1 /* Process declarations and variables for C++ compiler.
2 Copyright (C) 1988, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
3 2001, 2002, 2003, 2004, 2005, 2006, 2007 Free Software Foundation, Inc.
4 Contributed by Michael Tiemann (tiemann@cygnus.com)
6 This file is part of GCC.
8 GCC is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2, or (at your option)
13 GCC is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING. If not, write to
20 the Free Software Foundation, 51 Franklin Street, Fifth Floor,
21 Boston, MA 02110-1301, USA. */
24 /* Process declarations and symbol lookup for C++ front end.
25 Also constructs types; the standard scalar types at initialization,
26 and structure, union, array and enum types when they are declared. */
28 /* ??? not all decl nodes are given the most useful possible
29 line numbers. For example, the CONST_DECLs for enum values. */
33 #include "coretypes.h"
40 #include "tree-inline.h"
50 #include "diagnostic.h"
54 #include "tree-flow.h"
56 static tree grokparms (cp_parameter_declarator *, tree *);
57 static const char *redeclaration_error_message (tree, tree);
59 static int decl_jump_unsafe (tree);
60 static void require_complete_types_for_parms (tree);
61 static int ambi_op_p (enum tree_code);
62 static int unary_op_p (enum tree_code);
63 static void push_local_name (tree);
64 static tree grok_reference_init (tree, tree, tree, tree *);
65 static tree grokvardecl (tree, tree, const cp_decl_specifier_seq *,
67 static void record_unknown_type (tree, const char *);
68 static tree builtin_function_1 (tree, tree);
69 static tree build_library_fn_1 (tree, enum tree_code, tree);
70 static int member_function_or_else (tree, tree, enum overload_flags);
71 static void bad_specifiers (tree, const char *, int, int, int, int,
73 static void check_for_uninitialized_const_var (tree);
74 static hashval_t typename_hash (const void *);
75 static int typename_compare (const void *, const void *);
76 static tree local_variable_p_walkfn (tree *, int *, void *);
77 static tree record_builtin_java_type (const char *, int);
78 static const char *tag_name (enum tag_types);
79 static tree lookup_and_check_tag (enum tag_types, tree, tag_scope, bool);
80 static int walk_namespaces_r (tree, walk_namespaces_fn, void *);
81 static void maybe_deduce_size_from_array_init (tree, tree);
82 static void layout_var_decl (tree);
83 static void maybe_commonize_var (tree);
84 static tree check_initializer (tree, tree, int, tree *);
85 static void make_rtl_for_nonlocal_decl (tree, tree, const char *);
86 static void save_function_data (tree);
87 static void check_function_type (tree, tree);
88 static void finish_constructor_body (void);
89 static void begin_destructor_body (void);
90 static void finish_destructor_body (void);
91 static tree create_array_type_for_decl (tree, tree, tree);
92 static tree get_atexit_node (void);
93 static tree get_dso_handle_node (void);
94 static tree start_cleanup_fn (void);
95 static void end_cleanup_fn (void);
96 static tree cp_make_fname_decl (tree, int);
97 static void initialize_predefined_identifiers (void);
98 static tree check_special_function_return_type
99 (special_function_kind, tree, tree);
100 static tree push_cp_library_fn (enum tree_code, tree);
101 static tree build_cp_library_fn (tree, enum tree_code, tree);
102 static void store_parm_decls (tree);
103 static void initialize_local_var (tree, tree);
104 static void expand_static_init (tree, tree);
105 static tree next_initializable_field (tree);
107 /* The following symbols are subsumed in the cp_global_trees array, and
108 listed here individually for documentation purposes.
111 tree wchar_decl_node;
113 tree vtable_entry_type;
114 tree delta_type_node;
115 tree __t_desc_type_node;
117 tree class_type_node;
118 tree unknown_type_node;
120 Array type `vtable_entry_type[]'
123 tree vtbl_ptr_type_node;
130 A FUNCTION_DECL which can call `abort'. Not necessarily the
131 one that the user will declare, but sufficient to be called
132 by routines that want to abort the program.
136 The FUNCTION_DECL for the default `::operator delete'.
138 tree global_delete_fndecl;
141 tree type_info_type_node, tinfo_decl_id, tinfo_decl_type;
142 tree tinfo_var_id; */
144 tree cp_global_trees[CPTI_MAX];
146 /* Indicates that there is a type value in some namespace, although
147 that is not necessarily in scope at the moment. */
149 tree global_type_node;
151 /* The node that holds the "name" of the global scope. */
152 tree global_scope_name;
154 #define local_names cp_function_chain->x_local_names
156 /* A list of objects which have constructors or destructors
157 which reside in the global scope. The decl is stored in
158 the TREE_VALUE slot and the initializer is stored
159 in the TREE_PURPOSE slot. */
160 tree static_aggregates;
164 /* A node for the integer constants 2, and 3. */
166 tree integer_two_node, integer_three_node;
168 /* Used only for jumps to as-yet undefined labels, since jumps to
169 defined labels can have their validity checked immediately. */
171 struct named_label_use_entry GTY(())
173 struct named_label_use_entry *next;
174 /* The binding level to which this entry is *currently* attached.
175 This is initially the binding level in which the goto appeared,
176 but is modified as scopes are closed. */
177 struct cp_binding_level *binding_level;
178 /* The head of the names list that was current when the goto appeared,
179 or the inner scope popped. These are the decls that will *not* be
180 skipped when jumping to the label. */
182 /* The location of the goto, for error reporting. */
183 location_t o_goto_locus;
184 /* True if an OpenMP structured block scope has been closed since
185 the goto appeared. This means that the branch from the label will
186 illegally exit an OpenMP scope. */
190 /* A list of all LABEL_DECLs in the function that have names. Here so
191 we can clear out their names' definitions at the end of the
192 function, and so we can check the validity of jumps to these labels. */
194 struct named_label_entry GTY(())
196 /* The decl itself. */
199 /* The binding level to which the label is *currently* attached.
200 This is initially set to the binding level in which the label
201 is defined, but is modified as scopes are closed. */
202 struct cp_binding_level *binding_level;
203 /* The head of the names list that was current when the label was
204 defined, or the inner scope popped. These are the decls that will
205 be skipped when jumping to the label. */
207 /* A tree list of all decls from all binding levels that would be
208 crossed by a backward branch to the label. */
211 /* A list of uses of the label, before the label is defined. */
212 struct named_label_use_entry *uses;
214 /* The following bits are set after the label is defined, and are
215 updated as scopes are popped. They indicate that a backward jump
216 to the label will illegally enter a scope of the given flavor. */
222 #define named_labels cp_function_chain->x_named_labels
224 /* The number of function bodies which we are currently processing.
225 (Zero if we are at namespace scope, one inside the body of a
226 function, two inside the body of a function in a local class, etc.) */
229 /* States indicating how grokdeclarator() should handle declspecs marked
230 with __attribute__((deprecated)). An object declared as
231 __attribute__((deprecated)) suppresses warnings of uses of other
234 enum deprecated_states {
239 static enum deprecated_states deprecated_state = DEPRECATED_NORMAL;
242 /* A TREE_LIST of VAR_DECLs. The TREE_PURPOSE is a RECORD_TYPE or
243 UNION_TYPE; the TREE_VALUE is a VAR_DECL with that type. At the
244 time the VAR_DECL was declared, the type was incomplete. */
246 static GTY(()) tree incomplete_vars;
248 /* Returns the kind of template specialization we are currently
249 processing, given that it's declaration contained N_CLASS_SCOPES
250 explicit scope qualifications. */
253 current_tmpl_spec_kind (int n_class_scopes)
255 int n_template_parm_scopes = 0;
256 int seen_specialization_p = 0;
257 int innermost_specialization_p = 0;
258 struct cp_binding_level *b;
260 /* Scan through the template parameter scopes. */
261 for (b = current_binding_level;
262 b->kind == sk_template_parms;
265 /* If we see a specialization scope inside a parameter scope,
266 then something is wrong. That corresponds to a declaration
269 template <class T> template <> ...
271 which is always invalid since [temp.expl.spec] forbids the
272 specialization of a class member template if the enclosing
273 class templates are not explicitly specialized as well. */
274 if (b->explicit_spec_p)
276 if (n_template_parm_scopes == 0)
277 innermost_specialization_p = 1;
279 seen_specialization_p = 1;
281 else if (seen_specialization_p == 1)
282 return tsk_invalid_member_spec;
284 ++n_template_parm_scopes;
287 /* Handle explicit instantiations. */
288 if (processing_explicit_instantiation)
290 if (n_template_parm_scopes != 0)
291 /* We've seen a template parameter list during an explicit
292 instantiation. For example:
294 template <class T> template void f(int);
296 This is erroneous. */
297 return tsk_invalid_expl_inst;
299 return tsk_expl_inst;
302 if (n_template_parm_scopes < n_class_scopes)
303 /* We've not seen enough template headers to match all the
304 specialized classes present. For example:
306 template <class T> void R<T>::S<T>::f(int);
308 This is invalid; there needs to be one set of template
309 parameters for each class. */
310 return tsk_insufficient_parms;
311 else if (n_template_parm_scopes == n_class_scopes)
312 /* We're processing a non-template declaration (even though it may
313 be a member of a template class.) For example:
315 template <class T> void S<T>::f(int);
317 The `class T' maches the `S<T>', leaving no template headers
318 corresponding to the `f'. */
320 else if (n_template_parm_scopes > n_class_scopes + 1)
321 /* We've got too many template headers. For example:
323 template <> template <class T> void f (T);
325 There need to be more enclosing classes. */
326 return tsk_excessive_parms;
328 /* This must be a template. It's of the form:
330 template <class T> template <class U> void S<T>::f(U);
332 This is a specialization if the innermost level was a
333 specialization; otherwise it's just a definition of the
335 return innermost_specialization_p ? tsk_expl_spec : tsk_template;
338 /* Exit the current scope. */
346 /* When a label goes out of scope, check to see if that label was used
347 in a valid manner, and issue any appropriate warnings or errors. */
350 pop_label (tree label, tree old_value)
352 if (!processing_template_decl)
354 if (DECL_INITIAL (label) == NULL_TREE)
358 error ("label %q+D used but not defined", label);
359 #ifdef USE_MAPPED_LOCATION
360 location = input_location; /* FIXME want (input_filename, (line)0) */
362 location.file = input_filename;
365 /* Avoid crashing later. */
366 define_label (location, DECL_NAME (label));
369 warn_for_unused_label (label);
372 SET_IDENTIFIER_LABEL_VALUE (DECL_NAME (label), old_value);
375 /* At the end of a function, all labels declared within the function
376 go out of scope. BLOCK is the top-level block for the
380 pop_labels_1 (void **slot, void *data)
382 struct named_label_entry *ent = (struct named_label_entry *) *slot;
383 tree block = (tree) data;
385 pop_label (ent->label_decl, NULL_TREE);
387 /* Put the labels into the "variables" of the top-level block,
388 so debugger can see them. */
389 TREE_CHAIN (ent->label_decl) = BLOCK_VARS (block);
390 BLOCK_VARS (block) = ent->label_decl;
392 htab_clear_slot (named_labels, slot);
398 pop_labels (tree block)
402 htab_traverse (named_labels, pop_labels_1, block);
407 /* At the end of a block with local labels, restore the outer definition. */
410 pop_local_label (tree label, tree old_value)
412 struct named_label_entry dummy;
415 pop_label (label, old_value);
417 dummy.label_decl = label;
418 slot = htab_find_slot (named_labels, &dummy, NO_INSERT);
419 htab_clear_slot (named_labels, slot);
422 /* The following two routines are used to interface to Objective-C++.
423 The binding level is purposely treated as an opaque type. */
426 objc_get_current_scope (void)
428 return current_binding_level;
431 /* The following routine is used by the NeXT-style SJLJ exceptions;
432 variables get marked 'volatile' so as to not be clobbered by
433 _setjmp()/_longjmp() calls. All variables in the current scope,
434 as well as parent scopes up to (but not including) ENCLOSING_BLK
435 shall be thusly marked. */
438 objc_mark_locals_volatile (void *enclosing_blk)
440 struct cp_binding_level *scope;
442 for (scope = current_binding_level;
443 scope && scope != enclosing_blk;
444 scope = scope->level_chain)
448 for (decl = scope->names; decl; decl = TREE_CHAIN (decl))
449 objc_volatilize_decl (decl);
451 /* Do not climb up past the current function. */
452 if (scope->kind == sk_function_parms)
457 /* Update data for defined and undefined labels when leaving a scope. */
460 poplevel_named_label_1 (void **slot, void *data)
462 struct named_label_entry *ent = (struct named_label_entry *) *slot;
463 struct cp_binding_level *bl = (struct cp_binding_level *) data;
464 struct cp_binding_level *obl = bl->level_chain;
466 if (ent->binding_level == bl)
470 for (decl = ent->names_in_scope; decl; decl = TREE_CHAIN (decl))
471 if (decl_jump_unsafe (decl))
472 ent->bad_decls = tree_cons (NULL, decl, ent->bad_decls);
474 ent->binding_level = obl;
475 ent->names_in_scope = obl->names;
479 ent->in_try_scope = true;
482 ent->in_catch_scope = true;
485 ent->in_omp_scope = true;
493 struct named_label_use_entry *use;
495 for (use = ent->uses; use ; use = use->next)
496 if (use->binding_level == bl)
498 use->binding_level = obl;
499 use->names_in_scope = obl->names;
500 if (bl->kind == sk_omp)
501 use->in_omp_scope = true;
508 /* Exit a binding level.
509 Pop the level off, and restore the state of the identifier-decl mappings
510 that were in effect when this level was entered.
512 If KEEP == 1, this level had explicit declarations, so
513 and create a "block" (a BLOCK node) for the level
514 to record its declarations and subblocks for symbol table output.
516 If FUNCTIONBODY is nonzero, this level is the body of a function,
517 so create a block as if KEEP were set and also clear out all
520 If REVERSE is nonzero, reverse the order of decls before putting
521 them into the BLOCK. */
524 poplevel (int keep, int reverse, int functionbody)
527 /* The chain of decls was accumulated in reverse order.
528 Put it into forward order, just for cleanliness. */
530 int tmp = functionbody;
531 int real_functionbody;
535 int leaving_for_scope;
538 timevar_push (TV_NAME_LOOKUP);
543 gcc_assert (current_binding_level->kind != sk_class);
545 real_functionbody = (current_binding_level->kind == sk_cleanup
546 ? ((functionbody = 0), tmp) : functionbody);
547 subblocks = functionbody >= 0 ? current_binding_level->blocks : 0;
549 gcc_assert (!VEC_length(cp_class_binding,
550 current_binding_level->class_shadowed));
552 /* We used to use KEEP == 2 to indicate that the new block should go
553 at the beginning of the list of blocks at this binding level,
554 rather than the end. This hack is no longer used. */
555 gcc_assert (keep == 0 || keep == 1);
557 if (current_binding_level->keep)
560 /* Any uses of undefined labels, and any defined labels, now operate
561 under constraints of next binding contour. */
562 if (cfun && !functionbody && named_labels)
563 htab_traverse (named_labels, poplevel_named_label_1,
564 current_binding_level);
566 /* Get the decls in the order they were written.
567 Usually current_binding_level->names is in reverse order.
568 But parameter decls were previously put in forward order. */
571 current_binding_level->names
572 = decls = nreverse (current_binding_level->names);
574 decls = current_binding_level->names;
576 /* If there were any declarations or structure tags in that level,
577 or if this level is a function body,
578 create a BLOCK to record them for the life of this function. */
580 if (keep == 1 || functionbody)
581 block = make_node (BLOCK);
582 if (block != NULL_TREE)
584 BLOCK_VARS (block) = decls;
585 BLOCK_SUBBLOCKS (block) = subblocks;
588 /* In each subblock, record that this is its superior. */
590 for (link = subblocks; link; link = TREE_CHAIN (link))
591 BLOCK_SUPERCONTEXT (link) = block;
593 /* We still support the old for-scope rules, whereby the variables
594 in a for-init statement were in scope after the for-statement
595 ended. We only use the new rules if flag_new_for_scope is
598 = current_binding_level->kind == sk_for && flag_new_for_scope == 1;
600 /* Before we remove the declarations first check for unused variables. */
601 if (warn_unused_variable
602 && !processing_template_decl)
603 for (decl = getdecls (); decl; decl = TREE_CHAIN (decl))
604 if (TREE_CODE (decl) == VAR_DECL
605 && ! TREE_USED (decl)
606 && ! DECL_IN_SYSTEM_HEADER (decl)
607 && DECL_NAME (decl) && ! DECL_ARTIFICIAL (decl))
608 warning (OPT_Wunused_variable, "unused variable %q+D", decl);
610 /* Remove declarations for all the DECLs in this level. */
611 for (link = decls; link; link = TREE_CHAIN (link))
613 if (leaving_for_scope && TREE_CODE (link) == VAR_DECL
616 tree name = DECL_NAME (link);
620 ob = outer_binding (name,
621 IDENTIFIER_BINDING (name),
624 ns_binding = IDENTIFIER_NAMESPACE_VALUE (name);
626 ns_binding = NULL_TREE;
628 if (ob && ob->scope == current_binding_level->level_chain)
629 /* We have something like:
634 and we are leaving the `for' scope. There's no reason to
635 keep the binding of the inner `i' in this case. */
636 pop_binding (name, link);
637 else if ((ob && (TREE_CODE (ob->value) == TYPE_DECL))
638 || (ns_binding && TREE_CODE (ns_binding) == TYPE_DECL))
639 /* Here, we have something like:
647 We must pop the for-scope binding so we know what's a
648 type and what isn't. */
649 pop_binding (name, link);
652 /* Mark this VAR_DECL as dead so that we can tell we left it
653 there only for backward compatibility. */
654 DECL_DEAD_FOR_LOCAL (link) = 1;
656 /* Keep track of what should have happened when we
657 popped the binding. */
660 SET_DECL_SHADOWED_FOR_VAR (link, ob->value);
661 DECL_HAS_SHADOWED_FOR_VAR_P (link) = 1;
664 /* Add it to the list of dead variables in the next
665 outermost binding to that we can remove these when we
666 leave that binding. */
667 current_binding_level->level_chain->dead_vars_from_for
668 = tree_cons (NULL_TREE, link,
669 current_binding_level->level_chain->
672 /* Although we don't pop the cxx_binding, we do clear
673 its SCOPE since the scope is going away now. */
674 IDENTIFIER_BINDING (name)->scope
675 = current_binding_level->level_chain;
682 /* Remove the binding. */
685 if (TREE_CODE (decl) == TREE_LIST)
686 decl = TREE_VALUE (decl);
689 if (TREE_CODE (name) == OVERLOAD)
690 name = OVL_FUNCTION (name);
692 gcc_assert (DECL_P (name));
693 pop_binding (DECL_NAME (name), decl);
697 /* Remove declarations for any `for' variables from inner scopes
698 that we kept around. */
699 for (link = current_binding_level->dead_vars_from_for;
700 link; link = TREE_CHAIN (link))
701 pop_binding (DECL_NAME (TREE_VALUE (link)), TREE_VALUE (link));
703 /* Restore the IDENTIFIER_TYPE_VALUEs. */
704 for (link = current_binding_level->type_shadowed;
705 link; link = TREE_CHAIN (link))
706 SET_IDENTIFIER_TYPE_VALUE (TREE_PURPOSE (link), TREE_VALUE (link));
708 /* Restore the IDENTIFIER_LABEL_VALUEs for local labels. */
709 for (link = current_binding_level->shadowed_labels;
711 link = TREE_CHAIN (link))
712 pop_local_label (TREE_VALUE (link), TREE_PURPOSE (link));
714 /* There may be OVERLOADs (wrapped in TREE_LISTs) on the BLOCK_VARs
715 list if a `using' declaration put them there. The debugging
716 back ends won't understand OVERLOAD, so we remove them here.
717 Because the BLOCK_VARS are (temporarily) shared with
718 CURRENT_BINDING_LEVEL->NAMES we must do this fixup after we have
719 popped all the bindings. */
724 for (d = &BLOCK_VARS (block); *d; )
726 if (TREE_CODE (*d) == TREE_LIST)
727 *d = TREE_CHAIN (*d);
729 d = &TREE_CHAIN (*d);
733 /* If the level being exited is the top level of a function,
734 check over all the labels. */
737 /* Since this is the top level block of a function, the vars are
738 the function's parameters. Don't leave them in the BLOCK
739 because they are found in the FUNCTION_DECL instead. */
740 BLOCK_VARS (block) = 0;
744 kind = current_binding_level->kind;
745 if (kind == sk_cleanup)
749 /* If this is a temporary binding created for a cleanup, then we'll
750 have pushed a statement list level. Pop that, create a new
751 BIND_EXPR for the block, and insert it into the stream. */
752 stmt = pop_stmt_list (current_binding_level->statement_list);
753 stmt = c_build_bind_expr (block, stmt);
760 /* The current function is being defined, so its DECL_INITIAL
761 should be error_mark_node. */
762 gcc_assert (DECL_INITIAL (current_function_decl) == error_mark_node);
763 DECL_INITIAL (current_function_decl) = block;
766 current_binding_level->blocks
767 = chainon (current_binding_level->blocks, block);
769 /* If we did not make a block for the level just exited,
770 any blocks made for inner levels
771 (since they cannot be recorded as subblocks in that level)
772 must be carried forward so they will later become subblocks
773 of something else. */
775 current_binding_level->blocks
776 = chainon (current_binding_level->blocks, subblocks);
778 /* Each and every BLOCK node created here in `poplevel' is important
779 (e.g. for proper debugging information) so if we created one
780 earlier, mark it as "used". */
782 TREE_USED (block) = 1;
784 /* All temporary bindings created for cleanups are popped silently. */
785 if (kind == sk_cleanup)
788 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, block);
791 /* Insert BLOCK at the end of the list of subblocks of the
792 current binding level. This is used when a BIND_EXPR is expanded,
793 to handle the BLOCK node inside the BIND_EXPR. */
796 insert_block (tree block)
798 TREE_USED (block) = 1;
799 current_binding_level->blocks
800 = chainon (current_binding_level->blocks, block);
803 /* Walk all the namespaces contained NAMESPACE, including NAMESPACE
804 itself, calling F for each. The DATA is passed to F as well. */
807 walk_namespaces_r (tree namespace, walk_namespaces_fn f, void* data)
810 tree current = NAMESPACE_LEVEL (namespace)->namespaces;
812 result |= (*f) (namespace, data);
814 for (; current; current = TREE_CHAIN (current))
815 result |= walk_namespaces_r (current, f, data);
820 /* Walk all the namespaces, calling F for each. The DATA is passed to
824 walk_namespaces (walk_namespaces_fn f, void* data)
826 return walk_namespaces_r (global_namespace, f, data);
829 /* Call wrapup_globals_declarations for the globals in NAMESPACE. If
830 DATA is non-NULL, this is the last time we will call
831 wrapup_global_declarations for this NAMESPACE. */
834 wrapup_globals_for_namespace (tree namespace, void* data)
836 struct cp_binding_level *level = NAMESPACE_LEVEL (namespace);
837 VEC(tree,gc) *statics = level->static_decls;
838 tree *vec = VEC_address (tree, statics);
839 int len = VEC_length (tree, statics);
840 int last_time = (data != 0);
844 check_global_declarations (vec, len);
845 emit_debug_global_declarations (vec, len);
849 /* Write out any globals that need to be output. */
850 return wrapup_global_declarations (vec, len);
854 /* In C++, you don't have to write `struct S' to refer to `S'; you
855 can just use `S'. We accomplish this by creating a TYPE_DECL as
856 if the user had written `typedef struct S S'. Create and return
857 the TYPE_DECL for TYPE. */
860 create_implicit_typedef (tree name, tree type)
864 decl = build_decl (TYPE_DECL, name, type);
865 DECL_ARTIFICIAL (decl) = 1;
866 /* There are other implicit type declarations, like the one *within*
867 a class that allows you to write `S::S'. We must distinguish
869 SET_DECL_IMPLICIT_TYPEDEF_P (decl);
870 TYPE_NAME (type) = decl;
875 /* Remember a local name for name-mangling purposes. */
878 push_local_name (tree decl)
883 timevar_push (TV_NAME_LOOKUP);
885 name = DECL_NAME (decl);
887 nelts = VEC_length (tree, local_names);
888 for (i = 0; i < nelts; i++)
890 t = VEC_index (tree, local_names, i);
891 if (DECL_NAME (t) == name)
893 if (!DECL_LANG_SPECIFIC (decl))
894 retrofit_lang_decl (decl);
895 DECL_LANG_SPECIFIC (decl)->decl_flags.u2sel = 1;
896 if (DECL_LANG_SPECIFIC (t))
897 DECL_DISCRIMINATOR (decl) = DECL_DISCRIMINATOR (t) + 1;
899 DECL_DISCRIMINATOR (decl) = 1;
901 VEC_replace (tree, local_names, i, decl);
902 timevar_pop (TV_NAME_LOOKUP);
907 VEC_safe_push (tree, gc, local_names, decl);
908 timevar_pop (TV_NAME_LOOKUP);
911 /* Subroutine of duplicate_decls: return truthvalue of whether
912 or not types of these decls match.
914 For C++, we must compare the parameter list so that `int' can match
915 `int&' in a parameter position, but `int&' is not confused with
919 decls_match (tree newdecl, tree olddecl)
923 if (newdecl == olddecl)
926 if (TREE_CODE (newdecl) != TREE_CODE (olddecl))
927 /* If the two DECLs are not even the same kind of thing, we're not
928 interested in their types. */
931 if (TREE_CODE (newdecl) == FUNCTION_DECL)
933 tree f1 = TREE_TYPE (newdecl);
934 tree f2 = TREE_TYPE (olddecl);
935 tree p1 = TYPE_ARG_TYPES (f1);
936 tree p2 = TYPE_ARG_TYPES (f2);
938 if (CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl)
939 && ! (DECL_EXTERN_C_P (newdecl)
940 && DECL_EXTERN_C_P (olddecl)))
943 if (TREE_CODE (f1) != TREE_CODE (f2))
946 if (same_type_p (TREE_TYPE (f1), TREE_TYPE (f2)))
948 if (p2 == NULL_TREE && DECL_EXTERN_C_P (olddecl)
949 && (DECL_BUILT_IN (olddecl)
950 #ifndef NO_IMPLICIT_EXTERN_C
951 || (DECL_IN_SYSTEM_HEADER (newdecl) && !DECL_CLASS_SCOPE_P (newdecl))
952 || (DECL_IN_SYSTEM_HEADER (olddecl) && !DECL_CLASS_SCOPE_P (olddecl))
956 types_match = self_promoting_args_p (p1);
957 if (p1 == void_list_node)
958 TREE_TYPE (newdecl) = TREE_TYPE (olddecl);
960 #ifndef NO_IMPLICIT_EXTERN_C
961 else if (p1 == NULL_TREE
962 && (DECL_EXTERN_C_P (olddecl)
963 && DECL_IN_SYSTEM_HEADER (olddecl)
964 && !DECL_CLASS_SCOPE_P (olddecl))
965 && (DECL_EXTERN_C_P (newdecl)
966 && DECL_IN_SYSTEM_HEADER (newdecl)
967 && !DECL_CLASS_SCOPE_P (newdecl)))
969 types_match = self_promoting_args_p (p2);
970 TREE_TYPE (newdecl) = TREE_TYPE (olddecl);
974 types_match = compparms (p1, p2);
979 else if (TREE_CODE (newdecl) == TEMPLATE_DECL)
981 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl))
982 != TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)))
985 if (!comp_template_parms (DECL_TEMPLATE_PARMS (newdecl),
986 DECL_TEMPLATE_PARMS (olddecl)))
989 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
990 types_match = same_type_p (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl)),
991 TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl)));
993 types_match = decls_match (DECL_TEMPLATE_RESULT (olddecl),
994 DECL_TEMPLATE_RESULT (newdecl));
998 /* Need to check scope for variable declaration (VAR_DECL).
999 For typedef (TYPE_DECL), scope is ignored. */
1000 if (TREE_CODE (newdecl) == VAR_DECL
1001 && CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl)
1003 Two declarations for an object with C language linkage
1004 with the same name (ignoring the namespace that qualify
1005 it) that appear in different namespace scopes refer to
1007 && !(DECL_EXTERN_C_P (olddecl) && DECL_EXTERN_C_P (newdecl)))
1010 if (TREE_TYPE (newdecl) == error_mark_node)
1011 types_match = TREE_TYPE (olddecl) == error_mark_node;
1012 else if (TREE_TYPE (olddecl) == NULL_TREE)
1013 types_match = TREE_TYPE (newdecl) == NULL_TREE;
1014 else if (TREE_TYPE (newdecl) == NULL_TREE)
1017 types_match = comptypes (TREE_TYPE (newdecl),
1018 TREE_TYPE (olddecl),
1019 COMPARE_REDECLARATION);
1025 /* If NEWDECL is `static' and an `extern' was seen previously,
1026 warn about it. OLDDECL is the previous declaration.
1028 Note that this does not apply to the C++ case of declaring
1029 a variable `extern const' and then later `const'.
1031 Don't complain about built-in functions, since they are beyond
1032 the user's control. */
1035 warn_extern_redeclared_static (tree newdecl, tree olddecl)
1039 if (TREE_CODE (newdecl) == TYPE_DECL
1040 || TREE_CODE (newdecl) == TEMPLATE_DECL
1041 || TREE_CODE (newdecl) == CONST_DECL
1042 || TREE_CODE (newdecl) == NAMESPACE_DECL)
1045 /* Don't get confused by static member functions; that's a different
1047 if (TREE_CODE (newdecl) == FUNCTION_DECL
1048 && DECL_STATIC_FUNCTION_P (newdecl))
1051 /* If the old declaration was `static', or the new one isn't, then
1052 then everything is OK. */
1053 if (DECL_THIS_STATIC (olddecl) || !DECL_THIS_STATIC (newdecl))
1056 /* It's OK to declare a builtin function as `static'. */
1057 if (TREE_CODE (olddecl) == FUNCTION_DECL
1058 && DECL_ARTIFICIAL (olddecl))
1061 name = DECL_ASSEMBLER_NAME (newdecl);
1062 pedwarn ("%qD was declared %<extern%> and later %<static%>", newdecl);
1063 pedwarn ("previous declaration of %q+D", olddecl);
1066 /* NEW_DECL is a redeclaration of OLD_DECL; both are functions or
1067 function templates. If their exception specifications do not
1068 match, issue a diagnostic. */
1071 check_redeclaration_exception_specification (tree new_decl,
1076 tree new_exceptions;
1077 tree old_exceptions;
1079 new_type = TREE_TYPE (new_decl);
1080 new_exceptions = TYPE_RAISES_EXCEPTIONS (new_type);
1081 old_type = TREE_TYPE (old_decl);
1082 old_exceptions = TYPE_RAISES_EXCEPTIONS (old_type);
1086 If any declaration of a function has an exception-specification,
1087 all declarations, including the definition and an explicit
1088 specialization, of that function shall have an
1089 exception-specification with the same set of type-ids. */
1090 if ((pedantic || ! DECL_IN_SYSTEM_HEADER (old_decl))
1091 && ! DECL_IS_BUILTIN (old_decl)
1093 && !comp_except_specs (new_exceptions, old_exceptions,
1096 error ("declaration of %qF throws different exceptions", new_decl);
1097 error ("from previous declaration %q+F", old_decl);
1101 /* If NEWDECL is a redeclaration of OLDDECL, merge the declarations.
1102 If the redeclaration is invalid, a diagnostic is issued, and the
1103 error_mark_node is returned. Otherwise, OLDDECL is returned.
1105 If NEWDECL is not a redeclaration of OLDDECL, NULL_TREE is
1108 NEWDECL_IS_FRIEND is true if NEWDECL was declared as a friend. */
1111 duplicate_decls (tree newdecl, tree olddecl, bool newdecl_is_friend)
1113 unsigned olddecl_uid = DECL_UID (olddecl);
1114 int olddecl_friend = 0, types_match = 0, hidden_friend = 0;
1115 int new_defines_function = 0;
1118 if (newdecl == olddecl)
1121 types_match = decls_match (newdecl, olddecl);
1123 /* If either the type of the new decl or the type of the old decl is an
1124 error_mark_node, then that implies that we have already issued an
1125 error (earlier) for some bogus type specification, and in that case,
1126 it is rather pointless to harass the user with yet more error message
1127 about the same declaration, so just pretend the types match here. */
1128 if (TREE_TYPE (newdecl) == error_mark_node
1129 || TREE_TYPE (olddecl) == error_mark_node)
1130 return error_mark_node;
1132 if (DECL_P (olddecl)
1133 && TREE_CODE (newdecl) == FUNCTION_DECL
1134 && TREE_CODE (olddecl) == FUNCTION_DECL
1135 && (DECL_UNINLINABLE (newdecl) || DECL_UNINLINABLE (olddecl)))
1137 if (DECL_DECLARED_INLINE_P (newdecl)
1138 && DECL_UNINLINABLE (newdecl)
1139 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl)))
1140 /* Already warned elsewhere. */;
1141 else if (DECL_DECLARED_INLINE_P (olddecl)
1142 && DECL_UNINLINABLE (olddecl)
1143 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl)))
1144 /* Already warned. */;
1145 else if (DECL_DECLARED_INLINE_P (newdecl)
1146 && DECL_UNINLINABLE (olddecl)
1147 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl)))
1149 warning (OPT_Wattributes, "function %q+D redeclared as inline",
1151 warning (OPT_Wattributes, "previous declaration of %q+D "
1152 "with attribute noinline", olddecl);
1154 else if (DECL_DECLARED_INLINE_P (olddecl)
1155 && DECL_UNINLINABLE (newdecl)
1156 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl)))
1158 warning (OPT_Wattributes, "function %q+D redeclared with "
1159 "attribute noinline", newdecl);
1160 warning (OPT_Wattributes, "previous declaration of %q+D was inline",
1165 /* Check for redeclaration and other discrepancies. */
1166 if (TREE_CODE (olddecl) == FUNCTION_DECL
1167 && DECL_ARTIFICIAL (olddecl))
1169 gcc_assert (!DECL_HIDDEN_FRIEND_P (olddecl));
1170 if (TREE_CODE (newdecl) != FUNCTION_DECL)
1172 /* Avoid warnings redeclaring built-ins which have not been
1173 explicitly declared. */
1174 if (DECL_ANTICIPATED (olddecl))
1177 /* If you declare a built-in or predefined function name as static,
1178 the old definition is overridden, but optionally warn this was a
1179 bad choice of name. */
1180 if (! TREE_PUBLIC (newdecl))
1182 warning (OPT_Wshadow, "shadowing %s function %q#D",
1183 DECL_BUILT_IN (olddecl) ? "built-in" : "library",
1185 /* Discard the old built-in function. */
1188 /* If the built-in is not ansi, then programs can override
1189 it even globally without an error. */
1190 else if (! DECL_BUILT_IN (olddecl))
1191 warning (0, "library function %q#D redeclared as non-function %q#D",
1195 error ("declaration of %q#D", newdecl);
1196 error ("conflicts with built-in declaration %q#D",
1201 else if (!types_match)
1203 /* Avoid warnings redeclaring built-ins which have not been
1204 explicitly declared. */
1205 if (DECL_ANTICIPATED (olddecl))
1207 /* Deal with fileptr_type_node. FILE type is not known
1208 at the time we create the builtins. */
1211 for (t1 = TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1212 t2 = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1214 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2))
1217 else if (TREE_VALUE (t2) == fileptr_type_node)
1219 tree t = TREE_VALUE (t1);
1221 if (TREE_CODE (t) == POINTER_TYPE
1222 && TYPE_NAME (TREE_TYPE (t))
1223 && DECL_NAME (TYPE_NAME (TREE_TYPE (t)))
1224 == get_identifier ("FILE")
1225 && compparms (TREE_CHAIN (t1), TREE_CHAIN (t2)))
1227 tree oldargs = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1229 TYPE_ARG_TYPES (TREE_TYPE (olddecl))
1230 = TYPE_ARG_TYPES (TREE_TYPE (newdecl));
1231 types_match = decls_match (newdecl, olddecl);
1233 return duplicate_decls (newdecl, olddecl,
1235 TYPE_ARG_TYPES (TREE_TYPE (olddecl)) = oldargs;
1238 else if (! same_type_p (TREE_VALUE (t1), TREE_VALUE (t2)))
1241 else if ((DECL_EXTERN_C_P (newdecl)
1242 && DECL_EXTERN_C_P (olddecl))
1243 || compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1244 TYPE_ARG_TYPES (TREE_TYPE (olddecl))))
1246 /* A near match; override the builtin. */
1248 if (TREE_PUBLIC (newdecl))
1250 warning (0, "new declaration %q#D", newdecl);
1251 warning (0, "ambiguates built-in declaration %q#D",
1255 warning (OPT_Wshadow, "shadowing %s function %q#D",
1256 DECL_BUILT_IN (olddecl) ? "built-in" : "library",
1260 /* Discard the old built-in function. */
1263 /* Replace the old RTL to avoid problems with inlining. */
1264 COPY_DECL_RTL (newdecl, olddecl);
1266 /* Even if the types match, prefer the new declarations type for
1267 built-ins which have not been explicitly declared, for
1268 exception lists, etc... */
1269 else if (DECL_ANTICIPATED (olddecl))
1271 tree type = TREE_TYPE (newdecl);
1272 tree attribs = (*targetm.merge_type_attributes)
1273 (TREE_TYPE (olddecl), type);
1275 type = cp_build_type_attribute_variant (type, attribs);
1276 TREE_TYPE (newdecl) = TREE_TYPE (olddecl) = type;
1279 /* Whether or not the builtin can throw exceptions has no
1280 bearing on this declarator. */
1281 TREE_NOTHROW (olddecl) = 0;
1283 if (DECL_THIS_STATIC (newdecl) && !DECL_THIS_STATIC (olddecl))
1285 /* If a builtin function is redeclared as `static', merge
1286 the declarations, but make the original one static. */
1287 DECL_THIS_STATIC (olddecl) = 1;
1288 TREE_PUBLIC (olddecl) = 0;
1290 /* Make the old declaration consistent with the new one so
1291 that all remnants of the builtin-ness of this function
1292 will be banished. */
1293 SET_DECL_LANGUAGE (olddecl, DECL_LANGUAGE (newdecl));
1294 COPY_DECL_RTL (newdecl, olddecl);
1297 else if (TREE_CODE (olddecl) != TREE_CODE (newdecl))
1299 if ((TREE_CODE (olddecl) == TYPE_DECL && DECL_ARTIFICIAL (olddecl)
1300 && TREE_CODE (newdecl) != TYPE_DECL
1301 && ! (TREE_CODE (newdecl) == TEMPLATE_DECL
1302 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL))
1303 || (TREE_CODE (newdecl) == TYPE_DECL && DECL_ARTIFICIAL (newdecl)
1304 && TREE_CODE (olddecl) != TYPE_DECL
1305 && ! (TREE_CODE (olddecl) == TEMPLATE_DECL
1306 && (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl))
1309 /* We do nothing special here, because C++ does such nasty
1310 things with TYPE_DECLs. Instead, just let the TYPE_DECL
1311 get shadowed, and know that if we need to find a TYPE_DECL
1312 for a given name, we can look in the IDENTIFIER_TYPE_VALUE
1313 slot of the identifier. */
1317 if ((TREE_CODE (newdecl) == FUNCTION_DECL
1318 && DECL_FUNCTION_TEMPLATE_P (olddecl))
1319 || (TREE_CODE (olddecl) == FUNCTION_DECL
1320 && DECL_FUNCTION_TEMPLATE_P (newdecl)))
1323 error ("%q#D redeclared as different kind of symbol", newdecl);
1324 if (TREE_CODE (olddecl) == TREE_LIST)
1325 olddecl = TREE_VALUE (olddecl);
1326 error ("previous declaration of %q+#D", olddecl);
1328 return error_mark_node;
1330 else if (!types_match)
1332 if (CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl))
1333 /* These are certainly not duplicate declarations; they're
1334 from different scopes. */
1337 if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1339 /* The name of a class template may not be declared to refer to
1340 any other template, class, function, object, namespace, value,
1341 or type in the same scope. */
1342 if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) == TYPE_DECL
1343 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
1345 error ("declaration of template %q#D", newdecl);
1346 error ("conflicts with previous declaration %q+#D", olddecl);
1348 else if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) == FUNCTION_DECL
1349 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == FUNCTION_DECL
1350 && compparms (TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl))),
1351 TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl))))
1352 && comp_template_parms (DECL_TEMPLATE_PARMS (newdecl),
1353 DECL_TEMPLATE_PARMS (olddecl))
1354 /* Template functions can be disambiguated by
1356 && same_type_p (TREE_TYPE (TREE_TYPE (newdecl)),
1357 TREE_TYPE (TREE_TYPE (olddecl))))
1359 error ("new declaration %q#D", newdecl);
1360 error ("ambiguates old declaration %q+#D", olddecl);
1364 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1366 if (DECL_EXTERN_C_P (newdecl) && DECL_EXTERN_C_P (olddecl))
1368 error ("declaration of C function %q#D conflicts with",
1370 error ("previous declaration %q+#D here", olddecl);
1372 else if (compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1373 TYPE_ARG_TYPES (TREE_TYPE (olddecl))))
1375 error ("new declaration %q#D", newdecl);
1376 error ("ambiguates old declaration %q+#D", olddecl);
1377 return error_mark_node;
1384 error ("conflicting declaration %q#D", newdecl);
1385 error ("%q+D has a previous declaration as %q#D", olddecl, olddecl);
1386 return error_mark_node;
1389 else if (TREE_CODE (newdecl) == FUNCTION_DECL
1390 && ((DECL_TEMPLATE_SPECIALIZATION (olddecl)
1391 && (!DECL_TEMPLATE_INFO (newdecl)
1392 || (DECL_TI_TEMPLATE (newdecl)
1393 != DECL_TI_TEMPLATE (olddecl))))
1394 || (DECL_TEMPLATE_SPECIALIZATION (newdecl)
1395 && (!DECL_TEMPLATE_INFO (olddecl)
1396 || (DECL_TI_TEMPLATE (olddecl)
1397 != DECL_TI_TEMPLATE (newdecl))))))
1398 /* It's OK to have a template specialization and a non-template
1399 with the same type, or to have specializations of two
1400 different templates with the same type. Note that if one is a
1401 specialization, and the other is an instantiation of the same
1402 template, that we do not exit at this point. That situation
1403 can occur if we instantiate a template class, and then
1404 specialize one of its methods. This situation is valid, but
1405 the declarations must be merged in the usual way. */
1407 else if (TREE_CODE (newdecl) == FUNCTION_DECL
1408 && ((DECL_TEMPLATE_INSTANTIATION (olddecl)
1409 && !DECL_USE_TEMPLATE (newdecl))
1410 || (DECL_TEMPLATE_INSTANTIATION (newdecl)
1411 && !DECL_USE_TEMPLATE (olddecl))))
1412 /* One of the declarations is a template instantiation, and the
1413 other is not a template at all. That's OK. */
1415 else if (TREE_CODE (newdecl) == NAMESPACE_DECL)
1417 /* In [namespace.alias] we have:
1419 In a declarative region, a namespace-alias-definition can be
1420 used to redefine a namespace-alias declared in that declarative
1421 region to refer only to the namespace to which it already
1424 Therefore, if we encounter a second alias directive for the same
1425 alias, we can just ignore the second directive. */
1426 if (DECL_NAMESPACE_ALIAS (newdecl)
1427 && (DECL_NAMESPACE_ALIAS (newdecl)
1428 == DECL_NAMESPACE_ALIAS (olddecl)))
1430 /* [namespace.alias]
1432 A namespace-name or namespace-alias shall not be declared as
1433 the name of any other entity in the same declarative region.
1434 A namespace-name defined at global scope shall not be
1435 declared as the name of any other entity in any global scope
1437 error ("declaration of namespace %qD conflicts with", newdecl);
1438 error ("previous declaration of namespace %q+D here", olddecl);
1439 return error_mark_node;
1443 const char *errmsg = redeclaration_error_message (newdecl, olddecl);
1446 error (errmsg, newdecl);
1447 if (DECL_NAME (olddecl) != NULL_TREE)
1448 error ((DECL_INITIAL (olddecl) && namespace_bindings_p ())
1449 ? "%q+#D previously defined here"
1450 : "%q+#D previously declared here", olddecl);
1451 return error_mark_node;
1453 else if (TREE_CODE (olddecl) == FUNCTION_DECL
1454 && DECL_INITIAL (olddecl) != NULL_TREE
1455 && TYPE_ARG_TYPES (TREE_TYPE (olddecl)) == NULL_TREE
1456 && TYPE_ARG_TYPES (TREE_TYPE (newdecl)) != NULL_TREE)
1458 /* Prototype decl follows defn w/o prototype. */
1459 warning (0, "prototype for %q+#D", newdecl);
1460 warning (0, "%Jfollows non-prototype definition here", olddecl);
1462 else if ((TREE_CODE (olddecl) == FUNCTION_DECL
1463 || TREE_CODE (olddecl) == VAR_DECL)
1464 && DECL_LANGUAGE (newdecl) != DECL_LANGUAGE (olddecl))
1467 If two declarations of the same function or object
1468 specify different linkage-specifications ..., the program
1469 is ill-formed.... Except for functions with C++ linkage,
1470 a function declaration without a linkage specification
1471 shall not precede the first linkage specification for
1472 that function. A function can be declared without a
1473 linkage specification after an explicit linkage
1474 specification has been seen; the linkage explicitly
1475 specified in the earlier declaration is not affected by
1476 such a function declaration.
