 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
6472 = build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type));
6474 t = make_aggr_type (RECORD_TYPE);
6475 xref_basetypes (t, NULL_TREE);
6477 /* Let the front end know this is a pointer to member function... */
6478 TYPE_PTRMEMFUNC_FLAG (t) = 1;
6479 /* ... and not really an aggregate. */
6480 SET_IS_AGGR_TYPE (t, 0);
6482 field = build_decl (FIELD_DECL, pfn_identifier, type);
6485 field = build_decl (FIELD_DECL, delta_identifier, delta_type_node);
6486 TREE_CHAIN (field) = fields;
6489 finish_builtin_struct (t, "__ptrmemfunc_type", fields, ptr_type_node);
6491 /* Zap out the name so that the back end will give us the debugging
6492 information for this anonymous RECORD_TYPE. */
6493 TYPE_NAME (t) = NULL_TREE;
6495 /* If this is not the unqualified form of this pointer-to-member
6496 type, set the TYPE_MAIN_VARIANT for this type to be the
6497 unqualified type. Since they are actually RECORD_TYPEs that are
6498 not variants of each other, we must do this manually. */
6499 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
6501 t = build_qualified_type (t, cp_type_quals (type));
6502 TYPE_MAIN_VARIANT (t) = unqualified_variant;
6503 TYPE_NEXT_VARIANT (t) = TYPE_NEXT_VARIANT (unqualified_variant);
6504 TYPE_NEXT_VARIANT (unqualified_variant) = t;
6507 /* Cache this pointer-to-member type so that we can find it again
6509 TYPE_SET_PTRMEMFUNC_TYPE (type, t);
6511 if (TYPE_STRUCTURAL_EQUALITY_P (type))
6512 SET_TYPE_STRUCTURAL_EQUALITY (t);
6513 else if (TYPE_CANONICAL (type) != type)
6514 TYPE_CANONICAL (t) = build_ptrmemfunc_type (TYPE_CANONICAL (type));
6519 /* Create and return a pointer to data member type. */
6522 build_ptrmem_type (tree class_type, tree member_type)
6524 if (TREE_CODE (member_type) == METHOD_TYPE)
6528 arg_types = TYPE_ARG_TYPES (member_type);
6529 class_type = (cp_build_qualified_type
6531 cp_type_quals (TREE_TYPE (TREE_VALUE (arg_types)))));
6533 = build_method_type_directly (class_type,
6534 TREE_TYPE (member_type),
6535 TREE_CHAIN (arg_types));
6536 return build_ptrmemfunc_type (build_pointer_type (member_type));
6540 gcc_assert (TREE_CODE (member_type) != FUNCTION_TYPE);
6541 return build_offset_type (class_type, member_type);
6545 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
6546 Check to see that the definition is valid. Issue appropriate error
6547 messages. Return 1 if the definition is particularly bad, or 0
6551 check_static_variable_definition (tree decl, tree type)
6553 /* Motion 10 at San Diego: If a static const integral data member is
6554 initialized with an integral constant expression, the initializer
6555 may appear either in the declaration (within the class), or in
6556 the definition, but not both. If it appears in the class, the
6557 member is a member constant. The file-scope definition is always
6559 if (!ARITHMETIC_TYPE_P (type) && TREE_CODE (type) != ENUMERAL_TYPE)
6561 error ("invalid in-class initialization of static data member "
6562 "of non-integral type %qT",
6564 /* If we just return the declaration, crashes will sometimes
6565 occur. We therefore return void_type_node, as if this were a
6566 friend declaration, to cause callers to completely ignore
6567 this declaration. */
6570 else if (!CP_TYPE_CONST_P (type))
6571 error ("ISO C++ forbids in-class initialization of non-const "
6572 "static member %qD",
6574 else if (pedantic && !INTEGRAL_TYPE_P (type))
6575 pedwarn ("ISO C++ forbids initialization of member constant "
6576 "%qD of non-integral type %qT", decl, type);
6581 /* Given the SIZE (i.e., number of elements) in an array, compute an
6582 appropriate index type for the array. If non-NULL, NAME is the
6583 name of the thing being declared. */
6586 compute_array_index_type (tree name, tree size)
6590 tree abi_1_itype = NULL_TREE;
6592 if (error_operand_p (size))
6593 return error_mark_node;
6595 type = TREE_TYPE (size);
6596 /* The array bound must be an integer type. */
6597 if (!dependent_type_p (type) && !INTEGRAL_TYPE_P (type))
6600 error ("size of array %qD has non-integral type %qT", name, type);
6602 error ("size of array has non-integral type %qT", type);
6603 size = integer_one_node;
6604 type = TREE_TYPE (size);
6607 if (value_dependent_expression_p (size))
6609 /* We cannot do any checking for a value-dependent SIZE. Just
6610 build the index type and mark that it requires structural
6612 itype = build_index_type (build_min (MINUS_EXPR, sizetype,
6613 size, integer_one_node));
6614 SET_TYPE_STRUCTURAL_EQUALITY (itype);
6618 if (!abi_version_at_least (2) && processing_template_decl)
6619 /* For abi-1, we handled all instances in templates the same way,
6620 even when they were non-dependent. This effects the manglings
6621 produced. So, we do the normal checking for non-dependent
6622 sizes, but at the end we'll return the same type that abi-1
6623 would have, but with TYPE_CANONICAL set to the "right"
6624 value that the current ABI would provide. */
6625 abi_1_itype = build_index_type (build_min (MINUS_EXPR, sizetype,
6626 size, integer_one_node));
6628 /* The size might be the result of a cast. */
6629 STRIP_TYPE_NOPS (size);
6631 /* It might be a const variable or enumeration constant. */
6632 size = integral_constant_value (size);
6634 /* Normally, the array-bound will be a constant. */
6635 if (TREE_CODE (size) == INTEGER_CST)
6637 /* Check to see if the array bound overflowed. Make that an
6638 error, no matter how generous we're being. */
6639 int old_flag_pedantic_errors = flag_pedantic_errors;
6640 int old_pedantic = pedantic;
6641 pedantic = flag_pedantic_errors = 1;
6642 constant_expression_warning (size);
6643 pedantic = old_pedantic;
6644 flag_pedantic_errors = old_flag_pedantic_errors;
6646 /* An array must have a positive number of elements. */
6647 if (INT_CST_LT (size, integer_zero_node))
6650 error ("size of array %qD is negative", name);
6652 error ("size of array is negative");
6653 size = integer_one_node;
6655 /* As an extension we allow zero-sized arrays. We always allow
6656 them in system headers because glibc uses them. */
6657 else if (integer_zerop (size) && pedantic && !in_system_header)
6660 pedwarn ("ISO C++ forbids zero-size array %qD", name);
6662 pedwarn ("ISO C++ forbids zero-size array");
6665 else if (TREE_CONSTANT (size))
6667 /* `(int) &fn' is not a valid array bound. */
6669 error ("size of array %qD is not an integral constant-expression",
6672 error ("size of array is not an integral constant-expression");
6673 size = integer_one_node;
6675 else if (pedantic && warn_vla != 0)
6678 pedwarn ("ISO C++ forbids variable length array %qD", name);
6680 pedwarn ("ISO C++ forbids variable length array");
6682 else if (warn_vla > 0)
6686 "variable length array %qD is used", name);
6689 "variable length array is used");
6692 if (processing_template_decl && !TREE_CONSTANT (size))
6693 /* A variable sized array. */
6694 itype = build_min (MINUS_EXPR, sizetype, size, integer_one_node);
6697 HOST_WIDE_INT saved_processing_template_decl;
6699 /* Compute the index of the largest element in the array. It is
6700 one less than the number of elements in the array. We save
6701 and restore PROCESSING_TEMPLATE_DECL so that computations in
6702 cp_build_binary_op will be appropriately folded. */
6703 saved_processing_template_decl = processing_template_decl;
6704 processing_template_decl = 0;
6705 itype = cp_build_binary_op (MINUS_EXPR,
6706 cp_convert (ssizetype, size),
6707 cp_convert (ssizetype, integer_one_node));
6708 itype = fold (itype);
6709 processing_template_decl = saved_processing_template_decl;
6711 if (!TREE_CONSTANT (itype))
6712 /* A variable sized array. */
6713 itype = variable_size (itype);
6714 /* Make sure that there was no overflow when creating to a signed
6715 index type. (For example, on a 32-bit machine, an array with
6716 size 2^32 - 1 is too big.) */
6717 else if (TREE_CODE (itype) == INTEGER_CST
6718 && TREE_OVERFLOW (itype))
6720 error ("overflow in array dimension");
6721 TREE_OVERFLOW (itype) = 0;
6725 /* Create and return the appropriate index type. */
6728 tree t = build_index_type (itype);
6729 TYPE_CANONICAL (abi_1_itype) = TYPE_CANONICAL (t);
6733 return build_index_type (itype);
6736 /* Returns the scope (if any) in which the entity declared by
6737 DECLARATOR will be located. If the entity was declared with an
6738 unqualified name, NULL_TREE is returned. */
6741 get_scope_of_declarator (const cp_declarator *declarator)
6743 while (declarator && declarator->kind != cdk_id)
6744 declarator = declarator->declarator;
6746 /* If the declarator-id is a SCOPE_REF, the scope in which the
6747 declaration occurs is the first operand. */
6749 && declarator->u.id.qualifying_scope)
6750 return declarator->u.id.qualifying_scope;
6752 /* Otherwise, the declarator is not a qualified name; the entity will
6753 be declared in the current scope. */
6757 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
6758 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
6762 create_array_type_for_decl (tree name, tree type, tree size)
6764 tree itype = NULL_TREE;
6765 const char* error_msg;
6767 /* If things have already gone awry, bail now. */
6768 if (type == error_mark_node || size == error_mark_node)
6769 return error_mark_node;
6771 /* Assume that everything will go OK. */
6774 /* There are some types which cannot be array elements. */
6775 switch (TREE_CODE (type))
6778 error_msg = "array of void";
6782 error_msg = "array of functions";
6785 case REFERENCE_TYPE:
6786 error_msg = "array of references";
6790 error_msg = "array of function members";
6797 /* If something went wrong, issue an error-message and return. */
6801 error ("declaration of %qD as %s", name, error_msg);
6803 error ("creating %s", error_msg);
6805 return error_mark_node;
6810 The constant expressions that specify the bounds of the arrays
6811 can be omitted only for the first member of the sequence. */
6812 if (TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type))
6815 error ("declaration of %qD as multidimensional array must "
6816 "have bounds for all dimensions except the first",
6819 error ("multidimensional array must have bounds for all "
6820 "dimensions except the first");
6822 return error_mark_node;
6825 /* Figure out the index type for the array. */
6827 itype = compute_array_index_type (name, size);
6830 T is called the array element type; this type shall not be [...] an
6831 abstract class type. */
6832 abstract_virtuals_error (name, type);
6834 return build_cplus_array_type (type, itype);
6837 /* Check that it's OK to declare a function with the indicated TYPE.
6838 SFK indicates the kind of special function (if any) that this
6839 function is. OPTYPE is the type given in a conversion operator
6840 declaration, or the class type for a constructor/destructor.
6841 Returns the actual return type of the function; that
6842 may be different than TYPE if an error occurs, or for certain
6843 special functions. */
6846 check_special_function_return_type (special_function_kind sfk,
6852 case sfk_constructor:
6854 error ("return type specification for constructor invalid");
6856 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
6857 type = build_pointer_type (optype);
6859 type = void_type_node;
6862 case sfk_destructor:
6864 error ("return type specification for destructor invalid");
6865 /* We can't use the proper return type here because we run into
6866 problems with ambiguous bases and covariant returns.
6867 Java classes are left unchanged because (void *) isn't a valid
6868 Java type, and we don't want to change the Java ABI. */
6869 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
6870 type = build_pointer_type (void_type_node);
6872 type = void_type_node;
6875 case sfk_conversion:
6876 if (type && !same_type_p (type, optype))
6877 error ("operator %qT declared to return %qT", optype, type);
6879 pedwarn ("return type specified for %<operator %T%>", optype);
6890 /* A variable or data member (whose unqualified name is IDENTIFIER)
6891 has been declared with the indicated TYPE. If the TYPE is not
6892 acceptable, issue an error message and return a type to use for
6893 error-recovery purposes. */
6896 check_var_type (tree identifier, tree type)
6898 if (VOID_TYPE_P (type))
6901 error ("unnamed variable or field declared void");
6902 else if (TREE_CODE (identifier) == IDENTIFIER_NODE)
6904 gcc_assert (!IDENTIFIER_OPNAME_P (identifier));
6905 error ("variable or field %qE declared void", identifier);
6908 error ("variable or field declared void");
6909 type = error_mark_node;
6915 /* Given declspecs and a declarator (abstract or otherwise), determine
6916 the name and type of the object declared and construct a DECL node
6919 DECLSPECS points to the representation of declaration-specifier
6920 sequence that precedes declarator.
6922 DECL_CONTEXT says which syntactic context this declaration is in:
6923 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
6924 FUNCDEF for a function definition. Like NORMAL but a few different
6925 error messages in each case. Return value may be zero meaning
6926 this definition is too screwy to try to parse.
6927 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
6928 handle member functions (which have FIELD context).
6929 Return value may be zero meaning this definition is too screwy to
6931 PARM for a parameter declaration (either within a function prototype
6932 or before a function body). Make a PARM_DECL, or return void_type_node.
6933 CATCHPARM for a parameter declaration before a catch clause.
6934 TYPENAME if for a typename (in a cast or sizeof).
6935 Don't make a DECL node; just return the ..._TYPE node.
6936 FIELD for a struct or union field; make a FIELD_DECL.
6937 BITFIELD for a field with specified width.
6938 INITIALIZED is 1 if the decl has an initializer.
6940 ATTRLIST is a pointer to the list of attributes, which may be NULL
6941 if there are none; *ATTRLIST may be modified if attributes from inside
6942 the declarator should be applied to the declaration.
6944 When this function is called, scoping variables (such as
6945 CURRENT_CLASS_TYPE) should reflect the scope in which the
6946 declaration occurs, not the scope in which the new declaration will
6947 be placed. For example, on:
6951 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
6954 Returns a DECL (if a declarator is present), a TYPE (if there is no
6955 declarator, in cases like "struct S;"), or the ERROR_MARK_NODE if an
6959 grokdeclarator (const cp_declarator *declarator,
6960 const cp_decl_specifier_seq *declspecs,
6961 enum decl_context decl_context,
6965 tree type = NULL_TREE;
6967 int virtualp, explicitp, friendp, inlinep, staticp;
6968 int explicit_int = 0;
6969 int explicit_char = 0;
6970 int defaulted_int = 0;
6971 tree dependent_name = NULL_TREE;
6973 tree typedef_decl = NULL_TREE;
6974 const char *name = NULL;
6975 tree typedef_type = NULL_TREE;
6976 /* True if this declarator is a function definition. */
6977 bool funcdef_flag = false;
6978 cp_declarator_kind innermost_code = cdk_error;
6981 /* See the code below that used this. */
6982 tree decl_attr = NULL_TREE;
6985 /* Keep track of what sort of function is being processed
6986 so that we can warn about default return values, or explicit
6987 return values which do not match prescribed defaults. */
6988 special_function_kind sfk = sfk_none;
6990 tree dname = NULL_TREE;
6991 tree ctor_return_type = NULL_TREE;
6992 enum overload_flags flags = NO_SPECIAL;
6993 /* cv-qualifiers that apply to the declarator, for a declaration of
6994 a member function. */
6995 cp_cv_quals memfn_quals = TYPE_UNQUALIFIED;
6996 /* cv-qualifiers that apply to the type specified by the DECLSPECS. */
6998 tree raises = NULL_TREE;
6999 int template_count = 0;
7000 tree returned_attrs = NULL_TREE;
7001 tree parms = NULL_TREE;
7002 const cp_declarator *id_declarator;
7003 /* The unqualified name of the declarator; either an
7004 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
7005 tree unqualified_id;
7006 /* The class type, if any, in which this entity is located,
7007 or NULL_TREE if none. Note that this value may be different from
7008 the current class type; for example if an attempt is made to declare
7009 "A::f" inside "B", this value will be "A". */
7010 tree ctype = current_class_type;
7011 /* The NAMESPACE_DECL for the namespace in which this entity is
7012 located. If an unqualified name is used to declare the entity,
7013 this value will be NULL_TREE, even if the entity is located at
7015 tree in_namespace = NULL_TREE;
7016 cp_storage_class storage_class;
7017 bool unsigned_p, signed_p, short_p, long_p, thread_p;
7018 bool type_was_error_mark_node = false;
7019 bool parameter_pack_p = declarator? declarator->parameter_pack_p : false;
7020 bool set_no_warning = false;
7022 signed_p = declspecs->specs[(int)ds_signed];
7023 unsigned_p = declspecs->specs[(int)ds_unsigned];
7024 short_p = declspecs->specs[(int)ds_short];
7025 long_p = declspecs->specs[(int)ds_long];
7026 longlong = declspecs->specs[(int)ds_long] >= 2;
7027 thread_p = declspecs->specs[(int)ds_thread];
7029 if (decl_context == FUNCDEF)
7030 funcdef_flag = true, decl_context = NORMAL;
7031 else if (decl_context == MEMFUNCDEF)
7032 funcdef_flag = true, decl_context = FIELD;
7033 else if (decl_context == BITFIELD)
7034 bitfield = 1, decl_context = FIELD;
7036 /* Look inside a declarator for the name being declared
7037 and get it as a string, for an error message. */
7038 for (id_declarator = declarator;
7040 id_declarator = id_declarator->declarator)
7042 if (id_declarator->kind != cdk_id)
7043 innermost_code = id_declarator->kind;
7045 switch (id_declarator->kind)
7048 if (id_declarator->declarator
7049 && id_declarator->declarator->kind == cdk_id)
7051 sfk = id_declarator->declarator->u.id.sfk;
7052 if (sfk == sfk_destructor)
7059 tree qualifying_scope = id_declarator->u.id.qualifying_scope;
7060 tree decl = id_declarator->u.id.unqualified_name;
7063 if (qualifying_scope)
7065 if (at_function_scope_p ())
7069 A declarator-id shall not be qualified except
7072 None of the cases are permitted in block
7074 if (qualifying_scope == global_namespace)
7075 error ("invalid use of qualified-name %<::%D%>",
7077 else if (TYPE_P (qualifying_scope))
7078 error ("invalid use of qualified-name %<%T::%D%>",
7079 qualifying_scope, decl);
7081 error ("invalid use of qualified-name %<%D::%D%>",
7082 qualifying_scope, decl);
7083 return error_mark_node;
7085 else if (TYPE_P (qualifying_scope))
7087 ctype = qualifying_scope;
7088 if (innermost_code != cdk_function
7089 && current_class_type
7090 && !UNIQUELY_DERIVED_FROM_P (ctype,
7091 current_class_type))
7093 error ("type %qT is not derived from type %qT",
7094 ctype, current_class_type);
7095 return error_mark_node;
7098 else if (TREE_CODE (qualifying_scope) == NAMESPACE_DECL)
7099 in_namespace = qualifying_scope;
7101 switch (TREE_CODE (decl))
7107 if (innermost_code != cdk_function)
7109 error ("declaration of %qD as non-function", decl);
7110 return error_mark_node;
7112 else if (!qualifying_scope
7113 && !(current_class_type && at_class_scope_p ()))
7115 error ("declaration of %qD as non-member", decl);
7116 return error_mark_node;
7119 type = TREE_OPERAND (decl, 0);
7120 name = IDENTIFIER_POINTER (constructor_name (type));
7125 case TEMPLATE_ID_EXPR:
7127 tree fns = TREE_OPERAND (decl, 0);
7130 if (TREE_CODE (dname) != IDENTIFIER_NODE)
7132 gcc_assert (is_overloaded_fn (dname));
7133 dname = DECL_NAME (get_first_fn (dname));
7138 case IDENTIFIER_NODE:
7139 if (TREE_CODE (decl) == IDENTIFIER_NODE)
7142 if (C_IS_RESERVED_WORD (dname))
7144 error ("declarator-id missing; using reserved word %qD",
7146 name = IDENTIFIER_POINTER (dname);
7148 else if (!IDENTIFIER_TYPENAME_P (dname))
7149 name = IDENTIFIER_POINTER (dname);
7152 gcc_assert (flags == NO_SPECIAL);
7153 flags = TYPENAME_FLAG;
7154 ctor_return_type = TREE_TYPE (dname);
7155 sfk = sfk_conversion;
7156 if (is_typename_at_global_scope (dname))
7157 name = IDENTIFIER_POINTER (dname);
7159 name = "<invalid operator>";
7175 return error_mark_node;
7181 if (id_declarator->kind == cdk_id)
7187 The declarator in a function-definition shall have the form
7188 D1 ( parameter-declaration-clause) ... */
7189 if (funcdef_flag && innermost_code != cdk_function)
7191 error ("function definition does not declare parameters");
7192 return error_mark_node;
7195 if (((dname && IDENTIFIER_OPNAME_P (dname)) || flags == TYPENAME_FLAG)
7196 && innermost_code != cdk_function
7197 && ! (ctype && !declspecs->any_specifiers_p))
7199 error ("declaration of %qD as non-function", dname);
7200 return error_mark_node;
7203 /* Anything declared one level down from the top level
7204 must be one of the parameters of a function
7205 (because the body is at least two levels down). */
7207 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
7208 by not allowing C++ class definitions to specify their parameters
7209 with xdecls (must be spec.d in the parmlist).
