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 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"
56 static tree grokparms (cp_parameter_declarator *, tree *);
57 static const char *redeclaration_error_message (tree, tree);
59 static int decl_jump_unsafe (tree);
60 static void require_complete_types_for_parms (tree);
61 static int ambi_op_p (enum tree_code);
62 static int unary_op_p (enum tree_code);
63 static void push_local_name (tree);
64 static tree grok_reference_init (tree, tree, tree, tree *);
65 static tree grokvardecl (tree, tree, const cp_decl_specifier_seq *,
67 static void record_unknown_type (tree, const char *);
68 static tree builtin_function_1 (tree, tree);
69 static tree build_library_fn_1 (tree, enum tree_code, tree);
70 static int member_function_or_else (tree, tree, enum overload_flags);
71 static void bad_specifiers (tree, const char *, int, int, int, int,
73 static void check_for_uninitialized_const_var (tree);
74 static hashval_t typename_hash (const void *);
75 static int typename_compare (const void *, const void *);
76 static tree local_variable_p_walkfn (tree *, int *, void *);
77 static tree record_builtin_java_type (const char *, int);
78 static const char *tag_name (enum tag_types);
79 static tree lookup_and_check_tag (enum tag_types, tree, tag_scope, bool);
80 static int walk_namespaces_r (tree, walk_namespaces_fn, void *);
81 static void maybe_deduce_size_from_array_init (tree, tree);
82 static void layout_var_decl (tree);
83 static void maybe_commonize_var (tree);
84 static tree check_initializer (tree, tree, int, tree *);
85 static void make_rtl_for_nonlocal_decl (tree, tree, const char *);
86 static void save_function_data (tree);
87 static void check_function_type (tree, tree);
88 static void finish_constructor_body (void);
89 static void begin_destructor_body (void);
90 static void finish_destructor_body (void);
91 static tree create_array_type_for_decl (tree, tree, tree);
92 static tree get_atexit_node (void);
93 static tree get_dso_handle_node (void);
94 static tree start_cleanup_fn (void);
95 static void end_cleanup_fn (void);
96 static tree cp_make_fname_decl (tree, int);
97 static void initialize_predefined_identifiers (void);
98 static tree check_special_function_return_type
99 (special_function_kind, tree, tree);
100 static tree push_cp_library_fn (enum tree_code, tree);
101 static tree build_cp_library_fn (tree, enum tree_code, tree);
102 static void store_parm_decls (tree);
103 static void initialize_local_var (tree, tree);
104 static void expand_static_init (tree, tree);
105 static tree next_initializable_field (tree);
107 /* The following symbols are subsumed in the cp_global_trees array, and
108 listed here individually for documentation purposes.
111 tree wchar_decl_node;
113 tree vtable_entry_type;
114 tree delta_type_node;
115 tree __t_desc_type_node;
117 tree class_type_node;
118 tree unknown_type_node;
120 Array type `vtable_entry_type[]'
123 tree vtbl_ptr_type_node;
130 A FUNCTION_DECL which can call `abort'. Not necessarily the
131 one that the user will declare, but sufficient to be called
132 by routines that want to abort the program.
136 The FUNCTION_DECL for the default `::operator delete'.
138 tree global_delete_fndecl;
141 tree type_info_type_node, tinfo_decl_id, tinfo_decl_type;
142 tree tinfo_var_id; */
144 tree cp_global_trees[CPTI_MAX];
146 /* Indicates that there is a type value in some namespace, although
147 that is not necessarily in scope at the moment. */
149 tree global_type_node;
151 /* The node that holds the "name" of the global scope. */
152 tree global_scope_name;
154 #define local_names cp_function_chain->x_local_names
156 /* A list of objects which have constructors or destructors
157 which reside in the global scope. The decl is stored in
158 the TREE_VALUE slot and the initializer is stored
159 in the TREE_PURPOSE slot. */
160 tree static_aggregates;
164 /* A node for the integer constants 2, and 3. */
166 tree integer_two_node, integer_three_node;
168 /* Used only for jumps to as-yet undefined labels, since jumps to
169 defined labels can have their validity checked immediately. */
171 struct named_label_use_entry GTY(())
173 struct named_label_use_entry *next;
174 /* The binding level to which this entry is *currently* attached.
175 This is initially the binding level in which the goto appeared,
176 but is modified as scopes are closed. */
177 struct cp_binding_level *binding_level;
178 /* The head of the names list that was current when the goto appeared,
179 or the inner scope popped. These are the decls that will *not* be
180 skipped when jumping to the label. */
182 /* The location of the goto, for error reporting. */
183 location_t o_goto_locus;
184 /* True if an OpenMP structured block scope has been closed since
185 the goto appeared. This means that the branch from the label will
186 illegally exit an OpenMP scope. */
190 /* A list of all LABEL_DECLs in the function that have names. Here so
191 we can clear out their names' definitions at the end of the
192 function, and so we can check the validity of jumps to these labels. */
194 struct named_label_entry GTY(())
196 /* The decl itself. */
199 /* The binding level to which the label is *currently* attached.
200 This is initially set to the binding level in which the label
201 is defined, but is modified as scopes are closed. */
202 struct cp_binding_level *binding_level;
203 /* The head of the names list that was current when the label was
204 defined, or the inner scope popped. These are the decls that will
205 be skipped when jumping to the label. */
207 /* A tree list of all decls from all binding levels that would be
208 crossed by a backward branch to the label. */
211 /* A list of uses of the label, before the label is defined. */
212 struct named_label_use_entry *uses;
214 /* The following bits are set after the label is defined, and are
215 updated as scopes are popped. They indicate that a backward jump
216 to the label will illegally enter a scope of the given flavor. */
222 #define named_labels cp_function_chain->x_named_labels
224 /* The number of function bodies which we are currently processing.
225 (Zero if we are at namespace scope, one inside the body of a
226 function, two inside the body of a function in a local class, etc.) */
229 /* States indicating how grokdeclarator() should handle declspecs marked
230 with __attribute__((deprecated)). An object declared as
231 __attribute__((deprecated)) suppresses warnings of uses of other
234 enum deprecated_states {
239 static enum deprecated_states deprecated_state = DEPRECATED_NORMAL;
242 /* A TREE_LIST of VAR_DECLs. The TREE_PURPOSE is a RECORD_TYPE or
243 UNION_TYPE; the TREE_VALUE is a VAR_DECL with that type. At the
244 time the VAR_DECL was declared, the type was incomplete. */
246 static GTY(()) tree incomplete_vars;
248 /* Returns the kind of template specialization we are currently
249 processing, given that it's declaration contained N_CLASS_SCOPES
250 explicit scope qualifications. */
253 current_tmpl_spec_kind (int n_class_scopes)
255 int n_template_parm_scopes = 0;
256 int seen_specialization_p = 0;
257 int innermost_specialization_p = 0;
258 struct cp_binding_level *b;
260 /* Scan through the template parameter scopes. */
261 for (b = current_binding_level;
262 b->kind == sk_template_parms;
265 /* If we see a specialization scope inside a parameter scope,
266 then something is wrong. That corresponds to a declaration
269 template <class T> template <> ...
271 which is always invalid since [temp.expl.spec] forbids the
272 specialization of a class member template if the enclosing
273 class templates are not explicitly specialized as well. */
274 if (b->explicit_spec_p)
276 if (n_template_parm_scopes == 0)
277 innermost_specialization_p = 1;
279 seen_specialization_p = 1;
281 else if (seen_specialization_p == 1)
282 return tsk_invalid_member_spec;
284 ++n_template_parm_scopes;
287 /* Handle explicit instantiations. */
288 if (processing_explicit_instantiation)
290 if (n_template_parm_scopes != 0)
291 /* We've seen a template parameter list during an explicit
292 instantiation. For example:
294 template <class T> template void f(int);
296 This is erroneous. */
297 return tsk_invalid_expl_inst;
299 return tsk_expl_inst;
302 if (n_template_parm_scopes < n_class_scopes)
303 /* We've not seen enough template headers to match all the
304 specialized classes present. For example:
306 template <class T> void R<T>::S<T>::f(int);
308 This is invalid; there needs to be one set of template
309 parameters for each class. */
310 return tsk_insufficient_parms;
311 else if (n_template_parm_scopes == n_class_scopes)
312 /* We're processing a non-template declaration (even though it may
313 be a member of a template class.) For example:
315 template <class T> void S<T>::f(int);
317 The `class T' maches the `S<T>', leaving no template headers
318 corresponding to the `f'. */
320 else if (n_template_parm_scopes > n_class_scopes + 1)
321 /* We've got too many template headers. For example:
323 template <> template <class T> void f (T);
325 There need to be more enclosing classes. */
326 return tsk_excessive_parms;
328 /* This must be a template. It's of the form:
330 template <class T> template <class U> void S<T>::f(U);
332 This is a specialization if the innermost level was a
333 specialization; otherwise it's just a definition of the
335 return innermost_specialization_p ? tsk_expl_spec : tsk_template;
338 /* Exit the current scope. */
346 /* When a label goes out of scope, check to see if that label was used
347 in a valid manner, and issue any appropriate warnings or errors. */
350 pop_label (tree label, tree old_value)
352 if (!processing_template_decl)
354 if (DECL_INITIAL (label) == NULL_TREE)
358 error ("label %q+D used but not defined", label);
359 #ifdef USE_MAPPED_LOCATION
360 location = input_location; /* FIXME want (input_filename, (line)0) */
362 location.file = input_filename;
365 /* Avoid crashing later. */
366 define_label (location, DECL_NAME (label));
369 warn_for_unused_label (label);
372 SET_IDENTIFIER_LABEL_VALUE (DECL_NAME (label), old_value);
375 /* At the end of a function, all labels declared within the function
376 go out of scope. BLOCK is the top-level block for the
380 pop_labels_1 (void **slot, void *data)
382 struct named_label_entry *ent = (struct named_label_entry *) *slot;
383 tree block = (tree) data;
385 pop_label (ent->label_decl, NULL_TREE);
387 /* Put the labels into the "variables" of the top-level block,
388 so debugger can see them. */
389 TREE_CHAIN (ent->label_decl) = BLOCK_VARS (block);
390 BLOCK_VARS (block) = ent->label_decl;
392 htab_clear_slot (named_labels, slot);
398 pop_labels (tree block)
402 htab_traverse (named_labels, pop_labels_1, block);
407 /* At the end of a block with local labels, restore the outer definition. */
410 pop_local_label (tree label, tree old_value)
412 struct named_label_entry dummy;
415 pop_label (label, old_value);
417 dummy.label_decl = label;
418 slot = htab_find_slot (named_labels, &dummy, NO_INSERT);
419 htab_clear_slot (named_labels, slot);
422 /* The following two routines are used to interface to Objective-C++.
423 The binding level is purposely treated as an opaque type. */
426 objc_get_current_scope (void)
428 return current_binding_level;
431 /* The following routine is used by the NeXT-style SJLJ exceptions;
432 variables get marked 'volatile' so as to not be clobbered by
433 _setjmp()/_longjmp() calls. All variables in the current scope,
434 as well as parent scopes up to (but not including) ENCLOSING_BLK
435 shall be thusly marked. */
438 objc_mark_locals_volatile (void *enclosing_blk)
440 struct cp_binding_level *scope;
442 for (scope = current_binding_level;
443 scope && scope != enclosing_blk;
444 scope = scope->level_chain)
448 for (decl = scope->names; decl; decl = TREE_CHAIN (decl))
449 objc_volatilize_decl (decl);
451 /* Do not climb up past the current function. */
452 if (scope->kind == sk_function_parms)
457 /* Update data for defined and undefined labels when leaving a scope. */
460 poplevel_named_label_1 (void **slot, void *data)
462 struct named_label_entry *ent = (struct named_label_entry *) *slot;
463 struct cp_binding_level *bl = (struct cp_binding_level *) data;
464 struct cp_binding_level *obl = bl->level_chain;
466 if (ent->binding_level == bl)
470 for (decl = ent->names_in_scope; decl; decl = TREE_CHAIN (decl))
471 if (decl_jump_unsafe (decl))
472 ent->bad_decls = tree_cons (NULL, decl, ent->bad_decls);
474 ent->binding_level = obl;
475 ent->names_in_scope = obl->names;
479 ent->in_try_scope = true;
482 ent->in_catch_scope = true;
485 ent->in_omp_scope = true;
493 struct named_label_use_entry *use;
495 for (use = ent->uses; use ; use = use->next)
496 if (use->binding_level == bl)
498 use->binding_level = obl;
499 use->names_in_scope = obl->names;
500 if (bl->kind == sk_omp)
501 use->in_omp_scope = true;
508 /* Exit a binding level.
509 Pop the level off, and restore the state of the identifier-decl mappings
510 that were in effect when this level was entered.
512 If KEEP == 1, this level had explicit declarations, so
513 and create a "block" (a BLOCK node) for the level
514 to record its declarations and subblocks for symbol table output.
516 If FUNCTIONBODY is nonzero, this level is the body of a function,
517 so create a block as if KEEP were set and also clear out all
520 If REVERSE is nonzero, reverse the order of decls before putting
521 them into the BLOCK. */
524 poplevel (int keep, int reverse, int functionbody)
527 /* The chain of decls was accumulated in reverse order.
528 Put it into forward order, just for cleanliness. */
530 int tmp = functionbody;
531 int real_functionbody;
535 int leaving_for_scope;
538 timevar_push (TV_NAME_LOOKUP);
543 gcc_assert (current_binding_level->kind != sk_class);
545 real_functionbody = (current_binding_level->kind == sk_cleanup
546 ? ((functionbody = 0), tmp) : functionbody);
547 subblocks = functionbody >= 0 ? current_binding_level->blocks : 0;
549 gcc_assert (!VEC_length(cp_class_binding,
550 current_binding_level->class_shadowed));
552 /* We used to use KEEP == 2 to indicate that the new block should go
553 at the beginning of the list of blocks at this binding level,
554 rather than the end. This hack is no longer used. */
555 gcc_assert (keep == 0 || keep == 1);
557 if (current_binding_level->keep)
560 /* Any uses of undefined labels, and any defined labels, now operate
561 under constraints of next binding contour. */
562 if (cfun && !functionbody && named_labels)
563 htab_traverse (named_labels, poplevel_named_label_1,
564 current_binding_level);
566 /* Get the decls in the order they were written.
567 Usually current_binding_level->names is in reverse order.
568 But parameter decls were previously put in forward order. */
571 current_binding_level->names
572 = decls = nreverse (current_binding_level->names);
574 decls = current_binding_level->names;
576 /* If there were any declarations or structure tags in that level,
577 or if this level is a function body,
578 create a BLOCK to record them for the life of this function. */
580 if (keep == 1 || functionbody)
581 block = make_node (BLOCK);
582 if (block != NULL_TREE)
584 BLOCK_VARS (block) = decls;
585 BLOCK_SUBBLOCKS (block) = subblocks;
588 /* In each subblock, record that this is its superior. */
590 for (link = subblocks; link; link = TREE_CHAIN (link))
591 BLOCK_SUPERCONTEXT (link) = block;
593 /* We still support the old for-scope rules, whereby the variables
594 in a for-init statement were in scope after the for-statement
595 ended. We only use the new rules if flag_new_for_scope is
598 = current_binding_level->kind == sk_for && flag_new_for_scope == 1;
600 /* Before we remove the declarations first check for unused variables. */
601 if (warn_unused_variable
602 && !processing_template_decl)
603 for (decl = getdecls (); decl; decl = TREE_CHAIN (decl))
604 if (TREE_CODE (decl) == VAR_DECL
605 && ! TREE_USED (decl)
606 && ! DECL_IN_SYSTEM_HEADER (decl)
607 && DECL_NAME (decl) && ! DECL_ARTIFICIAL (decl))
608 warning (OPT_Wunused_variable, "unused variable %q+D", decl);
610 /* Remove declarations for all the DECLs in this level. */
611 for (link = decls; link; link = TREE_CHAIN (link))
613 if (leaving_for_scope && TREE_CODE (link) == VAR_DECL
616 tree name = DECL_NAME (link);
620 ob = outer_binding (name,
621 IDENTIFIER_BINDING (name),
624 ns_binding = IDENTIFIER_NAMESPACE_VALUE (name);
626 ns_binding = NULL_TREE;
628 if (ob && ob->scope == current_binding_level->level_chain)
629 /* We have something like:
634 and we are leaving the `for' scope. There's no reason to
635 keep the binding of the inner `i' in this case. */
636 pop_binding (name, link);
637 else if ((ob && (TREE_CODE (ob->value) == TYPE_DECL))
638 || (ns_binding && TREE_CODE (ns_binding) == TYPE_DECL))
639 /* Here, we have something like:
647 We must pop the for-scope binding so we know what's a
648 type and what isn't. */
649 pop_binding (name, link);
652 /* Mark this VAR_DECL as dead so that we can tell we left it
653 there only for backward compatibility. */
654 DECL_DEAD_FOR_LOCAL (link) = 1;
656 /* Keep track of what should have happened when we
657 popped the binding. */
660 SET_DECL_SHADOWED_FOR_VAR (link, ob->value);
661 DECL_HAS_SHADOWED_FOR_VAR_P (link) = 1;
664 /* Add it to the list of dead variables in the next
665 outermost binding to that we can remove these when we
666 leave that binding. */
667 current_binding_level->level_chain->dead_vars_from_for
668 = tree_cons (NULL_TREE, link,
669 current_binding_level->level_chain->
672 /* Although we don't pop the cxx_binding, we do clear
673 its SCOPE since the scope is going away now. */
674 IDENTIFIER_BINDING (name)->scope
675 = current_binding_level->level_chain;
682 /* Remove the binding. */
685 if (TREE_CODE (decl) == TREE_LIST)
686 decl = TREE_VALUE (decl);
689 if (TREE_CODE (name) == OVERLOAD)
690 name = OVL_FUNCTION (name);
692 gcc_assert (DECL_P (name));
693 pop_binding (DECL_NAME (name), decl);
697 /* Remove declarations for any `for' variables from inner scopes
698 that we kept around. */
699 for (link = current_binding_level->dead_vars_from_for;
700 link; link = TREE_CHAIN (link))
701 pop_binding (DECL_NAME (TREE_VALUE (link)), TREE_VALUE (link));
703 /* Restore the IDENTIFIER_TYPE_VALUEs. */
704 for (link = current_binding_level->type_shadowed;
705 link; link = TREE_CHAIN (link))
706 SET_IDENTIFIER_TYPE_VALUE (TREE_PURPOSE (link), TREE_VALUE (link));
708 /* Restore the IDENTIFIER_LABEL_VALUEs for local labels. */
709 for (link = current_binding_level->shadowed_labels;
711 link = TREE_CHAIN (link))
712 pop_local_label (TREE_VALUE (link), TREE_PURPOSE (link));
714 /* There may be OVERLOADs (wrapped in TREE_LISTs) on the BLOCK_VARs
715 list if a `using' declaration put them there. The debugging
716 back-ends won't understand OVERLOAD, so we remove them here.
717 Because the BLOCK_VARS are (temporarily) shared with
718 CURRENT_BINDING_LEVEL->NAMES we must do this fixup after we have
719 popped all the bindings. */
724 for (d = &BLOCK_VARS (block); *d; )
726 if (TREE_CODE (*d) == TREE_LIST)
727 *d = TREE_CHAIN (*d);
729 d = &TREE_CHAIN (*d);
733 /* If the level being exited is the top level of a function,
734 check over all the labels. */
737 /* Since this is the top level block of a function, the vars are
738 the function's parameters. Don't leave them in the BLOCK
739 because they are found in the FUNCTION_DECL instead. */
740 BLOCK_VARS (block) = 0;
744 kind = current_binding_level->kind;
745 if (kind == sk_cleanup)
749 /* If this is a temporary binding created for a cleanup, then we'll
750 have pushed a statement list level. Pop that, create a new
751 BIND_EXPR for the block, and insert it into the stream. */
752 stmt = pop_stmt_list (current_binding_level->statement_list);
753 stmt = c_build_bind_expr (block, stmt);
760 /* The current function is being defined, so its DECL_INITIAL
761 should be error_mark_node. */
762 gcc_assert (DECL_INITIAL (current_function_decl) == error_mark_node);
763 DECL_INITIAL (current_function_decl) = block;
766 current_binding_level->blocks
767 = chainon (current_binding_level->blocks, block);
769 /* If we did not make a block for the level just exited,
770 any blocks made for inner levels
771 (since they cannot be recorded as subblocks in that level)
772 must be carried forward so they will later become subblocks
773 of something else. */
775 current_binding_level->blocks
776 = chainon (current_binding_level->blocks, subblocks);
778 /* Each and every BLOCK node created here in `poplevel' is important
779 (e.g. for proper debugging information) so if we created one
780 earlier, mark it as "used". */
782 TREE_USED (block) = 1;
784 /* All temporary bindings created for cleanups are popped silently. */
785 if (kind == sk_cleanup)
788 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, block);
791 /* Insert BLOCK at the end of the list of subblocks of the
792 current binding level. This is used when a BIND_EXPR is expanded,
793 to handle the BLOCK node inside the BIND_EXPR. */
796 insert_block (tree block)
798 TREE_USED (block) = 1;
799 current_binding_level->blocks
800 = chainon (current_binding_level->blocks, block);
803 /* Walk all the namespaces contained NAMESPACE, including NAMESPACE
804 itself, calling F for each. The DATA is passed to F as well. */
807 walk_namespaces_r (tree namespace, walk_namespaces_fn f, void* data)
810 tree current = NAMESPACE_LEVEL (namespace)->namespaces;
812 result |= (*f) (namespace, data);
814 for (; current; current = TREE_CHAIN (current))
815 result |= walk_namespaces_r (current, f, data);
820 /* Walk all the namespaces, calling F for each. The DATA is passed to
824 walk_namespaces (walk_namespaces_fn f, void* data)
826 return walk_namespaces_r (global_namespace, f, data);
829 /* Call wrapup_globals_declarations for the globals in NAMESPACE. If
830 DATA is non-NULL, this is the last time we will call
831 wrapup_global_declarations for this NAMESPACE. */
834 wrapup_globals_for_namespace (tree namespace, void* data)
836 struct cp_binding_level *level = NAMESPACE_LEVEL (namespace);
837 VEC(tree,gc) *statics = level->static_decls;
838 tree *vec = VEC_address (tree, statics);
839 int len = VEC_length (tree, statics);
840 int last_time = (data != 0);
844 check_global_declarations (vec, len);
845 emit_debug_global_declarations (vec, len);
849 /* Write out any globals that need to be output. */
850 return wrapup_global_declarations (vec, len);
854 /* In C++, you don't have to write `struct S' to refer to `S'; you
855 can just use `S'. We accomplish this by creating a TYPE_DECL as
856 if the user had written `typedef struct S S'. Create and return
857 the TYPE_DECL for TYPE. */
860 create_implicit_typedef (tree name, tree type)
864 decl = build_decl (TYPE_DECL, name, type);
865 DECL_ARTIFICIAL (decl) = 1;
866 /* There are other implicit type declarations, like the one *within*
867 a class that allows you to write `S::S'. We must distinguish
869 SET_DECL_IMPLICIT_TYPEDEF_P (decl);
870 TYPE_NAME (type) = decl;
875 /* Remember a local name for name-mangling purposes. */
878 push_local_name (tree decl)
883 timevar_push (TV_NAME_LOOKUP);
885 name = DECL_NAME (decl);
887 nelts = VEC_length (tree, local_names);
888 for (i = 0; i < nelts; i++)
890 t = VEC_index (tree, local_names, i);
891 if (DECL_NAME (t) == name)
893 if (!DECL_LANG_SPECIFIC (decl))
894 retrofit_lang_decl (decl);
895 DECL_LANG_SPECIFIC (decl)->decl_flags.u2sel = 1;
896 if (DECL_LANG_SPECIFIC (t))
897 DECL_DISCRIMINATOR (decl) = DECL_DISCRIMINATOR (t) + 1;
899 DECL_DISCRIMINATOR (decl) = 1;
901 VEC_replace (tree, local_names, i, decl);
902 timevar_pop (TV_NAME_LOOKUP);
907 VEC_safe_push (tree, gc, local_names, decl);
908 timevar_pop (TV_NAME_LOOKUP);
911 /* Subroutine of duplicate_decls: return truthvalue of whether
912 or not types of these decls match.
914 For C++, we must compare the parameter list so that `int' can match
915 `int&' in a parameter position, but `int&' is not confused with
919 decls_match (tree newdecl, tree olddecl)
923 if (newdecl == olddecl)
926 if (TREE_CODE (newdecl) != TREE_CODE (olddecl))
927 /* If the two DECLs are not even the same kind of thing, we're not
928 interested in their types. */
931 if (TREE_CODE (newdecl) == FUNCTION_DECL)
933 tree f1 = TREE_TYPE (newdecl);
934 tree f2 = TREE_TYPE (olddecl);
935 tree p1 = TYPE_ARG_TYPES (f1);
936 tree p2 = TYPE_ARG_TYPES (f2);
938 if (CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl)
939 && ! (DECL_EXTERN_C_P (newdecl)
940 && DECL_EXTERN_C_P (olddecl)))
943 if (TREE_CODE (f1) != TREE_CODE (f2))
946 if (same_type_p (TREE_TYPE (f1), TREE_TYPE (f2)))
948 if (p2 == NULL_TREE && DECL_EXTERN_C_P (olddecl)
949 && (DECL_BUILT_IN (olddecl)
950 #ifndef NO_IMPLICIT_EXTERN_C
951 || (DECL_IN_SYSTEM_HEADER (newdecl) && !DECL_CLASS_SCOPE_P (newdecl))
952 || (DECL_IN_SYSTEM_HEADER (olddecl) && !DECL_CLASS_SCOPE_P (olddecl))
956 types_match = self_promoting_args_p (p1);
957 if (p1 == void_list_node)
958 TREE_TYPE (newdecl) = TREE_TYPE (olddecl);
960 #ifndef NO_IMPLICIT_EXTERN_C
961 else if (p1 == NULL_TREE
962 && (DECL_EXTERN_C_P (olddecl)
963 && DECL_IN_SYSTEM_HEADER (olddecl)
964 && !DECL_CLASS_SCOPE_P (olddecl))
965 && (DECL_EXTERN_C_P (newdecl)
966 && DECL_IN_SYSTEM_HEADER (newdecl)
967 && !DECL_CLASS_SCOPE_P (newdecl)))
969 types_match = self_promoting_args_p (p2);
970 TREE_TYPE (newdecl) = TREE_TYPE (olddecl);
974 types_match = compparms (p1, p2);
979 else if (TREE_CODE (newdecl) == TEMPLATE_DECL)
981 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl))
982 != TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)))
985 if (!comp_template_parms (DECL_TEMPLATE_PARMS (newdecl),
986 DECL_TEMPLATE_PARMS (olddecl)))
989 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
990 types_match = same_type_p (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl)),
991 TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl)));
993 types_match = decls_match (DECL_TEMPLATE_RESULT (olddecl),
994 DECL_TEMPLATE_RESULT (newdecl));
998 /* Need to check scope for variable declaration (VAR_DECL).
999 For typedef (TYPE_DECL), scope is ignored. */
1000 if (TREE_CODE (newdecl) == VAR_DECL
1001 && CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl)
1003 Two declarations for an object with C language linkage
1004 with the same name (ignoring the namespace that qualify
1005 it) that appear in different namespace scopes refer to
1007 && !(DECL_EXTERN_C_P (olddecl) && DECL_EXTERN_C_P (newdecl)))
1010 if (TREE_TYPE (newdecl) == error_mark_node)
1011 types_match = TREE_TYPE (olddecl) == error_mark_node;
1012 else if (TREE_TYPE (olddecl) == NULL_TREE)
1013 types_match = TREE_TYPE (newdecl) == NULL_TREE;
1014 else if (TREE_TYPE (newdecl) == NULL_TREE)
1017 types_match = comptypes (TREE_TYPE (newdecl),
1018 TREE_TYPE (olddecl),
1019 COMPARE_REDECLARATION);
1025 /* If NEWDECL is `static' and an `extern' was seen previously,
1026 warn about it. OLDDECL is the previous declaration.
1028 Note that this does not apply to the C++ case of declaring
1029 a variable `extern const' and then later `const'.
1031 Don't complain about built-in functions, since they are beyond
1032 the user's control. */
1035 warn_extern_redeclared_static (tree newdecl, tree olddecl)
1039 if (TREE_CODE (newdecl) == TYPE_DECL
1040 || TREE_CODE (newdecl) == TEMPLATE_DECL
1041 || TREE_CODE (newdecl) == CONST_DECL
1042 || TREE_CODE (newdecl) == NAMESPACE_DECL)
1045 /* Don't get confused by static member functions; that's a different
1047 if (TREE_CODE (newdecl) == FUNCTION_DECL
1048 && DECL_STATIC_FUNCTION_P (newdecl))
1051 /* If the old declaration was `static', or the new one isn't, then
1052 then everything is OK. */
1053 if (DECL_THIS_STATIC (olddecl) || !DECL_THIS_STATIC (newdecl))
1056 /* It's OK to declare a builtin function as `static'. */
1057 if (TREE_CODE (olddecl) == FUNCTION_DECL
1058 && DECL_ARTIFICIAL (olddecl))
1061 name = DECL_ASSEMBLER_NAME (newdecl);
1062 pedwarn ("%qD was declared %<extern%> and later %<static%>", newdecl);
1063 pedwarn ("previous declaration of %q+D", olddecl);
1066 /* NEW_DECL is a redeclaration of OLD_DECL; both are functions or
1067 function templates. If their exception specifications do not
1068 match, issue an a diagnostic. */
1071 check_redeclaration_exception_specification (tree new_decl,
1076 tree new_exceptions;
1077 tree old_exceptions;
1079 new_type = TREE_TYPE (new_decl);
1080 new_exceptions = TYPE_RAISES_EXCEPTIONS (new_type);
1081 old_type = TREE_TYPE (old_decl);
1082 old_exceptions = TYPE_RAISES_EXCEPTIONS (old_type);
1086 If any declaration of a function has an exception-specification,
1087 all declarations, including the definition and an explicit
1088 specialization, of that function shall have an
1089 exception-specification with the same set of type-ids. */
1090 if ((pedantic || ! DECL_IN_SYSTEM_HEADER (old_decl))
1091 && ! DECL_IS_BUILTIN (old_decl)
1093 && !comp_except_specs (new_exceptions, old_exceptions,
1096 error ("declaration of %qF throws different exceptions", new_decl);
1097 error ("from previous declaration %q+F", old_decl);
1101 /* If NEWDECL is a redeclaration of OLDDECL, merge the declarations.
1102 If the redeclaration is invalid, a diagnostic is issued, and the
1103 error_mark_node is returned. Otherwise, OLDDECL is returned.
1105 If NEWDECL is not a redeclaration of OLDDECL, NULL_TREE is
1108 NEWDECL_IS_FRIEND is true if NEWDECL was declared as a friend. */
1111 duplicate_decls (tree newdecl, tree olddecl, bool newdecl_is_friend)
1113 unsigned olddecl_uid = DECL_UID (olddecl);
1114 int olddecl_friend = 0, types_match = 0, hidden_friend = 0;
1115 int new_defines_function = 0;
1118 if (newdecl == olddecl)
1121 types_match = decls_match (newdecl, olddecl);
1123 /* If either the type of the new decl or the type of the old decl is an
1124 error_mark_node, then that implies that we have already issued an
1125 error (earlier) for some bogus type specification, and in that case,
1126 it is rather pointless to harass the user with yet more error message
1127 about the same declaration, so just pretend the types match here. */
1128 if (TREE_TYPE (newdecl) == error_mark_node
1129 || TREE_TYPE (olddecl) == error_mark_node)
1130 return error_mark_node;
1132 if (DECL_P (olddecl)
1133 && TREE_CODE (newdecl) == FUNCTION_DECL
1134 && TREE_CODE (olddecl) == FUNCTION_DECL
1135 && (DECL_UNINLINABLE (newdecl) || DECL_UNINLINABLE (olddecl)))
1137 if (DECL_DECLARED_INLINE_P (newdecl)
1138 && DECL_UNINLINABLE (newdecl)
1139 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl)))
1140 /* Already warned elsewhere. */;
1141 else if (DECL_DECLARED_INLINE_P (olddecl)
1142 && DECL_UNINLINABLE (olddecl)
1143 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl)))
1144 /* Already warned. */;
1145 else if (DECL_DECLARED_INLINE_P (newdecl)
1146 && DECL_UNINLINABLE (olddecl)
1147 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl)))
1149 warning (OPT_Wattributes, "function %q+D redeclared as inline",
1151 warning (OPT_Wattributes, "previous declaration of %q+D "
1152 "with attribute noinline", olddecl);
1154 else if (DECL_DECLARED_INLINE_P (olddecl)
1155 && DECL_UNINLINABLE (newdecl)
1156 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl)))
1158 warning (OPT_Wattributes, "function %q+D redeclared with "
1159 "attribute noinline", newdecl);
1160 warning (OPT_Wattributes, "previous declaration of %q+D was inline",
1165 /* Check for redeclaration and other discrepancies. */
1166 if (TREE_CODE (olddecl) == FUNCTION_DECL
1167 && DECL_ARTIFICIAL (olddecl))
1169 gcc_assert (!DECL_HIDDEN_FRIEND_P (olddecl));
1170 if (TREE_CODE (newdecl) != FUNCTION_DECL)
1172 /* Avoid warnings redeclaring built-ins which have not been
1173 explicitly declared. */
1174 if (DECL_ANTICIPATED (olddecl))
1177 /* If you declare a built-in or predefined function name as static,
1178 the old definition is overridden, but optionally warn this was a
1179 bad choice of name. */
1180 if (! TREE_PUBLIC (newdecl))
1182 warning (OPT_Wshadow, "shadowing %s function %q#D",
1183 DECL_BUILT_IN (olddecl) ? "built-in" : "library",
1185 /* Discard the old built-in function. */
1188 /* If the built-in is not ansi, then programs can override
1189 it even globally without an error. */
1190 else if (! DECL_BUILT_IN (olddecl))
1191 warning (0, "library function %q#D redeclared as non-function %q#D",
1195 error ("declaration of %q#D", newdecl);
1196 error ("conflicts with built-in declaration %q#D",
1201 else if (!types_match)
1203 /* Avoid warnings redeclaring built-ins which have not been
1204 explicitly declared. */
1205 if (DECL_ANTICIPATED (olddecl))
1207 /* Deal with fileptr_type_node. FILE type is not known
1208 at the time we create the builtins. */
1211 for (t1 = TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1212 t2 = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1214 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2))
1217 else if (TREE_VALUE (t2) == fileptr_type_node)
1219 tree t = TREE_VALUE (t1);
1221 if (TREE_CODE (t) == POINTER_TYPE
1222 && TYPE_NAME (TREE_TYPE (t))
1223 && DECL_NAME (TYPE_NAME (TREE_TYPE (t)))
1224 == get_identifier ("FILE")
1225 && compparms (TREE_CHAIN (t1), TREE_CHAIN (t2)))
1227 tree oldargs = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1229 TYPE_ARG_TYPES (TREE_TYPE (olddecl))
1230 = TYPE_ARG_TYPES (TREE_TYPE (newdecl));
1231 types_match = decls_match (newdecl, olddecl);
1233 return duplicate_decls (newdecl, olddecl,
1235 TYPE_ARG_TYPES (TREE_TYPE (olddecl)) = oldargs;
1238 else if (! same_type_p (TREE_VALUE (t1), TREE_VALUE (t2)))
1241 else if ((DECL_EXTERN_C_P (newdecl)
1242 && DECL_EXTERN_C_P (olddecl))
1243 || compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1244 TYPE_ARG_TYPES (TREE_TYPE (olddecl))))
1246 /* A near match; override the builtin. */
1248 if (TREE_PUBLIC (newdecl))
1250 warning (0, "new declaration %q#D", newdecl);
1251 warning (0, "ambiguates built-in declaration %q#D",
1255 warning (OPT_Wshadow, "shadowing %s function %q#D",
1256 DECL_BUILT_IN (olddecl) ? "built-in" : "library",
1260 /* Discard the old built-in function. */
1263 /* Replace the old RTL to avoid problems with inlining. */
1264 COPY_DECL_RTL (newdecl, olddecl);
1266 /* Even if the types match, prefer the new declarations type for
1267 built-ins which have not been explicitly declared, for
1268 exception lists, etc... */
1269 else if (DECL_ANTICIPATED (olddecl))
1271 tree type = TREE_TYPE (newdecl);
1272 tree attribs = (*targetm.merge_type_attributes)
1273 (TREE_TYPE (olddecl), type);
1275 type = cp_build_type_attribute_variant (type, attribs);
1276 TREE_TYPE (newdecl) = TREE_TYPE (olddecl) = type;
1279 /* Whether or not the builtin can throw exceptions has no
1280 bearing on this declarator. */
1281 TREE_NOTHROW (olddecl) = 0;
1283 if (DECL_THIS_STATIC (newdecl) && !DECL_THIS_STATIC (olddecl))
1285 /* If a builtin function is redeclared as `static', merge
1286 the declarations, but make the original one static. */
1287 DECL_THIS_STATIC (olddecl) = 1;
1288 TREE_PUBLIC (olddecl) = 0;
1290 /* Make the old declaration consistent with the new one so
1291 that all remnants of the builtin-ness of this function
1292 will be banished. */
1293 SET_DECL_LANGUAGE (olddecl, DECL_LANGUAGE (newdecl));
1294 COPY_DECL_RTL (newdecl, olddecl);
1297 else if (TREE_CODE (olddecl) != TREE_CODE (newdecl))
1299 if ((TREE_CODE (olddecl) == TYPE_DECL && DECL_ARTIFICIAL (olddecl)
1300 && TREE_CODE (newdecl) != TYPE_DECL
1301 && ! (TREE_CODE (newdecl) == TEMPLATE_DECL
1302 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL))
1303 || (TREE_CODE (newdecl) == TYPE_DECL && DECL_ARTIFICIAL (newdecl)
1304 && TREE_CODE (olddecl) != TYPE_DECL
1305 && ! (TREE_CODE (olddecl) == TEMPLATE_DECL
1306 && (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl))
1309 /* We do nothing special here, because C++ does such nasty
1310 things with TYPE_DECLs. Instead, just let the TYPE_DECL
1311 get shadowed, and know that if we need to find a TYPE_DECL
1312 for a given name, we can look in the IDENTIFIER_TYPE_VALUE
1313 slot of the identifier. */
1317 if ((TREE_CODE (newdecl) == FUNCTION_DECL
1318 && DECL_FUNCTION_TEMPLATE_P (olddecl))
1319 || (TREE_CODE (olddecl) == FUNCTION_DECL
1320 && DECL_FUNCTION_TEMPLATE_P (newdecl)))
1323 error ("%q#D redeclared as different kind of symbol", newdecl);
1324 if (TREE_CODE (olddecl) == TREE_LIST)
1325 olddecl = TREE_VALUE (olddecl);
1326 error ("previous declaration of %q+#D", olddecl);
1328 return error_mark_node;
1330 else if (!types_match)
1332 if (CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl))
1333 /* These are certainly not duplicate declarations; they're
1334 from different scopes. */
1337 if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1339 /* The name of a class template may not be declared to refer to
1340 any other template, class, function, object, namespace, value,
1341 or type in the same scope. */
1342 if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) == TYPE_DECL
1343 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
1345 error ("declaration of template %q#D", newdecl);
1346 error ("conflicts with previous declaration %q+#D", olddecl);
1348 else if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) == FUNCTION_DECL
1349 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == FUNCTION_DECL
1350 && compparms (TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl))),
1351 TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl))))
1352 && comp_template_parms (DECL_TEMPLATE_PARMS (newdecl),
1353 DECL_TEMPLATE_PARMS (olddecl))
1354 /* Template functions can be disambiguated by
1356 && same_type_p (TREE_TYPE (TREE_TYPE (newdecl)),
1357 TREE_TYPE (TREE_TYPE (olddecl))))
1359 error ("new declaration %q#D", newdecl);
1360 error ("ambiguates old declaration %q+#D", olddecl);
1364 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1366 if (DECL_EXTERN_C_P (newdecl) && DECL_EXTERN_C_P (olddecl))
1368 error ("declaration of C function %q#D conflicts with",
1370 error ("previous declaration %q+#D here", olddecl);
1372 else if (compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1373 TYPE_ARG_TYPES (TREE_TYPE (olddecl))))
1375 error ("new declaration %q#D", newdecl);
1376 error ("ambiguates old declaration %q+#D", olddecl);
1377 return error_mark_node;
1384 error ("conflicting declaration %q#D", newdecl);
1385 error ("%q+D has a previous declaration as %q#D", olddecl, olddecl);
1386 return error_mark_node;
1389 else if (TREE_CODE (newdecl) == FUNCTION_DECL
1390 && ((DECL_TEMPLATE_SPECIALIZATION (olddecl)
1391 && (!DECL_TEMPLATE_INFO (newdecl)
1392 || (DECL_TI_TEMPLATE (newdecl)
1393 != DECL_TI_TEMPLATE (olddecl))))
1394 || (DECL_TEMPLATE_SPECIALIZATION (newdecl)
1395 && (!DECL_TEMPLATE_INFO (olddecl)
1396 || (DECL_TI_TEMPLATE (olddecl)
1397 != DECL_TI_TEMPLATE (newdecl))))))
1398 /* It's OK to have a template specialization and a non-template
1399 with the same type, or to have specializations of two
1400 different templates with the same type. Note that if one is a
1401 specialization, and the other is an instantiation of the same
1402 template, that we do not exit at this point. That situation
1403 can occur if we instantiate a template class, and then
1404 specialize one of its methods. This situation is valid, but
1405 the declarations must be merged in the usual way. */
1407 else if (TREE_CODE (newdecl) == FUNCTION_DECL
1408 && ((DECL_TEMPLATE_INSTANTIATION (olddecl)
1409 && !DECL_USE_TEMPLATE (newdecl))
1410 || (DECL_TEMPLATE_INSTANTIATION (newdecl)
1411 && !DECL_USE_TEMPLATE (olddecl))))
1412 /* One of the declarations is a template instantiation, and the
1413 other is not a template at all. That's OK. */
1415 else if (TREE_CODE (newdecl) == NAMESPACE_DECL)
1417 /* In [namespace.alias] we have:
1419 In a declarative region, a namespace-alias-definition can be
1420 used to redefine a namespace-alias declared in that declarative
1421 region to refer only to the namespace to which it already
1424 Therefore, if we encounter a second alias directive for the same
1425 alias, we can just ignore the second directive. */
1426 if (DECL_NAMESPACE_ALIAS (newdecl)
1427 && (DECL_NAMESPACE_ALIAS (newdecl)
1428 == DECL_NAMESPACE_ALIAS (olddecl)))
1430 /* [namespace.alias]
1432 A namespace-name or namespace-alias shall not be declared as
1433 the name of any other entity in the same declarative region.
1434 A namespace-name defined at global scope shall not be
1435 declared as the name of any other entity in any global scope
1437 error ("declaration of namespace %qD conflicts with", newdecl);
1438 error ("previous declaration of namespace %q+D here", olddecl);
1439 return error_mark_node;
1443 const char *errmsg = redeclaration_error_message (newdecl, olddecl);
1446 error (errmsg, newdecl);
1447 if (DECL_NAME (olddecl) != NULL_TREE)
1448 error ((DECL_INITIAL (olddecl) && namespace_bindings_p ())
1449 ? "%q+#D previously defined here"
1450 : "%q+#D previously declared here", olddecl);
1451 return error_mark_node;
1453 else if (TREE_CODE (olddecl) == FUNCTION_DECL
1454 && DECL_INITIAL (olddecl) != NULL_TREE
1455 && TYPE_ARG_TYPES (TREE_TYPE (olddecl)) == NULL_TREE
1456 && TYPE_ARG_TYPES (TREE_TYPE (newdecl)) != NULL_TREE)
1458 /* Prototype decl follows defn w/o prototype. */
1459 warning (0, "prototype for %q+#D", newdecl);
1460 warning (0, "%Jfollows non-prototype definition here", olddecl);
1462 else if ((TREE_CODE (olddecl) == FUNCTION_DECL
1463 || TREE_CODE (olddecl) == VAR_DECL)
1464 && DECL_LANGUAGE (newdecl) != DECL_LANGUAGE (olddecl))
1467 If two declarations of the same function or object
1468 specify different linkage-specifications ..., the program
1469 is ill-formed.... Except for functions with C++ linkage,
1470 a function declaration without a linkage specification
1471 shall not precede the first linkage specification for
1472 that function. A function can be declared without a
1473 linkage specification after an explicit linkage
1474 specification has been seen; the linkage explicitly
1475 specified in the earlier declaration is not affected by
1476 such a function declaration.
