1 /* Process declarations and variables for C++ compiler.
2 Copyright (C) 1988, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
3 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
4 Free Software Foundation, Inc.
5 Contributed by Michael Tiemann (tiemann@cygnus.com)
7 This file is part of GCC.
9 GCC is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3, or (at your option)
14 GCC is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with GCC; see the file COPYING3. If not see
21 <http://www.gnu.org/licenses/>. */
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"
51 #include "diagnostic.h"
55 #include "tree-flow.h"
56 #include "pointer-set.h"
59 static tree grokparms (tree parmlist, tree *);
60 static const char *redeclaration_error_message (tree, tree);
62 static int decl_jump_unsafe (tree);
63 static void require_complete_types_for_parms (tree);
64 static int ambi_op_p (enum tree_code);
65 static int unary_op_p (enum tree_code);
66 static void push_local_name (tree);
67 static tree grok_reference_init (tree, tree, tree, tree *);
68 static tree grokvardecl (tree, tree, const cp_decl_specifier_seq *,
70 static void record_unknown_type (tree, const char *);
71 static tree builtin_function_1 (tree, tree, bool);
72 static tree build_library_fn_1 (tree, enum tree_code, tree);
73 static int member_function_or_else (tree, tree, enum overload_flags);
74 static void bad_specifiers (tree, const char *, int, int, int, int,
76 static void check_for_uninitialized_const_var (tree);
77 static hashval_t typename_hash (const void *);
78 static int typename_compare (const void *, const void *);
79 static tree local_variable_p_walkfn (tree *, int *, void *);
80 static tree record_builtin_java_type (const char *, int);
81 static const char *tag_name (enum tag_types);
82 static tree lookup_and_check_tag (enum tag_types, tree, tag_scope, bool);
83 static int walk_namespaces_r (tree, walk_namespaces_fn, void *);
84 static void maybe_deduce_size_from_array_init (tree, tree);
85 static void layout_var_decl (tree);
86 static tree check_initializer (tree, tree, int, tree *);
87 static void make_rtl_for_nonlocal_decl (tree, tree, const char *);
88 static void save_function_data (tree);
89 static void check_function_type (tree, tree);
90 static void finish_constructor_body (void);
91 static void begin_destructor_body (void);
92 static void finish_destructor_body (void);
93 static tree create_array_type_for_decl (tree, tree, tree);
94 static tree get_atexit_node (void);
95 static tree get_dso_handle_node (void);
96 static tree start_cleanup_fn (void);
97 static void end_cleanup_fn (void);
98 static tree cp_make_fname_decl (location_t, tree, int);
99 static void initialize_predefined_identifiers (void);
100 static tree check_special_function_return_type
101 (special_function_kind, tree, tree);
102 static tree push_cp_library_fn (enum tree_code, tree);
103 static tree build_cp_library_fn (tree, enum tree_code, tree);
104 static void store_parm_decls (tree);
105 static void initialize_local_var (tree, tree);
106 static void expand_static_init (tree, tree);
107 static tree next_initializable_field (tree);
109 /* The following symbols are subsumed in the cp_global_trees array, and
110 listed here individually for documentation purposes.
113 tree wchar_decl_node;
115 tree vtable_entry_type;
116 tree delta_type_node;
117 tree __t_desc_type_node;
119 tree class_type_node;
120 tree unknown_type_node;
122 Array type `vtable_entry_type[]'
125 tree vtbl_ptr_type_node;
132 A FUNCTION_DECL which can call `abort'. Not necessarily the
133 one that the user will declare, but sufficient to be called
134 by routines that want to abort the program.
138 The FUNCTION_DECL for the default `::operator delete'.
140 tree global_delete_fndecl;
143 tree type_info_type_node, tinfo_decl_id, tinfo_decl_type;
144 tree tinfo_var_id; */
146 tree cp_global_trees[CPTI_MAX];
148 /* Indicates that there is a type value in some namespace, although
149 that is not necessarily in scope at the moment. */
151 tree global_type_node;
153 /* The node that holds the "name" of the global scope. */
154 tree global_scope_name;
156 #define local_names cp_function_chain->x_local_names
158 /* A list of objects which have constructors or destructors
159 which reside in the global scope. The decl is stored in
160 the TREE_VALUE slot and the initializer is stored
161 in the TREE_PURPOSE slot. */
162 tree static_aggregates;
166 /* A node for the integer constants 2, and 3. */
168 tree integer_two_node, integer_three_node;
170 /* Used only for jumps to as-yet undefined labels, since jumps to
171 defined labels can have their validity checked immediately. */
173 struct GTY(()) named_label_use_entry {
174 struct named_label_use_entry *next;
175 /* The binding level to which this entry is *currently* attached.
176 This is initially the binding level in which the goto appeared,
177 but is modified as scopes are closed. */
178 struct cp_binding_level *binding_level;
179 /* The head of the names list that was current when the goto appeared,
180 or the inner scope popped. These are the decls that will *not* be
181 skipped when jumping to the label. */
183 /* The location of the goto, for error reporting. */
184 location_t o_goto_locus;
185 /* True if an OpenMP structured block scope has been closed since
186 the goto appeared. This means that the branch from the label will
187 illegally exit an OpenMP scope. */
191 /* A list of all LABEL_DECLs in the function that have names. Here so
192 we can clear out their names' definitions at the end of the
193 function, and so we can check the validity of jumps to these labels. */
195 struct GTY(()) named_label_entry {
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 /* To avoid unwanted recursion, finish_function defers all mark_used calls
230 encountered during its execution until it finishes. */
231 bool defer_mark_used_calls;
232 VEC(tree, gc) *deferred_mark_used_calls;
234 /* States indicating how grokdeclarator() should handle declspecs marked
235 with __attribute__((deprecated)). An object declared as
236 __attribute__((deprecated)) suppresses warnings of uses of other
238 enum deprecated_states deprecated_state = DEPRECATED_NORMAL;
241 /* A TREE_LIST of VAR_DECLs. The TREE_PURPOSE is a RECORD_TYPE or
242 UNION_TYPE; the TREE_VALUE is a VAR_DECL with that type. At the
243 time the VAR_DECL was declared, the type was incomplete. */
245 static GTY(()) tree incomplete_vars;
247 /* Returns the kind of template specialization we are currently
248 processing, given that it's declaration contained N_CLASS_SCOPES
249 explicit scope qualifications. */
252 current_tmpl_spec_kind (int n_class_scopes)
254 int n_template_parm_scopes = 0;
255 int seen_specialization_p = 0;
256 int innermost_specialization_p = 0;
257 struct cp_binding_level *b;
259 /* Scan through the template parameter scopes. */
260 for (b = current_binding_level;
261 b->kind == sk_template_parms;
264 /* If we see a specialization scope inside a parameter scope,
265 then something is wrong. That corresponds to a declaration
268 template <class T> template <> ...
270 which is always invalid since [temp.expl.spec] forbids the
271 specialization of a class member template if the enclosing
272 class templates are not explicitly specialized as well. */
273 if (b->explicit_spec_p)
275 if (n_template_parm_scopes == 0)
276 innermost_specialization_p = 1;
278 seen_specialization_p = 1;
280 else if (seen_specialization_p == 1)
281 return tsk_invalid_member_spec;
283 ++n_template_parm_scopes;
286 /* Handle explicit instantiations. */
287 if (processing_explicit_instantiation)
289 if (n_template_parm_scopes != 0)
290 /* We've seen a template parameter list during an explicit
291 instantiation. For example:
293 template <class T> template void f(int);
295 This is erroneous. */
296 return tsk_invalid_expl_inst;
298 return tsk_expl_inst;
301 if (n_template_parm_scopes < n_class_scopes)
302 /* We've not seen enough template headers to match all the
303 specialized classes present. For example:
305 template <class T> void R<T>::S<T>::f(int);
307 This is invalid; there needs to be one set of template
308 parameters for each class. */
309 return tsk_insufficient_parms;
310 else if (n_template_parm_scopes == n_class_scopes)
311 /* We're processing a non-template declaration (even though it may
312 be a member of a template class.) For example:
314 template <class T> void S<T>::f(int);
316 The `class T' matches the `S<T>', leaving no template headers
317 corresponding to the `f'. */
319 else if (n_template_parm_scopes > n_class_scopes + 1)
320 /* We've got too many template headers. For example:
322 template <> template <class T> void f (T);
324 There need to be more enclosing classes. */
325 return tsk_excessive_parms;
327 /* This must be a template. It's of the form:
329 template <class T> template <class U> void S<T>::f(U);
331 This is a specialization if the innermost level was a
332 specialization; otherwise it's just a definition of the
334 return innermost_specialization_p ? tsk_expl_spec : tsk_template;
337 /* Exit the current scope. */
345 /* When a label goes out of scope, check to see if that label was used
346 in a valid manner, and issue any appropriate warnings or errors. */
349 pop_label (tree label, tree old_value)
351 if (!processing_template_decl)
353 if (DECL_INITIAL (label) == NULL_TREE)
357 error ("label %q+D used but not defined", label);
358 location = input_location; /* FIXME want (input_filename, (line)0) */
359 /* Avoid crashing later. */
360 define_label (location, DECL_NAME (label));
363 warn_for_unused_label (label);
366 SET_IDENTIFIER_LABEL_VALUE (DECL_NAME (label), old_value);
369 /* At the end of a function, all labels declared within the function
370 go out of scope. BLOCK is the top-level block for the
374 pop_labels_1 (void **slot, void *data)
376 struct named_label_entry *ent = (struct named_label_entry *) *slot;
377 tree block = (tree) data;
379 pop_label (ent->label_decl, NULL_TREE);
381 /* Put the labels into the "variables" of the top-level block,
382 so debugger can see them. */
383 TREE_CHAIN (ent->label_decl) = BLOCK_VARS (block);
384 BLOCK_VARS (block) = ent->label_decl;
386 htab_clear_slot (named_labels, slot);
392 pop_labels (tree block)
396 htab_traverse (named_labels, pop_labels_1, block);
401 /* At the end of a block with local labels, restore the outer definition. */
404 pop_local_label (tree label, tree old_value)
406 struct named_label_entry dummy;
409 pop_label (label, old_value);
411 dummy.label_decl = label;
412 slot = htab_find_slot (named_labels, &dummy, NO_INSERT);
413 htab_clear_slot (named_labels, slot);
416 /* The following two routines are used to interface to Objective-C++.
417 The binding level is purposely treated as an opaque type. */
420 objc_get_current_scope (void)
422 return current_binding_level;
425 /* The following routine is used by the NeXT-style SJLJ exceptions;
426 variables get marked 'volatile' so as to not be clobbered by
427 _setjmp()/_longjmp() calls. All variables in the current scope,
428 as well as parent scopes up to (but not including) ENCLOSING_BLK
429 shall be thusly marked. */
432 objc_mark_locals_volatile (void *enclosing_blk)
434 struct cp_binding_level *scope;
436 for (scope = current_binding_level;
437 scope && scope != enclosing_blk;
438 scope = scope->level_chain)
442 for (decl = scope->names; decl; decl = TREE_CHAIN (decl))
443 objc_volatilize_decl (decl);
445 /* Do not climb up past the current function. */
446 if (scope->kind == sk_function_parms)
451 /* Update data for defined and undefined labels when leaving a scope. */
454 poplevel_named_label_1 (void **slot, void *data)
456 struct named_label_entry *ent = (struct named_label_entry *) *slot;
457 struct cp_binding_level *bl = (struct cp_binding_level *) data;
458 struct cp_binding_level *obl = bl->level_chain;
460 if (ent->binding_level == bl)
464 for (decl = ent->names_in_scope; decl; decl = TREE_CHAIN (decl))
465 if (decl_jump_unsafe (decl))
466 ent->bad_decls = tree_cons (NULL, decl, ent->bad_decls);
468 ent->binding_level = obl;
469 ent->names_in_scope = obl->names;
473 ent->in_try_scope = true;
476 ent->in_catch_scope = true;
479 ent->in_omp_scope = true;
487 struct named_label_use_entry *use;
489 for (use = ent->uses; use ; use = use->next)
490 if (use->binding_level == bl)
492 use->binding_level = obl;
493 use->names_in_scope = obl->names;
494 if (bl->kind == sk_omp)
495 use->in_omp_scope = true;
502 /* Exit a binding level.
503 Pop the level off, and restore the state of the identifier-decl mappings
504 that were in effect when this level was entered.
506 If KEEP == 1, this level had explicit declarations, so
507 and create a "block" (a BLOCK node) for the level
508 to record its declarations and subblocks for symbol table output.
510 If FUNCTIONBODY is nonzero, this level is the body of a function,
511 so create a block as if KEEP were set and also clear out all
514 If REVERSE is nonzero, reverse the order of decls before putting
515 them into the BLOCK. */
518 poplevel (int keep, int reverse, int functionbody)
521 /* The chain of decls was accumulated in reverse order.
522 Put it into forward order, just for cleanliness. */
527 int leaving_for_scope;
530 timevar_push (TV_NAME_LOOKUP);
535 gcc_assert (current_binding_level->kind != sk_class);
537 if (current_binding_level->kind == sk_cleanup)
539 subblocks = functionbody >= 0 ? current_binding_level->blocks : 0;
541 gcc_assert (!VEC_length(cp_class_binding,
542 current_binding_level->class_shadowed));
544 /* We used to use KEEP == 2 to indicate that the new block should go
545 at the beginning of the list of blocks at this binding level,
546 rather than the end. This hack is no longer used. */
547 gcc_assert (keep == 0 || keep == 1);
549 if (current_binding_level->keep)
552 /* Any uses of undefined labels, and any defined labels, now operate
553 under constraints of next binding contour. */
554 if (cfun && !functionbody && named_labels)
555 htab_traverse (named_labels, poplevel_named_label_1,
556 current_binding_level);
558 /* Get the decls in the order they were written.
559 Usually current_binding_level->names is in reverse order.
560 But parameter decls were previously put in forward order. */
563 current_binding_level->names
564 = decls = nreverse (current_binding_level->names);
566 decls = current_binding_level->names;
568 /* If there were any declarations or structure tags in that level,
569 or if this level is a function body,
570 create a BLOCK to record them for the life of this function. */
572 if (keep == 1 || functionbody)
573 block = make_node (BLOCK);
574 if (block != NULL_TREE)
576 BLOCK_VARS (block) = decls;
577 BLOCK_SUBBLOCKS (block) = subblocks;
580 /* In each subblock, record that this is its superior. */
582 for (link = subblocks; link; link = BLOCK_CHAIN (link))
583 BLOCK_SUPERCONTEXT (link) = block;
585 /* We still support the old for-scope rules, whereby the variables
586 in a for-init statement were in scope after the for-statement
587 ended. We only use the new rules if flag_new_for_scope is
590 = current_binding_level->kind == sk_for && flag_new_for_scope == 1;
592 /* Before we remove the declarations first check for unused variables. */
593 if (warn_unused_variable
594 && !processing_template_decl)
595 for (decl = getdecls (); decl; decl = TREE_CHAIN (decl))
596 if (TREE_CODE (decl) == VAR_DECL
597 && ! TREE_USED (decl)
598 && ! DECL_IN_SYSTEM_HEADER (decl)
599 && DECL_NAME (decl) && ! DECL_ARTIFICIAL (decl))
600 warning (OPT_Wunused_variable, "unused variable %q+D", decl);
602 /* Remove declarations for all the DECLs in this level. */
603 for (link = decls; link; link = TREE_CHAIN (link))
605 if (leaving_for_scope && TREE_CODE (link) == VAR_DECL
608 tree name = DECL_NAME (link);
612 ob = outer_binding (name,
613 IDENTIFIER_BINDING (name),
616 ns_binding = IDENTIFIER_NAMESPACE_VALUE (name);
618 ns_binding = NULL_TREE;
620 if (ob && ob->scope == current_binding_level->level_chain)
621 /* We have something like:
626 and we are leaving the `for' scope. There's no reason to
627 keep the binding of the inner `i' in this case. */
628 pop_binding (name, link);
629 else if ((ob && (TREE_CODE (ob->value) == TYPE_DECL))
630 || (ns_binding && TREE_CODE (ns_binding) == TYPE_DECL))
631 /* Here, we have something like:
639 We must pop the for-scope binding so we know what's a
640 type and what isn't. */
641 pop_binding (name, link);
644 /* Mark this VAR_DECL as dead so that we can tell we left it
645 there only for backward compatibility. */
646 DECL_DEAD_FOR_LOCAL (link) = 1;
648 /* Keep track of what should have happened when we
649 popped the binding. */
652 SET_DECL_SHADOWED_FOR_VAR (link, ob->value);
653 DECL_HAS_SHADOWED_FOR_VAR_P (link) = 1;
656 /* Add it to the list of dead variables in the next
657 outermost binding to that we can remove these when we
658 leave that binding. */
659 current_binding_level->level_chain->dead_vars_from_for
660 = tree_cons (NULL_TREE, link,
661 current_binding_level->level_chain->
664 /* Although we don't pop the cxx_binding, we do clear
665 its SCOPE since the scope is going away now. */
666 IDENTIFIER_BINDING (name)->scope
667 = current_binding_level->level_chain;
674 /* Remove the binding. */
677 if (TREE_CODE (decl) == TREE_LIST)
678 decl = TREE_VALUE (decl);
681 if (TREE_CODE (name) == OVERLOAD)
682 name = OVL_FUNCTION (name);
684 gcc_assert (DECL_P (name));
685 pop_binding (DECL_NAME (name), decl);
689 /* Remove declarations for any `for' variables from inner scopes
690 that we kept around. */
691 for (link = current_binding_level->dead_vars_from_for;
692 link; link = TREE_CHAIN (link))
693 pop_binding (DECL_NAME (TREE_VALUE (link)), TREE_VALUE (link));
695 /* Restore the IDENTIFIER_TYPE_VALUEs. */
696 for (link = current_binding_level->type_shadowed;
697 link; link = TREE_CHAIN (link))
698 SET_IDENTIFIER_TYPE_VALUE (TREE_PURPOSE (link), TREE_VALUE (link));
700 /* Restore the IDENTIFIER_LABEL_VALUEs for local labels. */
701 for (link = current_binding_level->shadowed_labels;
703 link = TREE_CHAIN (link))
704 pop_local_label (TREE_VALUE (link), TREE_PURPOSE (link));
706 /* There may be OVERLOADs (wrapped in TREE_LISTs) on the BLOCK_VARs
707 list if a `using' declaration put them there. The debugging
708 back ends won't understand OVERLOAD, so we remove them here.
709 Because the BLOCK_VARS are (temporarily) shared with
710 CURRENT_BINDING_LEVEL->NAMES we must do this fixup after we have
711 popped all the bindings. */
716 for (d = &BLOCK_VARS (block); *d; )
718 if (TREE_CODE (*d) == TREE_LIST)
719 *d = TREE_CHAIN (*d);
721 d = &TREE_CHAIN (*d);
725 /* If the level being exited is the top level of a function,
726 check over all the labels. */
729 /* Since this is the top level block of a function, the vars are
730 the function's parameters. Don't leave them in the BLOCK
731 because they are found in the FUNCTION_DECL instead. */
732 BLOCK_VARS (block) = 0;
736 kind = current_binding_level->kind;
737 if (kind == sk_cleanup)
741 /* If this is a temporary binding created for a cleanup, then we'll
742 have pushed a statement list level. Pop that, create a new
743 BIND_EXPR for the block, and insert it into the stream. */
744 stmt = pop_stmt_list (current_binding_level->statement_list);
745 stmt = c_build_bind_expr (input_location, block, stmt);
752 /* The current function is being defined, so its DECL_INITIAL
753 should be error_mark_node. */
754 gcc_assert (DECL_INITIAL (current_function_decl) == error_mark_node);
755 DECL_INITIAL (current_function_decl) = block;
758 current_binding_level->blocks
759 = chainon (current_binding_level->blocks, block);
761 /* If we did not make a block for the level just exited,
762 any blocks made for inner levels
763 (since they cannot be recorded as subblocks in that level)
764 must be carried forward so they will later become subblocks
765 of something else. */
767 current_binding_level->blocks
768 = chainon (current_binding_level->blocks, subblocks);
770 /* Each and every BLOCK node created here in `poplevel' is important
771 (e.g. for proper debugging information) so if we created one
772 earlier, mark it as "used". */
774 TREE_USED (block) = 1;
776 /* All temporary bindings created for cleanups are popped silently. */
777 if (kind == sk_cleanup)
780 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, block);
783 /* Walk all the namespaces contained NAMESPACE, including NAMESPACE
784 itself, calling F for each. The DATA is passed to F as well. */
787 walk_namespaces_r (tree name_space, walk_namespaces_fn f, void* data)
790 tree current = NAMESPACE_LEVEL (name_space)->namespaces;
792 result |= (*f) (name_space, data);
794 for (; current; current = TREE_CHAIN (current))
795 result |= walk_namespaces_r (current, f, data);
800 /* Walk all the namespaces, calling F for each. The DATA is passed to
804 walk_namespaces (walk_namespaces_fn f, void* data)
806 return walk_namespaces_r (global_namespace, f, data);
809 /* Call wrapup_globals_declarations for the globals in NAMESPACE. If
810 DATA is non-NULL, this is the last time we will call
811 wrapup_global_declarations for this NAMESPACE. */
814 wrapup_globals_for_namespace (tree name_space, void* data)
816 struct cp_binding_level *level = NAMESPACE_LEVEL (name_space);
817 VEC(tree,gc) *statics = level->static_decls;
818 tree *vec = VEC_address (tree, statics);
819 int len = VEC_length (tree, statics);
820 int last_time = (data != 0);
824 check_global_declarations (vec, len);
825 emit_debug_global_declarations (vec, len);
829 /* Write out any globals that need to be output. */
830 return wrapup_global_declarations (vec, len);
834 /* In C++, you don't have to write `struct S' to refer to `S'; you
835 can just use `S'. We accomplish this by creating a TYPE_DECL as
836 if the user had written `typedef struct S S'. Create and return
837 the TYPE_DECL for TYPE. */
840 create_implicit_typedef (tree name, tree type)
844 decl = build_decl (input_location, TYPE_DECL, name, type);
845 DECL_ARTIFICIAL (decl) = 1;
846 /* There are other implicit type declarations, like the one *within*
847 a class that allows you to write `S::S'. We must distinguish
849 SET_DECL_IMPLICIT_TYPEDEF_P (decl);
850 TYPE_NAME (type) = decl;
851 TYPE_STUB_DECL (type) = decl;
856 /* Remember a local name for name-mangling purposes. */
859 push_local_name (tree decl)
864 timevar_push (TV_NAME_LOOKUP);
866 name = DECL_NAME (decl);
868 nelts = VEC_length (tree, local_names);
869 for (i = 0; i < nelts; i++)
871 t = VEC_index (tree, local_names, i);
872 if (DECL_NAME (t) == name)
874 if (!DECL_LANG_SPECIFIC (decl))
875 retrofit_lang_decl (decl);
876 DECL_LANG_SPECIFIC (decl)->u.base.u2sel = 1;
877 if (DECL_LANG_SPECIFIC (t))
878 DECL_DISCRIMINATOR (decl) = DECL_DISCRIMINATOR (t) + 1;
880 DECL_DISCRIMINATOR (decl) = 1;
882 VEC_replace (tree, local_names, i, decl);
883 timevar_pop (TV_NAME_LOOKUP);
888 VEC_safe_push (tree, gc, local_names, decl);
889 timevar_pop (TV_NAME_LOOKUP);
892 /* Subroutine of duplicate_decls: return truthvalue of whether
893 or not types of these decls match.
895 For C++, we must compare the parameter list so that `int' can match
896 `int&' in a parameter position, but `int&' is not confused with
900 decls_match (tree newdecl, tree olddecl)
904 if (newdecl == olddecl)
907 if (TREE_CODE (newdecl) != TREE_CODE (olddecl))
908 /* If the two DECLs are not even the same kind of thing, we're not
909 interested in their types. */
912 if (TREE_CODE (newdecl) == FUNCTION_DECL)
914 tree f1 = TREE_TYPE (newdecl);
915 tree f2 = TREE_TYPE (olddecl);
916 tree p1 = TYPE_ARG_TYPES (f1);
917 tree p2 = TYPE_ARG_TYPES (f2);
919 /* Specializations of different templates are different functions
920 even if they have the same type. */
921 tree t1 = (DECL_USE_TEMPLATE (newdecl)
922 ? DECL_TI_TEMPLATE (newdecl)
924 tree t2 = (DECL_USE_TEMPLATE (olddecl)
925 ? DECL_TI_TEMPLATE (olddecl)
930 if (CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl)
931 && ! (DECL_EXTERN_C_P (newdecl)
932 && DECL_EXTERN_C_P (olddecl)))
935 #ifdef NO_IMPLICIT_EXTERN_C
936 /* A new declaration doesn't match a built-in one unless it
937 is also extern "C". */
938 if (DECL_IS_BUILTIN (olddecl)
939 && DECL_EXTERN_C_P (olddecl) && !DECL_EXTERN_C_P (newdecl))
943 if (TREE_CODE (f1) != TREE_CODE (f2))
946 if (same_type_p (TREE_TYPE (f1), TREE_TYPE (f2)))
948 if (p2 == NULL_TREE && DECL_EXTERN_C_P (olddecl)
949 && (DECL_BUILT_IN (olddecl)
950 #ifndef NO_IMPLICIT_EXTERN_C
951 || (DECL_IN_SYSTEM_HEADER (newdecl) && !DECL_CLASS_SCOPE_P (newdecl))
952 || (DECL_IN_SYSTEM_HEADER (olddecl) && !DECL_CLASS_SCOPE_P (olddecl))
956 types_match = self_promoting_args_p (p1);
957 if (p1 == void_list_node)
958 TREE_TYPE (newdecl) = TREE_TYPE (olddecl);
960 #ifndef NO_IMPLICIT_EXTERN_C
961 else if (p1 == NULL_TREE
962 && (DECL_EXTERN_C_P (olddecl)
963 && DECL_IN_SYSTEM_HEADER (olddecl)
964 && !DECL_CLASS_SCOPE_P (olddecl))
965 && (DECL_EXTERN_C_P (newdecl)
966 && DECL_IN_SYSTEM_HEADER (newdecl)
967 && !DECL_CLASS_SCOPE_P (newdecl)))
969 types_match = self_promoting_args_p (p2);
970 TREE_TYPE (newdecl) = TREE_TYPE (olddecl);
974 types_match = compparms (p1, p2);
979 else if (TREE_CODE (newdecl) == TEMPLATE_DECL)
981 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl))
982 != TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)))
985 if (!comp_template_parms (DECL_TEMPLATE_PARMS (newdecl),
986 DECL_TEMPLATE_PARMS (olddecl)))
989 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
990 types_match = same_type_p (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl)),
991 TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl)));
993 types_match = decls_match (DECL_TEMPLATE_RESULT (olddecl),
994 DECL_TEMPLATE_RESULT (newdecl));
998 /* Need to check scope for variable declaration (VAR_DECL).
999 For typedef (TYPE_DECL), scope is ignored. */
1000 if (TREE_CODE (newdecl) == VAR_DECL
1001 && CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl)
1003 Two declarations for an object with C language linkage
1004 with the same name (ignoring the namespace that qualify
1005 it) that appear in different namespace scopes refer to
1007 && !(DECL_EXTERN_C_P (olddecl) && DECL_EXTERN_C_P (newdecl)))
1010 if (TREE_TYPE (newdecl) == error_mark_node)
1011 types_match = TREE_TYPE (olddecl) == error_mark_node;
1012 else if (TREE_TYPE (olddecl) == NULL_TREE)
1013 types_match = TREE_TYPE (newdecl) == NULL_TREE;
1014 else if (TREE_TYPE (newdecl) == NULL_TREE)
1017 types_match = comptypes (TREE_TYPE (newdecl),
1018 TREE_TYPE (olddecl),
1019 COMPARE_REDECLARATION);
1025 /* If NEWDECL is `static' and an `extern' was seen previously,
1026 warn about it. OLDDECL is the previous declaration.
1028 Note that this does not apply to the C++ case of declaring
1029 a variable `extern const' and then later `const'.
1031 Don't complain about built-in functions, since they are beyond
1032 the user's control. */
1035 warn_extern_redeclared_static (tree newdecl, tree olddecl)
1037 if (TREE_CODE (newdecl) == TYPE_DECL
1038 || TREE_CODE (newdecl) == TEMPLATE_DECL
1039 || TREE_CODE (newdecl) == CONST_DECL
1040 || TREE_CODE (newdecl) == NAMESPACE_DECL)
1043 /* Don't get confused by static member functions; that's a different
1045 if (TREE_CODE (newdecl) == FUNCTION_DECL
1046 && DECL_STATIC_FUNCTION_P (newdecl))
1049 /* If the old declaration was `static', or the new one isn't, then
1050 then everything is OK. */
1051 if (DECL_THIS_STATIC (olddecl) || !DECL_THIS_STATIC (newdecl))
1054 /* It's OK to declare a builtin function as `static'. */
1055 if (TREE_CODE (olddecl) == FUNCTION_DECL
1056 && DECL_ARTIFICIAL (olddecl))
1059 permerror (input_location, "%qD was declared %<extern%> and later %<static%>", newdecl);
1060 permerror (input_location, "previous declaration of %q+D", olddecl);
1063 /* NEW_DECL is a redeclaration of OLD_DECL; both are functions or
1064 function templates. If their exception specifications do not
1065 match, issue a diagnostic. */
1068 check_redeclaration_exception_specification (tree new_decl,
1073 tree new_exceptions;
1074 tree old_exceptions;
1076 new_type = TREE_TYPE (new_decl);
1077 new_exceptions = TYPE_RAISES_EXCEPTIONS (new_type);
1078 old_type = TREE_TYPE (old_decl);
1079 old_exceptions = TYPE_RAISES_EXCEPTIONS (old_type);
1083 If any declaration of a function has an exception-specification,
1084 all declarations, including the definition and an explicit
1085 specialization, of that function shall have an
1086 exception-specification with the same set of type-ids. */
1087 if ((pedantic || ! DECL_IN_SYSTEM_HEADER (old_decl))
1088 && ! DECL_IS_BUILTIN (old_decl)
1090 && !comp_except_specs (new_exceptions, old_exceptions,
1093 error ("declaration of %qF throws different exceptions", new_decl);
1094 error ("from previous declaration %q+F", old_decl);
1098 #define GNU_INLINE_P(fn) (DECL_DECLARED_INLINE_P (fn) \
1099 && lookup_attribute ("gnu_inline", \
1100 DECL_ATTRIBUTES (fn)))
1102 /* If NEWDECL is a redeclaration of OLDDECL, merge the declarations.
1103 If the redeclaration is invalid, a diagnostic is issued, and the
1104 error_mark_node is returned. Otherwise, OLDDECL is returned.
1106 If NEWDECL is not a redeclaration of OLDDECL, NULL_TREE is
1109 NEWDECL_IS_FRIEND is true if NEWDECL was declared as a friend. */
1112 duplicate_decls (tree newdecl, tree olddecl, bool newdecl_is_friend)
1114 unsigned olddecl_uid = DECL_UID (olddecl);
1115 int olddecl_friend = 0, types_match = 0, hidden_friend = 0;
1116 int new_defines_function = 0;
1117 tree new_template_info;
1119 if (newdecl == olddecl)
1122 types_match = decls_match (newdecl, olddecl);
1124 /* If either the type of the new decl or the type of the old decl is an
1125 error_mark_node, then that implies that we have already issued an
1126 error (earlier) for some bogus type specification, and in that case,
1127 it is rather pointless to harass the user with yet more error message
1128 about the same declaration, so just pretend the types match here. */
1129 if (TREE_TYPE (newdecl) == error_mark_node
1130 || TREE_TYPE (olddecl) == error_mark_node)
1131 return error_mark_node;
1133 if (DECL_P (olddecl)
1134 && TREE_CODE (newdecl) == FUNCTION_DECL
1135 && TREE_CODE (olddecl) == FUNCTION_DECL
1136 && (DECL_UNINLINABLE (newdecl) || DECL_UNINLINABLE (olddecl)))
1138 if (DECL_DECLARED_INLINE_P (newdecl)
1139 && DECL_UNINLINABLE (newdecl)
1140 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl)))
1141 /* Already warned elsewhere. */;
1142 else if (DECL_DECLARED_INLINE_P (olddecl)
1143 && DECL_UNINLINABLE (olddecl)
1144 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl)))
1145 /* Already warned. */;
1146 else if (DECL_DECLARED_INLINE_P (newdecl)
1147 && DECL_UNINLINABLE (olddecl)
1148 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl)))
1150 warning (OPT_Wattributes, "function %q+D redeclared as inline",
1152 warning (OPT_Wattributes, "previous declaration of %q+D "
1153 "with attribute noinline", olddecl);
1155 else if (DECL_DECLARED_INLINE_P (olddecl)
1156 && DECL_UNINLINABLE (newdecl)
1157 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl)))
1159 warning (OPT_Wattributes, "function %q+D redeclared with "
1160 "attribute noinline", newdecl);
1161 warning (OPT_Wattributes, "previous declaration of %q+D was inline",
1166 /* Check for redeclaration and other discrepancies. */
1167 if (TREE_CODE (olddecl) == FUNCTION_DECL
1168 && DECL_ARTIFICIAL (olddecl))
1170 gcc_assert (!DECL_HIDDEN_FRIEND_P (olddecl));
1171 if (TREE_CODE (newdecl) != FUNCTION_DECL)
1173 /* Avoid warnings redeclaring built-ins which have not been
1174 explicitly declared. */
1175 if (DECL_ANTICIPATED (olddecl))
1178 /* If you declare a built-in or predefined function name as static,
1179 the old definition is overridden, but optionally warn this was a
1180 bad choice of name. */
1181 if (! TREE_PUBLIC (newdecl))
1183 warning (OPT_Wshadow,
1184 DECL_BUILT_IN (olddecl)
1185 ? G_("shadowing built-in function %q#D")
1186 : G_("shadowing library function %q#D"), olddecl);
1187 /* Discard the old built-in function. */
1190 /* If the built-in is not ansi, then programs can override
1191 it even globally without an error. */
1192 else if (! DECL_BUILT_IN (olddecl))
1193 warning (0, "library function %q#D redeclared as non-function %q#D",
1197 error ("declaration of %q#D", newdecl);
1198 error ("conflicts with built-in declaration %q#D",
1203 else if (!types_match)
1205 /* Avoid warnings redeclaring built-ins which have not been
1206 explicitly declared. */
1207 if (DECL_ANTICIPATED (olddecl))
1209 /* Deal with fileptr_type_node. FILE type is not known
1210 at the time we create the builtins. */
1213 for (t1 = TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1214 t2 = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1216 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2))
1219 else if (TREE_VALUE (t2) == fileptr_type_node)
1221 tree t = TREE_VALUE (t1);
1223 if (TREE_CODE (t) == POINTER_TYPE
1224 && TYPE_NAME (TREE_TYPE (t))
1225 && DECL_NAME (TYPE_NAME (TREE_TYPE (t)))
1226 == get_identifier ("FILE")
1227 && compparms (TREE_CHAIN (t1), TREE_CHAIN (t2)))
1229 tree oldargs = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1231 TYPE_ARG_TYPES (TREE_TYPE (olddecl))
1232 = TYPE_ARG_TYPES (TREE_TYPE (newdecl));
1233 types_match = decls_match (newdecl, olddecl);
1235 return duplicate_decls (newdecl, olddecl,
1237 TYPE_ARG_TYPES (TREE_TYPE (olddecl)) = oldargs;
1240 else if (! same_type_p (TREE_VALUE (t1), TREE_VALUE (t2)))
1243 else if ((DECL_EXTERN_C_P (newdecl)
1244 && DECL_EXTERN_C_P (olddecl))
1245 || compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1246 TYPE_ARG_TYPES (TREE_TYPE (olddecl))))
1248 /* A near match; override the builtin. */
1250 if (TREE_PUBLIC (newdecl))
1252 warning (0, "new declaration %q#D", newdecl);
1253 warning (0, "ambiguates built-in declaration %q#D",
1257 warning (OPT_Wshadow,
1258 DECL_BUILT_IN (olddecl)
1259 ? G_("shadowing built-in function %q#D")
1260 : G_("shadowing library function %q#D"), olddecl);
1263 /* Discard the old built-in function. */
1266 /* Replace the old RTL to avoid problems with inlining. */
1267 COPY_DECL_RTL (newdecl, olddecl);
1269 /* Even if the types match, prefer the new declarations type for
1270 built-ins which have not been explicitly declared, for
1271 exception lists, etc... */
1272 else if (DECL_ANTICIPATED (olddecl))
1274 tree type = TREE_TYPE (newdecl);
1275 tree attribs = (*targetm.merge_type_attributes)
1276 (TREE_TYPE (olddecl), type);
1278 type = cp_build_type_attribute_variant (type, attribs);
1279 TREE_TYPE (newdecl) = TREE_TYPE (olddecl) = type;
1282 /* If a function is explicitly declared "throw ()", propagate that to
1283 the corresponding builtin. */
1284 if (DECL_BUILT_IN_CLASS (olddecl) == BUILT_IN_NORMAL
1285 && DECL_ANTICIPATED (olddecl)
1286 && TREE_NOTHROW (newdecl)
1287 && !TREE_NOTHROW (olddecl)
1288 && built_in_decls [DECL_FUNCTION_CODE (olddecl)] != NULL_TREE
1289 && built_in_decls [DECL_FUNCTION_CODE (olddecl)] != olddecl
1291 TREE_NOTHROW (built_in_decls [DECL_FUNCTION_CODE (olddecl)]) = 1;
1293 /* Whether or not the builtin can throw exceptions has no
1294 bearing on this declarator. */
1295 TREE_NOTHROW (olddecl) = 0;
1297 if (DECL_THIS_STATIC (newdecl) && !DECL_THIS_STATIC (olddecl))
1299 /* If a builtin function is redeclared as `static', merge
1300 the declarations, but make the original one static. */
1301 DECL_THIS_STATIC (olddecl) = 1;
1302 TREE_PUBLIC (olddecl) = 0;
1304 /* Make the old declaration consistent with the new one so
1305 that all remnants of the builtin-ness of this function
1306 will be banished. */
1307 SET_DECL_LANGUAGE (olddecl, DECL_LANGUAGE (newdecl));
1308 COPY_DECL_RTL (newdecl, olddecl);
1311 else if (TREE_CODE (olddecl) != TREE_CODE (newdecl))
1313 /* C++ Standard, 3.3, clause 4:
1314 "[Note: a namespace name or a class template name must be unique
1315 in its declarative region (7.3.2, clause 14). ]" */
1316 if (TREE_CODE (olddecl) != NAMESPACE_DECL
1317 && TREE_CODE (newdecl) != NAMESPACE_DECL
1318 && (TREE_CODE (olddecl) != TEMPLATE_DECL
1319 || TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) != TYPE_DECL)
1320 && (TREE_CODE (newdecl) != TEMPLATE_DECL
1321 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) != TYPE_DECL))
1323 if ((TREE_CODE (olddecl) == TYPE_DECL && DECL_ARTIFICIAL (olddecl)
1324 && TREE_CODE (newdecl) != TYPE_DECL)
1325 || (TREE_CODE (newdecl) == TYPE_DECL && DECL_ARTIFICIAL (newdecl)
1326 && TREE_CODE (olddecl) != TYPE_DECL))
1328 /* We do nothing special here, because C++ does such nasty
1329 things with TYPE_DECLs. Instead, just let the TYPE_DECL
1330 get shadowed, and know that if we need to find a TYPE_DECL
1331 for a given name, we can look in the IDENTIFIER_TYPE_VALUE
1332 slot of the identifier. */
1336 if ((TREE_CODE (newdecl) == FUNCTION_DECL
1337 && DECL_FUNCTION_TEMPLATE_P (olddecl))
1338 || (TREE_CODE (olddecl) == FUNCTION_DECL
1339 && DECL_FUNCTION_TEMPLATE_P (newdecl)))
1343 error ("%q#D redeclared as different kind of symbol", newdecl);
1344 if (TREE_CODE (olddecl) == TREE_LIST)
1345 olddecl = TREE_VALUE (olddecl);
1346 error ("previous declaration of %q+#D", olddecl);
1348 return error_mark_node;
1350 else if (!types_match)
1352 if (CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl))
1353 /* These are certainly not duplicate declarations; they're
1354 from different scopes. */
1357 if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1359 /* The name of a class template may not be declared to refer to
1360 any other template, class, function, object, namespace, value,
1361 or type in the same scope. */
1362 if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) == TYPE_DECL
1363 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
1365 error ("declaration of template %q#D", newdecl);
1366 error ("conflicts with previous declaration %q+#D", olddecl);
1368 else if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) == FUNCTION_DECL
1369 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == FUNCTION_DECL
1370 && compparms (TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl))),
1371 TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl))))
1372 && comp_template_parms (DECL_TEMPLATE_PARMS (newdecl),
1373 DECL_TEMPLATE_PARMS (olddecl))
1374 /* Template functions can be disambiguated by
1376 && same_type_p (TREE_TYPE (TREE_TYPE (newdecl)),
1377 TREE_TYPE (TREE_TYPE (olddecl))))
1379 error ("new declaration %q#D", newdecl);
1380 error ("ambiguates old declaration %q+#D", olddecl);
1384 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1386 if (DECL_EXTERN_C_P (newdecl) && DECL_EXTERN_C_P (olddecl))
1388 error ("declaration of C function %q#D conflicts with",
1390 error ("previous declaration %q+#D here", olddecl);
1392 else if (compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1393 TYPE_ARG_TYPES (TREE_TYPE (olddecl))))
1395 error ("new declaration %q#D", newdecl);
1396 error ("ambiguates old declaration %q+#D", olddecl);
1397 return error_mark_node;
1404 error ("conflicting declaration %q#D", newdecl);
1405 error ("%q+D has a previous declaration as %q#D", olddecl, olddecl);
1406 return error_mark_node;
1409 else if (TREE_CODE (newdecl) == FUNCTION_DECL
1410 && ((DECL_TEMPLATE_SPECIALIZATION (olddecl)
1411 && (!DECL_TEMPLATE_INFO (newdecl)
1412 || (DECL_TI_TEMPLATE (newdecl)
1413 != DECL_TI_TEMPLATE (olddecl))))
1414 || (DECL_TEMPLATE_SPECIALIZATION (newdecl)
1415 && (!DECL_TEMPLATE_INFO (olddecl)
1416 || (DECL_TI_TEMPLATE (olddecl)
1417 != DECL_TI_TEMPLATE (newdecl))))))
1418 /* It's OK to have a template specialization and a non-template
1419 with the same type, or to have specializations of two
1420 different templates with the same type. Note that if one is a
1421 specialization, and the other is an instantiation of the same
1422 template, that we do not exit at this point. That situation
1423 can occur if we instantiate a template class, and then
1424 specialize one of its methods. This situation is valid, but
1425 the declarations must be merged in the usual way. */
1427 else if (TREE_CODE (newdecl) == FUNCTION_DECL
1428 && ((DECL_TEMPLATE_INSTANTIATION (olddecl)
1429 && !DECL_USE_TEMPLATE (newdecl))
1430 || (DECL_TEMPLATE_INSTANTIATION (newdecl)
1431 && !DECL_USE_TEMPLATE (olddecl))))
1432 /* One of the declarations is a template instantiation, and the
1433 other is not a template at all. That's OK. */
1435 else if (TREE_CODE (newdecl) == NAMESPACE_DECL)
1437 /* In [namespace.alias] we have:
1439 In a declarative region, a namespace-alias-definition can be
1440 used to redefine a namespace-alias declared in that declarative
1441 region to refer only to the namespace to which it already
1444 Therefore, if we encounter a second alias directive for the same
1445 alias, we can just ignore the second directive. */
1446 if (DECL_NAMESPACE_ALIAS (newdecl)
1447 && (DECL_NAMESPACE_ALIAS (newdecl)
1448 == DECL_NAMESPACE_ALIAS (olddecl)))
1450 /* [namespace.alias]
1452 A namespace-name or namespace-alias shall not be declared as
1453 the name of any other entity in the same declarative region.
1454 A namespace-name defined at global scope shall not be
1455 declared as the name of any other entity in any global scope
1457 error ("declaration of namespace %qD conflicts with", newdecl);
1458 error ("previous declaration of namespace %q+D here", olddecl);
1459 return error_mark_node;
1463 const char *errmsg = redeclaration_error_message (newdecl, olddecl);
1466 error_at (DECL_SOURCE_LOCATION (newdecl), errmsg, newdecl);
1467 if (DECL_NAME (olddecl) != NULL_TREE)
1468 error ((DECL_INITIAL (olddecl) && namespace_bindings_p ())
1469 ? "%q+#D previously defined here"
1470 : "%q+#D previously declared here", olddecl);
1471 return error_mark_node;
1473 else if (TREE_CODE (olddecl) == FUNCTION_DECL
1474 && DECL_INITIAL (olddecl) != NULL_TREE
1475 && TYPE_ARG_TYPES (TREE_TYPE (olddecl)) == NULL_TREE
1476 && TYPE_ARG_TYPES (TREE_TYPE (newdecl)) != NULL_TREE)
1478 /* Prototype decl follows defn w/o prototype. */
1479 warning_at (input_location, 0, "prototype for %q+#D", newdecl);
1480 warning_at (DECL_SOURCE_LOCATION (olddecl), 0,
1481 "follows non-prototype definition here");
1483 else if ((TREE_CODE (olddecl) == FUNCTION_DECL
1484 || TREE_CODE (olddecl) == VAR_DECL)
1485 && DECL_LANGUAGE (newdecl) != DECL_LANGUAGE (olddecl))
1488 If two declarations of the same function or object
1489 specify different linkage-specifications ..., the program
1490 is ill-formed.... Except for functions with C++ linkage,
1491 a function declaration without a linkage specification
1492 shall not precede the first linkage specification for
1493 that function. A function can be declared without a
1494 linkage specification after an explicit linkage
1495 specification has been seen; the linkage explicitly
1496 specified in the earlier declaration is not affected by
1497 such a function declaration.
