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));
368 else if (!TREE_USED (label))
369 warning (OPT_Wunused_label, "label %q+D defined but not used", 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_THIS_STATIC (newdecl) |= DECL_THIS_STATIC (olddecl);
1580 if (DECL_OVERLOADED_OPERATOR_P (olddecl) != ERROR_MARK)
1581 SET_OVERLOADED_OPERATOR_CODE
1582 (newdecl, DECL_OVERLOADED_OPERATOR_P (olddecl));
1583 new_defines_function = DECL_INITIAL (newdecl) != NULL_TREE;
1585 /* Optionally warn about more than one declaration for the same
1586 name, but don't warn about a function declaration followed by a
1588 if (warn_redundant_decls && ! DECL_ARTIFICIAL (olddecl)
1589 && !(new_defines_function && DECL_INITIAL (olddecl) == NULL_TREE)
1590 /* Don't warn about extern decl followed by definition. */
1591 && !(DECL_EXTERNAL (olddecl) && ! DECL_EXTERNAL (newdecl))
1592 /* Don't warn about friends, let add_friend take care of it. */
1593 && ! (newdecl_is_friend || DECL_FRIEND_P (olddecl)))
1595 warning (OPT_Wredundant_decls, "redundant redeclaration of %qD in same scope", newdecl);
1596 warning (OPT_Wredundant_decls, "previous declaration of %q+D", olddecl);
1600 /* Deal with C++: must preserve virtual function table size. */
1601 if (TREE_CODE (olddecl) == TYPE_DECL)
1603 tree newtype = TREE_TYPE (newdecl);
1604 tree oldtype = TREE_TYPE (olddecl);
1606 if (newtype != error_mark_node && oldtype != error_mark_node
1607 && TYPE_LANG_SPECIFIC (newtype) && TYPE_LANG_SPECIFIC (oldtype))
1608 CLASSTYPE_FRIEND_CLASSES (newtype)
1609 = CLASSTYPE_FRIEND_CLASSES (oldtype);
1611 DECL_ORIGINAL_TYPE (newdecl) = DECL_ORIGINAL_TYPE (olddecl);
1614 /* Copy all the DECL_... slots specified in the new decl
1615 except for any that we copy here from the old type. */
1616 DECL_ATTRIBUTES (newdecl)
1617 = (*targetm.merge_decl_attributes) (olddecl, newdecl);
1619 if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1623 old_result = DECL_TEMPLATE_RESULT (olddecl);
1624 new_result = DECL_TEMPLATE_RESULT (newdecl);
1625 TREE_TYPE (olddecl) = TREE_TYPE (old_result);
1626 DECL_TEMPLATE_SPECIALIZATIONS (olddecl)
1627 = chainon (DECL_TEMPLATE_SPECIALIZATIONS (olddecl),
1628 DECL_TEMPLATE_SPECIALIZATIONS (newdecl));
1630 if (DECL_FUNCTION_TEMPLATE_P (newdecl))
1632 DECL_INLINE (old_result)
1633 |= DECL_INLINE (new_result);
1634 DECL_DECLARED_INLINE_P (old_result)
1635 |= DECL_DECLARED_INLINE_P (new_result);
1636 check_redeclaration_exception_specification (newdecl, olddecl);
1639 /* If the new declaration is a definition, update the file and
1640 line information on the declaration, and also make
1641 the old declaration the same definition. */
1642 if (DECL_INITIAL (old_result) == NULL_TREE
1643 && DECL_INITIAL (new_result) != NULL_TREE)
1645 DECL_SOURCE_LOCATION (olddecl)
1646 = DECL_SOURCE_LOCATION (old_result)
1647 = DECL_SOURCE_LOCATION (newdecl);
1648 DECL_INITIAL (old_result) = DECL_INITIAL (new_result);
1649 if (DECL_FUNCTION_TEMPLATE_P (newdecl))
1650 DECL_ARGUMENTS (old_result)
1651 = DECL_ARGUMENTS (new_result);
1659 /* Automatically handles default parameters. */
1660 tree oldtype = TREE_TYPE (olddecl);
1663 /* Merge the data types specified in the two decls. */
1664 newtype = merge_types (TREE_TYPE (newdecl), TREE_TYPE (olddecl));
1666 /* If merge_types produces a non-typedef type, just use the old type. */
1667 if (TREE_CODE (newdecl) == TYPE_DECL
1668 && newtype == DECL_ORIGINAL_TYPE (newdecl))
1671 if (TREE_CODE (newdecl) == VAR_DECL)
1673 DECL_THIS_EXTERN (newdecl) |= DECL_THIS_EXTERN (olddecl);
1674 DECL_INITIALIZED_P (newdecl) |= DECL_INITIALIZED_P (olddecl);
1675 DECL_NONTRIVIALLY_INITIALIZED_P (newdecl)
1676 |= DECL_NONTRIVIALLY_INITIALIZED_P (olddecl);
1677 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (newdecl)
1678 |= DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (olddecl);
1680 /* Merge the threadprivate attribute from OLDDECL into NEWDECL. */
1681 if (DECL_LANG_SPECIFIC (olddecl)
1682 && CP_DECL_THREADPRIVATE_P (olddecl))
1684 /* Allocate a LANG_SPECIFIC structure for NEWDECL, if needed. */
1685 if (!DECL_LANG_SPECIFIC (newdecl))
1686 retrofit_lang_decl (newdecl);
1688 DECL_TLS_MODEL (newdecl) = DECL_TLS_MODEL (olddecl);
1689 CP_DECL_THREADPRIVATE_P (newdecl) = 1;
1693 /* Do this after calling `merge_types' so that default
1694 parameters don't confuse us. */
1695 else if (TREE_CODE (newdecl) == FUNCTION_DECL)
1696 check_redeclaration_exception_specification (newdecl, olddecl);
1697 TREE_TYPE (newdecl) = TREE_TYPE (olddecl) = newtype;
1699 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1700 check_default_args (newdecl);
1702 /* Lay the type out, unless already done. */
1703 if (! same_type_p (newtype, oldtype)
1704 && TREE_TYPE (newdecl) != error_mark_node
1705 && !(processing_template_decl && uses_template_parms (newdecl)))
1706 layout_type (TREE_TYPE (newdecl));
1708 if ((TREE_CODE (newdecl) == VAR_DECL
1709 || TREE_CODE (newdecl) == PARM_DECL
1710 || TREE_CODE (newdecl) == RESULT_DECL
1711 || TREE_CODE (newdecl) == FIELD_DECL
1712 || TREE_CODE (newdecl) == TYPE_DECL)
1713 && !(processing_template_decl && uses_template_parms (newdecl)))
1714 layout_decl (newdecl, 0);
1716 /* Merge the type qualifiers. */
1717 if (TREE_READONLY (newdecl))
1718 TREE_READONLY (olddecl) = 1;
1719 if (TREE_THIS_VOLATILE (newdecl))
1720 TREE_THIS_VOLATILE (olddecl) = 1;
1721 if (TREE_NOTHROW (newdecl))
1722 TREE_NOTHROW (olddecl) = 1;
1724 /* Merge deprecatedness. */
1725 if (TREE_DEPRECATED (newdecl))
1726 TREE_DEPRECATED (olddecl) = 1;
1728 /* Merge the initialization information. */
1729 if (DECL_INITIAL (newdecl) == NULL_TREE
1730 && DECL_INITIAL (olddecl) != NULL_TREE)
1732 DECL_INITIAL (newdecl) = DECL_INITIAL (olddecl);
1733 DECL_SOURCE_LOCATION (newdecl) = DECL_SOURCE_LOCATION (olddecl);
1734 if (CAN_HAVE_FULL_LANG_DECL_P (newdecl)
1735 && DECL_LANG_SPECIFIC (newdecl)
1736 && DECL_LANG_SPECIFIC (olddecl))
1738 DECL_SAVED_TREE (newdecl) = DECL_SAVED_TREE (olddecl);
1739 DECL_STRUCT_FUNCTION (newdecl) = DECL_STRUCT_FUNCTION (olddecl);
1743 /* Merge the section attribute.
1744 We want to issue an error if the sections conflict but that must be
1745 done later in decl_attributes since we are called before attributes
1747 if (DECL_SECTION_NAME (newdecl) == NULL_TREE)
1748 DECL_SECTION_NAME (newdecl) = DECL_SECTION_NAME (olddecl);
1750 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1752 DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (newdecl)
1753 |= DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (olddecl);
1754 DECL_NO_LIMIT_STACK (newdecl) |= DECL_NO_LIMIT_STACK (olddecl);
1755 TREE_THIS_VOLATILE (newdecl) |= TREE_THIS_VOLATILE (olddecl);
1756 TREE_READONLY (newdecl) |= TREE_READONLY (olddecl);
1757 TREE_NOTHROW (newdecl) |= TREE_NOTHROW (olddecl);
1758 DECL_IS_MALLOC (newdecl) |= DECL_IS_MALLOC (olddecl);
1759 DECL_IS_PURE (newdecl) |= DECL_IS_PURE (olddecl);
1760 /* Keep the old RTL. */
1761 COPY_DECL_RTL (olddecl, newdecl);
1763 else if (TREE_CODE (newdecl) == VAR_DECL
1764 && (DECL_SIZE (olddecl) || !DECL_SIZE (newdecl)))
1766 /* Keep the old RTL. We cannot keep the old RTL if the old
1767 declaration was for an incomplete object and the new
1768 declaration is not since many attributes of the RTL will
1770 COPY_DECL_RTL (olddecl, newdecl);
1773 /* If cannot merge, then use the new type and qualifiers,
1774 and don't preserve the old rtl. */
1777 /* Clean out any memory we had of the old declaration. */
1778 tree oldstatic = value_member (olddecl, static_aggregates);
1780 TREE_VALUE (oldstatic) = error_mark_node;
1782 TREE_TYPE (olddecl) = TREE_TYPE (newdecl);
1783 TREE_READONLY (olddecl) = TREE_READONLY (newdecl);
1784 TREE_THIS_VOLATILE (olddecl) = TREE_THIS_VOLATILE (newdecl);
1785 TREE_SIDE_EFFECTS (olddecl) = TREE_SIDE_EFFECTS (newdecl);
1788 /* Merge the storage class information. */
1789 merge_weak (newdecl, olddecl);
1791 DECL_ONE_ONLY (newdecl) |= DECL_ONE_ONLY (olddecl);
1792 DECL_DEFER_OUTPUT (newdecl) |= DECL_DEFER_OUTPUT (olddecl);
1793 TREE_PUBLIC (newdecl) = TREE_PUBLIC (olddecl);
1794 TREE_STATIC (olddecl) = TREE_STATIC (newdecl) |= TREE_STATIC (olddecl);
1795 if (! DECL_EXTERNAL (olddecl))
1796 DECL_EXTERNAL (newdecl) = 0;
1798 new_template = NULL_TREE;
1799 if (DECL_LANG_SPECIFIC (newdecl) && DECL_LANG_SPECIFIC (olddecl))
1801 DECL_INTERFACE_KNOWN (newdecl) |= DECL_INTERFACE_KNOWN (olddecl);
1802 DECL_NOT_REALLY_EXTERN (newdecl) |= DECL_NOT_REALLY_EXTERN (olddecl);
1803 DECL_COMDAT (newdecl) |= DECL_COMDAT (olddecl);
1804 DECL_TEMPLATE_INSTANTIATED (newdecl)
1805 |= DECL_TEMPLATE_INSTANTIATED (olddecl);
1807 /* If the OLDDECL is an instantiation and/or specialization,
1808 then the NEWDECL must be too. But, it may not yet be marked
1809 as such if the caller has created NEWDECL, but has not yet
1810 figured out that it is a redeclaration. */
1811 if (!DECL_USE_TEMPLATE (newdecl))
1812 DECL_USE_TEMPLATE (newdecl) = DECL_USE_TEMPLATE (olddecl);
1814 /* Don't really know how much of the language-specific
1815 values we should copy from old to new. */
1816 DECL_IN_AGGR_P (newdecl) = DECL_IN_AGGR_P (olddecl);
1817 DECL_LANG_SPECIFIC (newdecl)->decl_flags.u2 =
1818 DECL_LANG_SPECIFIC (olddecl)->decl_flags.u2;
1819 DECL_NONCONVERTING_P (newdecl) = DECL_NONCONVERTING_P (olddecl);
1820 DECL_REPO_AVAILABLE_P (newdecl) = DECL_REPO_AVAILABLE_P (olddecl);
1821 if (DECL_TEMPLATE_INFO (newdecl))
1822 new_template = DECL_TI_TEMPLATE (newdecl);
1823 DECL_TEMPLATE_INFO (newdecl) = DECL_TEMPLATE_INFO (olddecl);
1824 DECL_INITIALIZED_IN_CLASS_P (newdecl)
1825 |= DECL_INITIALIZED_IN_CLASS_P (olddecl);
1826 olddecl_friend = DECL_FRIEND_P (olddecl);
1827 hidden_friend = (DECL_ANTICIPATED (olddecl)
1828 && DECL_HIDDEN_FRIEND_P (olddecl)
1829 && newdecl_is_friend);
1831 /* Only functions have DECL_BEFRIENDING_CLASSES. */
1832 if (TREE_CODE (newdecl) == FUNCTION_DECL
1833 || DECL_FUNCTION_TEMPLATE_P (newdecl))
1835 DECL_BEFRIENDING_CLASSES (newdecl)
1836 = chainon (DECL_BEFRIENDING_CLASSES (newdecl),
1837 DECL_BEFRIENDING_CLASSES (olddecl));
1838 /* DECL_THUNKS is only valid for virtual functions,
1839 otherwise it is a DECL_FRIEND_CONTEXT. */
1840 if (DECL_VIRTUAL_P (newdecl))
1841 DECL_THUNKS (newdecl) = DECL_THUNKS (olddecl);
1845 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1847 if (DECL_TEMPLATE_INSTANTIATION (olddecl)
1848 && !DECL_TEMPLATE_INSTANTIATION (newdecl))
1850 /* If newdecl is not a specialization, then it is not a
1851 template-related function at all. And that means that we
1852 should have exited above, returning 0. */
1853 gcc_assert (DECL_TEMPLATE_SPECIALIZATION (newdecl));
1855 if (TREE_USED (olddecl))
1856 /* From [temp.expl.spec]:
1858 If a template, a member template or the member of a class
1859 template is explicitly specialized then that
1860 specialization shall be declared before the first use of
1861 that specialization that would cause an implicit
1862 instantiation to take place, in every translation unit in
1863 which such a use occurs. */
1864 error ("explicit specialization of %qD after first use",
1867 SET_DECL_TEMPLATE_SPECIALIZATION (olddecl);
1869 /* Don't propagate visibility from the template to the
1870 specialization here. We'll do that in determine_visibility if
1872 DECL_VISIBILITY_SPECIFIED (olddecl) = 0;
1874 /* [temp.expl.spec/14] We don't inline explicit specialization
1875 just because the primary template says so. */
1879 if (DECL_PENDING_INLINE_INFO (newdecl) == 0)
1880 DECL_PENDING_INLINE_INFO (newdecl) = DECL_PENDING_INLINE_INFO (olddecl);
1882 DECL_DECLARED_INLINE_P (newdecl) |= DECL_DECLARED_INLINE_P (olddecl);
1884 /* If either decl says `inline', this fn is inline, unless
1885 its definition was passed already. */
1886 if (DECL_INLINE (newdecl) && DECL_INITIAL (olddecl) == NULL_TREE)
1887 DECL_INLINE (olddecl) = 1;
1888 DECL_INLINE (newdecl) = DECL_INLINE (olddecl);
1890 DECL_UNINLINABLE (newdecl) = DECL_UNINLINABLE (olddecl)
1891 = (DECL_UNINLINABLE (newdecl) || DECL_UNINLINABLE (olddecl));
1894 /* Preserve abstractness on cloned [cd]tors. */
1895 DECL_ABSTRACT (newdecl) = DECL_ABSTRACT (olddecl);
1899 SET_DECL_LANGUAGE (olddecl, DECL_LANGUAGE (newdecl));
1900 COPY_DECL_ASSEMBLER_NAME (newdecl, olddecl);
1901 COPY_DECL_RTL (newdecl, olddecl);
1903 if (! types_match || new_defines_function)
1905 /* These need to be copied so that the names are available.
1906 Note that if the types do match, we'll preserve inline
1907 info and other bits, but if not, we won't. */
1908 DECL_ARGUMENTS (olddecl) = DECL_ARGUMENTS (newdecl);
1909 DECL_RESULT (olddecl) = DECL_RESULT (newdecl);
1911 if (new_defines_function)
1912 /* If defining a function declared with other language
1913 linkage, use the previously declared language linkage. */
1914 SET_DECL_LANGUAGE (newdecl, DECL_LANGUAGE (olddecl));
1915 else if (types_match)
1917 /* If redeclaring a builtin function, and not a definition,
1918 it stays built in. */
1919 if (DECL_BUILT_IN (olddecl))
1921 DECL_BUILT_IN_CLASS (newdecl) = DECL_BUILT_IN_CLASS (olddecl);
1922 DECL_FUNCTION_CODE (newdecl) = DECL_FUNCTION_CODE (olddecl);
1923 /* If we're keeping the built-in definition, keep the rtl,
1924 regardless of declaration matches. */
1925 COPY_DECL_RTL (olddecl, newdecl);
1928 DECL_RESULT (newdecl) = DECL_RESULT (olddecl);
1929 /* Don't clear out the arguments if we're redefining a function. */
1930 if (DECL_ARGUMENTS (olddecl))
1931 DECL_ARGUMENTS (newdecl) = DECL_ARGUMENTS (olddecl);
1934 else if (TREE_CODE (newdecl) == NAMESPACE_DECL)
1935 NAMESPACE_LEVEL (newdecl) = NAMESPACE_LEVEL (olddecl);
1937 /* Now preserve various other info from the definition. */
1938 TREE_ADDRESSABLE (newdecl) = TREE_ADDRESSABLE (olddecl);
1939 TREE_ASM_WRITTEN (newdecl) = TREE_ASM_WRITTEN (olddecl);
1940 DECL_COMMON (newdecl) = DECL_COMMON (olddecl);
1941 COPY_DECL_ASSEMBLER_NAME (olddecl, newdecl);
1943 /* Warn about conflicting visibility specifications. */
1944 if (DECL_VISIBILITY_SPECIFIED (olddecl)
1945 && DECL_VISIBILITY_SPECIFIED (newdecl)
1946 && DECL_VISIBILITY (newdecl) != DECL_VISIBILITY (olddecl))
1948 warning (OPT_Wattributes, "%q+D: visibility attribute ignored "
1949 "because it", newdecl);
1950 warning (OPT_Wattributes, "%Jconflicts with previous "
1951 "declaration here", olddecl);
1953 /* Choose the declaration which specified visibility. */
1954 if (DECL_VISIBILITY_SPECIFIED (olddecl))
1956 DECL_VISIBILITY (newdecl) = DECL_VISIBILITY (olddecl);
1957 DECL_VISIBILITY_SPECIFIED (newdecl) = 1;
1959 /* Init priority used to be merged from newdecl to olddecl by the memcpy,
1960 so keep this behavior. */
1961 if (TREE_CODE (newdecl) == VAR_DECL && DECL_HAS_INIT_PRIORITY_P (newdecl))
1963 SET_DECL_INIT_PRIORITY (olddecl, DECL_INIT_PRIORITY (newdecl));
1964 DECL_HAS_INIT_PRIORITY_P (olddecl) = 1;
1967 /* The DECL_LANG_SPECIFIC information in OLDDECL will be replaced
1968 with that from NEWDECL below. */
1969 if (DECL_LANG_SPECIFIC (olddecl))
1971 gcc_assert (DECL_LANG_SPECIFIC (olddecl)
1972 != DECL_LANG_SPECIFIC (newdecl));
1973 ggc_free (DECL_LANG_SPECIFIC (olddecl));
1976 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1980 function_size = sizeof (struct tree_decl_common);
1982 memcpy ((char *) olddecl + sizeof (struct tree_common),
1983 (char *) newdecl + sizeof (struct tree_common),
1984 function_size - sizeof (struct tree_common));
1986 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
1987 (char *) newdecl + sizeof (struct tree_decl_common),
1988 sizeof (struct tree_function_decl) - sizeof (struct tree_decl_common));
1990 /* If newdecl is a template instantiation, it is possible that
1991 the following sequence of events has occurred:
1993 o A friend function was declared in a class template. The
1994 class template was instantiated.
1996 o The instantiation of the friend declaration was
1997 recorded on the instantiation list, and is newdecl.
1999 o Later, however, instantiate_class_template called pushdecl
2000 on the newdecl to perform name injection. But, pushdecl in
2001 turn called duplicate_decls when it discovered that another
2002 declaration of a global function with the same name already
2005 o Here, in duplicate_decls, we decided to clobber newdecl.
2007 If we're going to do that, we'd better make sure that
2008 olddecl, and not newdecl, is on the list of
2009 instantiations so that if we try to do the instantiation
2010 again we won't get the clobbered declaration. */
2011 reregister_specialization (newdecl,
2017 size_t size = tree_code_size (TREE_CODE (olddecl));
2018 memcpy ((char *) olddecl + sizeof (struct tree_common),
2019 (char *) newdecl + sizeof (struct tree_common),
2020 sizeof (struct tree_decl_common) - sizeof (struct tree_common));
2021 switch (TREE_CODE (olddecl))
2031 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
2032 (char *) newdecl + sizeof (struct tree_decl_common),
2033 size - sizeof (struct tree_decl_common)
2034 + TREE_CODE_LENGTH (TREE_CODE (newdecl)) * sizeof (char *));
2038 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
2039 (char *) newdecl + sizeof (struct tree_decl_common),
2040 sizeof (struct tree_decl_non_common) - sizeof (struct tree_decl_common)
2041 + TREE_CODE_LENGTH (TREE_CODE (newdecl)) * sizeof (char *));
2045 DECL_UID (olddecl) = olddecl_uid;
2047 DECL_FRIEND_P (olddecl) = 1;
2050 DECL_ANTICIPATED (olddecl) = 1;
2051 DECL_HIDDEN_FRIEND_P (olddecl) = 1;
2054 /* NEWDECL contains the merged attribute lists.
2055 Update OLDDECL to be the same. */
2056 DECL_ATTRIBUTES (olddecl) = DECL_ATTRIBUTES (newdecl);
2058 /* If OLDDECL had its DECL_RTL instantiated, re-invoke make_decl_rtl
2059 so that encode_section_info has a chance to look at the new decl
2060 flags and attributes. */
2061 if (DECL_RTL_SET_P (olddecl)
2062 && (TREE_CODE (olddecl) == FUNCTION_DECL
2063 || (TREE_CODE (olddecl) == VAR_DECL
2064 && TREE_STATIC (olddecl))))
2065 make_decl_rtl (olddecl);
2067 /* The NEWDECL will no longer be needed. Because every out-of-class
2068 declaration of a member results in a call to duplicate_decls,
2069 freeing these nodes represents in a significant savings. */
2075 /* Return zero if the declaration NEWDECL is valid
2076 when the declaration OLDDECL (assumed to be for the same name)
2077 has already been seen.
2078 Otherwise return an error message format string with a %s
2079 where the identifier should go. */
2082 redeclaration_error_message (tree newdecl, tree olddecl)
2084 if (TREE_CODE (newdecl) == TYPE_DECL)
2086 /* Because C++ can put things into name space for free,
2087 constructs like "typedef struct foo { ... } foo"
2088 would look like an erroneous redeclaration. */
2089 if (same_type_p (TREE_TYPE (newdecl), TREE_TYPE (olddecl)))
2092 return "redefinition of %q#D";
2094 else if (TREE_CODE (newdecl) == FUNCTION_DECL)
2096 /* If this is a pure function, its olddecl will actually be
2097 the original initialization to `0' (which we force to call
2098 abort()). Don't complain about redefinition in this case. */
2099 if (DECL_LANG_SPECIFIC (olddecl) && DECL_PURE_VIRTUAL_P (olddecl)
2100 && DECL_INITIAL (olddecl) == NULL_TREE)
2103 /* If both functions come from different namespaces, this is not
2104 a redeclaration - this is a conflict with a used function. */
2105 if (DECL_NAMESPACE_SCOPE_P (olddecl)
2106 && DECL_CONTEXT (olddecl) != DECL_CONTEXT (newdecl)
2107 && ! decls_match (olddecl, newdecl))
2108 return "%qD conflicts with used function";
2110 /* We'll complain about linkage mismatches in
2111 warn_extern_redeclared_static. */
2113 /* Defining the same name twice is no good. */
2114 if (DECL_INITIAL (olddecl) != NULL_TREE
2115 && DECL_INITIAL (newdecl) != NULL_TREE)
2117 if (DECL_NAME (olddecl) == NULL_TREE)
2118 return "%q#D not declared in class";
2120 return "redefinition of %q#D";
2124 else if (TREE_CODE (newdecl) == TEMPLATE_DECL)
2128 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
2130 if (COMPLETE_TYPE_P (TREE_TYPE (newdecl))
2131 && COMPLETE_TYPE_P (TREE_TYPE (olddecl)))
2132 return "redefinition of %q#D";
2136 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) != FUNCTION_DECL
2137 || (DECL_TEMPLATE_RESULT (newdecl)
2138 == DECL_TEMPLATE_RESULT (olddecl)))
2141 nt = DECL_TEMPLATE_RESULT (newdecl);
2142 if (DECL_TEMPLATE_INFO (nt))
2143 nt = DECL_TEMPLATE_RESULT (template_for_substitution (nt));
2144 ot = DECL_TEMPLATE_RESULT (olddecl);
2145 if (DECL_TEMPLATE_INFO (ot))
2146 ot = DECL_TEMPLATE_RESULT (template_for_substitution (ot));
2147 if (DECL_INITIAL (nt) && DECL_INITIAL (ot))
2148 return "redefinition of %q#D";
2152 else if (TREE_CODE (newdecl) == VAR_DECL
2153 && DECL_THREAD_LOCAL_P (newdecl) != DECL_THREAD_LOCAL_P (olddecl)
2154 && (! DECL_LANG_SPECIFIC (olddecl)
2155 || ! CP_DECL_THREADPRIVATE_P (olddecl)
2156 || DECL_THREAD_LOCAL_P (newdecl)))
2158 /* Only variables can be thread-local, and all declarations must
2159 agree on this property. */
2160 if (DECL_THREAD_LOCAL_P (newdecl))
2161 return "thread-local declaration of %q#D follows "
2162 "non-thread-local declaration";
2164 return "non-thread-local declaration of %q#D follows "
2165 "thread-local declaration";
2167 else if (toplevel_bindings_p () || DECL_NAMESPACE_SCOPE_P (newdecl))
2169 /* Objects declared at top level: */
2170 /* If at least one is a reference, it's ok. */
2171 if (DECL_EXTERNAL (newdecl) || DECL_EXTERNAL (olddecl))
2173 /* Reject two definitions. */
2174 return "redefinition of %q#D";
2178 /* Objects declared with block scope: */
2179 /* Reject two definitions, and reject a definition
2180 together with an external reference. */
2181 if (!(DECL_EXTERNAL (newdecl) && DECL_EXTERNAL (olddecl)))
2182 return "redeclaration of %q#D";
2187 /* Hash and equality functions for the named_label table. */
2190 named_label_entry_hash (const void *data)
2192 const struct named_label_entry *ent = (const struct named_label_entry *) data;
2193 return DECL_UID (ent->label_decl);
2197 named_label_entry_eq (const void *a, const void *b)
2199 const struct named_label_entry *ent_a = (const struct named_label_entry *) a;
2200 const struct named_label_entry *ent_b = (const struct named_label_entry *) b;
2201 return ent_a->label_decl == ent_b->label_decl;
2204 /* Create a new label, named ID. */
2207 make_label_decl (tree id, int local_p)
2209 struct named_label_entry *ent;
2213 decl = build_decl (LABEL_DECL, id, void_type_node);
2215 DECL_CONTEXT (decl) = current_function_decl;
2216 DECL_MODE (decl) = VOIDmode;
2217 C_DECLARED_LABEL_FLAG (decl) = local_p;
2219 /* Say where one reference is to the label, for the sake of the
2220 error if it is not defined. */
2221 DECL_SOURCE_LOCATION (decl) = input_location;
2223 /* Record the fact that this identifier is bound to this label. */
2224 SET_IDENTIFIER_LABEL_VALUE (id, decl);
2226 /* Create the label htab for the function on demand. */
2228 named_labels = htab_create_ggc (13, named_label_entry_hash,
2229 named_label_entry_eq, NULL);
2231 /* Record this label on the list of labels used in this function.
2232 We do this before calling make_label_decl so that we get the
2233 IDENTIFIER_LABEL_VALUE before the new label is declared. */
2234 ent = GGC_CNEW (struct named_label_entry);
2235 ent->label_decl = decl;
2237 slot = htab_find_slot (named_labels, ent, INSERT);
2238 gcc_assert (*slot == NULL);
2244 /* Look for a label named ID in the current function. If one cannot
2245 be found, create one. (We keep track of used, but undefined,
2246 labels, and complain about them at the end of a function.) */
2249 lookup_label (tree id)
2253 timevar_push (TV_NAME_LOOKUP);
2254 /* You can't use labels at global scope. */
2255 if (current_function_decl == NULL_TREE)
2257 error ("label %qE referenced outside of any function", id);
2258 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, NULL_TREE);
2261 /* See if we've already got this label. */
2262 decl = IDENTIFIER_LABEL_VALUE (id);
2263 if (decl != NULL_TREE && DECL_CONTEXT (decl) == current_function_decl)
2264 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2266 decl = make_label_decl (id, /*local_p=*/0);
2267 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2270 /* Declare a local label named ID. */
2273 declare_local_label (tree id)
2277 /* Add a new entry to the SHADOWED_LABELS list so that when we leave
2278 this scope we can restore the old value of IDENTIFIER_TYPE_VALUE. */
2279 shadow = tree_cons (IDENTIFIER_LABEL_VALUE (id), NULL_TREE,
2280 current_binding_level->shadowed_labels);
2281 current_binding_level->shadowed_labels = shadow;
2283 decl = make_label_decl (id, /*local_p=*/1);
2284 TREE_VALUE (shadow) = decl;
2289 /* Returns nonzero if it is ill-formed to jump past the declaration of
2290 DECL. Returns 2 if it's also a real problem. */
2293 decl_jump_unsafe (tree decl)
2295 if (TREE_CODE (decl) != VAR_DECL || TREE_STATIC (decl)
2296 || TREE_TYPE (decl) == error_mark_node)
2299 if (TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl))
2300 || DECL_NONTRIVIALLY_INITIALIZED_P (decl))
2303 if (pod_type_p (TREE_TYPE (decl)))
2306 /* The POD stuff is just pedantry; why should it matter if the class
2307 contains a field of pointer to member type? */
2311 /* A subroutine of check_previous_goto_1 to identify a branch to the user. */
2314 identify_goto (tree decl, const location_t *locus)
2317 pedwarn ("jump to label %qD", decl);
2319 pedwarn ("jump to case label");
2321 pedwarn ("%H from here", locus);
2324 /* Check that a single previously seen jump to a newly defined label
2325 is OK. DECL is the LABEL_DECL or 0; LEVEL is the binding_level for
2326 the jump context; NAMES are the names in scope in LEVEL at the jump
2327 context; LOCUS is the source position of the jump or 0. Returns
2328 true if all is well. */
2331 check_previous_goto_1 (tree decl, struct cp_binding_level* level, tree names,
2332 bool exited_omp, const location_t *locus)
2334 struct cp_binding_level *b;
2335 bool identified = false, saw_eh = false, saw_omp = false;
2339 identify_goto (decl, locus);
2340 error (" exits OpenMP structured block");
2341 identified = saw_omp = true;
2344 for (b = current_binding_level; b ; b = b->level_chain)
2346 tree new_decls, old_decls = (b == level ? names : NULL_TREE);
2348 for (new_decls = b->names; new_decls != old_decls;
2349 new_decls = TREE_CHAIN (new_decls))
2351 int problem = decl_jump_unsafe (new_decls);
2357 identify_goto (decl, locus);
2361 error (" crosses initialization of %q+#D", new_decls);
2363 pedwarn (" enters scope of non-POD %q+#D", new_decls);
2368 if ((b->kind == sk_try || b->kind == sk_catch) && !saw_eh)
2372 identify_goto (decl, locus);
2375 if (b->kind == sk_try)
2376 error (" enters try block");
2378 error (" enters catch block");
2381 if (b->kind == sk_omp && !saw_omp)
2385 identify_goto (decl, locus);
2388 error (" enters OpenMP structured block");
2397 check_previous_goto (tree decl, struct named_label_use_entry *use)
2399 check_previous_goto_1 (decl, use->binding_level,
2400 use->names_in_scope, use->in_omp_scope,
2401 &use->o_goto_locus);
2405 check_switch_goto (struct cp_binding_level* level)
2407 return check_previous_goto_1 (NULL_TREE, level, level->names, false, NULL);
2410 /* Check that a new jump to a label DECL is OK. Called by
2411 finish_goto_stmt. */
2414 check_goto (tree decl)
2416 struct named_label_entry *ent, dummy;
2417 bool saw_catch = false, identified = false;
2420 /* We can't know where a computed goto is jumping.
2421 So we assume that it's OK. */
2422 if (TREE_CODE (decl) != LABEL_DECL)
2425 /* We didn't record any information about this label when we created it,
2426 and there's not much point since it's trivial to analyze as a return. */
2427 if (decl == cdtor_label)
2430 dummy.label_decl = decl;
2431 ent = (struct named_label_entry *) htab_find (named_labels, &dummy);
2432 gcc_assert (ent != NULL);
2434 /* If the label hasn't been defined yet, defer checking. */
2435 if (! DECL_INITIAL (decl))
2437 struct named_label_use_entry *new_use;
2439 /* Don't bother creating another use if the last goto had the
2440 same data, and will therefore create the same set of errors. */
2442 && ent->uses->names_in_scope == current_binding_level->names)
2445 new_use = GGC_NEW (struct named_label_use_entry);
2446 new_use->binding_level = current_binding_level;
2447 new_use->names_in_scope = current_binding_level->names;
2448 new_use->o_goto_locus = input_location;
2449 new_use->in_omp_scope = false;
2451 new_use->next = ent->uses;
2452 ent->uses = new_use;
2456 if (ent->in_try_scope || ent->in_catch_scope
2457 || ent->in_omp_scope || ent->bad_decls)
2459 pedwarn ("jump to label %q+D", decl);
2460 pedwarn (" from here");
2464 for (bad = ent->bad_decls; bad; bad = TREE_CHAIN (bad))
2466 tree b = TREE_VALUE (bad);
2467 int u = decl_jump_unsafe (b);
2469 if (u > 1 && DECL_ARTIFICIAL (b))
2471 /* Can't skip init of __exception_info. */
2472 error ("%J enters catch block", b);
2476 error (" skips initialization of %q+#D", b);
2478 pedwarn (" enters scope of non-POD %q+#D", b);
2481 if (ent->in_try_scope)
2482 error (" enters try block");
2483 else if (ent->in_catch_scope && !saw_catch)
2484 error (" enters catch block");
2486 if (ent->in_omp_scope)
2487 error (" enters OpenMP structured block");
2488 else if (flag_openmp)
2490 struct cp_binding_level *b;
2491 for (b = current_binding_level; b ; b = b->level_chain)
2493 if (b == ent->binding_level)
2495 if (b->kind == sk_omp)
2499 pedwarn ("jump to label %q+D", decl);
2500 pedwarn (" from here");
2503 error (" exits OpenMP structured block");
2510 /* Check that a return is ok wrt OpenMP structured blocks.
2511 Called by finish_return_stmt. Returns true if all is well. */
2514 check_omp_return (void)
2516 struct cp_binding_level *b;
2517 for (b = current_binding_level; b ; b = b->level_chain)
2518 if (b->kind == sk_omp)
2520 error ("invalid exit from OpenMP structured block");
2526 /* Define a label, specifying the location in the source file.
2527 Return the LABEL_DECL node for the label. */
2530 define_label (location_t location, tree name)
2532 struct named_label_entry *ent, dummy;
2533 struct cp_binding_level *p;
2536 timevar_push (TV_NAME_LOOKUP);
2538 decl = lookup_label (name);
2540 dummy.label_decl = decl;
2541 ent = (struct named_label_entry *) htab_find (named_labels, &dummy);
2542 gcc_assert (ent != NULL);
2544 /* After labels, make any new cleanups in the function go into their
2545 own new (temporary) binding contour. */
2546 for (p = current_binding_level;
2547 p->kind != sk_function_parms;
2549 p->more_cleanups_ok = 0;
2551 if (name == get_identifier ("wchar_t"))
2552 pedwarn ("label named wchar_t");
2554 if (DECL_INITIAL (decl) != NULL_TREE)
2556 error ("duplicate label %qD", decl);
2557 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
2561 struct named_label_use_entry *use;
2563 /* Mark label as having been defined. */
2564 DECL_INITIAL (decl) = error_mark_node;
2565 /* Say where in the source. */
2566 DECL_SOURCE_LOCATION (decl) = location;
2568 ent->binding_level = current_binding_level;
2569 ent->names_in_scope = current_binding_level->names;
2571 for (use = ent->uses; use ; use = use->next)
2572 check_previous_goto (decl, use);
2576 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2581 struct cp_binding_level *level;
2582 struct cp_switch *next;
2583 /* The SWITCH_STMT being built. */
2585 /* A splay-tree mapping the low element of a case range to the high
2586 element, or NULL_TREE if there is no high element. Used to
2587 determine whether or not a new case label duplicates an old case
2588 label. We need a tree, rather than simply a hash table, because
2589 of the GNU case range extension. */
2593 /* A stack of the currently active switch statements. The innermost
2594 switch statement is on the top of the stack. There is no need to
2595 mark the stack for garbage collection because it is only active
2596 during the processing of the body of a function, and we never
2597 collect at that point. */
2599 static struct cp_switch *switch_stack;
2601 /* Called right after a switch-statement condition is parsed.
2602 SWITCH_STMT is the switch statement being parsed. */
2605 push_switch (tree switch_stmt)
2607 struct cp_switch *p = XNEW (struct cp_switch);
2608 p->level = current_binding_level;
2609 p->next = switch_stack;
2610 p->switch_stmt = switch_stmt;
2611 p->cases = splay_tree_new (case_compare, NULL, NULL);
2618 struct cp_switch *cs = switch_stack;
2619 location_t switch_location;
2621 /* Emit warnings as needed. */
2622 if (EXPR_HAS_LOCATION (cs->switch_stmt))
2623 switch_location = EXPR_LOCATION (cs->switch_stmt);
2625 switch_location = input_location;
2626 if (!processing_template_decl)
2627 c_do_switch_warnings (cs->cases, switch_location,
2628 SWITCH_STMT_TYPE (cs->switch_stmt),
2629 SWITCH_STMT_COND (cs->switch_stmt));
2631 splay_tree_delete (cs->cases);
2632 switch_stack = switch_stack->next;
2636 /* Note that we've seen a definition of a case label, and complain if this
2637 is a bad place for one. */
2640 finish_case_label (tree low_value, tree high_value)
2643 struct cp_binding_level *p;
2645 if (processing_template_decl)
2649 /* For templates, just add the case label; we'll do semantic
2650 analysis at instantiation-time. */
2651 label = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
2652 return add_stmt (build_case_label (low_value, high_value, label));
2655 /* Find the condition on which this switch statement depends. */
2656 cond = SWITCH_STMT_COND (switch_stack->switch_stmt);
2657 if (cond && TREE_CODE (cond) == TREE_LIST)
2658 cond = TREE_VALUE (cond);
2660 if (!check_switch_goto (switch_stack->level))
2661 return error_mark_node;
2663 r = c_add_case_label (switch_stack->cases, cond, TREE_TYPE (cond),
2664 low_value, high_value);
2666 /* After labels, make any new cleanups in the function go into their
2667 own new (temporary) binding contour. */
2668 for (p = current_binding_level;
2669 p->kind != sk_function_parms;
2671 p->more_cleanups_ok = 0;
2676 /* Hash a TYPENAME_TYPE. K is really of type `tree'. */
2679 typename_hash (const void* k)
2684 hash = (htab_hash_pointer (TYPE_CONTEXT (t))
2685 ^ htab_hash_pointer (DECL_NAME (TYPE_NAME (t))));
2690 typedef struct typename_info {
2698 /* Compare two TYPENAME_TYPEs. K1 and K2 are really of type `tree'. */
2701 typename_compare (const void * k1, const void * k2)
2704 const typename_info *t2;
2707 t2 = (const typename_info *) k2;
2709 return (DECL_NAME (TYPE_NAME (t1)) == t2->name
2710 && TYPE_CONTEXT (t1) == t2->scope
2711 && TYPENAME_TYPE_FULLNAME (t1) == t2->template_id
2712 && TYPENAME_IS_ENUM_P (t1) == t2->enum_p
2713 && TYPENAME_IS_CLASS_P (t1) == t2->class_p);
2716 /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
2717 the type of `T', NAME is the IDENTIFIER_NODE for `t'.
