1 /* Process declarations and variables for C++ compiler.
2 Copyright (C) 1988, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
3 2001, 2002, 2003, 2004, 2005, 2006 Free Software Foundation, Inc.
4 Contributed by Michael Tiemann (tiemann@cygnus.com)
6 This file is part of GCC.
8 GCC is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2, or (at your option)
13 GCC is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING. If not, write to
20 the Free Software Foundation, 51 Franklin Street, Fifth Floor,
21 Boston, MA 02110-1301, USA. */
24 /* Process declarations and symbol lookup for C++ front end.
25 Also constructs types; the standard scalar types at initialization,
26 and structure, union, array and enum types when they are declared. */
28 /* ??? not all decl nodes are given the most useful possible
29 line numbers. For example, the CONST_DECLs for enum values. */
33 #include "coretypes.h"
40 #include "tree-inline.h"
50 #include "diagnostic.h"
54 #include "tree-flow.h"
56 static tree grokparms (cp_parameter_declarator *, tree *);
57 static const char *redeclaration_error_message (tree, tree);
59 static int decl_jump_unsafe (tree);
60 static void require_complete_types_for_parms (tree);
61 static int ambi_op_p (enum tree_code);
62 static int unary_op_p (enum tree_code);
63 static void push_local_name (tree);
64 static tree grok_reference_init (tree, tree, tree, tree *);
65 static tree grokvardecl (tree, tree, const cp_decl_specifier_seq *,
67 static void record_unknown_type (tree, const char *);
68 static tree builtin_function_1 (tree, tree);
69 static tree build_library_fn_1 (tree, enum tree_code, tree);
70 static int member_function_or_else (tree, tree, enum overload_flags);
71 static void bad_specifiers (tree, const char *, int, int, int, int,
73 static void check_for_uninitialized_const_var (tree);
74 static hashval_t typename_hash (const void *);
75 static int typename_compare (const void *, const void *);
76 static tree local_variable_p_walkfn (tree *, int *, void *);
77 static tree record_builtin_java_type (const char *, int);
78 static const char *tag_name (enum tag_types);
79 static tree lookup_and_check_tag (enum tag_types, tree, tag_scope, bool);
80 static int walk_namespaces_r (tree, walk_namespaces_fn, void *);
81 static void maybe_deduce_size_from_array_init (tree, tree);
82 static void layout_var_decl (tree);
83 static void maybe_commonize_var (tree);
84 static tree check_initializer (tree, tree, int, tree *);
85 static void make_rtl_for_nonlocal_decl (tree, tree, const char *);
86 static void save_function_data (tree);
87 static void check_function_type (tree, tree);
88 static void finish_constructor_body (void);
89 static void begin_destructor_body (void);
90 static void finish_destructor_body (void);
91 static tree create_array_type_for_decl (tree, tree, tree);
92 static tree get_atexit_node (void);
93 static tree get_dso_handle_node (void);
94 static tree start_cleanup_fn (void);
95 static void end_cleanup_fn (void);
96 static tree cp_make_fname_decl (tree, int);
97 static void initialize_predefined_identifiers (void);
98 static tree check_special_function_return_type
99 (special_function_kind, tree, tree);
100 static tree push_cp_library_fn (enum tree_code, tree);
101 static tree build_cp_library_fn (tree, enum tree_code, tree);
102 static void store_parm_decls (tree);
103 static void initialize_local_var (tree, tree);
104 static void expand_static_init (tree, tree);
105 static tree next_initializable_field (tree);
107 /* The following symbols are subsumed in the cp_global_trees array, and
108 listed here individually for documentation purposes.
111 tree wchar_decl_node;
113 tree vtable_entry_type;
114 tree delta_type_node;
115 tree __t_desc_type_node;
117 tree class_type_node;
118 tree unknown_type_node;
120 Array type `vtable_entry_type[]'
123 tree vtbl_ptr_type_node;
130 A FUNCTION_DECL which can call `abort'. Not necessarily the
131 one that the user will declare, but sufficient to be called
132 by routines that want to abort the program.
136 The FUNCTION_DECL for the default `::operator delete'.
138 tree global_delete_fndecl;
141 tree type_info_type_node, tinfo_decl_id, tinfo_decl_type;
142 tree tinfo_var_id; */
144 tree cp_global_trees[CPTI_MAX];
146 /* Indicates that there is a type value in some namespace, although
147 that is not necessarily in scope at the moment. */
149 tree global_type_node;
151 /* The node that holds the "name" of the global scope. */
152 tree global_scope_name;
154 #define local_names cp_function_chain->x_local_names
156 /* A list of objects which have constructors or destructors
157 which reside in the global scope. The decl is stored in
158 the TREE_VALUE slot and the initializer is stored
159 in the TREE_PURPOSE slot. */
160 tree static_aggregates;
164 /* A node for the integer constants 2, and 3. */
166 tree integer_two_node, integer_three_node;
168 /* Used only for jumps to as-yet undefined labels, since jumps to
169 defined labels can have their validity checked immediately. */
171 struct named_label_use_entry GTY(())
173 struct named_label_use_entry *next;
174 /* The binding level to which this entry is *currently* attached.
175 This is initially the binding level in which the goto appeared,
176 but is modified as scopes are closed. */
177 struct cp_binding_level *binding_level;
178 /* The head of the names list that was current when the goto appeared,
179 or the inner scope popped. These are the decls that will *not* be
180 skipped when jumping to the label. */
182 /* The location of the goto, for error reporting. */
183 location_t o_goto_locus;
184 /* True if an OpenMP structured block scope has been closed since
185 the goto appeared. This means that the branch from the label will
186 illegally exit an OpenMP scope. */
190 /* A list of all LABEL_DECLs in the function that have names. Here so
191 we can clear out their names' definitions at the end of the
192 function, and so we can check the validity of jumps to these labels. */
194 struct named_label_entry GTY(())
196 /* The decl itself. */
199 /* The binding level to which the label is *currently* attached.
200 This is initially set to the binding level in which the label
201 is defined, but is modified as scopes are closed. */
202 struct cp_binding_level *binding_level;
203 /* The head of the names list that was current when the label was
204 defined, or the inner scope popped. These are the decls that will
205 be skipped when jumping to the label. */
207 /* A tree list of all decls from all binding levels that would be
208 crossed by a backward branch to the label. */
211 /* A list of uses of the label, before the label is defined. */
212 struct named_label_use_entry *uses;
214 /* The following bits are set after the label is defined, and are
215 updated as scopes are popped. They indicate that a backward jump
216 to the label will illegally enter a scope of the given flavor. */
222 #define named_labels cp_function_chain->x_named_labels
224 /* The number of function bodies which we are currently processing.
225 (Zero if we are at namespace scope, one inside the body of a
226 function, two inside the body of a function in a local class, etc.) */
229 /* States indicating how grokdeclarator() should handle declspecs marked
230 with __attribute__((deprecated)). An object declared as
231 __attribute__((deprecated)) suppresses warnings of uses of other
234 enum deprecated_states {
239 static enum deprecated_states deprecated_state = DEPRECATED_NORMAL;
242 /* A TREE_LIST of VAR_DECLs. The TREE_PURPOSE is a RECORD_TYPE or
243 UNION_TYPE; the TREE_VALUE is a VAR_DECL with that type. At the
244 time the VAR_DECL was declared, the type was incomplete. */
246 static GTY(()) tree incomplete_vars;
248 /* Returns the kind of template specialization we are currently
249 processing, given that it's declaration contained N_CLASS_SCOPES
250 explicit scope qualifications. */
253 current_tmpl_spec_kind (int n_class_scopes)
255 int n_template_parm_scopes = 0;
256 int seen_specialization_p = 0;
257 int innermost_specialization_p = 0;
258 struct cp_binding_level *b;
260 /* Scan through the template parameter scopes. */
261 for (b = current_binding_level;
262 b->kind == sk_template_parms;
265 /* If we see a specialization scope inside a parameter scope,
266 then something is wrong. That corresponds to a declaration
269 template <class T> template <> ...
271 which is always invalid since [temp.expl.spec] forbids the
272 specialization of a class member template if the enclosing
273 class templates are not explicitly specialized as well. */
274 if (b->explicit_spec_p)
276 if (n_template_parm_scopes == 0)
277 innermost_specialization_p = 1;
279 seen_specialization_p = 1;
281 else if (seen_specialization_p == 1)
282 return tsk_invalid_member_spec;
284 ++n_template_parm_scopes;
287 /* Handle explicit instantiations. */
288 if (processing_explicit_instantiation)
290 if (n_template_parm_scopes != 0)
291 /* We've seen a template parameter list during an explicit
292 instantiation. For example:
294 template <class T> template void f(int);
296 This is erroneous. */
297 return tsk_invalid_expl_inst;
299 return tsk_expl_inst;
302 if (n_template_parm_scopes < n_class_scopes)
303 /* We've not seen enough template headers to match all the
304 specialized classes present. For example:
306 template <class T> void R<T>::S<T>::f(int);
308 This is invalid; there needs to be one set of template
309 parameters for each class. */
310 return tsk_insufficient_parms;
311 else if (n_template_parm_scopes == n_class_scopes)
312 /* We're processing a non-template declaration (even though it may
313 be a member of a template class.) For example:
315 template <class T> void S<T>::f(int);
317 The `class T' maches the `S<T>', leaving no template headers
318 corresponding to the `f'. */
320 else if (n_template_parm_scopes > n_class_scopes + 1)
321 /* We've got too many template headers. For example:
323 template <> template <class T> void f (T);
325 There need to be more enclosing classes. */
326 return tsk_excessive_parms;
328 /* This must be a template. It's of the form:
330 template <class T> template <class U> void S<T>::f(U);
332 This is a specialization if the innermost level was a
333 specialization; otherwise it's just a definition of the
335 return innermost_specialization_p ? tsk_expl_spec : tsk_template;
338 /* Exit the current scope. */
346 /* When a label goes out of scope, check to see if that label was used
347 in a valid manner, and issue any appropriate warnings or errors. */
350 pop_label (tree label, tree old_value)
352 if (!processing_template_decl)
354 if (DECL_INITIAL (label) == NULL_TREE)
358 error ("label %q+D used but not defined", label);
359 #ifdef USE_MAPPED_LOCATION
360 location = input_location; /* FIXME want (input_filename, (line)0) */
362 location.file = input_filename;
365 /* Avoid crashing later. */
366 define_label (location, DECL_NAME (label));
368 else if (!TREE_USED (label))
369 warning (OPT_Wunused_label, "label %q+D defined but not used", label);
372 SET_IDENTIFIER_LABEL_VALUE (DECL_NAME (label), old_value);
375 /* At the end of a function, all labels declared within the function
376 go out of scope. BLOCK is the top-level block for the
380 pop_labels_1 (void **slot, void *data)
382 struct named_label_entry *ent = (struct named_label_entry *) *slot;
383 tree block = (tree) data;
385 pop_label (ent->label_decl, NULL_TREE);
387 /* Put the labels into the "variables" of the top-level block,
388 so debugger can see them. */
389 TREE_CHAIN (ent->label_decl) = BLOCK_VARS (block);
390 BLOCK_VARS (block) = ent->label_decl;
392 htab_clear_slot (named_labels, slot);
398 pop_labels (tree block)
402 htab_traverse (named_labels, pop_labels_1, block);
407 /* At the end of a block with local labels, restore the outer definition. */
410 pop_local_label (tree label, tree old_value)
412 struct named_label_entry dummy;
415 pop_label (label, old_value);
417 dummy.label_decl = label;
418 slot = htab_find_slot (named_labels, &dummy, NO_INSERT);
419 htab_clear_slot (named_labels, slot);
422 /* The following two routines are used to interface to Objective-C++.
423 The binding level is purposely treated as an opaque type. */
426 objc_get_current_scope (void)
428 return current_binding_level;
431 /* The following routine is used by the NeXT-style SJLJ exceptions;
432 variables get marked 'volatile' so as to not be clobbered by
433 _setjmp()/_longjmp() calls. All variables in the current scope,
434 as well as parent scopes up to (but not including) ENCLOSING_BLK
435 shall be thusly marked. */
438 objc_mark_locals_volatile (void *enclosing_blk)
440 struct cp_binding_level *scope;
442 for (scope = current_binding_level;
443 scope && scope != enclosing_blk;
444 scope = scope->level_chain)
448 for (decl = scope->names; decl; decl = TREE_CHAIN (decl))
449 objc_volatilize_decl (decl);
451 /* Do not climb up past the current function. */
452 if (scope->kind == sk_function_parms)
457 /* Update data for defined and undefined labels when leaving a scope. */
460 poplevel_named_label_1 (void **slot, void *data)
462 struct named_label_entry *ent = (struct named_label_entry *) *slot;
463 struct cp_binding_level *bl = (struct cp_binding_level *) data;
464 struct cp_binding_level *obl = bl->level_chain;
466 if (ent->binding_level == bl)
470 for (decl = ent->names_in_scope; decl; decl = TREE_CHAIN (decl))
471 if (decl_jump_unsafe (decl))
472 ent->bad_decls = tree_cons (NULL, decl, ent->bad_decls);
474 ent->binding_level = obl;
475 ent->names_in_scope = obl->names;
479 ent->in_try_scope = true;
482 ent->in_catch_scope = true;
485 ent->in_omp_scope = true;
493 struct named_label_use_entry *use;
495 for (use = ent->uses; use ; use = use->next)
496 if (use->binding_level == bl)
498 use->binding_level = obl;
499 use->names_in_scope = obl->names;
500 if (bl->kind == sk_omp)
501 use->in_omp_scope = true;
508 /* Exit a binding level.
509 Pop the level off, and restore the state of the identifier-decl mappings
510 that were in effect when this level was entered.
512 If KEEP == 1, this level had explicit declarations, so
513 and create a "block" (a BLOCK node) for the level
514 to record its declarations and subblocks for symbol table output.
516 If FUNCTIONBODY is nonzero, this level is the body of a function,
517 so create a block as if KEEP were set and also clear out all
520 If REVERSE is nonzero, reverse the order of decls before putting
521 them into the BLOCK. */
524 poplevel (int keep, int reverse, int functionbody)
527 /* The chain of decls was accumulated in reverse order.
528 Put it into forward order, just for cleanliness. */
530 int tmp = functionbody;
531 int real_functionbody;
535 int leaving_for_scope;
538 timevar_push (TV_NAME_LOOKUP);
543 gcc_assert (current_binding_level->kind != sk_class);
545 real_functionbody = (current_binding_level->kind == sk_cleanup
546 ? ((functionbody = 0), tmp) : functionbody);
547 subblocks = functionbody >= 0 ? current_binding_level->blocks : 0;
549 gcc_assert (!VEC_length(cp_class_binding,
550 current_binding_level->class_shadowed));
552 /* We used to use KEEP == 2 to indicate that the new block should go
553 at the beginning of the list of blocks at this binding level,
554 rather than the end. This hack is no longer used. */
555 gcc_assert (keep == 0 || keep == 1);
557 if (current_binding_level->keep)
560 /* Any uses of undefined labels, and any defined labels, now operate
561 under constraints of next binding contour. */
562 if (cfun && !functionbody && named_labels)
563 htab_traverse (named_labels, poplevel_named_label_1,
564 current_binding_level);
566 /* Get the decls in the order they were written.
567 Usually current_binding_level->names is in reverse order.
568 But parameter decls were previously put in forward order. */
571 current_binding_level->names
572 = decls = nreverse (current_binding_level->names);
574 decls = current_binding_level->names;
576 /* If there were any declarations or structure tags in that level,
577 or if this level is a function body,
578 create a BLOCK to record them for the life of this function. */
580 if (keep == 1 || functionbody)
581 block = make_node (BLOCK);
582 if (block != NULL_TREE)
584 BLOCK_VARS (block) = decls;
585 BLOCK_SUBBLOCKS (block) = subblocks;
588 /* In each subblock, record that this is its superior. */
590 for (link = subblocks; link; link = TREE_CHAIN (link))
591 BLOCK_SUPERCONTEXT (link) = block;
593 /* We still support the old for-scope rules, whereby the variables
594 in a for-init statement were in scope after the for-statement
595 ended. We only use the new rules if flag_new_for_scope is
598 = current_binding_level->kind == sk_for && flag_new_for_scope == 1;
600 /* Before we remove the declarations first check for unused variables. */
601 if (warn_unused_variable
602 && !processing_template_decl)
603 for (decl = getdecls (); decl; decl = TREE_CHAIN (decl))
604 if (TREE_CODE (decl) == VAR_DECL
605 && ! TREE_USED (decl)
606 && ! DECL_IN_SYSTEM_HEADER (decl)
607 && DECL_NAME (decl) && ! DECL_ARTIFICIAL (decl))
608 warning (OPT_Wunused_variable, "unused variable %q+D", decl);
610 /* Remove declarations for all the DECLs in this level. */
611 for (link = decls; link; link = TREE_CHAIN (link))
613 if (leaving_for_scope && TREE_CODE (link) == VAR_DECL
616 tree name = DECL_NAME (link);
620 ob = outer_binding (name,
621 IDENTIFIER_BINDING (name),
624 ns_binding = IDENTIFIER_NAMESPACE_VALUE (name);
626 ns_binding = NULL_TREE;
628 if (ob && ob->scope == current_binding_level->level_chain)
629 /* We have something like:
634 and we are leaving the `for' scope. There's no reason to
635 keep the binding of the inner `i' in this case. */
636 pop_binding (name, link);
637 else if ((ob && (TREE_CODE (ob->value) == TYPE_DECL))
638 || (ns_binding && TREE_CODE (ns_binding) == TYPE_DECL))
639 /* Here, we have something like:
647 We must pop the for-scope binding so we know what's a
648 type and what isn't. */
649 pop_binding (name, link);
652 /* Mark this VAR_DECL as dead so that we can tell we left it
653 there only for backward compatibility. */
654 DECL_DEAD_FOR_LOCAL (link) = 1;
656 /* Keep track of what should have happened when we
657 popped the binding. */
660 SET_DECL_SHADOWED_FOR_VAR (link, ob->value);
661 DECL_HAS_SHADOWED_FOR_VAR_P (link) = 1;
664 /* Add it to the list of dead variables in the next
665 outermost binding to that we can remove these when we
666 leave that binding. */
667 current_binding_level->level_chain->dead_vars_from_for
668 = tree_cons (NULL_TREE, link,
669 current_binding_level->level_chain->
672 /* Although we don't pop the cxx_binding, we do clear
673 its SCOPE since the scope is going away now. */
674 IDENTIFIER_BINDING (name)->scope
675 = current_binding_level->level_chain;
682 /* Remove the binding. */
685 if (TREE_CODE (decl) == TREE_LIST)
686 decl = TREE_VALUE (decl);
689 if (TREE_CODE (name) == OVERLOAD)
690 name = OVL_FUNCTION (name);
692 gcc_assert (DECL_P (name));
693 pop_binding (DECL_NAME (name), decl);
697 /* Remove declarations for any `for' variables from inner scopes
698 that we kept around. */
699 for (link = current_binding_level->dead_vars_from_for;
700 link; link = TREE_CHAIN (link))
701 pop_binding (DECL_NAME (TREE_VALUE (link)), TREE_VALUE (link));
703 /* Restore the IDENTIFIER_TYPE_VALUEs. */
704 for (link = current_binding_level->type_shadowed;
705 link; link = TREE_CHAIN (link))
706 SET_IDENTIFIER_TYPE_VALUE (TREE_PURPOSE (link), TREE_VALUE (link));
708 /* Restore the IDENTIFIER_LABEL_VALUEs for local labels. */
709 for (link = current_binding_level->shadowed_labels;
711 link = TREE_CHAIN (link))
712 pop_local_label (TREE_VALUE (link), TREE_PURPOSE (link));
714 /* There may be OVERLOADs (wrapped in TREE_LISTs) on the BLOCK_VARs
715 list if a `using' declaration put them there. The debugging
716 back-ends won't understand OVERLOAD, so we remove them here.
717 Because the BLOCK_VARS are (temporarily) shared with
718 CURRENT_BINDING_LEVEL->NAMES we must do this fixup after we have
719 popped all the bindings. */
724 for (d = &BLOCK_VARS (block); *d; )
726 if (TREE_CODE (*d) == TREE_LIST)
727 *d = TREE_CHAIN (*d);
729 d = &TREE_CHAIN (*d);
733 /* If the level being exited is the top level of a function,
734 check over all the labels. */
737 /* Since this is the top level block of a function, the vars are
738 the function's parameters. Don't leave them in the BLOCK
739 because they are found in the FUNCTION_DECL instead. */
740 BLOCK_VARS (block) = 0;
744 kind = current_binding_level->kind;
745 if (kind == sk_cleanup)
749 /* If this is a temporary binding created for a cleanup, then we'll
750 have pushed a statement list level. Pop that, create a new
751 BIND_EXPR for the block, and insert it into the stream. */
752 stmt = pop_stmt_list (current_binding_level->statement_list);
753 stmt = c_build_bind_expr (block, stmt);
759 DECL_INITIAL (current_function_decl) = block;
761 current_binding_level->blocks
762 = chainon (current_binding_level->blocks, block);
764 /* If we did not make a block for the level just exited,
765 any blocks made for inner levels
766 (since they cannot be recorded as subblocks in that level)
767 must be carried forward so they will later become subblocks
768 of something else. */
770 current_binding_level->blocks
771 = chainon (current_binding_level->blocks, subblocks);
773 /* Each and every BLOCK node created here in `poplevel' is important
774 (e.g. for proper debugging information) so if we created one
775 earlier, mark it as "used". */
777 TREE_USED (block) = 1;
779 /* All temporary bindings created for cleanups are popped silently. */
780 if (kind == sk_cleanup)
783 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, block);
786 /* Insert BLOCK at the end of the list of subblocks of the
787 current binding level. This is used when a BIND_EXPR is expanded,
788 to handle the BLOCK node inside the BIND_EXPR. */
791 insert_block (tree block)
793 TREE_USED (block) = 1;
794 current_binding_level->blocks
795 = chainon (current_binding_level->blocks, block);
798 /* Walk all the namespaces contained NAMESPACE, including NAMESPACE
799 itself, calling F for each. The DATA is passed to F as well. */
802 walk_namespaces_r (tree namespace, walk_namespaces_fn f, void* data)
805 tree current = NAMESPACE_LEVEL (namespace)->namespaces;
807 result |= (*f) (namespace, data);
809 for (; current; current = TREE_CHAIN (current))
810 result |= walk_namespaces_r (current, f, data);
815 /* Walk all the namespaces, calling F for each. The DATA is passed to
819 walk_namespaces (walk_namespaces_fn f, void* data)
821 return walk_namespaces_r (global_namespace, f, data);
824 /* Call wrapup_globals_declarations for the globals in NAMESPACE. If
825 DATA is non-NULL, this is the last time we will call
826 wrapup_global_declarations for this NAMESPACE. */
829 wrapup_globals_for_namespace (tree namespace, void* data)
831 struct cp_binding_level *level = NAMESPACE_LEVEL (namespace);
832 VEC(tree,gc) *statics = level->static_decls;
833 tree *vec = VEC_address (tree, statics);
834 int len = VEC_length (tree, statics);
835 int last_time = (data != 0);
839 check_global_declarations (vec, len);
840 emit_debug_global_declarations (vec, len);
844 /* Write out any globals that need to be output. */
845 return wrapup_global_declarations (vec, len);
849 /* In C++, you don't have to write `struct S' to refer to `S'; you
850 can just use `S'. We accomplish this by creating a TYPE_DECL as
851 if the user had written `typedef struct S S'. Create and return
852 the TYPE_DECL for TYPE. */
855 create_implicit_typedef (tree name, tree type)
859 decl = build_decl (TYPE_DECL, name, type);
860 DECL_ARTIFICIAL (decl) = 1;
861 /* There are other implicit type declarations, like the one *within*
862 a class that allows you to write `S::S'. We must distinguish
864 SET_DECL_IMPLICIT_TYPEDEF_P (decl);
865 TYPE_NAME (type) = decl;
870 /* Remember a local name for name-mangling purposes. */
873 push_local_name (tree decl)
878 timevar_push (TV_NAME_LOOKUP);
880 name = DECL_NAME (decl);
882 nelts = VEC_length (tree, local_names);
883 for (i = 0; i < nelts; i++)
885 t = VEC_index (tree, local_names, i);
886 if (DECL_NAME (t) == name)
888 if (!DECL_LANG_SPECIFIC (decl))
889 retrofit_lang_decl (decl);
890 DECL_LANG_SPECIFIC (decl)->decl_flags.u2sel = 1;
891 if (DECL_LANG_SPECIFIC (t))
892 DECL_DISCRIMINATOR (decl) = DECL_DISCRIMINATOR (t) + 1;
894 DECL_DISCRIMINATOR (decl) = 1;
896 VEC_replace (tree, local_names, i, decl);
897 timevar_pop (TV_NAME_LOOKUP);
902 VEC_safe_push (tree, gc, local_names, decl);
903 timevar_pop (TV_NAME_LOOKUP);
906 /* Subroutine of duplicate_decls: return truthvalue of whether
907 or not types of these decls match.
909 For C++, we must compare the parameter list so that `int' can match
910 `int&' in a parameter position, but `int&' is not confused with
914 decls_match (tree newdecl, tree olddecl)
918 if (newdecl == olddecl)
921 if (TREE_CODE (newdecl) != TREE_CODE (olddecl))
922 /* If the two DECLs are not even the same kind of thing, we're not
923 interested in their types. */
926 if (TREE_CODE (newdecl) == FUNCTION_DECL)
928 tree f1 = TREE_TYPE (newdecl);
929 tree f2 = TREE_TYPE (olddecl);
930 tree p1 = TYPE_ARG_TYPES (f1);
931 tree p2 = TYPE_ARG_TYPES (f2);
933 if (CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl)
934 && ! (DECL_EXTERN_C_P (newdecl)
935 && DECL_EXTERN_C_P (olddecl)))
938 if (TREE_CODE (f1) != TREE_CODE (f2))
941 if (same_type_p (TREE_TYPE (f1), TREE_TYPE (f2)))
943 if (p2 == NULL_TREE && DECL_EXTERN_C_P (olddecl)
944 && (DECL_BUILT_IN (olddecl)
945 #ifndef NO_IMPLICIT_EXTERN_C
946 || (DECL_IN_SYSTEM_HEADER (newdecl) && !DECL_CLASS_SCOPE_P (newdecl))
947 || (DECL_IN_SYSTEM_HEADER (olddecl) && !DECL_CLASS_SCOPE_P (olddecl))
951 types_match = self_promoting_args_p (p1);
952 if (p1 == void_list_node)
953 TREE_TYPE (newdecl) = TREE_TYPE (olddecl);
955 #ifndef NO_IMPLICIT_EXTERN_C
956 else if (p1 == NULL_TREE
957 && (DECL_EXTERN_C_P (olddecl)
958 && DECL_IN_SYSTEM_HEADER (olddecl)
959 && !DECL_CLASS_SCOPE_P (olddecl))
960 && (DECL_EXTERN_C_P (newdecl)
961 && DECL_IN_SYSTEM_HEADER (newdecl)
962 && !DECL_CLASS_SCOPE_P (newdecl)))
964 types_match = self_promoting_args_p (p2);
965 TREE_TYPE (newdecl) = TREE_TYPE (olddecl);
969 types_match = compparms (p1, p2);
974 else if (TREE_CODE (newdecl) == TEMPLATE_DECL)
976 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl))
977 != TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)))
980 if (!comp_template_parms (DECL_TEMPLATE_PARMS (newdecl),
981 DECL_TEMPLATE_PARMS (olddecl)))
984 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
985 types_match = same_type_p (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl)),
986 TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl)));
988 types_match = decls_match (DECL_TEMPLATE_RESULT (olddecl),
989 DECL_TEMPLATE_RESULT (newdecl));
993 /* Need to check scope for variable declaration (VAR_DECL).
994 For typedef (TYPE_DECL), scope is ignored. */
995 if (TREE_CODE (newdecl) == VAR_DECL
996 && CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl)
998 Two declarations for an object with C language linkage
999 with the same name (ignoring the namespace that qualify
1000 it) that appear in different namespace scopes refer to
1002 && !(DECL_EXTERN_C_P (olddecl) && DECL_EXTERN_C_P (newdecl)))
1005 if (TREE_TYPE (newdecl) == error_mark_node)
1006 types_match = TREE_TYPE (olddecl) == error_mark_node;
1007 else if (TREE_TYPE (olddecl) == NULL_TREE)
1008 types_match = TREE_TYPE (newdecl) == NULL_TREE;
1009 else if (TREE_TYPE (newdecl) == NULL_TREE)
1012 types_match = comptypes (TREE_TYPE (newdecl),
1013 TREE_TYPE (olddecl),
1014 COMPARE_REDECLARATION);
1020 /* If NEWDECL is `static' and an `extern' was seen previously,
1021 warn about it. OLDDECL is the previous declaration.
1023 Note that this does not apply to the C++ case of declaring
1024 a variable `extern const' and then later `const'.
1026 Don't complain about built-in functions, since they are beyond
1027 the user's control. */
1030 warn_extern_redeclared_static (tree newdecl, tree olddecl)
1034 if (TREE_CODE (newdecl) == TYPE_DECL
1035 || TREE_CODE (newdecl) == TEMPLATE_DECL
1036 || TREE_CODE (newdecl) == CONST_DECL
1037 || TREE_CODE (newdecl) == NAMESPACE_DECL)
1040 /* Don't get confused by static member functions; that's a different
1042 if (TREE_CODE (newdecl) == FUNCTION_DECL
1043 && DECL_STATIC_FUNCTION_P (newdecl))
1046 /* If the old declaration was `static', or the new one isn't, then
1047 then everything is OK. */
1048 if (DECL_THIS_STATIC (olddecl) || !DECL_THIS_STATIC (newdecl))
1051 /* It's OK to declare a builtin function as `static'. */
1052 if (TREE_CODE (olddecl) == FUNCTION_DECL
1053 && DECL_ARTIFICIAL (olddecl))
1056 name = DECL_ASSEMBLER_NAME (newdecl);
1057 pedwarn ("%qD was declared %<extern%> and later %<static%>", newdecl);
1058 pedwarn ("previous declaration of %q+D", olddecl);
1061 /* NEW_DECL is a redeclaration of OLD_DECL; both are functions or
1062 function templates. If their exception specifications do not
1063 match, issue an a diagnostic. */
1066 check_redeclaration_exception_specification (tree new_decl,
1071 tree new_exceptions;
1072 tree old_exceptions;
1074 new_type = TREE_TYPE (new_decl);
1075 new_exceptions = TYPE_RAISES_EXCEPTIONS (new_type);
1076 old_type = TREE_TYPE (old_decl);
1077 old_exceptions = TYPE_RAISES_EXCEPTIONS (old_type);
1081 If any declaration of a function has an exception-specification,
1082 all declarations, including the definition and an explicit
1083 specialization, of that function shall have an
1084 exception-specification with the same set of type-ids. */
1085 if ((pedantic || ! DECL_IN_SYSTEM_HEADER (old_decl))
1086 && ! DECL_IS_BUILTIN (old_decl)
1088 && !comp_except_specs (new_exceptions, old_exceptions,
1091 error ("declaration of %qF throws different exceptions", new_decl);
1092 error ("from previous declaration %q+F", old_decl);
1096 /* If NEWDECL is a redeclaration of OLDDECL, merge the declarations.
1097 If the redeclaration is invalid, a diagnostic is issued, and the
1098 error_mark_node is returned. Otherwise, OLDDECL is returned.
1100 If NEWDECL is not a redeclaration of OLDDECL, NULL_TREE is
1103 NEWDECL_IS_FRIEND is true if NEWDECL was declared as a friend. */
1106 duplicate_decls (tree newdecl, tree olddecl, bool newdecl_is_friend)
1108 unsigned olddecl_uid = DECL_UID (olddecl);
1109 int olddecl_friend = 0, types_match = 0, hidden_friend = 0;
1110 int new_defines_function = 0;
1113 if (newdecl == olddecl)
1116 types_match = decls_match (newdecl, olddecl);
1118 /* If either the type of the new decl or the type of the old decl is an
1119 error_mark_node, then that implies that we have already issued an
1120 error (earlier) for some bogus type specification, and in that case,
1121 it is rather pointless to harass the user with yet more error message
1122 about the same declaration, so just pretend the types match here. */
1123 if (TREE_TYPE (newdecl) == error_mark_node
1124 || TREE_TYPE (olddecl) == error_mark_node)
1125 return error_mark_node;
1127 if (DECL_P (olddecl)
1128 && TREE_CODE (newdecl) == FUNCTION_DECL
1129 && TREE_CODE (olddecl) == FUNCTION_DECL
1130 && (DECL_UNINLINABLE (newdecl) || DECL_UNINLINABLE (olddecl)))
1132 if (DECL_DECLARED_INLINE_P (newdecl)
1133 && DECL_UNINLINABLE (newdecl)
1134 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl)))
1135 /* Already warned elsewhere. */;
1136 else if (DECL_DECLARED_INLINE_P (olddecl)
1137 && DECL_UNINLINABLE (olddecl)
1138 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl)))
1139 /* Already warned. */;
1140 else if (DECL_DECLARED_INLINE_P (newdecl)
1141 && DECL_UNINLINABLE (olddecl)
1142 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl)))
1144 warning (OPT_Wattributes, "function %q+D redeclared as inline",
1146 warning (OPT_Wattributes, "previous declaration of %q+D "
1147 "with attribute noinline", olddecl);
1149 else if (DECL_DECLARED_INLINE_P (olddecl)
1150 && DECL_UNINLINABLE (newdecl)
1151 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl)))
1153 warning (OPT_Wattributes, "function %q+D redeclared with "
1154 "attribute noinline", newdecl);
1155 warning (OPT_Wattributes, "previous declaration of %q+D was inline",
1160 /* Check for redeclaration and other discrepancies. */
1161 if (TREE_CODE (olddecl) == FUNCTION_DECL
1162 && DECL_ARTIFICIAL (olddecl))
1164 gcc_assert (!DECL_HIDDEN_FRIEND_P (olddecl));
1165 if (TREE_CODE (newdecl) != FUNCTION_DECL)
1167 /* Avoid warnings redeclaring built-ins which have not been
1168 explicitly declared. */
1169 if (DECL_ANTICIPATED (olddecl))
1172 /* If you declare a built-in or predefined function name as static,
1173 the old definition is overridden, but optionally warn this was a
1174 bad choice of name. */
1175 if (! TREE_PUBLIC (newdecl))
1177 warning (OPT_Wshadow, "shadowing %s function %q#D",
1178 DECL_BUILT_IN (olddecl) ? "built-in" : "library",
1180 /* Discard the old built-in function. */
1183 /* If the built-in is not ansi, then programs can override
1184 it even globally without an error. */
1185 else if (! DECL_BUILT_IN (olddecl))
1186 warning (0, "library function %q#D redeclared as non-function %q#D",
1190 error ("declaration of %q#D", newdecl);
1191 error ("conflicts with built-in declaration %q#D",
1196 else if (!types_match)
1198 /* Avoid warnings redeclaring built-ins which have not been
1199 explicitly declared. */
1200 if (DECL_ANTICIPATED (olddecl))
1202 /* Deal with fileptr_type_node. FILE type is not known
1203 at the time we create the builtins. */
1206 for (t1 = TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1207 t2 = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1209 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2))
1212 else if (TREE_VALUE (t2) == fileptr_type_node)
1214 tree t = TREE_VALUE (t1);
1216 if (TREE_CODE (t) == POINTER_TYPE
1217 && TYPE_NAME (TREE_TYPE (t))
1218 && DECL_NAME (TYPE_NAME (TREE_TYPE (t)))
1219 == get_identifier ("FILE")
1220 && compparms (TREE_CHAIN (t1), TREE_CHAIN (t2)))
1222 tree oldargs = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1224 TYPE_ARG_TYPES (TREE_TYPE (olddecl))
1225 = TYPE_ARG_TYPES (TREE_TYPE (newdecl));
1226 types_match = decls_match (newdecl, olddecl);
1228 return duplicate_decls (newdecl, olddecl,
1230 TYPE_ARG_TYPES (TREE_TYPE (olddecl)) = oldargs;
1233 else if (! same_type_p (TREE_VALUE (t1), TREE_VALUE (t2)))
1236 else if ((DECL_EXTERN_C_P (newdecl)
1237 && DECL_EXTERN_C_P (olddecl))
1238 || compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1239 TYPE_ARG_TYPES (TREE_TYPE (olddecl))))
1241 /* A near match; override the builtin. */
1243 if (TREE_PUBLIC (newdecl))
1245 warning (0, "new declaration %q#D", newdecl);
1246 warning (0, "ambiguates built-in declaration %q#D",
1250 warning (OPT_Wshadow, "shadowing %s function %q#D",
1251 DECL_BUILT_IN (olddecl) ? "built-in" : "library",
1255 /* Discard the old built-in function. */
1258 /* Replace the old RTL to avoid problems with inlining. */
1259 COPY_DECL_RTL (newdecl, olddecl);
1261 /* Even if the types match, prefer the new declarations type for
1262 built-ins which have not been explicitly declared, for
1263 exception lists, etc... */
1264 else if (DECL_ANTICIPATED (olddecl))
1266 tree type = TREE_TYPE (newdecl);
1267 tree attribs = (*targetm.merge_type_attributes)
1268 (TREE_TYPE (olddecl), type);
1270 type = cp_build_type_attribute_variant (type, attribs);
1271 TREE_TYPE (newdecl) = TREE_TYPE (olddecl) = type;
1274 /* Whether or not the builtin can throw exceptions has no
1275 bearing on this declarator. */
1276 TREE_NOTHROW (olddecl) = 0;
1278 if (DECL_THIS_STATIC (newdecl) && !DECL_THIS_STATIC (olddecl))
1280 /* If a builtin function is redeclared as `static', merge
1281 the declarations, but make the original one static. */
1282 DECL_THIS_STATIC (olddecl) = 1;
1283 TREE_PUBLIC (olddecl) = 0;
1285 /* Make the old declaration consistent with the new one so
1286 that all remnants of the builtin-ness of this function
1287 will be banished. */
1288 SET_DECL_LANGUAGE (olddecl, DECL_LANGUAGE (newdecl));
1289 COPY_DECL_RTL (newdecl, olddecl);
1292 else if (TREE_CODE (olddecl) != TREE_CODE (newdecl))
1294 if ((TREE_CODE (olddecl) == TYPE_DECL && DECL_ARTIFICIAL (olddecl)
1295 && TREE_CODE (newdecl) != TYPE_DECL
1296 && ! (TREE_CODE (newdecl) == TEMPLATE_DECL
1297 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL))
1298 || (TREE_CODE (newdecl) == TYPE_DECL && DECL_ARTIFICIAL (newdecl)
1299 && TREE_CODE (olddecl) != TYPE_DECL
1300 && ! (TREE_CODE (olddecl) == TEMPLATE_DECL
1301 && (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl))
1304 /* We do nothing special here, because C++ does such nasty
1305 things with TYPE_DECLs. Instead, just let the TYPE_DECL
1306 get shadowed, and know that if we need to find a TYPE_DECL
1307 for a given name, we can look in the IDENTIFIER_TYPE_VALUE
1308 slot of the identifier. */
1312 if ((TREE_CODE (newdecl) == FUNCTION_DECL
1313 && DECL_FUNCTION_TEMPLATE_P (olddecl))
1314 || (TREE_CODE (olddecl) == FUNCTION_DECL
1315 && DECL_FUNCTION_TEMPLATE_P (newdecl)))
1318 error ("%q#D redeclared as different kind of symbol", newdecl);
1319 if (TREE_CODE (olddecl) == TREE_LIST)
1320 olddecl = TREE_VALUE (olddecl);
1321 error ("previous declaration of %q+#D", olddecl);
1323 return error_mark_node;
1325 else if (!types_match)
1327 if (CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl))
1328 /* These are certainly not duplicate declarations; they're
1329 from different scopes. */
1332 if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1334 /* The name of a class template may not be declared to refer to
1335 any other template, class, function, object, namespace, value,
1336 or type in the same scope. */
1337 if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) == TYPE_DECL
1338 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
1340 error ("declaration of template %q#D", newdecl);
1341 error ("conflicts with previous declaration %q+#D", olddecl);
1343 else if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) == FUNCTION_DECL
1344 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == FUNCTION_DECL
1345 && compparms (TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl))),
1346 TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl))))
1347 && comp_template_parms (DECL_TEMPLATE_PARMS (newdecl),
1348 DECL_TEMPLATE_PARMS (olddecl))
1349 /* Template functions can be disambiguated by
1351 && same_type_p (TREE_TYPE (TREE_TYPE (newdecl)),
1352 TREE_TYPE (TREE_TYPE (olddecl))))
1354 error ("new declaration %q#D", newdecl);
1355 error ("ambiguates old declaration %q+#D", olddecl);
1359 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1361 if (DECL_EXTERN_C_P (newdecl) && DECL_EXTERN_C_P (olddecl))
1363 error ("declaration of C function %q#D conflicts with",
1365 error ("previous declaration %q+#D here", olddecl);
1367 else if (compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1368 TYPE_ARG_TYPES (TREE_TYPE (olddecl))))
1370 error ("new declaration %q#D", newdecl);
1371 error ("ambiguates old declaration %q+#D", olddecl);
1372 return error_mark_node;
1379 error ("conflicting declaration %q#D", newdecl);
1380 error ("%q+D has a previous declaration as %q#D", olddecl, olddecl);
1381 return error_mark_node;
1384 else if (TREE_CODE (newdecl) == FUNCTION_DECL
1385 && ((DECL_TEMPLATE_SPECIALIZATION (olddecl)
1386 && (!DECL_TEMPLATE_INFO (newdecl)
1387 || (DECL_TI_TEMPLATE (newdecl)
1388 != DECL_TI_TEMPLATE (olddecl))))
1389 || (DECL_TEMPLATE_SPECIALIZATION (newdecl)
1390 && (!DECL_TEMPLATE_INFO (olddecl)
1391 || (DECL_TI_TEMPLATE (olddecl)
1392 != DECL_TI_TEMPLATE (newdecl))))))
1393 /* It's OK to have a template specialization and a non-template
1394 with the same type, or to have specializations of two
1395 different templates with the same type. Note that if one is a
1396 specialization, and the other is an instantiation of the same
1397 template, that we do not exit at this point. That situation
1398 can occur if we instantiate a template class, and then
1399 specialize one of its methods. This situation is valid, but
1400 the declarations must be merged in the usual way. */
1402 else if (TREE_CODE (newdecl) == FUNCTION_DECL
1403 && ((DECL_TEMPLATE_INSTANTIATION (olddecl)
1404 && !DECL_USE_TEMPLATE (newdecl))
1405 || (DECL_TEMPLATE_INSTANTIATION (newdecl)
1406 && !DECL_USE_TEMPLATE (olddecl))))
1407 /* One of the declarations is a template instantiation, and the
1408 other is not a template at all. That's OK. */
1410 else if (TREE_CODE (newdecl) == NAMESPACE_DECL)
1412 /* In [namespace.alias] we have:
1414 In a declarative region, a namespace-alias-definition can be
1415 used to redefine a namespace-alias declared in that declarative
1416 region to refer only to the namespace to which it already
1419 Therefore, if we encounter a second alias directive for the same
1420 alias, we can just ignore the second directive. */
1421 if (DECL_NAMESPACE_ALIAS (newdecl)
1422 && (DECL_NAMESPACE_ALIAS (newdecl)
1423 == DECL_NAMESPACE_ALIAS (olddecl)))
1425 /* [namespace.alias]
1427 A namespace-name or namespace-alias shall not be declared as
1428 the name of any other entity in the same declarative region.
1429 A namespace-name defined at global scope shall not be
1430 declared as the name of any other entity in any global scope
1432 error ("declaration of namespace %qD conflicts with", newdecl);
1433 error ("previous declaration of namespace %q+D here", olddecl);
1434 return error_mark_node;
1438 const char *errmsg = redeclaration_error_message (newdecl, olddecl);
1441 error (errmsg, newdecl);
1442 if (DECL_NAME (olddecl) != NULL_TREE)
1443 error ((DECL_INITIAL (olddecl) && namespace_bindings_p ())
1444 ? "%q+#D previously defined here"
1445 : "%q+#D previously declared here", olddecl);
1446 return error_mark_node;
1448 else if (TREE_CODE (olddecl) == FUNCTION_DECL
1449 && DECL_INITIAL (olddecl) != NULL_TREE
1450 && TYPE_ARG_TYPES (TREE_TYPE (olddecl)) == NULL_TREE
1451 && TYPE_ARG_TYPES (TREE_TYPE (newdecl)) != NULL_TREE)
1453 /* Prototype decl follows defn w/o prototype. */
1454 warning (0, "prototype for %q+#D", newdecl);
1455 warning (0, "%Jfollows non-prototype definition here", olddecl);
1457 else if ((TREE_CODE (olddecl) == FUNCTION_DECL
1458 || TREE_CODE (olddecl) == VAR_DECL)
1459 && DECL_LANGUAGE (newdecl) != DECL_LANGUAGE (olddecl))
1462 If two declarations of the same function or object
1463 specify different linkage-specifications ..., the program
1464 is ill-formed.... Except for functions with C++ linkage,
1465 a function declaration without a linkage specification
1466 shall not precede the first linkage specification for
1467 that function. A function can be declared without a
1468 linkage specification after an explicit linkage
1469 specification has been seen; the linkage explicitly
1470 specified in the earlier declaration is not affected by
1471 such a function declaration.
