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 /* Force minimum function alignment if using the least significant
3147 bit of function pointers to store the virtual bit. */
3148 if (TARGET_PTRMEMFUNC_VBIT_LOCATION == ptrmemfunc_vbit_in_pfn
3149 && force_align_functions_log < 1)
3150 force_align_functions_log = 1;
3153 current_lang_name = lang_name_c;
3155 /* Create the `std' namespace. */
3156 push_namespace (std_identifier);
3157 std_node = current_namespace;
3160 c_common_nodes_and_builtins ();
3162 java_byte_type_node = record_builtin_java_type ("__java_byte", 8);
3163 java_short_type_node = record_builtin_java_type ("__java_short", 16);
3164 java_int_type_node = record_builtin_java_type ("__java_int", 32);
3165 java_long_type_node = record_builtin_java_type ("__java_long", 64);
3166 java_float_type_node = record_builtin_java_type ("__java_float", -32);
3167 java_double_type_node = record_builtin_java_type ("__java_double", -64);
3168 java_char_type_node = record_builtin_java_type ("__java_char", -16);
3169 java_boolean_type_node = record_builtin_java_type ("__java_boolean", -1);
3171 integer_two_node = build_int_cst (NULL_TREE, 2);
3172 integer_three_node = build_int_cst (NULL_TREE, 3);
3174 record_builtin_type (RID_BOOL, "bool", boolean_type_node);
3175 truthvalue_type_node = boolean_type_node;
3176 truthvalue_false_node = boolean_false_node;
3177 truthvalue_true_node = boolean_true_node;
3179 empty_except_spec = build_tree_list (NULL_TREE, NULL_TREE);
3182 record_builtin_type (RID_MAX, NULL, string_type_node);
3185 delta_type_node = ptrdiff_type_node;
3186 vtable_index_type = ptrdiff_type_node;
3188 vtt_parm_type = build_pointer_type (const_ptr_type_node);
3189 void_ftype = build_function_type (void_type_node, void_list_node);
3190 void_ftype_ptr = build_function_type (void_type_node,
3191 tree_cons (NULL_TREE,
3195 = build_exception_variant (void_ftype_ptr, empty_except_spec);
3197 /* C++ extensions */
3199 unknown_type_node = make_node (UNKNOWN_TYPE);
3200 record_unknown_type (unknown_type_node, "unknown type");
3202 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
3203 TREE_TYPE (unknown_type_node) = unknown_type_node;
3205 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
3207 TYPE_POINTER_TO (unknown_type_node) = unknown_type_node;
3208 TYPE_REFERENCE_TO (unknown_type_node) = unknown_type_node;
3211 /* Make sure we get a unique function type, so we can give
3212 its pointer type a name. (This wins for gdb.) */
3213 tree vfunc_type = make_node (FUNCTION_TYPE);
3214 TREE_TYPE (vfunc_type) = integer_type_node;
3215 TYPE_ARG_TYPES (vfunc_type) = NULL_TREE;
3216 layout_type (vfunc_type);
3218 vtable_entry_type = build_pointer_type (vfunc_type);
3220 record_builtin_type (RID_MAX, VTBL_PTR_TYPE, vtable_entry_type);
3223 = build_cplus_array_type (vtable_entry_type, NULL_TREE);
3224 layout_type (vtbl_type_node);
3225 vtbl_type_node = build_qualified_type (vtbl_type_node, TYPE_QUAL_CONST);
3226 record_builtin_type (RID_MAX, NULL, vtbl_type_node);
3227 vtbl_ptr_type_node = build_pointer_type (vtable_entry_type);
3228 layout_type (vtbl_ptr_type_node);
3229 record_builtin_type (RID_MAX, NULL, vtbl_ptr_type_node);
3231 push_namespace (get_identifier ("__cxxabiv1"));
3232 abi_node = current_namespace;
3235 global_type_node = make_node (LANG_TYPE);
3236 record_unknown_type (global_type_node, "global type");
3239 current_lang_name = lang_name_cplusplus;
3243 tree bad_alloc_type_node;
3244 tree bad_alloc_decl;
3245 tree newtype, deltype;
3246 tree ptr_ftype_sizetype;
3248 push_namespace (std_identifier);
3249 bad_alloc_id = get_identifier ("bad_alloc");
3250 bad_alloc_type_node = make_aggr_type (RECORD_TYPE);
3251 TYPE_CONTEXT (bad_alloc_type_node) = current_namespace;
3253 = create_implicit_typedef (bad_alloc_id, bad_alloc_type_node);
3254 DECL_CONTEXT (bad_alloc_decl) = current_namespace;
3255 TYPE_STUB_DECL (bad_alloc_type_node) = bad_alloc_decl;
3259 = build_function_type (ptr_type_node,
3260 tree_cons (NULL_TREE,
3263 newtype = build_exception_variant
3264 (ptr_ftype_sizetype, add_exception_specifier
3265 (NULL_TREE, bad_alloc_type_node, -1));
3266 deltype = build_exception_variant (void_ftype_ptr, empty_except_spec);
3267 push_cp_library_fn (NEW_EXPR, newtype);
3268 push_cp_library_fn (VEC_NEW_EXPR, newtype);
3269 global_delete_fndecl = push_cp_library_fn (DELETE_EXPR, deltype);
3270 push_cp_library_fn (VEC_DELETE_EXPR, deltype);
3274 = build_library_fn_ptr ("__cxa_pure_virtual", void_ftype);
3276 /* Perform other language dependent initializations. */
3277 init_class_processing ();
3278 init_rtti_processing ();
3280 if (flag_exceptions)
3281 init_exception_processing ();
3283 if (! supports_one_only ())
3286 make_fname_decl = cp_make_fname_decl;
3287 start_fname_decls ();
3289 /* Show we use EH for cleanups. */
3290 if (flag_exceptions)
3291 using_eh_for_cleanups ();
3294 /* Generate an initializer for a function naming variable from
3295 NAME. NAME may be NULL, to indicate a dependent name. TYPE_P is
3296 filled in with the type of the init. */
3299 cp_fname_init (const char* name, tree *type_p)
3301 tree domain = NULL_TREE;
3303 tree init = NULL_TREE;
3308 length = strlen (name);
3309 domain = build_index_type (size_int (length));
3310 init = build_string (length + 1, name);
3313 type = build_qualified_type (char_type_node, TYPE_QUAL_CONST);
3314 type = build_cplus_array_type (type, domain);
3319 TREE_TYPE (init) = type;
3321 init = error_mark_node;
3326 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give the
3327 decl, NAME is the initialization string and TYPE_DEP indicates whether
3328 NAME depended on the type of the function. We make use of that to detect
3329 __PRETTY_FUNCTION__ inside a template fn. This is being done
3330 lazily at the point of first use, so we mustn't push the decl now. */
3333 cp_make_fname_decl (tree id, int type_dep)
3335 const char *const name = (type_dep && processing_template_decl
3336 ? NULL : fname_as_string (type_dep));
3338 tree init = cp_fname_init (name, &type);
3339 tree decl = build_decl (VAR_DECL, id, type);
3342 free ((char *) name);
3344 /* As we're using pushdecl_with_scope, we must set the context. */
3345 DECL_CONTEXT (decl) = current_function_decl;
3346 DECL_PRETTY_FUNCTION_P (decl) = type_dep;
3348 TREE_STATIC (decl) = 1;
3349 TREE_READONLY (decl) = 1;
3350 DECL_ARTIFICIAL (decl) = 1;
3352 TREE_USED (decl) = 1;
3354 if (current_function_decl)
3356 struct cp_binding_level *b = current_binding_level;
3357 while (b->level_chain->kind != sk_function_parms)
3359 pushdecl_with_scope (decl, b, /*is_friend=*/false);
3360 cp_finish_decl (decl, init, /*init_const_expr_p=*/false, NULL_TREE,
3361 LOOKUP_ONLYCONVERTING);
3364 pushdecl_top_level_and_finish (decl, init);
3370 builtin_function_1 (tree decl, tree context)
3372 tree id = DECL_NAME (decl);
3373 const char *name = IDENTIFIER_POINTER (id);
3375 retrofit_lang_decl (decl);
3377 /* All nesting of C++ functions is lexical; there is never a "static
3378 chain" in the sense of GNU C nested functions. */
3379 DECL_NO_STATIC_CHAIN (decl) = 1;
3381 DECL_ARTIFICIAL (decl) = 1;
3382 SET_OVERLOADED_OPERATOR_CODE (decl, ERROR_MARK);
3383 SET_DECL_LANGUAGE (decl, lang_c);
3384 /* Runtime library routines are, by definition, available in an
3385 external shared object. */
3386 DECL_VISIBILITY (decl) = VISIBILITY_DEFAULT;
3387 DECL_VISIBILITY_SPECIFIED (decl) = 1;
3389 DECL_CONTEXT (decl) = context;
3393 /* A function in the user's namespace should have an explicit
3394 declaration before it is used. Mark the built-in function as
3395 anticipated but not actually declared. */
3396 if (name[0] != '_' || name[1] != '_')
3397 DECL_ANTICIPATED (decl) = 1;
3403 cxx_builtin_function (tree decl)
3405 tree id = DECL_NAME (decl);
3406 const char *name = IDENTIFIER_POINTER (id);
3407 /* All builtins that don't begin with an '_' should additionally
3408 go in the 'std' namespace. */
3411 tree decl2 = copy_node(decl);
3412 push_namespace (std_identifier);
3413 builtin_function_1 (decl2, std_node);
3417 return builtin_function_1 (decl, NULL_TREE);
3420 /* Generate a FUNCTION_DECL with the typical flags for a runtime library
3421 function. Not called directly. */
3424 build_library_fn_1 (tree name, enum tree_code operator_code, tree type)
3426 tree fn = build_lang_decl (FUNCTION_DECL, name, type);
3427 DECL_EXTERNAL (fn) = 1;
3428 TREE_PUBLIC (fn) = 1;
3429 DECL_ARTIFICIAL (fn) = 1;
3430 SET_OVERLOADED_OPERATOR_CODE (fn, operator_code);
3431 SET_DECL_LANGUAGE (fn, lang_c);
3432 /* Runtime library routines are, by definition, available in an
3433 external shared object. */
3434 DECL_VISIBILITY (fn) = VISIBILITY_DEFAULT;
3435 DECL_VISIBILITY_SPECIFIED (fn) = 1;
3439 /* Returns the _DECL for a library function with C linkage.
3440 We assume that such functions never throw; if this is incorrect,
3441 callers should unset TREE_NOTHROW. */
3444 build_library_fn (tree name, tree type)
3446 tree fn = build_library_fn_1 (name, ERROR_MARK, type);
3447 TREE_NOTHROW (fn) = 1;
3451 /* Returns the _DECL for a library function with C++ linkage. */
3454 build_cp_library_fn (tree name, enum tree_code operator_code, tree type)
3456 tree fn = build_library_fn_1 (name, operator_code, type);
3457 TREE_NOTHROW (fn) = TYPE_NOTHROW_P (type);
3458 DECL_CONTEXT (fn) = FROB_CONTEXT (current_namespace);
3459 SET_DECL_LANGUAGE (fn, lang_cplusplus);
3463 /* Like build_library_fn, but takes a C string instead of an
3467 build_library_fn_ptr (const char* name, tree type)
3469 return build_library_fn (get_identifier (name), type);
3472 /* Like build_cp_library_fn, but takes a C string instead of an
3476 build_cp_library_fn_ptr (const char* name, tree type)
3478 return build_cp_library_fn (get_identifier (name), ERROR_MARK, type);
3481 /* Like build_library_fn, but also pushes the function so that we will
3482 be able to find it via IDENTIFIER_GLOBAL_VALUE. */
3485 push_library_fn (tree name, tree type)
3487 tree fn = build_library_fn (name, type);
3488 pushdecl_top_level (fn);
3492 /* Like build_cp_library_fn, but also pushes the function so that it
3493 will be found by normal lookup. */
3496 push_cp_library_fn (enum tree_code operator_code, tree type)
3498 tree fn = build_cp_library_fn (ansi_opname (operator_code),
3505 /* Like push_library_fn, but takes a TREE_LIST of parm types rather than
3509 push_void_library_fn (tree name, tree parmtypes)
3511 tree type = build_function_type (void_type_node, parmtypes);
3512 return push_library_fn (name, type);
3515 /* Like push_library_fn, but also note that this function throws
3516 and does not return. Used for __throw_foo and the like. */
3519 push_throw_library_fn (tree name, tree type)
3521 tree fn = push_library_fn (name, type);
3522 TREE_THIS_VOLATILE (fn) = 1;
3523 TREE_NOTHROW (fn) = 0;
3527 /* When we call finish_struct for an anonymous union, we create
3528 default copy constructors and such. But, an anonymous union
3529 shouldn't have such things; this function undoes the damage to the
3530 anonymous union type T.
3532 (The reason that we create the synthesized methods is that we don't
3533 distinguish `union { int i; }' from `typedef union { int i; } U'.
3534 The first is an anonymous union; the second is just an ordinary
3538 fixup_anonymous_aggr (tree t)
3542 /* Wipe out memory of synthesized methods. */
3543 TYPE_HAS_CONSTRUCTOR (t) = 0;
3544 TYPE_HAS_DEFAULT_CONSTRUCTOR (t) = 0;
3545 TYPE_HAS_INIT_REF (t) = 0;
3546 TYPE_HAS_CONST_INIT_REF (t) = 0;
3547 TYPE_HAS_ASSIGN_REF (t) = 0;
3548 TYPE_HAS_CONST_ASSIGN_REF (t) = 0;
3550 /* Splice the implicitly generated functions out of the TYPE_METHODS
3552 q = &TYPE_METHODS (t);
3555 if (DECL_ARTIFICIAL (*q))
3556 *q = TREE_CHAIN (*q);
3558 q = &TREE_CHAIN (*q);
3561 /* ISO C++ 9.5.3. Anonymous unions may not have function members. */
3562 if (TYPE_METHODS (t))
3563 error ("%Jan anonymous union cannot have function members",
3564 TYPE_MAIN_DECL (t));
3566 /* Anonymous aggregates cannot have fields with ctors, dtors or complex
3567 assignment operators (because they cannot have these methods themselves).
3568 For anonymous unions this is already checked because they are not allowed
3569 in any union, otherwise we have to check it. */
3570 if (TREE_CODE (t) != UNION_TYPE)
3574 for (field = TYPE_FIELDS (t); field; field = TREE_CHAIN (field))
3575 if (TREE_CODE (field) == FIELD_DECL)
3577 type = TREE_TYPE (field);
3578 if (CLASS_TYPE_P (type))
3580 if (TYPE_NEEDS_CONSTRUCTING (type))
3581 error ("member %q+#D with constructor not allowed "
3582 "in anonymous aggregate", field);
3583 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
3584 error ("member %q+#D with destructor not allowed "
3585 "in anonymous aggregate", field);
3586 if (TYPE_HAS_COMPLEX_ASSIGN_REF (type))
3587 error ("member %q+#D with copy assignment operator "
3588 "not allowed in anonymous aggregate", field);
3594 /* Make sure that a declaration with no declarator is well-formed, i.e.
3595 just declares a tagged type or anonymous union.
3597 Returns the type declared; or NULL_TREE if none. */
3600 check_tag_decl (cp_decl_specifier_seq *declspecs)
3602 int saw_friend = declspecs->specs[(int)ds_friend] != 0;
3603 int saw_typedef = declspecs->specs[(int)ds_typedef] != 0;
3604 /* If a class, struct, or enum type is declared by the DECLSPECS
3605 (i.e, if a class-specifier, enum-specifier, or non-typename
3606 elaborated-type-specifier appears in the DECLSPECS),
3607 DECLARED_TYPE is set to the corresponding type. */
3608 tree declared_type = NULL_TREE;
3609 bool error_p = false;
3611 if (declspecs->multiple_types_p)
3612 error ("multiple types in one declaration");
3613 else if (declspecs->redefined_builtin_type)
3615 if (!in_system_header)
3616 pedwarn ("redeclaration of C++ built-in type %qT",
3617 declspecs->redefined_builtin_type);
3622 && TYPE_P (declspecs->type)
3623 && ((TREE_CODE (declspecs->type) != TYPENAME_TYPE
3624 && IS_AGGR_TYPE (declspecs->type))
3625 || TREE_CODE (declspecs->type) == ENUMERAL_TYPE))
3626 declared_type = declspecs->type;
3627 else if (declspecs->type == error_mark_node)
3629 if (declared_type == NULL_TREE && ! saw_friend && !error_p)
3630 pedwarn ("declaration does not declare anything");
3631 /* Check for an anonymous union. */
3632 else if (declared_type && IS_AGGR_TYPE_CODE (TREE_CODE (declared_type))
3633 && TYPE_ANONYMOUS_P (declared_type))
3635 /* 7/3 In a simple-declaration, the optional init-declarator-list
3636 can be omitted only when declaring a class (clause 9) or
3637 enumeration (7.2), that is, when the decl-specifier-seq contains
3638 either a class-specifier, an elaborated-type-specifier with
3639 a class-key (9.1), or an enum-specifier. In these cases and
3640 whenever a class-specifier or enum-specifier is present in the
3641 decl-specifier-seq, the identifiers in these specifiers are among
3642 the names being declared by the declaration (as class-name,
3643 enum-names, or enumerators, depending on the syntax). In such
3644 cases, and except for the declaration of an unnamed bit-field (9.6),
3645 the decl-specifier-seq shall introduce one or more names into the
3646 program, or shall redeclare a name introduced by a previous
3647 declaration. [Example:
3648 enum { }; // ill-formed
3649 typedef class { }; // ill-formed
3653 error ("missing type-name in typedef-declaration");
3656 /* Anonymous unions are objects, so they can have specifiers. */;
3657 SET_ANON_AGGR_TYPE_P (declared_type);
3659 if (TREE_CODE (declared_type) != UNION_TYPE && pedantic
3660 && !in_system_header)
3661 pedwarn ("ISO C++ prohibits anonymous structs");
3666 if (declspecs->specs[(int)ds_inline]
3667 || declspecs->specs[(int)ds_virtual])
3668 error ("%qs can only be specified for functions",
3669 declspecs->specs[(int)ds_inline]
3670 ? "inline" : "virtual");
3672 && (!current_class_type
3673 || current_scope () != current_class_type))
3674 error ("%<friend%> can only be specified inside a class");
3675 else if (declspecs->specs[(int)ds_explicit])
3676 error ("%<explicit%> can only be specified for constructors");
3677 else if (declspecs->storage_class)
3678 error ("a storage class can only be specified for objects "
3680 else if (declspecs->specs[(int)ds_const]
3681 || declspecs->specs[(int)ds_volatile]
3682 || declspecs->specs[(int)ds_restrict]
3683 || declspecs->specs[(int)ds_thread])
3684 error ("qualifiers can only be specified for objects "
3686 else if (saw_typedef)
3687 warning (0, "%<typedef%> was ignored in this declaration");
3690 return declared_type;
3693 /* Called when a declaration is seen that contains no names to declare.
3694 If its type is a reference to a structure, union or enum inherited
3695 from a containing scope, shadow that tag name for the current scope
3696 with a forward reference.
3697 If its type defines a new named structure or union
3698 or defines an enum, it is valid but we need not do anything here.
3699 Otherwise, it is an error.
3701 C++: may have to grok the declspecs to learn about static,
3702 complain for anonymous unions.
3704 Returns the TYPE declared -- or NULL_TREE if none. */
3707 shadow_tag (cp_decl_specifier_seq *declspecs)
3709 tree t = check_tag_decl (declspecs);
3714 if (declspecs->attributes)
3716 warning (0, "attribute ignored in declaration of %q+#T", t);
3717 warning (0, "attribute for %q+#T must follow the %qs keyword",
3718 t, class_key_or_enum_as_string (t));
3722 if (maybe_process_partial_specialization (t) == error_mark_node)
3725 /* This is where the variables in an anonymous union are
3726 declared. An anonymous union declaration looks like:
3728 because there is no declarator after the union, the parser
3729 sends that declaration here. */
3730 if (ANON_AGGR_TYPE_P (t))
3732 fixup_anonymous_aggr (t);
3734 if (TYPE_FIELDS (t))
3736 tree decl = grokdeclarator (/*declarator=*/NULL,
3737 declspecs, NORMAL, 0, NULL);
3738 finish_anon_union (decl);
3745 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
3748 groktypename (cp_decl_specifier_seq *type_specifiers,
3749 const cp_declarator *declarator)
3753 attrs = type_specifiers->attributes;
3754 type_specifiers->attributes = NULL_TREE;
3755 type = grokdeclarator (declarator, type_specifiers, TYPENAME, 0, &attrs);
3757 cplus_decl_attributes (&type, attrs, 0);
3761 /* Decode a declarator in an ordinary declaration or data definition.
3762 This is called as soon as the type information and variable name
3763 have been parsed, before parsing the initializer if any.
3764 Here we create the ..._DECL node, fill in its type,
3765 and put it on the list of decls for the current context.
3766 The ..._DECL node is returned as the value.
3768 Exception: for arrays where the length is not specified,
3769 the type is left null, to be filled in by `cp_finish_decl'.
3771 Function definitions do not come here; they go to start_function
3772 instead. However, external and forward declarations of functions
3773 do go through here. Structure field declarations are done by
3774 grokfield and not through here. */
3777 start_decl (const cp_declarator *declarator,
3778 cp_decl_specifier_seq *declspecs,
3781 tree prefix_attributes,
3782 tree *pushed_scope_p)
3788 *pushed_scope_p = NULL_TREE;
3790 /* An object declared as __attribute__((deprecated)) suppresses
3791 warnings of uses of other deprecated items. */
3792 if (lookup_attribute ("deprecated", attributes))
3793 deprecated_state = DEPRECATED_SUPPRESS;
3795 attributes = chainon (attributes, prefix_attributes);
3797 decl = grokdeclarator (declarator, declspecs, NORMAL, initialized,
3800 deprecated_state = DEPRECATED_NORMAL;
3802 if (decl == NULL_TREE || TREE_CODE (decl) == VOID_TYPE
3803 || decl == error_mark_node)
3804 return error_mark_node;
3806 type = TREE_TYPE (decl);
3808 context = DECL_CONTEXT (decl);
3812 *pushed_scope_p = push_scope (context);
3814 /* We are only interested in class contexts, later. */
3815 if (TREE_CODE (context) == NAMESPACE_DECL)
3816 context = NULL_TREE;
3820 /* Is it valid for this decl to have an initializer at all?
3821 If not, set INITIALIZED to zero, which will indirectly
3822 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
3823 switch (TREE_CODE (decl))
3826 error ("typedef %qD is initialized (use __typeof__ instead)", decl);
3827 return error_mark_node;
3830 error ("function %q#D is initialized like a variable", decl);
3831 return error_mark_node;
3839 if (! toplevel_bindings_p ()
3840 && DECL_EXTERNAL (decl))
3841 warning (0, "declaration of %q#D has %<extern%> and is initialized",
3843 DECL_EXTERNAL (decl) = 0;
3844 if (toplevel_bindings_p ())
3845 TREE_STATIC (decl) = 1;
3848 /* Set attributes here so if duplicate decl, will have proper attributes. */
3849 cplus_decl_attributes (&decl, attributes, 0);
3851 /* Dllimported symbols cannot be defined. Static data members (which
3852 can be initialized in-class and dllimported) go through grokfield,
3853 not here, so we don't need to exclude those decls when checking for
3855 if (initialized && DECL_DLLIMPORT_P (decl))
3857 error ("definition of %q#D is marked %<dllimport%>", decl);
3858 DECL_DLLIMPORT_P (decl) = 0;
3861 /* If #pragma weak was used, mark the decl weak now. */
3862 maybe_apply_pragma_weak (decl);
3864 if (TREE_CODE (decl) == FUNCTION_DECL
3865 && DECL_DECLARED_INLINE_P (decl)
3866 && DECL_UNINLINABLE (decl)
3867 && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl)))
3868 warning (0, "inline function %q+D given attribute noinline", decl);
3870 if (context && COMPLETE_TYPE_P (complete_type (context)))
3872 if (TREE_CODE (decl) == VAR_DECL)
3874 tree field = lookup_field (context, DECL_NAME (decl), 0, false);
3875 if (field == NULL_TREE || TREE_CODE (field) != VAR_DECL)
3876 error ("%q#D is not a static member of %q#T", decl, context);
3879 if (DECL_CONTEXT (field) != context)
3881 if (!same_type_p (DECL_CONTEXT (field), context))
3882 pedwarn ("ISO C++ does not permit %<%T::%D%> "
3883 "to be defined as %<%T::%D%>",
3884 DECL_CONTEXT (field), DECL_NAME (decl),
3885 context, DECL_NAME (decl));
3886 DECL_CONTEXT (decl) = DECL_CONTEXT (field);
3888 if (processing_specialization
3889 && template_class_depth (context) == 0
3890 && CLASSTYPE_TEMPLATE_SPECIALIZATION (context))
3891 error ("template header not allowed in member definition "
3892 "of explicitly specialized class");
3893 /* Static data member are tricky; an in-class initialization
3894 still doesn't provide a definition, so the in-class
3895 declaration will have DECL_EXTERNAL set, but will have an
3896 initialization. Thus, duplicate_decls won't warn
3897 about this situation, and so we check here. */
3898 if (initialized && DECL_INITIALIZED_IN_CLASS_P (field))
3899 error ("duplicate initialization of %qD", decl);
3900 if (duplicate_decls (decl, field, /*newdecl_is_friend=*/false))
3906 tree field = check_classfn (context, decl,
3907 (processing_template_decl
3908 > template_class_depth (context))
3909 ? current_template_parms
3911 if (field && duplicate_decls (decl, field,
3912 /*newdecl_is_friend=*/false))
3916 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
3917 DECL_IN_AGGR_P (decl) = 0;
3918 /* Do not mark DECL as an explicit specialization if it was not
3919 already marked as an instantiation; a declaration should
3920 never be marked as a specialization unless we know what
3921 template is being specialized. */
3922 if (DECL_LANG_SPECIFIC (decl) && DECL_USE_TEMPLATE (decl))
3924 SET_DECL_TEMPLATE_SPECIALIZATION (decl);
3926 /* [temp.expl.spec] An explicit specialization of a static data
3927 member of a template is a definition if the declaration
3928 includes an initializer; otherwise, it is a declaration.
3930 We check for processing_specialization so this only applies
3931 to the new specialization syntax. */
3932 if (!initialized && processing_specialization)
3933 DECL_EXTERNAL (decl) = 1;
3936 if (DECL_EXTERNAL (decl) && ! DECL_TEMPLATE_SPECIALIZATION (decl))
3937 pedwarn ("declaration of %q#D outside of class is not definition",
3941 /* Enter this declaration into the symbol table. */
3942 tem = maybe_push_decl (decl);
3944 if (processing_template_decl)
3945 tem = push_template_decl (tem);
3946 if (tem == error_mark_node)
3947 return error_mark_node;
3949 /* Tell the back end to use or not use .common as appropriate. If we say
3950 -fconserve-space, we want this to save .data space, at the expense of
3951 wrong semantics. If we say -fno-conserve-space, we want this to
3952 produce errors about redefs; to do this we force variables into the
3954 if (flag_conserve_space
3955 && TREE_CODE (tem) == VAR_DECL
3956 && TREE_PUBLIC (tem)
3957 && !DECL_THREAD_LOCAL_P (tem)
3958 && !have_global_bss_p ())
3959 DECL_COMMON (tem) = 1;
3961 if (!processing_template_decl && TREE_CODE (tem) == VAR_DECL)
3962 start_decl_1 (tem, initialized);
3968 start_decl_1 (tree decl, bool initialized)
3972 gcc_assert (!processing_template_decl);
3974 if (error_operand_p (decl))
3977 gcc_assert (TREE_CODE (decl) == VAR_DECL);
3978 type = TREE_TYPE (decl);
3981 /* Is it valid for this decl to have an initializer at all?
3982 If not, set INITIALIZED to zero, which will indirectly
3983 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
3985 /* Don't allow initializations for incomplete types except for
3986 arrays which might be completed by the initialization. */
3987 if (COMPLETE_TYPE_P (complete_type (type)))
3988 ; /* A complete type is ok. */
3989 else if (TREE_CODE (type) != ARRAY_TYPE)
3991 error ("variable %q#D has initializer but incomplete type", decl);
3993 type = TREE_TYPE (decl) = error_mark_node;
3995 else if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (type))))
3997 if (DECL_LANG_SPECIFIC (decl) && DECL_TEMPLATE_INFO (decl))
3998 error ("elements of array %q#D have incomplete type", decl);
3999 /* else we already gave an error in start_decl. */
4003 else if (IS_AGGR_TYPE (type)
4004 && ! DECL_EXTERNAL (decl))
4006 if (!COMPLETE_TYPE_P (complete_type (type)))
4008 error ("aggregate %q#D has incomplete type and cannot be defined",
4010 /* Change the type so that assemble_variable will give
4011 DECL an rtl we can live with: (mem (const_int 0)). */
4012 type = TREE_TYPE (decl) = error_mark_node;
4016 /* If any base type in the hierarchy of TYPE needs a constructor,
4017 then we set initialized to 1. This way any nodes which are
4018 created for the purposes of initializing this aggregate
4019 will live as long as it does. This is necessary for global
4020 aggregates which do not have their initializers processed until
4021 the end of the file. */
4022 initialized = TYPE_NEEDS_CONSTRUCTING (type);
4026 /* Create a new scope to hold this declaration if necessary.
4027 Whether or not a new scope is necessary cannot be determined
4028 until after the type has been completed; if the type is a
4029 specialization of a class template it is not until after
4030 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
4031 will be set correctly. */
4032 maybe_push_cleanup_level (type);
4035 /* Handle initialization of references. DECL, TYPE, and INIT have the
4036 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
4037 but will be set to a new CLEANUP_STMT if a temporary is created
4038 that must be destroyed subsequently.
4040 Returns an initializer expression to use to initialize DECL, or
4041 NULL if the initialization can be performed statically.
4043 Quotes on semantics can be found in ARM 8.4.3. */
4046 grok_reference_init (tree decl, tree type, tree init, tree *cleanup)
4050 if (init == NULL_TREE)
4052 if ((DECL_LANG_SPECIFIC (decl) == 0
4053 || DECL_IN_AGGR_P (decl) == 0)
4054 && ! DECL_THIS_EXTERN (decl))
4055 error ("%qD declared as reference but not initialized", decl);
4059 if (TREE_CODE (init) == CONSTRUCTOR)
4061 error ("ISO C++ forbids use of initializer list to "
4062 "initialize reference %qD", decl);
4066 if (TREE_CODE (init) == TREE_LIST)
4067 init = build_x_compound_expr_from_list (init, "initializer");
4069 if (TREE_CODE (TREE_TYPE (type)) != ARRAY_TYPE
4070 && TREE_CODE (TREE_TYPE (init)) == ARRAY_TYPE)
4071 /* Note: default conversion is only called in very special cases. */
4072 init = decay_conversion (init);
4074 /* Convert INIT to the reference type TYPE. This may involve the
4075 creation of a temporary, whose lifetime must be the same as that
4076 of the reference. If so, a DECL_EXPR for the temporary will be
4077 added just after the DECL_EXPR for DECL. That's why we don't set
4078 DECL_INITIAL for local references (instead assigning to them
4079 explicitly); we need to allow the temporary to be initialized
4081 tmp = initialize_reference (type, init, decl, cleanup);
4083 if (tmp == error_mark_node)
4085 else if (tmp == NULL_TREE)
4087 error ("cannot initialize %qT from %qT", type, TREE_TYPE (init));
4091 if (TREE_STATIC (decl) && !TREE_CONSTANT (tmp))
4094 DECL_INITIAL (decl) = tmp;
4099 /* Designated initializers in arrays are not supported in GNU C++.
4100 The parser cannot detect this error since it does not know whether
4101 a given brace-enclosed initializer is for a class type or for an
4102 array. This function checks that CE does not use a designated
4103 initializer. If it does, an error is issued. Returns true if CE
4104 is valid, i.e., does not have a designated initializer. */
4107 check_array_designated_initializer (const constructor_elt *ce)
4109 /* Designated initializers for array elements are not supported. */
4112 /* The parser only allows identifiers as designated
4114 gcc_assert (TREE_CODE (ce->index) == IDENTIFIER_NODE);
4115 error ("name %qD used in a GNU-style designated "
4116 "initializer for an array", ce->index);
4123 /* When parsing `int a[] = {1, 2};' we don't know the size of the
4124 array until we finish parsing the initializer. If that's the
4125 situation we're in, update DECL accordingly. */
4128 maybe_deduce_size_from_array_init (tree decl, tree init)
4130 tree type = TREE_TYPE (decl);
4132 if (TREE_CODE (type) == ARRAY_TYPE
4133 && TYPE_DOMAIN (type) == NULL_TREE
4134 && TREE_CODE (decl) != TYPE_DECL)
4136 /* do_default is really a C-ism to deal with tentative definitions.