7211 Since we now wait to push a class scope until we are sure that
7212 we are in a legitimate method context, we must set oldcname
7213 explicitly (since current_class_name is not yet alive).
7215 We also want to avoid calling this a PARM if it is in a namespace. */
7217 if (decl_context == NORMAL && !toplevel_bindings_p ())
7219 struct cp_binding_level *b = current_binding_level;
7220 current_binding_level = b->level_chain;
7221 if (current_binding_level != 0 && toplevel_bindings_p ())
7222 decl_context = PARM;
7223 current_binding_level = b;
7227 name = decl_context == PARM ? "parameter" : "type name";
7229 /* If there were multiple types specified in the decl-specifier-seq,
7230 issue an error message. */
7231 if (declspecs->multiple_types_p)
7233 error ("two or more data types in declaration of %qs", name);
7234 return error_mark_node;
7237 /* Extract the basic type from the decl-specifier-seq. */
7238 type = declspecs->type;
7239 if (type == error_mark_node)
7242 type_was_error_mark_node = true;
7244 /* If the entire declaration is itself tagged as deprecated then
7245 suppress reports of deprecated items. */
7246 if (type && TREE_DEPRECATED (type)
7247 && deprecated_state != DEPRECATED_SUPPRESS)
7248 warn_deprecated_use (type);
7249 if (type && TREE_CODE (type) == TYPE_DECL)
7251 typedef_decl = type;
7252 type = TREE_TYPE (typedef_decl);
7254 /* No type at all: default to `int', and set DEFAULTED_INT
7255 because it was not a user-defined typedef. */
7256 if (type == NULL_TREE && (signed_p || unsigned_p || long_p || short_p))
7258 /* These imply 'int'. */
7259 type = integer_type_node;
7263 explicit_int = declspecs->explicit_int_p;
7264 explicit_char = declspecs->explicit_char_p;
7267 /* See the code below that used this. */
7269 decl_attr = DECL_ATTRIBUTES (typedef_decl);
7271 typedef_type = type;
7274 if (sfk != sfk_conversion)
7275 ctor_return_type = ctype;
7277 if (sfk != sfk_none)
7278 type = check_special_function_return_type (sfk, type,
7280 else if (type == NULL_TREE)
7286 /* We handle `main' specially here, because 'main () { }' is so
7287 common. With no options, it is allowed. With -Wreturn-type,
7288 it is a warning. It is only an error with -pedantic-errors. */
7289 is_main = (funcdef_flag
7290 && dname && MAIN_NAME_P (dname)
7291 && ctype == NULL_TREE
7292 && in_namespace == NULL_TREE
7293 && current_namespace == global_namespace);
7295 if (type_was_error_mark_node)
7296 /* We've already issued an error, don't complain more. */;
7297 else if (in_system_header || flag_ms_extensions)
7298 /* Allow it, sigh. */;
7299 else if (pedantic || ! is_main)
7300 pedwarn ("ISO C++ forbids declaration of %qs with no type", name);
7302 warning (OPT_Wreturn_type,
7303 "ISO C++ forbids declaration of %qs with no type", name);
7305 type = integer_type_node;
7310 /* Now process the modifiers that were specified
7311 and check for invalid combinations. */
7313 /* Long double is a special combination. */
7314 if (long_p && !longlong && TYPE_MAIN_VARIANT (type) == double_type_node)
7317 type = build_qualified_type (long_double_type_node,
7318 cp_type_quals (type));
7321 /* Check all other uses of type modifiers. */
7323 if (unsigned_p || signed_p || long_p || short_p)
7327 if ((signed_p || unsigned_p) && TREE_CODE (type) != INTEGER_TYPE)
7328 error ("%<signed%> or %<unsigned%> invalid for %qs", name);
7329 else if (signed_p && unsigned_p)
7330 error ("%<signed%> and %<unsigned%> specified together for %qs", name);
7331 else if (longlong && TREE_CODE (type) != INTEGER_TYPE)
7332 error ("%<long long%> invalid for %qs", name);
7333 else if (long_p && TREE_CODE (type) == REAL_TYPE)
7334 error ("%<long%> invalid for %qs", name);
7335 else if (short_p && TREE_CODE (type) == REAL_TYPE)
7336 error ("%<short%> invalid for %qs", name);
7337 else if ((long_p || short_p) && TREE_CODE (type) != INTEGER_TYPE)
7338 error ("%<long%> or %<short%> invalid for %qs", name);
7339 else if ((long_p || short_p) && explicit_char)
7340 error ("%<long%> or %<short%> specified with char for %qs", name);
7341 else if (long_p && short_p)
7342 error ("%<long%> and %<short%> specified together for %qs", name);
7346 if (!explicit_int && !defaulted_int && !explicit_char && pedantic)
7348 pedwarn ("long, short, signed or unsigned used invalidly for %qs",
7350 if (flag_pedantic_errors)
7355 /* Discard the type modifiers if they are invalid. */
7366 /* Decide whether an integer type is signed or not.
7367 Optionally treat bitfields as signed by default. */
7371 It is implementation-defined whether a plain (neither
7372 explicitly signed or unsigned) char, short, int, or long
7373 bit-field is signed or unsigned.
7375 Naturally, we extend this to long long as well. Note that
7376 this does not include wchar_t. */
7377 || (bitfield && !flag_signed_bitfields
7379 /* A typedef for plain `int' without `signed' can be
7380 controlled just like plain `int', but a typedef for
7381 `signed int' cannot be so controlled. */
7383 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl))
7384 && TREE_CODE (type) == INTEGER_TYPE
7385 && !same_type_p (TYPE_MAIN_VARIANT (type), wchar_type_node)))
7388 type = long_long_unsigned_type_node;
7390 type = long_unsigned_type_node;
7392 type = short_unsigned_type_node;
7393 else if (type == char_type_node)
7394 type = unsigned_char_type_node;
7395 else if (typedef_decl)
7396 type = unsigned_type_for (type);
7398 type = unsigned_type_node;
7400 else if (signed_p && type == char_type_node)
7401 type = signed_char_type_node;
7403 type = long_long_integer_type_node;
7405 type = long_integer_type_node;
7407 type = short_integer_type_node;
7409 if (declspecs->specs[(int)ds_complex])
7411 if (TREE_CODE (type) != INTEGER_TYPE && TREE_CODE (type) != REAL_TYPE)
7412 error ("complex invalid for %qs", name);
7413 /* If we just have "complex", it is equivalent to
7414 "complex double", but if any modifiers at all are specified it is
7415 the complex form of TYPE. E.g, "complex short" is
7416 "complex short int". */
7418 else if (defaulted_int && ! longlong
7419 && ! (long_p || short_p || signed_p || unsigned_p))
7420 type = complex_double_type_node;
7421 else if (type == integer_type_node)
7422 type = complex_integer_type_node;
7423 else if (type == float_type_node)
7424 type = complex_float_type_node;
7425 else if (type == double_type_node)
7426 type = complex_double_type_node;
7427 else if (type == long_double_type_node)
7428 type = complex_long_double_type_node;
7430 type = build_complex_type (type);
7433 type_quals = TYPE_UNQUALIFIED;
7434 if (declspecs->specs[(int)ds_const])
7435 type_quals |= TYPE_QUAL_CONST;
7436 if (declspecs->specs[(int)ds_volatile])
7437 type_quals |= TYPE_QUAL_VOLATILE;
7438 if (declspecs->specs[(int)ds_restrict])
7439 type_quals |= TYPE_QUAL_RESTRICT;
7440 if (sfk == sfk_conversion && type_quals != TYPE_UNQUALIFIED)
7441 error ("qualifiers are not allowed on declaration of %<operator %T%>",
7444 if (TREE_CODE (type) == FUNCTION_TYPE
7445 && type_quals != TYPE_UNQUALIFIED)
7447 /* This was an error in C++98 (cv-qualifiers cannot be added to
7448 a function type), but DR 295 makes the code well-formed by
7449 dropping the extra qualifiers. */
7452 tree bad_type = build_qualified_type (type, type_quals);
7453 pedwarn ("ignoring %qV qualifiers added to function type %qT",
7456 type_quals = TYPE_UNQUALIFIED;
7458 type_quals |= cp_type_quals (type);
7459 type = cp_build_qualified_type_real
7460 (type, type_quals, ((typedef_decl && !DECL_ARTIFICIAL (typedef_decl)
7461 ? tf_ignore_bad_quals : 0) | tf_warning_or_error));
7462 /* We might have ignored or rejected some of the qualifiers. */
7463 type_quals = cp_type_quals (type);
7466 inlinep = !! declspecs->specs[(int)ds_inline];
7467 virtualp = !! declspecs->specs[(int)ds_virtual];
7468 explicitp = !! declspecs->specs[(int)ds_explicit];
7470 storage_class = declspecs->storage_class;
7471 if (storage_class == sc_static)
7472 staticp = 1 + (decl_context == FIELD);
7474 if (virtualp && staticp == 2)
7476 error ("member %qD cannot be declared both virtual and static", dname);
7477 storage_class = sc_none;
7480 friendp = !! declspecs->specs[(int)ds_friend];
7482 if (dependent_name && !friendp)
7484 error ("%<%T::%D%> is not a valid declarator", ctype, dependent_name);
7485 return error_mark_node;
7488 /* Issue errors about use of storage classes for parameters. */
7489 if (decl_context == PARM)
7491 if (declspecs->specs[(int)ds_typedef])
7493 error ("typedef declaration invalid in parameter declaration");
7494 return error_mark_node;
7496 else if (storage_class == sc_static
7497 || storage_class == sc_extern
7499 error ("storage class specifiers invalid in parameter declarations");
7502 /* Give error if `virtual' is used outside of class declaration. */
7504 && (current_class_name == NULL_TREE || decl_context != FIELD))
7506 error ("virtual outside class declaration");
7510 /* Static anonymous unions are dealt with here. */
7511 if (staticp && decl_context == TYPENAME
7513 && ANON_AGGR_TYPE_P (declspecs->type))
7514 decl_context = FIELD;
7516 /* Warn about storage classes that are invalid for certain
7517 kinds of declarations (parameters, typenames, etc.). */
7520 && storage_class != sc_extern
7521 && storage_class != sc_static)
7522 || declspecs->specs[(int)ds_typedef]))
7524 error ("multiple storage classes in declaration of %qs", name);
7527 if (declspecs->conflicting_specifiers_p)
7529 error ("conflicting specifiers in declaration of %qs", name);
7530 storage_class = sc_none;
7532 else if (decl_context != NORMAL
7533 && ((storage_class != sc_none
7534 && storage_class != sc_mutable)
7537 if ((decl_context == PARM || decl_context == CATCHPARM)
7538 && (storage_class == sc_register
7539 || storage_class == sc_auto))
7541 else if (declspecs->specs[(int)ds_typedef])
7543 else if (decl_context == FIELD
7544 /* C++ allows static class elements. */
7545 && storage_class == sc_static)
7546 /* C++ also allows inlines and signed and unsigned elements,
7547 but in those cases we don't come in here. */
7551 if (decl_context == FIELD)
7552 error ("storage class specified for %qs", name);
7555 if (decl_context == PARM || decl_context == CATCHPARM)
7556 error ("storage class specified for parameter %qs", name);
7558 error ("storage class specified for typename");
7560 if (storage_class == sc_register
7561 || storage_class == sc_auto
7562 || storage_class == sc_extern
7564 storage_class = sc_none;
7567 else if (storage_class == sc_extern && initialized
7570 if (toplevel_bindings_p ())
7572 /* It's common practice (and completely valid) to have a const
7573 be initialized and declared extern. */
7574 if (!(type_quals & TYPE_QUAL_CONST))
7575 warning (0, "%qs initialized and declared %<extern%>", name);
7578 error ("%qs has both %<extern%> and initializer", name);
7580 else if (storage_class == sc_extern && funcdef_flag
7581 && ! toplevel_bindings_p ())
7582 error ("nested function %qs declared %<extern%>", name);
7583 else if (toplevel_bindings_p ())
7585 if (storage_class == sc_auto)
7586 error ("top-level declaration of %qs specifies %<auto%>", name);
7589 && storage_class != sc_extern
7590 && storage_class != sc_static)
7592 error ("function-scope %qs implicitly auto and declared %<__thread%>",
7597 if (storage_class && friendp)
7598 error ("storage class specifiers invalid in friend function declarations");
7601 unqualified_id = NULL_TREE;
7604 unqualified_id = id_declarator->u.id.unqualified_name;
7605 switch (TREE_CODE (unqualified_id))
7609 = constructor_name (TREE_OPERAND (unqualified_id, 0));
7612 case IDENTIFIER_NODE:
7613 case TEMPLATE_ID_EXPR:
7621 /* Determine the type of the entity declared by recurring on the
7623 for (; declarator; declarator = declarator->declarator)
7625 const cp_declarator *inner_declarator;
7628 if (type == error_mark_node)
7629 return error_mark_node;
7631 attrs = declarator->attributes;
7637 if (declarator == NULL || declarator->kind == cdk_id)
7638 attr_flags |= (int) ATTR_FLAG_DECL_NEXT;
7639 if (declarator->kind == cdk_function)
7640 attr_flags |= (int) ATTR_FLAG_FUNCTION_NEXT;
7641 if (declarator->kind == cdk_array)
7642 attr_flags |= (int) ATTR_FLAG_ARRAY_NEXT;
7643 returned_attrs = decl_attributes (&type,
7644 chainon (returned_attrs, attrs),
7648 if (declarator->kind == cdk_id)
7651 inner_declarator = declarator->declarator;
7653 switch (declarator->kind)
7656 type = create_array_type_for_decl (dname, type,
7657 declarator->u.array.bounds);
7665 /* Declaring a function type.
7666 Make sure we have a valid type for the function to return. */
7668 if (type_quals != TYPE_UNQUALIFIED)
7670 if (SCALAR_TYPE_P (type) || VOID_TYPE_P (type))
7671 warning (OPT_Wreturn_type,
7672 "type qualifiers ignored on function return type");
7673 /* We now know that the TYPE_QUALS don't apply to the
7674 decl, but to its return type. */
7675 type_quals = TYPE_UNQUALIFIED;
7676 set_no_warning = true;
7679 /* Warn about some types functions can't return. */
7681 if (TREE_CODE (type) == FUNCTION_TYPE)
7683 error ("%qs declared as function returning a function", name);
7684 type = integer_type_node;
7686 if (TREE_CODE (type) == ARRAY_TYPE)
7688 error ("%qs declared as function returning an array", name);
7689 type = integer_type_node;
7692 /* Pick up type qualifiers which should be applied to `this'. */
7693 memfn_quals = declarator->u.function.qualifiers;
7695 /* Pick up the exception specifications. */
7696 raises = declarator->u.function.exception_specification;
7698 /* Say it's a definition only for the CALL_EXPR
7699 closest to the identifier. */
7700 funcdecl_p = inner_declarator && inner_declarator->kind == cdk_id;
7702 if (ctype == NULL_TREE
7703 && decl_context == FIELD
7705 && (friendp == 0 || dname == current_class_name))
7706 ctype = current_class_type;
7708 if (ctype && (sfk == sfk_constructor
7709 || sfk == sfk_destructor))
7711 /* We are within a class's scope. If our declarator name
7712 is the same as the class name, and we are defining
7713 a function, then it is a constructor/destructor, and
7714 therefore returns a void type. */
7716 /* ISO C++ 12.4/2. A destructor may not be declared
7717 const or volatile. A destructor may not be
7720 ISO C++ 12.1. A constructor may not be declared
7721 const or volatile. A constructor may not be
7722 virtual. A constructor may not be static. */
7724 error ((flags == DTOR_FLAG)
7725 ? "destructor cannot be static member function"
7726 : "constructor cannot be static member function");
7729 error ((flags == DTOR_FLAG)
7730 ? "destructors may not be cv-qualified"
7731 : "constructors may not be cv-qualified");
7732 memfn_quals = TYPE_UNQUALIFIED;
7735 if (decl_context == FIELD
7736 && !member_function_or_else (ctype,
7739 return error_mark_node;
7741 if (flags != DTOR_FLAG)
7743 /* It's a constructor. */
7748 pedwarn ("constructors cannot be declared virtual");
7751 if (decl_context == FIELD
7752 && sfk != sfk_constructor)
7753 return error_mark_node;
7755 if (decl_context == FIELD)
7761 error ("can't initialize friend function %qs", name);
7764 /* Cannot be both friend and virtual. */
7765 error ("virtual functions cannot be friends");
7768 if (decl_context == NORMAL)
7769 error ("friend declaration not in class definition");
7770 if (current_function_decl && funcdef_flag)
7771 error ("can't define friend function %qs in a local "
7776 arg_types = grokparms (declarator->u.function.parameters,
7779 if (inner_declarator
7780 && inner_declarator->kind == cdk_id
7781 && inner_declarator->u.id.sfk == sfk_destructor
7782 && arg_types != void_list_node)
7784 error ("destructors may not have parameters");
7785 arg_types = void_list_node;
7789 type = build_function_type (type, arg_types);
7796 /* Filter out pointers-to-references and references-to-references.
