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 if ((TREE_CODE (olddecl) == TYPE_DECL && DECL_ARTIFICIAL (olddecl)
1301 && TREE_CODE (newdecl) != TYPE_DECL
1302 && ! (TREE_CODE (newdecl) == TEMPLATE_DECL
1303 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL))
1304 || (TREE_CODE (newdecl) == TYPE_DECL && DECL_ARTIFICIAL (newdecl)
1305 && TREE_CODE (olddecl) != TYPE_DECL
1306 && ! (TREE_CODE (olddecl) == TEMPLATE_DECL
1307 && (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl))
1310 /* We do nothing special here, because C++ does such nasty
1311 things with TYPE_DECLs. Instead, just let the TYPE_DECL
1312 get shadowed, and know that if we need to find a TYPE_DECL
1313 for a given name, we can look in the IDENTIFIER_TYPE_VALUE
1314 slot of the identifier. */
1318 if ((TREE_CODE (newdecl) == FUNCTION_DECL
1319 && DECL_FUNCTION_TEMPLATE_P (olddecl))
1320 || (TREE_CODE (olddecl) == FUNCTION_DECL
1321 && DECL_FUNCTION_TEMPLATE_P (newdecl)))
1324 error ("%q#D redeclared as different kind of symbol", newdecl);
1325 if (TREE_CODE (olddecl) == TREE_LIST)
1326 olddecl = TREE_VALUE (olddecl);
1327 error ("previous declaration of %q+#D", olddecl);
1329 return error_mark_node;
1331 else if (!types_match)
1333 if (CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl))
1334 /* These are certainly not duplicate declarations; they're
1335 from different scopes. */
1338 if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1340 /* The name of a class template may not be declared to refer to
1341 any other template, class, function, object, namespace, value,
1342 or type in the same scope. */
1343 if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) == TYPE_DECL
1344 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
1346 error ("declaration of template %q#D", newdecl);
1347 error ("conflicts with previous declaration %q+#D", olddecl);
1349 else if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) == FUNCTION_DECL
1350 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == FUNCTION_DECL
1351 && compparms (TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl))),
1352 TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl))))
1353 && comp_template_parms (DECL_TEMPLATE_PARMS (newdecl),
1354 DECL_TEMPLATE_PARMS (olddecl))
1355 /* Template functions can be disambiguated by
1357 && same_type_p (TREE_TYPE (TREE_TYPE (newdecl)),
1358 TREE_TYPE (TREE_TYPE (olddecl))))
1360 error ("new declaration %q#D", newdecl);
1361 error ("ambiguates old declaration %q+#D", olddecl);
1365 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1367 if (DECL_EXTERN_C_P (newdecl) && DECL_EXTERN_C_P (olddecl))
1369 error ("declaration of C function %q#D conflicts with",
1371 error ("previous declaration %q+#D here", olddecl);
1373 else if (compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1374 TYPE_ARG_TYPES (TREE_TYPE (olddecl))))
1376 error ("new declaration %q#D", newdecl);
1377 error ("ambiguates old declaration %q+#D", olddecl);
1378 return error_mark_node;
1385 error ("conflicting declaration %q#D", newdecl);
1386 error ("%q+D has a previous declaration as %q#D", olddecl, olddecl);
1387 return error_mark_node;
1390 else if (TREE_CODE (newdecl) == FUNCTION_DECL
1391 && ((DECL_TEMPLATE_SPECIALIZATION (olddecl)
1392 && (!DECL_TEMPLATE_INFO (newdecl)
1393 || (DECL_TI_TEMPLATE (newdecl)
1394 != DECL_TI_TEMPLATE (olddecl))))
1395 || (DECL_TEMPLATE_SPECIALIZATION (newdecl)
1396 && (!DECL_TEMPLATE_INFO (olddecl)
1397 || (DECL_TI_TEMPLATE (olddecl)
1398 != DECL_TI_TEMPLATE (newdecl))))))
1399 /* It's OK to have a template specialization and a non-template
1400 with the same type, or to have specializations of two
1401 different templates with the same type. Note that if one is a
1402 specialization, and the other is an instantiation of the same
1403 template, that we do not exit at this point. That situation
1404 can occur if we instantiate a template class, and then
1405 specialize one of its methods. This situation is valid, but
1406 the declarations must be merged in the usual way. */
1408 else if (TREE_CODE (newdecl) == FUNCTION_DECL
1409 && ((DECL_TEMPLATE_INSTANTIATION (olddecl)
1410 && !DECL_USE_TEMPLATE (newdecl))
1411 || (DECL_TEMPLATE_INSTANTIATION (newdecl)
1412 && !DECL_USE_TEMPLATE (olddecl))))
1413 /* One of the declarations is a template instantiation, and the
1414 other is not a template at all. That's OK. */
1416 else if (TREE_CODE (newdecl) == NAMESPACE_DECL)
1418 /* In [namespace.alias] we have:
1420 In a declarative region, a namespace-alias-definition can be
1421 used to redefine a namespace-alias declared in that declarative
1422 region to refer only to the namespace to which it already
1425 Therefore, if we encounter a second alias directive for the same
1426 alias, we can just ignore the second directive. */
1427 if (DECL_NAMESPACE_ALIAS (newdecl)
1428 && (DECL_NAMESPACE_ALIAS (newdecl)
1429 == DECL_NAMESPACE_ALIAS (olddecl)))
1431 /* [namespace.alias]
1433 A namespace-name or namespace-alias shall not be declared as
1434 the name of any other entity in the same declarative region.
1435 A namespace-name defined at global scope shall not be
1436 declared as the name of any other entity in any global scope
1438 error ("declaration of namespace %qD conflicts with", newdecl);
1439 error ("previous declaration of namespace %q+D here", olddecl);
1440 return error_mark_node;
1444 const char *errmsg = redeclaration_error_message (newdecl, olddecl);
1447 error (errmsg, newdecl);
1448 if (DECL_NAME (olddecl) != NULL_TREE)
1449 error ((DECL_INITIAL (olddecl) && namespace_bindings_p ())
1450 ? "%q+#D previously defined here"
1451 : "%q+#D previously declared here", olddecl);
1452 return error_mark_node;
1454 else if (TREE_CODE (olddecl) == FUNCTION_DECL
1455 && DECL_INITIAL (olddecl) != NULL_TREE
1456 && TYPE_ARG_TYPES (TREE_TYPE (olddecl)) == NULL_TREE
1457 && TYPE_ARG_TYPES (TREE_TYPE (newdecl)) != NULL_TREE)
1459 /* Prototype decl follows defn w/o prototype. */
1460 warning (0, "prototype for %q+#D", newdecl);
1461 warning (0, "%Jfollows non-prototype definition here", olddecl);
1463 else if ((TREE_CODE (olddecl) == FUNCTION_DECL
1464 || TREE_CODE (olddecl) == VAR_DECL)
1465 && DECL_LANGUAGE (newdecl) != DECL_LANGUAGE (olddecl))
1468 If two declarations of the same function or object
1469 specify different linkage-specifications ..., the program
1470 is ill-formed.... Except for functions with C++ linkage,
1471 a function declaration without a linkage specification
1472 shall not precede the first linkage specification for
1473 that function. A function can be declared without a
1474 linkage specification after an explicit linkage
1475 specification has been seen; the linkage explicitly
1476 specified in the earlier declaration is not affected by
1477 such a function declaration.
1479 DR 563 raises the question why the restrictions on
1480 functions should not also apply to objects. Older
1481 versions of G++ silently ignore the linkage-specification
1489 which is clearly wrong. Therefore, we now treat objects
1491 if (current_lang_depth () == 0)
1493 /* There is no explicit linkage-specification, so we use
1494 the linkage from the previous declaration. */
1495 if (!DECL_LANG_SPECIFIC (newdecl))
1496 retrofit_lang_decl (newdecl);
1497 SET_DECL_LANGUAGE (newdecl, DECL_LANGUAGE (olddecl));
1501 error ("previous declaration of %q+#D with %qL linkage",
1502 olddecl, DECL_LANGUAGE (olddecl));
1503 error ("conflicts with new declaration with %qL linkage",
1504 DECL_LANGUAGE (newdecl));
1508 if (DECL_LANG_SPECIFIC (olddecl) && DECL_USE_TEMPLATE (olddecl))
1510 else if (TREE_CODE (olddecl) == FUNCTION_DECL)
1512 tree t1 = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1513 tree t2 = TYPE_ARG_TYPES (TREE_TYPE (newdecl));
1516 if (TREE_CODE (TREE_TYPE (newdecl)) == METHOD_TYPE)
1517 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2);
1519 for (; t1 && t1 != void_list_node;
1520 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2), i++)
1521 if (TREE_PURPOSE (t1) && TREE_PURPOSE (t2))
1523 if (1 == simple_cst_equal (TREE_PURPOSE (t1),
1526 pedwarn ("default argument given for parameter %d of %q#D",
1528 pedwarn ("after previous specification in %q+#D", olddecl);
1532 error ("default argument given for parameter %d of %q#D",
1534 error ("after previous specification in %q+#D",
1539 if (DECL_DECLARED_INLINE_P (newdecl)
1540 && ! DECL_DECLARED_INLINE_P (olddecl)
1541 && TREE_ADDRESSABLE (olddecl) && warn_inline)
1543 warning (0, "%q#D was used before it was declared inline", newdecl);
1544 warning (0, "%Jprevious non-inline declaration here", olddecl);
1549 /* Do not merge an implicit typedef with an explicit one. In:
1553 typedef class A A __attribute__ ((foo));
1555 the attribute should apply only to the typedef. */
1556 if (TREE_CODE (olddecl) == TYPE_DECL
1557 && (DECL_IMPLICIT_TYPEDEF_P (olddecl)
1558 || DECL_IMPLICIT_TYPEDEF_P (newdecl)))
1561 /* If new decl is `static' and an `extern' was seen previously,
1563 warn_extern_redeclared_static (newdecl, olddecl);
1565 /* We have committed to returning 1 at this point. */
1566 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1568 /* Now that functions must hold information normally held
1569 by field decls, there is extra work to do so that
1570 declaration information does not get destroyed during
1572 if (DECL_VINDEX (olddecl))
1573 DECL_VINDEX (newdecl) = DECL_VINDEX (olddecl);
1574 if (DECL_CONTEXT (olddecl))
1575 DECL_CONTEXT (newdecl) = DECL_CONTEXT (olddecl);
1576 DECL_STATIC_CONSTRUCTOR (newdecl) |= DECL_STATIC_CONSTRUCTOR (olddecl);
1577 DECL_STATIC_DESTRUCTOR (newdecl) |= DECL_STATIC_DESTRUCTOR (olddecl);
1578 DECL_PURE_VIRTUAL_P (newdecl) |= DECL_PURE_VIRTUAL_P (olddecl);
1579 DECL_VIRTUAL_P (newdecl) |= DECL_VIRTUAL_P (olddecl);
1580 DECL_INVALID_OVERRIDER_P (newdecl) |= DECL_INVALID_OVERRIDER_P (olddecl);
1581 DECL_THIS_STATIC (newdecl) |= DECL_THIS_STATIC (olddecl);
1582 if (DECL_OVERLOADED_OPERATOR_P (olddecl) != ERROR_MARK)
1583 SET_OVERLOADED_OPERATOR_CODE
1584 (newdecl, DECL_OVERLOADED_OPERATOR_P (olddecl));
1585 new_defines_function = DECL_INITIAL (newdecl) != NULL_TREE;
1587 /* Optionally warn about more than one declaration for the same
1588 name, but don't warn about a function declaration followed by a
1590 if (warn_redundant_decls && ! DECL_ARTIFICIAL (olddecl)
1591 && !(new_defines_function && DECL_INITIAL (olddecl) == NULL_TREE)
1592 /* Don't warn about extern decl followed by definition. */
1593 && !(DECL_EXTERNAL (olddecl) && ! DECL_EXTERNAL (newdecl))
1594 /* Don't warn about friends, let add_friend take care of it. */
1595 && ! (newdecl_is_friend || DECL_FRIEND_P (olddecl)))
1597 warning (OPT_Wredundant_decls, "redundant redeclaration of %qD in same scope", newdecl);
1598 warning (OPT_Wredundant_decls, "previous declaration of %q+D", olddecl);
1602 /* Deal with C++: must preserve virtual function table size. */
1603 if (TREE_CODE (olddecl) == TYPE_DECL)
1605 tree newtype = TREE_TYPE (newdecl);
1606 tree oldtype = TREE_TYPE (olddecl);
1608 if (newtype != error_mark_node && oldtype != error_mark_node
1609 && TYPE_LANG_SPECIFIC (newtype) && TYPE_LANG_SPECIFIC (oldtype))
1610 CLASSTYPE_FRIEND_CLASSES (newtype)
1611 = CLASSTYPE_FRIEND_CLASSES (oldtype);
1613 DECL_ORIGINAL_TYPE (newdecl) = DECL_ORIGINAL_TYPE (olddecl);
1616 /* Copy all the DECL_... slots specified in the new decl
1617 except for any that we copy here from the old type. */
1618 DECL_ATTRIBUTES (newdecl)
1619 = (*targetm.merge_decl_attributes) (olddecl, newdecl);
1621 if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1625 old_result = DECL_TEMPLATE_RESULT (olddecl);
1626 new_result = DECL_TEMPLATE_RESULT (newdecl);
1627 TREE_TYPE (olddecl) = TREE_TYPE (old_result);
1628 DECL_TEMPLATE_SPECIALIZATIONS (olddecl)
1629 = chainon (DECL_TEMPLATE_SPECIALIZATIONS (olddecl),
1630 DECL_TEMPLATE_SPECIALIZATIONS (newdecl));
1632 if (DECL_FUNCTION_TEMPLATE_P (newdecl))
1634 DECL_INLINE (old_result)
1635 |= DECL_INLINE (new_result);
1636 DECL_DECLARED_INLINE_P (old_result)
1637 |= DECL_DECLARED_INLINE_P (new_result);
1638 check_redeclaration_exception_specification (newdecl, olddecl);
1641 /* If the new declaration is a definition, update the file and
1642 line information on the declaration, and also make
1643 the old declaration the same definition. */
1644 if (DECL_INITIAL (old_result) == NULL_TREE
1645 && DECL_INITIAL (new_result) != NULL_TREE)
1647 DECL_SOURCE_LOCATION (olddecl)
1648 = DECL_SOURCE_LOCATION (old_result)
1649 = DECL_SOURCE_LOCATION (newdecl);
1650 DECL_INITIAL (old_result) = DECL_INITIAL (new_result);
1651 if (DECL_FUNCTION_TEMPLATE_P (newdecl))
1652 DECL_ARGUMENTS (old_result)
1653 = DECL_ARGUMENTS (new_result);
1661 /* Automatically handles default parameters. */
1662 tree oldtype = TREE_TYPE (olddecl);
1665 /* Merge the data types specified in the two decls. */
1666 newtype = merge_types (TREE_TYPE (newdecl), TREE_TYPE (olddecl));
1668 /* If merge_types produces a non-typedef type, just use the old type. */
1669 if (TREE_CODE (newdecl) == TYPE_DECL
1670 && newtype == DECL_ORIGINAL_TYPE (newdecl))
1673 if (TREE_CODE (newdecl) == VAR_DECL)
1675 DECL_THIS_EXTERN (newdecl) |= DECL_THIS_EXTERN (olddecl);
1676 DECL_INITIALIZED_P (newdecl) |= DECL_INITIALIZED_P (olddecl);
1677 DECL_NONTRIVIALLY_INITIALIZED_P (newdecl)
1678 |= DECL_NONTRIVIALLY_INITIALIZED_P (olddecl);
1679 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (newdecl)
1680 |= DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (olddecl);
1682 /* Merge the threadprivate attribute from OLDDECL into NEWDECL. */
1683 if (DECL_LANG_SPECIFIC (olddecl)
1684 && CP_DECL_THREADPRIVATE_P (olddecl))
1686 /* Allocate a LANG_SPECIFIC structure for NEWDECL, if needed. */
1687 if (!DECL_LANG_SPECIFIC (newdecl))
1688 retrofit_lang_decl (newdecl);
1690 DECL_TLS_MODEL (newdecl) = DECL_TLS_MODEL (olddecl);
1691 CP_DECL_THREADPRIVATE_P (newdecl) = 1;
1695 /* Do this after calling `merge_types' so that default
1696 parameters don't confuse us. */
1697 else if (TREE_CODE (newdecl) == FUNCTION_DECL)
1698 check_redeclaration_exception_specification (newdecl, olddecl);
1699 TREE_TYPE (newdecl) = TREE_TYPE (olddecl) = newtype;
1701 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1702 check_default_args (newdecl);
1704 /* Lay the type out, unless already done. */
1705 if (! same_type_p (newtype, oldtype)
1706 && TREE_TYPE (newdecl) != error_mark_node
1707 && !(processing_template_decl && uses_template_parms (newdecl)))
1708 layout_type (TREE_TYPE (newdecl));
1710 if ((TREE_CODE (newdecl) == VAR_DECL
1711 || TREE_CODE (newdecl) == PARM_DECL
1712 || TREE_CODE (newdecl) == RESULT_DECL
1713 || TREE_CODE (newdecl) == FIELD_DECL
1714 || TREE_CODE (newdecl) == TYPE_DECL)
1715 && !(processing_template_decl && uses_template_parms (newdecl)))
1716 layout_decl (newdecl, 0);
1718 /* Merge the type qualifiers. */
1719 if (TREE_READONLY (newdecl))
1720 TREE_READONLY (olddecl) = 1;
1721 if (TREE_THIS_VOLATILE (newdecl))
1722 TREE_THIS_VOLATILE (olddecl) = 1;
1723 if (TREE_NOTHROW (newdecl))
1724 TREE_NOTHROW (olddecl) = 1;
1726 /* Merge deprecatedness. */
1727 if (TREE_DEPRECATED (newdecl))
1728 TREE_DEPRECATED (olddecl) = 1;
1730 /* Merge the initialization information. */
1731 if (DECL_INITIAL (newdecl) == NULL_TREE
1732 && DECL_INITIAL (olddecl) != NULL_TREE)
1734 DECL_INITIAL (newdecl) = DECL_INITIAL (olddecl);
1735 DECL_SOURCE_LOCATION (newdecl) = DECL_SOURCE_LOCATION (olddecl);
1736 if (CAN_HAVE_FULL_LANG_DECL_P (newdecl)
1737 && DECL_LANG_SPECIFIC (newdecl)
1738 && DECL_LANG_SPECIFIC (olddecl))
1740 DECL_SAVED_TREE (newdecl) = DECL_SAVED_TREE (olddecl);
1741 DECL_STRUCT_FUNCTION (newdecl) = DECL_STRUCT_FUNCTION (olddecl);
1745 /* Merge the section attribute.
1746 We want to issue an error if the sections conflict but that must be
1747 done later in decl_attributes since we are called before attributes
1749 if (DECL_SECTION_NAME (newdecl) == NULL_TREE)
1750 DECL_SECTION_NAME (newdecl) = DECL_SECTION_NAME (olddecl);
1752 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1754 DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (newdecl)
1755 |= DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (olddecl);
1756 DECL_NO_LIMIT_STACK (newdecl) |= DECL_NO_LIMIT_STACK (olddecl);
1757 TREE_THIS_VOLATILE (newdecl) |= TREE_THIS_VOLATILE (olddecl);
1758 TREE_READONLY (newdecl) |= TREE_READONLY (olddecl);
1759 TREE_NOTHROW (newdecl) |= TREE_NOTHROW (olddecl);
1760 DECL_IS_MALLOC (newdecl) |= DECL_IS_MALLOC (olddecl);
1761 DECL_IS_PURE (newdecl) |= DECL_IS_PURE (olddecl);
1762 /* Keep the old RTL. */
1763 COPY_DECL_RTL (olddecl, newdecl);
1765 else if (TREE_CODE (newdecl) == VAR_DECL
1766 && (DECL_SIZE (olddecl) || !DECL_SIZE (newdecl)))
1768 /* Keep the old RTL. We cannot keep the old RTL if the old
1769 declaration was for an incomplete object and the new
1770 declaration is not since many attributes of the RTL will
1772 COPY_DECL_RTL (olddecl, newdecl);
1775 /* If cannot merge, then use the new type and qualifiers,
1776 and don't preserve the old rtl. */
1779 /* Clean out any memory we had of the old declaration. */
1780 tree oldstatic = value_member (olddecl, static_aggregates);
1782 TREE_VALUE (oldstatic) = error_mark_node;
1784 TREE_TYPE (olddecl) = TREE_TYPE (newdecl);
1785 TREE_READONLY (olddecl) = TREE_READONLY (newdecl);
1786 TREE_THIS_VOLATILE (olddecl) = TREE_THIS_VOLATILE (newdecl);
1787 TREE_SIDE_EFFECTS (olddecl) = TREE_SIDE_EFFECTS (newdecl);
1790 /* Merge the storage class information. */
1791 merge_weak (newdecl, olddecl);
1793 DECL_ONE_ONLY (newdecl) |= DECL_ONE_ONLY (olddecl);
1794 DECL_DEFER_OUTPUT (newdecl) |= DECL_DEFER_OUTPUT (olddecl);
1795 TREE_PUBLIC (newdecl) = TREE_PUBLIC (olddecl);
1796 TREE_STATIC (olddecl) = TREE_STATIC (newdecl) |= TREE_STATIC (olddecl);
1797 if (! DECL_EXTERNAL (olddecl))
1798 DECL_EXTERNAL (newdecl) = 0;
1800 new_template = NULL_TREE;
1801 if (DECL_LANG_SPECIFIC (newdecl) && DECL_LANG_SPECIFIC (olddecl))
1803 DECL_INTERFACE_KNOWN (newdecl) |= DECL_INTERFACE_KNOWN (olddecl);
1804 DECL_NOT_REALLY_EXTERN (newdecl) |= DECL_NOT_REALLY_EXTERN (olddecl);
1805 DECL_COMDAT (newdecl) |= DECL_COMDAT (olddecl);
1806 DECL_TEMPLATE_INSTANTIATED (newdecl)
1807 |= DECL_TEMPLATE_INSTANTIATED (olddecl);
1809 /* If the OLDDECL is an instantiation and/or specialization,
1810 then the NEWDECL must be too. But, it may not yet be marked
1811 as such if the caller has created NEWDECL, but has not yet
1812 figured out that it is a redeclaration. */
1813 if (!DECL_USE_TEMPLATE (newdecl))
1814 DECL_USE_TEMPLATE (newdecl) = DECL_USE_TEMPLATE (olddecl);
1816 /* Don't really know how much of the language-specific
1817 values we should copy from old to new. */
1818 DECL_IN_AGGR_P (newdecl) = DECL_IN_AGGR_P (olddecl);
1819 DECL_LANG_SPECIFIC (newdecl)->decl_flags.u2 =
1820 DECL_LANG_SPECIFIC (olddecl)->decl_flags.u2;
1821 DECL_NONCONVERTING_P (newdecl) = DECL_NONCONVERTING_P (olddecl);
1822 DECL_REPO_AVAILABLE_P (newdecl) = DECL_REPO_AVAILABLE_P (olddecl);
1823 if (DECL_TEMPLATE_INFO (newdecl))
1824 new_template = DECL_TI_TEMPLATE (newdecl);
1825 DECL_TEMPLATE_INFO (newdecl) = DECL_TEMPLATE_INFO (olddecl);
1826 DECL_INITIALIZED_IN_CLASS_P (newdecl)
1827 |= DECL_INITIALIZED_IN_CLASS_P (olddecl);
1828 olddecl_friend = DECL_FRIEND_P (olddecl);
1829 hidden_friend = (DECL_ANTICIPATED (olddecl)
1830 && DECL_HIDDEN_FRIEND_P (olddecl)
1831 && newdecl_is_friend);
1833 /* Only functions have DECL_BEFRIENDING_CLASSES. */
1834 if (TREE_CODE (newdecl) == FUNCTION_DECL
1835 || DECL_FUNCTION_TEMPLATE_P (newdecl))
1837 DECL_BEFRIENDING_CLASSES (newdecl)
1838 = chainon (DECL_BEFRIENDING_CLASSES (newdecl),
1839 DECL_BEFRIENDING_CLASSES (olddecl));
1840 /* DECL_THUNKS is only valid for virtual functions,
1841 otherwise it is a DECL_FRIEND_CONTEXT. */
1842 if (DECL_VIRTUAL_P (newdecl))
1843 DECL_THUNKS (newdecl) = DECL_THUNKS (olddecl);
1847 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1849 if (DECL_TEMPLATE_INSTANTIATION (olddecl)
1850 && !DECL_TEMPLATE_INSTANTIATION (newdecl))
1852 /* If newdecl is not a specialization, then it is not a
1853 template-related function at all. And that means that we
1854 should have exited above, returning 0. */
1855 gcc_assert (DECL_TEMPLATE_SPECIALIZATION (newdecl));
1857 if (TREE_USED (olddecl))
1858 /* From [temp.expl.spec]:
1860 If a template, a member template or the member of a class
1861 template is explicitly specialized then that
1862 specialization shall be declared before the first use of
1863 that specialization that would cause an implicit
1864 instantiation to take place, in every translation unit in
1865 which such a use occurs. */
1866 error ("explicit specialization of %qD after first use",
1869 SET_DECL_TEMPLATE_SPECIALIZATION (olddecl);
1871 /* Don't propagate visibility from the template to the
1872 specialization here. We'll do that in determine_visibility if
1874 DECL_VISIBILITY_SPECIFIED (olddecl) = 0;
1876 /* [temp.expl.spec/14] We don't inline explicit specialization
1877 just because the primary template says so. */
1881 if (DECL_PENDING_INLINE_INFO (newdecl) == 0)
1882 DECL_PENDING_INLINE_INFO (newdecl) = DECL_PENDING_INLINE_INFO (olddecl);
1884 DECL_DECLARED_INLINE_P (newdecl) |= DECL_DECLARED_INLINE_P (olddecl);
1886 /* If either decl says `inline', this fn is inline, unless
1887 its definition was passed already. */
1888 if (DECL_INLINE (newdecl) && DECL_INITIAL (olddecl) == NULL_TREE)
1889 DECL_INLINE (olddecl) = 1;
1890 DECL_INLINE (newdecl) = DECL_INLINE (olddecl);
1892 DECL_UNINLINABLE (newdecl) = DECL_UNINLINABLE (olddecl)
1893 = (DECL_UNINLINABLE (newdecl) || DECL_UNINLINABLE (olddecl));
1896 /* Preserve abstractness on cloned [cd]tors. */
1897 DECL_ABSTRACT (newdecl) = DECL_ABSTRACT (olddecl);
1901 SET_DECL_LANGUAGE (olddecl, DECL_LANGUAGE (newdecl));
1902 COPY_DECL_ASSEMBLER_NAME (newdecl, olddecl);
1903 COPY_DECL_RTL (newdecl, olddecl);
1905 if (! types_match || new_defines_function)
1907 /* These need to be copied so that the names are available.
1908 Note that if the types do match, we'll preserve inline
1909 info and other bits, but if not, we won't. */
1910 DECL_ARGUMENTS (olddecl) = DECL_ARGUMENTS (newdecl);
1911 DECL_RESULT (olddecl) = DECL_RESULT (newdecl);
1913 if (new_defines_function)
1914 /* If defining a function declared with other language
1915 linkage, use the previously declared language linkage. */
1916 SET_DECL_LANGUAGE (newdecl, DECL_LANGUAGE (olddecl));
1917 else if (types_match)
1919 /* If redeclaring a builtin function, and not a definition,
1920 it stays built in. */
1921 if (DECL_BUILT_IN (olddecl))
1923 DECL_BUILT_IN_CLASS (newdecl) = DECL_BUILT_IN_CLASS (olddecl);
1924 DECL_FUNCTION_CODE (newdecl) = DECL_FUNCTION_CODE (olddecl);
1925 /* If we're keeping the built-in definition, keep the rtl,
1926 regardless of declaration matches. */
1927 COPY_DECL_RTL (olddecl, newdecl);
1930 DECL_RESULT (newdecl) = DECL_RESULT (olddecl);
1931 /* Don't clear out the arguments if we're redefining a function. */
1932 if (DECL_ARGUMENTS (olddecl))
1933 DECL_ARGUMENTS (newdecl) = DECL_ARGUMENTS (olddecl);
1936 else if (TREE_CODE (newdecl) == NAMESPACE_DECL)
1937 NAMESPACE_LEVEL (newdecl) = NAMESPACE_LEVEL (olddecl);
1939 /* Now preserve various other info from the definition. */
1940 TREE_ADDRESSABLE (newdecl) = TREE_ADDRESSABLE (olddecl);
1941 TREE_ASM_WRITTEN (newdecl) = TREE_ASM_WRITTEN (olddecl);
1942 DECL_COMMON (newdecl) = DECL_COMMON (olddecl);
1943 COPY_DECL_ASSEMBLER_NAME (olddecl, newdecl);
1945 /* Warn about conflicting visibility specifications. */
1946 if (DECL_VISIBILITY_SPECIFIED (olddecl)
1947 && DECL_VISIBILITY_SPECIFIED (newdecl)
1948 && DECL_VISIBILITY (newdecl) != DECL_VISIBILITY (olddecl))
1950 warning (OPT_Wattributes, "%q+D: visibility attribute ignored "
1951 "because it", newdecl);
1952 warning (OPT_Wattributes, "%Jconflicts with previous "
1953 "declaration here", olddecl);
1955 /* Choose the declaration which specified visibility. */
1956 if (DECL_VISIBILITY_SPECIFIED (olddecl))
1958 DECL_VISIBILITY (newdecl) = DECL_VISIBILITY (olddecl);
1959 DECL_VISIBILITY_SPECIFIED (newdecl) = 1;
1961 /* Init priority used to be merged from newdecl to olddecl by the memcpy,
1962 so keep this behavior. */
1963 if (TREE_CODE (newdecl) == VAR_DECL && DECL_HAS_INIT_PRIORITY_P (newdecl))
1965 SET_DECL_INIT_PRIORITY (olddecl, DECL_INIT_PRIORITY (newdecl));
1966 DECL_HAS_INIT_PRIORITY_P (olddecl) = 1;
1969 /* The DECL_LANG_SPECIFIC information in OLDDECL will be replaced
1970 with that from NEWDECL below. */
1971 if (DECL_LANG_SPECIFIC (olddecl))
1973 gcc_assert (DECL_LANG_SPECIFIC (olddecl)
1974 != DECL_LANG_SPECIFIC (newdecl));
1975 ggc_free (DECL_LANG_SPECIFIC (olddecl));
1978 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1982 function_size = sizeof (struct tree_decl_common);
1984 memcpy ((char *) olddecl + sizeof (struct tree_common),
1985 (char *) newdecl + sizeof (struct tree_common),
1986 function_size - sizeof (struct tree_common));
1988 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
1989 (char *) newdecl + sizeof (struct tree_decl_common),
1990 sizeof (struct tree_function_decl) - sizeof (struct tree_decl_common));
1992 /* If newdecl is a template instantiation, it is possible that
1993 the following sequence of events has occurred:
1995 o A friend function was declared in a class template. The
1996 class template was instantiated.
1998 o The instantiation of the friend declaration was
1999 recorded on the instantiation list, and is newdecl.
2001 o Later, however, instantiate_class_template called pushdecl
2002 on the newdecl to perform name injection. But, pushdecl in
2003 turn called duplicate_decls when it discovered that another
2004 declaration of a global function with the same name already
2007 o Here, in duplicate_decls, we decided to clobber newdecl.
2009 If we're going to do that, we'd better make sure that
2010 olddecl, and not newdecl, is on the list of
2011 instantiations so that if we try to do the instantiation
2012 again we won't get the clobbered declaration. */
2013 reregister_specialization (newdecl,
2019 size_t size = tree_code_size (TREE_CODE (olddecl));
2020 memcpy ((char *) olddecl + sizeof (struct tree_common),
2021 (char *) newdecl + sizeof (struct tree_common),
2022 sizeof (struct tree_decl_common) - sizeof (struct tree_common));
2023 switch (TREE_CODE (olddecl))
2033 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
2034 (char *) newdecl + sizeof (struct tree_decl_common),
2035 size - sizeof (struct tree_decl_common)
2036 + TREE_CODE_LENGTH (TREE_CODE (newdecl)) * sizeof (char *));
2040 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
2041 (char *) newdecl + sizeof (struct tree_decl_common),
2042 sizeof (struct tree_decl_non_common) - sizeof (struct tree_decl_common)
2043 + TREE_CODE_LENGTH (TREE_CODE (newdecl)) * sizeof (char *));
2047 DECL_UID (olddecl) = olddecl_uid;
2049 DECL_FRIEND_P (olddecl) = 1;
2052 DECL_ANTICIPATED (olddecl) = 1;
2053 DECL_HIDDEN_FRIEND_P (olddecl) = 1;
2056 /* NEWDECL contains the merged attribute lists.
2057 Update OLDDECL to be the same. */
2058 DECL_ATTRIBUTES (olddecl) = DECL_ATTRIBUTES (newdecl);
2060 /* If OLDDECL had its DECL_RTL instantiated, re-invoke make_decl_rtl
2061 so that encode_section_info has a chance to look at the new decl
2062 flags and attributes. */
2063 if (DECL_RTL_SET_P (olddecl)
2064 && (TREE_CODE (olddecl) == FUNCTION_DECL
2065 || (TREE_CODE (olddecl) == VAR_DECL
2066 && TREE_STATIC (olddecl))))
2067 make_decl_rtl (olddecl);
2069 /* The NEWDECL will no longer be needed. Because every out-of-class
2070 declaration of a member results in a call to duplicate_decls,
2071 freeing these nodes represents in a significant savings. */
2077 /* Return zero if the declaration NEWDECL is valid
2078 when the declaration OLDDECL (assumed to be for the same name)
2079 has already been seen.
2080 Otherwise return an error message format string with a %s
2081 where the identifier should go. */
2084 redeclaration_error_message (tree newdecl, tree olddecl)
2086 if (TREE_CODE (newdecl) == TYPE_DECL)
2088 /* Because C++ can put things into name space for free,
2089 constructs like "typedef struct foo { ... } foo"
2090 would look like an erroneous redeclaration. */
2091 if (same_type_p (TREE_TYPE (newdecl), TREE_TYPE (olddecl)))
2094 return "redefinition of %q#D";
2096 else if (TREE_CODE (newdecl) == FUNCTION_DECL)
2098 /* If this is a pure function, its olddecl will actually be
2099 the original initialization to `0' (which we force to call
2100 abort()). Don't complain about redefinition in this case. */
2101 if (DECL_LANG_SPECIFIC (olddecl) && DECL_PURE_VIRTUAL_P (olddecl)
2102 && DECL_INITIAL (olddecl) == NULL_TREE)
2105 /* If both functions come from different namespaces, this is not
2106 a redeclaration - this is a conflict with a used function. */
2107 if (DECL_NAMESPACE_SCOPE_P (olddecl)
2108 && DECL_CONTEXT (olddecl) != DECL_CONTEXT (newdecl)
2109 && ! decls_match (olddecl, newdecl))
2110 return "%qD conflicts with used function";
2112 /* We'll complain about linkage mismatches in
2113 warn_extern_redeclared_static. */
2115 /* Defining the same name twice is no good. */
2116 if (DECL_INITIAL (olddecl) != NULL_TREE
2117 && DECL_INITIAL (newdecl) != NULL_TREE)
2119 if (DECL_NAME (olddecl) == NULL_TREE)
2120 return "%q#D not declared in class";
2122 return "redefinition of %q#D";
2126 else if (TREE_CODE (newdecl) == TEMPLATE_DECL)
2130 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
2132 if (COMPLETE_TYPE_P (TREE_TYPE (newdecl))
2133 && COMPLETE_TYPE_P (TREE_TYPE (olddecl)))
2134 return "redefinition of %q#D";
2138 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) != FUNCTION_DECL
2139 || (DECL_TEMPLATE_RESULT (newdecl)
2140 == DECL_TEMPLATE_RESULT (olddecl)))
2143 nt = DECL_TEMPLATE_RESULT (newdecl);
2144 if (DECL_TEMPLATE_INFO (nt))
2145 nt = DECL_TEMPLATE_RESULT (template_for_substitution (nt));
2146 ot = DECL_TEMPLATE_RESULT (olddecl);
2147 if (DECL_TEMPLATE_INFO (ot))
2148 ot = DECL_TEMPLATE_RESULT (template_for_substitution (ot));
2149 if (DECL_INITIAL (nt) && DECL_INITIAL (ot))
2150 return "redefinition of %q#D";
2152 /* Core issue #226 (C++0x):
2154 If a friend function template declaration specifies a
2155 default template-argument, that declaration shall be a
2156 definition and shall be the only declaration of the
2157 function template in the translation unit. */
2159 && TREE_CODE (ot) == FUNCTION_DECL && DECL_FRIEND_P (ot)
2160 && !check_default_tmpl_args (nt, DECL_TEMPLATE_PARMS (newdecl),
2161 /*is_primary=*/1, /*is_partial=*/0,
2162 /*is_friend_decl=*/2))
2163 return "redeclaration of friend %q#D may not have default template arguments";
2167 else if (TREE_CODE (newdecl) == VAR_DECL
2168 && DECL_THREAD_LOCAL_P (newdecl) != DECL_THREAD_LOCAL_P (olddecl)
2169 && (! DECL_LANG_SPECIFIC (olddecl)
2170 || ! CP_DECL_THREADPRIVATE_P (olddecl)
2171 || DECL_THREAD_LOCAL_P (newdecl)))
2173 /* Only variables can be thread-local, and all declarations must
2174 agree on this property. */
2175 if (DECL_THREAD_LOCAL_P (newdecl))
2176 return "thread-local declaration of %q#D follows "
2177 "non-thread-local declaration";
2179 return "non-thread-local declaration of %q#D follows "
2180 "thread-local declaration";
2182 else if (toplevel_bindings_p () || DECL_NAMESPACE_SCOPE_P (newdecl))
2184 /* Objects declared at top level: */
2185 /* If at least one is a reference, it's ok. */
2186 if (DECL_EXTERNAL (newdecl) || DECL_EXTERNAL (olddecl))
2188 /* Reject two definitions. */
2189 return "redefinition of %q#D";
2193 /* Objects declared with block scope: */
2194 /* Reject two definitions, and reject a definition
2195 together with an external reference. */
2196 if (!(DECL_EXTERNAL (newdecl) && DECL_EXTERNAL (olddecl)))
2197 return "redeclaration of %q#D";
2202 /* Hash and equality functions for the named_label table. */
2205 named_label_entry_hash (const void *data)
2207 const struct named_label_entry *ent = (const struct named_label_entry *) data;
2208 return DECL_UID (ent->label_decl);
2212 named_label_entry_eq (const void *a, const void *b)
2214 const struct named_label_entry *ent_a = (const struct named_label_entry *) a;
2215 const struct named_label_entry *ent_b = (const struct named_label_entry *) b;
2216 return ent_a->label_decl == ent_b->label_decl;
2219 /* Create a new label, named ID. */
2222 make_label_decl (tree id, int local_p)
2224 struct named_label_entry *ent;
2228 decl = build_decl (LABEL_DECL, id, void_type_node);
2230 DECL_CONTEXT (decl) = current_function_decl;
2231 DECL_MODE (decl) = VOIDmode;
2232 C_DECLARED_LABEL_FLAG (decl) = local_p;
2234 /* Say where one reference is to the label, for the sake of the
2235 error if it is not defined. */
2236 DECL_SOURCE_LOCATION (decl) = input_location;
2238 /* Record the fact that this identifier is bound to this label. */
2239 SET_IDENTIFIER_LABEL_VALUE (id, decl);
2241 /* Create the label htab for the function on demand. */
2243 named_labels = htab_create_ggc (13, named_label_entry_hash,
2244 named_label_entry_eq, NULL);
2246 /* Record this label on the list of labels used in this function.