1499 DR 563 raises the question why the restrictions on
1500 functions should not also apply to objects. Older
1501 versions of G++ silently ignore the linkage-specification
1509 which is clearly wrong. Therefore, we now treat objects
1511 if (current_lang_depth () == 0)
1513 /* There is no explicit linkage-specification, so we use
1514 the linkage from the previous declaration. */
1515 if (!DECL_LANG_SPECIFIC (newdecl))
1516 retrofit_lang_decl (newdecl);
1517 SET_DECL_LANGUAGE (newdecl, DECL_LANGUAGE (olddecl));
1521 error ("previous declaration of %q+#D with %qL linkage",
1522 olddecl, DECL_LANGUAGE (olddecl));
1523 error ("conflicts with new declaration with %qL linkage",
1524 DECL_LANGUAGE (newdecl));
1528 if (DECL_LANG_SPECIFIC (olddecl) && DECL_USE_TEMPLATE (olddecl))
1530 else if (TREE_CODE (olddecl) == FUNCTION_DECL)
1532 tree t1 = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1533 tree t2 = TYPE_ARG_TYPES (TREE_TYPE (newdecl));
1536 if (TREE_CODE (TREE_TYPE (newdecl)) == METHOD_TYPE)
1537 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2);
1539 for (; t1 && t1 != void_list_node;
1540 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2), i++)
1541 if (TREE_PURPOSE (t1) && TREE_PURPOSE (t2))
1543 if (1 == simple_cst_equal (TREE_PURPOSE (t1),
1546 permerror (input_location, "default argument given for parameter %d of %q#D",
1548 permerror (input_location, "after previous specification in %q+#D", olddecl);
1552 error ("default argument given for parameter %d of %q#D",
1554 error ("after previous specification in %q+#D",
1561 /* Do not merge an implicit typedef with an explicit one. In:
1565 typedef class A A __attribute__ ((foo));
1567 the attribute should apply only to the typedef. */
1568 if (TREE_CODE (olddecl) == TYPE_DECL
1569 && (DECL_IMPLICIT_TYPEDEF_P (olddecl)
1570 || DECL_IMPLICIT_TYPEDEF_P (newdecl)))
1573 /* If new decl is `static' and an `extern' was seen previously,
1575 warn_extern_redeclared_static (newdecl, olddecl);
1577 /* We have committed to returning 1 at this point. */
1578 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1580 /* Now that functions must hold information normally held
1581 by field decls, there is extra work to do so that
1582 declaration information does not get destroyed during
1584 if (DECL_VINDEX (olddecl))
1585 DECL_VINDEX (newdecl) = DECL_VINDEX (olddecl);
1586 if (DECL_CONTEXT (olddecl))
1587 DECL_CONTEXT (newdecl) = DECL_CONTEXT (olddecl);
1588 DECL_STATIC_CONSTRUCTOR (newdecl) |= DECL_STATIC_CONSTRUCTOR (olddecl);
1589 DECL_STATIC_DESTRUCTOR (newdecl) |= DECL_STATIC_DESTRUCTOR (olddecl);
1590 DECL_PURE_VIRTUAL_P (newdecl) |= DECL_PURE_VIRTUAL_P (olddecl);
1591 DECL_VIRTUAL_P (newdecl) |= DECL_VIRTUAL_P (olddecl);
1592 DECL_INVALID_OVERRIDER_P (newdecl) |= DECL_INVALID_OVERRIDER_P (olddecl);
1593 DECL_THIS_STATIC (newdecl) |= DECL_THIS_STATIC (olddecl);
1594 if (DECL_OVERLOADED_OPERATOR_P (olddecl) != ERROR_MARK)
1595 SET_OVERLOADED_OPERATOR_CODE
1596 (newdecl, DECL_OVERLOADED_OPERATOR_P (olddecl));
1597 new_defines_function = DECL_INITIAL (newdecl) != NULL_TREE;
1599 /* Optionally warn about more than one declaration for the same
1600 name, but don't warn about a function declaration followed by a
1602 if (warn_redundant_decls && ! DECL_ARTIFICIAL (olddecl)
1603 && !(new_defines_function && DECL_INITIAL (olddecl) == NULL_TREE)
1604 /* Don't warn about extern decl followed by definition. */
1605 && !(DECL_EXTERNAL (olddecl) && ! DECL_EXTERNAL (newdecl))
1606 /* Don't warn about friends, let add_friend take care of it. */
1607 && ! (newdecl_is_friend || DECL_FRIEND_P (olddecl)))
1609 warning (OPT_Wredundant_decls, "redundant redeclaration of %qD in same scope", newdecl);
1610 warning (OPT_Wredundant_decls, "previous declaration of %q+D", olddecl);
1613 if (DECL_DELETED_FN (newdecl))
1615 error ("deleted definition of %qD", newdecl);
1616 error ("after previous declaration %q+D", olddecl);
1620 /* Deal with C++: must preserve virtual function table size. */
1621 if (TREE_CODE (olddecl) == TYPE_DECL)
1623 tree newtype = TREE_TYPE (newdecl);
1624 tree oldtype = TREE_TYPE (olddecl);
1626 if (newtype != error_mark_node && oldtype != error_mark_node
1627 && TYPE_LANG_SPECIFIC (newtype) && TYPE_LANG_SPECIFIC (oldtype))
1628 CLASSTYPE_FRIEND_CLASSES (newtype)
1629 = CLASSTYPE_FRIEND_CLASSES (oldtype);
1631 DECL_ORIGINAL_TYPE (newdecl) = DECL_ORIGINAL_TYPE (olddecl);
1634 /* Copy all the DECL_... slots specified in the new decl
1635 except for any that we copy here from the old type. */
1636 DECL_ATTRIBUTES (newdecl)
1637 = (*targetm.merge_decl_attributes) (olddecl, newdecl);
1639 if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1643 old_result = DECL_TEMPLATE_RESULT (olddecl);
1644 new_result = DECL_TEMPLATE_RESULT (newdecl);
1645 TREE_TYPE (olddecl) = TREE_TYPE (old_result);
1646 DECL_TEMPLATE_SPECIALIZATIONS (olddecl)
1647 = chainon (DECL_TEMPLATE_SPECIALIZATIONS (olddecl),
1648 DECL_TEMPLATE_SPECIALIZATIONS (newdecl));
1650 DECL_ATTRIBUTES (old_result)
1651 = (*targetm.merge_decl_attributes) (old_result, new_result);
1653 if (DECL_FUNCTION_TEMPLATE_P (newdecl))
1655 if (GNU_INLINE_P (old_result) != GNU_INLINE_P (new_result)
1656 && DECL_INITIAL (new_result))
1658 if (DECL_INITIAL (old_result))
1659 DECL_UNINLINABLE (old_result) = 1;
1661 DECL_UNINLINABLE (old_result) = DECL_UNINLINABLE (new_result);
1662 DECL_EXTERNAL (old_result) = DECL_EXTERNAL (new_result);
1663 DECL_NOT_REALLY_EXTERN (old_result)
1664 = DECL_NOT_REALLY_EXTERN (new_result);
1665 DECL_INTERFACE_KNOWN (old_result)
1666 = DECL_INTERFACE_KNOWN (new_result);
1667 DECL_DECLARED_INLINE_P (old_result)
1668 = DECL_DECLARED_INLINE_P (new_result);
1669 DECL_DISREGARD_INLINE_LIMITS (old_result)
1670 |= DECL_DISREGARD_INLINE_LIMITS (new_result);
1675 DECL_DECLARED_INLINE_P (old_result)
1676 |= DECL_DECLARED_INLINE_P (new_result);
1677 DECL_DISREGARD_INLINE_LIMITS (old_result)
1678 |= DECL_DISREGARD_INLINE_LIMITS (new_result);
1679 check_redeclaration_exception_specification (newdecl, olddecl);
1683 /* If the new declaration is a definition, update the file and
1684 line information on the declaration, and also make
1685 the old declaration the same definition. */
1686 if (DECL_INITIAL (new_result) != NULL_TREE)
1688 DECL_SOURCE_LOCATION (olddecl)
1689 = DECL_SOURCE_LOCATION (old_result)
1690 = DECL_SOURCE_LOCATION (newdecl);
1691 DECL_INITIAL (old_result) = DECL_INITIAL (new_result);
1692 if (DECL_FUNCTION_TEMPLATE_P (newdecl))
1695 DECL_ARGUMENTS (old_result)
1696 = DECL_ARGUMENTS (new_result);
1697 for (parm = DECL_ARGUMENTS (old_result); parm;
1698 parm = TREE_CHAIN (parm))
1699 DECL_CONTEXT (parm) = old_result;
1708 /* Automatically handles default parameters. */
1709 tree oldtype = TREE_TYPE (olddecl);
1712 /* Merge the data types specified in the two decls. */
1713 newtype = merge_types (TREE_TYPE (newdecl), TREE_TYPE (olddecl));
1715 /* If merge_types produces a non-typedef type, just use the old type. */
1716 if (TREE_CODE (newdecl) == TYPE_DECL
1717 && newtype == DECL_ORIGINAL_TYPE (newdecl))
1720 if (TREE_CODE (newdecl) == VAR_DECL)
1722 DECL_THIS_EXTERN (newdecl) |= DECL_THIS_EXTERN (olddecl);
1723 DECL_INITIALIZED_P (newdecl) |= DECL_INITIALIZED_P (olddecl);
1724 DECL_NONTRIVIALLY_INITIALIZED_P (newdecl)
1725 |= DECL_NONTRIVIALLY_INITIALIZED_P (olddecl);
1726 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (newdecl)
1727 |= DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (olddecl);
1729 /* Merge the threadprivate attribute from OLDDECL into NEWDECL. */
1730 if (DECL_LANG_SPECIFIC (olddecl)
1731 && CP_DECL_THREADPRIVATE_P (olddecl))
1733 /* Allocate a LANG_SPECIFIC structure for NEWDECL, if needed. */
1734 if (!DECL_LANG_SPECIFIC (newdecl))
1735 retrofit_lang_decl (newdecl);
1737 DECL_TLS_MODEL (newdecl) = DECL_TLS_MODEL (olddecl);
1738 CP_DECL_THREADPRIVATE_P (newdecl) = 1;
1742 /* Do this after calling `merge_types' so that default
1743 parameters don't confuse us. */
1744 else if (TREE_CODE (newdecl) == FUNCTION_DECL)
1745 check_redeclaration_exception_specification (newdecl, olddecl);
1746 TREE_TYPE (newdecl) = TREE_TYPE (olddecl) = newtype;
1748 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1749 check_default_args (newdecl);
1751 /* Lay the type out, unless already done. */
1752 if (! same_type_p (newtype, oldtype)
1753 && TREE_TYPE (newdecl) != error_mark_node
1754 && !(processing_template_decl && uses_template_parms (newdecl)))
1755 layout_type (TREE_TYPE (newdecl));
1757 if ((TREE_CODE (newdecl) == VAR_DECL
1758 || TREE_CODE (newdecl) == PARM_DECL
1759 || TREE_CODE (newdecl) == RESULT_DECL
1760 || TREE_CODE (newdecl) == FIELD_DECL
1761 || TREE_CODE (newdecl) == TYPE_DECL)
1762 && !(processing_template_decl && uses_template_parms (newdecl)))
1763 layout_decl (newdecl, 0);
1765 /* Merge the type qualifiers. */
1766 if (TREE_READONLY (newdecl))
1767 TREE_READONLY (olddecl) = 1;
1768 if (TREE_THIS_VOLATILE (newdecl))
1769 TREE_THIS_VOLATILE (olddecl) = 1;
1770 if (TREE_NOTHROW (newdecl))
1771 TREE_NOTHROW (olddecl) = 1;
1773 /* Merge deprecatedness. */
1774 if (TREE_DEPRECATED (newdecl))
1775 TREE_DEPRECATED (olddecl) = 1;
1777 /* Preserve function specific target and optimization options */
1778 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1780 if (DECL_FUNCTION_SPECIFIC_TARGET (olddecl)
1781 && !DECL_FUNCTION_SPECIFIC_TARGET (newdecl))
1782 DECL_FUNCTION_SPECIFIC_TARGET (newdecl)
1783 = DECL_FUNCTION_SPECIFIC_TARGET (olddecl);
1785 if (DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl)
1786 && !DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl))
1787 DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl)
1788 = DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl);
1791 /* Merge the initialization information. */
1792 if (DECL_INITIAL (newdecl) == NULL_TREE
1793 && DECL_INITIAL (olddecl) != NULL_TREE)
1795 DECL_INITIAL (newdecl) = DECL_INITIAL (olddecl);
1796 DECL_SOURCE_LOCATION (newdecl) = DECL_SOURCE_LOCATION (olddecl);
1797 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1799 DECL_SAVED_TREE (newdecl) = DECL_SAVED_TREE (olddecl);
1800 DECL_STRUCT_FUNCTION (newdecl) = DECL_STRUCT_FUNCTION (olddecl);
1804 /* Merge the section attribute.
1805 We want to issue an error if the sections conflict but that must be
1806 done later in decl_attributes since we are called before attributes
1808 if (DECL_SECTION_NAME (newdecl) == NULL_TREE)
1809 DECL_SECTION_NAME (newdecl) = DECL_SECTION_NAME (olddecl);
1811 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1813 DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (newdecl)
1814 |= DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (olddecl);
1815 DECL_NO_LIMIT_STACK (newdecl) |= DECL_NO_LIMIT_STACK (olddecl);
1816 TREE_THIS_VOLATILE (newdecl) |= TREE_THIS_VOLATILE (olddecl);
1817 TREE_NOTHROW (newdecl) |= TREE_NOTHROW (olddecl);
1818 DECL_IS_MALLOC (newdecl) |= DECL_IS_MALLOC (olddecl);
1819 DECL_IS_OPERATOR_NEW (newdecl) |= DECL_IS_OPERATOR_NEW (olddecl);
1820 DECL_PURE_P (newdecl) |= DECL_PURE_P (olddecl);
1821 TREE_READONLY (newdecl) |= TREE_READONLY (olddecl);
1822 DECL_LOOPING_CONST_OR_PURE_P (newdecl)
1823 |= DECL_LOOPING_CONST_OR_PURE_P (olddecl);
1824 /* Keep the old RTL. */
1825 COPY_DECL_RTL (olddecl, newdecl);
1827 else if (TREE_CODE (newdecl) == VAR_DECL
1828 && (DECL_SIZE (olddecl) || !DECL_SIZE (newdecl)))
1830 /* Keep the old RTL. We cannot keep the old RTL if the old
1831 declaration was for an incomplete object and the new
1832 declaration is not since many attributes of the RTL will
1834 COPY_DECL_RTL (olddecl, newdecl);
1837 /* If cannot merge, then use the new type and qualifiers,
1838 and don't preserve the old rtl. */
1841 /* Clean out any memory we had of the old declaration. */
1842 tree oldstatic = value_member (olddecl, static_aggregates);
1844 TREE_VALUE (oldstatic) = error_mark_node;
1846 TREE_TYPE (olddecl) = TREE_TYPE (newdecl);
1847 TREE_READONLY (olddecl) = TREE_READONLY (newdecl);
1848 TREE_THIS_VOLATILE (olddecl) = TREE_THIS_VOLATILE (newdecl);
1849 TREE_SIDE_EFFECTS (olddecl) = TREE_SIDE_EFFECTS (newdecl);
1852 /* Merge the storage class information. */
1853 merge_weak (newdecl, olddecl);
1855 if (DECL_ONE_ONLY (olddecl))
1856 DECL_COMDAT_GROUP (newdecl) = DECL_COMDAT_GROUP (olddecl);
1858 DECL_DEFER_OUTPUT (newdecl) |= DECL_DEFER_OUTPUT (olddecl);
1859 TREE_PUBLIC (newdecl) = TREE_PUBLIC (olddecl);
1860 TREE_STATIC (olddecl) = TREE_STATIC (newdecl) |= TREE_STATIC (olddecl);
1861 if (! DECL_EXTERNAL (olddecl))
1862 DECL_EXTERNAL (newdecl) = 0;
1864 new_template_info = NULL_TREE;
1865 if (DECL_LANG_SPECIFIC (newdecl) && DECL_LANG_SPECIFIC (olddecl))
1867 bool new_redefines_gnu_inline = false;
1869 if (new_defines_function
1870 && ((DECL_INTERFACE_KNOWN (olddecl)
1871 && TREE_CODE (olddecl) == FUNCTION_DECL)
1872 || (TREE_CODE (olddecl) == TEMPLATE_DECL
1873 && (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl))
1874 == FUNCTION_DECL))))
1878 if (TREE_CODE (fn) == TEMPLATE_DECL)
1879 fn = DECL_TEMPLATE_RESULT (olddecl);
1881 new_redefines_gnu_inline = GNU_INLINE_P (fn) && DECL_INITIAL (fn);
1884 if (!new_redefines_gnu_inline)
1886 DECL_INTERFACE_KNOWN (newdecl) |= DECL_INTERFACE_KNOWN (olddecl);
1887 DECL_NOT_REALLY_EXTERN (newdecl) |= DECL_NOT_REALLY_EXTERN (olddecl);
1888 DECL_COMDAT (newdecl) |= DECL_COMDAT (olddecl);
1890 DECL_TEMPLATE_INSTANTIATED (newdecl)
1891 |= DECL_TEMPLATE_INSTANTIATED (olddecl);
1892 DECL_ODR_USED (newdecl) |= DECL_ODR_USED (olddecl);
1894 /* If the OLDDECL is an instantiation and/or specialization,
1895 then the NEWDECL must be too. But, it may not yet be marked
1896 as such if the caller has created NEWDECL, but has not yet
1897 figured out that it is a redeclaration. */
1898 if (!DECL_USE_TEMPLATE (newdecl))
1899 DECL_USE_TEMPLATE (newdecl) = DECL_USE_TEMPLATE (olddecl);
1901 /* Don't really know how much of the language-specific
1902 values we should copy from old to new. */
1903 DECL_IN_AGGR_P (newdecl) = DECL_IN_AGGR_P (olddecl);
1904 DECL_REPO_AVAILABLE_P (newdecl) = DECL_REPO_AVAILABLE_P (olddecl);
1905 DECL_INITIALIZED_IN_CLASS_P (newdecl)
1906 |= DECL_INITIALIZED_IN_CLASS_P (olddecl);
1908 if (LANG_DECL_HAS_MIN (newdecl))
1910 DECL_LANG_SPECIFIC (newdecl)->u.min.u2 =
1911 DECL_LANG_SPECIFIC (olddecl)->u.min.u2;
1912 if (DECL_TEMPLATE_INFO (newdecl))
1913 new_template_info = DECL_TEMPLATE_INFO (newdecl);
1914 DECL_TEMPLATE_INFO (newdecl) = DECL_TEMPLATE_INFO (olddecl);
1916 /* Only functions have these fields. */
1917 if (TREE_CODE (newdecl) == FUNCTION_DECL
1918 || DECL_FUNCTION_TEMPLATE_P (newdecl))
1920 DECL_NONCONVERTING_P (newdecl) = DECL_NONCONVERTING_P (olddecl);
1921 olddecl_friend = DECL_FRIEND_P (olddecl);
1922 hidden_friend = (DECL_ANTICIPATED (olddecl)
1923 && DECL_HIDDEN_FRIEND_P (olddecl)
1924 && newdecl_is_friend);
1925 DECL_BEFRIENDING_CLASSES (newdecl)
1926 = chainon (DECL_BEFRIENDING_CLASSES (newdecl),
1927 DECL_BEFRIENDING_CLASSES (olddecl));
1928 /* DECL_THUNKS is only valid for virtual functions,
1929 otherwise it is a DECL_FRIEND_CONTEXT. */
1930 if (DECL_VIRTUAL_P (newdecl))
1931 DECL_THUNKS (newdecl) = DECL_THUNKS (olddecl);
1935 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1939 /* Merge parameter attributes. */
1940 tree oldarg, newarg;
1941 for (oldarg = DECL_ARGUMENTS(olddecl),
1942 newarg = DECL_ARGUMENTS(newdecl);
1944 oldarg = TREE_CHAIN(oldarg), newarg = TREE_CHAIN(newarg)) {
1945 DECL_ATTRIBUTES (newarg)
1946 = (*targetm.merge_decl_attributes) (oldarg, newarg);
1947 DECL_ATTRIBUTES (oldarg) = DECL_ATTRIBUTES (newarg);
1950 if (DECL_TEMPLATE_INSTANTIATION (olddecl)
1951 && !DECL_TEMPLATE_INSTANTIATION (newdecl))
1953 /* If newdecl is not a specialization, then it is not a
1954 template-related function at all. And that means that we
1955 should have exited above, returning 0. */
1956 gcc_assert (DECL_TEMPLATE_SPECIALIZATION (newdecl));
1958 if (DECL_ODR_USED (olddecl))
1959 /* From [temp.expl.spec]:
1961 If a template, a member template or the member of a class
1962 template is explicitly specialized then that
1963 specialization shall be declared before the first use of
1964 that specialization that would cause an implicit
1965 instantiation to take place, in every translation unit in
1966 which such a use occurs. */
1967 error ("explicit specialization of %qD after first use",
1970 SET_DECL_TEMPLATE_SPECIALIZATION (olddecl);
1972 /* Don't propagate visibility from the template to the
1973 specialization here. We'll do that in determine_visibility if
1975 DECL_VISIBILITY_SPECIFIED (olddecl) = 0;
1977 /* [temp.expl.spec/14] We don't inline explicit specialization
1978 just because the primary template says so. */
1980 else if (new_defines_function && DECL_INITIAL (olddecl))
1982 /* Never inline re-defined extern inline functions.
1983 FIXME: this could be better handled by keeping both
1984 function as separate declarations. */
1985 DECL_UNINLINABLE (newdecl) = 1;
1989 if (DECL_PENDING_INLINE_INFO (newdecl) == 0)
1990 DECL_PENDING_INLINE_INFO (newdecl) = DECL_PENDING_INLINE_INFO (olddecl);
1992 DECL_DECLARED_INLINE_P (newdecl) |= DECL_DECLARED_INLINE_P (olddecl);
1994 DECL_UNINLINABLE (newdecl) = DECL_UNINLINABLE (olddecl)
1995 = (DECL_UNINLINABLE (newdecl) || DECL_UNINLINABLE (olddecl));
1997 DECL_DISREGARD_INLINE_LIMITS (newdecl)
1998 = DECL_DISREGARD_INLINE_LIMITS (olddecl)
1999 = (DECL_DISREGARD_INLINE_LIMITS (newdecl)
2000 || DECL_DISREGARD_INLINE_LIMITS (olddecl));
2003 /* Preserve abstractness on cloned [cd]tors. */
2004 DECL_ABSTRACT (newdecl) = DECL_ABSTRACT (olddecl);
2006 /* Update newdecl's parms to point at olddecl. */
2007 for (parm = DECL_ARGUMENTS (newdecl); parm;
2008 parm = TREE_CHAIN (parm))
2009 DECL_CONTEXT (parm) = olddecl;
2013 SET_DECL_LANGUAGE (olddecl, DECL_LANGUAGE (newdecl));
2014 COPY_DECL_ASSEMBLER_NAME (newdecl, olddecl);
2015 COPY_DECL_RTL (newdecl, olddecl);
2017 if (! types_match || new_defines_function)
2019 /* These need to be copied so that the names are available.
2020 Note that if the types do match, we'll preserve inline
2021 info and other bits, but if not, we won't. */
2022 DECL_ARGUMENTS (olddecl) = DECL_ARGUMENTS (newdecl);
2023 DECL_RESULT (olddecl) = DECL_RESULT (newdecl);
2025 if (new_defines_function)
2026 /* If defining a function declared with other language
2027 linkage, use the previously declared language linkage. */
2028 SET_DECL_LANGUAGE (newdecl, DECL_LANGUAGE (olddecl));
2029 else if (types_match)
2031 /* If redeclaring a builtin function, and not a definition,
2032 it stays built in. */
2033 if (DECL_BUILT_IN (olddecl))
2035 DECL_BUILT_IN_CLASS (newdecl) = DECL_BUILT_IN_CLASS (olddecl);
2036 DECL_FUNCTION_CODE (newdecl) = DECL_FUNCTION_CODE (olddecl);
2037 /* If we're keeping the built-in definition, keep the rtl,
2038 regardless of declaration matches. */
2039 COPY_DECL_RTL (olddecl, newdecl);
2042 DECL_RESULT (newdecl) = DECL_RESULT (olddecl);
2043 /* Don't clear out the arguments if we're just redeclaring a
2045 if (DECL_ARGUMENTS (olddecl))
2046 DECL_ARGUMENTS (newdecl) = DECL_ARGUMENTS (olddecl);
2049 else if (TREE_CODE (newdecl) == NAMESPACE_DECL)
2050 NAMESPACE_LEVEL (newdecl) = NAMESPACE_LEVEL (olddecl);
2052 /* Now preserve various other info from the definition. */
2053 TREE_ADDRESSABLE (newdecl) = TREE_ADDRESSABLE (olddecl);
2054 TREE_ASM_WRITTEN (newdecl) = TREE_ASM_WRITTEN (olddecl);
2055 DECL_COMMON (newdecl) = DECL_COMMON (olddecl);
2056 COPY_DECL_ASSEMBLER_NAME (olddecl, newdecl);
2058 /* Warn about conflicting visibility specifications. */
2059 if (DECL_VISIBILITY_SPECIFIED (olddecl)
2060 && DECL_VISIBILITY_SPECIFIED (newdecl)
2061 && DECL_VISIBILITY (newdecl) != DECL_VISIBILITY (olddecl))
2063 warning_at (input_location, OPT_Wattributes,
2064 "%q+D: visibility attribute ignored because it", newdecl);
2065 warning_at (DECL_SOURCE_LOCATION (olddecl), OPT_Wattributes,
2066 "conflicts with previous declaration here");
2068 /* Choose the declaration which specified visibility. */
2069 if (DECL_VISIBILITY_SPECIFIED (olddecl))
2071 DECL_VISIBILITY (newdecl) = DECL_VISIBILITY (olddecl);
2072 DECL_VISIBILITY_SPECIFIED (newdecl) = 1;
2074 /* Init priority used to be merged from newdecl to olddecl by the memcpy,
2075 so keep this behavior. */
2076 if (TREE_CODE (newdecl) == VAR_DECL && DECL_HAS_INIT_PRIORITY_P (newdecl))
2078 SET_DECL_INIT_PRIORITY (olddecl, DECL_INIT_PRIORITY (newdecl));
2079 DECL_HAS_INIT_PRIORITY_P (olddecl) = 1;
2082 /* The DECL_LANG_SPECIFIC information in OLDDECL will be replaced
2083 with that from NEWDECL below. */
2084 if (DECL_LANG_SPECIFIC (olddecl))
2086 gcc_assert (DECL_LANG_SPECIFIC (olddecl)
2087 != DECL_LANG_SPECIFIC (newdecl));
2088 ggc_free (DECL_LANG_SPECIFIC (olddecl));
2091 /* Merge the USED information. */
2092 if (TREE_USED (olddecl))
2093 TREE_USED (newdecl) = 1;
2094 else if (TREE_USED (newdecl))
2095 TREE_USED (olddecl) = 1;
2097 if (TREE_CODE (newdecl) == FUNCTION_DECL)
2101 function_size = sizeof (struct tree_decl_common);
2103 memcpy ((char *) olddecl + sizeof (struct tree_common),
2104 (char *) newdecl + sizeof (struct tree_common),
2105 function_size - sizeof (struct tree_common));
2107 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
2108 (char *) newdecl + sizeof (struct tree_decl_common),
2109 sizeof (struct tree_function_decl) - sizeof (struct tree_decl_common));
2110 if (new_template_info)
2111 /* If newdecl is a template instantiation, it is possible that
2112 the following sequence of events has occurred:
2114 o A friend function was declared in a class template. The
2115 class template was instantiated.
2117 o The instantiation of the friend declaration was
2118 recorded on the instantiation list, and is newdecl.
2120 o Later, however, instantiate_class_template called pushdecl
2121 on the newdecl to perform name injection. But, pushdecl in
2122 turn called duplicate_decls when it discovered that another
2123 declaration of a global function with the same name already
2126 o Here, in duplicate_decls, we decided to clobber newdecl.
2128 If we're going to do that, we'd better make sure that
2129 olddecl, and not newdecl, is on the list of
2130 instantiations so that if we try to do the instantiation
2131 again we won't get the clobbered declaration. */
2132 reregister_specialization (newdecl,
2138 size_t size = tree_code_size (TREE_CODE (olddecl));
2139 memcpy ((char *) olddecl + sizeof (struct tree_common),
2140 (char *) newdecl + sizeof (struct tree_common),
2141 sizeof (struct tree_decl_common) - sizeof (struct tree_common));
2142 switch (TREE_CODE (olddecl))
2152 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
2153 (char *) newdecl + sizeof (struct tree_decl_common),
2154 size - sizeof (struct tree_decl_common)
2155 + TREE_CODE_LENGTH (TREE_CODE (newdecl)) * sizeof (char *));
2159 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
2160 (char *) newdecl + sizeof (struct tree_decl_common),
2161 sizeof (struct tree_decl_non_common) - sizeof (struct tree_decl_common)
2162 + TREE_CODE_LENGTH (TREE_CODE (newdecl)) * sizeof (char *));
2166 DECL_UID (olddecl) = olddecl_uid;
2168 DECL_FRIEND_P (olddecl) = 1;
2171 DECL_ANTICIPATED (olddecl) = 1;
2172 DECL_HIDDEN_FRIEND_P (olddecl) = 1;
2175 /* NEWDECL contains the merged attribute lists.
2176 Update OLDDECL to be the same. */
2177 DECL_ATTRIBUTES (olddecl) = DECL_ATTRIBUTES (newdecl);
2179 /* If OLDDECL had its DECL_RTL instantiated, re-invoke make_decl_rtl
2180 so that encode_section_info has a chance to look at the new decl
2181 flags and attributes. */
2182 if (DECL_RTL_SET_P (olddecl)
2183 && (TREE_CODE (olddecl) == FUNCTION_DECL
2184 || (TREE_CODE (olddecl) == VAR_DECL
2185 && TREE_STATIC (olddecl))))
2186 make_decl_rtl (olddecl);
2188 /* The NEWDECL will no longer be needed. Because every out-of-class
2189 declaration of a member results in a call to duplicate_decls,
2190 freeing these nodes represents in a significant savings. */
2196 /* Return zero if the declaration NEWDECL is valid
2197 when the declaration OLDDECL (assumed to be for the same name)
2198 has already been seen.
2199 Otherwise return an error message format string with a %s
2200 where the identifier should go. */
2203 redeclaration_error_message (tree newdecl, tree olddecl)
2205 if (TREE_CODE (newdecl) == TYPE_DECL)
2207 /* Because C++ can put things into name space for free,
2208 constructs like "typedef struct foo { ... } foo"
2209 would look like an erroneous redeclaration. */
2210 if (same_type_p (TREE_TYPE (newdecl), TREE_TYPE (olddecl)))
2213 return "redefinition of %q#D";
2215 else if (TREE_CODE (newdecl) == FUNCTION_DECL)
2217 /* If this is a pure function, its olddecl will actually be
2218 the original initialization to `0' (which we force to call
2219 abort()). Don't complain about redefinition in this case. */
2220 if (DECL_LANG_SPECIFIC (olddecl) && DECL_PURE_VIRTUAL_P (olddecl)
2221 && DECL_INITIAL (olddecl) == NULL_TREE)
2224 /* If both functions come from different namespaces, this is not
2225 a redeclaration - this is a conflict with a used function. */
2226 if (DECL_NAMESPACE_SCOPE_P (olddecl)
2227 && DECL_CONTEXT (olddecl) != DECL_CONTEXT (newdecl)
2228 && ! decls_match (olddecl, newdecl))
2229 return "%qD conflicts with used function";
2231 /* We'll complain about linkage mismatches in
2232 warn_extern_redeclared_static. */
2234 /* Defining the same name twice is no good. */
2235 if (DECL_INITIAL (olddecl) != NULL_TREE
2236 && DECL_INITIAL (newdecl) != NULL_TREE)
2238 if (DECL_NAME (olddecl) == NULL_TREE)
2239 return "%q#D not declared in class";
2240 else if (!GNU_INLINE_P (olddecl)
2241 || GNU_INLINE_P (newdecl))
2242 return "redefinition of %q#D";
2245 if (DECL_DECLARED_INLINE_P (olddecl) && DECL_DECLARED_INLINE_P (newdecl))
2247 bool olda = GNU_INLINE_P (olddecl);
2248 bool newa = GNU_INLINE_P (newdecl);
2253 return "%q+D redeclared inline with %<gnu_inline%> attribute";
2255 return "%q+D redeclared inline without %<gnu_inline%> attribute";
2261 else if (TREE_CODE (newdecl) == TEMPLATE_DECL)
2265 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
2267 if (COMPLETE_TYPE_P (TREE_TYPE (newdecl))
2268 && COMPLETE_TYPE_P (TREE_TYPE (olddecl)))
2269 return "redefinition of %q#D";
2273 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) != FUNCTION_DECL
2274 || (DECL_TEMPLATE_RESULT (newdecl)
2275 == DECL_TEMPLATE_RESULT (olddecl)))
2278 nt = DECL_TEMPLATE_RESULT (newdecl);
2279 if (DECL_TEMPLATE_INFO (nt))
2280 nt = DECL_TEMPLATE_RESULT (template_for_substitution (nt));
2281 ot = DECL_TEMPLATE_RESULT (olddecl);
2282 if (DECL_TEMPLATE_INFO (ot))
2283 ot = DECL_TEMPLATE_RESULT (template_for_substitution (ot));
2284 if (DECL_INITIAL (nt) && DECL_INITIAL (ot)
2285 && (!GNU_INLINE_P (ot) || GNU_INLINE_P (nt)))
2286 return "redefinition of %q#D";
2288 if (DECL_DECLARED_INLINE_P (ot) && DECL_DECLARED_INLINE_P (nt))
2290 bool olda = GNU_INLINE_P (ot);
2291 bool newa = GNU_INLINE_P (nt);
2296 return "%q+D redeclared inline with %<gnu_inline%> attribute";
2298 return "%q+D redeclared inline without %<gnu_inline%> attribute";
2302 /* Core issue #226 (C++0x):
2304 If a friend function template declaration specifies a
2305 default template-argument, that declaration shall be a
2306 definition and shall be the only declaration of the
2307 function template in the translation unit. */
2308 if ((cxx_dialect != cxx98)
2309 && TREE_CODE (ot) == FUNCTION_DECL && DECL_FRIEND_P (ot)
2310 && !check_default_tmpl_args (nt, DECL_TEMPLATE_PARMS (newdecl),
2311 /*is_primary=*/1, /*is_partial=*/0,
2312 /*is_friend_decl=*/2))
2313 return "redeclaration of friend %q#D may not have default template arguments";
2317 else if (TREE_CODE (newdecl) == VAR_DECL
2318 && DECL_THREAD_LOCAL_P (newdecl) != DECL_THREAD_LOCAL_P (olddecl)
2319 && (! DECL_LANG_SPECIFIC (olddecl)
2320 || ! CP_DECL_THREADPRIVATE_P (olddecl)
2321 || DECL_THREAD_LOCAL_P (newdecl)))
2323 /* Only variables can be thread-local, and all declarations must
2324 agree on this property. */
2325 if (DECL_THREAD_LOCAL_P (newdecl))
2326 return "thread-local declaration of %q#D follows "
2327 "non-thread-local declaration";
2329 return "non-thread-local declaration of %q#D follows "
2330 "thread-local declaration";
2332 else if (toplevel_bindings_p () || DECL_NAMESPACE_SCOPE_P (newdecl))
2334 /* The objects have been declared at namespace scope. If either
2335 is a member of an anonymous union, then this is an invalid
2336 redeclaration. For example:
2342 if ((TREE_CODE (newdecl) == VAR_DECL && DECL_ANON_UNION_VAR_P (newdecl))
2343 || (TREE_CODE (olddecl) == VAR_DECL && DECL_ANON_UNION_VAR_P (olddecl)))
2344 return "redeclaration of %q#D";
2345 /* If at least one declaration is a reference, there is no
2346 conflict. For example:
2352 if (DECL_EXTERNAL (newdecl) || DECL_EXTERNAL (olddecl))
2354 /* Reject two definitions. */
2355 return "redefinition of %q#D";
2359 /* Objects declared with block scope: */
2360 /* Reject two definitions, and reject a definition
2361 together with an external reference. */
2362 if (!(DECL_EXTERNAL (newdecl) && DECL_EXTERNAL (olddecl)))
2363 return "redeclaration of %q#D";
2368 /* Hash and equality functions for the named_label table. */
2371 named_label_entry_hash (const void *data)
2373 const struct named_label_entry *ent = (const struct named_label_entry *) data;
2374 return DECL_UID (ent->label_decl);
2378 named_label_entry_eq (const void *a, const void *b)
2380 const struct named_label_entry *ent_a = (const struct named_label_entry *) a;
2381 const struct named_label_entry *ent_b = (const struct named_label_entry *) b;
2382 return ent_a->label_decl == ent_b->label_decl;
2385 /* Create a new label, named ID. */
2388 make_label_decl (tree id, int local_p)
2390 struct named_label_entry *ent;
2394 decl = build_decl (input_location, LABEL_DECL, id, void_type_node);
2396 DECL_CONTEXT (decl) = current_function_decl;
2397 DECL_MODE (decl) = VOIDmode;
2398 C_DECLARED_LABEL_FLAG (decl) = local_p;
2400 /* Say where one reference is to the label, for the sake of the
2401 error if it is not defined. */
2402 DECL_SOURCE_LOCATION (decl) = input_location;
2404 /* Record the fact that this identifier is bound to this label. */
2405 SET_IDENTIFIER_LABEL_VALUE (id, decl);
2407 /* Create the label htab for the function on demand. */
2409 named_labels = htab_create_ggc (13, named_label_entry_hash,
2410 named_label_entry_eq, NULL);
2412 /* Record this label on the list of labels used in this function.
2413 We do this before calling make_label_decl so that we get the
2414 IDENTIFIER_LABEL_VALUE before the new label is declared. */
2415 ent = GGC_CNEW (struct named_label_entry);
2416 ent->label_decl = decl;
2418 slot = htab_find_slot (named_labels, ent, INSERT);
2419 gcc_assert (*slot == NULL);
2425 /* Look for a label named ID in the current function. If one cannot
2426 be found, create one. (We keep track of used, but undefined,
2427 labels, and complain about them at the end of a function.) */
2430 lookup_label (tree id)
2434 timevar_push (TV_NAME_LOOKUP);
2435 /* You can't use labels at global scope. */
2436 if (current_function_decl == NULL_TREE)
2438 error ("label %qE referenced outside of any function", id);
2439 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, NULL_TREE);
2442 /* See if we've already got this label. */
2443 decl = IDENTIFIER_LABEL_VALUE (id);
2444 if (decl != NULL_TREE && DECL_CONTEXT (decl) == current_function_decl)
2445 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2447 decl = make_label_decl (id, /*local_p=*/0);
2448 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2451 /* Declare a local label named ID. */
2454 declare_local_label (tree id)
2458 /* Add a new entry to the SHADOWED_LABELS list so that when we leave
2459 this scope we can restore the old value of IDENTIFIER_TYPE_VALUE. */
2460 shadow = tree_cons (IDENTIFIER_LABEL_VALUE (id), NULL_TREE,
2461 current_binding_level->shadowed_labels);
2462 current_binding_level->shadowed_labels = shadow;
2464 decl = make_label_decl (id, /*local_p=*/1);
2465 TREE_VALUE (shadow) = decl;
2470 /* Returns nonzero if it is ill-formed to jump past the declaration of
2471 DECL. Returns 2 if it's also a real problem. */
2474 decl_jump_unsafe (tree decl)
2476 /* [stmt.dcl]/3: A program that jumps from a point where a local variable
2477 with automatic storage duration is not in scope to a point where it is
2478 in scope is ill-formed unless the variable has scalar type, class type
2479 with a trivial default constructor and a trivial destructor, a
2480 cv-qualified version of one of these types, or an array of one of the
2481 preceding types and is declared without an initializer (8.5). */
2482 tree type = TREE_TYPE (decl);
2484 if (TREE_CODE (decl) != VAR_DECL || TREE_STATIC (decl)
2485 || type == error_mark_node)
2488 type = strip_array_types (type);
2490 if (type_has_nontrivial_default_init (TREE_TYPE (decl))
2491 || DECL_NONTRIVIALLY_INITIALIZED_P (decl))
2494 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
2500 /* A subroutine of check_previous_goto_1 to identify a branch to the user. */
2503 identify_goto (tree decl, const location_t *locus)
2506 permerror (input_location, "jump to label %qD", decl);
2508 permerror (input_location, "jump to case label");
2510 permerror (*locus, " from here");
2513 /* Check that a single previously seen jump to a newly defined label
2514 is OK. DECL is the LABEL_DECL or 0; LEVEL is the binding_level for
2515 the jump context; NAMES are the names in scope in LEVEL at the jump
2516 context; LOCUS is the source position of the jump or 0. Returns
2517 true if all is well. */
2520 check_previous_goto_1 (tree decl, struct cp_binding_level* level, tree names,
2521 bool exited_omp, const location_t *locus)
2523 struct cp_binding_level *b;
2524 bool identified = false, saw_eh = false, saw_omp = false;
2528 identify_goto (decl, locus);
2529 error (" exits OpenMP structured block");
2530 identified = saw_omp = true;
2533 for (b = current_binding_level; b ; b = b->level_chain)
2535 tree new_decls, old_decls = (b == level ? names : NULL_TREE);
2537 for (new_decls = b->names; new_decls != old_decls;
2538 new_decls = TREE_CHAIN (new_decls))
2540 int problem = decl_jump_unsafe (new_decls);
2546 identify_goto (decl, locus);
2550 error (" crosses initialization of %q+#D", new_decls);
2552 permerror (input_location, " enters scope of %q+#D which has "
2553 "non-trivial destructor", new_decls);
2558 if ((b->kind == sk_try || b->kind == sk_catch) && !saw_eh)
2562 identify_goto (decl, locus);
2565 if (b->kind == sk_try)
2566 error (" enters try block");
2568 error (" enters catch block");
2571 if (b->kind == sk_omp && !saw_omp)
2575 identify_goto (decl, locus);
2578 error (" enters OpenMP structured block");
2587 check_previous_goto (tree decl, struct named_label_use_entry *use)
2589 check_previous_goto_1 (decl, use->binding_level,
2590 use->names_in_scope, use->in_omp_scope,
2591 &use->o_goto_locus);
2595 check_switch_goto (struct cp_binding_level* level)
2597 return check_previous_goto_1 (NULL_TREE, level, level->names, false, NULL);
2600 /* Check that a new jump to a label DECL is OK. Called by
2601 finish_goto_stmt. */
2604 check_goto (tree decl)
2606 struct named_label_entry *ent, dummy;
2607 bool saw_catch = false, identified = false;
2610 /* We can't know where a computed goto is jumping.
2611 So we assume that it's OK. */
2612 if (TREE_CODE (decl) != LABEL_DECL)
2615 /* We didn't record any information about this label when we created it,
2616 and there's not much point since it's trivial to analyze as a return. */
2617 if (decl == cdtor_label)
2620 dummy.label_decl = decl;
2621 ent = (struct named_label_entry *) htab_find (named_labels, &dummy);
2622 gcc_assert (ent != NULL);
2624 /* If the label hasn't been defined yet, defer checking. */
2625 if (! DECL_INITIAL (decl))
2627 struct named_label_use_entry *new_use;
2629 /* Don't bother creating another use if the last goto had the
2630 same data, and will therefore create the same set of errors. */
2632 && ent->uses->names_in_scope == current_binding_level->names)
2635 new_use = GGC_NEW (struct named_label_use_entry);
2636 new_use->binding_level = current_binding_level;
2637 new_use->names_in_scope = current_binding_level->names;
2638 new_use->o_goto_locus = input_location;
2639 new_use->in_omp_scope = false;
2641 new_use->next = ent->uses;
2642 ent->uses = new_use;
2646 if (ent->in_try_scope || ent->in_catch_scope
2647 || ent->in_omp_scope || ent->bad_decls)
2649 permerror (input_location, "jump to label %q+D", decl);
2650 permerror (input_location, " from here");
2654 for (bad = ent->bad_decls; bad; bad = TREE_CHAIN (bad))
2656 tree b = TREE_VALUE (bad);
2657 int u = decl_jump_unsafe (b);
2659 if (u > 1 && DECL_ARTIFICIAL (b))
2661 /* Can't skip init of __exception_info. */
2662 error_at (DECL_SOURCE_LOCATION (b), " enters catch block");
2666 error (" skips initialization of %q+#D", b);
2668 permerror (input_location, " enters scope of %q+#D which has "
2669 "non-trivial destructor", b);
2672 if (ent->in_try_scope)
2673 error (" enters try block");
2674 else if (ent->in_catch_scope && !saw_catch)
2675 error (" enters catch block");
2677 if (ent->in_omp_scope)
2678 error (" enters OpenMP structured block");
2679 else if (flag_openmp)
2681 struct cp_binding_level *b;
2682 for (b = current_binding_level; b ; b = b->level_chain)
2684 if (b == ent->binding_level)
2686 if (b->kind == sk_omp)
2690 permerror (input_location, "jump to label %q+D", decl);
2691 permerror (input_location, " from here");
2694 error (" exits OpenMP structured block");
2701 /* Check that a return is ok wrt OpenMP structured blocks.
2702 Called by finish_return_stmt. Returns true if all is well. */
2705 check_omp_return (void)
2707 struct cp_binding_level *b;
2708 for (b = current_binding_level; b ; b = b->level_chain)
2709 if (b->kind == sk_omp)
2711 error ("invalid exit from OpenMP structured block");
2717 /* Define a label, specifying the location in the source file.
