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";
2153 else if (TREE_CODE (newdecl) == VAR_DECL
2154 && DECL_THREAD_LOCAL_P (newdecl) != DECL_THREAD_LOCAL_P (olddecl)
2155 && (! DECL_LANG_SPECIFIC (olddecl)
2156 || ! CP_DECL_THREADPRIVATE_P (olddecl)
2157 || DECL_THREAD_LOCAL_P (newdecl)))
2159 /* Only variables can be thread-local, and all declarations must
2160 agree on this property. */
2161 if (DECL_THREAD_LOCAL_P (newdecl))
2162 return "thread-local declaration of %q#D follows "
2163 "non-thread-local declaration";
2165 return "non-thread-local declaration of %q#D follows "
2166 "thread-local declaration";
2168 else if (toplevel_bindings_p () || DECL_NAMESPACE_SCOPE_P (newdecl))
2170 /* Objects declared at top level: */
2171 /* If at least one is a reference, it's ok. */
2172 if (DECL_EXTERNAL (newdecl) || DECL_EXTERNAL (olddecl))
2174 /* Reject two definitions. */
2175 return "redefinition of %q#D";
2179 /* Objects declared with block scope: */
2180 /* Reject two definitions, and reject a definition
2181 together with an external reference. */
2182 if (!(DECL_EXTERNAL (newdecl) && DECL_EXTERNAL (olddecl)))
2183 return "redeclaration of %q#D";
2188 /* Hash and equality functions for the named_label table. */
2191 named_label_entry_hash (const void *data)
2193 const struct named_label_entry *ent = (const struct named_label_entry *) data;
2194 return DECL_UID (ent->label_decl);
2198 named_label_entry_eq (const void *a, const void *b)
2200 const struct named_label_entry *ent_a = (const struct named_label_entry *) a;
2201 const struct named_label_entry *ent_b = (const struct named_label_entry *) b;
2202 return ent_a->label_decl == ent_b->label_decl;
2205 /* Create a new label, named ID. */
2208 make_label_decl (tree id, int local_p)
2210 struct named_label_entry *ent;
2214 decl = build_decl (LABEL_DECL, id, void_type_node);
2216 DECL_CONTEXT (decl) = current_function_decl;
2217 DECL_MODE (decl) = VOIDmode;
2218 C_DECLARED_LABEL_FLAG (decl) = local_p;
2220 /* Say where one reference is to the label, for the sake of the
2221 error if it is not defined. */
2222 DECL_SOURCE_LOCATION (decl) = input_location;
2224 /* Record the fact that this identifier is bound to this label. */
2225 SET_IDENTIFIER_LABEL_VALUE (id, decl);
2227 /* Create the label htab for the function on demand. */
2229 named_labels = htab_create_ggc (13, named_label_entry_hash,
2230 named_label_entry_eq, NULL);
2232 /* Record this label on the list of labels used in this function.
2233 We do this before calling make_label_decl so that we get the
2234 IDENTIFIER_LABEL_VALUE before the new label is declared. */
2235 ent = GGC_CNEW (struct named_label_entry);
2236 ent->label_decl = decl;
2238 slot = htab_find_slot (named_labels, ent, INSERT);
2239 gcc_assert (*slot == NULL);
2245 /* Look for a label named ID in the current function. If one cannot
2246 be found, create one. (We keep track of used, but undefined,
2247 labels, and complain about them at the end of a function.) */
2250 lookup_label (tree id)
2254 timevar_push (TV_NAME_LOOKUP);
2255 /* You can't use labels at global scope. */
2256 if (current_function_decl == NULL_TREE)
2258 error ("label %qE referenced outside of any function", id);
2259 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, NULL_TREE);
2262 /* See if we've already got this label. */
2263 decl = IDENTIFIER_LABEL_VALUE (id);
2264 if (decl != NULL_TREE && DECL_CONTEXT (decl) == current_function_decl)
2265 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2267 decl = make_label_decl (id, /*local_p=*/0);
2268 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2271 /* Declare a local label named ID. */
2274 declare_local_label (tree id)
2278 /* Add a new entry to the SHADOWED_LABELS list so that when we leave
2279 this scope we can restore the old value of IDENTIFIER_TYPE_VALUE. */
2280 shadow = tree_cons (IDENTIFIER_LABEL_VALUE (id), NULL_TREE,
2281 current_binding_level->shadowed_labels);
2282 current_binding_level->shadowed_labels = shadow;
2284 decl = make_label_decl (id, /*local_p=*/1);
2285 TREE_VALUE (shadow) = decl;
2290 /* Returns nonzero if it is ill-formed to jump past the declaration of
2291 DECL. Returns 2 if it's also a real problem. */
2294 decl_jump_unsafe (tree decl)
2296 if (TREE_CODE (decl) != VAR_DECL || TREE_STATIC (decl)
2297 || TREE_TYPE (decl) == error_mark_node)
2300 if (TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl))
2301 || DECL_NONTRIVIALLY_INITIALIZED_P (decl))
2304 if (pod_type_p (TREE_TYPE (decl)))
2307 /* The POD stuff is just pedantry; why should it matter if the class
2308 contains a field of pointer to member type? */
2312 /* A subroutine of check_previous_goto_1 to identify a branch to the user. */
2315 identify_goto (tree decl, const location_t *locus)
2318 pedwarn ("jump to label %qD", decl);
2320 pedwarn ("jump to case label");
2322 pedwarn ("%H from here", locus);
2325 /* Check that a single previously seen jump to a newly defined label
2326 is OK. DECL is the LABEL_DECL or 0; LEVEL is the binding_level for
2327 the jump context; NAMES are the names in scope in LEVEL at the jump
2328 context; LOCUS is the source position of the jump or 0. Returns
2329 true if all is well. */
2332 check_previous_goto_1 (tree decl, struct cp_binding_level* level, tree names,
2333 bool exited_omp, const location_t *locus)
2335 struct cp_binding_level *b;
2336 bool identified = false, saw_eh = false, saw_omp = false;
2340 identify_goto (decl, locus);
2341 error (" exits OpenMP structured block");
2342 identified = saw_omp = true;
2345 for (b = current_binding_level; b ; b = b->level_chain)
2347 tree new_decls, old_decls = (b == level ? names : NULL_TREE);
2349 for (new_decls = b->names; new_decls != old_decls;
2350 new_decls = TREE_CHAIN (new_decls))
2352 int problem = decl_jump_unsafe (new_decls);
2358 identify_goto (decl, locus);
2362 error (" crosses initialization of %q+#D", new_decls);
2364 pedwarn (" enters scope of non-POD %q+#D", new_decls);
2369 if ((b->kind == sk_try || b->kind == sk_catch) && !saw_eh)
2373 identify_goto (decl, locus);
2376 if (b->kind == sk_try)
2377 error (" enters try block");
2379 error (" enters catch block");
2382 if (b->kind == sk_omp && !saw_omp)
2386 identify_goto (decl, locus);
2389 error (" enters OpenMP structured block");
2398 check_previous_goto (tree decl, struct named_label_use_entry *use)
2400 check_previous_goto_1 (decl, use->binding_level,
2401 use->names_in_scope, use->in_omp_scope,
2402 &use->o_goto_locus);
2406 check_switch_goto (struct cp_binding_level* level)
2408 return check_previous_goto_1 (NULL_TREE, level, level->names, false, NULL);
2411 /* Check that a new jump to a label DECL is OK. Called by
2412 finish_goto_stmt. */
2415 check_goto (tree decl)
2417 struct named_label_entry *ent, dummy;
2418 bool saw_catch = false, identified = false;
2421 /* We can't know where a computed goto is jumping.
2422 So we assume that it's OK. */
2423 if (TREE_CODE (decl) != LABEL_DECL)
2426 /* We didn't record any information about this label when we created it,
2427 and there's not much point since it's trivial to analyze as a return. */
2428 if (decl == cdtor_label)
2431 dummy.label_decl = decl;
2432 ent = (struct named_label_entry *) htab_find (named_labels, &dummy);
2433 gcc_assert (ent != NULL);
2435 /* If the label hasn't been defined yet, defer checking. */
2436 if (! DECL_INITIAL (decl))
2438 struct named_label_use_entry *new_use;
2440 /* Don't bother creating another use if the last goto had the
2441 same data, and will therefore create the same set of errors. */
2443 && ent->uses->names_in_scope == current_binding_level->names)
2446 new_use = GGC_NEW (struct named_label_use_entry);
2447 new_use->binding_level = current_binding_level;
2448 new_use->names_in_scope = current_binding_level->names;
2449 new_use->o_goto_locus = input_location;
2450 new_use->in_omp_scope = false;
2452 new_use->next = ent->uses;
2453 ent->uses = new_use;
2457 if (ent->in_try_scope || ent->in_catch_scope
2458 || ent->in_omp_scope || ent->bad_decls)
2460 pedwarn ("jump to label %q+D", decl);
2461 pedwarn (" from here");
2465 for (bad = ent->bad_decls; bad; bad = TREE_CHAIN (bad))
2467 tree b = TREE_VALUE (bad);
2468 int u = decl_jump_unsafe (b);
2470 if (u > 1 && DECL_ARTIFICIAL (b))
2472 /* Can't skip init of __exception_info. */
2473 error ("%J enters catch block", b);
2477 error (" skips initialization of %q+#D", b);
2479 pedwarn (" enters scope of non-POD %q+#D", b);
2482 if (ent->in_try_scope)
2483 error (" enters try block");
2484 else if (ent->in_catch_scope && !saw_catch)
2485 error (" enters catch block");
2487 if (ent->in_omp_scope)
2488 error (" enters OpenMP structured block");
2489 else if (flag_openmp)
2491 struct cp_binding_level *b;
2492 for (b = current_binding_level; b ; b = b->level_chain)
2494 if (b == ent->binding_level)
2496 if (b->kind == sk_omp)
2500 pedwarn ("jump to label %q+D", decl);
2501 pedwarn (" from here");
2504 error (" exits OpenMP structured block");
2511 /* Check that a return is ok wrt OpenMP structured blocks.
2512 Called by finish_return_stmt. Returns true if all is well. */
2515 check_omp_return (void)
2517 struct cp_binding_level *b;
2518 for (b = current_binding_level; b ; b = b->level_chain)
2519 if (b->kind == sk_omp)
2521 error ("invalid exit from OpenMP structured block");
2527 /* Define a label, specifying the location in the source file.
2528 Return the LABEL_DECL node for the label. */
2531 define_label (location_t location, tree name)
2533 struct named_label_entry *ent, dummy;
2534 struct cp_binding_level *p;
2537 timevar_push (TV_NAME_LOOKUP);
2539 decl = lookup_label (name);
2541 dummy.label_decl = decl;
2542 ent = (struct named_label_entry *) htab_find (named_labels, &dummy);
2543 gcc_assert (ent != NULL);
2545 /* After labels, make any new cleanups in the function go into their
2546 own new (temporary) binding contour. */
2547 for (p = current_binding_level;
2548 p->kind != sk_function_parms;
2550 p->more_cleanups_ok = 0;
2552 if (name == get_identifier ("wchar_t"))
2553 pedwarn ("label named wchar_t");
2555 if (DECL_INITIAL (decl) != NULL_TREE)
2557 error ("duplicate label %qD", decl);
2558 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
2562 struct named_label_use_entry *use;
2564 /* Mark label as having been defined. */
2565 DECL_INITIAL (decl) = error_mark_node;
2566 /* Say where in the source. */
2567 DECL_SOURCE_LOCATION (decl) = location;
2569 ent->binding_level = current_binding_level;
2570 ent->names_in_scope = current_binding_level->names;
2572 for (use = ent->uses; use ; use = use->next)
2573 check_previous_goto (decl, use);
2577 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2582 struct cp_binding_level *level;
2583 struct cp_switch *next;
2584 /* The SWITCH_STMT being built. */
2586 /* A splay-tree mapping the low element of a case range to the high
2587 element, or NULL_TREE if there is no high element. Used to
2588 determine whether or not a new case label duplicates an old case
2589 label. We need a tree, rather than simply a hash table, because
2590 of the GNU case range extension. */
2594 /* A stack of the currently active switch statements. The innermost
2595 switch statement is on the top of the stack. There is no need to
2596 mark the stack for garbage collection because it is only active
2597 during the processing of the body of a function, and we never
2598 collect at that point. */
2600 static struct cp_switch *switch_stack;
2602 /* Called right after a switch-statement condition is parsed.
2603 SWITCH_STMT is the switch statement being parsed. */
2606 push_switch (tree switch_stmt)
2608 struct cp_switch *p = XNEW (struct cp_switch);
2609 p->level = current_binding_level;
2610 p->next = switch_stack;
2611 p->switch_stmt = switch_stmt;
2612 p->cases = splay_tree_new (case_compare, NULL, NULL);
2619 struct cp_switch *cs = switch_stack;
2620 location_t switch_location;
2622 /* Emit warnings as needed. */
2623 if (EXPR_HAS_LOCATION (cs->switch_stmt))
2624 switch_location = EXPR_LOCATION (cs->switch_stmt);
2626 switch_location = input_location;
2627 if (!processing_template_decl)
2628 c_do_switch_warnings (cs->cases, switch_location,
2629 SWITCH_STMT_TYPE (cs->switch_stmt),
2630 SWITCH_STMT_COND (cs->switch_stmt));
2632 splay_tree_delete (cs->cases);
2633 switch_stack = switch_stack->next;
2637 /* Note that we've seen a definition of a case label, and complain if this
2638 is a bad place for one. */
2641 finish_case_label (tree low_value, tree high_value)
2644 struct cp_binding_level *p;
2646 if (processing_template_decl)
2650 /* For templates, just add the case label; we'll do semantic
2651 analysis at instantiation-time. */
2652 label = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
2653 return add_stmt (build_case_label (low_value, high_value, label));
2656 /* Find the condition on which this switch statement depends. */
2657 cond = SWITCH_STMT_COND (switch_stack->switch_stmt);
2658 if (cond && TREE_CODE (cond) == TREE_LIST)
2659 cond = TREE_VALUE (cond);
2661 if (!check_switch_goto (switch_stack->level))
2662 return error_mark_node;
2664 r = c_add_case_label (switch_stack->cases, cond, TREE_TYPE (cond),
2665 low_value, high_value);
2667 /* After labels, make any new cleanups in the function go into their
2668 own new (temporary) binding contour. */
2669 for (p = current_binding_level;
2670 p->kind != sk_function_parms;
2672 p->more_cleanups_ok = 0;
2677 /* Hash a TYPENAME_TYPE. K is really of type `tree'. */
2680 typename_hash (const void* k)
2685 hash = (htab_hash_pointer (TYPE_CONTEXT (t))
2686 ^ htab_hash_pointer (DECL_NAME (TYPE_NAME (t))));
2691 typedef struct typename_info {
2699 /* Compare two TYPENAME_TYPEs. K1 is really of type `tree', K2 is
2700 really of type `typename_info*' */
2703 typename_compare (const void * k1, const void * k2)
2706 const typename_info *t2;
2709 t2 = (const typename_info *) k2;
2711 return (DECL_NAME (TYPE_NAME (t1)) == t2->name
2712 && TYPE_CONTEXT (t1) == t2->scope
2713 && TYPENAME_TYPE_FULLNAME (t1) == t2->template_id
2714 && TYPENAME_IS_ENUM_P (t1) == t2->enum_p
2715 && TYPENAME_IS_CLASS_P (t1) == t2->class_p);
2718 /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
2719 the type of `T', NAME is the IDENTIFIER_NODE for `t'.
2721 Returns the new TYPENAME_TYPE. */
2723 static GTY ((param_is (union tree_node))) htab_t typename_htab;
2726 build_typename_type (tree context, tree name, tree fullname,
2727 enum tag_types tag_type)
2735 if (typename_htab == NULL)
2736 typename_htab = htab_create_ggc (61, &typename_hash,
2737 &typename_compare, NULL);
2739 ti.scope = FROB_CONTEXT (context);
2741 ti.template_id = fullname;
2742 ti.enum_p = tag_type == enum_type;
2743 ti.class_p = (tag_type == class_type
2744 || tag_type == record_type
2745 || tag_type == union_type);
2746 hash = (htab_hash_pointer (ti.scope)
2747 ^ htab_hash_pointer (ti.name));
2749 /* See if we already have this type. */
2750 e = htab_find_slot_with_hash (typename_htab, &ti, hash, INSERT);
2755 /* Build the TYPENAME_TYPE. */
2756 t = make_aggr_type (TYPENAME_TYPE);
2757 TYPE_CONTEXT (t) = ti.scope;
2758 TYPENAME_TYPE_FULLNAME (t) = ti.template_id;
2759 TYPENAME_IS_ENUM_P (t) = ti.enum_p;
2760 TYPENAME_IS_CLASS_P (t) = ti.class_p;
2762 /* Build the corresponding TYPE_DECL. */
2763 d = build_decl (TYPE_DECL, name, t);
2764 TYPE_NAME (TREE_TYPE (d)) = d;
2765 TYPE_STUB_DECL (TREE_TYPE (d)) = d;
2766 DECL_CONTEXT (d) = FROB_CONTEXT (context);
2767 DECL_ARTIFICIAL (d) = 1;
2769 /* Store it in the hash table. */
2772 /* TYPENAME_TYPEs must always be compared structurally, because
2773 they may or may not resolve down to another type depending on
2774 the currently open classes. */
2775 SET_TYPE_STRUCTURAL_EQUALITY (t);
2781 /* Resolve `typename CONTEXT::NAME'. TAG_TYPE indicates the tag
2782 provided to name the type. Returns an appropriate type, unless an
2783 error occurs, in which case error_mark_node is returned. If we
2784 locate a non-artificial TYPE_DECL and TF_KEEP_TYPE_DECL is set, we
2785 return that, rather than the _TYPE it corresponds to, in other
2786 cases we look through the type decl. If TF_ERROR is set, complain
2787 about errors, otherwise be quiet. */
2790 make_typename_type (tree context, tree name, enum tag_types tag_type,
2791 tsubst_flags_t complain)
2797 if (name == error_mark_node
2798 || context == NULL_TREE
2799 || context == error_mark_node)
2800 return error_mark_node;
2804 if (!(TYPE_LANG_SPECIFIC (name)
2805 && (CLASSTYPE_IS_TEMPLATE (name)
2806 || CLASSTYPE_USE_TEMPLATE (name))))
2807 name = TYPE_IDENTIFIER (name);
2809 /* Create a TEMPLATE_ID_EXPR for the type. */
2810 name = build_nt (TEMPLATE_ID_EXPR,
2811 CLASSTYPE_TI_TEMPLATE (name),
2812 CLASSTYPE_TI_ARGS (name));
2814 else if (TREE_CODE (name) == TYPE_DECL)
2815 name = DECL_NAME (name);
2819 if (TREE_CODE (name) == TEMPLATE_ID_EXPR)
2821 name = TREE_OPERAND (name, 0);
2822 if (TREE_CODE (name) == TEMPLATE_DECL)
2823 name = TREE_OPERAND (fullname, 0) = DECL_NAME (name);
2824 else if (TREE_CODE (name) == OVERLOAD)
2826 error ("%qD is not a type", name);
2827 return error_mark_node;
2830 if (TREE_CODE (name) == TEMPLATE_DECL)
2832 error ("%qD used without template parameters", name);
2833 return error_mark_node;
2835 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
2836 gcc_assert (TYPE_P (context));
2838 /* When the CONTEXT is a dependent type, NAME could refer to a
2839 dependent base class of CONTEXT. So we cannot peek inside it,
2840 even if CONTEXT is a currently open scope. */
2841 if (dependent_type_p (context))
2842 return build_typename_type (context, name, fullname, tag_type);
2844 if (!IS_AGGR_TYPE (context))
2846 if (complain & tf_error)
2847 error ("%q#T is not a class", context);
2848 return error_mark_node;
2851 want_template = TREE_CODE (fullname) == TEMPLATE_ID_EXPR;
2853 /* We should only set WANT_TYPE when we're a nested typename type.
2854 Then we can give better diagnostics if we find a non-type. */
2855 t = lookup_field (context, name, 0, /*want_type=*/true);
2858 if (complain & tf_error)
2859 error (want_template ? "no class template named %q#T in %q#T"
2860 : "no type named %q#T in %q#T", name, context);
2861 return error_mark_node;
2864 if (want_template && !DECL_CLASS_TEMPLATE_P (t))
2866 if (complain & tf_error)
2867 error ("%<typename %T::%D%> names %q#T, which is not a class template",
2869 return error_mark_node;
2871 if (!want_template && TREE_CODE (t) != TYPE_DECL)
2873 if (complain & tf_error)
2874 error ("%<typename %T::%D%> names %q#T, which is not a type",
2876 return error_mark_node;
2879 if (complain & tf_error)
2880 perform_or_defer_access_check (TYPE_BINFO (context), t, t);
2883 return lookup_template_class (t, TREE_OPERAND (fullname, 1),
2885 /*entering_scope=*/0,
2886 tf_warning_or_error | tf_user);
2888 if (DECL_ARTIFICIAL (t) || !(complain & tf_keep_type_decl))
2894 /* Resolve `CONTEXT::template NAME'. Returns a TEMPLATE_DECL if the name
2895 can be resolved or an UNBOUND_CLASS_TEMPLATE, unless an error occurs,
2896 in which case error_mark_node is returned.
2898 If PARM_LIST is non-NULL, also make sure that the template parameter
2899 list of TEMPLATE_DECL matches.
2901 If COMPLAIN zero, don't complain about any errors that occur. */
2904 make_unbound_class_template (tree context, tree name, tree parm_list,
2905 tsubst_flags_t complain)
2911 name = TYPE_IDENTIFIER (name);
2912 else if (DECL_P (name))
2913 name = DECL_NAME (name);
2914 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
2916 if (!dependent_type_p (context)
2917 || currently_open_class (context))
2919 tree tmpl = NULL_TREE;
2921 if (IS_AGGR_TYPE (context))
2922 tmpl = lookup_field (context, name, 0, false);
2924 if (!tmpl || !DECL_CLASS_TEMPLATE_P (tmpl))
2926 if (complain & tf_error)
2927 error ("no class template named %q#T in %q#T", name, context);
2928 return error_mark_node;
2932 && !comp_template_parms (DECL_TEMPLATE_PARMS (tmpl), parm_list))
2934 if (complain & tf_error)
2936 error ("template parameters do not match template");
2937 error ("%q+D declared here", tmpl);
2939 return error_mark_node;
2942 if (complain & tf_error)
2943 perform_or_defer_access_check (TYPE_BINFO (context), tmpl, tmpl);
2948 /* Build the UNBOUND_CLASS_TEMPLATE. */
2949 t = make_aggr_type (UNBOUND_CLASS_TEMPLATE);
2950 TYPE_CONTEXT (t) = FROB_CONTEXT (context);
2951 TREE_TYPE (t) = NULL_TREE;
2952 SET_TYPE_STRUCTURAL_EQUALITY (t);
2954 /* Build the corresponding TEMPLATE_DECL. */
2955 d = build_decl (TEMPLATE_DECL, name, t);
2956 TYPE_NAME (TREE_TYPE (d)) = d;
2957 TYPE_STUB_DECL (TREE_TYPE (d)) = d;
2958 DECL_CONTEXT (d) = FROB_CONTEXT (context);
2959 DECL_ARTIFICIAL (d) = 1;
2960 DECL_TEMPLATE_PARMS (d) = parm_list;
2967 /* Push the declarations of builtin types into the namespace.
2968 RID_INDEX is the index of the builtin type in the array
2969 RID_POINTERS. NAME is the name used when looking up the builtin
2970 type. TYPE is the _TYPE node for the builtin type. */
2973 record_builtin_type (enum rid rid_index,
2977 tree rname = NULL_TREE, tname = NULL_TREE;
2978 tree tdecl = NULL_TREE;
2980 if ((int) rid_index < (int) RID_MAX)
2981 rname = ridpointers[(int) rid_index];
2983 tname = get_identifier (name);
2985 /* The calls to SET_IDENTIFIER_GLOBAL_VALUE below should be
2986 eliminated. Built-in types should not be looked up name; their
2987 names are keywords that the parser can recognize. However, there
2988 is code in c-common.c that uses identifier_global_value to look
2989 up built-in types by name. */
2992 tdecl = build_decl (TYPE_DECL, tname, type);
2993 DECL_ARTIFICIAL (tdecl) = 1;
2994 SET_IDENTIFIER_GLOBAL_VALUE (tname, tdecl);
3000 tdecl = build_decl (TYPE_DECL, rname, type);
3001 DECL_ARTIFICIAL (tdecl) = 1;
3003 SET_IDENTIFIER_GLOBAL_VALUE (rname, tdecl);
3006 if (!TYPE_NAME (type))
3007 TYPE_NAME (type) = tdecl;
3010 debug_hooks->type_decl (tdecl, 0);
3013 /* Record one of the standard Java types.
3014 * Declare it as having the given NAME.
3015 * If SIZE > 0, it is the size of one of the integral types;
3016 * otherwise it is the negative of the size of one of the other types. */
3019 record_builtin_java_type (const char* name, int size)
3023 type = make_signed_type (size);
3024 else if (size > -32)
3025 { /* "__java_char" or ""__java_boolean". */
3026 type = make_unsigned_type (-size);
3027 /*if (size == -1) TREE_SET_CODE (type, BOOLEAN_TYPE);*/
3030 { /* "__java_float" or ""__java_double". */
3031 type = make_node (REAL_TYPE);
3032 TYPE_PRECISION (type) = - size;
3035 record_builtin_type (RID_MAX, name, type);
3036 decl = TYPE_NAME (type);
3038 /* Suppress generate debug symbol entries for these types,
3039 since for normal C++ they are just clutter.
3040 However, push_lang_context undoes this if extern "Java" is seen. */
3041 DECL_IGNORED_P (decl) = 1;
3043 TYPE_FOR_JAVA (type) = 1;
3047 /* Push a type into the namespace so that the back ends ignore it. */
3050 record_unknown_type (tree type, const char* name)
3052 tree decl = pushdecl (build_decl (TYPE_DECL, get_identifier (name), type));
3053 /* Make sure the "unknown type" typedecl gets ignored for debug info. */
3054 DECL_IGNORED_P (decl) = 1;
3055 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
3056 TYPE_SIZE (type) = TYPE_SIZE (void_type_node);
3057 TYPE_ALIGN (type) = 1;
3058 TYPE_USER_ALIGN (type) = 0;
3059 TYPE_MODE (type) = TYPE_MODE (void_type_node);
3062 /* A string for which we should create an IDENTIFIER_NODE at
3065 typedef struct predefined_identifier
3067 /* The name of the identifier. */
3068 const char *const name;
3069 /* The place where the IDENTIFIER_NODE should be stored. */
3071 /* Nonzero if this is the name of a constructor or destructor. */
3072 const int ctor_or_dtor_p;
3073 } predefined_identifier;
3075 /* Create all the predefined identifiers. */
3078 initialize_predefined_identifiers (void)
3080 const predefined_identifier *pid;
3082 /* A table of identifiers to create at startup. */
3083 static const predefined_identifier predefined_identifiers[] = {
3084 { "C++", &lang_name_cplusplus, 0 },
3085 { "C", &lang_name_c, 0 },
3086 { "Java", &lang_name_java, 0 },
3087 /* Some of these names have a trailing space so that it is
3088 impossible for them to conflict with names written by users. */
3089 { "__ct ", &ctor_identifier, 1 },
3090 { "__base_ctor ", &base_ctor_identifier, 1 },
3091 { "__comp_ctor ", &complete_ctor_identifier, 1 },
3092 { "__dt ", &dtor_identifier, 1 },
3093 { "__comp_dtor ", &complete_dtor_identifier, 1 },
3094 { "__base_dtor ", &base_dtor_identifier, 1 },
3095 { "__deleting_dtor ", &deleting_dtor_identifier, 1 },
3096 { IN_CHARGE_NAME, &in_charge_identifier, 0 },
3097 { "nelts", &nelts_identifier, 0 },
3098 { THIS_NAME, &this_identifier, 0 },
3099 { VTABLE_DELTA_NAME, &delta_identifier, 0 },
3100 { VTABLE_PFN_NAME, &pfn_identifier, 0 },
3101 { "_vptr", &vptr_identifier, 0 },
3102 { "__vtt_parm", &vtt_parm_identifier, 0 },
3103 { "::", &global_scope_name, 0 },
3104 { "std", &std_identifier, 0 },
3108 for (pid = predefined_identifiers; pid->name; ++pid)
3110 *pid->node = get_identifier (pid->name);
3111 if (pid->ctor_or_dtor_p)
3112 IDENTIFIER_CTOR_OR_DTOR_P (*pid->node) = 1;
3116 /* Create the predefined scalar types of C,
3117 and some nodes representing standard constants (0, 1, (void *)0).
3118 Initialize the global binding level.
3119 Make definitions for built-in primitive functions. */
3122 cxx_init_decl_processing (void)
3125 tree void_ftype_ptr;
3127 build_common_tree_nodes (flag_signed_char, false);
3129 /* Create all the identifiers we need. */
3130 initialize_predefined_identifiers ();
3132 /* Create the global variables. */
3133 push_to_top_level ();
3135 current_function_decl = NULL_TREE;
3136 current_binding_level = NULL;
3137 /* Enter the global namespace. */
3138 gcc_assert (global_namespace == NULL_TREE);
3139 global_namespace = build_lang_decl (NAMESPACE_DECL, global_scope_name,
3141 TREE_PUBLIC (global_namespace) = 1;
3142 begin_scope (sk_namespace, global_namespace);
3144 current_lang_name = NULL_TREE;
3146 /* Adjust various flags based on command-line settings. */
3147 if (!flag_permissive)
3148 flag_pedantic_errors = 1;
3149 if (!flag_no_inline)
3151 flag_inline_trees = 1;
3154 if (flag_inline_functions)
3155 flag_inline_trees = 2;
3157 /* Force minimum function alignment if using the least significant
3158 bit of function pointers to store the virtual bit. */
3159 if (TARGET_PTRMEMFUNC_VBIT_LOCATION == ptrmemfunc_vbit_in_pfn
3160 && force_align_functions_log < 1)
3161 force_align_functions_log = 1;
3164 current_lang_name = lang_name_c;
3166 /* Create the `std' namespace. */
3167 push_namespace (std_identifier);
3168 std_node = current_namespace;
3171 c_common_nodes_and_builtins ();
3173 java_byte_type_node = record_builtin_java_type ("__java_byte", 8);
3174 java_short_type_node = record_builtin_java_type ("__java_short", 16);
3175 java_int_type_node = record_builtin_java_type ("__java_int", 32);
3176 java_long_type_node = record_builtin_java_type ("__java_long", 64);
3177 java_float_type_node = record_builtin_java_type ("__java_float", -32);
3178 java_double_type_node = record_builtin_java_type ("__java_double", -64);
3179 java_char_type_node = record_builtin_java_type ("__java_char", -16);
3180 java_boolean_type_node = record_builtin_java_type ("__java_boolean", -1);
3182 integer_two_node = build_int_cst (NULL_TREE, 2);
3183 integer_three_node = build_int_cst (NULL_TREE, 3);
3185 record_builtin_type (RID_BOOL, "bool", boolean_type_node);
3186 truthvalue_type_node = boolean_type_node;
3187 truthvalue_false_node = boolean_false_node;
3188 truthvalue_true_node = boolean_true_node;
3190 empty_except_spec = build_tree_list (NULL_TREE, NULL_TREE);
3193 record_builtin_type (RID_MAX, NULL, string_type_node);
3196 delta_type_node = ptrdiff_type_node;
3197 vtable_index_type = ptrdiff_type_node;
3199 vtt_parm_type = build_pointer_type (const_ptr_type_node);
3200 void_ftype = build_function_type (void_type_node, void_list_node);
3201 void_ftype_ptr = build_function_type (void_type_node,
3202 tree_cons (NULL_TREE,
3206 = build_exception_variant (void_ftype_ptr, empty_except_spec);
3208 /* C++ extensions */
3210 unknown_type_node = make_node (UNKNOWN_TYPE);
3211 record_unknown_type (unknown_type_node, "unknown type");
3213 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
3214 TREE_TYPE (unknown_type_node) = unknown_type_node;
3216 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
3218 TYPE_POINTER_TO (unknown_type_node) = unknown_type_node;
3219 TYPE_REFERENCE_TO (unknown_type_node) = unknown_type_node;
3222 /* Make sure we get a unique function type, so we can give
3223 its pointer type a name. (This wins for gdb.) */
3224 tree vfunc_type = make_node (FUNCTION_TYPE);
3225 TREE_TYPE (vfunc_type) = integer_type_node;
3226 TYPE_ARG_TYPES (vfunc_type) = NULL_TREE;
3227 layout_type (vfunc_type);
3229 vtable_entry_type = build_pointer_type (vfunc_type);
3231 record_builtin_type (RID_MAX, VTBL_PTR_TYPE, vtable_entry_type);
3234 = build_cplus_array_type (vtable_entry_type, NULL_TREE);
3235 layout_type (vtbl_type_node);
3236 vtbl_type_node = build_qualified_type (vtbl_type_node, TYPE_QUAL_CONST);
3237 record_builtin_type (RID_MAX, NULL, vtbl_type_node);
3238 vtbl_ptr_type_node = build_pointer_type (vtable_entry_type);
3239 layout_type (vtbl_ptr_type_node);
3240 record_builtin_type (RID_MAX, NULL, vtbl_ptr_type_node);
3242 push_namespace (get_identifier ("__cxxabiv1"));
3243 abi_node = current_namespace;
3246 global_type_node = make_node (LANG_TYPE);
3247 record_unknown_type (global_type_node, "global type");
3250 current_lang_name = lang_name_cplusplus;
3254 tree bad_alloc_type_node;
3255 tree bad_alloc_decl;
3256 tree newtype, deltype;
3257 tree ptr_ftype_sizetype;
3259 push_namespace (std_identifier);
3260 bad_alloc_id = get_identifier ("bad_alloc");
3261 bad_alloc_type_node = make_aggr_type (RECORD_TYPE);
3262 TYPE_CONTEXT (bad_alloc_type_node) = current_namespace;
3264 = create_implicit_typedef (bad_alloc_id, bad_alloc_type_node);
3265 DECL_CONTEXT (bad_alloc_decl) = current_namespace;
3266 TYPE_STUB_DECL (bad_alloc_type_node) = bad_alloc_decl;
3270 = build_function_type (ptr_type_node,
3271 tree_cons (NULL_TREE,
3274 newtype = build_exception_variant
3275 (ptr_ftype_sizetype, add_exception_specifier
3276 (NULL_TREE, bad_alloc_type_node, -1));
3277 deltype = build_exception_variant (void_ftype_ptr, empty_except_spec);
3278 push_cp_library_fn (NEW_EXPR, newtype);
3279 push_cp_library_fn (VEC_NEW_EXPR, newtype);
3280 global_delete_fndecl = push_cp_library_fn (DELETE_EXPR, deltype);
3281 push_cp_library_fn (VEC_DELETE_EXPR, deltype);
3285 = build_library_fn_ptr ("__cxa_pure_virtual", void_ftype);
3287 /* Perform other language dependent initializations. */
3288 init_class_processing ();
3289 init_rtti_processing ();
3291 if (flag_exceptions)
3292 init_exception_processing ();
3294 if (! supports_one_only ())
3297 make_fname_decl = cp_make_fname_decl;
3298 start_fname_decls ();
3300 /* Show we use EH for cleanups. */
3301 if (flag_exceptions)
3302 using_eh_for_cleanups ();
3305 /* Generate an initializer for a function naming variable from
3306 NAME. NAME may be NULL, to indicate a dependent name. TYPE_P is
3307 filled in with the type of the init. */
3310 cp_fname_init (const char* name, tree *type_p)
3312 tree domain = NULL_TREE;
3314 tree init = NULL_TREE;
3319 length = strlen (name);
3320 domain = build_index_type (size_int (length));
3321 init = build_string (length + 1, name);
3324 type = build_qualified_type (char_type_node, TYPE_QUAL_CONST);
3325 type = build_cplus_array_type (type, domain);
3330 TREE_TYPE (init) = type;
3332 init = error_mark_node;
3337 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give the
3338 decl, NAME is the initialization string and TYPE_DEP indicates whether
3339 NAME depended on the type of the function. We make use of that to detect
3340 __PRETTY_FUNCTION__ inside a template fn. This is being done
3341 lazily at the point of first use, so we mustn't push the decl now. */
3344 cp_make_fname_decl (tree id, int type_dep)
3346 const char *const name = (type_dep && processing_template_decl
3347 ? NULL : fname_as_string (type_dep));
3349 tree init = cp_fname_init (name, &type);
3350 tree decl = build_decl (VAR_DECL, id, type);
3353 free ((char *) name);
3355 /* As we're using pushdecl_with_scope, we must set the context. */
3356 DECL_CONTEXT (decl) = current_function_decl;
3357 DECL_PRETTY_FUNCTION_P (decl) = type_dep;
3359 TREE_STATIC (decl) = 1;
3360 TREE_READONLY (decl) = 1;
3361 DECL_ARTIFICIAL (decl) = 1;
3363 TREE_USED (decl) = 1;
3365 if (current_function_decl)
3367 struct cp_binding_level *b = current_binding_level;
3368 while (b->level_chain->kind != sk_function_parms)
3370 pushdecl_with_scope (decl, b, /*is_friend=*/false);
3371 cp_finish_decl (decl, init, /*init_const_expr_p=*/false, NULL_TREE,
3372 LOOKUP_ONLYCONVERTING);
3375 pushdecl_top_level_and_finish (decl, init);
3381 builtin_function_1 (tree decl, tree context)
3383 tree id = DECL_NAME (decl);
3384 const char *name = IDENTIFIER_POINTER (id);
3386 retrofit_lang_decl (decl);
3388 /* All nesting of C++ functions is lexical; there is never a "static
3389 chain" in the sense of GNU C nested functions. */
3390 DECL_NO_STATIC_CHAIN (decl) = 1;
3392 DECL_ARTIFICIAL (decl) = 1;
3393 SET_OVERLOADED_OPERATOR_CODE (decl, ERROR_MARK);
3394 SET_DECL_LANGUAGE (decl, lang_c);
3395 /* Runtime library routines are, by definition, available in an
3396 external shared object. */
3397 DECL_VISIBILITY (decl) = VISIBILITY_DEFAULT;
3398 DECL_VISIBILITY_SPECIFIED (decl) = 1;
3400 DECL_CONTEXT (decl) = context;
3404 /* A function in the user's namespace should have an explicit
3405 declaration before it is used. Mark the built-in function as
3406 anticipated but not actually declared. */
3407 if (name[0] != '_' || name[1] != '_')
3408 DECL_ANTICIPATED (decl) = 1;
3414 cxx_builtin_function (tree decl)
3416 tree id = DECL_NAME (decl);
3417 const char *name = IDENTIFIER_POINTER (id);
3418 /* All builtins that don't begin with an '_' should additionally
3419 go in the 'std' namespace. */
3422 tree decl2 = copy_node(decl);
3423 push_namespace (std_identifier);
3424 builtin_function_1 (decl2, std_node);
3428 return builtin_function_1 (decl, NULL_TREE);
3431 /* Generate a FUNCTION_DECL with the typical flags for a runtime library
3432 function. Not called directly. */
3435 build_library_fn_1 (tree name, enum tree_code operator_code, tree type)
3437 tree fn = build_lang_decl (FUNCTION_DECL, name, type);
3438 DECL_EXTERNAL (fn) = 1;
3439 TREE_PUBLIC (fn) = 1;
3440 DECL_ARTIFICIAL (fn) = 1;
3441 SET_OVERLOADED_OPERATOR_CODE (fn, operator_code);
3442 SET_DECL_LANGUAGE (fn, lang_c);
3443 /* Runtime library routines are, by definition, available in an
3444 external shared object. */
3445 DECL_VISIBILITY (fn) = VISIBILITY_DEFAULT;
3446 DECL_VISIBILITY_SPECIFIED (fn) = 1;
3450 /* Returns the _DECL for a library function with C linkage.