1478 DR 563 raises the question why the restrictions on
1479 functions should not also apply to objects. Older
1480 versions of G++ silently ignore the linkage-specification
1488 which is clearly wrong. Therefore, we now treat objects
1490 if (current_lang_depth () == 0)
1492 /* There is no explicit linkage-specification, so we use
1493 the linkage from the previous declaration. */
1494 if (!DECL_LANG_SPECIFIC (newdecl))
1495 retrofit_lang_decl (newdecl);
1496 SET_DECL_LANGUAGE (newdecl, DECL_LANGUAGE (olddecl));
1500 error ("previous declaration of %q+#D with %qL linkage",
1501 olddecl, DECL_LANGUAGE (olddecl));
1502 error ("conflicts with new declaration with %qL linkage",
1503 DECL_LANGUAGE (newdecl));
1507 if (DECL_LANG_SPECIFIC (olddecl) && DECL_USE_TEMPLATE (olddecl))
1509 else if (TREE_CODE (olddecl) == FUNCTION_DECL)
1511 tree t1 = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1512 tree t2 = TYPE_ARG_TYPES (TREE_TYPE (newdecl));
1515 if (TREE_CODE (TREE_TYPE (newdecl)) == METHOD_TYPE)
1516 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2);
1518 for (; t1 && t1 != void_list_node;
1519 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2), i++)
1520 if (TREE_PURPOSE (t1) && TREE_PURPOSE (t2))
1522 if (1 == simple_cst_equal (TREE_PURPOSE (t1),
1525 pedwarn ("default argument given for parameter %d of %q#D",
1527 pedwarn ("after previous specification in %q+#D", olddecl);
1531 error ("default argument given for parameter %d of %q#D",
1533 error ("after previous specification in %q+#D",
1538 if (DECL_DECLARED_INLINE_P (newdecl)
1539 && ! DECL_DECLARED_INLINE_P (olddecl)
1540 && TREE_ADDRESSABLE (olddecl) && warn_inline)
1542 warning (0, "%q#D was used before it was declared inline", newdecl);
1543 warning (0, "%Jprevious non-inline declaration here", olddecl);
1548 /* Do not merge an implicit typedef with an explicit one. In:
1552 typedef class A A __attribute__ ((foo));
1554 the attribute should apply only to the typedef. */
1555 if (TREE_CODE (olddecl) == TYPE_DECL
1556 && (DECL_IMPLICIT_TYPEDEF_P (olddecl)
1557 || DECL_IMPLICIT_TYPEDEF_P (newdecl)))
1560 /* If new decl is `static' and an `extern' was seen previously,
1562 warn_extern_redeclared_static (newdecl, olddecl);
1564 /* We have committed to returning 1 at this point. */
1565 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1567 /* Now that functions must hold information normally held
1568 by field decls, there is extra work to do so that
1569 declaration information does not get destroyed during
1571 if (DECL_VINDEX (olddecl))
1572 DECL_VINDEX (newdecl) = DECL_VINDEX (olddecl);
1573 if (DECL_CONTEXT (olddecl))
1574 DECL_CONTEXT (newdecl) = DECL_CONTEXT (olddecl);
1575 DECL_STATIC_CONSTRUCTOR (newdecl) |= DECL_STATIC_CONSTRUCTOR (olddecl);
1576 DECL_STATIC_DESTRUCTOR (newdecl) |= DECL_STATIC_DESTRUCTOR (olddecl);
1577 DECL_PURE_VIRTUAL_P (newdecl) |= DECL_PURE_VIRTUAL_P (olddecl);
1578 DECL_VIRTUAL_P (newdecl) |= DECL_VIRTUAL_P (olddecl);
1579 DECL_INVALID_OVERRIDER_P (newdecl) |= DECL_INVALID_OVERRIDER_P (olddecl);
1580 DECL_THIS_STATIC (newdecl) |= DECL_THIS_STATIC (olddecl);
1581 if (DECL_OVERLOADED_OPERATOR_P (olddecl) != ERROR_MARK)
1582 SET_OVERLOADED_OPERATOR_CODE
1583 (newdecl, DECL_OVERLOADED_OPERATOR_P (olddecl));
1584 new_defines_function = DECL_INITIAL (newdecl) != NULL_TREE;
1586 /* Optionally warn about more than one declaration for the same
1587 name, but don't warn about a function declaration followed by a
1589 if (warn_redundant_decls && ! DECL_ARTIFICIAL (olddecl)
1590 && !(new_defines_function && DECL_INITIAL (olddecl) == NULL_TREE)
1591 /* Don't warn about extern decl followed by definition. */
1592 && !(DECL_EXTERNAL (olddecl) && ! DECL_EXTERNAL (newdecl))
1593 /* Don't warn about friends, let add_friend take care of it. */
1594 && ! (newdecl_is_friend || DECL_FRIEND_P (olddecl)))
1596 warning (OPT_Wredundant_decls, "redundant redeclaration of %qD in same scope", newdecl);
1597 warning (OPT_Wredundant_decls, "previous declaration of %q+D", olddecl);
1601 /* Deal with C++: must preserve virtual function table size. */
1602 if (TREE_CODE (olddecl) == TYPE_DECL)
1604 tree newtype = TREE_TYPE (newdecl);
1605 tree oldtype = TREE_TYPE (olddecl);
1607 if (newtype != error_mark_node && oldtype != error_mark_node
1608 && TYPE_LANG_SPECIFIC (newtype) && TYPE_LANG_SPECIFIC (oldtype))
1609 CLASSTYPE_FRIEND_CLASSES (newtype)
1610 = CLASSTYPE_FRIEND_CLASSES (oldtype);
1612 DECL_ORIGINAL_TYPE (newdecl) = DECL_ORIGINAL_TYPE (olddecl);
1615 /* Copy all the DECL_... slots specified in the new decl
1616 except for any that we copy here from the old type. */
1617 DECL_ATTRIBUTES (newdecl)
1618 = (*targetm.merge_decl_attributes) (olddecl, newdecl);
1620 if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1624 old_result = DECL_TEMPLATE_RESULT (olddecl);
1625 new_result = DECL_TEMPLATE_RESULT (newdecl);
1626 TREE_TYPE (olddecl) = TREE_TYPE (old_result);
1627 DECL_TEMPLATE_SPECIALIZATIONS (olddecl)
1628 = chainon (DECL_TEMPLATE_SPECIALIZATIONS (olddecl),
1629 DECL_TEMPLATE_SPECIALIZATIONS (newdecl));
1631 if (DECL_FUNCTION_TEMPLATE_P (newdecl))
1633 DECL_INLINE (old_result)
1634 |= DECL_INLINE (new_result);
1635 DECL_DECLARED_INLINE_P (old_result)
1636 |= DECL_DECLARED_INLINE_P (new_result);
1637 check_redeclaration_exception_specification (newdecl, olddecl);
1640 /* If the new declaration is a definition, update the file and
1641 line information on the declaration, and also make
1642 the old declaration the same definition. */
1643 if (DECL_INITIAL (old_result) == NULL_TREE
1644 && DECL_INITIAL (new_result) != NULL_TREE)
1646 DECL_SOURCE_LOCATION (olddecl)
1647 = DECL_SOURCE_LOCATION (old_result)
1648 = DECL_SOURCE_LOCATION (newdecl);
1649 DECL_INITIAL (old_result) = DECL_INITIAL (new_result);
1650 if (DECL_FUNCTION_TEMPLATE_P (newdecl))
1651 DECL_ARGUMENTS (old_result)
1652 = DECL_ARGUMENTS (new_result);
1660 /* Automatically handles default parameters. */
1661 tree oldtype = TREE_TYPE (olddecl);
1664 /* Merge the data types specified in the two decls. */
1665 newtype = merge_types (TREE_TYPE (newdecl), TREE_TYPE (olddecl));
1667 /* If merge_types produces a non-typedef type, just use the old type. */
1668 if (TREE_CODE (newdecl) == TYPE_DECL
1669 && newtype == DECL_ORIGINAL_TYPE (newdecl))
1672 if (TREE_CODE (newdecl) == VAR_DECL)
1674 DECL_THIS_EXTERN (newdecl) |= DECL_THIS_EXTERN (olddecl);
1675 DECL_INITIALIZED_P (newdecl) |= DECL_INITIALIZED_P (olddecl);
1676 DECL_NONTRIVIALLY_INITIALIZED_P (newdecl)
1677 |= DECL_NONTRIVIALLY_INITIALIZED_P (olddecl);
1678 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (newdecl)
1679 |= DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (olddecl);
1681 /* Merge the threadprivate attribute from OLDDECL into NEWDECL. */
1682 if (DECL_LANG_SPECIFIC (olddecl)
1683 && CP_DECL_THREADPRIVATE_P (olddecl))
1685 /* Allocate a LANG_SPECIFIC structure for NEWDECL, if needed. */
1686 if (!DECL_LANG_SPECIFIC (newdecl))
1687 retrofit_lang_decl (newdecl);
1689 DECL_TLS_MODEL (newdecl) = DECL_TLS_MODEL (olddecl);
1690 CP_DECL_THREADPRIVATE_P (newdecl) = 1;
1694 /* Do this after calling `merge_types' so that default
1695 parameters don't confuse us. */
1696 else if (TREE_CODE (newdecl) == FUNCTION_DECL)
1697 check_redeclaration_exception_specification (newdecl, olddecl);
1698 TREE_TYPE (newdecl) = TREE_TYPE (olddecl) = newtype;
1700 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1701 check_default_args (newdecl);
1703 /* Lay the type out, unless already done. */
1704 if (! same_type_p (newtype, oldtype)
1705 && TREE_TYPE (newdecl) != error_mark_node
1706 && !(processing_template_decl && uses_template_parms (newdecl)))
1707 layout_type (TREE_TYPE (newdecl));
1709 if ((TREE_CODE (newdecl) == VAR_DECL
1710 || TREE_CODE (newdecl) == PARM_DECL
1711 || TREE_CODE (newdecl) == RESULT_DECL
1712 || TREE_CODE (newdecl) == FIELD_DECL
1713 || TREE_CODE (newdecl) == TYPE_DECL)
1714 && !(processing_template_decl && uses_template_parms (newdecl)))
1715 layout_decl (newdecl, 0);
1717 /* Merge the type qualifiers. */
1718 if (TREE_READONLY (newdecl))
1719 TREE_READONLY (olddecl) = 1;
1720 if (TREE_THIS_VOLATILE (newdecl))
1721 TREE_THIS_VOLATILE (olddecl) = 1;
1722 if (TREE_NOTHROW (newdecl))
1723 TREE_NOTHROW (olddecl) = 1;
1725 /* Merge deprecatedness. */
1726 if (TREE_DEPRECATED (newdecl))
1727 TREE_DEPRECATED (olddecl) = 1;
1729 /* Merge the initialization information. */
1730 if (DECL_INITIAL (newdecl) == NULL_TREE
1731 && DECL_INITIAL (olddecl) != NULL_TREE)
1733 DECL_INITIAL (newdecl) = DECL_INITIAL (olddecl);
1734 DECL_SOURCE_LOCATION (newdecl) = DECL_SOURCE_LOCATION (olddecl);
1735 if (CAN_HAVE_FULL_LANG_DECL_P (newdecl)
1736 && DECL_LANG_SPECIFIC (newdecl)
1737 && DECL_LANG_SPECIFIC (olddecl))
1739 DECL_SAVED_TREE (newdecl) = DECL_SAVED_TREE (olddecl);
1740 DECL_STRUCT_FUNCTION (newdecl) = DECL_STRUCT_FUNCTION (olddecl);
1744 /* Merge the section attribute.
1745 We want to issue an error if the sections conflict but that must be
1746 done later in decl_attributes since we are called before attributes
1748 if (DECL_SECTION_NAME (newdecl) == NULL_TREE)
1749 DECL_SECTION_NAME (newdecl) = DECL_SECTION_NAME (olddecl);
1751 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1753 DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (newdecl)
1754 |= DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (olddecl);
1755 DECL_NO_LIMIT_STACK (newdecl) |= DECL_NO_LIMIT_STACK (olddecl);
1756 TREE_THIS_VOLATILE (newdecl) |= TREE_THIS_VOLATILE (olddecl);
1757 TREE_READONLY (newdecl) |= TREE_READONLY (olddecl);
1758 TREE_NOTHROW (newdecl) |= TREE_NOTHROW (olddecl);
1759 DECL_IS_MALLOC (newdecl) |= DECL_IS_MALLOC (olddecl);
1760 DECL_IS_PURE (newdecl) |= DECL_IS_PURE (olddecl);
1761 /* Keep the old RTL. */
1762 COPY_DECL_RTL (olddecl, newdecl);
1764 else if (TREE_CODE (newdecl) == VAR_DECL
1765 && (DECL_SIZE (olddecl) || !DECL_SIZE (newdecl)))
1767 /* Keep the old RTL. We cannot keep the old RTL if the old
1768 declaration was for an incomplete object and the new
1769 declaration is not since many attributes of the RTL will
1771 COPY_DECL_RTL (olddecl, newdecl);
1774 /* If cannot merge, then use the new type and qualifiers,
1775 and don't preserve the old rtl. */
1778 /* Clean out any memory we had of the old declaration. */
1779 tree oldstatic = value_member (olddecl, static_aggregates);
1781 TREE_VALUE (oldstatic) = error_mark_node;
1783 TREE_TYPE (olddecl) = TREE_TYPE (newdecl);
1784 TREE_READONLY (olddecl) = TREE_READONLY (newdecl);
1785 TREE_THIS_VOLATILE (olddecl) = TREE_THIS_VOLATILE (newdecl);
1786 TREE_SIDE_EFFECTS (olddecl) = TREE_SIDE_EFFECTS (newdecl);
1789 /* Merge the storage class information. */
1790 merge_weak (newdecl, olddecl);
1792 DECL_ONE_ONLY (newdecl) |= DECL_ONE_ONLY (olddecl);
1793 DECL_DEFER_OUTPUT (newdecl) |= DECL_DEFER_OUTPUT (olddecl);
1794 TREE_PUBLIC (newdecl) = TREE_PUBLIC (olddecl);
1795 TREE_STATIC (olddecl) = TREE_STATIC (newdecl) |= TREE_STATIC (olddecl);
1796 if (! DECL_EXTERNAL (olddecl))
1797 DECL_EXTERNAL (newdecl) = 0;
1799 new_template = NULL_TREE;
1800 if (DECL_LANG_SPECIFIC (newdecl) && DECL_LANG_SPECIFIC (olddecl))
1802 DECL_INTERFACE_KNOWN (newdecl) |= DECL_INTERFACE_KNOWN (olddecl);
1803 DECL_NOT_REALLY_EXTERN (newdecl) |= DECL_NOT_REALLY_EXTERN (olddecl);
1804 DECL_COMDAT (newdecl) |= DECL_COMDAT (olddecl);
1805 DECL_TEMPLATE_INSTANTIATED (newdecl)
1806 |= DECL_TEMPLATE_INSTANTIATED (olddecl);
1808 /* If the OLDDECL is an instantiation and/or specialization,
1809 then the NEWDECL must be too. But, it may not yet be marked
1810 as such if the caller has created NEWDECL, but has not yet
1811 figured out that it is a redeclaration. */
1812 if (!DECL_USE_TEMPLATE (newdecl))
1813 DECL_USE_TEMPLATE (newdecl) = DECL_USE_TEMPLATE (olddecl);
1815 /* Don't really know how much of the language-specific
1816 values we should copy from old to new. */
1817 DECL_IN_AGGR_P (newdecl) = DECL_IN_AGGR_P (olddecl);
1818 DECL_LANG_SPECIFIC (newdecl)->decl_flags.u2 =
1819 DECL_LANG_SPECIFIC (olddecl)->decl_flags.u2;
1820 DECL_NONCONVERTING_P (newdecl) = DECL_NONCONVERTING_P (olddecl);
1821 DECL_REPO_AVAILABLE_P (newdecl) = DECL_REPO_AVAILABLE_P (olddecl);
1822 if (DECL_TEMPLATE_INFO (newdecl))
1823 new_template = DECL_TI_TEMPLATE (newdecl);
1824 DECL_TEMPLATE_INFO (newdecl) = DECL_TEMPLATE_INFO (olddecl);
1825 DECL_INITIALIZED_IN_CLASS_P (newdecl)
1826 |= DECL_INITIALIZED_IN_CLASS_P (olddecl);
1827 olddecl_friend = DECL_FRIEND_P (olddecl);
1828 hidden_friend = (DECL_ANTICIPATED (olddecl)
1829 && DECL_HIDDEN_FRIEND_P (olddecl)
1830 && newdecl_is_friend);
1832 /* Only functions have DECL_BEFRIENDING_CLASSES. */
1833 if (TREE_CODE (newdecl) == FUNCTION_DECL
1834 || DECL_FUNCTION_TEMPLATE_P (newdecl))
1836 DECL_BEFRIENDING_CLASSES (newdecl)
1837 = chainon (DECL_BEFRIENDING_CLASSES (newdecl),
1838 DECL_BEFRIENDING_CLASSES (olddecl));
1839 /* DECL_THUNKS is only valid for virtual functions,
1840 otherwise it is a DECL_FRIEND_CONTEXT. */
1841 if (DECL_VIRTUAL_P (newdecl))
1842 DECL_THUNKS (newdecl) = DECL_THUNKS (olddecl);
1846 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1848 if (DECL_TEMPLATE_INSTANTIATION (olddecl)
1849 && !DECL_TEMPLATE_INSTANTIATION (newdecl))
1851 /* If newdecl is not a specialization, then it is not a
1852 template-related function at all. And that means that we
1853 should have exited above, returning 0. */
1854 gcc_assert (DECL_TEMPLATE_SPECIALIZATION (newdecl));
1856 if (TREE_USED (olddecl))
1857 /* From [temp.expl.spec]:
1859 If a template, a member template or the member of a class
1860 template is explicitly specialized then that
1861 specialization shall be declared before the first use of
1862 that specialization that would cause an implicit
1863 instantiation to take place, in every translation unit in
1864 which such a use occurs. */
1865 error ("explicit specialization of %qD after first use",
1868 SET_DECL_TEMPLATE_SPECIALIZATION (olddecl);
1870 /* Don't propagate visibility from the template to the
1871 specialization here. We'll do that in determine_visibility if
1873 DECL_VISIBILITY_SPECIFIED (olddecl) = 0;
1875 /* [temp.expl.spec/14] We don't inline explicit specialization
1876 just because the primary template says so. */
1880 if (DECL_PENDING_INLINE_INFO (newdecl) == 0)
1881 DECL_PENDING_INLINE_INFO (newdecl) = DECL_PENDING_INLINE_INFO (olddecl);
1883 DECL_DECLARED_INLINE_P (newdecl) |= DECL_DECLARED_INLINE_P (olddecl);
1885 /* If either decl says `inline', this fn is inline, unless
1886 its definition was passed already. */
1887 if (DECL_INLINE (newdecl) && DECL_INITIAL (olddecl) == NULL_TREE)
1888 DECL_INLINE (olddecl) = 1;
1889 DECL_INLINE (newdecl) = DECL_INLINE (olddecl);
1891 DECL_UNINLINABLE (newdecl) = DECL_UNINLINABLE (olddecl)
1892 = (DECL_UNINLINABLE (newdecl) || DECL_UNINLINABLE (olddecl));
1895 /* Preserve abstractness on cloned [cd]tors. */
1896 DECL_ABSTRACT (newdecl) = DECL_ABSTRACT (olddecl);
1900 SET_DECL_LANGUAGE (olddecl, DECL_LANGUAGE (newdecl));
1901 COPY_DECL_ASSEMBLER_NAME (newdecl, olddecl);
1902 COPY_DECL_RTL (newdecl, olddecl);
1904 if (! types_match || new_defines_function)
1906 /* These need to be copied so that the names are available.
1907 Note that if the types do match, we'll preserve inline
1908 info and other bits, but if not, we won't. */
1909 DECL_ARGUMENTS (olddecl) = DECL_ARGUMENTS (newdecl);
1910 DECL_RESULT (olddecl) = DECL_RESULT (newdecl);
1912 if (new_defines_function)
1913 /* If defining a function declared with other language
1914 linkage, use the previously declared language linkage. */
1915 SET_DECL_LANGUAGE (newdecl, DECL_LANGUAGE (olddecl));
1916 else if (types_match)
1918 /* If redeclaring a builtin function, and not a definition,
1919 it stays built in. */
1920 if (DECL_BUILT_IN (olddecl))
1922 DECL_BUILT_IN_CLASS (newdecl) = DECL_BUILT_IN_CLASS (olddecl);
1923 DECL_FUNCTION_CODE (newdecl) = DECL_FUNCTION_CODE (olddecl);
1924 /* If we're keeping the built-in definition, keep the rtl,
1925 regardless of declaration matches. */
1926 COPY_DECL_RTL (olddecl, newdecl);
1929 DECL_RESULT (newdecl) = DECL_RESULT (olddecl);
1930 /* Don't clear out the arguments if we're redefining a function. */
1931 if (DECL_ARGUMENTS (olddecl))
1932 DECL_ARGUMENTS (newdecl) = DECL_ARGUMENTS (olddecl);
1935 else if (TREE_CODE (newdecl) == NAMESPACE_DECL)
1936 NAMESPACE_LEVEL (newdecl) = NAMESPACE_LEVEL (olddecl);
1938 /* Now preserve various other info from the definition. */
1939 TREE_ADDRESSABLE (newdecl) = TREE_ADDRESSABLE (olddecl);
1940 TREE_ASM_WRITTEN (newdecl) = TREE_ASM_WRITTEN (olddecl);
1941 DECL_COMMON (newdecl) = DECL_COMMON (olddecl);
1942 COPY_DECL_ASSEMBLER_NAME (olddecl, newdecl);
1944 /* Warn about conflicting visibility specifications. */
1945 if (DECL_VISIBILITY_SPECIFIED (olddecl)
1946 && DECL_VISIBILITY_SPECIFIED (newdecl)
1947 && DECL_VISIBILITY (newdecl) != DECL_VISIBILITY (olddecl))
1949 warning (OPT_Wattributes, "%q+D: visibility attribute ignored "
1950 "because it", newdecl);
1951 warning (OPT_Wattributes, "%Jconflicts with previous "
1952 "declaration here", olddecl);
1954 /* Choose the declaration which specified visibility. */
1955 if (DECL_VISIBILITY_SPECIFIED (olddecl))
1957 DECL_VISIBILITY (newdecl) = DECL_VISIBILITY (olddecl);
1958 DECL_VISIBILITY_SPECIFIED (newdecl) = 1;
1960 /* Init priority used to be merged from newdecl to olddecl by the memcpy,
1961 so keep this behavior. */
1962 if (TREE_CODE (newdecl) == VAR_DECL && DECL_HAS_INIT_PRIORITY_P (newdecl))
1964 SET_DECL_INIT_PRIORITY (olddecl, DECL_INIT_PRIORITY (newdecl));
1965 DECL_HAS_INIT_PRIORITY_P (olddecl) = 1;
1968 /* The DECL_LANG_SPECIFIC information in OLDDECL will be replaced
1969 with that from NEWDECL below. */
1970 if (DECL_LANG_SPECIFIC (olddecl))
1972 gcc_assert (DECL_LANG_SPECIFIC (olddecl)
1973 != DECL_LANG_SPECIFIC (newdecl));
1974 ggc_free (DECL_LANG_SPECIFIC (olddecl));
1977 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1981 function_size = sizeof (struct tree_decl_common);
1983 memcpy ((char *) olddecl + sizeof (struct tree_common),
1984 (char *) newdecl + sizeof (struct tree_common),
1985 function_size - sizeof (struct tree_common));
1987 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
1988 (char *) newdecl + sizeof (struct tree_decl_common),
1989 sizeof (struct tree_function_decl) - sizeof (struct tree_decl_common));
1991 /* If newdecl is a template instantiation, it is possible that
1992 the following sequence of events has occurred:
1994 o A friend function was declared in a class template. The
1995 class template was instantiated.
1997 o The instantiation of the friend declaration was
1998 recorded on the instantiation list, and is newdecl.
2000 o Later, however, instantiate_class_template called pushdecl
2001 on the newdecl to perform name injection. But, pushdecl in
2002 turn called duplicate_decls when it discovered that another
2003 declaration of a global function with the same name already
2006 o Here, in duplicate_decls, we decided to clobber newdecl.
2008 If we're going to do that, we'd better make sure that
2009 olddecl, and not newdecl, is on the list of
2010 instantiations so that if we try to do the instantiation
2011 again we won't get the clobbered declaration. */
2012 reregister_specialization (newdecl,
2018 size_t size = tree_code_size (TREE_CODE (olddecl));
2019 memcpy ((char *) olddecl + sizeof (struct tree_common),
2020 (char *) newdecl + sizeof (struct tree_common),
2021 sizeof (struct tree_decl_common) - sizeof (struct tree_common));
2022 switch (TREE_CODE (olddecl))
2032 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
2033 (char *) newdecl + sizeof (struct tree_decl_common),
2034 size - sizeof (struct tree_decl_common)
2035 + TREE_CODE_LENGTH (TREE_CODE (newdecl)) * sizeof (char *));
2039 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
2040 (char *) newdecl + sizeof (struct tree_decl_common),
2041 sizeof (struct tree_decl_non_common) - sizeof (struct tree_decl_common)
2042 + TREE_CODE_LENGTH (TREE_CODE (newdecl)) * sizeof (char *));
2046 DECL_UID (olddecl) = olddecl_uid;
2048 DECL_FRIEND_P (olddecl) = 1;
2051 DECL_ANTICIPATED (olddecl) = 1;
2052 DECL_HIDDEN_FRIEND_P (olddecl) = 1;
2055 /* NEWDECL contains the merged attribute lists.
2056 Update OLDDECL to be the same. */
2057 DECL_ATTRIBUTES (olddecl) = DECL_ATTRIBUTES (newdecl);
2059 /* If OLDDECL had its DECL_RTL instantiated, re-invoke make_decl_rtl
2060 so that encode_section_info has a chance to look at the new decl
2061 flags and attributes. */
2062 if (DECL_RTL_SET_P (olddecl)
2063 && (TREE_CODE (olddecl) == FUNCTION_DECL
2064 || (TREE_CODE (olddecl) == VAR_DECL
2065 && TREE_STATIC (olddecl))))
2066 make_decl_rtl (olddecl);
2068 /* The NEWDECL will no longer be needed. Because every out-of-class
2069 declaration of a member results in a call to duplicate_decls,
2070 freeing these nodes represents in a significant savings. */
2076 /* Return zero if the declaration NEWDECL is valid
2077 when the declaration OLDDECL (assumed to be for the same name)
2078 has already been seen.
2079 Otherwise return an error message format string with a %s
2080 where the identifier should go. */
2083 redeclaration_error_message (tree newdecl, tree olddecl)
2085 if (TREE_CODE (newdecl) == TYPE_DECL)
2087 /* Because C++ can put things into name space for free,
2088 constructs like "typedef struct foo { ... } foo"
2089 would look like an erroneous redeclaration. */
2090 if (same_type_p (TREE_TYPE (newdecl), TREE_TYPE (olddecl)))
2093 return "redefinition of %q#D";
2095 else if (TREE_CODE (newdecl) == FUNCTION_DECL)
2097 /* If this is a pure function, its olddecl will actually be
2098 the original initialization to `0' (which we force to call
2099 abort()). Don't complain about redefinition in this case. */
2100 if (DECL_LANG_SPECIFIC (olddecl) && DECL_PURE_VIRTUAL_P (olddecl)
2101 && DECL_INITIAL (olddecl) == NULL_TREE)
2104 /* If both functions come from different namespaces, this is not
2105 a redeclaration - this is a conflict with a used function. */
2106 if (DECL_NAMESPACE_SCOPE_P (olddecl)
2107 && DECL_CONTEXT (olddecl) != DECL_CONTEXT (newdecl)
2108 && ! decls_match (olddecl, newdecl))
2109 return "%qD conflicts with used function";
2111 /* We'll complain about linkage mismatches in
2112 warn_extern_redeclared_static. */
2114 /* Defining the same name twice is no good. */
2115 if (DECL_INITIAL (olddecl) != NULL_TREE
2116 && DECL_INITIAL (newdecl) != NULL_TREE)
2118 if (DECL_NAME (olddecl) == NULL_TREE)
2119 return "%q#D not declared in class";
2121 return "redefinition of %q#D";
2125 else if (TREE_CODE (newdecl) == TEMPLATE_DECL)
2129 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
2131 if (COMPLETE_TYPE_P (TREE_TYPE (newdecl))
2132 && COMPLETE_TYPE_P (TREE_TYPE (olddecl)))
2133 return "redefinition of %q#D";
2137 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) != FUNCTION_DECL
2138 || (DECL_TEMPLATE_RESULT (newdecl)
2139 == DECL_TEMPLATE_RESULT (olddecl)))
2142 nt = DECL_TEMPLATE_RESULT (newdecl);
2143 if (DECL_TEMPLATE_INFO (nt))
2144 nt = DECL_TEMPLATE_RESULT (template_for_substitution (nt));
2145 ot = DECL_TEMPLATE_RESULT (olddecl);
2146 if (DECL_TEMPLATE_INFO (ot))
2147 ot = DECL_TEMPLATE_RESULT (template_for_substitution (ot));
2148 if (DECL_INITIAL (nt) && DECL_INITIAL (ot))
2149 return "redefinition of %q#D";
2153 else if (TREE_CODE (newdecl) == VAR_DECL
2154 && DECL_THREAD_LOCAL_P (newdecl) != DECL_THREAD_LOCAL_P (olddecl)
2155 && (! DECL_LANG_SPECIFIC (olddecl)
2156 || ! CP_DECL_THREADPRIVATE_P (olddecl)
2157 || DECL_THREAD_LOCAL_P (newdecl)))
2159 /* Only variables can be thread-local, and all declarations must
2160 agree on this property. */
2161 if (DECL_THREAD_LOCAL_P (newdecl))
2162 return "thread-local declaration of %q#D follows "
2163 "non-thread-local declaration";
2165 return "non-thread-local declaration of %q#D follows "
2166 "thread-local declaration";
2168 else if (toplevel_bindings_p () || DECL_NAMESPACE_SCOPE_P (newdecl))
2170 /* Objects declared at top level: */
2171 /* If at least one is a reference, it's ok. */
2172 if (DECL_EXTERNAL (newdecl) || DECL_EXTERNAL (olddecl))
2174 /* Reject two definitions. */
2175 return "redefinition of %q#D";
2179 /* Objects declared with block scope: */
2180 /* Reject two definitions, and reject a definition
2181 together with an external reference. */
2182 if (!(DECL_EXTERNAL (newdecl) && DECL_EXTERNAL (olddecl)))
2183 return "redeclaration of %q#D";
2188 /* Hash and equality functions for the named_label table. */
2191 named_label_entry_hash (const void *data)
2193 const struct named_label_entry *ent = (const struct named_label_entry *) data;
2194 return DECL_UID (ent->label_decl);
2198 named_label_entry_eq (const void *a, const void *b)
2200 const struct named_label_entry *ent_a = (const struct named_label_entry *) a;
2201 const struct named_label_entry *ent_b = (const struct named_label_entry *) b;
2202 return ent_a->label_decl == ent_b->label_decl;
2205 /* Create a new label, named ID. */
2208 make_label_decl (tree id, int local_p)
2210 struct named_label_entry *ent;
2214 decl = build_decl (LABEL_DECL, id, void_type_node);
2216 DECL_CONTEXT (decl) = current_function_decl;
2217 DECL_MODE (decl) = VOIDmode;
2218 C_DECLARED_LABEL_FLAG (decl) = local_p;
2220 /* Say where one reference is to the label, for the sake of the
2221 error if it is not defined. */
2222 DECL_SOURCE_LOCATION (decl) = input_location;
2224 /* Record the fact that this identifier is bound to this label. */
2225 SET_IDENTIFIER_LABEL_VALUE (id, decl);
2227 /* Create the label htab for the function on demand. */
2229 named_labels = htab_create_ggc (13, named_label_entry_hash,
2230 named_label_entry_eq, NULL);
2232 /* Record this label on the list of labels used in this function.
2233 We do this before calling make_label_decl so that we get the
2234 IDENTIFIER_LABEL_VALUE before the new label is declared. */
2235 ent = GGC_CNEW (struct named_label_entry);
2236 ent->label_decl = decl;
2238 slot = htab_find_slot (named_labels, ent, INSERT);
2239 gcc_assert (*slot == NULL);
2245 /* Look for a label named ID in the current function. If one cannot
2246 be found, create one. (We keep track of used, but undefined,
2247 labels, and complain about them at the end of a function.) */
2250 lookup_label (tree id)
2254 timevar_push (TV_NAME_LOOKUP);
2255 /* You can't use labels at global scope. */
2256 if (current_function_decl == NULL_TREE)
2258 error ("label %qE referenced outside of any function", id);
2259 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, NULL_TREE);
2262 /* See if we've already got this label. */
2263 decl = IDENTIFIER_LABEL_VALUE (id);
2264 if (decl != NULL_TREE && DECL_CONTEXT (decl) == current_function_decl)
2265 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2267 decl = make_label_decl (id, /*local_p=*/0);
2268 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2271 /* Declare a local label named ID. */
2274 declare_local_label (tree id)
2278 /* Add a new entry to the SHADOWED_LABELS list so that when we leave
2279 this scope we can restore the old value of IDENTIFIER_TYPE_VALUE. */
2280 shadow = tree_cons (IDENTIFIER_LABEL_VALUE (id), NULL_TREE,
2281 current_binding_level->shadowed_labels);
2282 current_binding_level->shadowed_labels = shadow;
2284 decl = make_label_decl (id, /*local_p=*/1);
2285 TREE_VALUE (shadow) = decl;
2290 /* Returns nonzero if it is ill-formed to jump past the declaration of
2291 DECL. Returns 2 if it's also a real problem. */
2294 decl_jump_unsafe (tree decl)
2296 if (TREE_CODE (decl) != VAR_DECL || TREE_STATIC (decl)
2297 || TREE_TYPE (decl) == error_mark_node)
2300 if (TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl))
2301 || DECL_NONTRIVIALLY_INITIALIZED_P (decl))
2304 if (pod_type_p (TREE_TYPE (decl)))
2307 /* The POD stuff is just pedantry; why should it matter if the class
2308 contains a field of pointer to member type? */
2312 /* A subroutine of check_previous_goto_1 to identify a branch to the user. */
2315 identify_goto (tree decl, const location_t *locus)
2318 pedwarn ("jump to label %qD", decl);
2320 pedwarn ("jump to case label");
2322 pedwarn ("%H from here", locus);
2325 /* Check that a single previously seen jump to a newly defined label
2326 is OK. DECL is the LABEL_DECL or 0; LEVEL is the binding_level for
2327 the jump context; NAMES are the names in scope in LEVEL at the jump
2328 context; LOCUS is the source position of the jump or 0. Returns
2329 true if all is well. */
2332 check_previous_goto_1 (tree decl, struct cp_binding_level* level, tree names,
2333 bool exited_omp, const location_t *locus)
2335 struct cp_binding_level *b;
2336 bool identified = false, saw_eh = false, saw_omp = false;
2340 identify_goto (decl, locus);
2341 error (" exits OpenMP structured block");
2342 identified = saw_omp = true;
2345 for (b = current_binding_level; b ; b = b->level_chain)
2347 tree new_decls, old_decls = (b == level ? names : NULL_TREE);
2349 for (new_decls = b->names; new_decls != old_decls;
2350 new_decls = TREE_CHAIN (new_decls))
2352 int problem = decl_jump_unsafe (new_decls);
2358 identify_goto (decl, locus);
2362 error (" crosses initialization of %q+#D", new_decls);
2364 pedwarn (" enters scope of non-POD %q+#D", new_decls);
2369 if ((b->kind == sk_try || b->kind == sk_catch) && !saw_eh)
2373 identify_goto (decl, locus);
2376 if (b->kind == sk_try)
2377 error (" enters try block");
2379 error (" enters catch block");
2382 if (b->kind == sk_omp && !saw_omp)
2386 identify_goto (decl, locus);
2389 error (" enters OpenMP structured block");
2398 check_previous_goto (tree decl, struct named_label_use_entry *use)
2400 check_previous_goto_1 (decl, use->binding_level,
2401 use->names_in_scope, use->in_omp_scope,
2402 &use->o_goto_locus);
2406 check_switch_goto (struct cp_binding_level* level)
2408 return check_previous_goto_1 (NULL_TREE, level, level->names, false, NULL);
2411 /* Check that a new jump to a label DECL is OK. Called by
2412 finish_goto_stmt. */
2415 check_goto (tree decl)
2417 struct named_label_entry *ent, dummy;
2418 bool saw_catch = false, identified = false;
2421 /* We can't know where a computed goto is jumping.
2422 So we assume that it's OK. */
2423 if (TREE_CODE (decl) != LABEL_DECL)
2426 /* We didn't record any information about this label when we created it,
2427 and there's not much point since it's trivial to analyze as a return. */
2428 if (decl == cdtor_label)
2431 dummy.label_decl = decl;
2432 ent = (struct named_label_entry *) htab_find (named_labels, &dummy);
2433 gcc_assert (ent != NULL);
2435 /* If the label hasn't been defined yet, defer checking. */
2436 if (! DECL_INITIAL (decl))
2438 struct named_label_use_entry *new_use;
2440 /* Don't bother creating another use if the last goto had the
2441 same data, and will therefore create the same set of errors. */
2443 && ent->uses->names_in_scope == current_binding_level->names)
2446 new_use = GGC_NEW (struct named_label_use_entry);
2447 new_use->binding_level = current_binding_level;
2448 new_use->names_in_scope = current_binding_level->names;
2449 new_use->o_goto_locus = input_location;
2450 new_use->in_omp_scope = false;
2452 new_use->next = ent->uses;
2453 ent->uses = new_use;
2457 if (ent->in_try_scope || ent->in_catch_scope
2458 || ent->in_omp_scope || ent->bad_decls)
2460 pedwarn ("jump to label %q+D", decl);
2461 pedwarn (" from here");
2465 for (bad = ent->bad_decls; bad; bad = TREE_CHAIN (bad))
2467 tree b = TREE_VALUE (bad);
2468 int u = decl_jump_unsafe (b);
2470 if (u > 1 && DECL_ARTIFICIAL (b))
2472 /* Can't skip init of __exception_info. */
2473 error ("%J enters catch block", b);
2477 error (" skips initialization of %q+#D", b);
2479 pedwarn (" enters scope of non-POD %q+#D", b);
2482 if (ent->in_try_scope)
2483 error (" enters try block");
2484 else if (ent->in_catch_scope && !saw_catch)
2485 error (" enters catch block");
2487 if (ent->in_omp_scope)
2488 error (" enters OpenMP structured block");
2489 else if (flag_openmp)
2491 struct cp_binding_level *b;
2492 for (b = current_binding_level; b ; b = b->level_chain)
2494 if (b == ent->binding_level)
2496 if (b->kind == sk_omp)
2500 pedwarn ("jump to label %q+D", decl);
2501 pedwarn (" from here");
2504 error (" exits OpenMP structured block");
2511 /* Check that a return is ok wrt OpenMP structured blocks.
2512 Called by finish_return_stmt. Returns true if all is well. */
2515 check_omp_return (void)
2517 struct cp_binding_level *b;
2518 for (b = current_binding_level; b ; b = b->level_chain)
2519 if (b->kind == sk_omp)
2521 error ("invalid exit from OpenMP structured block");
2527 /* Define a label, specifying the location in the source file.
2528 Return the LABEL_DECL node for the label. */
2531 define_label (location_t location, tree name)
2533 struct named_label_entry *ent, dummy;
2534 struct cp_binding_level *p;
2537 timevar_push (TV_NAME_LOOKUP);
2539 decl = lookup_label (name);
2541 dummy.label_decl = decl;
2542 ent = (struct named_label_entry *) htab_find (named_labels, &dummy);
2543 gcc_assert (ent != NULL);
2545 /* After labels, make any new cleanups in the function go into their
2546 own new (temporary) binding contour. */
2547 for (p = current_binding_level;
2548 p->kind != sk_function_parms;
2550 p->more_cleanups_ok = 0;
2552 if (name == get_identifier ("wchar_t"))
2553 pedwarn ("label named wchar_t");
2555 if (DECL_INITIAL (decl) != NULL_TREE)
2557 error ("duplicate label %qD", decl);
2558 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
2562 struct named_label_use_entry *use;
2564 /* Mark label as having been defined. */
2565 DECL_INITIAL (decl) = error_mark_node;
2566 /* Say where in the source. */
2567 DECL_SOURCE_LOCATION (decl) = location;
2569 ent->binding_level = current_binding_level;
2570 ent->names_in_scope = current_binding_level->names;
2572 for (use = ent->uses; use ; use = use->next)
2573 check_previous_goto (decl, use);
2577 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2582 struct cp_binding_level *level;
2583 struct cp_switch *next;
2584 /* The SWITCH_STMT being built. */
2586 /* A splay-tree mapping the low element of a case range to the high
2587 element, or NULL_TREE if there is no high element. Used to
2588 determine whether or not a new case label duplicates an old case
2589 label. We need a tree, rather than simply a hash table, because
2590 of the GNU case range extension. */
2594 /* A stack of the currently active switch statements. The innermost
2595 switch statement is on the top of the stack. There is no need to
2596 mark the stack for garbage collection because it is only active
2597 during the processing of the body of a function, and we never
2598 collect at that point. */
2600 static struct cp_switch *switch_stack;
2602 /* Called right after a switch-statement condition is parsed.
2603 SWITCH_STMT is the switch statement being parsed. */
2606 push_switch (tree switch_stmt)
2608 struct cp_switch *p = XNEW (struct cp_switch);
2609 p->level = current_binding_level;
2610 p->next = switch_stack;
2611 p->switch_stmt = switch_stmt;
2612 p->cases = splay_tree_new (case_compare, NULL, NULL);
2619 struct cp_switch *cs = switch_stack;
2620 location_t switch_location;
2622 /* Emit warnings as needed. */
2623 if (EXPR_HAS_LOCATION (cs->switch_stmt))
2624 switch_location = EXPR_LOCATION (cs->switch_stmt);
2626 switch_location = input_location;
2627 if (!processing_template_decl)
2628 c_do_switch_warnings (cs->cases, switch_location,
2629 SWITCH_STMT_TYPE (cs->switch_stmt),
2630 SWITCH_STMT_COND (cs->switch_stmt));
2632 splay_tree_delete (cs->cases);
2633 switch_stack = switch_stack->next;
2637 /* Note that we've seen a definition of a case label, and complain if this
2638 is a bad place for one. */
2641 finish_case_label (tree low_value, tree high_value)
2644 struct cp_binding_level *p;
2646 if (processing_template_decl)
2650 /* For templates, just add the case label; we'll do semantic
2651 analysis at instantiation-time. */
2652 label = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
2653 return add_stmt (build_case_label (low_value, high_value, label));
2656 /* Find the condition on which this switch statement depends. */
2657 cond = SWITCH_STMT_COND (switch_stack->switch_stmt);
2658 if (cond && TREE_CODE (cond) == TREE_LIST)
2659 cond = TREE_VALUE (cond);
2661 if (!check_switch_goto (switch_stack->level))
2662 return error_mark_node;
2664 r = c_add_case_label (switch_stack->cases, cond, TREE_TYPE (cond),
2665 low_value, high_value);
2667 /* After labels, make any new cleanups in the function go into their
2668 own new (temporary) binding contour. */
2669 for (p = current_binding_level;
2670 p->kind != sk_function_parms;
2672 p->more_cleanups_ok = 0;
2677 /* Hash a TYPENAME_TYPE. K is really of type `tree'. */
2680 typename_hash (const void* k)
2685 hash = (htab_hash_pointer (TYPE_CONTEXT (t))
2686 ^ htab_hash_pointer (DECL_NAME (TYPE_NAME (t))));
2691 typedef struct typename_info {
2699 /* Compare two TYPENAME_TYPEs. K1 is really of type `tree', K2 is
2700 really of type `typename_info*' */
2703 typename_compare (const void * k1, const void * k2)
2706 const typename_info *t2;
2709 t2 = (const typename_info *) k2;
2711 return (DECL_NAME (TYPE_NAME (t1)) == t2->name
2712 && TYPE_CONTEXT (t1) == t2->scope
2713 && TYPENAME_TYPE_FULLNAME (t1) == t2->template_id
2714 && TYPENAME_IS_ENUM_P (t1) == t2->enum_p
2715 && TYPENAME_IS_CLASS_P (t1) == t2->class_p);
2718 /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
2719 the type of `T', NAME is the IDENTIFIER_NODE for `t'.
2721 Returns the new TYPENAME_TYPE. */
2723 static GTY ((param_is (union tree_node))) htab_t typename_htab;
2726 build_typename_type (tree context, tree name, tree fullname,
2727 enum tag_types tag_type)
2735 if (typename_htab == NULL)
2736 typename_htab = htab_create_ggc (61, &typename_hash,
2737 &typename_compare, NULL);
2739 ti.scope = FROB_CONTEXT (context);
2741 ti.template_id = fullname;
2742 ti.enum_p = tag_type == enum_type;
2743 ti.class_p = (tag_type == class_type
2744 || tag_type == record_type
2745 || tag_type == union_type);
2746 hash = (htab_hash_pointer (ti.scope)
2747 ^ htab_hash_pointer (ti.name));
2749 /* See if we already have this type. */
2750 e = htab_find_slot_with_hash (typename_htab, &ti, hash, INSERT);
2755 /* Build the TYPENAME_TYPE. */
2756 t = make_aggr_type (TYPENAME_TYPE);
2757 TYPE_CONTEXT (t) = ti.scope;
2758 TYPENAME_TYPE_FULLNAME (t) = ti.template_id;
2759 TYPENAME_IS_ENUM_P (t) = ti.enum_p;
2760 TYPENAME_IS_CLASS_P (t) = ti.class_p;
2762 /* Build the corresponding TYPE_DECL. */
2763 d = build_decl (TYPE_DECL, name, t);
2764 TYPE_NAME (TREE_TYPE (d)) = d;
2765 TYPE_STUB_DECL (TREE_TYPE (d)) = d;
2766 DECL_CONTEXT (d) = FROB_CONTEXT (context);
2767 DECL_ARTIFICIAL (d) = 1;
2769 /* Store it in the hash table. */
2772 /* TYPENAME_TYPEs must always be compared structurally, because
2773 they may or may not resolve down to another type depending on
2774 the currently open classes. */
2775 SET_TYPE_STRUCTURAL_EQUALITY (t);
2781 /* Resolve `typename CONTEXT::NAME'. TAG_TYPE indicates the tag
2782 provided to name the type. Returns an appropriate type, unless an
2783 error occurs, in which case error_mark_node is returned. If we
2784 locate a non-artificial TYPE_DECL and TF_KEEP_TYPE_DECL is set, we
2785 return that, rather than the _TYPE it corresponds to, in other
2786 cases we look through the type decl. If TF_ERROR is set, complain
2787 about errors, otherwise be quiet. */
2790 make_typename_type (tree context, tree name, enum tag_types tag_type,
2791 tsubst_flags_t complain)
2797 if (name == error_mark_node
2798 || context == NULL_TREE
2799 || context == error_mark_node)
2800 return error_mark_node;
2804 if (!(TYPE_LANG_SPECIFIC (name)
2805 && (CLASSTYPE_IS_TEMPLATE (name)
2806 || CLASSTYPE_USE_TEMPLATE (name))))
2807 name = TYPE_IDENTIFIER (name);
2809 /* Create a TEMPLATE_ID_EXPR for the type. */
2810 name = build_nt (TEMPLATE_ID_EXPR,
2811 CLASSTYPE_TI_TEMPLATE (name),
2812 CLASSTYPE_TI_ARGS (name));
2814 else if (TREE_CODE (name) == TYPE_DECL)
2815 name = DECL_NAME (name);
2819 if (TREE_CODE (name) == TEMPLATE_ID_EXPR)
2821 name = TREE_OPERAND (name, 0);
2822 if (TREE_CODE (name) == TEMPLATE_DECL)
2823 name = TREE_OPERAND (fullname, 0) = DECL_NAME (name);
2824 else if (TREE_CODE (name) == OVERLOAD)
2826 error ("%qD is not a type", name);
2827 return error_mark_node;
2830 if (TREE_CODE (name) == TEMPLATE_DECL)
2832 error ("%qD used without template parameters", name);
2833 return error_mark_node;
2835 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
2836 gcc_assert (TYPE_P (context));
2838 /* When the CONTEXT is a dependent type, NAME could refer to a
2839 dependent base class of CONTEXT. So we cannot peek inside it,
2840 even if CONTEXT is a currently open scope. */
2841 if (dependent_type_p (context))
2842 return build_typename_type (context, name, fullname, tag_type);
2844 if (!IS_AGGR_TYPE (context))
2846 if (complain & tf_error)
2847 error ("%q#T is not a class", context);
2848 return error_mark_node;
2851 want_template = TREE_CODE (fullname) == TEMPLATE_ID_EXPR;
2853 /* We should only set WANT_TYPE when we're a nested typename type.