2718 Return the LABEL_DECL node for the label. */
2721 define_label (location_t location, tree name)
2723 struct named_label_entry *ent, dummy;
2724 struct cp_binding_level *p;
2727 timevar_push (TV_NAME_LOOKUP);
2729 decl = lookup_label (name);
2731 dummy.label_decl = decl;
2732 ent = (struct named_label_entry *) htab_find (named_labels, &dummy);
2733 gcc_assert (ent != NULL);
2735 /* After labels, make any new cleanups in the function go into their
2736 own new (temporary) binding contour. */
2737 for (p = current_binding_level;
2738 p->kind != sk_function_parms;
2740 p->more_cleanups_ok = 0;
2742 if (name == get_identifier ("wchar_t"))
2743 permerror (input_location, "label named wchar_t");
2745 if (DECL_INITIAL (decl) != NULL_TREE)
2747 error ("duplicate label %qD", decl);
2748 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
2752 struct named_label_use_entry *use;
2754 /* Mark label as having been defined. */
2755 DECL_INITIAL (decl) = error_mark_node;
2756 /* Say where in the source. */
2757 DECL_SOURCE_LOCATION (decl) = location;
2759 ent->binding_level = current_binding_level;
2760 ent->names_in_scope = current_binding_level->names;
2762 for (use = ent->uses; use ; use = use->next)
2763 check_previous_goto (decl, use);
2767 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2772 struct cp_binding_level *level;
2773 struct cp_switch *next;
2774 /* The SWITCH_STMT being built. */
2776 /* A splay-tree mapping the low element of a case range to the high
2777 element, or NULL_TREE if there is no high element. Used to
2778 determine whether or not a new case label duplicates an old case
2779 label. We need a tree, rather than simply a hash table, because
2780 of the GNU case range extension. */
2784 /* A stack of the currently active switch statements. The innermost
2785 switch statement is on the top of the stack. There is no need to
2786 mark the stack for garbage collection because it is only active
2787 during the processing of the body of a function, and we never
2788 collect at that point. */
2790 static struct cp_switch *switch_stack;
2792 /* Called right after a switch-statement condition is parsed.
2793 SWITCH_STMT is the switch statement being parsed. */
2796 push_switch (tree switch_stmt)
2798 struct cp_switch *p = XNEW (struct cp_switch);
2799 p->level = current_binding_level;
2800 p->next = switch_stack;
2801 p->switch_stmt = switch_stmt;
2802 p->cases = splay_tree_new (case_compare, NULL, NULL);
2809 struct cp_switch *cs = switch_stack;
2810 location_t switch_location;
2812 /* Emit warnings as needed. */
2813 if (EXPR_HAS_LOCATION (cs->switch_stmt))
2814 switch_location = EXPR_LOCATION (cs->switch_stmt);
2816 switch_location = input_location;
2817 if (!processing_template_decl)
2818 c_do_switch_warnings (cs->cases, switch_location,
2819 SWITCH_STMT_TYPE (cs->switch_stmt),
2820 SWITCH_STMT_COND (cs->switch_stmt));
2822 splay_tree_delete (cs->cases);
2823 switch_stack = switch_stack->next;
2827 /* Note that we've seen a definition of a case label, and complain if this
2828 is a bad place for one. */
2831 finish_case_label (location_t loc, tree low_value, tree high_value)
2834 struct cp_binding_level *p;
2836 if (processing_template_decl)
2840 /* For templates, just add the case label; we'll do semantic
2841 analysis at instantiation-time. */
2842 label = build_decl (loc, LABEL_DECL, NULL_TREE, NULL_TREE);
2843 return add_stmt (build_case_label (loc, low_value, high_value, label));
2846 /* Find the condition on which this switch statement depends. */
2847 cond = SWITCH_STMT_COND (switch_stack->switch_stmt);
2848 if (cond && TREE_CODE (cond) == TREE_LIST)
2849 cond = TREE_VALUE (cond);
2851 if (!check_switch_goto (switch_stack->level))
2852 return error_mark_node;
2854 r = c_add_case_label (loc, switch_stack->cases, cond,
2855 SWITCH_STMT_TYPE (switch_stack->switch_stmt),
2856 low_value, high_value);
2858 /* After labels, make any new cleanups in the function go into their
2859 own new (temporary) binding contour. */
2860 for (p = current_binding_level;
2861 p->kind != sk_function_parms;
2863 p->more_cleanups_ok = 0;
2868 /* Hash a TYPENAME_TYPE. K is really of type `tree'. */
2871 typename_hash (const void* k)
2874 const_tree const t = (const_tree) k;
2876 hash = (htab_hash_pointer (TYPE_CONTEXT (t))
2877 ^ htab_hash_pointer (DECL_NAME (TYPE_NAME (t))));
2882 typedef struct typename_info {
2890 /* Compare two TYPENAME_TYPEs. K1 is really of type `tree', K2 is
2891 really of type `typename_info*' */
2894 typename_compare (const void * k1, const void * k2)
2896 const_tree const t1 = (const_tree) k1;
2897 const typename_info *const t2 = (const typename_info *) k2;
2899 return (DECL_NAME (TYPE_NAME (t1)) == t2->name
2900 && TYPE_CONTEXT (t1) == t2->scope
2901 && TYPENAME_TYPE_FULLNAME (t1) == t2->template_id
2902 && TYPENAME_IS_ENUM_P (t1) == t2->enum_p
2903 && TYPENAME_IS_CLASS_P (t1) == t2->class_p);
2906 /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
2907 the type of `T', NAME is the IDENTIFIER_NODE for `t'.
2909 Returns the new TYPENAME_TYPE. */
2911 static GTY ((param_is (union tree_node))) htab_t typename_htab;
2914 build_typename_type (tree context, tree name, tree fullname,
2915 enum tag_types tag_type)
2923 if (typename_htab == NULL)
2924 typename_htab = htab_create_ggc (61, &typename_hash,
2925 &typename_compare, NULL);
2927 ti.scope = FROB_CONTEXT (context);
2929 ti.template_id = fullname;
2930 ti.enum_p = tag_type == enum_type;
2931 ti.class_p = (tag_type == class_type
2932 || tag_type == record_type
2933 || tag_type == union_type);
2934 hash = (htab_hash_pointer (ti.scope)
2935 ^ htab_hash_pointer (ti.name));
2937 /* See if we already have this type. */
2938 e = htab_find_slot_with_hash (typename_htab, &ti, hash, INSERT);
2943 /* Build the TYPENAME_TYPE. */
2944 t = cxx_make_type (TYPENAME_TYPE);
2945 TYPE_CONTEXT (t) = ti.scope;
2946 TYPENAME_TYPE_FULLNAME (t) = ti.template_id;
2947 TYPENAME_IS_ENUM_P (t) = ti.enum_p;
2948 TYPENAME_IS_CLASS_P (t) = ti.class_p;
2950 /* Build the corresponding TYPE_DECL. */
2951 d = build_decl (input_location, TYPE_DECL, name, t);
2952 TYPE_NAME (TREE_TYPE (d)) = d;
2953 TYPE_STUB_DECL (TREE_TYPE (d)) = d;
2954 DECL_CONTEXT (d) = FROB_CONTEXT (context);
2955 DECL_ARTIFICIAL (d) = 1;
2957 /* Store it in the hash table. */
2960 /* TYPENAME_TYPEs must always be compared structurally, because
2961 they may or may not resolve down to another type depending on
2962 the currently open classes. */
2963 SET_TYPE_STRUCTURAL_EQUALITY (t);
2969 /* Resolve `typename CONTEXT::NAME'. TAG_TYPE indicates the tag
2970 provided to name the type. Returns an appropriate type, unless an
2971 error occurs, in which case error_mark_node is returned. If we
2972 locate a non-artificial TYPE_DECL and TF_KEEP_TYPE_DECL is set, we
2973 return that, rather than the _TYPE it corresponds to, in other
2974 cases we look through the type decl. If TF_ERROR is set, complain
2975 about errors, otherwise be quiet. */
2978 make_typename_type (tree context, tree name, enum tag_types tag_type,
2979 tsubst_flags_t complain)
2985 if (name == error_mark_node
2986 || context == NULL_TREE
2987 || context == error_mark_node)
2988 return error_mark_node;
2992 if (!(TYPE_LANG_SPECIFIC (name)
2993 && (CLASSTYPE_IS_TEMPLATE (name)
2994 || CLASSTYPE_USE_TEMPLATE (name))))
2995 name = TYPE_IDENTIFIER (name);
2997 /* Create a TEMPLATE_ID_EXPR for the type. */
2998 name = build_nt (TEMPLATE_ID_EXPR,
2999 CLASSTYPE_TI_TEMPLATE (name),
3000 CLASSTYPE_TI_ARGS (name));
3002 else if (TREE_CODE (name) == TYPE_DECL)
3003 name = DECL_NAME (name);
3007 if (TREE_CODE (name) == TEMPLATE_ID_EXPR)
3009 name = TREE_OPERAND (name, 0);
3010 if (TREE_CODE (name) == TEMPLATE_DECL)
3011 name = TREE_OPERAND (fullname, 0) = DECL_NAME (name);
3012 else if (TREE_CODE (name) == OVERLOAD)
3014 error ("%qD is not a type", name);
3015 return error_mark_node;
3018 if (TREE_CODE (name) == TEMPLATE_DECL)
3020 error ("%qD used without template parameters", name);
3021 return error_mark_node;
3023 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
3024 gcc_assert (TYPE_P (context));
3026 if (!MAYBE_CLASS_TYPE_P (context))
3028 if (complain & tf_error)
3029 error ("%q#T is not a class", context);
3030 return error_mark_node;
3033 /* When the CONTEXT is a dependent type, NAME could refer to a
3034 dependent base class of CONTEXT. But look inside it anyway
3035 if CONTEXT is a currently open scope, in case it refers to a
3036 member of the current instantiation or a non-dependent base;
3037 lookup will stop when we hit a dependent base. */
3038 if (!dependent_scope_p (context))
3039 /* We should only set WANT_TYPE when we're a nested typename type.
3040 Then we can give better diagnostics if we find a non-type. */
3041 t = lookup_field (context, name, 2, /*want_type=*/true);
3045 if ((!t || TREE_CODE (t) == TREE_LIST) && dependent_type_p (context))
3046 return build_typename_type (context, name, fullname, tag_type);
3048 want_template = TREE_CODE (fullname) == TEMPLATE_ID_EXPR;
3052 if (complain & tf_error)
3053 error (want_template ? "no class template named %q#T in %q#T"
3054 : "no type named %q#T in %q#T", name, context);
3055 return error_mark_node;
3058 /* Pull out the template from an injected-class-name (or multiple). */
3060 t = maybe_get_template_decl_from_type_decl (t);
3062 if (TREE_CODE (t) == TREE_LIST)
3064 if (complain & tf_error)
3066 error ("lookup of %qT in %qT is ambiguous", name, context);
3067 print_candidates (t);
3069 return error_mark_node;
3072 if (want_template && !DECL_CLASS_TEMPLATE_P (t))
3074 if (complain & tf_error)
3075 error ("%<typename %T::%D%> names %q#T, which is not a class template",
3077 return error_mark_node;
3079 if (!want_template && TREE_CODE (t) != TYPE_DECL)
3081 if (complain & tf_error)
3082 error ("%<typename %T::%D%> names %q#T, which is not a type",
3084 return error_mark_node;
3087 if (complain & tf_error)
3088 perform_or_defer_access_check (TYPE_BINFO (context), t, t);
3090 /* If we are currently parsing a template and if T is a typedef accessed
3091 through CONTEXT then we need to remember and check access of T at
3092 template instantiation time. */
3093 add_typedef_to_current_template_for_access_check (t, context, input_location);
3096 return lookup_template_class (t, TREE_OPERAND (fullname, 1),
3098 /*entering_scope=*/0,
3099 tf_warning_or_error | tf_user);
3101 if (DECL_ARTIFICIAL (t) || !(complain & tf_keep_type_decl))
3107 /* Resolve `CONTEXT::template NAME'. Returns a TEMPLATE_DECL if the name
3108 can be resolved or an UNBOUND_CLASS_TEMPLATE, unless an error occurs,
3109 in which case error_mark_node is returned.
3111 If PARM_LIST is non-NULL, also make sure that the template parameter
3112 list of TEMPLATE_DECL matches.
3114 If COMPLAIN zero, don't complain about any errors that occur. */
3117 make_unbound_class_template (tree context, tree name, tree parm_list,
3118 tsubst_flags_t complain)
3124 name = TYPE_IDENTIFIER (name);
3125 else if (DECL_P (name))
3126 name = DECL_NAME (name);
3127 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
3129 if (!dependent_type_p (context)
3130 || currently_open_class (context))
3132 tree tmpl = NULL_TREE;
3134 if (MAYBE_CLASS_TYPE_P (context))
3135 tmpl = lookup_field (context, name, 0, false);
3137 if (!tmpl || !DECL_CLASS_TEMPLATE_P (tmpl))
3139 if (complain & tf_error)
3140 error ("no class template named %q#T in %q#T", name, context);
3141 return error_mark_node;
3145 && !comp_template_parms (DECL_TEMPLATE_PARMS (tmpl), parm_list))
3147 if (complain & tf_error)
3149 error ("template parameters do not match template");
3150 error ("%q+D declared here", tmpl);
3152 return error_mark_node;
3155 if (complain & tf_error)
3156 perform_or_defer_access_check (TYPE_BINFO (context), tmpl, tmpl);
3161 /* Build the UNBOUND_CLASS_TEMPLATE. */
3162 t = cxx_make_type (UNBOUND_CLASS_TEMPLATE);
3163 TYPE_CONTEXT (t) = FROB_CONTEXT (context);
3164 TREE_TYPE (t) = NULL_TREE;
3165 SET_TYPE_STRUCTURAL_EQUALITY (t);
3167 /* Build the corresponding TEMPLATE_DECL. */
3168 d = build_decl (input_location, TEMPLATE_DECL, name, t);
3169 TYPE_NAME (TREE_TYPE (d)) = d;
3170 TYPE_STUB_DECL (TREE_TYPE (d)) = d;
3171 DECL_CONTEXT (d) = FROB_CONTEXT (context);
3172 DECL_ARTIFICIAL (d) = 1;
3173 DECL_TEMPLATE_PARMS (d) = parm_list;
3180 /* Push the declarations of builtin types into the namespace.
3181 RID_INDEX is the index of the builtin type in the array
3182 RID_POINTERS. NAME is the name used when looking up the builtin
3183 type. TYPE is the _TYPE node for the builtin type. */
3186 record_builtin_type (enum rid rid_index,
3190 tree rname = NULL_TREE, tname = NULL_TREE;
3191 tree tdecl = NULL_TREE;
3193 if ((int) rid_index < (int) RID_MAX)
3194 rname = ridpointers[(int) rid_index];
3196 tname = get_identifier (name);
3198 /* The calls to SET_IDENTIFIER_GLOBAL_VALUE below should be
3199 eliminated. Built-in types should not be looked up name; their
3200 names are keywords that the parser can recognize. However, there
3201 is code in c-common.c that uses identifier_global_value to look
3202 up built-in types by name. */
3205 tdecl = build_decl (BUILTINS_LOCATION, TYPE_DECL, tname, type);
3206 DECL_ARTIFICIAL (tdecl) = 1;
3207 SET_IDENTIFIER_GLOBAL_VALUE (tname, tdecl);
3213 tdecl = build_decl (BUILTINS_LOCATION, TYPE_DECL, rname, type);
3214 DECL_ARTIFICIAL (tdecl) = 1;
3216 SET_IDENTIFIER_GLOBAL_VALUE (rname, tdecl);
3219 if (!TYPE_NAME (type))
3220 TYPE_NAME (type) = tdecl;
3223 debug_hooks->type_decl (tdecl, 0);
3226 /* Record one of the standard Java types.
3227 * Declare it as having the given NAME.
3228 * If SIZE > 0, it is the size of one of the integral types;
3229 * otherwise it is the negative of the size of one of the other types. */
3232 record_builtin_java_type (const char* name, int size)
3236 type = build_nonstandard_integer_type (size, 0);
3237 else if (size > -32)
3240 /* "__java_char" or ""__java_boolean". */
3241 type = build_nonstandard_integer_type (-size, 1);
3242 /* Get the signed type cached and attached to the unsigned type,
3243 so it doesn't get garbage-collected at "random" times,
3244 causing potential codegen differences out of different UIDs
3245 and different alias set numbers. */
3246 stype = build_nonstandard_integer_type (-size, 0);
3247 TREE_CHAIN (type) = stype;
3248 /*if (size == -1) TREE_SET_CODE (type, BOOLEAN_TYPE);*/
3251 { /* "__java_float" or ""__java_double". */
3252 type = make_node (REAL_TYPE);
3253 TYPE_PRECISION (type) = - size;
3256 record_builtin_type (RID_MAX, name, type);
3257 decl = TYPE_NAME (type);
3259 /* Suppress generate debug symbol entries for these types,
3260 since for normal C++ they are just clutter.
3261 However, push_lang_context undoes this if extern "Java" is seen. */
3262 DECL_IGNORED_P (decl) = 1;
3264 TYPE_FOR_JAVA (type) = 1;
3268 /* Push a type into the namespace so that the back ends ignore it. */
3271 record_unknown_type (tree type, const char* name)
3273 tree decl = pushdecl (build_decl (UNKNOWN_LOCATION,
3274 TYPE_DECL, get_identifier (name), type));
3275 /* Make sure the "unknown type" typedecl gets ignored for debug info. */
3276 DECL_IGNORED_P (decl) = 1;
3277 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
3278 TYPE_SIZE (type) = TYPE_SIZE (void_type_node);
3279 TYPE_ALIGN (type) = 1;
3280 TYPE_USER_ALIGN (type) = 0;
3281 SET_TYPE_MODE (type, TYPE_MODE (void_type_node));
3284 /* A string for which we should create an IDENTIFIER_NODE at
3287 typedef struct predefined_identifier
3289 /* The name of the identifier. */
3290 const char *const name;
3291 /* The place where the IDENTIFIER_NODE should be stored. */
3293 /* Nonzero if this is the name of a constructor or destructor. */
3294 const int ctor_or_dtor_p;
3295 } predefined_identifier;
3297 /* Create all the predefined identifiers. */
3300 initialize_predefined_identifiers (void)
3302 const predefined_identifier *pid;
3304 /* A table of identifiers to create at startup. */
3305 static const predefined_identifier predefined_identifiers[] = {
3306 { "C++", &lang_name_cplusplus, 0 },
3307 { "C", &lang_name_c, 0 },
3308 { "Java", &lang_name_java, 0 },
3309 /* Some of these names have a trailing space so that it is
3310 impossible for them to conflict with names written by users. */
3311 { "__ct ", &ctor_identifier, 1 },
3312 { "__base_ctor ", &base_ctor_identifier, 1 },
3313 { "__comp_ctor ", &complete_ctor_identifier, 1 },
3314 { "__dt ", &dtor_identifier, 1 },
3315 { "__comp_dtor ", &complete_dtor_identifier, 1 },
3316 { "__base_dtor ", &base_dtor_identifier, 1 },
3317 { "__deleting_dtor ", &deleting_dtor_identifier, 1 },
3318 { IN_CHARGE_NAME, &in_charge_identifier, 0 },
3319 { "nelts", &nelts_identifier, 0 },
3320 { THIS_NAME, &this_identifier, 0 },
3321 { VTABLE_DELTA_NAME, &delta_identifier, 0 },
3322 { VTABLE_PFN_NAME, &pfn_identifier, 0 },
3323 { "_vptr", &vptr_identifier, 0 },
3324 { "__vtt_parm", &vtt_parm_identifier, 0 },
3325 { "::", &global_scope_name, 0 },
3326 { "std", &std_identifier, 0 },
3330 for (pid = predefined_identifiers; pid->name; ++pid)
3332 *pid->node = get_identifier (pid->name);
3333 if (pid->ctor_or_dtor_p)
3334 IDENTIFIER_CTOR_OR_DTOR_P (*pid->node) = 1;
3338 /* Create the predefined scalar types of C,
3339 and some nodes representing standard constants (0, 1, (void *)0).
3340 Initialize the global binding level.
3341 Make definitions for built-in primitive functions. */
3344 cxx_init_decl_processing (void)
3347 tree void_ftype_ptr;
3349 build_common_tree_nodes (flag_signed_char, false);
3351 /* Create all the identifiers we need. */
3352 initialize_predefined_identifiers ();
3354 /* Create the global variables. */
3355 push_to_top_level ();
3357 current_function_decl = NULL_TREE;
3358 current_binding_level = NULL;
3359 /* Enter the global namespace. */
3360 gcc_assert (global_namespace == NULL_TREE);
3361 global_namespace = build_lang_decl (NAMESPACE_DECL, global_scope_name,
3363 TREE_PUBLIC (global_namespace) = 1;
3364 begin_scope (sk_namespace, global_namespace);
3366 current_lang_name = NULL_TREE;
3368 if (flag_visibility_ms_compat)
3369 default_visibility = VISIBILITY_HIDDEN;
3372 current_lang_name = lang_name_c;
3374 /* Create the `std' namespace. */
3375 push_namespace (std_identifier);
3376 std_node = current_namespace;
3379 c_common_nodes_and_builtins ();
3381 java_byte_type_node = record_builtin_java_type ("__java_byte", 8);
3382 java_short_type_node = record_builtin_java_type ("__java_short", 16);
3383 java_int_type_node = record_builtin_java_type ("__java_int", 32);
3384 java_long_type_node = record_builtin_java_type ("__java_long", 64);
3385 java_float_type_node = record_builtin_java_type ("__java_float", -32);
3386 java_double_type_node = record_builtin_java_type ("__java_double", -64);
3387 java_char_type_node = record_builtin_java_type ("__java_char", -16);
3388 java_boolean_type_node = record_builtin_java_type ("__java_boolean", -1);
3390 integer_two_node = build_int_cst (NULL_TREE, 2);
3391 integer_three_node = build_int_cst (NULL_TREE, 3);
3393 record_builtin_type (RID_BOOL, "bool", boolean_type_node);
3394 truthvalue_type_node = boolean_type_node;
3395 truthvalue_false_node = boolean_false_node;
3396 truthvalue_true_node = boolean_true_node;
3398 empty_except_spec = build_tree_list (NULL_TREE, NULL_TREE);
3401 record_builtin_type (RID_MAX, NULL, string_type_node);
3404 delta_type_node = ptrdiff_type_node;
3405 vtable_index_type = ptrdiff_type_node;
3407 vtt_parm_type = build_pointer_type (const_ptr_type_node);
3408 void_ftype = build_function_type (void_type_node, void_list_node);
3409 void_ftype_ptr = build_function_type (void_type_node,
3410 tree_cons (NULL_TREE,
3414 = build_exception_variant (void_ftype_ptr, empty_except_spec);
3416 /* C++ extensions */
3418 unknown_type_node = make_node (UNKNOWN_TYPE);
3419 record_unknown_type (unknown_type_node, "unknown type");
3421 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
3422 TREE_TYPE (unknown_type_node) = unknown_type_node;
3424 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
3426 TYPE_POINTER_TO (unknown_type_node) = unknown_type_node;
3427 TYPE_REFERENCE_TO (unknown_type_node) = unknown_type_node;
3429 init_list_type_node = make_node (UNKNOWN_TYPE);
3430 record_unknown_type (init_list_type_node, "init list");
3433 /* Make sure we get a unique function type, so we can give
3434 its pointer type a name. (This wins for gdb.) */
3435 tree vfunc_type = make_node (FUNCTION_TYPE);
3436 TREE_TYPE (vfunc_type) = integer_type_node;
3437 TYPE_ARG_TYPES (vfunc_type) = NULL_TREE;
3438 layout_type (vfunc_type);
3440 vtable_entry_type = build_pointer_type (vfunc_type);
3442 record_builtin_type (RID_MAX, VTBL_PTR_TYPE, vtable_entry_type);
3445 = build_cplus_array_type (vtable_entry_type, NULL_TREE);
3446 layout_type (vtbl_type_node);
3447 vtbl_type_node = build_qualified_type (vtbl_type_node, TYPE_QUAL_CONST);
3448 record_builtin_type (RID_MAX, NULL, vtbl_type_node);
3449 vtbl_ptr_type_node = build_pointer_type (vtable_entry_type);
3450 layout_type (vtbl_ptr_type_node);
3451 record_builtin_type (RID_MAX, NULL, vtbl_ptr_type_node);
3453 push_namespace (get_identifier ("__cxxabiv1"));
3454 abi_node = current_namespace;
3457 global_type_node = make_node (LANG_TYPE);
3458 record_unknown_type (global_type_node, "global type");
3461 current_lang_name = lang_name_cplusplus;
3465 tree bad_alloc_type_node;
3466 tree bad_alloc_decl;
3467 tree newtype, deltype;
3468 tree ptr_ftype_sizetype;
3470 push_namespace (std_identifier);
3471 bad_alloc_id = get_identifier ("bad_alloc");
3472 bad_alloc_type_node = make_class_type (RECORD_TYPE);
3473 TYPE_CONTEXT (bad_alloc_type_node) = current_namespace;
3475 = create_implicit_typedef (bad_alloc_id, bad_alloc_type_node);
3476 DECL_CONTEXT (bad_alloc_decl) = current_namespace;
3480 = build_function_type (ptr_type_node,
3481 tree_cons (NULL_TREE,
3484 newtype = build_exception_variant
3485 (ptr_ftype_sizetype, add_exception_specifier
3486 (NULL_TREE, bad_alloc_type_node, -1));
3487 deltype = build_exception_variant (void_ftype_ptr, empty_except_spec);
3488 push_cp_library_fn (NEW_EXPR, newtype);
3489 push_cp_library_fn (VEC_NEW_EXPR, newtype);
3490 global_delete_fndecl = push_cp_library_fn (DELETE_EXPR, deltype);
3491 push_cp_library_fn (VEC_DELETE_EXPR, deltype);
3495 = build_library_fn_ptr ("__cxa_pure_virtual", void_ftype);
3497 /* Perform other language dependent initializations. */
3498 init_class_processing ();
3499 init_rtti_processing ();
3500 init_template_processing ();
3502 if (flag_exceptions)
3503 init_exception_processing ();
3505 if (! supports_one_only ())
3508 make_fname_decl = cp_make_fname_decl;
3509 start_fname_decls ();
3511 /* Show we use EH for cleanups. */
3512 if (flag_exceptions)
3513 using_eh_for_cleanups ();
3516 /* Generate an initializer for a function naming variable from
3517 NAME. NAME may be NULL, to indicate a dependent name. TYPE_P is
3518 filled in with the type of the init. */
3521 cp_fname_init (const char* name, tree *type_p)
3523 tree domain = NULL_TREE;
3525 tree init = NULL_TREE;
3530 length = strlen (name);
3531 domain = build_index_type (size_int (length));
3532 init = build_string (length + 1, name);
3535 type = build_qualified_type (char_type_node, TYPE_QUAL_CONST);
3536 type = build_cplus_array_type (type, domain);
3541 TREE_TYPE (init) = type;
3543 init = error_mark_node;
3548 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give
3549 the decl, LOC is the location to give the decl, NAME is the
3550 initialization string and TYPE_DEP indicates whether NAME depended
3551 on the type of the function. We make use of that to detect
3552 __PRETTY_FUNCTION__ inside a template fn. This is being done lazily
3553 at the point of first use, so we mustn't push the decl now. */
3556 cp_make_fname_decl (location_t loc, tree id, int type_dep)
3558 const char *const name = (type_dep && processing_template_decl
3559 ? NULL : fname_as_string (type_dep));
3561 tree init = cp_fname_init (name, &type);
3562 tree decl = build_decl (loc, VAR_DECL, id, type);
3565 free (CONST_CAST (char *, name));
3567 /* As we're using pushdecl_with_scope, we must set the context. */
3568 DECL_CONTEXT (decl) = current_function_decl;
3569 DECL_PRETTY_FUNCTION_P (decl) = type_dep;
3571 TREE_STATIC (decl) = 1;
3572 TREE_READONLY (decl) = 1;
3573 DECL_ARTIFICIAL (decl) = 1;
3575 TREE_USED (decl) = 1;
3577 if (current_function_decl)
3579 struct cp_binding_level *b = current_binding_level;
3580 while (b->level_chain->kind != sk_function_parms)
3582 pushdecl_with_scope (decl, b, /*is_friend=*/false);
3583 cp_finish_decl (decl, init, /*init_const_expr_p=*/false, NULL_TREE,
3584 LOOKUP_ONLYCONVERTING);
3587 pushdecl_top_level_and_finish (decl, init);
3593 builtin_function_1 (tree decl, tree context, bool is_global)
3595 tree id = DECL_NAME (decl);
3596 const char *name = IDENTIFIER_POINTER (id);
3598 retrofit_lang_decl (decl);
3600 DECL_ARTIFICIAL (decl) = 1;
3601 SET_OVERLOADED_OPERATOR_CODE (decl, ERROR_MARK);
3602 SET_DECL_LANGUAGE (decl, lang_c);
3603 /* Runtime library routines are, by definition, available in an
3604 external shared object. */
3605 DECL_VISIBILITY (decl) = VISIBILITY_DEFAULT;
3606 DECL_VISIBILITY_SPECIFIED (decl) = 1;
3608 DECL_CONTEXT (decl) = context;
3611 pushdecl_top_level (decl);
3615 /* A function in the user's namespace should have an explicit
3616 declaration before it is used. Mark the built-in function as
3617 anticipated but not actually declared. */
3618 if (name[0] != '_' || name[1] != '_')
3619 DECL_ANTICIPATED (decl) = 1;
3620 else if (strncmp (name + 2, "builtin_", strlen ("builtin_")) != 0)
3622 size_t len = strlen (name);
3624 /* Treat __*_chk fortification functions as anticipated as well,
3625 unless they are __builtin_*. */
3626 if (len > strlen ("___chk")
3627 && memcmp (name + len - strlen ("_chk"),
3628 "_chk", strlen ("_chk") + 1) == 0)
3629 DECL_ANTICIPATED (decl) = 1;
3636 cxx_builtin_function (tree decl)
3638 tree id = DECL_NAME (decl);
3639 const char *name = IDENTIFIER_POINTER (id);
3640 /* All builtins that don't begin with an '_' should additionally
3641 go in the 'std' namespace. */
3644 tree decl2 = copy_node(decl);
3645 push_namespace (std_identifier);
3646 builtin_function_1 (decl2, std_node, false);
3650 return builtin_function_1 (decl, NULL_TREE, false);
3653 /* Like cxx_builtin_function, but guarantee the function is added to the global
3654 scope. This is to allow function specific options to add new machine
3655 dependent builtins when the target ISA changes via attribute((target(...)))
3656 which saves space on program startup if the program does not use non-generic
3660 cxx_builtin_function_ext_scope (tree decl)
3663 tree id = DECL_NAME (decl);
3664 const char *name = IDENTIFIER_POINTER (id);
3665 /* All builtins that don't begin with an '_' should additionally
3666 go in the 'std' namespace. */
3669 tree decl2 = copy_node(decl);
3670 push_namespace (std_identifier);
3671 builtin_function_1 (decl2, std_node, true);
3675 return builtin_function_1 (decl, NULL_TREE, true);
3678 /* Generate a FUNCTION_DECL with the typical flags for a runtime library
3679 function. Not called directly. */
3682 build_library_fn_1 (tree name, enum tree_code operator_code, tree type)
3684 tree fn = build_lang_decl (FUNCTION_DECL, name, type);
3685 DECL_EXTERNAL (fn) = 1;
3686 TREE_PUBLIC (fn) = 1;
3687 DECL_ARTIFICIAL (fn) = 1;
3688 SET_OVERLOADED_OPERATOR_CODE (fn, operator_code);
3689 SET_DECL_LANGUAGE (fn, lang_c);
3690 /* Runtime library routines are, by definition, available in an
3691 external shared object. */
3692 DECL_VISIBILITY (fn) = VISIBILITY_DEFAULT;
3693 DECL_VISIBILITY_SPECIFIED (fn) = 1;
3697 /* Returns the _DECL for a library function with C linkage.
3698 We assume that such functions never throw; if this is incorrect,
3699 callers should unset TREE_NOTHROW. */
3702 build_library_fn (tree name, tree type)
3704 tree fn = build_library_fn_1 (name, ERROR_MARK, type);
3705 TREE_NOTHROW (fn) = 1;
3709 /* Returns the _DECL for a library function with C++ linkage. */
3712 build_cp_library_fn (tree name, enum tree_code operator_code, tree type)
3714 tree fn = build_library_fn_1 (name, operator_code, type);
3715 TREE_NOTHROW (fn) = TYPE_NOTHROW_P (type);
3716 DECL_CONTEXT (fn) = FROB_CONTEXT (current_namespace);
3717 SET_DECL_LANGUAGE (fn, lang_cplusplus);
3721 /* Like build_library_fn, but takes a C string instead of an
3725 build_library_fn_ptr (const char* name, tree type)
3727 return build_library_fn (get_identifier (name), type);
3730 /* Like build_cp_library_fn, but takes a C string instead of an
3734 build_cp_library_fn_ptr (const char* name, tree type)
3736 return build_cp_library_fn (get_identifier (name), ERROR_MARK, type);
3739 /* Like build_library_fn, but also pushes the function so that we will
3740 be able to find it via IDENTIFIER_GLOBAL_VALUE. Also, the function
3741 may throw exceptions listed in RAISES. */
3744 push_library_fn (tree name, tree type, tree raises)
3749 type = build_exception_variant (type, raises);
3751 fn = build_library_fn (name, type);
3752 pushdecl_top_level (fn);
3756 /* Like build_cp_library_fn, but also pushes the function so that it
3757 will be found by normal lookup. */
3760 push_cp_library_fn (enum tree_code operator_code, tree type)
3762 tree fn = build_cp_library_fn (ansi_opname (operator_code),
3769 /* Like push_library_fn, but takes a TREE_LIST of parm types rather than
3773 push_void_library_fn (tree name, tree parmtypes)
3775 tree type = build_function_type (void_type_node, parmtypes);
3776 return push_library_fn (name, type, NULL_TREE);
3779 /* Like push_library_fn, but also note that this function throws
3780 and does not return. Used for __throw_foo and the like. */
3783 push_throw_library_fn (tree name, tree type)
3785 tree fn = push_library_fn (name, type, NULL_TREE);
3786 TREE_THIS_VOLATILE (fn) = 1;
3787 TREE_NOTHROW (fn) = 0;
3791 /* When we call finish_struct for an anonymous union, we create
3792 default copy constructors and such. But, an anonymous union
3793 shouldn't have such things; this function undoes the damage to the
3794 anonymous union type T.
3796 (The reason that we create the synthesized methods is that we don't
3797 distinguish `union { int i; }' from `typedef union { int i; } U'.
3798 The first is an anonymous union; the second is just an ordinary
3802 fixup_anonymous_aggr (tree t)
3806 /* Wipe out memory of synthesized methods. */
3807 TYPE_HAS_USER_CONSTRUCTOR (t) = 0;
3808 TYPE_HAS_DEFAULT_CONSTRUCTOR (t) = 0;
3809 TYPE_HAS_INIT_REF (t) = 0;
3810 TYPE_HAS_CONST_INIT_REF (t) = 0;
3811 TYPE_HAS_ASSIGN_REF (t) = 0;
3812 TYPE_HAS_CONST_ASSIGN_REF (t) = 0;
3814 /* Splice the implicitly generated functions out of the TYPE_METHODS
3816 q = &TYPE_METHODS (t);
3819 if (DECL_ARTIFICIAL (*q))
3820 *q = TREE_CHAIN (*q);
3822 q = &TREE_CHAIN (*q);
3825 /* ISO C++ 9.5.3. Anonymous unions may not have function members. */
3826 if (TYPE_METHODS (t))
3828 tree decl = TYPE_MAIN_DECL (t);
3830 if (TREE_CODE (t) != UNION_TYPE)
3831 error_at (DECL_SOURCE_LOCATION (decl),
3832 "an anonymous struct cannot have function members");
3834 error_at (DECL_SOURCE_LOCATION (decl),
3835 "an anonymous union cannot have function members");
3838 /* Anonymous aggregates cannot have fields with ctors, dtors or complex
3839 assignment operators (because they cannot have these methods themselves).
3840 For anonymous unions this is already checked because they are not allowed
3841 in any union, otherwise we have to check it. */
3842 if (TREE_CODE (t) != UNION_TYPE)
3846 for (field = TYPE_FIELDS (t); field; field = TREE_CHAIN (field))
3847 if (TREE_CODE (field) == FIELD_DECL)
3849 type = TREE_TYPE (field);
3850 if (CLASS_TYPE_P (type))
3852 if (TYPE_NEEDS_CONSTRUCTING (type))
3853 error ("member %q+#D with constructor not allowed "
3854 "in anonymous aggregate", field);
3855 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
3856 error ("member %q+#D with destructor not allowed "
3857 "in anonymous aggregate", field);
3858 if (TYPE_HAS_COMPLEX_ASSIGN_REF (type))
3859 error ("member %q+#D with copy assignment operator "
3860 "not allowed in anonymous aggregate", field);
3866 /* Make sure that a declaration with no declarator is well-formed, i.e.
3867 just declares a tagged type or anonymous union.
3869 Returns the type declared; or NULL_TREE if none. */
3872 check_tag_decl (cp_decl_specifier_seq *declspecs)
3874 int saw_friend = declspecs->specs[(int)ds_friend] != 0;
3875 int saw_typedef = declspecs->specs[(int)ds_typedef] != 0;
3876 /* If a class, struct, or enum type is declared by the DECLSPECS
3877 (i.e, if a class-specifier, enum-specifier, or non-typename
3878 elaborated-type-specifier appears in the DECLSPECS),
3879 DECLARED_TYPE is set to the corresponding type. */
3880 tree declared_type = NULL_TREE;
3881 bool error_p = false;
3883 if (declspecs->multiple_types_p)
3884 error ("multiple types in one declaration");
3885 else if (declspecs->redefined_builtin_type)
3887 if (!in_system_header)
3888 permerror (input_location, "redeclaration of C++ built-in type %qT",
3889 declspecs->redefined_builtin_type);
3894 && TYPE_P (declspecs->type)
3895 && ((TREE_CODE (declspecs->type) != TYPENAME_TYPE
3896 && MAYBE_CLASS_TYPE_P (declspecs->type))
3897 || TREE_CODE (declspecs->type) == ENUMERAL_TYPE))
3898 declared_type = declspecs->type;
3899 else if (declspecs->type == error_mark_node)
3901 if (declared_type == NULL_TREE && ! saw_friend && !error_p)
3902 permerror (input_location, "declaration does not declare anything");
3903 /* Check for an anonymous union. */
3904 else if (declared_type && RECORD_OR_UNION_CODE_P (TREE_CODE (declared_type))
3905 && TYPE_ANONYMOUS_P (declared_type))
3907 /* 7/3 In a simple-declaration, the optional init-declarator-list
3908 can be omitted only when declaring a class (clause 9) or
3909 enumeration (7.2), that is, when the decl-specifier-seq contains
3910 either a class-specifier, an elaborated-type-specifier with
3911 a class-key (9.1), or an enum-specifier. In these cases and
3912 whenever a class-specifier or enum-specifier is present in the
3913 decl-specifier-seq, the identifiers in these specifiers are among
3914 the names being declared by the declaration (as class-name,
3915 enum-names, or enumerators, depending on the syntax). In such
3916 cases, and except for the declaration of an unnamed bit-field (9.6),
3917 the decl-specifier-seq shall introduce one or more names into the
3918 program, or shall redeclare a name introduced by a previous
3919 declaration. [Example:
3920 enum { }; // ill-formed
3921 typedef class { }; // ill-formed
3925 error ("missing type-name in typedef-declaration");
3928 /* Anonymous unions are objects, so they can have specifiers. */;
3929 SET_ANON_AGGR_TYPE_P (declared_type);
3931 if (TREE_CODE (declared_type) != UNION_TYPE && !in_system_header)
3932 pedwarn (input_location, OPT_pedantic, "ISO C++ prohibits anonymous structs");
3937 if (declspecs->specs[(int)ds_inline]
3938 || declspecs->specs[(int)ds_virtual])
3939 error ("%qs can only be specified for functions",
3940 declspecs->specs[(int)ds_inline]
3941 ? "inline" : "virtual");
3943 && (!current_class_type
3944 || current_scope () != current_class_type))
3945 error ("%<friend%> can only be specified inside a class");
3946 else if (declspecs->specs[(int)ds_explicit])
3947 error ("%<explicit%> can only be specified for constructors");
3948 else if (declspecs->storage_class)
3949 error ("a storage class can only be specified for objects "
3951 else if (declspecs->specs[(int)ds_const]
3952 || declspecs->specs[(int)ds_volatile]
3953 || declspecs->specs[(int)ds_restrict]
3954 || declspecs->specs[(int)ds_thread])
3955 error ("qualifiers can only be specified for objects "
3957 else if (saw_typedef)
3958 warning (0, "%<typedef%> was ignored in this declaration");
3959 else if (declspecs->specs[(int) ds_constexpr])
3960 error ("%<constexpr> cannot be used for type declarations");
3963 return declared_type;
3966 /* Called when a declaration is seen that contains no names to declare.
3967 If its type is a reference to a structure, union or enum inherited
3968 from a containing scope, shadow that tag name for the current scope
3969 with a forward reference.
3970 If its type defines a new named structure or union
3971 or defines an enum, it is valid but we need not do anything here.
3972 Otherwise, it is an error.
3974 C++: may have to grok the declspecs to learn about static,
3975 complain for anonymous unions.
3977 Returns the TYPE declared -- or NULL_TREE if none. */
3980 shadow_tag (cp_decl_specifier_seq *declspecs)
3982 tree t = check_tag_decl (declspecs);
3987 if (declspecs->attributes)
3989 warning (0, "attribute ignored in declaration of %q+#T", t);
3990 warning (0, "attribute for %q+#T must follow the %qs keyword",
3991 t, class_key_or_enum_as_string (t));
3995 if (maybe_process_partial_specialization (t) == error_mark_node)
3998 /* This is where the variables in an anonymous union are
3999 declared. An anonymous union declaration looks like:
4001 because there is no declarator after the union, the parser
4002 sends that declaration here. */
4003 if (ANON_AGGR_TYPE_P (t))
4005 fixup_anonymous_aggr (t);
4007 if (TYPE_FIELDS (t))
4009 tree decl = grokdeclarator (/*declarator=*/NULL,
4010 declspecs, NORMAL, 0, NULL);
4011 finish_anon_union (decl);
4018 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
4021 groktypename (cp_decl_specifier_seq *type_specifiers,
4022 const cp_declarator *declarator,
4023 bool is_template_arg)
4027 enum decl_context context
4028 = is_template_arg ? TEMPLATE_TYPE_ARG : TYPENAME;
4029 attrs = type_specifiers->attributes;
4030 type_specifiers->attributes = NULL_TREE;
4031 type = grokdeclarator (declarator, type_specifiers, context, 0, &attrs);
4032 if (attrs && type != error_mark_node)
4034 if (CLASS_TYPE_P (type))
4035 warning (OPT_Wattributes, "ignoring attributes applied to class type %qT "
4036 "outside of definition", type);
4037 else if (MAYBE_CLASS_TYPE_P (type))
4038 /* A template type parameter or other dependent type. */
4039 warning (OPT_Wattributes, "ignoring attributes applied to dependent "
4040 "type %qT without an associated declaration", type);
4042 cplus_decl_attributes (&type, attrs, 0);
4047 /* Process a DECLARATOR for a function-scope variable declaration,
4048 namespace-scope variable declaration, or function declaration.
4049 (Function definitions go through start_function; class member
4050 declarations appearing in the body of the class go through
4051 grokfield.) The DECL corresponding to the DECLARATOR is returned.
4052 If an error occurs, the error_mark_node is returned instead.
4054 DECLSPECS are the decl-specifiers for the declaration. INITIALIZED is
4055 SD_INITIALIZED if an explicit initializer is present, or SD_DEFAULTED
4056 for an explicitly defaulted function, or SD_DELETED for an explicitly
4057 deleted function, but 0 (SD_UNINITIALIZED) if this is a variable
4058 implicitly initialized via a default constructor. ATTRIBUTES and
4059 PREFIX_ATTRIBUTES are GNU attributes associated with this declaration.
4060 *PUSHED_SCOPE_P is set to the scope entered in this function, if any; if
4061 set, the caller is responsible for calling pop_scope. */
4064 start_decl (const cp_declarator *declarator,
4065 cp_decl_specifier_seq *declspecs,
4068 tree prefix_attributes,
4069 tree *pushed_scope_p)
4076 *pushed_scope_p = NULL_TREE;
4078 /* An object declared as __attribute__((deprecated)) suppresses
4079 warnings of uses of other deprecated items. */
4080 if (lookup_attribute ("deprecated", attributes))
4081 deprecated_state = DEPRECATED_SUPPRESS;
4083 attributes = chainon (attributes, prefix_attributes);
4085 decl = grokdeclarator (declarator, declspecs, NORMAL, initialized,
4088 deprecated_state = DEPRECATED_NORMAL;
4090 if (decl == NULL_TREE || TREE_CODE (decl) == VOID_TYPE
4091 || decl == error_mark_node)
4092 return error_mark_node;
4094 context = DECL_CONTEXT (decl);
4098 *pushed_scope_p = push_scope (context);
4100 /* We are only interested in class contexts, later. */
4101 if (TREE_CODE (context) == NAMESPACE_DECL)
4102 context = NULL_TREE;
4106 /* Is it valid for this decl to have an initializer at all?
