1 /* Process declarations and variables for C++ compiler.
2 Copyright (C) 1988, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
3 2001, 2002, 2003, 2004, 2005, 2006, 2007 Free Software Foundation, Inc.
4 Contributed by Michael Tiemann (tiemann@cygnus.com)
6 This file is part of GCC.
8 GCC is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2, or (at your option)
13 GCC is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING. If not, write to
20 the Free Software Foundation, 51 Franklin Street, Fifth Floor,
21 Boston, MA 02110-1301, USA. */
24 /* Process declarations and symbol lookup for C++ front end.
25 Also constructs types; the standard scalar types at initialization,
26 and structure, union, array and enum types when they are declared. */
28 /* ??? not all decl nodes are given the most useful possible
29 line numbers. For example, the CONST_DECLs for enum values. */
33 #include "coretypes.h"
40 #include "tree-inline.h"
50 #include "diagnostic.h"
54 #include "tree-flow.h"
55 #include "pointer-set.h"
57 static tree grokparms (cp_parameter_declarator *, tree *);
58 static const char *redeclaration_error_message (tree, tree);
60 static int decl_jump_unsafe (tree);
61 static void require_complete_types_for_parms (tree);
62 static int ambi_op_p (enum tree_code);
63 static int unary_op_p (enum tree_code);
64 static void push_local_name (tree);
65 static tree grok_reference_init (tree, tree, tree, tree *);
66 static tree grokvardecl (tree, tree, const cp_decl_specifier_seq *,
68 static void record_unknown_type (tree, const char *);
69 static tree builtin_function_1 (tree, tree);
70 static tree build_library_fn_1 (tree, enum tree_code, tree);
71 static int member_function_or_else (tree, tree, enum overload_flags);
72 static void bad_specifiers (tree, const char *, int, int, int, int,
74 static void check_for_uninitialized_const_var (tree);
75 static hashval_t typename_hash (const void *);
76 static int typename_compare (const void *, const void *);
77 static tree local_variable_p_walkfn (tree *, int *, void *);
78 static tree record_builtin_java_type (const char *, int);
79 static const char *tag_name (enum tag_types);
80 static tree lookup_and_check_tag (enum tag_types, tree, tag_scope, bool);
81 static int walk_namespaces_r (tree, walk_namespaces_fn, void *);
82 static void maybe_deduce_size_from_array_init (tree, tree);
83 static void layout_var_decl (tree);
84 static void maybe_commonize_var (tree);
85 static tree check_initializer (tree, tree, int, tree *);
86 static void make_rtl_for_nonlocal_decl (tree, tree, const char *);
87 static void save_function_data (tree);
88 static void check_function_type (tree, tree);
89 static void finish_constructor_body (void);
90 static void begin_destructor_body (void);
91 static void finish_destructor_body (void);
92 static tree create_array_type_for_decl (tree, tree, tree);
93 static tree get_atexit_node (void);
94 static tree get_dso_handle_node (void);
95 static tree start_cleanup_fn (void);
96 static void end_cleanup_fn (void);
97 static tree cp_make_fname_decl (tree, int);
98 static void initialize_predefined_identifiers (void);
99 static tree check_special_function_return_type
100 (special_function_kind, tree, tree);
101 static tree push_cp_library_fn (enum tree_code, tree);
102 static tree build_cp_library_fn (tree, enum tree_code, tree);
103 static void store_parm_decls (tree);
104 static void initialize_local_var (tree, tree);
105 static void expand_static_init (tree, tree);
106 static tree next_initializable_field (tree);
108 /* The following symbols are subsumed in the cp_global_trees array, and
109 listed here individually for documentation purposes.
112 tree wchar_decl_node;
114 tree vtable_entry_type;
115 tree delta_type_node;
116 tree __t_desc_type_node;
118 tree class_type_node;
119 tree unknown_type_node;
121 Array type `vtable_entry_type[]'
124 tree vtbl_ptr_type_node;
131 A FUNCTION_DECL which can call `abort'. Not necessarily the
132 one that the user will declare, but sufficient to be called
133 by routines that want to abort the program.
137 The FUNCTION_DECL for the default `::operator delete'.
139 tree global_delete_fndecl;
142 tree type_info_type_node, tinfo_decl_id, tinfo_decl_type;
143 tree tinfo_var_id; */
145 tree cp_global_trees[CPTI_MAX];
147 /* Indicates that there is a type value in some namespace, although
148 that is not necessarily in scope at the moment. */
150 tree global_type_node;
152 /* The node that holds the "name" of the global scope. */
153 tree global_scope_name;
155 #define local_names cp_function_chain->x_local_names
157 /* A list of objects which have constructors or destructors
158 which reside in the global scope. The decl is stored in
159 the TREE_VALUE slot and the initializer is stored
160 in the TREE_PURPOSE slot. */
161 tree static_aggregates;
165 /* A node for the integer constants 2, and 3. */
167 tree integer_two_node, integer_three_node;
169 /* Used only for jumps to as-yet undefined labels, since jumps to
170 defined labels can have their validity checked immediately. */
172 struct named_label_use_entry GTY(())
174 struct named_label_use_entry *next;
175 /* The binding level to which this entry is *currently* attached.
176 This is initially the binding level in which the goto appeared,
177 but is modified as scopes are closed. */
178 struct cp_binding_level *binding_level;
179 /* The head of the names list that was current when the goto appeared,
180 or the inner scope popped. These are the decls that will *not* be
181 skipped when jumping to the label. */
183 /* The location of the goto, for error reporting. */
184 location_t o_goto_locus;
185 /* True if an OpenMP structured block scope has been closed since
186 the goto appeared. This means that the branch from the label will
187 illegally exit an OpenMP scope. */
191 /* A list of all LABEL_DECLs in the function that have names. Here so
192 we can clear out their names' definitions at the end of the
193 function, and so we can check the validity of jumps to these labels. */
195 struct named_label_entry GTY(())
197 /* The decl itself. */
200 /* The binding level to which the label is *currently* attached.
201 This is initially set to the binding level in which the label
202 is defined, but is modified as scopes are closed. */
203 struct cp_binding_level *binding_level;
204 /* The head of the names list that was current when the label was
205 defined, or the inner scope popped. These are the decls that will
206 be skipped when jumping to the label. */
208 /* A tree list of all decls from all binding levels that would be
209 crossed by a backward branch to the label. */
212 /* A list of uses of the label, before the label is defined. */
213 struct named_label_use_entry *uses;
215 /* The following bits are set after the label is defined, and are
216 updated as scopes are popped. They indicate that a backward jump
217 to the label will illegally enter a scope of the given flavor. */
223 #define named_labels cp_function_chain->x_named_labels
225 /* The number of function bodies which we are currently processing.
226 (Zero if we are at namespace scope, one inside the body of a
227 function, two inside the body of a function in a local class, etc.) */
230 /* States indicating how grokdeclarator() should handle declspecs marked
231 with __attribute__((deprecated)). An object declared as
232 __attribute__((deprecated)) suppresses warnings of uses of other
235 enum deprecated_states {
240 static enum deprecated_states deprecated_state = DEPRECATED_NORMAL;
243 /* A TREE_LIST of VAR_DECLs. The TREE_PURPOSE is a RECORD_TYPE or
244 UNION_TYPE; the TREE_VALUE is a VAR_DECL with that type. At the
245 time the VAR_DECL was declared, the type was incomplete. */
247 static GTY(()) tree incomplete_vars;
249 /* Returns the kind of template specialization we are currently
250 processing, given that it's declaration contained N_CLASS_SCOPES
251 explicit scope qualifications. */
254 current_tmpl_spec_kind (int n_class_scopes)
256 int n_template_parm_scopes = 0;
257 int seen_specialization_p = 0;
258 int innermost_specialization_p = 0;
259 struct cp_binding_level *b;
261 /* Scan through the template parameter scopes. */
262 for (b = current_binding_level;
263 b->kind == sk_template_parms;
266 /* If we see a specialization scope inside a parameter scope,
267 then something is wrong. That corresponds to a declaration
270 template <class T> template <> ...
272 which is always invalid since [temp.expl.spec] forbids the
273 specialization of a class member template if the enclosing
274 class templates are not explicitly specialized as well. */
275 if (b->explicit_spec_p)
277 if (n_template_parm_scopes == 0)
278 innermost_specialization_p = 1;
280 seen_specialization_p = 1;
282 else if (seen_specialization_p == 1)
283 return tsk_invalid_member_spec;
285 ++n_template_parm_scopes;
288 /* Handle explicit instantiations. */
289 if (processing_explicit_instantiation)
291 if (n_template_parm_scopes != 0)
292 /* We've seen a template parameter list during an explicit
293 instantiation. For example:
295 template <class T> template void f(int);
297 This is erroneous. */
298 return tsk_invalid_expl_inst;
300 return tsk_expl_inst;
303 if (n_template_parm_scopes < n_class_scopes)
304 /* We've not seen enough template headers to match all the
305 specialized classes present. For example:
307 template <class T> void R<T>::S<T>::f(int);
309 This is invalid; there needs to be one set of template
310 parameters for each class. */
311 return tsk_insufficient_parms;
312 else if (n_template_parm_scopes == n_class_scopes)
313 /* We're processing a non-template declaration (even though it may
314 be a member of a template class.) For example:
316 template <class T> void S<T>::f(int);
318 The `class T' maches the `S<T>', leaving no template headers
319 corresponding to the `f'. */
321 else if (n_template_parm_scopes > n_class_scopes + 1)
322 /* We've got too many template headers. For example:
324 template <> template <class T> void f (T);
326 There need to be more enclosing classes. */
327 return tsk_excessive_parms;
329 /* This must be a template. It's of the form:
331 template <class T> template <class U> void S<T>::f(U);
333 This is a specialization if the innermost level was a
334 specialization; otherwise it's just a definition of the
336 return innermost_specialization_p ? tsk_expl_spec : tsk_template;
339 /* Exit the current scope. */
347 /* When a label goes out of scope, check to see if that label was used
348 in a valid manner, and issue any appropriate warnings or errors. */
351 pop_label (tree label, tree old_value)
353 if (!processing_template_decl)
355 if (DECL_INITIAL (label) == NULL_TREE)
359 error ("label %q+D used but not defined", label);
360 #ifdef USE_MAPPED_LOCATION
361 location = input_location; /* FIXME want (input_filename, (line)0) */
363 location.file = input_filename;
366 /* Avoid crashing later. */
367 define_label (location, DECL_NAME (label));
370 warn_for_unused_label (label);
373 SET_IDENTIFIER_LABEL_VALUE (DECL_NAME (label), old_value);
376 /* At the end of a function, all labels declared within the function
377 go out of scope. BLOCK is the top-level block for the
381 pop_labels_1 (void **slot, void *data)
383 struct named_label_entry *ent = (struct named_label_entry *) *slot;
384 tree block = (tree) data;
386 pop_label (ent->label_decl, NULL_TREE);
388 /* Put the labels into the "variables" of the top-level block,
389 so debugger can see them. */
390 TREE_CHAIN (ent->label_decl) = BLOCK_VARS (block);
391 BLOCK_VARS (block) = ent->label_decl;
393 htab_clear_slot (named_labels, slot);
399 pop_labels (tree block)
403 htab_traverse (named_labels, pop_labels_1, block);
408 /* At the end of a block with local labels, restore the outer definition. */
411 pop_local_label (tree label, tree old_value)
413 struct named_label_entry dummy;
416 pop_label (label, old_value);
418 dummy.label_decl = label;
419 slot = htab_find_slot (named_labels, &dummy, NO_INSERT);
420 htab_clear_slot (named_labels, slot);
423 /* The following two routines are used to interface to Objective-C++.
424 The binding level is purposely treated as an opaque type. */
427 objc_get_current_scope (void)
429 return current_binding_level;
432 /* The following routine is used by the NeXT-style SJLJ exceptions;
433 variables get marked 'volatile' so as to not be clobbered by
434 _setjmp()/_longjmp() calls. All variables in the current scope,
435 as well as parent scopes up to (but not including) ENCLOSING_BLK
436 shall be thusly marked. */
439 objc_mark_locals_volatile (void *enclosing_blk)
441 struct cp_binding_level *scope;
443 for (scope = current_binding_level;
444 scope && scope != enclosing_blk;
445 scope = scope->level_chain)
449 for (decl = scope->names; decl; decl = TREE_CHAIN (decl))
450 objc_volatilize_decl (decl);
452 /* Do not climb up past the current function. */
453 if (scope->kind == sk_function_parms)
458 /* Update data for defined and undefined labels when leaving a scope. */
461 poplevel_named_label_1 (void **slot, void *data)
463 struct named_label_entry *ent = (struct named_label_entry *) *slot;
464 struct cp_binding_level *bl = (struct cp_binding_level *) data;
465 struct cp_binding_level *obl = bl->level_chain;
467 if (ent->binding_level == bl)
471 for (decl = ent->names_in_scope; decl; decl = TREE_CHAIN (decl))
472 if (decl_jump_unsafe (decl))
473 ent->bad_decls = tree_cons (NULL, decl, ent->bad_decls);
475 ent->binding_level = obl;
476 ent->names_in_scope = obl->names;
480 ent->in_try_scope = true;
483 ent->in_catch_scope = true;
486 ent->in_omp_scope = true;
494 struct named_label_use_entry *use;
496 for (use = ent->uses; use ; use = use->next)
497 if (use->binding_level == bl)
499 use->binding_level = obl;
500 use->names_in_scope = obl->names;
501 if (bl->kind == sk_omp)
502 use->in_omp_scope = true;
509 /* Exit a binding level.
510 Pop the level off, and restore the state of the identifier-decl mappings
511 that were in effect when this level was entered.
513 If KEEP == 1, this level had explicit declarations, so
514 and create a "block" (a BLOCK node) for the level
515 to record its declarations and subblocks for symbol table output.
517 If FUNCTIONBODY is nonzero, this level is the body of a function,
518 so create a block as if KEEP were set and also clear out all
521 If REVERSE is nonzero, reverse the order of decls before putting
522 them into the BLOCK. */
525 poplevel (int keep, int reverse, int functionbody)
528 /* The chain of decls was accumulated in reverse order.
529 Put it into forward order, just for cleanliness. */
531 int tmp = functionbody;
532 int real_functionbody;
536 int leaving_for_scope;
539 timevar_push (TV_NAME_LOOKUP);
544 gcc_assert (current_binding_level->kind != sk_class);
546 real_functionbody = (current_binding_level->kind == sk_cleanup
547 ? ((functionbody = 0), tmp) : functionbody);
548 subblocks = functionbody >= 0 ? current_binding_level->blocks : 0;
550 gcc_assert (!VEC_length(cp_class_binding,
551 current_binding_level->class_shadowed));
553 /* We used to use KEEP == 2 to indicate that the new block should go
554 at the beginning of the list of blocks at this binding level,
555 rather than the end. This hack is no longer used. */
556 gcc_assert (keep == 0 || keep == 1);
558 if (current_binding_level->keep)
561 /* Any uses of undefined labels, and any defined labels, now operate
562 under constraints of next binding contour. */
563 if (cfun && !functionbody && named_labels)
564 htab_traverse (named_labels, poplevel_named_label_1,
565 current_binding_level);
567 /* Get the decls in the order they were written.
568 Usually current_binding_level->names is in reverse order.
569 But parameter decls were previously put in forward order. */
572 current_binding_level->names
573 = decls = nreverse (current_binding_level->names);
575 decls = current_binding_level->names;
577 /* If there were any declarations or structure tags in that level,
578 or if this level is a function body,
579 create a BLOCK to record them for the life of this function. */
581 if (keep == 1 || functionbody)
582 block = make_node (BLOCK);
583 if (block != NULL_TREE)
585 BLOCK_VARS (block) = decls;
586 BLOCK_SUBBLOCKS (block) = subblocks;
589 /* In each subblock, record that this is its superior. */
591 for (link = subblocks; link; link = TREE_CHAIN (link))
592 BLOCK_SUPERCONTEXT (link) = block;
594 /* We still support the old for-scope rules, whereby the variables
595 in a for-init statement were in scope after the for-statement
596 ended. We only use the new rules if flag_new_for_scope is
599 = current_binding_level->kind == sk_for && flag_new_for_scope == 1;
601 /* Before we remove the declarations first check for unused variables. */
602 if (warn_unused_variable
603 && !processing_template_decl)
604 for (decl = getdecls (); decl; decl = TREE_CHAIN (decl))
605 if (TREE_CODE (decl) == VAR_DECL
606 && ! TREE_USED (decl)
607 && ! DECL_IN_SYSTEM_HEADER (decl)
608 && DECL_NAME (decl) && ! DECL_ARTIFICIAL (decl))
609 warning (OPT_Wunused_variable, "unused variable %q+D", decl);
611 /* Remove declarations for all the DECLs in this level. */
612 for (link = decls; link; link = TREE_CHAIN (link))
614 if (leaving_for_scope && TREE_CODE (link) == VAR_DECL
617 tree name = DECL_NAME (link);
621 ob = outer_binding (name,
622 IDENTIFIER_BINDING (name),
625 ns_binding = IDENTIFIER_NAMESPACE_VALUE (name);
627 ns_binding = NULL_TREE;
629 if (ob && ob->scope == current_binding_level->level_chain)
630 /* We have something like:
635 and we are leaving the `for' scope. There's no reason to
636 keep the binding of the inner `i' in this case. */
637 pop_binding (name, link);
638 else if ((ob && (TREE_CODE (ob->value) == TYPE_DECL))
639 || (ns_binding && TREE_CODE (ns_binding) == TYPE_DECL))
640 /* Here, we have something like:
648 We must pop the for-scope binding so we know what's a
649 type and what isn't. */
650 pop_binding (name, link);
653 /* Mark this VAR_DECL as dead so that we can tell we left it
654 there only for backward compatibility. */
655 DECL_DEAD_FOR_LOCAL (link) = 1;
657 /* Keep track of what should have happened when we
658 popped the binding. */
661 SET_DECL_SHADOWED_FOR_VAR (link, ob->value);
662 DECL_HAS_SHADOWED_FOR_VAR_P (link) = 1;
665 /* Add it to the list of dead variables in the next
666 outermost binding to that we can remove these when we
667 leave that binding. */
668 current_binding_level->level_chain->dead_vars_from_for
669 = tree_cons (NULL_TREE, link,
670 current_binding_level->level_chain->
673 /* Although we don't pop the cxx_binding, we do clear
674 its SCOPE since the scope is going away now. */
675 IDENTIFIER_BINDING (name)->scope
676 = current_binding_level->level_chain;
683 /* Remove the binding. */
686 if (TREE_CODE (decl) == TREE_LIST)
687 decl = TREE_VALUE (decl);
690 if (TREE_CODE (name) == OVERLOAD)
691 name = OVL_FUNCTION (name);
693 gcc_assert (DECL_P (name));
694 pop_binding (DECL_NAME (name), decl);
698 /* Remove declarations for any `for' variables from inner scopes
699 that we kept around. */
700 for (link = current_binding_level->dead_vars_from_for;
701 link; link = TREE_CHAIN (link))
702 pop_binding (DECL_NAME (TREE_VALUE (link)), TREE_VALUE (link));
704 /* Restore the IDENTIFIER_TYPE_VALUEs. */
705 for (link = current_binding_level->type_shadowed;
706 link; link = TREE_CHAIN (link))
707 SET_IDENTIFIER_TYPE_VALUE (TREE_PURPOSE (link), TREE_VALUE (link));
709 /* Restore the IDENTIFIER_LABEL_VALUEs for local labels. */
710 for (link = current_binding_level->shadowed_labels;
712 link = TREE_CHAIN (link))
713 pop_local_label (TREE_VALUE (link), TREE_PURPOSE (link));
715 /* There may be OVERLOADs (wrapped in TREE_LISTs) on the BLOCK_VARs
716 list if a `using' declaration put them there. The debugging
717 back ends won't understand OVERLOAD, so we remove them here.
718 Because the BLOCK_VARS are (temporarily) shared with
719 CURRENT_BINDING_LEVEL->NAMES we must do this fixup after we have
720 popped all the bindings. */
725 for (d = &BLOCK_VARS (block); *d; )
727 if (TREE_CODE (*d) == TREE_LIST)
728 *d = TREE_CHAIN (*d);
730 d = &TREE_CHAIN (*d);
734 /* If the level being exited is the top level of a function,
735 check over all the labels. */
738 /* Since this is the top level block of a function, the vars are
739 the function's parameters. Don't leave them in the BLOCK
740 because they are found in the FUNCTION_DECL instead. */
741 BLOCK_VARS (block) = 0;
745 kind = current_binding_level->kind;
746 if (kind == sk_cleanup)
750 /* If this is a temporary binding created for a cleanup, then we'll
751 have pushed a statement list level. Pop that, create a new
752 BIND_EXPR for the block, and insert it into the stream. */
753 stmt = pop_stmt_list (current_binding_level->statement_list);
754 stmt = c_build_bind_expr (block, stmt);
761 /* The current function is being defined, so its DECL_INITIAL
762 should be error_mark_node. */
763 gcc_assert (DECL_INITIAL (current_function_decl) == error_mark_node);
764 DECL_INITIAL (current_function_decl) = block;
767 current_binding_level->blocks
768 = chainon (current_binding_level->blocks, block);
770 /* If we did not make a block for the level just exited,
771 any blocks made for inner levels
772 (since they cannot be recorded as subblocks in that level)
773 must be carried forward so they will later become subblocks
774 of something else. */
776 current_binding_level->blocks
777 = chainon (current_binding_level->blocks, subblocks);
779 /* Each and every BLOCK node created here in `poplevel' is important
780 (e.g. for proper debugging information) so if we created one
781 earlier, mark it as "used". */
783 TREE_USED (block) = 1;
785 /* All temporary bindings created for cleanups are popped silently. */
786 if (kind == sk_cleanup)
789 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, block);
792 /* Insert BLOCK at the end of the list of subblocks of the
793 current binding level. This is used when a BIND_EXPR is expanded,
794 to handle the BLOCK node inside the BIND_EXPR. */
797 insert_block (tree block)
799 TREE_USED (block) = 1;
800 current_binding_level->blocks
801 = chainon (current_binding_level->blocks, block);
804 /* Walk all the namespaces contained NAMESPACE, including NAMESPACE
805 itself, calling F for each. The DATA is passed to F as well. */
808 walk_namespaces_r (tree namespace, walk_namespaces_fn f, void* data)
811 tree current = NAMESPACE_LEVEL (namespace)->namespaces;
813 result |= (*f) (namespace, data);
815 for (; current; current = TREE_CHAIN (current))
816 result |= walk_namespaces_r (current, f, data);
821 /* Walk all the namespaces, calling F for each. The DATA is passed to
825 walk_namespaces (walk_namespaces_fn f, void* data)
827 return walk_namespaces_r (global_namespace, f, data);
830 /* Call wrapup_globals_declarations for the globals in NAMESPACE. If
831 DATA is non-NULL, this is the last time we will call
832 wrapup_global_declarations for this NAMESPACE. */
835 wrapup_globals_for_namespace (tree namespace, void* data)
837 struct cp_binding_level *level = NAMESPACE_LEVEL (namespace);
838 VEC(tree,gc) *statics = level->static_decls;
839 tree *vec = VEC_address (tree, statics);
840 int len = VEC_length (tree, statics);
841 int last_time = (data != 0);
845 check_global_declarations (vec, len);
846 emit_debug_global_declarations (vec, len);
850 /* Write out any globals that need to be output. */
851 return wrapup_global_declarations (vec, len);
855 /* In C++, you don't have to write `struct S' to refer to `S'; you
856 can just use `S'. We accomplish this by creating a TYPE_DECL as
857 if the user had written `typedef struct S S'. Create and return
858 the TYPE_DECL for TYPE. */
861 create_implicit_typedef (tree name, tree type)
865 decl = build_decl (TYPE_DECL, name, type);
866 DECL_ARTIFICIAL (decl) = 1;
867 /* There are other implicit type declarations, like the one *within*
868 a class that allows you to write `S::S'. We must distinguish
870 SET_DECL_IMPLICIT_TYPEDEF_P (decl);
871 TYPE_NAME (type) = decl;
876 /* Remember a local name for name-mangling purposes. */
879 push_local_name (tree decl)
884 timevar_push (TV_NAME_LOOKUP);
886 name = DECL_NAME (decl);
888 nelts = VEC_length (tree, local_names);
889 for (i = 0; i < nelts; i++)
891 t = VEC_index (tree, local_names, i);
892 if (DECL_NAME (t) == name)
894 if (!DECL_LANG_SPECIFIC (decl))
895 retrofit_lang_decl (decl);
896 DECL_LANG_SPECIFIC (decl)->decl_flags.u2sel = 1;
897 if (DECL_LANG_SPECIFIC (t))
898 DECL_DISCRIMINATOR (decl) = DECL_DISCRIMINATOR (t) + 1;
900 DECL_DISCRIMINATOR (decl) = 1;
902 VEC_replace (tree, local_names, i, decl);
903 timevar_pop (TV_NAME_LOOKUP);
908 VEC_safe_push (tree, gc, local_names, decl);
909 timevar_pop (TV_NAME_LOOKUP);
912 /* Subroutine of duplicate_decls: return truthvalue of whether
913 or not types of these decls match.
915 For C++, we must compare the parameter list so that `int' can match
916 `int&' in a parameter position, but `int&' is not confused with
920 decls_match (tree newdecl, tree olddecl)
924 if (newdecl == olddecl)
927 if (TREE_CODE (newdecl) != TREE_CODE (olddecl))
928 /* If the two DECLs are not even the same kind of thing, we're not
929 interested in their types. */
932 if (TREE_CODE (newdecl) == FUNCTION_DECL)
934 tree f1 = TREE_TYPE (newdecl);
935 tree f2 = TREE_TYPE (olddecl);
936 tree p1 = TYPE_ARG_TYPES (f1);
937 tree p2 = TYPE_ARG_TYPES (f2);
939 if (CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl)
940 && ! (DECL_EXTERN_C_P (newdecl)
941 && DECL_EXTERN_C_P (olddecl)))
944 if (TREE_CODE (f1) != TREE_CODE (f2))
947 if (same_type_p (TREE_TYPE (f1), TREE_TYPE (f2)))
949 if (p2 == NULL_TREE && DECL_EXTERN_C_P (olddecl)
950 && (DECL_BUILT_IN (olddecl)
951 #ifndef NO_IMPLICIT_EXTERN_C
952 || (DECL_IN_SYSTEM_HEADER (newdecl) && !DECL_CLASS_SCOPE_P (newdecl))
953 || (DECL_IN_SYSTEM_HEADER (olddecl) && !DECL_CLASS_SCOPE_P (olddecl))
957 types_match = self_promoting_args_p (p1);
958 if (p1 == void_list_node)
959 TREE_TYPE (newdecl) = TREE_TYPE (olddecl);
961 #ifndef NO_IMPLICIT_EXTERN_C
962 else if (p1 == NULL_TREE
963 && (DECL_EXTERN_C_P (olddecl)
964 && DECL_IN_SYSTEM_HEADER (olddecl)
965 && !DECL_CLASS_SCOPE_P (olddecl))
966 && (DECL_EXTERN_C_P (newdecl)
967 && DECL_IN_SYSTEM_HEADER (newdecl)
968 && !DECL_CLASS_SCOPE_P (newdecl)))
970 types_match = self_promoting_args_p (p2);
971 TREE_TYPE (newdecl) = TREE_TYPE (olddecl);
975 types_match = compparms (p1, p2);
980 else if (TREE_CODE (newdecl) == TEMPLATE_DECL)
982 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl))
983 != TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)))
986 if (!comp_template_parms (DECL_TEMPLATE_PARMS (newdecl),
987 DECL_TEMPLATE_PARMS (olddecl)))
990 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
991 types_match = same_type_p (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl)),
992 TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl)));
994 types_match = decls_match (DECL_TEMPLATE_RESULT (olddecl),
995 DECL_TEMPLATE_RESULT (newdecl));
999 /* Need to check scope for variable declaration (VAR_DECL).
1000 For typedef (TYPE_DECL), scope is ignored. */
1001 if (TREE_CODE (newdecl) == VAR_DECL
1002 && CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl)
1004 Two declarations for an object with C language linkage
1005 with the same name (ignoring the namespace that qualify
1006 it) that appear in different namespace scopes refer to
1008 && !(DECL_EXTERN_C_P (olddecl) && DECL_EXTERN_C_P (newdecl)))
1011 if (TREE_TYPE (newdecl) == error_mark_node)
1012 types_match = TREE_TYPE (olddecl) == error_mark_node;
1013 else if (TREE_TYPE (olddecl) == NULL_TREE)
1014 types_match = TREE_TYPE (newdecl) == NULL_TREE;
1015 else if (TREE_TYPE (newdecl) == NULL_TREE)
1018 types_match = comptypes (TREE_TYPE (newdecl),
1019 TREE_TYPE (olddecl),
1020 COMPARE_REDECLARATION);
1026 /* If NEWDECL is `static' and an `extern' was seen previously,
1027 warn about it. OLDDECL is the previous declaration.
1029 Note that this does not apply to the C++ case of declaring
1030 a variable `extern const' and then later `const'.
1032 Don't complain about built-in functions, since they are beyond
1033 the user's control. */
1036 warn_extern_redeclared_static (tree newdecl, tree olddecl)
1040 if (TREE_CODE (newdecl) == TYPE_DECL
1041 || TREE_CODE (newdecl) == TEMPLATE_DECL
1042 || TREE_CODE (newdecl) == CONST_DECL
1043 || TREE_CODE (newdecl) == NAMESPACE_DECL)
1046 /* Don't get confused by static member functions; that's a different
1048 if (TREE_CODE (newdecl) == FUNCTION_DECL
1049 && DECL_STATIC_FUNCTION_P (newdecl))
1052 /* If the old declaration was `static', or the new one isn't, then
1053 then everything is OK. */
1054 if (DECL_THIS_STATIC (olddecl) || !DECL_THIS_STATIC (newdecl))
1057 /* It's OK to declare a builtin function as `static'. */
1058 if (TREE_CODE (olddecl) == FUNCTION_DECL
1059 && DECL_ARTIFICIAL (olddecl))
1062 name = DECL_ASSEMBLER_NAME (newdecl);
1063 pedwarn ("%qD was declared %<extern%> and later %<static%>", newdecl);
1064 pedwarn ("previous declaration of %q+D", olddecl);
1067 /* NEW_DECL is a redeclaration of OLD_DECL; both are functions or
1068 function templates. If their exception specifications do not
1069 match, issue a diagnostic. */
1072 check_redeclaration_exception_specification (tree new_decl,
1077 tree new_exceptions;
1078 tree old_exceptions;
1080 new_type = TREE_TYPE (new_decl);
1081 new_exceptions = TYPE_RAISES_EXCEPTIONS (new_type);
1082 old_type = TREE_TYPE (old_decl);
1083 old_exceptions = TYPE_RAISES_EXCEPTIONS (old_type);
1087 If any declaration of a function has an exception-specification,
1088 all declarations, including the definition and an explicit
1089 specialization, of that function shall have an
1090 exception-specification with the same set of type-ids. */
1091 if ((pedantic || ! DECL_IN_SYSTEM_HEADER (old_decl))
1092 && ! DECL_IS_BUILTIN (old_decl)
1094 && !comp_except_specs (new_exceptions, old_exceptions,
1097 error ("declaration of %qF throws different exceptions", new_decl);
1098 error ("from previous declaration %q+F", old_decl);
1102 /* If NEWDECL is a redeclaration of OLDDECL, merge the declarations.
1103 If the redeclaration is invalid, a diagnostic is issued, and the
1104 error_mark_node is returned. Otherwise, OLDDECL is returned.
1106 If NEWDECL is not a redeclaration of OLDDECL, NULL_TREE is
1109 NEWDECL_IS_FRIEND is true if NEWDECL was declared as a friend. */
1112 duplicate_decls (tree newdecl, tree olddecl, bool newdecl_is_friend)
1114 unsigned olddecl_uid = DECL_UID (olddecl);
1115 int olddecl_friend = 0, types_match = 0, hidden_friend = 0;
1116 int new_defines_function = 0;
1119 if (newdecl == olddecl)
1122 types_match = decls_match (newdecl, olddecl);
1124 /* If either the type of the new decl or the type of the old decl is an
1125 error_mark_node, then that implies that we have already issued an
1126 error (earlier) for some bogus type specification, and in that case,
1127 it is rather pointless to harass the user with yet more error message
1128 about the same declaration, so just pretend the types match here. */
1129 if (TREE_TYPE (newdecl) == error_mark_node
1130 || TREE_TYPE (olddecl) == error_mark_node)
1131 return error_mark_node;
1133 if (DECL_P (olddecl)
1134 && TREE_CODE (newdecl) == FUNCTION_DECL
1135 && TREE_CODE (olddecl) == FUNCTION_DECL
1136 && (DECL_UNINLINABLE (newdecl) || DECL_UNINLINABLE (olddecl)))
1138 if (DECL_DECLARED_INLINE_P (newdecl)
1139 && DECL_UNINLINABLE (newdecl)
1140 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl)))
1141 /* Already warned elsewhere. */;
1142 else if (DECL_DECLARED_INLINE_P (olddecl)
1143 && DECL_UNINLINABLE (olddecl)
1144 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl)))
1145 /* Already warned. */;
1146 else if (DECL_DECLARED_INLINE_P (newdecl)
1147 && DECL_UNINLINABLE (olddecl)
1148 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl)))
1150 warning (OPT_Wattributes, "function %q+D redeclared as inline",
1152 warning (OPT_Wattributes, "previous declaration of %q+D "
1153 "with attribute noinline", olddecl);
1155 else if (DECL_DECLARED_INLINE_P (olddecl)
1156 && DECL_UNINLINABLE (newdecl)
1157 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl)))
1159 warning (OPT_Wattributes, "function %q+D redeclared with "
1160 "attribute noinline", newdecl);
1161 warning (OPT_Wattributes, "previous declaration of %q+D was inline",
1166 /* Check for redeclaration and other discrepancies. */
1167 if (TREE_CODE (olddecl) == FUNCTION_DECL
1168 && DECL_ARTIFICIAL (olddecl))
1170 gcc_assert (!DECL_HIDDEN_FRIEND_P (olddecl));
1171 if (TREE_CODE (newdecl) != FUNCTION_DECL)
1173 /* Avoid warnings redeclaring built-ins which have not been
1174 explicitly declared. */
1175 if (DECL_ANTICIPATED (olddecl))
1178 /* If you declare a built-in or predefined function name as static,
1179 the old definition is overridden, but optionally warn this was a
1180 bad choice of name. */
1181 if (! TREE_PUBLIC (newdecl))
1183 warning (OPT_Wshadow, "shadowing %s function %q#D",
1184 DECL_BUILT_IN (olddecl) ? "built-in" : "library",
1186 /* Discard the old built-in function. */
1189 /* If the built-in is not ansi, then programs can override
1190 it even globally without an error. */
1191 else if (! DECL_BUILT_IN (olddecl))
1192 warning (0, "library function %q#D redeclared as non-function %q#D",
1196 error ("declaration of %q#D", newdecl);
1197 error ("conflicts with built-in declaration %q#D",
1202 else if (!types_match)
1204 /* Avoid warnings redeclaring built-ins which have not been
1205 explicitly declared. */
1206 if (DECL_ANTICIPATED (olddecl))
1208 /* Deal with fileptr_type_node. FILE type is not known
1209 at the time we create the builtins. */
1212 for (t1 = TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1213 t2 = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1215 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2))
1218 else if (TREE_VALUE (t2) == fileptr_type_node)
1220 tree t = TREE_VALUE (t1);
1222 if (TREE_CODE (t) == POINTER_TYPE
1223 && TYPE_NAME (TREE_TYPE (t))
1224 && DECL_NAME (TYPE_NAME (TREE_TYPE (t)))
1225 == get_identifier ("FILE")
1226 && compparms (TREE_CHAIN (t1), TREE_CHAIN (t2)))
1228 tree oldargs = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1230 TYPE_ARG_TYPES (TREE_TYPE (olddecl))
1231 = TYPE_ARG_TYPES (TREE_TYPE (newdecl));
1232 types_match = decls_match (newdecl, olddecl);
1234 return duplicate_decls (newdecl, olddecl,
1236 TYPE_ARG_TYPES (TREE_TYPE (olddecl)) = oldargs;
1239 else if (! same_type_p (TREE_VALUE (t1), TREE_VALUE (t2)))
1242 else if ((DECL_EXTERN_C_P (newdecl)
1243 && DECL_EXTERN_C_P (olddecl))
1244 || compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1245 TYPE_ARG_TYPES (TREE_TYPE (olddecl))))
1247 /* A near match; override the builtin. */
1249 if (TREE_PUBLIC (newdecl))
1251 warning (0, "new declaration %q#D", newdecl);
1252 warning (0, "ambiguates built-in declaration %q#D",
1256 warning (OPT_Wshadow, "shadowing %s function %q#D",
1257 DECL_BUILT_IN (olddecl) ? "built-in" : "library",
1261 /* Discard the old built-in function. */
1264 /* Replace the old RTL to avoid problems with inlining. */
1265 COPY_DECL_RTL (newdecl, olddecl);
1267 /* Even if the types match, prefer the new declarations type for
1268 built-ins which have not been explicitly declared, for
1269 exception lists, etc... */
1270 else if (DECL_ANTICIPATED (olddecl))
1272 tree type = TREE_TYPE (newdecl);
1273 tree attribs = (*targetm.merge_type_attributes)
1274 (TREE_TYPE (olddecl), type);
1276 type = cp_build_type_attribute_variant (type, attribs);
1277 TREE_TYPE (newdecl) = TREE_TYPE (olddecl) = type;
1280 /* Whether or not the builtin can throw exceptions has no
1281 bearing on this declarator. */
1282 TREE_NOTHROW (olddecl) = 0;
1284 if (DECL_THIS_STATIC (newdecl) && !DECL_THIS_STATIC (olddecl))
1286 /* If a builtin function is redeclared as `static', merge
1287 the declarations, but make the original one static. */
1288 DECL_THIS_STATIC (olddecl) = 1;
1289 TREE_PUBLIC (olddecl) = 0;
1291 /* Make the old declaration consistent with the new one so
1292 that all remnants of the builtin-ness of this function
1293 will be banished. */
1294 SET_DECL_LANGUAGE (olddecl, DECL_LANGUAGE (newdecl));
1295 COPY_DECL_RTL (newdecl, olddecl);
1298 else if (TREE_CODE (olddecl) != TREE_CODE (newdecl))
1300 /* C++ Standard, 3.3, clause 4:
1301 "[Note: a namespace name or a class template name must be unique
1302 in its declarative region (7.3.2, clause 14). ]" */
1303 if (TREE_CODE (olddecl) != NAMESPACE_DECL
1304 && TREE_CODE (newdecl) != NAMESPACE_DECL
1305 && (TREE_CODE (olddecl) != TEMPLATE_DECL
1306 || TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) != TYPE_DECL)
1307 && (TREE_CODE (newdecl) != TEMPLATE_DECL
1308 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) != TYPE_DECL))
1310 if ((TREE_CODE (olddecl) == TYPE_DECL && DECL_ARTIFICIAL (olddecl)
1311 && TREE_CODE (newdecl) != TYPE_DECL)
1312 || (TREE_CODE (newdecl) == TYPE_DECL && DECL_ARTIFICIAL (newdecl)
1313 && TREE_CODE (olddecl) != TYPE_DECL))
1315 /* We do nothing special here, because C++ does such nasty
1316 things with TYPE_DECLs. Instead, just let the TYPE_DECL
1317 get shadowed, and know that if we need to find a TYPE_DECL
1318 for a given name, we can look in the IDENTIFIER_TYPE_VALUE
1319 slot of the identifier. */
1323 if ((TREE_CODE (newdecl) == FUNCTION_DECL
1324 && DECL_FUNCTION_TEMPLATE_P (olddecl))
1325 || (TREE_CODE (olddecl) == FUNCTION_DECL
1326 && DECL_FUNCTION_TEMPLATE_P (newdecl)))
1330 error ("%q#D redeclared as different kind of symbol", newdecl);
1331 if (TREE_CODE (olddecl) == TREE_LIST)
1332 olddecl = TREE_VALUE (olddecl);
1333 error ("previous declaration of %q+#D", olddecl);
1335 return error_mark_node;
1337 else if (!types_match)
1339 if (CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl))
1340 /* These are certainly not duplicate declarations; they're
1341 from different scopes. */
1344 if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1346 /* The name of a class template may not be declared to refer to
1347 any other template, class, function, object, namespace, value,
1348 or type in the same scope. */
1349 if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) == TYPE_DECL
1350 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
1352 error ("declaration of template %q#D", newdecl);
1353 error ("conflicts with previous declaration %q+#D", olddecl);
1355 else if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) == FUNCTION_DECL
1356 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == FUNCTION_DECL
1357 && compparms (TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl))),
1358 TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl))))
1359 && comp_template_parms (DECL_TEMPLATE_PARMS (newdecl),
1360 DECL_TEMPLATE_PARMS (olddecl))
1361 /* Template functions can be disambiguated by
1363 && same_type_p (TREE_TYPE (TREE_TYPE (newdecl)),
1364 TREE_TYPE (TREE_TYPE (olddecl))))
1366 error ("new declaration %q#D", newdecl);
1367 error ("ambiguates old declaration %q+#D", olddecl);
1371 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1373 if (DECL_EXTERN_C_P (newdecl) && DECL_EXTERN_C_P (olddecl))
1375 error ("declaration of C function %q#D conflicts with",
1377 error ("previous declaration %q+#D here", olddecl);
1379 else if (compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1380 TYPE_ARG_TYPES (TREE_TYPE (olddecl))))
1382 error ("new declaration %q#D", newdecl);
1383 error ("ambiguates old declaration %q+#D", olddecl);
1384 return error_mark_node;
1391 error ("conflicting declaration %q#D", newdecl);
1392 error ("%q+D has a previous declaration as %q#D", olddecl, olddecl);
1393 return error_mark_node;
1396 else if (TREE_CODE (newdecl) == FUNCTION_DECL
1397 && ((DECL_TEMPLATE_SPECIALIZATION (olddecl)
1398 && (!DECL_TEMPLATE_INFO (newdecl)
1399 || (DECL_TI_TEMPLATE (newdecl)
1400 != DECL_TI_TEMPLATE (olddecl))))
1401 || (DECL_TEMPLATE_SPECIALIZATION (newdecl)
1402 && (!DECL_TEMPLATE_INFO (olddecl)
1403 || (DECL_TI_TEMPLATE (olddecl)
1404 != DECL_TI_TEMPLATE (newdecl))))))
1405 /* It's OK to have a template specialization and a non-template
1406 with the same type, or to have specializations of two
1407 different templates with the same type. Note that if one is a
1408 specialization, and the other is an instantiation of the same
1409 template, that we do not exit at this point. That situation
1410 can occur if we instantiate a template class, and then
1411 specialize one of its methods. This situation is valid, but
1412 the declarations must be merged in the usual way. */
1414 else if (TREE_CODE (newdecl) == FUNCTION_DECL
1415 && ((DECL_TEMPLATE_INSTANTIATION (olddecl)
1416 && !DECL_USE_TEMPLATE (newdecl))
1417 || (DECL_TEMPLATE_INSTANTIATION (newdecl)
1418 && !DECL_USE_TEMPLATE (olddecl))))
1419 /* One of the declarations is a template instantiation, and the
1420 other is not a template at all. That's OK. */
1422 else if (TREE_CODE (newdecl) == NAMESPACE_DECL)
1424 /* In [namespace.alias] we have:
1426 In a declarative region, a namespace-alias-definition can be
1427 used to redefine a namespace-alias declared in that declarative
1428 region to refer only to the namespace to which it already
1431 Therefore, if we encounter a second alias directive for the same
1432 alias, we can just ignore the second directive. */
1433 if (DECL_NAMESPACE_ALIAS (newdecl)
1434 && (DECL_NAMESPACE_ALIAS (newdecl)
1435 == DECL_NAMESPACE_ALIAS (olddecl)))
1437 /* [namespace.alias]
1439 A namespace-name or namespace-alias shall not be declared as
1440 the name of any other entity in the same declarative region.
1441 A namespace-name defined at global scope shall not be
1442 declared as the name of any other entity in any global scope
1444 error ("declaration of namespace %qD conflicts with", newdecl);
1445 error ("previous declaration of namespace %q+D here", olddecl);
1446 return error_mark_node;
1450 const char *errmsg = redeclaration_error_message (newdecl, olddecl);
1453 error (errmsg, newdecl);
1454 if (DECL_NAME (olddecl) != NULL_TREE)
1455 error ((DECL_INITIAL (olddecl) && namespace_bindings_p ())
1456 ? "%q+#D previously defined here"
1457 : "%q+#D previously declared here", olddecl);
1458 return error_mark_node;
1460 else if (TREE_CODE (olddecl) == FUNCTION_DECL
1461 && DECL_INITIAL (olddecl) != NULL_TREE
1462 && TYPE_ARG_TYPES (TREE_TYPE (olddecl)) == NULL_TREE
1463 && TYPE_ARG_TYPES (TREE_TYPE (newdecl)) != NULL_TREE)
1465 /* Prototype decl follows defn w/o prototype. */
1466 warning (0, "prototype for %q+#D", newdecl);
1467 warning (0, "%Jfollows non-prototype definition here", olddecl);
1469 else if ((TREE_CODE (olddecl) == FUNCTION_DECL
1470 || TREE_CODE (olddecl) == VAR_DECL)
1471 && DECL_LANGUAGE (newdecl) != DECL_LANGUAGE (olddecl))
1474 If two declarations of the same function or object
1475 specify different linkage-specifications ..., the program
1476 is ill-formed.... Except for functions with C++ linkage,
1477 a function declaration without a linkage specification
1478 shall not precede the first linkage specification for
1479 that function. A function can be declared without a
1480 linkage specification after an explicit linkage
1481 specification has been seen; the linkage explicitly
1482 specified in the earlier declaration is not affected by
1483 such a function declaration.