2854 Then we can give better diagnostics if we find a non-type. */
2855 t = lookup_field (context, name, 0, /*want_type=*/true);
2858 if (complain & tf_error)
2859 error (want_template ? "no class template named %q#T in %q#T"
2860 : "no type named %q#T in %q#T", name, context);
2861 return error_mark_node;
2864 if (want_template && !DECL_CLASS_TEMPLATE_P (t))
2866 if (complain & tf_error)
2867 error ("%<typename %T::%D%> names %q#T, which is not a class template",
2869 return error_mark_node;
2871 if (!want_template && TREE_CODE (t) != TYPE_DECL)
2873 if (complain & tf_error)
2874 error ("%<typename %T::%D%> names %q#T, which is not a type",
2876 return error_mark_node;
2879 if (complain & tf_error)
2880 perform_or_defer_access_check (TYPE_BINFO (context), t, t);
2883 return lookup_template_class (t, TREE_OPERAND (fullname, 1),
2885 /*entering_scope=*/0,
2886 tf_warning_or_error | tf_user);
2888 if (DECL_ARTIFICIAL (t) || !(complain & tf_keep_type_decl))
2894 /* Resolve `CONTEXT::template NAME'. Returns a TEMPLATE_DECL if the name
2895 can be resolved or an UNBOUND_CLASS_TEMPLATE, unless an error occurs,
2896 in which case error_mark_node is returned.
2898 If PARM_LIST is non-NULL, also make sure that the template parameter
2899 list of TEMPLATE_DECL matches.
2901 If COMPLAIN zero, don't complain about any errors that occur. */
2904 make_unbound_class_template (tree context, tree name, tree parm_list,
2905 tsubst_flags_t complain)
2911 name = TYPE_IDENTIFIER (name);
2912 else if (DECL_P (name))
2913 name = DECL_NAME (name);
2914 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
2916 if (!dependent_type_p (context)
2917 || currently_open_class (context))
2919 tree tmpl = NULL_TREE;
2921 if (IS_AGGR_TYPE (context))
2922 tmpl = lookup_field (context, name, 0, false);
2924 if (!tmpl || !DECL_CLASS_TEMPLATE_P (tmpl))
2926 if (complain & tf_error)
2927 error ("no class template named %q#T in %q#T", name, context);
2928 return error_mark_node;
2932 && !comp_template_parms (DECL_TEMPLATE_PARMS (tmpl), parm_list))
2934 if (complain & tf_error)
2936 error ("template parameters do not match template");
2937 error ("%q+D declared here", tmpl);
2939 return error_mark_node;
2942 if (complain & tf_error)
2943 perform_or_defer_access_check (TYPE_BINFO (context), tmpl, tmpl);
2948 /* Build the UNBOUND_CLASS_TEMPLATE. */
2949 t = make_aggr_type (UNBOUND_CLASS_TEMPLATE);
2950 TYPE_CONTEXT (t) = FROB_CONTEXT (context);
2951 TREE_TYPE (t) = NULL_TREE;
2952 SET_TYPE_STRUCTURAL_EQUALITY (t);
2954 /* Build the corresponding TEMPLATE_DECL. */
2955 d = build_decl (TEMPLATE_DECL, name, t);
2956 TYPE_NAME (TREE_TYPE (d)) = d;
2957 TYPE_STUB_DECL (TREE_TYPE (d)) = d;
2958 DECL_CONTEXT (d) = FROB_CONTEXT (context);
2959 DECL_ARTIFICIAL (d) = 1;
2960 DECL_TEMPLATE_PARMS (d) = parm_list;
2967 /* Push the declarations of builtin types into the namespace.
2968 RID_INDEX is the index of the builtin type in the array
2969 RID_POINTERS. NAME is the name used when looking up the builtin
2970 type. TYPE is the _TYPE node for the builtin type. */
2973 record_builtin_type (enum rid rid_index,
2977 tree rname = NULL_TREE, tname = NULL_TREE;
2978 tree tdecl = NULL_TREE;
2980 if ((int) rid_index < (int) RID_MAX)
2981 rname = ridpointers[(int) rid_index];
2983 tname = get_identifier (name);
2985 /* The calls to SET_IDENTIFIER_GLOBAL_VALUE below should be
2986 eliminated. Built-in types should not be looked up name; their
2987 names are keywords that the parser can recognize. However, there
2988 is code in c-common.c that uses identifier_global_value to look
2989 up built-in types by name. */
2992 tdecl = build_decl (TYPE_DECL, tname, type);
2993 DECL_ARTIFICIAL (tdecl) = 1;
2994 SET_IDENTIFIER_GLOBAL_VALUE (tname, tdecl);
3000 tdecl = build_decl (TYPE_DECL, rname, type);
3001 DECL_ARTIFICIAL (tdecl) = 1;
3003 SET_IDENTIFIER_GLOBAL_VALUE (rname, tdecl);
3006 if (!TYPE_NAME (type))
3007 TYPE_NAME (type) = tdecl;
3010 debug_hooks->type_decl (tdecl, 0);
3013 /* Record one of the standard Java types.
3014 * Declare it as having the given NAME.
3015 * If SIZE > 0, it is the size of one of the integral types;
3016 * otherwise it is the negative of the size of one of the other types. */
3019 record_builtin_java_type (const char* name, int size)
3023 type = make_signed_type (size);
3024 else if (size > -32)
3025 { /* "__java_char" or ""__java_boolean". */
3026 type = make_unsigned_type (-size);
3027 /*if (size == -1) TREE_SET_CODE (type, BOOLEAN_TYPE);*/
3030 { /* "__java_float" or ""__java_double". */
3031 type = make_node (REAL_TYPE);
3032 TYPE_PRECISION (type) = - size;
3035 record_builtin_type (RID_MAX, name, type);
3036 decl = TYPE_NAME (type);
3038 /* Suppress generate debug symbol entries for these types,
3039 since for normal C++ they are just clutter.
3040 However, push_lang_context undoes this if extern "Java" is seen. */
3041 DECL_IGNORED_P (decl) = 1;
3043 TYPE_FOR_JAVA (type) = 1;
3047 /* Push a type into the namespace so that the back-ends ignore it. */
3050 record_unknown_type (tree type, const char* name)
3052 tree decl = pushdecl (build_decl (TYPE_DECL, get_identifier (name), type));
3053 /* Make sure the "unknown type" typedecl gets ignored for debug info. */
3054 DECL_IGNORED_P (decl) = 1;
3055 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
3056 TYPE_SIZE (type) = TYPE_SIZE (void_type_node);
3057 TYPE_ALIGN (type) = 1;
3058 TYPE_USER_ALIGN (type) = 0;
3059 TYPE_MODE (type) = TYPE_MODE (void_type_node);
3062 /* A string for which we should create an IDENTIFIER_NODE at
3065 typedef struct predefined_identifier
3067 /* The name of the identifier. */
3068 const char *const name;
3069 /* The place where the IDENTIFIER_NODE should be stored. */
3071 /* Nonzero if this is the name of a constructor or destructor. */
3072 const int ctor_or_dtor_p;
3073 } predefined_identifier;
3075 /* Create all the predefined identifiers. */
3078 initialize_predefined_identifiers (void)
3080 const predefined_identifier *pid;
3082 /* A table of identifiers to create at startup. */
3083 static const predefined_identifier predefined_identifiers[] = {
3084 { "C++", &lang_name_cplusplus, 0 },
3085 { "C", &lang_name_c, 0 },
3086 { "Java", &lang_name_java, 0 },
3087 /* Some of these names have a trailing space so that it is
3088 impossible for them to conflict with names written by users. */
3089 { "__ct ", &ctor_identifier, 1 },
3090 { "__base_ctor ", &base_ctor_identifier, 1 },
3091 { "__comp_ctor ", &complete_ctor_identifier, 1 },
3092 { "__dt ", &dtor_identifier, 1 },
3093 { "__comp_dtor ", &complete_dtor_identifier, 1 },
3094 { "__base_dtor ", &base_dtor_identifier, 1 },
3095 { "__deleting_dtor ", &deleting_dtor_identifier, 1 },
3096 { IN_CHARGE_NAME, &in_charge_identifier, 0 },
3097 { "nelts", &nelts_identifier, 0 },
3098 { THIS_NAME, &this_identifier, 0 },
3099 { VTABLE_DELTA_NAME, &delta_identifier, 0 },
3100 { VTABLE_PFN_NAME, &pfn_identifier, 0 },
3101 { "_vptr", &vptr_identifier, 0 },
3102 { "__vtt_parm", &vtt_parm_identifier, 0 },
3103 { "::", &global_scope_name, 0 },
3104 { "std", &std_identifier, 0 },
3108 for (pid = predefined_identifiers; pid->name; ++pid)
3110 *pid->node = get_identifier (pid->name);
3111 if (pid->ctor_or_dtor_p)
3112 IDENTIFIER_CTOR_OR_DTOR_P (*pid->node) = 1;
3116 /* Create the predefined scalar types of C,
3117 and some nodes representing standard constants (0, 1, (void *)0).
3118 Initialize the global binding level.
3119 Make definitions for built-in primitive functions. */
3122 cxx_init_decl_processing (void)
3125 tree void_ftype_ptr;
3127 build_common_tree_nodes (flag_signed_char, false);
3129 /* Create all the identifiers we need. */
3130 initialize_predefined_identifiers ();
3132 /* Create the global variables. */
3133 push_to_top_level ();
3135 current_function_decl = NULL_TREE;
3136 current_binding_level = NULL;
3137 /* Enter the global namespace. */
3138 gcc_assert (global_namespace == NULL_TREE);
3139 global_namespace = build_lang_decl (NAMESPACE_DECL, global_scope_name,
3141 TREE_PUBLIC (global_namespace) = 1;
3142 begin_scope (sk_namespace, global_namespace);
3144 current_lang_name = NULL_TREE;
3146 /* Adjust various flags based on command-line settings. */
3147 if (!flag_permissive)
3148 flag_pedantic_errors = 1;
3149 if (!flag_no_inline)
3151 flag_inline_trees = 1;
3154 if (flag_inline_functions)
3155 flag_inline_trees = 2;
3157 /* Force minimum function alignment if using the least significant
3158 bit of function pointers to store the virtual bit. */
3159 if (TARGET_PTRMEMFUNC_VBIT_LOCATION == ptrmemfunc_vbit_in_pfn
3160 && force_align_functions_log < 1)
3161 force_align_functions_log = 1;
3164 current_lang_name = lang_name_c;
3166 /* Create the `std' namespace. */
3167 push_namespace (std_identifier);
3168 std_node = current_namespace;
3171 c_common_nodes_and_builtins ();
3173 java_byte_type_node = record_builtin_java_type ("__java_byte", 8);
3174 java_short_type_node = record_builtin_java_type ("__java_short", 16);
3175 java_int_type_node = record_builtin_java_type ("__java_int", 32);
3176 java_long_type_node = record_builtin_java_type ("__java_long", 64);
3177 java_float_type_node = record_builtin_java_type ("__java_float", -32);
3178 java_double_type_node = record_builtin_java_type ("__java_double", -64);
3179 java_char_type_node = record_builtin_java_type ("__java_char", -16);
3180 java_boolean_type_node = record_builtin_java_type ("__java_boolean", -1);
3182 integer_two_node = build_int_cst (NULL_TREE, 2);
3183 integer_three_node = build_int_cst (NULL_TREE, 3);
3185 record_builtin_type (RID_BOOL, "bool", boolean_type_node);
3186 truthvalue_type_node = boolean_type_node;
3187 truthvalue_false_node = boolean_false_node;
3188 truthvalue_true_node = boolean_true_node;
3190 empty_except_spec = build_tree_list (NULL_TREE, NULL_TREE);
3193 record_builtin_type (RID_MAX, NULL, string_type_node);
3196 delta_type_node = ptrdiff_type_node;
3197 vtable_index_type = ptrdiff_type_node;
3199 vtt_parm_type = build_pointer_type (const_ptr_type_node);
3200 void_ftype = build_function_type (void_type_node, void_list_node);
3201 void_ftype_ptr = build_function_type (void_type_node,
3202 tree_cons (NULL_TREE,
3206 = build_exception_variant (void_ftype_ptr, empty_except_spec);
3208 /* C++ extensions */
3210 unknown_type_node = make_node (UNKNOWN_TYPE);
3211 record_unknown_type (unknown_type_node, "unknown type");
3213 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
3214 TREE_TYPE (unknown_type_node) = unknown_type_node;
3216 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
3218 TYPE_POINTER_TO (unknown_type_node) = unknown_type_node;
3219 TYPE_REFERENCE_TO (unknown_type_node) = unknown_type_node;
3222 /* Make sure we get a unique function type, so we can give
3223 its pointer type a name. (This wins for gdb.) */
3224 tree vfunc_type = make_node (FUNCTION_TYPE);
3225 TREE_TYPE (vfunc_type) = integer_type_node;
3226 TYPE_ARG_TYPES (vfunc_type) = NULL_TREE;
3227 layout_type (vfunc_type);
3229 vtable_entry_type = build_pointer_type (vfunc_type);
3231 record_builtin_type (RID_MAX, VTBL_PTR_TYPE, vtable_entry_type);
3234 = build_cplus_array_type (vtable_entry_type, NULL_TREE);
3235 layout_type (vtbl_type_node);
3236 vtbl_type_node = build_qualified_type (vtbl_type_node, TYPE_QUAL_CONST);
3237 record_builtin_type (RID_MAX, NULL, vtbl_type_node);
3238 vtbl_ptr_type_node = build_pointer_type (vtable_entry_type);
3239 layout_type (vtbl_ptr_type_node);
3240 record_builtin_type (RID_MAX, NULL, vtbl_ptr_type_node);
3242 push_namespace (get_identifier ("__cxxabiv1"));
3243 abi_node = current_namespace;
3246 global_type_node = make_node (LANG_TYPE);
3247 record_unknown_type (global_type_node, "global type");
3250 current_lang_name = lang_name_cplusplus;
3254 tree bad_alloc_type_node;
3255 tree bad_alloc_decl;
3256 tree newtype, deltype;
3257 tree ptr_ftype_sizetype;
3259 push_namespace (std_identifier);
3260 bad_alloc_id = get_identifier ("bad_alloc");
3261 bad_alloc_type_node = make_aggr_type (RECORD_TYPE);
3262 TYPE_CONTEXT (bad_alloc_type_node) = current_namespace;
3264 = create_implicit_typedef (bad_alloc_id, bad_alloc_type_node);
3265 DECL_CONTEXT (bad_alloc_decl) = current_namespace;
3266 TYPE_STUB_DECL (bad_alloc_type_node) = bad_alloc_decl;
3270 = build_function_type (ptr_type_node,
3271 tree_cons (NULL_TREE,
3274 newtype = build_exception_variant
3275 (ptr_ftype_sizetype, add_exception_specifier
3276 (NULL_TREE, bad_alloc_type_node, -1));
3277 deltype = build_exception_variant (void_ftype_ptr, empty_except_spec);
3278 push_cp_library_fn (NEW_EXPR, newtype);
3279 push_cp_library_fn (VEC_NEW_EXPR, newtype);
3280 global_delete_fndecl = push_cp_library_fn (DELETE_EXPR, deltype);
3281 push_cp_library_fn (VEC_DELETE_EXPR, deltype);
3285 = build_library_fn_ptr ("__cxa_pure_virtual", void_ftype);
3287 /* Perform other language dependent initializations. */
3288 init_class_processing ();
3289 init_rtti_processing ();
3291 if (flag_exceptions)
3292 init_exception_processing ();
3294 if (! supports_one_only ())
3297 make_fname_decl = cp_make_fname_decl;
3298 start_fname_decls ();
3300 /* Show we use EH for cleanups. */
3301 if (flag_exceptions)
3302 using_eh_for_cleanups ();
3305 /* Generate an initializer for a function naming variable from
3306 NAME. NAME may be NULL, to indicate a dependent name. TYPE_P is
3307 filled in with the type of the init. */
3310 cp_fname_init (const char* name, tree *type_p)
3312 tree domain = NULL_TREE;
3314 tree init = NULL_TREE;
3319 length = strlen (name);
3320 domain = build_index_type (size_int (length));
3321 init = build_string (length + 1, name);
3324 type = build_qualified_type (char_type_node, TYPE_QUAL_CONST);
3325 type = build_cplus_array_type (type, domain);
3330 TREE_TYPE (init) = type;
3332 init = error_mark_node;
3337 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give the
3338 decl, NAME is the initialization string and TYPE_DEP indicates whether
3339 NAME depended on the type of the function. We make use of that to detect
3340 __PRETTY_FUNCTION__ inside a template fn. This is being done
3341 lazily at the point of first use, so we mustn't push the decl now. */
3344 cp_make_fname_decl (tree id, int type_dep)
3346 const char *const name = (type_dep && processing_template_decl
3347 ? NULL : fname_as_string (type_dep));
3349 tree init = cp_fname_init (name, &type);
3350 tree decl = build_decl (VAR_DECL, id, type);
3353 free ((char *) name);
3355 /* As we're using pushdecl_with_scope, we must set the context. */
3356 DECL_CONTEXT (decl) = current_function_decl;
3357 DECL_PRETTY_FUNCTION_P (decl) = type_dep;
3359 TREE_STATIC (decl) = 1;
3360 TREE_READONLY (decl) = 1;
3361 DECL_ARTIFICIAL (decl) = 1;
3363 TREE_USED (decl) = 1;
3365 if (current_function_decl)
3367 struct cp_binding_level *b = current_binding_level;
3368 while (b->level_chain->kind != sk_function_parms)
3370 pushdecl_with_scope (decl, b, /*is_friend=*/false);
3371 cp_finish_decl (decl, init, /*init_const_expr_p=*/false, NULL_TREE,
3372 LOOKUP_ONLYCONVERTING);
3375 pushdecl_top_level_and_finish (decl, init);
3381 builtin_function_1 (tree decl, tree context)
3383 tree id = DECL_NAME (decl);
3384 const char *name = IDENTIFIER_POINTER (id);
3386 retrofit_lang_decl (decl);
3388 /* All nesting of C++ functions is lexical; there is never a "static
3389 chain" in the sense of GNU C nested functions. */
3390 DECL_NO_STATIC_CHAIN (decl) = 1;
3392 DECL_ARTIFICIAL (decl) = 1;
3393 SET_OVERLOADED_OPERATOR_CODE (decl, ERROR_MARK);
3394 SET_DECL_LANGUAGE (decl, lang_c);
3395 /* Runtime library routines are, by definition, available in an
3396 external shared object. */
3397 DECL_VISIBILITY (decl) = VISIBILITY_DEFAULT;
3398 DECL_VISIBILITY_SPECIFIED (decl) = 1;
3400 DECL_CONTEXT (decl) = context;
3404 /* A function in the user's namespace should have an explicit
3405 declaration before it is used. Mark the built-in function as
3406 anticipated but not actually declared. */
3407 if (name[0] != '_' || name[1] != '_')
3408 DECL_ANTICIPATED (decl) = 1;
3414 cxx_builtin_function (tree decl)
3416 tree id = DECL_NAME (decl);
3417 const char *name = IDENTIFIER_POINTER (id);
3418 /* All builtins that don't begin with an '_' should additionally
3419 go in the 'std' namespace. */
3422 tree decl2 = copy_node(decl);
3423 push_namespace (std_identifier);
3424 builtin_function_1 (decl2, std_node);
3428 return builtin_function_1 (decl, NULL_TREE);
3431 /* Generate a FUNCTION_DECL with the typical flags for a runtime library
3432 function. Not called directly. */
3435 build_library_fn_1 (tree name, enum tree_code operator_code, tree type)
3437 tree fn = build_lang_decl (FUNCTION_DECL, name, type);
3438 DECL_EXTERNAL (fn) = 1;
3439 TREE_PUBLIC (fn) = 1;
3440 DECL_ARTIFICIAL (fn) = 1;
3441 SET_OVERLOADED_OPERATOR_CODE (fn, operator_code);
3442 SET_DECL_LANGUAGE (fn, lang_c);
3443 /* Runtime library routines are, by definition, available in an
3444 external shared object. */
3445 DECL_VISIBILITY (fn) = VISIBILITY_DEFAULT;
3446 DECL_VISIBILITY_SPECIFIED (fn) = 1;
3450 /* Returns the _DECL for a library function with C linkage.
3451 We assume that such functions never throw; if this is incorrect,
3452 callers should unset TREE_NOTHROW. */
3455 build_library_fn (tree name, tree type)
3457 tree fn = build_library_fn_1 (name, ERROR_MARK, type);
3458 TREE_NOTHROW (fn) = 1;
3462 /* Returns the _DECL for a library function with C++ linkage. */
3465 build_cp_library_fn (tree name, enum tree_code operator_code, tree type)
3467 tree fn = build_library_fn_1 (name, operator_code, type);
3468 TREE_NOTHROW (fn) = TYPE_NOTHROW_P (type);
3469 DECL_CONTEXT (fn) = FROB_CONTEXT (current_namespace);
3470 SET_DECL_LANGUAGE (fn, lang_cplusplus);
3474 /* Like build_library_fn, but takes a C string instead of an
3478 build_library_fn_ptr (const char* name, tree type)
3480 return build_library_fn (get_identifier (name), type);
3483 /* Like build_cp_library_fn, but takes a C string instead of an
3487 build_cp_library_fn_ptr (const char* name, tree type)
3489 return build_cp_library_fn (get_identifier (name), ERROR_MARK, type);
3492 /* Like build_library_fn, but also pushes the function so that we will
3493 be able to find it via IDENTIFIER_GLOBAL_VALUE. */
3496 push_library_fn (tree name, tree type)
3498 tree fn = build_library_fn (name, type);
3499 pushdecl_top_level (fn);
3503 /* Like build_cp_library_fn, but also pushes the function so that it
3504 will be found by normal lookup. */
3507 push_cp_library_fn (enum tree_code operator_code, tree type)
3509 tree fn = build_cp_library_fn (ansi_opname (operator_code),
3516 /* Like push_library_fn, but takes a TREE_LIST of parm types rather than
3520 push_void_library_fn (tree name, tree parmtypes)
3522 tree type = build_function_type (void_type_node, parmtypes);
3523 return push_library_fn (name, type);
3526 /* Like push_library_fn, but also note that this function throws
3527 and does not return. Used for __throw_foo and the like. */
3530 push_throw_library_fn (tree name, tree type)
3532 tree fn = push_library_fn (name, type);
3533 TREE_THIS_VOLATILE (fn) = 1;
3534 TREE_NOTHROW (fn) = 0;
3538 /* When we call finish_struct for an anonymous union, we create
3539 default copy constructors and such. But, an anonymous union
3540 shouldn't have such things; this function undoes the damage to the
3541 anonymous union type T.
3543 (The reason that we create the synthesized methods is that we don't
3544 distinguish `union { int i; }' from `typedef union { int i; } U'.
3545 The first is an anonymous union; the second is just an ordinary
3549 fixup_anonymous_aggr (tree t)
3553 /* Wipe out memory of synthesized methods. */
3554 TYPE_HAS_CONSTRUCTOR (t) = 0;
3555 TYPE_HAS_DEFAULT_CONSTRUCTOR (t) = 0;
3556 TYPE_HAS_INIT_REF (t) = 0;
3557 TYPE_HAS_CONST_INIT_REF (t) = 0;
3558 TYPE_HAS_ASSIGN_REF (t) = 0;
3559 TYPE_HAS_CONST_ASSIGN_REF (t) = 0;
3561 /* Splice the implicitly generated functions out of the TYPE_METHODS
3563 q = &TYPE_METHODS (t);
3566 if (DECL_ARTIFICIAL (*q))
3567 *q = TREE_CHAIN (*q);
3569 q = &TREE_CHAIN (*q);
3572 /* ISO C++ 9.5.3. Anonymous unions may not have function members. */
3573 if (TYPE_METHODS (t))
3574 error ("%Jan anonymous union cannot have function members",
3575 TYPE_MAIN_DECL (t));
3577 /* Anonymous aggregates cannot have fields with ctors, dtors or complex
3578 assignment operators (because they cannot have these methods themselves).
3579 For anonymous unions this is already checked because they are not allowed
3580 in any union, otherwise we have to check it. */
3581 if (TREE_CODE (t) != UNION_TYPE)
3585 for (field = TYPE_FIELDS (t); field; field = TREE_CHAIN (field))
3586 if (TREE_CODE (field) == FIELD_DECL)
3588 type = TREE_TYPE (field);
3589 if (CLASS_TYPE_P (type))
3591 if (TYPE_NEEDS_CONSTRUCTING (type))
3592 error ("member %q+#D with constructor not allowed "
3593 "in anonymous aggregate", field);
3594 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
3595 error ("member %q+#D with destructor not allowed "
3596 "in anonymous aggregate", field);
3597 if (TYPE_HAS_COMPLEX_ASSIGN_REF (type))
3598 error ("member %q+#D with copy assignment operator "
3599 "not allowed in anonymous aggregate", field);
3605 /* Make sure that a declaration with no declarator is well-formed, i.e.
3606 just declares a tagged type or anonymous union.
3608 Returns the type declared; or NULL_TREE if none. */
3611 check_tag_decl (cp_decl_specifier_seq *declspecs)
3613 int saw_friend = declspecs->specs[(int)ds_friend] != 0;
3614 int saw_typedef = declspecs->specs[(int)ds_typedef] != 0;
3615 /* If a class, struct, or enum type is declared by the DECLSPECS
3616 (i.e, if a class-specifier, enum-specifier, or non-typename
3617 elaborated-type-specifier appears in the DECLSPECS),
3618 DECLARED_TYPE is set to the corresponding type. */
3619 tree declared_type = NULL_TREE;
3620 bool error_p = false;
3622 if (declspecs->multiple_types_p)
3623 error ("multiple types in one declaration");
3624 else if (declspecs->redefined_builtin_type)
3626 if (!in_system_header)
3627 pedwarn ("redeclaration of C++ built-in type %qT",
3628 declspecs->redefined_builtin_type);
3633 && TYPE_P (declspecs->type)
3634 && ((TREE_CODE (declspecs->type) != TYPENAME_TYPE
3635 && IS_AGGR_TYPE (declspecs->type))
3636 || TREE_CODE (declspecs->type) == ENUMERAL_TYPE))
3637 declared_type = declspecs->type;
3638 else if (declspecs->type == error_mark_node)
3640 if (declared_type == NULL_TREE && ! saw_friend && !error_p)
3641 pedwarn ("declaration does not declare anything");
3642 /* Check for an anonymous union. */
3643 else if (declared_type && IS_AGGR_TYPE_CODE (TREE_CODE (declared_type))
3644 && TYPE_ANONYMOUS_P (declared_type))
3646 /* 7/3 In a simple-declaration, the optional init-declarator-list
3647 can be omitted only when declaring a class (clause 9) or
3648 enumeration (7.2), that is, when the decl-specifier-seq contains
3649 either a class-specifier, an elaborated-type-specifier with
3650 a class-key (9.1), or an enum-specifier. In these cases and
3651 whenever a class-specifier or enum-specifier is present in the
3652 decl-specifier-seq, the identifiers in these specifiers are among
3653 the names being declared by the declaration (as class-name,
3654 enum-names, or enumerators, depending on the syntax). In such
3655 cases, and except for the declaration of an unnamed bit-field (9.6),
3656 the decl-specifier-seq shall introduce one or more names into the
3657 program, or shall redeclare a name introduced by a previous
3658 declaration. [Example:
3659 enum { }; // ill-formed
3660 typedef class { }; // ill-formed
3664 error ("missing type-name in typedef-declaration");
3667 /* Anonymous unions are objects, so they can have specifiers. */;
3668 SET_ANON_AGGR_TYPE_P (declared_type);
3670 if (TREE_CODE (declared_type) != UNION_TYPE && pedantic
3671 && !in_system_header)
3672 pedwarn ("ISO C++ prohibits anonymous structs");
3677 if (declspecs->specs[(int)ds_inline]
3678 || declspecs->specs[(int)ds_virtual])
3679 error ("%qs can only be specified for functions",
3680 declspecs->specs[(int)ds_inline]
3681 ? "inline" : "virtual");
3683 && (!current_class_type
3684 || current_scope () != current_class_type))
3685 error ("%<friend%> can only be specified inside a class");
3686 else if (declspecs->specs[(int)ds_explicit])
3687 error ("%<explicit%> can only be specified for constructors");
3688 else if (declspecs->storage_class)
3689 error ("a storage class can only be specified for objects "
3691 else if (declspecs->specs[(int)ds_const]
3692 || declspecs->specs[(int)ds_volatile]
3693 || declspecs->specs[(int)ds_restrict]
3694 || declspecs->specs[(int)ds_thread])
3695 error ("qualifiers can only be specified for objects "
3699 return declared_type;
3702 /* Called when a declaration is seen that contains no names to declare.
3703 If its type is a reference to a structure, union or enum inherited
3704 from a containing scope, shadow that tag name for the current scope
3705 with a forward reference.
3706 If its type defines a new named structure or union
3707 or defines an enum, it is valid but we need not do anything here.
3708 Otherwise, it is an error.
3710 C++: may have to grok the declspecs to learn about static,
3711 complain for anonymous unions.
3713 Returns the TYPE declared -- or NULL_TREE if none. */
3716 shadow_tag (cp_decl_specifier_seq *declspecs)
3718 tree t = check_tag_decl (declspecs);
3723 if (declspecs->attributes)
3725 warning (0, "attribute ignored in declaration of %q+#T", t);
3726 warning (0, "attribute for %q+#T must follow the %qs keyword",
3727 t, class_key_or_enum_as_string (t));
3731 if (maybe_process_partial_specialization (t) == error_mark_node)
3734 /* This is where the variables in an anonymous union are
3735 declared. An anonymous union declaration looks like:
3737 because there is no declarator after the union, the parser
3738 sends that declaration here. */
3739 if (ANON_AGGR_TYPE_P (t))
3741 fixup_anonymous_aggr (t);
3743 if (TYPE_FIELDS (t))
3745 tree decl = grokdeclarator (/*declarator=*/NULL,
3746 declspecs, NORMAL, 0, NULL);
3747 finish_anon_union (decl);
3754 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
3757 groktypename (cp_decl_specifier_seq *type_specifiers,
3758 const cp_declarator *declarator)
3762 attrs = type_specifiers->attributes;
3763 type_specifiers->attributes = NULL_TREE;
3764 type = grokdeclarator (declarator, type_specifiers, TYPENAME, 0, &attrs);
3766 cplus_decl_attributes (&type, attrs, 0);
3770 /* Decode a declarator in an ordinary declaration or data definition.
3771 This is called as soon as the type information and variable name
3772 have been parsed, before parsing the initializer if any.
3773 Here we create the ..._DECL node, fill in its type,
3774 and put it on the list of decls for the current context.
3775 The ..._DECL node is returned as the value.
3777 Exception: for arrays where the length is not specified,
3778 the type is left null, to be filled in by `cp_finish_decl'.
3780 Function definitions do not come here; they go to start_function
3781 instead. However, external and forward declarations of functions
3782 do go through here. Structure field declarations are done by
3783 grokfield and not through here. */
3786 start_decl (const cp_declarator *declarator,
3787 cp_decl_specifier_seq *declspecs,
3790 tree prefix_attributes,
3791 tree *pushed_scope_p)
3797 *pushed_scope_p = NULL_TREE;
3799 /* An object declared as __attribute__((deprecated)) suppresses
3800 warnings of uses of other deprecated items. */
3801 if (lookup_attribute ("deprecated", attributes))
3802 deprecated_state = DEPRECATED_SUPPRESS;
3804 attributes = chainon (attributes, prefix_attributes);
3806 decl = grokdeclarator (declarator, declspecs, NORMAL, initialized,
3809 deprecated_state = DEPRECATED_NORMAL;
3811 if (decl == NULL_TREE || TREE_CODE (decl) == VOID_TYPE
3812 || decl == error_mark_node)
3813 return error_mark_node;
3815 type = TREE_TYPE (decl);
3817 context = DECL_CONTEXT (decl);
3821 *pushed_scope_p = push_scope (context);
3823 /* We are only interested in class contexts, later. */
3824 if (TREE_CODE (context) == NAMESPACE_DECL)
3825 context = NULL_TREE;
3829 /* Is it valid for this decl to have an initializer at all?
3830 If not, set INITIALIZED to zero, which will indirectly
3831 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
3832 switch (TREE_CODE (decl))
3835 error ("typedef %qD is initialized (use __typeof__ instead)", decl);
3836 return error_mark_node;
3839 error ("function %q#D is initialized like a variable", decl);
3840 return error_mark_node;
3848 if (! toplevel_bindings_p ()
3849 && DECL_EXTERNAL (decl))
3850 warning (0, "declaration of %q#D has %<extern%> and is initialized",
3852 DECL_EXTERNAL (decl) = 0;
3853 if (toplevel_bindings_p ())
3854 TREE_STATIC (decl) = 1;
3857 /* Set attributes here so if duplicate decl, will have proper attributes. */
3858 cplus_decl_attributes (&decl, attributes, 0);
3860 /* Dllimported symbols cannot be defined. Static data members (which
3861 can be initialized in-class and dllimported) go through grokfield,
3862 not here, so we don't need to exclude those decls when checking for
3864 if (initialized && DECL_DLLIMPORT_P (decl))
3866 error ("definition of %q#D is marked %<dllimport%>", decl);
3867 DECL_DLLIMPORT_P (decl) = 0;
3870 /* If #pragma weak was used, mark the decl weak now. */
3871 maybe_apply_pragma_weak (decl);
3873 if (TREE_CODE (decl) == FUNCTION_DECL
3874 && DECL_DECLARED_INLINE_P (decl)
3875 && DECL_UNINLINABLE (decl)
3876 && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl)))
3877 warning (0, "inline function %q+D given attribute noinline", decl);
3879 if (context && COMPLETE_TYPE_P (complete_type (context)))
3881 if (TREE_CODE (decl) == VAR_DECL)
3883 tree field = lookup_field (context, DECL_NAME (decl), 0, false);
3884 if (field == NULL_TREE || TREE_CODE (field) != VAR_DECL)
3885 error ("%q#D is not a static member of %q#T", decl, context);
3888 if (DECL_CONTEXT (field) != context)
3890 if (!same_type_p (DECL_CONTEXT (field), context))
3891 pedwarn ("ISO C++ does not permit %<%T::%D%> "
3892 "to be defined as %<%T::%D%>",
3893 DECL_CONTEXT (field), DECL_NAME (decl),
3894 context, DECL_NAME (decl));
3895 DECL_CONTEXT (decl) = DECL_CONTEXT (field);
3897 if (processing_specialization
3898 && template_class_depth (context) == 0
3899 && CLASSTYPE_TEMPLATE_SPECIALIZATION (context))
3900 error ("template header not allowed in member definition "
3901 "of explicitly specialized class");
3902 /* Static data member are tricky; an in-class initialization
3903 still doesn't provide a definition, so the in-class
3904 declaration will have DECL_EXTERNAL set, but will have an
3905 initialization. Thus, duplicate_decls won't warn
3906 about this situation, and so we check here. */
3907 if (initialized && DECL_INITIALIZED_IN_CLASS_P (field))
3908 error ("duplicate initialization of %qD", decl);
3909 if (duplicate_decls (decl, field, /*newdecl_is_friend=*/false))
3915 tree field = check_classfn (context, decl,
3916 (processing_template_decl
3917 > template_class_depth (context))
3918 ? current_template_parms
3920 if (field && duplicate_decls (decl, field,
3921 /*newdecl_is_friend=*/false))
3925 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
3926 DECL_IN_AGGR_P (decl) = 0;
3927 /* Do not mark DECL as an explicit specialization if it was not
3928 already marked as an instantiation; a declaration should
3929 never be marked as a specialization unless we know what
3930 template is being specialized. */
3931 if (DECL_LANG_SPECIFIC (decl) && DECL_USE_TEMPLATE (decl))
3933 SET_DECL_TEMPLATE_SPECIALIZATION (decl);
3935 /* [temp.expl.spec] An explicit specialization of a static data
3936 member of a template is a definition if the declaration
3937 includes an initializer; otherwise, it is a declaration.
3939 We check for processing_specialization so this only applies
3940 to the new specialization syntax. */
3941 if (!initialized && processing_specialization)
3942 DECL_EXTERNAL (decl) = 1;
3945 if (DECL_EXTERNAL (decl) && ! DECL_TEMPLATE_SPECIALIZATION (decl))
3946 pedwarn ("declaration of %q#D outside of class is not definition",
3950 /* Enter this declaration into the symbol table. */
3951 tem = maybe_push_decl (decl);
3953 if (processing_template_decl)
3954 tem = push_template_decl (tem);
3955 if (tem == error_mark_node)
3956 return error_mark_node;
3958 /* Tell the back-end to use or not use .common as appropriate. If we say
3959 -fconserve-space, we want this to save .data space, at the expense of
3960 wrong semantics. If we say -fno-conserve-space, we want this to
3961 produce errors about redefs; to do this we force variables into the
3963 if (flag_conserve_space
3964 && TREE_CODE (tem) == VAR_DECL
3965 && TREE_PUBLIC (tem)
3966 && !DECL_THREAD_LOCAL_P (tem)
3967 && !have_global_bss_p ())
3968 DECL_COMMON (tem) = 1;
3970 if (!processing_template_decl && TREE_CODE (tem) == VAR_DECL)
3971 start_decl_1 (tem, initialized);
3977 start_decl_1 (tree decl, bool initialized)
3981 gcc_assert (!processing_template_decl);
3983 if (error_operand_p (decl))
3986 gcc_assert (TREE_CODE (decl) == VAR_DECL);
3987 type = TREE_TYPE (decl);
3990 /* Is it valid for this decl to have an initializer at all?
3991 If not, set INITIALIZED to zero, which will indirectly
3992 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
3994 /* Don't allow initializations for incomplete types except for
3995 arrays which might be completed by the initialization. */
3996 if (COMPLETE_TYPE_P (complete_type (type)))
3997 ; /* A complete type is ok. */
3998 else if (TREE_CODE (type) != ARRAY_TYPE)
4000 error ("variable %q#D has initializer but incomplete type", decl);
4002 type = TREE_TYPE (decl) = error_mark_node;
4004 else if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (type))))
4006 if (DECL_LANG_SPECIFIC (decl) && DECL_TEMPLATE_INFO (decl))
4007 error ("elements of array %q#D have incomplete type", decl);
4008 /* else we already gave an error in start_decl. */
4012 else if (IS_AGGR_TYPE (type)
4013 && ! DECL_EXTERNAL (decl))
4015 if (!COMPLETE_TYPE_P (complete_type (type)))
4017 error ("aggregate %q#D has incomplete type and cannot be defined",
4019 /* Change the type so that assemble_variable will give
4020 DECL an rtl we can live with: (mem (const_int 0)). */
4021 type = TREE_TYPE (decl) = error_mark_node;
4025 /* If any base type in the hierarchy of TYPE needs a constructor,
4026 then we set initialized to 1. This way any nodes which are
4027 created for the purposes of initializing this aggregate
4028 will live as long as it does. This is necessary for global
4029 aggregates which do not have their initializers processed until
4030 the end of the file. */
4031 initialized = TYPE_NEEDS_CONSTRUCTING (type);
4035 /* Create a new scope to hold this declaration if necessary.
4036 Whether or not a new scope is necessary cannot be determined
4037 until after the type has been completed; if the type is a
4038 specialization of a class template it is not until after
4039 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
4040 will be set correctly. */
4041 maybe_push_cleanup_level (type);
4044 /* Handle initialization of references. DECL, TYPE, and INIT have the
4045 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
4046 but will be set to a new CLEANUP_STMT if a temporary is created
4047 that must be destroyed subsequently.
4049 Returns an initializer expression to use to initialize DECL, or
4050 NULL if the initialization can be performed statically.
4052 Quotes on semantics can be found in ARM 8.4.3. */
4055 grok_reference_init (tree decl, tree type, tree init, tree *cleanup)
4059 if (init == NULL_TREE)
4061 if ((DECL_LANG_SPECIFIC (decl) == 0
4062 || DECL_IN_AGGR_P (decl) == 0)
4063 && ! DECL_THIS_EXTERN (decl))
4064 error ("%qD declared as reference but not initialized", decl);
4068 if (TREE_CODE (init) == CONSTRUCTOR)
4070 error ("ISO C++ forbids use of initializer list to "
4071 "initialize reference %qD", decl);
4075 if (TREE_CODE (init) == TREE_LIST)
4076 init = build_x_compound_expr_from_list (init, "initializer");
4078 if (TREE_CODE (TREE_TYPE (type)) != ARRAY_TYPE
4079 && TREE_CODE (TREE_TYPE (init)) == ARRAY_TYPE)
4080 /* Note: default conversion is only called in very special cases. */
4081 init = decay_conversion (init);
4083 /* Convert INIT to the reference type TYPE. This may involve the
4084 creation of a temporary, whose lifetime must be the same as that
4085 of the reference. If so, a DECL_EXPR for the temporary will be
4086 added just after the DECL_EXPR for DECL. That's why we don't set
4087 DECL_INITIAL for local references (instead assigning to them
4088 explicitly); we need to allow the temporary to be initialized
4090 tmp = initialize_reference (type, init, decl, cleanup);
4092 if (tmp == error_mark_node)
4094 else if (tmp == NULL_TREE)
4096 error ("cannot initialize %qT from %qT", type, TREE_TYPE (init));
4100 if (TREE_STATIC (decl) && !TREE_CONSTANT (tmp))
4103 DECL_INITIAL (decl) = tmp;
4108 /* Designated initializers in arrays are not supported in GNU C++.
4109 The parser cannot detect this error since it does not know whether
4110 a given brace-enclosed initializer is for a class type or for an
4111 array. This function checks that CE does not use a designated
4112 initializer. If it does, an error is issued. Returns true if CE
4113 is valid, i.e., does not have a designated initializer. */
4116 check_array_designated_initializer (const constructor_elt *ce)
4118 /* Designated initializers for array elements are not supported. */
4121 /* The parser only allows identifiers as designated
4123 gcc_assert (TREE_CODE (ce->index) == IDENTIFIER_NODE);
4124 error ("name %qD used in a GNU-style designated "
4125 "initializer for an array", ce->index);
4132 /* When parsing `int a[] = {1, 2};' we don't know the size of the
4133 array until we finish parsing the initializer. If that's the
4134 situation we're in, update DECL accordingly. */
4137 maybe_deduce_size_from_array_init (tree decl, tree init)
4139 tree type = TREE_TYPE (decl);
4141 if (TREE_CODE (type) == ARRAY_TYPE
4142 && TYPE_DOMAIN (type) == NULL_TREE
4143 && TREE_CODE (decl) != TYPE_DECL)
4145 /* do_default is really a C-ism to deal with tentative definitions.
4146 But let's leave it here to ease the eventual merge. */
4147 int do_default = !DECL_EXTERNAL (decl);
4148 tree initializer = init ? init : DECL_INITIAL (decl);
4151 /* Check that there are no designated initializers in INIT, as
4152 those are not supported in GNU C++, and as the middle-end
4153 will crash if presented with a non-numeric designated
4155 if (initializer && TREE_CODE (initializer) == CONSTRUCTOR)
4157 VEC(constructor_elt,gc) *v = CONSTRUCTOR_ELTS (initializer);
4158 constructor_elt *ce;
4161 VEC_iterate (constructor_elt, v, i, ce);
4163 if (!check_array_designated_initializer (ce))
4169 failure = cp_complete_array_type (&TREE_TYPE (decl), initializer,
4173 error ("initializer fails to determine size of %qD", decl);
4174 TREE_TYPE (decl) = error_mark_node;
4176 else if (failure == 2)
4180 error ("array size missing in %qD", decl);
4181 TREE_TYPE (decl) = error_mark_node;
4183 /* If a `static' var's size isn't known, make it extern as
4184 well as static, so it does not get allocated. If it's not
4185 `static', then don't mark it extern; finish_incomplete_decl
4186 will give it a default size and it will get allocated. */
4187 else if (!pedantic && TREE_STATIC (decl) && !TREE_PUBLIC (decl))
4188 DECL_EXTERNAL (decl) = 1;
4190 else if (failure == 3)
4192 error ("zero-size array %qD", decl);
4193 TREE_TYPE (decl) = error_mark_node;
4197 cp_apply_type_quals_to_decl (cp_type_quals (TREE_TYPE (decl)), decl);
4199 layout_decl (decl, 0);
4203 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
4204 any appropriate error messages regarding the layout. */
4207 layout_var_decl (tree decl)
4211 type = TREE_TYPE (decl);
4212 if (type == error_mark_node)
4215 /* If we haven't already layed out this declaration, do so now.