2719 Returns the new TYPENAME_TYPE. */
2721 static GTY ((param_is (union tree_node))) htab_t typename_htab;
2724 build_typename_type (tree context, tree name, tree fullname,
2725 enum tag_types tag_type)
2733 if (typename_htab == NULL)
2734 typename_htab = htab_create_ggc (61, &typename_hash,
2735 &typename_compare, NULL);
2737 ti.scope = FROB_CONTEXT (context);
2739 ti.template_id = fullname;
2740 ti.enum_p = tag_type == enum_type;
2741 ti.class_p = (tag_type == class_type
2742 || tag_type == record_type
2743 || tag_type == union_type);
2744 hash = (htab_hash_pointer (ti.scope)
2745 ^ htab_hash_pointer (ti.name));
2747 /* See if we already have this type. */
2748 e = htab_find_slot_with_hash (typename_htab, &ti, hash, INSERT);
2753 /* Build the TYPENAME_TYPE. */
2754 t = make_aggr_type (TYPENAME_TYPE);
2755 TYPE_CONTEXT (t) = ti.scope;
2756 TYPENAME_TYPE_FULLNAME (t) = ti.template_id;
2757 TYPENAME_IS_ENUM_P (t) = ti.enum_p;
2758 TYPENAME_IS_CLASS_P (t) = ti.class_p;
2760 /* Build the corresponding TYPE_DECL. */
2761 d = build_decl (TYPE_DECL, name, t);
2762 TYPE_NAME (TREE_TYPE (d)) = d;
2763 TYPE_STUB_DECL (TREE_TYPE (d)) = d;
2764 DECL_CONTEXT (d) = FROB_CONTEXT (context);
2765 DECL_ARTIFICIAL (d) = 1;
2767 /* Store it in the hash table. */
2774 /* Resolve `typename CONTEXT::NAME'. TAG_TYPE indicates the tag
2775 provided to name the type. Returns an appropriate type, unless an
2776 error occurs, in which case error_mark_node is returned. If we
2777 locate a non-artificial TYPE_DECL and TF_KEEP_TYPE_DECL is set, we
2778 return that, rather than the _TYPE it corresponds to, in other
2779 cases we look through the type decl. If TF_ERROR is set, complain
2780 about errors, otherwise be quiet. */
2783 make_typename_type (tree context, tree name, enum tag_types tag_type,
2784 tsubst_flags_t complain)
2790 if (name == error_mark_node
2791 || context == NULL_TREE
2792 || context == error_mark_node)
2793 return error_mark_node;
2797 if (!(TYPE_LANG_SPECIFIC (name)
2798 && (CLASSTYPE_IS_TEMPLATE (name)
2799 || CLASSTYPE_USE_TEMPLATE (name))))
2800 name = TYPE_IDENTIFIER (name);
2802 /* Create a TEMPLATE_ID_EXPR for the type. */
2803 name = build_nt (TEMPLATE_ID_EXPR,
2804 CLASSTYPE_TI_TEMPLATE (name),
2805 CLASSTYPE_TI_ARGS (name));
2807 else if (TREE_CODE (name) == TYPE_DECL)
2808 name = DECL_NAME (name);
2812 if (TREE_CODE (name) == TEMPLATE_ID_EXPR)
2814 name = TREE_OPERAND (name, 0);
2815 if (TREE_CODE (name) == TEMPLATE_DECL)
2816 name = TREE_OPERAND (fullname, 0) = DECL_NAME (name);
2818 if (TREE_CODE (name) == TEMPLATE_DECL)
2820 error ("%qD used without template parameters", name);
2821 return error_mark_node;
2823 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
2824 gcc_assert (TYPE_P (context));
2826 /* When the CONTEXT is a dependent type, NAME could refer to a
2827 dependent base class of CONTEXT. So we cannot peek inside it,
2828 even if CONTEXT is a currently open scope. */
2829 if (dependent_type_p (context))
2830 return build_typename_type (context, name, fullname, tag_type);
2832 if (!IS_AGGR_TYPE (context))
2834 if (complain & tf_error)
2835 error ("%q#T is not a class", context);
2836 return error_mark_node;
2839 want_template = TREE_CODE (fullname) == TEMPLATE_ID_EXPR;
2841 /* We should only set WANT_TYPE when we're a nested typename type.
2842 Then we can give better diagnostics if we find a non-type. */
2843 t = lookup_field (context, name, 0, /*want_type=*/true);
2846 if (complain & tf_error)
2847 error (want_template ? "no class template named %q#T in %q#T"
2848 : "no type named %q#T in %q#T", name, context);
2849 return error_mark_node;
2852 if (want_template && !DECL_CLASS_TEMPLATE_P (t))
2854 if (complain & tf_error)
2855 error ("%<typename %T::%D%> names %q#T, which is not a class template",
2857 return error_mark_node;
2859 if (!want_template && TREE_CODE (t) != TYPE_DECL)
2861 if (complain & tf_error)
2862 error ("%<typename %T::%D%> names %q#T, which is not a type",
2864 return error_mark_node;
2867 if (complain & tf_error)
2868 perform_or_defer_access_check (TYPE_BINFO (context), t, t);
2871 return lookup_template_class (t, TREE_OPERAND (fullname, 1),
2873 /*entering_scope=*/0,
2874 tf_warning_or_error | tf_user);
2876 if (DECL_ARTIFICIAL (t) || !(complain & tf_keep_type_decl))
2882 /* Resolve `CONTEXT::template NAME'. Returns a TEMPLATE_DECL if the name
2883 can be resolved or an UNBOUND_CLASS_TEMPLATE, unless an error occurs,
2884 in which case error_mark_node is returned.
2886 If PARM_LIST is non-NULL, also make sure that the template parameter
2887 list of TEMPLATE_DECL matches.
2889 If COMPLAIN zero, don't complain about any errors that occur. */
2892 make_unbound_class_template (tree context, tree name, tree parm_list,
2893 tsubst_flags_t complain)
2899 name = TYPE_IDENTIFIER (name);
2900 else if (DECL_P (name))
2901 name = DECL_NAME (name);
2902 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
2904 if (!dependent_type_p (context)
2905 || currently_open_class (context))
2907 tree tmpl = NULL_TREE;
2909 if (IS_AGGR_TYPE (context))
2910 tmpl = lookup_field (context, name, 0, false);
2912 if (!tmpl || !DECL_CLASS_TEMPLATE_P (tmpl))
2914 if (complain & tf_error)
2915 error ("no class template named %q#T in %q#T", name, context);
2916 return error_mark_node;
2920 && !comp_template_parms (DECL_TEMPLATE_PARMS (tmpl), parm_list))
2922 if (complain & tf_error)
2924 error ("template parameters do not match template");
2925 error ("%q+D declared here", tmpl);
2927 return error_mark_node;
2930 if (complain & tf_error)
2931 perform_or_defer_access_check (TYPE_BINFO (context), tmpl, tmpl);
2936 /* Build the UNBOUND_CLASS_TEMPLATE. */
2937 t = make_aggr_type (UNBOUND_CLASS_TEMPLATE);
2938 TYPE_CONTEXT (t) = FROB_CONTEXT (context);
2939 TREE_TYPE (t) = NULL_TREE;
2941 /* Build the corresponding TEMPLATE_DECL. */
2942 d = build_decl (TEMPLATE_DECL, name, t);
2943 TYPE_NAME (TREE_TYPE (d)) = d;
2944 TYPE_STUB_DECL (TREE_TYPE (d)) = d;
2945 DECL_CONTEXT (d) = FROB_CONTEXT (context);
2946 DECL_ARTIFICIAL (d) = 1;
2947 DECL_TEMPLATE_PARMS (d) = parm_list;
2954 /* Push the declarations of builtin types into the namespace.
2955 RID_INDEX is the index of the builtin type in the array
2956 RID_POINTERS. NAME is the name used when looking up the builtin
2957 type. TYPE is the _TYPE node for the builtin type. */
2960 record_builtin_type (enum rid rid_index,
2964 tree rname = NULL_TREE, tname = NULL_TREE;
2965 tree tdecl = NULL_TREE;
2967 if ((int) rid_index < (int) RID_MAX)
2968 rname = ridpointers[(int) rid_index];
2970 tname = get_identifier (name);
2972 /* The calls to SET_IDENTIFIER_GLOBAL_VALUE below should be
2973 eliminated. Built-in types should not be looked up name; their
2974 names are keywords that the parser can recognize. However, there
2975 is code in c-common.c that uses identifier_global_value to look
2976 up built-in types by name. */
2979 tdecl = build_decl (TYPE_DECL, tname, type);
2980 DECL_ARTIFICIAL (tdecl) = 1;
2981 SET_IDENTIFIER_GLOBAL_VALUE (tname, tdecl);
2987 tdecl = build_decl (TYPE_DECL, rname, type);
2988 DECL_ARTIFICIAL (tdecl) = 1;
2990 SET_IDENTIFIER_GLOBAL_VALUE (rname, tdecl);
2993 if (!TYPE_NAME (type))
2994 TYPE_NAME (type) = tdecl;
2997 debug_hooks->type_decl (tdecl, 0);
3000 /* Record one of the standard Java types.
3001 * Declare it as having the given NAME.
3002 * If SIZE > 0, it is the size of one of the integral types;
3003 * otherwise it is the negative of the size of one of the other types. */
3006 record_builtin_java_type (const char* name, int size)
3010 type = make_signed_type (size);
3011 else if (size > -32)
3012 { /* "__java_char" or ""__java_boolean". */
3013 type = make_unsigned_type (-size);
3014 /*if (size == -1) TREE_SET_CODE (type, BOOLEAN_TYPE);*/
3017 { /* "__java_float" or ""__java_double". */
3018 type = make_node (REAL_TYPE);
3019 TYPE_PRECISION (type) = - size;
3022 record_builtin_type (RID_MAX, name, type);
3023 decl = TYPE_NAME (type);
3025 /* Suppress generate debug symbol entries for these types,
3026 since for normal C++ they are just clutter.
3027 However, push_lang_context undoes this if extern "Java" is seen. */
3028 DECL_IGNORED_P (decl) = 1;
3030 TYPE_FOR_JAVA (type) = 1;
3034 /* Push a type into the namespace so that the back-ends ignore it. */
3037 record_unknown_type (tree type, const char* name)
3039 tree decl = pushdecl (build_decl (TYPE_DECL, get_identifier (name), type));
3040 /* Make sure the "unknown type" typedecl gets ignored for debug info. */
3041 DECL_IGNORED_P (decl) = 1;
3042 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
3043 TYPE_SIZE (type) = TYPE_SIZE (void_type_node);
3044 TYPE_ALIGN (type) = 1;
3045 TYPE_USER_ALIGN (type) = 0;
3046 TYPE_MODE (type) = TYPE_MODE (void_type_node);
3049 /* A string for which we should create an IDENTIFIER_NODE at
3052 typedef struct predefined_identifier
3054 /* The name of the identifier. */
3055 const char *const name;
3056 /* The place where the IDENTIFIER_NODE should be stored. */
3058 /* Nonzero if this is the name of a constructor or destructor. */
3059 const int ctor_or_dtor_p;
3060 } predefined_identifier;
3062 /* Create all the predefined identifiers. */
3065 initialize_predefined_identifiers (void)
3067 const predefined_identifier *pid;
3069 /* A table of identifiers to create at startup. */
3070 static const predefined_identifier predefined_identifiers[] = {
3071 { "C++", &lang_name_cplusplus, 0 },
3072 { "C", &lang_name_c, 0 },
3073 { "Java", &lang_name_java, 0 },
3074 /* Some of these names have a trailing space so that it is
3075 impossible for them to conflict with names written by users. */
3076 { "__ct ", &ctor_identifier, 1 },
3077 { "__base_ctor ", &base_ctor_identifier, 1 },
3078 { "__comp_ctor ", &complete_ctor_identifier, 1 },
3079 { "__dt ", &dtor_identifier, 1 },
3080 { "__comp_dtor ", &complete_dtor_identifier, 1 },
3081 { "__base_dtor ", &base_dtor_identifier, 1 },
3082 { "__deleting_dtor ", &deleting_dtor_identifier, 1 },
3083 { IN_CHARGE_NAME, &in_charge_identifier, 0 },
3084 { "nelts", &nelts_identifier, 0 },
3085 { THIS_NAME, &this_identifier, 0 },
3086 { VTABLE_DELTA_NAME, &delta_identifier, 0 },
3087 { VTABLE_PFN_NAME, &pfn_identifier, 0 },
3088 { "_vptr", &vptr_identifier, 0 },
3089 { "__vtt_parm", &vtt_parm_identifier, 0 },
3090 { "::", &global_scope_name, 0 },
3091 { "std", &std_identifier, 0 },
3095 for (pid = predefined_identifiers; pid->name; ++pid)
3097 *pid->node = get_identifier (pid->name);
3098 if (pid->ctor_or_dtor_p)
3099 IDENTIFIER_CTOR_OR_DTOR_P (*pid->node) = 1;
3103 /* Create the predefined scalar types of C,
3104 and some nodes representing standard constants (0, 1, (void *)0).
3105 Initialize the global binding level.
3106 Make definitions for built-in primitive functions. */
3109 cxx_init_decl_processing (void)
3112 tree void_ftype_ptr;
3114 build_common_tree_nodes (flag_signed_char, false);
3116 /* Create all the identifiers we need. */
3117 initialize_predefined_identifiers ();
3119 /* Create the global variables. */
3120 push_to_top_level ();
3122 current_function_decl = NULL_TREE;
3123 current_binding_level = NULL;
3124 /* Enter the global namespace. */
3125 gcc_assert (global_namespace == NULL_TREE);
3126 global_namespace = build_lang_decl (NAMESPACE_DECL, global_scope_name,
3128 TREE_PUBLIC (global_namespace) = 1;
3129 begin_scope (sk_namespace, global_namespace);
3131 current_lang_name = NULL_TREE;
3133 /* Adjust various flags based on command-line settings. */
3134 if (!flag_permissive)
3135 flag_pedantic_errors = 1;
3136 if (!flag_no_inline)
3138 flag_inline_trees = 1;
3141 if (flag_inline_functions)
3142 flag_inline_trees = 2;
3144 /* Force minimum function alignment if using the least significant
3145 bit of function pointers to store the virtual bit. */
3146 if (TARGET_PTRMEMFUNC_VBIT_LOCATION == ptrmemfunc_vbit_in_pfn
3147 && force_align_functions_log < 1)
3148 force_align_functions_log = 1;
3151 current_lang_name = lang_name_c;
3153 /* Create the `std' namespace. */
3154 push_namespace (std_identifier);
3155 std_node = current_namespace;
3158 c_common_nodes_and_builtins ();
3160 java_byte_type_node = record_builtin_java_type ("__java_byte", 8);
3161 java_short_type_node = record_builtin_java_type ("__java_short", 16);
3162 java_int_type_node = record_builtin_java_type ("__java_int", 32);
3163 java_long_type_node = record_builtin_java_type ("__java_long", 64);
3164 java_float_type_node = record_builtin_java_type ("__java_float", -32);
3165 java_double_type_node = record_builtin_java_type ("__java_double", -64);
3166 java_char_type_node = record_builtin_java_type ("__java_char", -16);
3167 java_boolean_type_node = record_builtin_java_type ("__java_boolean", -1);
3169 integer_two_node = build_int_cst (NULL_TREE, 2);
3170 integer_three_node = build_int_cst (NULL_TREE, 3);
3172 record_builtin_type (RID_BOOL, "bool", boolean_type_node);
3173 truthvalue_type_node = boolean_type_node;
3174 truthvalue_false_node = boolean_false_node;
3175 truthvalue_true_node = boolean_true_node;
3177 empty_except_spec = build_tree_list (NULL_TREE, NULL_TREE);
3180 record_builtin_type (RID_MAX, NULL, string_type_node);
3183 delta_type_node = ptrdiff_type_node;
3184 vtable_index_type = ptrdiff_type_node;
3186 vtt_parm_type = build_pointer_type (const_ptr_type_node);
3187 void_ftype = build_function_type (void_type_node, void_list_node);
3188 void_ftype_ptr = build_function_type (void_type_node,
3189 tree_cons (NULL_TREE,
3193 = build_exception_variant (void_ftype_ptr, empty_except_spec);
3195 /* C++ extensions */
3197 unknown_type_node = make_node (UNKNOWN_TYPE);
3198 record_unknown_type (unknown_type_node, "unknown type");
3200 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
3201 TREE_TYPE (unknown_type_node) = unknown_type_node;
3203 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
3205 TYPE_POINTER_TO (unknown_type_node) = unknown_type_node;
3206 TYPE_REFERENCE_TO (unknown_type_node) = unknown_type_node;
3209 /* Make sure we get a unique function type, so we can give
3210 its pointer type a name. (This wins for gdb.) */
3211 tree vfunc_type = make_node (FUNCTION_TYPE);
3212 TREE_TYPE (vfunc_type) = integer_type_node;
3213 TYPE_ARG_TYPES (vfunc_type) = NULL_TREE;
3214 layout_type (vfunc_type);
3216 vtable_entry_type = build_pointer_type (vfunc_type);
3218 record_builtin_type (RID_MAX, VTBL_PTR_TYPE, vtable_entry_type);
3221 = build_cplus_array_type (vtable_entry_type, NULL_TREE);
3222 layout_type (vtbl_type_node);
3223 vtbl_type_node = build_qualified_type (vtbl_type_node, TYPE_QUAL_CONST);
3224 record_builtin_type (RID_MAX, NULL, vtbl_type_node);
3225 vtbl_ptr_type_node = build_pointer_type (vtable_entry_type);
3226 layout_type (vtbl_ptr_type_node);
3227 record_builtin_type (RID_MAX, NULL, vtbl_ptr_type_node);
3229 push_namespace (get_identifier ("__cxxabiv1"));
3230 abi_node = current_namespace;
3233 global_type_node = make_node (LANG_TYPE);
3234 record_unknown_type (global_type_node, "global type");
3237 current_lang_name = lang_name_cplusplus;
3241 tree bad_alloc_type_node;
3242 tree bad_alloc_decl;
3243 tree newtype, deltype;
3244 tree ptr_ftype_sizetype;
3246 push_namespace (std_identifier);
3247 bad_alloc_id = get_identifier ("bad_alloc");
3248 bad_alloc_type_node = make_aggr_type (RECORD_TYPE);
3249 TYPE_CONTEXT (bad_alloc_type_node) = current_namespace;
3251 = create_implicit_typedef (bad_alloc_id, bad_alloc_type_node);
3252 DECL_CONTEXT (bad_alloc_decl) = current_namespace;
3253 TYPE_STUB_DECL (bad_alloc_type_node) = bad_alloc_decl;
3257 = build_function_type (ptr_type_node,
3258 tree_cons (NULL_TREE,
3261 newtype = build_exception_variant
3262 (ptr_ftype_sizetype, add_exception_specifier
3263 (NULL_TREE, bad_alloc_type_node, -1));
3264 deltype = build_exception_variant (void_ftype_ptr, empty_except_spec);
3265 push_cp_library_fn (NEW_EXPR, newtype);
3266 push_cp_library_fn (VEC_NEW_EXPR, newtype);
3267 global_delete_fndecl = push_cp_library_fn (DELETE_EXPR, deltype);
3268 push_cp_library_fn (VEC_DELETE_EXPR, deltype);
3272 = build_library_fn_ptr ("__cxa_pure_virtual", void_ftype);
3274 /* Perform other language dependent initializations. */
3275 init_class_processing ();
3276 init_rtti_processing ();
3278 if (flag_exceptions)
3279 init_exception_processing ();
3281 if (! supports_one_only ())
3284 make_fname_decl = cp_make_fname_decl;
3285 start_fname_decls ();
3287 /* Show we use EH for cleanups. */
3288 if (flag_exceptions)
3289 using_eh_for_cleanups ();
3292 /* Generate an initializer for a function naming variable from
3293 NAME. NAME may be NULL, to indicate a dependent name. TYPE_P is
3294 filled in with the type of the init. */
3297 cp_fname_init (const char* name, tree *type_p)
3299 tree domain = NULL_TREE;
3301 tree init = NULL_TREE;
3306 length = strlen (name);
3307 domain = build_index_type (size_int (length));
3308 init = build_string (length + 1, name);
3311 type = build_qualified_type (char_type_node, TYPE_QUAL_CONST);
3312 type = build_cplus_array_type (type, domain);
3317 TREE_TYPE (init) = type;
3319 init = error_mark_node;
3324 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give the
3325 decl, NAME is the initialization string and TYPE_DEP indicates whether
3326 NAME depended on the type of the function. We make use of that to detect
3327 __PRETTY_FUNCTION__ inside a template fn. This is being done
3328 lazily at the point of first use, so we mustn't push the decl now. */
3331 cp_make_fname_decl (tree id, int type_dep)
3333 const char *const name = (type_dep && processing_template_decl
3334 ? NULL : fname_as_string (type_dep));
3336 tree init = cp_fname_init (name, &type);
3337 tree decl = build_decl (VAR_DECL, id, type);
3340 free ((char *) name);
3342 /* As we're using pushdecl_with_scope, we must set the context. */
3343 DECL_CONTEXT (decl) = current_function_decl;
3344 DECL_PRETTY_FUNCTION_P (decl) = type_dep;
3346 TREE_STATIC (decl) = 1;
3347 TREE_READONLY (decl) = 1;
3348 DECL_ARTIFICIAL (decl) = 1;
3350 TREE_USED (decl) = 1;
3352 if (current_function_decl)
3354 struct cp_binding_level *b = current_binding_level;
3355 while (b->level_chain->kind != sk_function_parms)
3357 pushdecl_with_scope (decl, b, /*is_friend=*/false);
3358 cp_finish_decl (decl, init, /*init_const_expr_p=*/false, NULL_TREE,
3359 LOOKUP_ONLYCONVERTING);
3362 pushdecl_top_level_and_finish (decl, init);
3368 builtin_function_1 (tree decl, tree context)
3370 tree id = DECL_NAME (decl);
3371 const char *name = IDENTIFIER_POINTER (id);
3373 retrofit_lang_decl (decl);
3375 /* All nesting of C++ functions is lexical; there is never a "static
3376 chain" in the sense of GNU C nested functions. */
3377 DECL_NO_STATIC_CHAIN (decl) = 1;
3379 DECL_ARTIFICIAL (decl) = 1;
3380 SET_OVERLOADED_OPERATOR_CODE (decl, ERROR_MARK);
3381 SET_DECL_LANGUAGE (decl, lang_c);
3382 /* Runtime library routines are, by definition, available in an
3383 external shared object. */
3384 DECL_VISIBILITY (decl) = VISIBILITY_DEFAULT;
3385 DECL_VISIBILITY_SPECIFIED (decl) = 1;
3387 DECL_CONTEXT (decl) = context;
3391 /* A function in the user's namespace should have an explicit
3392 declaration before it is used. Mark the built-in function as
3393 anticipated but not actually declared. */
3394 if (name[0] != '_' || name[1] != '_')
3395 DECL_ANTICIPATED (decl) = 1;
3401 cxx_builtin_function (tree decl)
3403 tree id = DECL_NAME (decl);
3404 const char *name = IDENTIFIER_POINTER (id);
3405 tree decl2 = copy_node(decl);
3406 /* All builtins that don't begin with an '_' should additionally
3407 go in the 'std' namespace. */
3410 push_namespace (std_identifier);
3411 builtin_function_1 (decl, std_node);
3415 return builtin_function_1 (decl2, NULL_TREE);
3418 /* Generate a FUNCTION_DECL with the typical flags for a runtime library
3419 function. Not called directly. */
3422 build_library_fn_1 (tree name, enum tree_code operator_code, tree type)
3424 tree fn = build_lang_decl (FUNCTION_DECL, name, type);
3425 DECL_EXTERNAL (fn) = 1;
3426 TREE_PUBLIC (fn) = 1;
3427 DECL_ARTIFICIAL (fn) = 1;
3428 SET_OVERLOADED_OPERATOR_CODE (fn, operator_code);
3429 SET_DECL_LANGUAGE (fn, lang_c);
3430 /* Runtime library routines are, by definition, available in an
3431 external shared object. */
3432 DECL_VISIBILITY (fn) = VISIBILITY_DEFAULT;
3433 DECL_VISIBILITY_SPECIFIED (fn) = 1;
3437 /* Returns the _DECL for a library function with C linkage.
3438 We assume that such functions never throw; if this is incorrect,
3439 callers should unset TREE_NOTHROW. */
3442 build_library_fn (tree name, tree type)
3444 tree fn = build_library_fn_1 (name, ERROR_MARK, type);
3445 TREE_NOTHROW (fn) = 1;
3449 /* Returns the _DECL for a library function with C++ linkage. */
3452 build_cp_library_fn (tree name, enum tree_code operator_code, tree type)
3454 tree fn = build_library_fn_1 (name, operator_code, type);
3455 TREE_NOTHROW (fn) = TYPE_NOTHROW_P (type);
3456 DECL_CONTEXT (fn) = FROB_CONTEXT (current_namespace);
3457 SET_DECL_LANGUAGE (fn, lang_cplusplus);
3461 /* Like build_library_fn, but takes a C string instead of an
3465 build_library_fn_ptr (const char* name, tree type)
3467 return build_library_fn (get_identifier (name), type);
3470 /* Like build_cp_library_fn, but takes a C string instead of an
3474 build_cp_library_fn_ptr (const char* name, tree type)
3476 return build_cp_library_fn (get_identifier (name), ERROR_MARK, type);
3479 /* Like build_library_fn, but also pushes the function so that we will
3480 be able to find it via IDENTIFIER_GLOBAL_VALUE. */
3483 push_library_fn (tree name, tree type)
3485 tree fn = build_library_fn (name, type);
3486 pushdecl_top_level (fn);
3490 /* Like build_cp_library_fn, but also pushes the function so that it
3491 will be found by normal lookup. */
3494 push_cp_library_fn (enum tree_code operator_code, tree type)
3496 tree fn = build_cp_library_fn (ansi_opname (operator_code),
3503 /* Like push_library_fn, but takes a TREE_LIST of parm types rather than
3507 push_void_library_fn (tree name, tree parmtypes)
3509 tree type = build_function_type (void_type_node, parmtypes);
3510 return push_library_fn (name, type);
3513 /* Like push_library_fn, but also note that this function throws
3514 and does not return. Used for __throw_foo and the like. */
3517 push_throw_library_fn (tree name, tree type)
3519 tree fn = push_library_fn (name, type);
3520 TREE_THIS_VOLATILE (fn) = 1;
3521 TREE_NOTHROW (fn) = 0;
3525 /* When we call finish_struct for an anonymous union, we create
3526 default copy constructors and such. But, an anonymous union
3527 shouldn't have such things; this function undoes the damage to the
3528 anonymous union type T.
3530 (The reason that we create the synthesized methods is that we don't
3531 distinguish `union { int i; }' from `typedef union { int i; } U'.
3532 The first is an anonymous union; the second is just an ordinary
3536 fixup_anonymous_aggr (tree t)
3540 /* Wipe out memory of synthesized methods. */
3541 TYPE_HAS_CONSTRUCTOR (t) = 0;
3542 TYPE_HAS_DEFAULT_CONSTRUCTOR (t) = 0;
3543 TYPE_HAS_INIT_REF (t) = 0;
3544 TYPE_HAS_CONST_INIT_REF (t) = 0;
3545 TYPE_HAS_ASSIGN_REF (t) = 0;
3546 TYPE_HAS_CONST_ASSIGN_REF (t) = 0;
3548 /* Splice the implicitly generated functions out of the TYPE_METHODS
3550 q = &TYPE_METHODS (t);
3553 if (DECL_ARTIFICIAL (*q))
3554 *q = TREE_CHAIN (*q);
3556 q = &TREE_CHAIN (*q);
3559 /* ISO C++ 9.5.3. Anonymous unions may not have function members. */
3560 if (TYPE_METHODS (t))
3561 error ("%Jan anonymous union cannot have function members",
3562 TYPE_MAIN_DECL (t));
3564 /* Anonymous aggregates cannot have fields with ctors, dtors or complex
3565 assignment operators (because they cannot have these methods themselves).
3566 For anonymous unions this is already checked because they are not allowed
3567 in any union, otherwise we have to check it. */
3568 if (TREE_CODE (t) != UNION_TYPE)
3572 for (field = TYPE_FIELDS (t); field; field = TREE_CHAIN (field))
3573 if (TREE_CODE (field) == FIELD_DECL)
3575 type = TREE_TYPE (field);
3576 if (CLASS_TYPE_P (type))
3578 if (TYPE_NEEDS_CONSTRUCTING (type))
3579 error ("member %q+#D with constructor not allowed "
3580 "in anonymous aggregate", field);
3581 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
3582 error ("member %q+#D with destructor not allowed "
3583 "in anonymous aggregate", field);
3584 if (TYPE_HAS_COMPLEX_ASSIGN_REF (type))
3585 error ("member %q+#D with copy assignment operator "
3586 "not allowed in anonymous aggregate", field);
3592 /* Make sure that a declaration with no declarator is well-formed, i.e.
3593 just declares a tagged type or anonymous union.
3595 Returns the type declared; or NULL_TREE if none. */
3598 check_tag_decl (cp_decl_specifier_seq *declspecs)
3600 int saw_friend = declspecs->specs[(int)ds_friend] != 0;
3601 int saw_typedef = declspecs->specs[(int)ds_typedef] != 0;
3602 /* If a class, struct, or enum type is declared by the DECLSPECS
3603 (i.e, if a class-specifier, enum-specifier, or non-typename
3604 elaborated-type-specifier appears in the DECLSPECS),
3605 DECLARED_TYPE is set to the corresponding type. */
3606 tree declared_type = NULL_TREE;
3607 bool error_p = false;
3609 if (declspecs->multiple_types_p)
3610 error ("multiple types in one declaration");
3611 else if (declspecs->redefined_builtin_type)
3613 if (!in_system_header)
3614 pedwarn ("redeclaration of C++ built-in type %qT",
3615 declspecs->redefined_builtin_type);
3620 && TYPE_P (declspecs->type)
3621 && ((TREE_CODE (declspecs->type) != TYPENAME_TYPE
3622 && IS_AGGR_TYPE (declspecs->type))
3623 || TREE_CODE (declspecs->type) == ENUMERAL_TYPE))
3624 declared_type = declspecs->type;
3625 else if (declspecs->type == error_mark_node)
3627 if (declared_type == NULL_TREE && ! saw_friend && !error_p)
3628 pedwarn ("declaration does not declare anything");
3629 /* Check for an anonymous union. */
3630 else if (declared_type && IS_AGGR_TYPE_CODE (TREE_CODE (declared_type))
3631 && TYPE_ANONYMOUS_P (declared_type))
3633 /* 7/3 In a simple-declaration, the optional init-declarator-list
3634 can be omitted only when declaring a class (clause 9) or
3635 enumeration (7.2), that is, when the decl-specifier-seq contains
3636 either a class-specifier, an elaborated-type-specifier with
3637 a class-key (9.1), or an enum-specifier. In these cases and
3638 whenever a class-specifier or enum-specifier is present in the
3639 decl-specifier-seq, the identifiers in these specifiers are among
3640 the names being declared by the declaration (as class-name,
3641 enum-names, or enumerators, depending on the syntax). In such
3642 cases, and except for the declaration of an unnamed bit-field (9.6),
3643 the decl-specifier-seq shall introduce one or more names into the
3644 program, or shall redeclare a name introduced by a previous
3645 declaration. [Example:
3646 enum { }; // ill-formed
3647 typedef class { }; // ill-formed
3651 error ("missing type-name in typedef-declaration");
3654 /* Anonymous unions are objects, so they can have specifiers. */;
3655 SET_ANON_AGGR_TYPE_P (declared_type);
3657 if (TREE_CODE (declared_type) != UNION_TYPE && pedantic
3658 && !in_system_header)
3659 pedwarn ("ISO C++ prohibits anonymous structs");
3664 if (declspecs->specs[(int)ds_inline]
3665 || declspecs->specs[(int)ds_virtual])
3666 error ("%qs can only be specified for functions",
3667 declspecs->specs[(int)ds_inline]
3668 ? "inline" : "virtual");
3670 && (!current_class_type
3671 || current_scope () != current_class_type))
3672 error ("%<friend%> can only be specified inside a class");
3673 else if (declspecs->specs[(int)ds_explicit])
3674 error ("%<explicit%> can only be specified for constructors");
3675 else if (declspecs->storage_class)
3676 error ("a storage class can only be specified for objects "
3678 else if (declspecs->specs[(int)ds_const]
3679 || declspecs->specs[(int)ds_volatile]
3680 || declspecs->specs[(int)ds_restrict]
3681 || declspecs->specs[(int)ds_thread])
3682 error ("qualifiers can only be specified for objects "
3686 return declared_type;
3689 /* Called when a declaration is seen that contains no names to declare.
3690 If its type is a reference to a structure, union or enum inherited
3691 from a containing scope, shadow that tag name for the current scope
3692 with a forward reference.
3693 If its type defines a new named structure or union
3694 or defines an enum, it is valid but we need not do anything here.
3695 Otherwise, it is an error.
3697 C++: may have to grok the declspecs to learn about static,
3698 complain for anonymous unions.
3700 Returns the TYPE declared -- or NULL_TREE if none. */
3703 shadow_tag (cp_decl_specifier_seq *declspecs)
3705 tree t = check_tag_decl (declspecs);
3710 if (declspecs->attributes)
3712 warning (0, "attribute ignored in declaration of %q+#T", t);
3713 warning (0, "attribute for %q+#T must follow the %qs keyword",
3714 t, class_key_or_enum_as_string (t));
3718 if (maybe_process_partial_specialization (t) == error_mark_node)
3721 /* This is where the variables in an anonymous union are
3722 declared. An anonymous union declaration looks like:
3724 because there is no declarator after the union, the parser
3725 sends that declaration here. */
3726 if (ANON_AGGR_TYPE_P (t))
3728 fixup_anonymous_aggr (t);
3730 if (TYPE_FIELDS (t))
3732 tree decl = grokdeclarator (/*declarator=*/NULL,
3733 declspecs, NORMAL, 0, NULL);
3734 finish_anon_union (decl);
3741 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
3744 groktypename (cp_decl_specifier_seq *type_specifiers,
3745 const cp_declarator *declarator)
3749 attrs = type_specifiers->attributes;
3750 type_specifiers->attributes = NULL_TREE;
3751 type = grokdeclarator (declarator, type_specifiers, TYPENAME, 0, &attrs);
3753 cplus_decl_attributes (&type, attrs, 0);
3757 /* Decode a declarator in an ordinary declaration or data definition.
3758 This is called as soon as the type information and variable name
3759 have been parsed, before parsing the initializer if any.
3760 Here we create the ..._DECL node, fill in its type,
3761 and put it on the list of decls for the current context.
3762 The ..._DECL node is returned as the value.
3764 Exception: for arrays where the length is not specified,
3765 the type is left null, to be filled in by `cp_finish_decl'.
3767 Function definitions do not come here; they go to start_function
3768 instead. However, external and forward declarations of functions
3769 do go through here. Structure field declarations are done by
3770 grokfield and not through here. */
3773 start_decl (const cp_declarator *declarator,
3774 cp_decl_specifier_seq *declspecs,
3777 tree prefix_attributes,
3778 tree *pushed_scope_p)
3784 *pushed_scope_p = NULL_TREE;
3786 /* An object declared as __attribute__((deprecated)) suppresses
3787 warnings of uses of other deprecated items. */
3788 if (lookup_attribute ("deprecated", attributes))
3789 deprecated_state = DEPRECATED_SUPPRESS;
3791 attributes = chainon (attributes, prefix_attributes);
3793 decl = grokdeclarator (declarator, declspecs, NORMAL, initialized,
3796 deprecated_state = DEPRECATED_NORMAL;
3798 if (decl == NULL_TREE || TREE_CODE (decl) == VOID_TYPE
3799 || decl == error_mark_node)
3800 return error_mark_node;
3802 type = TREE_TYPE (decl);
3804 context = DECL_CONTEXT (decl);
3808 *pushed_scope_p = push_scope (context);
3810 /* We are only interested in class contexts, later. */
3811 if (TREE_CODE (context) == NAMESPACE_DECL)
3812 context = NULL_TREE;
3816 /* Is it valid for this decl to have an initializer at all?
3817 If not, set INITIALIZED to zero, which will indirectly
3818 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
3819 switch (TREE_CODE (decl))
3822 error ("typedef %qD is initialized (use __typeof__ instead)", decl);
3823 return error_mark_node;
3826 error ("function %q#D is initialized like a variable", decl);
3827 return error_mark_node;
3835 if (! toplevel_bindings_p ()
3836 && DECL_EXTERNAL (decl))
3837 warning (0, "declaration of %q#D has %<extern%> and is initialized",
3839 DECL_EXTERNAL (decl) = 0;
3840 if (toplevel_bindings_p ())
3841 TREE_STATIC (decl) = 1;
3844 /* Set attributes here so if duplicate decl, will have proper attributes. */
3845 cplus_decl_attributes (&decl, attributes, 0);
3847 /* Dllimported symbols cannot be defined. Static data members (which
3848 can be initialized in-class and dllimported) go through grokfield,
3849 not here, so we don't need to exclude those decls when checking for
3851 if (initialized && DECL_DLLIMPORT_P (decl))
3853 error ("definition of %q#D is marked %<dllimport%>", decl);
3854 DECL_DLLIMPORT_P (decl) = 0;
3857 /* If #pragma weak was used, mark the decl weak now. */
3858 maybe_apply_pragma_weak (decl);
3860 if (TREE_CODE (decl) == FUNCTION_DECL
3861 && DECL_DECLARED_INLINE_P (decl)
3862 && DECL_UNINLINABLE (decl)
3863 && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl)))
3864 warning (0, "inline function %q+D given attribute noinline", decl);
3866 if (context && COMPLETE_TYPE_P (complete_type (context)))
3868 if (TREE_CODE (decl) == VAR_DECL)
3870 tree field = lookup_field (context, DECL_NAME (decl), 0, false);
3871 if (field == NULL_TREE || TREE_CODE (field) != VAR_DECL)
3872 error ("%q#D is not a static member of %q#T", decl, context);
3875 if (DECL_CONTEXT (field) != context)
3877 if (!same_type_p (DECL_CONTEXT (field), context))
3878 pedwarn ("ISO C++ does not permit %<%T::%D%> "
3879 "to be defined as %<%T::%D%>",
3880 DECL_CONTEXT (field), DECL_NAME (decl),
3881 context, DECL_NAME (decl));
3882 DECL_CONTEXT (decl) = DECL_CONTEXT (field);
3884 if (processing_specialization
3885 && template_class_depth (context) == 0
3886 && CLASSTYPE_TEMPLATE_SPECIALIZATION (context))
3887 error ("template header not allowed in member definition "
3888 "of explicitly specialized class");
3889 /* Static data member are tricky; an in-class initialization
3890 still doesn't provide a definition, so the in-class
3891 declaration will have DECL_EXTERNAL set, but will have an
3892 initialization. Thus, duplicate_decls won't warn
3893 about this situation, and so we check here. */
3894 if (initialized && DECL_INITIALIZED_IN_CLASS_P (field))
3895 error ("duplicate initialization of %qD", decl);
3896 if (duplicate_decls (decl, field, /*newdecl_is_friend=*/false))
3902 tree field = check_classfn (context, decl,
3903 (processing_template_decl
3904 > template_class_depth (context))
3905 ? current_template_parms
3907 if (field && duplicate_decls (decl, field,
3908 /*newdecl_is_friend=*/false))
3912 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
3913 DECL_IN_AGGR_P (decl) = 0;
3914 /* Do not mark DECL as an explicit specialization if it was not
3915 already marked as an instantiation; a declaration should
3916 never be marked as a specialization unless we know what
3917 template is being specialized. */
3918 if (DECL_LANG_SPECIFIC (decl) && DECL_USE_TEMPLATE (decl))
3920 SET_DECL_TEMPLATE_SPECIALIZATION (decl);
3922 /* [temp.expl.spec] An explicit specialization of a static data
3923 member of a template is a definition if the declaration
3924 includes an initializer; otherwise, it is a declaration.