4107 If not, set INITIALIZED to zero, which will indirectly
4108 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
4109 switch (TREE_CODE (decl))
4112 error ("typedef %qD is initialized (use decltype instead)", decl);
4113 return error_mark_node;
4116 if (initialized == SD_DELETED)
4117 /* We'll handle the rest of the semantics later, but we need to
4118 set this now so it's visible to duplicate_decls. */
4119 DECL_DELETED_FN (decl) = 1;
4128 if (! toplevel_bindings_p ()
4129 && DECL_EXTERNAL (decl))
4130 warning (0, "declaration of %q#D has %<extern%> and is initialized",
4132 DECL_EXTERNAL (decl) = 0;
4133 if (toplevel_bindings_p ())
4134 TREE_STATIC (decl) = 1;
4137 /* If this is a typedef that names the class for linkage purposes
4138 (7.1.3p8), apply any attributes directly to the type. */
4139 if (TREE_CODE (decl) == TYPE_DECL
4140 && TAGGED_TYPE_P (TREE_TYPE (decl))
4141 && decl == TYPE_NAME (TYPE_MAIN_VARIANT (TREE_TYPE (decl))))
4142 flags = ATTR_FLAG_TYPE_IN_PLACE;
4146 /* Set attributes here so if duplicate decl, will have proper attributes. */
4147 cplus_decl_attributes (&decl, attributes, flags);
4149 /* Dllimported symbols cannot be defined. Static data members (which
4150 can be initialized in-class and dllimported) go through grokfield,
4151 not here, so we don't need to exclude those decls when checking for
4153 if (initialized && DECL_DLLIMPORT_P (decl))
4155 error ("definition of %q#D is marked %<dllimport%>", decl);
4156 DECL_DLLIMPORT_P (decl) = 0;
4159 /* If #pragma weak was used, mark the decl weak now. */
4160 maybe_apply_pragma_weak (decl);
4162 if (TREE_CODE (decl) == FUNCTION_DECL
4163 && DECL_DECLARED_INLINE_P (decl)
4164 && DECL_UNINLINABLE (decl)
4165 && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl)))
4166 warning (0, "inline function %q+D given attribute noinline", decl);
4168 if (context && COMPLETE_TYPE_P (complete_type (context)))
4170 if (TREE_CODE (decl) == VAR_DECL)
4172 tree field = lookup_field (context, DECL_NAME (decl), 0, false);
4173 if (field == NULL_TREE || TREE_CODE (field) != VAR_DECL)
4174 error ("%q#D is not a static member of %q#T", decl, context);
4177 if (DECL_CONTEXT (field) != context)
4179 if (!same_type_p (DECL_CONTEXT (field), context))
4180 permerror (input_location, "ISO C++ does not permit %<%T::%D%> "
4181 "to be defined as %<%T::%D%>",
4182 DECL_CONTEXT (field), DECL_NAME (decl),
4183 context, DECL_NAME (decl));
4184 DECL_CONTEXT (decl) = DECL_CONTEXT (field);
4186 if (processing_specialization
4187 && template_class_depth (context) == 0
4188 && CLASSTYPE_TEMPLATE_SPECIALIZATION (context))
4189 error ("template header not allowed in member definition "
4190 "of explicitly specialized class");
4191 /* Static data member are tricky; an in-class initialization
4192 still doesn't provide a definition, so the in-class
4193 declaration will have DECL_EXTERNAL set, but will have an
4194 initialization. Thus, duplicate_decls won't warn
4195 about this situation, and so we check here. */
4196 if (initialized && DECL_INITIALIZED_IN_CLASS_P (field))
4197 error ("duplicate initialization of %qD", decl);
4198 if (duplicate_decls (decl, field, /*newdecl_is_friend=*/false))
4200 if (declspecs->specs[(int) ds_constexpr]
4201 && !DECL_DECLARED_CONSTEXPR_P (field))
4202 error ("%qD declared %<constexpr%> outside its class", field);
4207 tree field = check_classfn (context, decl,
4208 (processing_template_decl
4209 > template_class_depth (context))
4210 ? current_template_parms
4212 if (field && field != error_mark_node
4213 && duplicate_decls (decl, field,
4214 /*newdecl_is_friend=*/false))
4218 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
4219 DECL_IN_AGGR_P (decl) = 0;
4220 /* Do not mark DECL as an explicit specialization if it was not
4221 already marked as an instantiation; a declaration should
4222 never be marked as a specialization unless we know what
4223 template is being specialized. */
4224 if (DECL_LANG_SPECIFIC (decl) && DECL_USE_TEMPLATE (decl))
4226 SET_DECL_TEMPLATE_SPECIALIZATION (decl);
4228 /* [temp.expl.spec] An explicit specialization of a static data
4229 member of a template is a definition if the declaration
4230 includes an initializer; otherwise, it is a declaration.
4232 We check for processing_specialization so this only applies
4233 to the new specialization syntax. */
4234 if (!initialized && processing_specialization)
4235 DECL_EXTERNAL (decl) = 1;
4238 if (DECL_EXTERNAL (decl) && ! DECL_TEMPLATE_SPECIALIZATION (decl))
4239 permerror (input_location, "declaration of %q#D outside of class is not definition",
4242 if (!ensure_literal_type_for_constexpr_object (decl))
4243 return error_mark_node;
4246 was_public = TREE_PUBLIC (decl);
4248 /* Enter this declaration into the symbol table. */
4249 decl = maybe_push_decl (decl);
4251 if (processing_template_decl)
4252 decl = push_template_decl (decl);
4253 if (decl == error_mark_node)
4254 return error_mark_node;
4256 /* Tell the back end to use or not use .common as appropriate. If we say
4257 -fconserve-space, we want this to save .data space, at the expense of
4258 wrong semantics. If we say -fno-conserve-space, we want this to
4259 produce errors about redefs; to do this we force variables into the
4261 if (flag_conserve_space
4262 && TREE_CODE (decl) == VAR_DECL
4263 && TREE_PUBLIC (decl)
4264 && !DECL_THREAD_LOCAL_P (decl)
4265 && !have_global_bss_p ())
4266 DECL_COMMON (decl) = 1;
4268 if (TREE_CODE (decl) == VAR_DECL
4269 && DECL_NAMESPACE_SCOPE_P (decl) && !TREE_PUBLIC (decl) && !was_public
4270 && !DECL_THIS_STATIC (decl) && !DECL_ARTIFICIAL (decl))
4272 /* This is a const variable with implicit 'static'. Set
4273 DECL_THIS_STATIC so we can tell it from variables that are
4274 !TREE_PUBLIC because of the anonymous namespace. */
4275 gcc_assert (cp_type_readonly (TREE_TYPE (decl)));
4276 DECL_THIS_STATIC (decl) = 1;
4279 if (!processing_template_decl && TREE_CODE (decl) == VAR_DECL)
4280 start_decl_1 (decl, initialized);
4285 /* Process the declaration of a variable DECL. INITIALIZED is true
4286 iff DECL is explicitly initialized. (INITIALIZED is false if the
4287 variable is initialized via an implicitly-called constructor.)
4288 This function must be called for ordinary variables (including, for
4289 example, implicit instantiations of templates), but must not be
4290 called for template declarations. */
4293 start_decl_1 (tree decl, bool initialized)
4297 bool aggregate_definition_p;
4299 gcc_assert (!processing_template_decl);
4301 if (error_operand_p (decl))
4304 gcc_assert (TREE_CODE (decl) == VAR_DECL);
4306 type = TREE_TYPE (decl);
4307 complete_p = COMPLETE_TYPE_P (type);
4308 aggregate_definition_p = MAYBE_CLASS_TYPE_P (type) && !DECL_EXTERNAL (decl);
4310 /* If an explicit initializer is present, or if this is a definition
4311 of an aggregate, then we need a complete type at this point.
4312 (Scalars are always complete types, so there is nothing to
4313 check.) This code just sets COMPLETE_P; errors (if necessary)
4314 are issued below. */
4315 if ((initialized || aggregate_definition_p)
4317 && COMPLETE_TYPE_P (complete_type (type)))
4320 /* We will not yet have set TREE_READONLY on DECL if the type
4321 was "const", but incomplete, before this point. But, now, we
4322 have a complete type, so we can try again. */
4323 cp_apply_type_quals_to_decl (cp_type_quals (type), decl);
4327 /* Is it valid for this decl to have an initializer at all? */
4329 /* Don't allow initializations for incomplete types except for
4330 arrays which might be completed by the initialization. */
4332 ; /* A complete type is ok. */
4333 else if (type_uses_auto (type))
4334 ; /* An auto type is ok. */
4335 else if (TREE_CODE (type) != ARRAY_TYPE)
4337 error ("variable %q#D has initializer but incomplete type", decl);
4338 type = TREE_TYPE (decl) = error_mark_node;
4340 else if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (type))))
4342 if (DECL_LANG_SPECIFIC (decl) && DECL_TEMPLATE_INFO (decl))
4343 error ("elements of array %q#D have incomplete type", decl);
4344 /* else we already gave an error in start_decl. */
4347 else if (aggregate_definition_p && !complete_p)
4349 if (type_uses_auto (type))
4350 error ("declaration of %q#D has no initializer", decl);
4352 error ("aggregate %q#D has incomplete type and cannot be defined",
4354 /* Change the type so that assemble_variable will give
4355 DECL an rtl we can live with: (mem (const_int 0)). */
4356 type = TREE_TYPE (decl) = error_mark_node;
4359 /* Create a new scope to hold this declaration if necessary.
4360 Whether or not a new scope is necessary cannot be determined
4361 until after the type has been completed; if the type is a
4362 specialization of a class template it is not until after
4363 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
4364 will be set correctly. */
4365 maybe_push_cleanup_level (type);
4368 /* Handle initialization of references. DECL, TYPE, and INIT have the
4369 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
4370 but will be set to a new CLEANUP_STMT if a temporary is created
4371 that must be destroyed subsequently.
4373 Returns an initializer expression to use to initialize DECL, or
4374 NULL if the initialization can be performed statically.
4376 Quotes on semantics can be found in ARM 8.4.3. */
4379 grok_reference_init (tree decl, tree type, tree init, tree *cleanup)
4383 if (init == NULL_TREE)
4385 if ((DECL_LANG_SPECIFIC (decl) == 0
4386 || DECL_IN_AGGR_P (decl) == 0)
4387 && ! DECL_THIS_EXTERN (decl))
4388 error ("%qD declared as reference but not initialized", decl);
4392 if (TREE_CODE (init) == TREE_LIST)
4393 init = build_x_compound_expr_from_list (init, "initializer");
4395 if (TREE_CODE (TREE_TYPE (type)) != ARRAY_TYPE
4396 && TREE_CODE (TREE_TYPE (init)) == ARRAY_TYPE)
4397 /* Note: default conversion is only called in very special cases. */
4398 init = decay_conversion (init);
4400 /* Convert INIT to the reference type TYPE. This may involve the
4401 creation of a temporary, whose lifetime must be the same as that
4402 of the reference. If so, a DECL_EXPR for the temporary will be
4403 added just after the DECL_EXPR for DECL. That's why we don't set
4404 DECL_INITIAL for local references (instead assigning to them
4405 explicitly); we need to allow the temporary to be initialized
4407 tmp = initialize_reference (type, init, decl, cleanup, tf_warning_or_error);
4409 if (tmp == error_mark_node)
4411 else if (tmp == NULL_TREE)
4413 error ("cannot initialize %qT from %qT", type, TREE_TYPE (init));
4417 if (TREE_STATIC (decl) && !TREE_CONSTANT (tmp))
4420 DECL_INITIAL (decl) = tmp;
4425 /* Subroutine of check_initializer. We're initializing a DECL of
4426 std::initializer_list<T> TYPE from a braced-init-list INIT, and need to
4427 extend the lifetime of the underlying array to match that of the decl,
4428 just like for reference initialization. CLEANUP is as for
4429 grok_reference_init. */
4432 build_init_list_var_init (tree decl, tree type, tree init, tree *cleanup)
4434 tree aggr_init, array, arrtype;
4435 init = perform_implicit_conversion (type, init, tf_warning_or_error);
4436 if (error_operand_p (init))
4437 return error_mark_node;
4439 aggr_init = TARGET_EXPR_INITIAL (init);
4440 init = build2 (INIT_EXPR, type, decl, init);
4442 array = AGGR_INIT_EXPR_ARG (aggr_init, 1);
4443 arrtype = TREE_TYPE (array);
4445 gcc_assert (TREE_CODE (array) == ADDR_EXPR);
4446 array = TREE_OPERAND (array, 0);
4447 /* If the array is constant, finish_compound_literal already made it a
4448 static variable and we don't need to do anything here. */
4449 if (decl && TREE_CODE (array) == TARGET_EXPR)
4452 tree var = set_up_extended_ref_temp (decl, array, cleanup, &subinit);
4453 var = build_address (var);
4454 var = convert (arrtype, var);
4455 AGGR_INIT_EXPR_ARG (aggr_init, 1) = var;
4456 init = build2 (COMPOUND_EXPR, TREE_TYPE (init), subinit, init);
4461 /* Designated initializers in arrays are not supported in GNU C++.
4462 The parser cannot detect this error since it does not know whether
4463 a given brace-enclosed initializer is for a class type or for an
4464 array. This function checks that CE does not use a designated
4465 initializer. If it does, an error is issued. Returns true if CE
4466 is valid, i.e., does not have a designated initializer. */
4469 check_array_designated_initializer (const constructor_elt *ce)
4471 /* Designated initializers for array elements are not supported. */
4474 /* The parser only allows identifiers as designated
4476 if (ce->index == error_mark_node)
4477 error ("name used in a GNU-style designated "
4478 "initializer for an array");
4481 gcc_assert (TREE_CODE (ce->index) == IDENTIFIER_NODE);
4482 error ("name %qD used in a GNU-style designated "
4483 "initializer for an array", ce->index);
4491 /* When parsing `int a[] = {1, 2};' we don't know the size of the
4492 array until we finish parsing the initializer. If that's the
4493 situation we're in, update DECL accordingly. */
4496 maybe_deduce_size_from_array_init (tree decl, tree init)
4498 tree type = TREE_TYPE (decl);
4500 if (TREE_CODE (type) == ARRAY_TYPE
4501 && TYPE_DOMAIN (type) == NULL_TREE
4502 && TREE_CODE (decl) != TYPE_DECL)
4504 /* do_default is really a C-ism to deal with tentative definitions.
4505 But let's leave it here to ease the eventual merge. */
4506 int do_default = !DECL_EXTERNAL (decl);
4507 tree initializer = init ? init : DECL_INITIAL (decl);
4510 /* Check that there are no designated initializers in INIT, as
4511 those are not supported in GNU C++, and as the middle-end
4512 will crash if presented with a non-numeric designated
4514 if (initializer && TREE_CODE (initializer) == CONSTRUCTOR)
4516 VEC(constructor_elt,gc) *v = CONSTRUCTOR_ELTS (initializer);
4517 constructor_elt *ce;
4520 VEC_iterate (constructor_elt, v, i, ce);
4522 if (!check_array_designated_initializer (ce))
4528 failure = cp_complete_array_type (&TREE_TYPE (decl), initializer,
4532 error ("initializer fails to determine size of %qD", decl);
4533 TREE_TYPE (decl) = error_mark_node;
4535 else if (failure == 2)
4539 error ("array size missing in %qD", decl);
4540 TREE_TYPE (decl) = error_mark_node;
4542 /* If a `static' var's size isn't known, make it extern as
4543 well as static, so it does not get allocated. If it's not
4544 `static', then don't mark it extern; finish_incomplete_decl
4545 will give it a default size and it will get allocated. */
4546 else if (!pedantic && TREE_STATIC (decl) && !TREE_PUBLIC (decl))
4547 DECL_EXTERNAL (decl) = 1;
4549 else if (failure == 3)
4551 error ("zero-size array %qD", decl);
4552 TREE_TYPE (decl) = error_mark_node;
4556 cp_apply_type_quals_to_decl (cp_type_quals (TREE_TYPE (decl)), decl);
4558 relayout_decl (decl);
4562 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
4563 any appropriate error messages regarding the layout. */
4566 layout_var_decl (tree decl)
4570 type = TREE_TYPE (decl);
4571 if (type == error_mark_node)
4574 /* If we haven't already layed out this declaration, do so now.
4575 Note that we must not call complete type for an external object
4576 because it's type might involve templates that we are not
4577 supposed to instantiate yet. (And it's perfectly valid to say
4578 `extern X x' for some incomplete type `X'.) */
4579 if (!DECL_EXTERNAL (decl))
4580 complete_type (type);
4581 if (!DECL_SIZE (decl)
4582 && TREE_TYPE (decl) != error_mark_node
4583 && (COMPLETE_TYPE_P (type)
4584 || (TREE_CODE (type) == ARRAY_TYPE
4585 && !TYPE_DOMAIN (type)
4586 && COMPLETE_TYPE_P (TREE_TYPE (type)))))
4587 layout_decl (decl, 0);
4589 if (!DECL_EXTERNAL (decl) && DECL_SIZE (decl) == NULL_TREE)
4591 /* An automatic variable with an incomplete type: that is an error.
4592 Don't talk about array types here, since we took care of that
4593 message in grokdeclarator. */
4594 error ("storage size of %qD isn't known", decl);
4595 TREE_TYPE (decl) = error_mark_node;
4598 /* Keep this code around in case we later want to control debug info
4599 based on whether a type is "used". (jason 1999-11-11) */
4601 else if (!DECL_EXTERNAL (decl) && MAYBE_CLASS_TYPE_P (ttype))
4602 /* Let debugger know it should output info for this type. */
4603 note_debug_info_needed (ttype);
4605 if (TREE_STATIC (decl) && DECL_CLASS_SCOPE_P (decl))
4606 note_debug_info_needed (DECL_CONTEXT (decl));
4609 if ((DECL_EXTERNAL (decl) || TREE_STATIC (decl))
4610 && DECL_SIZE (decl) != NULL_TREE
4611 && ! TREE_CONSTANT (DECL_SIZE (decl)))
4613 if (TREE_CODE (DECL_SIZE (decl)) == INTEGER_CST)
4614 constant_expression_warning (DECL_SIZE (decl));
4617 error ("storage size of %qD isn't constant", decl);
4618 TREE_TYPE (decl) = error_mark_node;
4623 /* If a local static variable is declared in an inline function, or if
4624 we have a weak definition, we must endeavor to create only one
4625 instance of the variable at link-time. */
4628 maybe_commonize_var (tree decl)
4630 /* Static data in a function with comdat linkage also has comdat
4632 if (TREE_STATIC (decl)
4633 /* Don't mess with __FUNCTION__. */
4634 && ! DECL_ARTIFICIAL (decl)
4635 && DECL_FUNCTION_SCOPE_P (decl)
4636 && vague_linkage_fn_p (DECL_CONTEXT (decl)))
4640 /* With weak symbols, we simply make the variable COMDAT;
4641 that will cause copies in multiple translations units to
4643 comdat_linkage (decl);
4647 if (DECL_INITIAL (decl) == NULL_TREE
4648 || DECL_INITIAL (decl) == error_mark_node)
4650 /* Without weak symbols, we can use COMMON to merge
4651 uninitialized variables. */
4652 TREE_PUBLIC (decl) = 1;
4653 DECL_COMMON (decl) = 1;
4657 /* While for initialized variables, we must use internal
4658 linkage -- which means that multiple copies will not
4660 TREE_PUBLIC (decl) = 0;
4661 DECL_COMMON (decl) = 0;
4662 warning_at (input_location, 0,
4663 "sorry: semantics of inline function static "
4664 "data %q+#D are wrong (you'll wind up "
4665 "with multiple copies)", decl);
4666 warning_at (DECL_SOURCE_LOCATION (decl), 0,
4667 " you can work around this by removing "
4672 else if (DECL_LANG_SPECIFIC (decl) && DECL_COMDAT (decl))
4673 /* Set it up again; we might have set DECL_INITIAL since the last
4675 comdat_linkage (decl);
4678 /* Issue an error message if DECL is an uninitialized const variable. */
4681 check_for_uninitialized_const_var (tree decl)
4683 tree type = TREE_TYPE (decl);
4685 if (TREE_CODE (decl) == VAR_DECL && DECL_DECLARED_CONSTEXPR_P (decl)
4686 && DECL_INITIAL (decl) == NULL)
4687 error ("missing initializer for constexpr %qD", decl);
4689 /* ``Unless explicitly declared extern, a const object does not have
4690 external linkage and must be initialized. ($8.4; $12.1)'' ARM
4692 else if (TREE_CODE (decl) == VAR_DECL
4693 && TREE_CODE (type) != REFERENCE_TYPE
4694 && CP_TYPE_CONST_P (type)
4695 && !TYPE_NEEDS_CONSTRUCTING (type)
4696 && !DECL_INITIAL (decl))
4697 error ("uninitialized const %qD", decl);
4701 /* Structure holding the current initializer being processed by reshape_init.
4702 CUR is a pointer to the current element being processed, END is a pointer
4703 after the last element present in the initializer. */
4704 typedef struct reshape_iterator_t
4706 constructor_elt *cur;
4707 constructor_elt *end;
4710 static tree reshape_init_r (tree, reshape_iter *, bool);
4712 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
4713 returned is the next FIELD_DECL (possibly FIELD itself) that can be
4714 initialized. If there are no more such fields, the return value
4718 next_initializable_field (tree field)
4721 && (TREE_CODE (field) != FIELD_DECL
4722 || (DECL_C_BIT_FIELD (field) && !DECL_NAME (field))
4723 || DECL_ARTIFICIAL (field)))
4724 field = TREE_CHAIN (field);
4729 /* Subroutine of reshape_init_array and reshape_init_vector, which does
4730 the actual work. ELT_TYPE is the element type of the array. MAX_INDEX is an
4731 INTEGER_CST representing the size of the array minus one (the maximum index),
4732 or NULL_TREE if the array was declared without specifying the size. D is
4733 the iterator within the constructor. */
4736 reshape_init_array_1 (tree elt_type, tree max_index, reshape_iter *d)
4739 bool sized_array_p = (max_index != NULL_TREE);
4740 unsigned HOST_WIDE_INT max_index_cst = 0;
4741 unsigned HOST_WIDE_INT index;
4743 /* The initializer for an array is always a CONSTRUCTOR. */
4744 new_init = build_constructor (init_list_type_node, NULL);
4748 /* Minus 1 is used for zero sized arrays. */
4749 if (integer_all_onesp (max_index))
4752 if (host_integerp (max_index, 1))
4753 max_index_cst = tree_low_cst (max_index, 1);
4754 /* sizetype is sign extended, not zero extended. */
4756 max_index_cst = tree_low_cst (fold_convert (size_type_node, max_index),
4760 /* Loop until there are no more initializers. */
4762 d->cur != d->end && (!sized_array_p || index <= max_index_cst);
4767 check_array_designated_initializer (d->cur);
4768 elt_init = reshape_init_r (elt_type, d, /*first_initializer_p=*/false);
4769 if (elt_init == error_mark_node)
4770 return error_mark_node;
4771 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init), NULL_TREE, elt_init);
4777 /* Subroutine of reshape_init_r, processes the initializers for arrays.
4778 Parameters are the same of reshape_init_r. */
4781 reshape_init_array (tree type, reshape_iter *d)
4783 tree max_index = NULL_TREE;
4785 gcc_assert (TREE_CODE (type) == ARRAY_TYPE);
4787 if (TYPE_DOMAIN (type))
4788 max_index = array_type_nelts (type);
4790 return reshape_init_array_1 (TREE_TYPE (type), max_index, d);
4793 /* Subroutine of reshape_init_r, processes the initializers for vectors.
4794 Parameters are the same of reshape_init_r. */
4797 reshape_init_vector (tree type, reshape_iter *d)
4799 tree max_index = NULL_TREE;
4802 gcc_assert (TREE_CODE (type) == VECTOR_TYPE);
4804 if (COMPOUND_LITERAL_P (d->cur->value))
4806 tree value = d->cur->value;
4807 if (!same_type_p (TREE_TYPE (value), type))
4809 error ("invalid type %qT as initializer for a vector of type %qT",
4810 TREE_TYPE (d->cur->value), type);
4811 value = error_mark_node;
4817 /* For a vector, the representation type is a struct
4818 containing a single member which is an array of the
4819 appropriate size. */
4820 rtype = TYPE_DEBUG_REPRESENTATION_TYPE (type);
4821 if (rtype && TYPE_DOMAIN (TREE_TYPE (TYPE_FIELDS (rtype))))
4822 max_index = array_type_nelts (TREE_TYPE (TYPE_FIELDS (rtype)));
4824 return reshape_init_array_1 (TREE_TYPE (type), max_index, d);
4827 /* Subroutine of reshape_init_r, processes the initializers for classes
4828 or union. Parameters are the same of reshape_init_r. */
4831 reshape_init_class (tree type, reshape_iter *d, bool first_initializer_p)
4836 gcc_assert (CLASS_TYPE_P (type));
4838 /* The initializer for a class is always a CONSTRUCTOR. */
4839 new_init = build_constructor (init_list_type_node, NULL);
4840 field = next_initializable_field (TYPE_FIELDS (type));
4846 An initializer for an aggregate member that is an
4847 empty class shall have the form of an empty
4848 initializer-list {}. */
4849 if (!first_initializer_p)
4851 error ("initializer for %qT must be brace-enclosed", type);
4852 return error_mark_node;
4857 /* Loop through the initializable fields, gathering initializers. */
4858 while (d->cur != d->end)
4862 /* Handle designated initializers, as an extension. */
4865 field = lookup_field_1 (type, d->cur->index, /*want_type=*/false);
4867 if (!field || TREE_CODE (field) != FIELD_DECL)
4869 error ("%qT has no non-static data member named %qD", type,
4871 return error_mark_node;
4875 /* If we processed all the member of the class, we are done. */
4879 field_init = reshape_init_r (TREE_TYPE (field), d,
4880 /*first_initializer_p=*/false);
4881 if (field_init == error_mark_node)
4882 return error_mark_node;
4884 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init), field, field_init);
4888 When a union is initialized with a brace-enclosed
4889 initializer, the braces shall only contain an
4890 initializer for the first member of the union. */
4891 if (TREE_CODE (type) == UNION_TYPE)
4894 field = next_initializable_field (TREE_CHAIN (field));
4900 /* Subroutine of reshape_init, which processes a single initializer (part of
4901 a CONSTRUCTOR). TYPE is the type of the variable being initialized, D is the
4902 iterator within the CONSTRUCTOR which points to the initializer to process.
4903 FIRST_INITIALIZER_P is true if this is the first initializer of the
4904 outermost CONSTRUCTOR node. */
4907 reshape_init_r (tree type, reshape_iter *d, bool first_initializer_p)
4909 tree init = d->cur->value;
4911 if (error_operand_p (init))
4912 return error_mark_node;
4914 /* A non-aggregate type is always initialized with a single
4916 if (!CP_AGGREGATE_TYPE_P (type))
4918 /* It is invalid to initialize a non-aggregate type with a
4919 brace-enclosed initializer before C++0x.
4920 We need to check for BRACE_ENCLOSED_INITIALIZER_P here because
4921 of g++.old-deja/g++.mike/p7626.C: a pointer-to-member constant is
4922 a CONSTRUCTOR (with a record type). */
4923 if (TREE_CODE (init) == CONSTRUCTOR
4924 && BRACE_ENCLOSED_INITIALIZER_P (init)) /* p7626.C */
4926 if (SCALAR_TYPE_P (type))
4928 error ("braces around scalar initializer for type %qT", type);
4929 init = error_mark_node;
4932 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS);
4941 All implicit type conversions (clause _conv_) are considered when
4942 initializing the aggregate member with an initializer from an
4943 initializer-list. If the initializer can initialize a member,
4944 the member is initialized. Otherwise, if the member is itself a
4945 non-empty subaggregate, brace elision is assumed and the
4946 initializer is considered for the initialization of the first
4947 member of the subaggregate. */
4948 if (TREE_CODE (init) != CONSTRUCTOR
4949 /* But don't try this for the first initializer, since that would be
4950 looking through the outermost braces; A a2 = { a1 }; is not a
4951 valid aggregate initialization. */
4952 && !first_initializer_p
4953 && (same_type_ignoring_top_level_qualifiers_p (type, TREE_TYPE (init))
4954 || can_convert_arg (type, TREE_TYPE (init), init, LOOKUP_NORMAL)))
4960 /* [dcl.init.string]
4962 A char array (whether plain char, signed char, or unsigned char)
4963 can be initialized by a string-literal (optionally enclosed in
4964 braces); a wchar_t array can be initialized by a wide
4965 string-literal (optionally enclosed in braces). */
4966 if (TREE_CODE (type) == ARRAY_TYPE
4967 && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type))))
4969 tree str_init = init;
4971 /* Strip one level of braces if and only if they enclose a single
4972 element (as allowed by [dcl.init.string]). */
4973 if (!first_initializer_p
4974 && TREE_CODE (str_init) == CONSTRUCTOR
4975 && VEC_length (constructor_elt, CONSTRUCTOR_ELTS (str_init)) == 1)
4977 str_init = VEC_index (constructor_elt,
4978 CONSTRUCTOR_ELTS (str_init), 0)->value;
4981 /* If it's a string literal, then it's the initializer for the array
4982 as a whole. Otherwise, continue with normal initialization for
4983 array types (one value per array element). */
4984 if (TREE_CODE (str_init) == STRING_CST)
4991 /* The following cases are about aggregates. If we are not within a full
4992 initializer already, and there is not a CONSTRUCTOR, it means that there
4993 is a missing set of braces (that is, we are processing the case for
4994 which reshape_init exists). */
4995 if (!first_initializer_p)
4997 if (TREE_CODE (init) == CONSTRUCTOR)
4999 if (TREE_TYPE (init) && TYPE_PTRMEMFUNC_P (TREE_TYPE (init)))
5000 /* There is no need to reshape pointer-to-member function
5001 initializers, as they are always constructed correctly
5002 by the front end. */
5004 else if (COMPOUND_LITERAL_P (init))
5005 /* For a nested compound literal, there is no need to reshape since
5006 brace elision is not allowed. Even if we decided to allow it,
5007 we should add a call to reshape_init in finish_compound_literal,
5008 before calling digest_init, so changing this code would still
5009 not be necessary. */
5010 gcc_assert (!BRACE_ENCLOSED_INITIALIZER_P (init));
5014 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init));
5015 return reshape_init (type, init);
5019 warning (OPT_Wmissing_braces, "missing braces around initializer for %qT",
5023 /* Dispatch to specialized routines. */
5024 if (CLASS_TYPE_P (type))
5025 return reshape_init_class (type, d, first_initializer_p);
5026 else if (TREE_CODE (type) == ARRAY_TYPE)
5027 return reshape_init_array (type, d);
5028 else if (TREE_CODE (type) == VECTOR_TYPE)
5029 return reshape_init_vector (type, d);
5034 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
5035 brace-enclosed aggregate initializer.
5037 INIT is the CONSTRUCTOR containing the list of initializers describing
5038 a brace-enclosed initializer for an entity of the indicated aggregate TYPE.
5039 It may not presently match the shape of the TYPE; for example:
5041 struct S { int a; int b; };
5042 struct S a[] = { 1, 2, 3, 4 };
5044 Here INIT will hold a VEC of four elements, rather than a
5045 VEC of two elements, each itself a VEC of two elements. This
5046 routine transforms INIT from the former form into the latter. The
5047 revised CONSTRUCTOR node is returned. */
5050 reshape_init (tree type, tree init)
5052 VEC(constructor_elt, gc) *v;
5056 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init));
5058 v = CONSTRUCTOR_ELTS (init);
5060 /* An empty constructor does not need reshaping, and it is always a valid
5062 if (VEC_empty (constructor_elt, v))
5065 /* Recurse on this CONSTRUCTOR. */
5066 d.cur = VEC_index (constructor_elt, v, 0);
5067 d.end = d.cur + VEC_length (constructor_elt, v);
5069 new_init = reshape_init_r (type, &d, true);
5070 if (new_init == error_mark_node)
5071 return error_mark_node;
5073 /* Make sure all the element of the constructor were used. Otherwise,
5074 issue an error about exceeding initializers. */
5076 error ("too many initializers for %qT", type);
5081 /* Verify array initializer. Returns true if errors have been reported. */
5084 check_array_initializer (tree decl, tree type, tree init)
5086 tree element_type = TREE_TYPE (type);
5088 /* The array type itself need not be complete, because the
5089 initializer may tell us how many elements are in the array.
5090 But, the elements of the array must be complete. */
5091 if (!COMPLETE_TYPE_P (complete_type (element_type)))
5094 error ("elements of array %q#D have incomplete type", decl);
5096 error ("elements of array %q#T have incomplete type", type);
5099 /* It is not valid to initialize a VLA. */
5101 && ((COMPLETE_TYPE_P (type) && !TREE_CONSTANT (TYPE_SIZE (type)))
5102 || !TREE_CONSTANT (TYPE_SIZE (element_type))))
5105 error ("variable-sized object %qD may not be initialized", decl);
5107 error ("variable-sized compound literal");
5113 /* Subroutine of check_initializer; args are passed down from that function.
5114 Set stmts_are_full_exprs_p to 1 across a call to build_aggr_init. */
5117 build_aggr_init_full_exprs (tree decl, tree init, int flags)
5120 int saved_stmts_are_full_exprs_p = 0;
5121 if (building_stmt_tree ())
5123 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
5124 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
5126 init = build_aggr_init (decl, init, flags, tf_warning_or_error);
5127 if (building_stmt_tree ())
5128 current_stmt_tree ()->stmts_are_full_exprs_p =
5129 saved_stmts_are_full_exprs_p;
5133 /* Verify INIT (the initializer for DECL), and record the
5134 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
5135 grok_reference_init.
5137 If the return value is non-NULL, it is an expression that must be
5138 evaluated dynamically to initialize DECL. */
5141 check_initializer (tree decl, tree init, int flags, tree *cleanup)
5143 tree type = TREE_TYPE (decl);
5144 tree init_code = NULL;
5146 /* Things that are going to be initialized need to have complete
5148 TREE_TYPE (decl) = type = complete_type (TREE_TYPE (decl));
5150 if (type == error_mark_node)
5151 /* We will have already complained. */
5154 if (TREE_CODE (type) == ARRAY_TYPE)
5156 if (check_array_initializer (decl, type, init))
5159 else if (!COMPLETE_TYPE_P (type))
5161 error ("%qD has incomplete type", decl);
5162 TREE_TYPE (decl) = error_mark_node;
5166 /* There is no way to make a variable-sized class type in GNU C++. */
5167 gcc_assert (TREE_CONSTANT (TYPE_SIZE (type)));
5169 if (init && BRACE_ENCLOSED_INITIALIZER_P (init))
5171 int init_len = VEC_length (constructor_elt, CONSTRUCTOR_ELTS (init));
5172 if (SCALAR_TYPE_P (type))
5176 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS);
5177 init = build_zero_init (type, NULL_TREE, false);
5179 else if (init_len != 1)
5181 error ("scalar object %qD requires one element in initializer",
5183 TREE_TYPE (decl) = error_mark_node;
5189 if (TREE_CODE (decl) == CONST_DECL)
5191 gcc_assert (TREE_CODE (type) != REFERENCE_TYPE);
5193 DECL_INITIAL (decl) = init;
5195 gcc_assert (init != NULL_TREE);
5198 else if (!DECL_EXTERNAL (decl) && TREE_CODE (type) == REFERENCE_TYPE)
5199 init = grok_reference_init (decl, type, init, cleanup);
5202 /* Do not reshape constructors of vectors (they don't need to be
5204 if (BRACE_ENCLOSED_INITIALIZER_P (init))
5206 if (is_std_init_list (type))
5207 return build_init_list_var_init (decl, type, init, cleanup);
5208 else if (TYPE_NON_AGGREGATE_CLASS (type))
5210 /* Don't reshape if the class has constructors. */
5211 if (cxx_dialect == cxx98)
5212 error ("in C++98 %qD must be initialized by constructor, "
5215 init = build_tree_list (NULL_TREE, init);
5217 else if (TREE_CODE (type) == VECTOR_TYPE && TYPE_VECTOR_OPAQUE (type))
5219 error ("opaque vector types cannot be initialized");
5220 init = error_mark_node;
5223 init = reshape_init (type, init);
5226 /* If DECL has an array type without a specific bound, deduce the
5227 array size from the initializer. */
5228 maybe_deduce_size_from_array_init (decl, init);
5229 type = TREE_TYPE (decl);
5230 if (type == error_mark_node)
5233 if (TYPE_NEEDS_CONSTRUCTING (type)
5234 || (CLASS_TYPE_P (type)
5235 && !BRACE_ENCLOSED_INITIALIZER_P (init)))
5236 return build_aggr_init_full_exprs (decl, init, flags);
5237 else if (TREE_CODE (init) != TREE_VEC)
5239 init_code = store_init_value (decl, init, flags);
5240 if (pedantic && TREE_CODE (type) == ARRAY_TYPE
5241 && DECL_INITIAL (decl)
5242 && TREE_CODE (DECL_INITIAL (decl)) == STRING_CST
5243 && PAREN_STRING_LITERAL_P (DECL_INITIAL (decl)))
5244 warning (0, "array %qD initialized by parenthesized string literal %qE",
5245 decl, DECL_INITIAL (decl));
5249 else if (DECL_EXTERNAL (decl))
5251 else if (TYPE_P (type) && TYPE_NEEDS_CONSTRUCTING (type))
5252 return build_aggr_init_full_exprs (decl, init, flags);
5253 else if (MAYBE_CLASS_TYPE_P (type))
5255 tree core_type = strip_array_types (type);
5257 if (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type))
5258 error ("structure %qD with uninitialized const members", decl);
5259 if (CLASSTYPE_REF_FIELDS_NEED_INIT (core_type))
5260 error ("structure %qD with uninitialized reference members", decl);
5262 check_for_uninitialized_const_var (decl);
5265 check_for_uninitialized_const_var (decl);
5267 if (init && init != error_mark_node)
5268 init_code = build2 (INIT_EXPR, type, decl, init);
5273 /* If DECL is not a local variable, give it RTL. */
5276 make_rtl_for_nonlocal_decl (tree decl, tree init, const char* asmspec)
5278 int toplev = toplevel_bindings_p ();
5280 const char *filename;
5282 /* Set the DECL_ASSEMBLER_NAME for the object. */
5285 /* The `register' keyword, when used together with an
5286 asm-specification, indicates that the variable should be
5287 placed in a particular register. */
5288 if (TREE_CODE (decl) == VAR_DECL && DECL_REGISTER (decl))
5290 set_user_assembler_name (decl, asmspec);
5291 DECL_HARD_REGISTER (decl) = 1;
5295 if (TREE_CODE (decl) == FUNCTION_DECL
5296 && DECL_BUILT_IN_CLASS (decl) == BUILT_IN_NORMAL)
5297 set_builtin_user_assembler_name (decl, asmspec);
5298 set_user_assembler_name (decl, asmspec);
5302 /* Handle non-variables up front. */
5303 if (TREE_CODE (decl) != VAR_DECL)
5305 rest_of_decl_compilation (decl, toplev, at_eof);
5309 /* If we see a class member here, it should be a static data
5311 if (DECL_LANG_SPECIFIC (decl) && DECL_IN_AGGR_P (decl))
5313 gcc_assert (TREE_STATIC (decl));
5314 /* An in-class declaration of a static data member should be
5315 external; it is only a declaration, and not a definition. */
5316 if (init == NULL_TREE)
5317 gcc_assert (DECL_EXTERNAL (decl) || !TREE_PUBLIC (decl));
5320 /* We don't create any RTL for local variables. */
5321 if (DECL_FUNCTION_SCOPE_P (decl) && !TREE_STATIC (decl))
5324 /* We defer emission of local statics until the corresponding
5325 DECL_EXPR is expanded. */
5326 defer_p = DECL_FUNCTION_SCOPE_P (decl) || DECL_VIRTUAL_P (decl);
5328 /* We try to defer namespace-scope static constants so that they are
5329 not emitted into the object file unnecessarily. */
5330 filename = input_filename;
5331 if (!DECL_VIRTUAL_P (decl)
5332 && TREE_READONLY (decl)
5333 && DECL_INITIAL (decl) != NULL_TREE
5334 && DECL_INITIAL (decl) != error_mark_node
5336 && ! EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl))
5338 && !TREE_PUBLIC (decl))
5340 /* Fool with the linkage of static consts according to #pragma
5342 struct c_fileinfo *finfo = get_fileinfo (filename);
5343 if (!finfo->interface_unknown && !TREE_PUBLIC (decl))
5345 TREE_PUBLIC (decl) = 1;
5346 DECL_EXTERNAL (decl) = finfo->interface_only;
5351 /* Likewise for template instantiations. */
5352 else if (DECL_LANG_SPECIFIC (decl)
5353 && DECL_IMPLICIT_INSTANTIATION (decl))
5356 /* If we're not deferring, go ahead and assemble the variable. */
5358 rest_of_decl_compilation (decl, toplev, at_eof);
5361 /* walk_tree helper for wrap_temporary_cleanups, below. */
5364 wrap_cleanups_r (tree *stmt_p, int *walk_subtrees, void *data)
5366 if (TYPE_P (*stmt_p))
5372 if (TREE_CODE (*stmt_p) == TARGET_EXPR)
5374 tree guard = (tree)data;
5375 tree tcleanup = TARGET_EXPR_CLEANUP (*stmt_p);
5377 tcleanup = build2 (TRY_CATCH_EXPR, void_type_node, tcleanup, guard);
5378 /* Tell honor_protect_cleanup_actions to handle this as a separate
5380 TRY_CATCH_IS_CLEANUP (tcleanup) = 1;
5382 TARGET_EXPR_CLEANUP (*stmt_p) = tcleanup;
5388 /* We're initializing a local variable which has a cleanup GUARD. If there
5389 are any temporaries used in the initializer INIT of this variable, we
5390 need to wrap their cleanups with TRY_CATCH_EXPR (, GUARD) so that the
5391 variable will be cleaned up properly if one of them throws.
5393 Unfortunately, there's no way to express this properly in terms of
5394 nesting, as the regions for the temporaries overlap the region for the
5395 variable itself; if there are two temporaries, the variable needs to be
5396 the first thing destroyed if either of them throws. However, we only
5397 want to run the variable's cleanup if it actually got constructed. So
5398 we need to guard the temporary cleanups with the variable's cleanup if
5399 they are run on the normal path, but not if they are run on the
5400 exceptional path. We implement this by telling
5401 honor_protect_cleanup_actions to strip the variable cleanup from the
5402 exceptional path. */
5405 wrap_temporary_cleanups (tree init, tree guard)
5407 cp_walk_tree_without_duplicates (&init, wrap_cleanups_r, (void *)guard);
5410 /* Generate code to initialize DECL (a local variable). */
5413 initialize_local_var (tree decl, tree init)
5415 tree type = TREE_TYPE (decl);
5419 gcc_assert (TREE_CODE (decl) == VAR_DECL
5420 || TREE_CODE (decl) == RESULT_DECL);
5421 gcc_assert (!TREE_STATIC (decl));
5423 if (DECL_SIZE (decl) == NULL_TREE)
5425 /* If we used it already as memory, it must stay in memory. */
5426 DECL_INITIAL (decl) = NULL_TREE;
5427 TREE_ADDRESSABLE (decl) = TREE_USED (decl);
5431 if (type == error_mark_node)
5434 /* Compute and store the initial value. */
5435 already_used = TREE_USED (decl) || TREE_USED (type);
5437 /* Generate a cleanup, if necessary. */
5438 cleanup = cxx_maybe_build_cleanup (decl);
5440 /* Perform the initialization. */
5443 int saved_stmts_are_full_exprs_p;
5445 /* If we're only initializing a single object, guard the destructors
5446 of any temporaries used in its initializer with its destructor.
5447 This isn't right for arrays because each element initialization is
5448 a full-expression. */
5449 if (cleanup && TREE_CODE (type) != ARRAY_TYPE)
5450 wrap_temporary_cleanups (init, cleanup);
5452 gcc_assert (building_stmt_tree ());
5453 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
5454 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
5455 finish_expr_stmt (init);
5456 current_stmt_tree ()->stmts_are_full_exprs_p =
5457 saved_stmts_are_full_exprs_p;
5460 /* Set this to 0 so we can tell whether an aggregate which was
5461 initialized was ever used. Don't do this if it has a
5462 destructor, so we don't complain about the 'resource
5463 allocation is initialization' idiom. Now set
5464 attribute((unused)) on types so decls of that type will be
5465 marked used. (see TREE_USED, above.) */
5466 if (TYPE_NEEDS_CONSTRUCTING (type)
5468 && TYPE_HAS_TRIVIAL_DESTRUCTOR (type)
5469 && DECL_NAME (decl))
5470 TREE_USED (decl) = 0;
5471 else if (already_used)
5472 TREE_USED (decl) = 1;
5475 finish_decl_cleanup (decl, cleanup);
5478 /* DECL is a VAR_DECL for a compiler-generated variable with static
5479 storage duration (like a virtual table) whose initializer is a
5480 compile-time constant. INIT must be either a TREE_LIST of values,
5481 or a CONSTRUCTOR. Initialize the variable and provide it to the
5485 initialize_artificial_var (tree decl, tree init)
5487 gcc_assert (DECL_ARTIFICIAL (decl));
5488 if (TREE_CODE (init) == TREE_LIST)
5489 init = build_constructor_from_list (TREE_TYPE (decl), init);
5490 gcc_assert (TREE_CODE (init) == CONSTRUCTOR);
5491 DECL_INITIAL (decl) = init;
5492 DECL_INITIALIZED_P (decl) = 1;
5493 determine_visibility (decl);
5494 layout_var_decl (decl);
5495 maybe_commonize_var (decl);
5496 make_rtl_for_nonlocal_decl (decl, init, /*asmspec=*/NULL);
5499 /* INIT is the initializer for a variable, as represented by the
5500 parser. Returns true iff INIT is value-dependent. */
5503 value_dependent_init_p (tree init)
5505 if (TREE_CODE (init) == TREE_LIST)
5506 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
5507 return any_value_dependent_elements_p (init);
5508 else if (TREE_CODE (init) == CONSTRUCTOR)
5509 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
5511 VEC(constructor_elt, gc) *elts;
5515 elts = CONSTRUCTOR_ELTS (init);
5516 nelts = VEC_length (constructor_elt, elts);
5517 for (i = 0; i < nelts; ++i)
5518 if (value_dependent_init_p (VEC_index (constructor_elt,
5523 /* It must be a simple expression, e.g., int i = 3; */
5524 return value_dependent_expression_p (init);
5529 /* Finish processing of a declaration;
5530 install its line number and initial value.
5531 If the length of an array type is not known before,
5532 it must be determined now, from the initial value, or it is an error.
5534 INIT is the initializer (if any) for DECL. If INIT_CONST_EXPR_P is
5535 true, then INIT is an integral constant expression.