4216 Note that we must not call complete type for an external object
4217 because it's type might involve templates that we are not
4218 supposed to instantiate yet. (And it's perfectly valid to say
4219 `extern X x' for some incomplete type `X'.) */
4220 if (!DECL_EXTERNAL (decl))
4221 complete_type (type);
4222 if (!DECL_SIZE (decl)
4223 && TREE_TYPE (decl) != error_mark_node
4224 && (COMPLETE_TYPE_P (type)
4225 || (TREE_CODE (type) == ARRAY_TYPE
4226 && !TYPE_DOMAIN (type)
4227 && COMPLETE_TYPE_P (TREE_TYPE (type)))))
4228 layout_decl (decl, 0);
4230 if (!DECL_EXTERNAL (decl) && DECL_SIZE (decl) == NULL_TREE)
4232 /* An automatic variable with an incomplete type: that is an error.
4233 Don't talk about array types here, since we took care of that
4234 message in grokdeclarator. */
4235 error ("storage size of %qD isn't known", decl);
4236 TREE_TYPE (decl) = error_mark_node;
4239 /* Keep this code around in case we later want to control debug info
4240 based on whether a type is "used". (jason 1999-11-11) */
4242 else if (!DECL_EXTERNAL (decl) && IS_AGGR_TYPE (ttype))
4243 /* Let debugger know it should output info for this type. */
4244 note_debug_info_needed (ttype);
4246 if (TREE_STATIC (decl) && DECL_CLASS_SCOPE_P (decl))
4247 note_debug_info_needed (DECL_CONTEXT (decl));
4250 if ((DECL_EXTERNAL (decl) || TREE_STATIC (decl))
4251 && DECL_SIZE (decl) != NULL_TREE
4252 && ! TREE_CONSTANT (DECL_SIZE (decl)))
4254 if (TREE_CODE (DECL_SIZE (decl)) == INTEGER_CST)
4255 constant_expression_warning (DECL_SIZE (decl));
4257 error ("storage size of %qD isn't constant", decl);
4261 /* If a local static variable is declared in an inline function, or if
4262 we have a weak definition, we must endeavor to create only one
4263 instance of the variable at link-time. */
4266 maybe_commonize_var (tree decl)
4268 /* Static data in a function with comdat linkage also has comdat
4270 if (TREE_STATIC (decl)
4271 /* Don't mess with __FUNCTION__. */
4272 && ! DECL_ARTIFICIAL (decl)
4273 && DECL_FUNCTION_SCOPE_P (decl)
4274 /* Unfortunately, import_export_decl has not always been called
4275 before the function is processed, so we cannot simply check
4277 && (DECL_COMDAT (DECL_CONTEXT (decl))
4278 || ((DECL_DECLARED_INLINE_P (DECL_CONTEXT (decl))
4279 || DECL_TEMPLATE_INSTANTIATION (DECL_CONTEXT (decl)))
4280 && TREE_PUBLIC (DECL_CONTEXT (decl)))))
4284 /* With weak symbols, we simply make the variable COMDAT;
4285 that will cause copies in multiple translations units to
4287 comdat_linkage (decl);
4291 if (DECL_INITIAL (decl) == NULL_TREE
4292 || DECL_INITIAL (decl) == error_mark_node)
4294 /* Without weak symbols, we can use COMMON to merge
4295 uninitialized variables. */
4296 TREE_PUBLIC (decl) = 1;
4297 DECL_COMMON (decl) = 1;
4301 /* While for initialized variables, we must use internal
4302 linkage -- which means that multiple copies will not
4304 TREE_PUBLIC (decl) = 0;
4305 DECL_COMMON (decl) = 0;
4306 warning (0, "sorry: semantics of inline function static "
4307 "data %q+#D are wrong (you'll wind up "
4308 "with multiple copies)", decl);
4309 warning (0, "%J you can work around this by removing "
4315 else if (DECL_LANG_SPECIFIC (decl) && DECL_COMDAT (decl))
4316 /* Set it up again; we might have set DECL_INITIAL since the last
4318 comdat_linkage (decl);
4321 /* Issue an error message if DECL is an uninitialized const variable. */
4324 check_for_uninitialized_const_var (tree decl)
4326 tree type = TREE_TYPE (decl);
4328 /* ``Unless explicitly declared extern, a const object does not have
4329 external linkage and must be initialized. ($8.4; $12.1)'' ARM
4331 if (TREE_CODE (decl) == VAR_DECL
4332 && TREE_CODE (type) != REFERENCE_TYPE
4333 && CP_TYPE_CONST_P (type)
4334 && !TYPE_NEEDS_CONSTRUCTING (type)
4335 && !DECL_INITIAL (decl))
4336 error ("uninitialized const %qD", decl);
4340 /* Structure holding the current initializer being processed by reshape_init.
4341 CUR is a pointer to the current element being processed, END is a pointer
4342 after the last element present in the initializer. */
4343 typedef struct reshape_iterator_t
4345 constructor_elt *cur;
4346 constructor_elt *end;
4349 static tree reshape_init_r (tree, reshape_iter *, bool);
4351 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
4352 returned is the next FIELD_DECL (possibly FIELD itself) that can be
4353 initialized. If there are no more such fields, the return value
4357 next_initializable_field (tree field)
4360 && (TREE_CODE (field) != FIELD_DECL
4361 || (DECL_C_BIT_FIELD (field) && !DECL_NAME (field))
4362 || DECL_ARTIFICIAL (field)))
4363 field = TREE_CHAIN (field);
4368 /* Subroutine of reshape_init_array and reshape_init_vector, which does
4369 the actual work. ELT_TYPE is the element type of the array. MAX_INDEX is an
4370 INTEGER_CST representing the size of the array minus one (the maximum index),
4371 or NULL_TREE if the array was declared without specifying the size. D is
4372 the iterator within the constructor. */
4375 reshape_init_array_1 (tree elt_type, tree max_index, reshape_iter *d)
4378 bool sized_array_p = (max_index != NULL_TREE);
4379 unsigned HOST_WIDE_INT max_index_cst = 0;
4380 unsigned HOST_WIDE_INT index;
4382 /* The initializer for an array is always a CONSTRUCTOR. */
4383 new_init = build_constructor (NULL_TREE, NULL);
4387 /* Minus 1 is used for zero sized arrays. */
4388 if (integer_all_onesp (max_index))
4391 if (host_integerp (max_index, 1))
4392 max_index_cst = tree_low_cst (max_index, 1);
4393 /* sizetype is sign extended, not zero extended. */
4395 max_index_cst = tree_low_cst (fold_convert (size_type_node, max_index),
4399 /* Loop until there are no more initializers. */
4401 d->cur != d->end && (!sized_array_p || index <= max_index_cst);
4406 check_array_designated_initializer (d->cur);
4407 elt_init = reshape_init_r (elt_type, d, /*first_initializer_p=*/false);
4408 if (elt_init == error_mark_node)
4409 return error_mark_node;
4410 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init), NULL_TREE, elt_init);
4416 /* Subroutine of reshape_init_r, processes the initializers for arrays.
4417 Parameters are the same of reshape_init_r. */
4420 reshape_init_array (tree type, reshape_iter *d)
4422 tree max_index = NULL_TREE;
4424 gcc_assert (TREE_CODE (type) == ARRAY_TYPE);
4426 if (TYPE_DOMAIN (type))
4427 max_index = array_type_nelts (type);
4429 return reshape_init_array_1 (TREE_TYPE (type), max_index, d);
4432 /* Subroutine of reshape_init_r, processes the initializers for vectors.
4433 Parameters are the same of reshape_init_r. */
4436 reshape_init_vector (tree type, reshape_iter *d)
4438 tree max_index = NULL_TREE;
4441 gcc_assert (TREE_CODE (type) == VECTOR_TYPE);
4443 if (COMPOUND_LITERAL_P (d->cur->value))
4445 tree value = d->cur->value;
4446 if (!same_type_p (TREE_TYPE (value), type))
4448 error ("invalid type %qT as initializer for a vector of type %qT",
4449 TREE_TYPE (d->cur->value), type);
4450 value = error_mark_node;
4456 /* For a vector, the representation type is a struct
4457 containing a single member which is an array of the
4458 appropriate size. */
4459 rtype = TYPE_DEBUG_REPRESENTATION_TYPE (type);
4460 if (rtype && TYPE_DOMAIN (TREE_TYPE (TYPE_FIELDS (rtype))))
4461 max_index = array_type_nelts (TREE_TYPE (TYPE_FIELDS (rtype)));
4463 return reshape_init_array_1 (TREE_TYPE (type), max_index, d);
4466 /* Subroutine of reshape_init_r, processes the initializers for classes
4467 or union. Parameters are the same of reshape_init_r. */
4470 reshape_init_class (tree type, reshape_iter *d, bool first_initializer_p)
4475 gcc_assert (CLASS_TYPE_P (type));
4477 /* The initializer for a class is always a CONSTRUCTOR. */
4478 new_init = build_constructor (NULL_TREE, NULL);
4479 field = next_initializable_field (TYPE_FIELDS (type));
4485 An initializer for an aggregate member that is an
4486 empty class shall have the form of an empty
4487 initializer-list {}. */
4488 if (!first_initializer_p)
4490 error ("initializer for %qT must be brace-enclosed", type);
4491 return error_mark_node;
4496 /* Loop through the initializable fields, gathering initializers. */
4497 while (d->cur != d->end)
4501 /* Handle designated initializers, as an extension. */
4504 field = lookup_field_1 (type, d->cur->index, /*want_type=*/false);
4506 if (!field || TREE_CODE (field) != FIELD_DECL)
4508 error ("%qT has no non-static data member named %qD", type,
4510 return error_mark_node;
4514 /* If we processed all the member of the class, we are done. */
4518 field_init = reshape_init_r (TREE_TYPE (field), d,
4519 /*first_initializer_p=*/false);
4520 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init), field, field_init);
4524 When a union is initialized with a brace-enclosed
4525 initializer, the braces shall only contain an
4526 initializer for the first member of the union. */
4527 if (TREE_CODE (type) == UNION_TYPE)
4530 field = next_initializable_field (TREE_CHAIN (field));
4536 /* Subroutine of reshape_init, which processes a single initializer (part of
4537 a CONSTRUCTOR). TYPE is the type of the variable being initialized, D is the
4538 iterator within the CONSTRUCTOR which points to the initializer to process.
4539 FIRST_INITIALIZER_P is true if this is the first initializer of the
4540 CONSTRUCTOR node. */
4543 reshape_init_r (tree type, reshape_iter *d, bool first_initializer_p)
4545 tree init = d->cur->value;
4547 /* A non-aggregate type is always initialized with a single
4549 if (!CP_AGGREGATE_TYPE_P (type))
4551 /* It is invalid to initialize a non-aggregate type with a
4552 brace-enclosed initializer.
4553 We need to check for BRACE_ENCLOSED_INITIALIZER_P here because
4554 of g++.old-deja/g++.mike/p7626.C: a pointer-to-member constant is
4555 a CONSTRUCTOR (with a record type). */
4556 if (TREE_CODE (init) == CONSTRUCTOR
4557 && BRACE_ENCLOSED_INITIALIZER_P (init)) /* p7626.C */
4559 error ("braces around scalar initializer for type %qT", type);
4560 init = error_mark_node;
4569 All implicit type conversions (clause _conv_) are considered when
4570 initializing the aggregate member with an initializer from an
4571 initializer-list. If the initializer can initialize a member,
4572 the member is initialized. Otherwise, if the member is itself a
4573 non-empty subaggregate, brace elision is assumed and the
4574 initializer is considered for the initialization of the first
4575 member of the subaggregate. */
4576 if (TREE_CODE (init) != CONSTRUCTOR
4577 && can_convert_arg (type, TREE_TYPE (init), init, LOOKUP_NORMAL))
4583 /* [dcl.init.string]
4585 A char array (whether plain char, signed char, or unsigned char)
4586 can be initialized by a string-literal (optionally enclosed in
4587 braces); a wchar_t array can be initialized by a wide
4588 string-literal (optionally enclosed in braces). */
4589 if (TREE_CODE (type) == ARRAY_TYPE
4590 && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type))))
4592 tree str_init = init;
4594 /* Strip one level of braces if and only if they enclose a single
4595 element (as allowed by [dcl.init.string]). */
4596 if (!first_initializer_p
4597 && TREE_CODE (str_init) == CONSTRUCTOR
4598 && VEC_length (constructor_elt, CONSTRUCTOR_ELTS (str_init)) == 1)
4600 str_init = VEC_index (constructor_elt,
4601 CONSTRUCTOR_ELTS (str_init), 0)->value;
4604 /* If it's a string literal, then it's the initializer for the array
4605 as a whole. Otherwise, continue with normal initialization for
4606 array types (one value per array element). */
4607 if (TREE_CODE (str_init) == STRING_CST)
4614 /* The following cases are about aggregates. If we are not within a full
4615 initializer already, and there is not a CONSTRUCTOR, it means that there
4616 is a missing set of braces (that is, we are processing the case for
4617 which reshape_init exists). */
4618 if (!first_initializer_p)
4620 if (TREE_CODE (init) == CONSTRUCTOR)
4622 /* For a nested compound literal, there is no need to reshape since
4623 brace elision is not allowed. Even if we decided to allow it,
4624 we should add a call to reshape_init in finish_compound_literal,
4625 before calling digest_init, so changing this code would still
4626 not be necessary. */
4627 if (!COMPOUND_LITERAL_P (init))
4630 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init));
4631 return reshape_init (type, init);
4634 gcc_assert (!BRACE_ENCLOSED_INITIALIZER_P (init));
4637 warning (OPT_Wmissing_braces, "missing braces around initializer for %qT",
4641 /* Dispatch to specialized routines. */
4642 if (CLASS_TYPE_P (type))
4643 return reshape_init_class (type, d, first_initializer_p);
4644 else if (TREE_CODE (type) == ARRAY_TYPE)
4645 return reshape_init_array (type, d);
4646 else if (TREE_CODE (type) == VECTOR_TYPE)
4647 return reshape_init_vector (type, d);
4652 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
4653 brace-enclosed aggregate initializer.
4655 INIT is the CONSTRUCTOR containing the list of initializers describing
4656 a brace-enclosed initializer for an entity of the indicated aggregate TYPE.
4657 It may not presently match the shape of the TYPE; for example:
4659 struct S { int a; int b; };
4660 struct S a[] = { 1, 2, 3, 4 };
4662 Here INIT will hold a VEC of four elements, rather than a
4663 VEC of two elements, each itself a VEC of two elements. This
4664 routine transforms INIT from the former form into the latter. The
4665 revised CONSTRUCTOR node is returned. */
4668 reshape_init (tree type, tree init)
4670 VEC(constructor_elt, gc) *v;
4674 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init));
4676 v = CONSTRUCTOR_ELTS (init);
4678 /* An empty constructor does not need reshaping, and it is always a valid
4680 if (VEC_empty (constructor_elt, v))
4683 /* Recurse on this CONSTRUCTOR. */
4684 d.cur = VEC_index (constructor_elt, v, 0);
4685 d.end = d.cur + VEC_length (constructor_elt, v);
4687 new_init = reshape_init_r (type, &d, true);
4688 if (new_init == error_mark_node)
4689 return error_mark_node;
4691 /* Make sure all the element of the constructor were used. Otherwise,
4692 issue an error about exceeding initializers. */
4694 error ("too many initializers for %qT", type);
4699 /* Verify INIT (the initializer for DECL), and record the
4700 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
4701 grok_reference_init.
4703 If the return value is non-NULL, it is an expression that must be
4704 evaluated dynamically to initialize DECL. */
4707 check_initializer (tree decl, tree init, int flags, tree *cleanup)
4709 tree type = TREE_TYPE (decl);
4710 tree init_code = NULL;
4712 /* Things that are going to be initialized need to have complete
4714 TREE_TYPE (decl) = type = complete_type (TREE_TYPE (decl));
4716 if (type == error_mark_node)
4717 /* We will have already complained. */
4720 if (TREE_CODE (type) == ARRAY_TYPE)
4722 tree element_type = TREE_TYPE (type);
4724 /* The array type itself need not be complete, because the
4725 initializer may tell us how many elements are in the array.
4726 But, the elements of the array must be complete. */
4727 if (!COMPLETE_TYPE_P (complete_type (element_type)))
4729 error ("elements of array %q#D have incomplete type", decl);
4732 /* It is not valid to initialize an a VLA. */
4734 && ((COMPLETE_TYPE_P (type) && !TREE_CONSTANT (TYPE_SIZE (type)))
4735 || !TREE_CONSTANT (TYPE_SIZE (element_type))))
4737 error ("variable-sized object %qD may not be initialized", decl);
4741 else if (!COMPLETE_TYPE_P (type))
4743 error ("%qD has incomplete type", decl);
4744 TREE_TYPE (decl) = error_mark_node;
4748 /* There is no way to make a variable-sized class type in GNU C++. */
4749 gcc_assert (TREE_CONSTANT (TYPE_SIZE (type)));
4751 if (!CP_AGGREGATE_TYPE_P (type)
4752 && init && BRACE_ENCLOSED_INITIALIZER_P (init)
4753 && VEC_length (constructor_elt, CONSTRUCTOR_ELTS (init)) != 1)
4755 error ("scalar object %qD requires one element in initializer", decl);
4756 TREE_TYPE (decl) = error_mark_node;
4760 if (TREE_CODE (decl) == CONST_DECL)
4762 gcc_assert (TREE_CODE (type) != REFERENCE_TYPE);
4764 DECL_INITIAL (decl) = init;
4766 gcc_assert (init != NULL_TREE);
4769 else if (!DECL_EXTERNAL (decl) && TREE_CODE (type) == REFERENCE_TYPE)
4770 init = grok_reference_init (decl, type, init, cleanup);
4773 /* Do not reshape constructors of vectors (they don't need to be
4775 if (TREE_CODE (init) == CONSTRUCTOR
4776 && !COMPOUND_LITERAL_P (init)
4777 && !TREE_TYPE (init)) /* ptrmemfunc */
4779 init = reshape_init (type, init);
4781 if ((*targetm.vector_opaque_p) (type))
4783 error ("opaque vector types cannot be initialized");
4784 init = error_mark_node;
4788 /* If DECL has an array type without a specific bound, deduce the
4789 array size from the initializer. */
4790 maybe_deduce_size_from_array_init (decl, init);
4791 type = TREE_TYPE (decl);
4792 if (type == error_mark_node)
4795 if (TYPE_HAS_CONSTRUCTOR (type) || TYPE_NEEDS_CONSTRUCTING (type))
4797 if (TREE_CODE (type) == ARRAY_TYPE)
4798 goto initialize_aggr;
4799 else if (TREE_CODE (init) == CONSTRUCTOR)
4801 if (TYPE_NON_AGGREGATE_CLASS (type))
4803 error ("%qD must be initialized by constructor, "
4806 init = error_mark_node;
4809 goto dont_use_constructor;
4813 int saved_stmts_are_full_exprs_p;
4816 saved_stmts_are_full_exprs_p = 0;
4817 if (building_stmt_tree ())
4819 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
4820 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
4822 init = build_aggr_init (decl, init, flags);
4823 if (building_stmt_tree ())
4824 current_stmt_tree ()->stmts_are_full_exprs_p =
4825 saved_stmts_are_full_exprs_p;
4831 dont_use_constructor:
4832 if (TREE_CODE (init) != TREE_VEC)
4834 init_code = store_init_value (decl, init);
4835 if (pedantic && TREE_CODE (type) == ARRAY_TYPE
4836 && DECL_INITIAL (decl)
4837 && TREE_CODE (DECL_INITIAL (decl)) == STRING_CST
4838 && PAREN_STRING_LITERAL_P (DECL_INITIAL (decl)))
4839 warning (0, "array %qD initialized by parenthesized string literal %qE",
4840 decl, DECL_INITIAL (decl));
4845 else if (DECL_EXTERNAL (decl))
4847 else if (TYPE_P (type) && TYPE_NEEDS_CONSTRUCTING (type))
4848 goto initialize_aggr;
4849 else if (IS_AGGR_TYPE (type))
4851 tree core_type = strip_array_types (type);
4853 if (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type))
4854 error ("structure %qD with uninitialized const members", decl);
4855 if (CLASSTYPE_REF_FIELDS_NEED_INIT (core_type))
4856 error ("structure %qD with uninitialized reference members", decl);
4858 check_for_uninitialized_const_var (decl);
4861 check_for_uninitialized_const_var (decl);
4863 if (init && init != error_mark_node)
4864 init_code = build2 (INIT_EXPR, type, decl, init);
4869 /* If DECL is not a local variable, give it RTL. */
4872 make_rtl_for_nonlocal_decl (tree decl, tree init, const char* asmspec)
4874 int toplev = toplevel_bindings_p ();
4876 const char *filename;
4878 /* Set the DECL_ASSEMBLER_NAME for the object. */
4881 /* The `register' keyword, when used together with an
4882 asm-specification, indicates that the variable should be
4883 placed in a particular register. */
4884 if (TREE_CODE (decl) == VAR_DECL && DECL_REGISTER (decl))
4886 set_user_assembler_name (decl, asmspec);
4887 DECL_HARD_REGISTER (decl) = 1;
4891 if (TREE_CODE (decl) == FUNCTION_DECL
4892 && DECL_BUILT_IN_CLASS (decl) == BUILT_IN_NORMAL)
4893 set_builtin_user_assembler_name (decl, asmspec);
4894 set_user_assembler_name (decl, asmspec);
4898 /* Handle non-variables up front. */
4899 if (TREE_CODE (decl) != VAR_DECL)
4901 rest_of_decl_compilation (decl, toplev, at_eof);
4905 /* If we see a class member here, it should be a static data
4907 if (DECL_LANG_SPECIFIC (decl) && DECL_IN_AGGR_P (decl))
4909 gcc_assert (TREE_STATIC (decl));
4910 /* An in-class declaration of a static data member should be
4911 external; it is only a declaration, and not a definition. */
4912 if (init == NULL_TREE)
4913 gcc_assert (DECL_EXTERNAL (decl));
4916 /* We don't create any RTL for local variables. */
4917 if (DECL_FUNCTION_SCOPE_P (decl) && !TREE_STATIC (decl))
4920 /* We defer emission of local statics until the corresponding
4921 DECL_EXPR is expanded. */
4922 defer_p = DECL_FUNCTION_SCOPE_P (decl) || DECL_VIRTUAL_P (decl);
4924 /* We try to defer namespace-scope static constants so that they are
4925 not emitted into the object file unnecessarily. */
4926 filename = input_filename;
4927 if (!DECL_VIRTUAL_P (decl)
4928 && TREE_READONLY (decl)
4929 && DECL_INITIAL (decl) != NULL_TREE
4930 && DECL_INITIAL (decl) != error_mark_node
4932 && ! EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl))
4934 && !TREE_PUBLIC (decl))
4936 /* Fool with the linkage of static consts according to #pragma
4938 struct c_fileinfo *finfo = get_fileinfo (filename);
4939 if (!finfo->interface_unknown && !TREE_PUBLIC (decl))
4941 TREE_PUBLIC (decl) = 1;
4942 DECL_EXTERNAL (decl) = finfo->interface_only;
4947 /* Likewise for template instantiations. */
4948 else if (DECL_LANG_SPECIFIC (decl)
4949 && DECL_IMPLICIT_INSTANTIATION (decl))
4952 /* If we're not deferring, go ahead and assemble the variable. */
4954 rest_of_decl_compilation (decl, toplev, at_eof);
4957 /* Generate code to initialize DECL (a local variable). */
4960 initialize_local_var (tree decl, tree init)
4962 tree type = TREE_TYPE (decl);
4965 gcc_assert (TREE_CODE (decl) == VAR_DECL
4966 || TREE_CODE (decl) == RESULT_DECL);
4967 gcc_assert (!TREE_STATIC (decl));
4969 if (DECL_SIZE (decl) == NULL_TREE)
4971 /* If we used it already as memory, it must stay in memory. */
4972 DECL_INITIAL (decl) = NULL_TREE;
4973 TREE_ADDRESSABLE (decl) = TREE_USED (decl);
4976 if (DECL_SIZE (decl) && type != error_mark_node)
4980 /* Compute and store the initial value. */
4981 already_used = TREE_USED (decl) || TREE_USED (type);
4983 /* Perform the initialization. */
4986 int saved_stmts_are_full_exprs_p;
4988 gcc_assert (building_stmt_tree ());
4989 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
4990 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
4991 finish_expr_stmt (init);
4992 current_stmt_tree ()->stmts_are_full_exprs_p =
4993 saved_stmts_are_full_exprs_p;
4996 /* Set this to 0 so we can tell whether an aggregate which was
4997 initialized was ever used. Don't do this if it has a
4998 destructor, so we don't complain about the 'resource
4999 allocation is initialization' idiom. Now set
5000 attribute((unused)) on types so decls of that type will be
5001 marked used. (see TREE_USED, above.) */
5002 if (TYPE_NEEDS_CONSTRUCTING (type)
5004 && TYPE_HAS_TRIVIAL_DESTRUCTOR (type)
5005 && DECL_NAME (decl))
5006 TREE_USED (decl) = 0;
5007 else if (already_used)
5008 TREE_USED (decl) = 1;
5011 /* Generate a cleanup, if necessary. */
5012 cleanup = cxx_maybe_build_cleanup (decl);
5013 if (DECL_SIZE (decl) && cleanup)
5014 finish_decl_cleanup (decl, cleanup);
5017 /* DECL is a VAR_DECL for a compiler-generated variable with static
5018 storage duration (like a virtual table) whose initializer is a
5019 compile-time constant. INIT must be either a TREE_LIST of values,
5020 or a CONSTRUCTOR. Initialize the variable and provide it to the
5024 initialize_artificial_var (tree decl, tree init)
5026 gcc_assert (DECL_ARTIFICIAL (decl));
5027 if (TREE_CODE (init) == TREE_LIST)
5028 init = build_constructor_from_list (NULL_TREE, init);
5029 gcc_assert (TREE_CODE (init) == CONSTRUCTOR);
5030 DECL_INITIAL (decl) = init;
5031 DECL_INITIALIZED_P (decl) = 1;
5032 determine_visibility (decl);
5033 layout_var_decl (decl);
5034 maybe_commonize_var (decl);
5035 make_rtl_for_nonlocal_decl (decl, init, /*asmspec=*/NULL);
5038 /* Finish processing of a declaration;
5039 install its line number and initial value.
5040 If the length of an array type is not known before,
5041 it must be determined now, from the initial value, or it is an error.
5043 INIT is the initializer (if any) for DECL. If INIT_CONST_EXPR_P is
5044 true, then INIT is an integral constant expression.
5046 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
5047 if the (init) syntax was used. */
5050 cp_finish_decl (tree decl, tree init, bool init_const_expr_p,
5051 tree asmspec_tree, int flags)
5055 const char *asmspec = NULL;
5056 int was_readonly = 0;
5057 bool var_definition_p = false;
5058 int saved_processing_template_decl;
5060 if (decl == error_mark_node)
5065 error ("assignment (not initialization) in declaration");
5069 gcc_assert (TREE_CODE (decl) != RESULT_DECL);
5070 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
5071 gcc_assert (TREE_CODE (decl) != PARM_DECL);
5073 type = TREE_TYPE (decl);
5074 if (type == error_mark_node)
5077 /* Assume no cleanup is required. */
5078 cleanup = NULL_TREE;
5079 saved_processing_template_decl = processing_template_decl;
5081 /* If a name was specified, get the string. */
5082 if (global_scope_p (current_binding_level))
5083 asmspec_tree = maybe_apply_renaming_pragma (decl, asmspec_tree);
5084 if (asmspec_tree && asmspec_tree != error_mark_node)
5085 asmspec = TREE_STRING_POINTER (asmspec_tree);
5087 if (current_class_type
5088 && CP_DECL_CONTEXT (decl) == current_class_type
5089 && TYPE_BEING_DEFINED (current_class_type)
5090 && (DECL_INITIAL (decl) || init))
5091 DECL_INITIALIZED_IN_CLASS_P (decl) = 1;
5093 if (processing_template_decl)
5095 bool type_dependent_p;
5097 /* Add this declaration to the statement-tree. */
5098 if (at_function_scope_p ())
5099 add_decl_expr (decl);
5101 type_dependent_p = dependent_type_p (type);
5103 if (init && init_const_expr_p)
5105 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl) = 1;
5106 if (DECL_INTEGRAL_CONSTANT_VAR_P (decl))
5107 TREE_CONSTANT (decl) = 1;
5111 || !DECL_CLASS_SCOPE_P (decl)
5112 || !DECL_INTEGRAL_CONSTANT_VAR_P (decl)
5114 || value_dependent_expression_p (init)
5115 /* Check also if initializer is a value dependent
5116 { integral_constant_expression }. */
5117 || (TREE_CODE (init) == CONSTRUCTOR
5118 && VEC_length (constructor_elt, CONSTRUCTOR_ELTS (init)) == 1
5119 && value_dependent_expression_p
5120 (VEC_index (constructor_elt,
5121 CONSTRUCTOR_ELTS (init), 0)->value)))
5124 DECL_INITIAL (decl) = init;
5125 if (TREE_CODE (decl) == VAR_DECL
5126 && !DECL_PRETTY_FUNCTION_P (decl)
5127 && !type_dependent_p)
5128 maybe_deduce_size_from_array_init (decl, init);
5132 init = fold_non_dependent_expr (init);
5133 processing_template_decl = 0;
5136 /* Take care of TYPE_DECLs up front. */
5137 if (TREE_CODE (decl) == TYPE_DECL)
5139 if (type != error_mark_node
5140 && IS_AGGR_TYPE (type) && DECL_NAME (decl))
5142 if (TREE_TYPE (DECL_NAME (decl)) && TREE_TYPE (decl) != type)
5143 warning (0, "shadowing previous type declaration of %q#D", decl);
5144 set_identifier_type_value (DECL_NAME (decl), decl);
5147 /* If we have installed this as the canonical typedef for this
5148 type, and that type has not been defined yet, delay emitting
5149 the debug information for it, as we will emit it later. */
5150 if (TYPE_MAIN_DECL (TREE_TYPE (decl)) == decl
5151 && !COMPLETE_TYPE_P (TREE_TYPE (decl)))
5152 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
5154 rest_of_decl_compilation (decl, DECL_CONTEXT (decl) == NULL_TREE,
5159 /* A reference will be modified here, as it is initialized. */
5160 if (! DECL_EXTERNAL (decl)
5161 && TREE_READONLY (decl)
5162 && TREE_CODE (type) == REFERENCE_TYPE)
5165 TREE_READONLY (decl) = 0;
5168 if (TREE_CODE (decl) == VAR_DECL)
5170 /* Only PODs can have thread-local storage. Other types may require
5171 various kinds of non-trivial initialization. */
5172 if (DECL_THREAD_LOCAL_P (decl) && !pod_type_p (TREE_TYPE (decl)))
5173 error ("%qD cannot be thread-local because it has non-POD type %qT",
5174 decl, TREE_TYPE (decl));
5175 /* If this is a local variable that will need a mangled name,
5176 register it now. We must do this before processing the
5177 initializer for the variable, since the initialization might
5178 require a guard variable, and since the mangled name of the
5179 guard variable will depend on the mangled name of this
5181 if (!processing_template_decl
5182 && DECL_FUNCTION_SCOPE_P (decl)
5183 && TREE_STATIC (decl)
5184 && !DECL_ARTIFICIAL (decl))
5185 push_local_name (decl);
5186 /* Convert the initializer to the type of DECL, if we have not
5187 already initialized DECL. */
5188 if (!DECL_INITIALIZED_P (decl)
5189 /* If !DECL_EXTERNAL then DECL is being defined. In the
5190 case of a static data member initialized inside the
5191 class-specifier, there can be an initializer even if DECL
5192 is *not* defined. */
5193 && (!DECL_EXTERNAL (decl) || init))
5197 DECL_NONTRIVIALLY_INITIALIZED_P (decl) = 1;
5198 if (init_const_expr_p)
5200 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl) = 1;
5201 if (DECL_INTEGRAL_CONSTANT_VAR_P (decl))
5202 TREE_CONSTANT (decl) = 1;
5205 init = check_initializer (decl, init, flags, &cleanup);
5206 /* Thread-local storage cannot be dynamically initialized. */
5207 if (DECL_THREAD_LOCAL_P (decl) && init)
5209 error ("%qD is thread-local and so cannot be dynamically "
5210 "initialized", decl);
5214 /* Check that the initializer for a static data member was a
5215 constant. Although we check in the parser that the
5216 initializer is an integral constant expression, we do not
5217 simplify division-by-zero at the point at which it
5218 occurs. Therefore, in:
5220 struct S { static const int i = 7 / 0; };
5222 we issue an error at this point. It would
5223 probably be better to forbid division by zero in
5224 integral constant expressions. */
5225 if (DECL_EXTERNAL (decl) && init)
5227 error ("%qD cannot be initialized by a non-constant expression"
5228 " when being declared", decl);
5229 DECL_INITIALIZED_IN_CLASS_P (decl) = 0;
5237 The memory occupied by any object of static storage
5238 duration is zero-initialized at program startup before
5239 any other initialization takes place.
5241 We cannot create an appropriate initializer until after
5242 the type of DECL is finalized. If DECL_INITIAL is set,
5243 then the DECL is statically initialized, and any
5244 necessary zero-initialization has already been performed. */
5245 if (TREE_STATIC (decl) && !DECL_INITIAL (decl))
5246 DECL_INITIAL (decl) = build_zero_init (TREE_TYPE (decl),
5247 /*nelts=*/NULL_TREE,
5248 /*static_storage_p=*/true);
5249 /* Remember that the initialization for this variable has
5251 DECL_INITIALIZED_P (decl) = 1;
5252 /* This declaration is the definition of this variable,
5253 unless we are initializing a static data member within
5254 the class specifier. */
5255 if (!DECL_EXTERNAL (decl))
5256 var_definition_p = true;
5258 /* If the variable has an array type, lay out the type, even if
5259 there is no initializer. It is valid to index through the
5260 array, and we must get TYPE_ALIGN set correctly on the array
5262 else if (TREE_CODE (type) == ARRAY_TYPE)
5266 /* Add this declaration to the statement-tree. This needs to happen
5267 after the call to check_initializer so that the DECL_EXPR for a
5268 reference temp is added before the DECL_EXPR for the reference itself. */
5269 if (at_function_scope_p ())
5270 add_decl_expr (decl);
5272 /* Let the middle end know about variables and functions -- but not
5273 static data members in uninstantiated class templates. */
5274 if (!saved_processing_template_decl
5275 && (TREE_CODE (decl) == VAR_DECL
5276 || TREE_CODE (decl) == FUNCTION_DECL))
5278 if (TREE_CODE (decl) == VAR_DECL)
5280 layout_var_decl (decl);
5281 maybe_commonize_var (decl);
5282 if (DECL_NAMESPACE_SCOPE_P (decl) && !TREE_PUBLIC (decl)
5283 && !DECL_THIS_STATIC (decl) && !DECL_ARTIFICIAL (decl))
5285 /* This is a const variable with implicit 'static'. Set
5286 DECL_THIS_STATIC so we can tell it from variables that are
5287 !TREE_PUBLIC because of the anonymous namespace. */
5288 DECL_THIS_STATIC (decl) = 1;
5292 make_rtl_for_nonlocal_decl (decl, init, asmspec);
5294 /* Check for abstractness of the type. Notice that there is no
5295 need to strip array types here since the check for those types
5296 is already done within create_array_type_for_decl. */
5297 if (TREE_CODE (type) == FUNCTION_TYPE
5298 || TREE_CODE (type) == METHOD_TYPE)
5299 abstract_virtuals_error (decl, TREE_TYPE (type));
5301 abstract_virtuals_error (decl, type);
5303 /* This needs to happen after the linkage is set. */
5304 determine_visibility (decl);
5306 if (TREE_CODE (decl) == FUNCTION_DECL
5307 || TREE_TYPE (decl) == error_mark_node)
5308 /* No initialization required. */
5310 else if (DECL_EXTERNAL (decl)
5311 && ! (DECL_LANG_SPECIFIC (decl)
5312 && DECL_NOT_REALLY_EXTERN (decl)))
5315 DECL_INITIAL (decl) = init;
5319 /* A variable definition. */
5320 if (DECL_FUNCTION_SCOPE_P (decl))
5322 /* Initialize the local variable. */
5323 if (processing_template_decl)
5324 DECL_INITIAL (decl) = init;
5325 else if (!TREE_STATIC (decl))
5326 initialize_local_var (decl, init);
5329 /* If a variable is defined, and then a subsequent
5330 definition with external linkage is encountered, we will
5331 get here twice for the same variable. We want to avoid
5332 calling expand_static_init more than once. For variables
5333 that are not static data members, we can call
5334 expand_static_init only when we actually process the
5335 initializer. It is not legal to redeclare a static data
5336 member, so this issue does not arise in that case. */
5337 if (var_definition_p && TREE_STATIC (decl))
5338 expand_static_init (decl, init);
5342 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
5343 reference, insert it in the statement-tree now. */
5345 push_cleanup (decl, cleanup, false);
5348 processing_template_decl = saved_processing_template_decl;
5351 TREE_READONLY (decl) = 1;
5353 /* If this was marked 'used', be sure it will be output. */
5354 if (lookup_attribute ("used", DECL_ATTRIBUTES (decl)))
5355 mark_decl_referenced (decl);
5358 /* This is here for a midend callback from c-common.c. */
5361 finish_decl (tree decl, tree init, tree asmspec_tree)
5363 cp_finish_decl (decl, init, /*init_const_expr_p=*/false, asmspec_tree, 0);
5366 /* Returns a declaration for a VAR_DECL as if:
5368 extern "C" TYPE NAME;
5370 had been seen. Used to create compiler-generated global
5374 declare_global_var (tree name, tree type)
5378 push_to_top_level ();
5379 decl = build_decl (VAR_DECL, name, type);
5380 TREE_PUBLIC (decl) = 1;
5381 DECL_EXTERNAL (decl) = 1;
5382 DECL_ARTIFICIAL (decl) = 1;
5383 /* If the user has explicitly declared this variable (perhaps
5384 because the code we are compiling is part of a low-level runtime
5385 library), then it is possible that our declaration will be merged
5386 with theirs by pushdecl. */
5387 decl = pushdecl (decl);
5388 finish_decl (decl, NULL_TREE, NULL_TREE);
5389 pop_from_top_level ();
5394 /* Returns a pointer to the `atexit' function. Note that if
5395 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
5396 `__cxa_atexit' function specified in the IA64 C++ ABI. */
5399 get_atexit_node (void)
5406 bool use_aeabi_atexit;
5411 if (flag_use_cxa_atexit && !targetm.cxx.use_atexit_for_cxa_atexit ())
5413 /* The declaration for `__cxa_atexit' is:
5415 int __cxa_atexit (void (*)(void *), void *, void *)
5417 We build up the argument types and then then function type
5420 use_aeabi_atexit = targetm.cxx.use_aeabi_atexit ();
5421 /* First, build the pointer-to-function type for the first
5423 arg_types = tree_cons (NULL_TREE, ptr_type_node, void_list_node);
5424 fn_type = build_function_type (void_type_node, arg_types);
5425 fn_ptr_type = build_pointer_type (fn_type);
5426 /* Then, build the rest of the argument types. */
5427 arg_types = tree_cons (NULL_TREE, ptr_type_node, void_list_node);
5428 if (use_aeabi_atexit)
5430 arg_types = tree_cons (NULL_TREE, fn_ptr_type, arg_types);
5431 arg_types = tree_cons (NULL_TREE, ptr_type_node, arg_types);
5435 arg_types = tree_cons (NULL_TREE, ptr_type_node, arg_types);
5436 arg_types = tree_cons (NULL_TREE, fn_ptr_type, arg_types);
5438 /* And the final __cxa_atexit type. */
5439 fn_type = build_function_type (integer_type_node, arg_types);
5440 fn_ptr_type = build_pointer_type (fn_type);
5441 if (use_aeabi_atexit)
5442 name = "__aeabi_atexit";
5444 name = "__cxa_atexit";
5448 /* The declaration for `atexit' is:
5450 int atexit (void (*)());
5452 We build up the argument types and then then function type
5454 fn_type = build_function_type (void_type_node, void_list_node);
5455 fn_ptr_type = build_pointer_type (fn_type);
5456 arg_types = tree_cons (NULL_TREE, fn_ptr_type, void_list_node);
5457 /* Build the final atexit type. */
5458 fn_type = build_function_type (integer_type_node, arg_types);
5462 /* Now, build the function declaration. */
5463 push_lang_context (lang_name_c);
5464 atexit_fndecl = build_library_fn_ptr (name, fn_type);
5465 mark_used (atexit_fndecl);
5466 pop_lang_context ();
5467 atexit_node = decay_conversion (atexit_fndecl);
5472 /* Returns the __dso_handle VAR_DECL. */
5475 get_dso_handle_node (void)
5477 if (dso_handle_node)
5478 return dso_handle_node;
5480 /* Declare the variable. */
5481 dso_handle_node = declare_global_var (get_identifier ("__dso_handle"),
5484 return dso_handle_node;
5487 /* Begin a new function with internal linkage whose job will be simply
5488 to destroy some particular variable. */
5490 static GTY(()) int start_cleanup_cnt;
5493 start_cleanup_fn (void)
5499 bool use_cxa_atexit = flag_use_cxa_atexit
5500 && !targetm.cxx.use_atexit_for_cxa_atexit ();
5502 push_to_top_level ();
5504 /* No need to mangle this. */
5505 push_lang_context (lang_name_c);
5507 /* Build the parameter-types. */
5508 parmtypes = void_list_node;
5509 /* Functions passed to __cxa_atexit take an additional parameter.
5510 We'll just ignore it. After we implement the new calling
5511 convention for destructors, we can eliminate the use of
5512 additional cleanup functions entirely in the -fnew-abi case. */
5514 parmtypes = tree_cons (NULL_TREE, ptr_type_node, parmtypes);
5515 /* Build the function type itself. */
5516 fntype = build_function_type (void_type_node, parmtypes);
5517 /* Build the name of the function. */
5518 sprintf (name, "__tcf_%d", start_cleanup_cnt++);
5519 /* Build the function declaration. */
5520 fndecl = build_lang_decl (FUNCTION_DECL, get_identifier (name), fntype);
5521 /* It's a function with internal linkage, generated by the
5523 TREE_PUBLIC (fndecl) = 0;
5524 DECL_ARTIFICIAL (fndecl) = 1;
5525 /* Make the function `inline' so that it is only emitted if it is
5526 actually needed. It is unlikely that it will be inlined, since
5527 it is only called via a function pointer, but we avoid unnecessary
5528 emissions this way. */
5529 DECL_INLINE (fndecl) = 1;
5530 DECL_DECLARED_INLINE_P (fndecl) = 1;
5531 DECL_INTERFACE_KNOWN (fndecl) = 1;
5532 /* Build the parameter. */
5537 parmdecl = cp_build_parm_decl (NULL_TREE, ptr_type_node);
5538 DECL_CONTEXT (parmdecl) = fndecl;
5539 TREE_USED (parmdecl) = 1;
5540 DECL_ARGUMENTS (fndecl) = parmdecl;
5544 start_preparsed_function (fndecl, NULL_TREE, SF_PRE_PARSED);
5546 pop_lang_context ();
5548 return current_function_decl;
5551 /* Finish the cleanup function begun by start_cleanup_fn. */
5554 end_cleanup_fn (void)
5556 expand_or_defer_fn (finish_function (0));
5558 pop_from_top_level ();
5561 /* Generate code to handle the destruction of DECL, an object with
5562 static storage duration. */
5565 register_dtor_fn (tree decl)
5572 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
5573 return void_zero_node;
5575 /* Call build_cleanup before we enter the anonymous function so that
5576 any access checks will be done relative to the current scope,
5577 rather than the scope of the anonymous function. */
5578 build_cleanup (decl);
5580 /* Now start the function. */
5581 cleanup = start_cleanup_fn ();
5583 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
5584 to the original function, rather than the anonymous one. That
5585 will make the back-end think that nested functions are in use,
5586 which causes confusion. */
5588 push_deferring_access_checks (dk_no_check);
5589 fcall = build_cleanup (decl);
5590 pop_deferring_access_checks ();
5592 /* Create the body of the anonymous function. */
5593 compound_stmt = begin_compound_stmt (BCS_FN_BODY);
5594 finish_expr_stmt (fcall);
5595 finish_compound_stmt (compound_stmt);
5598 /* Call atexit with the cleanup function. */
5599 cxx_mark_addressable (cleanup);
5600 mark_used (cleanup);
5601 cleanup = build_unary_op (ADDR_EXPR, cleanup, 0);
5602 if (flag_use_cxa_atexit && !targetm.cxx.use_atexit_for_cxa_atexit ())
5604 args = tree_cons (NULL_TREE,
5605 build_unary_op (ADDR_EXPR, get_dso_handle_node (), 0),
5607 if (targetm.cxx.use_aeabi_atexit ())
5609 args = tree_cons (NULL_TREE, cleanup, args);
5610 args = tree_cons (NULL_TREE, null_pointer_node, args);
5614 args = tree_cons (NULL_TREE, null_pointer_node, args);
5615 args = tree_cons (NULL_TREE, cleanup, args);
5619 args = tree_cons (NULL_TREE, cleanup, NULL_TREE);
5620 return build_function_call (get_atexit_node (), args);
5623 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
5624 is its initializer. Generate code to handle the construction
5625 and destruction of DECL. */
5628 expand_static_init (tree decl, tree init)
5630 gcc_assert (TREE_CODE (decl) == VAR_DECL);
5631 gcc_assert (TREE_STATIC (decl));
5633 /* Some variables require no initialization. */
5635 && !TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl))
5636 && TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
5639 if (DECL_FUNCTION_SCOPE_P (decl))
5641 /* Emit code to perform this initialization but once. */
5642 tree if_stmt = NULL_TREE, inner_if_stmt = NULL_TREE;
5643 tree then_clause = NULL_TREE, inner_then_clause = NULL_TREE;
5644 tree guard, guard_addr, guard_addr_list;
5645 tree acquire_fn, release_fn, abort_fn;
5648 /* Emit code to perform this initialization but once. This code
5651 static <type> guard;
5652 if (!guard.first_byte) {
5653 if (__cxa_guard_acquire (&guard)) {
5656 // Do initialization.