4137 But let's leave it here to ease the eventual merge. */
4138 int do_default = !DECL_EXTERNAL (decl);
4139 tree initializer = init ? init : DECL_INITIAL (decl);
4142 /* Check that there are no designated initializers in INIT, as
4143 those are not supported in GNU C++, and as the middle-end
4144 will crash if presented with a non-numeric designated
4146 if (initializer && TREE_CODE (initializer) == CONSTRUCTOR)
4148 VEC(constructor_elt,gc) *v = CONSTRUCTOR_ELTS (initializer);
4149 constructor_elt *ce;
4152 VEC_iterate (constructor_elt, v, i, ce);
4154 if (!check_array_designated_initializer (ce))
4160 failure = cp_complete_array_type (&TREE_TYPE (decl), initializer,
4164 error ("initializer fails to determine size of %qD", decl);
4165 TREE_TYPE (decl) = error_mark_node;
4167 else if (failure == 2)
4171 error ("array size missing in %qD", decl);
4172 TREE_TYPE (decl) = error_mark_node;
4174 /* If a `static' var's size isn't known, make it extern as
4175 well as static, so it does not get allocated. If it's not
4176 `static', then don't mark it extern; finish_incomplete_decl
4177 will give it a default size and it will get allocated. */
4178 else if (!pedantic && TREE_STATIC (decl) && !TREE_PUBLIC (decl))
4179 DECL_EXTERNAL (decl) = 1;
4181 else if (failure == 3)
4183 error ("zero-size array %qD", decl);
4184 TREE_TYPE (decl) = error_mark_node;
4188 cp_apply_type_quals_to_decl (cp_type_quals (TREE_TYPE (decl)), decl);
4190 layout_decl (decl, 0);
4194 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
4195 any appropriate error messages regarding the layout. */
4198 layout_var_decl (tree decl)
4202 type = TREE_TYPE (decl);
4203 if (type == error_mark_node)
4206 /* If we haven't already layed out this declaration, do so now.
4207 Note that we must not call complete type for an external object
4208 because it's type might involve templates that we are not
4209 supposed to instantiate yet. (And it's perfectly valid to say
4210 `extern X x' for some incomplete type `X'.) */
4211 if (!DECL_EXTERNAL (decl))
4212 complete_type (type);
4213 if (!DECL_SIZE (decl)
4214 && TREE_TYPE (decl) != error_mark_node
4215 && (COMPLETE_TYPE_P (type)
4216 || (TREE_CODE (type) == ARRAY_TYPE
4217 && !TYPE_DOMAIN (type)
4218 && COMPLETE_TYPE_P (TREE_TYPE (type)))))
4219 layout_decl (decl, 0);
4221 if (!DECL_EXTERNAL (decl) && DECL_SIZE (decl) == NULL_TREE)
4223 /* An automatic variable with an incomplete type: that is an error.
4224 Don't talk about array types here, since we took care of that
4225 message in grokdeclarator. */
4226 error ("storage size of %qD isn't known", decl);
4227 TREE_TYPE (decl) = error_mark_node;
4230 /* Keep this code around in case we later want to control debug info
4231 based on whether a type is "used". (jason 1999-11-11) */
4233 else if (!DECL_EXTERNAL (decl) && IS_AGGR_TYPE (ttype))
4234 /* Let debugger know it should output info for this type. */
4235 note_debug_info_needed (ttype);
4237 if (TREE_STATIC (decl) && DECL_CLASS_SCOPE_P (decl))
4238 note_debug_info_needed (DECL_CONTEXT (decl));
4241 if ((DECL_EXTERNAL (decl) || TREE_STATIC (decl))
4242 && DECL_SIZE (decl) != NULL_TREE
4243 && ! TREE_CONSTANT (DECL_SIZE (decl)))
4245 if (TREE_CODE (DECL_SIZE (decl)) == INTEGER_CST)
4246 constant_expression_warning (DECL_SIZE (decl));
4248 error ("storage size of %qD isn't constant", decl);
4252 /* If a local static variable is declared in an inline function, or if
4253 we have a weak definition, we must endeavor to create only one
4254 instance of the variable at link-time. */
4257 maybe_commonize_var (tree decl)
4259 /* Static data in a function with comdat linkage also has comdat
4261 if (TREE_STATIC (decl)
4262 /* Don't mess with __FUNCTION__. */
4263 && ! DECL_ARTIFICIAL (decl)
4264 && DECL_FUNCTION_SCOPE_P (decl)
4265 /* Unfortunately, import_export_decl has not always been called
4266 before the function is processed, so we cannot simply check
4268 && (DECL_COMDAT (DECL_CONTEXT (decl))
4269 || ((DECL_DECLARED_INLINE_P (DECL_CONTEXT (decl))
4270 || DECL_TEMPLATE_INSTANTIATION (DECL_CONTEXT (decl)))
4271 && TREE_PUBLIC (DECL_CONTEXT (decl)))))
4275 /* With weak symbols, we simply make the variable COMDAT;
4276 that will cause copies in multiple translations units to
4278 comdat_linkage (decl);
4282 if (DECL_INITIAL (decl) == NULL_TREE
4283 || DECL_INITIAL (decl) == error_mark_node)
4285 /* Without weak symbols, we can use COMMON to merge
4286 uninitialized variables. */
4287 TREE_PUBLIC (decl) = 1;
4288 DECL_COMMON (decl) = 1;
4292 /* While for initialized variables, we must use internal
4293 linkage -- which means that multiple copies will not
4295 TREE_PUBLIC (decl) = 0;
4296 DECL_COMMON (decl) = 0;
4297 warning (0, "sorry: semantics of inline function static "
4298 "data %q+#D are wrong (you'll wind up "
4299 "with multiple copies)", decl);
4300 warning (0, "%J you can work around this by removing "
4306 else if (DECL_LANG_SPECIFIC (decl) && DECL_COMDAT (decl))
4307 /* Set it up again; we might have set DECL_INITIAL since the last
4309 comdat_linkage (decl);
4312 /* Issue an error message if DECL is an uninitialized const variable. */
4315 check_for_uninitialized_const_var (tree decl)
4317 tree type = TREE_TYPE (decl);
4319 /* ``Unless explicitly declared extern, a const object does not have
4320 external linkage and must be initialized. ($8.4; $12.1)'' ARM
4322 if (TREE_CODE (decl) == VAR_DECL
4323 && TREE_CODE (type) != REFERENCE_TYPE
4324 && CP_TYPE_CONST_P (type)
4325 && !TYPE_NEEDS_CONSTRUCTING (type)
4326 && !DECL_INITIAL (decl))
4327 error ("uninitialized const %qD", decl);
4331 /* Structure holding the current initializer being processed by reshape_init.
4332 CUR is a pointer to the current element being processed, END is a pointer
4333 after the last element present in the initializer. */
4334 typedef struct reshape_iterator_t
4336 constructor_elt *cur;
4337 constructor_elt *end;
4340 static tree reshape_init_r (tree, reshape_iter *, bool);
4342 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
4343 returned is the next FIELD_DECL (possibly FIELD itself) that can be
4344 initialized. If there are no more such fields, the return value
4348 next_initializable_field (tree field)
4351 && (TREE_CODE (field) != FIELD_DECL
4352 || (DECL_C_BIT_FIELD (field) && !DECL_NAME (field))
4353 || DECL_ARTIFICIAL (field)))
4354 field = TREE_CHAIN (field);
4359 /* Subroutine of reshape_init_array and reshape_init_vector, which does
4360 the actual work. ELT_TYPE is the element type of the array. MAX_INDEX is an
4361 INTEGER_CST representing the size of the array minus one (the maximum index),
4362 or NULL_TREE if the array was declared without specifying the size. D is
4363 the iterator within the constructor. */
4366 reshape_init_array_1 (tree elt_type, tree max_index, reshape_iter *d)
4369 bool sized_array_p = (max_index != NULL_TREE);
4370 unsigned HOST_WIDE_INT max_index_cst = 0;
4371 unsigned HOST_WIDE_INT index;
4373 /* The initializer for an array is always a CONSTRUCTOR. */
4374 new_init = build_constructor (NULL_TREE, NULL);
4378 /* Minus 1 is used for zero sized arrays. */
4379 if (integer_all_onesp (max_index))
4382 if (host_integerp (max_index, 1))
4383 max_index_cst = tree_low_cst (max_index, 1);
4384 /* sizetype is sign extended, not zero extended. */
4386 max_index_cst = tree_low_cst (fold_convert (size_type_node, max_index),
4390 /* Loop until there are no more initializers. */
4392 d->cur != d->end && (!sized_array_p || index <= max_index_cst);
4397 check_array_designated_initializer (d->cur);
4398 elt_init = reshape_init_r (elt_type, d, /*first_initializer_p=*/false);
4399 if (elt_init == error_mark_node)
4400 return error_mark_node;
4401 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init), NULL_TREE, elt_init);
4407 /* Subroutine of reshape_init_r, processes the initializers for arrays.
4408 Parameters are the same of reshape_init_r. */
4411 reshape_init_array (tree type, reshape_iter *d)
4413 tree max_index = NULL_TREE;
4415 gcc_assert (TREE_CODE (type) == ARRAY_TYPE);
4417 if (TYPE_DOMAIN (type))
4418 max_index = array_type_nelts (type);
4420 return reshape_init_array_1 (TREE_TYPE (type), max_index, d);
4423 /* Subroutine of reshape_init_r, processes the initializers for vectors.
4424 Parameters are the same of reshape_init_r. */
4427 reshape_init_vector (tree type, reshape_iter *d)
4429 tree max_index = NULL_TREE;
4432 gcc_assert (TREE_CODE (type) == VECTOR_TYPE);
4434 if (COMPOUND_LITERAL_P (d->cur->value))
4436 tree value = d->cur->value;
4437 if (!same_type_p (TREE_TYPE (value), type))
4439 error ("invalid type %qT as initializer for a vector of type %qT",
4440 TREE_TYPE (d->cur->value), type);
4441 value = error_mark_node;
4447 /* For a vector, the representation type is a struct
4448 containing a single member which is an array of the
4449 appropriate size. */
4450 rtype = TYPE_DEBUG_REPRESENTATION_TYPE (type);
4451 if (rtype && TYPE_DOMAIN (TREE_TYPE (TYPE_FIELDS (rtype))))
4452 max_index = array_type_nelts (TREE_TYPE (TYPE_FIELDS (rtype)));
4454 return reshape_init_array_1 (TREE_TYPE (type), max_index, d);
4457 /* Subroutine of reshape_init_r, processes the initializers for classes
4458 or union. Parameters are the same of reshape_init_r. */
4461 reshape_init_class (tree type, reshape_iter *d, bool first_initializer_p)
4466 gcc_assert (CLASS_TYPE_P (type));
4468 /* The initializer for a class is always a CONSTRUCTOR. */
4469 new_init = build_constructor (NULL_TREE, NULL);
4470 field = next_initializable_field (TYPE_FIELDS (type));
4476 An initializer for an aggregate member that is an
4477 empty class shall have the form of an empty
4478 initializer-list {}. */
4479 if (!first_initializer_p)
4481 error ("initializer for %qT must be brace-enclosed", type);
4482 return error_mark_node;
4487 /* Loop through the initializable fields, gathering initializers. */
4488 while (d->cur != d->end)
4492 /* Handle designated initializers, as an extension. */
4495 field = lookup_field_1 (type, d->cur->index, /*want_type=*/false);
4497 if (!field || TREE_CODE (field) != FIELD_DECL)
4499 error ("%qT has no non-static data member named %qD", type,
4501 return error_mark_node;
4505 /* If we processed all the member of the class, we are done. */
4509 field_init = reshape_init_r (TREE_TYPE (field), d,
4510 /*first_initializer_p=*/false);
4511 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init), field, field_init);
4515 When a union is initialized with a brace-enclosed
4516 initializer, the braces shall only contain an
4517 initializer for the first member of the union. */
4518 if (TREE_CODE (type) == UNION_TYPE)
4521 field = next_initializable_field (TREE_CHAIN (field));
4527 /* Subroutine of reshape_init, which processes a single initializer (part of
4528 a CONSTRUCTOR). TYPE is the type of the variable being initialized, D is the
4529 iterator within the CONSTRUCTOR which points to the initializer to process.
4530 FIRST_INITIALIZER_P is true if this is the first initializer of the
4531 CONSTRUCTOR node. */
4534 reshape_init_r (tree type, reshape_iter *d, bool first_initializer_p)
4536 tree init = d->cur->value;
4538 /* A non-aggregate type is always initialized with a single
4540 if (!CP_AGGREGATE_TYPE_P (type))
4542 /* It is invalid to initialize a non-aggregate type with a
4543 brace-enclosed initializer.
4544 We need to check for BRACE_ENCLOSED_INITIALIZER_P here because
4545 of g++.old-deja/g++.mike/p7626.C: a pointer-to-member constant is
4546 a CONSTRUCTOR (with a record type). */
4547 if (TREE_CODE (init) == CONSTRUCTOR
4548 && BRACE_ENCLOSED_INITIALIZER_P (init)) /* p7626.C */
4550 error ("braces around scalar initializer for type %qT", type);
4551 init = error_mark_node;
4560 All implicit type conversions (clause _conv_) are considered when
4561 initializing the aggregate member with an initializer from an
4562 initializer-list. If the initializer can initialize a member,
4563 the member is initialized. Otherwise, if the member is itself a
4564 non-empty subaggregate, brace elision is assumed and the
4565 initializer is considered for the initialization of the first
4566 member of the subaggregate. */
4567 if (TREE_CODE (init) != CONSTRUCTOR
4568 && can_convert_arg (type, TREE_TYPE (init), init, LOOKUP_NORMAL))
4574 /* [dcl.init.string]
4576 A char array (whether plain char, signed char, or unsigned char)
4577 can be initialized by a string-literal (optionally enclosed in
4578 braces); a wchar_t array can be initialized by a wide
4579 string-literal (optionally enclosed in braces). */
4580 if (TREE_CODE (type) == ARRAY_TYPE
4581 && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type))))
4583 tree str_init = init;
4585 /* Strip one level of braces if and only if they enclose a single
4586 element (as allowed by [dcl.init.string]). */
4587 if (!first_initializer_p
4588 && TREE_CODE (str_init) == CONSTRUCTOR
4589 && VEC_length (constructor_elt, CONSTRUCTOR_ELTS (str_init)) == 1)
4591 str_init = VEC_index (constructor_elt,
4592 CONSTRUCTOR_ELTS (str_init), 0)->value;
4595 /* If it's a string literal, then it's the initializer for the array
4596 as a whole. Otherwise, continue with normal initialization for
4597 array types (one value per array element). */
4598 if (TREE_CODE (str_init) == STRING_CST)
4605 /* The following cases are about aggregates. If we are not within a full
4606 initializer already, and there is not a CONSTRUCTOR, it means that there
4607 is a missing set of braces (that is, we are processing the case for
4608 which reshape_init exists). */
4609 if (!first_initializer_p)
4611 if (TREE_CODE (init) == CONSTRUCTOR)
4613 /* For a nested compound literal, there is no need to reshape since
4614 brace elision is not allowed. Even if we decided to allow it,
4615 we should add a call to reshape_init in finish_compound_literal,
4616 before calling digest_init, so changing this code would still
4617 not be necessary. */
4618 if (!COMPOUND_LITERAL_P (init))
4621 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init));
4622 return reshape_init (type, init);
4625 gcc_assert (!BRACE_ENCLOSED_INITIALIZER_P (init));
4628 warning (OPT_Wmissing_braces, "missing braces around initializer for %qT",
4632 /* Dispatch to specialized routines. */
4633 if (CLASS_TYPE_P (type))
4634 return reshape_init_class (type, d, first_initializer_p);
4635 else if (TREE_CODE (type) == ARRAY_TYPE)
4636 return reshape_init_array (type, d);
4637 else if (TREE_CODE (type) == VECTOR_TYPE)
4638 return reshape_init_vector (type, d);
4643 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
4644 brace-enclosed aggregate initializer.
4646 INIT is the CONSTRUCTOR containing the list of initializers describing
4647 a brace-enclosed initializer for an entity of the indicated aggregate TYPE.
4648 It may not presently match the shape of the TYPE; for example:
4650 struct S { int a; int b; };
4651 struct S a[] = { 1, 2, 3, 4 };
4653 Here INIT will hold a VEC of four elements, rather than a
4654 VEC of two elements, each itself a VEC of two elements. This
4655 routine transforms INIT from the former form into the latter. The
4656 revised CONSTRUCTOR node is returned. */
4659 reshape_init (tree type, tree init)
4661 VEC(constructor_elt, gc) *v;
4665 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init));
4667 v = CONSTRUCTOR_ELTS (init);
4669 /* An empty constructor does not need reshaping, and it is always a valid
4671 if (VEC_empty (constructor_elt, v))
4674 /* Recurse on this CONSTRUCTOR. */
4675 d.cur = VEC_index (constructor_elt, v, 0);
4676 d.end = d.cur + VEC_length (constructor_elt, v);
4678 new_init = reshape_init_r (type, &d, true);
4679 if (new_init == error_mark_node)
4680 return error_mark_node;
4682 /* Make sure all the element of the constructor were used. Otherwise,
4683 issue an error about exceeding initializers. */
4685 error ("too many initializers for %qT", type);
4690 /* Verify INIT (the initializer for DECL), and record the
4691 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
4692 grok_reference_init.
4694 If the return value is non-NULL, it is an expression that must be
4695 evaluated dynamically to initialize DECL. */
4698 check_initializer (tree decl, tree init, int flags, tree *cleanup)
4700 tree type = TREE_TYPE (decl);
4701 tree init_code = NULL;
4703 /* Things that are going to be initialized need to have complete
4705 TREE_TYPE (decl) = type = complete_type (TREE_TYPE (decl));
4707 if (type == error_mark_node)
4708 /* We will have already complained. */
4711 if (TREE_CODE (type) == ARRAY_TYPE)
4713 tree element_type = TREE_TYPE (type);
4715 /* The array type itself need not be complete, because the
4716 initializer may tell us how many elements are in the array.
4717 But, the elements of the array must be complete. */
4718 if (!COMPLETE_TYPE_P (complete_type (element_type)))
4720 error ("elements of array %q#D have incomplete type", decl);
4723 /* It is not valid to initialize a VLA. */
4725 && ((COMPLETE_TYPE_P (type) && !TREE_CONSTANT (TYPE_SIZE (type)))
4726 || !TREE_CONSTANT (TYPE_SIZE (element_type))))
4728 error ("variable-sized object %qD may not be initialized", decl);
4732 else if (!COMPLETE_TYPE_P (type))
4734 error ("%qD has incomplete type", decl);
4735 TREE_TYPE (decl) = error_mark_node;
4739 /* There is no way to make a variable-sized class type in GNU C++. */
4740 gcc_assert (TREE_CONSTANT (TYPE_SIZE (type)));
4742 if (!CP_AGGREGATE_TYPE_P (type)
4743 && init && BRACE_ENCLOSED_INITIALIZER_P (init)
4744 && VEC_length (constructor_elt, CONSTRUCTOR_ELTS (init)) != 1)
4746 error ("scalar object %qD requires one element in initializer", decl);
4747 TREE_TYPE (decl) = error_mark_node;
4751 if (TREE_CODE (decl) == CONST_DECL)
4753 gcc_assert (TREE_CODE (type) != REFERENCE_TYPE);
4755 DECL_INITIAL (decl) = init;
4757 gcc_assert (init != NULL_TREE);
4760 else if (!DECL_EXTERNAL (decl) && TREE_CODE (type) == REFERENCE_TYPE)
4761 init = grok_reference_init (decl, type, init, cleanup);
4764 /* Do not reshape constructors of vectors (they don't need to be
4766 if (TREE_CODE (init) == CONSTRUCTOR
4767 && !COMPOUND_LITERAL_P (init)
4768 && !TREE_TYPE (init)) /* ptrmemfunc */
4770 init = reshape_init (type, init);
4772 if ((*targetm.vector_opaque_p) (type))
4774 error ("opaque vector types cannot be initialized");
4775 init = error_mark_node;
4779 /* If DECL has an array type without a specific bound, deduce the
4780 array size from the initializer. */
4781 maybe_deduce_size_from_array_init (decl, init);
4782 type = TREE_TYPE (decl);
4783 if (type == error_mark_node)
4786 if (TYPE_HAS_CONSTRUCTOR (type) || TYPE_NEEDS_CONSTRUCTING (type))
4788 if (TREE_CODE (type) == ARRAY_TYPE)
4789 goto initialize_aggr;
4790 else if (TREE_CODE (init) == CONSTRUCTOR)
4792 if (TYPE_NON_AGGREGATE_CLASS (type))
4794 error ("%qD must be initialized by constructor, "
4797 init = error_mark_node;
4800 goto dont_use_constructor;
4804 int saved_stmts_are_full_exprs_p;
4807 saved_stmts_are_full_exprs_p = 0;
4808 if (building_stmt_tree ())
4810 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
4811 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
4813 init = build_aggr_init (decl, init, flags);
4814 if (building_stmt_tree ())
4815 current_stmt_tree ()->stmts_are_full_exprs_p =
4816 saved_stmts_are_full_exprs_p;
4822 dont_use_constructor:
4823 if (TREE_CODE (init) != TREE_VEC)
4825 init_code = store_init_value (decl, init);
4826 if (pedantic && TREE_CODE (type) == ARRAY_TYPE
4827 && DECL_INITIAL (decl)
4828 && TREE_CODE (DECL_INITIAL (decl)) == STRING_CST
4829 && PAREN_STRING_LITERAL_P (DECL_INITIAL (decl)))
4830 warning (0, "array %qD initialized by parenthesized string literal %qE",
4831 decl, DECL_INITIAL (decl));
4836 else if (DECL_EXTERNAL (decl))
4838 else if (TYPE_P (type) && TYPE_NEEDS_CONSTRUCTING (type))
4839 goto initialize_aggr;
4840 else if (IS_AGGR_TYPE (type))
4842 tree core_type = strip_array_types (type);
4844 if (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type))
4845 error ("structure %qD with uninitialized const members", decl);
4846 if (CLASSTYPE_REF_FIELDS_NEED_INIT (core_type))
4847 error ("structure %qD with uninitialized reference members", decl);
4849 check_for_uninitialized_const_var (decl);
4852 check_for_uninitialized_const_var (decl);
4854 if (init && init != error_mark_node)
4855 init_code = build2 (INIT_EXPR, type, decl, init);
4860 /* If DECL is not a local variable, give it RTL. */
4863 make_rtl_for_nonlocal_decl (tree decl, tree init, const char* asmspec)
4865 int toplev = toplevel_bindings_p ();
4867 const char *filename;
4869 /* Set the DECL_ASSEMBLER_NAME for the object. */
4872 /* The `register' keyword, when used together with an
4873 asm-specification, indicates that the variable should be
4874 placed in a particular register. */
4875 if (TREE_CODE (decl) == VAR_DECL && DECL_REGISTER (decl))
4877 set_user_assembler_name (decl, asmspec);
4878 DECL_HARD_REGISTER (decl) = 1;
4882 if (TREE_CODE (decl) == FUNCTION_DECL
4883 && DECL_BUILT_IN_CLASS (decl) == BUILT_IN_NORMAL)
4884 set_builtin_user_assembler_name (decl, asmspec);
4885 set_user_assembler_name (decl, asmspec);
4889 /* Handle non-variables up front. */
4890 if (TREE_CODE (decl) != VAR_DECL)
4892 rest_of_decl_compilation (decl, toplev, at_eof);
4896 /* If we see a class member here, it should be a static data
4898 if (DECL_LANG_SPECIFIC (decl) && DECL_IN_AGGR_P (decl))
4900 gcc_assert (TREE_STATIC (decl));
4901 /* An in-class declaration of a static data member should be
4902 external; it is only a declaration, and not a definition. */
4903 if (init == NULL_TREE)
4904 gcc_assert (DECL_EXTERNAL (decl));
4907 /* We don't create any RTL for local variables. */
4908 if (DECL_FUNCTION_SCOPE_P (decl) && !TREE_STATIC (decl))
4911 /* We defer emission of local statics until the corresponding
4912 DECL_EXPR is expanded. */
4913 defer_p = DECL_FUNCTION_SCOPE_P (decl) || DECL_VIRTUAL_P (decl);
4915 /* We try to defer namespace-scope static constants so that they are
4916 not emitted into the object file unnecessarily. */
4917 filename = input_filename;
4918 if (!DECL_VIRTUAL_P (decl)
4919 && TREE_READONLY (decl)
4920 && DECL_INITIAL (decl) != NULL_TREE
4921 && DECL_INITIAL (decl) != error_mark_node
4923 && ! EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl))
4925 && !TREE_PUBLIC (decl))
4927 /* Fool with the linkage of static consts according to #pragma
4929 struct c_fileinfo *finfo = get_fileinfo (filename);
4930 if (!finfo->interface_unknown && !TREE_PUBLIC (decl))
4932 TREE_PUBLIC (decl) = 1;
4933 DECL_EXTERNAL (decl) = finfo->interface_only;
4938 /* Likewise for template instantiations. */
4939 else if (DECL_LANG_SPECIFIC (decl)
4940 && DECL_IMPLICIT_INSTANTIATION (decl))
4943 /* If we're not deferring, go ahead and assemble the variable. */
4945 rest_of_decl_compilation (decl, toplev, at_eof);
4948 /* Generate code to initialize DECL (a local variable). */
4951 initialize_local_var (tree decl, tree init)
4953 tree type = TREE_TYPE (decl);
4956 gcc_assert (TREE_CODE (decl) == VAR_DECL
4957 || TREE_CODE (decl) == RESULT_DECL);
4958 gcc_assert (!TREE_STATIC (decl));
4960 if (DECL_SIZE (decl) == NULL_TREE)
4962 /* If we used it already as memory, it must stay in memory. */
4963 DECL_INITIAL (decl) = NULL_TREE;
4964 TREE_ADDRESSABLE (decl) = TREE_USED (decl);
4967 if (DECL_SIZE (decl) && type != error_mark_node)
4971 /* Compute and store the initial value. */
4972 already_used = TREE_USED (decl) || TREE_USED (type);
4974 /* Perform the initialization. */
4977 int saved_stmts_are_full_exprs_p;
4979 gcc_assert (building_stmt_tree ());
4980 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
4981 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
4982 finish_expr_stmt (init);
4983 current_stmt_tree ()->stmts_are_full_exprs_p =
4984 saved_stmts_are_full_exprs_p;
4987 /* Set this to 0 so we can tell whether an aggregate which was
4988 initialized was ever used. Don't do this if it has a
4989 destructor, so we don't complain about the 'resource
4990 allocation is initialization' idiom. Now set
4991 attribute((unused)) on types so decls of that type will be
4992 marked used. (see TREE_USED, above.) */
4993 if (TYPE_NEEDS_CONSTRUCTING (type)
4995 && TYPE_HAS_TRIVIAL_DESTRUCTOR (type)
4996 && DECL_NAME (decl))
4997 TREE_USED (decl) = 0;
4998 else if (already_used)
4999 TREE_USED (decl) = 1;
5002 /* Generate a cleanup, if necessary. */
5003 cleanup = cxx_maybe_build_cleanup (decl);
5004 if (DECL_SIZE (decl) && cleanup)
5005 finish_decl_cleanup (decl, cleanup);
5008 /* DECL is a VAR_DECL for a compiler-generated variable with static
5009 storage duration (like a virtual table) whose initializer is a
5010 compile-time constant. INIT must be either a TREE_LIST of values,
5011 or a CONSTRUCTOR. Initialize the variable and provide it to the
5015 initialize_artificial_var (tree decl, tree init)
5017 gcc_assert (DECL_ARTIFICIAL (decl));
5018 if (TREE_CODE (init) == TREE_LIST)
5019 init = build_constructor_from_list (NULL_TREE, init);
5020 gcc_assert (TREE_CODE (init) == CONSTRUCTOR);
5021 DECL_INITIAL (decl) = init;
5022 DECL_INITIALIZED_P (decl) = 1;
5023 determine_visibility (decl);
5024 layout_var_decl (decl);
5025 maybe_commonize_var (decl);
5026 make_rtl_for_nonlocal_decl (decl, init, /*asmspec=*/NULL);
5029 /* Finish processing of a declaration;
5030 install its line number and initial value.
5031 If the length of an array type is not known before,
5032 it must be determined now, from the initial value, or it is an error.
5034 INIT is the initializer (if any) for DECL. If INIT_CONST_EXPR_P is
5035 true, then INIT is an integral constant expression.
5037 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
5038 if the (init) syntax was used. */
5041 cp_finish_decl (tree decl, tree init, bool init_const_expr_p,
5042 tree asmspec_tree, int flags)
5046 const char *asmspec = NULL;
5047 int was_readonly = 0;
5048 bool var_definition_p = false;
5049 int saved_processing_template_decl;
5051 if (decl == error_mark_node)
5056 error ("assignment (not initialization) in declaration");
5060 gcc_assert (TREE_CODE (decl) != RESULT_DECL);
5061 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
5062 gcc_assert (TREE_CODE (decl) != PARM_DECL);
5064 type = TREE_TYPE (decl);
5065 if (type == error_mark_node)
5068 /* Assume no cleanup is required. */
5069 cleanup = NULL_TREE;
5070 saved_processing_template_decl = processing_template_decl;
5072 /* If a name was specified, get the string. */
5073 if (global_scope_p (current_binding_level))
5074 asmspec_tree = maybe_apply_renaming_pragma (decl, asmspec_tree);
5075 if (asmspec_tree && asmspec_tree != error_mark_node)
5076 asmspec = TREE_STRING_POINTER (asmspec_tree);
5078 if (current_class_type
5079 && CP_DECL_CONTEXT (decl) == current_class_type
5080 && TYPE_BEING_DEFINED (current_class_type)
5081 && (DECL_INITIAL (decl) || init))
5082 DECL_INITIALIZED_IN_CLASS_P (decl) = 1;
5084 if (processing_template_decl)
5086 bool type_dependent_p;
5088 /* Add this declaration to the statement-tree. */
5089 if (at_function_scope_p ())
5090 add_decl_expr (decl);
5092 type_dependent_p = dependent_type_p (type);
5094 if (init && init_const_expr_p)
5096 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl) = 1;
5097 if (DECL_INTEGRAL_CONSTANT_VAR_P (decl))
5098 TREE_CONSTANT (decl) = 1;
5102 || !DECL_CLASS_SCOPE_P (decl)
5103 || !DECL_INTEGRAL_CONSTANT_VAR_P (decl)
5105 || value_dependent_expression_p (init)
5106 /* Check also if initializer is a value dependent
5107 { integral_constant_expression }. */
5108 || (TREE_CODE (init) == CONSTRUCTOR
5109 && VEC_length (constructor_elt, CONSTRUCTOR_ELTS (init)) == 1
5110 && value_dependent_expression_p
5111 (VEC_index (constructor_elt,
5112 CONSTRUCTOR_ELTS (init), 0)->value)))
5115 DECL_INITIAL (decl) = init;
5116 if (TREE_CODE (decl) == VAR_DECL
5117 && !DECL_PRETTY_FUNCTION_P (decl)
5118 && !type_dependent_p)
5119 maybe_deduce_size_from_array_init (decl, init);
5123 init = fold_non_dependent_expr (init);
5124 processing_template_decl = 0;
5127 /* Take care of TYPE_DECLs up front. */
5128 if (TREE_CODE (decl) == TYPE_DECL)
5130 if (type != error_mark_node
5131 && IS_AGGR_TYPE (type) && DECL_NAME (decl))
5133 if (TREE_TYPE (DECL_NAME (decl)) && TREE_TYPE (decl) != type)
5134 warning (0, "shadowing previous type declaration of %q#D", decl);
5135 set_identifier_type_value (DECL_NAME (decl), decl);
5138 /* If we have installed this as the canonical typedef for this
5139 type, and that type has not been defined yet, delay emitting
5140 the debug information for it, as we will emit it later. */
5141 if (TYPE_MAIN_DECL (TREE_TYPE (decl)) == decl
5142 && !COMPLETE_TYPE_P (TREE_TYPE (decl)))
5143 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
5145 rest_of_decl_compilation (decl, DECL_CONTEXT (decl) == NULL_TREE,
5150 /* A reference will be modified here, as it is initialized. */
5151 if (! DECL_EXTERNAL (decl)
5152 && TREE_READONLY (decl)
5153 && TREE_CODE (type) == REFERENCE_TYPE)
5156 TREE_READONLY (decl) = 0;
5159 if (TREE_CODE (decl) == VAR_DECL)
5161 /* Only PODs can have thread-local storage. Other types may require
5162 various kinds of non-trivial initialization. */
5163 if (DECL_THREAD_LOCAL_P (decl) && !pod_type_p (TREE_TYPE (decl)))
5164 error ("%qD cannot be thread-local because it has non-POD type %qT",
5165 decl, TREE_TYPE (decl));
5166 /* If this is a local variable that will need a mangled name,
5167 register it now. We must do this before processing the
5168 initializer for the variable, since the initialization might
5169 require a guard variable, and since the mangled name of the
5170 guard variable will depend on the mangled name of this
5172 if (!processing_template_decl
5173 && DECL_FUNCTION_SCOPE_P (decl)
5174 && TREE_STATIC (decl)
5175 && !DECL_ARTIFICIAL (decl))
5176 push_local_name (decl);
5177 /* Convert the initializer to the type of DECL, if we have not
5178 already initialized DECL. */
5179 if (!DECL_INITIALIZED_P (decl)
5180 /* If !DECL_EXTERNAL then DECL is being defined. In the
5181 case of a static data member initialized inside the
5182 class-specifier, there can be an initializer even if DECL
5183 is *not* defined. */
5184 && (!DECL_EXTERNAL (decl) || init))
5188 DECL_NONTRIVIALLY_INITIALIZED_P (decl) = 1;
5189 if (init_const_expr_p)
5191 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl) = 1;
5192 if (DECL_INTEGRAL_CONSTANT_VAR_P (decl))
5193 TREE_CONSTANT (decl) = 1;
5196 init = check_initializer (decl, init, flags, &cleanup);
5197 /* Thread-local storage cannot be dynamically initialized. */
5198 if (DECL_THREAD_LOCAL_P (decl) && init)
5200 error ("%qD is thread-local and so cannot be dynamically "
5201 "initialized", decl);
5205 /* Check that the initializer for a static data member was a
5206 constant. Although we check in the parser that the
5207 initializer is an integral constant expression, we do not
5208 simplify division-by-zero at the point at which it
5209 occurs. Therefore, in:
5211 struct S { static const int i = 7 / 0; };
5213 we issue an error at this point. It would
5214 probably be better to forbid division by zero in
5215 integral constant expressions. */
5216 if (DECL_EXTERNAL (decl) && init)
5218 error ("%qD cannot be initialized by a non-constant expression"
5219 " when being declared", decl);
5220 DECL_INITIALIZED_IN_CLASS_P (decl) = 0;
5228 The memory occupied by any object of static storage
5229 duration is zero-initialized at program startup before
5230 any other initialization takes place.