2247 We do this before calling make_label_decl so that we get the
2248 IDENTIFIER_LABEL_VALUE before the new label is declared. */
2249 ent = GGC_CNEW (struct named_label_entry);
2250 ent->label_decl = decl;
2252 slot = htab_find_slot (named_labels, ent, INSERT);
2253 gcc_assert (*slot == NULL);
2259 /* Look for a label named ID in the current function. If one cannot
2260 be found, create one. (We keep track of used, but undefined,
2261 labels, and complain about them at the end of a function.) */
2264 lookup_label (tree id)
2268 timevar_push (TV_NAME_LOOKUP);
2269 /* You can't use labels at global scope. */
2270 if (current_function_decl == NULL_TREE)
2272 error ("label %qE referenced outside of any function", id);
2273 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, NULL_TREE);
2276 /* See if we've already got this label. */
2277 decl = IDENTIFIER_LABEL_VALUE (id);
2278 if (decl != NULL_TREE && DECL_CONTEXT (decl) == current_function_decl)
2279 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2281 decl = make_label_decl (id, /*local_p=*/0);
2282 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2285 /* Declare a local label named ID. */
2288 declare_local_label (tree id)
2292 /* Add a new entry to the SHADOWED_LABELS list so that when we leave
2293 this scope we can restore the old value of IDENTIFIER_TYPE_VALUE. */
2294 shadow = tree_cons (IDENTIFIER_LABEL_VALUE (id), NULL_TREE,
2295 current_binding_level->shadowed_labels);
2296 current_binding_level->shadowed_labels = shadow;
2298 decl = make_label_decl (id, /*local_p=*/1);
2299 TREE_VALUE (shadow) = decl;
2304 /* Returns nonzero if it is ill-formed to jump past the declaration of
2305 DECL. Returns 2 if it's also a real problem. */
2308 decl_jump_unsafe (tree decl)
2310 if (TREE_CODE (decl) != VAR_DECL || TREE_STATIC (decl)
2311 || TREE_TYPE (decl) == error_mark_node)
2314 if (TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl))
2315 || DECL_NONTRIVIALLY_INITIALIZED_P (decl))
2318 if (pod_type_p (TREE_TYPE (decl)))
2321 /* The POD stuff is just pedantry; why should it matter if the class
2322 contains a field of pointer to member type? */
2326 /* A subroutine of check_previous_goto_1 to identify a branch to the user. */
2329 identify_goto (tree decl, const location_t *locus)
2332 pedwarn ("jump to label %qD", decl);
2334 pedwarn ("jump to case label");
2336 pedwarn ("%H from here", locus);
2339 /* Check that a single previously seen jump to a newly defined label
2340 is OK. DECL is the LABEL_DECL or 0; LEVEL is the binding_level for
2341 the jump context; NAMES are the names in scope in LEVEL at the jump
2342 context; LOCUS is the source position of the jump or 0. Returns
2343 true if all is well. */
2346 check_previous_goto_1 (tree decl, struct cp_binding_level* level, tree names,
2347 bool exited_omp, const location_t *locus)
2349 struct cp_binding_level *b;
2350 bool identified = false, saw_eh = false, saw_omp = false;
2354 identify_goto (decl, locus);
2355 error (" exits OpenMP structured block");
2356 identified = saw_omp = true;
2359 for (b = current_binding_level; b ; b = b->level_chain)
2361 tree new_decls, old_decls = (b == level ? names : NULL_TREE);
2363 for (new_decls = b->names; new_decls != old_decls;
2364 new_decls = TREE_CHAIN (new_decls))
2366 int problem = decl_jump_unsafe (new_decls);
2372 identify_goto (decl, locus);
2376 error (" crosses initialization of %q+#D", new_decls);
2378 pedwarn (" enters scope of non-POD %q+#D", new_decls);
2383 if ((b->kind == sk_try || b->kind == sk_catch) && !saw_eh)
2387 identify_goto (decl, locus);
2390 if (b->kind == sk_try)
2391 error (" enters try block");
2393 error (" enters catch block");
2396 if (b->kind == sk_omp && !saw_omp)
2400 identify_goto (decl, locus);
2403 error (" enters OpenMP structured block");
2412 check_previous_goto (tree decl, struct named_label_use_entry *use)
2414 check_previous_goto_1 (decl, use->binding_level,
2415 use->names_in_scope, use->in_omp_scope,
2416 &use->o_goto_locus);
2420 check_switch_goto (struct cp_binding_level* level)
2422 return check_previous_goto_1 (NULL_TREE, level, level->names, false, NULL);
2425 /* Check that a new jump to a label DECL is OK. Called by
2426 finish_goto_stmt. */
2429 check_goto (tree decl)
2431 struct named_label_entry *ent, dummy;
2432 bool saw_catch = false, identified = false;
2435 /* We can't know where a computed goto is jumping.
2436 So we assume that it's OK. */
2437 if (TREE_CODE (decl) != LABEL_DECL)
2440 /* We didn't record any information about this label when we created it,
2441 and there's not much point since it's trivial to analyze as a return. */
2442 if (decl == cdtor_label)
2445 dummy.label_decl = decl;
2446 ent = (struct named_label_entry *) htab_find (named_labels, &dummy);
2447 gcc_assert (ent != NULL);
2449 /* If the label hasn't been defined yet, defer checking. */
2450 if (! DECL_INITIAL (decl))
2452 struct named_label_use_entry *new_use;
2454 /* Don't bother creating another use if the last goto had the
2455 same data, and will therefore create the same set of errors. */
2457 && ent->uses->names_in_scope == current_binding_level->names)
2460 new_use = GGC_NEW (struct named_label_use_entry);
2461 new_use->binding_level = current_binding_level;
2462 new_use->names_in_scope = current_binding_level->names;
2463 new_use->o_goto_locus = input_location;
2464 new_use->in_omp_scope = false;
2466 new_use->next = ent->uses;
2467 ent->uses = new_use;
2471 if (ent->in_try_scope || ent->in_catch_scope
2472 || ent->in_omp_scope || ent->bad_decls)
2474 pedwarn ("jump to label %q+D", decl);
2475 pedwarn (" from here");
2479 for (bad = ent->bad_decls; bad; bad = TREE_CHAIN (bad))
2481 tree b = TREE_VALUE (bad);
2482 int u = decl_jump_unsafe (b);
2484 if (u > 1 && DECL_ARTIFICIAL (b))
2486 /* Can't skip init of __exception_info. */
2487 error ("%J enters catch block", b);
2491 error (" skips initialization of %q+#D", b);
2493 pedwarn (" enters scope of non-POD %q+#D", b);
2496 if (ent->in_try_scope)
2497 error (" enters try block");
2498 else if (ent->in_catch_scope && !saw_catch)
2499 error (" enters catch block");
2501 if (ent->in_omp_scope)
2502 error (" enters OpenMP structured block");
2503 else if (flag_openmp)
2505 struct cp_binding_level *b;
2506 for (b = current_binding_level; b ; b = b->level_chain)
2508 if (b == ent->binding_level)
2510 if (b->kind == sk_omp)
2514 pedwarn ("jump to label %q+D", decl);
2515 pedwarn (" from here");
2518 error (" exits OpenMP structured block");
2525 /* Check that a return is ok wrt OpenMP structured blocks.
2526 Called by finish_return_stmt. Returns true if all is well. */
2529 check_omp_return (void)
2531 struct cp_binding_level *b;
2532 for (b = current_binding_level; b ; b = b->level_chain)
2533 if (b->kind == sk_omp)
2535 error ("invalid exit from OpenMP structured block");
2541 /* Define a label, specifying the location in the source file.
2542 Return the LABEL_DECL node for the label. */
2545 define_label (location_t location, tree name)
2547 struct named_label_entry *ent, dummy;
2548 struct cp_binding_level *p;
2551 timevar_push (TV_NAME_LOOKUP);
2553 decl = lookup_label (name);
2555 dummy.label_decl = decl;
2556 ent = (struct named_label_entry *) htab_find (named_labels, &dummy);
2557 gcc_assert (ent != NULL);
2559 /* After labels, make any new cleanups in the function go into their
2560 own new (temporary) binding contour. */
2561 for (p = current_binding_level;
2562 p->kind != sk_function_parms;
2564 p->more_cleanups_ok = 0;
2566 if (name == get_identifier ("wchar_t"))
2567 pedwarn ("label named wchar_t");
2569 if (DECL_INITIAL (decl) != NULL_TREE)
2571 error ("duplicate label %qD", decl);
2572 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
2576 struct named_label_use_entry *use;
2578 /* Mark label as having been defined. */
2579 DECL_INITIAL (decl) = error_mark_node;
2580 /* Say where in the source. */
2581 DECL_SOURCE_LOCATION (decl) = location;
2583 ent->binding_level = current_binding_level;
2584 ent->names_in_scope = current_binding_level->names;
2586 for (use = ent->uses; use ; use = use->next)
2587 check_previous_goto (decl, use);
2591 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2596 struct cp_binding_level *level;
2597 struct cp_switch *next;
2598 /* The SWITCH_STMT being built. */
2600 /* A splay-tree mapping the low element of a case range to the high
2601 element, or NULL_TREE if there is no high element. Used to
2602 determine whether or not a new case label duplicates an old case
2603 label. We need a tree, rather than simply a hash table, because
2604 of the GNU case range extension. */
2608 /* A stack of the currently active switch statements. The innermost
2609 switch statement is on the top of the stack. There is no need to
2610 mark the stack for garbage collection because it is only active
2611 during the processing of the body of a function, and we never
2612 collect at that point. */
2614 static struct cp_switch *switch_stack;
2616 /* Called right after a switch-statement condition is parsed.
2617 SWITCH_STMT is the switch statement being parsed. */
2620 push_switch (tree switch_stmt)
2622 struct cp_switch *p = XNEW (struct cp_switch);
2623 p->level = current_binding_level;
2624 p->next = switch_stack;
2625 p->switch_stmt = switch_stmt;
2626 p->cases = splay_tree_new (case_compare, NULL, NULL);
2633 struct cp_switch *cs = switch_stack;
2634 location_t switch_location;
2636 /* Emit warnings as needed. */
2637 if (EXPR_HAS_LOCATION (cs->switch_stmt))
2638 switch_location = EXPR_LOCATION (cs->switch_stmt);
2640 switch_location = input_location;
2641 if (!processing_template_decl)
2642 c_do_switch_warnings (cs->cases, switch_location,
2643 SWITCH_STMT_TYPE (cs->switch_stmt),
2644 SWITCH_STMT_COND (cs->switch_stmt));
2646 splay_tree_delete (cs->cases);
2647 switch_stack = switch_stack->next;
2651 /* Note that we've seen a definition of a case label, and complain if this
2652 is a bad place for one. */
2655 finish_case_label (tree low_value, tree high_value)
2658 struct cp_binding_level *p;
2660 if (processing_template_decl)
2664 /* For templates, just add the case label; we'll do semantic
2665 analysis at instantiation-time. */
2666 label = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
2667 return add_stmt (build_case_label (low_value, high_value, label));
2670 /* Find the condition on which this switch statement depends. */
2671 cond = SWITCH_STMT_COND (switch_stack->switch_stmt);
2672 if (cond && TREE_CODE (cond) == TREE_LIST)
2673 cond = TREE_VALUE (cond);
2675 if (!check_switch_goto (switch_stack->level))
2676 return error_mark_node;
2678 r = c_add_case_label (switch_stack->cases, cond, TREE_TYPE (cond),
2679 low_value, high_value);
2681 /* After labels, make any new cleanups in the function go into their
2682 own new (temporary) binding contour. */
2683 for (p = current_binding_level;
2684 p->kind != sk_function_parms;
2686 p->more_cleanups_ok = 0;
2691 /* Hash a TYPENAME_TYPE. K is really of type `tree'. */
2694 typename_hash (const void* k)
2699 hash = (htab_hash_pointer (TYPE_CONTEXT (t))
2700 ^ htab_hash_pointer (DECL_NAME (TYPE_NAME (t))));
2705 typedef struct typename_info {
2713 /* Compare two TYPENAME_TYPEs. K1 is really of type `tree', K2 is
2714 really of type `typename_info*' */
2717 typename_compare (const void * k1, const void * k2)
2720 const typename_info *t2;
2723 t2 = (const typename_info *) k2;
2725 return (DECL_NAME (TYPE_NAME (t1)) == t2->name
2726 && TYPE_CONTEXT (t1) == t2->scope
2727 && TYPENAME_TYPE_FULLNAME (t1) == t2->template_id
2728 && TYPENAME_IS_ENUM_P (t1) == t2->enum_p
2729 && TYPENAME_IS_CLASS_P (t1) == t2->class_p);
2732 /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
2733 the type of `T', NAME is the IDENTIFIER_NODE for `t'.
2735 Returns the new TYPENAME_TYPE. */
2737 static GTY ((param_is (union tree_node))) htab_t typename_htab;
2740 build_typename_type (tree context, tree name, tree fullname,
2741 enum tag_types tag_type)
2749 if (typename_htab == NULL)
2750 typename_htab = htab_create_ggc (61, &typename_hash,
2751 &typename_compare, NULL);
2753 ti.scope = FROB_CONTEXT (context);
2755 ti.template_id = fullname;
2756 ti.enum_p = tag_type == enum_type;
2757 ti.class_p = (tag_type == class_type
2758 || tag_type == record_type
2759 || tag_type == union_type);
2760 hash = (htab_hash_pointer (ti.scope)
2761 ^ htab_hash_pointer (ti.name));
2763 /* See if we already have this type. */
2764 e = htab_find_slot_with_hash (typename_htab, &ti, hash, INSERT);
2769 /* Build the TYPENAME_TYPE. */
2770 t = make_aggr_type (TYPENAME_TYPE);
2771 TYPE_CONTEXT (t) = ti.scope;
2772 TYPENAME_TYPE_FULLNAME (t) = ti.template_id;
2773 TYPENAME_IS_ENUM_P (t) = ti.enum_p;
2774 TYPENAME_IS_CLASS_P (t) = ti.class_p;
2776 /* Build the corresponding TYPE_DECL. */
2777 d = build_decl (TYPE_DECL, name, t);
2778 TYPE_NAME (TREE_TYPE (d)) = d;
2779 TYPE_STUB_DECL (TREE_TYPE (d)) = d;
2780 DECL_CONTEXT (d) = FROB_CONTEXT (context);
2781 DECL_ARTIFICIAL (d) = 1;
2783 /* Store it in the hash table. */
2786 /* TYPENAME_TYPEs must always be compared structurally, because
2787 they may or may not resolve down to another type depending on
2788 the currently open classes. */
2789 SET_TYPE_STRUCTURAL_EQUALITY (t);
2795 /* Resolve `typename CONTEXT::NAME'. TAG_TYPE indicates the tag
2796 provided to name the type. Returns an appropriate type, unless an
2797 error occurs, in which case error_mark_node is returned. If we
2798 locate a non-artificial TYPE_DECL and TF_KEEP_TYPE_DECL is set, we
2799 return that, rather than the _TYPE it corresponds to, in other
2800 cases we look through the type decl. If TF_ERROR is set, complain
2801 about errors, otherwise be quiet. */
2804 make_typename_type (tree context, tree name, enum tag_types tag_type,
2805 tsubst_flags_t complain)
2811 if (name == error_mark_node
2812 || context == NULL_TREE
2813 || context == error_mark_node)
2814 return error_mark_node;
2818 if (!(TYPE_LANG_SPECIFIC (name)
2819 && (CLASSTYPE_IS_TEMPLATE (name)
2820 || CLASSTYPE_USE_TEMPLATE (name))))
2821 name = TYPE_IDENTIFIER (name);
2823 /* Create a TEMPLATE_ID_EXPR for the type. */
2824 name = build_nt (TEMPLATE_ID_EXPR,
2825 CLASSTYPE_TI_TEMPLATE (name),
2826 CLASSTYPE_TI_ARGS (name));
2828 else if (TREE_CODE (name) == TYPE_DECL)
2829 name = DECL_NAME (name);
2833 if (TREE_CODE (name) == TEMPLATE_ID_EXPR)
2835 name = TREE_OPERAND (name, 0);
2836 if (TREE_CODE (name) == TEMPLATE_DECL)
2837 name = TREE_OPERAND (fullname, 0) = DECL_NAME (name);
2838 else if (TREE_CODE (name) == OVERLOAD)
2840 error ("%qD is not a type", name);
2841 return error_mark_node;
2844 if (TREE_CODE (name) == TEMPLATE_DECL)
2846 error ("%qD used without template parameters", name);
2847 return error_mark_node;
2849 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
2850 gcc_assert (TYPE_P (context));
2852 /* When the CONTEXT is a dependent type, NAME could refer to a
2853 dependent base class of CONTEXT. So we cannot peek inside it,
2854 even if CONTEXT is a currently open scope. */
2855 if (dependent_type_p (context))
2856 return build_typename_type (context, name, fullname, tag_type);
2858 if (!IS_AGGR_TYPE (context))
2860 if (complain & tf_error)
2861 error ("%q#T is not a class", context);
2862 return error_mark_node;
2865 want_template = TREE_CODE (fullname) == TEMPLATE_ID_EXPR;
2867 /* We should only set WANT_TYPE when we're a nested typename type.
2868 Then we can give better diagnostics if we find a non-type. */
2869 t = lookup_field (context, name, 0, /*want_type=*/true);
2872 if (complain & tf_error)
2873 error (want_template ? "no class template named %q#T in %q#T"
2874 : "no type named %q#T in %q#T", name, context);
2875 return error_mark_node;
2878 if (want_template && !DECL_CLASS_TEMPLATE_P (t))
2880 if (complain & tf_error)
2881 error ("%<typename %T::%D%> names %q#T, which is not a class template",
2883 return error_mark_node;
2885 if (!want_template && TREE_CODE (t) != TYPE_DECL)
2887 if (complain & tf_error)
2888 error ("%<typename %T::%D%> names %q#T, which is not a type",
2890 return error_mark_node;
2893 if (complain & tf_error)
2894 perform_or_defer_access_check (TYPE_BINFO (context), t, t);
2897 return lookup_template_class (t, TREE_OPERAND (fullname, 1),
2899 /*entering_scope=*/0,
2900 tf_warning_or_error | tf_user);
2902 if (DECL_ARTIFICIAL (t) || !(complain & tf_keep_type_decl))
2908 /* Resolve `CONTEXT::template NAME'. Returns a TEMPLATE_DECL if the name
2909 can be resolved or an UNBOUND_CLASS_TEMPLATE, unless an error occurs,
2910 in which case error_mark_node is returned.
2912 If PARM_LIST is non-NULL, also make sure that the template parameter
2913 list of TEMPLATE_DECL matches.
2915 If COMPLAIN zero, don't complain about any errors that occur. */
2918 make_unbound_class_template (tree context, tree name, tree parm_list,
2919 tsubst_flags_t complain)
2925 name = TYPE_IDENTIFIER (name);
2926 else if (DECL_P (name))
2927 name = DECL_NAME (name);
2928 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
2930 if (!dependent_type_p (context)
2931 || currently_open_class (context))
2933 tree tmpl = NULL_TREE;
2935 if (IS_AGGR_TYPE (context))
2936 tmpl = lookup_field (context, name, 0, false);
2938 if (!tmpl || !DECL_CLASS_TEMPLATE_P (tmpl))
2940 if (complain & tf_error)
2941 error ("no class template named %q#T in %q#T", name, context);
2942 return error_mark_node;
2946 && !comp_template_parms (DECL_TEMPLATE_PARMS (tmpl), parm_list))
2948 if (complain & tf_error)
2950 error ("template parameters do not match template");
2951 error ("%q+D declared here", tmpl);
2953 return error_mark_node;
2956 if (complain & tf_error)
2957 perform_or_defer_access_check (TYPE_BINFO (context), tmpl, tmpl);
2962 /* Build the UNBOUND_CLASS_TEMPLATE. */
2963 t = make_aggr_type (UNBOUND_CLASS_TEMPLATE);
2964 TYPE_CONTEXT (t) = FROB_CONTEXT (context);
2965 TREE_TYPE (t) = NULL_TREE;
2966 SET_TYPE_STRUCTURAL_EQUALITY (t);
2968 /* Build the corresponding TEMPLATE_DECL. */
2969 d = build_decl (TEMPLATE_DECL, name, t);
2970 TYPE_NAME (TREE_TYPE (d)) = d;
2971 TYPE_STUB_DECL (TREE_TYPE (d)) = d;
2972 DECL_CONTEXT (d) = FROB_CONTEXT (context);
2973 DECL_ARTIFICIAL (d) = 1;
2974 DECL_TEMPLATE_PARMS (d) = parm_list;
2981 /* Push the declarations of builtin types into the namespace.
2982 RID_INDEX is the index of the builtin type in the array
2983 RID_POINTERS. NAME is the name used when looking up the builtin
2984 type. TYPE is the _TYPE node for the builtin type. */
2987 record_builtin_type (enum rid rid_index,
2991 tree rname = NULL_TREE, tname = NULL_TREE;
2992 tree tdecl = NULL_TREE;
2994 if ((int) rid_index < (int) RID_MAX)
2995 rname = ridpointers[(int) rid_index];
2997 tname = get_identifier (name);
2999 /* The calls to SET_IDENTIFIER_GLOBAL_VALUE below should be
3000 eliminated. Built-in types should not be looked up name; their
3001 names are keywords that the parser can recognize. However, there
3002 is code in c-common.c that uses identifier_global_value to look
3003 up built-in types by name. */
3006 tdecl = build_decl (TYPE_DECL, tname, type);
3007 DECL_ARTIFICIAL (tdecl) = 1;
3008 SET_IDENTIFIER_GLOBAL_VALUE (tname, tdecl);
3014 tdecl = build_decl (TYPE_DECL, rname, type);
3015 DECL_ARTIFICIAL (tdecl) = 1;
3017 SET_IDENTIFIER_GLOBAL_VALUE (rname, tdecl);
3020 if (!TYPE_NAME (type))
3021 TYPE_NAME (type) = tdecl;
3024 debug_hooks->type_decl (tdecl, 0);
3027 /* Record one of the standard Java types.
3028 * Declare it as having the given NAME.
3029 * If SIZE > 0, it is the size of one of the integral types;
3030 * otherwise it is the negative of the size of one of the other types. */
3033 record_builtin_java_type (const char* name, int size)
3037 type = make_signed_type (size);
3038 else if (size > -32)
3039 { /* "__java_char" or ""__java_boolean". */
3040 type = make_unsigned_type (-size);
3041 /*if (size == -1) TREE_SET_CODE (type, BOOLEAN_TYPE);*/
3044 { /* "__java_float" or ""__java_double". */
3045 type = make_node (REAL_TYPE);
3046 TYPE_PRECISION (type) = - size;
3049 record_builtin_type (RID_MAX, name, type);
3050 decl = TYPE_NAME (type);
3052 /* Suppress generate debug symbol entries for these types,
3053 since for normal C++ they are just clutter.
3054 However, push_lang_context undoes this if extern "Java" is seen. */
3055 DECL_IGNORED_P (decl) = 1;
3057 TYPE_FOR_JAVA (type) = 1;
3061 /* Push a type into the namespace so that the back ends ignore it. */
3064 record_unknown_type (tree type, const char* name)
3066 tree decl = pushdecl (build_decl (TYPE_DECL, get_identifier (name), type));
3067 /* Make sure the "unknown type" typedecl gets ignored for debug info. */
3068 DECL_IGNORED_P (decl) = 1;
3069 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
3070 TYPE_SIZE (type) = TYPE_SIZE (void_type_node);
3071 TYPE_ALIGN (type) = 1;
3072 TYPE_USER_ALIGN (type) = 0;
3073 TYPE_MODE (type) = TYPE_MODE (void_type_node);
3076 /* A string for which we should create an IDENTIFIER_NODE at
3079 typedef struct predefined_identifier
3081 /* The name of the identifier. */
3082 const char *const name;
3083 /* The place where the IDENTIFIER_NODE should be stored. */
3085 /* Nonzero if this is the name of a constructor or destructor. */
3086 const int ctor_or_dtor_p;
3087 } predefined_identifier;
3089 /* Create all the predefined identifiers. */
3092 initialize_predefined_identifiers (void)
3094 const predefined_identifier *pid;
3096 /* A table of identifiers to create at startup. */
3097 static const predefined_identifier predefined_identifiers[] = {
3098 { "C++", &lang_name_cplusplus, 0 },
3099 { "C", &lang_name_c, 0 },
3100 { "Java", &lang_name_java, 0 },
3101 /* Some of these names have a trailing space so that it is
3102 impossible for them to conflict with names written by users. */
3103 { "__ct ", &ctor_identifier, 1 },
3104 { "__base_ctor ", &base_ctor_identifier, 1 },
3105 { "__comp_ctor ", &complete_ctor_identifier, 1 },
3106 { "__dt ", &dtor_identifier, 1 },
3107 { "__comp_dtor ", &complete_dtor_identifier, 1 },
3108 { "__base_dtor ", &base_dtor_identifier, 1 },
3109 { "__deleting_dtor ", &deleting_dtor_identifier, 1 },
3110 { IN_CHARGE_NAME, &in_charge_identifier, 0 },
3111 { "nelts", &nelts_identifier, 0 },
3112 { THIS_NAME, &this_identifier, 0 },
3113 { VTABLE_DELTA_NAME, &delta_identifier, 0 },
3114 { VTABLE_PFN_NAME, &pfn_identifier, 0 },
3115 { "_vptr", &vptr_identifier, 0 },
3116 { "__vtt_parm", &vtt_parm_identifier, 0 },
3117 { "::", &global_scope_name, 0 },
3118 { "std", &std_identifier, 0 },
3122 for (pid = predefined_identifiers; pid->name; ++pid)
3124 *pid->node = get_identifier (pid->name);
3125 if (pid->ctor_or_dtor_p)
3126 IDENTIFIER_CTOR_OR_DTOR_P (*pid->node) = 1;
3130 /* Create the predefined scalar types of C,
3131 and some nodes representing standard constants (0, 1, (void *)0).
3132 Initialize the global binding level.
3133 Make definitions for built-in primitive functions. */
3136 cxx_init_decl_processing (void)
3139 tree void_ftype_ptr;
3141 build_common_tree_nodes (flag_signed_char, false);
3143 /* Create all the identifiers we need. */
3144 initialize_predefined_identifiers ();
3146 /* Create the global variables. */
3147 push_to_top_level ();
3149 current_function_decl = NULL_TREE;
3150 current_binding_level = NULL;
3151 /* Enter the global namespace. */
3152 gcc_assert (global_namespace == NULL_TREE);
3153 global_namespace = build_lang_decl (NAMESPACE_DECL, global_scope_name,
3155 TREE_PUBLIC (global_namespace) = 1;
3156 begin_scope (sk_namespace, global_namespace);
3158 current_lang_name = NULL_TREE;
3160 /* Force minimum function alignment if using the least significant
3161 bit of function pointers to store the virtual bit. */
3162 if (TARGET_PTRMEMFUNC_VBIT_LOCATION == ptrmemfunc_vbit_in_pfn
3163 && force_align_functions_log < 1)
3164 force_align_functions_log = 1;
3167 current_lang_name = lang_name_c;
3169 /* Create the `std' namespace. */
3170 push_namespace (std_identifier);
3171 std_node = current_namespace;
3174 c_common_nodes_and_builtins ();
3176 java_byte_type_node = record_builtin_java_type ("__java_byte", 8);
3177 java_short_type_node = record_builtin_java_type ("__java_short", 16);
3178 java_int_type_node = record_builtin_java_type ("__java_int", 32);
3179 java_long_type_node = record_builtin_java_type ("__java_long", 64);
3180 java_float_type_node = record_builtin_java_type ("__java_float", -32);
3181 java_double_type_node = record_builtin_java_type ("__java_double", -64);
3182 java_char_type_node = record_builtin_java_type ("__java_char", -16);
3183 java_boolean_type_node = record_builtin_java_type ("__java_boolean", -1);
3185 integer_two_node = build_int_cst (NULL_TREE, 2);
3186 integer_three_node = build_int_cst (NULL_TREE, 3);
3188 record_builtin_type (RID_BOOL, "bool", boolean_type_node);
3189 truthvalue_type_node = boolean_type_node;
3190 truthvalue_false_node = boolean_false_node;
3191 truthvalue_true_node = boolean_true_node;
3193 empty_except_spec = build_tree_list (NULL_TREE, NULL_TREE);
3196 record_builtin_type (RID_MAX, NULL, string_type_node);
3199 delta_type_node = ptrdiff_type_node;
3200 vtable_index_type = ptrdiff_type_node;
3202 vtt_parm_type = build_pointer_type (const_ptr_type_node);
3203 void_ftype = build_function_type (void_type_node, void_list_node);
3204 void_ftype_ptr = build_function_type (void_type_node,
3205 tree_cons (NULL_TREE,
3209 = build_exception_variant (void_ftype_ptr, empty_except_spec);
3211 /* C++ extensions */
3213 unknown_type_node = make_node (UNKNOWN_TYPE);
3214 record_unknown_type (unknown_type_node, "unknown type");
3216 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
3217 TREE_TYPE (unknown_type_node) = unknown_type_node;
3219 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
3221 TYPE_POINTER_TO (unknown_type_node) = unknown_type_node;
3222 TYPE_REFERENCE_TO (unknown_type_node) = unknown_type_node;
3225 /* Make sure we get a unique function type, so we can give
3226 its pointer type a name. (This wins for gdb.) */
3227 tree vfunc_type = make_node (FUNCTION_TYPE);
3228 TREE_TYPE (vfunc_type) = integer_type_node;
3229 TYPE_ARG_TYPES (vfunc_type) = NULL_TREE;
3230 layout_type (vfunc_type);
3232 vtable_entry_type = build_pointer_type (vfunc_type);
3234 record_builtin_type (RID_MAX, VTBL_PTR_TYPE, vtable_entry_type);
3237 = build_cplus_array_type (vtable_entry_type, NULL_TREE);
3238 layout_type (vtbl_type_node);
3239 vtbl_type_node = build_qualified_type (vtbl_type_node, TYPE_QUAL_CONST);
3240 record_builtin_type (RID_MAX, NULL, vtbl_type_node);
3241 vtbl_ptr_type_node = build_pointer_type (vtable_entry_type);
3242 layout_type (vtbl_ptr_type_node);
3243 record_builtin_type (RID_MAX, NULL, vtbl_ptr_type_node);
3245 push_namespace (get_identifier ("__cxxabiv1"));
3246 abi_node = current_namespace;
3249 global_type_node = make_node (LANG_TYPE);
3250 record_unknown_type (global_type_node, "global type");
3253 current_lang_name = lang_name_cplusplus;
3257 tree bad_alloc_type_node;
3258 tree bad_alloc_decl;
3259 tree newtype, deltype;
3260 tree ptr_ftype_sizetype;
3262 push_namespace (std_identifier);
3263 bad_alloc_id = get_identifier ("bad_alloc");
3264 bad_alloc_type_node = make_aggr_type (RECORD_TYPE);
3265 TYPE_CONTEXT (bad_alloc_type_node) = current_namespace;
3267 = create_implicit_typedef (bad_alloc_id, bad_alloc_type_node);
3268 DECL_CONTEXT (bad_alloc_decl) = current_namespace;
3269 TYPE_STUB_DECL (bad_alloc_type_node) = bad_alloc_decl;
3273 = build_function_type (ptr_type_node,
3274 tree_cons (NULL_TREE,
3277 newtype = build_exception_variant
3278 (ptr_ftype_sizetype, add_exception_specifier
3279 (NULL_TREE, bad_alloc_type_node, -1));
3280 deltype = build_exception_variant (void_ftype_ptr, empty_except_spec);
3281 push_cp_library_fn (NEW_EXPR, newtype);
3282 push_cp_library_fn (VEC_NEW_EXPR, newtype);
3283 global_delete_fndecl = push_cp_library_fn (DELETE_EXPR, deltype);
3284 push_cp_library_fn (VEC_DELETE_EXPR, deltype);
3288 = build_library_fn_ptr ("__cxa_pure_virtual", void_ftype);
3290 /* Perform other language dependent initializations. */
3291 init_class_processing ();
3292 init_rtti_processing ();
3294 if (flag_exceptions)
3295 init_exception_processing ();
3297 if (! supports_one_only ())
3300 make_fname_decl = cp_make_fname_decl;
3301 start_fname_decls ();
3303 /* Show we use EH for cleanups. */
3304 if (flag_exceptions)
3305 using_eh_for_cleanups ();
3308 /* Generate an initializer for a function naming variable from
3309 NAME. NAME may be NULL, to indicate a dependent name. TYPE_P is
3310 filled in with the type of the init. */
3313 cp_fname_init (const char* name, tree *type_p)
3315 tree domain = NULL_TREE;
3317 tree init = NULL_TREE;
3322 length = strlen (name);
3323 domain = build_index_type (size_int (length));
3324 init = build_string (length + 1, name);
3327 type = build_qualified_type (char_type_node, TYPE_QUAL_CONST);
3328 type = build_cplus_array_type (type, domain);
3333 TREE_TYPE (init) = type;
3335 init = error_mark_node;
3340 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give the
3341 decl, NAME is the initialization string and TYPE_DEP indicates whether
3342 NAME depended on the type of the function. We make use of that to detect
3343 __PRETTY_FUNCTION__ inside a template fn. This is being done
3344 lazily at the point of first use, so we mustn't push the decl now. */
3347 cp_make_fname_decl (tree id, int type_dep)
3349 const char *const name = (type_dep && processing_template_decl
3350 ? NULL : fname_as_string (type_dep));
3352 tree init = cp_fname_init (name, &type);
3353 tree decl = build_decl (VAR_DECL, id, type);
3356 free ((char *) name);
3358 /* As we're using pushdecl_with_scope, we must set the context. */
3359 DECL_CONTEXT (decl) = current_function_decl;
3360 DECL_PRETTY_FUNCTION_P (decl) = type_dep;
3362 TREE_STATIC (decl) = 1;
3363 TREE_READONLY (decl) = 1;
3364 DECL_ARTIFICIAL (decl) = 1;
3366 TREE_USED (decl) = 1;
3368 if (current_function_decl)
3370 struct cp_binding_level *b = current_binding_level;
3371 while (b->level_chain->kind != sk_function_parms)
3373 pushdecl_with_scope (decl, b, /*is_friend=*/false);
3374 cp_finish_decl (decl, init, /*init_const_expr_p=*/false, NULL_TREE,
3375 LOOKUP_ONLYCONVERTING);
3378 pushdecl_top_level_and_finish (decl, init);
3384 builtin_function_1 (tree decl, tree context)
3386 tree id = DECL_NAME (decl);
3387 const char *name = IDENTIFIER_POINTER (id);
3389 retrofit_lang_decl (decl);
3391 /* All nesting of C++ functions is lexical; there is never a "static
3392 chain" in the sense of GNU C nested functions. */
3393 DECL_NO_STATIC_CHAIN (decl) = 1;
3395 DECL_ARTIFICIAL (decl) = 1;
3396 SET_OVERLOADED_OPERATOR_CODE (decl, ERROR_MARK);
3397 SET_DECL_LANGUAGE (decl, lang_c);
3398 /* Runtime library routines are, by definition, available in an
3399 external shared object. */
3400 DECL_VISIBILITY (decl) = VISIBILITY_DEFAULT;
3401 DECL_VISIBILITY_SPECIFIED (decl) = 1;
3403 DECL_CONTEXT (decl) = context;
3407 /* A function in the user's namespace should have an explicit
3408 declaration before it is used. Mark the built-in function as
3409 anticipated but not actually declared. */
3410 if (name[0] != '_' || name[1] != '_')
3411 DECL_ANTICIPATED (decl) = 1;
3417 cxx_builtin_function (tree decl)
3419 tree id = DECL_NAME (decl);
3420 const char *name = IDENTIFIER_POINTER (id);
3421 /* All builtins that don't begin with an '_' should additionally
3422 go in the 'std' namespace. */
3425 tree decl2 = copy_node(decl);
3426 push_namespace (std_identifier);
3427 builtin_function_1 (decl2, std_node);
3431 return builtin_function_1 (decl, NULL_TREE);
3434 /* Generate a FUNCTION_DECL with the typical flags for a runtime library
3435 function. Not called directly. */
3438 build_library_fn_1 (tree name, enum tree_code operator_code, tree type)
3440 tree fn = build_lang_decl (FUNCTION_DECL, name, type);
3441 DECL_EXTERNAL (fn) = 1;
3442 TREE_PUBLIC (fn) = 1;
3443 DECL_ARTIFICIAL (fn) = 1;
3444 SET_OVERLOADED_OPERATOR_CODE (fn, operator_code);
3445 SET_DECL_LANGUAGE (fn, lang_c);
3446 /* Runtime library routines are, by definition, available in an
3447 external shared object. */
3448 DECL_VISIBILITY (fn) = VISIBILITY_DEFAULT;
3449 DECL_VISIBILITY_SPECIFIED (fn) = 1;
3453 /* Returns the _DECL for a library function with C linkage.
3454 We assume that such functions never throw; if this is incorrect,
3455 callers should unset TREE_NOTHROW. */
3458 build_library_fn (tree name, tree type)
3460 tree fn = build_library_fn_1 (name, ERROR_MARK, type);
3461 TREE_NOTHROW (fn) = 1;
3465 /* Returns the _DECL for a library function with C++ linkage. */
3468 build_cp_library_fn (tree name, enum tree_code operator_code, tree type)
3470 tree fn = build_library_fn_1 (name, operator_code, type);
3471 TREE_NOTHROW (fn) = TYPE_NOTHROW_P (type);
3472 DECL_CONTEXT (fn) = FROB_CONTEXT (current_namespace);
3473 SET_DECL_LANGUAGE (fn, lang_cplusplus);
3477 /* Like build_library_fn, but takes a C string instead of an
3481 build_library_fn_ptr (const char* name, tree type)
3483 return build_library_fn (get_identifier (name), type);
3486 /* Like build_cp_library_fn, but takes a C string instead of an
3490 build_cp_library_fn_ptr (const char* name, tree type)
3492 return build_cp_library_fn (get_identifier (name), ERROR_MARK, type);
3495 /* Like build_library_fn, but also pushes the function so that we will
3496 be able to find it via IDENTIFIER_GLOBAL_VALUE. */
3499 push_library_fn (tree name, tree type)
3501 tree fn = build_library_fn (name, type);
3502 pushdecl_top_level (fn);
3506 /* Like build_cp_library_fn, but also pushes the function so that it
3507 will be found by normal lookup. */
3510 push_cp_library_fn (enum tree_code operator_code, tree type)
3512 tree fn = build_cp_library_fn (ansi_opname (operator_code),
3519 /* Like push_library_fn, but takes a TREE_LIST of parm types rather than
3523 push_void_library_fn (tree name, tree parmtypes)
3525 tree type = build_function_type (void_type_node, parmtypes);
3526 return push_library_fn (name, type);
3529 /* Like push_library_fn, but also note that this function throws
3530 and does not return. Used for __throw_foo and the like. */
3533 push_throw_library_fn (tree name, tree type)
3535 tree fn = push_library_fn (name, type);
3536 TREE_THIS_VOLATILE (fn) = 1;
3537 TREE_NOTHROW (fn) = 0;
3541 /* When we call finish_struct for an anonymous union, we create
3542 default copy constructors and such. But, an anonymous union
3543 shouldn't have such things; this function undoes the damage to the
3544 anonymous union type T.
3546 (The reason that we create the synthesized methods is that we don't
3547 distinguish `union { int i; }' from `typedef union { int i; } U'.
3548 The first is an anonymous union; the second is just an ordinary
3552 fixup_anonymous_aggr (tree t)
3556 /* Wipe out memory of synthesized methods. */
3557 TYPE_HAS_CONSTRUCTOR (t) = 0;
3558 TYPE_HAS_DEFAULT_CONSTRUCTOR (t) = 0;
3559 TYPE_HAS_INIT_REF (t) = 0;
3560 TYPE_HAS_CONST_INIT_REF (t) = 0;
3561 TYPE_HAS_ASSIGN_REF (t) = 0;
3562 TYPE_HAS_CONST_ASSIGN_REF (t) = 0;
3564 /* Splice the implicitly generated functions out of the TYPE_METHODS
3566 q = &TYPE_METHODS (t);
3569 if (DECL_ARTIFICIAL (*q))
3570 *q = TREE_CHAIN (*q);
3572 q = &TREE_CHAIN (*q);
3575 /* ISO C++ 9.5.3. Anonymous unions may not have function members. */
3576 if (TYPE_METHODS (t))
3577 error ("%Jan anonymous union cannot have function members",
3578 TYPE_MAIN_DECL (t));
3580 /* Anonymous aggregates cannot have fields with ctors, dtors or complex
3581 assignment operators (because they cannot have these methods themselves).
3582 For anonymous unions this is already checked because they are not allowed
3583 in any union, otherwise we have to check it. */
3584 if (TREE_CODE (t) != UNION_TYPE)
3588 for (field = TYPE_FIELDS (t); field; field = TREE_CHAIN (field))
3589 if (TREE_CODE (field) == FIELD_DECL)
3591 type = TREE_TYPE (field);
3592 if (CLASS_TYPE_P (type))
3594 if (TYPE_NEEDS_CONSTRUCTING (type))
3595 error ("member %q+#D with constructor not allowed "
3596 "in anonymous aggregate", field);
3597 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
3598 error ("member %q+#D with destructor not allowed "
3599 "in anonymous aggregate", field);
3600 if (TYPE_HAS_COMPLEX_ASSIGN_REF (type))
3601 error ("member %q+#D with copy assignment operator "
3602 "not allowed in anonymous aggregate", field);
3608 /* Make sure that a declaration with no declarator is well-formed, i.e.
3609 just declares a tagged type or anonymous union.