5537 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
5538 if the (init) syntax was used. */
5541 cp_finish_decl (tree decl, tree init, bool init_const_expr_p,
5542 tree asmspec_tree, int flags)
5546 const char *asmspec = NULL;
5547 int was_readonly = 0;
5548 bool var_definition_p = false;
5549 int saved_processing_template_decl;
5552 if (decl == error_mark_node)
5557 error ("assignment (not initialization) in declaration");
5561 gcc_assert (TREE_CODE (decl) != RESULT_DECL);
5562 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
5563 gcc_assert (TREE_CODE (decl) != PARM_DECL);
5565 type = TREE_TYPE (decl);
5566 if (type == error_mark_node)
5569 /* Assume no cleanup is required. */
5570 cleanup = NULL_TREE;
5571 saved_processing_template_decl = processing_template_decl;
5573 /* If a name was specified, get the string. */
5574 if (global_scope_p (current_binding_level))
5575 asmspec_tree = maybe_apply_renaming_pragma (decl, asmspec_tree);
5576 if (asmspec_tree && asmspec_tree != error_mark_node)
5577 asmspec = TREE_STRING_POINTER (asmspec_tree);
5579 if (current_class_type
5580 && CP_DECL_CONTEXT (decl) == current_class_type
5581 && TYPE_BEING_DEFINED (current_class_type)
5582 && (DECL_INITIAL (decl) || init))
5583 DECL_INITIALIZED_IN_CLASS_P (decl) = 1;
5585 auto_node = type_uses_auto (type);
5588 if (init == NULL_TREE)
5590 error ("declaration of %q#D has no initializer", decl);
5591 TREE_TYPE (decl) = error_mark_node;
5594 if (TREE_CODE (init) == TREE_LIST)
5595 init = build_x_compound_expr_from_list (init, "initializer");
5596 if (describable_type (init))
5598 type = TREE_TYPE (decl) = do_auto_deduction (type, init, auto_node);
5599 if (type == error_mark_node)
5604 if (init && TREE_CODE (decl) == FUNCTION_DECL)
5607 if (init == ridpointers[(int)RID_DELETE])
5609 /* FIXME check this is 1st decl. */
5610 DECL_DELETED_FN (decl) = 1;
5611 DECL_DECLARED_INLINE_P (decl) = 1;
5612 DECL_INITIAL (decl) = error_mark_node;
5613 FOR_EACH_CLONE (clone, decl)
5615 DECL_DELETED_FN (clone) = 1;
5616 DECL_DECLARED_INLINE_P (clone) = 1;
5617 DECL_INITIAL (clone) = error_mark_node;
5621 else if (init == ridpointers[(int)RID_DEFAULT])
5623 if (defaultable_fn_check (decl))
5624 DECL_DEFAULTED_FN (decl) = 1;
5626 DECL_INITIAL (decl) = NULL_TREE;
5630 if (processing_template_decl)
5632 bool type_dependent_p;
5634 /* Add this declaration to the statement-tree. */
5635 if (at_function_scope_p ())
5636 add_decl_expr (decl);
5638 type_dependent_p = dependent_type_p (type);
5640 if (check_for_bare_parameter_packs (init))
5643 DECL_INITIAL (decl) = NULL_TREE;
5646 if (init && init_const_expr_p && TREE_CODE (decl) == VAR_DECL)
5648 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl) = 1;
5649 if (DECL_INTEGRAL_CONSTANT_VAR_P (decl))
5650 TREE_CONSTANT (decl) = 1;
5653 /* Generally, initializers in templates are expanded when the
5654 template is instantiated. But, if DECL is an integral
5655 constant static data member, then it can be used in future
5656 integral constant expressions, and its value must be
5659 && DECL_CLASS_SCOPE_P (decl)
5660 && DECL_INTEGRAL_CONSTANT_VAR_P (decl)
5661 && !type_dependent_p
5662 && !value_dependent_init_p (init)))
5665 DECL_INITIAL (decl) = init;
5666 if (TREE_CODE (decl) == VAR_DECL
5667 && !DECL_PRETTY_FUNCTION_P (decl)
5668 && !type_dependent_p)
5669 maybe_deduce_size_from_array_init (decl, init);
5673 if (TREE_CODE (init) == TREE_LIST)
5675 /* If the parenthesized-initializer form was used (e.g.,
5676 "int A<N>::i(X)"), then INIT will be a TREE_LIST of initializer
5677 arguments. (There is generally only one.) We convert them
5680 for (; list; list = TREE_CHAIN (list))
5682 tree elt = TREE_VALUE (list);
5683 TREE_VALUE (list) = fold_non_dependent_expr (elt);
5687 init = fold_non_dependent_expr (init);
5688 processing_template_decl = 0;
5691 /* Take care of TYPE_DECLs up front. */
5692 if (TREE_CODE (decl) == TYPE_DECL)
5694 if (type != error_mark_node
5695 && MAYBE_CLASS_TYPE_P (type) && DECL_NAME (decl))
5697 if (TREE_TYPE (DECL_NAME (decl)) && TREE_TYPE (decl) != type)
5698 warning (0, "shadowing previous type declaration of %q#D", decl);
5699 set_identifier_type_value (DECL_NAME (decl), decl);
5702 /* If we have installed this as the canonical typedef for this
5703 type, and that type has not been defined yet, delay emitting
5704 the debug information for it, as we will emit it later. */
5705 if (TYPE_MAIN_DECL (TREE_TYPE (decl)) == decl
5706 && !COMPLETE_TYPE_P (TREE_TYPE (decl)))
5707 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
5709 rest_of_decl_compilation (decl, DECL_CONTEXT (decl) == NULL_TREE,
5714 /* A reference will be modified here, as it is initialized. */
5715 if (! DECL_EXTERNAL (decl)
5716 && TREE_READONLY (decl)
5717 && TREE_CODE (type) == REFERENCE_TYPE)
5720 TREE_READONLY (decl) = 0;
5723 if (TREE_CODE (decl) == VAR_DECL)
5725 /* Only variables with trivial initialization and destruction can
5726 have thread-local storage. */
5727 if (DECL_THREAD_LOCAL_P (decl)
5728 && (type_has_nontrivial_default_init (TREE_TYPE (decl))
5729 || TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl))))
5730 error ("%qD cannot be thread-local because it has non-trivial "
5731 "type %qT", decl, TREE_TYPE (decl));
5732 /* If this is a local variable that will need a mangled name,
5733 register it now. We must do this before processing the
5734 initializer for the variable, since the initialization might
5735 require a guard variable, and since the mangled name of the
5736 guard variable will depend on the mangled name of this
5738 if (DECL_FUNCTION_SCOPE_P (decl)
5739 && TREE_STATIC (decl)
5740 && !DECL_ARTIFICIAL (decl))
5741 push_local_name (decl);
5742 /* Convert the initializer to the type of DECL, if we have not
5743 already initialized DECL. */
5744 if (!DECL_INITIALIZED_P (decl)
5745 /* If !DECL_EXTERNAL then DECL is being defined. In the
5746 case of a static data member initialized inside the
5747 class-specifier, there can be an initializer even if DECL
5748 is *not* defined. */
5749 && (!DECL_EXTERNAL (decl) || init))
5751 if (TYPE_FOR_JAVA (type) && MAYBE_CLASS_TYPE_P (type))
5754 = IDENTIFIER_GLOBAL_VALUE (get_identifier ("jclass"));
5755 /* Allow libjava/prims.cc define primitive classes. */
5756 if (init != NULL_TREE
5757 || jclass == NULL_TREE
5758 || TREE_CODE (jclass) != TYPE_DECL
5759 || !POINTER_TYPE_P (TREE_TYPE (jclass))
5760 || !same_type_ignoring_top_level_qualifiers_p
5761 (type, TREE_TYPE (TREE_TYPE (jclass))))
5762 error ("Java object %qD not allocated with %<new%>", decl);
5767 DECL_NONTRIVIALLY_INITIALIZED_P (decl) = 1;
5768 if (init_const_expr_p)
5770 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl) = 1;
5771 if (DECL_INTEGRAL_CONSTANT_VAR_P (decl))
5772 TREE_CONSTANT (decl) = 1;
5775 init = check_initializer (decl, init, flags, &cleanup);
5776 /* Thread-local storage cannot be dynamically initialized. */
5777 if (DECL_THREAD_LOCAL_P (decl) && init)
5779 error ("%qD is thread-local and so cannot be dynamically "
5780 "initialized", decl);
5784 /* Check that the initializer for a static data member was a
5785 constant. Although we check in the parser that the
5786 initializer is an integral constant expression, we do not
5787 simplify division-by-zero at the point at which it
5788 occurs. Therefore, in:
5790 struct S { static const int i = 7 / 0; };
5792 we issue an error at this point. It would
5793 probably be better to forbid division by zero in
5794 integral constant expressions. */
5795 if (DECL_EXTERNAL (decl) && init)
5797 error ("%qD cannot be initialized by a non-constant expression"
5798 " when being declared", decl);
5799 DECL_INITIALIZED_IN_CLASS_P (decl) = 0;
5807 The memory occupied by any object of static storage
5808 duration is zero-initialized at program startup before
5809 any other initialization takes place.
5811 We cannot create an appropriate initializer until after
5812 the type of DECL is finalized. If DECL_INITIAL is set,
5813 then the DECL is statically initialized, and any
5814 necessary zero-initialization has already been performed. */
5815 if (TREE_STATIC (decl) && !DECL_INITIAL (decl))
5816 DECL_INITIAL (decl) = build_zero_init (TREE_TYPE (decl),
5817 /*nelts=*/NULL_TREE,
5818 /*static_storage_p=*/true);
5819 /* Remember that the initialization for this variable has
5821 DECL_INITIALIZED_P (decl) = 1;
5822 /* This declaration is the definition of this variable,
5823 unless we are initializing a static data member within
5824 the class specifier. */
5825 if (!DECL_EXTERNAL (decl))
5826 var_definition_p = true;
5828 /* If the variable has an array type, lay out the type, even if
5829 there is no initializer. It is valid to index through the
5830 array, and we must get TYPE_ALIGN set correctly on the array
5832 else if (TREE_CODE (type) == ARRAY_TYPE)
5835 if (!processing_template_decl
5836 && TREE_STATIC (decl)
5837 && !at_function_scope_p ()
5838 && current_function_decl == NULL)
5839 /* So decl is a global variable or a static member of a
5840 non local class. Record the types it uses
5841 so that we can decide later to emit debug info for them. */
5842 record_types_used_by_current_var_decl (decl);
5844 else if (TREE_CODE (decl) == FIELD_DECL
5845 && TYPE_FOR_JAVA (type) && MAYBE_CLASS_TYPE_P (type))
5846 error ("non-static data member %qD has Java class type", decl);
5848 /* Add this declaration to the statement-tree. This needs to happen
5849 after the call to check_initializer so that the DECL_EXPR for a
5850 reference temp is added before the DECL_EXPR for the reference itself. */
5851 if (at_function_scope_p ())
5852 add_decl_expr (decl);
5854 /* Let the middle end know about variables and functions -- but not
5855 static data members in uninstantiated class templates. */
5856 if (!saved_processing_template_decl
5857 && (TREE_CODE (decl) == VAR_DECL
5858 || TREE_CODE (decl) == FUNCTION_DECL))
5860 if (TREE_CODE (decl) == VAR_DECL)
5862 layout_var_decl (decl);
5863 maybe_commonize_var (decl);
5866 /* This needs to happen after the linkage is set. */
5867 determine_visibility (decl);
5869 if (var_definition_p && TREE_STATIC (decl))
5871 /* If a TREE_READONLY variable needs initialization
5872 at runtime, it is no longer readonly and we need to
5873 avoid MEM_READONLY_P being set on RTL created for it. */
5876 if (TREE_READONLY (decl))
5877 TREE_READONLY (decl) = 0;
5880 else if (was_readonly)
5881 TREE_READONLY (decl) = 1;
5884 make_rtl_for_nonlocal_decl (decl, init, asmspec);
5886 /* Check for abstractness of the type. Notice that there is no
5887 need to strip array types here since the check for those types
5888 is already done within create_array_type_for_decl. */
5889 if (TREE_CODE (type) == FUNCTION_TYPE
5890 || TREE_CODE (type) == METHOD_TYPE)
5891 abstract_virtuals_error (decl, TREE_TYPE (type));
5893 abstract_virtuals_error (decl, type);
5895 if (TREE_TYPE (decl) == error_mark_node)
5896 /* No initialization required. */
5898 else if (TREE_CODE (decl) == FUNCTION_DECL)
5902 if (init == ridpointers[(int)RID_DEFAULT])
5904 /* An out-of-class default definition is defined at
5905 the point where it is explicitly defaulted. */
5906 if (DECL_INITIAL (decl) == error_mark_node)
5907 synthesize_method (decl);
5910 error ("function %q#D is initialized like a variable", decl);
5912 /* else no initialization required. */
5914 else if (DECL_EXTERNAL (decl)
5915 && ! (DECL_LANG_SPECIFIC (decl)
5916 && DECL_NOT_REALLY_EXTERN (decl)))
5919 DECL_INITIAL (decl) = init;
5921 /* A variable definition. */
5922 else if (DECL_FUNCTION_SCOPE_P (decl) && !TREE_STATIC (decl))
5923 /* Initialize the local variable. */
5924 initialize_local_var (decl, init);
5926 /* If a variable is defined, and then a subsequent
5927 definition with external linkage is encountered, we will
5928 get here twice for the same variable. We want to avoid
5929 calling expand_static_init more than once. For variables
5930 that are not static data members, we can call
5931 expand_static_init only when we actually process the
5932 initializer. It is not legal to redeclare a static data
5933 member, so this issue does not arise in that case. */
5934 else if (var_definition_p && TREE_STATIC (decl))
5935 expand_static_init (decl, init);
5938 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
5939 reference, insert it in the statement-tree now. */
5941 push_cleanup (decl, cleanup, false);
5944 processing_template_decl = saved_processing_template_decl;
5947 TREE_READONLY (decl) = 1;
5949 /* If this was marked 'used', be sure it will be output. */
5950 if (lookup_attribute ("used", DECL_ATTRIBUTES (decl)))
5951 mark_decl_referenced (decl);
5954 /* Returns a declaration for a VAR_DECL as if:
5956 extern "C" TYPE NAME;
5958 had been seen. Used to create compiler-generated global
5962 declare_global_var (tree name, tree type)
5966 push_to_top_level ();
5967 decl = build_decl (input_location, VAR_DECL, name, type);
5968 TREE_PUBLIC (decl) = 1;
5969 DECL_EXTERNAL (decl) = 1;
5970 DECL_ARTIFICIAL (decl) = 1;
5971 /* If the user has explicitly declared this variable (perhaps
5972 because the code we are compiling is part of a low-level runtime
5973 library), then it is possible that our declaration will be merged
5974 with theirs by pushdecl. */
5975 decl = pushdecl (decl);
5976 cp_finish_decl (decl, NULL_TREE, false, NULL_TREE, 0);
5977 pop_from_top_level ();
5982 /* Returns the type for the argument to "__cxa_atexit" (or "atexit",
5983 if "__cxa_atexit" is not being used) corresponding to the function
5984 to be called when the program exits. */
5987 get_atexit_fn_ptr_type (void)
5992 if (!atexit_fn_ptr_type_node)
5994 if (flag_use_cxa_atexit
5995 && !targetm.cxx.use_atexit_for_cxa_atexit ())
5996 /* The parameter to "__cxa_atexit" is "void (*)(void *)". */
5997 arg_types = tree_cons (NULL_TREE, ptr_type_node, void_list_node);
5999 /* The parameter to "atexit" is "void (*)(void)". */
6000 arg_types = void_list_node;
6002 fn_type = build_function_type (void_type_node, arg_types);
6003 atexit_fn_ptr_type_node = build_pointer_type (fn_type);
6006 return atexit_fn_ptr_type_node;
6009 /* Returns a pointer to the `atexit' function. Note that if
6010 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
6011 `__cxa_atexit' function specified in the IA64 C++ ABI. */
6014 get_atexit_node (void)
6021 bool use_aeabi_atexit;
6026 if (flag_use_cxa_atexit && !targetm.cxx.use_atexit_for_cxa_atexit ())
6028 /* The declaration for `__cxa_atexit' is:
6030 int __cxa_atexit (void (*)(void *), void *, void *)
6032 We build up the argument types and then then function type
6035 use_aeabi_atexit = targetm.cxx.use_aeabi_atexit ();
6036 /* First, build the pointer-to-function type for the first
6038 fn_ptr_type = get_atexit_fn_ptr_type ();
6039 /* Then, build the rest of the argument types. */
6040 arg_types = tree_cons (NULL_TREE, ptr_type_node, void_list_node);
6041 if (use_aeabi_atexit)
6043 arg_types = tree_cons (NULL_TREE, fn_ptr_type, arg_types);
6044 arg_types = tree_cons (NULL_TREE, ptr_type_node, arg_types);
6048 arg_types = tree_cons (NULL_TREE, ptr_type_node, arg_types);
6049 arg_types = tree_cons (NULL_TREE, fn_ptr_type, arg_types);
6051 /* And the final __cxa_atexit type. */
6052 fn_type = build_function_type (integer_type_node, arg_types);
6053 fn_ptr_type = build_pointer_type (fn_type);
6054 if (use_aeabi_atexit)
6055 name = "__aeabi_atexit";
6057 name = "__cxa_atexit";
6061 /* The declaration for `atexit' is:
6063 int atexit (void (*)());
6065 We build up the argument types and then then function type
6067 fn_ptr_type = get_atexit_fn_ptr_type ();
6068 arg_types = tree_cons (NULL_TREE, fn_ptr_type, void_list_node);
6069 /* Build the final atexit type. */
6070 fn_type = build_function_type (integer_type_node, arg_types);
6074 /* Now, build the function declaration. */
6075 push_lang_context (lang_name_c);
6076 atexit_fndecl = build_library_fn_ptr (name, fn_type);
6077 mark_used (atexit_fndecl);
6078 pop_lang_context ();
6079 atexit_node = decay_conversion (atexit_fndecl);
6084 /* Returns the __dso_handle VAR_DECL. */
6087 get_dso_handle_node (void)
6089 if (dso_handle_node)
6090 return dso_handle_node;
6092 /* Declare the variable. */
6093 dso_handle_node = declare_global_var (get_identifier ("__dso_handle"),
6096 return dso_handle_node;
6099 /* Begin a new function with internal linkage whose job will be simply
6100 to destroy some particular variable. */
6102 static GTY(()) int start_cleanup_cnt;
6105 start_cleanup_fn (void)
6110 bool use_cxa_atexit = flag_use_cxa_atexit
6111 && !targetm.cxx.use_atexit_for_cxa_atexit ();
6113 push_to_top_level ();
6115 /* No need to mangle this. */
6116 push_lang_context (lang_name_c);
6118 /* Build the name of the function. */
6119 sprintf (name, "__tcf_%d", start_cleanup_cnt++);
6120 /* Build the function declaration. */
6121 fntype = TREE_TYPE (get_atexit_fn_ptr_type ());
6122 fndecl = build_lang_decl (FUNCTION_DECL, get_identifier (name), fntype);
6123 /* It's a function with internal linkage, generated by the
6125 TREE_PUBLIC (fndecl) = 0;
6126 DECL_ARTIFICIAL (fndecl) = 1;
6127 /* Make the function `inline' so that it is only emitted if it is
6128 actually needed. It is unlikely that it will be inlined, since
6129 it is only called via a function pointer, but we avoid unnecessary
6130 emissions this way. */
6131 DECL_DECLARED_INLINE_P (fndecl) = 1;
6132 DECL_INTERFACE_KNOWN (fndecl) = 1;
6133 /* Build the parameter. */
6138 parmdecl = cp_build_parm_decl (NULL_TREE, ptr_type_node);
6139 DECL_CONTEXT (parmdecl) = fndecl;
6140 TREE_USED (parmdecl) = 1;
6141 DECL_ARGUMENTS (fndecl) = parmdecl;
6145 start_preparsed_function (fndecl, NULL_TREE, SF_PRE_PARSED);
6147 pop_lang_context ();
6149 return current_function_decl;
6152 /* Finish the cleanup function begun by start_cleanup_fn. */
6155 end_cleanup_fn (void)
6157 expand_or_defer_fn (finish_function (0));
6159 pop_from_top_level ();
6162 /* Generate code to handle the destruction of DECL, an object with
6163 static storage duration. */
6166 register_dtor_fn (tree decl)
6175 type = TREE_TYPE (decl);
6176 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (type))
6177 return void_zero_node;
6179 /* If we're using "__cxa_atexit" (or "__aeabi_atexit"), and DECL is
6180 a class object, we can just pass the destructor to
6181 "__cxa_atexit"; we don't have to build a temporary function to do
6183 use_dtor = (flag_use_cxa_atexit
6184 && !targetm.cxx.use_atexit_for_cxa_atexit ()
6185 && CLASS_TYPE_P (type));
6190 /* Find the destructor. */
6191 idx = lookup_fnfields_1 (type, complete_dtor_identifier);
6192 gcc_assert (idx >= 0);
6193 cleanup = VEC_index (tree, CLASSTYPE_METHOD_VEC (type), idx);
6194 /* Make sure it is accessible. */
6195 perform_or_defer_access_check (TYPE_BINFO (type), cleanup, cleanup);
6199 /* Call build_cleanup before we enter the anonymous function so
6200 that any access checks will be done relative to the current
6201 scope, rather than the scope of the anonymous function. */
6202 build_cleanup (decl);
6204 /* Now start the function. */
6205 cleanup = start_cleanup_fn ();
6207 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
6208 to the original function, rather than the anonymous one. That
6209 will make the back end think that nested functions are in use,
6210 which causes confusion. */
6211 push_deferring_access_checks (dk_no_check);
6212 fcall = build_cleanup (decl);
6213 pop_deferring_access_checks ();
6215 /* Create the body of the anonymous function. */
6216 compound_stmt = begin_compound_stmt (BCS_FN_BODY);
6217 finish_expr_stmt (fcall);
6218 finish_compound_stmt (compound_stmt);
6222 /* Call atexit with the cleanup function. */
6223 mark_used (cleanup);
6224 cleanup = build_address (cleanup);
6225 if (flag_use_cxa_atexit && !targetm.cxx.use_atexit_for_cxa_atexit ())
6231 /* We must convert CLEANUP to the type that "__cxa_atexit"
6233 cleanup = build_nop (get_atexit_fn_ptr_type (), cleanup);
6234 /* "__cxa_atexit" will pass the address of DECL to the
6235 cleanup function. */
6237 addr = build_address (decl);
6238 /* The declared type of the parameter to "__cxa_atexit" is
6239 "void *". For plain "T*", we could just let the
6240 machinery in cp_build_function_call convert it -- but if the
6241 type is "cv-qualified T *", then we need to convert it
6242 before passing it in, to avoid spurious errors. */
6243 addr = build_nop (ptr_type_node, addr);
6246 /* Since the cleanup functions we build ignore the address
6247 they're given, there's no reason to pass the actual address
6248 in, and, in general, it's cheaper to pass NULL than any
6250 addr = null_pointer_node;
6251 args = tree_cons (NULL_TREE,
6252 cp_build_unary_op (ADDR_EXPR, get_dso_handle_node (), 0,
6253 tf_warning_or_error),
6255 if (targetm.cxx.use_aeabi_atexit ())
6257 args = tree_cons (NULL_TREE, cleanup, args);
6258 args = tree_cons (NULL_TREE, addr, args);
6262 args = tree_cons (NULL_TREE, addr, args);
6263 args = tree_cons (NULL_TREE, cleanup, args);
6267 args = tree_cons (NULL_TREE, cleanup, NULL_TREE);
6268 return cp_build_function_call (get_atexit_node (), args,
6269 tf_warning_or_error);
6272 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
6273 is its initializer. Generate code to handle the construction
6274 and destruction of DECL. */
6277 expand_static_init (tree decl, tree init)
6279 gcc_assert (TREE_CODE (decl) == VAR_DECL);
6280 gcc_assert (TREE_STATIC (decl));
6282 /* Some variables require no initialization. */
6284 && !TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl))
6285 && TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
6288 if (DECL_FUNCTION_SCOPE_P (decl))
6290 /* Emit code to perform this initialization but once. */
6291 tree if_stmt = NULL_TREE, inner_if_stmt = NULL_TREE;
6292 tree then_clause = NULL_TREE, inner_then_clause = NULL_TREE;
6293 tree guard, guard_addr;
6294 tree acquire_fn, release_fn, abort_fn;
6297 /* Emit code to perform this initialization but once. This code
6300 static <type> guard;
6301 if (!guard.first_byte) {
6302 if (__cxa_guard_acquire (&guard)) {
6305 // Do initialization.
6306 flag = true; __cxa_guard_release (&guard);
6307 // Register variable for destruction at end of program.
6309 if (!flag) __cxa_guard_abort (&guard);
6313 Note that the `flag' variable is only set to 1 *after* the
6314 initialization is complete. This ensures that an exception,
6315 thrown during the construction, will cause the variable to
6316 reinitialized when we pass through this code again, as per:
6320 If the initialization exits by throwing an exception, the
6321 initialization is not complete, so it will be tried again
6322 the next time control enters the declaration.
6324 This process should be thread-safe, too; multiple threads
6325 should not be able to initialize the variable more than
6328 /* Create the guard variable. */
6329 guard = get_guard (decl);
6331 /* This optimization isn't safe on targets with relaxed memory
6332 consistency. On such targets we force synchronization in
6333 __cxa_guard_acquire. */
6334 if (!targetm.relaxed_ordering || !flag_threadsafe_statics)
6336 /* Begin the conditional initialization. */
6337 if_stmt = begin_if_stmt ();
6338 finish_if_stmt_cond (get_guard_cond (guard), if_stmt);
6339 then_clause = begin_compound_stmt (BCS_NO_SCOPE);
6342 if (flag_threadsafe_statics)
6344 guard_addr = build_address (guard);
6346 acquire_fn = get_identifier ("__cxa_guard_acquire");
6347 release_fn = get_identifier ("__cxa_guard_release");
6348 abort_fn = get_identifier ("__cxa_guard_abort");
6349 if (!get_global_value_if_present (acquire_fn, &acquire_fn))
6351 tree argtypes = tree_cons (NULL_TREE, TREE_TYPE (guard_addr),
6353 tree vfntype = build_function_type (void_type_node, argtypes);
6354 acquire_fn = push_library_fn
6355 (acquire_fn, build_function_type (integer_type_node, argtypes),
6357 release_fn = push_library_fn (release_fn, vfntype, NULL_TREE);
6358 abort_fn = push_library_fn (abort_fn, vfntype, NULL_TREE);
6362 release_fn = identifier_global_value (release_fn);
6363 abort_fn = identifier_global_value (abort_fn);
6366 inner_if_stmt = begin_if_stmt ();
6367 finish_if_stmt_cond (build_call_n (acquire_fn, 1, guard_addr),
6370 inner_then_clause = begin_compound_stmt (BCS_NO_SCOPE);
6371 begin = get_target_expr (boolean_false_node);
6372 flag = TARGET_EXPR_SLOT (begin);
6374 TARGET_EXPR_CLEANUP (begin)
6375 = build3 (COND_EXPR, void_type_node, flag,
6377 build_call_n (abort_fn, 1, guard_addr));
6378 CLEANUP_EH_ONLY (begin) = 1;
6380 /* Do the initialization itself. */
6381 init = add_stmt_to_compound (begin, init);
6382 init = add_stmt_to_compound
6383 (init, build2 (MODIFY_EXPR, void_type_node, flag, boolean_true_node));
6384 init = add_stmt_to_compound
6385 (init, build_call_n (release_fn, 1, guard_addr));
6388 init = add_stmt_to_compound (init, set_guard (guard));
6390 /* Use atexit to register a function for destroying this static
6392 init = add_stmt_to_compound (init, register_dtor_fn (decl));
6394 finish_expr_stmt (init);
6396 if (flag_threadsafe_statics)
6398 finish_compound_stmt (inner_then_clause);
6399 finish_then_clause (inner_if_stmt);
6400 finish_if_stmt (inner_if_stmt);
6403 if (!targetm.relaxed_ordering || !flag_threadsafe_statics)
6405 finish_compound_stmt (then_clause);
6406 finish_then_clause (if_stmt);
6407 finish_if_stmt (if_stmt);
6411 static_aggregates = tree_cons (init, decl, static_aggregates);
6415 /* Make TYPE a complete type based on INITIAL_VALUE.
6416 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
6417 2 if there was no information (in which case assume 0 if DO_DEFAULT),
6418 3 if the initializer list is empty (in pedantic mode). */
6421 cp_complete_array_type (tree *ptype, tree initial_value, bool do_default)
6424 tree type, elt_type;
6428 unsigned HOST_WIDE_INT i;
6431 /* An array of character type can be initialized from a
6432 brace-enclosed string constant.
6434 FIXME: this code is duplicated from reshape_init. Probably
6435 we should just call reshape_init here? */
6436 if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (*ptype)))
6437 && TREE_CODE (initial_value) == CONSTRUCTOR
6438 && !VEC_empty (constructor_elt, CONSTRUCTOR_ELTS (initial_value)))
6440 VEC(constructor_elt,gc) *v = CONSTRUCTOR_ELTS (initial_value);
6441 tree value = VEC_index (constructor_elt, v, 0)->value;
6443 if (TREE_CODE (value) == STRING_CST
6444 && VEC_length (constructor_elt, v) == 1)
6445 initial_value = value;
6448 /* If any of the elements are parameter packs, we can't actually
6449 complete this type now because the array size is dependent. */
6450 if (TREE_CODE (initial_value) == CONSTRUCTOR)
6452 FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (initial_value),
6455 if (PACK_EXPANSION_P (value))
6461 failure = complete_array_type (ptype, initial_value, do_default);
6463 /* We can create the array before the element type is complete, which
6464 means that we didn't have these two bits set in the original type
6465 either. In completing the type, we are expected to propagate these
6466 bits. See also complete_type which does the same thing for arrays
6469 if (TYPE_DOMAIN (type))
6471 elt_type = TREE_TYPE (type);
6472 TYPE_NEEDS_CONSTRUCTING (type) = TYPE_NEEDS_CONSTRUCTING (elt_type);
6473 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type)
6474 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (elt_type);
6480 /* Return zero if something is declared to be a member of type
6481 CTYPE when in the context of CUR_TYPE. STRING is the error
6482 message to print in that case. Otherwise, quietly return 1. */
6485 member_function_or_else (tree ctype, tree cur_type, enum overload_flags flags)
6487 if (ctype && ctype != cur_type)
6489 if (flags == DTOR_FLAG)
6490 error ("destructor for alien class %qT cannot be a member", ctype);
6492 error ("constructor for alien class %qT cannot be a member", ctype);
6498 /* Subroutine of `grokdeclarator'. */
6500 /* Generate errors possibly applicable for a given set of specifiers.
6501 This is for ARM $7.1.2. */
6504 bad_specifiers (tree object,
6513 error ("%qD declared as a %<virtual%> %s", object, type);
6515 error ("%qD declared as an %<inline%> %s", object, type);
6517 error ("%<const%> and %<volatile%> function specifiers on "
6518 "%qD invalid in %s declaration",
6521 error ("%q+D declared as a friend", object);
6523 && (TREE_CODE (object) == TYPE_DECL
6524 || (!TYPE_PTRFN_P (TREE_TYPE (object))
6525 && !TYPE_REFFN_P (TREE_TYPE (object))
6526 && !TYPE_PTRMEMFUNC_P (TREE_TYPE (object)))))
6527 error ("%q+D declared with an exception specification", object);
6530 /* DECL is a member function or static data member and is presently
6531 being defined. Check that the definition is taking place in a
6535 check_class_member_definition_namespace (tree decl)
6537 /* These checks only apply to member functions and static data
6539 gcc_assert (TREE_CODE (decl) == FUNCTION_DECL
6540 || TREE_CODE (decl) == VAR_DECL);
6541 /* We check for problems with specializations in pt.c in
6542 check_specialization_namespace, where we can issue better
6544 if (processing_specialization)
6546 /* There are no restrictions on the placement of
6547 explicit instantiations. */
6548 if (processing_explicit_instantiation)
6552 A member function definition that appears outside of the
6553 class definition shall appear in a namespace scope enclosing
6554 the class definition.
6558 The definition for a static data member shall appear in a
6559 namespace scope enclosing the member's class definition. */
6560 if (!is_ancestor (current_namespace, DECL_CONTEXT (decl)))
6561 permerror (input_location, "definition of %qD is not in namespace enclosing %qT",
6562 decl, DECL_CONTEXT (decl));
6565 /* Build a PARM_DECL for the "this" parameter. TYPE is the
6566 METHOD_TYPE for a non-static member function; QUALS are the
6567 cv-qualifiers that apply to the function. */
6570 build_this_parm (tree type, cp_cv_quals quals)
6575 cp_cv_quals this_quals;
6577 this_type = TREE_VALUE (TYPE_ARG_TYPES (type));
6578 /* The `this' parameter is implicitly `const'; it cannot be
6580 this_quals = (quals & TYPE_QUAL_RESTRICT) | TYPE_QUAL_CONST;
6581 qual_type = cp_build_qualified_type (this_type, this_quals);
6582 parm = build_artificial_parm (this_identifier, qual_type);
6583 cp_apply_type_quals_to_decl (this_quals, parm);
6587 /* CTYPE is class type, or null if non-class.
6588 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
6590 DECLARATOR is the function's name.
6591 PARMS is a chain of PARM_DECLs for the function.
6592 VIRTUALP is truthvalue of whether the function is virtual or not.
6593 FLAGS are to be passed through to `grokclassfn'.
6594 QUALS are qualifiers indicating whether the function is `const'
6596 RAISES is a list of exceptions that this function can raise.
6597 CHECK is 1 if we must find this method in CTYPE, 0 if we should
6598 not look, and -1 if we should not call `grokclassfn' at all.
6600 SFK is the kind of special function (if any) for the new function.
6602 Returns `NULL_TREE' if something goes wrong, after issuing
6603 applicable error messages. */
6606 grokfndecl (tree ctype,
6610 tree orig_declarator,
6612 enum overload_flags flags,
6619 special_function_kind sfk,
6624 location_t location)
6627 int staticp = ctype && TREE_CODE (type) == FUNCTION_TYPE;
6631 type = build_exception_variant (type, raises);
6633 decl = build_lang_decl (FUNCTION_DECL, declarator, type);
6635 /* If we have an explicit location, use it, otherwise use whatever
6636 build_lang_decl used (probably input_location). */
6637 if (location != UNKNOWN_LOCATION)
6638 DECL_SOURCE_LOCATION (decl) = location;
6640 if (TREE_CODE (type) == METHOD_TYPE)
6643 parm = build_this_parm (type, quals);
6644 TREE_CHAIN (parm) = parms;
6647 DECL_ARGUMENTS (decl) = parms;
6648 for (t = parms; t; t = TREE_CHAIN (t))
6649 DECL_CONTEXT (t) = decl;
6650 /* Propagate volatile out from type to decl. */
6651 if (TYPE_VOLATILE (type))
6652 TREE_THIS_VOLATILE (decl) = 1;
6654 /* Setup decl according to sfk. */
6657 case sfk_constructor:
6658 case sfk_copy_constructor:
6659 case sfk_move_constructor:
6660 DECL_CONSTRUCTOR_P (decl) = 1;
6662 case sfk_destructor:
6663 DECL_DESTRUCTOR_P (decl) = 1;
6669 /* If pointers to member functions use the least significant bit to
6670 indicate whether a function is virtual, ensure a pointer
6671 to this function will have that bit clear. */
6672 if (TARGET_PTRMEMFUNC_VBIT_LOCATION == ptrmemfunc_vbit_in_pfn
6673 && TREE_CODE (type) == METHOD_TYPE
6674 && DECL_ALIGN (decl) < 2 * BITS_PER_UNIT)
6675 DECL_ALIGN (decl) = 2 * BITS_PER_UNIT;
6678 && TREE_CODE (orig_declarator) == TEMPLATE_ID_EXPR)
6682 ("defining explicit specialization %qD in friend declaration",
6686 tree fns = TREE_OPERAND (orig_declarator, 0);
6687 tree args = TREE_OPERAND (orig_declarator, 1);
6689 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
6691 /* Something like `template <class T> friend void f<T>()'. */
6692 error ("invalid use of template-id %qD in declaration "
6693 "of primary template",
6699 /* A friend declaration of the form friend void f<>(). Record
6700 the information in the TEMPLATE_ID_EXPR. */
6701 SET_DECL_IMPLICIT_INSTANTIATION (decl);
6703 if (TREE_CODE (fns) == COMPONENT_REF)
6705 /* Due to bison parser ickiness, we will have already looked
6706 up an operator_name or PFUNCNAME within the current class
6707 (see template_id in parse.y). If the current class contains
6708 such a name, we'll get a COMPONENT_REF here. Undo that. */
6710 gcc_assert (TREE_TYPE (TREE_OPERAND (fns, 0))
6711 == current_class_type);
6712 fns = TREE_OPERAND (fns, 1);
6714 gcc_assert (TREE_CODE (fns) == IDENTIFIER_NODE
6715 || TREE_CODE (fns) == OVERLOAD);
6716 DECL_TEMPLATE_INFO (decl) = build_template_info (fns, args);
6718 for (t = TYPE_ARG_TYPES (TREE_TYPE (decl)); t; t = TREE_CHAIN (t))
6719 if (TREE_PURPOSE (t)
6720 && TREE_CODE (TREE_PURPOSE (t)) == DEFAULT_ARG)
6722 error ("default arguments are not allowed in declaration "
6723 "of friend template specialization %qD",
6730 error ("%<inline%> is not allowed in declaration of friend "
6731 "template specialization %qD",
6738 /* If this decl has namespace scope, set that up. */
6740 set_decl_namespace (decl, in_namespace, friendp);
6742 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
6744 /* `main' and builtins have implicit 'C' linkage. */
6745 if ((MAIN_NAME_P (declarator)
6746 || (IDENTIFIER_LENGTH (declarator) > 10
6747 && IDENTIFIER_POINTER (declarator)[0] == '_'
6748 && IDENTIFIER_POINTER (declarator)[1] == '_'
6749 && strncmp (IDENTIFIER_POINTER (declarator)+2, "builtin_", 8) == 0))
6750 && current_lang_name == lang_name_cplusplus
6751 && ctype == NULL_TREE
6752 /* NULL_TREE means global namespace. */
6753 && DECL_CONTEXT (decl) == NULL_TREE)
6754 SET_DECL_LANGUAGE (decl, lang_c);
6756 /* Should probably propagate const out from type to decl I bet (mrs). */
6759 DECL_STATIC_FUNCTION_P (decl) = 1;
6760 DECL_CONTEXT (decl) = ctype;
6765 DECL_CONTEXT (decl) = ctype;
6767 check_class_member_definition_namespace (decl);
6770 if (ctype == NULL_TREE && DECL_MAIN_P (decl))
6772 if (processing_template_decl)
6773 error ("cannot declare %<::main%> to be a template");
6775 error ("cannot declare %<::main%> to be inline");
6777 error ("cannot declare %<::main%> to be static");
6782 /* Members of anonymous types and local classes have no linkage; make
6783 them internal. If a typedef is made later, this will be changed. */
6784 if (ctype && (TYPE_ANONYMOUS_P (ctype)
6785 || decl_function_context (TYPE_MAIN_DECL (ctype))))
6788 if (publicp && cxx_dialect == cxx98)
6790 /* [basic.link]: A name with no linkage (notably, the name of a class
6791 or enumeration declared in a local scope) shall not be used to
6792 declare an entity with linkage.
6794 DR 757 relaxes this restriction for C++0x. */
6795 t = no_linkage_check (TREE_TYPE (decl),
6796 /*relaxed_p=*/false);
6799 if (TYPE_ANONYMOUS_P (t))
6801 if (DECL_EXTERN_C_P (decl))
6802 /* Allow this; it's pretty common in C. */;
6805 permerror (input_location, "non-local function %q#D uses anonymous type",
6807 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
6808 permerror (input_location, "%q+#D does not refer to the unqualified "
6809 "type, so it is not used for linkage",
6814 permerror (input_location, "non-local function %q#D uses local type %qT", decl, t);
6818 TREE_PUBLIC (decl) = publicp;
6821 DECL_INTERFACE_KNOWN (decl) = 1;
6822 DECL_NOT_REALLY_EXTERN (decl) = 1;
6825 /* If the declaration was declared inline, mark it as such. */
6827 DECL_DECLARED_INLINE_P (decl) = 1;
6829 DECL_EXTERNAL (decl) = 1;
6830 if (quals && TREE_CODE (type) == FUNCTION_TYPE)
6833 ? G_("static member function %qD cannot have cv-qualifier")
6834 : G_("non-member function %qD cannot have cv-qualifier"),
6836 quals = TYPE_UNQUALIFIED;
6839 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl))
6840 && !grok_op_properties (decl, /*complain=*/true))
6844 /* Make the init_value nonzero so pushdecl knows this is not
6845 tentative. error_mark_node is replaced later with the BLOCK. */
6846 DECL_INITIAL (decl) = error_mark_node;
6848 if (TYPE_NOTHROW_P (type) || nothrow_libfn_p (decl))
6849 TREE_NOTHROW (decl) = 1;
6851 /* Caller will do the rest of this. */
6855 if (ctype != NULL_TREE)
6856 grokclassfn (ctype, decl, flags);
6858 decl = check_explicit_specialization (orig_declarator, decl,
6861 4 * (friendp != 0));
6862 if (decl == error_mark_node)
6867 cplus_decl_attributes (&decl, *attrlist, 0);
6868 *attrlist = NULL_TREE;
6871 /* Check main's type after attributes have been applied. */
6872 if (ctype == NULL_TREE && DECL_MAIN_P (decl))
6874 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl)),
6877 tree oldtypeargs = TYPE_ARG_TYPES (TREE_TYPE (decl));
6879 error ("%<::main%> must return %<int%>");
6880 newtype = build_function_type (integer_type_node, oldtypeargs);
6881 TREE_TYPE (decl) = newtype;
6884 check_main_parameter_types (decl);
6887 if (ctype != NULL_TREE
6888 && (! TYPE_FOR_JAVA (ctype) || check_java_method (decl))
6891 tree old_decl = check_classfn (ctype, decl,
6892 (processing_template_decl
6893 > template_class_depth (ctype))
6894 ? current_template_parms
6897 if (old_decl == error_mark_node)
6905 if (TREE_CODE (old_decl) == TEMPLATE_DECL)
6906 /* Because grokfndecl is always supposed to return a
6907 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
6908 here. We depend on our callers to figure out that its
6909 really a template that's being returned. */
6910 old_decl = DECL_TEMPLATE_RESULT (old_decl);
6912 if (DECL_STATIC_FUNCTION_P (old_decl)
6913 && TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE)
6914 /* Remove the `this' parm added by grokclassfn.
6915 XXX Isn't this done in start_function, too? */
6916 revert_static_member_fn (decl);
6917 if (DECL_ARTIFICIAL (old_decl))
6919 error ("definition of implicitly-declared %qD", old_decl);
6923 /* Since we've smashed OLD_DECL to its
6924 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
6925 if (TREE_CODE (decl) == TEMPLATE_DECL)
6926 decl = DECL_TEMPLATE_RESULT (decl);
6928 /* Attempt to merge the declarations. This can fail, in
6929 the case of some invalid specialization declarations. */
6930 pushed_scope = push_scope (ctype);
6931 ok = duplicate_decls (decl, old_decl, friendp);
6933 pop_scope (pushed_scope);
6936 error ("no %q#D member function declared in class %qT",
6944 if (DECL_CONSTRUCTOR_P (decl) && !grok_ctor_properties (ctype, decl))
6947 if (ctype == NULL_TREE || check)
6951 DECL_VIRTUAL_P (decl) = 1;
6956 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
6957 the linkage that DECL will receive in the object file. */
6960 set_linkage_for_static_data_member (tree decl)
6962 /* A static data member always has static storage duration and
6963 external linkage. Note that static data members are forbidden in
6964 local classes -- the only situation in which a class has
6965 non-external linkage. */
6966 TREE_PUBLIC (decl) = 1;
6967 TREE_STATIC (decl) = 1;
6968 /* For non-template classes, static data members are always put
6969 out in exactly those files where they are defined, just as
6970 with ordinary namespace-scope variables. */
6971 if (!processing_template_decl)
6972 DECL_INTERFACE_KNOWN (decl) = 1;
6975 /* Create a VAR_DECL named NAME with the indicated TYPE.
6977 If SCOPE is non-NULL, it is the class type or namespace containing
6978 the variable. If SCOPE is NULL, the variable should is created in
6979 the innermost enclosings scope. */
6982 grokvardecl (tree type,
6984 const cp_decl_specifier_seq *declspecs,
6990 tree explicit_scope;
6992 gcc_assert (!name || TREE_CODE (name) == IDENTIFIER_NODE);
6994 /* Compute the scope in which to place the variable, but remember
6995 whether or not that scope was explicitly specified by the user. */
6996 explicit_scope = scope;
6999 /* An explicit "extern" specifier indicates a namespace-scope
7001 if (declspecs->storage_class == sc_extern)
7002 scope = current_namespace;
7003 else if (!at_function_scope_p ())
7004 scope = current_scope ();
7008 && (/* If the variable is a namespace-scope variable declared in a
7009 template, we need DECL_LANG_SPECIFIC. */
7010 (TREE_CODE (scope) == NAMESPACE_DECL && processing_template_decl)
7011 /* Similarly for namespace-scope variables with language linkage
7013 || (TREE_CODE (scope) == NAMESPACE_DECL
7014 && current_lang_name != lang_name_cplusplus)
7015 /* Similarly for static data members. */
7017 decl = build_lang_decl (VAR_DECL, name, type);
7019 decl = build_decl (input_location, VAR_DECL, name, type);
7021 if (explicit_scope && TREE_CODE (explicit_scope) == NAMESPACE_DECL)
7022 set_decl_namespace (decl, explicit_scope, 0);
7024 DECL_CONTEXT (decl) = FROB_CONTEXT (scope);
7026 if (declspecs->storage_class == sc_extern)
7028 DECL_THIS_EXTERN (decl) = 1;
7029 DECL_EXTERNAL (decl) = !initialized;
7032 if (DECL_CLASS_SCOPE_P (decl))
7034 set_linkage_for_static_data_member (decl);
7035 /* This function is only called with out-of-class definitions. */
7036 DECL_EXTERNAL (decl) = 0;
7037 check_class_member_definition_namespace (decl);
7039 /* At top level, either `static' or no s.c. makes a definition
7040 (perhaps tentative), and absence of `static' makes it public. */
7041 else if (toplevel_bindings_p ())
7043 TREE_PUBLIC (decl) = (declspecs->storage_class != sc_static
7044 && (DECL_THIS_EXTERN (decl) || ! constp));
7045 TREE_STATIC (decl) = ! DECL_EXTERNAL (decl);
7047 /* Not at top level, only `static' makes a static definition. */
7050 TREE_STATIC (decl) = declspecs->storage_class == sc_static;
7051 TREE_PUBLIC (decl) = DECL_EXTERNAL (decl);
7054 if (declspecs->specs[(int)ds_thread])
7055 DECL_TLS_MODEL (decl) = decl_default_tls_model (decl);
7057 /* If the type of the decl has no linkage, make sure that we'll
7058 notice that in mark_used. */
7059 if (cxx_dialect > cxx98
7060 && decl_linkage (decl) != lk_none
7061 && DECL_LANG_SPECIFIC (decl) == NULL
7062 && !DECL_EXTERN_C_P (decl)
7063 && no_linkage_check (TREE_TYPE (decl), /*relaxed_p=*/false))
7064 retrofit_lang_decl (decl);
7066 if (TREE_PUBLIC (decl))
7068 /* [basic.link]: A name with no linkage (notably, the name of a class
7069 or enumeration declared in a local scope) shall not be used to
7070 declare an entity with linkage.