5232 We cannot create an appropriate initializer until after
5233 the type of DECL is finalized. If DECL_INITIAL is set,
5234 then the DECL is statically initialized, and any
5235 necessary zero-initialization has already been performed. */
5236 if (TREE_STATIC (decl) && !DECL_INITIAL (decl))
5237 DECL_INITIAL (decl) = build_zero_init (TREE_TYPE (decl),
5238 /*nelts=*/NULL_TREE,
5239 /*static_storage_p=*/true);
5240 /* Remember that the initialization for this variable has
5242 DECL_INITIALIZED_P (decl) = 1;
5243 /* This declaration is the definition of this variable,
5244 unless we are initializing a static data member within
5245 the class specifier. */
5246 if (!DECL_EXTERNAL (decl))
5247 var_definition_p = true;
5249 /* If the variable has an array type, lay out the type, even if
5250 there is no initializer. It is valid to index through the
5251 array, and we must get TYPE_ALIGN set correctly on the array
5253 else if (TREE_CODE (type) == ARRAY_TYPE)
5257 /* Add this declaration to the statement-tree. This needs to happen
5258 after the call to check_initializer so that the DECL_EXPR for a
5259 reference temp is added before the DECL_EXPR for the reference itself. */
5260 if (at_function_scope_p ())
5261 add_decl_expr (decl);
5263 /* Let the middle end know about variables and functions -- but not
5264 static data members in uninstantiated class templates. */
5265 if (!saved_processing_template_decl
5266 && (TREE_CODE (decl) == VAR_DECL
5267 || TREE_CODE (decl) == FUNCTION_DECL))
5269 if (TREE_CODE (decl) == VAR_DECL)
5271 layout_var_decl (decl);
5272 maybe_commonize_var (decl);
5273 if (DECL_NAMESPACE_SCOPE_P (decl) && !TREE_PUBLIC (decl)
5274 && !DECL_THIS_STATIC (decl) && !DECL_ARTIFICIAL (decl))
5276 /* This is a const variable with implicit 'static'. Set
5277 DECL_THIS_STATIC so we can tell it from variables that are
5278 !TREE_PUBLIC because of the anonymous namespace. */
5279 DECL_THIS_STATIC (decl) = 1;
5283 make_rtl_for_nonlocal_decl (decl, init, asmspec);
5285 /* Check for abstractness of the type. Notice that there is no
5286 need to strip array types here since the check for those types
5287 is already done within create_array_type_for_decl. */
5288 if (TREE_CODE (type) == FUNCTION_TYPE
5289 || TREE_CODE (type) == METHOD_TYPE)
5290 abstract_virtuals_error (decl, TREE_TYPE (type));
5292 abstract_virtuals_error (decl, type);
5294 /* This needs to happen after the linkage is set. */
5295 determine_visibility (decl);
5297 if (TREE_CODE (decl) == FUNCTION_DECL
5298 || TREE_TYPE (decl) == error_mark_node)
5299 /* No initialization required. */
5301 else if (DECL_EXTERNAL (decl)
5302 && ! (DECL_LANG_SPECIFIC (decl)
5303 && DECL_NOT_REALLY_EXTERN (decl)))
5306 DECL_INITIAL (decl) = init;
5310 /* A variable definition. */
5311 if (DECL_FUNCTION_SCOPE_P (decl))
5313 /* Initialize the local variable. */
5314 if (processing_template_decl)
5315 DECL_INITIAL (decl) = init;
5316 else if (!TREE_STATIC (decl))
5317 initialize_local_var (decl, init);
5320 /* If a variable is defined, and then a subsequent
5321 definition with external linkage is encountered, we will
5322 get here twice for the same variable. We want to avoid
5323 calling expand_static_init more than once. For variables
5324 that are not static data members, we can call
5325 expand_static_init only when we actually process the
5326 initializer. It is not legal to redeclare a static data
5327 member, so this issue does not arise in that case. */
5328 if (var_definition_p && TREE_STATIC (decl))
5329 expand_static_init (decl, init);
5333 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
5334 reference, insert it in the statement-tree now. */
5336 push_cleanup (decl, cleanup, false);
5339 processing_template_decl = saved_processing_template_decl;
5342 TREE_READONLY (decl) = 1;
5344 /* If this was marked 'used', be sure it will be output. */
5345 if (lookup_attribute ("used", DECL_ATTRIBUTES (decl)))
5346 mark_decl_referenced (decl);
5349 /* This is here for a midend callback from c-common.c. */
5352 finish_decl (tree decl, tree init, tree asmspec_tree)
5354 cp_finish_decl (decl, init, /*init_const_expr_p=*/false, asmspec_tree, 0);
5357 /* Returns a declaration for a VAR_DECL as if:
5359 extern "C" TYPE NAME;
5361 had been seen. Used to create compiler-generated global
5365 declare_global_var (tree name, tree type)
5369 push_to_top_level ();
5370 decl = build_decl (VAR_DECL, name, type);
5371 TREE_PUBLIC (decl) = 1;
5372 DECL_EXTERNAL (decl) = 1;
5373 DECL_ARTIFICIAL (decl) = 1;
5374 /* If the user has explicitly declared this variable (perhaps
5375 because the code we are compiling is part of a low-level runtime
5376 library), then it is possible that our declaration will be merged
5377 with theirs by pushdecl. */
5378 decl = pushdecl (decl);
5379 finish_decl (decl, NULL_TREE, NULL_TREE);
5380 pop_from_top_level ();
5385 /* Returns a pointer to the `atexit' function. Note that if
5386 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
5387 `__cxa_atexit' function specified in the IA64 C++ ABI. */
5390 get_atexit_node (void)
5397 bool use_aeabi_atexit;
5402 if (flag_use_cxa_atexit && !targetm.cxx.use_atexit_for_cxa_atexit ())
5404 /* The declaration for `__cxa_atexit' is:
5406 int __cxa_atexit (void (*)(void *), void *, void *)
5408 We build up the argument types and then then function type
5411 use_aeabi_atexit = targetm.cxx.use_aeabi_atexit ();
5412 /* First, build the pointer-to-function type for the first
5414 arg_types = tree_cons (NULL_TREE, ptr_type_node, void_list_node);
5415 fn_type = build_function_type (void_type_node, arg_types);
5416 fn_ptr_type = build_pointer_type (fn_type);
5417 /* Then, build the rest of the argument types. */
5418 arg_types = tree_cons (NULL_TREE, ptr_type_node, void_list_node);
5419 if (use_aeabi_atexit)
5421 arg_types = tree_cons (NULL_TREE, fn_ptr_type, arg_types);
5422 arg_types = tree_cons (NULL_TREE, ptr_type_node, arg_types);
5426 arg_types = tree_cons (NULL_TREE, ptr_type_node, arg_types);
5427 arg_types = tree_cons (NULL_TREE, fn_ptr_type, arg_types);
5429 /* And the final __cxa_atexit type. */
5430 fn_type = build_function_type (integer_type_node, arg_types);
5431 fn_ptr_type = build_pointer_type (fn_type);
5432 if (use_aeabi_atexit)
5433 name = "__aeabi_atexit";
5435 name = "__cxa_atexit";
5439 /* The declaration for `atexit' is:
5441 int atexit (void (*)());
5443 We build up the argument types and then then function type
5445 fn_type = build_function_type (void_type_node, void_list_node);
5446 fn_ptr_type = build_pointer_type (fn_type);
5447 arg_types = tree_cons (NULL_TREE, fn_ptr_type, void_list_node);
5448 /* Build the final atexit type. */
5449 fn_type = build_function_type (integer_type_node, arg_types);
5453 /* Now, build the function declaration. */
5454 push_lang_context (lang_name_c);
5455 atexit_fndecl = build_library_fn_ptr (name, fn_type);
5456 mark_used (atexit_fndecl);
5457 pop_lang_context ();
5458 atexit_node = decay_conversion (atexit_fndecl);
5463 /* Returns the __dso_handle VAR_DECL. */
5466 get_dso_handle_node (void)
5468 if (dso_handle_node)
5469 return dso_handle_node;
5471 /* Declare the variable. */
5472 dso_handle_node = declare_global_var (get_identifier ("__dso_handle"),
5475 return dso_handle_node;
5478 /* Begin a new function with internal linkage whose job will be simply
5479 to destroy some particular variable. */
5481 static GTY(()) int start_cleanup_cnt;
5484 start_cleanup_fn (void)
5490 bool use_cxa_atexit = flag_use_cxa_atexit
5491 && !targetm.cxx.use_atexit_for_cxa_atexit ();
5493 push_to_top_level ();
5495 /* No need to mangle this. */
5496 push_lang_context (lang_name_c);
5498 /* Build the parameter-types. */
5499 parmtypes = void_list_node;
5500 /* Functions passed to __cxa_atexit take an additional parameter.
5501 We'll just ignore it. After we implement the new calling
5502 convention for destructors, we can eliminate the use of
5503 additional cleanup functions entirely in the -fnew-abi case. */
5505 parmtypes = tree_cons (NULL_TREE, ptr_type_node, parmtypes);
5506 /* Build the function type itself. */
5507 fntype = build_function_type (void_type_node, parmtypes);
5508 /* Build the name of the function. */
5509 sprintf (name, "__tcf_%d", start_cleanup_cnt++);
5510 /* Build the function declaration. */
5511 fndecl = build_lang_decl (FUNCTION_DECL, get_identifier (name), fntype);
5512 /* It's a function with internal linkage, generated by the
5514 TREE_PUBLIC (fndecl) = 0;
5515 DECL_ARTIFICIAL (fndecl) = 1;
5516 /* Make the function `inline' so that it is only emitted if it is
5517 actually needed. It is unlikely that it will be inlined, since
5518 it is only called via a function pointer, but we avoid unnecessary
5519 emissions this way. */
5520 DECL_INLINE (fndecl) = 1;
5521 DECL_DECLARED_INLINE_P (fndecl) = 1;
5522 DECL_INTERFACE_KNOWN (fndecl) = 1;
5523 /* Build the parameter. */
5528 parmdecl = cp_build_parm_decl (NULL_TREE, ptr_type_node);
5529 DECL_CONTEXT (parmdecl) = fndecl;
5530 TREE_USED (parmdecl) = 1;
5531 DECL_ARGUMENTS (fndecl) = parmdecl;
5535 start_preparsed_function (fndecl, NULL_TREE, SF_PRE_PARSED);
5537 pop_lang_context ();
5539 return current_function_decl;
5542 /* Finish the cleanup function begun by start_cleanup_fn. */
5545 end_cleanup_fn (void)
5547 expand_or_defer_fn (finish_function (0));
5549 pop_from_top_level ();
5552 /* Generate code to handle the destruction of DECL, an object with
5553 static storage duration. */
5556 register_dtor_fn (tree decl)
5563 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
5564 return void_zero_node;
5566 /* Call build_cleanup before we enter the anonymous function so that
5567 any access checks will be done relative to the current scope,
5568 rather than the scope of the anonymous function. */
5569 build_cleanup (decl);
5571 /* Now start the function. */
5572 cleanup = start_cleanup_fn ();
5574 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
5575 to the original function, rather than the anonymous one. That
5576 will make the back end think that nested functions are in use,
5577 which causes confusion. */
5579 push_deferring_access_checks (dk_no_check);
5580 fcall = build_cleanup (decl);
5581 pop_deferring_access_checks ();
5583 /* Create the body of the anonymous function. */
5584 compound_stmt = begin_compound_stmt (BCS_FN_BODY);
5585 finish_expr_stmt (fcall);
5586 finish_compound_stmt (compound_stmt);
5589 /* Call atexit with the cleanup function. */
5590 cxx_mark_addressable (cleanup);
5591 mark_used (cleanup);
5592 cleanup = build_unary_op (ADDR_EXPR, cleanup, 0);
5593 if (flag_use_cxa_atexit && !targetm.cxx.use_atexit_for_cxa_atexit ())
5595 args = tree_cons (NULL_TREE,
5596 build_unary_op (ADDR_EXPR, get_dso_handle_node (), 0),
5598 if (targetm.cxx.use_aeabi_atexit ())
5600 args = tree_cons (NULL_TREE, cleanup, args);
5601 args = tree_cons (NULL_TREE, null_pointer_node, args);
5605 args = tree_cons (NULL_TREE, null_pointer_node, args);
5606 args = tree_cons (NULL_TREE, cleanup, args);
5610 args = tree_cons (NULL_TREE, cleanup, NULL_TREE);
5611 return build_function_call (get_atexit_node (), args);
5614 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
5615 is its initializer. Generate code to handle the construction
5616 and destruction of DECL. */
5619 expand_static_init (tree decl, tree init)
5621 gcc_assert (TREE_CODE (decl) == VAR_DECL);
5622 gcc_assert (TREE_STATIC (decl));
5624 /* Some variables require no initialization. */
5626 && !TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl))
5627 && TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
5630 if (DECL_FUNCTION_SCOPE_P (decl))
5632 /* Emit code to perform this initialization but once. */
5633 tree if_stmt = NULL_TREE, inner_if_stmt = NULL_TREE;
5634 tree then_clause = NULL_TREE, inner_then_clause = NULL_TREE;
5635 tree guard, guard_addr;
5636 tree acquire_fn, release_fn, abort_fn;
5639 /* Emit code to perform this initialization but once. This code
5642 static <type> guard;
5643 if (!guard.first_byte) {
5644 if (__cxa_guard_acquire (&guard)) {
5647 // Do initialization.
5648 flag = true; __cxa_guard_release (&guard);
5649 // Register variable for destruction at end of program.
5651 if (!flag) __cxa_guard_abort (&guard);
5655 Note that the `flag' variable is only set to 1 *after* the
5656 initialization is complete. This ensures that an exception,
5657 thrown during the construction, will cause the variable to
5658 reinitialized when we pass through this code again, as per:
5662 If the initialization exits by throwing an exception, the
5663 initialization is not complete, so it will be tried again
5664 the next time control enters the declaration.
5666 This process should be thread-safe, too; multiple threads
5667 should not be able to initialize the variable more than
5670 /* Create the guard variable. */
5671 guard = get_guard (decl);
5673 /* This optimization isn't safe on targets with relaxed memory
5674 consistency. On such targets we force synchronization in
5675 __cxa_guard_acquire. */
5676 if (!targetm.relaxed_ordering || !flag_threadsafe_statics)
5678 /* Begin the conditional initialization. */
5679 if_stmt = begin_if_stmt ();
5680 finish_if_stmt_cond (get_guard_cond (guard), if_stmt);
5681 then_clause = begin_compound_stmt (BCS_NO_SCOPE);
5684 if (flag_threadsafe_statics)
5686 guard_addr = build_address (guard);
5688 acquire_fn = get_identifier ("__cxa_guard_acquire");
5689 release_fn = get_identifier ("__cxa_guard_release");
5690 abort_fn = get_identifier ("__cxa_guard_abort");
5691 if (!get_global_value_if_present (acquire_fn, &acquire_fn))
5693 tree argtypes = tree_cons (NULL_TREE, TREE_TYPE (guard_addr),
5695 tree vfntype = build_function_type (void_type_node, argtypes);
5696 acquire_fn = push_library_fn
5697 (acquire_fn, build_function_type (integer_type_node, argtypes));
5698 release_fn = push_library_fn (release_fn, vfntype);
5699 abort_fn = push_library_fn (abort_fn, vfntype);
5703 release_fn = identifier_global_value (release_fn);
5704 abort_fn = identifier_global_value (abort_fn);
5707 inner_if_stmt = begin_if_stmt ();
5708 finish_if_stmt_cond (build_call_n (acquire_fn, 1, guard_addr),
5711 inner_then_clause = begin_compound_stmt (BCS_NO_SCOPE);
5712 begin = get_target_expr (boolean_false_node);
5713 flag = TARGET_EXPR_SLOT (begin);
5715 TARGET_EXPR_CLEANUP (begin)
5716 = build3 (COND_EXPR, void_type_node, flag,
5718 build_call_n (abort_fn, 1, guard_addr));
5719 CLEANUP_EH_ONLY (begin) = 1;
5721 /* Do the initialization itself. */
5722 init = add_stmt_to_compound (begin, init);
5723 init = add_stmt_to_compound
5724 (init, build2 (MODIFY_EXPR, void_type_node, flag, boolean_true_node));
5725 init = add_stmt_to_compound
5726 (init, build_call_n (release_fn, 1, guard_addr));
5729 init = add_stmt_to_compound (init, set_guard (guard));
5731 /* Use atexit to register a function for destroying this static
5733 init = add_stmt_to_compound (init, register_dtor_fn (decl));
5735 finish_expr_stmt (init);
5737 if (flag_threadsafe_statics)
5739 finish_compound_stmt (inner_then_clause);
5740 finish_then_clause (inner_if_stmt);
5741 finish_if_stmt (inner_if_stmt);
5744 if (!targetm.relaxed_ordering || !flag_threadsafe_statics)
5746 finish_compound_stmt (then_clause);
5747 finish_then_clause (if_stmt);
5748 finish_if_stmt (if_stmt);
5752 static_aggregates = tree_cons (init, decl, static_aggregates);
5756 /* Make TYPE a complete type based on INITIAL_VALUE.
5757 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
5758 2 if there was no information (in which case assume 0 if DO_DEFAULT),
5759 3 if the initializer list is empty (in pedantic mode). */
5762 cp_complete_array_type (tree *ptype, tree initial_value, bool do_default)
5765 tree type, elt_type;
5769 /* An array of character type can be initialized from a
5770 brace-enclosed string constant.
5772 FIXME: this code is duplicated from reshape_init. Probably
5773 we should just call reshape_init here? */
5774 if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (*ptype)))
5775 && TREE_CODE (initial_value) == CONSTRUCTOR
5776 && !VEC_empty (constructor_elt, CONSTRUCTOR_ELTS (initial_value)))
5778 VEC(constructor_elt,gc) *v = CONSTRUCTOR_ELTS (initial_value);
5779 tree value = VEC_index (constructor_elt, v, 0)->value;
5781 if (TREE_CODE (value) == STRING_CST
5782 && VEC_length (constructor_elt, v) == 1)
5783 initial_value = value;
5787 failure = complete_array_type (ptype, initial_value, do_default);
5789 /* We can create the array before the element type is complete, which
5790 means that we didn't have these two bits set in the original type
5791 either. In completing the type, we are expected to propagate these
5792 bits. See also complete_type which does the same thing for arrays
5795 if (TYPE_DOMAIN (type))
5797 elt_type = TREE_TYPE (type);
5798 TYPE_NEEDS_CONSTRUCTING (type) = TYPE_NEEDS_CONSTRUCTING (elt_type);
5799 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type)
5800 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (elt_type);
5806 /* Return zero if something is declared to be a member of type
5807 CTYPE when in the context of CUR_TYPE. STRING is the error
5808 message to print in that case. Otherwise, quietly return 1. */
5811 member_function_or_else (tree ctype, tree cur_type, enum overload_flags flags)
5813 if (ctype && ctype != cur_type)
5815 if (flags == DTOR_FLAG)
5816 error ("destructor for alien class %qT cannot be a member", ctype);
5818 error ("constructor for alien class %qT cannot be a member", ctype);
5824 /* Subroutine of `grokdeclarator'. */
5826 /* Generate errors possibly applicable for a given set of specifiers.
5827 This is for ARM $7.1.2. */
5830 bad_specifiers (tree object,
5839 error ("%qD declared as a %<virtual%> %s", object, type);
5841 error ("%qD declared as an %<inline%> %s", object, type);
5843 error ("%<const%> and %<volatile%> function specifiers on "
5844 "%qD invalid in %s declaration",
5847 error ("%q+D declared as a friend", object);
5849 && (TREE_CODE (object) == TYPE_DECL
5850 || (!TYPE_PTRFN_P (TREE_TYPE (object))
5851 && !TYPE_REFFN_P (TREE_TYPE (object))
5852 && !TYPE_PTRMEMFUNC_P (TREE_TYPE (object)))))
5853 error ("%q+D declared with an exception specification", object);
5856 /* DECL is a member function or static data member and is presently
5857 being defined. Check that the definition is taking place in a
5861 check_class_member_definition_namespace (tree decl)
5863 /* These checks only apply to member functions and static data
5865 gcc_assert (TREE_CODE (decl) == FUNCTION_DECL
5866 || TREE_CODE (decl) == VAR_DECL);
5867 /* We check for problems with specializations in pt.c in
5868 check_specialization_namespace, where we can issue better
5870 if (processing_specialization)
5872 /* There are no restrictions on the placement of
5873 explicit instantiations. */
5874 if (processing_explicit_instantiation)
5878 A member function definition that appears outside of the
5879 class definition shall appear in a namespace scope enclosing
5880 the class definition.
5884 The definition for a static data member shall appear in a
5885 namespace scope enclosing the member's class definition. */
5886 if (!is_ancestor (current_namespace, DECL_CONTEXT (decl)))
5887 pedwarn ("definition of %qD is not in namespace enclosing %qT",
5888 decl, DECL_CONTEXT (decl));
5891 /* Build a PARM_DECL for the "this" parameter. TYPE is the
5892 METHOD_TYPE for a non-static member function; QUALS are the
5893 cv-qualifiers that apply to the function. */
5896 build_this_parm (tree type, cp_cv_quals quals)
5901 cp_cv_quals this_quals;
5903 this_type = TREE_VALUE (TYPE_ARG_TYPES (type));
5904 /* The `this' parameter is implicitly `const'; it cannot be
5906 this_quals = (quals & TYPE_QUAL_RESTRICT) | TYPE_QUAL_CONST;
5907 qual_type = cp_build_qualified_type (this_type, this_quals);
5908 parm = build_artificial_parm (this_identifier, qual_type);
5909 cp_apply_type_quals_to_decl (this_quals, parm);
5913 /* CTYPE is class type, or null if non-class.
5914 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
5916 DECLARATOR is the function's name.
5917 PARMS is a chain of PARM_DECLs for the function.
5918 VIRTUALP is truthvalue of whether the function is virtual or not.
5919 FLAGS are to be passed through to `grokclassfn'.
5920 QUALS are qualifiers indicating whether the function is `const'
5922 RAISES is a list of exceptions that this function can raise.
5923 CHECK is 1 if we must find this method in CTYPE, 0 if we should
5924 not look, and -1 if we should not call `grokclassfn' at all.
5926 SFK is the kind of special function (if any) for the new function.
5928 Returns `NULL_TREE' if something goes wrong, after issuing
5929 applicable error messages. */
5932 grokfndecl (tree ctype,
5936 tree orig_declarator,
5938 enum overload_flags flags,
5945 special_function_kind sfk,
5952 int staticp = ctype && TREE_CODE (type) == FUNCTION_TYPE;
5956 type = build_exception_variant (type, raises);
5958 decl = build_lang_decl (FUNCTION_DECL, declarator, type);
5959 if (TREE_CODE (type) == METHOD_TYPE)
5962 parm = build_this_parm (type, quals);
5963 TREE_CHAIN (parm) = parms;
5966 DECL_ARGUMENTS (decl) = parms;
5967 /* Propagate volatile out from type to decl. */
5968 if (TYPE_VOLATILE (type))
5969 TREE_THIS_VOLATILE (decl) = 1;
5972 && TREE_CODE (orig_declarator) == TEMPLATE_ID_EXPR)
5976 ("defining explicit specialization %qD in friend declaration",
5980 tree fns = TREE_OPERAND (orig_declarator, 0);
5981 tree args = TREE_OPERAND (orig_declarator, 1);
5983 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
5985 /* Something like `template <class T> friend void f<T>()'. */
5986 error ("invalid use of template-id %qD in declaration "
5987 "of primary template",
5993 /* A friend declaration of the form friend void f<>(). Record
5994 the information in the TEMPLATE_ID_EXPR. */
5995 SET_DECL_IMPLICIT_INSTANTIATION (decl);
5997 if (TREE_CODE (fns) == COMPONENT_REF)
5999 /* Due to bison parser ickiness, we will have already looked
6000 up an operator_name or PFUNCNAME within the current class
6001 (see template_id in parse.y). If the current class contains
6002 such a name, we'll get a COMPONENT_REF here. Undo that. */
6004 gcc_assert (TREE_TYPE (TREE_OPERAND (fns, 0))
6005 == current_class_type);
6006 fns = TREE_OPERAND (fns, 1);
6008 gcc_assert (TREE_CODE (fns) == IDENTIFIER_NODE
6009 || TREE_CODE (fns) == OVERLOAD);
6010 DECL_TEMPLATE_INFO (decl) = tree_cons (fns, args, NULL_TREE);
6012 for (t = TYPE_ARG_TYPES (TREE_TYPE (decl)); t; t = TREE_CHAIN (t))
6013 if (TREE_PURPOSE (t)
6014 && TREE_CODE (TREE_PURPOSE (t)) == DEFAULT_ARG)
6016 error ("default arguments are not allowed in declaration "
6017 "of friend template specialization %qD",
6024 error ("%<inline%> is not allowed in declaration of friend "
6025 "template specialization %qD",
6032 /* If this decl has namespace scope, set that up. */
6034 set_decl_namespace (decl, in_namespace, friendp);
6036 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
6038 /* `main' and builtins have implicit 'C' linkage. */
6039 if ((MAIN_NAME_P (declarator)
6040 || (IDENTIFIER_LENGTH (declarator) > 10
6041 && IDENTIFIER_POINTER (declarator)[0] == '_'
6042 && IDENTIFIER_POINTER (declarator)[1] == '_'
6043 && strncmp (IDENTIFIER_POINTER (declarator)+2, "builtin_", 8) == 0))
6044 && current_lang_name == lang_name_cplusplus
6045 && ctype == NULL_TREE
6046 /* NULL_TREE means global namespace. */
6047 && DECL_CONTEXT (decl) == NULL_TREE)
6048 SET_DECL_LANGUAGE (decl, lang_c);
6050 /* Should probably propagate const out from type to decl I bet (mrs). */
6053 DECL_STATIC_FUNCTION_P (decl) = 1;
6054 DECL_CONTEXT (decl) = ctype;
6059 DECL_CONTEXT (decl) = ctype;
6061 check_class_member_definition_namespace (decl);
6064 if (ctype == NULL_TREE && DECL_MAIN_P (decl))
6066 if (processing_template_decl)
6067 error ("cannot declare %<::main%> to be a template");
6069 error ("cannot declare %<::main%> to be inline");
6071 error ("cannot declare %<::main%> to be static");
6076 /* Members of anonymous types and local classes have no linkage; make
6077 them internal. If a typedef is made later, this will be changed. */
6078 if (ctype && (TYPE_ANONYMOUS_P (ctype)
6079 || decl_function_context (TYPE_MAIN_DECL (ctype))))
6084 /* [basic.link]: A name with no linkage (notably, the name of a class
6085 or enumeration declared in a local scope) shall not be used to
6086 declare an entity with linkage.
6088 Only check this for public decls for now. See core 319, 389. */
6089 t = no_linkage_check (TREE_TYPE (decl),
6090 /*relaxed_p=*/false);
6093 if (TYPE_ANONYMOUS_P (t))
6095 if (DECL_EXTERN_C_P (decl))
6096 /* Allow this; it's pretty common in C. */;
6099 pedwarn ("non-local function %q#D uses anonymous type",
6101 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
6102 pedwarn ("%q+#D does not refer to the unqualified "
6103 "type, so it is not used for linkage",
6108 pedwarn ("non-local function %q#D uses local type %qT", decl, t);
6112 TREE_PUBLIC (decl) = publicp;
6115 DECL_INTERFACE_KNOWN (decl) = 1;
6116 DECL_NOT_REALLY_EXTERN (decl) = 1;
6119 /* If the declaration was declared inline, mark it as such. */
6121 DECL_DECLARED_INLINE_P (decl) = 1;
6122 /* We inline functions that are explicitly declared inline, or, when
6123 the user explicitly asks us to, all functions. */
6124 if (DECL_DECLARED_INLINE_P (decl)
6125 || (flag_inline_trees == 2 && !DECL_INLINE (decl) && funcdef_flag))
6126 DECL_INLINE (decl) = 1;
6128 DECL_EXTERNAL (decl) = 1;
6129 if (quals && TREE_CODE (type) == FUNCTION_TYPE)
6132 ? G_("static member function %qD cannot have cv-qualifier")
6133 : G_("non-member function %qD cannot have cv-qualifier"),
6135 quals = TYPE_UNQUALIFIED;
6138 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl))
6139 && !grok_op_properties (decl, /*complain=*/true))
6142 if (ctype && decl_function_context (decl))
6143 DECL_NO_STATIC_CHAIN (decl) = 1;
6146 /* Make the init_value nonzero so pushdecl knows this is not
6147 tentative. error_mark_node is replaced later with the BLOCK. */
6148 DECL_INITIAL (decl) = error_mark_node;
6150 if (TYPE_NOTHROW_P (type) || nothrow_libfn_p (decl))
6151 TREE_NOTHROW (decl) = 1;
6153 /* Caller will do the rest of this. */
6157 if (ctype != NULL_TREE)
6159 if (sfk == sfk_constructor)
6160 DECL_CONSTRUCTOR_P (decl) = 1;
6162 grokclassfn (ctype, decl, flags);
6165 decl = check_explicit_specialization (orig_declarator, decl,
6168 4 * (friendp != 0));
6169 if (decl == error_mark_node)
6174 cplus_decl_attributes (&decl, *attrlist, 0);
6175 *attrlist = NULL_TREE;
6178 /* Check main's type after attributes have been applied. */
6179 if (ctype == NULL_TREE && DECL_MAIN_P (decl))
6181 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl)),
6184 tree oldtypeargs = TYPE_ARG_TYPES (TREE_TYPE (decl));
6186 error ("%<::main%> must return %<int%>");
6187 newtype = build_function_type (integer_type_node, oldtypeargs);
6188 TREE_TYPE (decl) = newtype;
6190 check_main_parameter_types (decl);
6193 if (ctype != NULL_TREE
6194 && (! TYPE_FOR_JAVA (ctype) || check_java_method (decl))
6199 old_decl = check_classfn (ctype, decl,
6200 (processing_template_decl
6201 > template_class_depth (ctype))
6202 ? current_template_parms
6209 if (TREE_CODE (old_decl) == TEMPLATE_DECL)
6210 /* Because grokfndecl is always supposed to return a
6211 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
6212 here. We depend on our callers to figure out that its
6213 really a template that's being returned. */
6214 old_decl = DECL_TEMPLATE_RESULT (old_decl);
6216 if (DECL_STATIC_FUNCTION_P (old_decl)
6217 && TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE)
6218 /* Remove the `this' parm added by grokclassfn.