1485 DR 563 raises the question why the restrictions on
1486 functions should not also apply to objects. Older
1487 versions of G++ silently ignore the linkage-specification
1495 which is clearly wrong. Therefore, we now treat objects
1497 if (current_lang_depth () == 0)
1499 /* There is no explicit linkage-specification, so we use
1500 the linkage from the previous declaration. */
1501 if (!DECL_LANG_SPECIFIC (newdecl))
1502 retrofit_lang_decl (newdecl);
1503 SET_DECL_LANGUAGE (newdecl, DECL_LANGUAGE (olddecl));
1507 error ("previous declaration of %q+#D with %qL linkage",
1508 olddecl, DECL_LANGUAGE (olddecl));
1509 error ("conflicts with new declaration with %qL linkage",
1510 DECL_LANGUAGE (newdecl));
1514 if (DECL_LANG_SPECIFIC (olddecl) && DECL_USE_TEMPLATE (olddecl))
1516 else if (TREE_CODE (olddecl) == FUNCTION_DECL)
1518 tree t1 = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1519 tree t2 = TYPE_ARG_TYPES (TREE_TYPE (newdecl));
1522 if (TREE_CODE (TREE_TYPE (newdecl)) == METHOD_TYPE)
1523 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2);
1525 for (; t1 && t1 != void_list_node;
1526 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2), i++)
1527 if (TREE_PURPOSE (t1) && TREE_PURPOSE (t2))
1529 if (1 == simple_cst_equal (TREE_PURPOSE (t1),
1532 pedwarn ("default argument given for parameter %d of %q#D",
1534 pedwarn ("after previous specification in %q+#D", olddecl);
1538 error ("default argument given for parameter %d of %q#D",
1540 error ("after previous specification in %q+#D",
1545 if (DECL_DECLARED_INLINE_P (newdecl)
1546 && ! DECL_DECLARED_INLINE_P (olddecl)
1547 && TREE_ADDRESSABLE (olddecl) && warn_inline)
1549 warning (0, "%q#D was used before it was declared inline", newdecl);
1550 warning (0, "%Jprevious non-inline declaration here", olddecl);
1555 /* Do not merge an implicit typedef with an explicit one. In:
1559 typedef class A A __attribute__ ((foo));
1561 the attribute should apply only to the typedef. */
1562 if (TREE_CODE (olddecl) == TYPE_DECL
1563 && (DECL_IMPLICIT_TYPEDEF_P (olddecl)
1564 || DECL_IMPLICIT_TYPEDEF_P (newdecl)))
1567 /* If new decl is `static' and an `extern' was seen previously,
1569 warn_extern_redeclared_static (newdecl, olddecl);
1571 /* We have committed to returning 1 at this point. */
1572 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1574 /* Now that functions must hold information normally held
1575 by field decls, there is extra work to do so that
1576 declaration information does not get destroyed during
1578 if (DECL_VINDEX (olddecl))
1579 DECL_VINDEX (newdecl) = DECL_VINDEX (olddecl);
1580 if (DECL_CONTEXT (olddecl))
1581 DECL_CONTEXT (newdecl) = DECL_CONTEXT (olddecl);
1582 DECL_STATIC_CONSTRUCTOR (newdecl) |= DECL_STATIC_CONSTRUCTOR (olddecl);
1583 DECL_STATIC_DESTRUCTOR (newdecl) |= DECL_STATIC_DESTRUCTOR (olddecl);
1584 DECL_PURE_VIRTUAL_P (newdecl) |= DECL_PURE_VIRTUAL_P (olddecl);
1585 DECL_VIRTUAL_P (newdecl) |= DECL_VIRTUAL_P (olddecl);
1586 DECL_INVALID_OVERRIDER_P (newdecl) |= DECL_INVALID_OVERRIDER_P (olddecl);
1587 DECL_THIS_STATIC (newdecl) |= DECL_THIS_STATIC (olddecl);
1588 if (DECL_OVERLOADED_OPERATOR_P (olddecl) != ERROR_MARK)
1589 SET_OVERLOADED_OPERATOR_CODE
1590 (newdecl, DECL_OVERLOADED_OPERATOR_P (olddecl));
1591 new_defines_function = DECL_INITIAL (newdecl) != NULL_TREE;
1593 /* Optionally warn about more than one declaration for the same
1594 name, but don't warn about a function declaration followed by a
1596 if (warn_redundant_decls && ! DECL_ARTIFICIAL (olddecl)
1597 && !(new_defines_function && DECL_INITIAL (olddecl) == NULL_TREE)
1598 /* Don't warn about extern decl followed by definition. */
1599 && !(DECL_EXTERNAL (olddecl) && ! DECL_EXTERNAL (newdecl))
1600 /* Don't warn about friends, let add_friend take care of it. */
1601 && ! (newdecl_is_friend || DECL_FRIEND_P (olddecl)))
1603 warning (OPT_Wredundant_decls, "redundant redeclaration of %qD in same scope", newdecl);
1604 warning (OPT_Wredundant_decls, "previous declaration of %q+D", olddecl);
1608 /* Deal with C++: must preserve virtual function table size. */
1609 if (TREE_CODE (olddecl) == TYPE_DECL)
1611 tree newtype = TREE_TYPE (newdecl);
1612 tree oldtype = TREE_TYPE (olddecl);
1614 if (newtype != error_mark_node && oldtype != error_mark_node
1615 && TYPE_LANG_SPECIFIC (newtype) && TYPE_LANG_SPECIFIC (oldtype))
1616 CLASSTYPE_FRIEND_CLASSES (newtype)
1617 = CLASSTYPE_FRIEND_CLASSES (oldtype);
1619 DECL_ORIGINAL_TYPE (newdecl) = DECL_ORIGINAL_TYPE (olddecl);
1622 /* Copy all the DECL_... slots specified in the new decl
1623 except for any that we copy here from the old type. */
1624 DECL_ATTRIBUTES (newdecl)
1625 = (*targetm.merge_decl_attributes) (olddecl, newdecl);
1627 if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1631 old_result = DECL_TEMPLATE_RESULT (olddecl);
1632 new_result = DECL_TEMPLATE_RESULT (newdecl);
1633 TREE_TYPE (olddecl) = TREE_TYPE (old_result);
1634 DECL_TEMPLATE_SPECIALIZATIONS (olddecl)
1635 = chainon (DECL_TEMPLATE_SPECIALIZATIONS (olddecl),
1636 DECL_TEMPLATE_SPECIALIZATIONS (newdecl));
1638 if (DECL_FUNCTION_TEMPLATE_P (newdecl))
1640 DECL_INLINE (old_result)
1641 |= DECL_INLINE (new_result);
1642 DECL_DECLARED_INLINE_P (old_result)
1643 |= DECL_DECLARED_INLINE_P (new_result);
1644 check_redeclaration_exception_specification (newdecl, olddecl);
1647 /* If the new declaration is a definition, update the file and
1648 line information on the declaration, and also make
1649 the old declaration the same definition. */
1650 if (DECL_INITIAL (old_result) == NULL_TREE
1651 && DECL_INITIAL (new_result) != NULL_TREE)
1653 DECL_SOURCE_LOCATION (olddecl)
1654 = DECL_SOURCE_LOCATION (old_result)
1655 = DECL_SOURCE_LOCATION (newdecl);
1656 DECL_INITIAL (old_result) = DECL_INITIAL (new_result);
1657 if (DECL_FUNCTION_TEMPLATE_P (newdecl))
1658 DECL_ARGUMENTS (old_result)
1659 = DECL_ARGUMENTS (new_result);
1667 /* Automatically handles default parameters. */
1668 tree oldtype = TREE_TYPE (olddecl);
1671 /* Merge the data types specified in the two decls. */
1672 newtype = merge_types (TREE_TYPE (newdecl), TREE_TYPE (olddecl));
1674 /* If merge_types produces a non-typedef type, just use the old type. */
1675 if (TREE_CODE (newdecl) == TYPE_DECL
1676 && newtype == DECL_ORIGINAL_TYPE (newdecl))
1679 if (TREE_CODE (newdecl) == VAR_DECL)
1681 DECL_THIS_EXTERN (newdecl) |= DECL_THIS_EXTERN (olddecl);
1682 DECL_INITIALIZED_P (newdecl) |= DECL_INITIALIZED_P (olddecl);
1683 DECL_NONTRIVIALLY_INITIALIZED_P (newdecl)
1684 |= DECL_NONTRIVIALLY_INITIALIZED_P (olddecl);
1685 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (newdecl)
1686 |= DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (olddecl);
1688 /* Merge the threadprivate attribute from OLDDECL into NEWDECL. */
1689 if (DECL_LANG_SPECIFIC (olddecl)
1690 && CP_DECL_THREADPRIVATE_P (olddecl))
1692 /* Allocate a LANG_SPECIFIC structure for NEWDECL, if needed. */
1693 if (!DECL_LANG_SPECIFIC (newdecl))
1694 retrofit_lang_decl (newdecl);
1696 DECL_TLS_MODEL (newdecl) = DECL_TLS_MODEL (olddecl);
1697 CP_DECL_THREADPRIVATE_P (newdecl) = 1;
1701 /* Do this after calling `merge_types' so that default
1702 parameters don't confuse us. */
1703 else if (TREE_CODE (newdecl) == FUNCTION_DECL)
1704 check_redeclaration_exception_specification (newdecl, olddecl);
1705 TREE_TYPE (newdecl) = TREE_TYPE (olddecl) = newtype;
1707 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1708 check_default_args (newdecl);
1710 /* Lay the type out, unless already done. */
1711 if (! same_type_p (newtype, oldtype)
1712 && TREE_TYPE (newdecl) != error_mark_node
1713 && !(processing_template_decl && uses_template_parms (newdecl)))
1714 layout_type (TREE_TYPE (newdecl));
1716 if ((TREE_CODE (newdecl) == VAR_DECL
1717 || TREE_CODE (newdecl) == PARM_DECL
1718 || TREE_CODE (newdecl) == RESULT_DECL
1719 || TREE_CODE (newdecl) == FIELD_DECL
1720 || TREE_CODE (newdecl) == TYPE_DECL)
1721 && !(processing_template_decl && uses_template_parms (newdecl)))
1722 layout_decl (newdecl, 0);
1724 /* Merge the type qualifiers. */
1725 if (TREE_READONLY (newdecl))
1726 TREE_READONLY (olddecl) = 1;
1727 if (TREE_THIS_VOLATILE (newdecl))
1728 TREE_THIS_VOLATILE (olddecl) = 1;
1729 if (TREE_NOTHROW (newdecl))
1730 TREE_NOTHROW (olddecl) = 1;
1732 /* Merge deprecatedness. */
1733 if (TREE_DEPRECATED (newdecl))
1734 TREE_DEPRECATED (olddecl) = 1;
1736 /* Merge the initialization information. */
1737 if (DECL_INITIAL (newdecl) == NULL_TREE
1738 && DECL_INITIAL (olddecl) != NULL_TREE)
1740 DECL_INITIAL (newdecl) = DECL_INITIAL (olddecl);
1741 DECL_SOURCE_LOCATION (newdecl) = DECL_SOURCE_LOCATION (olddecl);
1742 if (CAN_HAVE_FULL_LANG_DECL_P (newdecl)
1743 && DECL_LANG_SPECIFIC (newdecl)
1744 && DECL_LANG_SPECIFIC (olddecl))
1746 DECL_SAVED_TREE (newdecl) = DECL_SAVED_TREE (olddecl);
1747 DECL_STRUCT_FUNCTION (newdecl) = DECL_STRUCT_FUNCTION (olddecl);
1751 /* Merge the section attribute.
1752 We want to issue an error if the sections conflict but that must be
1753 done later in decl_attributes since we are called before attributes
1755 if (DECL_SECTION_NAME (newdecl) == NULL_TREE)
1756 DECL_SECTION_NAME (newdecl) = DECL_SECTION_NAME (olddecl);
1758 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1760 DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (newdecl)
1761 |= DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (olddecl);
1762 DECL_NO_LIMIT_STACK (newdecl) |= DECL_NO_LIMIT_STACK (olddecl);
1763 TREE_THIS_VOLATILE (newdecl) |= TREE_THIS_VOLATILE (olddecl);
1764 TREE_READONLY (newdecl) |= TREE_READONLY (olddecl);
1765 TREE_NOTHROW (newdecl) |= TREE_NOTHROW (olddecl);
1766 DECL_IS_MALLOC (newdecl) |= DECL_IS_MALLOC (olddecl);
1767 DECL_IS_PURE (newdecl) |= DECL_IS_PURE (olddecl);
1768 /* Keep the old RTL. */
1769 COPY_DECL_RTL (olddecl, newdecl);
1771 else if (TREE_CODE (newdecl) == VAR_DECL
1772 && (DECL_SIZE (olddecl) || !DECL_SIZE (newdecl)))
1774 /* Keep the old RTL. We cannot keep the old RTL if the old
1775 declaration was for an incomplete object and the new
1776 declaration is not since many attributes of the RTL will
1778 COPY_DECL_RTL (olddecl, newdecl);
1781 /* If cannot merge, then use the new type and qualifiers,
1782 and don't preserve the old rtl. */
1785 /* Clean out any memory we had of the old declaration. */
1786 tree oldstatic = value_member (olddecl, static_aggregates);
1788 TREE_VALUE (oldstatic) = error_mark_node;
1790 TREE_TYPE (olddecl) = TREE_TYPE (newdecl);
1791 TREE_READONLY (olddecl) = TREE_READONLY (newdecl);
1792 TREE_THIS_VOLATILE (olddecl) = TREE_THIS_VOLATILE (newdecl);
1793 TREE_SIDE_EFFECTS (olddecl) = TREE_SIDE_EFFECTS (newdecl);
1796 /* Merge the storage class information. */
1797 merge_weak (newdecl, olddecl);
1799 DECL_ONE_ONLY (newdecl) |= DECL_ONE_ONLY (olddecl);
1800 DECL_DEFER_OUTPUT (newdecl) |= DECL_DEFER_OUTPUT (olddecl);
1801 TREE_PUBLIC (newdecl) = TREE_PUBLIC (olddecl);
1802 TREE_STATIC (olddecl) = TREE_STATIC (newdecl) |= TREE_STATIC (olddecl);
1803 if (! DECL_EXTERNAL (olddecl))
1804 DECL_EXTERNAL (newdecl) = 0;
1806 new_template = NULL_TREE;
1807 if (DECL_LANG_SPECIFIC (newdecl) && DECL_LANG_SPECIFIC (olddecl))
1809 DECL_INTERFACE_KNOWN (newdecl) |= DECL_INTERFACE_KNOWN (olddecl);
1810 DECL_NOT_REALLY_EXTERN (newdecl) |= DECL_NOT_REALLY_EXTERN (olddecl);
1811 DECL_COMDAT (newdecl) |= DECL_COMDAT (olddecl);
1812 DECL_TEMPLATE_INSTANTIATED (newdecl)
1813 |= DECL_TEMPLATE_INSTANTIATED (olddecl);
1815 /* If the OLDDECL is an instantiation and/or specialization,
1816 then the NEWDECL must be too. But, it may not yet be marked
1817 as such if the caller has created NEWDECL, but has not yet
1818 figured out that it is a redeclaration. */
1819 if (!DECL_USE_TEMPLATE (newdecl))
1820 DECL_USE_TEMPLATE (newdecl) = DECL_USE_TEMPLATE (olddecl);
1822 /* Don't really know how much of the language-specific
1823 values we should copy from old to new. */
1824 DECL_IN_AGGR_P (newdecl) = DECL_IN_AGGR_P (olddecl);
1825 DECL_LANG_SPECIFIC (newdecl)->decl_flags.u2 =
1826 DECL_LANG_SPECIFIC (olddecl)->decl_flags.u2;
1827 DECL_NONCONVERTING_P (newdecl) = DECL_NONCONVERTING_P (olddecl);
1828 DECL_REPO_AVAILABLE_P (newdecl) = DECL_REPO_AVAILABLE_P (olddecl);
1829 if (DECL_TEMPLATE_INFO (newdecl))
1830 new_template = DECL_TI_TEMPLATE (newdecl);
1831 DECL_TEMPLATE_INFO (newdecl) = DECL_TEMPLATE_INFO (olddecl);
1832 DECL_INITIALIZED_IN_CLASS_P (newdecl)
1833 |= DECL_INITIALIZED_IN_CLASS_P (olddecl);
1834 olddecl_friend = DECL_FRIEND_P (olddecl);
1835 hidden_friend = (DECL_ANTICIPATED (olddecl)
1836 && DECL_HIDDEN_FRIEND_P (olddecl)
1837 && newdecl_is_friend);
1839 /* Only functions have DECL_BEFRIENDING_CLASSES. */
1840 if (TREE_CODE (newdecl) == FUNCTION_DECL
1841 || DECL_FUNCTION_TEMPLATE_P (newdecl))
1843 DECL_BEFRIENDING_CLASSES (newdecl)
1844 = chainon (DECL_BEFRIENDING_CLASSES (newdecl),
1845 DECL_BEFRIENDING_CLASSES (olddecl));
1846 /* DECL_THUNKS is only valid for virtual functions,
1847 otherwise it is a DECL_FRIEND_CONTEXT. */
1848 if (DECL_VIRTUAL_P (newdecl))
1849 DECL_THUNKS (newdecl) = DECL_THUNKS (olddecl);
1853 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1855 if (DECL_TEMPLATE_INSTANTIATION (olddecl)
1856 && !DECL_TEMPLATE_INSTANTIATION (newdecl))
1858 /* If newdecl is not a specialization, then it is not a
1859 template-related function at all. And that means that we
1860 should have exited above, returning 0. */
1861 gcc_assert (DECL_TEMPLATE_SPECIALIZATION (newdecl));
1863 if (TREE_USED (olddecl))
1864 /* From [temp.expl.spec]:
1866 If a template, a member template or the member of a class
1867 template is explicitly specialized then that
1868 specialization shall be declared before the first use of
1869 that specialization that would cause an implicit
1870 instantiation to take place, in every translation unit in
1871 which such a use occurs. */
1872 error ("explicit specialization of %qD after first use",
1875 SET_DECL_TEMPLATE_SPECIALIZATION (olddecl);
1877 /* Don't propagate visibility from the template to the
1878 specialization here. We'll do that in determine_visibility if
1880 DECL_VISIBILITY_SPECIFIED (olddecl) = 0;
1882 /* [temp.expl.spec/14] We don't inline explicit specialization
1883 just because the primary template says so. */
1887 if (DECL_PENDING_INLINE_INFO (newdecl) == 0)
1888 DECL_PENDING_INLINE_INFO (newdecl) = DECL_PENDING_INLINE_INFO (olddecl);
1890 DECL_DECLARED_INLINE_P (newdecl) |= DECL_DECLARED_INLINE_P (olddecl);
1892 /* If either decl says `inline', this fn is inline, unless
1893 its definition was passed already. */
1894 if (DECL_INLINE (newdecl) && DECL_INITIAL (olddecl) == NULL_TREE)
1895 DECL_INLINE (olddecl) = 1;
1896 DECL_INLINE (newdecl) = DECL_INLINE (olddecl);
1898 DECL_UNINLINABLE (newdecl) = DECL_UNINLINABLE (olddecl)
1899 = (DECL_UNINLINABLE (newdecl) || DECL_UNINLINABLE (olddecl));
1902 /* Preserve abstractness on cloned [cd]tors. */
1903 DECL_ABSTRACT (newdecl) = DECL_ABSTRACT (olddecl);
1907 SET_DECL_LANGUAGE (olddecl, DECL_LANGUAGE (newdecl));
1908 COPY_DECL_ASSEMBLER_NAME (newdecl, olddecl);
1909 COPY_DECL_RTL (newdecl, olddecl);
1911 if (! types_match || new_defines_function)
1913 /* These need to be copied so that the names are available.
1914 Note that if the types do match, we'll preserve inline
1915 info and other bits, but if not, we won't. */
1916 DECL_ARGUMENTS (olddecl) = DECL_ARGUMENTS (newdecl);
1917 DECL_RESULT (olddecl) = DECL_RESULT (newdecl);
1919 if (new_defines_function)
1920 /* If defining a function declared with other language
1921 linkage, use the previously declared language linkage. */
1922 SET_DECL_LANGUAGE (newdecl, DECL_LANGUAGE (olddecl));
1923 else if (types_match)
1925 /* If redeclaring a builtin function, and not a definition,
1926 it stays built in. */
1927 if (DECL_BUILT_IN (olddecl))
1929 DECL_BUILT_IN_CLASS (newdecl) = DECL_BUILT_IN_CLASS (olddecl);
1930 DECL_FUNCTION_CODE (newdecl) = DECL_FUNCTION_CODE (olddecl);
1931 /* If we're keeping the built-in definition, keep the rtl,
1932 regardless of declaration matches. */
1933 COPY_DECL_RTL (olddecl, newdecl);
1936 DECL_RESULT (newdecl) = DECL_RESULT (olddecl);
1937 /* Don't clear out the arguments if we're redefining a function. */
1938 if (DECL_ARGUMENTS (olddecl))
1939 DECL_ARGUMENTS (newdecl) = DECL_ARGUMENTS (olddecl);
1942 else if (TREE_CODE (newdecl) == NAMESPACE_DECL)
1943 NAMESPACE_LEVEL (newdecl) = NAMESPACE_LEVEL (olddecl);
1945 /* Now preserve various other info from the definition. */
1946 TREE_ADDRESSABLE (newdecl) = TREE_ADDRESSABLE (olddecl);
1947 TREE_ASM_WRITTEN (newdecl) = TREE_ASM_WRITTEN (olddecl);
1948 DECL_COMMON (newdecl) = DECL_COMMON (olddecl);
1949 COPY_DECL_ASSEMBLER_NAME (olddecl, newdecl);
1951 /* Warn about conflicting visibility specifications. */
1952 if (DECL_VISIBILITY_SPECIFIED (olddecl)
1953 && DECL_VISIBILITY_SPECIFIED (newdecl)
1954 && DECL_VISIBILITY (newdecl) != DECL_VISIBILITY (olddecl))
1956 warning (OPT_Wattributes, "%q+D: visibility attribute ignored "
1957 "because it", newdecl);
1958 warning (OPT_Wattributes, "%Jconflicts with previous "
1959 "declaration here", olddecl);
1961 /* Choose the declaration which specified visibility. */
1962 if (DECL_VISIBILITY_SPECIFIED (olddecl))
1964 DECL_VISIBILITY (newdecl) = DECL_VISIBILITY (olddecl);
1965 DECL_VISIBILITY_SPECIFIED (newdecl) = 1;
1967 /* Init priority used to be merged from newdecl to olddecl by the memcpy,
1968 so keep this behavior. */
1969 if (TREE_CODE (newdecl) == VAR_DECL && DECL_HAS_INIT_PRIORITY_P (newdecl))
1971 SET_DECL_INIT_PRIORITY (olddecl, DECL_INIT_PRIORITY (newdecl));
1972 DECL_HAS_INIT_PRIORITY_P (olddecl) = 1;
1975 /* The DECL_LANG_SPECIFIC information in OLDDECL will be replaced
1976 with that from NEWDECL below. */
1977 if (DECL_LANG_SPECIFIC (olddecl))
1979 gcc_assert (DECL_LANG_SPECIFIC (olddecl)
1980 != DECL_LANG_SPECIFIC (newdecl));
1981 ggc_free (DECL_LANG_SPECIFIC (olddecl));
1984 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1988 function_size = sizeof (struct tree_decl_common);
1990 memcpy ((char *) olddecl + sizeof (struct tree_common),
1991 (char *) newdecl + sizeof (struct tree_common),
1992 function_size - sizeof (struct tree_common));
1994 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
1995 (char *) newdecl + sizeof (struct tree_decl_common),
1996 sizeof (struct tree_function_decl) - sizeof (struct tree_decl_common));
1998 /* If newdecl is a template instantiation, it is possible that
1999 the following sequence of events has occurred:
2001 o A friend function was declared in a class template. The
2002 class template was instantiated.
2004 o The instantiation of the friend declaration was
2005 recorded on the instantiation list, and is newdecl.
2007 o Later, however, instantiate_class_template called pushdecl
2008 on the newdecl to perform name injection. But, pushdecl in
2009 turn called duplicate_decls when it discovered that another
2010 declaration of a global function with the same name already
2013 o Here, in duplicate_decls, we decided to clobber newdecl.
2015 If we're going to do that, we'd better make sure that
2016 olddecl, and not newdecl, is on the list of
2017 instantiations so that if we try to do the instantiation
2018 again we won't get the clobbered declaration. */
2019 reregister_specialization (newdecl,
2025 size_t size = tree_code_size (TREE_CODE (olddecl));
2026 memcpy ((char *) olddecl + sizeof (struct tree_common),
2027 (char *) newdecl + sizeof (struct tree_common),
2028 sizeof (struct tree_decl_common) - sizeof (struct tree_common));
2029 switch (TREE_CODE (olddecl))
2039 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
2040 (char *) newdecl + sizeof (struct tree_decl_common),
2041 size - sizeof (struct tree_decl_common)
2042 + TREE_CODE_LENGTH (TREE_CODE (newdecl)) * sizeof (char *));
2046 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
2047 (char *) newdecl + sizeof (struct tree_decl_common),
2048 sizeof (struct tree_decl_non_common) - sizeof (struct tree_decl_common)
2049 + TREE_CODE_LENGTH (TREE_CODE (newdecl)) * sizeof (char *));
2053 DECL_UID (olddecl) = olddecl_uid;
2055 DECL_FRIEND_P (olddecl) = 1;
2058 DECL_ANTICIPATED (olddecl) = 1;
2059 DECL_HIDDEN_FRIEND_P (olddecl) = 1;
2062 /* NEWDECL contains the merged attribute lists.
2063 Update OLDDECL to be the same. */
2064 DECL_ATTRIBUTES (olddecl) = DECL_ATTRIBUTES (newdecl);
2066 /* If OLDDECL had its DECL_RTL instantiated, re-invoke make_decl_rtl
2067 so that encode_section_info has a chance to look at the new decl
2068 flags and attributes. */
2069 if (DECL_RTL_SET_P (olddecl)
2070 && (TREE_CODE (olddecl) == FUNCTION_DECL
2071 || (TREE_CODE (olddecl) == VAR_DECL
2072 && TREE_STATIC (olddecl))))
2073 make_decl_rtl (olddecl);
2075 /* The NEWDECL will no longer be needed. Because every out-of-class
2076 declaration of a member results in a call to duplicate_decls,
2077 freeing these nodes represents in a significant savings. */
2083 /* Return zero if the declaration NEWDECL is valid
2084 when the declaration OLDDECL (assumed to be for the same name)
2085 has already been seen.
2086 Otherwise return an error message format string with a %s
2087 where the identifier should go. */
2090 redeclaration_error_message (tree newdecl, tree olddecl)
2092 if (TREE_CODE (newdecl) == TYPE_DECL)
2094 /* Because C++ can put things into name space for free,
2095 constructs like "typedef struct foo { ... } foo"
2096 would look like an erroneous redeclaration. */
2097 if (same_type_p (TREE_TYPE (newdecl), TREE_TYPE (olddecl)))
2100 return "redefinition of %q#D";
2102 else if (TREE_CODE (newdecl) == FUNCTION_DECL)
2104 /* If this is a pure function, its olddecl will actually be
2105 the original initialization to `0' (which we force to call
2106 abort()). Don't complain about redefinition in this case. */
2107 if (DECL_LANG_SPECIFIC (olddecl) && DECL_PURE_VIRTUAL_P (olddecl)
2108 && DECL_INITIAL (olddecl) == NULL_TREE)
2111 /* If both functions come from different namespaces, this is not
2112 a redeclaration - this is a conflict with a used function. */
2113 if (DECL_NAMESPACE_SCOPE_P (olddecl)
2114 && DECL_CONTEXT (olddecl) != DECL_CONTEXT (newdecl)
2115 && ! decls_match (olddecl, newdecl))
2116 return "%qD conflicts with used function";
2118 /* We'll complain about linkage mismatches in
2119 warn_extern_redeclared_static. */
2121 /* Defining the same name twice is no good. */
2122 if (DECL_INITIAL (olddecl) != NULL_TREE
2123 && DECL_INITIAL (newdecl) != NULL_TREE)
2125 if (DECL_NAME (olddecl) == NULL_TREE)
2126 return "%q#D not declared in class";
2128 return "redefinition of %q#D";
2132 else if (TREE_CODE (newdecl) == TEMPLATE_DECL)
2136 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
2138 if (COMPLETE_TYPE_P (TREE_TYPE (newdecl))
2139 && COMPLETE_TYPE_P (TREE_TYPE (olddecl)))
2140 return "redefinition of %q#D";
2144 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) != FUNCTION_DECL
2145 || (DECL_TEMPLATE_RESULT (newdecl)
2146 == DECL_TEMPLATE_RESULT (olddecl)))
2149 nt = DECL_TEMPLATE_RESULT (newdecl);
2150 if (DECL_TEMPLATE_INFO (nt))
2151 nt = DECL_TEMPLATE_RESULT (template_for_substitution (nt));
2152 ot = DECL_TEMPLATE_RESULT (olddecl);
2153 if (DECL_TEMPLATE_INFO (ot))
2154 ot = DECL_TEMPLATE_RESULT (template_for_substitution (ot));
2155 if (DECL_INITIAL (nt) && DECL_INITIAL (ot))
2156 return "redefinition of %q#D";
2158 /* Core issue #226 (C++0x):
2160 If a friend function template declaration specifies a
2161 default template-argument, that declaration shall be a
2162 definition and shall be the only declaration of the
2163 function template in the translation unit. */
2165 && TREE_CODE (ot) == FUNCTION_DECL && DECL_FRIEND_P (ot)
2166 && !check_default_tmpl_args (nt, DECL_TEMPLATE_PARMS (newdecl),
2167 /*is_primary=*/1, /*is_partial=*/0,
2168 /*is_friend_decl=*/2))
2169 return "redeclaration of friend %q#D may not have default template arguments";
2173 else if (TREE_CODE (newdecl) == VAR_DECL
2174 && DECL_THREAD_LOCAL_P (newdecl) != DECL_THREAD_LOCAL_P (olddecl)
2175 && (! DECL_LANG_SPECIFIC (olddecl)
2176 || ! CP_DECL_THREADPRIVATE_P (olddecl)
2177 || DECL_THREAD_LOCAL_P (newdecl)))
2179 /* Only variables can be thread-local, and all declarations must
2180 agree on this property. */
2181 if (DECL_THREAD_LOCAL_P (newdecl))
2182 return "thread-local declaration of %q#D follows "
2183 "non-thread-local declaration";
2185 return "non-thread-local declaration of %q#D follows "
2186 "thread-local declaration";
2188 else if (toplevel_bindings_p () || DECL_NAMESPACE_SCOPE_P (newdecl))
2190 /* Objects declared at top level: */
2191 /* If at least one is a reference, it's ok. */
2192 if (DECL_EXTERNAL (newdecl) || DECL_EXTERNAL (olddecl))
2194 /* Reject two definitions. */
2195 return "redefinition of %q#D";
2199 /* Objects declared with block scope: */
2200 /* Reject two definitions, and reject a definition
2201 together with an external reference. */
2202 if (!(DECL_EXTERNAL (newdecl) && DECL_EXTERNAL (olddecl)))
2203 return "redeclaration of %q#D";
2208 /* Hash and equality functions for the named_label table. */
2211 named_label_entry_hash (const void *data)
2213 const struct named_label_entry *ent = (const struct named_label_entry *) data;
2214 return DECL_UID (ent->label_decl);
2218 named_label_entry_eq (const void *a, const void *b)
2220 const struct named_label_entry *ent_a = (const struct named_label_entry *) a;
2221 const struct named_label_entry *ent_b = (const struct named_label_entry *) b;
2222 return ent_a->label_decl == ent_b->label_decl;
2225 /* Create a new label, named ID. */
2228 make_label_decl (tree id, int local_p)
2230 struct named_label_entry *ent;
2234 decl = build_decl (LABEL_DECL, id, void_type_node);
2236 DECL_CONTEXT (decl) = current_function_decl;
2237 DECL_MODE (decl) = VOIDmode;
2238 C_DECLARED_LABEL_FLAG (decl) = local_p;
2240 /* Say where one reference is to the label, for the sake of the
2241 error if it is not defined. */
2242 DECL_SOURCE_LOCATION (decl) = input_location;
2244 /* Record the fact that this identifier is bound to this label. */
2245 SET_IDENTIFIER_LABEL_VALUE (id, decl);
2247 /* Create the label htab for the function on demand. */
2249 named_labels = htab_create_ggc (13, named_label_entry_hash,
2250 named_label_entry_eq, NULL);
2252 /* Record this label on the list of labels used in this function.
2253 We do this before calling make_label_decl so that we get the
2254 IDENTIFIER_LABEL_VALUE before the new label is declared. */
2255 ent = GGC_CNEW (struct named_label_entry);
2256 ent->label_decl = decl;
2258 slot = htab_find_slot (named_labels, ent, INSERT);
2259 gcc_assert (*slot == NULL);
2265 /* Look for a label named ID in the current function. If one cannot
2266 be found, create one. (We keep track of used, but undefined,
2267 labels, and complain about them at the end of a function.) */
2270 lookup_label (tree id)
2274 timevar_push (TV_NAME_LOOKUP);
2275 /* You can't use labels at global scope. */
2276 if (current_function_decl == NULL_TREE)
2278 error ("label %qE referenced outside of any function", id);
2279 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, NULL_TREE);
2282 /* See if we've already got this label. */
2283 decl = IDENTIFIER_LABEL_VALUE (id);
2284 if (decl != NULL_TREE && DECL_CONTEXT (decl) == current_function_decl)
2285 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2287 decl = make_label_decl (id, /*local_p=*/0);
2288 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2291 /* Declare a local label named ID. */
2294 declare_local_label (tree id)
2298 /* Add a new entry to the SHADOWED_LABELS list so that when we leave
2299 this scope we can restore the old value of IDENTIFIER_TYPE_VALUE. */
2300 shadow = tree_cons (IDENTIFIER_LABEL_VALUE (id), NULL_TREE,
2301 current_binding_level->shadowed_labels);
2302 current_binding_level->shadowed_labels = shadow;
2304 decl = make_label_decl (id, /*local_p=*/1);
2305 TREE_VALUE (shadow) = decl;
2310 /* Returns nonzero if it is ill-formed to jump past the declaration of
2311 DECL. Returns 2 if it's also a real problem. */
2314 decl_jump_unsafe (tree decl)
2316 if (TREE_CODE (decl) != VAR_DECL || TREE_STATIC (decl)
2317 || TREE_TYPE (decl) == error_mark_node)
2320 if (TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl))
2321 || DECL_NONTRIVIALLY_INITIALIZED_P (decl))
2324 if (pod_type_p (TREE_TYPE (decl)))
2327 /* The POD stuff is just pedantry; why should it matter if the class
2328 contains a field of pointer to member type? */
2332 /* A subroutine of check_previous_goto_1 to identify a branch to the user. */
2335 identify_goto (tree decl, const location_t *locus)
2338 pedwarn ("jump to label %qD", decl);
2340 pedwarn ("jump to case label");
2342 pedwarn ("%H from here", locus);
2345 /* Check that a single previously seen jump to a newly defined label
2346 is OK. DECL is the LABEL_DECL or 0; LEVEL is the binding_level for
2347 the jump context; NAMES are the names in scope in LEVEL at the jump
2348 context; LOCUS is the source position of the jump or 0. Returns
2349 true if all is well. */
2352 check_previous_goto_1 (tree decl, struct cp_binding_level* level, tree names,
2353 bool exited_omp, const location_t *locus)
2355 struct cp_binding_level *b;
2356 bool identified = false, saw_eh = false, saw_omp = false;
2360 identify_goto (decl, locus);
2361 error (" exits OpenMP structured block");
2362 identified = saw_omp = true;
2365 for (b = current_binding_level; b ; b = b->level_chain)
2367 tree new_decls, old_decls = (b == level ? names : NULL_TREE);
2369 for (new_decls = b->names; new_decls != old_decls;
2370 new_decls = TREE_CHAIN (new_decls))
2372 int problem = decl_jump_unsafe (new_decls);
2378 identify_goto (decl, locus);
2382 error (" crosses initialization of %q+#D", new_decls);
2384 pedwarn (" enters scope of non-POD %q+#D", new_decls);
2389 if ((b->kind == sk_try || b->kind == sk_catch) && !saw_eh)
2393 identify_goto (decl, locus);
2396 if (b->kind == sk_try)
2397 error (" enters try block");
2399 error (" enters catch block");
2402 if (b->kind == sk_omp && !saw_omp)
2406 identify_goto (decl, locus);
2409 error (" enters OpenMP structured block");
2418 check_previous_goto (tree decl, struct named_label_use_entry *use)
2420 check_previous_goto_1 (decl, use->binding_level,
2421 use->names_in_scope, use->in_omp_scope,
2422 &use->o_goto_locus);
2426 check_switch_goto (struct cp_binding_level* level)
2428 return check_previous_goto_1 (NULL_TREE, level, level->names, false, NULL);
2431 /* Check that a new jump to a label DECL is OK. Called by
2432 finish_goto_stmt. */
2435 check_goto (tree decl)
2437 struct named_label_entry *ent, dummy;
2438 bool saw_catch = false, identified = false;
2441 /* We can't know where a computed goto is jumping.
2442 So we assume that it's OK. */
2443 if (TREE_CODE (decl) != LABEL_DECL)
2446 /* We didn't record any information about this label when we created it,
2447 and there's not much point since it's trivial to analyze as a return. */
2448 if (decl == cdtor_label)
2451 dummy.label_decl = decl;
2452 ent = (struct named_label_entry *) htab_find (named_labels, &dummy);
2453 gcc_assert (ent != NULL);
2455 /* If the label hasn't been defined yet, defer checking. */
2456 if (! DECL_INITIAL (decl))
2458 struct named_label_use_entry *new_use;
2460 /* Don't bother creating another use if the last goto had the
2461 same data, and will therefore create the same set of errors. */
2463 && ent->uses->names_in_scope == current_binding_level->names)
2466 new_use = GGC_NEW (struct named_label_use_entry);
2467 new_use->binding_level = current_binding_level;
2468 new_use->names_in_scope = current_binding_level->names;
2469 new_use->o_goto_locus = input_location;
2470 new_use->in_omp_scope = false;
2472 new_use->next = ent->uses;
2473 ent->uses = new_use;
2477 if (ent->in_try_scope || ent->in_catch_scope
2478 || ent->in_omp_scope || ent->bad_decls)
2480 pedwarn ("jump to label %q+D", decl);
2481 pedwarn (" from here");
2485 for (bad = ent->bad_decls; bad; bad = TREE_CHAIN (bad))
2487 tree b = TREE_VALUE (bad);
2488 int u = decl_jump_unsafe (b);
2490 if (u > 1 && DECL_ARTIFICIAL (b))
2492 /* Can't skip init of __exception_info. */
2493 error ("%J enters catch block", b);
2497 error (" skips initialization of %q+#D", b);
2499 pedwarn (" enters scope of non-POD %q+#D", b);
2502 if (ent->in_try_scope)
2503 error (" enters try block");
2504 else if (ent->in_catch_scope && !saw_catch)
2505 error (" enters catch block");
2507 if (ent->in_omp_scope)
2508 error (" enters OpenMP structured block");
2509 else if (flag_openmp)
2511 struct cp_binding_level *b;
2512 for (b = current_binding_level; b ; b = b->level_chain)
2514 if (b == ent->binding_level)
2516 if (b->kind == sk_omp)
2520 pedwarn ("jump to label %q+D", decl);
2521 pedwarn (" from here");
2524 error (" exits OpenMP structured block");
2531 /* Check that a return is ok wrt OpenMP structured blocks.
2532 Called by finish_return_stmt. Returns true if all is well. */
2535 check_omp_return (void)
2537 struct cp_binding_level *b;
2538 for (b = current_binding_level; b ; b = b->level_chain)
2539 if (b->kind == sk_omp)
2541 error ("invalid exit from OpenMP structured block");
2547 /* Define a label, specifying the location in the source file.
2548 Return the LABEL_DECL node for the label. */
2551 define_label (location_t location, tree name)
2553 struct named_label_entry *ent, dummy;
2554 struct cp_binding_level *p;
2557 timevar_push (TV_NAME_LOOKUP);
2559 decl = lookup_label (name);
2561 dummy.label_decl = decl;
2562 ent = (struct named_label_entry *) htab_find (named_labels, &dummy);
2563 gcc_assert (ent != NULL);
2565 /* After labels, make any new cleanups in the function go into their
2566 own new (temporary) binding contour. */
2567 for (p = current_binding_level;
2568 p->kind != sk_function_parms;
2570 p->more_cleanups_ok = 0;
2572 if (name == get_identifier ("wchar_t"))
2573 pedwarn ("label named wchar_t");
2575 if (DECL_INITIAL (decl) != NULL_TREE)
2577 error ("duplicate label %qD", decl);
2578 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
2582 struct named_label_use_entry *use;
2584 /* Mark label as having been defined. */
2585 DECL_INITIAL (decl) = error_mark_node;
2586 /* Say where in the source. */
2587 DECL_SOURCE_LOCATION (decl) = location;
2589 ent->binding_level = current_binding_level;
2590 ent->names_in_scope = current_binding_level->names;
2592 for (use = ent->uses; use ; use = use->next)
2593 check_previous_goto (decl, use);
2597 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2602 struct cp_binding_level *level;
2603 struct cp_switch *next;
2604 /* The SWITCH_STMT being built. */
2606 /* A splay-tree mapping the low element of a case range to the high
2607 element, or NULL_TREE if there is no high element. Used to
2608 determine whether or not a new case label duplicates an old case
2609 label. We need a tree, rather than simply a hash table, because
2610 of the GNU case range extension. */
2614 /* A stack of the currently active switch statements. The innermost
2615 switch statement is on the top of the stack. There is no need to
2616 mark the stack for garbage collection because it is only active
2617 during the processing of the body of a function, and we never
2618 collect at that point. */
2620 static struct cp_switch *switch_stack;
2622 /* Called right after a switch-statement condition is parsed.
2623 SWITCH_STMT is the switch statement being parsed. */
2626 push_switch (tree switch_stmt)
2628 struct cp_switch *p = XNEW (struct cp_switch);
2629 p->level = current_binding_level;
2630 p->next = switch_stack;
2631 p->switch_stmt = switch_stmt;
2632 p->cases = splay_tree_new (case_compare, NULL, NULL);
2639 struct cp_switch *cs = switch_stack;
2640 location_t switch_location;
2642 /* Emit warnings as needed. */
2643 if (EXPR_HAS_LOCATION (cs->switch_stmt))
2644 switch_location = EXPR_LOCATION (cs->switch_stmt);
2646 switch_location = input_location;
2647 if (!processing_template_decl)
2648 c_do_switch_warnings (cs->cases, switch_location,
2649 SWITCH_STMT_TYPE (cs->switch_stmt),
2650 SWITCH_STMT_COND (cs->switch_stmt));
2652 splay_tree_delete (cs->cases);
2653 switch_stack = switch_stack->next;
2657 /* Note that we've seen a definition of a case label, and complain if this
2658 is a bad place for one. */
2661 finish_case_label (tree low_value, tree high_value)
2664 struct cp_binding_level *p;
2666 if (processing_template_decl)
2670 /* For templates, just add the case label; we'll do semantic
2671 analysis at instantiation-time. */
2672 label = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
2673 return add_stmt (build_case_label (low_value, high_value, label));
2676 /* Find the condition on which this switch statement depends. */
2677 cond = SWITCH_STMT_COND (switch_stack->switch_stmt);
2678 if (cond && TREE_CODE (cond) == TREE_LIST)
2679 cond = TREE_VALUE (cond);
2681 if (!check_switch_goto (switch_stack->level))
2682 return error_mark_node;
2684 r = c_add_case_label (switch_stack->cases, cond, TREE_TYPE (cond),
2685 low_value, high_value);
2687 /* After labels, make any new cleanups in the function go into their
2688 own new (temporary) binding contour. */
2689 for (p = current_binding_level;
2690 p->kind != sk_function_parms;
2692 p->more_cleanups_ok = 0;
2697 /* Hash a TYPENAME_TYPE. K is really of type `tree'. */
2700 typename_hash (const void* k)
2705 hash = (htab_hash_pointer (TYPE_CONTEXT (t))
2706 ^ htab_hash_pointer (DECL_NAME (TYPE_NAME (t))));
2711 typedef struct typename_info {
2719 /* Compare two TYPENAME_TYPEs. K1 is really of type `tree', K2 is
2720 really of type `typename_info*' */
2723 typename_compare (const void * k1, const void * k2)
2726 const typename_info *t2;
2729 t2 = (const typename_info *) k2;
2731 return (DECL_NAME (TYPE_NAME (t1)) == t2->name
2732 && TYPE_CONTEXT (t1) == t2->scope
2733 && TYPENAME_TYPE_FULLNAME (t1) == t2->template_id
2734 && TYPENAME_IS_ENUM_P (t1) == t2->enum_p
2735 && TYPENAME_IS_CLASS_P (t1) == t2->class_p);
2738 /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
2739 the type of `T', NAME is the IDENTIFIER_NODE for `t'.
2741 Returns the new TYPENAME_TYPE. */
2743 static GTY ((param_is (union tree_node))) htab_t typename_htab;
2746 build_typename_type (tree context, tree name, tree fullname,
2747 enum tag_types tag_type)
2755 if (typename_htab == NULL)
2756 typename_htab = htab_create_ggc (61, &typename_hash,
2757 &typename_compare, NULL);
2759 ti.scope = FROB_CONTEXT (context);
2761 ti.template_id = fullname;
2762 ti.enum_p = tag_type == enum_type;
2763 ti.class_p = (tag_type == class_type
2764 || tag_type == record_type
2765 || tag_type == union_type);
2766 hash = (htab_hash_pointer (ti.scope)
2767 ^ htab_hash_pointer (ti.name));
2769 /* See if we already have this type. */
2770 e = htab_find_slot_with_hash (typename_htab, &ti, hash, INSERT);
2775 /* Build the TYPENAME_TYPE. */
2776 t = make_aggr_type (TYPENAME_TYPE);
2777 TYPE_CONTEXT (t) = ti.scope;
2778 TYPENAME_TYPE_FULLNAME (t) = ti.template_id;
2779 TYPENAME_IS_ENUM_P (t) = ti.enum_p;
2780 TYPENAME_IS_CLASS_P (t) = ti.class_p;
2782 /* Build the corresponding TYPE_DECL. */
2783 d = build_decl (TYPE_DECL, name, t);
2784 TYPE_NAME (TREE_TYPE (d)) = d;
2785 TYPE_STUB_DECL (TREE_TYPE (d)) = d;
2786 DECL_CONTEXT (d) = FROB_CONTEXT (context);
2787 DECL_ARTIFICIAL (d) = 1;
2789 /* Store it in the hash table. */
2792 /* TYPENAME_TYPEs must always be compared structurally, because
2793 they may or may not resolve down to another type depending on
2794 the currently open classes. */
2795 SET_TYPE_STRUCTURAL_EQUALITY (t);
2801 /* Resolve `typename CONTEXT::NAME'. TAG_TYPE indicates the tag
2802 provided to name the type. Returns an appropriate type, unless an
2803 error occurs, in which case error_mark_node is returned. If we
2804 locate a non-artificial TYPE_DECL and TF_KEEP_TYPE_DECL is set, we
2805 return that, rather than the _TYPE it corresponds to, in other
2806 cases we look through the type decl. If TF_ERROR is set, complain
2807 about errors, otherwise be quiet. */
2810 make_typename_type (tree context, tree name, enum tag_types tag_type,
2811 tsubst_flags_t complain)
2817 if (name == error_mark_node
2818 || context == NULL_TREE
2819 || context == error_mark_node)
2820 return error_mark_node;
2824 if (!(TYPE_LANG_SPECIFIC (name)
2825 && (CLASSTYPE_IS_TEMPLATE (name)
2826 || CLASSTYPE_USE_TEMPLATE (name))))
2827 name = TYPE_IDENTIFIER (name);
2829 /* Create a TEMPLATE_ID_EXPR for the type. */
2830 name = build_nt (TEMPLATE_ID_EXPR,
2831 CLASSTYPE_TI_TEMPLATE (name),
2832 CLASSTYPE_TI_ARGS (name));
2834 else if (TREE_CODE (name) == TYPE_DECL)
2835 name = DECL_NAME (name);
2839 if (TREE_CODE (name) == TEMPLATE_ID_EXPR)
2841 name = TREE_OPERAND (name, 0);
2842 if (TREE_CODE (name) == TEMPLATE_DECL)
2843 name = TREE_OPERAND (fullname, 0) = DECL_NAME (name);
2844 else if (TREE_CODE (name) == OVERLOAD)
2846 error ("%qD is not a type", name);
2847 return error_mark_node;
2850 if (TREE_CODE (name) == TEMPLATE_DECL)
2852 error ("%qD used without template parameters", name);
2853 return error_mark_node;
2855 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
2856 gcc_assert (TYPE_P (context));
2858 /* When the CONTEXT is a dependent type, NAME could refer to a
2859 dependent base class of CONTEXT. So we cannot peek inside it,
2860 even if CONTEXT is a currently open scope. */
2861 if (dependent_type_p (context))
2862 return build_typename_type (context, name, fullname, tag_type);
2864 if (!IS_AGGR_TYPE (context))
2866 if (complain & tf_error)
2867 error ("%q#T is not a class", context);
2868 return error_mark_node;
2871 want_template = TREE_CODE (fullname) == TEMPLATE_ID_EXPR;
2873 /* We should only set WANT_TYPE when we're a nested typename type.