7072 DR 757 relaxes this restriction for C++0x. */
7073 tree t = (cxx_dialect > cxx98 ? NULL_TREE
7074 : no_linkage_check (TREE_TYPE (decl), /*relaxed_p=*/false));
7077 if (TYPE_ANONYMOUS_P (t))
7079 if (DECL_EXTERN_C_P (decl))
7080 /* Allow this; it's pretty common in C. */
7084 /* DRs 132, 319 and 389 seem to indicate types with
7085 no linkage can only be used to declare extern "C"
7086 entities. Since it's not always an error in the
7087 ISO C++ 90 Standard, we only issue a warning. */
7088 warning (0, "non-local variable %q#D uses anonymous type",
7090 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
7091 warning (0, "%q+#D does not refer to the unqualified "
7092 "type, so it is not used for linkage",
7097 warning (0, "non-local variable %q#D uses local type %qT", decl, t);
7101 DECL_INTERFACE_KNOWN (decl) = 1;
7106 /* Create and return a canonical pointer to member function type, for
7107 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
7110 build_ptrmemfunc_type (tree type)
7114 tree unqualified_variant = NULL_TREE;
7116 if (type == error_mark_node)
7119 /* If a canonical type already exists for this type, use it. We use
7120 this method instead of type_hash_canon, because it only does a
7121 simple equality check on the list of field members. */
7123 if ((t = TYPE_GET_PTRMEMFUNC_TYPE (type)))
7126 /* Make sure that we always have the unqualified pointer-to-member
7128 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
7130 = build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type));
7132 t = make_class_type (RECORD_TYPE);
7133 xref_basetypes (t, NULL_TREE);
7135 /* Let the front end know this is a pointer to member function... */
7136 TYPE_PTRMEMFUNC_FLAG (t) = 1;
7137 /* ... and not really a class type. */
7138 SET_CLASS_TYPE_P (t, 0);
7140 field = build_decl (input_location, FIELD_DECL, pfn_identifier, type);
7143 field = build_decl (input_location, FIELD_DECL, delta_identifier,
7145 TREE_CHAIN (field) = fields;
7148 finish_builtin_struct (t, "__ptrmemfunc_type", fields, ptr_type_node);
7150 /* Zap out the name so that the back end will give us the debugging
7151 information for this anonymous RECORD_TYPE. */
7152 TYPE_NAME (t) = NULL_TREE;
7154 /* If this is not the unqualified form of this pointer-to-member
7155 type, set the TYPE_MAIN_VARIANT for this type to be the
7156 unqualified type. Since they are actually RECORD_TYPEs that are
7157 not variants of each other, we must do this manually.
7158 As we just built a new type there is no need to do yet another copy. */
7159 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
7161 int type_quals = cp_type_quals (type);
7162 TYPE_READONLY (t) = (type_quals & TYPE_QUAL_CONST) != 0;
7163 TYPE_VOLATILE (t) = (type_quals & TYPE_QUAL_VOLATILE) != 0;
7164 TYPE_RESTRICT (t) = (type_quals & TYPE_QUAL_RESTRICT) != 0;
7165 TYPE_MAIN_VARIANT (t) = unqualified_variant;
7166 TYPE_NEXT_VARIANT (t) = TYPE_NEXT_VARIANT (unqualified_variant);
7167 TYPE_NEXT_VARIANT (unqualified_variant) = t;
7168 TREE_TYPE (TYPE_BINFO (t)) = t;
7171 /* Cache this pointer-to-member type so that we can find it again
7173 TYPE_SET_PTRMEMFUNC_TYPE (type, t);
7175 if (TYPE_STRUCTURAL_EQUALITY_P (type))
7176 SET_TYPE_STRUCTURAL_EQUALITY (t);
7177 else if (TYPE_CANONICAL (type) != type)
7178 TYPE_CANONICAL (t) = build_ptrmemfunc_type (TYPE_CANONICAL (type));
7183 /* Create and return a pointer to data member type. */
7186 build_ptrmem_type (tree class_type, tree member_type)
7188 if (TREE_CODE (member_type) == METHOD_TYPE)
7190 tree arg_types = TYPE_ARG_TYPES (member_type);
7191 cp_cv_quals quals = cp_type_quals (TREE_TYPE (TREE_VALUE (arg_types)));
7192 member_type = build_memfn_type (member_type, class_type, quals);
7193 return build_ptrmemfunc_type (build_pointer_type (member_type));
7197 gcc_assert (TREE_CODE (member_type) != FUNCTION_TYPE);
7198 return build_offset_type (class_type, member_type);
7202 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
7203 Check to see that the definition is valid. Issue appropriate error
7204 messages. Return 1 if the definition is particularly bad, or 0
7208 check_static_variable_definition (tree decl, tree type)
7210 /* Motion 10 at San Diego: If a static const integral data member is
7211 initialized with an integral constant expression, the initializer
7212 may appear either in the declaration (within the class), or in
7213 the definition, but not both. If it appears in the class, the
7214 member is a member constant. The file-scope definition is always
7216 if (!ARITHMETIC_TYPE_P (type) && TREE_CODE (type) != ENUMERAL_TYPE)
7218 error ("invalid in-class initialization of static data member "
7219 "of non-integral type %qT",
7221 /* If we just return the declaration, crashes will sometimes
7222 occur. We therefore return void_type_node, as if this were a
7223 friend declaration, to cause callers to completely ignore
7224 this declaration. */
7227 else if (!CP_TYPE_CONST_P (type))
7228 error ("ISO C++ forbids in-class initialization of non-const "
7229 "static member %qD",
7231 else if (!INTEGRAL_OR_ENUMERATION_TYPE_P (type))
7232 pedwarn (input_location, OPT_pedantic, "ISO C++ forbids initialization of member constant "
7233 "%qD of non-integral type %qT", decl, type);
7238 /* Given the SIZE (i.e., number of elements) in an array, compute an
7239 appropriate index type for the array. If non-NULL, NAME is the
7240 name of the thing being declared. */
7243 compute_array_index_type (tree name, tree size)
7247 tree abi_1_itype = NULL_TREE;
7249 if (error_operand_p (size))
7250 return error_mark_node;
7252 type = TREE_TYPE (size);
7253 /* The array bound must be an integer type. */
7254 if (!dependent_type_p (type) && !INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type))
7257 error ("size of array %qD has non-integral type %qT", name, type);
7259 error ("size of array has non-integral type %qT", type);
7260 size = integer_one_node;
7261 type = TREE_TYPE (size);
7264 /* We can only call value_dependent_expression_p on integral constant
7265 expressions; the parser adds a dummy NOP_EXPR with TREE_SIDE_EFFECTS
7266 set if this isn't one. */
7267 if (processing_template_decl
7268 && (TREE_SIDE_EFFECTS (size) || value_dependent_expression_p (size)))
7270 /* We cannot do any checking for a SIZE that isn't known to be
7271 constant. Just build the index type and mark that it requires
7272 structural equality checks. */
7273 itype = build_index_type (build_min (MINUS_EXPR, sizetype,
7274 size, integer_one_node));
7275 TYPE_DEPENDENT_P (itype) = 1;
7276 TYPE_DEPENDENT_P_VALID (itype) = 1;
7277 SET_TYPE_STRUCTURAL_EQUALITY (itype);
7281 if (!abi_version_at_least (2) && processing_template_decl)
7282 /* For abi-1, we handled all instances in templates the same way,
7283 even when they were non-dependent. This affects the manglings
7284 produced. So, we do the normal checking for non-dependent
7285 sizes, but at the end we'll return the same type that abi-1
7286 would have, but with TYPE_CANONICAL set to the "right"
7287 value that the current ABI would provide. */
7288 abi_1_itype = build_index_type (build_min (MINUS_EXPR, sizetype,
7289 size, integer_one_node));
7291 /* The size might be the result of a cast. */
7292 STRIP_TYPE_NOPS (size);
7294 /* It might be a const variable or enumeration constant. */
7295 size = integral_constant_value (size);
7297 /* Normally, the array-bound will be a constant. */
7298 if (TREE_CODE (size) == INTEGER_CST)
7300 /* Check to see if the array bound overflowed. Make that an
7301 error, no matter how generous we're being. */
7302 constant_expression_error (size);
7304 /* An array must have a positive number of elements. */
7305 if (INT_CST_LT (size, integer_zero_node))
7308 error ("size of array %qD is negative", name);
7310 error ("size of array is negative");
7311 size = integer_one_node;
7313 /* As an extension we allow zero-sized arrays. We always allow
7314 them in system headers because glibc uses them. */
7315 else if (integer_zerop (size) && !in_system_header)
7318 pedwarn (input_location, OPT_pedantic, "ISO C++ forbids zero-size array %qD", name);
7320 pedwarn (input_location, OPT_pedantic, "ISO C++ forbids zero-size array");
7323 else if (TREE_CONSTANT (size))
7325 /* `(int) &fn' is not a valid array bound. */
7327 error ("size of array %qD is not an integral constant-expression",
7330 error ("size of array is not an integral constant-expression");
7331 size = integer_one_node;
7333 else if (pedantic && warn_vla != 0)
7336 pedwarn (input_location, OPT_Wvla, "ISO C++ forbids variable length array %qD", name);
7338 pedwarn (input_location, OPT_Wvla, "ISO C++ forbids variable length array");
7340 else if (warn_vla > 0)
7344 "variable length array %qD is used", name);
7347 "variable length array is used");
7350 if (processing_template_decl && !TREE_CONSTANT (size))
7351 /* A variable sized array. */
7352 itype = build_min (MINUS_EXPR, sizetype, size, integer_one_node);
7355 HOST_WIDE_INT saved_processing_template_decl;
7357 /* Compute the index of the largest element in the array. It is
7358 one less than the number of elements in the array. We save
7359 and restore PROCESSING_TEMPLATE_DECL so that computations in
7360 cp_build_binary_op will be appropriately folded. */
7361 saved_processing_template_decl = processing_template_decl;
7362 processing_template_decl = 0;
7363 itype = cp_build_binary_op (input_location,
7365 cp_convert (ssizetype, size),
7366 cp_convert (ssizetype, integer_one_node),
7367 tf_warning_or_error);
7368 itype = fold (itype);
7369 processing_template_decl = saved_processing_template_decl;
7371 if (!TREE_CONSTANT (itype))
7372 /* A variable sized array. */
7373 itype = variable_size (itype);
7374 /* Make sure that there was no overflow when creating to a signed
7375 index type. (For example, on a 32-bit machine, an array with
7376 size 2^32 - 1 is too big.) */
7377 else if (TREE_CODE (itype) == INTEGER_CST
7378 && TREE_OVERFLOW (itype))
7380 error ("overflow in array dimension");
7381 TREE_OVERFLOW (itype) = 0;
7385 /* Create and return the appropriate index type. */
7388 tree t = build_index_type (itype);
7389 TYPE_CANONICAL (abi_1_itype) = TYPE_CANONICAL (t);
7393 return build_index_type (itype);
7396 /* Returns the scope (if any) in which the entity declared by
7397 DECLARATOR will be located. If the entity was declared with an
7398 unqualified name, NULL_TREE is returned. */
7401 get_scope_of_declarator (const cp_declarator *declarator)
7403 while (declarator && declarator->kind != cdk_id)
7404 declarator = declarator->declarator;
7406 /* If the declarator-id is a SCOPE_REF, the scope in which the
7407 declaration occurs is the first operand. */
7409 && declarator->u.id.qualifying_scope)
7410 return declarator->u.id.qualifying_scope;
7412 /* Otherwise, the declarator is not a qualified name; the entity will
7413 be declared in the current scope. */
7417 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
7418 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
7422 create_array_type_for_decl (tree name, tree type, tree size)
7424 tree itype = NULL_TREE;
7426 /* If things have already gone awry, bail now. */
7427 if (type == error_mark_node || size == error_mark_node)
7428 return error_mark_node;
7430 /* If there are some types which cannot be array elements,
7431 issue an error-message and return. */
7432 switch (TREE_CODE (type))
7436 error ("declaration of %qD as array of void", name);
7438 error ("creating array of void");
7439 return error_mark_node;
7443 error ("declaration of %qD as array of functions", name);
7445 error ("creating array of functions");
7446 return error_mark_node;
7448 case REFERENCE_TYPE:
7450 error ("declaration of %qD as array of references", name);
7452 error ("creating array of references");
7453 return error_mark_node;
7457 error ("declaration of %qD as array of function members", name);
7459 error ("creating array of function members");
7460 return error_mark_node;
7468 The constant expressions that specify the bounds of the arrays
7469 can be omitted only for the first member of the sequence. */
7470 if (TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type))
7473 error ("declaration of %qD as multidimensional array must "
7474 "have bounds for all dimensions except the first",
7477 error ("multidimensional array must have bounds for all "
7478 "dimensions except the first");
7480 return error_mark_node;
7483 /* Figure out the index type for the array. */
7485 itype = compute_array_index_type (name, size);
7488 T is called the array element type; this type shall not be [...] an
7489 abstract class type. */
7490 abstract_virtuals_error (name, type);
7492 return build_cplus_array_type (type, itype);
7495 /* Check that it's OK to declare a function with the indicated TYPE.
7496 SFK indicates the kind of special function (if any) that this
7497 function is. OPTYPE is the type given in a conversion operator
7498 declaration, or the class type for a constructor/destructor.
7499 Returns the actual return type of the function; that
7500 may be different than TYPE if an error occurs, or for certain
7501 special functions. */
7504 check_special_function_return_type (special_function_kind sfk,
7510 case sfk_constructor:
7512 error ("return type specification for constructor invalid");
7514 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
7515 type = build_pointer_type (optype);
7517 type = void_type_node;
7520 case sfk_destructor:
7522 error ("return type specification for destructor invalid");
7523 /* We can't use the proper return type here because we run into
7524 problems with ambiguous bases and covariant returns.
7525 Java classes are left unchanged because (void *) isn't a valid
7526 Java type, and we don't want to change the Java ABI. */
7527 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
7528 type = build_pointer_type (void_type_node);
7530 type = void_type_node;
7533 case sfk_conversion:
7535 error ("return type specified for %<operator %T%>", optype);
7546 /* A variable or data member (whose unqualified name is IDENTIFIER)
7547 has been declared with the indicated TYPE. If the TYPE is not
7548 acceptable, issue an error message and return a type to use for
7549 error-recovery purposes. */
7552 check_var_type (tree identifier, tree type)
7554 if (VOID_TYPE_P (type))
7557 error ("unnamed variable or field declared void");
7558 else if (TREE_CODE (identifier) == IDENTIFIER_NODE)
7560 gcc_assert (!IDENTIFIER_OPNAME_P (identifier));
7561 error ("variable or field %qE declared void", identifier);
7564 error ("variable or field declared void");
7565 type = error_mark_node;
7571 /* Given declspecs and a declarator (abstract or otherwise), determine
7572 the name and type of the object declared and construct a DECL node
7575 DECLSPECS points to the representation of declaration-specifier
7576 sequence that precedes declarator.
7578 DECL_CONTEXT says which syntactic context this declaration is in:
7579 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
7580 FUNCDEF for a function definition. Like NORMAL but a few different
7581 error messages in each case. Return value may be zero meaning
7582 this definition is too screwy to try to parse.
7583 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
7584 handle member functions (which have FIELD context).
7585 Return value may be zero meaning this definition is too screwy to
7587 PARM for a parameter declaration (either within a function prototype
7588 or before a function body). Make a PARM_DECL, or return void_type_node.
7589 TPARM for a template parameter declaration.
7590 CATCHPARM for a parameter declaration before a catch clause.
7591 TYPENAME if for a typename (in a cast or sizeof).
7592 Don't make a DECL node; just return the ..._TYPE node.
7593 FIELD for a struct or union field; make a FIELD_DECL.
7594 BITFIELD for a field with specified width.
7596 INITIALIZED is as for start_decl.
7598 ATTRLIST is a pointer to the list of attributes, which may be NULL
7599 if there are none; *ATTRLIST may be modified if attributes from inside
7600 the declarator should be applied to the declaration.
7602 When this function is called, scoping variables (such as
7603 CURRENT_CLASS_TYPE) should reflect the scope in which the
7604 declaration occurs, not the scope in which the new declaration will
7605 be placed. For example, on:
7609 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
7612 Returns a DECL (if a declarator is present), a TYPE (if there is no
7613 declarator, in cases like "struct S;"), or the ERROR_MARK_NODE if an
7617 grokdeclarator (const cp_declarator *declarator,
7618 const cp_decl_specifier_seq *declspecs,
7619 enum decl_context decl_context,
7623 tree type = NULL_TREE;
7625 int virtualp, explicitp, friendp, inlinep, staticp;
7626 int explicit_int = 0;
7627 int explicit_char = 0;
7628 int defaulted_int = 0;
7629 tree dependent_name = NULL_TREE;
7631 tree typedef_decl = NULL_TREE;
7632 const char *name = NULL;
7633 tree typedef_type = NULL_TREE;
7634 /* True if this declarator is a function definition. */
7635 bool funcdef_flag = false;
7636 cp_declarator_kind innermost_code = cdk_error;
7639 /* See the code below that used this. */
7640 tree decl_attr = NULL_TREE;
7643 /* Keep track of what sort of function is being processed
7644 so that we can warn about default return values, or explicit
7645 return values which do not match prescribed defaults. */
7646 special_function_kind sfk = sfk_none;
7648 tree dname = NULL_TREE;
7649 tree ctor_return_type = NULL_TREE;
7650 enum overload_flags flags = NO_SPECIAL;
7651 /* cv-qualifiers that apply to the declarator, for a declaration of
7652 a member function. */
7653 cp_cv_quals memfn_quals = TYPE_UNQUALIFIED;
7654 /* cv-qualifiers that apply to the type specified by the DECLSPECS. */
7656 tree raises = NULL_TREE;
7657 int template_count = 0;
7658 tree returned_attrs = NULL_TREE;
7659 tree parms = NULL_TREE;
7660 const cp_declarator *id_declarator;
7661 /* The unqualified name of the declarator; either an
7662 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
7663 tree unqualified_id;
7664 /* The class type, if any, in which this entity is located,
7665 or NULL_TREE if none. Note that this value may be different from
7666 the current class type; for example if an attempt is made to declare
7667 "A::f" inside "B", this value will be "A". */
7668 tree ctype = current_class_type;
7669 /* The NAMESPACE_DECL for the namespace in which this entity is
7670 located. If an unqualified name is used to declare the entity,
7671 this value will be NULL_TREE, even if the entity is located at
7673 tree in_namespace = NULL_TREE;
7674 cp_storage_class storage_class;
7675 bool unsigned_p, signed_p, short_p, long_p, thread_p;
7676 bool type_was_error_mark_node = false;
7677 bool parameter_pack_p = declarator? declarator->parameter_pack_p : false;
7678 bool template_type_arg = false;
7679 bool template_parm_flag = false;
7680 bool constexpr_p = declspecs->specs[(int) ds_constexpr];
7683 signed_p = declspecs->specs[(int)ds_signed];
7684 unsigned_p = declspecs->specs[(int)ds_unsigned];
7685 short_p = declspecs->specs[(int)ds_short];
7686 long_p = declspecs->specs[(int)ds_long];
7687 longlong = declspecs->specs[(int)ds_long] >= 2;
7688 thread_p = declspecs->specs[(int)ds_thread];
7690 if (decl_context == FUNCDEF)
7691 funcdef_flag = true, decl_context = NORMAL;
7692 else if (decl_context == MEMFUNCDEF)
7693 funcdef_flag = true, decl_context = FIELD;
7694 else if (decl_context == BITFIELD)
7695 bitfield = 1, decl_context = FIELD;
7696 else if (decl_context == TEMPLATE_TYPE_ARG)
7697 template_type_arg = true, decl_context = TYPENAME;
7698 else if (decl_context == TPARM)
7699 template_parm_flag = true, decl_context = PARM;
7701 if (initialized > 1)
7702 funcdef_flag = true;
7704 /* Look inside a declarator for the name being declared
7705 and get it as a string, for an error message. */
7706 for (id_declarator = declarator;
7708 id_declarator = id_declarator->declarator)
7710 if (id_declarator->kind != cdk_id)
7711 innermost_code = id_declarator->kind;
7713 switch (id_declarator->kind)
7716 if (id_declarator->declarator
7717 && id_declarator->declarator->kind == cdk_id)
7719 sfk = id_declarator->declarator->u.id.sfk;
7720 if (sfk == sfk_destructor)
7727 tree qualifying_scope = id_declarator->u.id.qualifying_scope;
7728 tree decl = id_declarator->u.id.unqualified_name;
7731 if (qualifying_scope)
7733 if (at_function_scope_p ())
7737 A declarator-id shall not be qualified except
7740 None of the cases are permitted in block
7742 if (qualifying_scope == global_namespace)
7743 error ("invalid use of qualified-name %<::%D%>",
7745 else if (TYPE_P (qualifying_scope))
7746 error ("invalid use of qualified-name %<%T::%D%>",
7747 qualifying_scope, decl);
7749 error ("invalid use of qualified-name %<%D::%D%>",
7750 qualifying_scope, decl);
7751 return error_mark_node;
7753 else if (TYPE_P (qualifying_scope))
7755 ctype = qualifying_scope;
7756 if (innermost_code != cdk_function
7757 && current_class_type
7758 && !UNIQUELY_DERIVED_FROM_P (ctype,
7759 current_class_type))
7761 error ("type %qT is not derived from type %qT",
7762 ctype, current_class_type);
7763 return error_mark_node;
7766 else if (TREE_CODE (qualifying_scope) == NAMESPACE_DECL)
7767 in_namespace = qualifying_scope;
7769 switch (TREE_CODE (decl))
7775 if (innermost_code != cdk_function)
7777 error ("declaration of %qD as non-function", decl);
7778 return error_mark_node;
7780 else if (!qualifying_scope
7781 && !(current_class_type && at_class_scope_p ()))
7783 error ("declaration of %qD as non-member", decl);
7784 return error_mark_node;
7787 type = TREE_OPERAND (decl, 0);
7789 type = constructor_name (type);
7790 name = identifier_to_locale (IDENTIFIER_POINTER (type));
7795 case TEMPLATE_ID_EXPR:
7797 tree fns = TREE_OPERAND (decl, 0);
7800 if (TREE_CODE (dname) != IDENTIFIER_NODE)
7802 gcc_assert (is_overloaded_fn (dname));
7803 dname = DECL_NAME (get_first_fn (dname));
7808 case IDENTIFIER_NODE:
7809 if (TREE_CODE (decl) == IDENTIFIER_NODE)
7812 if (C_IS_RESERVED_WORD (dname))
7814 error ("declarator-id missing; using reserved word %qD",
7816 name = identifier_to_locale (IDENTIFIER_POINTER (dname));
7818 else if (!IDENTIFIER_TYPENAME_P (dname))
7819 name = identifier_to_locale (IDENTIFIER_POINTER (dname));
7822 gcc_assert (flags == NO_SPECIAL);
7823 flags = TYPENAME_FLAG;
7824 ctor_return_type = TREE_TYPE (dname);
7825 sfk = sfk_conversion;
7826 if (is_typename_at_global_scope (dname))
7827 name = identifier_to_locale (IDENTIFIER_POINTER (dname));
7829 name = "<invalid operator>";
7846 return error_mark_node;
7851 if (id_declarator->kind == cdk_id)
7857 The declarator in a function-definition shall have the form
7858 D1 ( parameter-declaration-clause) ... */
7859 if (funcdef_flag && innermost_code != cdk_function)
7861 error ("function definition does not declare parameters");
7862 return error_mark_node;
7865 if (((dname && IDENTIFIER_OPNAME_P (dname)) || flags == TYPENAME_FLAG)
7866 && innermost_code != cdk_function
7867 && ! (ctype && !declspecs->any_specifiers_p))
7869 error ("declaration of %qD as non-function", dname);
7870 return error_mark_node;
7873 /* Anything declared one level down from the top level
7874 must be one of the parameters of a function
7875 (because the body is at least two levels down). */
7877 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
7878 by not allowing C++ class definitions to specify their parameters
7879 with xdecls (must be spec.d in the parmlist).
7881 Since we now wait to push a class scope until we are sure that
7882 we are in a legitimate method context, we must set oldcname
7883 explicitly (since current_class_name is not yet alive).
7885 We also want to avoid calling this a PARM if it is in a namespace. */
7887 if (decl_context == NORMAL && !toplevel_bindings_p ())
7889 struct cp_binding_level *b = current_binding_level;
7890 current_binding_level = b->level_chain;
7891 if (current_binding_level != 0 && toplevel_bindings_p ())
7892 decl_context = PARM;
7893 current_binding_level = b;
7897 name = decl_context == PARM ? "parameter" : "type name";
7899 /* If there were multiple types specified in the decl-specifier-seq,
7900 issue an error message. */
7901 if (declspecs->multiple_types_p)
7903 error ("two or more data types in declaration of %qs", name);
7904 return error_mark_node;
7907 if (declspecs->conflicting_specifiers_p)
7909 error ("conflicting specifiers in declaration of %qs", name);
7910 return error_mark_node;
7913 /* Extract the basic type from the decl-specifier-seq. */
7914 type = declspecs->type;
7915 if (type == error_mark_node)
7918 type_was_error_mark_node = true;
7920 /* If the entire declaration is itself tagged as deprecated then
7921 suppress reports of deprecated items. */
7922 if (type && TREE_DEPRECATED (type)
7923 && deprecated_state != DEPRECATED_SUPPRESS)
7924 warn_deprecated_use (type, NULL_TREE);
7925 if (type && TREE_CODE (type) == TYPE_DECL)
7927 typedef_decl = type;
7928 type = TREE_TYPE (typedef_decl);
7929 if (TREE_DEPRECATED (type)
7930 && DECL_ARTIFICIAL (typedef_decl)
7931 && deprecated_state != DEPRECATED_SUPPRESS)
7932 warn_deprecated_use (type, NULL_TREE);
7934 /* No type at all: default to `int', and set DEFAULTED_INT
7935 because it was not a user-defined typedef. */
7936 if (type == NULL_TREE && (signed_p || unsigned_p || long_p || short_p))
7938 /* These imply 'int'. */
7939 type = integer_type_node;
7943 explicit_int = declspecs->explicit_int_p;
7944 explicit_char = declspecs->explicit_char_p;
7947 /* See the code below that used this. */
7949 decl_attr = DECL_ATTRIBUTES (typedef_decl);
7951 typedef_type = type;
7954 if (sfk != sfk_conversion)
7955 ctor_return_type = ctype;
7957 if (sfk != sfk_none)
7958 type = check_special_function_return_type (sfk, type,
7960 else if (type == NULL_TREE)
7966 /* We handle `main' specially here, because 'main () { }' is so
7967 common. With no options, it is allowed. With -Wreturn-type,
7968 it is a warning. It is only an error with -pedantic-errors. */
7969 is_main = (funcdef_flag
7970 && dname && MAIN_NAME_P (dname)
7971 && ctype == NULL_TREE
7972 && in_namespace == NULL_TREE
7973 && current_namespace == global_namespace);
7975 if (type_was_error_mark_node)
7976 /* We've already issued an error, don't complain more. */;
7977 else if (in_system_header || flag_ms_extensions)
7978 /* Allow it, sigh. */;
7980 permerror (input_location, "ISO C++ forbids declaration of %qs with no type", name);
7982 pedwarn (input_location, OPT_pedantic,
7983 "ISO C++ forbids declaration of %qs with no type", name);
7985 warning (OPT_Wreturn_type,
7986 "ISO C++ forbids declaration of %qs with no type", name);
7988 type = integer_type_node;
7993 /* Now process the modifiers that were specified
7994 and check for invalid combinations. */
7996 /* Long double is a special combination. */
7997 if (long_p && !longlong && TYPE_MAIN_VARIANT (type) == double_type_node)
8000 type = build_qualified_type (long_double_type_node,
8001 cp_type_quals (type));
8004 /* Check all other uses of type modifiers. */
8006 if (unsigned_p || signed_p || long_p || short_p)
8010 if ((signed_p || unsigned_p) && TREE_CODE (type) != INTEGER_TYPE)
8011 error ("%<signed%> or %<unsigned%> invalid for %qs", name);
8012 else if (signed_p && unsigned_p)
8013 error ("%<signed%> and %<unsigned%> specified together for %qs", name);
8014 else if (longlong && TREE_CODE (type) != INTEGER_TYPE)
8015 error ("%<long long%> invalid for %qs", name);
8016 else if (long_p && TREE_CODE (type) == REAL_TYPE)
8017 error ("%<long%> invalid for %qs", name);
8018 else if (short_p && TREE_CODE (type) == REAL_TYPE)
8019 error ("%<short%> invalid for %qs", name);
8020 else if ((long_p || short_p) && TREE_CODE (type) != INTEGER_TYPE)
8021 error ("%<long%> or %<short%> invalid for %qs", name);
8022 else if ((long_p || short_p) && explicit_char)
8023 error ("%<long%> or %<short%> specified with char for %qs", name);
8024 else if (long_p && short_p)
8025 error ("%<long%> and %<short%> specified together for %qs", name);
8026 else if (type == char16_type_node || type == char32_type_node)
8028 if (signed_p || unsigned_p)
8029 error ("%<signed%> or %<unsigned%> invalid for %qs", name);
8030 else if (short_p || long_p)
8031 error ("%<short%> or %<long%> invalid for %qs", name);
8036 if (!explicit_int && !defaulted_int && !explicit_char && pedantic)
8038 pedwarn (input_location, OPT_pedantic,
8039 "long, short, signed or unsigned used invalidly for %qs",
8041 if (flag_pedantic_errors)
8046 /* Discard the type modifiers if they are invalid. */
8057 /* Decide whether an integer type is signed or not.
8058 Optionally treat bitfields as signed by default. */
8062 It is implementation-defined whether a plain (neither
8063 explicitly signed or unsigned) char, short, int, or long
8064 bit-field is signed or unsigned.
8066 Naturally, we extend this to long long as well. Note that
8067 this does not include wchar_t. */
8068 || (bitfield && !flag_signed_bitfields
8070 /* A typedef for plain `int' without `signed' can be
8071 controlled just like plain `int', but a typedef for
8072 `signed int' cannot be so controlled. */
8074 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl))
8075 && TREE_CODE (type) == INTEGER_TYPE
8076 && !same_type_p (TYPE_MAIN_VARIANT (type), wchar_type_node)))
8079 type = long_long_unsigned_type_node;
8081 type = long_unsigned_type_node;
8083 type = short_unsigned_type_node;
8084 else if (type == char_type_node)
8085 type = unsigned_char_type_node;
8086 else if (typedef_decl)
8087 type = unsigned_type_for (type);
8089 type = unsigned_type_node;
8091 else if (signed_p && type == char_type_node)
8092 type = signed_char_type_node;
8094 type = long_long_integer_type_node;
8096 type = long_integer_type_node;
8098 type = short_integer_type_node;
8100 if (declspecs->specs[(int)ds_complex])
8102 if (TREE_CODE (type) != INTEGER_TYPE && TREE_CODE (type) != REAL_TYPE)
8103 error ("complex invalid for %qs", name);
8104 /* If we just have "complex", it is equivalent to
8105 "complex double", but if any modifiers at all are specified it is
8106 the complex form of TYPE. E.g, "complex short" is
8107 "complex short int". */
8109 else if (defaulted_int && ! longlong
8110 && ! (long_p || short_p || signed_p || unsigned_p))
8111 type = complex_double_type_node;
8112 else if (type == integer_type_node)
8113 type = complex_integer_type_node;
8114 else if (type == float_type_node)
8115 type = complex_float_type_node;
8116 else if (type == double_type_node)
8117 type = complex_double_type_node;
8118 else if (type == long_double_type_node)
8119 type = complex_long_double_type_node;
8121 type = build_complex_type (type);
8124 type_quals = TYPE_UNQUALIFIED;
8125 if (declspecs->specs[(int)ds_const])
8126 type_quals |= TYPE_QUAL_CONST;
8127 /* A `constexpr' specifier used in an object declaration declares
8128 the object as `const'. */
8131 if (innermost_code == cdk_function)
8133 else if (declspecs->specs[(int)ds_const] != 0)
8134 error ("both %<const%> and %<constexpr%> cannot be used here");
8136 type_quals |= TYPE_QUAL_CONST;
8138 if (declspecs->specs[(int)ds_volatile])
8139 type_quals |= TYPE_QUAL_VOLATILE;
8140 if (declspecs->specs[(int)ds_restrict])
8141 type_quals |= TYPE_QUAL_RESTRICT;
8142 if (sfk == sfk_conversion && type_quals != TYPE_UNQUALIFIED)
8143 error ("qualifiers are not allowed on declaration of %<operator %T%>",
8146 if (TREE_CODE (type) == FUNCTION_TYPE
8147 && type_quals != TYPE_UNQUALIFIED)
8149 /* This was an error in C++98 (cv-qualifiers cannot be added to
8150 a function type), but DR 295 makes the code well-formed by
8151 dropping the extra qualifiers. */
8152 if (pedantic && cxx_dialect == cxx98)
8154 tree bad_type = build_qualified_type (type, type_quals);
8155 pedwarn (input_location, OPT_pedantic,
8156 "ignoring %qV qualifiers added to function type %qT",
8159 type_quals = TYPE_UNQUALIFIED;
8161 type_quals |= cp_type_quals (type);
8162 type = cp_build_qualified_type_real
8163 (type, type_quals, ((typedef_decl && !DECL_ARTIFICIAL (typedef_decl)
8164 ? tf_ignore_bad_quals : 0) | tf_warning_or_error));
8165 /* We might have ignored or rejected some of the qualifiers. */
8166 type_quals = cp_type_quals (type);
8169 inlinep = !! declspecs->specs[(int)ds_inline];
8170 virtualp = !! declspecs->specs[(int)ds_virtual];
8171 explicitp = !! declspecs->specs[(int)ds_explicit];
8173 storage_class = declspecs->storage_class;
8174 if (storage_class == sc_static)
8175 staticp = 1 + (decl_context == FIELD);
8177 if (virtualp && staticp == 2)
8179 error ("member %qD cannot be declared both virtual and static", dname);
8180 storage_class = sc_none;
8183 friendp = !! declspecs->specs[(int)ds_friend];
8185 if (dependent_name && !friendp)
8187 error ("%<%T::%D%> is not a valid declarator", ctype, dependent_name);
8188 return error_mark_node;
8191 /* Issue errors about use of storage classes for parameters. */
8192 if (decl_context == PARM)
8194 if (declspecs->specs[(int)ds_typedef])
8196 error ("typedef declaration invalid in parameter declaration");
8197 return error_mark_node;
8199 else if (template_parm_flag && storage_class != sc_none)
8201 error ("storage class specified for template parameter %qs", name);
8202 return error_mark_node;
8204 else if (storage_class == sc_static
8205 || storage_class == sc_extern
8207 error ("storage class specifiers invalid in parameter declarations");
8209 if (type_uses_auto (type))
8211 error ("parameter declared %<auto%>");
8212 type = error_mark_node;
8215 /* Function parameters cannot be constexpr. If we saw one, moan
8216 and pretend it wasn't there. */
8219 error ("a parameter cannot be declared %<constexpr%>");
8224 /* Give error if `virtual' is used outside of class declaration. */
8226 && (current_class_name == NULL_TREE || decl_context != FIELD))
8228 error ("%<virtual%> outside class declaration");
8232 /* Static anonymous unions are dealt with here. */
8233 if (staticp && decl_context == TYPENAME
8235 && ANON_AGGR_TYPE_P (declspecs->type))
8236 decl_context = FIELD;
8238 /* Warn about storage classes that are invalid for certain
8239 kinds of declarations (parameters, typenames, etc.). */
8242 && storage_class != sc_extern
8243 && storage_class != sc_static)
8244 || declspecs->specs[(int)ds_typedef]))
8246 error ("multiple storage classes in declaration of %qs", name);
8249 if (decl_context != NORMAL
8250 && ((storage_class != sc_none
8251 && storage_class != sc_mutable)
8254 if ((decl_context == PARM || decl_context == CATCHPARM)
8255 && (storage_class == sc_register
8256 || storage_class == sc_auto))
8258 else if (declspecs->specs[(int)ds_typedef])
8260 else if (decl_context == FIELD
8261 /* C++ allows static class elements. */
8262 && storage_class == sc_static)
8263 /* C++ also allows inlines and signed and unsigned elements,
8264 but in those cases we don't come in here. */
8268 if (decl_context == FIELD)
8269 error ("storage class specified for %qs", name);
8272 if (decl_context == PARM || decl_context == CATCHPARM)
8273 error ("storage class specified for parameter %qs", name);
8275 error ("storage class specified for typename");
8277 if (storage_class == sc_register
8278 || storage_class == sc_auto
8279 || storage_class == sc_extern
8281 storage_class = sc_none;
8284 else if (storage_class == sc_extern && funcdef_flag
8285 && ! toplevel_bindings_p ())
8286 error ("nested function %qs declared %<extern%>", name);
8287 else if (toplevel_bindings_p ())
8289 if (storage_class == sc_auto)
8290 error ("top-level declaration of %qs specifies %<auto%>", name);
8293 && storage_class != sc_extern
8294 && storage_class != sc_static)
8296 error ("function-scope %qs implicitly auto and declared %<__thread%>",
8301 if (storage_class && friendp)
8303 error ("storage class specifiers invalid in friend function declarations");
8304 storage_class = sc_none;
8309 unqualified_id = NULL_TREE;
8312 unqualified_id = id_declarator->u.id.unqualified_name;
8313 switch (TREE_CODE (unqualified_id))
8316 unqualified_id = TREE_OPERAND (unqualified_id, 0);
8317 if (TYPE_P (unqualified_id))
8318 unqualified_id = constructor_name (unqualified_id);
8321 case IDENTIFIER_NODE:
8322 case TEMPLATE_ID_EXPR:
8330 /* Determine the type of the entity declared by recurring on the
8332 for (; declarator; declarator = declarator->declarator)
8334 const cp_declarator *inner_declarator;
8337 if (type == error_mark_node)
8338 return error_mark_node;
8340 attrs = declarator->attributes;
8346 if (declarator == NULL || declarator->kind == cdk_id)
8347 attr_flags |= (int) ATTR_FLAG_DECL_NEXT;
8348 if (declarator->kind == cdk_function)
8349 attr_flags |= (int) ATTR_FLAG_FUNCTION_NEXT;
8350 if (declarator->kind == cdk_array)
8351 attr_flags |= (int) ATTR_FLAG_ARRAY_NEXT;
8352 returned_attrs = decl_attributes (&type,
8353 chainon (returned_attrs, attrs),
8357 if (declarator->kind == cdk_id)
8360 inner_declarator = declarator->declarator;
8362 switch (declarator->kind)
8365 type = create_array_type_for_decl (dname, type,
8366 declarator->u.array.bounds);
8374 /* Declaring a function type.
8375 Make sure we have a valid type for the function to return. */
8377 if (type_quals != TYPE_UNQUALIFIED)
8379 if (SCALAR_TYPE_P (type) || VOID_TYPE_P (type))
8380 warning (OPT_Wignored_qualifiers,
8381 "type qualifiers ignored on function return type");
8382 /* We now know that the TYPE_QUALS don't apply to the
8383 decl, but to its return type. */
8384 type_quals = TYPE_UNQUALIFIED;
8386 errmsg = targetm.invalid_return_type (type);
8390 type = integer_type_node;
8393 /* Error about some types functions can't return. */
8395 if (TREE_CODE (type) == FUNCTION_TYPE)
8397 error ("%qs declared as function returning a function", name);
8398 return error_mark_node;
8400 if (TREE_CODE (type) == ARRAY_TYPE)
8402 error ("%qs declared as function returning an array", name);
8403 return error_mark_node;
8406 /* Pick up type qualifiers which should be applied to `this'. */
8407 memfn_quals = declarator->u.function.qualifiers;
8409 /* Pick up the exception specifications. */
8410 raises = declarator->u.function.exception_specification;
8412 /* Say it's a definition only for the CALL_EXPR
8413 closest to the identifier. */
8414 funcdecl_p = inner_declarator && inner_declarator->kind == cdk_id;
8416 /* Handle a late-specified return type. */
8419 if (type_uses_auto (type))
8421 if (!declarator->u.function.late_return_type)
8423 error ("%qs function uses %<auto%> type specifier without"
8424 " late return type", name);
8425 return error_mark_node;
8427 else if (!is_auto (type))
8429 error ("%qs function with late return type has"
8430 " %qT as its type rather than plain %<auto%>",
8432 return error_mark_node;
8435 else if (declarator->u.function.late_return_type)
8437 error ("%qs function with late return type not declared"
8438 " with %<auto%> type specifier", name);
8439 return error_mark_node;
8442 type = splice_late_return_type
8443 (type, declarator->u.function.late_return_type);
8444 if (type == error_mark_node)
8445 return error_mark_node;
8447 if (ctype == NULL_TREE
8448 && decl_context == FIELD
8450 && (friendp == 0 || dname == current_class_name))
8451 ctype = current_class_type;
8453 if (ctype && (sfk == sfk_constructor
8454 || sfk == sfk_destructor))
8456 /* We are within a class's scope. If our declarator name
8457 is the same as the class name, and we are defining
8458 a function, then it is a constructor/destructor, and
8459 therefore returns a void type. */
8461 /* ISO C++ 12.4/2. A destructor may not be declared
8462 const or volatile. A destructor may not be
8465 ISO C++ 12.1. A constructor may not be declared
8466 const or volatile. A constructor may not be
8467 virtual. A constructor may not be static. */
8469 error ((flags == DTOR_FLAG)
8470 ? "destructor cannot be static member function"
8471 : "constructor cannot be static member function");
8474 error ((flags == DTOR_FLAG)
8475 ? "destructors may not be cv-qualified"
8476 : "constructors may not be cv-qualified");
8477 memfn_quals = TYPE_UNQUALIFIED;
8480 if (decl_context == FIELD
8481 && !member_function_or_else (ctype,
8484 return error_mark_node;
8486 if (flags != DTOR_FLAG)
8488 /* It's a constructor. */
8493 permerror (input_location, "constructors cannot be declared virtual");
8496 if (decl_context == FIELD
8497 && sfk != sfk_constructor)
8498 return error_mark_node;
8500 if (decl_context == FIELD)
8506 error ("can't initialize friend function %qs", name);
8509 /* Cannot be both friend and virtual. */
8510 error ("virtual functions cannot be friends");
8513 if (decl_context == NORMAL)
8514 error ("friend declaration not in class definition");
8515 if (current_function_decl && funcdef_flag)
8516 error ("can't define friend function %qs in a local "
8520 else if (ctype && sfk == sfk_conversion)
8524 maybe_warn_cpp0x (CPP0X_EXPLICIT_CONVERSION);
8529 /* It is not allowed to use `constexpr' in a function
8530 declaration that is not a definition.
8531 That is too strict, though. */
8532 if (constexpr_p && !funcdef_flag)
8534 error ("the %<constexpr%> specifier cannot be used in "
8535 "a function declaration that is not a definition");
8536 constexpr_p = false;
8539 /* A constexpr non-static member function is implicitly const. */
8540 if (constexpr_p && decl_context == FIELD && staticp == 0
8541 && sfk != sfk_constructor && sfk != sfk_destructor)
8542 memfn_quals |= TYPE_QUAL_CONST;
8544 arg_types = grokparms (declarator->u.function.parameters,
8547 if (inner_declarator
8548 && inner_declarator->kind == cdk_id
8549 && inner_declarator->u.id.sfk == sfk_destructor
8550 && arg_types != void_list_node)
8552 error ("destructors may not have parameters");
8553 arg_types = void_list_node;
8557 type = build_function_type (type, arg_types);
8564 /* Filter out pointers-to-references and references-to-references.