6219 XXX Isn't this done in start_function, too? */
6220 revert_static_member_fn (decl);
6221 if (DECL_ARTIFICIAL (old_decl))
6222 error ("definition of implicitly-declared %qD", old_decl);
6224 /* Since we've smashed OLD_DECL to its
6225 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
6226 if (TREE_CODE (decl) == TEMPLATE_DECL)
6227 decl = DECL_TEMPLATE_RESULT (decl);
6229 /* Attempt to merge the declarations. This can fail, in
6230 the case of some invalid specialization declarations. */
6231 pushed_scope = push_scope (ctype);
6232 ok = duplicate_decls (decl, old_decl, friendp);
6234 pop_scope (pushed_scope);
6237 error ("no %q#D member function declared in class %qT",
6245 if (DECL_CONSTRUCTOR_P (decl) && !grok_ctor_properties (ctype, decl))
6248 if (ctype == NULL_TREE || check)
6252 DECL_VIRTUAL_P (decl) = 1;
6257 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
6258 the linkage that DECL will receive in the object file. */
6261 set_linkage_for_static_data_member (tree decl)
6263 /* A static data member always has static storage duration and
6264 external linkage. Note that static data members are forbidden in
6265 local classes -- the only situation in which a class has
6266 non-external linkage. */
6267 TREE_PUBLIC (decl) = 1;
6268 TREE_STATIC (decl) = 1;
6269 /* For non-template classes, static data members are always put
6270 out in exactly those files where they are defined, just as
6271 with ordinary namespace-scope variables. */
6272 if (!processing_template_decl)
6273 DECL_INTERFACE_KNOWN (decl) = 1;
6276 /* Create a VAR_DECL named NAME with the indicated TYPE.
6278 If SCOPE is non-NULL, it is the class type or namespace containing
6279 the variable. If SCOPE is NULL, the variable should is created in
6280 the innermost enclosings scope. */
6283 grokvardecl (tree type,
6285 const cp_decl_specifier_seq *declspecs,
6291 tree explicit_scope;
6293 gcc_assert (!name || TREE_CODE (name) == IDENTIFIER_NODE);
6295 /* Compute the scope in which to place the variable, but remember
6296 whether or not that scope was explicitly specified by the user. */
6297 explicit_scope = scope;
6300 /* An explicit "extern" specifier indicates a namespace-scope
6302 if (declspecs->storage_class == sc_extern)
6303 scope = current_namespace;
6304 else if (!at_function_scope_p ())
6305 scope = current_scope ();
6309 && (/* If the variable is a namespace-scope variable declared in a
6310 template, we need DECL_LANG_SPECIFIC. */
6311 (TREE_CODE (scope) == NAMESPACE_DECL && processing_template_decl)
6312 /* Similarly for namespace-scope variables with language linkage
6314 || (TREE_CODE (scope) == NAMESPACE_DECL
6315 && current_lang_name != lang_name_cplusplus)
6316 /* Similarly for static data members. */
6318 decl = build_lang_decl (VAR_DECL, name, type);
6320 decl = build_decl (VAR_DECL, name, type);
6322 if (explicit_scope && TREE_CODE (explicit_scope) == NAMESPACE_DECL)
6323 set_decl_namespace (decl, explicit_scope, 0);
6325 DECL_CONTEXT (decl) = FROB_CONTEXT (scope);
6327 if (declspecs->storage_class == sc_extern)
6329 DECL_THIS_EXTERN (decl) = 1;
6330 DECL_EXTERNAL (decl) = !initialized;
6333 if (DECL_CLASS_SCOPE_P (decl))
6335 set_linkage_for_static_data_member (decl);
6336 /* This function is only called with out-of-class definitions. */
6337 DECL_EXTERNAL (decl) = 0;
6338 check_class_member_definition_namespace (decl);
6340 /* At top level, either `static' or no s.c. makes a definition
6341 (perhaps tentative), and absence of `static' makes it public. */
6342 else if (toplevel_bindings_p ())
6344 TREE_PUBLIC (decl) = (declspecs->storage_class != sc_static
6345 && (DECL_THIS_EXTERN (decl) || ! constp));
6346 TREE_STATIC (decl) = ! DECL_EXTERNAL (decl);
6348 /* Not at top level, only `static' makes a static definition. */
6351 TREE_STATIC (decl) = declspecs->storage_class == sc_static;
6352 TREE_PUBLIC (decl) = DECL_EXTERNAL (decl);
6355 if (declspecs->specs[(int)ds_thread])
6356 DECL_TLS_MODEL (decl) = decl_default_tls_model (decl);
6358 if (TREE_PUBLIC (decl))
6360 /* [basic.link]: A name with no linkage (notably, the name of a class
6361 or enumeration declared in a local scope) shall not be used to
6362 declare an entity with linkage.
6364 Only check this for public decls for now. */
6365 tree t = no_linkage_check (TREE_TYPE (decl), /*relaxed_p=*/false);
6368 if (TYPE_ANONYMOUS_P (t))
6370 if (DECL_EXTERN_C_P (decl))
6371 /* Allow this; it's pretty common in C. */
6375 /* DRs 132, 319 and 389 seem to indicate types with
6376 no linkage can only be used to declare extern "C"
6377 entities. Since it's not always an error in the
6378 ISO C++ 90 Standard, we only issue a warning. */
6379 warning (0, "non-local variable %q#D uses anonymous type",
6381 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
6382 warning (0, "%q+#D does not refer to the unqualified "
6383 "type, so it is not used for linkage",
6388 warning (0, "non-local variable %q#D uses local type %qT", decl, t);
6392 DECL_INTERFACE_KNOWN (decl) = 1;
6397 /* Create and return a canonical pointer to member function type, for
6398 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
6401 build_ptrmemfunc_type (tree type)
6405 tree unqualified_variant = NULL_TREE;
6407 if (type == error_mark_node)
6410 /* If a canonical type already exists for this type, use it. We use
6411 this method instead of type_hash_canon, because it only does a
6412 simple equality check on the list of field members. */
6414 if ((t = TYPE_GET_PTRMEMFUNC_TYPE (type)))
6417 /* Make sure that we always have the unqualified pointer-to-member
6419 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
6421 = build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type));
6423 t = make_aggr_type (RECORD_TYPE);
6424 xref_basetypes (t, NULL_TREE);
6426 /* Let the front end know this is a pointer to member function... */
6427 TYPE_PTRMEMFUNC_FLAG (t) = 1;
6428 /* ... and not really an aggregate. */
6429 SET_IS_AGGR_TYPE (t, 0);
6431 field = build_decl (FIELD_DECL, pfn_identifier, type);
6434 field = build_decl (FIELD_DECL, delta_identifier, delta_type_node);
6435 TREE_CHAIN (field) = fields;
6438 finish_builtin_struct (t, "__ptrmemfunc_type", fields, ptr_type_node);
6440 /* Zap out the name so that the back end will give us the debugging
6441 information for this anonymous RECORD_TYPE. */
6442 TYPE_NAME (t) = NULL_TREE;
6444 /* If this is not the unqualified form of this pointer-to-member
6445 type, set the TYPE_MAIN_VARIANT for this type to be the
6446 unqualified type. Since they are actually RECORD_TYPEs that are
6447 not variants of each other, we must do this manually. */
6448 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
6450 t = build_qualified_type (t, cp_type_quals (type));
6451 TYPE_MAIN_VARIANT (t) = unqualified_variant;
6452 TYPE_NEXT_VARIANT (t) = TYPE_NEXT_VARIANT (unqualified_variant);
6453 TYPE_NEXT_VARIANT (unqualified_variant) = t;
6456 /* Cache this pointer-to-member type so that we can find it again
6458 TYPE_SET_PTRMEMFUNC_TYPE (type, t);
6460 if (TYPE_STRUCTURAL_EQUALITY_P (type))
6461 SET_TYPE_STRUCTURAL_EQUALITY (t);
6462 else if (TYPE_CANONICAL (type) != type)
6463 TYPE_CANONICAL (t) = build_ptrmemfunc_type (TYPE_CANONICAL (type));
6468 /* Create and return a pointer to data member type. */
6471 build_ptrmem_type (tree class_type, tree member_type)
6473 if (TREE_CODE (member_type) == METHOD_TYPE)
6477 arg_types = TYPE_ARG_TYPES (member_type);
6478 class_type = (cp_build_qualified_type
6480 cp_type_quals (TREE_TYPE (TREE_VALUE (arg_types)))));
6482 = build_method_type_directly (class_type,
6483 TREE_TYPE (member_type),
6484 TREE_CHAIN (arg_types));
6485 return build_ptrmemfunc_type (build_pointer_type (member_type));
6489 gcc_assert (TREE_CODE (member_type) != FUNCTION_TYPE);
6490 return build_offset_type (class_type, member_type);
6494 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
6495 Check to see that the definition is valid. Issue appropriate error
6496 messages. Return 1 if the definition is particularly bad, or 0
6500 check_static_variable_definition (tree decl, tree type)
6502 /* Motion 10 at San Diego: If a static const integral data member is
6503 initialized with an integral constant expression, the initializer
6504 may appear either in the declaration (within the class), or in
6505 the definition, but not both. If it appears in the class, the
6506 member is a member constant. The file-scope definition is always
6508 if (!ARITHMETIC_TYPE_P (type) && TREE_CODE (type) != ENUMERAL_TYPE)
6510 error ("invalid in-class initialization of static data member "
6511 "of non-integral type %qT",
6513 /* If we just return the declaration, crashes will sometimes
6514 occur. We therefore return void_type_node, as if this were a
6515 friend declaration, to cause callers to completely ignore
6516 this declaration. */
6519 else if (!CP_TYPE_CONST_P (type))
6520 error ("ISO C++ forbids in-class initialization of non-const "
6521 "static member %qD",
6523 else if (pedantic && !INTEGRAL_TYPE_P (type))
6524 pedwarn ("ISO C++ forbids initialization of member constant "
6525 "%qD of non-integral type %qT", decl, type);
6530 /* Given the SIZE (i.e., number of elements) in an array, compute an
6531 appropriate index type for the array. If non-NULL, NAME is the
6532 name of the thing being declared. */
6535 compute_array_index_type (tree name, tree size)
6539 tree abi_1_itype = NULL_TREE;
6541 if (error_operand_p (size))
6542 return error_mark_node;
6544 type = TREE_TYPE (size);
6545 /* The array bound must be an integer type. */
6546 if (!dependent_type_p (type) && !INTEGRAL_TYPE_P (type))
6549 error ("size of array %qD has non-integral type %qT", name, type);
6551 error ("size of array has non-integral type %qT", type);
6552 size = integer_one_node;
6553 type = TREE_TYPE (size);
6556 if (value_dependent_expression_p (size))
6558 /* We cannot do any checking for a value-dependent SIZE. Just
6559 build the index type and mark that it requires structural
6561 itype = build_index_type (build_min (MINUS_EXPR, sizetype,
6562 size, integer_one_node));
6563 SET_TYPE_STRUCTURAL_EQUALITY (itype);
6567 if (!abi_version_at_least (2) && processing_template_decl)
6568 /* For abi-1, we handled all instances in templates the same way,
6569 even when they were non-dependent. This effects the manglings
6570 produced. So, we do the normal checking for non-dependent
6571 sizes, but at the end we'll return the same type that abi-1
6572 would have, but with TYPE_CANONICAL set to the "right"
6573 value that the current ABI would provide. */
6574 abi_1_itype = build_index_type (build_min (MINUS_EXPR, sizetype,
6575 size, integer_one_node));
6577 /* The size might be the result of a cast. */
6578 STRIP_TYPE_NOPS (size);
6580 /* It might be a const variable or enumeration constant. */
6581 size = integral_constant_value (size);
6583 /* Normally, the array-bound will be a constant. */
6584 if (TREE_CODE (size) == INTEGER_CST)
6586 /* Check to see if the array bound overflowed. Make that an
6587 error, no matter how generous we're being. */
6588 int old_flag_pedantic_errors = flag_pedantic_errors;
6589 int old_pedantic = pedantic;
6590 pedantic = flag_pedantic_errors = 1;
6591 constant_expression_warning (size);
6592 pedantic = old_pedantic;
6593 flag_pedantic_errors = old_flag_pedantic_errors;
6595 /* An array must have a positive number of elements. */
6596 if (INT_CST_LT (size, integer_zero_node))
6599 error ("size of array %qD is negative", name);
6601 error ("size of array is negative");
6602 size = integer_one_node;
6604 /* As an extension we allow zero-sized arrays. We always allow
6605 them in system headers because glibc uses them. */
6606 else if (integer_zerop (size) && pedantic && !in_system_header)
6609 pedwarn ("ISO C++ forbids zero-size array %qD", name);
6611 pedwarn ("ISO C++ forbids zero-size array");
6614 else if (TREE_CONSTANT (size))
6616 /* `(int) &fn' is not a valid array bound. */
6618 error ("size of array %qD is not an integral constant-expression",
6621 error ("size of array is not an integral constant-expression");
6622 size = integer_one_node;
6624 else if (pedantic && warn_vla != 0)
6627 pedwarn ("ISO C++ forbids variable length array %qD", name);
6629 pedwarn ("ISO C++ forbids variable length array");
6631 else if (warn_vla > 0)
6635 "variable length array %qD is used", name);
6638 "variable length array is used");
6641 if (processing_template_decl && !TREE_CONSTANT (size))
6642 /* A variable sized array. */
6643 itype = build_min (MINUS_EXPR, sizetype, size, integer_one_node);
6646 HOST_WIDE_INT saved_processing_template_decl;
6648 /* Compute the index of the largest element in the array. It is
6649 one less than the number of elements in the array. We save
6650 and restore PROCESSING_TEMPLATE_DECL so that computations in
6651 cp_build_binary_op will be appropriately folded. */
6652 saved_processing_template_decl = processing_template_decl;
6653 processing_template_decl = 0;
6654 itype = cp_build_binary_op (MINUS_EXPR,
6655 cp_convert (ssizetype, size),
6656 cp_convert (ssizetype, integer_one_node));
6657 itype = fold (itype);
6658 processing_template_decl = saved_processing_template_decl;
6660 if (!TREE_CONSTANT (itype))
6661 /* A variable sized array. */
6662 itype = variable_size (itype);
6663 /* Make sure that there was no overflow when creating to a signed
6664 index type. (For example, on a 32-bit machine, an array with
6665 size 2^32 - 1 is too big.) */
6666 else if (TREE_CODE (itype) == INTEGER_CST
6667 && TREE_OVERFLOW (itype))
6669 error ("overflow in array dimension");
6670 TREE_OVERFLOW (itype) = 0;
6674 /* Create and return the appropriate index type. */
6677 tree t = build_index_type (itype);
6678 TYPE_CANONICAL (abi_1_itype) = TYPE_CANONICAL (t);
6682 return build_index_type (itype);
6685 /* Returns the scope (if any) in which the entity declared by
6686 DECLARATOR will be located. If the entity was declared with an
6687 unqualified name, NULL_TREE is returned. */
6690 get_scope_of_declarator (const cp_declarator *declarator)
6692 while (declarator && declarator->kind != cdk_id)
6693 declarator = declarator->declarator;
6695 /* If the declarator-id is a SCOPE_REF, the scope in which the
6696 declaration occurs is the first operand. */
6698 && declarator->u.id.qualifying_scope)
6699 return declarator->u.id.qualifying_scope;
6701 /* Otherwise, the declarator is not a qualified name; the entity will
6702 be declared in the current scope. */
6706 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
6707 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
6711 create_array_type_for_decl (tree name, tree type, tree size)
6713 tree itype = NULL_TREE;
6714 const char* error_msg;
6716 /* If things have already gone awry, bail now. */
6717 if (type == error_mark_node || size == error_mark_node)
6718 return error_mark_node;
6720 /* Assume that everything will go OK. */
6723 /* There are some types which cannot be array elements. */
6724 switch (TREE_CODE (type))
6727 error_msg = "array of void";
6731 error_msg = "array of functions";
6734 case REFERENCE_TYPE:
6735 error_msg = "array of references";
6739 error_msg = "array of function members";
6746 /* If something went wrong, issue an error-message and return. */
6750 error ("declaration of %qD as %s", name, error_msg);
6752 error ("creating %s", error_msg);
6754 return error_mark_node;
6759 The constant expressions that specify the bounds of the arrays
6760 can be omitted only for the first member of the sequence. */
6761 if (TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type))
6764 error ("declaration of %qD as multidimensional array must "
6765 "have bounds for all dimensions except the first",
6768 error ("multidimensional array must have bounds for all "
6769 "dimensions except the first");
6771 return error_mark_node;
6774 /* Figure out the index type for the array. */
6776 itype = compute_array_index_type (name, size);
6779 T is called the array element type; this type shall not be [...] an
6780 abstract class type. */
6781 abstract_virtuals_error (name, type);
6783 return build_cplus_array_type (type, itype);
6786 /* Check that it's OK to declare a function with the indicated TYPE.
6787 SFK indicates the kind of special function (if any) that this
6788 function is. OPTYPE is the type given in a conversion operator
6789 declaration, or the class type for a constructor/destructor.
6790 Returns the actual return type of the function; that
6791 may be different than TYPE if an error occurs, or for certain
6792 special functions. */
6795 check_special_function_return_type (special_function_kind sfk,
6801 case sfk_constructor:
6803 error ("return type specification for constructor invalid");
6805 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
6806 type = build_pointer_type (optype);
6808 type = void_type_node;
6811 case sfk_destructor:
6813 error ("return type specification for destructor invalid");
6814 /* We can't use the proper return type here because we run into
6815 problems with ambiguous bases and covariant returns.
6816 Java classes are left unchanged because (void *) isn't a valid
6817 Java type, and we don't want to change the Java ABI. */
6818 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
6819 type = build_pointer_type (void_type_node);
6821 type = void_type_node;
6824 case sfk_conversion:
6825 if (type && !same_type_p (type, optype))
6826 error ("operator %qT declared to return %qT", optype, type);
6828 pedwarn ("return type specified for %<operator %T%>", optype);
6839 /* A variable or data member (whose unqualified name is IDENTIFIER)
6840 has been declared with the indicated TYPE. If the TYPE is not
6841 acceptable, issue an error message and return a type to use for
6842 error-recovery purposes. */
6845 check_var_type (tree identifier, tree type)
6847 if (VOID_TYPE_P (type))
6850 error ("unnamed variable or field declared void");
6851 else if (TREE_CODE (identifier) == IDENTIFIER_NODE)
6853 gcc_assert (!IDENTIFIER_OPNAME_P (identifier));
6854 error ("variable or field %qE declared void", identifier);
6857 error ("variable or field declared void");
6858 type = error_mark_node;
6864 /* Given declspecs and a declarator (abstract or otherwise), determine
6865 the name and type of the object declared and construct a DECL node
6868 DECLSPECS points to the representation of declaration-specifier
6869 sequence that precedes declarator.
6871 DECL_CONTEXT says which syntactic context this declaration is in:
6872 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
6873 FUNCDEF for a function definition. Like NORMAL but a few different
6874 error messages in each case. Return value may be zero meaning
6875 this definition is too screwy to try to parse.
6876 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
6877 handle member functions (which have FIELD context).
6878 Return value may be zero meaning this definition is too screwy to
6880 PARM for a parameter declaration (either within a function prototype
6881 or before a function body). Make a PARM_DECL, or return void_type_node.
6882 CATCHPARM for a parameter declaration before a catch clause.
6883 TYPENAME if for a typename (in a cast or sizeof).
6884 Don't make a DECL node; just return the ..._TYPE node.
6885 FIELD for a struct or union field; make a FIELD_DECL.
6886 BITFIELD for a field with specified width.
6887 INITIALIZED is 1 if the decl has an initializer.
6889 ATTRLIST is a pointer to the list of attributes, which may be NULL
6890 if there are none; *ATTRLIST may be modified if attributes from inside
6891 the declarator should be applied to the declaration.
6893 When this function is called, scoping variables (such as
6894 CURRENT_CLASS_TYPE) should reflect the scope in which the
6895 declaration occurs, not the scope in which the new declaration will
6896 be placed. For example, on:
6900 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
6903 Returns a DECL (if a declarator is present), a TYPE (if there is no
6904 declarator, in cases like "struct S;"), or the ERROR_MARK_NODE if an
6908 grokdeclarator (const cp_declarator *declarator,
6909 const cp_decl_specifier_seq *declspecs,
6910 enum decl_context decl_context,
6914 tree type = NULL_TREE;
6916 int virtualp, explicitp, friendp, inlinep, staticp;
6917 int explicit_int = 0;
6918 int explicit_char = 0;
6919 int defaulted_int = 0;
6920 tree dependent_name = NULL_TREE;
6922 tree typedef_decl = NULL_TREE;
6923 const char *name = NULL;
6924 tree typedef_type = NULL_TREE;
6925 /* True if this declarator is a function definition. */
6926 bool funcdef_flag = false;
6927 cp_declarator_kind innermost_code = cdk_error;
6930 /* See the code below that used this. */
6931 tree decl_attr = NULL_TREE;
6934 /* Keep track of what sort of function is being processed
6935 so that we can warn about default return values, or explicit
6936 return values which do not match prescribed defaults. */
6937 special_function_kind sfk = sfk_none;
6939 tree dname = NULL_TREE;
6940 tree ctor_return_type = NULL_TREE;
6941 enum overload_flags flags = NO_SPECIAL;
6942 /* cv-qualifiers that apply to the declarator, for a declaration of
6943 a member function. */
6944 cp_cv_quals memfn_quals = TYPE_UNQUALIFIED;
6945 /* cv-qualifiers that apply to the type specified by the DECLSPECS. */
6947 tree raises = NULL_TREE;
6948 int template_count = 0;
6949 tree returned_attrs = NULL_TREE;
6950 tree parms = NULL_TREE;
6951 const cp_declarator *id_declarator;
6952 /* The unqualified name of the declarator; either an
6953 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
6954 tree unqualified_id;
6955 /* The class type, if any, in which this entity is located,
6956 or NULL_TREE if none. Note that this value may be different from
6957 the current class type; for example if an attempt is made to declare
6958 "A::f" inside "B", this value will be "A". */
6959 tree ctype = current_class_type;
6960 /* The NAMESPACE_DECL for the namespace in which this entity is
6961 located. If an unqualified name is used to declare the entity,
6962 this value will be NULL_TREE, even if the entity is located at
6964 tree in_namespace = NULL_TREE;
6965 cp_storage_class storage_class;
6966 bool unsigned_p, signed_p, short_p, long_p, thread_p;
6967 bool type_was_error_mark_node = false;
6968 bool parameter_pack_p = declarator? declarator->parameter_pack_p : false;
6969 bool set_no_warning = false;
6971 signed_p = declspecs->specs[(int)ds_signed];
6972 unsigned_p = declspecs->specs[(int)ds_unsigned];
6973 short_p = declspecs->specs[(int)ds_short];
6974 long_p = declspecs->specs[(int)ds_long];
6975 longlong = declspecs->specs[(int)ds_long] >= 2;
6976 thread_p = declspecs->specs[(int)ds_thread];
6978 if (decl_context == FUNCDEF)
6979 funcdef_flag = true, decl_context = NORMAL;
6980 else if (decl_context == MEMFUNCDEF)
6981 funcdef_flag = true, decl_context = FIELD;
6982 else if (decl_context == BITFIELD)
6983 bitfield = 1, decl_context = FIELD;
6985 /* Look inside a declarator for the name being declared
6986 and get it as a string, for an error message. */
6987 for (id_declarator = declarator;
6989 id_declarator = id_declarator->declarator)
6991 if (id_declarator->kind != cdk_id)
6992 innermost_code = id_declarator->kind;
6994 switch (id_declarator->kind)
6997 if (id_declarator->declarator
6998 && id_declarator->declarator->kind == cdk_id)
7000 sfk = id_declarator->declarator->u.id.sfk;
7001 if (sfk == sfk_destructor)
7008 tree qualifying_scope = id_declarator->u.id.qualifying_scope;
7009 tree decl = id_declarator->u.id.unqualified_name;
7012 if (qualifying_scope)
7014 if (at_function_scope_p ())
7018 A declarator-id shall not be qualified except
7021 None of the cases are permitted in block
7023 if (qualifying_scope == global_namespace)
7024 error ("invalid use of qualified-name %<::%D%>",
7026 else if (TYPE_P (qualifying_scope))
7027 error ("invalid use of qualified-name %<%T::%D%>",
7028 qualifying_scope, decl);
7030 error ("invalid use of qualified-name %<%D::%D%>",
7031 qualifying_scope, decl);
7032 return error_mark_node;
7034 else if (TYPE_P (qualifying_scope))
7036 ctype = qualifying_scope;
7037 if (innermost_code != cdk_function
7038 && current_class_type
7039 && !UNIQUELY_DERIVED_FROM_P (ctype,
7040 current_class_type))
7042 error ("type %qT is not derived from type %qT",
7043 ctype, current_class_type);
7044 return error_mark_node;
7047 else if (TREE_CODE (qualifying_scope) == NAMESPACE_DECL)
7048 in_namespace = qualifying_scope;
7050 switch (TREE_CODE (decl))
7056 if (innermost_code != cdk_function)
7058 error ("declaration of %qD as non-function", decl);
7059 return error_mark_node;
7061 else if (!qualifying_scope
7062 && !(current_class_type && at_class_scope_p ()))
7064 error ("declaration of %qD as non-member", decl);
7065 return error_mark_node;
7068 type = TREE_OPERAND (decl, 0);
7069 name = IDENTIFIER_POINTER (constructor_name (type));
7074 case TEMPLATE_ID_EXPR:
7076 tree fns = TREE_OPERAND (decl, 0);
7079 if (TREE_CODE (dname) != IDENTIFIER_NODE)
7081 gcc_assert (is_overloaded_fn (dname));
7082 dname = DECL_NAME (get_first_fn (dname));
7087 case IDENTIFIER_NODE:
7088 if (TREE_CODE (decl) == IDENTIFIER_NODE)
7091 if (C_IS_RESERVED_WORD (dname))
7093 error ("declarator-id missing; using reserved word %qD",
7095 name = IDENTIFIER_POINTER (dname);
7097 else if (!IDENTIFIER_TYPENAME_P (dname))
7098 name = IDENTIFIER_POINTER (dname);
7101 gcc_assert (flags == NO_SPECIAL);
7102 flags = TYPENAME_FLAG;
7103 ctor_return_type = TREE_TYPE (dname);
7104 sfk = sfk_conversion;
7105 if (is_typename_at_global_scope (dname))
7106 name = IDENTIFIER_POINTER (dname);
7108 name = "<invalid operator>";
7124 return error_mark_node;
7130 if (id_declarator->kind == cdk_id)
7136 The declarator in a function-definition shall have the form
7137 D1 ( parameter-declaration-clause) ... */
7138 if (funcdef_flag && innermost_code != cdk_function)
7140 error ("function definition does not declare parameters");
7141 return error_mark_node;
7144 if (((dname && IDENTIFIER_OPNAME_P (dname)) || flags == TYPENAME_FLAG)
7145 && innermost_code != cdk_function
7146 && ! (ctype && !declspecs->any_specifiers_p))
7148 error ("declaration of %qD as non-function", dname);
7149 return error_mark_node;
7152 /* Anything declared one level down from the top level
7153 must be one of the parameters of a function
7154 (because the body is at least two levels down). */
7156 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
7157 by not allowing C++ class definitions to specify their parameters
7158 with xdecls (must be spec.d in the parmlist).
7160 Since we now wait to push a class scope until we are sure that
7161 we are in a legitimate method context, we must set oldcname
7162 explicitly (since current_class_name is not yet alive).
7164 We also want to avoid calling this a PARM if it is in a namespace. */
7166 if (decl_context == NORMAL && !toplevel_bindings_p ())
7168 struct cp_binding_level *b = current_binding_level;
7169 current_binding_level = b->level_chain;
7170 if (current_binding_level != 0 && toplevel_bindings_p ())
7171 decl_context = PARM;
7172 current_binding_level = b;
7176 name = decl_context == PARM ? "parameter" : "type name";
7178 /* If there were multiple types specified in the decl-specifier-seq,
7179 issue an error message. */
7180 if (declspecs->multiple_types_p)
7182 error ("two or more data types in declaration of %qs", name);
7183 return error_mark_node;
7186 /* Extract the basic type from the decl-specifier-seq. */
7187 type = declspecs->type;
7188 if (type == error_mark_node)
7191 type_was_error_mark_node = true;
7193 /* If the entire declaration is itself tagged as deprecated then
7194 suppress reports of deprecated items. */
7195 if (type && TREE_DEPRECATED (type)
7196 && deprecated_state != DEPRECATED_SUPPRESS)
7197 warn_deprecated_use (type);
7198 if (type && TREE_CODE (type) == TYPE_DECL)
7200 typedef_decl = type;
7201 type = TREE_TYPE (typedef_decl);
7203 /* No type at all: default to `int', and set DEFAULTED_INT
7204 because it was not a user-defined typedef. */
7205 if (type == NULL_TREE && (signed_p || unsigned_p || long_p || short_p))
7207 /* These imply 'int'. */
7208 type = integer_type_node;
7212 explicit_int = declspecs->explicit_int_p;
7213 explicit_char = declspecs->explicit_char_p;
7216 /* See the code below that used this. */
7218 decl_attr = DECL_ATTRIBUTES (typedef_decl);
7220 typedef_type = type;
7223 if (sfk != sfk_conversion)
7224 ctor_return_type = ctype;
7226 if (sfk != sfk_none)
7227 type = check_special_function_return_type (sfk, type,
7229 else if (type == NULL_TREE)
7235 /* We handle `main' specially here, because 'main () { }' is so
7236 common. With no options, it is allowed. With -Wreturn-type,
7237 it is a warning. It is only an error with -pedantic-errors. */
7238 is_main = (funcdef_flag
7239 && dname && MAIN_NAME_P (dname)
7240 && ctype == NULL_TREE
7241 && in_namespace == NULL_TREE
7242 && current_namespace == global_namespace);
7244 if (type_was_error_mark_node)
7245 /* We've already issued an error, don't complain more. */;
7246 else if (in_system_header || flag_ms_extensions)
7247 /* Allow it, sigh. */;
7248 else if (pedantic || ! is_main)
7249 pedwarn ("ISO C++ forbids declaration of %qs with no type", name);
7251 warning (OPT_Wreturn_type,
7252 "ISO C++ forbids declaration of %qs with no type", name);
7254 type = integer_type_node;
7259 /* Now process the modifiers that were specified
7260 and check for invalid combinations. */
7262 /* Long double is a special combination. */
7263 if (long_p && !longlong && TYPE_MAIN_VARIANT (type) == double_type_node)
7266 type = build_qualified_type (long_double_type_node,
7267 cp_type_quals (type));
7270 /* Check all other uses of type modifiers. */
7272 if (unsigned_p || signed_p || long_p || short_p)
7276 if ((signed_p || unsigned_p) && TREE_CODE (type) != INTEGER_TYPE)
7277 error ("%<signed%> or %<unsigned%> invalid for %qs", name);
7278 else if (signed_p && unsigned_p)
7279 error ("%<signed%> and %<unsigned%> specified together for %qs", name);
7280 else if (longlong && TREE_CODE (type) != INTEGER_TYPE)
7281 error ("%<long long%> invalid for %qs", name);
7282 else if (long_p && TREE_CODE (type) == REAL_TYPE)
7283 error ("%<long%> invalid for %qs", name);
7284 else if (short_p && TREE_CODE (type) == REAL_TYPE)
7285 error ("%<short%> invalid for %qs", name);
7286 else if ((long_p || short_p) && TREE_CODE (type) != INTEGER_TYPE)
7287 error ("%<long%> or %<short%> invalid for %qs", name);
7288 else if ((long_p || short_p) && explicit_char)
7289 error ("%<long%> or %<short%> specified with char for %qs", name);
7290 else if (long_p && short_p)
7291 error ("%<long%> and %<short%> specified together for %qs", name);
7295 if (!explicit_int && !defaulted_int && !explicit_char && pedantic)
7297 pedwarn ("long, short, signed or unsigned used invalidly for %qs",
7299 if (flag_pedantic_errors)
7304 /* Discard the type modifiers if they are invalid. */
7315 /* Decide whether an integer type is signed or not.
7316 Optionally treat bitfields as signed by default. */
7320 It is implementation-defined whether a plain (neither
7321 explicitly signed or unsigned) char, short, int, or long
7322 bit-field is signed or unsigned.