3611 Returns the type declared; or NULL_TREE if none. */
3614 check_tag_decl (cp_decl_specifier_seq *declspecs)
3616 int saw_friend = declspecs->specs[(int)ds_friend] != 0;
3617 int saw_typedef = declspecs->specs[(int)ds_typedef] != 0;
3618 /* If a class, struct, or enum type is declared by the DECLSPECS
3619 (i.e, if a class-specifier, enum-specifier, or non-typename
3620 elaborated-type-specifier appears in the DECLSPECS),
3621 DECLARED_TYPE is set to the corresponding type. */
3622 tree declared_type = NULL_TREE;
3623 bool error_p = false;
3625 if (declspecs->multiple_types_p)
3626 error ("multiple types in one declaration");
3627 else if (declspecs->redefined_builtin_type)
3629 if (!in_system_header)
3630 pedwarn ("redeclaration of C++ built-in type %qT",
3631 declspecs->redefined_builtin_type);
3636 && TYPE_P (declspecs->type)
3637 && ((TREE_CODE (declspecs->type) != TYPENAME_TYPE
3638 && IS_AGGR_TYPE (declspecs->type))
3639 || TREE_CODE (declspecs->type) == ENUMERAL_TYPE))
3640 declared_type = declspecs->type;
3641 else if (declspecs->type == error_mark_node)
3643 if (declared_type == NULL_TREE && ! saw_friend && !error_p)
3644 pedwarn ("declaration does not declare anything");
3645 /* Check for an anonymous union. */
3646 else if (declared_type && IS_AGGR_TYPE_CODE (TREE_CODE (declared_type))
3647 && TYPE_ANONYMOUS_P (declared_type))
3649 /* 7/3 In a simple-declaration, the optional init-declarator-list
3650 can be omitted only when declaring a class (clause 9) or
3651 enumeration (7.2), that is, when the decl-specifier-seq contains
3652 either a class-specifier, an elaborated-type-specifier with
3653 a class-key (9.1), or an enum-specifier. In these cases and
3654 whenever a class-specifier or enum-specifier is present in the
3655 decl-specifier-seq, the identifiers in these specifiers are among
3656 the names being declared by the declaration (as class-name,
3657 enum-names, or enumerators, depending on the syntax). In such
3658 cases, and except for the declaration of an unnamed bit-field (9.6),
3659 the decl-specifier-seq shall introduce one or more names into the
3660 program, or shall redeclare a name introduced by a previous
3661 declaration. [Example:
3662 enum { }; // ill-formed
3663 typedef class { }; // ill-formed
3667 error ("missing type-name in typedef-declaration");
3670 /* Anonymous unions are objects, so they can have specifiers. */;
3671 SET_ANON_AGGR_TYPE_P (declared_type);
3673 if (TREE_CODE (declared_type) != UNION_TYPE && pedantic
3674 && !in_system_header)
3675 pedwarn ("ISO C++ prohibits anonymous structs");
3680 if (declspecs->specs[(int)ds_inline]
3681 || declspecs->specs[(int)ds_virtual])
3682 error ("%qs can only be specified for functions",
3683 declspecs->specs[(int)ds_inline]
3684 ? "inline" : "virtual");
3686 && (!current_class_type
3687 || current_scope () != current_class_type))
3688 error ("%<friend%> can only be specified inside a class");
3689 else if (declspecs->specs[(int)ds_explicit])
3690 error ("%<explicit%> can only be specified for constructors");
3691 else if (declspecs->storage_class)
3692 error ("a storage class can only be specified for objects "
3694 else if (declspecs->specs[(int)ds_const]
3695 || declspecs->specs[(int)ds_volatile]
3696 || declspecs->specs[(int)ds_restrict]
3697 || declspecs->specs[(int)ds_thread])
3698 error ("qualifiers can only be specified for objects "
3700 else if (saw_typedef)
3701 warning (0, "%<typedef%> was ignored in this declaration");
3704 return declared_type;
3707 /* Called when a declaration is seen that contains no names to declare.
3708 If its type is a reference to a structure, union or enum inherited
3709 from a containing scope, shadow that tag name for the current scope
3710 with a forward reference.
3711 If its type defines a new named structure or union
3712 or defines an enum, it is valid but we need not do anything here.
3713 Otherwise, it is an error.
3715 C++: may have to grok the declspecs to learn about static,
3716 complain for anonymous unions.
3718 Returns the TYPE declared -- or NULL_TREE if none. */
3721 shadow_tag (cp_decl_specifier_seq *declspecs)
3723 tree t = check_tag_decl (declspecs);
3728 if (declspecs->attributes)
3730 warning (0, "attribute ignored in declaration of %q+#T", t);
3731 warning (0, "attribute for %q+#T must follow the %qs keyword",
3732 t, class_key_or_enum_as_string (t));
3736 if (maybe_process_partial_specialization (t) == error_mark_node)
3739 /* This is where the variables in an anonymous union are
3740 declared. An anonymous union declaration looks like:
3742 because there is no declarator after the union, the parser
3743 sends that declaration here. */
3744 if (ANON_AGGR_TYPE_P (t))
3746 fixup_anonymous_aggr (t);
3748 if (TYPE_FIELDS (t))
3750 tree decl = grokdeclarator (/*declarator=*/NULL,
3751 declspecs, NORMAL, 0, NULL);
3752 finish_anon_union (decl);
3759 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
3762 groktypename (cp_decl_specifier_seq *type_specifiers,
3763 const cp_declarator *declarator)
3767 attrs = type_specifiers->attributes;
3768 type_specifiers->attributes = NULL_TREE;
3769 type = grokdeclarator (declarator, type_specifiers, TYPENAME, 0, &attrs);
3771 cplus_decl_attributes (&type, attrs, 0);
3775 /* Decode a declarator in an ordinary declaration or data definition.
3776 This is called as soon as the type information and variable name
3777 have been parsed, before parsing the initializer if any.
3778 Here we create the ..._DECL node, fill in its type,
3779 and put it on the list of decls for the current context.
3780 The ..._DECL node is returned as the value.
3782 Exception: for arrays where the length is not specified,
3783 the type is left null, to be filled in by `cp_finish_decl'.
3785 Function definitions do not come here; they go to start_function
3786 instead. However, external and forward declarations of functions
3787 do go through here. Structure field declarations are done by
3788 grokfield and not through here. */
3791 start_decl (const cp_declarator *declarator,
3792 cp_decl_specifier_seq *declspecs,
3795 tree prefix_attributes,
3796 tree *pushed_scope_p)
3803 *pushed_scope_p = NULL_TREE;
3805 /* An object declared as __attribute__((deprecated)) suppresses
3806 warnings of uses of other deprecated items. */
3807 if (lookup_attribute ("deprecated", attributes))
3808 deprecated_state = DEPRECATED_SUPPRESS;
3810 attributes = chainon (attributes, prefix_attributes);
3812 decl = grokdeclarator (declarator, declspecs, NORMAL, initialized,
3815 deprecated_state = DEPRECATED_NORMAL;
3817 if (decl == NULL_TREE || TREE_CODE (decl) == VOID_TYPE
3818 || decl == error_mark_node)
3819 return error_mark_node;
3821 type = TREE_TYPE (decl);
3823 context = DECL_CONTEXT (decl);
3827 *pushed_scope_p = push_scope (context);
3829 /* We are only interested in class contexts, later. */
3830 if (TREE_CODE (context) == NAMESPACE_DECL)
3831 context = NULL_TREE;
3835 /* Is it valid for this decl to have an initializer at all?
3836 If not, set INITIALIZED to zero, which will indirectly
3837 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
3838 switch (TREE_CODE (decl))
3841 error ("typedef %qD is initialized (use __typeof__ instead)", decl);
3842 return error_mark_node;
3845 error ("function %q#D is initialized like a variable", decl);
3846 return error_mark_node;
3854 if (! toplevel_bindings_p ()
3855 && DECL_EXTERNAL (decl))
3856 warning (0, "declaration of %q#D has %<extern%> and is initialized",
3858 DECL_EXTERNAL (decl) = 0;
3859 if (toplevel_bindings_p ())
3860 TREE_STATIC (decl) = 1;
3863 /* Set attributes here so if duplicate decl, will have proper attributes. */
3864 cplus_decl_attributes (&decl, attributes, 0);
3866 /* Dllimported symbols cannot be defined. Static data members (which
3867 can be initialized in-class and dllimported) go through grokfield,
3868 not here, so we don't need to exclude those decls when checking for
3870 if (initialized && DECL_DLLIMPORT_P (decl))
3872 error ("definition of %q#D is marked %<dllimport%>", decl);
3873 DECL_DLLIMPORT_P (decl) = 0;
3876 /* If #pragma weak was used, mark the decl weak now. */
3877 maybe_apply_pragma_weak (decl);
3879 if (TREE_CODE (decl) == FUNCTION_DECL
3880 && DECL_DECLARED_INLINE_P (decl)
3881 && DECL_UNINLINABLE (decl)
3882 && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl)))
3883 warning (0, "inline function %q+D given attribute noinline", decl);
3885 if (context && COMPLETE_TYPE_P (complete_type (context)))
3887 if (TREE_CODE (decl) == VAR_DECL)
3889 tree field = lookup_field (context, DECL_NAME (decl), 0, false);
3890 if (field == NULL_TREE || TREE_CODE (field) != VAR_DECL)
3891 error ("%q#D is not a static member of %q#T", decl, context);
3894 if (DECL_CONTEXT (field) != context)
3896 if (!same_type_p (DECL_CONTEXT (field), context))
3897 pedwarn ("ISO C++ does not permit %<%T::%D%> "
3898 "to be defined as %<%T::%D%>",
3899 DECL_CONTEXT (field), DECL_NAME (decl),
3900 context, DECL_NAME (decl));
3901 DECL_CONTEXT (decl) = DECL_CONTEXT (field);
3903 if (processing_specialization
3904 && template_class_depth (context) == 0
3905 && CLASSTYPE_TEMPLATE_SPECIALIZATION (context))
3906 error ("template header not allowed in member definition "
3907 "of explicitly specialized class");
3908 /* Static data member are tricky; an in-class initialization
3909 still doesn't provide a definition, so the in-class
3910 declaration will have DECL_EXTERNAL set, but will have an
3911 initialization. Thus, duplicate_decls won't warn
3912 about this situation, and so we check here. */
3913 if (initialized && DECL_INITIALIZED_IN_CLASS_P (field))
3914 error ("duplicate initialization of %qD", decl);
3915 if (duplicate_decls (decl, field, /*newdecl_is_friend=*/false))
3921 tree field = check_classfn (context, decl,
3922 (processing_template_decl
3923 > template_class_depth (context))
3924 ? current_template_parms
3926 if (field && duplicate_decls (decl, field,
3927 /*newdecl_is_friend=*/false))
3931 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
3932 DECL_IN_AGGR_P (decl) = 0;
3933 /* Do not mark DECL as an explicit specialization if it was not
3934 already marked as an instantiation; a declaration should
3935 never be marked as a specialization unless we know what
3936 template is being specialized. */
3937 if (DECL_LANG_SPECIFIC (decl) && DECL_USE_TEMPLATE (decl))
3939 SET_DECL_TEMPLATE_SPECIALIZATION (decl);
3941 /* [temp.expl.spec] An explicit specialization of a static data
3942 member of a template is a definition if the declaration
3943 includes an initializer; otherwise, it is a declaration.
3945 We check for processing_specialization so this only applies
3946 to the new specialization syntax. */
3947 if (!initialized && processing_specialization)
3948 DECL_EXTERNAL (decl) = 1;
3951 if (DECL_EXTERNAL (decl) && ! DECL_TEMPLATE_SPECIALIZATION (decl))
3952 pedwarn ("declaration of %q#D outside of class is not definition",
3956 was_public = TREE_PUBLIC (decl);
3958 /* Enter this declaration into the symbol table. */
3959 tem = maybe_push_decl (decl);
3961 if (processing_template_decl)
3962 tem = push_template_decl (tem);
3963 if (tem == error_mark_node)
3964 return error_mark_node;
3966 /* Tell the back end to use or not use .common as appropriate. If we say
3967 -fconserve-space, we want this to save .data space, at the expense of
3968 wrong semantics. If we say -fno-conserve-space, we want this to
3969 produce errors about redefs; to do this we force variables into the
3971 if (flag_conserve_space
3972 && TREE_CODE (tem) == VAR_DECL
3973 && TREE_PUBLIC (tem)
3974 && !DECL_THREAD_LOCAL_P (tem)
3975 && !have_global_bss_p ())
3976 DECL_COMMON (tem) = 1;
3978 if (TREE_CODE (tem) == VAR_DECL
3979 && DECL_NAMESPACE_SCOPE_P (tem) && !TREE_PUBLIC (tem) && !was_public
3980 && !DECL_THIS_STATIC (tem) && !DECL_ARTIFICIAL (tem))
3982 /* This is a const variable with implicit 'static'. Set
3983 DECL_THIS_STATIC so we can tell it from variables that are
3984 !TREE_PUBLIC because of the anonymous namespace. */
3985 gcc_assert (cp_type_readonly (TREE_TYPE (tem)));
3986 DECL_THIS_STATIC (tem) = 1;
3989 if (!processing_template_decl && TREE_CODE (tem) == VAR_DECL)
3990 start_decl_1 (tem, initialized);
3996 start_decl_1 (tree decl, bool initialized)
4000 gcc_assert (!processing_template_decl);
4002 if (error_operand_p (decl))
4005 gcc_assert (TREE_CODE (decl) == VAR_DECL);
4006 type = TREE_TYPE (decl);
4009 /* Is it valid for this decl to have an initializer at all?
4010 If not, set INITIALIZED to zero, which will indirectly
4011 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
4013 /* Don't allow initializations for incomplete types except for
4014 arrays which might be completed by the initialization. */
4015 if (COMPLETE_TYPE_P (complete_type (type)))
4016 ; /* A complete type is ok. */
4017 else if (TREE_CODE (type) != ARRAY_TYPE)
4019 error ("variable %q#D has initializer but incomplete type", decl);
4021 type = TREE_TYPE (decl) = error_mark_node;
4023 else if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (type))))
4025 if (DECL_LANG_SPECIFIC (decl) && DECL_TEMPLATE_INFO (decl))
4026 error ("elements of array %q#D have incomplete type", decl);
4027 /* else we already gave an error in start_decl. */
4031 else if (IS_AGGR_TYPE (type)
4032 && ! DECL_EXTERNAL (decl))
4034 if (!COMPLETE_TYPE_P (complete_type (type)))
4036 error ("aggregate %q#D has incomplete type and cannot be defined",
4038 /* Change the type so that assemble_variable will give
4039 DECL an rtl we can live with: (mem (const_int 0)). */
4040 type = TREE_TYPE (decl) = error_mark_node;
4044 /* If any base type in the hierarchy of TYPE needs a constructor,
4045 then we set initialized to 1. This way any nodes which are
4046 created for the purposes of initializing this aggregate
4047 will live as long as it does. This is necessary for global
4048 aggregates which do not have their initializers processed until
4049 the end of the file. */
4050 initialized = TYPE_NEEDS_CONSTRUCTING (type);
4054 /* Create a new scope to hold this declaration if necessary.
4055 Whether or not a new scope is necessary cannot be determined
4056 until after the type has been completed; if the type is a
4057 specialization of a class template it is not until after
4058 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
4059 will be set correctly. */
4060 maybe_push_cleanup_level (type);
4063 /* Handle initialization of references. DECL, TYPE, and INIT have the
4064 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
4065 but will be set to a new CLEANUP_STMT if a temporary is created
4066 that must be destroyed subsequently.
4068 Returns an initializer expression to use to initialize DECL, or
4069 NULL if the initialization can be performed statically.
4071 Quotes on semantics can be found in ARM 8.4.3. */
4074 grok_reference_init (tree decl, tree type, tree init, tree *cleanup)
4078 if (init == NULL_TREE)
4080 if ((DECL_LANG_SPECIFIC (decl) == 0
4081 || DECL_IN_AGGR_P (decl) == 0)
4082 && ! DECL_THIS_EXTERN (decl))
4083 error ("%qD declared as reference but not initialized", decl);
4087 if (TREE_CODE (init) == CONSTRUCTOR)
4089 error ("ISO C++ forbids use of initializer list to "
4090 "initialize reference %qD", decl);
4094 if (TREE_CODE (init) == TREE_LIST)
4095 init = build_x_compound_expr_from_list (init, "initializer");
4097 if (TREE_CODE (TREE_TYPE (type)) != ARRAY_TYPE
4098 && TREE_CODE (TREE_TYPE (init)) == ARRAY_TYPE)
4099 /* Note: default conversion is only called in very special cases. */
4100 init = decay_conversion (init);
4102 /* Convert INIT to the reference type TYPE. This may involve the
4103 creation of a temporary, whose lifetime must be the same as that
4104 of the reference. If so, a DECL_EXPR for the temporary will be
4105 added just after the DECL_EXPR for DECL. That's why we don't set
4106 DECL_INITIAL for local references (instead assigning to them
4107 explicitly); we need to allow the temporary to be initialized
4109 tmp = initialize_reference (type, init, decl, cleanup);
4111 if (tmp == error_mark_node)
4113 else if (tmp == NULL_TREE)
4115 error ("cannot initialize %qT from %qT", type, TREE_TYPE (init));
4119 if (TREE_STATIC (decl) && !TREE_CONSTANT (tmp))
4122 DECL_INITIAL (decl) = tmp;
4127 /* Designated initializers in arrays are not supported in GNU C++.
4128 The parser cannot detect this error since it does not know whether
4129 a given brace-enclosed initializer is for a class type or for an
4130 array. This function checks that CE does not use a designated
4131 initializer. If it does, an error is issued. Returns true if CE
4132 is valid, i.e., does not have a designated initializer. */
4135 check_array_designated_initializer (const constructor_elt *ce)
4137 /* Designated initializers for array elements are not supported. */
4140 /* The parser only allows identifiers as designated
4142 gcc_assert (TREE_CODE (ce->index) == IDENTIFIER_NODE);
4143 error ("name %qD used in a GNU-style designated "
4144 "initializer for an array", ce->index);
4151 /* When parsing `int a[] = {1, 2};' we don't know the size of the
4152 array until we finish parsing the initializer. If that's the
4153 situation we're in, update DECL accordingly. */
4156 maybe_deduce_size_from_array_init (tree decl, tree init)
4158 tree type = TREE_TYPE (decl);
4160 if (TREE_CODE (type) == ARRAY_TYPE
4161 && TYPE_DOMAIN (type) == NULL_TREE
4162 && TREE_CODE (decl) != TYPE_DECL)
4164 /* do_default is really a C-ism to deal with tentative definitions.
4165 But let's leave it here to ease the eventual merge. */
4166 int do_default = !DECL_EXTERNAL (decl);
4167 tree initializer = init ? init : DECL_INITIAL (decl);
4170 /* Check that there are no designated initializers in INIT, as
4171 those are not supported in GNU C++, and as the middle-end
4172 will crash if presented with a non-numeric designated
4174 if (initializer && TREE_CODE (initializer) == CONSTRUCTOR)
4176 VEC(constructor_elt,gc) *v = CONSTRUCTOR_ELTS (initializer);
4177 constructor_elt *ce;
4180 VEC_iterate (constructor_elt, v, i, ce);
4182 if (!check_array_designated_initializer (ce))
4188 failure = cp_complete_array_type (&TREE_TYPE (decl), initializer,
4192 error ("initializer fails to determine size of %qD", decl);
4193 TREE_TYPE (decl) = error_mark_node;
4195 else if (failure == 2)
4199 error ("array size missing in %qD", decl);
4200 TREE_TYPE (decl) = error_mark_node;
4202 /* If a `static' var's size isn't known, make it extern as
4203 well as static, so it does not get allocated. If it's not
4204 `static', then don't mark it extern; finish_incomplete_decl
4205 will give it a default size and it will get allocated. */
4206 else if (!pedantic && TREE_STATIC (decl) && !TREE_PUBLIC (decl))
4207 DECL_EXTERNAL (decl) = 1;
4209 else if (failure == 3)
4211 error ("zero-size array %qD", decl);
4212 TREE_TYPE (decl) = error_mark_node;
4216 cp_apply_type_quals_to_decl (cp_type_quals (TREE_TYPE (decl)), decl);
4218 layout_decl (decl, 0);
4222 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
4223 any appropriate error messages regarding the layout. */
4226 layout_var_decl (tree decl)
4230 type = TREE_TYPE (decl);
4231 if (type == error_mark_node)
4234 /* If we haven't already layed out this declaration, do so now.
4235 Note that we must not call complete type for an external object
4236 because it's type might involve templates that we are not
4237 supposed to instantiate yet. (And it's perfectly valid to say
4238 `extern X x' for some incomplete type `X'.) */
4239 if (!DECL_EXTERNAL (decl))
4240 complete_type (type);
4241 if (!DECL_SIZE (decl)
4242 && TREE_TYPE (decl) != error_mark_node
4243 && (COMPLETE_TYPE_P (type)
4244 || (TREE_CODE (type) == ARRAY_TYPE
4245 && !TYPE_DOMAIN (type)
4246 && COMPLETE_TYPE_P (TREE_TYPE (type)))))
4247 layout_decl (decl, 0);
4249 if (!DECL_EXTERNAL (decl) && DECL_SIZE (decl) == NULL_TREE)
4251 /* An automatic variable with an incomplete type: that is an error.
4252 Don't talk about array types here, since we took care of that
4253 message in grokdeclarator. */
4254 error ("storage size of %qD isn't known", decl);
4255 TREE_TYPE (decl) = error_mark_node;
4258 /* Keep this code around in case we later want to control debug info
4259 based on whether a type is "used". (jason 1999-11-11) */
4261 else if (!DECL_EXTERNAL (decl) && IS_AGGR_TYPE (ttype))
4262 /* Let debugger know it should output info for this type. */
4263 note_debug_info_needed (ttype);
4265 if (TREE_STATIC (decl) && DECL_CLASS_SCOPE_P (decl))
4266 note_debug_info_needed (DECL_CONTEXT (decl));
4269 if ((DECL_EXTERNAL (decl) || TREE_STATIC (decl))
4270 && DECL_SIZE (decl) != NULL_TREE
4271 && ! TREE_CONSTANT (DECL_SIZE (decl)))
4273 if (TREE_CODE (DECL_SIZE (decl)) == INTEGER_CST)
4274 constant_expression_warning (DECL_SIZE (decl));
4276 error ("storage size of %qD isn't constant", decl);
4280 /* If a local static variable is declared in an inline function, or if
4281 we have a weak definition, we must endeavor to create only one
4282 instance of the variable at link-time. */
4285 maybe_commonize_var (tree decl)
4287 /* Static data in a function with comdat linkage also has comdat
4289 if (TREE_STATIC (decl)
4290 /* Don't mess with __FUNCTION__. */
4291 && ! DECL_ARTIFICIAL (decl)
4292 && DECL_FUNCTION_SCOPE_P (decl)
4293 /* Unfortunately, import_export_decl has not always been called
4294 before the function is processed, so we cannot simply check
4296 && (DECL_COMDAT (DECL_CONTEXT (decl))
4297 || ((DECL_DECLARED_INLINE_P (DECL_CONTEXT (decl))
4298 || DECL_TEMPLATE_INSTANTIATION (DECL_CONTEXT (decl)))
4299 && TREE_PUBLIC (DECL_CONTEXT (decl)))))
4303 /* With weak symbols, we simply make the variable COMDAT;
4304 that will cause copies in multiple translations units to
4306 comdat_linkage (decl);
4310 if (DECL_INITIAL (decl) == NULL_TREE
4311 || DECL_INITIAL (decl) == error_mark_node)
4313 /* Without weak symbols, we can use COMMON to merge
4314 uninitialized variables. */
4315 TREE_PUBLIC (decl) = 1;
4316 DECL_COMMON (decl) = 1;
4320 /* While for initialized variables, we must use internal
4321 linkage -- which means that multiple copies will not
4323 TREE_PUBLIC (decl) = 0;
4324 DECL_COMMON (decl) = 0;
4325 warning (0, "sorry: semantics of inline function static "
4326 "data %q+#D are wrong (you'll wind up "
4327 "with multiple copies)", decl);
4328 warning (0, "%J you can work around this by removing "
4334 else if (DECL_LANG_SPECIFIC (decl) && DECL_COMDAT (decl))
4335 /* Set it up again; we might have set DECL_INITIAL since the last
4337 comdat_linkage (decl);
4340 /* Issue an error message if DECL is an uninitialized const variable. */
4343 check_for_uninitialized_const_var (tree decl)
4345 tree type = TREE_TYPE (decl);
4347 /* ``Unless explicitly declared extern, a const object does not have
4348 external linkage and must be initialized. ($8.4; $12.1)'' ARM
4350 if (TREE_CODE (decl) == VAR_DECL
4351 && TREE_CODE (type) != REFERENCE_TYPE
4352 && CP_TYPE_CONST_P (type)
4353 && !TYPE_NEEDS_CONSTRUCTING (type)
4354 && !DECL_INITIAL (decl))
4355 error ("uninitialized const %qD", decl);
4359 /* Structure holding the current initializer being processed by reshape_init.
4360 CUR is a pointer to the current element being processed, END is a pointer
4361 after the last element present in the initializer. */
4362 typedef struct reshape_iterator_t
4364 constructor_elt *cur;
4365 constructor_elt *end;
4368 static tree reshape_init_r (tree, reshape_iter *, bool);
4370 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
4371 returned is the next FIELD_DECL (possibly FIELD itself) that can be
4372 initialized. If there are no more such fields, the return value
4376 next_initializable_field (tree field)
4379 && (TREE_CODE (field) != FIELD_DECL
4380 || (DECL_C_BIT_FIELD (field) && !DECL_NAME (field))
4381 || DECL_ARTIFICIAL (field)))
4382 field = TREE_CHAIN (field);
4387 /* Subroutine of reshape_init_array and reshape_init_vector, which does
4388 the actual work. ELT_TYPE is the element type of the array. MAX_INDEX is an
4389 INTEGER_CST representing the size of the array minus one (the maximum index),
4390 or NULL_TREE if the array was declared without specifying the size. D is
4391 the iterator within the constructor. */
4394 reshape_init_array_1 (tree elt_type, tree max_index, reshape_iter *d)
4397 bool sized_array_p = (max_index != NULL_TREE);
4398 unsigned HOST_WIDE_INT max_index_cst = 0;
4399 unsigned HOST_WIDE_INT index;
4401 /* The initializer for an array is always a CONSTRUCTOR. */
4402 new_init = build_constructor (NULL_TREE, NULL);
4406 /* Minus 1 is used for zero sized arrays. */
4407 if (integer_all_onesp (max_index))
4410 if (host_integerp (max_index, 1))
4411 max_index_cst = tree_low_cst (max_index, 1);
4412 /* sizetype is sign extended, not zero extended. */
4414 max_index_cst = tree_low_cst (fold_convert (size_type_node, max_index),
4418 /* Loop until there are no more initializers. */
4420 d->cur != d->end && (!sized_array_p || index <= max_index_cst);
4425 check_array_designated_initializer (d->cur);
4426 elt_init = reshape_init_r (elt_type, d, /*first_initializer_p=*/false);
4427 if (elt_init == error_mark_node)
4428 return error_mark_node;
4429 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init), NULL_TREE, elt_init);
4435 /* Subroutine of reshape_init_r, processes the initializers for arrays.
4436 Parameters are the same of reshape_init_r. */
4439 reshape_init_array (tree type, reshape_iter *d)
4441 tree max_index = NULL_TREE;
4443 gcc_assert (TREE_CODE (type) == ARRAY_TYPE);
4445 if (TYPE_DOMAIN (type))
4446 max_index = array_type_nelts (type);
4448 return reshape_init_array_1 (TREE_TYPE (type), max_index, d);
4451 /* Subroutine of reshape_init_r, processes the initializers for vectors.
4452 Parameters are the same of reshape_init_r. */
4455 reshape_init_vector (tree type, reshape_iter *d)
4457 tree max_index = NULL_TREE;
4460 gcc_assert (TREE_CODE (type) == VECTOR_TYPE);
4462 if (COMPOUND_LITERAL_P (d->cur->value))
4464 tree value = d->cur->value;
4465 if (!same_type_p (TREE_TYPE (value), type))
4467 error ("invalid type %qT as initializer for a vector of type %qT",
4468 TREE_TYPE (d->cur->value), type);
4469 value = error_mark_node;
4475 /* For a vector, the representation type is a struct
4476 containing a single member which is an array of the
4477 appropriate size. */
4478 rtype = TYPE_DEBUG_REPRESENTATION_TYPE (type);
4479 if (rtype && TYPE_DOMAIN (TREE_TYPE (TYPE_FIELDS (rtype))))
4480 max_index = array_type_nelts (TREE_TYPE (TYPE_FIELDS (rtype)));
4482 return reshape_init_array_1 (TREE_TYPE (type), max_index, d);
4485 /* Subroutine of reshape_init_r, processes the initializers for classes
4486 or union. Parameters are the same of reshape_init_r. */
4489 reshape_init_class (tree type, reshape_iter *d, bool first_initializer_p)
4494 gcc_assert (CLASS_TYPE_P (type));
4496 /* The initializer for a class is always a CONSTRUCTOR. */
4497 new_init = build_constructor (NULL_TREE, NULL);
4498 field = next_initializable_field (TYPE_FIELDS (type));
4504 An initializer for an aggregate member that is an
4505 empty class shall have the form of an empty
4506 initializer-list {}. */
4507 if (!first_initializer_p)
4509 error ("initializer for %qT must be brace-enclosed", type);
4510 return error_mark_node;
4515 /* Loop through the initializable fields, gathering initializers. */
4516 while (d->cur != d->end)
4520 /* Handle designated initializers, as an extension. */
4523 field = lookup_field_1 (type, d->cur->index, /*want_type=*/false);
4525 if (!field || TREE_CODE (field) != FIELD_DECL)
4527 error ("%qT has no non-static data member named %qD", type,
4529 return error_mark_node;
4533 /* If we processed all the member of the class, we are done. */
4537 field_init = reshape_init_r (TREE_TYPE (field), d,
4538 /*first_initializer_p=*/false);
4539 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init), field, field_init);
4543 When a union is initialized with a brace-enclosed
4544 initializer, the braces shall only contain an
4545 initializer for the first member of the union. */
4546 if (TREE_CODE (type) == UNION_TYPE)
4549 field = next_initializable_field (TREE_CHAIN (field));
4555 /* Subroutine of reshape_init, which processes a single initializer (part of
4556 a CONSTRUCTOR). TYPE is the type of the variable being initialized, D is the
4557 iterator within the CONSTRUCTOR which points to the initializer to process.
4558 FIRST_INITIALIZER_P is true if this is the first initializer of the
4559 CONSTRUCTOR node. */
4562 reshape_init_r (tree type, reshape_iter *d, bool first_initializer_p)
4564 tree init = d->cur->value;
4566 /* A non-aggregate type is always initialized with a single
4568 if (!CP_AGGREGATE_TYPE_P (type))
4570 /* It is invalid to initialize a non-aggregate type with a
4571 brace-enclosed initializer.
4572 We need to check for BRACE_ENCLOSED_INITIALIZER_P here because
4573 of g++.old-deja/g++.mike/p7626.C: a pointer-to-member constant is
4574 a CONSTRUCTOR (with a record type). */
4575 if (TREE_CODE (init) == CONSTRUCTOR
4576 && BRACE_ENCLOSED_INITIALIZER_P (init)) /* p7626.C */
4578 error ("braces around scalar initializer for type %qT", type);
4579 init = error_mark_node;
4588 All implicit type conversions (clause _conv_) are considered when
4589 initializing the aggregate member with an initializer from an
4590 initializer-list. If the initializer can initialize a member,
4591 the member is initialized. Otherwise, if the member is itself a
4592 non-empty subaggregate, brace elision is assumed and the
4593 initializer is considered for the initialization of the first
4594 member of the subaggregate. */
4595 if (TREE_CODE (init) != CONSTRUCTOR
4596 && can_convert_arg (type, TREE_TYPE (init), init, LOOKUP_NORMAL))
4602 /* [dcl.init.string]
4604 A char array (whether plain char, signed char, or unsigned char)
4605 can be initialized by a string-literal (optionally enclosed in
4606 braces); a wchar_t array can be initialized by a wide
4607 string-literal (optionally enclosed in braces). */
4608 if (TREE_CODE (type) == ARRAY_TYPE
4609 && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type))))
4611 tree str_init = init;
4613 /* Strip one level of braces if and only if they enclose a single
4614 element (as allowed by [dcl.init.string]). */
4615 if (!first_initializer_p
4616 && TREE_CODE (str_init) == CONSTRUCTOR
4617 && VEC_length (constructor_elt, CONSTRUCTOR_ELTS (str_init)) == 1)
4619 str_init = VEC_index (constructor_elt,
4620 CONSTRUCTOR_ELTS (str_init), 0)->value;
4623 /* If it's a string literal, then it's the initializer for the array
4624 as a whole. Otherwise, continue with normal initialization for
4625 array types (one value per array element). */
4626 if (TREE_CODE (str_init) == STRING_CST)
4633 /* The following cases are about aggregates. If we are not within a full
4634 initializer already, and there is not a CONSTRUCTOR, it means that there
4635 is a missing set of braces (that is, we are processing the case for
4636 which reshape_init exists). */
4637 if (!first_initializer_p)
4639 if (TREE_CODE (init) == CONSTRUCTOR)
4641 /* For a nested compound literal, there is no need to reshape since
4642 brace elision is not allowed. Even if we decided to allow it,
4643 we should add a call to reshape_init in finish_compound_literal,
4644 before calling digest_init, so changing this code would still
4645 not be necessary. */
4646 if (!COMPOUND_LITERAL_P (init))
4649 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init));
4650 return reshape_init (type, init);
4653 gcc_assert (!BRACE_ENCLOSED_INITIALIZER_P (init));
4656 warning (OPT_Wmissing_braces, "missing braces around initializer for %qT",
4660 /* Dispatch to specialized routines. */
4661 if (CLASS_TYPE_P (type))
4662 return reshape_init_class (type, d, first_initializer_p);
4663 else if (TREE_CODE (type) == ARRAY_TYPE)
4664 return reshape_init_array (type, d);
4665 else if (TREE_CODE (type) == VECTOR_TYPE)
4666 return reshape_init_vector (type, d);
4671 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
4672 brace-enclosed aggregate initializer.
4674 INIT is the CONSTRUCTOR containing the list of initializers describing
4675 a brace-enclosed initializer for an entity of the indicated aggregate TYPE.
4676 It may not presently match the shape of the TYPE; for example:
4678 struct S { int a; int b; };
4679 struct S a[] = { 1, 2, 3, 4 };
4681 Here INIT will hold a VEC of four elements, rather than a
4682 VEC of two elements, each itself a VEC of two elements. This
4683 routine transforms INIT from the former form into the latter. The
4684 revised CONSTRUCTOR node is returned. */
4687 reshape_init (tree type, tree init)
4689 VEC(constructor_elt, gc) *v;
4693 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init));
4695 v = CONSTRUCTOR_ELTS (init);
4697 /* An empty constructor does not need reshaping, and it is always a valid
4699 if (VEC_empty (constructor_elt, v))
4702 /* Recurse on this CONSTRUCTOR. */
4703 d.cur = VEC_index (constructor_elt, v, 0);
4704 d.end = d.cur + VEC_length (constructor_elt, v);
4706 new_init = reshape_init_r (type, &d, true);
4707 if (new_init == error_mark_node)
4708 return error_mark_node;
4710 /* Make sure all the element of the constructor were used. Otherwise,
4711 issue an error about exceeding initializers. */
4713 error ("too many initializers for %qT", type);
4718 /* Verify INIT (the initializer for DECL), and record the
4719 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
4720 grok_reference_init.
4722 If the return value is non-NULL, it is an expression that must be
4723 evaluated dynamically to initialize DECL. */
4726 check_initializer (tree decl, tree init, int flags, tree *cleanup)
4728 tree type = TREE_TYPE (decl);
4729 tree init_code = NULL;
4731 /* Things that are going to be initialized need to have complete
4733 TREE_TYPE (decl) = type = complete_type (TREE_TYPE (decl));
4735 if (type == error_mark_node)
4736 /* We will have already complained. */
4739 if (TREE_CODE (type) == ARRAY_TYPE)
4741 tree element_type = TREE_TYPE (type);
4743 /* The array type itself need not be complete, because the
4744 initializer may tell us how many elements are in the array.
4745 But, the elements of the array must be complete. */
4746 if (!COMPLETE_TYPE_P (complete_type (element_type)))
4748 error ("elements of array %q#D have incomplete type", decl);
4751 /* It is not valid to initialize a VLA. */
4753 && ((COMPLETE_TYPE_P (type) && !TREE_CONSTANT (TYPE_SIZE (type)))
4754 || !TREE_CONSTANT (TYPE_SIZE (element_type))))
4756 error ("variable-sized object %qD may not be initialized", decl);
4760 else if (!COMPLETE_TYPE_P (type))
4762 error ("%qD has incomplete type", decl);
4763 TREE_TYPE (decl) = error_mark_node;
4767 /* There is no way to make a variable-sized class type in GNU C++. */
4768 gcc_assert (TREE_CONSTANT (TYPE_SIZE (type)));
4770 if (!CP_AGGREGATE_TYPE_P (type)
4771 && init && BRACE_ENCLOSED_INITIALIZER_P (init)
4772 && VEC_length (constructor_elt, CONSTRUCTOR_ELTS (init)) != 1)
4774 error ("scalar object %qD requires one element in initializer", decl);
4775 TREE_TYPE (decl) = error_mark_node;
4779 if (TREE_CODE (decl) == CONST_DECL)
4781 gcc_assert (TREE_CODE (type) != REFERENCE_TYPE);
4783 DECL_INITIAL (decl) = init;
4785 gcc_assert (init != NULL_TREE);
4788 else if (!DECL_EXTERNAL (decl) && TREE_CODE (type) == REFERENCE_TYPE)
4789 init = grok_reference_init (decl, type, init, cleanup);
4792 /* Do not reshape constructors of vectors (they don't need to be
4794 if (TREE_CODE (init) == CONSTRUCTOR
4795 && !COMPOUND_LITERAL_P (init)
4796 && !TREE_TYPE (init)) /* ptrmemfunc */
4798 init = reshape_init (type, init);
4800 if ((*targetm.vector_opaque_p) (type))
4802 error ("opaque vector types cannot be initialized");
4803 init = error_mark_node;
4807 /* If DECL has an array type without a specific bound, deduce the
4808 array size from the initializer. */
4809 maybe_deduce_size_from_array_init (decl, init);
4810 type = TREE_TYPE (decl);
4811 if (type == error_mark_node)
4814 if (TYPE_HAS_CONSTRUCTOR (type) || TYPE_NEEDS_CONSTRUCTING (type))
4816 if (TREE_CODE (type) == ARRAY_TYPE)
4817 goto initialize_aggr;
4818 else if (TREE_CODE (init) == CONSTRUCTOR)
4820 if (TYPE_NON_AGGREGATE_CLASS (type))
4822 error ("%qD must be initialized by constructor, "
4825 init = error_mark_node;
4828 goto dont_use_constructor;
4832 int saved_stmts_are_full_exprs_p;
4835 saved_stmts_are_full_exprs_p = 0;
4836 if (building_stmt_tree ())
4838 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
4839 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
4841 init = build_aggr_init (decl, init, flags);
4842 if (building_stmt_tree ())
4843 current_stmt_tree ()->stmts_are_full_exprs_p =
4844 saved_stmts_are_full_exprs_p;
4850 dont_use_constructor:
4851 if (TREE_CODE (init) != TREE_VEC)
4853 init_code = store_init_value (decl, init);
4854 if (pedantic && TREE_CODE (type) == ARRAY_TYPE
4855 && DECL_INITIAL (decl)
4856 && TREE_CODE (DECL_INITIAL (decl)) == STRING_CST
4857 && PAREN_STRING_LITERAL_P (DECL_INITIAL (decl)))
4858 warning (0, "array %qD initialized by parenthesized string literal %qE",
4859 decl, DECL_INITIAL (decl));
4864 else if (DECL_EXTERNAL (decl))
4866 else if (TYPE_P (type) && TYPE_NEEDS_CONSTRUCTING (type))
4867 goto initialize_aggr;
4868 else if (IS_AGGR_TYPE (type))
4870 tree core_type = strip_array_types (type);
4872 if (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type))
4873 error ("structure %qD with uninitialized const members", decl);
4874 if (CLASSTYPE_REF_FIELDS_NEED_INIT (core_type))
4875 error ("structure %qD with uninitialized reference members", decl);
4877 check_for_uninitialized_const_var (decl);
4880 check_for_uninitialized_const_var (decl);
4882 if (init && init != error_mark_node)
4883 init_code = build2 (INIT_EXPR, type, decl, init);
4888 /* If DECL is not a local variable, give it RTL. */
4891 make_rtl_for_nonlocal_decl (tree decl, tree init, const char* asmspec)
4893 int toplev = toplevel_bindings_p ();
4895 const char *filename;
4897 /* Set the DECL_ASSEMBLER_NAME for the object. */
4900 /* The `register' keyword, when used together with an
4901 asm-specification, indicates that the variable should be
4902 placed in a particular register. */
4903 if (TREE_CODE (decl) == VAR_DECL && DECL_REGISTER (decl))
4905 set_user_assembler_name (decl, asmspec);
4906 DECL_HARD_REGISTER (decl) = 1;
4910 if (TREE_CODE (decl) == FUNCTION_DECL
4911 && DECL_BUILT_IN_CLASS (decl) == BUILT_IN_NORMAL)
4912 set_builtin_user_assembler_name (decl, asmspec);
4913 set_user_assembler_name (decl, asmspec);
4917 /* Handle non-variables up front. */
4918 if (TREE_CODE (decl) != VAR_DECL)
4920 rest_of_decl_compilation (decl, toplev, at_eof);
4924 /* If we see a class member here, it should be a static data
4926 if (DECL_LANG_SPECIFIC (decl) && DECL_IN_AGGR_P (decl))
4928 gcc_assert (TREE_STATIC (decl));
4929 /* An in-class declaration of a static data member should be
4930 external; it is only a declaration, and not a definition. */
4931 if (init == NULL_TREE)
4932 gcc_assert (DECL_EXTERNAL (decl));
4935 /* We don't create any RTL for local variables. */
4936 if (DECL_FUNCTION_SCOPE_P (decl) && !TREE_STATIC (decl))
4939 /* We defer emission of local statics until the corresponding
4940 DECL_EXPR is expanded. */
4941 defer_p = DECL_FUNCTION_SCOPE_P (decl) || DECL_VIRTUAL_P (decl);
4943 /* We try to defer namespace-scope static constants so that they are
4944 not emitted into the object file unnecessarily. */
4945 filename = input_filename;
4946 if (!DECL_VIRTUAL_P (decl)
4947 && TREE_READONLY (decl)
4948 && DECL_INITIAL (decl) != NULL_TREE
4949 && DECL_INITIAL (decl) != error_mark_node
4951 && ! EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl))
4953 && !TREE_PUBLIC (decl))
4955 /* Fool with the linkage of static consts according to #pragma
4957 struct c_fileinfo *finfo = get_fileinfo (filename);
4958 if (!finfo->interface_unknown && !TREE_PUBLIC (decl))
4960 TREE_PUBLIC (decl) = 1;
4961 DECL_EXTERNAL (decl) = finfo->interface_only;
4966 /* Likewise for template instantiations. */
4967 else if (DECL_LANG_SPECIFIC (decl)
4968 && DECL_IMPLICIT_INSTANTIATION (decl))
4971 /* If we're not deferring, go ahead and assemble the variable. */
4973 rest_of_decl_compilation (decl, toplev, at_eof);
4976 /* Generate code to initialize DECL (a local variable). */
4979 initialize_local_var (tree decl, tree init)
4981 tree type = TREE_TYPE (decl);
4984 gcc_assert (TREE_CODE (decl) == VAR_DECL
4985 || TREE_CODE (decl) == RESULT_DECL);
4986 gcc_assert (!TREE_STATIC (decl));
4988 if (DECL_SIZE (decl) == NULL_TREE)
4990 /* If we used it already as memory, it must stay in memory. */
4991 DECL_INITIAL (decl) = NULL_TREE;
4992 TREE_ADDRESSABLE (decl) = TREE_USED (decl);
4995 if (DECL_SIZE (decl) && type != error_mark_node)
4999 /* Compute and store the initial value. */
5000 already_used = TREE_USED (decl) || TREE_USED (type);
5002 /* Perform the initialization. */
5005 int saved_stmts_are_full_exprs_p;
5007 gcc_assert (building_stmt_tree ());
5008 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
5009 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
5010 finish_expr_stmt (init);
5011 current_stmt_tree ()->stmts_are_full_exprs_p =
5012 saved_stmts_are_full_exprs_p;
5015 /* Set this to 0 so we can tell whether an aggregate which was
5016 initialized was ever used. Don't do this if it has a
5017 destructor, so we don't complain about the 'resource
5018 allocation is initialization' idiom. Now set
5019 attribute((unused)) on types so decls of that type will be
5020 marked used. (see TREE_USED, above.) */
5021 if (TYPE_NEEDS_CONSTRUCTING (type)
5023 && TYPE_HAS_TRIVIAL_DESTRUCTOR (type)
5024 && DECL_NAME (decl))
5025 TREE_USED (decl) = 0;
5026 else if (already_used)
5027 TREE_USED (decl) = 1;
5030 /* Generate a cleanup, if necessary. */
5031 cleanup = cxx_maybe_build_cleanup (decl);
5032 if (DECL_SIZE (decl) && cleanup)
5033 finish_decl_cleanup (decl, cleanup);
5036 /* DECL is a VAR_DECL for a compiler-generated variable with static
5037 storage duration (like a virtual table) whose initializer is a
5038 compile-time constant. INIT must be either a TREE_LIST of values,
5039 or a CONSTRUCTOR. Initialize the variable and provide it to the
5043 initialize_artificial_var (tree decl, tree init)
5045 gcc_assert (DECL_ARTIFICIAL (decl));
5046 if (TREE_CODE (init) == TREE_LIST)
5047 init = build_constructor_from_list (NULL_TREE, init);
5048 gcc_assert (TREE_CODE (init) == CONSTRUCTOR);
5049 DECL_INITIAL (decl) = init;
5050 DECL_INITIALIZED_P (decl) = 1;
5051 determine_visibility (decl);
5052 layout_var_decl (decl);
5053 maybe_commonize_var (decl);
5054 make_rtl_for_nonlocal_decl (decl, init, /*asmspec=*/NULL);
5057 /* Finish processing of a declaration;
5058 install its line number and initial value.