2874 Then we can give better diagnostics if we find a non-type. */
2875 t = lookup_field (context, name, 0, /*want_type=*/true);
2878 if (complain & tf_error)
2879 error (want_template ? "no class template named %q#T in %q#T"
2880 : "no type named %q#T in %q#T", name, context);
2881 return error_mark_node;
2884 if (want_template && !DECL_CLASS_TEMPLATE_P (t))
2886 if (complain & tf_error)
2887 error ("%<typename %T::%D%> names %q#T, which is not a class template",
2889 return error_mark_node;
2891 if (!want_template && TREE_CODE (t) != TYPE_DECL)
2893 if (complain & tf_error)
2894 error ("%<typename %T::%D%> names %q#T, which is not a type",
2896 return error_mark_node;
2899 if (complain & tf_error)
2900 perform_or_defer_access_check (TYPE_BINFO (context), t, t);
2903 return lookup_template_class (t, TREE_OPERAND (fullname, 1),
2905 /*entering_scope=*/0,
2906 tf_warning_or_error | tf_user);
2908 if (DECL_ARTIFICIAL (t) || !(complain & tf_keep_type_decl))
2914 /* Resolve `CONTEXT::template NAME'. Returns a TEMPLATE_DECL if the name
2915 can be resolved or an UNBOUND_CLASS_TEMPLATE, unless an error occurs,
2916 in which case error_mark_node is returned.
2918 If PARM_LIST is non-NULL, also make sure that the template parameter
2919 list of TEMPLATE_DECL matches.
2921 If COMPLAIN zero, don't complain about any errors that occur. */
2924 make_unbound_class_template (tree context, tree name, tree parm_list,
2925 tsubst_flags_t complain)
2931 name = TYPE_IDENTIFIER (name);
2932 else if (DECL_P (name))
2933 name = DECL_NAME (name);
2934 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
2936 if (!dependent_type_p (context)
2937 || currently_open_class (context))
2939 tree tmpl = NULL_TREE;
2941 if (IS_AGGR_TYPE (context))
2942 tmpl = lookup_field (context, name, 0, false);
2944 if (!tmpl || !DECL_CLASS_TEMPLATE_P (tmpl))
2946 if (complain & tf_error)
2947 error ("no class template named %q#T in %q#T", name, context);
2948 return error_mark_node;
2952 && !comp_template_parms (DECL_TEMPLATE_PARMS (tmpl), parm_list))
2954 if (complain & tf_error)
2956 error ("template parameters do not match template");
2957 error ("%q+D declared here", tmpl);
2959 return error_mark_node;
2962 if (complain & tf_error)
2963 perform_or_defer_access_check (TYPE_BINFO (context), tmpl, tmpl);
2968 /* Build the UNBOUND_CLASS_TEMPLATE. */
2969 t = make_aggr_type (UNBOUND_CLASS_TEMPLATE);
2970 TYPE_CONTEXT (t) = FROB_CONTEXT (context);
2971 TREE_TYPE (t) = NULL_TREE;
2972 SET_TYPE_STRUCTURAL_EQUALITY (t);
2974 /* Build the corresponding TEMPLATE_DECL. */
2975 d = build_decl (TEMPLATE_DECL, name, t);
2976 TYPE_NAME (TREE_TYPE (d)) = d;
2977 TYPE_STUB_DECL (TREE_TYPE (d)) = d;
2978 DECL_CONTEXT (d) = FROB_CONTEXT (context);
2979 DECL_ARTIFICIAL (d) = 1;
2980 DECL_TEMPLATE_PARMS (d) = parm_list;
2987 /* Push the declarations of builtin types into the namespace.
2988 RID_INDEX is the index of the builtin type in the array
2989 RID_POINTERS. NAME is the name used when looking up the builtin
2990 type. TYPE is the _TYPE node for the builtin type. */
2993 record_builtin_type (enum rid rid_index,
2997 tree rname = NULL_TREE, tname = NULL_TREE;
2998 tree tdecl = NULL_TREE;
3000 if ((int) rid_index < (int) RID_MAX)
3001 rname = ridpointers[(int) rid_index];
3003 tname = get_identifier (name);
3005 /* The calls to SET_IDENTIFIER_GLOBAL_VALUE below should be
3006 eliminated. Built-in types should not be looked up name; their
3007 names are keywords that the parser can recognize. However, there
3008 is code in c-common.c that uses identifier_global_value to look
3009 up built-in types by name. */
3012 tdecl = build_decl (TYPE_DECL, tname, type);
3013 DECL_ARTIFICIAL (tdecl) = 1;
3014 SET_IDENTIFIER_GLOBAL_VALUE (tname, tdecl);
3020 tdecl = build_decl (TYPE_DECL, rname, type);
3021 DECL_ARTIFICIAL (tdecl) = 1;
3023 SET_IDENTIFIER_GLOBAL_VALUE (rname, tdecl);
3026 if (!TYPE_NAME (type))
3027 TYPE_NAME (type) = tdecl;
3030 debug_hooks->type_decl (tdecl, 0);
3033 /* Record one of the standard Java types.
3034 * Declare it as having the given NAME.
3035 * If SIZE > 0, it is the size of one of the integral types;
3036 * otherwise it is the negative of the size of one of the other types. */
3039 record_builtin_java_type (const char* name, int size)
3043 type = make_signed_type (size);
3044 else if (size > -32)
3045 { /* "__java_char" or ""__java_boolean". */
3046 type = make_unsigned_type (-size);
3047 /*if (size == -1) TREE_SET_CODE (type, BOOLEAN_TYPE);*/
3050 { /* "__java_float" or ""__java_double". */
3051 type = make_node (REAL_TYPE);
3052 TYPE_PRECISION (type) = - size;
3055 record_builtin_type (RID_MAX, name, type);
3056 decl = TYPE_NAME (type);
3058 /* Suppress generate debug symbol entries for these types,
3059 since for normal C++ they are just clutter.
3060 However, push_lang_context undoes this if extern "Java" is seen. */
3061 DECL_IGNORED_P (decl) = 1;
3063 TYPE_FOR_JAVA (type) = 1;
3067 /* Push a type into the namespace so that the back ends ignore it. */
3070 record_unknown_type (tree type, const char* name)
3072 tree decl = pushdecl (build_decl (TYPE_DECL, get_identifier (name), type));
3073 /* Make sure the "unknown type" typedecl gets ignored for debug info. */
3074 DECL_IGNORED_P (decl) = 1;
3075 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
3076 TYPE_SIZE (type) = TYPE_SIZE (void_type_node);
3077 TYPE_ALIGN (type) = 1;
3078 TYPE_USER_ALIGN (type) = 0;
3079 TYPE_MODE (type) = TYPE_MODE (void_type_node);
3082 /* A string for which we should create an IDENTIFIER_NODE at
3085 typedef struct predefined_identifier
3087 /* The name of the identifier. */
3088 const char *const name;
3089 /* The place where the IDENTIFIER_NODE should be stored. */
3091 /* Nonzero if this is the name of a constructor or destructor. */
3092 const int ctor_or_dtor_p;
3093 } predefined_identifier;
3095 /* Create all the predefined identifiers. */
3098 initialize_predefined_identifiers (void)
3100 const predefined_identifier *pid;
3102 /* A table of identifiers to create at startup. */
3103 static const predefined_identifier predefined_identifiers[] = {
3104 { "C++", &lang_name_cplusplus, 0 },
3105 { "C", &lang_name_c, 0 },
3106 { "Java", &lang_name_java, 0 },
3107 /* Some of these names have a trailing space so that it is
3108 impossible for them to conflict with names written by users. */
3109 { "__ct ", &ctor_identifier, 1 },
3110 { "__base_ctor ", &base_ctor_identifier, 1 },
3111 { "__comp_ctor ", &complete_ctor_identifier, 1 },
3112 { "__dt ", &dtor_identifier, 1 },
3113 { "__comp_dtor ", &complete_dtor_identifier, 1 },
3114 { "__base_dtor ", &base_dtor_identifier, 1 },
3115 { "__deleting_dtor ", &deleting_dtor_identifier, 1 },
3116 { IN_CHARGE_NAME, &in_charge_identifier, 0 },
3117 { "nelts", &nelts_identifier, 0 },
3118 { THIS_NAME, &this_identifier, 0 },
3119 { VTABLE_DELTA_NAME, &delta_identifier, 0 },
3120 { VTABLE_PFN_NAME, &pfn_identifier, 0 },
3121 { "_vptr", &vptr_identifier, 0 },
3122 { "__vtt_parm", &vtt_parm_identifier, 0 },
3123 { "::", &global_scope_name, 0 },
3124 { "std", &std_identifier, 0 },
3128 for (pid = predefined_identifiers; pid->name; ++pid)
3130 *pid->node = get_identifier (pid->name);
3131 if (pid->ctor_or_dtor_p)
3132 IDENTIFIER_CTOR_OR_DTOR_P (*pid->node) = 1;
3136 /* Create the predefined scalar types of C,
3137 and some nodes representing standard constants (0, 1, (void *)0).
3138 Initialize the global binding level.
3139 Make definitions for built-in primitive functions. */
3142 cxx_init_decl_processing (void)
3145 tree void_ftype_ptr;
3147 build_common_tree_nodes (flag_signed_char, false);
3149 /* Create all the identifiers we need. */
3150 initialize_predefined_identifiers ();
3152 /* Create the global variables. */
3153 push_to_top_level ();
3155 current_function_decl = NULL_TREE;
3156 current_binding_level = NULL;
3157 /* Enter the global namespace. */
3158 gcc_assert (global_namespace == NULL_TREE);
3159 global_namespace = build_lang_decl (NAMESPACE_DECL, global_scope_name,
3161 TREE_PUBLIC (global_namespace) = 1;
3162 begin_scope (sk_namespace, global_namespace);
3164 current_lang_name = NULL_TREE;
3166 /* Force minimum function alignment if using the least significant
3167 bit of function pointers to store the virtual bit. */
3168 if (TARGET_PTRMEMFUNC_VBIT_LOCATION == ptrmemfunc_vbit_in_pfn
3169 && force_align_functions_log < 1)
3170 force_align_functions_log = 1;
3173 current_lang_name = lang_name_c;
3175 /* Create the `std' namespace. */
3176 push_namespace (std_identifier);
3177 std_node = current_namespace;
3180 c_common_nodes_and_builtins ();
3182 java_byte_type_node = record_builtin_java_type ("__java_byte", 8);
3183 java_short_type_node = record_builtin_java_type ("__java_short", 16);
3184 java_int_type_node = record_builtin_java_type ("__java_int", 32);
3185 java_long_type_node = record_builtin_java_type ("__java_long", 64);
3186 java_float_type_node = record_builtin_java_type ("__java_float", -32);
3187 java_double_type_node = record_builtin_java_type ("__java_double", -64);
3188 java_char_type_node = record_builtin_java_type ("__java_char", -16);
3189 java_boolean_type_node = record_builtin_java_type ("__java_boolean", -1);
3191 integer_two_node = build_int_cst (NULL_TREE, 2);
3192 integer_three_node = build_int_cst (NULL_TREE, 3);
3194 record_builtin_type (RID_BOOL, "bool", boolean_type_node);
3195 truthvalue_type_node = boolean_type_node;
3196 truthvalue_false_node = boolean_false_node;
3197 truthvalue_true_node = boolean_true_node;
3199 empty_except_spec = build_tree_list (NULL_TREE, NULL_TREE);
3202 record_builtin_type (RID_MAX, NULL, string_type_node);
3205 delta_type_node = ptrdiff_type_node;
3206 vtable_index_type = ptrdiff_type_node;
3208 vtt_parm_type = build_pointer_type (const_ptr_type_node);
3209 void_ftype = build_function_type (void_type_node, void_list_node);
3210 void_ftype_ptr = build_function_type (void_type_node,
3211 tree_cons (NULL_TREE,
3215 = build_exception_variant (void_ftype_ptr, empty_except_spec);
3217 /* C++ extensions */
3219 unknown_type_node = make_node (UNKNOWN_TYPE);
3220 record_unknown_type (unknown_type_node, "unknown type");
3222 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
3223 TREE_TYPE (unknown_type_node) = unknown_type_node;
3225 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
3227 TYPE_POINTER_TO (unknown_type_node) = unknown_type_node;
3228 TYPE_REFERENCE_TO (unknown_type_node) = unknown_type_node;
3231 /* Make sure we get a unique function type, so we can give
3232 its pointer type a name. (This wins for gdb.) */
3233 tree vfunc_type = make_node (FUNCTION_TYPE);
3234 TREE_TYPE (vfunc_type) = integer_type_node;
3235 TYPE_ARG_TYPES (vfunc_type) = NULL_TREE;
3236 layout_type (vfunc_type);
3238 vtable_entry_type = build_pointer_type (vfunc_type);
3240 record_builtin_type (RID_MAX, VTBL_PTR_TYPE, vtable_entry_type);
3243 = build_cplus_array_type (vtable_entry_type, NULL_TREE);
3244 layout_type (vtbl_type_node);
3245 vtbl_type_node = build_qualified_type (vtbl_type_node, TYPE_QUAL_CONST);
3246 record_builtin_type (RID_MAX, NULL, vtbl_type_node);
3247 vtbl_ptr_type_node = build_pointer_type (vtable_entry_type);
3248 layout_type (vtbl_ptr_type_node);
3249 record_builtin_type (RID_MAX, NULL, vtbl_ptr_type_node);
3251 push_namespace (get_identifier ("__cxxabiv1"));
3252 abi_node = current_namespace;
3255 global_type_node = make_node (LANG_TYPE);
3256 record_unknown_type (global_type_node, "global type");
3259 current_lang_name = lang_name_cplusplus;
3263 tree bad_alloc_type_node;
3264 tree bad_alloc_decl;
3265 tree newtype, deltype;
3266 tree ptr_ftype_sizetype;
3268 push_namespace (std_identifier);
3269 bad_alloc_id = get_identifier ("bad_alloc");
3270 bad_alloc_type_node = make_aggr_type (RECORD_TYPE);
3271 TYPE_CONTEXT (bad_alloc_type_node) = current_namespace;
3273 = create_implicit_typedef (bad_alloc_id, bad_alloc_type_node);
3274 DECL_CONTEXT (bad_alloc_decl) = current_namespace;
3275 TYPE_STUB_DECL (bad_alloc_type_node) = bad_alloc_decl;
3279 = build_function_type (ptr_type_node,
3280 tree_cons (NULL_TREE,
3283 newtype = build_exception_variant
3284 (ptr_ftype_sizetype, add_exception_specifier
3285 (NULL_TREE, bad_alloc_type_node, -1));
3286 deltype = build_exception_variant (void_ftype_ptr, empty_except_spec);
3287 push_cp_library_fn (NEW_EXPR, newtype);
3288 push_cp_library_fn (VEC_NEW_EXPR, newtype);
3289 global_delete_fndecl = push_cp_library_fn (DELETE_EXPR, deltype);
3290 push_cp_library_fn (VEC_DELETE_EXPR, deltype);
3294 = build_library_fn_ptr ("__cxa_pure_virtual", void_ftype);
3296 /* Perform other language dependent initializations. */
3297 init_class_processing ();
3298 init_rtti_processing ();
3300 if (flag_exceptions)
3301 init_exception_processing ();
3303 if (! supports_one_only ())
3306 make_fname_decl = cp_make_fname_decl;
3307 start_fname_decls ();
3309 /* Show we use EH for cleanups. */
3310 if (flag_exceptions)
3311 using_eh_for_cleanups ();
3314 /* Generate an initializer for a function naming variable from
3315 NAME. NAME may be NULL, to indicate a dependent name. TYPE_P is
3316 filled in with the type of the init. */
3319 cp_fname_init (const char* name, tree *type_p)
3321 tree domain = NULL_TREE;
3323 tree init = NULL_TREE;
3328 length = strlen (name);
3329 domain = build_index_type (size_int (length));
3330 init = build_string (length + 1, name);
3333 type = build_qualified_type (char_type_node, TYPE_QUAL_CONST);
3334 type = build_cplus_array_type (type, domain);
3339 TREE_TYPE (init) = type;
3341 init = error_mark_node;
3346 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give the
3347 decl, NAME is the initialization string and TYPE_DEP indicates whether
3348 NAME depended on the type of the function. We make use of that to detect
3349 __PRETTY_FUNCTION__ inside a template fn. This is being done
3350 lazily at the point of first use, so we mustn't push the decl now. */
3353 cp_make_fname_decl (tree id, int type_dep)
3355 const char *const name = (type_dep && processing_template_decl
3356 ? NULL : fname_as_string (type_dep));
3358 tree init = cp_fname_init (name, &type);
3359 tree decl = build_decl (VAR_DECL, id, type);
3362 free ((char *) name);
3364 /* As we're using pushdecl_with_scope, we must set the context. */
3365 DECL_CONTEXT (decl) = current_function_decl;
3366 DECL_PRETTY_FUNCTION_P (decl) = type_dep;
3368 TREE_STATIC (decl) = 1;
3369 TREE_READONLY (decl) = 1;
3370 DECL_ARTIFICIAL (decl) = 1;
3372 TREE_USED (decl) = 1;
3374 if (current_function_decl)
3376 struct cp_binding_level *b = current_binding_level;
3377 while (b->level_chain->kind != sk_function_parms)
3379 pushdecl_with_scope (decl, b, /*is_friend=*/false);
3380 cp_finish_decl (decl, init, /*init_const_expr_p=*/false, NULL_TREE,
3381 LOOKUP_ONLYCONVERTING);
3384 pushdecl_top_level_and_finish (decl, init);
3390 builtin_function_1 (tree decl, tree context)
3392 tree id = DECL_NAME (decl);
3393 const char *name = IDENTIFIER_POINTER (id);
3395 retrofit_lang_decl (decl);
3397 /* All nesting of C++ functions is lexical; there is never a "static
3398 chain" in the sense of GNU C nested functions. */
3399 DECL_NO_STATIC_CHAIN (decl) = 1;
3401 DECL_ARTIFICIAL (decl) = 1;
3402 SET_OVERLOADED_OPERATOR_CODE (decl, ERROR_MARK);
3403 SET_DECL_LANGUAGE (decl, lang_c);
3404 /* Runtime library routines are, by definition, available in an
3405 external shared object. */
3406 DECL_VISIBILITY (decl) = VISIBILITY_DEFAULT;
3407 DECL_VISIBILITY_SPECIFIED (decl) = 1;
3409 DECL_CONTEXT (decl) = context;
3413 /* A function in the user's namespace should have an explicit
3414 declaration before it is used. Mark the built-in function as
3415 anticipated but not actually declared. */
3416 if (name[0] != '_' || name[1] != '_')
3417 DECL_ANTICIPATED (decl) = 1;
3423 cxx_builtin_function (tree decl)
3425 tree id = DECL_NAME (decl);
3426 const char *name = IDENTIFIER_POINTER (id);
3427 /* All builtins that don't begin with an '_' should additionally
3428 go in the 'std' namespace. */
3431 tree decl2 = copy_node(decl);
3432 push_namespace (std_identifier);
3433 builtin_function_1 (decl2, std_node);
3437 return builtin_function_1 (decl, NULL_TREE);
3440 /* Generate a FUNCTION_DECL with the typical flags for a runtime library
3441 function. Not called directly. */
3444 build_library_fn_1 (tree name, enum tree_code operator_code, tree type)
3446 tree fn = build_lang_decl (FUNCTION_DECL, name, type);
3447 DECL_EXTERNAL (fn) = 1;
3448 TREE_PUBLIC (fn) = 1;
3449 DECL_ARTIFICIAL (fn) = 1;
3450 SET_OVERLOADED_OPERATOR_CODE (fn, operator_code);
3451 SET_DECL_LANGUAGE (fn, lang_c);
3452 /* Runtime library routines are, by definition, available in an
3453 external shared object. */
3454 DECL_VISIBILITY (fn) = VISIBILITY_DEFAULT;
3455 DECL_VISIBILITY_SPECIFIED (fn) = 1;
3459 /* Returns the _DECL for a library function with C linkage.
3460 We assume that such functions never throw; if this is incorrect,
3461 callers should unset TREE_NOTHROW. */
3464 build_library_fn (tree name, tree type)
3466 tree fn = build_library_fn_1 (name, ERROR_MARK, type);
3467 TREE_NOTHROW (fn) = 1;
3471 /* Returns the _DECL for a library function with C++ linkage. */
3474 build_cp_library_fn (tree name, enum tree_code operator_code, tree type)
3476 tree fn = build_library_fn_1 (name, operator_code, type);
3477 TREE_NOTHROW (fn) = TYPE_NOTHROW_P (type);
3478 DECL_CONTEXT (fn) = FROB_CONTEXT (current_namespace);
3479 SET_DECL_LANGUAGE (fn, lang_cplusplus);
3483 /* Like build_library_fn, but takes a C string instead of an
3487 build_library_fn_ptr (const char* name, tree type)
3489 return build_library_fn (get_identifier (name), type);
3492 /* Like build_cp_library_fn, but takes a C string instead of an
3496 build_cp_library_fn_ptr (const char* name, tree type)
3498 return build_cp_library_fn (get_identifier (name), ERROR_MARK, type);
3501 /* Like build_library_fn, but also pushes the function so that we will
3502 be able to find it via IDENTIFIER_GLOBAL_VALUE. */
3505 push_library_fn (tree name, tree type)
3507 tree fn = build_library_fn (name, type);
3508 pushdecl_top_level (fn);
3512 /* Like build_cp_library_fn, but also pushes the function so that it
3513 will be found by normal lookup. */
3516 push_cp_library_fn (enum tree_code operator_code, tree type)
3518 tree fn = build_cp_library_fn (ansi_opname (operator_code),
3525 /* Like push_library_fn, but takes a TREE_LIST of parm types rather than
3529 push_void_library_fn (tree name, tree parmtypes)
3531 tree type = build_function_type (void_type_node, parmtypes);
3532 return push_library_fn (name, type);
3535 /* Like push_library_fn, but also note that this function throws
3536 and does not return. Used for __throw_foo and the like. */
3539 push_throw_library_fn (tree name, tree type)
3541 tree fn = push_library_fn (name, type);
3542 TREE_THIS_VOLATILE (fn) = 1;
3543 TREE_NOTHROW (fn) = 0;
3547 /* When we call finish_struct for an anonymous union, we create
3548 default copy constructors and such. But, an anonymous union
3549 shouldn't have such things; this function undoes the damage to the
3550 anonymous union type T.
3552 (The reason that we create the synthesized methods is that we don't
3553 distinguish `union { int i; }' from `typedef union { int i; } U'.
3554 The first is an anonymous union; the second is just an ordinary
3558 fixup_anonymous_aggr (tree t)
3562 /* Wipe out memory of synthesized methods. */
3563 TYPE_HAS_CONSTRUCTOR (t) = 0;
3564 TYPE_HAS_DEFAULT_CONSTRUCTOR (t) = 0;
3565 TYPE_HAS_INIT_REF (t) = 0;
3566 TYPE_HAS_CONST_INIT_REF (t) = 0;
3567 TYPE_HAS_ASSIGN_REF (t) = 0;
3568 TYPE_HAS_CONST_ASSIGN_REF (t) = 0;
3570 /* Splice the implicitly generated functions out of the TYPE_METHODS
3572 q = &TYPE_METHODS (t);
3575 if (DECL_ARTIFICIAL (*q))
3576 *q = TREE_CHAIN (*q);
3578 q = &TREE_CHAIN (*q);
3581 /* ISO C++ 9.5.3. Anonymous unions may not have function members. */
3582 if (TYPE_METHODS (t))
3583 error ("%Jan anonymous union cannot have function members",
3584 TYPE_MAIN_DECL (t));
3586 /* Anonymous aggregates cannot have fields with ctors, dtors or complex
3587 assignment operators (because they cannot have these methods themselves).
3588 For anonymous unions this is already checked because they are not allowed
3589 in any union, otherwise we have to check it. */
3590 if (TREE_CODE (t) != UNION_TYPE)
3594 for (field = TYPE_FIELDS (t); field; field = TREE_CHAIN (field))
3595 if (TREE_CODE (field) == FIELD_DECL)
3597 type = TREE_TYPE (field);
3598 if (CLASS_TYPE_P (type))
3600 if (TYPE_NEEDS_CONSTRUCTING (type))
3601 error ("member %q+#D with constructor not allowed "
3602 "in anonymous aggregate", field);
3603 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
3604 error ("member %q+#D with destructor not allowed "
3605 "in anonymous aggregate", field);
3606 if (TYPE_HAS_COMPLEX_ASSIGN_REF (type))
3607 error ("member %q+#D with copy assignment operator "
3608 "not allowed in anonymous aggregate", field);
3614 /* Make sure that a declaration with no declarator is well-formed, i.e.
3615 just declares a tagged type or anonymous union.
3617 Returns the type declared; or NULL_TREE if none. */
3620 check_tag_decl (cp_decl_specifier_seq *declspecs)
3622 int saw_friend = declspecs->specs[(int)ds_friend] != 0;
3623 int saw_typedef = declspecs->specs[(int)ds_typedef] != 0;
3624 /* If a class, struct, or enum type is declared by the DECLSPECS
3625 (i.e, if a class-specifier, enum-specifier, or non-typename
3626 elaborated-type-specifier appears in the DECLSPECS),
3627 DECLARED_TYPE is set to the corresponding type. */
3628 tree declared_type = NULL_TREE;
3629 bool error_p = false;
3631 if (declspecs->multiple_types_p)
3632 error ("multiple types in one declaration");
3633 else if (declspecs->redefined_builtin_type)
3635 if (!in_system_header)
3636 pedwarn ("redeclaration of C++ built-in type %qT",
3637 declspecs->redefined_builtin_type);
3642 && TYPE_P (declspecs->type)
3643 && ((TREE_CODE (declspecs->type) != TYPENAME_TYPE
3644 && IS_AGGR_TYPE (declspecs->type))
3645 || TREE_CODE (declspecs->type) == ENUMERAL_TYPE))
3646 declared_type = declspecs->type;
3647 else if (declspecs->type == error_mark_node)
3649 if (declared_type == NULL_TREE && ! saw_friend && !error_p)
3650 pedwarn ("declaration does not declare anything");
3651 /* Check for an anonymous union. */
3652 else if (declared_type && IS_AGGR_TYPE_CODE (TREE_CODE (declared_type))
3653 && TYPE_ANONYMOUS_P (declared_type))
3655 /* 7/3 In a simple-declaration, the optional init-declarator-list
3656 can be omitted only when declaring a class (clause 9) or
3657 enumeration (7.2), that is, when the decl-specifier-seq contains
3658 either a class-specifier, an elaborated-type-specifier with
3659 a class-key (9.1), or an enum-specifier. In these cases and
3660 whenever a class-specifier or enum-specifier is present in the
3661 decl-specifier-seq, the identifiers in these specifiers are among
3662 the names being declared by the declaration (as class-name,
3663 enum-names, or enumerators, depending on the syntax). In such
3664 cases, and except for the declaration of an unnamed bit-field (9.6),
3665 the decl-specifier-seq shall introduce one or more names into the
3666 program, or shall redeclare a name introduced by a previous
3667 declaration. [Example:
3668 enum { }; // ill-formed
3669 typedef class { }; // ill-formed
3673 error ("missing type-name in typedef-declaration");
3676 /* Anonymous unions are objects, so they can have specifiers. */;
3677 SET_ANON_AGGR_TYPE_P (declared_type);
3679 if (TREE_CODE (declared_type) != UNION_TYPE && pedantic
3680 && !in_system_header)
3681 pedwarn ("ISO C++ prohibits anonymous structs");
3686 if (declspecs->specs[(int)ds_inline]
3687 || declspecs->specs[(int)ds_virtual])
3688 error ("%qs can only be specified for functions",
3689 declspecs->specs[(int)ds_inline]
3690 ? "inline" : "virtual");
3692 && (!current_class_type
3693 || current_scope () != current_class_type))
3694 error ("%<friend%> can only be specified inside a class");
3695 else if (declspecs->specs[(int)ds_explicit])
3696 error ("%<explicit%> can only be specified for constructors");
3697 else if (declspecs->storage_class)
3698 error ("a storage class can only be specified for objects "
3700 else if (declspecs->specs[(int)ds_const]
3701 || declspecs->specs[(int)ds_volatile]
3702 || declspecs->specs[(int)ds_restrict]
3703 || declspecs->specs[(int)ds_thread])
3704 error ("qualifiers can only be specified for objects "
3706 else if (saw_typedef)
3707 warning (0, "%<typedef%> was ignored in this declaration");
3710 return declared_type;
3713 /* Called when a declaration is seen that contains no names to declare.
3714 If its type is a reference to a structure, union or enum inherited
3715 from a containing scope, shadow that tag name for the current scope
3716 with a forward reference.
3717 If its type defines a new named structure or union
3718 or defines an enum, it is valid but we need not do anything here.
3719 Otherwise, it is an error.
3721 C++: may have to grok the declspecs to learn about static,
3722 complain for anonymous unions.
3724 Returns the TYPE declared -- or NULL_TREE if none. */
3727 shadow_tag (cp_decl_specifier_seq *declspecs)
3729 tree t = check_tag_decl (declspecs);
3734 if (declspecs->attributes)
3736 warning (0, "attribute ignored in declaration of %q+#T", t);
3737 warning (0, "attribute for %q+#T must follow the %qs keyword",
3738 t, class_key_or_enum_as_string (t));
3742 if (maybe_process_partial_specialization (t) == error_mark_node)
3745 /* This is where the variables in an anonymous union are
3746 declared. An anonymous union declaration looks like:
3748 because there is no declarator after the union, the parser
3749 sends that declaration here. */
3750 if (ANON_AGGR_TYPE_P (t))
3752 fixup_anonymous_aggr (t);
3754 if (TYPE_FIELDS (t))
3756 tree decl = grokdeclarator (/*declarator=*/NULL,
3757 declspecs, NORMAL, 0, NULL);
3758 finish_anon_union (decl);
3765 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
3768 groktypename (cp_decl_specifier_seq *type_specifiers,
3769 const cp_declarator *declarator)
3773 attrs = type_specifiers->attributes;
3774 type_specifiers->attributes = NULL_TREE;
3775 type = grokdeclarator (declarator, type_specifiers, TYPENAME, 0, &attrs);
3777 cplus_decl_attributes (&type, attrs, 0);
3781 /* Decode a declarator in an ordinary declaration or data definition.
3782 This is called as soon as the type information and variable name
3783 have been parsed, before parsing the initializer if any.
3784 Here we create the ..._DECL node, fill in its type,
3785 and put it on the list of decls for the current context.
3786 The ..._DECL node is returned as the value.
3788 Exception: for arrays where the length is not specified,
3789 the type is left null, to be filled in by `cp_finish_decl'.
3791 Function definitions do not come here; they go to start_function
3792 instead. However, external and forward declarations of functions
3793 do go through here. Structure field declarations are done by
3794 grokfield and not through here. */
3797 start_decl (const cp_declarator *declarator,
3798 cp_decl_specifier_seq *declspecs,
3801 tree prefix_attributes,
3802 tree *pushed_scope_p)
3809 *pushed_scope_p = NULL_TREE;
3811 /* An object declared as __attribute__((deprecated)) suppresses
3812 warnings of uses of other deprecated items. */
3813 if (lookup_attribute ("deprecated", attributes))
3814 deprecated_state = DEPRECATED_SUPPRESS;
3816 attributes = chainon (attributes, prefix_attributes);
3818 decl = grokdeclarator (declarator, declspecs, NORMAL, initialized,
3821 deprecated_state = DEPRECATED_NORMAL;
3823 if (decl == NULL_TREE || TREE_CODE (decl) == VOID_TYPE
3824 || decl == error_mark_node)
3825 return error_mark_node;
3827 type = TREE_TYPE (decl);
3829 context = DECL_CONTEXT (decl);
3833 *pushed_scope_p = push_scope (context);
3835 /* We are only interested in class contexts, later. */
3836 if (TREE_CODE (context) == NAMESPACE_DECL)
3837 context = NULL_TREE;
3841 /* Is it valid for this decl to have an initializer at all?
3842 If not, set INITIALIZED to zero, which will indirectly
3843 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
3844 switch (TREE_CODE (decl))
3847 error ("typedef %qD is initialized (use __typeof__ instead)", decl);
3848 return error_mark_node;
3851 error ("function %q#D is initialized like a variable", decl);
3852 return error_mark_node;
3860 if (! toplevel_bindings_p ()
3861 && DECL_EXTERNAL (decl))
3862 warning (0, "declaration of %q#D has %<extern%> and is initialized",
3864 DECL_EXTERNAL (decl) = 0;
3865 if (toplevel_bindings_p ())
3866 TREE_STATIC (decl) = 1;
3869 /* Set attributes here so if duplicate decl, will have proper attributes. */
3870 cplus_decl_attributes (&decl, attributes, 0);
3872 /* Dllimported symbols cannot be defined. Static data members (which
3873 can be initialized in-class and dllimported) go through grokfield,
3874 not here, so we don't need to exclude those decls when checking for
3876 if (initialized && DECL_DLLIMPORT_P (decl))
3878 error ("definition of %q#D is marked %<dllimport%>", decl);
3879 DECL_DLLIMPORT_P (decl) = 0;
3882 /* If #pragma weak was used, mark the decl weak now. */
3883 maybe_apply_pragma_weak (decl);
3885 if (TREE_CODE (decl) == FUNCTION_DECL
3886 && DECL_DECLARED_INLINE_P (decl)
3887 && DECL_UNINLINABLE (decl)
3888 && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl)))
3889 warning (0, "inline function %q+D given attribute noinline", decl);
3891 if (context && COMPLETE_TYPE_P (complete_type (context)))
3893 if (TREE_CODE (decl) == VAR_DECL)
3895 tree field = lookup_field (context, DECL_NAME (decl), 0, false);
3896 if (field == NULL_TREE || TREE_CODE (field) != VAR_DECL)
3897 error ("%q#D is not a static member of %q#T", decl, context);
3900 if (DECL_CONTEXT (field) != context)
3902 if (!same_type_p (DECL_CONTEXT (field), context))
3903 pedwarn ("ISO C++ does not permit %<%T::%D%> "
3904 "to be defined as %<%T::%D%>",
3905 DECL_CONTEXT (field), DECL_NAME (decl),
3906 context, DECL_NAME (decl));
3907 DECL_CONTEXT (decl) = DECL_CONTEXT (field);
3909 if (processing_specialization
3910 && template_class_depth (context) == 0
3911 && CLASSTYPE_TEMPLATE_SPECIALIZATION (context))
3912 error ("template header not allowed in member definition "
3913 "of explicitly specialized class");
3914 /* Static data member are tricky; an in-class initialization
3915 still doesn't provide a definition, so the in-class
3916 declaration will have DECL_EXTERNAL set, but will have an
3917 initialization. Thus, duplicate_decls won't warn
3918 about this situation, and so we check here. */
3919 if (initialized && DECL_INITIALIZED_IN_CLASS_P (field))
3920 error ("duplicate initialization of %qD", decl);
3921 if (duplicate_decls (decl, field, /*newdecl_is_friend=*/false))
3927 tree field = check_classfn (context, decl,
3928 (processing_template_decl
3929 > template_class_depth (context))
3930 ? current_template_parms
3932 if (field && duplicate_decls (decl, field,
3933 /*newdecl_is_friend=*/false))
3937 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
3938 DECL_IN_AGGR_P (decl) = 0;
3939 /* Do not mark DECL as an explicit specialization if it was not
3940 already marked as an instantiation; a declaration should
3941 never be marked as a specialization unless we know what
3942 template is being specialized. */
3943 if (DECL_LANG_SPECIFIC (decl) && DECL_USE_TEMPLATE (decl))
3945 SET_DECL_TEMPLATE_SPECIALIZATION (decl);
3947 /* [temp.expl.spec] An explicit specialization of a static data
3948 member of a template is a definition if the declaration
3949 includes an initializer; otherwise, it is a declaration.
3951 We check for processing_specialization so this only applies
3952 to the new specialization syntax. */
3953 if (!initialized && processing_specialization)
3954 DECL_EXTERNAL (decl) = 1;
3957 if (DECL_EXTERNAL (decl) && ! DECL_TEMPLATE_SPECIALIZATION (decl))
3958 pedwarn ("declaration of %q#D outside of class is not definition",
3962 was_public = TREE_PUBLIC (decl);
3964 /* Enter this declaration into the symbol table. */
3965 tem = maybe_push_decl (decl);
3967 if (processing_template_decl)
3968 tem = push_template_decl (tem);
3969 if (tem == error_mark_node)
3970 return error_mark_node;
3972 /* Tell the back end to use or not use .common as appropriate. If we say
3973 -fconserve-space, we want this to save .data space, at the expense of
3974 wrong semantics. If we say -fno-conserve-space, we want this to
3975 produce errors about redefs; to do this we force variables into the
3977 if (flag_conserve_space
3978 && TREE_CODE (tem) == VAR_DECL
3979 && TREE_PUBLIC (tem)
3980 && !DECL_THREAD_LOCAL_P (tem)
3981 && !have_global_bss_p ())
3982 DECL_COMMON (tem) = 1;
3984 if (TREE_CODE (tem) == VAR_DECL
3985 && DECL_NAMESPACE_SCOPE_P (tem) && !TREE_PUBLIC (tem) && !was_public
3986 && !DECL_THIS_STATIC (tem) && !DECL_ARTIFICIAL (tem))
3988 /* This is a const variable with implicit 'static'. Set
3989 DECL_THIS_STATIC so we can tell it from variables that are
3990 !TREE_PUBLIC because of the anonymous namespace. */
3991 gcc_assert (cp_type_readonly (TREE_TYPE (tem)));
3992 DECL_THIS_STATIC (tem) = 1;
3995 if (!processing_template_decl && TREE_CODE (tem) == VAR_DECL)
3996 start_decl_1 (tem, initialized);
4002 start_decl_1 (tree decl, bool initialized)
4006 gcc_assert (!processing_template_decl);
4008 if (error_operand_p (decl))
4011 gcc_assert (TREE_CODE (decl) == VAR_DECL);
4012 type = TREE_TYPE (decl);
4015 /* Is it valid for this decl to have an initializer at all?
4016 If not, set INITIALIZED to zero, which will indirectly
4017 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
4019 /* Don't allow initializations for incomplete types except for
4020 arrays which might be completed by the initialization. */
4021 if (COMPLETE_TYPE_P (complete_type (type)))
4022 ; /* A complete type is ok. */
4023 else if (TREE_CODE (type) != ARRAY_TYPE)
4025 error ("variable %q#D has initializer but incomplete type", decl);
4027 type = TREE_TYPE (decl) = error_mark_node;
4029 else if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (type))))
4031 if (DECL_LANG_SPECIFIC (decl) && DECL_TEMPLATE_INFO (decl))
4032 error ("elements of array %q#D have incomplete type", decl);
4033 /* else we already gave an error in start_decl. */
4037 else if (IS_AGGR_TYPE (type)
4038 && ! DECL_EXTERNAL (decl))
4040 if (!COMPLETE_TYPE_P (complete_type (type)))
4042 error ("aggregate %q#D has incomplete type and cannot be defined",
4044 /* Change the type so that assemble_variable will give
4045 DECL an rtl we can live with: (mem (const_int 0)). */
4046 type = TREE_TYPE (decl) = error_mark_node;
4050 /* If any base type in the hierarchy of TYPE needs a constructor,
4051 then we set initialized to 1. This way any nodes which are
4052 created for the purposes of initializing this aggregate
4053 will live as long as it does. This is necessary for global
4054 aggregates which do not have their initializers processed until
4055 the end of the file. */
4056 initialized = TYPE_NEEDS_CONSTRUCTING (type);
4060 /* Create a new scope to hold this declaration if necessary.
4061 Whether or not a new scope is necessary cannot be determined
4062 until after the type has been completed; if the type is a
4063 specialization of a class template it is not until after
4064 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
4065 will be set correctly. */
4066 maybe_push_cleanup_level (type);
4069 /* Handle initialization of references. DECL, TYPE, and INIT have the
4070 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
4071 but will be set to a new CLEANUP_STMT if a temporary is created
4072 that must be destroyed subsequently.
4074 Returns an initializer expression to use to initialize DECL, or
4075 NULL if the initialization can be performed statically.
4077 Quotes on semantics can be found in ARM 8.4.3. */
4080 grok_reference_init (tree decl, tree type, tree init, tree *cleanup)
4084 if (init == NULL_TREE)
4086 if ((DECL_LANG_SPECIFIC (decl) == 0
4087 || DECL_IN_AGGR_P (decl) == 0)
4088 && ! DECL_THIS_EXTERN (decl))
4089 error ("%qD declared as reference but not initialized", decl);
4093 if (TREE_CODE (init) == CONSTRUCTOR)
4095 error ("ISO C++ forbids use of initializer list to "
4096 "initialize reference %qD", decl);
4100 if (TREE_CODE (init) == TREE_LIST)
4101 init = build_x_compound_expr_from_list (init, "initializer");
4103 if (TREE_CODE (TREE_TYPE (type)) != ARRAY_TYPE
4104 && TREE_CODE (TREE_TYPE (init)) == ARRAY_TYPE)
4105 /* Note: default conversion is only called in very special cases. */
4106 init = decay_conversion (init);
4108 /* Convert INIT to the reference type TYPE. This may involve the
4109 creation of a temporary, whose lifetime must be the same as that
4110 of the reference. If so, a DECL_EXPR for the temporary will be
4111 added just after the DECL_EXPR for DECL. That's why we don't set
4112 DECL_INITIAL for local references (instead assigning to them
4113 explicitly); we need to allow the temporary to be initialized
4115 tmp = initialize_reference (type, init, decl, cleanup);
4117 if (tmp == error_mark_node)
4119 else if (tmp == NULL_TREE)
4121 error ("cannot initialize %qT from %qT", type, TREE_TYPE (init));
4125 if (TREE_STATIC (decl) && !TREE_CONSTANT (tmp))
4128 DECL_INITIAL (decl) = tmp;
4133 /* Designated initializers in arrays are not supported in GNU C++.
4134 The parser cannot detect this error since it does not know whether
4135 a given brace-enclosed initializer is for a class type or for an
4136 array. This function checks that CE does not use a designated
4137 initializer. If it does, an error is issued. Returns true if CE
4138 is valid, i.e., does not have a designated initializer. */
4141 check_array_designated_initializer (const constructor_elt *ce)
4143 /* Designated initializers for array elements are not supported. */
4146 /* The parser only allows identifiers as designated
4148 gcc_assert (TREE_CODE (ce->index) == IDENTIFIER_NODE);
4149 error ("name %qD used in a GNU-style designated "
4150 "initializer for an array", ce->index);
4157 /* When parsing `int a[] = {1, 2};' we don't know the size of the
4158 array until we finish parsing the initializer. If that's the
4159 situation we're in, update DECL accordingly. */
4162 maybe_deduce_size_from_array_init (tree decl, tree init)
4164 tree type = TREE_TYPE (decl);
4166 if (TREE_CODE (type) == ARRAY_TYPE
4167 && TYPE_DOMAIN (type) == NULL_TREE
4168 && TREE_CODE (decl) != TYPE_DECL)
4170 /* do_default is really a C-ism to deal with tentative definitions.
4171 But let's leave it here to ease the eventual merge. */
4172 int do_default = !DECL_EXTERNAL (decl);
4173 tree initializer = init ? init : DECL_INITIAL (decl);
4176 /* Check that there are no designated initializers in INIT, as
4177 those are not supported in GNU C++, and as the middle-end
4178 will crash if presented with a non-numeric designated
4180 if (initializer && TREE_CODE (initializer) == CONSTRUCTOR)
4182 VEC(constructor_elt,gc) *v = CONSTRUCTOR_ELTS (initializer);
4183 constructor_elt *ce;
4186 VEC_iterate (constructor_elt, v, i, ce);
4188 if (!check_array_designated_initializer (ce))
4194 failure = cp_complete_array_type (&TREE_TYPE (decl), initializer,
4198 error ("initializer fails to determine size of %qD", decl);
4199 TREE_TYPE (decl) = error_mark_node;
4201 else if (failure == 2)
4205 error ("array size missing in %qD", decl);
4206 TREE_TYPE (decl) = error_mark_node;
4208 /* If a `static' var's size isn't known, make it extern as
4209 well as static, so it does not get allocated. If it's not
4210 `static', then don't mark it extern; finish_incomplete_decl
4211 will give it a default size and it will get allocated. */
4212 else if (!pedantic && TREE_STATIC (decl) && !TREE_PUBLIC (decl))
4213 DECL_EXTERNAL (decl) = 1;
4215 else if (failure == 3)
4217 error ("zero-size array %qD", decl);
4218 TREE_TYPE (decl) = error_mark_node;
4222 cp_apply_type_quals_to_decl (cp_type_quals (TREE_TYPE (decl)), decl);
4224 layout_decl (decl, 0);
4228 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
4229 any appropriate error messages regarding the layout. */
4232 layout_var_decl (tree decl)
4236 type = TREE_TYPE (decl);
4237 if (type == error_mark_node)
4240 /* If we haven't already layed out this declaration, do so now.