1473 DR 563 raises the question why the restrictions on
1474 functions should not also apply to objects. Older
1475 versions of G++ silently ignore the linkage-specification
1483 which is clearly wrong. Therefore, we now treat objects
1485 if (current_lang_depth () == 0)
1487 /* There is no explicit linkage-specification, so we use
1488 the linkage from the previous declaration. */
1489 if (!DECL_LANG_SPECIFIC (newdecl))
1490 retrofit_lang_decl (newdecl);
1491 SET_DECL_LANGUAGE (newdecl, DECL_LANGUAGE (olddecl));
1495 error ("previous declaration of %q+#D with %qL linkage",
1496 olddecl, DECL_LANGUAGE (olddecl));
1497 error ("conflicts with new declaration with %qL linkage",
1498 DECL_LANGUAGE (newdecl));
1502 if (DECL_LANG_SPECIFIC (olddecl) && DECL_USE_TEMPLATE (olddecl))
1504 else if (TREE_CODE (olddecl) == FUNCTION_DECL)
1506 tree t1 = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1507 tree t2 = TYPE_ARG_TYPES (TREE_TYPE (newdecl));
1510 if (TREE_CODE (TREE_TYPE (newdecl)) == METHOD_TYPE)
1511 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2);
1513 for (; t1 && t1 != void_list_node;
1514 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2), i++)
1515 if (TREE_PURPOSE (t1) && TREE_PURPOSE (t2))
1517 if (1 == simple_cst_equal (TREE_PURPOSE (t1),
1520 pedwarn ("default argument given for parameter %d of %q#D",
1522 pedwarn ("after previous specification in %q+#D", olddecl);
1526 error ("default argument given for parameter %d of %q#D",
1528 error ("after previous specification in %q+#D",
1533 if (DECL_DECLARED_INLINE_P (newdecl)
1534 && ! DECL_DECLARED_INLINE_P (olddecl)
1535 && TREE_ADDRESSABLE (olddecl) && warn_inline)
1537 warning (0, "%q#D was used before it was declared inline", newdecl);
1538 warning (0, "%Jprevious non-inline declaration here", olddecl);
1543 /* Do not merge an implicit typedef with an explicit one. In:
1547 typedef class A A __attribute__ ((foo));
1549 the attribute should apply only to the typedef. */
1550 if (TREE_CODE (olddecl) == TYPE_DECL
1551 && (DECL_IMPLICIT_TYPEDEF_P (olddecl)
1552 || DECL_IMPLICIT_TYPEDEF_P (newdecl)))
1555 /* If new decl is `static' and an `extern' was seen previously,
1557 warn_extern_redeclared_static (newdecl, olddecl);
1559 /* We have committed to returning 1 at this point. */
1560 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1562 /* Now that functions must hold information normally held
1563 by field decls, there is extra work to do so that
1564 declaration information does not get destroyed during
1566 if (DECL_VINDEX (olddecl))
1567 DECL_VINDEX (newdecl) = DECL_VINDEX (olddecl);
1568 if (DECL_CONTEXT (olddecl))
1569 DECL_CONTEXT (newdecl) = DECL_CONTEXT (olddecl);
1570 DECL_STATIC_CONSTRUCTOR (newdecl) |= DECL_STATIC_CONSTRUCTOR (olddecl);
1571 DECL_STATIC_DESTRUCTOR (newdecl) |= DECL_STATIC_DESTRUCTOR (olddecl);
1572 DECL_PURE_VIRTUAL_P (newdecl) |= DECL_PURE_VIRTUAL_P (olddecl);
1573 DECL_VIRTUAL_P (newdecl) |= DECL_VIRTUAL_P (olddecl);
1574 DECL_THIS_STATIC (newdecl) |= DECL_THIS_STATIC (olddecl);
1575 if (DECL_OVERLOADED_OPERATOR_P (olddecl) != ERROR_MARK)
1576 SET_OVERLOADED_OPERATOR_CODE
1577 (newdecl, DECL_OVERLOADED_OPERATOR_P (olddecl));
1578 new_defines_function = DECL_INITIAL (newdecl) != NULL_TREE;
1580 /* Optionally warn about more than one declaration for the same
1581 name, but don't warn about a function declaration followed by a
1583 if (warn_redundant_decls && ! DECL_ARTIFICIAL (olddecl)
1584 && !(new_defines_function && DECL_INITIAL (olddecl) == NULL_TREE)
1585 /* Don't warn about extern decl followed by definition. */
1586 && !(DECL_EXTERNAL (olddecl) && ! DECL_EXTERNAL (newdecl))
1587 /* Don't warn about friends, let add_friend take care of it. */
1588 && ! (newdecl_is_friend || DECL_FRIEND_P (olddecl)))
1590 warning (OPT_Wredundant_decls, "redundant redeclaration of %qD in same scope", newdecl);
1591 warning (OPT_Wredundant_decls, "previous declaration of %q+D", olddecl);
1595 /* Deal with C++: must preserve virtual function table size. */
1596 if (TREE_CODE (olddecl) == TYPE_DECL)
1598 tree newtype = TREE_TYPE (newdecl);
1599 tree oldtype = TREE_TYPE (olddecl);
1601 if (newtype != error_mark_node && oldtype != error_mark_node
1602 && TYPE_LANG_SPECIFIC (newtype) && TYPE_LANG_SPECIFIC (oldtype))
1603 CLASSTYPE_FRIEND_CLASSES (newtype)
1604 = CLASSTYPE_FRIEND_CLASSES (oldtype);
1606 DECL_ORIGINAL_TYPE (newdecl) = DECL_ORIGINAL_TYPE (olddecl);
1609 /* Copy all the DECL_... slots specified in the new decl
1610 except for any that we copy here from the old type. */
1611 DECL_ATTRIBUTES (newdecl)
1612 = (*targetm.merge_decl_attributes) (olddecl, newdecl);
1614 if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1618 old_result = DECL_TEMPLATE_RESULT (olddecl);
1619 new_result = DECL_TEMPLATE_RESULT (newdecl);
1620 TREE_TYPE (olddecl) = TREE_TYPE (old_result);
1621 DECL_TEMPLATE_SPECIALIZATIONS (olddecl)
1622 = chainon (DECL_TEMPLATE_SPECIALIZATIONS (olddecl),
1623 DECL_TEMPLATE_SPECIALIZATIONS (newdecl));
1625 if (DECL_FUNCTION_TEMPLATE_P (newdecl))
1627 DECL_INLINE (old_result)
1628 |= DECL_INLINE (new_result);
1629 DECL_DECLARED_INLINE_P (old_result)
1630 |= DECL_DECLARED_INLINE_P (new_result);
1631 check_redeclaration_exception_specification (newdecl, olddecl);
1634 /* If the new declaration is a definition, update the file and
1635 line information on the declaration. */
1636 if (DECL_INITIAL (old_result) == NULL_TREE
1637 && DECL_INITIAL (new_result) != NULL_TREE)
1639 DECL_SOURCE_LOCATION (olddecl)
1640 = DECL_SOURCE_LOCATION (old_result)
1641 = DECL_SOURCE_LOCATION (newdecl);
1642 if (DECL_FUNCTION_TEMPLATE_P (newdecl))
1643 DECL_ARGUMENTS (old_result)
1644 = DECL_ARGUMENTS (new_result);
1652 /* Automatically handles default parameters. */
1653 tree oldtype = TREE_TYPE (olddecl);
1656 /* Merge the data types specified in the two decls. */
1657 newtype = merge_types (TREE_TYPE (newdecl), TREE_TYPE (olddecl));
1659 /* If merge_types produces a non-typedef type, just use the old type. */
1660 if (TREE_CODE (newdecl) == TYPE_DECL
1661 && newtype == DECL_ORIGINAL_TYPE (newdecl))
1664 if (TREE_CODE (newdecl) == VAR_DECL)
1666 DECL_THIS_EXTERN (newdecl) |= DECL_THIS_EXTERN (olddecl);
1667 DECL_INITIALIZED_P (newdecl) |= DECL_INITIALIZED_P (olddecl);
1668 DECL_NONTRIVIALLY_INITIALIZED_P (newdecl)
1669 |= DECL_NONTRIVIALLY_INITIALIZED_P (olddecl);
1670 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (newdecl)
1671 |= DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (olddecl);
1673 /* Merge the threadprivate attribute from OLDDECL into NEWDECL. */
1674 if (DECL_LANG_SPECIFIC (olddecl)
1675 && CP_DECL_THREADPRIVATE_P (olddecl))
1677 /* Allocate a LANG_SPECIFIC structure for NEWDECL, if needed. */
1678 if (!DECL_LANG_SPECIFIC (newdecl))
1679 retrofit_lang_decl (newdecl);
1681 DECL_TLS_MODEL (newdecl) = DECL_TLS_MODEL (olddecl);
1682 CP_DECL_THREADPRIVATE_P (newdecl) = 1;
1686 /* Do this after calling `merge_types' so that default
1687 parameters don't confuse us. */
1688 else if (TREE_CODE (newdecl) == FUNCTION_DECL)
1689 check_redeclaration_exception_specification (newdecl, olddecl);
1690 TREE_TYPE (newdecl) = TREE_TYPE (olddecl) = newtype;
1692 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1693 check_default_args (newdecl);
1695 /* Lay the type out, unless already done. */
1696 if (! same_type_p (newtype, oldtype)
1697 && TREE_TYPE (newdecl) != error_mark_node
1698 && !(processing_template_decl && uses_template_parms (newdecl)))
1699 layout_type (TREE_TYPE (newdecl));
1701 if ((TREE_CODE (newdecl) == VAR_DECL
1702 || TREE_CODE (newdecl) == PARM_DECL
1703 || TREE_CODE (newdecl) == RESULT_DECL
1704 || TREE_CODE (newdecl) == FIELD_DECL
1705 || TREE_CODE (newdecl) == TYPE_DECL)
1706 && !(processing_template_decl && uses_template_parms (newdecl)))
1707 layout_decl (newdecl, 0);
1709 /* Merge the type qualifiers. */
1710 if (TREE_READONLY (newdecl))
1711 TREE_READONLY (olddecl) = 1;
1712 if (TREE_THIS_VOLATILE (newdecl))
1713 TREE_THIS_VOLATILE (olddecl) = 1;
1714 if (TREE_NOTHROW (newdecl))
1715 TREE_NOTHROW (olddecl) = 1;
1717 /* Merge deprecatedness. */
1718 if (TREE_DEPRECATED (newdecl))
1719 TREE_DEPRECATED (olddecl) = 1;
1721 /* Merge the initialization information. */
1722 if (DECL_INITIAL (newdecl) == NULL_TREE
1723 && DECL_INITIAL (olddecl) != NULL_TREE)
1725 DECL_INITIAL (newdecl) = DECL_INITIAL (olddecl);
1726 DECL_SOURCE_LOCATION (newdecl) = DECL_SOURCE_LOCATION (olddecl);
1727 if (CAN_HAVE_FULL_LANG_DECL_P (newdecl)
1728 && DECL_LANG_SPECIFIC (newdecl)
1729 && DECL_LANG_SPECIFIC (olddecl))
1731 DECL_SAVED_TREE (newdecl) = DECL_SAVED_TREE (olddecl);
1732 DECL_STRUCT_FUNCTION (newdecl) = DECL_STRUCT_FUNCTION (olddecl);
1736 /* Merge the section attribute.
1737 We want to issue an error if the sections conflict but that must be
1738 done later in decl_attributes since we are called before attributes
1740 if (DECL_SECTION_NAME (newdecl) == NULL_TREE)
1741 DECL_SECTION_NAME (newdecl) = DECL_SECTION_NAME (olddecl);
1743 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1745 DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (newdecl)
1746 |= DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (olddecl);
1747 DECL_NO_LIMIT_STACK (newdecl) |= DECL_NO_LIMIT_STACK (olddecl);
1748 TREE_THIS_VOLATILE (newdecl) |= TREE_THIS_VOLATILE (olddecl);
1749 TREE_READONLY (newdecl) |= TREE_READONLY (olddecl);
1750 TREE_NOTHROW (newdecl) |= TREE_NOTHROW (olddecl);
1751 DECL_IS_MALLOC (newdecl) |= DECL_IS_MALLOC (olddecl);
1752 DECL_IS_PURE (newdecl) |= DECL_IS_PURE (olddecl);
1753 /* Keep the old RTL. */
1754 COPY_DECL_RTL (olddecl, newdecl);
1756 else if (TREE_CODE (newdecl) == VAR_DECL
1757 && (DECL_SIZE (olddecl) || !DECL_SIZE (newdecl)))
1759 /* Keep the old RTL. We cannot keep the old RTL if the old
1760 declaration was for an incomplete object and the new
1761 declaration is not since many attributes of the RTL will
1763 COPY_DECL_RTL (olddecl, newdecl);
1766 /* If cannot merge, then use the new type and qualifiers,
1767 and don't preserve the old rtl. */
1770 /* Clean out any memory we had of the old declaration. */
1771 tree oldstatic = value_member (olddecl, static_aggregates);
1773 TREE_VALUE (oldstatic) = error_mark_node;
1775 TREE_TYPE (olddecl) = TREE_TYPE (newdecl);
1776 TREE_READONLY (olddecl) = TREE_READONLY (newdecl);
1777 TREE_THIS_VOLATILE (olddecl) = TREE_THIS_VOLATILE (newdecl);
1778 TREE_SIDE_EFFECTS (olddecl) = TREE_SIDE_EFFECTS (newdecl);
1781 /* Merge the storage class information. */
1782 merge_weak (newdecl, olddecl);
1784 DECL_ONE_ONLY (newdecl) |= DECL_ONE_ONLY (olddecl);
1785 DECL_DEFER_OUTPUT (newdecl) |= DECL_DEFER_OUTPUT (olddecl);
1786 TREE_PUBLIC (newdecl) = TREE_PUBLIC (olddecl);
1787 TREE_STATIC (olddecl) = TREE_STATIC (newdecl) |= TREE_STATIC (olddecl);
1788 if (! DECL_EXTERNAL (olddecl))
1789 DECL_EXTERNAL (newdecl) = 0;
1791 new_template = NULL_TREE;
1792 if (DECL_LANG_SPECIFIC (newdecl) && DECL_LANG_SPECIFIC (olddecl))
1794 DECL_INTERFACE_KNOWN (newdecl) |= DECL_INTERFACE_KNOWN (olddecl);
1795 DECL_NOT_REALLY_EXTERN (newdecl) |= DECL_NOT_REALLY_EXTERN (olddecl);
1796 DECL_COMDAT (newdecl) |= DECL_COMDAT (olddecl);
1797 DECL_TEMPLATE_INSTANTIATED (newdecl)
1798 |= DECL_TEMPLATE_INSTANTIATED (olddecl);
1800 /* If the OLDDECL is an instantiation and/or specialization,
1801 then the NEWDECL must be too. But, it may not yet be marked
1802 as such if the caller has created NEWDECL, but has not yet
1803 figured out that it is a redeclaration. */
1804 if (!DECL_USE_TEMPLATE (newdecl))
1805 DECL_USE_TEMPLATE (newdecl) = DECL_USE_TEMPLATE (olddecl);
1807 /* Don't really know how much of the language-specific
1808 values we should copy from old to new. */
1809 DECL_IN_AGGR_P (newdecl) = DECL_IN_AGGR_P (olddecl);
1810 DECL_LANG_SPECIFIC (newdecl)->decl_flags.u2 =
1811 DECL_LANG_SPECIFIC (olddecl)->decl_flags.u2;
1812 DECL_NONCONVERTING_P (newdecl) = DECL_NONCONVERTING_P (olddecl);
1813 DECL_REPO_AVAILABLE_P (newdecl) = DECL_REPO_AVAILABLE_P (olddecl);
1814 if (DECL_TEMPLATE_INFO (newdecl))
1815 new_template = DECL_TI_TEMPLATE (newdecl);
1816 DECL_TEMPLATE_INFO (newdecl) = DECL_TEMPLATE_INFO (olddecl);
1817 DECL_INITIALIZED_IN_CLASS_P (newdecl)
1818 |= DECL_INITIALIZED_IN_CLASS_P (olddecl);
1819 olddecl_friend = DECL_FRIEND_P (olddecl);
1820 hidden_friend = (DECL_ANTICIPATED (olddecl)
1821 && DECL_HIDDEN_FRIEND_P (olddecl)
1822 && newdecl_is_friend);
1824 /* Only functions have DECL_BEFRIENDING_CLASSES. */
1825 if (TREE_CODE (newdecl) == FUNCTION_DECL
1826 || DECL_FUNCTION_TEMPLATE_P (newdecl))
1828 DECL_BEFRIENDING_CLASSES (newdecl)
1829 = chainon (DECL_BEFRIENDING_CLASSES (newdecl),
1830 DECL_BEFRIENDING_CLASSES (olddecl));
1831 /* DECL_THUNKS is only valid for virtual functions,
1832 otherwise it is a DECL_FRIEND_CONTEXT. */
1833 if (DECL_VIRTUAL_P (newdecl))
1834 DECL_THUNKS (newdecl) = DECL_THUNKS (olddecl);
1838 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1840 if (DECL_TEMPLATE_INSTANTIATION (olddecl)
1841 && !DECL_TEMPLATE_INSTANTIATION (newdecl))
1843 /* If newdecl is not a specialization, then it is not a
1844 template-related function at all. And that means that we
1845 should have exited above, returning 0. */
1846 gcc_assert (DECL_TEMPLATE_SPECIALIZATION (newdecl));
1848 if (TREE_USED (olddecl))
1849 /* From [temp.expl.spec]:
1851 If a template, a member template or the member of a class
1852 template is explicitly specialized then that
1853 specialization shall be declared before the first use of
1854 that specialization that would cause an implicit
1855 instantiation to take place, in every translation unit in
1856 which such a use occurs. */
1857 error ("explicit specialization of %qD after first use",
1860 SET_DECL_TEMPLATE_SPECIALIZATION (olddecl);
1862 /* Don't propagate visibility from the template to the
1863 specialization here. We'll do that in determine_visibility if
1865 DECL_VISIBILITY_SPECIFIED (olddecl) = 0;
1867 /* [temp.expl.spec/14] We don't inline explicit specialization
1868 just because the primary template says so. */
1872 if (DECL_PENDING_INLINE_INFO (newdecl) == 0)
1873 DECL_PENDING_INLINE_INFO (newdecl) = DECL_PENDING_INLINE_INFO (olddecl);
1875 DECL_DECLARED_INLINE_P (newdecl) |= DECL_DECLARED_INLINE_P (olddecl);
1877 /* If either decl says `inline', this fn is inline, unless
1878 its definition was passed already. */
1879 if (DECL_INLINE (newdecl) && DECL_INITIAL (olddecl) == NULL_TREE)
1880 DECL_INLINE (olddecl) = 1;
1881 DECL_INLINE (newdecl) = DECL_INLINE (olddecl);
1883 DECL_UNINLINABLE (newdecl) = DECL_UNINLINABLE (olddecl)
1884 = (DECL_UNINLINABLE (newdecl) || DECL_UNINLINABLE (olddecl));
1887 /* Preserve abstractness on cloned [cd]tors. */
1888 DECL_ABSTRACT (newdecl) = DECL_ABSTRACT (olddecl);
1892 SET_DECL_LANGUAGE (olddecl, DECL_LANGUAGE (newdecl));
1893 COPY_DECL_ASSEMBLER_NAME (newdecl, olddecl);
1894 COPY_DECL_RTL (newdecl, olddecl);
1896 if (! types_match || new_defines_function)
1898 /* These need to be copied so that the names are available.
1899 Note that if the types do match, we'll preserve inline
1900 info and other bits, but if not, we won't. */
1901 DECL_ARGUMENTS (olddecl) = DECL_ARGUMENTS (newdecl);
1902 DECL_RESULT (olddecl) = DECL_RESULT (newdecl);
1904 if (new_defines_function)
1905 /* If defining a function declared with other language
1906 linkage, use the previously declared language linkage. */
1907 SET_DECL_LANGUAGE (newdecl, DECL_LANGUAGE (olddecl));
1908 else if (types_match)
1910 /* If redeclaring a builtin function, and not a definition,
1911 it stays built in. */
1912 if (DECL_BUILT_IN (olddecl))
1914 DECL_BUILT_IN_CLASS (newdecl) = DECL_BUILT_IN_CLASS (olddecl);
1915 DECL_FUNCTION_CODE (newdecl) = DECL_FUNCTION_CODE (olddecl);
1916 /* If we're keeping the built-in definition, keep the rtl,
1917 regardless of declaration matches. */
1918 COPY_DECL_RTL (olddecl, newdecl);
1921 DECL_RESULT (newdecl) = DECL_RESULT (olddecl);
1922 /* Don't clear out the arguments if we're redefining a function. */
1923 if (DECL_ARGUMENTS (olddecl))
1924 DECL_ARGUMENTS (newdecl) = DECL_ARGUMENTS (olddecl);
1927 else if (TREE_CODE (newdecl) == NAMESPACE_DECL)
1928 NAMESPACE_LEVEL (newdecl) = NAMESPACE_LEVEL (olddecl);
1930 /* Now preserve various other info from the definition. */
1931 TREE_ADDRESSABLE (newdecl) = TREE_ADDRESSABLE (olddecl);
1932 TREE_ASM_WRITTEN (newdecl) = TREE_ASM_WRITTEN (olddecl);
1933 DECL_COMMON (newdecl) = DECL_COMMON (olddecl);
1934 COPY_DECL_ASSEMBLER_NAME (olddecl, newdecl);
1936 /* Warn about conflicting visibility specifications. */
1937 if (DECL_VISIBILITY_SPECIFIED (olddecl)
1938 && DECL_VISIBILITY_SPECIFIED (newdecl)
1939 && DECL_VISIBILITY (newdecl) != DECL_VISIBILITY (olddecl))
1941 warning (OPT_Wattributes, "%q+D: visibility attribute ignored "
1942 "because it", newdecl);
1943 warning (OPT_Wattributes, "%Jconflicts with previous "
1944 "declaration here", olddecl);
1946 /* Choose the declaration which specified visibility. */
1947 if (DECL_VISIBILITY_SPECIFIED (olddecl))
1949 DECL_VISIBILITY (newdecl) = DECL_VISIBILITY (olddecl);
1950 DECL_VISIBILITY_SPECIFIED (newdecl) = 1;
1952 /* Init priority used to be merged from newdecl to olddecl by the memcpy,
1953 so keep this behavior. */
1954 if (TREE_CODE (newdecl) == VAR_DECL && DECL_HAS_INIT_PRIORITY_P (newdecl))
1956 SET_DECL_INIT_PRIORITY (olddecl, DECL_INIT_PRIORITY (newdecl));
1957 DECL_HAS_INIT_PRIORITY_P (olddecl) = 1;
1960 /* The DECL_LANG_SPECIFIC information in OLDDECL will be replaced
1961 with that from NEWDECL below. */
1962 if (DECL_LANG_SPECIFIC (olddecl))
1964 gcc_assert (DECL_LANG_SPECIFIC (olddecl)
1965 != DECL_LANG_SPECIFIC (newdecl));
1966 ggc_free (DECL_LANG_SPECIFIC (olddecl));
1969 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1973 function_size = sizeof (struct tree_decl_common);
1975 memcpy ((char *) olddecl + sizeof (struct tree_common),
1976 (char *) newdecl + sizeof (struct tree_common),
1977 function_size - sizeof (struct tree_common));
1979 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
1980 (char *) newdecl + sizeof (struct tree_decl_common),
1981 sizeof (struct tree_function_decl) - sizeof (struct tree_decl_common));
1983 /* If newdecl is a template instantiation, it is possible that
1984 the following sequence of events has occurred:
1986 o A friend function was declared in a class template. The
1987 class template was instantiated.
1989 o The instantiation of the friend declaration was
1990 recorded on the instantiation list, and is newdecl.
1992 o Later, however, instantiate_class_template called pushdecl
1993 on the newdecl to perform name injection. But, pushdecl in
1994 turn called duplicate_decls when it discovered that another
1995 declaration of a global function with the same name already
1998 o Here, in duplicate_decls, we decided to clobber newdecl.
2000 If we're going to do that, we'd better make sure that
2001 olddecl, and not newdecl, is on the list of
2002 instantiations so that if we try to do the instantiation
2003 again we won't get the clobbered declaration. */
2004 reregister_specialization (newdecl,
2010 size_t size = tree_code_size (TREE_CODE (olddecl));
2011 memcpy ((char *) olddecl + sizeof (struct tree_common),
2012 (char *) newdecl + sizeof (struct tree_common),
2013 sizeof (struct tree_decl_common) - sizeof (struct tree_common));
2014 switch (TREE_CODE (olddecl))
2024 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
2025 (char *) newdecl + sizeof (struct tree_decl_common),
2026 size - sizeof (struct tree_decl_common)
2027 + TREE_CODE_LENGTH (TREE_CODE (newdecl)) * sizeof (char *));
2031 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
2032 (char *) newdecl + sizeof (struct tree_decl_common),
2033 sizeof (struct tree_decl_non_common) - sizeof (struct tree_decl_common)
2034 + TREE_CODE_LENGTH (TREE_CODE (newdecl)) * sizeof (char *));
2038 DECL_UID (olddecl) = olddecl_uid;
2040 DECL_FRIEND_P (olddecl) = 1;
2043 DECL_ANTICIPATED (olddecl) = 1;
2044 DECL_HIDDEN_FRIEND_P (olddecl) = 1;
2047 /* NEWDECL contains the merged attribute lists.
2048 Update OLDDECL to be the same. */
2049 DECL_ATTRIBUTES (olddecl) = DECL_ATTRIBUTES (newdecl);
2051 /* If OLDDECL had its DECL_RTL instantiated, re-invoke make_decl_rtl
2052 so that encode_section_info has a chance to look at the new decl
2053 flags and attributes. */
2054 if (DECL_RTL_SET_P (olddecl)
2055 && (TREE_CODE (olddecl) == FUNCTION_DECL
2056 || (TREE_CODE (olddecl) == VAR_DECL
2057 && TREE_STATIC (olddecl))))
2058 make_decl_rtl (olddecl);
2060 /* The NEWDECL will no longer be needed. Because every out-of-class
2061 declaration of a member results in a call to duplicate_decls,
2062 freeing these nodes represents in a significant savings. */
2068 /* Return zero if the declaration NEWDECL is valid
2069 when the declaration OLDDECL (assumed to be for the same name)
2070 has already been seen.
2071 Otherwise return an error message format string with a %s
2072 where the identifier should go. */
2075 redeclaration_error_message (tree newdecl, tree olddecl)
2077 if (TREE_CODE (newdecl) == TYPE_DECL)
2079 /* Because C++ can put things into name space for free,
2080 constructs like "typedef struct foo { ... } foo"
2081 would look like an erroneous redeclaration. */
2082 if (same_type_p (TREE_TYPE (newdecl), TREE_TYPE (olddecl)))
2085 return "redefinition of %q#D";
2087 else if (TREE_CODE (newdecl) == FUNCTION_DECL)
2089 /* If this is a pure function, its olddecl will actually be
2090 the original initialization to `0' (which we force to call
2091 abort()). Don't complain about redefinition in this case. */
2092 if (DECL_LANG_SPECIFIC (olddecl) && DECL_PURE_VIRTUAL_P (olddecl)
2093 && DECL_INITIAL (olddecl) == NULL_TREE)
2096 /* If both functions come from different namespaces, this is not
2097 a redeclaration - this is a conflict with a used function. */
2098 if (DECL_NAMESPACE_SCOPE_P (olddecl)
2099 && DECL_CONTEXT (olddecl) != DECL_CONTEXT (newdecl)
2100 && ! decls_match (olddecl, newdecl))
2101 return "%qD conflicts with used function";
2103 /* We'll complain about linkage mismatches in
2104 warn_extern_redeclared_static. */
2106 /* Defining the same name twice is no good. */
2107 if (DECL_INITIAL (olddecl) != NULL_TREE
2108 && DECL_INITIAL (newdecl) != NULL_TREE)
2110 if (DECL_NAME (olddecl) == NULL_TREE)
2111 return "%q#D not declared in class";
2113 return "redefinition of %q#D";
2117 else if (TREE_CODE (newdecl) == TEMPLATE_DECL)
2121 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
2123 if (COMPLETE_TYPE_P (TREE_TYPE (newdecl))
2124 && COMPLETE_TYPE_P (TREE_TYPE (olddecl)))
2125 return "redefinition of %q#D";
2129 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) != FUNCTION_DECL
2130 || (DECL_TEMPLATE_RESULT (newdecl)
2131 == DECL_TEMPLATE_RESULT (olddecl)))
2134 nt = DECL_TEMPLATE_RESULT (newdecl);
2135 if (DECL_TEMPLATE_INFO (nt))
2136 nt = DECL_TEMPLATE_RESULT (template_for_substitution (nt));
2137 ot = DECL_TEMPLATE_RESULT (olddecl);
2138 if (DECL_TEMPLATE_INFO (ot))
2139 ot = DECL_TEMPLATE_RESULT (template_for_substitution (ot));
2140 if (DECL_INITIAL (nt) && DECL_INITIAL (ot))
2141 return "redefinition of %q#D";
2145 else if (TREE_CODE (newdecl) == VAR_DECL
2146 && DECL_THREAD_LOCAL_P (newdecl) != DECL_THREAD_LOCAL_P (olddecl)
2147 && (! DECL_LANG_SPECIFIC (olddecl)
2148 || ! CP_DECL_THREADPRIVATE_P (olddecl)
2149 || DECL_THREAD_LOCAL_P (newdecl)))
2151 /* Only variables can be thread-local, and all declarations must
2152 agree on this property. */
2153 if (DECL_THREAD_LOCAL_P (newdecl))
2154 return "thread-local declaration of %q#D follows "
2155 "non-thread-local declaration";
2157 return "non-thread-local declaration of %q#D follows "
2158 "thread-local declaration";
2160 else if (toplevel_bindings_p () || DECL_NAMESPACE_SCOPE_P (newdecl))
2162 /* Objects declared at top level: */
2163 /* If at least one is a reference, it's ok. */
2164 if (DECL_EXTERNAL (newdecl) || DECL_EXTERNAL (olddecl))
2166 /* Reject two definitions. */
2167 return "redefinition of %q#D";
2171 /* Objects declared with block scope: */
2172 /* Reject two definitions, and reject a definition
2173 together with an external reference. */
2174 if (!(DECL_EXTERNAL (newdecl) && DECL_EXTERNAL (olddecl)))
2175 return "redeclaration of %q#D";
2180 /* Hash and equality functions for the named_label table. */
2183 named_label_entry_hash (const void *data)
2185 const struct named_label_entry *ent = (const struct named_label_entry *) data;
2186 return DECL_UID (ent->label_decl);
2190 named_label_entry_eq (const void *a, const void *b)
2192 const struct named_label_entry *ent_a = (const struct named_label_entry *) a;
2193 const struct named_label_entry *ent_b = (const struct named_label_entry *) b;
2194 return ent_a->label_decl == ent_b->label_decl;
2197 /* Create a new label, named ID. */
2200 make_label_decl (tree id, int local_p)
2202 struct named_label_entry *ent;
2206 decl = build_decl (LABEL_DECL, id, void_type_node);
2208 DECL_CONTEXT (decl) = current_function_decl;
2209 DECL_MODE (decl) = VOIDmode;
2210 C_DECLARED_LABEL_FLAG (decl) = local_p;
2212 /* Say where one reference is to the label, for the sake of the
2213 error if it is not defined. */
2214 DECL_SOURCE_LOCATION (decl) = input_location;
2216 /* Record the fact that this identifier is bound to this label. */
2217 SET_IDENTIFIER_LABEL_VALUE (id, decl);
2219 /* Create the label htab for the function on demand. */
2221 named_labels = htab_create_ggc (13, named_label_entry_hash,
2222 named_label_entry_eq, NULL);
2224 /* Record this label on the list of labels used in this function.
2225 We do this before calling make_label_decl so that we get the
2226 IDENTIFIER_LABEL_VALUE before the new label is declared. */
2227 ent = GGC_CNEW (struct named_label_entry);
2228 ent->label_decl = decl;
2230 slot = htab_find_slot (named_labels, ent, INSERT);
2231 gcc_assert (*slot == NULL);
2237 /* Look for a label named ID in the current function. If one cannot
2238 be found, create one. (We keep track of used, but undefined,
2239 labels, and complain about them at the end of a function.) */
2242 lookup_label (tree id)
2246 timevar_push (TV_NAME_LOOKUP);
2247 /* You can't use labels at global scope. */
2248 if (current_function_decl == NULL_TREE)
2250 error ("label %qE referenced outside of any function", id);
2251 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, NULL_TREE);
2254 /* See if we've already got this label. */
2255 decl = IDENTIFIER_LABEL_VALUE (id);
2256 if (decl != NULL_TREE && DECL_CONTEXT (decl) == current_function_decl)
2257 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2259 decl = make_label_decl (id, /*local_p=*/0);
2260 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2263 /* Declare a local label named ID. */
2266 declare_local_label (tree id)
2270 /* Add a new entry to the SHADOWED_LABELS list so that when we leave
2271 this scope we can restore the old value of IDENTIFIER_TYPE_VALUE. */
2272 shadow = tree_cons (IDENTIFIER_LABEL_VALUE (id), NULL_TREE,
2273 current_binding_level->shadowed_labels);
2274 current_binding_level->shadowed_labels = shadow;
2276 decl = make_label_decl (id, /*local_p=*/1);
2277 TREE_VALUE (shadow) = decl;
2282 /* Returns nonzero if it is ill-formed to jump past the declaration of
2283 DECL. Returns 2 if it's also a real problem. */
2286 decl_jump_unsafe (tree decl)
2288 if (TREE_CODE (decl) != VAR_DECL || TREE_STATIC (decl)
2289 || TREE_TYPE (decl) == error_mark_node)
2292 if (TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl))
2293 || DECL_NONTRIVIALLY_INITIALIZED_P (decl))
2296 if (pod_type_p (TREE_TYPE (decl)))
2299 /* The POD stuff is just pedantry; why should it matter if the class
2300 contains a field of pointer to member type? */
2304 /* A subroutine of check_previous_goto_1 to identify a branch to the user. */
2307 identify_goto (tree decl, const location_t *locus)
2310 pedwarn ("jump to label %qD", decl);
2312 pedwarn ("jump to case label");
2314 pedwarn ("%H from here", locus);
2317 /* Check that a single previously seen jump to a newly defined label
2318 is OK. DECL is the LABEL_DECL or 0; LEVEL is the binding_level for
2319 the jump context; NAMES are the names in scope in LEVEL at the jump
2320 context; LOCUS is the source position of the jump or 0. Returns
2321 true if all is well. */
2324 check_previous_goto_1 (tree decl, struct cp_binding_level* level, tree names,
2325 bool exited_omp, const location_t *locus)
2327 struct cp_binding_level *b;
2328 bool identified = false, saw_eh = false, saw_omp = false;
2332 identify_goto (decl, locus);
2333 error (" exits OpenMP structured block");
2334 identified = saw_omp = true;
2337 for (b = current_binding_level; b ; b = b->level_chain)
2339 tree new_decls, old_decls = (b == level ? names : NULL_TREE);
2341 for (new_decls = b->names; new_decls != old_decls;
2342 new_decls = TREE_CHAIN (new_decls))
2344 int problem = decl_jump_unsafe (new_decls);
2350 identify_goto (decl, locus);
2354 error (" crosses initialization of %q+#D", new_decls);
2356 pedwarn (" enters scope of non-POD %q+#D", new_decls);
2361 if ((b->kind == sk_try || b->kind == sk_catch) && !saw_eh)
2365 identify_goto (decl, locus);
2368 if (b->kind == sk_try)
2369 error (" enters try block");
2371 error (" enters catch block");
2374 if (b->kind == sk_omp && !saw_omp)
2378 identify_goto (decl, locus);
2381 error (" enters OpenMP structured block");
2390 check_previous_goto (tree decl, struct named_label_use_entry *use)
2392 check_previous_goto_1 (decl, use->binding_level,
2393 use->names_in_scope, use->in_omp_scope,
2394 &use->o_goto_locus);
2398 check_switch_goto (struct cp_binding_level* level)
2400 return check_previous_goto_1 (NULL_TREE, level, level->names, false, NULL);
2403 /* Check that a new jump to a label DECL is OK. Called by
2404 finish_goto_stmt. */
2407 check_goto (tree decl)
2409 struct named_label_entry *ent, dummy;
2410 bool saw_catch = false, identified = false;
2413 /* We can't know where a computed goto is jumping.
2414 So we assume that it's OK. */
2415 if (TREE_CODE (decl) != LABEL_DECL)
2418 /* We didn't record any information about this label when we created it,
2419 and there's not much point since it's trivial to analyze as a return. */
2420 if (decl == cdtor_label)
2423 dummy.label_decl = decl;
2424 ent = (struct named_label_entry *) htab_find (named_labels, &dummy);
2425 gcc_assert (ent != NULL);
2427 /* If the label hasn't been defined yet, defer checking. */
2428 if (! DECL_INITIAL (decl))
2430 struct named_label_use_entry *new_use;
2432 /* Don't bother creating another use if the last goto had the
2433 same data, and will therefore create the same set of errors. */
2435 && ent->uses->names_in_scope == current_binding_level->names)
2438 new_use = GGC_NEW (struct named_label_use_entry);
2439 new_use->binding_level = current_binding_level;
2440 new_use->names_in_scope = current_binding_level->names;
2441 new_use->o_goto_locus = input_location;
2442 new_use->in_omp_scope = false;
2444 new_use->next = ent->uses;
2445 ent->uses = new_use;
2449 if (ent->in_try_scope || ent->in_catch_scope
2450 || ent->in_omp_scope || ent->bad_decls)
2452 pedwarn ("jump to label %q+D", decl);
2453 pedwarn (" from here");
2457 for (bad = ent->bad_decls; bad; bad = TREE_CHAIN (bad))
2459 tree b = TREE_VALUE (bad);
2460 int u = decl_jump_unsafe (b);
2462 if (u > 1 && DECL_ARTIFICIAL (b))
2464 /* Can't skip init of __exception_info. */
2465 error ("%J enters catch block", b);
2469 error (" skips initialization of %q+#D", b);
2471 pedwarn (" enters scope of non-POD %q+#D", b);
2474 if (ent->in_try_scope)
2475 error (" enters try block");
2476 else if (ent->in_catch_scope && !saw_catch)
2477 error (" enters catch block");
2479 if (ent->in_omp_scope)
2480 error (" enters OpenMP structured block");
2481 else if (flag_openmp)
2483 struct cp_binding_level *b;
2484 for (b = current_binding_level; b ; b = b->level_chain)
2486 if (b == ent->binding_level)
2488 if (b->kind == sk_omp)
2492 pedwarn ("jump to label %q+D", decl);
2493 pedwarn (" from here");
2496 error (" exits OpenMP structured block");
2503 /* Check that a return is ok wrt OpenMP structured blocks.
2504 Called by finish_return_stmt. Returns true if all is well. */
2507 check_omp_return (void)
2509 struct cp_binding_level *b;
2510 for (b = current_binding_level; b ; b = b->level_chain)
2511 if (b->kind == sk_omp)
2513 error ("invalid exit from OpenMP structured block");
2519 /* Define a label, specifying the location in the source file.
2520 Return the LABEL_DECL node for the label. */
2523 define_label (location_t location, tree name)
2525 struct named_label_entry *ent, dummy;
2526 struct cp_binding_level *p;
2529 timevar_push (TV_NAME_LOOKUP);
2531 decl = lookup_label (name);
2533 dummy.label_decl = decl;
2534 ent = (struct named_label_entry *) htab_find (named_labels, &dummy);
2535 gcc_assert (ent != NULL);
2537 /* After labels, make any new cleanups in the function go into their
2538 own new (temporary) binding contour. */
2539 for (p = current_binding_level;
2540 p->kind != sk_function_parms;
2542 p->more_cleanups_ok = 0;
2544 if (name == get_identifier ("wchar_t"))
2545 pedwarn ("label named wchar_t");
2547 if (DECL_INITIAL (decl) != NULL_TREE)
2549 error ("duplicate label %qD", decl);
2550 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
2554 struct named_label_use_entry *use;
2556 /* Mark label as having been defined. */
2557 DECL_INITIAL (decl) = error_mark_node;
2558 /* Say where in the source. */
2559 DECL_SOURCE_LOCATION (decl) = location;
2561 ent->binding_level = current_binding_level;
2562 ent->names_in_scope = current_binding_level->names;
2564 for (use = ent->uses; use ; use = use->next)
2565 check_previous_goto (decl, use);
2569 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2574 struct cp_binding_level *level;
2575 struct cp_switch *next;
2576 /* The SWITCH_STMT being built. */
2578 /* A splay-tree mapping the low element of a case range to the high
2579 element, or NULL_TREE if there is no high element. Used to
2580 determine whether or not a new case label duplicates an old case
2581 label. We need a tree, rather than simply a hash table, because
2582 of the GNU case range extension. */
2586 /* A stack of the currently active switch statements. The innermost
2587 switch statement is on the top of the stack. There is no need to
2588 mark the stack for garbage collection because it is only active
2589 during the processing of the body of a function, and we never
2590 collect at that point. */
2592 static struct cp_switch *switch_stack;
2594 /* Called right after a switch-statement condition is parsed.
2595 SWITCH_STMT is the switch statement being parsed. */
2598 push_switch (tree switch_stmt)
2600 struct cp_switch *p = XNEW (struct cp_switch);
2601 p->level = current_binding_level;
2602 p->next = switch_stack;
2603 p->switch_stmt = switch_stmt;
2604 p->cases = splay_tree_new (case_compare, NULL, NULL);
2611 struct cp_switch *cs = switch_stack;
2612 location_t switch_location;
2614 /* Emit warnings as needed. */
2615 if (EXPR_HAS_LOCATION (cs->switch_stmt))
2616 switch_location = EXPR_LOCATION (cs->switch_stmt);
2618 switch_location = input_location;
2619 if (!processing_template_decl)
2620 c_do_switch_warnings (cs->cases, switch_location,
2621 SWITCH_STMT_TYPE (cs->switch_stmt),
2622 SWITCH_STMT_COND (cs->switch_stmt));
2624 splay_tree_delete (cs->cases);
2625 switch_stack = switch_stack->next;
2629 /* Note that we've seen a definition of a case label, and complain if this
2630 is a bad place for one. */
2633 finish_case_label (tree low_value, tree high_value)
2636 struct cp_binding_level *p;
2638 if (processing_template_decl)
2642 /* For templates, just add the case label; we'll do semantic
2643 analysis at instantiation-time. */
2644 label = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
2645 return add_stmt (build_case_label (low_value, high_value, label));
2648 /* Find the condition on which this switch statement depends. */
2649 cond = SWITCH_STMT_COND (switch_stack->switch_stmt);
2650 if (cond && TREE_CODE (cond) == TREE_LIST)
2651 cond = TREE_VALUE (cond);
2653 if (!check_switch_goto (switch_stack->level))
2654 return error_mark_node;
2656 r = c_add_case_label (switch_stack->cases, cond, TREE_TYPE (cond),
2657 low_value, high_value);
2659 /* After labels, make any new cleanups in the function go into their
2660 own new (temporary) binding contour. */
2661 for (p = current_binding_level;
2662 p->kind != sk_function_parms;
2664 p->more_cleanups_ok = 0;
2669 /* Hash a TYPENAME_TYPE. K is really of type `tree'. */
2672 typename_hash (const void* k)
2677 hash = (htab_hash_pointer (TYPE_CONTEXT (t))
2678 ^ htab_hash_pointer (DECL_NAME (TYPE_NAME (t))));
2683 typedef struct typename_info {
2691 /* Compare two TYPENAME_TYPEs. K1 and K2 are really of type `tree'. */
2694 typename_compare (const void * k1, const void * k2)
2697 const typename_info *t2;
2700 t2 = (const typename_info *) k2;
2702 return (DECL_NAME (TYPE_NAME (t1)) == t2->name
2703 && TYPE_CONTEXT (t1) == t2->scope
2704 && TYPENAME_TYPE_FULLNAME (t1) == t2->template_id
2705 && TYPENAME_IS_ENUM_P (t1) == t2->enum_p
2706 && TYPENAME_IS_CLASS_P (t1) == t2->class_p);
2709 /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
2710 the type of `T', NAME is the IDENTIFIER_NODE for `t'.