5059 If the length of an array type is not known before,
5060 it must be determined now, from the initial value, or it is an error.
5062 INIT is the initializer (if any) for DECL. If INIT_CONST_EXPR_P is
5063 true, then INIT is an integral constant expression.
5065 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
5066 if the (init) syntax was used. */
5069 cp_finish_decl (tree decl, tree init, bool init_const_expr_p,
5070 tree asmspec_tree, int flags)
5074 const char *asmspec = NULL;
5075 int was_readonly = 0;
5076 bool var_definition_p = false;
5077 int saved_processing_template_decl;
5079 if (decl == error_mark_node)
5084 error ("assignment (not initialization) in declaration");
5088 gcc_assert (TREE_CODE (decl) != RESULT_DECL);
5089 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
5090 gcc_assert (TREE_CODE (decl) != PARM_DECL);
5092 type = TREE_TYPE (decl);
5093 if (type == error_mark_node)
5096 /* Assume no cleanup is required. */
5097 cleanup = NULL_TREE;
5098 saved_processing_template_decl = processing_template_decl;
5100 /* If a name was specified, get the string. */
5101 if (global_scope_p (current_binding_level))
5102 asmspec_tree = maybe_apply_renaming_pragma (decl, asmspec_tree);
5103 if (asmspec_tree && asmspec_tree != error_mark_node)
5104 asmspec = TREE_STRING_POINTER (asmspec_tree);
5106 if (current_class_type
5107 && CP_DECL_CONTEXT (decl) == current_class_type
5108 && TYPE_BEING_DEFINED (current_class_type)
5109 && (DECL_INITIAL (decl) || init))
5110 DECL_INITIALIZED_IN_CLASS_P (decl) = 1;
5112 if (processing_template_decl)
5114 bool type_dependent_p;
5116 /* Add this declaration to the statement-tree. */
5117 if (at_function_scope_p ())
5118 add_decl_expr (decl);
5120 type_dependent_p = dependent_type_p (type);
5122 if (init && init_const_expr_p)
5124 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl) = 1;
5125 if (DECL_INTEGRAL_CONSTANT_VAR_P (decl))
5126 TREE_CONSTANT (decl) = 1;
5130 || !DECL_CLASS_SCOPE_P (decl)
5131 || !DECL_INTEGRAL_CONSTANT_VAR_P (decl)
5133 || value_dependent_expression_p (init)
5134 /* Check also if initializer is a value dependent
5135 { integral_constant_expression }. */
5136 || (TREE_CODE (init) == CONSTRUCTOR
5137 && VEC_length (constructor_elt, CONSTRUCTOR_ELTS (init)) == 1
5138 && value_dependent_expression_p
5139 (VEC_index (constructor_elt,
5140 CONSTRUCTOR_ELTS (init), 0)->value)))
5143 DECL_INITIAL (decl) = init;
5144 if (TREE_CODE (decl) == VAR_DECL
5145 && !DECL_PRETTY_FUNCTION_P (decl)
5146 && !type_dependent_p)
5147 maybe_deduce_size_from_array_init (decl, init);
5151 init = fold_non_dependent_expr (init);
5152 processing_template_decl = 0;
5155 /* Take care of TYPE_DECLs up front. */
5156 if (TREE_CODE (decl) == TYPE_DECL)
5158 if (type != error_mark_node
5159 && IS_AGGR_TYPE (type) && DECL_NAME (decl))
5161 if (TREE_TYPE (DECL_NAME (decl)) && TREE_TYPE (decl) != type)
5162 warning (0, "shadowing previous type declaration of %q#D", decl);
5163 set_identifier_type_value (DECL_NAME (decl), decl);
5166 /* If we have installed this as the canonical typedef for this
5167 type, and that type has not been defined yet, delay emitting
5168 the debug information for it, as we will emit it later. */
5169 if (TYPE_MAIN_DECL (TREE_TYPE (decl)) == decl
5170 && !COMPLETE_TYPE_P (TREE_TYPE (decl)))
5171 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
5173 rest_of_decl_compilation (decl, DECL_CONTEXT (decl) == NULL_TREE,
5178 /* A reference will be modified here, as it is initialized. */
5179 if (! DECL_EXTERNAL (decl)
5180 && TREE_READONLY (decl)
5181 && TREE_CODE (type) == REFERENCE_TYPE)
5184 TREE_READONLY (decl) = 0;
5187 if (TREE_CODE (decl) == VAR_DECL)
5189 /* Only PODs can have thread-local storage. Other types may require
5190 various kinds of non-trivial initialization. */
5191 if (DECL_THREAD_LOCAL_P (decl) && !pod_type_p (TREE_TYPE (decl)))
5192 error ("%qD cannot be thread-local because it has non-POD type %qT",
5193 decl, TREE_TYPE (decl));
5194 /* If this is a local variable that will need a mangled name,
5195 register it now. We must do this before processing the
5196 initializer for the variable, since the initialization might
5197 require a guard variable, and since the mangled name of the
5198 guard variable will depend on the mangled name of this
5200 if (!processing_template_decl
5201 && DECL_FUNCTION_SCOPE_P (decl)
5202 && TREE_STATIC (decl)
5203 && !DECL_ARTIFICIAL (decl))
5204 push_local_name (decl);
5205 /* Convert the initializer to the type of DECL, if we have not
5206 already initialized DECL. */
5207 if (!DECL_INITIALIZED_P (decl)
5208 /* If !DECL_EXTERNAL then DECL is being defined. In the
5209 case of a static data member initialized inside the
5210 class-specifier, there can be an initializer even if DECL
5211 is *not* defined. */
5212 && (!DECL_EXTERNAL (decl) || init))
5216 DECL_NONTRIVIALLY_INITIALIZED_P (decl) = 1;
5217 if (init_const_expr_p)
5219 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl) = 1;
5220 if (DECL_INTEGRAL_CONSTANT_VAR_P (decl))
5221 TREE_CONSTANT (decl) = 1;
5224 init = check_initializer (decl, init, flags, &cleanup);
5225 /* Thread-local storage cannot be dynamically initialized. */
5226 if (DECL_THREAD_LOCAL_P (decl) && init)
5228 error ("%qD is thread-local and so cannot be dynamically "
5229 "initialized", decl);
5233 /* Check that the initializer for a static data member was a
5234 constant. Although we check in the parser that the
5235 initializer is an integral constant expression, we do not
5236 simplify division-by-zero at the point at which it
5237 occurs. Therefore, in:
5239 struct S { static const int i = 7 / 0; };
5241 we issue an error at this point. It would
5242 probably be better to forbid division by zero in
5243 integral constant expressions. */
5244 if (DECL_EXTERNAL (decl) && init)
5246 error ("%qD cannot be initialized by a non-constant expression"
5247 " when being declared", decl);
5248 DECL_INITIALIZED_IN_CLASS_P (decl) = 0;
5256 The memory occupied by any object of static storage
5257 duration is zero-initialized at program startup before
5258 any other initialization takes place.
5260 We cannot create an appropriate initializer until after
5261 the type of DECL is finalized. If DECL_INITIAL is set,
5262 then the DECL is statically initialized, and any
5263 necessary zero-initialization has already been performed. */
5264 if (TREE_STATIC (decl) && !DECL_INITIAL (decl))
5265 DECL_INITIAL (decl) = build_zero_init (TREE_TYPE (decl),
5266 /*nelts=*/NULL_TREE,
5267 /*static_storage_p=*/true);
5268 /* Remember that the initialization for this variable has
5270 DECL_INITIALIZED_P (decl) = 1;
5271 /* This declaration is the definition of this variable,
5272 unless we are initializing a static data member within
5273 the class specifier. */
5274 if (!DECL_EXTERNAL (decl))
5275 var_definition_p = true;
5277 /* If the variable has an array type, lay out the type, even if
5278 there is no initializer. It is valid to index through the
5279 array, and we must get TYPE_ALIGN set correctly on the array
5281 else if (TREE_CODE (type) == ARRAY_TYPE)
5285 /* Add this declaration to the statement-tree. This needs to happen
5286 after the call to check_initializer so that the DECL_EXPR for a
5287 reference temp is added before the DECL_EXPR for the reference itself. */
5288 if (at_function_scope_p ())
5289 add_decl_expr (decl);
5291 /* Let the middle end know about variables and functions -- but not
5292 static data members in uninstantiated class templates. */
5293 if (!saved_processing_template_decl
5294 && (TREE_CODE (decl) == VAR_DECL
5295 || TREE_CODE (decl) == FUNCTION_DECL))
5297 if (TREE_CODE (decl) == VAR_DECL)
5299 layout_var_decl (decl);
5300 maybe_commonize_var (decl);
5303 make_rtl_for_nonlocal_decl (decl, init, asmspec);
5305 /* Check for abstractness of the type. Notice that there is no
5306 need to strip array types here since the check for those types
5307 is already done within create_array_type_for_decl. */
5308 if (TREE_CODE (type) == FUNCTION_TYPE
5309 || TREE_CODE (type) == METHOD_TYPE)
5310 abstract_virtuals_error (decl, TREE_TYPE (type));
5312 abstract_virtuals_error (decl, type);
5314 /* This needs to happen after the linkage is set. */
5315 determine_visibility (decl);
5317 if (TREE_CODE (decl) == FUNCTION_DECL
5318 || TREE_TYPE (decl) == error_mark_node)
5319 /* No initialization required. */
5321 else if (DECL_EXTERNAL (decl)
5322 && ! (DECL_LANG_SPECIFIC (decl)
5323 && DECL_NOT_REALLY_EXTERN (decl)))
5326 DECL_INITIAL (decl) = init;
5330 /* A variable definition. */
5331 if (DECL_FUNCTION_SCOPE_P (decl))
5333 /* Initialize the local variable. */
5334 if (processing_template_decl)
5335 DECL_INITIAL (decl) = init;
5336 else if (!TREE_STATIC (decl))
5337 initialize_local_var (decl, init);
5340 /* If a variable is defined, and then a subsequent
5341 definition with external linkage is encountered, we will
5342 get here twice for the same variable. We want to avoid
5343 calling expand_static_init more than once. For variables
5344 that are not static data members, we can call
5345 expand_static_init only when we actually process the
5346 initializer. It is not legal to redeclare a static data
5347 member, so this issue does not arise in that case. */
5348 if (var_definition_p && TREE_STATIC (decl))
5349 expand_static_init (decl, init);
5353 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
5354 reference, insert it in the statement-tree now. */
5356 push_cleanup (decl, cleanup, false);
5359 processing_template_decl = saved_processing_template_decl;
5362 TREE_READONLY (decl) = 1;
5364 /* If this was marked 'used', be sure it will be output. */
5365 if (lookup_attribute ("used", DECL_ATTRIBUTES (decl)))
5366 mark_decl_referenced (decl);
5369 /* This is here for a midend callback from c-common.c. */
5372 finish_decl (tree decl, tree init, tree asmspec_tree)
5374 cp_finish_decl (decl, init, /*init_const_expr_p=*/false, asmspec_tree, 0);
5377 /* Returns a declaration for a VAR_DECL as if:
5379 extern "C" TYPE NAME;
5381 had been seen. Used to create compiler-generated global
5385 declare_global_var (tree name, tree type)
5389 push_to_top_level ();
5390 decl = build_decl (VAR_DECL, name, type);
5391 TREE_PUBLIC (decl) = 1;
5392 DECL_EXTERNAL (decl) = 1;
5393 DECL_ARTIFICIAL (decl) = 1;
5394 /* If the user has explicitly declared this variable (perhaps
5395 because the code we are compiling is part of a low-level runtime
5396 library), then it is possible that our declaration will be merged
5397 with theirs by pushdecl. */
5398 decl = pushdecl (decl);
5399 finish_decl (decl, NULL_TREE, NULL_TREE);
5400 pop_from_top_level ();
5405 /* Returns a pointer to the `atexit' function. Note that if
5406 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
5407 `__cxa_atexit' function specified in the IA64 C++ ABI. */
5410 get_atexit_node (void)
5417 bool use_aeabi_atexit;
5422 if (flag_use_cxa_atexit && !targetm.cxx.use_atexit_for_cxa_atexit ())
5424 /* The declaration for `__cxa_atexit' is:
5426 int __cxa_atexit (void (*)(void *), void *, void *)
5428 We build up the argument types and then then function type
5431 use_aeabi_atexit = targetm.cxx.use_aeabi_atexit ();
5432 /* First, build the pointer-to-function type for the first
5434 arg_types = tree_cons (NULL_TREE, ptr_type_node, void_list_node);
5435 fn_type = build_function_type (void_type_node, arg_types);
5436 fn_ptr_type = build_pointer_type (fn_type);
5437 /* Then, build the rest of the argument types. */
5438 arg_types = tree_cons (NULL_TREE, ptr_type_node, void_list_node);
5439 if (use_aeabi_atexit)
5441 arg_types = tree_cons (NULL_TREE, fn_ptr_type, arg_types);
5442 arg_types = tree_cons (NULL_TREE, ptr_type_node, arg_types);
5446 arg_types = tree_cons (NULL_TREE, ptr_type_node, arg_types);
5447 arg_types = tree_cons (NULL_TREE, fn_ptr_type, arg_types);
5449 /* And the final __cxa_atexit type. */
5450 fn_type = build_function_type (integer_type_node, arg_types);
5451 fn_ptr_type = build_pointer_type (fn_type);
5452 if (use_aeabi_atexit)
5453 name = "__aeabi_atexit";
5455 name = "__cxa_atexit";
5459 /* The declaration for `atexit' is:
5461 int atexit (void (*)());
5463 We build up the argument types and then then function type
5465 fn_type = build_function_type (void_type_node, void_list_node);
5466 fn_ptr_type = build_pointer_type (fn_type);
5467 arg_types = tree_cons (NULL_TREE, fn_ptr_type, void_list_node);
5468 /* Build the final atexit type. */
5469 fn_type = build_function_type (integer_type_node, arg_types);
5473 /* Now, build the function declaration. */
5474 push_lang_context (lang_name_c);
5475 atexit_fndecl = build_library_fn_ptr (name, fn_type);
5476 mark_used (atexit_fndecl);
5477 pop_lang_context ();
5478 atexit_node = decay_conversion (atexit_fndecl);
5483 /* Returns the __dso_handle VAR_DECL. */
5486 get_dso_handle_node (void)
5488 if (dso_handle_node)
5489 return dso_handle_node;
5491 /* Declare the variable. */
5492 dso_handle_node = declare_global_var (get_identifier ("__dso_handle"),
5495 return dso_handle_node;
5498 /* Begin a new function with internal linkage whose job will be simply
5499 to destroy some particular variable. */
5501 static GTY(()) int start_cleanup_cnt;
5504 start_cleanup_fn (void)
5510 bool use_cxa_atexit = flag_use_cxa_atexit
5511 && !targetm.cxx.use_atexit_for_cxa_atexit ();
5513 push_to_top_level ();
5515 /* No need to mangle this. */
5516 push_lang_context (lang_name_c);
5518 /* Build the parameter-types. */
5519 parmtypes = void_list_node;
5520 /* Functions passed to __cxa_atexit take an additional parameter.
5521 We'll just ignore it. After we implement the new calling
5522 convention for destructors, we can eliminate the use of
5523 additional cleanup functions entirely in the -fnew-abi case. */
5525 parmtypes = tree_cons (NULL_TREE, ptr_type_node, parmtypes);
5526 /* Build the function type itself. */
5527 fntype = build_function_type (void_type_node, parmtypes);
5528 /* Build the name of the function. */
5529 sprintf (name, "__tcf_%d", start_cleanup_cnt++);
5530 /* Build the function declaration. */
5531 fndecl = build_lang_decl (FUNCTION_DECL, get_identifier (name), fntype);
5532 /* It's a function with internal linkage, generated by the
5534 TREE_PUBLIC (fndecl) = 0;
5535 DECL_ARTIFICIAL (fndecl) = 1;
5536 /* Make the function `inline' so that it is only emitted if it is
5537 actually needed. It is unlikely that it will be inlined, since
5538 it is only called via a function pointer, but we avoid unnecessary
5539 emissions this way. */
5540 DECL_INLINE (fndecl) = 1;
5541 DECL_DECLARED_INLINE_P (fndecl) = 1;
5542 DECL_INTERFACE_KNOWN (fndecl) = 1;
5543 /* Build the parameter. */
5548 parmdecl = cp_build_parm_decl (NULL_TREE, ptr_type_node);
5549 DECL_CONTEXT (parmdecl) = fndecl;
5550 TREE_USED (parmdecl) = 1;
5551 DECL_ARGUMENTS (fndecl) = parmdecl;
5555 start_preparsed_function (fndecl, NULL_TREE, SF_PRE_PARSED);
5557 pop_lang_context ();
5559 return current_function_decl;
5562 /* Finish the cleanup function begun by start_cleanup_fn. */
5565 end_cleanup_fn (void)
5567 expand_or_defer_fn (finish_function (0));
5569 pop_from_top_level ();
5572 /* Generate code to handle the destruction of DECL, an object with
5573 static storage duration. */
5576 register_dtor_fn (tree decl)
5583 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
5584 return void_zero_node;
5586 /* Call build_cleanup before we enter the anonymous function so that
5587 any access checks will be done relative to the current scope,
5588 rather than the scope of the anonymous function. */
5589 build_cleanup (decl);
5591 /* Now start the function. */
5592 cleanup = start_cleanup_fn ();
5594 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
5595 to the original function, rather than the anonymous one. That
5596 will make the back end think that nested functions are in use,
5597 which causes confusion. */
5599 push_deferring_access_checks (dk_no_check);
5600 fcall = build_cleanup (decl);
5601 pop_deferring_access_checks ();
5603 /* Create the body of the anonymous function. */
5604 compound_stmt = begin_compound_stmt (BCS_FN_BODY);
5605 finish_expr_stmt (fcall);
5606 finish_compound_stmt (compound_stmt);
5609 /* Call atexit with the cleanup function. */
5610 cxx_mark_addressable (cleanup);
5611 mark_used (cleanup);
5612 cleanup = build_unary_op (ADDR_EXPR, cleanup, 0);
5613 if (flag_use_cxa_atexit && !targetm.cxx.use_atexit_for_cxa_atexit ())
5615 args = tree_cons (NULL_TREE,
5616 build_unary_op (ADDR_EXPR, get_dso_handle_node (), 0),
5618 if (targetm.cxx.use_aeabi_atexit ())
5620 args = tree_cons (NULL_TREE, cleanup, args);
5621 args = tree_cons (NULL_TREE, null_pointer_node, args);
5625 args = tree_cons (NULL_TREE, null_pointer_node, args);
5626 args = tree_cons (NULL_TREE, cleanup, args);
5630 args = tree_cons (NULL_TREE, cleanup, NULL_TREE);
5631 return build_function_call (get_atexit_node (), args);
5634 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
5635 is its initializer. Generate code to handle the construction
5636 and destruction of DECL. */
5639 expand_static_init (tree decl, tree init)
5641 gcc_assert (TREE_CODE (decl) == VAR_DECL);
5642 gcc_assert (TREE_STATIC (decl));
5644 /* Some variables require no initialization. */
5646 && !TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl))
5647 && TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
5650 if (DECL_FUNCTION_SCOPE_P (decl))
5652 /* Emit code to perform this initialization but once. */
5653 tree if_stmt = NULL_TREE, inner_if_stmt = NULL_TREE;
5654 tree then_clause = NULL_TREE, inner_then_clause = NULL_TREE;
5655 tree guard, guard_addr;
5656 tree acquire_fn, release_fn, abort_fn;
5659 /* Emit code to perform this initialization but once. This code
5662 static <type> guard;
5663 if (!guard.first_byte) {
5664 if (__cxa_guard_acquire (&guard)) {
5667 // Do initialization.
5668 flag = true; __cxa_guard_release (&guard);
5669 // Register variable for destruction at end of program.
5671 if (!flag) __cxa_guard_abort (&guard);
5675 Note that the `flag' variable is only set to 1 *after* the
5676 initialization is complete. This ensures that an exception,
5677 thrown during the construction, will cause the variable to
5678 reinitialized when we pass through this code again, as per:
5682 If the initialization exits by throwing an exception, the
5683 initialization is not complete, so it will be tried again
5684 the next time control enters the declaration.
5686 This process should be thread-safe, too; multiple threads
5687 should not be able to initialize the variable more than
5690 /* Create the guard variable. */
5691 guard = get_guard (decl);
5693 /* This optimization isn't safe on targets with relaxed memory
5694 consistency. On such targets we force synchronization in
5695 __cxa_guard_acquire. */
5696 if (!targetm.relaxed_ordering || !flag_threadsafe_statics)
5698 /* Begin the conditional initialization. */
5699 if_stmt = begin_if_stmt ();
5700 finish_if_stmt_cond (get_guard_cond (guard), if_stmt);
5701 then_clause = begin_compound_stmt (BCS_NO_SCOPE);
5704 if (flag_threadsafe_statics)
5706 guard_addr = build_address (guard);
5708 acquire_fn = get_identifier ("__cxa_guard_acquire");
5709 release_fn = get_identifier ("__cxa_guard_release");
5710 abort_fn = get_identifier ("__cxa_guard_abort");
5711 if (!get_global_value_if_present (acquire_fn, &acquire_fn))
5713 tree argtypes = tree_cons (NULL_TREE, TREE_TYPE (guard_addr),
5715 tree vfntype = build_function_type (void_type_node, argtypes);
5716 acquire_fn = push_library_fn
5717 (acquire_fn, build_function_type (integer_type_node, argtypes));
5718 release_fn = push_library_fn (release_fn, vfntype);
5719 abort_fn = push_library_fn (abort_fn, vfntype);
5723 release_fn = identifier_global_value (release_fn);
5724 abort_fn = identifier_global_value (abort_fn);
5727 inner_if_stmt = begin_if_stmt ();
5728 finish_if_stmt_cond (build_call_n (acquire_fn, 1, guard_addr),
5731 inner_then_clause = begin_compound_stmt (BCS_NO_SCOPE);
5732 begin = get_target_expr (boolean_false_node);
5733 flag = TARGET_EXPR_SLOT (begin);
5735 TARGET_EXPR_CLEANUP (begin)
5736 = build3 (COND_EXPR, void_type_node, flag,
5738 build_call_n (abort_fn, 1, guard_addr));
5739 CLEANUP_EH_ONLY (begin) = 1;
5741 /* Do the initialization itself. */
5742 init = add_stmt_to_compound (begin, init);
5743 init = add_stmt_to_compound
5744 (init, build2 (MODIFY_EXPR, void_type_node, flag, boolean_true_node));
5745 init = add_stmt_to_compound
5746 (init, build_call_n (release_fn, 1, guard_addr));
5749 init = add_stmt_to_compound (init, set_guard (guard));
5751 /* Use atexit to register a function for destroying this static
5753 init = add_stmt_to_compound (init, register_dtor_fn (decl));
5755 finish_expr_stmt (init);
5757 if (flag_threadsafe_statics)
5759 finish_compound_stmt (inner_then_clause);
5760 finish_then_clause (inner_if_stmt);
5761 finish_if_stmt (inner_if_stmt);
5764 if (!targetm.relaxed_ordering || !flag_threadsafe_statics)
5766 finish_compound_stmt (then_clause);
5767 finish_then_clause (if_stmt);
5768 finish_if_stmt (if_stmt);
5772 static_aggregates = tree_cons (init, decl, static_aggregates);
5776 /* Make TYPE a complete type based on INITIAL_VALUE.
5777 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
5778 2 if there was no information (in which case assume 0 if DO_DEFAULT),
5779 3 if the initializer list is empty (in pedantic mode). */
5782 cp_complete_array_type (tree *ptype, tree initial_value, bool do_default)
5785 tree type, elt_type;
5789 /* An array of character type can be initialized from a
5790 brace-enclosed string constant.
5792 FIXME: this code is duplicated from reshape_init. Probably
5793 we should just call reshape_init here? */
5794 if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (*ptype)))
5795 && TREE_CODE (initial_value) == CONSTRUCTOR
5796 && !VEC_empty (constructor_elt, CONSTRUCTOR_ELTS (initial_value)))
5798 VEC(constructor_elt,gc) *v = CONSTRUCTOR_ELTS (initial_value);
5799 tree value = VEC_index (constructor_elt, v, 0)->value;
5801 if (TREE_CODE (value) == STRING_CST
5802 && VEC_length (constructor_elt, v) == 1)
5803 initial_value = value;
5807 failure = complete_array_type (ptype, initial_value, do_default);
5809 /* We can create the array before the element type is complete, which
5810 means that we didn't have these two bits set in the original type
5811 either. In completing the type, we are expected to propagate these
5812 bits. See also complete_type which does the same thing for arrays
5815 if (TYPE_DOMAIN (type))
5817 elt_type = TREE_TYPE (type);
5818 TYPE_NEEDS_CONSTRUCTING (type) = TYPE_NEEDS_CONSTRUCTING (elt_type);
5819 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type)
5820 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (elt_type);
5826 /* Return zero if something is declared to be a member of type
5827 CTYPE when in the context of CUR_TYPE. STRING is the error
5828 message to print in that case. Otherwise, quietly return 1. */
5831 member_function_or_else (tree ctype, tree cur_type, enum overload_flags flags)
5833 if (ctype && ctype != cur_type)
5835 if (flags == DTOR_FLAG)
5836 error ("destructor for alien class %qT cannot be a member", ctype);
5838 error ("constructor for alien class %qT cannot be a member", ctype);
5844 /* Subroutine of `grokdeclarator'. */
5846 /* Generate errors possibly applicable for a given set of specifiers.
5847 This is for ARM $7.1.2. */
5850 bad_specifiers (tree object,
5859 error ("%qD declared as a %<virtual%> %s", object, type);
5861 error ("%qD declared as an %<inline%> %s", object, type);
5863 error ("%<const%> and %<volatile%> function specifiers on "
5864 "%qD invalid in %s declaration",
5867 error ("%q+D declared as a friend", object);
5869 && (TREE_CODE (object) == TYPE_DECL
5870 || (!TYPE_PTRFN_P (TREE_TYPE (object))
5871 && !TYPE_REFFN_P (TREE_TYPE (object))
5872 && !TYPE_PTRMEMFUNC_P (TREE_TYPE (object)))))
5873 error ("%q+D declared with an exception specification", object);
5876 /* DECL is a member function or static data member and is presently
5877 being defined. Check that the definition is taking place in a
5881 check_class_member_definition_namespace (tree decl)
5883 /* These checks only apply to member functions and static data
5885 gcc_assert (TREE_CODE (decl) == FUNCTION_DECL
5886 || TREE_CODE (decl) == VAR_DECL);
5887 /* We check for problems with specializations in pt.c in
5888 check_specialization_namespace, where we can issue better
5890 if (processing_specialization)
5892 /* There are no restrictions on the placement of
5893 explicit instantiations. */
5894 if (processing_explicit_instantiation)
5898 A member function definition that appears outside of the
5899 class definition shall appear in a namespace scope enclosing
5900 the class definition.
5904 The definition for a static data member shall appear in a
5905 namespace scope enclosing the member's class definition. */
5906 if (!is_ancestor (current_namespace, DECL_CONTEXT (decl)))
5907 pedwarn ("definition of %qD is not in namespace enclosing %qT",
5908 decl, DECL_CONTEXT (decl));
5911 /* Build a PARM_DECL for the "this" parameter. TYPE is the
5912 METHOD_TYPE for a non-static member function; QUALS are the
5913 cv-qualifiers that apply to the function. */
5916 build_this_parm (tree type, cp_cv_quals quals)
5921 cp_cv_quals this_quals;
5923 this_type = TREE_VALUE (TYPE_ARG_TYPES (type));
5924 /* The `this' parameter is implicitly `const'; it cannot be
5926 this_quals = (quals & TYPE_QUAL_RESTRICT) | TYPE_QUAL_CONST;
5927 qual_type = cp_build_qualified_type (this_type, this_quals);
5928 parm = build_artificial_parm (this_identifier, qual_type);
5929 cp_apply_type_quals_to_decl (this_quals, parm);
5933 /* CTYPE is class type, or null if non-class.
5934 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
5936 DECLARATOR is the function's name.
5937 PARMS is a chain of PARM_DECLs for the function.
5938 VIRTUALP is truthvalue of whether the function is virtual or not.
5939 FLAGS are to be passed through to `grokclassfn'.
5940 QUALS are qualifiers indicating whether the function is `const'
5942 RAISES is a list of exceptions that this function can raise.
5943 CHECK is 1 if we must find this method in CTYPE, 0 if we should
5944 not look, and -1 if we should not call `grokclassfn' at all.
5946 SFK is the kind of special function (if any) for the new function.
5948 Returns `NULL_TREE' if something goes wrong, after issuing
5949 applicable error messages. */
5952 grokfndecl (tree ctype,
5956 tree orig_declarator,
5958 enum overload_flags flags,
5965 special_function_kind sfk,
5972 int staticp = ctype && TREE_CODE (type) == FUNCTION_TYPE;
5976 type = build_exception_variant (type, raises);
5978 decl = build_lang_decl (FUNCTION_DECL, declarator, type);
5979 if (TREE_CODE (type) == METHOD_TYPE)
5982 parm = build_this_parm (type, quals);
5983 TREE_CHAIN (parm) = parms;
5986 DECL_ARGUMENTS (decl) = parms;
5987 /* Propagate volatile out from type to decl. */
5988 if (TYPE_VOLATILE (type))
5989 TREE_THIS_VOLATILE (decl) = 1;
5991 /* Setup decl according to sfk. */
5994 case sfk_constructor:
5995 case sfk_copy_constructor:
5996 DECL_CONSTRUCTOR_P (decl) = 1;
5998 case sfk_destructor:
5999 DECL_DESTRUCTOR_P (decl) = 1;
6006 && TREE_CODE (orig_declarator) == TEMPLATE_ID_EXPR)
6010 ("defining explicit specialization %qD in friend declaration",
6014 tree fns = TREE_OPERAND (orig_declarator, 0);
6015 tree args = TREE_OPERAND (orig_declarator, 1);
6017 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
6019 /* Something like `template <class T> friend void f<T>()'. */
6020 error ("invalid use of template-id %qD in declaration "
6021 "of primary template",
6027 /* A friend declaration of the form friend void f<>(). Record
6028 the information in the TEMPLATE_ID_EXPR. */
6029 SET_DECL_IMPLICIT_INSTANTIATION (decl);
6031 if (TREE_CODE (fns) == COMPONENT_REF)
6033 /* Due to bison parser ickiness, we will have already looked
6034 up an operator_name or PFUNCNAME within the current class
6035 (see template_id in parse.y). If the current class contains
6036 such a name, we'll get a COMPONENT_REF here. Undo that. */
6038 gcc_assert (TREE_TYPE (TREE_OPERAND (fns, 0))
6039 == current_class_type);
6040 fns = TREE_OPERAND (fns, 1);
6042 gcc_assert (TREE_CODE (fns) == IDENTIFIER_NODE
6043 || TREE_CODE (fns) == OVERLOAD);
6044 DECL_TEMPLATE_INFO (decl) = tree_cons (fns, args, NULL_TREE);
6046 for (t = TYPE_ARG_TYPES (TREE_TYPE (decl)); t; t = TREE_CHAIN (t))
6047 if (TREE_PURPOSE (t)
6048 && TREE_CODE (TREE_PURPOSE (t)) == DEFAULT_ARG)
6050 error ("default arguments are not allowed in declaration "
6051 "of friend template specialization %qD",
6058 error ("%<inline%> is not allowed in declaration of friend "
6059 "template specialization %qD",
6066 /* If this decl has namespace scope, set that up. */
6068 set_decl_namespace (decl, in_namespace, friendp);
6070 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
6072 /* `main' and builtins have implicit 'C' linkage. */
6073 if ((MAIN_NAME_P (declarator)
6074 || (IDENTIFIER_LENGTH (declarator) > 10
6075 && IDENTIFIER_POINTER (declarator)[0] == '_'
6076 && IDENTIFIER_POINTER (declarator)[1] == '_'
6077 && strncmp (IDENTIFIER_POINTER (declarator)+2, "builtin_", 8) == 0))
6078 && current_lang_name == lang_name_cplusplus
6079 && ctype == NULL_TREE
6080 /* NULL_TREE means global namespace. */
6081 && DECL_CONTEXT (decl) == NULL_TREE)
6082 SET_DECL_LANGUAGE (decl, lang_c);
6084 /* Should probably propagate const out from type to decl I bet (mrs). */
6087 DECL_STATIC_FUNCTION_P (decl) = 1;
6088 DECL_CONTEXT (decl) = ctype;
6093 DECL_CONTEXT (decl) = ctype;
6095 check_class_member_definition_namespace (decl);
6098 if (ctype == NULL_TREE && DECL_MAIN_P (decl))
6100 if (processing_template_decl)
6101 error ("cannot declare %<::main%> to be a template");
6103 error ("cannot declare %<::main%> to be inline");
6105 error ("cannot declare %<::main%> to be static");
6110 /* Members of anonymous types and local classes have no linkage; make
6111 them internal. If a typedef is made later, this will be changed. */
6112 if (ctype && (TYPE_ANONYMOUS_P (ctype)
6113 || decl_function_context (TYPE_MAIN_DECL (ctype))))
6118 /* [basic.link]: A name with no linkage (notably, the name of a class
6119 or enumeration declared in a local scope) shall not be used to
6120 declare an entity with linkage.
6122 Only check this for public decls for now. See core 319, 389. */
6123 t = no_linkage_check (TREE_TYPE (decl),
6124 /*relaxed_p=*/false);
6127 if (TYPE_ANONYMOUS_P (t))
6129 if (DECL_EXTERN_C_P (decl))
6130 /* Allow this; it's pretty common in C. */;
6133 pedwarn ("non-local function %q#D uses anonymous type",
6135 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
6136 pedwarn ("%q+#D does not refer to the unqualified "
6137 "type, so it is not used for linkage",
6142 pedwarn ("non-local function %q#D uses local type %qT", decl, t);
6146 TREE_PUBLIC (decl) = publicp;
6149 DECL_INTERFACE_KNOWN (decl) = 1;
6150 DECL_NOT_REALLY_EXTERN (decl) = 1;
6153 /* If the declaration was declared inline, mark it as such. */
6155 DECL_DECLARED_INLINE_P (decl) = 1;
6156 /* We inline functions that are explicitly declared inline, or, when
6157 the user explicitly asks us to, all functions. */
6158 if (DECL_DECLARED_INLINE_P (decl)
6159 || (flag_inline_trees == 2 && !DECL_INLINE (decl) && funcdef_flag))
6160 DECL_INLINE (decl) = 1;
6162 DECL_EXTERNAL (decl) = 1;
6163 if (quals && TREE_CODE (type) == FUNCTION_TYPE)
6166 ? G_("static member function %qD cannot have cv-qualifier")
6167 : G_("non-member function %qD cannot have cv-qualifier"),
6169 quals = TYPE_UNQUALIFIED;
6172 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl))
6173 && !grok_op_properties (decl, /*complain=*/true))
6176 if (ctype && decl_function_context (decl))
6177 DECL_NO_STATIC_CHAIN (decl) = 1;
6180 /* Make the init_value nonzero so pushdecl knows this is not
6181 tentative. error_mark_node is replaced later with the BLOCK. */
6182 DECL_INITIAL (decl) = error_mark_node;
6184 if (TYPE_NOTHROW_P (type) || nothrow_libfn_p (decl))
6185 TREE_NOTHROW (decl) = 1;
6187 /* Caller will do the rest of this. */
6191 if (ctype != NULL_TREE)
6192 grokclassfn (ctype, decl, flags);
6194 decl = check_explicit_specialization (orig_declarator, decl,
6197 4 * (friendp != 0));
6198 if (decl == error_mark_node)
6203 cplus_decl_attributes (&decl, *attrlist, 0);
6204 *attrlist = NULL_TREE;
6207 /* Check main's type after attributes have been applied. */
6208 if (ctype == NULL_TREE && DECL_MAIN_P (decl))
6210 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl)),
6213 tree oldtypeargs = TYPE_ARG_TYPES (TREE_TYPE (decl));
6215 error ("%<::main%> must return %<int%>");
6216 newtype = build_function_type (integer_type_node, oldtypeargs);
6217 TREE_TYPE (decl) = newtype;
6219 check_main_parameter_types (decl);
6222 if (ctype != NULL_TREE
6223 && (! TYPE_FOR_JAVA (ctype) || check_java_method (decl))
6228 old_decl = check_classfn (ctype, decl,
6229 (processing_template_decl
6230 > template_class_depth (ctype))
6231 ? current_template_parms
6238 if (TREE_CODE (old_decl) == TEMPLATE_DECL)
6239 /* Because grokfndecl is always supposed to return a
6240 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
6241 here. We depend on our callers to figure out that its
6242 really a template that's being returned. */
6243 old_decl = DECL_TEMPLATE_RESULT (old_decl);
6245 if (DECL_STATIC_FUNCTION_P (old_decl)
6246 && TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE)
6247 /* Remove the `this' parm added by grokclassfn.