3926 We check for processing_specialization so this only applies
3927 to the new specialization syntax. */
3928 if (!initialized && processing_specialization)
3929 DECL_EXTERNAL (decl) = 1;
3932 if (DECL_EXTERNAL (decl) && ! DECL_TEMPLATE_SPECIALIZATION (decl))
3933 pedwarn ("declaration of %q#D outside of class is not definition",
3937 /* Enter this declaration into the symbol table. */
3938 tem = maybe_push_decl (decl);
3940 if (processing_template_decl)
3941 tem = push_template_decl (tem);
3942 if (tem == error_mark_node)
3943 return error_mark_node;
3945 /* Tell the back-end to use or not use .common as appropriate. If we say
3946 -fconserve-space, we want this to save .data space, at the expense of
3947 wrong semantics. If we say -fno-conserve-space, we want this to
3948 produce errors about redefs; to do this we force variables into the
3950 if (flag_conserve_space
3951 && TREE_CODE (tem) == VAR_DECL
3952 && TREE_PUBLIC (tem)
3953 && !DECL_THREAD_LOCAL_P (tem)
3954 && !have_global_bss_p ())
3955 DECL_COMMON (tem) = 1;
3957 if (!processing_template_decl && TREE_CODE (tem) == VAR_DECL)
3958 start_decl_1 (tem, initialized);
3964 start_decl_1 (tree decl, bool initialized)
3968 gcc_assert (!processing_template_decl);
3970 if (error_operand_p (decl))
3973 gcc_assert (TREE_CODE (decl) == VAR_DECL);
3974 type = TREE_TYPE (decl);
3977 /* Is it valid for this decl to have an initializer at all?
3978 If not, set INITIALIZED to zero, which will indirectly
3979 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
3981 /* Don't allow initializations for incomplete types except for
3982 arrays which might be completed by the initialization. */
3983 if (COMPLETE_TYPE_P (complete_type (type)))
3984 ; /* A complete type is ok. */
3985 else if (TREE_CODE (type) != ARRAY_TYPE)
3987 error ("variable %q#D has initializer but incomplete type", decl);
3989 type = TREE_TYPE (decl) = error_mark_node;
3991 else if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (type))))
3993 if (DECL_LANG_SPECIFIC (decl) && DECL_TEMPLATE_INFO (decl))
3994 error ("elements of array %q#D have incomplete type", decl);
3995 /* else we already gave an error in start_decl. */
3999 else if (IS_AGGR_TYPE (type)
4000 && ! DECL_EXTERNAL (decl))
4002 if (!COMPLETE_TYPE_P (complete_type (type)))
4004 error ("aggregate %q#D has incomplete type and cannot be defined",
4006 /* Change the type so that assemble_variable will give
4007 DECL an rtl we can live with: (mem (const_int 0)). */
4008 type = TREE_TYPE (decl) = error_mark_node;
4012 /* If any base type in the hierarchy of TYPE needs a constructor,
4013 then we set initialized to 1. This way any nodes which are
4014 created for the purposes of initializing this aggregate
4015 will live as long as it does. This is necessary for global
4016 aggregates which do not have their initializers processed until
4017 the end of the file. */
4018 initialized = TYPE_NEEDS_CONSTRUCTING (type);
4022 /* Create a new scope to hold this declaration if necessary.
4023 Whether or not a new scope is necessary cannot be determined
4024 until after the type has been completed; if the type is a
4025 specialization of a class template it is not until after
4026 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
4027 will be set correctly. */
4028 maybe_push_cleanup_level (type);
4031 /* Handle initialization of references. DECL, TYPE, and INIT have the
4032 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
4033 but will be set to a new CLEANUP_STMT if a temporary is created
4034 that must be destroyed subsequently.
4036 Returns an initializer expression to use to initialize DECL, or
4037 NULL if the initialization can be performed statically.
4039 Quotes on semantics can be found in ARM 8.4.3. */
4042 grok_reference_init (tree decl, tree type, tree init, tree *cleanup)
4046 if (init == NULL_TREE)
4048 if ((DECL_LANG_SPECIFIC (decl) == 0
4049 || DECL_IN_AGGR_P (decl) == 0)
4050 && ! DECL_THIS_EXTERN (decl))
4051 error ("%qD declared as reference but not initialized", decl);
4055 if (TREE_CODE (init) == CONSTRUCTOR)
4057 error ("ISO C++ forbids use of initializer list to "
4058 "initialize reference %qD", decl);
4062 if (TREE_CODE (init) == TREE_LIST)
4063 init = build_x_compound_expr_from_list (init, "initializer");
4065 if (TREE_CODE (TREE_TYPE (type)) != ARRAY_TYPE
4066 && TREE_CODE (TREE_TYPE (init)) == ARRAY_TYPE)
4067 /* Note: default conversion is only called in very special cases. */
4068 init = decay_conversion (init);
4070 /* Convert INIT to the reference type TYPE. This may involve the
4071 creation of a temporary, whose lifetime must be the same as that
4072 of the reference. If so, a DECL_EXPR for the temporary will be
4073 added just after the DECL_EXPR for DECL. That's why we don't set
4074 DECL_INITIAL for local references (instead assigning to them
4075 explicitly); we need to allow the temporary to be initialized
4077 tmp = initialize_reference (type, init, decl, cleanup);
4079 if (tmp == error_mark_node)
4081 else if (tmp == NULL_TREE)
4083 error ("cannot initialize %qT from %qT", type, TREE_TYPE (init));
4087 if (TREE_STATIC (decl) && !TREE_CONSTANT (tmp))
4090 DECL_INITIAL (decl) = tmp;
4095 /* Designated initializers in arrays are not supported in GNU C++.
4096 The parser cannot detect this error since it does not know whether
4097 a given brace-enclosed initializer is for a class type or for an
4098 array. This function checks that CE does not use a designated
4099 initializer. If it does, an error is issued. Returns true if CE
4100 is valid, i.e., does not have a designated initializer. */
4103 check_array_designated_initializer (const constructor_elt *ce)
4105 /* Designated initializers for array elements arenot supported. */
4108 /* The parser only allows identifiers as designated
4110 gcc_assert (TREE_CODE (ce->index) == IDENTIFIER_NODE);
4111 error ("name %qD used in a GNU-style designated "
4112 "initializer for an array", ce->index);
4119 /* When parsing `int a[] = {1, 2};' we don't know the size of the
4120 array until we finish parsing the initializer. If that's the
4121 situation we're in, update DECL accordingly. */
4124 maybe_deduce_size_from_array_init (tree decl, tree init)
4126 tree type = TREE_TYPE (decl);
4128 if (TREE_CODE (type) == ARRAY_TYPE
4129 && TYPE_DOMAIN (type) == NULL_TREE
4130 && TREE_CODE (decl) != TYPE_DECL)
4132 /* do_default is really a C-ism to deal with tentative definitions.
4133 But let's leave it here to ease the eventual merge. */
4134 int do_default = !DECL_EXTERNAL (decl);
4135 tree initializer = init ? init : DECL_INITIAL (decl);
4138 /* Check that there are no designated initializers in INIT, as
4139 those are not supported in GNU C++, and as the middle-end
4140 will crash if presented with a non-numeric designated
4142 if (initializer && TREE_CODE (initializer) == CONSTRUCTOR)
4144 VEC(constructor_elt,gc) *v = CONSTRUCTOR_ELTS (initializer);
4145 constructor_elt *ce;
4148 VEC_iterate (constructor_elt, v, i, ce);
4150 if (!check_array_designated_initializer (ce))
4156 failure = cp_complete_array_type (&TREE_TYPE (decl), initializer,
4160 error ("initializer fails to determine size of %qD", decl);
4161 TREE_TYPE (decl) = error_mark_node;
4163 else if (failure == 2)
4167 error ("array size missing in %qD", decl);
4168 TREE_TYPE (decl) = error_mark_node;
4170 /* If a `static' var's size isn't known, make it extern as
4171 well as static, so it does not get allocated. If it's not
4172 `static', then don't mark it extern; finish_incomplete_decl
4173 will give it a default size and it will get allocated. */
4174 else if (!pedantic && TREE_STATIC (decl) && !TREE_PUBLIC (decl))
4175 DECL_EXTERNAL (decl) = 1;
4177 else if (failure == 3)
4179 error ("zero-size array %qD", decl);
4180 TREE_TYPE (decl) = error_mark_node;
4184 cp_apply_type_quals_to_decl (cp_type_quals (TREE_TYPE (decl)), decl);
4186 layout_decl (decl, 0);
4190 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
4191 any appropriate error messages regarding the layout. */
4194 layout_var_decl (tree decl)
4198 type = TREE_TYPE (decl);
4199 if (type == error_mark_node)
4202 /* If we haven't already layed out this declaration, do so now.
4203 Note that we must not call complete type for an external object
4204 because it's type might involve templates that we are not
4205 supposed to instantiate yet. (And it's perfectly valid to say
4206 `extern X x' for some incomplete type `X'.) */
4207 if (!DECL_EXTERNAL (decl))
4208 complete_type (type);
4209 if (!DECL_SIZE (decl)
4210 && TREE_TYPE (decl) != error_mark_node
4211 && (COMPLETE_TYPE_P (type)
4212 || (TREE_CODE (type) == ARRAY_TYPE
4213 && !TYPE_DOMAIN (type)
4214 && COMPLETE_TYPE_P (TREE_TYPE (type)))))
4215 layout_decl (decl, 0);
4217 if (!DECL_EXTERNAL (decl) && DECL_SIZE (decl) == NULL_TREE)
4219 /* An automatic variable with an incomplete type: that is an error.
4220 Don't talk about array types here, since we took care of that
4221 message in grokdeclarator. */
4222 error ("storage size of %qD isn't known", decl);
4223 TREE_TYPE (decl) = error_mark_node;
4226 /* Keep this code around in case we later want to control debug info
4227 based on whether a type is "used". (jason 1999-11-11) */
4229 else if (!DECL_EXTERNAL (decl) && IS_AGGR_TYPE (ttype))
4230 /* Let debugger know it should output info for this type. */
4231 note_debug_info_needed (ttype);
4233 if (TREE_STATIC (decl) && DECL_CLASS_SCOPE_P (decl))
4234 note_debug_info_needed (DECL_CONTEXT (decl));
4237 if ((DECL_EXTERNAL (decl) || TREE_STATIC (decl))
4238 && DECL_SIZE (decl) != NULL_TREE
4239 && ! TREE_CONSTANT (DECL_SIZE (decl)))
4241 if (TREE_CODE (DECL_SIZE (decl)) == INTEGER_CST)
4242 constant_expression_warning (DECL_SIZE (decl));
4244 error ("storage size of %qD isn't constant", decl);
4248 /* If a local static variable is declared in an inline function, or if
4249 we have a weak definition, we must endeavor to create only one
4250 instance of the variable at link-time. */
4253 maybe_commonize_var (tree decl)
4255 /* Static data in a function with comdat linkage also has comdat
4257 if (TREE_STATIC (decl)
4258 /* Don't mess with __FUNCTION__. */
4259 && ! DECL_ARTIFICIAL (decl)
4260 && DECL_FUNCTION_SCOPE_P (decl)
4261 /* Unfortunately, import_export_decl has not always been called
4262 before the function is processed, so we cannot simply check
4264 && (DECL_COMDAT (DECL_CONTEXT (decl))
4265 || ((DECL_DECLARED_INLINE_P (DECL_CONTEXT (decl))
4266 || DECL_TEMPLATE_INSTANTIATION (DECL_CONTEXT (decl)))
4267 && TREE_PUBLIC (DECL_CONTEXT (decl)))))
4271 /* With weak symbols, we simply make the variable COMDAT;
4272 that will cause copies in multiple translations units to
4274 comdat_linkage (decl);
4278 if (DECL_INITIAL (decl) == NULL_TREE
4279 || DECL_INITIAL (decl) == error_mark_node)
4281 /* Without weak symbols, we can use COMMON to merge
4282 uninitialized variables. */
4283 TREE_PUBLIC (decl) = 1;
4284 DECL_COMMON (decl) = 1;
4288 /* While for initialized variables, we must use internal
4289 linkage -- which means that multiple copies will not
4291 TREE_PUBLIC (decl) = 0;
4292 DECL_COMMON (decl) = 0;
4293 warning (0, "sorry: semantics of inline function static "
4294 "data %q+#D are wrong (you'll wind up "
4295 "with multiple copies)", decl);
4296 warning (0, "%J you can work around this by removing "
4302 else if (DECL_LANG_SPECIFIC (decl) && DECL_COMDAT (decl))
4303 /* Set it up again; we might have set DECL_INITIAL since the last
4305 comdat_linkage (decl);
4308 /* Issue an error message if DECL is an uninitialized const variable. */
4311 check_for_uninitialized_const_var (tree decl)
4313 tree type = TREE_TYPE (decl);
4315 /* ``Unless explicitly declared extern, a const object does not have
4316 external linkage and must be initialized. ($8.4; $12.1)'' ARM
4318 if (TREE_CODE (decl) == VAR_DECL
4319 && TREE_CODE (type) != REFERENCE_TYPE
4320 && CP_TYPE_CONST_P (type)
4321 && !TYPE_NEEDS_CONSTRUCTING (type)
4322 && !DECL_INITIAL (decl))
4323 error ("uninitialized const %qD", decl);
4327 /* Structure holding the current initializer being processed by reshape_init.
4328 CUR is a pointer to the current element being processed, END is a pointer
4329 after the last element present in the initializer. */
4330 typedef struct reshape_iterator_t
4332 constructor_elt *cur;
4333 constructor_elt *end;
4336 static tree reshape_init_r (tree, reshape_iter *, bool);
4338 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
4339 returned is the next FIELD_DECL (possibly FIELD itself) that can be
4340 initialized. If there are no more such fields, the return value
4344 next_initializable_field (tree field)
4347 && (TREE_CODE (field) != FIELD_DECL
4348 || (DECL_C_BIT_FIELD (field) && !DECL_NAME (field))
4349 || DECL_ARTIFICIAL (field)))
4350 field = TREE_CHAIN (field);
4355 /* Subroutine of reshape_init_array and reshape_init_vector, which does
4356 the actual work. ELT_TYPE is the element type of the array. MAX_INDEX is an
4357 INTEGER_CST representing the size of the array minus one (the maximum index),
4358 or NULL_TREE if the array was declared without specifying the size. D is
4359 the iterator within the constructor. */
4362 reshape_init_array_1 (tree elt_type, tree max_index, reshape_iter *d)
4365 bool sized_array_p = (max_index != NULL_TREE);
4366 unsigned HOST_WIDE_INT max_index_cst = 0;
4367 unsigned HOST_WIDE_INT index;
4369 /* The initializer for an array is always a CONSTRUCTOR. */
4370 new_init = build_constructor (NULL_TREE, NULL);
4374 /* Minus 1 is used for zero sized arrays. */
4375 if (integer_all_onesp (max_index))
4378 if (host_integerp (max_index, 1))
4379 max_index_cst = tree_low_cst (max_index, 1);
4380 /* sizetype is sign extended, not zero extended. */
4382 max_index_cst = tree_low_cst (fold_convert (size_type_node, max_index),
4386 /* Loop until there are no more initializers. */
4388 d->cur != d->end && (!sized_array_p || index <= max_index_cst);
4393 check_array_designated_initializer (d->cur);
4394 elt_init = reshape_init_r (elt_type, d, /*first_initializer_p=*/false);
4395 if (elt_init == error_mark_node)
4396 return error_mark_node;
4397 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init), NULL_TREE, elt_init);
4403 /* Subroutine of reshape_init_r, processes the initializers for arrays.
4404 Parameters are the same of reshape_init_r. */
4407 reshape_init_array (tree type, reshape_iter *d)
4409 tree max_index = NULL_TREE;
4411 gcc_assert (TREE_CODE (type) == ARRAY_TYPE);
4413 if (TYPE_DOMAIN (type))
4414 max_index = array_type_nelts (type);
4416 return reshape_init_array_1 (TREE_TYPE (type), max_index, d);
4419 /* Subroutine of reshape_init_r, processes the initializers for vectors.
4420 Parameters are the same of reshape_init_r. */
4423 reshape_init_vector (tree type, reshape_iter *d)
4425 tree max_index = NULL_TREE;
4428 gcc_assert (TREE_CODE (type) == VECTOR_TYPE);
4430 if (COMPOUND_LITERAL_P (d->cur->value))
4432 tree value = d->cur->value;
4433 if (!same_type_p (TREE_TYPE (value), type))
4435 error ("invalid type %qT as initializer for a vector of type %qT",
4436 TREE_TYPE (d->cur->value), type);
4437 value = error_mark_node;
4443 /* For a vector, the representation type is a struct
4444 containing a single member which is an array of the
4445 appropriate size. */
4446 rtype = TYPE_DEBUG_REPRESENTATION_TYPE (type);
4447 if (rtype && TYPE_DOMAIN (TREE_TYPE (TYPE_FIELDS (rtype))))
4448 max_index = array_type_nelts (TREE_TYPE (TYPE_FIELDS (rtype)));
4450 return reshape_init_array_1 (TREE_TYPE (type), max_index, d);
4453 /* Subroutine of reshape_init_r, processes the initializers for classes
4454 or union. Parameters are the same of reshape_init_r. */
4457 reshape_init_class (tree type, reshape_iter *d, bool first_initializer_p)
4462 gcc_assert (CLASS_TYPE_P (type));
4464 /* The initializer for a class is always a CONSTRUCTOR. */
4465 new_init = build_constructor (NULL_TREE, NULL);
4466 field = next_initializable_field (TYPE_FIELDS (type));
4472 An initializer for an aggregate member that is an
4473 empty class shall have the form of an empty
4474 initializer-list {}. */
4475 if (!first_initializer_p)
4477 error ("initializer for %qT must be brace-enclosed", type);
4478 return error_mark_node;
4483 /* Loop through the initializable fields, gathering initializers. */
4484 while (d->cur != d->end)
4488 /* Handle designated initializers, as an extension. */
4491 field = lookup_field_1 (type, d->cur->index, /*want_type=*/false);
4493 if (!field || TREE_CODE (field) != FIELD_DECL)
4495 error ("%qT has no non-static data member named %qD", type,
4497 return error_mark_node;
4501 /* If we processed all the member of the class, we are done. */
4505 field_init = reshape_init_r (TREE_TYPE (field), d,
4506 /*first_initializer_p=*/false);
4507 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init), field, field_init);
4511 When a union is initialized with a brace-enclosed
4512 initializer, the braces shall only contain an
4513 initializer for the first member of the union. */
4514 if (TREE_CODE (type) == UNION_TYPE)
4517 field = next_initializable_field (TREE_CHAIN (field));
4523 /* Subroutine of reshape_init, which processes a single initializer (part of
4524 a CONSTRUCTOR). TYPE is the type of the variable being initialized, D is the
4525 iterator within the CONSTRUCTOR which points to the initializer to process.
4526 FIRST_INITIALIZER_P is true if this is the first initializer of the
4527 CONSTRUCTOR node. */
4530 reshape_init_r (tree type, reshape_iter *d, bool first_initializer_p)
4532 tree init = d->cur->value;
4534 /* A non-aggregate type is always initialized with a single
4536 if (!CP_AGGREGATE_TYPE_P (type))
4538 /* It is invalid to initialize a non-aggregate type with a
4539 brace-enclosed initializer.
4540 We need to check for BRACE_ENCLOSED_INITIALIZER_P here because
4541 of g++.old-deja/g++.mike/p7626.C: a pointer-to-member constant is
4542 a CONSTRUCTOR (with a record type). */
4543 if (TREE_CODE (init) == CONSTRUCTOR
4544 && BRACE_ENCLOSED_INITIALIZER_P (init)) /* p7626.C */
4546 error ("braces around scalar initializer for type %qT", type);
4547 init = error_mark_node;
4556 All implicit type conversions (clause _conv_) are considered when
4557 initializing the aggregate member with an initializer from an
4558 initializer-list. If the initializer can initialize a member,
4559 the member is initialized. Otherwise, if the member is itself a
4560 non-empty subaggregate, brace elision is assumed and the
4561 initializer is considered for the initialization of the first
4562 member of the subaggregate. */
4563 if (TREE_CODE (init) != CONSTRUCTOR
4564 && can_convert_arg (type, TREE_TYPE (init), init, LOOKUP_NORMAL))
4570 /* [dcl.init.string]
4572 A char array (whether plain char, signed char, or unsigned char)
4573 can be initialized by a string-literal (optionally enclosed in
4574 braces); a wchar_t array can be initialized by a wide
4575 string-literal (optionally enclosed in braces). */
4576 if (TREE_CODE (type) == ARRAY_TYPE
4577 && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type))))
4579 tree str_init = init;
4581 /* Strip one level of braces if and only if they enclose a single
4582 element (as allowed by [dcl.init.string]). */
4583 if (!first_initializer_p
4584 && TREE_CODE (str_init) == CONSTRUCTOR
4585 && VEC_length (constructor_elt, CONSTRUCTOR_ELTS (str_init)) == 1)
4587 str_init = VEC_index (constructor_elt,
4588 CONSTRUCTOR_ELTS (str_init), 0)->value;
4591 /* If it's a string literal, then it's the initializer for the array
4592 as a whole. Otherwise, continue with normal initialization for
4593 array types (one value per array element). */
4594 if (TREE_CODE (str_init) == STRING_CST)
4601 /* The following cases are about aggregates. If we are not within a full
4602 initializer already, and there is not a CONSTRUCTOR, it means that there
4603 is a missing set of braces (that is, we are processing the case for
4604 which reshape_init exists). */
4605 if (!first_initializer_p)
4607 if (TREE_CODE (init) == CONSTRUCTOR)
4609 /* For a nested compound literal, there is no need to reshape since
4610 brace elision is not allowed. Even if we decided to allow it,
4611 we should add a call to reshape_init in finish_compound_literal,
4612 before calling digest_init, so changing this code would still
4613 not be necessary. */
4614 if (!COMPOUND_LITERAL_P (init))
4617 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init));
4618 return reshape_init (type, init);
4621 gcc_assert (!BRACE_ENCLOSED_INITIALIZER_P (init));
4624 warning (OPT_Wmissing_braces, "missing braces around initializer for %qT",
4628 /* Dispatch to specialized routines. */
4629 if (CLASS_TYPE_P (type))
4630 return reshape_init_class (type, d, first_initializer_p);
4631 else if (TREE_CODE (type) == ARRAY_TYPE)
4632 return reshape_init_array (type, d);
4633 else if (TREE_CODE (type) == VECTOR_TYPE)
4634 return reshape_init_vector (type, d);
4639 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
4640 brace-enclosed aggregate initializer.
4642 INIT is the CONSTRUCTOR containing the list of initializers describing
4643 a brace-enclosed initializer for an entity of the indicated aggregate TYPE.
4644 It may not presently match the shape of the TYPE; for example:
4646 struct S { int a; int b; };
4647 struct S a[] = { 1, 2, 3, 4 };
4649 Here INIT will hold a VEC of four elements, rather than a
4650 VEC of two elements, each itself a VEC of two elements. This
4651 routine transforms INIT from the former form into the latter. The
4652 revised CONSTRUCTOR node is returned. */
4655 reshape_init (tree type, tree init)
4657 VEC(constructor_elt, gc) *v;
4661 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init));
4663 v = CONSTRUCTOR_ELTS (init);
4665 /* An empty constructor does not need reshaping, and it is always a valid
4667 if (VEC_empty (constructor_elt, v))
4670 /* Recurse on this CONSTRUCTOR. */
4671 d.cur = VEC_index (constructor_elt, v, 0);
4672 d.end = d.cur + VEC_length (constructor_elt, v);
4674 new_init = reshape_init_r (type, &d, true);
4675 if (new_init == error_mark_node)
4676 return error_mark_node;
4678 /* Make sure all the element of the constructor were used. Otherwise,
4679 issue an error about exceeding initializers. */
4681 error ("too many initializers for %qT", type);
4686 /* Verify INIT (the initializer for DECL), and record the
4687 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
4688 grok_reference_init.
4690 If the return value is non-NULL, it is an expression that must be
4691 evaluated dynamically to initialize DECL. */
4694 check_initializer (tree decl, tree init, int flags, tree *cleanup)
4696 tree type = TREE_TYPE (decl);
4697 tree init_code = NULL;
4699 /* Things that are going to be initialized need to have complete
4701 TREE_TYPE (decl) = type = complete_type (TREE_TYPE (decl));
4703 if (type == error_mark_node)
4704 /* We will have already complained. */
4707 if (TREE_CODE (type) == ARRAY_TYPE)
4709 tree element_type = TREE_TYPE (type);
4711 /* The array type itself need not be complete, because the
4712 initializer may tell us how many elements are in the array.
4713 But, the elements of the array must be complete. */
4714 if (!COMPLETE_TYPE_P (complete_type (element_type)))
4716 error ("elements of array %q#D have incomplete type", decl);
4719 /* It is not valid to initialize an a VLA. */
4721 && ((COMPLETE_TYPE_P (type) && !TREE_CONSTANT (TYPE_SIZE (type)))
4722 || !TREE_CONSTANT (TYPE_SIZE (element_type))))
4724 error ("variable-sized object %qD may not be initialized", decl);
4728 else if (!COMPLETE_TYPE_P (type))
4730 error ("%qD has incomplete type", decl);
4731 TREE_TYPE (decl) = error_mark_node;
4735 /* There is no way to make a variable-sized class type in GNU C++. */
4736 gcc_assert (TREE_CONSTANT (TYPE_SIZE (type)));
4738 if (!CP_AGGREGATE_TYPE_P (type)
4739 && init && BRACE_ENCLOSED_INITIALIZER_P (init)
4740 && VEC_length (constructor_elt, CONSTRUCTOR_ELTS (init)) != 1)
4742 error ("scalar object %qD requires one element in initializer", decl);
4743 TREE_TYPE (decl) = error_mark_node;
4747 if (TREE_CODE (decl) == CONST_DECL)
4749 gcc_assert (TREE_CODE (type) != REFERENCE_TYPE);
4751 DECL_INITIAL (decl) = init;
4753 gcc_assert (init != NULL_TREE);
4756 else if (!DECL_EXTERNAL (decl) && TREE_CODE (type) == REFERENCE_TYPE)
4757 init = grok_reference_init (decl, type, init, cleanup);
4760 /* Do not reshape constructors of vectors (they don't need to be
4762 if (TREE_CODE (init) == CONSTRUCTOR
4763 && !COMPOUND_LITERAL_P (init)
4764 && !TREE_TYPE (init)) /* ptrmemfunc */
4766 init = reshape_init (type, init);
4768 if ((*targetm.vector_opaque_p) (type))
4770 error ("opaque vector types cannot be initialized");
4771 init = error_mark_node;
4775 /* If DECL has an array type without a specific bound, deduce the
4776 array size from the initializer. */
4777 maybe_deduce_size_from_array_init (decl, init);
4778 type = TREE_TYPE (decl);
4779 if (type == error_mark_node)
4782 if (TYPE_HAS_CONSTRUCTOR (type) || TYPE_NEEDS_CONSTRUCTING (type))
4784 if (TREE_CODE (type) == ARRAY_TYPE)
4785 goto initialize_aggr;
4786 else if (TREE_CODE (init) == CONSTRUCTOR)
4788 if (TYPE_NON_AGGREGATE_CLASS (type))
4790 error ("%qD must be initialized by constructor, "
4793 init = error_mark_node;
4796 goto dont_use_constructor;
4800 int saved_stmts_are_full_exprs_p;
4803 saved_stmts_are_full_exprs_p = 0;
4804 if (building_stmt_tree ())
4806 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
4807 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
4809 init = build_aggr_init (decl, init, flags);
4810 if (building_stmt_tree ())
4811 current_stmt_tree ()->stmts_are_full_exprs_p =
4812 saved_stmts_are_full_exprs_p;
4818 dont_use_constructor:
4819 if (TREE_CODE (init) != TREE_VEC)
4821 init_code = store_init_value (decl, init);
4822 if (pedantic && TREE_CODE (type) == ARRAY_TYPE
4823 && DECL_INITIAL (decl)
4824 && TREE_CODE (DECL_INITIAL (decl)) == STRING_CST
4825 && PAREN_STRING_LITERAL_P (DECL_INITIAL (decl)))
4826 warning (0, "array %qD initialized by parenthesized string literal %qE",
4827 decl, DECL_INITIAL (decl));
4832 else if (DECL_EXTERNAL (decl))
4834 else if (TYPE_P (type) && TYPE_NEEDS_CONSTRUCTING (type))
4835 goto initialize_aggr;
4836 else if (IS_AGGR_TYPE (type))
4838 tree core_type = strip_array_types (type);
4840 if (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type))
4841 error ("structure %qD with uninitialized const members", decl);
4842 if (CLASSTYPE_REF_FIELDS_NEED_INIT (core_type))
4843 error ("structure %qD with uninitialized reference members", decl);
4845 check_for_uninitialized_const_var (decl);
4848 check_for_uninitialized_const_var (decl);
4850 if (init && init != error_mark_node)
4851 init_code = build2 (INIT_EXPR, type, decl, init);
4856 /* If DECL is not a local variable, give it RTL. */
4859 make_rtl_for_nonlocal_decl (tree decl, tree init, const char* asmspec)
4861 int toplev = toplevel_bindings_p ();
4863 const char *filename;
4865 /* Set the DECL_ASSEMBLER_NAME for the object. */
4868 /* The `register' keyword, when used together with an
4869 asm-specification, indicates that the variable should be
4870 placed in a particular register. */
4871 if (TREE_CODE (decl) == VAR_DECL && DECL_REGISTER (decl))
4873 set_user_assembler_name (decl, asmspec);
4874 DECL_HARD_REGISTER (decl) = 1;
4878 if (TREE_CODE (decl) == FUNCTION_DECL
4879 && DECL_BUILT_IN_CLASS (decl) == BUILT_IN_NORMAL)
4880 set_builtin_user_assembler_name (decl, asmspec);
4881 set_user_assembler_name (decl, asmspec);
4885 /* Handle non-variables up front. */
4886 if (TREE_CODE (decl) != VAR_DECL)
4888 rest_of_decl_compilation (decl, toplev, at_eof);
4892 /* If we see a class member here, it should be a static data
4894 if (DECL_LANG_SPECIFIC (decl) && DECL_IN_AGGR_P (decl))
4896 gcc_assert (TREE_STATIC (decl));
4897 /* An in-class declaration of a static data member should be
4898 external; it is only a declaration, and not a definition. */
4899 if (init == NULL_TREE)
4900 gcc_assert (DECL_EXTERNAL (decl));
4903 /* We don't create any RTL for local variables. */
4904 if (DECL_FUNCTION_SCOPE_P (decl) && !TREE_STATIC (decl))
4907 /* We defer emission of local statics until the corresponding
4908 DECL_EXPR is expanded. */
4909 defer_p = DECL_FUNCTION_SCOPE_P (decl) || DECL_VIRTUAL_P (decl);
4911 /* We try to defer namespace-scope static constants so that they are
4912 not emitted into the object file unnecessarily. */
4913 filename = input_filename;
4914 if (!DECL_VIRTUAL_P (decl)
4915 && TREE_READONLY (decl)
4916 && DECL_INITIAL (decl) != NULL_TREE
4917 && DECL_INITIAL (decl) != error_mark_node
4919 && ! EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl))
4921 && !TREE_PUBLIC (decl))
4923 /* Fool with the linkage of static consts according to #pragma
4925 struct c_fileinfo *finfo = get_fileinfo (filename);
4926 if (!finfo->interface_unknown && !TREE_PUBLIC (decl))
4928 TREE_PUBLIC (decl) = 1;
4929 DECL_EXTERNAL (decl) = finfo->interface_only;
4934 /* Likewise for template instantiations. */
4935 else if (DECL_LANG_SPECIFIC (decl)
4936 && DECL_IMPLICIT_INSTANTIATION (decl))
4939 /* If we're not deferring, go ahead and assemble the variable. */
4941 rest_of_decl_compilation (decl, toplev, at_eof);
4944 /* Generate code to initialize DECL (a local variable). */
4947 initialize_local_var (tree decl, tree init)
4949 tree type = TREE_TYPE (decl);
4952 gcc_assert (TREE_CODE (decl) == VAR_DECL
4953 || TREE_CODE (decl) == RESULT_DECL);
4954 gcc_assert (!TREE_STATIC (decl));
4956 if (DECL_SIZE (decl) == NULL_TREE)
4958 /* If we used it already as memory, it must stay in memory. */
4959 DECL_INITIAL (decl) = NULL_TREE;
4960 TREE_ADDRESSABLE (decl) = TREE_USED (decl);
4963 if (DECL_SIZE (decl) && type != error_mark_node)
4967 /* Compute and store the initial value. */
4968 already_used = TREE_USED (decl) || TREE_USED (type);
4970 /* Perform the initialization. */
4973 int saved_stmts_are_full_exprs_p;
4975 gcc_assert (building_stmt_tree ());
4976 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
4977 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
4978 finish_expr_stmt (init);
4979 current_stmt_tree ()->stmts_are_full_exprs_p =
4980 saved_stmts_are_full_exprs_p;
4983 /* Set this to 0 so we can tell whether an aggregate which was
4984 initialized was ever used. Don't do this if it has a
4985 destructor, so we don't complain about the 'resource
4986 allocation is initialization' idiom. Now set
4987 attribute((unused)) on types so decls of that type will be
4988 marked used. (see TREE_USED, above.) */
4989 if (TYPE_NEEDS_CONSTRUCTING (type)
4991 && TYPE_HAS_TRIVIAL_DESTRUCTOR (type)
4992 && DECL_NAME (decl))
4993 TREE_USED (decl) = 0;
4994 else if (already_used)
4995 TREE_USED (decl) = 1;
4998 /* Generate a cleanup, if necessary. */
4999 cleanup = cxx_maybe_build_cleanup (decl);
5000 if (DECL_SIZE (decl) && cleanup)
5001 finish_decl_cleanup (decl, cleanup);
5004 /* DECL is a VAR_DECL for a compiler-generated variable with static
5005 storage duration (like a virtual table) whose initializer is a
5006 compile-time constant. INIT must be either a TREE_LIST of values,
5007 or a CONSTRUCTOR. Initialize the variable and provide it to the
5011 initialize_artificial_var (tree decl, tree init)
5013 gcc_assert (DECL_ARTIFICIAL (decl));
5014 if (TREE_CODE (init) == TREE_LIST)
5015 init = build_constructor_from_list (NULL_TREE, init);
5016 gcc_assert (TREE_CODE (init) == CONSTRUCTOR);
5017 DECL_INITIAL (decl) = init;
5018 DECL_INITIALIZED_P (decl) = 1;
5019 determine_visibility (decl);
5020 layout_var_decl (decl);
5021 maybe_commonize_var (decl);
5022 make_rtl_for_nonlocal_decl (decl, init, /*asmspec=*/NULL);
5025 /* Finish processing of a declaration;
5026 install its line number and initial value.
5027 If the length of an array type is not known before,
5028 it must be determined now, from the initial value, or it is an error.
5030 INIT is the initializer (if any) for DECL. If INIT_CONST_EXPR_P is
5031 true, then INIT is an integral constant expression.