5657 flag = true; __cxa_guard_release (&guard);
5658 // Register variable for destruction at end of program.
5660 if (!flag) __cxa_guard_abort (&guard);
5664 Note that the `flag' variable is only set to 1 *after* the
5665 initialization is complete. This ensures that an exception,
5666 thrown during the construction, will cause the variable to
5667 reinitialized when we pass through this code again, as per:
5671 If the initialization exits by throwing an exception, the
5672 initialization is not complete, so it will be tried again
5673 the next time control enters the declaration.
5675 This process should be thread-safe, too; multiple threads
5676 should not be able to initialize the variable more than
5679 /* Create the guard variable. */
5680 guard = get_guard (decl);
5682 /* This optimization isn't safe on targets with relaxed memory
5683 consistency. On such targets we force synchronization in
5684 __cxa_guard_acquire. */
5685 if (!targetm.relaxed_ordering || !flag_threadsafe_statics)
5687 /* Begin the conditional initialization. */
5688 if_stmt = begin_if_stmt ();
5689 finish_if_stmt_cond (get_guard_cond (guard), if_stmt);
5690 then_clause = begin_compound_stmt (BCS_NO_SCOPE);
5693 if (flag_threadsafe_statics)
5695 guard_addr = build_address (guard);
5696 guard_addr_list = build_tree_list (NULL_TREE, guard_addr);
5698 acquire_fn = get_identifier ("__cxa_guard_acquire");
5699 release_fn = get_identifier ("__cxa_guard_release");
5700 abort_fn = get_identifier ("__cxa_guard_abort");
5701 if (!get_global_value_if_present (acquire_fn, &acquire_fn))
5703 tree argtypes = tree_cons (NULL_TREE, TREE_TYPE (guard_addr),
5705 tree vfntype = build_function_type (void_type_node, argtypes);
5706 acquire_fn = push_library_fn
5707 (acquire_fn, build_function_type (integer_type_node, argtypes));
5708 release_fn = push_library_fn (release_fn, vfntype);
5709 abort_fn = push_library_fn (abort_fn, vfntype);
5713 release_fn = identifier_global_value (release_fn);
5714 abort_fn = identifier_global_value (abort_fn);
5717 inner_if_stmt = begin_if_stmt ();
5718 finish_if_stmt_cond (build_call (acquire_fn, guard_addr_list),
5721 inner_then_clause = begin_compound_stmt (BCS_NO_SCOPE);
5722 begin = get_target_expr (boolean_false_node);
5723 flag = TARGET_EXPR_SLOT (begin);
5725 TARGET_EXPR_CLEANUP (begin)
5726 = build3 (COND_EXPR, void_type_node, flag,
5728 build_call (abort_fn, guard_addr_list));
5729 CLEANUP_EH_ONLY (begin) = 1;
5731 /* Do the initialization itself. */
5732 init = add_stmt_to_compound (begin, init);
5733 init = add_stmt_to_compound
5734 (init, build2 (MODIFY_EXPR, void_type_node, flag, boolean_true_node));
5735 init = add_stmt_to_compound
5736 (init, build_call (release_fn, guard_addr_list));
5739 init = add_stmt_to_compound (init, set_guard (guard));
5741 /* Use atexit to register a function for destroying this static
5743 init = add_stmt_to_compound (init, register_dtor_fn (decl));
5745 finish_expr_stmt (init);
5747 if (flag_threadsafe_statics)
5749 finish_compound_stmt (inner_then_clause);
5750 finish_then_clause (inner_if_stmt);
5751 finish_if_stmt (inner_if_stmt);
5754 if (!targetm.relaxed_ordering || !flag_threadsafe_statics)
5756 finish_compound_stmt (then_clause);
5757 finish_then_clause (if_stmt);
5758 finish_if_stmt (if_stmt);
5762 static_aggregates = tree_cons (init, decl, static_aggregates);
5766 /* Make TYPE a complete type based on INITIAL_VALUE.
5767 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
5768 2 if there was no information (in which case assume 0 if DO_DEFAULT),
5769 3 if the initializer list is empty (in pedantic mode). */
5772 cp_complete_array_type (tree *ptype, tree initial_value, bool do_default)
5775 tree type, elt_type;
5779 /* An array of character type can be initialized from a
5780 brace-enclosed string constant.
5782 FIXME: this code is duplicated from reshape_init. Probably
5783 we should just call reshape_init here? */
5784 if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (*ptype)))
5785 && TREE_CODE (initial_value) == CONSTRUCTOR
5786 && !VEC_empty (constructor_elt, CONSTRUCTOR_ELTS (initial_value)))
5788 VEC(constructor_elt,gc) *v = CONSTRUCTOR_ELTS (initial_value);
5789 tree value = VEC_index (constructor_elt, v, 0)->value;
5791 if (TREE_CODE (value) == STRING_CST
5792 && VEC_length (constructor_elt, v) == 1)
5793 initial_value = value;
5797 failure = complete_array_type (ptype, initial_value, do_default);
5799 /* We can create the array before the element type is complete, which
5800 means that we didn't have these two bits set in the original type
5801 either. In completing the type, we are expected to propagate these
5802 bits. See also complete_type which does the same thing for arrays
5805 if (TYPE_DOMAIN (type))
5807 elt_type = TREE_TYPE (type);
5808 TYPE_NEEDS_CONSTRUCTING (type) = TYPE_NEEDS_CONSTRUCTING (elt_type);
5809 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type)
5810 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (elt_type);
5816 /* Return zero if something is declared to be a member of type
5817 CTYPE when in the context of CUR_TYPE. STRING is the error
5818 message to print in that case. Otherwise, quietly return 1. */
5821 member_function_or_else (tree ctype, tree cur_type, enum overload_flags flags)
5823 if (ctype && ctype != cur_type)
5825 if (flags == DTOR_FLAG)
5826 error ("destructor for alien class %qT cannot be a member", ctype);
5828 error ("constructor for alien class %qT cannot be a member", ctype);
5834 /* Subroutine of `grokdeclarator'. */
5836 /* Generate errors possibly applicable for a given set of specifiers.
5837 This is for ARM $7.1.2. */
5840 bad_specifiers (tree object,
5849 error ("%qD declared as a %<virtual%> %s", object, type);
5851 error ("%qD declared as an %<inline%> %s", object, type);
5853 error ("%<const%> and %<volatile%> function specifiers on "
5854 "%qD invalid in %s declaration",
5857 error ("%q+D declared as a friend", object);
5859 && (TREE_CODE (object) == TYPE_DECL
5860 || (!TYPE_PTRFN_P (TREE_TYPE (object))
5861 && !TYPE_REFFN_P (TREE_TYPE (object))
5862 && !TYPE_PTRMEMFUNC_P (TREE_TYPE (object)))))
5863 error ("%q+D declared with an exception specification", object);
5866 /* DECL is a member function or static data member and is presently
5867 being defined. Check that the definition is taking place in a
5871 check_class_member_definition_namespace (tree decl)
5873 /* These checks only apply to member functions and static data
5875 gcc_assert (TREE_CODE (decl) == FUNCTION_DECL
5876 || TREE_CODE (decl) == VAR_DECL);
5877 /* We check for problems with specializations in pt.c in
5878 check_specialization_namespace, where we can issue better
5880 if (processing_specialization)
5882 /* There are no restrictions on the placement of
5883 explicit instantiations. */
5884 if (processing_explicit_instantiation)
5888 A member function definition that appears outside of the
5889 class definition shall appear in a namespace scope enclosing
5890 the class definition.
5894 The definition for a static data member shall appear in a
5895 namespace scope enclosing the member's class definition. */
5896 if (!is_ancestor (current_namespace, DECL_CONTEXT (decl)))
5897 pedwarn ("definition of %qD is not in namespace enclosing %qT",
5898 decl, DECL_CONTEXT (decl));
5901 /* Build a PARM_DECL for the "this" parameter. TYPE is the
5902 METHOD_TYPE for a non-static member function; QUALS are the
5903 cv-qualifiers that apply to the function. */
5906 build_this_parm (tree type, cp_cv_quals quals)
5911 cp_cv_quals this_quals;
5913 this_type = TREE_VALUE (TYPE_ARG_TYPES (type));
5914 /* The `this' parameter is implicitly `const'; it cannot be
5916 this_quals = (quals & TYPE_QUAL_RESTRICT) | TYPE_QUAL_CONST;
5917 qual_type = cp_build_qualified_type (this_type, this_quals);
5918 parm = build_artificial_parm (this_identifier, qual_type);
5919 cp_apply_type_quals_to_decl (this_quals, parm);
5923 /* CTYPE is class type, or null if non-class.
5924 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
5926 DECLARATOR is the function's name.
5927 PARMS is a chain of PARM_DECLs for the function.
5928 VIRTUALP is truthvalue of whether the function is virtual or not.
5929 FLAGS are to be passed through to `grokclassfn'.
5930 QUALS are qualifiers indicating whether the function is `const'
5932 RAISES is a list of exceptions that this function can raise.
5933 CHECK is 1 if we must find this method in CTYPE, 0 if we should
5934 not look, and -1 if we should not call `grokclassfn' at all.
5936 SFK is the kind of special function (if any) for the new function.
5938 Returns `NULL_TREE' if something goes wrong, after issuing
5939 applicable error messages. */
5942 grokfndecl (tree ctype,
5946 tree orig_declarator,
5948 enum overload_flags flags,
5955 special_function_kind sfk,
5962 int staticp = ctype && TREE_CODE (type) == FUNCTION_TYPE;
5966 type = build_exception_variant (type, raises);
5968 decl = build_lang_decl (FUNCTION_DECL, declarator, type);
5969 if (TREE_CODE (type) == METHOD_TYPE)
5972 parm = build_this_parm (type, quals);
5973 TREE_CHAIN (parm) = parms;
5976 DECL_ARGUMENTS (decl) = parms;
5977 /* Propagate volatile out from type to decl. */
5978 if (TYPE_VOLATILE (type))
5979 TREE_THIS_VOLATILE (decl) = 1;
5982 && TREE_CODE (orig_declarator) == TEMPLATE_ID_EXPR)
5986 ("defining explicit specialization %qD in friend declaration",
5990 tree fns = TREE_OPERAND (orig_declarator, 0);
5991 tree args = TREE_OPERAND (orig_declarator, 1);
5993 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
5995 /* Something like `template <class T> friend void f<T>()'. */
5996 error ("invalid use of template-id %qD in declaration "
5997 "of primary template",
6003 /* A friend declaration of the form friend void f<>(). Record
6004 the information in the TEMPLATE_ID_EXPR. */
6005 SET_DECL_IMPLICIT_INSTANTIATION (decl);
6007 if (TREE_CODE (fns) == COMPONENT_REF)
6009 /* Due to bison parser ickiness, we will have already looked
6010 up an operator_name or PFUNCNAME within the current class
6011 (see template_id in parse.y). If the current class contains
6012 such a name, we'll get a COMPONENT_REF here. Undo that. */
6014 gcc_assert (TREE_TYPE (TREE_OPERAND (fns, 0))
6015 == current_class_type);
6016 fns = TREE_OPERAND (fns, 1);
6018 gcc_assert (TREE_CODE (fns) == IDENTIFIER_NODE
6019 || TREE_CODE (fns) == OVERLOAD);
6020 DECL_TEMPLATE_INFO (decl) = tree_cons (fns, args, NULL_TREE);
6022 for (t = TYPE_ARG_TYPES (TREE_TYPE (decl)); t; t = TREE_CHAIN (t))
6023 if (TREE_PURPOSE (t)
6024 && TREE_CODE (TREE_PURPOSE (t)) == DEFAULT_ARG)
6026 error ("default arguments are not allowed in declaration "
6027 "of friend template specialization %qD",
6034 error ("%<inline%> is not allowed in declaration of friend "
6035 "template specialization %qD",
6042 /* If this decl has namespace scope, set that up. */
6044 set_decl_namespace (decl, in_namespace, friendp);
6046 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
6048 /* `main' and builtins have implicit 'C' linkage. */
6049 if ((MAIN_NAME_P (declarator)
6050 || (IDENTIFIER_LENGTH (declarator) > 10
6051 && IDENTIFIER_POINTER (declarator)[0] == '_'
6052 && IDENTIFIER_POINTER (declarator)[1] == '_'
6053 && strncmp (IDENTIFIER_POINTER (declarator)+2, "builtin_", 8) == 0))
6054 && current_lang_name == lang_name_cplusplus
6055 && ctype == NULL_TREE
6056 /* NULL_TREE means global namespace. */
6057 && DECL_CONTEXT (decl) == NULL_TREE)
6058 SET_DECL_LANGUAGE (decl, lang_c);
6060 /* Should probably propagate const out from type to decl I bet (mrs). */
6063 DECL_STATIC_FUNCTION_P (decl) = 1;
6064 DECL_CONTEXT (decl) = ctype;
6069 DECL_CONTEXT (decl) = ctype;
6071 check_class_member_definition_namespace (decl);
6074 if (ctype == NULL_TREE && DECL_MAIN_P (decl))
6076 if (processing_template_decl)
6077 error ("cannot declare %<::main%> to be a template");
6079 error ("cannot declare %<::main%> to be inline");
6081 error ("cannot declare %<::main%> to be static");
6086 /* Members of anonymous types and local classes have no linkage; make
6087 them internal. If a typedef is made later, this will be changed. */
6088 if (ctype && (TYPE_ANONYMOUS_P (ctype)
6089 || decl_function_context (TYPE_MAIN_DECL (ctype))))
6094 /* [basic.link]: A name with no linkage (notably, the name of a class
6095 or enumeration declared in a local scope) shall not be used to
6096 declare an entity with linkage.
6098 Only check this for public decls for now. See core 319, 389. */
6099 t = no_linkage_check (TREE_TYPE (decl),
6100 /*relaxed_p=*/false);
6103 if (TYPE_ANONYMOUS_P (t))
6105 if (DECL_EXTERN_C_P (decl))
6106 /* Allow this; it's pretty common in C. */;
6109 pedwarn ("non-local function %q#D uses anonymous type",
6111 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
6112 pedwarn ("%q+#D does not refer to the unqualified "
6113 "type, so it is not used for linkage",
6118 pedwarn ("non-local function %q#D uses local type %qT", decl, t);
6122 TREE_PUBLIC (decl) = publicp;
6125 DECL_INTERFACE_KNOWN (decl) = 1;
6126 DECL_NOT_REALLY_EXTERN (decl) = 1;
6129 /* If the declaration was declared inline, mark it as such. */
6131 DECL_DECLARED_INLINE_P (decl) = 1;
6132 /* We inline functions that are explicitly declared inline, or, when
6133 the user explicitly asks us to, all functions. */
6134 if (DECL_DECLARED_INLINE_P (decl)
6135 || (flag_inline_trees == 2 && !DECL_INLINE (decl) && funcdef_flag))
6136 DECL_INLINE (decl) = 1;
6138 DECL_EXTERNAL (decl) = 1;
6139 if (quals && TREE_CODE (type) == FUNCTION_TYPE)
6142 ? G_("static member function %qD cannot have cv-qualifier")
6143 : G_("non-member function %qD cannot have cv-qualifier"),
6145 quals = TYPE_UNQUALIFIED;
6148 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl))
6149 && !grok_op_properties (decl, /*complain=*/true))
6152 if (ctype && decl_function_context (decl))
6153 DECL_NO_STATIC_CHAIN (decl) = 1;
6156 /* Make the init_value nonzero so pushdecl knows this is not
6157 tentative. error_mark_node is replaced later with the BLOCK. */
6158 DECL_INITIAL (decl) = error_mark_node;
6160 if (TYPE_NOTHROW_P (type) || nothrow_libfn_p (decl))
6161 TREE_NOTHROW (decl) = 1;
6163 /* Caller will do the rest of this. */
6167 if (ctype != NULL_TREE)
6169 if (sfk == sfk_constructor)
6170 DECL_CONSTRUCTOR_P (decl) = 1;
6172 grokclassfn (ctype, decl, flags);
6175 decl = check_explicit_specialization (orig_declarator, decl,
6178 4 * (friendp != 0));
6179 if (decl == error_mark_node)
6184 cplus_decl_attributes (&decl, *attrlist, 0);
6185 *attrlist = NULL_TREE;
6188 /* Check main's type after attributes have been applied. */
6189 if (ctype == NULL_TREE && DECL_MAIN_P (decl))
6191 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl)),
6194 tree oldtypeargs = TYPE_ARG_TYPES (TREE_TYPE (decl));
6196 error ("%<::main%> must return %<int%>");
6197 newtype = build_function_type (integer_type_node, oldtypeargs);
6198 TREE_TYPE (decl) = newtype;
6200 check_main_parameter_types (decl);
6203 if (ctype != NULL_TREE
6204 && (! TYPE_FOR_JAVA (ctype) || check_java_method (decl))
6209 old_decl = check_classfn (ctype, decl,
6210 (processing_template_decl
6211 > template_class_depth (ctype))
6212 ? current_template_parms
6219 if (TREE_CODE (old_decl) == TEMPLATE_DECL)
6220 /* Because grokfndecl is always supposed to return a
6221 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
6222 here. We depend on our callers to figure out that its
6223 really a template that's being returned. */
6224 old_decl = DECL_TEMPLATE_RESULT (old_decl);
6226 if (DECL_STATIC_FUNCTION_P (old_decl)
6227 && TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE)
6228 /* Remove the `this' parm added by grokclassfn.
6229 XXX Isn't this done in start_function, too? */
6230 revert_static_member_fn (decl);
6231 if (DECL_ARTIFICIAL (old_decl))
6232 error ("definition of implicitly-declared %qD", old_decl);
6234 /* Since we've smashed OLD_DECL to its
6235 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
6236 if (TREE_CODE (decl) == TEMPLATE_DECL)
6237 decl = DECL_TEMPLATE_RESULT (decl);
6239 /* Attempt to merge the declarations. This can fail, in
6240 the case of some invalid specialization declarations. */
6241 pushed_scope = push_scope (ctype);
6242 ok = duplicate_decls (decl, old_decl, friendp);
6244 pop_scope (pushed_scope);
6247 error ("no %q#D member function declared in class %qT",
6255 if (DECL_CONSTRUCTOR_P (decl) && !grok_ctor_properties (ctype, decl))
6258 if (ctype == NULL_TREE || check)
6262 DECL_VIRTUAL_P (decl) = 1;
6267 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
6268 the linkage that DECL will receive in the object file. */
6271 set_linkage_for_static_data_member (tree decl)
6273 /* A static data member always has static storage duration and
6274 external linkage. Note that static data members are forbidden in
6275 local classes -- the only situation in which a class has
6276 non-external linkage. */
6277 TREE_PUBLIC (decl) = 1;
6278 TREE_STATIC (decl) = 1;
6279 /* For non-template classes, static data members are always put
6280 out in exactly those files where they are defined, just as
6281 with ordinary namespace-scope variables. */
6282 if (!processing_template_decl)
6283 DECL_INTERFACE_KNOWN (decl) = 1;
6286 /* Create a VAR_DECL named NAME with the indicated TYPE.
6288 If SCOPE is non-NULL, it is the class type or namespace containing
6289 the variable. If SCOPE is NULL, the variable should is created in
6290 the innermost enclosings scope. */
6293 grokvardecl (tree type,
6295 const cp_decl_specifier_seq *declspecs,
6301 tree explicit_scope;
6303 gcc_assert (!name || TREE_CODE (name) == IDENTIFIER_NODE);
6305 /* Compute the scope in which to place the variable, but remember
6306 whether or not that scope was explicitly specified by the user. */
6307 explicit_scope = scope;
6310 /* An explicit "extern" specifier indicates a namespace-scope
6312 if (declspecs->storage_class == sc_extern)
6313 scope = current_namespace;
6314 else if (!at_function_scope_p ())
6315 scope = current_scope ();
6319 && (/* If the variable is a namespace-scope variable declared in a
6320 template, we need DECL_LANG_SPECIFIC. */
6321 (TREE_CODE (scope) == NAMESPACE_DECL && processing_template_decl)
6322 /* Similarly for namespace-scope variables with language linkage
6324 || (TREE_CODE (scope) == NAMESPACE_DECL
6325 && current_lang_name != lang_name_cplusplus)
6326 /* Similarly for static data members. */
6328 decl = build_lang_decl (VAR_DECL, name, type);
6330 decl = build_decl (VAR_DECL, name, type);
6332 if (explicit_scope && TREE_CODE (explicit_scope) == NAMESPACE_DECL)
6333 set_decl_namespace (decl, explicit_scope, 0);
6335 DECL_CONTEXT (decl) = FROB_CONTEXT (scope);
6337 if (declspecs->storage_class == sc_extern)
6339 DECL_THIS_EXTERN (decl) = 1;
6340 DECL_EXTERNAL (decl) = !initialized;
6343 if (DECL_CLASS_SCOPE_P (decl))
6345 set_linkage_for_static_data_member (decl);
6346 /* This function is only called with out-of-class definitions. */
6347 DECL_EXTERNAL (decl) = 0;
6348 check_class_member_definition_namespace (decl);
6350 /* At top level, either `static' or no s.c. makes a definition
6351 (perhaps tentative), and absence of `static' makes it public. */
6352 else if (toplevel_bindings_p ())
6354 TREE_PUBLIC (decl) = (declspecs->storage_class != sc_static
6355 && (DECL_THIS_EXTERN (decl) || ! constp));
6356 TREE_STATIC (decl) = ! DECL_EXTERNAL (decl);
6358 /* Not at top level, only `static' makes a static definition. */
6361 TREE_STATIC (decl) = declspecs->storage_class == sc_static;
6362 TREE_PUBLIC (decl) = DECL_EXTERNAL (decl);
6365 if (declspecs->specs[(int)ds_thread])
6367 if (targetm.have_tls)
6368 DECL_TLS_MODEL (decl) = decl_default_tls_model (decl);
6370 /* A mere warning is sure to result in improper semantics
6371 at runtime. Don't bother to allow this to compile. */
6372 error ("thread-local storage not supported for this target");
6375 if (TREE_PUBLIC (decl))
6377 /* [basic.link]: A name with no linkage (notably, the name of a class
6378 or enumeration declared in a local scope) shall not be used to
6379 declare an entity with linkage.
6381 Only check this for public decls for now. */
6382 tree t = no_linkage_check (TREE_TYPE (decl), /*relaxed_p=*/false);
6385 if (TYPE_ANONYMOUS_P (t))
6387 if (DECL_EXTERN_C_P (decl))
6388 /* Allow this; it's pretty common in C. */
6392 /* DRs 132, 319 and 389 seem to indicate types with
6393 no linkage can only be used to declare extern "C"
6394 entities. Since it's not always an error in the
6395 ISO C++ 90 Standard, we only issue a warning. */
6396 warning (0, "non-local variable %q#D uses anonymous type",
6398 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
6399 warning (0, "%q+#D does not refer to the unqualified "
6400 "type, so it is not used for linkage",
6405 warning (0, "non-local variable %q#D uses local type %qT", decl, t);
6409 DECL_INTERFACE_KNOWN (decl) = 1;
6414 /* Create and return a canonical pointer to member function type, for
6415 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
6418 build_ptrmemfunc_type (tree type)
6422 tree unqualified_variant = NULL_TREE;
6424 if (type == error_mark_node)
6427 /* If a canonical type already exists for this type, use it. We use
6428 this method instead of type_hash_canon, because it only does a
6429 simple equality check on the list of field members. */
6431 if ((t = TYPE_GET_PTRMEMFUNC_TYPE (type)))
6434 /* Make sure that we always have the unqualified pointer-to-member
6436 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
6438 = build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type));
6440 t = make_aggr_type (RECORD_TYPE);
6441 xref_basetypes (t, NULL_TREE);
6443 /* Let the front-end know this is a pointer to member function... */
6444 TYPE_PTRMEMFUNC_FLAG (t) = 1;
6445 /* ... and not really an aggregate. */
6446 SET_IS_AGGR_TYPE (t, 0);
6448 field = build_decl (FIELD_DECL, pfn_identifier, type);
6451 field = build_decl (FIELD_DECL, delta_identifier, delta_type_node);
6452 TREE_CHAIN (field) = fields;
6455 finish_builtin_struct (t, "__ptrmemfunc_type", fields, ptr_type_node);
6457 /* Zap out the name so that the back-end will give us the debugging
6458 information for this anonymous RECORD_TYPE. */
6459 TYPE_NAME (t) = NULL_TREE;
6461 /* If this is not the unqualified form of this pointer-to-member
6462 type, set the TYPE_MAIN_VARIANT for this type to be the
6463 unqualified type. Since they are actually RECORD_TYPEs that are
6464 not variants of each other, we must do this manually. */
6465 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
6467 t = build_qualified_type (t, cp_type_quals (type));
6468 TYPE_MAIN_VARIANT (t) = unqualified_variant;
6469 TYPE_NEXT_VARIANT (t) = TYPE_NEXT_VARIANT (unqualified_variant);
6470 TYPE_NEXT_VARIANT (unqualified_variant) = t;
6473 /* Cache this pointer-to-member type so that we can find it again
6475 TYPE_SET_PTRMEMFUNC_TYPE (type, t);
6477 if (TYPE_STRUCTURAL_EQUALITY_P (type))
6478 SET_TYPE_STRUCTURAL_EQUALITY (t);
6479 else if (TYPE_CANONICAL (type) != type)
6480 TYPE_CANONICAL (t) = build_ptrmemfunc_type (TYPE_CANONICAL (type));
6485 /* Create and return a pointer to data member type. */
6488 build_ptrmem_type (tree class_type, tree member_type)
6490 if (TREE_CODE (member_type) == METHOD_TYPE)
6494 arg_types = TYPE_ARG_TYPES (member_type);
6495 class_type = (cp_build_qualified_type
6497 cp_type_quals (TREE_TYPE (TREE_VALUE (arg_types)))));
6499 = build_method_type_directly (class_type,
6500 TREE_TYPE (member_type),
6501 TREE_CHAIN (arg_types));
6502 return build_ptrmemfunc_type (build_pointer_type (member_type));
6506 gcc_assert (TREE_CODE (member_type) != FUNCTION_TYPE);
6507 return build_offset_type (class_type, member_type);
6511 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
6512 Check to see that the definition is valid. Issue appropriate error
6513 messages. Return 1 if the definition is particularly bad, or 0
6517 check_static_variable_definition (tree decl, tree type)
6519 /* Motion 10 at San Diego: If a static const integral data member is
6520 initialized with an integral constant expression, the initializer
6521 may appear either in the declaration (within the class), or in
6522 the definition, but not both. If it appears in the class, the
6523 member is a member constant. The file-scope definition is always
6525 if (!ARITHMETIC_TYPE_P (type) && TREE_CODE (type) != ENUMERAL_TYPE)
6527 error ("invalid in-class initialization of static data member "
6528 "of non-integral type %qT",
6530 /* If we just return the declaration, crashes will sometimes
6531 occur. We therefore return void_type_node, as if this were a
6532 friend declaration, to cause callers to completely ignore
6533 this declaration. */
6536 else if (!CP_TYPE_CONST_P (type))
6537 error ("ISO C++ forbids in-class initialization of non-const "
6538 "static member %qD",
6540 else if (pedantic && !INTEGRAL_TYPE_P (type))
6541 pedwarn ("ISO C++ forbids initialization of member constant "
6542 "%qD of non-integral type %qT", decl, type);
6547 /* Given the SIZE (i.e., number of elements) in an array, compute an
6548 appropriate index type for the array. If non-NULL, NAME is the
6549 name of the thing being declared. */
6552 compute_array_index_type (tree name, tree size)
6556 tree abi_1_itype = NULL_TREE;
6558 if (error_operand_p (size))
6559 return error_mark_node;
6561 type = TREE_TYPE (size);
6562 /* The array bound must be an integer type. */
6563 if (!dependent_type_p (type) && !INTEGRAL_TYPE_P (type))
6566 error ("size of array %qD has non-integral type %qT", name, type);
6568 error ("size of array has non-integral type %qT", type);
6569 size = integer_one_node;
6570 type = TREE_TYPE (size);
6573 if (value_dependent_expression_p (size))
6575 /* We cannot do any checking for a value-dependent SIZE. Just
6576 build the index type and mark that it requires structural
6578 itype = build_index_type (build_min (MINUS_EXPR, sizetype,
6579 size, integer_one_node));
6580 SET_TYPE_STRUCTURAL_EQUALITY (itype);
6584 if (!abi_version_at_least (2) && processing_template_decl)
6585 /* For abi-1, we handled all instances in templates the same way,
6586 even when they were non-dependent. This effects the manglings
6587 produced. So, we do the normal checking for non-dependent
6588 sizes, but at the end we'll return the same type that abi-1
6589 would have, but with TYPE_CANONICAL set to the "right"
6590 value that the current ABI would provide. */
6591 abi_1_itype = build_index_type (build_min (MINUS_EXPR, sizetype,
6592 size, integer_one_node));
6594 /* The size might be the result of a cast. */
6595 STRIP_TYPE_NOPS (size);
6597 /* It might be a const variable or enumeration constant. */
6598 size = integral_constant_value (size);
6600 /* Normally, the array-bound will be a constant. */
6601 if (TREE_CODE (size) == INTEGER_CST)
6603 /* Check to see if the array bound overflowed. Make that an
6604 error, no matter how generous we're being. */
6605 int old_flag_pedantic_errors = flag_pedantic_errors;
6606 int old_pedantic = pedantic;
6607 pedantic = flag_pedantic_errors = 1;
6608 constant_expression_warning (size);
6609 pedantic = old_pedantic;
6610 flag_pedantic_errors = old_flag_pedantic_errors;
6612 /* An array must have a positive number of elements. */
6613 if (INT_CST_LT (size, integer_zero_node))
6616 error ("size of array %qD is negative", name);
6618 error ("size of array is negative");
6619 size = integer_one_node;
6621 /* As an extension we allow zero-sized arrays. We always allow
6622 them in system headers because glibc uses them. */
6623 else if (integer_zerop (size) && pedantic && !in_system_header)
6626 pedwarn ("ISO C++ forbids zero-size array %qD", name);
6628 pedwarn ("ISO C++ forbids zero-size array");
6631 else if (TREE_CONSTANT (size))
6633 /* `(int) &fn' is not a valid array bound. */
6635 error ("size of array %qD is not an integral constant-expression",
6638 error ("size of array is not an integral constant-expression");
6639 size = integer_one_node;
6644 pedwarn ("ISO C++ forbids variable-size array %qD", name);
6646 pedwarn ("ISO C++ forbids variable-size array");
6649 if (processing_template_decl && !TREE_CONSTANT (size))
6650 /* A variable sized array. */
6651 itype = build_min (MINUS_EXPR, sizetype, size, integer_one_node);
6654 HOST_WIDE_INT saved_processing_template_decl;
6656 /* Compute the index of the largest element in the array. It is
6657 one less than the number of elements in the array. We save
6658 and restore PROCESSING_TEMPLATE_DECL so that computations in
6659 cp_build_binary_op will be appropriately folded. */
6660 saved_processing_template_decl = processing_template_decl;
6661 processing_template_decl = 0;
6662 itype = cp_build_binary_op (MINUS_EXPR,
6663 cp_convert (ssizetype, size),
6664 cp_convert (ssizetype, integer_one_node));
6665 itype = fold (itype);
6666 processing_template_decl = saved_processing_template_decl;
6668 if (!TREE_CONSTANT (itype))
6669 /* A variable sized array. */
6670 itype = variable_size (itype);
6671 /* Make sure that there was no overflow when creating to a signed
6672 index type. (For example, on a 32-bit machine, an array with
6673 size 2^32 - 1 is too big.) */
6674 else if (TREE_CODE (itype) == INTEGER_CST
6675 && TREE_OVERFLOW (itype))
6677 error ("overflow in array dimension");
6678 TREE_OVERFLOW (itype) = 0;
6682 /* Create and return the appropriate index type. */
6685 tree t = build_index_type (itype);
6686 TYPE_CANONICAL (abi_1_itype) = TYPE_CANONICAL (t);
6690 return build_index_type (itype);
6693 /* Returns the scope (if any) in which the entity declared by
6694 DECLARATOR will be located. If the entity was declared with an
6695 unqualified name, NULL_TREE is returned. */
6698 get_scope_of_declarator (const cp_declarator *declarator)
6700 while (declarator && declarator->kind != cdk_id)
6701 declarator = declarator->declarator;
6703 /* If the declarator-id is a SCOPE_REF, the scope in which the
6704 declaration occurs is the first operand. */
6706 && declarator->u.id.qualifying_scope)
6707 return declarator->u.id.qualifying_scope;
6709 /* Otherwise, the declarator is not a qualified name; the entity will
6710 be declared in the current scope. */
6714 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
6715 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
6719 create_array_type_for_decl (tree name, tree type, tree size)
6721 tree itype = NULL_TREE;
6722 const char* error_msg;
6724 /* If things have already gone awry, bail now. */
6725 if (type == error_mark_node || size == error_mark_node)
6726 return error_mark_node;
6728 /* Assume that everything will go OK. */
6731 /* There are some types which cannot be array elements. */
6732 switch (TREE_CODE (type))
6735 error_msg = "array of void";
6739 error_msg = "array of functions";
6742 case REFERENCE_TYPE:
6743 error_msg = "array of references";
6747 error_msg = "array of function members";
6754 /* If something went wrong, issue an error-message and return. */
6758 error ("declaration of %qD as %s", name, error_msg);
6760 error ("creating %s", error_msg);
6762 return error_mark_node;
6767 The constant expressions that specify the bounds of the arrays
6768 can be omitted only for the first member of the sequence. */
6769 if (TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type))
6772 error ("declaration of %qD as multidimensional array must "
6773 "have bounds for all dimensions except the first",
6776 error ("multidimensional array must have bounds for all "
6777 "dimensions except the first");
6779 return error_mark_node;
6782 /* Figure out the index type for the array. */
6784 itype = compute_array_index_type (name, size);
6787 T is called the array element type; this type shall not be [...] an
6788 abstract class type. */
6789 abstract_virtuals_error (name, type);
6791 return build_cplus_array_type (type, itype);
6794 /* Check that it's OK to declare a function with the indicated TYPE.
6795 SFK indicates the kind of special function (if any) that this
6796 function is. OPTYPE is the type given in a conversion operator
6797 declaration, or the class type for a constructor/destructor.
6798 Returns the actual return type of the function; that
6799 may be different than TYPE if an error occurs, or for certain
6800 special functions. */
6803 check_special_function_return_type (special_function_kind sfk,
6809 case sfk_constructor:
6811 error ("return type specification for constructor invalid");
6813 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
6814 type = build_pointer_type (optype);
6816 type = void_type_node;
6819 case sfk_destructor:
6821 error ("return type specification for destructor invalid");
6822 /* We can't use the proper return type here because we run into
6823 problems with ambiguous bases and covariant returns.
6824 Java classes are left unchanged because (void *) isn't a valid
6825 Java type, and we don't want to change the Java ABI. */
6826 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
6827 type = build_pointer_type (void_type_node);
6829 type = void_type_node;
6832 case sfk_conversion:
6833 if (type && !same_type_p (type, optype))
6834 error ("operator %qT declared to return %qT", optype, type);
6836 pedwarn ("return type specified for %<operator %T%>", optype);
6847 /* A variable or data member (whose unqualified name is IDENTIFIER)
6848 has been declared with the indicated TYPE. If the TYPE is not
6849 acceptable, issue an error message and return a type to use for
6850 error-recovery purposes. */
6853 check_var_type (tree identifier, tree type)
6855 if (VOID_TYPE_P (type))
6858 error ("unnamed variable or field declared void");
6859 else if (TREE_CODE (identifier) == IDENTIFIER_NODE)
6861 gcc_assert (!IDENTIFIER_OPNAME_P (identifier));
6862 error ("variable or field %qE declared void", identifier);
6865 error ("variable or field declared void");
6866 type = error_mark_node;
6872 /* Given declspecs and a declarator (abstract or otherwise), determine
6873 the name and type of the object declared and construct a DECL node
6876 DECLSPECS is a chain of tree_list nodes whose value fields
6877 are the storage classes and type specifiers.
6879 DECL_CONTEXT says which syntactic context this declaration is in:
6880 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
6881 FUNCDEF for a function definition. Like NORMAL but a few different
6882 error messages in each case. Return value may be zero meaning
6883 this definition is too screwy to try to parse.
6884 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
6885 handle member functions (which have FIELD context).
6886 Return value may be zero meaning this definition is too screwy to
6888 PARM for a parameter declaration (either within a function prototype
6889 or before a function body). Make a PARM_DECL, or return void_type_node.
6890 CATCHPARM for a parameter declaration before a catch clause.
6891 TYPENAME if for a typename (in a cast or sizeof).
6892 Don't make a DECL node; just return the ..._TYPE node.
6893 FIELD for a struct or union field; make a FIELD_DECL.
6894 BITFIELD for a field with specified width.
6895 INITIALIZED is 1 if the decl has an initializer.
6897 ATTRLIST is a pointer to the list of attributes, which may be NULL
6898 if there are none; *ATTRLIST may be modified if attributes from inside
6899 the declarator should be applied to the declaration.
6901 When this function is called, scoping variables (such as
6902 CURRENT_CLASS_TYPE) should reflect the scope in which the
6903 declaration occurs, not the scope in which the new declaration will
6904 be placed. For example, on:
6908 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
6911 Returns a DECL (if a declarator is present), a TYPE (if there is no
6912 declarator, in cases like "struct S;"), or the ERROR_MARK_NODE if an
6916 grokdeclarator (const cp_declarator *declarator,
6917 const cp_decl_specifier_seq *declspecs,
6918 enum decl_context decl_context,
6922 tree type = NULL_TREE;
6924 int virtualp, explicitp, friendp, inlinep, staticp;
6925 int explicit_int = 0;
6926 int explicit_char = 0;
6927 int defaulted_int = 0;
6928 tree dependent_name = NULL_TREE;
6930 tree typedef_decl = NULL_TREE;
6931 const char *name = NULL;
6932 tree typedef_type = NULL_TREE;
6933 /* True if this declarator is a function definition. */
6934 bool funcdef_flag = false;
6935 cp_declarator_kind innermost_code = cdk_error;
6938 /* See the code below that used this. */
6939 tree decl_attr = NULL_TREE;
6942 /* Keep track of what sort of function is being processed
6943 so that we can warn about default return values, or explicit
6944 return values which do not match prescribed defaults. */
6945 special_function_kind sfk = sfk_none;
6947 tree dname = NULL_TREE;
6948 tree ctor_return_type = NULL_TREE;
6949 enum overload_flags flags = NO_SPECIAL;
6950 /* cv-qualifiers that apply to the declarator, for a declaration of
6951 a member function. */
6952 cp_cv_quals memfn_quals = TYPE_UNQUALIFIED;
6953 /* cv-qualifiers that apply to the type specified by the DECLSPECS. */
6955 tree raises = NULL_TREE;
6956 int template_count = 0;
6957 tree returned_attrs = NULL_TREE;
6958 tree parms = NULL_TREE;
6959 const cp_declarator *id_declarator;
6960 /* The unqualified name of the declarator; either an
6961 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
6962 tree unqualified_id;
6963 /* The class type, if any, in which this entity is located,
6964 or NULL_TREE if none. Note that this value may be different from
6965 the current class type; for example if an attempt is made to declare
6966 "A::f" inside "B", this value will be "A". */
6967 tree ctype = current_class_type;
6968 /* The NAMESPACE_DECL for the namespace in which this entity is
6969 located. If an unqualified name is used to declare the entity,
6970 this value will be NULL_TREE, even if the entity is located at
6972 tree in_namespace = NULL_TREE;
6973 cp_storage_class storage_class;
6974 bool unsigned_p, signed_p, short_p, long_p, thread_p;
6975 bool type_was_error_mark_node = false;
6976 bool set_no_warning = false;
6978 signed_p = declspecs->specs[(int)ds_signed];
6979 unsigned_p = declspecs->specs[(int)ds_unsigned];
6980 short_p = declspecs->specs[(int)ds_short];
6981 long_p = declspecs->specs[(int)ds_long];
6982 longlong = declspecs->specs[(int)ds_long] >= 2;
6983 thread_p = declspecs->specs[(int)ds_thread];
6985 if (decl_context == FUNCDEF)
6986 funcdef_flag = true, decl_context = NORMAL;
6987 else if (decl_context == MEMFUNCDEF)
6988 funcdef_flag = true, decl_context = FIELD;
6989 else if (decl_context == BITFIELD)
6990 bitfield = 1, decl_context = FIELD;
6992 /* Look inside a declarator for the name being declared
6993 and get it as a string, for an error message. */
6994 for (id_declarator = declarator;
6996 id_declarator = id_declarator->declarator)
6998 if (id_declarator->kind != cdk_id)
6999 innermost_code = id_declarator->kind;
7001 switch (id_declarator->kind)
7004 if (id_declarator->declarator
7005 && id_declarator->declarator->kind == cdk_id)
7007 sfk = id_declarator->declarator->u.id.sfk;
7008 if (sfk == sfk_destructor)
7015 tree qualifying_scope = id_declarator->u.id.qualifying_scope;
7016 tree decl = id_declarator->u.id.unqualified_name;
7019 if (qualifying_scope)
7021 if (at_function_scope_p ())
7025 A declarator-id shall not be qualified except
7028 None of the cases are permitted in block
7030 if (qualifying_scope == global_namespace)
7031 error ("invalid use of qualified-name %<::%D%>",
7033 else if (TYPE_P (qualifying_scope))
7034 error ("invalid use of qualified-name %<%T::%D%>",
7035 qualifying_scope, decl);
7037 error ("invalid use of qualified-name %<%D::%D%>",
7038 qualifying_scope, decl);
7039 return error_mark_node;
7041 else if (TYPE_P (qualifying_scope))
7043 ctype = qualifying_scope;
7044 if (innermost_code != cdk_function
7045 && current_class_type
7046 && !UNIQUELY_DERIVED_FROM_P (ctype,
7047 current_class_type))
7049 error ("type %qT is not derived from type %qT",
7050 ctype, current_class_type);
7051 return error_mark_node;
7054 else if (TREE_CODE (qualifying_scope) == NAMESPACE_DECL)
7055 in_namespace = qualifying_scope;
7057 switch (TREE_CODE (decl))
7063 if (innermost_code != cdk_function)
7065 error ("declaration of %qD as non-function", decl);
7066 return error_mark_node;
7068 else if (!qualifying_scope
7069 && !(current_class_type && at_class_scope_p ()))
7071 error ("declaration of %qD as non-member", decl);
7072 return error_mark_node;
7075 type = TREE_OPERAND (decl, 0);
7076 name = IDENTIFIER_POINTER (constructor_name (type));
7081 case TEMPLATE_ID_EXPR:
7083 tree fns = TREE_OPERAND (decl, 0);
7086 if (TREE_CODE (dname) != IDENTIFIER_NODE)
7088 gcc_assert (is_overloaded_fn (dname));
7089 dname = DECL_NAME (get_first_fn (dname));
7094 case IDENTIFIER_NODE:
7095 if (TREE_CODE (decl) == IDENTIFIER_NODE)
7098 if (C_IS_RESERVED_WORD (dname))
7100 error ("declarator-id missing; using reserved word %qD",
7102 name = IDENTIFIER_POINTER (dname);
7104 else if (!IDENTIFIER_TYPENAME_P (dname))
7105 name = IDENTIFIER_POINTER (dname);
7108 gcc_assert (flags == NO_SPECIAL);
7109 flags = TYPENAME_FLAG;
7110 ctor_return_type = TREE_TYPE (dname);
7111 sfk = sfk_conversion;
7112 if (is_typename_at_global_scope (dname))
7113 name = IDENTIFIER_POINTER (dname);
7115 name = "<invalid operator>";
7131 return error_mark_node;
7137 if (id_declarator->kind == cdk_id)
7143 The declarator in a function-definition shall have the form
7144 D1 ( parameter-declaration-clause) ... */
7145 if (funcdef_flag && innermost_code != cdk_function)
7147 error ("function definition does not declare parameters");
7148 return error_mark_node;
7151 if (((dname && IDENTIFIER_OPNAME_P (dname)) || flags == TYPENAME_FLAG)
7152 && innermost_code != cdk_function
7153 && ! (ctype && !declspecs->any_specifiers_p))
7155 error ("declaration of %qD as non-function", dname);
7156 return error_mark_node;
7159 /* Anything declared one level down from the top level
7160 must be one of the parameters of a function
7161 (because the body is at least two levels down). */
7163 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
7164 by not allowing C++ class definitions to specify their parameters
7165 with xdecls (must be spec.d in the parmlist).