6248 XXX Isn't this done in start_function, too? */
6249 revert_static_member_fn (decl);
6250 if (DECL_ARTIFICIAL (old_decl))
6251 error ("definition of implicitly-declared %qD", old_decl);
6253 /* Since we've smashed OLD_DECL to its
6254 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
6255 if (TREE_CODE (decl) == TEMPLATE_DECL)
6256 decl = DECL_TEMPLATE_RESULT (decl);
6258 /* Attempt to merge the declarations. This can fail, in
6259 the case of some invalid specialization declarations. */
6260 pushed_scope = push_scope (ctype);
6261 ok = duplicate_decls (decl, old_decl, friendp);
6263 pop_scope (pushed_scope);
6266 error ("no %q#D member function declared in class %qT",
6274 if (DECL_CONSTRUCTOR_P (decl) && !grok_ctor_properties (ctype, decl))
6277 if (ctype == NULL_TREE || check)
6281 DECL_VIRTUAL_P (decl) = 1;
6286 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
6287 the linkage that DECL will receive in the object file. */
6290 set_linkage_for_static_data_member (tree decl)
6292 /* A static data member always has static storage duration and
6293 external linkage. Note that static data members are forbidden in
6294 local classes -- the only situation in which a class has
6295 non-external linkage. */
6296 TREE_PUBLIC (decl) = 1;
6297 TREE_STATIC (decl) = 1;
6298 /* For non-template classes, static data members are always put
6299 out in exactly those files where they are defined, just as
6300 with ordinary namespace-scope variables. */
6301 if (!processing_template_decl)
6302 DECL_INTERFACE_KNOWN (decl) = 1;
6305 /* Create a VAR_DECL named NAME with the indicated TYPE.
6307 If SCOPE is non-NULL, it is the class type or namespace containing
6308 the variable. If SCOPE is NULL, the variable should is created in
6309 the innermost enclosings scope. */
6312 grokvardecl (tree type,
6314 const cp_decl_specifier_seq *declspecs,
6320 tree explicit_scope;
6322 gcc_assert (!name || TREE_CODE (name) == IDENTIFIER_NODE);
6324 /* Compute the scope in which to place the variable, but remember
6325 whether or not that scope was explicitly specified by the user. */
6326 explicit_scope = scope;
6329 /* An explicit "extern" specifier indicates a namespace-scope
6331 if (declspecs->storage_class == sc_extern)
6332 scope = current_namespace;
6333 else if (!at_function_scope_p ())
6334 scope = current_scope ();
6338 && (/* If the variable is a namespace-scope variable declared in a
6339 template, we need DECL_LANG_SPECIFIC. */
6340 (TREE_CODE (scope) == NAMESPACE_DECL && processing_template_decl)
6341 /* Similarly for namespace-scope variables with language linkage
6343 || (TREE_CODE (scope) == NAMESPACE_DECL
6344 && current_lang_name != lang_name_cplusplus)
6345 /* Similarly for static data members. */
6347 decl = build_lang_decl (VAR_DECL, name, type);
6349 decl = build_decl (VAR_DECL, name, type);
6351 if (explicit_scope && TREE_CODE (explicit_scope) == NAMESPACE_DECL)
6352 set_decl_namespace (decl, explicit_scope, 0);
6354 DECL_CONTEXT (decl) = FROB_CONTEXT (scope);
6356 if (declspecs->storage_class == sc_extern)
6358 DECL_THIS_EXTERN (decl) = 1;
6359 DECL_EXTERNAL (decl) = !initialized;
6362 if (DECL_CLASS_SCOPE_P (decl))
6364 set_linkage_for_static_data_member (decl);
6365 /* This function is only called with out-of-class definitions. */
6366 DECL_EXTERNAL (decl) = 0;
6367 check_class_member_definition_namespace (decl);
6369 /* At top level, either `static' or no s.c. makes a definition
6370 (perhaps tentative), and absence of `static' makes it public. */
6371 else if (toplevel_bindings_p ())
6373 TREE_PUBLIC (decl) = (declspecs->storage_class != sc_static
6374 && (DECL_THIS_EXTERN (decl) || ! constp));
6375 TREE_STATIC (decl) = ! DECL_EXTERNAL (decl);
6377 /* Not at top level, only `static' makes a static definition. */
6380 TREE_STATIC (decl) = declspecs->storage_class == sc_static;
6381 TREE_PUBLIC (decl) = DECL_EXTERNAL (decl);
6384 if (declspecs->specs[(int)ds_thread])
6385 DECL_TLS_MODEL (decl) = decl_default_tls_model (decl);
6387 if (TREE_PUBLIC (decl))
6389 /* [basic.link]: A name with no linkage (notably, the name of a class
6390 or enumeration declared in a local scope) shall not be used to
6391 declare an entity with linkage.
6393 Only check this for public decls for now. */
6394 tree t = no_linkage_check (TREE_TYPE (decl), /*relaxed_p=*/false);
6397 if (TYPE_ANONYMOUS_P (t))
6399 if (DECL_EXTERN_C_P (decl))
6400 /* Allow this; it's pretty common in C. */
6404 /* DRs 132, 319 and 389 seem to indicate types with
6405 no linkage can only be used to declare extern "C"
6406 entities. Since it's not always an error in the
6407 ISO C++ 90 Standard, we only issue a warning. */
6408 warning (0, "non-local variable %q#D uses anonymous type",
6410 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
6411 warning (0, "%q+#D does not refer to the unqualified "
6412 "type, so it is not used for linkage",
6417 warning (0, "non-local variable %q#D uses local type %qT", decl, t);
6421 DECL_INTERFACE_KNOWN (decl) = 1;
6426 /* Create and return a canonical pointer to member function type, for
6427 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
6430 build_ptrmemfunc_type (tree type)
6434 tree unqualified_variant = NULL_TREE;
6436 if (type == error_mark_node)
6439 /* If a canonical type already exists for this type, use it. We use
6440 this method instead of type_hash_canon, because it only does a
6441 simple equality check on the list of field members. */
6443 if ((t = TYPE_GET_PTRMEMFUNC_TYPE (type)))
6446 /* Make sure that we always have the unqualified pointer-to-member
6448 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
6450 = build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type));
6452 t = make_aggr_type (RECORD_TYPE);
6453 xref_basetypes (t, NULL_TREE);
6455 /* Let the front end know this is a pointer to member function... */
6456 TYPE_PTRMEMFUNC_FLAG (t) = 1;
6457 /* ... and not really an aggregate. */
6458 SET_IS_AGGR_TYPE (t, 0);
6460 field = build_decl (FIELD_DECL, pfn_identifier, type);
6463 field = build_decl (FIELD_DECL, delta_identifier, delta_type_node);
6464 TREE_CHAIN (field) = fields;
6467 finish_builtin_struct (t, "__ptrmemfunc_type", fields, ptr_type_node);
6469 /* Zap out the name so that the back end will give us the debugging
6470 information for this anonymous RECORD_TYPE. */
6471 TYPE_NAME (t) = NULL_TREE;
6473 /* If this is not the unqualified form of this pointer-to-member
6474 type, set the TYPE_MAIN_VARIANT for this type to be the
6475 unqualified type. Since they are actually RECORD_TYPEs that are
6476 not variants of each other, we must do this manually. */
6477 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
6479 t = build_qualified_type (t, cp_type_quals (type));
6480 TYPE_MAIN_VARIANT (t) = unqualified_variant;
6481 TYPE_NEXT_VARIANT (t) = TYPE_NEXT_VARIANT (unqualified_variant);
6482 TYPE_NEXT_VARIANT (unqualified_variant) = t;
6485 /* Cache this pointer-to-member type so that we can find it again
6487 TYPE_SET_PTRMEMFUNC_TYPE (type, t);
6489 if (TYPE_STRUCTURAL_EQUALITY_P (type))
6490 SET_TYPE_STRUCTURAL_EQUALITY (t);
6491 else if (TYPE_CANONICAL (type) != type)
6492 TYPE_CANONICAL (t) = build_ptrmemfunc_type (TYPE_CANONICAL (type));
6497 /* Create and return a pointer to data member type. */
6500 build_ptrmem_type (tree class_type, tree member_type)
6502 if (TREE_CODE (member_type) == METHOD_TYPE)
6506 arg_types = TYPE_ARG_TYPES (member_type);
6507 class_type = (cp_build_qualified_type
6509 cp_type_quals (TREE_TYPE (TREE_VALUE (arg_types)))));
6511 = build_method_type_directly (class_type,
6512 TREE_TYPE (member_type),
6513 TREE_CHAIN (arg_types));
6514 return build_ptrmemfunc_type (build_pointer_type (member_type));
6518 gcc_assert (TREE_CODE (member_type) != FUNCTION_TYPE);
6519 return build_offset_type (class_type, member_type);
6523 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
6524 Check to see that the definition is valid. Issue appropriate error
6525 messages. Return 1 if the definition is particularly bad, or 0
6529 check_static_variable_definition (tree decl, tree type)
6531 /* Motion 10 at San Diego: If a static const integral data member is
6532 initialized with an integral constant expression, the initializer
6533 may appear either in the declaration (within the class), or in
6534 the definition, but not both. If it appears in the class, the
6535 member is a member constant. The file-scope definition is always
6537 if (!ARITHMETIC_TYPE_P (type) && TREE_CODE (type) != ENUMERAL_TYPE)
6539 error ("invalid in-class initialization of static data member "
6540 "of non-integral type %qT",
6542 /* If we just return the declaration, crashes will sometimes
6543 occur. We therefore return void_type_node, as if this were a
6544 friend declaration, to cause callers to completely ignore
6545 this declaration. */
6548 else if (!CP_TYPE_CONST_P (type))
6549 error ("ISO C++ forbids in-class initialization of non-const "
6550 "static member %qD",
6552 else if (pedantic && !INTEGRAL_TYPE_P (type))
6553 pedwarn ("ISO C++ forbids initialization of member constant "
6554 "%qD of non-integral type %qT", decl, type);
6559 /* Given the SIZE (i.e., number of elements) in an array, compute an
6560 appropriate index type for the array. If non-NULL, NAME is the
6561 name of the thing being declared. */
6564 compute_array_index_type (tree name, tree size)
6568 tree abi_1_itype = NULL_TREE;
6570 if (error_operand_p (size))
6571 return error_mark_node;
6573 type = TREE_TYPE (size);
6574 /* The array bound must be an integer type. */
6575 if (!dependent_type_p (type) && !INTEGRAL_TYPE_P (type))
6578 error ("size of array %qD has non-integral type %qT", name, type);
6580 error ("size of array has non-integral type %qT", type);
6581 size = integer_one_node;
6582 type = TREE_TYPE (size);
6585 if (value_dependent_expression_p (size))
6587 /* We cannot do any checking for a value-dependent SIZE. Just
6588 build the index type and mark that it requires structural
6590 itype = build_index_type (build_min (MINUS_EXPR, sizetype,
6591 size, integer_one_node));
6592 SET_TYPE_STRUCTURAL_EQUALITY (itype);
6596 if (!abi_version_at_least (2) && processing_template_decl)
6597 /* For abi-1, we handled all instances in templates the same way,
6598 even when they were non-dependent. This effects the manglings
6599 produced. So, we do the normal checking for non-dependent
6600 sizes, but at the end we'll return the same type that abi-1
6601 would have, but with TYPE_CANONICAL set to the "right"
6602 value that the current ABI would provide. */
6603 abi_1_itype = build_index_type (build_min (MINUS_EXPR, sizetype,
6604 size, integer_one_node));
6606 /* The size might be the result of a cast. */
6607 STRIP_TYPE_NOPS (size);
6609 /* It might be a const variable or enumeration constant. */
6610 size = integral_constant_value (size);
6612 /* Normally, the array-bound will be a constant. */
6613 if (TREE_CODE (size) == INTEGER_CST)
6615 /* Check to see if the array bound overflowed. Make that an
6616 error, no matter how generous we're being. */
6617 int old_flag_pedantic_errors = flag_pedantic_errors;
6618 int old_pedantic = pedantic;
6619 pedantic = flag_pedantic_errors = 1;
6620 constant_expression_warning (size);
6621 pedantic = old_pedantic;
6622 flag_pedantic_errors = old_flag_pedantic_errors;
6624 /* An array must have a positive number of elements. */
6625 if (INT_CST_LT (size, integer_zero_node))
6628 error ("size of array %qD is negative", name);
6630 error ("size of array is negative");
6631 size = integer_one_node;
6633 /* As an extension we allow zero-sized arrays. We always allow
6634 them in system headers because glibc uses them. */
6635 else if (integer_zerop (size) && pedantic && !in_system_header)
6638 pedwarn ("ISO C++ forbids zero-size array %qD", name);
6640 pedwarn ("ISO C++ forbids zero-size array");
6643 else if (TREE_CONSTANT (size))
6645 /* `(int) &fn' is not a valid array bound. */
6647 error ("size of array %qD is not an integral constant-expression",
6650 error ("size of array is not an integral constant-expression");
6651 size = integer_one_node;
6653 else if (pedantic && warn_vla != 0)
6656 pedwarn ("ISO C++ forbids variable length array %qD", name);
6658 pedwarn ("ISO C++ forbids variable length array");
6660 else if (warn_vla > 0)
6664 "variable length array %qD is used", name);
6667 "variable length array is used");
6670 if (processing_template_decl && !TREE_CONSTANT (size))
6671 /* A variable sized array. */
6672 itype = build_min (MINUS_EXPR, sizetype, size, integer_one_node);
6675 HOST_WIDE_INT saved_processing_template_decl;
6677 /* Compute the index of the largest element in the array. It is
6678 one less than the number of elements in the array. We save
6679 and restore PROCESSING_TEMPLATE_DECL so that computations in
6680 cp_build_binary_op will be appropriately folded. */
6681 saved_processing_template_decl = processing_template_decl;
6682 processing_template_decl = 0;
6683 itype = cp_build_binary_op (MINUS_EXPR,
6684 cp_convert (ssizetype, size),
6685 cp_convert (ssizetype, integer_one_node));
6686 itype = fold (itype);
6687 processing_template_decl = saved_processing_template_decl;
6689 if (!TREE_CONSTANT (itype))
6690 /* A variable sized array. */
6691 itype = variable_size (itype);
6692 /* Make sure that there was no overflow when creating to a signed
6693 index type. (For example, on a 32-bit machine, an array with
6694 size 2^32 - 1 is too big.) */
6695 else if (TREE_CODE (itype) == INTEGER_CST
6696 && TREE_OVERFLOW (itype))
6698 error ("overflow in array dimension");
6699 TREE_OVERFLOW (itype) = 0;
6703 /* Create and return the appropriate index type. */
6706 tree t = build_index_type (itype);
6707 TYPE_CANONICAL (abi_1_itype) = TYPE_CANONICAL (t);
6711 return build_index_type (itype);
6714 /* Returns the scope (if any) in which the entity declared by
6715 DECLARATOR will be located. If the entity was declared with an
6716 unqualified name, NULL_TREE is returned. */
6719 get_scope_of_declarator (const cp_declarator *declarator)
6721 while (declarator && declarator->kind != cdk_id)
6722 declarator = declarator->declarator;
6724 /* If the declarator-id is a SCOPE_REF, the scope in which the
6725 declaration occurs is the first operand. */
6727 && declarator->u.id.qualifying_scope)
6728 return declarator->u.id.qualifying_scope;
6730 /* Otherwise, the declarator is not a qualified name; the entity will
6731 be declared in the current scope. */
6735 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
6736 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
6740 create_array_type_for_decl (tree name, tree type, tree size)
6742 tree itype = NULL_TREE;
6743 const char* error_msg;
6745 /* If things have already gone awry, bail now. */
6746 if (type == error_mark_node || size == error_mark_node)
6747 return error_mark_node;
6749 /* Assume that everything will go OK. */
6752 /* There are some types which cannot be array elements. */
6753 switch (TREE_CODE (type))
6756 error_msg = "array of void";
6760 error_msg = "array of functions";
6763 case REFERENCE_TYPE:
6764 error_msg = "array of references";
6768 error_msg = "array of function members";
6775 /* If something went wrong, issue an error-message and return. */
6779 error ("declaration of %qD as %s", name, error_msg);
6781 error ("creating %s", error_msg);
6783 return error_mark_node;
6788 The constant expressions that specify the bounds of the arrays
6789 can be omitted only for the first member of the sequence. */
6790 if (TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type))
6793 error ("declaration of %qD as multidimensional array must "
6794 "have bounds for all dimensions except the first",
6797 error ("multidimensional array must have bounds for all "
6798 "dimensions except the first");
6800 return error_mark_node;
6803 /* Figure out the index type for the array. */
6805 itype = compute_array_index_type (name, size);
6808 T is called the array element type; this type shall not be [...] an
6809 abstract class type. */
6810 abstract_virtuals_error (name, type);
6812 return build_cplus_array_type (type, itype);
6815 /* Check that it's OK to declare a function with the indicated TYPE.
6816 SFK indicates the kind of special function (if any) that this
6817 function is. OPTYPE is the type given in a conversion operator
6818 declaration, or the class type for a constructor/destructor.
6819 Returns the actual return type of the function; that
6820 may be different than TYPE if an error occurs, or for certain
6821 special functions. */
6824 check_special_function_return_type (special_function_kind sfk,
6830 case sfk_constructor:
6832 error ("return type specification for constructor invalid");
6834 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
6835 type = build_pointer_type (optype);
6837 type = void_type_node;
6840 case sfk_destructor:
6842 error ("return type specification for destructor invalid");
6843 /* We can't use the proper return type here because we run into
6844 problems with ambiguous bases and covariant returns.
6845 Java classes are left unchanged because (void *) isn't a valid
6846 Java type, and we don't want to change the Java ABI. */
6847 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
6848 type = build_pointer_type (void_type_node);
6850 type = void_type_node;
6853 case sfk_conversion:
6854 if (type && !same_type_p (type, optype))
6855 error ("operator %qT declared to return %qT", optype, type);
6857 pedwarn ("return type specified for %<operator %T%>", optype);
6868 /* A variable or data member (whose unqualified name is IDENTIFIER)
6869 has been declared with the indicated TYPE. If the TYPE is not
6870 acceptable, issue an error message and return a type to use for
6871 error-recovery purposes. */
6874 check_var_type (tree identifier, tree type)
6876 if (VOID_TYPE_P (type))
6879 error ("unnamed variable or field declared void");
6880 else if (TREE_CODE (identifier) == IDENTIFIER_NODE)
6882 gcc_assert (!IDENTIFIER_OPNAME_P (identifier));
6883 error ("variable or field %qE declared void", identifier);
6886 error ("variable or field declared void");
6887 type = error_mark_node;
6893 /* Given declspecs and a declarator (abstract or otherwise), determine
6894 the name and type of the object declared and construct a DECL node
6897 DECLSPECS points to the representation of declaration-specifier
6898 sequence that precedes declarator.
6900 DECL_CONTEXT says which syntactic context this declaration is in:
6901 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
6902 FUNCDEF for a function definition. Like NORMAL but a few different
6903 error messages in each case. Return value may be zero meaning
6904 this definition is too screwy to try to parse.
6905 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
6906 handle member functions (which have FIELD context).
6907 Return value may be zero meaning this definition is too screwy to
6909 PARM for a parameter declaration (either within a function prototype
6910 or before a function body). Make a PARM_DECL, or return void_type_node.
6911 CATCHPARM for a parameter declaration before a catch clause.
6912 TYPENAME if for a typename (in a cast or sizeof).
6913 Don't make a DECL node; just return the ..._TYPE node.
6914 FIELD for a struct or union field; make a FIELD_DECL.
6915 BITFIELD for a field with specified width.
6916 INITIALIZED is 1 if the decl has an initializer.
6918 ATTRLIST is a pointer to the list of attributes, which may be NULL
6919 if there are none; *ATTRLIST may be modified if attributes from inside
6920 the declarator should be applied to the declaration.
6922 When this function is called, scoping variables (such as
6923 CURRENT_CLASS_TYPE) should reflect the scope in which the
6924 declaration occurs, not the scope in which the new declaration will
6925 be placed. For example, on:
6929 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
6932 Returns a DECL (if a declarator is present), a TYPE (if there is no
6933 declarator, in cases like "struct S;"), or the ERROR_MARK_NODE if an
6937 grokdeclarator (const cp_declarator *declarator,
6938 const cp_decl_specifier_seq *declspecs,
6939 enum decl_context decl_context,
6943 tree type = NULL_TREE;
6945 int virtualp, explicitp, friendp, inlinep, staticp;
6946 int explicit_int = 0;
6947 int explicit_char = 0;
6948 int defaulted_int = 0;
6949 tree dependent_name = NULL_TREE;
6951 tree typedef_decl = NULL_TREE;
6952 const char *name = NULL;
6953 tree typedef_type = NULL_TREE;
6954 /* True if this declarator is a function definition. */
6955 bool funcdef_flag = false;
6956 cp_declarator_kind innermost_code = cdk_error;
6959 /* See the code below that used this. */
6960 tree decl_attr = NULL_TREE;
6963 /* Keep track of what sort of function is being processed
6964 so that we can warn about default return values, or explicit
6965 return values which do not match prescribed defaults. */
6966 special_function_kind sfk = sfk_none;
6968 tree dname = NULL_TREE;
6969 tree ctor_return_type = NULL_TREE;
6970 enum overload_flags flags = NO_SPECIAL;
6971 /* cv-qualifiers that apply to the declarator, for a declaration of
6972 a member function. */
6973 cp_cv_quals memfn_quals = TYPE_UNQUALIFIED;
6974 /* cv-qualifiers that apply to the type specified by the DECLSPECS. */
6976 tree raises = NULL_TREE;
6977 int template_count = 0;
6978 tree returned_attrs = NULL_TREE;
6979 tree parms = NULL_TREE;
6980 const cp_declarator *id_declarator;
6981 /* The unqualified name of the declarator; either an
6982 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
6983 tree unqualified_id;
6984 /* The class type, if any, in which this entity is located,
6985 or NULL_TREE if none. Note that this value may be different from
6986 the current class type; for example if an attempt is made to declare
6987 "A::f" inside "B", this value will be "A". */
6988 tree ctype = current_class_type;
6989 /* The NAMESPACE_DECL for the namespace in which this entity is
6990 located. If an unqualified name is used to declare the entity,
6991 this value will be NULL_TREE, even if the entity is located at
6993 tree in_namespace = NULL_TREE;
6994 cp_storage_class storage_class;
6995 bool unsigned_p, signed_p, short_p, long_p, thread_p;
6996 bool type_was_error_mark_node = false;
6997 bool parameter_pack_p = declarator? declarator->parameter_pack_p : false;
6998 bool set_no_warning = false;
7000 signed_p = declspecs->specs[(int)ds_signed];
7001 unsigned_p = declspecs->specs[(int)ds_unsigned];
7002 short_p = declspecs->specs[(int)ds_short];
7003 long_p = declspecs->specs[(int)ds_long];
7004 longlong = declspecs->specs[(int)ds_long] >= 2;
7005 thread_p = declspecs->specs[(int)ds_thread];
7007 if (decl_context == FUNCDEF)
7008 funcdef_flag = true, decl_context = NORMAL;
7009 else if (decl_context == MEMFUNCDEF)
7010 funcdef_flag = true, decl_context = FIELD;
7011 else if (decl_context == BITFIELD)
7012 bitfield = 1, decl_context = FIELD;
7014 /* Look inside a declarator for the name being declared
7015 and get it as a string, for an error message. */
7016 for (id_declarator = declarator;
7018 id_declarator = id_declarator->declarator)
7020 if (id_declarator->kind != cdk_id)
7021 innermost_code = id_declarator->kind;
7023 switch (id_declarator->kind)
7026 if (id_declarator->declarator
7027 && id_declarator->declarator->kind == cdk_id)
7029 sfk = id_declarator->declarator->u.id.sfk;
7030 if (sfk == sfk_destructor)
7037 tree qualifying_scope = id_declarator->u.id.qualifying_scope;
7038 tree decl = id_declarator->u.id.unqualified_name;
7041 if (qualifying_scope)
7043 if (at_function_scope_p ())
7047 A declarator-id shall not be qualified except
7050 None of the cases are permitted in block
7052 if (qualifying_scope == global_namespace)
7053 error ("invalid use of qualified-name %<::%D%>",
7055 else if (TYPE_P (qualifying_scope))
7056 error ("invalid use of qualified-name %<%T::%D%>",
7057 qualifying_scope, decl);
7059 error ("invalid use of qualified-name %<%D::%D%>",
7060 qualifying_scope, decl);
7061 return error_mark_node;
7063 else if (TYPE_P (qualifying_scope))
7065 ctype = qualifying_scope;
7066 if (innermost_code != cdk_function
7067 && current_class_type
7068 && !UNIQUELY_DERIVED_FROM_P (ctype,
7069 current_class_type))
7071 error ("type %qT is not derived from type %qT",
7072 ctype, current_class_type);
7073 return error_mark_node;
7076 else if (TREE_CODE (qualifying_scope) == NAMESPACE_DECL)
7077 in_namespace = qualifying_scope;
7079 switch (TREE_CODE (decl))
7085 if (innermost_code != cdk_function)
7087 error ("declaration of %qD as non-function", decl);
7088 return error_mark_node;
7090 else if (!qualifying_scope
7091 && !(current_class_type && at_class_scope_p ()))
7093 error ("declaration of %qD as non-member", decl);
7094 return error_mark_node;
7097 type = TREE_OPERAND (decl, 0);
7098 name = IDENTIFIER_POINTER (constructor_name (type));
7103 case TEMPLATE_ID_EXPR:
7105 tree fns = TREE_OPERAND (decl, 0);
7108 if (TREE_CODE (dname) != IDENTIFIER_NODE)
7110 gcc_assert (is_overloaded_fn (dname));
7111 dname = DECL_NAME (get_first_fn (dname));
7116 case IDENTIFIER_NODE:
7117 if (TREE_CODE (decl) == IDENTIFIER_NODE)
7120 if (C_IS_RESERVED_WORD (dname))
7122 error ("declarator-id missing; using reserved word %qD",
7124 name = IDENTIFIER_POINTER (dname);
7126 else if (!IDENTIFIER_TYPENAME_P (dname))
7127 name = IDENTIFIER_POINTER (dname);
7130 gcc_assert (flags == NO_SPECIAL);
7131 flags = TYPENAME_FLAG;
7132 ctor_return_type = TREE_TYPE (dname);
7133 sfk = sfk_conversion;
7134 if (is_typename_at_global_scope (dname))
7135 name = IDENTIFIER_POINTER (dname);
7137 name = "<invalid operator>";
7153 return error_mark_node;
7159 if (id_declarator->kind == cdk_id)
7165 The declarator in a function-definition shall have the form
7166 D1 ( parameter-declaration-clause) ... */
7167 if (funcdef_flag && innermost_code != cdk_function)
7169 error ("function definition does not declare parameters");
7170 return error_mark_node;
7173 if (((dname && IDENTIFIER_OPNAME_P (dname)) || flags == TYPENAME_FLAG)
7174 && innermost_code != cdk_function
7175 && ! (ctype && !declspecs->any_specifiers_p))
7177 error ("declaration of %qD as non-function", dname);
7178 return error_mark_node;
7181 /* Anything declared one level down from the top level
7182 must be one of the parameters of a function
7183 (because the body is at least two levels down). */
7185 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
7186 by not allowing C++ class definitions to specify their parameters
7187 with xdecls (must be spec.d in the parmlist).
7189 Since we now wait to push a class scope until we are sure that
7190 we are in a legitimate method context, we must set oldcname
7191 explicitly (since current_class_name is not yet alive).
7193 We also want to avoid calling this a PARM if it is in a namespace. */
7195 if (decl_context == NORMAL && !toplevel_bindings_p ())
7197 struct cp_binding_level *b = current_binding_level;
7198 current_binding_level = b->level_chain;
7199 if (current_binding_level != 0 && toplevel_bindings_p ())
7200 decl_context = PARM;
7201 current_binding_level = b;
7205 name = decl_context == PARM ? "parameter" : "type name";
7207 /* If there were multiple types specified in the decl-specifier-seq,
7208 issue an error message. */
7209 if (declspecs->multiple_types_p)
7211 error ("two or more data types in declaration of %qs", name);
7212 return error_mark_node;
7215 /* Extract the basic type from the decl-specifier-seq. */
7216 type = declspecs->type;
7217 if (type == error_mark_node)
7220 type_was_error_mark_node = true;
7222 /* If the entire declaration is itself tagged as deprecated then
7223 suppress reports of deprecated items. */
7224 if (type && TREE_DEPRECATED (type)
7225 && deprecated_state != DEPRECATED_SUPPRESS)
7226 warn_deprecated_use (type);
7227 if (type && TREE_CODE (type) == TYPE_DECL)
7229 typedef_decl = type;
7230 type = TREE_TYPE (typedef_decl);
7232 /* No type at all: default to `int', and set DEFAULTED_INT
7233 because it was not a user-defined typedef. */
7234 if (type == NULL_TREE && (signed_p || unsigned_p || long_p || short_p))
7236 /* These imply 'int'. */
7237 type = integer_type_node;
7241 explicit_int = declspecs->explicit_int_p;
7242 explicit_char = declspecs->explicit_char_p;
7245 /* See the code below that used this. */
7247 decl_attr = DECL_ATTRIBUTES (typedef_decl);
7249 typedef_type = type;
7252 if (sfk != sfk_conversion)
7253 ctor_return_type = ctype;
7255 if (sfk != sfk_none)
7256 type = check_special_function_return_type (sfk, type,
7258 else if (type == NULL_TREE)
7264 /* We handle `main' specially here, because 'main () { }' is so
7265 common. With no options, it is allowed. With -Wreturn-type,
7266 it is a warning. It is only an error with -pedantic-errors. */
7267 is_main = (funcdef_flag
7268 && dname && MAIN_NAME_P (dname)
7269 && ctype == NULL_TREE
7270 && in_namespace == NULL_TREE
7271 && current_namespace == global_namespace);
7273 if (type_was_error_mark_node)
7274 /* We've already issued an error, don't complain more. */;
7275 else if (in_system_header || flag_ms_extensions)
7276 /* Allow it, sigh. */;
7277 else if (pedantic || ! is_main)
7278 pedwarn ("ISO C++ forbids declaration of %qs with no type", name);
7280 warning (OPT_Wreturn_type,
7281 "ISO C++ forbids declaration of %qs with no type", name);
7283 type = integer_type_node;
7288 /* Now process the modifiers that were specified
7289 and check for invalid combinations. */
7291 /* Long double is a special combination. */
7292 if (long_p && !longlong && TYPE_MAIN_VARIANT (type) == double_type_node)
7295 type = build_qualified_type (long_double_type_node,
7296 cp_type_quals (type));
7299 /* Check all other uses of type modifiers. */
7301 if (unsigned_p || signed_p || long_p || short_p)
7305 if ((signed_p || unsigned_p) && TREE_CODE (type) != INTEGER_TYPE)
7306 error ("%<signed%> or %<unsigned%> invalid for %qs", name);
7307 else if (signed_p && unsigned_p)
7308 error ("%<signed%> and %<unsigned%> specified together for %qs", name);
7309 else if (longlong && TREE_CODE (type) != INTEGER_TYPE)
7310 error ("%<long long%> invalid for %qs", name);
7311 else if (long_p && TREE_CODE (type) == REAL_TYPE)
7312 error ("%<long%> invalid for %qs", name);
7313 else if (short_p && TREE_CODE (type) == REAL_TYPE)
7314 error ("%<short%> invalid for %qs", name);
7315 else if ((long_p || short_p) && TREE_CODE (type) != INTEGER_TYPE)
7316 error ("%<long%> or %<short%> invalid for %qs", name);
7317 else if ((long_p || short_p) && explicit_char)
7318 error ("%<long%> or %<short%> specified with char for %qs", name);
7319 else if (long_p && short_p)
7320 error ("%<long%> and %<short%> specified together for %qs", name);
7324 if (!explicit_int && !defaulted_int && !explicit_char && pedantic)
7326 pedwarn ("long, short, signed or unsigned used invalidly for %qs",
7328 if (flag_pedantic_errors)
7333 /* Discard the type modifiers if they are invalid. */
7344 /* Decide whether an integer type is signed or not.
7345 Optionally treat bitfields as signed by default. */
7349 It is implementation-defined whether a plain (neither
7350 explicitly signed or unsigned) char, short, int, or long
7351 bit-field is signed or unsigned.
7353 Naturally, we extend this to long long as well. Note that
7354 this does not include wchar_t. */
7355 || (bitfield && !flag_signed_bitfields
7357 /* A typedef for plain `int' without `signed' can be
7358 controlled just like plain `int', but a typedef for
7359 `signed int' cannot be so controlled. */
7361 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl))
7362 && TREE_CODE (type) == INTEGER_TYPE
7363 && !same_type_p (TYPE_MAIN_VARIANT (type), wchar_type_node)))
7366 type = long_long_unsigned_type_node;
7368 type = long_unsigned_type_node;
7370 type = short_unsigned_type_node;
7371 else if (type == char_type_node)
7372 type = unsigned_char_type_node;
7373 else if (typedef_decl)
7374 type = c_common_unsigned_type (type);
7376 type = unsigned_type_node;
7378 else if (signed_p && type == char_type_node)
7379 type = signed_char_type_node;
7381 type = long_long_integer_type_node;
7383 type = long_integer_type_node;
7385 type = short_integer_type_node;
7387 if (declspecs->specs[(int)ds_complex])
7389 if (TREE_CODE (type) != INTEGER_TYPE && TREE_CODE (type) != REAL_TYPE)
7390 error ("complex invalid for %qs", name);
7391 /* If we just have "complex", it is equivalent to
7392 "complex double", but if any modifiers at all are specified it is
7393 the complex form of TYPE. E.g, "complex short" is
7394 "complex short int". */
7396 else if (defaulted_int && ! longlong
7397 && ! (long_p || short_p || signed_p || unsigned_p))
7398 type = complex_double_type_node;
7399 else if (type == integer_type_node)
7400 type = complex_integer_type_node;
7401 else if (type == float_type_node)
7402 type = complex_float_type_node;
7403 else if (type == double_type_node)
7404 type = complex_double_type_node;
7405 else if (type == long_double_type_node)
7406 type = complex_long_double_type_node;
7408 type = build_complex_type (type);
7411 type_quals = TYPE_UNQUALIFIED;
7412 if (declspecs->specs[(int)ds_const])
7413 type_quals |= TYPE_QUAL_CONST;
7414 if (declspecs->specs[(int)ds_volatile])
7415 type_quals |= TYPE_QUAL_VOLATILE;
7416 if (declspecs->specs[(int)ds_restrict])
7417 type_quals |= TYPE_QUAL_RESTRICT;
7418 if (sfk == sfk_conversion && type_quals != TYPE_UNQUALIFIED)
7419 error ("qualifiers are not allowed on declaration of %<operator %T%>",
7422 if (TREE_CODE (type) == FUNCTION_TYPE
7423 && type_quals != TYPE_UNQUALIFIED)
7425 /* This was an error in C++98 (cv-qualifiers cannot be added to
7426 a function type), but DR 295 makes the code well-formed by
7427 dropping the extra qualifiers. */
7430 tree bad_type = build_qualified_type (type, type_quals);
7431 pedwarn ("ignoring %qV qualifiers added to function type %qT",
7434 type_quals = TYPE_UNQUALIFIED;
7436 type_quals |= cp_type_quals (type);
7437 type = cp_build_qualified_type_real
7438 (type, type_quals, ((typedef_decl && !DECL_ARTIFICIAL (typedef_decl)
7439 ? tf_ignore_bad_quals : 0) | tf_warning_or_error));
7440 /* We might have ignored or rejected some of the qualifiers. */
7441 type_quals = cp_type_quals (type);
7444 inlinep = !! declspecs->specs[(int)ds_inline];
7445 virtualp = !! declspecs->specs[(int)ds_virtual];
7446 explicitp = !! declspecs->specs[(int)ds_explicit];
7448 storage_class = declspecs->storage_class;
7449 if (storage_class == sc_static)
7450 staticp = 1 + (decl_context == FIELD);
7452 if (virtualp && staticp == 2)
7454 error ("member %qD cannot be declared both virtual and static", dname);
7455 storage_class = sc_none;
7458 friendp = !! declspecs->specs[(int)ds_friend];
7460 if (dependent_name && !friendp)
7462 error ("%<%T::%D%> is not a valid declarator", ctype, dependent_name);
7463 return error_mark_node;
7466 /* Issue errors about use of storage classes for parameters. */
7467 if (decl_context == PARM)
7469 if (declspecs->specs[(int)ds_typedef])
7471 error ("typedef declaration invalid in parameter declaration");
7472 return error_mark_node;
7474 else if (storage_class == sc_static
7475 || storage_class == sc_extern
7477 error ("storage class specifiers invalid in parameter declarations");
7480 /* Give error if `virtual' is used outside of class declaration. */
7482 && (current_class_name == NULL_TREE || decl_context != FIELD))
7484 error ("virtual outside class declaration");
7488 /* Static anonymous unions are dealt with here. */
7489 if (staticp && decl_context == TYPENAME
7491 && ANON_AGGR_TYPE_P (declspecs->type))
7492 decl_context = FIELD;
7494 /* Warn about storage classes that are invalid for certain
7495 kinds of declarations (parameters, typenames, etc.). */
7498 && storage_class != sc_extern
7499 && storage_class != sc_static)
7500 || declspecs->specs[(int)ds_typedef]))
7502 error ("multiple storage classes in declaration of %qs", name);
7505 if (declspecs->conflicting_specifiers_p)
7507 error ("conflicting specifiers in declaration of %qs", name);
7508 storage_class = sc_none;
7510 else if (decl_context != NORMAL
7511 && ((storage_class != sc_none
7512 && storage_class != sc_mutable)
7515 if ((decl_context == PARM || decl_context == CATCHPARM)
7516 && (storage_class == sc_register
7517 || storage_class == sc_auto))
7519 else if (declspecs->specs[(int)ds_typedef])
7521 else if (decl_context == FIELD
7522 /* C++ allows static class elements. */
7523 && storage_class == sc_static)
7524 /* C++ also allows inlines and signed and unsigned elements,
7525 but in those cases we don't come in here. */
7529 if (decl_context == FIELD)
7530 error ("storage class specified for %qs", name);
7533 if (decl_context == PARM || decl_context == CATCHPARM)
7534 error ("storage class specified for parameter %qs", name);
7536 error ("storage class specified for typename");
7538 if (storage_class == sc_register
7539 || storage_class == sc_auto
7540 || storage_class == sc_extern
7542 storage_class = sc_none;
7545 else if (storage_class == sc_extern && initialized
7548 if (toplevel_bindings_p ())
7550 /* It's common practice (and completely valid) to have a const
7551 be initialized and declared extern. */
7552 if (!(type_quals & TYPE_QUAL_CONST))
7553 warning (0, "%qs initialized and declared %<extern%>", name);
7556 error ("%qs has both %<extern%> and initializer", name);
7558 else if (storage_class == sc_extern && funcdef_flag
7559 && ! toplevel_bindings_p ())
7560 error ("nested function %qs declared %<extern%>", name);
7561 else if (toplevel_bindings_p ())
7563 if (storage_class == sc_auto)
7564 error ("top-level declaration of %qs specifies %<auto%>", name);
7567 && storage_class != sc_extern
7568 && storage_class != sc_static)
7570 error ("function-scope %qs implicitly auto and declared %<__thread%>",
7575 if (storage_class && friendp)
7576 error ("storage class specifiers invalid in friend function declarations");
7579 unqualified_id = NULL_TREE;
7582 unqualified_id = id_declarator->u.id.unqualified_name;
7583 switch (TREE_CODE (unqualified_id))
7587 = constructor_name (TREE_OPERAND (unqualified_id, 0));
7590 case IDENTIFIER_NODE:
7591 case TEMPLATE_ID_EXPR:
7599 /* Determine the type of the entity declared by recurring on the
7601 for (; declarator; declarator = declarator->declarator)
7603 const cp_declarator *inner_declarator;
7606 if (type == error_mark_node)
7607 return error_mark_node;
7609 attrs = declarator->attributes;
7615 if (declarator == NULL || declarator->kind == cdk_id)
7616 attr_flags |= (int) ATTR_FLAG_DECL_NEXT;
7617 if (declarator->kind == cdk_function)
7618 attr_flags |= (int) ATTR_FLAG_FUNCTION_NEXT;
7619 if (declarator->kind == cdk_array)
7620 attr_flags |= (int) ATTR_FLAG_ARRAY_NEXT;
7621 returned_attrs = decl_attributes (&type,
7622 chainon (returned_attrs, attrs),
7626 if (declarator->kind == cdk_id)
7629 inner_declarator = declarator->declarator;
7631 switch (declarator->kind)
7634 type = create_array_type_for_decl (dname, type,
7635 declarator->u.array.bounds);
7643 /* Declaring a function type.