3451 We assume that such functions never throw; if this is incorrect,
3452 callers should unset TREE_NOTHROW. */
3455 build_library_fn (tree name, tree type)
3457 tree fn = build_library_fn_1 (name, ERROR_MARK, type);
3458 TREE_NOTHROW (fn) = 1;
3462 /* Returns the _DECL for a library function with C++ linkage. */
3465 build_cp_library_fn (tree name, enum tree_code operator_code, tree type)
3467 tree fn = build_library_fn_1 (name, operator_code, type);
3468 TREE_NOTHROW (fn) = TYPE_NOTHROW_P (type);
3469 DECL_CONTEXT (fn) = FROB_CONTEXT (current_namespace);
3470 SET_DECL_LANGUAGE (fn, lang_cplusplus);
3474 /* Like build_library_fn, but takes a C string instead of an
3478 build_library_fn_ptr (const char* name, tree type)
3480 return build_library_fn (get_identifier (name), type);
3483 /* Like build_cp_library_fn, but takes a C string instead of an
3487 build_cp_library_fn_ptr (const char* name, tree type)
3489 return build_cp_library_fn (get_identifier (name), ERROR_MARK, type);
3492 /* Like build_library_fn, but also pushes the function so that we will
3493 be able to find it via IDENTIFIER_GLOBAL_VALUE. */
3496 push_library_fn (tree name, tree type)
3498 tree fn = build_library_fn (name, type);
3499 pushdecl_top_level (fn);
3503 /* Like build_cp_library_fn, but also pushes the function so that it
3504 will be found by normal lookup. */
3507 push_cp_library_fn (enum tree_code operator_code, tree type)
3509 tree fn = build_cp_library_fn (ansi_opname (operator_code),
3516 /* Like push_library_fn, but takes a TREE_LIST of parm types rather than
3520 push_void_library_fn (tree name, tree parmtypes)
3522 tree type = build_function_type (void_type_node, parmtypes);
3523 return push_library_fn (name, type);
3526 /* Like push_library_fn, but also note that this function throws
3527 and does not return. Used for __throw_foo and the like. */
3530 push_throw_library_fn (tree name, tree type)
3532 tree fn = push_library_fn (name, type);
3533 TREE_THIS_VOLATILE (fn) = 1;
3534 TREE_NOTHROW (fn) = 0;
3538 /* When we call finish_struct for an anonymous union, we create
3539 default copy constructors and such. But, an anonymous union
3540 shouldn't have such things; this function undoes the damage to the
3541 anonymous union type T.
3543 (The reason that we create the synthesized methods is that we don't
3544 distinguish `union { int i; }' from `typedef union { int i; } U'.
3545 The first is an anonymous union; the second is just an ordinary
3549 fixup_anonymous_aggr (tree t)
3553 /* Wipe out memory of synthesized methods. */
3554 TYPE_HAS_CONSTRUCTOR (t) = 0;
3555 TYPE_HAS_DEFAULT_CONSTRUCTOR (t) = 0;
3556 TYPE_HAS_INIT_REF (t) = 0;
3557 TYPE_HAS_CONST_INIT_REF (t) = 0;
3558 TYPE_HAS_ASSIGN_REF (t) = 0;
3559 TYPE_HAS_CONST_ASSIGN_REF (t) = 0;
3561 /* Splice the implicitly generated functions out of the TYPE_METHODS
3563 q = &TYPE_METHODS (t);
3566 if (DECL_ARTIFICIAL (*q))
3567 *q = TREE_CHAIN (*q);
3569 q = &TREE_CHAIN (*q);
3572 /* ISO C++ 9.5.3. Anonymous unions may not have function members. */
3573 if (TYPE_METHODS (t))
3574 error ("%Jan anonymous union cannot have function members",
3575 TYPE_MAIN_DECL (t));
3577 /* Anonymous aggregates cannot have fields with ctors, dtors or complex
3578 assignment operators (because they cannot have these methods themselves).
3579 For anonymous unions this is already checked because they are not allowed
3580 in any union, otherwise we have to check it. */
3581 if (TREE_CODE (t) != UNION_TYPE)
3585 for (field = TYPE_FIELDS (t); field; field = TREE_CHAIN (field))
3586 if (TREE_CODE (field) == FIELD_DECL)
3588 type = TREE_TYPE (field);
3589 if (CLASS_TYPE_P (type))
3591 if (TYPE_NEEDS_CONSTRUCTING (type))
3592 error ("member %q+#D with constructor not allowed "
3593 "in anonymous aggregate", field);
3594 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
3595 error ("member %q+#D with destructor not allowed "
3596 "in anonymous aggregate", field);
3597 if (TYPE_HAS_COMPLEX_ASSIGN_REF (type))
3598 error ("member %q+#D with copy assignment operator "
3599 "not allowed in anonymous aggregate", field);
3605 /* Make sure that a declaration with no declarator is well-formed, i.e.
3606 just declares a tagged type or anonymous union.
3608 Returns the type declared; or NULL_TREE if none. */
3611 check_tag_decl (cp_decl_specifier_seq *declspecs)
3613 int saw_friend = declspecs->specs[(int)ds_friend] != 0;
3614 int saw_typedef = declspecs->specs[(int)ds_typedef] != 0;
3615 /* If a class, struct, or enum type is declared by the DECLSPECS
3616 (i.e, if a class-specifier, enum-specifier, or non-typename
3617 elaborated-type-specifier appears in the DECLSPECS),
3618 DECLARED_TYPE is set to the corresponding type. */
3619 tree declared_type = NULL_TREE;
3620 bool error_p = false;
3622 if (declspecs->multiple_types_p)
3623 error ("multiple types in one declaration");
3624 else if (declspecs->redefined_builtin_type)
3626 if (!in_system_header)
3627 pedwarn ("redeclaration of C++ built-in type %qT",
3628 declspecs->redefined_builtin_type);
3633 && TYPE_P (declspecs->type)
3634 && ((TREE_CODE (declspecs->type) != TYPENAME_TYPE
3635 && IS_AGGR_TYPE (declspecs->type))
3636 || TREE_CODE (declspecs->type) == ENUMERAL_TYPE))
3637 declared_type = declspecs->type;
3638 else if (declspecs->type == error_mark_node)
3640 if (declared_type == NULL_TREE && ! saw_friend && !error_p)
3641 pedwarn ("declaration does not declare anything");
3642 /* Check for an anonymous union. */
3643 else if (declared_type && IS_AGGR_TYPE_CODE (TREE_CODE (declared_type))
3644 && TYPE_ANONYMOUS_P (declared_type))
3646 /* 7/3 In a simple-declaration, the optional init-declarator-list
3647 can be omitted only when declaring a class (clause 9) or
3648 enumeration (7.2), that is, when the decl-specifier-seq contains
3649 either a class-specifier, an elaborated-type-specifier with
3650 a class-key (9.1), or an enum-specifier. In these cases and
3651 whenever a class-specifier or enum-specifier is present in the
3652 decl-specifier-seq, the identifiers in these specifiers are among
3653 the names being declared by the declaration (as class-name,
3654 enum-names, or enumerators, depending on the syntax). In such
3655 cases, and except for the declaration of an unnamed bit-field (9.6),
3656 the decl-specifier-seq shall introduce one or more names into the
3657 program, or shall redeclare a name introduced by a previous
3658 declaration. [Example:
3659 enum { }; // ill-formed
3660 typedef class { }; // ill-formed
3664 error ("missing type-name in typedef-declaration");
3667 /* Anonymous unions are objects, so they can have specifiers. */;
3668 SET_ANON_AGGR_TYPE_P (declared_type);
3670 if (TREE_CODE (declared_type) != UNION_TYPE && pedantic
3671 && !in_system_header)
3672 pedwarn ("ISO C++ prohibits anonymous structs");
3677 if (declspecs->specs[(int)ds_inline]
3678 || declspecs->specs[(int)ds_virtual])
3679 error ("%qs can only be specified for functions",
3680 declspecs->specs[(int)ds_inline]
3681 ? "inline" : "virtual");
3683 && (!current_class_type
3684 || current_scope () != current_class_type))
3685 error ("%<friend%> can only be specified inside a class");
3686 else if (declspecs->specs[(int)ds_explicit])
3687 error ("%<explicit%> can only be specified for constructors");
3688 else if (declspecs->storage_class)
3689 error ("a storage class can only be specified for objects "
3691 else if (declspecs->specs[(int)ds_const]
3692 || declspecs->specs[(int)ds_volatile]
3693 || declspecs->specs[(int)ds_restrict]
3694 || declspecs->specs[(int)ds_thread])
3695 error ("qualifiers can only be specified for objects "
3697 else if (saw_typedef)
3698 warning (0, "%<typedef%> was ignored in this declaration");
3701 return declared_type;
3704 /* Called when a declaration is seen that contains no names to declare.
3705 If its type is a reference to a structure, union or enum inherited
3706 from a containing scope, shadow that tag name for the current scope
3707 with a forward reference.
3708 If its type defines a new named structure or union
3709 or defines an enum, it is valid but we need not do anything here.
3710 Otherwise, it is an error.
3712 C++: may have to grok the declspecs to learn about static,
3713 complain for anonymous unions.
3715 Returns the TYPE declared -- or NULL_TREE if none. */
3718 shadow_tag (cp_decl_specifier_seq *declspecs)
3720 tree t = check_tag_decl (declspecs);
3725 if (declspecs->attributes)
3727 warning (0, "attribute ignored in declaration of %q+#T", t);
3728 warning (0, "attribute for %q+#T must follow the %qs keyword",
3729 t, class_key_or_enum_as_string (t));
3733 if (maybe_process_partial_specialization (t) == error_mark_node)
3736 /* This is where the variables in an anonymous union are
3737 declared. An anonymous union declaration looks like:
3739 because there is no declarator after the union, the parser
3740 sends that declaration here. */
3741 if (ANON_AGGR_TYPE_P (t))
3743 fixup_anonymous_aggr (t);
3745 if (TYPE_FIELDS (t))
3747 tree decl = grokdeclarator (/*declarator=*/NULL,
3748 declspecs, NORMAL, 0, NULL);
3749 finish_anon_union (decl);
3756 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
3759 groktypename (cp_decl_specifier_seq *type_specifiers,
3760 const cp_declarator *declarator)
3764 attrs = type_specifiers->attributes;
3765 type_specifiers->attributes = NULL_TREE;
3766 type = grokdeclarator (declarator, type_specifiers, TYPENAME, 0, &attrs);
3768 cplus_decl_attributes (&type, attrs, 0);
3772 /* Decode a declarator in an ordinary declaration or data definition.
3773 This is called as soon as the type information and variable name
3774 have been parsed, before parsing the initializer if any.
3775 Here we create the ..._DECL node, fill in its type,
3776 and put it on the list of decls for the current context.
3777 The ..._DECL node is returned as the value.
3779 Exception: for arrays where the length is not specified,
3780 the type is left null, to be filled in by `cp_finish_decl'.
3782 Function definitions do not come here; they go to start_function
3783 instead. However, external and forward declarations of functions
3784 do go through here. Structure field declarations are done by
3785 grokfield and not through here. */
3788 start_decl (const cp_declarator *declarator,
3789 cp_decl_specifier_seq *declspecs,
3792 tree prefix_attributes,
3793 tree *pushed_scope_p)
3799 *pushed_scope_p = NULL_TREE;
3801 /* An object declared as __attribute__((deprecated)) suppresses
3802 warnings of uses of other deprecated items. */
3803 if (lookup_attribute ("deprecated", attributes))
3804 deprecated_state = DEPRECATED_SUPPRESS;
3806 attributes = chainon (attributes, prefix_attributes);
3808 decl = grokdeclarator (declarator, declspecs, NORMAL, initialized,
3811 deprecated_state = DEPRECATED_NORMAL;
3813 if (decl == NULL_TREE || TREE_CODE (decl) == VOID_TYPE
3814 || decl == error_mark_node)
3815 return error_mark_node;
3817 type = TREE_TYPE (decl);
3819 context = DECL_CONTEXT (decl);
3823 *pushed_scope_p = push_scope (context);
3825 /* We are only interested in class contexts, later. */
3826 if (TREE_CODE (context) == NAMESPACE_DECL)
3827 context = NULL_TREE;
3831 /* Is it valid for this decl to have an initializer at all?
3832 If not, set INITIALIZED to zero, which will indirectly
3833 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
3834 switch (TREE_CODE (decl))
3837 error ("typedef %qD is initialized (use __typeof__ instead)", decl);
3838 return error_mark_node;
3841 error ("function %q#D is initialized like a variable", decl);
3842 return error_mark_node;
3850 if (! toplevel_bindings_p ()
3851 && DECL_EXTERNAL (decl))
3852 warning (0, "declaration of %q#D has %<extern%> and is initialized",
3854 DECL_EXTERNAL (decl) = 0;
3855 if (toplevel_bindings_p ())
3856 TREE_STATIC (decl) = 1;
3859 /* Set attributes here so if duplicate decl, will have proper attributes. */
3860 cplus_decl_attributes (&decl, attributes, 0);
3862 /* Dllimported symbols cannot be defined. Static data members (which
3863 can be initialized in-class and dllimported) go through grokfield,
3864 not here, so we don't need to exclude those decls when checking for
3866 if (initialized && DECL_DLLIMPORT_P (decl))
3868 error ("definition of %q#D is marked %<dllimport%>", decl);
3869 DECL_DLLIMPORT_P (decl) = 0;
3872 /* If #pragma weak was used, mark the decl weak now. */
3873 maybe_apply_pragma_weak (decl);
3875 if (TREE_CODE (decl) == FUNCTION_DECL
3876 && DECL_DECLARED_INLINE_P (decl)
3877 && DECL_UNINLINABLE (decl)
3878 && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl)))
3879 warning (0, "inline function %q+D given attribute noinline", decl);
3881 if (context && COMPLETE_TYPE_P (complete_type (context)))
3883 if (TREE_CODE (decl) == VAR_DECL)
3885 tree field = lookup_field (context, DECL_NAME (decl), 0, false);
3886 if (field == NULL_TREE || TREE_CODE (field) != VAR_DECL)
3887 error ("%q#D is not a static member of %q#T", decl, context);
3890 if (DECL_CONTEXT (field) != context)
3892 if (!same_type_p (DECL_CONTEXT (field), context))
3893 pedwarn ("ISO C++ does not permit %<%T::%D%> "
3894 "to be defined as %<%T::%D%>",
3895 DECL_CONTEXT (field), DECL_NAME (decl),
3896 context, DECL_NAME (decl));
3897 DECL_CONTEXT (decl) = DECL_CONTEXT (field);
3899 if (processing_specialization
3900 && template_class_depth (context) == 0
3901 && CLASSTYPE_TEMPLATE_SPECIALIZATION (context))
3902 error ("template header not allowed in member definition "
3903 "of explicitly specialized class");
3904 /* Static data member are tricky; an in-class initialization
3905 still doesn't provide a definition, so the in-class
3906 declaration will have DECL_EXTERNAL set, but will have an
3907 initialization. Thus, duplicate_decls won't warn
3908 about this situation, and so we check here. */
3909 if (initialized && DECL_INITIALIZED_IN_CLASS_P (field))
3910 error ("duplicate initialization of %qD", decl);
3911 if (duplicate_decls (decl, field, /*newdecl_is_friend=*/false))
3917 tree field = check_classfn (context, decl,
3918 (processing_template_decl
3919 > template_class_depth (context))
3920 ? current_template_parms
3922 if (field && duplicate_decls (decl, field,
3923 /*newdecl_is_friend=*/false))
3927 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
3928 DECL_IN_AGGR_P (decl) = 0;
3929 /* Do not mark DECL as an explicit specialization if it was not
3930 already marked as an instantiation; a declaration should
3931 never be marked as a specialization unless we know what
3932 template is being specialized. */
3933 if (DECL_LANG_SPECIFIC (decl) && DECL_USE_TEMPLATE (decl))
3935 SET_DECL_TEMPLATE_SPECIALIZATION (decl);
3937 /* [temp.expl.spec] An explicit specialization of a static data
3938 member of a template is a definition if the declaration
3939 includes an initializer; otherwise, it is a declaration.
3941 We check for processing_specialization so this only applies
3942 to the new specialization syntax. */
3943 if (!initialized && processing_specialization)
3944 DECL_EXTERNAL (decl) = 1;
3947 if (DECL_EXTERNAL (decl) && ! DECL_TEMPLATE_SPECIALIZATION (decl))
3948 pedwarn ("declaration of %q#D outside of class is not definition",
3952 /* Enter this declaration into the symbol table. */
3953 tem = maybe_push_decl (decl);
3955 if (processing_template_decl)
3956 tem = push_template_decl (tem);
3957 if (tem == error_mark_node)
3958 return error_mark_node;
3960 /* Tell the back end to use or not use .common as appropriate. If we say
3961 -fconserve-space, we want this to save .data space, at the expense of
3962 wrong semantics. If we say -fno-conserve-space, we want this to
3963 produce errors about redefs; to do this we force variables into the
3965 if (flag_conserve_space
3966 && TREE_CODE (tem) == VAR_DECL
3967 && TREE_PUBLIC (tem)
3968 && !DECL_THREAD_LOCAL_P (tem)
3969 && !have_global_bss_p ())
3970 DECL_COMMON (tem) = 1;
3972 if (!processing_template_decl && TREE_CODE (tem) == VAR_DECL)
3973 start_decl_1 (tem, initialized);
3979 start_decl_1 (tree decl, bool initialized)
3983 gcc_assert (!processing_template_decl);
3985 if (error_operand_p (decl))
3988 gcc_assert (TREE_CODE (decl) == VAR_DECL);
3989 type = TREE_TYPE (decl);
3992 /* Is it valid for this decl to have an initializer at all?
3993 If not, set INITIALIZED to zero, which will indirectly
3994 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
3996 /* Don't allow initializations for incomplete types except for
3997 arrays which might be completed by the initialization. */
3998 if (COMPLETE_TYPE_P (complete_type (type)))
3999 ; /* A complete type is ok. */
4000 else if (TREE_CODE (type) != ARRAY_TYPE)
4002 error ("variable %q#D has initializer but incomplete type", decl);
4004 type = TREE_TYPE (decl) = error_mark_node;
4006 else if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (type))))
4008 if (DECL_LANG_SPECIFIC (decl) && DECL_TEMPLATE_INFO (decl))
4009 error ("elements of array %q#D have incomplete type", decl);
4010 /* else we already gave an error in start_decl. */
4014 else if (IS_AGGR_TYPE (type)
4015 && ! DECL_EXTERNAL (decl))
4017 if (!COMPLETE_TYPE_P (complete_type (type)))
4019 error ("aggregate %q#D has incomplete type and cannot be defined",
4021 /* Change the type so that assemble_variable will give
4022 DECL an rtl we can live with: (mem (const_int 0)). */
4023 type = TREE_TYPE (decl) = error_mark_node;
4027 /* If any base type in the hierarchy of TYPE needs a constructor,
4028 then we set initialized to 1. This way any nodes which are
4029 created for the purposes of initializing this aggregate
4030 will live as long as it does. This is necessary for global
4031 aggregates which do not have their initializers processed until
4032 the end of the file. */
4033 initialized = TYPE_NEEDS_CONSTRUCTING (type);
4037 /* Create a new scope to hold this declaration if necessary.
4038 Whether or not a new scope is necessary cannot be determined
4039 until after the type has been completed; if the type is a
4040 specialization of a class template it is not until after
4041 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
4042 will be set correctly. */
4043 maybe_push_cleanup_level (type);
4046 /* Handle initialization of references. DECL, TYPE, and INIT have the
4047 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
4048 but will be set to a new CLEANUP_STMT if a temporary is created
4049 that must be destroyed subsequently.
4051 Returns an initializer expression to use to initialize DECL, or
4052 NULL if the initialization can be performed statically.
4054 Quotes on semantics can be found in ARM 8.4.3. */
4057 grok_reference_init (tree decl, tree type, tree init, tree *cleanup)
4061 if (init == NULL_TREE)
4063 if ((DECL_LANG_SPECIFIC (decl) == 0
4064 || DECL_IN_AGGR_P (decl) == 0)
4065 && ! DECL_THIS_EXTERN (decl))
4066 error ("%qD declared as reference but not initialized", decl);
4070 if (TREE_CODE (init) == CONSTRUCTOR)
4072 error ("ISO C++ forbids use of initializer list to "
4073 "initialize reference %qD", decl);
4077 if (TREE_CODE (init) == TREE_LIST)
4078 init = build_x_compound_expr_from_list (init, "initializer");
4080 if (TREE_CODE (TREE_TYPE (type)) != ARRAY_TYPE
4081 && TREE_CODE (TREE_TYPE (init)) == ARRAY_TYPE)
4082 /* Note: default conversion is only called in very special cases. */
4083 init = decay_conversion (init);
4085 /* Convert INIT to the reference type TYPE. This may involve the
4086 creation of a temporary, whose lifetime must be the same as that
4087 of the reference. If so, a DECL_EXPR for the temporary will be
4088 added just after the DECL_EXPR for DECL. That's why we don't set
4089 DECL_INITIAL for local references (instead assigning to them
4090 explicitly); we need to allow the temporary to be initialized
4092 tmp = initialize_reference (type, init, decl, cleanup);
4094 if (tmp == error_mark_node)
4096 else if (tmp == NULL_TREE)
4098 error ("cannot initialize %qT from %qT", type, TREE_TYPE (init));
4102 if (TREE_STATIC (decl) && !TREE_CONSTANT (tmp))
4105 DECL_INITIAL (decl) = tmp;
4110 /* Designated initializers in arrays are not supported in GNU C++.
4111 The parser cannot detect this error since it does not know whether
4112 a given brace-enclosed initializer is for a class type or for an
4113 array. This function checks that CE does not use a designated
4114 initializer. If it does, an error is issued. Returns true if CE
4115 is valid, i.e., does not have a designated initializer. */
4118 check_array_designated_initializer (const constructor_elt *ce)
4120 /* Designated initializers for array elements are not supported. */
4123 /* The parser only allows identifiers as designated
4125 gcc_assert (TREE_CODE (ce->index) == IDENTIFIER_NODE);
4126 error ("name %qD used in a GNU-style designated "
4127 "initializer for an array", ce->index);
4134 /* When parsing `int a[] = {1, 2};' we don't know the size of the
4135 array until we finish parsing the initializer. If that's the
4136 situation we're in, update DECL accordingly. */
4139 maybe_deduce_size_from_array_init (tree decl, tree init)
4141 tree type = TREE_TYPE (decl);
4143 if (TREE_CODE (type) == ARRAY_TYPE
4144 && TYPE_DOMAIN (type) == NULL_TREE
4145 && TREE_CODE (decl) != TYPE_DECL)
4147 /* do_default is really a C-ism to deal with tentative definitions.
4148 But let's leave it here to ease the eventual merge. */
4149 int do_default = !DECL_EXTERNAL (decl);
4150 tree initializer = init ? init : DECL_INITIAL (decl);
4153 /* Check that there are no designated initializers in INIT, as
4154 those are not supported in GNU C++, and as the middle-end
4155 will crash if presented with a non-numeric designated
4157 if (initializer && TREE_CODE (initializer) == CONSTRUCTOR)
4159 VEC(constructor_elt,gc) *v = CONSTRUCTOR_ELTS (initializer);
4160 constructor_elt *ce;
4163 VEC_iterate (constructor_elt, v, i, ce);
4165 if (!check_array_designated_initializer (ce))
4171 failure = cp_complete_array_type (&TREE_TYPE (decl), initializer,
4175 error ("initializer fails to determine size of %qD", decl);
4176 TREE_TYPE (decl) = error_mark_node;
4178 else if (failure == 2)
4182 error ("array size missing in %qD", decl);
4183 TREE_TYPE (decl) = error_mark_node;
4185 /* If a `static' var's size isn't known, make it extern as
4186 well as static, so it does not get allocated. If it's not
4187 `static', then don't mark it extern; finish_incomplete_decl
4188 will give it a default size and it will get allocated. */
4189 else if (!pedantic && TREE_STATIC (decl) && !TREE_PUBLIC (decl))
4190 DECL_EXTERNAL (decl) = 1;
4192 else if (failure == 3)
4194 error ("zero-size array %qD", decl);
4195 TREE_TYPE (decl) = error_mark_node;
4199 cp_apply_type_quals_to_decl (cp_type_quals (TREE_TYPE (decl)), decl);
4201 layout_decl (decl, 0);
4205 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
4206 any appropriate error messages regarding the layout. */
4209 layout_var_decl (tree decl)
4213 type = TREE_TYPE (decl);
4214 if (type == error_mark_node)
4217 /* If we haven't already layed out this declaration, do so now.
4218 Note that we must not call complete type for an external object
4219 because it's type might involve templates that we are not
4220 supposed to instantiate yet. (And it's perfectly valid to say
4221 `extern X x' for some incomplete type `X'.) */
4222 if (!DECL_EXTERNAL (decl))
4223 complete_type (type);
4224 if (!DECL_SIZE (decl)
4225 && TREE_TYPE (decl) != error_mark_node
4226 && (COMPLETE_TYPE_P (type)
4227 || (TREE_CODE (type) == ARRAY_TYPE
4228 && !TYPE_DOMAIN (type)
4229 && COMPLETE_TYPE_P (TREE_TYPE (type)))))
4230 layout_decl (decl, 0);
4232 if (!DECL_EXTERNAL (decl) && DECL_SIZE (decl) == NULL_TREE)
4234 /* An automatic variable with an incomplete type: that is an error.
4235 Don't talk about array types here, since we took care of that
4236 message in grokdeclarator. */
4237 error ("storage size of %qD isn't known", decl);
4238 TREE_TYPE (decl) = error_mark_node;
4241 /* Keep this code around in case we later want to control debug info
4242 based on whether a type is "used". (jason 1999-11-11) */
4244 else if (!DECL_EXTERNAL (decl) && IS_AGGR_TYPE (ttype))
4245 /* Let debugger know it should output info for this type. */
4246 note_debug_info_needed (ttype);
4248 if (TREE_STATIC (decl) && DECL_CLASS_SCOPE_P (decl))
4249 note_debug_info_needed (DECL_CONTEXT (decl));
4252 if ((DECL_EXTERNAL (decl) || TREE_STATIC (decl))
4253 && DECL_SIZE (decl) != NULL_TREE
4254 && ! TREE_CONSTANT (DECL_SIZE (decl)))
4256 if (TREE_CODE (DECL_SIZE (decl)) == INTEGER_CST)
4257 constant_expression_warning (DECL_SIZE (decl));
4259 error ("storage size of %qD isn't constant", decl);
4263 /* If a local static variable is declared in an inline function, or if
4264 we have a weak definition, we must endeavor to create only one
4265 instance of the variable at link-time. */
4268 maybe_commonize_var (tree decl)
4270 /* Static data in a function with comdat linkage also has comdat
4272 if (TREE_STATIC (decl)
4273 /* Don't mess with __FUNCTION__. */
4274 && ! DECL_ARTIFICIAL (decl)
4275 && DECL_FUNCTION_SCOPE_P (decl)
4276 /* Unfortunately, import_export_decl has not always been called
4277 before the function is processed, so we cannot simply check
4279 && (DECL_COMDAT (DECL_CONTEXT (decl))
4280 || ((DECL_DECLARED_INLINE_P (DECL_CONTEXT (decl))
4281 || DECL_TEMPLATE_INSTANTIATION (DECL_CONTEXT (decl)))
4282 && TREE_PUBLIC (DECL_CONTEXT (decl)))))
4286 /* With weak symbols, we simply make the variable COMDAT;
4287 that will cause copies in multiple translations units to
4289 comdat_linkage (decl);
4293 if (DECL_INITIAL (decl) == NULL_TREE
4294 || DECL_INITIAL (decl) == error_mark_node)
4296 /* Without weak symbols, we can use COMMON to merge
4297 uninitialized variables. */
4298 TREE_PUBLIC (decl) = 1;
4299 DECL_COMMON (decl) = 1;
4303 /* While for initialized variables, we must use internal
4304 linkage -- which means that multiple copies will not
4306 TREE_PUBLIC (decl) = 0;
4307 DECL_COMMON (decl) = 0;
4308 warning (0, "sorry: semantics of inline function static "
4309 "data %q+#D are wrong (you'll wind up "
4310 "with multiple copies)", decl);
4311 warning (0, "%J you can work around this by removing "
4317 else if (DECL_LANG_SPECIFIC (decl) && DECL_COMDAT (decl))
4318 /* Set it up again; we might have set DECL_INITIAL since the last
4320 comdat_linkage (decl);
4323 /* Issue an error message if DECL is an uninitialized const variable. */
4326 check_for_uninitialized_const_var (tree decl)
4328 tree type = TREE_TYPE (decl);
4330 /* ``Unless explicitly declared extern, a const object does not have
4331 external linkage and must be initialized. ($8.4; $12.1)'' ARM
4333 if (TREE_CODE (decl) == VAR_DECL
4334 && TREE_CODE (type) != REFERENCE_TYPE
4335 && CP_TYPE_CONST_P (type)
4336 && !TYPE_NEEDS_CONSTRUCTING (type)
4337 && !DECL_INITIAL (decl))
4338 error ("uninitialized const %qD", decl);
4342 /* Structure holding the current initializer being processed by reshape_init.
4343 CUR is a pointer to the current element being processed, END is a pointer
4344 after the last element present in the initializer. */
4345 typedef struct reshape_iterator_t
4347 constructor_elt *cur;
4348 constructor_elt *end;
4351 static tree reshape_init_r (tree, reshape_iter *, bool);
4353 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
4354 returned is the next FIELD_DECL (possibly FIELD itself) that can be
4355 initialized. If there are no more such fields, the return value
4359 next_initializable_field (tree field)
4362 && (TREE_CODE (field) != FIELD_DECL
4363 || (DECL_C_BIT_FIELD (field) && !DECL_NAME (field))
4364 || DECL_ARTIFICIAL (field)))
4365 field = TREE_CHAIN (field);
4370 /* Subroutine of reshape_init_array and reshape_init_vector, which does
4371 the actual work. ELT_TYPE is the element type of the array. MAX_INDEX is an
4372 INTEGER_CST representing the size of the array minus one (the maximum index),
4373 or NULL_TREE if the array was declared without specifying the size. D is
4374 the iterator within the constructor. */
4377 reshape_init_array_1 (tree elt_type, tree max_index, reshape_iter *d)
4380 bool sized_array_p = (max_index != NULL_TREE);
4381 unsigned HOST_WIDE_INT max_index_cst = 0;
4382 unsigned HOST_WIDE_INT index;
4384 /* The initializer for an array is always a CONSTRUCTOR. */
4385 new_init = build_constructor (NULL_TREE, NULL);
4389 /* Minus 1 is used for zero sized arrays. */
4390 if (integer_all_onesp (max_index))
4393 if (host_integerp (max_index, 1))
4394 max_index_cst = tree_low_cst (max_index, 1);
4395 /* sizetype is sign extended, not zero extended. */
4397 max_index_cst = tree_low_cst (fold_convert (size_type_node, max_index),
4401 /* Loop until there are no more initializers. */
4403 d->cur != d->end && (!sized_array_p || index <= max_index_cst);
4408 check_array_designated_initializer (d->cur);
4409 elt_init = reshape_init_r (elt_type, d, /*first_initializer_p=*/false);
4410 if (elt_init == error_mark_node)
4411 return error_mark_node;
4412 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init), NULL_TREE, elt_init);
4418 /* Subroutine of reshape_init_r, processes the initializers for arrays.
4419 Parameters are the same of reshape_init_r. */
4422 reshape_init_array (tree type, reshape_iter *d)
4424 tree max_index = NULL_TREE;
4426 gcc_assert (TREE_CODE (type) == ARRAY_TYPE);
4428 if (TYPE_DOMAIN (type))
4429 max_index = array_type_nelts (type);
4431 return reshape_init_array_1 (TREE_TYPE (type), max_index, d);
4434 /* Subroutine of reshape_init_r, processes the initializers for vectors.