5033 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
5034 if the (init) syntax was used. */
5037 cp_finish_decl (tree decl, tree init, bool init_const_expr_p,
5038 tree asmspec_tree, int flags)
5042 const char *asmspec = NULL;
5043 int was_readonly = 0;
5044 bool var_definition_p = false;
5045 int saved_processing_template_decl;
5047 if (decl == error_mark_node)
5052 error ("assignment (not initialization) in declaration");
5056 gcc_assert (TREE_CODE (decl) != RESULT_DECL);
5057 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
5058 gcc_assert (TREE_CODE (decl) != PARM_DECL);
5060 type = TREE_TYPE (decl);
5061 if (type == error_mark_node)
5064 /* Assume no cleanup is required. */
5065 cleanup = NULL_TREE;
5066 saved_processing_template_decl = processing_template_decl;
5068 /* If a name was specified, get the string. */
5069 if (global_scope_p (current_binding_level))
5070 asmspec_tree = maybe_apply_renaming_pragma (decl, asmspec_tree);
5071 if (asmspec_tree && asmspec_tree != error_mark_node)
5072 asmspec = TREE_STRING_POINTER (asmspec_tree);
5074 if (current_class_type
5075 && CP_DECL_CONTEXT (decl) == current_class_type
5076 && TYPE_BEING_DEFINED (current_class_type)
5077 && (DECL_INITIAL (decl) || init))
5078 DECL_INITIALIZED_IN_CLASS_P (decl) = 1;
5080 if (processing_template_decl)
5082 bool type_dependent_p;
5084 /* Add this declaration to the statement-tree. */
5085 if (at_function_scope_p ())
5086 add_decl_expr (decl);
5088 type_dependent_p = dependent_type_p (type);
5090 if (init && init_const_expr_p)
5092 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl) = 1;
5093 if (DECL_INTEGRAL_CONSTANT_VAR_P (decl))
5094 TREE_CONSTANT (decl) = 1;
5098 || !DECL_CLASS_SCOPE_P (decl)
5099 || !DECL_INTEGRAL_CONSTANT_VAR_P (decl)
5101 || value_dependent_expression_p (init)
5102 /* Check also if initializer is a value dependent
5103 { integral_constant_expression }. */
5104 || (TREE_CODE (init) == CONSTRUCTOR
5105 && VEC_length (constructor_elt, CONSTRUCTOR_ELTS (init)) == 1
5106 && value_dependent_expression_p
5107 (VEC_index (constructor_elt,
5108 CONSTRUCTOR_ELTS (init), 0)->value)))
5111 DECL_INITIAL (decl) = init;
5112 if (TREE_CODE (decl) == VAR_DECL
5113 && !DECL_PRETTY_FUNCTION_P (decl)
5114 && !type_dependent_p)
5115 maybe_deduce_size_from_array_init (decl, init);
5119 init = fold_non_dependent_expr (init);
5120 processing_template_decl = 0;
5123 /* Take care of TYPE_DECLs up front. */
5124 if (TREE_CODE (decl) == TYPE_DECL)
5126 if (type != error_mark_node
5127 && IS_AGGR_TYPE (type) && DECL_NAME (decl))
5129 if (TREE_TYPE (DECL_NAME (decl)) && TREE_TYPE (decl) != type)
5130 warning (0, "shadowing previous type declaration of %q#D", decl);
5131 set_identifier_type_value (DECL_NAME (decl), decl);
5134 /* If we have installed this as the canonical typedef for this
5135 type, and that type has not been defined yet, delay emitting
5136 the debug information for it, as we will emit it later. */
5137 if (TYPE_MAIN_DECL (TREE_TYPE (decl)) == decl
5138 && !COMPLETE_TYPE_P (TREE_TYPE (decl)))
5139 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
5141 rest_of_decl_compilation (decl, DECL_CONTEXT (decl) == NULL_TREE,
5146 /* A reference will be modified here, as it is initialized. */
5147 if (! DECL_EXTERNAL (decl)
5148 && TREE_READONLY (decl)
5149 && TREE_CODE (type) == REFERENCE_TYPE)
5152 TREE_READONLY (decl) = 0;
5155 if (TREE_CODE (decl) == VAR_DECL)
5157 /* Only PODs can have thread-local storage. Other types may require
5158 various kinds of non-trivial initialization. */
5159 if (DECL_THREAD_LOCAL_P (decl) && !pod_type_p (TREE_TYPE (decl)))
5160 error ("%qD cannot be thread-local because it has non-POD type %qT",
5161 decl, TREE_TYPE (decl));
5162 /* If this is a local variable that will need a mangled name,
5163 register it now. We must do this before processing the
5164 initializer for the variable, since the initialization might
5165 require a guard variable, and since the mangled name of the
5166 guard variable will depend on the mangled name of this
5168 if (!processing_template_decl
5169 && DECL_FUNCTION_SCOPE_P (decl)
5170 && TREE_STATIC (decl)
5171 && !DECL_ARTIFICIAL (decl))
5172 push_local_name (decl);
5173 /* Convert the initializer to the type of DECL, if we have not
5174 already initialized DECL. */
5175 if (!DECL_INITIALIZED_P (decl)
5176 /* If !DECL_EXTERNAL then DECL is being defined. In the
5177 case of a static data member initialized inside the
5178 class-specifier, there can be an initializer even if DECL
5179 is *not* defined. */
5180 && (!DECL_EXTERNAL (decl) || init))
5184 DECL_NONTRIVIALLY_INITIALIZED_P (decl) = 1;
5185 if (init_const_expr_p)
5187 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl) = 1;
5188 if (DECL_INTEGRAL_CONSTANT_VAR_P (decl))
5189 TREE_CONSTANT (decl) = 1;
5192 init = check_initializer (decl, init, flags, &cleanup);
5193 /* Thread-local storage cannot be dynamically initialized. */
5194 if (DECL_THREAD_LOCAL_P (decl) && init)
5196 error ("%qD is thread-local and so cannot be dynamically "
5197 "initialized", decl);
5201 /* Check that the initializer for a static data member was a
5202 constant. Although we check in the parser that the
5203 initializer is an integral constant expression, we do not
5204 simplify division-by-zero at the point at which it
5205 occurs. Therefore, in:
5207 struct S { static const int i = 7 / 0; };
5209 we issue an error at this point. It would
5210 probably be better to forbid division by zero in
5211 integral constant expressions. */
5212 if (DECL_EXTERNAL (decl) && init)
5214 error ("%qD cannot be initialized by a non-constant expression"
5215 " when being declared", decl);
5216 DECL_INITIALIZED_IN_CLASS_P (decl) = 0;
5224 The memory occupied by any object of static storage
5225 duration is zero-initialized at program startup before
5226 any other initialization takes place.
5228 We cannot create an appropriate initializer until after
5229 the type of DECL is finalized. If DECL_INITIAL is set,
5230 then the DECL is statically initialized, and any
5231 necessary zero-initialization has already been performed. */
5232 if (TREE_STATIC (decl) && !DECL_INITIAL (decl))
5233 DECL_INITIAL (decl) = build_zero_init (TREE_TYPE (decl),
5234 /*nelts=*/NULL_TREE,
5235 /*static_storage_p=*/true);
5236 /* Remember that the initialization for this variable has
5238 DECL_INITIALIZED_P (decl) = 1;
5239 /* This declaration is the definition of this variable,
5240 unless we are initializing a static data member within
5241 the class specifier. */
5242 if (!DECL_EXTERNAL (decl))
5243 var_definition_p = true;
5245 /* If the variable has an array type, lay out the type, even if
5246 there is no initializer. It is valid to index through the
5247 array, and we must get TYPE_ALIGN set correctly on the array
5249 else if (TREE_CODE (type) == ARRAY_TYPE)
5253 /* Add this declaration to the statement-tree. This needs to happen
5254 after the call to check_initializer so that the DECL_EXPR for a
5255 reference temp is added before the DECL_EXPR for the reference itself. */
5256 if (at_function_scope_p ())
5257 add_decl_expr (decl);
5259 /* Let the middle end know about variables and functions -- but not
5260 static data members in uninstantiated class templates. */
5261 if (!saved_processing_template_decl
5262 && (TREE_CODE (decl) == VAR_DECL
5263 || TREE_CODE (decl) == FUNCTION_DECL))
5265 if (TREE_CODE (decl) == VAR_DECL)
5267 layout_var_decl (decl);
5268 maybe_commonize_var (decl);
5269 if (DECL_NAMESPACE_SCOPE_P (decl) && !TREE_PUBLIC (decl)
5270 && !DECL_THIS_STATIC (decl) && !DECL_ARTIFICIAL (decl))
5272 /* This is a const variable with implicit 'static'. Set
5273 DECL_THIS_STATIC so we can tell it from variables that are
5274 !TREE_PUBLIC because of the anonymous namespace. */
5275 DECL_THIS_STATIC (decl) = 1;
5279 make_rtl_for_nonlocal_decl (decl, init, asmspec);
5281 /* Check for abstractness of the type. Notice that there is no
5282 need to strip array types here since the check for those types
5283 is already done within create_array_type_for_decl. */
5284 if (TREE_CODE (type) == FUNCTION_TYPE
5285 || TREE_CODE (type) == METHOD_TYPE)
5286 abstract_virtuals_error (decl, TREE_TYPE (type));
5288 abstract_virtuals_error (decl, type);
5290 /* This needs to happen after the linkage is set. */
5291 determine_visibility (decl);
5293 if (TREE_CODE (decl) == FUNCTION_DECL
5294 || TREE_TYPE (decl) == error_mark_node)
5295 /* No initialization required. */
5297 else if (DECL_EXTERNAL (decl)
5298 && ! (DECL_LANG_SPECIFIC (decl)
5299 && DECL_NOT_REALLY_EXTERN (decl)))
5302 DECL_INITIAL (decl) = init;
5306 /* A variable definition. */
5307 if (DECL_FUNCTION_SCOPE_P (decl))
5309 /* Initialize the local variable. */
5310 if (processing_template_decl)
5311 DECL_INITIAL (decl) = init;
5312 else if (!TREE_STATIC (decl))
5313 initialize_local_var (decl, init);
5316 /* If a variable is defined, and then a subsequent
5317 definition with external linkage is encountered, we will
5318 get here twice for the same variable. We want to avoid
5319 calling expand_static_init more than once. For variables
5320 that are not static data members, we can call
5321 expand_static_init only when we actually process the
5322 initializer. It is not legal to redeclare a static data
5323 member, so this issue does not arise in that case. */
5324 if (var_definition_p && TREE_STATIC (decl))
5325 expand_static_init (decl, init);
5329 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
5330 reference, insert it in the statement-tree now. */
5332 push_cleanup (decl, cleanup, false);
5335 processing_template_decl = saved_processing_template_decl;
5338 TREE_READONLY (decl) = 1;
5340 /* If this was marked 'used', be sure it will be output. */
5341 if (lookup_attribute ("used", DECL_ATTRIBUTES (decl)))
5342 mark_decl_referenced (decl);
5345 /* This is here for a midend callback from c-common.c. */
5348 finish_decl (tree decl, tree init, tree asmspec_tree)
5350 cp_finish_decl (decl, init, /*init_const_expr_p=*/false, asmspec_tree, 0);
5353 /* Returns a declaration for a VAR_DECL as if:
5355 extern "C" TYPE NAME;
5357 had been seen. Used to create compiler-generated global
5361 declare_global_var (tree name, tree type)
5365 push_to_top_level ();
5366 decl = build_decl (VAR_DECL, name, type);
5367 TREE_PUBLIC (decl) = 1;
5368 DECL_EXTERNAL (decl) = 1;
5369 DECL_ARTIFICIAL (decl) = 1;
5370 /* If the user has explicitly declared this variable (perhaps
5371 because the code we are compiling is part of a low-level runtime
5372 library), then it is possible that our declaration will be merged
5373 with theirs by pushdecl. */
5374 decl = pushdecl (decl);
5375 finish_decl (decl, NULL_TREE, NULL_TREE);
5376 pop_from_top_level ();
5381 /* Returns a pointer to the `atexit' function. Note that if
5382 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
5383 `__cxa_atexit' function specified in the IA64 C++ ABI. */
5386 get_atexit_node (void)
5393 bool use_aeabi_atexit;
5398 if (flag_use_cxa_atexit && !targetm.cxx.use_atexit_for_cxa_atexit ())
5400 /* The declaration for `__cxa_atexit' is:
5402 int __cxa_atexit (void (*)(void *), void *, void *)
5404 We build up the argument types and then then function type
5407 use_aeabi_atexit = targetm.cxx.use_aeabi_atexit ();
5408 /* First, build the pointer-to-function type for the first
5410 arg_types = tree_cons (NULL_TREE, ptr_type_node, void_list_node);
5411 fn_type = build_function_type (void_type_node, arg_types);
5412 fn_ptr_type = build_pointer_type (fn_type);
5413 /* Then, build the rest of the argument types. */
5414 arg_types = tree_cons (NULL_TREE, ptr_type_node, void_list_node);
5415 if (use_aeabi_atexit)
5417 arg_types = tree_cons (NULL_TREE, fn_ptr_type, arg_types);
5418 arg_types = tree_cons (NULL_TREE, ptr_type_node, arg_types);
5422 arg_types = tree_cons (NULL_TREE, ptr_type_node, arg_types);
5423 arg_types = tree_cons (NULL_TREE, fn_ptr_type, arg_types);
5425 /* And the final __cxa_atexit type. */
5426 fn_type = build_function_type (integer_type_node, arg_types);
5427 fn_ptr_type = build_pointer_type (fn_type);
5428 if (use_aeabi_atexit)
5429 name = "__aeabi_atexit";
5431 name = "__cxa_atexit";
5435 /* The declaration for `atexit' is:
5437 int atexit (void (*)());
5439 We build up the argument types and then then function type
5441 fn_type = build_function_type (void_type_node, void_list_node);
5442 fn_ptr_type = build_pointer_type (fn_type);
5443 arg_types = tree_cons (NULL_TREE, fn_ptr_type, void_list_node);
5444 /* Build the final atexit type. */
5445 fn_type = build_function_type (integer_type_node, arg_types);
5449 /* Now, build the function declaration. */
5450 push_lang_context (lang_name_c);
5451 atexit_fndecl = build_library_fn_ptr (name, fn_type);
5452 mark_used (atexit_fndecl);
5453 pop_lang_context ();
5454 atexit_node = decay_conversion (atexit_fndecl);
5459 /* Returns the __dso_handle VAR_DECL. */
5462 get_dso_handle_node (void)
5464 if (dso_handle_node)
5465 return dso_handle_node;
5467 /* Declare the variable. */
5468 dso_handle_node = declare_global_var (get_identifier ("__dso_handle"),
5471 return dso_handle_node;
5474 /* Begin a new function with internal linkage whose job will be simply
5475 to destroy some particular variable. */
5477 static GTY(()) int start_cleanup_cnt;
5480 start_cleanup_fn (void)
5486 bool use_cxa_atexit = flag_use_cxa_atexit
5487 && !targetm.cxx.use_atexit_for_cxa_atexit ();
5489 push_to_top_level ();
5491 /* No need to mangle this. */
5492 push_lang_context (lang_name_c);
5494 /* Build the parameter-types. */
5495 parmtypes = void_list_node;
5496 /* Functions passed to __cxa_atexit take an additional parameter.
5497 We'll just ignore it. After we implement the new calling
5498 convention for destructors, we can eliminate the use of
5499 additional cleanup functions entirely in the -fnew-abi case. */
5501 parmtypes = tree_cons (NULL_TREE, ptr_type_node, parmtypes);
5502 /* Build the function type itself. */
5503 fntype = build_function_type (void_type_node, parmtypes);
5504 /* Build the name of the function. */
5505 sprintf (name, "__tcf_%d", start_cleanup_cnt++);
5506 /* Build the function declaration. */
5507 fndecl = build_lang_decl (FUNCTION_DECL, get_identifier (name), fntype);
5508 /* It's a function with internal linkage, generated by the
5510 TREE_PUBLIC (fndecl) = 0;
5511 DECL_ARTIFICIAL (fndecl) = 1;
5512 /* Make the function `inline' so that it is only emitted if it is
5513 actually needed. It is unlikely that it will be inlined, since
5514 it is only called via a function pointer, but we avoid unnecessary
5515 emissions this way. */
5516 DECL_INLINE (fndecl) = 1;
5517 DECL_DECLARED_INLINE_P (fndecl) = 1;
5518 DECL_INTERFACE_KNOWN (fndecl) = 1;
5519 /* Build the parameter. */
5524 parmdecl = cp_build_parm_decl (NULL_TREE, ptr_type_node);
5525 DECL_CONTEXT (parmdecl) = fndecl;
5526 TREE_USED (parmdecl) = 1;
5527 DECL_ARGUMENTS (fndecl) = parmdecl;
5531 start_preparsed_function (fndecl, NULL_TREE, SF_PRE_PARSED);
5533 pop_lang_context ();
5535 return current_function_decl;
5538 /* Finish the cleanup function begun by start_cleanup_fn. */
5541 end_cleanup_fn (void)
5543 expand_or_defer_fn (finish_function (0));
5545 pop_from_top_level ();
5548 /* Generate code to handle the destruction of DECL, an object with
5549 static storage duration. */
5552 register_dtor_fn (tree decl)
5559 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
5560 return void_zero_node;
5562 /* Call build_cleanup before we enter the anonymous function so that
5563 any access checks will be done relative to the current scope,
5564 rather than the scope of the anonymous function. */
5565 build_cleanup (decl);
5567 /* Now start the function. */
5568 cleanup = start_cleanup_fn ();
5570 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
5571 to the original function, rather than the anonymous one. That
5572 will make the back-end think that nested functions are in use,
5573 which causes confusion. */
5575 push_deferring_access_checks (dk_no_check);
5576 fcall = build_cleanup (decl);
5577 pop_deferring_access_checks ();
5579 /* Create the body of the anonymous function. */
5580 compound_stmt = begin_compound_stmt (BCS_FN_BODY);
5581 finish_expr_stmt (fcall);
5582 finish_compound_stmt (compound_stmt);
5585 /* Call atexit with the cleanup function. */
5586 cxx_mark_addressable (cleanup);
5587 mark_used (cleanup);
5588 cleanup = build_unary_op (ADDR_EXPR, cleanup, 0);
5589 if (flag_use_cxa_atexit && !targetm.cxx.use_atexit_for_cxa_atexit ())
5591 args = tree_cons (NULL_TREE,
5592 build_unary_op (ADDR_EXPR, get_dso_handle_node (), 0),
5594 if (targetm.cxx.use_aeabi_atexit ())
5596 args = tree_cons (NULL_TREE, cleanup, args);
5597 args = tree_cons (NULL_TREE, null_pointer_node, args);
5601 args = tree_cons (NULL_TREE, null_pointer_node, args);
5602 args = tree_cons (NULL_TREE, cleanup, args);
5606 args = tree_cons (NULL_TREE, cleanup, NULL_TREE);
5607 return build_function_call (get_atexit_node (), args);
5610 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
5611 is its initializer. Generate code to handle the construction
5612 and destruction of DECL. */
5615 expand_static_init (tree decl, tree init)
5617 gcc_assert (TREE_CODE (decl) == VAR_DECL);
5618 gcc_assert (TREE_STATIC (decl));
5620 /* Some variables require no initialization. */
5622 && !TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl))
5623 && TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
5626 if (DECL_FUNCTION_SCOPE_P (decl))
5628 /* Emit code to perform this initialization but once. */
5629 tree if_stmt = NULL_TREE, inner_if_stmt = NULL_TREE;
5630 tree then_clause = NULL_TREE, inner_then_clause = NULL_TREE;
5631 tree guard, guard_addr, guard_addr_list;
5632 tree acquire_fn, release_fn, abort_fn;
5635 /* Emit code to perform this initialization but once. This code
5638 static <type> guard;
5639 if (!guard.first_byte) {
5640 if (__cxa_guard_acquire (&guard)) {
5643 // Do initialization.
5644 flag = true; __cxa_guard_release (&guard);
5645 // Register variable for destruction at end of program.
5647 if (!flag) __cxa_guard_abort (&guard);
5651 Note that the `flag' variable is only set to 1 *after* the
5652 initialization is complete. This ensures that an exception,
5653 thrown during the construction, will cause the variable to
5654 reinitialized when we pass through this code again, as per:
5658 If the initialization exits by throwing an exception, the
5659 initialization is not complete, so it will be tried again
5660 the next time control enters the declaration.
5662 This process should be thread-safe, too; multiple threads
5663 should not be able to initialize the variable more than
5666 /* Create the guard variable. */
5667 guard = get_guard (decl);
5669 /* This optimization isn't safe on targets with relaxed memory
5670 consistency. On such targets we force synchronization in
5671 __cxa_guard_acquire. */
5672 if (!targetm.relaxed_ordering || !flag_threadsafe_statics)
5674 /* Begin the conditional initialization. */
5675 if_stmt = begin_if_stmt ();
5676 finish_if_stmt_cond (get_guard_cond (guard), if_stmt);
5677 then_clause = begin_compound_stmt (BCS_NO_SCOPE);
5680 if (flag_threadsafe_statics)
5682 guard_addr = build_address (guard);
5683 guard_addr_list = build_tree_list (NULL_TREE, guard_addr);
5685 acquire_fn = get_identifier ("__cxa_guard_acquire");
5686 release_fn = get_identifier ("__cxa_guard_release");
5687 abort_fn = get_identifier ("__cxa_guard_abort");
5688 if (!get_global_value_if_present (acquire_fn, &acquire_fn))
5690 tree argtypes = tree_cons (NULL_TREE, TREE_TYPE (guard_addr),
5692 tree vfntype = build_function_type (void_type_node, argtypes);
5693 acquire_fn = push_library_fn
5694 (acquire_fn, build_function_type (integer_type_node, argtypes));
5695 release_fn = push_library_fn (release_fn, vfntype);
5696 abort_fn = push_library_fn (abort_fn, vfntype);
5700 release_fn = identifier_global_value (release_fn);
5701 abort_fn = identifier_global_value (abort_fn);
5704 inner_if_stmt = begin_if_stmt ();
5705 finish_if_stmt_cond (build_call (acquire_fn, guard_addr_list),
5708 inner_then_clause = begin_compound_stmt (BCS_NO_SCOPE);
5709 begin = get_target_expr (boolean_false_node);
5710 flag = TARGET_EXPR_SLOT (begin);
5712 TARGET_EXPR_CLEANUP (begin)
5713 = build3 (COND_EXPR, void_type_node, flag,
5715 build_call (abort_fn, guard_addr_list));
5716 CLEANUP_EH_ONLY (begin) = 1;
5718 /* Do the initialization itself. */
5719 init = add_stmt_to_compound (begin, init);
5720 init = add_stmt_to_compound
5721 (init, build2 (MODIFY_EXPR, void_type_node, flag, boolean_true_node));
5722 init = add_stmt_to_compound
5723 (init, build_call (release_fn, guard_addr_list));
5726 init = add_stmt_to_compound (init, set_guard (guard));
5728 /* Use atexit to register a function for destroying this static
5730 init = add_stmt_to_compound (init, register_dtor_fn (decl));
5732 finish_expr_stmt (init);
5734 if (flag_threadsafe_statics)
5736 finish_compound_stmt (inner_then_clause);
5737 finish_then_clause (inner_if_stmt);
5738 finish_if_stmt (inner_if_stmt);
5741 if (!targetm.relaxed_ordering || !flag_threadsafe_statics)
5743 finish_compound_stmt (then_clause);
5744 finish_then_clause (if_stmt);
5745 finish_if_stmt (if_stmt);
5749 static_aggregates = tree_cons (init, decl, static_aggregates);
5753 /* Make TYPE a complete type based on INITIAL_VALUE.
5754 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
5755 2 if there was no information (in which case assume 0 if DO_DEFAULT),
5756 3 if the initializer list is empty (in pedantic mode). */
5759 cp_complete_array_type (tree *ptype, tree initial_value, bool do_default)
5762 tree type, elt_type;
5766 /* An array of character type can be initialized from a
5767 brace-enclosed string constant.
5769 FIXME: this code is duplicated from reshape_init. Probably
5770 we should just call reshape_init here? */
5771 if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (*ptype)))
5772 && TREE_CODE (initial_value) == CONSTRUCTOR
5773 && !VEC_empty (constructor_elt, CONSTRUCTOR_ELTS (initial_value)))
5775 VEC(constructor_elt,gc) *v = CONSTRUCTOR_ELTS (initial_value);
5776 tree value = VEC_index (constructor_elt, v, 0)->value;
5778 if (TREE_CODE (value) == STRING_CST
5779 && VEC_length (constructor_elt, v) == 1)
5780 initial_value = value;
5784 failure = complete_array_type (ptype, initial_value, do_default);
5786 /* We can create the array before the element type is complete, which
5787 means that we didn't have these two bits set in the original type
5788 either. In completing the type, we are expected to propagate these
5789 bits. See also complete_type which does the same thing for arrays
5792 if (TYPE_DOMAIN (type))
5794 elt_type = TREE_TYPE (type);
5795 TYPE_NEEDS_CONSTRUCTING (type) = TYPE_NEEDS_CONSTRUCTING (elt_type);
5796 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type)
5797 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (elt_type);
5803 /* Return zero if something is declared to be a member of type
5804 CTYPE when in the context of CUR_TYPE. STRING is the error
5805 message to print in that case. Otherwise, quietly return 1. */
5808 member_function_or_else (tree ctype, tree cur_type, enum overload_flags flags)
5810 if (ctype && ctype != cur_type)
5812 if (flags == DTOR_FLAG)
5813 error ("destructor for alien class %qT cannot be a member", ctype);
5815 error ("constructor for alien class %qT cannot be a member", ctype);
5821 /* Subroutine of `grokdeclarator'. */
5823 /* Generate errors possibly applicable for a given set of specifiers.
5824 This is for ARM $7.1.2. */
5827 bad_specifiers (tree object,
5836 error ("%qD declared as a %<virtual%> %s", object, type);
5838 error ("%qD declared as an %<inline%> %s", object, type);
5840 error ("%<const%> and %<volatile%> function specifiers on "
5841 "%qD invalid in %s declaration",
5844 error ("%q+D declared as a friend", object);
5846 && (TREE_CODE (object) == TYPE_DECL
5847 || (!TYPE_PTRFN_P (TREE_TYPE (object))
5848 && !TYPE_REFFN_P (TREE_TYPE (object))
5849 && !TYPE_PTRMEMFUNC_P (TREE_TYPE (object)))))
5850 error ("%q+D declared with an exception specification", object);
5853 /* DECL is a member function or static data member and is presently
5854 being defined. Check that the definition is taking place in a
5858 check_class_member_definition_namespace (tree decl)
5860 /* These checks only apply to member functions and static data
5862 gcc_assert (TREE_CODE (decl) == FUNCTION_DECL
5863 || TREE_CODE (decl) == VAR_DECL);
5864 /* We check for problems with specializations in pt.c in
5865 check_specialization_namespace, where we can issue better
5867 if (processing_specialization)
5869 /* There are no restrictions on the placement of
5870 explicit instantiations. */
5871 if (processing_explicit_instantiation)
5875 A member function definition that appears outside of the
5876 class definition shall appear in a namespace scope enclosing
5877 the class definition.
5881 The definition for a static data member shall appear in a
5882 namespace scope enclosing the member's class definition. */
5883 if (!is_ancestor (current_namespace, DECL_CONTEXT (decl)))
5884 pedwarn ("definition of %qD is not in namespace enclosing %qT",
5885 decl, DECL_CONTEXT (decl));
5888 /* Build a PARM_DECL for the "this" parameter. TYPE is the
5889 METHOD_TYPE for a non-static member function; QUALS are the
5890 cv-qualifiers that apply to the function. */
5893 build_this_parm (tree type, cp_cv_quals quals)
5898 cp_cv_quals this_quals;
5900 this_type = TREE_VALUE (TYPE_ARG_TYPES (type));
5901 /* The `this' parameter is implicitly `const'; it cannot be
5903 this_quals = (quals & TYPE_QUAL_RESTRICT) | TYPE_QUAL_CONST;
5904 qual_type = cp_build_qualified_type (this_type, this_quals);
5905 parm = build_artificial_parm (this_identifier, qual_type);
5906 cp_apply_type_quals_to_decl (this_quals, parm);
5910 /* CTYPE is class type, or null if non-class.
5911 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
5913 DECLARATOR is the function's name.
5914 PARMS is a chain of PARM_DECLs for the function.
5915 VIRTUALP is truthvalue of whether the function is virtual or not.
5916 FLAGS are to be passed through to `grokclassfn'.
5917 QUALS are qualifiers indicating whether the function is `const'
5919 RAISES is a list of exceptions that this function can raise.
5920 CHECK is 1 if we must find this method in CTYPE, 0 if we should
5921 not look, and -1 if we should not call `grokclassfn' at all.
5923 SFK is the kind of special function (if any) for the new function.
5925 Returns `NULL_TREE' if something goes wrong, after issuing
5926 applicable error messages. */
5929 grokfndecl (tree ctype,
5933 tree orig_declarator,
5935 enum overload_flags flags,
5942 special_function_kind sfk,
5949 int staticp = ctype && TREE_CODE (type) == FUNCTION_TYPE;
5953 type = build_exception_variant (type, raises);
5955 decl = build_lang_decl (FUNCTION_DECL, declarator, type);
5956 if (TREE_CODE (type) == METHOD_TYPE)
5959 parm = build_this_parm (type, quals);
5960 TREE_CHAIN (parm) = parms;
5963 DECL_ARGUMENTS (decl) = parms;
5964 /* Propagate volatile out from type to decl. */
5965 if (TYPE_VOLATILE (type))
5966 TREE_THIS_VOLATILE (decl) = 1;
5969 && TREE_CODE (orig_declarator) == TEMPLATE_ID_EXPR)
5973 ("defining explicit specialization %qD in friend declaration",
5977 tree fns = TREE_OPERAND (orig_declarator, 0);
5978 tree args = TREE_OPERAND (orig_declarator, 1);
5980 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
5982 /* Something like `template <class T> friend void f<T>()'. */
5983 error ("invalid use of template-id %qD in declaration "
5984 "of primary template",
5990 /* A friend declaration of the form friend void f<>(). Record
5991 the information in the TEMPLATE_ID_EXPR. */
5992 SET_DECL_IMPLICIT_INSTANTIATION (decl);
5994 if (TREE_CODE (fns) == COMPONENT_REF)
5996 /* Due to bison parser ickiness, we will have already looked
5997 up an operator_name or PFUNCNAME within the current class
5998 (see template_id in parse.y). If the current class contains
5999 such a name, we'll get a COMPONENT_REF here. Undo that. */
6001 gcc_assert (TREE_TYPE (TREE_OPERAND (fns, 0))
6002 == current_class_type);
6003 fns = TREE_OPERAND (fns, 1);
6005 gcc_assert (TREE_CODE (fns) == IDENTIFIER_NODE
6006 || TREE_CODE (fns) == OVERLOAD);
6007 DECL_TEMPLATE_INFO (decl) = tree_cons (fns, args, NULL_TREE);
6009 for (t = TYPE_ARG_TYPES (TREE_TYPE (decl)); t; t = TREE_CHAIN (t))
6010 if (TREE_PURPOSE (t)
6011 && TREE_CODE (TREE_PURPOSE (t)) == DEFAULT_ARG)
6013 error ("default arguments are not allowed in declaration "
6014 "of friend template specialization %qD",
6021 error ("%<inline%> is not allowed in declaration of friend "
6022 "template specialization %qD",
6029 /* If this decl has namespace scope, set that up. */
6031 set_decl_namespace (decl, in_namespace, friendp);
6033 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
6035 /* `main' and builtins have implicit 'C' linkage. */
6036 if ((MAIN_NAME_P (declarator)
6037 || (IDENTIFIER_LENGTH (declarator) > 10
6038 && IDENTIFIER_POINTER (declarator)[0] == '_'
6039 && IDENTIFIER_POINTER (declarator)[1] == '_'
6040 && strncmp (IDENTIFIER_POINTER (declarator)+2, "builtin_", 8) == 0))
6041 && current_lang_name == lang_name_cplusplus
6042 && ctype == NULL_TREE
6043 /* NULL_TREE means global namespace. */
6044 && DECL_CONTEXT (decl) == NULL_TREE)
6045 SET_DECL_LANGUAGE (decl, lang_c);
6047 /* Should probably propagate const out from type to decl I bet (mrs). */
6050 DECL_STATIC_FUNCTION_P (decl) = 1;
6051 DECL_CONTEXT (decl) = ctype;
6056 DECL_CONTEXT (decl) = ctype;
6058 check_class_member_definition_namespace (decl);
6061 if (ctype == NULL_TREE && DECL_MAIN_P (decl))
6063 if (processing_template_decl)
6064 error ("cannot declare %<::main%> to be a template");
6066 error ("cannot declare %<::main%> to be inline");
6068 error ("cannot declare %<::main%> to be static");
6073 /* Members of anonymous types and local classes have no linkage; make
6074 them internal. If a typedef is made later, this will be changed. */
6075 if (ctype && (TYPE_ANONYMOUS_P (ctype)
6076 || decl_function_context (TYPE_MAIN_DECL (ctype))))
6081 /* [basic.link]: A name with no linkage (notably, the name of a class
6082 or enumeration declared in a local scope) shall not be used to
6083 declare an entity with linkage.
6085 Only check this for public decls for now. See core 319, 389. */
6086 t = no_linkage_check (TREE_TYPE (decl),
6087 /*relaxed_p=*/false);
6090 if (TYPE_ANONYMOUS_P (t))
6092 if (DECL_EXTERN_C_P (decl))
6093 /* Allow this; it's pretty common in C. */;
6096 pedwarn ("non-local function %q#D uses anonymous type",
6098 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
6099 pedwarn ("%q+#D does not refer to the unqualified "
6100 "type, so it is not used for linkage",
6105 pedwarn ("non-local function %q#D uses local type %qT", decl, t);
6109 TREE_PUBLIC (decl) = publicp;
6112 DECL_INTERFACE_KNOWN (decl) = 1;
6113 DECL_NOT_REALLY_EXTERN (decl) = 1;
6116 /* If the declaration was declared inline, mark it as such. */
6118 DECL_DECLARED_INLINE_P (decl) = 1;
6119 /* We inline functions that are explicitly declared inline, or, when
6120 the user explicitly asks us to, all functions. */
6121 if (DECL_DECLARED_INLINE_P (decl)
6122 || (flag_inline_trees == 2 && !DECL_INLINE (decl) && funcdef_flag))
6123 DECL_INLINE (decl) = 1;
6125 DECL_EXTERNAL (decl) = 1;
6126 if (quals && TREE_CODE (type) == FUNCTION_TYPE)
6129 ? G_("static member function %qD cannot have cv-qualifier")
6130 : G_("non-member function %qD cannot have cv-qualifier"),
6132 quals = TYPE_UNQUALIFIED;
6135 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl))
6136 && !grok_op_properties (decl, /*complain=*/true))
6139 if (ctype && decl_function_context (decl))
6140 DECL_NO_STATIC_CHAIN (decl) = 1;
6143 /* Make the init_value nonzero so pushdecl knows this is not
6144 tentative. error_mark_node is replaced later with the BLOCK. */
6145 DECL_INITIAL (decl) = error_mark_node;
6147 if (TYPE_NOTHROW_P (type) || nothrow_libfn_p (decl))
6148 TREE_NOTHROW (decl) = 1;
6150 /* Caller will do the rest of this. */
6154 if (ctype != NULL_TREE)
6156 if (sfk == sfk_constructor)
6157 DECL_CONSTRUCTOR_P (decl) = 1;
6159 grokclassfn (ctype, decl, flags);
6162 decl = check_explicit_specialization (orig_declarator, decl,
6165 4 * (friendp != 0));
6166 if (decl == error_mark_node)
6171 cplus_decl_attributes (&decl, *attrlist, 0);
6172 *attrlist = NULL_TREE;
6175 /* Check main's type after attributes have been applied. */
6176 if (ctype == NULL_TREE && DECL_MAIN_P (decl))
6178 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl)),
6181 tree oldtypeargs = TYPE_ARG_TYPES (TREE_TYPE (decl));
6183 error ("%<::main%> must return %<int%>");
6184 newtype = build_function_type (integer_type_node, oldtypeargs);
6185 TREE_TYPE (decl) = newtype;
6187 check_main_parameter_types (decl);
6190 if (ctype != NULL_TREE
6191 && (! TYPE_FOR_JAVA (ctype) || check_java_method (decl))
6196 old_decl = check_classfn (ctype, decl,
6197 (processing_template_decl
6198 > template_class_depth (ctype))
6199 ? current_template_parms
6206 if (TREE_CODE (old_decl) == TEMPLATE_DECL)
6207 /* Because grokfndecl is always supposed to return a
6208 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
6209 here. We depend on our callers to figure out that its
6210 really a template that's being returned. */
6211 old_decl = DECL_TEMPLATE_RESULT (old_decl);
6213 if (DECL_STATIC_FUNCTION_P (old_decl)
6214 && TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE)
6215 /* Remove the `this' parm added by grokclassfn.
6216 XXX Isn't this done in start_function, too? */
6217 revert_static_member_fn (decl);
6218 if (DECL_ARTIFICIAL (old_decl))
6219 error ("definition of implicitly-declared %qD", old_decl);
6221 /* Since we've smashed OLD_DECL to its
6222 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
6223 if (TREE_CODE (decl) == TEMPLATE_DECL)
6224 decl = DECL_TEMPLATE_RESULT (decl);
6226 /* Attempt to merge the declarations. This can fail, in
6227 the case of some invalid specialization declarations. */
6228 pushed_scope = push_scope (ctype);
6229 ok = duplicate_decls (decl, old_decl, friendp);
6231 pop_scope (pushed_scope);
6234 error ("no %q#D member function declared in class %qT",
6242 if (DECL_CONSTRUCTOR_P (decl) && !grok_ctor_properties (ctype, decl))
6245 if (ctype == NULL_TREE || check)
6249 DECL_VIRTUAL_P (decl) = 1;
6254 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
6255 the linkage that DECL will receive in the object file. */
6258 set_linkage_for_static_data_member (tree decl)
6260 /* A static data member always has static storage duration and
6261 external linkage. Note that static data members are forbidden in
6262 local classes -- the only situation in which a class has
6263 non-external linkage. */
6264 TREE_PUBLIC (decl) = 1;
6265 TREE_STATIC (decl) = 1;
6266 /* For non-template classes, static data members are always put
6267 out in exactly those files where they are defined, just as
6268 with ordinary namespace-scope variables. */
6269 if (!processing_template_decl)
6270 DECL_INTERFACE_KNOWN (decl) = 1;
6273 /* Create a VAR_DECL named NAME with the indicated TYPE.
6275 If SCOPE is non-NULL, it is the class type or namespace containing
6276 the variable. If SCOPE is NULL, the variable should is created in
6277 the innermost enclosings scope. */
6280 grokvardecl (tree type,
6282 const cp_decl_specifier_seq *declspecs,
6288 tree explicit_scope;
6290 gcc_assert (!name || TREE_CODE (name) == IDENTIFIER_NODE);
6292 /* Compute the scope in which to place the variable, but remember
6293 whether or not that scope was explicitly specified by the user. */
6294 explicit_scope = scope;
6297 /* An explicit "extern" specifier indicates a namespace-scope
6299 if (declspecs->storage_class == sc_extern)
6300 scope = current_namespace;
6301 else if (!at_function_scope_p ())
6302 scope = current_scope ();
6306 && (/* If the variable is a namespace-scope variable declared in a
6307 template, we need DECL_LANG_SPECIFIC. */
6308 (TREE_CODE (scope) == NAMESPACE_DECL && processing_template_decl)
6309 /* Similarly for namespace-scope variables with language linkage
6311 || (TREE_CODE (scope) == NAMESPACE_DECL
6312 && current_lang_name != lang_name_cplusplus)
6313 /* Similarly for static data members. */
6315 decl = build_lang_decl (VAR_DECL, name, type);
6317 decl = build_decl (VAR_DECL, name, type);
6319 if (explicit_scope && TREE_CODE (explicit_scope) == NAMESPACE_DECL)
6320 set_decl_namespace (decl, explicit_scope, 0);
6322 DECL_CONTEXT (decl) = FROB_CONTEXT (scope);
6324 if (declspecs->storage_class == sc_extern)
6326 DECL_THIS_EXTERN (decl) = 1;
6327 DECL_EXTERNAL (decl) = !initialized;
6330 if (DECL_CLASS_SCOPE_P (decl))
6332 set_linkage_for_static_data_member (decl);
6333 /* This function is only called with out-of-class definitions. */
6334 DECL_EXTERNAL (decl) = 0;
6335 check_class_member_definition_namespace (decl);
6337 /* At top level, either `static' or no s.c. makes a definition
6338 (perhaps tentative), and absence of `static' makes it public. */
6339 else if (toplevel_bindings_p ())
6341 TREE_PUBLIC (decl) = (declspecs->storage_class != sc_static
6342 && (DECL_THIS_EXTERN (decl) || ! constp));
6343 TREE_STATIC (decl) = ! DECL_EXTERNAL (decl);
6345 /* Not at top level, only `static' makes a static definition. */
6348 TREE_STATIC (decl) = declspecs->storage_class == sc_static;
6349 TREE_PUBLIC (decl) = DECL_EXTERNAL (decl);
6352 if (declspecs->specs[(int)ds_thread])
6354 if (targetm.have_tls)
6355 DECL_TLS_MODEL (decl) = decl_default_tls_model (decl);
6357 /* A mere warning is sure to result in improper semantics
6358 at runtime. Don't bother to allow this to compile. */
6359 error ("thread-local storage not supported for this target");
6362 if (TREE_PUBLIC (decl))
6364 /* [basic.link]: A name with no linkage (notably, the name of a class
6365 or enumeration declared in a local scope) shall not be used to
6366 declare an entity with linkage.