7167 Since we now wait to push a class scope until we are sure that
7168 we are in a legitimate method context, we must set oldcname
7169 explicitly (since current_class_name is not yet alive).
7171 We also want to avoid calling this a PARM if it is in a namespace. */
7173 if (decl_context == NORMAL && !toplevel_bindings_p ())
7175 struct cp_binding_level *b = current_binding_level;
7176 current_binding_level = b->level_chain;
7177 if (current_binding_level != 0 && toplevel_bindings_p ())
7178 decl_context = PARM;
7179 current_binding_level = b;
7183 name = decl_context == PARM ? "parameter" : "type name";
7185 /* If there were multiple types specified in the decl-specifier-seq,
7186 issue an error message. */
7187 if (declspecs->multiple_types_p)
7189 error ("two or more data types in declaration of %qs", name);
7190 return error_mark_node;
7193 /* Extract the basic type from the decl-specifier-seq. */
7194 type = declspecs->type;
7195 if (type == error_mark_node)
7198 type_was_error_mark_node = true;
7200 /* If the entire declaration is itself tagged as deprecated then
7201 suppress reports of deprecated items. */
7202 if (type && TREE_DEPRECATED (type)
7203 && deprecated_state != DEPRECATED_SUPPRESS)
7204 warn_deprecated_use (type);
7205 if (type && TREE_CODE (type) == TYPE_DECL)
7207 typedef_decl = type;
7208 type = TREE_TYPE (typedef_decl);
7210 /* No type at all: default to `int', and set DEFAULTED_INT
7211 because it was not a user-defined typedef. */
7212 if (type == NULL_TREE && (signed_p || unsigned_p || long_p || short_p))
7214 /* These imply 'int'. */
7215 type = integer_type_node;
7219 explicit_int = declspecs->explicit_int_p;
7220 explicit_char = declspecs->explicit_char_p;
7223 /* See the code below that used this. */
7225 decl_attr = DECL_ATTRIBUTES (typedef_decl);
7227 typedef_type = type;
7230 if (sfk != sfk_conversion)
7231 ctor_return_type = ctype;
7233 if (sfk != sfk_none)
7234 type = check_special_function_return_type (sfk, type,
7236 else if (type == NULL_TREE)
7242 /* We handle `main' specially here, because 'main () { }' is so
7243 common. With no options, it is allowed. With -Wreturn-type,
7244 it is a warning. It is only an error with -pedantic-errors. */
7245 is_main = (funcdef_flag
7246 && dname && MAIN_NAME_P (dname)
7247 && ctype == NULL_TREE
7248 && in_namespace == NULL_TREE
7249 && current_namespace == global_namespace);
7251 if (type_was_error_mark_node)
7252 /* We've already issued an error, don't complain more. */;
7253 else if (in_system_header || flag_ms_extensions)
7254 /* Allow it, sigh. */;
7255 else if (pedantic || ! is_main)
7256 pedwarn ("ISO C++ forbids declaration of %qs with no type", name);
7257 else if (warn_return_type)
7258 warning (0, "ISO C++ forbids declaration of %qs with no type", name);
7260 type = integer_type_node;
7265 /* Now process the modifiers that were specified
7266 and check for invalid combinations. */
7268 /* Long double is a special combination. */
7269 if (long_p && !longlong && TYPE_MAIN_VARIANT (type) == double_type_node)
7272 type = build_qualified_type (long_double_type_node,
7273 cp_type_quals (type));
7276 /* Check all other uses of type modifiers. */
7278 if (unsigned_p || signed_p || long_p || short_p)
7282 if ((signed_p || unsigned_p) && TREE_CODE (type) != INTEGER_TYPE)
7283 error ("%<signed%> or %<unsigned%> invalid for %qs", name);
7284 else if (signed_p && unsigned_p)
7285 error ("%<signed%> and %<unsigned%> specified together for %qs", name);
7286 else if (longlong && TREE_CODE (type) != INTEGER_TYPE)
7287 error ("%<long long%> invalid for %qs", name);
7288 else if (long_p && TREE_CODE (type) == REAL_TYPE)
7289 error ("%<long%> invalid for %qs", name);
7290 else if (short_p && TREE_CODE (type) == REAL_TYPE)
7291 error ("%<short%> invalid for %qs", name);
7292 else if ((long_p || short_p) && TREE_CODE (type) != INTEGER_TYPE)
7293 error ("%<long%> or %<short%> invalid for %qs", name);
7294 else if ((long_p || short_p) && explicit_char)
7295 error ("%<long%> or %<short%> specified with char for %qs", name);
7296 else if (long_p && short_p)
7297 error ("%<long%> and %<short%> specified together for %qs", name);
7301 if (!explicit_int && !defaulted_int && !explicit_char && pedantic)
7303 pedwarn ("long, short, signed or unsigned used invalidly for %qs",
7305 if (flag_pedantic_errors)
7310 /* Discard the type modifiers if they are invalid. */
7321 /* Decide whether an integer type is signed or not.
7322 Optionally treat bitfields as signed by default. */
7326 It is implementation-defined whether a plain (neither
7327 explicitly signed or unsigned) char, short, int, or long
7328 bit-field is signed or unsigned.
7330 Naturally, we extend this to long long as well. Note that
7331 this does not include wchar_t. */
7332 || (bitfield && !flag_signed_bitfields
7334 /* A typedef for plain `int' without `signed' can be
7335 controlled just like plain `int', but a typedef for
7336 `signed int' cannot be so controlled. */
7338 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl))
7339 && TREE_CODE (type) == INTEGER_TYPE
7340 && !same_type_p (TYPE_MAIN_VARIANT (type), wchar_type_node)))
7343 type = long_long_unsigned_type_node;
7345 type = long_unsigned_type_node;
7347 type = short_unsigned_type_node;
7348 else if (type == char_type_node)
7349 type = unsigned_char_type_node;
7350 else if (typedef_decl)
7351 type = c_common_unsigned_type (type);
7353 type = unsigned_type_node;
7355 else if (signed_p && type == char_type_node)
7356 type = signed_char_type_node;
7358 type = long_long_integer_type_node;
7360 type = long_integer_type_node;
7362 type = short_integer_type_node;
7364 if (declspecs->specs[(int)ds_complex])
7366 if (TREE_CODE (type) != INTEGER_TYPE && TREE_CODE (type) != REAL_TYPE)
7367 error ("complex invalid for %qs", name);
7368 /* If we just have "complex", it is equivalent to
7369 "complex double", but if any modifiers at all are specified it is
7370 the complex form of TYPE. E.g, "complex short" is
7371 "complex short int". */
7373 else if (defaulted_int && ! longlong
7374 && ! (long_p || short_p || signed_p || unsigned_p))
7375 type = complex_double_type_node;
7376 else if (type == integer_type_node)
7377 type = complex_integer_type_node;
7378 else if (type == float_type_node)
7379 type = complex_float_type_node;
7380 else if (type == double_type_node)
7381 type = complex_double_type_node;
7382 else if (type == long_double_type_node)
7383 type = complex_long_double_type_node;
7385 type = build_complex_type (type);
7388 type_quals = TYPE_UNQUALIFIED;
7389 if (declspecs->specs[(int)ds_const])
7390 type_quals |= TYPE_QUAL_CONST;
7391 if (declspecs->specs[(int)ds_volatile])
7392 type_quals |= TYPE_QUAL_VOLATILE;
7393 if (declspecs->specs[(int)ds_restrict])
7394 type_quals |= TYPE_QUAL_RESTRICT;
7395 if (sfk == sfk_conversion && type_quals != TYPE_UNQUALIFIED)
7396 error ("qualifiers are not allowed on declaration of %<operator %T%>",
7399 if (TREE_CODE (type) == FUNCTION_TYPE
7400 && type_quals != TYPE_UNQUALIFIED)
7402 /* This was an error in C++98 (cv-qualifiers cannot be added to
7403 a function type), but DR 295 makes the code well-formed by
7404 dropping the extra qualifiers. */
7407 tree bad_type = build_qualified_type (type, type_quals);
7408 pedwarn ("ignoring %qV qualifiers added to function type %qT",
7411 type_quals = TYPE_UNQUALIFIED;
7413 type_quals |= cp_type_quals (type);
7414 type = cp_build_qualified_type_real
7415 (type, type_quals, ((typedef_decl && !DECL_ARTIFICIAL (typedef_decl)
7416 ? tf_ignore_bad_quals : 0) | tf_warning_or_error));
7417 /* We might have ignored or rejected some of the qualifiers. */
7418 type_quals = cp_type_quals (type);
7421 inlinep = !! declspecs->specs[(int)ds_inline];
7422 virtualp = !! declspecs->specs[(int)ds_virtual];
7423 explicitp = !! declspecs->specs[(int)ds_explicit];
7425 storage_class = declspecs->storage_class;
7426 if (storage_class == sc_static)
7427 staticp = 1 + (decl_context == FIELD);
7429 if (virtualp && staticp == 2)
7431 error ("member %qD cannot be declared both virtual and static", dname);
7432 storage_class = sc_none;
7435 friendp = !! declspecs->specs[(int)ds_friend];
7437 if (dependent_name && !friendp)
7439 error ("%<%T::%D%> is not a valid declarator", ctype, dependent_name);
7440 return error_mark_node;
7443 /* Issue errors about use of storage classes for parameters. */
7444 if (decl_context == PARM)
7446 if (declspecs->specs[(int)ds_typedef])
7448 error ("typedef declaration invalid in parameter declaration");
7449 return error_mark_node;
7451 else if (storage_class == sc_static
7452 || storage_class == sc_extern
7454 error ("storage class specifiers invalid in parameter declarations");
7457 /* Give error if `virtual' is used outside of class declaration. */
7459 && (current_class_name == NULL_TREE || decl_context != FIELD))
7461 error ("virtual outside class declaration");
7465 /* Static anonymous unions are dealt with here. */
7466 if (staticp && decl_context == TYPENAME
7468 && ANON_AGGR_TYPE_P (declspecs->type))
7469 decl_context = FIELD;
7471 /* Warn about storage classes that are invalid for certain
7472 kinds of declarations (parameters, typenames, etc.). */
7473 if (declspecs->conflicting_specifiers_p)
7475 error ("conflicting specifiers in declaration of %qs", name);
7476 storage_class = sc_none;
7480 && storage_class != sc_extern
7481 && storage_class != sc_static)
7482 || declspecs->specs[(int)ds_typedef]))
7484 error ("multiple storage classes in declaration of %qs", name);
7487 else if (decl_context != NORMAL
7488 && ((storage_class != sc_none
7489 && storage_class != sc_mutable)
7492 if ((decl_context == PARM || decl_context == CATCHPARM)
7493 && (storage_class == sc_register
7494 || storage_class == sc_auto))
7496 else if (declspecs->specs[(int)ds_typedef])
7498 else if (decl_context == FIELD
7499 /* C++ allows static class elements. */
7500 && storage_class == sc_static)
7501 /* C++ also allows inlines and signed and unsigned elements,
7502 but in those cases we don't come in here. */
7506 if (decl_context == FIELD)
7507 error ("storage class specified for %qs", name);
7510 if (decl_context == PARM || decl_context == CATCHPARM)
7511 error ("storage class specified for parameter %qs", name);
7513 error ("storage class specified for typename");
7515 if (storage_class == sc_register
7516 || storage_class == sc_auto
7517 || storage_class == sc_extern
7519 storage_class = sc_none;
7522 else if (storage_class == sc_extern && initialized
7525 if (toplevel_bindings_p ())
7527 /* It's common practice (and completely valid) to have a const
7528 be initialized and declared extern. */
7529 if (!(type_quals & TYPE_QUAL_CONST))
7530 warning (0, "%qs initialized and declared %<extern%>", name);
7533 error ("%qs has both %<extern%> and initializer", name);
7535 else if (storage_class == sc_extern && funcdef_flag
7536 && ! toplevel_bindings_p ())
7537 error ("nested function %qs declared %<extern%>", name);
7538 else if (toplevel_bindings_p ())
7540 if (storage_class == sc_auto)
7541 error ("top-level declaration of %qs specifies %<auto%>", name);
7544 && storage_class != sc_extern
7545 && storage_class != sc_static)
7547 error ("function-scope %qs implicitly auto and declared %<__thread%>",
7552 if (storage_class && friendp)
7553 error ("storage class specifiers invalid in friend function declarations");
7556 unqualified_id = NULL_TREE;
7559 unqualified_id = id_declarator->u.id.unqualified_name;
7560 switch (TREE_CODE (unqualified_id))
7564 = constructor_name (TREE_OPERAND (unqualified_id, 0));
7567 case IDENTIFIER_NODE:
7568 case TEMPLATE_ID_EXPR:
7576 /* Determine the type of the entity declared by recurring on the
7578 for (; declarator; declarator = declarator->declarator)
7580 const cp_declarator *inner_declarator;
7583 if (type == error_mark_node)
7584 return error_mark_node;
7586 attrs = declarator->attributes;
7592 if (declarator == NULL || declarator->kind == cdk_id)
7593 attr_flags |= (int) ATTR_FLAG_DECL_NEXT;
7594 if (declarator->kind == cdk_function)
7595 attr_flags |= (int) ATTR_FLAG_FUNCTION_NEXT;
7596 if (declarator->kind == cdk_array)
7597 attr_flags |= (int) ATTR_FLAG_ARRAY_NEXT;
7598 returned_attrs = decl_attributes (&type,
7599 chainon (returned_attrs, attrs),
7603 if (declarator->kind == cdk_id)
7606 inner_declarator = declarator->declarator;
7608 switch (declarator->kind)
7611 type = create_array_type_for_decl (dname, type,
7612 declarator->u.array.bounds);
7620 /* Declaring a function type.
7621 Make sure we have a valid type for the function to return. */
7623 if (type_quals != TYPE_UNQUALIFIED)
7625 if (SCALAR_TYPE_P (type) || VOID_TYPE_P (type))
7626 warning (OPT_Wreturn_type,
7627 "type qualifiers ignored on function return type");
7628 /* We now know that the TYPE_QUALS don't apply to the
7629 decl, but to its return type. */
7630 type_quals = TYPE_UNQUALIFIED;
7631 set_no_warning = true;
7634 /* Warn about some types functions can't return. */
7636 if (TREE_CODE (type) == FUNCTION_TYPE)
7638 error ("%qs declared as function returning a function", name);
7639 type = integer_type_node;
7641 if (TREE_CODE (type) == ARRAY_TYPE)
7643 error ("%qs declared as function returning an array", name);
7644 type = integer_type_node;
7647 /* Pick up type qualifiers which should be applied to `this'. */
7648 memfn_quals = declarator->u.function.qualifiers;
7650 /* Pick up the exception specifications. */
7651 raises = declarator->u.function.exception_specification;
7653 /* Say it's a definition only for the CALL_EXPR
7654 closest to the identifier. */
7655 funcdecl_p = inner_declarator && inner_declarator->kind == cdk_id;
7657 if (ctype == NULL_TREE
7658 && decl_context == FIELD
7660 && (friendp == 0 || dname == current_class_name))
7661 ctype = current_class_type;
7663 if (ctype && (sfk == sfk_constructor
7664 || sfk == sfk_destructor))
7666 /* We are within a class's scope. If our declarator name
7667 is the same as the class name, and we are defining
7668 a function, then it is a constructor/destructor, and
7669 therefore returns a void type. */
7671 /* ISO C++ 12.4/2. A destructor may not be declared
7672 const or volatile. A destructor may not be
7675 ISO C++ 12.1. A constructor may not be declared
7676 const or volatile. A constructor may not be
7677 virtual. A constructor may not be static. */
7679 error ((flags == DTOR_FLAG)
7680 ? "destructor cannot be static member function"
7681 : "constructor cannot be static member function");
7684 error ((flags == DTOR_FLAG)
7685 ? "destructors may not be cv-qualified"
7686 : "constructors may not be cv-qualified");
7687 memfn_quals = TYPE_UNQUALIFIED;
7690 if (decl_context == FIELD
7691 && !member_function_or_else (ctype,
7694 return error_mark_node;
7696 if (flags != DTOR_FLAG)
7698 /* It's a constructor. */
7703 pedwarn ("constructors cannot be declared virtual");
7706 if (decl_context == FIELD
7707 && sfk != sfk_constructor)
7708 return error_mark_node;
7710 if (decl_context == FIELD)
7716 error ("can't initialize friend function %qs", name);
7719 /* Cannot be both friend and virtual. */
7720 error ("virtual functions cannot be friends");
7723 if (decl_context == NORMAL)
7724 error ("friend declaration not in class definition");
7725 if (current_function_decl && funcdef_flag)
7726 error ("can't define friend function %qs in a local "
7731 arg_types = grokparms (declarator->u.function.parameters,
7734 if (inner_declarator
7735 && inner_declarator->kind == cdk_id
7736 && inner_declarator->u.id.sfk == sfk_destructor
7737 && arg_types != void_list_node)
7739 error ("destructors may not have parameters");
7740 arg_types = void_list_node;
7744 type = build_function_type (type, arg_types);
7751 /* Filter out pointers-to-references and references-to-references.
7752 We can get these if a TYPE_DECL is used. */
7754 if (TREE_CODE (type) == REFERENCE_TYPE)
7756 error (declarator->kind == cdk_reference
7757 ? "cannot declare reference to %q#T"
7758 : "cannot declare pointer to %q#T", type);
7759 type = TREE_TYPE (type);
7761 else if (VOID_TYPE_P (type))
7763 if (declarator->kind == cdk_reference)
7764 error ("cannot declare reference to %q#T", type);
7765 else if (declarator->kind == cdk_ptrmem)
7766 error ("cannot declare pointer to %q#T member", type);
7769 /* We now know that the TYPE_QUALS don't apply to the decl,
7770 but to the target of the pointer. */
7771 type_quals = TYPE_UNQUALIFIED;
7773 if (declarator->kind == cdk_ptrmem
7774 && (TREE_CODE (type) == FUNCTION_TYPE || memfn_quals))
7776 memfn_quals |= cp_type_quals (type);
7777 type = build_memfn_type (type,
7778 declarator->u.pointer.class_type,
7780 memfn_quals = TYPE_UNQUALIFIED;
7783 if (declarator->kind == cdk_reference)
7785 if (!VOID_TYPE_P (type))
7786 type = build_reference_type (type);
7788 else if (TREE_CODE (type) == METHOD_TYPE)
7789 type = build_ptrmemfunc_type (build_pointer_type (type));
7790 else if (declarator->kind == cdk_ptrmem)
7792 gcc_assert (TREE_CODE (declarator->u.pointer.class_type)
7794 if (declarator->u.pointer.class_type == error_mark_node)
7795 /* We will already have complained. */
7796 type = error_mark_node;
7798 type = build_ptrmem_type (declarator->u.pointer.class_type,
7802 type = build_pointer_type (type);
7804 /* Process a list of type modifier keywords (such as
7805 const or volatile) that were given inside the `*' or `&'. */
7807 if (declarator->u.pointer.qualifiers)
7810 = cp_build_qualified_type (type,
7811 declarator->u.pointer.qualifiers);
7812 type_quals = cp_type_quals (type);
7825 if (unqualified_id && TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR
7826 && TREE_CODE (type) != FUNCTION_TYPE
7827 && TREE_CODE (type) != METHOD_TYPE)
7829 error ("template-id %qD used as a declarator",
7831 unqualified_id = dname;
7834 /* If TYPE is a FUNCTION_TYPE, but the function name was explicitly
7835 qualified with a class-name, turn it into a METHOD_TYPE, unless
7836 we know that the function is static. We take advantage of this
7837 opportunity to do other processing that pertains to entities
7838 explicitly declared to be class members. Note that if DECLARATOR
7839 is non-NULL, we know it is a cdk_id declarator; otherwise, we
7840 would not have exited the loop above. */
7842 && declarator->u.id.qualifying_scope
7843 && TYPE_P (declarator->u.id.qualifying_scope))
7847 ctype = declarator->u.id.qualifying_scope;
7848 ctype = TYPE_MAIN_VARIANT (ctype);
7850 while (t != NULL_TREE && CLASS_TYPE_P (t))
7852 /* You're supposed to have one `template <...>' for every
7853 template class, but you don't need one for a full
7854 specialization. For example:
7856 template <class T> struct S{};
7857 template <> struct S<int> { void f(); };
7858 void S<int>::f () {}
7860 is correct; there shouldn't be a `template <>' for the
7861 definition of `S<int>::f'. */
7862 if (CLASSTYPE_TEMPLATE_SPECIALIZATION (t)
7863 && !any_dependent_template_arguments_p (CLASSTYPE_TI_ARGS (t)))
7864 /* T is an explicit (not partial) specialization. All
7865 containing classes must therefore also be explicitly
7868 if ((CLASSTYPE_USE_TEMPLATE (t) || CLASSTYPE_IS_TEMPLATE (t))
7869 && PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (t)))
7870 template_count += 1;
7872 t = TYPE_MAIN_DECL (t);
7873 t = DECL_CONTEXT (t);
7876 if (ctype == current_class_type)
7879 pedwarn ("member functions are implicitly friends of their class");
7881 pedwarn ("extra qualification %<%T::%> on member %qs",
7884 else if (/* If the qualifying type is already complete, then we
7885 can skip the following checks. */
7886 !COMPLETE_TYPE_P (ctype)
7887 && (/* If the function is being defined, then
7888 qualifying type must certainly be complete. */
7890 /* A friend declaration of "T::f" is OK, even if
7891 "T" is a template parameter. But, if this
7892 function is not a friend, the qualifying type
7894 || (!friendp && !CLASS_TYPE_P (ctype))
7895 /* For a declaration, the type need not be
7896 complete, if either it is dependent (since there
7897 is no meaningful definition of complete in that
7898 case) or the qualifying class is currently being
7900 || !(dependent_type_p (ctype)
7901 || currently_open_class (ctype)))
7902 /* Check that the qualifying type is complete. */
7903 && !complete_type_or_else (ctype, NULL_TREE))
7904 return error_mark_node;
7905 else if (TREE_CODE (type) == FUNCTION_TYPE)
7907 tree sname = declarator->u.id.unqualified_name;
7909 if (current_class_type
7910 && (!friendp || funcdef_flag))
7913 ? "cannot define member function %<%T::%s%> within %<%T%>"
7914 : "cannot declare member function %<%T::%s%> within %<%T%>",
7915 ctype, name, current_class_type);
7916 return error_mark_node;
7919 if (TREE_CODE (sname) == IDENTIFIER_NODE
7920 && NEW_DELETE_OPNAME_P (sname))
7921 /* Overloaded operator new and operator delete
7922 are always static functions. */
7925 type = build_memfn_type (type, ctype, memfn_quals);
7927 else if (declspecs->specs[(int)ds_typedef]
7928 && current_class_type)
7930 error ("cannot declare member %<%T::%s%> within %qT",
7931 ctype, name, current_class_type);
7932 return error_mark_node;
7936 /* Now TYPE has the actual type. */
7941 *attrlist = chainon (returned_attrs, *attrlist);
7943 attrlist = &returned_attrs;
7946 /* Did array size calculations overflow? */
7948 if (TREE_CODE (type) == ARRAY_TYPE
7949 && COMPLETE_TYPE_P (type)
7950 && TREE_CODE (TYPE_SIZE_UNIT (type)) == INTEGER_CST
7951 && TREE_OVERFLOW (TYPE_SIZE_UNIT (type)))
7953 error ("size of array %qs is too large", name);
7954 /* If we proceed with the array type as it is, we'll eventually
7955 crash in tree_low_cst(). */
7956 type = error_mark_node;
7959 if ((decl_context == FIELD || decl_context == PARM)
7960 && !processing_template_decl
7961 && variably_modified_type_p (type, NULL_TREE))
7963 if (decl_context == FIELD)
7964 error ("data member may not have variably modified type %qT", type);
7966 error ("parameter may not have variably modified type %qT", type);
7967 type = error_mark_node;
7970 if (explicitp == 1 || (explicitp && friendp))
7972 /* [dcl.fct.spec] The explicit specifier shall only be used in
7973 declarations of constructors within a class definition. */
7974 error ("only declarations of constructors can be %<explicit%>");
7978 if (storage_class == sc_mutable)
7980 if (decl_context != FIELD || friendp)
7982 error ("non-member %qs cannot be declared %<mutable%>", name);
7983 storage_class = sc_none;
7985 else if (decl_context == TYPENAME || declspecs->specs[(int)ds_typedef])
7987 error ("non-object member %qs cannot be declared %<mutable%>", name);
7988 storage_class = sc_none;
7990 else if (TREE_CODE (type) == FUNCTION_TYPE
7991 || TREE_CODE (type) == METHOD_TYPE)
7993 error ("function %qs cannot be declared %<mutable%>", name);
7994 storage_class = sc_none;
7998 error ("static %qs cannot be declared %<mutable%>", name);
7999 storage_class = sc_none;
8001 else if (type_quals & TYPE_QUAL_CONST)
8003 error ("const %qs cannot be declared %<mutable%>", name);
8004 storage_class = sc_none;
8008 /* If this is declaring a typedef name, return a TYPE_DECL. */
8009 if (declspecs->specs[(int)ds_typedef] && decl_context != TYPENAME)
8013 /* Note that the grammar rejects storage classes
8014 in typenames, fields or parameters. */
8015 if (current_lang_name == lang_name_java)
8016 TYPE_FOR_JAVA (type) = 1;
8018 /* This declaration:
8020 typedef void f(int) const;
8022 declares a function type which is not a member of any
8023 particular class, but which is cv-qualified; for
8024 example "f S::*" declares a pointer to a const-qualified
8025 member function of S. We record the cv-qualification in the
8027 if (memfn_quals && TREE_CODE (type) == FUNCTION_TYPE)
8028 type = cp_build_qualified_type (type, memfn_quals);
8030 if (decl_context == FIELD)
8031 decl = build_lang_decl (TYPE_DECL, unqualified_id, type);
8033 decl = build_decl (TYPE_DECL, unqualified_id, type);
8034 if (id_declarator && declarator->u.id.qualifying_scope)
8035 error ("%Jtypedef name may not be a nested-name-specifier", decl);
8037 if (decl_context != FIELD)
8039 if (!current_function_decl)
8040 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
8041 else if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (current_function_decl)
8042 || (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P
8043 (current_function_decl)))
8044 /* The TYPE_DECL is "abstract" because there will be
8045 clones of this constructor/destructor, and there will
8046 be copies of this TYPE_DECL generated in those
8048 DECL_ABSTRACT (decl) = 1;
8050 else if (constructor_name_p (unqualified_id, current_class_type))
8051 pedwarn ("ISO C++ forbids nested type %qD with same name "
8052 "as enclosing class",
8055 /* If the user declares "typedef struct {...} foo" then the
8056 struct will have an anonymous name. Fill that name in now.
8057 Nothing can refer to it, so nothing needs know about the name
8059 if (type != error_mark_node
8062 && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
8063 && TYPE_ANONYMOUS_P (type)
8064 /* Don't do this if there are attributes. */
8065 && (!attrlist || !*attrlist)
8066 && cp_type_quals (type) == TYPE_UNQUALIFIED)
8068 tree oldname = TYPE_NAME (type);
8071 /* Replace the anonymous name with the real name everywhere. */
8072 for (t = TYPE_MAIN_VARIANT (type); t; t = TYPE_NEXT_VARIANT (t))
8073 if (TYPE_NAME (t) == oldname)
8074 TYPE_NAME (t) = decl;
8076 if (TYPE_LANG_SPECIFIC (type))
8077 TYPE_WAS_ANONYMOUS (type) = 1;
8079 /* If this is a typedef within a template class, the nested
8080 type is a (non-primary) template. The name for the
8081 template needs updating as well. */
8082 if (TYPE_LANG_SPECIFIC (type) && CLASSTYPE_TEMPLATE_INFO (type))
8083 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type))
8084 = TYPE_IDENTIFIER (type);
8086 /* FIXME remangle member functions; member functions of a
8087 type with external linkage have external linkage. */
8090 /* Any qualifiers on a function type typedef have already been
8092 if (memfn_quals && !ctype && TREE_CODE (type) == FUNCTION_TYPE)
8093 memfn_quals = TYPE_UNQUALIFIED;
8096 || (typedef_decl && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl)))
8097 C_TYPEDEF_EXPLICITLY_SIGNED (decl) = 1;
8099 bad_specifiers (decl, "type", virtualp,
8100 memfn_quals != TYPE_UNQUALIFIED,
8101 inlinep, friendp, raises != NULL_TREE);
8106 /* Detect the case of an array type of unspecified size
8107 which came, as such, direct from a typedef name.
8108 We must copy the type, so that the array's domain can be
8109 individually set by the object's initializer. */
8111 if (type && typedef_type
8112 && TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type)
8113 && TYPE_MAIN_VARIANT (type) == TYPE_MAIN_VARIANT (typedef_type))
8114 type = build_cplus_array_type (TREE_TYPE (type), NULL_TREE);
8116 /* Detect where we're using a typedef of function type to declare a
8117 function. PARMS will not be set, so we must create it now. */
8119 if (type == typedef_type && TREE_CODE (type) == FUNCTION_TYPE)
8121 tree decls = NULL_TREE;
8124 for (args = TYPE_ARG_TYPES (type); args; args = TREE_CHAIN (args))
8126 tree decl = cp_build_parm_decl (NULL_TREE, TREE_VALUE (args));
8128 TREE_CHAIN (decl) = decls;
8132 parms = nreverse (decls);
8134 if (decl_context != TYPENAME)
8136 /* A cv-qualifier-seq shall only be part of the function type
8137 for a non-static member function. [8.3.5/4 dcl.fct] */
8138 if (cp_type_quals (type) != TYPE_UNQUALIFIED
8139 && (current_class_type == NULL_TREE || staticp) )
8142 ? G_("qualified function types cannot be used to "
8143 "declare static member functions")
8144 : G_("qualified function types cannot be used to "
8145 "declare free functions"));
8146 type = TYPE_MAIN_VARIANT (type);
8149 /* The qualifiers on the function type become the qualifiers on
8150 the non-static member function. */
8151 memfn_quals |= cp_type_quals (type);
8155 /* If this is a type name (such as, in a cast or sizeof),
8156 compute the type and return it now. */
8158 if (decl_context == TYPENAME)
8160 /* Note that the grammar rejects storage classes
8161 in typenames, fields or parameters. */
8162 if (type_quals != TYPE_UNQUALIFIED)
8163 type_quals = TYPE_UNQUALIFIED;
8165 /* Special case: "friend class foo" looks like a TYPENAME context. */
8168 if (type_quals != TYPE_UNQUALIFIED)
8170 error ("type qualifiers specified for friend class declaration");
8171 type_quals = TYPE_UNQUALIFIED;
8175 error ("%<inline%> specified for friend class declaration");
8181 /* Don't allow friend declaration without a class-key. */
8182 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
8183 pedwarn ("template parameters cannot be friends");
8184 else if (TREE_CODE (type) == TYPENAME_TYPE)
8185 pedwarn ("friend declaration requires class-key, "
8186 "i.e. %<friend class %T::%D%>",
8187 TYPE_CONTEXT (type), TYPENAME_TYPE_FULLNAME (type));
8189 pedwarn ("friend declaration requires class-key, "
8190 "i.e. %<friend %#T%>",
8194 /* Only try to do this stuff if we didn't already give up. */
8195 if (type != integer_type_node)
8197 /* A friendly class? */
8198 if (current_class_type)
8199 make_friend_class (current_class_type, TYPE_MAIN_VARIANT (type),
8202 error ("trying to make class %qT a friend of global scope",
8205 type = void_type_node;
8208 else if (memfn_quals)
8210 if (ctype == NULL_TREE)
8212 if (TREE_CODE (type) != METHOD_TYPE)
8213 error ("invalid qualifiers on non-member function type");
8215 ctype = TYPE_METHOD_BASETYPE (type);
8218 type = build_memfn_type (type, ctype, memfn_quals);
8223 else if (unqualified_id == NULL_TREE && decl_context != PARM
8224 && decl_context != CATCHPARM
8225 && TREE_CODE (type) != UNION_TYPE
8228 error ("abstract declarator %qT used as declaration", type);
8229 return error_mark_node;
8232 /* Only functions may be declared using an operator-function-id. */
8234 && IDENTIFIER_OPNAME_P (unqualified_id)
8235 && TREE_CODE (type) != FUNCTION_TYPE
8236 && TREE_CODE (type) != METHOD_TYPE)
8238 error ("declaration of %qD as non-function", unqualified_id);
8239 return error_mark_node;
8242 /* We don't check parameter types here because we can emit a better
8243 error message later. */
8244 if (decl_context != PARM)
8246 type = check_var_type (unqualified_id, type);
8247 if (type == error_mark_node)
8248 return error_mark_node;
8251 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
8252 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
8254 if (decl_context == PARM || decl_context == CATCHPARM)
8256 if (ctype || in_namespace)
8257 error ("cannot use %<::%> in parameter declaration");
8259 /* A parameter declared as an array of T is really a pointer to T.
8260 One declared as a function is really a pointer to a function.
8261 One declared as a member is really a pointer to member. */
8263 if (TREE_CODE (type) == ARRAY_TYPE)
8265 /* Transfer const-ness of array into that of type pointed to. */
8266 type = build_pointer_type (TREE_TYPE (type));
8267 type_quals = TYPE_UNQUALIFIED;
8269 else if (TREE_CODE (type) == FUNCTION_TYPE)
8270 type = build_pointer_type (type);
8276 if (decl_context == PARM)
8278 decl = cp_build_parm_decl (unqualified_id, type);
8280 bad_specifiers (decl, "parameter", virtualp,
8281 memfn_quals != TYPE_UNQUALIFIED,
8282 inlinep, friendp, raises != NULL_TREE);
8284 else if (decl_context == FIELD)
8286 /* The C99 flexible array extension. */
8287 if (!staticp && TREE_CODE (type) == ARRAY_TYPE
8288 && TYPE_DOMAIN (type) == NULL_TREE)
8290 tree itype = compute_array_index_type (dname, integer_zero_node);
8291 type = build_cplus_array_type (TREE_TYPE (type), itype);
8294 if (type == error_mark_node)
8296 /* Happens when declaring arrays of sizes which
8297 are error_mark_node, for example. */
8300 else if (in_namespace && !friendp)
8302 /* Something like struct S { int N::j; }; */
8303 error ("invalid use of %<::%>");
8304 return error_mark_node;
8306 else if (TREE_CODE (type) == FUNCTION_TYPE)
8309 tree function_context;
8313 if (ctype == NULL_TREE)
8314 ctype = current_class_type;
8316 if (ctype == NULL_TREE)
8318 error ("can't make %qD into a method -- not in a class",
8320 return error_mark_node;
8323 /* ``A union may [ ... ] not [ have ] virtual functions.''
8325 if (virtualp && TREE_CODE (ctype) == UNION_TYPE)
8327 error ("function %qD declared virtual inside a union",
8329 return error_mark_node;
8332 if (NEW_DELETE_OPNAME_P (unqualified_id))
8336 error ("%qD cannot be declared virtual, since it "
8342 else if (staticp < 2)
8343 type = build_memfn_type (type, ctype, memfn_quals);
8346 /* Check that the name used for a destructor makes sense. */
8347 if (sfk == sfk_destructor)
8351 gcc_assert (friendp);
8352 error ("expected qualified name in friend declaration "
8353 "for destructor %qD",
8354 id_declarator->u.id.unqualified_name);
8355 return error_mark_node;
8358 if (!same_type_p (TREE_OPERAND
8359 (id_declarator->u.id.unqualified_name, 0),
8362 error ("declaration of %qD as member of %qT",
8363 id_declarator->u.id.unqualified_name, ctype);
8364 return error_mark_node;
8368 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
8369 function_context = (ctype != NULL_TREE) ?
8370 decl_function_context (TYPE_MAIN_DECL (ctype)) : NULL_TREE;
8371 publicp = (! friendp || ! staticp)
8372 && function_context == NULL_TREE;
8373 decl = grokfndecl (ctype, type,
8374 TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
8375 ? unqualified_id : dname,
8378 virtualp, flags, memfn_quals, raises,
8379 friendp ? -1 : 0, friendp, publicp, inlinep,
8381 funcdef_flag, template_count, in_namespace, attrlist);
8382 if (decl == NULL_TREE)
8383 return error_mark_node;
8385 /* This clobbers the attrs stored in `decl' from `attrlist'. */
8386 /* The decl and setting of decl_attr is also turned off. */
8387 decl = build_decl_attribute_variant (decl, decl_attr);
8390 /* [class.conv.ctor]
8392 A constructor declared without the function-specifier
8393 explicit that can be called with a single parameter
8394 specifies a conversion from the type of its first
8395 parameter to the type of its class. Such a constructor
8396 is called a converting constructor. */
8398 DECL_NONCONVERTING_P (decl) = 1;
8399 else if (DECL_CONSTRUCTOR_P (decl))
8401 /* The constructor can be called with exactly one
8402 parameter if there is at least one parameter, and
8403 any subsequent parameters have default arguments.
8404 Ignore any compiler-added parms. */
8405 tree arg_types = FUNCTION_FIRST_USER_PARMTYPE (decl);
8407 if (arg_types == void_list_node
8409 && TREE_CHAIN (arg_types)
8410 && TREE_CHAIN (arg_types) != void_list_node
8411 && !TREE_PURPOSE (TREE_CHAIN (arg_types))))
8412 DECL_NONCONVERTING_P (decl) = 1;
8415 else if (TREE_CODE (type) == METHOD_TYPE)
8417 /* We only get here for friend declarations of
8418 members of other classes. */
8419 /* All method decls are public, so tell grokfndecl to set
8420 TREE_PUBLIC, also. */
8421 decl = grokfndecl (ctype, type,
8422 TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
8423 ? unqualified_id : dname,
8426 virtualp, flags, memfn_quals, raises,
8427 friendp ? -1 : 0, friendp, 1, 0, sfk,
8428 funcdef_flag, template_count, in_namespace,
8430 if (decl == NULL_TREE)
8431 return error_mark_node;
8433 else if (!staticp && !dependent_type_p (type)
8434 && !COMPLETE_TYPE_P (complete_type (type))
8435 && (TREE_CODE (type) != ARRAY_TYPE || initialized == 0))
8438 error ("field %qD has incomplete type", unqualified_id);
8440 error ("name %qT has incomplete type", type);
8442 /* If we're instantiating a template, tell them which
8443 instantiation made the field's type be incomplete. */
8444 if (current_class_type
8445 && TYPE_NAME (current_class_type)
8446 && IDENTIFIER_TEMPLATE (TYPE_IDENTIFIER (current_class_type))
8448 && declspecs->type == type)
8449 error (" in instantiation of template %qT",
8450 current_class_type);
8452 return error_mark_node;
8458 error ("%qE is neither function nor member function; "
8459 "cannot be declared friend", unqualified_id);
8467 /* Friends are treated specially. */
8468 if (ctype == current_class_type)
8469 ; /* We already issued a pedwarn. */
8470 else if (decl && DECL_NAME (decl))
8472 if (template_class_depth (current_class_type) == 0)
8474 decl = check_explicit_specialization
8475 (unqualified_id, decl, template_count,
8476 2 * funcdef_flag + 4);
8477 if (decl == error_mark_node)
8478 return error_mark_node;
8481 decl = do_friend (ctype, unqualified_id, decl,
8487 return error_mark_node;
8490 /* Structure field. It may not be a function, except for C++. */
8492 if (decl == NULL_TREE)
8498 /* An attempt is being made to initialize a non-static
8499 member. But, from [class.mem]:
8501 4 A member-declarator can contain a
8502 constant-initializer only if it declares a static
8503 member (_class.static_) of integral or enumeration
8504 type, see _class.static.data_.
8506 This used to be relatively common practice, but
8507 the rest of the compiler does not correctly
8508 handle the initialization unless the member is
8509 static so we make it static below. */
8510 pedwarn ("ISO C++ forbids initialization of member %qD",
8512 pedwarn ("making %qD static", unqualified_id);
8516 if (uses_template_parms (type))
8517 /* We'll check at instantiation time. */
8519 else if (check_static_variable_definition (unqualified_id,
8521 /* If we just return the declaration, crashes
8522 will sometimes occur. We therefore return
8523 void_type_node, as if this was a friend
8524 declaration, to cause callers to completely
8525 ignore this declaration. */
8526 return error_mark_node;
8531 /* C++ allows static class members. All other work
8532 for this is done by grokfield. */
8533 decl = build_lang_decl (VAR_DECL, unqualified_id, type);
8534 set_linkage_for_static_data_member (decl);
8535 /* Even if there is an in-class initialization, DECL
8536 is considered undefined until an out-of-class
8537 definition is provided. */
8538 DECL_EXTERNAL (decl) = 1;
8542 if (targetm.have_tls)
8543 DECL_TLS_MODEL (decl) = decl_default_tls_model (decl);
8545 /* A mere warning is sure to result in improper
8546 semantics at runtime. Don't bother to allow this to
8548 error ("thread-local storage not supported for this target");
8553 decl = build_decl (FIELD_DECL, unqualified_id, type);
8554 DECL_NONADDRESSABLE_P (decl) = bitfield;
8555 if (storage_class == sc_mutable)
8557 DECL_MUTABLE_P (decl) = 1;
8558 storage_class = sc_none;
8562 bad_specifiers (decl, "field", virtualp,
8563 memfn_quals != TYPE_UNQUALIFIED,
8564 inlinep, friendp, raises != NULL_TREE);
8567 else if (TREE_CODE (type) == FUNCTION_TYPE
8568 || TREE_CODE (type) == METHOD_TYPE)
8573 if (!unqualified_id)
8574 return error_mark_node;
8576 if (TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR)
8577 original_name = dname;
8579 original_name = unqualified_id;
8581 if (storage_class == sc_auto)
8582 error ("storage class %<auto%> invalid for function %qs", name);
8583 else if (storage_class == sc_register)
8584 error ("storage class %<register%> invalid for function %qs", name);
8586 error ("storage class %<__thread%> invalid for function %qs", name);
8588 /* Function declaration not at top level.
8589 Storage classes other than `extern' are not allowed
8590 and `extern' makes no difference. */
8591 if (! toplevel_bindings_p ()
8592 && (storage_class == sc_static
8593 || declspecs->specs[(int)ds_inline])
8596 if (storage_class == sc_static)
8597 pedwarn ("%<static%> specified invalid for function %qs "
8598 "declared out of global scope", name);
8600 pedwarn ("%<inline%> specifier invalid for function %qs "
8601 "declared out of global scope", name);
8604 if (ctype == NULL_TREE)
8608 error ("virtual non-class function %qs", name);
8612 else if (TREE_CODE (type) == FUNCTION_TYPE && staticp < 2
8613 && !NEW_DELETE_OPNAME_P (original_name))
8614 type = build_method_type_directly (ctype,
8616 TYPE_ARG_TYPES (type));
8618 /* Record presence of `static'. */
8619 publicp = (ctype != NULL_TREE
8620 || storage_class == sc_extern
8621 || storage_class != sc_static);
8623 decl = grokfndecl (ctype, type, original_name, parms, unqualified_id,
8624 virtualp, flags, memfn_quals, raises,
8626 publicp, inlinep, sfk, funcdef_flag,
8627 template_count, in_namespace, attrlist);
8628 if (decl == NULL_TREE)
8629 return error_mark_node;
8633 int invalid_static = 0;
8635 /* Don't allow a static member function in a class, and forbid
8636 declaring main to be static. */
8637 if (TREE_CODE (type) == METHOD_TYPE)
8639 pedwarn ("cannot declare member function %qD to have "
8640 "static linkage", decl);
8643 else if (current_function_decl)
8645 /* FIXME need arm citation */
8646 error ("cannot declare static function inside another function");
8653 storage_class = sc_none;
8659 /* It's a variable. */
8661 /* An uninitialized decl with `extern' is a reference. */
8662 decl = grokvardecl (type, unqualified_id,
8665 (type_quals & TYPE_QUAL_CONST) != 0,
8666 ctype ? ctype : in_namespace);
8667 bad_specifiers (decl, "variable", virtualp,
8668 memfn_quals != TYPE_UNQUALIFIED,
8669 inlinep, friendp, raises != NULL_TREE);
8673 DECL_CONTEXT (decl) = ctype;
8676 pedwarn ("%<static%> may not be used when defining "
8677 "(as opposed to declaring) a static data member");
8679 storage_class = sc_none;
8681 if (storage_class == sc_register && TREE_STATIC (decl))
8683 error ("static member %qD declared %<register%>", decl);
8684 storage_class = sc_none;
8686 if (storage_class == sc_extern && pedantic)
8688 pedwarn ("cannot explicitly declare member %q#D to have "
8691 storage_class = sc_none;
8696 /* Record `register' declaration for warnings on &
8697 and in case doing stupid register allocation. */
8699 if (storage_class == sc_register)
8700 DECL_REGISTER (decl) = 1;
8701 else if (storage_class == sc_extern)
8702 DECL_THIS_EXTERN (decl) = 1;
8703 else if (storage_class == sc_static)
8704 DECL_THIS_STATIC (decl) = 1;
8706 /* Record constancy and volatility. There's no need to do this
8707 when processing a template; we'll do this for the instantiated
8708 declaration based on the type of DECL. */
8709 if (!processing_template_decl)
8710 cp_apply_type_quals_to_decl (type_quals, decl);
8713 TREE_NO_WARNING (decl) = 1;
8719 /* Subroutine of start_function. Ensure that each of the parameter
8720 types (as listed in PARMS) is complete, as is required for a
8721 function definition. */
8724 require_complete_types_for_parms (tree parms)
8726 for (; parms; parms = TREE_CHAIN (parms))
8728 if (dependent_type_p (TREE_TYPE (parms)))
8730 if (!VOID_TYPE_P (TREE_TYPE (parms))
8731 && complete_type_or_else (TREE_TYPE (parms), parms))
8733 relayout_decl (parms);
8734 DECL_ARG_TYPE (parms) = type_passed_as (TREE_TYPE (parms));
8737 /* grokparms or complete_type_or_else will have already issued
8739 TREE_TYPE (parms) = error_mark_node;
8743 /* Returns nonzero if T is a local variable. */
8746 local_variable_p (tree t)
8748 if ((TREE_CODE (t) == VAR_DECL
8749 /* A VAR_DECL with a context that is a _TYPE is a static data
8751 && !TYPE_P (CP_DECL_CONTEXT (t))
8752 /* Any other non-local variable must be at namespace scope. */
8753 && !DECL_NAMESPACE_SCOPE_P (t))
8754 || (TREE_CODE (t) == PARM_DECL))
8760 /* Returns nonzero if T is an automatic local variable or a label.