7797 We can get these if a TYPE_DECL is used. */
7799 if (TREE_CODE (type) == REFERENCE_TYPE)
7801 if (declarator->kind != cdk_reference)
7803 error ("cannot declare pointer to %q#T", type);
7804 type = TREE_TYPE (type);
7807 /* In C++0x, we allow reference to reference declarations
7808 that occur indirectly through typedefs [7.1.3/8 dcl.typedef]
7809 and template type arguments [14.3.1/4 temp.arg.type]. The
7810 check for direct reference to reference declarations, which
7811 are still forbidden, occurs below. Reasoning behind the change
7812 can be found in DR106, DR540, and the rvalue reference
7814 else if (!flag_cpp0x)
7816 error ("cannot declare reference to %q#T", type);
7817 type = TREE_TYPE (type);
7820 else if (VOID_TYPE_P (type))
7822 if (declarator->kind == cdk_reference)
7823 error ("cannot declare reference to %q#T", type);
7824 else if (declarator->kind == cdk_ptrmem)
7825 error ("cannot declare pointer to %q#T member", type);
7828 /* We now know that the TYPE_QUALS don't apply to the decl,
7829 but to the target of the pointer. */
7830 type_quals = TYPE_UNQUALIFIED;
7832 if (declarator->kind == cdk_ptrmem
7833 && (TREE_CODE (type) == FUNCTION_TYPE || memfn_quals))
7835 memfn_quals |= cp_type_quals (type);
7836 type = build_memfn_type (type,
7837 declarator->u.pointer.class_type,
7839 memfn_quals = TYPE_UNQUALIFIED;
7842 if (declarator->kind == cdk_reference)
7844 /* In C++0x, the type we are creating a reference to might be
7845 a typedef which is itself a reference type. In that case,
7846 we follow the reference collapsing rules in
7847 [7.1.3/8 dcl.typedef] to create the final reference type:
7849 "If a typedef TD names a type that is a reference to a type
7850 T, an attempt to create the type 'lvalue reference to cv TD'
7851 creates the type 'lvalue reference to T,' while an attempt
7852 to create the type "rvalue reference to cv TD' creates the
7855 if (!VOID_TYPE_P (type))
7856 type = cp_build_reference_type
7857 ((TREE_CODE (type) == REFERENCE_TYPE
7858 ? TREE_TYPE (type) : type),
7859 (declarator->u.reference.rvalue_ref
7860 && (TREE_CODE(type) != REFERENCE_TYPE
7861 || TYPE_REF_IS_RVALUE (type))));
7863 /* In C++0x, we need this check for direct reference to
7864 reference declarations, which are forbidden by
7865 [8.3.2/5 dcl.ref]. Reference to reference declarations
7866 are only allowed indirectly through typedefs and template
7867 type arguments. Example:
7869 void foo(int & &); // invalid ref-to-ref decl
7871 typedef int & int_ref;
7872 void foo(int_ref &); // valid ref-to-ref decl
7874 if (inner_declarator && inner_declarator->kind == cdk_reference)
7875 error ("cannot declare reference to %q#T, which is not "
7876 "a typedef or a template type argument", type);
7878 else if (TREE_CODE (type) == METHOD_TYPE)
7879 type = build_ptrmemfunc_type (build_pointer_type (type));
7880 else if (declarator->kind == cdk_ptrmem)
7882 gcc_assert (TREE_CODE (declarator->u.pointer.class_type)
7884 if (declarator->u.pointer.class_type == error_mark_node)
7885 /* We will already have complained. */
7886 type = error_mark_node;
7888 type = build_ptrmem_type (declarator->u.pointer.class_type,
7892 type = build_pointer_type (type);
7894 /* Process a list of type modifier keywords (such as
7895 const or volatile) that were given inside the `*' or `&'. */
7897 if (declarator->u.pointer.qualifiers)
7900 = cp_build_qualified_type (type,
7901 declarator->u.pointer.qualifiers);
7902 type_quals = cp_type_quals (type);
7915 if (unqualified_id && TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR
7916 && TREE_CODE (type) != FUNCTION_TYPE
7917 && TREE_CODE (type) != METHOD_TYPE)
7919 error ("template-id %qD used as a declarator",
7921 unqualified_id = dname;
7924 /* If TYPE is a FUNCTION_TYPE, but the function name was explicitly
7925 qualified with a class-name, turn it into a METHOD_TYPE, unless
7926 we know that the function is static. We take advantage of this
7927 opportunity to do other processing that pertains to entities
7928 explicitly declared to be class members. Note that if DECLARATOR
7929 is non-NULL, we know it is a cdk_id declarator; otherwise, we
7930 would not have exited the loop above. */
7932 && declarator->u.id.qualifying_scope
7933 && TYPE_P (declarator->u.id.qualifying_scope))
7937 ctype = declarator->u.id.qualifying_scope;
7938 ctype = TYPE_MAIN_VARIANT (ctype);
7940 while (t != NULL_TREE && CLASS_TYPE_P (t))
7942 /* You're supposed to have one `template <...>' for every
7943 template class, but you don't need one for a full
7944 specialization. For example:
7946 template <class T> struct S{};
7947 template <> struct S<int> { void f(); };
7948 void S<int>::f () {}
7950 is correct; there shouldn't be a `template <>' for the
7951 definition of `S<int>::f'. */
7952 if (CLASSTYPE_TEMPLATE_SPECIALIZATION (t)
7953 && !any_dependent_template_arguments_p (CLASSTYPE_TI_ARGS (t)))
7954 /* T is an explicit (not partial) specialization. All
7955 containing classes must therefore also be explicitly
7958 if ((CLASSTYPE_USE_TEMPLATE (t) || CLASSTYPE_IS_TEMPLATE (t))
7959 && PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (t)))
7960 template_count += 1;
7962 t = TYPE_MAIN_DECL (t);
7963 t = DECL_CONTEXT (t);
7966 if (ctype == current_class_type)
7969 pedwarn ("member functions are implicitly friends of their class");
7971 pedwarn ("extra qualification %<%T::%> on member %qs",
7974 else if (/* If the qualifying type is already complete, then we
7975 can skip the following checks. */
7976 !COMPLETE_TYPE_P (ctype)
7977 && (/* If the function is being defined, then
7978 qualifying type must certainly be complete. */
7980 /* A friend declaration of "T::f" is OK, even if
7981 "T" is a template parameter. But, if this
7982 function is not a friend, the qualifying type
7984 || (!friendp && !CLASS_TYPE_P (ctype))
7985 /* For a declaration, the type need not be
7986 complete, if either it is dependent (since there
7987 is no meaningful definition of complete in that
7988 case) or the qualifying class is currently being
7990 || !(dependent_type_p (ctype)
7991 || currently_open_class (ctype)))
7992 /* Check that the qualifying type is complete. */
7993 && !complete_type_or_else (ctype, NULL_TREE))
7994 return error_mark_node;
7995 else if (TREE_CODE (type) == FUNCTION_TYPE)
7997 tree sname = declarator->u.id.unqualified_name;
7999 if (current_class_type
8000 && (!friendp || funcdef_flag))
8003 ? "cannot define member function %<%T::%s%> within %<%T%>"
8004 : "cannot declare member function %<%T::%s%> within %<%T%>",
8005 ctype, name, current_class_type);
8006 return error_mark_node;
8009 if (TREE_CODE (sname) == IDENTIFIER_NODE
8010 && NEW_DELETE_OPNAME_P (sname))
8011 /* Overloaded operator new and operator delete
8012 are always static functions. */
8015 type = build_memfn_type (type, ctype, memfn_quals);
8017 else if (declspecs->specs[(int)ds_typedef]
8018 && current_class_type)
8020 error ("cannot declare member %<%T::%s%> within %qT",
8021 ctype, name, current_class_type);
8022 return error_mark_node;
8026 /* Now TYPE has the actual type. */
8031 *attrlist = chainon (returned_attrs, *attrlist);
8033 attrlist = &returned_attrs;
8036 /* Handle parameter packs. */
8037 if (parameter_pack_p)
8039 if (decl_context == PARM)
8040 /* Turn the type into a pack expansion.*/
8041 type = make_pack_expansion (type);
8043 error ("non-parameter %qs cannot be a parameter pack", name);
8046 /* Did array size calculations overflow? */
8048 if (TREE_CODE (type) == ARRAY_TYPE
8049 && COMPLETE_TYPE_P (type)
8050 && TREE_CODE (TYPE_SIZE_UNIT (type)) == INTEGER_CST
8051 && TREE_OVERFLOW (TYPE_SIZE_UNIT (type)))
8053 error ("size of array %qs is too large", name);
8054 /* If we proceed with the array type as it is, we'll eventually
8055 crash in tree_low_cst(). */
8056 type = error_mark_node;
8059 if ((decl_context == FIELD || decl_context == PARM)
8060 && !processing_template_decl
8061 && variably_modified_type_p (type, NULL_TREE))
8063 if (decl_context == FIELD)
8064 error ("data member may not have variably modified type %qT", type);
8066 error ("parameter may not have variably modified type %qT", type);
8067 type = error_mark_node;
8070 if (explicitp == 1 || (explicitp && friendp))
8072 /* [dcl.fct.spec] The explicit specifier shall only be used in
8073 declarations of constructors within a class definition. */
8074 error ("only declarations of constructors can be %<explicit%>");
8078 if (storage_class == sc_mutable)
8080 if (decl_context != FIELD || friendp)
8082 error ("non-member %qs cannot be declared %<mutable%>", name);
8083 storage_class = sc_none;
8085 else if (decl_context == TYPENAME || declspecs->specs[(int)ds_typedef])
8087 error ("non-object member %qs cannot be declared %<mutable%>", name);
8088 storage_class = sc_none;
8090 else if (TREE_CODE (type) == FUNCTION_TYPE
8091 || TREE_CODE (type) == METHOD_TYPE)
8093 error ("function %qs cannot be declared %<mutable%>", name);
8094 storage_class = sc_none;
8098 error ("static %qs cannot be declared %<mutable%>", name);
8099 storage_class = sc_none;
8101 else if (type_quals & TYPE_QUAL_CONST)
8103 error ("const %qs cannot be declared %<mutable%>", name);
8104 storage_class = sc_none;
8108 /* If this is declaring a typedef name, return a TYPE_DECL. */
8109 if (declspecs->specs[(int)ds_typedef] && decl_context != TYPENAME)
8113 /* Note that the grammar rejects storage classes
8114 in typenames, fields or parameters. */
8115 if (current_lang_name == lang_name_java)
8116 TYPE_FOR_JAVA (type) = 1;
8118 /* This declaration:
8120 typedef void f(int) const;
8122 declares a function type which is not a member of any
8123 particular class, but which is cv-qualified; for
8124 example "f S::*" declares a pointer to a const-qualified
8125 member function of S. We record the cv-qualification in the
8127 if (memfn_quals && TREE_CODE (type) == FUNCTION_TYPE)
8129 type = cp_build_qualified_type (type, memfn_quals);
8131 /* We have now dealt with these qualifiers. */
8132 memfn_quals = TYPE_UNQUALIFIED;
8135 if (decl_context == FIELD)
8136 decl = build_lang_decl (TYPE_DECL, unqualified_id, type);
8138 decl = build_decl (TYPE_DECL, unqualified_id, type);
8139 if (id_declarator && declarator->u.id.qualifying_scope)
8140 error ("%Jtypedef name may not be a nested-name-specifier", decl);
8142 if (decl_context != FIELD)
8144 if (!current_function_decl)
8145 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
8146 else if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (current_function_decl)
8147 || (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P
8148 (current_function_decl)))
8149 /* The TYPE_DECL is "abstract" because there will be
8150 clones of this constructor/destructor, and there will
8151 be copies of this TYPE_DECL generated in those
8153 DECL_ABSTRACT (decl) = 1;
8155 else if (constructor_name_p (unqualified_id, current_class_type))
8156 pedwarn ("ISO C++ forbids nested type %qD with same name "
8157 "as enclosing class",
8160 /* If the user declares "typedef struct {...} foo" then the
8161 struct will have an anonymous name. Fill that name in now.
8162 Nothing can refer to it, so nothing needs know about the name
8164 if (type != error_mark_node
8167 && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
8168 && TYPE_ANONYMOUS_P (type)
8169 /* Don't do this if there are attributes. */
8170 && (!attrlist || !*attrlist)
8171 && cp_type_quals (type) == TYPE_UNQUALIFIED)
8173 tree oldname = TYPE_NAME (type);
8176 /* Replace the anonymous name with the real name everywhere. */
8177 for (t = TYPE_MAIN_VARIANT (type); t; t = TYPE_NEXT_VARIANT (t))
8178 if (TYPE_NAME (t) == oldname)
8179 TYPE_NAME (t) = decl;
8181 if (TYPE_LANG_SPECIFIC (type))
8182 TYPE_WAS_ANONYMOUS (type) = 1;
8184 /* If this is a typedef within a template class, the nested
8185 type is a (non-primary) template. The name for the
8186 template needs updating as well. */
8187 if (TYPE_LANG_SPECIFIC (type) && CLASSTYPE_TEMPLATE_INFO (type))
8188 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type))
8189 = TYPE_IDENTIFIER (type);
8191 /* FIXME remangle member functions; member functions of a
8192 type with external linkage have external linkage. */
8196 || (typedef_decl && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl)))
8197 C_TYPEDEF_EXPLICITLY_SIGNED (decl) = 1;
8199 bad_specifiers (decl, "type", virtualp,
8200 memfn_quals != TYPE_UNQUALIFIED,
8201 inlinep, friendp, raises != NULL_TREE);
8206 /* Detect the case of an array type of unspecified size
8207 which came, as such, direct from a typedef name.
8208 We must copy the type, so that the array's domain can be
8209 individually set by the object's initializer. */
8211 if (type && typedef_type
8212 && TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type)
8213 && TYPE_MAIN_VARIANT (type) == TYPE_MAIN_VARIANT (typedef_type))
8214 type = build_cplus_array_type (TREE_TYPE (type), NULL_TREE);
8216 /* Detect where we're using a typedef of function type to declare a
8217 function. PARMS will not be set, so we must create it now. */
8219 if (type == typedef_type && TREE_CODE (type) == FUNCTION_TYPE)
8221 tree decls = NULL_TREE;
8224 for (args = TYPE_ARG_TYPES (type); args; args = TREE_CHAIN (args))
8226 tree decl = cp_build_parm_decl (NULL_TREE, TREE_VALUE (args));
8228 TREE_CHAIN (decl) = decls;
8232 parms = nreverse (decls);
8234 if (decl_context != TYPENAME)
8236 /* A cv-qualifier-seq shall only be part of the function type
8237 for a non-static member function. [8.3.5/4 dcl.fct] */
8238 if (cp_type_quals (type) != TYPE_UNQUALIFIED
8239 && (current_class_type == NULL_TREE || staticp) )
8242 ? G_("qualified function types cannot be used to "
8243 "declare static member functions")
8244 : G_("qualified function types cannot be used to "
8245 "declare free functions"));
8246 type = TYPE_MAIN_VARIANT (type);
8249 /* The qualifiers on the function type become the qualifiers on
8250 the non-static member function. */
8251 memfn_quals |= cp_type_quals (type);
8255 /* If this is a type name (such as, in a cast or sizeof),
8256 compute the type and return it now. */
8258 if (decl_context == TYPENAME)
8260 /* Note that the grammar rejects storage classes
8261 in typenames, fields or parameters. */
8262 if (type_quals != TYPE_UNQUALIFIED)
8263 type_quals = TYPE_UNQUALIFIED;
8265 /* Special case: "friend class foo" looks like a TYPENAME context. */
8268 if (type_quals != TYPE_UNQUALIFIED)
8270 error ("type qualifiers specified for friend class declaration");
8271 type_quals = TYPE_UNQUALIFIED;
8275 error ("%<inline%> specified for friend class declaration");
8281 /* Don't allow friend declaration without a class-key. */
8282 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
8283 pedwarn ("template parameters cannot be friends");
8284 else if (TREE_CODE (type) == TYPENAME_TYPE)
8285 pedwarn ("friend declaration requires class-key, "
8286 "i.e. %<friend class %T::%D%>",
8287 TYPE_CONTEXT (type), TYPENAME_TYPE_FULLNAME (type));
8289 pedwarn ("friend declaration requires class-key, "
8290 "i.e. %<friend %#T%>",
8294 /* Only try to do this stuff if we didn't already give up. */
8295 if (type != integer_type_node)
8297 /* A friendly class? */
8298 if (current_class_type)
8299 make_friend_class (current_class_type, TYPE_MAIN_VARIANT (type),
8302 error ("trying to make class %qT a friend of global scope",
8305 type = void_type_node;
8308 else if (memfn_quals)
8310 if (ctype == NULL_TREE)
8312 if (TREE_CODE (type) != METHOD_TYPE)
8313 error ("invalid qualifiers on non-member function type");
8315 ctype = TYPE_METHOD_BASETYPE (type);
8318 type = build_memfn_type (type, ctype, memfn_quals);
8323 else if (unqualified_id == NULL_TREE && decl_context != PARM
8324 && decl_context != CATCHPARM
8325 && TREE_CODE (type) != UNION_TYPE
8328 error ("abstract declarator %qT used as declaration", type);
8329 return error_mark_node;
8332 /* Only functions may be declared using an operator-function-id. */
8334 && IDENTIFIER_OPNAME_P (unqualified_id)
8335 && TREE_CODE (type) != FUNCTION_TYPE
8336 && TREE_CODE (type) != METHOD_TYPE)
8338 error ("declaration of %qD as non-function", unqualified_id);
8339 return error_mark_node;
8342 /* We don't check parameter types here because we can emit a better
8343 error message later. */
8344 if (decl_context != PARM)
8346 type = check_var_type (unqualified_id, type);
8347 if (type == error_mark_node)
8348 return error_mark_node;
8351 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
8352 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
8354 if (decl_context == PARM || decl_context == CATCHPARM)
8356 if (ctype || in_namespace)
8357 error ("cannot use %<::%> in parameter declaration");
8359 /* A parameter declared as an array of T is really a pointer to T.
8360 One declared as a function is really a pointer to a function.
8361 One declared as a member is really a pointer to member. */
8363 if (TREE_CODE (type) == ARRAY_TYPE)
8365 /* Transfer const-ness of array into that of type pointed to. */
8366 type = build_pointer_type (TREE_TYPE (type));
8367 type_quals = TYPE_UNQUALIFIED;
8369 else if (TREE_CODE (type) == FUNCTION_TYPE)
8370 type = build_pointer_type (type);
8376 if (decl_context == PARM)
8378 decl = cp_build_parm_decl (unqualified_id, type);
8380 bad_specifiers (decl, "parameter", virtualp,
8381 memfn_quals != TYPE_UNQUALIFIED,
8382 inlinep, friendp, raises != NULL_TREE);
8384 else if (decl_context == FIELD)
8386 /* The C99 flexible array extension. */
8387 if (!staticp && TREE_CODE (type) == ARRAY_TYPE
8388 && TYPE_DOMAIN (type) == NULL_TREE)
8390 tree itype = compute_array_index_type (dname, integer_zero_node);
8391 type = build_cplus_array_type (TREE_TYPE (type), itype);
8394 if (type == error_mark_node)
8396 /* Happens when declaring arrays of sizes which
8397 are error_mark_node, for example. */
8400 else if (in_namespace && !friendp)
8402 /* Something like struct S { int N::j; }; */
8403 error ("invalid use of %<::%>");
8404 return error_mark_node;
8406 else if (TREE_CODE (type) == FUNCTION_TYPE)
8409 tree function_context;
8413 if (ctype == NULL_TREE)
8414 ctype = current_class_type;
8416 if (ctype == NULL_TREE)
8418 error ("can't make %qD into a method -- not in a class",
8420 return error_mark_node;
8423 /* ``A union may [ ... ] not [ have ] virtual functions.''
8425 if (virtualp && TREE_CODE (ctype) == UNION_TYPE)
8427 error ("function %qD declared virtual inside a union",
8429 return error_mark_node;
8432 if (NEW_DELETE_OPNAME_P (unqualified_id))
8436 error ("%qD cannot be declared virtual, since it "
8442 else if (staticp < 2)
8443 type = build_memfn_type (type, ctype, memfn_quals);
8446 /* Check that the name used for a destructor makes sense. */
8447 if (sfk == sfk_destructor)
8451 gcc_assert (friendp);
8452 error ("expected qualified name in friend declaration "
8453 "for destructor %qD",
8454 id_declarator->u.id.unqualified_name);
8455 return error_mark_node;
8458 if (!same_type_p (TREE_OPERAND
8459 (id_declarator->u.id.unqualified_name, 0),
8462 error ("declaration of %qD as member of %qT",
8463 id_declarator->u.id.unqualified_name, ctype);
8464 return error_mark_node;
8468 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
8469 function_context = (ctype != NULL_TREE) ?
8470 decl_function_context (TYPE_MAIN_DECL (ctype)) : NULL_TREE;
8471 publicp = (! friendp || ! staticp)
8472 && function_context == NULL_TREE;
8473 decl = grokfndecl (ctype, type,
8474 TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
8475 ? unqualified_id : dname,
8478 virtualp, flags, memfn_quals, raises,
8479 friendp ? -1 : 0, friendp, publicp, inlinep,
8481 funcdef_flag, template_count, in_namespace, attrlist);
8482 if (decl == NULL_TREE)
8483 return error_mark_node;
8485 /* This clobbers the attrs stored in `decl' from `attrlist'. */
8486 /* The decl and setting of decl_attr is also turned off. */
8487 decl = build_decl_attribute_variant (decl, decl_attr);
8490 /* [class.conv.ctor]
8492 A constructor declared without the function-specifier
8493 explicit that can be called with a single parameter
8494 specifies a conversion from the type of its first
8495 parameter to the type of its class. Such a constructor
8496 is called a converting constructor. */
8498 DECL_NONCONVERTING_P (decl) = 1;
8499 else if (DECL_CONSTRUCTOR_P (decl))
8501 /* The constructor can be called with exactly one
8502 parameter if there is at least one parameter, and
8503 any subsequent parameters have default arguments.