7644 Make sure we have a valid type for the function to return. */
7646 if (type_quals != TYPE_UNQUALIFIED)
7648 if (SCALAR_TYPE_P (type) || VOID_TYPE_P (type))
7649 warning (OPT_Wreturn_type,
7650 "type qualifiers ignored on function return type");
7651 /* We now know that the TYPE_QUALS don't apply to the
7652 decl, but to its return type. */
7653 type_quals = TYPE_UNQUALIFIED;
7654 set_no_warning = true;
7657 /* Warn about some types functions can't return. */
7659 if (TREE_CODE (type) == FUNCTION_TYPE)
7661 error ("%qs declared as function returning a function", name);
7662 type = integer_type_node;
7664 if (TREE_CODE (type) == ARRAY_TYPE)
7666 error ("%qs declared as function returning an array", name);
7667 type = integer_type_node;
7670 /* Pick up type qualifiers which should be applied to `this'. */
7671 memfn_quals = declarator->u.function.qualifiers;
7673 /* Pick up the exception specifications. */
7674 raises = declarator->u.function.exception_specification;
7676 /* Say it's a definition only for the CALL_EXPR
7677 closest to the identifier. */
7678 funcdecl_p = inner_declarator && inner_declarator->kind == cdk_id;
7680 if (ctype == NULL_TREE
7681 && decl_context == FIELD
7683 && (friendp == 0 || dname == current_class_name))
7684 ctype = current_class_type;
7686 if (ctype && (sfk == sfk_constructor
7687 || sfk == sfk_destructor))
7689 /* We are within a class's scope. If our declarator name
7690 is the same as the class name, and we are defining
7691 a function, then it is a constructor/destructor, and
7692 therefore returns a void type. */
7694 /* ISO C++ 12.4/2. A destructor may not be declared
7695 const or volatile. A destructor may not be
7698 ISO C++ 12.1. A constructor may not be declared
7699 const or volatile. A constructor may not be
7700 virtual. A constructor may not be static. */
7702 error ((flags == DTOR_FLAG)
7703 ? "destructor cannot be static member function"
7704 : "constructor cannot be static member function");
7707 error ((flags == DTOR_FLAG)
7708 ? "destructors may not be cv-qualified"
7709 : "constructors may not be cv-qualified");
7710 memfn_quals = TYPE_UNQUALIFIED;
7713 if (decl_context == FIELD
7714 && !member_function_or_else (ctype,
7717 return error_mark_node;
7719 if (flags != DTOR_FLAG)
7721 /* It's a constructor. */
7726 pedwarn ("constructors cannot be declared virtual");
7729 if (decl_context == FIELD
7730 && sfk != sfk_constructor)
7731 return error_mark_node;
7733 if (decl_context == FIELD)
7739 error ("can't initialize friend function %qs", name);
7742 /* Cannot be both friend and virtual. */
7743 error ("virtual functions cannot be friends");
7746 if (decl_context == NORMAL)
7747 error ("friend declaration not in class definition");
7748 if (current_function_decl && funcdef_flag)
7749 error ("can't define friend function %qs in a local "
7754 arg_types = grokparms (declarator->u.function.parameters,
7757 if (inner_declarator
7758 && inner_declarator->kind == cdk_id
7759 && inner_declarator->u.id.sfk == sfk_destructor
7760 && arg_types != void_list_node)
7762 error ("destructors may not have parameters");
7763 arg_types = void_list_node;
7767 type = build_function_type (type, arg_types);
7774 /* Filter out pointers-to-references and references-to-references.
7775 We can get these if a TYPE_DECL is used. */
7777 if (TREE_CODE (type) == REFERENCE_TYPE)
7779 error (declarator->kind == cdk_reference
7780 ? "cannot declare reference to %q#T"
7781 : "cannot declare pointer to %q#T", type);
7782 type = TREE_TYPE (type);
7784 else if (VOID_TYPE_P (type))
7786 if (declarator->kind == cdk_reference)
7787 error ("cannot declare reference to %q#T", type);
7788 else if (declarator->kind == cdk_ptrmem)
7789 error ("cannot declare pointer to %q#T member", type);
7792 /* We now know that the TYPE_QUALS don't apply to the decl,
7793 but to the target of the pointer. */
7794 type_quals = TYPE_UNQUALIFIED;
7796 if (declarator->kind == cdk_ptrmem
7797 && (TREE_CODE (type) == FUNCTION_TYPE || memfn_quals))
7799 memfn_quals |= cp_type_quals (type);
7800 type = build_memfn_type (type,
7801 declarator->u.pointer.class_type,
7803 memfn_quals = TYPE_UNQUALIFIED;
7806 if (declarator->kind == cdk_reference)
7808 if (!VOID_TYPE_P (type))
7809 type = build_reference_type (type);
7811 else if (TREE_CODE (type) == METHOD_TYPE)
7812 type = build_ptrmemfunc_type (build_pointer_type (type));
7813 else if (declarator->kind == cdk_ptrmem)
7815 gcc_assert (TREE_CODE (declarator->u.pointer.class_type)
7817 if (declarator->u.pointer.class_type == error_mark_node)
7818 /* We will already have complained. */
7819 type = error_mark_node;
7821 type = build_ptrmem_type (declarator->u.pointer.class_type,
7825 type = build_pointer_type (type);
7827 /* Process a list of type modifier keywords (such as
7828 const or volatile) that were given inside the `*' or `&'. */
7830 if (declarator->u.pointer.qualifiers)
7833 = cp_build_qualified_type (type,
7834 declarator->u.pointer.qualifiers);
7835 type_quals = cp_type_quals (type);
7848 if (unqualified_id && TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR
7849 && TREE_CODE (type) != FUNCTION_TYPE
7850 && TREE_CODE (type) != METHOD_TYPE)
7852 error ("template-id %qD used as a declarator",
7854 unqualified_id = dname;
7857 /* If TYPE is a FUNCTION_TYPE, but the function name was explicitly
7858 qualified with a class-name, turn it into a METHOD_TYPE, unless
7859 we know that the function is static. We take advantage of this
7860 opportunity to do other processing that pertains to entities
7861 explicitly declared to be class members. Note that if DECLARATOR
7862 is non-NULL, we know it is a cdk_id declarator; otherwise, we
7863 would not have exited the loop above. */
7865 && declarator->u.id.qualifying_scope
7866 && TYPE_P (declarator->u.id.qualifying_scope))
7870 ctype = declarator->u.id.qualifying_scope;
7871 ctype = TYPE_MAIN_VARIANT (ctype);
7873 while (t != NULL_TREE && CLASS_TYPE_P (t))
7875 /* You're supposed to have one `template <...>' for every
7876 template class, but you don't need one for a full
7877 specialization. For example:
7879 template <class T> struct S{};
7880 template <> struct S<int> { void f(); };
7881 void S<int>::f () {}
7883 is correct; there shouldn't be a `template <>' for the
7884 definition of `S<int>::f'. */
7885 if (CLASSTYPE_TEMPLATE_SPECIALIZATION (t)
7886 && !any_dependent_template_arguments_p (CLASSTYPE_TI_ARGS (t)))
7887 /* T is an explicit (not partial) specialization. All
7888 containing classes must therefore also be explicitly
7891 if ((CLASSTYPE_USE_TEMPLATE (t) || CLASSTYPE_IS_TEMPLATE (t))
7892 && PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (t)))
7893 template_count += 1;
7895 t = TYPE_MAIN_DECL (t);
7896 t = DECL_CONTEXT (t);
7899 if (ctype == current_class_type)
7902 pedwarn ("member functions are implicitly friends of their class");
7904 pedwarn ("extra qualification %<%T::%> on member %qs",
7907 else if (/* If the qualifying type is already complete, then we
7908 can skip the following checks. */
7909 !COMPLETE_TYPE_P (ctype)
7910 && (/* If the function is being defined, then
7911 qualifying type must certainly be complete. */
7913 /* A friend declaration of "T::f" is OK, even if
7914 "T" is a template parameter. But, if this
7915 function is not a friend, the qualifying type
7917 || (!friendp && !CLASS_TYPE_P (ctype))
7918 /* For a declaration, the type need not be
7919 complete, if either it is dependent (since there
7920 is no meaningful definition of complete in that
7921 case) or the qualifying class is currently being
7923 || !(dependent_type_p (ctype)
7924 || currently_open_class (ctype)))
7925 /* Check that the qualifying type is complete. */
7926 && !complete_type_or_else (ctype, NULL_TREE))
7927 return error_mark_node;
7928 else if (TREE_CODE (type) == FUNCTION_TYPE)
7930 tree sname = declarator->u.id.unqualified_name;
7932 if (current_class_type
7933 && (!friendp || funcdef_flag))
7936 ? "cannot define member function %<%T::%s%> within %<%T%>"
7937 : "cannot declare member function %<%T::%s%> within %<%T%>",
7938 ctype, name, current_class_type);
7939 return error_mark_node;
7942 if (TREE_CODE (sname) == IDENTIFIER_NODE
7943 && NEW_DELETE_OPNAME_P (sname))
7944 /* Overloaded operator new and operator delete
7945 are always static functions. */
7948 type = build_memfn_type (type, ctype, memfn_quals);
7950 else if (declspecs->specs[(int)ds_typedef]
7951 && current_class_type)
7953 error ("cannot declare member %<%T::%s%> within %qT",
7954 ctype, name, current_class_type);
7955 return error_mark_node;
7959 /* Now TYPE has the actual type. */
7964 *attrlist = chainon (returned_attrs, *attrlist);
7966 attrlist = &returned_attrs;
7969 /* Handle parameter packs. */
7970 if (parameter_pack_p)
7972 if (decl_context == PARM)
7973 /* Turn the type into a pack expansion.*/
7974 type = make_pack_expansion (type);
7976 error ("non-parameter %qs cannot be a parameter pack", name);
7979 /* Did array size calculations overflow? */
7981 if (TREE_CODE (type) == ARRAY_TYPE
7982 && COMPLETE_TYPE_P (type)
7983 && TREE_CODE (TYPE_SIZE_UNIT (type)) == INTEGER_CST
7984 && TREE_OVERFLOW (TYPE_SIZE_UNIT (type)))
7986 error ("size of array %qs is too large", name);
7987 /* If we proceed with the array type as it is, we'll eventually
7988 crash in tree_low_cst(). */
7989 type = error_mark_node;
7992 if ((decl_context == FIELD || decl_context == PARM)
7993 && !processing_template_decl
7994 && variably_modified_type_p (type, NULL_TREE))
7996 if (decl_context == FIELD)
7997 error ("data member may not have variably modified type %qT", type);
7999 error ("parameter may not have variably modified type %qT", type);
8000 type = error_mark_node;
8003 if (explicitp == 1 || (explicitp && friendp))
8005 /* [dcl.fct.spec] The explicit specifier shall only be used in
8006 declarations of constructors within a class definition. */
8007 error ("only declarations of constructors can be %<explicit%>");
8011 if (storage_class == sc_mutable)
8013 if (decl_context != FIELD || friendp)
8015 error ("non-member %qs cannot be declared %<mutable%>", name);
8016 storage_class = sc_none;
8018 else if (decl_context == TYPENAME || declspecs->specs[(int)ds_typedef])
8020 error ("non-object member %qs cannot be declared %<mutable%>", name);
8021 storage_class = sc_none;
8023 else if (TREE_CODE (type) == FUNCTION_TYPE
8024 || TREE_CODE (type) == METHOD_TYPE)
8026 error ("function %qs cannot be declared %<mutable%>", name);
8027 storage_class = sc_none;
8031 error ("static %qs cannot be declared %<mutable%>", name);
8032 storage_class = sc_none;
8034 else if (type_quals & TYPE_QUAL_CONST)
8036 error ("const %qs cannot be declared %<mutable%>", name);
8037 storage_class = sc_none;
8041 /* If this is declaring a typedef name, return a TYPE_DECL. */
8042 if (declspecs->specs[(int)ds_typedef] && decl_context != TYPENAME)
8046 /* Note that the grammar rejects storage classes
8047 in typenames, fields or parameters. */
8048 if (current_lang_name == lang_name_java)
8049 TYPE_FOR_JAVA (type) = 1;
8051 /* This declaration:
8053 typedef void f(int) const;
8055 declares a function type which is not a member of any
8056 particular class, but which is cv-qualified; for
8057 example "f S::*" declares a pointer to a const-qualified
8058 member function of S. We record the cv-qualification in the
8060 if (memfn_quals && TREE_CODE (type) == FUNCTION_TYPE)
8062 type = cp_build_qualified_type (type, memfn_quals);
8064 /* We have now dealt with these qualifiers. */
8065 memfn_quals = TYPE_UNQUALIFIED;
8068 if (decl_context == FIELD)
8069 decl = build_lang_decl (TYPE_DECL, unqualified_id, type);
8071 decl = build_decl (TYPE_DECL, unqualified_id, type);
8072 if (id_declarator && declarator->u.id.qualifying_scope)
8073 error ("%Jtypedef name may not be a nested-name-specifier", decl);
8075 if (decl_context != FIELD)
8077 if (!current_function_decl)
8078 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
8079 else if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (current_function_decl)
8080 || (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P
8081 (current_function_decl)))
8082 /* The TYPE_DECL is "abstract" because there will be
8083 clones of this constructor/destructor, and there will
8084 be copies of this TYPE_DECL generated in those
8086 DECL_ABSTRACT (decl) = 1;
8088 else if (constructor_name_p (unqualified_id, current_class_type))
8089 pedwarn ("ISO C++ forbids nested type %qD with same name "
8090 "as enclosing class",
8093 /* If the user declares "typedef struct {...} foo" then the
8094 struct will have an anonymous name. Fill that name in now.
8095 Nothing can refer to it, so nothing needs know about the name
8097 if (type != error_mark_node
8100 && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
8101 && TYPE_ANONYMOUS_P (type)
8102 /* Don't do this if there are attributes. */
8103 && (!attrlist || !*attrlist)
8104 && cp_type_quals (type) == TYPE_UNQUALIFIED)
8106 tree oldname = TYPE_NAME (type);
8109 /* Replace the anonymous name with the real name everywhere. */
8110 for (t = TYPE_MAIN_VARIANT (type); t; t = TYPE_NEXT_VARIANT (t))
8111 if (TYPE_NAME (t) == oldname)
8112 TYPE_NAME (t) = decl;
8114 if (TYPE_LANG_SPECIFIC (type))
8115 TYPE_WAS_ANONYMOUS (type) = 1;
8117 /* If this is a typedef within a template class, the nested
8118 type is a (non-primary) template. The name for the
8119 template needs updating as well. */
8120 if (TYPE_LANG_SPECIFIC (type) && CLASSTYPE_TEMPLATE_INFO (type))
8121 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type))
8122 = TYPE_IDENTIFIER (type);
8124 /* FIXME remangle member functions; member functions of a
8125 type with external linkage have external linkage. */
8129 || (typedef_decl && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl)))
8130 C_TYPEDEF_EXPLICITLY_SIGNED (decl) = 1;
8132 bad_specifiers (decl, "type", virtualp,
8133 memfn_quals != TYPE_UNQUALIFIED,
8134 inlinep, friendp, raises != NULL_TREE);
8139 /* Detect the case of an array type of unspecified size
8140 which came, as such, direct from a typedef name.
8141 We must copy the type, so that the array's domain can be
8142 individually set by the object's initializer. */
8144 if (type && typedef_type
8145 && TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type)
8146 && TYPE_MAIN_VARIANT (type) == TYPE_MAIN_VARIANT (typedef_type))
8147 type = build_cplus_array_type (TREE_TYPE (type), NULL_TREE);
8149 /* Detect where we're using a typedef of function type to declare a
8150 function. PARMS will not be set, so we must create it now. */
8152 if (type == typedef_type && TREE_CODE (type) == FUNCTION_TYPE)
8154 tree decls = NULL_TREE;
8157 for (args = TYPE_ARG_TYPES (type); args; args = TREE_CHAIN (args))
8159 tree decl = cp_build_parm_decl (NULL_TREE, TREE_VALUE (args));
8161 TREE_CHAIN (decl) = decls;
8165 parms = nreverse (decls);
8167 if (decl_context != TYPENAME)
8169 /* A cv-qualifier-seq shall only be part of the function type
8170 for a non-static member function. [8.3.5/4 dcl.fct] */
8171 if (cp_type_quals (type) != TYPE_UNQUALIFIED
8172 && (current_class_type == NULL_TREE || staticp) )
8175 ? G_("qualified function types cannot be used to "
8176 "declare static member functions")
8177 : G_("qualified function types cannot be used to "
8178 "declare free functions"));
8179 type = TYPE_MAIN_VARIANT (type);
8182 /* The qualifiers on the function type become the qualifiers on
8183 the non-static member function. */
8184 memfn_quals |= cp_type_quals (type);
8188 /* If this is a type name (such as, in a cast or sizeof),
8189 compute the type and return it now. */
8191 if (decl_context == TYPENAME)
8193 /* Note that the grammar rejects storage classes
8194 in typenames, fields or parameters. */
8195 if (type_quals != TYPE_UNQUALIFIED)
8196 type_quals = TYPE_UNQUALIFIED;
8198 /* Special case: "friend class foo" looks like a TYPENAME context. */
8201 if (type_quals != TYPE_UNQUALIFIED)
8203 error ("type qualifiers specified for friend class declaration");
8204 type_quals = TYPE_UNQUALIFIED;
8208 error ("%<inline%> specified for friend class declaration");
8214 /* Don't allow friend declaration without a class-key. */
8215 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
8216 pedwarn ("template parameters cannot be friends");
8217 else if (TREE_CODE (type) == TYPENAME_TYPE)
8218 pedwarn ("friend declaration requires class-key, "
8219 "i.e. %<friend class %T::%D%>",
8220 TYPE_CONTEXT (type), TYPENAME_TYPE_FULLNAME (type));
8222 pedwarn ("friend declaration requires class-key, "
8223 "i.e. %<friend %#T%>",
8227 /* Only try to do this stuff if we didn't already give up. */
8228 if (type != integer_type_node)
8230 /* A friendly class? */
8231 if (current_class_type)
8232 make_friend_class (current_class_type, TYPE_MAIN_VARIANT (type),
8235 error ("trying to make class %qT a friend of global scope",
8238 type = void_type_node;
8241 else if (memfn_quals)
8243 if (ctype == NULL_TREE)
8245 if (TREE_CODE (type) != METHOD_TYPE)
8246 error ("invalid qualifiers on non-member function type");
8248 ctype = TYPE_METHOD_BASETYPE (type);
8251 type = build_memfn_type (type, ctype, memfn_quals);
8256 else if (unqualified_id == NULL_TREE && decl_context != PARM
8257 && decl_context != CATCHPARM
8258 && TREE_CODE (type) != UNION_TYPE
8261 error ("abstract declarator %qT used as declaration", type);
8262 return error_mark_node;
8265 /* Only functions may be declared using an operator-function-id. */
8267 && IDENTIFIER_OPNAME_P (unqualified_id)
8268 && TREE_CODE (type) != FUNCTION_TYPE
8269 && TREE_CODE (type) != METHOD_TYPE)
8271 error ("declaration of %qD as non-function", unqualified_id);
8272 return error_mark_node;
8275 /* We don't check parameter types here because we can emit a better
8276 error message later. */
8277 if (decl_context != PARM)
8279 type = check_var_type (unqualified_id, type);
8280 if (type == error_mark_node)
8281 return error_mark_node;
8284 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
8285 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
8287 if (decl_context == PARM || decl_context == CATCHPARM)
8289 if (ctype || in_namespace)
8290 error ("cannot use %<::%> in parameter declaration");
8292 /* A parameter declared as an array of T is really a pointer to T.
8293 One declared as a function is really a pointer to a function.
8294 One declared as a member is really a pointer to member. */
8296 if (TREE_CODE (type) == ARRAY_TYPE)
8298 /* Transfer const-ness of array into that of type pointed to. */
8299 type = build_pointer_type (TREE_TYPE (type));
8300 type_quals = TYPE_UNQUALIFIED;
8302 else if (TREE_CODE (type) == FUNCTION_TYPE)
8303 type = build_pointer_type (type);
8309 if (decl_context == PARM)
8311 decl = cp_build_parm_decl (unqualified_id, type);
8313 bad_specifiers (decl, "parameter", virtualp,
8314 memfn_quals != TYPE_UNQUALIFIED,
8315 inlinep, friendp, raises != NULL_TREE);
8317 else if (decl_context == FIELD)
8319 /* The C99 flexible array extension. */
8320 if (!staticp && TREE_CODE (type) == ARRAY_TYPE
8321 && TYPE_DOMAIN (type) == NULL_TREE)
8323 tree itype = compute_array_index_type (dname, integer_zero_node);
8324 type = build_cplus_array_type (TREE_TYPE (type), itype);
8327 if (type == error_mark_node)
8329 /* Happens when declaring arrays of sizes which
8330 are error_mark_node, for example. */
8333 else if (in_namespace && !friendp)
8335 /* Something like struct S { int N::j; }; */
8336 error ("invalid use of %<::%>");
8337 return error_mark_node;
8339 else if (TREE_CODE (type) == FUNCTION_TYPE)
8342 tree function_context;
8346 if (ctype == NULL_TREE)
8347 ctype = current_class_type;
8349 if (ctype == NULL_TREE)
8351 error ("can't make %qD into a method -- not in a class",
8353 return error_mark_node;
8356 /* ``A union may [ ... ] not [ have ] virtual functions.''
8358 if (virtualp && TREE_CODE (ctype) == UNION_TYPE)
8360 error ("function %qD declared virtual inside a union",
8362 return error_mark_node;
8365 if (NEW_DELETE_OPNAME_P (unqualified_id))
8369 error ("%qD cannot be declared virtual, since it "
8375 else if (staticp < 2)
8376 type = build_memfn_type (type, ctype, memfn_quals);
8379 /* Check that the name used for a destructor makes sense. */
8380 if (sfk == sfk_destructor)
8384 gcc_assert (friendp);
8385 error ("expected qualified name in friend declaration "
8386 "for destructor %qD",
8387 id_declarator->u.id.unqualified_name);
8388 return error_mark_node;
8391 if (!same_type_p (TREE_OPERAND
8392 (id_declarator->u.id.unqualified_name, 0),
8395 error ("declaration of %qD as member of %qT",
8396 id_declarator->u.id.unqualified_name, ctype);
8397 return error_mark_node;
8401 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
8402 function_context = (ctype != NULL_TREE) ?
8403 decl_function_context (TYPE_MAIN_DECL (ctype)) : NULL_TREE;
8404 publicp = (! friendp || ! staticp)
8405 && function_context == NULL_TREE;
8406 decl = grokfndecl (ctype, type,
8407 TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
8408 ? unqualified_id : dname,
8411 virtualp, flags, memfn_quals, raises,
8412 friendp ? -1 : 0, friendp, publicp, inlinep,
8414 funcdef_flag, template_count, in_namespace, attrlist);
8415 if (decl == NULL_TREE)
8416 return error_mark_node;
8418 /* This clobbers the attrs stored in `decl' from `attrlist'. */
8419 /* The decl and setting of decl_attr is also turned off. */
8420 decl = build_decl_attribute_variant (decl, decl_attr);
8423 /* [class.conv.ctor]
8425 A constructor declared without the function-specifier
8426 explicit that can be called with a single parameter
8427 specifies a conversion from the type of its first
8428 parameter to the type of its class. Such a constructor
8429 is called a converting constructor. */
8431 DECL_NONCONVERTING_P (decl) = 1;
8432 else if (DECL_CONSTRUCTOR_P (decl))
8434 /* The constructor can be called with exactly one
8435 parameter if there is at least one parameter, and
8436 any subsequent parameters have default arguments.
8437 Ignore any compiler-added parms. */
8438 tree arg_types = FUNCTION_FIRST_USER_PARMTYPE (decl);
8440 if (arg_types == void_list_node
8442 && TREE_CHAIN (arg_types)
8443 && TREE_CHAIN (arg_types) != void_list_node
8444 && !TREE_PURPOSE (TREE_CHAIN (arg_types))))
8445 DECL_NONCONVERTING_P (decl) = 1;
8448 else if (TREE_CODE (type) == METHOD_TYPE)
8450 /* We only get here for friend declarations of
8451 members of other classes. */
8452 /* All method decls are public, so tell grokfndecl to set
8453 TREE_PUBLIC, also. */
8454 decl = grokfndecl (ctype, type,
8455 TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
8456 ? unqualified_id : dname,
8459 virtualp, flags, memfn_quals, raises,
8460 friendp ? -1 : 0, friendp, 1, 0, sfk,
8461 funcdef_flag, template_count, in_namespace,
8463 if (decl == NULL_TREE)
8464 return error_mark_node;
8466 else if (!staticp && !dependent_type_p (type)
8467 && !COMPLETE_TYPE_P (complete_type (type))
8468 && (TREE_CODE (type) != ARRAY_TYPE || initialized == 0))
8471 error ("field %qD has incomplete type", unqualified_id);
8473 error ("name %qT has incomplete type", type);
8475 /* If we're instantiating a template, tell them which
8476 instantiation made the field's type be incomplete. */
8477 if (current_class_type
8478 && TYPE_NAME (current_class_type)
8479 && IDENTIFIER_TEMPLATE (TYPE_IDENTIFIER (current_class_type))
8481 && declspecs->type == type)
8482 error (" in instantiation of template %qT",
8483 current_class_type);
8485 return error_mark_node;
8491 error ("%qE is neither function nor member function; "
8492 "cannot be declared friend", unqualified_id);
8500 /* Friends are treated specially. */
8501 if (ctype == current_class_type)
8502 ; /* We already issued a pedwarn. */
8503 else if (decl && DECL_NAME (decl))
8505 if (template_class_depth (current_class_type) == 0)
8507 decl = check_explicit_specialization
8508 (unqualified_id, decl, template_count,
8509 2 * funcdef_flag + 4);
8510 if (decl == error_mark_node)
8511 return error_mark_node;
8514 decl = do_friend (ctype, unqualified_id, decl,
8520 return error_mark_node;
8523 /* Structure field. It may not be a function, except for C++. */
8525 if (decl == NULL_TREE)
8531 /* An attempt is being made to initialize a non-static
8532 member. But, from [class.mem]:
8534 4 A member-declarator can contain a
8535 constant-initializer only if it declares a static
8536 member (_class.static_) of integral or enumeration
8537 type, see _class.static.data_.
8539 This used to be relatively common practice, but
8540 the rest of the compiler does not correctly
8541 handle the initialization unless the member is
8542 static so we make it static below. */
8543 pedwarn ("ISO C++ forbids initialization of member %qD",
8545 pedwarn ("making %qD static", unqualified_id);
8549 if (uses_template_parms (type))
8550 /* We'll check at instantiation time. */
8552 else if (check_static_variable_definition (unqualified_id,
8554 /* If we just return the declaration, crashes
8555 will sometimes occur. We therefore return
8556 void_type_node, as if this was a friend
8557 declaration, to cause callers to completely
8558 ignore this declaration. */
8559 return error_mark_node;
8564 /* C++ allows static class members. All other work
8565 for this is done by grokfield. */
8566 decl = build_lang_decl (VAR_DECL, unqualified_id, type);
8567 set_linkage_for_static_data_member (decl);
8568 /* Even if there is an in-class initialization, DECL
8569 is considered undefined until an out-of-class
8570 definition is provided. */
8571 DECL_EXTERNAL (decl) = 1;
8574 DECL_TLS_MODEL (decl) = decl_default_tls_model (decl);
8578 decl = build_decl (FIELD_DECL, unqualified_id, type);
8579 DECL_NONADDRESSABLE_P (decl) = bitfield;
8580 if (bitfield && !unqualified_id)
8581 TREE_NO_WARNING (decl) = 1;
8583 if (storage_class == sc_mutable)
8585 DECL_MUTABLE_P (decl) = 1;
8586 storage_class = sc_none;
8590 bad_specifiers (decl, "field", virtualp,
8591 memfn_quals != TYPE_UNQUALIFIED,
8592 inlinep, friendp, raises != NULL_TREE);
8595 else if (TREE_CODE (type) == FUNCTION_TYPE
8596 || TREE_CODE (type) == METHOD_TYPE)
8601 if (!unqualified_id)
8602 return error_mark_node;
8604 if (TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR)
8605 original_name = dname;
8607 original_name = unqualified_id;
8609 if (storage_class == sc_auto)
8610 error ("storage class %<auto%> invalid for function %qs", name);
8611 else if (storage_class == sc_register)
8612 error ("storage class %<register%> invalid for function %qs", name);
8614 error ("storage class %<__thread%> invalid for function %qs", name);
8616 /* Function declaration not at top level.
8617 Storage classes other than `extern' are not allowed
8618 and `extern' makes no difference. */
8619 if (! toplevel_bindings_p ()
8620 && (storage_class == sc_static
8621 || declspecs->specs[(int)ds_inline])
8624 if (storage_class == sc_static)
8625 pedwarn ("%<static%> specified invalid for function %qs "
8626 "declared out of global scope", name);
8628 pedwarn ("%<inline%> specifier invalid for function %qs "
8629 "declared out of global scope", name);
8632 if (ctype == NULL_TREE)
8636 error ("virtual non-class function %qs", name);
8640 else if (TREE_CODE (type) == FUNCTION_TYPE && staticp < 2
8641 && !NEW_DELETE_OPNAME_P (original_name))
8642 type = build_method_type_directly (ctype,
8644 TYPE_ARG_TYPES (type));
8646 /* Record presence of `static'. */
8647 publicp = (ctype != NULL_TREE
8648 || storage_class == sc_extern
8649 || storage_class != sc_static);
8651 decl = grokfndecl (ctype, type, original_name, parms, unqualified_id,
8652 virtualp, flags, memfn_quals, raises,
8654 publicp, inlinep, sfk, funcdef_flag,
8655 template_count, in_namespace, attrlist);
8656 if (decl == NULL_TREE)
8657 return error_mark_node;
8661 int invalid_static = 0;
8663 /* Don't allow a static member function in a class, and forbid
8664 declaring main to be static. */
8665 if (TREE_CODE (type) == METHOD_TYPE)
8667 pedwarn ("cannot declare member function %qD to have "
8668 "static linkage", decl);
8671 else if (current_function_decl)
8673 /* FIXME need arm citation */
8674 error ("cannot declare static function inside another function");
8681 storage_class = sc_none;
8687 /* It's a variable. */
8689 /* An uninitialized decl with `extern' is a reference. */
8690 decl = grokvardecl (type, unqualified_id,
8693 (type_quals & TYPE_QUAL_CONST) != 0,
8694 ctype ? ctype : in_namespace);
8695 bad_specifiers (decl, "variable", virtualp,
8696 memfn_quals != TYPE_UNQUALIFIED,
8697 inlinep, friendp, raises != NULL_TREE);
8701 DECL_CONTEXT (decl) = ctype;
8704 pedwarn ("%<static%> may not be used when defining "
8705 "(as opposed to declaring) a static data member");
8707 storage_class = sc_none;
8709 if (storage_class == sc_register && TREE_STATIC (decl))
8711 error ("static member %qD declared %<register%>", decl);
8712 storage_class = sc_none;
8714 if (storage_class == sc_extern && pedantic)
8716 pedwarn ("cannot explicitly declare member %q#D to have "
8719 storage_class = sc_none;
8724 /* Record `register' declaration for warnings on &
8725 and in case doing stupid register allocation. */
8727 if (storage_class == sc_register)
8728 DECL_REGISTER (decl) = 1;
8729 else if (storage_class == sc_extern)
8730 DECL_THIS_EXTERN (decl) = 1;
8731 else if (storage_class == sc_static)
8732 DECL_THIS_STATIC (decl) = 1;
8734 /* Record constancy and volatility. There's no need to do this
8735 when processing a template; we'll do this for the instantiated
8736 declaration based on the type of DECL. */
8737 if (!processing_template_decl)
8738 cp_apply_type_quals_to_decl (type_quals, decl);
8741 TREE_NO_WARNING (decl) = 1;
8747 /* Subroutine of start_function. Ensure that each of the parameter
8748 types (as listed in PARMS) is complete, as is required for a
8749 function definition. */
8752 require_complete_types_for_parms (tree parms)
8754 for (; parms; parms = TREE_CHAIN (parms))
8756 if (dependent_type_p (TREE_TYPE (parms)))
8758 if (!VOID_TYPE_P (TREE_TYPE (parms))
8759 && complete_type_or_else (TREE_TYPE (parms), parms))
8761 relayout_decl (parms);
8762 DECL_ARG_TYPE (parms) = type_passed_as (TREE_TYPE (parms));
8765 /* grokparms or complete_type_or_else will have already issued
8767 TREE_TYPE (parms) = error_mark_node;
8771 /* Returns nonzero if T is a local variable. */
8774 local_variable_p (tree t)
8776 if ((TREE_CODE (t) == VAR_DECL
8777 /* A VAR_DECL with a context that is a _TYPE is a static data
8779 && !TYPE_P (CP_DECL_CONTEXT (t))
8780 /* Any other non-local variable must be at namespace scope. */
8781 && !DECL_NAMESPACE_SCOPE_P (t))
8782 || (TREE_CODE (t) == PARM_DECL))
8788 /* Returns nonzero if T is an automatic local variable or a label.
8789 (These are the declarations that need to be remapped when the code
8790 containing them is duplicated.) */
8793 nonstatic_local_decl_p (tree t)
8795 return ((local_variable_p (t) && !TREE_STATIC (t))
8796 || TREE_CODE (t) == LABEL_DECL
8797 || TREE_CODE (t) == RESULT_DECL);
8800 /* Like local_variable_p, but suitable for use as a tree-walking
8804 local_variable_p_walkfn (tree *tp, int *walk_subtrees,
8805 void *data ATTRIBUTE_UNUSED)
8807 if (local_variable_p (*tp) && !DECL_ARTIFICIAL (*tp))
8809 else if (TYPE_P (*tp))
8816 /* Check that ARG, which is a default-argument expression for a
8817 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
8818 something goes wrong. DECL may also be a _TYPE node, rather than a
8819 DECL, if there is no DECL available. */
8822 check_default_argument (tree decl, tree arg)
8827 if (TREE_CODE (arg) == DEFAULT_ARG)
8828 /* We get a DEFAULT_ARG when looking at an in-class declaration
8829 with a default argument. Ignore the argument for now; we'll
8830 deal with it after the class is complete. */
8839 decl_type = TREE_TYPE (decl);
8841 if (arg == error_mark_node
8842 || decl == error_mark_node
8843 || TREE_TYPE (arg) == error_mark_node
8844 || decl_type == error_mark_node)
8845 /* Something already went wrong. There's no need to check
8847 return error_mark_node;
8849 /* [dcl.fct.default]
8851 A default argument expression is implicitly converted to the
8853 if (!TREE_TYPE (arg)
8854 || !can_convert_arg (decl_type, TREE_TYPE (arg), arg, LOOKUP_NORMAL))
8857 error ("default argument for %q#D has type %qT",
8858 decl, TREE_TYPE (arg));
8860 error ("default argument for parameter of type %qT has type %qT",
8861 decl_type, TREE_TYPE (arg));
8863 return error_mark_node;
8866 /* [dcl.fct.default]
8868 Local variables shall not be used in default argument
8871 The keyword `this' shall not be used in a default argument of a
8873 var = walk_tree_without_duplicates (&arg, local_variable_p_walkfn,
8877 error ("default argument %qE uses local variable %qD", arg, var);
8878 return error_mark_node;
8885 /* Decode the list of parameter types for a function type.
8886 Given the list of things declared inside the parens,
8887 return a list of types.
8889 If this parameter does not end with an ellipsis, we append
8892 *PARMS is set to the chain of PARM_DECLs created. */
8895 grokparms (cp_parameter_declarator *first_parm, tree *parms)
8897 tree result = NULL_TREE;
8898 tree decls = NULL_TREE;
8899 int ellipsis = !first_parm || first_parm->ellipsis_p;
8900 cp_parameter_declarator *parm;
8902 struct pointer_set_t *unique_decls = pointer_set_create ();
8904 for (parm = first_parm; parm != NULL; parm = parm->next)
8906 tree type = NULL_TREE;
8907 tree init = parm->default_argument;
8911 if (parm == no_parameters)
8914 attrs = parm->decl_specifiers.attributes;
8915 parm->decl_specifiers.attributes = NULL_TREE;
8916 decl = grokdeclarator (parm->declarator, &parm->decl_specifiers,
8917 PARM, init != NULL_TREE, &attrs);
8918 if (! decl || TREE_TYPE (decl) == error_mark_node)
8922 cplus_decl_attributes (&decl, attrs, 0);
8924 type = TREE_TYPE (decl);
8925 if (VOID_TYPE_P (type))
8927 if (same_type_p (type, void_type_node)
8928 && DECL_SELF_REFERENCE_P (type)
8929 && !DECL_NAME (decl) && !result && !parm->next && !ellipsis)
8930 /* this is a parmlist of `(void)', which is ok. */
8932 cxx_incomplete_type_error (decl, type);
8933 /* It's not a good idea to actually create parameters of
8934 type `void'; other parts of the compiler assume that a
8935 void type terminates the parameter list. */
8936 type = error_mark_node;
8937 TREE_TYPE (decl) = error_mark_node;
8940 if (type != error_mark_node)
8942 /* Top-level qualifiers on the parameters are
8943 ignored for function types. */
8944 type = cp_build_qualified_type (type, 0);
8945 if (TREE_CODE (type) == METHOD_TYPE)
8947 error ("parameter %qD invalidly declared method type", decl);
8948 type = build_pointer_type (type);
8949 TREE_TYPE (decl) = type;
8951 else if (abstract_virtuals_error (decl, type))
8952 any_error = 1; /* Seems like a good idea. */
8953 else if (POINTER_TYPE_P (type))
8955 /* [dcl.fct]/6, parameter types cannot contain pointers
8956 (references) to arrays of unknown bound. */
8957 tree t = TREE_TYPE (type);
8958 int ptr = TYPE_PTR_P (type);
8964 else if (TREE_CODE (t) != ARRAY_TYPE)
8966 else if (!TYPE_DOMAIN (t))
8970 if (TREE_CODE (t) == ARRAY_TYPE)
8971 error ("parameter %qD includes %s to array of unknown "
8973 decl, ptr ? "pointer" : "reference", t);
8978 else if (init && !processing_template_decl)
8979 init = check_default_argument (decl, init);
8982 if (TREE_CODE (decl) == PARM_DECL
8983 && FUNCTION_PARAMETER_PACK_P (decl)
8985 error ("parameter packs must be at the end of the parameter list");
8987 if (DECL_NAME (decl))
8989 if (pointer_set_contains (unique_decls, DECL_NAME (decl)))
8990 error ("multiple parameters named %qE", DECL_NAME (decl));
8992 pointer_set_insert (unique_decls, DECL_NAME (decl));
8995 TREE_CHAIN (decl) = decls;
8997 result = tree_cons (init, type, result);
8999 decls = nreverse (decls);
9000 result = nreverse (result);
9002 result = chainon (result, void_list_node);
9005 pointer_set_destroy (unique_decls);
9010 /* D is a constructor or overloaded `operator='.
9012 Let T be the class in which D is declared. Then, this function
9015 -1 if D's is an ill-formed constructor or copy assignment operator
9016 whose first parameter is of type `T'.
9017 0 if D is not a copy constructor or copy assignment
9019 1 if D is a copy constructor or copy assignment operator whose
9020 first parameter is a reference to const qualified T.
9021 2 if D is a copy constructor or copy assignment operator whose
9022 first parameter is a reference to non-const qualified T.
9024 This function can be used as a predicate. Positive values indicate
9025 a copy constructor and nonzero values indicate a copy assignment
9035 gcc_assert (DECL_FUNCTION_MEMBER_P (d));
9037 if (TREE_CODE (d) == TEMPLATE_DECL
9038 || (DECL_TEMPLATE_INFO (d)
9039 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d))))
9040 /* Instantiations of template member functions are never copy
9041 functions. Note that member functions of templated classes are
9042 represented as template functions internally, and we must
9043 accept those as copy functions. */
9046 args = FUNCTION_FIRST_USER_PARMTYPE (d);
9050 arg_type = TREE_VALUE (args);
9051 if (arg_type == error_mark_node)
9054 if (TYPE_MAIN_VARIANT (arg_type) == DECL_CONTEXT (d))
9056 /* Pass by value copy assignment operator. */
9059 else if (TREE_CODE (arg_type) == REFERENCE_TYPE
9060 && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type)) == DECL_CONTEXT (d))
9062 if (CP_TYPE_CONST_P (TREE_TYPE (arg_type)))
9068 args = TREE_CHAIN (args);
9070 if (args && args != void_list_node && !TREE_PURPOSE (args))
9071 /* There are more non-optional args. */
9077 /* Remember any special properties of member function DECL. */
9079 void grok_special_member_properties (tree decl)
9083 if (!DECL_NONSTATIC_MEMBER_FUNCTION_P (decl))
9086 class_type = DECL_CONTEXT (decl);
9087 if (DECL_CONSTRUCTOR_P (decl))
9089 int ctor = copy_fn_p (decl);
9091 TYPE_HAS_CONSTRUCTOR (class_type) = 1;
9097 A non-template constructor for class X is a copy
9098 constructor if its first parameter is of type X&, const
9099 X&, volatile X& or const volatile X&, and either there
9100 are no other parameters or else all other parameters have
9101 default arguments. */
9102 TYPE_HAS_INIT_REF (class_type) = 1;
9104 TYPE_HAS_CONST_INIT_REF (class_type) = 1;
9106 else if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl)))
9107 TYPE_HAS_DEFAULT_CONSTRUCTOR (class_type) = 1;
9109 else if (DECL_OVERLOADED_OPERATOR_P (decl) == NOP_EXPR)
9113 A non-template assignment operator for class X is a copy
9114 assignment operator if its parameter is of type X, X&, const
9115 X&, volatile X& or const volatile X&. */
9117 int assop = copy_fn_p (decl);
9121 TYPE_HAS_ASSIGN_REF (class_type) = 1;
9123 TYPE_HAS_CONST_ASSIGN_REF (class_type) = 1;
9128 /* Check a constructor DECL has the correct form. Complains
9129 if the class has a constructor of the form X(X). */
9132 grok_ctor_properties (tree ctype, tree decl)
9134 int ctor_parm = copy_fn_p (decl);
9140 A declaration of a constructor for a class X is ill-formed if
9141 its first parameter is of type (optionally cv-qualified) X
9142 and either there are no other parameters or else all other
9143 parameters have default arguments.