8761 (These are the declarations that need to be remapped when the code
8762 containing them is duplicated.) */
8765 nonstatic_local_decl_p (tree t)
8767 return ((local_variable_p (t) && !TREE_STATIC (t))
8768 || TREE_CODE (t) == LABEL_DECL
8769 || TREE_CODE (t) == RESULT_DECL);
8772 /* Like local_variable_p, but suitable for use as a tree-walking
8776 local_variable_p_walkfn (tree *tp, int *walk_subtrees,
8777 void *data ATTRIBUTE_UNUSED)
8779 if (local_variable_p (*tp) && !DECL_ARTIFICIAL (*tp))
8781 else if (TYPE_P (*tp))
8788 /* Check that ARG, which is a default-argument expression for a
8789 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
8790 something goes wrong. DECL may also be a _TYPE node, rather than a
8791 DECL, if there is no DECL available. */
8794 check_default_argument (tree decl, tree arg)
8799 if (TREE_CODE (arg) == DEFAULT_ARG)
8800 /* We get a DEFAULT_ARG when looking at an in-class declaration
8801 with a default argument. Ignore the argument for now; we'll
8802 deal with it after the class is complete. */
8811 decl_type = TREE_TYPE (decl);
8813 if (arg == error_mark_node
8814 || decl == error_mark_node
8815 || TREE_TYPE (arg) == error_mark_node
8816 || decl_type == error_mark_node)
8817 /* Something already went wrong. There's no need to check
8819 return error_mark_node;
8821 /* [dcl.fct.default]
8823 A default argument expression is implicitly converted to the
8825 if (!TREE_TYPE (arg)
8826 || !can_convert_arg (decl_type, TREE_TYPE (arg), arg, LOOKUP_NORMAL))
8829 error ("default argument for %q#D has type %qT",
8830 decl, TREE_TYPE (arg));
8832 error ("default argument for parameter of type %qT has type %qT",
8833 decl_type, TREE_TYPE (arg));
8835 return error_mark_node;
8838 /* [dcl.fct.default]
8840 Local variables shall not be used in default argument
8843 The keyword `this' shall not be used in a default argument of a
8845 var = walk_tree_without_duplicates (&arg, local_variable_p_walkfn,
8849 error ("default argument %qE uses local variable %qD", arg, var);
8850 return error_mark_node;
8857 /* Decode the list of parameter types for a function type.
8858 Given the list of things declared inside the parens,
8859 return a list of types.
8861 If this parameter does not end with an ellipsis, we append
8864 *PARMS is set to the chain of PARM_DECLs created. */
8867 grokparms (cp_parameter_declarator *first_parm, tree *parms)
8869 tree result = NULL_TREE;
8870 tree decls = NULL_TREE;
8871 int ellipsis = !first_parm || first_parm->ellipsis_p;
8872 cp_parameter_declarator *parm;
8875 for (parm = first_parm; parm != NULL; parm = parm->next)
8877 tree type = NULL_TREE;
8878 tree init = parm->default_argument;
8882 if (parm == no_parameters)
8885 attrs = parm->decl_specifiers.attributes;
8886 parm->decl_specifiers.attributes = NULL_TREE;
8887 decl = grokdeclarator (parm->declarator, &parm->decl_specifiers,
8888 PARM, init != NULL_TREE, &attrs);
8889 if (! decl || TREE_TYPE (decl) == error_mark_node)
8893 cplus_decl_attributes (&decl, attrs, 0);
8895 type = TREE_TYPE (decl);
8896 if (VOID_TYPE_P (type))
8898 if (same_type_p (type, void_type_node)
8899 && DECL_SELF_REFERENCE_P (type)
8900 && !DECL_NAME (decl) && !result && !parm->next && !ellipsis)
8901 /* this is a parmlist of `(void)', which is ok. */
8903 cxx_incomplete_type_error (decl, type);
8904 /* It's not a good idea to actually create parameters of
8905 type `void'; other parts of the compiler assume that a
8906 void type terminates the parameter list. */
8907 type = error_mark_node;
8908 TREE_TYPE (decl) = error_mark_node;
8911 if (type != error_mark_node)
8913 /* Top-level qualifiers on the parameters are
8914 ignored for function types. */
8915 type = cp_build_qualified_type (type, 0);
8916 if (TREE_CODE (type) == METHOD_TYPE)
8918 error ("parameter %qD invalidly declared method type", decl);
8919 type = build_pointer_type (type);
8920 TREE_TYPE (decl) = type;
8922 else if (abstract_virtuals_error (decl, type))
8923 any_error = 1; /* Seems like a good idea. */
8924 else if (POINTER_TYPE_P (type))
8926 /* [dcl.fct]/6, parameter types cannot contain pointers
8927 (references) to arrays of unknown bound. */
8928 tree t = TREE_TYPE (type);
8929 int ptr = TYPE_PTR_P (type);
8935 else if (TREE_CODE (t) != ARRAY_TYPE)
8937 else if (!TYPE_DOMAIN (t))
8941 if (TREE_CODE (t) == ARRAY_TYPE)
8942 error ("parameter %qD includes %s to array of unknown "
8944 decl, ptr ? "pointer" : "reference", t);
8949 else if (init && !processing_template_decl)
8950 init = check_default_argument (decl, init);
8953 TREE_CHAIN (decl) = decls;
8955 result = tree_cons (init, type, result);
8957 decls = nreverse (decls);
8958 result = nreverse (result);
8960 result = chainon (result, void_list_node);
8967 /* D is a constructor or overloaded `operator='.
8969 Let T be the class in which D is declared. Then, this function
8972 -1 if D's is an ill-formed constructor or copy assignment operator
8973 whose first parameter is of type `T'.
8974 0 if D is not a copy constructor or copy assignment
8976 1 if D is a copy constructor or copy assignment operator whose
8977 first parameter is a reference to const qualified T.
8978 2 if D is a copy constructor or copy assignment operator whose
8979 first parameter is a reference to non-const qualified T.
8981 This function can be used as a predicate. Positive values indicate
8982 a copy constructor and nonzero values indicate a copy assignment
8992 gcc_assert (DECL_FUNCTION_MEMBER_P (d));
8994 if (TREE_CODE (d) == TEMPLATE_DECL
8995 || (DECL_TEMPLATE_INFO (d)
8996 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d))))
8997 /* Instantiations of template member functions are never copy
8998 functions. Note that member functions of templated classes are
8999 represented as template functions internally, and we must
9000 accept those as copy functions. */
9003 args = FUNCTION_FIRST_USER_PARMTYPE (d);
9007 arg_type = TREE_VALUE (args);
9008 if (arg_type == error_mark_node)
9011 if (TYPE_MAIN_VARIANT (arg_type) == DECL_CONTEXT (d))
9013 /* Pass by value copy assignment operator. */
9016 else if (TREE_CODE (arg_type) == REFERENCE_TYPE
9017 && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type)) == DECL_CONTEXT (d))
9019 if (CP_TYPE_CONST_P (TREE_TYPE (arg_type)))
9025 args = TREE_CHAIN (args);
9027 if (args && args != void_list_node && !TREE_PURPOSE (args))
9028 /* There are more non-optional args. */
9034 /* Remember any special properties of member function DECL. */
9036 void grok_special_member_properties (tree decl)
9040 if (!DECL_NONSTATIC_MEMBER_FUNCTION_P (decl))
9043 class_type = DECL_CONTEXT (decl);
9044 if (DECL_CONSTRUCTOR_P (decl))
9046 int ctor = copy_fn_p (decl);
9048 TYPE_HAS_CONSTRUCTOR (class_type) = 1;
9054 A non-template constructor for class X is a copy
9055 constructor if its first parameter is of type X&, const
9056 X&, volatile X& or const volatile X&, and either there
9057 are no other parameters or else all other parameters have
9058 default arguments. */
9059 TYPE_HAS_INIT_REF (class_type) = 1;
9061 TYPE_HAS_CONST_INIT_REF (class_type) = 1;
9063 else if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl)))
9064 TYPE_HAS_DEFAULT_CONSTRUCTOR (class_type) = 1;
9066 else if (DECL_OVERLOADED_OPERATOR_P (decl) == NOP_EXPR)
9070 A non-template assignment operator for class X is a copy
9071 assignment operator if its parameter is of type X, X&, const
9072 X&, volatile X& or const volatile X&. */
9074 int assop = copy_fn_p (decl);
9078 TYPE_HAS_ASSIGN_REF (class_type) = 1;
9080 TYPE_HAS_CONST_ASSIGN_REF (class_type) = 1;
9085 /* Check a constructor DECL has the correct form. Complains
9086 if the class has a constructor of the form X(X). */
9089 grok_ctor_properties (tree ctype, tree decl)
9091 int ctor_parm = copy_fn_p (decl);
9097 A declaration of a constructor for a class X is ill-formed if
9098 its first parameter is of type (optionally cv-qualified) X
9099 and either there are no other parameters or else all other
9100 parameters have default arguments.
9102 We *don't* complain about member template instantiations that
9103 have this form, though; they can occur as we try to decide
9104 what constructor to use during overload resolution. Since
9105 overload resolution will never prefer such a constructor to
9106 the non-template copy constructor (which is either explicitly
9107 or implicitly defined), there's no need to worry about their
9108 existence. Theoretically, they should never even be
9109 instantiated, but that's hard to forestall. */
9110 error ("invalid constructor; you probably meant %<%T (const %T&)%>",
9118 /* An operator with this code is unary, but can also be binary. */
9121 ambi_op_p (enum tree_code code)
9123 return (code == INDIRECT_REF
9124 || code == ADDR_EXPR
9125 || code == UNARY_PLUS_EXPR
9126 || code == NEGATE_EXPR
9127 || code == PREINCREMENT_EXPR
9128 || code == PREDECREMENT_EXPR);
9131 /* An operator with this name can only be unary. */
9134 unary_op_p (enum tree_code code)
9136 return (code == TRUTH_NOT_EXPR
9137 || code == BIT_NOT_EXPR
9138 || code == COMPONENT_REF
9139 || code == TYPE_EXPR);
9142 /* DECL is a declaration for an overloaded operator. If COMPLAIN is true,
9143 errors are issued for invalid declarations. */
9146 grok_op_properties (tree decl, bool complain)
9148 tree argtypes = TYPE_ARG_TYPES (TREE_TYPE (decl));
9150 int methodp = (TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE);
9151 tree name = DECL_NAME (decl);
9152 enum tree_code operator_code;
9157 /* Count the number of arguments and check for ellipsis. */
9158 for (argtype = argtypes, arity = 0;
9159 argtype && argtype != void_list_node;
9160 argtype = TREE_CHAIN (argtype))
9162 ellipsis_p = !argtype;
9164 class_type = DECL_CONTEXT (decl);
9165 if (class_type && !CLASS_TYPE_P (class_type))
9166 class_type = NULL_TREE;
9168 if (DECL_CONV_FN_P (decl))
9169 operator_code = TYPE_EXPR;
9173 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
9174 if (ansi_opname (CODE) == name) \
9176 operator_code = (CODE); \
9179 else if (ansi_assopname (CODE) == name) \
9181 operator_code = (CODE); \
9182 DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
9186 #include "operators.def"
9192 gcc_assert (operator_code != LAST_CPLUS_TREE_CODE);
9193 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
9196 switch (operator_code)
9199 TYPE_HAS_NEW_OPERATOR (class_type) = 1;
9203 TYPE_GETS_DELETE (class_type) |= 1;
9207 TYPE_HAS_ARRAY_NEW_OPERATOR (class_type) = 1;
9210 case VEC_DELETE_EXPR:
9211 TYPE_GETS_DELETE (class_type) |= 2;
9218 /* [basic.std.dynamic.allocation]/1:
9220 A program is ill-formed if an allocation function is declared
9221 in a namespace scope other than global scope or declared static
9224 The same also holds true for deallocation functions. */
9225 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR
9226 || operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
9228 if (DECL_NAMESPACE_SCOPE_P (decl))
9230 if (CP_DECL_CONTEXT (decl) != global_namespace)
9232 error ("%qD may not be declared within a namespace", decl);
9235 else if (!TREE_PUBLIC (decl))
9237 error ("%qD may not be declared as static", decl);
9243 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR)
9244 TREE_TYPE (decl) = coerce_new_type (TREE_TYPE (decl));
9245 else if (operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
9246 TREE_TYPE (decl) = coerce_delete_type (TREE_TYPE (decl));
9249 /* An operator function must either be a non-static member function
9250 or have at least one parameter of a class, a reference to a class,
9251 an enumeration, or a reference to an enumeration. 13.4.0.6 */
9252 if (! methodp || DECL_STATIC_FUNCTION_P (decl))
9254 if (operator_code == TYPE_EXPR
9255 || operator_code == CALL_EXPR
9256 || operator_code == COMPONENT_REF
9257 || operator_code == ARRAY_REF
9258 || operator_code == NOP_EXPR)
9260 error ("%qD must be a nonstatic member function", decl);
9267 if (DECL_STATIC_FUNCTION_P (decl))
9269 error ("%qD must be either a non-static member "
9270 "function or a non-member function", decl);
9274 for (p = argtypes; p && p != void_list_node; p = TREE_CHAIN (p))
9276 tree arg = non_reference (TREE_VALUE (p));
9277 if (arg == error_mark_node)
9280 /* IS_AGGR_TYPE, rather than CLASS_TYPE_P, is used
9281 because these checks are performed even on
9282 template functions. */
9283 if (IS_AGGR_TYPE (arg) || TREE_CODE (arg) == ENUMERAL_TYPE)
9287 if (!p || p == void_list_node)
9290 error ("%qD must have an argument of class or "
9291 "enumerated type", decl);
9297 /* There are no restrictions on the arguments to an overloaded
9299 if (operator_code == CALL_EXPR)
9302 /* Warn about conversion operators that will never be used. */
9303 if (IDENTIFIER_TYPENAME_P (name)
9304 && ! DECL_TEMPLATE_INFO (decl)
9306 /* Warn only declaring the function; there is no need to
9307 warn again about out-of-class definitions. */
9308 && class_type == current_class_type)
9310 tree t = TREE_TYPE (name);
9311 int ref = (TREE_CODE (t) == REFERENCE_TYPE);
9312 const char *what = 0;
9315 t = TYPE_MAIN_VARIANT (TREE_TYPE (t));
9317 if (TREE_CODE (t) == VOID_TYPE)
9319 else if (class_type)
9321 if (t == class_type)
9322 what = "the same type";
9323 /* Don't force t to be complete here. */
9324 else if (IS_AGGR_TYPE (t)
9325 && COMPLETE_TYPE_P (t)
9326 && DERIVED_FROM_P (t, class_type))
9327 what = "a base class";
9331 warning (OPT_Wconversion, "conversion to %s%s will never use a type "
9332 "conversion operator",
9333 ref ? "a reference to " : "", what);
9336 if (operator_code == COND_EXPR)
9339 error ("ISO C++ prohibits overloading operator ?:");
9342 else if (ellipsis_p)
9344 error ("%qD must not have variable number of arguments", decl);
9347 else if (ambi_op_p (operator_code))
9350 /* We pick the one-argument operator codes by default, so
9351 we don't have to change anything. */
9353 else if (arity == 2)
9355 /* If we thought this was a unary operator, we now know
9356 it to be a binary operator. */
9357 switch (operator_code)
9360 operator_code = MULT_EXPR;
9364 operator_code = BIT_AND_EXPR;
9367 case UNARY_PLUS_EXPR:
9368 operator_code = PLUS_EXPR;
9372 operator_code = MINUS_EXPR;
9375 case PREINCREMENT_EXPR:
9376 operator_code = POSTINCREMENT_EXPR;
9379 case PREDECREMENT_EXPR:
9380 operator_code = POSTDECREMENT_EXPR;
9387 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
9389 if ((operator_code == POSTINCREMENT_EXPR
9390 || operator_code == POSTDECREMENT_EXPR)
9391 && ! processing_template_decl
9392 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes)), integer_type_node))
9395 error ("postfix %qD must take %<int%> as its argument",
9398 error ("postfix %qD must take %<int%> as its second "
9406 error ("%qD must take either zero or one argument", decl);
9408 error ("%qD must take either one or two arguments", decl);
9412 /* More Effective C++ rule 6. */
9414 && (operator_code == POSTINCREMENT_EXPR
9415 || operator_code == POSTDECREMENT_EXPR
9416 || operator_code == PREINCREMENT_EXPR
9417 || operator_code == PREDECREMENT_EXPR))
9419 tree arg = TREE_VALUE (argtypes);
9420 tree ret = TREE_TYPE (TREE_TYPE (decl));
9421 if (methodp || TREE_CODE (arg) == REFERENCE_TYPE)
9422 arg = TREE_TYPE (arg);
9423 arg = TYPE_MAIN_VARIANT (arg);
9424 if (operator_code == PREINCREMENT_EXPR
9425 || operator_code == PREDECREMENT_EXPR)
9427 if (TREE_CODE (ret) != REFERENCE_TYPE
9428 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret)),
9430 warning (OPT_Weffc__, "prefix %qD should return %qT", decl,
9431 build_reference_type (arg));
9435 if (!same_type_p (TYPE_MAIN_VARIANT (ret), arg))
9436 warning (OPT_Weffc__, "postfix %qD should return %qT", decl, arg);
9440 else if (unary_op_p (operator_code))
9445 error ("%qD must take %<void%>", decl);
9447 error ("%qD must take exactly one argument", decl);
9451 else /* if (binary_op_p (operator_code)) */
9456 error ("%qD must take exactly one argument", decl);
9458 error ("%qD must take exactly two arguments", decl);
9462 /* More Effective C++ rule 7. */
9464 && (operator_code == TRUTH_ANDIF_EXPR
9465 || operator_code == TRUTH_ORIF_EXPR
9466 || operator_code == COMPOUND_EXPR))
9467 warning (OPT_Weffc__, "user-defined %qD always evaluates both arguments",
9471 /* Effective C++ rule 23. */
9474 && !DECL_ASSIGNMENT_OPERATOR_P (decl)
9475 && (operator_code == PLUS_EXPR
9476 || operator_code == MINUS_EXPR
9477 || operator_code == TRUNC_DIV_EXPR
9478 || operator_code == MULT_EXPR
9479 || operator_code == TRUNC_MOD_EXPR)
9480 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl))) == REFERENCE_TYPE)
9481 warning (OPT_Weffc__, "%qD should return by value", decl);
9484 for (; argtypes && argtypes != void_list_node;
9485 argtypes = TREE_CHAIN (argtypes))
9486 if (TREE_PURPOSE (argtypes))
9488 TREE_PURPOSE (argtypes) = NULL_TREE;
9489 if (operator_code == POSTINCREMENT_EXPR
9490 || operator_code == POSTDECREMENT_EXPR)
9493 pedwarn ("%qD cannot have default arguments", decl);
9497 error ("%qD cannot have default arguments", decl);
9505 /* Return a string giving the keyword associate with CODE. */
9508 tag_name (enum tag_types code)
9527 /* Name lookup in an elaborated-type-specifier (after the keyword
9528 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
9529 elaborated-type-specifier is invalid, issue a diagnostic and return
9530 error_mark_node; otherwise, return the *_TYPE to which it referred.
9531 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
9534 check_elaborated_type_specifier (enum tag_types tag_code,
9536 bool allow_template_p)
9542 struct S { struct S *p; };
9544 name lookup will find the TYPE_DECL for the implicit "S::S"
9545 typedef. Adjust for that here. */
9546 if (DECL_SELF_REFERENCE_P (decl))
9547 decl = TYPE_NAME (TREE_TYPE (decl));
9549 type = TREE_TYPE (decl);
9551 /* Check TEMPLATE_TYPE_PARM first because DECL_IMPLICIT_TYPEDEF_P
9552 is false for this case as well. */
9553 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
9555 error ("using template type parameter %qT after %qs",
9556 type, tag_name (tag_code));
9557 return error_mark_node;
9561 If the identifier resolves to a typedef-name or a template
9562 type-parameter, the elaborated-type-specifier is ill-formed.
9564 In other words, the only legitimate declaration to use in the
9565 elaborated type specifier is the implicit typedef created when
9566 the type is declared. */
9567 else if (!DECL_IMPLICIT_TYPEDEF_P (decl)
9568 && tag_code != typename_type)
9570 error ("using typedef-name %qD after %qs", decl, tag_name (tag_code));
9571 error ("%q+D has a previous declaration here", decl);
9572 return error_mark_node;
9574 else if (TREE_CODE (type) != RECORD_TYPE
9575 && TREE_CODE (type) != UNION_TYPE
9576 && tag_code != enum_type
9577 && tag_code != typename_type)
9579 error ("%qT referred to as %qs", type, tag_name (tag_code));
9580 error ("%q+T has a previous declaration here", type);
9581 return error_mark_node;
9583 else if (TREE_CODE (type) != ENUMERAL_TYPE
9584 && tag_code == enum_type)
9586 error ("%qT referred to as enum", type);
9587 error ("%q+T has a previous declaration here", type);
9588 return error_mark_node;
9590 else if (!allow_template_p
9591 && TREE_CODE (type) == RECORD_TYPE
9592 && CLASSTYPE_IS_TEMPLATE (type))
9594 /* If a class template appears as elaborated type specifier
9595 without a template header such as:
9597 template <class T> class C {};
9598 void f(class C); // No template header here
9600 then the required template argument is missing. */
9601 error ("template argument required for %<%s %T%>",
9602 tag_name (tag_code),
9603 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type)));
9604 return error_mark_node;
9610 /* Lookup NAME in elaborate type specifier in scope according to
9611 SCOPE and issue diagnostics if necessary.
9612 Return *_TYPE node upon success, NULL_TREE when the NAME is not
9613 found, and ERROR_MARK_NODE for type error. */
9616 lookup_and_check_tag (enum tag_types tag_code, tree name,
9617 tag_scope scope, bool template_header_p)
9621 if (scope == ts_global)
9623 /* First try ordinary name lookup, ignoring hidden class name
9624 injected via friend declaration. */
9625 decl = lookup_name_prefer_type (name, 2);
9626 /* If that fails, the name will be placed in the smallest
9627 non-class, non-function-prototype scope according to 3.3.1/5.
9628 We may already have a hidden name declared as friend in this
9629 scope. So lookup again but not ignoring hidden names.
9630 If we find one, that name will be made visible rather than
9631 creating a new tag. */
9633 decl = lookup_type_scope (name, ts_within_enclosing_non_class);
9636 decl = lookup_type_scope (name, scope);
9638 if (decl && DECL_CLASS_TEMPLATE_P (decl))
9639 decl = DECL_TEMPLATE_RESULT (decl);
9641 if (decl && TREE_CODE (decl) == TYPE_DECL)
9643 /* Look for invalid nested type:
9647 if (scope == ts_current && DECL_SELF_REFERENCE_P (decl))
9649 error ("%qD has the same name as the class in which it is "
9652 return error_mark_node;
9655 /* Two cases we need to consider when deciding if a class
9656 template is allowed as an elaborated type specifier:
9657 1. It is a self reference to its own class.
9658 2. It comes with a template header.
9662 template <class T> class C {
9663 class C *c1; // DECL_SELF_REFERENCE_P is true
9666 template <class U> class C; // template_header_p is true
9667 template <class T> class C<T>::D {
9668 class C *c2; // DECL_SELF_REFERENCE_P is true
9671 t = check_elaborated_type_specifier (tag_code,
9674 | DECL_SELF_REFERENCE_P (decl));
9681 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
9682 Define the tag as a forward-reference if it is not defined.
9684 If a declaration is given, process it here, and report an error if
9685 multiple declarations are not identical.
9687 SCOPE is TS_CURRENT when this is also a definition. Only look in
9688 the current frame for the name (since C++ allows new names in any
9689 scope.) It is TS_WITHIN_ENCLOSING_NON_CLASS if this is a friend
9690 declaration. Only look beginning from the current scope outward up
9691 till the nearest non-class scope. Otherwise it is TS_GLOBAL.
9693 TEMPLATE_HEADER_P is true when this declaration is preceded by
9694 a set of template parameters. */
9697 xref_tag (enum tag_types tag_code, tree name,
9698 tag_scope scope, bool template_header_p)
9700 enum tree_code code;
9702 tree context = NULL_TREE;
9704 timevar_push (TV_NAME_LOOKUP);
9706 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
9718 code = ENUMERAL_TYPE;
9724 /* In case of anonymous name, xref_tag is only called to
9725 make type node and push name. Name lookup is not required. */
9726 if (ANON_AGGRNAME_P (name))
9729 t = lookup_and_check_tag (tag_code, name,
9730 scope, template_header_p);
9732 if (t == error_mark_node)
9733 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
9735 if (scope != ts_current && t && current_class_type
9736 && template_class_depth (current_class_type)
9737 && template_header_p)
9739 /* Since SCOPE is not TS_CURRENT, we are not looking at a
9740 definition of this tag. Since, in addition, we are currently
9741 processing a (member) template declaration of a template
9742 class, we must be very careful; consider:
9749 { template <class V>
9750 friend struct S1; };
9752 Here, the S2::S1 declaration should not be confused with the
9753 outer declaration. In particular, the inner version should
9754 have a template parameter of level 2, not level 1. This
9755 would be particularly important if the member declaration
9758 template <class V = U> friend struct S1;
9760 say, when we should tsubst into `U' when instantiating
9761 S2. On the other hand, when presented with:
9771 we must find the inner binding eventually. We
9772 accomplish this by making sure that the new type we
9773 create to represent this declaration has the right
9775 context = TYPE_CONTEXT (t);
9781 /* If no such tag is yet defined, create a forward-reference node
9782 and record it as the "definition".
9783 When a real declaration of this type is found,
9784 the forward-reference will be altered into a real type. */
9785 if (code == ENUMERAL_TYPE)
9787 error ("use of enum %q#D without previous declaration", name);
9788 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
9792 t = make_aggr_type (code);
9793 TYPE_CONTEXT (t) = context;
9794 t = pushtag (name, t, scope);
9799 if (template_header_p && IS_AGGR_TYPE (t))
9801 if (!redeclare_class_template (t, current_template_parms))
9802 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
9804 else if (!processing_template_decl
9806 && CLASSTYPE_IS_TEMPLATE (t))
9808 error ("redeclaration of %qT as a non-template", t);
9809 error ("previous declaration %q+D", t);
9810 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
9813 /* Make injected friend class visible. */
9814 if (scope != ts_within_enclosing_non_class
9815 && hidden_name_p (TYPE_NAME (t)))
9817 DECL_ANTICIPATED (TYPE_NAME (t)) = 0;
9818 DECL_FRIEND_P (TYPE_NAME (t)) = 0;
9820 if (TYPE_TEMPLATE_INFO (t))
9822 DECL_ANTICIPATED (TYPE_TI_TEMPLATE (t)) = 0;
9823 DECL_FRIEND_P (TYPE_TI_TEMPLATE (t)) = 0;
9828 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, t);
9832 xref_tag_from_type (tree old, tree id, tag_scope scope)
9834 enum tag_types tag_kind;
9836 if (TREE_CODE (old) == RECORD_TYPE)
9837 tag_kind = (CLASSTYPE_DECLARED_CLASS (old) ? class_type : record_type);
9839 tag_kind = union_type;
9841 if (id == NULL_TREE)
9842 id = TYPE_IDENTIFIER (old);
9844 return xref_tag (tag_kind, id, scope, false);
9847 /* Create the binfo hierarchy for REF with (possibly NULL) base list
9848 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
9849 access_* node, and the TREE_VALUE is the type of the base-class.
9850 Non-NULL TREE_TYPE indicates virtual inheritance.
9852 Returns true if the binfo hierarchy was successfully created,
9853 false if an error was detected. */
9856 xref_basetypes (tree ref, tree base_list)
9859 tree binfo, base_binfo;
9860 unsigned max_vbases = 0; /* Maximum direct & indirect virtual bases. */
9861 unsigned max_bases = 0; /* Maximum direct bases. */
9863 tree default_access;
9864 tree igo_prev; /* Track Inheritance Graph Order. */
9866 if (ref == error_mark_node)
9869 /* The base of a derived class is private by default, all others are
9871 default_access = (TREE_CODE (ref) == RECORD_TYPE
9872 && CLASSTYPE_DECLARED_CLASS (ref)
9873 ? access_private_node : access_public_node);
9875 /* First, make sure that any templates in base-classes are
9876 instantiated. This ensures that if we call ourselves recursively
9877 we do not get confused about which classes are marked and which
9882 tree basetype = TREE_VALUE (*basep);
9884 if (!(processing_template_decl && uses_template_parms (basetype))
9885 && !complete_type_or_else (basetype, NULL))
9886 /* An incomplete type. Remove it from the list. */
9887 *basep = TREE_CHAIN (*basep);
9891 if (TREE_TYPE (*basep))
9893 if (CLASS_TYPE_P (basetype))
9894 max_vbases += VEC_length (tree, CLASSTYPE_VBASECLASSES (basetype));
9895 basep = &TREE_CHAIN (*basep);
9899 TYPE_MARKED_P (ref) = 1;
9901 /* The binfo slot should be empty, unless this is an (ill-formed)
9903 gcc_assert (!TYPE_BINFO (ref) || TYPE_SIZE (ref));
9904 gcc_assert (TYPE_MAIN_VARIANT (ref) == ref);
9906 binfo = make_tree_binfo (max_bases);
9908 TYPE_BINFO (ref) = binfo;
9909 BINFO_OFFSET (binfo) = size_zero_node;
9910 BINFO_TYPE (binfo) = ref;
9914 BINFO_BASE_ACCESSES (binfo) = VEC_alloc (tree, gc, max_bases);
9915 /* An aggregate cannot have baseclasses. */
9916 CLASSTYPE_NON_AGGREGATE (ref) = 1;
9918 if (TREE_CODE (ref) == UNION_TYPE)
9920 error ("derived union %qT invalid", ref);
9927 if (TYPE_FOR_JAVA (ref))
9929 error ("Java class %qT cannot have multiple bases", ref);
9936 CLASSTYPE_VBASECLASSES (ref) = VEC_alloc (tree, gc, max_vbases);
9938 if (TYPE_FOR_JAVA (ref))
9940 error ("Java class %qT cannot have virtual bases", ref);
9945 for (igo_prev = binfo; base_list; base_list = TREE_CHAIN (base_list))
9947 tree access = TREE_PURPOSE (base_list);
9948 int via_virtual = TREE_TYPE (base_list) != NULL_TREE;
9949 tree basetype = TREE_VALUE (base_list);
9951 if (access == access_default_node)
9952 access = default_access;
9954 if (TREE_CODE (basetype) == TYPE_DECL)
9955 basetype = TREE_TYPE (basetype);
9956 if (TREE_CODE (basetype) != RECORD_TYPE
9957 && TREE_CODE (basetype) != TYPENAME_TYPE
9958 && TREE_CODE (basetype) != TEMPLATE_TYPE_PARM
9959 && TREE_CODE (basetype) != BOUND_TEMPLATE_TEMPLATE_PARM)
9961 error ("base type %qT fails to be a struct or class type",
9966 if (TYPE_FOR_JAVA (basetype) && (current_lang_depth () == 0))
9967 TYPE_FOR_JAVA (ref) = 1;
9969 base_binfo = NULL_TREE;
9970 if (CLASS_TYPE_P (basetype) && !dependent_type_p (basetype))
9972 base_binfo = TYPE_BINFO (basetype);
9973 /* The original basetype could have been a typedef'd type. */
9974 basetype = BINFO_TYPE (base_binfo);
9976 /* Inherit flags from the base. */
9977 TYPE_HAS_NEW_OPERATOR (ref)
9978 |= TYPE_HAS_NEW_OPERATOR (basetype);
9979 TYPE_HAS_ARRAY_NEW_OPERATOR (ref)
9980 |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype);
9981 TYPE_GETS_DELETE (ref) |= TYPE_GETS_DELETE (basetype);
9982 TYPE_HAS_CONVERSION (ref) |= TYPE_HAS_CONVERSION (basetype);
9983 CLASSTYPE_DIAMOND_SHAPED_P (ref)
9984 |= CLASSTYPE_DIAMOND_SHAPED_P (basetype);
9985 CLASSTYPE_REPEATED_BASE_P (ref)
9986 |= CLASSTYPE_REPEATED_BASE_P (basetype);
9989 /* We must do this test after we've seen through a typedef
9991 if (TYPE_MARKED_P (basetype))
9993 if (basetype == ref)
9994 error ("recursive type %qT undefined", basetype);
9996 error ("duplicate base type %qT invalid", basetype);
9999 TYPE_MARKED_P (basetype) = 1;
10001 base_binfo = copy_binfo (base_binfo, basetype, ref,
10002 &igo_prev, via_virtual);
10003 if (!BINFO_INHERITANCE_CHAIN (base_binfo))
10004 BINFO_INHERITANCE_CHAIN (base_binfo) = binfo;
10006 BINFO_BASE_APPEND (binfo, base_binfo);
10007 BINFO_BASE_ACCESS_APPEND (binfo, access);
10010 if (VEC_space (tree, CLASSTYPE_VBASECLASSES (ref), 1))
10011 /* If we have space in the vbase vector, we must have shared at
10012 least one of them, and are therefore diamond shaped. */
10013 CLASSTYPE_DIAMOND_SHAPED_P (ref) = 1;
10015 /* Unmark all the types. */
10016 for (i = 0; BINFO_BASE_ITERATE (binfo, i, base_binfo); i++)
10017 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
10018 TYPE_MARKED_P (ref) = 0;
10020 /* Now see if we have a repeated base type. */
10021 if (!CLASSTYPE_REPEATED_BASE_P (ref))
10023 for (base_binfo = binfo; base_binfo;
10024 base_binfo = TREE_CHAIN (base_binfo))
10026 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
10028 CLASSTYPE_REPEATED_BASE_P (ref) = 1;
10031 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 1;
10033 for (base_binfo = binfo; base_binfo;
10034 base_binfo = TREE_CHAIN (base_binfo))
10035 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
10036 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
10045 /* Begin compiling the definition of an enumeration type.
10047 Returns the type object, as yet incomplete.
10048 Also records info about it so that build_enumerator
10049 may be used to declare the individual values as they are read. */
10052 start_enum (tree name)
10056 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
10058 /* If this is the real definition for a previous forward reference,
10059 fill in the contents in the same object that used to be the
10060 forward reference. */
10062 enumtype = lookup_and_check_tag (enum_type, name,
10063 /*tag_scope=*/ts_current,
10064 /*template_header_p=*/false);
10066 if (enumtype != NULL_TREE && TREE_CODE (enumtype) == ENUMERAL_TYPE)
10068 error ("multiple definition of %q#T", enumtype);
10069 error ("%Jprevious definition here", TYPE_MAIN_DECL (enumtype));
10070 /* Clear out TYPE_VALUES, and start again. */
10071 TYPE_VALUES (enumtype) = NULL_TREE;
10075 /* In case of error, make a dummy enum to allow parsing to
10077 if (enumtype == error_mark_node)
10078 name = make_anon_name ();
10080 enumtype = make_node (ENUMERAL_TYPE);
10081 enumtype = pushtag (name, enumtype, /*tag_scope=*/ts_current);
10087 /* After processing and defining all the values of an enumeration type,
10088 install their decls in the enumeration type and finish it off.
10089 ENUMTYPE is the type object and VALUES a list of name-value pairs. */
10092 finish_enum (tree enumtype)
10101 bool use_short_enum;
10105 integer_type_kind itk;
10106 tree underlying_type = NULL_TREE;
10108 /* We built up the VALUES in reverse order. */
10109 TYPE_VALUES (enumtype) = nreverse (TYPE_VALUES (enumtype));
10111 /* For an enum defined in a template, just set the type of the values;
10112 all further processing is postponed until the template is
10113 instantiated. We need to set the type so that tsubst of a CONST_DECL
10115 if (processing_template_decl)
10117 for (values = TYPE_VALUES (enumtype);
10119 values = TREE_CHAIN (values))
10120 TREE_TYPE (TREE_VALUE (values)) = enumtype;
10121 if (at_function_scope_p ())
10122 add_stmt (build_min (TAG_DEFN, enumtype));
10126 /* Determine the minimum and maximum values of the enumerators. */
10127 if (TYPE_VALUES (enumtype))
10129 minnode = maxnode = NULL_TREE;
10131 for (values = TYPE_VALUES (enumtype);
10133 values = TREE_CHAIN (values))
10135 decl = TREE_VALUE (values);
10137 /* [dcl.enum]: Following the closing brace of an enum-specifier,
10138 each enumerator has the type of its enumeration. Prior to the
10139 closing brace, the type of each enumerator is the type of its
10140 initializing value. */
10141 TREE_TYPE (decl) = enumtype;
10143 /* Update the minimum and maximum values, if appropriate. */
10144 value = DECL_INITIAL (decl);
10145 if (value == error_mark_node)
10146 value = integer_zero_node;
10147 /* Figure out what the minimum and maximum values of the
10148 enumerators are. */
10150 minnode = maxnode = value;
10151 else if (tree_int_cst_lt (maxnode, value))
10153 else if (tree_int_cst_lt (value, minnode))
10160 If the enumerator-list is empty, the underlying type is as if
10161 the enumeration had a single enumerator with value 0. */
10162 minnode = maxnode = integer_zero_node;
10164 /* Compute the number of bits require to represent all values of the
10165 enumeration. We must do this before the type of MINNODE and
10166 MAXNODE are transformed, since min_precision relies on the
10167 TREE_TYPE of the value it is passed. */
10168 unsignedp = tree_int_cst_sgn (minnode) >= 0;
10169 lowprec = min_precision (minnode, unsignedp);
10170 highprec = min_precision (maxnode, unsignedp);
10171 precision = MAX (lowprec, highprec);
10173 /* Determine the underlying type of the enumeration.
10177 The underlying type of an enumeration is an integral type that
10178 can represent all the enumerator values defined in the
10179 enumeration. It is implementation-defined which integral type is
10180 used as the underlying type for an enumeration except that the
10181 underlying type shall not be larger than int unless the value of
10182 an enumerator cannot fit in an int or unsigned int.
10184 We use "int" or an "unsigned int" as the underlying type, even if
10185 a smaller integral type would work, unless the user has
10186 explicitly requested that we use the smallest possible type. The
10187 user can request that for all enumerations with a command line
10188 flag, or for just one enumeration with an attribute. */
10190 use_short_enum = flag_short_enums
10191 || lookup_attribute ("packed", TYPE_ATTRIBUTES (enumtype));
10193 for (itk = (use_short_enum ? itk_char : itk_int);
10197 underlying_type = integer_types[itk];
10198 if (TYPE_PRECISION (underlying_type) >= precision
10199 && TYPE_UNSIGNED (underlying_type) == unsignedp)
10202 if (itk == itk_none)
10206 IF no integral type can represent all the enumerator values, the
10207 enumeration is ill-formed. */
10208 error ("no integral type can represent all of the enumerator values "
10209 "for %qT", enumtype);
10210 precision = TYPE_PRECISION (long_long_integer_type_node);
10211 underlying_type = integer_types[itk_unsigned_long_long];
10214 /* Compute the minium and maximum values for the type.
10218 For an enumeration where emin is the smallest enumerator and emax
10219 is the largest, the values of the enumeration are the values of the
10220 underlying type in the range bmin to bmax, where bmin and bmax are,
10221 respectively, the smallest and largest values of the smallest bit-
10222 field that can store emin and emax. */
10224 /* The middle-end currently assumes that types with TYPE_PRECISION
10225 narrower than their underlying type are suitably zero or sign
10226 extended to fill their mode. g++ doesn't make these guarantees.
10227 Until the middle-end can represent such paradoxical types, we
10228 set the TYPE_PRECISION to the width of the underlying type. */
10229 TYPE_PRECISION (enumtype) = TYPE_PRECISION (underlying_type);
10231 set_min_and_max_values_for_integral_type (enumtype, precision, unsignedp);
10235 The value of sizeof() applied to an enumeration type, an object
10236 of an enumeration type, or an enumerator, is the value of sizeof()
10237 applied to the underlying type. */
10238 TYPE_SIZE (enumtype) = TYPE_SIZE (underlying_type);
10239 TYPE_SIZE_UNIT (enumtype) = TYPE_SIZE_UNIT (underlying_type);
10240 TYPE_MODE (enumtype) = TYPE_MODE (underlying_type);
10241 TYPE_ALIGN (enumtype) = TYPE_ALIGN (underlying_type);
10242 TYPE_USER_ALIGN (enumtype) = TYPE_USER_ALIGN (underlying_type);
10243 TYPE_UNSIGNED (enumtype) = TYPE_UNSIGNED (underlying_type);
10245 /* Convert each of the enumerators to the type of the underlying
10246 type of the enumeration. */
10247 for (values = TYPE_VALUES (enumtype); values; values = TREE_CHAIN (values))
10249 location_t saved_location;
10251 decl = TREE_VALUE (values);
10252 saved_location = input_location;
10253 input_location = DECL_SOURCE_LOCATION (decl);
10254 value = perform_implicit_conversion (underlying_type,
10255 DECL_INITIAL (decl));
10256 input_location = saved_location;
10258 /* Do not clobber shared ints. */
10259 value = copy_node (value);
10261 TREE_TYPE (value) = enumtype;
10262 DECL_INITIAL (decl) = value;
10263 TREE_VALUE (values) = value;
10266 /* Fix up all variant types of this enum type. */
10267 for (t = TYPE_MAIN_VARIANT (enumtype); t; t = TYPE_NEXT_VARIANT (t))
10269 TYPE_VALUES (t) = TYPE_VALUES (enumtype);
10270 TYPE_MIN_VALUE (t) = TYPE_MIN_VALUE (enumtype);
10271 TYPE_MAX_VALUE (t) = TYPE_MAX_VALUE (enumtype);
10272 TYPE_SIZE (t) = TYPE_SIZE (enumtype);
10273 TYPE_SIZE_UNIT (t) = TYPE_SIZE_UNIT (enumtype);
10274 TYPE_MODE (t) = TYPE_MODE (enumtype);
10275 TYPE_PRECISION (t) = TYPE_PRECISION (enumtype);
10276 TYPE_ALIGN (t) = TYPE_ALIGN (enumtype);
10277 TYPE_USER_ALIGN (t) = TYPE_USER_ALIGN (enumtype);
10278 TYPE_UNSIGNED (t) = TYPE_UNSIGNED (enumtype);
10281 /* Finish debugging output for this type. */
10282 rest_of_type_compilation (enumtype, namespace_bindings_p ());
10285 /* Build and install a CONST_DECL for an enumeration constant of the
10286 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
10287 Assignment of sequential values by default is handled here. */
10290 build_enumerator (tree name, tree value, tree enumtype)
10296 /* If the VALUE was erroneous, pretend it wasn't there; that will
10297 result in the enum being assigned the next value in sequence. */
10298 if (value == error_mark_node)
10301 /* Remove no-op casts from the value. */
10303 STRIP_TYPE_NOPS (value);
10305 if (! processing_template_decl)
10307 /* Validate and default VALUE. */
10308 if (value != NULL_TREE)
10310 value = integral_constant_value (value);
10312 if (TREE_CODE (value) == INTEGER_CST)
10314 value = perform_integral_promotions (value);
10315 constant_expression_warning (value);
10319 error ("enumerator value for %qD is not an integer constant", name);
10324 /* Default based on previous value. */
10325 if (value == NULL_TREE)
10327 if (TYPE_VALUES (enumtype))
10330 unsigned HOST_WIDE_INT lo;
10334 /* The next value is the previous value plus one. We can
10335 safely assume that the previous value is an INTEGER_CST.
10336 add_double doesn't know the type of the target expression,
10337 so we must check with int_fits_type_p as well. */
10338 prev_value = DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype)));
10339 overflowed = add_double (TREE_INT_CST_LOW (prev_value),
10340 TREE_INT_CST_HIGH (prev_value),
10342 value = build_int_cst_wide (TREE_TYPE (prev_value), lo, hi);
10343 overflowed |= !int_fits_type_p (value, TREE_TYPE (prev_value));
10347 error ("overflow in enumeration values at %qD", name);
10348 value = error_mark_node;
10352 value = integer_zero_node;
10355 /* Remove no-op casts from the value. */
10356 STRIP_TYPE_NOPS (value);
10359 /* C++ associates enums with global, function, or class declarations. */
10360 context = current_scope ();
10362 /* Build the actual enumeration constant. Note that the enumeration
10363 constants have the type of their initializers until the
10364 enumeration is complete:
10368 Following the closing brace of an enum-specifier, each enumer-
10369 ator has the type of its enumeration. Prior to the closing
10370 brace, the type of each enumerator is the type of its
10371 initializing value.