8504 Ignore any compiler-added parms. */
8505 tree arg_types = FUNCTION_FIRST_USER_PARMTYPE (decl);
8507 if (arg_types == void_list_node
8509 && TREE_CHAIN (arg_types)
8510 && TREE_CHAIN (arg_types) != void_list_node
8511 && !TREE_PURPOSE (TREE_CHAIN (arg_types))))
8512 DECL_NONCONVERTING_P (decl) = 1;
8515 else if (TREE_CODE (type) == METHOD_TYPE)
8517 /* We only get here for friend declarations of
8518 members of other classes. */
8519 /* All method decls are public, so tell grokfndecl to set
8520 TREE_PUBLIC, also. */
8521 decl = grokfndecl (ctype, type,
8522 TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
8523 ? unqualified_id : dname,
8526 virtualp, flags, memfn_quals, raises,
8527 friendp ? -1 : 0, friendp, 1, 0, sfk,
8528 funcdef_flag, template_count, in_namespace,
8530 if (decl == NULL_TREE)
8531 return error_mark_node;
8533 else if (!staticp && !dependent_type_p (type)
8534 && !COMPLETE_TYPE_P (complete_type (type))
8535 && (TREE_CODE (type) != ARRAY_TYPE || initialized == 0))
8538 error ("field %qD has incomplete type", unqualified_id);
8540 error ("name %qT has incomplete type", type);
8542 /* If we're instantiating a template, tell them which
8543 instantiation made the field's type be incomplete. */
8544 if (current_class_type
8545 && TYPE_NAME (current_class_type)
8546 && IDENTIFIER_TEMPLATE (TYPE_IDENTIFIER (current_class_type))
8548 && declspecs->type == type)
8549 error (" in instantiation of template %qT",
8550 current_class_type);
8552 return error_mark_node;
8558 error ("%qE is neither function nor member function; "
8559 "cannot be declared friend", unqualified_id);
8567 /* Friends are treated specially. */
8568 if (ctype == current_class_type)
8569 ; /* We already issued a pedwarn. */
8570 else if (decl && DECL_NAME (decl))
8572 if (template_class_depth (current_class_type) == 0)
8574 decl = check_explicit_specialization
8575 (unqualified_id, decl, template_count,
8576 2 * funcdef_flag + 4);
8577 if (decl == error_mark_node)
8578 return error_mark_node;
8581 decl = do_friend (ctype, unqualified_id, decl,
8587 return error_mark_node;
8590 /* Structure field. It may not be a function, except for C++. */
8592 if (decl == NULL_TREE)
8598 /* An attempt is being made to initialize a non-static
8599 member. But, from [class.mem]:
8601 4 A member-declarator can contain a
8602 constant-initializer only if it declares a static
8603 member (_class.static_) of integral or enumeration
8604 type, see _class.static.data_.
8606 This used to be relatively common practice, but
8607 the rest of the compiler does not correctly
8608 handle the initialization unless the member is
8609 static so we make it static below. */
8610 pedwarn ("ISO C++ forbids initialization of member %qD",
8612 pedwarn ("making %qD static", unqualified_id);
8616 if (uses_template_parms (type))
8617 /* We'll check at instantiation time. */
8619 else if (check_static_variable_definition (unqualified_id,
8621 /* If we just return the declaration, crashes
8622 will sometimes occur. We therefore return
8623 void_type_node, as if this was a friend
8624 declaration, to cause callers to completely
8625 ignore this declaration. */
8626 return error_mark_node;
8631 /* C++ allows static class members. All other work
8632 for this is done by grokfield. */
8633 decl = build_lang_decl (VAR_DECL, unqualified_id, type);
8634 set_linkage_for_static_data_member (decl);
8635 /* Even if there is an in-class initialization, DECL
8636 is considered undefined until an out-of-class
8637 definition is provided. */
8638 DECL_EXTERNAL (decl) = 1;
8641 DECL_TLS_MODEL (decl) = decl_default_tls_model (decl);
8645 decl = build_decl (FIELD_DECL, unqualified_id, type);
8646 DECL_NONADDRESSABLE_P (decl) = bitfield;
8647 if (bitfield && !unqualified_id)
8648 TREE_NO_WARNING (decl) = 1;
8650 if (storage_class == sc_mutable)
8652 DECL_MUTABLE_P (decl) = 1;
8653 storage_class = sc_none;
8657 bad_specifiers (decl, "field", virtualp,
8658 memfn_quals != TYPE_UNQUALIFIED,
8659 inlinep, friendp, raises != NULL_TREE);
8662 else if (TREE_CODE (type) == FUNCTION_TYPE
8663 || TREE_CODE (type) == METHOD_TYPE)
8668 if (!unqualified_id)
8669 return error_mark_node;
8671 if (TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR)
8672 original_name = dname;
8674 original_name = unqualified_id;
8676 if (storage_class == sc_auto)
8677 error ("storage class %<auto%> invalid for function %qs", name);
8678 else if (storage_class == sc_register)
8679 error ("storage class %<register%> invalid for function %qs", name);
8681 error ("storage class %<__thread%> invalid for function %qs", name);
8683 /* Function declaration not at top level.
8684 Storage classes other than `extern' are not allowed
8685 and `extern' makes no difference. */
8686 if (! toplevel_bindings_p ()
8687 && (storage_class == sc_static
8688 || declspecs->specs[(int)ds_inline])
8691 if (storage_class == sc_static)
8692 pedwarn ("%<static%> specified invalid for function %qs "
8693 "declared out of global scope", name);
8695 pedwarn ("%<inline%> specifier invalid for function %qs "
8696 "declared out of global scope", name);
8699 if (ctype == NULL_TREE)
8703 error ("virtual non-class function %qs", name);
8707 else if (TREE_CODE (type) == FUNCTION_TYPE && staticp < 2
8708 && !NEW_DELETE_OPNAME_P (original_name))
8709 type = build_method_type_directly (ctype,
8711 TYPE_ARG_TYPES (type));
8713 /* Record presence of `static'. */
8714 publicp = (ctype != NULL_TREE
8715 || storage_class == sc_extern
8716 || storage_class != sc_static);
8718 decl = grokfndecl (ctype, type, original_name, parms, unqualified_id,
8719 virtualp, flags, memfn_quals, raises,
8721 publicp, inlinep, sfk, funcdef_flag,
8722 template_count, in_namespace, attrlist);
8723 if (decl == NULL_TREE)
8724 return error_mark_node;
8728 int invalid_static = 0;
8730 /* Don't allow a static member function in a class, and forbid
8731 declaring main to be static. */
8732 if (TREE_CODE (type) == METHOD_TYPE)
8734 pedwarn ("cannot declare member function %qD to have "
8735 "static linkage", decl);
8738 else if (current_function_decl)
8740 /* FIXME need arm citation */
8741 error ("cannot declare static function inside another function");
8748 storage_class = sc_none;
8754 /* It's a variable. */
8756 /* An uninitialized decl with `extern' is a reference. */
8757 decl = grokvardecl (type, unqualified_id,
8760 (type_quals & TYPE_QUAL_CONST) != 0,
8761 ctype ? ctype : in_namespace);
8762 bad_specifiers (decl, "variable", virtualp,
8763 memfn_quals != TYPE_UNQUALIFIED,
8764 inlinep, friendp, raises != NULL_TREE);
8768 DECL_CONTEXT (decl) = ctype;
8771 pedwarn ("%<static%> may not be used when defining "
8772 "(as opposed to declaring) a static data member");
8774 storage_class = sc_none;
8776 if (storage_class == sc_register && TREE_STATIC (decl))
8778 error ("static member %qD declared %<register%>", decl);
8779 storage_class = sc_none;
8781 if (storage_class == sc_extern && pedantic)
8783 pedwarn ("cannot explicitly declare member %q#D to have "
8786 storage_class = sc_none;
8791 /* Record `register' declaration for warnings on &
8792 and in case doing stupid register allocation. */
8794 if (storage_class == sc_register)
8795 DECL_REGISTER (decl) = 1;
8796 else if (storage_class == sc_extern)
8797 DECL_THIS_EXTERN (decl) = 1;
8798 else if (storage_class == sc_static)
8799 DECL_THIS_STATIC (decl) = 1;
8801 /* Record constancy and volatility. There's no need to do this
8802 when processing a template; we'll do this for the instantiated
8803 declaration based on the type of DECL. */
8804 if (!processing_template_decl)
8805 cp_apply_type_quals_to_decl (type_quals, decl);
8808 TREE_NO_WARNING (decl) = 1;
8814 /* Subroutine of start_function. Ensure that each of the parameter
8815 types (as listed in PARMS) is complete, as is required for a
8816 function definition. */
8819 require_complete_types_for_parms (tree parms)
8821 for (; parms; parms = TREE_CHAIN (parms))
8823 if (dependent_type_p (TREE_TYPE (parms)))
8825 if (!VOID_TYPE_P (TREE_TYPE (parms))
8826 && complete_type_or_else (TREE_TYPE (parms), parms))
8828 relayout_decl (parms);
8829 DECL_ARG_TYPE (parms) = type_passed_as (TREE_TYPE (parms));
8832 /* grokparms or complete_type_or_else will have already issued
8834 TREE_TYPE (parms) = error_mark_node;
8838 /* Returns nonzero if T is a local variable. */
8841 local_variable_p (tree t)
8843 if ((TREE_CODE (t) == VAR_DECL
8844 /* A VAR_DECL with a context that is a _TYPE is a static data
8846 && !TYPE_P (CP_DECL_CONTEXT (t))
8847 /* Any other non-local variable must be at namespace scope. */
8848 && !DECL_NAMESPACE_SCOPE_P (t))
8849 || (TREE_CODE (t) == PARM_DECL))
8855 /* Returns nonzero if T is an automatic local variable or a label.
8856 (These are the declarations that need to be remapped when the code
8857 containing them is duplicated.) */
8860 nonstatic_local_decl_p (tree t)
8862 return ((local_variable_p (t) && !TREE_STATIC (t))
8863 || TREE_CODE (t) == LABEL_DECL
8864 || TREE_CODE (t) == RESULT_DECL);
8867 /* Like local_variable_p, but suitable for use as a tree-walking
8871 local_variable_p_walkfn (tree *tp, int *walk_subtrees,
8872 void *data ATTRIBUTE_UNUSED)
8874 if (local_variable_p (*tp) && !DECL_ARTIFICIAL (*tp))
8876 else if (TYPE_P (*tp))
8883 /* Check that ARG, which is a default-argument expression for a
8884 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
8885 something goes wrong. DECL may also be a _TYPE node, rather than a
8886 DECL, if there is no DECL available. */
8889 check_default_argument (tree decl, tree arg)
8894 if (TREE_CODE (arg) == DEFAULT_ARG)
8895 /* We get a DEFAULT_ARG when looking at an in-class declaration
8896 with a default argument. Ignore the argument for now; we'll
8897 deal with it after the class is complete. */
8906 decl_type = TREE_TYPE (decl);
8908 if (arg == error_mark_node
8909 || decl == error_mark_node
8910 || TREE_TYPE (arg) == error_mark_node
8911 || decl_type == error_mark_node)
8912 /* Something already went wrong. There's no need to check
8914 return error_mark_node;
8916 /* [dcl.fct.default]
8918 A default argument expression is implicitly converted to the
8920 if (!TREE_TYPE (arg)
8921 || !can_convert_arg (decl_type, TREE_TYPE (arg), arg, LOOKUP_NORMAL))
8924 error ("default argument for %q#D has type %qT",
8925 decl, TREE_TYPE (arg));
8927 error ("default argument for parameter of type %qT has type %qT",
8928 decl_type, TREE_TYPE (arg));
8930 return error_mark_node;
8933 /* [dcl.fct.default]
8935 Local variables shall not be used in default argument
8938 The keyword `this' shall not be used in a default argument of a
8940 var = walk_tree_without_duplicates (&arg, local_variable_p_walkfn,
8944 error ("default argument %qE uses local variable %qD", arg, var);
8945 return error_mark_node;
8952 /* Decode the list of parameter types for a function type.
8953 Given the list of things declared inside the parens,
8954 return a list of types.
8956 If this parameter does not end with an ellipsis, we append
8959 *PARMS is set to the chain of PARM_DECLs created. */
8962 grokparms (cp_parameter_declarator *first_parm, tree *parms)
8964 tree result = NULL_TREE;
8965 tree decls = NULL_TREE;
8966 int ellipsis = !first_parm || first_parm->ellipsis_p;
8967 cp_parameter_declarator *parm;
8969 struct pointer_set_t *unique_decls = pointer_set_create ();
8971 for (parm = first_parm; parm != NULL; parm = parm->next)
8973 tree type = NULL_TREE;
8974 tree init = parm->default_argument;
8978 if (parm == no_parameters)
8981 attrs = parm->decl_specifiers.attributes;
8982 parm->decl_specifiers.attributes = NULL_TREE;
8983 decl = grokdeclarator (parm->declarator, &parm->decl_specifiers,
8984 PARM, init != NULL_TREE, &attrs);
8985 if (! decl || TREE_TYPE (decl) == error_mark_node)
8989 cplus_decl_attributes (&decl, attrs, 0);
8991 type = TREE_TYPE (decl);
8992 if (VOID_TYPE_P (type))
8994 if (same_type_p (type, void_type_node)
8995 && DECL_SELF_REFERENCE_P (type)
8996 && !DECL_NAME (decl) && !result && !parm->next && !ellipsis)
8997 /* this is a parmlist of `(void)', which is ok. */
8999 cxx_incomplete_type_error (decl, type);
9000 /* It's not a good idea to actually create parameters of
9001 type `void'; other parts of the compiler assume that a
9002 void type terminates the parameter list. */
9003 type = error_mark_node;
9004 TREE_TYPE (decl) = error_mark_node;
9007 if (type != error_mark_node)
9009 /* Top-level qualifiers on the parameters are
9010 ignored for function types. */
9011 type = cp_build_qualified_type (type, 0);
9012 if (TREE_CODE (type) == METHOD_TYPE)
9014 error ("parameter %qD invalidly declared method type", decl);
9015 type = build_pointer_type (type);
9016 TREE_TYPE (decl) = type;
9018 else if (abstract_virtuals_error (decl, type))
9019 any_error = 1; /* Seems like a good idea. */
9020 else if (POINTER_TYPE_P (type))
9022 /* [dcl.fct]/6, parameter types cannot contain pointers
9023 (references) to arrays of unknown bound. */
9024 tree t = TREE_TYPE (type);
9025 int ptr = TYPE_PTR_P (type);
9031 else if (TREE_CODE (t) != ARRAY_TYPE)
9033 else if (!TYPE_DOMAIN (t))
9037 if (TREE_CODE (t) == ARRAY_TYPE)
9038 error ("parameter %qD includes %s to array of unknown "
9040 decl, ptr ? "pointer" : "reference", t);
9045 else if (init && !processing_template_decl)
9046 init = check_default_argument (decl, init);
9049 if (TREE_CODE (decl) == PARM_DECL
9050 && FUNCTION_PARAMETER_PACK_P (decl)
9052 error ("parameter packs must be at the end of the parameter list");
9054 if (DECL_NAME (decl))
9056 if (pointer_set_contains (unique_decls, DECL_NAME (decl)))
9057 error ("multiple parameters named %qE", DECL_NAME (decl));
9059 pointer_set_insert (unique_decls, DECL_NAME (decl));
9062 TREE_CHAIN (decl) = decls;
9064 result = tree_cons (init, type, result);
9066 decls = nreverse (decls);
9067 result = nreverse (result);
9069 result = chainon (result, void_list_node);
9072 pointer_set_destroy (unique_decls);
9077 /* D is a constructor or overloaded `operator='.
9079 Let T be the class in which D is declared. Then, this function
9082 -1 if D's is an ill-formed constructor or copy assignment operator
9083 whose first parameter is of type `T'.
9084 0 if D is not a copy constructor or copy assignment
9086 1 if D is a copy constructor or copy assignment operator whose
9087 first parameter is a reference to const qualified T.
9088 2 if D is a copy constructor or copy assignment operator whose
9089 first parameter is a reference to non-const qualified T.
9091 This function can be used as a predicate. Positive values indicate
9092 a copy constructor and nonzero values indicate a copy assignment
9102 gcc_assert (DECL_FUNCTION_MEMBER_P (d));
9104 if (TREE_CODE (d) == TEMPLATE_DECL
9105 || (DECL_TEMPLATE_INFO (d)
9106 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d))))
9107 /* Instantiations of template member functions are never copy
9108 functions. Note that member functions of templated classes are
9109 represented as template functions internally, and we must
9110 accept those as copy functions. */
9113 args = FUNCTION_FIRST_USER_PARMTYPE (d);
9117 arg_type = TREE_VALUE (args);
9118 if (arg_type == error_mark_node)
9121 if (TYPE_MAIN_VARIANT (arg_type) == DECL_CONTEXT (d))
9123 /* Pass by value copy assignment operator. */
9126 else if (TREE_CODE (arg_type) == REFERENCE_TYPE
9127 && !TYPE_REF_IS_RVALUE (arg_type)
9128 && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type)) == DECL_CONTEXT (d))
9130 if (CP_TYPE_CONST_P (TREE_TYPE (arg_type)))
9136 args = TREE_CHAIN (args);
9138 if (args && args != void_list_node && !TREE_PURPOSE (args))
9139 /* There are more non-optional args. */
9145 /* D is a constructor or overloaded `operator='.
9147 Let T be the class in which D is declared. Then, this function
9148 returns true when D is a move constructor or move assignment
9149 operator, false otherwise. */
9156 bool result = false;
9158 gcc_assert (DECL_FUNCTION_MEMBER_P (d));
9161 /* There are no move constructors if we aren't in C++0x mode. */
9164 if (TREE_CODE (d) == TEMPLATE_DECL
9165 || (DECL_TEMPLATE_INFO (d)
9166 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d))))
9167 /* Instantiations of template member functions are never copy
9168 functions. Note that member functions of templated classes are
9169 represented as template functions internally, and we must
9170 accept those as copy functions. */
9173 args = FUNCTION_FIRST_USER_PARMTYPE (d);
9177 arg_type = TREE_VALUE (args);
9178 if (arg_type == error_mark_node)
9181 if (TREE_CODE (arg_type) == REFERENCE_TYPE
9182 && TYPE_REF_IS_RVALUE (arg_type)
9183 && same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (arg_type)),
9187 args = TREE_CHAIN (args);
9189 if (args && args != void_list_node && !TREE_PURPOSE (args))
9190 /* There are more non-optional args. */
9196 /* Remember any special properties of member function DECL. */
9198 void grok_special_member_properties (tree decl)
9202 if (!DECL_NONSTATIC_MEMBER_FUNCTION_P (decl))
9205 class_type = DECL_CONTEXT (decl);
9206 if (DECL_CONSTRUCTOR_P (decl))
9208 int ctor = copy_fn_p (decl);
9210 TYPE_HAS_CONSTRUCTOR (class_type) = 1;
9216 A non-template constructor for class X is a copy
9217 constructor if its first parameter is of type X&, const
9218 X&, volatile X& or const volatile X&, and either there
9219 are no other parameters or else all other parameters have
9220 default arguments. */
9221 TYPE_HAS_INIT_REF (class_type) = 1;
9223 TYPE_HAS_CONST_INIT_REF (class_type) = 1;
9225 else if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl)))
9226 TYPE_HAS_DEFAULT_CONSTRUCTOR (class_type) = 1;
9228 else if (DECL_OVERLOADED_OPERATOR_P (decl) == NOP_EXPR)
9232 A non-template assignment operator for class X is a copy
9233 assignment operator if its parameter is of type X, X&, const
9234 X&, volatile X& or const volatile X&. */
9236 int assop = copy_fn_p (decl);
9240 TYPE_HAS_ASSIGN_REF (class_type) = 1;
9242 TYPE_HAS_CONST_ASSIGN_REF (class_type) = 1;
9247 /* Check a constructor DECL has the correct form. Complains
9248 if the class has a constructor of the form X(X). */
9251 grok_ctor_properties (tree ctype, tree decl)
9253 int ctor_parm = copy_fn_p (decl);
9259 A declaration of a constructor for a class X is ill-formed if
9260 its first parameter is of type (optionally cv-qualified) X
9261 and either there are no other parameters or else all other
9262 parameters have default arguments.