2712 Returns the new TYPENAME_TYPE. */
2714 static GTY ((param_is (union tree_node))) htab_t typename_htab;
2717 build_typename_type (tree context, tree name, tree fullname,
2718 enum tag_types tag_type)
2726 if (typename_htab == NULL)
2727 typename_htab = htab_create_ggc (61, &typename_hash,
2728 &typename_compare, NULL);
2730 ti.scope = FROB_CONTEXT (context);
2732 ti.template_id = fullname;
2733 ti.enum_p = tag_type == enum_type;
2734 ti.class_p = (tag_type == class_type
2735 || tag_type == record_type
2736 || tag_type == union_type);
2737 hash = (htab_hash_pointer (ti.scope)
2738 ^ htab_hash_pointer (ti.name));
2740 /* See if we already have this type. */
2741 e = htab_find_slot_with_hash (typename_htab, &ti, hash, INSERT);
2746 /* Build the TYPENAME_TYPE. */
2747 t = make_aggr_type (TYPENAME_TYPE);
2748 TYPE_CONTEXT (t) = ti.scope;
2749 TYPENAME_TYPE_FULLNAME (t) = ti.template_id;
2750 TYPENAME_IS_ENUM_P (t) = ti.enum_p;
2751 TYPENAME_IS_CLASS_P (t) = ti.class_p;
2753 /* Build the corresponding TYPE_DECL. */
2754 d = build_decl (TYPE_DECL, name, t);
2755 TYPE_NAME (TREE_TYPE (d)) = d;
2756 TYPE_STUB_DECL (TREE_TYPE (d)) = d;
2757 DECL_CONTEXT (d) = FROB_CONTEXT (context);
2758 DECL_ARTIFICIAL (d) = 1;
2760 /* Store it in the hash table. */
2767 /* Resolve `typename CONTEXT::NAME'. TAG_TYPE indicates the tag
2768 provided to name the type. Returns an appropriate type, unless an
2769 error occurs, in which case error_mark_node is returned. If we
2770 locate a non-artificial TYPE_DECL and TF_KEEP_TYPE_DECL is set, we
2771 return that, rather than the _TYPE it corresponds to, in other
2772 cases we look through the type decl. If TF_ERROR is set, complain
2773 about errors, otherwise be quiet. */
2776 make_typename_type (tree context, tree name, enum tag_types tag_type,
2777 tsubst_flags_t complain)
2783 if (name == error_mark_node
2784 || context == NULL_TREE
2785 || context == error_mark_node)
2786 return error_mark_node;
2790 if (!(TYPE_LANG_SPECIFIC (name)
2791 && (CLASSTYPE_IS_TEMPLATE (name)
2792 || CLASSTYPE_USE_TEMPLATE (name))))
2793 name = TYPE_IDENTIFIER (name);
2795 /* Create a TEMPLATE_ID_EXPR for the type. */
2796 name = build_nt (TEMPLATE_ID_EXPR,
2797 CLASSTYPE_TI_TEMPLATE (name),
2798 CLASSTYPE_TI_ARGS (name));
2800 else if (TREE_CODE (name) == TYPE_DECL)
2801 name = DECL_NAME (name);
2805 if (TREE_CODE (name) == TEMPLATE_ID_EXPR)
2807 name = TREE_OPERAND (name, 0);
2808 if (TREE_CODE (name) == TEMPLATE_DECL)
2809 name = TREE_OPERAND (fullname, 0) = DECL_NAME (name);
2811 if (TREE_CODE (name) == TEMPLATE_DECL)
2813 error ("%qD used without template parameters", name);
2814 return error_mark_node;
2816 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
2817 gcc_assert (TYPE_P (context));
2819 /* When the CONTEXT is a dependent type, NAME could refer to a
2820 dependent base class of CONTEXT. So we cannot peek inside it,
2821 even if CONTEXT is a currently open scope. */
2822 if (dependent_type_p (context))
2823 return build_typename_type (context, name, fullname, tag_type);
2825 if (!IS_AGGR_TYPE (context))
2827 if (complain & tf_error)
2828 error ("%q#T is not a class", context);
2829 return error_mark_node;
2832 want_template = TREE_CODE (fullname) == TEMPLATE_ID_EXPR;
2834 /* We should only set WANT_TYPE when we're a nested typename type.
2835 Then we can give better diagnostics if we find a non-type. */
2836 t = lookup_field (context, name, 0, /*want_type=*/true);
2839 if (complain & tf_error)
2840 error (want_template ? "no class template named %q#T in %q#T"
2841 : "no type named %q#T in %q#T", name, context);
2842 return error_mark_node;
2845 if (want_template && !DECL_CLASS_TEMPLATE_P (t))
2847 if (complain & tf_error)
2848 error ("%<typename %T::%D%> names %q#T, which is not a class template",
2850 return error_mark_node;
2852 if (!want_template && TREE_CODE (t) != TYPE_DECL)
2854 if (complain & tf_error)
2855 error ("%<typename %T::%D%> names %q#T, which is not a type",
2857 return error_mark_node;
2860 if (complain & tf_error)
2861 perform_or_defer_access_check (TYPE_BINFO (context), t);
2864 return lookup_template_class (t, TREE_OPERAND (fullname, 1),
2866 /*entering_scope=*/0,
2867 tf_warning_or_error | tf_user);
2869 if (DECL_ARTIFICIAL (t) || !(complain & tf_keep_type_decl))
2875 /* Resolve `CONTEXT::template NAME'. Returns a TEMPLATE_DECL if the name
2876 can be resolved or an UNBOUND_CLASS_TEMPLATE, unless an error occurs,
2877 in which case error_mark_node is returned.
2879 If PARM_LIST is non-NULL, also make sure that the template parameter
2880 list of TEMPLATE_DECL matches.
2882 If COMPLAIN zero, don't complain about any errors that occur. */
2885 make_unbound_class_template (tree context, tree name, tree parm_list,
2886 tsubst_flags_t complain)
2892 name = TYPE_IDENTIFIER (name);
2893 else if (DECL_P (name))
2894 name = DECL_NAME (name);
2895 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
2897 if (!dependent_type_p (context)
2898 || currently_open_class (context))
2900 tree tmpl = NULL_TREE;
2902 if (IS_AGGR_TYPE (context))
2903 tmpl = lookup_field (context, name, 0, false);
2905 if (!tmpl || !DECL_CLASS_TEMPLATE_P (tmpl))
2907 if (complain & tf_error)
2908 error ("no class template named %q#T in %q#T", name, context);
2909 return error_mark_node;
2913 && !comp_template_parms (DECL_TEMPLATE_PARMS (tmpl), parm_list))
2915 if (complain & tf_error)
2917 error ("template parameters do not match template");
2918 error ("%q+D declared here", tmpl);
2920 return error_mark_node;
2923 if (complain & tf_error)
2924 perform_or_defer_access_check (TYPE_BINFO (context), tmpl);
2929 /* Build the UNBOUND_CLASS_TEMPLATE. */
2930 t = make_aggr_type (UNBOUND_CLASS_TEMPLATE);
2931 TYPE_CONTEXT (t) = FROB_CONTEXT (context);
2932 TREE_TYPE (t) = NULL_TREE;
2934 /* Build the corresponding TEMPLATE_DECL. */
2935 d = build_decl (TEMPLATE_DECL, name, t);
2936 TYPE_NAME (TREE_TYPE (d)) = d;
2937 TYPE_STUB_DECL (TREE_TYPE (d)) = d;
2938 DECL_CONTEXT (d) = FROB_CONTEXT (context);
2939 DECL_ARTIFICIAL (d) = 1;
2940 DECL_TEMPLATE_PARMS (d) = parm_list;
2947 /* Push the declarations of builtin types into the namespace.
2948 RID_INDEX is the index of the builtin type in the array
2949 RID_POINTERS. NAME is the name used when looking up the builtin
2950 type. TYPE is the _TYPE node for the builtin type. */
2953 record_builtin_type (enum rid rid_index,
2957 tree rname = NULL_TREE, tname = NULL_TREE;
2958 tree tdecl = NULL_TREE;
2960 if ((int) rid_index < (int) RID_MAX)
2961 rname = ridpointers[(int) rid_index];
2963 tname = get_identifier (name);
2965 /* The calls to SET_IDENTIFIER_GLOBAL_VALUE below should be
2966 eliminated. Built-in types should not be looked up name; their
2967 names are keywords that the parser can recognize. However, there
2968 is code in c-common.c that uses identifier_global_value to look
2969 up built-in types by name. */
2972 tdecl = build_decl (TYPE_DECL, tname, type);
2973 DECL_ARTIFICIAL (tdecl) = 1;
2974 SET_IDENTIFIER_GLOBAL_VALUE (tname, tdecl);
2980 tdecl = build_decl (TYPE_DECL, rname, type);
2981 DECL_ARTIFICIAL (tdecl) = 1;
2983 SET_IDENTIFIER_GLOBAL_VALUE (rname, tdecl);
2986 if (!TYPE_NAME (type))
2987 TYPE_NAME (type) = tdecl;
2990 debug_hooks->type_decl (tdecl, 0);
2993 /* Record one of the standard Java types.
2994 * Declare it as having the given NAME.
2995 * If SIZE > 0, it is the size of one of the integral types;
2996 * otherwise it is the negative of the size of one of the other types. */
2999 record_builtin_java_type (const char* name, int size)
3003 type = make_signed_type (size);
3004 else if (size > -32)
3005 { /* "__java_char" or ""__java_boolean". */
3006 type = make_unsigned_type (-size);
3007 /*if (size == -1) TREE_SET_CODE (type, BOOLEAN_TYPE);*/
3010 { /* "__java_float" or ""__java_double". */
3011 type = make_node (REAL_TYPE);
3012 TYPE_PRECISION (type) = - size;
3015 record_builtin_type (RID_MAX, name, type);
3016 decl = TYPE_NAME (type);
3018 /* Suppress generate debug symbol entries for these types,
3019 since for normal C++ they are just clutter.
3020 However, push_lang_context undoes this if extern "Java" is seen. */
3021 DECL_IGNORED_P (decl) = 1;
3023 TYPE_FOR_JAVA (type) = 1;
3027 /* Push a type into the namespace so that the back-ends ignore it. */
3030 record_unknown_type (tree type, const char* name)
3032 tree decl = pushdecl (build_decl (TYPE_DECL, get_identifier (name), type));
3033 /* Make sure the "unknown type" typedecl gets ignored for debug info. */
3034 DECL_IGNORED_P (decl) = 1;
3035 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
3036 TYPE_SIZE (type) = TYPE_SIZE (void_type_node);
3037 TYPE_ALIGN (type) = 1;
3038 TYPE_USER_ALIGN (type) = 0;
3039 TYPE_MODE (type) = TYPE_MODE (void_type_node);
3042 /* A string for which we should create an IDENTIFIER_NODE at
3045 typedef struct predefined_identifier
3047 /* The name of the identifier. */
3048 const char *const name;
3049 /* The place where the IDENTIFIER_NODE should be stored. */
3051 /* Nonzero if this is the name of a constructor or destructor. */
3052 const int ctor_or_dtor_p;
3053 } predefined_identifier;
3055 /* Create all the predefined identifiers. */
3058 initialize_predefined_identifiers (void)
3060 const predefined_identifier *pid;
3062 /* A table of identifiers to create at startup. */
3063 static const predefined_identifier predefined_identifiers[] = {
3064 { "C++", &lang_name_cplusplus, 0 },
3065 { "C", &lang_name_c, 0 },
3066 { "Java", &lang_name_java, 0 },
3067 /* Some of these names have a trailing space so that it is
3068 impossible for them to conflict with names written by users. */
3069 { "__ct ", &ctor_identifier, 1 },
3070 { "__base_ctor ", &base_ctor_identifier, 1 },
3071 { "__comp_ctor ", &complete_ctor_identifier, 1 },
3072 { "__dt ", &dtor_identifier, 1 },
3073 { "__comp_dtor ", &complete_dtor_identifier, 1 },
3074 { "__base_dtor ", &base_dtor_identifier, 1 },
3075 { "__deleting_dtor ", &deleting_dtor_identifier, 1 },
3076 { IN_CHARGE_NAME, &in_charge_identifier, 0 },
3077 { "nelts", &nelts_identifier, 0 },
3078 { THIS_NAME, &this_identifier, 0 },
3079 { VTABLE_DELTA_NAME, &delta_identifier, 0 },
3080 { VTABLE_PFN_NAME, &pfn_identifier, 0 },
3081 { "_vptr", &vptr_identifier, 0 },
3082 { "__vtt_parm", &vtt_parm_identifier, 0 },
3083 { "::", &global_scope_name, 0 },
3084 { "std", &std_identifier, 0 },
3088 for (pid = predefined_identifiers; pid->name; ++pid)
3090 *pid->node = get_identifier (pid->name);
3091 if (pid->ctor_or_dtor_p)
3092 IDENTIFIER_CTOR_OR_DTOR_P (*pid->node) = 1;
3096 /* Create the predefined scalar types of C,
3097 and some nodes representing standard constants (0, 1, (void *)0).
3098 Initialize the global binding level.
3099 Make definitions for built-in primitive functions. */
3102 cxx_init_decl_processing (void)
3105 tree void_ftype_ptr;
3107 build_common_tree_nodes (flag_signed_char, false);
3109 /* Create all the identifiers we need. */
3110 initialize_predefined_identifiers ();
3112 /* Create the global variables. */
3113 push_to_top_level ();
3115 current_function_decl = NULL_TREE;
3116 current_binding_level = NULL;
3117 /* Enter the global namespace. */
3118 gcc_assert (global_namespace == NULL_TREE);
3119 global_namespace = build_lang_decl (NAMESPACE_DECL, global_scope_name,
3121 TREE_PUBLIC (global_namespace) = 1;
3122 begin_scope (sk_namespace, global_namespace);
3124 current_lang_name = NULL_TREE;
3126 /* Adjust various flags based on command-line settings. */
3127 if (!flag_permissive)
3128 flag_pedantic_errors = 1;
3129 if (!flag_no_inline)
3131 flag_inline_trees = 1;
3134 if (flag_inline_functions)
3135 flag_inline_trees = 2;
3137 /* Force minimum function alignment if using the least significant
3138 bit of function pointers to store the virtual bit. */
3139 if (TARGET_PTRMEMFUNC_VBIT_LOCATION == ptrmemfunc_vbit_in_pfn
3140 && force_align_functions_log < 1)
3141 force_align_functions_log = 1;
3144 current_lang_name = lang_name_c;
3146 /* Create the `std' namespace. */
3147 push_namespace (std_identifier);
3148 std_node = current_namespace;
3151 c_common_nodes_and_builtins ();
3153 java_byte_type_node = record_builtin_java_type ("__java_byte", 8);
3154 java_short_type_node = record_builtin_java_type ("__java_short", 16);
3155 java_int_type_node = record_builtin_java_type ("__java_int", 32);
3156 java_long_type_node = record_builtin_java_type ("__java_long", 64);
3157 java_float_type_node = record_builtin_java_type ("__java_float", -32);
3158 java_double_type_node = record_builtin_java_type ("__java_double", -64);
3159 java_char_type_node = record_builtin_java_type ("__java_char", -16);
3160 java_boolean_type_node = record_builtin_java_type ("__java_boolean", -1);
3162 integer_two_node = build_int_cst (NULL_TREE, 2);
3163 integer_three_node = build_int_cst (NULL_TREE, 3);
3165 record_builtin_type (RID_BOOL, "bool", boolean_type_node);
3166 truthvalue_type_node = boolean_type_node;
3167 truthvalue_false_node = boolean_false_node;
3168 truthvalue_true_node = boolean_true_node;
3170 empty_except_spec = build_tree_list (NULL_TREE, NULL_TREE);
3173 record_builtin_type (RID_MAX, NULL, string_type_node);
3176 delta_type_node = ptrdiff_type_node;
3177 vtable_index_type = ptrdiff_type_node;
3179 vtt_parm_type = build_pointer_type (const_ptr_type_node);
3180 void_ftype = build_function_type (void_type_node, void_list_node);
3181 void_ftype_ptr = build_function_type (void_type_node,
3182 tree_cons (NULL_TREE,
3186 = build_exception_variant (void_ftype_ptr, empty_except_spec);
3188 /* C++ extensions */
3190 unknown_type_node = make_node (UNKNOWN_TYPE);
3191 record_unknown_type (unknown_type_node, "unknown type");
3193 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
3194 TREE_TYPE (unknown_type_node) = unknown_type_node;
3196 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
3198 TYPE_POINTER_TO (unknown_type_node) = unknown_type_node;
3199 TYPE_REFERENCE_TO (unknown_type_node) = unknown_type_node;
3202 /* Make sure we get a unique function type, so we can give
3203 its pointer type a name. (This wins for gdb.) */
3204 tree vfunc_type = make_node (FUNCTION_TYPE);
3205 TREE_TYPE (vfunc_type) = integer_type_node;
3206 TYPE_ARG_TYPES (vfunc_type) = NULL_TREE;
3207 layout_type (vfunc_type);
3209 vtable_entry_type = build_pointer_type (vfunc_type);
3211 record_builtin_type (RID_MAX, VTBL_PTR_TYPE, vtable_entry_type);
3214 = build_cplus_array_type (vtable_entry_type, NULL_TREE);
3215 layout_type (vtbl_type_node);
3216 vtbl_type_node = build_qualified_type (vtbl_type_node, TYPE_QUAL_CONST);
3217 record_builtin_type (RID_MAX, NULL, vtbl_type_node);
3218 vtbl_ptr_type_node = build_pointer_type (vtable_entry_type);
3219 layout_type (vtbl_ptr_type_node);
3220 record_builtin_type (RID_MAX, NULL, vtbl_ptr_type_node);
3222 push_namespace (get_identifier ("__cxxabiv1"));
3223 abi_node = current_namespace;
3226 global_type_node = make_node (LANG_TYPE);
3227 record_unknown_type (global_type_node, "global type");
3230 current_lang_name = lang_name_cplusplus;
3234 tree bad_alloc_type_node;
3235 tree bad_alloc_decl;
3236 tree newtype, deltype;
3237 tree ptr_ftype_sizetype;
3239 push_namespace (std_identifier);
3240 bad_alloc_id = get_identifier ("bad_alloc");
3241 bad_alloc_type_node = make_aggr_type (RECORD_TYPE);
3242 TYPE_CONTEXT (bad_alloc_type_node) = current_namespace;
3244 = create_implicit_typedef (bad_alloc_id, bad_alloc_type_node);
3245 DECL_CONTEXT (bad_alloc_decl) = current_namespace;
3246 TYPE_STUB_DECL (bad_alloc_type_node) = bad_alloc_decl;
3250 = build_function_type (ptr_type_node,
3251 tree_cons (NULL_TREE,
3254 newtype = build_exception_variant
3255 (ptr_ftype_sizetype, add_exception_specifier
3256 (NULL_TREE, bad_alloc_type_node, -1));
3257 deltype = build_exception_variant (void_ftype_ptr, empty_except_spec);
3258 push_cp_library_fn (NEW_EXPR, newtype);
3259 push_cp_library_fn (VEC_NEW_EXPR, newtype);
3260 global_delete_fndecl = push_cp_library_fn (DELETE_EXPR, deltype);
3261 push_cp_library_fn (VEC_DELETE_EXPR, deltype);
3265 = build_library_fn_ptr ("__cxa_pure_virtual", void_ftype);
3267 /* Perform other language dependent initializations. */
3268 init_class_processing ();
3269 init_rtti_processing ();
3271 if (flag_exceptions)
3272 init_exception_processing ();
3274 if (! supports_one_only ())
3277 make_fname_decl = cp_make_fname_decl;
3278 start_fname_decls ();
3280 /* Show we use EH for cleanups. */
3281 if (flag_exceptions)
3282 using_eh_for_cleanups ();
3285 /* Generate an initializer for a function naming variable from
3286 NAME. NAME may be NULL, to indicate a dependent name. TYPE_P is
3287 filled in with the type of the init. */
3290 cp_fname_init (const char* name, tree *type_p)
3292 tree domain = NULL_TREE;
3294 tree init = NULL_TREE;
3299 length = strlen (name);
3300 domain = build_index_type (size_int (length));
3301 init = build_string (length + 1, name);
3304 type = build_qualified_type (char_type_node, TYPE_QUAL_CONST);
3305 type = build_cplus_array_type (type, domain);
3310 TREE_TYPE (init) = type;
3312 init = error_mark_node;
3317 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give the
3318 decl, NAME is the initialization string and TYPE_DEP indicates whether
3319 NAME depended on the type of the function. We make use of that to detect
3320 __PRETTY_FUNCTION__ inside a template fn. This is being done
3321 lazily at the point of first use, so we mustn't push the decl now. */
3324 cp_make_fname_decl (tree id, int type_dep)
3326 const char *const name = (type_dep && processing_template_decl
3327 ? NULL : fname_as_string (type_dep));
3329 tree init = cp_fname_init (name, &type);
3330 tree decl = build_decl (VAR_DECL, id, type);
3333 free ((char *) name);
3335 /* As we're using pushdecl_with_scope, we must set the context. */
3336 DECL_CONTEXT (decl) = current_function_decl;
3337 DECL_PRETTY_FUNCTION_P (decl) = type_dep;
3339 TREE_STATIC (decl) = 1;
3340 TREE_READONLY (decl) = 1;
3341 DECL_ARTIFICIAL (decl) = 1;
3343 TREE_USED (decl) = 1;
3345 if (current_function_decl)
3347 struct cp_binding_level *b = current_binding_level;
3348 while (b->level_chain->kind != sk_function_parms)
3350 pushdecl_with_scope (decl, b, /*is_friend=*/false);
3351 cp_finish_decl (decl, init, /*init_const_expr_p=*/false, NULL_TREE,
3352 LOOKUP_ONLYCONVERTING);
3355 pushdecl_top_level_and_finish (decl, init);
3361 builtin_function_1 (tree decl, tree context)
3363 tree id = DECL_NAME (decl);
3364 const char *name = IDENTIFIER_POINTER (id);
3366 retrofit_lang_decl (decl);
3368 /* All nesting of C++ functions is lexical; there is never a "static
3369 chain" in the sense of GNU C nested functions. */
3370 DECL_NO_STATIC_CHAIN (decl) = 1;
3372 DECL_ARTIFICIAL (decl) = 1;
3373 SET_OVERLOADED_OPERATOR_CODE (decl, ERROR_MARK);
3374 SET_DECL_LANGUAGE (decl, lang_c);
3375 /* Runtime library routines are, by definition, available in an
3376 external shared object. */
3377 DECL_VISIBILITY (decl) = VISIBILITY_DEFAULT;
3378 DECL_VISIBILITY_SPECIFIED (decl) = 1;
3380 DECL_CONTEXT (decl) = context;
3384 /* A function in the user's namespace should have an explicit
3385 declaration before it is used. Mark the built-in function as
3386 anticipated but not actually declared. */
3387 if (name[0] != '_' || name[1] != '_')
3388 DECL_ANTICIPATED (decl) = 1;
3394 cxx_builtin_function (tree decl)
3396 tree id = DECL_NAME (decl);
3397 const char *name = IDENTIFIER_POINTER (id);
3398 tree decl2 = copy_node(decl);
3399 /* All builtins that don't begin with an '_' should additionally
3400 go in the 'std' namespace. */
3403 push_namespace (std_identifier);
3404 builtin_function_1 (decl, std_node);
3408 return builtin_function_1 (decl2, NULL_TREE);
3411 /* Generate a FUNCTION_DECL with the typical flags for a runtime library
3412 function. Not called directly. */
3415 build_library_fn_1 (tree name, enum tree_code operator_code, tree type)
3417 tree fn = build_lang_decl (FUNCTION_DECL, name, type);
3418 DECL_EXTERNAL (fn) = 1;
3419 TREE_PUBLIC (fn) = 1;
3420 DECL_ARTIFICIAL (fn) = 1;
3421 SET_OVERLOADED_OPERATOR_CODE (fn, operator_code);
3422 SET_DECL_LANGUAGE (fn, lang_c);
3423 /* Runtime library routines are, by definition, available in an
3424 external shared object. */
3425 DECL_VISIBILITY (fn) = VISIBILITY_DEFAULT;
3426 DECL_VISIBILITY_SPECIFIED (fn) = 1;
3430 /* Returns the _DECL for a library function with C linkage.
3431 We assume that such functions never throw; if this is incorrect,
3432 callers should unset TREE_NOTHROW. */
3435 build_library_fn (tree name, tree type)
3437 tree fn = build_library_fn_1 (name, ERROR_MARK, type);
3438 TREE_NOTHROW (fn) = 1;
3442 /* Returns the _DECL for a library function with C++ linkage. */
3445 build_cp_library_fn (tree name, enum tree_code operator_code, tree type)
3447 tree fn = build_library_fn_1 (name, operator_code, type);
3448 TREE_NOTHROW (fn) = TYPE_NOTHROW_P (type);
3449 DECL_CONTEXT (fn) = FROB_CONTEXT (current_namespace);
3450 SET_DECL_LANGUAGE (fn, lang_cplusplus);
3454 /* Like build_library_fn, but takes a C string instead of an
3458 build_library_fn_ptr (const char* name, tree type)
3460 return build_library_fn (get_identifier (name), type);
3463 /* Like build_cp_library_fn, but takes a C string instead of an
3467 build_cp_library_fn_ptr (const char* name, tree type)
3469 return build_cp_library_fn (get_identifier (name), ERROR_MARK, type);
3472 /* Like build_library_fn, but also pushes the function so that we will
3473 be able to find it via IDENTIFIER_GLOBAL_VALUE. */
3476 push_library_fn (tree name, tree type)
3478 tree fn = build_library_fn (name, type);
3479 pushdecl_top_level (fn);
3483 /* Like build_cp_library_fn, but also pushes the function so that it
3484 will be found by normal lookup. */
3487 push_cp_library_fn (enum tree_code operator_code, tree type)
3489 tree fn = build_cp_library_fn (ansi_opname (operator_code),
3496 /* Like push_library_fn, but takes a TREE_LIST of parm types rather than
3500 push_void_library_fn (tree name, tree parmtypes)
3502 tree type = build_function_type (void_type_node, parmtypes);
3503 return push_library_fn (name, type);
3506 /* Like push_library_fn, but also note that this function throws
3507 and does not return. Used for __throw_foo and the like. */
3510 push_throw_library_fn (tree name, tree type)
3512 tree fn = push_library_fn (name, type);
3513 TREE_THIS_VOLATILE (fn) = 1;
3514 TREE_NOTHROW (fn) = 0;
3518 /* When we call finish_struct for an anonymous union, we create
3519 default copy constructors and such. But, an anonymous union
3520 shouldn't have such things; this function undoes the damage to the
3521 anonymous union type T.
3523 (The reason that we create the synthesized methods is that we don't
3524 distinguish `union { int i; }' from `typedef union { int i; } U'.
3525 The first is an anonymous union; the second is just an ordinary
3529 fixup_anonymous_aggr (tree t)
3533 /* Wipe out memory of synthesized methods. */
3534 TYPE_HAS_CONSTRUCTOR (t) = 0;
3535 TYPE_HAS_DEFAULT_CONSTRUCTOR (t) = 0;
3536 TYPE_HAS_INIT_REF (t) = 0;
3537 TYPE_HAS_CONST_INIT_REF (t) = 0;
3538 TYPE_HAS_ASSIGN_REF (t) = 0;
3539 TYPE_HAS_CONST_ASSIGN_REF (t) = 0;
3541 /* Splice the implicitly generated functions out of the TYPE_METHODS
3543 q = &TYPE_METHODS (t);
3546 if (DECL_ARTIFICIAL (*q))
3547 *q = TREE_CHAIN (*q);
3549 q = &TREE_CHAIN (*q);
3552 /* ISO C++ 9.5.3. Anonymous unions may not have function members. */
3553 if (TYPE_METHODS (t))
3554 error ("%Jan anonymous union cannot have function members",
3555 TYPE_MAIN_DECL (t));
3557 /* Anonymous aggregates cannot have fields with ctors, dtors or complex
3558 assignment operators (because they cannot have these methods themselves).
3559 For anonymous unions this is already checked because they are not allowed
3560 in any union, otherwise we have to check it. */
3561 if (TREE_CODE (t) != UNION_TYPE)
3565 for (field = TYPE_FIELDS (t); field; field = TREE_CHAIN (field))
3566 if (TREE_CODE (field) == FIELD_DECL)
3568 type = TREE_TYPE (field);
3569 if (CLASS_TYPE_P (type))
3571 if (TYPE_NEEDS_CONSTRUCTING (type))
3572 error ("member %q+#D with constructor not allowed "
3573 "in anonymous aggregate", field);
3574 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
3575 error ("member %q+#D with destructor not allowed "
3576 "in anonymous aggregate", field);
3577 if (TYPE_HAS_COMPLEX_ASSIGN_REF (type))
3578 error ("member %q+#D with copy assignment operator "
3579 "not allowed in anonymous aggregate", field);
3585 /* Make sure that a declaration with no declarator is well-formed, i.e.
3586 just declares a tagged type or anonymous union.
3588 Returns the type declared; or NULL_TREE if none. */
3591 check_tag_decl (cp_decl_specifier_seq *declspecs)
3593 int saw_friend = declspecs->specs[(int)ds_friend] != 0;
3594 int saw_typedef = declspecs->specs[(int)ds_typedef] != 0;
3595 /* If a class, struct, or enum type is declared by the DECLSPECS
3596 (i.e, if a class-specifier, enum-specifier, or non-typename
3597 elaborated-type-specifier appears in the DECLSPECS),
3598 DECLARED_TYPE is set to the corresponding type. */
3599 tree declared_type = NULL_TREE;
3600 bool error_p = false;
3602 if (declspecs->multiple_types_p)
3603 error ("multiple types in one declaration");
3604 else if (declspecs->redefined_builtin_type)
3606 if (!in_system_header)
3607 pedwarn ("redeclaration of C++ built-in type %qT",
3608 declspecs->redefined_builtin_type);
3613 && TYPE_P (declspecs->type)
3614 && ((TREE_CODE (declspecs->type) != TYPENAME_TYPE
3615 && IS_AGGR_TYPE (declspecs->type))
3616 || TREE_CODE (declspecs->type) == ENUMERAL_TYPE))
3617 declared_type = declspecs->type;
3618 else if (declspecs->type == error_mark_node)
3620 if (declared_type == NULL_TREE && ! saw_friend && !error_p)
3621 pedwarn ("declaration does not declare anything");
3622 /* Check for an anonymous union. */
3623 else if (declared_type && IS_AGGR_TYPE_CODE (TREE_CODE (declared_type))
3624 && TYPE_ANONYMOUS_P (declared_type))
3626 /* 7/3 In a simple-declaration, the optional init-declarator-list
3627 can be omitted only when declaring a class (clause 9) or
3628 enumeration (7.2), that is, when the decl-specifier-seq contains
3629 either a class-specifier, an elaborated-type-specifier with
3630 a class-key (9.1), or an enum-specifier. In these cases and
3631 whenever a class-specifier or enum-specifier is present in the
3632 decl-specifier-seq, the identifiers in these specifiers are among
3633 the names being declared by the declaration (as class-name,
3634 enum-names, or enumerators, depending on the syntax). In such
3635 cases, and except for the declaration of an unnamed bit-field (9.6),
3636 the decl-specifier-seq shall introduce one or more names into the
3637 program, or shall redeclare a name introduced by a previous
3638 declaration. [Example:
3639 enum { }; // ill-formed
3640 typedef class { }; // ill-formed
3644 error ("missing type-name in typedef-declaration");
3647 /* Anonymous unions are objects, so they can have specifiers. */;
3648 SET_ANON_AGGR_TYPE_P (declared_type);
3650 if (TREE_CODE (declared_type) != UNION_TYPE && pedantic
3651 && !in_system_header)
3652 pedwarn ("ISO C++ prohibits anonymous structs");
3657 if (declspecs->specs[(int)ds_inline]
3658 || declspecs->specs[(int)ds_virtual])
3659 error ("%qs can only be specified for functions",
3660 declspecs->specs[(int)ds_inline]
3661 ? "inline" : "virtual");
3663 && (!current_class_type
3664 || current_scope () != current_class_type))
3665 error ("%<friend%> can only be specified inside a class");
3666 else if (declspecs->specs[(int)ds_explicit])
3667 error ("%<explicit%> can only be specified for constructors");
3668 else if (declspecs->storage_class)
3669 error ("a storage class can only be specified for objects "
3671 else if (declspecs->specs[(int)ds_const]
3672 || declspecs->specs[(int)ds_volatile]
3673 || declspecs->specs[(int)ds_restrict]
3674 || declspecs->specs[(int)ds_thread])
3675 error ("qualifiers can only be specified for objects "
3679 return declared_type;
3682 /* Called when a declaration is seen that contains no names to declare.
3683 If its type is a reference to a structure, union or enum inherited
3684 from a containing scope, shadow that tag name for the current scope
3685 with a forward reference.
3686 If its type defines a new named structure or union
3687 or defines an enum, it is valid but we need not do anything here.
3688 Otherwise, it is an error.
3690 C++: may have to grok the declspecs to learn about static,
3691 complain for anonymous unions.
3693 Returns the TYPE declared -- or NULL_TREE if none. */
3696 shadow_tag (cp_decl_specifier_seq *declspecs)
3698 tree t = check_tag_decl (declspecs);
3703 if (declspecs->attributes)
3705 warning (0, "attribute ignored in declaration of %q+#T", t);
3706 warning (0, "attribute for %q+#T must follow the %qs keyword",
3707 t, class_key_or_enum_as_string (t));
3711 if (maybe_process_partial_specialization (t) == error_mark_node)
3714 /* This is where the variables in an anonymous union are
3715 declared. An anonymous union declaration looks like:
3717 because there is no declarator after the union, the parser
3718 sends that declaration here. */
3719 if (ANON_AGGR_TYPE_P (t))
3721 fixup_anonymous_aggr (t);
3723 if (TYPE_FIELDS (t))
3725 tree decl = grokdeclarator (/*declarator=*/NULL,
3726 declspecs, NORMAL, 0, NULL);
3727 finish_anon_union (decl);
3734 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
3737 groktypename (cp_decl_specifier_seq *type_specifiers,
3738 const cp_declarator *declarator)
3742 attrs = type_specifiers->attributes;
3743 type_specifiers->attributes = NULL_TREE;
3744 type = grokdeclarator (declarator, type_specifiers, TYPENAME, 0, &attrs);
3746 cplus_decl_attributes (&type, attrs, 0);
3750 /* Decode a declarator in an ordinary declaration or data definition.
3751 This is called as soon as the type information and variable name
3752 have been parsed, before parsing the initializer if any.
3753 Here we create the ..._DECL node, fill in its type,
3754 and put it on the list of decls for the current context.
3755 The ..._DECL node is returned as the value.
3757 Exception: for arrays where the length is not specified,
3758 the type is left null, to be filled in by `cp_finish_decl'.
3760 Function definitions do not come here; they go to start_function
3761 instead. However, external and forward declarations of functions
3762 do go through here. Structure field declarations are done by
3763 grokfield and not through here. */
3766 start_decl (const cp_declarator *declarator,
3767 cp_decl_specifier_seq *declspecs,
3770 tree prefix_attributes,
3771 tree *pushed_scope_p)
3777 *pushed_scope_p = NULL_TREE;
3779 /* An object declared as __attribute__((deprecated)) suppresses
3780 warnings of uses of other deprecated items. */
3781 if (lookup_attribute ("deprecated", attributes))
3782 deprecated_state = DEPRECATED_SUPPRESS;
3784 attributes = chainon (attributes, prefix_attributes);
3786 decl = grokdeclarator (declarator, declspecs, NORMAL, initialized,
3789 deprecated_state = DEPRECATED_NORMAL;
3791 if (decl == NULL_TREE || TREE_CODE (decl) == VOID_TYPE
3792 || decl == error_mark_node)
3793 return error_mark_node;
3795 type = TREE_TYPE (decl);
3797 context = DECL_CONTEXT (decl);
3801 *pushed_scope_p = push_scope (context);
3803 /* We are only interested in class contexts, later. */
3804 if (TREE_CODE (context) == NAMESPACE_DECL)
3805 context = NULL_TREE;
3809 /* Is it valid for this decl to have an initializer at all?
3810 If not, set INITIALIZED to zero, which will indirectly
3811 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
3812 switch (TREE_CODE (decl))
3815 error ("typedef %qD is initialized (use __typeof__ instead)", decl);
3816 return error_mark_node;
3819 error ("function %q#D is initialized like a variable", decl);
3820 return error_mark_node;
3828 if (! toplevel_bindings_p ()
3829 && DECL_EXTERNAL (decl))
3830 warning (0, "declaration of %q#D has %<extern%> and is initialized",
3832 DECL_EXTERNAL (decl) = 0;
3833 if (toplevel_bindings_p ())
3834 TREE_STATIC (decl) = 1;
3837 /* Set attributes here so if duplicate decl, will have proper attributes. */
3838 cplus_decl_attributes (&decl, attributes, 0);
3840 /* Dllimported symbols cannot be defined. Static data members (which
3841 can be initialized in-class and dllimported) go through grokfield,
3842 not here, so we don't need to exclude those decls when checking for
3844 if (initialized && DECL_DLLIMPORT_P (decl))
3846 error ("definition of %q#D is marked %<dllimport%>", decl);
3847 DECL_DLLIMPORT_P (decl) = 0;
3850 /* If #pragma weak was used, mark the decl weak now. */
3851 maybe_apply_pragma_weak (decl);
3853 if (TREE_CODE (decl) == FUNCTION_DECL
3854 && DECL_DECLARED_INLINE_P (decl)
3855 && DECL_UNINLINABLE (decl)
3856 && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl)))
3857 warning (0, "inline function %q+D given attribute noinline", decl);
3859 if (context && COMPLETE_TYPE_P (complete_type (context)))
3861 if (TREE_CODE (decl) == VAR_DECL)
3863 tree field = lookup_field (context, DECL_NAME (decl), 0, false);
3864 if (field == NULL_TREE || TREE_CODE (field) != VAR_DECL)
3865 error ("%q#D is not a static member of %q#T", decl, context);
3868 if (DECL_CONTEXT (field) != context)
3870 if (!same_type_p (DECL_CONTEXT (field), context))
3871 pedwarn ("ISO C++ does not permit %<%T::%D%> "
3872 "to be defined as %<%T::%D%>",
3873 DECL_CONTEXT (field), DECL_NAME (decl),
3874 context, DECL_NAME (decl));
3875 DECL_CONTEXT (decl) = DECL_CONTEXT (field);
3877 if (processing_specialization
3878 && template_class_depth (context) == 0
3879 && CLASSTYPE_TEMPLATE_SPECIALIZATION (context))
3880 error ("template header not allowed in member definition "
3881 "of explicitly specialized class");
3882 /* Static data member are tricky; an in-class initialization
3883 still doesn't provide a definition, so the in-class
3884 declaration will have DECL_EXTERNAL set, but will have an
3885 initialization. Thus, duplicate_decls won't warn
3886 about this situation, and so we check here. */
3887 if (initialized && DECL_INITIALIZED_IN_CLASS_P (field))
3888 error ("duplicate initialization of %qD", decl);
3889 if (duplicate_decls (decl, field, /*newdecl_is_friend=*/false))
3895 tree field = check_classfn (context, decl,
3896 (processing_template_decl
3897 > template_class_depth (context))
3898 ? current_template_parms
3900 if (field && duplicate_decls (decl, field,
3901 /*newdecl_is_friend=*/false))
3905 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
3906 DECL_IN_AGGR_P (decl) = 0;
3907 /* Do not mark DECL as an explicit specialization if it was not
3908 already marked as an instantiation; a declaration should
3909 never be marked as a specialization unless we know what
3910 template is being specialized. */
3911 if (DECL_LANG_SPECIFIC (decl) && DECL_USE_TEMPLATE (decl))
3913 SET_DECL_TEMPLATE_SPECIALIZATION (decl);
3915 /* [temp.expl.spec] An explicit specialization of a static data
3916 member of a template is a definition if the declaration
3917 includes an initializer; otherwise, it is a declaration.
3919 We check for processing_specialization so this only applies
3920 to the new specialization syntax. */
3921 if (!initialized && processing_specialization)
3922 DECL_EXTERNAL (decl) = 1;
3925 if (DECL_EXTERNAL (decl) && ! DECL_TEMPLATE_SPECIALIZATION (decl))
3926 pedwarn ("declaration of %q#D outside of class is not definition",
3930 /* Enter this declaration into the symbol table. */
3931 tem = maybe_push_decl (decl);
3933 if (processing_template_decl)
3934 tem = push_template_decl (tem);
3935 if (tem == error_mark_node)
3936 return error_mark_node;
3938 /* Tell the back-end to use or not use .common as appropriate. If we say
3939 -fconserve-space, we want this to save .data space, at the expense of
3940 wrong semantics. If we say -fno-conserve-space, we want this to
3941 produce errors about redefs; to do this we force variables into the
3943 if (flag_conserve_space
3944 && TREE_CODE (tem) == VAR_DECL
3945 && TREE_PUBLIC (tem)
3946 && !DECL_THREAD_LOCAL_P (tem)
3947 && !have_global_bss_p ())
3948 DECL_COMMON (tem) = 1;
3950 if (!processing_template_decl && TREE_CODE (tem) == VAR_DECL)
3951 start_decl_1 (tem, initialized);
3957 start_decl_1 (tree decl, bool initialized)
3961 gcc_assert (!processing_template_decl);
3963 if (error_operand_p (decl))
3966 gcc_assert (TREE_CODE (decl) == VAR_DECL);
3967 type = TREE_TYPE (decl);
3970 /* Is it valid for this decl to have an initializer at all?
3971 If not, set INITIALIZED to zero, which will indirectly
3972 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
3974 /* Don't allow initializations for incomplete types except for
3975 arrays which might be completed by the initialization. */
3976 if (COMPLETE_TYPE_P (complete_type (type)))
3977 ; /* A complete type is ok. */
3978 else if (TREE_CODE (type) != ARRAY_TYPE)
3980 error ("variable %q#D has initializer but incomplete type", decl);
3982 type = TREE_TYPE (decl) = error_mark_node;
3984 else if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (type))))
3986 if (DECL_LANG_SPECIFIC (decl) && DECL_TEMPLATE_INFO (decl))
3987 error ("elements of array %q#D have incomplete type", decl);
3988 /* else we already gave an error in start_decl. */
3992 else if (IS_AGGR_TYPE (type)
3993 && ! DECL_EXTERNAL (decl))
3995 if (!COMPLETE_TYPE_P (complete_type (type)))
3997 error ("aggregate %q#D has incomplete type and cannot be defined",
3999 /* Change the type so that assemble_variable will give
4000 DECL an rtl we can live with: (mem (const_int 0)). */
4001 type = TREE_TYPE (decl) = error_mark_node;
4005 /* If any base type in the hierarchy of TYPE needs a constructor,
4006 then we set initialized to 1. This way any nodes which are
4007 created for the purposes of initializing this aggregate
4008 will live as long as it does. This is necessary for global
4009 aggregates which do not have their initializers processed until
4010 the end of the file. */
4011 initialized = TYPE_NEEDS_CONSTRUCTING (type);
4015 /* Create a new scope to hold this declaration if necessary.
4016 Whether or not a new scope is necessary cannot be determined
4017 until after the type has been completed; if the type is a
4018 specialization of a class template it is not until after
4019 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
4020 will be set correctly. */
4021 maybe_push_cleanup_level (type);
4024 /* Handle initialization of references. DECL, TYPE, and INIT have the
4025 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
4026 but will be set to a new CLEANUP_STMT if a temporary is created
4027 that must be destroyed subsequently.
4029 Returns an initializer expression to use to initialize DECL, or
4030 NULL if the initialization can be performed statically.
4032 Quotes on semantics can be found in ARM 8.4.3. */
4035 grok_reference_init (tree decl, tree type, tree init, tree *cleanup)
4039 if (init == NULL_TREE)
4041 if ((DECL_LANG_SPECIFIC (decl) == 0
4042 || DECL_IN_AGGR_P (decl) == 0)
4043 && ! DECL_THIS_EXTERN (decl))
4044 error ("%qD declared as reference but not initialized", decl);
4048 if (TREE_CODE (init) == CONSTRUCTOR)
4050 error ("ISO C++ forbids use of initializer list to "
4051 "initialize reference %qD", decl);
4055 if (TREE_CODE (init) == TREE_LIST)
4056 init = build_x_compound_expr_from_list (init, "initializer");
4058 if (TREE_CODE (TREE_TYPE (type)) != ARRAY_TYPE
4059 && TREE_CODE (TREE_TYPE (init)) == ARRAY_TYPE)
4060 /* Note: default conversion is only called in very special cases. */
4061 init = decay_conversion (init);
4063 /* Convert INIT to the reference type TYPE. This may involve the
4064 creation of a temporary, whose lifetime must be the same as that
4065 of the reference. If so, a DECL_EXPR for the temporary will be
4066 added just after the DECL_EXPR for DECL. That's why we don't set
4067 DECL_INITIAL for local references (instead assigning to them
4068 explicitly); we need to allow the temporary to be initialized
4070 tmp = initialize_reference (type, init, decl, cleanup);
4072 if (tmp == error_mark_node)
4074 else if (tmp == NULL_TREE)
4076 error ("cannot initialize %qT from %qT", type, TREE_TYPE (init));
4080 if (TREE_STATIC (decl) && !TREE_CONSTANT (tmp))
4083 DECL_INITIAL (decl) = tmp;
4088 /* When parsing `int a[] = {1, 2};' we don't know the size of the
4089 array until we finish parsing the initializer. If that's the
4090 situation we're in, update DECL accordingly. */
4093 maybe_deduce_size_from_array_init (tree decl, tree init)
4095 tree type = TREE_TYPE (decl);
4097 if (TREE_CODE (type) == ARRAY_TYPE
4098 && TYPE_DOMAIN (type) == NULL_TREE
4099 && TREE_CODE (decl) != TYPE_DECL)
4101 /* do_default is really a C-ism to deal with tentative definitions.