1478 DR 563 raises the question why the restrictions on
1479 functions should not also apply to objects. Older
1480 versions of G++ silently ignore the linkage-specification
1488 which is clearly wrong. Therefore, we now treat objects
1490 if (current_lang_depth () == 0)
1492 /* There is no explicit linkage-specification, so we use
1493 the linkage from the previous declaration. */
1494 if (!DECL_LANG_SPECIFIC (newdecl))
1495 retrofit_lang_decl (newdecl);
1496 SET_DECL_LANGUAGE (newdecl, DECL_LANGUAGE (olddecl));
1500 error ("previous declaration of %q+#D with %qL linkage",
1501 olddecl, DECL_LANGUAGE (olddecl));
1502 error ("conflicts with new declaration with %qL linkage",
1503 DECL_LANGUAGE (newdecl));
1507 if (DECL_LANG_SPECIFIC (olddecl) && DECL_USE_TEMPLATE (olddecl))
1509 else if (TREE_CODE (olddecl) == FUNCTION_DECL)
1511 tree t1 = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1512 tree t2 = TYPE_ARG_TYPES (TREE_TYPE (newdecl));
1515 if (TREE_CODE (TREE_TYPE (newdecl)) == METHOD_TYPE)
1516 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2);
1518 for (; t1 && t1 != void_list_node;
1519 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2), i++)
1520 if (TREE_PURPOSE (t1) && TREE_PURPOSE (t2))
1522 if (1 == simple_cst_equal (TREE_PURPOSE (t1),
1525 pedwarn ("default argument given for parameter %d of %q#D",
1527 pedwarn ("after previous specification in %q+#D", olddecl);
1531 error ("default argument given for parameter %d of %q#D",
1533 error ("after previous specification in %q+#D",
1538 if (DECL_DECLARED_INLINE_P (newdecl)
1539 && ! DECL_DECLARED_INLINE_P (olddecl)
1540 && TREE_ADDRESSABLE (olddecl) && warn_inline)
1542 warning (0, "%q#D was used before it was declared inline", newdecl);
1543 warning (0, "%Jprevious non-inline declaration here", olddecl);
1548 /* Do not merge an implicit typedef with an explicit one. In:
1552 typedef class A A __attribute__ ((foo));
1554 the attribute should apply only to the typedef. */
1555 if (TREE_CODE (olddecl) == TYPE_DECL
1556 && (DECL_IMPLICIT_TYPEDEF_P (olddecl)
1557 || DECL_IMPLICIT_TYPEDEF_P (newdecl)))
1560 /* If new decl is `static' and an `extern' was seen previously,
1562 warn_extern_redeclared_static (newdecl, olddecl);
1564 /* We have committed to returning 1 at this point. */
1565 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1567 /* Now that functions must hold information normally held
1568 by field decls, there is extra work to do so that
1569 declaration information does not get destroyed during
1571 if (DECL_VINDEX (olddecl))
1572 DECL_VINDEX (newdecl) = DECL_VINDEX (olddecl);
1573 if (DECL_CONTEXT (olddecl))
1574 DECL_CONTEXT (newdecl) = DECL_CONTEXT (olddecl);
1575 DECL_STATIC_CONSTRUCTOR (newdecl) |= DECL_STATIC_CONSTRUCTOR (olddecl);
1576 DECL_STATIC_DESTRUCTOR (newdecl) |= DECL_STATIC_DESTRUCTOR (olddecl);
1577 DECL_PURE_VIRTUAL_P (newdecl) |= DECL_PURE_VIRTUAL_P (olddecl);
1578 DECL_VIRTUAL_P (newdecl) |= DECL_VIRTUAL_P (olddecl);
1579 DECL_INVALID_OVERRIDER_P (newdecl) |= DECL_INVALID_OVERRIDER_P (olddecl);
1580 DECL_THIS_STATIC (newdecl) |= DECL_THIS_STATIC (olddecl);
1581 if (DECL_OVERLOADED_OPERATOR_P (olddecl) != ERROR_MARK)
1582 SET_OVERLOADED_OPERATOR_CODE
1583 (newdecl, DECL_OVERLOADED_OPERATOR_P (olddecl));
1584 new_defines_function = DECL_INITIAL (newdecl) != NULL_TREE;
1586 /* Optionally warn about more than one declaration for the same
1587 name, but don't warn about a function declaration followed by a
1589 if (warn_redundant_decls && ! DECL_ARTIFICIAL (olddecl)
1590 && !(new_defines_function && DECL_INITIAL (olddecl) == NULL_TREE)
1591 /* Don't warn about extern decl followed by definition. */
1592 && !(DECL_EXTERNAL (olddecl) && ! DECL_EXTERNAL (newdecl))
1593 /* Don't warn about friends, let add_friend take care of it. */
1594 && ! (newdecl_is_friend || DECL_FRIEND_P (olddecl)))
1596 warning (OPT_Wredundant_decls, "redundant redeclaration of %qD in same scope", newdecl);
1597 warning (OPT_Wredundant_decls, "previous declaration of %q+D", olddecl);
1601 /* Deal with C++: must preserve virtual function table size. */
1602 if (TREE_CODE (olddecl) == TYPE_DECL)
1604 tree newtype = TREE_TYPE (newdecl);
1605 tree oldtype = TREE_TYPE (olddecl);
1607 if (newtype != error_mark_node && oldtype != error_mark_node
1608 && TYPE_LANG_SPECIFIC (newtype) && TYPE_LANG_SPECIFIC (oldtype))
1609 CLASSTYPE_FRIEND_CLASSES (newtype)
1610 = CLASSTYPE_FRIEND_CLASSES (oldtype);
1612 DECL_ORIGINAL_TYPE (newdecl) = DECL_ORIGINAL_TYPE (olddecl);
1615 /* Copy all the DECL_... slots specified in the new decl
1616 except for any that we copy here from the old type. */
1617 DECL_ATTRIBUTES (newdecl)
1618 = (*targetm.merge_decl_attributes) (olddecl, newdecl);
1620 if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1624 old_result = DECL_TEMPLATE_RESULT (olddecl);
1625 new_result = DECL_TEMPLATE_RESULT (newdecl);
1626 TREE_TYPE (olddecl) = TREE_TYPE (old_result);
1627 DECL_TEMPLATE_SPECIALIZATIONS (olddecl)
1628 = chainon (DECL_TEMPLATE_SPECIALIZATIONS (olddecl),
1629 DECL_TEMPLATE_SPECIALIZATIONS (newdecl));
1631 if (DECL_FUNCTION_TEMPLATE_P (newdecl))
1633 DECL_INLINE (old_result)
1634 |= DECL_INLINE (new_result);
1635 DECL_DECLARED_INLINE_P (old_result)
1636 |= DECL_DECLARED_INLINE_P (new_result);
1637 check_redeclaration_exception_specification (newdecl, olddecl);
1640 /* If the new declaration is a definition, update the file and
1641 line information on the declaration, and also make
1642 the old declaration the same definition. */
1643 if (DECL_INITIAL (old_result) == NULL_TREE
1644 && DECL_INITIAL (new_result) != NULL_TREE)
1646 DECL_SOURCE_LOCATION (olddecl)
1647 = DECL_SOURCE_LOCATION (old_result)
1648 = DECL_SOURCE_LOCATION (newdecl);
1649 DECL_INITIAL (old_result) = DECL_INITIAL (new_result);
1650 if (DECL_FUNCTION_TEMPLATE_P (newdecl))
1651 DECL_ARGUMENTS (old_result)
1652 = DECL_ARGUMENTS (new_result);
1660 /* Automatically handles default parameters. */
1661 tree oldtype = TREE_TYPE (olddecl);
1664 /* Merge the data types specified in the two decls. */
1665 newtype = merge_types (TREE_TYPE (newdecl), TREE_TYPE (olddecl));
1667 /* If merge_types produces a non-typedef type, just use the old type. */
1668 if (TREE_CODE (newdecl) == TYPE_DECL
1669 && newtype == DECL_ORIGINAL_TYPE (newdecl))
1672 if (TREE_CODE (newdecl) == VAR_DECL)
1674 DECL_THIS_EXTERN (newdecl) |= DECL_THIS_EXTERN (olddecl);
1675 DECL_INITIALIZED_P (newdecl) |= DECL_INITIALIZED_P (olddecl);
1676 DECL_NONTRIVIALLY_INITIALIZED_P (newdecl)
1677 |= DECL_NONTRIVIALLY_INITIALIZED_P (olddecl);
1678 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (newdecl)
1679 |= DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (olddecl);
1681 /* Merge the threadprivate attribute from OLDDECL into NEWDECL. */
1682 if (DECL_LANG_SPECIFIC (olddecl)
1683 && CP_DECL_THREADPRIVATE_P (olddecl))
1685 /* Allocate a LANG_SPECIFIC structure for NEWDECL, if needed. */
1686 if (!DECL_LANG_SPECIFIC (newdecl))
1687 retrofit_lang_decl (newdecl);
1689 DECL_TLS_MODEL (newdecl) = DECL_TLS_MODEL (olddecl);
1690 CP_DECL_THREADPRIVATE_P (newdecl) = 1;
1694 /* Do this after calling `merge_types' so that default
1695 parameters don't confuse us. */
1696 else if (TREE_CODE (newdecl) == FUNCTION_DECL)
1697 check_redeclaration_exception_specification (newdecl, olddecl);
1698 TREE_TYPE (newdecl) = TREE_TYPE (olddecl) = newtype;
1700 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1701 check_default_args (newdecl);
1703 /* Lay the type out, unless already done. */
1704 if (! same_type_p (newtype, oldtype)
1705 && TREE_TYPE (newdecl) != error_mark_node
1706 && !(processing_template_decl && uses_template_parms (newdecl)))
1707 layout_type (TREE_TYPE (newdecl));
1709 if ((TREE_CODE (newdecl) == VAR_DECL
1710 || TREE_CODE (newdecl) == PARM_DECL
1711 || TREE_CODE (newdecl) == RESULT_DECL
1712 || TREE_CODE (newdecl) == FIELD_DECL
1713 || TREE_CODE (newdecl) == TYPE_DECL)
1714 && !(processing_template_decl && uses_template_parms (newdecl)))
1715 layout_decl (newdecl, 0);
1717 /* Merge the type qualifiers. */
1718 if (TREE_READONLY (newdecl))
1719 TREE_READONLY (olddecl) = 1;
1720 if (TREE_THIS_VOLATILE (newdecl))
1721 TREE_THIS_VOLATILE (olddecl) = 1;
1722 if (TREE_NOTHROW (newdecl))
1723 TREE_NOTHROW (olddecl) = 1;
1725 /* Merge deprecatedness. */
1726 if (TREE_DEPRECATED (newdecl))
1727 TREE_DEPRECATED (olddecl) = 1;
1729 /* Merge the initialization information. */
1730 if (DECL_INITIAL (newdecl) == NULL_TREE
1731 && DECL_INITIAL (olddecl) != NULL_TREE)
1733 DECL_INITIAL (newdecl) = DECL_INITIAL (olddecl);
1734 DECL_SOURCE_LOCATION (newdecl) = DECL_SOURCE_LOCATION (olddecl);
1735 if (CAN_HAVE_FULL_LANG_DECL_P (newdecl)
1736 && DECL_LANG_SPECIFIC (newdecl)
1737 && DECL_LANG_SPECIFIC (olddecl))
1739 DECL_SAVED_TREE (newdecl) = DECL_SAVED_TREE (olddecl);
1740 DECL_STRUCT_FUNCTION (newdecl) = DECL_STRUCT_FUNCTION (olddecl);
1744 /* Merge the section attribute.
1745 We want to issue an error if the sections conflict but that must be
1746 done later in decl_attributes since we are called before attributes
1748 if (DECL_SECTION_NAME (newdecl) == NULL_TREE)
1749 DECL_SECTION_NAME (newdecl) = DECL_SECTION_NAME (olddecl);
1751 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1753 DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (newdecl)
1754 |= DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (olddecl);
1755 DECL_NO_LIMIT_STACK (newdecl) |= DECL_NO_LIMIT_STACK (olddecl);
1756 TREE_THIS_VOLATILE (newdecl) |= TREE_THIS_VOLATILE (olddecl);
1757 TREE_READONLY (newdecl) |= TREE_READONLY (olddecl);
1758 TREE_NOTHROW (newdecl) |= TREE_NOTHROW (olddecl);
1759 DECL_IS_MALLOC (newdecl) |= DECL_IS_MALLOC (olddecl);
1760 DECL_IS_PURE (newdecl) |= DECL_IS_PURE (olddecl);
1761 /* Keep the old RTL. */
1762 COPY_DECL_RTL (olddecl, newdecl);
1764 else if (TREE_CODE (newdecl) == VAR_DECL
1765 && (DECL_SIZE (olddecl) || !DECL_SIZE (newdecl)))
1767 /* Keep the old RTL. We cannot keep the old RTL if the old
1768 declaration was for an incomplete object and the new
1769 declaration is not since many attributes of the RTL will
1771 COPY_DECL_RTL (olddecl, newdecl);
1774 /* If cannot merge, then use the new type and qualifiers,
1775 and don't preserve the old rtl. */
1778 /* Clean out any memory we had of the old declaration. */
1779 tree oldstatic = value_member (olddecl, static_aggregates);
1781 TREE_VALUE (oldstatic) = error_mark_node;
1783 TREE_TYPE (olddecl) = TREE_TYPE (newdecl);
1784 TREE_READONLY (olddecl) = TREE_READONLY (newdecl);
1785 TREE_THIS_VOLATILE (olddecl) = TREE_THIS_VOLATILE (newdecl);
1786 TREE_SIDE_EFFECTS (olddecl) = TREE_SIDE_EFFECTS (newdecl);
1789 /* Merge the storage class information. */
1790 merge_weak (newdecl, olddecl);
1792 DECL_ONE_ONLY (newdecl) |= DECL_ONE_ONLY (olddecl);
1793 DECL_DEFER_OUTPUT (newdecl) |= DECL_DEFER_OUTPUT (olddecl);
1794 TREE_PUBLIC (newdecl) = TREE_PUBLIC (olddecl);
1795 TREE_STATIC (olddecl) = TREE_STATIC (newdecl) |= TREE_STATIC (olddecl);
1796 if (! DECL_EXTERNAL (olddecl))
1797 DECL_EXTERNAL (newdecl) = 0;
1799 new_template = NULL_TREE;
1800 if (DECL_LANG_SPECIFIC (newdecl) && DECL_LANG_SPECIFIC (olddecl))
1802 DECL_INTERFACE_KNOWN (newdecl) |= DECL_INTERFACE_KNOWN (olddecl);
1803 DECL_NOT_REALLY_EXTERN (newdecl) |= DECL_NOT_REALLY_EXTERN (olddecl);
1804 DECL_COMDAT (newdecl) |= DECL_COMDAT (olddecl);
1805 DECL_TEMPLATE_INSTANTIATED (newdecl)
1806 |= DECL_TEMPLATE_INSTANTIATED (olddecl);
1808 /* If the OLDDECL is an instantiation and/or specialization,
1809 then the NEWDECL must be too. But, it may not yet be marked
1810 as such if the caller has created NEWDECL, but has not yet
1811 figured out that it is a redeclaration. */
1812 if (!DECL_USE_TEMPLATE (newdecl))
1813 DECL_USE_TEMPLATE (newdecl) = DECL_USE_TEMPLATE (olddecl);
1815 /* Don't really know how much of the language-specific
1816 values we should copy from old to new. */
1817 DECL_IN_AGGR_P (newdecl) = DECL_IN_AGGR_P (olddecl);
1818 DECL_LANG_SPECIFIC (newdecl)->decl_flags.u2 =
1819 DECL_LANG_SPECIFIC (olddecl)->decl_flags.u2;
1820 DECL_NONCONVERTING_P (newdecl) = DECL_NONCONVERTING_P (olddecl);
1821 DECL_REPO_AVAILABLE_P (newdecl) = DECL_REPO_AVAILABLE_P (olddecl);
1822 if (DECL_TEMPLATE_INFO (newdecl))
1823 new_template = DECL_TI_TEMPLATE (newdecl);
1824 DECL_TEMPLATE_INFO (newdecl) = DECL_TEMPLATE_INFO (olddecl);
1825 DECL_INITIALIZED_IN_CLASS_P (newdecl)
1826 |= DECL_INITIALIZED_IN_CLASS_P (olddecl);
1827 olddecl_friend = DECL_FRIEND_P (olddecl);
1828 hidden_friend = (DECL_ANTICIPATED (olddecl)
1829 && DECL_HIDDEN_FRIEND_P (olddecl)
1830 && newdecl_is_friend);
1832 /* Only functions have DECL_BEFRIENDING_CLASSES. */
1833 if (TREE_CODE (newdecl) == FUNCTION_DECL
1834 || DECL_FUNCTION_TEMPLATE_P (newdecl))
1836 DECL_BEFRIENDING_CLASSES (newdecl)
1837 = chainon (DECL_BEFRIENDING_CLASSES (newdecl),
1838 DECL_BEFRIENDING_CLASSES (olddecl));
1839 /* DECL_THUNKS is only valid for virtual functions,
1840 otherwise it is a DECL_FRIEND_CONTEXT. */
1841 if (DECL_VIRTUAL_P (newdecl))
1842 DECL_THUNKS (newdecl) = DECL_THUNKS (olddecl);
1846 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1848 if (DECL_TEMPLATE_INSTANTIATION (olddecl)
1849 && !DECL_TEMPLATE_INSTANTIATION (newdecl))
1851 /* If newdecl is not a specialization, then it is not a
1852 template-related function at all. And that means that we
1853 should have exited above, returning 0. */
1854 gcc_assert (DECL_TEMPLATE_SPECIALIZATION (newdecl));
1856 if (TREE_USED (olddecl))
1857 /* From [temp.expl.spec]:
1859 If a template, a member template or the member of a class
1860 template is explicitly specialized then that
1861 specialization shall be declared before the first use of
1862 that specialization that would cause an implicit
1863 instantiation to take place, in every translation unit in
1864 which such a use occurs. */
1865 error ("explicit specialization of %qD after first use",
1868 SET_DECL_TEMPLATE_SPECIALIZATION (olddecl);
1870 /* Don't propagate visibility from the template to the
1871 specialization here. We'll do that in determine_visibility if
1873 DECL_VISIBILITY_SPECIFIED (olddecl) = 0;
1875 /* [temp.expl.spec/14] We don't inline explicit specialization
1876 just because the primary template says so. */
1880 if (DECL_PENDING_INLINE_INFO (newdecl) == 0)
1881 DECL_PENDING_INLINE_INFO (newdecl) = DECL_PENDING_INLINE_INFO (olddecl);
1883 DECL_DECLARED_INLINE_P (newdecl) |= DECL_DECLARED_INLINE_P (olddecl);
1885 /* If either decl says `inline', this fn is inline, unless
1886 its definition was passed already. */
1887 if (DECL_INLINE (newdecl) && DECL_INITIAL (olddecl) == NULL_TREE)
1888 DECL_INLINE (olddecl) = 1;
1889 DECL_INLINE (newdecl) = DECL_INLINE (olddecl);
1891 DECL_UNINLINABLE (newdecl) = DECL_UNINLINABLE (olddecl)
1892 = (DECL_UNINLINABLE (newdecl) || DECL_UNINLINABLE (olddecl));
1895 /* Preserve abstractness on cloned [cd]tors. */
1896 DECL_ABSTRACT (newdecl) = DECL_ABSTRACT (olddecl);
1900 SET_DECL_LANGUAGE (olddecl, DECL_LANGUAGE (newdecl));
1901 COPY_DECL_ASSEMBLER_NAME (newdecl, olddecl);
1902 COPY_DECL_RTL (newdecl, olddecl);
1904 if (! types_match || new_defines_function)
1906 /* These need to be copied so that the names are available.
1907 Note that if the types do match, we'll preserve inline
1908 info and other bits, but if not, we won't. */
1909 DECL_ARGUMENTS (olddecl) = DECL_ARGUMENTS (newdecl);
1910 DECL_RESULT (olddecl) = DECL_RESULT (newdecl);
1912 if (new_defines_function)
1913 /* If defining a function declared with other language
1914 linkage, use the previously declared language linkage. */
1915 SET_DECL_LANGUAGE (newdecl, DECL_LANGUAGE (olddecl));
1916 else if (types_match)
1918 /* If redeclaring a builtin function, and not a definition,
1919 it stays built in. */
1920 if (DECL_BUILT_IN (olddecl))
1922 DECL_BUILT_IN_CLASS (newdecl) = DECL_BUILT_IN_CLASS (olddecl);
1923 DECL_FUNCTION_CODE (newdecl) = DECL_FUNCTION_CODE (olddecl);
1924 /* If we're keeping the built-in definition, keep the rtl,
1925 regardless of declaration matches. */
1926 COPY_DECL_RTL (olddecl, newdecl);
1929 DECL_RESULT (newdecl) = DECL_RESULT (olddecl);
1930 /* Don't clear out the arguments if we're redefining a function. */
1931 if (DECL_ARGUMENTS (olddecl))
1932 DECL_ARGUMENTS (newdecl) = DECL_ARGUMENTS (olddecl);
1935 else if (TREE_CODE (newdecl) == NAMESPACE_DECL)
1936 NAMESPACE_LEVEL (newdecl) = NAMESPACE_LEVEL (olddecl);
1938 /* Now preserve various other info from the definition. */
1939 TREE_ADDRESSABLE (newdecl) = TREE_ADDRESSABLE (olddecl);
1940 TREE_ASM_WRITTEN (newdecl) = TREE_ASM_WRITTEN (olddecl);
1941 DECL_COMMON (newdecl) = DECL_COMMON (olddecl);
1942 COPY_DECL_ASSEMBLER_NAME (olddecl, newdecl);
1944 /* Warn about conflicting visibility specifications. */
1945 if (DECL_VISIBILITY_SPECIFIED (olddecl)
1946 && DECL_VISIBILITY_SPECIFIED (newdecl)
1947 && DECL_VISIBILITY (newdecl) != DECL_VISIBILITY (olddecl))
1949 warning (OPT_Wattributes, "%q+D: visibility attribute ignored "
1950 "because it", newdecl);
1951 warning (OPT_Wattributes, "%Jconflicts with previous "
1952 "declaration here", olddecl);
1954 /* Choose the declaration which specified visibility. */
1955 if (DECL_VISIBILITY_SPECIFIED (olddecl))
1957 DECL_VISIBILITY (newdecl) = DECL_VISIBILITY (olddecl);
1958 DECL_VISIBILITY_SPECIFIED (newdecl) = 1;
1960 /* Init priority used to be merged from newdecl to olddecl by the memcpy,
1961 so keep this behavior. */
1962 if (TREE_CODE (newdecl) == VAR_DECL && DECL_HAS_INIT_PRIORITY_P (newdecl))
1964 SET_DECL_INIT_PRIORITY (olddecl, DECL_INIT_PRIORITY (newdecl));
1965 DECL_HAS_INIT_PRIORITY_P (olddecl) = 1;
1968 /* The DECL_LANG_SPECIFIC information in OLDDECL will be replaced
1969 with that from NEWDECL below. */
1970 if (DECL_LANG_SPECIFIC (olddecl))
1972 gcc_assert (DECL_LANG_SPECIFIC (olddecl)
1973 != DECL_LANG_SPECIFIC (newdecl));
1974 ggc_free (DECL_LANG_SPECIFIC (olddecl));
1977 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1981 function_size = sizeof (struct tree_decl_common);
1983 memcpy ((char *) olddecl + sizeof (struct tree_common),
1984 (char *) newdecl + sizeof (struct tree_common),
1985 function_size - sizeof (struct tree_common));
1987 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
1988 (char *) newdecl + sizeof (struct tree_decl_common),
1989 sizeof (struct tree_function_decl) - sizeof (struct tree_decl_common));
1991 /* If newdecl is a template instantiation, it is possible that
1992 the following sequence of events has occurred:
1994 o A friend function was declared in a class template. The
1995 class template was instantiated.
1997 o The instantiation of the friend declaration was
1998 recorded on the instantiation list, and is newdecl.
2000 o Later, however, instantiate_class_template called pushdecl
2001 on the newdecl to perform name injection. But, pushdecl in
2002 turn called duplicate_decls when it discovered that another
2003 declaration of a global function with the same name already
2006 o Here, in duplicate_decls, we decided to clobber newdecl.
2008 If we're going to do that, we'd better make sure that
2009 olddecl, and not newdecl, is on the list of
2010 instantiations so that if we try to do the instantiation
2011 again we won't get the clobbered declaration. */
2012 reregister_specialization (newdecl,
2018 size_t size = tree_code_size (TREE_CODE (olddecl));
2019 memcpy ((char *) olddecl + sizeof (struct tree_common),
2020 (char *) newdecl + sizeof (struct tree_common),
2021 sizeof (struct tree_decl_common) - sizeof (struct tree_common));
2022 switch (TREE_CODE (olddecl))
2032 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
2033 (char *) newdecl + sizeof (struct tree_decl_common),
2034 size - sizeof (struct tree_decl_common)
2035 + TREE_CODE_LENGTH (TREE_CODE (newdecl)) * sizeof (char *));
2039 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
2040 (char *) newdecl + sizeof (struct tree_decl_common),
2041 sizeof (struct tree_decl_non_common) - sizeof (struct tree_decl_common)
2042 + TREE_CODE_LENGTH (TREE_CODE (newdecl)) * sizeof (char *));
2046 DECL_UID (olddecl) = olddecl_uid;
2048 DECL_FRIEND_P (olddecl) = 1;
2051 DECL_ANTICIPATED (olddecl) = 1;
2052 DECL_HIDDEN_FRIEND_P (olddecl) = 1;
2055 /* NEWDECL contains the merged attribute lists.
2056 Update OLDDECL to be the same. */
2057 DECL_ATTRIBUTES (olddecl) = DECL_ATTRIBUTES (newdecl);
2059 /* If OLDDECL had its DECL_RTL instantiated, re-invoke make_decl_rtl
2060 so that encode_section_info has a chance to look at the new decl
2061 flags and attributes. */
2062 if (DECL_RTL_SET_P (olddecl)
2063 && (TREE_CODE (olddecl) == FUNCTION_DECL
2064 || (TREE_CODE (olddecl) == VAR_DECL
2065 && TREE_STATIC (olddecl))))
2066 make_decl_rtl (olddecl);
2068 /* The NEWDECL will no longer be needed. Because every out-of-class
2069 declaration of a member results in a call to duplicate_decls,
2070 freeing these nodes represents in a significant savings. */
2076 /* Return zero if the declaration NEWDECL is valid
2077 when the declaration OLDDECL (assumed to be for the same name)
2078 has already been seen.
2079 Otherwise return an error message format string with a %s
2080 where the identifier should go. */
2083 redeclaration_error_message (tree newdecl, tree olddecl)
2085 if (TREE_CODE (newdecl) == TYPE_DECL)
2087 /* Because C++ can put things into name space for free,
2088 constructs like "typedef struct foo { ... } foo"
2089 would look like an erroneous redeclaration. */
2090 if (same_type_p (TREE_TYPE (newdecl), TREE_TYPE (olddecl)))
2093 return "redefinition of %q#D";
2095 else if (TREE_CODE (newdecl) == FUNCTION_DECL)
2097 /* If this is a pure function, its olddecl will actually be
2098 the original initialization to `0' (which we force to call
2099 abort()). Don't complain about redefinition in this case. */
2100 if (DECL_LANG_SPECIFIC (olddecl) && DECL_PURE_VIRTUAL_P (olddecl)
2101 && DECL_INITIAL (olddecl) == NULL_TREE)
2104 /* If both functions come from different namespaces, this is not
2105 a redeclaration - this is a conflict with a used function. */
2106 if (DECL_NAMESPACE_SCOPE_P (olddecl)
2107 && DECL_CONTEXT (olddecl) != DECL_CONTEXT (newdecl)
2108 && ! decls_match (olddecl, newdecl))
2109 return "%qD conflicts with used function";
2111 /* We'll complain about linkage mismatches in
2112 warn_extern_redeclared_static. */
2114 /* Defining the same name twice is no good. */
2115 if (DECL_INITIAL (olddecl) != NULL_TREE
2116 && DECL_INITIAL (newdecl) != NULL_TREE)
2118 if (DECL_NAME (olddecl) == NULL_TREE)
2119 return "%q#D not declared in class";
2121 return "redefinition of %q#D";
2125 else if (TREE_CODE (newdecl) == TEMPLATE_DECL)
2129 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
2131 if (COMPLETE_TYPE_P (TREE_TYPE (newdecl))
2132 && COMPLETE_TYPE_P (TREE_TYPE (olddecl)))
2133 return "redefinition of %q#D";
2137 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) != FUNCTION_DECL
2138 || (DECL_TEMPLATE_RESULT (newdecl)
2139 == DECL_TEMPLATE_RESULT (olddecl)))
2142 nt = DECL_TEMPLATE_RESULT (newdecl);
2143 if (DECL_TEMPLATE_INFO (nt))
2144 nt = DECL_TEMPLATE_RESULT (template_for_substitution (nt));
2145 ot = DECL_TEMPLATE_RESULT (olddecl);
2146 if (DECL_TEMPLATE_INFO (ot))
2147 ot = DECL_TEMPLATE_RESULT (template_for_substitution (ot));
2148 if (DECL_INITIAL (nt) && DECL_INITIAL (ot))
2149 return "redefinition of %q#D";
2151 /* Core issue #226 (C++0x):
2153 If a friend function template declaration specifies a
2154 default template-argument, that declaration shall be a
2155 definition and shall be the only declaration of the
2156 function template in the translation unit. */
2158 && TREE_CODE (ot) == FUNCTION_DECL && DECL_FRIEND_P (ot)
2159 && !check_default_tmpl_args (nt, DECL_TEMPLATE_PARMS (newdecl),
2160 /*is_primary=*/1, /*is_partial=*/0,
2161 /*is_friend_decl=*/2))
2162 return "redeclaration of friend %q#D may not have default template arguments";
2166 else if (TREE_CODE (newdecl) == VAR_DECL
2167 && DECL_THREAD_LOCAL_P (newdecl) != DECL_THREAD_LOCAL_P (olddecl)
2168 && (! DECL_LANG_SPECIFIC (olddecl)
2169 || ! CP_DECL_THREADPRIVATE_P (olddecl)
2170 || DECL_THREAD_LOCAL_P (newdecl)))
2172 /* Only variables can be thread-local, and all declarations must
2173 agree on this property. */
2174 if (DECL_THREAD_LOCAL_P (newdecl))
2175 return "thread-local declaration of %q#D follows "
2176 "non-thread-local declaration";
2178 return "non-thread-local declaration of %q#D follows "
2179 "thread-local declaration";
2181 else if (toplevel_bindings_p () || DECL_NAMESPACE_SCOPE_P (newdecl))
2183 /* Objects declared at top level: */
2184 /* If at least one is a reference, it's ok. */
2185 if (DECL_EXTERNAL (newdecl) || DECL_EXTERNAL (olddecl))
2187 /* Reject two definitions. */
2188 return "redefinition of %q#D";
2192 /* Objects declared with block scope: */
2193 /* Reject two definitions, and reject a definition
2194 together with an external reference. */
2195 if (!(DECL_EXTERNAL (newdecl) && DECL_EXTERNAL (olddecl)))
2196 return "redeclaration of %q#D";
2201 /* Hash and equality functions for the named_label table. */
2204 named_label_entry_hash (const void *data)
2206 const struct named_label_entry *ent = (const struct named_label_entry *) data;
2207 return DECL_UID (ent->label_decl);
2211 named_label_entry_eq (const void *a, const void *b)
2213 const struct named_label_entry *ent_a = (const struct named_label_entry *) a;
2214 const struct named_label_entry *ent_b = (const struct named_label_entry *) b;
2215 return ent_a->label_decl == ent_b->label_decl;
2218 /* Create a new label, named ID. */
2221 make_label_decl (tree id, int local_p)
2223 struct named_label_entry *ent;
2227 decl = build_decl (LABEL_DECL, id, void_type_node);
2229 DECL_CONTEXT (decl) = current_function_decl;
2230 DECL_MODE (decl) = VOIDmode;
2231 C_DECLARED_LABEL_FLAG (decl) = local_p;
2233 /* Say where one reference is to the label, for the sake of the
2234 error if it is not defined. */
2235 DECL_SOURCE_LOCATION (decl) = input_location;
2237 /* Record the fact that this identifier is bound to this label. */
2238 SET_IDENTIFIER_LABEL_VALUE (id, decl);
2240 /* Create the label htab for the function on demand. */
2242 named_labels = htab_create_ggc (13, named_label_entry_hash,
2243 named_label_entry_eq, NULL);
2245 /* Record this label on the list of labels used in this function.
2246 We do this before calling make_label_decl so that we get the
2247 IDENTIFIER_LABEL_VALUE before the new label is declared. */
2248 ent = GGC_CNEW (struct named_label_entry);
2249 ent->label_decl = decl;
2251 slot = htab_find_slot (named_labels, ent, INSERT);
2252 gcc_assert (*slot == NULL);
2258 /* Look for a label named ID in the current function. If one cannot
2259 be found, create one. (We keep track of used, but undefined,
2260 labels, and complain about them at the end of a function.) */
2263 lookup_label (tree id)
2267 timevar_push (TV_NAME_LOOKUP);
2268 /* You can't use labels at global scope. */
2269 if (current_function_decl == NULL_TREE)
2271 error ("label %qE referenced outside of any function", id);
2272 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, NULL_TREE);
2275 /* See if we've already got this label. */
2276 decl = IDENTIFIER_LABEL_VALUE (id);
2277 if (decl != NULL_TREE && DECL_CONTEXT (decl) == current_function_decl)
2278 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2280 decl = make_label_decl (id, /*local_p=*/0);
2281 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2284 /* Declare a local label named ID. */
2287 declare_local_label (tree id)
2291 /* Add a new entry to the SHADOWED_LABELS list so that when we leave
2292 this scope we can restore the old value of IDENTIFIER_TYPE_VALUE. */
2293 shadow = tree_cons (IDENTIFIER_LABEL_VALUE (id), NULL_TREE,
2294 current_binding_level->shadowed_labels);
2295 current_binding_level->shadowed_labels = shadow;
2297 decl = make_label_decl (id, /*local_p=*/1);
2298 TREE_VALUE (shadow) = decl;
2303 /* Returns nonzero if it is ill-formed to jump past the declaration of
2304 DECL. Returns 2 if it's also a real problem. */
2307 decl_jump_unsafe (tree decl)
2309 if (TREE_CODE (decl) != VAR_DECL || TREE_STATIC (decl)
2310 || TREE_TYPE (decl) == error_mark_node)
2313 if (TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl))
2314 || DECL_NONTRIVIALLY_INITIALIZED_P (decl))
2317 if (pod_type_p (TREE_TYPE (decl)))
2320 /* The POD stuff is just pedantry; why should it matter if the class
2321 contains a field of pointer to member type? */
2325 /* A subroutine of check_previous_goto_1 to identify a branch to the user. */
2328 identify_goto (tree decl, const location_t *locus)
2331 pedwarn ("jump to label %qD", decl);
2333 pedwarn ("jump to case label");
2335 pedwarn ("%H from here", locus);
2338 /* Check that a single previously seen jump to a newly defined label
2339 is OK. DECL is the LABEL_DECL or 0; LEVEL is the binding_level for
2340 the jump context; NAMES are the names in scope in LEVEL at the jump
2341 context; LOCUS is the source position of the jump or 0. Returns
2342 true if all is well. */
2345 check_previous_goto_1 (tree decl, struct cp_binding_level* level, tree names,
2346 bool exited_omp, const location_t *locus)
2348 struct cp_binding_level *b;
2349 bool identified = false, saw_eh = false, saw_omp = false;
2353 identify_goto (decl, locus);
2354 error (" exits OpenMP structured block");
2355 identified = saw_omp = true;
2358 for (b = current_binding_level; b ; b = b->level_chain)
2360 tree new_decls, old_decls = (b == level ? names : NULL_TREE);
2362 for (new_decls = b->names; new_decls != old_decls;
2363 new_decls = TREE_CHAIN (new_decls))
2365 int problem = decl_jump_unsafe (new_decls);
2371 identify_goto (decl, locus);
2375 error (" crosses initialization of %q+#D", new_decls);
2377 pedwarn (" enters scope of non-POD %q+#D", new_decls);
2382 if ((b->kind == sk_try || b->kind == sk_catch) && !saw_eh)
2386 identify_goto (decl, locus);
2389 if (b->kind == sk_try)
2390 error (" enters try block");
2392 error (" enters catch block");
2395 if (b->kind == sk_omp && !saw_omp)
2399 identify_goto (decl, locus);
2402 error (" enters OpenMP structured block");
2411 check_previous_goto (tree decl, struct named_label_use_entry *use)
2413 check_previous_goto_1 (decl, use->binding_level,
2414 use->names_in_scope, use->in_omp_scope,
2415 &use->o_goto_locus);
2419 check_switch_goto (struct cp_binding_level* level)
2421 return check_previous_goto_1 (NULL_TREE, level, level->names, false, NULL);
2424 /* Check that a new jump to a label DECL is OK. Called by
2425 finish_goto_stmt. */
2428 check_goto (tree decl)
2430 struct named_label_entry *ent, dummy;
2431 bool saw_catch = false, identified = false;
2434 /* We can't know where a computed goto is jumping.
2435 So we assume that it's OK. */
2436 if (TREE_CODE (decl) != LABEL_DECL)
2439 /* We didn't record any information about this label when we created it,
2440 and there's not much point since it's trivial to analyze as a return. */
2441 if (decl == cdtor_label)
2444 dummy.label_decl = decl;
2445 ent = (struct named_label_entry *) htab_find (named_labels, &dummy);
2446 gcc_assert (ent != NULL);
2448 /* If the label hasn't been defined yet, defer checking. */
2449 if (! DECL_INITIAL (decl))
2451 struct named_label_use_entry *new_use;
2453 /* Don't bother creating another use if the last goto had the
2454 same data, and will therefore create the same set of errors. */
2456 && ent->uses->names_in_scope == current_binding_level->names)
2459 new_use = GGC_NEW (struct named_label_use_entry);
2460 new_use->binding_level = current_binding_level;
2461 new_use->names_in_scope = current_binding_level->names;
2462 new_use->o_goto_locus = input_location;
2463 new_use->in_omp_scope = false;
2465 new_use->next = ent->uses;
2466 ent->uses = new_use;
2470 if (ent->in_try_scope || ent->in_catch_scope
2471 || ent->in_omp_scope || ent->bad_decls)
2473 pedwarn ("jump to label %q+D", decl);
2474 pedwarn (" from here");
2478 for (bad = ent->bad_decls; bad; bad = TREE_CHAIN (bad))
2480 tree b = TREE_VALUE (bad);
2481 int u = decl_jump_unsafe (b);
2483 if (u > 1 && DECL_ARTIFICIAL (b))
2485 /* Can't skip init of __exception_info. */
2486 error ("%J enters catch block", b);
2490 error (" skips initialization of %q+#D", b);
2492 pedwarn (" enters scope of non-POD %q+#D", b);
2495 if (ent->in_try_scope)
2496 error (" enters try block");
2497 else if (ent->in_catch_scope && !saw_catch)
2498 error (" enters catch block");
2500 if (ent->in_omp_scope)
2501 error (" enters OpenMP structured block");
2502 else if (flag_openmp)
2504 struct cp_binding_level *b;
2505 for (b = current_binding_level; b ; b = b->level_chain)
2507 if (b == ent->binding_level)
2509 if (b->kind == sk_omp)
2513 pedwarn ("jump to label %q+D", decl);
2514 pedwarn (" from here");
2517 error (" exits OpenMP structured block");
2524 /* Check that a return is ok wrt OpenMP structured blocks.
2525 Called by finish_return_stmt. Returns true if all is well. */
2528 check_omp_return (void)
2530 struct cp_binding_level *b;
2531 for (b = current_binding_level; b ; b = b->level_chain)
2532 if (b->kind == sk_omp)
2534 error ("invalid exit from OpenMP structured block");
2540 /* Define a label, specifying the location in the source file.
2541 Return the LABEL_DECL node for the label. */
2544 define_label (location_t location, tree name)
2546 struct named_label_entry *ent, dummy;
2547 struct cp_binding_level *p;
2550 timevar_push (TV_NAME_LOOKUP);
2552 decl = lookup_label (name);
2554 dummy.label_decl = decl;
2555 ent = (struct named_label_entry *) htab_find (named_labels, &dummy);
2556 gcc_assert (ent != NULL);
2558 /* After labels, make any new cleanups in the function go into their
2559 own new (temporary) binding contour. */
2560 for (p = current_binding_level;
2561 p->kind != sk_function_parms;
2563 p->more_cleanups_ok = 0;
2565 if (name == get_identifier ("wchar_t"))
2566 pedwarn ("label named wchar_t");
2568 if (DECL_INITIAL (decl) != NULL_TREE)
2570 error ("duplicate label %qD", decl);
2571 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
2575 struct named_label_use_entry *use;
2577 /* Mark label as having been defined. */
2578 DECL_INITIAL (decl) = error_mark_node;
2579 /* Say where in the source. */
2580 DECL_SOURCE_LOCATION (decl) = location;
2582 ent->binding_level = current_binding_level;
2583 ent->names_in_scope = current_binding_level->names;
2585 for (use = ent->uses; use ; use = use->next)
2586 check_previous_goto (decl, use);
2590 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2595 struct cp_binding_level *level;
2596 struct cp_switch *next;
2597 /* The SWITCH_STMT being built. */
2599 /* A splay-tree mapping the low element of a case range to the high
2600 element, or NULL_TREE if there is no high element. Used to
2601 determine whether or not a new case label duplicates an old case
2602 label. We need a tree, rather than simply a hash table, because
2603 of the GNU case range extension. */
2607 /* A stack of the currently active switch statements. The innermost
2608 switch statement is on the top of the stack. There is no need to
2609 mark the stack for garbage collection because it is only active
2610 during the processing of the body of a function, and we never
2611 collect at that point. */
2613 static struct cp_switch *switch_stack;
2615 /* Called right after a switch-statement condition is parsed.
2616 SWITCH_STMT is the switch statement being parsed. */
2619 push_switch (tree switch_stmt)
2621 struct cp_switch *p = XNEW (struct cp_switch);
2622 p->level = current_binding_level;
2623 p->next = switch_stack;
2624 p->switch_stmt = switch_stmt;
2625 p->cases = splay_tree_new (case_compare, NULL, NULL);
2632 struct cp_switch *cs = switch_stack;
2633 location_t switch_location;
2635 /* Emit warnings as needed. */
2636 if (EXPR_HAS_LOCATION (cs->switch_stmt))
2637 switch_location = EXPR_LOCATION (cs->switch_stmt);
2639 switch_location = input_location;
2640 if (!processing_template_decl)
2641 c_do_switch_warnings (cs->cases, switch_location,
2642 SWITCH_STMT_TYPE (cs->switch_stmt),
2643 SWITCH_STMT_COND (cs->switch_stmt));
2645 splay_tree_delete (cs->cases);
2646 switch_stack = switch_stack->next;
2650 /* Note that we've seen a definition of a case label, and complain if this
2651 is a bad place for one. */
2654 finish_case_label (tree low_value, tree high_value)
2657 struct cp_binding_level *p;
2659 if (processing_template_decl)
2663 /* For templates, just add the case label; we'll do semantic
2664 analysis at instantiation-time. */
2665 label = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
2666 return add_stmt (build_case_label (low_value, high_value, label));
2669 /* Find the condition on which this switch statement depends. */
2670 cond = SWITCH_STMT_COND (switch_stack->switch_stmt);
2671 if (cond && TREE_CODE (cond) == TREE_LIST)
2672 cond = TREE_VALUE (cond);
2674 if (!check_switch_goto (switch_stack->level))
2675 return error_mark_node;
2677 r = c_add_case_label (switch_stack->cases, cond, TREE_TYPE (cond),
2678 low_value, high_value);
2680 /* After labels, make any new cleanups in the function go into their
2681 own new (temporary) binding contour. */
2682 for (p = current_binding_level;
2683 p->kind != sk_function_parms;
2685 p->more_cleanups_ok = 0;
2690 /* Hash a TYPENAME_TYPE. K is really of type `tree'. */
2693 typename_hash (const void* k)
2698 hash = (htab_hash_pointer (TYPE_CONTEXT (t))
2699 ^ htab_hash_pointer (DECL_NAME (TYPE_NAME (t))));
2704 typedef struct typename_info {
2712 /* Compare two TYPENAME_TYPEs. K1 is really of type `tree', K2 is
2713 really of type `typename_info*' */
2716 typename_compare (const void * k1, const void * k2)
2719 const typename_info *t2;
2722 t2 = (const typename_info *) k2;
2724 return (DECL_NAME (TYPE_NAME (t1)) == t2->name
2725 && TYPE_CONTEXT (t1) == t2->scope
2726 && TYPENAME_TYPE_FULLNAME (t1) == t2->template_id
2727 && TYPENAME_IS_ENUM_P (t1) == t2->enum_p
2728 && TYPENAME_IS_CLASS_P (t1) == t2->class_p);
2731 /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
2732 the type of `T', NAME is the IDENTIFIER_NODE for `t'.