9264 We *don't* complain about member template instantiations that
9265 have this form, though; they can occur as we try to decide
9266 what constructor to use during overload resolution. Since
9267 overload resolution will never prefer such a constructor to
9268 the non-template copy constructor (which is either explicitly
9269 or implicitly defined), there's no need to worry about their
9270 existence. Theoretically, they should never even be
9271 instantiated, but that's hard to forestall. */
9272 error ("invalid constructor; you probably meant %<%T (const %T&)%>",
9280 /* An operator with this code is unary, but can also be binary. */
9283 ambi_op_p (enum tree_code code)
9285 return (code == INDIRECT_REF
9286 || code == ADDR_EXPR
9287 || code == UNARY_PLUS_EXPR
9288 || code == NEGATE_EXPR
9289 || code == PREINCREMENT_EXPR
9290 || code == PREDECREMENT_EXPR);
9293 /* An operator with this name can only be unary. */
9296 unary_op_p (enum tree_code code)
9298 return (code == TRUTH_NOT_EXPR
9299 || code == BIT_NOT_EXPR
9300 || code == COMPONENT_REF
9301 || code == TYPE_EXPR);
9304 /* DECL is a declaration for an overloaded operator. If COMPLAIN is true,
9305 errors are issued for invalid declarations. */
9308 grok_op_properties (tree decl, bool complain)
9310 tree argtypes = TYPE_ARG_TYPES (TREE_TYPE (decl));
9312 int methodp = (TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE);
9313 tree name = DECL_NAME (decl);
9314 enum tree_code operator_code;
9319 /* Count the number of arguments and check for ellipsis. */
9320 for (argtype = argtypes, arity = 0;
9321 argtype && argtype != void_list_node;
9322 argtype = TREE_CHAIN (argtype))
9324 ellipsis_p = !argtype;
9326 class_type = DECL_CONTEXT (decl);
9327 if (class_type && !CLASS_TYPE_P (class_type))
9328 class_type = NULL_TREE;
9330 if (DECL_CONV_FN_P (decl))
9331 operator_code = TYPE_EXPR;
9335 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
9336 if (ansi_opname (CODE) == name) \
9338 operator_code = (CODE); \
9341 else if (ansi_assopname (CODE) == name) \
9343 operator_code = (CODE); \
9344 DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
9348 #include "operators.def"
9354 gcc_assert (operator_code != LAST_CPLUS_TREE_CODE);
9355 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
9358 switch (operator_code)
9361 TYPE_HAS_NEW_OPERATOR (class_type) = 1;
9365 TYPE_GETS_DELETE (class_type) |= 1;
9369 TYPE_HAS_ARRAY_NEW_OPERATOR (class_type) = 1;
9372 case VEC_DELETE_EXPR:
9373 TYPE_GETS_DELETE (class_type) |= 2;
9380 /* [basic.std.dynamic.allocation]/1:
9382 A program is ill-formed if an allocation function is declared
9383 in a namespace scope other than global scope or declared static
9386 The same also holds true for deallocation functions. */
9387 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR
9388 || operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
9390 if (DECL_NAMESPACE_SCOPE_P (decl))
9392 if (CP_DECL_CONTEXT (decl) != global_namespace)
9394 error ("%qD may not be declared within a namespace", decl);
9397 else if (!TREE_PUBLIC (decl))
9399 error ("%qD may not be declared as static", decl);
9405 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR)
9406 TREE_TYPE (decl) = coerce_new_type (TREE_TYPE (decl));
9407 else if (operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
9408 TREE_TYPE (decl) = coerce_delete_type (TREE_TYPE (decl));
9411 /* An operator function must either be a non-static member function
9412 or have at least one parameter of a class, a reference to a class,
9413 an enumeration, or a reference to an enumeration. 13.4.0.6 */
9414 if (! methodp || DECL_STATIC_FUNCTION_P (decl))
9416 if (operator_code == TYPE_EXPR
9417 || operator_code == CALL_EXPR
9418 || operator_code == COMPONENT_REF
9419 || operator_code == ARRAY_REF
9420 || operator_code == NOP_EXPR)
9422 error ("%qD must be a nonstatic member function", decl);
9429 if (DECL_STATIC_FUNCTION_P (decl))
9431 error ("%qD must be either a non-static member "
9432 "function or a non-member function", decl);
9436 for (p = argtypes; p && p != void_list_node; p = TREE_CHAIN (p))
9438 tree arg = non_reference (TREE_VALUE (p));
9439 if (arg == error_mark_node)
9442 /* IS_AGGR_TYPE, rather than CLASS_TYPE_P, is used
9443 because these checks are performed even on
9444 template functions. */
9445 if (IS_AGGR_TYPE (arg) || TREE_CODE (arg) == ENUMERAL_TYPE)
9449 if (!p || p == void_list_node)
9452 error ("%qD must have an argument of class or "
9453 "enumerated type", decl);
9459 /* There are no restrictions on the arguments to an overloaded
9461 if (operator_code == CALL_EXPR)
9464 /* Warn about conversion operators that will never be used. */
9465 if (IDENTIFIER_TYPENAME_P (name)
9466 && ! DECL_TEMPLATE_INFO (decl)
9468 /* Warn only declaring the function; there is no need to
9469 warn again about out-of-class definitions. */
9470 && class_type == current_class_type)
9472 tree t = TREE_TYPE (name);
9473 int ref = (TREE_CODE (t) == REFERENCE_TYPE);
9474 const char *what = 0;
9477 t = TYPE_MAIN_VARIANT (TREE_TYPE (t));
9479 if (TREE_CODE (t) == VOID_TYPE)
9481 else if (class_type)
9483 if (t == class_type)
9484 what = "the same type";
9485 /* Don't force t to be complete here. */
9486 else if (IS_AGGR_TYPE (t)
9487 && COMPLETE_TYPE_P (t)
9488 && DERIVED_FROM_P (t, class_type))
9489 what = "a base class";
9493 warning (OPT_Wconversion, "conversion to %s%s will never use a type "
9494 "conversion operator",
9495 ref ? "a reference to " : "", what);
9498 if (operator_code == COND_EXPR)
9501 error ("ISO C++ prohibits overloading operator ?:");
9504 else if (ellipsis_p)
9506 error ("%qD must not have variable number of arguments", decl);
9509 else if (ambi_op_p (operator_code))
9512 /* We pick the one-argument operator codes by default, so
9513 we don't have to change anything. */
9515 else if (arity == 2)
9517 /* If we thought this was a unary operator, we now know
9518 it to be a binary operator. */
9519 switch (operator_code)
9522 operator_code = MULT_EXPR;
9526 operator_code = BIT_AND_EXPR;
9529 case UNARY_PLUS_EXPR:
9530 operator_code = PLUS_EXPR;
9534 operator_code = MINUS_EXPR;
9537 case PREINCREMENT_EXPR:
9538 operator_code = POSTINCREMENT_EXPR;
9541 case PREDECREMENT_EXPR:
9542 operator_code = POSTDECREMENT_EXPR;
9549 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
9551 if ((operator_code == POSTINCREMENT_EXPR
9552 || operator_code == POSTDECREMENT_EXPR)
9553 && ! processing_template_decl
9554 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes)), integer_type_node))
9557 error ("postfix %qD must take %<int%> as its argument",
9560 error ("postfix %qD must take %<int%> as its second "
9568 error ("%qD must take either zero or one argument", decl);
9570 error ("%qD must take either one or two arguments", decl);
9574 /* More Effective C++ rule 6. */
9576 && (operator_code == POSTINCREMENT_EXPR
9577 || operator_code == POSTDECREMENT_EXPR
9578 || operator_code == PREINCREMENT_EXPR
9579 || operator_code == PREDECREMENT_EXPR))
9581 tree arg = TREE_VALUE (argtypes);
9582 tree ret = TREE_TYPE (TREE_TYPE (decl));
9583 if (methodp || TREE_CODE (arg) == REFERENCE_TYPE)
9584 arg = TREE_TYPE (arg);
9585 arg = TYPE_MAIN_VARIANT (arg);
9586 if (operator_code == PREINCREMENT_EXPR
9587 || operator_code == PREDECREMENT_EXPR)
9589 if (TREE_CODE (ret) != REFERENCE_TYPE
9590 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret)),
9592 warning (OPT_Weffc__, "prefix %qD should return %qT", decl,
9593 build_reference_type (arg));
9597 if (!same_type_p (TYPE_MAIN_VARIANT (ret), arg))
9598 warning (OPT_Weffc__, "postfix %qD should return %qT", decl, arg);
9602 else if (unary_op_p (operator_code))
9607 error ("%qD must take %<void%>", decl);
9609 error ("%qD must take exactly one argument", decl);
9613 else /* if (binary_op_p (operator_code)) */
9618 error ("%qD must take exactly one argument", decl);
9620 error ("%qD must take exactly two arguments", decl);
9624 /* More Effective C++ rule 7. */
9626 && (operator_code == TRUTH_ANDIF_EXPR
9627 || operator_code == TRUTH_ORIF_EXPR
9628 || operator_code == COMPOUND_EXPR))
9629 warning (OPT_Weffc__, "user-defined %qD always evaluates both arguments",
9633 /* Effective C++ rule 23. */
9636 && !DECL_ASSIGNMENT_OPERATOR_P (decl)
9637 && (operator_code == PLUS_EXPR
9638 || operator_code == MINUS_EXPR
9639 || operator_code == TRUNC_DIV_EXPR
9640 || operator_code == MULT_EXPR
9641 || operator_code == TRUNC_MOD_EXPR)
9642 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl))) == REFERENCE_TYPE)
9643 warning (OPT_Weffc__, "%qD should return by value", decl);
9646 for (; argtypes && argtypes != void_list_node;
9647 argtypes = TREE_CHAIN (argtypes))
9648 if (TREE_PURPOSE (argtypes))
9650 TREE_PURPOSE (argtypes) = NULL_TREE;
9651 if (operator_code == POSTINCREMENT_EXPR
9652 || operator_code == POSTDECREMENT_EXPR)
9655 pedwarn ("%qD cannot have default arguments", decl);
9659 error ("%qD cannot have default arguments", decl);
9667 /* Return a string giving the keyword associate with CODE. */
9670 tag_name (enum tag_types code)
9689 /* Name lookup in an elaborated-type-specifier (after the keyword
9690 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
9691 elaborated-type-specifier is invalid, issue a diagnostic and return
9692 error_mark_node; otherwise, return the *_TYPE to which it referred.
9693 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
9696 check_elaborated_type_specifier (enum tag_types tag_code,
9698 bool allow_template_p)
9704 struct S { struct S *p; };
9706 name lookup will find the TYPE_DECL for the implicit "S::S"
9707 typedef. Adjust for that here. */
9708 if (DECL_SELF_REFERENCE_P (decl))
9709 decl = TYPE_NAME (TREE_TYPE (decl));
9711 type = TREE_TYPE (decl);
9713 /* Check TEMPLATE_TYPE_PARM first because DECL_IMPLICIT_TYPEDEF_P
9714 is false for this case as well. */
9715 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
9717 error ("using template type parameter %qT after %qs",
9718 type, tag_name (tag_code));
9719 return error_mark_node;
9723 If the identifier resolves to a typedef-name or a template
9724 type-parameter, the elaborated-type-specifier is ill-formed.
9726 In other words, the only legitimate declaration to use in the
9727 elaborated type specifier is the implicit typedef created when
9728 the type is declared. */
9729 else if (!DECL_IMPLICIT_TYPEDEF_P (decl)
9730 && tag_code != typename_type)
9732 error ("using typedef-name %qD after %qs", decl, tag_name (tag_code));
9733 error ("%q+D has a previous declaration here", decl);
9734 return error_mark_node;
9736 else if (TREE_CODE (type) != RECORD_TYPE
9737 && TREE_CODE (type) != UNION_TYPE
9738 && tag_code != enum_type
9739 && tag_code != typename_type)
9741 error ("%qT referred to as %qs", type, tag_name (tag_code));
9742 error ("%q+T has a previous declaration here", type);
9743 return error_mark_node;
9745 else if (TREE_CODE (type) != ENUMERAL_TYPE
9746 && tag_code == enum_type)
9748 error ("%qT referred to as enum", type);
9749 error ("%q+T has a previous declaration here", type);
9750 return error_mark_node;
9752 else if (!allow_template_p
9753 && TREE_CODE (type) == RECORD_TYPE
9754 && CLASSTYPE_IS_TEMPLATE (type))
9756 /* If a class template appears as elaborated type specifier
9757 without a template header such as:
9759 template <class T> class C {};
9760 void f(class C); // No template header here
9762 then the required template argument is missing. */
9763 error ("template argument required for %<%s %T%>",
9764 tag_name (tag_code),
9765 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type)));
9766 return error_mark_node;
9772 /* Lookup NAME in elaborate type specifier in scope according to
9773 SCOPE and issue diagnostics if necessary.
9774 Return *_TYPE node upon success, NULL_TREE when the NAME is not
9775 found, and ERROR_MARK_NODE for type error. */
9778 lookup_and_check_tag (enum tag_types tag_code, tree name,
9779 tag_scope scope, bool template_header_p)
9783 if (scope == ts_global)
9785 /* First try ordinary name lookup, ignoring hidden class name
9786 injected via friend declaration. */
9787 decl = lookup_name_prefer_type (name, 2);
9788 /* If that fails, the name will be placed in the smallest
9789 non-class, non-function-prototype scope according to 3.3.1/5.
9790 We may already have a hidden name declared as friend in this
9791 scope. So lookup again but not ignoring hidden names.
9792 If we find one, that name will be made visible rather than
9793 creating a new tag. */
9795 decl = lookup_type_scope (name, ts_within_enclosing_non_class);
9798 decl = lookup_type_scope (name, scope);
9800 if (decl && DECL_CLASS_TEMPLATE_P (decl))
9801 decl = DECL_TEMPLATE_RESULT (decl);
9803 if (decl && TREE_CODE (decl) == TYPE_DECL)
9805 /* Look for invalid nested type:
9809 if (scope == ts_current && DECL_SELF_REFERENCE_P (decl))
9811 error ("%qD has the same name as the class in which it is "
9814 return error_mark_node;
9817 /* Two cases we need to consider when deciding if a class
9818 template is allowed as an elaborated type specifier:
9819 1. It is a self reference to its own class.
9820 2. It comes with a template header.
9824 template <class T> class C {
9825 class C *c1; // DECL_SELF_REFERENCE_P is true
9828 template <class U> class C; // template_header_p is true
9829 template <class T> class C<T>::D {
9830 class C *c2; // DECL_SELF_REFERENCE_P is true
9833 t = check_elaborated_type_specifier (tag_code,
9836 | DECL_SELF_REFERENCE_P (decl));
9843 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
9844 Define the tag as a forward-reference if it is not defined.
9846 If a declaration is given, process it here, and report an error if
9847 multiple declarations are not identical.
9849 SCOPE is TS_CURRENT when this is also a definition. Only look in
9850 the current frame for the name (since C++ allows new names in any
9851 scope.) It is TS_WITHIN_ENCLOSING_NON_CLASS if this is a friend
9852 declaration. Only look beginning from the current scope outward up
9853 till the nearest non-class scope. Otherwise it is TS_GLOBAL.
9855 TEMPLATE_HEADER_P is true when this declaration is preceded by
9856 a set of template parameters. */
9859 xref_tag (enum tag_types tag_code, tree name,
9860 tag_scope scope, bool template_header_p)
9862 enum tree_code code;
9864 tree context = NULL_TREE;
9866 timevar_push (TV_NAME_LOOKUP);
9868 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
9880 code = ENUMERAL_TYPE;
9886 /* In case of anonymous name, xref_tag is only called to
9887 make type node and push name. Name lookup is not required. */
9888 if (ANON_AGGRNAME_P (name))
9891 t = lookup_and_check_tag (tag_code, name,
9892 scope, template_header_p);
9894 if (t == error_mark_node)
9895 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
9897 if (scope != ts_current && t && current_class_type
9898 && template_class_depth (current_class_type)
9899 && template_header_p)
9901 /* Since SCOPE is not TS_CURRENT, we are not looking at a
9902 definition of this tag. Since, in addition, we are currently
9903 processing a (member) template declaration of a template
9904 class, we must be very careful; consider:
9911 { template <class V>
9912 friend struct S1; };
9914 Here, the S2::S1 declaration should not be confused with the
9915 outer declaration. In particular, the inner version should
9916 have a template parameter of level 2, not level 1. This
9917 would be particularly important if the member declaration
9920 template <class V = U> friend struct S1;
9922 say, when we should tsubst into `U' when instantiating
9923 S2. On the other hand, when presented with:
9933 we must find the inner binding eventually. We
9934 accomplish this by making sure that the new type we
9935 create to represent this declaration has the right
9937 context = TYPE_CONTEXT (t);
9943 /* If no such tag is yet defined, create a forward-reference node
9944 and record it as the "definition".
9945 When a real declaration of this type is found,
9946 the forward-reference will be altered into a real type. */
9947 if (code == ENUMERAL_TYPE)
9949 error ("use of enum %q#D without previous declaration", name);
9950 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
9954 t = make_aggr_type (code);
9955 TYPE_CONTEXT (t) = context;
9956 t = pushtag (name, t, scope);
9961 if (template_header_p && IS_AGGR_TYPE (t))
9963 if (!redeclare_class_template (t, current_template_parms))
9964 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
9966 else if (!processing_template_decl
9968 && CLASSTYPE_IS_TEMPLATE (t))
9970 error ("redeclaration of %qT as a non-template", t);
9971 error ("previous declaration %q+D", t);
9972 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
9975 /* Make injected friend class visible. */
9976 if (scope != ts_within_enclosing_non_class
9977 && hidden_name_p (TYPE_NAME (t)))
9979 DECL_ANTICIPATED (TYPE_NAME (t)) = 0;
9980 DECL_FRIEND_P (TYPE_NAME (t)) = 0;
9982 if (TYPE_TEMPLATE_INFO (t))
9984 DECL_ANTICIPATED (TYPE_TI_TEMPLATE (t)) = 0;
9985 DECL_FRIEND_P (TYPE_TI_TEMPLATE (t)) = 0;
9990 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, t);
9994 xref_tag_from_type (tree old, tree id, tag_scope scope)
9996 enum tag_types tag_kind;
9998 if (TREE_CODE (old) == RECORD_TYPE)
9999 tag_kind = (CLASSTYPE_DECLARED_CLASS (old) ? class_type : record_type);
10001 tag_kind = union_type;
10003 if (id == NULL_TREE)
10004 id = TYPE_IDENTIFIER (old);
10006 return xref_tag (tag_kind, id, scope, false);
10009 /* Create the binfo hierarchy for REF with (possibly NULL) base list
10010 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
10011 access_* node, and the TREE_VALUE is the type of the base-class.
10012 Non-NULL TREE_TYPE indicates virtual inheritance.
10014 Returns true if the binfo hierarchy was successfully created,
10015 false if an error was detected. */
10018 xref_basetypes (tree ref, tree base_list)
10021 tree binfo, base_binfo;
10022 unsigned max_vbases = 0; /* Maximum direct & indirect virtual bases. */
10023 unsigned max_bases = 0; /* Maximum direct bases. */
10025 tree default_access;
10026 tree igo_prev; /* Track Inheritance Graph Order. */
10028 if (ref == error_mark_node)
10031 /* The base of a derived class is private by default, all others are
10033 default_access = (TREE_CODE (ref) == RECORD_TYPE
10034 && CLASSTYPE_DECLARED_CLASS (ref)
10035 ? access_private_node : access_public_node);
10037 /* First, make sure that any templates in base-classes are
10038 instantiated. This ensures that if we call ourselves recursively
10039 we do not get confused about which classes are marked and which
10041 basep = &base_list;
10044 tree basetype = TREE_VALUE (*basep);
10046 if (!(processing_template_decl && uses_template_parms (basetype))
10047 && !complete_type_or_else (basetype, NULL))
10048 /* An incomplete type. Remove it from the list. */
10049 *basep = TREE_CHAIN (*basep);
10053 if (TREE_TYPE (*basep))
10055 if (CLASS_TYPE_P (basetype))
10056 max_vbases += VEC_length (tree, CLASSTYPE_VBASECLASSES (basetype));
10057 basep = &TREE_CHAIN (*basep);
10061 TYPE_MARKED_P (ref) = 1;
10063 /* The binfo slot should be empty, unless this is an (ill-formed)
10065 gcc_assert (!TYPE_BINFO (ref) || TYPE_SIZE (ref));
10066 gcc_assert (TYPE_MAIN_VARIANT (ref) == ref);
10068 binfo = make_tree_binfo (max_bases);
10070 TYPE_BINFO (ref) = binfo;
10071 BINFO_OFFSET (binfo) = size_zero_node;
10072 BINFO_TYPE (binfo) = ref;
10076 BINFO_BASE_ACCESSES (binfo) = VEC_alloc (tree, gc, max_bases);
10077 /* An aggregate cannot have baseclasses. */
10078 CLASSTYPE_NON_AGGREGATE (ref) = 1;
10080 if (TREE_CODE (ref) == UNION_TYPE)
10082 error ("derived union %qT invalid", ref);
10089 if (TYPE_FOR_JAVA (ref))
10091 error ("Java class %qT cannot have multiple bases", ref);
10098 CLASSTYPE_VBASECLASSES (ref) = VEC_alloc (tree, gc, max_vbases);
10100 if (TYPE_FOR_JAVA (ref))
10102 error ("Java class %qT cannot have virtual bases", ref);
10107 for (igo_prev = binfo; base_list; base_list = TREE_CHAIN (base_list))
10109 tree access = TREE_PURPOSE (base_list);
10110 int via_virtual = TREE_TYPE (base_list) != NULL_TREE;
10111 tree basetype = TREE_VALUE (base_list);
10113 if (access == access_default_node)
10114 access = default_access;
10116 if (PACK_EXPANSION_P (basetype))
10117 basetype = PACK_EXPANSION_PATTERN (basetype);
10118 if (TREE_CODE (basetype) == TYPE_DECL)
10119 basetype = TREE_TYPE (basetype);
10120 if (TREE_CODE (basetype) != RECORD_TYPE
10121 && TREE_CODE (basetype) != TYPENAME_TYPE
10122 && TREE_CODE (basetype) != TEMPLATE_TYPE_PARM
10123 && TREE_CODE (basetype) != BOUND_TEMPLATE_TEMPLATE_PARM)
10125 error ("base type %qT fails to be a struct or class type",
10130 if (TYPE_FOR_JAVA (basetype) && (current_lang_depth () == 0))
10131 TYPE_FOR_JAVA (ref) = 1;
10133 base_binfo = NULL_TREE;
10134 if (CLASS_TYPE_P (basetype) && !dependent_type_p (basetype))
10136 base_binfo = TYPE_BINFO (basetype);
10137 /* The original basetype could have been a typedef'd type. */
10138 basetype = BINFO_TYPE (base_binfo);
10140 /* Inherit flags from the base. */
10141 TYPE_HAS_NEW_OPERATOR (ref)
10142 |= TYPE_HAS_NEW_OPERATOR (basetype);
10143 TYPE_HAS_ARRAY_NEW_OPERATOR (ref)
10144 |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype);
10145 TYPE_GETS_DELETE (ref) |= TYPE_GETS_DELETE (basetype);
10146 TYPE_HAS_CONVERSION (ref) |= TYPE_HAS_CONVERSION (basetype);
10147 CLASSTYPE_DIAMOND_SHAPED_P (ref)
10148 |= CLASSTYPE_DIAMOND_SHAPED_P (basetype);
10149 CLASSTYPE_REPEATED_BASE_P (ref)
10150 |= CLASSTYPE_REPEATED_BASE_P (basetype);
10153 /* We must do this test after we've seen through a typedef
10155 if (TYPE_MARKED_P (basetype))
10157 if (basetype == ref)
10158 error ("recursive type %qT undefined", basetype);
10160 error ("duplicate base type %qT invalid", basetype);
10164 if (PACK_EXPANSION_P (TREE_VALUE (base_list)))
10165 /* Regenerate the pack expansion for the bases. */
10166 basetype = make_pack_expansion (basetype);
10168 TYPE_MARKED_P (basetype) = 1;
10170 base_binfo = copy_binfo (base_binfo, basetype, ref,
10171 &igo_prev, via_virtual);
10172 if (!BINFO_INHERITANCE_CHAIN (base_binfo))
10173 BINFO_INHERITANCE_CHAIN (base_binfo) = binfo;
10175 BINFO_BASE_APPEND (binfo, base_binfo);
10176 BINFO_BASE_ACCESS_APPEND (binfo, access);
10179 if (VEC_space (tree, CLASSTYPE_VBASECLASSES (ref), 1))
10180 /* If we have space in the vbase vector, we must have shared at
10181 least one of them, and are therefore diamond shaped. */
10182 CLASSTYPE_DIAMOND_SHAPED_P (ref) = 1;
10184 /* Unmark all the types. */
10185 for (i = 0; BINFO_BASE_ITERATE (binfo, i, base_binfo); i++)
10186 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
10187 TYPE_MARKED_P (ref) = 0;
10189 /* Now see if we have a repeated base type. */
10190 if (!CLASSTYPE_REPEATED_BASE_P (ref))
10192 for (base_binfo = binfo; base_binfo;
10193 base_binfo = TREE_CHAIN (base_binfo))
10195 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
10197 CLASSTYPE_REPEATED_BASE_P (ref) = 1;
10200 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 1;
10202 for (base_binfo = binfo; base_binfo;
10203 base_binfo = TREE_CHAIN (base_binfo))
10204 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
10205 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
10214 /* Begin compiling the definition of an enumeration type.