4435 Parameters are the same of reshape_init_r. */
4438 reshape_init_vector (tree type, reshape_iter *d)
4440 tree max_index = NULL_TREE;
4443 gcc_assert (TREE_CODE (type) == VECTOR_TYPE);
4445 if (COMPOUND_LITERAL_P (d->cur->value))
4447 tree value = d->cur->value;
4448 if (!same_type_p (TREE_TYPE (value), type))
4450 error ("invalid type %qT as initializer for a vector of type %qT",
4451 TREE_TYPE (d->cur->value), type);
4452 value = error_mark_node;
4458 /* For a vector, the representation type is a struct
4459 containing a single member which is an array of the
4460 appropriate size. */
4461 rtype = TYPE_DEBUG_REPRESENTATION_TYPE (type);
4462 if (rtype && TYPE_DOMAIN (TREE_TYPE (TYPE_FIELDS (rtype))))
4463 max_index = array_type_nelts (TREE_TYPE (TYPE_FIELDS (rtype)));
4465 return reshape_init_array_1 (TREE_TYPE (type), max_index, d);
4468 /* Subroutine of reshape_init_r, processes the initializers for classes
4469 or union. Parameters are the same of reshape_init_r. */
4472 reshape_init_class (tree type, reshape_iter *d, bool first_initializer_p)
4477 gcc_assert (CLASS_TYPE_P (type));
4479 /* The initializer for a class is always a CONSTRUCTOR. */
4480 new_init = build_constructor (NULL_TREE, NULL);
4481 field = next_initializable_field (TYPE_FIELDS (type));
4487 An initializer for an aggregate member that is an
4488 empty class shall have the form of an empty
4489 initializer-list {}. */
4490 if (!first_initializer_p)
4492 error ("initializer for %qT must be brace-enclosed", type);
4493 return error_mark_node;
4498 /* Loop through the initializable fields, gathering initializers. */
4499 while (d->cur != d->end)
4503 /* Handle designated initializers, as an extension. */
4506 field = lookup_field_1 (type, d->cur->index, /*want_type=*/false);
4508 if (!field || TREE_CODE (field) != FIELD_DECL)
4510 error ("%qT has no non-static data member named %qD", type,
4512 return error_mark_node;
4516 /* If we processed all the member of the class, we are done. */
4520 field_init = reshape_init_r (TREE_TYPE (field), d,
4521 /*first_initializer_p=*/false);
4522 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init), field, field_init);
4526 When a union is initialized with a brace-enclosed
4527 initializer, the braces shall only contain an
4528 initializer for the first member of the union. */
4529 if (TREE_CODE (type) == UNION_TYPE)
4532 field = next_initializable_field (TREE_CHAIN (field));
4538 /* Subroutine of reshape_init, which processes a single initializer (part of
4539 a CONSTRUCTOR). TYPE is the type of the variable being initialized, D is the
4540 iterator within the CONSTRUCTOR which points to the initializer to process.
4541 FIRST_INITIALIZER_P is true if this is the first initializer of the
4542 CONSTRUCTOR node. */
4545 reshape_init_r (tree type, reshape_iter *d, bool first_initializer_p)
4547 tree init = d->cur->value;
4549 /* A non-aggregate type is always initialized with a single
4551 if (!CP_AGGREGATE_TYPE_P (type))
4553 /* It is invalid to initialize a non-aggregate type with a
4554 brace-enclosed initializer.
4555 We need to check for BRACE_ENCLOSED_INITIALIZER_P here because
4556 of g++.old-deja/g++.mike/p7626.C: a pointer-to-member constant is
4557 a CONSTRUCTOR (with a record type). */
4558 if (TREE_CODE (init) == CONSTRUCTOR
4559 && BRACE_ENCLOSED_INITIALIZER_P (init)) /* p7626.C */
4561 error ("braces around scalar initializer for type %qT", type);
4562 init = error_mark_node;
4571 All implicit type conversions (clause _conv_) are considered when
4572 initializing the aggregate member with an initializer from an
4573 initializer-list. If the initializer can initialize a member,
4574 the member is initialized. Otherwise, if the member is itself a
4575 non-empty subaggregate, brace elision is assumed and the
4576 initializer is considered for the initialization of the first
4577 member of the subaggregate. */
4578 if (TREE_CODE (init) != CONSTRUCTOR
4579 && can_convert_arg (type, TREE_TYPE (init), init, LOOKUP_NORMAL))
4585 /* [dcl.init.string]
4587 A char array (whether plain char, signed char, or unsigned char)
4588 can be initialized by a string-literal (optionally enclosed in
4589 braces); a wchar_t array can be initialized by a wide
4590 string-literal (optionally enclosed in braces). */
4591 if (TREE_CODE (type) == ARRAY_TYPE
4592 && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type))))
4594 tree str_init = init;
4596 /* Strip one level of braces if and only if they enclose a single
4597 element (as allowed by [dcl.init.string]). */
4598 if (!first_initializer_p
4599 && TREE_CODE (str_init) == CONSTRUCTOR
4600 && VEC_length (constructor_elt, CONSTRUCTOR_ELTS (str_init)) == 1)
4602 str_init = VEC_index (constructor_elt,
4603 CONSTRUCTOR_ELTS (str_init), 0)->value;
4606 /* If it's a string literal, then it's the initializer for the array
4607 as a whole. Otherwise, continue with normal initialization for
4608 array types (one value per array element). */
4609 if (TREE_CODE (str_init) == STRING_CST)
4616 /* The following cases are about aggregates. If we are not within a full
4617 initializer already, and there is not a CONSTRUCTOR, it means that there
4618 is a missing set of braces (that is, we are processing the case for
4619 which reshape_init exists). */
4620 if (!first_initializer_p)
4622 if (TREE_CODE (init) == CONSTRUCTOR)
4624 /* For a nested compound literal, there is no need to reshape since
4625 brace elision is not allowed. Even if we decided to allow it,
4626 we should add a call to reshape_init in finish_compound_literal,
4627 before calling digest_init, so changing this code would still
4628 not be necessary. */
4629 if (!COMPOUND_LITERAL_P (init))
4632 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init));
4633 return reshape_init (type, init);
4636 gcc_assert (!BRACE_ENCLOSED_INITIALIZER_P (init));
4639 warning (OPT_Wmissing_braces, "missing braces around initializer for %qT",
4643 /* Dispatch to specialized routines. */
4644 if (CLASS_TYPE_P (type))
4645 return reshape_init_class (type, d, first_initializer_p);
4646 else if (TREE_CODE (type) == ARRAY_TYPE)
4647 return reshape_init_array (type, d);
4648 else if (TREE_CODE (type) == VECTOR_TYPE)
4649 return reshape_init_vector (type, d);
4654 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
4655 brace-enclosed aggregate initializer.
4657 INIT is the CONSTRUCTOR containing the list of initializers describing
4658 a brace-enclosed initializer for an entity of the indicated aggregate TYPE.
4659 It may not presently match the shape of the TYPE; for example:
4661 struct S { int a; int b; };
4662 struct S a[] = { 1, 2, 3, 4 };
4664 Here INIT will hold a VEC of four elements, rather than a
4665 VEC of two elements, each itself a VEC of two elements. This
4666 routine transforms INIT from the former form into the latter. The
4667 revised CONSTRUCTOR node is returned. */
4670 reshape_init (tree type, tree init)
4672 VEC(constructor_elt, gc) *v;
4676 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init));
4678 v = CONSTRUCTOR_ELTS (init);
4680 /* An empty constructor does not need reshaping, and it is always a valid
4682 if (VEC_empty (constructor_elt, v))
4685 /* Recurse on this CONSTRUCTOR. */
4686 d.cur = VEC_index (constructor_elt, v, 0);
4687 d.end = d.cur + VEC_length (constructor_elt, v);
4689 new_init = reshape_init_r (type, &d, true);
4690 if (new_init == error_mark_node)
4691 return error_mark_node;
4693 /* Make sure all the element of the constructor were used. Otherwise,
4694 issue an error about exceeding initializers. */
4696 error ("too many initializers for %qT", type);
4701 /* Verify INIT (the initializer for DECL), and record the
4702 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
4703 grok_reference_init.
4705 If the return value is non-NULL, it is an expression that must be
4706 evaluated dynamically to initialize DECL. */
4709 check_initializer (tree decl, tree init, int flags, tree *cleanup)
4711 tree type = TREE_TYPE (decl);
4712 tree init_code = NULL;
4714 /* Things that are going to be initialized need to have complete
4716 TREE_TYPE (decl) = type = complete_type (TREE_TYPE (decl));
4718 if (type == error_mark_node)
4719 /* We will have already complained. */
4722 if (TREE_CODE (type) == ARRAY_TYPE)
4724 tree element_type = TREE_TYPE (type);
4726 /* The array type itself need not be complete, because the
4727 initializer may tell us how many elements are in the array.
4728 But, the elements of the array must be complete. */
4729 if (!COMPLETE_TYPE_P (complete_type (element_type)))
4731 error ("elements of array %q#D have incomplete type", decl);
4734 /* It is not valid to initialize a VLA. */
4736 && ((COMPLETE_TYPE_P (type) && !TREE_CONSTANT (TYPE_SIZE (type)))
4737 || !TREE_CONSTANT (TYPE_SIZE (element_type))))
4739 error ("variable-sized object %qD may not be initialized", decl);
4743 else if (!COMPLETE_TYPE_P (type))
4745 error ("%qD has incomplete type", decl);
4746 TREE_TYPE (decl) = error_mark_node;
4750 /* There is no way to make a variable-sized class type in GNU C++. */
4751 gcc_assert (TREE_CONSTANT (TYPE_SIZE (type)));
4753 if (!CP_AGGREGATE_TYPE_P (type)
4754 && init && BRACE_ENCLOSED_INITIALIZER_P (init)
4755 && VEC_length (constructor_elt, CONSTRUCTOR_ELTS (init)) != 1)
4757 error ("scalar object %qD requires one element in initializer", decl);
4758 TREE_TYPE (decl) = error_mark_node;
4762 if (TREE_CODE (decl) == CONST_DECL)
4764 gcc_assert (TREE_CODE (type) != REFERENCE_TYPE);
4766 DECL_INITIAL (decl) = init;
4768 gcc_assert (init != NULL_TREE);
4771 else if (!DECL_EXTERNAL (decl) && TREE_CODE (type) == REFERENCE_TYPE)
4772 init = grok_reference_init (decl, type, init, cleanup);
4775 /* Do not reshape constructors of vectors (they don't need to be
4777 if (TREE_CODE (init) == CONSTRUCTOR
4778 && !COMPOUND_LITERAL_P (init)
4779 && !TREE_TYPE (init)) /* ptrmemfunc */
4781 init = reshape_init (type, init);
4783 if ((*targetm.vector_opaque_p) (type))
4785 error ("opaque vector types cannot be initialized");
4786 init = error_mark_node;
4790 /* If DECL has an array type without a specific bound, deduce the
4791 array size from the initializer. */
4792 maybe_deduce_size_from_array_init (decl, init);
4793 type = TREE_TYPE (decl);
4794 if (type == error_mark_node)
4797 if (TYPE_HAS_CONSTRUCTOR (type) || TYPE_NEEDS_CONSTRUCTING (type))
4799 if (TREE_CODE (type) == ARRAY_TYPE)
4800 goto initialize_aggr;
4801 else if (TREE_CODE (init) == CONSTRUCTOR)
4803 if (TYPE_NON_AGGREGATE_CLASS (type))
4805 error ("%qD must be initialized by constructor, "
4808 init = error_mark_node;
4811 goto dont_use_constructor;
4815 int saved_stmts_are_full_exprs_p;
4818 saved_stmts_are_full_exprs_p = 0;
4819 if (building_stmt_tree ())
4821 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
4822 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
4824 init = build_aggr_init (decl, init, flags);
4825 if (building_stmt_tree ())
4826 current_stmt_tree ()->stmts_are_full_exprs_p =
4827 saved_stmts_are_full_exprs_p;
4833 dont_use_constructor:
4834 if (TREE_CODE (init) != TREE_VEC)
4836 init_code = store_init_value (decl, init);
4837 if (pedantic && TREE_CODE (type) == ARRAY_TYPE
4838 && DECL_INITIAL (decl)
4839 && TREE_CODE (DECL_INITIAL (decl)) == STRING_CST
4840 && PAREN_STRING_LITERAL_P (DECL_INITIAL (decl)))
4841 warning (0, "array %qD initialized by parenthesized string literal %qE",
4842 decl, DECL_INITIAL (decl));
4847 else if (DECL_EXTERNAL (decl))
4849 else if (TYPE_P (type) && TYPE_NEEDS_CONSTRUCTING (type))
4850 goto initialize_aggr;
4851 else if (IS_AGGR_TYPE (type))
4853 tree core_type = strip_array_types (type);
4855 if (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type))
4856 error ("structure %qD with uninitialized const members", decl);
4857 if (CLASSTYPE_REF_FIELDS_NEED_INIT (core_type))
4858 error ("structure %qD with uninitialized reference members", decl);
4860 check_for_uninitialized_const_var (decl);
4863 check_for_uninitialized_const_var (decl);
4865 if (init && init != error_mark_node)
4866 init_code = build2 (INIT_EXPR, type, decl, init);
4871 /* If DECL is not a local variable, give it RTL. */
4874 make_rtl_for_nonlocal_decl (tree decl, tree init, const char* asmspec)
4876 int toplev = toplevel_bindings_p ();
4878 const char *filename;
4880 /* Set the DECL_ASSEMBLER_NAME for the object. */
4883 /* The `register' keyword, when used together with an
4884 asm-specification, indicates that the variable should be
4885 placed in a particular register. */
4886 if (TREE_CODE (decl) == VAR_DECL && DECL_REGISTER (decl))
4888 set_user_assembler_name (decl, asmspec);
4889 DECL_HARD_REGISTER (decl) = 1;
4893 if (TREE_CODE (decl) == FUNCTION_DECL
4894 && DECL_BUILT_IN_CLASS (decl) == BUILT_IN_NORMAL)
4895 set_builtin_user_assembler_name (decl, asmspec);
4896 set_user_assembler_name (decl, asmspec);
4900 /* Handle non-variables up front. */
4901 if (TREE_CODE (decl) != VAR_DECL)
4903 rest_of_decl_compilation (decl, toplev, at_eof);
4907 /* If we see a class member here, it should be a static data
4909 if (DECL_LANG_SPECIFIC (decl) && DECL_IN_AGGR_P (decl))
4911 gcc_assert (TREE_STATIC (decl));
4912 /* An in-class declaration of a static data member should be
4913 external; it is only a declaration, and not a definition. */
4914 if (init == NULL_TREE)
4915 gcc_assert (DECL_EXTERNAL (decl));
4918 /* We don't create any RTL for local variables. */
4919 if (DECL_FUNCTION_SCOPE_P (decl) && !TREE_STATIC (decl))
4922 /* We defer emission of local statics until the corresponding
4923 DECL_EXPR is expanded. */
4924 defer_p = DECL_FUNCTION_SCOPE_P (decl) || DECL_VIRTUAL_P (decl);
4926 /* We try to defer namespace-scope static constants so that they are
4927 not emitted into the object file unnecessarily. */
4928 filename = input_filename;
4929 if (!DECL_VIRTUAL_P (decl)
4930 && TREE_READONLY (decl)
4931 && DECL_INITIAL (decl) != NULL_TREE
4932 && DECL_INITIAL (decl) != error_mark_node
4934 && ! EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl))
4936 && !TREE_PUBLIC (decl))
4938 /* Fool with the linkage of static consts according to #pragma
4940 struct c_fileinfo *finfo = get_fileinfo (filename);
4941 if (!finfo->interface_unknown && !TREE_PUBLIC (decl))
4943 TREE_PUBLIC (decl) = 1;
4944 DECL_EXTERNAL (decl) = finfo->interface_only;
4949 /* Likewise for template instantiations. */
4950 else if (DECL_LANG_SPECIFIC (decl)
4951 && DECL_IMPLICIT_INSTANTIATION (decl))
4954 /* If we're not deferring, go ahead and assemble the variable. */
4956 rest_of_decl_compilation (decl, toplev, at_eof);
4959 /* Generate code to initialize DECL (a local variable). */
4962 initialize_local_var (tree decl, tree init)
4964 tree type = TREE_TYPE (decl);
4967 gcc_assert (TREE_CODE (decl) == VAR_DECL
4968 || TREE_CODE (decl) == RESULT_DECL);
4969 gcc_assert (!TREE_STATIC (decl));
4971 if (DECL_SIZE (decl) == NULL_TREE)
4973 /* If we used it already as memory, it must stay in memory. */
4974 DECL_INITIAL (decl) = NULL_TREE;
4975 TREE_ADDRESSABLE (decl) = TREE_USED (decl);
4978 if (DECL_SIZE (decl) && type != error_mark_node)
4982 /* Compute and store the initial value. */
4983 already_used = TREE_USED (decl) || TREE_USED (type);
4985 /* Perform the initialization. */
4988 int saved_stmts_are_full_exprs_p;
4990 gcc_assert (building_stmt_tree ());
4991 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
4992 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
4993 finish_expr_stmt (init);
4994 current_stmt_tree ()->stmts_are_full_exprs_p =
4995 saved_stmts_are_full_exprs_p;
4998 /* Set this to 0 so we can tell whether an aggregate which was
4999 initialized was ever used. Don't do this if it has a
5000 destructor, so we don't complain about the 'resource
5001 allocation is initialization' idiom. Now set
5002 attribute((unused)) on types so decls of that type will be
5003 marked used. (see TREE_USED, above.) */
5004 if (TYPE_NEEDS_CONSTRUCTING (type)
5006 && TYPE_HAS_TRIVIAL_DESTRUCTOR (type)
5007 && DECL_NAME (decl))
5008 TREE_USED (decl) = 0;
5009 else if (already_used)
5010 TREE_USED (decl) = 1;
5013 /* Generate a cleanup, if necessary. */
5014 cleanup = cxx_maybe_build_cleanup (decl);
5015 if (DECL_SIZE (decl) && cleanup)
5016 finish_decl_cleanup (decl, cleanup);
5019 /* DECL is a VAR_DECL for a compiler-generated variable with static
5020 storage duration (like a virtual table) whose initializer is a
5021 compile-time constant. INIT must be either a TREE_LIST of values,
5022 or a CONSTRUCTOR. Initialize the variable and provide it to the
5026 initialize_artificial_var (tree decl, tree init)
5028 gcc_assert (DECL_ARTIFICIAL (decl));
5029 if (TREE_CODE (init) == TREE_LIST)
5030 init = build_constructor_from_list (NULL_TREE, init);
5031 gcc_assert (TREE_CODE (init) == CONSTRUCTOR);
5032 DECL_INITIAL (decl) = init;
5033 DECL_INITIALIZED_P (decl) = 1;
5034 determine_visibility (decl);
5035 layout_var_decl (decl);
5036 maybe_commonize_var (decl);
5037 make_rtl_for_nonlocal_decl (decl, init, /*asmspec=*/NULL);
5040 /* Finish processing of a declaration;
5041 install its line number and initial value.
5042 If the length of an array type is not known before,
5043 it must be determined now, from the initial value, or it is an error.
5045 INIT is the initializer (if any) for DECL. If INIT_CONST_EXPR_P is
5046 true, then INIT is an integral constant expression.
5048 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
5049 if the (init) syntax was used. */
5052 cp_finish_decl (tree decl, tree init, bool init_const_expr_p,
5053 tree asmspec_tree, int flags)
5057 const char *asmspec = NULL;
5058 int was_readonly = 0;
5059 bool var_definition_p = false;
5060 int saved_processing_template_decl;
5062 if (decl == error_mark_node)
5067 error ("assignment (not initialization) in declaration");
5071 gcc_assert (TREE_CODE (decl) != RESULT_DECL);
5072 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
5073 gcc_assert (TREE_CODE (decl) != PARM_DECL);
5075 type = TREE_TYPE (decl);
5076 if (type == error_mark_node)
5079 /* Assume no cleanup is required. */
5080 cleanup = NULL_TREE;
5081 saved_processing_template_decl = processing_template_decl;
5083 /* If a name was specified, get the string. */
5084 if (global_scope_p (current_binding_level))
5085 asmspec_tree = maybe_apply_renaming_pragma (decl, asmspec_tree);
5086 if (asmspec_tree && asmspec_tree != error_mark_node)
5087 asmspec = TREE_STRING_POINTER (asmspec_tree);
5089 if (current_class_type
5090 && CP_DECL_CONTEXT (decl) == current_class_type
5091 && TYPE_BEING_DEFINED (current_class_type)
5092 && (DECL_INITIAL (decl) || init))
5093 DECL_INITIALIZED_IN_CLASS_P (decl) = 1;
5095 if (processing_template_decl)
5097 bool type_dependent_p;
5099 /* Add this declaration to the statement-tree. */
5100 if (at_function_scope_p ())
5101 add_decl_expr (decl);
5103 type_dependent_p = dependent_type_p (type);
5105 if (init && init_const_expr_p)
5107 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl) = 1;
5108 if (DECL_INTEGRAL_CONSTANT_VAR_P (decl))
5109 TREE_CONSTANT (decl) = 1;
5113 || !DECL_CLASS_SCOPE_P (decl)
5114 || !DECL_INTEGRAL_CONSTANT_VAR_P (decl)
5116 || value_dependent_expression_p (init)
5117 /* Check also if initializer is a value dependent
5118 { integral_constant_expression }. */
5119 || (TREE_CODE (init) == CONSTRUCTOR
5120 && VEC_length (constructor_elt, CONSTRUCTOR_ELTS (init)) == 1
5121 && value_dependent_expression_p
5122 (VEC_index (constructor_elt,
5123 CONSTRUCTOR_ELTS (init), 0)->value)))
5126 DECL_INITIAL (decl) = init;
5127 if (TREE_CODE (decl) == VAR_DECL
5128 && !DECL_PRETTY_FUNCTION_P (decl)
5129 && !type_dependent_p)
5130 maybe_deduce_size_from_array_init (decl, init);
5134 init = fold_non_dependent_expr (init);
5135 processing_template_decl = 0;
5138 /* Take care of TYPE_DECLs up front. */
5139 if (TREE_CODE (decl) == TYPE_DECL)
5141 if (type != error_mark_node
5142 && IS_AGGR_TYPE (type) && DECL_NAME (decl))
5144 if (TREE_TYPE (DECL_NAME (decl)) && TREE_TYPE (decl) != type)
5145 warning (0, "shadowing previous type declaration of %q#D", decl);
5146 set_identifier_type_value (DECL_NAME (decl), decl);
5149 /* If we have installed this as the canonical typedef for this
5150 type, and that type has not been defined yet, delay emitting
5151 the debug information for it, as we will emit it later. */
5152 if (TYPE_MAIN_DECL (TREE_TYPE (decl)) == decl
5153 && !COMPLETE_TYPE_P (TREE_TYPE (decl)))
5154 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
5156 rest_of_decl_compilation (decl, DECL_CONTEXT (decl) == NULL_TREE,
5161 /* A reference will be modified here, as it is initialized. */
5162 if (! DECL_EXTERNAL (decl)
5163 && TREE_READONLY (decl)
5164 && TREE_CODE (type) == REFERENCE_TYPE)
5167 TREE_READONLY (decl) = 0;
5170 if (TREE_CODE (decl) == VAR_DECL)
5172 /* Only PODs can have thread-local storage. Other types may require
5173 various kinds of non-trivial initialization. */
5174 if (DECL_THREAD_LOCAL_P (decl) && !pod_type_p (TREE_TYPE (decl)))
5175 error ("%qD cannot be thread-local because it has non-POD type %qT",
5176 decl, TREE_TYPE (decl));
5177 /* If this is a local variable that will need a mangled name,
5178 register it now. We must do this before processing the
5179 initializer for the variable, since the initialization might
5180 require a guard variable, and since the mangled name of the
5181 guard variable will depend on the mangled name of this
5183 if (!processing_template_decl
5184 && DECL_FUNCTION_SCOPE_P (decl)
5185 && TREE_STATIC (decl)
5186 && !DECL_ARTIFICIAL (decl))
5187 push_local_name (decl);
5188 /* Convert the initializer to the type of DECL, if we have not
5189 already initialized DECL. */
5190 if (!DECL_INITIALIZED_P (decl)
5191 /* If !DECL_EXTERNAL then DECL is being defined. In the
5192 case of a static data member initialized inside the
5193 class-specifier, there can be an initializer even if DECL
5194 is *not* defined. */
5195 && (!DECL_EXTERNAL (decl) || init))
5199 DECL_NONTRIVIALLY_INITIALIZED_P (decl) = 1;
5200 if (init_const_expr_p)
5202 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl) = 1;
5203 if (DECL_INTEGRAL_CONSTANT_VAR_P (decl))
5204 TREE_CONSTANT (decl) = 1;
5207 init = check_initializer (decl, init, flags, &cleanup);
5208 /* Thread-local storage cannot be dynamically initialized. */
5209 if (DECL_THREAD_LOCAL_P (decl) && init)
5211 error ("%qD is thread-local and so cannot be dynamically "
5212 "initialized", decl);
5216 /* Check that the initializer for a static data member was a
5217 constant. Although we check in the parser that the
5218 initializer is an integral constant expression, we do not
5219 simplify division-by-zero at the point at which it
5220 occurs. Therefore, in:
5222 struct S { static const int i = 7 / 0; };
5224 we issue an error at this point. It would
5225 probably be better to forbid division by zero in
5226 integral constant expressions. */
5227 if (DECL_EXTERNAL (decl) && init)
5229 error ("%qD cannot be initialized by a non-constant expression"
5230 " when being declared", decl);
5231 DECL_INITIALIZED_IN_CLASS_P (decl) = 0;
5239 The memory occupied by any object of static storage
5240 duration is zero-initialized at program startup before
5241 any other initialization takes place.
5243 We cannot create an appropriate initializer until after
5244 the type of DECL is finalized. If DECL_INITIAL is set,
5245 then the DECL is statically initialized, and any
5246 necessary zero-initialization has already been performed. */
5247 if (TREE_STATIC (decl) && !DECL_INITIAL (decl))
5248 DECL_INITIAL (decl) = build_zero_init (TREE_TYPE (decl),
5249 /*nelts=*/NULL_TREE,
5250 /*static_storage_p=*/true);
5251 /* Remember that the initialization for this variable has
5253 DECL_INITIALIZED_P (decl) = 1;
5254 /* This declaration is the definition of this variable,
5255 unless we are initializing a static data member within
5256 the class specifier. */
5257 if (!DECL_EXTERNAL (decl))
5258 var_definition_p = true;
5260 /* If the variable has an array type, lay out the type, even if
5261 there is no initializer. It is valid to index through the
5262 array, and we must get TYPE_ALIGN set correctly on the array
5264 else if (TREE_CODE (type) == ARRAY_TYPE)
5268 /* Add this declaration to the statement-tree. This needs to happen
5269 after the call to check_initializer so that the DECL_EXPR for a
5270 reference temp is added before the DECL_EXPR for the reference itself. */
5271 if (at_function_scope_p ())
5272 add_decl_expr (decl);
5274 /* Let the middle end know about variables and functions -- but not
5275 static data members in uninstantiated class templates. */
5276 if (!saved_processing_template_decl
5277 && (TREE_CODE (decl) == VAR_DECL
5278 || TREE_CODE (decl) == FUNCTION_DECL))
5280 if (TREE_CODE (decl) == VAR_DECL)
5282 layout_var_decl (decl);
5283 maybe_commonize_var (decl);
5284 if (DECL_NAMESPACE_SCOPE_P (decl) && !TREE_PUBLIC (decl)
5285 && !DECL_THIS_STATIC (decl) && !DECL_ARTIFICIAL (decl))
5287 /* This is a const variable with implicit 'static'. Set
5288 DECL_THIS_STATIC so we can tell it from variables that are
5289 !TREE_PUBLIC because of the anonymous namespace. */
5290 DECL_THIS_STATIC (decl) = 1;
5294 make_rtl_for_nonlocal_decl (decl, init, asmspec);
5296 /* Check for abstractness of the type. Notice that there is no
5297 need to strip array types here since the check for those types
5298 is already done within create_array_type_for_decl. */
5299 if (TREE_CODE (type) == FUNCTION_TYPE
5300 || TREE_CODE (type) == METHOD_TYPE)
5301 abstract_virtuals_error (decl, TREE_TYPE (type));
5303 abstract_virtuals_error (decl, type);
5305 /* This needs to happen after the linkage is set. */
5306 determine_visibility (decl);
5308 if (TREE_CODE (decl) == FUNCTION_DECL
5309 || TREE_TYPE (decl) == error_mark_node)
5310 /* No initialization required. */
5312 else if (DECL_EXTERNAL (decl)
5313 && ! (DECL_LANG_SPECIFIC (decl)
5314 && DECL_NOT_REALLY_EXTERN (decl)))
5317 DECL_INITIAL (decl) = init;
5321 /* A variable definition. */
5322 if (DECL_FUNCTION_SCOPE_P (decl))
5324 /* Initialize the local variable. */
5325 if (processing_template_decl)
5326 DECL_INITIAL (decl) = init;
5327 else if (!TREE_STATIC (decl))
5328 initialize_local_var (decl, init);
5331 /* If a variable is defined, and then a subsequent
5332 definition with external linkage is encountered, we will
5333 get here twice for the same variable. We want to avoid
5334 calling expand_static_init more than once. For variables
5335 that are not static data members, we can call
5336 expand_static_init only when we actually process the
5337 initializer. It is not legal to redeclare a static data
5338 member, so this issue does not arise in that case. */
5339 if (var_definition_p && TREE_STATIC (decl))
5340 expand_static_init (decl, init);
5344 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
5345 reference, insert it in the statement-tree now. */
5347 push_cleanup (decl, cleanup, false);
5350 processing_template_decl = saved_processing_template_decl;
5353 TREE_READONLY (decl) = 1;
5355 /* If this was marked 'used', be sure it will be output. */
5356 if (lookup_attribute ("used", DECL_ATTRIBUTES (decl)))
5357 mark_decl_referenced (decl);
5360 /* This is here for a midend callback from c-common.c. */
5363 finish_decl (tree decl, tree init, tree asmspec_tree)
5365 cp_finish_decl (decl, init, /*init_const_expr_p=*/false, asmspec_tree, 0);
5368 /* Returns a declaration for a VAR_DECL as if:
5370 extern "C" TYPE NAME;
5372 had been seen. Used to create compiler-generated global
5376 declare_global_var (tree name, tree type)
5380 push_to_top_level ();
5381 decl = build_decl (VAR_DECL, name, type);
5382 TREE_PUBLIC (decl) = 1;
5383 DECL_EXTERNAL (decl) = 1;
5384 DECL_ARTIFICIAL (decl) = 1;
5385 /* If the user has explicitly declared this variable (perhaps
5386 because the code we are compiling is part of a low-level runtime
5387 library), then it is possible that our declaration will be merged
5388 with theirs by pushdecl. */
5389 decl = pushdecl (decl);
5390 finish_decl (decl, NULL_TREE, NULL_TREE);
5391 pop_from_top_level ();
5396 /* Returns a pointer to the `atexit' function. Note that if
5397 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
5398 `__cxa_atexit' function specified in the IA64 C++ ABI. */
5401 get_atexit_node (void)
5408 bool use_aeabi_atexit;
5413 if (flag_use_cxa_atexit && !targetm.cxx.use_atexit_for_cxa_atexit ())
5415 /* The declaration for `__cxa_atexit' is:
5417 int __cxa_atexit (void (*)(void *), void *, void *)
5419 We build up the argument types and then then function type
5422 use_aeabi_atexit = targetm.cxx.use_aeabi_atexit ();
5423 /* First, build the pointer-to-function type for the first
5425 arg_types = tree_cons (NULL_TREE, ptr_type_node, void_list_node);
5426 fn_type = build_function_type (void_type_node, arg_types);
5427 fn_ptr_type = build_pointer_type (fn_type);
5428 /* Then, build the rest of the argument types. */
5429 arg_types = tree_cons (NULL_TREE, ptr_type_node, void_list_node);
5430 if (use_aeabi_atexit)
5432 arg_types = tree_cons (NULL_TREE, fn_ptr_type, arg_types);
5433 arg_types = tree_cons (NULL_TREE, ptr_type_node, arg_types);
5437 arg_types = tree_cons (NULL_TREE, ptr_type_node, arg_types);
5438 arg_types = tree_cons (NULL_TREE, fn_ptr_type, arg_types);
5440 /* And the final __cxa_atexit type. */
5441 fn_type = build_function_type (integer_type_node, arg_types);
5442 fn_ptr_type = build_pointer_type (fn_type);
5443 if (use_aeabi_atexit)
5444 name = "__aeabi_atexit";
5446 name = "__cxa_atexit";
5450 /* The declaration for `atexit' is:
5452 int atexit (void (*)());
5454 We build up the argument types and then then function type
5456 fn_type = build_function_type (void_type_node, void_list_node);
5457 fn_ptr_type = build_pointer_type (fn_type);
5458 arg_types = tree_cons (NULL_TREE, fn_ptr_type, void_list_node);
5459 /* Build the final atexit type. */
5460 fn_type = build_function_type (integer_type_node, arg_types);
5464 /* Now, build the function declaration. */
5465 push_lang_context (lang_name_c);
5466 atexit_fndecl = build_library_fn_ptr (name, fn_type);
5467 mark_used (atexit_fndecl);
5468 pop_lang_context ();
5469 atexit_node = decay_conversion (atexit_fndecl);
5474 /* Returns the __dso_handle VAR_DECL. */
5477 get_dso_handle_node (void)
5479 if (dso_handle_node)
5480 return dso_handle_node;
5482 /* Declare the variable. */
5483 dso_handle_node = declare_global_var (get_identifier ("__dso_handle"),
5486 return dso_handle_node;
5489 /* Begin a new function with internal linkage whose job will be simply
5490 to destroy some particular variable. */
5492 static GTY(()) int start_cleanup_cnt;
5495 start_cleanup_fn (void)
5501 bool use_cxa_atexit = flag_use_cxa_atexit
5502 && !targetm.cxx.use_atexit_for_cxa_atexit ();
5504 push_to_top_level ();
5506 /* No need to mangle this. */
5507 push_lang_context (lang_name_c);
5509 /* Build the parameter-types. */
5510 parmtypes = void_list_node;
5511 /* Functions passed to __cxa_atexit take an additional parameter.
5512 We'll just ignore it. After we implement the new calling
5513 convention for destructors, we can eliminate the use of
5514 additional cleanup functions entirely in the -fnew-abi case. */
5516 parmtypes = tree_cons (NULL_TREE, ptr_type_node, parmtypes);
5517 /* Build the function type itself. */
5518 fntype = build_function_type (void_type_node, parmtypes);
5519 /* Build the name of the function. */
5520 sprintf (name, "__tcf_%d", start_cleanup_cnt++);
5521 /* Build the function declaration. */
5522 fndecl = build_lang_decl (FUNCTION_DECL, get_identifier (name), fntype);
5523 /* It's a function with internal linkage, generated by the
5525 TREE_PUBLIC (fndecl) = 0;
5526 DECL_ARTIFICIAL (fndecl) = 1;
5527 /* Make the function `inline' so that it is only emitted if it is
5528 actually needed. It is unlikely that it will be inlined, since
5529 it is only called via a function pointer, but we avoid unnecessary
5530 emissions this way. */
5531 DECL_INLINE (fndecl) = 1;
5532 DECL_DECLARED_INLINE_P (fndecl) = 1;
5533 DECL_INTERFACE_KNOWN (fndecl) = 1;
5534 /* Build the parameter. */
5539 parmdecl = cp_build_parm_decl (NULL_TREE, ptr_type_node);
5540 DECL_CONTEXT (parmdecl) = fndecl;
5541 TREE_USED (parmdecl) = 1;
5542 DECL_ARGUMENTS (fndecl) = parmdecl;
5546 start_preparsed_function (fndecl, NULL_TREE, SF_PRE_PARSED);
5548 pop_lang_context ();
5550 return current_function_decl;
5553 /* Finish the cleanup function begun by start_cleanup_fn. */
5556 end_cleanup_fn (void)
5558 expand_or_defer_fn (finish_function (0));
5560 pop_from_top_level ();
5563 /* Generate code to handle the destruction of DECL, an object with
5564 static storage duration. */
5567 register_dtor_fn (tree decl)
5574 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
5575 return void_zero_node;
5577 /* Call build_cleanup before we enter the anonymous function so that
5578 any access checks will be done relative to the current scope,
5579 rather than the scope of the anonymous function. */
5580 build_cleanup (decl);
5582 /* Now start the function. */
5583 cleanup = start_cleanup_fn ();
5585 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
5586 to the original function, rather than the anonymous one. That
5587 will make the back end think that nested functions are in use,
5588 which causes confusion. */
5590 push_deferring_access_checks (dk_no_check);
5591 fcall = build_cleanup (decl);
5592 pop_deferring_access_checks ();
5594 /* Create the body of the anonymous function. */
5595 compound_stmt = begin_compound_stmt (BCS_FN_BODY);
5596 finish_expr_stmt (fcall);
5597 finish_compound_stmt (compound_stmt);
5600 /* Call atexit with the cleanup function. */
5601 cxx_mark_addressable (cleanup);
5602 mark_used (cleanup);
5603 cleanup = build_unary_op (ADDR_EXPR, cleanup, 0);
5604 if (flag_use_cxa_atexit && !targetm.cxx.use_atexit_for_cxa_atexit ())
5606 args = tree_cons (NULL_TREE,
5607 build_unary_op (ADDR_EXPR, get_dso_handle_node (), 0),
5609 if (targetm.cxx.use_aeabi_atexit ())
5611 args = tree_cons (NULL_TREE, cleanup, args);
5612 args = tree_cons (NULL_TREE, null_pointer_node, args);
5616 args = tree_cons (NULL_TREE, null_pointer_node, args);
5617 args = tree_cons (NULL_TREE, cleanup, args);
5621 args = tree_cons (NULL_TREE, cleanup, NULL_TREE);
5622 return build_function_call (get_atexit_node (), args);
5625 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
5626 is its initializer. Generate code to handle the construction
5627 and destruction of DECL. */
5630 expand_static_init (tree decl, tree init)
5632 gcc_assert (TREE_CODE (decl) == VAR_DECL);
5633 gcc_assert (TREE_STATIC (decl));
5635 /* Some variables require no initialization. */
5637 && !TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl))
5638 && TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
5641 if (DECL_FUNCTION_SCOPE_P (decl))
5643 /* Emit code to perform this initialization but once. */
5644 tree if_stmt = NULL_TREE, inner_if_stmt = NULL_TREE;
5645 tree then_clause = NULL_TREE, inner_then_clause = NULL_TREE;
5646 tree guard, guard_addr;
5647 tree acquire_fn, release_fn, abort_fn;
5650 /* Emit code to perform this initialization but once. This code
5653 static <type> guard;
5654 if (!guard.first_byte) {
5655 if (__cxa_guard_acquire (&guard)) {
5658 // Do initialization.