2734 Returns the new TYPENAME_TYPE. */
2736 static GTY ((param_is (union tree_node))) htab_t typename_htab;
2739 build_typename_type (tree context, tree name, tree fullname,
2740 enum tag_types tag_type)
2748 if (typename_htab == NULL)
2749 typename_htab = htab_create_ggc (61, &typename_hash,
2750 &typename_compare, NULL);
2752 ti.scope = FROB_CONTEXT (context);
2754 ti.template_id = fullname;
2755 ti.enum_p = tag_type == enum_type;
2756 ti.class_p = (tag_type == class_type
2757 || tag_type == record_type
2758 || tag_type == union_type);
2759 hash = (htab_hash_pointer (ti.scope)
2760 ^ htab_hash_pointer (ti.name));
2762 /* See if we already have this type. */
2763 e = htab_find_slot_with_hash (typename_htab, &ti, hash, INSERT);
2768 /* Build the TYPENAME_TYPE. */
2769 t = make_aggr_type (TYPENAME_TYPE);
2770 TYPE_CONTEXT (t) = ti.scope;
2771 TYPENAME_TYPE_FULLNAME (t) = ti.template_id;
2772 TYPENAME_IS_ENUM_P (t) = ti.enum_p;
2773 TYPENAME_IS_CLASS_P (t) = ti.class_p;
2775 /* Build the corresponding TYPE_DECL. */
2776 d = build_decl (TYPE_DECL, name, t);
2777 TYPE_NAME (TREE_TYPE (d)) = d;
2778 TYPE_STUB_DECL (TREE_TYPE (d)) = d;
2779 DECL_CONTEXT (d) = FROB_CONTEXT (context);
2780 DECL_ARTIFICIAL (d) = 1;
2782 /* Store it in the hash table. */
2785 /* TYPENAME_TYPEs must always be compared structurally, because
2786 they may or may not resolve down to another type depending on
2787 the currently open classes. */
2788 SET_TYPE_STRUCTURAL_EQUALITY (t);
2794 /* Resolve `typename CONTEXT::NAME'. TAG_TYPE indicates the tag
2795 provided to name the type. Returns an appropriate type, unless an
2796 error occurs, in which case error_mark_node is returned. If we
2797 locate a non-artificial TYPE_DECL and TF_KEEP_TYPE_DECL is set, we
2798 return that, rather than the _TYPE it corresponds to, in other
2799 cases we look through the type decl. If TF_ERROR is set, complain
2800 about errors, otherwise be quiet. */
2803 make_typename_type (tree context, tree name, enum tag_types tag_type,
2804 tsubst_flags_t complain)
2810 if (name == error_mark_node
2811 || context == NULL_TREE
2812 || context == error_mark_node)
2813 return error_mark_node;
2817 if (!(TYPE_LANG_SPECIFIC (name)
2818 && (CLASSTYPE_IS_TEMPLATE (name)
2819 || CLASSTYPE_USE_TEMPLATE (name))))
2820 name = TYPE_IDENTIFIER (name);
2822 /* Create a TEMPLATE_ID_EXPR for the type. */
2823 name = build_nt (TEMPLATE_ID_EXPR,
2824 CLASSTYPE_TI_TEMPLATE (name),
2825 CLASSTYPE_TI_ARGS (name));
2827 else if (TREE_CODE (name) == TYPE_DECL)
2828 name = DECL_NAME (name);
2832 if (TREE_CODE (name) == TEMPLATE_ID_EXPR)
2834 name = TREE_OPERAND (name, 0);
2835 if (TREE_CODE (name) == TEMPLATE_DECL)
2836 name = TREE_OPERAND (fullname, 0) = DECL_NAME (name);
2837 else if (TREE_CODE (name) == OVERLOAD)
2839 error ("%qD is not a type", name);
2840 return error_mark_node;
2843 if (TREE_CODE (name) == TEMPLATE_DECL)
2845 error ("%qD used without template parameters", name);
2846 return error_mark_node;
2848 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
2849 gcc_assert (TYPE_P (context));
2851 /* When the CONTEXT is a dependent type, NAME could refer to a
2852 dependent base class of CONTEXT. So we cannot peek inside it,
2853 even if CONTEXT is a currently open scope. */
2854 if (dependent_type_p (context))
2855 return build_typename_type (context, name, fullname, tag_type);
2857 if (!IS_AGGR_TYPE (context))
2859 if (complain & tf_error)
2860 error ("%q#T is not a class", context);
2861 return error_mark_node;
2864 want_template = TREE_CODE (fullname) == TEMPLATE_ID_EXPR;
2866 /* We should only set WANT_TYPE when we're a nested typename type.
2867 Then we can give better diagnostics if we find a non-type. */
2868 t = lookup_field (context, name, 0, /*want_type=*/true);
2871 if (complain & tf_error)
2872 error (want_template ? "no class template named %q#T in %q#T"
2873 : "no type named %q#T in %q#T", name, context);
2874 return error_mark_node;
2877 if (want_template && !DECL_CLASS_TEMPLATE_P (t))
2879 if (complain & tf_error)
2880 error ("%<typename %T::%D%> names %q#T, which is not a class template",
2882 return error_mark_node;
2884 if (!want_template && TREE_CODE (t) != TYPE_DECL)
2886 if (complain & tf_error)
2887 error ("%<typename %T::%D%> names %q#T, which is not a type",
2889 return error_mark_node;
2892 if (complain & tf_error)
2893 perform_or_defer_access_check (TYPE_BINFO (context), t, t);
2896 return lookup_template_class (t, TREE_OPERAND (fullname, 1),
2898 /*entering_scope=*/0,
2899 tf_warning_or_error | tf_user);
2901 if (DECL_ARTIFICIAL (t) || !(complain & tf_keep_type_decl))
2907 /* Resolve `CONTEXT::template NAME'. Returns a TEMPLATE_DECL if the name
2908 can be resolved or an UNBOUND_CLASS_TEMPLATE, unless an error occurs,
2909 in which case error_mark_node is returned.
2911 If PARM_LIST is non-NULL, also make sure that the template parameter
2912 list of TEMPLATE_DECL matches.
2914 If COMPLAIN zero, don't complain about any errors that occur. */
2917 make_unbound_class_template (tree context, tree name, tree parm_list,
2918 tsubst_flags_t complain)
2924 name = TYPE_IDENTIFIER (name);
2925 else if (DECL_P (name))
2926 name = DECL_NAME (name);
2927 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
2929 if (!dependent_type_p (context)
2930 || currently_open_class (context))
2932 tree tmpl = NULL_TREE;
2934 if (IS_AGGR_TYPE (context))
2935 tmpl = lookup_field (context, name, 0, false);
2937 if (!tmpl || !DECL_CLASS_TEMPLATE_P (tmpl))
2939 if (complain & tf_error)
2940 error ("no class template named %q#T in %q#T", name, context);
2941 return error_mark_node;
2945 && !comp_template_parms (DECL_TEMPLATE_PARMS (tmpl), parm_list))
2947 if (complain & tf_error)
2949 error ("template parameters do not match template");
2950 error ("%q+D declared here", tmpl);
2952 return error_mark_node;
2955 if (complain & tf_error)
2956 perform_or_defer_access_check (TYPE_BINFO (context), tmpl, tmpl);
2961 /* Build the UNBOUND_CLASS_TEMPLATE. */
2962 t = make_aggr_type (UNBOUND_CLASS_TEMPLATE);
2963 TYPE_CONTEXT (t) = FROB_CONTEXT (context);
2964 TREE_TYPE (t) = NULL_TREE;
2965 SET_TYPE_STRUCTURAL_EQUALITY (t);
2967 /* Build the corresponding TEMPLATE_DECL. */
2968 d = build_decl (TEMPLATE_DECL, name, t);
2969 TYPE_NAME (TREE_TYPE (d)) = d;
2970 TYPE_STUB_DECL (TREE_TYPE (d)) = d;
2971 DECL_CONTEXT (d) = FROB_CONTEXT (context);
2972 DECL_ARTIFICIAL (d) = 1;
2973 DECL_TEMPLATE_PARMS (d) = parm_list;
2980 /* Push the declarations of builtin types into the namespace.
2981 RID_INDEX is the index of the builtin type in the array
2982 RID_POINTERS. NAME is the name used when looking up the builtin
2983 type. TYPE is the _TYPE node for the builtin type. */
2986 record_builtin_type (enum rid rid_index,
2990 tree rname = NULL_TREE, tname = NULL_TREE;
2991 tree tdecl = NULL_TREE;
2993 if ((int) rid_index < (int) RID_MAX)
2994 rname = ridpointers[(int) rid_index];
2996 tname = get_identifier (name);
2998 /* The calls to SET_IDENTIFIER_GLOBAL_VALUE below should be
2999 eliminated. Built-in types should not be looked up name; their
3000 names are keywords that the parser can recognize. However, there
3001 is code in c-common.c that uses identifier_global_value to look
3002 up built-in types by name. */
3005 tdecl = build_decl (TYPE_DECL, tname, type);
3006 DECL_ARTIFICIAL (tdecl) = 1;
3007 SET_IDENTIFIER_GLOBAL_VALUE (tname, tdecl);
3013 tdecl = build_decl (TYPE_DECL, rname, type);
3014 DECL_ARTIFICIAL (tdecl) = 1;
3016 SET_IDENTIFIER_GLOBAL_VALUE (rname, tdecl);
3019 if (!TYPE_NAME (type))
3020 TYPE_NAME (type) = tdecl;
3023 debug_hooks->type_decl (tdecl, 0);
3026 /* Record one of the standard Java types.
3027 * Declare it as having the given NAME.
3028 * If SIZE > 0, it is the size of one of the integral types;
3029 * otherwise it is the negative of the size of one of the other types. */
3032 record_builtin_java_type (const char* name, int size)
3036 type = make_signed_type (size);
3037 else if (size > -32)
3038 { /* "__java_char" or ""__java_boolean". */
3039 type = make_unsigned_type (-size);
3040 /*if (size == -1) TREE_SET_CODE (type, BOOLEAN_TYPE);*/
3043 { /* "__java_float" or ""__java_double". */
3044 type = make_node (REAL_TYPE);
3045 TYPE_PRECISION (type) = - size;
3048 record_builtin_type (RID_MAX, name, type);
3049 decl = TYPE_NAME (type);
3051 /* Suppress generate debug symbol entries for these types,
3052 since for normal C++ they are just clutter.
3053 However, push_lang_context undoes this if extern "Java" is seen. */
3054 DECL_IGNORED_P (decl) = 1;
3056 TYPE_FOR_JAVA (type) = 1;
3060 /* Push a type into the namespace so that the back ends ignore it. */
3063 record_unknown_type (tree type, const char* name)
3065 tree decl = pushdecl (build_decl (TYPE_DECL, get_identifier (name), type));
3066 /* Make sure the "unknown type" typedecl gets ignored for debug info. */
3067 DECL_IGNORED_P (decl) = 1;
3068 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
3069 TYPE_SIZE (type) = TYPE_SIZE (void_type_node);
3070 TYPE_ALIGN (type) = 1;
3071 TYPE_USER_ALIGN (type) = 0;
3072 TYPE_MODE (type) = TYPE_MODE (void_type_node);
3075 /* A string for which we should create an IDENTIFIER_NODE at
3078 typedef struct predefined_identifier
3080 /* The name of the identifier. */
3081 const char *const name;
3082 /* The place where the IDENTIFIER_NODE should be stored. */
3084 /* Nonzero if this is the name of a constructor or destructor. */
3085 const int ctor_or_dtor_p;
3086 } predefined_identifier;
3088 /* Create all the predefined identifiers. */
3091 initialize_predefined_identifiers (void)
3093 const predefined_identifier *pid;
3095 /* A table of identifiers to create at startup. */
3096 static const predefined_identifier predefined_identifiers[] = {
3097 { "C++", &lang_name_cplusplus, 0 },
3098 { "C", &lang_name_c, 0 },
3099 { "Java", &lang_name_java, 0 },
3100 /* Some of these names have a trailing space so that it is
3101 impossible for them to conflict with names written by users. */
3102 { "__ct ", &ctor_identifier, 1 },
3103 { "__base_ctor ", &base_ctor_identifier, 1 },
3104 { "__comp_ctor ", &complete_ctor_identifier, 1 },
3105 { "__dt ", &dtor_identifier, 1 },
3106 { "__comp_dtor ", &complete_dtor_identifier, 1 },
3107 { "__base_dtor ", &base_dtor_identifier, 1 },
3108 { "__deleting_dtor ", &deleting_dtor_identifier, 1 },
3109 { IN_CHARGE_NAME, &in_charge_identifier, 0 },
3110 { "nelts", &nelts_identifier, 0 },
3111 { THIS_NAME, &this_identifier, 0 },
3112 { VTABLE_DELTA_NAME, &delta_identifier, 0 },
3113 { VTABLE_PFN_NAME, &pfn_identifier, 0 },
3114 { "_vptr", &vptr_identifier, 0 },
3115 { "__vtt_parm", &vtt_parm_identifier, 0 },
3116 { "::", &global_scope_name, 0 },
3117 { "std", &std_identifier, 0 },
3121 for (pid = predefined_identifiers; pid->name; ++pid)
3123 *pid->node = get_identifier (pid->name);
3124 if (pid->ctor_or_dtor_p)
3125 IDENTIFIER_CTOR_OR_DTOR_P (*pid->node) = 1;
3129 /* Create the predefined scalar types of C,
3130 and some nodes representing standard constants (0, 1, (void *)0).
3131 Initialize the global binding level.
3132 Make definitions for built-in primitive functions. */
3135 cxx_init_decl_processing (void)
3138 tree void_ftype_ptr;
3140 build_common_tree_nodes (flag_signed_char, false);
3142 /* Create all the identifiers we need. */
3143 initialize_predefined_identifiers ();
3145 /* Create the global variables. */
3146 push_to_top_level ();
3148 current_function_decl = NULL_TREE;
3149 current_binding_level = NULL;
3150 /* Enter the global namespace. */
3151 gcc_assert (global_namespace == NULL_TREE);
3152 global_namespace = build_lang_decl (NAMESPACE_DECL, global_scope_name,
3154 TREE_PUBLIC (global_namespace) = 1;
3155 begin_scope (sk_namespace, global_namespace);
3157 current_lang_name = NULL_TREE;
3159 /* Force minimum function alignment if using the least significant
3160 bit of function pointers to store the virtual bit. */
3161 if (TARGET_PTRMEMFUNC_VBIT_LOCATION == ptrmemfunc_vbit_in_pfn
3162 && force_align_functions_log < 1)
3163 force_align_functions_log = 1;
3166 current_lang_name = lang_name_c;
3168 /* Create the `std' namespace. */
3169 push_namespace (std_identifier);
3170 std_node = current_namespace;
3173 c_common_nodes_and_builtins ();
3175 java_byte_type_node = record_builtin_java_type ("__java_byte", 8);
3176 java_short_type_node = record_builtin_java_type ("__java_short", 16);
3177 java_int_type_node = record_builtin_java_type ("__java_int", 32);
3178 java_long_type_node = record_builtin_java_type ("__java_long", 64);
3179 java_float_type_node = record_builtin_java_type ("__java_float", -32);
3180 java_double_type_node = record_builtin_java_type ("__java_double", -64);
3181 java_char_type_node = record_builtin_java_type ("__java_char", -16);
3182 java_boolean_type_node = record_builtin_java_type ("__java_boolean", -1);
3184 integer_two_node = build_int_cst (NULL_TREE, 2);
3185 integer_three_node = build_int_cst (NULL_TREE, 3);
3187 record_builtin_type (RID_BOOL, "bool", boolean_type_node);
3188 truthvalue_type_node = boolean_type_node;
3189 truthvalue_false_node = boolean_false_node;
3190 truthvalue_true_node = boolean_true_node;
3192 empty_except_spec = build_tree_list (NULL_TREE, NULL_TREE);
3195 record_builtin_type (RID_MAX, NULL, string_type_node);
3198 delta_type_node = ptrdiff_type_node;
3199 vtable_index_type = ptrdiff_type_node;
3201 vtt_parm_type = build_pointer_type (const_ptr_type_node);
3202 void_ftype = build_function_type (void_type_node, void_list_node);
3203 void_ftype_ptr = build_function_type (void_type_node,
3204 tree_cons (NULL_TREE,
3208 = build_exception_variant (void_ftype_ptr, empty_except_spec);
3210 /* C++ extensions */
3212 unknown_type_node = make_node (UNKNOWN_TYPE);
3213 record_unknown_type (unknown_type_node, "unknown type");
3215 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
3216 TREE_TYPE (unknown_type_node) = unknown_type_node;
3218 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
3220 TYPE_POINTER_TO (unknown_type_node) = unknown_type_node;
3221 TYPE_REFERENCE_TO (unknown_type_node) = unknown_type_node;
3224 /* Make sure we get a unique function type, so we can give
3225 its pointer type a name. (This wins for gdb.) */
3226 tree vfunc_type = make_node (FUNCTION_TYPE);
3227 TREE_TYPE (vfunc_type) = integer_type_node;
3228 TYPE_ARG_TYPES (vfunc_type) = NULL_TREE;
3229 layout_type (vfunc_type);
3231 vtable_entry_type = build_pointer_type (vfunc_type);
3233 record_builtin_type (RID_MAX, VTBL_PTR_TYPE, vtable_entry_type);
3236 = build_cplus_array_type (vtable_entry_type, NULL_TREE);
3237 layout_type (vtbl_type_node);
3238 vtbl_type_node = build_qualified_type (vtbl_type_node, TYPE_QUAL_CONST);
3239 record_builtin_type (RID_MAX, NULL, vtbl_type_node);
3240 vtbl_ptr_type_node = build_pointer_type (vtable_entry_type);
3241 layout_type (vtbl_ptr_type_node);
3242 record_builtin_type (RID_MAX, NULL, vtbl_ptr_type_node);
3244 push_namespace (get_identifier ("__cxxabiv1"));
3245 abi_node = current_namespace;
3248 global_type_node = make_node (LANG_TYPE);
3249 record_unknown_type (global_type_node, "global type");
3252 current_lang_name = lang_name_cplusplus;
3256 tree bad_alloc_type_node;
3257 tree bad_alloc_decl;
3258 tree newtype, deltype;
3259 tree ptr_ftype_sizetype;
3261 push_namespace (std_identifier);
3262 bad_alloc_id = get_identifier ("bad_alloc");
3263 bad_alloc_type_node = make_aggr_type (RECORD_TYPE);
3264 TYPE_CONTEXT (bad_alloc_type_node) = current_namespace;
3266 = create_implicit_typedef (bad_alloc_id, bad_alloc_type_node);
3267 DECL_CONTEXT (bad_alloc_decl) = current_namespace;
3268 TYPE_STUB_DECL (bad_alloc_type_node) = bad_alloc_decl;
3272 = build_function_type (ptr_type_node,
3273 tree_cons (NULL_TREE,
3276 newtype = build_exception_variant
3277 (ptr_ftype_sizetype, add_exception_specifier
3278 (NULL_TREE, bad_alloc_type_node, -1));
3279 deltype = build_exception_variant (void_ftype_ptr, empty_except_spec);
3280 push_cp_library_fn (NEW_EXPR, newtype);
3281 push_cp_library_fn (VEC_NEW_EXPR, newtype);
3282 global_delete_fndecl = push_cp_library_fn (DELETE_EXPR, deltype);
3283 push_cp_library_fn (VEC_DELETE_EXPR, deltype);
3287 = build_library_fn_ptr ("__cxa_pure_virtual", void_ftype);
3289 /* Perform other language dependent initializations. */
3290 init_class_processing ();
3291 init_rtti_processing ();
3293 if (flag_exceptions)
3294 init_exception_processing ();
3296 if (! supports_one_only ())
3299 make_fname_decl = cp_make_fname_decl;
3300 start_fname_decls ();
3302 /* Show we use EH for cleanups. */
3303 if (flag_exceptions)
3304 using_eh_for_cleanups ();
3307 /* Generate an initializer for a function naming variable from
3308 NAME. NAME may be NULL, to indicate a dependent name. TYPE_P is
3309 filled in with the type of the init. */
3312 cp_fname_init (const char* name, tree *type_p)
3314 tree domain = NULL_TREE;
3316 tree init = NULL_TREE;
3321 length = strlen (name);
3322 domain = build_index_type (size_int (length));
3323 init = build_string (length + 1, name);
3326 type = build_qualified_type (char_type_node, TYPE_QUAL_CONST);
3327 type = build_cplus_array_type (type, domain);
3332 TREE_TYPE (init) = type;
3334 init = error_mark_node;
3339 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give the
3340 decl, NAME is the initialization string and TYPE_DEP indicates whether
3341 NAME depended on the type of the function. We make use of that to detect
3342 __PRETTY_FUNCTION__ inside a template fn. This is being done
3343 lazily at the point of first use, so we mustn't push the decl now. */
3346 cp_make_fname_decl (tree id, int type_dep)
3348 const char *const name = (type_dep && processing_template_decl
3349 ? NULL : fname_as_string (type_dep));
3351 tree init = cp_fname_init (name, &type);
3352 tree decl = build_decl (VAR_DECL, id, type);
3355 free ((char *) name);
3357 /* As we're using pushdecl_with_scope, we must set the context. */
3358 DECL_CONTEXT (decl) = current_function_decl;
3359 DECL_PRETTY_FUNCTION_P (decl) = type_dep;
3361 TREE_STATIC (decl) = 1;
3362 TREE_READONLY (decl) = 1;
3363 DECL_ARTIFICIAL (decl) = 1;
3365 TREE_USED (decl) = 1;
3367 if (current_function_decl)
3369 struct cp_binding_level *b = current_binding_level;
3370 while (b->level_chain->kind != sk_function_parms)
3372 pushdecl_with_scope (decl, b, /*is_friend=*/false);
3373 cp_finish_decl (decl, init, /*init_const_expr_p=*/false, NULL_TREE,
3374 LOOKUP_ONLYCONVERTING);
3377 pushdecl_top_level_and_finish (decl, init);
3383 builtin_function_1 (tree decl, tree context)
3385 tree id = DECL_NAME (decl);
3386 const char *name = IDENTIFIER_POINTER (id);
3388 retrofit_lang_decl (decl);
3390 /* All nesting of C++ functions is lexical; there is never a "static
3391 chain" in the sense of GNU C nested functions. */
3392 DECL_NO_STATIC_CHAIN (decl) = 1;
3394 DECL_ARTIFICIAL (decl) = 1;
3395 SET_OVERLOADED_OPERATOR_CODE (decl, ERROR_MARK);
3396 SET_DECL_LANGUAGE (decl, lang_c);
3397 /* Runtime library routines are, by definition, available in an
3398 external shared object. */
3399 DECL_VISIBILITY (decl) = VISIBILITY_DEFAULT;
3400 DECL_VISIBILITY_SPECIFIED (decl) = 1;
3402 DECL_CONTEXT (decl) = context;
3406 /* A function in the user's namespace should have an explicit
3407 declaration before it is used. Mark the built-in function as
3408 anticipated but not actually declared. */
3409 if (name[0] != '_' || name[1] != '_')
3410 DECL_ANTICIPATED (decl) = 1;
3416 cxx_builtin_function (tree decl)
3418 tree id = DECL_NAME (decl);
3419 const char *name = IDENTIFIER_POINTER (id);
3420 /* All builtins that don't begin with an '_' should additionally
3421 go in the 'std' namespace. */
3424 tree decl2 = copy_node(decl);
3425 push_namespace (std_identifier);
3426 builtin_function_1 (decl2, std_node);
3430 return builtin_function_1 (decl, NULL_TREE);
3433 /* Generate a FUNCTION_DECL with the typical flags for a runtime library
3434 function. Not called directly. */
3437 build_library_fn_1 (tree name, enum tree_code operator_code, tree type)
3439 tree fn = build_lang_decl (FUNCTION_DECL, name, type);
3440 DECL_EXTERNAL (fn) = 1;
3441 TREE_PUBLIC (fn) = 1;
3442 DECL_ARTIFICIAL (fn) = 1;
3443 SET_OVERLOADED_OPERATOR_CODE (fn, operator_code);
3444 SET_DECL_LANGUAGE (fn, lang_c);
3445 /* Runtime library routines are, by definition, available in an
3446 external shared object. */
3447 DECL_VISIBILITY (fn) = VISIBILITY_DEFAULT;
3448 DECL_VISIBILITY_SPECIFIED (fn) = 1;
3452 /* Returns the _DECL for a library function with C linkage.
3453 We assume that such functions never throw; if this is incorrect,
3454 callers should unset TREE_NOTHROW. */
3457 build_library_fn (tree name, tree type)
3459 tree fn = build_library_fn_1 (name, ERROR_MARK, type);
3460 TREE_NOTHROW (fn) = 1;
3464 /* Returns the _DECL for a library function with C++ linkage. */
3467 build_cp_library_fn (tree name, enum tree_code operator_code, tree type)
3469 tree fn = build_library_fn_1 (name, operator_code, type);
3470 TREE_NOTHROW (fn) = TYPE_NOTHROW_P (type);
3471 DECL_CONTEXT (fn) = FROB_CONTEXT (current_namespace);
3472 SET_DECL_LANGUAGE (fn, lang_cplusplus);
3476 /* Like build_library_fn, but takes a C string instead of an
3480 build_library_fn_ptr (const char* name, tree type)
3482 return build_library_fn (get_identifier (name), type);
3485 /* Like build_cp_library_fn, but takes a C string instead of an
3489 build_cp_library_fn_ptr (const char* name, tree type)
3491 return build_cp_library_fn (get_identifier (name), ERROR_MARK, type);
3494 /* Like build_library_fn, but also pushes the function so that we will
3495 be able to find it via IDENTIFIER_GLOBAL_VALUE. */
3498 push_library_fn (tree name, tree type)
3500 tree fn = build_library_fn (name, type);
3501 pushdecl_top_level (fn);
3505 /* Like build_cp_library_fn, but also pushes the function so that it
3506 will be found by normal lookup. */
3509 push_cp_library_fn (enum tree_code operator_code, tree type)
3511 tree fn = build_cp_library_fn (ansi_opname (operator_code),
3518 /* Like push_library_fn, but takes a TREE_LIST of parm types rather than
3522 push_void_library_fn (tree name, tree parmtypes)
3524 tree type = build_function_type (void_type_node, parmtypes);
3525 return push_library_fn (name, type);
3528 /* Like push_library_fn, but also note that this function throws
3529 and does not return. Used for __throw_foo and the like. */
3532 push_throw_library_fn (tree name, tree type)
3534 tree fn = push_library_fn (name, type);
3535 TREE_THIS_VOLATILE (fn) = 1;
3536 TREE_NOTHROW (fn) = 0;
3540 /* When we call finish_struct for an anonymous union, we create
3541 default copy constructors and such. But, an anonymous union
3542 shouldn't have such things; this function undoes the damage to the
3543 anonymous union type T.
3545 (The reason that we create the synthesized methods is that we don't
3546 distinguish `union { int i; }' from `typedef union { int i; } U'.
3547 The first is an anonymous union; the second is just an ordinary
3551 fixup_anonymous_aggr (tree t)
3555 /* Wipe out memory of synthesized methods. */
3556 TYPE_HAS_CONSTRUCTOR (t) = 0;
3557 TYPE_HAS_DEFAULT_CONSTRUCTOR (t) = 0;
3558 TYPE_HAS_INIT_REF (t) = 0;
3559 TYPE_HAS_CONST_INIT_REF (t) = 0;
3560 TYPE_HAS_ASSIGN_REF (t) = 0;
3561 TYPE_HAS_CONST_ASSIGN_REF (t) = 0;
3563 /* Splice the implicitly generated functions out of the TYPE_METHODS
3565 q = &TYPE_METHODS (t);
3568 if (DECL_ARTIFICIAL (*q))
3569 *q = TREE_CHAIN (*q);
3571 q = &TREE_CHAIN (*q);
3574 /* ISO C++ 9.5.3. Anonymous unions may not have function members. */
3575 if (TYPE_METHODS (t))
3576 error ("%Jan anonymous union cannot have function members",
3577 TYPE_MAIN_DECL (t));
3579 /* Anonymous aggregates cannot have fields with ctors, dtors or complex
3580 assignment operators (because they cannot have these methods themselves).
3581 For anonymous unions this is already checked because they are not allowed
3582 in any union, otherwise we have to check it. */
3583 if (TREE_CODE (t) != UNION_TYPE)
3587 for (field = TYPE_FIELDS (t); field; field = TREE_CHAIN (field))
3588 if (TREE_CODE (field) == FIELD_DECL)
3590 type = TREE_TYPE (field);
3591 if (CLASS_TYPE_P (type))
3593 if (TYPE_NEEDS_CONSTRUCTING (type))
3594 error ("member %q+#D with constructor not allowed "
3595 "in anonymous aggregate", field);
3596 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
3597 error ("member %q+#D with destructor not allowed "
3598 "in anonymous aggregate", field);
3599 if (TYPE_HAS_COMPLEX_ASSIGN_REF (type))
3600 error ("member %q+#D with copy assignment operator "
3601 "not allowed in anonymous aggregate", field);
3607 /* Make sure that a declaration with no declarator is well-formed, i.e.
3608 just declares a tagged type or anonymous union.
3610 Returns the type declared; or NULL_TREE if none. */
3613 check_tag_decl (cp_decl_specifier_seq *declspecs)
3615 int saw_friend = declspecs->specs[(int)ds_friend] != 0;
3616 int saw_typedef = declspecs->specs[(int)ds_typedef] != 0;
3617 /* If a class, struct, or enum type is declared by the DECLSPECS
3618 (i.e, if a class-specifier, enum-specifier, or non-typename
3619 elaborated-type-specifier appears in the DECLSPECS),
3620 DECLARED_TYPE is set to the corresponding type. */
3621 tree declared_type = NULL_TREE;
3622 bool error_p = false;
3624 if (declspecs->multiple_types_p)
3625 error ("multiple types in one declaration");
3626 else if (declspecs->redefined_builtin_type)
3628 if (!in_system_header)
3629 pedwarn ("redeclaration of C++ built-in type %qT",
3630 declspecs->redefined_builtin_type);
3635 && TYPE_P (declspecs->type)
3636 && ((TREE_CODE (declspecs->type) != TYPENAME_TYPE
3637 && IS_AGGR_TYPE (declspecs->type))
3638 || TREE_CODE (declspecs->type) == ENUMERAL_TYPE))
3639 declared_type = declspecs->type;
3640 else if (declspecs->type == error_mark_node)
3642 if (declared_type == NULL_TREE && ! saw_friend && !error_p)
3643 pedwarn ("declaration does not declare anything");
3644 /* Check for an anonymous union. */
3645 else if (declared_type && IS_AGGR_TYPE_CODE (TREE_CODE (declared_type))
3646 && TYPE_ANONYMOUS_P (declared_type))
3648 /* 7/3 In a simple-declaration, the optional init-declarator-list
3649 can be omitted only when declaring a class (clause 9) or
3650 enumeration (7.2), that is, when the decl-specifier-seq contains
3651 either a class-specifier, an elaborated-type-specifier with
3652 a class-key (9.1), or an enum-specifier. In these cases and
3653 whenever a class-specifier or enum-specifier is present in the
3654 decl-specifier-seq, the identifiers in these specifiers are among
3655 the names being declared by the declaration (as class-name,
3656 enum-names, or enumerators, depending on the syntax). In such
3657 cases, and except for the declaration of an unnamed bit-field (9.6),
3658 the decl-specifier-seq shall introduce one or more names into the
3659 program, or shall redeclare a name introduced by a previous
3660 declaration. [Example:
3661 enum { }; // ill-formed
3662 typedef class { }; // ill-formed
3666 error ("missing type-name in typedef-declaration");
3669 /* Anonymous unions are objects, so they can have specifiers. */;
3670 SET_ANON_AGGR_TYPE_P (declared_type);
3672 if (TREE_CODE (declared_type) != UNION_TYPE && pedantic
3673 && !in_system_header)
3674 pedwarn ("ISO C++ prohibits anonymous structs");
3679 if (declspecs->specs[(int)ds_inline]
3680 || declspecs->specs[(int)ds_virtual])
3681 error ("%qs can only be specified for functions",
3682 declspecs->specs[(int)ds_inline]
3683 ? "inline" : "virtual");
3685 && (!current_class_type
3686 || current_scope () != current_class_type))
3687 error ("%<friend%> can only be specified inside a class");
3688 else if (declspecs->specs[(int)ds_explicit])
3689 error ("%<explicit%> can only be specified for constructors");
3690 else if (declspecs->storage_class)
3691 error ("a storage class can only be specified for objects "
3693 else if (declspecs->specs[(int)ds_const]
3694 || declspecs->specs[(int)ds_volatile]
3695 || declspecs->specs[(int)ds_restrict]
3696 || declspecs->specs[(int)ds_thread])
3697 error ("qualifiers can only be specified for objects "
3699 else if (saw_typedef)
3700 warning (0, "%<typedef%> was ignored in this declaration");
3703 return declared_type;
3706 /* Called when a declaration is seen that contains no names to declare.
3707 If its type is a reference to a structure, union or enum inherited
3708 from a containing scope, shadow that tag name for the current scope
3709 with a forward reference.
3710 If its type defines a new named structure or union
3711 or defines an enum, it is valid but we need not do anything here.
3712 Otherwise, it is an error.
3714 C++: may have to grok the declspecs to learn about static,
3715 complain for anonymous unions.
3717 Returns the TYPE declared -- or NULL_TREE if none. */
3720 shadow_tag (cp_decl_specifier_seq *declspecs)
3722 tree t = check_tag_decl (declspecs);
3727 if (declspecs->attributes)
3729 warning (0, "attribute ignored in declaration of %q+#T", t);
3730 warning (0, "attribute for %q+#T must follow the %qs keyword",
3731 t, class_key_or_enum_as_string (t));
3735 if (maybe_process_partial_specialization (t) == error_mark_node)
3738 /* This is where the variables in an anonymous union are
3739 declared. An anonymous union declaration looks like:
3741 because there is no declarator after the union, the parser
3742 sends that declaration here. */
3743 if (ANON_AGGR_TYPE_P (t))
3745 fixup_anonymous_aggr (t);
3747 if (TYPE_FIELDS (t))
3749 tree decl = grokdeclarator (/*declarator=*/NULL,
3750 declspecs, NORMAL, 0, NULL);
3751 finish_anon_union (decl);
3758 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
3761 groktypename (cp_decl_specifier_seq *type_specifiers,
3762 const cp_declarator *declarator)
3766 attrs = type_specifiers->attributes;
3767 type_specifiers->attributes = NULL_TREE;
3768 type = grokdeclarator (declarator, type_specifiers, TYPENAME, 0, &attrs);
3770 cplus_decl_attributes (&type, attrs, 0);
3774 /* Decode a declarator in an ordinary declaration or data definition.
3775 This is called as soon as the type information and variable name
3776 have been parsed, before parsing the initializer if any.
3777 Here we create the ..._DECL node, fill in its type,
3778 and put it on the list of decls for the current context.
3779 The ..._DECL node is returned as the value.
3781 Exception: for arrays where the length is not specified,
3782 the type is left null, to be filled in by `cp_finish_decl'.
3784 Function definitions do not come here; they go to start_function
3785 instead. However, external and forward declarations of functions
3786 do go through here. Structure field declarations are done by
3787 grokfield and not through here. */
3790 start_decl (const cp_declarator *declarator,
3791 cp_decl_specifier_seq *declspecs,
3794 tree prefix_attributes,
3795 tree *pushed_scope_p)
3801 *pushed_scope_p = NULL_TREE;
3803 /* An object declared as __attribute__((deprecated)) suppresses
3804 warnings of uses of other deprecated items. */
3805 if (lookup_attribute ("deprecated", attributes))
3806 deprecated_state = DEPRECATED_SUPPRESS;
3808 attributes = chainon (attributes, prefix_attributes);
3810 decl = grokdeclarator (declarator, declspecs, NORMAL, initialized,
3813 deprecated_state = DEPRECATED_NORMAL;
3815 if (decl == NULL_TREE || TREE_CODE (decl) == VOID_TYPE
3816 || decl == error_mark_node)
3817 return error_mark_node;
3819 type = TREE_TYPE (decl);
3821 context = DECL_CONTEXT (decl);
3825 *pushed_scope_p = push_scope (context);
3827 /* We are only interested in class contexts, later. */
3828 if (TREE_CODE (context) == NAMESPACE_DECL)
3829 context = NULL_TREE;
3833 /* Is it valid for this decl to have an initializer at all?
3834 If not, set INITIALIZED to zero, which will indirectly
3835 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
3836 switch (TREE_CODE (decl))
3839 error ("typedef %qD is initialized (use __typeof__ instead)", decl);
3840 return error_mark_node;
3843 error ("function %q#D is initialized like a variable", decl);
3844 return error_mark_node;
3852 if (! toplevel_bindings_p ()
3853 && DECL_EXTERNAL (decl))
3854 warning (0, "declaration of %q#D has %<extern%> and is initialized",
3856 DECL_EXTERNAL (decl) = 0;
3857 if (toplevel_bindings_p ())
3858 TREE_STATIC (decl) = 1;
3861 /* Set attributes here so if duplicate decl, will have proper attributes. */
3862 cplus_decl_attributes (&decl, attributes, 0);
3864 /* Dllimported symbols cannot be defined. Static data members (which
3865 can be initialized in-class and dllimported) go through grokfield,
3866 not here, so we don't need to exclude those decls when checking for
3868 if (initialized && DECL_DLLIMPORT_P (decl))
3870 error ("definition of %q#D is marked %<dllimport%>", decl);
3871 DECL_DLLIMPORT_P (decl) = 0;
3874 /* If #pragma weak was used, mark the decl weak now. */
3875 maybe_apply_pragma_weak (decl);
3877 if (TREE_CODE (decl) == FUNCTION_DECL
3878 && DECL_DECLARED_INLINE_P (decl)
3879 && DECL_UNINLINABLE (decl)
3880 && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl)))
3881 warning (0, "inline function %q+D given attribute noinline", decl);
3883 if (context && COMPLETE_TYPE_P (complete_type (context)))
3885 if (TREE_CODE (decl) == VAR_DECL)
3887 tree field = lookup_field (context, DECL_NAME (decl), 0, false);
3888 if (field == NULL_TREE || TREE_CODE (field) != VAR_DECL)
3889 error ("%q#D is not a static member of %q#T", decl, context);
3892 if (DECL_CONTEXT (field) != context)
3894 if (!same_type_p (DECL_CONTEXT (field), context))
3895 pedwarn ("ISO C++ does not permit %<%T::%D%> "
3896 "to be defined as %<%T::%D%>",
3897 DECL_CONTEXT (field), DECL_NAME (decl),
3898 context, DECL_NAME (decl));
3899 DECL_CONTEXT (decl) = DECL_CONTEXT (field);
3901 if (processing_specialization
3902 && template_class_depth (context) == 0
3903 && CLASSTYPE_TEMPLATE_SPECIALIZATION (context))
3904 error ("template header not allowed in member definition "
3905 "of explicitly specialized class");
3906 /* Static data member are tricky; an in-class initialization
3907 still doesn't provide a definition, so the in-class
3908 declaration will have DECL_EXTERNAL set, but will have an
3909 initialization. Thus, duplicate_decls won't warn
3910 about this situation, and so we check here. */
3911 if (initialized && DECL_INITIALIZED_IN_CLASS_P (field))
3912 error ("duplicate initialization of %qD", decl);
3913 if (duplicate_decls (decl, field, /*newdecl_is_friend=*/false))
3919 tree field = check_classfn (context, decl,
3920 (processing_template_decl
3921 > template_class_depth (context))
3922 ? current_template_parms
3924 if (field && duplicate_decls (decl, field,
3925 /*newdecl_is_friend=*/false))
3929 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
3930 DECL_IN_AGGR_P (decl) = 0;
3931 /* Do not mark DECL as an explicit specialization if it was not
3932 already marked as an instantiation; a declaration should
3933 never be marked as a specialization unless we know what
3934 template is being specialized. */
3935 if (DECL_LANG_SPECIFIC (decl) && DECL_USE_TEMPLATE (decl))
3937 SET_DECL_TEMPLATE_SPECIALIZATION (decl);
3939 /* [temp.expl.spec] An explicit specialization of a static data
3940 member of a template is a definition if the declaration
3941 includes an initializer; otherwise, it is a declaration.
3943 We check for processing_specialization so this only applies
3944 to the new specialization syntax. */
3945 if (!initialized && processing_specialization)
3946 DECL_EXTERNAL (decl) = 1;
3949 if (DECL_EXTERNAL (decl) && ! DECL_TEMPLATE_SPECIALIZATION (decl))
3950 pedwarn ("declaration of %q#D outside of class is not definition",
3954 /* Enter this declaration into the symbol table. */
3955 tem = maybe_push_decl (decl);
3957 if (processing_template_decl)
3958 tem = push_template_decl (tem);
3959 if (tem == error_mark_node)
3960 return error_mark_node;
3962 /* Tell the back end to use or not use .common as appropriate. If we say
3963 -fconserve-space, we want this to save .data space, at the expense of
3964 wrong semantics. If we say -fno-conserve-space, we want this to
3965 produce errors about redefs; to do this we force variables into the
3967 if (flag_conserve_space
3968 && TREE_CODE (tem) == VAR_DECL
3969 && TREE_PUBLIC (tem)
3970 && !DECL_THREAD_LOCAL_P (tem)
3971 && !have_global_bss_p ())
3972 DECL_COMMON (tem) = 1;
3974 if (!processing_template_decl && TREE_CODE (tem) == VAR_DECL)
3975 start_decl_1 (tem, initialized);
3981 start_decl_1 (tree decl, bool initialized)
3985 gcc_assert (!processing_template_decl);
3987 if (error_operand_p (decl))
3990 gcc_assert (TREE_CODE (decl) == VAR_DECL);
3991 type = TREE_TYPE (decl);
3994 /* Is it valid for this decl to have an initializer at all?
3995 If not, set INITIALIZED to zero, which will indirectly
3996 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
3998 /* Don't allow initializations for incomplete types except for
3999 arrays which might be completed by the initialization. */
4000 if (COMPLETE_TYPE_P (complete_type (type)))
4001 ; /* A complete type is ok. */
4002 else if (TREE_CODE (type) != ARRAY_TYPE)
4004 error ("variable %q#D has initializer but incomplete type", decl);
4006 type = TREE_TYPE (decl) = error_mark_node;
4008 else if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (type))))
4010 if (DECL_LANG_SPECIFIC (decl) && DECL_TEMPLATE_INFO (decl))
4011 error ("elements of array %q#D have incomplete type", decl);
4012 /* else we already gave an error in start_decl. */
4016 else if (IS_AGGR_TYPE (type)
4017 && ! DECL_EXTERNAL (decl))
4019 if (!COMPLETE_TYPE_P (complete_type (type)))
4021 error ("aggregate %q#D has incomplete type and cannot be defined",
4023 /* Change the type so that assemble_variable will give
4024 DECL an rtl we can live with: (mem (const_int 0)). */
4025 type = TREE_TYPE (decl) = error_mark_node;
4029 /* If any base type in the hierarchy of TYPE needs a constructor,
4030 then we set initialized to 1. This way any nodes which are
4031 created for the purposes of initializing this aggregate
4032 will live as long as it does. This is necessary for global
4033 aggregates which do not have their initializers processed until
4034 the end of the file. */
4035 initialized = TYPE_NEEDS_CONSTRUCTING (type);
4039 /* Create a new scope to hold this declaration if necessary.
4040 Whether or not a new scope is necessary cannot be determined
4041 until after the type has been completed; if the type is a
4042 specialization of a class template it is not until after
4043 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
4044 will be set correctly. */
4045 maybe_push_cleanup_level (type);
4048 /* Handle initialization of references. DECL, TYPE, and INIT have the
4049 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
4050 but will be set to a new CLEANUP_STMT if a temporary is created
4051 that must be destroyed subsequently.
4053 Returns an initializer expression to use to initialize DECL, or
4054 NULL if the initialization can be performed statically.
4056 Quotes on semantics can be found in ARM 8.4.3. */
4059 grok_reference_init (tree decl, tree type, tree init, tree *cleanup)
4063 if (init == NULL_TREE)
4065 if ((DECL_LANG_SPECIFIC (decl) == 0
4066 || DECL_IN_AGGR_P (decl) == 0)
4067 && ! DECL_THIS_EXTERN (decl))
4068 error ("%qD declared as reference but not initialized", decl);
4072 if (TREE_CODE (init) == CONSTRUCTOR)
4074 error ("ISO C++ forbids use of initializer list to "
4075 "initialize reference %qD", decl);
4079 if (TREE_CODE (init) == TREE_LIST)
4080 init = build_x_compound_expr_from_list (init, "initializer");
4082 if (TREE_CODE (TREE_TYPE (type)) != ARRAY_TYPE
4083 && TREE_CODE (TREE_TYPE (init)) == ARRAY_TYPE)
4084 /* Note: default conversion is only called in very special cases. */
4085 init = decay_conversion (init);
4087 /* Convert INIT to the reference type TYPE. This may involve the
4088 creation of a temporary, whose lifetime must be the same as that
4089 of the reference. If so, a DECL_EXPR for the temporary will be
4090 added just after the DECL_EXPR for DECL. That's why we don't set
4091 DECL_INITIAL for local references (instead assigning to them
4092 explicitly); we need to allow the temporary to be initialized
4094 tmp = initialize_reference (type, init, decl, cleanup);
4096 if (tmp == error_mark_node)
4098 else if (tmp == NULL_TREE)
4100 error ("cannot initialize %qT from %qT", type, TREE_TYPE (init));
4104 if (TREE_STATIC (decl) && !TREE_CONSTANT (tmp))
4107 DECL_INITIAL (decl) = tmp;
4112 /* Designated initializers in arrays are not supported in GNU C++.
4113 The parser cannot detect this error since it does not know whether
4114 a given brace-enclosed initializer is for a class type or for an
4115 array. This function checks that CE does not use a designated
4116 initializer. If it does, an error is issued. Returns true if CE
4117 is valid, i.e., does not have a designated initializer. */
4120 check_array_designated_initializer (const constructor_elt *ce)
4122 /* Designated initializers for array elements are not supported. */
4125 /* The parser only allows identifiers as designated
4127 gcc_assert (TREE_CODE (ce->index) == IDENTIFIER_NODE);
4128 error ("name %qD used in a GNU-style designated "
4129 "initializer for an array", ce->index);
4136 /* When parsing `int a[] = {1, 2};' we don't know the size of the
4137 array until we finish parsing the initializer. If that's the
4138 situation we're in, update DECL accordingly. */
4141 maybe_deduce_size_from_array_init (tree decl, tree init)
4143 tree type = TREE_TYPE (decl);
4145 if (TREE_CODE (type) == ARRAY_TYPE
4146 && TYPE_DOMAIN (type) == NULL_TREE
4147 && TREE_CODE (decl) != TYPE_DECL)
4149 /* do_default is really a C-ism to deal with tentative definitions.