4102 But let's leave it here to ease the eventual merge. */
4103 int do_default = !DECL_EXTERNAL (decl);
4104 tree initializer = init ? init : DECL_INITIAL (decl);
4105 int failure = cp_complete_array_type (&TREE_TYPE (decl), initializer,
4110 error ("initializer fails to determine size of %qD", decl);
4111 TREE_TYPE (decl) = error_mark_node;
4113 else if (failure == 2)
4117 error ("array size missing in %qD", decl);
4118 TREE_TYPE (decl) = error_mark_node;
4120 /* If a `static' var's size isn't known, make it extern as
4121 well as static, so it does not get allocated. If it's not
4122 `static', then don't mark it extern; finish_incomplete_decl
4123 will give it a default size and it will get allocated. */
4124 else if (!pedantic && TREE_STATIC (decl) && !TREE_PUBLIC (decl))
4125 DECL_EXTERNAL (decl) = 1;
4127 else if (failure == 3)
4129 error ("zero-size array %qD", decl);
4130 TREE_TYPE (decl) = error_mark_node;
4133 cp_apply_type_quals_to_decl (cp_type_quals (TREE_TYPE (decl)), decl);
4135 layout_decl (decl, 0);
4139 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
4140 any appropriate error messages regarding the layout. */
4143 layout_var_decl (tree decl)
4147 type = TREE_TYPE (decl);
4148 if (type == error_mark_node)
4151 /* If we haven't already layed out this declaration, do so now.
4152 Note that we must not call complete type for an external object
4153 because it's type might involve templates that we are not
4154 supposed to instantiate yet. (And it's perfectly valid to say
4155 `extern X x' for some incomplete type `X'.) */
4156 if (!DECL_EXTERNAL (decl))
4157 complete_type (type);
4158 if (!DECL_SIZE (decl)
4159 && TREE_TYPE (decl) != error_mark_node
4160 && (COMPLETE_TYPE_P (type)
4161 || (TREE_CODE (type) == ARRAY_TYPE
4162 && !TYPE_DOMAIN (type)
4163 && COMPLETE_TYPE_P (TREE_TYPE (type)))))
4164 layout_decl (decl, 0);
4166 if (!DECL_EXTERNAL (decl) && DECL_SIZE (decl) == NULL_TREE)
4168 /* An automatic variable with an incomplete type: that is an error.
4169 Don't talk about array types here, since we took care of that
4170 message in grokdeclarator. */
4171 error ("storage size of %qD isn't known", decl);
4172 TREE_TYPE (decl) = error_mark_node;
4175 /* Keep this code around in case we later want to control debug info
4176 based on whether a type is "used". (jason 1999-11-11) */
4178 else if (!DECL_EXTERNAL (decl) && IS_AGGR_TYPE (ttype))
4179 /* Let debugger know it should output info for this type. */
4180 note_debug_info_needed (ttype);
4182 if (TREE_STATIC (decl) && DECL_CLASS_SCOPE_P (decl))
4183 note_debug_info_needed (DECL_CONTEXT (decl));
4186 if ((DECL_EXTERNAL (decl) || TREE_STATIC (decl))
4187 && DECL_SIZE (decl) != NULL_TREE
4188 && ! TREE_CONSTANT (DECL_SIZE (decl)))
4190 if (TREE_CODE (DECL_SIZE (decl)) == INTEGER_CST)
4191 constant_expression_warning (DECL_SIZE (decl));
4193 error ("storage size of %qD isn't constant", decl);
4197 /* If a local static variable is declared in an inline function, or if
4198 we have a weak definition, we must endeavor to create only one
4199 instance of the variable at link-time. */
4202 maybe_commonize_var (tree decl)
4204 /* Static data in a function with comdat linkage also has comdat
4206 if (TREE_STATIC (decl)
4207 /* Don't mess with __FUNCTION__. */
4208 && ! DECL_ARTIFICIAL (decl)
4209 && DECL_FUNCTION_SCOPE_P (decl)
4210 /* Unfortunately, import_export_decl has not always been called
4211 before the function is processed, so we cannot simply check
4213 && (DECL_COMDAT (DECL_CONTEXT (decl))
4214 || ((DECL_DECLARED_INLINE_P (DECL_CONTEXT (decl))
4215 || DECL_TEMPLATE_INSTANTIATION (DECL_CONTEXT (decl)))
4216 && TREE_PUBLIC (DECL_CONTEXT (decl)))))
4220 /* With weak symbols, we simply make the variable COMDAT;
4221 that will cause copies in multiple translations units to
4223 comdat_linkage (decl);
4227 if (DECL_INITIAL (decl) == NULL_TREE
4228 || DECL_INITIAL (decl) == error_mark_node)
4230 /* Without weak symbols, we can use COMMON to merge
4231 uninitialized variables. */
4232 TREE_PUBLIC (decl) = 1;
4233 DECL_COMMON (decl) = 1;
4237 /* While for initialized variables, we must use internal
4238 linkage -- which means that multiple copies will not
4240 TREE_PUBLIC (decl) = 0;
4241 DECL_COMMON (decl) = 0;
4242 warning (0, "sorry: semantics of inline function static "
4243 "data %q+#D are wrong (you'll wind up "
4244 "with multiple copies)", decl);
4245 warning (0, "%J you can work around this by removing "
4251 else if (DECL_LANG_SPECIFIC (decl) && DECL_COMDAT (decl))
4252 /* Set it up again; we might have set DECL_INITIAL since the last
4254 comdat_linkage (decl);
4257 /* Issue an error message if DECL is an uninitialized const variable. */
4260 check_for_uninitialized_const_var (tree decl)
4262 tree type = TREE_TYPE (decl);
4264 /* ``Unless explicitly declared extern, a const object does not have
4265 external linkage and must be initialized. ($8.4; $12.1)'' ARM
4267 if (TREE_CODE (decl) == VAR_DECL
4268 && TREE_CODE (type) != REFERENCE_TYPE
4269 && CP_TYPE_CONST_P (type)
4270 && !TYPE_NEEDS_CONSTRUCTING (type)
4271 && !DECL_INITIAL (decl))
4272 error ("uninitialized const %qD", decl);
4276 /* Structure holding the current initializer being processed by reshape_init.
4277 CUR is a pointer to the current element being processed, END is a pointer
4278 after the last element present in the initializer. */
4279 typedef struct reshape_iterator_t
4281 constructor_elt *cur;
4282 constructor_elt *end;
4285 static tree reshape_init_r (tree, reshape_iter *, bool);
4287 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
4288 returned is the next FIELD_DECL (possibly FIELD itself) that can be
4289 initialized. If there are no more such fields, the return value
4293 next_initializable_field (tree field)
4296 && (TREE_CODE (field) != FIELD_DECL
4297 || (DECL_C_BIT_FIELD (field) && !DECL_NAME (field))
4298 || DECL_ARTIFICIAL (field)))
4299 field = TREE_CHAIN (field);
4304 /* Subroutine of reshape_init_array and reshape_init_vector, which does
4305 the actual work. ELT_TYPE is the element type of the array. MAX_INDEX is an
4306 INTEGER_CST representing the size of the array minus one (the maximum index),
4307 or NULL_TREE if the array was declared without specifying the size. D is
4308 the iterator within the constructor. */
4311 reshape_init_array_1 (tree elt_type, tree max_index, reshape_iter *d)
4314 bool sized_array_p = (max_index != NULL_TREE);
4315 unsigned HOST_WIDE_INT max_index_cst = 0;
4316 unsigned HOST_WIDE_INT index;
4318 /* The initializer for an array is always a CONSTRUCTOR. */
4319 new_init = build_constructor (NULL_TREE, NULL);
4323 /* Minus 1 is used for zero sized arrays. */
4324 if (integer_all_onesp (max_index))
4327 if (host_integerp (max_index, 1))
4328 max_index_cst = tree_low_cst (max_index, 1);
4329 /* sizetype is sign extended, not zero extended. */
4331 max_index_cst = tree_low_cst (fold_convert (size_type_node, max_index),
4335 /* Loop until there are no more initializers. */
4337 d->cur != d->end && (!sized_array_p || index <= max_index_cst);
4344 /* Handle array designated initializers (GNU extension). */
4345 if (TREE_CODE (d->cur->index) == IDENTIFIER_NODE)
4347 error ("name %qD used in a GNU-style designated "
4348 "initializer for an array", d->cur->index);
4354 elt_init = reshape_init_r (elt_type, d, /*first_initializer_p=*/false);
4355 if (elt_init == error_mark_node)
4356 return error_mark_node;
4357 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init), NULL_TREE, elt_init);
4363 /* Subroutine of reshape_init_r, processes the initializers for arrays.
4364 Parameters are the same of reshape_init_r. */
4367 reshape_init_array (tree type, reshape_iter *d)
4369 tree max_index = NULL_TREE;
4371 gcc_assert (TREE_CODE (type) == ARRAY_TYPE);
4373 if (TYPE_DOMAIN (type))
4374 max_index = array_type_nelts (type);
4376 return reshape_init_array_1 (TREE_TYPE (type), max_index, d);
4379 /* Subroutine of reshape_init_r, processes the initializers for vectors.
4380 Parameters are the same of reshape_init_r. */
4383 reshape_init_vector (tree type, reshape_iter *d)
4385 tree max_index = NULL_TREE;
4388 gcc_assert (TREE_CODE (type) == VECTOR_TYPE);
4390 if (COMPOUND_LITERAL_P (d->cur->value))
4392 tree value = d->cur->value;
4393 if (!same_type_p (TREE_TYPE (value), type))
4395 error ("invalid type %qT as initializer for a vector of type %qT",
4396 TREE_TYPE (d->cur->value), type);
4397 value = error_mark_node;
4403 /* For a vector, the representation type is a struct
4404 containing a single member which is an array of the
4405 appropriate size. */
4406 rtype = TYPE_DEBUG_REPRESENTATION_TYPE (type);
4407 if (rtype && TYPE_DOMAIN (TREE_TYPE (TYPE_FIELDS (rtype))))
4408 max_index = array_type_nelts (TREE_TYPE (TYPE_FIELDS (rtype)));
4410 return reshape_init_array_1 (TREE_TYPE (type), max_index, d);
4413 /* Subroutine of reshape_init_r, processes the initializers for classes
4414 or union. Parameters are the same of reshape_init_r. */
4417 reshape_init_class (tree type, reshape_iter *d, bool first_initializer_p)
4422 gcc_assert (CLASS_TYPE_P (type));
4424 /* The initializer for a class is always a CONSTRUCTOR. */
4425 new_init = build_constructor (NULL_TREE, NULL);
4426 field = next_initializable_field (TYPE_FIELDS (type));
4432 An initializer for an aggregate member that is an
4433 empty class shall have the form of an empty
4434 initializer-list {}. */
4435 if (!first_initializer_p)
4437 error ("initializer for %qT must be brace-enclosed", type);
4438 return error_mark_node;
4443 /* Loop through the initializable fields, gathering initializers. */
4444 while (d->cur != d->end)
4448 /* Handle designated initializers, as an extension. */
4451 field = lookup_field_1 (type, d->cur->index, /*want_type=*/false);
4453 if (!field || TREE_CODE (field) != FIELD_DECL)
4455 error ("%qT has no non-static data member named %qD", type,
4457 return error_mark_node;
4461 /* If we processed all the member of the class, we are done. */
4465 field_init = reshape_init_r (TREE_TYPE (field), d,
4466 /*first_initializer_p=*/false);
4467 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init), field, field_init);
4471 When a union is initialized with a brace-enclosed
4472 initializer, the braces shall only contain an
4473 initializer for the first member of the union. */
4474 if (TREE_CODE (type) == UNION_TYPE)
4477 field = next_initializable_field (TREE_CHAIN (field));
4483 /* Subroutine of reshape_init, which processes a single initializer (part of
4484 a CONSTRUCTOR). TYPE is the type of the variable being initialized, D is the
4485 iterator within the CONSTRUCTOR which points to the initializer to process.
4486 FIRST_INITIALIZER_P is true if this is the first initializer of the
4487 CONSTRUCTOR node. */
4490 reshape_init_r (tree type, reshape_iter *d, bool first_initializer_p)
4492 tree init = d->cur->value;
4494 /* A non-aggregate type is always initialized with a single
4496 if (!CP_AGGREGATE_TYPE_P (type))
4498 /* It is invalid to initialize a non-aggregate type with a
4499 brace-enclosed initializer.
4500 We need to check for BRACE_ENCLOSED_INITIALIZER_P here because
4501 of g++.old-deja/g++.mike/p7626.C: a pointer-to-member constant is
4502 a CONSTRUCTOR (with a record type). */
4503 if (TREE_CODE (init) == CONSTRUCTOR
4504 && BRACE_ENCLOSED_INITIALIZER_P (init)) /* p7626.C */
4506 error ("braces around scalar initializer for type %qT", type);
4507 init = error_mark_node;
4516 All implicit type conversions (clause _conv_) are considered when
4517 initializing the aggregate member with an initializer from an
4518 initializer-list. If the initializer can initialize a member,
4519 the member is initialized. Otherwise, if the member is itself a
4520 non-empty subaggregate, brace elision is assumed and the
4521 initializer is considered for the initialization of the first
4522 member of the subaggregate. */
4523 if (TREE_CODE (init) != CONSTRUCTOR
4524 && can_convert_arg (type, TREE_TYPE (init), init, LOOKUP_NORMAL))
4530 /* [dcl.init.string]
4532 A char array (whether plain char, signed char, or unsigned char)
4533 can be initialized by a string-literal (optionally enclosed in
4534 braces); a wchar_t array can be initialized by a wide
4535 string-literal (optionally enclosed in braces). */
4536 if (TREE_CODE (type) == ARRAY_TYPE
4537 && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type))))
4539 tree str_init = init;
4541 /* Strip one level of braces if and only if they enclose a single
4542 element (as allowed by [dcl.init.string]). */
4543 if (!first_initializer_p
4544 && TREE_CODE (str_init) == CONSTRUCTOR
4545 && VEC_length (constructor_elt, CONSTRUCTOR_ELTS (str_init)) == 1)
4547 str_init = VEC_index (constructor_elt,
4548 CONSTRUCTOR_ELTS (str_init), 0)->value;
4551 /* If it's a string literal, then it's the initializer for the array
4552 as a whole. Otherwise, continue with normal initialization for
4553 array types (one value per array element). */
4554 if (TREE_CODE (str_init) == STRING_CST)
4561 /* The following cases are about aggregates. If we are not within a full
4562 initializer already, and there is not a CONSTRUCTOR, it means that there
4563 is a missing set of braces (that is, we are processing the case for
4564 which reshape_init exists). */
4565 if (!first_initializer_p)
4567 if (TREE_CODE (init) == CONSTRUCTOR)
4569 /* For a nested compound literal, there is no need to reshape since
4570 brace elision is not allowed. Even if we decided to allow it,
4571 we should add a call to reshape_init in finish_compound_literal,
4572 before calling digest_init, so changing this code would still
4573 not be necessary. */
4574 if (!COMPOUND_LITERAL_P (init))
4577 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init));
4578 return reshape_init (type, init);
4581 gcc_assert (!BRACE_ENCLOSED_INITIALIZER_P (init));
4584 warning (OPT_Wmissing_braces, "missing braces around initializer for %qT",
4588 /* Dispatch to specialized routines. */
4589 if (CLASS_TYPE_P (type))
4590 return reshape_init_class (type, d, first_initializer_p);
4591 else if (TREE_CODE (type) == ARRAY_TYPE)
4592 return reshape_init_array (type, d);
4593 else if (TREE_CODE (type) == VECTOR_TYPE)
4594 return reshape_init_vector (type, d);
4599 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
4600 brace-enclosed aggregate initializer.
4602 INIT is the CONSTRUCTOR containing the list of initializers describing
4603 a brace-enclosed initializer for an entity of the indicated aggregate TYPE.
4604 It may not presently match the shape of the TYPE; for example:
4606 struct S { int a; int b; };
4607 struct S a[] = { 1, 2, 3, 4 };
4609 Here INIT will hold a VEC of four elements, rather than a
4610 VEC of two elements, each itself a VEC of two elements. This
4611 routine transforms INIT from the former form into the latter. The
4612 revised CONSTRUCTOR node is returned. */
4615 reshape_init (tree type, tree init)
4617 VEC(constructor_elt, gc) *v;
4621 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init));
4623 v = CONSTRUCTOR_ELTS (init);
4625 /* An empty constructor does not need reshaping, and it is always a valid
4627 if (VEC_empty (constructor_elt, v))
4630 /* Recurse on this CONSTRUCTOR. */
4631 d.cur = VEC_index (constructor_elt, v, 0);
4632 d.end = d.cur + VEC_length (constructor_elt, v);
4634 new_init = reshape_init_r (type, &d, true);
4635 if (new_init == error_mark_node)
4636 return error_mark_node;
4638 /* Make sure all the element of the constructor were used. Otherwise,
4639 issue an error about exceeding initializers. */
4641 error ("too many initializers for %qT", type);
4646 /* Verify INIT (the initializer for DECL), and record the
4647 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
4648 grok_reference_init.
4650 If the return value is non-NULL, it is an expression that must be
4651 evaluated dynamically to initialize DECL. */
4654 check_initializer (tree decl, tree init, int flags, tree *cleanup)
4656 tree type = TREE_TYPE (decl);
4657 tree init_code = NULL;
4659 /* Things that are going to be initialized need to have complete
4661 TREE_TYPE (decl) = type = complete_type (TREE_TYPE (decl));
4663 if (type == error_mark_node)
4664 /* We will have already complained. */
4667 if (TREE_CODE (type) == ARRAY_TYPE)
4669 tree element_type = TREE_TYPE (type);
4671 /* The array type itself need not be complete, because the
4672 initializer may tell us how many elements are in the array.
4673 But, the elements of the array must be complete. */
4674 if (!COMPLETE_TYPE_P (complete_type (element_type)))
4676 error ("elements of array %q#D have incomplete type", decl);
4679 /* It is not valid to initialize an a VLA. */
4681 && ((COMPLETE_TYPE_P (type) && !TREE_CONSTANT (TYPE_SIZE (type)))
4682 || !TREE_CONSTANT (TYPE_SIZE (element_type))))
4684 error ("variable-sized object %qD may not be initialized", decl);
4688 else if (!COMPLETE_TYPE_P (type))
4690 error ("%qD has incomplete type", decl);
4691 TREE_TYPE (decl) = error_mark_node;
4695 /* There is no way to make a variable-sized class type in GNU C++. */
4696 gcc_assert (TREE_CONSTANT (TYPE_SIZE (type)));
4698 if (!CP_AGGREGATE_TYPE_P (type)
4699 && init && BRACE_ENCLOSED_INITIALIZER_P (init)
4700 && VEC_length (constructor_elt, CONSTRUCTOR_ELTS (init)) != 1)
4702 error ("scalar object %qD requires one element in initializer", decl);
4703 TREE_TYPE (decl) = error_mark_node;
4707 if (TREE_CODE (decl) == CONST_DECL)
4709 gcc_assert (TREE_CODE (type) != REFERENCE_TYPE);
4711 DECL_INITIAL (decl) = init;
4713 gcc_assert (init != NULL_TREE);
4716 else if (!DECL_EXTERNAL (decl) && TREE_CODE (type) == REFERENCE_TYPE)
4717 init = grok_reference_init (decl, type, init, cleanup);
4720 /* Do not reshape constructors of vectors (they don't need to be
4722 if (TREE_CODE (init) == CONSTRUCTOR
4723 && !COMPOUND_LITERAL_P (init)
4724 && !TREE_TYPE (init)) /* ptrmemfunc */
4726 init = reshape_init (type, init);
4728 if ((*targetm.vector_opaque_p) (type))
4730 error ("opaque vector types cannot be initialized");
4731 init = error_mark_node;
4735 /* If DECL has an array type without a specific bound, deduce the
4736 array size from the initializer. */
4737 maybe_deduce_size_from_array_init (decl, init);
4738 type = TREE_TYPE (decl);
4739 if (type == error_mark_node)
4742 if (TYPE_HAS_CONSTRUCTOR (type) || TYPE_NEEDS_CONSTRUCTING (type))
4744 if (TREE_CODE (type) == ARRAY_TYPE)
4745 goto initialize_aggr;
4746 else if (TREE_CODE (init) == CONSTRUCTOR)
4748 if (TYPE_NON_AGGREGATE_CLASS (type))
4750 error ("%qD must be initialized by constructor, "
4753 init = error_mark_node;
4756 goto dont_use_constructor;
4760 int saved_stmts_are_full_exprs_p;
4763 saved_stmts_are_full_exprs_p = 0;
4764 if (building_stmt_tree ())
4766 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
4767 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
4769 init = build_aggr_init (decl, init, flags);
4770 if (building_stmt_tree ())
4771 current_stmt_tree ()->stmts_are_full_exprs_p =
4772 saved_stmts_are_full_exprs_p;
4778 dont_use_constructor:
4779 if (TREE_CODE (init) != TREE_VEC)
4781 init_code = store_init_value (decl, init);
4782 if (pedantic && TREE_CODE (type) == ARRAY_TYPE
4783 && DECL_INITIAL (decl)
4784 && TREE_CODE (DECL_INITIAL (decl)) == STRING_CST
4785 && PAREN_STRING_LITERAL_P (DECL_INITIAL (decl)))
4786 warning (0, "array %qD initialized by parenthesized string literal %qE",
4787 decl, DECL_INITIAL (decl));
4792 else if (DECL_EXTERNAL (decl))
4794 else if (TYPE_P (type) && TYPE_NEEDS_CONSTRUCTING (type))
4795 goto initialize_aggr;
4796 else if (IS_AGGR_TYPE (type))
4798 tree core_type = strip_array_types (type);
4800 if (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type))
4801 error ("structure %qD with uninitialized const members", decl);
4802 if (CLASSTYPE_REF_FIELDS_NEED_INIT (core_type))
4803 error ("structure %qD with uninitialized reference members", decl);
4805 check_for_uninitialized_const_var (decl);
4808 check_for_uninitialized_const_var (decl);
4810 if (init && init != error_mark_node)
4811 init_code = build2 (INIT_EXPR, type, decl, init);
4816 /* If DECL is not a local variable, give it RTL. */
4819 make_rtl_for_nonlocal_decl (tree decl, tree init, const char* asmspec)
4821 int toplev = toplevel_bindings_p ();
4823 const char *filename;
4825 /* Set the DECL_ASSEMBLER_NAME for the object. */
4828 /* The `register' keyword, when used together with an
4829 asm-specification, indicates that the variable should be
4830 placed in a particular register. */
4831 if (TREE_CODE (decl) == VAR_DECL && DECL_REGISTER (decl))
4833 set_user_assembler_name (decl, asmspec);
4834 DECL_HARD_REGISTER (decl) = 1;
4838 if (TREE_CODE (decl) == FUNCTION_DECL
4839 && DECL_BUILT_IN_CLASS (decl) == BUILT_IN_NORMAL)
4840 set_builtin_user_assembler_name (decl, asmspec);
4841 set_user_assembler_name (decl, asmspec);
4845 /* Handle non-variables up front. */
4846 if (TREE_CODE (decl) != VAR_DECL)
4848 rest_of_decl_compilation (decl, toplev, at_eof);
4852 /* If we see a class member here, it should be a static data
4854 if (DECL_LANG_SPECIFIC (decl) && DECL_IN_AGGR_P (decl))
4856 gcc_assert (TREE_STATIC (decl));
4857 /* An in-class declaration of a static data member should be
4858 external; it is only a declaration, and not a definition. */
4859 if (init == NULL_TREE)
4860 gcc_assert (DECL_EXTERNAL (decl));
4863 /* We don't create any RTL for local variables. */
4864 if (DECL_FUNCTION_SCOPE_P (decl) && !TREE_STATIC (decl))
4867 /* We defer emission of local statics until the corresponding
4868 DECL_EXPR is expanded. */
4869 defer_p = DECL_FUNCTION_SCOPE_P (decl) || DECL_VIRTUAL_P (decl);
4871 /* We try to defer namespace-scope static constants so that they are
4872 not emitted into the object file unnecessarily. */
4873 filename = input_filename;
4874 if (!DECL_VIRTUAL_P (decl)
4875 && TREE_READONLY (decl)
4876 && DECL_INITIAL (decl) != NULL_TREE
4877 && DECL_INITIAL (decl) != error_mark_node
4879 && ! EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl))
4881 && !TREE_PUBLIC (decl))
4883 /* Fool with the linkage of static consts according to #pragma
4885 struct c_fileinfo *finfo = get_fileinfo (filename);
4886 if (!finfo->interface_unknown && !TREE_PUBLIC (decl))
4888 TREE_PUBLIC (decl) = 1;
4889 DECL_EXTERNAL (decl) = finfo->interface_only;
4894 /* Likewise for template instantiations. */
4895 else if (DECL_LANG_SPECIFIC (decl)
4896 && DECL_IMPLICIT_INSTANTIATION (decl))
4899 /* If we're not deferring, go ahead and assemble the variable. */
4901 rest_of_decl_compilation (decl, toplev, at_eof);
4904 /* Generate code to initialize DECL (a local variable). */
4907 initialize_local_var (tree decl, tree init)
4909 tree type = TREE_TYPE (decl);
4912 gcc_assert (TREE_CODE (decl) == VAR_DECL
4913 || TREE_CODE (decl) == RESULT_DECL);
4914 gcc_assert (!TREE_STATIC (decl));
4916 if (DECL_SIZE (decl) == NULL_TREE)
4918 /* If we used it already as memory, it must stay in memory. */
4919 DECL_INITIAL (decl) = NULL_TREE;
4920 TREE_ADDRESSABLE (decl) = TREE_USED (decl);
4923 if (DECL_SIZE (decl) && type != error_mark_node)
4927 /* Compute and store the initial value. */
4928 already_used = TREE_USED (decl) || TREE_USED (type);
4930 /* Perform the initialization. */
4933 int saved_stmts_are_full_exprs_p;
4935 gcc_assert (building_stmt_tree ());
4936 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
4937 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
4938 finish_expr_stmt (init);
4939 current_stmt_tree ()->stmts_are_full_exprs_p =
4940 saved_stmts_are_full_exprs_p;
4943 /* Set this to 0 so we can tell whether an aggregate which was
4944 initialized was ever used. Don't do this if it has a
4945 destructor, so we don't complain about the 'resource
4946 allocation is initialization' idiom. Now set
4947 attribute((unused)) on types so decls of that type will be
4948 marked used. (see TREE_USED, above.) */
4949 if (TYPE_NEEDS_CONSTRUCTING (type)
4951 && TYPE_HAS_TRIVIAL_DESTRUCTOR (type)
4952 && DECL_NAME (decl))
4953 TREE_USED (decl) = 0;
4954 else if (already_used)
4955 TREE_USED (decl) = 1;
4958 /* Generate a cleanup, if necessary. */
4959 cleanup = cxx_maybe_build_cleanup (decl);
4960 if (DECL_SIZE (decl) && cleanup)
4961 finish_decl_cleanup (decl, cleanup);
4964 /* DECL is a VAR_DECL for a compiler-generated variable with static
4965 storage duration (like a virtual table) whose initializer is a
4966 compile-time constant. INIT must be either a TREE_LIST of values,
4967 or a CONSTRUCTOR. Initialize the variable and provide it to the
4971 initialize_artificial_var (tree decl, tree init)
4973 gcc_assert (DECL_ARTIFICIAL (decl));
4974 if (TREE_CODE (init) == TREE_LIST)
4975 init = build_constructor_from_list (NULL_TREE, init);
4976 gcc_assert (TREE_CODE (init) == CONSTRUCTOR);
4977 DECL_INITIAL (decl) = init;
4978 DECL_INITIALIZED_P (decl) = 1;
4979 determine_visibility (decl);
4980 layout_var_decl (decl);
4981 maybe_commonize_var (decl);
4982 make_rtl_for_nonlocal_decl (decl, init, /*asmspec=*/NULL);
4985 /* Finish processing of a declaration;
4986 install its line number and initial value.
4987 If the length of an array type is not known before,
4988 it must be determined now, from the initial value, or it is an error.
4990 INIT is the initializer (if any) for DECL. If INIT_CONST_EXPR_P is
4991 true, then INIT is an integral constant expression.
4993 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
4994 if the (init) syntax was used. */
4997 cp_finish_decl (tree decl, tree init, bool init_const_expr_p,
4998 tree asmspec_tree, int flags)
5002 const char *asmspec = NULL;
5003 int was_readonly = 0;
5004 bool var_definition_p = false;
5005 int saved_processing_template_decl;
5007 if (decl == error_mark_node)
5012 error ("assignment (not initialization) in declaration");
5016 gcc_assert (TREE_CODE (decl) != RESULT_DECL);
5017 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
5018 gcc_assert (TREE_CODE (decl) != PARM_DECL);
5020 type = TREE_TYPE (decl);
5021 if (type == error_mark_node)
5024 /* Assume no cleanup is required. */
5025 cleanup = NULL_TREE;
5026 saved_processing_template_decl = processing_template_decl;
5028 /* If a name was specified, get the string. */
5029 if (global_scope_p (current_binding_level))
5030 asmspec_tree = maybe_apply_renaming_pragma (decl, asmspec_tree);
5031 if (asmspec_tree && asmspec_tree != error_mark_node)
5032 asmspec = TREE_STRING_POINTER (asmspec_tree);
5034 if (current_class_type
5035 && CP_DECL_CONTEXT (decl) == current_class_type
5036 && TYPE_BEING_DEFINED (current_class_type)
5037 && (DECL_INITIAL (decl) || init))
5038 DECL_INITIALIZED_IN_CLASS_P (decl) = 1;
5040 if (processing_template_decl)
5042 bool type_dependent_p;
5044 /* Add this declaration to the statement-tree. */
5045 if (at_function_scope_p ())
5046 add_decl_expr (decl);
5048 type_dependent_p = dependent_type_p (type);
5050 if (init && init_const_expr_p)
5052 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl) = 1;
5053 if (DECL_INTEGRAL_CONSTANT_VAR_P (decl))
5054 TREE_CONSTANT (decl) = 1;
5058 || !DECL_CLASS_SCOPE_P (decl)
5059 || !DECL_INTEGRAL_CONSTANT_VAR_P (decl)
5061 || value_dependent_expression_p (init))
5064 DECL_INITIAL (decl) = init;
5065 if (TREE_CODE (decl) == VAR_DECL
5066 && !DECL_PRETTY_FUNCTION_P (decl)
5067 && !type_dependent_p)
5068 maybe_deduce_size_from_array_init (decl, init);
5072 init = fold_non_dependent_expr (init);
5073 processing_template_decl = 0;
5076 /* Take care of TYPE_DECLs up front. */
5077 if (TREE_CODE (decl) == TYPE_DECL)
5079 if (type != error_mark_node
5080 && IS_AGGR_TYPE (type) && DECL_NAME (decl))
5082 if (TREE_TYPE (DECL_NAME (decl)) && TREE_TYPE (decl) != type)
5083 warning (0, "shadowing previous type declaration of %q#D", decl);
5084 set_identifier_type_value (DECL_NAME (decl), decl);
5087 /* If we have installed this as the canonical typedef for this
5088 type, and that type has not been defined yet, delay emitting
5089 the debug information for it, as we will emit it later. */
5090 if (TYPE_MAIN_DECL (TREE_TYPE (decl)) == decl
5091 && !COMPLETE_TYPE_P (TREE_TYPE (decl)))
5092 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
5094 rest_of_decl_compilation (decl, DECL_CONTEXT (decl) == NULL_TREE,
5099 /* A reference will be modified here, as it is initialized. */
5100 if (! DECL_EXTERNAL (decl)
5101 && TREE_READONLY (decl)
5102 && TREE_CODE (type) == REFERENCE_TYPE)
5105 TREE_READONLY (decl) = 0;
5108 if (TREE_CODE (decl) == VAR_DECL)
5110 /* Only PODs can have thread-local storage. Other types may require
5111 various kinds of non-trivial initialization. */
5112 if (DECL_THREAD_LOCAL_P (decl) && !pod_type_p (TREE_TYPE (decl)))
5113 error ("%qD cannot be thread-local because it has non-POD type %qT",
5114 decl, TREE_TYPE (decl));
5115 /* If this is a local variable that will need a mangled name,
5116 register it now. We must do this before processing the
5117 initializer for the variable, since the initialization might
5118 require a guard variable, and since the mangled name of the
5119 guard variable will depend on the mangled name of this
5121 if (!processing_template_decl
5122 && DECL_FUNCTION_SCOPE_P (decl)
5123 && TREE_STATIC (decl)
5124 && !DECL_ARTIFICIAL (decl))
5125 push_local_name (decl);
5126 /* Convert the initializer to the type of DECL, if we have not
5127 already initialized DECL. */
5128 if (!DECL_INITIALIZED_P (decl)
5129 /* If !DECL_EXTERNAL then DECL is being defined. In the
5130 case of a static data member initialized inside the
5131 class-specifier, there can be an initializer even if DECL
5132 is *not* defined. */
5133 && (!DECL_EXTERNAL (decl) || init))
5137 DECL_NONTRIVIALLY_INITIALIZED_P (decl) = 1;
5138 if (init_const_expr_p)
5140 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl) = 1;
5141 if (DECL_INTEGRAL_CONSTANT_VAR_P (decl))
5142 TREE_CONSTANT (decl) = 1;
5145 init = check_initializer (decl, init, flags, &cleanup);
5146 /* Thread-local storage cannot be dynamically initialized. */
5147 if (DECL_THREAD_LOCAL_P (decl) && init)
5149 error ("%qD is thread-local and so cannot be dynamically "
5150 "initialized", decl);
5154 /* Check that the initializer for a static data member was a
5155 constant. Although we check in the parser that the
5156 initializer is an integral constant expression, we do not
5157 simplify division-by-zero at the point at which it
5158 occurs. Therefore, in:
5160 struct S { static const int i = 7 / 0; };
5162 we issue an error at this point. It would
5163 probably be better to forbid division by zero in
5164 integral constant expressions. */
5165 if (DECL_EXTERNAL (decl) && init)
5167 error ("%qD cannot be initialized by a non-constant expression"
5168 " when being declared", decl);
5169 DECL_INITIALIZED_IN_CLASS_P (decl) = 0;
5177 The memory occupied by any object of static storage
5178 duration is zero-initialized at program startup before
5179 any other initialization takes place.
5181 We cannot create an appropriate initializer until after
5182 the type of DECL is finalized. If DECL_INITIAL is set,
5183 then the DECL is statically initialized, and any
5184 necessary zero-initialization has already been performed. */
5185 if (TREE_STATIC (decl) && !DECL_INITIAL (decl))
5186 DECL_INITIAL (decl) = build_zero_init (TREE_TYPE (decl),
5187 /*nelts=*/NULL_TREE,
5188 /*static_storage_p=*/true);
5189 /* Remember that the initialization for this variable has
5191 DECL_INITIALIZED_P (decl) = 1;
5192 /* This declaration is the definition of this variable,
5193 unless we are initializing a static data member within
5194 the class specifier. */
5195 if (!DECL_EXTERNAL (decl))
5196 var_definition_p = true;
5198 /* If the variable has an array type, lay out the type, even if
5199 there is no initializer. It is valid to index through the
5200 array, and we must get TYPE_ALIGN set correctly on the array
5202 else if (TREE_CODE (type) == ARRAY_TYPE)
5206 /* Add this declaration to the statement-tree. This needs to happen
5207 after the call to check_initializer so that the DECL_EXPR for a
5208 reference temp is added before the DECL_EXPR for the reference itself. */
5209 if (at_function_scope_p ())
5210 add_decl_expr (decl);
5212 /* Let the middle end know about variables and functions -- but not
5213 static data members in uninstantiated class templates. */
5214 if (!saved_processing_template_decl
5215 && (TREE_CODE (decl) == VAR_DECL
5216 || TREE_CODE (decl) == FUNCTION_DECL))
5218 if (TREE_CODE (decl) == VAR_DECL)
5220 layout_var_decl (decl);
5221 maybe_commonize_var (decl);
5222 if (DECL_NAMESPACE_SCOPE_P (decl) && !TREE_PUBLIC (decl)
5223 && !DECL_THIS_STATIC (decl) && !DECL_ARTIFICIAL (decl))
5225 /* This is a const variable with implicit 'static'. Set
5226 DECL_THIS_STATIC so we can tell it from variables that are
5227 !TREE_PUBLIC because of the anonymous namespace. */
5228 DECL_THIS_STATIC (decl) = 1;
5232 make_rtl_for_nonlocal_decl (decl, init, asmspec);
5234 /* Check for abstractness of the type. Notice that there is no
5235 need to strip array types here since the check for those types
5236 is already done within create_array_type_for_decl. */
5237 if (TREE_CODE (type) == FUNCTION_TYPE
5238 || TREE_CODE (type) == METHOD_TYPE)
5239 abstract_virtuals_error (decl, TREE_TYPE (type));
5241 abstract_virtuals_error (decl, type);
5243 /* This needs to happen after the linkage is set. */
5244 determine_visibility (decl);
5246 if (TREE_CODE (decl) == FUNCTION_DECL
5247 || TREE_TYPE (decl) == error_mark_node)
5248 /* No initialization required. */
5250 else if (DECL_EXTERNAL (decl)
5251 && ! (DECL_LANG_SPECIFIC (decl)
5252 && DECL_NOT_REALLY_EXTERN (decl)))
5255 DECL_INITIAL (decl) = init;
5259 /* A variable definition. */
5260 if (DECL_FUNCTION_SCOPE_P (decl))
5262 /* Initialize the local variable. */
5263 if (processing_template_decl)
5264 DECL_INITIAL (decl) = init;
5265 else if (!TREE_STATIC (decl))
5266 initialize_local_var (decl, init);
5269 /* If a variable is defined, and then a subsequent
5270 definition with external linkage is encountered, we will
5271 get here twice for the same variable. We want to avoid
5272 calling expand_static_init more than once. For variables
5273 that are not static data members, we can call
5274 expand_static_init only when we actually process the
5275 initializer. It is not legal to redeclare a static data
5276 member, so this issue does not arise in that case. */
5277 if (var_definition_p && TREE_STATIC (decl))
5278 expand_static_init (decl, init);
5282 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
5283 reference, insert it in the statement-tree now. */
5285 push_cleanup (decl, cleanup, false);
5288 processing_template_decl = saved_processing_template_decl;
5291 TREE_READONLY (decl) = 1;
5293 /* If this was marked 'used', be sure it will be output. */
5294 if (lookup_attribute ("used", DECL_ATTRIBUTES (decl)))
5295 mark_decl_referenced (decl);
5298 /* This is here for a midend callback from c-common.c. */
5301 finish_decl (tree decl, tree init, tree asmspec_tree)
5303 cp_finish_decl (decl, init, /*init_const_expr_p=*/false, asmspec_tree, 0);
5306 /* Returns a declaration for a VAR_DECL as if:
5308 extern "C" TYPE NAME;
5310 had been seen. Used to create compiler-generated global
5314 declare_global_var (tree name, tree type)
5318 push_to_top_level ();
5319 decl = build_decl (VAR_DECL, name, type);
5320 TREE_PUBLIC (decl) = 1;
5321 DECL_EXTERNAL (decl) = 1;
5322 DECL_ARTIFICIAL (decl) = 1;
5323 /* If the user has explicitly declared this variable (perhaps
5324 because the code we are compiling is part of a low-level runtime
5325 library), then it is possible that our declaration will be merged
5326 with theirs by pushdecl. */
5327 decl = pushdecl (decl);
5328 finish_decl (decl, NULL_TREE, NULL_TREE);
5329 pop_from_top_level ();
5334 /* Returns a pointer to the `atexit' function. Note that if
5335 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
5336 `__cxa_atexit' function specified in the IA64 C++ ABI. */
5339 get_atexit_node (void)
5346 bool use_aeabi_atexit;
5351 if (flag_use_cxa_atexit)
5353 /* The declaration for `__cxa_atexit' is:
5355 int __cxa_atexit (void (*)(void *), void *, void *)
5357 We build up the argument types and then then function type
5360 use_aeabi_atexit = targetm.cxx.use_aeabi_atexit ();
5361 /* First, build the pointer-to-function type for the first
5363 arg_types = tree_cons (NULL_TREE, ptr_type_node, void_list_node);
5364 fn_type = build_function_type (void_type_node, arg_types);
5365 fn_ptr_type = build_pointer_type (fn_type);
5366 /* Then, build the rest of the argument types. */
5367 arg_types = tree_cons (NULL_TREE, ptr_type_node, void_list_node);
5368 if (use_aeabi_atexit)
5370 arg_types = tree_cons (NULL_TREE, fn_ptr_type, arg_types);
5371 arg_types = tree_cons (NULL_TREE, ptr_type_node, arg_types);
5375 arg_types = tree_cons (NULL_TREE, ptr_type_node, arg_types);
5376 arg_types = tree_cons (NULL_TREE, fn_ptr_type, arg_types);
5378 /* And the final __cxa_atexit type. */
5379 fn_type = build_function_type (integer_type_node, arg_types);
5380 fn_ptr_type = build_pointer_type (fn_type);
5381 if (use_aeabi_atexit)
5382 name = "__aeabi_atexit";
5384 name = "__cxa_atexit";
5388 /* The declaration for `atexit' is:
5390 int atexit (void (*)());
5392 We build up the argument types and then then function type
5394 fn_type = build_function_type (void_type_node, void_list_node);
5395 fn_ptr_type = build_pointer_type (fn_type);
5396 arg_types = tree_cons (NULL_TREE, fn_ptr_type, void_list_node);
5397 /* Build the final atexit type. */
5398 fn_type = build_function_type (integer_type_node, arg_types);
5402 /* Now, build the function declaration. */
5403 push_lang_context (lang_name_c);
5404 atexit_fndecl = build_library_fn_ptr (name, fn_type);
5405 mark_used (atexit_fndecl);
5406 pop_lang_context ();
5407 atexit_node = decay_conversion (atexit_fndecl);
5412 /* Returns the __dso_handle VAR_DECL. */
5415 get_dso_handle_node (void)
5417 if (dso_handle_node)
5418 return dso_handle_node;
5420 /* Declare the variable. */
5421 dso_handle_node = declare_global_var (get_identifier ("__dso_handle"),
5424 return dso_handle_node;
5427 /* Begin a new function with internal linkage whose job will be simply
5428 to destroy some particular variable. */
5430 static GTY(()) int start_cleanup_cnt;
5433 start_cleanup_fn (void)
5440 push_to_top_level ();
5442 /* No need to mangle this. */
5443 push_lang_context (lang_name_c);
5445 /* Build the parameter-types. */
5446 parmtypes = void_list_node;
5447 /* Functions passed to __cxa_atexit take an additional parameter.
5448 We'll just ignore it. After we implement the new calling
5449 convention for destructors, we can eliminate the use of
5450 additional cleanup functions entirely in the -fnew-abi case. */
5451 if (flag_use_cxa_atexit)
5452 parmtypes = tree_cons (NULL_TREE, ptr_type_node, parmtypes);
5453 /* Build the function type itself. */
5454 fntype = build_function_type (void_type_node, parmtypes);
5455 /* Build the name of the function. */
5456 sprintf (name, "__tcf_%d", start_cleanup_cnt++);
5457 /* Build the function declaration. */
5458 fndecl = build_lang_decl (FUNCTION_DECL, get_identifier (name), fntype);
5459 /* It's a function with internal linkage, generated by the
5461 TREE_PUBLIC (fndecl) = 0;
5462 DECL_ARTIFICIAL (fndecl) = 1;
5463 /* Make the function `inline' so that it is only emitted if it is
5464 actually needed. It is unlikely that it will be inlined, since
5465 it is only called via a function pointer, but we avoid unnecessary
5466 emissions this way. */
5467 DECL_INLINE (fndecl) = 1;
5468 DECL_DECLARED_INLINE_P (fndecl) = 1;
5469 DECL_INTERFACE_KNOWN (fndecl) = 1;
5470 /* Build the parameter. */
5471 if (flag_use_cxa_atexit)
5475 parmdecl = cp_build_parm_decl (NULL_TREE, ptr_type_node);
5476 DECL_CONTEXT (parmdecl) = fndecl;
5477 TREE_USED (parmdecl) = 1;
5478 DECL_ARGUMENTS (fndecl) = parmdecl;
5482 start_preparsed_function (fndecl, NULL_TREE, SF_PRE_PARSED);
5484 pop_lang_context ();
5486 return current_function_decl;
5489 /* Finish the cleanup function begun by start_cleanup_fn. */
5492 end_cleanup_fn (void)
5494 expand_or_defer_fn (finish_function (0));
5496 pop_from_top_level ();
5499 /* Generate code to handle the destruction of DECL, an object with
5500 static storage duration. */
5503 register_dtor_fn (tree decl)
5510 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
5511 return void_zero_node;
5513 /* Call build_cleanup before we enter the anonymous function so that
5514 any access checks will be done relative to the current scope,
5515 rather than the scope of the anonymous function. */
5516 build_cleanup (decl);
5518 /* Now start the function. */
5519 cleanup = start_cleanup_fn ();
5521 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
5522 to the original function, rather than the anonymous one. That
5523 will make the back-end think that nested functions are in use,
5524 which causes confusion. */
5526 push_deferring_access_checks (dk_no_check);
5527 fcall = build_cleanup (decl);
5528 pop_deferring_access_checks ();
5530 /* Create the body of the anonymous function. */
5531 compound_stmt = begin_compound_stmt (BCS_FN_BODY);
5532 finish_expr_stmt (fcall);
5533 finish_compound_stmt (compound_stmt);
5536 /* Call atexit with the cleanup function. */
5537 cxx_mark_addressable (cleanup);
5538 mark_used (cleanup);
5539 cleanup = build_unary_op (ADDR_EXPR, cleanup, 0);
5540 if (flag_use_cxa_atexit)
5542 args = tree_cons (NULL_TREE,
5543 build_unary_op (ADDR_EXPR, get_dso_handle_node (), 0),
5545 if (targetm.cxx.use_aeabi_atexit ())
5547 args = tree_cons (NULL_TREE, cleanup, args);
5548 args = tree_cons (NULL_TREE, null_pointer_node, args);
5552 args = tree_cons (NULL_TREE, null_pointer_node, args);
5553 args = tree_cons (NULL_TREE, cleanup, args);
5557 args = tree_cons (NULL_TREE, cleanup, NULL_TREE);
5558 return build_function_call (get_atexit_node (), args);
5561 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
5562 is its initializer. Generate code to handle the construction
5563 and destruction of DECL. */
5566 expand_static_init (tree decl, tree init)
5568 gcc_assert (TREE_CODE (decl) == VAR_DECL);
5569 gcc_assert (TREE_STATIC (decl));
5571 /* Some variables require no initialization. */
5573 && !TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl))
5574 && TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
5577 if (DECL_FUNCTION_SCOPE_P (decl))
5579 /* Emit code to perform this initialization but once. */
5580 tree if_stmt = NULL_TREE, inner_if_stmt = NULL_TREE;
5581 tree then_clause = NULL_TREE, inner_then_clause = NULL_TREE;
5582 tree guard, guard_addr, guard_addr_list;
5583 tree acquire_fn, release_fn, abort_fn;
5586 /* Emit code to perform this initialization but once. This code
5589 static <type> guard;
5590 if (!guard.first_byte) {
5591 if (__cxa_guard_acquire (&guard)) {
5594 // Do initialization.