5659 flag = true; __cxa_guard_release (&guard);
5660 // Register variable for destruction at end of program.
5662 if (!flag) __cxa_guard_abort (&guard);
5666 Note that the `flag' variable is only set to 1 *after* the
5667 initialization is complete. This ensures that an exception,
5668 thrown during the construction, will cause the variable to
5669 reinitialized when we pass through this code again, as per:
5673 If the initialization exits by throwing an exception, the
5674 initialization is not complete, so it will be tried again
5675 the next time control enters the declaration.
5677 This process should be thread-safe, too; multiple threads
5678 should not be able to initialize the variable more than
5681 /* Create the guard variable. */
5682 guard = get_guard (decl);
5684 /* This optimization isn't safe on targets with relaxed memory
5685 consistency. On such targets we force synchronization in
5686 __cxa_guard_acquire. */
5687 if (!targetm.relaxed_ordering || !flag_threadsafe_statics)
5689 /* Begin the conditional initialization. */
5690 if_stmt = begin_if_stmt ();
5691 finish_if_stmt_cond (get_guard_cond (guard), if_stmt);
5692 then_clause = begin_compound_stmt (BCS_NO_SCOPE);
5695 if (flag_threadsafe_statics)
5697 guard_addr = build_address (guard);
5699 acquire_fn = get_identifier ("__cxa_guard_acquire");
5700 release_fn = get_identifier ("__cxa_guard_release");
5701 abort_fn = get_identifier ("__cxa_guard_abort");
5702 if (!get_global_value_if_present (acquire_fn, &acquire_fn))
5704 tree argtypes = tree_cons (NULL_TREE, TREE_TYPE (guard_addr),
5706 tree vfntype = build_function_type (void_type_node, argtypes);
5707 acquire_fn = push_library_fn
5708 (acquire_fn, build_function_type (integer_type_node, argtypes));
5709 release_fn = push_library_fn (release_fn, vfntype);
5710 abort_fn = push_library_fn (abort_fn, vfntype);
5714 release_fn = identifier_global_value (release_fn);
5715 abort_fn = identifier_global_value (abort_fn);
5718 inner_if_stmt = begin_if_stmt ();
5719 finish_if_stmt_cond (build_call_n (acquire_fn, 1, guard_addr),
5722 inner_then_clause = begin_compound_stmt (BCS_NO_SCOPE);
5723 begin = get_target_expr (boolean_false_node);
5724 flag = TARGET_EXPR_SLOT (begin);
5726 TARGET_EXPR_CLEANUP (begin)
5727 = build3 (COND_EXPR, void_type_node, flag,
5729 build_call_n (abort_fn, 1, guard_addr));
5730 CLEANUP_EH_ONLY (begin) = 1;
5732 /* Do the initialization itself. */
5733 init = add_stmt_to_compound (begin, init);
5734 init = add_stmt_to_compound
5735 (init, build2 (MODIFY_EXPR, void_type_node, flag, boolean_true_node));
5736 init = add_stmt_to_compound
5737 (init, build_call_n (release_fn, 1, guard_addr));
5740 init = add_stmt_to_compound (init, set_guard (guard));
5742 /* Use atexit to register a function for destroying this static
5744 init = add_stmt_to_compound (init, register_dtor_fn (decl));
5746 finish_expr_stmt (init);
5748 if (flag_threadsafe_statics)
5750 finish_compound_stmt (inner_then_clause);
5751 finish_then_clause (inner_if_stmt);
5752 finish_if_stmt (inner_if_stmt);
5755 if (!targetm.relaxed_ordering || !flag_threadsafe_statics)
5757 finish_compound_stmt (then_clause);
5758 finish_then_clause (if_stmt);
5759 finish_if_stmt (if_stmt);
5763 static_aggregates = tree_cons (init, decl, static_aggregates);
5767 /* Make TYPE a complete type based on INITIAL_VALUE.
5768 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
5769 2 if there was no information (in which case assume 0 if DO_DEFAULT),
5770 3 if the initializer list is empty (in pedantic mode). */
5773 cp_complete_array_type (tree *ptype, tree initial_value, bool do_default)
5776 tree type, elt_type;
5780 /* An array of character type can be initialized from a
5781 brace-enclosed string constant.
5783 FIXME: this code is duplicated from reshape_init. Probably
5784 we should just call reshape_init here? */
5785 if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (*ptype)))
5786 && TREE_CODE (initial_value) == CONSTRUCTOR
5787 && !VEC_empty (constructor_elt, CONSTRUCTOR_ELTS (initial_value)))
5789 VEC(constructor_elt,gc) *v = CONSTRUCTOR_ELTS (initial_value);
5790 tree value = VEC_index (constructor_elt, v, 0)->value;
5792 if (TREE_CODE (value) == STRING_CST
5793 && VEC_length (constructor_elt, v) == 1)
5794 initial_value = value;
5798 failure = complete_array_type (ptype, initial_value, do_default);
5800 /* We can create the array before the element type is complete, which
5801 means that we didn't have these two bits set in the original type
5802 either. In completing the type, we are expected to propagate these
5803 bits. See also complete_type which does the same thing for arrays
5806 if (TYPE_DOMAIN (type))
5808 elt_type = TREE_TYPE (type);
5809 TYPE_NEEDS_CONSTRUCTING (type) = TYPE_NEEDS_CONSTRUCTING (elt_type);
5810 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type)
5811 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (elt_type);
5817 /* Return zero if something is declared to be a member of type
5818 CTYPE when in the context of CUR_TYPE. STRING is the error
5819 message to print in that case. Otherwise, quietly return 1. */
5822 member_function_or_else (tree ctype, tree cur_type, enum overload_flags flags)
5824 if (ctype && ctype != cur_type)
5826 if (flags == DTOR_FLAG)
5827 error ("destructor for alien class %qT cannot be a member", ctype);
5829 error ("constructor for alien class %qT cannot be a member", ctype);
5835 /* Subroutine of `grokdeclarator'. */
5837 /* Generate errors possibly applicable for a given set of specifiers.
5838 This is for ARM $7.1.2. */
5841 bad_specifiers (tree object,
5850 error ("%qD declared as a %<virtual%> %s", object, type);
5852 error ("%qD declared as an %<inline%> %s", object, type);
5854 error ("%<const%> and %<volatile%> function specifiers on "
5855 "%qD invalid in %s declaration",
5858 error ("%q+D declared as a friend", object);
5860 && (TREE_CODE (object) == TYPE_DECL
5861 || (!TYPE_PTRFN_P (TREE_TYPE (object))
5862 && !TYPE_REFFN_P (TREE_TYPE (object))
5863 && !TYPE_PTRMEMFUNC_P (TREE_TYPE (object)))))
5864 error ("%q+D declared with an exception specification", object);
5867 /* DECL is a member function or static data member and is presently
5868 being defined. Check that the definition is taking place in a
5872 check_class_member_definition_namespace (tree decl)
5874 /* These checks only apply to member functions and static data
5876 gcc_assert (TREE_CODE (decl) == FUNCTION_DECL
5877 || TREE_CODE (decl) == VAR_DECL);
5878 /* We check for problems with specializations in pt.c in
5879 check_specialization_namespace, where we can issue better
5881 if (processing_specialization)
5883 /* There are no restrictions on the placement of
5884 explicit instantiations. */
5885 if (processing_explicit_instantiation)
5889 A member function definition that appears outside of the
5890 class definition shall appear in a namespace scope enclosing
5891 the class definition.
5895 The definition for a static data member shall appear in a
5896 namespace scope enclosing the member's class definition. */
5897 if (!is_ancestor (current_namespace, DECL_CONTEXT (decl)))
5898 pedwarn ("definition of %qD is not in namespace enclosing %qT",
5899 decl, DECL_CONTEXT (decl));
5902 /* Build a PARM_DECL for the "this" parameter. TYPE is the
5903 METHOD_TYPE for a non-static member function; QUALS are the
5904 cv-qualifiers that apply to the function. */
5907 build_this_parm (tree type, cp_cv_quals quals)
5912 cp_cv_quals this_quals;
5914 this_type = TREE_VALUE (TYPE_ARG_TYPES (type));
5915 /* The `this' parameter is implicitly `const'; it cannot be
5917 this_quals = (quals & TYPE_QUAL_RESTRICT) | TYPE_QUAL_CONST;
5918 qual_type = cp_build_qualified_type (this_type, this_quals);
5919 parm = build_artificial_parm (this_identifier, qual_type);
5920 cp_apply_type_quals_to_decl (this_quals, parm);
5924 /* CTYPE is class type, or null if non-class.
5925 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
5927 DECLARATOR is the function's name.
5928 PARMS is a chain of PARM_DECLs for the function.
5929 VIRTUALP is truthvalue of whether the function is virtual or not.
5930 FLAGS are to be passed through to `grokclassfn'.
5931 QUALS are qualifiers indicating whether the function is `const'
5933 RAISES is a list of exceptions that this function can raise.
5934 CHECK is 1 if we must find this method in CTYPE, 0 if we should
5935 not look, and -1 if we should not call `grokclassfn' at all.
5937 SFK is the kind of special function (if any) for the new function.
5939 Returns `NULL_TREE' if something goes wrong, after issuing
5940 applicable error messages. */
5943 grokfndecl (tree ctype,
5947 tree orig_declarator,
5949 enum overload_flags flags,
5956 special_function_kind sfk,
5963 int staticp = ctype && TREE_CODE (type) == FUNCTION_TYPE;
5967 type = build_exception_variant (type, raises);
5969 decl = build_lang_decl (FUNCTION_DECL, declarator, type);
5970 if (TREE_CODE (type) == METHOD_TYPE)
5973 parm = build_this_parm (type, quals);
5974 TREE_CHAIN (parm) = parms;
5977 DECL_ARGUMENTS (decl) = parms;
5978 /* Propagate volatile out from type to decl. */
5979 if (TYPE_VOLATILE (type))
5980 TREE_THIS_VOLATILE (decl) = 1;
5983 && TREE_CODE (orig_declarator) == TEMPLATE_ID_EXPR)
5987 ("defining explicit specialization %qD in friend declaration",
5991 tree fns = TREE_OPERAND (orig_declarator, 0);
5992 tree args = TREE_OPERAND (orig_declarator, 1);
5994 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
5996 /* Something like `template <class T> friend void f<T>()'. */
5997 error ("invalid use of template-id %qD in declaration "
5998 "of primary template",
6004 /* A friend declaration of the form friend void f<>(). Record
6005 the information in the TEMPLATE_ID_EXPR. */
6006 SET_DECL_IMPLICIT_INSTANTIATION (decl);
6008 if (TREE_CODE (fns) == COMPONENT_REF)
6010 /* Due to bison parser ickiness, we will have already looked
6011 up an operator_name or PFUNCNAME within the current class
6012 (see template_id in parse.y). If the current class contains
6013 such a name, we'll get a COMPONENT_REF here. Undo that. */
6015 gcc_assert (TREE_TYPE (TREE_OPERAND (fns, 0))
6016 == current_class_type);
6017 fns = TREE_OPERAND (fns, 1);
6019 gcc_assert (TREE_CODE (fns) == IDENTIFIER_NODE
6020 || TREE_CODE (fns) == OVERLOAD);
6021 DECL_TEMPLATE_INFO (decl) = tree_cons (fns, args, NULL_TREE);
6023 for (t = TYPE_ARG_TYPES (TREE_TYPE (decl)); t; t = TREE_CHAIN (t))
6024 if (TREE_PURPOSE (t)
6025 && TREE_CODE (TREE_PURPOSE (t)) == DEFAULT_ARG)
6027 error ("default arguments are not allowed in declaration "
6028 "of friend template specialization %qD",
6035 error ("%<inline%> is not allowed in declaration of friend "
6036 "template specialization %qD",
6043 /* If this decl has namespace scope, set that up. */
6045 set_decl_namespace (decl, in_namespace, friendp);
6047 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
6049 /* `main' and builtins have implicit 'C' linkage. */
6050 if ((MAIN_NAME_P (declarator)
6051 || (IDENTIFIER_LENGTH (declarator) > 10
6052 && IDENTIFIER_POINTER (declarator)[0] == '_'
6053 && IDENTIFIER_POINTER (declarator)[1] == '_'
6054 && strncmp (IDENTIFIER_POINTER (declarator)+2, "builtin_", 8) == 0))
6055 && current_lang_name == lang_name_cplusplus
6056 && ctype == NULL_TREE
6057 /* NULL_TREE means global namespace. */
6058 && DECL_CONTEXT (decl) == NULL_TREE)
6059 SET_DECL_LANGUAGE (decl, lang_c);
6061 /* Should probably propagate const out from type to decl I bet (mrs). */
6064 DECL_STATIC_FUNCTION_P (decl) = 1;
6065 DECL_CONTEXT (decl) = ctype;
6070 DECL_CONTEXT (decl) = ctype;
6072 check_class_member_definition_namespace (decl);
6075 if (ctype == NULL_TREE && DECL_MAIN_P (decl))
6077 if (processing_template_decl)
6078 error ("cannot declare %<::main%> to be a template");
6080 error ("cannot declare %<::main%> to be inline");
6082 error ("cannot declare %<::main%> to be static");
6087 /* Members of anonymous types and local classes have no linkage; make
6088 them internal. If a typedef is made later, this will be changed. */
6089 if (ctype && (TYPE_ANONYMOUS_P (ctype)
6090 || decl_function_context (TYPE_MAIN_DECL (ctype))))
6095 /* [basic.link]: A name with no linkage (notably, the name of a class
6096 or enumeration declared in a local scope) shall not be used to
6097 declare an entity with linkage.
6099 Only check this for public decls for now. See core 319, 389. */
6100 t = no_linkage_check (TREE_TYPE (decl),
6101 /*relaxed_p=*/false);
6104 if (TYPE_ANONYMOUS_P (t))
6106 if (DECL_EXTERN_C_P (decl))
6107 /* Allow this; it's pretty common in C. */;
6110 pedwarn ("non-local function %q#D uses anonymous type",
6112 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
6113 pedwarn ("%q+#D does not refer to the unqualified "
6114 "type, so it is not used for linkage",
6119 pedwarn ("non-local function %q#D uses local type %qT", decl, t);
6123 TREE_PUBLIC (decl) = publicp;
6126 DECL_INTERFACE_KNOWN (decl) = 1;
6127 DECL_NOT_REALLY_EXTERN (decl) = 1;
6130 /* If the declaration was declared inline, mark it as such. */
6132 DECL_DECLARED_INLINE_P (decl) = 1;
6133 /* We inline functions that are explicitly declared inline, or, when
6134 the user explicitly asks us to, all functions. */
6135 if (DECL_DECLARED_INLINE_P (decl)
6136 || (flag_inline_trees == 2 && !DECL_INLINE (decl) && funcdef_flag))
6137 DECL_INLINE (decl) = 1;
6139 DECL_EXTERNAL (decl) = 1;
6140 if (quals && TREE_CODE (type) == FUNCTION_TYPE)
6143 ? G_("static member function %qD cannot have cv-qualifier")
6144 : G_("non-member function %qD cannot have cv-qualifier"),
6146 quals = TYPE_UNQUALIFIED;
6149 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl))
6150 && !grok_op_properties (decl, /*complain=*/true))
6153 if (ctype && decl_function_context (decl))
6154 DECL_NO_STATIC_CHAIN (decl) = 1;
6157 /* Make the init_value nonzero so pushdecl knows this is not
6158 tentative. error_mark_node is replaced later with the BLOCK. */
6159 DECL_INITIAL (decl) = error_mark_node;
6161 if (TYPE_NOTHROW_P (type) || nothrow_libfn_p (decl))
6162 TREE_NOTHROW (decl) = 1;
6164 /* Caller will do the rest of this. */
6168 if (ctype != NULL_TREE)
6170 if (sfk == sfk_constructor)
6171 DECL_CONSTRUCTOR_P (decl) = 1;
6173 grokclassfn (ctype, decl, flags);
6176 decl = check_explicit_specialization (orig_declarator, decl,
6179 4 * (friendp != 0));
6180 if (decl == error_mark_node)
6185 cplus_decl_attributes (&decl, *attrlist, 0);
6186 *attrlist = NULL_TREE;
6189 /* Check main's type after attributes have been applied. */
6190 if (ctype == NULL_TREE && DECL_MAIN_P (decl))
6192 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl)),
6195 tree oldtypeargs = TYPE_ARG_TYPES (TREE_TYPE (decl));
6197 error ("%<::main%> must return %<int%>");
6198 newtype = build_function_type (integer_type_node, oldtypeargs);
6199 TREE_TYPE (decl) = newtype;
6201 check_main_parameter_types (decl);
6204 if (ctype != NULL_TREE
6205 && (! TYPE_FOR_JAVA (ctype) || check_java_method (decl))
6210 old_decl = check_classfn (ctype, decl,
6211 (processing_template_decl
6212 > template_class_depth (ctype))
6213 ? current_template_parms
6220 if (TREE_CODE (old_decl) == TEMPLATE_DECL)
6221 /* Because grokfndecl is always supposed to return a
6222 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
6223 here. We depend on our callers to figure out that its
6224 really a template that's being returned. */
6225 old_decl = DECL_TEMPLATE_RESULT (old_decl);
6227 if (DECL_STATIC_FUNCTION_P (old_decl)
6228 && TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE)
6229 /* Remove the `this' parm added by grokclassfn.
6230 XXX Isn't this done in start_function, too? */
6231 revert_static_member_fn (decl);
6232 if (DECL_ARTIFICIAL (old_decl))
6233 error ("definition of implicitly-declared %qD", old_decl);
6235 /* Since we've smashed OLD_DECL to its
6236 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
6237 if (TREE_CODE (decl) == TEMPLATE_DECL)
6238 decl = DECL_TEMPLATE_RESULT (decl);
6240 /* Attempt to merge the declarations. This can fail, in
6241 the case of some invalid specialization declarations. */
6242 pushed_scope = push_scope (ctype);
6243 ok = duplicate_decls (decl, old_decl, friendp);
6245 pop_scope (pushed_scope);
6248 error ("no %q#D member function declared in class %qT",
6256 if (DECL_CONSTRUCTOR_P (decl) && !grok_ctor_properties (ctype, decl))
6259 if (ctype == NULL_TREE || check)
6263 DECL_VIRTUAL_P (decl) = 1;
6268 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
6269 the linkage that DECL will receive in the object file. */
6272 set_linkage_for_static_data_member (tree decl)
6274 /* A static data member always has static storage duration and
6275 external linkage. Note that static data members are forbidden in
6276 local classes -- the only situation in which a class has
6277 non-external linkage. */
6278 TREE_PUBLIC (decl) = 1;
6279 TREE_STATIC (decl) = 1;
6280 /* For non-template classes, static data members are always put
6281 out in exactly those files where they are defined, just as
6282 with ordinary namespace-scope variables. */
6283 if (!processing_template_decl)
6284 DECL_INTERFACE_KNOWN (decl) = 1;
6287 /* Create a VAR_DECL named NAME with the indicated TYPE.
6289 If SCOPE is non-NULL, it is the class type or namespace containing
6290 the variable. If SCOPE is NULL, the variable should is created in
6291 the innermost enclosings scope. */
6294 grokvardecl (tree type,
6296 const cp_decl_specifier_seq *declspecs,
6302 tree explicit_scope;
6304 gcc_assert (!name || TREE_CODE (name) == IDENTIFIER_NODE);
6306 /* Compute the scope in which to place the variable, but remember
6307 whether or not that scope was explicitly specified by the user. */
6308 explicit_scope = scope;
6311 /* An explicit "extern" specifier indicates a namespace-scope
6313 if (declspecs->storage_class == sc_extern)
6314 scope = current_namespace;
6315 else if (!at_function_scope_p ())
6316 scope = current_scope ();
6320 && (/* If the variable is a namespace-scope variable declared in a
6321 template, we need DECL_LANG_SPECIFIC. */
6322 (TREE_CODE (scope) == NAMESPACE_DECL && processing_template_decl)
6323 /* Similarly for namespace-scope variables with language linkage
6325 || (TREE_CODE (scope) == NAMESPACE_DECL
6326 && current_lang_name != lang_name_cplusplus)
6327 /* Similarly for static data members. */
6329 decl = build_lang_decl (VAR_DECL, name, type);
6331 decl = build_decl (VAR_DECL, name, type);
6333 if (explicit_scope && TREE_CODE (explicit_scope) == NAMESPACE_DECL)
6334 set_decl_namespace (decl, explicit_scope, 0);
6336 DECL_CONTEXT (decl) = FROB_CONTEXT (scope);
6338 if (declspecs->storage_class == sc_extern)
6340 DECL_THIS_EXTERN (decl) = 1;
6341 DECL_EXTERNAL (decl) = !initialized;
6344 if (DECL_CLASS_SCOPE_P (decl))
6346 set_linkage_for_static_data_member (decl);
6347 /* This function is only called with out-of-class definitions. */
6348 DECL_EXTERNAL (decl) = 0;
6349 check_class_member_definition_namespace (decl);
6351 /* At top level, either `static' or no s.c. makes a definition
6352 (perhaps tentative), and absence of `static' makes it public. */
6353 else if (toplevel_bindings_p ())
6355 TREE_PUBLIC (decl) = (declspecs->storage_class != sc_static
6356 && (DECL_THIS_EXTERN (decl) || ! constp));
6357 TREE_STATIC (decl) = ! DECL_EXTERNAL (decl);
6359 /* Not at top level, only `static' makes a static definition. */
6362 TREE_STATIC (decl) = declspecs->storage_class == sc_static;
6363 TREE_PUBLIC (decl) = DECL_EXTERNAL (decl);
6366 if (declspecs->specs[(int)ds_thread])
6367 DECL_TLS_MODEL (decl) = decl_default_tls_model (decl);
6369 if (TREE_PUBLIC (decl))
6371 /* [basic.link]: A name with no linkage (notably, the name of a class
6372 or enumeration declared in a local scope) shall not be used to
6373 declare an entity with linkage.
6375 Only check this for public decls for now. */
6376 tree t = no_linkage_check (TREE_TYPE (decl), /*relaxed_p=*/false);
6379 if (TYPE_ANONYMOUS_P (t))
6381 if (DECL_EXTERN_C_P (decl))
6382 /* Allow this; it's pretty common in C. */
6386 /* DRs 132, 319 and 389 seem to indicate types with
6387 no linkage can only be used to declare extern "C"
6388 entities. Since it's not always an error in the
6389 ISO C++ 90 Standard, we only issue a warning. */
6390 warning (0, "non-local variable %q#D uses anonymous type",
6392 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
6393 warning (0, "%q+#D does not refer to the unqualified "
6394 "type, so it is not used for linkage",
6399 warning (0, "non-local variable %q#D uses local type %qT", decl, t);
6403 DECL_INTERFACE_KNOWN (decl) = 1;
6408 /* Create and return a canonical pointer to member function type, for
6409 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
6412 build_ptrmemfunc_type (tree type)
6416 tree unqualified_variant = NULL_TREE;
6418 if (type == error_mark_node)
6421 /* If a canonical type already exists for this type, use it. We use
6422 this method instead of type_hash_canon, because it only does a
6423 simple equality check on the list of field members. */
6425 if ((t = TYPE_GET_PTRMEMFUNC_TYPE (type)))
6428 /* Make sure that we always have the unqualified pointer-to-member
6430 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
6432 = build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type));
6434 t = make_aggr_type (RECORD_TYPE);
6435 xref_basetypes (t, NULL_TREE);
6437 /* Let the front end know this is a pointer to member function... */
6438 TYPE_PTRMEMFUNC_FLAG (t) = 1;
6439 /* ... and not really an aggregate. */
6440 SET_IS_AGGR_TYPE (t, 0);
6442 field = build_decl (FIELD_DECL, pfn_identifier, type);
6445 field = build_decl (FIELD_DECL, delta_identifier, delta_type_node);
6446 TREE_CHAIN (field) = fields;
6449 finish_builtin_struct (t, "__ptrmemfunc_type", fields, ptr_type_node);
6451 /* Zap out the name so that the back end will give us the debugging
6452 information for this anonymous RECORD_TYPE. */
6453 TYPE_NAME (t) = NULL_TREE;
6455 /* If this is not the unqualified form of this pointer-to-member
6456 type, set the TYPE_MAIN_VARIANT for this type to be the
6457 unqualified type. Since they are actually RECORD_TYPEs that are
6458 not variants of each other, we must do this manually. */
6459 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
6461 t = build_qualified_type (t, cp_type_quals (type));
6462 TYPE_MAIN_VARIANT (t) = unqualified_variant;
6463 TYPE_NEXT_VARIANT (t) = TYPE_NEXT_VARIANT (unqualified_variant);
6464 TYPE_NEXT_VARIANT (unqualified_variant) = t;
6467 /* Cache this pointer-to-member type so that we can find it again
6469 TYPE_SET_PTRMEMFUNC_TYPE (type, t);
6471 if (TYPE_STRUCTURAL_EQUALITY_P (type))
6472 SET_TYPE_STRUCTURAL_EQUALITY (t);
6473 else if (TYPE_CANONICAL (type) != type)
6474 TYPE_CANONICAL (t) = build_ptrmemfunc_type (TYPE_CANONICAL (type));
6479 /* Create and return a pointer to data member type. */
6482 build_ptrmem_type (tree class_type, tree member_type)
6484 if (TREE_CODE (member_type) == METHOD_TYPE)
6488 arg_types = TYPE_ARG_TYPES (member_type);
6489 class_type = (cp_build_qualified_type
6491 cp_type_quals (TREE_TYPE (TREE_VALUE (arg_types)))));
6493 = build_method_type_directly (class_type,
6494 TREE_TYPE (member_type),
6495 TREE_CHAIN (arg_types));
6496 return build_ptrmemfunc_type (build_pointer_type (member_type));
6500 gcc_assert (TREE_CODE (member_type) != FUNCTION_TYPE);
6501 return build_offset_type (class_type, member_type);
6505 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
6506 Check to see that the definition is valid. Issue appropriate error
6507 messages. Return 1 if the definition is particularly bad, or 0
6511 check_static_variable_definition (tree decl, tree type)
6513 /* Motion 10 at San Diego: If a static const integral data member is
6514 initialized with an integral constant expression, the initializer
6515 may appear either in the declaration (within the class), or in
6516 the definition, but not both. If it appears in the class, the
6517 member is a member constant. The file-scope definition is always
6519 if (!ARITHMETIC_TYPE_P (type) && TREE_CODE (type) != ENUMERAL_TYPE)
6521 error ("invalid in-class initialization of static data member "
6522 "of non-integral type %qT",
6524 /* If we just return the declaration, crashes will sometimes
6525 occur. We therefore return void_type_node, as if this were a
6526 friend declaration, to cause callers to completely ignore
6527 this declaration. */
6530 else if (!CP_TYPE_CONST_P (type))
6531 error ("ISO C++ forbids in-class initialization of non-const "
6532 "static member %qD",
6534 else if (pedantic && !INTEGRAL_TYPE_P (type))
6535 pedwarn ("ISO C++ forbids initialization of member constant "
6536 "%qD of non-integral type %qT", decl, type);
6541 /* Given the SIZE (i.e., number of elements) in an array, compute an
6542 appropriate index type for the array. If non-NULL, NAME is the
6543 name of the thing being declared. */
6546 compute_array_index_type (tree name, tree size)
6550 tree abi_1_itype = NULL_TREE;
6552 if (error_operand_p (size))
6553 return error_mark_node;
6555 type = TREE_TYPE (size);
6556 /* The array bound must be an integer type. */
6557 if (!dependent_type_p (type) && !INTEGRAL_TYPE_P (type))
6560 error ("size of array %qD has non-integral type %qT", name, type);
6562 error ("size of array has non-integral type %qT", type);
6563 size = integer_one_node;
6564 type = TREE_TYPE (size);
6567 if (value_dependent_expression_p (size))
6569 /* We cannot do any checking for a value-dependent SIZE. Just
6570 build the index type and mark that it requires structural
6572 itype = build_index_type (build_min (MINUS_EXPR, sizetype,
6573 size, integer_one_node));
6574 SET_TYPE_STRUCTURAL_EQUALITY (itype);
6578 if (!abi_version_at_least (2) && processing_template_decl)
6579 /* For abi-1, we handled all instances in templates the same way,
6580 even when they were non-dependent. This effects the manglings
6581 produced. So, we do the normal checking for non-dependent
6582 sizes, but at the end we'll return the same type that abi-1
6583 would have, but with TYPE_CANONICAL set to the "right"
6584 value that the current ABI would provide. */
6585 abi_1_itype = build_index_type (build_min (MINUS_EXPR, sizetype,
6586 size, integer_one_node));
6588 /* The size might be the result of a cast. */
6589 STRIP_TYPE_NOPS (size);
6591 /* It might be a const variable or enumeration constant. */
6592 size = integral_constant_value (size);
6594 /* Normally, the array-bound will be a constant. */
6595 if (TREE_CODE (size) == INTEGER_CST)
6597 /* Check to see if the array bound overflowed. Make that an
6598 error, no matter how generous we're being. */
6599 int old_flag_pedantic_errors = flag_pedantic_errors;
6600 int old_pedantic = pedantic;
6601 pedantic = flag_pedantic_errors = 1;
6602 constant_expression_warning (size);
6603 pedantic = old_pedantic;
6604 flag_pedantic_errors = old_flag_pedantic_errors;
6606 /* An array must have a positive number of elements. */
6607 if (INT_CST_LT (size, integer_zero_node))
6610 error ("size of array %qD is negative", name);
6612 error ("size of array is negative");
6613 size = integer_one_node;
6615 /* As an extension we allow zero-sized arrays. We always allow
6616 them in system headers because glibc uses them. */
6617 else if (integer_zerop (size) && pedantic && !in_system_header)
6620 pedwarn ("ISO C++ forbids zero-size array %qD", name);
6622 pedwarn ("ISO C++ forbids zero-size array");
6625 else if (TREE_CONSTANT (size))
6627 /* `(int) &fn' is not a valid array bound. */
6629 error ("size of array %qD is not an integral constant-expression",
6632 error ("size of array is not an integral constant-expression");
6633 size = integer_one_node;
6638 pedwarn ("ISO C++ forbids variable-size array %qD", name);
6640 pedwarn ("ISO C++ forbids variable-size array");
6643 if (processing_template_decl && !TREE_CONSTANT (size))
6644 /* A variable sized array. */
6645 itype = build_min (MINUS_EXPR, sizetype, size, integer_one_node);
6648 HOST_WIDE_INT saved_processing_template_decl;
6650 /* Compute the index of the largest element in the array. It is
6651 one less than the number of elements in the array. We save
6652 and restore PROCESSING_TEMPLATE_DECL so that computations in
6653 cp_build_binary_op will be appropriately folded. */
6654 saved_processing_template_decl = processing_template_decl;
6655 processing_template_decl = 0;
6656 itype = cp_build_binary_op (MINUS_EXPR,
6657 cp_convert (ssizetype, size),
6658 cp_convert (ssizetype, integer_one_node));
6659 itype = fold (itype);
6660 processing_template_decl = saved_processing_template_decl;
6662 if (!TREE_CONSTANT (itype))
6663 /* A variable sized array. */
6664 itype = variable_size (itype);
6665 /* Make sure that there was no overflow when creating to a signed
6666 index type. (For example, on a 32-bit machine, an array with
6667 size 2^32 - 1 is too big.) */
6668 else if (TREE_CODE (itype) == INTEGER_CST
6669 && TREE_OVERFLOW (itype))
6671 error ("overflow in array dimension");
6672 TREE_OVERFLOW (itype) = 0;
6676 /* Create and return the appropriate index type. */
6679 tree t = build_index_type (itype);
6680 TYPE_CANONICAL (abi_1_itype) = TYPE_CANONICAL (t);
6684 return build_index_type (itype);
6687 /* Returns the scope (if any) in which the entity declared by
6688 DECLARATOR will be located. If the entity was declared with an
6689 unqualified name, NULL_TREE is returned. */
6692 get_scope_of_declarator (const cp_declarator *declarator)
6694 while (declarator && declarator->kind != cdk_id)
6695 declarator = declarator->declarator;
6697 /* If the declarator-id is a SCOPE_REF, the scope in which the
6698 declaration occurs is the first operand. */
6700 && declarator->u.id.qualifying_scope)
6701 return declarator->u.id.qualifying_scope;
6703 /* Otherwise, the declarator is not a qualified name; the entity will
6704 be declared in the current scope. */
6708 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
6709 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
6713 create_array_type_for_decl (tree name, tree type, tree size)
6715 tree itype = NULL_TREE;
6716 const char* error_msg;
6718 /* If things have already gone awry, bail now. */
6719 if (type == error_mark_node || size == error_mark_node)
6720 return error_mark_node;
6722 /* Assume that everything will go OK. */
6725 /* There are some types which cannot be array elements. */
6726 switch (TREE_CODE (type))
6729 error_msg = "array of void";
6733 error_msg = "array of functions";
6736 case REFERENCE_TYPE:
6737 error_msg = "array of references";
6741 error_msg = "array of function members";
6748 /* If something went wrong, issue an error-message and return. */
6752 error ("declaration of %qD as %s", name, error_msg);
6754 error ("creating %s", error_msg);
6756 return error_mark_node;
6761 The constant expressions that specify the bounds of the arrays
6762 can be omitted only for the first member of the sequence. */
6763 if (TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type))
6766 error ("declaration of %qD as multidimensional array must "
6767 "have bounds for all dimensions except the first",
6770 error ("multidimensional array must have bounds for all "
6771 "dimensions except the first");
6773 return error_mark_node;
6776 /* Figure out the index type for the array. */
6778 itype = compute_array_index_type (name, size);
6781 T is called the array element type; this type shall not be [...] an
6782 abstract class type. */
6783 abstract_virtuals_error (name, type);
6785 return build_cplus_array_type (type, itype);
6788 /* Check that it's OK to declare a function with the indicated TYPE.
6789 SFK indicates the kind of special function (if any) that this
6790 function is. OPTYPE is the type given in a conversion operator
6791 declaration, or the class type for a constructor/destructor.
6792 Returns the actual return type of the function; that
6793 may be different than TYPE if an error occurs, or for certain
6794 special functions. */
6797 check_special_function_return_type (special_function_kind sfk,
6803 case sfk_constructor:
6805 error ("return type specification for constructor invalid");
6807 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
6808 type = build_pointer_type (optype);
6810 type = void_type_node;
6813 case sfk_destructor:
6815 error ("return type specification for destructor invalid");
6816 /* We can't use the proper return type here because we run into
6817 problems with ambiguous bases and covariant returns.
6818 Java classes are left unchanged because (void *) isn't a valid
6819 Java type, and we don't want to change the Java ABI. */
6820 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
6821 type = build_pointer_type (void_type_node);
6823 type = void_type_node;
6826 case sfk_conversion:
6827 if (type && !same_type_p (type, optype))
6828 error ("operator %qT declared to return %qT", optype, type);
6830 pedwarn ("return type specified for %<operator %T%>", optype);
6841 /* A variable or data member (whose unqualified name is IDENTIFIER)
6842 has been declared with the indicated TYPE. If the TYPE is not
6843 acceptable, issue an error message and return a type to use for
6844 error-recovery purposes. */
6847 check_var_type (tree identifier, tree type)
6849 if (VOID_TYPE_P (type))
6852 error ("unnamed variable or field declared void");
6853 else if (TREE_CODE (identifier) == IDENTIFIER_NODE)
6855 gcc_assert (!IDENTIFIER_OPNAME_P (identifier));
6856 error ("variable or field %qE declared void", identifier);
6859 error ("variable or field declared void");
6860 type = error_mark_node;
6866 /* Given declspecs and a declarator (abstract or otherwise), determine
6867 the name and type of the object declared and construct a DECL node
6870 DECLSPECS points to the representation of declaration-specifier
6871 sequence that precedes declarator.