4241 Note that we must not call complete type for an external object
4242 because it's type might involve templates that we are not
4243 supposed to instantiate yet. (And it's perfectly valid to say
4244 `extern X x' for some incomplete type `X'.) */
4245 if (!DECL_EXTERNAL (decl))
4246 complete_type (type);
4247 if (!DECL_SIZE (decl)
4248 && TREE_TYPE (decl) != error_mark_node
4249 && (COMPLETE_TYPE_P (type)
4250 || (TREE_CODE (type) == ARRAY_TYPE
4251 && !TYPE_DOMAIN (type)
4252 && COMPLETE_TYPE_P (TREE_TYPE (type)))))
4253 layout_decl (decl, 0);
4255 if (!DECL_EXTERNAL (decl) && DECL_SIZE (decl) == NULL_TREE)
4257 /* An automatic variable with an incomplete type: that is an error.
4258 Don't talk about array types here, since we took care of that
4259 message in grokdeclarator. */
4260 error ("storage size of %qD isn't known", decl);
4261 TREE_TYPE (decl) = error_mark_node;
4264 /* Keep this code around in case we later want to control debug info
4265 based on whether a type is "used". (jason 1999-11-11) */
4267 else if (!DECL_EXTERNAL (decl) && IS_AGGR_TYPE (ttype))
4268 /* Let debugger know it should output info for this type. */
4269 note_debug_info_needed (ttype);
4271 if (TREE_STATIC (decl) && DECL_CLASS_SCOPE_P (decl))
4272 note_debug_info_needed (DECL_CONTEXT (decl));
4275 if ((DECL_EXTERNAL (decl) || TREE_STATIC (decl))
4276 && DECL_SIZE (decl) != NULL_TREE
4277 && ! TREE_CONSTANT (DECL_SIZE (decl)))
4279 if (TREE_CODE (DECL_SIZE (decl)) == INTEGER_CST)
4280 constant_expression_warning (DECL_SIZE (decl));
4282 error ("storage size of %qD isn't constant", decl);
4286 /* If a local static variable is declared in an inline function, or if
4287 we have a weak definition, we must endeavor to create only one
4288 instance of the variable at link-time. */
4291 maybe_commonize_var (tree decl)
4293 /* Static data in a function with comdat linkage also has comdat
4295 if (TREE_STATIC (decl)
4296 /* Don't mess with __FUNCTION__. */
4297 && ! DECL_ARTIFICIAL (decl)
4298 && DECL_FUNCTION_SCOPE_P (decl)
4299 /* Unfortunately, import_export_decl has not always been called
4300 before the function is processed, so we cannot simply check
4302 && (DECL_COMDAT (DECL_CONTEXT (decl))
4303 || ((DECL_DECLARED_INLINE_P (DECL_CONTEXT (decl))
4304 || DECL_TEMPLATE_INSTANTIATION (DECL_CONTEXT (decl)))
4305 && TREE_PUBLIC (DECL_CONTEXT (decl)))))
4309 /* With weak symbols, we simply make the variable COMDAT;
4310 that will cause copies in multiple translations units to
4312 comdat_linkage (decl);
4316 if (DECL_INITIAL (decl) == NULL_TREE
4317 || DECL_INITIAL (decl) == error_mark_node)
4319 /* Without weak symbols, we can use COMMON to merge
4320 uninitialized variables. */
4321 TREE_PUBLIC (decl) = 1;
4322 DECL_COMMON (decl) = 1;
4326 /* While for initialized variables, we must use internal
4327 linkage -- which means that multiple copies will not
4329 TREE_PUBLIC (decl) = 0;
4330 DECL_COMMON (decl) = 0;
4331 warning (0, "sorry: semantics of inline function static "
4332 "data %q+#D are wrong (you'll wind up "
4333 "with multiple copies)", decl);
4334 warning (0, "%J you can work around this by removing "
4340 else if (DECL_LANG_SPECIFIC (decl) && DECL_COMDAT (decl))
4341 /* Set it up again; we might have set DECL_INITIAL since the last
4343 comdat_linkage (decl);
4346 /* Issue an error message if DECL is an uninitialized const variable. */
4349 check_for_uninitialized_const_var (tree decl)
4351 tree type = TREE_TYPE (decl);
4353 /* ``Unless explicitly declared extern, a const object does not have
4354 external linkage and must be initialized. ($8.4; $12.1)'' ARM
4356 if (TREE_CODE (decl) == VAR_DECL
4357 && TREE_CODE (type) != REFERENCE_TYPE
4358 && CP_TYPE_CONST_P (type)
4359 && !TYPE_NEEDS_CONSTRUCTING (type)
4360 && !DECL_INITIAL (decl))
4361 error ("uninitialized const %qD", decl);
4365 /* Structure holding the current initializer being processed by reshape_init.
4366 CUR is a pointer to the current element being processed, END is a pointer
4367 after the last element present in the initializer. */
4368 typedef struct reshape_iterator_t
4370 constructor_elt *cur;
4371 constructor_elt *end;
4374 static tree reshape_init_r (tree, reshape_iter *, bool);
4376 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
4377 returned is the next FIELD_DECL (possibly FIELD itself) that can be
4378 initialized. If there are no more such fields, the return value
4382 next_initializable_field (tree field)
4385 && (TREE_CODE (field) != FIELD_DECL
4386 || (DECL_C_BIT_FIELD (field) && !DECL_NAME (field))
4387 || DECL_ARTIFICIAL (field)))
4388 field = TREE_CHAIN (field);
4393 /* Subroutine of reshape_init_array and reshape_init_vector, which does
4394 the actual work. ELT_TYPE is the element type of the array. MAX_INDEX is an
4395 INTEGER_CST representing the size of the array minus one (the maximum index),
4396 or NULL_TREE if the array was declared without specifying the size. D is
4397 the iterator within the constructor. */
4400 reshape_init_array_1 (tree elt_type, tree max_index, reshape_iter *d)
4403 bool sized_array_p = (max_index != NULL_TREE);
4404 unsigned HOST_WIDE_INT max_index_cst = 0;
4405 unsigned HOST_WIDE_INT index;
4407 /* The initializer for an array is always a CONSTRUCTOR. */
4408 new_init = build_constructor (NULL_TREE, NULL);
4412 /* Minus 1 is used for zero sized arrays. */
4413 if (integer_all_onesp (max_index))
4416 if (host_integerp (max_index, 1))
4417 max_index_cst = tree_low_cst (max_index, 1);
4418 /* sizetype is sign extended, not zero extended. */
4420 max_index_cst = tree_low_cst (fold_convert (size_type_node, max_index),
4424 /* Loop until there are no more initializers. */
4426 d->cur != d->end && (!sized_array_p || index <= max_index_cst);
4431 check_array_designated_initializer (d->cur);
4432 elt_init = reshape_init_r (elt_type, d, /*first_initializer_p=*/false);
4433 if (elt_init == error_mark_node)
4434 return error_mark_node;
4435 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init), NULL_TREE, elt_init);
4441 /* Subroutine of reshape_init_r, processes the initializers for arrays.
4442 Parameters are the same of reshape_init_r. */
4445 reshape_init_array (tree type, reshape_iter *d)
4447 tree max_index = NULL_TREE;
4449 gcc_assert (TREE_CODE (type) == ARRAY_TYPE);
4451 if (TYPE_DOMAIN (type))
4452 max_index = array_type_nelts (type);
4454 return reshape_init_array_1 (TREE_TYPE (type), max_index, d);
4457 /* Subroutine of reshape_init_r, processes the initializers for vectors.
4458 Parameters are the same of reshape_init_r. */
4461 reshape_init_vector (tree type, reshape_iter *d)
4463 tree max_index = NULL_TREE;
4466 gcc_assert (TREE_CODE (type) == VECTOR_TYPE);
4468 if (COMPOUND_LITERAL_P (d->cur->value))
4470 tree value = d->cur->value;
4471 if (!same_type_p (TREE_TYPE (value), type))
4473 error ("invalid type %qT as initializer for a vector of type %qT",
4474 TREE_TYPE (d->cur->value), type);
4475 value = error_mark_node;
4481 /* For a vector, the representation type is a struct
4482 containing a single member which is an array of the
4483 appropriate size. */
4484 rtype = TYPE_DEBUG_REPRESENTATION_TYPE (type);
4485 if (rtype && TYPE_DOMAIN (TREE_TYPE (TYPE_FIELDS (rtype))))
4486 max_index = array_type_nelts (TREE_TYPE (TYPE_FIELDS (rtype)));
4488 return reshape_init_array_1 (TREE_TYPE (type), max_index, d);
4491 /* Subroutine of reshape_init_r, processes the initializers for classes
4492 or union. Parameters are the same of reshape_init_r. */
4495 reshape_init_class (tree type, reshape_iter *d, bool first_initializer_p)
4500 gcc_assert (CLASS_TYPE_P (type));
4502 /* The initializer for a class is always a CONSTRUCTOR. */
4503 new_init = build_constructor (NULL_TREE, NULL);
4504 field = next_initializable_field (TYPE_FIELDS (type));
4510 An initializer for an aggregate member that is an
4511 empty class shall have the form of an empty
4512 initializer-list {}. */
4513 if (!first_initializer_p)
4515 error ("initializer for %qT must be brace-enclosed", type);
4516 return error_mark_node;
4521 /* Loop through the initializable fields, gathering initializers. */
4522 while (d->cur != d->end)
4526 /* Handle designated initializers, as an extension. */
4529 field = lookup_field_1 (type, d->cur->index, /*want_type=*/false);
4531 if (!field || TREE_CODE (field) != FIELD_DECL)
4533 error ("%qT has no non-static data member named %qD", type,
4535 return error_mark_node;
4539 /* If we processed all the member of the class, we are done. */
4543 field_init = reshape_init_r (TREE_TYPE (field), d,
4544 /*first_initializer_p=*/false);
4545 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init), field, field_init);
4549 When a union is initialized with a brace-enclosed
4550 initializer, the braces shall only contain an
4551 initializer for the first member of the union. */
4552 if (TREE_CODE (type) == UNION_TYPE)
4555 field = next_initializable_field (TREE_CHAIN (field));
4561 /* Subroutine of reshape_init, which processes a single initializer (part of
4562 a CONSTRUCTOR). TYPE is the type of the variable being initialized, D is the
4563 iterator within the CONSTRUCTOR which points to the initializer to process.
4564 FIRST_INITIALIZER_P is true if this is the first initializer of the
4565 CONSTRUCTOR node. */
4568 reshape_init_r (tree type, reshape_iter *d, bool first_initializer_p)
4570 tree init = d->cur->value;
4572 /* A non-aggregate type is always initialized with a single
4574 if (!CP_AGGREGATE_TYPE_P (type))
4576 /* It is invalid to initialize a non-aggregate type with a
4577 brace-enclosed initializer.
4578 We need to check for BRACE_ENCLOSED_INITIALIZER_P here because
4579 of g++.old-deja/g++.mike/p7626.C: a pointer-to-member constant is
4580 a CONSTRUCTOR (with a record type). */
4581 if (TREE_CODE (init) == CONSTRUCTOR
4582 && BRACE_ENCLOSED_INITIALIZER_P (init)) /* p7626.C */
4584 error ("braces around scalar initializer for type %qT", type);
4585 init = error_mark_node;
4594 All implicit type conversions (clause _conv_) are considered when
4595 initializing the aggregate member with an initializer from an
4596 initializer-list. If the initializer can initialize a member,
4597 the member is initialized. Otherwise, if the member is itself a
4598 non-empty subaggregate, brace elision is assumed and the
4599 initializer is considered for the initialization of the first
4600 member of the subaggregate. */
4601 if (TREE_CODE (init) != CONSTRUCTOR
4602 && can_convert_arg (type, TREE_TYPE (init), init, LOOKUP_NORMAL))
4608 /* [dcl.init.string]
4610 A char array (whether plain char, signed char, or unsigned char)
4611 can be initialized by a string-literal (optionally enclosed in
4612 braces); a wchar_t array can be initialized by a wide
4613 string-literal (optionally enclosed in braces). */
4614 if (TREE_CODE (type) == ARRAY_TYPE
4615 && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type))))
4617 tree str_init = init;
4619 /* Strip one level of braces if and only if they enclose a single
4620 element (as allowed by [dcl.init.string]). */
4621 if (!first_initializer_p
4622 && TREE_CODE (str_init) == CONSTRUCTOR
4623 && VEC_length (constructor_elt, CONSTRUCTOR_ELTS (str_init)) == 1)
4625 str_init = VEC_index (constructor_elt,
4626 CONSTRUCTOR_ELTS (str_init), 0)->value;
4629 /* If it's a string literal, then it's the initializer for the array
4630 as a whole. Otherwise, continue with normal initialization for
4631 array types (one value per array element). */
4632 if (TREE_CODE (str_init) == STRING_CST)
4639 /* The following cases are about aggregates. If we are not within a full
4640 initializer already, and there is not a CONSTRUCTOR, it means that there
4641 is a missing set of braces (that is, we are processing the case for
4642 which reshape_init exists). */
4643 if (!first_initializer_p)
4645 if (TREE_CODE (init) == CONSTRUCTOR)
4647 if (TREE_TYPE (init) && TYPE_PTRMEMFUNC_P (TREE_TYPE (init)))
4648 /* There is no need to reshape pointer-to-member function
4649 initializers, as they are always constructed correctly
4650 by the front end. */
4652 else if (COMPOUND_LITERAL_P (init))
4653 /* For a nested compound literal, there is no need to reshape since
4654 brace elision is not allowed. Even if we decided to allow it,
4655 we should add a call to reshape_init in finish_compound_literal,
4656 before calling digest_init, so changing this code would still
4657 not be necessary. */
4658 gcc_assert (!BRACE_ENCLOSED_INITIALIZER_P (init));
4662 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init));
4663 return reshape_init (type, init);
4667 warning (OPT_Wmissing_braces, "missing braces around initializer for %qT",
4671 /* Dispatch to specialized routines. */
4672 if (CLASS_TYPE_P (type))
4673 return reshape_init_class (type, d, first_initializer_p);
4674 else if (TREE_CODE (type) == ARRAY_TYPE)
4675 return reshape_init_array (type, d);
4676 else if (TREE_CODE (type) == VECTOR_TYPE)
4677 return reshape_init_vector (type, d);
4682 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
4683 brace-enclosed aggregate initializer.
4685 INIT is the CONSTRUCTOR containing the list of initializers describing
4686 a brace-enclosed initializer for an entity of the indicated aggregate TYPE.
4687 It may not presently match the shape of the TYPE; for example:
4689 struct S { int a; int b; };
4690 struct S a[] = { 1, 2, 3, 4 };
4692 Here INIT will hold a VEC of four elements, rather than a
4693 VEC of two elements, each itself a VEC of two elements. This
4694 routine transforms INIT from the former form into the latter. The
4695 revised CONSTRUCTOR node is returned. */
4698 reshape_init (tree type, tree init)
4700 VEC(constructor_elt, gc) *v;
4704 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init));
4706 v = CONSTRUCTOR_ELTS (init);
4708 /* An empty constructor does not need reshaping, and it is always a valid
4710 if (VEC_empty (constructor_elt, v))
4713 /* Recurse on this CONSTRUCTOR. */
4714 d.cur = VEC_index (constructor_elt, v, 0);
4715 d.end = d.cur + VEC_length (constructor_elt, v);
4717 new_init = reshape_init_r (type, &d, true);
4718 if (new_init == error_mark_node)
4719 return error_mark_node;
4721 /* Make sure all the element of the constructor were used. Otherwise,
4722 issue an error about exceeding initializers. */
4724 error ("too many initializers for %qT", type);
4729 /* Verify INIT (the initializer for DECL), and record the
4730 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
4731 grok_reference_init.
4733 If the return value is non-NULL, it is an expression that must be
4734 evaluated dynamically to initialize DECL. */
4737 check_initializer (tree decl, tree init, int flags, tree *cleanup)
4739 tree type = TREE_TYPE (decl);
4740 tree init_code = NULL;
4742 /* Things that are going to be initialized need to have complete
4744 TREE_TYPE (decl) = type = complete_type (TREE_TYPE (decl));
4746 if (type == error_mark_node)
4747 /* We will have already complained. */
4750 if (TREE_CODE (type) == ARRAY_TYPE)
4752 tree element_type = TREE_TYPE (type);
4754 /* The array type itself need not be complete, because the
4755 initializer may tell us how many elements are in the array.
4756 But, the elements of the array must be complete. */
4757 if (!COMPLETE_TYPE_P (complete_type (element_type)))
4759 error ("elements of array %q#D have incomplete type", decl);
4762 /* It is not valid to initialize a VLA. */
4764 && ((COMPLETE_TYPE_P (type) && !TREE_CONSTANT (TYPE_SIZE (type)))
4765 || !TREE_CONSTANT (TYPE_SIZE (element_type))))
4767 error ("variable-sized object %qD may not be initialized", decl);
4771 else if (!COMPLETE_TYPE_P (type))
4773 error ("%qD has incomplete type", decl);
4774 TREE_TYPE (decl) = error_mark_node;
4778 /* There is no way to make a variable-sized class type in GNU C++. */
4779 gcc_assert (TREE_CONSTANT (TYPE_SIZE (type)));
4781 if (!CP_AGGREGATE_TYPE_P (type)
4782 && init && BRACE_ENCLOSED_INITIALIZER_P (init)
4783 && VEC_length (constructor_elt, CONSTRUCTOR_ELTS (init)) != 1)
4785 error ("scalar object %qD requires one element in initializer", decl);
4786 TREE_TYPE (decl) = error_mark_node;
4790 if (TREE_CODE (decl) == CONST_DECL)
4792 gcc_assert (TREE_CODE (type) != REFERENCE_TYPE);
4794 DECL_INITIAL (decl) = init;
4796 gcc_assert (init != NULL_TREE);
4799 else if (!DECL_EXTERNAL (decl) && TREE_CODE (type) == REFERENCE_TYPE)
4800 init = grok_reference_init (decl, type, init, cleanup);
4803 /* Do not reshape constructors of vectors (they don't need to be
4805 if (TREE_CODE (init) == CONSTRUCTOR
4806 && !COMPOUND_LITERAL_P (init)
4807 && !TREE_TYPE (init)) /* ptrmemfunc */
4809 init = reshape_init (type, init);
4811 if ((*targetm.vector_opaque_p) (type))
4813 error ("opaque vector types cannot be initialized");
4814 init = error_mark_node;
4818 /* If DECL has an array type without a specific bound, deduce the
4819 array size from the initializer. */
4820 maybe_deduce_size_from_array_init (decl, init);
4821 type = TREE_TYPE (decl);
4822 if (type == error_mark_node)
4825 if (TYPE_HAS_CONSTRUCTOR (type) || TYPE_NEEDS_CONSTRUCTING (type))
4827 if (TREE_CODE (type) == ARRAY_TYPE)
4828 goto initialize_aggr;
4829 else if (TREE_CODE (init) == CONSTRUCTOR)
4831 if (TYPE_NON_AGGREGATE_CLASS (type))
4833 error ("%qD must be initialized by constructor, "
4836 init = error_mark_node;
4839 goto dont_use_constructor;
4843 int saved_stmts_are_full_exprs_p;
4846 saved_stmts_are_full_exprs_p = 0;
4847 if (building_stmt_tree ())
4849 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
4850 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
4852 init = build_aggr_init (decl, init, flags);
4853 if (building_stmt_tree ())
4854 current_stmt_tree ()->stmts_are_full_exprs_p =
4855 saved_stmts_are_full_exprs_p;
4861 dont_use_constructor:
4862 if (TREE_CODE (init) != TREE_VEC)
4864 init_code = store_init_value (decl, init);
4865 if (pedantic && TREE_CODE (type) == ARRAY_TYPE
4866 && DECL_INITIAL (decl)
4867 && TREE_CODE (DECL_INITIAL (decl)) == STRING_CST
4868 && PAREN_STRING_LITERAL_P (DECL_INITIAL (decl)))
4869 warning (0, "array %qD initialized by parenthesized string literal %qE",
4870 decl, DECL_INITIAL (decl));
4875 else if (DECL_EXTERNAL (decl))
4877 else if (TYPE_P (type) && TYPE_NEEDS_CONSTRUCTING (type))
4878 goto initialize_aggr;
4879 else if (IS_AGGR_TYPE (type))
4881 tree core_type = strip_array_types (type);
4883 if (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type))
4884 error ("structure %qD with uninitialized const members", decl);
4885 if (CLASSTYPE_REF_FIELDS_NEED_INIT (core_type))
4886 error ("structure %qD with uninitialized reference members", decl);
4888 check_for_uninitialized_const_var (decl);
4891 check_for_uninitialized_const_var (decl);
4893 if (init && init != error_mark_node)
4894 init_code = build2 (INIT_EXPR, type, decl, init);
4899 /* If DECL is not a local variable, give it RTL. */
4902 make_rtl_for_nonlocal_decl (tree decl, tree init, const char* asmspec)
4904 int toplev = toplevel_bindings_p ();
4906 const char *filename;
4908 /* Set the DECL_ASSEMBLER_NAME for the object. */
4911 /* The `register' keyword, when used together with an
4912 asm-specification, indicates that the variable should be
4913 placed in a particular register. */
4914 if (TREE_CODE (decl) == VAR_DECL && DECL_REGISTER (decl))
4916 set_user_assembler_name (decl, asmspec);
4917 DECL_HARD_REGISTER (decl) = 1;
4921 if (TREE_CODE (decl) == FUNCTION_DECL
4922 && DECL_BUILT_IN_CLASS (decl) == BUILT_IN_NORMAL)
4923 set_builtin_user_assembler_name (decl, asmspec);
4924 set_user_assembler_name (decl, asmspec);
4928 /* Handle non-variables up front. */
4929 if (TREE_CODE (decl) != VAR_DECL)
4931 rest_of_decl_compilation (decl, toplev, at_eof);
4935 /* If we see a class member here, it should be a static data
4937 if (DECL_LANG_SPECIFIC (decl) && DECL_IN_AGGR_P (decl))
4939 gcc_assert (TREE_STATIC (decl));
4940 /* An in-class declaration of a static data member should be
4941 external; it is only a declaration, and not a definition. */
4942 if (init == NULL_TREE)
4943 gcc_assert (DECL_EXTERNAL (decl));
4946 /* We don't create any RTL for local variables. */
4947 if (DECL_FUNCTION_SCOPE_P (decl) && !TREE_STATIC (decl))
4950 /* We defer emission of local statics until the corresponding
4951 DECL_EXPR is expanded. */
4952 defer_p = DECL_FUNCTION_SCOPE_P (decl) || DECL_VIRTUAL_P (decl);
4954 /* We try to defer namespace-scope static constants so that they are
4955 not emitted into the object file unnecessarily. */
4956 filename = input_filename;
4957 if (!DECL_VIRTUAL_P (decl)
4958 && TREE_READONLY (decl)
4959 && DECL_INITIAL (decl) != NULL_TREE
4960 && DECL_INITIAL (decl) != error_mark_node
4962 && ! EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl))
4964 && !TREE_PUBLIC (decl))
4966 /* Fool with the linkage of static consts according to #pragma
4968 struct c_fileinfo *finfo = get_fileinfo (filename);
4969 if (!finfo->interface_unknown && !TREE_PUBLIC (decl))
4971 TREE_PUBLIC (decl) = 1;
4972 DECL_EXTERNAL (decl) = finfo->interface_only;
4977 /* Likewise for template instantiations. */
4978 else if (DECL_LANG_SPECIFIC (decl)
4979 && DECL_IMPLICIT_INSTANTIATION (decl))
4982 /* If we're not deferring, go ahead and assemble the variable. */
4984 rest_of_decl_compilation (decl, toplev, at_eof);
4987 /* Generate code to initialize DECL (a local variable). */
4990 initialize_local_var (tree decl, tree init)
4992 tree type = TREE_TYPE (decl);
4995 gcc_assert (TREE_CODE (decl) == VAR_DECL
4996 || TREE_CODE (decl) == RESULT_DECL);
4997 gcc_assert (!TREE_STATIC (decl));
4999 if (DECL_SIZE (decl) == NULL_TREE)
5001 /* If we used it already as memory, it must stay in memory. */
5002 DECL_INITIAL (decl) = NULL_TREE;
5003 TREE_ADDRESSABLE (decl) = TREE_USED (decl);
5006 if (DECL_SIZE (decl) && type != error_mark_node)
5010 /* Compute and store the initial value. */
5011 already_used = TREE_USED (decl) || TREE_USED (type);
5013 /* Perform the initialization. */
5016 int saved_stmts_are_full_exprs_p;
5018 gcc_assert (building_stmt_tree ());
5019 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
5020 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
5021 finish_expr_stmt (init);
5022 current_stmt_tree ()->stmts_are_full_exprs_p =
5023 saved_stmts_are_full_exprs_p;
5026 /* Set this to 0 so we can tell whether an aggregate which was
5027 initialized was ever used. Don't do this if it has a
5028 destructor, so we don't complain about the 'resource
5029 allocation is initialization' idiom. Now set
5030 attribute((unused)) on types so decls of that type will be
5031 marked used. (see TREE_USED, above.) */
5032 if (TYPE_NEEDS_CONSTRUCTING (type)
5034 && TYPE_HAS_TRIVIAL_DESTRUCTOR (type)
5035 && DECL_NAME (decl))
5036 TREE_USED (decl) = 0;
5037 else if (already_used)
5038 TREE_USED (decl) = 1;
5041 /* Generate a cleanup, if necessary. */
5042 cleanup = cxx_maybe_build_cleanup (decl);
5043 if (DECL_SIZE (decl) && cleanup)
5044 finish_decl_cleanup (decl, cleanup);
5047 /* DECL is a VAR_DECL for a compiler-generated variable with static
5048 storage duration (like a virtual table) whose initializer is a
5049 compile-time constant. INIT must be either a TREE_LIST of values,
5050 or a CONSTRUCTOR. Initialize the variable and provide it to the
5054 initialize_artificial_var (tree decl, tree init)
5056 gcc_assert (DECL_ARTIFICIAL (decl));
5057 if (TREE_CODE (init) == TREE_LIST)
5058 init = build_constructor_from_list (NULL_TREE, init);
5059 gcc_assert (TREE_CODE (init) == CONSTRUCTOR);
5060 DECL_INITIAL (decl) = init;
5061 DECL_INITIALIZED_P (decl) = 1;
5062 determine_visibility (decl);
5063 layout_var_decl (decl);
5064 maybe_commonize_var (decl);
5065 make_rtl_for_nonlocal_decl (decl, init, /*asmspec=*/NULL);
5068 /* Finish processing of a declaration;
5069 install its line number and initial value.
5070 If the length of an array type is not known before,
5071 it must be determined now, from the initial value, or it is an error.
5073 INIT is the initializer (if any) for DECL. If INIT_CONST_EXPR_P is
5074 true, then INIT is an integral constant expression.
5076 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
5077 if the (init) syntax was used. */
5080 cp_finish_decl (tree decl, tree init, bool init_const_expr_p,
5081 tree asmspec_tree, int flags)
5085 const char *asmspec = NULL;
5086 int was_readonly = 0;
5087 bool var_definition_p = false;
5088 int saved_processing_template_decl;
5090 if (decl == error_mark_node)
5095 error ("assignment (not initialization) in declaration");
5099 gcc_assert (TREE_CODE (decl) != RESULT_DECL);
5100 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
5101 gcc_assert (TREE_CODE (decl) != PARM_DECL);
5103 type = TREE_TYPE (decl);
5104 if (type == error_mark_node)
5107 /* Assume no cleanup is required. */
5108 cleanup = NULL_TREE;
5109 saved_processing_template_decl = processing_template_decl;
5111 /* If a name was specified, get the string. */
5112 if (global_scope_p (current_binding_level))
5113 asmspec_tree = maybe_apply_renaming_pragma (decl, asmspec_tree);
5114 if (asmspec_tree && asmspec_tree != error_mark_node)
5115 asmspec = TREE_STRING_POINTER (asmspec_tree);
5117 if (current_class_type
5118 && CP_DECL_CONTEXT (decl) == current_class_type
5119 && TYPE_BEING_DEFINED (current_class_type)
5120 && (DECL_INITIAL (decl) || init))
5121 DECL_INITIALIZED_IN_CLASS_P (decl) = 1;
5123 if (processing_template_decl)
5125 bool type_dependent_p;
5127 /* Add this declaration to the statement-tree. */
5128 if (at_function_scope_p ())
5129 add_decl_expr (decl);
5131 type_dependent_p = dependent_type_p (type);
5133 if (init && init_const_expr_p)
5135 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl) = 1;
5136 if (DECL_INTEGRAL_CONSTANT_VAR_P (decl))
5137 TREE_CONSTANT (decl) = 1;
5141 || !DECL_CLASS_SCOPE_P (decl)
5142 || !DECL_INTEGRAL_CONSTANT_VAR_P (decl)
5144 || value_dependent_expression_p (init)
5145 /* Check also if initializer is a value dependent
5146 { integral_constant_expression }. */
5147 || (TREE_CODE (init) == CONSTRUCTOR
5148 && VEC_length (constructor_elt, CONSTRUCTOR_ELTS (init)) == 1
5149 && value_dependent_expression_p
5150 (VEC_index (constructor_elt,
5151 CONSTRUCTOR_ELTS (init), 0)->value)))
5154 DECL_INITIAL (decl) = init;
5155 if (TREE_CODE (decl) == VAR_DECL
5156 && !DECL_PRETTY_FUNCTION_P (decl)
5157 && !type_dependent_p)
5158 maybe_deduce_size_from_array_init (decl, init);
5162 init = fold_non_dependent_expr (init);
5163 processing_template_decl = 0;
5166 /* Take care of TYPE_DECLs up front. */
5167 if (TREE_CODE (decl) == TYPE_DECL)
5169 if (type != error_mark_node
5170 && IS_AGGR_TYPE (type) && DECL_NAME (decl))
5172 if (TREE_TYPE (DECL_NAME (decl)) && TREE_TYPE (decl) != type)
5173 warning (0, "shadowing previous type declaration of %q#D", decl);
5174 set_identifier_type_value (DECL_NAME (decl), decl);
5177 /* If we have installed this as the canonical typedef for this
5178 type, and that type has not been defined yet, delay emitting
5179 the debug information for it, as we will emit it later. */
5180 if (TYPE_MAIN_DECL (TREE_TYPE (decl)) == decl
5181 && !COMPLETE_TYPE_P (TREE_TYPE (decl)))
5182 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
5184 rest_of_decl_compilation (decl, DECL_CONTEXT (decl) == NULL_TREE,
5189 /* A reference will be modified here, as it is initialized. */
5190 if (! DECL_EXTERNAL (decl)
5191 && TREE_READONLY (decl)
5192 && TREE_CODE (type) == REFERENCE_TYPE)
5195 TREE_READONLY (decl) = 0;
5198 if (TREE_CODE (decl) == VAR_DECL)
5200 /* Only PODs can have thread-local storage. Other types may require
5201 various kinds of non-trivial initialization. */
5202 if (DECL_THREAD_LOCAL_P (decl) && !pod_type_p (TREE_TYPE (decl)))
5203 error ("%qD cannot be thread-local because it has non-POD type %qT",
5204 decl, TREE_TYPE (decl));
5205 /* If this is a local variable that will need a mangled name,
5206 register it now. We must do this before processing the
5207 initializer for the variable, since the initialization might
5208 require a guard variable, and since the mangled name of the
5209 guard variable will depend on the mangled name of this
5211 if (!processing_template_decl
5212 && DECL_FUNCTION_SCOPE_P (decl)
5213 && TREE_STATIC (decl)
5214 && !DECL_ARTIFICIAL (decl))
5215 push_local_name (decl);
5216 /* Convert the initializer to the type of DECL, if we have not
5217 already initialized DECL. */
5218 if (!DECL_INITIALIZED_P (decl)
5219 /* If !DECL_EXTERNAL then DECL is being defined. In the
5220 case of a static data member initialized inside the
5221 class-specifier, there can be an initializer even if DECL
5222 is *not* defined. */
5223 && (!DECL_EXTERNAL (decl) || init))
5227 DECL_NONTRIVIALLY_INITIALIZED_P (decl) = 1;
5228 if (init_const_expr_p)
5230 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl) = 1;
5231 if (DECL_INTEGRAL_CONSTANT_VAR_P (decl))
5232 TREE_CONSTANT (decl) = 1;
5235 init = check_initializer (decl, init, flags, &cleanup);
5236 /* Thread-local storage cannot be dynamically initialized. */
5237 if (DECL_THREAD_LOCAL_P (decl) && init)
5239 error ("%qD is thread-local and so cannot be dynamically "
5240 "initialized", decl);
5244 /* Check that the initializer for a static data member was a
5245 constant. Although we check in the parser that the
5246 initializer is an integral constant expression, we do not
5247 simplify division-by-zero at the point at which it
5248 occurs. Therefore, in:
5250 struct S { static const int i = 7 / 0; };
5252 we issue an error at this point. It would
5253 probably be better to forbid division by zero in
5254 integral constant expressions. */
5255 if (DECL_EXTERNAL (decl) && init)
5257 error ("%qD cannot be initialized by a non-constant expression"
5258 " when being declared", decl);
5259 DECL_INITIALIZED_IN_CLASS_P (decl) = 0;
5267 The memory occupied by any object of static storage
5268 duration is zero-initialized at program startup before
5269 any other initialization takes place.
5271 We cannot create an appropriate initializer until after
5272 the type of DECL is finalized. If DECL_INITIAL is set,
5273 then the DECL is statically initialized, and any
5274 necessary zero-initialization has already been performed. */
5275 if (TREE_STATIC (decl) && !DECL_INITIAL (decl))
5276 DECL_INITIAL (decl) = build_zero_init (TREE_TYPE (decl),
5277 /*nelts=*/NULL_TREE,
5278 /*static_storage_p=*/true);
5279 /* Remember that the initialization for this variable has
5281 DECL_INITIALIZED_P (decl) = 1;
5282 /* This declaration is the definition of this variable,
5283 unless we are initializing a static data member within
5284 the class specifier. */
5285 if (!DECL_EXTERNAL (decl))
5286 var_definition_p = true;
5288 /* If the variable has an array type, lay out the type, even if
5289 there is no initializer. It is valid to index through the
5290 array, and we must get TYPE_ALIGN set correctly on the array
5292 else if (TREE_CODE (type) == ARRAY_TYPE)
5296 /* Add this declaration to the statement-tree. This needs to happen
5297 after the call to check_initializer so that the DECL_EXPR for a
5298 reference temp is added before the DECL_EXPR for the reference itself. */
5299 if (at_function_scope_p ())
5300 add_decl_expr (decl);
5302 /* Let the middle end know about variables and functions -- but not
5303 static data members in uninstantiated class templates. */
5304 if (!saved_processing_template_decl
5305 && (TREE_CODE (decl) == VAR_DECL
5306 || TREE_CODE (decl) == FUNCTION_DECL))
5308 if (TREE_CODE (decl) == VAR_DECL)
5310 layout_var_decl (decl);
5311 maybe_commonize_var (decl);
5314 make_rtl_for_nonlocal_decl (decl, init, asmspec);
5316 /* Check for abstractness of the type. Notice that there is no
5317 need to strip array types here since the check for those types
5318 is already done within create_array_type_for_decl. */
5319 if (TREE_CODE (type) == FUNCTION_TYPE
5320 || TREE_CODE (type) == METHOD_TYPE)
5321 abstract_virtuals_error (decl, TREE_TYPE (type));
5323 abstract_virtuals_error (decl, type);
5325 /* This needs to happen after the linkage is set. */
5326 determine_visibility (decl);
5328 if (TREE_CODE (decl) == FUNCTION_DECL
5329 || TREE_TYPE (decl) == error_mark_node)
5330 /* No initialization required. */
5332 else if (DECL_EXTERNAL (decl)
5333 && ! (DECL_LANG_SPECIFIC (decl)
5334 && DECL_NOT_REALLY_EXTERN (decl)))
5337 DECL_INITIAL (decl) = init;
5341 /* A variable definition. */
5342 if (DECL_FUNCTION_SCOPE_P (decl))
5344 /* Initialize the local variable. */
5345 if (processing_template_decl)
5346 DECL_INITIAL (decl) = init;
5347 else if (!TREE_STATIC (decl))
5348 initialize_local_var (decl, init);
5351 /* If a variable is defined, and then a subsequent
5352 definition with external linkage is encountered, we will
5353 get here twice for the same variable. We want to avoid
5354 calling expand_static_init more than once. For variables
5355 that are not static data members, we can call
5356 expand_static_init only when we actually process the
5357 initializer. It is not legal to redeclare a static data
5358 member, so this issue does not arise in that case. */
5359 if (var_definition_p && TREE_STATIC (decl))
5361 /* If a TREE_READONLY variable needs initialization
5362 at runtime, it is no longer readonly and we need to
5363 avoid MEM_READONLY_P being set on RTL created for it. */
5364 if (init && TREE_READONLY (decl))
5365 TREE_READONLY (decl) = 0;
5366 expand_static_init (decl, init);
5371 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
5372 reference, insert it in the statement-tree now. */
5374 push_cleanup (decl, cleanup, false);
5377 processing_template_decl = saved_processing_template_decl;
5380 TREE_READONLY (decl) = 1;
5382 /* If this was marked 'used', be sure it will be output. */
5383 if (lookup_attribute ("used", DECL_ATTRIBUTES (decl)))
5384 mark_decl_referenced (decl);
5387 /* This is here for a midend callback from c-common.c. */
5390 finish_decl (tree decl, tree init, tree asmspec_tree)
5392 cp_finish_decl (decl, init, /*init_const_expr_p=*/false, asmspec_tree, 0);
5395 /* Returns a declaration for a VAR_DECL as if:
5397 extern "C" TYPE NAME;
5399 had been seen. Used to create compiler-generated global
5403 declare_global_var (tree name, tree type)
5407 push_to_top_level ();
5408 decl = build_decl (VAR_DECL, name, type);
5409 TREE_PUBLIC (decl) = 1;
5410 DECL_EXTERNAL (decl) = 1;
5411 DECL_ARTIFICIAL (decl) = 1;
5412 /* If the user has explicitly declared this variable (perhaps
5413 because the code we are compiling is part of a low-level runtime
5414 library), then it is possible that our declaration will be merged
5415 with theirs by pushdecl. */
5416 decl = pushdecl (decl);
5417 finish_decl (decl, NULL_TREE, NULL_TREE);
5418 pop_from_top_level ();
5423 /* Returns a pointer to the `atexit' function. Note that if
5424 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
5425 `__cxa_atexit' function specified in the IA64 C++ ABI. */
5428 get_atexit_node (void)
5435 bool use_aeabi_atexit;
5440 if (flag_use_cxa_atexit && !targetm.cxx.use_atexit_for_cxa_atexit ())
5442 /* The declaration for `__cxa_atexit' is:
5444 int __cxa_atexit (void (*)(void *), void *, void *)
5446 We build up the argument types and then then function type
5449 use_aeabi_atexit = targetm.cxx.use_aeabi_atexit ();
5450 /* First, build the pointer-to-function type for the first
5452 arg_types = tree_cons (NULL_TREE, ptr_type_node, void_list_node);
5453 fn_type = build_function_type (void_type_node, arg_types);
5454 fn_ptr_type = build_pointer_type (fn_type);
5455 /* Then, build the rest of the argument types. */
5456 arg_types = tree_cons (NULL_TREE, ptr_type_node, void_list_node);
5457 if (use_aeabi_atexit)
5459 arg_types = tree_cons (NULL_TREE, fn_ptr_type, arg_types);
5460 arg_types = tree_cons (NULL_TREE, ptr_type_node, arg_types);
5464 arg_types = tree_cons (NULL_TREE, ptr_type_node, arg_types);
5465 arg_types = tree_cons (NULL_TREE, fn_ptr_type, arg_types);
5467 /* And the final __cxa_atexit type. */
5468 fn_type = build_function_type (integer_type_node, arg_types);
5469 fn_ptr_type = build_pointer_type (fn_type);
5470 if (use_aeabi_atexit)
5471 name = "__aeabi_atexit";
5473 name = "__cxa_atexit";
5477 /* The declaration for `atexit' is:
5479 int atexit (void (*)());
5481 We build up the argument types and then then function type
5483 fn_type = build_function_type (void_type_node, void_list_node);
5484 fn_ptr_type = build_pointer_type (fn_type);
5485 arg_types = tree_cons (NULL_TREE, fn_ptr_type, void_list_node);
5486 /* Build the final atexit type. */
5487 fn_type = build_function_type (integer_type_node, arg_types);
5491 /* Now, build the function declaration. */
5492 push_lang_context (lang_name_c);
5493 atexit_fndecl = build_library_fn_ptr (name, fn_type);
5494 mark_used (atexit_fndecl);
5495 pop_lang_context ();
5496 atexit_node = decay_conversion (atexit_fndecl);
5501 /* Returns the __dso_handle VAR_DECL. */
5504 get_dso_handle_node (void)
5506 if (dso_handle_node)
5507 return dso_handle_node;
5509 /* Declare the variable. */
5510 dso_handle_node = declare_global_var (get_identifier ("__dso_handle"),
5513 return dso_handle_node;
5516 /* Begin a new function with internal linkage whose job will be simply
5517 to destroy some particular variable. */
5519 static GTY(()) int start_cleanup_cnt;
5522 start_cleanup_fn (void)
5528 bool use_cxa_atexit = flag_use_cxa_atexit
5529 && !targetm.cxx.use_atexit_for_cxa_atexit ();
5531 push_to_top_level ();
5533 /* No need to mangle this. */
5534 push_lang_context (lang_name_c);
5536 /* Build the parameter-types. */
5537 parmtypes = void_list_node;
5538 /* Functions passed to __cxa_atexit take an additional parameter.
5539 We'll just ignore it. After we implement the new calling
5540 convention for destructors, we can eliminate the use of
5541 additional cleanup functions entirely in the -fnew-abi case. */
5543 parmtypes = tree_cons (NULL_TREE, ptr_type_node, parmtypes);
5544 /* Build the function type itself. */
5545 fntype = build_function_type (void_type_node, parmtypes);
5546 /* Build the name of the function. */
5547 sprintf (name, "__tcf_%d", start_cleanup_cnt++);
5548 /* Build the function declaration. */
5549 fndecl = build_lang_decl (FUNCTION_DECL, get_identifier (name), fntype);
5550 /* It's a function with internal linkage, generated by the
5552 TREE_PUBLIC (fndecl) = 0;
5553 DECL_ARTIFICIAL (fndecl) = 1;
5554 /* Make the function `inline' so that it is only emitted if it is
5555 actually needed. It is unlikely that it will be inlined, since
5556 it is only called via a function pointer, but we avoid unnecessary
5557 emissions this way. */
5558 DECL_INLINE (fndecl) = 1;
5559 DECL_DECLARED_INLINE_P (fndecl) = 1;
5560 DECL_INTERFACE_KNOWN (fndecl) = 1;
5561 /* Build the parameter. */
5566 parmdecl = cp_build_parm_decl (NULL_TREE, ptr_type_node);
5567 DECL_CONTEXT (parmdecl) = fndecl;
5568 TREE_USED (parmdecl) = 1;
5569 DECL_ARGUMENTS (fndecl) = parmdecl;
5573 start_preparsed_function (fndecl, NULL_TREE, SF_PRE_PARSED);
5575 pop_lang_context ();
5577 return current_function_decl;
5580 /* Finish the cleanup function begun by start_cleanup_fn. */
5583 end_cleanup_fn (void)
5585 expand_or_defer_fn (finish_function (0));
5587 pop_from_top_level ();
5590 /* Generate code to handle the destruction of DECL, an object with
5591 static storage duration. */
5594 register_dtor_fn (tree decl)
5601 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
5602 return void_zero_node;
5604 /* Call build_cleanup before we enter the anonymous function so that
5605 any access checks will be done relative to the current scope,
5606 rather than the scope of the anonymous function. */
5607 build_cleanup (decl);
5609 /* Now start the function. */
5610 cleanup = start_cleanup_fn ();
5612 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
5613 to the original function, rather than the anonymous one. That
5614 will make the back end think that nested functions are in use,
5615 which causes confusion. */
5617 push_deferring_access_checks (dk_no_check);
5618 fcall = build_cleanup (decl);
5619 pop_deferring_access_checks ();
5621 /* Create the body of the anonymous function. */
5622 compound_stmt = begin_compound_stmt (BCS_FN_BODY);
5623 finish_expr_stmt (fcall);
5624 finish_compound_stmt (compound_stmt);
5627 /* Call atexit with the cleanup function. */
5628 cxx_mark_addressable (cleanup);
5629 mark_used (cleanup);
5630 cleanup = build_unary_op (ADDR_EXPR, cleanup, 0);
5631 if (flag_use_cxa_atexit && !targetm.cxx.use_atexit_for_cxa_atexit ())
5633 args = tree_cons (NULL_TREE,
5634 build_unary_op (ADDR_EXPR, get_dso_handle_node (), 0),
5636 if (targetm.cxx.use_aeabi_atexit ())
5638 args = tree_cons (NULL_TREE, cleanup, args);
5639 args = tree_cons (NULL_TREE, null_pointer_node, args);
5643 args = tree_cons (NULL_TREE, null_pointer_node, args);
5644 args = tree_cons (NULL_TREE, cleanup, args);
5648 args = tree_cons (NULL_TREE, cleanup, NULL_TREE);
5649 return build_function_call (get_atexit_node (), args);
5652 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
5653 is its initializer. Generate code to handle the construction
5654 and destruction of DECL. */
5657 expand_static_init (tree decl, tree init)
5659 gcc_assert (TREE_CODE (decl) == VAR_DECL);
5660 gcc_assert (TREE_STATIC (decl));
5662 /* Some variables require no initialization. */
5664 && !TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl))
5665 && TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
5668 if (DECL_FUNCTION_SCOPE_P (decl))
5670 /* Emit code to perform this initialization but once. */
5671 tree if_stmt = NULL_TREE, inner_if_stmt = NULL_TREE;
5672 tree then_clause = NULL_TREE, inner_then_clause = NULL_TREE;
5673 tree guard, guard_addr;
5674 tree acquire_fn, release_fn, abort_fn;
5677 /* Emit code to perform this initialization but once. This code
5680 static <type> guard;
5681 if (!guard.first_byte) {
5682 if (__cxa_guard_acquire (&guard)) {
5685 // Do initialization.
5686 flag = true; __cxa_guard_release (&guard);
5687 // Register variable for destruction at end of program.