5595 flag = true; __cxa_guard_release (&guard);
5596 // Register variable for destruction at end of program.
5598 if (!flag) __cxa_guard_abort (&guard);
5602 Note that the `flag' variable is only set to 1 *after* the
5603 initialization is complete. This ensures that an exception,
5604 thrown during the construction, will cause the variable to
5605 reinitialized when we pass through this code again, as per:
5609 If the initialization exits by throwing an exception, the
5610 initialization is not complete, so it will be tried again
5611 the next time control enters the declaration.
5613 This process should be thread-safe, too; multiple threads
5614 should not be able to initialize the variable more than
5617 /* Create the guard variable. */
5618 guard = get_guard (decl);
5620 /* This optimization isn't safe on targets with relaxed memory
5621 consistency. On such targets we force synchronization in
5622 __cxa_guard_acquire. */
5623 if (!targetm.relaxed_ordering || !flag_threadsafe_statics)
5625 /* Begin the conditional initialization. */
5626 if_stmt = begin_if_stmt ();
5627 finish_if_stmt_cond (get_guard_cond (guard), if_stmt);
5628 then_clause = begin_compound_stmt (BCS_NO_SCOPE);
5631 if (flag_threadsafe_statics)
5633 guard_addr = build_address (guard);
5634 guard_addr_list = build_tree_list (NULL_TREE, guard_addr);
5636 acquire_fn = get_identifier ("__cxa_guard_acquire");
5637 release_fn = get_identifier ("__cxa_guard_release");
5638 abort_fn = get_identifier ("__cxa_guard_abort");
5639 if (!get_global_value_if_present (acquire_fn, &acquire_fn))
5641 tree argtypes = tree_cons (NULL_TREE, TREE_TYPE (guard_addr),
5643 tree vfntype = build_function_type (void_type_node, argtypes);
5644 acquire_fn = push_library_fn
5645 (acquire_fn, build_function_type (integer_type_node, argtypes));
5646 release_fn = push_library_fn (release_fn, vfntype);
5647 abort_fn = push_library_fn (abort_fn, vfntype);
5651 release_fn = identifier_global_value (release_fn);
5652 abort_fn = identifier_global_value (abort_fn);
5655 inner_if_stmt = begin_if_stmt ();
5656 finish_if_stmt_cond (build_call (acquire_fn, guard_addr_list),
5659 inner_then_clause = begin_compound_stmt (BCS_NO_SCOPE);
5660 begin = get_target_expr (boolean_false_node);
5661 flag = TARGET_EXPR_SLOT (begin);
5663 TARGET_EXPR_CLEANUP (begin)
5664 = build3 (COND_EXPR, void_type_node, flag,
5666 build_call (abort_fn, guard_addr_list));
5667 CLEANUP_EH_ONLY (begin) = 1;
5669 /* Do the initialization itself. */
5670 init = add_stmt_to_compound (begin, init);
5671 init = add_stmt_to_compound
5672 (init, build2 (MODIFY_EXPR, void_type_node, flag, boolean_true_node));
5673 init = add_stmt_to_compound
5674 (init, build_call (release_fn, guard_addr_list));
5677 init = add_stmt_to_compound (init, set_guard (guard));
5679 /* Use atexit to register a function for destroying this static
5681 init = add_stmt_to_compound (init, register_dtor_fn (decl));
5683 finish_expr_stmt (init);
5685 if (flag_threadsafe_statics)
5687 finish_compound_stmt (inner_then_clause);
5688 finish_then_clause (inner_if_stmt);
5689 finish_if_stmt (inner_if_stmt);
5692 if (!targetm.relaxed_ordering || !flag_threadsafe_statics)
5694 finish_compound_stmt (then_clause);
5695 finish_then_clause (if_stmt);
5696 finish_if_stmt (if_stmt);
5700 static_aggregates = tree_cons (init, decl, static_aggregates);
5704 /* Make TYPE a complete type based on INITIAL_VALUE.
5705 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
5706 2 if there was no information (in which case assume 0 if DO_DEFAULT),
5707 3 if the initializer list is empty (in pedantic mode). */
5710 cp_complete_array_type (tree *ptype, tree initial_value, bool do_default)
5713 tree type, elt_type;
5717 /* An array of character type can be initialized from a
5718 brace-enclosed string constant.
5720 FIXME: this code is duplicated from reshape_init. Probably
5721 we should just call reshape_init here? */
5722 if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (*ptype)))
5723 && TREE_CODE (initial_value) == CONSTRUCTOR
5724 && !VEC_empty (constructor_elt, CONSTRUCTOR_ELTS (initial_value)))
5726 VEC(constructor_elt,gc) *v = CONSTRUCTOR_ELTS (initial_value);
5727 tree value = VEC_index (constructor_elt, v, 0)->value;
5729 if (TREE_CODE (value) == STRING_CST
5730 && VEC_length (constructor_elt, v) == 1)
5731 initial_value = value;
5735 failure = complete_array_type (ptype, initial_value, do_default);
5737 /* We can create the array before the element type is complete, which
5738 means that we didn't have these two bits set in the original type
5739 either. In completing the type, we are expected to propagate these
5740 bits. See also complete_type which does the same thing for arrays
5743 if (TYPE_DOMAIN (type))
5745 elt_type = TREE_TYPE (type);
5746 TYPE_NEEDS_CONSTRUCTING (type) = TYPE_NEEDS_CONSTRUCTING (elt_type);
5747 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type)
5748 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (elt_type);
5754 /* Return zero if something is declared to be a member of type
5755 CTYPE when in the context of CUR_TYPE. STRING is the error
5756 message to print in that case. Otherwise, quietly return 1. */
5759 member_function_or_else (tree ctype, tree cur_type, enum overload_flags flags)
5761 if (ctype && ctype != cur_type)
5763 if (flags == DTOR_FLAG)
5764 error ("destructor for alien class %qT cannot be a member", ctype);
5766 error ("constructor for alien class %qT cannot be a member", ctype);
5772 /* Subroutine of `grokdeclarator'. */
5774 /* Generate errors possibly applicable for a given set of specifiers.
5775 This is for ARM $7.1.2. */
5778 bad_specifiers (tree object,
5787 error ("%qD declared as a %<virtual%> %s", object, type);
5789 error ("%qD declared as an %<inline%> %s", object, type);
5791 error ("%<const%> and %<volatile%> function specifiers on "
5792 "%qD invalid in %s declaration",
5795 error ("%q+D declared as a friend", object);
5797 && (TREE_CODE (object) == TYPE_DECL
5798 || (!TYPE_PTRFN_P (TREE_TYPE (object))
5799 && !TYPE_REFFN_P (TREE_TYPE (object))
5800 && !TYPE_PTRMEMFUNC_P (TREE_TYPE (object)))))
5801 error ("%q+D declared with an exception specification", object);
5804 /* DECL is a member function or static data member and is presently
5805 being defined. Check that the definition is taking place in a
5809 check_class_member_definition_namespace (tree decl)
5811 /* These checks only apply to member functions and static data
5813 gcc_assert (TREE_CODE (decl) == FUNCTION_DECL
5814 || TREE_CODE (decl) == VAR_DECL);
5815 /* We check for problems with specializations in pt.c in
5816 check_specialization_namespace, where we can issue better
5818 if (processing_specialization)
5820 /* There are no restrictions on the placement of
5821 explicit instantiations. */
5822 if (processing_explicit_instantiation)
5826 A member function definition that appears outside of the
5827 class definition shall appear in a namespace scope enclosing
5828 the class definition.
5832 The definition for a static data member shall appear in a
5833 namespace scope enclosing the member's class definition. */
5834 if (!is_ancestor (current_namespace, DECL_CONTEXT (decl)))
5835 pedwarn ("definition of %qD is not in namespace enclosing %qT",
5836 decl, DECL_CONTEXT (decl));
5839 /* Build a PARM_DECL for the "this" parameter. TYPE is the
5840 METHOD_TYPE for a non-static member function; QUALS are the
5841 cv-qualifiers that apply to the function. */
5844 build_this_parm (tree type, cp_cv_quals quals)
5849 cp_cv_quals this_quals;
5851 this_type = TREE_VALUE (TYPE_ARG_TYPES (type));
5852 /* The `this' parameter is implicitly `const'; it cannot be
5854 this_quals = (quals & TYPE_QUAL_RESTRICT) | TYPE_QUAL_CONST;
5855 qual_type = cp_build_qualified_type (this_type, this_quals);
5856 parm = build_artificial_parm (this_identifier, qual_type);
5857 cp_apply_type_quals_to_decl (this_quals, parm);
5861 /* CTYPE is class type, or null if non-class.
5862 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
5864 DECLARATOR is the function's name.
5865 PARMS is a chain of PARM_DECLs for the function.
5866 VIRTUALP is truthvalue of whether the function is virtual or not.
5867 FLAGS are to be passed through to `grokclassfn'.
5868 QUALS are qualifiers indicating whether the function is `const'
5870 RAISES is a list of exceptions that this function can raise.
5871 CHECK is 1 if we must find this method in CTYPE, 0 if we should
5872 not look, and -1 if we should not call `grokclassfn' at all.
5874 SFK is the kind of special function (if any) for the new function.
5876 Returns `NULL_TREE' if something goes wrong, after issuing
5877 applicable error messages. */
5880 grokfndecl (tree ctype,
5884 tree orig_declarator,
5886 enum overload_flags flags,
5893 special_function_kind sfk,
5900 int staticp = ctype && TREE_CODE (type) == FUNCTION_TYPE;
5904 type = build_exception_variant (type, raises);
5906 decl = build_lang_decl (FUNCTION_DECL, declarator, type);
5907 if (TREE_CODE (type) == METHOD_TYPE)
5910 parm = build_this_parm (type, quals);
5911 TREE_CHAIN (parm) = parms;
5914 DECL_ARGUMENTS (decl) = parms;
5915 /* Propagate volatile out from type to decl. */
5916 if (TYPE_VOLATILE (type))
5917 TREE_THIS_VOLATILE (decl) = 1;
5920 && TREE_CODE (orig_declarator) == TEMPLATE_ID_EXPR)
5924 ("defining explicit specialization %qD in friend declaration",
5928 tree fns = TREE_OPERAND (orig_declarator, 0);
5929 tree args = TREE_OPERAND (orig_declarator, 1);
5931 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
5933 /* Something like `template <class T> friend void f<T>()'. */
5934 error ("invalid use of template-id %qD in declaration "
5935 "of primary template",
5941 /* A friend declaration of the form friend void f<>(). Record
5942 the information in the TEMPLATE_ID_EXPR. */
5943 SET_DECL_IMPLICIT_INSTANTIATION (decl);
5945 if (TREE_CODE (fns) == COMPONENT_REF)
5947 /* Due to bison parser ickiness, we will have already looked
5948 up an operator_name or PFUNCNAME within the current class
5949 (see template_id in parse.y). If the current class contains
5950 such a name, we'll get a COMPONENT_REF here. Undo that. */
5952 gcc_assert (TREE_TYPE (TREE_OPERAND (fns, 0))
5953 == current_class_type);
5954 fns = TREE_OPERAND (fns, 1);
5956 gcc_assert (TREE_CODE (fns) == IDENTIFIER_NODE
5957 || TREE_CODE (fns) == OVERLOAD);
5958 DECL_TEMPLATE_INFO (decl) = tree_cons (fns, args, NULL_TREE);
5960 for (t = TYPE_ARG_TYPES (TREE_TYPE (decl)); t; t = TREE_CHAIN (t))
5961 if (TREE_PURPOSE (t)
5962 && TREE_CODE (TREE_PURPOSE (t)) == DEFAULT_ARG)
5964 error ("default arguments are not allowed in declaration "
5965 "of friend template specialization %qD",
5972 error ("%<inline%> is not allowed in declaration of friend "
5973 "template specialization %qD",
5980 /* If this decl has namespace scope, set that up. */
5982 set_decl_namespace (decl, in_namespace, friendp);
5984 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
5986 /* `main' and builtins have implicit 'C' linkage. */
5987 if ((MAIN_NAME_P (declarator)
5988 || (IDENTIFIER_LENGTH (declarator) > 10
5989 && IDENTIFIER_POINTER (declarator)[0] == '_'
5990 && IDENTIFIER_POINTER (declarator)[1] == '_'
5991 && strncmp (IDENTIFIER_POINTER (declarator)+2, "builtin_", 8) == 0))
5992 && current_lang_name == lang_name_cplusplus
5993 && ctype == NULL_TREE
5994 /* NULL_TREE means global namespace. */
5995 && DECL_CONTEXT (decl) == NULL_TREE)
5996 SET_DECL_LANGUAGE (decl, lang_c);
5998 /* Should probably propagate const out from type to decl I bet (mrs). */
6001 DECL_STATIC_FUNCTION_P (decl) = 1;
6002 DECL_CONTEXT (decl) = ctype;
6007 DECL_CONTEXT (decl) = ctype;
6009 check_class_member_definition_namespace (decl);
6012 if (ctype == NULL_TREE && DECL_MAIN_P (decl))
6014 if (processing_template_decl)
6015 error ("cannot declare %<::main%> to be a template");
6017 error ("cannot declare %<::main%> to be inline");
6019 error ("cannot declare %<::main%> to be static");
6020 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl)),
6023 tree oldtypeargs = TYPE_ARG_TYPES (TREE_TYPE (decl));
6025 error ("%<::main%> must return %<int%>");
6026 newtype = build_function_type (integer_type_node,
6028 TREE_TYPE (decl) = newtype;
6034 /* Members of anonymous types and local classes have no linkage; make
6035 them internal. If a typedef is made later, this will be changed. */
6036 if (ctype && (TYPE_ANONYMOUS_P (ctype)
6037 || decl_function_context (TYPE_MAIN_DECL (ctype))))
6042 /* [basic.link]: A name with no linkage (notably, the name of a class
6043 or enumeration declared in a local scope) shall not be used to
6044 declare an entity with linkage.
6046 Only check this for public decls for now. See core 319, 389. */
6047 t = no_linkage_check (TREE_TYPE (decl),
6048 /*relaxed_p=*/false);
6051 if (TYPE_ANONYMOUS_P (t))
6053 if (DECL_EXTERN_C_P (decl))
6054 /* Allow this; it's pretty common in C. */;
6057 pedwarn ("non-local function %q#D uses anonymous type",
6059 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
6060 pedwarn ("%q+#D does not refer to the unqualified "
6061 "type, so it is not used for linkage",
6066 pedwarn ("non-local function %q#D uses local type %qT", decl, t);
6070 TREE_PUBLIC (decl) = publicp;
6073 DECL_INTERFACE_KNOWN (decl) = 1;
6074 DECL_NOT_REALLY_EXTERN (decl) = 1;
6077 /* If the declaration was declared inline, mark it as such. */
6079 DECL_DECLARED_INLINE_P (decl) = 1;
6080 /* We inline functions that are explicitly declared inline, or, when
6081 the user explicitly asks us to, all functions. */
6082 if (DECL_DECLARED_INLINE_P (decl)
6083 || (flag_inline_trees == 2 && !DECL_INLINE (decl) && funcdef_flag))
6084 DECL_INLINE (decl) = 1;
6086 DECL_EXTERNAL (decl) = 1;
6087 if (quals && TREE_CODE (type) == FUNCTION_TYPE)
6090 ? G_("static member function %qD cannot have cv-qualifier")
6091 : G_("non-static member function %qD cannot have cv-qualifier"),
6093 quals = TYPE_UNQUALIFIED;
6096 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl))
6097 && !grok_op_properties (decl, /*complain=*/true))
6100 if (ctype && decl_function_context (decl))
6101 DECL_NO_STATIC_CHAIN (decl) = 1;
6104 /* Make the init_value nonzero so pushdecl knows this is not
6105 tentative. error_mark_node is replaced later with the BLOCK. */
6106 DECL_INITIAL (decl) = error_mark_node;
6108 if (TYPE_NOTHROW_P (type) || nothrow_libfn_p (decl))
6109 TREE_NOTHROW (decl) = 1;
6111 /* Caller will do the rest of this. */
6115 if (ctype != NULL_TREE)
6117 if (sfk == sfk_constructor)
6118 DECL_CONSTRUCTOR_P (decl) = 1;
6120 grokclassfn (ctype, decl, flags);
6123 decl = check_explicit_specialization (orig_declarator, decl,
6126 4 * (friendp != 0));
6127 if (decl == error_mark_node)
6132 cplus_decl_attributes (&decl, *attrlist, 0);
6133 *attrlist = NULL_TREE;
6136 if (ctype != NULL_TREE
6137 && (! TYPE_FOR_JAVA (ctype) || check_java_method (decl))
6142 old_decl = check_classfn (ctype, decl,
6143 (processing_template_decl
6144 > template_class_depth (ctype))
6145 ? current_template_parms
6152 if (TREE_CODE (old_decl) == TEMPLATE_DECL)
6153 /* Because grokfndecl is always supposed to return a
6154 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
6155 here. We depend on our callers to figure out that its
6156 really a template that's being returned. */
6157 old_decl = DECL_TEMPLATE_RESULT (old_decl);
6159 if (DECL_STATIC_FUNCTION_P (old_decl)
6160 && TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE)
6161 /* Remove the `this' parm added by grokclassfn.
6162 XXX Isn't this done in start_function, too? */
6163 revert_static_member_fn (decl);
6164 if (DECL_ARTIFICIAL (old_decl))
6165 error ("definition of implicitly-declared %qD", old_decl);
6167 /* Since we've smashed OLD_DECL to its
6168 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
6169 if (TREE_CODE (decl) == TEMPLATE_DECL)
6170 decl = DECL_TEMPLATE_RESULT (decl);
6172 /* Attempt to merge the declarations. This can fail, in
6173 the case of some invalid specialization declarations. */
6174 pushed_scope = push_scope (ctype);
6175 ok = duplicate_decls (decl, old_decl, friendp);
6177 pop_scope (pushed_scope);
6180 error ("no %q#D member function declared in class %qT",
6188 if (DECL_CONSTRUCTOR_P (decl) && !grok_ctor_properties (ctype, decl))
6191 if (ctype == NULL_TREE || check)
6195 DECL_VIRTUAL_P (decl) = 1;
6200 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
6201 the linkage that DECL will receive in the object file. */
6204 set_linkage_for_static_data_member (tree decl)
6206 /* A static data member always has static storage duration and
6207 external linkage. Note that static data members are forbidden in
6208 local classes -- the only situation in which a class has
6209 non-external linkage. */
6210 TREE_PUBLIC (decl) = 1;
6211 TREE_STATIC (decl) = 1;
6212 /* For non-template classes, static data members are always put
6213 out in exactly those files where they are defined, just as
6214 with ordinary namespace-scope variables. */
6215 if (!processing_template_decl)
6216 DECL_INTERFACE_KNOWN (decl) = 1;
6219 /* Create a VAR_DECL named NAME with the indicated TYPE.
6221 If SCOPE is non-NULL, it is the class type or namespace containing
6222 the variable. If SCOPE is NULL, the variable should is created in
6223 the innermost enclosings scope. */
6226 grokvardecl (tree type,
6228 const cp_decl_specifier_seq *declspecs,
6234 tree explicit_scope;
6236 gcc_assert (!name || TREE_CODE (name) == IDENTIFIER_NODE);
6238 /* Compute the scope in which to place the variable, but remember
6239 whether or not that scope was explicitly specified by the user. */
6240 explicit_scope = scope;
6243 /* An explicit "extern" specifier indicates a namespace-scope
6245 if (declspecs->storage_class == sc_extern)
6246 scope = current_namespace;
6247 else if (!at_function_scope_p ())
6248 scope = current_scope ();
6252 && (/* If the variable is a namespace-scope variable declared in a
6253 template, we need DECL_LANG_SPECIFIC. */
6254 (TREE_CODE (scope) == NAMESPACE_DECL && processing_template_decl)
6255 /* Similarly for namespace-scope variables with language linkage
6257 || (TREE_CODE (scope) == NAMESPACE_DECL
6258 && current_lang_name != lang_name_cplusplus)
6259 /* Similarly for static data members. */
6261 decl = build_lang_decl (VAR_DECL, name, type);
6263 decl = build_decl (VAR_DECL, name, type);
6265 if (explicit_scope && TREE_CODE (explicit_scope) == NAMESPACE_DECL)
6266 set_decl_namespace (decl, explicit_scope, 0);
6268 DECL_CONTEXT (decl) = FROB_CONTEXT (scope);
6270 if (declspecs->storage_class == sc_extern)
6272 DECL_THIS_EXTERN (decl) = 1;
6273 DECL_EXTERNAL (decl) = !initialized;
6276 if (DECL_CLASS_SCOPE_P (decl))
6278 set_linkage_for_static_data_member (decl);
6279 /* This function is only called with out-of-class definitions. */
6280 DECL_EXTERNAL (decl) = 0;
6281 check_class_member_definition_namespace (decl);
6283 /* At top level, either `static' or no s.c. makes a definition
6284 (perhaps tentative), and absence of `static' makes it public. */
6285 else if (toplevel_bindings_p ())
6287 TREE_PUBLIC (decl) = (declspecs->storage_class != sc_static
6288 && (DECL_THIS_EXTERN (decl) || ! constp));
6289 TREE_STATIC (decl) = ! DECL_EXTERNAL (decl);
6291 /* Not at top level, only `static' makes a static definition. */
6294 TREE_STATIC (decl) = declspecs->storage_class == sc_static;
6295 TREE_PUBLIC (decl) = DECL_EXTERNAL (decl);
6298 if (declspecs->specs[(int)ds_thread])
6300 if (targetm.have_tls)
6301 DECL_TLS_MODEL (decl) = decl_default_tls_model (decl);
6303 /* A mere warning is sure to result in improper semantics
6304 at runtime. Don't bother to allow this to compile. */
6305 error ("thread-local storage not supported for this target");
6308 if (TREE_PUBLIC (decl))
6310 /* [basic.link]: A name with no linkage (notably, the name of a class
6311 or enumeration declared in a local scope) shall not be used to
6312 declare an entity with linkage.
6314 Only check this for public decls for now. */
6315 tree t = no_linkage_check (TREE_TYPE (decl), /*relaxed_p=*/false);
6318 if (TYPE_ANONYMOUS_P (t))
6320 if (DECL_EXTERN_C_P (decl))
6321 /* Allow this; it's pretty common in C. */
6325 /* DRs 132, 319 and 389 seem to indicate types with
6326 no linkage can only be used to declare extern "C"
6327 entities. Since it's not always an error in the
6328 ISO C++ 90 Standard, we only issue a warning. */
6329 warning (0, "non-local variable %q#D uses anonymous type",
6331 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
6332 warning (0, "%q+#D does not refer to the unqualified "
6333 "type, so it is not used for linkage",
6338 warning (0, "non-local variable %q#D uses local type %qT", decl, t);
6342 DECL_INTERFACE_KNOWN (decl) = 1;
6347 /* Create and return a canonical pointer to member function type, for
6348 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
6351 build_ptrmemfunc_type (tree type)
6355 tree unqualified_variant = NULL_TREE;
6357 if (type == error_mark_node)
6360 /* If a canonical type already exists for this type, use it. We use
6361 this method instead of type_hash_canon, because it only does a
6362 simple equality check on the list of field members. */
6364 if ((t = TYPE_GET_PTRMEMFUNC_TYPE (type)))
6367 /* Make sure that we always have the unqualified pointer-to-member
6369 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
6371 = build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type));
6373 t = make_aggr_type (RECORD_TYPE);
6374 xref_basetypes (t, NULL_TREE);
6376 /* Let the front-end know this is a pointer to member function... */
6377 TYPE_PTRMEMFUNC_FLAG (t) = 1;
6378 /* ... and not really an aggregate. */
6379 SET_IS_AGGR_TYPE (t, 0);
6381 field = build_decl (FIELD_DECL, pfn_identifier, type);
6384 field = build_decl (FIELD_DECL, delta_identifier, delta_type_node);
6385 TREE_CHAIN (field) = fields;
6388 finish_builtin_struct (t, "__ptrmemfunc_type", fields, ptr_type_node);
6390 /* Zap out the name so that the back-end will give us the debugging
6391 information for this anonymous RECORD_TYPE. */
6392 TYPE_NAME (t) = NULL_TREE;
6394 /* If this is not the unqualified form of this pointer-to-member
6395 type, set the TYPE_MAIN_VARIANT for this type to be the
6396 unqualified type. Since they are actually RECORD_TYPEs that are
6397 not variants of each other, we must do this manually. */
6398 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
6400 t = build_qualified_type (t, cp_type_quals (type));
6401 TYPE_MAIN_VARIANT (t) = unqualified_variant;
6402 TYPE_NEXT_VARIANT (t) = TYPE_NEXT_VARIANT (unqualified_variant);
6403 TYPE_NEXT_VARIANT (unqualified_variant) = t;
6406 /* Cache this pointer-to-member type so that we can find it again
6408 TYPE_SET_PTRMEMFUNC_TYPE (type, t);
6413 /* Create and return a pointer to data member type. */
6416 build_ptrmem_type (tree class_type, tree member_type)
6418 if (TREE_CODE (member_type) == METHOD_TYPE)
6422 arg_types = TYPE_ARG_TYPES (member_type);
6423 class_type = (cp_build_qualified_type
6425 cp_type_quals (TREE_TYPE (TREE_VALUE (arg_types)))));
6427 = build_method_type_directly (class_type,
6428 TREE_TYPE (member_type),
6429 TREE_CHAIN (arg_types));
6430 return build_ptrmemfunc_type (build_pointer_type (member_type));
6434 gcc_assert (TREE_CODE (member_type) != FUNCTION_TYPE);
6435 return build_offset_type (class_type, member_type);
6439 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
6440 Check to see that the definition is valid. Issue appropriate error
6441 messages. Return 1 if the definition is particularly bad, or 0
6445 check_static_variable_definition (tree decl, tree type)
6447 /* Motion 10 at San Diego: If a static const integral data member is
6448 initialized with an integral constant expression, the initializer
6449 may appear either in the declaration (within the class), or in
6450 the definition, but not both. If it appears in the class, the
6451 member is a member constant. The file-scope definition is always
6453 if (!ARITHMETIC_TYPE_P (type) && TREE_CODE (type) != ENUMERAL_TYPE)
6455 error ("invalid in-class initialization of static data member "
6456 "of non-integral type %qT",
6458 /* If we just return the declaration, crashes will sometimes
6459 occur. We therefore return void_type_node, as if this were a
6460 friend declaration, to cause callers to completely ignore
6461 this declaration. */
6464 else if (!CP_TYPE_CONST_P (type))
6465 error ("ISO C++ forbids in-class initialization of non-const "
6466 "static member %qD",
6468 else if (pedantic && !INTEGRAL_TYPE_P (type))
6469 pedwarn ("ISO C++ forbids initialization of member constant "
6470 "%qD of non-integral type %qT", decl, type);
6475 /* Given the SIZE (i.e., number of elements) in an array, compute an
6476 appropriate index type for the array. If non-NULL, NAME is the
6477 name of the thing being declared. */
6480 compute_array_index_type (tree name, tree size)
6485 if (error_operand_p (size))
6486 return error_mark_node;
6488 type = TREE_TYPE (size);
6489 /* The array bound must be an integer type. */
6490 if (!dependent_type_p (type) && !INTEGRAL_TYPE_P (type))
6493 error ("size of array %qD has non-integral type %qT", name, type);
6495 error ("size of array has non-integral type %qT", type);
6496 size = integer_one_node;
6497 type = TREE_TYPE (size);
6500 if (abi_version_at_least (2)
6501 /* We should only handle value dependent expressions specially. */
6502 ? value_dependent_expression_p (size)
6503 /* But for abi-1, we handled all instances in templates. This
6504 effects the manglings produced. */
6505 : processing_template_decl)
6506 return build_index_type (build_min (MINUS_EXPR, sizetype,
6507 size, integer_one_node));
6509 /* The size might be the result of a cast. */
6510 STRIP_TYPE_NOPS (size);
6512 /* It might be a const variable or enumeration constant. */
6513 size = integral_constant_value (size);
6515 /* Normally, the array-bound will be a constant. */
6516 if (TREE_CODE (size) == INTEGER_CST)
6518 /* Check to see if the array bound overflowed. Make that an
6519 error, no matter how generous we're being. */
6520 int old_flag_pedantic_errors = flag_pedantic_errors;
6521 int old_pedantic = pedantic;
6522 pedantic = flag_pedantic_errors = 1;
6523 constant_expression_warning (size);
6524 pedantic = old_pedantic;
6525 flag_pedantic_errors = old_flag_pedantic_errors;
6527 /* An array must have a positive number of elements. */
6528 if (INT_CST_LT (size, integer_zero_node))
6531 error ("size of array %qD is negative", name);
6533 error ("size of array is negative");
6534 size = integer_one_node;
6536 /* As an extension we allow zero-sized arrays. We always allow
6537 them in system headers because glibc uses them. */
6538 else if (integer_zerop (size) && pedantic && !in_system_header)
6541 pedwarn ("ISO C++ forbids zero-size array %qD", name);
6543 pedwarn ("ISO C++ forbids zero-size array");
6546 else if (TREE_CONSTANT (size))
6548 /* `(int) &fn' is not a valid array bound. */
6550 error ("size of array %qD is not an integral constant-expression",
6553 error ("size of array is not an integral constant-expression");
6554 size = integer_one_node;
6559 pedwarn ("ISO C++ forbids variable-size array %qD", name);
6561 pedwarn ("ISO C++ forbids variable-size array");
6564 if (processing_template_decl && !TREE_CONSTANT (size))
6565 /* A variable sized array. */
6566 itype = build_min (MINUS_EXPR, sizetype, size, integer_one_node);
6569 HOST_WIDE_INT saved_processing_template_decl;
6571 /* Compute the index of the largest element in the array. It is
6572 one less than the number of elements in the array. We save
6573 and restore PROCESSING_TEMPLATE_DECL so that computations in
6574 cp_build_binary_op will be appropriately folded. */
6575 saved_processing_template_decl = processing_template_decl;
6576 processing_template_decl = 0;
6577 itype = cp_build_binary_op (MINUS_EXPR,
6578 cp_convert (ssizetype, size),
6579 cp_convert (ssizetype, integer_one_node));
6580 itype = fold (itype);
6581 processing_template_decl = saved_processing_template_decl;
6583 if (!TREE_CONSTANT (itype))
6584 /* A variable sized array. */
6585 itype = variable_size (itype);
6586 /* Make sure that there was no overflow when creating to a signed
6587 index type. (For example, on a 32-bit machine, an array with
6588 size 2^32 - 1 is too big.) */
6589 else if (TREE_CODE (itype) == INTEGER_CST
6590 && TREE_OVERFLOW (itype))
6592 error ("overflow in array dimension");
6593 TREE_OVERFLOW (itype) = 0;
6597 /* Create and return the appropriate index type. */
6598 return build_index_type (itype);
6601 /* Returns the scope (if any) in which the entity declared by
6602 DECLARATOR will be located. If the entity was declared with an
6603 unqualified name, NULL_TREE is returned. */
6606 get_scope_of_declarator (const cp_declarator *declarator)
6608 while (declarator && declarator->kind != cdk_id)
6609 declarator = declarator->declarator;
6611 /* If the declarator-id is a SCOPE_REF, the scope in which the
6612 declaration occurs is the first operand. */
6614 && declarator->u.id.qualifying_scope)
6615 return declarator->u.id.qualifying_scope;
6617 /* Otherwise, the declarator is not a qualified name; the entity will
6618 be declared in the current scope. */
6622 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
6623 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
6627 create_array_type_for_decl (tree name, tree type, tree size)
6629 tree itype = NULL_TREE;
6630 const char* error_msg;
6632 /* If things have already gone awry, bail now. */
6633 if (type == error_mark_node || size == error_mark_node)
6634 return error_mark_node;
6636 /* Assume that everything will go OK. */
6639 /* There are some types which cannot be array elements. */
6640 switch (TREE_CODE (type))
6643 error_msg = "array of void";
6647 error_msg = "array of functions";
6650 case REFERENCE_TYPE:
6651 error_msg = "array of references";
6655 error_msg = "array of function members";
6662 /* If something went wrong, issue an error-message and return. */
6666 error ("declaration of %qD as %s", name, error_msg);
6668 error ("creating %s", error_msg);
6670 return error_mark_node;
6675 The constant expressions that specify the bounds of the arrays
6676 can be omitted only for the first member of the sequence. */
6677 if (TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type))
6680 error ("declaration of %qD as multidimensional array must "
6681 "have bounds for all dimensions except the first",
6684 error ("multidimensional array must have bounds for all "
6685 "dimensions except the first");
6687 return error_mark_node;
6690 /* Figure out the index type for the array. */
6692 itype = compute_array_index_type (name, size);
6695 T is called the array element type; this type shall not be [...] an
6696 abstract class type. */
6697 abstract_virtuals_error (name, type);
6699 return build_cplus_array_type (type, itype);
6702 /* Check that it's OK to declare a function with the indicated TYPE.
6703 SFK indicates the kind of special function (if any) that this
6704 function is. OPTYPE is the type given in a conversion operator
6705 declaration, or the class type for a constructor/destructor.
6706 Returns the actual return type of the function; that
6707 may be different than TYPE if an error occurs, or for certain
6708 special functions. */
6711 check_special_function_return_type (special_function_kind sfk,
6717 case sfk_constructor:
6719 error ("return type specification for constructor invalid");
6721 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
6722 type = build_pointer_type (optype);
6724 type = void_type_node;
6727 case sfk_destructor:
6729 error ("return type specification for destructor invalid");
6730 /* We can't use the proper return type here because we run into
6731 problems with ambiguous bases and covariant returns.
6732 Java classes are left unchanged because (void *) isn't a valid
6733 Java type, and we don't want to change the Java ABI. */
6734 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
6735 type = build_pointer_type (void_type_node);
6737 type = void_type_node;
6740 case sfk_conversion:
6741 if (type && !same_type_p (type, optype))
6742 error ("operator %qT declared to return %qT", optype, type);
6744 pedwarn ("return type specified for %<operator %T%>", optype);
6755 /* A variable or data member (whose unqualified name is IDENTIFIER)
6756 has been declared with the indicated TYPE. If the TYPE is not
6757 acceptable, issue an error message and return a type to use for
6758 error-recovery purposes. */
6761 check_var_type (tree identifier, tree type)
6763 if (VOID_TYPE_P (type))
6766 error ("unnamed variable or field declared void");
6767 else if (TREE_CODE (identifier) == IDENTIFIER_NODE)
6769 gcc_assert (!IDENTIFIER_OPNAME_P (identifier));
6770 error ("variable or field %qE declared void", identifier);
6773 error ("variable or field declared void");
6774 type = error_mark_node;
6780 /* Given declspecs and a declarator (abstract or otherwise), determine
6781 the name and type of the object declared and construct a DECL node
6784 DECLSPECS is a chain of tree_list nodes whose value fields
6785 are the storage classes and type specifiers.
6787 DECL_CONTEXT says which syntactic context this declaration is in:
6788 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
6789 FUNCDEF for a function definition. Like NORMAL but a few different
6790 error messages in each case. Return value may be zero meaning
6791 this definition is too screwy to try to parse.
6792 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
6793 handle member functions (which have FIELD context).
6794 Return value may be zero meaning this definition is too screwy to
6796 PARM for a parameter declaration (either within a function prototype
6797 or before a function body). Make a PARM_DECL, or return void_type_node.
6798 CATCHPARM for a parameter declaration before a catch clause.
6799 TYPENAME if for a typename (in a cast or sizeof).
6800 Don't make a DECL node; just return the ..._TYPE node.
6801 FIELD for a struct or union field; make a FIELD_DECL.
6802 BITFIELD for a field with specified width.
6803 INITIALIZED is 1 if the decl has an initializer.
6805 ATTRLIST is a pointer to the list of attributes, which may be NULL
6806 if there are none; *ATTRLIST may be modified if attributes from inside
6807 the declarator should be applied to the declaration.
6809 When this function is called, scoping variables (such as
6810 CURRENT_CLASS_TYPE) should reflect the scope in which the
6811 declaration occurs, not the scope in which the new declaration will
6812 be placed. For example, on:
6816 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
6819 Returns a DECL (if a declarator is present), a TYPE (if there is no
6820 declarator, in cases like "struct S;"), or the ERROR_MARK_NODE if an
6824 grokdeclarator (const cp_declarator *declarator,
6825 const cp_decl_specifier_seq *declspecs,
6826 enum decl_context decl_context,
6830 tree type = NULL_TREE;
6832 int virtualp, explicitp, friendp, inlinep, staticp;
6833 int explicit_int = 0;
6834 int explicit_char = 0;
6835 int defaulted_int = 0;
6836 tree dependent_name = NULL_TREE;
6838 tree typedef_decl = NULL_TREE;
6839 const char *name = NULL;
6840 tree typedef_type = NULL_TREE;
6841 /* True if this declarator is a function definition. */
6842 bool funcdef_flag = false;
6843 cp_declarator_kind innermost_code = cdk_error;
6846 /* See the code below that used this. */
6847 tree decl_attr = NULL_TREE;
6850 /* Keep track of what sort of function is being processed
6851 so that we can warn about default return values, or explicit
6852 return values which do not match prescribed defaults. */
6853 special_function_kind sfk = sfk_none;
6855 tree dname = NULL_TREE;
6856 tree ctor_return_type = NULL_TREE;
6857 enum overload_flags flags = NO_SPECIAL;
6858 /* cv-qualifiers that apply to the declarator, for a declaration of
6859 a member function. */
6860 cp_cv_quals memfn_quals = TYPE_UNQUALIFIED;
6861 /* cv-qualifiers that apply to the type specified by the DECLSPECS. */
6863 tree raises = NULL_TREE;
6864 int template_count = 0;
6865 tree returned_attrs = NULL_TREE;
6866 tree parms = NULL_TREE;
6867 const cp_declarator *id_declarator;
6868 /* The unqualified name of the declarator; either an
6869 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
6870 tree unqualified_id;
6871 /* The class type, if any, in which this entity is located,
6872 or NULL_TREE if none. Note that this value may be different from
6873 the current class type; for example if an attempt is made to declare
6874 "A::f" inside "B", this value will be "A". */
6875 tree ctype = current_class_type;
6876 /* The NAMESPACE_DECL for the namespace in which this entity is
6877 located. If an unqualified name is used to declare the entity,
6878 this value will be NULL_TREE, even if the entity is located at
6880 tree in_namespace = NULL_TREE;
6881 cp_storage_class storage_class;
6882 bool unsigned_p, signed_p, short_p, long_p, thread_p;
6883 bool type_was_error_mark_node = false;
6885 signed_p = declspecs->specs[(int)ds_signed];
6886 unsigned_p = declspecs->specs[(int)ds_unsigned];
6887 short_p = declspecs->specs[(int)ds_short];
6888 long_p = declspecs->specs[(int)ds_long];
6889 longlong = declspecs->specs[(int)ds_long] >= 2;
6890 thread_p = declspecs->specs[(int)ds_thread];
6892 if (decl_context == FUNCDEF)
6893 funcdef_flag = true, decl_context = NORMAL;
6894 else if (decl_context == MEMFUNCDEF)
6895 funcdef_flag = true, decl_context = FIELD;
6896 else if (decl_context == BITFIELD)
6897 bitfield = 1, decl_context = FIELD;
6899 /* Look inside a declarator for the name being declared
6900 and get it as a string, for an error message. */
6901 for (id_declarator = declarator;
6903 id_declarator = id_declarator->declarator)
6905 if (id_declarator->kind != cdk_id)
6906 innermost_code = id_declarator->kind;
6908 switch (id_declarator->kind)
6911 if (id_declarator->declarator
6912 && id_declarator->declarator->kind == cdk_id)
6914 sfk = id_declarator->declarator->u.id.sfk;
6915 if (sfk == sfk_destructor)
6922 tree qualifying_scope = id_declarator->u.id.qualifying_scope;
6923 tree decl = id_declarator->u.id.unqualified_name;
6926 if (qualifying_scope)
6928 if (at_function_scope_p ())
6932 A declarator-id shall not be qualified except
6935 None of the cases are permitted in block
6937 if (qualifying_scope == global_namespace)
6938 error ("invalid use of qualified-name %<::%D%>",
6940 else if (TYPE_P (qualifying_scope))
6941 error ("invalid use of qualified-name %<%T::%D%>",
6942 qualifying_scope, decl);
6944 error ("invalid use of qualified-name %<%D::%D%>",
6945 qualifying_scope, decl);
6946 return error_mark_node;
6948 else if (TYPE_P (qualifying_scope))
6950 ctype = qualifying_scope;
6951 if (innermost_code != cdk_function
6952 && current_class_type
6953 && !UNIQUELY_DERIVED_FROM_P (ctype,
6954 current_class_type))
6956 error ("type %qT is not derived from type %qT",
6957 ctype, current_class_type);
6958 return error_mark_node;
6961 else if (TREE_CODE (qualifying_scope) == NAMESPACE_DECL)
6962 in_namespace = qualifying_scope;
6964 switch (TREE_CODE (decl))
6970 if (innermost_code != cdk_function)
6972 error ("declaration of %qD as non-function", decl);
6973 return error_mark_node;
6975 else if (!qualifying_scope
6976 && !(current_class_type && at_class_scope_p ()))
6978 error ("declaration of %qD as non-member", decl);
6979 return error_mark_node;
6982 type = TREE_OPERAND (decl, 0);
6983 name = IDENTIFIER_POINTER (constructor_name (type));
6988 case TEMPLATE_ID_EXPR:
6990 tree fns = TREE_OPERAND (decl, 0);
6993 if (TREE_CODE (dname) != IDENTIFIER_NODE)
6995 gcc_assert (is_overloaded_fn (dname));
6996 dname = DECL_NAME (get_first_fn (dname));
7001 case IDENTIFIER_NODE:
7002 if (TREE_CODE (decl) == IDENTIFIER_NODE)
7005 if (C_IS_RESERVED_WORD (dname))
7007 error ("declarator-id missing; using reserved word %qD",
7009 name = IDENTIFIER_POINTER (dname);
7011 else if (!IDENTIFIER_TYPENAME_P (dname))
7012 name = IDENTIFIER_POINTER (dname);
7015 gcc_assert (flags == NO_SPECIAL);
7016 flags = TYPENAME_FLAG;
7017 ctor_return_type = TREE_TYPE (dname);
7018 sfk = sfk_conversion;
7019 if (is_typename_at_global_scope (dname))
7020 name = IDENTIFIER_POINTER (dname);
7022 name = "<invalid operator>";
7038 return error_mark_node;
7044 if (id_declarator->kind == cdk_id)
7050 The declarator in a function-definition shall have the form
7051 D1 ( parameter-declaration-clause) ... */
7052 if (funcdef_flag && innermost_code != cdk_function)
7054 error ("function definition does not declare parameters");
7055 return error_mark_node;
7058 if (((dname && IDENTIFIER_OPNAME_P (dname)) || flags == TYPENAME_FLAG)
7059 && innermost_code != cdk_function
7060 && ! (ctype && !declspecs->any_specifiers_p))
7062 error ("declaration of %qD as non-function", dname);
7063 return error_mark_node;
7066 /* Anything declared one level down from the top level
7067 must be one of the parameters of a function
7068 (because the body is at least two levels down). */
7070 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
7071 by not allowing C++ class definitions to specify their parameters
7072 with xdecls (must be spec.d in the parmlist).