7324 Naturally, we extend this to long long as well. Note that
7325 this does not include wchar_t. */
7326 || (bitfield && !flag_signed_bitfields
7328 /* A typedef for plain `int' without `signed' can be
7329 controlled just like plain `int', but a typedef for
7330 `signed int' cannot be so controlled. */
7332 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl))
7333 && TREE_CODE (type) == INTEGER_TYPE
7334 && !same_type_p (TYPE_MAIN_VARIANT (type), wchar_type_node)))
7337 type = long_long_unsigned_type_node;
7339 type = long_unsigned_type_node;
7341 type = short_unsigned_type_node;
7342 else if (type == char_type_node)
7343 type = unsigned_char_type_node;
7344 else if (typedef_decl)
7345 type = c_common_unsigned_type (type);
7347 type = unsigned_type_node;
7349 else if (signed_p && type == char_type_node)
7350 type = signed_char_type_node;
7352 type = long_long_integer_type_node;
7354 type = long_integer_type_node;
7356 type = short_integer_type_node;
7358 if (declspecs->specs[(int)ds_complex])
7360 if (TREE_CODE (type) != INTEGER_TYPE && TREE_CODE (type) != REAL_TYPE)
7361 error ("complex invalid for %qs", name);
7362 /* If we just have "complex", it is equivalent to
7363 "complex double", but if any modifiers at all are specified it is
7364 the complex form of TYPE. E.g, "complex short" is
7365 "complex short int". */
7367 else if (defaulted_int && ! longlong
7368 && ! (long_p || short_p || signed_p || unsigned_p))
7369 type = complex_double_type_node;
7370 else if (type == integer_type_node)
7371 type = complex_integer_type_node;
7372 else if (type == float_type_node)
7373 type = complex_float_type_node;
7374 else if (type == double_type_node)
7375 type = complex_double_type_node;
7376 else if (type == long_double_type_node)
7377 type = complex_long_double_type_node;
7379 type = build_complex_type (type);
7382 type_quals = TYPE_UNQUALIFIED;
7383 if (declspecs->specs[(int)ds_const])
7384 type_quals |= TYPE_QUAL_CONST;
7385 if (declspecs->specs[(int)ds_volatile])
7386 type_quals |= TYPE_QUAL_VOLATILE;
7387 if (declspecs->specs[(int)ds_restrict])
7388 type_quals |= TYPE_QUAL_RESTRICT;
7389 if (sfk == sfk_conversion && type_quals != TYPE_UNQUALIFIED)
7390 error ("qualifiers are not allowed on declaration of %<operator %T%>",
7393 if (TREE_CODE (type) == FUNCTION_TYPE
7394 && type_quals != TYPE_UNQUALIFIED)
7396 /* This was an error in C++98 (cv-qualifiers cannot be added to
7397 a function type), but DR 295 makes the code well-formed by
7398 dropping the extra qualifiers. */
7401 tree bad_type = build_qualified_type (type, type_quals);
7402 pedwarn ("ignoring %qV qualifiers added to function type %qT",
7405 type_quals = TYPE_UNQUALIFIED;
7407 type_quals |= cp_type_quals (type);
7408 type = cp_build_qualified_type_real
7409 (type, type_quals, ((typedef_decl && !DECL_ARTIFICIAL (typedef_decl)
7410 ? tf_ignore_bad_quals : 0) | tf_warning_or_error));
7411 /* We might have ignored or rejected some of the qualifiers. */
7412 type_quals = cp_type_quals (type);
7415 inlinep = !! declspecs->specs[(int)ds_inline];
7416 virtualp = !! declspecs->specs[(int)ds_virtual];
7417 explicitp = !! declspecs->specs[(int)ds_explicit];
7419 storage_class = declspecs->storage_class;
7420 if (storage_class == sc_static)
7421 staticp = 1 + (decl_context == FIELD);
7423 if (virtualp && staticp == 2)
7425 error ("member %qD cannot be declared both virtual and static", dname);
7426 storage_class = sc_none;
7429 friendp = !! declspecs->specs[(int)ds_friend];
7431 if (dependent_name && !friendp)
7433 error ("%<%T::%D%> is not a valid declarator", ctype, dependent_name);
7434 return error_mark_node;
7437 /* Issue errors about use of storage classes for parameters. */
7438 if (decl_context == PARM)
7440 if (declspecs->specs[(int)ds_typedef])
7442 error ("typedef declaration invalid in parameter declaration");
7443 return error_mark_node;
7445 else if (storage_class == sc_static
7446 || storage_class == sc_extern
7448 error ("storage class specifiers invalid in parameter declarations");
7451 /* Give error if `virtual' is used outside of class declaration. */
7453 && (current_class_name == NULL_TREE || decl_context != FIELD))
7455 error ("virtual outside class declaration");
7459 /* Static anonymous unions are dealt with here. */
7460 if (staticp && decl_context == TYPENAME
7462 && ANON_AGGR_TYPE_P (declspecs->type))
7463 decl_context = FIELD;
7465 /* Warn about storage classes that are invalid for certain
7466 kinds of declarations (parameters, typenames, etc.). */
7469 && storage_class != sc_extern
7470 && storage_class != sc_static)
7471 || declspecs->specs[(int)ds_typedef]))
7473 error ("multiple storage classes in declaration of %qs", name);
7476 if (declspecs->conflicting_specifiers_p)
7478 error ("conflicting specifiers in declaration of %qs", name);
7479 storage_class = sc_none;
7481 else if (decl_context != NORMAL
7482 && ((storage_class != sc_none
7483 && storage_class != sc_mutable)
7486 if ((decl_context == PARM || decl_context == CATCHPARM)
7487 && (storage_class == sc_register
7488 || storage_class == sc_auto))
7490 else if (declspecs->specs[(int)ds_typedef])
7492 else if (decl_context == FIELD
7493 /* C++ allows static class elements. */
7494 && storage_class == sc_static)
7495 /* C++ also allows inlines and signed and unsigned elements,
7496 but in those cases we don't come in here. */
7500 if (decl_context == FIELD)
7501 error ("storage class specified for %qs", name);
7504 if (decl_context == PARM || decl_context == CATCHPARM)
7505 error ("storage class specified for parameter %qs", name);
7507 error ("storage class specified for typename");
7509 if (storage_class == sc_register
7510 || storage_class == sc_auto
7511 || storage_class == sc_extern
7513 storage_class = sc_none;
7516 else if (storage_class == sc_extern && initialized
7519 if (toplevel_bindings_p ())
7521 /* It's common practice (and completely valid) to have a const
7522 be initialized and declared extern. */
7523 if (!(type_quals & TYPE_QUAL_CONST))
7524 warning (0, "%qs initialized and declared %<extern%>", name);
7527 error ("%qs has both %<extern%> and initializer", name);
7529 else if (storage_class == sc_extern && funcdef_flag
7530 && ! toplevel_bindings_p ())
7531 error ("nested function %qs declared %<extern%>", name);
7532 else if (toplevel_bindings_p ())
7534 if (storage_class == sc_auto)
7535 error ("top-level declaration of %qs specifies %<auto%>", name);
7538 && storage_class != sc_extern
7539 && storage_class != sc_static)
7541 error ("function-scope %qs implicitly auto and declared %<__thread%>",
7546 if (storage_class && friendp)
7547 error ("storage class specifiers invalid in friend function declarations");
7550 unqualified_id = NULL_TREE;
7553 unqualified_id = id_declarator->u.id.unqualified_name;
7554 switch (TREE_CODE (unqualified_id))
7558 = constructor_name (TREE_OPERAND (unqualified_id, 0));
7561 case IDENTIFIER_NODE:
7562 case TEMPLATE_ID_EXPR:
7570 /* Determine the type of the entity declared by recurring on the
7572 for (; declarator; declarator = declarator->declarator)
7574 const cp_declarator *inner_declarator;
7577 if (type == error_mark_node)
7578 return error_mark_node;
7580 attrs = declarator->attributes;
7586 if (declarator == NULL || declarator->kind == cdk_id)
7587 attr_flags |= (int) ATTR_FLAG_DECL_NEXT;
7588 if (declarator->kind == cdk_function)
7589 attr_flags |= (int) ATTR_FLAG_FUNCTION_NEXT;
7590 if (declarator->kind == cdk_array)
7591 attr_flags |= (int) ATTR_FLAG_ARRAY_NEXT;
7592 returned_attrs = decl_attributes (&type,
7593 chainon (returned_attrs, attrs),
7597 if (declarator->kind == cdk_id)
7600 inner_declarator = declarator->declarator;
7602 switch (declarator->kind)
7605 type = create_array_type_for_decl (dname, type,
7606 declarator->u.array.bounds);
7614 /* Declaring a function type.
7615 Make sure we have a valid type for the function to return. */
7617 if (type_quals != TYPE_UNQUALIFIED)
7619 if (SCALAR_TYPE_P (type) || VOID_TYPE_P (type))
7620 warning (OPT_Wreturn_type,
7621 "type qualifiers ignored on function return type");
7622 /* We now know that the TYPE_QUALS don't apply to the
7623 decl, but to its return type. */
7624 type_quals = TYPE_UNQUALIFIED;
7625 set_no_warning = true;
7628 /* Warn about some types functions can't return. */
7630 if (TREE_CODE (type) == FUNCTION_TYPE)
7632 error ("%qs declared as function returning a function", name);
7633 type = integer_type_node;
7635 if (TREE_CODE (type) == ARRAY_TYPE)
7637 error ("%qs declared as function returning an array", name);
7638 type = integer_type_node;
7641 /* Pick up type qualifiers which should be applied to `this'. */
7642 memfn_quals = declarator->u.function.qualifiers;
7644 /* Pick up the exception specifications. */
7645 raises = declarator->u.function.exception_specification;
7647 /* Say it's a definition only for the CALL_EXPR
7648 closest to the identifier. */
7649 funcdecl_p = inner_declarator && inner_declarator->kind == cdk_id;
7651 if (ctype == NULL_TREE
7652 && decl_context == FIELD
7654 && (friendp == 0 || dname == current_class_name))
7655 ctype = current_class_type;
7657 if (ctype && (sfk == sfk_constructor
7658 || sfk == sfk_destructor))
7660 /* We are within a class's scope. If our declarator name
7661 is the same as the class name, and we are defining
7662 a function, then it is a constructor/destructor, and
7663 therefore returns a void type. */
7665 /* ISO C++ 12.4/2. A destructor may not be declared
7666 const or volatile. A destructor may not be
7669 ISO C++ 12.1. A constructor may not be declared
7670 const or volatile. A constructor may not be
7671 virtual. A constructor may not be static. */
7673 error ((flags == DTOR_FLAG)
7674 ? "destructor cannot be static member function"
7675 : "constructor cannot be static member function");
7678 error ((flags == DTOR_FLAG)
7679 ? "destructors may not be cv-qualified"
7680 : "constructors may not be cv-qualified");
7681 memfn_quals = TYPE_UNQUALIFIED;
7684 if (decl_context == FIELD
7685 && !member_function_or_else (ctype,
7688 return error_mark_node;
7690 if (flags != DTOR_FLAG)
7692 /* It's a constructor. */
7697 pedwarn ("constructors cannot be declared virtual");
7700 if (decl_context == FIELD
7701 && sfk != sfk_constructor)
7702 return error_mark_node;
7704 if (decl_context == FIELD)
7710 error ("can't initialize friend function %qs", name);
7713 /* Cannot be both friend and virtual. */
7714 error ("virtual functions cannot be friends");
7717 if (decl_context == NORMAL)
7718 error ("friend declaration not in class definition");
7719 if (current_function_decl && funcdef_flag)
7720 error ("can't define friend function %qs in a local "
7725 arg_types = grokparms (declarator->u.function.parameters,
7728 if (inner_declarator
7729 && inner_declarator->kind == cdk_id
7730 && inner_declarator->u.id.sfk == sfk_destructor
7731 && arg_types != void_list_node)
7733 error ("destructors may not have parameters");
7734 arg_types = void_list_node;
7738 type = build_function_type (type, arg_types);
7745 /* Filter out pointers-to-references and references-to-references.
7746 We can get these if a TYPE_DECL is used. */
7748 if (TREE_CODE (type) == REFERENCE_TYPE)
7750 error (declarator->kind == cdk_reference
7751 ? "cannot declare reference to %q#T"
7752 : "cannot declare pointer to %q#T", type);
7753 type = TREE_TYPE (type);
7755 else if (VOID_TYPE_P (type))
7757 if (declarator->kind == cdk_reference)
7758 error ("cannot declare reference to %q#T", type);
7759 else if (declarator->kind == cdk_ptrmem)
7760 error ("cannot declare pointer to %q#T member", type);
7763 /* We now know that the TYPE_QUALS don't apply to the decl,
7764 but to the target of the pointer. */
7765 type_quals = TYPE_UNQUALIFIED;
7767 if (declarator->kind == cdk_ptrmem
7768 && (TREE_CODE (type) == FUNCTION_TYPE || memfn_quals))
7770 memfn_quals |= cp_type_quals (type);
7771 type = build_memfn_type (type,
7772 declarator->u.pointer.class_type,
7774 memfn_quals = TYPE_UNQUALIFIED;
7777 if (declarator->kind == cdk_reference)
7779 if (!VOID_TYPE_P (type))
7780 type = build_reference_type (type);
7782 else if (TREE_CODE (type) == METHOD_TYPE)
7783 type = build_ptrmemfunc_type (build_pointer_type (type));
7784 else if (declarator->kind == cdk_ptrmem)
7786 gcc_assert (TREE_CODE (declarator->u.pointer.class_type)
7788 if (declarator->u.pointer.class_type == error_mark_node)
7789 /* We will already have complained. */
7790 type = error_mark_node;
7792 type = build_ptrmem_type (declarator->u.pointer.class_type,
7796 type = build_pointer_type (type);
7798 /* Process a list of type modifier keywords (such as
7799 const or volatile) that were given inside the `*' or `&'. */
7801 if (declarator->u.pointer.qualifiers)
7804 = cp_build_qualified_type (type,
7805 declarator->u.pointer.qualifiers);
7806 type_quals = cp_type_quals (type);
7819 if (unqualified_id && TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR
7820 && TREE_CODE (type) != FUNCTION_TYPE
7821 && TREE_CODE (type) != METHOD_TYPE)
7823 error ("template-id %qD used as a declarator",
7825 unqualified_id = dname;
7828 /* If TYPE is a FUNCTION_TYPE, but the function name was explicitly
7829 qualified with a class-name, turn it into a METHOD_TYPE, unless
7830 we know that the function is static. We take advantage of this
7831 opportunity to do other processing that pertains to entities
7832 explicitly declared to be class members. Note that if DECLARATOR
7833 is non-NULL, we know it is a cdk_id declarator; otherwise, we
7834 would not have exited the loop above. */
7836 && declarator->u.id.qualifying_scope
7837 && TYPE_P (declarator->u.id.qualifying_scope))
7841 ctype = declarator->u.id.qualifying_scope;
7842 ctype = TYPE_MAIN_VARIANT (ctype);
7844 while (t != NULL_TREE && CLASS_TYPE_P (t))
7846 /* You're supposed to have one `template <...>' for every
7847 template class, but you don't need one for a full
7848 specialization. For example:
7850 template <class T> struct S{};
7851 template <> struct S<int> { void f(); };
7852 void S<int>::f () {}
7854 is correct; there shouldn't be a `template <>' for the
7855 definition of `S<int>::f'. */
7856 if (CLASSTYPE_TEMPLATE_SPECIALIZATION (t)
7857 && !any_dependent_template_arguments_p (CLASSTYPE_TI_ARGS (t)))
7858 /* T is an explicit (not partial) specialization. All
7859 containing classes must therefore also be explicitly
7862 if ((CLASSTYPE_USE_TEMPLATE (t) || CLASSTYPE_IS_TEMPLATE (t))
7863 && PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (t)))
7864 template_count += 1;
7866 t = TYPE_MAIN_DECL (t);
7867 t = DECL_CONTEXT (t);
7870 if (ctype == current_class_type)
7873 pedwarn ("member functions are implicitly friends of their class");
7875 pedwarn ("extra qualification %<%T::%> on member %qs",
7878 else if (/* If the qualifying type is already complete, then we
7879 can skip the following checks. */
7880 !COMPLETE_TYPE_P (ctype)
7881 && (/* If the function is being defined, then
7882 qualifying type must certainly be complete. */
7884 /* A friend declaration of "T::f" is OK, even if
7885 "T" is a template parameter. But, if this
7886 function is not a friend, the qualifying type
7888 || (!friendp && !CLASS_TYPE_P (ctype))
7889 /* For a declaration, the type need not be
7890 complete, if either it is dependent (since there
7891 is no meaningful definition of complete in that
7892 case) or the qualifying class is currently being
7894 || !(dependent_type_p (ctype)
7895 || currently_open_class (ctype)))
7896 /* Check that the qualifying type is complete. */
7897 && !complete_type_or_else (ctype, NULL_TREE))
7898 return error_mark_node;
7899 else if (TREE_CODE (type) == FUNCTION_TYPE)
7901 tree sname = declarator->u.id.unqualified_name;
7903 if (current_class_type
7904 && (!friendp || funcdef_flag))
7907 ? "cannot define member function %<%T::%s%> within %<%T%>"
7908 : "cannot declare member function %<%T::%s%> within %<%T%>",
7909 ctype, name, current_class_type);
7910 return error_mark_node;
7913 if (TREE_CODE (sname) == IDENTIFIER_NODE
7914 && NEW_DELETE_OPNAME_P (sname))
7915 /* Overloaded operator new and operator delete
7916 are always static functions. */
7919 type = build_memfn_type (type, ctype, memfn_quals);
7921 else if (declspecs->specs[(int)ds_typedef]
7922 && current_class_type)
7924 error ("cannot declare member %<%T::%s%> within %qT",
7925 ctype, name, current_class_type);
7926 return error_mark_node;
7930 /* Now TYPE has the actual type. */
7935 *attrlist = chainon (returned_attrs, *attrlist);
7937 attrlist = &returned_attrs;
7940 /* Handle parameter packs. */
7941 if (parameter_pack_p)
7943 if (decl_context == PARM)
7944 /* Turn the type into a pack expansion.*/
7945 type = make_pack_expansion (type);
7947 error ("non-parameter %qs cannot be a parameter pack", name);
7950 /* Did array size calculations overflow? */
7952 if (TREE_CODE (type) == ARRAY_TYPE
7953 && COMPLETE_TYPE_P (type)
7954 && TREE_CODE (TYPE_SIZE_UNIT (type)) == INTEGER_CST
7955 && TREE_OVERFLOW (TYPE_SIZE_UNIT (type)))
7957 error ("size of array %qs is too large", name);
7958 /* If we proceed with the array type as it is, we'll eventually
7959 crash in tree_low_cst(). */
7960 type = error_mark_node;
7963 if ((decl_context == FIELD || decl_context == PARM)
7964 && !processing_template_decl
7965 && variably_modified_type_p (type, NULL_TREE))
7967 if (decl_context == FIELD)
7968 error ("data member may not have variably modified type %qT", type);
7970 error ("parameter may not have variably modified type %qT", type);
7971 type = error_mark_node;
7974 if (explicitp == 1 || (explicitp && friendp))
7976 /* [dcl.fct.spec] The explicit specifier shall only be used in
7977 declarations of constructors within a class definition. */
7978 error ("only declarations of constructors can be %<explicit%>");
7982 if (storage_class == sc_mutable)
7984 if (decl_context != FIELD || friendp)
7986 error ("non-member %qs cannot be declared %<mutable%>", name);
7987 storage_class = sc_none;
7989 else if (decl_context == TYPENAME || declspecs->specs[(int)ds_typedef])
7991 error ("non-object member %qs cannot be declared %<mutable%>", name);
7992 storage_class = sc_none;
7994 else if (TREE_CODE (type) == FUNCTION_TYPE
7995 || TREE_CODE (type) == METHOD_TYPE)
7997 error ("function %qs cannot be declared %<mutable%>", name);
7998 storage_class = sc_none;
8002 error ("static %qs cannot be declared %<mutable%>", name);
8003 storage_class = sc_none;
8005 else if (type_quals & TYPE_QUAL_CONST)
8007 error ("const %qs cannot be declared %<mutable%>", name);
8008 storage_class = sc_none;
8012 /* If this is declaring a typedef name, return a TYPE_DECL. */
8013 if (declspecs->specs[(int)ds_typedef] && decl_context != TYPENAME)
8017 /* Note that the grammar rejects storage classes
8018 in typenames, fields or parameters. */
8019 if (current_lang_name == lang_name_java)
8020 TYPE_FOR_JAVA (type) = 1;
8022 /* This declaration:
8024 typedef void f(int) const;
8026 declares a function type which is not a member of any
8027 particular class, but which is cv-qualified; for
8028 example "f S::*" declares a pointer to a const-qualified
8029 member function of S. We record the cv-qualification in the
8031 if (memfn_quals && TREE_CODE (type) == FUNCTION_TYPE)
8032 type = cp_build_qualified_type (type, memfn_quals);
8034 if (decl_context == FIELD)
8035 decl = build_lang_decl (TYPE_DECL, unqualified_id, type);
8037 decl = build_decl (TYPE_DECL, unqualified_id, type);
8038 if (id_declarator && declarator->u.id.qualifying_scope)
8039 error ("%Jtypedef name may not be a nested-name-specifier", decl);
8041 if (decl_context != FIELD)
8043 if (!current_function_decl)
8044 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
8045 else if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (current_function_decl)
8046 || (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P
8047 (current_function_decl)))
8048 /* The TYPE_DECL is "abstract" because there will be
8049 clones of this constructor/destructor, and there will
8050 be copies of this TYPE_DECL generated in those
8052 DECL_ABSTRACT (decl) = 1;
8054 else if (constructor_name_p (unqualified_id, current_class_type))
8055 pedwarn ("ISO C++ forbids nested type %qD with same name "
8056 "as enclosing class",
8059 /* If the user declares "typedef struct {...} foo" then the
8060 struct will have an anonymous name. Fill that name in now.
8061 Nothing can refer to it, so nothing needs know about the name
8063 if (type != error_mark_node
8066 && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
8067 && TYPE_ANONYMOUS_P (type)
8068 /* Don't do this if there are attributes. */
8069 && (!attrlist || !*attrlist)
8070 && cp_type_quals (type) == TYPE_UNQUALIFIED)
8072 tree oldname = TYPE_NAME (type);
8075 /* Replace the anonymous name with the real name everywhere. */
8076 for (t = TYPE_MAIN_VARIANT (type); t; t = TYPE_NEXT_VARIANT (t))
8077 if (TYPE_NAME (t) == oldname)
8078 TYPE_NAME (t) = decl;
8080 if (TYPE_LANG_SPECIFIC (type))
8081 TYPE_WAS_ANONYMOUS (type) = 1;
8083 /* If this is a typedef within a template class, the nested
8084 type is a (non-primary) template. The name for the
8085 template needs updating as well. */
8086 if (TYPE_LANG_SPECIFIC (type) && CLASSTYPE_TEMPLATE_INFO (type))
8087 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type))
8088 = TYPE_IDENTIFIER (type);
8090 /* FIXME remangle member functions; member functions of a
8091 type with external linkage have external linkage. */
8094 /* Any qualifiers on a function type typedef have already been
8096 if (memfn_quals && !ctype && TREE_CODE (type) == FUNCTION_TYPE)
8097 memfn_quals = TYPE_UNQUALIFIED;
8100 || (typedef_decl && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl)))
8101 C_TYPEDEF_EXPLICITLY_SIGNED (decl) = 1;
8103 bad_specifiers (decl, "type", virtualp,
8104 memfn_quals != TYPE_UNQUALIFIED,
8105 inlinep, friendp, raises != NULL_TREE);
8110 /* Detect the case of an array type of unspecified size
8111 which came, as such, direct from a typedef name.
8112 We must copy the type, so that the array's domain can be
8113 individually set by the object's initializer. */
8115 if (type && typedef_type
8116 && TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type)
8117 && TYPE_MAIN_VARIANT (type) == TYPE_MAIN_VARIANT (typedef_type))
8118 type = build_cplus_array_type (TREE_TYPE (type), NULL_TREE);
8120 /* Detect where we're using a typedef of function type to declare a
8121 function. PARMS will not be set, so we must create it now. */
8123 if (type == typedef_type && TREE_CODE (type) == FUNCTION_TYPE)
8125 tree decls = NULL_TREE;
8128 for (args = TYPE_ARG_TYPES (type); args; args = TREE_CHAIN (args))
8130 tree decl = cp_build_parm_decl (NULL_TREE, TREE_VALUE (args));
8132 TREE_CHAIN (decl) = decls;
8136 parms = nreverse (decls);
8138 if (decl_context != TYPENAME)
8140 /* A cv-qualifier-seq shall only be part of the function type
8141 for a non-static member function. [8.3.5/4 dcl.fct] */
8142 if (cp_type_quals (type) != TYPE_UNQUALIFIED
8143 && (current_class_type == NULL_TREE || staticp) )
8146 ? G_("qualified function types cannot be used to "
8147 "declare static member functions")
8148 : G_("qualified function types cannot be used to "
8149 "declare free functions"));
8150 type = TYPE_MAIN_VARIANT (type);
8153 /* The qualifiers on the function type become the qualifiers on
8154 the non-static member function. */
8155 memfn_quals |= cp_type_quals (type);
8159 /* If this is a type name (such as, in a cast or sizeof),
8160 compute the type and return it now. */
8162 if (decl_context == TYPENAME)
8164 /* Note that the grammar rejects storage classes
8165 in typenames, fields or parameters. */
8166 if (type_quals != TYPE_UNQUALIFIED)
8167 type_quals = TYPE_UNQUALIFIED;
8169 /* Special case: "friend class foo" looks like a TYPENAME context. */
8172 if (type_quals != TYPE_UNQUALIFIED)
8174 error ("type qualifiers specified for friend class declaration");
8175 type_quals = TYPE_UNQUALIFIED;
8179 error ("%<inline%> specified for friend class declaration");
8185 /* Don't allow friend declaration without a class-key. */
8186 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
8187 pedwarn ("template parameters cannot be friends");
8188 else if (TREE_CODE (type) == TYPENAME_TYPE)
8189 pedwarn ("friend declaration requires class-key, "
8190 "i.e. %<friend class %T::%D%>",
8191 TYPE_CONTEXT (type), TYPENAME_TYPE_FULLNAME (type));
8193 pedwarn ("friend declaration requires class-key, "
8194 "i.e. %<friend %#T%>",
8198 /* Only try to do this stuff if we didn't already give up. */
8199 if (type != integer_type_node)
8201 /* A friendly class? */
8202 if (current_class_type)
8203 make_friend_class (current_class_type, TYPE_MAIN_VARIANT (type),
8206 error ("trying to make class %qT a friend of global scope",
8209 type = void_type_node;
8212 else if (memfn_quals)
8214 if (ctype == NULL_TREE)
8216 if (TREE_CODE (type) != METHOD_TYPE)
8217 error ("invalid qualifiers on non-member function type");
8219 ctype = TYPE_METHOD_BASETYPE (type);
8222 type = build_memfn_type (type, ctype, memfn_quals);
8227 else if (unqualified_id == NULL_TREE && decl_context != PARM
8228 && decl_context != CATCHPARM
8229 && TREE_CODE (type) != UNION_TYPE
8232 error ("abstract declarator %qT used as declaration", type);
8233 return error_mark_node;
8236 /* Only functions may be declared using an operator-function-id. */
8238 && IDENTIFIER_OPNAME_P (unqualified_id)
8239 && TREE_CODE (type) != FUNCTION_TYPE
8240 && TREE_CODE (type) != METHOD_TYPE)
8242 error ("declaration of %qD as non-function", unqualified_id);
8243 return error_mark_node;
8246 /* We don't check parameter types here because we can emit a better
8247 error message later. */
8248 if (decl_context != PARM)
8250 type = check_var_type (unqualified_id, type);
8251 if (type == error_mark_node)
8252 return error_mark_node;
8255 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
8256 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
8258 if (decl_context == PARM || decl_context == CATCHPARM)
8260 if (ctype || in_namespace)
8261 error ("cannot use %<::%> in parameter declaration");
8263 /* A parameter declared as an array of T is really a pointer to T.
8264 One declared as a function is really a pointer to a function.
8265 One declared as a member is really a pointer to member. */
8267 if (TREE_CODE (type) == ARRAY_TYPE)
8269 /* Transfer const-ness of array into that of type pointed to. */
8270 type = build_pointer_type (TREE_TYPE (type));
8271 type_quals = TYPE_UNQUALIFIED;
8273 else if (TREE_CODE (type) == FUNCTION_TYPE)
8274 type = build_pointer_type (type);
8280 if (decl_context == PARM)
8282 decl = cp_build_parm_decl (unqualified_id, type);
8284 bad_specifiers (decl, "parameter", virtualp,
8285 memfn_quals != TYPE_UNQUALIFIED,
8286 inlinep, friendp, raises != NULL_TREE);
8288 else if (decl_context == FIELD)
8290 /* The C99 flexible array extension. */
8291 if (!staticp && TREE_CODE (type) == ARRAY_TYPE
8292 && TYPE_DOMAIN (type) == NULL_TREE)
8294 tree itype = compute_array_index_type (dname, integer_zero_node);
8295 type = build_cplus_array_type (TREE_TYPE (type), itype);
8298 if (type == error_mark_node)
8300 /* Happens when declaring arrays of sizes which
8301 are error_mark_node, for example. */
8304 else if (in_namespace && !friendp)
8306 /* Something like struct S { int N::j; }; */
8307 error ("invalid use of %<::%>");
8308 return error_mark_node;
8310 else if (TREE_CODE (type) == FUNCTION_TYPE)
8313 tree function_context;
8317 if (ctype == NULL_TREE)
8318 ctype = current_class_type;
8320 if (ctype == NULL_TREE)
8322 error ("can't make %qD into a method -- not in a class",
8324 return error_mark_node;
8327 /* ``A union may [ ... ] not [ have ] virtual functions.''
8329 if (virtualp && TREE_CODE (ctype) == UNION_TYPE)
8331 error ("function %qD declared virtual inside a union",
8333 return error_mark_node;
8336 if (NEW_DELETE_OPNAME_P (unqualified_id))
8340 error ("%qD cannot be declared virtual, since it "
8346 else if (staticp < 2)
8347 type = build_memfn_type (type, ctype, memfn_quals);
8350 /* Check that the name used for a destructor makes sense. */
8351 if (sfk == sfk_destructor)
8355 gcc_assert (friendp);
8356 error ("expected qualified name in friend declaration "
8357 "for destructor %qD",
8358 id_declarator->u.id.unqualified_name);
8359 return error_mark_node;
8362 if (!same_type_p (TREE_OPERAND
8363 (id_declarator->u.id.unqualified_name, 0),
8366 error ("declaration of %qD as member of %qT",
8367 id_declarator->u.id.unqualified_name, ctype);
8368 return error_mark_node;
8372 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
8373 function_context = (ctype != NULL_TREE) ?
8374 decl_function_context (TYPE_MAIN_DECL (ctype)) : NULL_TREE;
8375 publicp = (! friendp || ! staticp)
8376 && function_context == NULL_TREE;
8377 decl = grokfndecl (ctype, type,
8378 TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
8379 ? unqualified_id : dname,
8382 virtualp, flags, memfn_quals, raises,
8383 friendp ? -1 : 0, friendp, publicp, inlinep,
8385 funcdef_flag, template_count, in_namespace, attrlist);
8386 if (decl == NULL_TREE)
8387 return error_mark_node;
8389 /* This clobbers the attrs stored in `decl' from `attrlist'. */
8390 /* The decl and setting of decl_attr is also turned off. */
8391 decl = build_decl_attribute_variant (decl, decl_attr);
8394 /* [class.conv.ctor]
8396 A constructor declared without the function-specifier
8397 explicit that can be called with a single parameter
8398 specifies a conversion from the type of its first
8399 parameter to the type of its class. Such a constructor
8400 is called a converting constructor. */
8402 DECL_NONCONVERTING_P (decl) = 1;
8403 else if (DECL_CONSTRUCTOR_P (decl))
8405 /* The constructor can be called with exactly one
8406 parameter if there is at least one parameter, and
8407 any subsequent parameters have default arguments.
8408 Ignore any compiler-added parms. */
8409 tree arg_types = FUNCTION_FIRST_USER_PARMTYPE (decl);
8411 if (arg_types == void_list_node
8413 && TREE_CHAIN (arg_types)
8414 && TREE_CHAIN (arg_types) != void_list_node
8415 && !TREE_PURPOSE (TREE_CHAIN (arg_types))))
8416 DECL_NONCONVERTING_P (decl) = 1;
8419 else if (TREE_CODE (type) == METHOD_TYPE)
8421 /* We only get here for friend declarations of
8422 members of other classes. */
8423 /* All method decls are public, so tell grokfndecl to set
8424 TREE_PUBLIC, also. */
8425 decl = grokfndecl (ctype, type,
8426 TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
8427 ? unqualified_id : dname,
8430 virtualp, flags, memfn_quals, raises,
8431 friendp ? -1 : 0, friendp, 1, 0, sfk,
8432 funcdef_flag, template_count, in_namespace,
8434 if (decl == NULL_TREE)
8435 return error_mark_node;
8437 else if (!staticp && !dependent_type_p (type)
8438 && !COMPLETE_TYPE_P (complete_type (type))
8439 && (TREE_CODE (type) != ARRAY_TYPE || initialized == 0))
8442 error ("field %qD has incomplete type", unqualified_id);
8444 error ("name %qT has incomplete type", type);
8446 /* If we're instantiating a template, tell them which
8447 instantiation made the field's type be incomplete. */
8448 if (current_class_type
8449 && TYPE_NAME (current_class_type)
8450 && IDENTIFIER_TEMPLATE (TYPE_IDENTIFIER (current_class_type))
8452 && declspecs->type == type)
8453 error (" in instantiation of template %qT",
8454 current_class_type);
8456 return error_mark_node;
8462 error ("%qE is neither function nor member function; "
8463 "cannot be declared friend", unqualified_id);
8471 /* Friends are treated specially. */
8472 if (ctype == current_class_type)
8473 ; /* We already issued a pedwarn. */
8474 else if (decl && DECL_NAME (decl))
8476 if (template_class_depth (current_class_type) == 0)
8478 decl = check_explicit_specialization
8479 (unqualified_id, decl, template_count,
8480 2 * funcdef_flag + 4);
8481 if (decl == error_mark_node)
8482 return error_mark_node;
8485 decl = do_friend (ctype, unqualified_id, decl,
8491 return error_mark_node;
8494 /* Structure field. It may not be a function, except for C++. */
8496 if (decl == NULL_TREE)
8502 /* An attempt is being made to initialize a non-static
8503 member. But, from [class.mem]:
8505 4 A member-declarator can contain a
8506 constant-initializer only if it declares a static
8507 member (_class.static_) of integral or enumeration
8508 type, see _class.static.data_.