10373 In finish_enum we will reset the type. Of course, if we're
10374 processing a template, there may be no value. */
10375 type = value ? TREE_TYPE (value) : NULL_TREE;
10377 if (context && context == current_class_type)
10378 /* This enum declaration is local to the class. We need the full
10379 lang_decl so that we can record DECL_CLASS_CONTEXT, for example. */
10380 decl = build_lang_decl (CONST_DECL, name, type);
10382 /* It's a global enum, or it's local to a function. (Note local to
10383 a function could mean local to a class method. */
10384 decl = build_decl (CONST_DECL, name, type);
10386 DECL_CONTEXT (decl) = FROB_CONTEXT (context);
10387 TREE_CONSTANT (decl) = 1;
10388 TREE_INVARIANT (decl) = 1;
10389 TREE_READONLY (decl) = 1;
10390 DECL_INITIAL (decl) = value;
10392 if (context && context == current_class_type)
10393 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
10394 on the TYPE_FIELDS list for `S'. (That's so that you can say
10395 things like `S::i' later.) */
10396 finish_member_declaration (decl);
10400 /* Add this enumeration constant to the list for this type. */
10401 TYPE_VALUES (enumtype) = tree_cons (name, decl, TYPE_VALUES (enumtype));
10405 /* We're defining DECL. Make sure that it's type is OK. */
10408 check_function_type (tree decl, tree current_function_parms)
10410 tree fntype = TREE_TYPE (decl);
10411 tree return_type = complete_type (TREE_TYPE (fntype));
10413 /* In a function definition, arg types must be complete. */
10414 require_complete_types_for_parms (current_function_parms);
10416 if (dependent_type_p (return_type))
10418 if (!COMPLETE_OR_VOID_TYPE_P (return_type))
10420 tree args = TYPE_ARG_TYPES (fntype);
10422 error ("return type %q#T is incomplete", return_type);
10424 /* Make it return void instead. */
10425 if (TREE_CODE (fntype) == METHOD_TYPE)
10426 fntype = build_method_type_directly (TREE_TYPE (TREE_VALUE (args)),
10428 TREE_CHAIN (args));
10430 fntype = build_function_type (void_type_node, args);
10432 = build_exception_variant (fntype,
10433 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (decl)));
10436 abstract_virtuals_error (decl, TREE_TYPE (fntype));
10439 /* Create the FUNCTION_DECL for a function definition.
10440 DECLSPECS and DECLARATOR are the parts of the declaration;
10441 they describe the function's name and the type it returns,
10442 but twisted together in a fashion that parallels the syntax of C.
10444 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
10445 DECLARATOR is really the DECL for the function we are about to
10446 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
10447 indicating that the function is an inline defined in-class.
10449 This function creates a binding context for the function body
10450 as well as setting up the FUNCTION_DECL in current_function_decl.
10452 For C++, we must first check whether that datum makes any sense.
10453 For example, "class A local_a(1,2);" means that variable local_a
10454 is an aggregate of type A, which should have a constructor
10455 applied to it with the argument list [1, 2].
10457 On entry, DECL_INITIAL (decl1) should be NULL_TREE or error_mark_node,
10458 or may be a BLOCK if the function has been defined previously
10459 in this translation unit. On exit, DECL_INITIAL (decl1) will be
10460 error_mark_node if the function has never been defined, or
10461 a BLOCK if the function has been defined somewhere. */
10464 start_preparsed_function (tree decl1, tree attrs, int flags)
10466 tree ctype = NULL_TREE;
10469 int doing_friend = 0;
10470 struct cp_binding_level *bl;
10471 tree current_function_parms;
10472 struct c_fileinfo *finfo
10473 = get_fileinfo (LOCATION_FILE (DECL_SOURCE_LOCATION (decl1)));
10474 bool honor_interface;
10476 /* Sanity check. */
10477 gcc_assert (TREE_CODE (TREE_VALUE (void_list_node)) == VOID_TYPE);
10478 gcc_assert (TREE_CHAIN (void_list_node) == NULL_TREE);
10480 fntype = TREE_TYPE (decl1);
10481 if (TREE_CODE (fntype) == METHOD_TYPE)
10482 ctype = TYPE_METHOD_BASETYPE (fntype);
10484 /* ISO C++ 11.4/5. A friend function defined in a class is in
10485 the (lexical) scope of the class in which it is defined. */
10486 if (!ctype && DECL_FRIEND_P (decl1))
10488 ctype = DECL_FRIEND_CONTEXT (decl1);
10490 /* CTYPE could be null here if we're dealing with a template;
10491 for example, `inline friend float foo()' inside a template
10492 will have no CTYPE set. */
10493 if (ctype && TREE_CODE (ctype) != RECORD_TYPE)
10499 if (DECL_DECLARED_INLINE_P (decl1)
10500 && lookup_attribute ("noinline", attrs))
10501 warning (0, "inline function %q+D given attribute noinline", decl1);
10503 if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1))
10504 /* This is a constructor, we must ensure that any default args
10505 introduced by this definition are propagated to the clones
10506 now. The clones are used directly in overload resolution. */
10507 adjust_clone_args (decl1);
10509 /* Sometimes we don't notice that a function is a static member, and
10510 build a METHOD_TYPE for it. Fix that up now. */
10511 if (ctype != NULL_TREE && DECL_STATIC_FUNCTION_P (decl1)
10512 && TREE_CODE (TREE_TYPE (decl1)) == METHOD_TYPE)
10514 revert_static_member_fn (decl1);
10518 /* Set up current_class_type, and enter the scope of the class, if
10521 push_nested_class (ctype);
10522 else if (DECL_STATIC_FUNCTION_P (decl1))
10523 push_nested_class (DECL_CONTEXT (decl1));
10525 /* Now that we have entered the scope of the class, we must restore
10526 the bindings for any template parameters surrounding DECL1, if it
10527 is an inline member template. (Order is important; consider the
10528 case where a template parameter has the same name as a field of
10529 the class.) It is not until after this point that
10530 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
10531 if (flags & SF_INCLASS_INLINE)
10532 maybe_begin_member_template_processing (decl1);
10534 /* Effective C++ rule 15. */
10536 && DECL_OVERLOADED_OPERATOR_P (decl1) == NOP_EXPR
10537 && TREE_CODE (TREE_TYPE (fntype)) == VOID_TYPE)
10538 warning (OPT_Weffc__, "%<operator=%> should return a reference to %<*this%>");
10540 /* Make the init_value nonzero so pushdecl knows this is not tentative.
10541 error_mark_node is replaced below (in poplevel) with the BLOCK. */
10542 if (!DECL_INITIAL (decl1))
10543 DECL_INITIAL (decl1) = error_mark_node;
10545 /* This function exists in static storage.
10546 (This does not mean `static' in the C sense!) */
10547 TREE_STATIC (decl1) = 1;
10549 /* We must call push_template_decl after current_class_type is set
10550 up. (If we are processing inline definitions after exiting a
10551 class scope, current_class_type will be NULL_TREE until set above
10552 by push_nested_class.) */
10553 if (processing_template_decl)
10555 /* FIXME: Handle error_mark_node more gracefully. */
10556 tree newdecl1 = push_template_decl (decl1);
10557 if (newdecl1 != error_mark_node)
10561 /* We are now in the scope of the function being defined. */
10562 current_function_decl = decl1;
10564 /* Save the parm names or decls from this function's declarator
10565 where store_parm_decls will find them. */
10566 current_function_parms = DECL_ARGUMENTS (decl1);
10568 /* Make sure the parameter and return types are reasonable. When
10569 you declare a function, these types can be incomplete, but they
10570 must be complete when you define the function. */
10571 check_function_type (decl1, current_function_parms);
10573 /* Build the return declaration for the function. */
10574 restype = TREE_TYPE (fntype);
10575 /* Promote the value to int before returning it. */
10576 if (c_promoting_integer_type_p (restype))
10577 restype = type_promotes_to (restype);
10578 if (DECL_RESULT (decl1) == NULL_TREE)
10582 resdecl = build_decl (RESULT_DECL, 0, TYPE_MAIN_VARIANT (restype));
10583 DECL_ARTIFICIAL (resdecl) = 1;
10584 DECL_IGNORED_P (resdecl) = 1;
10585 DECL_RESULT (decl1) = resdecl;
10587 cp_apply_type_quals_to_decl (cp_type_quals (restype), resdecl);
10590 /* Let the user know we're compiling this function. */
10591 announce_function (decl1);
10593 /* Record the decl so that the function name is defined.
10594 If we already have a decl for this name, and it is a FUNCTION_DECL,
10595 use the old decl. */
10596 if (!processing_template_decl && !(flags & SF_PRE_PARSED))
10598 /* A specialization is not used to guide overload resolution. */
10599 if (!DECL_FUNCTION_MEMBER_P (decl1)
10600 && !(DECL_USE_TEMPLATE (decl1) &&
10601 PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl1))))
10603 tree olddecl = pushdecl (decl1);
10605 if (olddecl == error_mark_node)
10606 /* If something went wrong when registering the declaration,
10607 use DECL1; we have to have a FUNCTION_DECL to use when
10608 parsing the body of the function. */
10612 /* Otherwise, OLDDECL is either a previous declaration
10613 of the same function or DECL1 itself. */
10615 if (warn_missing_declarations
10616 && olddecl == decl1
10617 && !DECL_MAIN_P (decl1)
10618 && TREE_PUBLIC (decl1)
10619 && !DECL_DECLARED_INLINE_P (decl1))
10623 /* Check whether DECL1 is in an anonymous
10625 for (context = DECL_CONTEXT (decl1);
10627 context = DECL_CONTEXT (context))
10629 if (TREE_CODE (context) == NAMESPACE_DECL
10630 && DECL_NAME (context) == NULL_TREE)
10634 if (context == NULL)
10635 warning (OPT_Wmissing_declarations,
10636 "no previous declaration for %q+D", decl1);
10644 /* We need to set the DECL_CONTEXT. */
10645 if (!DECL_CONTEXT (decl1) && DECL_TEMPLATE_INFO (decl1))
10646 DECL_CONTEXT (decl1) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1));
10648 fntype = TREE_TYPE (decl1);
10650 /* If #pragma weak applies, mark the decl appropriately now.
10651 The pragma only applies to global functions. Because
10652 determining whether or not the #pragma applies involves
10653 computing the mangled name for the declaration, we cannot
10654 apply the pragma until after we have merged this declaration
10655 with any previous declarations; if the original declaration
10656 has a linkage specification, that specification applies to
10657 the definition as well, and may affect the mangled name. */
10658 if (!DECL_CONTEXT (decl1))
10659 maybe_apply_pragma_weak (decl1);
10662 /* Reset this in case the call to pushdecl changed it. */
10663 current_function_decl = decl1;
10665 gcc_assert (DECL_INITIAL (decl1));
10667 /* This function may already have been parsed, in which case just
10668 return; our caller will skip over the body without parsing. */
10669 if (DECL_INITIAL (decl1) != error_mark_node)
10672 /* Initialize RTL machinery. We cannot do this until
10673 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
10674 even when processing a template; this is how we get
10675 CFUN set up, and our per-function variables initialized.
10676 FIXME factor out the non-RTL stuff. */
10677 bl = current_binding_level;
10678 allocate_struct_function (decl1);
10679 current_binding_level = bl;
10681 /* Even though we're inside a function body, we still don't want to
10682 call expand_expr to calculate the size of a variable-sized array.
10683 We haven't necessarily assigned RTL to all variables yet, so it's
10684 not safe to try to expand expressions involving them. */
10685 cfun->x_dont_save_pending_sizes_p = 1;
10687 /* Start the statement-tree, start the tree now. */
10688 DECL_SAVED_TREE (decl1) = push_stmt_list ();
10690 /* If we are (erroneously) defining a function that we have already
10691 defined before, wipe out what we knew before. */
10692 if (!DECL_PENDING_INLINE_P (decl1))
10693 DECL_SAVED_FUNCTION_DATA (decl1) = NULL;
10695 if (ctype && !doing_friend && !DECL_STATIC_FUNCTION_P (decl1))
10697 /* We know that this was set up by `grokclassfn'. We do not
10698 wait until `store_parm_decls', since evil parse errors may
10699 never get us to that point. Here we keep the consistency
10700 between `current_class_type' and `current_class_ptr'. */
10701 tree t = DECL_ARGUMENTS (decl1);
10703 gcc_assert (t != NULL_TREE && TREE_CODE (t) == PARM_DECL);
10704 gcc_assert (TREE_CODE (TREE_TYPE (t)) == POINTER_TYPE);
10706 cp_function_chain->x_current_class_ref
10707 = build_indirect_ref (t, NULL);
10708 cp_function_chain->x_current_class_ptr = t;
10710 /* Constructors and destructors need to know whether they're "in
10711 charge" of initializing virtual base classes. */
10712 t = TREE_CHAIN (t);
10713 if (DECL_HAS_IN_CHARGE_PARM_P (decl1))
10715 current_in_charge_parm = t;
10716 t = TREE_CHAIN (t);
10718 if (DECL_HAS_VTT_PARM_P (decl1))
10720 gcc_assert (DECL_NAME (t) == vtt_parm_identifier);
10721 current_vtt_parm = t;
10725 honor_interface = (!DECL_TEMPLATE_INSTANTIATION (decl1)
10726 /* Implicitly-defined methods (like the
10727 destructor for a class in which no destructor
10728 is explicitly declared) must not be defined
10729 until their definition is needed. So, we
10730 ignore interface specifications for
10731 compiler-generated functions. */
10732 && !DECL_ARTIFICIAL (decl1));
10734 if (DECL_INTERFACE_KNOWN (decl1))
10736 tree ctx = decl_function_context (decl1);
10738 if (DECL_NOT_REALLY_EXTERN (decl1))
10739 DECL_EXTERNAL (decl1) = 0;
10741 if (ctx != NULL_TREE && DECL_DECLARED_INLINE_P (ctx)
10742 && TREE_PUBLIC (ctx))
10743 /* This is a function in a local class in an extern inline
10745 comdat_linkage (decl1);
10747 /* If this function belongs to an interface, it is public.
10748 If it belongs to someone else's interface, it is also external.
10749 This only affects inlines and template instantiations. */
10750 else if (!finfo->interface_unknown && honor_interface)
10752 if (DECL_DECLARED_INLINE_P (decl1)
10753 || DECL_TEMPLATE_INSTANTIATION (decl1)
10754 || processing_template_decl)
10756 DECL_EXTERNAL (decl1)
10757 = (finfo->interface_only
10758 || (DECL_DECLARED_INLINE_P (decl1)
10759 && ! flag_implement_inlines
10760 && !DECL_VINDEX (decl1)));
10762 /* For WIN32 we also want to put these in linkonce sections. */
10763 maybe_make_one_only (decl1);
10766 DECL_EXTERNAL (decl1) = 0;
10767 DECL_INTERFACE_KNOWN (decl1) = 1;
10768 /* If this function is in an interface implemented in this file,
10769 make sure that the backend knows to emit this function
10771 if (!DECL_EXTERNAL (decl1))
10772 mark_needed (decl1);
10774 else if (finfo->interface_unknown && finfo->interface_only
10775 && honor_interface)
10777 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
10778 interface, we will have both finfo->interface_unknown and
10779 finfo->interface_only set. In that case, we don't want to
10780 use the normal heuristics because someone will supply a
10781 #pragma implementation elsewhere, and deducing it here would
10782 produce a conflict. */
10783 comdat_linkage (decl1);
10784 DECL_EXTERNAL (decl1) = 0;
10785 DECL_INTERFACE_KNOWN (decl1) = 1;
10786 DECL_DEFER_OUTPUT (decl1) = 1;
10790 /* This is a definition, not a reference.
10791 So clear DECL_EXTERNAL. */
10792 DECL_EXTERNAL (decl1) = 0;
10794 if ((DECL_DECLARED_INLINE_P (decl1)
10795 || DECL_TEMPLATE_INSTANTIATION (decl1))
10796 && ! DECL_INTERFACE_KNOWN (decl1)
10797 /* Don't try to defer nested functions for now. */
10798 && ! decl_function_context (decl1))
10799 DECL_DEFER_OUTPUT (decl1) = 1;
10801 DECL_INTERFACE_KNOWN (decl1) = 1;
10804 /* Determine the ELF visibility attribute for the function. We must not
10805 do this before calling "pushdecl", as we must allow "duplicate_decls"
10806 to merge any attributes appropriately. We also need to wait until
10808 if (!DECL_CLONED_FUNCTION_P (decl1))
10809 determine_visibility (decl1);
10811 begin_scope (sk_function_parms, decl1);
10815 if (DECL_DESTRUCTOR_P (decl1)
10816 || (DECL_CONSTRUCTOR_P (decl1)
10817 && targetm.cxx.cdtor_returns_this ()))
10819 cdtor_label = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
10820 DECL_CONTEXT (cdtor_label) = current_function_decl;
10823 start_fname_decls ();
10825 store_parm_decls (current_function_parms);
10829 /* Like start_preparsed_function, except that instead of a
10830 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
10832 Returns 1 on success. If the DECLARATOR is not suitable for a function
10833 (it defines a datum instead), we return 0, which tells
10834 yyparse to report a parse error. */
10837 start_function (cp_decl_specifier_seq *declspecs,
10838 const cp_declarator *declarator,
10843 decl1 = grokdeclarator (declarator, declspecs, FUNCDEF, 1, &attrs);
10844 /* If the declarator is not suitable for a function definition,
10845 cause a syntax error. */
10846 if (decl1 == NULL_TREE || TREE_CODE (decl1) != FUNCTION_DECL)
10849 if (DECL_MAIN_P (decl1))
10850 /* main must return int. grokfndecl should have corrected it
10851 (and issued a diagnostic) if the user got it wrong. */
10852 gcc_assert (same_type_p (TREE_TYPE (TREE_TYPE (decl1)),
10853 integer_type_node));
10855 start_preparsed_function (decl1, attrs, /*flags=*/SF_DEFAULT);
10860 /* Returns true iff an EH_SPEC_BLOCK should be created in the body of
10864 use_eh_spec_block (tree fn)
10866 return (flag_exceptions && flag_enforce_eh_specs
10867 && !processing_template_decl
10868 && TYPE_RAISES_EXCEPTIONS (TREE_TYPE (fn))
10869 /* We insert the EH_SPEC_BLOCK only in the original
10870 function; then, it is copied automatically to the
10872 && !DECL_CLONED_FUNCTION_P (fn)
10873 /* Implicitly-generated constructors and destructors have
10874 exception specifications. However, those specifications
10875 are the union of the possible exceptions specified by the
10876 constructors/destructors for bases and members, so no
10877 unallowed exception will ever reach this function. By
10878 not creating the EH_SPEC_BLOCK we save a little memory,
10879 and we avoid spurious warnings about unreachable
10881 && !DECL_ARTIFICIAL (fn));
10884 /* Store the parameter declarations into the current function declaration.
10885 This is called after parsing the parameter declarations, before
10886 digesting the body of the function.
10888 Also install to binding contour return value identifier, if any. */
10891 store_parm_decls (tree current_function_parms)
10893 tree fndecl = current_function_decl;
10896 /* This is a chain of any other decls that came in among the parm
10897 declarations. If a parm is declared with enum {foo, bar} x;
10898 then CONST_DECLs for foo and bar are put here. */
10899 tree nonparms = NULL_TREE;
10901 if (current_function_parms)
10903 /* This case is when the function was defined with an ANSI prototype.
10904 The parms already have decls, so we need not do anything here
10905 except record them as in effect
10906 and complain if any redundant old-style parm decls were written. */
10908 tree specparms = current_function_parms;
10911 /* Must clear this because it might contain TYPE_DECLs declared
10913 current_binding_level->names = NULL;
10915 /* If we're doing semantic analysis, then we'll call pushdecl
10916 for each of these. We must do them in reverse order so that
10917 they end in the correct forward order. */
10918 specparms = nreverse (specparms);
10920 for (parm = specparms; parm; parm = next)
10922 next = TREE_CHAIN (parm);
10923 if (TREE_CODE (parm) == PARM_DECL)
10925 if (DECL_NAME (parm) == NULL_TREE
10926 || TREE_CODE (parm) != VOID_TYPE)
10929 error ("parameter %qD declared void", parm);
10933 /* If we find an enum constant or a type tag,
10934 put it aside for the moment. */
10935 TREE_CHAIN (parm) = NULL_TREE;
10936 nonparms = chainon (nonparms, parm);
10940 /* Get the decls in their original chain order and record in the
10941 function. This is all and only the PARM_DECLs that were
10942 pushed into scope by the loop above. */
10943 DECL_ARGUMENTS (fndecl) = getdecls ();
10946 DECL_ARGUMENTS (fndecl) = NULL_TREE;
10948 /* Now store the final chain of decls for the arguments
10949 as the decl-chain of the current lexical scope.
10950 Put the enumerators in as well, at the front so that
10951 DECL_ARGUMENTS is not modified. */
10952 current_binding_level->names = chainon (nonparms, DECL_ARGUMENTS (fndecl));
10954 if (use_eh_spec_block (current_function_decl))
10955 current_eh_spec_block = begin_eh_spec_block ();
10959 /* We have finished doing semantic analysis on DECL, but have not yet
10960 generated RTL for its body. Save away our current state, so that
10961 when we want to generate RTL later we know what to do. */
10964 save_function_data (tree decl)
10966 struct language_function *f;
10968 /* Save the language-specific per-function data so that we can
10969 get it back when we really expand this function. */
10970 gcc_assert (!DECL_PENDING_INLINE_P (decl));
10973 f = GGC_NEW (struct language_function);
10974 memcpy (f, cp_function_chain, sizeof (struct language_function));
10975 DECL_SAVED_FUNCTION_DATA (decl) = f;
10977 /* Clear out the bits we don't need. */
10978 f->base.x_stmt_tree.x_cur_stmt_list = NULL_TREE;
10979 f->bindings = NULL;
10980 f->x_local_names = NULL;
10984 /* Set the return value of the constructor (if present). */
10987 finish_constructor_body (void)
10992 if (targetm.cxx.cdtor_returns_this ())
10994 /* Any return from a constructor will end up here. */
10995 add_stmt (build_stmt (LABEL_EXPR, cdtor_label));
10997 val = DECL_ARGUMENTS (current_function_decl);
10998 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
10999 DECL_RESULT (current_function_decl), val);
11000 /* Return the address of the object. */
11001 exprstmt = build_stmt (RETURN_EXPR, val);
11002 add_stmt (exprstmt);
11006 /* Do all the processing for the beginning of a destructor; set up the
11007 vtable pointers and cleanups for bases and members. */
11010 begin_destructor_body (void)
11012 tree compound_stmt;
11014 /* If the CURRENT_CLASS_TYPE is incomplete, we will have already
11015 issued an error message. We still want to try to process the
11016 body of the function, but initialize_vtbl_ptrs will crash if
11017 TYPE_BINFO is NULL. */
11018 if (COMPLETE_TYPE_P (current_class_type))
11020 compound_stmt = begin_compound_stmt (0);
11021 /* Make all virtual function table pointers in non-virtual base
11022 classes point to CURRENT_CLASS_TYPE's virtual function
11024 initialize_vtbl_ptrs (current_class_ptr);
11025 finish_compound_stmt (compound_stmt);
11027 /* And insert cleanups for our bases and members so that they
11028 will be properly destroyed if we throw. */
11029 push_base_cleanups ();
11033 /* At the end of every destructor we generate code to delete the object if
11034 necessary. Do that now. */
11037 finish_destructor_body (void)
11041 /* Any return from a destructor will end up here; that way all base
11042 and member cleanups will be run when the function returns. */
11043 add_stmt (build_stmt (LABEL_EXPR, cdtor_label));
11045 /* In a virtual destructor, we must call delete. */
11046 if (DECL_VIRTUAL_P (current_function_decl))
11049 tree virtual_size = cxx_sizeof (current_class_type);
11053 At the point of definition of a virtual destructor (including
11054 an implicit definition), non-placement operator delete shall
11055 be looked up in the scope of the destructor's class and if
11056 found shall be accessible and unambiguous. */
11057 exprstmt = build_op_delete_call(DELETE_EXPR, current_class_ptr,
11059 /*global_p=*/false,
11060 /*placement=*/NULL_TREE,
11061 /*alloc_fn=*/NULL_TREE);
11063 if_stmt = begin_if_stmt ();
11064 finish_if_stmt_cond (build2 (BIT_AND_EXPR, integer_type_node,
11065 current_in_charge_parm,
11068 finish_expr_stmt (exprstmt);
11069 finish_then_clause (if_stmt);
11070 finish_if_stmt (if_stmt);
11073 if (targetm.cxx.cdtor_returns_this ())
11077 val = DECL_ARGUMENTS (current_function_decl);
11078 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
11079 DECL_RESULT (current_function_decl), val);
11080 /* Return the address of the object. */
11081 exprstmt = build_stmt (RETURN_EXPR, val);
11082 add_stmt (exprstmt);
11086 /* Do the necessary processing for the beginning of a function body, which
11087 in this case includes member-initializers, but not the catch clauses of
11088 a function-try-block. Currently, this means opening a binding level
11089 for the member-initializers (in a ctor) and member cleanups (in a dtor). */
11092 begin_function_body (void)
11096 if (! FUNCTION_NEEDS_BODY_BLOCK (current_function_decl))
11099 if (processing_template_decl)
11100 /* Do nothing now. */;
11102 /* Always keep the BLOCK node associated with the outermost pair of
11103 curly braces of a function. These are needed for correct
11104 operation of dwarfout.c. */
11105 keep_next_level (true);
11107 stmt = begin_compound_stmt (BCS_FN_BODY);
11109 if (processing_template_decl)
11110 /* Do nothing now. */;
11111 else if (DECL_DESTRUCTOR_P (current_function_decl))
11112 begin_destructor_body ();
11117 /* Do the processing for the end of a function body. Currently, this means
11118 closing out the cleanups for fully-constructed bases and members, and in
11119 the case of the destructor, deleting the object if desired. Again, this
11120 is only meaningful for [cd]tors, since they are the only functions where
11121 there is a significant distinction between the main body and any
11122 function catch clauses. Handling, say, main() return semantics here
11123 would be wrong, as flowing off the end of a function catch clause for
11124 main() would also need to return 0. */
11127 finish_function_body (tree compstmt)
11129 if (compstmt == NULL_TREE)
11132 /* Close the block. */
11133 finish_compound_stmt (compstmt);
11135 if (processing_template_decl)
11136 /* Do nothing now. */;
11137 else if (DECL_CONSTRUCTOR_P (current_function_decl))
11138 finish_constructor_body ();
11139 else if (DECL_DESTRUCTOR_P (current_function_decl))
11140 finish_destructor_body ();
11143 /* Given a function, returns the BLOCK corresponding to the outermost level
11144 of curly braces, skipping the artificial block created for constructor
11148 outer_curly_brace_block (tree fndecl)
11150 tree block = BLOCK_SUBBLOCKS (DECL_INITIAL (fndecl));
11151 if (FUNCTION_NEEDS_BODY_BLOCK (current_function_decl))
11152 /* Skip the artificial function body block. */
11153 block = BLOCK_SUBBLOCKS (block);
11157 /* Finish up a function declaration and compile that function
11158 all the way to assembler language output. The free the storage
11159 for the function definition.
11161 FLAGS is a bitwise or of the following values:
11163 We just finished processing the body of an in-class inline
11164 function definition. (This processing will have taken place
11165 after the class definition is complete.) */
11168 finish_function (int flags)
11170 tree fndecl = current_function_decl;
11171 tree fntype, ctype = NULL_TREE;
11172 int inclass_inline = (flags & 2) != 0;
11175 /* When we get some parse errors, we can end up without a
11176 current_function_decl, so cope. */
11177 if (fndecl == NULL_TREE)
11178 return error_mark_node;
11180 if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fndecl)
11181 && DECL_VIRTUAL_P (fndecl)
11182 && !processing_template_decl)
11184 tree fnclass = DECL_CONTEXT (fndecl);
11185 if (fndecl == CLASSTYPE_KEY_METHOD (fnclass))
11186 keyed_classes = tree_cons (NULL_TREE, fnclass, keyed_classes);
11189 nested = function_depth > 1;
11190 fntype = TREE_TYPE (fndecl);
11192 /* TREE_READONLY (fndecl) = 1;
11193 This caused &foo to be of type ptr-to-const-function
11194 which then got a warning when stored in a ptr-to-function variable. */
11196 gcc_assert (building_stmt_tree ());
11197 /* The current function is being defined, so its DECL_INITIAL should
11198 be set, and unless there's a multiple definition, it should be
11199 error_mark_node. */
11200 gcc_assert (DECL_INITIAL (fndecl) == error_mark_node);
11202 /* For a cloned function, we've already got all the code we need;
11203 there's no need to add any extra bits. */
11204 if (!DECL_CLONED_FUNCTION_P (fndecl))
11206 if (DECL_MAIN_P (current_function_decl))
11210 /* Make it so that `main' always returns 0 by default (or
11213 stmt = finish_return_stmt (integer_one_node);
11215 stmt = finish_return_stmt (integer_zero_node);
11217 /* Hack. We don't want the middle-end to warn that this
11218 return is unreachable, so put the statement on the
11220 #ifdef USE_MAPPED_LOCATION
11221 SET_EXPR_LOCATION (stmt, UNKNOWN_LOCATION);
11223 annotate_with_file_line (stmt, input_filename, 0);
11227 if (use_eh_spec_block (current_function_decl))
11228 finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
11229 (TREE_TYPE (current_function_decl)),
11230 current_eh_spec_block);
11233 /* If we're saving up tree structure, tie off the function now. */
11234 DECL_SAVED_TREE (fndecl) = pop_stmt_list (DECL_SAVED_TREE (fndecl));
11236 finish_fname_decls ();
11238 /* If this function can't throw any exceptions, remember that. */
11239 if (!processing_template_decl
11240 && !cp_function_chain->can_throw
11241 && !flag_non_call_exceptions
11242 && targetm.binds_local_p (fndecl))
11243 TREE_NOTHROW (fndecl) = 1;
11245 /* This must come after expand_function_end because cleanups might
11246 have declarations (from inline functions) that need to go into
11247 this function's blocks. */
11249 /* If the current binding level isn't the outermost binding level
11250 for this function, either there is a bug, or we have experienced
11251 syntax errors and the statement tree is malformed. */
11252 if (current_binding_level->kind != sk_function_parms)
11254 /* Make sure we have already experienced errors. */
11255 gcc_assert (errorcount);
11257 /* Throw away the broken statement tree and extra binding
11259 DECL_SAVED_TREE (fndecl) = alloc_stmt_list ();
11261 while (current_binding_level->kind != sk_function_parms)
11263 if (current_binding_level->kind == sk_class)
11264 pop_nested_class ();
11266 poplevel (0, 0, 0);
11269 poplevel (1, 0, 1);
11271 /* Statements should always be full-expressions at the outermost set
11272 of curly braces for a function. */
11273 gcc_assert (stmts_are_full_exprs_p ());
11275 /* Set up the named return value optimization, if we can. Candidate
11276 variables are selected in check_return_value. */
11277 if (current_function_return_value)
11279 tree r = current_function_return_value;
11282 if (r != error_mark_node
11283 /* This is only worth doing for fns that return in memory--and
11284 simpler, since we don't have to worry about promoted modes. */
11285 && aggregate_value_p (TREE_TYPE (TREE_TYPE (fndecl)), fndecl)
11286 /* Only allow this for variables declared in the outer scope of
11287 the function so we know that their lifetime always ends with a
11288 return; see g++.dg/opt/nrv6.C. We could be more flexible if
11289 we were to do this optimization in tree-ssa. */
11290 && (outer = outer_curly_brace_block (fndecl))
11291 && chain_member (r, BLOCK_VARS (outer)))
11292 finalize_nrv (&DECL_SAVED_TREE (fndecl), r, DECL_RESULT (fndecl));
11294 current_function_return_value = NULL_TREE;
11297 /* Remember that we were in class scope. */
11298 if (current_class_name)
11299 ctype = current_class_type;
11301 /* Must mark the RESULT_DECL as being in this function. */
11302 DECL_CONTEXT (DECL_RESULT (fndecl)) = fndecl;
11304 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
11305 to the FUNCTION_DECL node itself. */
11306 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl)) = fndecl;
11308 /* Save away current state, if appropriate. */
11309 if (!processing_template_decl)
11310 save_function_data (fndecl);
11312 /* Complain if there's just no return statement. */
11313 if (warn_return_type
11314 && TREE_CODE (TREE_TYPE (fntype)) != VOID_TYPE
11315 && !dependent_type_p (TREE_TYPE (fntype))
11316 && !current_function_returns_value && !current_function_returns_null
11317 /* Don't complain if we abort or throw. */
11318 && !current_function_returns_abnormally
11319 && !DECL_NAME (DECL_RESULT (fndecl))
11320 /* Normally, with -Wreturn-type, flow will complain. Unless we're an
11321 inline function, as we might never be compiled separately. */
11322 && (DECL_INLINE (fndecl) || processing_template_decl)
11323 /* Structor return values (if any) are set by the compiler. */
11324 && !DECL_CONSTRUCTOR_P (fndecl)
11325 && !DECL_DESTRUCTOR_P (fndecl))
11326 warning (OPT_Wreturn_type, "no return statement in function returning non-void");
11328 /* Store the end of the function, so that we get good line number
11329 info for the epilogue. */
11330 cfun->function_end_locus = input_location;
11332 /* Genericize before inlining. */
11333 if (!processing_template_decl)
11335 struct language_function *f = DECL_SAVED_FUNCTION_DATA (fndecl);
11336 cp_genericize (fndecl);
11337 /* Clear out the bits we don't need. */
11338 f->x_current_class_ptr = NULL;
11339 f->x_current_class_ref = NULL;
11340 f->x_eh_spec_block = NULL;
11341 f->x_in_charge_parm = NULL;
11342 f->x_vtt_parm = NULL;
11343 f->x_return_value = NULL;
11344 f->bindings = NULL;
11345 f->extern_decl_map = NULL;
11347 /* Handle attribute((warn_unused_result)). Relies on gimple input. */
11348 c_warn_unused_result (&DECL_SAVED_TREE (fndecl));
11350 /* Clear out the bits we don't need. */
11351 local_names = NULL;
11353 /* We're leaving the context of this function, so zap cfun. It's still in
11354 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
11356 current_function_decl = NULL;
11358 /* If this is an in-class inline definition, we may have to pop the
11359 bindings for the template parameters that we added in
11360 maybe_begin_member_template_processing when start_function was
11362 if (inclass_inline)
11363 maybe_end_member_template_processing ();
11365 /* Leave the scope of the class. */
11367 pop_nested_class ();
11373 /* Let the error reporting routines know that we're outside a
11374 function. For a nested function, this value is used in
11375 cxx_pop_function_context and then reset via pop_function_context. */
11376 current_function_decl = NULL_TREE;
11381 /* Create the FUNCTION_DECL for a function definition.
11382 DECLSPECS and DECLARATOR are the parts of the declaration;
11383 they describe the return type and the name of the function,
11384 but twisted together in a fashion that parallels the syntax of C.
11386 This function creates a binding context for the function body
11387 as well as setting up the FUNCTION_DECL in current_function_decl.
11389 Returns a FUNCTION_DECL on success.
11391 If the DECLARATOR is not suitable for a function (it defines a datum
11392 instead), we return 0, which tells yyparse to report a parse error.
11394 May return void_type_node indicating that this method is actually
11395 a friend. See grokfield for more details.
11397 Came here with a `.pushlevel' .
11399 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
11400 CHANGES TO CODE IN `grokfield'. */
11403 start_method (cp_decl_specifier_seq *declspecs,
11404 const cp_declarator *declarator, tree attrlist)
11406 tree fndecl = grokdeclarator (declarator, declspecs, MEMFUNCDEF, 0,
11409 if (fndecl == error_mark_node)
11410 return error_mark_node;
11412 if (fndecl == NULL || TREE_CODE (fndecl) != FUNCTION_DECL)
11414 error ("invalid member function declaration");
11415 return error_mark_node;
11419 cplus_decl_attributes (&fndecl, attrlist, 0);
11421 /* Pass friends other than inline friend functions back. */
11422 if (fndecl == void_type_node)
11425 if (DECL_IN_AGGR_P (fndecl))
11427 if (DECL_CONTEXT (fndecl)
11428 && TREE_CODE (DECL_CONTEXT (fndecl)) != NAMESPACE_DECL)
11429 error ("%qD is already defined in class %qT", fndecl,
11430 DECL_CONTEXT (fndecl));
11431 return error_mark_node;
11434 check_template_shadow (fndecl);
11436 DECL_DECLARED_INLINE_P (fndecl) = 1;
11437 if (flag_default_inline)
11438 DECL_INLINE (fndecl) = 1;
11440 /* We process method specializations in finish_struct_1. */
11441 if (processing_template_decl && !DECL_TEMPLATE_SPECIALIZATION (fndecl))
11443 fndecl = push_template_decl (fndecl);
11444 if (fndecl == error_mark_node)
11448 if (! DECL_FRIEND_P (fndecl))
11450 if (TREE_CHAIN (fndecl))
11452 fndecl = copy_node (fndecl);
11453 TREE_CHAIN (fndecl) = NULL_TREE;
11457 finish_decl (fndecl, NULL_TREE, NULL_TREE);
11459 /* Make a place for the parms. */
11460 begin_scope (sk_function_parms, fndecl);
11462 DECL_IN_AGGR_P (fndecl) = 1;
11466 /* Go through the motions of finishing a function definition.
11467 We don't compile this method until after the whole class has
11470 FINISH_METHOD must return something that looks as though it
11471 came from GROKFIELD (since we are defining a method, after all).
11473 This is called after parsing the body of the function definition.
11474 STMTS is the chain of statements that makes up the function body.
11476 DECL is the ..._DECL that `start_method' provided. */
11479 finish_method (tree decl)
11481 tree fndecl = decl;
11486 if (decl == void_type_node)
11489 old_initial = DECL_INITIAL (fndecl);
11491 /* Undo the level for the parms (from start_method).
11492 This is like poplevel, but it causes nothing to be
11493 saved. Saving information here confuses symbol-table
11494 output routines. Besides, this information will
11495 be correctly output when this method is actually
11498 /* Clear out the meanings of the local variables of this level;
11499 also record in each decl which block it belongs to. */
11501 for (link = current_binding_level->names; link; link = TREE_CHAIN (link))
11503 if (DECL_NAME (link) != NULL_TREE)
11504 pop_binding (DECL_NAME (link), link);
11505 gcc_assert (TREE_CODE (link) != FUNCTION_DECL);
11506 DECL_CONTEXT (link) = NULL_TREE;
11509 poplevel (0, 0, 0);
11511 DECL_INITIAL (fndecl) = old_initial;
11513 /* We used to check if the context of FNDECL was different from
11514 current_class_type as another way to get inside here. This didn't work
11515 for String.cc in libg++. */
11516 if (DECL_FRIEND_P (fndecl))
11518 VEC_safe_push (tree, gc, CLASSTYPE_INLINE_FRIENDS (current_class_type),
11520 decl = void_type_node;
11527 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
11528 we can lay it out later, when and if its type becomes complete. */
11531 maybe_register_incomplete_var (tree var)
11533 gcc_assert (TREE_CODE (var) == VAR_DECL);
11535 /* Keep track of variables with incomplete types. */
11536 if (!processing_template_decl && TREE_TYPE (var) != error_mark_node
11537 && DECL_EXTERNAL (var))
11539 tree inner_type = TREE_TYPE (var);
11541 while (TREE_CODE (inner_type) == ARRAY_TYPE)
11542 inner_type = TREE_TYPE (inner_type);
11543 inner_type = TYPE_MAIN_VARIANT (inner_type);
11545 if ((!COMPLETE_TYPE_P (inner_type) && CLASS_TYPE_P (inner_type))
11546 /* RTTI TD entries are created while defining the type_info. */
11547 || (TYPE_LANG_SPECIFIC (inner_type)
11548 && TYPE_BEING_DEFINED (inner_type)))
11549 incomplete_vars = tree_cons (inner_type, var, incomplete_vars);
11553 /* Called when a class type (given by TYPE) is defined. If there are
11554 any existing VAR_DECLs whose type hsa been completed by this
11555 declaration, update them now. */
11558 complete_vars (tree type)
11560 tree *list = &incomplete_vars;
11562 gcc_assert (CLASS_TYPE_P (type));
11565 if (same_type_p (type, TREE_PURPOSE (*list)))
11567 tree var = TREE_VALUE (*list);
11568 tree type = TREE_TYPE (var);
11569 /* Complete the type of the variable. The VAR_DECL itself
11570 will be laid out in expand_expr. */
11571 complete_type (type);
11572 cp_apply_type_quals_to_decl (cp_type_quals (type), var);
11573 /* Remove this entry from the list. */
11574 *list = TREE_CHAIN (*list);
11577 list = &TREE_CHAIN (*list);
11580 /* Check for pending declarations which may have abstract type. */
11581 complete_type_check_abstract (type);
11584 /* If DECL is of a type which needs a cleanup, build that cleanup
11588 cxx_maybe_build_cleanup (tree decl)
11590 tree type = TREE_TYPE (decl);
11592 if (type != error_mark_node && TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
11594 int flags = LOOKUP_NORMAL|LOOKUP_DESTRUCTOR;
11596 bool has_vbases = (TREE_CODE (type) == RECORD_TYPE
11597 && CLASSTYPE_VBASECLASSES (type));
11599 if (TREE_CODE (type) == ARRAY_TYPE)
11603 cxx_mark_addressable (decl);
11604 rval = build_unary_op (ADDR_EXPR, decl, 0);
11607 /* Optimize for space over speed here. */
11608 if (!has_vbases || flag_expensive_optimizations)
11609 flags |= LOOKUP_NONVIRTUAL;
11611 rval = build_delete (TREE_TYPE (rval), rval,
11612 sfk_complete_destructor, flags, 0);
11619 /* When a stmt has been parsed, this function is called. */
11626 /* DECL was originally constructed as a non-static member function,
11627 but turned out to be static. Update it accordingly. */
11630 revert_static_member_fn (tree decl)
11633 tree function = TREE_TYPE (decl);
11634 tree args = TYPE_ARG_TYPES (function);
11636 if (cp_type_quals (TREE_TYPE (TREE_VALUE (args)))
11637 != TYPE_UNQUALIFIED)
11638 error ("static member function %q#D declared with type qualifiers", decl);
11640 args = TREE_CHAIN (args);
11641 tmp = build_function_type (TREE_TYPE (function), args);
11642 tmp = build_qualified_type (tmp, cp_type_quals (function));
11643 tmp = build_exception_variant (tmp,
11644 TYPE_RAISES_EXCEPTIONS (function));
11645 TREE_TYPE (decl) = tmp;
11646 if (DECL_ARGUMENTS (decl))
11647 DECL_ARGUMENTS (decl) = TREE_CHAIN (DECL_ARGUMENTS (decl));
11648 DECL_STATIC_FUNCTION_P (decl) = 1;
11651 /* Initialize the variables used during compilation of a C++
11655 cxx_push_function_context (struct function * f)
11657 struct language_function *p = GGC_CNEW (struct language_function);
11660 /* Whenever we start a new function, we destroy temporaries in the
11662 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
11668 if (DECL_SAVED_FUNCTION_DATA (fn))
11670 /* If we already parsed this function, and we're just expanding it
11671 now, restore saved state. */
11672 *cp_function_chain = *DECL_SAVED_FUNCTION_DATA (fn);
11674 /* We don't need the saved data anymore. Unless this is an inline
11675 function; we need the named return value info for
11676 declare_return_variable. */
11677 if (! DECL_INLINE (fn))
11678 DECL_SAVED_FUNCTION_DATA (fn) = NULL;
11683 /* Free the language-specific parts of F, now that we've finished
11684 compiling the function. */
11687 cxx_pop_function_context (struct function * f)
11692 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
11693 one of the language-independent trees. */
11695 enum cp_tree_node_structure_enum
11696 cp_tree_node_structure (union lang_tree_node * t)
11698 switch (TREE_CODE (&t->generic))
11700 case DEFAULT_ARG: return TS_CP_DEFAULT_ARG;
11701 case IDENTIFIER_NODE: return TS_CP_IDENTIFIER;
11702 case OVERLOAD: return TS_CP_OVERLOAD;
11703 case TEMPLATE_PARM_INDEX: return TS_CP_TPI;
11704 case TINST_LEVEL: return TS_CP_TINST_LEVEL;
11705 case PTRMEM_CST: return TS_CP_PTRMEM;
11706 case BASELINK: return TS_CP_BASELINK;
11707 case STATIC_ASSERT: return TS_CP_STATIC_ASSERT;
11708 default: return TS_CP_GENERIC;
11712 /* Build the void_list_node (void_type_node having been created). */
11714 build_void_list_node (void)
11716 tree t = build_tree_list (NULL_TREE, void_type_node);
11721 cp_missing_noreturn_ok_p (tree decl)
11723 /* A missing noreturn is ok for the `main' function. */
11724 return DECL_MAIN_P (decl);
11727 /* Return the COMDAT group into which DECL should be placed. */
11730 cxx_comdat_group (tree decl)
11734 /* Virtual tables, construction virtual tables, and virtual table
11735 tables all go in a single COMDAT group, named after the primary
11737 if (TREE_CODE (decl) == VAR_DECL && DECL_VTABLE_OR_VTT_P (decl))
11738 name = DECL_ASSEMBLER_NAME (CLASSTYPE_VTABLES (DECL_CONTEXT (decl)));
11739 /* For all other DECLs, the COMDAT group is the mangled name of the
11740 declaration itself. */
11743 while (DECL_THUNK_P (decl))
11745 /* If TARGET_USE_LOCAL_THUNK_ALIAS_P, use_thunk puts the thunk
11746 into the same section as the target function. In that case
11747 we must return target's name. */
11748 tree target = THUNK_TARGET (decl);
11749 if (TARGET_USE_LOCAL_THUNK_ALIAS_P (target)
11750 && DECL_SECTION_NAME (target) != NULL
11751 && DECL_ONE_ONLY (target))
11756 name = DECL_ASSEMBLER_NAME (decl);
11759 return IDENTIFIER_POINTER (name);
11762 #include "gt-cp-decl.h"