7074 Since we now wait to push a class scope until we are sure that
7075 we are in a legitimate method context, we must set oldcname
7076 explicitly (since current_class_name is not yet alive).
7078 We also want to avoid calling this a PARM if it is in a namespace. */
7080 if (decl_context == NORMAL && !toplevel_bindings_p ())
7082 struct cp_binding_level *b = current_binding_level;
7083 current_binding_level = b->level_chain;
7084 if (current_binding_level != 0 && toplevel_bindings_p ())
7085 decl_context = PARM;
7086 current_binding_level = b;
7090 name = decl_context == PARM ? "parameter" : "type name";
7092 /* If there were multiple types specified in the decl-specifier-seq,
7093 issue an error message. */
7094 if (declspecs->multiple_types_p)
7096 error ("two or more data types in declaration of %qs", name);
7097 return error_mark_node;
7100 /* Extract the basic type from the decl-specifier-seq. */
7101 type = declspecs->type;
7102 if (type == error_mark_node)
7105 type_was_error_mark_node = true;
7107 /* If the entire declaration is itself tagged as deprecated then
7108 suppress reports of deprecated items. */
7109 if (type && TREE_DEPRECATED (type)
7110 && deprecated_state != DEPRECATED_SUPPRESS)
7111 warn_deprecated_use (type);
7112 if (type && TREE_CODE (type) == TYPE_DECL)
7114 typedef_decl = type;
7115 type = TREE_TYPE (typedef_decl);
7117 /* No type at all: default to `int', and set DEFAULTED_INT
7118 because it was not a user-defined typedef. */
7119 if (type == NULL_TREE && (signed_p || unsigned_p || long_p || short_p))
7121 /* These imply 'int'. */
7122 type = integer_type_node;
7126 explicit_int = declspecs->explicit_int_p;
7127 explicit_char = declspecs->explicit_char_p;
7130 /* See the code below that used this. */
7132 decl_attr = DECL_ATTRIBUTES (typedef_decl);
7134 typedef_type = type;
7137 if (sfk != sfk_conversion)
7138 ctor_return_type = ctype;
7140 if (sfk != sfk_none)
7141 type = check_special_function_return_type (sfk, type,
7143 else if (type == NULL_TREE)
7149 /* We handle `main' specially here, because 'main () { }' is so
7150 common. With no options, it is allowed. With -Wreturn-type,
7151 it is a warning. It is only an error with -pedantic-errors. */
7152 is_main = (funcdef_flag
7153 && dname && MAIN_NAME_P (dname)
7154 && ctype == NULL_TREE
7155 && in_namespace == NULL_TREE
7156 && current_namespace == global_namespace);
7158 if (type_was_error_mark_node)
7159 /* We've already issued an error, don't complain more. */;
7160 else if (in_system_header || flag_ms_extensions)
7161 /* Allow it, sigh. */;
7162 else if (pedantic || ! is_main)
7163 pedwarn ("ISO C++ forbids declaration of %qs with no type", name);
7164 else if (warn_return_type)
7165 warning (0, "ISO C++ forbids declaration of %qs with no type", name);
7167 type = integer_type_node;
7172 /* Now process the modifiers that were specified
7173 and check for invalid combinations. */
7175 /* Long double is a special combination. */
7176 if (long_p && !longlong && TYPE_MAIN_VARIANT (type) == double_type_node)
7179 type = build_qualified_type (long_double_type_node,
7180 cp_type_quals (type));
7183 /* Check all other uses of type modifiers. */
7185 if (unsigned_p || signed_p || long_p || short_p)
7189 if ((signed_p || unsigned_p) && TREE_CODE (type) != INTEGER_TYPE)
7190 error ("%<signed%> or %<unsigned%> invalid for %qs", name);
7191 else if (signed_p && unsigned_p)
7192 error ("%<signed%> and %<unsigned%> specified together for %qs", name);
7193 else if (longlong && TREE_CODE (type) != INTEGER_TYPE)
7194 error ("%<long long%> invalid for %qs", name);
7195 else if (long_p && TREE_CODE (type) == REAL_TYPE)
7196 error ("%<long%> invalid for %qs", name);
7197 else if (short_p && TREE_CODE (type) == REAL_TYPE)
7198 error ("%<short%> invalid for %qs", name);
7199 else if ((long_p || short_p) && TREE_CODE (type) != INTEGER_TYPE)
7200 error ("%<long%> or %<short%> invalid for %qs", name);
7201 else if ((long_p || short_p) && explicit_char)
7202 error ("%<long%> or %<short%> specified with char for %qs", name);
7203 else if (long_p && short_p)
7204 error ("%<long%> and %<short%> specified together for %qs", name);
7208 if (!explicit_int && !defaulted_int && !explicit_char && pedantic)
7210 pedwarn ("long, short, signed or unsigned used invalidly for %qs",
7212 if (flag_pedantic_errors)
7217 /* Discard the type modifiers if they are invalid. */
7228 /* Decide whether an integer type is signed or not.
7229 Optionally treat bitfields as signed by default. */
7233 It is implementation-defined whether a plain (neither
7234 explicitly signed or unsigned) char, short, int, or long
7235 bit-field is signed or unsigned.
7237 Naturally, we extend this to long long as well. Note that
7238 this does not include wchar_t. */
7239 || (bitfield && !flag_signed_bitfields
7241 /* A typedef for plain `int' without `signed' can be
7242 controlled just like plain `int', but a typedef for
7243 `signed int' cannot be so controlled. */
7245 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl))
7246 && TREE_CODE (type) == INTEGER_TYPE
7247 && !same_type_p (TYPE_MAIN_VARIANT (type), wchar_type_node)))
7250 type = long_long_unsigned_type_node;
7252 type = long_unsigned_type_node;
7254 type = short_unsigned_type_node;
7255 else if (type == char_type_node)
7256 type = unsigned_char_type_node;
7257 else if (typedef_decl)
7258 type = c_common_unsigned_type (type);
7260 type = unsigned_type_node;
7262 else if (signed_p && type == char_type_node)
7263 type = signed_char_type_node;
7265 type = long_long_integer_type_node;
7267 type = long_integer_type_node;
7269 type = short_integer_type_node;
7271 if (declspecs->specs[(int)ds_complex])
7273 if (TREE_CODE (type) != INTEGER_TYPE && TREE_CODE (type) != REAL_TYPE)
7274 error ("complex invalid for %qs", name);
7275 /* If we just have "complex", it is equivalent to
7276 "complex double", but if any modifiers at all are specified it is
7277 the complex form of TYPE. E.g, "complex short" is
7278 "complex short int". */
7280 else if (defaulted_int && ! longlong
7281 && ! (long_p || short_p || signed_p || unsigned_p))
7282 type = complex_double_type_node;
7283 else if (type == integer_type_node)
7284 type = complex_integer_type_node;
7285 else if (type == float_type_node)
7286 type = complex_float_type_node;
7287 else if (type == double_type_node)
7288 type = complex_double_type_node;
7289 else if (type == long_double_type_node)
7290 type = complex_long_double_type_node;
7292 type = build_complex_type (type);
7295 type_quals = TYPE_UNQUALIFIED;
7296 if (declspecs->specs[(int)ds_const])
7297 type_quals |= TYPE_QUAL_CONST;
7298 if (declspecs->specs[(int)ds_volatile])
7299 type_quals |= TYPE_QUAL_VOLATILE;
7300 if (declspecs->specs[(int)ds_restrict])
7301 type_quals |= TYPE_QUAL_RESTRICT;
7302 if (sfk == sfk_conversion && type_quals != TYPE_UNQUALIFIED)
7303 error ("qualifiers are not allowed on declaration of %<operator %T%>",
7306 if (TREE_CODE (type) == FUNCTION_TYPE
7307 && type_quals != TYPE_UNQUALIFIED)
7309 /* This was an error in C++98 (cv-qualifiers cannot be added to
7310 a function type), but DR 295 makes the code well-formed by
7311 dropping the extra qualifiers. */
7314 tree bad_type = build_qualified_type (type, type_quals);
7315 pedwarn ("ignoring %qV qualifiers added to function type %qT",
7318 type_quals = TYPE_UNQUALIFIED;
7320 type_quals |= cp_type_quals (type);
7321 type = cp_build_qualified_type_real
7322 (type, type_quals, ((typedef_decl && !DECL_ARTIFICIAL (typedef_decl)
7323 ? tf_ignore_bad_quals : 0) | tf_warning_or_error));
7324 /* We might have ignored or rejected some of the qualifiers. */
7325 type_quals = cp_type_quals (type);
7328 inlinep = !! declspecs->specs[(int)ds_inline];
7329 virtualp = !! declspecs->specs[(int)ds_virtual];
7330 explicitp = !! declspecs->specs[(int)ds_explicit];
7332 storage_class = declspecs->storage_class;
7333 if (storage_class == sc_static)
7334 staticp = 1 + (decl_context == FIELD);
7336 if (virtualp && staticp == 2)
7338 error ("member %qD cannot be declared both virtual and static", dname);
7339 storage_class = sc_none;
7342 friendp = !! declspecs->specs[(int)ds_friend];
7344 if (dependent_name && !friendp)
7346 error ("%<%T::%D%> is not a valid declarator", ctype, dependent_name);
7347 return error_mark_node;
7350 /* Issue errors about use of storage classes for parameters. */
7351 if (decl_context == PARM)
7353 if (declspecs->specs[(int)ds_typedef])
7355 error ("typedef declaration invalid in parameter declaration");
7356 return error_mark_node;
7358 else if (storage_class == sc_static
7359 || storage_class == sc_extern
7361 error ("storage class specifiers invalid in parameter declarations");
7364 /* Give error if `virtual' is used outside of class declaration. */
7366 && (current_class_name == NULL_TREE || decl_context != FIELD))
7368 error ("virtual outside class declaration");
7372 /* Static anonymous unions are dealt with here. */
7373 if (staticp && decl_context == TYPENAME
7375 && ANON_AGGR_TYPE_P (declspecs->type))
7376 decl_context = FIELD;
7378 /* Warn about storage classes that are invalid for certain
7379 kinds of declarations (parameters, typenames, etc.). */
7380 if (declspecs->conflicting_specifiers_p)
7382 error ("conflicting specifiers in declaration of %qs", name);
7383 storage_class = sc_none;
7387 && storage_class != sc_extern
7388 && storage_class != sc_static)
7389 || declspecs->specs[(int)ds_typedef]))
7391 error ("multiple storage classes in declaration of %qs", name);
7394 else if (decl_context != NORMAL
7395 && ((storage_class != sc_none
7396 && storage_class != sc_mutable)
7399 if ((decl_context == PARM || decl_context == CATCHPARM)
7400 && (storage_class == sc_register
7401 || storage_class == sc_auto))
7403 else if (declspecs->specs[(int)ds_typedef])
7405 else if (decl_context == FIELD
7406 /* C++ allows static class elements. */
7407 && storage_class == sc_static)
7408 /* C++ also allows inlines and signed and unsigned elements,
7409 but in those cases we don't come in here. */
7413 if (decl_context == FIELD)
7414 error ("storage class specified for %qs", name);
7417 if (decl_context == PARM || decl_context == CATCHPARM)
7418 error ("storage class specified for parameter %qs", name);
7420 error ("storage class specified for typename");
7422 if (storage_class == sc_register
7423 || storage_class == sc_auto
7424 || storage_class == sc_extern
7426 storage_class = sc_none;
7429 else if (storage_class == sc_extern && initialized
7432 if (toplevel_bindings_p ())
7434 /* It's common practice (and completely valid) to have a const
7435 be initialized and declared extern. */
7436 if (!(type_quals & TYPE_QUAL_CONST))
7437 warning (0, "%qs initialized and declared %<extern%>", name);
7440 error ("%qs has both %<extern%> and initializer", name);
7442 else if (storage_class == sc_extern && funcdef_flag
7443 && ! toplevel_bindings_p ())
7444 error ("nested function %qs declared %<extern%>", name);
7445 else if (toplevel_bindings_p ())
7447 if (storage_class == sc_auto)
7448 error ("top-level declaration of %qs specifies %<auto%>", name);
7451 && storage_class != sc_extern
7452 && storage_class != sc_static)
7454 error ("function-scope %qs implicitly auto and declared %<__thread%>",
7459 if (storage_class && friendp)
7460 error ("storage class specifiers invalid in friend function declarations");
7463 unqualified_id = NULL_TREE;
7466 unqualified_id = id_declarator->u.id.unqualified_name;
7467 switch (TREE_CODE (unqualified_id))
7471 = constructor_name (TREE_OPERAND (unqualified_id, 0));
7474 case IDENTIFIER_NODE:
7475 case TEMPLATE_ID_EXPR:
7483 /* Determine the type of the entity declared by recurring on the
7485 for (; declarator; declarator = declarator->declarator)
7487 const cp_declarator *inner_declarator;
7490 if (type == error_mark_node)
7491 return error_mark_node;
7493 attrs = declarator->attributes;
7499 if (declarator == NULL || declarator->kind == cdk_id)
7500 attr_flags |= (int) ATTR_FLAG_DECL_NEXT;
7501 if (declarator->kind == cdk_function)
7502 attr_flags |= (int) ATTR_FLAG_FUNCTION_NEXT;
7503 if (declarator->kind == cdk_array)
7504 attr_flags |= (int) ATTR_FLAG_ARRAY_NEXT;
7505 returned_attrs = decl_attributes (&type,
7506 chainon (returned_attrs, attrs),
7510 if (declarator->kind == cdk_id)
7513 inner_declarator = declarator->declarator;
7515 switch (declarator->kind)
7518 type = create_array_type_for_decl (dname, type,
7519 declarator->u.array.bounds);
7527 /* Declaring a function type.
7528 Make sure we have a valid type for the function to return. */
7530 /* We now know that the TYPE_QUALS don't apply to the
7531 decl, but to its return type. */
7532 type_quals = TYPE_UNQUALIFIED;
7534 /* Warn about some types functions can't return. */
7536 if (TREE_CODE (type) == FUNCTION_TYPE)
7538 error ("%qs declared as function returning a function", name);
7539 type = integer_type_node;
7541 if (TREE_CODE (type) == ARRAY_TYPE)
7543 error ("%qs declared as function returning an array", name);
7544 type = integer_type_node;
7547 /* Pick up type qualifiers which should be applied to `this'. */
7548 memfn_quals = declarator->u.function.qualifiers;
7550 /* Pick up the exception specifications. */
7551 raises = declarator->u.function.exception_specification;
7553 /* Say it's a definition only for the CALL_EXPR
7554 closest to the identifier. */
7555 funcdecl_p = inner_declarator && inner_declarator->kind == cdk_id;
7557 if (ctype == NULL_TREE
7558 && decl_context == FIELD
7560 && (friendp == 0 || dname == current_class_name))
7561 ctype = current_class_type;
7563 if (ctype && (sfk == sfk_constructor
7564 || sfk == sfk_destructor))
7566 /* We are within a class's scope. If our declarator name
7567 is the same as the class name, and we are defining
7568 a function, then it is a constructor/destructor, and
7569 therefore returns a void type. */
7571 /* ISO C++ 12.4/2. A destructor may not be declared
7572 const or volatile. A destructor may not be
7575 ISO C++ 12.1. A constructor may not be declared
7576 const or volatile. A constructor may not be
7577 virtual. A constructor may not be static. */
7579 error ((flags == DTOR_FLAG)
7580 ? "destructor cannot be static member function"
7581 : "constructor cannot be static member function");
7584 error ((flags == DTOR_FLAG)
7585 ? "destructors may not be cv-qualified"
7586 : "constructors may not be cv-qualified");
7587 memfn_quals = TYPE_UNQUALIFIED;
7590 if (decl_context == FIELD
7591 && !member_function_or_else (ctype,
7594 return error_mark_node;
7596 if (flags != DTOR_FLAG)
7598 /* It's a constructor. */
7603 pedwarn ("constructors cannot be declared virtual");
7606 if (decl_context == FIELD
7607 && sfk != sfk_constructor)
7608 return error_mark_node;
7610 if (decl_context == FIELD)
7616 error ("can't initialize friend function %qs", name);
7619 /* Cannot be both friend and virtual. */
7620 error ("virtual functions cannot be friends");
7623 if (decl_context == NORMAL)
7624 error ("friend declaration not in class definition");
7625 if (current_function_decl && funcdef_flag)
7626 error ("can't define friend function %qs in a local "
7631 arg_types = grokparms (declarator->u.function.parameters,
7634 if (inner_declarator
7635 && inner_declarator->kind == cdk_id
7636 && inner_declarator->u.id.sfk == sfk_destructor
7637 && arg_types != void_list_node)
7639 error ("destructors may not have parameters");
7640 arg_types = void_list_node;
7644 type = build_function_type (type, arg_types);
7651 /* Filter out pointers-to-references and references-to-references.
7652 We can get these if a TYPE_DECL is used. */
7654 if (TREE_CODE (type) == REFERENCE_TYPE)
7656 error (declarator->kind == cdk_reference
7657 ? "cannot declare reference to %q#T"
7658 : "cannot declare pointer to %q#T", type);
7659 type = TREE_TYPE (type);
7661 else if (VOID_TYPE_P (type))
7663 if (declarator->kind == cdk_reference)
7664 error ("cannot declare reference to %q#T", type);
7665 else if (declarator->kind == cdk_ptrmem)
7666 error ("cannot declare pointer to %q#T member", type);
7669 /* We now know that the TYPE_QUALS don't apply to the decl,
7670 but to the target of the pointer. */
7671 type_quals = TYPE_UNQUALIFIED;
7673 if (declarator->kind == cdk_ptrmem
7674 && (TREE_CODE (type) == FUNCTION_TYPE || memfn_quals))
7676 memfn_quals |= cp_type_quals (type);
7677 type = build_memfn_type (type,
7678 declarator->u.pointer.class_type,
7680 memfn_quals = TYPE_UNQUALIFIED;
7683 if (declarator->kind == cdk_reference)
7685 if (!VOID_TYPE_P (type))
7686 type = build_reference_type (type);
7688 else if (TREE_CODE (type) == METHOD_TYPE)
7689 type = build_ptrmemfunc_type (build_pointer_type (type));
7690 else if (declarator->kind == cdk_ptrmem)
7692 gcc_assert (TREE_CODE (declarator->u.pointer.class_type)
7694 if (declarator->u.pointer.class_type == error_mark_node)
7695 /* We will already have complained. */
7696 type = error_mark_node;
7698 type = build_ptrmem_type (declarator->u.pointer.class_type,
7702 type = build_pointer_type (type);
7704 /* Process a list of type modifier keywords (such as
7705 const or volatile) that were given inside the `*' or `&'. */
7707 if (declarator->u.pointer.qualifiers)
7710 = cp_build_qualified_type (type,
7711 declarator->u.pointer.qualifiers);
7712 type_quals = cp_type_quals (type);
7725 if (unqualified_id && TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR
7726 && TREE_CODE (type) != FUNCTION_TYPE
7727 && TREE_CODE (type) != METHOD_TYPE)
7729 error ("template-id %qD used as a declarator",
7731 unqualified_id = dname;
7734 /* If TYPE is a FUNCTION_TYPE, but the function name was explicitly
7735 qualified with a class-name, turn it into a METHOD_TYPE, unless
7736 we know that the function is static. We take advantage of this
7737 opportunity to do other processing that pertains to entities
7738 explicitly declared to be class members. Note that if DECLARATOR
7739 is non-NULL, we know it is a cdk_id declarator; otherwise, we
7740 would not have exited the loop above. */
7742 && declarator->u.id.qualifying_scope
7743 && TYPE_P (declarator->u.id.qualifying_scope))
7747 ctype = declarator->u.id.qualifying_scope;
7748 ctype = TYPE_MAIN_VARIANT (ctype);
7750 while (t != NULL_TREE && CLASS_TYPE_P (t))
7752 /* You're supposed to have one `template <...>' for every
7753 template class, but you don't need one for a full
7754 specialization. For example:
7756 template <class T> struct S{};
7757 template <> struct S<int> { void f(); };
7758 void S<int>::f () {}
7760 is correct; there shouldn't be a `template <>' for the
7761 definition of `S<int>::f'. */
7762 if (CLASSTYPE_TEMPLATE_SPECIALIZATION (t)
7763 && !any_dependent_template_arguments_p (CLASSTYPE_TI_ARGS (t)))
7764 /* T is an explicit (not partial) specialization. All
7765 containing classes must therefore also be explicitly
7768 if ((CLASSTYPE_USE_TEMPLATE (t) || CLASSTYPE_IS_TEMPLATE (t))
7769 && PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (t)))
7770 template_count += 1;
7772 t = TYPE_MAIN_DECL (t);
7773 t = DECL_CONTEXT (t);
7776 if (ctype == current_class_type)
7779 pedwarn ("member functions are implicitly friends of their class");
7781 pedwarn ("extra qualification %<%T::%> on member %qs",
7784 else if (/* If the qualifying type is already complete, then we
7785 can skip the following checks. */
7786 !COMPLETE_TYPE_P (ctype)
7787 && (/* If the function is being defined, then
7788 qualifying type must certainly be complete. */
7790 /* A friend declaration of "T::f" is OK, even if
7791 "T" is a template parameter. But, if this
7792 function is not a friend, the qualifying type
7794 || (!friendp && !CLASS_TYPE_P (ctype))
7795 /* For a declaration, the type need not be
7796 complete, if either it is dependent (since there
7797 is no meaningful definition of complete in that
7798 case) or the qualifying class is currently being
7800 || !(dependent_type_p (ctype)
7801 || currently_open_class (ctype)))
7802 /* Check that the qualifying type is complete. */
7803 && !complete_type_or_else (ctype, NULL_TREE))
7804 return error_mark_node;
7805 else if (TREE_CODE (type) == FUNCTION_TYPE)
7807 tree sname = declarator->u.id.unqualified_name;
7809 if (current_class_type
7810 && (!friendp || funcdef_flag))
7813 ? "cannot define member function %<%T::%s%> within %<%T%>"
7814 : "cannot declare member function %<%T::%s%> within %<%T%>",
7815 ctype, name, current_class_type);
7816 return error_mark_node;
7819 if (TREE_CODE (sname) == IDENTIFIER_NODE
7820 && NEW_DELETE_OPNAME_P (sname))
7821 /* Overloaded operator new and operator delete
7822 are always static functions. */
7825 type = build_memfn_type (type, ctype, memfn_quals);
7827 else if (declspecs->specs[(int)ds_typedef]
7828 && current_class_type)
7830 error ("cannot declare member %<%T::%s%> within %qT",
7831 ctype, name, current_class_type);
7832 return error_mark_node;
7836 /* Now TYPE has the actual type. */
7841 *attrlist = chainon (returned_attrs, *attrlist);
7843 attrlist = &returned_attrs;
7846 /* Did array size calculations overflow? */
7848 if (TREE_CODE (type) == ARRAY_TYPE
7849 && COMPLETE_TYPE_P (type)
7850 && TREE_CODE (TYPE_SIZE_UNIT (type)) == INTEGER_CST
7851 && TREE_OVERFLOW (TYPE_SIZE_UNIT (type)))
7853 error ("size of array %qs is too large", name);
7854 /* If we proceed with the array type as it is, we'll eventually
7855 crash in tree_low_cst(). */
7856 type = error_mark_node;
7859 if ((decl_context == FIELD || decl_context == PARM)
7860 && !processing_template_decl
7861 && variably_modified_type_p (type, NULL_TREE))
7863 if (decl_context == FIELD)
7864 error ("data member may not have variably modified type %qT", type);
7866 error ("parameter may not have variably modified type %qT", type);
7867 type = error_mark_node;
7870 if (explicitp == 1 || (explicitp && friendp))
7872 /* [dcl.fct.spec] The explicit specifier shall only be used in
7873 declarations of constructors within a class definition. */
7874 error ("only declarations of constructors can be %<explicit%>");
7878 if (storage_class == sc_mutable)
7880 if (decl_context != FIELD || friendp)
7882 error ("non-member %qs cannot be declared %<mutable%>", name);
7883 storage_class = sc_none;
7885 else if (decl_context == TYPENAME || declspecs->specs[(int)ds_typedef])
7887 error ("non-object member %qs cannot be declared %<mutable%>", name);
7888 storage_class = sc_none;
7890 else if (TREE_CODE (type) == FUNCTION_TYPE
7891 || TREE_CODE (type) == METHOD_TYPE)
7893 error ("function %qs cannot be declared %<mutable%>", name);
7894 storage_class = sc_none;
7898 error ("static %qs cannot be declared %<mutable%>", name);
7899 storage_class = sc_none;
7901 else if (type_quals & TYPE_QUAL_CONST)
7903 error ("const %qs cannot be declared %<mutable%>", name);
7904 storage_class = sc_none;
7908 /* If this is declaring a typedef name, return a TYPE_DECL. */
7909 if (declspecs->specs[(int)ds_typedef] && decl_context != TYPENAME)
7913 /* Note that the grammar rejects storage classes
7914 in typenames, fields or parameters. */
7915 if (current_lang_name == lang_name_java)
7916 TYPE_FOR_JAVA (type) = 1;
7918 /* This declaration:
7920 typedef void f(int) const;
7922 declares a function type which is not a member of any
7923 particular class, but which is cv-qualified; for
7924 example "f S::*" declares a pointer to a const-qualified
7925 member function of S. We record the cv-qualification in the
7927 if (memfn_quals && TREE_CODE (type) == FUNCTION_TYPE)
7928 type = cp_build_qualified_type (type, memfn_quals);
7930 if (decl_context == FIELD)
7931 decl = build_lang_decl (TYPE_DECL, unqualified_id, type);
7933 decl = build_decl (TYPE_DECL, unqualified_id, type);
7934 if (id_declarator && declarator->u.id.qualifying_scope)
7935 error ("%Jtypedef name may not be a nested-name-specifier", decl);
7937 if (decl_context != FIELD)
7939 if (!current_function_decl)
7940 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
7941 else if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (current_function_decl)
7942 || (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P
7943 (current_function_decl)))
7944 /* The TYPE_DECL is "abstract" because there will be
7945 clones of this constructor/destructor, and there will
7946 be copies of this TYPE_DECL generated in those
7948 DECL_ABSTRACT (decl) = 1;
7950 else if (constructor_name_p (unqualified_id, current_class_type))
7951 pedwarn ("ISO C++ forbids nested type %qD with same name "
7952 "as enclosing class",
7955 /* If the user declares "typedef struct {...} foo" then the
7956 struct will have an anonymous name. Fill that name in now.
7957 Nothing can refer to it, so nothing needs know about the name
7959 if (type != error_mark_node
7962 && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
7963 && TYPE_ANONYMOUS_P (type)
7964 /* Don't do this if there are attributes. */
7965 && (!attrlist || !*attrlist)
7966 && cp_type_quals (type) == TYPE_UNQUALIFIED)
7968 tree oldname = TYPE_NAME (type);
7971 /* Replace the anonymous name with the real name everywhere. */
7972 for (t = TYPE_MAIN_VARIANT (type); t; t = TYPE_NEXT_VARIANT (t))
7973 if (TYPE_NAME (t) == oldname)
7974 TYPE_NAME (t) = decl;
7976 if (TYPE_LANG_SPECIFIC (type))
7977 TYPE_WAS_ANONYMOUS (type) = 1;
7979 /* If this is a typedef within a template class, the nested
7980 type is a (non-primary) template. The name for the
7981 template needs updating as well. */
7982 if (TYPE_LANG_SPECIFIC (type) && CLASSTYPE_TEMPLATE_INFO (type))
7983 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type))
7984 = TYPE_IDENTIFIER (type);
7986 /* FIXME remangle member functions; member functions of a
7987 type with external linkage have external linkage. */
7990 /* Any qualifiers on a function type typedef have already been
7992 if (memfn_quals && !ctype && TREE_CODE (type) == FUNCTION_TYPE)
7993 memfn_quals = TYPE_UNQUALIFIED;
7996 || (typedef_decl && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl)))
7997 C_TYPEDEF_EXPLICITLY_SIGNED (decl) = 1;
7999 bad_specifiers (decl, "type", virtualp,
8000 memfn_quals != TYPE_UNQUALIFIED,
8001 inlinep, friendp, raises != NULL_TREE);
8006 /* Detect the case of an array type of unspecified size
8007 which came, as such, direct from a typedef name.
8008 We must copy the type, so that the array's domain can be
8009 individually set by the object's initializer. */
8011 if (type && typedef_type
8012 && TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type)
8013 && TYPE_MAIN_VARIANT (type) == TYPE_MAIN_VARIANT (typedef_type))
8014 type = build_cplus_array_type (TREE_TYPE (type), NULL_TREE);
8016 /* Detect where we're using a typedef of function type to declare a
8017 function. PARMS will not be set, so we must create it now. */
8019 if (type == typedef_type && TREE_CODE (type) == FUNCTION_TYPE)
8021 tree decls = NULL_TREE;
8024 for (args = TYPE_ARG_TYPES (type); args; args = TREE_CHAIN (args))
8026 tree decl = cp_build_parm_decl (NULL_TREE, TREE_VALUE (args));
8028 TREE_CHAIN (decl) = decls;
8032 parms = nreverse (decls);
8034 if (decl_context != TYPENAME)
8036 /* A cv-qualifier-seq shall only be part of the function type
8037 for a non-static member function. [8.3.5/4 dcl.fct] */
8038 if (cp_type_quals (type) != TYPE_UNQUALIFIED
8039 && (current_class_type == NULL_TREE || staticp) )
8041 error ("qualified function types cannot be used to declare %s functions",
8042 (staticp? "static member" : "free"));
8043 type = TYPE_MAIN_VARIANT (type);
8046 /* The qualifiers on the function type become the qualifiers on
8047 the non-static member function. */
8048 memfn_quals |= cp_type_quals (type);
8052 /* If this is a type name (such as, in a cast or sizeof),
8053 compute the type and return it now. */
8055 if (decl_context == TYPENAME)
8057 /* Note that the grammar rejects storage classes
8058 in typenames, fields or parameters. */
8059 if (type_quals != TYPE_UNQUALIFIED)
8060 type_quals = TYPE_UNQUALIFIED;
8062 /* Special case: "friend class foo" looks like a TYPENAME context. */
8065 if (type_quals != TYPE_UNQUALIFIED)
8067 error ("type qualifiers specified for friend class declaration");
8068 type_quals = TYPE_UNQUALIFIED;
8072 error ("%<inline%> specified for friend class declaration");
8078 /* Don't allow friend declaration without a class-key. */
8079 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
8080 pedwarn ("template parameters cannot be friends");
8081 else if (TREE_CODE (type) == TYPENAME_TYPE)
8082 pedwarn ("friend declaration requires class-key, "
8083 "i.e. %<friend class %T::%D%>",
8084 TYPE_CONTEXT (type), TYPENAME_TYPE_FULLNAME (type));
8086 pedwarn ("friend declaration requires class-key, "
8087 "i.e. %<friend %#T%>",
8091 /* Only try to do this stuff if we didn't already give up. */
8092 if (type != integer_type_node)
8094 /* A friendly class? */
8095 if (current_class_type)
8096 make_friend_class (current_class_type, TYPE_MAIN_VARIANT (type),
8099 error ("trying to make class %qT a friend of global scope",
8102 type = void_type_node;
8105 else if (memfn_quals)
8107 if (ctype == NULL_TREE)
8109 if (TREE_CODE (type) != METHOD_TYPE)
8110 error ("invalid qualifiers on non-member function type");
8112 ctype = TYPE_METHOD_BASETYPE (type);
8115 type = build_memfn_type (type, ctype, memfn_quals);
8120 else if (unqualified_id == NULL_TREE && decl_context != PARM
8121 && decl_context != CATCHPARM
8122 && TREE_CODE (type) != UNION_TYPE
8125 error ("abstract declarator %qT used as declaration", type);
8126 return error_mark_node;
8129 /* Only functions may be declared using an operator-function-id. */
8131 && IDENTIFIER_OPNAME_P (unqualified_id)
8132 && TREE_CODE (type) != FUNCTION_TYPE
8133 && TREE_CODE (type) != METHOD_TYPE)
8135 error ("declaration of %qD as non-function", unqualified_id);
8136 return error_mark_node;
8139 /* We don't check parameter types here because we can emit a better
8140 error message later. */
8141 if (decl_context != PARM)
8143 type = check_var_type (unqualified_id, type);
8144 if (type == error_mark_node)
8145 return error_mark_node;
8148 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
8149 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
8151 if (decl_context == PARM || decl_context == CATCHPARM)
8153 if (ctype || in_namespace)
8154 error ("cannot use %<::%> in parameter declaration");
8156 /* A parameter declared as an array of T is really a pointer to T.
8157 One declared as a function is really a pointer to a function.
8158 One declared as a member is really a pointer to member. */
8160 if (TREE_CODE (type) == ARRAY_TYPE)
8162 /* Transfer const-ness of array into that of type pointed to. */
8163 type = build_pointer_type (TREE_TYPE (type));
8164 type_quals = TYPE_UNQUALIFIED;
8166 else if (TREE_CODE (type) == FUNCTION_TYPE)
8167 type = build_pointer_type (type);
8173 if (decl_context == PARM)
8175 decl = cp_build_parm_decl (unqualified_id, type);
8177 bad_specifiers (decl, "parameter", virtualp,
8178 memfn_quals != TYPE_UNQUALIFIED,
8179 inlinep, friendp, raises != NULL_TREE);
8181 else if (decl_context == FIELD)
8183 /* The C99 flexible array extension. */
8184 if (!staticp && TREE_CODE (type) == ARRAY_TYPE
8185 && TYPE_DOMAIN (type) == NULL_TREE)
8187 tree itype = compute_array_index_type (dname, integer_zero_node);
8188 type = build_cplus_array_type (TREE_TYPE (type), itype);
8191 if (type == error_mark_node)
8193 /* Happens when declaring arrays of sizes which
8194 are error_mark_node, for example. */
8197 else if (in_namespace && !friendp)
8199 /* Something like struct S { int N::j; }; */
8200 error ("invalid use of %<::%>");
8201 return error_mark_node;
8203 else if (TREE_CODE (type) == FUNCTION_TYPE)
8206 tree function_context;
8210 if (ctype == NULL_TREE)
8211 ctype = current_class_type;
8213 if (ctype == NULL_TREE)
8215 error ("can't make %qD into a method -- not in a class",
8217 return error_mark_node;
8220 /* ``A union may [ ... ] not [ have ] virtual functions.''
8222 if (virtualp && TREE_CODE (ctype) == UNION_TYPE)
8224 error ("function %qD declared virtual inside a union",
8226 return error_mark_node;
8229 if (NEW_DELETE_OPNAME_P (unqualified_id))
8233 error ("%qD cannot be declared virtual, since it "
8239 else if (staticp < 2)
8240 type = build_memfn_type (type, ctype, memfn_quals);
8243 /* Check that the name used for a destructor makes sense. */
8244 if (sfk == sfk_destructor)
8248 gcc_assert (friendp);
8249 error ("expected qualified name in friend declaration "
8250 "for destructor %qD",
8251 id_declarator->u.id.unqualified_name);
8252 return error_mark_node;
8255 if (!same_type_p (TREE_OPERAND
8256 (id_declarator->u.id.unqualified_name, 0),
8259 error ("declaration of %qD as member of %qT",
8260 id_declarator->u.id.unqualified_name, ctype);
8261 return error_mark_node;
8265 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
8266 function_context = (ctype != NULL_TREE) ?
8267 decl_function_context (TYPE_MAIN_DECL (ctype)) : NULL_TREE;
8268 publicp = (! friendp || ! staticp)
8269 && function_context == NULL_TREE;
8270 decl = grokfndecl (ctype, type,
8271 TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
8272 ? unqualified_id : dname,
8275 virtualp, flags, memfn_quals, raises,
8276 friendp ? -1 : 0, friendp, publicp, inlinep,
8278 funcdef_flag, template_count, in_namespace, attrlist);
8279 if (decl == NULL_TREE)
8280 return error_mark_node;
8282 /* This clobbers the attrs stored in `decl' from `attrlist'. */
8283 /* The decl and setting of decl_attr is also turned off. */
8284 decl = build_decl_attribute_variant (decl, decl_attr);
8287 /* [class.conv.ctor]
8289 A constructor declared without the function-specifier
8290 explicit that can be called with a single parameter
8291 specifies a conversion from the type of its first
8292 parameter to the type of its class. Such a constructor
8293 is called a converting constructor. */
8295 DECL_NONCONVERTING_P (decl) = 1;
8296 else if (DECL_CONSTRUCTOR_P (decl))
8298 /* The constructor can be called with exactly one
8299 parameter if there is at least one parameter, and
8300 any subsequent parameters have default arguments.
8301 Ignore any compiler-added parms. */
8302 tree arg_types = FUNCTION_FIRST_USER_PARMTYPE (decl);
8304 if (arg_types == void_list_node
8306 && TREE_CHAIN (arg_types)
8307 && TREE_CHAIN (arg_types) != void_list_node
8308 && !TREE_PURPOSE (TREE_CHAIN (arg_types))))
8309 DECL_NONCONVERTING_P (decl) = 1;
8312 else if (TREE_CODE (type) == METHOD_TYPE)
8314 /* We only get here for friend declarations of
8315 members of other classes. */
8316 /* All method decls are public, so tell grokfndecl to set
8317 TREE_PUBLIC, also. */
8318 decl = grokfndecl (ctype, type,
8319 TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
8320 ? unqualified_id : dname,
8323 virtualp, flags, memfn_quals, raises,
8324 friendp ? -1 : 0, friendp, 1, 0, sfk,
8325 funcdef_flag, template_count, in_namespace,
8327 if (decl == NULL_TREE)
8328 return error_mark_node;
8330 else if (!staticp && !dependent_type_p (type)
8331 && !COMPLETE_TYPE_P (complete_type (type))
8332 && (TREE_CODE (type) != ARRAY_TYPE || initialized == 0))
8335 error ("field %qD has incomplete type", unqualified_id);
8337 error ("name %qT has incomplete type", type);
8339 /* If we're instantiating a template, tell them which
8340 instantiation made the field's type be incomplete. */
8341 if (current_class_type
8342 && TYPE_NAME (current_class_type)
8343 && IDENTIFIER_TEMPLATE (TYPE_IDENTIFIER (current_class_type))
8345 && declspecs->type == type)
8346 error (" in instantiation of template %qT",
8347 current_class_type);
8349 return error_mark_node;
8355 error ("%qE is neither function nor member function; "
8356 "cannot be declared friend", unqualified_id);
8364 /* Friends are treated specially. */
8365 if (ctype == current_class_type)
8366 ; /* We already issued a pedwarn. */
8367 else if (decl && DECL_NAME (decl))
8369 if (template_class_depth (current_class_type) == 0)
8371 decl = check_explicit_specialization
8372 (unqualified_id, decl, template_count,
8373 2 * funcdef_flag + 4);
8374 if (decl == error_mark_node)
8375 return error_mark_node;
8378 decl = do_friend (ctype, unqualified_id, decl,
8384 return error_mark_node;
8387 /* Structure field. It may not be a function, except for C++. */
8389 if (decl == NULL_TREE)
8395 /* An attempt is being made to initialize a non-static
8396 member. But, from [class.mem]:
8398 4 A member-declarator can contain a
8399 constant-initializer only if it declares a static
8400 member (_class.static_) of integral or enumeration
8401 type, see _class.static.data_.
8403 This used to be relatively common practice, but
8404 the rest of the compiler does not correctly
8405 handle the initialization unless the member is
8406 static so we make it static below. */
8407 pedwarn ("ISO C++ forbids initialization of member %qD",
8409 pedwarn ("making %qD static", unqualified_id);
8413 if (uses_template_parms (type))
8414 /* We'll check at instantiation time. */
8416 else if (check_static_variable_definition (unqualified_id,
8418 /* If we just return the declaration, crashes
8419 will sometimes occur. We therefore return
8420 void_type_node, as if this was a friend
8421 declaration, to cause callers to completely
8422 ignore this declaration. */
8423 return error_mark_node;
8428 /* C++ allows static class members. All other work
8429 for this is done by grokfield. */
8430 decl = build_lang_decl (VAR_DECL, unqualified_id, type);
8431 set_linkage_for_static_data_member (decl);
8432 /* Even if there is an in-class initialization, DECL
8433 is considered undefined until an out-of-class
8434 definition is provided. */
8435 DECL_EXTERNAL (decl) = 1;
8439 if (targetm.have_tls)
8440 DECL_TLS_MODEL (decl) = decl_default_tls_model (decl);
8442 /* A mere warning is sure to result in improper
8443 semantics at runtime. Don't bother to allow this to
8445 error ("thread-local storage not supported for this target");
8450 decl = build_decl (FIELD_DECL, unqualified_id, type);
8451 DECL_NONADDRESSABLE_P (decl) = bitfield;
8452 if (storage_class == sc_mutable)
8454 DECL_MUTABLE_P (decl) = 1;
8455 storage_class = sc_none;
8459 bad_specifiers (decl, "field", virtualp,
8460 memfn_quals != TYPE_UNQUALIFIED,
8461 inlinep, friendp, raises != NULL_TREE);
8464 else if (TREE_CODE (type) == FUNCTION_TYPE
8465 || TREE_CODE (type) == METHOD_TYPE)
8470 if (!unqualified_id)
8471 return error_mark_node;
8473 if (TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR)
8474 original_name = dname;
8476 original_name = unqualified_id;
8478 if (storage_class == sc_auto)
8479 error ("storage class %<auto%> invalid for function %qs", name);
8480 else if (storage_class == sc_register)
8481 error ("storage class %<register%> invalid for function %qs", name);
8483 error ("storage class %<__thread%> invalid for function %qs", name);
8485 /* Function declaration not at top level.
8486 Storage classes other than `extern' are not allowed
8487 and `extern' makes no difference. */
8488 if (! toplevel_bindings_p ()
8489 && (storage_class == sc_static
8490 || declspecs->specs[(int)ds_inline])
8493 if (storage_class == sc_static)
8494 pedwarn ("%<static%> specified invalid for function %qs "
8495 "declared out of global scope", name);
8497 pedwarn ("%<inline%> specifier invalid for function %qs "
8498 "declared out of global scope", name);
8501 if (ctype == NULL_TREE)
8505 error ("virtual non-class function %qs", name);
8509 else if (TREE_CODE (type) == FUNCTION_TYPE && staticp < 2
8510 && !NEW_DELETE_OPNAME_P (original_name))
8511 type = build_method_type_directly (ctype,
8513 TYPE_ARG_TYPES (type));
8515 /* Record presence of `static'. */
8516 publicp = (ctype != NULL_TREE
8517 || storage_class == sc_extern
8518 || storage_class != sc_static);
8520 decl = grokfndecl (ctype, type, original_name, parms, unqualified_id,
8521 virtualp, flags, memfn_quals, raises,
8523 publicp, inlinep, sfk, funcdef_flag,
8524 template_count, in_namespace, attrlist);
8525 if (decl == NULL_TREE)
8526 return error_mark_node;
8530 int invalid_static = 0;
8532 /* Don't allow a static member function in a class, and forbid
8533 declaring main to be static. */
8534 if (TREE_CODE (type) == METHOD_TYPE)
8536 pedwarn ("cannot declare member function %qD to have "
8537 "static linkage", decl);
8540 else if (current_function_decl)
8542 /* FIXME need arm citation */
8543 error ("cannot declare static function inside another function");
8550 storage_class = sc_none;
8556 /* It's a variable. */
8558 /* An uninitialized decl with `extern' is a reference. */
8559 decl = grokvardecl (type, unqualified_id,
8562 (type_quals & TYPE_QUAL_CONST) != 0,
8563 ctype ? ctype : in_namespace);
8564 bad_specifiers (decl, "variable", virtualp,
8565 memfn_quals != TYPE_UNQUALIFIED,
8566 inlinep, friendp, raises != NULL_TREE);
8570 DECL_CONTEXT (decl) = ctype;
8573 pedwarn ("%<static%> may not be used when defining "
8574 "(as opposed to declaring) a static data member");
8576 storage_class = sc_none;
8578 if (storage_class == sc_register && TREE_STATIC (decl))
8580 error ("static member %qD declared %<register%>", decl);
8581 storage_class = sc_none;
8583 if (storage_class == sc_extern && pedantic)
8585 pedwarn ("cannot explicitly declare member %q#D to have "
8588 storage_class = sc_none;
8593 /* Record `register' declaration for warnings on &
8594 and in case doing stupid register allocation. */
8596 if (storage_class == sc_register)
8597 DECL_REGISTER (decl) = 1;
8598 else if (storage_class == sc_extern)
8599 DECL_THIS_EXTERN (decl) = 1;
8600 else if (storage_class == sc_static)
8601 DECL_THIS_STATIC (decl) = 1;
8603 /* Record constancy and volatility. There's no need to do this
8604 when processing a template; we'll do this for the instantiated
8605 declaration based on the type of DECL. */
8606 if (!processing_template_decl)
8607 cp_apply_type_quals_to_decl (type_quals, decl);
8613 /* Subroutine of start_function. Ensure that each of the parameter
8614 types (as listed in PARMS) is complete, as is required for a
8615 function definition. */
8618 require_complete_types_for_parms (tree parms)
8620 for (; parms; parms = TREE_CHAIN (parms))
8622 if (dependent_type_p (TREE_TYPE (parms)))
8624 if (!VOID_TYPE_P (TREE_TYPE (parms))
8625 && complete_type_or_else (TREE_TYPE (parms), parms))
8627 relayout_decl (parms);
8628 DECL_ARG_TYPE (parms) = type_passed_as (TREE_TYPE (parms));
8631 /* grokparms or complete_type_or_else will have already issued
8633 TREE_TYPE (parms) = error_mark_node;
8637 /* Returns nonzero if T is a local variable. */
8640 local_variable_p (tree t)
8642 if ((TREE_CODE (t) == VAR_DECL
8643 /* A VAR_DECL with a context that is a _TYPE is a static data
8645 && !TYPE_P (CP_DECL_CONTEXT (t))
8646 /* Any other non-local variable must be at namespace scope. */
8647 && !DECL_NAMESPACE_SCOPE_P (t))
8648 || (TREE_CODE (t) == PARM_DECL))
8654 /* Returns nonzero if T is an automatic local variable or a label.