4150 But let's leave it here to ease the eventual merge. */
4151 int do_default = !DECL_EXTERNAL (decl);
4152 tree initializer = init ? init : DECL_INITIAL (decl);
4155 /* Check that there are no designated initializers in INIT, as
4156 those are not supported in GNU C++, and as the middle-end
4157 will crash if presented with a non-numeric designated
4159 if (initializer && TREE_CODE (initializer) == CONSTRUCTOR)
4161 VEC(constructor_elt,gc) *v = CONSTRUCTOR_ELTS (initializer);
4162 constructor_elt *ce;
4165 VEC_iterate (constructor_elt, v, i, ce);
4167 if (!check_array_designated_initializer (ce))
4173 failure = cp_complete_array_type (&TREE_TYPE (decl), initializer,
4177 error ("initializer fails to determine size of %qD", decl);
4178 TREE_TYPE (decl) = error_mark_node;
4180 else if (failure == 2)
4184 error ("array size missing in %qD", decl);
4185 TREE_TYPE (decl) = error_mark_node;
4187 /* If a `static' var's size isn't known, make it extern as
4188 well as static, so it does not get allocated. If it's not
4189 `static', then don't mark it extern; finish_incomplete_decl
4190 will give it a default size and it will get allocated. */
4191 else if (!pedantic && TREE_STATIC (decl) && !TREE_PUBLIC (decl))
4192 DECL_EXTERNAL (decl) = 1;
4194 else if (failure == 3)
4196 error ("zero-size array %qD", decl);
4197 TREE_TYPE (decl) = error_mark_node;
4201 cp_apply_type_quals_to_decl (cp_type_quals (TREE_TYPE (decl)), decl);
4203 layout_decl (decl, 0);
4207 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
4208 any appropriate error messages regarding the layout. */
4211 layout_var_decl (tree decl)
4215 type = TREE_TYPE (decl);
4216 if (type == error_mark_node)
4219 /* If we haven't already layed out this declaration, do so now.
4220 Note that we must not call complete type for an external object
4221 because it's type might involve templates that we are not
4222 supposed to instantiate yet. (And it's perfectly valid to say
4223 `extern X x' for some incomplete type `X'.) */
4224 if (!DECL_EXTERNAL (decl))
4225 complete_type (type);
4226 if (!DECL_SIZE (decl)
4227 && TREE_TYPE (decl) != error_mark_node
4228 && (COMPLETE_TYPE_P (type)
4229 || (TREE_CODE (type) == ARRAY_TYPE
4230 && !TYPE_DOMAIN (type)
4231 && COMPLETE_TYPE_P (TREE_TYPE (type)))))
4232 layout_decl (decl, 0);
4234 if (!DECL_EXTERNAL (decl) && DECL_SIZE (decl) == NULL_TREE)
4236 /* An automatic variable with an incomplete type: that is an error.
4237 Don't talk about array types here, since we took care of that
4238 message in grokdeclarator. */
4239 error ("storage size of %qD isn't known", decl);
4240 TREE_TYPE (decl) = error_mark_node;
4243 /* Keep this code around in case we later want to control debug info
4244 based on whether a type is "used". (jason 1999-11-11) */
4246 else if (!DECL_EXTERNAL (decl) && IS_AGGR_TYPE (ttype))
4247 /* Let debugger know it should output info for this type. */
4248 note_debug_info_needed (ttype);
4250 if (TREE_STATIC (decl) && DECL_CLASS_SCOPE_P (decl))
4251 note_debug_info_needed (DECL_CONTEXT (decl));
4254 if ((DECL_EXTERNAL (decl) || TREE_STATIC (decl))
4255 && DECL_SIZE (decl) != NULL_TREE
4256 && ! TREE_CONSTANT (DECL_SIZE (decl)))
4258 if (TREE_CODE (DECL_SIZE (decl)) == INTEGER_CST)
4259 constant_expression_warning (DECL_SIZE (decl));
4261 error ("storage size of %qD isn't constant", decl);
4265 /* If a local static variable is declared in an inline function, or if
4266 we have a weak definition, we must endeavor to create only one
4267 instance of the variable at link-time. */
4270 maybe_commonize_var (tree decl)
4272 /* Static data in a function with comdat linkage also has comdat
4274 if (TREE_STATIC (decl)
4275 /* Don't mess with __FUNCTION__. */
4276 && ! DECL_ARTIFICIAL (decl)
4277 && DECL_FUNCTION_SCOPE_P (decl)
4278 /* Unfortunately, import_export_decl has not always been called
4279 before the function is processed, so we cannot simply check
4281 && (DECL_COMDAT (DECL_CONTEXT (decl))
4282 || ((DECL_DECLARED_INLINE_P (DECL_CONTEXT (decl))
4283 || DECL_TEMPLATE_INSTANTIATION (DECL_CONTEXT (decl)))
4284 && TREE_PUBLIC (DECL_CONTEXT (decl)))))
4288 /* With weak symbols, we simply make the variable COMDAT;
4289 that will cause copies in multiple translations units to
4291 comdat_linkage (decl);
4295 if (DECL_INITIAL (decl) == NULL_TREE
4296 || DECL_INITIAL (decl) == error_mark_node)
4298 /* Without weak symbols, we can use COMMON to merge
4299 uninitialized variables. */
4300 TREE_PUBLIC (decl) = 1;
4301 DECL_COMMON (decl) = 1;
4305 /* While for initialized variables, we must use internal
4306 linkage -- which means that multiple copies will not
4308 TREE_PUBLIC (decl) = 0;
4309 DECL_COMMON (decl) = 0;
4310 warning (0, "sorry: semantics of inline function static "
4311 "data %q+#D are wrong (you'll wind up "
4312 "with multiple copies)", decl);
4313 warning (0, "%J you can work around this by removing "
4319 else if (DECL_LANG_SPECIFIC (decl) && DECL_COMDAT (decl))
4320 /* Set it up again; we might have set DECL_INITIAL since the last
4322 comdat_linkage (decl);
4325 /* Issue an error message if DECL is an uninitialized const variable. */
4328 check_for_uninitialized_const_var (tree decl)
4330 tree type = TREE_TYPE (decl);
4332 /* ``Unless explicitly declared extern, a const object does not have
4333 external linkage and must be initialized. ($8.4; $12.1)'' ARM
4335 if (TREE_CODE (decl) == VAR_DECL
4336 && TREE_CODE (type) != REFERENCE_TYPE
4337 && CP_TYPE_CONST_P (type)
4338 && !TYPE_NEEDS_CONSTRUCTING (type)
4339 && !DECL_INITIAL (decl))
4340 error ("uninitialized const %qD", decl);
4344 /* Structure holding the current initializer being processed by reshape_init.
4345 CUR is a pointer to the current element being processed, END is a pointer
4346 after the last element present in the initializer. */
4347 typedef struct reshape_iterator_t
4349 constructor_elt *cur;
4350 constructor_elt *end;
4353 static tree reshape_init_r (tree, reshape_iter *, bool);
4355 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
4356 returned is the next FIELD_DECL (possibly FIELD itself) that can be
4357 initialized. If there are no more such fields, the return value
4361 next_initializable_field (tree field)
4364 && (TREE_CODE (field) != FIELD_DECL
4365 || (DECL_C_BIT_FIELD (field) && !DECL_NAME (field))
4366 || DECL_ARTIFICIAL (field)))
4367 field = TREE_CHAIN (field);
4372 /* Subroutine of reshape_init_array and reshape_init_vector, which does
4373 the actual work. ELT_TYPE is the element type of the array. MAX_INDEX is an
4374 INTEGER_CST representing the size of the array minus one (the maximum index),
4375 or NULL_TREE if the array was declared without specifying the size. D is
4376 the iterator within the constructor. */
4379 reshape_init_array_1 (tree elt_type, tree max_index, reshape_iter *d)
4382 bool sized_array_p = (max_index != NULL_TREE);
4383 unsigned HOST_WIDE_INT max_index_cst = 0;
4384 unsigned HOST_WIDE_INT index;
4386 /* The initializer for an array is always a CONSTRUCTOR. */
4387 new_init = build_constructor (NULL_TREE, NULL);
4391 /* Minus 1 is used for zero sized arrays. */
4392 if (integer_all_onesp (max_index))
4395 if (host_integerp (max_index, 1))
4396 max_index_cst = tree_low_cst (max_index, 1);
4397 /* sizetype is sign extended, not zero extended. */
4399 max_index_cst = tree_low_cst (fold_convert (size_type_node, max_index),
4403 /* Loop until there are no more initializers. */
4405 d->cur != d->end && (!sized_array_p || index <= max_index_cst);
4410 check_array_designated_initializer (d->cur);
4411 elt_init = reshape_init_r (elt_type, d, /*first_initializer_p=*/false);
4412 if (elt_init == error_mark_node)
4413 return error_mark_node;
4414 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init), NULL_TREE, elt_init);
4420 /* Subroutine of reshape_init_r, processes the initializers for arrays.
4421 Parameters are the same of reshape_init_r. */
4424 reshape_init_array (tree type, reshape_iter *d)
4426 tree max_index = NULL_TREE;
4428 gcc_assert (TREE_CODE (type) == ARRAY_TYPE);
4430 if (TYPE_DOMAIN (type))
4431 max_index = array_type_nelts (type);
4433 return reshape_init_array_1 (TREE_TYPE (type), max_index, d);
4436 /* Subroutine of reshape_init_r, processes the initializers for vectors.
4437 Parameters are the same of reshape_init_r. */
4440 reshape_init_vector (tree type, reshape_iter *d)
4442 tree max_index = NULL_TREE;
4445 gcc_assert (TREE_CODE (type) == VECTOR_TYPE);
4447 if (COMPOUND_LITERAL_P (d->cur->value))
4449 tree value = d->cur->value;
4450 if (!same_type_p (TREE_TYPE (value), type))
4452 error ("invalid type %qT as initializer for a vector of type %qT",
4453 TREE_TYPE (d->cur->value), type);
4454 value = error_mark_node;
4460 /* For a vector, the representation type is a struct
4461 containing a single member which is an array of the
4462 appropriate size. */
4463 rtype = TYPE_DEBUG_REPRESENTATION_TYPE (type);
4464 if (rtype && TYPE_DOMAIN (TREE_TYPE (TYPE_FIELDS (rtype))))
4465 max_index = array_type_nelts (TREE_TYPE (TYPE_FIELDS (rtype)));
4467 return reshape_init_array_1 (TREE_TYPE (type), max_index, d);
4470 /* Subroutine of reshape_init_r, processes the initializers for classes
4471 or union. Parameters are the same of reshape_init_r. */
4474 reshape_init_class (tree type, reshape_iter *d, bool first_initializer_p)
4479 gcc_assert (CLASS_TYPE_P (type));
4481 /* The initializer for a class is always a CONSTRUCTOR. */
4482 new_init = build_constructor (NULL_TREE, NULL);
4483 field = next_initializable_field (TYPE_FIELDS (type));
4489 An initializer for an aggregate member that is an
4490 empty class shall have the form of an empty
4491 initializer-list {}. */
4492 if (!first_initializer_p)
4494 error ("initializer for %qT must be brace-enclosed", type);
4495 return error_mark_node;
4500 /* Loop through the initializable fields, gathering initializers. */
4501 while (d->cur != d->end)
4505 /* Handle designated initializers, as an extension. */
4508 field = lookup_field_1 (type, d->cur->index, /*want_type=*/false);
4510 if (!field || TREE_CODE (field) != FIELD_DECL)
4512 error ("%qT has no non-static data member named %qD", type,
4514 return error_mark_node;
4518 /* If we processed all the member of the class, we are done. */
4522 field_init = reshape_init_r (TREE_TYPE (field), d,
4523 /*first_initializer_p=*/false);
4524 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init), field, field_init);
4528 When a union is initialized with a brace-enclosed
4529 initializer, the braces shall only contain an
4530 initializer for the first member of the union. */
4531 if (TREE_CODE (type) == UNION_TYPE)
4534 field = next_initializable_field (TREE_CHAIN (field));
4540 /* Subroutine of reshape_init, which processes a single initializer (part of
4541 a CONSTRUCTOR). TYPE is the type of the variable being initialized, D is the
4542 iterator within the CONSTRUCTOR which points to the initializer to process.
4543 FIRST_INITIALIZER_P is true if this is the first initializer of the
4544 CONSTRUCTOR node. */
4547 reshape_init_r (tree type, reshape_iter *d, bool first_initializer_p)
4549 tree init = d->cur->value;
4551 /* A non-aggregate type is always initialized with a single
4553 if (!CP_AGGREGATE_TYPE_P (type))
4555 /* It is invalid to initialize a non-aggregate type with a
4556 brace-enclosed initializer.
4557 We need to check for BRACE_ENCLOSED_INITIALIZER_P here because
4558 of g++.old-deja/g++.mike/p7626.C: a pointer-to-member constant is
4559 a CONSTRUCTOR (with a record type). */
4560 if (TREE_CODE (init) == CONSTRUCTOR
4561 && BRACE_ENCLOSED_INITIALIZER_P (init)) /* p7626.C */
4563 error ("braces around scalar initializer for type %qT", type);
4564 init = error_mark_node;
4573 All implicit type conversions (clause _conv_) are considered when
4574 initializing the aggregate member with an initializer from an
4575 initializer-list. If the initializer can initialize a member,
4576 the member is initialized. Otherwise, if the member is itself a
4577 non-empty subaggregate, brace elision is assumed and the
4578 initializer is considered for the initialization of the first
4579 member of the subaggregate. */
4580 if (TREE_CODE (init) != CONSTRUCTOR
4581 && can_convert_arg (type, TREE_TYPE (init), init, LOOKUP_NORMAL))
4587 /* [dcl.init.string]
4589 A char array (whether plain char, signed char, or unsigned char)
4590 can be initialized by a string-literal (optionally enclosed in
4591 braces); a wchar_t array can be initialized by a wide
4592 string-literal (optionally enclosed in braces). */
4593 if (TREE_CODE (type) == ARRAY_TYPE
4594 && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type))))
4596 tree str_init = init;
4598 /* Strip one level of braces if and only if they enclose a single
4599 element (as allowed by [dcl.init.string]). */
4600 if (!first_initializer_p
4601 && TREE_CODE (str_init) == CONSTRUCTOR
4602 && VEC_length (constructor_elt, CONSTRUCTOR_ELTS (str_init)) == 1)
4604 str_init = VEC_index (constructor_elt,
4605 CONSTRUCTOR_ELTS (str_init), 0)->value;
4608 /* If it's a string literal, then it's the initializer for the array
4609 as a whole. Otherwise, continue with normal initialization for
4610 array types (one value per array element). */
4611 if (TREE_CODE (str_init) == STRING_CST)
4618 /* The following cases are about aggregates. If we are not within a full
4619 initializer already, and there is not a CONSTRUCTOR, it means that there
4620 is a missing set of braces (that is, we are processing the case for
4621 which reshape_init exists). */
4622 if (!first_initializer_p)
4624 if (TREE_CODE (init) == CONSTRUCTOR)
4626 /* For a nested compound literal, there is no need to reshape since
4627 brace elision is not allowed. Even if we decided to allow it,
4628 we should add a call to reshape_init in finish_compound_literal,
4629 before calling digest_init, so changing this code would still
4630 not be necessary. */
4631 if (!COMPOUND_LITERAL_P (init))
4634 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init));
4635 return reshape_init (type, init);
4638 gcc_assert (!BRACE_ENCLOSED_INITIALIZER_P (init));
4641 warning (OPT_Wmissing_braces, "missing braces around initializer for %qT",
4645 /* Dispatch to specialized routines. */
4646 if (CLASS_TYPE_P (type))
4647 return reshape_init_class (type, d, first_initializer_p);
4648 else if (TREE_CODE (type) == ARRAY_TYPE)
4649 return reshape_init_array (type, d);
4650 else if (TREE_CODE (type) == VECTOR_TYPE)
4651 return reshape_init_vector (type, d);
4656 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
4657 brace-enclosed aggregate initializer.
4659 INIT is the CONSTRUCTOR containing the list of initializers describing
4660 a brace-enclosed initializer for an entity of the indicated aggregate TYPE.
4661 It may not presently match the shape of the TYPE; for example:
4663 struct S { int a; int b; };
4664 struct S a[] = { 1, 2, 3, 4 };
4666 Here INIT will hold a VEC of four elements, rather than a
4667 VEC of two elements, each itself a VEC of two elements. This
4668 routine transforms INIT from the former form into the latter. The
4669 revised CONSTRUCTOR node is returned. */
4672 reshape_init (tree type, tree init)
4674 VEC(constructor_elt, gc) *v;
4678 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init));
4680 v = CONSTRUCTOR_ELTS (init);
4682 /* An empty constructor does not need reshaping, and it is always a valid
4684 if (VEC_empty (constructor_elt, v))
4687 /* Recurse on this CONSTRUCTOR. */
4688 d.cur = VEC_index (constructor_elt, v, 0);
4689 d.end = d.cur + VEC_length (constructor_elt, v);
4691 new_init = reshape_init_r (type, &d, true);
4692 if (new_init == error_mark_node)
4693 return error_mark_node;
4695 /* Make sure all the element of the constructor were used. Otherwise,
4696 issue an error about exceeding initializers. */
4698 error ("too many initializers for %qT", type);
4703 /* Verify INIT (the initializer for DECL), and record the
4704 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
4705 grok_reference_init.
4707 If the return value is non-NULL, it is an expression that must be
4708 evaluated dynamically to initialize DECL. */
4711 check_initializer (tree decl, tree init, int flags, tree *cleanup)
4713 tree type = TREE_TYPE (decl);
4714 tree init_code = NULL;
4716 /* Things that are going to be initialized need to have complete
4718 TREE_TYPE (decl) = type = complete_type (TREE_TYPE (decl));
4720 if (type == error_mark_node)
4721 /* We will have already complained. */
4724 if (TREE_CODE (type) == ARRAY_TYPE)
4726 tree element_type = TREE_TYPE (type);
4728 /* The array type itself need not be complete, because the
4729 initializer may tell us how many elements are in the array.
4730 But, the elements of the array must be complete. */
4731 if (!COMPLETE_TYPE_P (complete_type (element_type)))
4733 error ("elements of array %q#D have incomplete type", decl);
4736 /* It is not valid to initialize a VLA. */
4738 && ((COMPLETE_TYPE_P (type) && !TREE_CONSTANT (TYPE_SIZE (type)))
4739 || !TREE_CONSTANT (TYPE_SIZE (element_type))))
4741 error ("variable-sized object %qD may not be initialized", decl);
4745 else if (!COMPLETE_TYPE_P (type))
4747 error ("%qD has incomplete type", decl);
4748 TREE_TYPE (decl) = error_mark_node;
4752 /* There is no way to make a variable-sized class type in GNU C++. */
4753 gcc_assert (TREE_CONSTANT (TYPE_SIZE (type)));
4755 if (!CP_AGGREGATE_TYPE_P (type)
4756 && init && BRACE_ENCLOSED_INITIALIZER_P (init)
4757 && VEC_length (constructor_elt, CONSTRUCTOR_ELTS (init)) != 1)
4759 error ("scalar object %qD requires one element in initializer", decl);
4760 TREE_TYPE (decl) = error_mark_node;
4764 if (TREE_CODE (decl) == CONST_DECL)
4766 gcc_assert (TREE_CODE (type) != REFERENCE_TYPE);
4768 DECL_INITIAL (decl) = init;
4770 gcc_assert (init != NULL_TREE);
4773 else if (!DECL_EXTERNAL (decl) && TREE_CODE (type) == REFERENCE_TYPE)
4774 init = grok_reference_init (decl, type, init, cleanup);
4777 /* Do not reshape constructors of vectors (they don't need to be
4779 if (TREE_CODE (init) == CONSTRUCTOR
4780 && !COMPOUND_LITERAL_P (init)
4781 && !TREE_TYPE (init)) /* ptrmemfunc */
4783 init = reshape_init (type, init);
4785 if ((*targetm.vector_opaque_p) (type))
4787 error ("opaque vector types cannot be initialized");
4788 init = error_mark_node;
4792 /* If DECL has an array type without a specific bound, deduce the
4793 array size from the initializer. */
4794 maybe_deduce_size_from_array_init (decl, init);
4795 type = TREE_TYPE (decl);
4796 if (type == error_mark_node)
4799 if (TYPE_HAS_CONSTRUCTOR (type) || TYPE_NEEDS_CONSTRUCTING (type))
4801 if (TREE_CODE (type) == ARRAY_TYPE)
4802 goto initialize_aggr;
4803 else if (TREE_CODE (init) == CONSTRUCTOR)
4805 if (TYPE_NON_AGGREGATE_CLASS (type))
4807 error ("%qD must be initialized by constructor, "
4810 init = error_mark_node;
4813 goto dont_use_constructor;
4817 int saved_stmts_are_full_exprs_p;
4820 saved_stmts_are_full_exprs_p = 0;
4821 if (building_stmt_tree ())
4823 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
4824 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
4826 init = build_aggr_init (decl, init, flags);
4827 if (building_stmt_tree ())
4828 current_stmt_tree ()->stmts_are_full_exprs_p =
4829 saved_stmts_are_full_exprs_p;
4835 dont_use_constructor:
4836 if (TREE_CODE (init) != TREE_VEC)
4838 init_code = store_init_value (decl, init);
4839 if (pedantic && TREE_CODE (type) == ARRAY_TYPE
4840 && DECL_INITIAL (decl)
4841 && TREE_CODE (DECL_INITIAL (decl)) == STRING_CST
4842 && PAREN_STRING_LITERAL_P (DECL_INITIAL (decl)))
4843 warning (0, "array %qD initialized by parenthesized string literal %qE",
4844 decl, DECL_INITIAL (decl));
4849 else if (DECL_EXTERNAL (decl))
4851 else if (TYPE_P (type) && TYPE_NEEDS_CONSTRUCTING (type))
4852 goto initialize_aggr;
4853 else if (IS_AGGR_TYPE (type))
4855 tree core_type = strip_array_types (type);
4857 if (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type))
4858 error ("structure %qD with uninitialized const members", decl);
4859 if (CLASSTYPE_REF_FIELDS_NEED_INIT (core_type))
4860 error ("structure %qD with uninitialized reference members", decl);
4862 check_for_uninitialized_const_var (decl);
4865 check_for_uninitialized_const_var (decl);
4867 if (init && init != error_mark_node)
4868 init_code = build2 (INIT_EXPR, type, decl, init);
4873 /* If DECL is not a local variable, give it RTL. */
4876 make_rtl_for_nonlocal_decl (tree decl, tree init, const char* asmspec)
4878 int toplev = toplevel_bindings_p ();
4880 const char *filename;
4882 /* Set the DECL_ASSEMBLER_NAME for the object. */
4885 /* The `register' keyword, when used together with an
4886 asm-specification, indicates that the variable should be
4887 placed in a particular register. */
4888 if (TREE_CODE (decl) == VAR_DECL && DECL_REGISTER (decl))
4890 set_user_assembler_name (decl, asmspec);
4891 DECL_HARD_REGISTER (decl) = 1;
4895 if (TREE_CODE (decl) == FUNCTION_DECL
4896 && DECL_BUILT_IN_CLASS (decl) == BUILT_IN_NORMAL)
4897 set_builtin_user_assembler_name (decl, asmspec);
4898 set_user_assembler_name (decl, asmspec);
4902 /* Handle non-variables up front. */
4903 if (TREE_CODE (decl) != VAR_DECL)
4905 rest_of_decl_compilation (decl, toplev, at_eof);
4909 /* If we see a class member here, it should be a static data
4911 if (DECL_LANG_SPECIFIC (decl) && DECL_IN_AGGR_P (decl))
4913 gcc_assert (TREE_STATIC (decl));
4914 /* An in-class declaration of a static data member should be
4915 external; it is only a declaration, and not a definition. */
4916 if (init == NULL_TREE)
4917 gcc_assert (DECL_EXTERNAL (decl));
4920 /* We don't create any RTL for local variables. */
4921 if (DECL_FUNCTION_SCOPE_P (decl) && !TREE_STATIC (decl))
4924 /* We defer emission of local statics until the corresponding
4925 DECL_EXPR is expanded. */
4926 defer_p = DECL_FUNCTION_SCOPE_P (decl) || DECL_VIRTUAL_P (decl);
4928 /* We try to defer namespace-scope static constants so that they are
4929 not emitted into the object file unnecessarily. */
4930 filename = input_filename;
4931 if (!DECL_VIRTUAL_P (decl)
4932 && TREE_READONLY (decl)
4933 && DECL_INITIAL (decl) != NULL_TREE
4934 && DECL_INITIAL (decl) != error_mark_node
4936 && ! EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl))
4938 && !TREE_PUBLIC (decl))
4940 /* Fool with the linkage of static consts according to #pragma
4942 struct c_fileinfo *finfo = get_fileinfo (filename);
4943 if (!finfo->interface_unknown && !TREE_PUBLIC (decl))
4945 TREE_PUBLIC (decl) = 1;
4946 DECL_EXTERNAL (decl) = finfo->interface_only;
4951 /* Likewise for template instantiations. */
4952 else if (DECL_LANG_SPECIFIC (decl)
4953 && DECL_IMPLICIT_INSTANTIATION (decl))
4956 /* If we're not deferring, go ahead and assemble the variable. */
4958 rest_of_decl_compilation (decl, toplev, at_eof);
4961 /* Generate code to initialize DECL (a local variable). */
4964 initialize_local_var (tree decl, tree init)
4966 tree type = TREE_TYPE (decl);
4969 gcc_assert (TREE_CODE (decl) == VAR_DECL
4970 || TREE_CODE (decl) == RESULT_DECL);
4971 gcc_assert (!TREE_STATIC (decl));
4973 if (DECL_SIZE (decl) == NULL_TREE)
4975 /* If we used it already as memory, it must stay in memory. */
4976 DECL_INITIAL (decl) = NULL_TREE;
4977 TREE_ADDRESSABLE (decl) = TREE_USED (decl);
4980 if (DECL_SIZE (decl) && type != error_mark_node)
4984 /* Compute and store the initial value. */
4985 already_used = TREE_USED (decl) || TREE_USED (type);
4987 /* Perform the initialization. */
4990 int saved_stmts_are_full_exprs_p;
4992 gcc_assert (building_stmt_tree ());
4993 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
4994 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
4995 finish_expr_stmt (init);
4996 current_stmt_tree ()->stmts_are_full_exprs_p =
4997 saved_stmts_are_full_exprs_p;
5000 /* Set this to 0 so we can tell whether an aggregate which was
5001 initialized was ever used. Don't do this if it has a
5002 destructor, so we don't complain about the 'resource
5003 allocation is initialization' idiom. Now set
5004 attribute((unused)) on types so decls of that type will be
5005 marked used. (see TREE_USED, above.) */
5006 if (TYPE_NEEDS_CONSTRUCTING (type)
5008 && TYPE_HAS_TRIVIAL_DESTRUCTOR (type)
5009 && DECL_NAME (decl))
5010 TREE_USED (decl) = 0;
5011 else if (already_used)
5012 TREE_USED (decl) = 1;
5015 /* Generate a cleanup, if necessary. */
5016 cleanup = cxx_maybe_build_cleanup (decl);
5017 if (DECL_SIZE (decl) && cleanup)
5018 finish_decl_cleanup (decl, cleanup);
5021 /* DECL is a VAR_DECL for a compiler-generated variable with static
5022 storage duration (like a virtual table) whose initializer is a
5023 compile-time constant. INIT must be either a TREE_LIST of values,
5024 or a CONSTRUCTOR. Initialize the variable and provide it to the
5028 initialize_artificial_var (tree decl, tree init)
5030 gcc_assert (DECL_ARTIFICIAL (decl));
5031 if (TREE_CODE (init) == TREE_LIST)
5032 init = build_constructor_from_list (NULL_TREE, init);
5033 gcc_assert (TREE_CODE (init) == CONSTRUCTOR);
5034 DECL_INITIAL (decl) = init;
5035 DECL_INITIALIZED_P (decl) = 1;
5036 determine_visibility (decl);
5037 layout_var_decl (decl);
5038 maybe_commonize_var (decl);
5039 make_rtl_for_nonlocal_decl (decl, init, /*asmspec=*/NULL);
5042 /* Finish processing of a declaration;
5043 install its line number and initial value.
5044 If the length of an array type is not known before,
5045 it must be determined now, from the initial value, or it is an error.
5047 INIT is the initializer (if any) for DECL. If INIT_CONST_EXPR_P is
5048 true, then INIT is an integral constant expression.
5050 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
5051 if the (init) syntax was used. */
5054 cp_finish_decl (tree decl, tree init, bool init_const_expr_p,
5055 tree asmspec_tree, int flags)
5059 const char *asmspec = NULL;
5060 int was_readonly = 0;
5061 bool var_definition_p = false;
5062 int saved_processing_template_decl;
5064 if (decl == error_mark_node)
5069 error ("assignment (not initialization) in declaration");
5073 gcc_assert (TREE_CODE (decl) != RESULT_DECL);
5074 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
5075 gcc_assert (TREE_CODE (decl) != PARM_DECL);
5077 type = TREE_TYPE (decl);
5078 if (type == error_mark_node)
5081 /* Assume no cleanup is required. */
5082 cleanup = NULL_TREE;
5083 saved_processing_template_decl = processing_template_decl;
5085 /* If a name was specified, get the string. */
5086 if (global_scope_p (current_binding_level))
5087 asmspec_tree = maybe_apply_renaming_pragma (decl, asmspec_tree);
5088 if (asmspec_tree && asmspec_tree != error_mark_node)
5089 asmspec = TREE_STRING_POINTER (asmspec_tree);
5091 if (current_class_type
5092 && CP_DECL_CONTEXT (decl) == current_class_type
5093 && TYPE_BEING_DEFINED (current_class_type)
5094 && (DECL_INITIAL (decl) || init))
5095 DECL_INITIALIZED_IN_CLASS_P (decl) = 1;
5097 if (processing_template_decl)
5099 bool type_dependent_p;
5101 /* Add this declaration to the statement-tree. */
5102 if (at_function_scope_p ())
5103 add_decl_expr (decl);
5105 type_dependent_p = dependent_type_p (type);
5107 if (init && init_const_expr_p)
5109 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl) = 1;
5110 if (DECL_INTEGRAL_CONSTANT_VAR_P (decl))
5111 TREE_CONSTANT (decl) = 1;
5115 || !DECL_CLASS_SCOPE_P (decl)
5116 || !DECL_INTEGRAL_CONSTANT_VAR_P (decl)
5118 || value_dependent_expression_p (init)
5119 /* Check also if initializer is a value dependent
5120 { integral_constant_expression }. */
5121 || (TREE_CODE (init) == CONSTRUCTOR
5122 && VEC_length (constructor_elt, CONSTRUCTOR_ELTS (init)) == 1
5123 && value_dependent_expression_p
5124 (VEC_index (constructor_elt,
5125 CONSTRUCTOR_ELTS (init), 0)->value)))
5128 DECL_INITIAL (decl) = init;
5129 if (TREE_CODE (decl) == VAR_DECL
5130 && !DECL_PRETTY_FUNCTION_P (decl)
5131 && !type_dependent_p)
5132 maybe_deduce_size_from_array_init (decl, init);
5136 init = fold_non_dependent_expr (init);
5137 processing_template_decl = 0;
5140 /* Take care of TYPE_DECLs up front. */
5141 if (TREE_CODE (decl) == TYPE_DECL)
5143 if (type != error_mark_node
5144 && IS_AGGR_TYPE (type) && DECL_NAME (decl))
5146 if (TREE_TYPE (DECL_NAME (decl)) && TREE_TYPE (decl) != type)
5147 warning (0, "shadowing previous type declaration of %q#D", decl);
5148 set_identifier_type_value (DECL_NAME (decl), decl);
5151 /* If we have installed this as the canonical typedef for this
5152 type, and that type has not been defined yet, delay emitting
5153 the debug information for it, as we will emit it later. */
5154 if (TYPE_MAIN_DECL (TREE_TYPE (decl)) == decl
5155 && !COMPLETE_TYPE_P (TREE_TYPE (decl)))
5156 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
5158 rest_of_decl_compilation (decl, DECL_CONTEXT (decl) == NULL_TREE,
5163 /* A reference will be modified here, as it is initialized. */
5164 if (! DECL_EXTERNAL (decl)
5165 && TREE_READONLY (decl)
5166 && TREE_CODE (type) == REFERENCE_TYPE)
5169 TREE_READONLY (decl) = 0;
5172 if (TREE_CODE (decl) == VAR_DECL)
5174 /* Only PODs can have thread-local storage. Other types may require
5175 various kinds of non-trivial initialization. */
5176 if (DECL_THREAD_LOCAL_P (decl) && !pod_type_p (TREE_TYPE (decl)))
5177 error ("%qD cannot be thread-local because it has non-POD type %qT",
5178 decl, TREE_TYPE (decl));
5179 /* If this is a local variable that will need a mangled name,
5180 register it now. We must do this before processing the
5181 initializer for the variable, since the initialization might
5182 require a guard variable, and since the mangled name of the
5183 guard variable will depend on the mangled name of this
5185 if (!processing_template_decl
5186 && DECL_FUNCTION_SCOPE_P (decl)
5187 && TREE_STATIC (decl)
5188 && !DECL_ARTIFICIAL (decl))
5189 push_local_name (decl);
5190 /* Convert the initializer to the type of DECL, if we have not
5191 already initialized DECL. */
5192 if (!DECL_INITIALIZED_P (decl)
5193 /* If !DECL_EXTERNAL then DECL is being defined. In the
5194 case of a static data member initialized inside the
5195 class-specifier, there can be an initializer even if DECL
5196 is *not* defined. */
5197 && (!DECL_EXTERNAL (decl) || init))
5201 DECL_NONTRIVIALLY_INITIALIZED_P (decl) = 1;
5202 if (init_const_expr_p)
5204 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl) = 1;
5205 if (DECL_INTEGRAL_CONSTANT_VAR_P (decl))
5206 TREE_CONSTANT (decl) = 1;
5209 init = check_initializer (decl, init, flags, &cleanup);
5210 /* Thread-local storage cannot be dynamically initialized. */
5211 if (DECL_THREAD_LOCAL_P (decl) && init)
5213 error ("%qD is thread-local and so cannot be dynamically "
5214 "initialized", decl);
5218 /* Check that the initializer for a static data member was a
5219 constant. Although we check in the parser that the
5220 initializer is an integral constant expression, we do not
5221 simplify division-by-zero at the point at which it
5222 occurs. Therefore, in:
5224 struct S { static const int i = 7 / 0; };
5226 we issue an error at this point. It would
5227 probably be better to forbid division by zero in
5228 integral constant expressions. */
5229 if (DECL_EXTERNAL (decl) && init)
5231 error ("%qD cannot be initialized by a non-constant expression"
5232 " when being declared", decl);
5233 DECL_INITIALIZED_IN_CLASS_P (decl) = 0;
5241 The memory occupied by any object of static storage
5242 duration is zero-initialized at program startup before
5243 any other initialization takes place.
5245 We cannot create an appropriate initializer until after
5246 the type of DECL is finalized. If DECL_INITIAL is set,
5247 then the DECL is statically initialized, and any
5248 necessary zero-initialization has already been performed. */
5249 if (TREE_STATIC (decl) && !DECL_INITIAL (decl))
5250 DECL_INITIAL (decl) = build_zero_init (TREE_TYPE (decl),
5251 /*nelts=*/NULL_TREE,
5252 /*static_storage_p=*/true);
5253 /* Remember that the initialization for this variable has
5255 DECL_INITIALIZED_P (decl) = 1;
5256 /* This declaration is the definition of this variable,
5257 unless we are initializing a static data member within
5258 the class specifier. */
5259 if (!DECL_EXTERNAL (decl))
5260 var_definition_p = true;
5262 /* If the variable has an array type, lay out the type, even if
5263 there is no initializer. It is valid to index through the
5264 array, and we must get TYPE_ALIGN set correctly on the array
5266 else if (TREE_CODE (type) == ARRAY_TYPE)
5270 /* Add this declaration to the statement-tree. This needs to happen
5271 after the call to check_initializer so that the DECL_EXPR for a
5272 reference temp is added before the DECL_EXPR for the reference itself. */
5273 if (at_function_scope_p ())
5274 add_decl_expr (decl);
5276 /* Let the middle end know about variables and functions -- but not
5277 static data members in uninstantiated class templates. */
5278 if (!saved_processing_template_decl
5279 && (TREE_CODE (decl) == VAR_DECL
5280 || TREE_CODE (decl) == FUNCTION_DECL))
5282 if (TREE_CODE (decl) == VAR_DECL)
5284 layout_var_decl (decl);
5285 maybe_commonize_var (decl);
5286 if (DECL_NAMESPACE_SCOPE_P (decl) && !TREE_PUBLIC (decl)
5287 && !DECL_THIS_STATIC (decl) && !DECL_ARTIFICIAL (decl))
5289 /* This is a const variable with implicit 'static'. Set
5290 DECL_THIS_STATIC so we can tell it from variables that are
5291 !TREE_PUBLIC because of the anonymous namespace. */
5292 DECL_THIS_STATIC (decl) = 1;
5296 make_rtl_for_nonlocal_decl (decl, init, asmspec);
5298 /* Check for abstractness of the type. Notice that there is no
5299 need to strip array types here since the check for those types
5300 is already done within create_array_type_for_decl. */
5301 if (TREE_CODE (type) == FUNCTION_TYPE
5302 || TREE_CODE (type) == METHOD_TYPE)
5303 abstract_virtuals_error (decl, TREE_TYPE (type));
5305 abstract_virtuals_error (decl, type);
5307 /* This needs to happen after the linkage is set. */
5308 determine_visibility (decl);
5310 if (TREE_CODE (decl) == FUNCTION_DECL
5311 || TREE_TYPE (decl) == error_mark_node)
5312 /* No initialization required. */
5314 else if (DECL_EXTERNAL (decl)
5315 && ! (DECL_LANG_SPECIFIC (decl)
5316 && DECL_NOT_REALLY_EXTERN (decl)))
5319 DECL_INITIAL (decl) = init;
5323 /* A variable definition. */
5324 if (DECL_FUNCTION_SCOPE_P (decl))
5326 /* Initialize the local variable. */
5327 if (processing_template_decl)
5328 DECL_INITIAL (decl) = init;
5329 else if (!TREE_STATIC (decl))
5330 initialize_local_var (decl, init);
5333 /* If a variable is defined, and then a subsequent
5334 definition with external linkage is encountered, we will
5335 get here twice for the same variable. We want to avoid
5336 calling expand_static_init more than once. For variables
5337 that are not static data members, we can call
5338 expand_static_init only when we actually process the
5339 initializer. It is not legal to redeclare a static data
5340 member, so this issue does not arise in that case. */
5341 if (var_definition_p && TREE_STATIC (decl))
5342 expand_static_init (decl, init);
5346 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
5347 reference, insert it in the statement-tree now. */
5349 push_cleanup (decl, cleanup, false);
5352 processing_template_decl = saved_processing_template_decl;
5355 TREE_READONLY (decl) = 1;
5357 /* If this was marked 'used', be sure it will be output. */
5358 if (lookup_attribute ("used", DECL_ATTRIBUTES (decl)))
5359 mark_decl_referenced (decl);
5362 /* This is here for a midend callback from c-common.c. */
5365 finish_decl (tree decl, tree init, tree asmspec_tree)
5367 cp_finish_decl (decl, init, /*init_const_expr_p=*/false, asmspec_tree, 0);
5370 /* Returns a declaration for a VAR_DECL as if:
5372 extern "C" TYPE NAME;
5374 had been seen. Used to create compiler-generated global
5378 declare_global_var (tree name, tree type)
5382 push_to_top_level ();
5383 decl = build_decl (VAR_DECL, name, type);
5384 TREE_PUBLIC (decl) = 1;
5385 DECL_EXTERNAL (decl) = 1;
5386 DECL_ARTIFICIAL (decl) = 1;
5387 /* If the user has explicitly declared this variable (perhaps
5388 because the code we are compiling is part of a low-level runtime
5389 library), then it is possible that our declaration will be merged
5390 with theirs by pushdecl. */
5391 decl = pushdecl (decl);
5392 finish_decl (decl, NULL_TREE, NULL_TREE);
5393 pop_from_top_level ();
5398 /* Returns a pointer to the `atexit' function. Note that if
5399 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
5400 `__cxa_atexit' function specified in the IA64 C++ ABI. */
5403 get_atexit_node (void)
5410 bool use_aeabi_atexit;
5415 if (flag_use_cxa_atexit && !targetm.cxx.use_atexit_for_cxa_atexit ())
5417 /* The declaration for `__cxa_atexit' is:
5419 int __cxa_atexit (void (*)(void *), void *, void *)
5421 We build up the argument types and then then function type
5424 use_aeabi_atexit = targetm.cxx.use_aeabi_atexit ();
5425 /* First, build the pointer-to-function type for the first
5427 arg_types = tree_cons (NULL_TREE, ptr_type_node, void_list_node);
5428 fn_type = build_function_type (void_type_node, arg_types);
5429 fn_ptr_type = build_pointer_type (fn_type);
5430 /* Then, build the rest of the argument types. */
5431 arg_types = tree_cons (NULL_TREE, ptr_type_node, void_list_node);
5432 if (use_aeabi_atexit)
5434 arg_types = tree_cons (NULL_TREE, fn_ptr_type, arg_types);
5435 arg_types = tree_cons (NULL_TREE, ptr_type_node, arg_types);
5439 arg_types = tree_cons (NULL_TREE, ptr_type_node, arg_types);
5440 arg_types = tree_cons (NULL_TREE, fn_ptr_type, arg_types);
5442 /* And the final __cxa_atexit type. */
5443 fn_type = build_function_type (integer_type_node, arg_types);
5444 fn_ptr_type = build_pointer_type (fn_type);
5445 if (use_aeabi_atexit)
5446 name = "__aeabi_atexit";
5448 name = "__cxa_atexit";
5452 /* The declaration for `atexit' is:
5454 int atexit (void (*)());
5456 We build up the argument types and then then function type
5458 fn_type = build_function_type (void_type_node, void_list_node);
5459 fn_ptr_type = build_pointer_type (fn_type);
5460 arg_types = tree_cons (NULL_TREE, fn_ptr_type, void_list_node);
5461 /* Build the final atexit type. */
5462 fn_type = build_function_type (integer_type_node, arg_types);
5466 /* Now, build the function declaration. */
5467 push_lang_context (lang_name_c);
5468 atexit_fndecl = build_library_fn_ptr (name, fn_type);
5469 mark_used (atexit_fndecl);
5470 pop_lang_context ();
5471 atexit_node = decay_conversion (atexit_fndecl);
5476 /* Returns the __dso_handle VAR_DECL. */
5479 get_dso_handle_node (void)
5481 if (dso_handle_node)
5482 return dso_handle_node;
5484 /* Declare the variable. */
5485 dso_handle_node = declare_global_var (get_identifier ("__dso_handle"),
5488 return dso_handle_node;
5491 /* Begin a new function with internal linkage whose job will be simply
5492 to destroy some particular variable. */
5494 static GTY(()) int start_cleanup_cnt;
5497 start_cleanup_fn (void)
5503 bool use_cxa_atexit = flag_use_cxa_atexit
5504 && !targetm.cxx.use_atexit_for_cxa_atexit ();
5506 push_to_top_level ();
5508 /* No need to mangle this. */
5509 push_lang_context (lang_name_c);
5511 /* Build the parameter-types. */
5512 parmtypes = void_list_node;
5513 /* Functions passed to __cxa_atexit take an additional parameter.
5514 We'll just ignore it. After we implement the new calling
5515 convention for destructors, we can eliminate the use of
5516 additional cleanup functions entirely in the -fnew-abi case. */
5518 parmtypes = tree_cons (NULL_TREE, ptr_type_node, parmtypes);
5519 /* Build the function type itself. */
5520 fntype = build_function_type (void_type_node, parmtypes);
5521 /* Build the name of the function. */
5522 sprintf (name, "__tcf_%d", start_cleanup_cnt++);
5523 /* Build the function declaration. */
5524 fndecl = build_lang_decl (FUNCTION_DECL, get_identifier (name), fntype);
5525 /* It's a function with internal linkage, generated by the
5527 TREE_PUBLIC (fndecl) = 0;
5528 DECL_ARTIFICIAL (fndecl) = 1;
5529 /* Make the function `inline' so that it is only emitted if it is
5530 actually needed. It is unlikely that it will be inlined, since
5531 it is only called via a function pointer, but we avoid unnecessary
5532 emissions this way. */
5533 DECL_INLINE (fndecl) = 1;
5534 DECL_DECLARED_INLINE_P (fndecl) = 1;
5535 DECL_INTERFACE_KNOWN (fndecl) = 1;
5536 /* Build the parameter. */
5541 parmdecl = cp_build_parm_decl (NULL_TREE, ptr_type_node);
5542 DECL_CONTEXT (parmdecl) = fndecl;
5543 TREE_USED (parmdecl) = 1;
5544 DECL_ARGUMENTS (fndecl) = parmdecl;
5548 start_preparsed_function (fndecl, NULL_TREE, SF_PRE_PARSED);
5550 pop_lang_context ();
5552 return current_function_decl;
5555 /* Finish the cleanup function begun by start_cleanup_fn. */
5558 end_cleanup_fn (void)
5560 expand_or_defer_fn (finish_function (0));
5562 pop_from_top_level ();
5565 /* Generate code to handle the destruction of DECL, an object with
5566 static storage duration. */
5569 register_dtor_fn (tree decl)
5576 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
5577 return void_zero_node;
5579 /* Call build_cleanup before we enter the anonymous function so that
5580 any access checks will be done relative to the current scope,
5581 rather than the scope of the anonymous function. */
5582 build_cleanup (decl);
5584 /* Now start the function. */
5585 cleanup = start_cleanup_fn ();
5587 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
5588 to the original function, rather than the anonymous one. That
5589 will make the back end think that nested functions are in use,
5590 which causes confusion. */
5592 push_deferring_access_checks (dk_no_check);
5593 fcall = build_cleanup (decl);
5594 pop_deferring_access_checks ();
5596 /* Create the body of the anonymous function. */
5597 compound_stmt = begin_compound_stmt (BCS_FN_BODY);
5598 finish_expr_stmt (fcall);
5599 finish_compound_stmt (compound_stmt);
5602 /* Call atexit with the cleanup function. */
5603 cxx_mark_addressable (cleanup);
5604 mark_used (cleanup);
5605 cleanup = build_unary_op (ADDR_EXPR, cleanup, 0);
5606 if (flag_use_cxa_atexit && !targetm.cxx.use_atexit_for_cxa_atexit ())
5608 args = tree_cons (NULL_TREE,
5609 build_unary_op (ADDR_EXPR, get_dso_handle_node (), 0),
5611 if (targetm.cxx.use_aeabi_atexit ())
5613 args = tree_cons (NULL_TREE, cleanup, args);
5614 args = tree_cons (NULL_TREE, null_pointer_node, args);
5618 args = tree_cons (NULL_TREE, null_pointer_node, args);
5619 args = tree_cons (NULL_TREE, cleanup, args);
5623 args = tree_cons (NULL_TREE, cleanup, NULL_TREE);
5624 return build_function_call (get_atexit_node (), args);
5627 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
5628 is its initializer. Generate code to handle the construction
5629 and destruction of DECL. */
5632 expand_static_init (tree decl, tree init)
5634 gcc_assert (TREE_CODE (decl) == VAR_DECL);
5635 gcc_assert (TREE_STATIC (decl));
5637 /* Some variables require no initialization. */
5639 && !TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl))
5640 && TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
5643 if (DECL_FUNCTION_SCOPE_P (decl))
5645 /* Emit code to perform this initialization but once. */
5646 tree if_stmt = NULL_TREE, inner_if_stmt = NULL_TREE;
5647 tree then_clause = NULL_TREE, inner_then_clause = NULL_TREE;
5648 tree guard, guard_addr;
5649 tree acquire_fn, release_fn, abort_fn;
5652 /* Emit code to perform this initialization but once. This code
5655 static <type> guard;
5656 if (!guard.first_byte) {
5657 if (__cxa_guard_acquire (&guard)) {
5660 // Do initialization.