8510 This used to be relatively common practice, but
8511 the rest of the compiler does not correctly
8512 handle the initialization unless the member is
8513 static so we make it static below. */
8514 pedwarn ("ISO C++ forbids initialization of member %qD",
8516 pedwarn ("making %qD static", unqualified_id);
8520 if (uses_template_parms (type))
8521 /* We'll check at instantiation time. */
8523 else if (check_static_variable_definition (unqualified_id,
8525 /* If we just return the declaration, crashes
8526 will sometimes occur. We therefore return
8527 void_type_node, as if this was a friend
8528 declaration, to cause callers to completely
8529 ignore this declaration. */
8530 return error_mark_node;
8535 /* C++ allows static class members. All other work
8536 for this is done by grokfield. */
8537 decl = build_lang_decl (VAR_DECL, unqualified_id, type);
8538 set_linkage_for_static_data_member (decl);
8539 /* Even if there is an in-class initialization, DECL
8540 is considered undefined until an out-of-class
8541 definition is provided. */
8542 DECL_EXTERNAL (decl) = 1;
8545 DECL_TLS_MODEL (decl) = decl_default_tls_model (decl);
8549 decl = build_decl (FIELD_DECL, unqualified_id, type);
8550 DECL_NONADDRESSABLE_P (decl) = bitfield;
8551 if (bitfield && !unqualified_id)
8552 TREE_NO_WARNING (decl) = 1;
8554 if (storage_class == sc_mutable)
8556 DECL_MUTABLE_P (decl) = 1;
8557 storage_class = sc_none;
8561 bad_specifiers (decl, "field", virtualp,
8562 memfn_quals != TYPE_UNQUALIFIED,
8563 inlinep, friendp, raises != NULL_TREE);
8566 else if (TREE_CODE (type) == FUNCTION_TYPE
8567 || TREE_CODE (type) == METHOD_TYPE)
8572 if (!unqualified_id)
8573 return error_mark_node;
8575 if (TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR)
8576 original_name = dname;
8578 original_name = unqualified_id;
8580 if (storage_class == sc_auto)
8581 error ("storage class %<auto%> invalid for function %qs", name);
8582 else if (storage_class == sc_register)
8583 error ("storage class %<register%> invalid for function %qs", name);
8585 error ("storage class %<__thread%> invalid for function %qs", name);
8587 /* Function declaration not at top level.
8588 Storage classes other than `extern' are not allowed
8589 and `extern' makes no difference. */
8590 if (! toplevel_bindings_p ()
8591 && (storage_class == sc_static
8592 || declspecs->specs[(int)ds_inline])
8595 if (storage_class == sc_static)
8596 pedwarn ("%<static%> specified invalid for function %qs "
8597 "declared out of global scope", name);
8599 pedwarn ("%<inline%> specifier invalid for function %qs "
8600 "declared out of global scope", name);
8603 if (ctype == NULL_TREE)
8607 error ("virtual non-class function %qs", name);
8611 else if (TREE_CODE (type) == FUNCTION_TYPE && staticp < 2
8612 && !NEW_DELETE_OPNAME_P (original_name))
8613 type = build_method_type_directly (ctype,
8615 TYPE_ARG_TYPES (type));
8617 /* Record presence of `static'. */
8618 publicp = (ctype != NULL_TREE
8619 || storage_class == sc_extern
8620 || storage_class != sc_static);
8622 decl = grokfndecl (ctype, type, original_name, parms, unqualified_id,
8623 virtualp, flags, memfn_quals, raises,
8625 publicp, inlinep, sfk, funcdef_flag,
8626 template_count, in_namespace, attrlist);
8627 if (decl == NULL_TREE)
8628 return error_mark_node;
8632 int invalid_static = 0;
8634 /* Don't allow a static member function in a class, and forbid
8635 declaring main to be static. */
8636 if (TREE_CODE (type) == METHOD_TYPE)
8638 pedwarn ("cannot declare member function %qD to have "
8639 "static linkage", decl);
8642 else if (current_function_decl)
8644 /* FIXME need arm citation */
8645 error ("cannot declare static function inside another function");
8652 storage_class = sc_none;
8658 /* It's a variable. */
8660 /* An uninitialized decl with `extern' is a reference. */
8661 decl = grokvardecl (type, unqualified_id,
8664 (type_quals & TYPE_QUAL_CONST) != 0,
8665 ctype ? ctype : in_namespace);
8666 bad_specifiers (decl, "variable", virtualp,
8667 memfn_quals != TYPE_UNQUALIFIED,
8668 inlinep, friendp, raises != NULL_TREE);
8672 DECL_CONTEXT (decl) = ctype;
8675 pedwarn ("%<static%> may not be used when defining "
8676 "(as opposed to declaring) a static data member");
8678 storage_class = sc_none;
8680 if (storage_class == sc_register && TREE_STATIC (decl))
8682 error ("static member %qD declared %<register%>", decl);
8683 storage_class = sc_none;
8685 if (storage_class == sc_extern && pedantic)
8687 pedwarn ("cannot explicitly declare member %q#D to have "
8690 storage_class = sc_none;
8695 /* Record `register' declaration for warnings on &
8696 and in case doing stupid register allocation. */
8698 if (storage_class == sc_register)
8699 DECL_REGISTER (decl) = 1;
8700 else if (storage_class == sc_extern)
8701 DECL_THIS_EXTERN (decl) = 1;
8702 else if (storage_class == sc_static)
8703 DECL_THIS_STATIC (decl) = 1;
8705 /* Record constancy and volatility. There's no need to do this
8706 when processing a template; we'll do this for the instantiated
8707 declaration based on the type of DECL. */
8708 if (!processing_template_decl)
8709 cp_apply_type_quals_to_decl (type_quals, decl);
8712 TREE_NO_WARNING (decl) = 1;
8718 /* Subroutine of start_function. Ensure that each of the parameter
8719 types (as listed in PARMS) is complete, as is required for a
8720 function definition. */
8723 require_complete_types_for_parms (tree parms)
8725 for (; parms; parms = TREE_CHAIN (parms))
8727 if (dependent_type_p (TREE_TYPE (parms)))
8729 if (!VOID_TYPE_P (TREE_TYPE (parms))
8730 && complete_type_or_else (TREE_TYPE (parms), parms))
8732 relayout_decl (parms);
8733 DECL_ARG_TYPE (parms) = type_passed_as (TREE_TYPE (parms));
8736 /* grokparms or complete_type_or_else will have already issued
8738 TREE_TYPE (parms) = error_mark_node;
8742 /* Returns nonzero if T is a local variable. */
8745 local_variable_p (tree t)
8747 if ((TREE_CODE (t) == VAR_DECL
8748 /* A VAR_DECL with a context that is a _TYPE is a static data
8750 && !TYPE_P (CP_DECL_CONTEXT (t))
8751 /* Any other non-local variable must be at namespace scope. */
8752 && !DECL_NAMESPACE_SCOPE_P (t))
8753 || (TREE_CODE (t) == PARM_DECL))
8759 /* Returns nonzero if T is an automatic local variable or a label.
8760 (These are the declarations that need to be remapped when the code
8761 containing them is duplicated.) */
8764 nonstatic_local_decl_p (tree t)
8766 return ((local_variable_p (t) && !TREE_STATIC (t))
8767 || TREE_CODE (t) == LABEL_DECL
8768 || TREE_CODE (t) == RESULT_DECL);
8771 /* Like local_variable_p, but suitable for use as a tree-walking
8775 local_variable_p_walkfn (tree *tp, int *walk_subtrees,
8776 void *data ATTRIBUTE_UNUSED)
8778 if (local_variable_p (*tp) && !DECL_ARTIFICIAL (*tp))
8780 else if (TYPE_P (*tp))
8787 /* Check that ARG, which is a default-argument expression for a
8788 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
8789 something goes wrong. DECL may also be a _TYPE node, rather than a
8790 DECL, if there is no DECL available. */
8793 check_default_argument (tree decl, tree arg)
8798 if (TREE_CODE (arg) == DEFAULT_ARG)
8799 /* We get a DEFAULT_ARG when looking at an in-class declaration
8800 with a default argument. Ignore the argument for now; we'll
8801 deal with it after the class is complete. */
8810 decl_type = TREE_TYPE (decl);
8812 if (arg == error_mark_node
8813 || decl == error_mark_node
8814 || TREE_TYPE (arg) == error_mark_node
8815 || decl_type == error_mark_node)
8816 /* Something already went wrong. There's no need to check
8818 return error_mark_node;
8820 /* [dcl.fct.default]
8822 A default argument expression is implicitly converted to the
8824 if (!TREE_TYPE (arg)
8825 || !can_convert_arg (decl_type, TREE_TYPE (arg), arg, LOOKUP_NORMAL))
8828 error ("default argument for %q#D has type %qT",
8829 decl, TREE_TYPE (arg));
8831 error ("default argument for parameter of type %qT has type %qT",
8832 decl_type, TREE_TYPE (arg));
8834 return error_mark_node;
8837 /* [dcl.fct.default]
8839 Local variables shall not be used in default argument
8842 The keyword `this' shall not be used in a default argument of a
8844 var = walk_tree_without_duplicates (&arg, local_variable_p_walkfn,
8848 error ("default argument %qE uses local variable %qD", arg, var);
8849 return error_mark_node;
8856 /* Decode the list of parameter types for a function type.
8857 Given the list of things declared inside the parens,
8858 return a list of types.
8860 If this parameter does not end with an ellipsis, we append
8863 *PARMS is set to the chain of PARM_DECLs created. */
8866 grokparms (cp_parameter_declarator *first_parm, tree *parms)
8868 tree result = NULL_TREE;
8869 tree decls = NULL_TREE;
8870 int ellipsis = !first_parm || first_parm->ellipsis_p;
8871 cp_parameter_declarator *parm;
8874 for (parm = first_parm; parm != NULL; parm = parm->next)
8876 tree type = NULL_TREE;
8877 tree init = parm->default_argument;
8881 if (parm == no_parameters)
8884 attrs = parm->decl_specifiers.attributes;
8885 parm->decl_specifiers.attributes = NULL_TREE;
8886 decl = grokdeclarator (parm->declarator, &parm->decl_specifiers,
8887 PARM, init != NULL_TREE, &attrs);
8888 if (! decl || TREE_TYPE (decl) == error_mark_node)
8892 cplus_decl_attributes (&decl, attrs, 0);
8894 type = TREE_TYPE (decl);
8895 if (VOID_TYPE_P (type))
8897 if (same_type_p (type, void_type_node)
8898 && DECL_SELF_REFERENCE_P (type)
8899 && !DECL_NAME (decl) && !result && !parm->next && !ellipsis)
8900 /* this is a parmlist of `(void)', which is ok. */
8902 cxx_incomplete_type_error (decl, type);
8903 /* It's not a good idea to actually create parameters of
8904 type `void'; other parts of the compiler assume that a
8905 void type terminates the parameter list. */
8906 type = error_mark_node;
8907 TREE_TYPE (decl) = error_mark_node;
8910 if (type != error_mark_node)
8912 /* Top-level qualifiers on the parameters are
8913 ignored for function types. */
8914 type = cp_build_qualified_type (type, 0);
8915 if (TREE_CODE (type) == METHOD_TYPE)
8917 error ("parameter %qD invalidly declared method type", decl);
8918 type = build_pointer_type (type);
8919 TREE_TYPE (decl) = type;
8921 else if (abstract_virtuals_error (decl, type))
8922 any_error = 1; /* Seems like a good idea. */
8923 else if (POINTER_TYPE_P (type))
8925 /* [dcl.fct]/6, parameter types cannot contain pointers
8926 (references) to arrays of unknown bound. */
8927 tree t = TREE_TYPE (type);
8928 int ptr = TYPE_PTR_P (type);
8934 else if (TREE_CODE (t) != ARRAY_TYPE)
8936 else if (!TYPE_DOMAIN (t))
8940 if (TREE_CODE (t) == ARRAY_TYPE)
8941 error ("parameter %qD includes %s to array of unknown "
8943 decl, ptr ? "pointer" : "reference", t);
8948 else if (init && !processing_template_decl)
8949 init = check_default_argument (decl, init);
8952 if (TREE_CODE (decl) == PARM_DECL
8953 && FUNCTION_PARAMETER_PACK_P (decl)
8955 error ("parameter packs must be at the end of the parameter list");
8957 TREE_CHAIN (decl) = decls;
8959 result = tree_cons (init, type, result);
8961 decls = nreverse (decls);
8962 result = nreverse (result);
8964 result = chainon (result, void_list_node);
8971 /* D is a constructor or overloaded `operator='.
8973 Let T be the class in which D is declared. Then, this function
8976 -1 if D's is an ill-formed constructor or copy assignment operator
8977 whose first parameter is of type `T'.
8978 0 if D is not a copy constructor or copy assignment
8980 1 if D is a copy constructor or copy assignment operator whose
8981 first parameter is a reference to const qualified T.
8982 2 if D is a copy constructor or copy assignment operator whose
8983 first parameter is a reference to non-const qualified T.
8985 This function can be used as a predicate. Positive values indicate
8986 a copy constructor and nonzero values indicate a copy assignment
8996 gcc_assert (DECL_FUNCTION_MEMBER_P (d));
8998 if (TREE_CODE (d) == TEMPLATE_DECL
8999 || (DECL_TEMPLATE_INFO (d)
9000 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d))))
9001 /* Instantiations of template member functions are never copy
9002 functions. Note that member functions of templated classes are
9003 represented as template functions internally, and we must
9004 accept those as copy functions. */
9007 args = FUNCTION_FIRST_USER_PARMTYPE (d);
9011 arg_type = TREE_VALUE (args);
9012 if (arg_type == error_mark_node)
9015 if (TYPE_MAIN_VARIANT (arg_type) == DECL_CONTEXT (d))
9017 /* Pass by value copy assignment operator. */
9020 else if (TREE_CODE (arg_type) == REFERENCE_TYPE
9021 && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type)) == DECL_CONTEXT (d))
9023 if (CP_TYPE_CONST_P (TREE_TYPE (arg_type)))
9029 args = TREE_CHAIN (args);
9031 if (args && args != void_list_node && !TREE_PURPOSE (args))
9032 /* There are more non-optional args. */
9038 /* Remember any special properties of member function DECL. */
9040 void grok_special_member_properties (tree decl)
9044 if (!DECL_NONSTATIC_MEMBER_FUNCTION_P (decl))
9047 class_type = DECL_CONTEXT (decl);
9048 if (DECL_CONSTRUCTOR_P (decl))
9050 int ctor = copy_fn_p (decl);
9052 TYPE_HAS_CONSTRUCTOR (class_type) = 1;
9058 A non-template constructor for class X is a copy
9059 constructor if its first parameter is of type X&, const
9060 X&, volatile X& or const volatile X&, and either there
9061 are no other parameters or else all other parameters have
9062 default arguments. */
9063 TYPE_HAS_INIT_REF (class_type) = 1;
9065 TYPE_HAS_CONST_INIT_REF (class_type) = 1;
9067 else if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl)))
9068 TYPE_HAS_DEFAULT_CONSTRUCTOR (class_type) = 1;
9070 else if (DECL_OVERLOADED_OPERATOR_P (decl) == NOP_EXPR)
9074 A non-template assignment operator for class X is a copy
9075 assignment operator if its parameter is of type X, X&, const
9076 X&, volatile X& or const volatile X&. */
9078 int assop = copy_fn_p (decl);
9082 TYPE_HAS_ASSIGN_REF (class_type) = 1;
9084 TYPE_HAS_CONST_ASSIGN_REF (class_type) = 1;
9089 /* Check a constructor DECL has the correct form. Complains
9090 if the class has a constructor of the form X(X). */
9093 grok_ctor_properties (tree ctype, tree decl)
9095 int ctor_parm = copy_fn_p (decl);
9101 A declaration of a constructor for a class X is ill-formed if
9102 its first parameter is of type (optionally cv-qualified) X
9103 and either there are no other parameters or else all other
9104 parameters have default arguments.
9106 We *don't* complain about member template instantiations that
9107 have this form, though; they can occur as we try to decide
9108 what constructor to use during overload resolution. Since
9109 overload resolution will never prefer such a constructor to
9110 the non-template copy constructor (which is either explicitly
9111 or implicitly defined), there's no need to worry about their
9112 existence. Theoretically, they should never even be
9113 instantiated, but that's hard to forestall. */
9114 error ("invalid constructor; you probably meant %<%T (const %T&)%>",
9122 /* An operator with this code is unary, but can also be binary. */
9125 ambi_op_p (enum tree_code code)
9127 return (code == INDIRECT_REF
9128 || code == ADDR_EXPR
9129 || code == UNARY_PLUS_EXPR
9130 || code == NEGATE_EXPR
9131 || code == PREINCREMENT_EXPR
9132 || code == PREDECREMENT_EXPR);
9135 /* An operator with this name can only be unary. */
9138 unary_op_p (enum tree_code code)
9140 return (code == TRUTH_NOT_EXPR
9141 || code == BIT_NOT_EXPR
9142 || code == COMPONENT_REF
9143 || code == TYPE_EXPR);
9146 /* DECL is a declaration for an overloaded operator. If COMPLAIN is true,
9147 errors are issued for invalid declarations. */
9150 grok_op_properties (tree decl, bool complain)
9152 tree argtypes = TYPE_ARG_TYPES (TREE_TYPE (decl));
9154 int methodp = (TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE);
9155 tree name = DECL_NAME (decl);
9156 enum tree_code operator_code;
9161 /* Count the number of arguments and check for ellipsis. */
9162 for (argtype = argtypes, arity = 0;
9163 argtype && argtype != void_list_node;
9164 argtype = TREE_CHAIN (argtype))
9166 ellipsis_p = !argtype;
9168 class_type = DECL_CONTEXT (decl);
9169 if (class_type && !CLASS_TYPE_P (class_type))
9170 class_type = NULL_TREE;
9172 if (DECL_CONV_FN_P (decl))
9173 operator_code = TYPE_EXPR;
9177 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
9178 if (ansi_opname (CODE) == name) \
9180 operator_code = (CODE); \
9183 else if (ansi_assopname (CODE) == name) \
9185 operator_code = (CODE); \
9186 DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
9190 #include "operators.def"
9196 gcc_assert (operator_code != LAST_CPLUS_TREE_CODE);
9197 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
9200 switch (operator_code)
9203 TYPE_HAS_NEW_OPERATOR (class_type) = 1;
9207 TYPE_GETS_DELETE (class_type) |= 1;
9211 TYPE_HAS_ARRAY_NEW_OPERATOR (class_type) = 1;
9214 case VEC_DELETE_EXPR:
9215 TYPE_GETS_DELETE (class_type) |= 2;
9222 /* [basic.std.dynamic.allocation]/1:
9224 A program is ill-formed if an allocation function is declared
9225 in a namespace scope other than global scope or declared static
9228 The same also holds true for deallocation functions. */
9229 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR
9230 || operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
9232 if (DECL_NAMESPACE_SCOPE_P (decl))
9234 if (CP_DECL_CONTEXT (decl) != global_namespace)
9236 error ("%qD may not be declared within a namespace", decl);
9239 else if (!TREE_PUBLIC (decl))
9241 error ("%qD may not be declared as static", decl);
9247 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR)
9248 TREE_TYPE (decl) = coerce_new_type (TREE_TYPE (decl));
9249 else if (operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
9250 TREE_TYPE (decl) = coerce_delete_type (TREE_TYPE (decl));
9253 /* An operator function must either be a non-static member function
9254 or have at least one parameter of a class, a reference to a class,
9255 an enumeration, or a reference to an enumeration. 13.4.0.6 */
9256 if (! methodp || DECL_STATIC_FUNCTION_P (decl))
9258 if (operator_code == TYPE_EXPR
9259 || operator_code == CALL_EXPR
9260 || operator_code == COMPONENT_REF
9261 || operator_code == ARRAY_REF
9262 || operator_code == NOP_EXPR)
9264 error ("%qD must be a nonstatic member function", decl);
9271 if (DECL_STATIC_FUNCTION_P (decl))
9273 error ("%qD must be either a non-static member "
9274 "function or a non-member function", decl);
9278 for (p = argtypes; p && p != void_list_node; p = TREE_CHAIN (p))
9280 tree arg = non_reference (TREE_VALUE (p));
9281 if (arg == error_mark_node)
9284 /* IS_AGGR_TYPE, rather than CLASS_TYPE_P, is used
9285 because these checks are performed even on
9286 template functions. */
9287 if (IS_AGGR_TYPE (arg) || TREE_CODE (arg) == ENUMERAL_TYPE)
9291 if (!p || p == void_list_node)
9294 error ("%qD must have an argument of class or "
9295 "enumerated type", decl);
9301 /* There are no restrictions on the arguments to an overloaded
9303 if (operator_code == CALL_EXPR)
9306 /* Warn about conversion operators that will never be used. */
9307 if (IDENTIFIER_TYPENAME_P (name)
9308 && ! DECL_TEMPLATE_INFO (decl)
9310 /* Warn only declaring the function; there is no need to
9311 warn again about out-of-class definitions. */
9312 && class_type == current_class_type)
9314 tree t = TREE_TYPE (name);
9315 int ref = (TREE_CODE (t) == REFERENCE_TYPE);
9316 const char *what = 0;
9319 t = TYPE_MAIN_VARIANT (TREE_TYPE (t));
9321 if (TREE_CODE (t) == VOID_TYPE)
9323 else if (class_type)
9325 if (t == class_type)
9326 what = "the same type";
9327 /* Don't force t to be complete here. */
9328 else if (IS_AGGR_TYPE (t)
9329 && COMPLETE_TYPE_P (t)
9330 && DERIVED_FROM_P (t, class_type))
9331 what = "a base class";
9335 warning (OPT_Wconversion, "conversion to %s%s will never use a type "
9336 "conversion operator",
9337 ref ? "a reference to " : "", what);
9340 if (operator_code == COND_EXPR)
9343 error ("ISO C++ prohibits overloading operator ?:");
9346 else if (ellipsis_p)
9348 error ("%qD must not have variable number of arguments", decl);
9351 else if (ambi_op_p (operator_code))
9354 /* We pick the one-argument operator codes by default, so
9355 we don't have to change anything. */
9357 else if (arity == 2)
9359 /* If we thought this was a unary operator, we now know
9360 it to be a binary operator. */
9361 switch (operator_code)
9364 operator_code = MULT_EXPR;
9368 operator_code = BIT_AND_EXPR;
9371 case UNARY_PLUS_EXPR:
9372 operator_code = PLUS_EXPR;
9376 operator_code = MINUS_EXPR;
9379 case PREINCREMENT_EXPR:
9380 operator_code = POSTINCREMENT_EXPR;
9383 case PREDECREMENT_EXPR:
9384 operator_code = POSTDECREMENT_EXPR;
9391 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
9393 if ((operator_code == POSTINCREMENT_EXPR
9394 || operator_code == POSTDECREMENT_EXPR)
9395 && ! processing_template_decl
9396 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes)), integer_type_node))
9399 error ("postfix %qD must take %<int%> as its argument",
9402 error ("postfix %qD must take %<int%> as its second "
9410 error ("%qD must take either zero or one argument", decl);
9412 error ("%qD must take either one or two arguments", decl);
9416 /* More Effective C++ rule 6. */
9418 && (operator_code == POSTINCREMENT_EXPR
9419 || operator_code == POSTDECREMENT_EXPR
9420 || operator_code == PREINCREMENT_EXPR
9421 || operator_code == PREDECREMENT_EXPR))
9423 tree arg = TREE_VALUE (argtypes);
9424 tree ret = TREE_TYPE (TREE_TYPE (decl));
9425 if (methodp || TREE_CODE (arg) == REFERENCE_TYPE)
9426 arg = TREE_TYPE (arg);
9427 arg = TYPE_MAIN_VARIANT (arg);
9428 if (operator_code == PREINCREMENT_EXPR
9429 || operator_code == PREDECREMENT_EXPR)
9431 if (TREE_CODE (ret) != REFERENCE_TYPE
9432 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret)),
9434 warning (OPT_Weffc__, "prefix %qD should return %qT", decl,
9435 build_reference_type (arg));
9439 if (!same_type_p (TYPE_MAIN_VARIANT (ret), arg))
9440 warning (OPT_Weffc__, "postfix %qD should return %qT", decl, arg);
9444 else if (unary_op_p (operator_code))
9449 error ("%qD must take %<void%>", decl);
9451 error ("%qD must take exactly one argument", decl);
9455 else /* if (binary_op_p (operator_code)) */
9460 error ("%qD must take exactly one argument", decl);
9462 error ("%qD must take exactly two arguments", decl);
9466 /* More Effective C++ rule 7. */
9468 && (operator_code == TRUTH_ANDIF_EXPR
9469 || operator_code == TRUTH_ORIF_EXPR
9470 || operator_code == COMPOUND_EXPR))
9471 warning (OPT_Weffc__, "user-defined %qD always evaluates both arguments",
9475 /* Effective C++ rule 23. */
9478 && !DECL_ASSIGNMENT_OPERATOR_P (decl)
9479 && (operator_code == PLUS_EXPR
9480 || operator_code == MINUS_EXPR
9481 || operator_code == TRUNC_DIV_EXPR
9482 || operator_code == MULT_EXPR
9483 || operator_code == TRUNC_MOD_EXPR)
9484 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl))) == REFERENCE_TYPE)
9485 warning (OPT_Weffc__, "%qD should return by value", decl);
9488 for (; argtypes && argtypes != void_list_node;
9489 argtypes = TREE_CHAIN (argtypes))
9490 if (TREE_PURPOSE (argtypes))
9492 TREE_PURPOSE (argtypes) = NULL_TREE;
9493 if (operator_code == POSTINCREMENT_EXPR
9494 || operator_code == POSTDECREMENT_EXPR)
9497 pedwarn ("%qD cannot have default arguments", decl);
9501 error ("%qD cannot have default arguments", decl);
9509 /* Return a string giving the keyword associate with CODE. */
9512 tag_name (enum tag_types code)
9531 /* Name lookup in an elaborated-type-specifier (after the keyword
9532 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
9533 elaborated-type-specifier is invalid, issue a diagnostic and return
9534 error_mark_node; otherwise, return the *_TYPE to which it referred.
9535 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
9538 check_elaborated_type_specifier (enum tag_types tag_code,
9540 bool allow_template_p)
9546 struct S { struct S *p; };
9548 name lookup will find the TYPE_DECL for the implicit "S::S"
9549 typedef. Adjust for that here. */
9550 if (DECL_SELF_REFERENCE_P (decl))
9551 decl = TYPE_NAME (TREE_TYPE (decl));
9553 type = TREE_TYPE (decl);
9555 /* Check TEMPLATE_TYPE_PARM first because DECL_IMPLICIT_TYPEDEF_P
9556 is false for this case as well. */
9557 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
9559 error ("using template type parameter %qT after %qs",
9560 type, tag_name (tag_code));
9561 return error_mark_node;
9565 If the identifier resolves to a typedef-name or a template
9566 type-parameter, the elaborated-type-specifier is ill-formed.
9568 In other words, the only legitimate declaration to use in the
9569 elaborated type specifier is the implicit typedef created when
9570 the type is declared. */
9571 else if (!DECL_IMPLICIT_TYPEDEF_P (decl)
9572 && tag_code != typename_type)
9574 error ("using typedef-name %qD after %qs", decl, tag_name (tag_code));
9575 error ("%q+D has a previous declaration here", decl);
9576 return error_mark_node;
9578 else if (TREE_CODE (type) != RECORD_TYPE
9579 && TREE_CODE (type) != UNION_TYPE
9580 && tag_code != enum_type
9581 && tag_code != typename_type)
9583 error ("%qT referred to as %qs", type, tag_name (tag_code));
9584 error ("%q+T has a previous declaration here", type);
9585 return error_mark_node;
9587 else if (TREE_CODE (type) != ENUMERAL_TYPE
9588 && tag_code == enum_type)
9590 error ("%qT referred to as enum", type);
9591 error ("%q+T has a previous declaration here", type);
9592 return error_mark_node;
9594 else if (!allow_template_p
9595 && TREE_CODE (type) == RECORD_TYPE
9596 && CLASSTYPE_IS_TEMPLATE (type))
9598 /* If a class template appears as elaborated type specifier
9599 without a template header such as:
9601 template <class T> class C {};
9602 void f(class C); // No template header here
9604 then the required template argument is missing. */
9605 error ("template argument required for %<%s %T%>",
9606 tag_name (tag_code),
9607 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type)));
9608 return error_mark_node;
9614 /* Lookup NAME in elaborate type specifier in scope according to
9615 SCOPE and issue diagnostics if necessary.
9616 Return *_TYPE node upon success, NULL_TREE when the NAME is not
9617 found, and ERROR_MARK_NODE for type error. */
9620 lookup_and_check_tag (enum tag_types tag_code, tree name,
9621 tag_scope scope, bool template_header_p)
9625 if (scope == ts_global)
9627 /* First try ordinary name lookup, ignoring hidden class name
9628 injected via friend declaration. */
9629 decl = lookup_name_prefer_type (name, 2);
9630 /* If that fails, the name will be placed in the smallest
9631 non-class, non-function-prototype scope according to 3.3.1/5.
9632 We may already have a hidden name declared as friend in this
9633 scope. So lookup again but not ignoring hidden names.
9634 If we find one, that name will be made visible rather than
9635 creating a new tag. */
9637 decl = lookup_type_scope (name, ts_within_enclosing_non_class);
9640 decl = lookup_type_scope (name, scope);
9642 if (decl && DECL_CLASS_TEMPLATE_P (decl))
9643 decl = DECL_TEMPLATE_RESULT (decl);
9645 if (decl && TREE_CODE (decl) == TYPE_DECL)
9647 /* Look for invalid nested type:
9651 if (scope == ts_current && DECL_SELF_REFERENCE_P (decl))
9653 error ("%qD has the same name as the class in which it is "
9656 return error_mark_node;
9659 /* Two cases we need to consider when deciding if a class
9660 template is allowed as an elaborated type specifier:
9661 1. It is a self reference to its own class.
9662 2. It comes with a template header.
9666 template <class T> class C {
9667 class C *c1; // DECL_SELF_REFERENCE_P is true
9670 template <class U> class C; // template_header_p is true
9671 template <class T> class C<T>::D {
9672 class C *c2; // DECL_SELF_REFERENCE_P is true
9675 t = check_elaborated_type_specifier (tag_code,
9678 | DECL_SELF_REFERENCE_P (decl));
9685 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
9686 Define the tag as a forward-reference if it is not defined.
9688 If a declaration is given, process it here, and report an error if
9689 multiple declarations are not identical.
9691 SCOPE is TS_CURRENT when this is also a definition. Only look in
9692 the current frame for the name (since C++ allows new names in any
9693 scope.) It is TS_WITHIN_ENCLOSING_NON_CLASS if this is a friend
9694 declaration. Only look beginning from the current scope outward up
9695 till the nearest non-class scope. Otherwise it is TS_GLOBAL.
9697 TEMPLATE_HEADER_P is true when this declaration is preceded by
9698 a set of template parameters. */
9701 xref_tag (enum tag_types tag_code, tree name,
9702 tag_scope scope, bool template_header_p)
9704 enum tree_code code;
9706 tree context = NULL_TREE;
9708 timevar_push (TV_NAME_LOOKUP);
9710 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
9722 code = ENUMERAL_TYPE;
9728 /* In case of anonymous name, xref_tag is only called to
9729 make type node and push name. Name lookup is not required. */
9730 if (ANON_AGGRNAME_P (name))
9733 t = lookup_and_check_tag (tag_code, name,
9734 scope, template_header_p);
9736 if (t == error_mark_node)
9737 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
9739 if (scope != ts_current && t && current_class_type
9740 && template_class_depth (current_class_type)
9741 && template_header_p)
9743 /* Since SCOPE is not TS_CURRENT, we are not looking at a
9744 definition of this tag. Since, in addition, we are currently
9745 processing a (member) template declaration of a template
9746 class, we must be very careful; consider:
9753 { template <class V>
9754 friend struct S1; };
9756 Here, the S2::S1 declaration should not be confused with the
9757 outer declaration. In particular, the inner version should
9758 have a template parameter of level 2, not level 1. This
9759 would be particularly important if the member declaration
9762 template <class V = U> friend struct S1;
9764 say, when we should tsubst into `U' when instantiating
9765 S2. On the other hand, when presented with:
9775 we must find the inner binding eventually. We
9776 accomplish this by making sure that the new type we
9777 create to represent this declaration has the right
9779 context = TYPE_CONTEXT (t);
9785 /* If no such tag is yet defined, create a forward-reference node
9786 and record it as the "definition".