9145 We *don't* complain about member template instantiations that
9146 have this form, though; they can occur as we try to decide
9147 what constructor to use during overload resolution. Since
9148 overload resolution will never prefer such a constructor to
9149 the non-template copy constructor (which is either explicitly
9150 or implicitly defined), there's no need to worry about their
9151 existence. Theoretically, they should never even be
9152 instantiated, but that's hard to forestall. */
9153 error ("invalid constructor; you probably meant %<%T (const %T&)%>",
9161 /* An operator with this code is unary, but can also be binary. */
9164 ambi_op_p (enum tree_code code)
9166 return (code == INDIRECT_REF
9167 || code == ADDR_EXPR
9168 || code == UNARY_PLUS_EXPR
9169 || code == NEGATE_EXPR
9170 || code == PREINCREMENT_EXPR
9171 || code == PREDECREMENT_EXPR);
9174 /* An operator with this name can only be unary. */
9177 unary_op_p (enum tree_code code)
9179 return (code == TRUTH_NOT_EXPR
9180 || code == BIT_NOT_EXPR
9181 || code == COMPONENT_REF
9182 || code == TYPE_EXPR);
9185 /* DECL is a declaration for an overloaded operator. If COMPLAIN is true,
9186 errors are issued for invalid declarations. */
9189 grok_op_properties (tree decl, bool complain)
9191 tree argtypes = TYPE_ARG_TYPES (TREE_TYPE (decl));
9193 int methodp = (TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE);
9194 tree name = DECL_NAME (decl);
9195 enum tree_code operator_code;
9200 /* Count the number of arguments and check for ellipsis. */
9201 for (argtype = argtypes, arity = 0;
9202 argtype && argtype != void_list_node;
9203 argtype = TREE_CHAIN (argtype))
9205 ellipsis_p = !argtype;
9207 class_type = DECL_CONTEXT (decl);
9208 if (class_type && !CLASS_TYPE_P (class_type))
9209 class_type = NULL_TREE;
9211 if (DECL_CONV_FN_P (decl))
9212 operator_code = TYPE_EXPR;
9216 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
9217 if (ansi_opname (CODE) == name) \
9219 operator_code = (CODE); \
9222 else if (ansi_assopname (CODE) == name) \
9224 operator_code = (CODE); \
9225 DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
9229 #include "operators.def"
9235 gcc_assert (operator_code != LAST_CPLUS_TREE_CODE);
9236 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
9239 switch (operator_code)
9242 TYPE_HAS_NEW_OPERATOR (class_type) = 1;
9246 TYPE_GETS_DELETE (class_type) |= 1;
9250 TYPE_HAS_ARRAY_NEW_OPERATOR (class_type) = 1;
9253 case VEC_DELETE_EXPR:
9254 TYPE_GETS_DELETE (class_type) |= 2;
9261 /* [basic.std.dynamic.allocation]/1:
9263 A program is ill-formed if an allocation function is declared
9264 in a namespace scope other than global scope or declared static
9267 The same also holds true for deallocation functions. */
9268 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR
9269 || operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
9271 if (DECL_NAMESPACE_SCOPE_P (decl))
9273 if (CP_DECL_CONTEXT (decl) != global_namespace)
9275 error ("%qD may not be declared within a namespace", decl);
9278 else if (!TREE_PUBLIC (decl))
9280 error ("%qD may not be declared as static", decl);
9286 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR)
9287 TREE_TYPE (decl) = coerce_new_type (TREE_TYPE (decl));
9288 else if (operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
9289 TREE_TYPE (decl) = coerce_delete_type (TREE_TYPE (decl));
9292 /* An operator function must either be a non-static member function
9293 or have at least one parameter of a class, a reference to a class,
9294 an enumeration, or a reference to an enumeration. 13.4.0.6 */
9295 if (! methodp || DECL_STATIC_FUNCTION_P (decl))
9297 if (operator_code == TYPE_EXPR
9298 || operator_code == CALL_EXPR
9299 || operator_code == COMPONENT_REF
9300 || operator_code == ARRAY_REF
9301 || operator_code == NOP_EXPR)
9303 error ("%qD must be a nonstatic member function", decl);
9310 if (DECL_STATIC_FUNCTION_P (decl))
9312 error ("%qD must be either a non-static member "
9313 "function or a non-member function", decl);
9317 for (p = argtypes; p && p != void_list_node; p = TREE_CHAIN (p))
9319 tree arg = non_reference (TREE_VALUE (p));
9320 if (arg == error_mark_node)
9323 /* IS_AGGR_TYPE, rather than CLASS_TYPE_P, is used
9324 because these checks are performed even on
9325 template functions. */
9326 if (IS_AGGR_TYPE (arg) || TREE_CODE (arg) == ENUMERAL_TYPE)
9330 if (!p || p == void_list_node)
9333 error ("%qD must have an argument of class or "
9334 "enumerated type", decl);
9340 /* There are no restrictions on the arguments to an overloaded
9342 if (operator_code == CALL_EXPR)
9345 /* Warn about conversion operators that will never be used. */
9346 if (IDENTIFIER_TYPENAME_P (name)
9347 && ! DECL_TEMPLATE_INFO (decl)
9349 /* Warn only declaring the function; there is no need to
9350 warn again about out-of-class definitions. */
9351 && class_type == current_class_type)
9353 tree t = TREE_TYPE (name);
9354 int ref = (TREE_CODE (t) == REFERENCE_TYPE);
9355 const char *what = 0;
9358 t = TYPE_MAIN_VARIANT (TREE_TYPE (t));
9360 if (TREE_CODE (t) == VOID_TYPE)
9362 else if (class_type)
9364 if (t == class_type)
9365 what = "the same type";
9366 /* Don't force t to be complete here. */
9367 else if (IS_AGGR_TYPE (t)
9368 && COMPLETE_TYPE_P (t)
9369 && DERIVED_FROM_P (t, class_type))
9370 what = "a base class";
9374 warning (OPT_Wconversion, "conversion to %s%s will never use a type "
9375 "conversion operator",
9376 ref ? "a reference to " : "", what);
9379 if (operator_code == COND_EXPR)
9382 error ("ISO C++ prohibits overloading operator ?:");
9385 else if (ellipsis_p)
9387 error ("%qD must not have variable number of arguments", decl);
9390 else if (ambi_op_p (operator_code))
9393 /* We pick the one-argument operator codes by default, so
9394 we don't have to change anything. */
9396 else if (arity == 2)
9398 /* If we thought this was a unary operator, we now know
9399 it to be a binary operator. */
9400 switch (operator_code)
9403 operator_code = MULT_EXPR;
9407 operator_code = BIT_AND_EXPR;
9410 case UNARY_PLUS_EXPR:
9411 operator_code = PLUS_EXPR;
9415 operator_code = MINUS_EXPR;
9418 case PREINCREMENT_EXPR:
9419 operator_code = POSTINCREMENT_EXPR;
9422 case PREDECREMENT_EXPR:
9423 operator_code = POSTDECREMENT_EXPR;
9430 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
9432 if ((operator_code == POSTINCREMENT_EXPR
9433 || operator_code == POSTDECREMENT_EXPR)
9434 && ! processing_template_decl
9435 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes)), integer_type_node))
9438 error ("postfix %qD must take %<int%> as its argument",
9441 error ("postfix %qD must take %<int%> as its second "
9449 error ("%qD must take either zero or one argument", decl);
9451 error ("%qD must take either one or two arguments", decl);
9455 /* More Effective C++ rule 6. */
9457 && (operator_code == POSTINCREMENT_EXPR
9458 || operator_code == POSTDECREMENT_EXPR
9459 || operator_code == PREINCREMENT_EXPR
9460 || operator_code == PREDECREMENT_EXPR))
9462 tree arg = TREE_VALUE (argtypes);
9463 tree ret = TREE_TYPE (TREE_TYPE (decl));
9464 if (methodp || TREE_CODE (arg) == REFERENCE_TYPE)
9465 arg = TREE_TYPE (arg);
9466 arg = TYPE_MAIN_VARIANT (arg);
9467 if (operator_code == PREINCREMENT_EXPR
9468 || operator_code == PREDECREMENT_EXPR)
9470 if (TREE_CODE (ret) != REFERENCE_TYPE
9471 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret)),
9473 warning (OPT_Weffc__, "prefix %qD should return %qT", decl,
9474 build_reference_type (arg));
9478 if (!same_type_p (TYPE_MAIN_VARIANT (ret), arg))
9479 warning (OPT_Weffc__, "postfix %qD should return %qT", decl, arg);
9483 else if (unary_op_p (operator_code))
9488 error ("%qD must take %<void%>", decl);
9490 error ("%qD must take exactly one argument", decl);
9494 else /* if (binary_op_p (operator_code)) */
9499 error ("%qD must take exactly one argument", decl);
9501 error ("%qD must take exactly two arguments", decl);
9505 /* More Effective C++ rule 7. */
9507 && (operator_code == TRUTH_ANDIF_EXPR
9508 || operator_code == TRUTH_ORIF_EXPR
9509 || operator_code == COMPOUND_EXPR))
9510 warning (OPT_Weffc__, "user-defined %qD always evaluates both arguments",
9514 /* Effective C++ rule 23. */
9517 && !DECL_ASSIGNMENT_OPERATOR_P (decl)
9518 && (operator_code == PLUS_EXPR
9519 || operator_code == MINUS_EXPR
9520 || operator_code == TRUNC_DIV_EXPR
9521 || operator_code == MULT_EXPR
9522 || operator_code == TRUNC_MOD_EXPR)
9523 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl))) == REFERENCE_TYPE)
9524 warning (OPT_Weffc__, "%qD should return by value", decl);
9527 for (; argtypes && argtypes != void_list_node;
9528 argtypes = TREE_CHAIN (argtypes))
9529 if (TREE_PURPOSE (argtypes))
9531 TREE_PURPOSE (argtypes) = NULL_TREE;
9532 if (operator_code == POSTINCREMENT_EXPR
9533 || operator_code == POSTDECREMENT_EXPR)
9536 pedwarn ("%qD cannot have default arguments", decl);
9540 error ("%qD cannot have default arguments", decl);
9548 /* Return a string giving the keyword associate with CODE. */
9551 tag_name (enum tag_types code)
9570 /* Name lookup in an elaborated-type-specifier (after the keyword
9571 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
9572 elaborated-type-specifier is invalid, issue a diagnostic and return
9573 error_mark_node; otherwise, return the *_TYPE to which it referred.
9574 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
9577 check_elaborated_type_specifier (enum tag_types tag_code,
9579 bool allow_template_p)
9585 struct S { struct S *p; };
9587 name lookup will find the TYPE_DECL for the implicit "S::S"
9588 typedef. Adjust for that here. */
9589 if (DECL_SELF_REFERENCE_P (decl))
9590 decl = TYPE_NAME (TREE_TYPE (decl));
9592 type = TREE_TYPE (decl);
9594 /* Check TEMPLATE_TYPE_PARM first because DECL_IMPLICIT_TYPEDEF_P
9595 is false for this case as well. */
9596 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
9598 error ("using template type parameter %qT after %qs",
9599 type, tag_name (tag_code));
9600 return error_mark_node;
9604 If the identifier resolves to a typedef-name or a template
9605 type-parameter, the elaborated-type-specifier is ill-formed.
9607 In other words, the only legitimate declaration to use in the
9608 elaborated type specifier is the implicit typedef created when
9609 the type is declared. */
9610 else if (!DECL_IMPLICIT_TYPEDEF_P (decl)
9611 && tag_code != typename_type)
9613 error ("using typedef-name %qD after %qs", decl, tag_name (tag_code));
9614 error ("%q+D has a previous declaration here", decl);
9615 return error_mark_node;
9617 else if (TREE_CODE (type) != RECORD_TYPE
9618 && TREE_CODE (type) != UNION_TYPE
9619 && tag_code != enum_type
9620 && tag_code != typename_type)
9622 error ("%qT referred to as %qs", type, tag_name (tag_code));
9623 error ("%q+T has a previous declaration here", type);
9624 return error_mark_node;
9626 else if (TREE_CODE (type) != ENUMERAL_TYPE
9627 && tag_code == enum_type)
9629 error ("%qT referred to as enum", type);
9630 error ("%q+T has a previous declaration here", type);
9631 return error_mark_node;
9633 else if (!allow_template_p
9634 && TREE_CODE (type) == RECORD_TYPE
9635 && CLASSTYPE_IS_TEMPLATE (type))
9637 /* If a class template appears as elaborated type specifier
9638 without a template header such as:
9640 template <class T> class C {};
9641 void f(class C); // No template header here
9643 then the required template argument is missing. */
9644 error ("template argument required for %<%s %T%>",
9645 tag_name (tag_code),
9646 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type)));
9647 return error_mark_node;
9653 /* Lookup NAME in elaborate type specifier in scope according to
9654 SCOPE and issue diagnostics if necessary.
9655 Return *_TYPE node upon success, NULL_TREE when the NAME is not
9656 found, and ERROR_MARK_NODE for type error. */
9659 lookup_and_check_tag (enum tag_types tag_code, tree name,
9660 tag_scope scope, bool template_header_p)
9664 if (scope == ts_global)
9666 /* First try ordinary name lookup, ignoring hidden class name
9667 injected via friend declaration. */
9668 decl = lookup_name_prefer_type (name, 2);
9669 /* If that fails, the name will be placed in the smallest
9670 non-class, non-function-prototype scope according to 3.3.1/5.
9671 We may already have a hidden name declared as friend in this
9672 scope. So lookup again but not ignoring hidden names.
9673 If we find one, that name will be made visible rather than
9674 creating a new tag. */
9676 decl = lookup_type_scope (name, ts_within_enclosing_non_class);
9679 decl = lookup_type_scope (name, scope);
9681 if (decl && DECL_CLASS_TEMPLATE_P (decl))
9682 decl = DECL_TEMPLATE_RESULT (decl);
9684 if (decl && TREE_CODE (decl) == TYPE_DECL)
9686 /* Look for invalid nested type:
9690 if (scope == ts_current && DECL_SELF_REFERENCE_P (decl))
9692 error ("%qD has the same name as the class in which it is "
9695 return error_mark_node;
9698 /* Two cases we need to consider when deciding if a class
9699 template is allowed as an elaborated type specifier:
9700 1. It is a self reference to its own class.
9701 2. It comes with a template header.
9705 template <class T> class C {
9706 class C *c1; // DECL_SELF_REFERENCE_P is true
9709 template <class U> class C; // template_header_p is true
9710 template <class T> class C<T>::D {
9711 class C *c2; // DECL_SELF_REFERENCE_P is true
9714 t = check_elaborated_type_specifier (tag_code,
9717 | DECL_SELF_REFERENCE_P (decl));
9724 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
9725 Define the tag as a forward-reference if it is not defined.
9727 If a declaration is given, process it here, and report an error if
9728 multiple declarations are not identical.
9730 SCOPE is TS_CURRENT when this is also a definition. Only look in
9731 the current frame for the name (since C++ allows new names in any
9732 scope.) It is TS_WITHIN_ENCLOSING_NON_CLASS if this is a friend
9733 declaration. Only look beginning from the current scope outward up
9734 till the nearest non-class scope. Otherwise it is TS_GLOBAL.
9736 TEMPLATE_HEADER_P is true when this declaration is preceded by
9737 a set of template parameters. */
9740 xref_tag (enum tag_types tag_code, tree name,
9741 tag_scope scope, bool template_header_p)
9743 enum tree_code code;
9745 tree context = NULL_TREE;
9747 timevar_push (TV_NAME_LOOKUP);
9749 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
9761 code = ENUMERAL_TYPE;
9767 /* In case of anonymous name, xref_tag is only called to
9768 make type node and push name. Name lookup is not required. */
9769 if (ANON_AGGRNAME_P (name))
9772 t = lookup_and_check_tag (tag_code, name,
9773 scope, template_header_p);
9775 if (t == error_mark_node)
9776 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
9778 if (scope != ts_current && t && current_class_type
9779 && template_class_depth (current_class_type)
9780 && template_header_p)
9782 /* Since SCOPE is not TS_CURRENT, we are not looking at a
9783 definition of this tag. Since, in addition, we are currently
9784 processing a (member) template declaration of a template
9785 class, we must be very careful; consider:
9792 { template <class V>
9793 friend struct S1; };
9795 Here, the S2::S1 declaration should not be confused with the
9796 outer declaration. In particular, the inner version should
9797 have a template parameter of level 2, not level 1. This
9798 would be particularly important if the member declaration
9801 template <class V = U> friend struct S1;
9803 say, when we should tsubst into `U' when instantiating
9804 S2. On the other hand, when presented with:
9814 we must find the inner binding eventually. We
9815 accomplish this by making sure that the new type we
9816 create to represent this declaration has the right
9818 context = TYPE_CONTEXT (t);
9824 /* If no such tag is yet defined, create a forward-reference node
9825 and record it as the "definition".
9826 When a real declaration of this type is found,
9827 the forward-reference will be altered into a real type. */
9828 if (code == ENUMERAL_TYPE)
9830 error ("use of enum %q#D without previous declaration", name);
9831 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
9835 t = make_aggr_type (code);
9836 TYPE_CONTEXT (t) = context;
9837 t = pushtag (name, t, scope);
9842 if (template_header_p && IS_AGGR_TYPE (t))
9844 if (!redeclare_class_template (t, current_template_parms))
9845 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
9847 else if (!processing_template_decl
9849 && CLASSTYPE_IS_TEMPLATE (t))
9851 error ("redeclaration of %qT as a non-template", t);
9852 error ("previous declaration %q+D", t);
9853 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
9856 /* Make injected friend class visible. */
9857 if (scope != ts_within_enclosing_non_class
9858 && hidden_name_p (TYPE_NAME (t)))
9860 DECL_ANTICIPATED (TYPE_NAME (t)) = 0;
9861 DECL_FRIEND_P (TYPE_NAME (t)) = 0;
9863 if (TYPE_TEMPLATE_INFO (t))
9865 DECL_ANTICIPATED (TYPE_TI_TEMPLATE (t)) = 0;
9866 DECL_FRIEND_P (TYPE_TI_TEMPLATE (t)) = 0;
9871 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, t);
9875 xref_tag_from_type (tree old, tree id, tag_scope scope)
9877 enum tag_types tag_kind;
9879 if (TREE_CODE (old) == RECORD_TYPE)
9880 tag_kind = (CLASSTYPE_DECLARED_CLASS (old) ? class_type : record_type);
9882 tag_kind = union_type;
9884 if (id == NULL_TREE)
9885 id = TYPE_IDENTIFIER (old);
9887 return xref_tag (tag_kind, id, scope, false);
9890 /* Create the binfo hierarchy for REF with (possibly NULL) base list
9891 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
9892 access_* node, and the TREE_VALUE is the type of the base-class.
9893 Non-NULL TREE_TYPE indicates virtual inheritance.
9895 Returns true if the binfo hierarchy was successfully created,
9896 false if an error was detected. */
9899 xref_basetypes (tree ref, tree base_list)
9902 tree binfo, base_binfo;
9903 unsigned max_vbases = 0; /* Maximum direct & indirect virtual bases. */
9904 unsigned max_bases = 0; /* Maximum direct bases. */
9906 tree default_access;
9907 tree igo_prev; /* Track Inheritance Graph Order. */
9909 if (ref == error_mark_node)
9912 /* The base of a derived class is private by default, all others are
9914 default_access = (TREE_CODE (ref) == RECORD_TYPE
9915 && CLASSTYPE_DECLARED_CLASS (ref)
9916 ? access_private_node : access_public_node);
9918 /* First, make sure that any templates in base-classes are
9919 instantiated. This ensures that if we call ourselves recursively
9920 we do not get confused about which classes are marked and which
9925 tree basetype = TREE_VALUE (*basep);
9927 if (!(processing_template_decl && uses_template_parms (basetype))
9928 && !complete_type_or_else (basetype, NULL))
9929 /* An incomplete type. Remove it from the list. */
9930 *basep = TREE_CHAIN (*basep);
9934 if (TREE_TYPE (*basep))
9936 if (CLASS_TYPE_P (basetype))
9937 max_vbases += VEC_length (tree, CLASSTYPE_VBASECLASSES (basetype));
9938 basep = &TREE_CHAIN (*basep);
9942 TYPE_MARKED_P (ref) = 1;
9944 /* The binfo slot should be empty, unless this is an (ill-formed)
9946 gcc_assert (!TYPE_BINFO (ref) || TYPE_SIZE (ref));
9947 gcc_assert (TYPE_MAIN_VARIANT (ref) == ref);
9949 binfo = make_tree_binfo (max_bases);
9951 TYPE_BINFO (ref) = binfo;
9952 BINFO_OFFSET (binfo) = size_zero_node;
9953 BINFO_TYPE (binfo) = ref;
9957 BINFO_BASE_ACCESSES (binfo) = VEC_alloc (tree, gc, max_bases);
9958 /* An aggregate cannot have baseclasses. */
9959 CLASSTYPE_NON_AGGREGATE (ref) = 1;
9961 if (TREE_CODE (ref) == UNION_TYPE)
9963 error ("derived union %qT invalid", ref);
9970 if (TYPE_FOR_JAVA (ref))
9972 error ("Java class %qT cannot have multiple bases", ref);
9979 CLASSTYPE_VBASECLASSES (ref) = VEC_alloc (tree, gc, max_vbases);
9981 if (TYPE_FOR_JAVA (ref))
9983 error ("Java class %qT cannot have virtual bases", ref);
9988 for (igo_prev = binfo; base_list; base_list = TREE_CHAIN (base_list))
9990 tree access = TREE_PURPOSE (base_list);
9991 int via_virtual = TREE_TYPE (base_list) != NULL_TREE;
9992 tree basetype = TREE_VALUE (base_list);
9994 if (access == access_default_node)
9995 access = default_access;
9997 if (PACK_EXPANSION_P (basetype))
9998 basetype = PACK_EXPANSION_PATTERN (basetype);
9999 if (TREE_CODE (basetype) == TYPE_DECL)
10000 basetype = TREE_TYPE (basetype);
10001 if (TREE_CODE (basetype) != RECORD_TYPE
10002 && TREE_CODE (basetype) != TYPENAME_TYPE
10003 && TREE_CODE (basetype) != TEMPLATE_TYPE_PARM
10004 && TREE_CODE (basetype) != BOUND_TEMPLATE_TEMPLATE_PARM)
10006 error ("base type %qT fails to be a struct or class type",
10011 if (TYPE_FOR_JAVA (basetype) && (current_lang_depth () == 0))
10012 TYPE_FOR_JAVA (ref) = 1;
10014 base_binfo = NULL_TREE;
10015 if (CLASS_TYPE_P (basetype) && !dependent_type_p (basetype))
10017 base_binfo = TYPE_BINFO (basetype);
10018 /* The original basetype could have been a typedef'd type. */
10019 basetype = BINFO_TYPE (base_binfo);
10021 /* Inherit flags from the base. */
10022 TYPE_HAS_NEW_OPERATOR (ref)
10023 |= TYPE_HAS_NEW_OPERATOR (basetype);
10024 TYPE_HAS_ARRAY_NEW_OPERATOR (ref)
10025 |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype);
10026 TYPE_GETS_DELETE (ref) |= TYPE_GETS_DELETE (basetype);
10027 TYPE_HAS_CONVERSION (ref) |= TYPE_HAS_CONVERSION (basetype);
10028 CLASSTYPE_DIAMOND_SHAPED_P (ref)
10029 |= CLASSTYPE_DIAMOND_SHAPED_P (basetype);
10030 CLASSTYPE_REPEATED_BASE_P (ref)
10031 |= CLASSTYPE_REPEATED_BASE_P (basetype);
10034 /* We must do this test after we've seen through a typedef
10036 if (TYPE_MARKED_P (basetype))
10038 if (basetype == ref)
10039 error ("recursive type %qT undefined", basetype);
10041 error ("duplicate base type %qT invalid", basetype);
10045 if (PACK_EXPANSION_P (TREE_VALUE (base_list)))
10046 /* Regenerate the pack expansion for the bases. */
10047 basetype = make_pack_expansion (basetype);
10049 TYPE_MARKED_P (basetype) = 1;
10051 base_binfo = copy_binfo (base_binfo, basetype, ref,
10052 &igo_prev, via_virtual);
10053 if (!BINFO_INHERITANCE_CHAIN (base_binfo))
10054 BINFO_INHERITANCE_CHAIN (base_binfo) = binfo;
10056 BINFO_BASE_APPEND (binfo, base_binfo);
10057 BINFO_BASE_ACCESS_APPEND (binfo, access);
10060 if (VEC_space (tree, CLASSTYPE_VBASECLASSES (ref), 1))
10061 /* If we have space in the vbase vector, we must have shared at
10062 least one of them, and are therefore diamond shaped. */
10063 CLASSTYPE_DIAMOND_SHAPED_P (ref) = 1;
10065 /* Unmark all the types. */
10066 for (i = 0; BINFO_BASE_ITERATE (binfo, i, base_binfo); i++)
10067 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
10068 TYPE_MARKED_P (ref) = 0;
10070 /* Now see if we have a repeated base type. */
10071 if (!CLASSTYPE_REPEATED_BASE_P (ref))
10073 for (base_binfo = binfo; base_binfo;
10074 base_binfo = TREE_CHAIN (base_binfo))
10076 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
10078 CLASSTYPE_REPEATED_BASE_P (ref) = 1;
10081 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 1;
10083 for (base_binfo = binfo; base_binfo;
10084 base_binfo = TREE_CHAIN (base_binfo))
10085 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
10086 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
10095 /* Begin compiling the definition of an enumeration type.
10097 Returns the type object, as yet incomplete.
10098 Also records info about it so that build_enumerator
10099 may be used to declare the individual values as they are read. */
10102 start_enum (tree name)
10106 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
10108 /* If this is the real definition for a previous forward reference,
10109 fill in the contents in the same object that used to be the
10110 forward reference. */
10112 enumtype = lookup_and_check_tag (enum_type, name,
10113 /*tag_scope=*/ts_current,
10114 /*template_header_p=*/false);
10116 if (enumtype != NULL_TREE && TREE_CODE (enumtype) == ENUMERAL_TYPE)
10118 error ("multiple definition of %q#T", enumtype);
10119 error ("%Jprevious definition here", TYPE_MAIN_DECL (enumtype));
10120 /* Clear out TYPE_VALUES, and start again. */
10121 TYPE_VALUES (enumtype) = NULL_TREE;
10125 /* In case of error, make a dummy enum to allow parsing to
10127 if (enumtype == error_mark_node)
10128 name = make_anon_name ();
10130 enumtype = make_node (ENUMERAL_TYPE);
10131 enumtype = pushtag (name, enumtype, /*tag_scope=*/ts_current);
10137 /* After processing and defining all the values of an enumeration type,
10138 install their decls in the enumeration type and finish it off.
10139 ENUMTYPE is the type object and VALUES a list of name-value pairs. */
10142 finish_enum (tree enumtype)
10151 bool use_short_enum;
10155 integer_type_kind itk;
10156 tree underlying_type = NULL_TREE;
10158 /* We built up the VALUES in reverse order. */
10159 TYPE_VALUES (enumtype) = nreverse (TYPE_VALUES (enumtype));
10161 /* For an enum defined in a template, just set the type of the values;
10162 all further processing is postponed until the template is
10163 instantiated. We need to set the type so that tsubst of a CONST_DECL
10165 if (processing_template_decl)
10167 for (values = TYPE_VALUES (enumtype);
10169 values = TREE_CHAIN (values))
10170 TREE_TYPE (TREE_VALUE (values)) = enumtype;
10171 if (at_function_scope_p ())
10172 add_stmt (build_min (TAG_DEFN, enumtype));
10176 /* Determine the minimum and maximum values of the enumerators. */
10177 if (TYPE_VALUES (enumtype))
10179 minnode = maxnode = NULL_TREE;
10181 for (values = TYPE_VALUES (enumtype);
10183 values = TREE_CHAIN (values))
10185 decl = TREE_VALUE (values);
10187 /* [dcl.enum]: Following the closing brace of an enum-specifier,
10188 each enumerator has the type of its enumeration. Prior to the
10189 closing brace, the type of each enumerator is the type of its
10190 initializing value. */
10191 TREE_TYPE (decl) = enumtype;
10193 /* Update the minimum and maximum values, if appropriate. */
10194 value = DECL_INITIAL (decl);
10195 if (value == error_mark_node)
10196 value = integer_zero_node;
10197 /* Figure out what the minimum and maximum values of the
10198 enumerators are. */
10200 minnode = maxnode = value;
10201 else if (tree_int_cst_lt (maxnode, value))
10203 else if (tree_int_cst_lt (value, minnode))
10210 If the enumerator-list is empty, the underlying type is as if
10211 the enumeration had a single enumerator with value 0. */
10212 minnode = maxnode = integer_zero_node;
10214 /* Compute the number of bits require to represent all values of the
10215 enumeration. We must do this before the type of MINNODE and
10216 MAXNODE are transformed, since min_precision relies on the
10217 TREE_TYPE of the value it is passed. */
10218 unsignedp = tree_int_cst_sgn (minnode) >= 0;
10219 lowprec = min_precision (minnode, unsignedp);
10220 highprec = min_precision (maxnode, unsignedp);
10221 precision = MAX (lowprec, highprec);
10223 /* Determine the underlying type of the enumeration.
10227 The underlying type of an enumeration is an integral type that
10228 can represent all the enumerator values defined in the
10229 enumeration. It is implementation-defined which integral type is
10230 used as the underlying type for an enumeration except that the
10231 underlying type shall not be larger than int unless the value of
10232 an enumerator cannot fit in an int or unsigned int.
10234 We use "int" or an "unsigned int" as the underlying type, even if
10235 a smaller integral type would work, unless the user has
10236 explicitly requested that we use the smallest possible type. The
10237 user can request that for all enumerations with a command line
10238 flag, or for just one enumeration with an attribute. */
10240 use_short_enum = flag_short_enums
10241 || lookup_attribute ("packed", TYPE_ATTRIBUTES (enumtype));
10243 for (itk = (use_short_enum ? itk_char : itk_int);
10247 underlying_type = integer_types[itk];
10248 if (TYPE_PRECISION (underlying_type) >= precision
10249 && TYPE_UNSIGNED (underlying_type) == unsignedp)
10252 if (itk == itk_none)
10256 IF no integral type can represent all the enumerator values, the
10257 enumeration is ill-formed. */
10258 error ("no integral type can represent all of the enumerator values "
10259 "for %qT", enumtype);
10260 precision = TYPE_PRECISION (long_long_integer_type_node);
10261 underlying_type = integer_types[itk_unsigned_long_long];
10264 /* Compute the minium and maximum values for the type.
10268 For an enumeration where emin is the smallest enumerator and emax
10269 is the largest, the values of the enumeration are the values of the
10270 underlying type in the range bmin to bmax, where bmin and bmax are,
10271 respectively, the smallest and largest values of the smallest bit-
10272 field that can store emin and emax. */
10274 /* The middle-end currently assumes that types with TYPE_PRECISION
10275 narrower than their underlying type are suitably zero or sign
10276 extended to fill their mode. g++ doesn't make these guarantees.
10277 Until the middle-end can represent such paradoxical types, we
10278 set the TYPE_PRECISION to the width of the underlying type. */
10279 TYPE_PRECISION (enumtype) = TYPE_PRECISION (underlying_type);
10281 set_min_and_max_values_for_integral_type (enumtype, precision, unsignedp);
10285 The value of sizeof() applied to an enumeration type, an object
10286 of an enumeration type, or an enumerator, is the value of sizeof()
10287 applied to the underlying type. */
10288 TYPE_SIZE (enumtype) = TYPE_SIZE (underlying_type);
10289 TYPE_SIZE_UNIT (enumtype) = TYPE_SIZE_UNIT (underlying_type);
10290 TYPE_MODE (enumtype) = TYPE_MODE (underlying_type);
10291 TYPE_ALIGN (enumtype) = TYPE_ALIGN (underlying_type);
10292 TYPE_USER_ALIGN (enumtype) = TYPE_USER_ALIGN (underlying_type);
10293 TYPE_UNSIGNED (enumtype) = TYPE_UNSIGNED (underlying_type);
10295 /* Convert each of the enumerators to the type of the underlying
10296 type of the enumeration. */
10297 for (values = TYPE_VALUES (enumtype); values; values = TREE_CHAIN (values))
10299 location_t saved_location;
10301 decl = TREE_VALUE (values);
10302 saved_location = input_location;
10303 input_location = DECL_SOURCE_LOCATION (decl);
10304 value = perform_implicit_conversion (underlying_type,
10305 DECL_INITIAL (decl));
10306 input_location = saved_location;
10308 /* Do not clobber shared ints. */
10309 value = copy_node (value);
10311 TREE_TYPE (value) = enumtype;
10312 DECL_INITIAL (decl) = value;
10313 TREE_VALUE (values) = value;
10316 /* Fix up all variant types of this enum type. */
10317 for (t = TYPE_MAIN_VARIANT (enumtype); t; t = TYPE_NEXT_VARIANT (t))
10319 TYPE_VALUES (t) = TYPE_VALUES (enumtype);
10320 TYPE_MIN_VALUE (t) = TYPE_MIN_VALUE (enumtype);
10321 TYPE_MAX_VALUE (t) = TYPE_MAX_VALUE (enumtype);
10322 TYPE_SIZE (t) = TYPE_SIZE (enumtype);
10323 TYPE_SIZE_UNIT (t) = TYPE_SIZE_UNIT (enumtype);
10324 TYPE_MODE (t) = TYPE_MODE (enumtype);
10325 TYPE_PRECISION (t) = TYPE_PRECISION (enumtype);
10326 TYPE_ALIGN (t) = TYPE_ALIGN (enumtype);
10327 TYPE_USER_ALIGN (t) = TYPE_USER_ALIGN (enumtype);
10328 TYPE_UNSIGNED (t) = TYPE_UNSIGNED (enumtype);
10331 /* Finish debugging output for this type. */
10332 rest_of_type_compilation (enumtype, namespace_bindings_p ());
10335 /* Build and install a CONST_DECL for an enumeration constant of the
10336 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
10337 Assignment of sequential values by default is handled here. */
10340 build_enumerator (tree name, tree value, tree enumtype)
10346 /* If the VALUE was erroneous, pretend it wasn't there; that will
10347 result in the enum being assigned the next value in sequence. */
10348 if (value == error_mark_node)
10351 /* Remove no-op casts from the value. */
10353 STRIP_TYPE_NOPS (value);
10355 if (! processing_template_decl)
10357 /* Validate and default VALUE. */
10358 if (value != NULL_TREE)
10360 value = integral_constant_value (value);
10362 if (TREE_CODE (value) == INTEGER_CST)
10364 value = perform_integral_promotions (value);
10365 constant_expression_warning (value);
10369 error ("enumerator value for %qD is not an integer constant", name);
10374 /* Default based on previous value. */
10375 if (value == NULL_TREE)
10377 if (TYPE_VALUES (enumtype))
10380 unsigned HOST_WIDE_INT lo;
10384 /* The next value is the previous value plus one. We can
10385 safely assume that the previous value is an INTEGER_CST.
10386 add_double doesn't know the type of the target expression,
10387 so we must check with int_fits_type_p as well. */
10388 prev_value = DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype)));
10389 overflowed = add_double (TREE_INT_CST_LOW (prev_value),
10390 TREE_INT_CST_HIGH (prev_value),
10392 value = build_int_cst_wide (TREE_TYPE (prev_value), lo, hi);
10393 overflowed |= !int_fits_type_p (value, TREE_TYPE (prev_value));
10397 error ("overflow in enumeration values at %qD", name);
10398 value = error_mark_node;
10402 value = integer_zero_node;
10405 /* Remove no-op casts from the value. */
10406 STRIP_TYPE_NOPS (value);
10409 /* C++ associates enums with global, function, or class declarations. */
10410 context = current_scope ();
10412 /* Build the actual enumeration constant. Note that the enumeration
10413 constants have the type of their initializers until the
10414 enumeration is complete:
10418 Following the closing brace of an enum-specifier, each enumer-
10419 ator has the type of its enumeration. Prior to the closing
10420 brace, the type of each enumerator is the type of its
10421 initializing value.
10423 In finish_enum we will reset the type. Of course, if we're
10424 processing a template, there may be no value. */
10425 type = value ? TREE_TYPE (value) : NULL_TREE;
10427 if (context && context == current_class_type)
10428 /* This enum declaration is local to the class. We need the full
10429 lang_decl so that we can record DECL_CLASS_CONTEXT, for example. */
10430 decl = build_lang_decl (CONST_DECL, name, type);
10432 /* It's a global enum, or it's local to a function. (Note local to
10433 a function could mean local to a class method. */
10434 decl = build_decl (CONST_DECL, name, type);
10436 DECL_CONTEXT (decl) = FROB_CONTEXT (context);
10437 TREE_CONSTANT (decl) = 1;
10438 TREE_INVARIANT (decl) = 1;
10439 TREE_READONLY (decl) = 1;
10440 DECL_INITIAL (decl) = value;
10442 if (context && context == current_class_type)
10443 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
10444 on the TYPE_FIELDS list for `S'. (That's so that you can say
10445 things like `S::i' later.) */
10446 finish_member_declaration (decl);
10450 /* Add this enumeration constant to the list for this type. */
10451 TYPE_VALUES (enumtype) = tree_cons (name, decl, TYPE_VALUES (enumtype));
10455 /* We're defining DECL. Make sure that it's type is OK. */
10458 check_function_type (tree decl, tree current_function_parms)
10460 tree fntype = TREE_TYPE (decl);
10461 tree return_type = complete_type (TREE_TYPE (fntype));
10463 /* In a function definition, arg types must be complete. */
10464 require_complete_types_for_parms (current_function_parms);
10466 if (dependent_type_p (return_type))
10468 if (!COMPLETE_OR_VOID_TYPE_P (return_type))
10470 tree args = TYPE_ARG_TYPES (fntype);
10472 error ("return type %q#T is incomplete", return_type);
10474 /* Make it return void instead. */
10475 if (TREE_CODE (fntype) == METHOD_TYPE)
10476 fntype = build_method_type_directly (TREE_TYPE (TREE_VALUE (args)),
10478 TREE_CHAIN (args));
10480 fntype = build_function_type (void_type_node, args);
10482 = build_exception_variant (fntype,
10483 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (decl)));
10486 abstract_virtuals_error (decl, TREE_TYPE (fntype));
10489 /* Create the FUNCTION_DECL for a function definition.
10490 DECLSPECS and DECLARATOR are the parts of the declaration;
10491 they describe the function's name and the type it returns,
10492 but twisted together in a fashion that parallels the syntax of C.
10494 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
10495 DECLARATOR is really the DECL for the function we are about to
10496 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
10497 indicating that the function is an inline defined in-class.
10499 This function creates a binding context for the function body
10500 as well as setting up the FUNCTION_DECL in current_function_decl.
10502 For C++, we must first check whether that datum makes any sense.
10503 For example, "class A local_a(1,2);" means that variable local_a
10504 is an aggregate of type A, which should have a constructor
10505 applied to it with the argument list [1, 2].
10507 On entry, DECL_INITIAL (decl1) should be NULL_TREE or error_mark_node,
10508 or may be a BLOCK if the function has been defined previously
10509 in this translation unit. On exit, DECL_INITIAL (decl1) will be
10510 error_mark_node if the function has never been defined, or
10511 a BLOCK if the function has been defined somewhere. */
10514 start_preparsed_function (tree decl1, tree attrs, int flags)
10516 tree ctype = NULL_TREE;
10519 int doing_friend = 0;
10520 struct cp_binding_level *bl;
10521 tree current_function_parms;
10522 struct c_fileinfo *finfo
10523 = get_fileinfo (LOCATION_FILE (DECL_SOURCE_LOCATION (decl1)));
10524 bool honor_interface;
10526 /* Sanity check. */
10527 gcc_assert (TREE_CODE (TREE_VALUE (void_list_node)) == VOID_TYPE);
10528 gcc_assert (TREE_CHAIN (void_list_node) == NULL_TREE);
10530 fntype = TREE_TYPE (decl1);
10531 if (TREE_CODE (fntype) == METHOD_TYPE)
10532 ctype = TYPE_METHOD_BASETYPE (fntype);
10534 /* ISO C++ 11.4/5. A friend function defined in a class is in
10535 the (lexical) scope of the class in which it is defined. */
10536 if (!ctype && DECL_FRIEND_P (decl1))
10538 ctype = DECL_FRIEND_CONTEXT (decl1);
10540 /* CTYPE could be null here if we're dealing with a template;
10541 for example, `inline friend float foo()' inside a template
10542 will have no CTYPE set. */
10543 if (ctype && TREE_CODE (ctype) != RECORD_TYPE)
10549 if (DECL_DECLARED_INLINE_P (decl1)
10550 && lookup_attribute ("noinline", attrs))
10551 warning (0, "inline function %q+D given attribute noinline", decl1);
10553 if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1))
10554 /* This is a constructor, we must ensure that any default args
10555 introduced by this definition are propagated to the clones
10556 now. The clones are used directly in overload resolution. */
10557 adjust_clone_args (decl1);
10559 /* Sometimes we don't notice that a function is a static member, and
10560 build a METHOD_TYPE for it. Fix that up now. */
10561 if (ctype != NULL_TREE && DECL_STATIC_FUNCTION_P (decl1)
10562 && TREE_CODE (TREE_TYPE (decl1)) == METHOD_TYPE)
10564 revert_static_member_fn (decl1);
10568 /* Set up current_class_type, and enter the scope of the class, if
10571 push_nested_class (ctype);
10572 else if (DECL_STATIC_FUNCTION_P (decl1))
10573 push_nested_class (DECL_CONTEXT (decl1));
10575 /* Now that we have entered the scope of the class, we must restore
10576 the bindings for any template parameters surrounding DECL1, if it
10577 is an inline member template. (Order is important; consider the
10578 case where a template parameter has the same name as a field of
10579 the class.) It is not until after this point that
10580 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
10581 if (flags & SF_INCLASS_INLINE)
10582 maybe_begin_member_template_processing (decl1);
10584 /* Effective C++ rule 15. */
10586 && DECL_OVERLOADED_OPERATOR_P (decl1) == NOP_EXPR
10587 && TREE_CODE (TREE_TYPE (fntype)) == VOID_TYPE)
10588 warning (OPT_Weffc__, "%<operator=%> should return a reference to %<*this%>");
10590 /* Make the init_value nonzero so pushdecl knows this is not tentative.