6873 DECL_CONTEXT says which syntactic context this declaration is in:
6874 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
6875 FUNCDEF for a function definition. Like NORMAL but a few different
6876 error messages in each case. Return value may be zero meaning
6877 this definition is too screwy to try to parse.
6878 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
6879 handle member functions (which have FIELD context).
6880 Return value may be zero meaning this definition is too screwy to
6882 PARM for a parameter declaration (either within a function prototype
6883 or before a function body). Make a PARM_DECL, or return void_type_node.
6884 CATCHPARM for a parameter declaration before a catch clause.
6885 TYPENAME if for a typename (in a cast or sizeof).
6886 Don't make a DECL node; just return the ..._TYPE node.
6887 FIELD for a struct or union field; make a FIELD_DECL.
6888 BITFIELD for a field with specified width.
6889 INITIALIZED is 1 if the decl has an initializer.
6891 ATTRLIST is a pointer to the list of attributes, which may be NULL
6892 if there are none; *ATTRLIST may be modified if attributes from inside
6893 the declarator should be applied to the declaration.
6895 When this function is called, scoping variables (such as
6896 CURRENT_CLASS_TYPE) should reflect the scope in which the
6897 declaration occurs, not the scope in which the new declaration will
6898 be placed. For example, on:
6902 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
6905 Returns a DECL (if a declarator is present), a TYPE (if there is no
6906 declarator, in cases like "struct S;"), or the ERROR_MARK_NODE if an
6910 grokdeclarator (const cp_declarator *declarator,
6911 const cp_decl_specifier_seq *declspecs,
6912 enum decl_context decl_context,
6916 tree type = NULL_TREE;
6918 int virtualp, explicitp, friendp, inlinep, staticp;
6919 int explicit_int = 0;
6920 int explicit_char = 0;
6921 int defaulted_int = 0;
6922 tree dependent_name = NULL_TREE;
6924 tree typedef_decl = NULL_TREE;
6925 const char *name = NULL;
6926 tree typedef_type = NULL_TREE;
6927 /* True if this declarator is a function definition. */
6928 bool funcdef_flag = false;
6929 cp_declarator_kind innermost_code = cdk_error;
6932 /* See the code below that used this. */
6933 tree decl_attr = NULL_TREE;
6936 /* Keep track of what sort of function is being processed
6937 so that we can warn about default return values, or explicit
6938 return values which do not match prescribed defaults. */
6939 special_function_kind sfk = sfk_none;
6941 tree dname = NULL_TREE;
6942 tree ctor_return_type = NULL_TREE;
6943 enum overload_flags flags = NO_SPECIAL;
6944 /* cv-qualifiers that apply to the declarator, for a declaration of
6945 a member function. */
6946 cp_cv_quals memfn_quals = TYPE_UNQUALIFIED;
6947 /* cv-qualifiers that apply to the type specified by the DECLSPECS. */
6949 tree raises = NULL_TREE;
6950 int template_count = 0;
6951 tree returned_attrs = NULL_TREE;
6952 tree parms = NULL_TREE;
6953 const cp_declarator *id_declarator;
6954 /* The unqualified name of the declarator; either an
6955 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
6956 tree unqualified_id;
6957 /* The class type, if any, in which this entity is located,
6958 or NULL_TREE if none. Note that this value may be different from
6959 the current class type; for example if an attempt is made to declare
6960 "A::f" inside "B", this value will be "A". */
6961 tree ctype = current_class_type;
6962 /* The NAMESPACE_DECL for the namespace in which this entity is
6963 located. If an unqualified name is used to declare the entity,
6964 this value will be NULL_TREE, even if the entity is located at
6966 tree in_namespace = NULL_TREE;
6967 cp_storage_class storage_class;
6968 bool unsigned_p, signed_p, short_p, long_p, thread_p;
6969 bool type_was_error_mark_node = false;
6970 bool set_no_warning = false;
6972 signed_p = declspecs->specs[(int)ds_signed];
6973 unsigned_p = declspecs->specs[(int)ds_unsigned];
6974 short_p = declspecs->specs[(int)ds_short];
6975 long_p = declspecs->specs[(int)ds_long];
6976 longlong = declspecs->specs[(int)ds_long] >= 2;
6977 thread_p = declspecs->specs[(int)ds_thread];
6979 if (decl_context == FUNCDEF)
6980 funcdef_flag = true, decl_context = NORMAL;
6981 else if (decl_context == MEMFUNCDEF)
6982 funcdef_flag = true, decl_context = FIELD;
6983 else if (decl_context == BITFIELD)
6984 bitfield = 1, decl_context = FIELD;
6986 /* Look inside a declarator for the name being declared
6987 and get it as a string, for an error message. */
6988 for (id_declarator = declarator;
6990 id_declarator = id_declarator->declarator)
6992 if (id_declarator->kind != cdk_id)
6993 innermost_code = id_declarator->kind;
6995 switch (id_declarator->kind)
6998 if (id_declarator->declarator
6999 && id_declarator->declarator->kind == cdk_id)
7001 sfk = id_declarator->declarator->u.id.sfk;
7002 if (sfk == sfk_destructor)
7009 tree qualifying_scope = id_declarator->u.id.qualifying_scope;
7010 tree decl = id_declarator->u.id.unqualified_name;
7013 if (qualifying_scope)
7015 if (at_function_scope_p ())
7019 A declarator-id shall not be qualified except
7022 None of the cases are permitted in block
7024 if (qualifying_scope == global_namespace)
7025 error ("invalid use of qualified-name %<::%D%>",
7027 else if (TYPE_P (qualifying_scope))
7028 error ("invalid use of qualified-name %<%T::%D%>",
7029 qualifying_scope, decl);
7031 error ("invalid use of qualified-name %<%D::%D%>",
7032 qualifying_scope, decl);
7033 return error_mark_node;
7035 else if (TYPE_P (qualifying_scope))
7037 ctype = qualifying_scope;
7038 if (innermost_code != cdk_function
7039 && current_class_type
7040 && !UNIQUELY_DERIVED_FROM_P (ctype,
7041 current_class_type))
7043 error ("type %qT is not derived from type %qT",
7044 ctype, current_class_type);
7045 return error_mark_node;
7048 else if (TREE_CODE (qualifying_scope) == NAMESPACE_DECL)
7049 in_namespace = qualifying_scope;
7051 switch (TREE_CODE (decl))
7057 if (innermost_code != cdk_function)
7059 error ("declaration of %qD as non-function", decl);
7060 return error_mark_node;
7062 else if (!qualifying_scope
7063 && !(current_class_type && at_class_scope_p ()))
7065 error ("declaration of %qD as non-member", decl);
7066 return error_mark_node;
7069 type = TREE_OPERAND (decl, 0);
7070 name = IDENTIFIER_POINTER (constructor_name (type));
7075 case TEMPLATE_ID_EXPR:
7077 tree fns = TREE_OPERAND (decl, 0);
7080 if (TREE_CODE (dname) != IDENTIFIER_NODE)
7082 gcc_assert (is_overloaded_fn (dname));
7083 dname = DECL_NAME (get_first_fn (dname));
7088 case IDENTIFIER_NODE:
7089 if (TREE_CODE (decl) == IDENTIFIER_NODE)
7092 if (C_IS_RESERVED_WORD (dname))
7094 error ("declarator-id missing; using reserved word %qD",
7096 name = IDENTIFIER_POINTER (dname);
7098 else if (!IDENTIFIER_TYPENAME_P (dname))
7099 name = IDENTIFIER_POINTER (dname);
7102 gcc_assert (flags == NO_SPECIAL);
7103 flags = TYPENAME_FLAG;
7104 ctor_return_type = TREE_TYPE (dname);
7105 sfk = sfk_conversion;
7106 if (is_typename_at_global_scope (dname))
7107 name = IDENTIFIER_POINTER (dname);
7109 name = "<invalid operator>";
7125 return error_mark_node;
7131 if (id_declarator->kind == cdk_id)
7137 The declarator in a function-definition shall have the form
7138 D1 ( parameter-declaration-clause) ... */
7139 if (funcdef_flag && innermost_code != cdk_function)
7141 error ("function definition does not declare parameters");
7142 return error_mark_node;
7145 if (((dname && IDENTIFIER_OPNAME_P (dname)) || flags == TYPENAME_FLAG)
7146 && innermost_code != cdk_function
7147 && ! (ctype && !declspecs->any_specifiers_p))
7149 error ("declaration of %qD as non-function", dname);
7150 return error_mark_node;
7153 /* Anything declared one level down from the top level
7154 must be one of the parameters of a function
7155 (because the body is at least two levels down). */
7157 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
7158 by not allowing C++ class definitions to specify their parameters
7159 with xdecls (must be spec.d in the parmlist).
7161 Since we now wait to push a class scope until we are sure that
7162 we are in a legitimate method context, we must set oldcname
7163 explicitly (since current_class_name is not yet alive).
7165 We also want to avoid calling this a PARM if it is in a namespace. */
7167 if (decl_context == NORMAL && !toplevel_bindings_p ())
7169 struct cp_binding_level *b = current_binding_level;
7170 current_binding_level = b->level_chain;
7171 if (current_binding_level != 0 && toplevel_bindings_p ())
7172 decl_context = PARM;
7173 current_binding_level = b;
7177 name = decl_context == PARM ? "parameter" : "type name";
7179 /* If there were multiple types specified in the decl-specifier-seq,
7180 issue an error message. */
7181 if (declspecs->multiple_types_p)
7183 error ("two or more data types in declaration of %qs", name);
7184 return error_mark_node;
7187 /* Extract the basic type from the decl-specifier-seq. */
7188 type = declspecs->type;
7189 if (type == error_mark_node)
7192 type_was_error_mark_node = true;
7194 /* If the entire declaration is itself tagged as deprecated then
7195 suppress reports of deprecated items. */
7196 if (type && TREE_DEPRECATED (type)
7197 && deprecated_state != DEPRECATED_SUPPRESS)
7198 warn_deprecated_use (type);
7199 if (type && TREE_CODE (type) == TYPE_DECL)
7201 typedef_decl = type;
7202 type = TREE_TYPE (typedef_decl);
7204 /* No type at all: default to `int', and set DEFAULTED_INT
7205 because it was not a user-defined typedef. */
7206 if (type == NULL_TREE && (signed_p || unsigned_p || long_p || short_p))
7208 /* These imply 'int'. */
7209 type = integer_type_node;
7213 explicit_int = declspecs->explicit_int_p;
7214 explicit_char = declspecs->explicit_char_p;
7217 /* See the code below that used this. */
7219 decl_attr = DECL_ATTRIBUTES (typedef_decl);
7221 typedef_type = type;
7224 if (sfk != sfk_conversion)
7225 ctor_return_type = ctype;
7227 if (sfk != sfk_none)
7228 type = check_special_function_return_type (sfk, type,
7230 else if (type == NULL_TREE)
7236 /* We handle `main' specially here, because 'main () { }' is so
7237 common. With no options, it is allowed. With -Wreturn-type,
7238 it is a warning. It is only an error with -pedantic-errors. */
7239 is_main = (funcdef_flag
7240 && dname && MAIN_NAME_P (dname)
7241 && ctype == NULL_TREE
7242 && in_namespace == NULL_TREE
7243 && current_namespace == global_namespace);
7245 if (type_was_error_mark_node)
7246 /* We've already issued an error, don't complain more. */;
7247 else if (in_system_header || flag_ms_extensions)
7248 /* Allow it, sigh. */;
7249 else if (pedantic || ! is_main)
7250 pedwarn ("ISO C++ forbids declaration of %qs with no type", name);
7252 warning (OPT_Wreturn_type,
7253 "ISO C++ forbids declaration of %qs with no type", name);
7255 type = integer_type_node;
7260 /* Now process the modifiers that were specified
7261 and check for invalid combinations. */
7263 /* Long double is a special combination. */
7264 if (long_p && !longlong && TYPE_MAIN_VARIANT (type) == double_type_node)
7267 type = build_qualified_type (long_double_type_node,
7268 cp_type_quals (type));
7271 /* Check all other uses of type modifiers. */
7273 if (unsigned_p || signed_p || long_p || short_p)
7277 if ((signed_p || unsigned_p) && TREE_CODE (type) != INTEGER_TYPE)
7278 error ("%<signed%> or %<unsigned%> invalid for %qs", name);
7279 else if (signed_p && unsigned_p)
7280 error ("%<signed%> and %<unsigned%> specified together for %qs", name);
7281 else if (longlong && TREE_CODE (type) != INTEGER_TYPE)
7282 error ("%<long long%> invalid for %qs", name);
7283 else if (long_p && TREE_CODE (type) == REAL_TYPE)
7284 error ("%<long%> invalid for %qs", name);
7285 else if (short_p && TREE_CODE (type) == REAL_TYPE)
7286 error ("%<short%> invalid for %qs", name);
7287 else if ((long_p || short_p) && TREE_CODE (type) != INTEGER_TYPE)
7288 error ("%<long%> or %<short%> invalid for %qs", name);
7289 else if ((long_p || short_p) && explicit_char)
7290 error ("%<long%> or %<short%> specified with char for %qs", name);
7291 else if (long_p && short_p)
7292 error ("%<long%> and %<short%> specified together for %qs", name);
7296 if (!explicit_int && !defaulted_int && !explicit_char && pedantic)
7298 pedwarn ("long, short, signed or unsigned used invalidly for %qs",
7300 if (flag_pedantic_errors)
7305 /* Discard the type modifiers if they are invalid. */
7316 /* Decide whether an integer type is signed or not.
7317 Optionally treat bitfields as signed by default. */
7321 It is implementation-defined whether a plain (neither
7322 explicitly signed or unsigned) char, short, int, or long
7323 bit-field is signed or unsigned.
7325 Naturally, we extend this to long long as well. Note that
7326 this does not include wchar_t. */
7327 || (bitfield && !flag_signed_bitfields
7329 /* A typedef for plain `int' without `signed' can be
7330 controlled just like plain `int', but a typedef for
7331 `signed int' cannot be so controlled. */
7333 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl))
7334 && TREE_CODE (type) == INTEGER_TYPE
7335 && !same_type_p (TYPE_MAIN_VARIANT (type), wchar_type_node)))
7338 type = long_long_unsigned_type_node;
7340 type = long_unsigned_type_node;
7342 type = short_unsigned_type_node;
7343 else if (type == char_type_node)
7344 type = unsigned_char_type_node;
7345 else if (typedef_decl)
7346 type = c_common_unsigned_type (type);
7348 type = unsigned_type_node;
7350 else if (signed_p && type == char_type_node)
7351 type = signed_char_type_node;
7353 type = long_long_integer_type_node;
7355 type = long_integer_type_node;
7357 type = short_integer_type_node;
7359 if (declspecs->specs[(int)ds_complex])
7361 if (TREE_CODE (type) != INTEGER_TYPE && TREE_CODE (type) != REAL_TYPE)
7362 error ("complex invalid for %qs", name);
7363 /* If we just have "complex", it is equivalent to
7364 "complex double", but if any modifiers at all are specified it is
7365 the complex form of TYPE. E.g, "complex short" is
7366 "complex short int". */
7368 else if (defaulted_int && ! longlong
7369 && ! (long_p || short_p || signed_p || unsigned_p))
7370 type = complex_double_type_node;
7371 else if (type == integer_type_node)
7372 type = complex_integer_type_node;
7373 else if (type == float_type_node)
7374 type = complex_float_type_node;
7375 else if (type == double_type_node)
7376 type = complex_double_type_node;
7377 else if (type == long_double_type_node)
7378 type = complex_long_double_type_node;
7380 type = build_complex_type (type);
7383 type_quals = TYPE_UNQUALIFIED;
7384 if (declspecs->specs[(int)ds_const])
7385 type_quals |= TYPE_QUAL_CONST;
7386 if (declspecs->specs[(int)ds_volatile])
7387 type_quals |= TYPE_QUAL_VOLATILE;
7388 if (declspecs->specs[(int)ds_restrict])
7389 type_quals |= TYPE_QUAL_RESTRICT;
7390 if (sfk == sfk_conversion && type_quals != TYPE_UNQUALIFIED)
7391 error ("qualifiers are not allowed on declaration of %<operator %T%>",
7394 if (TREE_CODE (type) == FUNCTION_TYPE
7395 && type_quals != TYPE_UNQUALIFIED)
7397 /* This was an error in C++98 (cv-qualifiers cannot be added to
7398 a function type), but DR 295 makes the code well-formed by
7399 dropping the extra qualifiers. */
7402 tree bad_type = build_qualified_type (type, type_quals);
7403 pedwarn ("ignoring %qV qualifiers added to function type %qT",
7406 type_quals = TYPE_UNQUALIFIED;
7408 type_quals |= cp_type_quals (type);
7409 type = cp_build_qualified_type_real
7410 (type, type_quals, ((typedef_decl && !DECL_ARTIFICIAL (typedef_decl)
7411 ? tf_ignore_bad_quals : 0) | tf_warning_or_error));
7412 /* We might have ignored or rejected some of the qualifiers. */
7413 type_quals = cp_type_quals (type);
7416 inlinep = !! declspecs->specs[(int)ds_inline];
7417 virtualp = !! declspecs->specs[(int)ds_virtual];
7418 explicitp = !! declspecs->specs[(int)ds_explicit];
7420 storage_class = declspecs->storage_class;
7421 if (storage_class == sc_static)
7422 staticp = 1 + (decl_context == FIELD);
7424 if (virtualp && staticp == 2)
7426 error ("member %qD cannot be declared both virtual and static", dname);
7427 storage_class = sc_none;
7430 friendp = !! declspecs->specs[(int)ds_friend];
7432 if (dependent_name && !friendp)
7434 error ("%<%T::%D%> is not a valid declarator", ctype, dependent_name);
7435 return error_mark_node;
7438 /* Issue errors about use of storage classes for parameters. */
7439 if (decl_context == PARM)
7441 if (declspecs->specs[(int)ds_typedef])
7443 error ("typedef declaration invalid in parameter declaration");
7444 return error_mark_node;
7446 else if (storage_class == sc_static
7447 || storage_class == sc_extern
7449 error ("storage class specifiers invalid in parameter declarations");
7452 /* Give error if `virtual' is used outside of class declaration. */
7454 && (current_class_name == NULL_TREE || decl_context != FIELD))
7456 error ("virtual outside class declaration");
7460 /* Static anonymous unions are dealt with here. */
7461 if (staticp && decl_context == TYPENAME
7463 && ANON_AGGR_TYPE_P (declspecs->type))
7464 decl_context = FIELD;
7466 /* Warn about storage classes that are invalid for certain
7467 kinds of declarations (parameters, typenames, etc.). */
7470 && storage_class != sc_extern
7471 && storage_class != sc_static)
7472 || declspecs->specs[(int)ds_typedef]))
7474 error ("multiple storage classes in declaration of %qs", name);
7477 if (declspecs->conflicting_specifiers_p)
7479 error ("conflicting specifiers in declaration of %qs", name);
7480 storage_class = sc_none;
7482 else if (decl_context != NORMAL
7483 && ((storage_class != sc_none
7484 && storage_class != sc_mutable)
7487 if ((decl_context == PARM || decl_context == CATCHPARM)
7488 && (storage_class == sc_register
7489 || storage_class == sc_auto))
7491 else if (declspecs->specs[(int)ds_typedef])
7493 else if (decl_context == FIELD
7494 /* C++ allows static class elements. */
7495 && storage_class == sc_static)
7496 /* C++ also allows inlines and signed and unsigned elements,
7497 but in those cases we don't come in here. */
7501 if (decl_context == FIELD)
7502 error ("storage class specified for %qs", name);
7505 if (decl_context == PARM || decl_context == CATCHPARM)
7506 error ("storage class specified for parameter %qs", name);
7508 error ("storage class specified for typename");
7510 if (storage_class == sc_register
7511 || storage_class == sc_auto
7512 || storage_class == sc_extern
7514 storage_class = sc_none;
7517 else if (storage_class == sc_extern && initialized
7520 if (toplevel_bindings_p ())
7522 /* It's common practice (and completely valid) to have a const
7523 be initialized and declared extern. */
7524 if (!(type_quals & TYPE_QUAL_CONST))
7525 warning (0, "%qs initialized and declared %<extern%>", name);
7528 error ("%qs has both %<extern%> and initializer", name);
7530 else if (storage_class == sc_extern && funcdef_flag
7531 && ! toplevel_bindings_p ())
7532 error ("nested function %qs declared %<extern%>", name);
7533 else if (toplevel_bindings_p ())
7535 if (storage_class == sc_auto)
7536 error ("top-level declaration of %qs specifies %<auto%>", name);
7539 && storage_class != sc_extern
7540 && storage_class != sc_static)
7542 error ("function-scope %qs implicitly auto and declared %<__thread%>",
7547 if (storage_class && friendp)
7548 error ("storage class specifiers invalid in friend function declarations");
7551 unqualified_id = NULL_TREE;
7554 unqualified_id = id_declarator->u.id.unqualified_name;
7555 switch (TREE_CODE (unqualified_id))
7559 = constructor_name (TREE_OPERAND (unqualified_id, 0));
7562 case IDENTIFIER_NODE:
7563 case TEMPLATE_ID_EXPR:
7571 /* Determine the type of the entity declared by recurring on the
7573 for (; declarator; declarator = declarator->declarator)
7575 const cp_declarator *inner_declarator;
7578 if (type == error_mark_node)
7579 return error_mark_node;
7581 attrs = declarator->attributes;
7587 if (declarator == NULL || declarator->kind == cdk_id)
7588 attr_flags |= (int) ATTR_FLAG_DECL_NEXT;
7589 if (declarator->kind == cdk_function)
7590 attr_flags |= (int) ATTR_FLAG_FUNCTION_NEXT;
7591 if (declarator->kind == cdk_array)
7592 attr_flags |= (int) ATTR_FLAG_ARRAY_NEXT;
7593 returned_attrs = decl_attributes (&type,
7594 chainon (returned_attrs, attrs),
7598 if (declarator->kind == cdk_id)
7601 inner_declarator = declarator->declarator;
7603 switch (declarator->kind)
7606 type = create_array_type_for_decl (dname, type,
7607 declarator->u.array.bounds);
7615 /* Declaring a function type.
7616 Make sure we have a valid type for the function to return. */
7618 if (type_quals != TYPE_UNQUALIFIED)
7620 if (SCALAR_TYPE_P (type) || VOID_TYPE_P (type))
7621 warning (OPT_Wreturn_type,
7622 "type qualifiers ignored on function return type");
7623 /* We now know that the TYPE_QUALS don't apply to the
7624 decl, but to its return type. */
7625 type_quals = TYPE_UNQUALIFIED;
7626 set_no_warning = true;
7629 /* Warn about some types functions can't return. */
7631 if (TREE_CODE (type) == FUNCTION_TYPE)
7633 error ("%qs declared as function returning a function", name);
7634 type = integer_type_node;
7636 if (TREE_CODE (type) == ARRAY_TYPE)
7638 error ("%qs declared as function returning an array", name);
7639 type = integer_type_node;
7642 /* Pick up type qualifiers which should be applied to `this'. */
7643 memfn_quals = declarator->u.function.qualifiers;
7645 /* Pick up the exception specifications. */
7646 raises = declarator->u.function.exception_specification;
7648 /* Say it's a definition only for the CALL_EXPR
7649 closest to the identifier. */
7650 funcdecl_p = inner_declarator && inner_declarator->kind == cdk_id;
7652 if (ctype == NULL_TREE
7653 && decl_context == FIELD
7655 && (friendp == 0 || dname == current_class_name))
7656 ctype = current_class_type;
7658 if (ctype && (sfk == sfk_constructor
7659 || sfk == sfk_destructor))
7661 /* We are within a class's scope. If our declarator name
7662 is the same as the class name, and we are defining
7663 a function, then it is a constructor/destructor, and
7664 therefore returns a void type. */
7666 /* ISO C++ 12.4/2. A destructor may not be declared
7667 const or volatile. A destructor may not be
7670 ISO C++ 12.1. A constructor may not be declared
7671 const or volatile. A constructor may not be
7672 virtual. A constructor may not be static. */
7674 error ((flags == DTOR_FLAG)
7675 ? "destructor cannot be static member function"
7676 : "constructor cannot be static member function");
7679 error ((flags == DTOR_FLAG)
7680 ? "destructors may not be cv-qualified"
7681 : "constructors may not be cv-qualified");
7682 memfn_quals = TYPE_UNQUALIFIED;
7685 if (decl_context == FIELD
7686 && !member_function_or_else (ctype,
7689 return error_mark_node;
7691 if (flags != DTOR_FLAG)
7693 /* It's a constructor. */
7698 pedwarn ("constructors cannot be declared virtual");
7701 if (decl_context == FIELD
7702 && sfk != sfk_constructor)
7703 return error_mark_node;
7705 if (decl_context == FIELD)
7711 error ("can't initialize friend function %qs", name);
7714 /* Cannot be both friend and virtual. */
7715 error ("virtual functions cannot be friends");
7718 if (decl_context == NORMAL)
7719 error ("friend declaration not in class definition");
7720 if (current_function_decl && funcdef_flag)
7721 error ("can't define friend function %qs in a local "
7726 arg_types = grokparms (declarator->u.function.parameters,
7729 if (inner_declarator
7730 && inner_declarator->kind == cdk_id
7731 && inner_declarator->u.id.sfk == sfk_destructor
7732 && arg_types != void_list_node)
7734 error ("destructors may not have parameters");
7735 arg_types = void_list_node;
7739 type = build_function_type (type, arg_types);
7746 /* Filter out pointers-to-references and references-to-references.
7747 We can get these if a TYPE_DECL is used. */
7749 if (TREE_CODE (type) == REFERENCE_TYPE)
7751 error (declarator->kind == cdk_reference
7752 ? "cannot declare reference to %q#T"
7753 : "cannot declare pointer to %q#T", type);
7754 type = TREE_TYPE (type);
7756 else if (VOID_TYPE_P (type))
7758 if (declarator->kind == cdk_reference)
7759 error ("cannot declare reference to %q#T", type);
7760 else if (declarator->kind == cdk_ptrmem)
7761 error ("cannot declare pointer to %q#T member", type);
7764 /* We now know that the TYPE_QUALS don't apply to the decl,
7765 but to the target of the pointer. */
7766 type_quals = TYPE_UNQUALIFIED;
7768 if (declarator->kind == cdk_ptrmem
7769 && (TREE_CODE (type) == FUNCTION_TYPE || memfn_quals))
7771 memfn_quals |= cp_type_quals (type);
7772 type = build_memfn_type (type,
7773 declarator->u.pointer.class_type,
7775 memfn_quals = TYPE_UNQUALIFIED;
7778 if (declarator->kind == cdk_reference)
7780 if (!VOID_TYPE_P (type))
7781 type = build_reference_type (type);
7783 else if (TREE_CODE (type) == METHOD_TYPE)
7784 type = build_ptrmemfunc_type (build_pointer_type (type));
7785 else if (declarator->kind == cdk_ptrmem)
7787 gcc_assert (TREE_CODE (declarator->u.pointer.class_type)
7789 if (declarator->u.pointer.class_type == error_mark_node)
7790 /* We will already have complained. */
7791 type = error_mark_node;
7793 type = build_ptrmem_type (declarator->u.pointer.class_type,
7797 type = build_pointer_type (type);
7799 /* Process a list of type modifier keywords (such as
7800 const or volatile) that were given inside the `*' or `&'. */
7802 if (declarator->u.pointer.qualifiers)
7805 = cp_build_qualified_type (type,
7806 declarator->u.pointer.qualifiers);
7807 type_quals = cp_type_quals (type);
7820 if (unqualified_id && TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR
7821 && TREE_CODE (type) != FUNCTION_TYPE
7822 && TREE_CODE (type) != METHOD_TYPE)
7824 error ("template-id %qD used as a declarator",
7826 unqualified_id = dname;
7829 /* If TYPE is a FUNCTION_TYPE, but the function name was explicitly
7830 qualified with a class-name, turn it into a METHOD_TYPE, unless
7831 we know that the function is static. We take advantage of this
7832 opportunity to do other processing that pertains to entities
7833 explicitly declared to be class members. Note that if DECLARATOR
7834 is non-NULL, we know it is a cdk_id declarator; otherwise, we
7835 would not have exited the loop above. */
7837 && declarator->u.id.qualifying_scope
7838 && TYPE_P (declarator->u.id.qualifying_scope))
7842 ctype = declarator->u.id.qualifying_scope;
7843 ctype = TYPE_MAIN_VARIANT (ctype);
7845 while (t != NULL_TREE && CLASS_TYPE_P (t))
7847 /* You're supposed to have one `template <...>' for every
7848 template class, but you don't need one for a full
7849 specialization. For example:
7851 template <class T> struct S{};
7852 template <> struct S<int> { void f(); };
7853 void S<int>::f () {}
7855 is correct; there shouldn't be a `template <>' for the
7856 definition of `S<int>::f'. */
7857 if (CLASSTYPE_TEMPLATE_SPECIALIZATION (t)
7858 && !any_dependent_template_arguments_p (CLASSTYPE_TI_ARGS (t)))
7859 /* T is an explicit (not partial) specialization. All
7860 containing classes must therefore also be explicitly
7863 if ((CLASSTYPE_USE_TEMPLATE (t) || CLASSTYPE_IS_TEMPLATE (t))
7864 && PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (t)))
7865 template_count += 1;
7867 t = TYPE_MAIN_DECL (t);
7868 t = DECL_CONTEXT (t);
7871 if (ctype == current_class_type)
7874 pedwarn ("member functions are implicitly friends of their class");
7876 pedwarn ("extra qualification %<%T::%> on member %qs",
7879 else if (/* If the qualifying type is already complete, then we
7880 can skip the following checks. */
7881 !COMPLETE_TYPE_P (ctype)
7882 && (/* If the function is being defined, then
7883 qualifying type must certainly be complete. */
7885 /* A friend declaration of "T::f" is OK, even if
7886 "T" is a template parameter. But, if this
7887 function is not a friend, the qualifying type
7889 || (!friendp && !CLASS_TYPE_P (ctype))
7890 /* For a declaration, the type need not be
7891 complete, if either it is dependent (since there
7892 is no meaningful definition of complete in that
7893 case) or the qualifying class is currently being
7895 || !(dependent_type_p (ctype)
7896 || currently_open_class (ctype)))
7897 /* Check that the qualifying type is complete. */
7898 && !complete_type_or_else (ctype, NULL_TREE))
7899 return error_mark_node;
7900 else if (TREE_CODE (type) == FUNCTION_TYPE)
7902 tree sname = declarator->u.id.unqualified_name;
7904 if (current_class_type
7905 && (!friendp || funcdef_flag))
7908 ? "cannot define member function %<%T::%s%> within %<%T%>"
7909 : "cannot declare member function %<%T::%s%> within %<%T%>",
7910 ctype, name, current_class_type);
7911 return error_mark_node;
7914 if (TREE_CODE (sname) == IDENTIFIER_NODE
7915 && NEW_DELETE_OPNAME_P (sname))
7916 /* Overloaded operator new and operator delete
7917 are always static functions. */
7920 type = build_memfn_type (type, ctype, memfn_quals);
7922 else if (declspecs->specs[(int)ds_typedef]
7923 && current_class_type)
7925 error ("cannot declare member %<%T::%s%> within %qT",
7926 ctype, name, current_class_type);
7927 return error_mark_node;
7931 /* Now TYPE has the actual type. */
7936 *attrlist = chainon (returned_attrs, *attrlist);
7938 attrlist = &returned_attrs;
7941 /* Did array size calculations overflow? */
7943 if (TREE_CODE (type) == ARRAY_TYPE
7944 && COMPLETE_TYPE_P (type)
7945 && TREE_CODE (TYPE_SIZE_UNIT (type)) == INTEGER_CST
7946 && TREE_OVERFLOW (TYPE_SIZE_UNIT (type)))
7948 error ("size of array %qs is too large", name);
7949 /* If we proceed with the array type as it is, we'll eventually
7950 crash in tree_low_cst(). */
7951 type = error_mark_node;
7954 if ((decl_context == FIELD || decl_context == PARM)
7955 && !processing_template_decl
7956 && variably_modified_type_p (type, NULL_TREE))
7958 if (decl_context == FIELD)
7959 error ("data member may not have variably modified type %qT", type);
7961 error ("parameter may not have variably modified type %qT", type);
7962 type = error_mark_node;
7965 if (explicitp == 1 || (explicitp && friendp))
7967 /* [dcl.fct.spec] The explicit specifier shall only be used in
7968 declarations of constructors within a class definition. */
7969 error ("only declarations of constructors can be %<explicit%>");
7973 if (storage_class == sc_mutable)
7975 if (decl_context != FIELD || friendp)
7977 error ("non-member %qs cannot be declared %<mutable%>", name);
7978 storage_class = sc_none;
7980 else if (decl_context == TYPENAME || declspecs->specs[(int)ds_typedef])
7982 error ("non-object member %qs cannot be declared %<mutable%>", name);
7983 storage_class = sc_none;
7985 else if (TREE_CODE (type) == FUNCTION_TYPE
7986 || TREE_CODE (type) == METHOD_TYPE)
7988 error ("function %qs cannot be declared %<mutable%>", name);
7989 storage_class = sc_none;
7993 error ("static %qs cannot be declared %<mutable%>", name);
7994 storage_class = sc_none;
7996 else if (type_quals & TYPE_QUAL_CONST)
7998 error ("const %qs cannot be declared %<mutable%>", name);
7999 storage_class = sc_none;
8003 /* If this is declaring a typedef name, return a TYPE_DECL. */
8004 if (declspecs->specs[(int)ds_typedef] && decl_context != TYPENAME)
8008 /* Note that the grammar rejects storage classes
8009 in typenames, fields or parameters. */
8010 if (current_lang_name == lang_name_java)
8011 TYPE_FOR_JAVA (type) = 1;
8013 /* This declaration:
8015 typedef void f(int) const;
8017 declares a function type which is not a member of any
8018 particular class, but which is cv-qualified; for
8019 example "f S::*" declares a pointer to a const-qualified
8020 member function of S. We record the cv-qualification in the
8022 if (memfn_quals && TREE_CODE (type) == FUNCTION_TYPE)
8023 type = cp_build_qualified_type (type, memfn_quals);
8025 if (decl_context == FIELD)
8026 decl = build_lang_decl (TYPE_DECL, unqualified_id, type);
8028 decl = build_decl (TYPE_DECL, unqualified_id, type);
8029 if (id_declarator && declarator->u.id.qualifying_scope)
8030 error ("%Jtypedef name may not be a nested-name-specifier", decl);
8032 if (decl_context != FIELD)
8034 if (!current_function_decl)
8035 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
8036 else if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (current_function_decl)
8037 || (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P
8038 (current_function_decl)))
8039 /* The TYPE_DECL is "abstract" because there will be
8040 clones of this constructor/destructor, and there will
8041 be copies of this TYPE_DECL generated in those
8043 DECL_ABSTRACT (decl) = 1;
8045 else if (constructor_name_p (unqualified_id, current_class_type))
8046 pedwarn ("ISO C++ forbids nested type %qD with same name "
8047 "as enclosing class",
8050 /* If the user declares "typedef struct {...} foo" then the
8051 struct will have an anonymous name. Fill that name in now.
8052 Nothing can refer to it, so nothing needs know about the name
8054 if (type != error_mark_node
8057 && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
8058 && TYPE_ANONYMOUS_P (type)
8059 /* Don't do this if there are attributes. */
8060 && (!attrlist || !*attrlist)
8061 && cp_type_quals (type) == TYPE_UNQUALIFIED)
8063 tree oldname = TYPE_NAME (type);
8066 /* Replace the anonymous name with the real name everywhere. */
8067 for (t = TYPE_MAIN_VARIANT (type); t; t = TYPE_NEXT_VARIANT (t))
8068 if (TYPE_NAME (t) == oldname)
8069 TYPE_NAME (t) = decl;
8071 if (TYPE_LANG_SPECIFIC (type))
8072 TYPE_WAS_ANONYMOUS (type) = 1;
8074 /* If this is a typedef within a template class, the nested
8075 type is a (non-primary) template. The name for the
8076 template needs updating as well. */
8077 if (TYPE_LANG_SPECIFIC (type) && CLASSTYPE_TEMPLATE_INFO (type))
8078 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type))
8079 = TYPE_IDENTIFIER (type);
8081 /* FIXME remangle member functions; member functions of a
8082 type with external linkage have external linkage. */
8085 /* Any qualifiers on a function type typedef have already been
8087 if (memfn_quals && !ctype && TREE_CODE (type) == FUNCTION_TYPE)
8088 memfn_quals = TYPE_UNQUALIFIED;
8091 || (typedef_decl && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl)))
8092 C_TYPEDEF_EXPLICITLY_SIGNED (decl) = 1;
8094 bad_specifiers (decl, "type", virtualp,
8095 memfn_quals != TYPE_UNQUALIFIED,
8096 inlinep, friendp, raises != NULL_TREE);
8101 /* Detect the case of an array type of unspecified size
8102 which came, as such, direct from a typedef name.