9787 When a real declaration of this type is found,
9788 the forward-reference will be altered into a real type. */
9789 if (code == ENUMERAL_TYPE)
9791 error ("use of enum %q#D without previous declaration", name);
9792 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
9796 t = make_aggr_type (code);
9797 TYPE_CONTEXT (t) = context;
9798 t = pushtag (name, t, scope);
9803 if (template_header_p && IS_AGGR_TYPE (t))
9805 if (!redeclare_class_template (t, current_template_parms))
9806 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
9808 else if (!processing_template_decl
9810 && CLASSTYPE_IS_TEMPLATE (t))
9812 error ("redeclaration of %qT as a non-template", t);
9813 error ("previous declaration %q+D", t);
9814 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
9817 /* Make injected friend class visible. */
9818 if (scope != ts_within_enclosing_non_class
9819 && hidden_name_p (TYPE_NAME (t)))
9821 DECL_ANTICIPATED (TYPE_NAME (t)) = 0;
9822 DECL_FRIEND_P (TYPE_NAME (t)) = 0;
9824 if (TYPE_TEMPLATE_INFO (t))
9826 DECL_ANTICIPATED (TYPE_TI_TEMPLATE (t)) = 0;
9827 DECL_FRIEND_P (TYPE_TI_TEMPLATE (t)) = 0;
9832 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, t);
9836 xref_tag_from_type (tree old, tree id, tag_scope scope)
9838 enum tag_types tag_kind;
9840 if (TREE_CODE (old) == RECORD_TYPE)
9841 tag_kind = (CLASSTYPE_DECLARED_CLASS (old) ? class_type : record_type);
9843 tag_kind = union_type;
9845 if (id == NULL_TREE)
9846 id = TYPE_IDENTIFIER (old);
9848 return xref_tag (tag_kind, id, scope, false);
9851 /* Create the binfo hierarchy for REF with (possibly NULL) base list
9852 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
9853 access_* node, and the TREE_VALUE is the type of the base-class.
9854 Non-NULL TREE_TYPE indicates virtual inheritance.
9856 Returns true if the binfo hierarchy was successfully created,
9857 false if an error was detected. */
9860 xref_basetypes (tree ref, tree base_list)
9863 tree binfo, base_binfo;
9864 unsigned max_vbases = 0; /* Maximum direct & indirect virtual bases. */
9865 unsigned max_bases = 0; /* Maximum direct bases. */
9867 tree default_access;
9868 tree igo_prev; /* Track Inheritance Graph Order. */
9870 if (ref == error_mark_node)
9873 /* The base of a derived class is private by default, all others are
9875 default_access = (TREE_CODE (ref) == RECORD_TYPE
9876 && CLASSTYPE_DECLARED_CLASS (ref)
9877 ? access_private_node : access_public_node);
9879 /* First, make sure that any templates in base-classes are
9880 instantiated. This ensures that if we call ourselves recursively
9881 we do not get confused about which classes are marked and which
9886 tree basetype = TREE_VALUE (*basep);
9888 if (!(processing_template_decl && uses_template_parms (basetype))
9889 && !complete_type_or_else (basetype, NULL))
9890 /* An incomplete type. Remove it from the list. */
9891 *basep = TREE_CHAIN (*basep);
9895 if (TREE_TYPE (*basep))
9897 if (CLASS_TYPE_P (basetype))
9898 max_vbases += VEC_length (tree, CLASSTYPE_VBASECLASSES (basetype));
9899 basep = &TREE_CHAIN (*basep);
9903 TYPE_MARKED_P (ref) = 1;
9905 /* The binfo slot should be empty, unless this is an (ill-formed)
9907 gcc_assert (!TYPE_BINFO (ref) || TYPE_SIZE (ref));
9908 gcc_assert (TYPE_MAIN_VARIANT (ref) == ref);
9910 binfo = make_tree_binfo (max_bases);
9912 TYPE_BINFO (ref) = binfo;
9913 BINFO_OFFSET (binfo) = size_zero_node;
9914 BINFO_TYPE (binfo) = ref;
9918 BINFO_BASE_ACCESSES (binfo) = VEC_alloc (tree, gc, max_bases);
9919 /* An aggregate cannot have baseclasses. */
9920 CLASSTYPE_NON_AGGREGATE (ref) = 1;
9922 if (TREE_CODE (ref) == UNION_TYPE)
9924 error ("derived union %qT invalid", ref);
9931 if (TYPE_FOR_JAVA (ref))
9933 error ("Java class %qT cannot have multiple bases", ref);
9940 CLASSTYPE_VBASECLASSES (ref) = VEC_alloc (tree, gc, max_vbases);
9942 if (TYPE_FOR_JAVA (ref))
9944 error ("Java class %qT cannot have virtual bases", ref);
9949 for (igo_prev = binfo; base_list; base_list = TREE_CHAIN (base_list))
9951 tree access = TREE_PURPOSE (base_list);
9952 int via_virtual = TREE_TYPE (base_list) != NULL_TREE;
9953 tree basetype = TREE_VALUE (base_list);
9955 if (access == access_default_node)
9956 access = default_access;
9958 if (PACK_EXPANSION_P (basetype))
9959 basetype = PACK_EXPANSION_PATTERN (basetype);
9960 if (TREE_CODE (basetype) == TYPE_DECL)
9961 basetype = TREE_TYPE (basetype);
9962 if (TREE_CODE (basetype) != RECORD_TYPE
9963 && TREE_CODE (basetype) != TYPENAME_TYPE
9964 && TREE_CODE (basetype) != TEMPLATE_TYPE_PARM
9965 && TREE_CODE (basetype) != BOUND_TEMPLATE_TEMPLATE_PARM)
9967 error ("base type %qT fails to be a struct or class type",
9972 if (TYPE_FOR_JAVA (basetype) && (current_lang_depth () == 0))
9973 TYPE_FOR_JAVA (ref) = 1;
9975 base_binfo = NULL_TREE;
9976 if (CLASS_TYPE_P (basetype) && !dependent_type_p (basetype))
9978 base_binfo = TYPE_BINFO (basetype);
9979 /* The original basetype could have been a typedef'd type. */
9980 basetype = BINFO_TYPE (base_binfo);
9982 /* Inherit flags from the base. */
9983 TYPE_HAS_NEW_OPERATOR (ref)
9984 |= TYPE_HAS_NEW_OPERATOR (basetype);
9985 TYPE_HAS_ARRAY_NEW_OPERATOR (ref)
9986 |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype);
9987 TYPE_GETS_DELETE (ref) |= TYPE_GETS_DELETE (basetype);
9988 TYPE_HAS_CONVERSION (ref) |= TYPE_HAS_CONVERSION (basetype);
9989 CLASSTYPE_DIAMOND_SHAPED_P (ref)
9990 |= CLASSTYPE_DIAMOND_SHAPED_P (basetype);
9991 CLASSTYPE_REPEATED_BASE_P (ref)
9992 |= CLASSTYPE_REPEATED_BASE_P (basetype);
9995 /* We must do this test after we've seen through a typedef
9997 if (TYPE_MARKED_P (basetype))
9999 if (basetype == ref)
10000 error ("recursive type %qT undefined", basetype);
10002 error ("duplicate base type %qT invalid", basetype);
10006 if (PACK_EXPANSION_P (TREE_VALUE (base_list)))
10007 /* Regenerate the pack expansion for the bases. */
10008 basetype = make_pack_expansion (basetype);
10010 TYPE_MARKED_P (basetype) = 1;
10012 base_binfo = copy_binfo (base_binfo, basetype, ref,
10013 &igo_prev, via_virtual);
10014 if (!BINFO_INHERITANCE_CHAIN (base_binfo))
10015 BINFO_INHERITANCE_CHAIN (base_binfo) = binfo;
10017 BINFO_BASE_APPEND (binfo, base_binfo);
10018 BINFO_BASE_ACCESS_APPEND (binfo, access);
10021 if (VEC_space (tree, CLASSTYPE_VBASECLASSES (ref), 1))
10022 /* If we have space in the vbase vector, we must have shared at
10023 least one of them, and are therefore diamond shaped. */
10024 CLASSTYPE_DIAMOND_SHAPED_P (ref) = 1;
10026 /* Unmark all the types. */
10027 for (i = 0; BINFO_BASE_ITERATE (binfo, i, base_binfo); i++)
10028 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
10029 TYPE_MARKED_P (ref) = 0;
10031 /* Now see if we have a repeated base type. */
10032 if (!CLASSTYPE_REPEATED_BASE_P (ref))
10034 for (base_binfo = binfo; base_binfo;
10035 base_binfo = TREE_CHAIN (base_binfo))
10037 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
10039 CLASSTYPE_REPEATED_BASE_P (ref) = 1;
10042 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 1;
10044 for (base_binfo = binfo; base_binfo;
10045 base_binfo = TREE_CHAIN (base_binfo))
10046 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
10047 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
10056 /* Begin compiling the definition of an enumeration type.
10058 Returns the type object, as yet incomplete.
10059 Also records info about it so that build_enumerator
10060 may be used to declare the individual values as they are read. */
10063 start_enum (tree name)
10067 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
10069 /* If this is the real definition for a previous forward reference,
10070 fill in the contents in the same object that used to be the
10071 forward reference. */
10073 enumtype = lookup_and_check_tag (enum_type, name,
10074 /*tag_scope=*/ts_current,
10075 /*template_header_p=*/false);
10077 if (enumtype != NULL_TREE && TREE_CODE (enumtype) == ENUMERAL_TYPE)
10079 error ("multiple definition of %q#T", enumtype);
10080 error ("%Jprevious definition here", TYPE_MAIN_DECL (enumtype));
10081 /* Clear out TYPE_VALUES, and start again. */
10082 TYPE_VALUES (enumtype) = NULL_TREE;
10086 /* In case of error, make a dummy enum to allow parsing to
10088 if (enumtype == error_mark_node)
10089 name = make_anon_name ();
10091 enumtype = make_node (ENUMERAL_TYPE);
10092 enumtype = pushtag (name, enumtype, /*tag_scope=*/ts_current);
10098 /* After processing and defining all the values of an enumeration type,
10099 install their decls in the enumeration type and finish it off.
10100 ENUMTYPE is the type object and VALUES a list of name-value pairs. */
10103 finish_enum (tree enumtype)
10112 bool use_short_enum;
10116 integer_type_kind itk;
10117 tree underlying_type = NULL_TREE;
10119 /* We built up the VALUES in reverse order. */
10120 TYPE_VALUES (enumtype) = nreverse (TYPE_VALUES (enumtype));
10122 /* For an enum defined in a template, just set the type of the values;
10123 all further processing is postponed until the template is
10124 instantiated. We need to set the type so that tsubst of a CONST_DECL
10126 if (processing_template_decl)
10128 for (values = TYPE_VALUES (enumtype);
10130 values = TREE_CHAIN (values))
10131 TREE_TYPE (TREE_VALUE (values)) = enumtype;
10132 if (at_function_scope_p ())
10133 add_stmt (build_min (TAG_DEFN, enumtype));
10137 /* Determine the minimum and maximum values of the enumerators. */
10138 if (TYPE_VALUES (enumtype))
10140 minnode = maxnode = NULL_TREE;
10142 for (values = TYPE_VALUES (enumtype);
10144 values = TREE_CHAIN (values))
10146 decl = TREE_VALUE (values);
10148 /* [dcl.enum]: Following the closing brace of an enum-specifier,
10149 each enumerator has the type of its enumeration. Prior to the
10150 closing brace, the type of each enumerator is the type of its
10151 initializing value. */
10152 TREE_TYPE (decl) = enumtype;
10154 /* Update the minimum and maximum values, if appropriate. */
10155 value = DECL_INITIAL (decl);
10156 if (value == error_mark_node)
10157 value = integer_zero_node;
10158 /* Figure out what the minimum and maximum values of the
10159 enumerators are. */
10161 minnode = maxnode = value;
10162 else if (tree_int_cst_lt (maxnode, value))
10164 else if (tree_int_cst_lt (value, minnode))
10171 If the enumerator-list is empty, the underlying type is as if
10172 the enumeration had a single enumerator with value 0. */
10173 minnode = maxnode = integer_zero_node;
10175 /* Compute the number of bits require to represent all values of the
10176 enumeration. We must do this before the type of MINNODE and
10177 MAXNODE are transformed, since min_precision relies on the
10178 TREE_TYPE of the value it is passed. */
10179 unsignedp = tree_int_cst_sgn (minnode) >= 0;
10180 lowprec = min_precision (minnode, unsignedp);
10181 highprec = min_precision (maxnode, unsignedp);
10182 precision = MAX (lowprec, highprec);
10184 /* Determine the underlying type of the enumeration.
10188 The underlying type of an enumeration is an integral type that
10189 can represent all the enumerator values defined in the
10190 enumeration. It is implementation-defined which integral type is
10191 used as the underlying type for an enumeration except that the
10192 underlying type shall not be larger than int unless the value of
10193 an enumerator cannot fit in an int or unsigned int.
10195 We use "int" or an "unsigned int" as the underlying type, even if
10196 a smaller integral type would work, unless the user has
10197 explicitly requested that we use the smallest possible type. The
10198 user can request that for all enumerations with a command line
10199 flag, or for just one enumeration with an attribute. */
10201 use_short_enum = flag_short_enums
10202 || lookup_attribute ("packed", TYPE_ATTRIBUTES (enumtype));
10204 for (itk = (use_short_enum ? itk_char : itk_int);
10208 underlying_type = integer_types[itk];
10209 if (TYPE_PRECISION (underlying_type) >= precision
10210 && TYPE_UNSIGNED (underlying_type) == unsignedp)
10213 if (itk == itk_none)
10217 IF no integral type can represent all the enumerator values, the
10218 enumeration is ill-formed. */
10219 error ("no integral type can represent all of the enumerator values "
10220 "for %qT", enumtype);
10221 precision = TYPE_PRECISION (long_long_integer_type_node);
10222 underlying_type = integer_types[itk_unsigned_long_long];
10225 /* Compute the minium and maximum values for the type.
10229 For an enumeration where emin is the smallest enumerator and emax
10230 is the largest, the values of the enumeration are the values of the
10231 underlying type in the range bmin to bmax, where bmin and bmax are,
10232 respectively, the smallest and largest values of the smallest bit-
10233 field that can store emin and emax. */
10235 /* The middle-end currently assumes that types with TYPE_PRECISION
10236 narrower than their underlying type are suitably zero or sign
10237 extended to fill their mode. g++ doesn't make these guarantees.
10238 Until the middle-end can represent such paradoxical types, we
10239 set the TYPE_PRECISION to the width of the underlying type. */
10240 TYPE_PRECISION (enumtype) = TYPE_PRECISION (underlying_type);
10242 set_min_and_max_values_for_integral_type (enumtype, precision, unsignedp);
10246 The value of sizeof() applied to an enumeration type, an object
10247 of an enumeration type, or an enumerator, is the value of sizeof()
10248 applied to the underlying type. */
10249 TYPE_SIZE (enumtype) = TYPE_SIZE (underlying_type);
10250 TYPE_SIZE_UNIT (enumtype) = TYPE_SIZE_UNIT (underlying_type);
10251 TYPE_MODE (enumtype) = TYPE_MODE (underlying_type);
10252 TYPE_ALIGN (enumtype) = TYPE_ALIGN (underlying_type);
10253 TYPE_USER_ALIGN (enumtype) = TYPE_USER_ALIGN (underlying_type);
10254 TYPE_UNSIGNED (enumtype) = TYPE_UNSIGNED (underlying_type);
10256 /* Convert each of the enumerators to the type of the underlying
10257 type of the enumeration. */
10258 for (values = TYPE_VALUES (enumtype); values; values = TREE_CHAIN (values))
10260 location_t saved_location;
10262 decl = TREE_VALUE (values);
10263 saved_location = input_location;
10264 input_location = DECL_SOURCE_LOCATION (decl);
10265 value = perform_implicit_conversion (underlying_type,
10266 DECL_INITIAL (decl));
10267 input_location = saved_location;
10269 /* Do not clobber shared ints. */
10270 value = copy_node (value);
10272 TREE_TYPE (value) = enumtype;
10273 DECL_INITIAL (decl) = value;
10274 TREE_VALUE (values) = value;
10277 /* Fix up all variant types of this enum type. */
10278 for (t = TYPE_MAIN_VARIANT (enumtype); t; t = TYPE_NEXT_VARIANT (t))
10280 TYPE_VALUES (t) = TYPE_VALUES (enumtype);
10281 TYPE_MIN_VALUE (t) = TYPE_MIN_VALUE (enumtype);
10282 TYPE_MAX_VALUE (t) = TYPE_MAX_VALUE (enumtype);
10283 TYPE_SIZE (t) = TYPE_SIZE (enumtype);
10284 TYPE_SIZE_UNIT (t) = TYPE_SIZE_UNIT (enumtype);
10285 TYPE_MODE (t) = TYPE_MODE (enumtype);
10286 TYPE_PRECISION (t) = TYPE_PRECISION (enumtype);
10287 TYPE_ALIGN (t) = TYPE_ALIGN (enumtype);
10288 TYPE_USER_ALIGN (t) = TYPE_USER_ALIGN (enumtype);
10289 TYPE_UNSIGNED (t) = TYPE_UNSIGNED (enumtype);
10292 /* Finish debugging output for this type. */
10293 rest_of_type_compilation (enumtype, namespace_bindings_p ());
10296 /* Build and install a CONST_DECL for an enumeration constant of the
10297 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
10298 Assignment of sequential values by default is handled here. */
10301 build_enumerator (tree name, tree value, tree enumtype)
10307 /* If the VALUE was erroneous, pretend it wasn't there; that will
10308 result in the enum being assigned the next value in sequence. */
10309 if (value == error_mark_node)
10312 /* Remove no-op casts from the value. */
10314 STRIP_TYPE_NOPS (value);
10316 if (! processing_template_decl)
10318 /* Validate and default VALUE. */
10319 if (value != NULL_TREE)
10321 value = integral_constant_value (value);
10323 if (TREE_CODE (value) == INTEGER_CST)
10325 value = perform_integral_promotions (value);
10326 constant_expression_warning (value);
10330 error ("enumerator value for %qD is not an integer constant", name);
10335 /* Default based on previous value. */
10336 if (value == NULL_TREE)
10338 if (TYPE_VALUES (enumtype))
10341 unsigned HOST_WIDE_INT lo;
10345 /* The next value is the previous value plus one. We can
10346 safely assume that the previous value is an INTEGER_CST.
10347 add_double doesn't know the type of the target expression,
10348 so we must check with int_fits_type_p as well. */
10349 prev_value = DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype)));
10350 overflowed = add_double (TREE_INT_CST_LOW (prev_value),
10351 TREE_INT_CST_HIGH (prev_value),
10353 value = build_int_cst_wide (TREE_TYPE (prev_value), lo, hi);
10354 overflowed |= !int_fits_type_p (value, TREE_TYPE (prev_value));
10358 error ("overflow in enumeration values at %qD", name);
10359 value = error_mark_node;
10363 value = integer_zero_node;
10366 /* Remove no-op casts from the value. */
10367 STRIP_TYPE_NOPS (value);
10370 /* C++ associates enums with global, function, or class declarations. */
10371 context = current_scope ();
10373 /* Build the actual enumeration constant. Note that the enumeration
10374 constants have the type of their initializers until the
10375 enumeration is complete:
10379 Following the closing brace of an enum-specifier, each enumer-
10380 ator has the type of its enumeration. Prior to the closing
10381 brace, the type of each enumerator is the type of its
10382 initializing value.
10384 In finish_enum we will reset the type. Of course, if we're
10385 processing a template, there may be no value. */
10386 type = value ? TREE_TYPE (value) : NULL_TREE;
10388 if (context && context == current_class_type)
10389 /* This enum declaration is local to the class. We need the full
10390 lang_decl so that we can record DECL_CLASS_CONTEXT, for example. */
10391 decl = build_lang_decl (CONST_DECL, name, type);
10393 /* It's a global enum, or it's local to a function. (Note local to
10394 a function could mean local to a class method. */
10395 decl = build_decl (CONST_DECL, name, type);
10397 DECL_CONTEXT (decl) = FROB_CONTEXT (context);
10398 TREE_CONSTANT (decl) = 1;
10399 TREE_INVARIANT (decl) = 1;
10400 TREE_READONLY (decl) = 1;
10401 DECL_INITIAL (decl) = value;
10403 if (context && context == current_class_type)
10404 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
10405 on the TYPE_FIELDS list for `S'. (That's so that you can say
10406 things like `S::i' later.) */
10407 finish_member_declaration (decl);
10411 /* Add this enumeration constant to the list for this type. */
10412 TYPE_VALUES (enumtype) = tree_cons (name, decl, TYPE_VALUES (enumtype));
10416 /* We're defining DECL. Make sure that it's type is OK. */
10419 check_function_type (tree decl, tree current_function_parms)
10421 tree fntype = TREE_TYPE (decl);
10422 tree return_type = complete_type (TREE_TYPE (fntype));
10424 /* In a function definition, arg types must be complete. */
10425 require_complete_types_for_parms (current_function_parms);
10427 if (dependent_type_p (return_type))
10429 if (!COMPLETE_OR_VOID_TYPE_P (return_type))
10431 tree args = TYPE_ARG_TYPES (fntype);
10433 error ("return type %q#T is incomplete", return_type);
10435 /* Make it return void instead. */
10436 if (TREE_CODE (fntype) == METHOD_TYPE)
10437 fntype = build_method_type_directly (TREE_TYPE (TREE_VALUE (args)),
10439 TREE_CHAIN (args));
10441 fntype = build_function_type (void_type_node, args);
10443 = build_exception_variant (fntype,
10444 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (decl)));
10447 abstract_virtuals_error (decl, TREE_TYPE (fntype));
10450 /* Create the FUNCTION_DECL for a function definition.
10451 DECLSPECS and DECLARATOR are the parts of the declaration;
10452 they describe the function's name and the type it returns,
10453 but twisted together in a fashion that parallels the syntax of C.
10455 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
10456 DECLARATOR is really the DECL for the function we are about to
10457 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
10458 indicating that the function is an inline defined in-class.
10460 This function creates a binding context for the function body
10461 as well as setting up the FUNCTION_DECL in current_function_decl.
10463 For C++, we must first check whether that datum makes any sense.
10464 For example, "class A local_a(1,2);" means that variable local_a
10465 is an aggregate of type A, which should have a constructor
10466 applied to it with the argument list [1, 2].
10468 On entry, DECL_INITIAL (decl1) should be NULL_TREE or error_mark_node,
10469 or may be a BLOCK if the function has been defined previously
10470 in this translation unit. On exit, DECL_INITIAL (decl1) will be
10471 error_mark_node if the function has never been defined, or
10472 a BLOCK if the function has been defined somewhere. */
10475 start_preparsed_function (tree decl1, tree attrs, int flags)
10477 tree ctype = NULL_TREE;
10480 int doing_friend = 0;
10481 struct cp_binding_level *bl;
10482 tree current_function_parms;
10483 struct c_fileinfo *finfo
10484 = get_fileinfo (LOCATION_FILE (DECL_SOURCE_LOCATION (decl1)));
10485 bool honor_interface;
10487 /* Sanity check. */
10488 gcc_assert (TREE_CODE (TREE_VALUE (void_list_node)) == VOID_TYPE);
10489 gcc_assert (TREE_CHAIN (void_list_node) == NULL_TREE);
10491 fntype = TREE_TYPE (decl1);
10492 if (TREE_CODE (fntype) == METHOD_TYPE)
10493 ctype = TYPE_METHOD_BASETYPE (fntype);
10495 /* ISO C++ 11.4/5. A friend function defined in a class is in
10496 the (lexical) scope of the class in which it is defined. */
10497 if (!ctype && DECL_FRIEND_P (decl1))
10499 ctype = DECL_FRIEND_CONTEXT (decl1);
10501 /* CTYPE could be null here if we're dealing with a template;
10502 for example, `inline friend float foo()' inside a template
10503 will have no CTYPE set. */
10504 if (ctype && TREE_CODE (ctype) != RECORD_TYPE)
10510 if (DECL_DECLARED_INLINE_P (decl1)
10511 && lookup_attribute ("noinline", attrs))
10512 warning (0, "inline function %q+D given attribute noinline", decl1);
10514 if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1))
10515 /* This is a constructor, we must ensure that any default args
10516 introduced by this definition are propagated to the clones
10517 now. The clones are used directly in overload resolution. */
10518 adjust_clone_args (decl1);
10520 /* Sometimes we don't notice that a function is a static member, and
10521 build a METHOD_TYPE for it. Fix that up now. */
10522 if (ctype != NULL_TREE && DECL_STATIC_FUNCTION_P (decl1)
10523 && TREE_CODE (TREE_TYPE (decl1)) == METHOD_TYPE)
10525 revert_static_member_fn (decl1);
10529 /* Set up current_class_type, and enter the scope of the class, if
10532 push_nested_class (ctype);
10533 else if (DECL_STATIC_FUNCTION_P (decl1))
10534 push_nested_class (DECL_CONTEXT (decl1));
10536 /* Now that we have entered the scope of the class, we must restore
10537 the bindings for any template parameters surrounding DECL1, if it
10538 is an inline member template. (Order is important; consider the
10539 case where a template parameter has the same name as a field of
10540 the class.) It is not until after this point that
10541 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
10542 if (flags & SF_INCLASS_INLINE)
10543 maybe_begin_member_template_processing (decl1);
10545 /* Effective C++ rule 15. */
10547 && DECL_OVERLOADED_OPERATOR_P (decl1) == NOP_EXPR
10548 && TREE_CODE (TREE_TYPE (fntype)) == VOID_TYPE)
10549 warning (OPT_Weffc__, "%<operator=%> should return a reference to %<*this%>");
10551 /* Make the init_value nonzero so pushdecl knows this is not tentative.
10552 error_mark_node is replaced below (in poplevel) with the BLOCK. */
10553 if (!DECL_INITIAL (decl1))
10554 DECL_INITIAL (decl1) = error_mark_node;
10556 /* This function exists in static storage.
10557 (This does not mean `static' in the C sense!) */
10558 TREE_STATIC (decl1) = 1;
10560 /* We must call push_template_decl after current_class_type is set
10561 up. (If we are processing inline definitions after exiting a
10562 class scope, current_class_type will be NULL_TREE until set above
10563 by push_nested_class.) */
10564 if (processing_template_decl)
10566 /* FIXME: Handle error_mark_node more gracefully. */
10567 tree newdecl1 = push_template_decl (decl1);
10568 if (newdecl1 != error_mark_node)
10572 /* We are now in the scope of the function being defined. */
10573 current_function_decl = decl1;
10575 /* Save the parm names or decls from this function's declarator
10576 where store_parm_decls will find them. */
10577 current_function_parms = DECL_ARGUMENTS (decl1);
10579 /* Make sure the parameter and return types are reasonable. When
10580 you declare a function, these types can be incomplete, but they
10581 must be complete when you define the function. */
10582 check_function_type (decl1, current_function_parms);
10584 /* Build the return declaration for the function. */
10585 restype = TREE_TYPE (fntype);
10586 /* Promote the value to int before returning it. */
10587 if (c_promoting_integer_type_p (restype))
10588 restype = type_promotes_to (restype);
10589 if (DECL_RESULT (decl1) == NULL_TREE)
10593 resdecl = build_decl (RESULT_DECL, 0, TYPE_MAIN_VARIANT (restype));
10594 DECL_ARTIFICIAL (resdecl) = 1;
10595 DECL_IGNORED_P (resdecl) = 1;
10596 DECL_RESULT (decl1) = resdecl;
10598 cp_apply_type_quals_to_decl (cp_type_quals (restype), resdecl);
10601 /* Let the user know we're compiling this function. */
10602 announce_function (decl1);
10604 /* Record the decl so that the function name is defined.
10605 If we already have a decl for this name, and it is a FUNCTION_DECL,
10606 use the old decl. */
10607 if (!processing_template_decl && !(flags & SF_PRE_PARSED))
10609 /* A specialization is not used to guide overload resolution. */
10610 if (!DECL_FUNCTION_MEMBER_P (decl1)
10611 && !(DECL_USE_TEMPLATE (decl1) &&
10612 PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl1))))
10614 tree olddecl = pushdecl (decl1);
10616 if (olddecl == error_mark_node)
10617 /* If something went wrong when registering the declaration,
10618 use DECL1; we have to have a FUNCTION_DECL to use when
10619 parsing the body of the function. */
10623 /* Otherwise, OLDDECL is either a previous declaration
10624 of the same function or DECL1 itself. */
10626 if (warn_missing_declarations
10627 && olddecl == decl1
10628 && !DECL_MAIN_P (decl1)
10629 && TREE_PUBLIC (decl1)
10630 && !DECL_DECLARED_INLINE_P (decl1))
10634 /* Check whether DECL1 is in an anonymous
10636 for (context = DECL_CONTEXT (decl1);
10638 context = DECL_CONTEXT (context))
10640 if (TREE_CODE (context) == NAMESPACE_DECL
10641 && DECL_NAME (context) == NULL_TREE)
10645 if (context == NULL)
10646 warning (OPT_Wmissing_declarations,
10647 "no previous declaration for %q+D", decl1);
10655 /* We need to set the DECL_CONTEXT. */
10656 if (!DECL_CONTEXT (decl1) && DECL_TEMPLATE_INFO (decl1))
10657 DECL_CONTEXT (decl1) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1));
10659 fntype = TREE_TYPE (decl1);
10661 /* If #pragma weak applies, mark the decl appropriately now.
10662 The pragma only applies to global functions. Because
10663 determining whether or not the #pragma applies involves
10664 computing the mangled name for the declaration, we cannot
10665 apply the pragma until after we have merged this declaration
10666 with any previous declarations; if the original declaration
10667 has a linkage specification, that specification applies to
10668 the definition as well, and may affect the mangled name. */
10669 if (!DECL_CONTEXT (decl1))
10670 maybe_apply_pragma_weak (decl1);
10673 /* Reset this in case the call to pushdecl changed it. */
10674 current_function_decl = decl1;
10676 gcc_assert (DECL_INITIAL (decl1));
10678 /* This function may already have been parsed, in which case just
10679 return; our caller will skip over the body without parsing. */
10680 if (DECL_INITIAL (decl1) != error_mark_node)
10683 /* Initialize RTL machinery. We cannot do this until
10684 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
10685 even when processing a template; this is how we get
10686 CFUN set up, and our per-function variables initialized.
10687 FIXME factor out the non-RTL stuff. */
10688 bl = current_binding_level;
10689 allocate_struct_function (decl1);
10690 current_binding_level = bl;
10692 /* Even though we're inside a function body, we still don't want to
10693 call expand_expr to calculate the size of a variable-sized array.
10694 We haven't necessarily assigned RTL to all variables yet, so it's
10695 not safe to try to expand expressions involving them. */
10696 cfun->x_dont_save_pending_sizes_p = 1;
10698 /* Start the statement-tree, start the tree now. */
10699 DECL_SAVED_TREE (decl1) = push_stmt_list ();
10701 /* If we are (erroneously) defining a function that we have already
10702 defined before, wipe out what we knew before. */
10703 if (!DECL_PENDING_INLINE_P (decl1))
10704 DECL_SAVED_FUNCTION_DATA (decl1) = NULL;
10706 if (ctype && !doing_friend && !DECL_STATIC_FUNCTION_P (decl1))
10708 /* We know that this was set up by `grokclassfn'. We do not
10709 wait until `store_parm_decls', since evil parse errors may
10710 never get us to that point. Here we keep the consistency
10711 between `current_class_type' and `current_class_ptr'. */
10712 tree t = DECL_ARGUMENTS (decl1);
10714 gcc_assert (t != NULL_TREE && TREE_CODE (t) == PARM_DECL);
10715 gcc_assert (TREE_CODE (TREE_TYPE (t)) == POINTER_TYPE);
10717 cp_function_chain->x_current_class_ref
10718 = build_indirect_ref (t, NULL);
10719 cp_function_chain->x_current_class_ptr = t;
10721 /* Constructors and destructors need to know whether they're "in
10722 charge" of initializing virtual base classes. */
10723 t = TREE_CHAIN (t);
10724 if (DECL_HAS_IN_CHARGE_PARM_P (decl1))
10726 current_in_charge_parm = t;
10727 t = TREE_CHAIN (t);
10729 if (DECL_HAS_VTT_PARM_P (decl1))
10731 gcc_assert (DECL_NAME (t) == vtt_parm_identifier);
10732 current_vtt_parm = t;
10736 honor_interface = (!DECL_TEMPLATE_INSTANTIATION (decl1)
10737 /* Implicitly-defined methods (like the
10738 destructor for a class in which no destructor
10739 is explicitly declared) must not be defined
10740 until their definition is needed. So, we
10741 ignore interface specifications for
10742 compiler-generated functions. */
10743 && !DECL_ARTIFICIAL (decl1));
10745 if (DECL_INTERFACE_KNOWN (decl1))
10747 tree ctx = decl_function_context (decl1);
10749 if (DECL_NOT_REALLY_EXTERN (decl1))
10750 DECL_EXTERNAL (decl1) = 0;
10752 if (ctx != NULL_TREE && DECL_DECLARED_INLINE_P (ctx)
10753 && TREE_PUBLIC (ctx))
10754 /* This is a function in a local class in an extern inline
10756 comdat_linkage (decl1);
10758 /* If this function belongs to an interface, it is public.