8655 (These are the declarations that need to be remapped when the code
8656 containing them is duplicated.) */
8659 nonstatic_local_decl_p (tree t)
8661 return ((local_variable_p (t) && !TREE_STATIC (t))
8662 || TREE_CODE (t) == LABEL_DECL
8663 || TREE_CODE (t) == RESULT_DECL);
8666 /* Like local_variable_p, but suitable for use as a tree-walking
8670 local_variable_p_walkfn (tree *tp, int *walk_subtrees,
8671 void *data ATTRIBUTE_UNUSED)
8673 if (local_variable_p (*tp) && !DECL_ARTIFICIAL (*tp))
8675 else if (TYPE_P (*tp))
8682 /* Check that ARG, which is a default-argument expression for a
8683 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
8684 something goes wrong. DECL may also be a _TYPE node, rather than a
8685 DECL, if there is no DECL available. */
8688 check_default_argument (tree decl, tree arg)
8693 if (TREE_CODE (arg) == DEFAULT_ARG)
8694 /* We get a DEFAULT_ARG when looking at an in-class declaration
8695 with a default argument. Ignore the argument for now; we'll
8696 deal with it after the class is complete. */
8705 decl_type = TREE_TYPE (decl);
8707 if (arg == error_mark_node
8708 || decl == error_mark_node
8709 || TREE_TYPE (arg) == error_mark_node
8710 || decl_type == error_mark_node)
8711 /* Something already went wrong. There's no need to check
8713 return error_mark_node;
8715 /* [dcl.fct.default]
8717 A default argument expression is implicitly converted to the
8719 if (!TREE_TYPE (arg)
8720 || !can_convert_arg (decl_type, TREE_TYPE (arg), arg, LOOKUP_NORMAL))
8723 error ("default argument for %q#D has type %qT",
8724 decl, TREE_TYPE (arg));
8726 error ("default argument for parameter of type %qT has type %qT",
8727 decl_type, TREE_TYPE (arg));
8729 return error_mark_node;
8732 /* [dcl.fct.default]
8734 Local variables shall not be used in default argument
8737 The keyword `this' shall not be used in a default argument of a
8739 var = walk_tree_without_duplicates (&arg, local_variable_p_walkfn,
8743 error ("default argument %qE uses local variable %qD", arg, var);
8744 return error_mark_node;
8751 /* Decode the list of parameter types for a function type.
8752 Given the list of things declared inside the parens,
8753 return a list of types.
8755 If this parameter does not end with an ellipsis, we append
8758 *PARMS is set to the chain of PARM_DECLs created. */
8761 grokparms (cp_parameter_declarator *first_parm, tree *parms)
8763 tree result = NULL_TREE;
8764 tree decls = NULL_TREE;
8765 int ellipsis = !first_parm || first_parm->ellipsis_p;
8766 cp_parameter_declarator *parm;
8769 for (parm = first_parm; parm != NULL; parm = parm->next)
8771 tree type = NULL_TREE;
8772 tree init = parm->default_argument;
8776 if (parm == no_parameters)
8779 attrs = parm->decl_specifiers.attributes;
8780 parm->decl_specifiers.attributes = NULL_TREE;
8781 decl = grokdeclarator (parm->declarator, &parm->decl_specifiers,
8782 PARM, init != NULL_TREE, &attrs);
8783 if (! decl || TREE_TYPE (decl) == error_mark_node)
8787 cplus_decl_attributes (&decl, attrs, 0);
8789 type = TREE_TYPE (decl);
8790 if (VOID_TYPE_P (type))
8792 if (same_type_p (type, void_type_node)
8793 && DECL_SELF_REFERENCE_P (type)
8794 && !DECL_NAME (decl) && !result && !parm->next && !ellipsis)
8795 /* this is a parmlist of `(void)', which is ok. */
8797 cxx_incomplete_type_error (decl, type);
8798 /* It's not a good idea to actually create parameters of
8799 type `void'; other parts of the compiler assume that a
8800 void type terminates the parameter list. */
8801 type = error_mark_node;
8802 TREE_TYPE (decl) = error_mark_node;
8805 if (type != error_mark_node)
8807 /* Top-level qualifiers on the parameters are
8808 ignored for function types. */
8809 type = cp_build_qualified_type (type, 0);
8810 if (TREE_CODE (type) == METHOD_TYPE)
8812 error ("parameter %qD invalidly declared method type", decl);
8813 type = build_pointer_type (type);
8814 TREE_TYPE (decl) = type;
8816 else if (abstract_virtuals_error (decl, type))
8817 any_error = 1; /* Seems like a good idea. */
8818 else if (POINTER_TYPE_P (type))
8820 /* [dcl.fct]/6, parameter types cannot contain pointers
8821 (references) to arrays of unknown bound. */
8822 tree t = TREE_TYPE (type);
8823 int ptr = TYPE_PTR_P (type);
8829 else if (TREE_CODE (t) != ARRAY_TYPE)
8831 else if (!TYPE_DOMAIN (t))
8835 if (TREE_CODE (t) == ARRAY_TYPE)
8836 error ("parameter %qD includes %s to array of unknown "
8838 decl, ptr ? "pointer" : "reference", t);
8843 else if (init && !processing_template_decl)
8844 init = check_default_argument (decl, init);
8847 TREE_CHAIN (decl) = decls;
8849 result = tree_cons (init, type, result);
8851 decls = nreverse (decls);
8852 result = nreverse (result);
8854 result = chainon (result, void_list_node);
8861 /* D is a constructor or overloaded `operator='.
8863 Let T be the class in which D is declared. Then, this function
8866 -1 if D's is an ill-formed constructor or copy assignment operator
8867 whose first parameter is of type `T'.
8868 0 if D is not a copy constructor or copy assignment
8870 1 if D is a copy constructor or copy assignment operator whose
8871 first parameter is a reference to const qualified T.
8872 2 if D is a copy constructor or copy assignment operator whose
8873 first parameter is a reference to non-const qualified T.
8875 This function can be used as a predicate. Positive values indicate
8876 a copy constructor and nonzero values indicate a copy assignment
8886 gcc_assert (DECL_FUNCTION_MEMBER_P (d));
8888 if (TREE_CODE (d) == TEMPLATE_DECL
8889 || (DECL_TEMPLATE_INFO (d)
8890 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d))))
8891 /* Instantiations of template member functions are never copy
8892 functions. Note that member functions of templated classes are
8893 represented as template functions internally, and we must
8894 accept those as copy functions. */
8897 args = FUNCTION_FIRST_USER_PARMTYPE (d);
8901 arg_type = TREE_VALUE (args);
8902 if (arg_type == error_mark_node)
8905 if (TYPE_MAIN_VARIANT (arg_type) == DECL_CONTEXT (d))
8907 /* Pass by value copy assignment operator. */
8910 else if (TREE_CODE (arg_type) == REFERENCE_TYPE
8911 && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type)) == DECL_CONTEXT (d))
8913 if (CP_TYPE_CONST_P (TREE_TYPE (arg_type)))
8919 args = TREE_CHAIN (args);
8921 if (args && args != void_list_node && !TREE_PURPOSE (args))
8922 /* There are more non-optional args. */
8928 /* Remember any special properties of member function DECL. */
8930 void grok_special_member_properties (tree decl)
8934 if (!DECL_NONSTATIC_MEMBER_FUNCTION_P (decl))
8937 class_type = DECL_CONTEXT (decl);
8938 if (DECL_CONSTRUCTOR_P (decl))
8940 int ctor = copy_fn_p (decl);
8942 TYPE_HAS_CONSTRUCTOR (class_type) = 1;
8948 A non-template constructor for class X is a copy
8949 constructor if its first parameter is of type X&, const
8950 X&, volatile X& or const volatile X&, and either there
8951 are no other parameters or else all other parameters have
8952 default arguments. */
8953 TYPE_HAS_INIT_REF (class_type) = 1;
8955 TYPE_HAS_CONST_INIT_REF (class_type) = 1;
8957 else if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl)))
8958 TYPE_HAS_DEFAULT_CONSTRUCTOR (class_type) = 1;
8960 else if (DECL_OVERLOADED_OPERATOR_P (decl) == NOP_EXPR)
8964 A non-template assignment operator for class X is a copy
8965 assignment operator if its parameter is of type X, X&, const
8966 X&, volatile X& or const volatile X&. */
8968 int assop = copy_fn_p (decl);
8972 TYPE_HAS_ASSIGN_REF (class_type) = 1;
8974 TYPE_HAS_CONST_ASSIGN_REF (class_type) = 1;
8979 /* Check a constructor DECL has the correct form. Complains
8980 if the class has a constructor of the form X(X). */
8983 grok_ctor_properties (tree ctype, tree decl)
8985 int ctor_parm = copy_fn_p (decl);
8991 A declaration of a constructor for a class X is ill-formed if
8992 its first parameter is of type (optionally cv-qualified) X
8993 and either there are no other parameters or else all other
8994 parameters have default arguments.
8996 We *don't* complain about member template instantiations that
8997 have this form, though; they can occur as we try to decide
8998 what constructor to use during overload resolution. Since
8999 overload resolution will never prefer such a constructor to
9000 the non-template copy constructor (which is either explicitly
9001 or implicitly defined), there's no need to worry about their
9002 existence. Theoretically, they should never even be
9003 instantiated, but that's hard to forestall. */
9004 error ("invalid constructor; you probably meant %<%T (const %T&)%>",
9012 /* An operator with this code is unary, but can also be binary. */
9015 ambi_op_p (enum tree_code code)
9017 return (code == INDIRECT_REF
9018 || code == ADDR_EXPR
9019 || code == UNARY_PLUS_EXPR
9020 || code == NEGATE_EXPR
9021 || code == PREINCREMENT_EXPR
9022 || code == PREDECREMENT_EXPR);
9025 /* An operator with this name can only be unary. */
9028 unary_op_p (enum tree_code code)
9030 return (code == TRUTH_NOT_EXPR
9031 || code == BIT_NOT_EXPR
9032 || code == COMPONENT_REF
9033 || code == TYPE_EXPR);
9036 /* DECL is a declaration for an overloaded operator. If COMPLAIN is true,
9037 errors are issued for invalid declarations. */
9040 grok_op_properties (tree decl, bool complain)
9042 tree argtypes = TYPE_ARG_TYPES (TREE_TYPE (decl));
9044 int methodp = (TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE);
9045 tree name = DECL_NAME (decl);
9046 enum tree_code operator_code;
9051 /* Count the number of arguments and check for ellipsis. */
9052 for (argtype = argtypes, arity = 0;
9053 argtype && argtype != void_list_node;
9054 argtype = TREE_CHAIN (argtype))
9056 ellipsis_p = !argtype;
9058 class_type = DECL_CONTEXT (decl);
9059 if (class_type && !CLASS_TYPE_P (class_type))
9060 class_type = NULL_TREE;
9062 if (DECL_CONV_FN_P (decl))
9063 operator_code = TYPE_EXPR;
9067 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
9068 if (ansi_opname (CODE) == name) \
9070 operator_code = (CODE); \
9073 else if (ansi_assopname (CODE) == name) \
9075 operator_code = (CODE); \
9076 DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
9080 #include "operators.def"
9086 gcc_assert (operator_code != LAST_CPLUS_TREE_CODE);
9087 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
9090 switch (operator_code)
9093 TYPE_HAS_NEW_OPERATOR (class_type) = 1;
9097 TYPE_GETS_DELETE (class_type) |= 1;
9101 TYPE_HAS_ARRAY_NEW_OPERATOR (class_type) = 1;
9104 case VEC_DELETE_EXPR:
9105 TYPE_GETS_DELETE (class_type) |= 2;
9112 /* [basic.std.dynamic.allocation]/1:
9114 A program is ill-formed if an allocation function is declared
9115 in a namespace scope other than global scope or declared static
9118 The same also holds true for deallocation functions. */
9119 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR
9120 || operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
9122 if (DECL_NAMESPACE_SCOPE_P (decl))
9124 if (CP_DECL_CONTEXT (decl) != global_namespace)
9126 error ("%qD may not be declared within a namespace", decl);
9129 else if (!TREE_PUBLIC (decl))
9131 error ("%qD may not be declared as static", decl);
9137 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR)
9138 TREE_TYPE (decl) = coerce_new_type (TREE_TYPE (decl));
9139 else if (operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
9140 TREE_TYPE (decl) = coerce_delete_type (TREE_TYPE (decl));
9143 /* An operator function must either be a non-static member function
9144 or have at least one parameter of a class, a reference to a class,
9145 an enumeration, or a reference to an enumeration. 13.4.0.6 */
9146 if (! methodp || DECL_STATIC_FUNCTION_P (decl))
9148 if (operator_code == TYPE_EXPR
9149 || operator_code == CALL_EXPR
9150 || operator_code == COMPONENT_REF
9151 || operator_code == ARRAY_REF
9152 || operator_code == NOP_EXPR)
9154 error ("%qD must be a nonstatic member function", decl);
9161 if (DECL_STATIC_FUNCTION_P (decl))
9163 error ("%qD must be either a non-static member "
9164 "function or a non-member function", decl);
9168 for (p = argtypes; p && p != void_list_node; p = TREE_CHAIN (p))
9170 tree arg = non_reference (TREE_VALUE (p));
9171 if (arg == error_mark_node)
9174 /* IS_AGGR_TYPE, rather than CLASS_TYPE_P, is used
9175 because these checks are performed even on
9176 template functions. */
9177 if (IS_AGGR_TYPE (arg) || TREE_CODE (arg) == ENUMERAL_TYPE)
9181 if (!p || p == void_list_node)
9184 error ("%qD must have an argument of class or "
9185 "enumerated type", decl);
9191 /* There are no restrictions on the arguments to an overloaded
9193 if (operator_code == CALL_EXPR)
9196 /* Warn about conversion operators that will never be used. */
9197 if (IDENTIFIER_TYPENAME_P (name)
9198 && ! DECL_TEMPLATE_INFO (decl)
9200 /* Warn only declaring the function; there is no need to
9201 warn again about out-of-class definitions. */
9202 && class_type == current_class_type)
9204 tree t = TREE_TYPE (name);
9205 int ref = (TREE_CODE (t) == REFERENCE_TYPE);
9206 const char *what = 0;
9209 t = TYPE_MAIN_VARIANT (TREE_TYPE (t));
9211 if (TREE_CODE (t) == VOID_TYPE)
9213 else if (class_type)
9215 if (t == class_type)
9216 what = "the same type";
9217 /* Don't force t to be complete here. */
9218 else if (IS_AGGR_TYPE (t)
9219 && COMPLETE_TYPE_P (t)
9220 && DERIVED_FROM_P (t, class_type))
9221 what = "a base class";
9225 warning (OPT_Wconversion, "conversion to %s%s will never use a type "
9226 "conversion operator",
9227 ref ? "a reference to " : "", what);
9230 if (operator_code == COND_EXPR)
9233 error ("ISO C++ prohibits overloading operator ?:");
9236 else if (ellipsis_p)
9238 error ("%qD must not have variable number of arguments", decl);
9241 else if (ambi_op_p (operator_code))
9244 /* We pick the one-argument operator codes by default, so
9245 we don't have to change anything. */
9247 else if (arity == 2)
9249 /* If we thought this was a unary operator, we now know
9250 it to be a binary operator. */
9251 switch (operator_code)
9254 operator_code = MULT_EXPR;
9258 operator_code = BIT_AND_EXPR;
9261 case UNARY_PLUS_EXPR:
9262 operator_code = PLUS_EXPR;
9266 operator_code = MINUS_EXPR;
9269 case PREINCREMENT_EXPR:
9270 operator_code = POSTINCREMENT_EXPR;
9273 case PREDECREMENT_EXPR:
9274 operator_code = POSTDECREMENT_EXPR;
9281 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
9283 if ((operator_code == POSTINCREMENT_EXPR
9284 || operator_code == POSTDECREMENT_EXPR)
9285 && ! processing_template_decl
9286 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes)), integer_type_node))
9289 error ("postfix %qD must take %<int%> as its argument",
9292 error ("postfix %qD must take %<int%> as its second "
9300 error ("%qD must take either zero or one argument", decl);
9302 error ("%qD must take either one or two arguments", decl);
9306 /* More Effective C++ rule 6. */
9308 && (operator_code == POSTINCREMENT_EXPR
9309 || operator_code == POSTDECREMENT_EXPR
9310 || operator_code == PREINCREMENT_EXPR
9311 || operator_code == PREDECREMENT_EXPR))
9313 tree arg = TREE_VALUE (argtypes);
9314 tree ret = TREE_TYPE (TREE_TYPE (decl));
9315 if (methodp || TREE_CODE (arg) == REFERENCE_TYPE)
9316 arg = TREE_TYPE (arg);
9317 arg = TYPE_MAIN_VARIANT (arg);
9318 if (operator_code == PREINCREMENT_EXPR
9319 || operator_code == PREDECREMENT_EXPR)
9321 if (TREE_CODE (ret) != REFERENCE_TYPE
9322 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret)),
9324 warning (OPT_Weffc__, "prefix %qD should return %qT", decl,
9325 build_reference_type (arg));
9329 if (!same_type_p (TYPE_MAIN_VARIANT (ret), arg))
9330 warning (OPT_Weffc__, "postfix %qD should return %qT", decl, arg);
9334 else if (unary_op_p (operator_code))
9339 error ("%qD must take %<void%>", decl);
9341 error ("%qD must take exactly one argument", decl);
9345 else /* if (binary_op_p (operator_code)) */
9350 error ("%qD must take exactly one argument", decl);
9352 error ("%qD must take exactly two arguments", decl);
9356 /* More Effective C++ rule 7. */
9358 && (operator_code == TRUTH_ANDIF_EXPR
9359 || operator_code == TRUTH_ORIF_EXPR
9360 || operator_code == COMPOUND_EXPR))
9361 warning (OPT_Weffc__, "user-defined %qD always evaluates both arguments",
9365 /* Effective C++ rule 23. */
9368 && !DECL_ASSIGNMENT_OPERATOR_P (decl)
9369 && (operator_code == PLUS_EXPR
9370 || operator_code == MINUS_EXPR
9371 || operator_code == TRUNC_DIV_EXPR
9372 || operator_code == MULT_EXPR
9373 || operator_code == TRUNC_MOD_EXPR)
9374 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl))) == REFERENCE_TYPE)
9375 warning (OPT_Weffc__, "%qD should return by value", decl);
9378 for (; argtypes && argtypes != void_list_node;
9379 argtypes = TREE_CHAIN (argtypes))
9380 if (TREE_PURPOSE (argtypes))
9382 TREE_PURPOSE (argtypes) = NULL_TREE;
9383 if (operator_code == POSTINCREMENT_EXPR
9384 || operator_code == POSTDECREMENT_EXPR)
9387 pedwarn ("%qD cannot have default arguments", decl);
9391 error ("%qD cannot have default arguments", decl);
9399 /* Return a string giving the keyword associate with CODE. */
9402 tag_name (enum tag_types code)
9421 /* Name lookup in an elaborated-type-specifier (after the keyword
9422 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
9423 elaborated-type-specifier is invalid, issue a diagnostic and return
9424 error_mark_node; otherwise, return the *_TYPE to which it referred.
9425 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
9428 check_elaborated_type_specifier (enum tag_types tag_code,
9430 bool allow_template_p)
9436 struct S { struct S *p; };
9438 name lookup will find the TYPE_DECL for the implicit "S::S"
9439 typedef. Adjust for that here. */
9440 if (DECL_SELF_REFERENCE_P (decl))
9441 decl = TYPE_NAME (TREE_TYPE (decl));
9443 type = TREE_TYPE (decl);
9445 /* Check TEMPLATE_TYPE_PARM first because DECL_IMPLICIT_TYPEDEF_P
9446 is false for this case as well. */
9447 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
9449 error ("using template type parameter %qT after %qs",
9450 type, tag_name (tag_code));
9451 return error_mark_node;
9455 If the identifier resolves to a typedef-name or a template
9456 type-parameter, the elaborated-type-specifier is ill-formed.
9458 In other words, the only legitimate declaration to use in the
9459 elaborated type specifier is the implicit typedef created when
9460 the type is declared. */
9461 else if (!DECL_IMPLICIT_TYPEDEF_P (decl)
9462 && tag_code != typename_type)
9464 error ("using typedef-name %qD after %qs", decl, tag_name (tag_code));
9465 error ("%q+D has a previous declaration here", decl);
9466 return error_mark_node;
9468 else if (TREE_CODE (type) != RECORD_TYPE
9469 && TREE_CODE (type) != UNION_TYPE
9470 && tag_code != enum_type
9471 && tag_code != typename_type)
9473 error ("%qT referred to as %qs", type, tag_name (tag_code));
9474 error ("%q+T has a previous declaration here", type);
9475 return error_mark_node;
9477 else if (TREE_CODE (type) != ENUMERAL_TYPE
9478 && tag_code == enum_type)
9480 error ("%qT referred to as enum", type);
9481 error ("%q+T has a previous declaration here", type);
9482 return error_mark_node;
9484 else if (!allow_template_p
9485 && TREE_CODE (type) == RECORD_TYPE
9486 && CLASSTYPE_IS_TEMPLATE (type))
9488 /* If a class template appears as elaborated type specifier
9489 without a template header such as:
9491 template <class T> class C {};
9492 void f(class C); // No template header here
9494 then the required template argument is missing. */
9495 error ("template argument required for %<%s %T%>",
9496 tag_name (tag_code),
9497 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type)));
9498 return error_mark_node;
9504 /* Lookup NAME in elaborate type specifier in scope according to
9505 SCOPE and issue diagnostics if necessary.
9506 Return *_TYPE node upon success, NULL_TREE when the NAME is not
9507 found, and ERROR_MARK_NODE for type error. */
9510 lookup_and_check_tag (enum tag_types tag_code, tree name,
9511 tag_scope scope, bool template_header_p)
9515 if (scope == ts_global)
9517 /* First try ordinary name lookup, ignoring hidden class name
9518 injected via friend declaration. */
9519 decl = lookup_name_prefer_type (name, 2);
9520 /* If that fails, the name will be placed in the smallest
9521 non-class, non-function-prototype scope according to 3.3.1/5.
9522 We may already have a hidden name declared as friend in this
9523 scope. So lookup again but not ignoring hidden names.
9524 If we find one, that name will be made visible rather than
9525 creating a new tag. */
9527 decl = lookup_type_scope (name, ts_within_enclosing_non_class);
9530 decl = lookup_type_scope (name, scope);
9532 if (decl && DECL_CLASS_TEMPLATE_P (decl))
9533 decl = DECL_TEMPLATE_RESULT (decl);
9535 if (decl && TREE_CODE (decl) == TYPE_DECL)
9537 /* Look for invalid nested type:
9541 if (scope == ts_current && DECL_SELF_REFERENCE_P (decl))
9543 error ("%qD has the same name as the class in which it is "
9546 return error_mark_node;
9549 /* Two cases we need to consider when deciding if a class
9550 template is allowed as an elaborated type specifier:
9551 1. It is a self reference to its own class.
9552 2. It comes with a template header.
9556 template <class T> class C {
9557 class C *c1; // DECL_SELF_REFERENCE_P is true
9560 template <class U> class C; // template_header_p is true
9561 template <class T> class C<T>::D {
9562 class C *c2; // DECL_SELF_REFERENCE_P is true
9565 t = check_elaborated_type_specifier (tag_code,
9568 | DECL_SELF_REFERENCE_P (decl));
9575 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
9576 Define the tag as a forward-reference if it is not defined.
9578 If a declaration is given, process it here, and report an error if
9579 multiple declarations are not identical.
9581 SCOPE is TS_CURRENT when this is also a definition. Only look in
9582 the current frame for the name (since C++ allows new names in any
9583 scope.) It is TS_WITHIN_ENCLOSING_NON_CLASS if this is a friend
9584 declaration. Only look beginning from the current scope outward up
9585 till the nearest non-class scope. Otherwise it is TS_GLOBAL.
9587 TEMPLATE_HEADER_P is true when this declaration is preceded by
9588 a set of template parameters. */
9591 xref_tag (enum tag_types tag_code, tree name,
9592 tag_scope scope, bool template_header_p)
9594 enum tree_code code;
9596 tree context = NULL_TREE;
9598 timevar_push (TV_NAME_LOOKUP);
9600 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
9612 code = ENUMERAL_TYPE;
9618 /* In case of anonymous name, xref_tag is only called to
9619 make type node and push name. Name lookup is not required. */
9620 if (ANON_AGGRNAME_P (name))
9623 t = lookup_and_check_tag (tag_code, name,
9624 scope, template_header_p);
9626 if (t == error_mark_node)
9627 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
9629 if (scope != ts_current && t && current_class_type
9630 && template_class_depth (current_class_type)
9631 && template_header_p)
9633 /* Since SCOPE is not TS_CURRENT, we are not looking at a
9634 definition of this tag. Since, in addition, we are currently
9635 processing a (member) template declaration of a template
9636 class, we must be very careful; consider:
9643 { template <class V>
9644 friend struct S1; };
9646 Here, the S2::S1 declaration should not be confused with the
9647 outer declaration. In particular, the inner version should
9648 have a template parameter of level 2, not level 1. This
9649 would be particularly important if the member declaration
9652 template <class V = U> friend struct S1;
9654 say, when we should tsubst into `U' when instantiating
9655 S2. On the other hand, when presented with:
9665 we must find the inner binding eventually. We
9666 accomplish this by making sure that the new type we
9667 create to represent this declaration has the right
9669 context = TYPE_CONTEXT (t);
9675 /* If no such tag is yet defined, create a forward-reference node
9676 and record it as the "definition".
9677 When a real declaration of this type is found,
9678 the forward-reference will be altered into a real type. */
9679 if (code == ENUMERAL_TYPE)
9681 error ("use of enum %q#D without previous declaration", name);
9682 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
9686 t = make_aggr_type (code);
9687 TYPE_CONTEXT (t) = context;
9688 t = pushtag (name, t, scope);
9693 if (template_header_p && IS_AGGR_TYPE (t))
9695 if (!redeclare_class_template (t, current_template_parms))
9696 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
9698 else if (!processing_template_decl
9700 && CLASSTYPE_IS_TEMPLATE (t))
9702 error ("redeclaration of %qT as a non-template", t);
9703 error ("previous declaration %q+D", t);
9704 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
9707 /* Make injected friend class visible. */
9708 if (scope != ts_within_enclosing_non_class
9709 && hidden_name_p (TYPE_NAME (t)))
9711 DECL_ANTICIPATED (TYPE_NAME (t)) = 0;
9712 DECL_FRIEND_P (TYPE_NAME (t)) = 0;
9714 if (TYPE_TEMPLATE_INFO (t))
9716 DECL_ANTICIPATED (TYPE_TI_TEMPLATE (t)) = 0;
9717 DECL_FRIEND_P (TYPE_TI_TEMPLATE (t)) = 0;
9722 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, t);
9726 xref_tag_from_type (tree old, tree id, tag_scope scope)
9728 enum tag_types tag_kind;
9730 if (TREE_CODE (old) == RECORD_TYPE)
9731 tag_kind = (CLASSTYPE_DECLARED_CLASS (old) ? class_type : record_type);
9733 tag_kind = union_type;
9735 if (id == NULL_TREE)
9736 id = TYPE_IDENTIFIER (old);
9738 return xref_tag (tag_kind, id, scope, false);
9741 /* Create the binfo hierarchy for REF with (possibly NULL) base list
9742 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
9743 access_* node, and the TREE_VALUE is the type of the base-class.
9744 Non-NULL TREE_TYPE indicates virtual inheritance.
9746 Returns true if the binfo hierarchy was successfully created,
9747 false if an error was detected. */
9750 xref_basetypes (tree ref, tree base_list)
9753 tree binfo, base_binfo;
9754 unsigned max_vbases = 0; /* Maximum direct & indirect virtual bases. */
9755 unsigned max_bases = 0; /* Maximum direct bases. */
9757 tree default_access;
9758 tree igo_prev; /* Track Inheritance Graph Order. */
9760 if (ref == error_mark_node)
9763 /* The base of a derived class is private by default, all others are
9765 default_access = (TREE_CODE (ref) == RECORD_TYPE
9766 && CLASSTYPE_DECLARED_CLASS (ref)
9767 ? access_private_node : access_public_node);
9769 /* First, make sure that any templates in base-classes are
9770 instantiated. This ensures that if we call ourselves recursively
9771 we do not get confused about which classes are marked and which
9776 tree basetype = TREE_VALUE (*basep);
9778 if (!(processing_template_decl && uses_template_parms (basetype))
9779 && !complete_type_or_else (basetype, NULL))
9780 /* An incomplete type. Remove it from the list. */
9781 *basep = TREE_CHAIN (*basep);
9785 if (TREE_TYPE (*basep))
9787 if (CLASS_TYPE_P (basetype))
9788 max_vbases += VEC_length (tree, CLASSTYPE_VBASECLASSES (basetype));
9789 basep = &TREE_CHAIN (*basep);
9793 TYPE_MARKED_P (ref) = 1;
9795 /* The binfo slot should be empty, unless this is an (ill-formed)
9797 gcc_assert (!TYPE_BINFO (ref) || TYPE_SIZE (ref));
9798 gcc_assert (TYPE_MAIN_VARIANT (ref) == ref);
9800 binfo = make_tree_binfo (max_bases);
9802 TYPE_BINFO (ref) = binfo;
9803 BINFO_OFFSET (binfo) = size_zero_node;
9804 BINFO_TYPE (binfo) = ref;
9808 BINFO_BASE_ACCESSES (binfo) = VEC_alloc (tree, gc, max_bases);
9809 /* An aggregate cannot have baseclasses. */
9810 CLASSTYPE_NON_AGGREGATE (ref) = 1;
9812 if (TREE_CODE (ref) == UNION_TYPE)
9814 error ("derived union %qT invalid", ref);
9821 if (TYPE_FOR_JAVA (ref))
9823 error ("Java class %qT cannot have multiple bases", ref);
9830 CLASSTYPE_VBASECLASSES (ref) = VEC_alloc (tree, gc, max_vbases);
9832 if (TYPE_FOR_JAVA (ref))
9834 error ("Java class %qT cannot have virtual bases", ref);
9839 for (igo_prev = binfo; base_list; base_list = TREE_CHAIN (base_list))
9841 tree access = TREE_PURPOSE (base_list);
9842 int via_virtual = TREE_TYPE (base_list) != NULL_TREE;
9843 tree basetype = TREE_VALUE (base_list);
9845 if (access == access_default_node)
9846 access = default_access;
9848 if (TREE_CODE (basetype) == TYPE_DECL)
9849 basetype = TREE_TYPE (basetype);
9850 if (TREE_CODE (basetype) != RECORD_TYPE
9851 && TREE_CODE (basetype) != TYPENAME_TYPE
9852 && TREE_CODE (basetype) != TEMPLATE_TYPE_PARM
9853 && TREE_CODE (basetype) != BOUND_TEMPLATE_TEMPLATE_PARM)
9855 error ("base type %qT fails to be a struct or class type",
9860 if (TYPE_FOR_JAVA (basetype) && (current_lang_depth () == 0))
9861 TYPE_FOR_JAVA (ref) = 1;
9863 base_binfo = NULL_TREE;
9864 if (CLASS_TYPE_P (basetype) && !dependent_type_p (basetype))
9866 base_binfo = TYPE_BINFO (basetype);
9867 /* The original basetype could have been a typedef'd type. */
9868 basetype = BINFO_TYPE (base_binfo);
9870 /* Inherit flags from the base. */
9871 TYPE_HAS_NEW_OPERATOR (ref)
9872 |= TYPE_HAS_NEW_OPERATOR (basetype);
9873 TYPE_HAS_ARRAY_NEW_OPERATOR (ref)
9874 |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype);
9875 TYPE_GETS_DELETE (ref) |= TYPE_GETS_DELETE (basetype);
9876 TYPE_HAS_CONVERSION (ref) |= TYPE_HAS_CONVERSION (basetype);
9877 CLASSTYPE_DIAMOND_SHAPED_P (ref)
9878 |= CLASSTYPE_DIAMOND_SHAPED_P (basetype);
9879 CLASSTYPE_REPEATED_BASE_P (ref)
9880 |= CLASSTYPE_REPEATED_BASE_P (basetype);
9883 /* We must do this test after we've seen through a typedef
9885 if (TYPE_MARKED_P (basetype))
9887 if (basetype == ref)
9888 error ("recursive type %qT undefined", basetype);
9890 error ("duplicate base type %qT invalid", basetype);
9893 TYPE_MARKED_P (basetype) = 1;
9895 base_binfo = copy_binfo (base_binfo, basetype, ref,
9896 &igo_prev, via_virtual);
9897 if (!BINFO_INHERITANCE_CHAIN (base_binfo))
9898 BINFO_INHERITANCE_CHAIN (base_binfo) = binfo;
9900 BINFO_BASE_APPEND (binfo, base_binfo);
9901 BINFO_BASE_ACCESS_APPEND (binfo, access);
9904 if (VEC_space (tree, CLASSTYPE_VBASECLASSES (ref), 1))
9905 /* If we have space in the vbase vector, we must have shared at
9906 least one of them, and are therefore diamond shaped. */
9907 CLASSTYPE_DIAMOND_SHAPED_P (ref) = 1;
9909 /* Unmark all the types. */
9910 for (i = 0; BINFO_BASE_ITERATE (binfo, i, base_binfo); i++)
9911 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
9912 TYPE_MARKED_P (ref) = 0;
9914 /* Now see if we have a repeated base type. */
9915 if (!CLASSTYPE_REPEATED_BASE_P (ref))
9917 for (base_binfo = binfo; base_binfo;
9918 base_binfo = TREE_CHAIN (base_binfo))
9920 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
9922 CLASSTYPE_REPEATED_BASE_P (ref) = 1;
9925 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 1;
9927 for (base_binfo = binfo; base_binfo;
9928 base_binfo = TREE_CHAIN (base_binfo))
9929 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
9930 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
9939 /* Begin compiling the definition of an enumeration type.
9941 Returns the type object, as yet incomplete.
9942 Also records info about it so that build_enumerator
9943 may be used to declare the individual values as they are read. */
9946 start_enum (tree name)
9950 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
9952 /* If this is the real definition for a previous forward reference,
9953 fill in the contents in the same object that used to be the
9954 forward reference. */
9956 enumtype = lookup_and_check_tag (enum_type, name,
9957 /*tag_scope=*/ts_current,
9958 /*template_header_p=*/false);
9960 if (enumtype != NULL_TREE && TREE_CODE (enumtype) == ENUMERAL_TYPE)
9962 error ("multiple definition of %q#T", enumtype);
9963 error ("%Jprevious definition here", TYPE_MAIN_DECL (enumtype));
9964 /* Clear out TYPE_VALUES, and start again. */
9965 TYPE_VALUES (enumtype) = NULL_TREE;
9969 /* In case of error, make a dummy enum to allow parsing to
9971 if (enumtype == error_mark_node)
9972 name = make_anon_name ();
9974 enumtype = make_node (ENUMERAL_TYPE);
9975 enumtype = pushtag (name, enumtype, /*tag_scope=*/ts_current);
9981 /* After processing and defining all the values of an enumeration type,
9982 install their decls in the enumeration type and finish it off.
9983 ENUMTYPE is the type object and VALUES a list of name-value pairs. */
9986 finish_enum (tree enumtype)
9995 bool use_short_enum;
9999 integer_type_kind itk;
10000 tree underlying_type = NULL_TREE;
10002 /* We built up the VALUES in reverse order. */
10003 TYPE_VALUES (enumtype) = nreverse (TYPE_VALUES (enumtype));
10005 /* For an enum defined in a template, just set the type of the values;
10006 all further processing is postponed until the template is
10007 instantiated. We need to set the type so that tsubst of a CONST_DECL
10009 if (processing_template_decl)
10011 for (values = TYPE_VALUES (enumtype);
10013 values = TREE_CHAIN (values))
10014 TREE_TYPE (TREE_VALUE (values)) = enumtype;
10015 if (at_function_scope_p ())
10016 add_stmt (build_min (TAG_DEFN, enumtype));
10020 /* Determine the minimum and maximum values of the enumerators. */
10021 if (TYPE_VALUES (enumtype))
10023 minnode = maxnode = NULL_TREE;
10025 for (values = TYPE_VALUES (enumtype);
10027 values = TREE_CHAIN (values))
10029 decl = TREE_VALUE (values);
10031 /* [dcl.enum]: Following the closing brace of an enum-specifier,
10032 each enumerator has the type of its enumeration. Prior to the
10033 closing brace, the type of each enumerator is the type of its
10034 initializing value. */
10035 TREE_TYPE (decl) = enumtype;
10037 /* Update the minimum and maximum values, if appropriate. */
10038 value = DECL_INITIAL (decl);
10039 if (value == error_mark_node)
10040 value = integer_zero_node;
10041 /* Figure out what the minimum and maximum values of the
10042 enumerators are. */
10044 minnode = maxnode = value;
10045 else if (tree_int_cst_lt (maxnode, value))
10047 else if (tree_int_cst_lt (value, minnode))
10054 If the enumerator-list is empty, the underlying type is as if
10055 the enumeration had a single enumerator with value 0. */
10056 minnode = maxnode = integer_zero_node;
10058 /* Compute the number of bits require to represent all values of the
10059 enumeration. We must do this before the type of MINNODE and
10060 MAXNODE are transformed, since min_precision relies on the
10061 TREE_TYPE of the value it is passed. */
10062 unsignedp = tree_int_cst_sgn (minnode) >= 0;
10063 lowprec = min_precision (minnode, unsignedp);
10064 highprec = min_precision (maxnode, unsignedp);
10065 precision = MAX (lowprec, highprec);
10067 /* Determine the underlying type of the enumeration.
10071 The underlying type of an enumeration is an integral type that
10072 can represent all the enumerator values defined in the
10073 enumeration. It is implementation-defined which integral type is
10074 used as the underlying type for an enumeration except that the
10075 underlying type shall not be larger than int unless the value of
10076 an enumerator cannot fit in an int or unsigned int.
10078 We use "int" or an "unsigned int" as the underlying type, even if
10079 a smaller integral type would work, unless the user has
10080 explicitly requested that we use the smallest possible type. The
10081 user can request that for all enumerations with a command line
10082 flag, or for just one enumeration with an attribute. */
10084 use_short_enum = flag_short_enums
10085 || lookup_attribute ("packed", TYPE_ATTRIBUTES (enumtype));
10087 for (itk = (use_short_enum ? itk_char : itk_int);
10091 underlying_type = integer_types[itk];
10092 if (TYPE_PRECISION (underlying_type) >= precision
10093 && TYPE_UNSIGNED (underlying_type) == unsignedp)
10096 if (itk == itk_none)
10100 IF no integral type can represent all the enumerator values, the
10101 enumeration is ill-formed. */
10102 error ("no integral type can represent all of the enumerator values "
10103 "for %qT", enumtype);
10104 precision = TYPE_PRECISION (long_long_integer_type_node);
10105 underlying_type = integer_types[itk_unsigned_long_long];
10108 /* Compute the minium and maximum values for the type.
10112 For an enumeration where emin is the smallest enumerator and emax
10113 is the largest, the values of the enumeration are the values of the
10114 underlying type in the range bmin to bmax, where bmin and bmax are,
10115 respectively, the smallest and largest values of the smallest bit-
10116 field that can store emin and emax. */
10118 /* The middle-end currently assumes that types with TYPE_PRECISION
10119 narrower than their underlying type are suitably zero or sign
10120 extended to fill their mode. g++ doesn't make these guarantees.
10121 Until the middle-end can represent such paradoxical types, we
10122 set the TYPE_PRECISION to the width of the underlying type. */
10123 TYPE_PRECISION (enumtype) = TYPE_PRECISION (underlying_type);
10125 set_min_and_max_values_for_integral_type (enumtype, precision, unsignedp);
10129 The value of sizeof() applied to an enumeration type, an object
10130 of an enumeration type, or an enumerator, is the value of sizeof()
10131 applied to the underlying type. */
10132 TYPE_SIZE (enumtype) = TYPE_SIZE (underlying_type);
10133 TYPE_SIZE_UNIT (enumtype) = TYPE_SIZE_UNIT (underlying_type);
10134 TYPE_MODE (enumtype) = TYPE_MODE (underlying_type);
10135 TYPE_ALIGN (enumtype) = TYPE_ALIGN (underlying_type);
10136 TYPE_USER_ALIGN (enumtype) = TYPE_USER_ALIGN (underlying_type);
10137 TYPE_UNSIGNED (enumtype) = TYPE_UNSIGNED (underlying_type);
10139 /* Convert each of the enumerators to the type of the underlying
10140 type of the enumeration. */
10141 for (values = TYPE_VALUES (enumtype); values; values = TREE_CHAIN (values))
10143 location_t saved_location;
10145 decl = TREE_VALUE (values);
10146 saved_location = input_location;
10147 input_location = DECL_SOURCE_LOCATION (decl);
10148 value = perform_implicit_conversion (underlying_type,
10149 DECL_INITIAL (decl));
10150 input_location = saved_location;
10152 /* Do not clobber shared ints. */
10153 value = copy_node (value);
10155 TREE_TYPE (value) = enumtype;
10156 DECL_INITIAL (decl) = value;
10157 TREE_VALUE (values) = value;
10160 /* Fix up all variant types of this enum type. */
10161 for (t = TYPE_MAIN_VARIANT (enumtype); t; t = TYPE_NEXT_VARIANT (t))
10163 TYPE_VALUES (t) = TYPE_VALUES (enumtype);
10164 TYPE_MIN_VALUE (t) = TYPE_MIN_VALUE (enumtype);
10165 TYPE_MAX_VALUE (t) = TYPE_MAX_VALUE (enumtype);
10166 TYPE_SIZE (t) = TYPE_SIZE (enumtype);
10167 TYPE_SIZE_UNIT (t) = TYPE_SIZE_UNIT (enumtype);
10168 TYPE_MODE (t) = TYPE_MODE (enumtype);
10169 TYPE_PRECISION (t) = TYPE_PRECISION (enumtype);
10170 TYPE_ALIGN (t) = TYPE_ALIGN (enumtype);
10171 TYPE_USER_ALIGN (t) = TYPE_USER_ALIGN (enumtype);
10172 TYPE_UNSIGNED (t) = TYPE_UNSIGNED (enumtype);
10175 /* Finish debugging output for this type. */
10176 rest_of_type_compilation (enumtype, namespace_bindings_p ());
10179 /* Build and install a CONST_DECL for an enumeration constant of the
10180 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
10181 Assignment of sequential values by default is handled here. */
10184 build_enumerator (tree name, tree value, tree enumtype)
10190 /* If the VALUE was erroneous, pretend it wasn't there; that will
10191 result in the enum being assigned the next value in sequence. */
10192 if (value == error_mark_node)
10195 /* Remove no-op casts from the value. */
10197 STRIP_TYPE_NOPS (value);
10199 if (! processing_template_decl)
10201 /* Validate and default VALUE. */
10202 if (value != NULL_TREE)
10204 value = integral_constant_value (value);
10206 if (TREE_CODE (value) == INTEGER_CST)
10208 value = perform_integral_promotions (value);
10209 constant_expression_warning (value);
10213 error ("enumerator value for %qD not integer constant", name);
10218 /* Default based on previous value. */
10219 if (value == NULL_TREE)
10221 if (TYPE_VALUES (enumtype))
10224 unsigned HOST_WIDE_INT lo;
10228 /* The next value is the previous value plus one. We can
10229 safely assume that the previous value is an INTEGER_CST.
10230 add_double doesn't know the type of the target expression,
10231 so we must check with int_fits_type_p as well. */
10232 prev_value = DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype)));
10233 overflowed = add_double (TREE_INT_CST_LOW (prev_value),
10234 TREE_INT_CST_HIGH (prev_value),
10236 value = build_int_cst_wide (TREE_TYPE (prev_value), lo, hi);
10237 overflowed |= !int_fits_type_p (value, TREE_TYPE (prev_value));
10241 error ("overflow in enumeration values at %qD", name);
10242 value = error_mark_node;
10246 value = integer_zero_node;
10249 /* Remove no-op casts from the value. */
10250 STRIP_TYPE_NOPS (value);
10253 /* C++ associates enums with global, function, or class declarations. */
10254 context = current_scope ();
10256 /* Build the actual enumeration constant. Note that the enumeration
10257 constants have the type of their initializers until the
10258 enumeration is complete:
10262 Following the closing brace of an enum-specifier, each enumer-
10263 ator has the type of its enumeration. Prior to the closing
10264 brace, the type of each enumerator is the type of its
10265 initializing value.