10216 Returns the type object, as yet incomplete.
10217 Also records info about it so that build_enumerator
10218 may be used to declare the individual values as they are read. */
10221 start_enum (tree name)
10225 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
10227 /* If this is the real definition for a previous forward reference,
10228 fill in the contents in the same object that used to be the
10229 forward reference. */
10231 enumtype = lookup_and_check_tag (enum_type, name,
10232 /*tag_scope=*/ts_current,
10233 /*template_header_p=*/false);
10235 if (enumtype != NULL_TREE && TREE_CODE (enumtype) == ENUMERAL_TYPE)
10237 error ("multiple definition of %q#T", enumtype);
10238 error ("%Jprevious definition here", TYPE_MAIN_DECL (enumtype));
10239 /* Clear out TYPE_VALUES, and start again. */
10240 TYPE_VALUES (enumtype) = NULL_TREE;
10244 /* In case of error, make a dummy enum to allow parsing to
10246 if (enumtype == error_mark_node)
10247 name = make_anon_name ();
10249 enumtype = make_node (ENUMERAL_TYPE);
10250 enumtype = pushtag (name, enumtype, /*tag_scope=*/ts_current);
10256 /* After processing and defining all the values of an enumeration type,
10257 install their decls in the enumeration type and finish it off.
10258 ENUMTYPE is the type object and VALUES a list of name-value pairs. */
10261 finish_enum (tree enumtype)
10270 bool use_short_enum;
10274 integer_type_kind itk;
10275 tree underlying_type = NULL_TREE;
10277 /* We built up the VALUES in reverse order. */
10278 TYPE_VALUES (enumtype) = nreverse (TYPE_VALUES (enumtype));
10280 /* For an enum defined in a template, just set the type of the values;
10281 all further processing is postponed until the template is
10282 instantiated. We need to set the type so that tsubst of a CONST_DECL
10284 if (processing_template_decl)
10286 for (values = TYPE_VALUES (enumtype);
10288 values = TREE_CHAIN (values))
10289 TREE_TYPE (TREE_VALUE (values)) = enumtype;
10290 if (at_function_scope_p ())
10291 add_stmt (build_min (TAG_DEFN, enumtype));
10295 /* Determine the minimum and maximum values of the enumerators. */
10296 if (TYPE_VALUES (enumtype))
10298 minnode = maxnode = NULL_TREE;
10300 for (values = TYPE_VALUES (enumtype);
10302 values = TREE_CHAIN (values))
10304 decl = TREE_VALUE (values);
10306 /* [dcl.enum]: Following the closing brace of an enum-specifier,
10307 each enumerator has the type of its enumeration. Prior to the
10308 closing brace, the type of each enumerator is the type of its
10309 initializing value. */
10310 TREE_TYPE (decl) = enumtype;
10312 /* Update the minimum and maximum values, if appropriate. */
10313 value = DECL_INITIAL (decl);
10314 if (value == error_mark_node)
10315 value = integer_zero_node;
10316 /* Figure out what the minimum and maximum values of the
10317 enumerators are. */
10319 minnode = maxnode = value;
10320 else if (tree_int_cst_lt (maxnode, value))
10322 else if (tree_int_cst_lt (value, minnode))
10329 If the enumerator-list is empty, the underlying type is as if
10330 the enumeration had a single enumerator with value 0. */
10331 minnode = maxnode = integer_zero_node;
10333 /* Compute the number of bits require to represent all values of the
10334 enumeration. We must do this before the type of MINNODE and
10335 MAXNODE are transformed, since min_precision relies on the
10336 TREE_TYPE of the value it is passed. */
10337 unsignedp = tree_int_cst_sgn (minnode) >= 0;
10338 lowprec = min_precision (minnode, unsignedp);
10339 highprec = min_precision (maxnode, unsignedp);
10340 precision = MAX (lowprec, highprec);
10342 /* Determine the underlying type of the enumeration.
10346 The underlying type of an enumeration is an integral type that
10347 can represent all the enumerator values defined in the
10348 enumeration. It is implementation-defined which integral type is
10349 used as the underlying type for an enumeration except that the
10350 underlying type shall not be larger than int unless the value of
10351 an enumerator cannot fit in an int or unsigned int.
10353 We use "int" or an "unsigned int" as the underlying type, even if
10354 a smaller integral type would work, unless the user has
10355 explicitly requested that we use the smallest possible type. The
10356 user can request that for all enumerations with a command line
10357 flag, or for just one enumeration with an attribute. */
10359 use_short_enum = flag_short_enums
10360 || lookup_attribute ("packed", TYPE_ATTRIBUTES (enumtype));
10362 for (itk = (use_short_enum ? itk_char : itk_int);
10366 underlying_type = integer_types[itk];
10367 if (TYPE_PRECISION (underlying_type) >= precision
10368 && TYPE_UNSIGNED (underlying_type) == unsignedp)
10371 if (itk == itk_none)
10375 IF no integral type can represent all the enumerator values, the
10376 enumeration is ill-formed. */
10377 error ("no integral type can represent all of the enumerator values "
10378 "for %qT", enumtype);
10379 precision = TYPE_PRECISION (long_long_integer_type_node);
10380 underlying_type = integer_types[itk_unsigned_long_long];
10383 /* Compute the minium and maximum values for the type.
10387 For an enumeration where emin is the smallest enumerator and emax
10388 is the largest, the values of the enumeration are the values of the
10389 underlying type in the range bmin to bmax, where bmin and bmax are,
10390 respectively, the smallest and largest values of the smallest bit-
10391 field that can store emin and emax. */
10393 /* The middle-end currently assumes that types with TYPE_PRECISION
10394 narrower than their underlying type are suitably zero or sign
10395 extended to fill their mode. g++ doesn't make these guarantees.
10396 Until the middle-end can represent such paradoxical types, we
10397 set the TYPE_PRECISION to the width of the underlying type. */
10398 TYPE_PRECISION (enumtype) = TYPE_PRECISION (underlying_type);
10400 set_min_and_max_values_for_integral_type (enumtype, precision, unsignedp);
10404 The value of sizeof() applied to an enumeration type, an object
10405 of an enumeration type, or an enumerator, is the value of sizeof()
10406 applied to the underlying type. */
10407 TYPE_SIZE (enumtype) = TYPE_SIZE (underlying_type);
10408 TYPE_SIZE_UNIT (enumtype) = TYPE_SIZE_UNIT (underlying_type);
10409 TYPE_MODE (enumtype) = TYPE_MODE (underlying_type);
10410 TYPE_ALIGN (enumtype) = TYPE_ALIGN (underlying_type);
10411 TYPE_USER_ALIGN (enumtype) = TYPE_USER_ALIGN (underlying_type);
10412 TYPE_UNSIGNED (enumtype) = TYPE_UNSIGNED (underlying_type);
10414 /* Convert each of the enumerators to the type of the underlying
10415 type of the enumeration. */
10416 for (values = TYPE_VALUES (enumtype); values; values = TREE_CHAIN (values))
10418 location_t saved_location;
10420 decl = TREE_VALUE (values);
10421 saved_location = input_location;
10422 input_location = DECL_SOURCE_LOCATION (decl);
10423 value = perform_implicit_conversion (underlying_type,
10424 DECL_INITIAL (decl));
10425 input_location = saved_location;
10427 /* Do not clobber shared ints. */
10428 value = copy_node (value);
10430 TREE_TYPE (value) = enumtype;
10431 DECL_INITIAL (decl) = value;
10432 TREE_VALUE (values) = value;
10435 /* Fix up all variant types of this enum type. */
10436 for (t = TYPE_MAIN_VARIANT (enumtype); t; t = TYPE_NEXT_VARIANT (t))
10438 TYPE_VALUES (t) = TYPE_VALUES (enumtype);
10439 TYPE_MIN_VALUE (t) = TYPE_MIN_VALUE (enumtype);
10440 TYPE_MAX_VALUE (t) = TYPE_MAX_VALUE (enumtype);
10441 TYPE_SIZE (t) = TYPE_SIZE (enumtype);
10442 TYPE_SIZE_UNIT (t) = TYPE_SIZE_UNIT (enumtype);
10443 TYPE_MODE (t) = TYPE_MODE (enumtype);
10444 TYPE_PRECISION (t) = TYPE_PRECISION (enumtype);
10445 TYPE_ALIGN (t) = TYPE_ALIGN (enumtype);
10446 TYPE_USER_ALIGN (t) = TYPE_USER_ALIGN (enumtype);
10447 TYPE_UNSIGNED (t) = TYPE_UNSIGNED (enumtype);
10450 /* Finish debugging output for this type. */
10451 rest_of_type_compilation (enumtype, namespace_bindings_p ());
10454 /* Build and install a CONST_DECL for an enumeration constant of the
10455 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
10456 Assignment of sequential values by default is handled here. */
10459 build_enumerator (tree name, tree value, tree enumtype)
10465 /* If the VALUE was erroneous, pretend it wasn't there; that will
10466 result in the enum being assigned the next value in sequence. */
10467 if (value == error_mark_node)
10470 /* Remove no-op casts from the value. */
10472 STRIP_TYPE_NOPS (value);
10474 if (! processing_template_decl)
10476 /* Validate and default VALUE. */
10477 if (value != NULL_TREE)
10479 value = integral_constant_value (value);
10481 if (TREE_CODE (value) == INTEGER_CST)
10483 value = perform_integral_promotions (value);
10484 constant_expression_warning (value);
10488 error ("enumerator value for %qD is not an integer constant", name);
10493 /* Default based on previous value. */
10494 if (value == NULL_TREE)
10496 if (TYPE_VALUES (enumtype))
10499 unsigned HOST_WIDE_INT lo;
10503 /* The next value is the previous value plus one. We can
10504 safely assume that the previous value is an INTEGER_CST.
10505 add_double doesn't know the type of the target expression,
10506 so we must check with int_fits_type_p as well. */
10507 prev_value = DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype)));
10508 overflowed = add_double (TREE_INT_CST_LOW (prev_value),
10509 TREE_INT_CST_HIGH (prev_value),
10511 value = build_int_cst_wide (TREE_TYPE (prev_value), lo, hi);
10512 overflowed |= !int_fits_type_p (value, TREE_TYPE (prev_value));
10516 error ("overflow in enumeration values at %qD", name);
10517 value = error_mark_node;
10521 value = integer_zero_node;
10524 /* Remove no-op casts from the value. */
10525 STRIP_TYPE_NOPS (value);
10528 /* C++ associates enums with global, function, or class declarations. */
10529 context = current_scope ();
10531 /* Build the actual enumeration constant. Note that the enumeration
10532 constants have the type of their initializers until the
10533 enumeration is complete:
10537 Following the closing brace of an enum-specifier, each enumer-
10538 ator has the type of its enumeration. Prior to the closing
10539 brace, the type of each enumerator is the type of its
10540 initializing value.
10542 In finish_enum we will reset the type. Of course, if we're
10543 processing a template, there may be no value. */
10544 type = value ? TREE_TYPE (value) : NULL_TREE;
10546 if (context && context == current_class_type)
10547 /* This enum declaration is local to the class. We need the full
10548 lang_decl so that we can record DECL_CLASS_CONTEXT, for example. */
10549 decl = build_lang_decl (CONST_DECL, name, type);
10551 /* It's a global enum, or it's local to a function. (Note local to
10552 a function could mean local to a class method. */
10553 decl = build_decl (CONST_DECL, name, type);
10555 DECL_CONTEXT (decl) = FROB_CONTEXT (context);
10556 TREE_CONSTANT (decl) = 1;
10557 TREE_INVARIANT (decl) = 1;
10558 TREE_READONLY (decl) = 1;
10559 DECL_INITIAL (decl) = value;
10561 if (context && context == current_class_type)
10562 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
10563 on the TYPE_FIELDS list for `S'. (That's so that you can say
10564 things like `S::i' later.) */
10565 finish_member_declaration (decl);
10569 /* Add this enumeration constant to the list for this type. */
10570 TYPE_VALUES (enumtype) = tree_cons (name, decl, TYPE_VALUES (enumtype));
10574 /* We're defining DECL. Make sure that it's type is OK. */
10577 check_function_type (tree decl, tree current_function_parms)
10579 tree fntype = TREE_TYPE (decl);
10580 tree return_type = complete_type (TREE_TYPE (fntype));
10582 /* In a function definition, arg types must be complete. */
10583 require_complete_types_for_parms (current_function_parms);
10585 if (dependent_type_p (return_type))
10587 if (!COMPLETE_OR_VOID_TYPE_P (return_type))
10589 tree args = TYPE_ARG_TYPES (fntype);
10591 error ("return type %q#T is incomplete", return_type);
10593 /* Make it return void instead. */
10594 if (TREE_CODE (fntype) == METHOD_TYPE)
10595 fntype = build_method_type_directly (TREE_TYPE (TREE_VALUE (args)),
10597 TREE_CHAIN (args));
10599 fntype = build_function_type (void_type_node, args);
10601 = build_exception_variant (fntype,
10602 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (decl)));
10605 abstract_virtuals_error (decl, TREE_TYPE (fntype));
10608 /* Create the FUNCTION_DECL for a function definition.
10609 DECLSPECS and DECLARATOR are the parts of the declaration;
10610 they describe the function's name and the type it returns,
10611 but twisted together in a fashion that parallels the syntax of C.
10613 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
10614 DECLARATOR is really the DECL for the function we are about to
10615 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
10616 indicating that the function is an inline defined in-class.
10618 This function creates a binding context for the function body
10619 as well as setting up the FUNCTION_DECL in current_function_decl.
10621 For C++, we must first check whether that datum makes any sense.
10622 For example, "class A local_a(1,2);" means that variable local_a
10623 is an aggregate of type A, which should have a constructor
10624 applied to it with the argument list [1, 2].
10626 On entry, DECL_INITIAL (decl1) should be NULL_TREE or error_mark_node,
10627 or may be a BLOCK if the function has been defined previously
10628 in this translation unit. On exit, DECL_INITIAL (decl1) will be
10629 error_mark_node if the function has never been defined, or
10630 a BLOCK if the function has been defined somewhere. */
10633 start_preparsed_function (tree decl1, tree attrs, int flags)
10635 tree ctype = NULL_TREE;
10638 int doing_friend = 0;
10639 struct cp_binding_level *bl;
10640 tree current_function_parms;
10641 struct c_fileinfo *finfo
10642 = get_fileinfo (LOCATION_FILE (DECL_SOURCE_LOCATION (decl1)));
10643 bool honor_interface;
10645 /* Sanity check. */
10646 gcc_assert (TREE_CODE (TREE_VALUE (void_list_node)) == VOID_TYPE);
10647 gcc_assert (TREE_CHAIN (void_list_node) == NULL_TREE);
10649 fntype = TREE_TYPE (decl1);
10650 if (TREE_CODE (fntype) == METHOD_TYPE)
10651 ctype = TYPE_METHOD_BASETYPE (fntype);
10653 /* ISO C++ 11.4/5. A friend function defined in a class is in
10654 the (lexical) scope of the class in which it is defined. */
10655 if (!ctype && DECL_FRIEND_P (decl1))
10657 ctype = DECL_FRIEND_CONTEXT (decl1);
10659 /* CTYPE could be null here if we're dealing with a template;
10660 for example, `inline friend float foo()' inside a template
10661 will have no CTYPE set. */
10662 if (ctype && TREE_CODE (ctype) != RECORD_TYPE)
10668 if (DECL_DECLARED_INLINE_P (decl1)
10669 && lookup_attribute ("noinline", attrs))
10670 warning (0, "inline function %q+D given attribute noinline", decl1);
10672 if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1))
10673 /* This is a constructor, we must ensure that any default args
10674 introduced by this definition are propagated to the clones
10675 now. The clones are used directly in overload resolution. */
10676 adjust_clone_args (decl1);
10678 /* Sometimes we don't notice that a function is a static member, and
10679 build a METHOD_TYPE for it. Fix that up now. */
10680 if (ctype != NULL_TREE && DECL_STATIC_FUNCTION_P (decl1)
10681 && TREE_CODE (TREE_TYPE (decl1)) == METHOD_TYPE)
10683 revert_static_member_fn (decl1);
10687 /* Set up current_class_type, and enter the scope of the class, if
10690 push_nested_class (ctype);
10691 else if (DECL_STATIC_FUNCTION_P (decl1))
10692 push_nested_class (DECL_CONTEXT (decl1));
10694 /* Now that we have entered the scope of the class, we must restore
10695 the bindings for any template parameters surrounding DECL1, if it
10696 is an inline member template. (Order is important; consider the
10697 case where a template parameter has the same name as a field of
10698 the class.) It is not until after this point that
10699 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
10700 if (flags & SF_INCLASS_INLINE)
10701 maybe_begin_member_template_processing (decl1);
10703 /* Effective C++ rule 15. */
10705 && DECL_OVERLOADED_OPERATOR_P (decl1) == NOP_EXPR
10706 && TREE_CODE (TREE_TYPE (fntype)) == VOID_TYPE)
10707 warning (OPT_Weffc__, "%<operator=%> should return a reference to %<*this%>");
10709 /* Make the init_value nonzero so pushdecl knows this is not tentative.
10710 error_mark_node is replaced below (in poplevel) with the BLOCK. */
10711 if (!DECL_INITIAL (decl1))
10712 DECL_INITIAL (decl1) = error_mark_node;
10714 /* This function exists in static storage.