5689 if (!flag) __cxa_guard_abort (&guard);
5693 Note that the `flag' variable is only set to 1 *after* the
5694 initialization is complete. This ensures that an exception,
5695 thrown during the construction, will cause the variable to
5696 reinitialized when we pass through this code again, as per:
5700 If the initialization exits by throwing an exception, the
5701 initialization is not complete, so it will be tried again
5702 the next time control enters the declaration.
5704 This process should be thread-safe, too; multiple threads
5705 should not be able to initialize the variable more than
5708 /* Create the guard variable. */
5709 guard = get_guard (decl);
5711 /* This optimization isn't safe on targets with relaxed memory
5712 consistency. On such targets we force synchronization in
5713 __cxa_guard_acquire. */
5714 if (!targetm.relaxed_ordering || !flag_threadsafe_statics)
5716 /* Begin the conditional initialization. */
5717 if_stmt = begin_if_stmt ();
5718 finish_if_stmt_cond (get_guard_cond (guard), if_stmt);
5719 then_clause = begin_compound_stmt (BCS_NO_SCOPE);
5722 if (flag_threadsafe_statics)
5724 guard_addr = build_address (guard);
5726 acquire_fn = get_identifier ("__cxa_guard_acquire");
5727 release_fn = get_identifier ("__cxa_guard_release");
5728 abort_fn = get_identifier ("__cxa_guard_abort");
5729 if (!get_global_value_if_present (acquire_fn, &acquire_fn))
5731 tree argtypes = tree_cons (NULL_TREE, TREE_TYPE (guard_addr),
5733 tree vfntype = build_function_type (void_type_node, argtypes);
5734 acquire_fn = push_library_fn
5735 (acquire_fn, build_function_type (integer_type_node, argtypes));
5736 release_fn = push_library_fn (release_fn, vfntype);
5737 abort_fn = push_library_fn (abort_fn, vfntype);
5741 release_fn = identifier_global_value (release_fn);
5742 abort_fn = identifier_global_value (abort_fn);
5745 inner_if_stmt = begin_if_stmt ();
5746 finish_if_stmt_cond (build_call_n (acquire_fn, 1, guard_addr),
5749 inner_then_clause = begin_compound_stmt (BCS_NO_SCOPE);
5750 begin = get_target_expr (boolean_false_node);
5751 flag = TARGET_EXPR_SLOT (begin);
5753 TARGET_EXPR_CLEANUP (begin)
5754 = build3 (COND_EXPR, void_type_node, flag,
5756 build_call_n (abort_fn, 1, guard_addr));
5757 CLEANUP_EH_ONLY (begin) = 1;
5759 /* Do the initialization itself. */
5760 init = add_stmt_to_compound (begin, init);
5761 init = add_stmt_to_compound
5762 (init, build2 (MODIFY_EXPR, void_type_node, flag, boolean_true_node));
5763 init = add_stmt_to_compound
5764 (init, build_call_n (release_fn, 1, guard_addr));
5767 init = add_stmt_to_compound (init, set_guard (guard));
5769 /* Use atexit to register a function for destroying this static
5771 init = add_stmt_to_compound (init, register_dtor_fn (decl));
5773 finish_expr_stmt (init);
5775 if (flag_threadsafe_statics)
5777 finish_compound_stmt (inner_then_clause);
5778 finish_then_clause (inner_if_stmt);
5779 finish_if_stmt (inner_if_stmt);
5782 if (!targetm.relaxed_ordering || !flag_threadsafe_statics)
5784 finish_compound_stmt (then_clause);
5785 finish_then_clause (if_stmt);
5786 finish_if_stmt (if_stmt);
5790 static_aggregates = tree_cons (init, decl, static_aggregates);
5794 /* Make TYPE a complete type based on INITIAL_VALUE.
5795 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
5796 2 if there was no information (in which case assume 0 if DO_DEFAULT),
5797 3 if the initializer list is empty (in pedantic mode). */
5800 cp_complete_array_type (tree *ptype, tree initial_value, bool do_default)
5803 tree type, elt_type;
5807 /* An array of character type can be initialized from a
5808 brace-enclosed string constant.
5810 FIXME: this code is duplicated from reshape_init. Probably
5811 we should just call reshape_init here? */
5812 if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (*ptype)))
5813 && TREE_CODE (initial_value) == CONSTRUCTOR
5814 && !VEC_empty (constructor_elt, CONSTRUCTOR_ELTS (initial_value)))
5816 VEC(constructor_elt,gc) *v = CONSTRUCTOR_ELTS (initial_value);
5817 tree value = VEC_index (constructor_elt, v, 0)->value;
5819 if (TREE_CODE (value) == STRING_CST
5820 && VEC_length (constructor_elt, v) == 1)
5821 initial_value = value;
5825 failure = complete_array_type (ptype, initial_value, do_default);
5827 /* We can create the array before the element type is complete, which
5828 means that we didn't have these two bits set in the original type
5829 either. In completing the type, we are expected to propagate these
5830 bits. See also complete_type which does the same thing for arrays
5833 if (TYPE_DOMAIN (type))
5835 elt_type = TREE_TYPE (type);
5836 TYPE_NEEDS_CONSTRUCTING (type) = TYPE_NEEDS_CONSTRUCTING (elt_type);
5837 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type)
5838 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (elt_type);
5844 /* Return zero if something is declared to be a member of type
5845 CTYPE when in the context of CUR_TYPE. STRING is the error
5846 message to print in that case. Otherwise, quietly return 1. */
5849 member_function_or_else (tree ctype, tree cur_type, enum overload_flags flags)
5851 if (ctype && ctype != cur_type)
5853 if (flags == DTOR_FLAG)
5854 error ("destructor for alien class %qT cannot be a member", ctype);
5856 error ("constructor for alien class %qT cannot be a member", ctype);
5862 /* Subroutine of `grokdeclarator'. */
5864 /* Generate errors possibly applicable for a given set of specifiers.
5865 This is for ARM $7.1.2. */
5868 bad_specifiers (tree object,
5877 error ("%qD declared as a %<virtual%> %s", object, type);
5879 error ("%qD declared as an %<inline%> %s", object, type);
5881 error ("%<const%> and %<volatile%> function specifiers on "
5882 "%qD invalid in %s declaration",
5885 error ("%q+D declared as a friend", object);
5887 && (TREE_CODE (object) == TYPE_DECL
5888 || (!TYPE_PTRFN_P (TREE_TYPE (object))
5889 && !TYPE_REFFN_P (TREE_TYPE (object))
5890 && !TYPE_PTRMEMFUNC_P (TREE_TYPE (object)))))
5891 error ("%q+D declared with an exception specification", object);
5894 /* DECL is a member function or static data member and is presently
5895 being defined. Check that the definition is taking place in a
5899 check_class_member_definition_namespace (tree decl)
5901 /* These checks only apply to member functions and static data
5903 gcc_assert (TREE_CODE (decl) == FUNCTION_DECL
5904 || TREE_CODE (decl) == VAR_DECL);
5905 /* We check for problems with specializations in pt.c in
5906 check_specialization_namespace, where we can issue better
5908 if (processing_specialization)
5910 /* There are no restrictions on the placement of
5911 explicit instantiations. */
5912 if (processing_explicit_instantiation)
5916 A member function definition that appears outside of the
5917 class definition shall appear in a namespace scope enclosing
5918 the class definition.
5922 The definition for a static data member shall appear in a
5923 namespace scope enclosing the member's class definition. */
5924 if (!is_ancestor (current_namespace, DECL_CONTEXT (decl)))
5925 pedwarn ("definition of %qD is not in namespace enclosing %qT",
5926 decl, DECL_CONTEXT (decl));
5929 /* Build a PARM_DECL for the "this" parameter. TYPE is the
5930 METHOD_TYPE for a non-static member function; QUALS are the
5931 cv-qualifiers that apply to the function. */
5934 build_this_parm (tree type, cp_cv_quals quals)
5939 cp_cv_quals this_quals;
5941 this_type = TREE_VALUE (TYPE_ARG_TYPES (type));
5942 /* The `this' parameter is implicitly `const'; it cannot be
5944 this_quals = (quals & TYPE_QUAL_RESTRICT) | TYPE_QUAL_CONST;
5945 qual_type = cp_build_qualified_type (this_type, this_quals);
5946 parm = build_artificial_parm (this_identifier, qual_type);
5947 cp_apply_type_quals_to_decl (this_quals, parm);
5951 /* CTYPE is class type, or null if non-class.
5952 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
5954 DECLARATOR is the function's name.
5955 PARMS is a chain of PARM_DECLs for the function.
5956 VIRTUALP is truthvalue of whether the function is virtual or not.
5957 FLAGS are to be passed through to `grokclassfn'.
5958 QUALS are qualifiers indicating whether the function is `const'
5960 RAISES is a list of exceptions that this function can raise.
5961 CHECK is 1 if we must find this method in CTYPE, 0 if we should
5962 not look, and -1 if we should not call `grokclassfn' at all.
5964 SFK is the kind of special function (if any) for the new function.
5966 Returns `NULL_TREE' if something goes wrong, after issuing
5967 applicable error messages. */
5970 grokfndecl (tree ctype,
5974 tree orig_declarator,
5976 enum overload_flags flags,
5983 special_function_kind sfk,
5990 int staticp = ctype && TREE_CODE (type) == FUNCTION_TYPE;
5994 type = build_exception_variant (type, raises);
5996 decl = build_lang_decl (FUNCTION_DECL, declarator, type);
5997 if (TREE_CODE (type) == METHOD_TYPE)
6000 parm = build_this_parm (type, quals);
6001 TREE_CHAIN (parm) = parms;
6004 DECL_ARGUMENTS (decl) = parms;
6005 /* Propagate volatile out from type to decl. */
6006 if (TYPE_VOLATILE (type))
6007 TREE_THIS_VOLATILE (decl) = 1;
6009 /* Setup decl according to sfk. */
6012 case sfk_constructor:
6013 case sfk_copy_constructor:
6014 DECL_CONSTRUCTOR_P (decl) = 1;
6016 case sfk_destructor:
6017 DECL_DESTRUCTOR_P (decl) = 1;
6024 && TREE_CODE (orig_declarator) == TEMPLATE_ID_EXPR)
6028 ("defining explicit specialization %qD in friend declaration",
6032 tree fns = TREE_OPERAND (orig_declarator, 0);
6033 tree args = TREE_OPERAND (orig_declarator, 1);
6035 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
6037 /* Something like `template <class T> friend void f<T>()'. */
6038 error ("invalid use of template-id %qD in declaration "
6039 "of primary template",
6045 /* A friend declaration of the form friend void f<>(). Record
6046 the information in the TEMPLATE_ID_EXPR. */
6047 SET_DECL_IMPLICIT_INSTANTIATION (decl);
6049 if (TREE_CODE (fns) == COMPONENT_REF)
6051 /* Due to bison parser ickiness, we will have already looked
6052 up an operator_name or PFUNCNAME within the current class
6053 (see template_id in parse.y). If the current class contains
6054 such a name, we'll get a COMPONENT_REF here. Undo that. */
6056 gcc_assert (TREE_TYPE (TREE_OPERAND (fns, 0))
6057 == current_class_type);
6058 fns = TREE_OPERAND (fns, 1);
6060 gcc_assert (TREE_CODE (fns) == IDENTIFIER_NODE
6061 || TREE_CODE (fns) == OVERLOAD);
6062 DECL_TEMPLATE_INFO (decl) = tree_cons (fns, args, NULL_TREE);
6064 for (t = TYPE_ARG_TYPES (TREE_TYPE (decl)); t; t = TREE_CHAIN (t))
6065 if (TREE_PURPOSE (t)
6066 && TREE_CODE (TREE_PURPOSE (t)) == DEFAULT_ARG)
6068 error ("default arguments are not allowed in declaration "
6069 "of friend template specialization %qD",
6076 error ("%<inline%> is not allowed in declaration of friend "
6077 "template specialization %qD",
6084 /* If this decl has namespace scope, set that up. */
6086 set_decl_namespace (decl, in_namespace, friendp);
6088 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
6090 /* `main' and builtins have implicit 'C' linkage. */
6091 if ((MAIN_NAME_P (declarator)
6092 || (IDENTIFIER_LENGTH (declarator) > 10
6093 && IDENTIFIER_POINTER (declarator)[0] == '_'
6094 && IDENTIFIER_POINTER (declarator)[1] == '_'
6095 && strncmp (IDENTIFIER_POINTER (declarator)+2, "builtin_", 8) == 0))
6096 && current_lang_name == lang_name_cplusplus
6097 && ctype == NULL_TREE
6098 /* NULL_TREE means global namespace. */
6099 && DECL_CONTEXT (decl) == NULL_TREE)
6100 SET_DECL_LANGUAGE (decl, lang_c);
6102 /* Should probably propagate const out from type to decl I bet (mrs). */
6105 DECL_STATIC_FUNCTION_P (decl) = 1;
6106 DECL_CONTEXT (decl) = ctype;
6111 DECL_CONTEXT (decl) = ctype;
6113 check_class_member_definition_namespace (decl);
6116 if (ctype == NULL_TREE && DECL_MAIN_P (decl))
6118 if (processing_template_decl)
6119 error ("cannot declare %<::main%> to be a template");
6121 error ("cannot declare %<::main%> to be inline");
6123 error ("cannot declare %<::main%> to be static");
6128 /* Members of anonymous types and local classes have no linkage; make
6129 them internal. If a typedef is made later, this will be changed. */
6130 if (ctype && (TYPE_ANONYMOUS_P (ctype)
6131 || decl_function_context (TYPE_MAIN_DECL (ctype))))
6136 /* [basic.link]: A name with no linkage (notably, the name of a class
6137 or enumeration declared in a local scope) shall not be used to
6138 declare an entity with linkage.
6140 Only check this for public decls for now. See core 319, 389. */
6141 t = no_linkage_check (TREE_TYPE (decl),
6142 /*relaxed_p=*/false);
6145 if (TYPE_ANONYMOUS_P (t))
6147 if (DECL_EXTERN_C_P (decl))
6148 /* Allow this; it's pretty common in C. */;
6151 pedwarn ("non-local function %q#D uses anonymous type",
6153 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
6154 pedwarn ("%q+#D does not refer to the unqualified "
6155 "type, so it is not used for linkage",
6160 pedwarn ("non-local function %q#D uses local type %qT", decl, t);
6164 TREE_PUBLIC (decl) = publicp;
6167 DECL_INTERFACE_KNOWN (decl) = 1;
6168 DECL_NOT_REALLY_EXTERN (decl) = 1;
6171 /* If the declaration was declared inline, mark it as such. */
6173 DECL_DECLARED_INLINE_P (decl) = 1;
6174 /* We inline functions that are explicitly declared inline, or, when
6175 the user explicitly asks us to, all functions. */
6176 if (DECL_DECLARED_INLINE_P (decl)
6177 || (flag_inline_trees == 2 && !DECL_INLINE (decl) && funcdef_flag))
6178 DECL_INLINE (decl) = 1;
6180 DECL_EXTERNAL (decl) = 1;
6181 if (quals && TREE_CODE (type) == FUNCTION_TYPE)
6184 ? G_("static member function %qD cannot have cv-qualifier")
6185 : G_("non-member function %qD cannot have cv-qualifier"),
6187 quals = TYPE_UNQUALIFIED;
6190 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl))
6191 && !grok_op_properties (decl, /*complain=*/true))
6194 if (ctype && decl_function_context (decl))
6195 DECL_NO_STATIC_CHAIN (decl) = 1;
6198 /* Make the init_value nonzero so pushdecl knows this is not
6199 tentative. error_mark_node is replaced later with the BLOCK. */
6200 DECL_INITIAL (decl) = error_mark_node;
6202 if (TYPE_NOTHROW_P (type) || nothrow_libfn_p (decl))
6203 TREE_NOTHROW (decl) = 1;
6205 /* Caller will do the rest of this. */
6209 if (ctype != NULL_TREE)
6210 grokclassfn (ctype, decl, flags);
6212 decl = check_explicit_specialization (orig_declarator, decl,
6215 4 * (friendp != 0));
6216 if (decl == error_mark_node)
6221 cplus_decl_attributes (&decl, *attrlist, 0);
6222 *attrlist = NULL_TREE;
6225 /* Check main's type after attributes have been applied. */
6226 if (ctype == NULL_TREE && DECL_MAIN_P (decl))
6228 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl)),
6231 tree oldtypeargs = TYPE_ARG_TYPES (TREE_TYPE (decl));
6233 error ("%<::main%> must return %<int%>");
6234 newtype = build_function_type (integer_type_node, oldtypeargs);
6235 TREE_TYPE (decl) = newtype;
6237 check_main_parameter_types (decl);
6240 if (ctype != NULL_TREE
6241 && (! TYPE_FOR_JAVA (ctype) || check_java_method (decl))
6246 old_decl = check_classfn (ctype, decl,
6247 (processing_template_decl
6248 > template_class_depth (ctype))
6249 ? current_template_parms
6256 if (TREE_CODE (old_decl) == TEMPLATE_DECL)
6257 /* Because grokfndecl is always supposed to return a
6258 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
6259 here. We depend on our callers to figure out that its
6260 really a template that's being returned. */
6261 old_decl = DECL_TEMPLATE_RESULT (old_decl);
6263 if (DECL_STATIC_FUNCTION_P (old_decl)
6264 && TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE)
6265 /* Remove the `this' parm added by grokclassfn.
6266 XXX Isn't this done in start_function, too? */
6267 revert_static_member_fn (decl);
6268 if (DECL_ARTIFICIAL (old_decl))
6269 error ("definition of implicitly-declared %qD", old_decl);
6271 /* Since we've smashed OLD_DECL to its
6272 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
6273 if (TREE_CODE (decl) == TEMPLATE_DECL)
6274 decl = DECL_TEMPLATE_RESULT (decl);
6276 /* Attempt to merge the declarations. This can fail, in
6277 the case of some invalid specialization declarations. */
6278 pushed_scope = push_scope (ctype);
6279 ok = duplicate_decls (decl, old_decl, friendp);
6281 pop_scope (pushed_scope);
6284 error ("no %q#D member function declared in class %qT",
6292 if (DECL_CONSTRUCTOR_P (decl) && !grok_ctor_properties (ctype, decl))
6295 if (ctype == NULL_TREE || check)
6299 DECL_VIRTUAL_P (decl) = 1;
6304 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
6305 the linkage that DECL will receive in the object file. */
6308 set_linkage_for_static_data_member (tree decl)
6310 /* A static data member always has static storage duration and
6311 external linkage. Note that static data members are forbidden in
6312 local classes -- the only situation in which a class has
6313 non-external linkage. */
6314 TREE_PUBLIC (decl) = 1;
6315 TREE_STATIC (decl) = 1;
6316 /* For non-template classes, static data members are always put
6317 out in exactly those files where they are defined, just as
6318 with ordinary namespace-scope variables. */
6319 if (!processing_template_decl)
6320 DECL_INTERFACE_KNOWN (decl) = 1;
6323 /* Create a VAR_DECL named NAME with the indicated TYPE.
6325 If SCOPE is non-NULL, it is the class type or namespace containing
6326 the variable. If SCOPE is NULL, the variable should is created in
6327 the innermost enclosings scope. */
6330 grokvardecl (tree type,
6332 const cp_decl_specifier_seq *declspecs,
6338 tree explicit_scope;
6340 gcc_assert (!name || TREE_CODE (name) == IDENTIFIER_NODE);
6342 /* Compute the scope in which to place the variable, but remember
6343 whether or not that scope was explicitly specified by the user. */
6344 explicit_scope = scope;
6347 /* An explicit "extern" specifier indicates a namespace-scope
6349 if (declspecs->storage_class == sc_extern)
6350 scope = current_namespace;
6351 else if (!at_function_scope_p ())
6352 scope = current_scope ();
6356 && (/* If the variable is a namespace-scope variable declared in a
6357 template, we need DECL_LANG_SPECIFIC. */
6358 (TREE_CODE (scope) == NAMESPACE_DECL && processing_template_decl)
6359 /* Similarly for namespace-scope variables with language linkage
6361 || (TREE_CODE (scope) == NAMESPACE_DECL
6362 && current_lang_name != lang_name_cplusplus)
6363 /* Similarly for static data members. */
6365 decl = build_lang_decl (VAR_DECL, name, type);
6367 decl = build_decl (VAR_DECL, name, type);
6369 if (explicit_scope && TREE_CODE (explicit_scope) == NAMESPACE_DECL)
6370 set_decl_namespace (decl, explicit_scope, 0);
6372 DECL_CONTEXT (decl) = FROB_CONTEXT (scope);
6374 if (declspecs->storage_class == sc_extern)
6376 DECL_THIS_EXTERN (decl) = 1;
6377 DECL_EXTERNAL (decl) = !initialized;
6380 if (DECL_CLASS_SCOPE_P (decl))
6382 set_linkage_for_static_data_member (decl);
6383 /* This function is only called with out-of-class definitions. */
6384 DECL_EXTERNAL (decl) = 0;
6385 check_class_member_definition_namespace (decl);
6387 /* At top level, either `static' or no s.c. makes a definition
6388 (perhaps tentative), and absence of `static' makes it public. */
6389 else if (toplevel_bindings_p ())
6391 TREE_PUBLIC (decl) = (declspecs->storage_class != sc_static
6392 && (DECL_THIS_EXTERN (decl) || ! constp));
6393 TREE_STATIC (decl) = ! DECL_EXTERNAL (decl);
6395 /* Not at top level, only `static' makes a static definition. */
6398 TREE_STATIC (decl) = declspecs->storage_class == sc_static;
6399 TREE_PUBLIC (decl) = DECL_EXTERNAL (decl);
6402 if (declspecs->specs[(int)ds_thread])
6403 DECL_TLS_MODEL (decl) = decl_default_tls_model (decl);
6405 if (TREE_PUBLIC (decl))
6407 /* [basic.link]: A name with no linkage (notably, the name of a class
6408 or enumeration declared in a local scope) shall not be used to
6409 declare an entity with linkage.
6411 Only check this for public decls for now. */
6412 tree t = no_linkage_check (TREE_TYPE (decl), /*relaxed_p=*/false);
6415 if (TYPE_ANONYMOUS_P (t))
6417 if (DECL_EXTERN_C_P (decl))
6418 /* Allow this; it's pretty common in C. */
6422 /* DRs 132, 319 and 389 seem to indicate types with
6423 no linkage can only be used to declare extern "C"
6424 entities. Since it's not always an error in the
6425 ISO C++ 90 Standard, we only issue a warning. */
6426 warning (0, "non-local variable %q#D uses anonymous type",
6428 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
6429 warning (0, "%q+#D does not refer to the unqualified "
6430 "type, so it is not used for linkage",
6435 warning (0, "non-local variable %q#D uses local type %qT", decl, t);
6439 DECL_INTERFACE_KNOWN (decl) = 1;
6444 /* Create and return a canonical pointer to member function type, for
6445 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
6448 build_ptrmemfunc_type (tree type)
6452 tree unqualified_variant = NULL_TREE;
6454 if (type == error_mark_node)
6457 /* If a canonical type already exists for this type, use it. We use
6458 this method instead of type_hash_canon, because it only does a
6459 simple equality check on the list of field members. */
6461 if ((t = TYPE_GET_PTRMEMFUNC_TYPE (type)))
6464 /* Make sure that we always have the unqualified pointer-to-member
6466 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
6468 = build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type));
6470 t = make_aggr_type (RECORD_TYPE);
6471 xref_basetypes (t, NULL_TREE);
6473 /* Let the front end know this is a pointer to member function... */
6474 TYPE_PTRMEMFUNC_FLAG (t) = 1;
6475 /* ... and not really an aggregate. */
6476 SET_IS_AGGR_TYPE (t, 0);
6478 field = build_decl (FIELD_DECL, pfn_identifier, type);
6481 field = build_decl (FIELD_DECL, delta_identifier, delta_type_node);
6482 TREE_CHAIN (field) = fields;
6485 finish_builtin_struct (t, "__ptrmemfunc_type", fields, ptr_type_node);
6487 /* Zap out the name so that the back end will give us the debugging
6488 information for this anonymous RECORD_TYPE. */
6489 TYPE_NAME (t) = NULL_TREE;
6491 /* If this is not the unqualified form of this pointer-to-member
6492 type, set the TYPE_MAIN_VARIANT for this type to be the
6493 unqualified type. Since they are actually RECORD_TYPEs that are
6494 not variants of each other, we must do this manually. */
6495 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
6497 t = build_qualified_type (t, cp_type_quals (type));
6498 TYPE_MAIN_VARIANT (t) = unqualified_variant;
6499 TYPE_NEXT_VARIANT (t) = TYPE_NEXT_VARIANT (unqualified_variant);
6500 TYPE_NEXT_VARIANT (unqualified_variant) = t;
6503 /* Cache this pointer-to-member type so that we can find it again
6505 TYPE_SET_PTRMEMFUNC_TYPE (type, t);
6507 if (TYPE_STRUCTURAL_EQUALITY_P (type))
6508 SET_TYPE_STRUCTURAL_EQUALITY (t);
6509 else if (TYPE_CANONICAL (type) != type)
6510 TYPE_CANONICAL (t) = build_ptrmemfunc_type (TYPE_CANONICAL (type));
6515 /* Create and return a pointer to data member type. */
6518 build_ptrmem_type (tree class_type, tree member_type)
6520 if (TREE_CODE (member_type) == METHOD_TYPE)
6524 arg_types = TYPE_ARG_TYPES (member_type);
6525 class_type = (cp_build_qualified_type
6527 cp_type_quals (TREE_TYPE (TREE_VALUE (arg_types)))));
6529 = build_method_type_directly (class_type,
6530 TREE_TYPE (member_type),
6531 TREE_CHAIN (arg_types));
6532 return build_ptrmemfunc_type (build_pointer_type (member_type));
6536 gcc_assert (TREE_CODE (member_type) != FUNCTION_TYPE);
6537 return build_offset_type (class_type, member_type);
6541 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
6542 Check to see that the definition is valid. Issue appropriate error
6543 messages. Return 1 if the definition is particularly bad, or 0
6547 check_static_variable_definition (tree decl, tree type)
6549 /* Motion 10 at San Diego: If a static const integral data member is
6550 initialized with an integral constant expression, the initializer
6551 may appear either in the declaration (within the class), or in
6552 the definition, but not both. If it appears in the class, the
6553 member is a member constant. The file-scope definition is always
6555 if (!ARITHMETIC_TYPE_P (type) && TREE_CODE (type) != ENUMERAL_TYPE)
6557 error ("invalid in-class initialization of static data member "
6558 "of non-integral type %qT",
6560 /* If we just return the declaration, crashes will sometimes
6561 occur. We therefore return void_type_node, as if this were a
6562 friend declaration, to cause callers to completely ignore
6563 this declaration. */
6566 else if (!CP_TYPE_CONST_P (type))
6567 error ("ISO C++ forbids in-class initialization of non-const "
6568 "static member %qD",
6570 else if (pedantic && !INTEGRAL_TYPE_P (type))
6571 pedwarn ("ISO C++ forbids initialization of member constant "
6572 "%qD of non-integral type %qT", decl, type);
6577 /* Given the SIZE (i.e., number of elements) in an array, compute an
6578 appropriate index type for the array. If non-NULL, NAME is the
6579 name of the thing being declared. */
6582 compute_array_index_type (tree name, tree size)
6586 tree abi_1_itype = NULL_TREE;
6588 if (error_operand_p (size))
6589 return error_mark_node;
6591 type = TREE_TYPE (size);
6592 /* The array bound must be an integer type. */
6593 if (!dependent_type_p (type) && !INTEGRAL_TYPE_P (type))
6596 error ("size of array %qD has non-integral type %qT", name, type);
6598 error ("size of array has non-integral type %qT", type);
6599 size = integer_one_node;
6600 type = TREE_TYPE (size);
6603 if (value_dependent_expression_p (size))
6605 /* We cannot do any checking for a value-dependent SIZE. Just
6606 build the index type and mark that it requires structural
6608 itype = build_index_type (build_min (MINUS_EXPR, sizetype,
6609 size, integer_one_node));
6610 SET_TYPE_STRUCTURAL_EQUALITY (itype);
6614 if (!abi_version_at_least (2) && processing_template_decl)
6615 /* For abi-1, we handled all instances in templates the same way,
6616 even when they were non-dependent. This effects the manglings
6617 produced. So, we do the normal checking for non-dependent
6618 sizes, but at the end we'll return the same type that abi-1
6619 would have, but with TYPE_CANONICAL set to the "right"
6620 value that the current ABI would provide. */
6621 abi_1_itype = build_index_type (build_min (MINUS_EXPR, sizetype,
6622 size, integer_one_node));
6624 /* The size might be the result of a cast. */
6625 STRIP_TYPE_NOPS (size);
6627 /* It might be a const variable or enumeration constant. */
6628 size = integral_constant_value (size);
6630 /* Normally, the array-bound will be a constant. */
6631 if (TREE_CODE (size) == INTEGER_CST)
6633 /* Check to see if the array bound overflowed. Make that an
6634 error, no matter how generous we're being. */
6635 int old_flag_pedantic_errors = flag_pedantic_errors;
6636 int old_pedantic = pedantic;
6637 pedantic = flag_pedantic_errors = 1;
6638 constant_expression_warning (size);
6639 pedantic = old_pedantic;
6640 flag_pedantic_errors = old_flag_pedantic_errors;
6642 /* An array must have a positive number of elements. */
6643 if (INT_CST_LT (size, integer_zero_node))
6646 error ("size of array %qD is negative", name);
6648 error ("size of array is negative");
6649 size = integer_one_node;
6651 /* As an extension we allow zero-sized arrays. We always allow
6652 them in system headers because glibc uses them. */
6653 else if (integer_zerop (size) && pedantic && !in_system_header)
6656 pedwarn ("ISO C++ forbids zero-size array %qD", name);
6658 pedwarn ("ISO C++ forbids zero-size array");
6661 else if (TREE_CONSTANT (size))
6663 /* `(int) &fn' is not a valid array bound. */
6665 error ("size of array %qD is not an integral constant-expression",
6668 error ("size of array is not an integral constant-expression");
6669 size = integer_one_node;
6671 else if (pedantic && warn_vla != 0)
6674 pedwarn ("ISO C++ forbids variable length array %qD", name);
6676 pedwarn ("ISO C++ forbids variable length array");
6678 else if (warn_vla > 0)
6682 "variable length array %qD is used", name);
6685 "variable length array is used");
6688 if (processing_template_decl && !TREE_CONSTANT (size))
6689 /* A variable sized array. */
6690 itype = build_min (MINUS_EXPR, sizetype, size, integer_one_node);
6693 HOST_WIDE_INT saved_processing_template_decl;
6695 /* Compute the index of the largest element in the array. It is
6696 one less than the number of elements in the array. We save
6697 and restore PROCESSING_TEMPLATE_DECL so that computations in
6698 cp_build_binary_op will be appropriately folded. */
6699 saved_processing_template_decl = processing_template_decl;
6700 processing_template_decl = 0;
6701 itype = cp_build_binary_op (MINUS_EXPR,
6702 cp_convert (ssizetype, size),
6703 cp_convert (ssizetype, integer_one_node));
6704 itype = fold (itype);
6705 processing_template_decl = saved_processing_template_decl;
6707 if (!TREE_CONSTANT (itype))
6708 /* A variable sized array. */
6709 itype = variable_size (itype);
6710 /* Make sure that there was no overflow when creating to a signed
6711 index type. (For example, on a 32-bit machine, an array with
6712 size 2^32 - 1 is too big.) */
6713 else if (TREE_CODE (itype) == INTEGER_CST
6714 && TREE_OVERFLOW (itype))
6716 error ("overflow in array dimension");
6717 TREE_OVERFLOW (itype) = 0;
6721 /* Create and return the appropriate index type. */
6724 tree t = build_index_type (itype);
6725 TYPE_CANONICAL (abi_1_itype) = TYPE_CANONICAL (t);
6729 return build_index_type (itype);
6732 /* Returns the scope (if any) in which the entity declared by
6733 DECLARATOR will be located. If the entity was declared with an
6734 unqualified name, NULL_TREE is returned. */
6737 get_scope_of_declarator (const cp_declarator *declarator)
6739 while (declarator && declarator->kind != cdk_id)
6740 declarator = declarator->declarator;
6742 /* If the declarator-id is a SCOPE_REF, the scope in which the
6743 declaration occurs is the first operand. */
6745 && declarator->u.id.qualifying_scope)
6746 return declarator->u.id.qualifying_scope;
6748 /* Otherwise, the declarator is not a qualified name; the entity will
6749 be declared in the current scope. */
6753 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
6754 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
6758 create_array_type_for_decl (tree name, tree type, tree size)
6760 tree itype = NULL_TREE;
6761 const char* error_msg;
6763 /* If things have already gone awry, bail now. */
6764 if (type == error_mark_node || size == error_mark_node)
6765 return error_mark_node;
6767 /* Assume that everything will go OK. */
6770 /* There are some types which cannot be array elements. */
6771 switch (TREE_CODE (type))
6774 error_msg = "array of void";
6778 error_msg = "array of functions";
6781 case REFERENCE_TYPE:
6782 error_msg = "array of references";
6786 error_msg = "array of function members";
6793 /* If something went wrong, issue an error-message and return. */
6797 error ("declaration of %qD as %s", name, error_msg);
6799 error ("creating %s", error_msg);
6801 return error_mark_node;
6806 The constant expressions that specify the bounds of the arrays
6807 can be omitted only for the first member of the sequence. */
6808 if (TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type))
6811 error ("declaration of %qD as multidimensional array must "
6812 "have bounds for all dimensions except the first",
6815 error ("multidimensional array must have bounds for all "
6816 "dimensions except the first");
6818 return error_mark_node;
6821 /* Figure out the index type for the array. */
6823 itype = compute_array_index_type (name, size);
6826 T is called the array element type; this type shall not be [...] an
6827 abstract class type. */
6828 abstract_virtuals_error (name, type);
6830 return build_cplus_array_type (type, itype);
6833 /* Check that it's OK to declare a function with the indicated TYPE.
6834 SFK indicates the kind of special function (if any) that this
6835 function is. OPTYPE is the type given in a conversion operator
6836 declaration, or the class type for a constructor/destructor.
6837 Returns the actual return type of the function; that
6838 may be different than TYPE if an error occurs, or for certain
6839 special functions. */
6842 check_special_function_return_type (special_function_kind sfk,
6848 case sfk_constructor:
6850 error ("return type specification for constructor invalid");
6852 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
6853 type = build_pointer_type (optype);
6855 type = void_type_node;
6858 case sfk_destructor:
6860 error ("return type specification for destructor invalid");
6861 /* We can't use the proper return type here because we run into
6862 problems with ambiguous bases and covariant returns.
6863 Java classes are left unchanged because (void *) isn't a valid
6864 Java type, and we don't want to change the Java ABI. */
6865 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
6866 type = build_pointer_type (void_type_node);
6868 type = void_type_node;
6871 case sfk_conversion:
6872 if (type && !same_type_p (type, optype))
6873 error ("operator %qT declared to return %qT", optype, type);
6875 pedwarn ("return type specified for %<operator %T%>", optype);
6886 /* A variable or data member (whose unqualified name is IDENTIFIER)
6887 has been declared with the indicated TYPE. If the TYPE is not
6888 acceptable, issue an error message and return a type to use for
6889 error-recovery purposes. */
6892 check_var_type (tree identifier, tree type)
6894 if (VOID_TYPE_P (type))
6897 error ("unnamed variable or field declared void");
6898 else if (TREE_CODE (identifier) == IDENTIFIER_NODE)
6900 gcc_assert (!IDENTIFIER_OPNAME_P (identifier));
6901 error ("variable or field %qE declared void", identifier);
6904 error ("variable or field declared void");
6905 type = error_mark_node;
6911 /* Given declspecs and a declarator (abstract or otherwise), determine
6912 the name and type of the object declared and construct a DECL node
6915 DECLSPECS points to the representation of declaration-specifier
6916 sequence that precedes declarator.
6918 DECL_CONTEXT says which syntactic context this declaration is in:
6919 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
6920 FUNCDEF for a function definition. Like NORMAL but a few different
6921 error messages in each case. Return value may be zero meaning
6922 this definition is too screwy to try to parse.
6923 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
6924 handle member functions (which have FIELD context).
6925 Return value may be zero meaning this definition is too screwy to
6927 PARM for a parameter declaration (either within a function prototype
6928 or before a function body). Make a PARM_DECL, or return void_type_node.
6929 CATCHPARM for a parameter declaration before a catch clause.
6930 TYPENAME if for a typename (in a cast or sizeof).
6931 Don't make a DECL node; just return the ..._TYPE node.
6932 FIELD for a struct or union field; make a FIELD_DECL.
6933 BITFIELD for a field with specified width.
6934 INITIALIZED is 1 if the decl has an initializer.
6936 ATTRLIST is a pointer to the list of attributes, which may be NULL
6937 if there are none; *ATTRLIST may be modified if attributes from inside
6938 the declarator should be applied to the declaration.
6940 When this function is called, scoping variables (such as
6941 CURRENT_CLASS_TYPE) should reflect the scope in which the
6942 declaration occurs, not the scope in which the new declaration will
6943 be placed. For example, on:
6947 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
6950 Returns a DECL (if a declarator is present), a TYPE (if there is no
6951 declarator, in cases like "struct S;"), or the ERROR_MARK_NODE if an
6955 grokdeclarator (const cp_declarator *declarator,
6956 const cp_decl_specifier_seq *declspecs,
6957 enum decl_context decl_context,
6961 tree type = NULL_TREE;
6963 int virtualp, explicitp, friendp, inlinep, staticp;
6964 int explicit_int = 0;
6965 int explicit_char = 0;
6966 int defaulted_int = 0;
6967 tree dependent_name = NULL_TREE;
6969 tree typedef_decl = NULL_TREE;
6970 const char *name = NULL;
6971 tree typedef_type = NULL_TREE;
6972 /* True if this declarator is a function definition. */
6973 bool funcdef_flag = false;
6974 cp_declarator_kind innermost_code = cdk_error;
6977 /* See the code below that used this. */
6978 tree decl_attr = NULL_TREE;
6981 /* Keep track of what sort of function is being processed
6982 so that we can warn about default return values, or explicit
6983 return values which do not match prescribed defaults. */
6984 special_function_kind sfk = sfk_none;
6986 tree dname = NULL_TREE;
6987 tree ctor_return_type = NULL_TREE;
6988 enum overload_flags flags = NO_SPECIAL;
6989 /* cv-qualifiers that apply to the declarator, for a declaration of
6990 a member function. */
6991 cp_cv_quals memfn_quals = TYPE_UNQUALIFIED;
6992 /* cv-qualifiers that apply to the type specified by the DECLSPECS. */
6994 tree raises = NULL_TREE;
6995 int template_count = 0;
6996 tree returned_attrs = NULL_TREE;
6997 tree parms = NULL_TREE;
6998 const cp_declarator *id_declarator;
6999 /* The unqualified name of the declarator; either an
7000 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
7001 tree unqualified_id;
7002 /* The class type, if any, in which this entity is located,
7003 or NULL_TREE if none. Note that this value may be different from
7004 the current class type; for example if an attempt is made to declare
7005 "A::f" inside "B", this value will be "A". */
7006 tree ctype = current_class_type;
7007 /* The NAMESPACE_DECL for the namespace in which this entity is
7008 located. If an unqualified name is used to declare the entity,
7009 this value will be NULL_TREE, even if the entity is located at
7011 tree in_namespace = NULL_TREE;
7012 cp_storage_class storage_class;
7013 bool unsigned_p, signed_p, short_p, long_p, thread_p;
7014 bool type_was_error_mark_node = false;
7015 bool parameter_pack_p = declarator? declarator->parameter_pack_p : false;
7016 bool set_no_warning = false;
7018 signed_p = declspecs->specs[(int)ds_signed];
7019 unsigned_p = declspecs->specs[(int)ds_unsigned];
7020 short_p = declspecs->specs[(int)ds_short];
7021 long_p = declspecs->specs[(int)ds_long];
7022 longlong = declspecs->specs[(int)ds_long] >= 2;
7023 thread_p = declspecs->specs[(int)ds_thread];
7025 if (decl_context == FUNCDEF)
7026 funcdef_flag = true, decl_context = NORMAL;
7027 else if (decl_context == MEMFUNCDEF)
7028 funcdef_flag = true, decl_context = FIELD;
7029 else if (decl_context == BITFIELD)
7030 bitfield = 1, decl_context = FIELD;
7032 /* Look inside a declarator for the name being declared
7033 and get it as a string, for an error message. */
7034 for (id_declarator = declarator;
7036 id_declarator = id_declarator->declarator)
7038 if (id_declarator->kind != cdk_id)
7039 innermost_code = id_declarator->kind;
7041 switch (id_declarator->kind)
7044 if (id_declarator->declarator
7045 && id_declarator->declarator->kind == cdk_id)
7047 sfk = id_declarator->declarator->u.id.sfk;
7048 if (sfk == sfk_destructor)
7055 tree qualifying_scope = id_declarator->u.id.qualifying_scope;
7056 tree decl = id_declarator->u.id.unqualified_name;
7059 if (qualifying_scope)
7061 if (at_function_scope_p ())
7065 A declarator-id shall not be qualified except
7068 None of the cases are permitted in block
7070 if (qualifying_scope == global_namespace)
7071 error ("invalid use of qualified-name %<::%D%>",
7073 else if (TYPE_P (qualifying_scope))
7074 error ("invalid use of qualified-name %<%T::%D%>",
7075 qualifying_scope, decl);
7077 error ("invalid use of qualified-name %<%D::%D%>",
7078 qualifying_scope, decl);
7079 return error_mark_node;
7081 else if (TYPE_P (qualifying_scope))
7083 ctype = qualifying_scope;
7084 if (innermost_code != cdk_function
7085 && current_class_type
7086 && !UNIQUELY_DERIVED_FROM_P (ctype,
7087 current_class_type))
7089 error ("type %qT is not derived from type %qT",
7090 ctype, current_class_type);
7091 return error_mark_node;
7094 else if (TREE_CODE (qualifying_scope) == NAMESPACE_DECL)
7095 in_namespace = qualifying_scope;
7097 switch (TREE_CODE (decl))
7103 if (innermost_code != cdk_function)
7105 error ("declaration of %qD as non-function", decl);
7106 return error_mark_node;
7108 else if (!qualifying_scope
7109 && !(current_class_type && at_class_scope_p ()))
7111 error ("declaration of %qD as non-member", decl);
7112 return error_mark_node;
7115 type = TREE_OPERAND (decl, 0);
7116 name = IDENTIFIER_POINTER (constructor_name (type));
7121 case TEMPLATE_ID_EXPR:
7123 tree fns = TREE_OPERAND (decl, 0);
7126 if (TREE_CODE (dname) != IDENTIFIER_NODE)
7128 gcc_assert (is_overloaded_fn (dname));
7129 dname = DECL_NAME (get_first_fn (dname));
7134 case IDENTIFIER_NODE:
7135 if (TREE_CODE (decl) == IDENTIFIER_NODE)
7138 if (C_IS_RESERVED_WORD (dname))
7140 error ("declarator-id missing; using reserved word %qD",
7142 name = IDENTIFIER_POINTER (dname);
7144 else if (!IDENTIFIER_TYPENAME_P (dname))
7145 name = IDENTIFIER_POINTER (dname);
7148 gcc_assert (flags == NO_SPECIAL);
7149 flags = TYPENAME_FLAG;
7150 ctor_return_type = TREE_TYPE (dname);
7151 sfk = sfk_conversion;
7152 if (is_typename_at_global_scope (dname))
7153 name = IDENTIFIER_POINTER (dname);
7155 name = "<invalid operator>";
7171 return error_mark_node;
7177 if (id_declarator->kind == cdk_id)
7183 The declarator in a function-definition shall have the form
7184 D1 ( parameter-declaration-clause) ... */
7185 if (funcdef_flag && innermost_code != cdk_function)
7187 error ("function definition does not declare parameters");
7188 return error_mark_node;
7191 if (((dname && IDENTIFIER_OPNAME_P (dname)) || flags == TYPENAME_FLAG)
7192 && innermost_code != cdk_function
7193 && ! (ctype && !declspecs->any_specifiers_p))
7195 error ("declaration of %qD as non-function", dname);
7196 return error_mark_node;
7199 /* Anything declared one level down from the top level
7200 must be one of the parameters of a function
7201 (because the body is at least two levels down). */
7203 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
7204 by not allowing C++ class definitions to specify their parameters
7205 with xdecls (must be spec.d in the parmlist).
7207 Since we now wait to push a class scope until we are sure that
7208 we are in a legitimate method context, we must set oldcname
7209 explicitly (since current_class_name is not yet alive).