8103 We must copy the type, so that the array's domain can be
8104 individually set by the object's initializer. */
8106 if (type && typedef_type
8107 && TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type)
8108 && TYPE_MAIN_VARIANT (type) == TYPE_MAIN_VARIANT (typedef_type))
8109 type = build_cplus_array_type (TREE_TYPE (type), NULL_TREE);
8111 /* Detect where we're using a typedef of function type to declare a
8112 function. PARMS will not be set, so we must create it now. */
8114 if (type == typedef_type && TREE_CODE (type) == FUNCTION_TYPE)
8116 tree decls = NULL_TREE;
8119 for (args = TYPE_ARG_TYPES (type); args; args = TREE_CHAIN (args))
8121 tree decl = cp_build_parm_decl (NULL_TREE, TREE_VALUE (args));
8123 TREE_CHAIN (decl) = decls;
8127 parms = nreverse (decls);
8129 if (decl_context != TYPENAME)
8131 /* A cv-qualifier-seq shall only be part of the function type
8132 for a non-static member function. [8.3.5/4 dcl.fct] */
8133 if (cp_type_quals (type) != TYPE_UNQUALIFIED
8134 && (current_class_type == NULL_TREE || staticp) )
8137 ? G_("qualified function types cannot be used to "
8138 "declare static member functions")
8139 : G_("qualified function types cannot be used to "
8140 "declare free functions"));
8141 type = TYPE_MAIN_VARIANT (type);
8144 /* The qualifiers on the function type become the qualifiers on
8145 the non-static member function. */
8146 memfn_quals |= cp_type_quals (type);
8150 /* If this is a type name (such as, in a cast or sizeof),
8151 compute the type and return it now. */
8153 if (decl_context == TYPENAME)
8155 /* Note that the grammar rejects storage classes
8156 in typenames, fields or parameters. */
8157 if (type_quals != TYPE_UNQUALIFIED)
8158 type_quals = TYPE_UNQUALIFIED;
8160 /* Special case: "friend class foo" looks like a TYPENAME context. */
8163 if (type_quals != TYPE_UNQUALIFIED)
8165 error ("type qualifiers specified for friend class declaration");
8166 type_quals = TYPE_UNQUALIFIED;
8170 error ("%<inline%> specified for friend class declaration");
8176 /* Don't allow friend declaration without a class-key. */
8177 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
8178 pedwarn ("template parameters cannot be friends");
8179 else if (TREE_CODE (type) == TYPENAME_TYPE)
8180 pedwarn ("friend declaration requires class-key, "
8181 "i.e. %<friend class %T::%D%>",
8182 TYPE_CONTEXT (type), TYPENAME_TYPE_FULLNAME (type));
8184 pedwarn ("friend declaration requires class-key, "
8185 "i.e. %<friend %#T%>",
8189 /* Only try to do this stuff if we didn't already give up. */
8190 if (type != integer_type_node)
8192 /* A friendly class? */
8193 if (current_class_type)
8194 make_friend_class (current_class_type, TYPE_MAIN_VARIANT (type),
8197 error ("trying to make class %qT a friend of global scope",
8200 type = void_type_node;
8203 else if (memfn_quals)
8205 if (ctype == NULL_TREE)
8207 if (TREE_CODE (type) != METHOD_TYPE)
8208 error ("invalid qualifiers on non-member function type");
8210 ctype = TYPE_METHOD_BASETYPE (type);
8213 type = build_memfn_type (type, ctype, memfn_quals);
8218 else if (unqualified_id == NULL_TREE && decl_context != PARM
8219 && decl_context != CATCHPARM
8220 && TREE_CODE (type) != UNION_TYPE
8223 error ("abstract declarator %qT used as declaration", type);
8224 return error_mark_node;
8227 /* Only functions may be declared using an operator-function-id. */
8229 && IDENTIFIER_OPNAME_P (unqualified_id)
8230 && TREE_CODE (type) != FUNCTION_TYPE
8231 && TREE_CODE (type) != METHOD_TYPE)
8233 error ("declaration of %qD as non-function", unqualified_id);
8234 return error_mark_node;
8237 /* We don't check parameter types here because we can emit a better
8238 error message later. */
8239 if (decl_context != PARM)
8241 type = check_var_type (unqualified_id, type);
8242 if (type == error_mark_node)
8243 return error_mark_node;
8246 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
8247 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
8249 if (decl_context == PARM || decl_context == CATCHPARM)
8251 if (ctype || in_namespace)
8252 error ("cannot use %<::%> in parameter declaration");
8254 /* A parameter declared as an array of T is really a pointer to T.
8255 One declared as a function is really a pointer to a function.
8256 One declared as a member is really a pointer to member. */
8258 if (TREE_CODE (type) == ARRAY_TYPE)
8260 /* Transfer const-ness of array into that of type pointed to. */
8261 type = build_pointer_type (TREE_TYPE (type));
8262 type_quals = TYPE_UNQUALIFIED;
8264 else if (TREE_CODE (type) == FUNCTION_TYPE)
8265 type = build_pointer_type (type);
8271 if (decl_context == PARM)
8273 decl = cp_build_parm_decl (unqualified_id, type);
8275 bad_specifiers (decl, "parameter", virtualp,
8276 memfn_quals != TYPE_UNQUALIFIED,
8277 inlinep, friendp, raises != NULL_TREE);
8279 else if (decl_context == FIELD)
8281 /* The C99 flexible array extension. */
8282 if (!staticp && TREE_CODE (type) == ARRAY_TYPE
8283 && TYPE_DOMAIN (type) == NULL_TREE)
8285 tree itype = compute_array_index_type (dname, integer_zero_node);
8286 type = build_cplus_array_type (TREE_TYPE (type), itype);
8289 if (type == error_mark_node)
8291 /* Happens when declaring arrays of sizes which
8292 are error_mark_node, for example. */
8295 else if (in_namespace && !friendp)
8297 /* Something like struct S { int N::j; }; */
8298 error ("invalid use of %<::%>");
8299 return error_mark_node;
8301 else if (TREE_CODE (type) == FUNCTION_TYPE)
8304 tree function_context;
8308 if (ctype == NULL_TREE)
8309 ctype = current_class_type;
8311 if (ctype == NULL_TREE)
8313 error ("can't make %qD into a method -- not in a class",
8315 return error_mark_node;
8318 /* ``A union may [ ... ] not [ have ] virtual functions.''
8320 if (virtualp && TREE_CODE (ctype) == UNION_TYPE)
8322 error ("function %qD declared virtual inside a union",
8324 return error_mark_node;
8327 if (NEW_DELETE_OPNAME_P (unqualified_id))
8331 error ("%qD cannot be declared virtual, since it "
8337 else if (staticp < 2)
8338 type = build_memfn_type (type, ctype, memfn_quals);
8341 /* Check that the name used for a destructor makes sense. */
8342 if (sfk == sfk_destructor)
8346 gcc_assert (friendp);
8347 error ("expected qualified name in friend declaration "
8348 "for destructor %qD",
8349 id_declarator->u.id.unqualified_name);
8350 return error_mark_node;
8353 if (!same_type_p (TREE_OPERAND
8354 (id_declarator->u.id.unqualified_name, 0),
8357 error ("declaration of %qD as member of %qT",
8358 id_declarator->u.id.unqualified_name, ctype);
8359 return error_mark_node;
8363 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
8364 function_context = (ctype != NULL_TREE) ?
8365 decl_function_context (TYPE_MAIN_DECL (ctype)) : NULL_TREE;
8366 publicp = (! friendp || ! staticp)
8367 && function_context == NULL_TREE;
8368 decl = grokfndecl (ctype, type,
8369 TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
8370 ? unqualified_id : dname,
8373 virtualp, flags, memfn_quals, raises,
8374 friendp ? -1 : 0, friendp, publicp, inlinep,
8376 funcdef_flag, template_count, in_namespace, attrlist);
8377 if (decl == NULL_TREE)
8378 return error_mark_node;
8380 /* This clobbers the attrs stored in `decl' from `attrlist'. */
8381 /* The decl and setting of decl_attr is also turned off. */
8382 decl = build_decl_attribute_variant (decl, decl_attr);
8385 /* [class.conv.ctor]
8387 A constructor declared without the function-specifier
8388 explicit that can be called with a single parameter
8389 specifies a conversion from the type of its first
8390 parameter to the type of its class. Such a constructor
8391 is called a converting constructor. */
8393 DECL_NONCONVERTING_P (decl) = 1;
8394 else if (DECL_CONSTRUCTOR_P (decl))
8396 /* The constructor can be called with exactly one
8397 parameter if there is at least one parameter, and
8398 any subsequent parameters have default arguments.
8399 Ignore any compiler-added parms. */
8400 tree arg_types = FUNCTION_FIRST_USER_PARMTYPE (decl);
8402 if (arg_types == void_list_node
8404 && TREE_CHAIN (arg_types)
8405 && TREE_CHAIN (arg_types) != void_list_node
8406 && !TREE_PURPOSE (TREE_CHAIN (arg_types))))
8407 DECL_NONCONVERTING_P (decl) = 1;
8410 else if (TREE_CODE (type) == METHOD_TYPE)
8412 /* We only get here for friend declarations of
8413 members of other classes. */
8414 /* All method decls are public, so tell grokfndecl to set
8415 TREE_PUBLIC, also. */
8416 decl = grokfndecl (ctype, type,
8417 TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
8418 ? unqualified_id : dname,
8421 virtualp, flags, memfn_quals, raises,
8422 friendp ? -1 : 0, friendp, 1, 0, sfk,
8423 funcdef_flag, template_count, in_namespace,
8425 if (decl == NULL_TREE)
8426 return error_mark_node;
8428 else if (!staticp && !dependent_type_p (type)
8429 && !COMPLETE_TYPE_P (complete_type (type))
8430 && (TREE_CODE (type) != ARRAY_TYPE || initialized == 0))
8433 error ("field %qD has incomplete type", unqualified_id);
8435 error ("name %qT has incomplete type", type);
8437 /* If we're instantiating a template, tell them which
8438 instantiation made the field's type be incomplete. */
8439 if (current_class_type
8440 && TYPE_NAME (current_class_type)
8441 && IDENTIFIER_TEMPLATE (TYPE_IDENTIFIER (current_class_type))
8443 && declspecs->type == type)
8444 error (" in instantiation of template %qT",
8445 current_class_type);
8447 return error_mark_node;
8453 error ("%qE is neither function nor member function; "
8454 "cannot be declared friend", unqualified_id);
8462 /* Friends are treated specially. */
8463 if (ctype == current_class_type)
8464 ; /* We already issued a pedwarn. */
8465 else if (decl && DECL_NAME (decl))
8467 if (template_class_depth (current_class_type) == 0)
8469 decl = check_explicit_specialization
8470 (unqualified_id, decl, template_count,
8471 2 * funcdef_flag + 4);
8472 if (decl == error_mark_node)
8473 return error_mark_node;
8476 decl = do_friend (ctype, unqualified_id, decl,
8482 return error_mark_node;
8485 /* Structure field. It may not be a function, except for C++. */
8487 if (decl == NULL_TREE)
8493 /* An attempt is being made to initialize a non-static
8494 member. But, from [class.mem]:
8496 4 A member-declarator can contain a
8497 constant-initializer only if it declares a static
8498 member (_class.static_) of integral or enumeration
8499 type, see _class.static.data_.
8501 This used to be relatively common practice, but
8502 the rest of the compiler does not correctly
8503 handle the initialization unless the member is
8504 static so we make it static below. */
8505 pedwarn ("ISO C++ forbids initialization of member %qD",
8507 pedwarn ("making %qD static", unqualified_id);
8511 if (uses_template_parms (type))
8512 /* We'll check at instantiation time. */
8514 else if (check_static_variable_definition (unqualified_id,
8516 /* If we just return the declaration, crashes
8517 will sometimes occur. We therefore return
8518 void_type_node, as if this was a friend
8519 declaration, to cause callers to completely
8520 ignore this declaration. */
8521 return error_mark_node;
8526 /* C++ allows static class members. All other work
8527 for this is done by grokfield. */
8528 decl = build_lang_decl (VAR_DECL, unqualified_id, type);
8529 set_linkage_for_static_data_member (decl);
8530 /* Even if there is an in-class initialization, DECL
8531 is considered undefined until an out-of-class
8532 definition is provided. */
8533 DECL_EXTERNAL (decl) = 1;
8536 DECL_TLS_MODEL (decl) = decl_default_tls_model (decl);
8540 decl = build_decl (FIELD_DECL, unqualified_id, type);
8541 DECL_NONADDRESSABLE_P (decl) = bitfield;
8542 if (bitfield && !unqualified_id)
8543 TREE_NO_WARNING (decl) = 1;
8545 if (storage_class == sc_mutable)
8547 DECL_MUTABLE_P (decl) = 1;
8548 storage_class = sc_none;
8552 bad_specifiers (decl, "field", virtualp,
8553 memfn_quals != TYPE_UNQUALIFIED,
8554 inlinep, friendp, raises != NULL_TREE);
8557 else if (TREE_CODE (type) == FUNCTION_TYPE
8558 || TREE_CODE (type) == METHOD_TYPE)
8563 if (!unqualified_id)
8564 return error_mark_node;
8566 if (TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR)
8567 original_name = dname;
8569 original_name = unqualified_id;
8571 if (storage_class == sc_auto)
8572 error ("storage class %<auto%> invalid for function %qs", name);
8573 else if (storage_class == sc_register)
8574 error ("storage class %<register%> invalid for function %qs", name);
8576 error ("storage class %<__thread%> invalid for function %qs", name);
8578 /* Function declaration not at top level.
8579 Storage classes other than `extern' are not allowed
8580 and `extern' makes no difference. */
8581 if (! toplevel_bindings_p ()
8582 && (storage_class == sc_static
8583 || declspecs->specs[(int)ds_inline])
8586 if (storage_class == sc_static)
8587 pedwarn ("%<static%> specified invalid for function %qs "
8588 "declared out of global scope", name);
8590 pedwarn ("%<inline%> specifier invalid for function %qs "
8591 "declared out of global scope", name);
8594 if (ctype == NULL_TREE)
8598 error ("virtual non-class function %qs", name);
8602 else if (TREE_CODE (type) == FUNCTION_TYPE && staticp < 2
8603 && !NEW_DELETE_OPNAME_P (original_name))
8604 type = build_method_type_directly (ctype,
8606 TYPE_ARG_TYPES (type));
8608 /* Record presence of `static'. */
8609 publicp = (ctype != NULL_TREE
8610 || storage_class == sc_extern
8611 || storage_class != sc_static);
8613 decl = grokfndecl (ctype, type, original_name, parms, unqualified_id,
8614 virtualp, flags, memfn_quals, raises,
8616 publicp, inlinep, sfk, funcdef_flag,
8617 template_count, in_namespace, attrlist);
8618 if (decl == NULL_TREE)
8619 return error_mark_node;
8623 int invalid_static = 0;
8625 /* Don't allow a static member function in a class, and forbid
8626 declaring main to be static. */
8627 if (TREE_CODE (type) == METHOD_TYPE)
8629 pedwarn ("cannot declare member function %qD to have "
8630 "static linkage", decl);
8633 else if (current_function_decl)
8635 /* FIXME need arm citation */
8636 error ("cannot declare static function inside another function");
8643 storage_class = sc_none;
8649 /* It's a variable. */
8651 /* An uninitialized decl with `extern' is a reference. */
8652 decl = grokvardecl (type, unqualified_id,
8655 (type_quals & TYPE_QUAL_CONST) != 0,
8656 ctype ? ctype : in_namespace);
8657 bad_specifiers (decl, "variable", virtualp,
8658 memfn_quals != TYPE_UNQUALIFIED,
8659 inlinep, friendp, raises != NULL_TREE);
8663 DECL_CONTEXT (decl) = ctype;
8666 pedwarn ("%<static%> may not be used when defining "
8667 "(as opposed to declaring) a static data member");
8669 storage_class = sc_none;
8671 if (storage_class == sc_register && TREE_STATIC (decl))
8673 error ("static member %qD declared %<register%>", decl);
8674 storage_class = sc_none;
8676 if (storage_class == sc_extern && pedantic)
8678 pedwarn ("cannot explicitly declare member %q#D to have "
8681 storage_class = sc_none;
8686 /* Record `register' declaration for warnings on &
8687 and in case doing stupid register allocation. */
8689 if (storage_class == sc_register)
8690 DECL_REGISTER (decl) = 1;
8691 else if (storage_class == sc_extern)
8692 DECL_THIS_EXTERN (decl) = 1;
8693 else if (storage_class == sc_static)
8694 DECL_THIS_STATIC (decl) = 1;
8696 /* Record constancy and volatility. There's no need to do this
8697 when processing a template; we'll do this for the instantiated
8698 declaration based on the type of DECL. */
8699 if (!processing_template_decl)
8700 cp_apply_type_quals_to_decl (type_quals, decl);
8703 TREE_NO_WARNING (decl) = 1;
8709 /* Subroutine of start_function. Ensure that each of the parameter
8710 types (as listed in PARMS) is complete, as is required for a
8711 function definition. */
8714 require_complete_types_for_parms (tree parms)
8716 for (; parms; parms = TREE_CHAIN (parms))
8718 if (dependent_type_p (TREE_TYPE (parms)))
8720 if (!VOID_TYPE_P (TREE_TYPE (parms))
8721 && complete_type_or_else (TREE_TYPE (parms), parms))
8723 relayout_decl (parms);
8724 DECL_ARG_TYPE (parms) = type_passed_as (TREE_TYPE (parms));
8727 /* grokparms or complete_type_or_else will have already issued
8729 TREE_TYPE (parms) = error_mark_node;
8733 /* Returns nonzero if T is a local variable. */
8736 local_variable_p (tree t)
8738 if ((TREE_CODE (t) == VAR_DECL
8739 /* A VAR_DECL with a context that is a _TYPE is a static data
8741 && !TYPE_P (CP_DECL_CONTEXT (t))
8742 /* Any other non-local variable must be at namespace scope. */
8743 && !DECL_NAMESPACE_SCOPE_P (t))
8744 || (TREE_CODE (t) == PARM_DECL))
8750 /* Returns nonzero if T is an automatic local variable or a label.
8751 (These are the declarations that need to be remapped when the code
8752 containing them is duplicated.) */
8755 nonstatic_local_decl_p (tree t)
8757 return ((local_variable_p (t) && !TREE_STATIC (t))
8758 || TREE_CODE (t) == LABEL_DECL
8759 || TREE_CODE (t) == RESULT_DECL);
8762 /* Like local_variable_p, but suitable for use as a tree-walking
8766 local_variable_p_walkfn (tree *tp, int *walk_subtrees,
8767 void *data ATTRIBUTE_UNUSED)
8769 if (local_variable_p (*tp) && !DECL_ARTIFICIAL (*tp))
8771 else if (TYPE_P (*tp))
8778 /* Check that ARG, which is a default-argument expression for a
8779 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
8780 something goes wrong. DECL may also be a _TYPE node, rather than a
8781 DECL, if there is no DECL available. */
8784 check_default_argument (tree decl, tree arg)
8789 if (TREE_CODE (arg) == DEFAULT_ARG)
8790 /* We get a DEFAULT_ARG when looking at an in-class declaration
8791 with a default argument. Ignore the argument for now; we'll
8792 deal with it after the class is complete. */
8801 decl_type = TREE_TYPE (decl);
8803 if (arg == error_mark_node
8804 || decl == error_mark_node
8805 || TREE_TYPE (arg) == error_mark_node
8806 || decl_type == error_mark_node)
8807 /* Something already went wrong. There's no need to check
8809 return error_mark_node;
8811 /* [dcl.fct.default]
8813 A default argument expression is implicitly converted to the
8815 if (!TREE_TYPE (arg)
8816 || !can_convert_arg (decl_type, TREE_TYPE (arg), arg, LOOKUP_NORMAL))
8819 error ("default argument for %q#D has type %qT",
8820 decl, TREE_TYPE (arg));
8822 error ("default argument for parameter of type %qT has type %qT",
8823 decl_type, TREE_TYPE (arg));
8825 return error_mark_node;
8828 /* [dcl.fct.default]
8830 Local variables shall not be used in default argument
8833 The keyword `this' shall not be used in a default argument of a
8835 var = walk_tree_without_duplicates (&arg, local_variable_p_walkfn,
8839 error ("default argument %qE uses local variable %qD", arg, var);
8840 return error_mark_node;
8847 /* Decode the list of parameter types for a function type.
8848 Given the list of things declared inside the parens,
8849 return a list of types.
8851 If this parameter does not end with an ellipsis, we append
8854 *PARMS is set to the chain of PARM_DECLs created. */
8857 grokparms (cp_parameter_declarator *first_parm, tree *parms)
8859 tree result = NULL_TREE;
8860 tree decls = NULL_TREE;
8861 int ellipsis = !first_parm || first_parm->ellipsis_p;
8862 cp_parameter_declarator *parm;
8865 for (parm = first_parm; parm != NULL; parm = parm->next)
8867 tree type = NULL_TREE;
8868 tree init = parm->default_argument;
8872 if (parm == no_parameters)
8875 attrs = parm->decl_specifiers.attributes;
8876 parm->decl_specifiers.attributes = NULL_TREE;
8877 decl = grokdeclarator (parm->declarator, &parm->decl_specifiers,
8878 PARM, init != NULL_TREE, &attrs);
8879 if (! decl || TREE_TYPE (decl) == error_mark_node)
8883 cplus_decl_attributes (&decl, attrs, 0);
8885 type = TREE_TYPE (decl);
8886 if (VOID_TYPE_P (type))
8888 if (same_type_p (type, void_type_node)
8889 && DECL_SELF_REFERENCE_P (type)
8890 && !DECL_NAME (decl) && !result && !parm->next && !ellipsis)
8891 /* this is a parmlist of `(void)', which is ok. */
8893 cxx_incomplete_type_error (decl, type);
8894 /* It's not a good idea to actually create parameters of
8895 type `void'; other parts of the compiler assume that a
8896 void type terminates the parameter list. */
8897 type = error_mark_node;
8898 TREE_TYPE (decl) = error_mark_node;
8901 if (type != error_mark_node)
8903 /* Top-level qualifiers on the parameters are
8904 ignored for function types. */
8905 type = cp_build_qualified_type (type, 0);
8906 if (TREE_CODE (type) == METHOD_TYPE)
8908 error ("parameter %qD invalidly declared method type", decl);
8909 type = build_pointer_type (type);
8910 TREE_TYPE (decl) = type;
8912 else if (abstract_virtuals_error (decl, type))
8913 any_error = 1; /* Seems like a good idea. */
8914 else if (POINTER_TYPE_P (type))
8916 /* [dcl.fct]/6, parameter types cannot contain pointers
8917 (references) to arrays of unknown bound. */
8918 tree t = TREE_TYPE (type);
8919 int ptr = TYPE_PTR_P (type);
8925 else if (TREE_CODE (t) != ARRAY_TYPE)
8927 else if (!TYPE_DOMAIN (t))
8931 if (TREE_CODE (t) == ARRAY_TYPE)
8932 error ("parameter %qD includes %s to array of unknown "
8934 decl, ptr ? "pointer" : "reference", t);
8939 else if (init && !processing_template_decl)
8940 init = check_default_argument (decl, init);
8943 TREE_CHAIN (decl) = decls;
8945 result = tree_cons (init, type, result);
8947 decls = nreverse (decls);
8948 result = nreverse (result);
8950 result = chainon (result, void_list_node);
8957 /* D is a constructor or overloaded `operator='.
8959 Let T be the class in which D is declared. Then, this function
8962 -1 if D's is an ill-formed constructor or copy assignment operator
8963 whose first parameter is of type `T'.
8964 0 if D is not a copy constructor or copy assignment
8966 1 if D is a copy constructor or copy assignment operator whose
8967 first parameter is a reference to const qualified T.
8968 2 if D is a copy constructor or copy assignment operator whose
8969 first parameter is a reference to non-const qualified T.
8971 This function can be used as a predicate. Positive values indicate
8972 a copy constructor and nonzero values indicate a copy assignment
8982 gcc_assert (DECL_FUNCTION_MEMBER_P (d));
8984 if (TREE_CODE (d) == TEMPLATE_DECL
8985 || (DECL_TEMPLATE_INFO (d)
8986 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d))))
8987 /* Instantiations of template member functions are never copy
8988 functions. Note that member functions of templated classes are
8989 represented as template functions internally, and we must
8990 accept those as copy functions. */
8993 args = FUNCTION_FIRST_USER_PARMTYPE (d);
8997 arg_type = TREE_VALUE (args);
8998 if (arg_type == error_mark_node)
9001 if (TYPE_MAIN_VARIANT (arg_type) == DECL_CONTEXT (d))
9003 /* Pass by value copy assignment operator. */
9006 else if (TREE_CODE (arg_type) == REFERENCE_TYPE
9007 && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type)) == DECL_CONTEXT (d))
9009 if (CP_TYPE_CONST_P (TREE_TYPE (arg_type)))
9015 args = TREE_CHAIN (args);
9017 if (args && args != void_list_node && !TREE_PURPOSE (args))
9018 /* There are more non-optional args. */
9024 /* Remember any special properties of member function DECL. */
9026 void grok_special_member_properties (tree decl)
9030 if (!DECL_NONSTATIC_MEMBER_FUNCTION_P (decl))
9033 class_type = DECL_CONTEXT (decl);
9034 if (DECL_CONSTRUCTOR_P (decl))
9036 int ctor = copy_fn_p (decl);
9038 TYPE_HAS_CONSTRUCTOR (class_type) = 1;
9044 A non-template constructor for class X is a copy
9045 constructor if its first parameter is of type X&, const
9046 X&, volatile X& or const volatile X&, and either there
9047 are no other parameters or else all other parameters have
9048 default arguments. */
9049 TYPE_HAS_INIT_REF (class_type) = 1;
9051 TYPE_HAS_CONST_INIT_REF (class_type) = 1;
9053 else if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl)))
9054 TYPE_HAS_DEFAULT_CONSTRUCTOR (class_type) = 1;
9056 else if (DECL_OVERLOADED_OPERATOR_P (decl) == NOP_EXPR)
9060 A non-template assignment operator for class X is a copy
9061 assignment operator if its parameter is of type X, X&, const
9062 X&, volatile X& or const volatile X&. */
9064 int assop = copy_fn_p (decl);
9068 TYPE_HAS_ASSIGN_REF (class_type) = 1;
9070 TYPE_HAS_CONST_ASSIGN_REF (class_type) = 1;
9075 /* Check a constructor DECL has the correct form. Complains
9076 if the class has a constructor of the form X(X). */
9079 grok_ctor_properties (tree ctype, tree decl)
9081 int ctor_parm = copy_fn_p (decl);
9087 A declaration of a constructor for a class X is ill-formed if
9088 its first parameter is of type (optionally cv-qualified) X
9089 and either there are no other parameters or else all other
9090 parameters have default arguments.
9092 We *don't* complain about member template instantiations that
9093 have this form, though; they can occur as we try to decide
9094 what constructor to use during overload resolution. Since
9095 overload resolution will never prefer such a constructor to
9096 the non-template copy constructor (which is either explicitly
9097 or implicitly defined), there's no need to worry about their
9098 existence. Theoretically, they should never even be
9099 instantiated, but that's hard to forestall. */
9100 error ("invalid constructor; you probably meant %<%T (const %T&)%>",
9108 /* An operator with this code is unary, but can also be binary. */
9111 ambi_op_p (enum tree_code code)
9113 return (code == INDIRECT_REF
9114 || code == ADDR_EXPR
9115 || code == UNARY_PLUS_EXPR
9116 || code == NEGATE_EXPR
9117 || code == PREINCREMENT_EXPR
9118 || code == PREDECREMENT_EXPR);
9121 /* An operator with this name can only be unary. */
9124 unary_op_p (enum tree_code code)
9126 return (code == TRUTH_NOT_EXPR
9127 || code == BIT_NOT_EXPR
9128 || code == COMPONENT_REF
9129 || code == TYPE_EXPR);
9132 /* DECL is a declaration for an overloaded operator. If COMPLAIN is true,
9133 errors are issued for invalid declarations. */
9136 grok_op_properties (tree decl, bool complain)
9138 tree argtypes = TYPE_ARG_TYPES (TREE_TYPE (decl));
9140 int methodp = (TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE);
9141 tree name = DECL_NAME (decl);
9142 enum tree_code operator_code;
9147 /* Count the number of arguments and check for ellipsis. */
9148 for (argtype = argtypes, arity = 0;
9149 argtype && argtype != void_list_node;
9150 argtype = TREE_CHAIN (argtype))
9152 ellipsis_p = !argtype;
9154 class_type = DECL_CONTEXT (decl);
9155 if (class_type && !CLASS_TYPE_P (class_type))
9156 class_type = NULL_TREE;
9158 if (DECL_CONV_FN_P (decl))
9159 operator_code = TYPE_EXPR;
9163 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
9164 if (ansi_opname (CODE) == name) \
9166 operator_code = (CODE); \
9169 else if (ansi_assopname (CODE) == name) \
9171 operator_code = (CODE); \
9172 DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
9176 #include "operators.def"
9182 gcc_assert (operator_code != LAST_CPLUS_TREE_CODE);
9183 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
9186 switch (operator_code)
9189 TYPE_HAS_NEW_OPERATOR (class_type) = 1;
9193 TYPE_GETS_DELETE (class_type) |= 1;
9197 TYPE_HAS_ARRAY_NEW_OPERATOR (class_type) = 1;
9200 case VEC_DELETE_EXPR:
9201 TYPE_GETS_DELETE (class_type) |= 2;
9208 /* [basic.std.dynamic.allocation]/1:
9210 A program is ill-formed if an allocation function is declared
9211 in a namespace scope other than global scope or declared static
9214 The same also holds true for deallocation functions. */
9215 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR
9216 || operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
9218 if (DECL_NAMESPACE_SCOPE_P (decl))
9220 if (CP_DECL_CONTEXT (decl) != global_namespace)
9222 error ("%qD may not be declared within a namespace", decl);
9225 else if (!TREE_PUBLIC (decl))
9227 error ("%qD may not be declared as static", decl);
9233 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR)
9234 TREE_TYPE (decl) = coerce_new_type (TREE_TYPE (decl));
9235 else if (operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
9236 TREE_TYPE (decl) = coerce_delete_type (TREE_TYPE (decl));
9239 /* An operator function must either be a non-static member function
9240 or have at least one parameter of a class, a reference to a class,
9241 an enumeration, or a reference to an enumeration. 13.4.0.6 */
9242 if (! methodp || DECL_STATIC_FUNCTION_P (decl))
9244 if (operator_code == TYPE_EXPR
9245 || operator_code == CALL_EXPR
9246 || operator_code == COMPONENT_REF
9247 || operator_code == ARRAY_REF
9248 || operator_code == NOP_EXPR)
9250 error ("%qD must be a nonstatic member function", decl);
9257 if (DECL_STATIC_FUNCTION_P (decl))
9259 error ("%qD must be either a non-static member "
9260 "function or a non-member function", decl);
9264 for (p = argtypes; p && p != void_list_node; p = TREE_CHAIN (p))
9266 tree arg = non_reference (TREE_VALUE (p));
9267 if (arg == error_mark_node)
9270 /* IS_AGGR_TYPE, rather than CLASS_TYPE_P, is used
9271 because these checks are performed even on
9272 template functions. */
9273 if (IS_AGGR_TYPE (arg) || TREE_CODE (arg) == ENUMERAL_TYPE)
9277 if (!p || p == void_list_node)
9280 error ("%qD must have an argument of class or "
9281 "enumerated type", decl);
9287 /* There are no restrictions on the arguments to an overloaded
9289 if (operator_code == CALL_EXPR)
9292 /* Warn about conversion operators that will never be used. */
9293 if (IDENTIFIER_TYPENAME_P (name)
9294 && ! DECL_TEMPLATE_INFO (decl)
9296 /* Warn only declaring the function; there is no need to
9297 warn again about out-of-class definitions. */
9298 && class_type == current_class_type)
9300 tree t = TREE_TYPE (name);
9301 int ref = (TREE_CODE (t) == REFERENCE_TYPE);
9302 const char *what = 0;
9305 t = TYPE_MAIN_VARIANT (TREE_TYPE (t));
9307 if (TREE_CODE (t) == VOID_TYPE)
9309 else if (class_type)
9311 if (t == class_type)
9312 what = "the same type";
9313 /* Don't force t to be complete here. */
9314 else if (IS_AGGR_TYPE (t)
9315 && COMPLETE_TYPE_P (t)
9316 && DERIVED_FROM_P (t, class_type))
9317 what = "a base class";
9321 warning (OPT_Wconversion, "conversion to %s%s will never use a type "
9322 "conversion operator",
9323 ref ? "a reference to " : "", what);
9326 if (operator_code == COND_EXPR)
9329 error ("ISO C++ prohibits overloading operator ?:");
9332 else if (ellipsis_p)
9334 error ("%qD must not have variable number of arguments", decl);
9337 else if (ambi_op_p (operator_code))
9340 /* We pick the one-argument operator codes by default, so
9341 we don't have to change anything. */
9343 else if (arity == 2)
9345 /* If we thought this was a unary operator, we now know
9346 it to be a binary operator. */
9347 switch (operator_code)
9350 operator_code = MULT_EXPR;
9354 operator_code = BIT_AND_EXPR;
9357 case UNARY_PLUS_EXPR:
9358 operator_code = PLUS_EXPR;
9362 operator_code = MINUS_EXPR;
9365 case PREINCREMENT_EXPR:
9366 operator_code = POSTINCREMENT_EXPR;
9369 case PREDECREMENT_EXPR:
9370 operator_code = POSTDECREMENT_EXPR;
9377 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
9379 if ((operator_code == POSTINCREMENT_EXPR
9380 || operator_code == POSTDECREMENT_EXPR)
9381 && ! processing_template_decl
9382 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes)), integer_type_node))
9385 error ("postfix %qD must take %<int%> as its argument",
9388 error ("postfix %qD must take %<int%> as its second "
9396 error ("%qD must take either zero or one argument", decl);
9398 error ("%qD must take either one or two arguments", decl);
9402 /* More Effective C++ rule 6. */
9404 && (operator_code == POSTINCREMENT_EXPR
9405 || operator_code == POSTDECREMENT_EXPR
9406 || operator_code == PREINCREMENT_EXPR
9407 || operator_code == PREDECREMENT_EXPR))
9409 tree arg = TREE_VALUE (argtypes);
9410 tree ret = TREE_TYPE (TREE_TYPE (decl));
9411 if (methodp || TREE_CODE (arg) == REFERENCE_TYPE)
9412 arg = TREE_TYPE (arg);
9413 arg = TYPE_MAIN_VARIANT (arg);
9414 if (operator_code == PREINCREMENT_EXPR
9415 || operator_code == PREDECREMENT_EXPR)
9417 if (TREE_CODE (ret) != REFERENCE_TYPE
9418 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret)),
9420 warning (OPT_Weffc__, "prefix %qD should return %qT", decl,
9421 build_reference_type (arg));
9425 if (!same_type_p (TYPE_MAIN_VARIANT (ret), arg))
9426 warning (OPT_Weffc__, "postfix %qD should return %qT", decl, arg);
9430 else if (unary_op_p (operator_code))
9435 error ("%qD must take %<void%>", decl);
9437 error ("%qD must take exactly one argument", decl);
9441 else /* if (binary_op_p (operator_code)) */
9446 error ("%qD must take exactly one argument", decl);
9448 error ("%qD must take exactly two arguments", decl);
9452 /* More Effective C++ rule 7. */
9454 && (operator_code == TRUTH_ANDIF_EXPR
9455 || operator_code == TRUTH_ORIF_EXPR
9456 || operator_code == COMPOUND_EXPR))
9457 warning (OPT_Weffc__, "user-defined %qD always evaluates both arguments",
9461 /* Effective C++ rule 23. */
9464 && !DECL_ASSIGNMENT_OPERATOR_P (decl)
9465 && (operator_code == PLUS_EXPR
9466 || operator_code == MINUS_EXPR
9467 || operator_code == TRUNC_DIV_EXPR
9468 || operator_code == MULT_EXPR
9469 || operator_code == TRUNC_MOD_EXPR)
9470 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl))) == REFERENCE_TYPE)
9471 warning (OPT_Weffc__, "%qD should return by value", decl);
9474 for (; argtypes && argtypes != void_list_node;
9475 argtypes = TREE_CHAIN (argtypes))
9476 if (TREE_PURPOSE (argtypes))
9478 TREE_PURPOSE (argtypes) = NULL_TREE;
9479 if (operator_code == POSTINCREMENT_EXPR
9480 || operator_code == POSTDECREMENT_EXPR)
9483 pedwarn ("%qD cannot have default arguments", decl);
9487 error ("%qD cannot have default arguments", decl);
9495 /* Return a string giving the keyword associate with CODE. */
9498 tag_name (enum tag_types code)
9517 /* Name lookup in an elaborated-type-specifier (after the keyword
9518 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
9519 elaborated-type-specifier is invalid, issue a diagnostic and return
9520 error_mark_node; otherwise, return the *_TYPE to which it referred.