5661 flag = true; __cxa_guard_release (&guard);
5662 // Register variable for destruction at end of program.
5664 if (!flag) __cxa_guard_abort (&guard);
5668 Note that the `flag' variable is only set to 1 *after* the
5669 initialization is complete. This ensures that an exception,
5670 thrown during the construction, will cause the variable to
5671 reinitialized when we pass through this code again, as per:
5675 If the initialization exits by throwing an exception, the
5676 initialization is not complete, so it will be tried again
5677 the next time control enters the declaration.
5679 This process should be thread-safe, too; multiple threads
5680 should not be able to initialize the variable more than
5683 /* Create the guard variable. */
5684 guard = get_guard (decl);
5686 /* This optimization isn't safe on targets with relaxed memory
5687 consistency. On such targets we force synchronization in
5688 __cxa_guard_acquire. */
5689 if (!targetm.relaxed_ordering || !flag_threadsafe_statics)
5691 /* Begin the conditional initialization. */
5692 if_stmt = begin_if_stmt ();
5693 finish_if_stmt_cond (get_guard_cond (guard), if_stmt);
5694 then_clause = begin_compound_stmt (BCS_NO_SCOPE);
5697 if (flag_threadsafe_statics)
5699 guard_addr = build_address (guard);
5701 acquire_fn = get_identifier ("__cxa_guard_acquire");
5702 release_fn = get_identifier ("__cxa_guard_release");
5703 abort_fn = get_identifier ("__cxa_guard_abort");
5704 if (!get_global_value_if_present (acquire_fn, &acquire_fn))
5706 tree argtypes = tree_cons (NULL_TREE, TREE_TYPE (guard_addr),
5708 tree vfntype = build_function_type (void_type_node, argtypes);
5709 acquire_fn = push_library_fn
5710 (acquire_fn, build_function_type (integer_type_node, argtypes));
5711 release_fn = push_library_fn (release_fn, vfntype);
5712 abort_fn = push_library_fn (abort_fn, vfntype);
5716 release_fn = identifier_global_value (release_fn);
5717 abort_fn = identifier_global_value (abort_fn);
5720 inner_if_stmt = begin_if_stmt ();
5721 finish_if_stmt_cond (build_call_n (acquire_fn, 1, guard_addr),
5724 inner_then_clause = begin_compound_stmt (BCS_NO_SCOPE);
5725 begin = get_target_expr (boolean_false_node);
5726 flag = TARGET_EXPR_SLOT (begin);
5728 TARGET_EXPR_CLEANUP (begin)
5729 = build3 (COND_EXPR, void_type_node, flag,
5731 build_call_n (abort_fn, 1, guard_addr));
5732 CLEANUP_EH_ONLY (begin) = 1;
5734 /* Do the initialization itself. */
5735 init = add_stmt_to_compound (begin, init);
5736 init = add_stmt_to_compound
5737 (init, build2 (MODIFY_EXPR, void_type_node, flag, boolean_true_node));
5738 init = add_stmt_to_compound
5739 (init, build_call_n (release_fn, 1, guard_addr));
5742 init = add_stmt_to_compound (init, set_guard (guard));
5744 /* Use atexit to register a function for destroying this static
5746 init = add_stmt_to_compound (init, register_dtor_fn (decl));
5748 finish_expr_stmt (init);
5750 if (flag_threadsafe_statics)
5752 finish_compound_stmt (inner_then_clause);
5753 finish_then_clause (inner_if_stmt);
5754 finish_if_stmt (inner_if_stmt);
5757 if (!targetm.relaxed_ordering || !flag_threadsafe_statics)
5759 finish_compound_stmt (then_clause);
5760 finish_then_clause (if_stmt);
5761 finish_if_stmt (if_stmt);
5765 static_aggregates = tree_cons (init, decl, static_aggregates);
5769 /* Make TYPE a complete type based on INITIAL_VALUE.
5770 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
5771 2 if there was no information (in which case assume 0 if DO_DEFAULT),
5772 3 if the initializer list is empty (in pedantic mode). */
5775 cp_complete_array_type (tree *ptype, tree initial_value, bool do_default)
5778 tree type, elt_type;
5782 /* An array of character type can be initialized from a
5783 brace-enclosed string constant.
5785 FIXME: this code is duplicated from reshape_init. Probably
5786 we should just call reshape_init here? */
5787 if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (*ptype)))
5788 && TREE_CODE (initial_value) == CONSTRUCTOR
5789 && !VEC_empty (constructor_elt, CONSTRUCTOR_ELTS (initial_value)))
5791 VEC(constructor_elt,gc) *v = CONSTRUCTOR_ELTS (initial_value);
5792 tree value = VEC_index (constructor_elt, v, 0)->value;
5794 if (TREE_CODE (value) == STRING_CST
5795 && VEC_length (constructor_elt, v) == 1)
5796 initial_value = value;
5800 failure = complete_array_type (ptype, initial_value, do_default);
5802 /* We can create the array before the element type is complete, which
5803 means that we didn't have these two bits set in the original type
5804 either. In completing the type, we are expected to propagate these
5805 bits. See also complete_type which does the same thing for arrays
5808 if (TYPE_DOMAIN (type))
5810 elt_type = TREE_TYPE (type);
5811 TYPE_NEEDS_CONSTRUCTING (type) = TYPE_NEEDS_CONSTRUCTING (elt_type);
5812 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type)
5813 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (elt_type);
5819 /* Return zero if something is declared to be a member of type
5820 CTYPE when in the context of CUR_TYPE. STRING is the error
5821 message to print in that case. Otherwise, quietly return 1. */
5824 member_function_or_else (tree ctype, tree cur_type, enum overload_flags flags)
5826 if (ctype && ctype != cur_type)
5828 if (flags == DTOR_FLAG)
5829 error ("destructor for alien class %qT cannot be a member", ctype);
5831 error ("constructor for alien class %qT cannot be a member", ctype);
5837 /* Subroutine of `grokdeclarator'. */
5839 /* Generate errors possibly applicable for a given set of specifiers.
5840 This is for ARM $7.1.2. */
5843 bad_specifiers (tree object,
5852 error ("%qD declared as a %<virtual%> %s", object, type);
5854 error ("%qD declared as an %<inline%> %s", object, type);
5856 error ("%<const%> and %<volatile%> function specifiers on "
5857 "%qD invalid in %s declaration",
5860 error ("%q+D declared as a friend", object);
5862 && (TREE_CODE (object) == TYPE_DECL
5863 || (!TYPE_PTRFN_P (TREE_TYPE (object))
5864 && !TYPE_REFFN_P (TREE_TYPE (object))
5865 && !TYPE_PTRMEMFUNC_P (TREE_TYPE (object)))))
5866 error ("%q+D declared with an exception specification", object);
5869 /* DECL is a member function or static data member and is presently
5870 being defined. Check that the definition is taking place in a
5874 check_class_member_definition_namespace (tree decl)
5876 /* These checks only apply to member functions and static data
5878 gcc_assert (TREE_CODE (decl) == FUNCTION_DECL
5879 || TREE_CODE (decl) == VAR_DECL);
5880 /* We check for problems with specializations in pt.c in
5881 check_specialization_namespace, where we can issue better
5883 if (processing_specialization)
5885 /* There are no restrictions on the placement of
5886 explicit instantiations. */
5887 if (processing_explicit_instantiation)
5891 A member function definition that appears outside of the
5892 class definition shall appear in a namespace scope enclosing
5893 the class definition.
5897 The definition for a static data member shall appear in a
5898 namespace scope enclosing the member's class definition. */
5899 if (!is_ancestor (current_namespace, DECL_CONTEXT (decl)))
5900 pedwarn ("definition of %qD is not in namespace enclosing %qT",
5901 decl, DECL_CONTEXT (decl));
5904 /* Build a PARM_DECL for the "this" parameter. TYPE is the
5905 METHOD_TYPE for a non-static member function; QUALS are the
5906 cv-qualifiers that apply to the function. */
5909 build_this_parm (tree type, cp_cv_quals quals)
5914 cp_cv_quals this_quals;
5916 this_type = TREE_VALUE (TYPE_ARG_TYPES (type));
5917 /* The `this' parameter is implicitly `const'; it cannot be
5919 this_quals = (quals & TYPE_QUAL_RESTRICT) | TYPE_QUAL_CONST;
5920 qual_type = cp_build_qualified_type (this_type, this_quals);
5921 parm = build_artificial_parm (this_identifier, qual_type);
5922 cp_apply_type_quals_to_decl (this_quals, parm);
5926 /* CTYPE is class type, or null if non-class.
5927 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
5929 DECLARATOR is the function's name.
5930 PARMS is a chain of PARM_DECLs for the function.
5931 VIRTUALP is truthvalue of whether the function is virtual or not.
5932 FLAGS are to be passed through to `grokclassfn'.
5933 QUALS are qualifiers indicating whether the function is `const'
5935 RAISES is a list of exceptions that this function can raise.
5936 CHECK is 1 if we must find this method in CTYPE, 0 if we should
5937 not look, and -1 if we should not call `grokclassfn' at all.
5939 SFK is the kind of special function (if any) for the new function.
5941 Returns `NULL_TREE' if something goes wrong, after issuing
5942 applicable error messages. */
5945 grokfndecl (tree ctype,
5949 tree orig_declarator,
5951 enum overload_flags flags,
5958 special_function_kind sfk,
5965 int staticp = ctype && TREE_CODE (type) == FUNCTION_TYPE;
5969 type = build_exception_variant (type, raises);
5971 decl = build_lang_decl (FUNCTION_DECL, declarator, type);
5972 if (TREE_CODE (type) == METHOD_TYPE)
5975 parm = build_this_parm (type, quals);
5976 TREE_CHAIN (parm) = parms;
5979 DECL_ARGUMENTS (decl) = parms;
5980 /* Propagate volatile out from type to decl. */
5981 if (TYPE_VOLATILE (type))
5982 TREE_THIS_VOLATILE (decl) = 1;
5985 && TREE_CODE (orig_declarator) == TEMPLATE_ID_EXPR)
5989 ("defining explicit specialization %qD in friend declaration",
5993 tree fns = TREE_OPERAND (orig_declarator, 0);
5994 tree args = TREE_OPERAND (orig_declarator, 1);
5996 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
5998 /* Something like `template <class T> friend void f<T>()'. */
5999 error ("invalid use of template-id %qD in declaration "
6000 "of primary template",
6006 /* A friend declaration of the form friend void f<>(). Record
6007 the information in the TEMPLATE_ID_EXPR. */
6008 SET_DECL_IMPLICIT_INSTANTIATION (decl);
6010 if (TREE_CODE (fns) == COMPONENT_REF)
6012 /* Due to bison parser ickiness, we will have already looked
6013 up an operator_name or PFUNCNAME within the current class
6014 (see template_id in parse.y). If the current class contains
6015 such a name, we'll get a COMPONENT_REF here. Undo that. */
6017 gcc_assert (TREE_TYPE (TREE_OPERAND (fns, 0))
6018 == current_class_type);
6019 fns = TREE_OPERAND (fns, 1);
6021 gcc_assert (TREE_CODE (fns) == IDENTIFIER_NODE
6022 || TREE_CODE (fns) == OVERLOAD);
6023 DECL_TEMPLATE_INFO (decl) = tree_cons (fns, args, NULL_TREE);
6025 for (t = TYPE_ARG_TYPES (TREE_TYPE (decl)); t; t = TREE_CHAIN (t))
6026 if (TREE_PURPOSE (t)
6027 && TREE_CODE (TREE_PURPOSE (t)) == DEFAULT_ARG)
6029 error ("default arguments are not allowed in declaration "
6030 "of friend template specialization %qD",
6037 error ("%<inline%> is not allowed in declaration of friend "
6038 "template specialization %qD",
6045 /* If this decl has namespace scope, set that up. */
6047 set_decl_namespace (decl, in_namespace, friendp);
6049 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
6051 /* `main' and builtins have implicit 'C' linkage. */
6052 if ((MAIN_NAME_P (declarator)
6053 || (IDENTIFIER_LENGTH (declarator) > 10
6054 && IDENTIFIER_POINTER (declarator)[0] == '_'
6055 && IDENTIFIER_POINTER (declarator)[1] == '_'
6056 && strncmp (IDENTIFIER_POINTER (declarator)+2, "builtin_", 8) == 0))
6057 && current_lang_name == lang_name_cplusplus
6058 && ctype == NULL_TREE
6059 /* NULL_TREE means global namespace. */
6060 && DECL_CONTEXT (decl) == NULL_TREE)
6061 SET_DECL_LANGUAGE (decl, lang_c);
6063 /* Should probably propagate const out from type to decl I bet (mrs). */
6066 DECL_STATIC_FUNCTION_P (decl) = 1;
6067 DECL_CONTEXT (decl) = ctype;
6072 DECL_CONTEXT (decl) = ctype;
6074 check_class_member_definition_namespace (decl);
6077 if (ctype == NULL_TREE && DECL_MAIN_P (decl))
6079 if (processing_template_decl)
6080 error ("cannot declare %<::main%> to be a template");
6082 error ("cannot declare %<::main%> to be inline");
6084 error ("cannot declare %<::main%> to be static");
6089 /* Members of anonymous types and local classes have no linkage; make
6090 them internal. If a typedef is made later, this will be changed. */
6091 if (ctype && (TYPE_ANONYMOUS_P (ctype)
6092 || decl_function_context (TYPE_MAIN_DECL (ctype))))
6097 /* [basic.link]: A name with no linkage (notably, the name of a class
6098 or enumeration declared in a local scope) shall not be used to
6099 declare an entity with linkage.
6101 Only check this for public decls for now. See core 319, 389. */
6102 t = no_linkage_check (TREE_TYPE (decl),
6103 /*relaxed_p=*/false);
6106 if (TYPE_ANONYMOUS_P (t))
6108 if (DECL_EXTERN_C_P (decl))
6109 /* Allow this; it's pretty common in C. */;
6112 pedwarn ("non-local function %q#D uses anonymous type",
6114 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
6115 pedwarn ("%q+#D does not refer to the unqualified "
6116 "type, so it is not used for linkage",
6121 pedwarn ("non-local function %q#D uses local type %qT", decl, t);
6125 TREE_PUBLIC (decl) = publicp;
6128 DECL_INTERFACE_KNOWN (decl) = 1;
6129 DECL_NOT_REALLY_EXTERN (decl) = 1;
6132 /* If the declaration was declared inline, mark it as such. */
6134 DECL_DECLARED_INLINE_P (decl) = 1;
6135 /* We inline functions that are explicitly declared inline, or, when
6136 the user explicitly asks us to, all functions. */
6137 if (DECL_DECLARED_INLINE_P (decl)
6138 || (flag_inline_trees == 2 && !DECL_INLINE (decl) && funcdef_flag))
6139 DECL_INLINE (decl) = 1;
6141 DECL_EXTERNAL (decl) = 1;
6142 if (quals && TREE_CODE (type) == FUNCTION_TYPE)
6145 ? G_("static member function %qD cannot have cv-qualifier")
6146 : G_("non-member function %qD cannot have cv-qualifier"),
6148 quals = TYPE_UNQUALIFIED;
6151 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl))
6152 && !grok_op_properties (decl, /*complain=*/true))
6155 if (ctype && decl_function_context (decl))
6156 DECL_NO_STATIC_CHAIN (decl) = 1;
6159 /* Make the init_value nonzero so pushdecl knows this is not
6160 tentative. error_mark_node is replaced later with the BLOCK. */
6161 DECL_INITIAL (decl) = error_mark_node;
6163 if (TYPE_NOTHROW_P (type) || nothrow_libfn_p (decl))
6164 TREE_NOTHROW (decl) = 1;
6166 /* Caller will do the rest of this. */
6170 if (ctype != NULL_TREE)
6172 if (sfk == sfk_constructor)
6173 DECL_CONSTRUCTOR_P (decl) = 1;
6175 grokclassfn (ctype, decl, flags);
6178 decl = check_explicit_specialization (orig_declarator, decl,
6181 4 * (friendp != 0));
6182 if (decl == error_mark_node)
6187 cplus_decl_attributes (&decl, *attrlist, 0);
6188 *attrlist = NULL_TREE;
6191 /* Check main's type after attributes have been applied. */
6192 if (ctype == NULL_TREE && DECL_MAIN_P (decl))
6194 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl)),
6197 tree oldtypeargs = TYPE_ARG_TYPES (TREE_TYPE (decl));
6199 error ("%<::main%> must return %<int%>");
6200 newtype = build_function_type (integer_type_node, oldtypeargs);
6201 TREE_TYPE (decl) = newtype;
6203 check_main_parameter_types (decl);
6206 if (ctype != NULL_TREE
6207 && (! TYPE_FOR_JAVA (ctype) || check_java_method (decl))
6212 old_decl = check_classfn (ctype, decl,
6213 (processing_template_decl
6214 > template_class_depth (ctype))
6215 ? current_template_parms
6222 if (TREE_CODE (old_decl) == TEMPLATE_DECL)
6223 /* Because grokfndecl is always supposed to return a
6224 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
6225 here. We depend on our callers to figure out that its
6226 really a template that's being returned. */
6227 old_decl = DECL_TEMPLATE_RESULT (old_decl);
6229 if (DECL_STATIC_FUNCTION_P (old_decl)
6230 && TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE)
6231 /* Remove the `this' parm added by grokclassfn.
6232 XXX Isn't this done in start_function, too? */
6233 revert_static_member_fn (decl);
6234 if (DECL_ARTIFICIAL (old_decl))
6235 error ("definition of implicitly-declared %qD", old_decl);
6237 /* Since we've smashed OLD_DECL to its
6238 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
6239 if (TREE_CODE (decl) == TEMPLATE_DECL)
6240 decl = DECL_TEMPLATE_RESULT (decl);
6242 /* Attempt to merge the declarations. This can fail, in
6243 the case of some invalid specialization declarations. */
6244 pushed_scope = push_scope (ctype);
6245 ok = duplicate_decls (decl, old_decl, friendp);
6247 pop_scope (pushed_scope);
6250 error ("no %q#D member function declared in class %qT",
6258 if (DECL_CONSTRUCTOR_P (decl) && !grok_ctor_properties (ctype, decl))
6261 if (ctype == NULL_TREE || check)
6265 DECL_VIRTUAL_P (decl) = 1;
6270 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
6271 the linkage that DECL will receive in the object file. */
6274 set_linkage_for_static_data_member (tree decl)
6276 /* A static data member always has static storage duration and
6277 external linkage. Note that static data members are forbidden in
6278 local classes -- the only situation in which a class has
6279 non-external linkage. */
6280 TREE_PUBLIC (decl) = 1;
6281 TREE_STATIC (decl) = 1;
6282 /* For non-template classes, static data members are always put
6283 out in exactly those files where they are defined, just as
6284 with ordinary namespace-scope variables. */
6285 if (!processing_template_decl)
6286 DECL_INTERFACE_KNOWN (decl) = 1;
6289 /* Create a VAR_DECL named NAME with the indicated TYPE.
6291 If SCOPE is non-NULL, it is the class type or namespace containing
6292 the variable. If SCOPE is NULL, the variable should is created in
6293 the innermost enclosings scope. */
6296 grokvardecl (tree type,
6298 const cp_decl_specifier_seq *declspecs,
6304 tree explicit_scope;
6306 gcc_assert (!name || TREE_CODE (name) == IDENTIFIER_NODE);
6308 /* Compute the scope in which to place the variable, but remember
6309 whether or not that scope was explicitly specified by the user. */
6310 explicit_scope = scope;
6313 /* An explicit "extern" specifier indicates a namespace-scope
6315 if (declspecs->storage_class == sc_extern)
6316 scope = current_namespace;
6317 else if (!at_function_scope_p ())
6318 scope = current_scope ();
6322 && (/* If the variable is a namespace-scope variable declared in a
6323 template, we need DECL_LANG_SPECIFIC. */
6324 (TREE_CODE (scope) == NAMESPACE_DECL && processing_template_decl)
6325 /* Similarly for namespace-scope variables with language linkage
6327 || (TREE_CODE (scope) == NAMESPACE_DECL
6328 && current_lang_name != lang_name_cplusplus)
6329 /* Similarly for static data members. */
6331 decl = build_lang_decl (VAR_DECL, name, type);
6333 decl = build_decl (VAR_DECL, name, type);
6335 if (explicit_scope && TREE_CODE (explicit_scope) == NAMESPACE_DECL)
6336 set_decl_namespace (decl, explicit_scope, 0);
6338 DECL_CONTEXT (decl) = FROB_CONTEXT (scope);
6340 if (declspecs->storage_class == sc_extern)
6342 DECL_THIS_EXTERN (decl) = 1;
6343 DECL_EXTERNAL (decl) = !initialized;
6346 if (DECL_CLASS_SCOPE_P (decl))
6348 set_linkage_for_static_data_member (decl);
6349 /* This function is only called with out-of-class definitions. */
6350 DECL_EXTERNAL (decl) = 0;
6351 check_class_member_definition_namespace (decl);
6353 /* At top level, either `static' or no s.c. makes a definition
6354 (perhaps tentative), and absence of `static' makes it public. */
6355 else if (toplevel_bindings_p ())
6357 TREE_PUBLIC (decl) = (declspecs->storage_class != sc_static
6358 && (DECL_THIS_EXTERN (decl) || ! constp));
6359 TREE_STATIC (decl) = ! DECL_EXTERNAL (decl);
6361 /* Not at top level, only `static' makes a static definition. */
6364 TREE_STATIC (decl) = declspecs->storage_class == sc_static;
6365 TREE_PUBLIC (decl) = DECL_EXTERNAL (decl);
6368 if (declspecs->specs[(int)ds_thread])
6369 DECL_TLS_MODEL (decl) = decl_default_tls_model (decl);
6371 if (TREE_PUBLIC (decl))
6373 /* [basic.link]: A name with no linkage (notably, the name of a class
6374 or enumeration declared in a local scope) shall not be used to
6375 declare an entity with linkage.
6377 Only check this for public decls for now. */
6378 tree t = no_linkage_check (TREE_TYPE (decl), /*relaxed_p=*/false);
6381 if (TYPE_ANONYMOUS_P (t))
6383 if (DECL_EXTERN_C_P (decl))
6384 /* Allow this; it's pretty common in C. */
6388 /* DRs 132, 319 and 389 seem to indicate types with
6389 no linkage can only be used to declare extern "C"
6390 entities. Since it's not always an error in the
6391 ISO C++ 90 Standard, we only issue a warning. */
6392 warning (0, "non-local variable %q#D uses anonymous type",
6394 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
6395 warning (0, "%q+#D does not refer to the unqualified "
6396 "type, so it is not used for linkage",
6401 warning (0, "non-local variable %q#D uses local type %qT", decl, t);
6405 DECL_INTERFACE_KNOWN (decl) = 1;
6410 /* Create and return a canonical pointer to member function type, for
6411 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
6414 build_ptrmemfunc_type (tree type)
6418 tree unqualified_variant = NULL_TREE;
6420 if (type == error_mark_node)
6423 /* If a canonical type already exists for this type, use it. We use
6424 this method instead of type_hash_canon, because it only does a
6425 simple equality check on the list of field members. */
6427 if ((t = TYPE_GET_PTRMEMFUNC_TYPE (type)))
6430 /* Make sure that we always have the unqualified pointer-to-member
6432 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
6434 = build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type));
6436 t = make_aggr_type (RECORD_TYPE);
6437 xref_basetypes (t, NULL_TREE);
6439 /* Let the front end know this is a pointer to member function... */
6440 TYPE_PTRMEMFUNC_FLAG (t) = 1;
6441 /* ... and not really an aggregate. */
6442 SET_IS_AGGR_TYPE (t, 0);
6444 field = build_decl (FIELD_DECL, pfn_identifier, type);
6447 field = build_decl (FIELD_DECL, delta_identifier, delta_type_node);
6448 TREE_CHAIN (field) = fields;
6451 finish_builtin_struct (t, "__ptrmemfunc_type", fields, ptr_type_node);
6453 /* Zap out the name so that the back end will give us the debugging
6454 information for this anonymous RECORD_TYPE. */
6455 TYPE_NAME (t) = NULL_TREE;
6457 /* If this is not the unqualified form of this pointer-to-member
6458 type, set the TYPE_MAIN_VARIANT for this type to be the
6459 unqualified type. Since they are actually RECORD_TYPEs that are
6460 not variants of each other, we must do this manually. */
6461 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
6463 t = build_qualified_type (t, cp_type_quals (type));
6464 TYPE_MAIN_VARIANT (t) = unqualified_variant;
6465 TYPE_NEXT_VARIANT (t) = TYPE_NEXT_VARIANT (unqualified_variant);
6466 TYPE_NEXT_VARIANT (unqualified_variant) = t;
6469 /* Cache this pointer-to-member type so that we can find it again
6471 TYPE_SET_PTRMEMFUNC_TYPE (type, t);
6473 if (TYPE_STRUCTURAL_EQUALITY_P (type))
6474 SET_TYPE_STRUCTURAL_EQUALITY (t);
6475 else if (TYPE_CANONICAL (type) != type)
6476 TYPE_CANONICAL (t) = build_ptrmemfunc_type (TYPE_CANONICAL (type));
6481 /* Create and return a pointer to data member type. */
6484 build_ptrmem_type (tree class_type, tree member_type)
6486 if (TREE_CODE (member_type) == METHOD_TYPE)
6490 arg_types = TYPE_ARG_TYPES (member_type);
6491 class_type = (cp_build_qualified_type
6493 cp_type_quals (TREE_TYPE (TREE_VALUE (arg_types)))));
6495 = build_method_type_directly (class_type,
6496 TREE_TYPE (member_type),
6497 TREE_CHAIN (arg_types));
6498 return build_ptrmemfunc_type (build_pointer_type (member_type));
6502 gcc_assert (TREE_CODE (member_type) != FUNCTION_TYPE);
6503 return build_offset_type (class_type, member_type);
6507 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
6508 Check to see that the definition is valid. Issue appropriate error
6509 messages. Return 1 if the definition is particularly bad, or 0
6513 check_static_variable_definition (tree decl, tree type)
6515 /* Motion 10 at San Diego: If a static const integral data member is
6516 initialized with an integral constant expression, the initializer
6517 may appear either in the declaration (within the class), or in
6518 the definition, but not both. If it appears in the class, the
6519 member is a member constant. The file-scope definition is always
6521 if (!ARITHMETIC_TYPE_P (type) && TREE_CODE (type) != ENUMERAL_TYPE)
6523 error ("invalid in-class initialization of static data member "
6524 "of non-integral type %qT",
6526 /* If we just return the declaration, crashes will sometimes
6527 occur. We therefore return void_type_node, as if this were a
6528 friend declaration, to cause callers to completely ignore
6529 this declaration. */
6532 else if (!CP_TYPE_CONST_P (type))
6533 error ("ISO C++ forbids in-class initialization of non-const "
6534 "static member %qD",
6536 else if (pedantic && !INTEGRAL_TYPE_P (type))
6537 pedwarn ("ISO C++ forbids initialization of member constant "
6538 "%qD of non-integral type %qT", decl, type);
6543 /* Given the SIZE (i.e., number of elements) in an array, compute an
6544 appropriate index type for the array. If non-NULL, NAME is the
6545 name of the thing being declared. */
6548 compute_array_index_type (tree name, tree size)
6552 tree abi_1_itype = NULL_TREE;
6554 if (error_operand_p (size))
6555 return error_mark_node;
6557 type = TREE_TYPE (size);
6558 /* The array bound must be an integer type. */
6559 if (!dependent_type_p (type) && !INTEGRAL_TYPE_P (type))
6562 error ("size of array %qD has non-integral type %qT", name, type);
6564 error ("size of array has non-integral type %qT", type);
6565 size = integer_one_node;
6566 type = TREE_TYPE (size);
6569 if (value_dependent_expression_p (size))
6571 /* We cannot do any checking for a value-dependent SIZE. Just
6572 build the index type and mark that it requires structural
6574 itype = build_index_type (build_min (MINUS_EXPR, sizetype,
6575 size, integer_one_node));
6576 SET_TYPE_STRUCTURAL_EQUALITY (itype);
6580 if (!abi_version_at_least (2) && processing_template_decl)
6581 /* For abi-1, we handled all instances in templates the same way,
6582 even when they were non-dependent. This effects the manglings
6583 produced. So, we do the normal checking for non-dependent
6584 sizes, but at the end we'll return the same type that abi-1
6585 would have, but with TYPE_CANONICAL set to the "right"
6586 value that the current ABI would provide. */
6587 abi_1_itype = build_index_type (build_min (MINUS_EXPR, sizetype,
6588 size, integer_one_node));
6590 /* The size might be the result of a cast. */
6591 STRIP_TYPE_NOPS (size);
6593 /* It might be a const variable or enumeration constant. */
6594 size = integral_constant_value (size);
6596 /* Normally, the array-bound will be a constant. */
6597 if (TREE_CODE (size) == INTEGER_CST)
6599 /* Check to see if the array bound overflowed. Make that an
6600 error, no matter how generous we're being. */
6601 int old_flag_pedantic_errors = flag_pedantic_errors;
6602 int old_pedantic = pedantic;
6603 pedantic = flag_pedantic_errors = 1;
6604 constant_expression_warning (size);
6605 pedantic = old_pedantic;
6606 flag_pedantic_errors = old_flag_pedantic_errors;
6608 /* An array must have a positive number of elements. */
6609 if (INT_CST_LT (size, integer_zero_node))
6612 error ("size of array %qD is negative", name);
6614 error ("size of array is negative");
6615 size = integer_one_node;
6617 /* As an extension we allow zero-sized arrays. We always allow
6618 them in system headers because glibc uses them. */
6619 else if (integer_zerop (size) && pedantic && !in_system_header)
6622 pedwarn ("ISO C++ forbids zero-size array %qD", name);
6624 pedwarn ("ISO C++ forbids zero-size array");
6627 else if (TREE_CONSTANT (size))
6629 /* `(int) &fn' is not a valid array bound. */
6631 error ("size of array %qD is not an integral constant-expression",
6634 error ("size of array is not an integral constant-expression");
6635 size = integer_one_node;
6637 else if (pedantic && warn_vla != 0)
6640 pedwarn ("ISO C++ forbids variable length array %qD", name);
6642 pedwarn ("ISO C++ forbids variable length array");
6644 else if (warn_vla > 0)
6648 "variable length array %qD is used", name);
6651 "variable length array is used");
6654 if (processing_template_decl && !TREE_CONSTANT (size))
6655 /* A variable sized array. */
6656 itype = build_min (MINUS_EXPR, sizetype, size, integer_one_node);
6659 HOST_WIDE_INT saved_processing_template_decl;
6661 /* Compute the index of the largest element in the array. It is
6662 one less than the number of elements in the array. We save
6663 and restore PROCESSING_TEMPLATE_DECL so that computations in
6664 cp_build_binary_op will be appropriately folded. */
6665 saved_processing_template_decl = processing_template_decl;
6666 processing_template_decl = 0;
6667 itype = cp_build_binary_op (MINUS_EXPR,
6668 cp_convert (ssizetype, size),
6669 cp_convert (ssizetype, integer_one_node));
6670 itype = fold (itype);
6671 processing_template_decl = saved_processing_template_decl;
6673 if (!TREE_CONSTANT (itype))
6674 /* A variable sized array. */
6675 itype = variable_size (itype);
6676 /* Make sure that there was no overflow when creating to a signed
6677 index type. (For example, on a 32-bit machine, an array with
6678 size 2^32 - 1 is too big.) */
6679 else if (TREE_CODE (itype) == INTEGER_CST
6680 && TREE_OVERFLOW (itype))
6682 error ("overflow in array dimension");
6683 TREE_OVERFLOW (itype) = 0;
6687 /* Create and return the appropriate index type. */
6690 tree t = build_index_type (itype);
6691 TYPE_CANONICAL (abi_1_itype) = TYPE_CANONICAL (t);
6695 return build_index_type (itype);
6698 /* Returns the scope (if any) in which the entity declared by
6699 DECLARATOR will be located. If the entity was declared with an
6700 unqualified name, NULL_TREE is returned. */
6703 get_scope_of_declarator (const cp_declarator *declarator)
6705 while (declarator && declarator->kind != cdk_id)
6706 declarator = declarator->declarator;
6708 /* If the declarator-id is a SCOPE_REF, the scope in which the
6709 declaration occurs is the first operand. */
6711 && declarator->u.id.qualifying_scope)
6712 return declarator->u.id.qualifying_scope;
6714 /* Otherwise, the declarator is not a qualified name; the entity will
6715 be declared in the current scope. */
6719 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
6720 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
6724 create_array_type_for_decl (tree name, tree type, tree size)
6726 tree itype = NULL_TREE;
6727 const char* error_msg;
6729 /* If things have already gone awry, bail now. */
6730 if (type == error_mark_node || size == error_mark_node)
6731 return error_mark_node;
6733 /* Assume that everything will go OK. */
6736 /* There are some types which cannot be array elements. */
6737 switch (TREE_CODE (type))
6740 error_msg = "array of void";
6744 error_msg = "array of functions";
6747 case REFERENCE_TYPE:
6748 error_msg = "array of references";
6752 error_msg = "array of function members";
6759 /* If something went wrong, issue an error-message and return. */
6763 error ("declaration of %qD as %s", name, error_msg);
6765 error ("creating %s", error_msg);
6767 return error_mark_node;
6772 The constant expressions that specify the bounds of the arrays
6773 can be omitted only for the first member of the sequence. */
6774 if (TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type))
6777 error ("declaration of %qD as multidimensional array must "
6778 "have bounds for all dimensions except the first",
6781 error ("multidimensional array must have bounds for all "
6782 "dimensions except the first");
6784 return error_mark_node;
6787 /* Figure out the index type for the array. */
6789 itype = compute_array_index_type (name, size);
6792 T is called the array element type; this type shall not be [...] an
6793 abstract class type. */
6794 abstract_virtuals_error (name, type);
6796 return build_cplus_array_type (type, itype);
6799 /* Check that it's OK to declare a function with the indicated TYPE.
6800 SFK indicates the kind of special function (if any) that this
6801 function is. OPTYPE is the type given in a conversion operator
6802 declaration, or the class type for a constructor/destructor.
6803 Returns the actual return type of the function; that
6804 may be different than TYPE if an error occurs, or for certain
6805 special functions. */
6808 check_special_function_return_type (special_function_kind sfk,
6814 case sfk_constructor:
6816 error ("return type specification for constructor invalid");
6818 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
6819 type = build_pointer_type (optype);
6821 type = void_type_node;
6824 case sfk_destructor:
6826 error ("return type specification for destructor invalid");
6827 /* We can't use the proper return type here because we run into
6828 problems with ambiguous bases and covariant returns.
6829 Java classes are left unchanged because (void *) isn't a valid
6830 Java type, and we don't want to change the Java ABI. */
6831 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
6832 type = build_pointer_type (void_type_node);
6834 type = void_type_node;
6837 case sfk_conversion:
6838 if (type && !same_type_p (type, optype))
6839 error ("operator %qT declared to return %qT", optype, type);
6841 pedwarn ("return type specified for %<operator %T%>", optype);
6852 /* A variable or data member (whose unqualified name is IDENTIFIER)
6853 has been declared with the indicated TYPE. If the TYPE is not
6854 acceptable, issue an error message and return a type to use for
6855 error-recovery purposes. */
6858 check_var_type (tree identifier, tree type)
6860 if (VOID_TYPE_P (type))
6863 error ("unnamed variable or field declared void");
6864 else if (TREE_CODE (identifier) == IDENTIFIER_NODE)
6866 gcc_assert (!IDENTIFIER_OPNAME_P (identifier));
6867 error ("variable or field %qE declared void", identifier);
6870 error ("variable or field declared void");
6871 type = error_mark_node;
6877 /* Given declspecs and a declarator (abstract or otherwise), determine
6878 the name and type of the object declared and construct a DECL node
6881 DECLSPECS points to the representation of declaration-specifier
6882 sequence that precedes declarator.
6884 DECL_CONTEXT says which syntactic context this declaration is in:
6885 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
6886 FUNCDEF for a function definition. Like NORMAL but a few different
6887 error messages in each case. Return value may be zero meaning
6888 this definition is too screwy to try to parse.
6889 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
6890 handle member functions (which have FIELD context).
6891 Return value may be zero meaning this definition is too screwy to
6893 PARM for a parameter declaration (either within a function prototype
6894 or before a function body). Make a PARM_DECL, or return void_type_node.
6895 CATCHPARM for a parameter declaration before a catch clause.
6896 TYPENAME if for a typename (in a cast or sizeof).
6897 Don't make a DECL node; just return the ..._TYPE node.
6898 FIELD for a struct or union field; make a FIELD_DECL.
6899 BITFIELD for a field with specified width.
6900 INITIALIZED is 1 if the decl has an initializer.
6902 ATTRLIST is a pointer to the list of attributes, which may be NULL
6903 if there are none; *ATTRLIST may be modified if attributes from inside
6904 the declarator should be applied to the declaration.
6906 When this function is called, scoping variables (such as
6907 CURRENT_CLASS_TYPE) should reflect the scope in which the
6908 declaration occurs, not the scope in which the new declaration will
6909 be placed. For example, on:
6913 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
6916 Returns a DECL (if a declarator is present), a TYPE (if there is no
6917 declarator, in cases like "struct S;"), or the ERROR_MARK_NODE if an
6921 grokdeclarator (const cp_declarator *declarator,
6922 const cp_decl_specifier_seq *declspecs,
6923 enum decl_context decl_context,
6927 tree type = NULL_TREE;
6929 int virtualp, explicitp, friendp, inlinep, staticp;
6930 int explicit_int = 0;
6931 int explicit_char = 0;
6932 int defaulted_int = 0;
6933 tree dependent_name = NULL_TREE;
6935 tree typedef_decl = NULL_TREE;
6936 const char *name = NULL;
6937 tree typedef_type = NULL_TREE;
6938 /* True if this declarator is a function definition. */
6939 bool funcdef_flag = false;
6940 cp_declarator_kind innermost_code = cdk_error;
6943 /* See the code below that used this. */
6944 tree decl_attr = NULL_TREE;
6947 /* Keep track of what sort of function is being processed
6948 so that we can warn about default return values, or explicit
6949 return values which do not match prescribed defaults. */
6950 special_function_kind sfk = sfk_none;
6952 tree dname = NULL_TREE;
6953 tree ctor_return_type = NULL_TREE;
6954 enum overload_flags flags = NO_SPECIAL;
6955 /* cv-qualifiers that apply to the declarator, for a declaration of
6956 a member function. */
6957 cp_cv_quals memfn_quals = TYPE_UNQUALIFIED;
6958 /* cv-qualifiers that apply to the type specified by the DECLSPECS. */
6960 tree raises = NULL_TREE;
6961 int template_count = 0;
6962 tree returned_attrs = NULL_TREE;
6963 tree parms = NULL_TREE;
6964 const cp_declarator *id_declarator;
6965 /* The unqualified name of the declarator; either an
6966 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
6967 tree unqualified_id;
6968 /* The class type, if any, in which this entity is located,
6969 or NULL_TREE if none. Note that this value may be different from
6970 the current class type; for example if an attempt is made to declare
6971 "A::f" inside "B", this value will be "A". */
6972 tree ctype = current_class_type;
6973 /* The NAMESPACE_DECL for the namespace in which this entity is
6974 located. If an unqualified name is used to declare the entity,
6975 this value will be NULL_TREE, even if the entity is located at
6977 tree in_namespace = NULL_TREE;
6978 cp_storage_class storage_class;
6979 bool unsigned_p, signed_p, short_p, long_p, thread_p;
6980 bool type_was_error_mark_node = false;
6981 bool parameter_pack_p = declarator? declarator->parameter_pack_p : false;
6982 bool set_no_warning = false;
6984 signed_p = declspecs->specs[(int)ds_signed];
6985 unsigned_p = declspecs->specs[(int)ds_unsigned];
6986 short_p = declspecs->specs[(int)ds_short];
6987 long_p = declspecs->specs[(int)ds_long];
6988 longlong = declspecs->specs[(int)ds_long] >= 2;
6989 thread_p = declspecs->specs[(int)ds_thread];
6991 if (decl_context == FUNCDEF)
6992 funcdef_flag = true, decl_context = NORMAL;
6993 else if (decl_context == MEMFUNCDEF)
6994 funcdef_flag = true, decl_context = FIELD;
6995 else if (decl_context == BITFIELD)
6996 bitfield = 1, decl_context = FIELD;
6998 /* Look inside a declarator for the name being declared
6999 and get it as a string, for an error message. */
7000 for (id_declarator = declarator;
7002 id_declarator = id_declarator->declarator)
7004 if (id_declarator->kind != cdk_id)
7005 innermost_code = id_declarator->kind;
7007 switch (id_declarator->kind)
7010 if (id_declarator->declarator
7011 && id_declarator->declarator->kind == cdk_id)
7013 sfk = id_declarator->declarator->u.id.sfk;
7014 if (sfk == sfk_destructor)
7021 tree qualifying_scope = id_declarator->u.id.qualifying_scope;
7022 tree decl = id_declarator->u.id.unqualified_name;
7025 if (qualifying_scope)
7027 if (at_function_scope_p ())
7031 A declarator-id shall not be qualified except
7034 None of the cases are permitted in block
7036 if (qualifying_scope == global_namespace)
7037 error ("invalid use of qualified-name %<::%D%>",
7039 else if (TYPE_P (qualifying_scope))
7040 error ("invalid use of qualified-name %<%T::%D%>",
7041 qualifying_scope, decl);
7043 error ("invalid use of qualified-name %<%D::%D%>",
7044 qualifying_scope, decl);
7045 return error_mark_node;
7047 else if (TYPE_P (qualifying_scope))
7049 ctype = qualifying_scope;
7050 if (innermost_code != cdk_function
7051 && current_class_type
7052 && !UNIQUELY_DERIVED_FROM_P (ctype,
7053 current_class_type))
7055 error ("type %qT is not derived from type %qT",
7056 ctype, current_class_type);
7057 return error_mark_node;
7060 else if (TREE_CODE (qualifying_scope) == NAMESPACE_DECL)
7061 in_namespace = qualifying_scope;
7063 switch (TREE_CODE (decl))
7069 if (innermost_code != cdk_function)
7071 error ("declaration of %qD as non-function", decl);
7072 return error_mark_node;
7074 else if (!qualifying_scope
7075 && !(current_class_type && at_class_scope_p ()))
7077 error ("declaration of %qD as non-member", decl);
7078 return error_mark_node;
7081 type = TREE_OPERAND (decl, 0);
7082 name = IDENTIFIER_POINTER (constructor_name (type));
7087 case TEMPLATE_ID_EXPR:
7089 tree fns = TREE_OPERAND (decl, 0);
7092 if (TREE_CODE (dname) != IDENTIFIER_NODE)
7094 gcc_assert (is_overloaded_fn (dname));
7095 dname = DECL_NAME (get_first_fn (dname));
7100 case IDENTIFIER_NODE:
7101 if (TREE_CODE (decl) == IDENTIFIER_NODE)
7104 if (C_IS_RESERVED_WORD (dname))
7106 error ("declarator-id missing; using reserved word %qD",
7108 name = IDENTIFIER_POINTER (dname);
7110 else if (!IDENTIFIER_TYPENAME_P (dname))
7111 name = IDENTIFIER_POINTER (dname);
7114 gcc_assert (flags == NO_SPECIAL);
7115 flags = TYPENAME_FLAG;
7116 ctor_return_type = TREE_TYPE (dname);
7117 sfk = sfk_conversion;
7118 if (is_typename_at_global_scope (dname))
7119 name = IDENTIFIER_POINTER (dname);
7121 name = "<invalid operator>";
7137 return error_mark_node;
7143 if (id_declarator->kind == cdk_id)
7149 The declarator in a function-definition shall have the form
7150 D1 ( parameter-declaration-clause) ... */
7151 if (funcdef_flag && innermost_code != cdk_function)
7153 error ("function definition does not declare parameters");
7154 return error_mark_node;
7157 if (((dname && IDENTIFIER_OPNAME_P (dname)) || flags == TYPENAME_FLAG)
7158 && innermost_code != cdk_function
7159 && ! (ctype && !declspecs->any_specifiers_p))
7161 error ("declaration of %qD as non-function", dname);
7162 return error_mark_node;
7165 /* Anything declared one level down from the top level
7166 must be one of the parameters of a function
7167 (because the body is at least two levels down). */
7169 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
7170 by not allowing C++ class definitions to specify their parameters
7171 with xdecls (must be spec.d in the parmlist).