6368 Only check this for public decls for now. */
6369 tree t = no_linkage_check (TREE_TYPE (decl), /*relaxed_p=*/false);
6372 if (TYPE_ANONYMOUS_P (t))
6374 if (DECL_EXTERN_C_P (decl))
6375 /* Allow this; it's pretty common in C. */
6379 /* DRs 132, 319 and 389 seem to indicate types with
6380 no linkage can only be used to declare extern "C"
6381 entities. Since it's not always an error in the
6382 ISO C++ 90 Standard, we only issue a warning. */
6383 warning (0, "non-local variable %q#D uses anonymous type",
6385 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
6386 warning (0, "%q+#D does not refer to the unqualified "
6387 "type, so it is not used for linkage",
6392 warning (0, "non-local variable %q#D uses local type %qT", decl, t);
6396 DECL_INTERFACE_KNOWN (decl) = 1;
6401 /* Create and return a canonical pointer to member function type, for
6402 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
6405 build_ptrmemfunc_type (tree type)
6409 tree unqualified_variant = NULL_TREE;
6411 if (type == error_mark_node)
6414 /* If a canonical type already exists for this type, use it. We use
6415 this method instead of type_hash_canon, because it only does a
6416 simple equality check on the list of field members. */
6418 if ((t = TYPE_GET_PTRMEMFUNC_TYPE (type)))
6421 /* Make sure that we always have the unqualified pointer-to-member
6423 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
6425 = build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type));
6427 t = make_aggr_type (RECORD_TYPE);
6428 xref_basetypes (t, NULL_TREE);
6430 /* Let the front-end know this is a pointer to member function... */
6431 TYPE_PTRMEMFUNC_FLAG (t) = 1;
6432 /* ... and not really an aggregate. */
6433 SET_IS_AGGR_TYPE (t, 0);
6435 field = build_decl (FIELD_DECL, pfn_identifier, type);
6438 field = build_decl (FIELD_DECL, delta_identifier, delta_type_node);
6439 TREE_CHAIN (field) = fields;
6442 finish_builtin_struct (t, "__ptrmemfunc_type", fields, ptr_type_node);
6444 /* Zap out the name so that the back-end will give us the debugging
6445 information for this anonymous RECORD_TYPE. */
6446 TYPE_NAME (t) = NULL_TREE;
6448 /* If this is not the unqualified form of this pointer-to-member
6449 type, set the TYPE_MAIN_VARIANT for this type to be the
6450 unqualified type. Since they are actually RECORD_TYPEs that are
6451 not variants of each other, we must do this manually. */
6452 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
6454 t = build_qualified_type (t, cp_type_quals (type));
6455 TYPE_MAIN_VARIANT (t) = unqualified_variant;
6456 TYPE_NEXT_VARIANT (t) = TYPE_NEXT_VARIANT (unqualified_variant);
6457 TYPE_NEXT_VARIANT (unqualified_variant) = t;
6460 /* Cache this pointer-to-member type so that we can find it again
6462 TYPE_SET_PTRMEMFUNC_TYPE (type, t);
6467 /* Create and return a pointer to data member type. */
6470 build_ptrmem_type (tree class_type, tree member_type)
6472 if (TREE_CODE (member_type) == METHOD_TYPE)
6476 arg_types = TYPE_ARG_TYPES (member_type);
6477 class_type = (cp_build_qualified_type
6479 cp_type_quals (TREE_TYPE (TREE_VALUE (arg_types)))));
6481 = build_method_type_directly (class_type,
6482 TREE_TYPE (member_type),
6483 TREE_CHAIN (arg_types));
6484 return build_ptrmemfunc_type (build_pointer_type (member_type));
6488 gcc_assert (TREE_CODE (member_type) != FUNCTION_TYPE);
6489 return build_offset_type (class_type, member_type);
6493 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
6494 Check to see that the definition is valid. Issue appropriate error
6495 messages. Return 1 if the definition is particularly bad, or 0
6499 check_static_variable_definition (tree decl, tree type)
6501 /* Motion 10 at San Diego: If a static const integral data member is
6502 initialized with an integral constant expression, the initializer
6503 may appear either in the declaration (within the class), or in
6504 the definition, but not both. If it appears in the class, the
6505 member is a member constant. The file-scope definition is always
6507 if (!ARITHMETIC_TYPE_P (type) && TREE_CODE (type) != ENUMERAL_TYPE)
6509 error ("invalid in-class initialization of static data member "
6510 "of non-integral type %qT",
6512 /* If we just return the declaration, crashes will sometimes
6513 occur. We therefore return void_type_node, as if this were a
6514 friend declaration, to cause callers to completely ignore
6515 this declaration. */
6518 else if (!CP_TYPE_CONST_P (type))
6519 error ("ISO C++ forbids in-class initialization of non-const "
6520 "static member %qD",
6522 else if (pedantic && !INTEGRAL_TYPE_P (type))
6523 pedwarn ("ISO C++ forbids initialization of member constant "
6524 "%qD of non-integral type %qT", decl, type);
6529 /* Given the SIZE (i.e., number of elements) in an array, compute an
6530 appropriate index type for the array. If non-NULL, NAME is the
6531 name of the thing being declared. */
6534 compute_array_index_type (tree name, tree size)
6539 if (error_operand_p (size))
6540 return error_mark_node;
6542 type = TREE_TYPE (size);
6543 /* The array bound must be an integer type. */
6544 if (!dependent_type_p (type) && !INTEGRAL_TYPE_P (type))
6547 error ("size of array %qD has non-integral type %qT", name, type);
6549 error ("size of array has non-integral type %qT", type);
6550 size = integer_one_node;
6551 type = TREE_TYPE (size);
6554 if (abi_version_at_least (2)
6555 /* We should only handle value dependent expressions specially. */
6556 ? value_dependent_expression_p (size)
6557 /* But for abi-1, we handled all instances in templates. This
6558 effects the manglings produced. */
6559 : processing_template_decl)
6560 return build_index_type (build_min (MINUS_EXPR, sizetype,
6561 size, integer_one_node));
6563 /* The size might be the result of a cast. */
6564 STRIP_TYPE_NOPS (size);
6566 /* It might be a const variable or enumeration constant. */
6567 size = integral_constant_value (size);
6569 /* Normally, the array-bound will be a constant. */
6570 if (TREE_CODE (size) == INTEGER_CST)
6572 /* Check to see if the array bound overflowed. Make that an
6573 error, no matter how generous we're being. */
6574 int old_flag_pedantic_errors = flag_pedantic_errors;
6575 int old_pedantic = pedantic;
6576 pedantic = flag_pedantic_errors = 1;
6577 constant_expression_warning (size);
6578 pedantic = old_pedantic;
6579 flag_pedantic_errors = old_flag_pedantic_errors;
6581 /* An array must have a positive number of elements. */
6582 if (INT_CST_LT (size, integer_zero_node))
6585 error ("size of array %qD is negative", name);
6587 error ("size of array is negative");
6588 size = integer_one_node;
6590 /* As an extension we allow zero-sized arrays. We always allow
6591 them in system headers because glibc uses them. */
6592 else if (integer_zerop (size) && pedantic && !in_system_header)
6595 pedwarn ("ISO C++ forbids zero-size array %qD", name);
6597 pedwarn ("ISO C++ forbids zero-size array");
6600 else if (TREE_CONSTANT (size))
6602 /* `(int) &fn' is not a valid array bound. */
6604 error ("size of array %qD is not an integral constant-expression",
6607 error ("size of array is not an integral constant-expression");
6608 size = integer_one_node;
6613 pedwarn ("ISO C++ forbids variable-size array %qD", name);
6615 pedwarn ("ISO C++ forbids variable-size array");
6618 if (processing_template_decl && !TREE_CONSTANT (size))
6619 /* A variable sized array. */
6620 itype = build_min (MINUS_EXPR, sizetype, size, integer_one_node);
6623 HOST_WIDE_INT saved_processing_template_decl;
6625 /* Compute the index of the largest element in the array. It is
6626 one less than the number of elements in the array. We save
6627 and restore PROCESSING_TEMPLATE_DECL so that computations in
6628 cp_build_binary_op will be appropriately folded. */
6629 saved_processing_template_decl = processing_template_decl;
6630 processing_template_decl = 0;
6631 itype = cp_build_binary_op (MINUS_EXPR,
6632 cp_convert (ssizetype, size),
6633 cp_convert (ssizetype, integer_one_node));
6634 itype = fold (itype);
6635 processing_template_decl = saved_processing_template_decl;
6637 if (!TREE_CONSTANT (itype))
6638 /* A variable sized array. */
6639 itype = variable_size (itype);
6640 /* Make sure that there was no overflow when creating to a signed
6641 index type. (For example, on a 32-bit machine, an array with
6642 size 2^32 - 1 is too big.) */
6643 else if (TREE_CODE (itype) == INTEGER_CST
6644 && TREE_OVERFLOW (itype))
6646 error ("overflow in array dimension");
6647 TREE_OVERFLOW (itype) = 0;
6651 /* Create and return the appropriate index type. */
6652 return build_index_type (itype);
6655 /* Returns the scope (if any) in which the entity declared by
6656 DECLARATOR will be located. If the entity was declared with an
6657 unqualified name, NULL_TREE is returned. */
6660 get_scope_of_declarator (const cp_declarator *declarator)
6662 while (declarator && declarator->kind != cdk_id)
6663 declarator = declarator->declarator;
6665 /* If the declarator-id is a SCOPE_REF, the scope in which the
6666 declaration occurs is the first operand. */
6668 && declarator->u.id.qualifying_scope)
6669 return declarator->u.id.qualifying_scope;
6671 /* Otherwise, the declarator is not a qualified name; the entity will
6672 be declared in the current scope. */
6676 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
6677 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
6681 create_array_type_for_decl (tree name, tree type, tree size)
6683 tree itype = NULL_TREE;
6684 const char* error_msg;
6686 /* If things have already gone awry, bail now. */
6687 if (type == error_mark_node || size == error_mark_node)
6688 return error_mark_node;
6690 /* Assume that everything will go OK. */
6693 /* There are some types which cannot be array elements. */
6694 switch (TREE_CODE (type))
6697 error_msg = "array of void";
6701 error_msg = "array of functions";
6704 case REFERENCE_TYPE:
6705 error_msg = "array of references";
6709 error_msg = "array of function members";
6716 /* If something went wrong, issue an error-message and return. */
6720 error ("declaration of %qD as %s", name, error_msg);
6722 error ("creating %s", error_msg);
6724 return error_mark_node;
6729 The constant expressions that specify the bounds of the arrays
6730 can be omitted only for the first member of the sequence. */
6731 if (TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type))
6734 error ("declaration of %qD as multidimensional array must "
6735 "have bounds for all dimensions except the first",
6738 error ("multidimensional array must have bounds for all "
6739 "dimensions except the first");
6741 return error_mark_node;
6744 /* Figure out the index type for the array. */
6746 itype = compute_array_index_type (name, size);
6749 T is called the array element type; this type shall not be [...] an
6750 abstract class type. */
6751 abstract_virtuals_error (name, type);
6753 return build_cplus_array_type (type, itype);
6756 /* Check that it's OK to declare a function with the indicated TYPE.
6757 SFK indicates the kind of special function (if any) that this
6758 function is. OPTYPE is the type given in a conversion operator
6759 declaration, or the class type for a constructor/destructor.
6760 Returns the actual return type of the function; that
6761 may be different than TYPE if an error occurs, or for certain
6762 special functions. */
6765 check_special_function_return_type (special_function_kind sfk,
6771 case sfk_constructor:
6773 error ("return type specification for constructor invalid");
6775 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
6776 type = build_pointer_type (optype);
6778 type = void_type_node;
6781 case sfk_destructor:
6783 error ("return type specification for destructor invalid");
6784 /* We can't use the proper return type here because we run into
6785 problems with ambiguous bases and covariant returns.
6786 Java classes are left unchanged because (void *) isn't a valid
6787 Java type, and we don't want to change the Java ABI. */
6788 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
6789 type = build_pointer_type (void_type_node);
6791 type = void_type_node;
6794 case sfk_conversion:
6795 if (type && !same_type_p (type, optype))
6796 error ("operator %qT declared to return %qT", optype, type);
6798 pedwarn ("return type specified for %<operator %T%>", optype);
6809 /* A variable or data member (whose unqualified name is IDENTIFIER)
6810 has been declared with the indicated TYPE. If the TYPE is not
6811 acceptable, issue an error message and return a type to use for
6812 error-recovery purposes. */
6815 check_var_type (tree identifier, tree type)
6817 if (VOID_TYPE_P (type))
6820 error ("unnamed variable or field declared void");
6821 else if (TREE_CODE (identifier) == IDENTIFIER_NODE)
6823 gcc_assert (!IDENTIFIER_OPNAME_P (identifier));
6824 error ("variable or field %qE declared void", identifier);
6827 error ("variable or field declared void");
6828 type = error_mark_node;
6834 /* Given declspecs and a declarator (abstract or otherwise), determine
6835 the name and type of the object declared and construct a DECL node
6838 DECLSPECS is a chain of tree_list nodes whose value fields
6839 are the storage classes and type specifiers.
6841 DECL_CONTEXT says which syntactic context this declaration is in:
6842 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
6843 FUNCDEF for a function definition. Like NORMAL but a few different
6844 error messages in each case. Return value may be zero meaning
6845 this definition is too screwy to try to parse.
6846 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
6847 handle member functions (which have FIELD context).
6848 Return value may be zero meaning this definition is too screwy to
6850 PARM for a parameter declaration (either within a function prototype
6851 or before a function body). Make a PARM_DECL, or return void_type_node.
6852 CATCHPARM for a parameter declaration before a catch clause.
6853 TYPENAME if for a typename (in a cast or sizeof).
6854 Don't make a DECL node; just return the ..._TYPE node.
6855 FIELD for a struct or union field; make a FIELD_DECL.
6856 BITFIELD for a field with specified width.
6857 INITIALIZED is 1 if the decl has an initializer.
6859 ATTRLIST is a pointer to the list of attributes, which may be NULL
6860 if there are none; *ATTRLIST may be modified if attributes from inside
6861 the declarator should be applied to the declaration.
6863 When this function is called, scoping variables (such as
6864 CURRENT_CLASS_TYPE) should reflect the scope in which the
6865 declaration occurs, not the scope in which the new declaration will
6866 be placed. For example, on:
6870 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
6873 Returns a DECL (if a declarator is present), a TYPE (if there is no
6874 declarator, in cases like "struct S;"), or the ERROR_MARK_NODE if an
6878 grokdeclarator (const cp_declarator *declarator,
6879 const cp_decl_specifier_seq *declspecs,
6880 enum decl_context decl_context,
6884 tree type = NULL_TREE;
6886 int virtualp, explicitp, friendp, inlinep, staticp;
6887 int explicit_int = 0;
6888 int explicit_char = 0;
6889 int defaulted_int = 0;
6890 tree dependent_name = NULL_TREE;
6892 tree typedef_decl = NULL_TREE;
6893 const char *name = NULL;
6894 tree typedef_type = NULL_TREE;
6895 /* True if this declarator is a function definition. */
6896 bool funcdef_flag = false;
6897 cp_declarator_kind innermost_code = cdk_error;
6900 /* See the code below that used this. */
6901 tree decl_attr = NULL_TREE;
6904 /* Keep track of what sort of function is being processed
6905 so that we can warn about default return values, or explicit
6906 return values which do not match prescribed defaults. */
6907 special_function_kind sfk = sfk_none;
6909 tree dname = NULL_TREE;
6910 tree ctor_return_type = NULL_TREE;
6911 enum overload_flags flags = NO_SPECIAL;
6912 /* cv-qualifiers that apply to the declarator, for a declaration of
6913 a member function. */
6914 cp_cv_quals memfn_quals = TYPE_UNQUALIFIED;
6915 /* cv-qualifiers that apply to the type specified by the DECLSPECS. */
6917 tree raises = NULL_TREE;
6918 int template_count = 0;
6919 tree returned_attrs = NULL_TREE;
6920 tree parms = NULL_TREE;
6921 const cp_declarator *id_declarator;
6922 /* The unqualified name of the declarator; either an
6923 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
6924 tree unqualified_id;
6925 /* The class type, if any, in which this entity is located,
6926 or NULL_TREE if none. Note that this value may be different from
6927 the current class type; for example if an attempt is made to declare
6928 "A::f" inside "B", this value will be "A". */
6929 tree ctype = current_class_type;
6930 /* The NAMESPACE_DECL for the namespace in which this entity is
6931 located. If an unqualified name is used to declare the entity,
6932 this value will be NULL_TREE, even if the entity is located at
6934 tree in_namespace = NULL_TREE;
6935 cp_storage_class storage_class;
6936 bool unsigned_p, signed_p, short_p, long_p, thread_p;
6937 bool type_was_error_mark_node = false;
6938 bool set_no_warning = false;
6940 signed_p = declspecs->specs[(int)ds_signed];
6941 unsigned_p = declspecs->specs[(int)ds_unsigned];
6942 short_p = declspecs->specs[(int)ds_short];
6943 long_p = declspecs->specs[(int)ds_long];
6944 longlong = declspecs->specs[(int)ds_long] >= 2;
6945 thread_p = declspecs->specs[(int)ds_thread];
6947 if (decl_context == FUNCDEF)
6948 funcdef_flag = true, decl_context = NORMAL;
6949 else if (decl_context == MEMFUNCDEF)
6950 funcdef_flag = true, decl_context = FIELD;
6951 else if (decl_context == BITFIELD)
6952 bitfield = 1, decl_context = FIELD;
6954 /* Look inside a declarator for the name being declared
6955 and get it as a string, for an error message. */
6956 for (id_declarator = declarator;
6958 id_declarator = id_declarator->declarator)
6960 if (id_declarator->kind != cdk_id)
6961 innermost_code = id_declarator->kind;
6963 switch (id_declarator->kind)
6966 if (id_declarator->declarator
6967 && id_declarator->declarator->kind == cdk_id)
6969 sfk = id_declarator->declarator->u.id.sfk;
6970 if (sfk == sfk_destructor)
6977 tree qualifying_scope = id_declarator->u.id.qualifying_scope;
6978 tree decl = id_declarator->u.id.unqualified_name;
6981 if (qualifying_scope)
6983 if (at_function_scope_p ())
6987 A declarator-id shall not be qualified except
6990 None of the cases are permitted in block
6992 if (qualifying_scope == global_namespace)
6993 error ("invalid use of qualified-name %<::%D%>",
6995 else if (TYPE_P (qualifying_scope))
6996 error ("invalid use of qualified-name %<%T::%D%>",
6997 qualifying_scope, decl);
6999 error ("invalid use of qualified-name %<%D::%D%>",
7000 qualifying_scope, decl);
7001 return error_mark_node;
7003 else if (TYPE_P (qualifying_scope))
7005 ctype = qualifying_scope;
7006 if (innermost_code != cdk_function
7007 && current_class_type
7008 && !UNIQUELY_DERIVED_FROM_P (ctype,
7009 current_class_type))
7011 error ("type %qT is not derived from type %qT",
7012 ctype, current_class_type);
7013 return error_mark_node;
7016 else if (TREE_CODE (qualifying_scope) == NAMESPACE_DECL)
7017 in_namespace = qualifying_scope;
7019 switch (TREE_CODE (decl))
7025 if (innermost_code != cdk_function)
7027 error ("declaration of %qD as non-function", decl);
7028 return error_mark_node;
7030 else if (!qualifying_scope
7031 && !(current_class_type && at_class_scope_p ()))
7033 error ("declaration of %qD as non-member", decl);
7034 return error_mark_node;
7037 type = TREE_OPERAND (decl, 0);
7038 name = IDENTIFIER_POINTER (constructor_name (type));
7043 case TEMPLATE_ID_EXPR:
7045 tree fns = TREE_OPERAND (decl, 0);
7048 if (TREE_CODE (dname) != IDENTIFIER_NODE)
7050 gcc_assert (is_overloaded_fn (dname));
7051 dname = DECL_NAME (get_first_fn (dname));
7056 case IDENTIFIER_NODE:
7057 if (TREE_CODE (decl) == IDENTIFIER_NODE)
7060 if (C_IS_RESERVED_WORD (dname))
7062 error ("declarator-id missing; using reserved word %qD",
7064 name = IDENTIFIER_POINTER (dname);
7066 else if (!IDENTIFIER_TYPENAME_P (dname))
7067 name = IDENTIFIER_POINTER (dname);
7070 gcc_assert (flags == NO_SPECIAL);
7071 flags = TYPENAME_FLAG;
7072 ctor_return_type = TREE_TYPE (dname);
7073 sfk = sfk_conversion;
7074 if (is_typename_at_global_scope (dname))
7075 name = IDENTIFIER_POINTER (dname);
7077 name = "<invalid operator>";
7093 return error_mark_node;
7099 if (id_declarator->kind == cdk_id)
7105 The declarator in a function-definition shall have the form
7106 D1 ( parameter-declaration-clause) ... */
7107 if (funcdef_flag && innermost_code != cdk_function)
7109 error ("function definition does not declare parameters");
7110 return error_mark_node;
7113 if (((dname && IDENTIFIER_OPNAME_P (dname)) || flags == TYPENAME_FLAG)
7114 && innermost_code != cdk_function
7115 && ! (ctype && !declspecs->any_specifiers_p))
7117 error ("declaration of %qD as non-function", dname);
7118 return error_mark_node;
7121 /* Anything declared one level down from the top level
7122 must be one of the parameters of a function
7123 (because the body is at least two levels down). */
7125 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
7126 by not allowing C++ class definitions to specify their parameters
7127 with xdecls (must be spec.d in the parmlist).
7129 Since we now wait to push a class scope until we are sure that
7130 we are in a legitimate method context, we must set oldcname
7131 explicitly (since current_class_name is not yet alive).
7133 We also want to avoid calling this a PARM if it is in a namespace. */
7135 if (decl_context == NORMAL && !toplevel_bindings_p ())
7137 struct cp_binding_level *b = current_binding_level;
7138 current_binding_level = b->level_chain;
7139 if (current_binding_level != 0 && toplevel_bindings_p ())
7140 decl_context = PARM;
7141 current_binding_level = b;
7145 name = decl_context == PARM ? "parameter" : "type name";
7147 /* If there were multiple types specified in the decl-specifier-seq,
7148 issue an error message. */
7149 if (declspecs->multiple_types_p)
7151 error ("two or more data types in declaration of %qs", name);
7152 return error_mark_node;
7155 /* Extract the basic type from the decl-specifier-seq. */
7156 type = declspecs->type;
7157 if (type == error_mark_node)
7160 type_was_error_mark_node = true;
7162 /* If the entire declaration is itself tagged as deprecated then
7163 suppress reports of deprecated items. */
7164 if (type && TREE_DEPRECATED (type)
7165 && deprecated_state != DEPRECATED_SUPPRESS)
7166 warn_deprecated_use (type);
7167 if (type && TREE_CODE (type) == TYPE_DECL)
7169 typedef_decl = type;
7170 type = TREE_TYPE (typedef_decl);
7172 /* No type at all: default to `int', and set DEFAULTED_INT
7173 because it was not a user-defined typedef. */
7174 if (type == NULL_TREE && (signed_p || unsigned_p || long_p || short_p))
7176 /* These imply 'int'. */
7177 type = integer_type_node;
7181 explicit_int = declspecs->explicit_int_p;
7182 explicit_char = declspecs->explicit_char_p;
7185 /* See the code below that used this. */
7187 decl_attr = DECL_ATTRIBUTES (typedef_decl);
7189 typedef_type = type;
7192 if (sfk != sfk_conversion)
7193 ctor_return_type = ctype;
7195 if (sfk != sfk_none)
7196 type = check_special_function_return_type (sfk, type,
7198 else if (type == NULL_TREE)
7204 /* We handle `main' specially here, because 'main () { }' is so
7205 common. With no options, it is allowed. With -Wreturn-type,
7206 it is a warning. It is only an error with -pedantic-errors. */
7207 is_main = (funcdef_flag
7208 && dname && MAIN_NAME_P (dname)
7209 && ctype == NULL_TREE
7210 && in_namespace == NULL_TREE
7211 && current_namespace == global_namespace);
7213 if (type_was_error_mark_node)
7214 /* We've already issued an error, don't complain more. */;
7215 else if (in_system_header || flag_ms_extensions)
7216 /* Allow it, sigh. */;
7217 else if (pedantic || ! is_main)
7218 pedwarn ("ISO C++ forbids declaration of %qs with no type", name);
7219 else if (warn_return_type)
7220 warning (0, "ISO C++ forbids declaration of %qs with no type", name);
7222 type = integer_type_node;
7227 /* Now process the modifiers that were specified
7228 and check for invalid combinations. */
7230 /* Long double is a special combination. */
7231 if (long_p && !longlong && TYPE_MAIN_VARIANT (type) == double_type_node)
7234 type = build_qualified_type (long_double_type_node,
7235 cp_type_quals (type));
7238 /* Check all other uses of type modifiers. */
7240 if (unsigned_p || signed_p || long_p || short_p)
7244 if ((signed_p || unsigned_p) && TREE_CODE (type) != INTEGER_TYPE)
7245 error ("%<signed%> or %<unsigned%> invalid for %qs", name);
7246 else if (signed_p && unsigned_p)
7247 error ("%<signed%> and %<unsigned%> specified together for %qs", name);
7248 else if (longlong && TREE_CODE (type) != INTEGER_TYPE)
7249 error ("%<long long%> invalid for %qs", name);
7250 else if (long_p && TREE_CODE (type) == REAL_TYPE)
7251 error ("%<long%> invalid for %qs", name);
7252 else if (short_p && TREE_CODE (type) == REAL_TYPE)
7253 error ("%<short%> invalid for %qs", name);
7254 else if ((long_p || short_p) && TREE_CODE (type) != INTEGER_TYPE)
7255 error ("%<long%> or %<short%> invalid for %qs", name);
7256 else if ((long_p || short_p) && explicit_char)
7257 error ("%<long%> or %<short%> specified with char for %qs", name);
7258 else if (long_p && short_p)
7259 error ("%<long%> and %<short%> specified together for %qs", name);
7263 if (!explicit_int && !defaulted_int && !explicit_char && pedantic)
7265 pedwarn ("long, short, signed or unsigned used invalidly for %qs",
7267 if (flag_pedantic_errors)
7272 /* Discard the type modifiers if they are invalid. */
7283 /* Decide whether an integer type is signed or not.
7284 Optionally treat bitfields as signed by default. */
7288 It is implementation-defined whether a plain (neither
7289 explicitly signed or unsigned) char, short, int, or long
7290 bit-field is signed or unsigned.
7292 Naturally, we extend this to long long as well. Note that
7293 this does not include wchar_t. */
7294 || (bitfield && !flag_signed_bitfields
7296 /* A typedef for plain `int' without `signed' can be
7297 controlled just like plain `int', but a typedef for
7298 `signed int' cannot be so controlled. */
7300 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl))
7301 && TREE_CODE (type) == INTEGER_TYPE
7302 && !same_type_p (TYPE_MAIN_VARIANT (type), wchar_type_node)))
7305 type = long_long_unsigned_type_node;
7307 type = long_unsigned_type_node;
7309 type = short_unsigned_type_node;
7310 else if (type == char_type_node)
7311 type = unsigned_char_type_node;
7312 else if (typedef_decl)
7313 type = c_common_unsigned_type (type);
7315 type = unsigned_type_node;
7317 else if (signed_p && type == char_type_node)
7318 type = signed_char_type_node;
7320 type = long_long_integer_type_node;
7322 type = long_integer_type_node;
7324 type = short_integer_type_node;
7326 if (declspecs->specs[(int)ds_complex])
7328 if (TREE_CODE (type) != INTEGER_TYPE && TREE_CODE (type) != REAL_TYPE)
7329 error ("complex invalid for %qs", name);
7330 /* If we just have "complex", it is equivalent to
7331 "complex double", but if any modifiers at all are specified it is
7332 the complex form of TYPE. E.g, "complex short" is
7333 "complex short int". */
7335 else if (defaulted_int && ! longlong
7336 && ! (long_p || short_p || signed_p || unsigned_p))
7337 type = complex_double_type_node;
7338 else if (type == integer_type_node)
7339 type = complex_integer_type_node;
7340 else if (type == float_type_node)
7341 type = complex_float_type_node;
7342 else if (type == double_type_node)
7343 type = complex_double_type_node;
7344 else if (type == long_double_type_node)
7345 type = complex_long_double_type_node;
7347 type = build_complex_type (type);
7350 type_quals = TYPE_UNQUALIFIED;
7351 if (declspecs->specs[(int)ds_const])
7352 type_quals |= TYPE_QUAL_CONST;
7353 if (declspecs->specs[(int)ds_volatile])
7354 type_quals |= TYPE_QUAL_VOLATILE;
7355 if (declspecs->specs[(int)ds_restrict])
7356 type_quals |= TYPE_QUAL_RESTRICT;
7357 if (sfk == sfk_conversion && type_quals != TYPE_UNQUALIFIED)
7358 error ("qualifiers are not allowed on declaration of %<operator %T%>",
7361 if (TREE_CODE (type) == FUNCTION_TYPE
7362 && type_quals != TYPE_UNQUALIFIED)
7364 /* This was an error in C++98 (cv-qualifiers cannot be added to
7365 a function type), but DR 295 makes the code well-formed by
7366 dropping the extra qualifiers. */
7369 tree bad_type = build_qualified_type (type, type_quals);
7370 pedwarn ("ignoring %qV qualifiers added to function type %qT",
7373 type_quals = TYPE_UNQUALIFIED;
7375 type_quals |= cp_type_quals (type);
7376 type = cp_build_qualified_type_real
7377 (type, type_quals, ((typedef_decl && !DECL_ARTIFICIAL (typedef_decl)
7378 ? tf_ignore_bad_quals : 0) | tf_warning_or_error));
7379 /* We might have ignored or rejected some of the qualifiers. */
7380 type_quals = cp_type_quals (type);
7383 inlinep = !! declspecs->specs[(int)ds_inline];
7384 virtualp = !! declspecs->specs[(int)ds_virtual];
7385 explicitp = !! declspecs->specs[(int)ds_explicit];
7387 storage_class = declspecs->storage_class;
7388 if (storage_class == sc_static)
7389 staticp = 1 + (decl_context == FIELD);
7391 if (virtualp && staticp == 2)
7393 error ("member %qD cannot be declared both virtual and static", dname);
7394 storage_class = sc_none;
7397 friendp = !! declspecs->specs[(int)ds_friend];
7399 if (dependent_name && !friendp)
7401 error ("%<%T::%D%> is not a valid declarator", ctype, dependent_name);
7402 return error_mark_node;
7405 /* Issue errors about use of storage classes for parameters. */
7406 if (decl_context == PARM)
7408 if (declspecs->specs[(int)ds_typedef])
7410 error ("typedef declaration invalid in parameter declaration");
7411 return error_mark_node;
7413 else if (storage_class == sc_static
7414 || storage_class == sc_extern
7416 error ("storage class specifiers invalid in parameter declarations");
7419 /* Give error if `virtual' is used outside of class declaration. */
7421 && (current_class_name == NULL_TREE || decl_context != FIELD))
7423 error ("virtual outside class declaration");
7427 /* Static anonymous unions are dealt with here. */
7428 if (staticp && decl_context == TYPENAME
7430 && ANON_AGGR_TYPE_P (declspecs->type))
7431 decl_context = FIELD;
7433 /* Warn about storage classes that are invalid for certain
7434 kinds of declarations (parameters, typenames, etc.). */
7435 if (declspecs->conflicting_specifiers_p)
7437 error ("conflicting specifiers in declaration of %qs", name);
7438 storage_class = sc_none;
7442 && storage_class != sc_extern
7443 && storage_class != sc_static)
7444 || declspecs->specs[(int)ds_typedef]))
7446 error ("multiple storage classes in declaration of %qs", name);
7449 else if (decl_context != NORMAL
7450 && ((storage_class != sc_none
7451 && storage_class != sc_mutable)
7454 if ((decl_context == PARM || decl_context == CATCHPARM)
7455 && (storage_class == sc_register
7456 || storage_class == sc_auto))
7458 else if (declspecs->specs[(int)ds_typedef])
7460 else if (decl_context == FIELD
7461 /* C++ allows static class elements. */
7462 && storage_class == sc_static)
7463 /* C++ also allows inlines and signed and unsigned elements,
7464 but in those cases we don't come in here. */
7468 if (decl_context == FIELD)
7469 error ("storage class specified for %qs", name);
7472 if (decl_context == PARM || decl_context == CATCHPARM)
7473 error ("storage class specified for parameter %qs", name);
7475 error ("storage class specified for typename");
7477 if (storage_class == sc_register
7478 || storage_class == sc_auto
7479 || storage_class == sc_extern
7481 storage_class = sc_none;
7484 else if (storage_class == sc_extern && initialized
7487 if (toplevel_bindings_p ())
7489 /* It's common practice (and completely valid) to have a const
7490 be initialized and declared extern. */
7491 if (!(type_quals & TYPE_QUAL_CONST))
7492 warning (0, "%qs initialized and declared %<extern%>", name);
7495 error ("%qs has both %<extern%> and initializer", name);
7497 else if (storage_class == sc_extern && funcdef_flag
7498 && ! toplevel_bindings_p ())
7499 error ("nested function %qs declared %<extern%>", name);
7500 else if (toplevel_bindings_p ())
7502 if (storage_class == sc_auto)
7503 error ("top-level declaration of %qs specifies %<auto%>", name);
7506 && storage_class != sc_extern
7507 && storage_class != sc_static)
7509 error ("function-scope %qs implicitly auto and declared %<__thread%>",
7514 if (storage_class && friendp)
7515 error ("storage class specifiers invalid in friend function declarations");
7518 unqualified_id = NULL_TREE;
7521 unqualified_id = id_declarator->u.id.unqualified_name;
7522 switch (TREE_CODE (unqualified_id))
7526 = constructor_name (TREE_OPERAND (unqualified_id, 0));
7529 case IDENTIFIER_NODE:
7530 case TEMPLATE_ID_EXPR:
7538 /* Determine the type of the entity declared by recurring on the
7540 for (; declarator; declarator = declarator->declarator)
7542 const cp_declarator *inner_declarator;
7545 if (type == error_mark_node)
7546 return error_mark_node;
7548 attrs = declarator->attributes;
7554 if (declarator == NULL || declarator->kind == cdk_id)
7555 attr_flags |= (int) ATTR_FLAG_DECL_NEXT;
7556 if (declarator->kind == cdk_function)
7557 attr_flags |= (int) ATTR_FLAG_FUNCTION_NEXT;
7558 if (declarator->kind == cdk_array)
7559 attr_flags |= (int) ATTR_FLAG_ARRAY_NEXT;
7560 returned_attrs = decl_attributes (&type,
7561 chainon (returned_attrs, attrs),
7565 if (declarator->kind == cdk_id)
7568 inner_declarator = declarator->declarator;
7570 switch (declarator->kind)
7573 type = create_array_type_for_decl (dname, type,
7574 declarator->u.array.bounds);
7582 /* Declaring a function type.
7583 Make sure we have a valid type for the function to return. */
7585 if (type_quals != TYPE_UNQUALIFIED)
7587 if (SCALAR_TYPE_P (type) || VOID_TYPE_P (type))
7588 warning (OPT_Wreturn_type,
7589 "type qualifiers ignored on function return type");
7590 /* We now know that the TYPE_QUALS don't apply to the
7591 decl, but to its return type. */
7592 type_quals = TYPE_UNQUALIFIED;
7593 set_no_warning = true;
7596 /* Warn about some types functions can't return. */
7598 if (TREE_CODE (type) == FUNCTION_TYPE)
7600 error ("%qs declared as function returning a function", name);
7601 type = integer_type_node;
7603 if (TREE_CODE (type) == ARRAY_TYPE)
7605 error ("%qs declared as function returning an array", name);
7606 type = integer_type_node;
7609 /* Pick up type qualifiers which should be applied to `this'. */
7610 memfn_quals = declarator->u.function.qualifiers;
7612 /* Pick up the exception specifications. */
7613 raises = declarator->u.function.exception_specification;
7615 /* Say it's a definition only for the CALL_EXPR
7616 closest to the identifier. */
7617 funcdecl_p = inner_declarator && inner_declarator->kind == cdk_id;
7619 if (ctype == NULL_TREE
7620 && decl_context == FIELD
7622 && (friendp == 0 || dname == current_class_name))
7623 ctype = current_class_type;
7625 if (ctype && (sfk == sfk_constructor
7626 || sfk == sfk_destructor))
7628 /* We are within a class's scope. If our declarator name
7629 is the same as the class name, and we are defining
7630 a function, then it is a constructor/destructor, and
7631 therefore returns a void type. */
7633 /* ISO C++ 12.4/2. A destructor may not be declared
7634 const or volatile. A destructor may not be
7637 ISO C++ 12.1. A constructor may not be declared
7638 const or volatile. A constructor may not be
7639 virtual. A constructor may not be static. */
7641 error ((flags == DTOR_FLAG)
7642 ? "destructor cannot be static member function"
7643 : "constructor cannot be static member function");
7646 error ((flags == DTOR_FLAG)
7647 ? "destructors may not be cv-qualified"
7648 : "constructors may not be cv-qualified");
7649 memfn_quals = TYPE_UNQUALIFIED;
7652 if (decl_context == FIELD
7653 && !member_function_or_else (ctype,
7656 return error_mark_node;
7658 if (flags != DTOR_FLAG)
7660 /* It's a constructor. */
7665 pedwarn ("constructors cannot be declared virtual");
7668 if (decl_context == FIELD
7669 && sfk != sfk_constructor)
7670 return error_mark_node;
7672 if (decl_context == FIELD)
7678 error ("can't initialize friend function %qs", name);
7681 /* Cannot be both friend and virtual. */
7682 error ("virtual functions cannot be friends");
7685 if (decl_context == NORMAL)
7686 error ("friend declaration not in class definition");
7687 if (current_function_decl && funcdef_flag)
7688 error ("can't define friend function %qs in a local "
7693 arg_types = grokparms (declarator->u.function.parameters,
7696 if (inner_declarator
7697 && inner_declarator->kind == cdk_id
7698 && inner_declarator->u.id.sfk == sfk_destructor
7699 && arg_types != void_list_node)
7701 error ("destructors may not have parameters");
7702 arg_types = void_list_node;
7706 type = build_function_type (type, arg_types);
7713 /* Filter out pointers-to-references and references-to-references.