7211 We also want to avoid calling this a PARM if it is in a namespace. */
7213 if (decl_context == NORMAL && !toplevel_bindings_p ())
7215 struct cp_binding_level *b = current_binding_level;
7216 current_binding_level = b->level_chain;
7217 if (current_binding_level != 0 && toplevel_bindings_p ())
7218 decl_context = PARM;
7219 current_binding_level = b;
7223 name = decl_context == PARM ? "parameter" : "type name";
7225 /* If there were multiple types specified in the decl-specifier-seq,
7226 issue an error message. */
7227 if (declspecs->multiple_types_p)
7229 error ("two or more data types in declaration of %qs", name);
7230 return error_mark_node;
7233 /* Extract the basic type from the decl-specifier-seq. */
7234 type = declspecs->type;
7235 if (type == error_mark_node)
7238 type_was_error_mark_node = true;
7240 /* If the entire declaration is itself tagged as deprecated then
7241 suppress reports of deprecated items. */
7242 if (type && TREE_DEPRECATED (type)
7243 && deprecated_state != DEPRECATED_SUPPRESS)
7244 warn_deprecated_use (type);
7245 if (type && TREE_CODE (type) == TYPE_DECL)
7247 typedef_decl = type;
7248 type = TREE_TYPE (typedef_decl);
7250 /* No type at all: default to `int', and set DEFAULTED_INT
7251 because it was not a user-defined typedef. */
7252 if (type == NULL_TREE && (signed_p || unsigned_p || long_p || short_p))
7254 /* These imply 'int'. */
7255 type = integer_type_node;
7259 explicit_int = declspecs->explicit_int_p;
7260 explicit_char = declspecs->explicit_char_p;
7263 /* See the code below that used this. */
7265 decl_attr = DECL_ATTRIBUTES (typedef_decl);
7267 typedef_type = type;
7270 if (sfk != sfk_conversion)
7271 ctor_return_type = ctype;
7273 if (sfk != sfk_none)
7274 type = check_special_function_return_type (sfk, type,
7276 else if (type == NULL_TREE)
7282 /* We handle `main' specially here, because 'main () { }' is so
7283 common. With no options, it is allowed. With -Wreturn-type,
7284 it is a warning. It is only an error with -pedantic-errors. */
7285 is_main = (funcdef_flag
7286 && dname && MAIN_NAME_P (dname)
7287 && ctype == NULL_TREE
7288 && in_namespace == NULL_TREE
7289 && current_namespace == global_namespace);
7291 if (type_was_error_mark_node)
7292 /* We've already issued an error, don't complain more. */;
7293 else if (in_system_header || flag_ms_extensions)
7294 /* Allow it, sigh. */;
7295 else if (pedantic || ! is_main)
7296 pedwarn ("ISO C++ forbids declaration of %qs with no type", name);
7298 warning (OPT_Wreturn_type,
7299 "ISO C++ forbids declaration of %qs with no type", name);
7301 type = integer_type_node;
7306 /* Now process the modifiers that were specified
7307 and check for invalid combinations. */
7309 /* Long double is a special combination. */
7310 if (long_p && !longlong && TYPE_MAIN_VARIANT (type) == double_type_node)
7313 type = build_qualified_type (long_double_type_node,
7314 cp_type_quals (type));
7317 /* Check all other uses of type modifiers. */
7319 if (unsigned_p || signed_p || long_p || short_p)
7323 if ((signed_p || unsigned_p) && TREE_CODE (type) != INTEGER_TYPE)
7324 error ("%<signed%> or %<unsigned%> invalid for %qs", name);
7325 else if (signed_p && unsigned_p)
7326 error ("%<signed%> and %<unsigned%> specified together for %qs", name);
7327 else if (longlong && TREE_CODE (type) != INTEGER_TYPE)
7328 error ("%<long long%> invalid for %qs", name);
7329 else if (long_p && TREE_CODE (type) == REAL_TYPE)
7330 error ("%<long%> invalid for %qs", name);
7331 else if (short_p && TREE_CODE (type) == REAL_TYPE)
7332 error ("%<short%> invalid for %qs", name);
7333 else if ((long_p || short_p) && TREE_CODE (type) != INTEGER_TYPE)
7334 error ("%<long%> or %<short%> invalid for %qs", name);
7335 else if ((long_p || short_p) && explicit_char)
7336 error ("%<long%> or %<short%> specified with char for %qs", name);
7337 else if (long_p && short_p)
7338 error ("%<long%> and %<short%> specified together for %qs", name);
7342 if (!explicit_int && !defaulted_int && !explicit_char && pedantic)
7344 pedwarn ("long, short, signed or unsigned used invalidly for %qs",
7346 if (flag_pedantic_errors)
7351 /* Discard the type modifiers if they are invalid. */
7362 /* Decide whether an integer type is signed or not.
7363 Optionally treat bitfields as signed by default. */
7367 It is implementation-defined whether a plain (neither
7368 explicitly signed or unsigned) char, short, int, or long
7369 bit-field is signed or unsigned.
7371 Naturally, we extend this to long long as well. Note that
7372 this does not include wchar_t. */
7373 || (bitfield && !flag_signed_bitfields
7375 /* A typedef for plain `int' without `signed' can be
7376 controlled just like plain `int', but a typedef for
7377 `signed int' cannot be so controlled. */
7379 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl))
7380 && TREE_CODE (type) == INTEGER_TYPE
7381 && !same_type_p (TYPE_MAIN_VARIANT (type), wchar_type_node)))
7384 type = long_long_unsigned_type_node;
7386 type = long_unsigned_type_node;
7388 type = short_unsigned_type_node;
7389 else if (type == char_type_node)
7390 type = unsigned_char_type_node;
7391 else if (typedef_decl)
7392 type = unsigned_type_for (type);
7394 type = unsigned_type_node;
7396 else if (signed_p && type == char_type_node)
7397 type = signed_char_type_node;
7399 type = long_long_integer_type_node;
7401 type = long_integer_type_node;
7403 type = short_integer_type_node;
7405 if (declspecs->specs[(int)ds_complex])
7407 if (TREE_CODE (type) != INTEGER_TYPE && TREE_CODE (type) != REAL_TYPE)
7408 error ("complex invalid for %qs", name);
7409 /* If we just have "complex", it is equivalent to
7410 "complex double", but if any modifiers at all are specified it is
7411 the complex form of TYPE. E.g, "complex short" is
7412 "complex short int". */
7414 else if (defaulted_int && ! longlong
7415 && ! (long_p || short_p || signed_p || unsigned_p))
7416 type = complex_double_type_node;
7417 else if (type == integer_type_node)
7418 type = complex_integer_type_node;
7419 else if (type == float_type_node)
7420 type = complex_float_type_node;
7421 else if (type == double_type_node)
7422 type = complex_double_type_node;
7423 else if (type == long_double_type_node)
7424 type = complex_long_double_type_node;
7426 type = build_complex_type (type);
7429 type_quals = TYPE_UNQUALIFIED;
7430 if (declspecs->specs[(int)ds_const])
7431 type_quals |= TYPE_QUAL_CONST;
7432 if (declspecs->specs[(int)ds_volatile])
7433 type_quals |= TYPE_QUAL_VOLATILE;
7434 if (declspecs->specs[(int)ds_restrict])
7435 type_quals |= TYPE_QUAL_RESTRICT;
7436 if (sfk == sfk_conversion && type_quals != TYPE_UNQUALIFIED)
7437 error ("qualifiers are not allowed on declaration of %<operator %T%>",
7440 if (TREE_CODE (type) == FUNCTION_TYPE
7441 && type_quals != TYPE_UNQUALIFIED)
7443 /* This was an error in C++98 (cv-qualifiers cannot be added to
7444 a function type), but DR 295 makes the code well-formed by
7445 dropping the extra qualifiers. */
7448 tree bad_type = build_qualified_type (type, type_quals);
7449 pedwarn ("ignoring %qV qualifiers added to function type %qT",
7452 type_quals = TYPE_UNQUALIFIED;
7454 type_quals |= cp_type_quals (type);
7455 type = cp_build_qualified_type_real
7456 (type, type_quals, ((typedef_decl && !DECL_ARTIFICIAL (typedef_decl)
7457 ? tf_ignore_bad_quals : 0) | tf_warning_or_error));
7458 /* We might have ignored or rejected some of the qualifiers. */
7459 type_quals = cp_type_quals (type);
7462 inlinep = !! declspecs->specs[(int)ds_inline];
7463 virtualp = !! declspecs->specs[(int)ds_virtual];
7464 explicitp = !! declspecs->specs[(int)ds_explicit];
7466 storage_class = declspecs->storage_class;
7467 if (storage_class == sc_static)
7468 staticp = 1 + (decl_context == FIELD);
7470 if (virtualp && staticp == 2)
7472 error ("member %qD cannot be declared both virtual and static", dname);
7473 storage_class = sc_none;
7476 friendp = !! declspecs->specs[(int)ds_friend];
7478 if (dependent_name && !friendp)
7480 error ("%<%T::%D%> is not a valid declarator", ctype, dependent_name);
7481 return error_mark_node;
7484 /* Issue errors about use of storage classes for parameters. */
7485 if (decl_context == PARM)
7487 if (declspecs->specs[(int)ds_typedef])
7489 error ("typedef declaration invalid in parameter declaration");
7490 return error_mark_node;
7492 else if (storage_class == sc_static
7493 || storage_class == sc_extern
7495 error ("storage class specifiers invalid in parameter declarations");
7498 /* Give error if `virtual' is used outside of class declaration. */
7500 && (current_class_name == NULL_TREE || decl_context != FIELD))
7502 error ("virtual outside class declaration");
7506 /* Static anonymous unions are dealt with here. */
7507 if (staticp && decl_context == TYPENAME
7509 && ANON_AGGR_TYPE_P (declspecs->type))
7510 decl_context = FIELD;
7512 /* Warn about storage classes that are invalid for certain
7513 kinds of declarations (parameters, typenames, etc.). */
7516 && storage_class != sc_extern
7517 && storage_class != sc_static)
7518 || declspecs->specs[(int)ds_typedef]))
7520 error ("multiple storage classes in declaration of %qs", name);
7523 if (declspecs->conflicting_specifiers_p)
7525 error ("conflicting specifiers in declaration of %qs", name);
7526 storage_class = sc_none;
7528 else if (decl_context != NORMAL
7529 && ((storage_class != sc_none
7530 && storage_class != sc_mutable)
7533 if ((decl_context == PARM || decl_context == CATCHPARM)
7534 && (storage_class == sc_register
7535 || storage_class == sc_auto))
7537 else if (declspecs->specs[(int)ds_typedef])
7539 else if (decl_context == FIELD
7540 /* C++ allows static class elements. */
7541 && storage_class == sc_static)
7542 /* C++ also allows inlines and signed and unsigned elements,
7543 but in those cases we don't come in here. */
7547 if (decl_context == FIELD)
7548 error ("storage class specified for %qs", name);
7551 if (decl_context == PARM || decl_context == CATCHPARM)
7552 error ("storage class specified for parameter %qs", name);
7554 error ("storage class specified for typename");
7556 if (storage_class == sc_register
7557 || storage_class == sc_auto
7558 || storage_class == sc_extern
7560 storage_class = sc_none;
7563 else if (storage_class == sc_extern && initialized
7566 if (toplevel_bindings_p ())
7568 /* It's common practice (and completely valid) to have a const
7569 be initialized and declared extern. */
7570 if (!(type_quals & TYPE_QUAL_CONST))
7571 warning (0, "%qs initialized and declared %<extern%>", name);
7574 error ("%qs has both %<extern%> and initializer", name);
7576 else if (storage_class == sc_extern && funcdef_flag
7577 && ! toplevel_bindings_p ())
7578 error ("nested function %qs declared %<extern%>", name);
7579 else if (toplevel_bindings_p ())
7581 if (storage_class == sc_auto)
7582 error ("top-level declaration of %qs specifies %<auto%>", name);
7585 && storage_class != sc_extern
7586 && storage_class != sc_static)
7588 error ("function-scope %qs implicitly auto and declared %<__thread%>",
7593 if (storage_class && friendp)
7594 error ("storage class specifiers invalid in friend function declarations");
7597 unqualified_id = NULL_TREE;
7600 unqualified_id = id_declarator->u.id.unqualified_name;
7601 switch (TREE_CODE (unqualified_id))
7605 = constructor_name (TREE_OPERAND (unqualified_id, 0));
7608 case IDENTIFIER_NODE:
7609 case TEMPLATE_ID_EXPR:
7617 /* Determine the type of the entity declared by recurring on the
7619 for (; declarator; declarator = declarator->declarator)
7621 const cp_declarator *inner_declarator;
7624 if (type == error_mark_node)
7625 return error_mark_node;
7627 attrs = declarator->attributes;
7633 if (declarator == NULL || declarator->kind == cdk_id)
7634 attr_flags |= (int) ATTR_FLAG_DECL_NEXT;
7635 if (declarator->kind == cdk_function)
7636 attr_flags |= (int) ATTR_FLAG_FUNCTION_NEXT;
7637 if (declarator->kind == cdk_array)
7638 attr_flags |= (int) ATTR_FLAG_ARRAY_NEXT;
7639 returned_attrs = decl_attributes (&type,
7640 chainon (returned_attrs, attrs),
7644 if (declarator->kind == cdk_id)
7647 inner_declarator = declarator->declarator;
7649 switch (declarator->kind)
7652 type = create_array_type_for_decl (dname, type,
7653 declarator->u.array.bounds);
7661 /* Declaring a function type.
7662 Make sure we have a valid type for the function to return. */
7664 if (type_quals != TYPE_UNQUALIFIED)
7666 if (SCALAR_TYPE_P (type) || VOID_TYPE_P (type))
7667 warning (OPT_Wreturn_type,
7668 "type qualifiers ignored on function return type");
7669 /* We now know that the TYPE_QUALS don't apply to the
7670 decl, but to its return type. */
7671 type_quals = TYPE_UNQUALIFIED;
7672 set_no_warning = true;
7675 /* Warn about some types functions can't return. */
7677 if (TREE_CODE (type) == FUNCTION_TYPE)
7679 error ("%qs declared as function returning a function", name);
7680 type = integer_type_node;
7682 if (TREE_CODE (type) == ARRAY_TYPE)
7684 error ("%qs declared as function returning an array", name);
7685 type = integer_type_node;
7688 /* Pick up type qualifiers which should be applied to `this'. */
7689 memfn_quals = declarator->u.function.qualifiers;
7691 /* Pick up the exception specifications. */
7692 raises = declarator->u.function.exception_specification;
7694 /* Say it's a definition only for the CALL_EXPR
7695 closest to the identifier. */
7696 funcdecl_p = inner_declarator && inner_declarator->kind == cdk_id;
7698 if (ctype == NULL_TREE
7699 && decl_context == FIELD
7701 && (friendp == 0 || dname == current_class_name))
7702 ctype = current_class_type;
7704 if (ctype && (sfk == sfk_constructor
7705 || sfk == sfk_destructor))
7707 /* We are within a class's scope. If our declarator name
7708 is the same as the class name, and we are defining
7709 a function, then it is a constructor/destructor, and
7710 therefore returns a void type. */
7712 /* ISO C++ 12.4/2. A destructor may not be declared
7713 const or volatile. A destructor may not be
7716 ISO C++ 12.1. A constructor may not be declared
7717 const or volatile. A constructor may not be
7718 virtual. A constructor may not be static. */
7720 error ((flags == DTOR_FLAG)
7721 ? "destructor cannot be static member function"
7722 : "constructor cannot be static member function");
7725 error ((flags == DTOR_FLAG)
7726 ? "destructors may not be cv-qualified"
7727 : "constructors may not be cv-qualified");
7728 memfn_quals = TYPE_UNQUALIFIED;
7731 if (decl_context == FIELD
7732 && !member_function_or_else (ctype,
7735 return error_mark_node;
7737 if (flags != DTOR_FLAG)
7739 /* It's a constructor. */
7744 pedwarn ("constructors cannot be declared virtual");
7747 if (decl_context == FIELD
7748 && sfk != sfk_constructor)
7749 return error_mark_node;
7751 if (decl_context == FIELD)
7757 error ("can't initialize friend function %qs", name);
7760 /* Cannot be both friend and virtual. */
7761 error ("virtual functions cannot be friends");
7764 if (decl_context == NORMAL)
7765 error ("friend declaration not in class definition");
7766 if (current_function_decl && funcdef_flag)
7767 error ("can't define friend function %qs in a local "
7772 arg_types = grokparms (declarator->u.function.parameters,
7775 if (inner_declarator
7776 && inner_declarator->kind == cdk_id
7777 && inner_declarator->u.id.sfk == sfk_destructor
7778 && arg_types != void_list_node)
7780 error ("destructors may not have parameters");
7781 arg_types = void_list_node;
7785 type = build_function_type (type, arg_types);
7792 /* Filter out pointers-to-references and references-to-references.
7793 We can get these if a TYPE_DECL is used. */
7795 if (TREE_CODE (type) == REFERENCE_TYPE)
7797 if (declarator->kind != cdk_reference)
7799 error ("cannot declare pointer to %q#T", type);
7800 type = TREE_TYPE (type);
7803 /* In C++0x, we allow reference to reference declarations
7804 that occur indirectly through typedefs [7.1.3/8 dcl.typedef]
7805 and template type arguments [14.3.1/4 temp.arg.type]. The
7806 check for direct reference to reference declarations, which
7807 are still forbidden, occurs below. Reasoning behind the change
7808 can be found in DR106, DR540, and the rvalue reference
7810 else if (!flag_cpp0x)
7812 error ("cannot declare reference to %q#T", type);
7813 type = TREE_TYPE (type);
7816 else if (VOID_TYPE_P (type))
7818 if (declarator->kind == cdk_reference)
7819 error ("cannot declare reference to %q#T", type);
7820 else if (declarator->kind == cdk_ptrmem)
7821 error ("cannot declare pointer to %q#T member", type);
7824 /* We now know that the TYPE_QUALS don't apply to the decl,
7825 but to the target of the pointer. */
7826 type_quals = TYPE_UNQUALIFIED;
7828 if (declarator->kind == cdk_ptrmem
7829 && (TREE_CODE (type) == FUNCTION_TYPE || memfn_quals))
7831 memfn_quals |= cp_type_quals (type);
7832 type = build_memfn_type (type,
7833 declarator->u.pointer.class_type,
7835 memfn_quals = TYPE_UNQUALIFIED;
7838 if (declarator->kind == cdk_reference)
7840 /* In C++0x, the type we are creating a reference to might be
7841 a typedef which is itself a reference type. In that case,
7842 we follow the reference collapsing rules in
7843 [7.1.3/8 dcl.typedef] to create the final reference type:
7845 "If a typedef TD names a type that is a reference to a type
7846 T, an attempt to create the type 'lvalue reference to cv TD'
7847 creates the type 'lvalue reference to T,' while an attempt
7848 to create the type "rvalue reference to cv TD' creates the
7851 if (!VOID_TYPE_P (type))
7852 type = cp_build_reference_type
7853 ((TREE_CODE (type) == REFERENCE_TYPE
7854 ? TREE_TYPE (type) : type),
7855 (declarator->u.reference.rvalue_ref
7856 && (TREE_CODE(type) != REFERENCE_TYPE
7857 || TYPE_REF_IS_RVALUE (type))));
7859 /* In C++0x, we need this check for direct reference to
7860 reference declarations, which are forbidden by
7861 [8.3.2/5 dcl.ref]. Reference to reference declarations
7862 are only allowed indirectly through typedefs and template
7863 type arguments. Example:
7865 void foo(int & &); // invalid ref-to-ref decl
7867 typedef int & int_ref;
7868 void foo(int_ref &); // valid ref-to-ref decl
7870 if (inner_declarator && inner_declarator->kind == cdk_reference)
7871 error ("cannot declare reference to %q#T, which is not "
7872 "a typedef or a template type argument", type);
7874 else if (TREE_CODE (type) == METHOD_TYPE)
7875 type = build_ptrmemfunc_type (build_pointer_type (type));
7876 else if (declarator->kind == cdk_ptrmem)
7878 gcc_assert (TREE_CODE (declarator->u.pointer.class_type)
7880 if (declarator->u.pointer.class_type == error_mark_node)
7881 /* We will already have complained. */
7882 type = error_mark_node;
7884 type = build_ptrmem_type (declarator->u.pointer.class_type,
7888 type = build_pointer_type (type);
7890 /* Process a list of type modifier keywords (such as
7891 const or volatile) that were given inside the `*' or `&'. */
7893 if (declarator->u.pointer.qualifiers)
7896 = cp_build_qualified_type (type,
7897 declarator->u.pointer.qualifiers);
7898 type_quals = cp_type_quals (type);
7911 if (unqualified_id && TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR
7912 && TREE_CODE (type) != FUNCTION_TYPE
7913 && TREE_CODE (type) != METHOD_TYPE)
7915 error ("template-id %qD used as a declarator",
7917 unqualified_id = dname;
7920 /* If TYPE is a FUNCTION_TYPE, but the function name was explicitly
7921 qualified with a class-name, turn it into a METHOD_TYPE, unless
7922 we know that the function is static. We take advantage of this
7923 opportunity to do other processing that pertains to entities
7924 explicitly declared to be class members. Note that if DECLARATOR
7925 is non-NULL, we know it is a cdk_id declarator; otherwise, we
7926 would not have exited the loop above. */
7928 && declarator->u.id.qualifying_scope
7929 && TYPE_P (declarator->u.id.qualifying_scope))
7933 ctype = declarator->u.id.qualifying_scope;
7934 ctype = TYPE_MAIN_VARIANT (ctype);
7936 while (t != NULL_TREE && CLASS_TYPE_P (t))
7938 /* You're supposed to have one `template <...>' for every
7939 template class, but you don't need one for a full
7940 specialization. For example:
7942 template <class T> struct S{};
7943 template <> struct S<int> { void f(); };
7944 void S<int>::f () {}
7946 is correct; there shouldn't be a `template <>' for the
7947 definition of `S<int>::f'. */
7948 if (CLASSTYPE_TEMPLATE_SPECIALIZATION (t)
7949 && !any_dependent_template_arguments_p (CLASSTYPE_TI_ARGS (t)))
7950 /* T is an explicit (not partial) specialization. All
7951 containing classes must therefore also be explicitly
7954 if ((CLASSTYPE_USE_TEMPLATE (t) || CLASSTYPE_IS_TEMPLATE (t))
7955 && PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (t)))
7956 template_count += 1;
7958 t = TYPE_MAIN_DECL (t);
7959 t = DECL_CONTEXT (t);
7962 if (ctype == current_class_type)
7965 pedwarn ("member functions are implicitly friends of their class");
7967 pedwarn ("extra qualification %<%T::%> on member %qs",
7970 else if (/* If the qualifying type is already complete, then we
7971 can skip the following checks. */
7972 !COMPLETE_TYPE_P (ctype)
7973 && (/* If the function is being defined, then
7974 qualifying type must certainly be complete. */
7976 /* A friend declaration of "T::f" is OK, even if
7977 "T" is a template parameter. But, if this
7978 function is not a friend, the qualifying type
7980 || (!friendp && !CLASS_TYPE_P (ctype))
7981 /* For a declaration, the type need not be
7982 complete, if either it is dependent (since there
7983 is no meaningful definition of complete in that
7984 case) or the qualifying class is currently being
7986 || !(dependent_type_p (ctype)
7987 || currently_open_class (ctype)))
7988 /* Check that the qualifying type is complete. */
7989 && !complete_type_or_else (ctype, NULL_TREE))
7990 return error_mark_node;
7991 else if (TREE_CODE (type) == FUNCTION_TYPE)
7993 tree sname = declarator->u.id.unqualified_name;
7995 if (current_class_type
7996 && (!friendp || funcdef_flag))
7999 ? "cannot define member function %<%T::%s%> within %<%T%>"
8000 : "cannot declare member function %<%T::%s%> within %<%T%>",
8001 ctype, name, current_class_type);
8002 return error_mark_node;
8005 if (TREE_CODE (sname) == IDENTIFIER_NODE
8006 && NEW_DELETE_OPNAME_P (sname))
8007 /* Overloaded operator new and operator delete
8008 are always static functions. */
8011 type = build_memfn_type (type, ctype, memfn_quals);
8013 else if (declspecs->specs[(int)ds_typedef]
8014 && current_class_type)
8016 error ("cannot declare member %<%T::%s%> within %qT",
8017 ctype, name, current_class_type);
8018 return error_mark_node;
8022 /* Now TYPE has the actual type. */
8027 *attrlist = chainon (returned_attrs, *attrlist);
8029 attrlist = &returned_attrs;
8032 /* Handle parameter packs. */
8033 if (parameter_pack_p)
8035 if (decl_context == PARM)
8036 /* Turn the type into a pack expansion.*/
8037 type = make_pack_expansion (type);
8039 error ("non-parameter %qs cannot be a parameter pack", name);
8042 /* Did array size calculations overflow? */
8044 if (TREE_CODE (type) == ARRAY_TYPE
8045 && COMPLETE_TYPE_P (type)
8046 && TREE_CODE (TYPE_SIZE_UNIT (type)) == INTEGER_CST
8047 && TREE_OVERFLOW (TYPE_SIZE_UNIT (type)))
8049 error ("size of array %qs is too large", name);
8050 /* If we proceed with the array type as it is, we'll eventually
8051 crash in tree_low_cst(). */
8052 type = error_mark_node;
8055 if ((decl_context == FIELD || decl_context == PARM)
8056 && !processing_template_decl
8057 && variably_modified_type_p (type, NULL_TREE))
8059 if (decl_context == FIELD)
8060 error ("data member may not have variably modified type %qT", type);
8062 error ("parameter may not have variably modified type %qT", type);
8063 type = error_mark_node;
8066 if (explicitp == 1 || (explicitp && friendp))
8068 /* [dcl.fct.spec] The explicit specifier shall only be used in
8069 declarations of constructors within a class definition. */
8070 error ("only declarations of constructors can be %<explicit%>");
8074 if (storage_class == sc_mutable)
8076 if (decl_context != FIELD || friendp)
8078 error ("non-member %qs cannot be declared %<mutable%>", name);
8079 storage_class = sc_none;
8081 else if (decl_context == TYPENAME || declspecs->specs[(int)ds_typedef])
8083 error ("non-object member %qs cannot be declared %<mutable%>", name);
8084 storage_class = sc_none;
8086 else if (TREE_CODE (type) == FUNCTION_TYPE
8087 || TREE_CODE (type) == METHOD_TYPE)
8089 error ("function %qs cannot be declared %<mutable%>", name);
8090 storage_class = sc_none;
8094 error ("static %qs cannot be declared %<mutable%>", name);
8095 storage_class = sc_none;
8097 else if (type_quals & TYPE_QUAL_CONST)
8099 error ("const %qs cannot be declared %<mutable%>", name);
8100 storage_class = sc_none;
8104 /* If this is declaring a typedef name, return a TYPE_DECL. */
8105 if (declspecs->specs[(int)ds_typedef] && decl_context != TYPENAME)
8109 /* Note that the grammar rejects storage classes
8110 in typenames, fields or parameters. */
8111 if (current_lang_name == lang_name_java)
8112 TYPE_FOR_JAVA (type) = 1;
8114 /* This declaration:
8116 typedef void f(int) const;
8118 declares a function type which is not a member of any
8119 particular class, but which is cv-qualified; for
8120 example "f S::*" declares a pointer to a const-qualified
8121 member function of S. We record the cv-qualification in the
8123 if (memfn_quals && TREE_CODE (type) == FUNCTION_TYPE)
8125 type = cp_build_qualified_type (type, memfn_quals);
8127 /* We have now dealt with these qualifiers. */
8128 memfn_quals = TYPE_UNQUALIFIED;
8131 if (decl_context == FIELD)
8132 decl = build_lang_decl (TYPE_DECL, unqualified_id, type);
8134 decl = build_decl (TYPE_DECL, unqualified_id, type);
8135 if (id_declarator && declarator->u.id.qualifying_scope)
8136 error ("%Jtypedef name may not be a nested-name-specifier", decl);
8138 if (decl_context != FIELD)
8140 if (!current_function_decl)
8141 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
8142 else if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (current_function_decl)
8143 || (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P
8144 (current_function_decl)))
8145 /* The TYPE_DECL is "abstract" because there will be
8146 clones of this constructor/destructor, and there will
8147 be copies of this TYPE_DECL generated in those
8149 DECL_ABSTRACT (decl) = 1;
8151 else if (constructor_name_p (unqualified_id, current_class_type))
8152 pedwarn ("ISO C++ forbids nested type %qD with same name "
8153 "as enclosing class",
8156 /* If the user declares "typedef struct {...} foo" then the
8157 struct will have an anonymous name. Fill that name in now.
8158 Nothing can refer to it, so nothing needs know about the name
8160 if (type != error_mark_node
8163 && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
8164 && TYPE_ANONYMOUS_P (type)
8165 /* Don't do this if there are attributes. */
8166 && (!attrlist || !*attrlist)
8167 && cp_type_quals (type) == TYPE_UNQUALIFIED)
8169 tree oldname = TYPE_NAME (type);
8172 /* Replace the anonymous name with the real name everywhere. */
8173 for (t = TYPE_MAIN_VARIANT (type); t; t = TYPE_NEXT_VARIANT (t))
8174 if (TYPE_NAME (t) == oldname)
8175 TYPE_NAME (t) = decl;
8177 if (TYPE_LANG_SPECIFIC (type))
8178 TYPE_WAS_ANONYMOUS (type) = 1;
8180 /* If this is a typedef within a template class, the nested
8181 type is a (non-primary) template. The name for the
8182 template needs updating as well. */
8183 if (TYPE_LANG_SPECIFIC (type) && CLASSTYPE_TEMPLATE_INFO (type))
8184 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type))
8185 = TYPE_IDENTIFIER (type);
8187 /* FIXME remangle member functions; member functions of a
8188 type with external linkage have external linkage. */
8192 || (typedef_decl && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl)))
8193 C_TYPEDEF_EXPLICITLY_SIGNED (decl) = 1;
8195 bad_specifiers (decl, "type", virtualp,
8196 memfn_quals != TYPE_UNQUALIFIED,
8197 inlinep, friendp, raises != NULL_TREE);
8202 /* Detect the case of an array type of unspecified size
8203 which came, as such, direct from a typedef name.
8204 We must copy the type, so that the array's domain can be
8205 individually set by the object's initializer. */
8207 if (type && typedef_type
8208 && TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type)
8209 && TYPE_MAIN_VARIANT (type) == TYPE_MAIN_VARIANT (typedef_type))
8210 type = build_cplus_array_type (TREE_TYPE (type), NULL_TREE);
8212 /* Detect where we're using a typedef of function type to declare a
8213 function. PARMS will not be set, so we must create it now. */
8215 if (type == typedef_type && TREE_CODE (type) == FUNCTION_TYPE)
8217 tree decls = NULL_TREE;
8220 for (args = TYPE_ARG_TYPES (type); args; args = TREE_CHAIN (args))
8222 tree decl = cp_build_parm_decl (NULL_TREE, TREE_VALUE (args));
8224 TREE_CHAIN (decl) = decls;
8228 parms = nreverse (decls);
8230 if (decl_context != TYPENAME)
8232 /* A cv-qualifier-seq shall only be part of the function type
8233 for a non-static member function. [8.3.5/4 dcl.fct] */
8234 if (cp_type_quals (type) != TYPE_UNQUALIFIED
8235 && (current_class_type == NULL_TREE || staticp) )
8238 ? G_("qualified function types cannot be used to "
8239 "declare static member functions")
8240 : G_("qualified function types cannot be used to "
8241 "declare free functions"));
8242 type = TYPE_MAIN_VARIANT (type);
8245 /* The qualifiers on the function type become the qualifiers on
8246 the non-static member function. */
8247 memfn_quals |= cp_type_quals (type);
8251 /* If this is a type name (such as, in a cast or sizeof),
8252 compute the type and return it now. */
8254 if (decl_context == TYPENAME)
8256 /* Note that the grammar rejects storage classes
8257 in typenames, fields or parameters. */
8258 if (type_quals != TYPE_UNQUALIFIED)
8259 type_quals = TYPE_UNQUALIFIED;
8261 /* Special case: "friend class foo" looks like a TYPENAME context. */
8264 if (type_quals != TYPE_UNQUALIFIED)
8266 error ("type qualifiers specified for friend class declaration");
8267 type_quals = TYPE_UNQUALIFIED;
8271 error ("%<inline%> specified for friend class declaration");
8277 /* Don't allow friend declaration without a class-key. */
8278 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
8279 pedwarn ("template parameters cannot be friends");
8280 else if (TREE_CODE (type) == TYPENAME_TYPE)
8281 pedwarn ("friend declaration requires class-key, "
8282 "i.e. %<friend class %T::%D%>",
8283 TYPE_CONTEXT (type), TYPENAME_TYPE_FULLNAME (type));
8285 pedwarn ("friend declaration requires class-key, "
8286 "i.e. %<friend %#T%>",
8290 /* Only try to do this stuff if we didn't already give up. */
8291 if (type != integer_type_node)
8293 /* A friendly class? */
8294 if (current_class_type)
8295 make_friend_class (current_class_type, TYPE_MAIN_VARIANT (type),
8298 error ("trying to make class %qT a friend of global scope",
8301 type = void_type_node;
8304 else if (memfn_quals)
8306 if (ctype == NULL_TREE)
8308 if (TREE_CODE (type) != METHOD_TYPE)
8309 error ("invalid qualifiers on non-member function type");
8311 ctype = TYPE_METHOD_BASETYPE (type);
8314 type = build_memfn_type (type, ctype, memfn_quals);
8319 else if (unqualified_id == NULL_TREE && decl_context != PARM
8320 && decl_context != CATCHPARM
8321 && TREE_CODE (type) != UNION_TYPE
8324 error ("abstract declarator %qT used as declaration", type);
8325 return error_mark_node;
8328 /* Only functions may be declared using an operator-function-id. */
8330 && IDENTIFIER_OPNAME_P (unqualified_id)
8331 && TREE_CODE (type) != FUNCTION_TYPE
8332 && TREE_CODE (type) != METHOD_TYPE)
8334 error ("declaration of %qD as non-function", unqualified_id);
8335 return error_mark_node;
8338 /* We don't check parameter types here because we can emit a better
8339 error message later. */
8340 if (decl_context != PARM)
8342 type = check_var_type (unqualified_id, type);
8343 if (type == error_mark_node)
8344 return error_mark_node;
8347 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
8348 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
8350 if (decl_context == PARM || decl_context == CATCHPARM)
8352 if (ctype || in_namespace)
8353 error ("cannot use %<::%> in parameter declaration");
8355 /* A parameter declared as an array of T is really a pointer to T.
8356 One declared as a function is really a pointer to a function.
8357 One declared as a member is really a pointer to member. */
8359 if (TREE_CODE (type) == ARRAY_TYPE)
8361 /* Transfer const-ness of array into that of type pointed to. */
8362 type = build_pointer_type (TREE_TYPE (type));
8363 type_quals = TYPE_UNQUALIFIED;
8365 else if (TREE_CODE (type) == FUNCTION_TYPE)
8366 type = build_pointer_type (type);
8372 if (decl_context == PARM)
8374 decl = cp_build_parm_decl (unqualified_id, type);
8376 bad_specifiers (decl, "parameter", virtualp,
8377 memfn_quals != TYPE_UNQUALIFIED,
8378 inlinep, friendp, raises != NULL_TREE);
8380 else if (decl_context == FIELD)
8382 /* The C99 flexible array extension. */
8383 if (!staticp && TREE_CODE (type) == ARRAY_TYPE
8384 && TYPE_DOMAIN (type) == NULL_TREE)
8386 tree itype = compute_array_index_type (dname, integer_zero_node);
8387 type = build_cplus_array_type (TREE_TYPE (type), itype);
8390 if (type == error_mark_node)
8392 /* Happens when declaring arrays of sizes which
8393 are error_mark_node, for example. */
8396 else if (in_namespace && !friendp)
8398 /* Something like struct S { int N::j; }; */
8399 error ("invalid use of %<::%>");
8400 return error_mark_node;
8402 else if (TREE_CODE (type) == FUNCTION_TYPE)
8405 tree function_context;
8409 if (ctype == NULL_TREE)
8410 ctype = current_class_type;
8412 if (ctype == NULL_TREE)
8414 error ("can't make %qD into a method -- not in a class",
8416 return error_mark_node;
8419 /* ``A union may [ ... ] not [ have ] virtual functions.''
8421 if (virtualp && TREE_CODE (ctype) == UNION_TYPE)
8423 error ("function %qD declared virtual inside a union",
8425 return error_mark_node;
8428 if (NEW_DELETE_OPNAME_P (unqualified_id))
8432 error ("%qD cannot be declared virtual, since it "
8438 else if (staticp < 2)
8439 type = build_memfn_type (type, ctype, memfn_quals);
8442 /* Check that the name used for a destructor makes sense. */
8443 if (sfk == sfk_destructor)
8447 gcc_assert (friendp);
8448 error ("expected qualified name in friend declaration "
8449 "for destructor %qD",
8450 id_declarator->u.id.unqualified_name);
8451 return error_mark_node;
8454 if (!same_type_p (TREE_OPERAND
8455 (id_declarator->u.id.unqualified_name, 0),
8458 error ("declaration of %qD as member of %qT",
8459 id_declarator->u.id.unqualified_name, ctype);
8460 return error_mark_node;
8464 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
8465 function_context = (ctype != NULL_TREE) ?
8466 decl_function_context (TYPE_MAIN_DECL (ctype)) : NULL_TREE;
8467 publicp = (! friendp || ! staticp)
8468 && function_context == NULL_TREE;
8469 decl = grokfndecl (ctype, type,
8470 TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
8471 ? unqualified_id : dname,
8474 virtualp, flags, memfn_quals, raises,
8475 friendp ? -1 : 0, friendp, publicp, inlinep,
8477 funcdef_flag, template_count, in_namespace, attrlist);
8478 if (decl == NULL_TREE)
8479 return error_mark_node;
8481 /* This clobbers the attrs stored in `decl' from `attrlist'. */
8482 /* The decl and setting of decl_attr is also turned off. */
8483 decl = build_decl_attribute_variant (decl, decl_attr);
8486 /* [class.conv.ctor]
8488 A constructor declared without the function-specifier
8489 explicit that can be called with a single parameter
8490 specifies a conversion from the type of its first
8491 parameter to the type of its class. Such a constructor
8492 is called a converting constructor. */
8494 DECL_NONCONVERTING_P (decl) = 1;
8495 else if (DECL_CONSTRUCTOR_P (decl))
8497 /* The constructor can be called with exactly one
8498 parameter if there is at least one parameter, and
8499 any subsequent parameters have default arguments.
8500 Ignore any compiler-added parms. */
8501 tree arg_types = FUNCTION_FIRST_USER_PARMTYPE (decl);
8503 if (arg_types == void_list_node
8505 && TREE_CHAIN (arg_types)
8506 && TREE_CHAIN (arg_types) != void_list_node
8507 && !TREE_PURPOSE (TREE_CHAIN (arg_types))))
8508 DECL_NONCONVERTING_P (decl) = 1;
8511 else if (TREE_CODE (type) == METHOD_TYPE)
8513 /* We only get here for friend declarations of
8514 members of other classes. */
8515 /* All method decls are public, so tell grokfndecl to set
8516 TREE_PUBLIC, also. */
8517 decl = grokfndecl (ctype, type,
8518 TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
8519 ? unqualified_id : dname,
8522 virtualp, flags, memfn_quals, raises,
8523 friendp ? -1 : 0, friendp, 1, 0, sfk,
8524 funcdef_flag, template_count, in_namespace,
8526 if (decl == NULL_TREE)
8527 return error_mark_node;
8529 else if (!staticp && !dependent_type_p (type)
8530 && !COMPLETE_TYPE_P (complete_type (type))
8531 && (TREE_CODE (type) != ARRAY_TYPE || initialized == 0))
8534 error ("field %qD has incomplete type", unqualified_id);
8536 error ("name %qT has incomplete type", type);
8538 /* If we're instantiating a template, tell them which
8539 instantiation made the field's type be incomplete. */
8540 if (current_class_type
8541 && TYPE_NAME (current_class_type)
8542 && IDENTIFIER_TEMPLATE (TYPE_IDENTIFIER (current_class_type))
8544 && declspecs->type == type)
8545 error (" in instantiation of template %qT",
8546 current_class_type);
8548 return error_mark_node;
8554 error ("%qE is neither function nor member function; "
8555 "cannot be declared friend", unqualified_id);
8563 /* Friends are treated specially. */
8564 if (ctype == current_class_type)
8565 ; /* We already issued a pedwarn. */
8566 else if (decl && DECL_NAME (decl))
8568 if (template_class_depth (current_class_type) == 0)
8570 decl = check_explicit_specialization
8571 (unqualified_id, decl, template_count,
8572 2 * funcdef_flag + 4);
8573 if (decl == error_mark_node)
8574 return error_mark_node;
8577 decl = do_friend (ctype, unqualified_id, decl,
8583 return error_mark_node;
8586 /* Structure field. It may not be a function, except for C++. */
8588 if (decl == NULL_TREE)
8594 /* An attempt is being made to initialize a non-static
8595 member. But, from [class.mem]:
8597 4 A member-declarator can contain a
8598 constant-initializer only if it declares a static
8599 member (_class.static_) of integral or enumeration
8600 type, see _class.static.data_.
8602 This used to be relatively common practice, but
8603 the rest of the compiler does not correctly
8604 handle the initialization unless the member is
8605 static so we make it static below. */
8606 pedwarn ("ISO C++ forbids initialization of member %qD",
8608 pedwarn ("making %qD static", unqualified_id);
8612 if (uses_template_parms (type))
8613 /* We'll check at instantiation time. */
8615 else if (check_static_variable_definition (unqualified_id,
8617 /* If we just return the declaration, crashes
8618 will sometimes occur. We therefore return
8619 void_type_node, as if this was a friend
8620 declaration, to cause callers to completely
8621 ignore this declaration. */
8622 return error_mark_node;
8627 /* C++ allows static class members. All other work
8628 for this is done by grokfield. */
8629 decl = build_lang_decl (VAR_DECL, unqualified_id, type);
8630 set_linkage_for_static_data_member (decl);
8631 /* Even if there is an in-class initialization, DECL
8632 is considered undefined until an out-of-class
8633 definition is provided. */
8634 DECL_EXTERNAL (decl) = 1;
8637 DECL_TLS_MODEL (decl) = decl_default_tls_model (decl);
8641 decl = build_decl (FIELD_DECL, unqualified_id, type);
8642 DECL_NONADDRESSABLE_P (decl) = bitfield;
8643 if (bitfield && !unqualified_id)
8644 TREE_NO_WARNING (decl) = 1;
8646 if (storage_class == sc_mutable)
8648 DECL_MUTABLE_P (decl) = 1;
8649 storage_class = sc_none;
8653 bad_specifiers (decl, "field", virtualp,
8654 memfn_quals != TYPE_UNQUALIFIED,
8655 inlinep, friendp, raises != NULL_TREE);
8658 else if (TREE_CODE (type) == FUNCTION_TYPE
8659 || TREE_CODE (type) == METHOD_TYPE)
8664 if (!unqualified_id)
8665 return error_mark_node;
8667 if (TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR)
8668 original_name = dname;
8670 original_name = unqualified_id;
8672 if (storage_class == sc_auto)
8673 error ("storage class %<auto%> invalid for function %qs", name);
8674 else if (storage_class == sc_register)
8675 error ("storage class %<register%> invalid for function %qs", name);
8677 error ("storage class %<__thread%> invalid for function %qs", name);
8679 /* Function declaration not at top level.
8680 Storage classes other than `extern' are not allowed
8681 and `extern' makes no difference. */
8682 if (! toplevel_bindings_p ()
8683 && (storage_class == sc_static
8684 || declspecs->specs[(int)ds_inline])
8687 if (storage_class == sc_static)
8688 pedwarn ("%<static%> specified invalid for function %qs "
8689 "declared out of global scope", name);
8691 pedwarn ("%<inline%> specifier invalid for function %qs "
8692 "declared out of global scope", name);
8695 if (ctype == NULL_TREE)
8699 error ("virtual non-class function %qs", name);
8703 else if (TREE_CODE (type) == FUNCTION_TYPE && staticp < 2
8704 && !NEW_DELETE_OPNAME_P (original_name))
8705 type = build_method_type_directly (ctype,
8707 TYPE_ARG_TYPES (type));
8709 /* Record presence of `static'. */
8710 publicp = (ctype != NULL_TREE
8711 || storage_class == sc_extern
8712 || storage_class != sc_static);
8714 decl = grokfndecl (ctype, type, original_name, parms, unqualified_id,
8715 virtualp, flags, memfn_quals, raises,
8717 publicp, inlinep, sfk, funcdef_flag,
8718 template_count, in_namespace, attrlist);
8719 if (decl == NULL_TREE)
8720 return error_mark_node;
8724 int invalid_static = 0;
8726 /* Don't allow a static member function in a class, and forbid
8727 declaring main to be static. */
8728 if (TREE_CODE (type) == METHOD_TYPE)
8730 pedwarn ("cannot declare member function %qD to have "
8731 "static linkage", decl);
8734 else if (current_function_decl)
8736 /* FIXME need arm citation */
8737 error ("cannot declare static function inside another function");
8744 storage_class = sc_none;
8750 /* It's a variable. */
8752 /* An uninitialized decl with `extern' is a reference. */
8753 decl = grokvardecl (type, unqualified_id,
8756 (type_quals & TYPE_QUAL_CONST) != 0,
8757 ctype ? ctype : in_namespace);
8758 bad_specifiers (decl, "variable", virtualp,
8759 memfn_quals != TYPE_UNQUALIFIED,
8760 inlinep, friendp, raises != NULL_TREE);
8764 DECL_CONTEXT (decl) = ctype;
8767 pedwarn ("%<static%> may not be used when defining "
8768 "(as opposed to declaring) a static data member");
8770 storage_class = sc_none;
8772 if (storage_class == sc_register && TREE_STATIC (decl))
8774 error ("static member %qD declared %<register%>", decl);
8775 storage_class = sc_none;
8777 if (storage_class == sc_extern && pedantic)
8779 pedwarn ("cannot explicitly declare member %q#D to have "
8782 storage_class = sc_none;
8787 /* Record `register' declaration for warnings on &
8788 and in case doing stupid register allocation. */
8790 if (storage_class == sc_register)
8791 DECL_REGISTER (decl) = 1;
8792 else if (storage_class == sc_extern)
8793 DECL_THIS_EXTERN (decl) = 1;
8794 else if (storage_class == sc_static)
8795 DECL_THIS_STATIC (decl) = 1;
8797 /* Record constancy and volatility. There's no need to do this
8798 when processing a template; we'll do this for the instantiated
8799 declaration based on the type of DECL. */
8800 if (!processing_template_decl)
8801 cp_apply_type_quals_to_decl (type_quals, decl);
8804 TREE_NO_WARNING (decl) = 1;
8810 /* Subroutine of start_function. Ensure that each of the parameter
8811 types (as listed in PARMS) is complete, as is required for a
8812 function definition. */
8815 require_complete_types_for_parms (tree parms)
8817 for (; parms; parms = TREE_CHAIN (parms))
8819 if (dependent_type_p (TREE_TYPE (parms)))
8821 if (!VOID_TYPE_P (TREE_TYPE (parms))
8822 && complete_type_or_else (TREE_TYPE (parms), parms))
8824 relayout_decl (parms);
8825 DECL_ARG_TYPE (parms) = type_passed_as (TREE_TYPE (parms));
8828 /* grokparms or complete_type_or_else will have already issued
8830 TREE_TYPE (parms) = error_mark_node;
8834 /* Returns nonzero if T is a local variable. */
8837 local_variable_p (tree t)
8839 if ((TREE_CODE (t) == VAR_DECL
8840 /* A VAR_DECL with a context that is a _TYPE is a static data
8842 && !TYPE_P (CP_DECL_CONTEXT (t))
8843 /* Any other non-local variable must be at namespace scope. */
8844 && !DECL_NAMESPACE_SCOPE_P (t))
8845 || (TREE_CODE (t) == PARM_DECL))
8851 /* Returns nonzero if T is an automatic local variable or a label.