7173 Since we now wait to push a class scope until we are sure that
7174 we are in a legitimate method context, we must set oldcname
7175 explicitly (since current_class_name is not yet alive).
7177 We also want to avoid calling this a PARM if it is in a namespace. */
7179 if (decl_context == NORMAL && !toplevel_bindings_p ())
7181 struct cp_binding_level *b = current_binding_level;
7182 current_binding_level = b->level_chain;
7183 if (current_binding_level != 0 && toplevel_bindings_p ())
7184 decl_context = PARM;
7185 current_binding_level = b;
7189 name = decl_context == PARM ? "parameter" : "type name";
7191 /* If there were multiple types specified in the decl-specifier-seq,
7192 issue an error message. */
7193 if (declspecs->multiple_types_p)
7195 error ("two or more data types in declaration of %qs", name);
7196 return error_mark_node;
7199 /* Extract the basic type from the decl-specifier-seq. */
7200 type = declspecs->type;
7201 if (type == error_mark_node)
7204 type_was_error_mark_node = true;
7206 /* If the entire declaration is itself tagged as deprecated then
7207 suppress reports of deprecated items. */
7208 if (type && TREE_DEPRECATED (type)
7209 && deprecated_state != DEPRECATED_SUPPRESS)
7210 warn_deprecated_use (type);
7211 if (type && TREE_CODE (type) == TYPE_DECL)
7213 typedef_decl = type;
7214 type = TREE_TYPE (typedef_decl);
7216 /* No type at all: default to `int', and set DEFAULTED_INT
7217 because it was not a user-defined typedef. */
7218 if (type == NULL_TREE && (signed_p || unsigned_p || long_p || short_p))
7220 /* These imply 'int'. */
7221 type = integer_type_node;
7225 explicit_int = declspecs->explicit_int_p;
7226 explicit_char = declspecs->explicit_char_p;
7229 /* See the code below that used this. */
7231 decl_attr = DECL_ATTRIBUTES (typedef_decl);
7233 typedef_type = type;
7236 if (sfk != sfk_conversion)
7237 ctor_return_type = ctype;
7239 if (sfk != sfk_none)
7240 type = check_special_function_return_type (sfk, type,
7242 else if (type == NULL_TREE)
7248 /* We handle `main' specially here, because 'main () { }' is so
7249 common. With no options, it is allowed. With -Wreturn-type,
7250 it is a warning. It is only an error with -pedantic-errors. */
7251 is_main = (funcdef_flag
7252 && dname && MAIN_NAME_P (dname)
7253 && ctype == NULL_TREE
7254 && in_namespace == NULL_TREE
7255 && current_namespace == global_namespace);
7257 if (type_was_error_mark_node)
7258 /* We've already issued an error, don't complain more. */;
7259 else if (in_system_header || flag_ms_extensions)
7260 /* Allow it, sigh. */;
7261 else if (pedantic || ! is_main)
7262 pedwarn ("ISO C++ forbids declaration of %qs with no type", name);
7264 warning (OPT_Wreturn_type,
7265 "ISO C++ forbids declaration of %qs with no type", name);
7267 type = integer_type_node;
7272 /* Now process the modifiers that were specified
7273 and check for invalid combinations. */
7275 /* Long double is a special combination. */
7276 if (long_p && !longlong && TYPE_MAIN_VARIANT (type) == double_type_node)
7279 type = build_qualified_type (long_double_type_node,
7280 cp_type_quals (type));
7283 /* Check all other uses of type modifiers. */
7285 if (unsigned_p || signed_p || long_p || short_p)
7289 if ((signed_p || unsigned_p) && TREE_CODE (type) != INTEGER_TYPE)
7290 error ("%<signed%> or %<unsigned%> invalid for %qs", name);
7291 else if (signed_p && unsigned_p)
7292 error ("%<signed%> and %<unsigned%> specified together for %qs", name);
7293 else if (longlong && TREE_CODE (type) != INTEGER_TYPE)
7294 error ("%<long long%> invalid for %qs", name);
7295 else if (long_p && TREE_CODE (type) == REAL_TYPE)
7296 error ("%<long%> invalid for %qs", name);
7297 else if (short_p && TREE_CODE (type) == REAL_TYPE)
7298 error ("%<short%> invalid for %qs", name);
7299 else if ((long_p || short_p) && TREE_CODE (type) != INTEGER_TYPE)
7300 error ("%<long%> or %<short%> invalid for %qs", name);
7301 else if ((long_p || short_p) && explicit_char)
7302 error ("%<long%> or %<short%> specified with char for %qs", name);
7303 else if (long_p && short_p)
7304 error ("%<long%> and %<short%> specified together for %qs", name);
7308 if (!explicit_int && !defaulted_int && !explicit_char && pedantic)
7310 pedwarn ("long, short, signed or unsigned used invalidly for %qs",
7312 if (flag_pedantic_errors)
7317 /* Discard the type modifiers if they are invalid. */
7328 /* Decide whether an integer type is signed or not.
7329 Optionally treat bitfields as signed by default. */
7333 It is implementation-defined whether a plain (neither
7334 explicitly signed or unsigned) char, short, int, or long
7335 bit-field is signed or unsigned.
7337 Naturally, we extend this to long long as well. Note that
7338 this does not include wchar_t. */
7339 || (bitfield && !flag_signed_bitfields
7341 /* A typedef for plain `int' without `signed' can be
7342 controlled just like plain `int', but a typedef for
7343 `signed int' cannot be so controlled. */
7345 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl))
7346 && TREE_CODE (type) == INTEGER_TYPE
7347 && !same_type_p (TYPE_MAIN_VARIANT (type), wchar_type_node)))
7350 type = long_long_unsigned_type_node;
7352 type = long_unsigned_type_node;
7354 type = short_unsigned_type_node;
7355 else if (type == char_type_node)
7356 type = unsigned_char_type_node;
7357 else if (typedef_decl)
7358 type = c_common_unsigned_type (type);
7360 type = unsigned_type_node;
7362 else if (signed_p && type == char_type_node)
7363 type = signed_char_type_node;
7365 type = long_long_integer_type_node;
7367 type = long_integer_type_node;
7369 type = short_integer_type_node;
7371 if (declspecs->specs[(int)ds_complex])
7373 if (TREE_CODE (type) != INTEGER_TYPE && TREE_CODE (type) != REAL_TYPE)
7374 error ("complex invalid for %qs", name);
7375 /* If we just have "complex", it is equivalent to
7376 "complex double", but if any modifiers at all are specified it is
7377 the complex form of TYPE. E.g, "complex short" is
7378 "complex short int". */
7380 else if (defaulted_int && ! longlong
7381 && ! (long_p || short_p || signed_p || unsigned_p))
7382 type = complex_double_type_node;
7383 else if (type == integer_type_node)
7384 type = complex_integer_type_node;
7385 else if (type == float_type_node)
7386 type = complex_float_type_node;
7387 else if (type == double_type_node)
7388 type = complex_double_type_node;
7389 else if (type == long_double_type_node)
7390 type = complex_long_double_type_node;
7392 type = build_complex_type (type);
7395 type_quals = TYPE_UNQUALIFIED;
7396 if (declspecs->specs[(int)ds_const])
7397 type_quals |= TYPE_QUAL_CONST;
7398 if (declspecs->specs[(int)ds_volatile])
7399 type_quals |= TYPE_QUAL_VOLATILE;
7400 if (declspecs->specs[(int)ds_restrict])
7401 type_quals |= TYPE_QUAL_RESTRICT;
7402 if (sfk == sfk_conversion && type_quals != TYPE_UNQUALIFIED)
7403 error ("qualifiers are not allowed on declaration of %<operator %T%>",
7406 if (TREE_CODE (type) == FUNCTION_TYPE
7407 && type_quals != TYPE_UNQUALIFIED)
7409 /* This was an error in C++98 (cv-qualifiers cannot be added to
7410 a function type), but DR 295 makes the code well-formed by
7411 dropping the extra qualifiers. */
7414 tree bad_type = build_qualified_type (type, type_quals);
7415 pedwarn ("ignoring %qV qualifiers added to function type %qT",
7418 type_quals = TYPE_UNQUALIFIED;
7420 type_quals |= cp_type_quals (type);
7421 type = cp_build_qualified_type_real
7422 (type, type_quals, ((typedef_decl && !DECL_ARTIFICIAL (typedef_decl)
7423 ? tf_ignore_bad_quals : 0) | tf_warning_or_error));
7424 /* We might have ignored or rejected some of the qualifiers. */
7425 type_quals = cp_type_quals (type);
7428 inlinep = !! declspecs->specs[(int)ds_inline];
7429 virtualp = !! declspecs->specs[(int)ds_virtual];
7430 explicitp = !! declspecs->specs[(int)ds_explicit];
7432 storage_class = declspecs->storage_class;
7433 if (storage_class == sc_static)
7434 staticp = 1 + (decl_context == FIELD);
7436 if (virtualp && staticp == 2)
7438 error ("member %qD cannot be declared both virtual and static", dname);
7439 storage_class = sc_none;
7442 friendp = !! declspecs->specs[(int)ds_friend];
7444 if (dependent_name && !friendp)
7446 error ("%<%T::%D%> is not a valid declarator", ctype, dependent_name);
7447 return error_mark_node;
7450 /* Issue errors about use of storage classes for parameters. */
7451 if (decl_context == PARM)
7453 if (declspecs->specs[(int)ds_typedef])
7455 error ("typedef declaration invalid in parameter declaration");
7456 return error_mark_node;
7458 else if (storage_class == sc_static
7459 || storage_class == sc_extern
7461 error ("storage class specifiers invalid in parameter declarations");
7464 /* Give error if `virtual' is used outside of class declaration. */
7466 && (current_class_name == NULL_TREE || decl_context != FIELD))
7468 error ("virtual outside class declaration");
7472 /* Static anonymous unions are dealt with here. */
7473 if (staticp && decl_context == TYPENAME
7475 && ANON_AGGR_TYPE_P (declspecs->type))
7476 decl_context = FIELD;
7478 /* Warn about storage classes that are invalid for certain
7479 kinds of declarations (parameters, typenames, etc.). */
7482 && storage_class != sc_extern
7483 && storage_class != sc_static)
7484 || declspecs->specs[(int)ds_typedef]))
7486 error ("multiple storage classes in declaration of %qs", name);
7489 if (declspecs->conflicting_specifiers_p)
7491 error ("conflicting specifiers in declaration of %qs", name);
7492 storage_class = sc_none;
7494 else if (decl_context != NORMAL
7495 && ((storage_class != sc_none
7496 && storage_class != sc_mutable)
7499 if ((decl_context == PARM || decl_context == CATCHPARM)
7500 && (storage_class == sc_register
7501 || storage_class == sc_auto))
7503 else if (declspecs->specs[(int)ds_typedef])
7505 else if (decl_context == FIELD
7506 /* C++ allows static class elements. */
7507 && storage_class == sc_static)
7508 /* C++ also allows inlines and signed and unsigned elements,
7509 but in those cases we don't come in here. */
7513 if (decl_context == FIELD)
7514 error ("storage class specified for %qs", name);
7517 if (decl_context == PARM || decl_context == CATCHPARM)
7518 error ("storage class specified for parameter %qs", name);
7520 error ("storage class specified for typename");
7522 if (storage_class == sc_register
7523 || storage_class == sc_auto
7524 || storage_class == sc_extern
7526 storage_class = sc_none;
7529 else if (storage_class == sc_extern && initialized
7532 if (toplevel_bindings_p ())
7534 /* It's common practice (and completely valid) to have a const
7535 be initialized and declared extern. */
7536 if (!(type_quals & TYPE_QUAL_CONST))
7537 warning (0, "%qs initialized and declared %<extern%>", name);
7540 error ("%qs has both %<extern%> and initializer", name);
7542 else if (storage_class == sc_extern && funcdef_flag
7543 && ! toplevel_bindings_p ())
7544 error ("nested function %qs declared %<extern%>", name);
7545 else if (toplevel_bindings_p ())
7547 if (storage_class == sc_auto)
7548 error ("top-level declaration of %qs specifies %<auto%>", name);
7551 && storage_class != sc_extern
7552 && storage_class != sc_static)
7554 error ("function-scope %qs implicitly auto and declared %<__thread%>",
7559 if (storage_class && friendp)
7560 error ("storage class specifiers invalid in friend function declarations");
7563 unqualified_id = NULL_TREE;
7566 unqualified_id = id_declarator->u.id.unqualified_name;
7567 switch (TREE_CODE (unqualified_id))
7571 = constructor_name (TREE_OPERAND (unqualified_id, 0));
7574 case IDENTIFIER_NODE:
7575 case TEMPLATE_ID_EXPR:
7583 /* Determine the type of the entity declared by recurring on the
7585 for (; declarator; declarator = declarator->declarator)
7587 const cp_declarator *inner_declarator;
7590 if (type == error_mark_node)
7591 return error_mark_node;
7593 attrs = declarator->attributes;
7599 if (declarator == NULL || declarator->kind == cdk_id)
7600 attr_flags |= (int) ATTR_FLAG_DECL_NEXT;
7601 if (declarator->kind == cdk_function)
7602 attr_flags |= (int) ATTR_FLAG_FUNCTION_NEXT;
7603 if (declarator->kind == cdk_array)
7604 attr_flags |= (int) ATTR_FLAG_ARRAY_NEXT;
7605 returned_attrs = decl_attributes (&type,
7606 chainon (returned_attrs, attrs),
7610 if (declarator->kind == cdk_id)
7613 inner_declarator = declarator->declarator;
7615 switch (declarator->kind)
7618 type = create_array_type_for_decl (dname, type,
7619 declarator->u.array.bounds);
7627 /* Declaring a function type.
7628 Make sure we have a valid type for the function to return. */
7630 if (type_quals != TYPE_UNQUALIFIED)
7632 if (SCALAR_TYPE_P (type) || VOID_TYPE_P (type))
7633 warning (OPT_Wreturn_type,
7634 "type qualifiers ignored on function return type");
7635 /* We now know that the TYPE_QUALS don't apply to the
7636 decl, but to its return type. */
7637 type_quals = TYPE_UNQUALIFIED;
7638 set_no_warning = true;
7641 /* Warn about some types functions can't return. */
7643 if (TREE_CODE (type) == FUNCTION_TYPE)
7645 error ("%qs declared as function returning a function", name);
7646 type = integer_type_node;
7648 if (TREE_CODE (type) == ARRAY_TYPE)
7650 error ("%qs declared as function returning an array", name);
7651 type = integer_type_node;
7654 /* Pick up type qualifiers which should be applied to `this'. */
7655 memfn_quals = declarator->u.function.qualifiers;
7657 /* Pick up the exception specifications. */
7658 raises = declarator->u.function.exception_specification;
7660 /* Say it's a definition only for the CALL_EXPR
7661 closest to the identifier. */
7662 funcdecl_p = inner_declarator && inner_declarator->kind == cdk_id;
7664 if (ctype == NULL_TREE
7665 && decl_context == FIELD
7667 && (friendp == 0 || dname == current_class_name))
7668 ctype = current_class_type;
7670 if (ctype && (sfk == sfk_constructor
7671 || sfk == sfk_destructor))
7673 /* We are within a class's scope. If our declarator name
7674 is the same as the class name, and we are defining
7675 a function, then it is a constructor/destructor, and
7676 therefore returns a void type. */
7678 /* ISO C++ 12.4/2. A destructor may not be declared
7679 const or volatile. A destructor may not be
7682 ISO C++ 12.1. A constructor may not be declared
7683 const or volatile. A constructor may not be
7684 virtual. A constructor may not be static. */
7686 error ((flags == DTOR_FLAG)
7687 ? "destructor cannot be static member function"
7688 : "constructor cannot be static member function");
7691 error ((flags == DTOR_FLAG)
7692 ? "destructors may not be cv-qualified"
7693 : "constructors may not be cv-qualified");
7694 memfn_quals = TYPE_UNQUALIFIED;
7697 if (decl_context == FIELD
7698 && !member_function_or_else (ctype,
7701 return error_mark_node;
7703 if (flags != DTOR_FLAG)
7705 /* It's a constructor. */
7710 pedwarn ("constructors cannot be declared virtual");
7713 if (decl_context == FIELD
7714 && sfk != sfk_constructor)
7715 return error_mark_node;
7717 if (decl_context == FIELD)
7723 error ("can't initialize friend function %qs", name);
7726 /* Cannot be both friend and virtual. */
7727 error ("virtual functions cannot be friends");
7730 if (decl_context == NORMAL)
7731 error ("friend declaration not in class definition");
7732 if (current_function_decl && funcdef_flag)
7733 error ("can't define friend function %qs in a local "
7738 arg_types = grokparms (declarator->u.function.parameters,
7741 if (inner_declarator
7742 && inner_declarator->kind == cdk_id
7743 && inner_declarator->u.id.sfk == sfk_destructor
7744 && arg_types != void_list_node)
7746 error ("destructors may not have parameters");
7747 arg_types = void_list_node;
7751 type = build_function_type (type, arg_types);
7758 /* Filter out pointers-to-references and references-to-references.
7759 We can get these if a TYPE_DECL is used. */
7761 if (TREE_CODE (type) == REFERENCE_TYPE)
7763 error (declarator->kind == cdk_reference
7764 ? "cannot declare reference to %q#T"
7765 : "cannot declare pointer to %q#T", type);
7766 type = TREE_TYPE (type);
7768 else if (VOID_TYPE_P (type))
7770 if (declarator->kind == cdk_reference)
7771 error ("cannot declare reference to %q#T", type);
7772 else if (declarator->kind == cdk_ptrmem)
7773 error ("cannot declare pointer to %q#T member", type);
7776 /* We now know that the TYPE_QUALS don't apply to the decl,
7777 but to the target of the pointer. */
7778 type_quals = TYPE_UNQUALIFIED;
7780 if (declarator->kind == cdk_ptrmem
7781 && (TREE_CODE (type) == FUNCTION_TYPE || memfn_quals))
7783 memfn_quals |= cp_type_quals (type);
7784 type = build_memfn_type (type,
7785 declarator->u.pointer.class_type,
7787 memfn_quals = TYPE_UNQUALIFIED;
7790 if (declarator->kind == cdk_reference)
7792 if (!VOID_TYPE_P (type))
7793 type = build_reference_type (type);
7795 else if (TREE_CODE (type) == METHOD_TYPE)
7796 type = build_ptrmemfunc_type (build_pointer_type (type));
7797 else if (declarator->kind == cdk_ptrmem)
7799 gcc_assert (TREE_CODE (declarator->u.pointer.class_type)
7801 if (declarator->u.pointer.class_type == error_mark_node)
7802 /* We will already have complained. */
7803 type = error_mark_node;
7805 type = build_ptrmem_type (declarator->u.pointer.class_type,
7809 type = build_pointer_type (type);
7811 /* Process a list of type modifier keywords (such as
7812 const or volatile) that were given inside the `*' or `&'. */
7814 if (declarator->u.pointer.qualifiers)
7817 = cp_build_qualified_type (type,
7818 declarator->u.pointer.qualifiers);
7819 type_quals = cp_type_quals (type);
7832 if (unqualified_id && TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR
7833 && TREE_CODE (type) != FUNCTION_TYPE
7834 && TREE_CODE (type) != METHOD_TYPE)
7836 error ("template-id %qD used as a declarator",
7838 unqualified_id = dname;
7841 /* If TYPE is a FUNCTION_TYPE, but the function name was explicitly
7842 qualified with a class-name, turn it into a METHOD_TYPE, unless
7843 we know that the function is static. We take advantage of this
7844 opportunity to do other processing that pertains to entities
7845 explicitly declared to be class members. Note that if DECLARATOR
7846 is non-NULL, we know it is a cdk_id declarator; otherwise, we
7847 would not have exited the loop above. */
7849 && declarator->u.id.qualifying_scope
7850 && TYPE_P (declarator->u.id.qualifying_scope))
7854 ctype = declarator->u.id.qualifying_scope;
7855 ctype = TYPE_MAIN_VARIANT (ctype);
7857 while (t != NULL_TREE && CLASS_TYPE_P (t))
7859 /* You're supposed to have one `template <...>' for every
7860 template class, but you don't need one for a full
7861 specialization. For example:
7863 template <class T> struct S{};
7864 template <> struct S<int> { void f(); };
7865 void S<int>::f () {}
7867 is correct; there shouldn't be a `template <>' for the
7868 definition of `S<int>::f'. */
7869 if (CLASSTYPE_TEMPLATE_SPECIALIZATION (t)
7870 && !any_dependent_template_arguments_p (CLASSTYPE_TI_ARGS (t)))
7871 /* T is an explicit (not partial) specialization. All
7872 containing classes must therefore also be explicitly
7875 if ((CLASSTYPE_USE_TEMPLATE (t) || CLASSTYPE_IS_TEMPLATE (t))
7876 && PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (t)))
7877 template_count += 1;
7879 t = TYPE_MAIN_DECL (t);
7880 t = DECL_CONTEXT (t);
7883 if (ctype == current_class_type)
7886 pedwarn ("member functions are implicitly friends of their class");
7888 pedwarn ("extra qualification %<%T::%> on member %qs",
7891 else if (/* If the qualifying type is already complete, then we
7892 can skip the following checks. */
7893 !COMPLETE_TYPE_P (ctype)
7894 && (/* If the function is being defined, then
7895 qualifying type must certainly be complete. */
7897 /* A friend declaration of "T::f" is OK, even if
7898 "T" is a template parameter. But, if this
7899 function is not a friend, the qualifying type
7901 || (!friendp && !CLASS_TYPE_P (ctype))
7902 /* For a declaration, the type need not be
7903 complete, if either it is dependent (since there
7904 is no meaningful definition of complete in that
7905 case) or the qualifying class is currently being
7907 || !(dependent_type_p (ctype)
7908 || currently_open_class (ctype)))
7909 /* Check that the qualifying type is complete. */
7910 && !complete_type_or_else (ctype, NULL_TREE))
7911 return error_mark_node;
7912 else if (TREE_CODE (type) == FUNCTION_TYPE)
7914 tree sname = declarator->u.id.unqualified_name;
7916 if (current_class_type
7917 && (!friendp || funcdef_flag))
7920 ? "cannot define member function %<%T::%s%> within %<%T%>"
7921 : "cannot declare member function %<%T::%s%> within %<%T%>",
7922 ctype, name, current_class_type);
7923 return error_mark_node;
7926 if (TREE_CODE (sname) == IDENTIFIER_NODE
7927 && NEW_DELETE_OPNAME_P (sname))
7928 /* Overloaded operator new and operator delete
7929 are always static functions. */
7932 type = build_memfn_type (type, ctype, memfn_quals);
7934 else if (declspecs->specs[(int)ds_typedef]
7935 && current_class_type)
7937 error ("cannot declare member %<%T::%s%> within %qT",
7938 ctype, name, current_class_type);
7939 return error_mark_node;
7943 /* Now TYPE has the actual type. */
7948 *attrlist = chainon (returned_attrs, *attrlist);
7950 attrlist = &returned_attrs;
7953 /* Handle parameter packs. */
7954 if (parameter_pack_p)
7956 if (decl_context == PARM)
7957 /* Turn the type into a pack expansion.*/
7958 type = make_pack_expansion (type);
7960 error ("non-parameter %qs cannot be a parameter pack", name);
7963 /* Did array size calculations overflow? */
7965 if (TREE_CODE (type) == ARRAY_TYPE
7966 && COMPLETE_TYPE_P (type)
7967 && TREE_CODE (TYPE_SIZE_UNIT (type)) == INTEGER_CST
7968 && TREE_OVERFLOW (TYPE_SIZE_UNIT (type)))
7970 error ("size of array %qs is too large", name);
7971 /* If we proceed with the array type as it is, we'll eventually
7972 crash in tree_low_cst(). */
7973 type = error_mark_node;
7976 if ((decl_context == FIELD || decl_context == PARM)
7977 && !processing_template_decl
7978 && variably_modified_type_p (type, NULL_TREE))
7980 if (decl_context == FIELD)
7981 error ("data member may not have variably modified type %qT", type);
7983 error ("parameter may not have variably modified type %qT", type);
7984 type = error_mark_node;
7987 if (explicitp == 1 || (explicitp && friendp))
7989 /* [dcl.fct.spec] The explicit specifier shall only be used in
7990 declarations of constructors within a class definition. */
7991 error ("only declarations of constructors can be %<explicit%>");
7995 if (storage_class == sc_mutable)
7997 if (decl_context != FIELD || friendp)
7999 error ("non-member %qs cannot be declared %<mutable%>", name);
8000 storage_class = sc_none;
8002 else if (decl_context == TYPENAME || declspecs->specs[(int)ds_typedef])
8004 error ("non-object member %qs cannot be declared %<mutable%>", name);
8005 storage_class = sc_none;
8007 else if (TREE_CODE (type) == FUNCTION_TYPE
8008 || TREE_CODE (type) == METHOD_TYPE)
8010 error ("function %qs cannot be declared %<mutable%>", name);
8011 storage_class = sc_none;
8015 error ("static %qs cannot be declared %<mutable%>", name);
8016 storage_class = sc_none;
8018 else if (type_quals & TYPE_QUAL_CONST)
8020 error ("const %qs cannot be declared %<mutable%>", name);
8021 storage_class = sc_none;
8025 /* If this is declaring a typedef name, return a TYPE_DECL. */
8026 if (declspecs->specs[(int)ds_typedef] && decl_context != TYPENAME)
8030 /* Note that the grammar rejects storage classes
8031 in typenames, fields or parameters. */
8032 if (current_lang_name == lang_name_java)
8033 TYPE_FOR_JAVA (type) = 1;
8035 /* This declaration:
8037 typedef void f(int) const;
8039 declares a function type which is not a member of any
8040 particular class, but which is cv-qualified; for
8041 example "f S::*" declares a pointer to a const-qualified
8042 member function of S. We record the cv-qualification in the
8044 if (memfn_quals && TREE_CODE (type) == FUNCTION_TYPE)
8046 type = cp_build_qualified_type (type, memfn_quals);
8048 /* We have now dealt with these qualifiers. */
8049 memfn_quals = TYPE_UNQUALIFIED;
8052 if (decl_context == FIELD)
8053 decl = build_lang_decl (TYPE_DECL, unqualified_id, type);
8055 decl = build_decl (TYPE_DECL, unqualified_id, type);
8056 if (id_declarator && declarator->u.id.qualifying_scope)
8057 error ("%Jtypedef name may not be a nested-name-specifier", decl);
8059 if (decl_context != FIELD)
8061 if (!current_function_decl)
8062 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
8063 else if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (current_function_decl)
8064 || (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P
8065 (current_function_decl)))
8066 /* The TYPE_DECL is "abstract" because there will be
8067 clones of this constructor/destructor, and there will
8068 be copies of this TYPE_DECL generated in those
8070 DECL_ABSTRACT (decl) = 1;
8072 else if (constructor_name_p (unqualified_id, current_class_type))
8073 pedwarn ("ISO C++ forbids nested type %qD with same name "
8074 "as enclosing class",
8077 /* If the user declares "typedef struct {...} foo" then the
8078 struct will have an anonymous name. Fill that name in now.
8079 Nothing can refer to it, so nothing needs know about the name
8081 if (type != error_mark_node
8084 && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
8085 && TYPE_ANONYMOUS_P (type)
8086 /* Don't do this if there are attributes. */
8087 && (!attrlist || !*attrlist)
8088 && cp_type_quals (type) == TYPE_UNQUALIFIED)
8090 tree oldname = TYPE_NAME (type);
8093 /* Replace the anonymous name with the real name everywhere. */
8094 for (t = TYPE_MAIN_VARIANT (type); t; t = TYPE_NEXT_VARIANT (t))
8095 if (TYPE_NAME (t) == oldname)
8096 TYPE_NAME (t) = decl;
8098 if (TYPE_LANG_SPECIFIC (type))
8099 TYPE_WAS_ANONYMOUS (type) = 1;
8101 /* If this is a typedef within a template class, the nested
8102 type is a (non-primary) template. The name for the
8103 template needs updating as well. */
8104 if (TYPE_LANG_SPECIFIC (type) && CLASSTYPE_TEMPLATE_INFO (type))
8105 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type))
8106 = TYPE_IDENTIFIER (type);
8108 /* FIXME remangle member functions; member functions of a
8109 type with external linkage have external linkage. */
8113 || (typedef_decl && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl)))
8114 C_TYPEDEF_EXPLICITLY_SIGNED (decl) = 1;
8116 bad_specifiers (decl, "type", virtualp,
8117 memfn_quals != TYPE_UNQUALIFIED,
8118 inlinep, friendp, raises != NULL_TREE);
8123 /* Detect the case of an array type of unspecified size
8124 which came, as such, direct from a typedef name.
8125 We must copy the type, so that the array's domain can be
8126 individually set by the object's initializer. */
8128 if (type && typedef_type
8129 && TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type)
8130 && TYPE_MAIN_VARIANT (type) == TYPE_MAIN_VARIANT (typedef_type))
8131 type = build_cplus_array_type (TREE_TYPE (type), NULL_TREE);
8133 /* Detect where we're using a typedef of function type to declare a
8134 function. PARMS will not be set, so we must create it now. */
8136 if (type == typedef_type && TREE_CODE (type) == FUNCTION_TYPE)
8138 tree decls = NULL_TREE;
8141 for (args = TYPE_ARG_TYPES (type); args; args = TREE_CHAIN (args))
8143 tree decl = cp_build_parm_decl (NULL_TREE, TREE_VALUE (args));
8145 TREE_CHAIN (decl) = decls;
8149 parms = nreverse (decls);
8151 if (decl_context != TYPENAME)
8153 /* A cv-qualifier-seq shall only be part of the function type
8154 for a non-static member function. [8.3.5/4 dcl.fct] */
8155 if (cp_type_quals (type) != TYPE_UNQUALIFIED
8156 && (current_class_type == NULL_TREE || staticp) )
8159 ? G_("qualified function types cannot be used to "
8160 "declare static member functions")
8161 : G_("qualified function types cannot be used to "
8162 "declare free functions"));
8163 type = TYPE_MAIN_VARIANT (type);
8166 /* The qualifiers on the function type become the qualifiers on
8167 the non-static member function. */
8168 memfn_quals |= cp_type_quals (type);
8172 /* If this is a type name (such as, in a cast or sizeof),
8173 compute the type and return it now. */
8175 if (decl_context == TYPENAME)
8177 /* Note that the grammar rejects storage classes
8178 in typenames, fields or parameters. */
8179 if (type_quals != TYPE_UNQUALIFIED)
8180 type_quals = TYPE_UNQUALIFIED;
8182 /* Special case: "friend class foo" looks like a TYPENAME context. */
8185 if (type_quals != TYPE_UNQUALIFIED)
8187 error ("type qualifiers specified for friend class declaration");
8188 type_quals = TYPE_UNQUALIFIED;
8192 error ("%<inline%> specified for friend class declaration");
8198 /* Don't allow friend declaration without a class-key. */
8199 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
8200 pedwarn ("template parameters cannot be friends");
8201 else if (TREE_CODE (type) == TYPENAME_TYPE)
8202 pedwarn ("friend declaration requires class-key, "
8203 "i.e. %<friend class %T::%D%>",
8204 TYPE_CONTEXT (type), TYPENAME_TYPE_FULLNAME (type));
8206 pedwarn ("friend declaration requires class-key, "
8207 "i.e. %<friend %#T%>",
8211 /* Only try to do this stuff if we didn't already give up. */
8212 if (type != integer_type_node)
8214 /* A friendly class? */
8215 if (current_class_type)
8216 make_friend_class (current_class_type, TYPE_MAIN_VARIANT (type),
8219 error ("trying to make class %qT a friend of global scope",
8222 type = void_type_node;
8225 else if (memfn_quals)
8227 if (ctype == NULL_TREE)
8229 if (TREE_CODE (type) != METHOD_TYPE)
8230 error ("invalid qualifiers on non-member function type");
8232 ctype = TYPE_METHOD_BASETYPE (type);
8235 type = build_memfn_type (type, ctype, memfn_quals);
8240 else if (unqualified_id == NULL_TREE && decl_context != PARM
8241 && decl_context != CATCHPARM
8242 && TREE_CODE (type) != UNION_TYPE
8245 error ("abstract declarator %qT used as declaration", type);
8246 return error_mark_node;
8249 /* Only functions may be declared using an operator-function-id. */
8251 && IDENTIFIER_OPNAME_P (unqualified_id)
8252 && TREE_CODE (type) != FUNCTION_TYPE
8253 && TREE_CODE (type) != METHOD_TYPE)
8255 error ("declaration of %qD as non-function", unqualified_id);
8256 return error_mark_node;
8259 /* We don't check parameter types here because we can emit a better
8260 error message later. */
8261 if (decl_context != PARM)
8263 type = check_var_type (unqualified_id, type);
8264 if (type == error_mark_node)
8265 return error_mark_node;
8268 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
8269 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
8271 if (decl_context == PARM || decl_context == CATCHPARM)
8273 if (ctype || in_namespace)
8274 error ("cannot use %<::%> in parameter declaration");
8276 /* A parameter declared as an array of T is really a pointer to T.
8277 One declared as a function is really a pointer to a function.
8278 One declared as a member is really a pointer to member. */
8280 if (TREE_CODE (type) == ARRAY_TYPE)
8282 /* Transfer const-ness of array into that of type pointed to. */
8283 type = build_pointer_type (TREE_TYPE (type));
8284 type_quals = TYPE_UNQUALIFIED;
8286 else if (TREE_CODE (type) == FUNCTION_TYPE)
8287 type = build_pointer_type (type);
8293 if (decl_context == PARM)
8295 decl = cp_build_parm_decl (unqualified_id, type);
8297 bad_specifiers (decl, "parameter", virtualp,
8298 memfn_quals != TYPE_UNQUALIFIED,
8299 inlinep, friendp, raises != NULL_TREE);
8301 else if (decl_context == FIELD)
8303 /* The C99 flexible array extension. */
8304 if (!staticp && TREE_CODE (type) == ARRAY_TYPE
8305 && TYPE_DOMAIN (type) == NULL_TREE)
8307 tree itype = compute_array_index_type (dname, integer_zero_node);
8308 type = build_cplus_array_type (TREE_TYPE (type), itype);
8311 if (type == error_mark_node)
8313 /* Happens when declaring arrays of sizes which
8314 are error_mark_node, for example. */
8317 else if (in_namespace && !friendp)
8319 /* Something like struct S { int N::j; }; */
8320 error ("invalid use of %<::%>");
8321 return error_mark_node;
8323 else if (TREE_CODE (type) == FUNCTION_TYPE)
8326 tree function_context;
8330 if (ctype == NULL_TREE)
8331 ctype = current_class_type;
8333 if (ctype == NULL_TREE)
8335 error ("can't make %qD into a method -- not in a class",
8337 return error_mark_node;
8340 /* ``A union may [ ... ] not [ have ] virtual functions.''
8342 if (virtualp && TREE_CODE (ctype) == UNION_TYPE)
8344 error ("function %qD declared virtual inside a union",
8346 return error_mark_node;
8349 if (NEW_DELETE_OPNAME_P (unqualified_id))
8353 error ("%qD cannot be declared virtual, since it "
8359 else if (staticp < 2)
8360 type = build_memfn_type (type, ctype, memfn_quals);
8363 /* Check that the name used for a destructor makes sense. */
8364 if (sfk == sfk_destructor)
8368 gcc_assert (friendp);
8369 error ("expected qualified name in friend declaration "
8370 "for destructor %qD",
8371 id_declarator->u.id.unqualified_name);
8372 return error_mark_node;
8375 if (!same_type_p (TREE_OPERAND
8376 (id_declarator->u.id.unqualified_name, 0),
8379 error ("declaration of %qD as member of %qT",
8380 id_declarator->u.id.unqualified_name, ctype);
8381 return error_mark_node;
8385 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
8386 function_context = (ctype != NULL_TREE) ?
8387 decl_function_context (TYPE_MAIN_DECL (ctype)) : NULL_TREE;
8388 publicp = (! friendp || ! staticp)
8389 && function_context == NULL_TREE;
8390 decl = grokfndecl (ctype, type,
8391 TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
8392 ? unqualified_id : dname,
8395 virtualp, flags, memfn_quals, raises,
8396 friendp ? -1 : 0, friendp, publicp, inlinep,
8398 funcdef_flag, template_count, in_namespace, attrlist);
8399 if (decl == NULL_TREE)
8400 return error_mark_node;
8402 /* This clobbers the attrs stored in `decl' from `attrlist'. */
8403 /* The decl and setting of decl_attr is also turned off. */
8404 decl = build_decl_attribute_variant (decl, decl_attr);
8407 /* [class.conv.ctor]
8409 A constructor declared without the function-specifier
8410 explicit that can be called with a single parameter
8411 specifies a conversion from the type of its first
8412 parameter to the type of its class. Such a constructor
8413 is called a converting constructor. */
8415 DECL_NONCONVERTING_P (decl) = 1;
8416 else if (DECL_CONSTRUCTOR_P (decl))
8418 /* The constructor can be called with exactly one
8419 parameter if there is at least one parameter, and
8420 any subsequent parameters have default arguments.
8421 Ignore any compiler-added parms. */
8422 tree arg_types = FUNCTION_FIRST_USER_PARMTYPE (decl);
8424 if (arg_types == void_list_node
8426 && TREE_CHAIN (arg_types)
8427 && TREE_CHAIN (arg_types) != void_list_node
8428 && !TREE_PURPOSE (TREE_CHAIN (arg_types))))
8429 DECL_NONCONVERTING_P (decl) = 1;
8432 else if (TREE_CODE (type) == METHOD_TYPE)
8434 /* We only get here for friend declarations of
8435 members of other classes. */
8436 /* All method decls are public, so tell grokfndecl to set
8437 TREE_PUBLIC, also. */
8438 decl = grokfndecl (ctype, type,
8439 TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
8440 ? unqualified_id : dname,
8443 virtualp, flags, memfn_quals, raises,
8444 friendp ? -1 : 0, friendp, 1, 0, sfk,
8445 funcdef_flag, template_count, in_namespace,
8447 if (decl == NULL_TREE)
8448 return error_mark_node;
8450 else if (!staticp && !dependent_type_p (type)
8451 && !COMPLETE_TYPE_P (complete_type (type))
8452 && (TREE_CODE (type) != ARRAY_TYPE || initialized == 0))
8455 error ("field %qD has incomplete type", unqualified_id);
8457 error ("name %qT has incomplete type", type);
8459 /* If we're instantiating a template, tell them which
8460 instantiation made the field's type be incomplete. */
8461 if (current_class_type
8462 && TYPE_NAME (current_class_type)
8463 && IDENTIFIER_TEMPLATE (TYPE_IDENTIFIER (current_class_type))
8465 && declspecs->type == type)
8466 error (" in instantiation of template %qT",
8467 current_class_type);
8469 return error_mark_node;
8475 error ("%qE is neither function nor member function; "
8476 "cannot be declared friend", unqualified_id);
8484 /* Friends are treated specially. */
8485 if (ctype == current_class_type)
8486 ; /* We already issued a pedwarn. */
8487 else if (decl && DECL_NAME (decl))
8489 if (template_class_depth (current_class_type) == 0)
8491 decl = check_explicit_specialization
8492 (unqualified_id, decl, template_count,
8493 2 * funcdef_flag + 4);
8494 if (decl == error_mark_node)
8495 return error_mark_node;
8498 decl = do_friend (ctype, unqualified_id, decl,
8504 return error_mark_node;
8507 /* Structure field. It may not be a function, except for C++. */
8509 if (decl == NULL_TREE)
8515 /* An attempt is being made to initialize a non-static
8516 member. But, from [class.mem]:
8518 4 A member-declarator can contain a
8519 constant-initializer only if it declares a static
8520 member (_class.static_) of integral or enumeration
8521 type, see _class.static.data_.
8523 This used to be relatively common practice, but
8524 the rest of the compiler does not correctly
8525 handle the initialization unless the member is
8526 static so we make it static below. */
8527 pedwarn ("ISO C++ forbids initialization of member %qD",
8529 pedwarn ("making %qD static", unqualified_id);
8533 if (uses_template_parms (type))
8534 /* We'll check at instantiation time. */
8536 else if (check_static_variable_definition (unqualified_id,
8538 /* If we just return the declaration, crashes
8539 will sometimes occur. We therefore return
8540 void_type_node, as if this was a friend
8541 declaration, to cause callers to completely
8542 ignore this declaration. */
8543 return error_mark_node;
8548 /* C++ allows static class members. All other work
8549 for this is done by grokfield. */
8550 decl = build_lang_decl (VAR_DECL, unqualified_id, type);
8551 set_linkage_for_static_data_member (decl);
8552 /* Even if there is an in-class initialization, DECL
8553 is considered undefined until an out-of-class
8554 definition is provided. */
8555 DECL_EXTERNAL (decl) = 1;
8558 DECL_TLS_MODEL (decl) = decl_default_tls_model (decl);
8562 decl = build_decl (FIELD_DECL, unqualified_id, type);
8563 DECL_NONADDRESSABLE_P (decl) = bitfield;
8564 if (bitfield && !unqualified_id)
8565 TREE_NO_WARNING (decl) = 1;
8567 if (storage_class == sc_mutable)
8569 DECL_MUTABLE_P (decl) = 1;
8570 storage_class = sc_none;
8574 bad_specifiers (decl, "field", virtualp,
8575 memfn_quals != TYPE_UNQUALIFIED,
8576 inlinep, friendp, raises != NULL_TREE);
8579 else if (TREE_CODE (type) == FUNCTION_TYPE
8580 || TREE_CODE (type) == METHOD_TYPE)
8585 if (!unqualified_id)
8586 return error_mark_node;
8588 if (TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR)
8589 original_name = dname;
8591 original_name = unqualified_id;
8593 if (storage_class == sc_auto)
8594 error ("storage class %<auto%> invalid for function %qs", name);
8595 else if (storage_class == sc_register)
8596 error ("storage class %<register%> invalid for function %qs", name);
8598 error ("storage class %<__thread%> invalid for function %qs", name);
8600 /* Function declaration not at top level.
8601 Storage classes other than `extern' are not allowed
8602 and `extern' makes no difference. */
8603 if (! toplevel_bindings_p ()
8604 && (storage_class == sc_static
8605 || declspecs->specs[(int)ds_inline])
8608 if (storage_class == sc_static)
8609 pedwarn ("%<static%> specified invalid for function %qs "
8610 "declared out of global scope", name);
8612 pedwarn ("%<inline%> specifier invalid for function %qs "
8613 "declared out of global scope", name);
8616 if (ctype == NULL_TREE)
8620 error ("virtual non-class function %qs", name);
8624 else if (TREE_CODE (type) == FUNCTION_TYPE && staticp < 2
8625 && !NEW_DELETE_OPNAME_P (original_name))
8626 type = build_method_type_directly (ctype,
8628 TYPE_ARG_TYPES (type));
8630 /* Record presence of `static'. */
8631 publicp = (ctype != NULL_TREE
8632 || storage_class == sc_extern
8633 || storage_class != sc_static);
8635 decl = grokfndecl (ctype, type, original_name, parms, unqualified_id,
8636 virtualp, flags, memfn_quals, raises,
8638 publicp, inlinep, sfk, funcdef_flag,
8639 template_count, in_namespace, attrlist);
8640 if (decl == NULL_TREE)
8641 return error_mark_node;
8645 int invalid_static = 0;
8647 /* Don't allow a static member function in a class, and forbid
8648 declaring main to be static. */
8649 if (TREE_CODE (type) == METHOD_TYPE)
8651 pedwarn ("cannot declare member function %qD to have "
8652 "static linkage", decl);
8655 else if (current_function_decl)
8657 /* FIXME need arm citation */
8658 error ("cannot declare static function inside another function");
8665 storage_class = sc_none;
8671 /* It's a variable. */
8673 /* An uninitialized decl with `extern' is a reference. */
8674 decl = grokvardecl (type, unqualified_id,
8677 (type_quals & TYPE_QUAL_CONST) != 0,
8678 ctype ? ctype : in_namespace);
8679 bad_specifiers (decl, "variable", virtualp,
8680 memfn_quals != TYPE_UNQUALIFIED,
8681 inlinep, friendp, raises != NULL_TREE);
8685 DECL_CONTEXT (decl) = ctype;
8688 pedwarn ("%<static%> may not be used when defining "
8689 "(as opposed to declaring) a static data member");
8691 storage_class = sc_none;
8693 if (storage_class == sc_register && TREE_STATIC (decl))
8695 error ("static member %qD declared %<register%>", decl);
8696 storage_class = sc_none;
8698 if (storage_class == sc_extern && pedantic)
8700 pedwarn ("cannot explicitly declare member %q#D to have "
8703 storage_class = sc_none;
8708 /* Record `register' declaration for warnings on &
8709 and in case doing stupid register allocation. */
8711 if (storage_class == sc_register)
8712 DECL_REGISTER (decl) = 1;
8713 else if (storage_class == sc_extern)
8714 DECL_THIS_EXTERN (decl) = 1;
8715 else if (storage_class == sc_static)
8716 DECL_THIS_STATIC (decl) = 1;
8718 /* Record constancy and volatility. There's no need to do this
8719 when processing a template; we'll do this for the instantiated
8720 declaration based on the type of DECL. */
8721 if (!processing_template_decl)
8722 cp_apply_type_quals_to_decl (type_quals, decl);
8725 TREE_NO_WARNING (decl) = 1;
8731 /* Subroutine of start_function. Ensure that each of the parameter
8732 types (as listed in PARMS) is complete, as is required for a
8733 function definition. */
8736 require_complete_types_for_parms (tree parms)
8738 for (; parms; parms = TREE_CHAIN (parms))
8740 if (dependent_type_p (TREE_TYPE (parms)))
8742 if (!VOID_TYPE_P (TREE_TYPE (parms))
8743 && complete_type_or_else (TREE_TYPE (parms), parms))
8745 relayout_decl (parms);
8746 DECL_ARG_TYPE (parms) = type_passed_as (TREE_TYPE (parms));
8749 /* grokparms or complete_type_or_else will have already issued
8751 TREE_TYPE (parms) = error_mark_node;
8755 /* Returns nonzero if T is a local variable. */
8758 local_variable_p (tree t)
8760 if ((TREE_CODE (t) == VAR_DECL
8761 /* A VAR_DECL with a context that is a _TYPE is a static data
8763 && !TYPE_P (CP_DECL_CONTEXT (t))
8764 /* Any other non-local variable must be at namespace scope. */
8765 && !DECL_NAMESPACE_SCOPE_P (t))
8766 || (TREE_CODE (t) == PARM_DECL))
8772 /* Returns nonzero if T is an automatic local variable or a label.