7714 We can get these if a TYPE_DECL is used. */
7716 if (TREE_CODE (type) == REFERENCE_TYPE)
7718 error (declarator->kind == cdk_reference
7719 ? "cannot declare reference to %q#T"
7720 : "cannot declare pointer to %q#T", type);
7721 type = TREE_TYPE (type);
7723 else if (VOID_TYPE_P (type))
7725 if (declarator->kind == cdk_reference)
7726 error ("cannot declare reference to %q#T", type);
7727 else if (declarator->kind == cdk_ptrmem)
7728 error ("cannot declare pointer to %q#T member", type);
7731 /* We now know that the TYPE_QUALS don't apply to the decl,
7732 but to the target of the pointer. */
7733 type_quals = TYPE_UNQUALIFIED;
7735 if (declarator->kind == cdk_ptrmem
7736 && (TREE_CODE (type) == FUNCTION_TYPE || memfn_quals))
7738 memfn_quals |= cp_type_quals (type);
7739 type = build_memfn_type (type,
7740 declarator->u.pointer.class_type,
7742 memfn_quals = TYPE_UNQUALIFIED;
7745 if (declarator->kind == cdk_reference)
7747 if (!VOID_TYPE_P (type))
7748 type = build_reference_type (type);
7750 else if (TREE_CODE (type) == METHOD_TYPE)
7751 type = build_ptrmemfunc_type (build_pointer_type (type));
7752 else if (declarator->kind == cdk_ptrmem)
7754 gcc_assert (TREE_CODE (declarator->u.pointer.class_type)
7756 if (declarator->u.pointer.class_type == error_mark_node)
7757 /* We will already have complained. */
7758 type = error_mark_node;
7760 type = build_ptrmem_type (declarator->u.pointer.class_type,
7764 type = build_pointer_type (type);
7766 /* Process a list of type modifier keywords (such as
7767 const or volatile) that were given inside the `*' or `&'. */
7769 if (declarator->u.pointer.qualifiers)
7772 = cp_build_qualified_type (type,
7773 declarator->u.pointer.qualifiers);
7774 type_quals = cp_type_quals (type);
7787 if (unqualified_id && TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR
7788 && TREE_CODE (type) != FUNCTION_TYPE
7789 && TREE_CODE (type) != METHOD_TYPE)
7791 error ("template-id %qD used as a declarator",
7793 unqualified_id = dname;
7796 /* If TYPE is a FUNCTION_TYPE, but the function name was explicitly
7797 qualified with a class-name, turn it into a METHOD_TYPE, unless
7798 we know that the function is static. We take advantage of this
7799 opportunity to do other processing that pertains to entities
7800 explicitly declared to be class members. Note that if DECLARATOR
7801 is non-NULL, we know it is a cdk_id declarator; otherwise, we
7802 would not have exited the loop above. */
7804 && declarator->u.id.qualifying_scope
7805 && TYPE_P (declarator->u.id.qualifying_scope))
7809 ctype = declarator->u.id.qualifying_scope;
7810 ctype = TYPE_MAIN_VARIANT (ctype);
7812 while (t != NULL_TREE && CLASS_TYPE_P (t))
7814 /* You're supposed to have one `template <...>' for every
7815 template class, but you don't need one for a full
7816 specialization. For example:
7818 template <class T> struct S{};
7819 template <> struct S<int> { void f(); };
7820 void S<int>::f () {}
7822 is correct; there shouldn't be a `template <>' for the
7823 definition of `S<int>::f'. */
7824 if (CLASSTYPE_TEMPLATE_SPECIALIZATION (t)
7825 && !any_dependent_template_arguments_p (CLASSTYPE_TI_ARGS (t)))
7826 /* T is an explicit (not partial) specialization. All
7827 containing classes must therefore also be explicitly
7830 if ((CLASSTYPE_USE_TEMPLATE (t) || CLASSTYPE_IS_TEMPLATE (t))
7831 && PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (t)))
7832 template_count += 1;
7834 t = TYPE_MAIN_DECL (t);
7835 t = DECL_CONTEXT (t);
7838 if (ctype == current_class_type)
7841 pedwarn ("member functions are implicitly friends of their class");
7843 pedwarn ("extra qualification %<%T::%> on member %qs",
7846 else if (/* If the qualifying type is already complete, then we
7847 can skip the following checks. */
7848 !COMPLETE_TYPE_P (ctype)
7849 && (/* If the function is being defined, then
7850 qualifying type must certainly be complete. */
7852 /* A friend declaration of "T::f" is OK, even if
7853 "T" is a template parameter. But, if this
7854 function is not a friend, the qualifying type
7856 || (!friendp && !CLASS_TYPE_P (ctype))
7857 /* For a declaration, the type need not be
7858 complete, if either it is dependent (since there
7859 is no meaningful definition of complete in that
7860 case) or the qualifying class is currently being
7862 || !(dependent_type_p (ctype)
7863 || currently_open_class (ctype)))
7864 /* Check that the qualifying type is complete. */
7865 && !complete_type_or_else (ctype, NULL_TREE))
7866 return error_mark_node;
7867 else if (TREE_CODE (type) == FUNCTION_TYPE)
7869 tree sname = declarator->u.id.unqualified_name;
7871 if (current_class_type
7872 && (!friendp || funcdef_flag))
7875 ? "cannot define member function %<%T::%s%> within %<%T%>"
7876 : "cannot declare member function %<%T::%s%> within %<%T%>",
7877 ctype, name, current_class_type);
7878 return error_mark_node;
7881 if (TREE_CODE (sname) == IDENTIFIER_NODE
7882 && NEW_DELETE_OPNAME_P (sname))
7883 /* Overloaded operator new and operator delete
7884 are always static functions. */
7887 type = build_memfn_type (type, ctype, memfn_quals);
7889 else if (declspecs->specs[(int)ds_typedef]
7890 && current_class_type)
7892 error ("cannot declare member %<%T::%s%> within %qT",
7893 ctype, name, current_class_type);
7894 return error_mark_node;
7898 /* Now TYPE has the actual type. */
7903 *attrlist = chainon (returned_attrs, *attrlist);
7905 attrlist = &returned_attrs;
7908 /* Did array size calculations overflow? */
7910 if (TREE_CODE (type) == ARRAY_TYPE
7911 && COMPLETE_TYPE_P (type)
7912 && TREE_CODE (TYPE_SIZE_UNIT (type)) == INTEGER_CST
7913 && TREE_OVERFLOW (TYPE_SIZE_UNIT (type)))
7915 error ("size of array %qs is too large", name);
7916 /* If we proceed with the array type as it is, we'll eventually
7917 crash in tree_low_cst(). */
7918 type = error_mark_node;
7921 if ((decl_context == FIELD || decl_context == PARM)
7922 && !processing_template_decl
7923 && variably_modified_type_p (type, NULL_TREE))
7925 if (decl_context == FIELD)
7926 error ("data member may not have variably modified type %qT", type);
7928 error ("parameter may not have variably modified type %qT", type);
7929 type = error_mark_node;
7932 if (explicitp == 1 || (explicitp && friendp))
7934 /* [dcl.fct.spec] The explicit specifier shall only be used in
7935 declarations of constructors within a class definition. */
7936 error ("only declarations of constructors can be %<explicit%>");
7940 if (storage_class == sc_mutable)
7942 if (decl_context != FIELD || friendp)
7944 error ("non-member %qs cannot be declared %<mutable%>", name);
7945 storage_class = sc_none;
7947 else if (decl_context == TYPENAME || declspecs->specs[(int)ds_typedef])
7949 error ("non-object member %qs cannot be declared %<mutable%>", name);
7950 storage_class = sc_none;
7952 else if (TREE_CODE (type) == FUNCTION_TYPE
7953 || TREE_CODE (type) == METHOD_TYPE)
7955 error ("function %qs cannot be declared %<mutable%>", name);
7956 storage_class = sc_none;
7960 error ("static %qs cannot be declared %<mutable%>", name);
7961 storage_class = sc_none;
7963 else if (type_quals & TYPE_QUAL_CONST)
7965 error ("const %qs cannot be declared %<mutable%>", name);
7966 storage_class = sc_none;
7970 /* If this is declaring a typedef name, return a TYPE_DECL. */
7971 if (declspecs->specs[(int)ds_typedef] && decl_context != TYPENAME)
7975 /* Note that the grammar rejects storage classes
7976 in typenames, fields or parameters. */
7977 if (current_lang_name == lang_name_java)
7978 TYPE_FOR_JAVA (type) = 1;
7980 /* This declaration:
7982 typedef void f(int) const;
7984 declares a function type which is not a member of any
7985 particular class, but which is cv-qualified; for
7986 example "f S::*" declares a pointer to a const-qualified
7987 member function of S. We record the cv-qualification in the
7989 if (memfn_quals && TREE_CODE (type) == FUNCTION_TYPE)
7990 type = cp_build_qualified_type (type, memfn_quals);
7992 if (decl_context == FIELD)
7993 decl = build_lang_decl (TYPE_DECL, unqualified_id, type);
7995 decl = build_decl (TYPE_DECL, unqualified_id, type);
7996 if (id_declarator && declarator->u.id.qualifying_scope)
7997 error ("%Jtypedef name may not be a nested-name-specifier", decl);
7999 if (decl_context != FIELD)
8001 if (!current_function_decl)
8002 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
8003 else if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (current_function_decl)
8004 || (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P
8005 (current_function_decl)))
8006 /* The TYPE_DECL is "abstract" because there will be
8007 clones of this constructor/destructor, and there will
8008 be copies of this TYPE_DECL generated in those
8010 DECL_ABSTRACT (decl) = 1;
8012 else if (constructor_name_p (unqualified_id, current_class_type))
8013 pedwarn ("ISO C++ forbids nested type %qD with same name "
8014 "as enclosing class",
8017 /* If the user declares "typedef struct {...} foo" then the
8018 struct will have an anonymous name. Fill that name in now.
8019 Nothing can refer to it, so nothing needs know about the name
8021 if (type != error_mark_node
8024 && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
8025 && TYPE_ANONYMOUS_P (type)
8026 /* Don't do this if there are attributes. */
8027 && (!attrlist || !*attrlist)
8028 && cp_type_quals (type) == TYPE_UNQUALIFIED)
8030 tree oldname = TYPE_NAME (type);
8033 /* Replace the anonymous name with the real name everywhere. */
8034 for (t = TYPE_MAIN_VARIANT (type); t; t = TYPE_NEXT_VARIANT (t))
8035 if (TYPE_NAME (t) == oldname)
8036 TYPE_NAME (t) = decl;
8038 if (TYPE_LANG_SPECIFIC (type))
8039 TYPE_WAS_ANONYMOUS (type) = 1;
8041 /* If this is a typedef within a template class, the nested
8042 type is a (non-primary) template. The name for the
8043 template needs updating as well. */
8044 if (TYPE_LANG_SPECIFIC (type) && CLASSTYPE_TEMPLATE_INFO (type))
8045 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type))
8046 = TYPE_IDENTIFIER (type);
8048 /* FIXME remangle member functions; member functions of a
8049 type with external linkage have external linkage. */
8052 /* Any qualifiers on a function type typedef have already been
8054 if (memfn_quals && !ctype && TREE_CODE (type) == FUNCTION_TYPE)
8055 memfn_quals = TYPE_UNQUALIFIED;
8058 || (typedef_decl && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl)))
8059 C_TYPEDEF_EXPLICITLY_SIGNED (decl) = 1;
8061 bad_specifiers (decl, "type", virtualp,
8062 memfn_quals != TYPE_UNQUALIFIED,
8063 inlinep, friendp, raises != NULL_TREE);
8068 /* Detect the case of an array type of unspecified size
8069 which came, as such, direct from a typedef name.
8070 We must copy the type, so that the array's domain can be
8071 individually set by the object's initializer. */
8073 if (type && typedef_type
8074 && TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type)
8075 && TYPE_MAIN_VARIANT (type) == TYPE_MAIN_VARIANT (typedef_type))
8076 type = build_cplus_array_type (TREE_TYPE (type), NULL_TREE);
8078 /* Detect where we're using a typedef of function type to declare a
8079 function. PARMS will not be set, so we must create it now. */
8081 if (type == typedef_type && TREE_CODE (type) == FUNCTION_TYPE)
8083 tree decls = NULL_TREE;
8086 for (args = TYPE_ARG_TYPES (type); args; args = TREE_CHAIN (args))
8088 tree decl = cp_build_parm_decl (NULL_TREE, TREE_VALUE (args));
8090 TREE_CHAIN (decl) = decls;
8094 parms = nreverse (decls);
8096 if (decl_context != TYPENAME)
8098 /* A cv-qualifier-seq shall only be part of the function type
8099 for a non-static member function. [8.3.5/4 dcl.fct] */
8100 if (cp_type_quals (type) != TYPE_UNQUALIFIED
8101 && (current_class_type == NULL_TREE || staticp) )
8104 ? G_("qualified function types cannot be used to "
8105 "declare static member functions")
8106 : G_("qualified function types cannot be used to "
8107 "declare free functions"));
8108 type = TYPE_MAIN_VARIANT (type);
8111 /* The qualifiers on the function type become the qualifiers on
8112 the non-static member function. */
8113 memfn_quals |= cp_type_quals (type);
8117 /* If this is a type name (such as, in a cast or sizeof),
8118 compute the type and return it now. */
8120 if (decl_context == TYPENAME)
8122 /* Note that the grammar rejects storage classes
8123 in typenames, fields or parameters. */
8124 if (type_quals != TYPE_UNQUALIFIED)
8125 type_quals = TYPE_UNQUALIFIED;
8127 /* Special case: "friend class foo" looks like a TYPENAME context. */
8130 if (type_quals != TYPE_UNQUALIFIED)
8132 error ("type qualifiers specified for friend class declaration");
8133 type_quals = TYPE_UNQUALIFIED;
8137 error ("%<inline%> specified for friend class declaration");
8143 /* Don't allow friend declaration without a class-key. */
8144 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
8145 pedwarn ("template parameters cannot be friends");
8146 else if (TREE_CODE (type) == TYPENAME_TYPE)
8147 pedwarn ("friend declaration requires class-key, "
8148 "i.e. %<friend class %T::%D%>",
8149 TYPE_CONTEXT (type), TYPENAME_TYPE_FULLNAME (type));
8151 pedwarn ("friend declaration requires class-key, "
8152 "i.e. %<friend %#T%>",
8156 /* Only try to do this stuff if we didn't already give up. */
8157 if (type != integer_type_node)
8159 /* A friendly class? */
8160 if (current_class_type)
8161 make_friend_class (current_class_type, TYPE_MAIN_VARIANT (type),
8164 error ("trying to make class %qT a friend of global scope",
8167 type = void_type_node;
8170 else if (memfn_quals)
8172 if (ctype == NULL_TREE)
8174 if (TREE_CODE (type) != METHOD_TYPE)
8175 error ("invalid qualifiers on non-member function type");
8177 ctype = TYPE_METHOD_BASETYPE (type);
8180 type = build_memfn_type (type, ctype, memfn_quals);
8185 else if (unqualified_id == NULL_TREE && decl_context != PARM
8186 && decl_context != CATCHPARM
8187 && TREE_CODE (type) != UNION_TYPE
8190 error ("abstract declarator %qT used as declaration", type);
8191 return error_mark_node;
8194 /* Only functions may be declared using an operator-function-id. */
8196 && IDENTIFIER_OPNAME_P (unqualified_id)
8197 && TREE_CODE (type) != FUNCTION_TYPE
8198 && TREE_CODE (type) != METHOD_TYPE)
8200 error ("declaration of %qD as non-function", unqualified_id);
8201 return error_mark_node;
8204 /* We don't check parameter types here because we can emit a better
8205 error message later. */
8206 if (decl_context != PARM)
8208 type = check_var_type (unqualified_id, type);
8209 if (type == error_mark_node)
8210 return error_mark_node;
8213 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
8214 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
8216 if (decl_context == PARM || decl_context == CATCHPARM)
8218 if (ctype || in_namespace)
8219 error ("cannot use %<::%> in parameter declaration");
8221 /* A parameter declared as an array of T is really a pointer to T.
8222 One declared as a function is really a pointer to a function.
8223 One declared as a member is really a pointer to member. */
8225 if (TREE_CODE (type) == ARRAY_TYPE)
8227 /* Transfer const-ness of array into that of type pointed to. */
8228 type = build_pointer_type (TREE_TYPE (type));
8229 type_quals = TYPE_UNQUALIFIED;
8231 else if (TREE_CODE (type) == FUNCTION_TYPE)
8232 type = build_pointer_type (type);
8238 if (decl_context == PARM)
8240 decl = cp_build_parm_decl (unqualified_id, type);
8242 bad_specifiers (decl, "parameter", virtualp,
8243 memfn_quals != TYPE_UNQUALIFIED,
8244 inlinep, friendp, raises != NULL_TREE);
8246 else if (decl_context == FIELD)
8248 /* The C99 flexible array extension. */
8249 if (!staticp && TREE_CODE (type) == ARRAY_TYPE
8250 && TYPE_DOMAIN (type) == NULL_TREE)
8252 tree itype = compute_array_index_type (dname, integer_zero_node);
8253 type = build_cplus_array_type (TREE_TYPE (type), itype);
8256 if (type == error_mark_node)
8258 /* Happens when declaring arrays of sizes which
8259 are error_mark_node, for example. */
8262 else if (in_namespace && !friendp)
8264 /* Something like struct S { int N::j; }; */
8265 error ("invalid use of %<::%>");
8266 return error_mark_node;
8268 else if (TREE_CODE (type) == FUNCTION_TYPE)
8271 tree function_context;
8275 if (ctype == NULL_TREE)
8276 ctype = current_class_type;
8278 if (ctype == NULL_TREE)
8280 error ("can't make %qD into a method -- not in a class",
8282 return error_mark_node;
8285 /* ``A union may [ ... ] not [ have ] virtual functions.''
8287 if (virtualp && TREE_CODE (ctype) == UNION_TYPE)
8289 error ("function %qD declared virtual inside a union",
8291 return error_mark_node;
8294 if (NEW_DELETE_OPNAME_P (unqualified_id))
8298 error ("%qD cannot be declared virtual, since it "
8304 else if (staticp < 2)
8305 type = build_memfn_type (type, ctype, memfn_quals);
8308 /* Check that the name used for a destructor makes sense. */
8309 if (sfk == sfk_destructor)
8313 gcc_assert (friendp);
8314 error ("expected qualified name in friend declaration "
8315 "for destructor %qD",
8316 id_declarator->u.id.unqualified_name);
8317 return error_mark_node;
8320 if (!same_type_p (TREE_OPERAND
8321 (id_declarator->u.id.unqualified_name, 0),
8324 error ("declaration of %qD as member of %qT",
8325 id_declarator->u.id.unqualified_name, ctype);
8326 return error_mark_node;
8330 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
8331 function_context = (ctype != NULL_TREE) ?
8332 decl_function_context (TYPE_MAIN_DECL (ctype)) : NULL_TREE;
8333 publicp = (! friendp || ! staticp)
8334 && function_context == NULL_TREE;
8335 decl = grokfndecl (ctype, type,
8336 TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
8337 ? unqualified_id : dname,
8340 virtualp, flags, memfn_quals, raises,
8341 friendp ? -1 : 0, friendp, publicp, inlinep,
8343 funcdef_flag, template_count, in_namespace, attrlist);
8344 if (decl == NULL_TREE)
8345 return error_mark_node;
8347 /* This clobbers the attrs stored in `decl' from `attrlist'. */
8348 /* The decl and setting of decl_attr is also turned off. */
8349 decl = build_decl_attribute_variant (decl, decl_attr);
8352 /* [class.conv.ctor]
8354 A constructor declared without the function-specifier
8355 explicit that can be called with a single parameter
8356 specifies a conversion from the type of its first
8357 parameter to the type of its class. Such a constructor
8358 is called a converting constructor. */
8360 DECL_NONCONVERTING_P (decl) = 1;
8361 else if (DECL_CONSTRUCTOR_P (decl))
8363 /* The constructor can be called with exactly one
8364 parameter if there is at least one parameter, and
8365 any subsequent parameters have default arguments.
8366 Ignore any compiler-added parms. */
8367 tree arg_types = FUNCTION_FIRST_USER_PARMTYPE (decl);
8369 if (arg_types == void_list_node
8371 && TREE_CHAIN (arg_types)
8372 && TREE_CHAIN (arg_types) != void_list_node
8373 && !TREE_PURPOSE (TREE_CHAIN (arg_types))))
8374 DECL_NONCONVERTING_P (decl) = 1;
8377 else if (TREE_CODE (type) == METHOD_TYPE)
8379 /* We only get here for friend declarations of
8380 members of other classes. */
8381 /* All method decls are public, so tell grokfndecl to set
8382 TREE_PUBLIC, also. */
8383 decl = grokfndecl (ctype, type,
8384 TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
8385 ? unqualified_id : dname,
8388 virtualp, flags, memfn_quals, raises,
8389 friendp ? -1 : 0, friendp, 1, 0, sfk,
8390 funcdef_flag, template_count, in_namespace,
8392 if (decl == NULL_TREE)
8393 return error_mark_node;
8395 else if (!staticp && !dependent_type_p (type)
8396 && !COMPLETE_TYPE_P (complete_type (type))
8397 && (TREE_CODE (type) != ARRAY_TYPE || initialized == 0))
8400 error ("field %qD has incomplete type", unqualified_id);
8402 error ("name %qT has incomplete type", type);
8404 /* If we're instantiating a template, tell them which
8405 instantiation made the field's type be incomplete. */
8406 if (current_class_type
8407 && TYPE_NAME (current_class_type)
8408 && IDENTIFIER_TEMPLATE (TYPE_IDENTIFIER (current_class_type))
8410 && declspecs->type == type)
8411 error (" in instantiation of template %qT",
8412 current_class_type);
8414 return error_mark_node;
8420 error ("%qE is neither function nor member function; "
8421 "cannot be declared friend", unqualified_id);
8429 /* Friends are treated specially. */
8430 if (ctype == current_class_type)
8431 ; /* We already issued a pedwarn. */
8432 else if (decl && DECL_NAME (decl))
8434 if (template_class_depth (current_class_type) == 0)
8436 decl = check_explicit_specialization
8437 (unqualified_id, decl, template_count,
8438 2 * funcdef_flag + 4);
8439 if (decl == error_mark_node)
8440 return error_mark_node;
8443 decl = do_friend (ctype, unqualified_id, decl,
8449 return error_mark_node;
8452 /* Structure field. It may not be a function, except for C++. */
8454 if (decl == NULL_TREE)
8460 /* An attempt is being made to initialize a non-static
8461 member. But, from [class.mem]:
8463 4 A member-declarator can contain a
8464 constant-initializer only if it declares a static
8465 member (_class.static_) of integral or enumeration
8466 type, see _class.static.data_.
8468 This used to be relatively common practice, but
8469 the rest of the compiler does not correctly
8470 handle the initialization unless the member is
8471 static so we make it static below. */
8472 pedwarn ("ISO C++ forbids initialization of member %qD",
8474 pedwarn ("making %qD static", unqualified_id);
8478 if (uses_template_parms (type))
8479 /* We'll check at instantiation time. */
8481 else if (check_static_variable_definition (unqualified_id,
8483 /* If we just return the declaration, crashes
8484 will sometimes occur. We therefore return
8485 void_type_node, as if this was a friend
8486 declaration, to cause callers to completely
8487 ignore this declaration. */
8488 return error_mark_node;
8493 /* C++ allows static class members. All other work
8494 for this is done by grokfield. */
8495 decl = build_lang_decl (VAR_DECL, unqualified_id, type);
8496 set_linkage_for_static_data_member (decl);
8497 /* Even if there is an in-class initialization, DECL
8498 is considered undefined until an out-of-class
8499 definition is provided. */
8500 DECL_EXTERNAL (decl) = 1;
8504 if (targetm.have_tls)
8505 DECL_TLS_MODEL (decl) = decl_default_tls_model (decl);
8507 /* A mere warning is sure to result in improper
8508 semantics at runtime. Don't bother to allow this to
8510 error ("thread-local storage not supported for this target");
8515 decl = build_decl (FIELD_DECL, unqualified_id, type);
8516 DECL_NONADDRESSABLE_P (decl) = bitfield;
8517 if (storage_class == sc_mutable)
8519 DECL_MUTABLE_P (decl) = 1;
8520 storage_class = sc_none;
8524 bad_specifiers (decl, "field", virtualp,
8525 memfn_quals != TYPE_UNQUALIFIED,
8526 inlinep, friendp, raises != NULL_TREE);
8529 else if (TREE_CODE (type) == FUNCTION_TYPE
8530 || TREE_CODE (type) == METHOD_TYPE)
8535 if (!unqualified_id)
8536 return error_mark_node;
8538 if (TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR)
8539 original_name = dname;
8541 original_name = unqualified_id;
8543 if (storage_class == sc_auto)
8544 error ("storage class %<auto%> invalid for function %qs", name);
8545 else if (storage_class == sc_register)
8546 error ("storage class %<register%> invalid for function %qs", name);
8548 error ("storage class %<__thread%> invalid for function %qs", name);
8550 /* Function declaration not at top level.
8551 Storage classes other than `extern' are not allowed
8552 and `extern' makes no difference. */
8553 if (! toplevel_bindings_p ()
8554 && (storage_class == sc_static
8555 || declspecs->specs[(int)ds_inline])
8558 if (storage_class == sc_static)
8559 pedwarn ("%<static%> specified invalid for function %qs "
8560 "declared out of global scope", name);
8562 pedwarn ("%<inline%> specifier invalid for function %qs "
8563 "declared out of global scope", name);
8566 if (ctype == NULL_TREE)
8570 error ("virtual non-class function %qs", name);
8574 else if (TREE_CODE (type) == FUNCTION_TYPE && staticp < 2
8575 && !NEW_DELETE_OPNAME_P (original_name))
8576 type = build_method_type_directly (ctype,
8578 TYPE_ARG_TYPES (type));
8580 /* Record presence of `static'. */
8581 publicp = (ctype != NULL_TREE
8582 || storage_class == sc_extern
8583 || storage_class != sc_static);
8585 decl = grokfndecl (ctype, type, original_name, parms, unqualified_id,
8586 virtualp, flags, memfn_quals, raises,
8588 publicp, inlinep, sfk, funcdef_flag,
8589 template_count, in_namespace, attrlist);
8590 if (decl == NULL_TREE)
8591 return error_mark_node;
8595 int invalid_static = 0;
8597 /* Don't allow a static member function in a class, and forbid
8598 declaring main to be static. */
8599 if (TREE_CODE (type) == METHOD_TYPE)
8601 pedwarn ("cannot declare member function %qD to have "
8602 "static linkage", decl);
8605 else if (current_function_decl)
8607 /* FIXME need arm citation */
8608 error ("cannot declare static function inside another function");
8615 storage_class = sc_none;
8621 /* It's a variable. */
8623 /* An uninitialized decl with `extern' is a reference. */
8624 decl = grokvardecl (type, unqualified_id,
8627 (type_quals & TYPE_QUAL_CONST) != 0,
8628 ctype ? ctype : in_namespace);
8629 bad_specifiers (decl, "variable", virtualp,
8630 memfn_quals != TYPE_UNQUALIFIED,
8631 inlinep, friendp, raises != NULL_TREE);
8635 DECL_CONTEXT (decl) = ctype;
8638 pedwarn ("%<static%> may not be used when defining "
8639 "(as opposed to declaring) a static data member");
8641 storage_class = sc_none;
8643 if (storage_class == sc_register && TREE_STATIC (decl))
8645 error ("static member %qD declared %<register%>", decl);
8646 storage_class = sc_none;
8648 if (storage_class == sc_extern && pedantic)
8650 pedwarn ("cannot explicitly declare member %q#D to have "
8653 storage_class = sc_none;
8658 /* Record `register' declaration for warnings on &
8659 and in case doing stupid register allocation. */
8661 if (storage_class == sc_register)
8662 DECL_REGISTER (decl) = 1;
8663 else if (storage_class == sc_extern)
8664 DECL_THIS_EXTERN (decl) = 1;
8665 else if (storage_class == sc_static)
8666 DECL_THIS_STATIC (decl) = 1;
8668 /* Record constancy and volatility. There's no need to do this
8669 when processing a template; we'll do this for the instantiated
8670 declaration based on the type of DECL. */
8671 if (!processing_template_decl)
8672 cp_apply_type_quals_to_decl (type_quals, decl);
8675 TREE_NO_WARNING (decl) = 1;
8681 /* Subroutine of start_function. Ensure that each of the parameter
8682 types (as listed in PARMS) is complete, as is required for a
8683 function definition. */
8686 require_complete_types_for_parms (tree parms)
8688 for (; parms; parms = TREE_CHAIN (parms))
8690 if (dependent_type_p (TREE_TYPE (parms)))
8692 if (!VOID_TYPE_P (TREE_TYPE (parms))
8693 && complete_type_or_else (TREE_TYPE (parms), parms))
8695 relayout_decl (parms);
8696 DECL_ARG_TYPE (parms) = type_passed_as (TREE_TYPE (parms));
8699 /* grokparms or complete_type_or_else will have already issued
8701 TREE_TYPE (parms) = error_mark_node;
8705 /* Returns nonzero if T is a local variable. */
8708 local_variable_p (tree t)
8710 if ((TREE_CODE (t) == VAR_DECL
8711 /* A VAR_DECL with a context that is a _TYPE is a static data
8713 && !TYPE_P (CP_DECL_CONTEXT (t))
8714 /* Any other non-local variable must be at namespace scope. */
8715 && !DECL_NAMESPACE_SCOPE_P (t))
8716 || (TREE_CODE (t) == PARM_DECL))
8722 /* Returns nonzero if T is an automatic local variable or a label.
8723 (These are the declarations that need to be remapped when the code
8724 containing them is duplicated.) */
8727 nonstatic_local_decl_p (tree t)
8729 return ((local_variable_p (t) && !TREE_STATIC (t))
8730 || TREE_CODE (t) == LABEL_DECL
8731 || TREE_CODE (t) == RESULT_DECL);
8734 /* Like local_variable_p, but suitable for use as a tree-walking
8738 local_variable_p_walkfn (tree *tp, int *walk_subtrees,
8739 void *data ATTRIBUTE_UNUSED)
8741 if (local_variable_p (*tp) && !DECL_ARTIFICIAL (*tp))
8743 else if (TYPE_P (*tp))
8750 /* Check that ARG, which is a default-argument expression for a
8751 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
8752 something goes wrong. DECL may also be a _TYPE node, rather than a
8753 DECL, if there is no DECL available. */
8756 check_default_argument (tree decl, tree arg)
8761 if (TREE_CODE (arg) == DEFAULT_ARG)
8762 /* We get a DEFAULT_ARG when looking at an in-class declaration
8763 with a default argument. Ignore the argument for now; we'll
8764 deal with it after the class is complete. */
8773 decl_type = TREE_TYPE (decl);
8775 if (arg == error_mark_node
8776 || decl == error_mark_node
8777 || TREE_TYPE (arg) == error_mark_node
8778 || decl_type == error_mark_node)
8779 /* Something already went wrong. There's no need to check
8781 return error_mark_node;
8783 /* [dcl.fct.default]
8785 A default argument expression is implicitly converted to the
8787 if (!TREE_TYPE (arg)
8788 || !can_convert_arg (decl_type, TREE_TYPE (arg), arg, LOOKUP_NORMAL))
8791 error ("default argument for %q#D has type %qT",
8792 decl, TREE_TYPE (arg));
8794 error ("default argument for parameter of type %qT has type %qT",
8795 decl_type, TREE_TYPE (arg));
8797 return error_mark_node;
8800 /* [dcl.fct.default]
8802 Local variables shall not be used in default argument
8805 The keyword `this' shall not be used in a default argument of a
8807 var = walk_tree_without_duplicates (&arg, local_variable_p_walkfn,
8811 error ("default argument %qE uses local variable %qD", arg, var);
8812 return error_mark_node;
8819 /* Decode the list of parameter types for a function type.
8820 Given the list of things declared inside the parens,
8821 return a list of types.
8823 If this parameter does not end with an ellipsis, we append
8826 *PARMS is set to the chain of PARM_DECLs created. */
8829 grokparms (cp_parameter_declarator *first_parm, tree *parms)
8831 tree result = NULL_TREE;
8832 tree decls = NULL_TREE;
8833 int ellipsis = !first_parm || first_parm->ellipsis_p;
8834 cp_parameter_declarator *parm;
8837 for (parm = first_parm; parm != NULL; parm = parm->next)
8839 tree type = NULL_TREE;
8840 tree init = parm->default_argument;
8844 if (parm == no_parameters)
8847 attrs = parm->decl_specifiers.attributes;
8848 parm->decl_specifiers.attributes = NULL_TREE;
8849 decl = grokdeclarator (parm->declarator, &parm->decl_specifiers,
8850 PARM, init != NULL_TREE, &attrs);
8851 if (! decl || TREE_TYPE (decl) == error_mark_node)
8855 cplus_decl_attributes (&decl, attrs, 0);
8857 type = TREE_TYPE (decl);
8858 if (VOID_TYPE_P (type))
8860 if (same_type_p (type, void_type_node)
8861 && DECL_SELF_REFERENCE_P (type)
8862 && !DECL_NAME (decl) && !result && !parm->next && !ellipsis)
8863 /* this is a parmlist of `(void)', which is ok. */
8865 cxx_incomplete_type_error (decl, type);
8866 /* It's not a good idea to actually create parameters of
8867 type `void'; other parts of the compiler assume that a
8868 void type terminates the parameter list. */
8869 type = error_mark_node;
8870 TREE_TYPE (decl) = error_mark_node;
8873 if (type != error_mark_node)
8875 /* Top-level qualifiers on the parameters are
8876 ignored for function types. */
8877 type = cp_build_qualified_type (type, 0);
8878 if (TREE_CODE (type) == METHOD_TYPE)
8880 error ("parameter %qD invalidly declared method type", decl);
8881 type = build_pointer_type (type);
8882 TREE_TYPE (decl) = type;
8884 else if (abstract_virtuals_error (decl, type))
8885 any_error = 1; /* Seems like a good idea. */
8886 else if (POINTER_TYPE_P (type))
8888 /* [dcl.fct]/6, parameter types cannot contain pointers
8889 (references) to arrays of unknown bound. */
8890 tree t = TREE_TYPE (type);
8891 int ptr = TYPE_PTR_P (type);
8897 else if (TREE_CODE (t) != ARRAY_TYPE)
8899 else if (!TYPE_DOMAIN (t))
8903 if (TREE_CODE (t) == ARRAY_TYPE)
8904 error ("parameter %qD includes %s to array of unknown "
8906 decl, ptr ? "pointer" : "reference", t);
8911 else if (init && !processing_template_decl)
8912 init = check_default_argument (decl, init);
8915 TREE_CHAIN (decl) = decls;
8917 result = tree_cons (init, type, result);
8919 decls = nreverse (decls);
8920 result = nreverse (result);
8922 result = chainon (result, void_list_node);
8929 /* D is a constructor or overloaded `operator='.
8931 Let T be the class in which D is declared. Then, this function
8934 -1 if D's is an ill-formed constructor or copy assignment operator
8935 whose first parameter is of type `T'.
8936 0 if D is not a copy constructor or copy assignment
8938 1 if D is a copy constructor or copy assignment operator whose
8939 first parameter is a reference to const qualified T.
8940 2 if D is a copy constructor or copy assignment operator whose
8941 first parameter is a reference to non-const qualified T.
8943 This function can be used as a predicate. Positive values indicate
8944 a copy constructor and nonzero values indicate a copy assignment
8954 gcc_assert (DECL_FUNCTION_MEMBER_P (d));
8956 if (TREE_CODE (d) == TEMPLATE_DECL
8957 || (DECL_TEMPLATE_INFO (d)
8958 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d))))
8959 /* Instantiations of template member functions are never copy
8960 functions. Note that member functions of templated classes are
8961 represented as template functions internally, and we must
8962 accept those as copy functions. */
8965 args = FUNCTION_FIRST_USER_PARMTYPE (d);
8969 arg_type = TREE_VALUE (args);
8970 if (arg_type == error_mark_node)
8973 if (TYPE_MAIN_VARIANT (arg_type) == DECL_CONTEXT (d))
8975 /* Pass by value copy assignment operator. */
8978 else if (TREE_CODE (arg_type) == REFERENCE_TYPE
8979 && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type)) == DECL_CONTEXT (d))
8981 if (CP_TYPE_CONST_P (TREE_TYPE (arg_type)))
8987 args = TREE_CHAIN (args);
8989 if (args && args != void_list_node && !TREE_PURPOSE (args))
8990 /* There are more non-optional args. */
8996 /* Remember any special properties of member function DECL. */
8998 void grok_special_member_properties (tree decl)
9002 if (!DECL_NONSTATIC_MEMBER_FUNCTION_P (decl))
9005 class_type = DECL_CONTEXT (decl);
9006 if (DECL_CONSTRUCTOR_P (decl))
9008 int ctor = copy_fn_p (decl);
9010 TYPE_HAS_CONSTRUCTOR (class_type) = 1;
9016 A non-template constructor for class X is a copy
9017 constructor if its first parameter is of type X&, const
9018 X&, volatile X& or const volatile X&, and either there
9019 are no other parameters or else all other parameters have
9020 default arguments. */
9021 TYPE_HAS_INIT_REF (class_type) = 1;
9023 TYPE_HAS_CONST_INIT_REF (class_type) = 1;
9025 else if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl)))
9026 TYPE_HAS_DEFAULT_CONSTRUCTOR (class_type) = 1;
9028 else if (DECL_OVERLOADED_OPERATOR_P (decl) == NOP_EXPR)
9032 A non-template assignment operator for class X is a copy
9033 assignment operator if its parameter is of type X, X&, const
9034 X&, volatile X& or const volatile X&. */
9036 int assop = copy_fn_p (decl);
9040 TYPE_HAS_ASSIGN_REF (class_type) = 1;
9042 TYPE_HAS_CONST_ASSIGN_REF (class_type) = 1;
9047 /* Check a constructor DECL has the correct form. Complains
9048 if the class has a constructor of the form X(X). */
9051 grok_ctor_properties (tree ctype, tree decl)
9053 int ctor_parm = copy_fn_p (decl);
9059 A declaration of a constructor for a class X is ill-formed if
9060 its first parameter is of type (optionally cv-qualified) X
9061 and either there are no other parameters or else all other
9062 parameters have default arguments.