10759 If it belongs to someone else's interface, it is also external.
10760 This only affects inlines and template instantiations. */
10761 else if (!finfo->interface_unknown && honor_interface)
10763 if (DECL_DECLARED_INLINE_P (decl1)
10764 || DECL_TEMPLATE_INSTANTIATION (decl1)
10765 || processing_template_decl)
10767 DECL_EXTERNAL (decl1)
10768 = (finfo->interface_only
10769 || (DECL_DECLARED_INLINE_P (decl1)
10770 && ! flag_implement_inlines
10771 && !DECL_VINDEX (decl1)));
10773 /* For WIN32 we also want to put these in linkonce sections. */
10774 maybe_make_one_only (decl1);
10777 DECL_EXTERNAL (decl1) = 0;
10778 DECL_INTERFACE_KNOWN (decl1) = 1;
10779 /* If this function is in an interface implemented in this file,
10780 make sure that the back end knows to emit this function
10782 if (!DECL_EXTERNAL (decl1))
10783 mark_needed (decl1);
10785 else if (finfo->interface_unknown && finfo->interface_only
10786 && honor_interface)
10788 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
10789 interface, we will have both finfo->interface_unknown and
10790 finfo->interface_only set. In that case, we don't want to
10791 use the normal heuristics because someone will supply a
10792 #pragma implementation elsewhere, and deducing it here would
10793 produce a conflict. */
10794 comdat_linkage (decl1);
10795 DECL_EXTERNAL (decl1) = 0;
10796 DECL_INTERFACE_KNOWN (decl1) = 1;
10797 DECL_DEFER_OUTPUT (decl1) = 1;
10801 /* This is a definition, not a reference.
10802 So clear DECL_EXTERNAL. */
10803 DECL_EXTERNAL (decl1) = 0;
10805 if ((DECL_DECLARED_INLINE_P (decl1)
10806 || DECL_TEMPLATE_INSTANTIATION (decl1))
10807 && ! DECL_INTERFACE_KNOWN (decl1)
10808 /* Don't try to defer nested functions for now. */
10809 && ! decl_function_context (decl1))
10810 DECL_DEFER_OUTPUT (decl1) = 1;
10812 DECL_INTERFACE_KNOWN (decl1) = 1;
10815 /* Determine the ELF visibility attribute for the function. We must not
10816 do this before calling "pushdecl", as we must allow "duplicate_decls"
10817 to merge any attributes appropriately. We also need to wait until
10819 if (!DECL_CLONED_FUNCTION_P (decl1))
10820 determine_visibility (decl1);
10822 begin_scope (sk_function_parms, decl1);
10826 if (DECL_DESTRUCTOR_P (decl1)
10827 || (DECL_CONSTRUCTOR_P (decl1)
10828 && targetm.cxx.cdtor_returns_this ()))
10830 cdtor_label = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
10831 DECL_CONTEXT (cdtor_label) = current_function_decl;
10834 start_fname_decls ();
10836 store_parm_decls (current_function_parms);
10840 /* Like start_preparsed_function, except that instead of a
10841 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
10843 Returns 1 on success. If the DECLARATOR is not suitable for a function
10844 (it defines a datum instead), we return 0, which tells
10845 yyparse to report a parse error. */
10848 start_function (cp_decl_specifier_seq *declspecs,
10849 const cp_declarator *declarator,
10854 decl1 = grokdeclarator (declarator, declspecs, FUNCDEF, 1, &attrs);
10855 /* If the declarator is not suitable for a function definition,
10856 cause a syntax error. */
10857 if (decl1 == NULL_TREE || TREE_CODE (decl1) != FUNCTION_DECL)
10860 if (DECL_MAIN_P (decl1))
10861 /* main must return int. grokfndecl should have corrected it
10862 (and issued a diagnostic) if the user got it wrong. */
10863 gcc_assert (same_type_p (TREE_TYPE (TREE_TYPE (decl1)),
10864 integer_type_node));
10866 start_preparsed_function (decl1, attrs, /*flags=*/SF_DEFAULT);
10871 /* Returns true iff an EH_SPEC_BLOCK should be created in the body of
10875 use_eh_spec_block (tree fn)
10877 return (flag_exceptions && flag_enforce_eh_specs
10878 && !processing_template_decl
10879 && TYPE_RAISES_EXCEPTIONS (TREE_TYPE (fn))
10880 /* We insert the EH_SPEC_BLOCK only in the original
10881 function; then, it is copied automatically to the
10883 && !DECL_CLONED_FUNCTION_P (fn)
10884 /* Implicitly-generated constructors and destructors have
10885 exception specifications. However, those specifications
10886 are the union of the possible exceptions specified by the
10887 constructors/destructors for bases and members, so no
10888 unallowed exception will ever reach this function. By
10889 not creating the EH_SPEC_BLOCK we save a little memory,
10890 and we avoid spurious warnings about unreachable
10892 && !DECL_ARTIFICIAL (fn));
10895 /* Store the parameter declarations into the current function declaration.
10896 This is called after parsing the parameter declarations, before
10897 digesting the body of the function.
10899 Also install to binding contour return value identifier, if any. */
10902 store_parm_decls (tree current_function_parms)
10904 tree fndecl = current_function_decl;
10907 /* This is a chain of any other decls that came in among the parm
10908 declarations. If a parm is declared with enum {foo, bar} x;
10909 then CONST_DECLs for foo and bar are put here. */
10910 tree nonparms = NULL_TREE;
10912 if (current_function_parms)
10914 /* This case is when the function was defined with an ANSI prototype.
10915 The parms already have decls, so we need not do anything here
10916 except record them as in effect
10917 and complain if any redundant old-style parm decls were written. */
10919 tree specparms = current_function_parms;
10922 /* Must clear this because it might contain TYPE_DECLs declared
10924 current_binding_level->names = NULL;
10926 /* If we're doing semantic analysis, then we'll call pushdecl
10927 for each of these. We must do them in reverse order so that
10928 they end in the correct forward order. */
10929 specparms = nreverse (specparms);
10931 for (parm = specparms; parm; parm = next)
10933 next = TREE_CHAIN (parm);
10934 if (TREE_CODE (parm) == PARM_DECL)
10936 if (DECL_NAME (parm) == NULL_TREE
10937 || TREE_CODE (parm) != VOID_TYPE)
10940 error ("parameter %qD declared void", parm);
10944 /* If we find an enum constant or a type tag,
10945 put it aside for the moment. */
10946 TREE_CHAIN (parm) = NULL_TREE;
10947 nonparms = chainon (nonparms, parm);
10951 /* Get the decls in their original chain order and record in the
10952 function. This is all and only the PARM_DECLs that were
10953 pushed into scope by the loop above. */
10954 DECL_ARGUMENTS (fndecl) = getdecls ();
10957 DECL_ARGUMENTS (fndecl) = NULL_TREE;
10959 /* Now store the final chain of decls for the arguments
10960 as the decl-chain of the current lexical scope.
10961 Put the enumerators in as well, at the front so that
10962 DECL_ARGUMENTS is not modified. */
10963 current_binding_level->names = chainon (nonparms, DECL_ARGUMENTS (fndecl));
10965 if (use_eh_spec_block (current_function_decl))
10966 current_eh_spec_block = begin_eh_spec_block ();
10970 /* We have finished doing semantic analysis on DECL, but have not yet
10971 generated RTL for its body. Save away our current state, so that
10972 when we want to generate RTL later we know what to do. */
10975 save_function_data (tree decl)
10977 struct language_function *f;
10979 /* Save the language-specific per-function data so that we can
10980 get it back when we really expand this function. */
10981 gcc_assert (!DECL_PENDING_INLINE_P (decl));
10984 f = GGC_NEW (struct language_function);
10985 memcpy (f, cp_function_chain, sizeof (struct language_function));
10986 DECL_SAVED_FUNCTION_DATA (decl) = f;
10988 /* Clear out the bits we don't need. */
10989 f->base.x_stmt_tree.x_cur_stmt_list = NULL_TREE;
10990 f->bindings = NULL;
10991 f->x_local_names = NULL;
10995 /* Set the return value of the constructor (if present). */
10998 finish_constructor_body (void)
11003 if (targetm.cxx.cdtor_returns_this ())
11005 /* Any return from a constructor will end up here. */
11006 add_stmt (build_stmt (LABEL_EXPR, cdtor_label));
11008 val = DECL_ARGUMENTS (current_function_decl);
11009 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
11010 DECL_RESULT (current_function_decl), val);
11011 /* Return the address of the object. */
11012 exprstmt = build_stmt (RETURN_EXPR, val);
11013 add_stmt (exprstmt);
11017 /* Do all the processing for the beginning of a destructor; set up the
11018 vtable pointers and cleanups for bases and members. */
11021 begin_destructor_body (void)
11023 tree compound_stmt;
11025 /* If the CURRENT_CLASS_TYPE is incomplete, we will have already
11026 issued an error message. We still want to try to process the
11027 body of the function, but initialize_vtbl_ptrs will crash if
11028 TYPE_BINFO is NULL. */
11029 if (COMPLETE_TYPE_P (current_class_type))
11031 compound_stmt = begin_compound_stmt (0);
11032 /* Make all virtual function table pointers in non-virtual base
11033 classes point to CURRENT_CLASS_TYPE's virtual function
11035 initialize_vtbl_ptrs (current_class_ptr);
11036 finish_compound_stmt (compound_stmt);
11038 /* And insert cleanups for our bases and members so that they
11039 will be properly destroyed if we throw. */
11040 push_base_cleanups ();
11044 /* At the end of every destructor we generate code to delete the object if
11045 necessary. Do that now. */
11048 finish_destructor_body (void)
11052 /* Any return from a destructor will end up here; that way all base
11053 and member cleanups will be run when the function returns. */
11054 add_stmt (build_stmt (LABEL_EXPR, cdtor_label));
11056 /* In a virtual destructor, we must call delete. */
11057 if (DECL_VIRTUAL_P (current_function_decl))
11060 tree virtual_size = cxx_sizeof (current_class_type);
11064 At the point of definition of a virtual destructor (including
11065 an implicit definition), non-placement operator delete shall
11066 be looked up in the scope of the destructor's class and if
11067 found shall be accessible and unambiguous. */
11068 exprstmt = build_op_delete_call(DELETE_EXPR, current_class_ptr,
11070 /*global_p=*/false,
11071 /*placement=*/NULL_TREE,
11072 /*alloc_fn=*/NULL_TREE);
11074 if_stmt = begin_if_stmt ();
11075 finish_if_stmt_cond (build2 (BIT_AND_EXPR, integer_type_node,
11076 current_in_charge_parm,
11079 finish_expr_stmt (exprstmt);
11080 finish_then_clause (if_stmt);
11081 finish_if_stmt (if_stmt);
11084 if (targetm.cxx.cdtor_returns_this ())
11088 val = DECL_ARGUMENTS (current_function_decl);
11089 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
11090 DECL_RESULT (current_function_decl), val);
11091 /* Return the address of the object. */
11092 exprstmt = build_stmt (RETURN_EXPR, val);
11093 add_stmt (exprstmt);
11097 /* Do the necessary processing for the beginning of a function body, which
11098 in this case includes member-initializers, but not the catch clauses of
11099 a function-try-block. Currently, this means opening a binding level
11100 for the member-initializers (in a ctor) and member cleanups (in a dtor). */
11103 begin_function_body (void)
11107 if (! FUNCTION_NEEDS_BODY_BLOCK (current_function_decl))
11110 if (processing_template_decl)
11111 /* Do nothing now. */;
11113 /* Always keep the BLOCK node associated with the outermost pair of
11114 curly braces of a function. These are needed for correct
11115 operation of dwarfout.c. */
11116 keep_next_level (true);
11118 stmt = begin_compound_stmt (BCS_FN_BODY);
11120 if (processing_template_decl)
11121 /* Do nothing now. */;
11122 else if (DECL_DESTRUCTOR_P (current_function_decl))
11123 begin_destructor_body ();
11128 /* Do the processing for the end of a function body. Currently, this means
11129 closing out the cleanups for fully-constructed bases and members, and in
11130 the case of the destructor, deleting the object if desired. Again, this
11131 is only meaningful for [cd]tors, since they are the only functions where
11132 there is a significant distinction between the main body and any
11133 function catch clauses. Handling, say, main() return semantics here
11134 would be wrong, as flowing off the end of a function catch clause for
11135 main() would also need to return 0. */
11138 finish_function_body (tree compstmt)
11140 if (compstmt == NULL_TREE)
11143 /* Close the block. */
11144 finish_compound_stmt (compstmt);
11146 if (processing_template_decl)
11147 /* Do nothing now. */;
11148 else if (DECL_CONSTRUCTOR_P (current_function_decl))
11149 finish_constructor_body ();
11150 else if (DECL_DESTRUCTOR_P (current_function_decl))
11151 finish_destructor_body ();
11154 /* Given a function, returns the BLOCK corresponding to the outermost level
11155 of curly braces, skipping the artificial block created for constructor
11159 outer_curly_brace_block (tree fndecl)
11161 tree block = BLOCK_SUBBLOCKS (DECL_INITIAL (fndecl));
11162 if (FUNCTION_NEEDS_BODY_BLOCK (current_function_decl))
11163 /* Skip the artificial function body block. */
11164 block = BLOCK_SUBBLOCKS (block);
11168 /* Finish up a function declaration and compile that function
11169 all the way to assembler language output. The free the storage
11170 for the function definition.
11172 FLAGS is a bitwise or of the following values:
11174 We just finished processing the body of an in-class inline
11175 function definition. (This processing will have taken place
11176 after the class definition is complete.) */
11179 finish_function (int flags)
11181 tree fndecl = current_function_decl;
11182 tree fntype, ctype = NULL_TREE;
11183 int inclass_inline = (flags & 2) != 0;
11186 /* When we get some parse errors, we can end up without a
11187 current_function_decl, so cope. */
11188 if (fndecl == NULL_TREE)
11189 return error_mark_node;
11191 if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fndecl)
11192 && DECL_VIRTUAL_P (fndecl)
11193 && !processing_template_decl)
11195 tree fnclass = DECL_CONTEXT (fndecl);
11196 if (fndecl == CLASSTYPE_KEY_METHOD (fnclass))
11197 keyed_classes = tree_cons (NULL_TREE, fnclass, keyed_classes);
11200 nested = function_depth > 1;
11201 fntype = TREE_TYPE (fndecl);
11203 /* TREE_READONLY (fndecl) = 1;
11204 This caused &foo to be of type ptr-to-const-function
11205 which then got a warning when stored in a ptr-to-function variable. */
11207 gcc_assert (building_stmt_tree ());
11208 /* The current function is being defined, so its DECL_INITIAL should
11209 be set, and unless there's a multiple definition, it should be
11210 error_mark_node. */
11211 gcc_assert (DECL_INITIAL (fndecl) == error_mark_node);
11213 /* For a cloned function, we've already got all the code we need;
11214 there's no need to add any extra bits. */
11215 if (!DECL_CLONED_FUNCTION_P (fndecl))
11217 if (DECL_MAIN_P (current_function_decl))
11221 /* Make it so that `main' always returns 0 by default (or
11224 stmt = finish_return_stmt (integer_one_node);
11226 stmt = finish_return_stmt (integer_zero_node);
11228 /* Hack. We don't want the middle-end to warn that this
11229 return is unreachable, so put the statement on the
11231 #ifdef USE_MAPPED_LOCATION
11232 SET_EXPR_LOCATION (stmt, UNKNOWN_LOCATION);
11234 annotate_with_file_line (stmt, input_filename, 0);
11238 if (use_eh_spec_block (current_function_decl))
11239 finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
11240 (TREE_TYPE (current_function_decl)),
11241 current_eh_spec_block);
11244 /* If we're saving up tree structure, tie off the function now. */
11245 DECL_SAVED_TREE (fndecl) = pop_stmt_list (DECL_SAVED_TREE (fndecl));
11247 finish_fname_decls ();
11249 /* If this function can't throw any exceptions, remember that. */
11250 if (!processing_template_decl
11251 && !cp_function_chain->can_throw
11252 && !flag_non_call_exceptions
11253 && !DECL_REPLACEABLE_P (fndecl))
11254 TREE_NOTHROW (fndecl) = 1;
11256 /* This must come after expand_function_end because cleanups might
11257 have declarations (from inline functions) that need to go into
11258 this function's blocks. */
11260 /* If the current binding level isn't the outermost binding level
11261 for this function, either there is a bug, or we have experienced
11262 syntax errors and the statement tree is malformed. */
11263 if (current_binding_level->kind != sk_function_parms)
11265 /* Make sure we have already experienced errors. */
11266 gcc_assert (errorcount);
11268 /* Throw away the broken statement tree and extra binding
11270 DECL_SAVED_TREE (fndecl) = alloc_stmt_list ();
11272 while (current_binding_level->kind != sk_function_parms)
11274 if (current_binding_level->kind == sk_class)
11275 pop_nested_class ();
11277 poplevel (0, 0, 0);
11280 poplevel (1, 0, 1);
11282 /* Statements should always be full-expressions at the outermost set
11283 of curly braces for a function. */
11284 gcc_assert (stmts_are_full_exprs_p ());
11286 /* Set up the named return value optimization, if we can. Candidate
11287 variables are selected in check_return_value. */
11288 if (current_function_return_value)
11290 tree r = current_function_return_value;
11293 if (r != error_mark_node
11294 /* This is only worth doing for fns that return in memory--and
11295 simpler, since we don't have to worry about promoted modes. */
11296 && aggregate_value_p (TREE_TYPE (TREE_TYPE (fndecl)), fndecl)
11297 /* Only allow this for variables declared in the outer scope of
11298 the function so we know that their lifetime always ends with a
11299 return; see g++.dg/opt/nrv6.C. We could be more flexible if
11300 we were to do this optimization in tree-ssa. */
11301 && (outer = outer_curly_brace_block (fndecl))
11302 && chain_member (r, BLOCK_VARS (outer)))
11303 finalize_nrv (&DECL_SAVED_TREE (fndecl), r, DECL_RESULT (fndecl));
11305 current_function_return_value = NULL_TREE;
11308 /* Remember that we were in class scope. */
11309 if (current_class_name)
11310 ctype = current_class_type;
11312 /* Must mark the RESULT_DECL as being in this function. */
11313 DECL_CONTEXT (DECL_RESULT (fndecl)) = fndecl;
11315 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
11316 to the FUNCTION_DECL node itself. */
11317 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl)) = fndecl;
11319 /* Save away current state, if appropriate. */
11320 if (!processing_template_decl)
11321 save_function_data (fndecl);
11323 /* Complain if there's just no return statement. */
11324 if (warn_return_type
11325 && TREE_CODE (TREE_TYPE (fntype)) != VOID_TYPE
11326 && !dependent_type_p (TREE_TYPE (fntype))
11327 && !current_function_returns_value && !current_function_returns_null
11328 /* Don't complain if we abort or throw. */
11329 && !current_function_returns_abnormally
11330 && !DECL_NAME (DECL_RESULT (fndecl))
11331 /* Normally, with -Wreturn-type, flow will complain. Unless we're an
11332 inline function, as we might never be compiled separately. */
11333 && (DECL_INLINE (fndecl) || processing_template_decl)
11334 /* Structor return values (if any) are set by the compiler. */
11335 && !DECL_CONSTRUCTOR_P (fndecl)
11336 && !DECL_DESTRUCTOR_P (fndecl))
11337 warning (OPT_Wreturn_type, "no return statement in function returning non-void");
11339 /* Store the end of the function, so that we get good line number
11340 info for the epilogue. */
11341 cfun->function_end_locus = input_location;
11343 /* Genericize before inlining. */
11344 if (!processing_template_decl)
11346 struct language_function *f = DECL_SAVED_FUNCTION_DATA (fndecl);
11347 cp_genericize (fndecl);
11348 /* Clear out the bits we don't need. */
11349 f->x_current_class_ptr = NULL;
11350 f->x_current_class_ref = NULL;
11351 f->x_eh_spec_block = NULL;
11352 f->x_in_charge_parm = NULL;
11353 f->x_vtt_parm = NULL;
11354 f->x_return_value = NULL;
11355 f->bindings = NULL;
11356 f->extern_decl_map = NULL;
11358 /* Handle attribute((warn_unused_result)). Relies on gimple input. */
11359 c_warn_unused_result (&DECL_SAVED_TREE (fndecl));
11361 /* Clear out the bits we don't need. */
11362 local_names = NULL;
11364 /* We're leaving the context of this function, so zap cfun. It's still in
11365 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
11367 current_function_decl = NULL;
11369 /* If this is an in-class inline definition, we may have to pop the
11370 bindings for the template parameters that we added in
11371 maybe_begin_member_template_processing when start_function was
11373 if (inclass_inline)
11374 maybe_end_member_template_processing ();
11376 /* Leave the scope of the class. */
11378 pop_nested_class ();
11384 /* Let the error reporting routines know that we're outside a
11385 function. For a nested function, this value is used in
11386 cxx_pop_function_context and then reset via pop_function_context. */
11387 current_function_decl = NULL_TREE;
11392 /* Create the FUNCTION_DECL for a function definition.
11393 DECLSPECS and DECLARATOR are the parts of the declaration;
11394 they describe the return type and the name of the function,
11395 but twisted together in a fashion that parallels the syntax of C.
11397 This function creates a binding context for the function body
11398 as well as setting up the FUNCTION_DECL in current_function_decl.
11400 Returns a FUNCTION_DECL on success.
11402 If the DECLARATOR is not suitable for a function (it defines a datum
11403 instead), we return 0, which tells yyparse to report a parse error.
11405 May return void_type_node indicating that this method is actually
11406 a friend. See grokfield for more details.
11408 Came here with a `.pushlevel' .
11410 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
11411 CHANGES TO CODE IN `grokfield'. */
11414 start_method (cp_decl_specifier_seq *declspecs,
11415 const cp_declarator *declarator, tree attrlist)
11417 tree fndecl = grokdeclarator (declarator, declspecs, MEMFUNCDEF, 0,
11420 if (fndecl == error_mark_node)
11421 return error_mark_node;
11423 if (fndecl == NULL || TREE_CODE (fndecl) != FUNCTION_DECL)
11425 error ("invalid member function declaration");
11426 return error_mark_node;
11430 cplus_decl_attributes (&fndecl, attrlist, 0);
11432 /* Pass friends other than inline friend functions back. */
11433 if (fndecl == void_type_node)
11436 if (DECL_IN_AGGR_P (fndecl))
11438 if (DECL_CONTEXT (fndecl)
11439 && TREE_CODE (DECL_CONTEXT (fndecl)) != NAMESPACE_DECL)
11440 error ("%qD is already defined in class %qT", fndecl,
11441 DECL_CONTEXT (fndecl));
11442 return error_mark_node;
11445 check_template_shadow (fndecl);
11447 DECL_DECLARED_INLINE_P (fndecl) = 1;
11448 if (flag_default_inline)
11449 DECL_INLINE (fndecl) = 1;
11451 /* We process method specializations in finish_struct_1. */
11452 if (processing_template_decl && !DECL_TEMPLATE_SPECIALIZATION (fndecl))
11454 fndecl = push_template_decl (fndecl);
11455 if (fndecl == error_mark_node)
11459 if (! DECL_FRIEND_P (fndecl))
11461 if (TREE_CHAIN (fndecl))
11463 fndecl = copy_node (fndecl);
11464 TREE_CHAIN (fndecl) = NULL_TREE;
11468 finish_decl (fndecl, NULL_TREE, NULL_TREE);
11470 /* Make a place for the parms. */
11471 begin_scope (sk_function_parms, fndecl);
11473 DECL_IN_AGGR_P (fndecl) = 1;
11477 /* Go through the motions of finishing a function definition.
11478 We don't compile this method until after the whole class has
11481 FINISH_METHOD must return something that looks as though it
11482 came from GROKFIELD (since we are defining a method, after all).
11484 This is called after parsing the body of the function definition.
11485 STMTS is the chain of statements that makes up the function body.
11487 DECL is the ..._DECL that `start_method' provided. */
11490 finish_method (tree decl)
11492 tree fndecl = decl;
11497 if (decl == void_type_node)
11500 old_initial = DECL_INITIAL (fndecl);
11502 /* Undo the level for the parms (from start_method).
11503 This is like poplevel, but it causes nothing to be
11504 saved. Saving information here confuses symbol-table
11505 output routines. Besides, this information will
11506 be correctly output when this method is actually
11509 /* Clear out the meanings of the local variables of this level;
11510 also record in each decl which block it belongs to. */
11512 for (link = current_binding_level->names; link; link = TREE_CHAIN (link))
11514 if (DECL_NAME (link) != NULL_TREE)
11515 pop_binding (DECL_NAME (link), link);
11516 gcc_assert (TREE_CODE (link) != FUNCTION_DECL);
11517 DECL_CONTEXT (link) = NULL_TREE;
11520 poplevel (0, 0, 0);
11522 DECL_INITIAL (fndecl) = old_initial;
11524 /* We used to check if the context of FNDECL was different from
11525 current_class_type as another way to get inside here. This didn't work
11526 for String.cc in libg++. */
11527 if (DECL_FRIEND_P (fndecl))
11529 VEC_safe_push (tree, gc, CLASSTYPE_INLINE_FRIENDS (current_class_type),
11531 decl = void_type_node;
11538 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
11539 we can lay it out later, when and if its type becomes complete. */
11542 maybe_register_incomplete_var (tree var)
11544 gcc_assert (TREE_CODE (var) == VAR_DECL);
11546 /* Keep track of variables with incomplete types. */
11547 if (!processing_template_decl && TREE_TYPE (var) != error_mark_node
11548 && DECL_EXTERNAL (var))
11550 tree inner_type = TREE_TYPE (var);
11552 while (TREE_CODE (inner_type) == ARRAY_TYPE)
11553 inner_type = TREE_TYPE (inner_type);
11554 inner_type = TYPE_MAIN_VARIANT (inner_type);
11556 if ((!COMPLETE_TYPE_P (inner_type) && CLASS_TYPE_P (inner_type))
11557 /* RTTI TD entries are created while defining the type_info. */
11558 || (TYPE_LANG_SPECIFIC (inner_type)
11559 && TYPE_BEING_DEFINED (inner_type)))
11560 incomplete_vars = tree_cons (inner_type, var, incomplete_vars);
11564 /* Called when a class type (given by TYPE) is defined. If there are
11565 any existing VAR_DECLs whose type hsa been completed by this
11566 declaration, update them now. */
11569 complete_vars (tree type)
11571 tree *list = &incomplete_vars;
11573 gcc_assert (CLASS_TYPE_P (type));
11576 if (same_type_p (type, TREE_PURPOSE (*list)))
11578 tree var = TREE_VALUE (*list);
11579 tree type = TREE_TYPE (var);
11580 /* Complete the type of the variable. The VAR_DECL itself
11581 will be laid out in expand_expr. */
11582 complete_type (type);
11583 cp_apply_type_quals_to_decl (cp_type_quals (type), var);
11584 /* Remove this entry from the list. */
11585 *list = TREE_CHAIN (*list);
11588 list = &TREE_CHAIN (*list);
11591 /* Check for pending declarations which may have abstract type. */
11592 complete_type_check_abstract (type);
11595 /* If DECL is of a type which needs a cleanup, build that cleanup
11599 cxx_maybe_build_cleanup (tree decl)
11601 tree type = TREE_TYPE (decl);
11603 if (type != error_mark_node && TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
11605 int flags = LOOKUP_NORMAL|LOOKUP_DESTRUCTOR;
11607 bool has_vbases = (TREE_CODE (type) == RECORD_TYPE
11608 && CLASSTYPE_VBASECLASSES (type));
11610 if (TREE_CODE (type) == ARRAY_TYPE)
11614 cxx_mark_addressable (decl);
11615 rval = build_unary_op (ADDR_EXPR, decl, 0);
11618 /* Optimize for space over speed here. */
11619 if (!has_vbases || flag_expensive_optimizations)
11620 flags |= LOOKUP_NONVIRTUAL;
11622 rval = build_delete (TREE_TYPE (rval), rval,
11623 sfk_complete_destructor, flags, 0);
11630 /* When a stmt has been parsed, this function is called. */
11637 /* DECL was originally constructed as a non-static member function,
11638 but turned out to be static. Update it accordingly. */
11641 revert_static_member_fn (tree decl)
11644 tree function = TREE_TYPE (decl);
11645 tree args = TYPE_ARG_TYPES (function);
11647 if (cp_type_quals (TREE_TYPE (TREE_VALUE (args)))
11648 != TYPE_UNQUALIFIED)
11649 error ("static member function %q#D declared with type qualifiers", decl);
11651 args = TREE_CHAIN (args);
11652 tmp = build_function_type (TREE_TYPE (function), args);
11653 tmp = build_qualified_type (tmp, cp_type_quals (function));
11654 tmp = build_exception_variant (tmp,
11655 TYPE_RAISES_EXCEPTIONS (function));
11656 TREE_TYPE (decl) = tmp;
11657 if (DECL_ARGUMENTS (decl))
11658 DECL_ARGUMENTS (decl) = TREE_CHAIN (DECL_ARGUMENTS (decl));
11659 DECL_STATIC_FUNCTION_P (decl) = 1;
11662 /* Initialize the variables used during compilation of a C++
11666 cxx_push_function_context (struct function * f)
11668 struct language_function *p = GGC_CNEW (struct language_function);
11671 /* Whenever we start a new function, we destroy temporaries in the
11673 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
11679 if (DECL_SAVED_FUNCTION_DATA (fn))
11681 /* If we already parsed this function, and we're just expanding it
11682 now, restore saved state. */
11683 *cp_function_chain = *DECL_SAVED_FUNCTION_DATA (fn);
11685 /* We don't need the saved data anymore. Unless this is an inline
11686 function; we need the named return value info for
11687 declare_return_variable. */
11688 if (! DECL_INLINE (fn))
11689 DECL_SAVED_FUNCTION_DATA (fn) = NULL;
11694 /* Free the language-specific parts of F, now that we've finished
11695 compiling the function. */
11698 cxx_pop_function_context (struct function * f)
11703 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
11704 one of the language-independent trees. */
11706 enum cp_tree_node_structure_enum
11707 cp_tree_node_structure (union lang_tree_node * t)
11709 switch (TREE_CODE (&t->generic))
11711 case DEFAULT_ARG: return TS_CP_DEFAULT_ARG;
11712 case IDENTIFIER_NODE: return TS_CP_IDENTIFIER;
11713 case OVERLOAD: return TS_CP_OVERLOAD;
11714 case TEMPLATE_PARM_INDEX: return TS_CP_TPI;
11715 case TINST_LEVEL: return TS_CP_TINST_LEVEL;
11716 case PTRMEM_CST: return TS_CP_PTRMEM;
11717 case BASELINK: return TS_CP_BASELINK;
11718 case STATIC_ASSERT: return TS_CP_STATIC_ASSERT;
11719 case ARGUMENT_PACK_SELECT: return TS_CP_ARGUMENT_PACK_SELECT;
11720 default: return TS_CP_GENERIC;
11724 /* Build the void_list_node (void_type_node having been created). */
11726 build_void_list_node (void)
11728 tree t = build_tree_list (NULL_TREE, void_type_node);
11733 cp_missing_noreturn_ok_p (tree decl)
11735 /* A missing noreturn is ok for the `main' function. */
11736 return DECL_MAIN_P (decl);
11739 /* Return the COMDAT group into which DECL should be placed. */
11742 cxx_comdat_group (tree decl)
11746 /* Virtual tables, construction virtual tables, and virtual table
11747 tables all go in a single COMDAT group, named after the primary
11749 if (TREE_CODE (decl) == VAR_DECL && DECL_VTABLE_OR_VTT_P (decl))
11750 name = DECL_ASSEMBLER_NAME (CLASSTYPE_VTABLES (DECL_CONTEXT (decl)));
11751 /* For all other DECLs, the COMDAT group is the mangled name of the
11752 declaration itself. */
11755 while (DECL_THUNK_P (decl))
11757 /* If TARGET_USE_LOCAL_THUNK_ALIAS_P, use_thunk puts the thunk
11758 into the same section as the target function. In that case
11759 we must return target's name. */
11760 tree target = THUNK_TARGET (decl);
11761 if (TARGET_USE_LOCAL_THUNK_ALIAS_P (target)
11762 && DECL_SECTION_NAME (target) != NULL
11763 && DECL_ONE_ONLY (target))
11768 name = DECL_ASSEMBLER_NAME (decl);
11771 return IDENTIFIER_POINTER (name);
11774 #include "gt-cp-decl.h"