8852 (These are the declarations that need to be remapped when the code
8853 containing them is duplicated.) */
8856 nonstatic_local_decl_p (tree t)
8858 return ((local_variable_p (t) && !TREE_STATIC (t))
8859 || TREE_CODE (t) == LABEL_DECL
8860 || TREE_CODE (t) == RESULT_DECL);
8863 /* Like local_variable_p, but suitable for use as a tree-walking
8867 local_variable_p_walkfn (tree *tp, int *walk_subtrees,
8868 void *data ATTRIBUTE_UNUSED)
8870 if (local_variable_p (*tp) && !DECL_ARTIFICIAL (*tp))
8872 else if (TYPE_P (*tp))
8879 /* Check that ARG, which is a default-argument expression for a
8880 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
8881 something goes wrong. DECL may also be a _TYPE node, rather than a
8882 DECL, if there is no DECL available. */
8885 check_default_argument (tree decl, tree arg)
8890 if (TREE_CODE (arg) == DEFAULT_ARG)
8891 /* We get a DEFAULT_ARG when looking at an in-class declaration
8892 with a default argument. Ignore the argument for now; we'll
8893 deal with it after the class is complete. */
8902 decl_type = TREE_TYPE (decl);
8904 if (arg == error_mark_node
8905 || decl == error_mark_node
8906 || TREE_TYPE (arg) == error_mark_node
8907 || decl_type == error_mark_node)
8908 /* Something already went wrong. There's no need to check
8910 return error_mark_node;
8912 /* [dcl.fct.default]
8914 A default argument expression is implicitly converted to the
8916 if (!TREE_TYPE (arg)
8917 || !can_convert_arg (decl_type, TREE_TYPE (arg), arg, LOOKUP_NORMAL))
8920 error ("default argument for %q#D has type %qT",
8921 decl, TREE_TYPE (arg));
8923 error ("default argument for parameter of type %qT has type %qT",
8924 decl_type, TREE_TYPE (arg));
8926 return error_mark_node;
8929 /* [dcl.fct.default]
8931 Local variables shall not be used in default argument
8934 The keyword `this' shall not be used in a default argument of a
8936 var = walk_tree_without_duplicates (&arg, local_variable_p_walkfn,
8940 error ("default argument %qE uses local variable %qD", arg, var);
8941 return error_mark_node;
8948 /* Decode the list of parameter types for a function type.
8949 Given the list of things declared inside the parens,
8950 return a list of types.
8952 If this parameter does not end with an ellipsis, we append
8955 *PARMS is set to the chain of PARM_DECLs created. */
8958 grokparms (cp_parameter_declarator *first_parm, tree *parms)
8960 tree result = NULL_TREE;
8961 tree decls = NULL_TREE;
8962 int ellipsis = !first_parm || first_parm->ellipsis_p;
8963 cp_parameter_declarator *parm;
8965 struct pointer_set_t *unique_decls = pointer_set_create ();
8967 for (parm = first_parm; parm != NULL; parm = parm->next)
8969 tree type = NULL_TREE;
8970 tree init = parm->default_argument;
8974 if (parm == no_parameters)
8977 attrs = parm->decl_specifiers.attributes;
8978 parm->decl_specifiers.attributes = NULL_TREE;
8979 decl = grokdeclarator (parm->declarator, &parm->decl_specifiers,
8980 PARM, init != NULL_TREE, &attrs);
8981 if (! decl || TREE_TYPE (decl) == error_mark_node)
8985 cplus_decl_attributes (&decl, attrs, 0);
8987 type = TREE_TYPE (decl);
8988 if (VOID_TYPE_P (type))
8990 if (same_type_p (type, void_type_node)
8991 && DECL_SELF_REFERENCE_P (type)
8992 && !DECL_NAME (decl) && !result && !parm->next && !ellipsis)
8993 /* this is a parmlist of `(void)', which is ok. */
8995 cxx_incomplete_type_error (decl, type);
8996 /* It's not a good idea to actually create parameters of
8997 type `void'; other parts of the compiler assume that a
8998 void type terminates the parameter list. */
8999 type = error_mark_node;
9000 TREE_TYPE (decl) = error_mark_node;
9003 if (type != error_mark_node)
9005 /* Top-level qualifiers on the parameters are
9006 ignored for function types. */
9007 type = cp_build_qualified_type (type, 0);
9008 if (TREE_CODE (type) == METHOD_TYPE)
9010 error ("parameter %qD invalidly declared method type", decl);
9011 type = build_pointer_type (type);
9012 TREE_TYPE (decl) = type;
9014 else if (abstract_virtuals_error (decl, type))
9015 any_error = 1; /* Seems like a good idea. */
9016 else if (POINTER_TYPE_P (type))
9018 /* [dcl.fct]/6, parameter types cannot contain pointers
9019 (references) to arrays of unknown bound. */
9020 tree t = TREE_TYPE (type);
9021 int ptr = TYPE_PTR_P (type);
9027 else if (TREE_CODE (t) != ARRAY_TYPE)
9029 else if (!TYPE_DOMAIN (t))
9033 if (TREE_CODE (t) == ARRAY_TYPE)
9034 error ("parameter %qD includes %s to array of unknown "
9036 decl, ptr ? "pointer" : "reference", t);
9041 else if (init && !processing_template_decl)
9042 init = check_default_argument (decl, init);
9045 if (TREE_CODE (decl) == PARM_DECL
9046 && FUNCTION_PARAMETER_PACK_P (decl)
9048 error ("parameter packs must be at the end of the parameter list");
9050 if (DECL_NAME (decl))
9052 if (pointer_set_contains (unique_decls, DECL_NAME (decl)))
9053 error ("multiple parameters named %qE", DECL_NAME (decl));
9055 pointer_set_insert (unique_decls, DECL_NAME (decl));
9058 TREE_CHAIN (decl) = decls;
9060 result = tree_cons (init, type, result);
9062 decls = nreverse (decls);
9063 result = nreverse (result);
9065 result = chainon (result, void_list_node);
9068 pointer_set_destroy (unique_decls);
9073 /* D is a constructor or overloaded `operator='.
9075 Let T be the class in which D is declared. Then, this function
9078 -1 if D's is an ill-formed constructor or copy assignment operator
9079 whose first parameter is of type `T'.
9080 0 if D is not a copy constructor or copy assignment
9082 1 if D is a copy constructor or copy assignment operator whose
9083 first parameter is a reference to const qualified T.
9084 2 if D is a copy constructor or copy assignment operator whose
9085 first parameter is a reference to non-const qualified T.
9087 This function can be used as a predicate. Positive values indicate
9088 a copy constructor and nonzero values indicate a copy assignment
9098 gcc_assert (DECL_FUNCTION_MEMBER_P (d));
9100 if (TREE_CODE (d) == TEMPLATE_DECL
9101 || (DECL_TEMPLATE_INFO (d)
9102 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d))))
9103 /* Instantiations of template member functions are never copy
9104 functions. Note that member functions of templated classes are
9105 represented as template functions internally, and we must
9106 accept those as copy functions. */
9109 args = FUNCTION_FIRST_USER_PARMTYPE (d);
9113 arg_type = TREE_VALUE (args);
9114 if (arg_type == error_mark_node)
9117 if (TYPE_MAIN_VARIANT (arg_type) == DECL_CONTEXT (d))
9119 /* Pass by value copy assignment operator. */
9122 else if (TREE_CODE (arg_type) == REFERENCE_TYPE
9123 && !TYPE_REF_IS_RVALUE (arg_type)
9124 && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type)) == DECL_CONTEXT (d))
9126 if (CP_TYPE_CONST_P (TREE_TYPE (arg_type)))
9132 args = TREE_CHAIN (args);
9134 if (args && args != void_list_node && !TREE_PURPOSE (args))
9135 /* There are more non-optional args. */
9141 /* D is a constructor or overloaded `operator='.
9143 Let T be the class in which D is declared. Then, this function
9144 returns true when D is a move constructor or move assignment
9145 operator, false otherwise. */
9152 bool result = false;
9154 gcc_assert (DECL_FUNCTION_MEMBER_P (d));
9157 /* There are no move constructors if we aren't in C++0x mode. */
9160 if (TREE_CODE (d) == TEMPLATE_DECL
9161 || (DECL_TEMPLATE_INFO (d)
9162 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d))))
9163 /* Instantiations of template member functions are never copy
9164 functions. Note that member functions of templated classes are
9165 represented as template functions internally, and we must
9166 accept those as copy functions. */
9169 args = FUNCTION_FIRST_USER_PARMTYPE (d);
9173 arg_type = TREE_VALUE (args);
9174 if (arg_type == error_mark_node)
9177 if (TREE_CODE (arg_type) == REFERENCE_TYPE
9178 && TYPE_REF_IS_RVALUE (arg_type)
9179 && same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (arg_type)),
9183 args = TREE_CHAIN (args);
9185 if (args && args != void_list_node && !TREE_PURPOSE (args))
9186 /* There are more non-optional args. */
9192 /* Remember any special properties of member function DECL. */
9194 void grok_special_member_properties (tree decl)
9198 if (!DECL_NONSTATIC_MEMBER_FUNCTION_P (decl))
9201 class_type = DECL_CONTEXT (decl);
9202 if (DECL_CONSTRUCTOR_P (decl))
9204 int ctor = copy_fn_p (decl);
9206 TYPE_HAS_CONSTRUCTOR (class_type) = 1;
9212 A non-template constructor for class X is a copy
9213 constructor if its first parameter is of type X&, const
9214 X&, volatile X& or const volatile X&, and either there
9215 are no other parameters or else all other parameters have
9216 default arguments. */
9217 TYPE_HAS_INIT_REF (class_type) = 1;
9219 TYPE_HAS_CONST_INIT_REF (class_type) = 1;
9221 else if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl)))
9222 TYPE_HAS_DEFAULT_CONSTRUCTOR (class_type) = 1;
9224 else if (DECL_OVERLOADED_OPERATOR_P (decl) == NOP_EXPR)
9228 A non-template assignment operator for class X is a copy
9229 assignment operator if its parameter is of type X, X&, const
9230 X&, volatile X& or const volatile X&. */
9232 int assop = copy_fn_p (decl);
9236 TYPE_HAS_ASSIGN_REF (class_type) = 1;
9238 TYPE_HAS_CONST_ASSIGN_REF (class_type) = 1;
9243 /* Check a constructor DECL has the correct form. Complains
9244 if the class has a constructor of the form X(X). */
9247 grok_ctor_properties (tree ctype, tree decl)
9249 int ctor_parm = copy_fn_p (decl);
9255 A declaration of a constructor for a class X is ill-formed if
9256 its first parameter is of type (optionally cv-qualified) X
9257 and either there are no other parameters or else all other
9258 parameters have default arguments.
9260 We *don't* complain about member template instantiations that
9261 have this form, though; they can occur as we try to decide
9262 what constructor to use during overload resolution. Since
9263 overload resolution will never prefer such a constructor to
9264 the non-template copy constructor (which is either explicitly
9265 or implicitly defined), there's no need to worry about their
9266 existence. Theoretically, they should never even be
9267 instantiated, but that's hard to forestall. */
9268 error ("invalid constructor; you probably meant %<%T (const %T&)%>",
9276 /* An operator with this code is unary, but can also be binary. */
9279 ambi_op_p (enum tree_code code)
9281 return (code == INDIRECT_REF
9282 || code == ADDR_EXPR
9283 || code == UNARY_PLUS_EXPR
9284 || code == NEGATE_EXPR
9285 || code == PREINCREMENT_EXPR
9286 || code == PREDECREMENT_EXPR);
9289 /* An operator with this name can only be unary. */
9292 unary_op_p (enum tree_code code)
9294 return (code == TRUTH_NOT_EXPR
9295 || code == BIT_NOT_EXPR
9296 || code == COMPONENT_REF
9297 || code == TYPE_EXPR);
9300 /* DECL is a declaration for an overloaded operator. If COMPLAIN is true,
9301 errors are issued for invalid declarations. */
9304 grok_op_properties (tree decl, bool complain)
9306 tree argtypes = TYPE_ARG_TYPES (TREE_TYPE (decl));
9308 int methodp = (TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE);
9309 tree name = DECL_NAME (decl);
9310 enum tree_code operator_code;
9315 /* Count the number of arguments and check for ellipsis. */
9316 for (argtype = argtypes, arity = 0;
9317 argtype && argtype != void_list_node;
9318 argtype = TREE_CHAIN (argtype))
9320 ellipsis_p = !argtype;
9322 class_type = DECL_CONTEXT (decl);
9323 if (class_type && !CLASS_TYPE_P (class_type))
9324 class_type = NULL_TREE;
9326 if (DECL_CONV_FN_P (decl))
9327 operator_code = TYPE_EXPR;
9331 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
9332 if (ansi_opname (CODE) == name) \
9334 operator_code = (CODE); \
9337 else if (ansi_assopname (CODE) == name) \
9339 operator_code = (CODE); \
9340 DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
9344 #include "operators.def"
9350 gcc_assert (operator_code != LAST_CPLUS_TREE_CODE);
9351 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
9354 switch (operator_code)
9357 TYPE_HAS_NEW_OPERATOR (class_type) = 1;
9361 TYPE_GETS_DELETE (class_type) |= 1;
9365 TYPE_HAS_ARRAY_NEW_OPERATOR (class_type) = 1;
9368 case VEC_DELETE_EXPR:
9369 TYPE_GETS_DELETE (class_type) |= 2;
9376 /* [basic.std.dynamic.allocation]/1:
9378 A program is ill-formed if an allocation function is declared
9379 in a namespace scope other than global scope or declared static
9382 The same also holds true for deallocation functions. */
9383 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR
9384 || operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
9386 if (DECL_NAMESPACE_SCOPE_P (decl))
9388 if (CP_DECL_CONTEXT (decl) != global_namespace)
9390 error ("%qD may not be declared within a namespace", decl);
9393 else if (!TREE_PUBLIC (decl))
9395 error ("%qD may not be declared as static", decl);
9401 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR)
9402 TREE_TYPE (decl) = coerce_new_type (TREE_TYPE (decl));
9403 else if (operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
9404 TREE_TYPE (decl) = coerce_delete_type (TREE_TYPE (decl));
9407 /* An operator function must either be a non-static member function
9408 or have at least one parameter of a class, a reference to a class,
9409 an enumeration, or a reference to an enumeration. 13.4.0.6 */
9410 if (! methodp || DECL_STATIC_FUNCTION_P (decl))
9412 if (operator_code == TYPE_EXPR
9413 || operator_code == CALL_EXPR
9414 || operator_code == COMPONENT_REF
9415 || operator_code == ARRAY_REF
9416 || operator_code == NOP_EXPR)
9418 error ("%qD must be a nonstatic member function", decl);
9425 if (DECL_STATIC_FUNCTION_P (decl))
9427 error ("%qD must be either a non-static member "
9428 "function or a non-member function", decl);
9432 for (p = argtypes; p && p != void_list_node; p = TREE_CHAIN (p))
9434 tree arg = non_reference (TREE_VALUE (p));
9435 if (arg == error_mark_node)
9438 /* IS_AGGR_TYPE, rather than CLASS_TYPE_P, is used
9439 because these checks are performed even on
9440 template functions. */
9441 if (IS_AGGR_TYPE (arg) || TREE_CODE (arg) == ENUMERAL_TYPE)
9445 if (!p || p == void_list_node)
9448 error ("%qD must have an argument of class or "
9449 "enumerated type", decl);
9455 /* There are no restrictions on the arguments to an overloaded
9457 if (operator_code == CALL_EXPR)
9460 /* Warn about conversion operators that will never be used. */
9461 if (IDENTIFIER_TYPENAME_P (name)
9462 && ! DECL_TEMPLATE_INFO (decl)
9464 /* Warn only declaring the function; there is no need to
9465 warn again about out-of-class definitions. */
9466 && class_type == current_class_type)
9468 tree t = TREE_TYPE (name);
9469 int ref = (TREE_CODE (t) == REFERENCE_TYPE);
9470 const char *what = 0;
9473 t = TYPE_MAIN_VARIANT (TREE_TYPE (t));
9475 if (TREE_CODE (t) == VOID_TYPE)
9477 else if (class_type)
9479 if (t == class_type)
9480 what = "the same type";
9481 /* Don't force t to be complete here. */
9482 else if (IS_AGGR_TYPE (t)
9483 && COMPLETE_TYPE_P (t)
9484 && DERIVED_FROM_P (t, class_type))
9485 what = "a base class";
9489 warning (OPT_Wconversion, "conversion to %s%s will never use a type "
9490 "conversion operator",
9491 ref ? "a reference to " : "", what);
9494 if (operator_code == COND_EXPR)
9497 error ("ISO C++ prohibits overloading operator ?:");
9500 else if (ellipsis_p)
9502 error ("%qD must not have variable number of arguments", decl);
9505 else if (ambi_op_p (operator_code))
9508 /* We pick the one-argument operator codes by default, so
9509 we don't have to change anything. */
9511 else if (arity == 2)
9513 /* If we thought this was a unary operator, we now know
9514 it to be a binary operator. */
9515 switch (operator_code)
9518 operator_code = MULT_EXPR;
9522 operator_code = BIT_AND_EXPR;
9525 case UNARY_PLUS_EXPR:
9526 operator_code = PLUS_EXPR;
9530 operator_code = MINUS_EXPR;
9533 case PREINCREMENT_EXPR:
9534 operator_code = POSTINCREMENT_EXPR;
9537 case PREDECREMENT_EXPR:
9538 operator_code = POSTDECREMENT_EXPR;
9545 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
9547 if ((operator_code == POSTINCREMENT_EXPR
9548 || operator_code == POSTDECREMENT_EXPR)
9549 && ! processing_template_decl
9550 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes)), integer_type_node))
9553 error ("postfix %qD must take %<int%> as its argument",
9556 error ("postfix %qD must take %<int%> as its second "
9564 error ("%qD must take either zero or one argument", decl);
9566 error ("%qD must take either one or two arguments", decl);
9570 /* More Effective C++ rule 6. */
9572 && (operator_code == POSTINCREMENT_EXPR
9573 || operator_code == POSTDECREMENT_EXPR
9574 || operator_code == PREINCREMENT_EXPR
9575 || operator_code == PREDECREMENT_EXPR))
9577 tree arg = TREE_VALUE (argtypes);
9578 tree ret = TREE_TYPE (TREE_TYPE (decl));
9579 if (methodp || TREE_CODE (arg) == REFERENCE_TYPE)
9580 arg = TREE_TYPE (arg);
9581 arg = TYPE_MAIN_VARIANT (arg);
9582 if (operator_code == PREINCREMENT_EXPR
9583 || operator_code == PREDECREMENT_EXPR)
9585 if (TREE_CODE (ret) != REFERENCE_TYPE
9586 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret)),
9588 warning (OPT_Weffc__, "prefix %qD should return %qT", decl,
9589 build_reference_type (arg));
9593 if (!same_type_p (TYPE_MAIN_VARIANT (ret), arg))
9594 warning (OPT_Weffc__, "postfix %qD should return %qT", decl, arg);
9598 else if (unary_op_p (operator_code))
9603 error ("%qD must take %<void%>", decl);
9605 error ("%qD must take exactly one argument", decl);
9609 else /* if (binary_op_p (operator_code)) */
9614 error ("%qD must take exactly one argument", decl);
9616 error ("%qD must take exactly two arguments", decl);
9620 /* More Effective C++ rule 7. */
9622 && (operator_code == TRUTH_ANDIF_EXPR
9623 || operator_code == TRUTH_ORIF_EXPR
9624 || operator_code == COMPOUND_EXPR))
9625 warning (OPT_Weffc__, "user-defined %qD always evaluates both arguments",
9629 /* Effective C++ rule 23. */
9632 && !DECL_ASSIGNMENT_OPERATOR_P (decl)
9633 && (operator_code == PLUS_EXPR
9634 || operator_code == MINUS_EXPR
9635 || operator_code == TRUNC_DIV_EXPR
9636 || operator_code == MULT_EXPR
9637 || operator_code == TRUNC_MOD_EXPR)
9638 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl))) == REFERENCE_TYPE)
9639 warning (OPT_Weffc__, "%qD should return by value", decl);
9642 for (; argtypes && argtypes != void_list_node;
9643 argtypes = TREE_CHAIN (argtypes))
9644 if (TREE_PURPOSE (argtypes))
9646 TREE_PURPOSE (argtypes) = NULL_TREE;
9647 if (operator_code == POSTINCREMENT_EXPR
9648 || operator_code == POSTDECREMENT_EXPR)
9651 pedwarn ("%qD cannot have default arguments", decl);
9655 error ("%qD cannot have default arguments", decl);
9663 /* Return a string giving the keyword associate with CODE. */
9666 tag_name (enum tag_types code)
9685 /* Name lookup in an elaborated-type-specifier (after the keyword
9686 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
9687 elaborated-type-specifier is invalid, issue a diagnostic and return
9688 error_mark_node; otherwise, return the *_TYPE to which it referred.
9689 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
9692 check_elaborated_type_specifier (enum tag_types tag_code,
9694 bool allow_template_p)
9700 struct S { struct S *p; };
9702 name lookup will find the TYPE_DECL for the implicit "S::S"
9703 typedef. Adjust for that here. */
9704 if (DECL_SELF_REFERENCE_P (decl))
9705 decl = TYPE_NAME (TREE_TYPE (decl));
9707 type = TREE_TYPE (decl);
9709 /* Check TEMPLATE_TYPE_PARM first because DECL_IMPLICIT_TYPEDEF_P
9710 is false for this case as well. */
9711 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
9713 error ("using template type parameter %qT after %qs",
9714 type, tag_name (tag_code));
9715 return error_mark_node;
9719 If the identifier resolves to a typedef-name or a template
9720 type-parameter, the elaborated-type-specifier is ill-formed.
9722 In other words, the only legitimate declaration to use in the
9723 elaborated type specifier is the implicit typedef created when
9724 the type is declared. */
9725 else if (!DECL_IMPLICIT_TYPEDEF_P (decl)
9726 && tag_code != typename_type)
9728 error ("using typedef-name %qD after %qs", decl, tag_name (tag_code));
9729 error ("%q+D has a previous declaration here", decl);
9730 return error_mark_node;
9732 else if (TREE_CODE (type) != RECORD_TYPE
9733 && TREE_CODE (type) != UNION_TYPE
9734 && tag_code != enum_type
9735 && tag_code != typename_type)
9737 error ("%qT referred to as %qs", type, tag_name (tag_code));
9738 error ("%q+T has a previous declaration here", type);
9739 return error_mark_node;
9741 else if (TREE_CODE (type) != ENUMERAL_TYPE
9742 && tag_code == enum_type)
9744 error ("%qT referred to as enum", type);
9745 error ("%q+T has a previous declaration here", type);
9746 return error_mark_node;
9748 else if (!allow_template_p
9749 && TREE_CODE (type) == RECORD_TYPE
9750 && CLASSTYPE_IS_TEMPLATE (type))
9752 /* If a class template appears as elaborated type specifier
9753 without a template header such as:
9755 template <class T> class C {};
9756 void f(class C); // No template header here
9758 then the required template argument is missing. */
9759 error ("template argument required for %<%s %T%>",
9760 tag_name (tag_code),
9761 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type)));
9762 return error_mark_node;
9768 /* Lookup NAME in elaborate type specifier in scope according to
9769 SCOPE and issue diagnostics if necessary.
9770 Return *_TYPE node upon success, NULL_TREE when the NAME is not
9771 found, and ERROR_MARK_NODE for type error. */
9774 lookup_and_check_tag (enum tag_types tag_code, tree name,
9775 tag_scope scope, bool template_header_p)
9779 if (scope == ts_global)
9781 /* First try ordinary name lookup, ignoring hidden class name
9782 injected via friend declaration. */
9783 decl = lookup_name_prefer_type (name, 2);
9784 /* If that fails, the name will be placed in the smallest
9785 non-class, non-function-prototype scope according to 3.3.1/5.
9786 We may already have a hidden name declared as friend in this
9787 scope. So lookup again but not ignoring hidden names.
9788 If we find one, that name will be made visible rather than
9789 creating a new tag. */
9791 decl = lookup_type_scope (name, ts_within_enclosing_non_class);
9794 decl = lookup_type_scope (name, scope);
9796 if (decl && DECL_CLASS_TEMPLATE_P (decl))
9797 decl = DECL_TEMPLATE_RESULT (decl);
9799 if (decl && TREE_CODE (decl) == TYPE_DECL)
9801 /* Look for invalid nested type:
9805 if (scope == ts_current && DECL_SELF_REFERENCE_P (decl))
9807 error ("%qD has the same name as the class in which it is "
9810 return error_mark_node;
9813 /* Two cases we need to consider when deciding if a class
9814 template is allowed as an elaborated type specifier:
9815 1. It is a self reference to its own class.
9816 2. It comes with a template header.
9820 template <class T> class C {
9821 class C *c1; // DECL_SELF_REFERENCE_P is true
9824 template <class U> class C; // template_header_p is true
9825 template <class T> class C<T>::D {
9826 class C *c2; // DECL_SELF_REFERENCE_P is true
9829 t = check_elaborated_type_specifier (tag_code,
9832 | DECL_SELF_REFERENCE_P (decl));
9839 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
9840 Define the tag as a forward-reference if it is not defined.
9842 If a declaration is given, process it here, and report an error if
9843 multiple declarations are not identical.
9845 SCOPE is TS_CURRENT when this is also a definition. Only look in
9846 the current frame for the name (since C++ allows new names in any
9847 scope.) It is TS_WITHIN_ENCLOSING_NON_CLASS if this is a friend
9848 declaration. Only look beginning from the current scope outward up
9849 till the nearest non-class scope. Otherwise it is TS_GLOBAL.
9851 TEMPLATE_HEADER_P is true when this declaration is preceded by
9852 a set of template parameters. */
9855 xref_tag (enum tag_types tag_code, tree name,
9856 tag_scope scope, bool template_header_p)
9858 enum tree_code code;
9860 tree context = NULL_TREE;
9862 timevar_push (TV_NAME_LOOKUP);
9864 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
9876 code = ENUMERAL_TYPE;
9882 /* In case of anonymous name, xref_tag is only called to
9883 make type node and push name. Name lookup is not required. */
9884 if (ANON_AGGRNAME_P (name))
9887 t = lookup_and_check_tag (tag_code, name,
9888 scope, template_header_p);
9890 if (t == error_mark_node)
9891 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
9893 if (scope != ts_current && t && current_class_type
9894 && template_class_depth (current_class_type)
9895 && template_header_p)
9897 /* Since SCOPE is not TS_CURRENT, we are not looking at a
9898 definition of this tag. Since, in addition, we are currently
9899 processing a (member) template declaration of a template
9900 class, we must be very careful; consider:
9907 { template <class V>
9908 friend struct S1; };
9910 Here, the S2::S1 declaration should not be confused with the
9911 outer declaration. In particular, the inner version should
9912 have a template parameter of level 2, not level 1. This
9913 would be particularly important if the member declaration
9916 template <class V = U> friend struct S1;
9918 say, when we should tsubst into `U' when instantiating
9919 S2. On the other hand, when presented with:
9929 we must find the inner binding eventually. We
9930 accomplish this by making sure that the new type we
9931 create to represent this declaration has the right
9933 context = TYPE_CONTEXT (t);
9939 /* If no such tag is yet defined, create a forward-reference node
9940 and record it as the "definition".
9941 When a real declaration of this type is found,
9942 the forward-reference will be altered into a real type. */
9943 if (code == ENUMERAL_TYPE)
9945 error ("use of enum %q#D without previous declaration", name);
9946 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
9950 t = make_aggr_type (code);
9951 TYPE_CONTEXT (t) = context;
9952 t = pushtag (name, t, scope);
9957 if (template_header_p && IS_AGGR_TYPE (t))
9959 if (!redeclare_class_template (t, current_template_parms))
9960 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
9962 else if (!processing_template_decl
9964 && CLASSTYPE_IS_TEMPLATE (t))
9966 error ("redeclaration of %qT as a non-template", t);
9967 error ("previous declaration %q+D", t);
9968 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
9971 /* Make injected friend class visible. */
9972 if (scope != ts_within_enclosing_non_class
9973 && hidden_name_p (TYPE_NAME (t)))
9975 DECL_ANTICIPATED (TYPE_NAME (t)) = 0;
9976 DECL_FRIEND_P (TYPE_NAME (t)) = 0;
9978 if (TYPE_TEMPLATE_INFO (t))
9980 DECL_ANTICIPATED (TYPE_TI_TEMPLATE (t)) = 0;
9981 DECL_FRIEND_P (TYPE_TI_TEMPLATE (t)) = 0;
9986 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, t);
9990 xref_tag_from_type (tree old, tree id, tag_scope scope)
9992 enum tag_types tag_kind;
9994 if (TREE_CODE (old) == RECORD_TYPE)
9995 tag_kind = (CLASSTYPE_DECLARED_CLASS (old) ? class_type : record_type);
9997 tag_kind = union_type;
9999 if (id == NULL_TREE)
10000 id = TYPE_IDENTIFIER (old);
10002 return xref_tag (tag_kind, id, scope, false);
10005 /* Create the binfo hierarchy for REF with (possibly NULL) base list
10006 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
10007 access_* node, and the TREE_VALUE is the type of the base-class.
10008 Non-NULL TREE_TYPE indicates virtual inheritance.
10010 Returns true if the binfo hierarchy was successfully created,
10011 false if an error was detected. */
10014 xref_basetypes (tree ref, tree base_list)
10017 tree binfo, base_binfo;
10018 unsigned max_vbases = 0; /* Maximum direct & indirect virtual bases. */
10019 unsigned max_bases = 0; /* Maximum direct bases. */
10021 tree default_access;
10022 tree igo_prev; /* Track Inheritance Graph Order. */
10024 if (ref == error_mark_node)
10027 /* The base of a derived class is private by default, all others are
10029 default_access = (TREE_CODE (ref) == RECORD_TYPE
10030 && CLASSTYPE_DECLARED_CLASS (ref)
10031 ? access_private_node : access_public_node);
10033 /* First, make sure that any templates in base-classes are
10034 instantiated. This ensures that if we call ourselves recursively
10035 we do not get confused about which classes are marked and which
10037 basep = &base_list;
10040 tree basetype = TREE_VALUE (*basep);
10042 if (!(processing_template_decl && uses_template_parms (basetype))
10043 && !complete_type_or_else (basetype, NULL))
10044 /* An incomplete type. Remove it from the list. */
10045 *basep = TREE_CHAIN (*basep);
10049 if (TREE_TYPE (*basep))
10051 if (CLASS_TYPE_P (basetype))
10052 max_vbases += VEC_length (tree, CLASSTYPE_VBASECLASSES (basetype));
10053 basep = &TREE_CHAIN (*basep);
10057 TYPE_MARKED_P (ref) = 1;
10059 /* The binfo slot should be empty, unless this is an (ill-formed)
10061 gcc_assert (!TYPE_BINFO (ref) || TYPE_SIZE (ref));
10062 gcc_assert (TYPE_MAIN_VARIANT (ref) == ref);
10064 binfo = make_tree_binfo (max_bases);
10066 TYPE_BINFO (ref) = binfo;
10067 BINFO_OFFSET (binfo) = size_zero_node;
10068 BINFO_TYPE (binfo) = ref;
10072 BINFO_BASE_ACCESSES (binfo) = VEC_alloc (tree, gc, max_bases);
10073 /* An aggregate cannot have baseclasses. */
10074 CLASSTYPE_NON_AGGREGATE (ref) = 1;
10076 if (TREE_CODE (ref) == UNION_TYPE)
10078 error ("derived union %qT invalid", ref);
10085 if (TYPE_FOR_JAVA (ref))
10087 error ("Java class %qT cannot have multiple bases", ref);
10094 CLASSTYPE_VBASECLASSES (ref) = VEC_alloc (tree, gc, max_vbases);
10096 if (TYPE_FOR_JAVA (ref))
10098 error ("Java class %qT cannot have virtual bases", ref);
10103 for (igo_prev = binfo; base_list; base_list = TREE_CHAIN (base_list))
10105 tree access = TREE_PURPOSE (base_list);
10106 int via_virtual = TREE_TYPE (base_list) != NULL_TREE;
10107 tree basetype = TREE_VALUE (base_list);
10109 if (access == access_default_node)
10110 access = default_access;
10112 if (PACK_EXPANSION_P (basetype))
10113 basetype = PACK_EXPANSION_PATTERN (basetype);
10114 if (TREE_CODE (basetype) == TYPE_DECL)
10115 basetype = TREE_TYPE (basetype);
10116 if (TREE_CODE (basetype) != RECORD_TYPE
10117 && TREE_CODE (basetype) != TYPENAME_TYPE
10118 && TREE_CODE (basetype) != TEMPLATE_TYPE_PARM
10119 && TREE_CODE (basetype) != BOUND_TEMPLATE_TEMPLATE_PARM)
10121 error ("base type %qT fails to be a struct or class type",
10126 if (TYPE_FOR_JAVA (basetype) && (current_lang_depth () == 0))
10127 TYPE_FOR_JAVA (ref) = 1;
10129 base_binfo = NULL_TREE;
10130 if (CLASS_TYPE_P (basetype) && !dependent_type_p (basetype))
10132 base_binfo = TYPE_BINFO (basetype);
10133 /* The original basetype could have been a typedef'd type. */
10134 basetype = BINFO_TYPE (base_binfo);
10136 /* Inherit flags from the base. */
10137 TYPE_HAS_NEW_OPERATOR (ref)
10138 |= TYPE_HAS_NEW_OPERATOR (basetype);
10139 TYPE_HAS_ARRAY_NEW_OPERATOR (ref)
10140 |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype);
10141 TYPE_GETS_DELETE (ref) |= TYPE_GETS_DELETE (basetype);
10142 TYPE_HAS_CONVERSION (ref) |= TYPE_HAS_CONVERSION (basetype);
10143 CLASSTYPE_DIAMOND_SHAPED_P (ref)
10144 |= CLASSTYPE_DIAMOND_SHAPED_P (basetype);
10145 CLASSTYPE_REPEATED_BASE_P (ref)
10146 |= CLASSTYPE_REPEATED_BASE_P (basetype);
10149 /* We must do this test after we've seen through a typedef
10151 if (TYPE_MARKED_P (basetype))
10153 if (basetype == ref)
10154 error ("recursive type %qT undefined", basetype);
10156 error ("duplicate base type %qT invalid", basetype);
10160 if (PACK_EXPANSION_P (TREE_VALUE (base_list)))
10161 /* Regenerate the pack expansion for the bases. */
10162 basetype = make_pack_expansion (basetype);
10164 TYPE_MARKED_P (basetype) = 1;
10166 base_binfo = copy_binfo (base_binfo, basetype, ref,
10167 &igo_prev, via_virtual);
10168 if (!BINFO_INHERITANCE_CHAIN (base_binfo))
10169 BINFO_INHERITANCE_CHAIN (base_binfo) = binfo;
10171 BINFO_BASE_APPEND (binfo, base_binfo);
10172 BINFO_BASE_ACCESS_APPEND (binfo, access);
10175 if (VEC_space (tree, CLASSTYPE_VBASECLASSES (ref), 1))
10176 /* If we have space in the vbase vector, we must have shared at
10177 least one of them, and are therefore diamond shaped. */
10178 CLASSTYPE_DIAMOND_SHAPED_P (ref) = 1;
10180 /* Unmark all the types. */
10181 for (i = 0; BINFO_BASE_ITERATE (binfo, i, base_binfo); i++)
10182 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
10183 TYPE_MARKED_P (ref) = 0;
10185 /* Now see if we have a repeated base type. */
10186 if (!CLASSTYPE_REPEATED_BASE_P (ref))
10188 for (base_binfo = binfo; base_binfo;
10189 base_binfo = TREE_CHAIN (base_binfo))
10191 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
10193 CLASSTYPE_REPEATED_BASE_P (ref) = 1;
10196 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 1;
10198 for (base_binfo = binfo; base_binfo;
10199 base_binfo = TREE_CHAIN (base_binfo))
10200 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
10201 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
10210 /* Begin compiling the definition of an enumeration type.
10212 Returns the type object, as yet incomplete.
10213 Also records info about it so that build_enumerator
10214 may be used to declare the individual values as they are read. */
10217 start_enum (tree name)
10221 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
10223 /* If this is the real definition for a previous forward reference,
10224 fill in the contents in the same object that used to be the
10225 forward reference. */
10227 enumtype = lookup_and_check_tag (enum_type, name,
10228 /*tag_scope=*/ts_current,
10229 /*template_header_p=*/false);
10231 if (enumtype != NULL_TREE && TREE_CODE (enumtype) == ENUMERAL_TYPE)
10233 error ("multiple definition of %q#T", enumtype);
10234 error ("%Jprevious definition here", TYPE_MAIN_DECL (enumtype));
10235 /* Clear out TYPE_VALUES, and start again. */
10236 TYPE_VALUES (enumtype) = NULL_TREE;
10240 /* In case of error, make a dummy enum to allow parsing to
10242 if (enumtype == error_mark_node)
10243 name = make_anon_name ();
10245 enumtype = make_node (ENUMERAL_TYPE);
10246 enumtype = pushtag (name, enumtype, /*tag_scope=*/ts_current);
10252 /* After processing and defining all the values of an enumeration type,
10253 install their decls in the enumeration type and finish it off.
10254 ENUMTYPE is the type object and VALUES a list of name-value pairs. */
10257 finish_enum (tree enumtype)
10266 bool use_short_enum;
10270 integer_type_kind itk;
10271 tree underlying_type = NULL_TREE;
10273 /* We built up the VALUES in reverse order. */
10274 TYPE_VALUES (enumtype) = nreverse (TYPE_VALUES (enumtype));
10276 /* For an enum defined in a template, just set the type of the values;
10277 all further processing is postponed until the template is
10278 instantiated. We need to set the type so that tsubst of a CONST_DECL
10280 if (processing_template_decl)
10282 for (values = TYPE_VALUES (enumtype);
10284 values = TREE_CHAIN (values))
10285 TREE_TYPE (TREE_VALUE (values)) = enumtype;
10286 if (at_function_scope_p ())
10287 add_stmt (build_min (TAG_DEFN, enumtype));
10291 /* Determine the minimum and maximum values of the enumerators. */
10292 if (TYPE_VALUES (enumtype))
10294 minnode = maxnode = NULL_TREE;
10296 for (values = TYPE_VALUES (enumtype);
10298 values = TREE_CHAIN (values))
10300 decl = TREE_VALUE (values);
10302 /* [dcl.enum]: Following the closing brace of an enum-specifier,
10303 each enumerator has the type of its enumeration. Prior to the
10304 closing brace, the type of each enumerator is the type of its
10305 initializing value. */
10306 TREE_TYPE (decl) = enumtype;
10308 /* Update the minimum and maximum values, if appropriate. */
10309 value = DECL_INITIAL (decl);
10310 if (value == error_mark_node)
10311 value = integer_zero_node;
10312 /* Figure out what the minimum and maximum values of the
10313 enumerators are. */
10315 minnode = maxnode = value;
10316 else if (tree_int_cst_lt (maxnode, value))
10318 else if (tree_int_cst_lt (value, minnode))
10325 If the enumerator-list is empty, the underlying type is as if
10326 the enumeration had a single enumerator with value 0. */
10327 minnode = maxnode = integer_zero_node;
10329 /* Compute the number of bits require to represent all values of the
10330 enumeration. We must do this before the type of MINNODE and
10331 MAXNODE are transformed, since min_precision relies on the
10332 TREE_TYPE of the value it is passed. */
10333 unsignedp = tree_int_cst_sgn (minnode) >= 0;
10334 lowprec = min_precision (minnode, unsignedp);
10335 highprec = min_precision (maxnode, unsignedp);
10336 precision = MAX (lowprec, highprec);
10338 /* Determine the underlying type of the enumeration.
10342 The underlying type of an enumeration is an integral type that
10343 can represent all the enumerator values defined in the
10344 enumeration. It is implementation-defined which integral type is
10345 used as the underlying type for an enumeration except that the
10346 underlying type shall not be larger than int unless the value of
10347 an enumerator cannot fit in an int or unsigned int.
10349 We use "int" or an "unsigned int" as the underlying type, even if
10350 a smaller integral type would work, unless the user has
10351 explicitly requested that we use the smallest possible type. The
10352 user can request that for all enumerations with a command line
10353 flag, or for just one enumeration with an attribute. */
10355 use_short_enum = flag_short_enums
10356 || lookup_attribute ("packed", TYPE_ATTRIBUTES (enumtype));
10358 for (itk = (use_short_enum ? itk_char : itk_int);
10362 underlying_type = integer_types[itk];
10363 if (TYPE_PRECISION (underlying_type) >= precision
10364 && TYPE_UNSIGNED (underlying_type) == unsignedp)
10367 if (itk == itk_none)
10371 IF no integral type can represent all the enumerator values, the
10372 enumeration is ill-formed. */
10373 error ("no integral type can represent all of the enumerator values "
10374 "for %qT", enumtype);
10375 precision = TYPE_PRECISION (long_long_integer_type_node);
10376 underlying_type = integer_types[itk_unsigned_long_long];
10379 /* Compute the minium and maximum values for the type.
10383 For an enumeration where emin is the smallest enumerator and emax
10384 is the largest, the values of the enumeration are the values of the
10385 underlying type in the range bmin to bmax, where bmin and bmax are,
10386 respectively, the smallest and largest values of the smallest bit-
10387 field that can store emin and emax. */
10389 /* The middle-end currently assumes that types with TYPE_PRECISION
10390 narrower than their underlying type are suitably zero or sign
10391 extended to fill their mode. g++ doesn't make these guarantees.
10392 Until the middle-end can represent such paradoxical types, we
10393 set the TYPE_PRECISION to the width of the underlying type. */
10394 TYPE_PRECISION (enumtype) = TYPE_PRECISION (underlying_type);
10396 set_min_and_max_values_for_integral_type (enumtype, precision, unsignedp);
10400 The value of sizeof() applied to an enumeration type, an object
10401 of an enumeration type, or an enumerator, is the value of sizeof()
10402 applied to the underlying type. */
10403 TYPE_SIZE (enumtype) = TYPE_SIZE (underlying_type);
10404 TYPE_SIZE_UNIT (enumtype) = TYPE_SIZE_UNIT (underlying_type);
10405 TYPE_MODE (enumtype) = TYPE_MODE (underlying_type);
10406 TYPE_ALIGN (enumtype) = TYPE_ALIGN (underlying_type);
10407 TYPE_USER_ALIGN (enumtype) = TYPE_USER_ALIGN (underlying_type);
10408 TYPE_UNSIGNED (enumtype) = TYPE_UNSIGNED (underlying_type);
10410 /* Convert each of the enumerators to the type of the underlying
10411 type of the enumeration. */
10412 for (values = TYPE_VALUES (enumtype); values; values = TREE_CHAIN (values))
10414 location_t saved_location;
10416 decl = TREE_VALUE (values);
10417 saved_location = input_location;
10418 input_location = DECL_SOURCE_LOCATION (decl);
10419 value = perform_implicit_conversion (underlying_type,
10420 DECL_INITIAL (decl));
10421 input_location = saved_location;
10423 /* Do not clobber shared ints. */
10424 value = copy_node (value);
10426 TREE_TYPE (value) = enumtype;
10427 DECL_INITIAL (decl) = value;
10428 TREE_VALUE (values) = value;
10431 /* Fix up all variant types of this enum type. */
10432 for (t = TYPE_MAIN_VARIANT (enumtype); t; t = TYPE_NEXT_VARIANT (t))
10434 TYPE_VALUES (t) = TYPE_VALUES (enumtype);
10435 TYPE_MIN_VALUE (t) = TYPE_MIN_VALUE (enumtype);
10436 TYPE_MAX_VALUE (t) = TYPE_MAX_VALUE (enumtype);
10437 TYPE_SIZE (t) = TYPE_SIZE (enumtype);
10438 TYPE_SIZE_UNIT (t) = TYPE_SIZE_UNIT (enumtype);
10439 TYPE_MODE (t) = TYPE_MODE (enumtype);
10440 TYPE_PRECISION (t) = TYPE_PRECISION (enumtype);
10441 TYPE_ALIGN (t) = TYPE_ALIGN (enumtype);
10442 TYPE_USER_ALIGN (t) = TYPE_USER_ALIGN (enumtype);
10443 TYPE_UNSIGNED (t) = TYPE_UNSIGNED (enumtype);
10446 /* Finish debugging output for this type. */
10447 rest_of_type_compilation (enumtype, namespace_bindings_p ());
10450 /* Build and install a CONST_DECL for an enumeration constant of the
10451 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
10452 Assignment of sequential values by default is handled here. */
10455 build_enumerator (tree name, tree value, tree enumtype)
10461 /* If the VALUE was erroneous, pretend it wasn't there; that will
10462 result in the enum being assigned the next value in sequence. */
10463 if (value == error_mark_node)
10466 /* Remove no-op casts from the value. */
10468 STRIP_TYPE_NOPS (value);
10470 if (! processing_template_decl)
10472 /* Validate and default VALUE. */
10473 if (value != NULL_TREE)
10475 value = integral_constant_value (value);
10477 if (TREE_CODE (value) == INTEGER_CST)
10479 value = perform_integral_promotions (value);
10480 constant_expression_warning (value);
10484 error ("enumerator value for %qD is not an integer constant", name);
10489 /* Default based on previous value. */
10490 if (value == NULL_TREE)
10492 if (TYPE_VALUES (enumtype))
10495 unsigned HOST_WIDE_INT lo;
10499 /* The next value is the previous value plus one. We can
10500 safely assume that the previous value is an INTEGER_CST.
10501 add_double doesn't know the type of the target expression,
10502 so we must check with int_fits_type_p as well. */
10503 prev_value = DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype)));
10504 overflowed = add_double (TREE_INT_CST_LOW (prev_value),
10505 TREE_INT_CST_HIGH (prev_value),
10507 value = build_int_cst_wide (TREE_TYPE (prev_value), lo, hi);
10508 overflowed |= !int_fits_type_p (value, TREE_TYPE (prev_value));
10512 error ("overflow in enumeration values at %qD", name);
10513 value = error_mark_node;
10517 value = integer_zero_node;
10520 /* Remove no-op casts from the value. */
10521 STRIP_TYPE_NOPS (value);
10524 /* C++ associates enums with global, function, or class declarations. */
10525 context = current_scope ();
10527 /* Build the actual enumeration constant. Note that the enumeration
10528 constants have the type of their initializers until the
10529 enumeration is complete:
10533 Following the closing brace of an enum-specifier, each enumer-
10534 ator has the type of its enumeration. Prior to the closing
10535 brace, the type of each enumerator is the type of its
10536 initializing value.