9064 We *don't* complain about member template instantiations that
9065 have this form, though; they can occur as we try to decide
9066 what constructor to use during overload resolution. Since
9067 overload resolution will never prefer such a constructor to
9068 the non-template copy constructor (which is either explicitly
9069 or implicitly defined), there's no need to worry about their
9070 existence. Theoretically, they should never even be
9071 instantiated, but that's hard to forestall. */
9072 error ("invalid constructor; you probably meant %<%T (const %T&)%>",
9080 /* An operator with this code is unary, but can also be binary. */
9083 ambi_op_p (enum tree_code code)
9085 return (code == INDIRECT_REF
9086 || code == ADDR_EXPR
9087 || code == UNARY_PLUS_EXPR
9088 || code == NEGATE_EXPR
9089 || code == PREINCREMENT_EXPR
9090 || code == PREDECREMENT_EXPR);
9093 /* An operator with this name can only be unary. */
9096 unary_op_p (enum tree_code code)
9098 return (code == TRUTH_NOT_EXPR
9099 || code == BIT_NOT_EXPR
9100 || code == COMPONENT_REF
9101 || code == TYPE_EXPR);
9104 /* DECL is a declaration for an overloaded operator. If COMPLAIN is true,
9105 errors are issued for invalid declarations. */
9108 grok_op_properties (tree decl, bool complain)
9110 tree argtypes = TYPE_ARG_TYPES (TREE_TYPE (decl));
9112 int methodp = (TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE);
9113 tree name = DECL_NAME (decl);
9114 enum tree_code operator_code;
9119 /* Count the number of arguments and check for ellipsis. */
9120 for (argtype = argtypes, arity = 0;
9121 argtype && argtype != void_list_node;
9122 argtype = TREE_CHAIN (argtype))
9124 ellipsis_p = !argtype;
9126 class_type = DECL_CONTEXT (decl);
9127 if (class_type && !CLASS_TYPE_P (class_type))
9128 class_type = NULL_TREE;
9130 if (DECL_CONV_FN_P (decl))
9131 operator_code = TYPE_EXPR;
9135 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
9136 if (ansi_opname (CODE) == name) \
9138 operator_code = (CODE); \
9141 else if (ansi_assopname (CODE) == name) \
9143 operator_code = (CODE); \
9144 DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
9148 #include "operators.def"
9154 gcc_assert (operator_code != LAST_CPLUS_TREE_CODE);
9155 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
9158 switch (operator_code)
9161 TYPE_HAS_NEW_OPERATOR (class_type) = 1;
9165 TYPE_GETS_DELETE (class_type) |= 1;
9169 TYPE_HAS_ARRAY_NEW_OPERATOR (class_type) = 1;
9172 case VEC_DELETE_EXPR:
9173 TYPE_GETS_DELETE (class_type) |= 2;
9180 /* [basic.std.dynamic.allocation]/1:
9182 A program is ill-formed if an allocation function is declared
9183 in a namespace scope other than global scope or declared static
9186 The same also holds true for deallocation functions. */
9187 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR
9188 || operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
9190 if (DECL_NAMESPACE_SCOPE_P (decl))
9192 if (CP_DECL_CONTEXT (decl) != global_namespace)
9194 error ("%qD may not be declared within a namespace", decl);
9197 else if (!TREE_PUBLIC (decl))
9199 error ("%qD may not be declared as static", decl);
9205 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR)
9206 TREE_TYPE (decl) = coerce_new_type (TREE_TYPE (decl));
9207 else if (operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
9208 TREE_TYPE (decl) = coerce_delete_type (TREE_TYPE (decl));
9211 /* An operator function must either be a non-static member function
9212 or have at least one parameter of a class, a reference to a class,
9213 an enumeration, or a reference to an enumeration. 13.4.0.6 */
9214 if (! methodp || DECL_STATIC_FUNCTION_P (decl))
9216 if (operator_code == TYPE_EXPR
9217 || operator_code == CALL_EXPR
9218 || operator_code == COMPONENT_REF
9219 || operator_code == ARRAY_REF
9220 || operator_code == NOP_EXPR)
9222 error ("%qD must be a nonstatic member function", decl);
9229 if (DECL_STATIC_FUNCTION_P (decl))
9231 error ("%qD must be either a non-static member "
9232 "function or a non-member function", decl);
9236 for (p = argtypes; p && p != void_list_node; p = TREE_CHAIN (p))
9238 tree arg = non_reference (TREE_VALUE (p));
9239 if (arg == error_mark_node)
9242 /* IS_AGGR_TYPE, rather than CLASS_TYPE_P, is used
9243 because these checks are performed even on
9244 template functions. */
9245 if (IS_AGGR_TYPE (arg) || TREE_CODE (arg) == ENUMERAL_TYPE)
9249 if (!p || p == void_list_node)
9252 error ("%qD must have an argument of class or "
9253 "enumerated type", decl);
9259 /* There are no restrictions on the arguments to an overloaded
9261 if (operator_code == CALL_EXPR)
9264 /* Warn about conversion operators that will never be used. */
9265 if (IDENTIFIER_TYPENAME_P (name)
9266 && ! DECL_TEMPLATE_INFO (decl)
9268 /* Warn only declaring the function; there is no need to
9269 warn again about out-of-class definitions. */
9270 && class_type == current_class_type)
9272 tree t = TREE_TYPE (name);
9273 int ref = (TREE_CODE (t) == REFERENCE_TYPE);
9274 const char *what = 0;
9277 t = TYPE_MAIN_VARIANT (TREE_TYPE (t));
9279 if (TREE_CODE (t) == VOID_TYPE)
9281 else if (class_type)
9283 if (t == class_type)
9284 what = "the same type";
9285 /* Don't force t to be complete here. */
9286 else if (IS_AGGR_TYPE (t)
9287 && COMPLETE_TYPE_P (t)
9288 && DERIVED_FROM_P (t, class_type))
9289 what = "a base class";
9293 warning (OPT_Wconversion, "conversion to %s%s will never use a type "
9294 "conversion operator",
9295 ref ? "a reference to " : "", what);
9298 if (operator_code == COND_EXPR)
9301 error ("ISO C++ prohibits overloading operator ?:");
9304 else if (ellipsis_p)
9306 error ("%qD must not have variable number of arguments", decl);
9309 else if (ambi_op_p (operator_code))
9312 /* We pick the one-argument operator codes by default, so
9313 we don't have to change anything. */
9315 else if (arity == 2)
9317 /* If we thought this was a unary operator, we now know
9318 it to be a binary operator. */
9319 switch (operator_code)
9322 operator_code = MULT_EXPR;
9326 operator_code = BIT_AND_EXPR;
9329 case UNARY_PLUS_EXPR:
9330 operator_code = PLUS_EXPR;
9334 operator_code = MINUS_EXPR;
9337 case PREINCREMENT_EXPR:
9338 operator_code = POSTINCREMENT_EXPR;
9341 case PREDECREMENT_EXPR:
9342 operator_code = POSTDECREMENT_EXPR;
9349 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
9351 if ((operator_code == POSTINCREMENT_EXPR
9352 || operator_code == POSTDECREMENT_EXPR)
9353 && ! processing_template_decl
9354 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes)), integer_type_node))
9357 error ("postfix %qD must take %<int%> as its argument",
9360 error ("postfix %qD must take %<int%> as its second "
9368 error ("%qD must take either zero or one argument", decl);
9370 error ("%qD must take either one or two arguments", decl);
9374 /* More Effective C++ rule 6. */
9376 && (operator_code == POSTINCREMENT_EXPR
9377 || operator_code == POSTDECREMENT_EXPR
9378 || operator_code == PREINCREMENT_EXPR
9379 || operator_code == PREDECREMENT_EXPR))
9381 tree arg = TREE_VALUE (argtypes);
9382 tree ret = TREE_TYPE (TREE_TYPE (decl));
9383 if (methodp || TREE_CODE (arg) == REFERENCE_TYPE)
9384 arg = TREE_TYPE (arg);
9385 arg = TYPE_MAIN_VARIANT (arg);
9386 if (operator_code == PREINCREMENT_EXPR
9387 || operator_code == PREDECREMENT_EXPR)
9389 if (TREE_CODE (ret) != REFERENCE_TYPE
9390 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret)),
9392 warning (OPT_Weffc__, "prefix %qD should return %qT", decl,
9393 build_reference_type (arg));
9397 if (!same_type_p (TYPE_MAIN_VARIANT (ret), arg))
9398 warning (OPT_Weffc__, "postfix %qD should return %qT", decl, arg);
9402 else if (unary_op_p (operator_code))
9407 error ("%qD must take %<void%>", decl);
9409 error ("%qD must take exactly one argument", decl);
9413 else /* if (binary_op_p (operator_code)) */
9418 error ("%qD must take exactly one argument", decl);
9420 error ("%qD must take exactly two arguments", decl);
9424 /* More Effective C++ rule 7. */
9426 && (operator_code == TRUTH_ANDIF_EXPR
9427 || operator_code == TRUTH_ORIF_EXPR
9428 || operator_code == COMPOUND_EXPR))
9429 warning (OPT_Weffc__, "user-defined %qD always evaluates both arguments",
9433 /* Effective C++ rule 23. */
9436 && !DECL_ASSIGNMENT_OPERATOR_P (decl)
9437 && (operator_code == PLUS_EXPR
9438 || operator_code == MINUS_EXPR
9439 || operator_code == TRUNC_DIV_EXPR
9440 || operator_code == MULT_EXPR
9441 || operator_code == TRUNC_MOD_EXPR)
9442 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl))) == REFERENCE_TYPE)
9443 warning (OPT_Weffc__, "%qD should return by value", decl);
9446 for (; argtypes && argtypes != void_list_node;
9447 argtypes = TREE_CHAIN (argtypes))
9448 if (TREE_PURPOSE (argtypes))
9450 TREE_PURPOSE (argtypes) = NULL_TREE;
9451 if (operator_code == POSTINCREMENT_EXPR
9452 || operator_code == POSTDECREMENT_EXPR)
9455 pedwarn ("%qD cannot have default arguments", decl);
9459 error ("%qD cannot have default arguments", decl);
9467 /* Return a string giving the keyword associate with CODE. */
9470 tag_name (enum tag_types code)
9489 /* Name lookup in an elaborated-type-specifier (after the keyword
9490 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
9491 elaborated-type-specifier is invalid, issue a diagnostic and return
9492 error_mark_node; otherwise, return the *_TYPE to which it referred.
9493 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
9496 check_elaborated_type_specifier (enum tag_types tag_code,
9498 bool allow_template_p)
9504 struct S { struct S *p; };
9506 name lookup will find the TYPE_DECL for the implicit "S::S"
9507 typedef. Adjust for that here. */
9508 if (DECL_SELF_REFERENCE_P (decl))
9509 decl = TYPE_NAME (TREE_TYPE (decl));
9511 type = TREE_TYPE (decl);
9513 /* Check TEMPLATE_TYPE_PARM first because DECL_IMPLICIT_TYPEDEF_P
9514 is false for this case as well. */
9515 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
9517 error ("using template type parameter %qT after %qs",
9518 type, tag_name (tag_code));
9519 return error_mark_node;
9523 If the identifier resolves to a typedef-name or a template
9524 type-parameter, the elaborated-type-specifier is ill-formed.
9526 In other words, the only legitimate declaration to use in the
9527 elaborated type specifier is the implicit typedef created when
9528 the type is declared. */
9529 else if (!DECL_IMPLICIT_TYPEDEF_P (decl)
9530 && tag_code != typename_type)
9532 error ("using typedef-name %qD after %qs", decl, tag_name (tag_code));
9533 error ("%q+D has a previous declaration here", decl);
9534 return error_mark_node;
9536 else if (TREE_CODE (type) != RECORD_TYPE
9537 && TREE_CODE (type) != UNION_TYPE
9538 && tag_code != enum_type
9539 && tag_code != typename_type)
9541 error ("%qT referred to as %qs", type, tag_name (tag_code));
9542 error ("%q+T has a previous declaration here", type);
9543 return error_mark_node;
9545 else if (TREE_CODE (type) != ENUMERAL_TYPE
9546 && tag_code == enum_type)
9548 error ("%qT referred to as enum", type);
9549 error ("%q+T has a previous declaration here", type);
9550 return error_mark_node;
9552 else if (!allow_template_p
9553 && TREE_CODE (type) == RECORD_TYPE
9554 && CLASSTYPE_IS_TEMPLATE (type))
9556 /* If a class template appears as elaborated type specifier
9557 without a template header such as:
9559 template <class T> class C {};
9560 void f(class C); // No template header here
9562 then the required template argument is missing. */
9563 error ("template argument required for %<%s %T%>",
9564 tag_name (tag_code),
9565 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type)));
9566 return error_mark_node;
9572 /* Lookup NAME in elaborate type specifier in scope according to
9573 SCOPE and issue diagnostics if necessary.
9574 Return *_TYPE node upon success, NULL_TREE when the NAME is not
9575 found, and ERROR_MARK_NODE for type error. */
9578 lookup_and_check_tag (enum tag_types tag_code, tree name,
9579 tag_scope scope, bool template_header_p)
9583 if (scope == ts_global)
9585 /* First try ordinary name lookup, ignoring hidden class name
9586 injected via friend declaration. */
9587 decl = lookup_name_prefer_type (name, 2);
9588 /* If that fails, the name will be placed in the smallest
9589 non-class, non-function-prototype scope according to 3.3.1/5.
9590 We may already have a hidden name declared as friend in this
9591 scope. So lookup again but not ignoring hidden names.
9592 If we find one, that name will be made visible rather than
9593 creating a new tag. */
9595 decl = lookup_type_scope (name, ts_within_enclosing_non_class);
9598 decl = lookup_type_scope (name, scope);
9600 if (decl && DECL_CLASS_TEMPLATE_P (decl))
9601 decl = DECL_TEMPLATE_RESULT (decl);
9603 if (decl && TREE_CODE (decl) == TYPE_DECL)
9605 /* Look for invalid nested type:
9609 if (scope == ts_current && DECL_SELF_REFERENCE_P (decl))
9611 error ("%qD has the same name as the class in which it is "
9614 return error_mark_node;
9617 /* Two cases we need to consider when deciding if a class
9618 template is allowed as an elaborated type specifier:
9619 1. It is a self reference to its own class.
9620 2. It comes with a template header.
9624 template <class T> class C {
9625 class C *c1; // DECL_SELF_REFERENCE_P is true
9628 template <class U> class C; // template_header_p is true
9629 template <class T> class C<T>::D {
9630 class C *c2; // DECL_SELF_REFERENCE_P is true
9633 t = check_elaborated_type_specifier (tag_code,
9636 | DECL_SELF_REFERENCE_P (decl));
9643 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
9644 Define the tag as a forward-reference if it is not defined.
9646 If a declaration is given, process it here, and report an error if
9647 multiple declarations are not identical.
9649 SCOPE is TS_CURRENT when this is also a definition. Only look in
9650 the current frame for the name (since C++ allows new names in any
9651 scope.) It is TS_WITHIN_ENCLOSING_NON_CLASS if this is a friend
9652 declaration. Only look beginning from the current scope outward up
9653 till the nearest non-class scope. Otherwise it is TS_GLOBAL.
9655 TEMPLATE_HEADER_P is true when this declaration is preceded by
9656 a set of template parameters. */
9659 xref_tag (enum tag_types tag_code, tree name,
9660 tag_scope scope, bool template_header_p)
9662 enum tree_code code;
9664 tree context = NULL_TREE;
9666 timevar_push (TV_NAME_LOOKUP);
9668 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
9680 code = ENUMERAL_TYPE;
9686 /* In case of anonymous name, xref_tag is only called to
9687 make type node and push name. Name lookup is not required. */
9688 if (ANON_AGGRNAME_P (name))
9691 t = lookup_and_check_tag (tag_code, name,
9692 scope, template_header_p);
9694 if (t == error_mark_node)
9695 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
9697 if (scope != ts_current && t && current_class_type
9698 && template_class_depth (current_class_type)
9699 && template_header_p)
9701 /* Since SCOPE is not TS_CURRENT, we are not looking at a
9702 definition of this tag. Since, in addition, we are currently
9703 processing a (member) template declaration of a template
9704 class, we must be very careful; consider:
9711 { template <class V>
9712 friend struct S1; };
9714 Here, the S2::S1 declaration should not be confused with the
9715 outer declaration. In particular, the inner version should
9716 have a template parameter of level 2, not level 1. This
9717 would be particularly important if the member declaration
9720 template <class V = U> friend struct S1;
9722 say, when we should tsubst into `U' when instantiating
9723 S2. On the other hand, when presented with:
9733 we must find the inner binding eventually. We
9734 accomplish this by making sure that the new type we
9735 create to represent this declaration has the right
9737 context = TYPE_CONTEXT (t);
9743 /* If no such tag is yet defined, create a forward-reference node
9744 and record it as the "definition".
9745 When a real declaration of this type is found,
9746 the forward-reference will be altered into a real type. */
9747 if (code == ENUMERAL_TYPE)
9749 error ("use of enum %q#D without previous declaration", name);
9750 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
9754 t = make_aggr_type (code);
9755 TYPE_CONTEXT (t) = context;
9756 t = pushtag (name, t, scope);
9761 if (template_header_p && IS_AGGR_TYPE (t))
9763 if (!redeclare_class_template (t, current_template_parms))
9764 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
9766 else if (!processing_template_decl
9768 && CLASSTYPE_IS_TEMPLATE (t))
9770 error ("redeclaration of %qT as a non-template", t);
9771 error ("previous declaration %q+D", t);
9772 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
9775 /* Make injected friend class visible. */
9776 if (scope != ts_within_enclosing_non_class
9777 && hidden_name_p (TYPE_NAME (t)))
9779 DECL_ANTICIPATED (TYPE_NAME (t)) = 0;
9780 DECL_FRIEND_P (TYPE_NAME (t)) = 0;
9782 if (TYPE_TEMPLATE_INFO (t))
9784 DECL_ANTICIPATED (TYPE_TI_TEMPLATE (t)) = 0;
9785 DECL_FRIEND_P (TYPE_TI_TEMPLATE (t)) = 0;
9790 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, t);
9794 xref_tag_from_type (tree old, tree id, tag_scope scope)
9796 enum tag_types tag_kind;
9798 if (TREE_CODE (old) == RECORD_TYPE)
9799 tag_kind = (CLASSTYPE_DECLARED_CLASS (old) ? class_type : record_type);
9801 tag_kind = union_type;
9803 if (id == NULL_TREE)
9804 id = TYPE_IDENTIFIER (old);
9806 return xref_tag (tag_kind, id, scope, false);
9809 /* Create the binfo hierarchy for REF with (possibly NULL) base list
9810 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
9811 access_* node, and the TREE_VALUE is the type of the base-class.
9812 Non-NULL TREE_TYPE indicates virtual inheritance.
9814 Returns true if the binfo hierarchy was successfully created,
9815 false if an error was detected. */
9818 xref_basetypes (tree ref, tree base_list)
9821 tree binfo, base_binfo;
9822 unsigned max_vbases = 0; /* Maximum direct & indirect virtual bases. */
9823 unsigned max_bases = 0; /* Maximum direct bases. */
9825 tree default_access;
9826 tree igo_prev; /* Track Inheritance Graph Order. */
9828 if (ref == error_mark_node)
9831 /* The base of a derived class is private by default, all others are
9833 default_access = (TREE_CODE (ref) == RECORD_TYPE
9834 && CLASSTYPE_DECLARED_CLASS (ref)
9835 ? access_private_node : access_public_node);
9837 /* First, make sure that any templates in base-classes are
9838 instantiated. This ensures that if we call ourselves recursively
9839 we do not get confused about which classes are marked and which
9844 tree basetype = TREE_VALUE (*basep);
9846 if (!(processing_template_decl && uses_template_parms (basetype))
9847 && !complete_type_or_else (basetype, NULL))
9848 /* An incomplete type. Remove it from the list. */
9849 *basep = TREE_CHAIN (*basep);
9853 if (TREE_TYPE (*basep))
9855 if (CLASS_TYPE_P (basetype))
9856 max_vbases += VEC_length (tree, CLASSTYPE_VBASECLASSES (basetype));
9857 basep = &TREE_CHAIN (*basep);
9861 TYPE_MARKED_P (ref) = 1;
9863 /* The binfo slot should be empty, unless this is an (ill-formed)
9865 gcc_assert (!TYPE_BINFO (ref) || TYPE_SIZE (ref));
9866 gcc_assert (TYPE_MAIN_VARIANT (ref) == ref);
9868 binfo = make_tree_binfo (max_bases);
9870 TYPE_BINFO (ref) = binfo;
9871 BINFO_OFFSET (binfo) = size_zero_node;
9872 BINFO_TYPE (binfo) = ref;
9876 BINFO_BASE_ACCESSES (binfo) = VEC_alloc (tree, gc, max_bases);
9877 /* An aggregate cannot have baseclasses. */
9878 CLASSTYPE_NON_AGGREGATE (ref) = 1;
9880 if (TREE_CODE (ref) == UNION_TYPE)
9882 error ("derived union %qT invalid", ref);
9889 if (TYPE_FOR_JAVA (ref))
9891 error ("Java class %qT cannot have multiple bases", ref);
9898 CLASSTYPE_VBASECLASSES (ref) = VEC_alloc (tree, gc, max_vbases);
9900 if (TYPE_FOR_JAVA (ref))
9902 error ("Java class %qT cannot have virtual bases", ref);
9907 for (igo_prev = binfo; base_list; base_list = TREE_CHAIN (base_list))
9909 tree access = TREE_PURPOSE (base_list);
9910 int via_virtual = TREE_TYPE (base_list) != NULL_TREE;
9911 tree basetype = TREE_VALUE (base_list);
9913 if (access == access_default_node)
9914 access = default_access;
9916 if (TREE_CODE (basetype) == TYPE_DECL)
9917 basetype = TREE_TYPE (basetype);
9918 if (TREE_CODE (basetype) != RECORD_TYPE
9919 && TREE_CODE (basetype) != TYPENAME_TYPE
9920 && TREE_CODE (basetype) != TEMPLATE_TYPE_PARM
9921 && TREE_CODE (basetype) != BOUND_TEMPLATE_TEMPLATE_PARM)
9923 error ("base type %qT fails to be a struct or class type",
9928 if (TYPE_FOR_JAVA (basetype) && (current_lang_depth () == 0))
9929 TYPE_FOR_JAVA (ref) = 1;
9931 base_binfo = NULL_TREE;
9932 if (CLASS_TYPE_P (basetype) && !dependent_type_p (basetype))
9934 base_binfo = TYPE_BINFO (basetype);
9935 /* The original basetype could have been a typedef'd type. */
9936 basetype = BINFO_TYPE (base_binfo);
9938 /* Inherit flags from the base. */
9939 TYPE_HAS_NEW_OPERATOR (ref)
9940 |= TYPE_HAS_NEW_OPERATOR (basetype);
9941 TYPE_HAS_ARRAY_NEW_OPERATOR (ref)
9942 |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype);
9943 TYPE_GETS_DELETE (ref) |= TYPE_GETS_DELETE (basetype);
9944 TYPE_HAS_CONVERSION (ref) |= TYPE_HAS_CONVERSION (basetype);
9945 CLASSTYPE_DIAMOND_SHAPED_P (ref)
9946 |= CLASSTYPE_DIAMOND_SHAPED_P (basetype);
9947 CLASSTYPE_REPEATED_BASE_P (ref)
9948 |= CLASSTYPE_REPEATED_BASE_P (basetype);
9951 /* We must do this test after we've seen through a typedef
9953 if (TYPE_MARKED_P (basetype))
9955 if (basetype == ref)
9956 error ("recursive type %qT undefined", basetype);
9958 error ("duplicate base type %qT invalid", basetype);
9961 TYPE_MARKED_P (basetype) = 1;
9963 base_binfo = copy_binfo (base_binfo, basetype, ref,
9964 &igo_prev, via_virtual);
9965 if (!BINFO_INHERITANCE_CHAIN (base_binfo))
9966 BINFO_INHERITANCE_CHAIN (base_binfo) = binfo;
9968 BINFO_BASE_APPEND (binfo, base_binfo);
9969 BINFO_BASE_ACCESS_APPEND (binfo, access);
9972 if (VEC_space (tree, CLASSTYPE_VBASECLASSES (ref), 1))
9973 /* If we have space in the vbase vector, we must have shared at
9974 least one of them, and are therefore diamond shaped. */
9975 CLASSTYPE_DIAMOND_SHAPED_P (ref) = 1;
9977 /* Unmark all the types. */
9978 for (i = 0; BINFO_BASE_ITERATE (binfo, i, base_binfo); i++)
9979 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
9980 TYPE_MARKED_P (ref) = 0;
9982 /* Now see if we have a repeated base type. */
9983 if (!CLASSTYPE_REPEATED_BASE_P (ref))
9985 for (base_binfo = binfo; base_binfo;
9986 base_binfo = TREE_CHAIN (base_binfo))
9988 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
9990 CLASSTYPE_REPEATED_BASE_P (ref) = 1;
9993 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 1;
9995 for (base_binfo = binfo; base_binfo;
9996 base_binfo = TREE_CHAIN (base_binfo))
9997 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
9998 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
10007 /* Begin compiling the definition of an enumeration type.
10009 Returns the type object, as yet incomplete.
10010 Also records info about it so that build_enumerator
10011 may be used to declare the individual values as they are read. */
10014 start_enum (tree name)
10018 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
10020 /* If this is the real definition for a previous forward reference,
10021 fill in the contents in the same object that used to be the
10022 forward reference. */
10024 enumtype = lookup_and_check_tag (enum_type, name,
10025 /*tag_scope=*/ts_current,
10026 /*template_header_p=*/false);
10028 if (enumtype != NULL_TREE && TREE_CODE (enumtype) == ENUMERAL_TYPE)
10030 error ("multiple definition of %q#T", enumtype);
10031 error ("%Jprevious definition here", TYPE_MAIN_DECL (enumtype));
10032 /* Clear out TYPE_VALUES, and start again. */
10033 TYPE_VALUES (enumtype) = NULL_TREE;
10037 /* In case of error, make a dummy enum to allow parsing to
10039 if (enumtype == error_mark_node)
10040 name = make_anon_name ();
10042 enumtype = make_node (ENUMERAL_TYPE);
10043 enumtype = pushtag (name, enumtype, /*tag_scope=*/ts_current);
10049 /* After processing and defining all the values of an enumeration type,
10050 install their decls in the enumeration type and finish it off.
10051 ENUMTYPE is the type object and VALUES a list of name-value pairs. */
10054 finish_enum (tree enumtype)
10063 bool use_short_enum;
10067 integer_type_kind itk;
10068 tree underlying_type = NULL_TREE;
10070 /* We built up the VALUES in reverse order. */
10071 TYPE_VALUES (enumtype) = nreverse (TYPE_VALUES (enumtype));
10073 /* For an enum defined in a template, just set the type of the values;
10074 all further processing is postponed until the template is
10075 instantiated. We need to set the type so that tsubst of a CONST_DECL
10077 if (processing_template_decl)
10079 for (values = TYPE_VALUES (enumtype);
10081 values = TREE_CHAIN (values))
10082 TREE_TYPE (TREE_VALUE (values)) = enumtype;
10083 if (at_function_scope_p ())
10084 add_stmt (build_min (TAG_DEFN, enumtype));
10088 /* Determine the minimum and maximum values of the enumerators. */
10089 if (TYPE_VALUES (enumtype))
10091 minnode = maxnode = NULL_TREE;
10093 for (values = TYPE_VALUES (enumtype);
10095 values = TREE_CHAIN (values))
10097 decl = TREE_VALUE (values);
10099 /* [dcl.enum]: Following the closing brace of an enum-specifier,
10100 each enumerator has the type of its enumeration. Prior to the
10101 closing brace, the type of each enumerator is the type of its
10102 initializing value. */
10103 TREE_TYPE (decl) = enumtype;
10105 /* Update the minimum and maximum values, if appropriate. */
10106 value = DECL_INITIAL (decl);
10107 if (value == error_mark_node)
10108 value = integer_zero_node;
10109 /* Figure out what the minimum and maximum values of the
10110 enumerators are. */
10112 minnode = maxnode = value;
10113 else if (tree_int_cst_lt (maxnode, value))
10115 else if (tree_int_cst_lt (value, minnode))
10122 If the enumerator-list is empty, the underlying type is as if
10123 the enumeration had a single enumerator with value 0. */
10124 minnode = maxnode = integer_zero_node;
10126 /* Compute the number of bits require to represent all values of the
10127 enumeration. We must do this before the type of MINNODE and
10128 MAXNODE are transformed, since min_precision relies on the
10129 TREE_TYPE of the value it is passed. */
10130 unsignedp = tree_int_cst_sgn (minnode) >= 0;
10131 lowprec = min_precision (minnode, unsignedp);
10132 highprec = min_precision (maxnode, unsignedp);
10133 precision = MAX (lowprec, highprec);
10135 /* Determine the underlying type of the enumeration.
10139 The underlying type of an enumeration is an integral type that
10140 can represent all the enumerator values defined in the
10141 enumeration. It is implementation-defined which integral type is
10142 used as the underlying type for an enumeration except that the
10143 underlying type shall not be larger than int unless the value of
10144 an enumerator cannot fit in an int or unsigned int.
10146 We use "int" or an "unsigned int" as the underlying type, even if
10147 a smaller integral type would work, unless the user has
10148 explicitly requested that we use the smallest possible type. The
10149 user can request that for all enumerations with a command line
10150 flag, or for just one enumeration with an attribute. */
10152 use_short_enum = flag_short_enums
10153 || lookup_attribute ("packed", TYPE_ATTRIBUTES (enumtype));
10155 for (itk = (use_short_enum ? itk_char : itk_int);
10159 underlying_type = integer_types[itk];
10160 if (TYPE_PRECISION (underlying_type) >= precision
10161 && TYPE_UNSIGNED (underlying_type) == unsignedp)
10164 if (itk == itk_none)
10168 IF no integral type can represent all the enumerator values, the
10169 enumeration is ill-formed. */
10170 error ("no integral type can represent all of the enumerator values "
10171 "for %qT", enumtype);
10172 precision = TYPE_PRECISION (long_long_integer_type_node);
10173 underlying_type = integer_types[itk_unsigned_long_long];
10176 /* Compute the minium and maximum values for the type.
10180 For an enumeration where emin is the smallest enumerator and emax
10181 is the largest, the values of the enumeration are the values of the
10182 underlying type in the range bmin to bmax, where bmin and bmax are,
10183 respectively, the smallest and largest values of the smallest bit-
10184 field that can store emin and emax. */
10186 /* The middle-end currently assumes that types with TYPE_PRECISION
10187 narrower than their underlying type are suitably zero or sign
10188 extended to fill their mode. g++ doesn't make these guarantees.
10189 Until the middle-end can represent such paradoxical types, we
10190 set the TYPE_PRECISION to the width of the underlying type. */
10191 TYPE_PRECISION (enumtype) = TYPE_PRECISION (underlying_type);
10193 set_min_and_max_values_for_integral_type (enumtype, precision, unsignedp);
10197 The value of sizeof() applied to an enumeration type, an object
10198 of an enumeration type, or an enumerator, is the value of sizeof()
10199 applied to the underlying type. */
10200 TYPE_SIZE (enumtype) = TYPE_SIZE (underlying_type);
10201 TYPE_SIZE_UNIT (enumtype) = TYPE_SIZE_UNIT (underlying_type);
10202 TYPE_MODE (enumtype) = TYPE_MODE (underlying_type);
10203 TYPE_ALIGN (enumtype) = TYPE_ALIGN (underlying_type);
10204 TYPE_USER_ALIGN (enumtype) = TYPE_USER_ALIGN (underlying_type);
10205 TYPE_UNSIGNED (enumtype) = TYPE_UNSIGNED (underlying_type);
10207 /* Convert each of the enumerators to the type of the underlying
10208 type of the enumeration. */
10209 for (values = TYPE_VALUES (enumtype); values; values = TREE_CHAIN (values))
10211 location_t saved_location;
10213 decl = TREE_VALUE (values);
10214 saved_location = input_location;
10215 input_location = DECL_SOURCE_LOCATION (decl);
10216 value = perform_implicit_conversion (underlying_type,
10217 DECL_INITIAL (decl));
10218 input_location = saved_location;
10220 /* Do not clobber shared ints. */
10221 value = copy_node (value);
10223 TREE_TYPE (value) = enumtype;
10224 DECL_INITIAL (decl) = value;
10225 TREE_VALUE (values) = value;
10228 /* Fix up all variant types of this enum type. */
10229 for (t = TYPE_MAIN_VARIANT (enumtype); t; t = TYPE_NEXT_VARIANT (t))
10231 TYPE_VALUES (t) = TYPE_VALUES (enumtype);
10232 TYPE_MIN_VALUE (t) = TYPE_MIN_VALUE (enumtype);
10233 TYPE_MAX_VALUE (t) = TYPE_MAX_VALUE (enumtype);
10234 TYPE_SIZE (t) = TYPE_SIZE (enumtype);
10235 TYPE_SIZE_UNIT (t) = TYPE_SIZE_UNIT (enumtype);
10236 TYPE_MODE (t) = TYPE_MODE (enumtype);
10237 TYPE_PRECISION (t) = TYPE_PRECISION (enumtype);
10238 TYPE_ALIGN (t) = TYPE_ALIGN (enumtype);
10239 TYPE_USER_ALIGN (t) = TYPE_USER_ALIGN (enumtype);
10240 TYPE_UNSIGNED (t) = TYPE_UNSIGNED (enumtype);
10243 /* Finish debugging output for this type. */
10244 rest_of_type_compilation (enumtype, namespace_bindings_p ());
10247 /* Build and install a CONST_DECL for an enumeration constant of the
10248 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
10249 Assignment of sequential values by default is handled here. */
10252 build_enumerator (tree name, tree value, tree enumtype)
10258 /* If the VALUE was erroneous, pretend it wasn't there; that will
10259 result in the enum being assigned the next value in sequence. */
10260 if (value == error_mark_node)
10263 /* Remove no-op casts from the value. */
10265 STRIP_TYPE_NOPS (value);
10267 if (! processing_template_decl)
10269 /* Validate and default VALUE. */
10270 if (value != NULL_TREE)
10272 value = integral_constant_value (value);
10274 if (TREE_CODE (value) == INTEGER_CST)
10276 value = perform_integral_promotions (value);
10277 constant_expression_warning (value);
10281 error ("enumerator value for %qD is not an integer constant", name);
10286 /* Default based on previous value. */
10287 if (value == NULL_TREE)
10289 if (TYPE_VALUES (enumtype))
10292 unsigned HOST_WIDE_INT lo;
10296 /* The next value is the previous value plus one. We can
10297 safely assume that the previous value is an INTEGER_CST.
10298 add_double doesn't know the type of the target expression,
10299 so we must check with int_fits_type_p as well. */
10300 prev_value = DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype)));
10301 overflowed = add_double (TREE_INT_CST_LOW (prev_value),
10302 TREE_INT_CST_HIGH (prev_value),
10304 value = build_int_cst_wide (TREE_TYPE (prev_value), lo, hi);
10305 overflowed |= !int_fits_type_p (value, TREE_TYPE (prev_value));
10309 error ("overflow in enumeration values at %qD", name);
10310 value = error_mark_node;
10314 value = integer_zero_node;
10317 /* Remove no-op casts from the value. */
10318 STRIP_TYPE_NOPS (value);
10321 /* C++ associates enums with global, function, or class declarations. */
10322 context = current_scope ();
10324 /* Build the actual enumeration constant. Note that the enumeration
10325 constants have the type of their initializers until the
10326 enumeration is complete:
10330 Following the closing brace of an enum-specifier, each enumer-
10331 ator has the type of its enumeration. Prior to the closing
10332 brace, the type of each enumerator is the type of its
10333 initializing value.
10335 In finish_enum we will reset the type. Of course, if we're
10336 processing a template, there may be no value. */
10337 type = value ? TREE_TYPE (value) : NULL_TREE;
10339 if (context && context == current_class_type)
10340 /* This enum declaration is local to the class. We need the full
10341 lang_decl so that we can record DECL_CLASS_CONTEXT, for example. */
10342 decl = build_lang_decl (CONST_DECL, name, type);
10344 /* It's a global enum, or it's local to a function. (Note local to
10345 a function could mean local to a class method. */
10346 decl = build_decl (CONST_DECL, name, type);
10348 DECL_CONTEXT (decl) = FROB_CONTEXT (context);
10349 TREE_CONSTANT (decl) = 1;
10350 TREE_INVARIANT (decl) = 1;
10351 TREE_READONLY (decl) = 1;
10352 DECL_INITIAL (decl) = value;
10354 if (context && context == current_class_type)
10355 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
10356 on the TYPE_FIELDS list for `S'. (That's so that you can say
10357 things like `S::i' later.) */
10358 finish_member_declaration (decl);
10362 /* Add this enumeration constant to the list for this type. */
10363 TYPE_VALUES (enumtype) = tree_cons (name, decl, TYPE_VALUES (enumtype));
10367 /* We're defining DECL. Make sure that it's type is OK. */
10370 check_function_type (tree decl, tree current_function_parms)
10372 tree fntype = TREE_TYPE (decl);
10373 tree return_type = complete_type (TREE_TYPE (fntype));
10375 /* In a function definition, arg types must be complete. */
10376 require_complete_types_for_parms (current_function_parms);
10378 if (dependent_type_p (return_type))
10380 if (!COMPLETE_OR_VOID_TYPE_P (return_type))
10382 tree args = TYPE_ARG_TYPES (fntype);
10384 error ("return type %q#T is incomplete", return_type);
10386 /* Make it return void instead. */
10387 if (TREE_CODE (fntype) == METHOD_TYPE)
10388 fntype = build_method_type_directly (TREE_TYPE (TREE_VALUE (args)),
10390 TREE_CHAIN (args));
10392 fntype = build_function_type (void_type_node, args);
10394 = build_exception_variant (fntype,
10395 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (decl)));
10398 abstract_virtuals_error (decl, TREE_TYPE (fntype));
10401 /* Create the FUNCTION_DECL for a function definition.
10402 DECLSPECS and DECLARATOR are the parts of the declaration;
10403 they describe the function's name and the type it returns,
10404 but twisted together in a fashion that parallels the syntax of C.
10406 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
10407 DECLARATOR is really the DECL for the function we are about to
10408 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
10409 indicating that the function is an inline defined in-class.
10411 This function creates a binding context for the function body
10412 as well as setting up the FUNCTION_DECL in current_function_decl.
10414 For C++, we must first check whether that datum makes any sense.
10415 For example, "class A local_a(1,2);" means that variable local_a
10416 is an aggregate of type A, which should have a constructor
10417 applied to it with the argument list [1, 2].
10419 On entry, DECL_INITIAL (decl1) should be NULL_TREE or error_mark_node,
10420 or may be a BLOCK if the function has been defined previously
10421 in this translation unit. On exit, DECL_INITIAL (decl1) will be
10422 error_mark_node if the function has never been defined, or
10423 a BLOCK if the function has been defined somewhere. */
10426 start_preparsed_function (tree decl1, tree attrs, int flags)
10428 tree ctype = NULL_TREE;
10431 int doing_friend = 0;
10432 struct cp_binding_level *bl;
10433 tree current_function_parms;
10434 struct c_fileinfo *finfo
10435 = get_fileinfo (LOCATION_FILE (DECL_SOURCE_LOCATION (decl1)));
10436 bool honor_interface;
10438 /* Sanity check. */
10439 gcc_assert (TREE_CODE (TREE_VALUE (void_list_node)) == VOID_TYPE);
10440 gcc_assert (TREE_CHAIN (void_list_node) == NULL_TREE);
10442 fntype = TREE_TYPE (decl1);
10443 if (TREE_CODE (fntype) == METHOD_TYPE)
10444 ctype = TYPE_METHOD_BASETYPE (fntype);
10446 /* ISO C++ 11.4/5. A friend function defined in a class is in
10447 the (lexical) scope of the class in which it is defined. */
10448 if (!ctype && DECL_FRIEND_P (decl1))
10450 ctype = DECL_FRIEND_CONTEXT (decl1);
10452 /* CTYPE could be null here if we're dealing with a template;
10453 for example, `inline friend float foo()' inside a template
10454 will have no CTYPE set. */
10455 if (ctype && TREE_CODE (ctype) != RECORD_TYPE)
10461 if (DECL_DECLARED_INLINE_P (decl1)
10462 && lookup_attribute ("noinline", attrs))
10463 warning (0, "inline function %q+D given attribute noinline", decl1);
10465 if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1))
10466 /* This is a constructor, we must ensure that any default args
10467 introduced by this definition are propagated to the clones
10468 now. The clones are used directly in overload resolution. */
10469 adjust_clone_args (decl1);
10471 /* Sometimes we don't notice that a function is a static member, and
10472 build a METHOD_TYPE for it. Fix that up now. */
10473 if (ctype != NULL_TREE && DECL_STATIC_FUNCTION_P (decl1)
10474 && TREE_CODE (TREE_TYPE (decl1)) == METHOD_TYPE)
10476 revert_static_member_fn (decl1);
10480 /* Set up current_class_type, and enter the scope of the class, if
10483 push_nested_class (ctype);
10484 else if (DECL_STATIC_FUNCTION_P (decl1))
10485 push_nested_class (DECL_CONTEXT (decl1));
10487 /* Now that we have entered the scope of the class, we must restore
10488 the bindings for any template parameters surrounding DECL1, if it
10489 is an inline member template. (Order is important; consider the
10490 case where a template parameter has the same name as a field of
10491 the class.) It is not until after this point that
10492 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
10493 if (flags & SF_INCLASS_INLINE)
10494 maybe_begin_member_template_processing (decl1);
10496 /* Effective C++ rule 15. */
10498 && DECL_OVERLOADED_OPERATOR_P (decl1) == NOP_EXPR
10499 && TREE_CODE (TREE_TYPE (fntype)) == VOID_TYPE)
10500 warning (OPT_Weffc__, "%<operator=%> should return a reference to %<*this%>");
10502 /* Make the init_value nonzero so pushdecl knows this is not tentative.
10503 error_mark_node is replaced below (in poplevel) with the BLOCK. */
10504 if (!DECL_INITIAL (decl1))
10505 DECL_INITIAL (decl1) = error_mark_node;
10507 /* This function exists in static storage.