10715 (This does not mean `static' in the C sense!) */
10716 TREE_STATIC (decl1) = 1;
10718 /* We must call push_template_decl after current_class_type is set
10719 up. (If we are processing inline definitions after exiting a
10720 class scope, current_class_type will be NULL_TREE until set above
10721 by push_nested_class.) */
10722 if (processing_template_decl)
10724 /* FIXME: Handle error_mark_node more gracefully. */
10725 tree newdecl1 = push_template_decl (decl1);
10726 if (newdecl1 != error_mark_node)
10730 /* We are now in the scope of the function being defined. */
10731 current_function_decl = decl1;
10733 /* Save the parm names or decls from this function's declarator
10734 where store_parm_decls will find them. */
10735 current_function_parms = DECL_ARGUMENTS (decl1);
10737 /* Make sure the parameter and return types are reasonable. When
10738 you declare a function, these types can be incomplete, but they
10739 must be complete when you define the function. */
10740 check_function_type (decl1, current_function_parms);
10742 /* Build the return declaration for the function. */
10743 restype = TREE_TYPE (fntype);
10744 /* Promote the value to int before returning it. */
10745 if (c_promoting_integer_type_p (restype))
10746 restype = type_promotes_to (restype);
10747 if (DECL_RESULT (decl1) == NULL_TREE)
10751 resdecl = build_decl (RESULT_DECL, 0, TYPE_MAIN_VARIANT (restype));
10752 DECL_ARTIFICIAL (resdecl) = 1;
10753 DECL_IGNORED_P (resdecl) = 1;
10754 DECL_RESULT (decl1) = resdecl;
10756 cp_apply_type_quals_to_decl (cp_type_quals (restype), resdecl);
10759 /* Let the user know we're compiling this function. */
10760 announce_function (decl1);
10762 /* Record the decl so that the function name is defined.
10763 If we already have a decl for this name, and it is a FUNCTION_DECL,
10764 use the old decl. */
10765 if (!processing_template_decl && !(flags & SF_PRE_PARSED))
10767 /* A specialization is not used to guide overload resolution. */
10768 if (!DECL_FUNCTION_MEMBER_P (decl1)
10769 && !(DECL_USE_TEMPLATE (decl1) &&
10770 PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl1))))
10772 tree olddecl = pushdecl (decl1);
10774 if (olddecl == error_mark_node)
10775 /* If something went wrong when registering the declaration,
10776 use DECL1; we have to have a FUNCTION_DECL to use when
10777 parsing the body of the function. */
10781 /* Otherwise, OLDDECL is either a previous declaration
10782 of the same function or DECL1 itself. */
10784 if (warn_missing_declarations
10785 && olddecl == decl1
10786 && !DECL_MAIN_P (decl1)
10787 && TREE_PUBLIC (decl1)
10788 && !DECL_DECLARED_INLINE_P (decl1))
10792 /* Check whether DECL1 is in an anonymous
10794 for (context = DECL_CONTEXT (decl1);
10796 context = DECL_CONTEXT (context))
10798 if (TREE_CODE (context) == NAMESPACE_DECL
10799 && DECL_NAME (context) == NULL_TREE)
10803 if (context == NULL)
10804 warning (OPT_Wmissing_declarations,
10805 "no previous declaration for %q+D", decl1);
10813 /* We need to set the DECL_CONTEXT. */
10814 if (!DECL_CONTEXT (decl1) && DECL_TEMPLATE_INFO (decl1))
10815 DECL_CONTEXT (decl1) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1));
10817 fntype = TREE_TYPE (decl1);
10819 /* If #pragma weak applies, mark the decl appropriately now.
10820 The pragma only applies to global functions. Because
10821 determining whether or not the #pragma applies involves
10822 computing the mangled name for the declaration, we cannot
10823 apply the pragma until after we have merged this declaration
10824 with any previous declarations; if the original declaration
10825 has a linkage specification, that specification applies to
10826 the definition as well, and may affect the mangled name. */
10827 if (!DECL_CONTEXT (decl1))
10828 maybe_apply_pragma_weak (decl1);
10831 /* Reset this in case the call to pushdecl changed it. */
10832 current_function_decl = decl1;
10834 gcc_assert (DECL_INITIAL (decl1));
10836 /* This function may already have been parsed, in which case just
10837 return; our caller will skip over the body without parsing. */
10838 if (DECL_INITIAL (decl1) != error_mark_node)
10841 /* Initialize RTL machinery. We cannot do this until
10842 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
10843 even when processing a template; this is how we get
10844 CFUN set up, and our per-function variables initialized.
10845 FIXME factor out the non-RTL stuff. */
10846 bl = current_binding_level;
10847 allocate_struct_function (decl1);
10848 current_binding_level = bl;
10850 /* Even though we're inside a function body, we still don't want to
10851 call expand_expr to calculate the size of a variable-sized array.
10852 We haven't necessarily assigned RTL to all variables yet, so it's
10853 not safe to try to expand expressions involving them. */
10854 cfun->x_dont_save_pending_sizes_p = 1;
10856 /* Start the statement-tree, start the tree now. */
10857 DECL_SAVED_TREE (decl1) = push_stmt_list ();
10859 /* If we are (erroneously) defining a function that we have already
10860 defined before, wipe out what we knew before. */
10861 if (!DECL_PENDING_INLINE_P (decl1))
10862 DECL_SAVED_FUNCTION_DATA (decl1) = NULL;
10864 if (ctype && !doing_friend && !DECL_STATIC_FUNCTION_P (decl1))
10866 /* We know that this was set up by `grokclassfn'. We do not
10867 wait until `store_parm_decls', since evil parse errors may
10868 never get us to that point. Here we keep the consistency
10869 between `current_class_type' and `current_class_ptr'. */
10870 tree t = DECL_ARGUMENTS (decl1);
10872 gcc_assert (t != NULL_TREE && TREE_CODE (t) == PARM_DECL);
10873 gcc_assert (TREE_CODE (TREE_TYPE (t)) == POINTER_TYPE);
10875 cp_function_chain->x_current_class_ref
10876 = build_indirect_ref (t, NULL);
10877 cp_function_chain->x_current_class_ptr = t;
10879 /* Constructors and destructors need to know whether they're "in
10880 charge" of initializing virtual base classes. */
10881 t = TREE_CHAIN (t);
10882 if (DECL_HAS_IN_CHARGE_PARM_P (decl1))
10884 current_in_charge_parm = t;
10885 t = TREE_CHAIN (t);
10887 if (DECL_HAS_VTT_PARM_P (decl1))
10889 gcc_assert (DECL_NAME (t) == vtt_parm_identifier);
10890 current_vtt_parm = t;
10894 honor_interface = (!DECL_TEMPLATE_INSTANTIATION (decl1)
10895 /* Implicitly-defined methods (like the
10896 destructor for a class in which no destructor
10897 is explicitly declared) must not be defined
10898 until their definition is needed. So, we
10899 ignore interface specifications for
10900 compiler-generated functions. */
10901 && !DECL_ARTIFICIAL (decl1));
10903 if (DECL_INTERFACE_KNOWN (decl1))
10905 tree ctx = decl_function_context (decl1);
10907 if (DECL_NOT_REALLY_EXTERN (decl1))
10908 DECL_EXTERNAL (decl1) = 0;
10910 if (ctx != NULL_TREE && DECL_DECLARED_INLINE_P (ctx)
10911 && TREE_PUBLIC (ctx))
10912 /* This is a function in a local class in an extern inline
10914 comdat_linkage (decl1);
10916 /* If this function belongs to an interface, it is public.
10917 If it belongs to someone else's interface, it is also external.
10918 This only affects inlines and template instantiations. */
10919 else if (!finfo->interface_unknown && honor_interface)
10921 if (DECL_DECLARED_INLINE_P (decl1)
10922 || DECL_TEMPLATE_INSTANTIATION (decl1)
10923 || processing_template_decl)
10925 DECL_EXTERNAL (decl1)
10926 = (finfo->interface_only
10927 || (DECL_DECLARED_INLINE_P (decl1)
10928 && ! flag_implement_inlines
10929 && !DECL_VINDEX (decl1)));
10931 /* For WIN32 we also want to put these in linkonce sections. */
10932 maybe_make_one_only (decl1);
10935 DECL_EXTERNAL (decl1) = 0;
10936 DECL_INTERFACE_KNOWN (decl1) = 1;
10937 /* If this function is in an interface implemented in this file,
10938 make sure that the back end knows to emit this function
10940 if (!DECL_EXTERNAL (decl1))
10941 mark_needed (decl1);
10943 else if (finfo->interface_unknown && finfo->interface_only
10944 && honor_interface)
10946 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
10947 interface, we will have both finfo->interface_unknown and
10948 finfo->interface_only set. In that case, we don't want to
10949 use the normal heuristics because someone will supply a
10950 #pragma implementation elsewhere, and deducing it here would
10951 produce a conflict. */
10952 comdat_linkage (decl1);
10953 DECL_EXTERNAL (decl1) = 0;
10954 DECL_INTERFACE_KNOWN (decl1) = 1;
10955 DECL_DEFER_OUTPUT (decl1) = 1;
10959 /* This is a definition, not a reference.
10960 So clear DECL_EXTERNAL. */
10961 DECL_EXTERNAL (decl1) = 0;
10963 if ((DECL_DECLARED_INLINE_P (decl1)
10964 || DECL_TEMPLATE_INSTANTIATION (decl1))
10965 && ! DECL_INTERFACE_KNOWN (decl1)
10966 /* Don't try to defer nested functions for now. */
10967 && ! decl_function_context (decl1))
10968 DECL_DEFER_OUTPUT (decl1) = 1;
10970 DECL_INTERFACE_KNOWN (decl1) = 1;
10973 /* Determine the ELF visibility attribute for the function. We must not
10974 do this before calling "pushdecl", as we must allow "duplicate_decls"
10975 to merge any attributes appropriately. We also need to wait until
10977 if (!DECL_CLONED_FUNCTION_P (decl1))
10978 determine_visibility (decl1);
10980 begin_scope (sk_function_parms, decl1);
10984 if (DECL_DESTRUCTOR_P (decl1)
10985 || (DECL_CONSTRUCTOR_P (decl1)
10986 && targetm.cxx.cdtor_returns_this ()))
10988 cdtor_label = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
10989 DECL_CONTEXT (cdtor_label) = current_function_decl;
10992 start_fname_decls ();
10994 store_parm_decls (current_function_parms);
10998 /* Like start_preparsed_function, except that instead of a
10999 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
11001 Returns 1 on success. If the DECLARATOR is not suitable for a function
11002 (it defines a datum instead), we return 0, which tells
11003 yyparse to report a parse error. */
11006 start_function (cp_decl_specifier_seq *declspecs,
11007 const cp_declarator *declarator,
11012 decl1 = grokdeclarator (declarator, declspecs, FUNCDEF, 1, &attrs);
11013 /* If the declarator is not suitable for a function definition,
11014 cause a syntax error. */
11015 if (decl1 == NULL_TREE || TREE_CODE (decl1) != FUNCTION_DECL)
11018 if (DECL_MAIN_P (decl1))
11019 /* main must return int. grokfndecl should have corrected it
11020 (and issued a diagnostic) if the user got it wrong. */
11021 gcc_assert (same_type_p (TREE_TYPE (TREE_TYPE (decl1)),
11022 integer_type_node));
11024 start_preparsed_function (decl1, attrs, /*flags=*/SF_DEFAULT);
11029 /* Returns true iff an EH_SPEC_BLOCK should be created in the body of
11033 use_eh_spec_block (tree fn)
11035 return (flag_exceptions && flag_enforce_eh_specs
11036 && !processing_template_decl
11037 && TYPE_RAISES_EXCEPTIONS (TREE_TYPE (fn))
11038 /* We insert the EH_SPEC_BLOCK only in the original
11039 function; then, it is copied automatically to the
11041 && !DECL_CLONED_FUNCTION_P (fn)
11042 /* Implicitly-generated constructors and destructors have
11043 exception specifications. However, those specifications
11044 are the union of the possible exceptions specified by the
11045 constructors/destructors for bases and members, so no
11046 unallowed exception will ever reach this function. By
11047 not creating the EH_SPEC_BLOCK we save a little memory,
11048 and we avoid spurious warnings about unreachable
11050 && !DECL_ARTIFICIAL (fn));
11053 /* Store the parameter declarations into the current function declaration.
11054 This is called after parsing the parameter declarations, before
11055 digesting the body of the function.
11057 Also install to binding contour return value identifier, if any. */
11060 store_parm_decls (tree current_function_parms)
11062 tree fndecl = current_function_decl;
11065 /* This is a chain of any other decls that came in among the parm
11066 declarations. If a parm is declared with enum {foo, bar} x;
11067 then CONST_DECLs for foo and bar are put here. */
11068 tree nonparms = NULL_TREE;
11070 if (current_function_parms)
11072 /* This case is when the function was defined with an ANSI prototype.
11073 The parms already have decls, so we need not do anything here
11074 except record them as in effect
11075 and complain if any redundant old-style parm decls were written. */
11077 tree specparms = current_function_parms;
11080 /* Must clear this because it might contain TYPE_DECLs declared
11082 current_binding_level->names = NULL;
11084 /* If we're doing semantic analysis, then we'll call pushdecl
11085 for each of these. We must do them in reverse order so that
11086 they end in the correct forward order. */
11087 specparms = nreverse (specparms);
11089 for (parm = specparms; parm; parm = next)
11091 next = TREE_CHAIN (parm);
11092 if (TREE_CODE (parm) == PARM_DECL)
11094 if (DECL_NAME (parm) == NULL_TREE
11095 || TREE_CODE (parm) != VOID_TYPE)
11098 error ("parameter %qD declared void", parm);
11102 /* If we find an enum constant or a type tag,
11103 put it aside for the moment. */
11104 TREE_CHAIN (parm) = NULL_TREE;
11105 nonparms = chainon (nonparms, parm);
11109 /* Get the decls in their original chain order and record in the
11110 function. This is all and only the PARM_DECLs that were
11111 pushed into scope by the loop above. */
11112 DECL_ARGUMENTS (fndecl) = getdecls ();
11115 DECL_ARGUMENTS (fndecl) = NULL_TREE;
11117 /* Now store the final chain of decls for the arguments
11118 as the decl-chain of the current lexical scope.
11119 Put the enumerators in as well, at the front so that
11120 DECL_ARGUMENTS is not modified. */
11121 current_binding_level->names = chainon (nonparms, DECL_ARGUMENTS (fndecl));
11123 if (use_eh_spec_block (current_function_decl))
11124 current_eh_spec_block = begin_eh_spec_block ();
11128 /* We have finished doing semantic analysis on DECL, but have not yet
11129 generated RTL for its body. Save away our current state, so that
11130 when we want to generate RTL later we know what to do. */
11133 save_function_data (tree decl)
11135 struct language_function *f;
11137 /* Save the language-specific per-function data so that we can
11138 get it back when we really expand this function. */
11139 gcc_assert (!DECL_PENDING_INLINE_P (decl));
11142 f = GGC_NEW (struct language_function);
11143 memcpy (f, cp_function_chain, sizeof (struct language_function));
11144 DECL_SAVED_FUNCTION_DATA (decl) = f;
11146 /* Clear out the bits we don't need. */
11147 f->base.x_stmt_tree.x_cur_stmt_list = NULL_TREE;
11148 f->bindings = NULL;
11149 f->x_local_names = NULL;
11153 /* Set the return value of the constructor (if present). */
11156 finish_constructor_body (void)
11161 if (targetm.cxx.cdtor_returns_this ())
11163 /* Any return from a constructor will end up here. */
11164 add_stmt (build_stmt (LABEL_EXPR, cdtor_label));
11166 val = DECL_ARGUMENTS (current_function_decl);
11167 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
11168 DECL_RESULT (current_function_decl), val);
11169 /* Return the address of the object. */
11170 exprstmt = build_stmt (RETURN_EXPR, val);
11171 add_stmt (exprstmt);
11175 /* Do all the processing for the beginning of a destructor; set up the
11176 vtable pointers and cleanups for bases and members. */
11179 begin_destructor_body (void)
11181 tree compound_stmt;
11183 /* If the CURRENT_CLASS_TYPE is incomplete, we will have already
11184 issued an error message. We still want to try to process the
11185 body of the function, but initialize_vtbl_ptrs will crash if
11186 TYPE_BINFO is NULL. */
11187 if (COMPLETE_TYPE_P (current_class_type))
11189 compound_stmt = begin_compound_stmt (0);
11190 /* Make all virtual function table pointers in non-virtual base
11191 classes point to CURRENT_CLASS_TYPE's virtual function
11193 initialize_vtbl_ptrs (current_class_ptr);
11194 finish_compound_stmt (compound_stmt);
11196 /* And insert cleanups for our bases and members so that they
11197 will be properly destroyed if we throw. */
11198 push_base_cleanups ();
11202 /* At the end of every destructor we generate code to delete the object if
11203 necessary. Do that now. */
11206 finish_destructor_body (void)
11210 /* Any return from a destructor will end up here; that way all base
11211 and member cleanups will be run when the function returns. */
11212 add_stmt (build_stmt (LABEL_EXPR, cdtor_label));
11214 /* In a virtual destructor, we must call delete. */
11215 if (DECL_VIRTUAL_P (current_function_decl))
11218 tree virtual_size = cxx_sizeof (current_class_type);
11222 At the point of definition of a virtual destructor (including
11223 an implicit definition), non-placement operator delete shall
11224 be looked up in the scope of the destructor's class and if
11225 found shall be accessible and unambiguous. */
11226 exprstmt = build_op_delete_call(DELETE_EXPR, current_class_ptr,
11228 /*global_p=*/false,
11229 /*placement=*/NULL_TREE,
11230 /*alloc_fn=*/NULL_TREE);
11232 if_stmt = begin_if_stmt ();
11233 finish_if_stmt_cond (build2 (BIT_AND_EXPR, integer_type_node,
11234 current_in_charge_parm,
11237 finish_expr_stmt (exprstmt);
11238 finish_then_clause (if_stmt);
11239 finish_if_stmt (if_stmt);
11242 if (targetm.cxx.cdtor_returns_this ())
11246 val = DECL_ARGUMENTS (current_function_decl);
11247 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
11248 DECL_RESULT (current_function_decl), val);
11249 /* Return the address of the object. */
11250 exprstmt = build_stmt (RETURN_EXPR, val);
11251 add_stmt (exprstmt);
11255 /* Do the necessary processing for the beginning of a function body, which
11256 in this case includes member-initializers, but not the catch clauses of
11257 a function-try-block. Currently, this means opening a binding level
11258 for the member-initializers (in a ctor) and member cleanups (in a dtor). */
11261 begin_function_body (void)
11265 if (! FUNCTION_NEEDS_BODY_BLOCK (current_function_decl))
11268 if (processing_template_decl)
11269 /* Do nothing now. */;
11271 /* Always keep the BLOCK node associated with the outermost pair of
11272 curly braces of a function. These are needed for correct
11273 operation of dwarfout.c. */
11274 keep_next_level (true);
11276 stmt = begin_compound_stmt (BCS_FN_BODY);
11278 if (processing_template_decl)
11279 /* Do nothing now. */;
11280 else if (DECL_DESTRUCTOR_P (current_function_decl))
11281 begin_destructor_body ();
11286 /* Do the processing for the end of a function body. Currently, this means
11287 closing out the cleanups for fully-constructed bases and members, and in
11288 the case of the destructor, deleting the object if desired. Again, this
11289 is only meaningful for [cd]tors, since they are the only functions where
11290 there is a significant distinction between the main body and any
11291 function catch clauses. Handling, say, main() return semantics here
11292 would be wrong, as flowing off the end of a function catch clause for
11293 main() would also need to return 0. */
11296 finish_function_body (tree compstmt)
11298 if (compstmt == NULL_TREE)
11301 /* Close the block. */
11302 finish_compound_stmt (compstmt);
11304 if (processing_template_decl)
11305 /* Do nothing now. */;
11306 else if (DECL_CONSTRUCTOR_P (current_function_decl))
11307 finish_constructor_body ();
11308 else if (DECL_DESTRUCTOR_P (current_function_decl))
11309 finish_destructor_body ();
11312 /* Given a function, returns the BLOCK corresponding to the outermost level
11313 of curly braces, skipping the artificial block created for constructor
11317 outer_curly_brace_block (tree fndecl)
11319 tree block = BLOCK_SUBBLOCKS (DECL_INITIAL (fndecl));
11320 if (FUNCTION_NEEDS_BODY_BLOCK (current_function_decl))
11321 /* Skip the artificial function body block. */
11322 block = BLOCK_SUBBLOCKS (block);
11326 /* Finish up a function declaration and compile that function
11327 all the way to assembler language output. The free the storage
11328 for the function definition.