10538 In finish_enum we will reset the type. Of course, if we're
10539 processing a template, there may be no value. */
10540 type = value ? TREE_TYPE (value) : NULL_TREE;
10542 if (context && context == current_class_type)
10543 /* This enum declaration is local to the class. We need the full
10544 lang_decl so that we can record DECL_CLASS_CONTEXT, for example. */
10545 decl = build_lang_decl (CONST_DECL, name, type);
10547 /* It's a global enum, or it's local to a function. (Note local to
10548 a function could mean local to a class method. */
10549 decl = build_decl (CONST_DECL, name, type);
10551 DECL_CONTEXT (decl) = FROB_CONTEXT (context);
10552 TREE_CONSTANT (decl) = 1;
10553 TREE_INVARIANT (decl) = 1;
10554 TREE_READONLY (decl) = 1;
10555 DECL_INITIAL (decl) = value;
10557 if (context && context == current_class_type)
10558 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
10559 on the TYPE_FIELDS list for `S'. (That's so that you can say
10560 things like `S::i' later.) */
10561 finish_member_declaration (decl);
10565 /* Add this enumeration constant to the list for this type. */
10566 TYPE_VALUES (enumtype) = tree_cons (name, decl, TYPE_VALUES (enumtype));
10570 /* We're defining DECL. Make sure that it's type is OK. */
10573 check_function_type (tree decl, tree current_function_parms)
10575 tree fntype = TREE_TYPE (decl);
10576 tree return_type = complete_type (TREE_TYPE (fntype));
10578 /* In a function definition, arg types must be complete. */
10579 require_complete_types_for_parms (current_function_parms);
10581 if (dependent_type_p (return_type))
10583 if (!COMPLETE_OR_VOID_TYPE_P (return_type))
10585 tree args = TYPE_ARG_TYPES (fntype);
10587 error ("return type %q#T is incomplete", return_type);
10589 /* Make it return void instead. */
10590 if (TREE_CODE (fntype) == METHOD_TYPE)
10591 fntype = build_method_type_directly (TREE_TYPE (TREE_VALUE (args)),
10593 TREE_CHAIN (args));
10595 fntype = build_function_type (void_type_node, args);
10597 = build_exception_variant (fntype,
10598 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (decl)));
10601 abstract_virtuals_error (decl, TREE_TYPE (fntype));
10604 /* Create the FUNCTION_DECL for a function definition.
10605 DECLSPECS and DECLARATOR are the parts of the declaration;
10606 they describe the function's name and the type it returns,
10607 but twisted together in a fashion that parallels the syntax of C.
10609 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
10610 DECLARATOR is really the DECL for the function we are about to
10611 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
10612 indicating that the function is an inline defined in-class.
10614 This function creates a binding context for the function body
10615 as well as setting up the FUNCTION_DECL in current_function_decl.
10617 For C++, we must first check whether that datum makes any sense.
10618 For example, "class A local_a(1,2);" means that variable local_a
10619 is an aggregate of type A, which should have a constructor
10620 applied to it with the argument list [1, 2].
10622 On entry, DECL_INITIAL (decl1) should be NULL_TREE or error_mark_node,
10623 or may be a BLOCK if the function has been defined previously
10624 in this translation unit. On exit, DECL_INITIAL (decl1) will be
10625 error_mark_node if the function has never been defined, or
10626 a BLOCK if the function has been defined somewhere. */
10629 start_preparsed_function (tree decl1, tree attrs, int flags)
10631 tree ctype = NULL_TREE;
10634 int doing_friend = 0;
10635 struct cp_binding_level *bl;
10636 tree current_function_parms;
10637 struct c_fileinfo *finfo
10638 = get_fileinfo (LOCATION_FILE (DECL_SOURCE_LOCATION (decl1)));
10639 bool honor_interface;
10641 /* Sanity check. */
10642 gcc_assert (TREE_CODE (TREE_VALUE (void_list_node)) == VOID_TYPE);
10643 gcc_assert (TREE_CHAIN (void_list_node) == NULL_TREE);
10645 fntype = TREE_TYPE (decl1);
10646 if (TREE_CODE (fntype) == METHOD_TYPE)
10647 ctype = TYPE_METHOD_BASETYPE (fntype);
10649 /* ISO C++ 11.4/5. A friend function defined in a class is in
10650 the (lexical) scope of the class in which it is defined. */
10651 if (!ctype && DECL_FRIEND_P (decl1))
10653 ctype = DECL_FRIEND_CONTEXT (decl1);
10655 /* CTYPE could be null here if we're dealing with a template;
10656 for example, `inline friend float foo()' inside a template
10657 will have no CTYPE set. */
10658 if (ctype && TREE_CODE (ctype) != RECORD_TYPE)
10664 if (DECL_DECLARED_INLINE_P (decl1)
10665 && lookup_attribute ("noinline", attrs))
10666 warning (0, "inline function %q+D given attribute noinline", decl1);
10668 if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1))
10669 /* This is a constructor, we must ensure that any default args
10670 introduced by this definition are propagated to the clones
10671 now. The clones are used directly in overload resolution. */
10672 adjust_clone_args (decl1);
10674 /* Sometimes we don't notice that a function is a static member, and
10675 build a METHOD_TYPE for it. Fix that up now. */
10676 if (ctype != NULL_TREE && DECL_STATIC_FUNCTION_P (decl1)
10677 && TREE_CODE (TREE_TYPE (decl1)) == METHOD_TYPE)
10679 revert_static_member_fn (decl1);
10683 /* Set up current_class_type, and enter the scope of the class, if
10686 push_nested_class (ctype);
10687 else if (DECL_STATIC_FUNCTION_P (decl1))
10688 push_nested_class (DECL_CONTEXT (decl1));
10690 /* Now that we have entered the scope of the class, we must restore
10691 the bindings for any template parameters surrounding DECL1, if it
10692 is an inline member template. (Order is important; consider the
10693 case where a template parameter has the same name as a field of
10694 the class.) It is not until after this point that
10695 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
10696 if (flags & SF_INCLASS_INLINE)
10697 maybe_begin_member_template_processing (decl1);
10699 /* Effective C++ rule 15. */
10701 && DECL_OVERLOADED_OPERATOR_P (decl1) == NOP_EXPR
10702 && TREE_CODE (TREE_TYPE (fntype)) == VOID_TYPE)
10703 warning (OPT_Weffc__, "%<operator=%> should return a reference to %<*this%>");
10705 /* Make the init_value nonzero so pushdecl knows this is not tentative.
10706 error_mark_node is replaced below (in poplevel) with the BLOCK. */
10707 if (!DECL_INITIAL (decl1))
10708 DECL_INITIAL (decl1) = error_mark_node;
10710 /* This function exists in static storage.
10711 (This does not mean `static' in the C sense!) */
10712 TREE_STATIC (decl1) = 1;
10714 /* We must call push_template_decl after current_class_type is set
10715 up. (If we are processing inline definitions after exiting a
10716 class scope, current_class_type will be NULL_TREE until set above
10717 by push_nested_class.) */
10718 if (processing_template_decl)
10720 /* FIXME: Handle error_mark_node more gracefully. */
10721 tree newdecl1 = push_template_decl (decl1);
10722 if (newdecl1 != error_mark_node)
10726 /* We are now in the scope of the function being defined. */
10727 current_function_decl = decl1;
10729 /* Save the parm names or decls from this function's declarator
10730 where store_parm_decls will find them. */
10731 current_function_parms = DECL_ARGUMENTS (decl1);
10733 /* Make sure the parameter and return types are reasonable. When
10734 you declare a function, these types can be incomplete, but they
10735 must be complete when you define the function. */
10736 check_function_type (decl1, current_function_parms);
10738 /* Build the return declaration for the function. */
10739 restype = TREE_TYPE (fntype);
10740 /* Promote the value to int before returning it. */
10741 if (c_promoting_integer_type_p (restype))
10742 restype = type_promotes_to (restype);
10743 if (DECL_RESULT (decl1) == NULL_TREE)
10747 resdecl = build_decl (RESULT_DECL, 0, TYPE_MAIN_VARIANT (restype));
10748 DECL_ARTIFICIAL (resdecl) = 1;
10749 DECL_IGNORED_P (resdecl) = 1;
10750 DECL_RESULT (decl1) = resdecl;
10752 cp_apply_type_quals_to_decl (cp_type_quals (restype), resdecl);
10755 /* Let the user know we're compiling this function. */
10756 announce_function (decl1);
10758 /* Record the decl so that the function name is defined.
10759 If we already have a decl for this name, and it is a FUNCTION_DECL,
10760 use the old decl. */
10761 if (!processing_template_decl && !(flags & SF_PRE_PARSED))
10763 /* A specialization is not used to guide overload resolution. */
10764 if (!DECL_FUNCTION_MEMBER_P (decl1)
10765 && !(DECL_USE_TEMPLATE (decl1) &&
10766 PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl1))))
10768 tree olddecl = pushdecl (decl1);
10770 if (olddecl == error_mark_node)
10771 /* If something went wrong when registering the declaration,
10772 use DECL1; we have to have a FUNCTION_DECL to use when
10773 parsing the body of the function. */
10777 /* Otherwise, OLDDECL is either a previous declaration
10778 of the same function or DECL1 itself. */
10780 if (warn_missing_declarations
10781 && olddecl == decl1
10782 && !DECL_MAIN_P (decl1)
10783 && TREE_PUBLIC (decl1)
10784 && !DECL_DECLARED_INLINE_P (decl1))
10788 /* Check whether DECL1 is in an anonymous
10790 for (context = DECL_CONTEXT (decl1);
10792 context = DECL_CONTEXT (context))
10794 if (TREE_CODE (context) == NAMESPACE_DECL
10795 && DECL_NAME (context) == NULL_TREE)
10799 if (context == NULL)
10800 warning (OPT_Wmissing_declarations,
10801 "no previous declaration for %q+D", decl1);
10809 /* We need to set the DECL_CONTEXT. */
10810 if (!DECL_CONTEXT (decl1) && DECL_TEMPLATE_INFO (decl1))
10811 DECL_CONTEXT (decl1) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1));
10813 fntype = TREE_TYPE (decl1);
10815 /* If #pragma weak applies, mark the decl appropriately now.
10816 The pragma only applies to global functions. Because
10817 determining whether or not the #pragma applies involves
10818 computing the mangled name for the declaration, we cannot
10819 apply the pragma until after we have merged this declaration
10820 with any previous declarations; if the original declaration
10821 has a linkage specification, that specification applies to
10822 the definition as well, and may affect the mangled name. */
10823 if (!DECL_CONTEXT (decl1))
10824 maybe_apply_pragma_weak (decl1);
10827 /* Reset this in case the call to pushdecl changed it. */
10828 current_function_decl = decl1;
10830 gcc_assert (DECL_INITIAL (decl1));
10832 /* This function may already have been parsed, in which case just
10833 return; our caller will skip over the body without parsing. */
10834 if (DECL_INITIAL (decl1) != error_mark_node)
10837 /* Initialize RTL machinery. We cannot do this until
10838 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
10839 even when processing a template; this is how we get
10840 CFUN set up, and our per-function variables initialized.
10841 FIXME factor out the non-RTL stuff. */
10842 bl = current_binding_level;
10843 allocate_struct_function (decl1);
10844 current_binding_level = bl;
10846 /* Even though we're inside a function body, we still don't want to
10847 call expand_expr to calculate the size of a variable-sized array.
10848 We haven't necessarily assigned RTL to all variables yet, so it's
10849 not safe to try to expand expressions involving them. */
10850 cfun->x_dont_save_pending_sizes_p = 1;
10852 /* Start the statement-tree, start the tree now. */
10853 DECL_SAVED_TREE (decl1) = push_stmt_list ();
10855 /* If we are (erroneously) defining a function that we have already
10856 defined before, wipe out what we knew before. */
10857 if (!DECL_PENDING_INLINE_P (decl1))
10858 DECL_SAVED_FUNCTION_DATA (decl1) = NULL;
10860 if (ctype && !doing_friend && !DECL_STATIC_FUNCTION_P (decl1))
10862 /* We know that this was set up by `grokclassfn'. We do not
10863 wait until `store_parm_decls', since evil parse errors may
10864 never get us to that point. Here we keep the consistency
10865 between `current_class_type' and `current_class_ptr'. */
10866 tree t = DECL_ARGUMENTS (decl1);
10868 gcc_assert (t != NULL_TREE && TREE_CODE (t) == PARM_DECL);
10869 gcc_assert (TREE_CODE (TREE_TYPE (t)) == POINTER_TYPE);
10871 cp_function_chain->x_current_class_ref
10872 = build_indirect_ref (t, NULL);
10873 cp_function_chain->x_current_class_ptr = t;
10875 /* Constructors and destructors need to know whether they're "in
10876 charge" of initializing virtual base classes. */
10877 t = TREE_CHAIN (t);
10878 if (DECL_HAS_IN_CHARGE_PARM_P (decl1))
10880 current_in_charge_parm = t;
10881 t = TREE_CHAIN (t);
10883 if (DECL_HAS_VTT_PARM_P (decl1))
10885 gcc_assert (DECL_NAME (t) == vtt_parm_identifier);
10886 current_vtt_parm = t;
10890 honor_interface = (!DECL_TEMPLATE_INSTANTIATION (decl1)
10891 /* Implicitly-defined methods (like the
10892 destructor for a class in which no destructor
10893 is explicitly declared) must not be defined
10894 until their definition is needed. So, we
10895 ignore interface specifications for
10896 compiler-generated functions. */
10897 && !DECL_ARTIFICIAL (decl1));
10899 if (DECL_INTERFACE_KNOWN (decl1))
10901 tree ctx = decl_function_context (decl1);
10903 if (DECL_NOT_REALLY_EXTERN (decl1))
10904 DECL_EXTERNAL (decl1) = 0;
10906 if (ctx != NULL_TREE && DECL_DECLARED_INLINE_P (ctx)
10907 && TREE_PUBLIC (ctx))
10908 /* This is a function in a local class in an extern inline
10910 comdat_linkage (decl1);
10912 /* If this function belongs to an interface, it is public.
10913 If it belongs to someone else's interface, it is also external.
10914 This only affects inlines and template instantiations. */
10915 else if (!finfo->interface_unknown && honor_interface)
10917 if (DECL_DECLARED_INLINE_P (decl1)
10918 || DECL_TEMPLATE_INSTANTIATION (decl1)
10919 || processing_template_decl)
10921 DECL_EXTERNAL (decl1)
10922 = (finfo->interface_only
10923 || (DECL_DECLARED_INLINE_P (decl1)
10924 && ! flag_implement_inlines
10925 && !DECL_VINDEX (decl1)));
10927 /* For WIN32 we also want to put these in linkonce sections. */
10928 maybe_make_one_only (decl1);
10931 DECL_EXTERNAL (decl1) = 0;
10932 DECL_INTERFACE_KNOWN (decl1) = 1;
10933 /* If this function is in an interface implemented in this file,
10934 make sure that the back end knows to emit this function
10936 if (!DECL_EXTERNAL (decl1))
10937 mark_needed (decl1);
10939 else if (finfo->interface_unknown && finfo->interface_only
10940 && honor_interface)
10942 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
10943 interface, we will have both finfo->interface_unknown and
10944 finfo->interface_only set. In that case, we don't want to
10945 use the normal heuristics because someone will supply a
10946 #pragma implementation elsewhere, and deducing it here would
10947 produce a conflict. */
10948 comdat_linkage (decl1);
10949 DECL_EXTERNAL (decl1) = 0;
10950 DECL_INTERFACE_KNOWN (decl1) = 1;
10951 DECL_DEFER_OUTPUT (decl1) = 1;
10955 /* This is a definition, not a reference.
10956 So clear DECL_EXTERNAL. */
10957 DECL_EXTERNAL (decl1) = 0;
10959 if ((DECL_DECLARED_INLINE_P (decl1)
10960 || DECL_TEMPLATE_INSTANTIATION (decl1))
10961 && ! DECL_INTERFACE_KNOWN (decl1)
10962 /* Don't try to defer nested functions for now. */
10963 && ! decl_function_context (decl1))
10964 DECL_DEFER_OUTPUT (decl1) = 1;
10966 DECL_INTERFACE_KNOWN (decl1) = 1;
10969 /* Determine the ELF visibility attribute for the function. We must not
10970 do this before calling "pushdecl", as we must allow "duplicate_decls"
10971 to merge any attributes appropriately. We also need to wait until
10973 if (!DECL_CLONED_FUNCTION_P (decl1))
10974 determine_visibility (decl1);
10976 begin_scope (sk_function_parms, decl1);
10980 if (DECL_DESTRUCTOR_P (decl1)
10981 || (DECL_CONSTRUCTOR_P (decl1)
10982 && targetm.cxx.cdtor_returns_this ()))
10984 cdtor_label = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
10985 DECL_CONTEXT (cdtor_label) = current_function_decl;
10988 start_fname_decls ();
10990 store_parm_decls (current_function_parms);
10994 /* Like start_preparsed_function, except that instead of a
10995 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
10997 Returns 1 on success. If the DECLARATOR is not suitable for a function
10998 (it defines a datum instead), we return 0, which tells
10999 yyparse to report a parse error. */
11002 start_function (cp_decl_specifier_seq *declspecs,
11003 const cp_declarator *declarator,
11008 decl1 = grokdeclarator (declarator, declspecs, FUNCDEF, 1, &attrs);
11009 /* If the declarator is not suitable for a function definition,
11010 cause a syntax error. */
11011 if (decl1 == NULL_TREE || TREE_CODE (decl1) != FUNCTION_DECL)
11014 if (DECL_MAIN_P (decl1))
11015 /* main must return int. grokfndecl should have corrected it
11016 (and issued a diagnostic) if the user got it wrong. */
11017 gcc_assert (same_type_p (TREE_TYPE (TREE_TYPE (decl1)),
11018 integer_type_node));
11020 start_preparsed_function (decl1, attrs, /*flags=*/SF_DEFAULT);
11025 /* Returns true iff an EH_SPEC_BLOCK should be created in the body of
11029 use_eh_spec_block (tree fn)
11031 return (flag_exceptions && flag_enforce_eh_specs
11032 && !processing_template_decl
11033 && TYPE_RAISES_EXCEPTIONS (TREE_TYPE (fn))
11034 /* We insert the EH_SPEC_BLOCK only in the original
11035 function; then, it is copied automatically to the
11037 && !DECL_CLONED_FUNCTION_P (fn)
11038 /* Implicitly-generated constructors and destructors have
11039 exception specifications. However, those specifications
11040 are the union of the possible exceptions specified by the
11041 constructors/destructors for bases and members, so no
11042 unallowed exception will ever reach this function. By
11043 not creating the EH_SPEC_BLOCK we save a little memory,
11044 and we avoid spurious warnings about unreachable
11046 && !DECL_ARTIFICIAL (fn));
11049 /* Store the parameter declarations into the current function declaration.
11050 This is called after parsing the parameter declarations, before
11051 digesting the body of the function.
11053 Also install to binding contour return value identifier, if any. */
11056 store_parm_decls (tree current_function_parms)
11058 tree fndecl = current_function_decl;
11061 /* This is a chain of any other decls that came in among the parm
11062 declarations. If a parm is declared with enum {foo, bar} x;
11063 then CONST_DECLs for foo and bar are put here. */
11064 tree nonparms = NULL_TREE;
11066 if (current_function_parms)
11068 /* This case is when the function was defined with an ANSI prototype.
11069 The parms already have decls, so we need not do anything here
11070 except record them as in effect
11071 and complain if any redundant old-style parm decls were written. */
11073 tree specparms = current_function_parms;
11076 /* Must clear this because it might contain TYPE_DECLs declared
11078 current_binding_level->names = NULL;
11080 /* If we're doing semantic analysis, then we'll call pushdecl
11081 for each of these. We must do them in reverse order so that
11082 they end in the correct forward order. */
11083 specparms = nreverse (specparms);
11085 for (parm = specparms; parm; parm = next)
11087 next = TREE_CHAIN (parm);
11088 if (TREE_CODE (parm) == PARM_DECL)
11090 if (DECL_NAME (parm) == NULL_TREE
11091 || TREE_CODE (parm) != VOID_TYPE)
11094 error ("parameter %qD declared void", parm);
11098 /* If we find an enum constant or a type tag,
11099 put it aside for the moment. */
11100 TREE_CHAIN (parm) = NULL_TREE;
11101 nonparms = chainon (nonparms, parm);
11105 /* Get the decls in their original chain order and record in the
11106 function. This is all and only the PARM_DECLs that were
11107 pushed into scope by the loop above. */
11108 DECL_ARGUMENTS (fndecl) = getdecls ();
11111 DECL_ARGUMENTS (fndecl) = NULL_TREE;
11113 /* Now store the final chain of decls for the arguments
11114 as the decl-chain of the current lexical scope.
11115 Put the enumerators in as well, at the front so that
11116 DECL_ARGUMENTS is not modified. */
11117 current_binding_level->names = chainon (nonparms, DECL_ARGUMENTS (fndecl));
11119 if (use_eh_spec_block (current_function_decl))
11120 current_eh_spec_block = begin_eh_spec_block ();
11124 /* We have finished doing semantic analysis on DECL, but have not yet
11125 generated RTL for its body. Save away our current state, so that
11126 when we want to generate RTL later we know what to do. */
11129 save_function_data (tree decl)
11131 struct language_function *f;
11133 /* Save the language-specific per-function data so that we can
11134 get it back when we really expand this function. */
11135 gcc_assert (!DECL_PENDING_INLINE_P (decl));
11138 f = GGC_NEW (struct language_function);
11139 memcpy (f, cp_function_chain, sizeof (struct language_function));
11140 DECL_SAVED_FUNCTION_DATA (decl) = f;
11142 /* Clear out the bits we don't need. */
11143 f->base.x_stmt_tree.x_cur_stmt_list = NULL_TREE;
11144 f->bindings = NULL;
11145 f->x_local_names = NULL;
11149 /* Set the return value of the constructor (if present). */
11152 finish_constructor_body (void)
11157 if (targetm.cxx.cdtor_returns_this ())
11159 /* Any return from a constructor will end up here. */
11160 add_stmt (build_stmt (LABEL_EXPR, cdtor_label));
11162 val = DECL_ARGUMENTS (current_function_decl);
11163 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
11164 DECL_RESULT (current_function_decl), val);
11165 /* Return the address of the object. */
11166 exprstmt = build_stmt (RETURN_EXPR, val);
11167 add_stmt (exprstmt);
11171 /* Do all the processing for the beginning of a destructor; set up the
11172 vtable pointers and cleanups for bases and members. */
11175 begin_destructor_body (void)
11177 tree compound_stmt;
11179 /* If the CURRENT_CLASS_TYPE is incomplete, we will have already
11180 issued an error message. We still want to try to process the
11181 body of the function, but initialize_vtbl_ptrs will crash if
11182 TYPE_BINFO is NULL. */
11183 if (COMPLETE_TYPE_P (current_class_type))
11185 compound_stmt = begin_compound_stmt (0);
11186 /* Make all virtual function table pointers in non-virtual base
11187 classes point to CURRENT_CLASS_TYPE's virtual function
11189 initialize_vtbl_ptrs (current_class_ptr);
11190 finish_compound_stmt (compound_stmt);
11192 /* And insert cleanups for our bases and members so that they
11193 will be properly destroyed if we throw. */
11194 push_base_cleanups ();
11198 /* At the end of every destructor we generate code to delete the object if
11199 necessary. Do that now. */
11202 finish_destructor_body (void)
11206 /* Any return from a destructor will end up here; that way all base
11207 and member cleanups will be run when the function returns. */
11208 add_stmt (build_stmt (LABEL_EXPR, cdtor_label));
11210 /* In a virtual destructor, we must call delete. */
11211 if (DECL_VIRTUAL_P (current_function_decl))
11214 tree virtual_size = cxx_sizeof (current_class_type);
11218 At the point of definition of a virtual destructor (including
11219 an implicit definition), non-placement operator delete shall
11220 be looked up in the scope of the destructor's class and if
11221 found shall be accessible and unambiguous. */
11222 exprstmt = build_op_delete_call(DELETE_EXPR, current_class_ptr,
11224 /*global_p=*/false,
11225 /*placement=*/NULL_TREE,
11226 /*alloc_fn=*/NULL_TREE);
11228 if_stmt = begin_if_stmt ();
11229 finish_if_stmt_cond (build2 (BIT_AND_EXPR, integer_type_node,
11230 current_in_charge_parm,
11233 finish_expr_stmt (exprstmt);
11234 finish_then_clause (if_stmt);
11235 finish_if_stmt (if_stmt);
11238 if (targetm.cxx.cdtor_returns_this ())
11242 val = DECL_ARGUMENTS (current_function_decl);
11243 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
11244 DECL_RESULT (current_function_decl), val);
11245 /* Return the address of the object. */
11246 exprstmt = build_stmt (RETURN_EXPR, val);
11247 add_stmt (exprstmt);
11251 /* Do the necessary processing for the beginning of a function body, which
11252 in this case includes member-initializers, but not the catch clauses of
11253 a function-try-block. Currently, this means opening a binding level
11254 for the member-initializers (in a ctor) and member cleanups (in a dtor). */
11257 begin_function_body (void)
11261 if (! FUNCTION_NEEDS_BODY_BLOCK (current_function_decl))
11264 if (processing_template_decl)
11265 /* Do nothing now. */;
11267 /* Always keep the BLOCK node associated with the outermost pair of
11268 curly braces of a function. These are needed for correct
11269 operation of dwarfout.c. */
11270 keep_next_level (true);
11272 stmt = begin_compound_stmt (BCS_FN_BODY);
11274 if (processing_template_decl)
11275 /* Do nothing now. */;
11276 else if (DECL_DESTRUCTOR_P (current_function_decl))
11277 begin_destructor_body ();
11282 /* Do the processing for the end of a function body. Currently, this means
11283 closing out the cleanups for fully-constructed bases and members, and in
11284 the case of the destructor, deleting the object if desired. Again, this
11285 is only meaningful for [cd]tors, since they are the only functions where
11286 there is a significant distinction between the main body and any
11287 function catch clauses. Handling, say, main() return semantics here
11288 would be wrong, as flowing off the end of a function catch clause for
11289 main() would also need to return 0. */
11292 finish_function_body (tree compstmt)
11294 if (compstmt == NULL_TREE)
11297 /* Close the block. */
11298 finish_compound_stmt (compstmt);
11300 if (processing_template_decl)
11301 /* Do nothing now. */;
11302 else if (DECL_CONSTRUCTOR_P (current_function_decl))
11303 finish_constructor_body ();
11304 else if (DECL_DESTRUCTOR_P (current_function_decl))
11305 finish_destructor_body ();
11308 /* Given a function, returns the BLOCK corresponding to the outermost level
11309 of curly braces, skipping the artificial block created for constructor
11313 outer_curly_brace_block (tree fndecl)
11315 tree block = BLOCK_SUBBLOCKS (DECL_INITIAL (fndecl));
11316 if (FUNCTION_NEEDS_BODY_BLOCK (current_function_decl))
11317 /* Skip the artificial function body block. */
11318 block = BLOCK_SUBBLOCKS (block);
11322 /* Finish up a function declaration and compile that function
11323 all the way to assembler language output. The free the storage
11324 for the function definition.
11326 FLAGS is a bitwise or of the following values:
11328 We just finished processing the body of an in-class inline
11329 function definition. (This processing will have taken place
11330 after the class definition is complete.) */
11333 finish_function (int flags)
11335 tree fndecl = current_function_decl;
11336 tree fntype, ctype = NULL_TREE;
11337 int inclass_inline = (flags & 2) != 0;
11340 /* When we get some parse errors, we can end up without a
11341 current_function_decl, so cope. */
11342 if (fndecl == NULL_TREE)
11343 return error_mark_node;
11345 if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fndecl)
11346 && DECL_VIRTUAL_P (fndecl)
11347 && !processing_template_decl)
11349 tree fnclass = DECL_CONTEXT (fndecl);
11350 if (fndecl == CLASSTYPE_KEY_METHOD (fnclass))
11351 keyed_classes = tree_cons (NULL_TREE, fnclass, keyed_classes);
11354 nested = function_depth > 1;
11355 fntype = TREE_TYPE (fndecl);
11357 /* TREE_READONLY (fndecl) = 1;
11358 This caused &foo to be of type ptr-to-const-function
11359 which then got a warning when stored in a ptr-to-function variable. */
11361 gcc_assert (building_stmt_tree ());
11362 /* The current function is being defined, so its DECL_INITIAL should
11363 be set, and unless there's a multiple definition, it should be
11364 error_mark_node. */
11365 gcc_assert (DECL_INITIAL (fndecl) == error_mark_node);
11367 /* For a cloned function, we've already got all the code we need;
11368 there's no need to add any extra bits. */
11369 if (!DECL_CLONED_FUNCTION_P (fndecl))
11371 if (DECL_MAIN_P (current_function_decl))
11375 /* Make it so that `main' always returns 0 by default (or
11378 stmt = finish_return_stmt (integer_one_node);
11380 stmt = finish_return_stmt (integer_zero_node);
11382 /* Hack. We don't want the middle-end to warn that this
11383 return is unreachable, so put the statement on the
11385 #ifdef USE_MAPPED_LOCATION
11386 SET_EXPR_LOCATION (stmt, UNKNOWN_LOCATION);
11388 annotate_with_file_line (stmt, input_filename, 0);
11392 if (use_eh_spec_block (current_function_decl))
11393 finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
11394 (TREE_TYPE (current_function_decl)),
11395 current_eh_spec_block);
11398 /* If we're saving up tree structure, tie off the function now. */
11399 DECL_SAVED_TREE (fndecl) = pop_stmt_list (DECL_SAVED_TREE (fndecl));
11401 finish_fname_decls ();
11403 /* If this function can't throw any exceptions, remember that. */
11404 if (!processing_template_decl
11405 && !cp_function_chain->can_throw
11406 && !flag_non_call_exceptions
11407 && !DECL_REPLACEABLE_P (fndecl))
11408 TREE_NOTHROW (fndecl) = 1;
11410 /* This must come after expand_function_end because cleanups might
11411 have declarations (from inline functions) that need to go into
11412 this function's blocks. */
11414 /* If the current binding level isn't the outermost binding level
11415 for this function, either there is a bug, or we have experienced
11416 syntax errors and the statement tree is malformed. */
11417 if (current_binding_level->kind != sk_function_parms)
11419 /* Make sure we have already experienced errors. */
11420 gcc_assert (errorcount);
11422 /* Throw away the broken statement tree and extra binding
11424 DECL_SAVED_TREE (fndecl) = alloc_stmt_list ();
11426 while (current_binding_level->kind != sk_function_parms)
11428 if (current_binding_level->kind == sk_class)
11429 pop_nested_class ();
11431 poplevel (0, 0, 0);
11434 poplevel (1, 0, 1);
11436 /* Statements should always be full-expressions at the outermost set
11437 of curly braces for a function. */
11438 gcc_assert (stmts_are_full_exprs_p ());
11440 /* Set up the named return value optimization, if we can. Candidate
11441 variables are selected in check_return_value. */
11442 if (current_function_return_value)
11444 tree r = current_function_return_value;
11447 if (r != error_mark_node
11448 /* This is only worth doing for fns that return in memory--and
11449 simpler, since we don't have to worry about promoted modes. */
11450 && aggregate_value_p (TREE_TYPE (TREE_TYPE (fndecl)), fndecl)
11451 /* Only allow this for variables declared in the outer scope of
11452 the function so we know that their lifetime always ends with a
11453 return; see g++.dg/opt/nrv6.C. We could be more flexible if
11454 we were to do this optimization in tree-ssa. */
11455 && (outer = outer_curly_brace_block (fndecl))
11456 && chain_member (r, BLOCK_VARS (outer)))
11457 finalize_nrv (&DECL_SAVED_TREE (fndecl), r, DECL_RESULT (fndecl));
11459 current_function_return_value = NULL_TREE;
11462 /* Remember that we were in class scope. */
11463 if (current_class_name)
11464 ctype = current_class_type;
11466 /* Must mark the RESULT_DECL as being in this function. */
11467 DECL_CONTEXT (DECL_RESULT (fndecl)) = fndecl;
11469 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
11470 to the FUNCTION_DECL node itself. */
11471 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl)) = fndecl;
11473 /* Save away current state, if appropriate. */
11474 if (!processing_template_decl)
11475 save_function_data (fndecl);
11477 /* Complain if there's just no return statement. */
11478 if (warn_return_type
11479 && TREE_CODE (TREE_TYPE (fntype)) != VOID_TYPE
11480 && !dependent_type_p (TREE_TYPE (fntype))
11481 && !current_function_returns_value && !current_function_returns_null
11482 /* Don't complain if we abort or throw. */
11483 && !current_function_returns_abnormally
11484 && !DECL_NAME (DECL_RESULT (fndecl))
11485 /* Normally, with -Wreturn-type, flow will complain. Unless we're an
11486 inline function, as we might never be compiled separately. */
11487 && (DECL_INLINE (fndecl) || processing_template_decl)
11488 /* Structor return values (if any) are set by the compiler. */
11489 && !DECL_CONSTRUCTOR_P (fndecl)
11490 && !DECL_DESTRUCTOR_P (fndecl))
11491 warning (OPT_Wreturn_type, "no return statement in function returning non-void");
11493 /* Store the end of the function, so that we get good line number
11494 info for the epilogue. */
11495 cfun->function_end_locus = input_location;
11497 /* Genericize before inlining. */
11498 if (!processing_template_decl)
11500 struct language_function *f = DECL_SAVED_FUNCTION_DATA (fndecl);
11501 cp_genericize (fndecl);
11502 /* Clear out the bits we don't need. */
11503 f->x_current_class_ptr = NULL;
11504 f->x_current_class_ref = NULL;
11505 f->x_eh_spec_block = NULL;
11506 f->x_in_charge_parm = NULL;
11507 f->x_vtt_parm = NULL;
11508 f->x_return_value = NULL;
11509 f->bindings = NULL;
11510 f->extern_decl_map = NULL;
11512 /* Handle attribute((warn_unused_result)). Relies on gimple input. */
11513 c_warn_unused_result (&DECL_SAVED_TREE (fndecl));
11515 /* Clear out the bits we don't need. */
11516 local_names = NULL;
11518 /* We're leaving the context of this function, so zap cfun. It's still in
11519 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
11521 current_function_decl = NULL;
11523 /* If this is an in-class inline definition, we may have to pop the
11524 bindings for the template parameters that we added in
11525 maybe_begin_member_template_processing when start_function was
11527 if (inclass_inline)
11528 maybe_end_member_template_processing ();
11530 /* Leave the scope of the class. */
11532 pop_nested_class ();
11538 /* Let the error reporting routines know that we're outside a
11539 function. For a nested function, this value is used in
11540 cxx_pop_function_context and then reset via pop_function_context. */
11541 current_function_decl = NULL_TREE;
11546 /* Create the FUNCTION_DECL for a function definition.
11547 DECLSPECS and DECLARATOR are the parts of the declaration;
11548 they describe the return type and the name of the function,
11549 but twisted together in a fashion that parallels the syntax of C.
11551 This function creates a binding context for the function body
11552 as well as setting up the FUNCTION_DECL in current_function_decl.
11554 Returns a FUNCTION_DECL on success.
11556 If the DECLARATOR is not suitable for a function (it defines a datum
11557 instead), we return 0, which tells yyparse to report a parse error.
11559 May return void_type_node indicating that this method is actually
11560 a friend. See grokfield for more details.
11562 Came here with a `.pushlevel' .
11564 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
11565 CHANGES TO CODE IN `grokfield'. */
11568 start_method (cp_decl_specifier_seq *declspecs,
11569 const cp_declarator *declarator, tree attrlist)
11571 tree fndecl = grokdeclarator (declarator, declspecs, MEMFUNCDEF, 0,
11574 if (fndecl == error_mark_node)
11575 return error_mark_node;
11577 if (fndecl == NULL || TREE_CODE (fndecl) != FUNCTION_DECL)
11579 error ("invalid member function declaration");
11580 return error_mark_node;
11584 cplus_decl_attributes (&fndecl, attrlist, 0);
11586 /* Pass friends other than inline friend functions back. */
11587 if (fndecl == void_type_node)
11590 if (DECL_IN_AGGR_P (fndecl))
11592 if (DECL_CONTEXT (fndecl)
11593 && TREE_CODE (DECL_CONTEXT (fndecl)) != NAMESPACE_DECL)
11594 error ("%qD is already defined in class %qT", fndecl,
11595 DECL_CONTEXT (fndecl));
11596 return error_mark_node;
11599 check_template_shadow (fndecl);
11601 DECL_DECLARED_INLINE_P (fndecl) = 1;
11602 if (flag_default_inline)
11603 DECL_INLINE (fndecl) = 1;
11605 /* We process method specializations in finish_struct_1. */
11606 if (processing_template_decl && !DECL_TEMPLATE_SPECIALIZATION (fndecl))
11608 fndecl = push_template_decl (fndecl);
11609 if (fndecl == error_mark_node)
11613 if (! DECL_FRIEND_P (fndecl))
11615 if (TREE_CHAIN (fndecl))
11617 fndecl = copy_node (fndecl);
11618 TREE_CHAIN (fndecl) = NULL_TREE;
11622 finish_decl (fndecl, NULL_TREE, NULL_TREE);
11624 /* Make a place for the parms. */
11625 begin_scope (sk_function_parms, fndecl);
11627 DECL_IN_AGGR_P (fndecl) = 1;
11631 /* Go through the motions of finishing a function definition.
11632 We don't compile this method until after the whole class has
11635 FINISH_METHOD must return something that looks as though it
11636 came from GROKFIELD (since we are defining a method, after all).
11638 This is called after parsing the body of the function definition.
11639 STMTS is the chain of statements that makes up the function body.
11641 DECL is the ..._DECL that `start_method' provided. */
11644 finish_method (tree decl)
11646 tree fndecl = decl;
11651 if (decl == void_type_node)
11654 old_initial = DECL_INITIAL (fndecl);
11656 /* Undo the level for the parms (from start_method).
11657 This is like poplevel, but it causes nothing to be
11658 saved. Saving information here confuses symbol-table
11659 output routines. Besides, this information will
11660 be correctly output when this method is actually
11663 /* Clear out the meanings of the local variables of this level;
11664 also record in each decl which block it belongs to. */
11666 for (link = current_binding_level->names; link; link = TREE_CHAIN (link))
11668 if (DECL_NAME (link) != NULL_TREE)
11669 pop_binding (DECL_NAME (link), link);
11670 gcc_assert (TREE_CODE (link) != FUNCTION_DECL);
11671 DECL_CONTEXT (link) = NULL_TREE;
11674 poplevel (0, 0, 0);
11676 DECL_INITIAL (fndecl) = old_initial;
11678 /* We used to check if the context of FNDECL was different from
11679 current_class_type as another way to get inside here. This didn't work
11680 for String.cc in libg++. */
11681 if (DECL_FRIEND_P (fndecl))
11683 VEC_safe_push (tree, gc, CLASSTYPE_INLINE_FRIENDS (current_class_type),
11685 decl = void_type_node;
11692 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
11693 we can lay it out later, when and if its type becomes complete. */
11696 maybe_register_incomplete_var (tree var)
11698 gcc_assert (TREE_CODE (var) == VAR_DECL);
11700 /* Keep track of variables with incomplete types. */
11701 if (!processing_template_decl && TREE_TYPE (var) != error_mark_node
11702 && DECL_EXTERNAL (var))
11704 tree inner_type = TREE_TYPE (var);
11706 while (TREE_CODE (inner_type) == ARRAY_TYPE)
11707 inner_type = TREE_TYPE (inner_type);
11708 inner_type = TYPE_MAIN_VARIANT (inner_type);
11710 if ((!COMPLETE_TYPE_P (inner_type) && CLASS_TYPE_P (inner_type))
11711 /* RTTI TD entries are created while defining the type_info. */
11712 || (TYPE_LANG_SPECIFIC (inner_type)
11713 && TYPE_BEING_DEFINED (inner_type)))
11714 incomplete_vars = tree_cons (inner_type, var, incomplete_vars);
11718 /* Called when a class type (given by TYPE) is defined. If there are
11719 any existing VAR_DECLs whose type hsa been completed by this
11720 declaration, update them now. */
11723 complete_vars (tree type)
11725 tree *list = &incomplete_vars;
11727 gcc_assert (CLASS_TYPE_P (type));
11730 if (same_type_p (type, TREE_PURPOSE (*list)))
11732 tree var = TREE_VALUE (*list);
11733 tree type = TREE_TYPE (var);
11734 /* Complete the type of the variable. The VAR_DECL itself
11735 will be laid out in expand_expr. */
11736 complete_type (type);
11737 cp_apply_type_quals_to_decl (cp_type_quals (type), var);
11738 /* Remove this entry from the list. */
11739 *list = TREE_CHAIN (*list);
11742 list = &TREE_CHAIN (*list);
11745 /* Check for pending declarations which may have abstract type. */
11746 complete_type_check_abstract (type);
11749 /* If DECL is of a type which needs a cleanup, build and return an
11750 expression to perform that cleanup here. Return NULL_TREE if no
11751 cleanup need be done. */
11754 cxx_maybe_build_cleanup (tree decl)
11760 /* Assume no cleanup is required. */
11761 cleanup = NULL_TREE;
11763 if (error_operand_p (decl))
11766 /* Handle "__attribute__((cleanup))". We run the cleanup function
11767 before the destructor since the destructor is what actually
11768 terminates the lifetime of the object. */
11769 attr = lookup_attribute ("cleanup", DECL_ATTRIBUTES (decl));
11776 /* Get the name specified by the user for the cleanup function. */
11777 id = TREE_VALUE (TREE_VALUE (attr));
11778 /* Look up the name to find the cleanup function to call. It is
11779 important to use lookup_name here because that is what is
11780 used in c-common.c:handle_cleanup_attribute when performing
11781 initial checks on the attribute. Note that those checks
11782 include ensuring that the function found is not an overloaded
11783 function, or an object with an overloaded call operator,
11784 etc.; we can rely on the fact that the functionfound is an
11785 ordinary FUNCTION_DECL. */
11786 fn = lookup_name (id);
11787 arg = build_address (decl);
11789 cleanup = build_function_call (fn, build_tree_list (NULL_TREE,
11792 /* Handle ordinary C++ destructors. */
11793 type = TREE_TYPE (decl);
11794 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
11796 int flags = LOOKUP_NORMAL|LOOKUP_DESTRUCTOR;
11797 bool has_vbases = (TREE_CODE (type) == RECORD_TYPE
11798 && CLASSTYPE_VBASECLASSES (type));
11802 if (TREE_CODE (type) == ARRAY_TYPE)
11806 cxx_mark_addressable (decl);
11807 addr = build_unary_op (ADDR_EXPR, decl, 0);
11810 /* Optimize for space over speed here. */
11811 if (!has_vbases || flag_expensive_optimizations)
11812 flags |= LOOKUP_NONVIRTUAL;
11814 call = build_delete (TREE_TYPE (addr), addr,
11815 sfk_complete_destructor, flags, 0);
11817 cleanup = build_compound_expr (cleanup, call);
11825 /* When a stmt has been parsed, this function is called. */
11832 /* DECL was originally constructed as a non-static member function,
11833 but turned out to be static. Update it accordingly. */
11836 revert_static_member_fn (tree decl)
11839 tree function = TREE_TYPE (decl);
11840 tree args = TYPE_ARG_TYPES (function);
11842 if (cp_type_quals (TREE_TYPE (TREE_VALUE (args)))
11843 != TYPE_UNQUALIFIED)
11844 error ("static member function %q#D declared with type qualifiers", decl);
11846 args = TREE_CHAIN (args);
11847 tmp = build_function_type (TREE_TYPE (function), args);
11848 tmp = build_qualified_type (tmp, cp_type_quals (function));
11849 tmp = build_exception_variant (tmp,
11850 TYPE_RAISES_EXCEPTIONS (function));
11851 TREE_TYPE (decl) = tmp;
11852 if (DECL_ARGUMENTS (decl))
11853 DECL_ARGUMENTS (decl) = TREE_CHAIN (DECL_ARGUMENTS (decl));
11854 DECL_STATIC_FUNCTION_P (decl) = 1;
11857 /* Initialize the variables used during compilation of a C++
11861 cxx_push_function_context (struct function * f)
11863 struct language_function *p = GGC_CNEW (struct language_function);
11866 /* Whenever we start a new function, we destroy temporaries in the
11868 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
11874 if (DECL_SAVED_FUNCTION_DATA (fn))
11876 /* If we already parsed this function, and we're just expanding it
11877 now, restore saved state. */
11878 *cp_function_chain = *DECL_SAVED_FUNCTION_DATA (fn);
11880 /* We don't need the saved data anymore. Unless this is an inline
11881 function; we need the named return value info for
11882 declare_return_variable. */
11883 if (! DECL_INLINE (fn))
11884 DECL_SAVED_FUNCTION_DATA (fn) = NULL;
11889 /* Free the language-specific parts of F, now that we've finished
11890 compiling the function. */
11893 cxx_pop_function_context (struct function * f)
11898 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
11899 one of the language-independent trees. */
11901 enum cp_tree_node_structure_enum
11902 cp_tree_node_structure (union lang_tree_node * t)
11904 switch (TREE_CODE (&t->generic))
11906 case DEFAULT_ARG: return TS_CP_DEFAULT_ARG;
11907 case IDENTIFIER_NODE: return TS_CP_IDENTIFIER;
11908 case OVERLOAD: return TS_CP_OVERLOAD;
11909 case TEMPLATE_PARM_INDEX: return TS_CP_TPI;
11910 case TINST_LEVEL: return TS_CP_TINST_LEVEL;
11911 case PTRMEM_CST: return TS_CP_PTRMEM;
11912 case BASELINK: return TS_CP_BASELINK;
11913 case STATIC_ASSERT: return TS_CP_STATIC_ASSERT;
11914 case ARGUMENT_PACK_SELECT: return TS_CP_ARGUMENT_PACK_SELECT;
11915 case TRAIT_EXPR: return TS_CP_TRAIT_EXPR;
11916 default: return TS_CP_GENERIC;
11920 /* Build the void_list_node (void_type_node having been created). */
11922 build_void_list_node (void)
11924 tree t = build_tree_list (NULL_TREE, void_type_node);
11929 cp_missing_noreturn_ok_p (tree decl)
11931 /* A missing noreturn is ok for the `main' function. */
11932 return DECL_MAIN_P (decl);
11935 /* Return the COMDAT group into which DECL should be placed. */
11938 cxx_comdat_group (tree decl)
11942 /* Virtual tables, construction virtual tables, and virtual table
11943 tables all go in a single COMDAT group, named after the primary
11945 if (TREE_CODE (decl) == VAR_DECL && DECL_VTABLE_OR_VTT_P (decl))
11946 name = DECL_ASSEMBLER_NAME (CLASSTYPE_VTABLES (DECL_CONTEXT (decl)));
11947 /* For all other DECLs, the COMDAT group is the mangled name of the
11948 declaration itself. */
11951 while (DECL_THUNK_P (decl))
11953 /* If TARGET_USE_LOCAL_THUNK_ALIAS_P, use_thunk puts the thunk
11954 into the same section as the target function. In that case
11955 we must return target's name. */
11956 tree target = THUNK_TARGET (decl);
11957 if (TARGET_USE_LOCAL_THUNK_ALIAS_P (target)
11958 && DECL_SECTION_NAME (target) != NULL
11959 && DECL_ONE_ONLY (target))
11964 name = DECL_ASSEMBLER_NAME (decl);
11967 return IDENTIFIER_POINTER (name);
11970 #include "gt-cp-decl.h"