9521 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
9524 check_elaborated_type_specifier (enum tag_types tag_code,
9526 bool allow_template_p)
9532 struct S { struct S *p; };
9534 name lookup will find the TYPE_DECL for the implicit "S::S"
9535 typedef. Adjust for that here. */
9536 if (DECL_SELF_REFERENCE_P (decl))
9537 decl = TYPE_NAME (TREE_TYPE (decl));
9539 type = TREE_TYPE (decl);
9541 /* Check TEMPLATE_TYPE_PARM first because DECL_IMPLICIT_TYPEDEF_P
9542 is false for this case as well. */
9543 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
9545 error ("using template type parameter %qT after %qs",
9546 type, tag_name (tag_code));
9547 return error_mark_node;
9551 If the identifier resolves to a typedef-name or a template
9552 type-parameter, the elaborated-type-specifier is ill-formed.
9554 In other words, the only legitimate declaration to use in the
9555 elaborated type specifier is the implicit typedef created when
9556 the type is declared. */
9557 else if (!DECL_IMPLICIT_TYPEDEF_P (decl)
9558 && tag_code != typename_type)
9560 error ("using typedef-name %qD after %qs", decl, tag_name (tag_code));
9561 error ("%q+D has a previous declaration here", decl);
9562 return error_mark_node;
9564 else if (TREE_CODE (type) != RECORD_TYPE
9565 && TREE_CODE (type) != UNION_TYPE
9566 && tag_code != enum_type
9567 && tag_code != typename_type)
9569 error ("%qT referred to as %qs", type, tag_name (tag_code));
9570 error ("%q+T has a previous declaration here", type);
9571 return error_mark_node;
9573 else if (TREE_CODE (type) != ENUMERAL_TYPE
9574 && tag_code == enum_type)
9576 error ("%qT referred to as enum", type);
9577 error ("%q+T has a previous declaration here", type);
9578 return error_mark_node;
9580 else if (!allow_template_p
9581 && TREE_CODE (type) == RECORD_TYPE
9582 && CLASSTYPE_IS_TEMPLATE (type))
9584 /* If a class template appears as elaborated type specifier
9585 without a template header such as:
9587 template <class T> class C {};
9588 void f(class C); // No template header here
9590 then the required template argument is missing. */
9591 error ("template argument required for %<%s %T%>",
9592 tag_name (tag_code),
9593 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type)));
9594 return error_mark_node;
9600 /* Lookup NAME in elaborate type specifier in scope according to
9601 SCOPE and issue diagnostics if necessary.
9602 Return *_TYPE node upon success, NULL_TREE when the NAME is not
9603 found, and ERROR_MARK_NODE for type error. */
9606 lookup_and_check_tag (enum tag_types tag_code, tree name,
9607 tag_scope scope, bool template_header_p)
9611 if (scope == ts_global)
9613 /* First try ordinary name lookup, ignoring hidden class name
9614 injected via friend declaration. */
9615 decl = lookup_name_prefer_type (name, 2);
9616 /* If that fails, the name will be placed in the smallest
9617 non-class, non-function-prototype scope according to 3.3.1/5.
9618 We may already have a hidden name declared as friend in this
9619 scope. So lookup again but not ignoring hidden names.
9620 If we find one, that name will be made visible rather than
9621 creating a new tag. */
9623 decl = lookup_type_scope (name, ts_within_enclosing_non_class);
9626 decl = lookup_type_scope (name, scope);
9628 if (decl && DECL_CLASS_TEMPLATE_P (decl))
9629 decl = DECL_TEMPLATE_RESULT (decl);
9631 if (decl && TREE_CODE (decl) == TYPE_DECL)
9633 /* Look for invalid nested type:
9637 if (scope == ts_current && DECL_SELF_REFERENCE_P (decl))
9639 error ("%qD has the same name as the class in which it is "
9642 return error_mark_node;
9645 /* Two cases we need to consider when deciding if a class
9646 template is allowed as an elaborated type specifier:
9647 1. It is a self reference to its own class.
9648 2. It comes with a template header.
9652 template <class T> class C {
9653 class C *c1; // DECL_SELF_REFERENCE_P is true
9656 template <class U> class C; // template_header_p is true
9657 template <class T> class C<T>::D {
9658 class C *c2; // DECL_SELF_REFERENCE_P is true
9661 t = check_elaborated_type_specifier (tag_code,
9664 | DECL_SELF_REFERENCE_P (decl));
9671 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
9672 Define the tag as a forward-reference if it is not defined.
9674 If a declaration is given, process it here, and report an error if
9675 multiple declarations are not identical.
9677 SCOPE is TS_CURRENT when this is also a definition. Only look in
9678 the current frame for the name (since C++ allows new names in any
9679 scope.) It is TS_WITHIN_ENCLOSING_NON_CLASS if this is a friend
9680 declaration. Only look beginning from the current scope outward up
9681 till the nearest non-class scope. Otherwise it is TS_GLOBAL.
9683 TEMPLATE_HEADER_P is true when this declaration is preceded by
9684 a set of template parameters. */
9687 xref_tag (enum tag_types tag_code, tree name,
9688 tag_scope scope, bool template_header_p)
9690 enum tree_code code;
9692 tree context = NULL_TREE;
9694 timevar_push (TV_NAME_LOOKUP);
9696 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
9708 code = ENUMERAL_TYPE;
9714 /* In case of anonymous name, xref_tag is only called to
9715 make type node and push name. Name lookup is not required. */
9716 if (ANON_AGGRNAME_P (name))
9719 t = lookup_and_check_tag (tag_code, name,
9720 scope, template_header_p);
9722 if (t == error_mark_node)
9723 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
9725 if (scope != ts_current && t && current_class_type
9726 && template_class_depth (current_class_type)
9727 && template_header_p)
9729 /* Since SCOPE is not TS_CURRENT, we are not looking at a
9730 definition of this tag. Since, in addition, we are currently
9731 processing a (member) template declaration of a template
9732 class, we must be very careful; consider:
9739 { template <class V>
9740 friend struct S1; };
9742 Here, the S2::S1 declaration should not be confused with the
9743 outer declaration. In particular, the inner version should
9744 have a template parameter of level 2, not level 1. This
9745 would be particularly important if the member declaration
9748 template <class V = U> friend struct S1;
9750 say, when we should tsubst into `U' when instantiating
9751 S2. On the other hand, when presented with:
9761 we must find the inner binding eventually. We
9762 accomplish this by making sure that the new type we
9763 create to represent this declaration has the right
9765 context = TYPE_CONTEXT (t);
9771 /* If no such tag is yet defined, create a forward-reference node
9772 and record it as the "definition".
9773 When a real declaration of this type is found,
9774 the forward-reference will be altered into a real type. */
9775 if (code == ENUMERAL_TYPE)
9777 error ("use of enum %q#D without previous declaration", name);
9778 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
9782 t = make_aggr_type (code);
9783 TYPE_CONTEXT (t) = context;
9784 t = pushtag (name, t, scope);
9789 if (template_header_p && IS_AGGR_TYPE (t))
9791 if (!redeclare_class_template (t, current_template_parms))
9792 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
9794 else if (!processing_template_decl
9796 && CLASSTYPE_IS_TEMPLATE (t))
9798 error ("redeclaration of %qT as a non-template", t);
9799 error ("previous declaration %q+D", t);
9800 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
9803 /* Make injected friend class visible. */
9804 if (scope != ts_within_enclosing_non_class
9805 && hidden_name_p (TYPE_NAME (t)))
9807 DECL_ANTICIPATED (TYPE_NAME (t)) = 0;
9808 DECL_FRIEND_P (TYPE_NAME (t)) = 0;
9810 if (TYPE_TEMPLATE_INFO (t))
9812 DECL_ANTICIPATED (TYPE_TI_TEMPLATE (t)) = 0;
9813 DECL_FRIEND_P (TYPE_TI_TEMPLATE (t)) = 0;
9818 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, t);
9822 xref_tag_from_type (tree old, tree id, tag_scope scope)
9824 enum tag_types tag_kind;
9826 if (TREE_CODE (old) == RECORD_TYPE)
9827 tag_kind = (CLASSTYPE_DECLARED_CLASS (old) ? class_type : record_type);
9829 tag_kind = union_type;
9831 if (id == NULL_TREE)
9832 id = TYPE_IDENTIFIER (old);
9834 return xref_tag (tag_kind, id, scope, false);
9837 /* Create the binfo hierarchy for REF with (possibly NULL) base list
9838 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
9839 access_* node, and the TREE_VALUE is the type of the base-class.
9840 Non-NULL TREE_TYPE indicates virtual inheritance.
9842 Returns true if the binfo hierarchy was successfully created,
9843 false if an error was detected. */
9846 xref_basetypes (tree ref, tree base_list)
9849 tree binfo, base_binfo;
9850 unsigned max_vbases = 0; /* Maximum direct & indirect virtual bases. */
9851 unsigned max_bases = 0; /* Maximum direct bases. */
9853 tree default_access;
9854 tree igo_prev; /* Track Inheritance Graph Order. */
9856 if (ref == error_mark_node)
9859 /* The base of a derived class is private by default, all others are
9861 default_access = (TREE_CODE (ref) == RECORD_TYPE
9862 && CLASSTYPE_DECLARED_CLASS (ref)
9863 ? access_private_node : access_public_node);
9865 /* First, make sure that any templates in base-classes are
9866 instantiated. This ensures that if we call ourselves recursively
9867 we do not get confused about which classes are marked and which
9872 tree basetype = TREE_VALUE (*basep);
9874 if (!(processing_template_decl && uses_template_parms (basetype))
9875 && !complete_type_or_else (basetype, NULL))
9876 /* An incomplete type. Remove it from the list. */
9877 *basep = TREE_CHAIN (*basep);
9881 if (TREE_TYPE (*basep))
9883 if (CLASS_TYPE_P (basetype))
9884 max_vbases += VEC_length (tree, CLASSTYPE_VBASECLASSES (basetype));
9885 basep = &TREE_CHAIN (*basep);
9889 TYPE_MARKED_P (ref) = 1;
9891 /* The binfo slot should be empty, unless this is an (ill-formed)
9893 gcc_assert (!TYPE_BINFO (ref) || TYPE_SIZE (ref));
9894 gcc_assert (TYPE_MAIN_VARIANT (ref) == ref);
9896 binfo = make_tree_binfo (max_bases);
9898 TYPE_BINFO (ref) = binfo;
9899 BINFO_OFFSET (binfo) = size_zero_node;
9900 BINFO_TYPE (binfo) = ref;
9904 BINFO_BASE_ACCESSES (binfo) = VEC_alloc (tree, gc, max_bases);
9905 /* An aggregate cannot have baseclasses. */
9906 CLASSTYPE_NON_AGGREGATE (ref) = 1;
9908 if (TREE_CODE (ref) == UNION_TYPE)
9910 error ("derived union %qT invalid", ref);
9917 if (TYPE_FOR_JAVA (ref))
9919 error ("Java class %qT cannot have multiple bases", ref);
9926 CLASSTYPE_VBASECLASSES (ref) = VEC_alloc (tree, gc, max_vbases);
9928 if (TYPE_FOR_JAVA (ref))
9930 error ("Java class %qT cannot have virtual bases", ref);
9935 for (igo_prev = binfo; base_list; base_list = TREE_CHAIN (base_list))
9937 tree access = TREE_PURPOSE (base_list);
9938 int via_virtual = TREE_TYPE (base_list) != NULL_TREE;
9939 tree basetype = TREE_VALUE (base_list);
9941 if (access == access_default_node)
9942 access = default_access;
9944 if (TREE_CODE (basetype) == TYPE_DECL)
9945 basetype = TREE_TYPE (basetype);
9946 if (TREE_CODE (basetype) != RECORD_TYPE
9947 && TREE_CODE (basetype) != TYPENAME_TYPE
9948 && TREE_CODE (basetype) != TEMPLATE_TYPE_PARM
9949 && TREE_CODE (basetype) != BOUND_TEMPLATE_TEMPLATE_PARM)
9951 error ("base type %qT fails to be a struct or class type",
9956 if (TYPE_FOR_JAVA (basetype) && (current_lang_depth () == 0))
9957 TYPE_FOR_JAVA (ref) = 1;
9959 base_binfo = NULL_TREE;
9960 if (CLASS_TYPE_P (basetype) && !dependent_type_p (basetype))
9962 base_binfo = TYPE_BINFO (basetype);
9963 /* The original basetype could have been a typedef'd type. */
9964 basetype = BINFO_TYPE (base_binfo);
9966 /* Inherit flags from the base. */
9967 TYPE_HAS_NEW_OPERATOR (ref)
9968 |= TYPE_HAS_NEW_OPERATOR (basetype);
9969 TYPE_HAS_ARRAY_NEW_OPERATOR (ref)
9970 |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype);
9971 TYPE_GETS_DELETE (ref) |= TYPE_GETS_DELETE (basetype);
9972 TYPE_HAS_CONVERSION (ref) |= TYPE_HAS_CONVERSION (basetype);
9973 CLASSTYPE_DIAMOND_SHAPED_P (ref)
9974 |= CLASSTYPE_DIAMOND_SHAPED_P (basetype);
9975 CLASSTYPE_REPEATED_BASE_P (ref)
9976 |= CLASSTYPE_REPEATED_BASE_P (basetype);
9979 /* We must do this test after we've seen through a typedef
9981 if (TYPE_MARKED_P (basetype))
9983 if (basetype == ref)
9984 error ("recursive type %qT undefined", basetype);
9986 error ("duplicate base type %qT invalid", basetype);
9989 TYPE_MARKED_P (basetype) = 1;
9991 base_binfo = copy_binfo (base_binfo, basetype, ref,
9992 &igo_prev, via_virtual);
9993 if (!BINFO_INHERITANCE_CHAIN (base_binfo))
9994 BINFO_INHERITANCE_CHAIN (base_binfo) = binfo;
9996 BINFO_BASE_APPEND (binfo, base_binfo);
9997 BINFO_BASE_ACCESS_APPEND (binfo, access);
10000 if (VEC_space (tree, CLASSTYPE_VBASECLASSES (ref), 1))
10001 /* If we have space in the vbase vector, we must have shared at
10002 least one of them, and are therefore diamond shaped. */
10003 CLASSTYPE_DIAMOND_SHAPED_P (ref) = 1;
10005 /* Unmark all the types. */
10006 for (i = 0; BINFO_BASE_ITERATE (binfo, i, base_binfo); i++)
10007 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
10008 TYPE_MARKED_P (ref) = 0;
10010 /* Now see if we have a repeated base type. */
10011 if (!CLASSTYPE_REPEATED_BASE_P (ref))
10013 for (base_binfo = binfo; base_binfo;
10014 base_binfo = TREE_CHAIN (base_binfo))
10016 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
10018 CLASSTYPE_REPEATED_BASE_P (ref) = 1;
10021 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 1;
10023 for (base_binfo = binfo; base_binfo;
10024 base_binfo = TREE_CHAIN (base_binfo))
10025 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
10026 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
10035 /* Begin compiling the definition of an enumeration type.
10037 Returns the type object, as yet incomplete.
10038 Also records info about it so that build_enumerator
10039 may be used to declare the individual values as they are read. */
10042 start_enum (tree name)
10046 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
10048 /* If this is the real definition for a previous forward reference,
10049 fill in the contents in the same object that used to be the
10050 forward reference. */
10052 enumtype = lookup_and_check_tag (enum_type, name,
10053 /*tag_scope=*/ts_current,
10054 /*template_header_p=*/false);
10056 if (enumtype != NULL_TREE && TREE_CODE (enumtype) == ENUMERAL_TYPE)
10058 error ("multiple definition of %q#T", enumtype);
10059 error ("%Jprevious definition here", TYPE_MAIN_DECL (enumtype));
10060 /* Clear out TYPE_VALUES, and start again. */
10061 TYPE_VALUES (enumtype) = NULL_TREE;
10065 /* In case of error, make a dummy enum to allow parsing to
10067 if (enumtype == error_mark_node)
10068 name = make_anon_name ();
10070 enumtype = make_node (ENUMERAL_TYPE);
10071 enumtype = pushtag (name, enumtype, /*tag_scope=*/ts_current);
10077 /* After processing and defining all the values of an enumeration type,
10078 install their decls in the enumeration type and finish it off.
10079 ENUMTYPE is the type object and VALUES a list of name-value pairs. */
10082 finish_enum (tree enumtype)
10091 bool use_short_enum;
10095 integer_type_kind itk;
10096 tree underlying_type = NULL_TREE;
10098 /* We built up the VALUES in reverse order. */
10099 TYPE_VALUES (enumtype) = nreverse (TYPE_VALUES (enumtype));
10101 /* For an enum defined in a template, just set the type of the values;
10102 all further processing is postponed until the template is
10103 instantiated. We need to set the type so that tsubst of a CONST_DECL
10105 if (processing_template_decl)
10107 for (values = TYPE_VALUES (enumtype);
10109 values = TREE_CHAIN (values))
10110 TREE_TYPE (TREE_VALUE (values)) = enumtype;
10111 if (at_function_scope_p ())
10112 add_stmt (build_min (TAG_DEFN, enumtype));
10116 /* Determine the minimum and maximum values of the enumerators. */
10117 if (TYPE_VALUES (enumtype))
10119 minnode = maxnode = NULL_TREE;
10121 for (values = TYPE_VALUES (enumtype);
10123 values = TREE_CHAIN (values))
10125 decl = TREE_VALUE (values);
10127 /* [dcl.enum]: Following the closing brace of an enum-specifier,
10128 each enumerator has the type of its enumeration. Prior to the
10129 closing brace, the type of each enumerator is the type of its
10130 initializing value. */
10131 TREE_TYPE (decl) = enumtype;
10133 /* Update the minimum and maximum values, if appropriate. */
10134 value = DECL_INITIAL (decl);
10135 if (value == error_mark_node)
10136 value = integer_zero_node;
10137 /* Figure out what the minimum and maximum values of the
10138 enumerators are. */
10140 minnode = maxnode = value;
10141 else if (tree_int_cst_lt (maxnode, value))
10143 else if (tree_int_cst_lt (value, minnode))
10150 If the enumerator-list is empty, the underlying type is as if
10151 the enumeration had a single enumerator with value 0. */
10152 minnode = maxnode = integer_zero_node;
10154 /* Compute the number of bits require to represent all values of the
10155 enumeration. We must do this before the type of MINNODE and
10156 MAXNODE are transformed, since min_precision relies on the
10157 TREE_TYPE of the value it is passed. */
10158 unsignedp = tree_int_cst_sgn (minnode) >= 0;
10159 lowprec = min_precision (minnode, unsignedp);
10160 highprec = min_precision (maxnode, unsignedp);
10161 precision = MAX (lowprec, highprec);
10163 /* Determine the underlying type of the enumeration.
10167 The underlying type of an enumeration is an integral type that
10168 can represent all the enumerator values defined in the
10169 enumeration. It is implementation-defined which integral type is
10170 used as the underlying type for an enumeration except that the
10171 underlying type shall not be larger than int unless the value of
10172 an enumerator cannot fit in an int or unsigned int.
10174 We use "int" or an "unsigned int" as the underlying type, even if
10175 a smaller integral type would work, unless the user has
10176 explicitly requested that we use the smallest possible type. The
10177 user can request that for all enumerations with a command line
10178 flag, or for just one enumeration with an attribute. */
10180 use_short_enum = flag_short_enums
10181 || lookup_attribute ("packed", TYPE_ATTRIBUTES (enumtype));
10183 for (itk = (use_short_enum ? itk_char : itk_int);
10187 underlying_type = integer_types[itk];
10188 if (TYPE_PRECISION (underlying_type) >= precision
10189 && TYPE_UNSIGNED (underlying_type) == unsignedp)
10192 if (itk == itk_none)
10196 IF no integral type can represent all the enumerator values, the
10197 enumeration is ill-formed. */
10198 error ("no integral type can represent all of the enumerator values "
10199 "for %qT", enumtype);
10200 precision = TYPE_PRECISION (long_long_integer_type_node);
10201 underlying_type = integer_types[itk_unsigned_long_long];
10204 /* Compute the minium and maximum values for the type.
10208 For an enumeration where emin is the smallest enumerator and emax
10209 is the largest, the values of the enumeration are the values of the
10210 underlying type in the range bmin to bmax, where bmin and bmax are,
10211 respectively, the smallest and largest values of the smallest bit-
10212 field that can store emin and emax. */
10214 /* The middle-end currently assumes that types with TYPE_PRECISION
10215 narrower than their underlying type are suitably zero or sign
10216 extended to fill their mode. g++ doesn't make these guarantees.
10217 Until the middle-end can represent such paradoxical types, we
10218 set the TYPE_PRECISION to the width of the underlying type. */
10219 TYPE_PRECISION (enumtype) = TYPE_PRECISION (underlying_type);
10221 set_min_and_max_values_for_integral_type (enumtype, precision, unsignedp);
10225 The value of sizeof() applied to an enumeration type, an object
10226 of an enumeration type, or an enumerator, is the value of sizeof()
10227 applied to the underlying type. */
10228 TYPE_SIZE (enumtype) = TYPE_SIZE (underlying_type);
10229 TYPE_SIZE_UNIT (enumtype) = TYPE_SIZE_UNIT (underlying_type);
10230 TYPE_MODE (enumtype) = TYPE_MODE (underlying_type);
10231 TYPE_ALIGN (enumtype) = TYPE_ALIGN (underlying_type);
10232 TYPE_USER_ALIGN (enumtype) = TYPE_USER_ALIGN (underlying_type);
10233 TYPE_UNSIGNED (enumtype) = TYPE_UNSIGNED (underlying_type);
10235 /* Convert each of the enumerators to the type of the underlying
10236 type of the enumeration. */
10237 for (values = TYPE_VALUES (enumtype); values; values = TREE_CHAIN (values))
10239 location_t saved_location;
10241 decl = TREE_VALUE (values);
10242 saved_location = input_location;
10243 input_location = DECL_SOURCE_LOCATION (decl);
10244 value = perform_implicit_conversion (underlying_type,
10245 DECL_INITIAL (decl));
10246 input_location = saved_location;
10248 /* Do not clobber shared ints. */
10249 value = copy_node (value);
10251 TREE_TYPE (value) = enumtype;
10252 DECL_INITIAL (decl) = value;
10253 TREE_VALUE (values) = value;
10256 /* Fix up all variant types of this enum type. */
10257 for (t = TYPE_MAIN_VARIANT (enumtype); t; t = TYPE_NEXT_VARIANT (t))
10259 TYPE_VALUES (t) = TYPE_VALUES (enumtype);
10260 TYPE_MIN_VALUE (t) = TYPE_MIN_VALUE (enumtype);
10261 TYPE_MAX_VALUE (t) = TYPE_MAX_VALUE (enumtype);
10262 TYPE_SIZE (t) = TYPE_SIZE (enumtype);
10263 TYPE_SIZE_UNIT (t) = TYPE_SIZE_UNIT (enumtype);
10264 TYPE_MODE (t) = TYPE_MODE (enumtype);
10265 TYPE_PRECISION (t) = TYPE_PRECISION (enumtype);
10266 TYPE_ALIGN (t) = TYPE_ALIGN (enumtype);
10267 TYPE_USER_ALIGN (t) = TYPE_USER_ALIGN (enumtype);
10268 TYPE_UNSIGNED (t) = TYPE_UNSIGNED (enumtype);
10271 /* Finish debugging output for this type. */
10272 rest_of_type_compilation (enumtype, namespace_bindings_p ());
10275 /* Build and install a CONST_DECL for an enumeration constant of the
10276 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
10277 Assignment of sequential values by default is handled here. */
10280 build_enumerator (tree name, tree value, tree enumtype)
10286 /* If the VALUE was erroneous, pretend it wasn't there; that will
10287 result in the enum being assigned the next value in sequence. */
10288 if (value == error_mark_node)
10291 /* Remove no-op casts from the value. */
10293 STRIP_TYPE_NOPS (value);
10295 if (! processing_template_decl)
10297 /* Validate and default VALUE. */
10298 if (value != NULL_TREE)
10300 value = integral_constant_value (value);
10302 if (TREE_CODE (value) == INTEGER_CST)
10304 value = perform_integral_promotions (value);
10305 constant_expression_warning (value);
10309 error ("enumerator value for %qD is not an integer constant", name);
10314 /* Default based on previous value. */
10315 if (value == NULL_TREE)
10317 if (TYPE_VALUES (enumtype))
10320 unsigned HOST_WIDE_INT lo;
10324 /* The next value is the previous value plus one. We can
10325 safely assume that the previous value is an INTEGER_CST.
10326 add_double doesn't know the type of the target expression,
10327 so we must check with int_fits_type_p as well. */
10328 prev_value = DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype)));
10329 overflowed = add_double (TREE_INT_CST_LOW (prev_value),
10330 TREE_INT_CST_HIGH (prev_value),
10332 value = build_int_cst_wide (TREE_TYPE (prev_value), lo, hi);
10333 overflowed |= !int_fits_type_p (value, TREE_TYPE (prev_value));
10337 error ("overflow in enumeration values at %qD", name);
10338 value = error_mark_node;
10342 value = integer_zero_node;
10345 /* Remove no-op casts from the value. */
10346 STRIP_TYPE_NOPS (value);
10349 /* C++ associates enums with global, function, or class declarations. */
10350 context = current_scope ();
10352 /* Build the actual enumeration constant. Note that the enumeration
10353 constants have the type of their initializers until the
10354 enumeration is complete:
10358 Following the closing brace of an enum-specifier, each enumer-
10359 ator has the type of its enumeration. Prior to the closing
10360 brace, the type of each enumerator is the type of its
10361 initializing value.
10363 In finish_enum we will reset the type. Of course, if we're
10364 processing a template, there may be no value. */
10365 type = value ? TREE_TYPE (value) : NULL_TREE;
10367 if (context && context == current_class_type)
10368 /* This enum declaration is local to the class. We need the full
10369 lang_decl so that we can record DECL_CLASS_CONTEXT, for example. */
10370 decl = build_lang_decl (CONST_DECL, name, type);
10372 /* It's a global enum, or it's local to a function. (Note local to
10373 a function could mean local to a class method. */
10374 decl = build_decl (CONST_DECL, name, type);
10376 DECL_CONTEXT (decl) = FROB_CONTEXT (context);
10377 TREE_CONSTANT (decl) = 1;
10378 TREE_INVARIANT (decl) = 1;
10379 TREE_READONLY (decl) = 1;
10380 DECL_INITIAL (decl) = value;
10382 if (context && context == current_class_type)
10383 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
10384 on the TYPE_FIELDS list for `S'. (That's so that you can say
10385 things like `S::i' later.) */
10386 finish_member_declaration (decl);
10390 /* Add this enumeration constant to the list for this type. */
10391 TYPE_VALUES (enumtype) = tree_cons (name, decl, TYPE_VALUES (enumtype));
10395 /* We're defining DECL. Make sure that it's type is OK. */
10398 check_function_type (tree decl, tree current_function_parms)
10400 tree fntype = TREE_TYPE (decl);
10401 tree return_type = complete_type (TREE_TYPE (fntype));
10403 /* In a function definition, arg types must be complete. */
10404 require_complete_types_for_parms (current_function_parms);
10406 if (dependent_type_p (return_type))
10408 if (!COMPLETE_OR_VOID_TYPE_P (return_type))
10410 tree args = TYPE_ARG_TYPES (fntype);
10412 error ("return type %q#T is incomplete", return_type);
10414 /* Make it return void instead. */
10415 if (TREE_CODE (fntype) == METHOD_TYPE)
10416 fntype = build_method_type_directly (TREE_TYPE (TREE_VALUE (args)),
10418 TREE_CHAIN (args));
10420 fntype = build_function_type (void_type_node, args);
10422 = build_exception_variant (fntype,
10423 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (decl)));
10426 abstract_virtuals_error (decl, TREE_TYPE (fntype));
10429 /* Create the FUNCTION_DECL for a function definition.
10430 DECLSPECS and DECLARATOR are the parts of the declaration;
10431 they describe the function's name and the type it returns,
10432 but twisted together in a fashion that parallels the syntax of C.
10434 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
10435 DECLARATOR is really the DECL for the function we are about to
10436 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
10437 indicating that the function is an inline defined in-class.
10439 This function creates a binding context for the function body
10440 as well as setting up the FUNCTION_DECL in current_function_decl.
10442 For C++, we must first check whether that datum makes any sense.
10443 For example, "class A local_a(1,2);" means that variable local_a
10444 is an aggregate of type A, which should have a constructor
10445 applied to it with the argument list [1, 2].
10447 On entry, DECL_INITIAL (decl1) should be NULL_TREE or error_mark_node,
10448 or may be a BLOCK if the function has been defined previously
10449 in this translation unit. On exit, DECL_INITIAL (decl1) will be
10450 error_mark_node if the function has never been defined, or
10451 a BLOCK if the function has been defined somewhere. */
10454 start_preparsed_function (tree decl1, tree attrs, int flags)
10456 tree ctype = NULL_TREE;
10459 int doing_friend = 0;
10460 struct cp_binding_level *bl;
10461 tree current_function_parms;
10462 struct c_fileinfo *finfo
10463 = get_fileinfo (LOCATION_FILE (DECL_SOURCE_LOCATION (decl1)));
10464 bool honor_interface;
10466 /* Sanity check. */
10467 gcc_assert (TREE_CODE (TREE_VALUE (void_list_node)) == VOID_TYPE);
10468 gcc_assert (TREE_CHAIN (void_list_node) == NULL_TREE);
10470 fntype = TREE_TYPE (decl1);
10471 if (TREE_CODE (fntype) == METHOD_TYPE)
10472 ctype = TYPE_METHOD_BASETYPE (fntype);
10474 /* ISO C++ 11.4/5. A friend function defined in a class is in
10475 the (lexical) scope of the class in which it is defined. */
10476 if (!ctype && DECL_FRIEND_P (decl1))
10478 ctype = DECL_FRIEND_CONTEXT (decl1);
10480 /* CTYPE could be null here if we're dealing with a template;
10481 for example, `inline friend float foo()' inside a template
10482 will have no CTYPE set. */
10483 if (ctype && TREE_CODE (ctype) != RECORD_TYPE)
10489 if (DECL_DECLARED_INLINE_P (decl1)
10490 && lookup_attribute ("noinline", attrs))
10491 warning (0, "inline function %q+D given attribute noinline", decl1);
10493 if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1))
10494 /* This is a constructor, we must ensure that any default args
10495 introduced by this definition are propagated to the clones
10496 now. The clones are used directly in overload resolution. */
10497 adjust_clone_args (decl1);
10499 /* Sometimes we don't notice that a function is a static member, and
10500 build a METHOD_TYPE for it. Fix that up now. */
10501 if (ctype != NULL_TREE && DECL_STATIC_FUNCTION_P (decl1)
10502 && TREE_CODE (TREE_TYPE (decl1)) == METHOD_TYPE)
10504 revert_static_member_fn (decl1);
10508 /* Set up current_class_type, and enter the scope of the class, if
10511 push_nested_class (ctype);
10512 else if (DECL_STATIC_FUNCTION_P (decl1))
10513 push_nested_class (DECL_CONTEXT (decl1));
10515 /* Now that we have entered the scope of the class, we must restore
10516 the bindings for any template parameters surrounding DECL1, if it
10517 is an inline member template. (Order is important; consider the
10518 case where a template parameter has the same name as a field of
10519 the class.) It is not until after this point that
10520 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
10521 if (flags & SF_INCLASS_INLINE)
10522 maybe_begin_member_template_processing (decl1);
10524 /* Effective C++ rule 15. */
10526 && DECL_OVERLOADED_OPERATOR_P (decl1) == NOP_EXPR
10527 && TREE_CODE (TREE_TYPE (fntype)) == VOID_TYPE)
10528 warning (OPT_Weffc__, "%<operator=%> should return a reference to %<*this%>");
10530 /* Make the init_value nonzero so pushdecl knows this is not tentative.
10531 error_mark_node is replaced below (in poplevel) with the BLOCK. */
10532 if (!DECL_INITIAL (decl1))
10533 DECL_INITIAL (decl1) = error_mark_node;
10535 /* This function exists in static storage.
10536 (This does not mean `static' in the C sense!) */
10537 TREE_STATIC (decl1) = 1;
10539 /* We must call push_template_decl after current_class_type is set
10540 up. (If we are processing inline definitions after exiting a
10541 class scope, current_class_type will be NULL_TREE until set above
10542 by push_nested_class.) */
10543 if (processing_template_decl)
10545 /* FIXME: Handle error_mark_node more gracefully. */
10546 tree newdecl1 = push_template_decl (decl1);
10547 if (newdecl1 != error_mark_node)
10551 /* We are now in the scope of the function being defined. */
10552 current_function_decl = decl1;
10554 /* Save the parm names or decls from this function's declarator
10555 where store_parm_decls will find them. */
10556 current_function_parms = DECL_ARGUMENTS (decl1);
10558 /* Make sure the parameter and return types are reasonable. When
10559 you declare a function, these types can be incomplete, but they
10560 must be complete when you define the function. */
10561 check_function_type (decl1, current_function_parms);
10563 /* Build the return declaration for the function. */
10564 restype = TREE_TYPE (fntype);
10565 /* Promote the value to int before returning it. */
10566 if (c_promoting_integer_type_p (restype))
10567 restype = type_promotes_to (restype);
10568 if (DECL_RESULT (decl1) == NULL_TREE)
10572 resdecl = build_decl (RESULT_DECL, 0, TYPE_MAIN_VARIANT (restype));
10573 DECL_ARTIFICIAL (resdecl) = 1;
10574 DECL_IGNORED_P (resdecl) = 1;
10575 DECL_RESULT (decl1) = resdecl;
10577 cp_apply_type_quals_to_decl (cp_type_quals (restype), resdecl);
10580 /* Let the user know we're compiling this function. */
10581 announce_function (decl1);
10583 /* Record the decl so that the function name is defined.
10584 If we already have a decl for this name, and it is a FUNCTION_DECL,
10585 use the old decl. */
10586 if (!processing_template_decl && !(flags & SF_PRE_PARSED))
10588 /* A specialization is not used to guide overload resolution. */
10589 if (!DECL_FUNCTION_MEMBER_P (decl1)
10590 && !(DECL_USE_TEMPLATE (decl1) &&
10591 PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl1))))
10593 tree olddecl = pushdecl (decl1);
10595 if (olddecl == error_mark_node)
10596 /* If something went wrong when registering the declaration,
10597 use DECL1; we have to have a FUNCTION_DECL to use when
10598 parsing the body of the function. */
10602 /* Otherwise, OLDDECL is either a previous declaration
10603 of the same function or DECL1 itself. */
10605 if (warn_missing_declarations
10606 && olddecl == decl1
10607 && !DECL_MAIN_P (decl1)
10608 && TREE_PUBLIC (decl1)
10609 && !DECL_DECLARED_INLINE_P (decl1))
10613 /* Check whether DECL1 is in an anonymous
10615 for (context = DECL_CONTEXT (decl1);
10617 context = DECL_CONTEXT (context))
10619 if (TREE_CODE (context) == NAMESPACE_DECL
10620 && DECL_NAME (context) == NULL_TREE)
10624 if (context == NULL)
10625 warning (OPT_Wmissing_declarations,
10626 "no previous declaration for %q+D", decl1);
10634 /* We need to set the DECL_CONTEXT. */
10635 if (!DECL_CONTEXT (decl1) && DECL_TEMPLATE_INFO (decl1))
10636 DECL_CONTEXT (decl1) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1));
10638 fntype = TREE_TYPE (decl1);
10640 /* If #pragma weak applies, mark the decl appropriately now.