10508 (This does not mean `static' in the C sense!) */
10509 TREE_STATIC (decl1) = 1;
10511 /* We must call push_template_decl after current_class_type is set
10512 up. (If we are processing inline definitions after exiting a
10513 class scope, current_class_type will be NULL_TREE until set above
10514 by push_nested_class.) */
10515 if (processing_template_decl)
10517 /* FIXME: Handle error_mark_node more gracefully. */
10518 tree newdecl1 = push_template_decl (decl1);
10519 if (newdecl1 != error_mark_node)
10523 /* We are now in the scope of the function being defined. */
10524 current_function_decl = decl1;
10526 /* Save the parm names or decls from this function's declarator
10527 where store_parm_decls will find them. */
10528 current_function_parms = DECL_ARGUMENTS (decl1);
10530 /* Make sure the parameter and return types are reasonable. When
10531 you declare a function, these types can be incomplete, but they
10532 must be complete when you define the function. */
10533 check_function_type (decl1, current_function_parms);
10535 /* Build the return declaration for the function. */
10536 restype = TREE_TYPE (fntype);
10537 /* Promote the value to int before returning it. */
10538 if (c_promoting_integer_type_p (restype))
10539 restype = type_promotes_to (restype);
10540 if (DECL_RESULT (decl1) == NULL_TREE)
10544 resdecl = build_decl (RESULT_DECL, 0, TYPE_MAIN_VARIANT (restype));
10545 DECL_ARTIFICIAL (resdecl) = 1;
10546 DECL_IGNORED_P (resdecl) = 1;
10547 DECL_RESULT (decl1) = resdecl;
10549 cp_apply_type_quals_to_decl (cp_type_quals (restype), resdecl);
10552 /* Let the user know we're compiling this function. */
10553 announce_function (decl1);
10555 /* Record the decl so that the function name is defined.
10556 If we already have a decl for this name, and it is a FUNCTION_DECL,
10557 use the old decl. */
10558 if (!processing_template_decl && !(flags & SF_PRE_PARSED))
10560 /* A specialization is not used to guide overload resolution. */
10561 if (!DECL_FUNCTION_MEMBER_P (decl1)
10562 && !(DECL_USE_TEMPLATE (decl1) &&
10563 PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl1))))
10565 tree olddecl = pushdecl (decl1);
10567 if (olddecl == error_mark_node)
10568 /* If something went wrong when registering the declaration,
10569 use DECL1; we have to have a FUNCTION_DECL to use when
10570 parsing the body of the function. */
10574 /* Otherwise, OLDDECL is either a previous declaration
10575 of the same function or DECL1 itself. */
10577 if (warn_missing_declarations
10578 && olddecl == decl1
10579 && !DECL_MAIN_P (decl1)
10580 && TREE_PUBLIC (decl1)
10581 && !DECL_DECLARED_INLINE_P (decl1))
10585 /* Check whether DECL1 is in an anonymous
10587 for (context = DECL_CONTEXT (decl1);
10589 context = DECL_CONTEXT (context))
10591 if (TREE_CODE (context) == NAMESPACE_DECL
10592 && DECL_NAME (context) == NULL_TREE)
10596 if (context == NULL)
10597 warning (OPT_Wmissing_declarations,
10598 "no previous declaration for %q+D", decl1);
10606 /* We need to set the DECL_CONTEXT. */
10607 if (!DECL_CONTEXT (decl1) && DECL_TEMPLATE_INFO (decl1))
10608 DECL_CONTEXT (decl1) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1));
10610 fntype = TREE_TYPE (decl1);
10612 /* If #pragma weak applies, mark the decl appropriately now.
10613 The pragma only applies to global functions. Because
10614 determining whether or not the #pragma applies involves
10615 computing the mangled name for the declaration, we cannot
10616 apply the pragma until after we have merged this declaration
10617 with any previous declarations; if the original declaration
10618 has a linkage specification, that specification applies to
10619 the definition as well, and may affect the mangled name. */
10620 if (!DECL_CONTEXT (decl1))
10621 maybe_apply_pragma_weak (decl1);
10624 /* Reset this in case the call to pushdecl changed it. */
10625 current_function_decl = decl1;
10627 gcc_assert (DECL_INITIAL (decl1));
10629 /* This function may already have been parsed, in which case just
10630 return; our caller will skip over the body without parsing. */
10631 if (DECL_INITIAL (decl1) != error_mark_node)
10634 /* Initialize RTL machinery. We cannot do this until
10635 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
10636 even when processing a template; this is how we get
10637 CFUN set up, and our per-function variables initialized.
10638 FIXME factor out the non-RTL stuff. */
10639 bl = current_binding_level;
10640 allocate_struct_function (decl1);
10641 current_binding_level = bl;
10643 /* Even though we're inside a function body, we still don't want to
10644 call expand_expr to calculate the size of a variable-sized array.
10645 We haven't necessarily assigned RTL to all variables yet, so it's
10646 not safe to try to expand expressions involving them. */
10647 cfun->x_dont_save_pending_sizes_p = 1;
10649 /* Start the statement-tree, start the tree now. */
10650 DECL_SAVED_TREE (decl1) = push_stmt_list ();
10652 /* If we are (erroneously) defining a function that we have already
10653 defined before, wipe out what we knew before. */
10654 if (!DECL_PENDING_INLINE_P (decl1))
10655 DECL_SAVED_FUNCTION_DATA (decl1) = NULL;
10657 if (ctype && !doing_friend && !DECL_STATIC_FUNCTION_P (decl1))
10659 /* We know that this was set up by `grokclassfn'. We do not
10660 wait until `store_parm_decls', since evil parse errors may
10661 never get us to that point. Here we keep the consistency
10662 between `current_class_type' and `current_class_ptr'. */
10663 tree t = DECL_ARGUMENTS (decl1);
10665 gcc_assert (t != NULL_TREE && TREE_CODE (t) == PARM_DECL);
10666 gcc_assert (TREE_CODE (TREE_TYPE (t)) == POINTER_TYPE);
10668 cp_function_chain->x_current_class_ref
10669 = build_indirect_ref (t, NULL);
10670 cp_function_chain->x_current_class_ptr = t;
10672 /* Constructors and destructors need to know whether they're "in
10673 charge" of initializing virtual base classes. */
10674 t = TREE_CHAIN (t);
10675 if (DECL_HAS_IN_CHARGE_PARM_P (decl1))
10677 current_in_charge_parm = t;
10678 t = TREE_CHAIN (t);
10680 if (DECL_HAS_VTT_PARM_P (decl1))
10682 gcc_assert (DECL_NAME (t) == vtt_parm_identifier);
10683 current_vtt_parm = t;
10687 honor_interface = (!DECL_TEMPLATE_INSTANTIATION (decl1)
10688 /* Implicitly-defined methods (like the
10689 destructor for a class in which no destructor
10690 is explicitly declared) must not be defined
10691 until their definition is needed. So, we
10692 ignore interface specifications for
10693 compiler-generated functions. */
10694 && !DECL_ARTIFICIAL (decl1));
10696 if (DECL_INTERFACE_KNOWN (decl1))
10698 tree ctx = decl_function_context (decl1);
10700 if (DECL_NOT_REALLY_EXTERN (decl1))
10701 DECL_EXTERNAL (decl1) = 0;
10703 if (ctx != NULL_TREE && DECL_DECLARED_INLINE_P (ctx)
10704 && TREE_PUBLIC (ctx))
10705 /* This is a function in a local class in an extern inline
10707 comdat_linkage (decl1);
10709 /* If this function belongs to an interface, it is public.
10710 If it belongs to someone else's interface, it is also external.
10711 This only affects inlines and template instantiations. */
10712 else if (!finfo->interface_unknown && honor_interface)
10714 if (DECL_DECLARED_INLINE_P (decl1)
10715 || DECL_TEMPLATE_INSTANTIATION (decl1)
10716 || processing_template_decl)
10718 DECL_EXTERNAL (decl1)
10719 = (finfo->interface_only
10720 || (DECL_DECLARED_INLINE_P (decl1)
10721 && ! flag_implement_inlines
10722 && !DECL_VINDEX (decl1)));
10724 /* For WIN32 we also want to put these in linkonce sections. */
10725 maybe_make_one_only (decl1);
10728 DECL_EXTERNAL (decl1) = 0;
10729 DECL_INTERFACE_KNOWN (decl1) = 1;
10730 /* If this function is in an interface implemented in this file,
10731 make sure that the backend knows to emit this function
10733 if (!DECL_EXTERNAL (decl1))
10734 mark_needed (decl1);
10736 else if (finfo->interface_unknown && finfo->interface_only
10737 && honor_interface)
10739 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
10740 interface, we will have both finfo->interface_unknown and
10741 finfo->interface_only set. In that case, we don't want to
10742 use the normal heuristics because someone will supply a
10743 #pragma implementation elsewhere, and deducing it here would
10744 produce a conflict. */
10745 comdat_linkage (decl1);
10746 DECL_EXTERNAL (decl1) = 0;
10747 DECL_INTERFACE_KNOWN (decl1) = 1;
10748 DECL_DEFER_OUTPUT (decl1) = 1;
10752 /* This is a definition, not a reference.
10753 So clear DECL_EXTERNAL. */
10754 DECL_EXTERNAL (decl1) = 0;
10756 if ((DECL_DECLARED_INLINE_P (decl1)
10757 || DECL_TEMPLATE_INSTANTIATION (decl1))
10758 && ! DECL_INTERFACE_KNOWN (decl1)
10759 /* Don't try to defer nested functions for now. */
10760 && ! decl_function_context (decl1))
10761 DECL_DEFER_OUTPUT (decl1) = 1;
10763 DECL_INTERFACE_KNOWN (decl1) = 1;
10766 /* Determine the ELF visibility attribute for the function. We must not
10767 do this before calling "pushdecl", as we must allow "duplicate_decls"
10768 to merge any attributes appropriately. We also need to wait until
10770 if (!DECL_CLONED_FUNCTION_P (decl1))
10771 determine_visibility (decl1);
10773 begin_scope (sk_function_parms, decl1);
10777 if (DECL_DESTRUCTOR_P (decl1)
10778 || (DECL_CONSTRUCTOR_P (decl1)
10779 && targetm.cxx.cdtor_returns_this ()))
10781 cdtor_label = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
10782 DECL_CONTEXT (cdtor_label) = current_function_decl;
10785 start_fname_decls ();
10787 store_parm_decls (current_function_parms);
10791 /* Like start_preparsed_function, except that instead of a
10792 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
10794 Returns 1 on success. If the DECLARATOR is not suitable for a function
10795 (it defines a datum instead), we return 0, which tells
10796 yyparse to report a parse error. */
10799 start_function (cp_decl_specifier_seq *declspecs,
10800 const cp_declarator *declarator,
10805 decl1 = grokdeclarator (declarator, declspecs, FUNCDEF, 1, &attrs);
10806 /* If the declarator is not suitable for a function definition,
10807 cause a syntax error. */
10808 if (decl1 == NULL_TREE || TREE_CODE (decl1) != FUNCTION_DECL)
10811 if (DECL_MAIN_P (decl1))
10812 /* main must return int. grokfndecl should have corrected it
10813 (and issued a diagnostic) if the user got it wrong. */
10814 gcc_assert (same_type_p (TREE_TYPE (TREE_TYPE (decl1)),
10815 integer_type_node));
10817 start_preparsed_function (decl1, attrs, /*flags=*/SF_DEFAULT);
10822 /* Returns true iff an EH_SPEC_BLOCK should be created in the body of
10826 use_eh_spec_block (tree fn)
10828 return (flag_exceptions && flag_enforce_eh_specs
10829 && !processing_template_decl
10830 && TYPE_RAISES_EXCEPTIONS (TREE_TYPE (fn))
10831 /* We insert the EH_SPEC_BLOCK only in the original
10832 function; then, it is copied automatically to the
10834 && !DECL_CLONED_FUNCTION_P (fn)
10835 /* Implicitly-generated constructors and destructors have
10836 exception specifications. However, those specifications
10837 are the union of the possible exceptions specified by the
10838 constructors/destructors for bases and members, so no
10839 unallowed exception will ever reach this function. By
10840 not creating the EH_SPEC_BLOCK we save a little memory,
10841 and we avoid spurious warnings about unreachable
10843 && !DECL_ARTIFICIAL (fn));
10846 /* Store the parameter declarations into the current function declaration.
10847 This is called after parsing the parameter declarations, before
10848 digesting the body of the function.
10850 Also install to binding contour return value identifier, if any. */
10853 store_parm_decls (tree current_function_parms)
10855 tree fndecl = current_function_decl;
10858 /* This is a chain of any other decls that came in among the parm
10859 declarations. If a parm is declared with enum {foo, bar} x;
10860 then CONST_DECLs for foo and bar are put here. */
10861 tree nonparms = NULL_TREE;
10863 if (current_function_parms)
10865 /* This case is when the function was defined with an ANSI prototype.
10866 The parms already have decls, so we need not do anything here
10867 except record them as in effect
10868 and complain if any redundant old-style parm decls were written. */
10870 tree specparms = current_function_parms;
10873 /* Must clear this because it might contain TYPE_DECLs declared
10875 current_binding_level->names = NULL;
10877 /* If we're doing semantic analysis, then we'll call pushdecl
10878 for each of these. We must do them in reverse order so that
10879 they end in the correct forward order. */
10880 specparms = nreverse (specparms);
10882 for (parm = specparms; parm; parm = next)
10884 next = TREE_CHAIN (parm);
10885 if (TREE_CODE (parm) == PARM_DECL)
10887 if (DECL_NAME (parm) == NULL_TREE
10888 || TREE_CODE (parm) != VOID_TYPE)
10891 error ("parameter %qD declared void", parm);
10895 /* If we find an enum constant or a type tag,
10896 put it aside for the moment. */
10897 TREE_CHAIN (parm) = NULL_TREE;
10898 nonparms = chainon (nonparms, parm);
10902 /* Get the decls in their original chain order and record in the
10903 function. This is all and only the PARM_DECLs that were
10904 pushed into scope by the loop above. */
10905 DECL_ARGUMENTS (fndecl) = getdecls ();
10908 DECL_ARGUMENTS (fndecl) = NULL_TREE;
10910 /* Now store the final chain of decls for the arguments
10911 as the decl-chain of the current lexical scope.
10912 Put the enumerators in as well, at the front so that
10913 DECL_ARGUMENTS is not modified. */
10914 current_binding_level->names = chainon (nonparms, DECL_ARGUMENTS (fndecl));
10916 if (use_eh_spec_block (current_function_decl))
10917 current_eh_spec_block = begin_eh_spec_block ();
10921 /* We have finished doing semantic analysis on DECL, but have not yet
10922 generated RTL for its body. Save away our current state, so that
10923 when we want to generate RTL later we know what to do. */
10926 save_function_data (tree decl)
10928 struct language_function *f;
10930 /* Save the language-specific per-function data so that we can
10931 get it back when we really expand this function. */
10932 gcc_assert (!DECL_PENDING_INLINE_P (decl));
10935 f = GGC_NEW (struct language_function);
10936 memcpy (f, cp_function_chain, sizeof (struct language_function));
10937 DECL_SAVED_FUNCTION_DATA (decl) = f;
10939 /* Clear out the bits we don't need. */
10940 f->base.x_stmt_tree.x_cur_stmt_list = NULL_TREE;
10941 f->bindings = NULL;
10942 f->x_local_names = NULL;
10946 /* Set the return value of the constructor (if present). */
10949 finish_constructor_body (void)
10954 if (targetm.cxx.cdtor_returns_this ())
10956 /* Any return from a constructor will end up here. */
10957 add_stmt (build_stmt (LABEL_EXPR, cdtor_label));
10959 val = DECL_ARGUMENTS (current_function_decl);
10960 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
10961 DECL_RESULT (current_function_decl), val);
10962 /* Return the address of the object. */
10963 exprstmt = build_stmt (RETURN_EXPR, val);
10964 add_stmt (exprstmt);
10968 /* Do all the processing for the beginning of a destructor; set up the
10969 vtable pointers and cleanups for bases and members. */
10972 begin_destructor_body (void)
10974 tree compound_stmt;
10976 /* If the CURRENT_CLASS_TYPE is incomplete, we will have already
10977 issued an error message. We still want to try to process the
10978 body of the function, but initialize_vtbl_ptrs will crash if
10979 TYPE_BINFO is NULL. */
10980 if (COMPLETE_TYPE_P (current_class_type))
10982 compound_stmt = begin_compound_stmt (0);
10983 /* Make all virtual function table pointers in non-virtual base
10984 classes point to CURRENT_CLASS_TYPE's virtual function
10986 initialize_vtbl_ptrs (current_class_ptr);
10987 finish_compound_stmt (compound_stmt);
10989 /* And insert cleanups for our bases and members so that they
10990 will be properly destroyed if we throw. */
10991 push_base_cleanups ();
10995 /* At the end of every destructor we generate code to delete the object if
10996 necessary. Do that now. */
10999 finish_destructor_body (void)
11003 /* Any return from a destructor will end up here; that way all base
11004 and member cleanups will be run when the function returns. */
11005 add_stmt (build_stmt (LABEL_EXPR, cdtor_label));
11007 /* In a virtual destructor, we must call delete. */
11008 if (DECL_VIRTUAL_P (current_function_decl))
11011 tree virtual_size = cxx_sizeof (current_class_type);
11015 At the point of definition of a virtual destructor (including
11016 an implicit definition), non-placement operator delete shall
11017 be looked up in the scope of the destructor's class and if
11018 found shall be accessible and unambiguous. */
11019 exprstmt = build_op_delete_call(DELETE_EXPR, current_class_ptr,
11021 /*global_p=*/false,
11022 /*placement=*/NULL_TREE,
11023 /*alloc_fn=*/NULL_TREE);
11025 if_stmt = begin_if_stmt ();
11026 finish_if_stmt_cond (build2 (BIT_AND_EXPR, integer_type_node,
11027 current_in_charge_parm,
11030 finish_expr_stmt (exprstmt);
11031 finish_then_clause (if_stmt);
11032 finish_if_stmt (if_stmt);
11035 if (targetm.cxx.cdtor_returns_this ())
11039 val = DECL_ARGUMENTS (current_function_decl);
11040 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
11041 DECL_RESULT (current_function_decl), val);
11042 /* Return the address of the object. */
11043 exprstmt = build_stmt (RETURN_EXPR, val);
11044 add_stmt (exprstmt);
11048 /* Do the necessary processing for the beginning of a function body, which
11049 in this case includes member-initializers, but not the catch clauses of
11050 a function-try-block. Currently, this means opening a binding level
11051 for the member-initializers (in a ctor) and member cleanups (in a dtor). */
11054 begin_function_body (void)
11058 if (! FUNCTION_NEEDS_BODY_BLOCK (current_function_decl))
11061 if (processing_template_decl)
11062 /* Do nothing now. */;
11064 /* Always keep the BLOCK node associated with the outermost pair of
11065 curly braces of a function. These are needed for correct
11066 operation of dwarfout.c. */
11067 keep_next_level (true);
11069 stmt = begin_compound_stmt (BCS_FN_BODY);
11071 if (processing_template_decl)
11072 /* Do nothing now. */;
11073 else if (DECL_DESTRUCTOR_P (current_function_decl))
11074 begin_destructor_body ();
11079 /* Do the processing for the end of a function body. Currently, this means
11080 closing out the cleanups for fully-constructed bases and members, and in
11081 the case of the destructor, deleting the object if desired. Again, this
11082 is only meaningful for [cd]tors, since they are the only functions where
11083 there is a significant distinction between the main body and any
11084 function catch clauses. Handling, say, main() return semantics here
11085 would be wrong, as flowing off the end of a function catch clause for
11086 main() would also need to return 0. */
11089 finish_function_body (tree compstmt)
11091 if (compstmt == NULL_TREE)
11094 /* Close the block. */
11095 finish_compound_stmt (compstmt);
11097 if (processing_template_decl)
11098 /* Do nothing now. */;
11099 else if (DECL_CONSTRUCTOR_P (current_function_decl))
11100 finish_constructor_body ();
11101 else if (DECL_DESTRUCTOR_P (current_function_decl))
11102 finish_destructor_body ();
11105 /* Given a function, returns the BLOCK corresponding to the outermost level
11106 of curly braces, skipping the artificial block created for constructor
11110 outer_curly_brace_block (tree fndecl)
11112 tree block = BLOCK_SUBBLOCKS (DECL_INITIAL (fndecl));
11113 if (FUNCTION_NEEDS_BODY_BLOCK (current_function_decl))
11114 /* Skip the artificial function body block. */
11115 block = BLOCK_SUBBLOCKS (block);
11119 /* Finish up a function declaration and compile that function
11120 all the way to assembler language output. The free the storage
11121 for the function definition.
11123 FLAGS is a bitwise or of the following values:
11125 We just finished processing the body of an in-class inline
11126 function definition. (This processing will have taken place
11127 after the class definition is complete.) */
11130 finish_function (int flags)
11132 tree fndecl = current_function_decl;
11133 tree fntype, ctype = NULL_TREE;
11134 int inclass_inline = (flags & 2) != 0;
11137 /* When we get some parse errors, we can end up without a
11138 current_function_decl, so cope. */
11139 if (fndecl == NULL_TREE)
11140 return error_mark_node;
11142 if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fndecl)
11143 && DECL_VIRTUAL_P (fndecl)
11144 && !processing_template_decl)
11146 tree fnclass = DECL_CONTEXT (fndecl);
11147 if (fndecl == CLASSTYPE_KEY_METHOD (fnclass))
11148 keyed_classes = tree_cons (NULL_TREE, fnclass, keyed_classes);
11151 nested = function_depth > 1;
11152 fntype = TREE_TYPE (fndecl);
11154 /* TREE_READONLY (fndecl) = 1;
11155 This caused &foo to be of type ptr-to-const-function
11156 which then got a warning when stored in a ptr-to-function variable. */
11158 gcc_assert (building_stmt_tree ());
11159 /* The current function is being defined, so its DECL_INITIAL should
11160 be set, and unless there's a multiple definition, it should be
11161 error_mark_node. */
11162 gcc_assert (DECL_INITIAL (fndecl) == error_mark_node);
11164 /* For a cloned function, we've already got all the code we need;
11165 there's no need to add any extra bits. */
11166 if (!DECL_CLONED_FUNCTION_P (fndecl))
11168 if (DECL_MAIN_P (current_function_decl))
11172 /* Make it so that `main' always returns 0 by default (or
11175 stmt = finish_return_stmt (integer_one_node);
11177 stmt = finish_return_stmt (integer_zero_node);
11179 /* Hack. We don't want the middle-end to warn that this
11180 return is unreachable, so put the statement on the
11182 #ifdef USE_MAPPED_LOCATION
11183 SET_EXPR_LOCATION (stmt, UNKNOWN_LOCATION);
11185 annotate_with_file_line (stmt, input_filename, 0);
11189 if (use_eh_spec_block (current_function_decl))
11190 finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
11191 (TREE_TYPE (current_function_decl)),
11192 current_eh_spec_block);
11195 /* If we're saving up tree structure, tie off the function now. */
11196 DECL_SAVED_TREE (fndecl) = pop_stmt_list (DECL_SAVED_TREE (fndecl));
11198 finish_fname_decls ();
11200 /* If this function can't throw any exceptions, remember that. */
11201 if (!processing_template_decl
11202 && !cp_function_chain->can_throw
11203 && !flag_non_call_exceptions
11204 && targetm.binds_local_p (fndecl))
11205 TREE_NOTHROW (fndecl) = 1;
11207 /* This must come after expand_function_end because cleanups might
11208 have declarations (from inline functions) that need to go into
11209 this function's blocks. */
11211 /* If the current binding level isn't the outermost binding level
11212 for this function, either there is a bug, or we have experienced
11213 syntax errors and the statement tree is malformed. */
11214 if (current_binding_level->kind != sk_function_parms)
11216 /* Make sure we have already experienced errors. */
11217 gcc_assert (errorcount);
11219 /* Throw away the broken statement tree and extra binding
11221 DECL_SAVED_TREE (fndecl) = alloc_stmt_list ();
11223 while (current_binding_level->kind != sk_function_parms)
11225 if (current_binding_level->kind == sk_class)
11226 pop_nested_class ();
11228 poplevel (0, 0, 0);
11231 poplevel (1, 0, 1);
11233 /* Statements should always be full-expressions at the outermost set
11234 of curly braces for a function. */
11235 gcc_assert (stmts_are_full_exprs_p ());
11237 /* Set up the named return value optimization, if we can. Candidate
11238 variables are selected in check_return_value. */
11239 if (current_function_return_value)
11241 tree r = current_function_return_value;
11244 if (r != error_mark_node
11245 /* This is only worth doing for fns that return in memory--and
11246 simpler, since we don't have to worry about promoted modes. */
11247 && aggregate_value_p (TREE_TYPE (TREE_TYPE (fndecl)), fndecl)
11248 /* Only allow this for variables declared in the outer scope of
11249 the function so we know that their lifetime always ends with a
11250 return; see g++.dg/opt/nrv6.C. We could be more flexible if
11251 we were to do this optimization in tree-ssa. */
11252 && (outer = outer_curly_brace_block (fndecl))
11253 && chain_member (r, BLOCK_VARS (outer)))
11254 finalize_nrv (&DECL_SAVED_TREE (fndecl), r, DECL_RESULT (fndecl));
11256 current_function_return_value = NULL_TREE;
11259 /* Remember that we were in class scope. */
11260 if (current_class_name)
11261 ctype = current_class_type;
11263 /* Must mark the RESULT_DECL as being in this function. */
11264 DECL_CONTEXT (DECL_RESULT (fndecl)) = fndecl;
11266 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
11267 to the FUNCTION_DECL node itself. */
11268 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl)) = fndecl;
11270 /* Save away current state, if appropriate. */
11271 if (!processing_template_decl)
11272 save_function_data (fndecl);
11274 /* Complain if there's just no return statement. */
11275 if (warn_return_type
11276 && TREE_CODE (TREE_TYPE (fntype)) != VOID_TYPE
11277 && !dependent_type_p (TREE_TYPE (fntype))
11278 && !current_function_returns_value && !current_function_returns_null
11279 /* Don't complain if we abort or throw. */
11280 && !current_function_returns_abnormally
11281 && !DECL_NAME (DECL_RESULT (fndecl))
11282 /* Normally, with -Wreturn-type, flow will complain. Unless we're an
11283 inline function, as we might never be compiled separately. */
11284 && (DECL_INLINE (fndecl) || processing_template_decl)
11285 /* Structor return values (if any) are set by the compiler. */
11286 && !DECL_CONSTRUCTOR_P (fndecl)
11287 && !DECL_DESTRUCTOR_P (fndecl))
11288 warning (OPT_Wreturn_type, "no return statement in function returning non-void");
11290 /* Store the end of the function, so that we get good line number
11291 info for the epilogue. */
11292 cfun->function_end_locus = input_location;
11294 /* Genericize before inlining. */
11295 if (!processing_template_decl)
11297 struct language_function *f = DECL_SAVED_FUNCTION_DATA (fndecl);
11298 cp_genericize (fndecl);
11299 /* Clear out the bits we don't need. */
11300 f->x_current_class_ptr = NULL;
11301 f->x_current_class_ref = NULL;
11302 f->x_eh_spec_block = NULL;
11303 f->x_in_charge_parm = NULL;
11304 f->x_vtt_parm = NULL;
11305 f->x_return_value = NULL;
11306 f->bindings = NULL;
11307 f->extern_decl_map = NULL;
11309 /* Handle attribute((warn_unused_result)). Relies on gimple input. */
11310 c_warn_unused_result (&DECL_SAVED_TREE (fndecl));
11312 /* Clear out the bits we don't need. */
11313 local_names = NULL;
11315 /* We're leaving the context of this function, so zap cfun. It's still in
11316 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
11318 current_function_decl = NULL;
11320 /* If this is an in-class inline definition, we may have to pop the
11321 bindings for the template parameters that we added in
11322 maybe_begin_member_template_processing when start_function was
11324 if (inclass_inline)
11325 maybe_end_member_template_processing ();
11327 /* Leave the scope of the class. */
11329 pop_nested_class ();
11335 /* Let the error reporting routines know that we're outside a
11336 function. For a nested function, this value is used in
11337 cxx_pop_function_context and then reset via pop_function_context. */
11338 current_function_decl = NULL_TREE;
11343 /* Create the FUNCTION_DECL for a function definition.
11344 DECLSPECS and DECLARATOR are the parts of the declaration;
11345 they describe the return type and the name of the function,
11346 but twisted together in a fashion that parallels the syntax of C.
11348 This function creates a binding context for the function body
11349 as well as setting up the FUNCTION_DECL in current_function_decl.
11351 Returns a FUNCTION_DECL on success.
11353 If the DECLARATOR is not suitable for a function (it defines a datum
11354 instead), we return 0, which tells yyparse to report a parse error.
11356 May return void_type_node indicating that this method is actually
11357 a friend. See grokfield for more details.
11359 Came here with a `.pushlevel' .
11361 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
11362 CHANGES TO CODE IN `grokfield'. */
11365 start_method (cp_decl_specifier_seq *declspecs,
11366 const cp_declarator *declarator, tree attrlist)
11368 tree fndecl = grokdeclarator (declarator, declspecs, MEMFUNCDEF, 0,
11371 if (fndecl == error_mark_node)
11372 return error_mark_node;
11374 if (fndecl == NULL || TREE_CODE (fndecl) != FUNCTION_DECL)
11376 error ("invalid member function declaration");
11377 return error_mark_node;
11381 cplus_decl_attributes (&fndecl, attrlist, 0);
11383 /* Pass friends other than inline friend functions back. */
11384 if (fndecl == void_type_node)
11387 if (DECL_IN_AGGR_P (fndecl))
11389 if (DECL_CONTEXT (fndecl)
11390 && TREE_CODE (DECL_CONTEXT (fndecl)) != NAMESPACE_DECL)
11391 error ("%qD is already defined in class %qT", fndecl,
11392 DECL_CONTEXT (fndecl));
11393 return error_mark_node;
11396 check_template_shadow (fndecl);
11398 DECL_DECLARED_INLINE_P (fndecl) = 1;
11399 if (flag_default_inline)
11400 DECL_INLINE (fndecl) = 1;
11402 /* We process method specializations in finish_struct_1. */
11403 if (processing_template_decl && !DECL_TEMPLATE_SPECIALIZATION (fndecl))
11405 fndecl = push_template_decl (fndecl);
11406 if (fndecl == error_mark_node)
11410 if (! DECL_FRIEND_P (fndecl))
11412 if (TREE_CHAIN (fndecl))
11414 fndecl = copy_node (fndecl);
11415 TREE_CHAIN (fndecl) = NULL_TREE;
11419 finish_decl (fndecl, NULL_TREE, NULL_TREE);
11421 /* Make a place for the parms. */
11422 begin_scope (sk_function_parms, fndecl);
11424 DECL_IN_AGGR_P (fndecl) = 1;
11428 /* Go through the motions of finishing a function definition.
11429 We don't compile this method until after the whole class has
11432 FINISH_METHOD must return something that looks as though it
11433 came from GROKFIELD (since we are defining a method, after all).
11435 This is called after parsing the body of the function definition.
11436 STMTS is the chain of statements that makes up the function body.
11438 DECL is the ..._DECL that `start_method' provided. */
11441 finish_method (tree decl)
11443 tree fndecl = decl;
11448 if (decl == void_type_node)
11451 old_initial = DECL_INITIAL (fndecl);
11453 /* Undo the level for the parms (from start_method).
11454 This is like poplevel, but it causes nothing to be
11455 saved. Saving information here confuses symbol-table
11456 output routines. Besides, this information will
11457 be correctly output when this method is actually
11460 /* Clear out the meanings of the local variables of this level;
11461 also record in each decl which block it belongs to. */
11463 for (link = current_binding_level->names; link; link = TREE_CHAIN (link))
11465 if (DECL_NAME (link) != NULL_TREE)
11466 pop_binding (DECL_NAME (link), link);
11467 gcc_assert (TREE_CODE (link) != FUNCTION_DECL);
11468 DECL_CONTEXT (link) = NULL_TREE;
11471 poplevel (0, 0, 0);
11473 DECL_INITIAL (fndecl) = old_initial;
11475 /* We used to check if the context of FNDECL was different from
11476 current_class_type as another way to get inside here. This didn't work
11477 for String.cc in libg++. */
11478 if (DECL_FRIEND_P (fndecl))
11480 VEC_safe_push (tree, gc, CLASSTYPE_INLINE_FRIENDS (current_class_type),
11482 decl = void_type_node;
11489 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
11490 we can lay it out later, when and if its type becomes complete. */
11493 maybe_register_incomplete_var (tree var)
11495 gcc_assert (TREE_CODE (var) == VAR_DECL);
11497 /* Keep track of variables with incomplete types. */
11498 if (!processing_template_decl && TREE_TYPE (var) != error_mark_node
11499 && DECL_EXTERNAL (var))
11501 tree inner_type = TREE_TYPE (var);
11503 while (TREE_CODE (inner_type) == ARRAY_TYPE)
11504 inner_type = TREE_TYPE (inner_type);
11505 inner_type = TYPE_MAIN_VARIANT (inner_type);
11507 if ((!COMPLETE_TYPE_P (inner_type) && CLASS_TYPE_P (inner_type))
11508 /* RTTI TD entries are created while defining the type_info. */
11509 || (TYPE_LANG_SPECIFIC (inner_type)
11510 && TYPE_BEING_DEFINED (inner_type)))
11511 incomplete_vars = tree_cons (inner_type, var, incomplete_vars);
11515 /* Called when a class type (given by TYPE) is defined. If there are
11516 any existing VAR_DECLs whose type hsa been completed by this
11517 declaration, update them now. */
11520 complete_vars (tree type)
11522 tree *list = &incomplete_vars;
11524 gcc_assert (CLASS_TYPE_P (type));
11527 if (same_type_p (type, TREE_PURPOSE (*list)))
11529 tree var = TREE_VALUE (*list);
11530 tree type = TREE_TYPE (var);
11531 /* Complete the type of the variable. The VAR_DECL itself
11532 will be laid out in expand_expr. */
11533 complete_type (type);
11534 cp_apply_type_quals_to_decl (cp_type_quals (type), var);
11535 /* Remove this entry from the list. */
11536 *list = TREE_CHAIN (*list);
11539 list = &TREE_CHAIN (*list);
11542 /* Check for pending declarations which may have abstract type. */
11543 complete_type_check_abstract (type);
11546 /* If DECL is of a type which needs a cleanup, build that cleanup
11550 cxx_maybe_build_cleanup (tree decl)
11552 tree type = TREE_TYPE (decl);
11554 if (type != error_mark_node && TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
11556 int flags = LOOKUP_NORMAL|LOOKUP_DESTRUCTOR;
11558 bool has_vbases = (TREE_CODE (type) == RECORD_TYPE
11559 && CLASSTYPE_VBASECLASSES (type));
11561 if (TREE_CODE (type) == ARRAY_TYPE)
11565 cxx_mark_addressable (decl);
11566 rval = build_unary_op (ADDR_EXPR, decl, 0);
11569 /* Optimize for space over speed here. */
11570 if (!has_vbases || flag_expensive_optimizations)
11571 flags |= LOOKUP_NONVIRTUAL;
11573 rval = build_delete (TREE_TYPE (rval), rval,
11574 sfk_complete_destructor, flags, 0);
11581 /* When a stmt has been parsed, this function is called. */
11588 /* DECL was originally constructed as a non-static member function,
11589 but turned out to be static. Update it accordingly. */
11592 revert_static_member_fn (tree decl)
11595 tree function = TREE_TYPE (decl);
11596 tree args = TYPE_ARG_TYPES (function);
11598 if (cp_type_quals (TREE_TYPE (TREE_VALUE (args)))
11599 != TYPE_UNQUALIFIED)
11600 error ("static member function %q#D declared with type qualifiers", decl);
11602 args = TREE_CHAIN (args);
11603 tmp = build_function_type (TREE_TYPE (function), args);
11604 tmp = build_qualified_type (tmp, cp_type_quals (function));
11605 tmp = build_exception_variant (tmp,
11606 TYPE_RAISES_EXCEPTIONS (function));
11607 TREE_TYPE (decl) = tmp;
11608 if (DECL_ARGUMENTS (decl))
11609 DECL_ARGUMENTS (decl) = TREE_CHAIN (DECL_ARGUMENTS (decl));
11610 DECL_STATIC_FUNCTION_P (decl) = 1;
11613 /* Initialize the variables used during compilation of a C++
11617 cxx_push_function_context (struct function * f)
11619 struct language_function *p = GGC_CNEW (struct language_function);
11622 /* Whenever we start a new function, we destroy temporaries in the
11624 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
11630 if (DECL_SAVED_FUNCTION_DATA (fn))
11632 /* If we already parsed this function, and we're just expanding it
11633 now, restore saved state. */
11634 *cp_function_chain = *DECL_SAVED_FUNCTION_DATA (fn);
11636 /* We don't need the saved data anymore. Unless this is an inline
11637 function; we need the named return value info for
11638 declare_return_variable. */
11639 if (! DECL_INLINE (fn))
11640 DECL_SAVED_FUNCTION_DATA (fn) = NULL;
11645 /* Free the language-specific parts of F, now that we've finished
11646 compiling the function. */
11649 cxx_pop_function_context (struct function * f)
11654 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
11655 one of the language-independent trees. */
11657 enum cp_tree_node_structure_enum
11658 cp_tree_node_structure (union lang_tree_node * t)
11660 switch (TREE_CODE (&t->generic))
11662 case DEFAULT_ARG: return TS_CP_DEFAULT_ARG;
11663 case IDENTIFIER_NODE: return TS_CP_IDENTIFIER;
11664 case OVERLOAD: return TS_CP_OVERLOAD;
11665 case TEMPLATE_PARM_INDEX: return TS_CP_TPI;
11666 case TINST_LEVEL: return TS_CP_TINST_LEVEL;
11667 case PTRMEM_CST: return TS_CP_PTRMEM;
11668 case BASELINK: return TS_CP_BASELINK;
11669 case STATIC_ASSERT: return TS_CP_STATIC_ASSERT;
11670 default: return TS_CP_GENERIC;
11674 /* Build the void_list_node (void_type_node having been created). */
11676 build_void_list_node (void)
11678 tree t = build_tree_list (NULL_TREE, void_type_node);
11683 cp_missing_noreturn_ok_p (tree decl)
11685 /* A missing noreturn is ok for the `main' function. */
11686 return DECL_MAIN_P (decl);
11689 /* Return the COMDAT group into which DECL should be placed. */
11692 cxx_comdat_group (tree decl)
11696 /* Virtual tables, construction virtual tables, and virtual table
11697 tables all go in a single COMDAT group, named after the primary
11699 if (TREE_CODE (decl) == VAR_DECL && DECL_VTABLE_OR_VTT_P (decl))
11700 name = DECL_ASSEMBLER_NAME (CLASSTYPE_VTABLES (DECL_CONTEXT (decl)));
11701 /* For all other DECLs, the COMDAT group is the mangled name of the
11702 declaration itself. */
11705 while (DECL_THUNK_P (decl))
11707 /* If TARGET_USE_LOCAL_THUNK_ALIAS_P, use_thunk puts the thunk
11708 into the same section as the target function. In that case
11709 we must return target's name. */
11710 tree target = THUNK_TARGET (decl);
11711 if (TARGET_USE_LOCAL_THUNK_ALIAS_P (target)
11712 && DECL_SECTION_NAME (target) != NULL
11713 && DECL_ONE_ONLY (target))
11718 name = DECL_ASSEMBLER_NAME (decl);
11721 return IDENTIFIER_POINTER (name);
11724 #include "gt-cp-decl.h"