8773 (These are the declarations that need to be remapped when the code
8774 containing them is duplicated.) */
8777 nonstatic_local_decl_p (tree t)
8779 return ((local_variable_p (t) && !TREE_STATIC (t))
8780 || TREE_CODE (t) == LABEL_DECL
8781 || TREE_CODE (t) == RESULT_DECL);
8784 /* Like local_variable_p, but suitable for use as a tree-walking
8788 local_variable_p_walkfn (tree *tp, int *walk_subtrees,
8789 void *data ATTRIBUTE_UNUSED)
8791 if (local_variable_p (*tp) && !DECL_ARTIFICIAL (*tp))
8793 else if (TYPE_P (*tp))
8800 /* Check that ARG, which is a default-argument expression for a
8801 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
8802 something goes wrong. DECL may also be a _TYPE node, rather than a
8803 DECL, if there is no DECL available. */
8806 check_default_argument (tree decl, tree arg)
8811 if (TREE_CODE (arg) == DEFAULT_ARG)
8812 /* We get a DEFAULT_ARG when looking at an in-class declaration
8813 with a default argument. Ignore the argument for now; we'll
8814 deal with it after the class is complete. */
8823 decl_type = TREE_TYPE (decl);
8825 if (arg == error_mark_node
8826 || decl == error_mark_node
8827 || TREE_TYPE (arg) == error_mark_node
8828 || decl_type == error_mark_node)
8829 /* Something already went wrong. There's no need to check
8831 return error_mark_node;
8833 /* [dcl.fct.default]
8835 A default argument expression is implicitly converted to the
8837 if (!TREE_TYPE (arg)
8838 || !can_convert_arg (decl_type, TREE_TYPE (arg), arg, LOOKUP_NORMAL))
8841 error ("default argument for %q#D has type %qT",
8842 decl, TREE_TYPE (arg));
8844 error ("default argument for parameter of type %qT has type %qT",
8845 decl_type, TREE_TYPE (arg));
8847 return error_mark_node;
8850 /* [dcl.fct.default]
8852 Local variables shall not be used in default argument
8855 The keyword `this' shall not be used in a default argument of a
8857 var = walk_tree_without_duplicates (&arg, local_variable_p_walkfn,
8861 error ("default argument %qE uses local variable %qD", arg, var);
8862 return error_mark_node;
8869 /* Decode the list of parameter types for a function type.
8870 Given the list of things declared inside the parens,
8871 return a list of types.
8873 If this parameter does not end with an ellipsis, we append
8876 *PARMS is set to the chain of PARM_DECLs created. */
8879 grokparms (cp_parameter_declarator *first_parm, tree *parms)
8881 tree result = NULL_TREE;
8882 tree decls = NULL_TREE;
8883 int ellipsis = !first_parm || first_parm->ellipsis_p;
8884 cp_parameter_declarator *parm;
8887 for (parm = first_parm; parm != NULL; parm = parm->next)
8889 tree type = NULL_TREE;
8890 tree init = parm->default_argument;
8894 if (parm == no_parameters)
8897 attrs = parm->decl_specifiers.attributes;
8898 parm->decl_specifiers.attributes = NULL_TREE;
8899 decl = grokdeclarator (parm->declarator, &parm->decl_specifiers,
8900 PARM, init != NULL_TREE, &attrs);
8901 if (! decl || TREE_TYPE (decl) == error_mark_node)
8905 cplus_decl_attributes (&decl, attrs, 0);
8907 type = TREE_TYPE (decl);
8908 if (VOID_TYPE_P (type))
8910 if (same_type_p (type, void_type_node)
8911 && DECL_SELF_REFERENCE_P (type)
8912 && !DECL_NAME (decl) && !result && !parm->next && !ellipsis)
8913 /* this is a parmlist of `(void)', which is ok. */
8915 cxx_incomplete_type_error (decl, type);
8916 /* It's not a good idea to actually create parameters of
8917 type `void'; other parts of the compiler assume that a
8918 void type terminates the parameter list. */
8919 type = error_mark_node;
8920 TREE_TYPE (decl) = error_mark_node;
8923 if (type != error_mark_node)
8925 /* Top-level qualifiers on the parameters are
8926 ignored for function types. */
8927 type = cp_build_qualified_type (type, 0);
8928 if (TREE_CODE (type) == METHOD_TYPE)
8930 error ("parameter %qD invalidly declared method type", decl);
8931 type = build_pointer_type (type);
8932 TREE_TYPE (decl) = type;
8934 else if (abstract_virtuals_error (decl, type))
8935 any_error = 1; /* Seems like a good idea. */
8936 else if (POINTER_TYPE_P (type))
8938 /* [dcl.fct]/6, parameter types cannot contain pointers
8939 (references) to arrays of unknown bound. */
8940 tree t = TREE_TYPE (type);
8941 int ptr = TYPE_PTR_P (type);
8947 else if (TREE_CODE (t) != ARRAY_TYPE)
8949 else if (!TYPE_DOMAIN (t))
8953 if (TREE_CODE (t) == ARRAY_TYPE)
8954 error ("parameter %qD includes %s to array of unknown "
8956 decl, ptr ? "pointer" : "reference", t);
8961 else if (init && !processing_template_decl)
8962 init = check_default_argument (decl, init);
8965 if (TREE_CODE (decl) == PARM_DECL
8966 && FUNCTION_PARAMETER_PACK_P (decl)
8968 error ("parameter packs must be at the end of the parameter list");
8970 TREE_CHAIN (decl) = decls;
8972 result = tree_cons (init, type, result);
8974 decls = nreverse (decls);
8975 result = nreverse (result);
8977 result = chainon (result, void_list_node);
8984 /* D is a constructor or overloaded `operator='.
8986 Let T be the class in which D is declared. Then, this function
8989 -1 if D's is an ill-formed constructor or copy assignment operator
8990 whose first parameter is of type `T'.
8991 0 if D is not a copy constructor or copy assignment
8993 1 if D is a copy constructor or copy assignment operator whose
8994 first parameter is a reference to const qualified T.
8995 2 if D is a copy constructor or copy assignment operator whose
8996 first parameter is a reference to non-const qualified T.
8998 This function can be used as a predicate. Positive values indicate
8999 a copy constructor and nonzero values indicate a copy assignment
9009 gcc_assert (DECL_FUNCTION_MEMBER_P (d));
9011 if (TREE_CODE (d) == TEMPLATE_DECL
9012 || (DECL_TEMPLATE_INFO (d)
9013 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d))))
9014 /* Instantiations of template member functions are never copy
9015 functions. Note that member functions of templated classes are
9016 represented as template functions internally, and we must
9017 accept those as copy functions. */
9020 args = FUNCTION_FIRST_USER_PARMTYPE (d);
9024 arg_type = TREE_VALUE (args);
9025 if (arg_type == error_mark_node)
9028 if (TYPE_MAIN_VARIANT (arg_type) == DECL_CONTEXT (d))
9030 /* Pass by value copy assignment operator. */
9033 else if (TREE_CODE (arg_type) == REFERENCE_TYPE
9034 && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type)) == DECL_CONTEXT (d))
9036 if (CP_TYPE_CONST_P (TREE_TYPE (arg_type)))
9042 args = TREE_CHAIN (args);
9044 if (args && args != void_list_node && !TREE_PURPOSE (args))
9045 /* There are more non-optional args. */
9051 /* Remember any special properties of member function DECL. */
9053 void grok_special_member_properties (tree decl)
9057 if (!DECL_NONSTATIC_MEMBER_FUNCTION_P (decl))
9060 class_type = DECL_CONTEXT (decl);
9061 if (DECL_CONSTRUCTOR_P (decl))
9063 int ctor = copy_fn_p (decl);
9065 TYPE_HAS_CONSTRUCTOR (class_type) = 1;
9071 A non-template constructor for class X is a copy
9072 constructor if its first parameter is of type X&, const
9073 X&, volatile X& or const volatile X&, and either there
9074 are no other parameters or else all other parameters have
9075 default arguments. */
9076 TYPE_HAS_INIT_REF (class_type) = 1;
9078 TYPE_HAS_CONST_INIT_REF (class_type) = 1;
9080 else if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl)))
9081 TYPE_HAS_DEFAULT_CONSTRUCTOR (class_type) = 1;
9083 else if (DECL_OVERLOADED_OPERATOR_P (decl) == NOP_EXPR)
9087 A non-template assignment operator for class X is a copy
9088 assignment operator if its parameter is of type X, X&, const
9089 X&, volatile X& or const volatile X&. */
9091 int assop = copy_fn_p (decl);
9095 TYPE_HAS_ASSIGN_REF (class_type) = 1;
9097 TYPE_HAS_CONST_ASSIGN_REF (class_type) = 1;
9102 /* Check a constructor DECL has the correct form. Complains
9103 if the class has a constructor of the form X(X). */
9106 grok_ctor_properties (tree ctype, tree decl)
9108 int ctor_parm = copy_fn_p (decl);
9114 A declaration of a constructor for a class X is ill-formed if
9115 its first parameter is of type (optionally cv-qualified) X
9116 and either there are no other parameters or else all other
9117 parameters have default arguments.
9119 We *don't* complain about member template instantiations that
9120 have this form, though; they can occur as we try to decide
9121 what constructor to use during overload resolution. Since
9122 overload resolution will never prefer such a constructor to
9123 the non-template copy constructor (which is either explicitly
9124 or implicitly defined), there's no need to worry about their
9125 existence. Theoretically, they should never even be
9126 instantiated, but that's hard to forestall. */
9127 error ("invalid constructor; you probably meant %<%T (const %T&)%>",
9135 /* An operator with this code is unary, but can also be binary. */
9138 ambi_op_p (enum tree_code code)
9140 return (code == INDIRECT_REF
9141 || code == ADDR_EXPR
9142 || code == UNARY_PLUS_EXPR
9143 || code == NEGATE_EXPR
9144 || code == PREINCREMENT_EXPR
9145 || code == PREDECREMENT_EXPR);
9148 /* An operator with this name can only be unary. */
9151 unary_op_p (enum tree_code code)
9153 return (code == TRUTH_NOT_EXPR
9154 || code == BIT_NOT_EXPR
9155 || code == COMPONENT_REF
9156 || code == TYPE_EXPR);
9159 /* DECL is a declaration for an overloaded operator. If COMPLAIN is true,
9160 errors are issued for invalid declarations. */
9163 grok_op_properties (tree decl, bool complain)
9165 tree argtypes = TYPE_ARG_TYPES (TREE_TYPE (decl));
9167 int methodp = (TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE);
9168 tree name = DECL_NAME (decl);
9169 enum tree_code operator_code;
9174 /* Count the number of arguments and check for ellipsis. */
9175 for (argtype = argtypes, arity = 0;
9176 argtype && argtype != void_list_node;
9177 argtype = TREE_CHAIN (argtype))
9179 ellipsis_p = !argtype;
9181 class_type = DECL_CONTEXT (decl);
9182 if (class_type && !CLASS_TYPE_P (class_type))
9183 class_type = NULL_TREE;
9185 if (DECL_CONV_FN_P (decl))
9186 operator_code = TYPE_EXPR;
9190 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
9191 if (ansi_opname (CODE) == name) \
9193 operator_code = (CODE); \
9196 else if (ansi_assopname (CODE) == name) \
9198 operator_code = (CODE); \
9199 DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
9203 #include "operators.def"
9209 gcc_assert (operator_code != LAST_CPLUS_TREE_CODE);
9210 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
9213 switch (operator_code)
9216 TYPE_HAS_NEW_OPERATOR (class_type) = 1;
9220 TYPE_GETS_DELETE (class_type) |= 1;
9224 TYPE_HAS_ARRAY_NEW_OPERATOR (class_type) = 1;
9227 case VEC_DELETE_EXPR:
9228 TYPE_GETS_DELETE (class_type) |= 2;
9235 /* [basic.std.dynamic.allocation]/1:
9237 A program is ill-formed if an allocation function is declared
9238 in a namespace scope other than global scope or declared static
9241 The same also holds true for deallocation functions. */
9242 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR
9243 || operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
9245 if (DECL_NAMESPACE_SCOPE_P (decl))
9247 if (CP_DECL_CONTEXT (decl) != global_namespace)
9249 error ("%qD may not be declared within a namespace", decl);
9252 else if (!TREE_PUBLIC (decl))
9254 error ("%qD may not be declared as static", decl);
9260 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR)
9261 TREE_TYPE (decl) = coerce_new_type (TREE_TYPE (decl));
9262 else if (operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
9263 TREE_TYPE (decl) = coerce_delete_type (TREE_TYPE (decl));
9266 /* An operator function must either be a non-static member function
9267 or have at least one parameter of a class, a reference to a class,
9268 an enumeration, or a reference to an enumeration. 13.4.0.6 */
9269 if (! methodp || DECL_STATIC_FUNCTION_P (decl))
9271 if (operator_code == TYPE_EXPR
9272 || operator_code == CALL_EXPR
9273 || operator_code == COMPONENT_REF
9274 || operator_code == ARRAY_REF
9275 || operator_code == NOP_EXPR)
9277 error ("%qD must be a nonstatic member function", decl);
9284 if (DECL_STATIC_FUNCTION_P (decl))
9286 error ("%qD must be either a non-static member "
9287 "function or a non-member function", decl);
9291 for (p = argtypes; p && p != void_list_node; p = TREE_CHAIN (p))
9293 tree arg = non_reference (TREE_VALUE (p));
9294 if (arg == error_mark_node)
9297 /* IS_AGGR_TYPE, rather than CLASS_TYPE_P, is used
9298 because these checks are performed even on
9299 template functions. */
9300 if (IS_AGGR_TYPE (arg) || TREE_CODE (arg) == ENUMERAL_TYPE)
9304 if (!p || p == void_list_node)
9307 error ("%qD must have an argument of class or "
9308 "enumerated type", decl);
9314 /* There are no restrictions on the arguments to an overloaded
9316 if (operator_code == CALL_EXPR)
9319 /* Warn about conversion operators that will never be used. */
9320 if (IDENTIFIER_TYPENAME_P (name)
9321 && ! DECL_TEMPLATE_INFO (decl)
9323 /* Warn only declaring the function; there is no need to
9324 warn again about out-of-class definitions. */
9325 && class_type == current_class_type)
9327 tree t = TREE_TYPE (name);
9328 int ref = (TREE_CODE (t) == REFERENCE_TYPE);
9329 const char *what = 0;
9332 t = TYPE_MAIN_VARIANT (TREE_TYPE (t));
9334 if (TREE_CODE (t) == VOID_TYPE)
9336 else if (class_type)
9338 if (t == class_type)
9339 what = "the same type";
9340 /* Don't force t to be complete here. */
9341 else if (IS_AGGR_TYPE (t)
9342 && COMPLETE_TYPE_P (t)
9343 && DERIVED_FROM_P (t, class_type))
9344 what = "a base class";
9348 warning (OPT_Wconversion, "conversion to %s%s will never use a type "
9349 "conversion operator",
9350 ref ? "a reference to " : "", what);
9353 if (operator_code == COND_EXPR)
9356 error ("ISO C++ prohibits overloading operator ?:");
9359 else if (ellipsis_p)
9361 error ("%qD must not have variable number of arguments", decl);
9364 else if (ambi_op_p (operator_code))
9367 /* We pick the one-argument operator codes by default, so
9368 we don't have to change anything. */
9370 else if (arity == 2)
9372 /* If we thought this was a unary operator, we now know
9373 it to be a binary operator. */
9374 switch (operator_code)
9377 operator_code = MULT_EXPR;
9381 operator_code = BIT_AND_EXPR;
9384 case UNARY_PLUS_EXPR:
9385 operator_code = PLUS_EXPR;
9389 operator_code = MINUS_EXPR;
9392 case PREINCREMENT_EXPR:
9393 operator_code = POSTINCREMENT_EXPR;
9396 case PREDECREMENT_EXPR:
9397 operator_code = POSTDECREMENT_EXPR;
9404 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
9406 if ((operator_code == POSTINCREMENT_EXPR
9407 || operator_code == POSTDECREMENT_EXPR)
9408 && ! processing_template_decl
9409 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes)), integer_type_node))
9412 error ("postfix %qD must take %<int%> as its argument",
9415 error ("postfix %qD must take %<int%> as its second "
9423 error ("%qD must take either zero or one argument", decl);
9425 error ("%qD must take either one or two arguments", decl);
9429 /* More Effective C++ rule 6. */
9431 && (operator_code == POSTINCREMENT_EXPR
9432 || operator_code == POSTDECREMENT_EXPR
9433 || operator_code == PREINCREMENT_EXPR
9434 || operator_code == PREDECREMENT_EXPR))
9436 tree arg = TREE_VALUE (argtypes);
9437 tree ret = TREE_TYPE (TREE_TYPE (decl));
9438 if (methodp || TREE_CODE (arg) == REFERENCE_TYPE)
9439 arg = TREE_TYPE (arg);
9440 arg = TYPE_MAIN_VARIANT (arg);
9441 if (operator_code == PREINCREMENT_EXPR
9442 || operator_code == PREDECREMENT_EXPR)
9444 if (TREE_CODE (ret) != REFERENCE_TYPE
9445 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret)),
9447 warning (OPT_Weffc__, "prefix %qD should return %qT", decl,
9448 build_reference_type (arg));
9452 if (!same_type_p (TYPE_MAIN_VARIANT (ret), arg))
9453 warning (OPT_Weffc__, "postfix %qD should return %qT", decl, arg);
9457 else if (unary_op_p (operator_code))
9462 error ("%qD must take %<void%>", decl);
9464 error ("%qD must take exactly one argument", decl);
9468 else /* if (binary_op_p (operator_code)) */
9473 error ("%qD must take exactly one argument", decl);
9475 error ("%qD must take exactly two arguments", decl);
9479 /* More Effective C++ rule 7. */
9481 && (operator_code == TRUTH_ANDIF_EXPR
9482 || operator_code == TRUTH_ORIF_EXPR
9483 || operator_code == COMPOUND_EXPR))
9484 warning (OPT_Weffc__, "user-defined %qD always evaluates both arguments",
9488 /* Effective C++ rule 23. */
9491 && !DECL_ASSIGNMENT_OPERATOR_P (decl)
9492 && (operator_code == PLUS_EXPR
9493 || operator_code == MINUS_EXPR
9494 || operator_code == TRUNC_DIV_EXPR
9495 || operator_code == MULT_EXPR
9496 || operator_code == TRUNC_MOD_EXPR)
9497 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl))) == REFERENCE_TYPE)
9498 warning (OPT_Weffc__, "%qD should return by value", decl);
9501 for (; argtypes && argtypes != void_list_node;
9502 argtypes = TREE_CHAIN (argtypes))
9503 if (TREE_PURPOSE (argtypes))
9505 TREE_PURPOSE (argtypes) = NULL_TREE;
9506 if (operator_code == POSTINCREMENT_EXPR
9507 || operator_code == POSTDECREMENT_EXPR)
9510 pedwarn ("%qD cannot have default arguments", decl);
9514 error ("%qD cannot have default arguments", decl);
9522 /* Return a string giving the keyword associate with CODE. */
9525 tag_name (enum tag_types code)
9544 /* Name lookup in an elaborated-type-specifier (after the keyword
9545 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
9546 elaborated-type-specifier is invalid, issue a diagnostic and return
9547 error_mark_node; otherwise, return the *_TYPE to which it referred.
9548 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
9551 check_elaborated_type_specifier (enum tag_types tag_code,
9553 bool allow_template_p)
9559 struct S { struct S *p; };
9561 name lookup will find the TYPE_DECL for the implicit "S::S"
9562 typedef. Adjust for that here. */
9563 if (DECL_SELF_REFERENCE_P (decl))
9564 decl = TYPE_NAME (TREE_TYPE (decl));
9566 type = TREE_TYPE (decl);
9568 /* Check TEMPLATE_TYPE_PARM first because DECL_IMPLICIT_TYPEDEF_P
9569 is false for this case as well. */
9570 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
9572 error ("using template type parameter %qT after %qs",
9573 type, tag_name (tag_code));
9574 return error_mark_node;
9578 If the identifier resolves to a typedef-name or a template
9579 type-parameter, the elaborated-type-specifier is ill-formed.
9581 In other words, the only legitimate declaration to use in the
9582 elaborated type specifier is the implicit typedef created when
9583 the type is declared. */
9584 else if (!DECL_IMPLICIT_TYPEDEF_P (decl)
9585 && tag_code != typename_type)
9587 error ("using typedef-name %qD after %qs", decl, tag_name (tag_code));
9588 error ("%q+D has a previous declaration here", decl);
9589 return error_mark_node;
9591 else if (TREE_CODE (type) != RECORD_TYPE
9592 && TREE_CODE (type) != UNION_TYPE
9593 && tag_code != enum_type
9594 && tag_code != typename_type)
9596 error ("%qT referred to as %qs", type, tag_name (tag_code));
9597 error ("%q+T has a previous declaration here", type);
9598 return error_mark_node;
9600 else if (TREE_CODE (type) != ENUMERAL_TYPE
9601 && tag_code == enum_type)
9603 error ("%qT referred to as enum", type);
9604 error ("%q+T has a previous declaration here", type);
9605 return error_mark_node;
9607 else if (!allow_template_p
9608 && TREE_CODE (type) == RECORD_TYPE
9609 && CLASSTYPE_IS_TEMPLATE (type))
9611 /* If a class template appears as elaborated type specifier
9612 without a template header such as:
9614 template <class T> class C {};
9615 void f(class C); // No template header here
9617 then the required template argument is missing. */
9618 error ("template argument required for %<%s %T%>",
9619 tag_name (tag_code),
9620 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type)));
9621 return error_mark_node;
9627 /* Lookup NAME in elaborate type specifier in scope according to
9628 SCOPE and issue diagnostics if necessary.
9629 Return *_TYPE node upon success, NULL_TREE when the NAME is not
9630 found, and ERROR_MARK_NODE for type error. */
9633 lookup_and_check_tag (enum tag_types tag_code, tree name,
9634 tag_scope scope, bool template_header_p)
9638 if (scope == ts_global)
9640 /* First try ordinary name lookup, ignoring hidden class name
9641 injected via friend declaration. */
9642 decl = lookup_name_prefer_type (name, 2);
9643 /* If that fails, the name will be placed in the smallest
9644 non-class, non-function-prototype scope according to 3.3.1/5.
9645 We may already have a hidden name declared as friend in this
9646 scope. So lookup again but not ignoring hidden names.
9647 If we find one, that name will be made visible rather than
9648 creating a new tag. */
9650 decl = lookup_type_scope (name, ts_within_enclosing_non_class);
9653 decl = lookup_type_scope (name, scope);
9655 if (decl && DECL_CLASS_TEMPLATE_P (decl))
9656 decl = DECL_TEMPLATE_RESULT (decl);
9658 if (decl && TREE_CODE (decl) == TYPE_DECL)
9660 /* Look for invalid nested type:
9664 if (scope == ts_current && DECL_SELF_REFERENCE_P (decl))
9666 error ("%qD has the same name as the class in which it is "
9669 return error_mark_node;
9672 /* Two cases we need to consider when deciding if a class
9673 template is allowed as an elaborated type specifier:
9674 1. It is a self reference to its own class.
9675 2. It comes with a template header.
9679 template <class T> class C {
9680 class C *c1; // DECL_SELF_REFERENCE_P is true
9683 template <class U> class C; // template_header_p is true
9684 template <class T> class C<T>::D {
9685 class C *c2; // DECL_SELF_REFERENCE_P is true
9688 t = check_elaborated_type_specifier (tag_code,
9691 | DECL_SELF_REFERENCE_P (decl));
9698 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
9699 Define the tag as a forward-reference if it is not defined.
9701 If a declaration is given, process it here, and report an error if
9702 multiple declarations are not identical.
9704 SCOPE is TS_CURRENT when this is also a definition. Only look in
9705 the current frame for the name (since C++ allows new names in any
9706 scope.) It is TS_WITHIN_ENCLOSING_NON_CLASS if this is a friend
9707 declaration. Only look beginning from the current scope outward up
9708 till the nearest non-class scope. Otherwise it is TS_GLOBAL.
9710 TEMPLATE_HEADER_P is true when this declaration is preceded by
9711 a set of template parameters. */
9714 xref_tag (enum tag_types tag_code, tree name,
9715 tag_scope scope, bool template_header_p)
9717 enum tree_code code;
9719 tree context = NULL_TREE;
9721 timevar_push (TV_NAME_LOOKUP);
9723 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
9735 code = ENUMERAL_TYPE;
9741 /* In case of anonymous name, xref_tag is only called to
9742 make type node and push name. Name lookup is not required. */
9743 if (ANON_AGGRNAME_P (name))
9746 t = lookup_and_check_tag (tag_code, name,
9747 scope, template_header_p);
9749 if (t == error_mark_node)
9750 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
9752 if (scope != ts_current && t && current_class_type
9753 && template_class_depth (current_class_type)
9754 && template_header_p)
9756 /* Since SCOPE is not TS_CURRENT, we are not looking at a
9757 definition of this tag. Since, in addition, we are currently
9758 processing a (member) template declaration of a template
9759 class, we must be very careful; consider:
9766 { template <class V>
9767 friend struct S1; };
9769 Here, the S2::S1 declaration should not be confused with the
9770 outer declaration. In particular, the inner version should
9771 have a template parameter of level 2, not level 1. This
9772 would be particularly important if the member declaration
9775 template <class V = U> friend struct S1;
9777 say, when we should tsubst into `U' when instantiating
9778 S2. On the other hand, when presented with:
9788 we must find the inner binding eventually. We
9789 accomplish this by making sure that the new type we
9790 create to represent this declaration has the right
9792 context = TYPE_CONTEXT (t);
9798 /* If no such tag is yet defined, create a forward-reference node
9799 and record it as the "definition".
9800 When a real declaration of this type is found,
9801 the forward-reference will be altered into a real type. */
9802 if (code == ENUMERAL_TYPE)
9804 error ("use of enum %q#D without previous declaration", name);
9805 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
9809 t = make_aggr_type (code);
9810 TYPE_CONTEXT (t) = context;
9811 t = pushtag (name, t, scope);
9816 if (template_header_p && IS_AGGR_TYPE (t))
9818 if (!redeclare_class_template (t, current_template_parms))
9819 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
9821 else if (!processing_template_decl
9823 && CLASSTYPE_IS_TEMPLATE (t))
9825 error ("redeclaration of %qT as a non-template", t);
9826 error ("previous declaration %q+D", t);
9827 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
9830 /* Make injected friend class visible. */
9831 if (scope != ts_within_enclosing_non_class
9832 && hidden_name_p (TYPE_NAME (t)))
9834 DECL_ANTICIPATED (TYPE_NAME (t)) = 0;
9835 DECL_FRIEND_P (TYPE_NAME (t)) = 0;
9837 if (TYPE_TEMPLATE_INFO (t))
9839 DECL_ANTICIPATED (TYPE_TI_TEMPLATE (t)) = 0;
9840 DECL_FRIEND_P (TYPE_TI_TEMPLATE (t)) = 0;
9845 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, t);
9849 xref_tag_from_type (tree old, tree id, tag_scope scope)
9851 enum tag_types tag_kind;
9853 if (TREE_CODE (old) == RECORD_TYPE)
9854 tag_kind = (CLASSTYPE_DECLARED_CLASS (old) ? class_type : record_type);
9856 tag_kind = union_type;
9858 if (id == NULL_TREE)
9859 id = TYPE_IDENTIFIER (old);
9861 return xref_tag (tag_kind, id, scope, false);
9864 /* Create the binfo hierarchy for REF with (possibly NULL) base list
9865 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
9866 access_* node, and the TREE_VALUE is the type of the base-class.
9867 Non-NULL TREE_TYPE indicates virtual inheritance.
9869 Returns true if the binfo hierarchy was successfully created,
9870 false if an error was detected. */
9873 xref_basetypes (tree ref, tree base_list)
9876 tree binfo, base_binfo;
9877 unsigned max_vbases = 0; /* Maximum direct & indirect virtual bases. */
9878 unsigned max_bases = 0; /* Maximum direct bases. */
9880 tree default_access;
9881 tree igo_prev; /* Track Inheritance Graph Order. */
9883 if (ref == error_mark_node)
9886 /* The base of a derived class is private by default, all others are
9888 default_access = (TREE_CODE (ref) == RECORD_TYPE
9889 && CLASSTYPE_DECLARED_CLASS (ref)
9890 ? access_private_node : access_public_node);
9892 /* First, make sure that any templates in base-classes are
9893 instantiated. This ensures that if we call ourselves recursively
9894 we do not get confused about which classes are marked and which
9899 tree basetype = TREE_VALUE (*basep);
9901 if (!(processing_template_decl && uses_template_parms (basetype))
9902 && !complete_type_or_else (basetype, NULL))
9903 /* An incomplete type. Remove it from the list. */
9904 *basep = TREE_CHAIN (*basep);
9908 if (TREE_TYPE (*basep))
9910 if (CLASS_TYPE_P (basetype))
9911 max_vbases += VEC_length (tree, CLASSTYPE_VBASECLASSES (basetype));
9912 basep = &TREE_CHAIN (*basep);
9916 TYPE_MARKED_P (ref) = 1;
9918 /* The binfo slot should be empty, unless this is an (ill-formed)
9920 gcc_assert (!TYPE_BINFO (ref) || TYPE_SIZE (ref));
9921 gcc_assert (TYPE_MAIN_VARIANT (ref) == ref);
9923 binfo = make_tree_binfo (max_bases);
9925 TYPE_BINFO (ref) = binfo;
9926 BINFO_OFFSET (binfo) = size_zero_node;
9927 BINFO_TYPE (binfo) = ref;
9931 BINFO_BASE_ACCESSES (binfo) = VEC_alloc (tree, gc, max_bases);
9932 /* An aggregate cannot have baseclasses. */
9933 CLASSTYPE_NON_AGGREGATE (ref) = 1;
9935 if (TREE_CODE (ref) == UNION_TYPE)
9937 error ("derived union %qT invalid", ref);
9944 if (TYPE_FOR_JAVA (ref))
9946 error ("Java class %qT cannot have multiple bases", ref);
9953 CLASSTYPE_VBASECLASSES (ref) = VEC_alloc (tree, gc, max_vbases);
9955 if (TYPE_FOR_JAVA (ref))
9957 error ("Java class %qT cannot have virtual bases", ref);
9962 for (igo_prev = binfo; base_list; base_list = TREE_CHAIN (base_list))
9964 tree access = TREE_PURPOSE (base_list);
9965 int via_virtual = TREE_TYPE (base_list) != NULL_TREE;
9966 tree basetype = TREE_VALUE (base_list);
9968 if (access == access_default_node)
9969 access = default_access;
9971 if (PACK_EXPANSION_P (basetype))
9972 basetype = PACK_EXPANSION_PATTERN (basetype);
9973 if (TREE_CODE (basetype) == TYPE_DECL)
9974 basetype = TREE_TYPE (basetype);
9975 if (TREE_CODE (basetype) != RECORD_TYPE
9976 && TREE_CODE (basetype) != TYPENAME_TYPE
9977 && TREE_CODE (basetype) != TEMPLATE_TYPE_PARM
9978 && TREE_CODE (basetype) != BOUND_TEMPLATE_TEMPLATE_PARM)
9980 error ("base type %qT fails to be a struct or class type",
9985 if (TYPE_FOR_JAVA (basetype) && (current_lang_depth () == 0))
9986 TYPE_FOR_JAVA (ref) = 1;
9988 base_binfo = NULL_TREE;
9989 if (CLASS_TYPE_P (basetype) && !dependent_type_p (basetype))
9991 base_binfo = TYPE_BINFO (basetype);
9992 /* The original basetype could have been a typedef'd type. */
9993 basetype = BINFO_TYPE (base_binfo);
9995 /* Inherit flags from the base. */
9996 TYPE_HAS_NEW_OPERATOR (ref)
9997 |= TYPE_HAS_NEW_OPERATOR (basetype);
9998 TYPE_HAS_ARRAY_NEW_OPERATOR (ref)
9999 |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype);
10000 TYPE_GETS_DELETE (ref) |= TYPE_GETS_DELETE (basetype);
10001 TYPE_HAS_CONVERSION (ref) |= TYPE_HAS_CONVERSION (basetype);
10002 CLASSTYPE_DIAMOND_SHAPED_P (ref)
10003 |= CLASSTYPE_DIAMOND_SHAPED_P (basetype);
10004 CLASSTYPE_REPEATED_BASE_P (ref)
10005 |= CLASSTYPE_REPEATED_BASE_P (basetype);
10008 /* We must do this test after we've seen through a typedef
10010 if (TYPE_MARKED_P (basetype))
10012 if (basetype == ref)
10013 error ("recursive type %qT undefined", basetype);
10015 error ("duplicate base type %qT invalid", basetype);
10019 if (PACK_EXPANSION_P (TREE_VALUE (base_list)))
10020 /* Regenerate the pack expansion for the bases. */
10021 basetype = make_pack_expansion (basetype);
10023 TYPE_MARKED_P (basetype) = 1;
10025 base_binfo = copy_binfo (base_binfo, basetype, ref,
10026 &igo_prev, via_virtual);
10027 if (!BINFO_INHERITANCE_CHAIN (base_binfo))
10028 BINFO_INHERITANCE_CHAIN (base_binfo) = binfo;
10030 BINFO_BASE_APPEND (binfo, base_binfo);
10031 BINFO_BASE_ACCESS_APPEND (binfo, access);
10034 if (VEC_space (tree, CLASSTYPE_VBASECLASSES (ref), 1))
10035 /* If we have space in the vbase vector, we must have shared at
10036 least one of them, and are therefore diamond shaped. */
10037 CLASSTYPE_DIAMOND_SHAPED_P (ref) = 1;
10039 /* Unmark all the types. */
10040 for (i = 0; BINFO_BASE_ITERATE (binfo, i, base_binfo); i++)
10041 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
10042 TYPE_MARKED_P (ref) = 0;
10044 /* Now see if we have a repeated base type. */
10045 if (!CLASSTYPE_REPEATED_BASE_P (ref))
10047 for (base_binfo = binfo; base_binfo;
10048 base_binfo = TREE_CHAIN (base_binfo))
10050 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
10052 CLASSTYPE_REPEATED_BASE_P (ref) = 1;
10055 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 1;
10057 for (base_binfo = binfo; base_binfo;
10058 base_binfo = TREE_CHAIN (base_binfo))
10059 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
10060 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
10069 /* Begin compiling the definition of an enumeration type.
10071 Returns the type object, as yet incomplete.
10072 Also records info about it so that build_enumerator
10073 may be used to declare the individual values as they are read. */
10076 start_enum (tree name)
10080 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
10082 /* If this is the real definition for a previous forward reference,
10083 fill in the contents in the same object that used to be the
10084 forward reference. */
10086 enumtype = lookup_and_check_tag (enum_type, name,
10087 /*tag_scope=*/ts_current,
10088 /*template_header_p=*/false);
10090 if (enumtype != NULL_TREE && TREE_CODE (enumtype) == ENUMERAL_TYPE)
10092 error ("multiple definition of %q#T", enumtype);
10093 error ("%Jprevious definition here", TYPE_MAIN_DECL (enumtype));
10094 /* Clear out TYPE_VALUES, and start again. */
10095 TYPE_VALUES (enumtype) = NULL_TREE;
10099 /* In case of error, make a dummy enum to allow parsing to
10101 if (enumtype == error_mark_node)
10102 name = make_anon_name ();
10104 enumtype = make_node (ENUMERAL_TYPE);
10105 enumtype = pushtag (name, enumtype, /*tag_scope=*/ts_current);
10111 /* After processing and defining all the values of an enumeration type,
10112 install their decls in the enumeration type and finish it off.
10113 ENUMTYPE is the type object and VALUES a list of name-value pairs. */
10116 finish_enum (tree enumtype)
10125 bool use_short_enum;
10129 integer_type_kind itk;
10130 tree underlying_type = NULL_TREE;
10132 /* We built up the VALUES in reverse order. */
10133 TYPE_VALUES (enumtype) = nreverse (TYPE_VALUES (enumtype));
10135 /* For an enum defined in a template, just set the type of the values;
10136 all further processing is postponed until the template is
10137 instantiated. We need to set the type so that tsubst of a CONST_DECL
10139 if (processing_template_decl)
10141 for (values = TYPE_VALUES (enumtype);
10143 values = TREE_CHAIN (values))
10144 TREE_TYPE (TREE_VALUE (values)) = enumtype;
10145 if (at_function_scope_p ())
10146 add_stmt (build_min (TAG_DEFN, enumtype));
10150 /* Determine the minimum and maximum values of the enumerators. */
10151 if (TYPE_VALUES (enumtype))
10153 minnode = maxnode = NULL_TREE;
10155 for (values = TYPE_VALUES (enumtype);
10157 values = TREE_CHAIN (values))
10159 decl = TREE_VALUE (values);
10161 /* [dcl.enum]: Following the closing brace of an enum-specifier,
10162 each enumerator has the type of its enumeration. Prior to the
10163 closing brace, the type of each enumerator is the type of its
10164 initializing value. */
10165 TREE_TYPE (decl) = enumtype;
10167 /* Update the minimum and maximum values, if appropriate. */
10168 value = DECL_INITIAL (decl);
10169 if (value == error_mark_node)
10170 value = integer_zero_node;
10171 /* Figure out what the minimum and maximum values of the
10172 enumerators are. */
10174 minnode = maxnode = value;
10175 else if (tree_int_cst_lt (maxnode, value))
10177 else if (tree_int_cst_lt (value, minnode))
10184 If the enumerator-list is empty, the underlying type is as if
10185 the enumeration had a single enumerator with value 0. */
10186 minnode = maxnode = integer_zero_node;
10188 /* Compute the number of bits require to represent all values of the
10189 enumeration. We must do this before the type of MINNODE and
10190 MAXNODE are transformed, since min_precision relies on the
10191 TREE_TYPE of the value it is passed. */
10192 unsignedp = tree_int_cst_sgn (minnode) >= 0;
10193 lowprec = min_precision (minnode, unsignedp);
10194 highprec = min_precision (maxnode, unsignedp);
10195 precision = MAX (lowprec, highprec);
10197 /* Determine the underlying type of the enumeration.
10201 The underlying type of an enumeration is an integral type that
10202 can represent all the enumerator values defined in the
10203 enumeration. It is implementation-defined which integral type is
10204 used as the underlying type for an enumeration except that the
10205 underlying type shall not be larger than int unless the value of
10206 an enumerator cannot fit in an int or unsigned int.
10208 We use "int" or an "unsigned int" as the underlying type, even if
10209 a smaller integral type would work, unless the user has
10210 explicitly requested that we use the smallest possible type. The
10211 user can request that for all enumerations with a command line
10212 flag, or for just one enumeration with an attribute. */
10214 use_short_enum = flag_short_enums
10215 || lookup_attribute ("packed", TYPE_ATTRIBUTES (enumtype));
10217 for (itk = (use_short_enum ? itk_char : itk_int);
10221 underlying_type = integer_types[itk];
10222 if (TYPE_PRECISION (underlying_type) >= precision
10223 && TYPE_UNSIGNED (underlying_type) == unsignedp)
10226 if (itk == itk_none)
10230 IF no integral type can represent all the enumerator values, the
10231 enumeration is ill-formed. */
10232 error ("no integral type can represent all of the enumerator values "
10233 "for %qT", enumtype);
10234 precision = TYPE_PRECISION (long_long_integer_type_node);
10235 underlying_type = integer_types[itk_unsigned_long_long];
10238 /* Compute the minium and maximum values for the type.
10242 For an enumeration where emin is the smallest enumerator and emax
10243 is the largest, the values of the enumeration are the values of the
10244 underlying type in the range bmin to bmax, where bmin and bmax are,
10245 respectively, the smallest and largest values of the smallest bit-
10246 field that can store emin and emax. */
10248 /* The middle-end currently assumes that types with TYPE_PRECISION
10249 narrower than their underlying type are suitably zero or sign
10250 extended to fill their mode. g++ doesn't make these guarantees.
10251 Until the middle-end can represent such paradoxical types, we
10252 set the TYPE_PRECISION to the width of the underlying type. */
10253 TYPE_PRECISION (enumtype) = TYPE_PRECISION (underlying_type);
10255 set_min_and_max_values_for_integral_type (enumtype, precision, unsignedp);
10259 The value of sizeof() applied to an enumeration type, an object
10260 of an enumeration type, or an enumerator, is the value of sizeof()
10261 applied to the underlying type. */
10262 TYPE_SIZE (enumtype) = TYPE_SIZE (underlying_type);
10263 TYPE_SIZE_UNIT (enumtype) = TYPE_SIZE_UNIT (underlying_type);
10264 TYPE_MODE (enumtype) = TYPE_MODE (underlying_type);
10265 TYPE_ALIGN (enumtype) = TYPE_ALIGN (underlying_type);
10266 TYPE_USER_ALIGN (enumtype) = TYPE_USER_ALIGN (underlying_type);
10267 TYPE_UNSIGNED (enumtype) = TYPE_UNSIGNED (underlying_type);
10269 /* Convert each of the enumerators to the type of the underlying
10270 type of the enumeration. */
10271 for (values = TYPE_VALUES (enumtype); values; values = TREE_CHAIN (values))
10273 location_t saved_location;
10275 decl = TREE_VALUE (values);
10276 saved_location = input_location;
10277 input_location = DECL_SOURCE_LOCATION (decl);
10278 value = perform_implicit_conversion (underlying_type,
10279 DECL_INITIAL (decl));
10280 input_location = saved_location;
10282 /* Do not clobber shared ints. */
10283 value = copy_node (value);
10285 TREE_TYPE (value) = enumtype;
10286 DECL_INITIAL (decl) = value;
10287 TREE_VALUE (values) = value;
10290 /* Fix up all variant types of this enum type. */
10291 for (t = TYPE_MAIN_VARIANT (enumtype); t; t = TYPE_NEXT_VARIANT (t))
10293 TYPE_VALUES (t) = TYPE_VALUES (enumtype);
10294 TYPE_MIN_VALUE (t) = TYPE_MIN_VALUE (enumtype);
10295 TYPE_MAX_VALUE (t) = TYPE_MAX_VALUE (enumtype);
10296 TYPE_SIZE (t) = TYPE_SIZE (enumtype);
10297 TYPE_SIZE_UNIT (t) = TYPE_SIZE_UNIT (enumtype);
10298 TYPE_MODE (t) = TYPE_MODE (enumtype);
10299 TYPE_PRECISION (t) = TYPE_PRECISION (enumtype);
10300 TYPE_ALIGN (t) = TYPE_ALIGN (enumtype);
10301 TYPE_USER_ALIGN (t) = TYPE_USER_ALIGN (enumtype);
10302 TYPE_UNSIGNED (t) = TYPE_UNSIGNED (enumtype);
10305 /* Finish debugging output for this type. */
10306 rest_of_type_compilation (enumtype, namespace_bindings_p ());
10309 /* Build and install a CONST_DECL for an enumeration constant of the
10310 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
10311 Assignment of sequential values by default is handled here. */
10314 build_enumerator (tree name, tree value, tree enumtype)
10320 /* If the VALUE was erroneous, pretend it wasn't there; that will
10321 result in the enum being assigned the next value in sequence. */
10322 if (value == error_mark_node)
10325 /* Remove no-op casts from the value. */
10327 STRIP_TYPE_NOPS (value);
10329 if (! processing_template_decl)
10331 /* Validate and default VALUE. */
10332 if (value != NULL_TREE)
10334 value = integral_constant_value (value);
10336 if (TREE_CODE (value) == INTEGER_CST)
10338 value = perform_integral_promotions (value);
10339 constant_expression_warning (value);
10343 error ("enumerator value for %qD is not an integer constant", name);
10348 /* Default based on previous value. */
10349 if (value == NULL_TREE)
10351 if (TYPE_VALUES (enumtype))
10354 unsigned HOST_WIDE_INT lo;
10358 /* The next value is the previous value plus one. We can
10359 safely assume that the previous value is an INTEGER_CST.
10360 add_double doesn't know the type of the target expression,
10361 so we must check with int_fits_type_p as well. */
10362 prev_value = DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype)));
10363 overflowed = add_double (TREE_INT_CST_LOW (prev_value),
10364 TREE_INT_CST_HIGH (prev_value),
10366 value = build_int_cst_wide (TREE_TYPE (prev_value), lo, hi);
10367 overflowed |= !int_fits_type_p (value, TREE_TYPE (prev_value));
10371 error ("overflow in enumeration values at %qD", name);
10372 value = error_mark_node;
10376 value = integer_zero_node;
10379 /* Remove no-op casts from the value. */
10380 STRIP_TYPE_NOPS (value);
10383 /* C++ associates enums with global, function, or class declarations. */
10384 context = current_scope ();
10386 /* Build the actual enumeration constant. Note that the enumeration
10387 constants have the type of their initializers until the
10388 enumeration is complete:
10392 Following the closing brace of an enum-specifier, each enumer-
10393 ator has the type of its enumeration. Prior to the closing
10394 brace, the type of each enumerator is the type of its
10395 initializing value.