10267 In finish_enum we will reset the type. Of course, if we're
10268 processing a template, there may be no value. */
10269 type = value ? TREE_TYPE (value) : NULL_TREE;
10271 if (context && context == current_class_type)
10272 /* This enum declaration is local to the class. We need the full
10273 lang_decl so that we can record DECL_CLASS_CONTEXT, for example. */
10274 decl = build_lang_decl (CONST_DECL, name, type);
10276 /* It's a global enum, or it's local to a function. (Note local to
10277 a function could mean local to a class method. */
10278 decl = build_decl (CONST_DECL, name, type);
10280 DECL_CONTEXT (decl) = FROB_CONTEXT (context);
10281 TREE_CONSTANT (decl) = 1;
10282 TREE_INVARIANT (decl) = 1;
10283 TREE_READONLY (decl) = 1;
10284 DECL_INITIAL (decl) = value;
10286 if (context && context == current_class_type)
10287 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
10288 on the TYPE_FIELDS list for `S'. (That's so that you can say
10289 things like `S::i' later.) */
10290 finish_member_declaration (decl);
10294 /* Add this enumeration constant to the list for this type. */
10295 TYPE_VALUES (enumtype) = tree_cons (name, decl, TYPE_VALUES (enumtype));
10299 /* We're defining DECL. Make sure that it's type is OK. */
10302 check_function_type (tree decl, tree current_function_parms)
10304 tree fntype = TREE_TYPE (decl);
10305 tree return_type = complete_type (TREE_TYPE (fntype));
10307 /* In a function definition, arg types must be complete. */
10308 require_complete_types_for_parms (current_function_parms);
10310 if (dependent_type_p (return_type))
10312 if (!COMPLETE_OR_VOID_TYPE_P (return_type))
10314 tree args = TYPE_ARG_TYPES (fntype);
10316 error ("return type %q#T is incomplete", return_type);
10318 /* Make it return void instead. */
10319 if (TREE_CODE (fntype) == METHOD_TYPE)
10320 fntype = build_method_type_directly (TREE_TYPE (TREE_VALUE (args)),
10322 TREE_CHAIN (args));
10324 fntype = build_function_type (void_type_node, args);
10326 = build_exception_variant (fntype,
10327 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (decl)));
10330 abstract_virtuals_error (decl, TREE_TYPE (fntype));
10333 /* Create the FUNCTION_DECL for a function definition.
10334 DECLSPECS and DECLARATOR are the parts of the declaration;
10335 they describe the function's name and the type it returns,
10336 but twisted together in a fashion that parallels the syntax of C.
10338 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
10339 DECLARATOR is really the DECL for the function we are about to
10340 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
10341 indicating that the function is an inline defined in-class.
10343 This function creates a binding context for the function body
10344 as well as setting up the FUNCTION_DECL in current_function_decl.
10346 For C++, we must first check whether that datum makes any sense.
10347 For example, "class A local_a(1,2);" means that variable local_a
10348 is an aggregate of type A, which should have a constructor
10349 applied to it with the argument list [1, 2]. */
10352 start_preparsed_function (tree decl1, tree attrs, int flags)
10354 tree ctype = NULL_TREE;
10357 int doing_friend = 0;
10358 struct cp_binding_level *bl;
10359 tree current_function_parms;
10360 struct c_fileinfo *finfo
10361 = get_fileinfo (LOCATION_FILE (DECL_SOURCE_LOCATION (decl1)));
10362 bool honor_interface;
10364 /* Sanity check. */
10365 gcc_assert (TREE_CODE (TREE_VALUE (void_list_node)) == VOID_TYPE);
10366 gcc_assert (TREE_CHAIN (void_list_node) == NULL_TREE);
10368 fntype = TREE_TYPE (decl1);
10369 if (TREE_CODE (fntype) == METHOD_TYPE)
10370 ctype = TYPE_METHOD_BASETYPE (fntype);
10372 /* ISO C++ 11.4/5. A friend function defined in a class is in
10373 the (lexical) scope of the class in which it is defined. */
10374 if (!ctype && DECL_FRIEND_P (decl1))
10376 ctype = DECL_FRIEND_CONTEXT (decl1);
10378 /* CTYPE could be null here if we're dealing with a template;
10379 for example, `inline friend float foo()' inside a template
10380 will have no CTYPE set. */
10381 if (ctype && TREE_CODE (ctype) != RECORD_TYPE)
10387 if (DECL_DECLARED_INLINE_P (decl1)
10388 && lookup_attribute ("noinline", attrs))
10389 warning (0, "inline function %q+D given attribute noinline", decl1);
10391 if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1))
10392 /* This is a constructor, we must ensure that any default args
10393 introduced by this definition are propagated to the clones
10394 now. The clones are used directly in overload resolution. */
10395 adjust_clone_args (decl1);
10397 /* Sometimes we don't notice that a function is a static member, and
10398 build a METHOD_TYPE for it. Fix that up now. */
10399 if (ctype != NULL_TREE && DECL_STATIC_FUNCTION_P (decl1)
10400 && TREE_CODE (TREE_TYPE (decl1)) == METHOD_TYPE)
10402 revert_static_member_fn (decl1);
10406 /* Set up current_class_type, and enter the scope of the class, if
10409 push_nested_class (ctype);
10410 else if (DECL_STATIC_FUNCTION_P (decl1))
10411 push_nested_class (DECL_CONTEXT (decl1));
10413 /* Now that we have entered the scope of the class, we must restore
10414 the bindings for any template parameters surrounding DECL1, if it
10415 is an inline member template. (Order is important; consider the
10416 case where a template parameter has the same name as a field of
10417 the class.) It is not until after this point that
10418 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
10419 if (flags & SF_INCLASS_INLINE)
10420 maybe_begin_member_template_processing (decl1);
10422 /* Effective C++ rule 15. */
10424 && DECL_OVERLOADED_OPERATOR_P (decl1) == NOP_EXPR
10425 && TREE_CODE (TREE_TYPE (fntype)) == VOID_TYPE)
10426 warning (OPT_Weffc__, "%<operator=%> should return a reference to %<*this%>");
10428 /* Make the init_value nonzero so pushdecl knows this is not tentative.
10429 error_mark_node is replaced below (in poplevel) with the BLOCK. */
10430 if (!DECL_INITIAL (decl1))
10431 DECL_INITIAL (decl1) = error_mark_node;
10433 /* This function exists in static storage.
10434 (This does not mean `static' in the C sense!) */
10435 TREE_STATIC (decl1) = 1;
10437 /* We must call push_template_decl after current_class_type is set
10438 up. (If we are processing inline definitions after exiting a
10439 class scope, current_class_type will be NULL_TREE until set above
10440 by push_nested_class.) */
10441 if (processing_template_decl)
10443 /* FIXME: Handle error_mark_node more gracefully. */
10444 tree newdecl1 = push_template_decl (decl1);
10445 if (newdecl1 != error_mark_node)
10449 /* We are now in the scope of the function being defined. */
10450 current_function_decl = decl1;
10452 /* Save the parm names or decls from this function's declarator
10453 where store_parm_decls will find them. */
10454 current_function_parms = DECL_ARGUMENTS (decl1);
10456 /* Make sure the parameter and return types are reasonable. When
10457 you declare a function, these types can be incomplete, but they
10458 must be complete when you define the function. */
10459 check_function_type (decl1, current_function_parms);
10461 /* Build the return declaration for the function. */
10462 restype = TREE_TYPE (fntype);
10463 /* Promote the value to int before returning it. */
10464 if (c_promoting_integer_type_p (restype))
10465 restype = type_promotes_to (restype);
10466 if (DECL_RESULT (decl1) == NULL_TREE)
10470 resdecl = build_decl (RESULT_DECL, 0, TYPE_MAIN_VARIANT (restype));
10471 DECL_ARTIFICIAL (resdecl) = 1;
10472 DECL_IGNORED_P (resdecl) = 1;
10473 DECL_RESULT (decl1) = resdecl;
10475 cp_apply_type_quals_to_decl (cp_type_quals (restype), resdecl);
10478 /* Initialize RTL machinery. We cannot do this until
10479 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
10480 even when processing a template; this is how we get
10481 CFUN set up, and our per-function variables initialized.
10482 FIXME factor out the non-RTL stuff. */
10483 bl = current_binding_level;
10484 allocate_struct_function (decl1);
10485 current_binding_level = bl;
10487 /* Even though we're inside a function body, we still don't want to
10488 call expand_expr to calculate the size of a variable-sized array.
10489 We haven't necessarily assigned RTL to all variables yet, so it's
10490 not safe to try to expand expressions involving them. */
10491 cfun->x_dont_save_pending_sizes_p = 1;
10493 /* Start the statement-tree, start the tree now. */
10494 DECL_SAVED_TREE (decl1) = push_stmt_list ();
10496 /* Let the user know we're compiling this function. */
10497 announce_function (decl1);
10499 /* Record the decl so that the function name is defined.
10500 If we already have a decl for this name, and it is a FUNCTION_DECL,
10501 use the old decl. */
10502 if (!processing_template_decl && !(flags & SF_PRE_PARSED))
10504 /* A specialization is not used to guide overload resolution. */
10505 if (!DECL_FUNCTION_MEMBER_P (decl1)
10506 && !(DECL_USE_TEMPLATE (decl1) &&
10507 PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl1))))
10509 tree olddecl = pushdecl (decl1);
10511 if (olddecl == error_mark_node)
10512 /* If something went wrong when registering the declaration,
10513 use DECL1; we have to have a FUNCTION_DECL to use when
10514 parsing the body of the function. */
10517 /* Otherwise, OLDDECL is either a previous declaration of
10518 the same function or DECL1 itself. */
10523 /* We need to set the DECL_CONTEXT. */
10524 if (!DECL_CONTEXT (decl1) && DECL_TEMPLATE_INFO (decl1))
10525 DECL_CONTEXT (decl1) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1));
10527 fntype = TREE_TYPE (decl1);
10529 /* If #pragma weak applies, mark the decl appropriately now.
10530 The pragma only applies to global functions. Because
10531 determining whether or not the #pragma applies involves
10532 computing the mangled name for the declaration, we cannot
10533 apply the pragma until after we have merged this declaration
10534 with any previous declarations; if the original declaration
10535 has a linkage specification, that specification applies to
10536 the definition as well, and may affect the mangled name. */
10537 if (!DECL_CONTEXT (decl1))
10538 maybe_apply_pragma_weak (decl1);
10541 /* Reset these in case the call to pushdecl changed them. */
10542 current_function_decl = decl1;
10543 cfun->decl = decl1;
10545 /* If we are (erroneously) defining a function that we have already
10546 defined before, wipe out what we knew before. */
10547 if (!DECL_PENDING_INLINE_P (decl1))
10548 DECL_SAVED_FUNCTION_DATA (decl1) = NULL;
10550 if (ctype && !doing_friend && !DECL_STATIC_FUNCTION_P (decl1))
10552 /* We know that this was set up by `grokclassfn'. We do not
10553 wait until `store_parm_decls', since evil parse errors may
10554 never get us to that point. Here we keep the consistency
10555 between `current_class_type' and `current_class_ptr'. */
10556 tree t = DECL_ARGUMENTS (decl1);
10558 gcc_assert (t != NULL_TREE && TREE_CODE (t) == PARM_DECL);
10559 gcc_assert (TREE_CODE (TREE_TYPE (t)) == POINTER_TYPE);
10561 cp_function_chain->x_current_class_ref
10562 = build_indirect_ref (t, NULL);
10563 cp_function_chain->x_current_class_ptr = t;
10565 /* Constructors and destructors need to know whether they're "in
10566 charge" of initializing virtual base classes. */
10567 t = TREE_CHAIN (t);
10568 if (DECL_HAS_IN_CHARGE_PARM_P (decl1))
10570 current_in_charge_parm = t;
10571 t = TREE_CHAIN (t);
10573 if (DECL_HAS_VTT_PARM_P (decl1))
10575 gcc_assert (DECL_NAME (t) == vtt_parm_identifier);
10576 current_vtt_parm = t;
10580 honor_interface = (!DECL_TEMPLATE_INSTANTIATION (decl1)
10581 /* Implicitly-defined methods (like the
10582 destructor for a class in which no destructor
10583 is explicitly declared) must not be defined
10584 until their definition is needed. So, we
10585 ignore interface specifications for
10586 compiler-generated functions. */
10587 && !DECL_ARTIFICIAL (decl1));
10589 if (DECL_INTERFACE_KNOWN (decl1))
10591 tree ctx = decl_function_context (decl1);
10593 if (DECL_NOT_REALLY_EXTERN (decl1))
10594 DECL_EXTERNAL (decl1) = 0;
10596 if (ctx != NULL_TREE && DECL_DECLARED_INLINE_P (ctx)
10597 && TREE_PUBLIC (ctx))
10598 /* This is a function in a local class in an extern inline
10600 comdat_linkage (decl1);
10602 /* If this function belongs to an interface, it is public.
10603 If it belongs to someone else's interface, it is also external.
10604 This only affects inlines and template instantiations. */
10605 else if (!finfo->interface_unknown && honor_interface)
10607 if (DECL_DECLARED_INLINE_P (decl1)
10608 || DECL_TEMPLATE_INSTANTIATION (decl1)
10609 || processing_template_decl)
10611 DECL_EXTERNAL (decl1)
10612 = (finfo->interface_only
10613 || (DECL_DECLARED_INLINE_P (decl1)
10614 && ! flag_implement_inlines
10615 && !DECL_VINDEX (decl1)));
10617 /* For WIN32 we also want to put these in linkonce sections. */
10618 maybe_make_one_only (decl1);
10621 DECL_EXTERNAL (decl1) = 0;
10622 DECL_INTERFACE_KNOWN (decl1) = 1;
10623 /* If this function is in an interface implemented in this file,
10624 make sure that the backend knows to emit this function
10626 if (!DECL_EXTERNAL (decl1))
10627 mark_needed (decl1);
10629 else if (finfo->interface_unknown && finfo->interface_only
10630 && honor_interface)
10632 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
10633 interface, we will have both finfo->interface_unknown and
10634 finfo->interface_only set. In that case, we don't want to
10635 use the normal heuristics because someone will supply a
10636 #pragma implementation elsewhere, and deducing it here would
10637 produce a conflict. */
10638 comdat_linkage (decl1);
10639 DECL_EXTERNAL (decl1) = 0;
10640 DECL_INTERFACE_KNOWN (decl1) = 1;
10641 DECL_DEFER_OUTPUT (decl1) = 1;
10645 /* This is a definition, not a reference.
10646 So clear DECL_EXTERNAL. */
10647 DECL_EXTERNAL (decl1) = 0;
10649 if ((DECL_DECLARED_INLINE_P (decl1)
10650 || DECL_TEMPLATE_INSTANTIATION (decl1))
10651 && ! DECL_INTERFACE_KNOWN (decl1)
10652 /* Don't try to defer nested functions for now. */
10653 && ! decl_function_context (decl1))
10654 DECL_DEFER_OUTPUT (decl1) = 1;
10656 DECL_INTERFACE_KNOWN (decl1) = 1;
10659 /* Determine the ELF visibility attribute for the function. We must not
10660 do this before calling "pushdecl", as we must allow "duplicate_decls"
10661 to merge any attributes appropriately. We also need to wait until
10663 if (!DECL_CLONED_FUNCTION_P (decl1))
10664 determine_visibility (decl1);
10666 begin_scope (sk_function_parms, decl1);
10670 if (DECL_DESTRUCTOR_P (decl1)
10671 || (DECL_CONSTRUCTOR_P (decl1)
10672 && targetm.cxx.cdtor_returns_this ()))
10674 cdtor_label = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
10675 DECL_CONTEXT (cdtor_label) = current_function_decl;
10678 start_fname_decls ();
10680 store_parm_decls (current_function_parms);
10684 /* Like start_preparsed_function, except that instead of a
10685 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
10687 Returns 1 on success. If the DECLARATOR is not suitable for a function
10688 (it defines a datum instead), we return 0, which tells
10689 yyparse to report a parse error. */
10692 start_function (cp_decl_specifier_seq *declspecs,
10693 const cp_declarator *declarator,
10698 decl1 = grokdeclarator (declarator, declspecs, FUNCDEF, 1, &attrs);
10699 /* If the declarator is not suitable for a function definition,
10700 cause a syntax error. */
10701 if (decl1 == NULL_TREE || TREE_CODE (decl1) != FUNCTION_DECL)
10704 if (DECL_MAIN_P (decl1))
10705 /* main must return int. grokfndecl should have corrected it
10706 (and issued a diagnostic) if the user got it wrong. */
10707 gcc_assert (same_type_p (TREE_TYPE (TREE_TYPE (decl1)),
10708 integer_type_node));
10710 start_preparsed_function (decl1, attrs, /*flags=*/SF_DEFAULT);
10715 /* Returns true iff an EH_SPEC_BLOCK should be created in the body of
10719 use_eh_spec_block (tree fn)
10721 return (flag_exceptions && flag_enforce_eh_specs
10722 && !processing_template_decl
10723 && TYPE_RAISES_EXCEPTIONS (TREE_TYPE (fn))
10724 /* We insert the EH_SPEC_BLOCK only in the original
10725 function; then, it is copied automatically to the
10727 && !DECL_CLONED_FUNCTION_P (fn)
10728 /* Implicitly-generated constructors and destructors have
10729 exception specifications. However, those specifications
10730 are the union of the possible exceptions specified by the
10731 constructors/destructors for bases and members, so no
10732 unallowed exception will ever reach this function. By
10733 not creating the EH_SPEC_BLOCK we save a little memory,
10734 and we avoid spurious warnings about unreachable
10736 && !DECL_ARTIFICIAL (fn));
10739 /* Store the parameter declarations into the current function declaration.
10740 This is called after parsing the parameter declarations, before
10741 digesting the body of the function.
10743 Also install to binding contour return value identifier, if any. */
10746 store_parm_decls (tree current_function_parms)
10748 tree fndecl = current_function_decl;
10751 /* This is a chain of any other decls that came in among the parm
10752 declarations. If a parm is declared with enum {foo, bar} x;
10753 then CONST_DECLs for foo and bar are put here. */
10754 tree nonparms = NULL_TREE;
10756 if (current_function_parms)
10758 /* This case is when the function was defined with an ANSI prototype.
10759 The parms already have decls, so we need not do anything here
10760 except record them as in effect
10761 and complain if any redundant old-style parm decls were written. */
10763 tree specparms = current_function_parms;
10766 /* Must clear this because it might contain TYPE_DECLs declared
10768 current_binding_level->names = NULL;
10770 /* If we're doing semantic analysis, then we'll call pushdecl
10771 for each of these. We must do them in reverse order so that
10772 they end in the correct forward order. */
10773 specparms = nreverse (specparms);
10775 for (parm = specparms; parm; parm = next)
10777 next = TREE_CHAIN (parm);
10778 if (TREE_CODE (parm) == PARM_DECL)
10780 if (DECL_NAME (parm) == NULL_TREE
10781 || TREE_CODE (parm) != VOID_TYPE)
10784 error ("parameter %qD declared void", parm);
10788 /* If we find an enum constant or a type tag,
10789 put it aside for the moment. */
10790 TREE_CHAIN (parm) = NULL_TREE;
10791 nonparms = chainon (nonparms, parm);
10795 /* Get the decls in their original chain order and record in the
10796 function. This is all and only the PARM_DECLs that were
10797 pushed into scope by the loop above. */
10798 DECL_ARGUMENTS (fndecl) = getdecls ();
10801 DECL_ARGUMENTS (fndecl) = NULL_TREE;
10803 /* Now store the final chain of decls for the arguments
10804 as the decl-chain of the current lexical scope.
10805 Put the enumerators in as well, at the front so that
10806 DECL_ARGUMENTS is not modified. */
10807 current_binding_level->names = chainon (nonparms, DECL_ARGUMENTS (fndecl));
10809 if (use_eh_spec_block (current_function_decl))
10810 current_eh_spec_block = begin_eh_spec_block ();
10814 /* We have finished doing semantic analysis on DECL, but have not yet
10815 generated RTL for its body. Save away our current state, so that
10816 when we want to generate RTL later we know what to do. */
10819 save_function_data (tree decl)
10821 struct language_function *f;
10823 /* Save the language-specific per-function data so that we can
10824 get it back when we really expand this function. */
10825 gcc_assert (!DECL_PENDING_INLINE_P (decl));
10828 f = GGC_NEW (struct language_function);
10829 memcpy (f, cp_function_chain, sizeof (struct language_function));
10830 DECL_SAVED_FUNCTION_DATA (decl) = f;
10832 /* Clear out the bits we don't need. */
10833 f->base.x_stmt_tree.x_cur_stmt_list = NULL_TREE;
10834 f->bindings = NULL;
10835 f->x_local_names = NULL;
10839 /* Set the return value of the constructor (if present). */
10842 finish_constructor_body (void)
10847 if (targetm.cxx.cdtor_returns_this ())
10849 /* Any return from a constructor will end up here. */
10850 add_stmt (build_stmt (LABEL_EXPR, cdtor_label));
10852 val = DECL_ARGUMENTS (current_function_decl);
10853 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
10854 DECL_RESULT (current_function_decl), val);
10855 /* Return the address of the object. */
10856 exprstmt = build_stmt (RETURN_EXPR, val);
10857 add_stmt (exprstmt);
10861 /* Do all the processing for the beginning of a destructor; set up the
10862 vtable pointers and cleanups for bases and members. */
10865 begin_destructor_body (void)
10867 tree compound_stmt;
10869 /* If the CURRENT_CLASS_TYPE is incomplete, we will have already
10870 issued an error message. We still want to try to process the
10871 body of the function, but initialize_vtbl_ptrs will crash if
10872 TYPE_BINFO is NULL. */
10873 if (COMPLETE_TYPE_P (current_class_type))
10875 compound_stmt = begin_compound_stmt (0);
10876 /* Make all virtual function table pointers in non-virtual base
10877 classes point to CURRENT_CLASS_TYPE's virtual function
10879 initialize_vtbl_ptrs (current_class_ptr);
10880 finish_compound_stmt (compound_stmt);
10882 /* And insert cleanups for our bases and members so that they
10883 will be properly destroyed if we throw. */
10884 push_base_cleanups ();
10888 /* At the end of every destructor we generate code to delete the object if
10889 necessary. Do that now. */
10892 finish_destructor_body (void)
10896 /* Any return from a destructor will end up here; that way all base
10897 and member cleanups will be run when the function returns. */
10898 add_stmt (build_stmt (LABEL_EXPR, cdtor_label));
10900 /* In a virtual destructor, we must call delete. */
10901 if (DECL_VIRTUAL_P (current_function_decl))
10904 tree virtual_size = cxx_sizeof (current_class_type);
10908 At the point of definition of a virtual destructor (including
10909 an implicit definition), non-placement operator delete shall
10910 be looked up in the scope of the destructor's class and if
10911 found shall be accessible and unambiguous. */
10912 exprstmt = build_op_delete_call(DELETE_EXPR, current_class_ptr,
10914 /*global_p=*/false,
10915 /*placement=*/NULL_TREE,
10916 /*alloc_fn=*/NULL_TREE);
10918 if_stmt = begin_if_stmt ();
10919 finish_if_stmt_cond (build2 (BIT_AND_EXPR, integer_type_node,
10920 current_in_charge_parm,
10923 finish_expr_stmt (exprstmt);
10924 finish_then_clause (if_stmt);
10925 finish_if_stmt (if_stmt);
10928 if (targetm.cxx.cdtor_returns_this ())
10932 val = DECL_ARGUMENTS (current_function_decl);
10933 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
10934 DECL_RESULT (current_function_decl), val);
10935 /* Return the address of the object. */
10936 exprstmt = build_stmt (RETURN_EXPR, val);
10937 add_stmt (exprstmt);
10941 /* Do the necessary processing for the beginning of a function body, which
10942 in this case includes member-initializers, but not the catch clauses of
10943 a function-try-block. Currently, this means opening a binding level
10944 for the member-initializers (in a ctor) and member cleanups (in a dtor). */
10947 begin_function_body (void)
10951 if (! FUNCTION_NEEDS_BODY_BLOCK (current_function_decl))
10954 if (processing_template_decl)
10955 /* Do nothing now. */;
10957 /* Always keep the BLOCK node associated with the outermost pair of
10958 curly braces of a function. These are needed for correct
10959 operation of dwarfout.c. */
10960 keep_next_level (true);
10962 stmt = begin_compound_stmt (BCS_FN_BODY);
10964 if (processing_template_decl)
10965 /* Do nothing now. */;
10966 else if (DECL_DESTRUCTOR_P (current_function_decl))
10967 begin_destructor_body ();
10972 /* Do the processing for the end of a function body. Currently, this means
10973 closing out the cleanups for fully-constructed bases and members, and in
10974 the case of the destructor, deleting the object if desired. Again, this
10975 is only meaningful for [cd]tors, since they are the only functions where
10976 there is a significant distinction between the main body and any
10977 function catch clauses. Handling, say, main() return semantics here
10978 would be wrong, as flowing off the end of a function catch clause for
10979 main() would also need to return 0. */
10982 finish_function_body (tree compstmt)
10984 if (compstmt == NULL_TREE)
10987 /* Close the block. */
10988 finish_compound_stmt (compstmt);
10990 if (processing_template_decl)
10991 /* Do nothing now. */;
10992 else if (DECL_CONSTRUCTOR_P (current_function_decl))
10993 finish_constructor_body ();
10994 else if (DECL_DESTRUCTOR_P (current_function_decl))
10995 finish_destructor_body ();
10998 /* Given a function, returns the BLOCK corresponding to the outermost level
10999 of curly braces, skipping the artificial block created for constructor
11003 outer_curly_brace_block (tree fndecl)
11005 tree block = BLOCK_SUBBLOCKS (DECL_INITIAL (fndecl));
11006 if (FUNCTION_NEEDS_BODY_BLOCK (current_function_decl))
11007 /* Skip the artificial function body block. */
11008 block = BLOCK_SUBBLOCKS (block);
11012 /* Finish up a function declaration and compile that function
11013 all the way to assembler language output. The free the storage
11014 for the function definition.
11016 FLAGS is a bitwise or of the following values:
11018 We just finished processing the body of an in-class inline
11019 function definition. (This processing will have taken place
11020 after the class definition is complete.) */
11023 finish_function (int flags)
11025 tree fndecl = current_function_decl;
11026 tree fntype, ctype = NULL_TREE;
11027 int inclass_inline = (flags & 2) != 0;
11030 /* When we get some parse errors, we can end up without a
11031 current_function_decl, so cope. */
11032 if (fndecl == NULL_TREE)
11033 return error_mark_node;
11035 if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fndecl)
11036 && DECL_VIRTUAL_P (fndecl)
11037 && !processing_template_decl)
11039 tree fnclass = DECL_CONTEXT (fndecl);
11040 if (fndecl == CLASSTYPE_KEY_METHOD (fnclass))
11041 keyed_classes = tree_cons (NULL_TREE, fnclass, keyed_classes);
11044 nested = function_depth > 1;
11045 fntype = TREE_TYPE (fndecl);
11047 /* TREE_READONLY (fndecl) = 1;
11048 This caused &foo to be of type ptr-to-const-function
11049 which then got a warning when stored in a ptr-to-function variable. */
11051 gcc_assert (building_stmt_tree ());
11053 /* For a cloned function, we've already got all the code we need;
11054 there's no need to add any extra bits. */
11055 if (!DECL_CLONED_FUNCTION_P (fndecl))
11057 if (DECL_MAIN_P (current_function_decl))
11061 /* Make it so that `main' always returns 0 by default (or
11064 stmt = finish_return_stmt (integer_one_node);
11066 stmt = finish_return_stmt (integer_zero_node);
11068 /* Hack. We don't want the middle-end to warn that this
11069 return is unreachable, so put the statement on the
11071 #ifdef USE_MAPPED_LOCATION
11072 SET_EXPR_LOCATION (stmt, UNKNOWN_LOCATION);
11074 annotate_with_file_line (stmt, input_filename, 0);
11078 if (use_eh_spec_block (current_function_decl))
11079 finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
11080 (TREE_TYPE (current_function_decl)),
11081 current_eh_spec_block);
11084 /* If we're saving up tree structure, tie off the function now. */
11085 DECL_SAVED_TREE (fndecl) = pop_stmt_list (DECL_SAVED_TREE (fndecl));
11087 finish_fname_decls ();
11089 /* If this function can't throw any exceptions, remember that. */
11090 if (!processing_template_decl
11091 && !cp_function_chain->can_throw
11092 && !flag_non_call_exceptions
11093 && targetm.binds_local_p (fndecl))
11094 TREE_NOTHROW (fndecl) = 1;
11096 /* This must come after expand_function_end because cleanups might
11097 have declarations (from inline functions) that need to go into
11098 this function's blocks. */
11100 /* If the current binding level isn't the outermost binding level
11101 for this function, either there is a bug, or we have experienced
11102 syntax errors and the statement tree is malformed. */
11103 if (current_binding_level->kind != sk_function_parms)
11105 /* Make sure we have already experienced errors. */
11106 gcc_assert (errorcount);
11108 /* Throw away the broken statement tree and extra binding
11110 DECL_SAVED_TREE (fndecl) = alloc_stmt_list ();
11112 while (current_binding_level->kind != sk_function_parms)
11114 if (current_binding_level->kind == sk_class)
11115 pop_nested_class ();
11117 poplevel (0, 0, 0);
11120 poplevel (1, 0, 1);
11122 /* Statements should always be full-expressions at the outermost set
11123 of curly braces for a function. */
11124 gcc_assert (stmts_are_full_exprs_p ());
11126 /* Set up the named return value optimization, if we can. Candidate
11127 variables are selected in check_return_value. */
11128 if (current_function_return_value)
11130 tree r = current_function_return_value;
11133 if (r != error_mark_node
11134 /* This is only worth doing for fns that return in memory--and
11135 simpler, since we don't have to worry about promoted modes. */
11136 && aggregate_value_p (TREE_TYPE (TREE_TYPE (fndecl)), fndecl)
11137 /* Only allow this for variables declared in the outer scope of
11138 the function so we know that their lifetime always ends with a
11139 return; see g++.dg/opt/nrv6.C. We could be more flexible if
11140 we were to do this optimization in tree-ssa. */
11141 && (outer = outer_curly_brace_block (fndecl))
11142 && chain_member (r, BLOCK_VARS (outer)))
11143 finalize_nrv (&DECL_SAVED_TREE (fndecl), r, DECL_RESULT (fndecl));
11145 current_function_return_value = NULL_TREE;
11148 /* Remember that we were in class scope. */
11149 if (current_class_name)
11150 ctype = current_class_type;
11152 /* Must mark the RESULT_DECL as being in this function. */
11153 DECL_CONTEXT (DECL_RESULT (fndecl)) = fndecl;
11155 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
11156 to the FUNCTION_DECL node itself. */
11157 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl)) = fndecl;
11159 /* Save away current state, if appropriate. */
11160 if (!processing_template_decl)
11161 save_function_data (fndecl);
11163 /* Complain if there's just no return statement. */
11164 if (warn_return_type
11165 && TREE_CODE (TREE_TYPE (fntype)) != VOID_TYPE
11166 && !dependent_type_p (TREE_TYPE (fntype))
11167 && !current_function_returns_value && !current_function_returns_null
11168 /* Don't complain if we abort or throw. */
11169 && !current_function_returns_abnormally
11170 && !DECL_NAME (DECL_RESULT (fndecl))
11171 /* Normally, with -Wreturn-type, flow will complain. Unless we're an
11172 inline function, as we might never be compiled separately. */
11173 && (DECL_INLINE (fndecl) || processing_template_decl)
11174 /* Structor return values (if any) are set by the compiler. */
11175 && !DECL_CONSTRUCTOR_P (fndecl)
11176 && !DECL_DESTRUCTOR_P (fndecl))
11177 warning (OPT_Wreturn_type, "no return statement in function returning non-void");
11179 /* Store the end of the function, so that we get good line number
11180 info for the epilogue. */
11181 cfun->function_end_locus = input_location;
11183 /* Genericize before inlining. */
11184 if (!processing_template_decl)
11186 struct language_function *f = DECL_SAVED_FUNCTION_DATA (fndecl);
11187 cp_genericize (fndecl);
11188 /* Clear out the bits we don't need. */
11189 f->x_current_class_ptr = NULL;
11190 f->x_current_class_ref = NULL;
11191 f->x_eh_spec_block = NULL;
11192 f->x_in_charge_parm = NULL;
11193 f->x_vtt_parm = NULL;
11194 f->x_return_value = NULL;
11195 f->bindings = NULL;
11196 f->extern_decl_map = NULL;
11198 /* Handle attribute((warn_unused_result)). Relies on gimple input. */
11199 c_warn_unused_result (&DECL_SAVED_TREE (fndecl));
11201 /* Clear out the bits we don't need. */
11202 local_names = NULL;
11204 /* We're leaving the context of this function, so zap cfun. It's still in
11205 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
11207 current_function_decl = NULL;
11209 /* If this is an in-class inline definition, we may have to pop the
11210 bindings for the template parameters that we added in
11211 maybe_begin_member_template_processing when start_function was
11213 if (inclass_inline)
11214 maybe_end_member_template_processing ();
11216 /* Leave the scope of the class. */
11218 pop_nested_class ();
11224 /* Let the error reporting routines know that we're outside a
11225 function. For a nested function, this value is used in
11226 cxx_pop_function_context and then reset via pop_function_context. */
11227 current_function_decl = NULL_TREE;
11232 /* Create the FUNCTION_DECL for a function definition.
11233 DECLSPECS and DECLARATOR are the parts of the declaration;
11234 they describe the return type and the name of the function,
11235 but twisted together in a fashion that parallels the syntax of C.
11237 This function creates a binding context for the function body
11238 as well as setting up the FUNCTION_DECL in current_function_decl.
11240 Returns a FUNCTION_DECL on success.
11242 If the DECLARATOR is not suitable for a function (it defines a datum
11243 instead), we return 0, which tells yyparse to report a parse error.
11245 May return void_type_node indicating that this method is actually
11246 a friend. See grokfield for more details.
11248 Came here with a `.pushlevel' .
11250 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
11251 CHANGES TO CODE IN `grokfield'. */
11254 start_method (cp_decl_specifier_seq *declspecs,
11255 const cp_declarator *declarator, tree attrlist)
11257 tree fndecl = grokdeclarator (declarator, declspecs, MEMFUNCDEF, 0,
11260 if (fndecl == error_mark_node)
11261 return error_mark_node;
11263 if (fndecl == NULL || TREE_CODE (fndecl) != FUNCTION_DECL)
11265 error ("invalid member function declaration");
11266 return error_mark_node;
11270 cplus_decl_attributes (&fndecl, attrlist, 0);
11272 /* Pass friends other than inline friend functions back. */
11273 if (fndecl == void_type_node)
11276 if (DECL_IN_AGGR_P (fndecl))
11278 if (DECL_CONTEXT (fndecl)
11279 && TREE_CODE (DECL_CONTEXT (fndecl)) != NAMESPACE_DECL)
11280 error ("%qD is already defined in class %qT", fndecl,
11281 DECL_CONTEXT (fndecl));
11282 return error_mark_node;
11285 check_template_shadow (fndecl);
11287 DECL_DECLARED_INLINE_P (fndecl) = 1;
11288 if (flag_default_inline)
11289 DECL_INLINE (fndecl) = 1;
11291 /* We process method specializations in finish_struct_1. */
11292 if (processing_template_decl && !DECL_TEMPLATE_SPECIALIZATION (fndecl))
11294 fndecl = push_template_decl (fndecl);
11295 if (fndecl == error_mark_node)
11299 if (! DECL_FRIEND_P (fndecl))
11301 if (TREE_CHAIN (fndecl))
11303 fndecl = copy_node (fndecl);
11304 TREE_CHAIN (fndecl) = NULL_TREE;
11308 finish_decl (fndecl, NULL_TREE, NULL_TREE);
11310 /* Make a place for the parms. */
11311 begin_scope (sk_function_parms, fndecl);
11313 DECL_IN_AGGR_P (fndecl) = 1;
11317 /* Go through the motions of finishing a function definition.
11318 We don't compile this method until after the whole class has
11321 FINISH_METHOD must return something that looks as though it
11322 came from GROKFIELD (since we are defining a method, after all).
11324 This is called after parsing the body of the function definition.
11325 STMTS is the chain of statements that makes up the function body.
11327 DECL is the ..._DECL that `start_method' provided. */
11330 finish_method (tree decl)
11332 tree fndecl = decl;
11337 if (decl == void_type_node)
11340 old_initial = DECL_INITIAL (fndecl);
11342 /* Undo the level for the parms (from start_method).
11343 This is like poplevel, but it causes nothing to be
11344 saved. Saving information here confuses symbol-table
11345 output routines. Besides, this information will
11346 be correctly output when this method is actually
11349 /* Clear out the meanings of the local variables of this level;
11350 also record in each decl which block it belongs to. */
11352 for (link = current_binding_level->names; link; link = TREE_CHAIN (link))
11354 if (DECL_NAME (link) != NULL_TREE)
11355 pop_binding (DECL_NAME (link), link);
11356 gcc_assert (TREE_CODE (link) != FUNCTION_DECL);
11357 DECL_CONTEXT (link) = NULL_TREE;
11360 poplevel (0, 0, 0);
11362 DECL_INITIAL (fndecl) = old_initial;
11364 /* We used to check if the context of FNDECL was different from
11365 current_class_type as another way to get inside here. This didn't work
11366 for String.cc in libg++. */
11367 if (DECL_FRIEND_P (fndecl))
11369 VEC_safe_push (tree, gc, CLASSTYPE_INLINE_FRIENDS (current_class_type),
11371 decl = void_type_node;
11378 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
11379 we can lay it out later, when and if its type becomes complete. */
11382 maybe_register_incomplete_var (tree var)
11384 gcc_assert (TREE_CODE (var) == VAR_DECL);
11386 /* Keep track of variables with incomplete types. */
11387 if (!processing_template_decl && TREE_TYPE (var) != error_mark_node
11388 && DECL_EXTERNAL (var))
11390 tree inner_type = TREE_TYPE (var);
11392 while (TREE_CODE (inner_type) == ARRAY_TYPE)
11393 inner_type = TREE_TYPE (inner_type);
11394 inner_type = TYPE_MAIN_VARIANT (inner_type);
11396 if ((!COMPLETE_TYPE_P (inner_type) && CLASS_TYPE_P (inner_type))
11397 /* RTTI TD entries are created while defining the type_info. */
11398 || (TYPE_LANG_SPECIFIC (inner_type)
11399 && TYPE_BEING_DEFINED (inner_type)))
11400 incomplete_vars = tree_cons (inner_type, var, incomplete_vars);
11404 /* Called when a class type (given by TYPE) is defined. If there are
11405 any existing VAR_DECLs whose type hsa been completed by this
11406 declaration, update them now. */
11409 complete_vars (tree type)
11411 tree *list = &incomplete_vars;
11413 gcc_assert (CLASS_TYPE_P (type));
11416 if (same_type_p (type, TREE_PURPOSE (*list)))
11418 tree var = TREE_VALUE (*list);
11419 tree type = TREE_TYPE (var);
11420 /* Complete the type of the variable. The VAR_DECL itself
11421 will be laid out in expand_expr. */
11422 complete_type (type);
11423 cp_apply_type_quals_to_decl (cp_type_quals (type), var);
11424 /* Remove this entry from the list. */
11425 *list = TREE_CHAIN (*list);
11428 list = &TREE_CHAIN (*list);
11431 /* Check for pending declarations which may have abstract type. */
11432 complete_type_check_abstract (type);
11435 /* If DECL is of a type which needs a cleanup, build that cleanup
11439 cxx_maybe_build_cleanup (tree decl)
11441 tree type = TREE_TYPE (decl);
11443 if (type != error_mark_node && TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
11445 int flags = LOOKUP_NORMAL|LOOKUP_DESTRUCTOR;
11447 bool has_vbases = (TREE_CODE (type) == RECORD_TYPE
11448 && CLASSTYPE_VBASECLASSES (type));
11450 if (TREE_CODE (type) == ARRAY_TYPE)
11454 cxx_mark_addressable (decl);
11455 rval = build_unary_op (ADDR_EXPR, decl, 0);
11458 /* Optimize for space over speed here. */
11459 if (!has_vbases || flag_expensive_optimizations)
11460 flags |= LOOKUP_NONVIRTUAL;
11462 rval = build_delete (TREE_TYPE (rval), rval,
11463 sfk_complete_destructor, flags, 0);
11470 /* When a stmt has been parsed, this function is called. */
11477 /* DECL was originally constructed as a non-static member function,
11478 but turned out to be static. Update it accordingly. */
11481 revert_static_member_fn (tree decl)
11484 tree function = TREE_TYPE (decl);
11485 tree args = TYPE_ARG_TYPES (function);
11487 if (cp_type_quals (TREE_TYPE (TREE_VALUE (args)))
11488 != TYPE_UNQUALIFIED)
11489 error ("static member function %q#D declared with type qualifiers", decl);
11491 args = TREE_CHAIN (args);
11492 tmp = build_function_type (TREE_TYPE (function), args);
11493 tmp = build_qualified_type (tmp, cp_type_quals (function));
11494 tmp = build_exception_variant (tmp,
11495 TYPE_RAISES_EXCEPTIONS (function));
11496 TREE_TYPE (decl) = tmp;
11497 if (DECL_ARGUMENTS (decl))
11498 DECL_ARGUMENTS (decl) = TREE_CHAIN (DECL_ARGUMENTS (decl));
11499 DECL_STATIC_FUNCTION_P (decl) = 1;
11502 /* Initialize the variables used during compilation of a C++
11506 cxx_push_function_context (struct function * f)
11508 struct language_function *p = GGC_CNEW (struct language_function);
11511 /* Whenever we start a new function, we destroy temporaries in the
11513 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
11519 if (DECL_SAVED_FUNCTION_DATA (fn))
11521 /* If we already parsed this function, and we're just expanding it
11522 now, restore saved state. */
11523 *cp_function_chain = *DECL_SAVED_FUNCTION_DATA (fn);
11525 /* We don't need the saved data anymore. Unless this is an inline
11526 function; we need the named return value info for
11527 declare_return_variable. */
11528 if (! DECL_INLINE (fn))
11529 DECL_SAVED_FUNCTION_DATA (fn) = NULL;
11534 /* Free the language-specific parts of F, now that we've finished
11535 compiling the function. */
11538 cxx_pop_function_context (struct function * f)
11543 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
11544 one of the language-independent trees. */
11546 enum cp_tree_node_structure_enum
11547 cp_tree_node_structure (union lang_tree_node * t)
11549 switch (TREE_CODE (&t->generic))
11551 case DEFAULT_ARG: return TS_CP_DEFAULT_ARG;
11552 case IDENTIFIER_NODE: return TS_CP_IDENTIFIER;
11553 case OVERLOAD: return TS_CP_OVERLOAD;
11554 case TEMPLATE_PARM_INDEX: return TS_CP_TPI;
11555 case TINST_LEVEL: return TS_CP_TINST_LEVEL;
11556 case PTRMEM_CST: return TS_CP_PTRMEM;
11557 case BASELINK: return TS_CP_BASELINK;
11558 default: return TS_CP_GENERIC;
11562 /* Build the void_list_node (void_type_node having been created). */
11564 build_void_list_node (void)
11566 tree t = build_tree_list (NULL_TREE, void_type_node);
11571 cp_missing_noreturn_ok_p (tree decl)
11573 /* A missing noreturn is ok for the `main' function. */
11574 return DECL_MAIN_P (decl);
11577 /* Return the COMDAT group into which DECL should be placed. */
11580 cxx_comdat_group (tree decl)
11584 /* Virtual tables, construction virtual tables, and virtual table
11585 tables all go in a single COMDAT group, named after the primary
11587 if (TREE_CODE (decl) == VAR_DECL && DECL_VTABLE_OR_VTT_P (decl))
11588 name = DECL_ASSEMBLER_NAME (CLASSTYPE_VTABLES (DECL_CONTEXT (decl)));
11589 /* For all other DECLs, the COMDAT group is the mangled name of the
11590 declaration itself. */
11593 while (DECL_THUNK_P (decl))
11595 /* If TARGET_USE_LOCAL_THUNK_ALIAS_P, use_thunk puts the thunk
11596 into the same section as the target function. In that case
11597 we must return target's name. */
11598 tree target = THUNK_TARGET (decl);
11599 if (TARGET_USE_LOCAL_THUNK_ALIAS_P (target)
11600 && DECL_SECTION_NAME (target) != NULL
11601 && DECL_ONE_ONLY (target))
11606 name = DECL_ASSEMBLER_NAME (decl);
11609 return IDENTIFIER_POINTER (name);
11612 #include "gt-cp-decl.h"