10591 error_mark_node is replaced below (in poplevel) with the BLOCK. */
10592 if (!DECL_INITIAL (decl1))
10593 DECL_INITIAL (decl1) = error_mark_node;
10595 /* This function exists in static storage.
10596 (This does not mean `static' in the C sense!) */
10597 TREE_STATIC (decl1) = 1;
10599 /* We must call push_template_decl after current_class_type is set
10600 up. (If we are processing inline definitions after exiting a
10601 class scope, current_class_type will be NULL_TREE until set above
10602 by push_nested_class.) */
10603 if (processing_template_decl)
10605 /* FIXME: Handle error_mark_node more gracefully. */
10606 tree newdecl1 = push_template_decl (decl1);
10607 if (newdecl1 != error_mark_node)
10611 /* We are now in the scope of the function being defined. */
10612 current_function_decl = decl1;
10614 /* Save the parm names or decls from this function's declarator
10615 where store_parm_decls will find them. */
10616 current_function_parms = DECL_ARGUMENTS (decl1);
10618 /* Make sure the parameter and return types are reasonable. When
10619 you declare a function, these types can be incomplete, but they
10620 must be complete when you define the function. */
10621 check_function_type (decl1, current_function_parms);
10623 /* Build the return declaration for the function. */
10624 restype = TREE_TYPE (fntype);
10625 /* Promote the value to int before returning it. */
10626 if (c_promoting_integer_type_p (restype))
10627 restype = type_promotes_to (restype);
10628 if (DECL_RESULT (decl1) == NULL_TREE)
10632 resdecl = build_decl (RESULT_DECL, 0, TYPE_MAIN_VARIANT (restype));
10633 DECL_ARTIFICIAL (resdecl) = 1;
10634 DECL_IGNORED_P (resdecl) = 1;
10635 DECL_RESULT (decl1) = resdecl;
10637 cp_apply_type_quals_to_decl (cp_type_quals (restype), resdecl);
10640 /* Let the user know we're compiling this function. */
10641 announce_function (decl1);
10643 /* Record the decl so that the function name is defined.
10644 If we already have a decl for this name, and it is a FUNCTION_DECL,
10645 use the old decl. */
10646 if (!processing_template_decl && !(flags & SF_PRE_PARSED))
10648 /* A specialization is not used to guide overload resolution. */
10649 if (!DECL_FUNCTION_MEMBER_P (decl1)
10650 && !(DECL_USE_TEMPLATE (decl1) &&
10651 PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl1))))
10653 tree olddecl = pushdecl (decl1);
10655 if (olddecl == error_mark_node)
10656 /* If something went wrong when registering the declaration,
10657 use DECL1; we have to have a FUNCTION_DECL to use when
10658 parsing the body of the function. */
10662 /* Otherwise, OLDDECL is either a previous declaration
10663 of the same function or DECL1 itself. */
10665 if (warn_missing_declarations
10666 && olddecl == decl1
10667 && !DECL_MAIN_P (decl1)
10668 && TREE_PUBLIC (decl1)
10669 && !DECL_DECLARED_INLINE_P (decl1))
10673 /* Check whether DECL1 is in an anonymous
10675 for (context = DECL_CONTEXT (decl1);
10677 context = DECL_CONTEXT (context))
10679 if (TREE_CODE (context) == NAMESPACE_DECL
10680 && DECL_NAME (context) == NULL_TREE)
10684 if (context == NULL)
10685 warning (OPT_Wmissing_declarations,
10686 "no previous declaration for %q+D", decl1);
10694 /* We need to set the DECL_CONTEXT. */
10695 if (!DECL_CONTEXT (decl1) && DECL_TEMPLATE_INFO (decl1))
10696 DECL_CONTEXT (decl1) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1));
10698 fntype = TREE_TYPE (decl1);
10700 /* If #pragma weak applies, mark the decl appropriately now.
10701 The pragma only applies to global functions. Because
10702 determining whether or not the #pragma applies involves
10703 computing the mangled name for the declaration, we cannot
10704 apply the pragma until after we have merged this declaration
10705 with any previous declarations; if the original declaration
10706 has a linkage specification, that specification applies to
10707 the definition as well, and may affect the mangled name. */
10708 if (!DECL_CONTEXT (decl1))
10709 maybe_apply_pragma_weak (decl1);
10712 /* Reset this in case the call to pushdecl changed it. */
10713 current_function_decl = decl1;
10715 gcc_assert (DECL_INITIAL (decl1));
10717 /* This function may already have been parsed, in which case just
10718 return; our caller will skip over the body without parsing. */
10719 if (DECL_INITIAL (decl1) != error_mark_node)
10722 /* Initialize RTL machinery. We cannot do this until
10723 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
10724 even when processing a template; this is how we get
10725 CFUN set up, and our per-function variables initialized.
10726 FIXME factor out the non-RTL stuff. */
10727 bl = current_binding_level;
10728 allocate_struct_function (decl1);
10729 current_binding_level = bl;
10731 /* Even though we're inside a function body, we still don't want to
10732 call expand_expr to calculate the size of a variable-sized array.
10733 We haven't necessarily assigned RTL to all variables yet, so it's
10734 not safe to try to expand expressions involving them. */
10735 cfun->x_dont_save_pending_sizes_p = 1;
10737 /* Start the statement-tree, start the tree now. */
10738 DECL_SAVED_TREE (decl1) = push_stmt_list ();
10740 /* If we are (erroneously) defining a function that we have already
10741 defined before, wipe out what we knew before. */
10742 if (!DECL_PENDING_INLINE_P (decl1))
10743 DECL_SAVED_FUNCTION_DATA (decl1) = NULL;
10745 if (ctype && !doing_friend && !DECL_STATIC_FUNCTION_P (decl1))
10747 /* We know that this was set up by `grokclassfn'. We do not
10748 wait until `store_parm_decls', since evil parse errors may
10749 never get us to that point. Here we keep the consistency
10750 between `current_class_type' and `current_class_ptr'. */
10751 tree t = DECL_ARGUMENTS (decl1);
10753 gcc_assert (t != NULL_TREE && TREE_CODE (t) == PARM_DECL);
10754 gcc_assert (TREE_CODE (TREE_TYPE (t)) == POINTER_TYPE);
10756 cp_function_chain->x_current_class_ref
10757 = build_indirect_ref (t, NULL);
10758 cp_function_chain->x_current_class_ptr = t;
10760 /* Constructors and destructors need to know whether they're "in
10761 charge" of initializing virtual base classes. */
10762 t = TREE_CHAIN (t);
10763 if (DECL_HAS_IN_CHARGE_PARM_P (decl1))
10765 current_in_charge_parm = t;
10766 t = TREE_CHAIN (t);
10768 if (DECL_HAS_VTT_PARM_P (decl1))
10770 gcc_assert (DECL_NAME (t) == vtt_parm_identifier);
10771 current_vtt_parm = t;
10775 honor_interface = (!DECL_TEMPLATE_INSTANTIATION (decl1)
10776 /* Implicitly-defined methods (like the
10777 destructor for a class in which no destructor
10778 is explicitly declared) must not be defined
10779 until their definition is needed. So, we
10780 ignore interface specifications for
10781 compiler-generated functions. */
10782 && !DECL_ARTIFICIAL (decl1));
10784 if (DECL_INTERFACE_KNOWN (decl1))
10786 tree ctx = decl_function_context (decl1);
10788 if (DECL_NOT_REALLY_EXTERN (decl1))
10789 DECL_EXTERNAL (decl1) = 0;
10791 if (ctx != NULL_TREE && DECL_DECLARED_INLINE_P (ctx)
10792 && TREE_PUBLIC (ctx))
10793 /* This is a function in a local class in an extern inline
10795 comdat_linkage (decl1);
10797 /* If this function belongs to an interface, it is public.
10798 If it belongs to someone else's interface, it is also external.
10799 This only affects inlines and template instantiations. */
10800 else if (!finfo->interface_unknown && honor_interface)
10802 if (DECL_DECLARED_INLINE_P (decl1)
10803 || DECL_TEMPLATE_INSTANTIATION (decl1)
10804 || processing_template_decl)
10806 DECL_EXTERNAL (decl1)
10807 = (finfo->interface_only
10808 || (DECL_DECLARED_INLINE_P (decl1)
10809 && ! flag_implement_inlines
10810 && !DECL_VINDEX (decl1)));
10812 /* For WIN32 we also want to put these in linkonce sections. */
10813 maybe_make_one_only (decl1);
10816 DECL_EXTERNAL (decl1) = 0;
10817 DECL_INTERFACE_KNOWN (decl1) = 1;
10818 /* If this function is in an interface implemented in this file,
10819 make sure that the back end knows to emit this function
10821 if (!DECL_EXTERNAL (decl1))
10822 mark_needed (decl1);
10824 else if (finfo->interface_unknown && finfo->interface_only
10825 && honor_interface)
10827 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
10828 interface, we will have both finfo->interface_unknown and
10829 finfo->interface_only set. In that case, we don't want to
10830 use the normal heuristics because someone will supply a
10831 #pragma implementation elsewhere, and deducing it here would
10832 produce a conflict. */
10833 comdat_linkage (decl1);
10834 DECL_EXTERNAL (decl1) = 0;
10835 DECL_INTERFACE_KNOWN (decl1) = 1;
10836 DECL_DEFER_OUTPUT (decl1) = 1;
10840 /* This is a definition, not a reference.
10841 So clear DECL_EXTERNAL. */
10842 DECL_EXTERNAL (decl1) = 0;
10844 if ((DECL_DECLARED_INLINE_P (decl1)
10845 || DECL_TEMPLATE_INSTANTIATION (decl1))
10846 && ! DECL_INTERFACE_KNOWN (decl1)
10847 /* Don't try to defer nested functions for now. */
10848 && ! decl_function_context (decl1))
10849 DECL_DEFER_OUTPUT (decl1) = 1;
10851 DECL_INTERFACE_KNOWN (decl1) = 1;
10854 /* Determine the ELF visibility attribute for the function. We must not
10855 do this before calling "pushdecl", as we must allow "duplicate_decls"
10856 to merge any attributes appropriately. We also need to wait until
10858 if (!DECL_CLONED_FUNCTION_P (decl1))
10859 determine_visibility (decl1);
10861 begin_scope (sk_function_parms, decl1);
10865 if (DECL_DESTRUCTOR_P (decl1)
10866 || (DECL_CONSTRUCTOR_P (decl1)
10867 && targetm.cxx.cdtor_returns_this ()))
10869 cdtor_label = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
10870 DECL_CONTEXT (cdtor_label) = current_function_decl;
10873 start_fname_decls ();
10875 store_parm_decls (current_function_parms);
10879 /* Like start_preparsed_function, except that instead of a
10880 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
10882 Returns 1 on success. If the DECLARATOR is not suitable for a function
10883 (it defines a datum instead), we return 0, which tells
10884 yyparse to report a parse error. */
10887 start_function (cp_decl_specifier_seq *declspecs,
10888 const cp_declarator *declarator,
10893 decl1 = grokdeclarator (declarator, declspecs, FUNCDEF, 1, &attrs);
10894 /* If the declarator is not suitable for a function definition,
10895 cause a syntax error. */
10896 if (decl1 == NULL_TREE || TREE_CODE (decl1) != FUNCTION_DECL)
10899 if (DECL_MAIN_P (decl1))
10900 /* main must return int. grokfndecl should have corrected it
10901 (and issued a diagnostic) if the user got it wrong. */
10902 gcc_assert (same_type_p (TREE_TYPE (TREE_TYPE (decl1)),
10903 integer_type_node));
10905 start_preparsed_function (decl1, attrs, /*flags=*/SF_DEFAULT);
10910 /* Returns true iff an EH_SPEC_BLOCK should be created in the body of
10914 use_eh_spec_block (tree fn)
10916 return (flag_exceptions && flag_enforce_eh_specs
10917 && !processing_template_decl
10918 && TYPE_RAISES_EXCEPTIONS (TREE_TYPE (fn))
10919 /* We insert the EH_SPEC_BLOCK only in the original
10920 function; then, it is copied automatically to the
10922 && !DECL_CLONED_FUNCTION_P (fn)
10923 /* Implicitly-generated constructors and destructors have
10924 exception specifications. However, those specifications
10925 are the union of the possible exceptions specified by the
10926 constructors/destructors for bases and members, so no
10927 unallowed exception will ever reach this function. By
10928 not creating the EH_SPEC_BLOCK we save a little memory,
10929 and we avoid spurious warnings about unreachable
10931 && !DECL_ARTIFICIAL (fn));
10934 /* Store the parameter declarations into the current function declaration.
10935 This is called after parsing the parameter declarations, before
10936 digesting the body of the function.
10938 Also install to binding contour return value identifier, if any. */
10941 store_parm_decls (tree current_function_parms)
10943 tree fndecl = current_function_decl;
10946 /* This is a chain of any other decls that came in among the parm
10947 declarations. If a parm is declared with enum {foo, bar} x;
10948 then CONST_DECLs for foo and bar are put here. */
10949 tree nonparms = NULL_TREE;
10951 if (current_function_parms)
10953 /* This case is when the function was defined with an ANSI prototype.
10954 The parms already have decls, so we need not do anything here
10955 except record them as in effect
10956 and complain if any redundant old-style parm decls were written. */
10958 tree specparms = current_function_parms;
10961 /* Must clear this because it might contain TYPE_DECLs declared
10963 current_binding_level->names = NULL;
10965 /* If we're doing semantic analysis, then we'll call pushdecl
10966 for each of these. We must do them in reverse order so that
10967 they end in the correct forward order. */
10968 specparms = nreverse (specparms);
10970 for (parm = specparms; parm; parm = next)
10972 next = TREE_CHAIN (parm);
10973 if (TREE_CODE (parm) == PARM_DECL)
10975 if (DECL_NAME (parm) == NULL_TREE
10976 || TREE_CODE (parm) != VOID_TYPE)
10979 error ("parameter %qD declared void", parm);
10983 /* If we find an enum constant or a type tag,
10984 put it aside for the moment. */
10985 TREE_CHAIN (parm) = NULL_TREE;
10986 nonparms = chainon (nonparms, parm);
10990 /* Get the decls in their original chain order and record in the
10991 function. This is all and only the PARM_DECLs that were
10992 pushed into scope by the loop above. */
10993 DECL_ARGUMENTS (fndecl) = getdecls ();
10996 DECL_ARGUMENTS (fndecl) = NULL_TREE;
10998 /* Now store the final chain of decls for the arguments
10999 as the decl-chain of the current lexical scope.
11000 Put the enumerators in as well, at the front so that
11001 DECL_ARGUMENTS is not modified. */
11002 current_binding_level->names = chainon (nonparms, DECL_ARGUMENTS (fndecl));
11004 if (use_eh_spec_block (current_function_decl))
11005 current_eh_spec_block = begin_eh_spec_block ();
11009 /* We have finished doing semantic analysis on DECL, but have not yet
11010 generated RTL for its body. Save away our current state, so that
11011 when we want to generate RTL later we know what to do. */
11014 save_function_data (tree decl)
11016 struct language_function *f;
11018 /* Save the language-specific per-function data so that we can
11019 get it back when we really expand this function. */
11020 gcc_assert (!DECL_PENDING_INLINE_P (decl));
11023 f = GGC_NEW (struct language_function);
11024 memcpy (f, cp_function_chain, sizeof (struct language_function));
11025 DECL_SAVED_FUNCTION_DATA (decl) = f;
11027 /* Clear out the bits we don't need. */
11028 f->base.x_stmt_tree.x_cur_stmt_list = NULL_TREE;
11029 f->bindings = NULL;
11030 f->x_local_names = NULL;
11034 /* Set the return value of the constructor (if present). */
11037 finish_constructor_body (void)
11042 if (targetm.cxx.cdtor_returns_this ())
11044 /* Any return from a constructor will end up here. */
11045 add_stmt (build_stmt (LABEL_EXPR, cdtor_label));
11047 val = DECL_ARGUMENTS (current_function_decl);
11048 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
11049 DECL_RESULT (current_function_decl), val);
11050 /* Return the address of the object. */
11051 exprstmt = build_stmt (RETURN_EXPR, val);
11052 add_stmt (exprstmt);
11056 /* Do all the processing for the beginning of a destructor; set up the
11057 vtable pointers and cleanups for bases and members. */
11060 begin_destructor_body (void)
11062 tree compound_stmt;
11064 /* If the CURRENT_CLASS_TYPE is incomplete, we will have already
11065 issued an error message. We still want to try to process the
11066 body of the function, but initialize_vtbl_ptrs will crash if
11067 TYPE_BINFO is NULL. */
11068 if (COMPLETE_TYPE_P (current_class_type))
11070 compound_stmt = begin_compound_stmt (0);
11071 /* Make all virtual function table pointers in non-virtual base
11072 classes point to CURRENT_CLASS_TYPE's virtual function
11074 initialize_vtbl_ptrs (current_class_ptr);
11075 finish_compound_stmt (compound_stmt);
11077 /* And insert cleanups for our bases and members so that they
11078 will be properly destroyed if we throw. */
11079 push_base_cleanups ();
11083 /* At the end of every destructor we generate code to delete the object if
11084 necessary. Do that now. */
11087 finish_destructor_body (void)
11091 /* Any return from a destructor will end up here; that way all base
11092 and member cleanups will be run when the function returns. */
11093 add_stmt (build_stmt (LABEL_EXPR, cdtor_label));
11095 /* In a virtual destructor, we must call delete. */
11096 if (DECL_VIRTUAL_P (current_function_decl))
11099 tree virtual_size = cxx_sizeof (current_class_type);
11103 At the point of definition of a virtual destructor (including
11104 an implicit definition), non-placement operator delete shall
11105 be looked up in the scope of the destructor's class and if
11106 found shall be accessible and unambiguous. */
11107 exprstmt = build_op_delete_call(DELETE_EXPR, current_class_ptr,
11109 /*global_p=*/false,
11110 /*placement=*/NULL_TREE,
11111 /*alloc_fn=*/NULL_TREE);
11113 if_stmt = begin_if_stmt ();
11114 finish_if_stmt_cond (build2 (BIT_AND_EXPR, integer_type_node,
11115 current_in_charge_parm,
11118 finish_expr_stmt (exprstmt);
11119 finish_then_clause (if_stmt);
11120 finish_if_stmt (if_stmt);
11123 if (targetm.cxx.cdtor_returns_this ())
11127 val = DECL_ARGUMENTS (current_function_decl);
11128 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
11129 DECL_RESULT (current_function_decl), val);
11130 /* Return the address of the object. */
11131 exprstmt = build_stmt (RETURN_EXPR, val);
11132 add_stmt (exprstmt);
11136 /* Do the necessary processing for the beginning of a function body, which
11137 in this case includes member-initializers, but not the catch clauses of
11138 a function-try-block. Currently, this means opening a binding level
11139 for the member-initializers (in a ctor) and member cleanups (in a dtor). */
11142 begin_function_body (void)
11146 if (! FUNCTION_NEEDS_BODY_BLOCK (current_function_decl))
11149 if (processing_template_decl)
11150 /* Do nothing now. */;
11152 /* Always keep the BLOCK node associated with the outermost pair of
11153 curly braces of a function. These are needed for correct
11154 operation of dwarfout.c. */
11155 keep_next_level (true);
11157 stmt = begin_compound_stmt (BCS_FN_BODY);
11159 if (processing_template_decl)
11160 /* Do nothing now. */;
11161 else if (DECL_DESTRUCTOR_P (current_function_decl))
11162 begin_destructor_body ();
11167 /* Do the processing for the end of a function body. Currently, this means
11168 closing out the cleanups for fully-constructed bases and members, and in
11169 the case of the destructor, deleting the object if desired. Again, this
11170 is only meaningful for [cd]tors, since they are the only functions where
11171 there is a significant distinction between the main body and any
11172 function catch clauses. Handling, say, main() return semantics here
11173 would be wrong, as flowing off the end of a function catch clause for
11174 main() would also need to return 0. */
11177 finish_function_body (tree compstmt)
11179 if (compstmt == NULL_TREE)
11182 /* Close the block. */
11183 finish_compound_stmt (compstmt);
11185 if (processing_template_decl)
11186 /* Do nothing now. */;
11187 else if (DECL_CONSTRUCTOR_P (current_function_decl))
11188 finish_constructor_body ();
11189 else if (DECL_DESTRUCTOR_P (current_function_decl))
11190 finish_destructor_body ();
11193 /* Given a function, returns the BLOCK corresponding to the outermost level
11194 of curly braces, skipping the artificial block created for constructor
11198 outer_curly_brace_block (tree fndecl)
11200 tree block = BLOCK_SUBBLOCKS (DECL_INITIAL (fndecl));
11201 if (FUNCTION_NEEDS_BODY_BLOCK (current_function_decl))
11202 /* Skip the artificial function body block. */
11203 block = BLOCK_SUBBLOCKS (block);
11207 /* Finish up a function declaration and compile that function
11208 all the way to assembler language output. The free the storage
11209 for the function definition.
11211 FLAGS is a bitwise or of the following values:
11213 We just finished processing the body of an in-class inline
11214 function definition. (This processing will have taken place
11215 after the class definition is complete.) */
11218 finish_function (int flags)
11220 tree fndecl = current_function_decl;
11221 tree fntype, ctype = NULL_TREE;
11222 int inclass_inline = (flags & 2) != 0;
11225 /* When we get some parse errors, we can end up without a
11226 current_function_decl, so cope. */
11227 if (fndecl == NULL_TREE)
11228 return error_mark_node;
11230 if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fndecl)
11231 && DECL_VIRTUAL_P (fndecl)
11232 && !processing_template_decl)
11234 tree fnclass = DECL_CONTEXT (fndecl);
11235 if (fndecl == CLASSTYPE_KEY_METHOD (fnclass))
11236 keyed_classes = tree_cons (NULL_TREE, fnclass, keyed_classes);
11239 nested = function_depth > 1;
11240 fntype = TREE_TYPE (fndecl);
11242 /* TREE_READONLY (fndecl) = 1;
11243 This caused &foo to be of type ptr-to-const-function
11244 which then got a warning when stored in a ptr-to-function variable. */
11246 gcc_assert (building_stmt_tree ());
11247 /* The current function is being defined, so its DECL_INITIAL should
11248 be set, and unless there's a multiple definition, it should be
11249 error_mark_node. */
11250 gcc_assert (DECL_INITIAL (fndecl) == error_mark_node);
11252 /* For a cloned function, we've already got all the code we need;
11253 there's no need to add any extra bits. */
11254 if (!DECL_CLONED_FUNCTION_P (fndecl))
11256 if (DECL_MAIN_P (current_function_decl))
11260 /* Make it so that `main' always returns 0 by default (or
11263 stmt = finish_return_stmt (integer_one_node);
11265 stmt = finish_return_stmt (integer_zero_node);
11267 /* Hack. We don't want the middle-end to warn that this
11268 return is unreachable, so put the statement on the
11270 #ifdef USE_MAPPED_LOCATION
11271 SET_EXPR_LOCATION (stmt, UNKNOWN_LOCATION);
11273 annotate_with_file_line (stmt, input_filename, 0);
11277 if (use_eh_spec_block (current_function_decl))
11278 finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
11279 (TREE_TYPE (current_function_decl)),
11280 current_eh_spec_block);
11283 /* If we're saving up tree structure, tie off the function now. */
11284 DECL_SAVED_TREE (fndecl) = pop_stmt_list (DECL_SAVED_TREE (fndecl));
11286 finish_fname_decls ();
11288 /* If this function can't throw any exceptions, remember that. */
11289 if (!processing_template_decl
11290 && !cp_function_chain->can_throw
11291 && !flag_non_call_exceptions
11292 && !DECL_REPLACEABLE_P (fndecl))
11293 TREE_NOTHROW (fndecl) = 1;
11295 /* This must come after expand_function_end because cleanups might
11296 have declarations (from inline functions) that need to go into
11297 this function's blocks. */
11299 /* If the current binding level isn't the outermost binding level
11300 for this function, either there is a bug, or we have experienced
11301 syntax errors and the statement tree is malformed. */
11302 if (current_binding_level->kind != sk_function_parms)
11304 /* Make sure we have already experienced errors. */
11305 gcc_assert (errorcount);
11307 /* Throw away the broken statement tree and extra binding
11309 DECL_SAVED_TREE (fndecl) = alloc_stmt_list ();
11311 while (current_binding_level->kind != sk_function_parms)
11313 if (current_binding_level->kind == sk_class)
11314 pop_nested_class ();
11316 poplevel (0, 0, 0);
11319 poplevel (1, 0, 1);
11321 /* Statements should always be full-expressions at the outermost set
11322 of curly braces for a function. */
11323 gcc_assert (stmts_are_full_exprs_p ());
11325 /* Set up the named return value optimization, if we can. Candidate
11326 variables are selected in check_return_value. */
11327 if (current_function_return_value)
11329 tree r = current_function_return_value;
11332 if (r != error_mark_node
11333 /* This is only worth doing for fns that return in memory--and
11334 simpler, since we don't have to worry about promoted modes. */
11335 && aggregate_value_p (TREE_TYPE (TREE_TYPE (fndecl)), fndecl)
11336 /* Only allow this for variables declared in the outer scope of
11337 the function so we know that their lifetime always ends with a
11338 return; see g++.dg/opt/nrv6.C. We could be more flexible if
11339 we were to do this optimization in tree-ssa. */
11340 && (outer = outer_curly_brace_block (fndecl))
11341 && chain_member (r, BLOCK_VARS (outer)))
11342 finalize_nrv (&DECL_SAVED_TREE (fndecl), r, DECL_RESULT (fndecl));
11344 current_function_return_value = NULL_TREE;
11347 /* Remember that we were in class scope. */
11348 if (current_class_name)
11349 ctype = current_class_type;
11351 /* Must mark the RESULT_DECL as being in this function. */
11352 DECL_CONTEXT (DECL_RESULT (fndecl)) = fndecl;
11354 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
11355 to the FUNCTION_DECL node itself. */
11356 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl)) = fndecl;
11358 /* Save away current state, if appropriate. */
11359 if (!processing_template_decl)
11360 save_function_data (fndecl);
11362 /* Complain if there's just no return statement. */
11363 if (warn_return_type
11364 && TREE_CODE (TREE_TYPE (fntype)) != VOID_TYPE
11365 && !dependent_type_p (TREE_TYPE (fntype))
11366 && !current_function_returns_value && !current_function_returns_null
11367 /* Don't complain if we abort or throw. */
11368 && !current_function_returns_abnormally
11369 && !DECL_NAME (DECL_RESULT (fndecl))
11370 /* Normally, with -Wreturn-type, flow will complain. Unless we're an
11371 inline function, as we might never be compiled separately. */
11372 && (DECL_INLINE (fndecl) || processing_template_decl)
11373 /* Structor return values (if any) are set by the compiler. */
11374 && !DECL_CONSTRUCTOR_P (fndecl)
11375 && !DECL_DESTRUCTOR_P (fndecl))
11376 warning (OPT_Wreturn_type, "no return statement in function returning non-void");
11378 /* Store the end of the function, so that we get good line number
11379 info for the epilogue. */
11380 cfun->function_end_locus = input_location;
11382 /* Genericize before inlining. */
11383 if (!processing_template_decl)
11385 struct language_function *f = DECL_SAVED_FUNCTION_DATA (fndecl);
11386 cp_genericize (fndecl);
11387 /* Clear out the bits we don't need. */
11388 f->x_current_class_ptr = NULL;
11389 f->x_current_class_ref = NULL;
11390 f->x_eh_spec_block = NULL;
11391 f->x_in_charge_parm = NULL;
11392 f->x_vtt_parm = NULL;
11393 f->x_return_value = NULL;
11394 f->bindings = NULL;
11395 f->extern_decl_map = NULL;
11397 /* Handle attribute((warn_unused_result)). Relies on gimple input. */
11398 c_warn_unused_result (&DECL_SAVED_TREE (fndecl));
11400 /* Clear out the bits we don't need. */
11401 local_names = NULL;
11403 /* We're leaving the context of this function, so zap cfun. It's still in
11404 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
11406 current_function_decl = NULL;
11408 /* If this is an in-class inline definition, we may have to pop the
11409 bindings for the template parameters that we added in
11410 maybe_begin_member_template_processing when start_function was
11412 if (inclass_inline)
11413 maybe_end_member_template_processing ();
11415 /* Leave the scope of the class. */
11417 pop_nested_class ();
11423 /* Let the error reporting routines know that we're outside a
11424 function. For a nested function, this value is used in
11425 cxx_pop_function_context and then reset via pop_function_context. */
11426 current_function_decl = NULL_TREE;
11431 /* Create the FUNCTION_DECL for a function definition.
11432 DECLSPECS and DECLARATOR are the parts of the declaration;
11433 they describe the return type and the name of the function,
11434 but twisted together in a fashion that parallels the syntax of C.
11436 This function creates a binding context for the function body
11437 as well as setting up the FUNCTION_DECL in current_function_decl.
11439 Returns a FUNCTION_DECL on success.
11441 If the DECLARATOR is not suitable for a function (it defines a datum
11442 instead), we return 0, which tells yyparse to report a parse error.
11444 May return void_type_node indicating that this method is actually
11445 a friend. See grokfield for more details.
11447 Came here with a `.pushlevel' .
11449 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
11450 CHANGES TO CODE IN `grokfield'. */
11453 start_method (cp_decl_specifier_seq *declspecs,
11454 const cp_declarator *declarator, tree attrlist)
11456 tree fndecl = grokdeclarator (declarator, declspecs, MEMFUNCDEF, 0,
11459 if (fndecl == error_mark_node)
11460 return error_mark_node;
11462 if (fndecl == NULL || TREE_CODE (fndecl) != FUNCTION_DECL)
11464 error ("invalid member function declaration");
11465 return error_mark_node;
11469 cplus_decl_attributes (&fndecl, attrlist, 0);
11471 /* Pass friends other than inline friend functions back. */
11472 if (fndecl == void_type_node)
11475 if (DECL_IN_AGGR_P (fndecl))
11477 if (DECL_CONTEXT (fndecl)
11478 && TREE_CODE (DECL_CONTEXT (fndecl)) != NAMESPACE_DECL)
11479 error ("%qD is already defined in class %qT", fndecl,
11480 DECL_CONTEXT (fndecl));
11481 return error_mark_node;
11484 check_template_shadow (fndecl);
11486 DECL_DECLARED_INLINE_P (fndecl) = 1;
11487 if (flag_default_inline)
11488 DECL_INLINE (fndecl) = 1;
11490 /* We process method specializations in finish_struct_1. */
11491 if (processing_template_decl && !DECL_TEMPLATE_SPECIALIZATION (fndecl))
11493 fndecl = push_template_decl (fndecl);
11494 if (fndecl == error_mark_node)
11498 if (! DECL_FRIEND_P (fndecl))
11500 if (TREE_CHAIN (fndecl))
11502 fndecl = copy_node (fndecl);
11503 TREE_CHAIN (fndecl) = NULL_TREE;
11507 finish_decl (fndecl, NULL_TREE, NULL_TREE);
11509 /* Make a place for the parms. */
11510 begin_scope (sk_function_parms, fndecl);
11512 DECL_IN_AGGR_P (fndecl) = 1;
11516 /* Go through the motions of finishing a function definition.
11517 We don't compile this method until after the whole class has
11520 FINISH_METHOD must return something that looks as though it
11521 came from GROKFIELD (since we are defining a method, after all).
11523 This is called after parsing the body of the function definition.
11524 STMTS is the chain of statements that makes up the function body.
11526 DECL is the ..._DECL that `start_method' provided. */
11529 finish_method (tree decl)
11531 tree fndecl = decl;
11536 if (decl == void_type_node)
11539 old_initial = DECL_INITIAL (fndecl);
11541 /* Undo the level for the parms (from start_method).
11542 This is like poplevel, but it causes nothing to be
11543 saved. Saving information here confuses symbol-table
11544 output routines. Besides, this information will
11545 be correctly output when this method is actually
11548 /* Clear out the meanings of the local variables of this level;
11549 also record in each decl which block it belongs to. */
11551 for (link = current_binding_level->names; link; link = TREE_CHAIN (link))
11553 if (DECL_NAME (link) != NULL_TREE)
11554 pop_binding (DECL_NAME (link), link);
11555 gcc_assert (TREE_CODE (link) != FUNCTION_DECL);
11556 DECL_CONTEXT (link) = NULL_TREE;
11559 poplevel (0, 0, 0);
11561 DECL_INITIAL (fndecl) = old_initial;
11563 /* We used to check if the context of FNDECL was different from
11564 current_class_type as another way to get inside here. This didn't work
11565 for String.cc in libg++. */
11566 if (DECL_FRIEND_P (fndecl))
11568 VEC_safe_push (tree, gc, CLASSTYPE_INLINE_FRIENDS (current_class_type),
11570 decl = void_type_node;
11577 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
11578 we can lay it out later, when and if its type becomes complete. */
11581 maybe_register_incomplete_var (tree var)
11583 gcc_assert (TREE_CODE (var) == VAR_DECL);
11585 /* Keep track of variables with incomplete types. */
11586 if (!processing_template_decl && TREE_TYPE (var) != error_mark_node
11587 && DECL_EXTERNAL (var))
11589 tree inner_type = TREE_TYPE (var);
11591 while (TREE_CODE (inner_type) == ARRAY_TYPE)
11592 inner_type = TREE_TYPE (inner_type);
11593 inner_type = TYPE_MAIN_VARIANT (inner_type);
11595 if ((!COMPLETE_TYPE_P (inner_type) && CLASS_TYPE_P (inner_type))
11596 /* RTTI TD entries are created while defining the type_info. */
11597 || (TYPE_LANG_SPECIFIC (inner_type)
11598 && TYPE_BEING_DEFINED (inner_type)))
11599 incomplete_vars = tree_cons (inner_type, var, incomplete_vars);
11603 /* Called when a class type (given by TYPE) is defined. If there are
11604 any existing VAR_DECLs whose type hsa been completed by this
11605 declaration, update them now. */
11608 complete_vars (tree type)
11610 tree *list = &incomplete_vars;
11612 gcc_assert (CLASS_TYPE_P (type));
11615 if (same_type_p (type, TREE_PURPOSE (*list)))
11617 tree var = TREE_VALUE (*list);
11618 tree type = TREE_TYPE (var);
11619 /* Complete the type of the variable. The VAR_DECL itself
11620 will be laid out in expand_expr. */
11621 complete_type (type);
11622 cp_apply_type_quals_to_decl (cp_type_quals (type), var);
11623 /* Remove this entry from the list. */
11624 *list = TREE_CHAIN (*list);
11627 list = &TREE_CHAIN (*list);
11630 /* Check for pending declarations which may have abstract type. */
11631 complete_type_check_abstract (type);
11634 /* If DECL is of a type which needs a cleanup, build that cleanup
11638 cxx_maybe_build_cleanup (tree decl)
11640 tree type = TREE_TYPE (decl);
11642 if (type != error_mark_node && TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
11644 int flags = LOOKUP_NORMAL|LOOKUP_DESTRUCTOR;
11646 bool has_vbases = (TREE_CODE (type) == RECORD_TYPE
11647 && CLASSTYPE_VBASECLASSES (type));
11649 if (TREE_CODE (type) == ARRAY_TYPE)
11653 cxx_mark_addressable (decl);
11654 rval = build_unary_op (ADDR_EXPR, decl, 0);
11657 /* Optimize for space over speed here. */
11658 if (!has_vbases || flag_expensive_optimizations)
11659 flags |= LOOKUP_NONVIRTUAL;
11661 rval = build_delete (TREE_TYPE (rval), rval,
11662 sfk_complete_destructor, flags, 0);
11669 /* When a stmt has been parsed, this function is called. */
11676 /* DECL was originally constructed as a non-static member function,
11677 but turned out to be static. Update it accordingly. */
11680 revert_static_member_fn (tree decl)
11683 tree function = TREE_TYPE (decl);
11684 tree args = TYPE_ARG_TYPES (function);
11686 if (cp_type_quals (TREE_TYPE (TREE_VALUE (args)))
11687 != TYPE_UNQUALIFIED)
11688 error ("static member function %q#D declared with type qualifiers", decl);
11690 args = TREE_CHAIN (args);
11691 tmp = build_function_type (TREE_TYPE (function), args);
11692 tmp = build_qualified_type (tmp, cp_type_quals (function));
11693 tmp = build_exception_variant (tmp,
11694 TYPE_RAISES_EXCEPTIONS (function));
11695 TREE_TYPE (decl) = tmp;
11696 if (DECL_ARGUMENTS (decl))
11697 DECL_ARGUMENTS (decl) = TREE_CHAIN (DECL_ARGUMENTS (decl));
11698 DECL_STATIC_FUNCTION_P (decl) = 1;
11701 /* Initialize the variables used during compilation of a C++
11705 cxx_push_function_context (struct function * f)
11707 struct language_function *p = GGC_CNEW (struct language_function);
11710 /* Whenever we start a new function, we destroy temporaries in the
11712 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
11718 if (DECL_SAVED_FUNCTION_DATA (fn))
11720 /* If we already parsed this function, and we're just expanding it
11721 now, restore saved state. */
11722 *cp_function_chain = *DECL_SAVED_FUNCTION_DATA (fn);
11724 /* We don't need the saved data anymore. Unless this is an inline
11725 function; we need the named return value info for
11726 declare_return_variable. */
11727 if (! DECL_INLINE (fn))
11728 DECL_SAVED_FUNCTION_DATA (fn) = NULL;
11733 /* Free the language-specific parts of F, now that we've finished
11734 compiling the function. */
11737 cxx_pop_function_context (struct function * f)
11742 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
11743 one of the language-independent trees. */
11745 enum cp_tree_node_structure_enum
11746 cp_tree_node_structure (union lang_tree_node * t)
11748 switch (TREE_CODE (&t->generic))
11750 case DEFAULT_ARG: return TS_CP_DEFAULT_ARG;
11751 case IDENTIFIER_NODE: return TS_CP_IDENTIFIER;
11752 case OVERLOAD: return TS_CP_OVERLOAD;
11753 case TEMPLATE_PARM_INDEX: return TS_CP_TPI;
11754 case TINST_LEVEL: return TS_CP_TINST_LEVEL;
11755 case PTRMEM_CST: return TS_CP_PTRMEM;
11756 case BASELINK: return TS_CP_BASELINK;
11757 case STATIC_ASSERT: return TS_CP_STATIC_ASSERT;
11758 case ARGUMENT_PACK_SELECT: return TS_CP_ARGUMENT_PACK_SELECT;
11759 case TRAIT_EXPR: return TS_CP_TRAIT_EXPR;
11760 default: return TS_CP_GENERIC;
11764 /* Build the void_list_node (void_type_node having been created). */
11766 build_void_list_node (void)
11768 tree t = build_tree_list (NULL_TREE, void_type_node);
11773 cp_missing_noreturn_ok_p (tree decl)
11775 /* A missing noreturn is ok for the `main' function. */
11776 return DECL_MAIN_P (decl);
11779 /* Return the COMDAT group into which DECL should be placed. */
11782 cxx_comdat_group (tree decl)
11786 /* Virtual tables, construction virtual tables, and virtual table
11787 tables all go in a single COMDAT group, named after the primary
11789 if (TREE_CODE (decl) == VAR_DECL && DECL_VTABLE_OR_VTT_P (decl))
11790 name = DECL_ASSEMBLER_NAME (CLASSTYPE_VTABLES (DECL_CONTEXT (decl)));
11791 /* For all other DECLs, the COMDAT group is the mangled name of the
11792 declaration itself. */
11795 while (DECL_THUNK_P (decl))
11797 /* If TARGET_USE_LOCAL_THUNK_ALIAS_P, use_thunk puts the thunk
11798 into the same section as the target function. In that case
11799 we must return target's name. */
11800 tree target = THUNK_TARGET (decl);
11801 if (TARGET_USE_LOCAL_THUNK_ALIAS_P (target)
11802 && DECL_SECTION_NAME (target) != NULL
11803 && DECL_ONE_ONLY (target))
11808 name = DECL_ASSEMBLER_NAME (decl);
11811 return IDENTIFIER_POINTER (name);
11814 #include "gt-cp-decl.h"