10397 In finish_enum we will reset the type. Of course, if we're
10398 processing a template, there may be no value. */
10399 type = value ? TREE_TYPE (value) : NULL_TREE;
10401 if (context && context == current_class_type)
10402 /* This enum declaration is local to the class. We need the full
10403 lang_decl so that we can record DECL_CLASS_CONTEXT, for example. */
10404 decl = build_lang_decl (CONST_DECL, name, type);
10406 /* It's a global enum, or it's local to a function. (Note local to
10407 a function could mean local to a class method. */
10408 decl = build_decl (CONST_DECL, name, type);
10410 DECL_CONTEXT (decl) = FROB_CONTEXT (context);
10411 TREE_CONSTANT (decl) = 1;
10412 TREE_INVARIANT (decl) = 1;
10413 TREE_READONLY (decl) = 1;
10414 DECL_INITIAL (decl) = value;
10416 if (context && context == current_class_type)
10417 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
10418 on the TYPE_FIELDS list for `S'. (That's so that you can say
10419 things like `S::i' later.) */
10420 finish_member_declaration (decl);
10424 /* Add this enumeration constant to the list for this type. */
10425 TYPE_VALUES (enumtype) = tree_cons (name, decl, TYPE_VALUES (enumtype));
10429 /* We're defining DECL. Make sure that it's type is OK. */
10432 check_function_type (tree decl, tree current_function_parms)
10434 tree fntype = TREE_TYPE (decl);
10435 tree return_type = complete_type (TREE_TYPE (fntype));
10437 /* In a function definition, arg types must be complete. */
10438 require_complete_types_for_parms (current_function_parms);
10440 if (dependent_type_p (return_type))
10442 if (!COMPLETE_OR_VOID_TYPE_P (return_type))
10444 tree args = TYPE_ARG_TYPES (fntype);
10446 error ("return type %q#T is incomplete", return_type);
10448 /* Make it return void instead. */
10449 if (TREE_CODE (fntype) == METHOD_TYPE)
10450 fntype = build_method_type_directly (TREE_TYPE (TREE_VALUE (args)),
10452 TREE_CHAIN (args));
10454 fntype = build_function_type (void_type_node, args);
10456 = build_exception_variant (fntype,
10457 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (decl)));
10460 abstract_virtuals_error (decl, TREE_TYPE (fntype));
10463 /* Create the FUNCTION_DECL for a function definition.
10464 DECLSPECS and DECLARATOR are the parts of the declaration;
10465 they describe the function's name and the type it returns,
10466 but twisted together in a fashion that parallels the syntax of C.
10468 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
10469 DECLARATOR is really the DECL for the function we are about to
10470 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
10471 indicating that the function is an inline defined in-class.
10473 This function creates a binding context for the function body
10474 as well as setting up the FUNCTION_DECL in current_function_decl.
10476 For C++, we must first check whether that datum makes any sense.
10477 For example, "class A local_a(1,2);" means that variable local_a
10478 is an aggregate of type A, which should have a constructor
10479 applied to it with the argument list [1, 2].
10481 On entry, DECL_INITIAL (decl1) should be NULL_TREE or error_mark_node,
10482 or may be a BLOCK if the function has been defined previously
10483 in this translation unit. On exit, DECL_INITIAL (decl1) will be
10484 error_mark_node if the function has never been defined, or
10485 a BLOCK if the function has been defined somewhere. */
10488 start_preparsed_function (tree decl1, tree attrs, int flags)
10490 tree ctype = NULL_TREE;
10493 int doing_friend = 0;
10494 struct cp_binding_level *bl;
10495 tree current_function_parms;
10496 struct c_fileinfo *finfo
10497 = get_fileinfo (LOCATION_FILE (DECL_SOURCE_LOCATION (decl1)));
10498 bool honor_interface;
10500 /* Sanity check. */
10501 gcc_assert (TREE_CODE (TREE_VALUE (void_list_node)) == VOID_TYPE);
10502 gcc_assert (TREE_CHAIN (void_list_node) == NULL_TREE);
10504 fntype = TREE_TYPE (decl1);
10505 if (TREE_CODE (fntype) == METHOD_TYPE)
10506 ctype = TYPE_METHOD_BASETYPE (fntype);
10508 /* ISO C++ 11.4/5. A friend function defined in a class is in
10509 the (lexical) scope of the class in which it is defined. */
10510 if (!ctype && DECL_FRIEND_P (decl1))
10512 ctype = DECL_FRIEND_CONTEXT (decl1);
10514 /* CTYPE could be null here if we're dealing with a template;
10515 for example, `inline friend float foo()' inside a template
10516 will have no CTYPE set. */
10517 if (ctype && TREE_CODE (ctype) != RECORD_TYPE)
10523 if (DECL_DECLARED_INLINE_P (decl1)
10524 && lookup_attribute ("noinline", attrs))
10525 warning (0, "inline function %q+D given attribute noinline", decl1);
10527 if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1))
10528 /* This is a constructor, we must ensure that any default args
10529 introduced by this definition are propagated to the clones
10530 now. The clones are used directly in overload resolution. */
10531 adjust_clone_args (decl1);
10533 /* Sometimes we don't notice that a function is a static member, and
10534 build a METHOD_TYPE for it. Fix that up now. */
10535 if (ctype != NULL_TREE && DECL_STATIC_FUNCTION_P (decl1)
10536 && TREE_CODE (TREE_TYPE (decl1)) == METHOD_TYPE)
10538 revert_static_member_fn (decl1);
10542 /* Set up current_class_type, and enter the scope of the class, if
10545 push_nested_class (ctype);
10546 else if (DECL_STATIC_FUNCTION_P (decl1))
10547 push_nested_class (DECL_CONTEXT (decl1));
10549 /* Now that we have entered the scope of the class, we must restore
10550 the bindings for any template parameters surrounding DECL1, if it
10551 is an inline member template. (Order is important; consider the
10552 case where a template parameter has the same name as a field of
10553 the class.) It is not until after this point that
10554 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
10555 if (flags & SF_INCLASS_INLINE)
10556 maybe_begin_member_template_processing (decl1);
10558 /* Effective C++ rule 15. */
10560 && DECL_OVERLOADED_OPERATOR_P (decl1) == NOP_EXPR
10561 && TREE_CODE (TREE_TYPE (fntype)) == VOID_TYPE)
10562 warning (OPT_Weffc__, "%<operator=%> should return a reference to %<*this%>");
10564 /* Make the init_value nonzero so pushdecl knows this is not tentative.
10565 error_mark_node is replaced below (in poplevel) with the BLOCK. */
10566 if (!DECL_INITIAL (decl1))
10567 DECL_INITIAL (decl1) = error_mark_node;
10569 /* This function exists in static storage.
10570 (This does not mean `static' in the C sense!) */
10571 TREE_STATIC (decl1) = 1;
10573 /* We must call push_template_decl after current_class_type is set
10574 up. (If we are processing inline definitions after exiting a
10575 class scope, current_class_type will be NULL_TREE until set above
10576 by push_nested_class.) */
10577 if (processing_template_decl)
10579 /* FIXME: Handle error_mark_node more gracefully. */
10580 tree newdecl1 = push_template_decl (decl1);
10581 if (newdecl1 != error_mark_node)
10585 /* We are now in the scope of the function being defined. */
10586 current_function_decl = decl1;
10588 /* Save the parm names or decls from this function's declarator
10589 where store_parm_decls will find them. */
10590 current_function_parms = DECL_ARGUMENTS (decl1);
10592 /* Make sure the parameter and return types are reasonable. When
10593 you declare a function, these types can be incomplete, but they
10594 must be complete when you define the function. */
10595 check_function_type (decl1, current_function_parms);
10597 /* Build the return declaration for the function. */
10598 restype = TREE_TYPE (fntype);
10599 /* Promote the value to int before returning it. */
10600 if (c_promoting_integer_type_p (restype))
10601 restype = type_promotes_to (restype);
10602 if (DECL_RESULT (decl1) == NULL_TREE)
10606 resdecl = build_decl (RESULT_DECL, 0, TYPE_MAIN_VARIANT (restype));
10607 DECL_ARTIFICIAL (resdecl) = 1;
10608 DECL_IGNORED_P (resdecl) = 1;
10609 DECL_RESULT (decl1) = resdecl;
10611 cp_apply_type_quals_to_decl (cp_type_quals (restype), resdecl);
10614 /* Let the user know we're compiling this function. */
10615 announce_function (decl1);
10617 /* Record the decl so that the function name is defined.
10618 If we already have a decl for this name, and it is a FUNCTION_DECL,
10619 use the old decl. */
10620 if (!processing_template_decl && !(flags & SF_PRE_PARSED))
10622 /* A specialization is not used to guide overload resolution. */
10623 if (!DECL_FUNCTION_MEMBER_P (decl1)
10624 && !(DECL_USE_TEMPLATE (decl1) &&
10625 PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl1))))
10627 tree olddecl = pushdecl (decl1);
10629 if (olddecl == error_mark_node)
10630 /* If something went wrong when registering the declaration,
10631 use DECL1; we have to have a FUNCTION_DECL to use when
10632 parsing the body of the function. */
10636 /* Otherwise, OLDDECL is either a previous declaration
10637 of the same function or DECL1 itself. */
10639 if (warn_missing_declarations
10640 && olddecl == decl1
10641 && !DECL_MAIN_P (decl1)
10642 && TREE_PUBLIC (decl1)
10643 && !DECL_DECLARED_INLINE_P (decl1))
10647 /* Check whether DECL1 is in an anonymous
10649 for (context = DECL_CONTEXT (decl1);
10651 context = DECL_CONTEXT (context))
10653 if (TREE_CODE (context) == NAMESPACE_DECL
10654 && DECL_NAME (context) == NULL_TREE)
10658 if (context == NULL)
10659 warning (OPT_Wmissing_declarations,
10660 "no previous declaration for %q+D", decl1);
10668 /* We need to set the DECL_CONTEXT. */
10669 if (!DECL_CONTEXT (decl1) && DECL_TEMPLATE_INFO (decl1))
10670 DECL_CONTEXT (decl1) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1));
10672 fntype = TREE_TYPE (decl1);
10674 /* If #pragma weak applies, mark the decl appropriately now.
10675 The pragma only applies to global functions. Because
10676 determining whether or not the #pragma applies involves
10677 computing the mangled name for the declaration, we cannot
10678 apply the pragma until after we have merged this declaration
10679 with any previous declarations; if the original declaration
10680 has a linkage specification, that specification applies to
10681 the definition as well, and may affect the mangled name. */
10682 if (!DECL_CONTEXT (decl1))
10683 maybe_apply_pragma_weak (decl1);
10686 /* Reset this in case the call to pushdecl changed it. */
10687 current_function_decl = decl1;
10689 gcc_assert (DECL_INITIAL (decl1));
10691 /* This function may already have been parsed, in which case just
10692 return; our caller will skip over the body without parsing. */
10693 if (DECL_INITIAL (decl1) != error_mark_node)
10696 /* Initialize RTL machinery. We cannot do this until
10697 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
10698 even when processing a template; this is how we get
10699 CFUN set up, and our per-function variables initialized.
10700 FIXME factor out the non-RTL stuff. */
10701 bl = current_binding_level;
10702 allocate_struct_function (decl1);
10703 current_binding_level = bl;
10705 /* Even though we're inside a function body, we still don't want to
10706 call expand_expr to calculate the size of a variable-sized array.
10707 We haven't necessarily assigned RTL to all variables yet, so it's
10708 not safe to try to expand expressions involving them. */
10709 cfun->x_dont_save_pending_sizes_p = 1;
10711 /* Start the statement-tree, start the tree now. */
10712 DECL_SAVED_TREE (decl1) = push_stmt_list ();
10714 /* If we are (erroneously) defining a function that we have already
10715 defined before, wipe out what we knew before. */
10716 if (!DECL_PENDING_INLINE_P (decl1))
10717 DECL_SAVED_FUNCTION_DATA (decl1) = NULL;
10719 if (ctype && !doing_friend && !DECL_STATIC_FUNCTION_P (decl1))
10721 /* We know that this was set up by `grokclassfn'. We do not
10722 wait until `store_parm_decls', since evil parse errors may
10723 never get us to that point. Here we keep the consistency
10724 between `current_class_type' and `current_class_ptr'. */
10725 tree t = DECL_ARGUMENTS (decl1);
10727 gcc_assert (t != NULL_TREE && TREE_CODE (t) == PARM_DECL);
10728 gcc_assert (TREE_CODE (TREE_TYPE (t)) == POINTER_TYPE);
10730 cp_function_chain->x_current_class_ref
10731 = build_indirect_ref (t, NULL);
10732 cp_function_chain->x_current_class_ptr = t;
10734 /* Constructors and destructors need to know whether they're "in
10735 charge" of initializing virtual base classes. */
10736 t = TREE_CHAIN (t);
10737 if (DECL_HAS_IN_CHARGE_PARM_P (decl1))
10739 current_in_charge_parm = t;
10740 t = TREE_CHAIN (t);
10742 if (DECL_HAS_VTT_PARM_P (decl1))
10744 gcc_assert (DECL_NAME (t) == vtt_parm_identifier);
10745 current_vtt_parm = t;
10749 honor_interface = (!DECL_TEMPLATE_INSTANTIATION (decl1)
10750 /* Implicitly-defined methods (like the
10751 destructor for a class in which no destructor
10752 is explicitly declared) must not be defined
10753 until their definition is needed. So, we
10754 ignore interface specifications for
10755 compiler-generated functions. */
10756 && !DECL_ARTIFICIAL (decl1));
10758 if (DECL_INTERFACE_KNOWN (decl1))
10760 tree ctx = decl_function_context (decl1);
10762 if (DECL_NOT_REALLY_EXTERN (decl1))
10763 DECL_EXTERNAL (decl1) = 0;
10765 if (ctx != NULL_TREE && DECL_DECLARED_INLINE_P (ctx)
10766 && TREE_PUBLIC (ctx))
10767 /* This is a function in a local class in an extern inline
10769 comdat_linkage (decl1);
10771 /* If this function belongs to an interface, it is public.
10772 If it belongs to someone else's interface, it is also external.
10773 This only affects inlines and template instantiations. */
10774 else if (!finfo->interface_unknown && honor_interface)
10776 if (DECL_DECLARED_INLINE_P (decl1)
10777 || DECL_TEMPLATE_INSTANTIATION (decl1)
10778 || processing_template_decl)
10780 DECL_EXTERNAL (decl1)
10781 = (finfo->interface_only
10782 || (DECL_DECLARED_INLINE_P (decl1)
10783 && ! flag_implement_inlines
10784 && !DECL_VINDEX (decl1)));
10786 /* For WIN32 we also want to put these in linkonce sections. */
10787 maybe_make_one_only (decl1);
10790 DECL_EXTERNAL (decl1) = 0;
10791 DECL_INTERFACE_KNOWN (decl1) = 1;
10792 /* If this function is in an interface implemented in this file,
10793 make sure that the back end knows to emit this function
10795 if (!DECL_EXTERNAL (decl1))
10796 mark_needed (decl1);
10798 else if (finfo->interface_unknown && finfo->interface_only
10799 && honor_interface)
10801 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
10802 interface, we will have both finfo->interface_unknown and
10803 finfo->interface_only set. In that case, we don't want to
10804 use the normal heuristics because someone will supply a
10805 #pragma implementation elsewhere, and deducing it here would
10806 produce a conflict. */
10807 comdat_linkage (decl1);
10808 DECL_EXTERNAL (decl1) = 0;
10809 DECL_INTERFACE_KNOWN (decl1) = 1;
10810 DECL_DEFER_OUTPUT (decl1) = 1;
10814 /* This is a definition, not a reference.
10815 So clear DECL_EXTERNAL. */
10816 DECL_EXTERNAL (decl1) = 0;
10818 if ((DECL_DECLARED_INLINE_P (decl1)
10819 || DECL_TEMPLATE_INSTANTIATION (decl1))
10820 && ! DECL_INTERFACE_KNOWN (decl1)
10821 /* Don't try to defer nested functions for now. */
10822 && ! decl_function_context (decl1))
10823 DECL_DEFER_OUTPUT (decl1) = 1;
10825 DECL_INTERFACE_KNOWN (decl1) = 1;
10828 /* Determine the ELF visibility attribute for the function. We must not
10829 do this before calling "pushdecl", as we must allow "duplicate_decls"
10830 to merge any attributes appropriately. We also need to wait until
10832 if (!DECL_CLONED_FUNCTION_P (decl1))
10833 determine_visibility (decl1);
10835 begin_scope (sk_function_parms, decl1);
10839 if (DECL_DESTRUCTOR_P (decl1)
10840 || (DECL_CONSTRUCTOR_P (decl1)
10841 && targetm.cxx.cdtor_returns_this ()))
10843 cdtor_label = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
10844 DECL_CONTEXT (cdtor_label) = current_function_decl;
10847 start_fname_decls ();
10849 store_parm_decls (current_function_parms);
10853 /* Like start_preparsed_function, except that instead of a
10854 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
10856 Returns 1 on success. If the DECLARATOR is not suitable for a function
10857 (it defines a datum instead), we return 0, which tells
10858 yyparse to report a parse error. */
10861 start_function (cp_decl_specifier_seq *declspecs,
10862 const cp_declarator *declarator,
10867 decl1 = grokdeclarator (declarator, declspecs, FUNCDEF, 1, &attrs);
10868 /* If the declarator is not suitable for a function definition,
10869 cause a syntax error. */
10870 if (decl1 == NULL_TREE || TREE_CODE (decl1) != FUNCTION_DECL)
10873 if (DECL_MAIN_P (decl1))
10874 /* main must return int. grokfndecl should have corrected it
10875 (and issued a diagnostic) if the user got it wrong. */
10876 gcc_assert (same_type_p (TREE_TYPE (TREE_TYPE (decl1)),
10877 integer_type_node));
10879 start_preparsed_function (decl1, attrs, /*flags=*/SF_DEFAULT);
10884 /* Returns true iff an EH_SPEC_BLOCK should be created in the body of
10888 use_eh_spec_block (tree fn)
10890 return (flag_exceptions && flag_enforce_eh_specs
10891 && !processing_template_decl
10892 && TYPE_RAISES_EXCEPTIONS (TREE_TYPE (fn))
10893 /* We insert the EH_SPEC_BLOCK only in the original
10894 function; then, it is copied automatically to the
10896 && !DECL_CLONED_FUNCTION_P (fn)
10897 /* Implicitly-generated constructors and destructors have
10898 exception specifications. However, those specifications
10899 are the union of the possible exceptions specified by the
10900 constructors/destructors for bases and members, so no
10901 unallowed exception will ever reach this function. By
10902 not creating the EH_SPEC_BLOCK we save a little memory,
10903 and we avoid spurious warnings about unreachable
10905 && !DECL_ARTIFICIAL (fn));
10908 /* Store the parameter declarations into the current function declaration.
10909 This is called after parsing the parameter declarations, before
10910 digesting the body of the function.
10912 Also install to binding contour return value identifier, if any. */
10915 store_parm_decls (tree current_function_parms)
10917 tree fndecl = current_function_decl;
10920 /* This is a chain of any other decls that came in among the parm
10921 declarations. If a parm is declared with enum {foo, bar} x;
10922 then CONST_DECLs for foo and bar are put here. */
10923 tree nonparms = NULL_TREE;
10925 if (current_function_parms)
10927 /* This case is when the function was defined with an ANSI prototype.
10928 The parms already have decls, so we need not do anything here
10929 except record them as in effect
10930 and complain if any redundant old-style parm decls were written. */
10932 tree specparms = current_function_parms;
10935 /* Must clear this because it might contain TYPE_DECLs declared
10937 current_binding_level->names = NULL;
10939 /* If we're doing semantic analysis, then we'll call pushdecl
10940 for each of these. We must do them in reverse order so that
10941 they end in the correct forward order. */
10942 specparms = nreverse (specparms);
10944 for (parm = specparms; parm; parm = next)
10946 next = TREE_CHAIN (parm);
10947 if (TREE_CODE (parm) == PARM_DECL)
10949 if (DECL_NAME (parm) == NULL_TREE
10950 || TREE_CODE (parm) != VOID_TYPE)
10953 error ("parameter %qD declared void", parm);
10957 /* If we find an enum constant or a type tag,
10958 put it aside for the moment. */
10959 TREE_CHAIN (parm) = NULL_TREE;
10960 nonparms = chainon (nonparms, parm);
10964 /* Get the decls in their original chain order and record in the
10965 function. This is all and only the PARM_DECLs that were
10966 pushed into scope by the loop above. */
10967 DECL_ARGUMENTS (fndecl) = getdecls ();
10970 DECL_ARGUMENTS (fndecl) = NULL_TREE;
10972 /* Now store the final chain of decls for the arguments
10973 as the decl-chain of the current lexical scope.
10974 Put the enumerators in as well, at the front so that
10975 DECL_ARGUMENTS is not modified. */
10976 current_binding_level->names = chainon (nonparms, DECL_ARGUMENTS (fndecl));
10978 if (use_eh_spec_block (current_function_decl))
10979 current_eh_spec_block = begin_eh_spec_block ();
10983 /* We have finished doing semantic analysis on DECL, but have not yet
10984 generated RTL for its body. Save away our current state, so that
10985 when we want to generate RTL later we know what to do. */
10988 save_function_data (tree decl)
10990 struct language_function *f;
10992 /* Save the language-specific per-function data so that we can
10993 get it back when we really expand this function. */
10994 gcc_assert (!DECL_PENDING_INLINE_P (decl));
10997 f = GGC_NEW (struct language_function);
10998 memcpy (f, cp_function_chain, sizeof (struct language_function));
10999 DECL_SAVED_FUNCTION_DATA (decl) = f;
11001 /* Clear out the bits we don't need. */
11002 f->base.x_stmt_tree.x_cur_stmt_list = NULL_TREE;
11003 f->bindings = NULL;
11004 f->x_local_names = NULL;
11008 /* Set the return value of the constructor (if present). */
11011 finish_constructor_body (void)
11016 if (targetm.cxx.cdtor_returns_this ())
11018 /* Any return from a constructor will end up here. */
11019 add_stmt (build_stmt (LABEL_EXPR, cdtor_label));
11021 val = DECL_ARGUMENTS (current_function_decl);
11022 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
11023 DECL_RESULT (current_function_decl), val);
11024 /* Return the address of the object. */
11025 exprstmt = build_stmt (RETURN_EXPR, val);
11026 add_stmt (exprstmt);
11030 /* Do all the processing for the beginning of a destructor; set up the
11031 vtable pointers and cleanups for bases and members. */
11034 begin_destructor_body (void)
11036 tree compound_stmt;
11038 /* If the CURRENT_CLASS_TYPE is incomplete, we will have already
11039 issued an error message. We still want to try to process the
11040 body of the function, but initialize_vtbl_ptrs will crash if
11041 TYPE_BINFO is NULL. */
11042 if (COMPLETE_TYPE_P (current_class_type))
11044 compound_stmt = begin_compound_stmt (0);
11045 /* Make all virtual function table pointers in non-virtual base
11046 classes point to CURRENT_CLASS_TYPE's virtual function
11048 initialize_vtbl_ptrs (current_class_ptr);
11049 finish_compound_stmt (compound_stmt);
11051 /* And insert cleanups for our bases and members so that they
11052 will be properly destroyed if we throw. */
11053 push_base_cleanups ();
11057 /* At the end of every destructor we generate code to delete the object if
11058 necessary. Do that now. */
11061 finish_destructor_body (void)
11065 /* Any return from a destructor will end up here; that way all base
11066 and member cleanups will be run when the function returns. */
11067 add_stmt (build_stmt (LABEL_EXPR, cdtor_label));
11069 /* In a virtual destructor, we must call delete. */
11070 if (DECL_VIRTUAL_P (current_function_decl))
11073 tree virtual_size = cxx_sizeof (current_class_type);
11077 At the point of definition of a virtual destructor (including
11078 an implicit definition), non-placement operator delete shall
11079 be looked up in the scope of the destructor's class and if
11080 found shall be accessible and unambiguous. */
11081 exprstmt = build_op_delete_call(DELETE_EXPR, current_class_ptr,
11083 /*global_p=*/false,
11084 /*placement=*/NULL_TREE,
11085 /*alloc_fn=*/NULL_TREE);
11087 if_stmt = begin_if_stmt ();
11088 finish_if_stmt_cond (build2 (BIT_AND_EXPR, integer_type_node,
11089 current_in_charge_parm,
11092 finish_expr_stmt (exprstmt);
11093 finish_then_clause (if_stmt);
11094 finish_if_stmt (if_stmt);
11097 if (targetm.cxx.cdtor_returns_this ())
11101 val = DECL_ARGUMENTS (current_function_decl);
11102 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
11103 DECL_RESULT (current_function_decl), val);
11104 /* Return the address of the object. */
11105 exprstmt = build_stmt (RETURN_EXPR, val);
11106 add_stmt (exprstmt);
11110 /* Do the necessary processing for the beginning of a function body, which
11111 in this case includes member-initializers, but not the catch clauses of
11112 a function-try-block. Currently, this means opening a binding level
11113 for the member-initializers (in a ctor) and member cleanups (in a dtor). */
11116 begin_function_body (void)
11120 if (! FUNCTION_NEEDS_BODY_BLOCK (current_function_decl))
11123 if (processing_template_decl)
11124 /* Do nothing now. */;
11126 /* Always keep the BLOCK node associated with the outermost pair of
11127 curly braces of a function. These are needed for correct
11128 operation of dwarfout.c. */
11129 keep_next_level (true);
11131 stmt = begin_compound_stmt (BCS_FN_BODY);
11133 if (processing_template_decl)
11134 /* Do nothing now. */;
11135 else if (DECL_DESTRUCTOR_P (current_function_decl))
11136 begin_destructor_body ();
11141 /* Do the processing for the end of a function body. Currently, this means
11142 closing out the cleanups for fully-constructed bases and members, and in
11143 the case of the destructor, deleting the object if desired. Again, this
11144 is only meaningful for [cd]tors, since they are the only functions where
11145 there is a significant distinction between the main body and any
11146 function catch clauses. Handling, say, main() return semantics here
11147 would be wrong, as flowing off the end of a function catch clause for
11148 main() would also need to return 0. */
11151 finish_function_body (tree compstmt)
11153 if (compstmt == NULL_TREE)
11156 /* Close the block. */
11157 finish_compound_stmt (compstmt);
11159 if (processing_template_decl)
11160 /* Do nothing now. */;
11161 else if (DECL_CONSTRUCTOR_P (current_function_decl))
11162 finish_constructor_body ();
11163 else if (DECL_DESTRUCTOR_P (current_function_decl))
11164 finish_destructor_body ();
11167 /* Given a function, returns the BLOCK corresponding to the outermost level
11168 of curly braces, skipping the artificial block created for constructor
11172 outer_curly_brace_block (tree fndecl)
11174 tree block = BLOCK_SUBBLOCKS (DECL_INITIAL (fndecl));
11175 if (FUNCTION_NEEDS_BODY_BLOCK (current_function_decl))
11176 /* Skip the artificial function body block. */
11177 block = BLOCK_SUBBLOCKS (block);
11181 /* Finish up a function declaration and compile that function
11182 all the way to assembler language output. The free the storage
11183 for the function definition.
11185 FLAGS is a bitwise or of the following values:
11187 We just finished processing the body of an in-class inline
11188 function definition. (This processing will have taken place
11189 after the class definition is complete.) */
11192 finish_function (int flags)
11194 tree fndecl = current_function_decl;
11195 tree fntype, ctype = NULL_TREE;
11196 int inclass_inline = (flags & 2) != 0;
11199 /* When we get some parse errors, we can end up without a
11200 current_function_decl, so cope. */
11201 if (fndecl == NULL_TREE)
11202 return error_mark_node;
11204 if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fndecl)
11205 && DECL_VIRTUAL_P (fndecl)
11206 && !processing_template_decl)
11208 tree fnclass = DECL_CONTEXT (fndecl);
11209 if (fndecl == CLASSTYPE_KEY_METHOD (fnclass))
11210 keyed_classes = tree_cons (NULL_TREE, fnclass, keyed_classes);
11213 nested = function_depth > 1;
11214 fntype = TREE_TYPE (fndecl);
11216 /* TREE_READONLY (fndecl) = 1;
11217 This caused &foo to be of type ptr-to-const-function
11218 which then got a warning when stored in a ptr-to-function variable. */
11220 gcc_assert (building_stmt_tree ());
11221 /* The current function is being defined, so its DECL_INITIAL should
11222 be set, and unless there's a multiple definition, it should be
11223 error_mark_node. */
11224 gcc_assert (DECL_INITIAL (fndecl) == error_mark_node);
11226 /* For a cloned function, we've already got all the code we need;
11227 there's no need to add any extra bits. */
11228 if (!DECL_CLONED_FUNCTION_P (fndecl))
11230 if (DECL_MAIN_P (current_function_decl))
11234 /* Make it so that `main' always returns 0 by default (or
11237 stmt = finish_return_stmt (integer_one_node);
11239 stmt = finish_return_stmt (integer_zero_node);
11241 /* Hack. We don't want the middle-end to warn that this
11242 return is unreachable, so put the statement on the
11244 #ifdef USE_MAPPED_LOCATION
11245 SET_EXPR_LOCATION (stmt, UNKNOWN_LOCATION);
11247 annotate_with_file_line (stmt, input_filename, 0);
11251 if (use_eh_spec_block (current_function_decl))
11252 finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
11253 (TREE_TYPE (current_function_decl)),
11254 current_eh_spec_block);
11257 /* If we're saving up tree structure, tie off the function now. */
11258 DECL_SAVED_TREE (fndecl) = pop_stmt_list (DECL_SAVED_TREE (fndecl));
11260 finish_fname_decls ();
11262 /* If this function can't throw any exceptions, remember that. */
11263 if (!processing_template_decl
11264 && !cp_function_chain->can_throw
11265 && !flag_non_call_exceptions
11266 && !DECL_REPLACEABLE_P (fndecl))
11267 TREE_NOTHROW (fndecl) = 1;
11269 /* This must come after expand_function_end because cleanups might
11270 have declarations (from inline functions) that need to go into
11271 this function's blocks. */
11273 /* If the current binding level isn't the outermost binding level
11274 for this function, either there is a bug, or we have experienced
11275 syntax errors and the statement tree is malformed. */
11276 if (current_binding_level->kind != sk_function_parms)
11278 /* Make sure we have already experienced errors. */
11279 gcc_assert (errorcount);
11281 /* Throw away the broken statement tree and extra binding
11283 DECL_SAVED_TREE (fndecl) = alloc_stmt_list ();
11285 while (current_binding_level->kind != sk_function_parms)
11287 if (current_binding_level->kind == sk_class)
11288 pop_nested_class ();
11290 poplevel (0, 0, 0);
11293 poplevel (1, 0, 1);
11295 /* Statements should always be full-expressions at the outermost set
11296 of curly braces for a function. */
11297 gcc_assert (stmts_are_full_exprs_p ());
11299 /* Set up the named return value optimization, if we can. Candidate
11300 variables are selected in check_return_value. */
11301 if (current_function_return_value)
11303 tree r = current_function_return_value;
11306 if (r != error_mark_node
11307 /* This is only worth doing for fns that return in memory--and
11308 simpler, since we don't have to worry about promoted modes. */
11309 && aggregate_value_p (TREE_TYPE (TREE_TYPE (fndecl)), fndecl)
11310 /* Only allow this for variables declared in the outer scope of
11311 the function so we know that their lifetime always ends with a
11312 return; see g++.dg/opt/nrv6.C. We could be more flexible if
11313 we were to do this optimization in tree-ssa. */
11314 && (outer = outer_curly_brace_block (fndecl))
11315 && chain_member (r, BLOCK_VARS (outer)))
11316 finalize_nrv (&DECL_SAVED_TREE (fndecl), r, DECL_RESULT (fndecl));
11318 current_function_return_value = NULL_TREE;
11321 /* Remember that we were in class scope. */
11322 if (current_class_name)
11323 ctype = current_class_type;
11325 /* Must mark the RESULT_DECL as being in this function. */
11326 DECL_CONTEXT (DECL_RESULT (fndecl)) = fndecl;
11328 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
11329 to the FUNCTION_DECL node itself. */
11330 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl)) = fndecl;
11332 /* Save away current state, if appropriate. */
11333 if (!processing_template_decl)
11334 save_function_data (fndecl);
11336 /* Complain if there's just no return statement. */
11337 if (warn_return_type
11338 && TREE_CODE (TREE_TYPE (fntype)) != VOID_TYPE
11339 && !dependent_type_p (TREE_TYPE (fntype))
11340 && !current_function_returns_value && !current_function_returns_null
11341 /* Don't complain if we abort or throw. */
11342 && !current_function_returns_abnormally
11343 && !DECL_NAME (DECL_RESULT (fndecl))
11344 /* Normally, with -Wreturn-type, flow will complain. Unless we're an
11345 inline function, as we might never be compiled separately. */
11346 && (DECL_INLINE (fndecl) || processing_template_decl)
11347 /* Structor return values (if any) are set by the compiler. */
11348 && !DECL_CONSTRUCTOR_P (fndecl)
11349 && !DECL_DESTRUCTOR_P (fndecl))
11350 warning (OPT_Wreturn_type, "no return statement in function returning non-void");
11352 /* Store the end of the function, so that we get good line number
11353 info for the epilogue. */
11354 cfun->function_end_locus = input_location;
11356 /* Genericize before inlining. */
11357 if (!processing_template_decl)
11359 struct language_function *f = DECL_SAVED_FUNCTION_DATA (fndecl);
11360 cp_genericize (fndecl);
11361 /* Clear out the bits we don't need. */
11362 f->x_current_class_ptr = NULL;
11363 f->x_current_class_ref = NULL;
11364 f->x_eh_spec_block = NULL;
11365 f->x_in_charge_parm = NULL;
11366 f->x_vtt_parm = NULL;
11367 f->x_return_value = NULL;
11368 f->bindings = NULL;
11369 f->extern_decl_map = NULL;
11371 /* Handle attribute((warn_unused_result)). Relies on gimple input. */
11372 c_warn_unused_result (&DECL_SAVED_TREE (fndecl));
11374 /* Clear out the bits we don't need. */
11375 local_names = NULL;
11377 /* We're leaving the context of this function, so zap cfun. It's still in
11378 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
11380 current_function_decl = NULL;
11382 /* If this is an in-class inline definition, we may have to pop the
11383 bindings for the template parameters that we added in
11384 maybe_begin_member_template_processing when start_function was
11386 if (inclass_inline)
11387 maybe_end_member_template_processing ();
11389 /* Leave the scope of the class. */
11391 pop_nested_class ();
11397 /* Let the error reporting routines know that we're outside a
11398 function. For a nested function, this value is used in
11399 cxx_pop_function_context and then reset via pop_function_context. */
11400 current_function_decl = NULL_TREE;
11405 /* Create the FUNCTION_DECL for a function definition.
11406 DECLSPECS and DECLARATOR are the parts of the declaration;
11407 they describe the return type and the name of the function,
11408 but twisted together in a fashion that parallels the syntax of C.
11410 This function creates a binding context for the function body
11411 as well as setting up the FUNCTION_DECL in current_function_decl.
11413 Returns a FUNCTION_DECL on success.
11415 If the DECLARATOR is not suitable for a function (it defines a datum
11416 instead), we return 0, which tells yyparse to report a parse error.
11418 May return void_type_node indicating that this method is actually
11419 a friend. See grokfield for more details.
11421 Came here with a `.pushlevel' .
11423 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
11424 CHANGES TO CODE IN `grokfield'. */
11427 start_method (cp_decl_specifier_seq *declspecs,
11428 const cp_declarator *declarator, tree attrlist)
11430 tree fndecl = grokdeclarator (declarator, declspecs, MEMFUNCDEF, 0,
11433 if (fndecl == error_mark_node)
11434 return error_mark_node;
11436 if (fndecl == NULL || TREE_CODE (fndecl) != FUNCTION_DECL)
11438 error ("invalid member function declaration");
11439 return error_mark_node;
11443 cplus_decl_attributes (&fndecl, attrlist, 0);
11445 /* Pass friends other than inline friend functions back. */
11446 if (fndecl == void_type_node)
11449 if (DECL_IN_AGGR_P (fndecl))
11451 if (DECL_CONTEXT (fndecl)
11452 && TREE_CODE (DECL_CONTEXT (fndecl)) != NAMESPACE_DECL)
11453 error ("%qD is already defined in class %qT", fndecl,
11454 DECL_CONTEXT (fndecl));
11455 return error_mark_node;
11458 check_template_shadow (fndecl);
11460 DECL_DECLARED_INLINE_P (fndecl) = 1;
11461 if (flag_default_inline)
11462 DECL_INLINE (fndecl) = 1;
11464 /* We process method specializations in finish_struct_1. */
11465 if (processing_template_decl && !DECL_TEMPLATE_SPECIALIZATION (fndecl))
11467 fndecl = push_template_decl (fndecl);
11468 if (fndecl == error_mark_node)
11472 if (! DECL_FRIEND_P (fndecl))
11474 if (TREE_CHAIN (fndecl))
11476 fndecl = copy_node (fndecl);
11477 TREE_CHAIN (fndecl) = NULL_TREE;
11481 finish_decl (fndecl, NULL_TREE, NULL_TREE);
11483 /* Make a place for the parms. */
11484 begin_scope (sk_function_parms, fndecl);
11486 DECL_IN_AGGR_P (fndecl) = 1;
11490 /* Go through the motions of finishing a function definition.
11491 We don't compile this method until after the whole class has
11494 FINISH_METHOD must return something that looks as though it
11495 came from GROKFIELD (since we are defining a method, after all).
11497 This is called after parsing the body of the function definition.
11498 STMTS is the chain of statements that makes up the function body.
11500 DECL is the ..._DECL that `start_method' provided. */
11503 finish_method (tree decl)
11505 tree fndecl = decl;
11510 if (decl == void_type_node)
11513 old_initial = DECL_INITIAL (fndecl);
11515 /* Undo the level for the parms (from start_method).
11516 This is like poplevel, but it causes nothing to be
11517 saved. Saving information here confuses symbol-table
11518 output routines. Besides, this information will
11519 be correctly output when this method is actually
11522 /* Clear out the meanings of the local variables of this level;
11523 also record in each decl which block it belongs to. */
11525 for (link = current_binding_level->names; link; link = TREE_CHAIN (link))
11527 if (DECL_NAME (link) != NULL_TREE)
11528 pop_binding (DECL_NAME (link), link);
11529 gcc_assert (TREE_CODE (link) != FUNCTION_DECL);
11530 DECL_CONTEXT (link) = NULL_TREE;
11533 poplevel (0, 0, 0);
11535 DECL_INITIAL (fndecl) = old_initial;
11537 /* We used to check if the context of FNDECL was different from
11538 current_class_type as another way to get inside here. This didn't work
11539 for String.cc in libg++. */
11540 if (DECL_FRIEND_P (fndecl))
11542 VEC_safe_push (tree, gc, CLASSTYPE_INLINE_FRIENDS (current_class_type),
11544 decl = void_type_node;
11551 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
11552 we can lay it out later, when and if its type becomes complete. */
11555 maybe_register_incomplete_var (tree var)
11557 gcc_assert (TREE_CODE (var) == VAR_DECL);
11559 /* Keep track of variables with incomplete types. */
11560 if (!processing_template_decl && TREE_TYPE (var) != error_mark_node
11561 && DECL_EXTERNAL (var))
11563 tree inner_type = TREE_TYPE (var);
11565 while (TREE_CODE (inner_type) == ARRAY_TYPE)
11566 inner_type = TREE_TYPE (inner_type);
11567 inner_type = TYPE_MAIN_VARIANT (inner_type);
11569 if ((!COMPLETE_TYPE_P (inner_type) && CLASS_TYPE_P (inner_type))
11570 /* RTTI TD entries are created while defining the type_info. */
11571 || (TYPE_LANG_SPECIFIC (inner_type)
11572 && TYPE_BEING_DEFINED (inner_type)))
11573 incomplete_vars = tree_cons (inner_type, var, incomplete_vars);
11577 /* Called when a class type (given by TYPE) is defined. If there are
11578 any existing VAR_DECLs whose type hsa been completed by this
11579 declaration, update them now. */
11582 complete_vars (tree type)
11584 tree *list = &incomplete_vars;
11586 gcc_assert (CLASS_TYPE_P (type));
11589 if (same_type_p (type, TREE_PURPOSE (*list)))
11591 tree var = TREE_VALUE (*list);
11592 tree type = TREE_TYPE (var);
11593 /* Complete the type of the variable. The VAR_DECL itself
11594 will be laid out in expand_expr. */
11595 complete_type (type);
11596 cp_apply_type_quals_to_decl (cp_type_quals (type), var);
11597 /* Remove this entry from the list. */
11598 *list = TREE_CHAIN (*list);
11601 list = &TREE_CHAIN (*list);
11604 /* Check for pending declarations which may have abstract type. */
11605 complete_type_check_abstract (type);
11608 /* If DECL is of a type which needs a cleanup, build that cleanup
11612 cxx_maybe_build_cleanup (tree decl)
11614 tree type = TREE_TYPE (decl);
11616 if (type != error_mark_node && TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
11618 int flags = LOOKUP_NORMAL|LOOKUP_DESTRUCTOR;
11620 bool has_vbases = (TREE_CODE (type) == RECORD_TYPE
11621 && CLASSTYPE_VBASECLASSES (type));
11623 if (TREE_CODE (type) == ARRAY_TYPE)
11627 cxx_mark_addressable (decl);
11628 rval = build_unary_op (ADDR_EXPR, decl, 0);
11631 /* Optimize for space over speed here. */
11632 if (!has_vbases || flag_expensive_optimizations)
11633 flags |= LOOKUP_NONVIRTUAL;
11635 rval = build_delete (TREE_TYPE (rval), rval,
11636 sfk_complete_destructor, flags, 0);
11643 /* When a stmt has been parsed, this function is called. */
11650 /* DECL was originally constructed as a non-static member function,
11651 but turned out to be static. Update it accordingly. */
11654 revert_static_member_fn (tree decl)
11657 tree function = TREE_TYPE (decl);
11658 tree args = TYPE_ARG_TYPES (function);
11660 if (cp_type_quals (TREE_TYPE (TREE_VALUE (args)))
11661 != TYPE_UNQUALIFIED)
11662 error ("static member function %q#D declared with type qualifiers", decl);
11664 args = TREE_CHAIN (args);
11665 tmp = build_function_type (TREE_TYPE (function), args);
11666 tmp = build_qualified_type (tmp, cp_type_quals (function));
11667 tmp = build_exception_variant (tmp,
11668 TYPE_RAISES_EXCEPTIONS (function));
11669 TREE_TYPE (decl) = tmp;
11670 if (DECL_ARGUMENTS (decl))
11671 DECL_ARGUMENTS (decl) = TREE_CHAIN (DECL_ARGUMENTS (decl));
11672 DECL_STATIC_FUNCTION_P (decl) = 1;
11675 /* Initialize the variables used during compilation of a C++
11679 cxx_push_function_context (struct function * f)
11681 struct language_function *p = GGC_CNEW (struct language_function);
11684 /* Whenever we start a new function, we destroy temporaries in the
11686 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
11692 if (DECL_SAVED_FUNCTION_DATA (fn))
11694 /* If we already parsed this function, and we're just expanding it
11695 now, restore saved state. */
11696 *cp_function_chain = *DECL_SAVED_FUNCTION_DATA (fn);
11698 /* We don't need the saved data anymore. Unless this is an inline
11699 function; we need the named return value info for
11700 declare_return_variable. */
11701 if (! DECL_INLINE (fn))
11702 DECL_SAVED_FUNCTION_DATA (fn) = NULL;
11707 /* Free the language-specific parts of F, now that we've finished
11708 compiling the function. */
11711 cxx_pop_function_context (struct function * f)
11716 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
11717 one of the language-independent trees. */
11719 enum cp_tree_node_structure_enum
11720 cp_tree_node_structure (union lang_tree_node * t)
11722 switch (TREE_CODE (&t->generic))
11724 case DEFAULT_ARG: return TS_CP_DEFAULT_ARG;
11725 case IDENTIFIER_NODE: return TS_CP_IDENTIFIER;
11726 case OVERLOAD: return TS_CP_OVERLOAD;
11727 case TEMPLATE_PARM_INDEX: return TS_CP_TPI;
11728 case TINST_LEVEL: return TS_CP_TINST_LEVEL;
11729 case PTRMEM_CST: return TS_CP_PTRMEM;
11730 case BASELINK: return TS_CP_BASELINK;
11731 case STATIC_ASSERT: return TS_CP_STATIC_ASSERT;
11732 case ARGUMENT_PACK_SELECT: return TS_CP_ARGUMENT_PACK_SELECT;
11733 default: return TS_CP_GENERIC;
11737 /* Build the void_list_node (void_type_node having been created). */
11739 build_void_list_node (void)
11741 tree t = build_tree_list (NULL_TREE, void_type_node);
11746 cp_missing_noreturn_ok_p (tree decl)
11748 /* A missing noreturn is ok for the `main' function. */
11749 return DECL_MAIN_P (decl);
11752 /* Return the COMDAT group into which DECL should be placed. */
11755 cxx_comdat_group (tree decl)
11759 /* Virtual tables, construction virtual tables, and virtual table
11760 tables all go in a single COMDAT group, named after the primary
11762 if (TREE_CODE (decl) == VAR_DECL && DECL_VTABLE_OR_VTT_P (decl))
11763 name = DECL_ASSEMBLER_NAME (CLASSTYPE_VTABLES (DECL_CONTEXT (decl)));
11764 /* For all other DECLs, the COMDAT group is the mangled name of the
11765 declaration itself. */
11768 while (DECL_THUNK_P (decl))
11770 /* If TARGET_USE_LOCAL_THUNK_ALIAS_P, use_thunk puts the thunk
11771 into the same section as the target function. In that case
11772 we must return target's name. */
11773 tree target = THUNK_TARGET (decl);
11774 if (TARGET_USE_LOCAL_THUNK_ALIAS_P (target)
11775 && DECL_SECTION_NAME (target) != NULL
11776 && DECL_ONE_ONLY (target))
11781 name = DECL_ASSEMBLER_NAME (decl);
11784 return IDENTIFIER_POINTER (name);
11787 #include "gt-cp-decl.h"