8565 We can get these if a TYPE_DECL is used. */
8567 if (TREE_CODE (type) == REFERENCE_TYPE)
8569 if (declarator->kind != cdk_reference)
8571 error ("cannot declare pointer to %q#T", type);
8572 type = TREE_TYPE (type);
8575 /* In C++0x, we allow reference to reference declarations
8576 that occur indirectly through typedefs [7.1.3/8 dcl.typedef]
8577 and template type arguments [14.3.1/4 temp.arg.type]. The
8578 check for direct reference to reference declarations, which
8579 are still forbidden, occurs below. Reasoning behind the change
8580 can be found in DR106, DR540, and the rvalue reference
8582 else if (cxx_dialect == cxx98)
8584 error ("cannot declare reference to %q#T", type);
8585 type = TREE_TYPE (type);
8588 else if (VOID_TYPE_P (type))
8590 if (declarator->kind == cdk_reference)
8591 error ("cannot declare reference to %q#T", type);
8592 else if (declarator->kind == cdk_ptrmem)
8593 error ("cannot declare pointer to %q#T member", type);
8596 /* We now know that the TYPE_QUALS don't apply to the decl,
8597 but to the target of the pointer. */
8598 type_quals = TYPE_UNQUALIFIED;
8600 if (declarator->kind == cdk_ptrmem
8601 && (TREE_CODE (type) == FUNCTION_TYPE
8602 || (memfn_quals && TREE_CODE (type) == METHOD_TYPE)))
8604 memfn_quals |= cp_type_quals (type);
8605 type = build_memfn_type (type,
8606 declarator->u.pointer.class_type,
8608 memfn_quals = TYPE_UNQUALIFIED;
8611 if (TREE_CODE (type) == FUNCTION_TYPE
8612 && cp_type_quals (type) != TYPE_UNQUALIFIED)
8613 error (declarator->kind == cdk_reference
8614 ? G_("cannot declare reference to qualified function type %qT")
8615 : G_("cannot declare pointer to qualified function type %qT"),
8618 if (declarator->kind == cdk_reference)
8620 /* In C++0x, the type we are creating a reference to might be
8621 a typedef which is itself a reference type. In that case,
8622 we follow the reference collapsing rules in
8623 [7.1.3/8 dcl.typedef] to create the final reference type:
8625 "If a typedef TD names a type that is a reference to a type
8626 T, an attempt to create the type 'lvalue reference to cv TD'
8627 creates the type 'lvalue reference to T,' while an attempt
8628 to create the type "rvalue reference to cv TD' creates the
8631 if (!VOID_TYPE_P (type))
8632 type = cp_build_reference_type
8633 ((TREE_CODE (type) == REFERENCE_TYPE
8634 ? TREE_TYPE (type) : type),
8635 (declarator->u.reference.rvalue_ref
8636 && (TREE_CODE(type) != REFERENCE_TYPE
8637 || TYPE_REF_IS_RVALUE (type))));
8639 /* In C++0x, we need this check for direct reference to
8640 reference declarations, which are forbidden by
8641 [8.3.2/5 dcl.ref]. Reference to reference declarations
8642 are only allowed indirectly through typedefs and template
8643 type arguments. Example:
8645 void foo(int & &); // invalid ref-to-ref decl
8647 typedef int & int_ref;
8648 void foo(int_ref &); // valid ref-to-ref decl
8650 if (inner_declarator && inner_declarator->kind == cdk_reference)
8651 error ("cannot declare reference to %q#T, which is not "
8652 "a typedef or a template type argument", type);
8654 else if (TREE_CODE (type) == METHOD_TYPE)
8655 type = build_ptrmemfunc_type (build_pointer_type (type));
8656 else if (declarator->kind == cdk_ptrmem)
8658 gcc_assert (TREE_CODE (declarator->u.pointer.class_type)
8660 if (declarator->u.pointer.class_type == error_mark_node)
8661 /* We will already have complained. */
8662 type = error_mark_node;
8664 type = build_ptrmem_type (declarator->u.pointer.class_type,
8668 type = build_pointer_type (type);
8670 /* Process a list of type modifier keywords (such as
8671 const or volatile) that were given inside the `*' or `&'. */
8673 if (declarator->u.pointer.qualifiers)
8676 = cp_build_qualified_type (type,
8677 declarator->u.pointer.qualifiers);
8678 type_quals = cp_type_quals (type);
8691 if (unqualified_id && TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR
8692 && TREE_CODE (type) != FUNCTION_TYPE
8693 && TREE_CODE (type) != METHOD_TYPE)
8695 error ("template-id %qD used as a declarator",
8697 unqualified_id = dname;
8700 /* If TYPE is a FUNCTION_TYPE, but the function name was explicitly
8701 qualified with a class-name, turn it into a METHOD_TYPE, unless
8702 we know that the function is static. We take advantage of this
8703 opportunity to do other processing that pertains to entities
8704 explicitly declared to be class members. Note that if DECLARATOR
8705 is non-NULL, we know it is a cdk_id declarator; otherwise, we
8706 would not have exited the loop above. */
8708 && declarator->u.id.qualifying_scope
8709 && TYPE_P (declarator->u.id.qualifying_scope))
8713 ctype = declarator->u.id.qualifying_scope;
8714 ctype = TYPE_MAIN_VARIANT (ctype);
8716 while (t != NULL_TREE && CLASS_TYPE_P (t))
8718 /* You're supposed to have one `template <...>' for every
8719 template class, but you don't need one for a full
8720 specialization. For example:
8722 template <class T> struct S{};
8723 template <> struct S<int> { void f(); };
8724 void S<int>::f () {}
8726 is correct; there shouldn't be a `template <>' for the
8727 definition of `S<int>::f'. */
8728 if (CLASSTYPE_TEMPLATE_SPECIALIZATION (t)
8729 && !any_dependent_template_arguments_p (CLASSTYPE_TI_ARGS (t)))
8730 /* T is an explicit (not partial) specialization. All
8731 containing classes must therefore also be explicitly
8734 if ((CLASSTYPE_USE_TEMPLATE (t) || CLASSTYPE_IS_TEMPLATE (t))
8735 && PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (t)))
8736 template_count += 1;
8738 t = TYPE_MAIN_DECL (t);
8739 t = DECL_CONTEXT (t);
8742 if (ctype == current_class_type)
8746 permerror (input_location, "member functions are implicitly friends of their class");
8750 permerror (declarator->id_loc,
8751 "extra qualification %<%T::%> on member %qs",
8754 else if (/* If the qualifying type is already complete, then we
8755 can skip the following checks. */
8756 !COMPLETE_TYPE_P (ctype)
8757 && (/* If the function is being defined, then
8758 qualifying type must certainly be complete. */
8760 /* A friend declaration of "T::f" is OK, even if
8761 "T" is a template parameter. But, if this
8762 function is not a friend, the qualifying type
8764 || (!friendp && !CLASS_TYPE_P (ctype))
8765 /* For a declaration, the type need not be
8766 complete, if either it is dependent (since there
8767 is no meaningful definition of complete in that
8768 case) or the qualifying class is currently being
8770 || !(dependent_type_p (ctype)
8771 || currently_open_class (ctype)))
8772 /* Check that the qualifying type is complete. */
8773 && !complete_type_or_else (ctype, NULL_TREE))
8774 return error_mark_node;
8775 else if (TREE_CODE (type) == FUNCTION_TYPE)
8777 tree sname = declarator->u.id.unqualified_name;
8779 if (current_class_type
8780 && (!friendp || funcdef_flag))
8783 ? "cannot define member function %<%T::%s%> within %<%T%>"
8784 : "cannot declare member function %<%T::%s%> within %<%T%>",
8785 ctype, name, current_class_type);
8786 return error_mark_node;
8789 /* It is not permitted to define a member function outside ist
8790 membership class as `constexpr'. */
8792 error ("a constexpr function cannot be defined "
8793 "outside of its class");
8795 if (TREE_CODE (sname) == IDENTIFIER_NODE
8796 && NEW_DELETE_OPNAME_P (sname))
8797 /* Overloaded operator new and operator delete
8798 are always static functions. */
8801 type = build_memfn_type (type, ctype, memfn_quals);
8803 else if (declspecs->specs[(int)ds_typedef]
8804 && current_class_type)
8806 error ("cannot declare member %<%T::%s%> within %qT",
8807 ctype, name, current_class_type);
8808 return error_mark_node;
8812 /* Now TYPE has the actual type. */
8817 *attrlist = chainon (returned_attrs, *attrlist);
8819 attrlist = &returned_attrs;
8822 /* Handle parameter packs. */
8823 if (parameter_pack_p)
8825 if (decl_context == PARM)
8826 /* Turn the type into a pack expansion.*/
8827 type = make_pack_expansion (type);
8829 error ("non-parameter %qs cannot be a parameter pack", name);
8832 /* Did array size calculations overflow? */
8834 if (TREE_CODE (type) == ARRAY_TYPE
8835 && COMPLETE_TYPE_P (type)
8836 && TREE_CODE (TYPE_SIZE_UNIT (type)) == INTEGER_CST
8837 && TREE_OVERFLOW (TYPE_SIZE_UNIT (type)))
8839 error ("size of array %qs is too large", name);
8840 /* If we proceed with the array type as it is, we'll eventually
8841 crash in tree_low_cst(). */
8842 type = error_mark_node;
8845 if ((decl_context == FIELD || decl_context == PARM)
8846 && !processing_template_decl
8847 && variably_modified_type_p (type, NULL_TREE))
8849 if (decl_context == FIELD)
8850 error ("data member may not have variably modified type %qT", type);
8852 error ("parameter may not have variably modified type %qT", type);
8853 type = error_mark_node;
8856 if (explicitp == 1 || (explicitp && friendp))
8858 /* [dcl.fct.spec] The explicit specifier shall only be used in
8859 declarations of constructors within a class definition. */
8860 error ("only declarations of constructors can be %<explicit%>");
8864 if (storage_class == sc_mutable)
8866 if (decl_context != FIELD || friendp)
8868 error ("non-member %qs cannot be declared %<mutable%>", name);
8869 storage_class = sc_none;
8871 else if (decl_context == TYPENAME || declspecs->specs[(int)ds_typedef])
8873 error ("non-object member %qs cannot be declared %<mutable%>", name);
8874 storage_class = sc_none;
8876 else if (TREE_CODE (type) == FUNCTION_TYPE
8877 || TREE_CODE (type) == METHOD_TYPE)
8879 error ("function %qs cannot be declared %<mutable%>", name);
8880 storage_class = sc_none;
8884 error ("static %qs cannot be declared %<mutable%>", name);
8885 storage_class = sc_none;
8887 else if (type_quals & TYPE_QUAL_CONST)
8889 error ("const %qs cannot be declared %<mutable%>", name);
8890 storage_class = sc_none;
8894 /* If this is declaring a typedef name, return a TYPE_DECL. */
8895 if (declspecs->specs[(int)ds_typedef] && decl_context != TYPENAME)
8899 /* Note that the grammar rejects storage classes
8900 in typenames, fields or parameters. */
8901 if (current_lang_name == lang_name_java)
8902 TYPE_FOR_JAVA (type) = 1;
8904 /* This declaration:
8906 typedef void f(int) const;
8908 declares a function type which is not a member of any
8909 particular class, but which is cv-qualified; for
8910 example "f S::*" declares a pointer to a const-qualified
8911 member function of S. We record the cv-qualification in the
8913 if (memfn_quals && TREE_CODE (type) == FUNCTION_TYPE)
8915 type = cp_build_qualified_type (type, memfn_quals);
8917 /* We have now dealt with these qualifiers. */
8918 memfn_quals = TYPE_UNQUALIFIED;
8921 if (decl_context == FIELD)
8922 decl = build_lang_decl (TYPE_DECL, unqualified_id, type);
8924 decl = build_decl (input_location, TYPE_DECL, unqualified_id, type);
8925 if (id_declarator && declarator->u.id.qualifying_scope) {
8926 error_at (DECL_SOURCE_LOCATION (decl),
8927 "typedef name may not be a nested-name-specifier");
8928 TREE_TYPE (decl) = error_mark_node;
8931 if (decl_context != FIELD)
8933 if (!current_function_decl)
8934 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
8935 else if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (current_function_decl)
8936 || (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P
8937 (current_function_decl)))
8938 /* The TYPE_DECL is "abstract" because there will be
8939 clones of this constructor/destructor, and there will
8940 be copies of this TYPE_DECL generated in those
8942 DECL_ABSTRACT (decl) = 1;
8944 else if (constructor_name_p (unqualified_id, current_class_type))
8945 permerror (input_location, "ISO C++ forbids nested type %qD with same name "
8946 "as enclosing class",
8949 /* If the user declares "typedef struct {...} foo" then the
8950 struct will have an anonymous name. Fill that name in now.
8951 Nothing can refer to it, so nothing needs know about the name
8953 if (type != error_mark_node
8956 && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
8957 && TYPE_ANONYMOUS_P (type)
8958 && cp_type_quals (type) == TYPE_UNQUALIFIED)
8962 /* Replace the anonymous name with the real name everywhere. */
8963 for (t = TYPE_MAIN_VARIANT (type); t; t = TYPE_NEXT_VARIANT (t))
8965 if (ANON_AGGRNAME_P (TYPE_IDENTIFIER (t)))
8967 debug_hooks->set_name (t, decl);
8968 TYPE_NAME (t) = decl;
8972 if (TYPE_LANG_SPECIFIC (type))
8973 TYPE_WAS_ANONYMOUS (type) = 1;
8975 /* If this is a typedef within a template class, the nested
8976 type is a (non-primary) template. The name for the
8977 template needs updating as well. */
8978 if (TYPE_LANG_SPECIFIC (type) && CLASSTYPE_TEMPLATE_INFO (type))
8979 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type))
8980 = TYPE_IDENTIFIER (type);
8982 /* Adjust linkage now that we aren't anonymous anymore. */
8983 set_linkage_according_to_type (type, TYPE_MAIN_DECL (type));
8984 determine_visibility (TYPE_MAIN_DECL (type));
8986 /* FIXME remangle member functions; member functions of a
8987 type with external linkage have external linkage. */
8991 || (typedef_decl && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl)))
8992 C_TYPEDEF_EXPLICITLY_SIGNED (decl) = 1;
8994 bad_specifiers (decl, "type", virtualp,
8995 memfn_quals != TYPE_UNQUALIFIED,
8996 inlinep, friendp, raises != NULL_TREE);
9001 /* Detect the case of an array type of unspecified size
9002 which came, as such, direct from a typedef name.
9003 We must copy the type, so that the array's domain can be
9004 individually set by the object's initializer. */
9006 if (type && typedef_type
9007 && TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type)
9008 && TYPE_MAIN_VARIANT (type) == TYPE_MAIN_VARIANT (typedef_type))
9009 type = build_cplus_array_type (TREE_TYPE (type), NULL_TREE);
9011 /* Detect where we're using a typedef of function type to declare a
9012 function. PARMS will not be set, so we must create it now. */
9014 if (type == typedef_type && TREE_CODE (type) == FUNCTION_TYPE)
9016 tree decls = NULL_TREE;
9019 for (args = TYPE_ARG_TYPES (type);
9020 args && args != void_list_node;
9021 args = TREE_CHAIN (args))
9023 tree decl = cp_build_parm_decl (NULL_TREE, TREE_VALUE (args));
9025 TREE_CHAIN (decl) = decls;
9029 parms = nreverse (decls);
9031 if (decl_context != TYPENAME)
9033 /* A cv-qualifier-seq shall only be part of the function type
9034 for a non-static member function. [8.3.5/4 dcl.fct] */
9035 if (cp_type_quals (type) != TYPE_UNQUALIFIED
9036 && (current_class_type == NULL_TREE || staticp) )
9039 ? G_("qualified function types cannot be used to "
9040 "declare static member functions")
9041 : G_("qualified function types cannot be used to "
9042 "declare free functions"));
9043 type = TYPE_MAIN_VARIANT (type);
9046 /* The qualifiers on the function type become the qualifiers on
9047 the non-static member function. */
9048 memfn_quals |= cp_type_quals (type);
9049 type_quals = TYPE_UNQUALIFIED;
9053 /* If this is a type name (such as, in a cast or sizeof),
9054 compute the type and return it now. */
9056 if (decl_context == TYPENAME)
9058 /* Note that the grammar rejects storage classes
9059 in typenames, fields or parameters. */
9060 if (type_quals != TYPE_UNQUALIFIED)
9061 type_quals = TYPE_UNQUALIFIED;
9063 /* Special case: "friend class foo" looks like a TYPENAME context. */
9066 if (type_quals != TYPE_UNQUALIFIED)
9068 error ("type qualifiers specified for friend class declaration");
9069 type_quals = TYPE_UNQUALIFIED;
9073 error ("%<inline%> specified for friend class declaration");
9079 /* Don't allow friend declaration without a class-key. */
9080 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
9081 permerror (input_location, "template parameters cannot be friends");
9082 else if (TREE_CODE (type) == TYPENAME_TYPE)
9083 permerror (input_location, "friend declaration requires class-key, "
9084 "i.e. %<friend class %T::%D%>",
9085 TYPE_CONTEXT (type), TYPENAME_TYPE_FULLNAME (type));
9087 permerror (input_location, "friend declaration requires class-key, "
9088 "i.e. %<friend %#T%>",
9092 /* Only try to do this stuff if we didn't already give up. */
9093 if (type != integer_type_node)
9095 /* A friendly class? */
9096 if (current_class_type)
9097 make_friend_class (current_class_type, TYPE_MAIN_VARIANT (type),
9100 error ("trying to make class %qT a friend of global scope",
9103 type = void_type_node;
9106 else if (memfn_quals)
9108 if (ctype == NULL_TREE
9109 && TREE_CODE (type) == METHOD_TYPE)
9110 ctype = TYPE_METHOD_BASETYPE (type);
9113 type = build_memfn_type (type, ctype, memfn_quals);
9114 /* Core issue #547: need to allow this in template type args. */
9115 else if (template_type_arg && TREE_CODE (type) == FUNCTION_TYPE)
9116 type = cp_build_qualified_type (type, memfn_quals);
9118 error ("invalid qualifiers on non-member function type");
9123 else if (unqualified_id == NULL_TREE && decl_context != PARM
9124 && decl_context != CATCHPARM
9125 && TREE_CODE (type) != UNION_TYPE
9128 error ("abstract declarator %qT used as declaration", type);
9129 return error_mark_node;
9132 /* Only functions may be declared using an operator-function-id. */
9134 && IDENTIFIER_OPNAME_P (unqualified_id)
9135 && TREE_CODE (type) != FUNCTION_TYPE
9136 && TREE_CODE (type) != METHOD_TYPE)
9138 error ("declaration of %qD as non-function", unqualified_id);
9139 return error_mark_node;
9142 /* We don't check parameter types here because we can emit a better
9143 error message later. */
9144 if (decl_context != PARM)
9146 type = check_var_type (unqualified_id, type);
9147 if (type == error_mark_node)
9148 return error_mark_node;
9151 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
9152 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
9154 if (decl_context == PARM || decl_context == CATCHPARM)
9156 if (ctype || in_namespace)
9157 error ("cannot use %<::%> in parameter declaration");
9159 /* A parameter declared as an array of T is really a pointer to T.
9160 One declared as a function is really a pointer to a function.
9161 One declared as a member is really a pointer to member. */
9163 if (TREE_CODE (type) == ARRAY_TYPE)
9165 /* Transfer const-ness of array into that of type pointed to. */
9166 type = build_pointer_type (TREE_TYPE (type));
9167 type_quals = TYPE_UNQUALIFIED;
9169 else if (TREE_CODE (type) == FUNCTION_TYPE)
9170 type = build_pointer_type (type);
9176 if (decl_context == PARM)
9178 decl = cp_build_parm_decl (unqualified_id, type);
9180 bad_specifiers (decl, "parameter", virtualp,
9181 memfn_quals != TYPE_UNQUALIFIED,
9182 inlinep, friendp, raises != NULL_TREE);
9184 else if (decl_context == FIELD)
9186 /* The C99 flexible array extension. */
9187 if (!staticp && TREE_CODE (type) == ARRAY_TYPE
9188 && TYPE_DOMAIN (type) == NULL_TREE)
9190 tree itype = compute_array_index_type (dname, integer_zero_node);
9191 type = build_cplus_array_type (TREE_TYPE (type), itype);
9194 if (type == error_mark_node)
9196 /* Happens when declaring arrays of sizes which
9197 are error_mark_node, for example. */
9200 else if (in_namespace && !friendp)
9202 /* Something like struct S { int N::j; }; */
9203 error ("invalid use of %<::%>");
9204 return error_mark_node;
9206 else if (TREE_CODE (type) == FUNCTION_TYPE)
9209 tree function_context;
9213 if (ctype == NULL_TREE)
9214 ctype = current_class_type;
9216 if (ctype == NULL_TREE)
9218 error ("can't make %qD into a method -- not in a class",
9220 return error_mark_node;
9223 /* ``A union may [ ... ] not [ have ] virtual functions.''
9225 if (virtualp && TREE_CODE (ctype) == UNION_TYPE)
9227 error ("function %qD declared virtual inside a union",
9229 return error_mark_node;
9232 if (NEW_DELETE_OPNAME_P (unqualified_id))
9236 error ("%qD cannot be declared virtual, since it "
9242 else if (staticp < 2)
9243 type = build_memfn_type (type, ctype, memfn_quals);
9246 /* Check that the name used for a destructor makes sense. */
9247 if (sfk == sfk_destructor)
9249 tree uqname = id_declarator->u.id.unqualified_name;
9253 gcc_assert (friendp);
9254 error ("expected qualified name in friend declaration "
9255 "for destructor %qD", uqname);
9256 return error_mark_node;
9259 if (!check_dtor_name (ctype, TREE_OPERAND (uqname, 0)))
9261 error ("declaration of %qD as member of %qT",
9263 return error_mark_node;
9266 error ("a destructor cannot be %<constexpr%>");
9268 else if (sfk == sfk_constructor && friendp)
9270 error ("expected qualified name in friend declaration "
9271 "for constructor %qD",
9272 id_declarator->u.id.unqualified_name);
9273 return error_mark_node;
9276 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
9277 function_context = (ctype != NULL_TREE) ?
9278 decl_function_context (TYPE_MAIN_DECL (ctype)) : NULL_TREE;
9279 publicp = (! friendp || ! staticp)
9280 && function_context == NULL_TREE;
9281 decl = grokfndecl (ctype, type,
9282 TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
9283 ? unqualified_id : dname,
9286 virtualp, flags, memfn_quals, raises,
9287 friendp ? -1 : 0, friendp, publicp,
9288 inlinep || constexpr_p,
9290 funcdef_flag, template_count, in_namespace,
9291 attrlist, declarator->id_loc);
9292 if (decl == NULL_TREE)
9293 return error_mark_node;
9295 /* This clobbers the attrs stored in `decl' from `attrlist'. */
9296 /* The decl and setting of decl_attr is also turned off. */
9297 decl = build_decl_attribute_variant (decl, decl_attr);
9300 /* [class.conv.ctor]
9302 A constructor declared without the function-specifier
9303 explicit that can be called with a single parameter
9304 specifies a conversion from the type of its first
9305 parameter to the type of its class. Such a constructor
9306 is called a converting constructor. */
9308 DECL_NONCONVERTING_P (decl) = 1;
9310 else if (TREE_CODE (type) == METHOD_TYPE)
9312 /* We only get here for friend declarations of
9313 members of other classes. */
9314 /* All method decls are public, so tell grokfndecl to set
9315 TREE_PUBLIC, also. */
9316 decl = grokfndecl (ctype, type,
9317 TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
9318 ? unqualified_id : dname,
9321 virtualp, flags, memfn_quals, raises,
9322 friendp ? -1 : 0, friendp, 1, 0, sfk,
9323 funcdef_flag, template_count, in_namespace,
9325 declarator->id_loc);
9326 if (decl == NULL_TREE)
9327 return error_mark_node;
9329 else if (!staticp && !dependent_type_p (type)
9330 && !COMPLETE_TYPE_P (complete_type (type))
9331 && (TREE_CODE (type) != ARRAY_TYPE || initialized == 0))
9334 error ("field %qD has incomplete type", unqualified_id);
9336 error ("name %qT has incomplete type", type);
9338 /* If we're instantiating a template, tell them which
9339 instantiation made the field's type be incomplete. */
9340 if (current_class_type
9341 && TYPE_NAME (current_class_type)
9342 && IDENTIFIER_TEMPLATE (TYPE_IDENTIFIER (current_class_type))
9344 && declspecs->type == type)
9345 error (" in instantiation of template %qT",
9346 current_class_type);
9348 return error_mark_node;
9354 error ("%qE is neither function nor member function; "
9355 "cannot be declared friend", unqualified_id);
9363 /* Friends are treated specially. */
9364 if (ctype == current_class_type)
9365 ; /* We already issued a permerror. */
9366 else if (decl && DECL_NAME (decl))
9368 if (template_class_depth (current_class_type) == 0)
9370 decl = check_explicit_specialization
9371 (unqualified_id, decl, template_count,
9372 2 * funcdef_flag + 4);
9373 if (decl == error_mark_node)
9374 return error_mark_node;
9377 DECL_DECLARED_CONSTEXPR_P (decl) = constexpr_p;
9378 decl = do_friend (ctype, unqualified_id, decl,
9384 return error_mark_node;
9387 /* Structure field. It may not be a function, except for C++. */
9389 if (decl == NULL_TREE)
9395 /* An attempt is being made to initialize a non-static
9396 member. But, from [class.mem]:
9398 4 A member-declarator can contain a
9399 constant-initializer only if it declares a static
9400 member (_class.static_) of integral or enumeration
9401 type, see _class.static.data_.
9403 This used to be relatively common practice, but
9404 the rest of the compiler does not correctly
9405 handle the initialization unless the member is
9406 static so we make it static below. */
9407 permerror (input_location, "ISO C++ forbids initialization of member %qD",
9409 permerror (input_location, "making %qD static", unqualified_id);
9413 if (uses_template_parms (type))
9414 /* We'll check at instantiation time. */
9416 else if (check_static_variable_definition (unqualified_id,
9418 /* If we just return the declaration, crashes
9419 will sometimes occur. We therefore return
9420 void_type_node, as if this was a friend
9421 declaration, to cause callers to completely
9422 ignore this declaration. */
9423 return error_mark_node;
9428 /* C++ allows static class members. All other work
9429 for this is done by grokfield. */
9430 decl = build_lang_decl (VAR_DECL, unqualified_id, type);
9431 set_linkage_for_static_data_member (decl);
9432 /* Even if there is an in-class initialization, DECL
9433 is considered undefined until an out-of-class
9434 definition is provided. */
9435 DECL_EXTERNAL (decl) = 1;
9438 DECL_TLS_MODEL (decl) = decl_default_tls_model (decl);
9443 error ("non-static data member %qE declared %<constexpr%>",
9445 decl = build_decl (input_location,
9446 FIELD_DECL, unqualified_id, type);
9447 DECL_NONADDRESSABLE_P (decl) = bitfield;
9448 if (bitfield && !unqualified_id)
9449 TREE_NO_WARNING (decl) = 1;
9451 if (storage_class == sc_mutable)
9453 DECL_MUTABLE_P (decl) = 1;
9454 storage_class = sc_none;
9458 bad_specifiers (decl, "field", virtualp,
9459 memfn_quals != TYPE_UNQUALIFIED,
9460 inlinep, friendp, raises != NULL_TREE);
9463 else if (TREE_CODE (type) == FUNCTION_TYPE
9464 || TREE_CODE (type) == METHOD_TYPE)
9469 if (!unqualified_id)
9470 return error_mark_node;
9472 if (TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR)
9473 original_name = dname;
9475 original_name = unqualified_id;
9477 if (storage_class == sc_auto)
9478 error ("storage class %<auto%> invalid for function %qs", name);
9479 else if (storage_class == sc_register)
9480 error ("storage class %<register%> invalid for function %qs", name);
9482 error ("storage class %<__thread%> invalid for function %qs", name);
9484 /* Function declaration not at top level.
9485 Storage classes other than `extern' are not allowed
9486 and `extern' makes no difference. */
9487 if (! toplevel_bindings_p ()
9488 && (storage_class == sc_static
9489 || declspecs->specs[(int)ds_inline])
9492 if (storage_class == sc_static)
9493 pedwarn (input_location, OPT_pedantic,
9494 "%<static%> specified invalid for function %qs "
9495 "declared out of global scope", name);
9497 pedwarn (input_location, OPT_pedantic,
9498 "%<inline%> specifier invalid for function %qs "
9499 "declared out of global scope", name);
9502 if (ctype != NULL_TREE
9503 && TREE_CODE (ctype) != NAMESPACE_DECL && !MAYBE_CLASS_TYPE_P (ctype))
9505 error ("%q#T is not a class or a namespace", ctype);
9509 if (ctype == NULL_TREE)
9513 error ("virtual non-class function %qs", name);
9516 else if (sfk == sfk_constructor
9517 || sfk == sfk_destructor)
9520 ? "%qs defined in a non-class scope"
9521 : "%qs declared in a non-class scope", name);
9525 else if (TREE_CODE (type) == FUNCTION_TYPE && staticp < 2
9526 && !NEW_DELETE_OPNAME_P (original_name))
9527 type = build_method_type_directly (ctype,
9529 TYPE_ARG_TYPES (type));
9531 /* Record presence of `static'. */
9532 publicp = (ctype != NULL_TREE
9533 || storage_class == sc_extern
9534 || storage_class != sc_static);
9536 decl = grokfndecl (ctype, type, original_name, parms, unqualified_id,
9537 virtualp, flags, memfn_quals, raises,
9539 publicp, inlinep || constexpr_p, sfk, funcdef_flag,
9540 template_count, in_namespace, attrlist,
9541 declarator->id_loc);
9542 if (decl == NULL_TREE)
9543 return error_mark_node;
9547 int invalid_static = 0;
9549 /* Don't allow a static member function in a class, and forbid
9550 declaring main to be static. */
9551 if (TREE_CODE (type) == METHOD_TYPE)
9553 permerror (input_location, "cannot declare member function %qD to have "
9554 "static linkage", decl);
9557 else if (current_function_decl)
9559 /* FIXME need arm citation */
9560 error ("cannot declare static function inside another function");
9567 storage_class = sc_none;
9573 /* It's a variable. */
9575 /* An uninitialized decl with `extern' is a reference. */
9576 decl = grokvardecl (type, unqualified_id,
9579 (type_quals & TYPE_QUAL_CONST) != 0,
9580 ctype ? ctype : in_namespace);
9581 bad_specifiers (decl, "variable", virtualp,
9582 memfn_quals != TYPE_UNQUALIFIED,
9583 inlinep, friendp, raises != NULL_TREE);
9587 DECL_CONTEXT (decl) = ctype;
9590 permerror (input_location, "%<static%> may not be used when defining "
9591 "(as opposed to declaring) a static data member");
9593 storage_class = sc_none;
9595 if (storage_class == sc_register && TREE_STATIC (decl))
9597 error ("static member %qD declared %<register%>", decl);
9598 storage_class = sc_none;
9600 if (storage_class == sc_extern && pedantic)
9602 pedwarn (input_location, OPT_pedantic,
9603 "cannot explicitly declare member %q#D to have "
9604 "extern linkage", decl);
9605 storage_class = sc_none;
9610 if (storage_class == sc_extern && initialized && !funcdef_flag)
9612 if (toplevel_bindings_p ())
9614 /* It's common practice (and completely valid) to have a const
9615 be initialized and declared extern. */
9616 if (!(type_quals & TYPE_QUAL_CONST))
9617 warning (0, "%qs initialized and declared %<extern%>", name);
9621 error ("%qs has both %<extern%> and initializer", name);
9622 return error_mark_node;
9626 /* Record `register' declaration for warnings on &
9627 and in case doing stupid register allocation. */
9629 if (storage_class == sc_register)
9630 DECL_REGISTER (decl) = 1;
9631 else if (storage_class == sc_extern)
9632 DECL_THIS_EXTERN (decl) = 1;
9633 else if (storage_class == sc_static)
9634 DECL_THIS_STATIC (decl) = 1;
9636 /* Don't forget constexprness. */
9637 if (VAR_OR_FUNCTION_DECL_P (decl))
9638 DECL_DECLARED_CONSTEXPR_P (decl) = constexpr_p;
9640 /* Record constancy and volatility on the DECL itself . There's
9641 no need to do this when processing a template; we'll do this
9642 for the instantiated declaration based on the type of DECL. */
9643 if (!processing_template_decl)
9644 cp_apply_type_quals_to_decl (type_quals, decl);
9650 /* Subroutine of start_function. Ensure that each of the parameter
9651 types (as listed in PARMS) is complete, as is required for a
9652 function definition. */
9655 require_complete_types_for_parms (tree parms)
9657 for (; parms; parms = TREE_CHAIN (parms))
9659 if (dependent_type_p (TREE_TYPE (parms)))
9661 if (!VOID_TYPE_P (TREE_TYPE (parms))
9662 && complete_type_or_else (TREE_TYPE (parms), parms))
9664 relayout_decl (parms);
9665 DECL_ARG_TYPE (parms) = type_passed_as (TREE_TYPE (parms));
9668 /* grokparms or complete_type_or_else will have already issued
9670 TREE_TYPE (parms) = error_mark_node;
9674 /* Returns nonzero if T is a local variable. */
9677 local_variable_p (const_tree t)
9679 if ((TREE_CODE (t) == VAR_DECL
9680 /* A VAR_DECL with a context that is a _TYPE is a static data
9682 && !TYPE_P (CP_DECL_CONTEXT (t))
9683 /* Any other non-local variable must be at namespace scope. */
9684 && !DECL_NAMESPACE_SCOPE_P (t))
9685 || (TREE_CODE (t) == PARM_DECL))
9691 /* Like local_variable_p, but suitable for use as a tree-walking
9695 local_variable_p_walkfn (tree *tp, int *walk_subtrees,
9696 void *data ATTRIBUTE_UNUSED)
9698 if (local_variable_p (*tp) && !DECL_ARTIFICIAL (*tp))
9700 else if (TYPE_P (*tp))
9707 /* Check that ARG, which is a default-argument expression for a
9708 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
9709 something goes wrong. DECL may also be a _TYPE node, rather than a
9710 DECL, if there is no DECL available. */
9713 check_default_argument (tree decl, tree arg)
9718 if (TREE_CODE (arg) == DEFAULT_ARG)
9719 /* We get a DEFAULT_ARG when looking at an in-class declaration
9720 with a default argument. Ignore the argument for now; we'll
9721 deal with it after the class is complete. */
9730 decl_type = TREE_TYPE (decl);
9732 if (arg == error_mark_node
9733 || decl == error_mark_node
9734 || TREE_TYPE (arg) == error_mark_node
9735 || decl_type == error_mark_node)
9736 /* Something already went wrong. There's no need to check
9738 return error_mark_node;
9740 /* [dcl.fct.default]
9742 A default argument expression is implicitly converted to the
9744 if (!TREE_TYPE (arg)
9745 || !can_convert_arg (decl_type, TREE_TYPE (arg), arg, LOOKUP_NORMAL))
9748 error ("default argument for %q#D has type %qT",
9749 decl, TREE_TYPE (arg));
9751 error ("default argument for parameter of type %qT has type %qT",
9752 decl_type, TREE_TYPE (arg));
9754 return error_mark_node;
9757 /* [dcl.fct.default]
9759 Local variables shall not be used in default argument
9762 The keyword `this' shall not be used in a default argument of a
9764 var = cp_walk_tree_without_duplicates (&arg, local_variable_p_walkfn, NULL);
9767 error ("default argument %qE uses local variable %qD", arg, var);
9768 return error_mark_node;
9775 /* Returns a deprecated type used within TYPE, or NULL_TREE if none. */
9778 type_is_deprecated (tree type)
9780 enum tree_code code;
9781 if (TREE_DEPRECATED (type))
9783 if (TYPE_NAME (type)
9784 && TREE_DEPRECATED (TYPE_NAME (type)))
9787 /* Do warn about using typedefs to a deprecated class. */
9788 if (TAGGED_TYPE_P (type) && type != TYPE_MAIN_VARIANT (type))
9789 return type_is_deprecated (TYPE_MAIN_VARIANT (type));
9791 code = TREE_CODE (type);
9793 if (code == POINTER_TYPE || code == REFERENCE_TYPE
9794 || code == OFFSET_TYPE || code == FUNCTION_TYPE
9795 || code == METHOD_TYPE || code == ARRAY_TYPE)
9796 return type_is_deprecated (TREE_TYPE (type));
9798 if (TYPE_PTRMEMFUNC_P (type))
9799 return type_is_deprecated
9800 (TREE_TYPE (TREE_TYPE (TYPE_PTRMEMFUNC_FN_TYPE (type))));
9805 /* Decode the list of parameter types for a function type.
9806 Given the list of things declared inside the parens,
9807 return a list of types.
9809 If this parameter does not end with an ellipsis, we append
9812 *PARMS is set to the chain of PARM_DECLs created. */
9815 grokparms (tree parmlist, tree *parms)
9817 tree result = NULL_TREE;
9818 tree decls = NULL_TREE;
9822 for (parm = parmlist; parm != NULL_TREE; parm = TREE_CHAIN (parm))
9824 tree type = NULL_TREE;
9825 tree init = TREE_PURPOSE (parm);
9826 tree decl = TREE_VALUE (parm);
9829 if (parm == void_list_node)
9832 if (! decl || TREE_TYPE (decl) == error_mark_node)
9835 type = TREE_TYPE (decl);
9836 if (VOID_TYPE_P (type))
9838 if (same_type_p (type, void_type_node)
9839 && DECL_SELF_REFERENCE_P (type)
9840 && !DECL_NAME (decl) && !result && TREE_CHAIN (parm) == void_list_node)
9841 /* this is a parmlist of `(void)', which is ok. */
9843 cxx_incomplete_type_error (decl, type);
9844 /* It's not a good idea to actually create parameters of
9845 type `void'; other parts of the compiler assume that a
9846 void type terminates the parameter list. */
9847 type = error_mark_node;
9848 TREE_TYPE (decl) = error_mark_node;
9851 if (type != error_mark_node
9852 && TYPE_FOR_JAVA (type)
9853 && MAYBE_CLASS_TYPE_P (type))
9855 error ("parameter %qD has Java class type", decl);
9856 type = error_mark_node;
9857 TREE_TYPE (decl) = error_mark_node;
9861 if (type != error_mark_node
9862 && (errmsg = targetm.invalid_parameter_type (type)))
9865 type = error_mark_node;
9866 TREE_TYPE (decl) = error_mark_node;
9869 if (type != error_mark_node)
9871 if (deprecated_state != DEPRECATED_SUPPRESS)
9873 tree deptype = type_is_deprecated (type);
9875 warn_deprecated_use (deptype, NULL_TREE);
9878 /* Top-level qualifiers on the parameters are
9879 ignored for function types. */
9880 type = cp_build_qualified_type (type, 0);
9881 if (TREE_CODE (type) == METHOD_TYPE)
9883 error ("parameter %qD invalidly declared method type", decl);
9884 type = build_pointer_type (type);
9885 TREE_TYPE (decl) = type;
9887 else if (abstract_virtuals_error (decl, type))
9888 any_error = 1; /* Seems like a good idea. */
9889 else if (POINTER_TYPE_P (type))
9891 /* [dcl.fct]/6, parameter types cannot contain pointers
9892 (references) to arrays of unknown bound. */
9893 tree t = TREE_TYPE (type);
9894 int ptr = TYPE_PTR_P (type);
9900 else if (TREE_CODE (t) != ARRAY_TYPE)
9902 else if (!TYPE_DOMAIN (t))
9906 if (TREE_CODE (t) == ARRAY_TYPE)
9908 ? G_("parameter %qD includes pointer to array of "
9909 "unknown bound %qT")
9910 : G_("parameter %qD includes reference to array of "
9911 "unknown bound %qT"),
9917 else if (init && !processing_template_decl)
9918 init = check_default_argument (decl, init);
9921 if (TREE_CODE (decl) == PARM_DECL
9922 && FUNCTION_PARAMETER_PACK_P (decl)
9923 && TREE_CHAIN (parm)
9924 && TREE_CHAIN (parm) != void_list_node)
9925 error ("parameter packs must be at the end of the parameter list");
9927 TREE_CHAIN (decl) = decls;
9929 result = tree_cons (init, type, result);
9931 decls = nreverse (decls);
9932 result = nreverse (result);
9934 result = chainon (result, void_list_node);
9941 /* D is a constructor or overloaded `operator='.
9943 Let T be the class in which D is declared. Then, this function
9946 -1 if D's is an ill-formed constructor or copy assignment operator
9947 whose first parameter is of type `T'.
9948 0 if D is not a copy constructor or copy assignment
9950 1 if D is a copy constructor or copy assignment operator whose
9951 first parameter is a reference to non-const qualified T.
9952 2 if D is a copy constructor or copy assignment operator whose
9953 first parameter is a reference to const qualified T.
9955 This function can be used as a predicate. Positive values indicate
9956 a copy constructor and nonzero values indicate a copy assignment
9960 copy_fn_p (const_tree d)
9966 gcc_assert (DECL_FUNCTION_MEMBER_P (d));
9968 if (TREE_CODE (d) == TEMPLATE_DECL
9969 || (DECL_TEMPLATE_INFO (d)
9970 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d))))
9971 /* Instantiations of template member functions are never copy
9972 functions. Note that member functions of templated classes are
9973 represented as template functions internally, and we must
9974 accept those as copy functions. */
9977 args = FUNCTION_FIRST_USER_PARMTYPE (d);
9981 arg_type = TREE_VALUE (args);
9982 if (arg_type == error_mark_node)
9985 if (TYPE_MAIN_VARIANT (arg_type) == DECL_CONTEXT (d))
9987 /* Pass by value copy assignment operator. */
9990 else if (TREE_CODE (arg_type) == REFERENCE_TYPE
9991 && !TYPE_REF_IS_RVALUE (arg_type)
9992 && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type)) == DECL_CONTEXT (d))
9994 if (CP_TYPE_CONST_P (TREE_TYPE (arg_type)))
10000 args = TREE_CHAIN (args);
10002 if (args && args != void_list_node && !TREE_PURPOSE (args))
10003 /* There are more non-optional args. */
10009 /* D is a constructor or overloaded `operator='.
10011 Let T be the class in which D is declared. Then, this function
10012 returns true when D is a move constructor or move assignment
10013 operator, false otherwise. */
10016 move_fn_p (const_tree d)
10020 bool result = false;
10022 gcc_assert (DECL_FUNCTION_MEMBER_P (d));
10024 if (cxx_dialect == cxx98)
10025 /* There are no move constructors if we are in C++98 mode. */
10028 if (TREE_CODE (d) == TEMPLATE_DECL
10029 || (DECL_TEMPLATE_INFO (d)
10030 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d))))
10031 /* Instantiations of template member functions are never copy
10032 functions. Note that member functions of templated classes are
10033 represented as template functions internally, and we must
10034 accept those as copy functions. */
10037 args = FUNCTION_FIRST_USER_PARMTYPE (d);
10041 arg_type = TREE_VALUE (args);
10042 if (arg_type == error_mark_node)
10045 if (TREE_CODE (arg_type) == REFERENCE_TYPE
10046 && TYPE_REF_IS_RVALUE (arg_type)
10047 && same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (arg_type)),
10051 args = TREE_CHAIN (args);
10053 if (args && args != void_list_node && !TREE_PURPOSE (args))
10054 /* There are more non-optional args. */
10060 /* Remember any special properties of member function DECL. */
10063 grok_special_member_properties (tree decl)
10067 if (!DECL_NONSTATIC_MEMBER_FUNCTION_P (decl))
10070 class_type = DECL_CONTEXT (decl);
10071 if (DECL_CONSTRUCTOR_P (decl))
10073 int ctor = copy_fn_p (decl);
10075 if (!DECL_ARTIFICIAL (decl))
10076 TYPE_HAS_USER_CONSTRUCTOR (class_type) = 1;
10082 A non-template constructor for class X is a copy
10083 constructor if its first parameter is of type X&, const
10084 X&, volatile X& or const volatile X&, and either there
10085 are no other parameters or else all other parameters have
10086 default arguments. */
10087 TYPE_HAS_INIT_REF (class_type) = 1;
10088 if (user_provided_p (decl))
10089 TYPE_HAS_COMPLEX_INIT_REF (class_type) = 1;
10091 TYPE_HAS_CONST_INIT_REF (class_type) = 1;
10093 else if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl)))
10095 TYPE_HAS_DEFAULT_CONSTRUCTOR (class_type) = 1;
10096 if (user_provided_p (decl))
10097 TYPE_HAS_COMPLEX_DFLT (class_type) = 1;
10099 else if (is_list_ctor (decl))
10100 TYPE_HAS_LIST_CTOR (class_type) = 1;
10102 else if (DECL_OVERLOADED_OPERATOR_P (decl) == NOP_EXPR)
10106 A non-template assignment operator for class X is a copy
10107 assignment operator if its parameter is of type X, X&, const
10108 X&, volatile X& or const volatile X&. */
10110 int assop = copy_fn_p (decl);
10114 TYPE_HAS_ASSIGN_REF (class_type) = 1;
10115 if (user_provided_p (decl))
10116 TYPE_HAS_COMPLEX_ASSIGN_REF (class_type) = 1;
10118 TYPE_HAS_CONST_ASSIGN_REF (class_type) = 1;
10123 /* Check a constructor DECL has the correct form. Complains
10124 if the class has a constructor of the form X(X). */
10127 grok_ctor_properties (const_tree ctype, const_tree decl)
10129 int ctor_parm = copy_fn_p (decl);
10135 A declaration of a constructor for a class X is ill-formed if
10136 its first parameter is of type (optionally cv-qualified) X
10137 and either there are no other parameters or else all other
10138 parameters have default arguments.