10641 The pragma only applies to global functions. Because
10642 determining whether or not the #pragma applies involves
10643 computing the mangled name for the declaration, we cannot
10644 apply the pragma until after we have merged this declaration
10645 with any previous declarations; if the original declaration
10646 has a linkage specification, that specification applies to
10647 the definition as well, and may affect the mangled name. */
10648 if (!DECL_CONTEXT (decl1))
10649 maybe_apply_pragma_weak (decl1);
10652 /* Reset this in case the call to pushdecl changed it. */
10653 current_function_decl = decl1;
10655 gcc_assert (DECL_INITIAL (decl1));
10657 /* This function may already have been parsed, in which case just
10658 return; our caller will skip over the body without parsing. */
10659 if (DECL_INITIAL (decl1) != error_mark_node)
10662 /* Initialize RTL machinery. We cannot do this until
10663 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
10664 even when processing a template; this is how we get
10665 CFUN set up, and our per-function variables initialized.
10666 FIXME factor out the non-RTL stuff. */
10667 bl = current_binding_level;
10668 allocate_struct_function (decl1);
10669 current_binding_level = bl;
10671 /* Even though we're inside a function body, we still don't want to
10672 call expand_expr to calculate the size of a variable-sized array.
10673 We haven't necessarily assigned RTL to all variables yet, so it's
10674 not safe to try to expand expressions involving them. */
10675 cfun->x_dont_save_pending_sizes_p = 1;
10677 /* Start the statement-tree, start the tree now. */
10678 DECL_SAVED_TREE (decl1) = push_stmt_list ();
10680 /* If we are (erroneously) defining a function that we have already
10681 defined before, wipe out what we knew before. */
10682 if (!DECL_PENDING_INLINE_P (decl1))
10683 DECL_SAVED_FUNCTION_DATA (decl1) = NULL;
10685 if (ctype && !doing_friend && !DECL_STATIC_FUNCTION_P (decl1))
10687 /* We know that this was set up by `grokclassfn'. We do not
10688 wait until `store_parm_decls', since evil parse errors may
10689 never get us to that point. Here we keep the consistency
10690 between `current_class_type' and `current_class_ptr'. */
10691 tree t = DECL_ARGUMENTS (decl1);
10693 gcc_assert (t != NULL_TREE && TREE_CODE (t) == PARM_DECL);
10694 gcc_assert (TREE_CODE (TREE_TYPE (t)) == POINTER_TYPE);
10696 cp_function_chain->x_current_class_ref
10697 = build_indirect_ref (t, NULL);
10698 cp_function_chain->x_current_class_ptr = t;
10700 /* Constructors and destructors need to know whether they're "in
10701 charge" of initializing virtual base classes. */
10702 t = TREE_CHAIN (t);
10703 if (DECL_HAS_IN_CHARGE_PARM_P (decl1))
10705 current_in_charge_parm = t;
10706 t = TREE_CHAIN (t);
10708 if (DECL_HAS_VTT_PARM_P (decl1))
10710 gcc_assert (DECL_NAME (t) == vtt_parm_identifier);
10711 current_vtt_parm = t;
10715 honor_interface = (!DECL_TEMPLATE_INSTANTIATION (decl1)
10716 /* Implicitly-defined methods (like the
10717 destructor for a class in which no destructor
10718 is explicitly declared) must not be defined
10719 until their definition is needed. So, we
10720 ignore interface specifications for
10721 compiler-generated functions. */
10722 && !DECL_ARTIFICIAL (decl1));
10724 if (DECL_INTERFACE_KNOWN (decl1))
10726 tree ctx = decl_function_context (decl1);
10728 if (DECL_NOT_REALLY_EXTERN (decl1))
10729 DECL_EXTERNAL (decl1) = 0;
10731 if (ctx != NULL_TREE && DECL_DECLARED_INLINE_P (ctx)
10732 && TREE_PUBLIC (ctx))
10733 /* This is a function in a local class in an extern inline
10735 comdat_linkage (decl1);
10737 /* If this function belongs to an interface, it is public.
10738 If it belongs to someone else's interface, it is also external.
10739 This only affects inlines and template instantiations. */
10740 else if (!finfo->interface_unknown && honor_interface)
10742 if (DECL_DECLARED_INLINE_P (decl1)
10743 || DECL_TEMPLATE_INSTANTIATION (decl1)
10744 || processing_template_decl)
10746 DECL_EXTERNAL (decl1)
10747 = (finfo->interface_only
10748 || (DECL_DECLARED_INLINE_P (decl1)
10749 && ! flag_implement_inlines
10750 && !DECL_VINDEX (decl1)));
10752 /* For WIN32 we also want to put these in linkonce sections. */
10753 maybe_make_one_only (decl1);
10756 DECL_EXTERNAL (decl1) = 0;
10757 DECL_INTERFACE_KNOWN (decl1) = 1;
10758 /* If this function is in an interface implemented in this file,
10759 make sure that the back end knows to emit this function
10761 if (!DECL_EXTERNAL (decl1))
10762 mark_needed (decl1);
10764 else if (finfo->interface_unknown && finfo->interface_only
10765 && honor_interface)
10767 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
10768 interface, we will have both finfo->interface_unknown and
10769 finfo->interface_only set. In that case, we don't want to
10770 use the normal heuristics because someone will supply a
10771 #pragma implementation elsewhere, and deducing it here would
10772 produce a conflict. */
10773 comdat_linkage (decl1);
10774 DECL_EXTERNAL (decl1) = 0;
10775 DECL_INTERFACE_KNOWN (decl1) = 1;
10776 DECL_DEFER_OUTPUT (decl1) = 1;
10780 /* This is a definition, not a reference.
10781 So clear DECL_EXTERNAL. */
10782 DECL_EXTERNAL (decl1) = 0;
10784 if ((DECL_DECLARED_INLINE_P (decl1)
10785 || DECL_TEMPLATE_INSTANTIATION (decl1))
10786 && ! DECL_INTERFACE_KNOWN (decl1)
10787 /* Don't try to defer nested functions for now. */
10788 && ! decl_function_context (decl1))
10789 DECL_DEFER_OUTPUT (decl1) = 1;
10791 DECL_INTERFACE_KNOWN (decl1) = 1;
10794 /* Determine the ELF visibility attribute for the function. We must not
10795 do this before calling "pushdecl", as we must allow "duplicate_decls"
10796 to merge any attributes appropriately. We also need to wait until
10798 if (!DECL_CLONED_FUNCTION_P (decl1))
10799 determine_visibility (decl1);
10801 begin_scope (sk_function_parms, decl1);
10805 if (DECL_DESTRUCTOR_P (decl1)
10806 || (DECL_CONSTRUCTOR_P (decl1)
10807 && targetm.cxx.cdtor_returns_this ()))
10809 cdtor_label = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
10810 DECL_CONTEXT (cdtor_label) = current_function_decl;
10813 start_fname_decls ();
10815 store_parm_decls (current_function_parms);
10819 /* Like start_preparsed_function, except that instead of a
10820 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
10822 Returns 1 on success. If the DECLARATOR is not suitable for a function
10823 (it defines a datum instead), we return 0, which tells
10824 yyparse to report a parse error. */
10827 start_function (cp_decl_specifier_seq *declspecs,
10828 const cp_declarator *declarator,
10833 decl1 = grokdeclarator (declarator, declspecs, FUNCDEF, 1, &attrs);
10834 /* If the declarator is not suitable for a function definition,
10835 cause a syntax error. */
10836 if (decl1 == NULL_TREE || TREE_CODE (decl1) != FUNCTION_DECL)
10839 if (DECL_MAIN_P (decl1))
10840 /* main must return int. grokfndecl should have corrected it
10841 (and issued a diagnostic) if the user got it wrong. */
10842 gcc_assert (same_type_p (TREE_TYPE (TREE_TYPE (decl1)),
10843 integer_type_node));
10845 start_preparsed_function (decl1, attrs, /*flags=*/SF_DEFAULT);
10850 /* Returns true iff an EH_SPEC_BLOCK should be created in the body of
10854 use_eh_spec_block (tree fn)
10856 return (flag_exceptions && flag_enforce_eh_specs
10857 && !processing_template_decl
10858 && TYPE_RAISES_EXCEPTIONS (TREE_TYPE (fn))
10859 /* We insert the EH_SPEC_BLOCK only in the original
10860 function; then, it is copied automatically to the
10862 && !DECL_CLONED_FUNCTION_P (fn)
10863 /* Implicitly-generated constructors and destructors have
10864 exception specifications. However, those specifications
10865 are the union of the possible exceptions specified by the
10866 constructors/destructors for bases and members, so no
10867 unallowed exception will ever reach this function. By
10868 not creating the EH_SPEC_BLOCK we save a little memory,
10869 and we avoid spurious warnings about unreachable
10871 && !DECL_ARTIFICIAL (fn));
10874 /* Store the parameter declarations into the current function declaration.
10875 This is called after parsing the parameter declarations, before
10876 digesting the body of the function.
10878 Also install to binding contour return value identifier, if any. */
10881 store_parm_decls (tree current_function_parms)
10883 tree fndecl = current_function_decl;
10886 /* This is a chain of any other decls that came in among the parm
10887 declarations. If a parm is declared with enum {foo, bar} x;
10888 then CONST_DECLs for foo and bar are put here. */
10889 tree nonparms = NULL_TREE;
10891 if (current_function_parms)
10893 /* This case is when the function was defined with an ANSI prototype.
10894 The parms already have decls, so we need not do anything here
10895 except record them as in effect
10896 and complain if any redundant old-style parm decls were written. */
10898 tree specparms = current_function_parms;
10901 /* Must clear this because it might contain TYPE_DECLs declared
10903 current_binding_level->names = NULL;
10905 /* If we're doing semantic analysis, then we'll call pushdecl
10906 for each of these. We must do them in reverse order so that
10907 they end in the correct forward order. */
10908 specparms = nreverse (specparms);
10910 for (parm = specparms; parm; parm = next)
10912 next = TREE_CHAIN (parm);
10913 if (TREE_CODE (parm) == PARM_DECL)
10915 if (DECL_NAME (parm) == NULL_TREE
10916 || TREE_CODE (parm) != VOID_TYPE)
10919 error ("parameter %qD declared void", parm);
10923 /* If we find an enum constant or a type tag,
10924 put it aside for the moment. */
10925 TREE_CHAIN (parm) = NULL_TREE;
10926 nonparms = chainon (nonparms, parm);
10930 /* Get the decls in their original chain order and record in the
10931 function. This is all and only the PARM_DECLs that were
10932 pushed into scope by the loop above. */
10933 DECL_ARGUMENTS (fndecl) = getdecls ();
10936 DECL_ARGUMENTS (fndecl) = NULL_TREE;
10938 /* Now store the final chain of decls for the arguments
10939 as the decl-chain of the current lexical scope.
10940 Put the enumerators in as well, at the front so that
10941 DECL_ARGUMENTS is not modified. */
10942 current_binding_level->names = chainon (nonparms, DECL_ARGUMENTS (fndecl));
10944 if (use_eh_spec_block (current_function_decl))
10945 current_eh_spec_block = begin_eh_spec_block ();
10949 /* We have finished doing semantic analysis on DECL, but have not yet
10950 generated RTL for its body. Save away our current state, so that
10951 when we want to generate RTL later we know what to do. */
10954 save_function_data (tree decl)
10956 struct language_function *f;
10958 /* Save the language-specific per-function data so that we can
10959 get it back when we really expand this function. */
10960 gcc_assert (!DECL_PENDING_INLINE_P (decl));
10963 f = GGC_NEW (struct language_function);
10964 memcpy (f, cp_function_chain, sizeof (struct language_function));
10965 DECL_SAVED_FUNCTION_DATA (decl) = f;
10967 /* Clear out the bits we don't need. */
10968 f->base.x_stmt_tree.x_cur_stmt_list = NULL_TREE;
10969 f->bindings = NULL;
10970 f->x_local_names = NULL;
10974 /* Set the return value of the constructor (if present). */
10977 finish_constructor_body (void)
10982 if (targetm.cxx.cdtor_returns_this ())
10984 /* Any return from a constructor will end up here. */
10985 add_stmt (build_stmt (LABEL_EXPR, cdtor_label));
10987 val = DECL_ARGUMENTS (current_function_decl);
10988 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
10989 DECL_RESULT (current_function_decl), val);
10990 /* Return the address of the object. */
10991 exprstmt = build_stmt (RETURN_EXPR, val);
10992 add_stmt (exprstmt);
10996 /* Do all the processing for the beginning of a destructor; set up the
10997 vtable pointers and cleanups for bases and members. */
11000 begin_destructor_body (void)
11002 tree compound_stmt;
11004 /* If the CURRENT_CLASS_TYPE is incomplete, we will have already
11005 issued an error message. We still want to try to process the
11006 body of the function, but initialize_vtbl_ptrs will crash if
11007 TYPE_BINFO is NULL. */
11008 if (COMPLETE_TYPE_P (current_class_type))
11010 compound_stmt = begin_compound_stmt (0);
11011 /* Make all virtual function table pointers in non-virtual base
11012 classes point to CURRENT_CLASS_TYPE's virtual function
11014 initialize_vtbl_ptrs (current_class_ptr);
11015 finish_compound_stmt (compound_stmt);
11017 /* And insert cleanups for our bases and members so that they
11018 will be properly destroyed if we throw. */
11019 push_base_cleanups ();
11023 /* At the end of every destructor we generate code to delete the object if
11024 necessary. Do that now. */
11027 finish_destructor_body (void)
11031 /* Any return from a destructor will end up here; that way all base
11032 and member cleanups will be run when the function returns. */
11033 add_stmt (build_stmt (LABEL_EXPR, cdtor_label));
11035 /* In a virtual destructor, we must call delete. */
11036 if (DECL_VIRTUAL_P (current_function_decl))
11039 tree virtual_size = cxx_sizeof (current_class_type);
11043 At the point of definition of a virtual destructor (including
11044 an implicit definition), non-placement operator delete shall
11045 be looked up in the scope of the destructor's class and if
11046 found shall be accessible and unambiguous. */
11047 exprstmt = build_op_delete_call(DELETE_EXPR, current_class_ptr,
11049 /*global_p=*/false,
11050 /*placement=*/NULL_TREE,
11051 /*alloc_fn=*/NULL_TREE);
11053 if_stmt = begin_if_stmt ();
11054 finish_if_stmt_cond (build2 (BIT_AND_EXPR, integer_type_node,
11055 current_in_charge_parm,
11058 finish_expr_stmt (exprstmt);
11059 finish_then_clause (if_stmt);
11060 finish_if_stmt (if_stmt);
11063 if (targetm.cxx.cdtor_returns_this ())
11067 val = DECL_ARGUMENTS (current_function_decl);
11068 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
11069 DECL_RESULT (current_function_decl), val);
11070 /* Return the address of the object. */
11071 exprstmt = build_stmt (RETURN_EXPR, val);
11072 add_stmt (exprstmt);
11076 /* Do the necessary processing for the beginning of a function body, which
11077 in this case includes member-initializers, but not the catch clauses of
11078 a function-try-block. Currently, this means opening a binding level
11079 for the member-initializers (in a ctor) and member cleanups (in a dtor). */
11082 begin_function_body (void)
11086 if (! FUNCTION_NEEDS_BODY_BLOCK (current_function_decl))
11089 if (processing_template_decl)
11090 /* Do nothing now. */;
11092 /* Always keep the BLOCK node associated with the outermost pair of
11093 curly braces of a function. These are needed for correct
11094 operation of dwarfout.c. */
11095 keep_next_level (true);
11097 stmt = begin_compound_stmt (BCS_FN_BODY);
11099 if (processing_template_decl)
11100 /* Do nothing now. */;
11101 else if (DECL_DESTRUCTOR_P (current_function_decl))
11102 begin_destructor_body ();
11107 /* Do the processing for the end of a function body. Currently, this means
11108 closing out the cleanups for fully-constructed bases and members, and in
11109 the case of the destructor, deleting the object if desired. Again, this
11110 is only meaningful for [cd]tors, since they are the only functions where
11111 there is a significant distinction between the main body and any
11112 function catch clauses. Handling, say, main() return semantics here
11113 would be wrong, as flowing off the end of a function catch clause for
11114 main() would also need to return 0. */
11117 finish_function_body (tree compstmt)
11119 if (compstmt == NULL_TREE)
11122 /* Close the block. */
11123 finish_compound_stmt (compstmt);
11125 if (processing_template_decl)
11126 /* Do nothing now. */;
11127 else if (DECL_CONSTRUCTOR_P (current_function_decl))
11128 finish_constructor_body ();
11129 else if (DECL_DESTRUCTOR_P (current_function_decl))
11130 finish_destructor_body ();
11133 /* Given a function, returns the BLOCK corresponding to the outermost level
11134 of curly braces, skipping the artificial block created for constructor
11138 outer_curly_brace_block (tree fndecl)
11140 tree block = BLOCK_SUBBLOCKS (DECL_INITIAL (fndecl));
11141 if (FUNCTION_NEEDS_BODY_BLOCK (current_function_decl))
11142 /* Skip the artificial function body block. */
11143 block = BLOCK_SUBBLOCKS (block);
11147 /* Finish up a function declaration and compile that function
11148 all the way to assembler language output. The free the storage
11149 for the function definition.
11151 FLAGS is a bitwise or of the following values:
11153 We just finished processing the body of an in-class inline
11154 function definition. (This processing will have taken place
11155 after the class definition is complete.) */
11158 finish_function (int flags)
11160 tree fndecl = current_function_decl;
11161 tree fntype, ctype = NULL_TREE;
11162 int inclass_inline = (flags & 2) != 0;
11165 /* When we get some parse errors, we can end up without a
11166 current_function_decl, so cope. */
11167 if (fndecl == NULL_TREE)
11168 return error_mark_node;
11170 if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fndecl)
11171 && DECL_VIRTUAL_P (fndecl)
11172 && !processing_template_decl)
11174 tree fnclass = DECL_CONTEXT (fndecl);
11175 if (fndecl == CLASSTYPE_KEY_METHOD (fnclass))
11176 keyed_classes = tree_cons (NULL_TREE, fnclass, keyed_classes);
11179 nested = function_depth > 1;
11180 fntype = TREE_TYPE (fndecl);
11182 /* TREE_READONLY (fndecl) = 1;
11183 This caused &foo to be of type ptr-to-const-function
11184 which then got a warning when stored in a ptr-to-function variable. */
11186 gcc_assert (building_stmt_tree ());
11187 /* The current function is being defined, so its DECL_INITIAL should
11188 be set, and unless there's a multiple definition, it should be
11189 error_mark_node. */
11190 gcc_assert (DECL_INITIAL (fndecl) == error_mark_node);
11192 /* For a cloned function, we've already got all the code we need;
11193 there's no need to add any extra bits. */
11194 if (!DECL_CLONED_FUNCTION_P (fndecl))
11196 if (DECL_MAIN_P (current_function_decl))
11200 /* Make it so that `main' always returns 0 by default (or
11203 stmt = finish_return_stmt (integer_one_node);
11205 stmt = finish_return_stmt (integer_zero_node);
11207 /* Hack. We don't want the middle-end to warn that this
11208 return is unreachable, so put the statement on the
11210 #ifdef USE_MAPPED_LOCATION
11211 SET_EXPR_LOCATION (stmt, UNKNOWN_LOCATION);
11213 annotate_with_file_line (stmt, input_filename, 0);
11217 if (use_eh_spec_block (current_function_decl))
11218 finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
11219 (TREE_TYPE (current_function_decl)),
11220 current_eh_spec_block);
11223 /* If we're saving up tree structure, tie off the function now. */
11224 DECL_SAVED_TREE (fndecl) = pop_stmt_list (DECL_SAVED_TREE (fndecl));
11226 finish_fname_decls ();
11228 /* If this function can't throw any exceptions, remember that. */
11229 if (!processing_template_decl
11230 && !cp_function_chain->can_throw
11231 && !flag_non_call_exceptions
11232 && !DECL_REPLACEABLE_P (fndecl))
11233 TREE_NOTHROW (fndecl) = 1;
11235 /* This must come after expand_function_end because cleanups might
11236 have declarations (from inline functions) that need to go into
11237 this function's blocks. */
11239 /* If the current binding level isn't the outermost binding level
11240 for this function, either there is a bug, or we have experienced
11241 syntax errors and the statement tree is malformed. */
11242 if (current_binding_level->kind != sk_function_parms)
11244 /* Make sure we have already experienced errors. */
11245 gcc_assert (errorcount);
11247 /* Throw away the broken statement tree and extra binding
11249 DECL_SAVED_TREE (fndecl) = alloc_stmt_list ();
11251 while (current_binding_level->kind != sk_function_parms)
11253 if (current_binding_level->kind == sk_class)
11254 pop_nested_class ();
11256 poplevel (0, 0, 0);
11259 poplevel (1, 0, 1);
11261 /* Statements should always be full-expressions at the outermost set
11262 of curly braces for a function. */
11263 gcc_assert (stmts_are_full_exprs_p ());
11265 /* Set up the named return value optimization, if we can. Candidate
11266 variables are selected in check_return_value. */
11267 if (current_function_return_value)
11269 tree r = current_function_return_value;
11272 if (r != error_mark_node
11273 /* This is only worth doing for fns that return in memory--and
11274 simpler, since we don't have to worry about promoted modes. */
11275 && aggregate_value_p (TREE_TYPE (TREE_TYPE (fndecl)), fndecl)
11276 /* Only allow this for variables declared in the outer scope of
11277 the function so we know that their lifetime always ends with a
11278 return; see g++.dg/opt/nrv6.C. We could be more flexible if
11279 we were to do this optimization in tree-ssa. */
11280 && (outer = outer_curly_brace_block (fndecl))
11281 && chain_member (r, BLOCK_VARS (outer)))
11282 finalize_nrv (&DECL_SAVED_TREE (fndecl), r, DECL_RESULT (fndecl));
11284 current_function_return_value = NULL_TREE;
11287 /* Remember that we were in class scope. */
11288 if (current_class_name)
11289 ctype = current_class_type;
11291 /* Must mark the RESULT_DECL as being in this function. */
11292 DECL_CONTEXT (DECL_RESULT (fndecl)) = fndecl;
11294 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
11295 to the FUNCTION_DECL node itself. */
11296 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl)) = fndecl;
11298 /* Save away current state, if appropriate. */
11299 if (!processing_template_decl)
11300 save_function_data (fndecl);
11302 /* Complain if there's just no return statement. */
11303 if (warn_return_type
11304 && TREE_CODE (TREE_TYPE (fntype)) != VOID_TYPE
11305 && !dependent_type_p (TREE_TYPE (fntype))
11306 && !current_function_returns_value && !current_function_returns_null
11307 /* Don't complain if we abort or throw. */
11308 && !current_function_returns_abnormally
11309 && !DECL_NAME (DECL_RESULT (fndecl))
11310 /* Normally, with -Wreturn-type, flow will complain. Unless we're an
11311 inline function, as we might never be compiled separately. */
11312 && (DECL_INLINE (fndecl) || processing_template_decl)
11313 /* Structor return values (if any) are set by the compiler. */
11314 && !DECL_CONSTRUCTOR_P (fndecl)
11315 && !DECL_DESTRUCTOR_P (fndecl))
11316 warning (OPT_Wreturn_type, "no return statement in function returning non-void");
11318 /* Store the end of the function, so that we get good line number
11319 info for the epilogue. */
11320 cfun->function_end_locus = input_location;
11322 /* Genericize before inlining. */
11323 if (!processing_template_decl)
11325 struct language_function *f = DECL_SAVED_FUNCTION_DATA (fndecl);
11326 cp_genericize (fndecl);
11327 /* Clear out the bits we don't need. */
11328 f->x_current_class_ptr = NULL;
11329 f->x_current_class_ref = NULL;
11330 f->x_eh_spec_block = NULL;
11331 f->x_in_charge_parm = NULL;
11332 f->x_vtt_parm = NULL;
11333 f->x_return_value = NULL;
11334 f->bindings = NULL;
11335 f->extern_decl_map = NULL;
11337 /* Handle attribute((warn_unused_result)). Relies on gimple input. */
11338 c_warn_unused_result (&DECL_SAVED_TREE (fndecl));
11340 /* Clear out the bits we don't need. */
11341 local_names = NULL;
11343 /* We're leaving the context of this function, so zap cfun. It's still in
11344 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
11346 current_function_decl = NULL;
11348 /* If this is an in-class inline definition, we may have to pop the
11349 bindings for the template parameters that we added in
11350 maybe_begin_member_template_processing when start_function was
11352 if (inclass_inline)
11353 maybe_end_member_template_processing ();
11355 /* Leave the scope of the class. */
11357 pop_nested_class ();
11363 /* Let the error reporting routines know that we're outside a
11364 function. For a nested function, this value is used in
11365 cxx_pop_function_context and then reset via pop_function_context. */
11366 current_function_decl = NULL_TREE;
11371 /* Create the FUNCTION_DECL for a function definition.
11372 DECLSPECS and DECLARATOR are the parts of the declaration;
11373 they describe the return type and the name of the function,
11374 but twisted together in a fashion that parallels the syntax of C.
11376 This function creates a binding context for the function body
11377 as well as setting up the FUNCTION_DECL in current_function_decl.
11379 Returns a FUNCTION_DECL on success.
11381 If the DECLARATOR is not suitable for a function (it defines a datum
11382 instead), we return 0, which tells yyparse to report a parse error.
11384 May return void_type_node indicating that this method is actually
11385 a friend. See grokfield for more details.
11387 Came here with a `.pushlevel' .
11389 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
11390 CHANGES TO CODE IN `grokfield'. */
11393 start_method (cp_decl_specifier_seq *declspecs,
11394 const cp_declarator *declarator, tree attrlist)
11396 tree fndecl = grokdeclarator (declarator, declspecs, MEMFUNCDEF, 0,
11399 if (fndecl == error_mark_node)
11400 return error_mark_node;
11402 if (fndecl == NULL || TREE_CODE (fndecl) != FUNCTION_DECL)
11404 error ("invalid member function declaration");
11405 return error_mark_node;
11409 cplus_decl_attributes (&fndecl, attrlist, 0);
11411 /* Pass friends other than inline friend functions back. */
11412 if (fndecl == void_type_node)
11415 if (DECL_IN_AGGR_P (fndecl))
11417 if (DECL_CONTEXT (fndecl)
11418 && TREE_CODE (DECL_CONTEXT (fndecl)) != NAMESPACE_DECL)
11419 error ("%qD is already defined in class %qT", fndecl,
11420 DECL_CONTEXT (fndecl));
11421 return error_mark_node;
11424 check_template_shadow (fndecl);
11426 DECL_DECLARED_INLINE_P (fndecl) = 1;
11427 if (flag_default_inline)
11428 DECL_INLINE (fndecl) = 1;
11430 /* We process method specializations in finish_struct_1. */
11431 if (processing_template_decl && !DECL_TEMPLATE_SPECIALIZATION (fndecl))
11433 fndecl = push_template_decl (fndecl);
11434 if (fndecl == error_mark_node)
11438 if (! DECL_FRIEND_P (fndecl))
11440 if (TREE_CHAIN (fndecl))
11442 fndecl = copy_node (fndecl);
11443 TREE_CHAIN (fndecl) = NULL_TREE;
11447 finish_decl (fndecl, NULL_TREE, NULL_TREE);
11449 /* Make a place for the parms. */
11450 begin_scope (sk_function_parms, fndecl);
11452 DECL_IN_AGGR_P (fndecl) = 1;
11456 /* Go through the motions of finishing a function definition.
11457 We don't compile this method until after the whole class has
11460 FINISH_METHOD must return something that looks as though it
11461 came from GROKFIELD (since we are defining a method, after all).
11463 This is called after parsing the body of the function definition.
11464 STMTS is the chain of statements that makes up the function body.
11466 DECL is the ..._DECL that `start_method' provided. */
11469 finish_method (tree decl)
11471 tree fndecl = decl;
11476 if (decl == void_type_node)
11479 old_initial = DECL_INITIAL (fndecl);
11481 /* Undo the level for the parms (from start_method).
11482 This is like poplevel, but it causes nothing to be
11483 saved. Saving information here confuses symbol-table
11484 output routines. Besides, this information will
11485 be correctly output when this method is actually
11488 /* Clear out the meanings of the local variables of this level;
11489 also record in each decl which block it belongs to. */
11491 for (link = current_binding_level->names; link; link = TREE_CHAIN (link))
11493 if (DECL_NAME (link) != NULL_TREE)
11494 pop_binding (DECL_NAME (link), link);
11495 gcc_assert (TREE_CODE (link) != FUNCTION_DECL);
11496 DECL_CONTEXT (link) = NULL_TREE;
11499 poplevel (0, 0, 0);
11501 DECL_INITIAL (fndecl) = old_initial;
11503 /* We used to check if the context of FNDECL was different from
11504 current_class_type as another way to get inside here. This didn't work
11505 for String.cc in libg++. */
11506 if (DECL_FRIEND_P (fndecl))
11508 VEC_safe_push (tree, gc, CLASSTYPE_INLINE_FRIENDS (current_class_type),
11510 decl = void_type_node;
11517 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
11518 we can lay it out later, when and if its type becomes complete. */
11521 maybe_register_incomplete_var (tree var)
11523 gcc_assert (TREE_CODE (var) == VAR_DECL);
11525 /* Keep track of variables with incomplete types. */
11526 if (!processing_template_decl && TREE_TYPE (var) != error_mark_node
11527 && DECL_EXTERNAL (var))
11529 tree inner_type = TREE_TYPE (var);
11531 while (TREE_CODE (inner_type) == ARRAY_TYPE)
11532 inner_type = TREE_TYPE (inner_type);
11533 inner_type = TYPE_MAIN_VARIANT (inner_type);
11535 if ((!COMPLETE_TYPE_P (inner_type) && CLASS_TYPE_P (inner_type))
11536 /* RTTI TD entries are created while defining the type_info. */
11537 || (TYPE_LANG_SPECIFIC (inner_type)
11538 && TYPE_BEING_DEFINED (inner_type)))
11539 incomplete_vars = tree_cons (inner_type, var, incomplete_vars);
11543 /* Called when a class type (given by TYPE) is defined. If there are
11544 any existing VAR_DECLs whose type hsa been completed by this
11545 declaration, update them now. */
11548 complete_vars (tree type)
11550 tree *list = &incomplete_vars;
11552 gcc_assert (CLASS_TYPE_P (type));
11555 if (same_type_p (type, TREE_PURPOSE (*list)))
11557 tree var = TREE_VALUE (*list);
11558 tree type = TREE_TYPE (var);
11559 /* Complete the type of the variable. The VAR_DECL itself
11560 will be laid out in expand_expr. */
11561 complete_type (type);
11562 cp_apply_type_quals_to_decl (cp_type_quals (type), var);
11563 /* Remove this entry from the list. */
11564 *list = TREE_CHAIN (*list);
11567 list = &TREE_CHAIN (*list);
11570 /* Check for pending declarations which may have abstract type. */
11571 complete_type_check_abstract (type);
11574 /* If DECL is of a type which needs a cleanup, build that cleanup
11578 cxx_maybe_build_cleanup (tree decl)
11580 tree type = TREE_TYPE (decl);
11582 if (type != error_mark_node && TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
11584 int flags = LOOKUP_NORMAL|LOOKUP_DESTRUCTOR;
11586 bool has_vbases = (TREE_CODE (type) == RECORD_TYPE
11587 && CLASSTYPE_VBASECLASSES (type));
11589 if (TREE_CODE (type) == ARRAY_TYPE)
11593 cxx_mark_addressable (decl);
11594 rval = build_unary_op (ADDR_EXPR, decl, 0);
11597 /* Optimize for space over speed here. */
11598 if (!has_vbases || flag_expensive_optimizations)
11599 flags |= LOOKUP_NONVIRTUAL;
11601 rval = build_delete (TREE_TYPE (rval), rval,
11602 sfk_complete_destructor, flags, 0);
11609 /* When a stmt has been parsed, this function is called. */
11616 /* DECL was originally constructed as a non-static member function,
11617 but turned out to be static. Update it accordingly. */
11620 revert_static_member_fn (tree decl)
11623 tree function = TREE_TYPE (decl);
11624 tree args = TYPE_ARG_TYPES (function);
11626 if (cp_type_quals (TREE_TYPE (TREE_VALUE (args)))
11627 != TYPE_UNQUALIFIED)
11628 error ("static member function %q#D declared with type qualifiers", decl);
11630 args = TREE_CHAIN (args);
11631 tmp = build_function_type (TREE_TYPE (function), args);
11632 tmp = build_qualified_type (tmp, cp_type_quals (function));
11633 tmp = build_exception_variant (tmp,
11634 TYPE_RAISES_EXCEPTIONS (function));
11635 TREE_TYPE (decl) = tmp;
11636 if (DECL_ARGUMENTS (decl))
11637 DECL_ARGUMENTS (decl) = TREE_CHAIN (DECL_ARGUMENTS (decl));
11638 DECL_STATIC_FUNCTION_P (decl) = 1;
11641 /* Initialize the variables used during compilation of a C++
11645 cxx_push_function_context (struct function * f)
11647 struct language_function *p = GGC_CNEW (struct language_function);
11650 /* Whenever we start a new function, we destroy temporaries in the
11652 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
11658 if (DECL_SAVED_FUNCTION_DATA (fn))
11660 /* If we already parsed this function, and we're just expanding it
11661 now, restore saved state. */
11662 *cp_function_chain = *DECL_SAVED_FUNCTION_DATA (fn);
11664 /* We don't need the saved data anymore. Unless this is an inline
11665 function; we need the named return value info for
11666 declare_return_variable. */
11667 if (! DECL_INLINE (fn))
11668 DECL_SAVED_FUNCTION_DATA (fn) = NULL;
11673 /* Free the language-specific parts of F, now that we've finished
11674 compiling the function. */
11677 cxx_pop_function_context (struct function * f)
11682 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
11683 one of the language-independent trees. */
11685 enum cp_tree_node_structure_enum
11686 cp_tree_node_structure (union lang_tree_node * t)
11688 switch (TREE_CODE (&t->generic))
11690 case DEFAULT_ARG: return TS_CP_DEFAULT_ARG;
11691 case IDENTIFIER_NODE: return TS_CP_IDENTIFIER;
11692 case OVERLOAD: return TS_CP_OVERLOAD;
11693 case TEMPLATE_PARM_INDEX: return TS_CP_TPI;
11694 case TINST_LEVEL: return TS_CP_TINST_LEVEL;
11695 case PTRMEM_CST: return TS_CP_PTRMEM;
11696 case BASELINK: return TS_CP_BASELINK;
11697 case STATIC_ASSERT: return TS_CP_STATIC_ASSERT;
11698 default: return TS_CP_GENERIC;
11702 /* Build the void_list_node (void_type_node having been created). */
11704 build_void_list_node (void)
11706 tree t = build_tree_list (NULL_TREE, void_type_node);
11711 cp_missing_noreturn_ok_p (tree decl)
11713 /* A missing noreturn is ok for the `main' function. */
11714 return DECL_MAIN_P (decl);
11717 /* Return the COMDAT group into which DECL should be placed. */
11720 cxx_comdat_group (tree decl)
11724 /* Virtual tables, construction virtual tables, and virtual table
11725 tables all go in a single COMDAT group, named after the primary
11727 if (TREE_CODE (decl) == VAR_DECL && DECL_VTABLE_OR_VTT_P (decl))
11728 name = DECL_ASSEMBLER_NAME (CLASSTYPE_VTABLES (DECL_CONTEXT (decl)));
11729 /* For all other DECLs, the COMDAT group is the mangled name of the
11730 declaration itself. */
11733 while (DECL_THUNK_P (decl))
11735 /* If TARGET_USE_LOCAL_THUNK_ALIAS_P, use_thunk puts the thunk
11736 into the same section as the target function. In that case
11737 we must return target's name. */
11738 tree target = THUNK_TARGET (decl);
11739 if (TARGET_USE_LOCAL_THUNK_ALIAS_P (target)
11740 && DECL_SECTION_NAME (target) != NULL
11741 && DECL_ONE_ONLY (target))
11746 name = DECL_ASSEMBLER_NAME (decl);
11749 return IDENTIFIER_POINTER (name);
11752 #include "gt-cp-decl.h"