11330 FLAGS is a bitwise or of the following values:
11332 We just finished processing the body of an in-class inline
11333 function definition. (This processing will have taken place
11334 after the class definition is complete.) */
11337 finish_function (int flags)
11339 tree fndecl = current_function_decl;
11340 tree fntype, ctype = NULL_TREE;
11341 int inclass_inline = (flags & 2) != 0;
11344 /* When we get some parse errors, we can end up without a
11345 current_function_decl, so cope. */
11346 if (fndecl == NULL_TREE)
11347 return error_mark_node;
11349 if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fndecl)
11350 && DECL_VIRTUAL_P (fndecl)
11351 && !processing_template_decl)
11353 tree fnclass = DECL_CONTEXT (fndecl);
11354 if (fndecl == CLASSTYPE_KEY_METHOD (fnclass))
11355 keyed_classes = tree_cons (NULL_TREE, fnclass, keyed_classes);
11358 nested = function_depth > 1;
11359 fntype = TREE_TYPE (fndecl);
11361 /* TREE_READONLY (fndecl) = 1;
11362 This caused &foo to be of type ptr-to-const-function
11363 which then got a warning when stored in a ptr-to-function variable. */
11365 gcc_assert (building_stmt_tree ());
11366 /* The current function is being defined, so its DECL_INITIAL should
11367 be set, and unless there's a multiple definition, it should be
11368 error_mark_node. */
11369 gcc_assert (DECL_INITIAL (fndecl) == error_mark_node);
11371 /* For a cloned function, we've already got all the code we need;
11372 there's no need to add any extra bits. */
11373 if (!DECL_CLONED_FUNCTION_P (fndecl))
11375 if (DECL_MAIN_P (current_function_decl))
11379 /* Make it so that `main' always returns 0 by default (or
11382 stmt = finish_return_stmt (integer_one_node);
11384 stmt = finish_return_stmt (integer_zero_node);
11386 /* Hack. We don't want the middle-end to warn that this
11387 return is unreachable, so put the statement on the
11389 #ifdef USE_MAPPED_LOCATION
11390 SET_EXPR_LOCATION (stmt, UNKNOWN_LOCATION);
11392 annotate_with_file_line (stmt, input_filename, 0);
11396 if (use_eh_spec_block (current_function_decl))
11397 finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
11398 (TREE_TYPE (current_function_decl)),
11399 current_eh_spec_block);
11402 /* If we're saving up tree structure, tie off the function now. */
11403 DECL_SAVED_TREE (fndecl) = pop_stmt_list (DECL_SAVED_TREE (fndecl));
11405 finish_fname_decls ();
11407 /* If this function can't throw any exceptions, remember that. */
11408 if (!processing_template_decl
11409 && !cp_function_chain->can_throw
11410 && !flag_non_call_exceptions
11411 && !DECL_REPLACEABLE_P (fndecl))
11412 TREE_NOTHROW (fndecl) = 1;
11414 /* This must come after expand_function_end because cleanups might
11415 have declarations (from inline functions) that need to go into
11416 this function's blocks. */
11418 /* If the current binding level isn't the outermost binding level
11419 for this function, either there is a bug, or we have experienced
11420 syntax errors and the statement tree is malformed. */
11421 if (current_binding_level->kind != sk_function_parms)
11423 /* Make sure we have already experienced errors. */
11424 gcc_assert (errorcount);
11426 /* Throw away the broken statement tree and extra binding
11428 DECL_SAVED_TREE (fndecl) = alloc_stmt_list ();
11430 while (current_binding_level->kind != sk_function_parms)
11432 if (current_binding_level->kind == sk_class)
11433 pop_nested_class ();
11435 poplevel (0, 0, 0);
11438 poplevel (1, 0, 1);
11440 /* Statements should always be full-expressions at the outermost set
11441 of curly braces for a function. */
11442 gcc_assert (stmts_are_full_exprs_p ());
11444 /* Set up the named return value optimization, if we can. Candidate
11445 variables are selected in check_return_value. */
11446 if (current_function_return_value)
11448 tree r = current_function_return_value;
11451 if (r != error_mark_node
11452 /* This is only worth doing for fns that return in memory--and
11453 simpler, since we don't have to worry about promoted modes. */
11454 && aggregate_value_p (TREE_TYPE (TREE_TYPE (fndecl)), fndecl)
11455 /* Only allow this for variables declared in the outer scope of
11456 the function so we know that their lifetime always ends with a
11457 return; see g++.dg/opt/nrv6.C. We could be more flexible if
11458 we were to do this optimization in tree-ssa. */
11459 && (outer = outer_curly_brace_block (fndecl))
11460 && chain_member (r, BLOCK_VARS (outer)))
11461 finalize_nrv (&DECL_SAVED_TREE (fndecl), r, DECL_RESULT (fndecl));
11463 current_function_return_value = NULL_TREE;
11466 /* Remember that we were in class scope. */
11467 if (current_class_name)
11468 ctype = current_class_type;
11470 /* Must mark the RESULT_DECL as being in this function. */
11471 DECL_CONTEXT (DECL_RESULT (fndecl)) = fndecl;
11473 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
11474 to the FUNCTION_DECL node itself. */
11475 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl)) = fndecl;
11477 /* Save away current state, if appropriate. */
11478 if (!processing_template_decl)
11479 save_function_data (fndecl);
11481 /* Complain if there's just no return statement. */
11482 if (warn_return_type
11483 && TREE_CODE (TREE_TYPE (fntype)) != VOID_TYPE
11484 && !dependent_type_p (TREE_TYPE (fntype))
11485 && !current_function_returns_value && !current_function_returns_null
11486 /* Don't complain if we abort or throw. */
11487 && !current_function_returns_abnormally
11488 && !DECL_NAME (DECL_RESULT (fndecl))
11489 /* Normally, with -Wreturn-type, flow will complain. Unless we're an
11490 inline function, as we might never be compiled separately. */
11491 && (DECL_INLINE (fndecl) || processing_template_decl)
11492 /* Structor return values (if any) are set by the compiler. */
11493 && !DECL_CONSTRUCTOR_P (fndecl)
11494 && !DECL_DESTRUCTOR_P (fndecl))
11495 warning (OPT_Wreturn_type, "no return statement in function returning non-void");
11497 /* Store the end of the function, so that we get good line number
11498 info for the epilogue. */
11499 cfun->function_end_locus = input_location;
11501 /* Genericize before inlining. */
11502 if (!processing_template_decl)
11504 struct language_function *f = DECL_SAVED_FUNCTION_DATA (fndecl);
11505 cp_genericize (fndecl);
11506 /* Clear out the bits we don't need. */
11507 f->x_current_class_ptr = NULL;
11508 f->x_current_class_ref = NULL;
11509 f->x_eh_spec_block = NULL;
11510 f->x_in_charge_parm = NULL;
11511 f->x_vtt_parm = NULL;
11512 f->x_return_value = NULL;
11513 f->bindings = NULL;
11514 f->extern_decl_map = NULL;
11516 /* Handle attribute((warn_unused_result)). Relies on gimple input. */
11517 c_warn_unused_result (&DECL_SAVED_TREE (fndecl));
11519 /* Clear out the bits we don't need. */
11520 local_names = NULL;
11522 /* We're leaving the context of this function, so zap cfun. It's still in
11523 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
11525 current_function_decl = NULL;
11527 /* If this is an in-class inline definition, we may have to pop the
11528 bindings for the template parameters that we added in
11529 maybe_begin_member_template_processing when start_function was
11531 if (inclass_inline)
11532 maybe_end_member_template_processing ();
11534 /* Leave the scope of the class. */
11536 pop_nested_class ();
11542 /* Let the error reporting routines know that we're outside a
11543 function. For a nested function, this value is used in
11544 cxx_pop_function_context and then reset via pop_function_context. */
11545 current_function_decl = NULL_TREE;
11550 /* Create the FUNCTION_DECL for a function definition.
11551 DECLSPECS and DECLARATOR are the parts of the declaration;
11552 they describe the return type and the name of the function,
11553 but twisted together in a fashion that parallels the syntax of C.
11555 This function creates a binding context for the function body
11556 as well as setting up the FUNCTION_DECL in current_function_decl.
11558 Returns a FUNCTION_DECL on success.
11560 If the DECLARATOR is not suitable for a function (it defines a datum
11561 instead), we return 0, which tells yyparse to report a parse error.
11563 May return void_type_node indicating that this method is actually
11564 a friend. See grokfield for more details.
11566 Came here with a `.pushlevel' .
11568 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
11569 CHANGES TO CODE IN `grokfield'. */
11572 start_method (cp_decl_specifier_seq *declspecs,
11573 const cp_declarator *declarator, tree attrlist)
11575 tree fndecl = grokdeclarator (declarator, declspecs, MEMFUNCDEF, 0,
11578 if (fndecl == error_mark_node)
11579 return error_mark_node;
11581 if (fndecl == NULL || TREE_CODE (fndecl) != FUNCTION_DECL)
11583 error ("invalid member function declaration");
11584 return error_mark_node;
11588 cplus_decl_attributes (&fndecl, attrlist, 0);
11590 /* Pass friends other than inline friend functions back. */
11591 if (fndecl == void_type_node)
11594 if (DECL_IN_AGGR_P (fndecl))
11596 if (DECL_CONTEXT (fndecl)
11597 && TREE_CODE (DECL_CONTEXT (fndecl)) != NAMESPACE_DECL)
11598 error ("%qD is already defined in class %qT", fndecl,
11599 DECL_CONTEXT (fndecl));
11600 return error_mark_node;
11603 check_template_shadow (fndecl);
11605 DECL_DECLARED_INLINE_P (fndecl) = 1;
11606 if (flag_default_inline)
11607 DECL_INLINE (fndecl) = 1;
11609 /* We process method specializations in finish_struct_1. */
11610 if (processing_template_decl && !DECL_TEMPLATE_SPECIALIZATION (fndecl))
11612 fndecl = push_template_decl (fndecl);
11613 if (fndecl == error_mark_node)
11617 if (! DECL_FRIEND_P (fndecl))
11619 if (TREE_CHAIN (fndecl))
11621 fndecl = copy_node (fndecl);
11622 TREE_CHAIN (fndecl) = NULL_TREE;
11626 finish_decl (fndecl, NULL_TREE, NULL_TREE);
11628 /* Make a place for the parms. */
11629 begin_scope (sk_function_parms, fndecl);
11631 DECL_IN_AGGR_P (fndecl) = 1;
11635 /* Go through the motions of finishing a function definition.
11636 We don't compile this method until after the whole class has
11639 FINISH_METHOD must return something that looks as though it
11640 came from GROKFIELD (since we are defining a method, after all).
11642 This is called after parsing the body of the function definition.
11643 STMTS is the chain of statements that makes up the function body.
11645 DECL is the ..._DECL that `start_method' provided. */
11648 finish_method (tree decl)
11650 tree fndecl = decl;
11655 if (decl == void_type_node)
11658 old_initial = DECL_INITIAL (fndecl);
11660 /* Undo the level for the parms (from start_method).
11661 This is like poplevel, but it causes nothing to be
11662 saved. Saving information here confuses symbol-table
11663 output routines. Besides, this information will
11664 be correctly output when this method is actually
11667 /* Clear out the meanings of the local variables of this level;
11668 also record in each decl which block it belongs to. */
11670 for (link = current_binding_level->names; link; link = TREE_CHAIN (link))
11672 if (DECL_NAME (link) != NULL_TREE)
11673 pop_binding (DECL_NAME (link), link);
11674 gcc_assert (TREE_CODE (link) != FUNCTION_DECL);
11675 DECL_CONTEXT (link) = NULL_TREE;
11678 poplevel (0, 0, 0);
11680 DECL_INITIAL (fndecl) = old_initial;
11682 /* We used to check if the context of FNDECL was different from
11683 current_class_type as another way to get inside here. This didn't work
11684 for String.cc in libg++. */
11685 if (DECL_FRIEND_P (fndecl))
11687 VEC_safe_push (tree, gc, CLASSTYPE_INLINE_FRIENDS (current_class_type),
11689 decl = void_type_node;
11696 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
11697 we can lay it out later, when and if its type becomes complete. */
11700 maybe_register_incomplete_var (tree var)
11702 gcc_assert (TREE_CODE (var) == VAR_DECL);
11704 /* Keep track of variables with incomplete types. */
11705 if (!processing_template_decl && TREE_TYPE (var) != error_mark_node
11706 && DECL_EXTERNAL (var))
11708 tree inner_type = TREE_TYPE (var);
11710 while (TREE_CODE (inner_type) == ARRAY_TYPE)
11711 inner_type = TREE_TYPE (inner_type);
11712 inner_type = TYPE_MAIN_VARIANT (inner_type);
11714 if ((!COMPLETE_TYPE_P (inner_type) && CLASS_TYPE_P (inner_type))
11715 /* RTTI TD entries are created while defining the type_info. */
11716 || (TYPE_LANG_SPECIFIC (inner_type)
11717 && TYPE_BEING_DEFINED (inner_type)))
11718 incomplete_vars = tree_cons (inner_type, var, incomplete_vars);
11722 /* Called when a class type (given by TYPE) is defined. If there are
11723 any existing VAR_DECLs whose type hsa been completed by this
11724 declaration, update them now. */
11727 complete_vars (tree type)
11729 tree *list = &incomplete_vars;
11731 gcc_assert (CLASS_TYPE_P (type));
11734 if (same_type_p (type, TREE_PURPOSE (*list)))
11736 tree var = TREE_VALUE (*list);
11737 tree type = TREE_TYPE (var);
11738 /* Complete the type of the variable. The VAR_DECL itself
11739 will be laid out in expand_expr. */
11740 complete_type (type);
11741 cp_apply_type_quals_to_decl (cp_type_quals (type), var);
11742 /* Remove this entry from the list. */
11743 *list = TREE_CHAIN (*list);
11746 list = &TREE_CHAIN (*list);
11749 /* Check for pending declarations which may have abstract type. */
11750 complete_type_check_abstract (type);
11753 /* If DECL is of a type which needs a cleanup, build and return an
11754 expression to perform that cleanup here. Return NULL_TREE if no
11755 cleanup need be done. */
11758 cxx_maybe_build_cleanup (tree decl)
11764 /* Assume no cleanup is required. */
11765 cleanup = NULL_TREE;
11767 if (error_operand_p (decl))
11770 /* Handle "__attribute__((cleanup))". We run the cleanup function
11771 before the destructor since the destructor is what actually
11772 terminates the lifetime of the object. */
11773 attr = lookup_attribute ("cleanup", DECL_ATTRIBUTES (decl));
11780 /* Get the name specified by the user for the cleanup function. */
11781 id = TREE_VALUE (TREE_VALUE (attr));
11782 /* Look up the name to find the cleanup function to call. It is
11783 important to use lookup_name here because that is what is
11784 used in c-common.c:handle_cleanup_attribute when performing
11785 initial checks on the attribute. Note that those checks
11786 include ensuring that the function found is not an overloaded
11787 function, or an object with an overloaded call operator,
11788 etc.; we can rely on the fact that the functionfound is an
11789 ordinary FUNCTION_DECL. */
11790 fn = lookup_name (id);
11791 arg = build_address (decl);
11793 cleanup = build_function_call (fn, build_tree_list (NULL_TREE,
11796 /* Handle ordinary C++ destructors. */
11797 type = TREE_TYPE (decl);
11798 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
11800 int flags = LOOKUP_NORMAL|LOOKUP_DESTRUCTOR;
11801 bool has_vbases = (TREE_CODE (type) == RECORD_TYPE
11802 && CLASSTYPE_VBASECLASSES (type));
11806 if (TREE_CODE (type) == ARRAY_TYPE)
11810 cxx_mark_addressable (decl);
11811 addr = build_unary_op (ADDR_EXPR, decl, 0);
11814 /* Optimize for space over speed here. */
11815 if (!has_vbases || flag_expensive_optimizations)
11816 flags |= LOOKUP_NONVIRTUAL;
11818 call = build_delete (TREE_TYPE (addr), addr,
11819 sfk_complete_destructor, flags, 0);
11821 cleanup = build_compound_expr (cleanup, call);
11829 /* When a stmt has been parsed, this function is called. */
11836 /* DECL was originally constructed as a non-static member function,
11837 but turned out to be static. Update it accordingly. */
11840 revert_static_member_fn (tree decl)
11843 tree function = TREE_TYPE (decl);
11844 tree args = TYPE_ARG_TYPES (function);
11846 if (cp_type_quals (TREE_TYPE (TREE_VALUE (args)))
11847 != TYPE_UNQUALIFIED)
11848 error ("static member function %q#D declared with type qualifiers", decl);
11850 args = TREE_CHAIN (args);
11851 tmp = build_function_type (TREE_TYPE (function), args);
11852 tmp = build_qualified_type (tmp, cp_type_quals (function));
11853 tmp = build_exception_variant (tmp,
11854 TYPE_RAISES_EXCEPTIONS (function));
11855 TREE_TYPE (decl) = tmp;
11856 if (DECL_ARGUMENTS (decl))
11857 DECL_ARGUMENTS (decl) = TREE_CHAIN (DECL_ARGUMENTS (decl));
11858 DECL_STATIC_FUNCTION_P (decl) = 1;
11861 /* Initialize the variables used during compilation of a C++
11865 cxx_push_function_context (struct function * f)
11867 struct language_function *p = GGC_CNEW (struct language_function);
11870 /* Whenever we start a new function, we destroy temporaries in the
11872 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
11878 if (DECL_SAVED_FUNCTION_DATA (fn))
11880 /* If we already parsed this function, and we're just expanding it
11881 now, restore saved state. */
11882 *cp_function_chain = *DECL_SAVED_FUNCTION_DATA (fn);
11884 /* We don't need the saved data anymore. Unless this is an inline
11885 function; we need the named return value info for
11886 declare_return_variable. */
11887 if (! DECL_INLINE (fn))
11888 DECL_SAVED_FUNCTION_DATA (fn) = NULL;
11893 /* Free the language-specific parts of F, now that we've finished
11894 compiling the function. */
11897 cxx_pop_function_context (struct function * f)
11902 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
11903 one of the language-independent trees. */
11905 enum cp_tree_node_structure_enum
11906 cp_tree_node_structure (union lang_tree_node * t)
11908 switch (TREE_CODE (&t->generic))
11910 case DEFAULT_ARG: return TS_CP_DEFAULT_ARG;
11911 case IDENTIFIER_NODE: return TS_CP_IDENTIFIER;
11912 case OVERLOAD: return TS_CP_OVERLOAD;
11913 case TEMPLATE_PARM_INDEX: return TS_CP_TPI;
11914 case TINST_LEVEL: return TS_CP_TINST_LEVEL;
11915 case PTRMEM_CST: return TS_CP_PTRMEM;
11916 case BASELINK: return TS_CP_BASELINK;
11917 case STATIC_ASSERT: return TS_CP_STATIC_ASSERT;
11918 case ARGUMENT_PACK_SELECT: return TS_CP_ARGUMENT_PACK_SELECT;
11919 case TRAIT_EXPR: return TS_CP_TRAIT_EXPR;
11920 default: return TS_CP_GENERIC;
11924 /* Build the void_list_node (void_type_node having been created). */
11926 build_void_list_node (void)
11928 tree t = build_tree_list (NULL_TREE, void_type_node);
11933 cp_missing_noreturn_ok_p (tree decl)
11935 /* A missing noreturn is ok for the `main' function. */
11936 return DECL_MAIN_P (decl);
11939 /* Return the COMDAT group into which DECL should be placed. */
11942 cxx_comdat_group (tree decl)
11946 /* Virtual tables, construction virtual tables, and virtual table
11947 tables all go in a single COMDAT group, named after the primary
11949 if (TREE_CODE (decl) == VAR_DECL && DECL_VTABLE_OR_VTT_P (decl))
11950 name = DECL_ASSEMBLER_NAME (CLASSTYPE_VTABLES (DECL_CONTEXT (decl)));
11951 /* For all other DECLs, the COMDAT group is the mangled name of the
11952 declaration itself. */
11955 while (DECL_THUNK_P (decl))
11957 /* If TARGET_USE_LOCAL_THUNK_ALIAS_P, use_thunk puts the thunk
11958 into the same section as the target function. In that case
11959 we must return target's name. */
11960 tree target = THUNK_TARGET (decl);
11961 if (TARGET_USE_LOCAL_THUNK_ALIAS_P (target)
11962 && DECL_SECTION_NAME (target) != NULL
11963 && DECL_ONE_ONLY (target))
11968 name = DECL_ASSEMBLER_NAME (decl);
11971 return IDENTIFIER_POINTER (name);
11974 #include "gt-cp-decl.h"