10140 We *don't* complain about member template instantiations that
10141 have this form, though; they can occur as we try to decide
10142 what constructor to use during overload resolution. Since
10143 overload resolution will never prefer such a constructor to
10144 the non-template copy constructor (which is either explicitly
10145 or implicitly defined), there's no need to worry about their
10146 existence. Theoretically, they should never even be
10147 instantiated, but that's hard to forestall. */
10148 error ("invalid constructor; you probably meant %<%T (const %T&)%>",
10156 /* An operator with this code is unary, but can also be binary. */
10159 ambi_op_p (enum tree_code code)
10161 return (code == INDIRECT_REF
10162 || code == ADDR_EXPR
10163 || code == UNARY_PLUS_EXPR
10164 || code == NEGATE_EXPR
10165 || code == PREINCREMENT_EXPR
10166 || code == PREDECREMENT_EXPR);
10169 /* An operator with this name can only be unary. */
10172 unary_op_p (enum tree_code code)
10174 return (code == TRUTH_NOT_EXPR
10175 || code == BIT_NOT_EXPR
10176 || code == COMPONENT_REF
10177 || code == TYPE_EXPR);
10180 /* DECL is a declaration for an overloaded operator. If COMPLAIN is true,
10181 errors are issued for invalid declarations. */
10184 grok_op_properties (tree decl, bool complain)
10186 tree argtypes = TYPE_ARG_TYPES (TREE_TYPE (decl));
10188 int methodp = (TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE);
10189 tree name = DECL_NAME (decl);
10190 enum tree_code operator_code;
10195 /* Count the number of arguments and check for ellipsis. */
10196 for (argtype = argtypes, arity = 0;
10197 argtype && argtype != void_list_node;
10198 argtype = TREE_CHAIN (argtype))
10200 ellipsis_p = !argtype;
10202 class_type = DECL_CONTEXT (decl);
10203 if (class_type && !CLASS_TYPE_P (class_type))
10204 class_type = NULL_TREE;
10206 if (DECL_CONV_FN_P (decl))
10207 operator_code = TYPE_EXPR;
10211 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
10212 if (ansi_opname (CODE) == name) \
10214 operator_code = (CODE); \
10217 else if (ansi_assopname (CODE) == name) \
10219 operator_code = (CODE); \
10220 DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
10224 #include "operators.def"
10225 #undef DEF_OPERATOR
10227 gcc_unreachable ();
10230 gcc_assert (operator_code != MAX_TREE_CODES);
10231 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
10234 switch (operator_code)
10237 TYPE_HAS_NEW_OPERATOR (class_type) = 1;
10241 TYPE_GETS_DELETE (class_type) |= 1;
10245 TYPE_HAS_ARRAY_NEW_OPERATOR (class_type) = 1;
10248 case VEC_DELETE_EXPR:
10249 TYPE_GETS_DELETE (class_type) |= 2;
10256 /* [basic.std.dynamic.allocation]/1:
10258 A program is ill-formed if an allocation function is declared
10259 in a namespace scope other than global scope or declared static
10262 The same also holds true for deallocation functions. */
10263 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR
10264 || operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
10266 if (DECL_NAMESPACE_SCOPE_P (decl))
10268 if (CP_DECL_CONTEXT (decl) != global_namespace)
10270 error ("%qD may not be declared within a namespace", decl);
10273 else if (!TREE_PUBLIC (decl))
10275 error ("%qD may not be declared as static", decl);
10281 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR)
10283 TREE_TYPE (decl) = coerce_new_type (TREE_TYPE (decl));
10284 DECL_IS_OPERATOR_NEW (decl) = 1;
10286 else if (operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
10287 TREE_TYPE (decl) = coerce_delete_type (TREE_TYPE (decl));
10290 /* An operator function must either be a non-static member function
10291 or have at least one parameter of a class, a reference to a class,
10292 an enumeration, or a reference to an enumeration. 13.4.0.6 */
10293 if (! methodp || DECL_STATIC_FUNCTION_P (decl))
10295 if (operator_code == TYPE_EXPR
10296 || operator_code == CALL_EXPR
10297 || operator_code == COMPONENT_REF
10298 || operator_code == ARRAY_REF
10299 || operator_code == NOP_EXPR)
10301 if (class_type && LAMBDA_TYPE_P (class_type))
10302 /* Lambdas can have static op() and conv ops. */;
10305 error ("%qD must be a nonstatic member function", decl);
10313 if (DECL_STATIC_FUNCTION_P (decl))
10315 error ("%qD must be either a non-static member "
10316 "function or a non-member function", decl);
10320 for (p = argtypes; p && p != void_list_node; p = TREE_CHAIN (p))
10322 tree arg = non_reference (TREE_VALUE (p));
10323 if (arg == error_mark_node)
10326 /* MAYBE_CLASS_TYPE_P, rather than CLASS_TYPE_P, is used
10327 because these checks are performed even on
10328 template functions. */
10329 if (MAYBE_CLASS_TYPE_P (arg)
10330 || TREE_CODE (arg) == ENUMERAL_TYPE)
10334 if (!p || p == void_list_node)
10337 error ("%qD must have an argument of class or "
10338 "enumerated type", decl);
10344 /* There are no restrictions on the arguments to an overloaded
10346 if (operator_code == CALL_EXPR)
10349 /* Warn about conversion operators that will never be used. */
10350 if (IDENTIFIER_TYPENAME_P (name)
10351 && ! DECL_TEMPLATE_INFO (decl)
10353 /* Warn only declaring the function; there is no need to
10354 warn again about out-of-class definitions. */
10355 && class_type == current_class_type)
10357 tree t = TREE_TYPE (name);
10358 int ref = (TREE_CODE (t) == REFERENCE_TYPE);
10361 t = TYPE_MAIN_VARIANT (TREE_TYPE (t));
10363 if (TREE_CODE (t) == VOID_TYPE)
10364 warning (OPT_Wconversion,
10366 ? G_("conversion to a reference to void "
10367 "will never use a type conversion operator")
10368 : G_("conversion to void "
10369 "will never use a type conversion operator"));
10370 else if (class_type)
10372 if (t == class_type)
10373 warning (OPT_Wconversion,
10375 ? G_("conversion to a reference to the same type "
10376 "will never use a type conversion operator")
10377 : G_("conversion to the same type "
10378 "will never use a type conversion operator"));
10379 /* Don't force t to be complete here. */
10380 else if (MAYBE_CLASS_TYPE_P (t)
10381 && COMPLETE_TYPE_P (t)
10382 && DERIVED_FROM_P (t, class_type))
10383 warning (OPT_Wconversion,
10385 ? G_("conversion to a reference to a base class "
10386 "will never use a type conversion operator")
10387 : G_("conversion to a base class "
10388 "will never use a type conversion operator"));
10393 if (operator_code == COND_EXPR)
10396 error ("ISO C++ prohibits overloading operator ?:");
10399 else if (ellipsis_p)
10401 error ("%qD must not have variable number of arguments", decl);
10404 else if (ambi_op_p (operator_code))
10407 /* We pick the one-argument operator codes by default, so
10408 we don't have to change anything. */
10410 else if (arity == 2)
10412 /* If we thought this was a unary operator, we now know
10413 it to be a binary operator. */
10414 switch (operator_code)
10417 operator_code = MULT_EXPR;
10421 operator_code = BIT_AND_EXPR;
10424 case UNARY_PLUS_EXPR:
10425 operator_code = PLUS_EXPR;
10429 operator_code = MINUS_EXPR;
10432 case PREINCREMENT_EXPR:
10433 operator_code = POSTINCREMENT_EXPR;
10436 case PREDECREMENT_EXPR:
10437 operator_code = POSTDECREMENT_EXPR;
10441 gcc_unreachable ();
10444 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
10446 if ((operator_code == POSTINCREMENT_EXPR
10447 || operator_code == POSTDECREMENT_EXPR)
10448 && ! processing_template_decl
10449 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes)), integer_type_node))
10452 error ("postfix %qD must take %<int%> as its argument",
10455 error ("postfix %qD must take %<int%> as its second "
10463 error ("%qD must take either zero or one argument", decl);
10465 error ("%qD must take either one or two arguments", decl);
10469 /* More Effective C++ rule 6. */
10471 && (operator_code == POSTINCREMENT_EXPR
10472 || operator_code == POSTDECREMENT_EXPR
10473 || operator_code == PREINCREMENT_EXPR
10474 || operator_code == PREDECREMENT_EXPR))
10476 tree arg = TREE_VALUE (argtypes);
10477 tree ret = TREE_TYPE (TREE_TYPE (decl));
10478 if (methodp || TREE_CODE (arg) == REFERENCE_TYPE)
10479 arg = TREE_TYPE (arg);
10480 arg = TYPE_MAIN_VARIANT (arg);
10481 if (operator_code == PREINCREMENT_EXPR
10482 || operator_code == PREDECREMENT_EXPR)
10484 if (TREE_CODE (ret) != REFERENCE_TYPE
10485 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret)),
10487 warning (OPT_Weffc__, "prefix %qD should return %qT", decl,
10488 build_reference_type (arg));
10492 if (!same_type_p (TYPE_MAIN_VARIANT (ret), arg))
10493 warning (OPT_Weffc__, "postfix %qD should return %qT", decl, arg);
10497 else if (unary_op_p (operator_code))
10502 error ("%qD must take %<void%>", decl);
10504 error ("%qD must take exactly one argument", decl);
10508 else /* if (binary_op_p (operator_code)) */
10513 error ("%qD must take exactly one argument", decl);
10515 error ("%qD must take exactly two arguments", decl);
10519 /* More Effective C++ rule 7. */
10521 && (operator_code == TRUTH_ANDIF_EXPR
10522 || operator_code == TRUTH_ORIF_EXPR
10523 || operator_code == COMPOUND_EXPR))
10524 warning (OPT_Weffc__, "user-defined %qD always evaluates both arguments",
10528 /* Effective C++ rule 23. */
10531 && !DECL_ASSIGNMENT_OPERATOR_P (decl)
10532 && (operator_code == PLUS_EXPR
10533 || operator_code == MINUS_EXPR
10534 || operator_code == TRUNC_DIV_EXPR
10535 || operator_code == MULT_EXPR
10536 || operator_code == TRUNC_MOD_EXPR)
10537 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl))) == REFERENCE_TYPE)
10538 warning (OPT_Weffc__, "%qD should return by value", decl);
10540 /* [over.oper]/8 */
10541 for (; argtypes && argtypes != void_list_node;
10542 argtypes = TREE_CHAIN (argtypes))
10543 if (TREE_PURPOSE (argtypes))
10545 TREE_PURPOSE (argtypes) = NULL_TREE;
10546 if (operator_code == POSTINCREMENT_EXPR
10547 || operator_code == POSTDECREMENT_EXPR)
10549 pedwarn (input_location, OPT_pedantic, "%qD cannot have default arguments",
10554 error ("%qD cannot have default arguments", decl);
10562 /* Return a string giving the keyword associate with CODE. */
10564 static const char *
10565 tag_name (enum tag_types code)
10577 case typename_type:
10580 gcc_unreachable ();
10584 /* Name lookup in an elaborated-type-specifier (after the keyword
10585 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
10586 elaborated-type-specifier is invalid, issue a diagnostic and return
10587 error_mark_node; otherwise, return the *_TYPE to which it referred.
10588 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
10591 check_elaborated_type_specifier (enum tag_types tag_code,
10593 bool allow_template_p)
10599 struct S { struct S *p; };
10601 name lookup will find the TYPE_DECL for the implicit "S::S"
10602 typedef. Adjust for that here. */
10603 if (DECL_SELF_REFERENCE_P (decl))
10604 decl = TYPE_NAME (TREE_TYPE (decl));
10606 type = TREE_TYPE (decl);
10608 /* Check TEMPLATE_TYPE_PARM first because DECL_IMPLICIT_TYPEDEF_P
10609 is false for this case as well. */
10610 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
10612 error ("using template type parameter %qT after %qs",
10613 type, tag_name (tag_code));
10614 return error_mark_node;
10618 If the identifier resolves to a typedef-name or a template
10619 type-parameter, the elaborated-type-specifier is ill-formed.
10621 In other words, the only legitimate declaration to use in the
10622 elaborated type specifier is the implicit typedef created when
10623 the type is declared. */
10624 else if (!DECL_IMPLICIT_TYPEDEF_P (decl)
10625 && !DECL_SELF_REFERENCE_P (decl)
10626 && tag_code != typename_type)
10628 error ("using typedef-name %qD after %qs", decl, tag_name (tag_code));
10629 error ("%q+D has a previous declaration here", decl);
10630 return error_mark_node;
10632 else if (TREE_CODE (type) != RECORD_TYPE
10633 && TREE_CODE (type) != UNION_TYPE
10634 && tag_code != enum_type
10635 && tag_code != typename_type)
10637 error ("%qT referred to as %qs", type, tag_name (tag_code));
10638 error ("%q+T has a previous declaration here", type);
10639 return error_mark_node;
10641 else if (TREE_CODE (type) != ENUMERAL_TYPE
10642 && tag_code == enum_type)
10644 error ("%qT referred to as enum", type);
10645 error ("%q+T has a previous declaration here", type);
10646 return error_mark_node;
10648 else if (!allow_template_p
10649 && TREE_CODE (type) == RECORD_TYPE
10650 && CLASSTYPE_IS_TEMPLATE (type))
10652 /* If a class template appears as elaborated type specifier
10653 without a template header such as:
10655 template <class T> class C {};
10656 void f(class C); // No template header here
10658 then the required template argument is missing. */
10659 error ("template argument required for %<%s %T%>",
10660 tag_name (tag_code),
10661 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type)));
10662 return error_mark_node;
10668 /* Lookup NAME in elaborate type specifier in scope according to
10669 SCOPE and issue diagnostics if necessary.
10670 Return *_TYPE node upon success, NULL_TREE when the NAME is not
10671 found, and ERROR_MARK_NODE for type error. */
10674 lookup_and_check_tag (enum tag_types tag_code, tree name,
10675 tag_scope scope, bool template_header_p)
10679 if (scope == ts_global)
10681 /* First try ordinary name lookup, ignoring hidden class name
10682 injected via friend declaration. */
10683 decl = lookup_name_prefer_type (name, 2);
10684 /* If that fails, the name will be placed in the smallest
10685 non-class, non-function-prototype scope according to 3.3.1/5.
10686 We may already have a hidden name declared as friend in this
10687 scope. So lookup again but not ignoring hidden names.
10688 If we find one, that name will be made visible rather than
10689 creating a new tag. */
10691 decl = lookup_type_scope (name, ts_within_enclosing_non_class);
10694 decl = lookup_type_scope (name, scope);
10696 if (decl && DECL_CLASS_TEMPLATE_P (decl))
10697 decl = DECL_TEMPLATE_RESULT (decl);
10699 if (decl && TREE_CODE (decl) == TYPE_DECL)
10701 /* Look for invalid nested type:
10705 if (scope == ts_current && DECL_SELF_REFERENCE_P (decl))
10707 error ("%qD has the same name as the class in which it is "
10710 return error_mark_node;
10713 /* Two cases we need to consider when deciding if a class
10714 template is allowed as an elaborated type specifier:
10715 1. It is a self reference to its own class.
10716 2. It comes with a template header.
10720 template <class T> class C {
10721 class C *c1; // DECL_SELF_REFERENCE_P is true
10724 template <class U> class C; // template_header_p is true
10725 template <class T> class C<T>::D {
10726 class C *c2; // DECL_SELF_REFERENCE_P is true
10729 t = check_elaborated_type_specifier (tag_code,
10732 | DECL_SELF_REFERENCE_P (decl));
10735 else if (decl && TREE_CODE (decl) == TREE_LIST)
10737 error ("reference to %qD is ambiguous", name);
10738 print_candidates (decl);
10739 return error_mark_node;
10745 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
10746 Define the tag as a forward-reference if it is not defined.
10748 If a declaration is given, process it here, and report an error if
10749 multiple declarations are not identical.
10751 SCOPE is TS_CURRENT when this is also a definition. Only look in
10752 the current frame for the name (since C++ allows new names in any
10753 scope.) It is TS_WITHIN_ENCLOSING_NON_CLASS if this is a friend
10754 declaration. Only look beginning from the current scope outward up
10755 till the nearest non-class scope. Otherwise it is TS_GLOBAL.
10757 TEMPLATE_HEADER_P is true when this declaration is preceded by
10758 a set of template parameters. */
10761 xref_tag (enum tag_types tag_code, tree name,
10762 tag_scope scope, bool template_header_p)
10764 enum tree_code code;
10766 tree context = NULL_TREE;
10768 timevar_push (TV_NAME_LOOKUP);
10770 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
10776 code = RECORD_TYPE;
10782 code = ENUMERAL_TYPE;
10785 gcc_unreachable ();
10788 /* In case of anonymous name, xref_tag is only called to
10789 make type node and push name. Name lookup is not required. */
10790 if (ANON_AGGRNAME_P (name))
10793 t = lookup_and_check_tag (tag_code, name,
10794 scope, template_header_p);
10796 if (t == error_mark_node)
10797 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
10799 if (scope != ts_current && t && current_class_type
10800 && template_class_depth (current_class_type)
10801 && template_header_p)
10803 /* Since SCOPE is not TS_CURRENT, we are not looking at a
10804 definition of this tag. Since, in addition, we are currently
10805 processing a (member) template declaration of a template
10806 class, we must be very careful; consider:
10813 { template <class V>
10814 friend struct S1; };
10816 Here, the S2::S1 declaration should not be confused with the
10817 outer declaration. In particular, the inner version should
10818 have a template parameter of level 2, not level 1. This
10819 would be particularly important if the member declaration
10822 template <class V = U> friend struct S1;
10824 say, when we should tsubst into `U' when instantiating
10825 S2. On the other hand, when presented with:
10835 we must find the inner binding eventually. We
10836 accomplish this by making sure that the new type we
10837 create to represent this declaration has the right
10839 context = TYPE_CONTEXT (t);
10845 /* If no such tag is yet defined, create a forward-reference node
10846 and record it as the "definition".
10847 When a real declaration of this type is found,
10848 the forward-reference will be altered into a real type. */
10849 if (code == ENUMERAL_TYPE)
10851 error ("use of enum %q#D without previous declaration", name);
10852 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
10856 t = make_class_type (code);
10857 TYPE_CONTEXT (t) = context;
10858 t = pushtag (name, t, scope);
10863 if (template_header_p && MAYBE_CLASS_TYPE_P (t))
10865 if (!redeclare_class_template (t, current_template_parms))
10866 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
10868 else if (!processing_template_decl
10869 && CLASS_TYPE_P (t)
10870 && CLASSTYPE_IS_TEMPLATE (t))
10872 error ("redeclaration of %qT as a non-template", t);
10873 error ("previous declaration %q+D", t);
10874 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
10877 /* Make injected friend class visible. */
10878 if (scope != ts_within_enclosing_non_class
10879 && hidden_name_p (TYPE_NAME (t)))
10881 DECL_ANTICIPATED (TYPE_NAME (t)) = 0;
10882 DECL_FRIEND_P (TYPE_NAME (t)) = 0;
10884 if (TYPE_TEMPLATE_INFO (t))
10886 DECL_ANTICIPATED (TYPE_TI_TEMPLATE (t)) = 0;
10887 DECL_FRIEND_P (TYPE_TI_TEMPLATE (t)) = 0;
10892 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, t);
10896 xref_tag_from_type (tree old, tree id, tag_scope scope)
10898 enum tag_types tag_kind;
10900 if (TREE_CODE (old) == RECORD_TYPE)
10901 tag_kind = (CLASSTYPE_DECLARED_CLASS (old) ? class_type : record_type);
10903 tag_kind = union_type;
10905 if (id == NULL_TREE)
10906 id = TYPE_IDENTIFIER (old);
10908 return xref_tag (tag_kind, id, scope, false);
10911 /* Create the binfo hierarchy for REF with (possibly NULL) base list
10912 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
10913 access_* node, and the TREE_VALUE is the type of the base-class.
10914 Non-NULL TREE_TYPE indicates virtual inheritance.
10916 Returns true if the binfo hierarchy was successfully created,
10917 false if an error was detected. */
10920 xref_basetypes (tree ref, tree base_list)
10923 tree binfo, base_binfo;
10924 unsigned max_vbases = 0; /* Maximum direct & indirect virtual bases. */
10925 unsigned max_bases = 0; /* Maximum direct bases. */
10927 tree default_access;
10928 tree igo_prev; /* Track Inheritance Graph Order. */
10930 if (ref == error_mark_node)
10933 /* The base of a derived class is private by default, all others are
10935 default_access = (TREE_CODE (ref) == RECORD_TYPE
10936 && CLASSTYPE_DECLARED_CLASS (ref)
10937 ? access_private_node : access_public_node);
10939 /* First, make sure that any templates in base-classes are
10940 instantiated. This ensures that if we call ourselves recursively
10941 we do not get confused about which classes are marked and which
10943 basep = &base_list;
10946 tree basetype = TREE_VALUE (*basep);
10948 if (!(processing_template_decl && uses_template_parms (basetype))
10949 && !complete_type_or_else (basetype, NULL))
10950 /* An incomplete type. Remove it from the list. */
10951 *basep = TREE_CHAIN (*basep);
10955 if (TREE_TYPE (*basep))
10957 if (CLASS_TYPE_P (basetype))
10958 max_vbases += VEC_length (tree, CLASSTYPE_VBASECLASSES (basetype));
10959 basep = &TREE_CHAIN (*basep);
10963 TYPE_MARKED_P (ref) = 1;
10965 /* The binfo slot should be empty, unless this is an (ill-formed)
10967 gcc_assert (!TYPE_BINFO (ref) || TYPE_SIZE (ref));
10968 gcc_assert (TYPE_MAIN_VARIANT (ref) == ref);
10970 binfo = make_tree_binfo (max_bases);
10972 TYPE_BINFO (ref) = binfo;
10973 BINFO_OFFSET (binfo) = size_zero_node;
10974 BINFO_TYPE (binfo) = ref;
10976 /* Apply base-class info set up to the variants of this type. */
10977 fixup_type_variants (ref);
10981 BINFO_BASE_ACCESSES (binfo) = VEC_alloc (tree, gc, max_bases);
10982 /* An aggregate cannot have baseclasses. */
10983 CLASSTYPE_NON_AGGREGATE (ref) = 1;
10985 if (TREE_CODE (ref) == UNION_TYPE)
10987 error ("derived union %qT invalid", ref);
10994 if (TYPE_FOR_JAVA (ref))
10996 error ("Java class %qT cannot have multiple bases", ref);
11003 CLASSTYPE_VBASECLASSES (ref) = VEC_alloc (tree, gc, max_vbases);
11005 if (TYPE_FOR_JAVA (ref))
11007 error ("Java class %qT cannot have virtual bases", ref);
11012 for (igo_prev = binfo; base_list; base_list = TREE_CHAIN (base_list))
11014 tree access = TREE_PURPOSE (base_list);
11015 int via_virtual = TREE_TYPE (base_list) != NULL_TREE;
11016 tree basetype = TREE_VALUE (base_list);
11018 if (access == access_default_node)
11019 access = default_access;
11021 if (PACK_EXPANSION_P (basetype))
11022 basetype = PACK_EXPANSION_PATTERN (basetype);
11023 if (TREE_CODE (basetype) == TYPE_DECL)
11024 basetype = TREE_TYPE (basetype);
11025 if (!MAYBE_CLASS_TYPE_P (basetype) || TREE_CODE (basetype) == UNION_TYPE)
11027 error ("base type %qT fails to be a struct or class type",
11032 if (TYPE_FOR_JAVA (basetype) && (current_lang_depth () == 0))
11033 TYPE_FOR_JAVA (ref) = 1;
11035 base_binfo = NULL_TREE;
11036 if (CLASS_TYPE_P (basetype) && !dependent_type_p (basetype))
11038 base_binfo = TYPE_BINFO (basetype);
11039 /* The original basetype could have been a typedef'd type. */
11040 basetype = BINFO_TYPE (base_binfo);
11042 /* Inherit flags from the base. */
11043 TYPE_HAS_NEW_OPERATOR (ref)
11044 |= TYPE_HAS_NEW_OPERATOR (basetype);
11045 TYPE_HAS_ARRAY_NEW_OPERATOR (ref)
11046 |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype);
11047 TYPE_GETS_DELETE (ref) |= TYPE_GETS_DELETE (basetype);
11048 TYPE_HAS_CONVERSION (ref) |= TYPE_HAS_CONVERSION (basetype);
11049 CLASSTYPE_DIAMOND_SHAPED_P (ref)
11050 |= CLASSTYPE_DIAMOND_SHAPED_P (basetype);
11051 CLASSTYPE_REPEATED_BASE_P (ref)
11052 |= CLASSTYPE_REPEATED_BASE_P (basetype);
11055 /* We must do this test after we've seen through a typedef
11057 if (TYPE_MARKED_P (basetype))
11059 if (basetype == ref)
11060 error ("recursive type %qT undefined", basetype);
11062 error ("duplicate base type %qT invalid", basetype);
11066 if (PACK_EXPANSION_P (TREE_VALUE (base_list)))
11067 /* Regenerate the pack expansion for the bases. */
11068 basetype = make_pack_expansion (basetype);
11070 TYPE_MARKED_P (basetype) = 1;
11072 base_binfo = copy_binfo (base_binfo, basetype, ref,
11073 &igo_prev, via_virtual);
11074 if (!BINFO_INHERITANCE_CHAIN (base_binfo))
11075 BINFO_INHERITANCE_CHAIN (base_binfo) = binfo;
11077 BINFO_BASE_APPEND (binfo, base_binfo);
11078 BINFO_BASE_ACCESS_APPEND (binfo, access);
11081 if (VEC_space (tree, CLASSTYPE_VBASECLASSES (ref), 1))
11082 /* If we have space in the vbase vector, we must have shared at
11083 least one of them, and are therefore diamond shaped. */
11084 CLASSTYPE_DIAMOND_SHAPED_P (ref) = 1;
11086 /* Unmark all the types. */
11087 for (i = 0; BINFO_BASE_ITERATE (binfo, i, base_binfo); i++)
11088 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
11089 TYPE_MARKED_P (ref) = 0;
11091 /* Now see if we have a repeated base type. */
11092 if (!CLASSTYPE_REPEATED_BASE_P (ref))
11094 for (base_binfo = binfo; base_binfo;
11095 base_binfo = TREE_CHAIN (base_binfo))
11097 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
11099 CLASSTYPE_REPEATED_BASE_P (ref) = 1;
11102 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 1;
11104 for (base_binfo = binfo; base_binfo;
11105 base_binfo = TREE_CHAIN (base_binfo))
11106 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
11107 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
11116 /* Begin compiling the definition of an enumeration type.
11119 UNDERLYING_TYPE is the type that will be used as the storage for
11120 the enumeration type. This should be NULL_TREE if no storage type
11123 SCOPED_ENUM_P is true if this is a scoped enumeration type.
11125 Returns the type object, as yet incomplete.
11126 Also records info about it so that build_enumerator
11127 may be used to declare the individual values as they are read. */
11130 start_enum (tree name, tree underlying_type, bool scoped_enum_p)
11134 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
11136 /* If this is the real definition for a previous forward reference,
11137 fill in the contents in the same object that used to be the
11138 forward reference. */
11140 enumtype = lookup_and_check_tag (enum_type, name,
11141 /*tag_scope=*/ts_current,
11142 /*template_header_p=*/false);
11144 if (enumtype != NULL_TREE && TREE_CODE (enumtype) == ENUMERAL_TYPE)
11146 error_at (input_location, "multiple definition of %q#T", enumtype);
11147 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype)),
11148 "previous definition here");
11149 /* Clear out TYPE_VALUES, and start again. */
11150 TYPE_VALUES (enumtype) = NULL_TREE;
11154 /* In case of error, make a dummy enum to allow parsing to
11156 if (enumtype == error_mark_node)
11157 name = make_anon_name ();
11159 enumtype = cxx_make_type (ENUMERAL_TYPE);
11160 enumtype = pushtag (name, enumtype, /*tag_scope=*/ts_current);
11163 if (enumtype == error_mark_node)
11168 SET_SCOPED_ENUM_P (enumtype, 1);
11169 begin_scope (sk_scoped_enum, enumtype);
11171 /* [C++0x dcl.enum]p5:
11173 If not explicitly specified, the underlying type of a scoped
11174 enumeration type is int. */
11175 if (!underlying_type)
11176 underlying_type = integer_type_node;
11179 if (underlying_type)
11181 if (CP_INTEGRAL_TYPE_P (underlying_type))
11183 TYPE_MIN_VALUE (enumtype) = TYPE_MIN_VALUE (underlying_type);
11184 TYPE_MAX_VALUE (enumtype) = TYPE_MAX_VALUE (underlying_type);
11185 TYPE_SIZE (enumtype) = TYPE_SIZE (underlying_type);
11186 TYPE_SIZE_UNIT (enumtype) = TYPE_SIZE_UNIT (underlying_type);
11187 SET_TYPE_MODE (enumtype, TYPE_MODE (underlying_type));
11188 TYPE_PRECISION (enumtype) = TYPE_PRECISION (underlying_type);
11189 TYPE_ALIGN (enumtype) = TYPE_ALIGN (underlying_type);
11190 TYPE_USER_ALIGN (enumtype) = TYPE_USER_ALIGN (underlying_type);
11191 TYPE_UNSIGNED (enumtype) = TYPE_UNSIGNED (underlying_type);
11192 ENUM_UNDERLYING_TYPE (enumtype) = underlying_type;
11194 else if (!dependent_type_p (underlying_type))
11195 error ("underlying type %<%T%> of %<%T%> must be an integral type",
11196 underlying_type, enumtype);
11202 /* After processing and defining all the values of an enumeration type,
11203 install their decls in the enumeration type and finish it off.
11204 ENUMTYPE is the type object and VALUES a list of name-value pairs. */
11207 finish_enum (tree enumtype)
11216 bool use_short_enum;
11221 tree underlying_type = NULL_TREE;
11222 bool fixed_underlying_type_p
11223 = ENUM_UNDERLYING_TYPE (enumtype) != NULL_TREE;
11225 /* We built up the VALUES in reverse order. */
11226 TYPE_VALUES (enumtype) = nreverse (TYPE_VALUES (enumtype));
11228 /* For an enum defined in a template, just set the type of the values;
11229 all further processing is postponed until the template is
11230 instantiated. We need to set the type so that tsubst of a CONST_DECL
11232 if (processing_template_decl)
11234 for (values = TYPE_VALUES (enumtype);
11236 values = TREE_CHAIN (values))
11237 TREE_TYPE (TREE_VALUE (values)) = enumtype;
11238 if (at_function_scope_p ())
11239 add_stmt (build_min (TAG_DEFN, enumtype));
11240 if (SCOPED_ENUM_P (enumtype))
11245 /* Determine the minimum and maximum values of the enumerators. */
11246 if (TYPE_VALUES (enumtype))
11248 minnode = maxnode = NULL_TREE;
11250 for (values = TYPE_VALUES (enumtype);
11252 values = TREE_CHAIN (values))
11254 decl = TREE_VALUE (values);
11256 /* [dcl.enum]: Following the closing brace of an enum-specifier,
11257 each enumerator has the type of its enumeration. Prior to the
11258 closing brace, the type of each enumerator is the type of its
11259 initializing value. */
11260 TREE_TYPE (decl) = enumtype;
11262 /* Update the minimum and maximum values, if appropriate. */
11263 value = DECL_INITIAL (decl);
11264 if (value == error_mark_node)
11265 value = integer_zero_node;
11266 /* Figure out what the minimum and maximum values of the
11267 enumerators are. */
11269 minnode = maxnode = value;
11270 else if (tree_int_cst_lt (maxnode, value))
11272 else if (tree_int_cst_lt (value, minnode))
11279 If the enumerator-list is empty, the underlying type is as if
11280 the enumeration had a single enumerator with value 0. */
11281 minnode = maxnode = integer_zero_node;
11283 /* Compute the number of bits require to represent all values of the
11284 enumeration. We must do this before the type of MINNODE and
11285 MAXNODE are transformed, since tree_int_cst_min_precision relies
11286 on the TREE_TYPE of the value it is passed. */
11287 unsignedp = tree_int_cst_sgn (minnode) >= 0;
11288 lowprec = tree_int_cst_min_precision (minnode, unsignedp);
11289 highprec = tree_int_cst_min_precision (maxnode, unsignedp);
11290 precision = MAX (lowprec, highprec);
11292 if (!fixed_underlying_type_p)
11294 /* Determine the underlying type of the enumeration.
11298 The underlying type of an enumeration is an integral type that
11299 can represent all the enumerator values defined in the
11300 enumeration. It is implementation-defined which integral type is
11301 used as the underlying type for an enumeration except that the
11302 underlying type shall not be larger than int unless the value of
11303 an enumerator cannot fit in an int or unsigned int.
11305 We use "int" or an "unsigned int" as the underlying type, even if
11306 a smaller integral type would work, unless the user has
11307 explicitly requested that we use the smallest possible type. The
11308 user can request that for all enumerations with a command line
11309 flag, or for just one enumeration with an attribute. */
11311 use_short_enum = flag_short_enums
11312 || lookup_attribute ("packed", TYPE_ATTRIBUTES (enumtype));
11314 for (itk = (use_short_enum ? itk_char : itk_int);
11318 underlying_type = integer_types[itk];
11319 if (TYPE_PRECISION (underlying_type) >= precision
11320 && TYPE_UNSIGNED (underlying_type) == unsignedp)
11323 if (itk == itk_none)
11327 IF no integral type can represent all the enumerator values, the
11328 enumeration is ill-formed. */
11329 error ("no integral type can represent all of the enumerator values "
11330 "for %qT", enumtype);
11331 precision = TYPE_PRECISION (long_long_integer_type_node);
11332 underlying_type = integer_types[itk_unsigned_long_long];
11337 The value of sizeof() applied to an enumeration type, an object
11338 of an enumeration type, or an enumerator, is the value of sizeof()
11339 applied to the underlying type. */
11340 TYPE_SIZE (enumtype) = TYPE_SIZE (underlying_type);
11341 TYPE_SIZE_UNIT (enumtype) = TYPE_SIZE_UNIT (underlying_type);
11342 SET_TYPE_MODE (enumtype, TYPE_MODE (underlying_type));
11343 TYPE_ALIGN (enumtype) = TYPE_ALIGN (underlying_type);
11344 TYPE_USER_ALIGN (enumtype) = TYPE_USER_ALIGN (underlying_type);
11345 TYPE_UNSIGNED (enumtype) = TYPE_UNSIGNED (underlying_type);
11347 /* Set the underlying type of the enumeration type to the
11348 computed enumeration type, restricted to the enumerator
11350 ENUM_UNDERLYING_TYPE (enumtype)
11351 = build_distinct_type_copy (underlying_type);
11352 set_min_and_max_values_for_integral_type
11353 (ENUM_UNDERLYING_TYPE (enumtype), precision, unsignedp);
11356 underlying_type = ENUM_UNDERLYING_TYPE (enumtype);
11358 /* Compute the minimum and maximum values for the type.
11362 For an enumeration where emin is the smallest enumerator and emax
11363 is the largest, the values of the enumeration are the values of the
11364 underlying type in the range bmin to bmax, where bmin and bmax are,
11365 respectively, the smallest and largest values of the smallest bit-
11366 field that can store emin and emax. */
11368 /* The middle-end currently assumes that types with TYPE_PRECISION
11369 narrower than their underlying type are suitably zero or sign
11370 extended to fill their mode. g++ doesn't make these guarantees.
11371 Until the middle-end can represent such paradoxical types, we
11372 set the TYPE_PRECISION to the width of the underlying type. */
11373 TYPE_PRECISION (enumtype) = TYPE_PRECISION (underlying_type);
11375 set_min_and_max_values_for_integral_type (enumtype, precision, unsignedp);
11377 /* Convert each of the enumerators to the type of the underlying
11378 type of the enumeration. */
11379 for (values = TYPE_VALUES (enumtype); values; values = TREE_CHAIN (values))
11381 location_t saved_location;
11383 decl = TREE_VALUE (values);
11384 saved_location = input_location;
11385 input_location = DECL_SOURCE_LOCATION (decl);
11386 if (fixed_underlying_type_p)
11387 /* If the enumeration type has a fixed underlying type, we
11388 already checked all of the enumerator values. */
11389 value = DECL_INITIAL (decl);
11391 value = perform_implicit_conversion (underlying_type,
11392 DECL_INITIAL (decl),
11393 tf_warning_or_error);
11394 input_location = saved_location;
11396 /* Do not clobber shared ints. */
11397 value = copy_node (value);
11399 TREE_TYPE (value) = enumtype;
11400 DECL_INITIAL (decl) = value;
11403 /* Fix up all variant types of this enum type. */
11404 for (t = TYPE_MAIN_VARIANT (enumtype); t; t = TYPE_NEXT_VARIANT (t))
11406 TYPE_VALUES (t) = TYPE_VALUES (enumtype);
11407 TYPE_MIN_VALUE (t) = TYPE_MIN_VALUE (enumtype);
11408 TYPE_MAX_VALUE (t) = TYPE_MAX_VALUE (enumtype);
11409 TYPE_SIZE (t) = TYPE_SIZE (enumtype);
11410 TYPE_SIZE_UNIT (t) = TYPE_SIZE_UNIT (enumtype);
11411 SET_TYPE_MODE (t, TYPE_MODE (enumtype));
11412 TYPE_PRECISION (t) = TYPE_PRECISION (enumtype);
11413 TYPE_ALIGN (t) = TYPE_ALIGN (enumtype);
11414 TYPE_USER_ALIGN (t) = TYPE_USER_ALIGN (enumtype);
11415 TYPE_UNSIGNED (t) = TYPE_UNSIGNED (enumtype);
11416 ENUM_UNDERLYING_TYPE (t) = ENUM_UNDERLYING_TYPE (enumtype);
11419 /* Finish up the scope of a scoped enumeration. */
11420 if (SCOPED_ENUM_P (enumtype))
11423 /* Finish debugging output for this type. */
11424 rest_of_type_compilation (enumtype, namespace_bindings_p ());
11427 /* Build and install a CONST_DECL for an enumeration constant of the
11428 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
11429 Assignment of sequential values by default is handled here. */
11432 build_enumerator (tree name, tree value, tree enumtype)
11438 /* If the VALUE was erroneous, pretend it wasn't there; that will
11439 result in the enum being assigned the next value in sequence. */
11440 if (value == error_mark_node)
11443 /* Remove no-op casts from the value. */
11445 STRIP_TYPE_NOPS (value);
11447 if (! processing_template_decl)
11449 /* Validate and default VALUE. */
11450 if (value != NULL_TREE)
11452 value = integral_constant_value (value);
11454 if (TREE_CODE (value) == INTEGER_CST)
11456 value = perform_integral_promotions (value);
11457 constant_expression_warning (value);
11461 error ("enumerator value for %qD is not an integer constant", name);
11466 /* Default based on previous value. */
11467 if (value == NULL_TREE)
11469 if (TYPE_VALUES (enumtype))
11472 unsigned HOST_WIDE_INT lo;
11476 /* The next value is the previous value plus one.
11477 add_double doesn't know the type of the target expression,
11478 so we must check with int_fits_type_p as well. */
11479 prev_value = DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype)));
11480 if (error_operand_p (prev_value))
11481 value = error_mark_node;
11484 overflowed = add_double (TREE_INT_CST_LOW (prev_value),
11485 TREE_INT_CST_HIGH (prev_value),
11487 value = build_int_cst_wide (TREE_TYPE (prev_value), lo, hi);
11489 |= !int_fits_type_p (value, TREE_TYPE (prev_value));
11493 error ("overflow in enumeration values at %qD", name);
11494 value = error_mark_node;
11499 value = integer_zero_node;
11502 /* Remove no-op casts from the value. */
11503 STRIP_TYPE_NOPS (value);
11505 /* If the underlying type of the enum is fixed, check whether
11506 the enumerator values fits in the underlying type. If it
11507 does not fit, the program is ill-formed [C++0x dcl.enum]. */
11508 if (ENUM_UNDERLYING_TYPE (enumtype)
11510 && TREE_CODE (value) == INTEGER_CST
11511 && !int_fits_type_p (value, ENUM_UNDERLYING_TYPE (enumtype)))
11513 error ("enumerator value %E is too large for underlying type %<%T%>",
11514 value, ENUM_UNDERLYING_TYPE (enumtype));
11516 /* Silently convert the value so that we can continue. */
11517 value = perform_implicit_conversion (ENUM_UNDERLYING_TYPE (enumtype),
11522 /* C++ associates enums with global, function, or class declarations. */
11523 context = current_scope ();
11525 /* Build the actual enumeration constant. Note that the enumeration
11526 constants have the underlying type of the enum (if it is fixed)
11527 or the type of their initializer (if the underlying type of the
11528 enum is not fixed):
11532 If the underlying type is fixed, the type of each enumerator
11533 prior to the closing brace is the underlying type; if the
11534 initializing value of an enumerator cannot be represented by
11535 the underlying type, the program is ill-formed. If the
11536 underlying type is not fixed, the type of each enumerator is
11537 the type of its initializing value.
11539 If the underlying type is not fixed, it will be computed by
11540 finish_enum and we will reset the type of this enumerator. Of
11541 course, if we're processing a template, there may be no value. */
11542 type = value ? TREE_TYPE (value) : NULL_TREE;
11544 if (context && context == current_class_type)
11545 /* This enum declaration is local to the class. We need the full
11546 lang_decl so that we can record DECL_CLASS_CONTEXT, for example. */
11547 decl = build_lang_decl (CONST_DECL, name, type);
11549 /* It's a global enum, or it's local to a function. (Note local to
11550 a function could mean local to a class method. */
11551 decl = build_decl (input_location, CONST_DECL, name, type);
11553 DECL_CONTEXT (decl) = FROB_CONTEXT (context);
11554 TREE_CONSTANT (decl) = 1;
11555 TREE_READONLY (decl) = 1;
11556 DECL_INITIAL (decl) = value;
11558 if (context && context == current_class_type && !SCOPED_ENUM_P (enumtype))
11559 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
11560 on the TYPE_FIELDS list for `S'. (That's so that you can say
11561 things like `S::i' later.) */
11562 finish_member_declaration (decl);
11566 /* Add this enumeration constant to the list for this type. */
11567 TYPE_VALUES (enumtype) = tree_cons (name, decl, TYPE_VALUES (enumtype));
11570 /* Look for an enumerator with the given NAME within the enumeration
11571 type ENUMTYPE. This routine is used primarily for qualified name
11572 lookup into an enumerator in C++0x, e.g.,
11574 enum class Color { Red, Green, Blue };
11576 Color color = Color::Red;
11578 Returns the value corresponding to the enumerator, or
11579 NULL_TREE if no such enumerator was found. */
11581 lookup_enumerator (tree enumtype, tree name)
11584 gcc_assert (enumtype && TREE_CODE (enumtype) == ENUMERAL_TYPE);
11586 e = purpose_member (name, TYPE_VALUES (enumtype));
11587 return e? TREE_VALUE (e) : NULL_TREE;
11591 /* We're defining DECL. Make sure that its type is OK. */
11594 check_function_type (tree decl, tree current_function_parms)
11596 tree fntype = TREE_TYPE (decl);
11597 tree return_type = complete_type (TREE_TYPE (fntype));
11599 /* In a function definition, arg types must be complete. */
11600 require_complete_types_for_parms (current_function_parms);
11602 /* constexpr functions must have literal argument types and
11603 literal return type. */
11604 validate_constexpr_fundecl (decl);
11606 if (dependent_type_p (return_type))
11608 if (!COMPLETE_OR_VOID_TYPE_P (return_type)
11609 || (TYPE_FOR_JAVA (return_type) && MAYBE_CLASS_TYPE_P (return_type)))
11611 tree args = TYPE_ARG_TYPES (fntype);
11613 if (!COMPLETE_OR_VOID_TYPE_P (return_type))
11614 error ("return type %q#T is incomplete", return_type);
11616 error ("return type has Java class type %q#T", return_type);
11618 /* Make it return void instead. */
11619 if (TREE_CODE (fntype) == METHOD_TYPE)
11620 fntype = build_method_type_directly (TREE_TYPE (TREE_VALUE (args)),
11622 TREE_CHAIN (args));
11624 fntype = build_function_type (void_type_node, args);
11626 = build_exception_variant (fntype,
11627 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (decl)));
11628 fntype = (cp_build_type_attribute_variant
11629 (fntype, TYPE_ATTRIBUTES (TREE_TYPE (decl))));
11630 TREE_TYPE (decl) = fntype;
11633 abstract_virtuals_error (decl, TREE_TYPE (fntype));
11636 /* Create the FUNCTION_DECL for a function definition.
11637 DECLSPECS and DECLARATOR are the parts of the declaration;
11638 they describe the function's name and the type it returns,
11639 but twisted together in a fashion that parallels the syntax of C.
11641 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
11642 DECLARATOR is really the DECL for the function we are about to
11643 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
11644 indicating that the function is an inline defined in-class.
11646 This function creates a binding context for the function body
11647 as well as setting up the FUNCTION_DECL in current_function_decl.
11649 For C++, we must first check whether that datum makes any sense.
11650 For example, "class A local_a(1,2);" means that variable local_a
11651 is an aggregate of type A, which should have a constructor
11652 applied to it with the argument list [1, 2].
11654 On entry, DECL_INITIAL (decl1) should be NULL_TREE or error_mark_node,
11655 or may be a BLOCK if the function has been defined previously
11656 in this translation unit. On exit, DECL_INITIAL (decl1) will be
11657 error_mark_node if the function has never been defined, or
11658 a BLOCK if the function has been defined somewhere. */
11661 start_preparsed_function (tree decl1, tree attrs, int flags)
11663 tree ctype = NULL_TREE;
11666 int doing_friend = 0;
11667 struct cp_binding_level *bl;
11668 tree current_function_parms;
11669 struct c_fileinfo *finfo
11670 = get_fileinfo (LOCATION_FILE (DECL_SOURCE_LOCATION (decl1)));
11671 bool honor_interface;
11673 /* Sanity check. */
11674 gcc_assert (TREE_CODE (TREE_VALUE (void_list_node)) == VOID_TYPE);
11675 gcc_assert (TREE_CHAIN (void_list_node) == NULL_TREE);
11677 fntype = TREE_TYPE (decl1);
11678 if (TREE_CODE (fntype) == METHOD_TYPE)
11679 ctype = TYPE_METHOD_BASETYPE (fntype);
11681 /* ISO C++ 11.4/5. A friend function defined in a class is in
11682 the (lexical) scope of the class in which it is defined. */
11683 if (!ctype && DECL_FRIEND_P (decl1))
11685 ctype = DECL_FRIEND_CONTEXT (decl1);
11687 /* CTYPE could be null here if we're dealing with a template;
11688 for example, `inline friend float foo()' inside a template
11689 will have no CTYPE set. */
11690 if (ctype && TREE_CODE (ctype) != RECORD_TYPE)
11696 if (DECL_DECLARED_INLINE_P (decl1)
11697 && lookup_attribute ("noinline", attrs))
11698 warning (0, "inline function %q+D given attribute noinline", decl1);
11700 /* Handle gnu_inline attribute. */
11701 if (GNU_INLINE_P (decl1))
11703 DECL_EXTERNAL (decl1) = 1;
11704 DECL_NOT_REALLY_EXTERN (decl1) = 0;
11705 DECL_INTERFACE_KNOWN (decl1) = 1;
11706 DECL_DISREGARD_INLINE_LIMITS (decl1) = 1;
11709 if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1))
11710 /* This is a constructor, we must ensure that any default args
11711 introduced by this definition are propagated to the clones
11712 now. The clones are used directly in overload resolution. */
11713 adjust_clone_args (decl1);
11715 /* Sometimes we don't notice that a function is a static member, and
11716 build a METHOD_TYPE for it. Fix that up now. */
11717 if (ctype != NULL_TREE && DECL_STATIC_FUNCTION_P (decl1)
11718 && TREE_CODE (TREE_TYPE (decl1)) == METHOD_TYPE)
11720 revert_static_member_fn (decl1);
11724 /* Set up current_class_type, and enter the scope of the class, if
11727 push_nested_class (ctype);
11728 else if (DECL_STATIC_FUNCTION_P (decl1))
11729 push_nested_class (DECL_CONTEXT (decl1));
11731 /* Now that we have entered the scope of the class, we must restore
11732 the bindings for any template parameters surrounding DECL1, if it
11733 is an inline member template. (Order is important; consider the
11734 case where a template parameter has the same name as a field of
11735 the class.) It is not until after this point that
11736 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
11737 if (flags & SF_INCLASS_INLINE)
11738 maybe_begin_member_template_processing (decl1);
11740 /* Effective C++ rule 15. */
11742 && DECL_OVERLOADED_OPERATOR_P (decl1) == NOP_EXPR
11743 && TREE_CODE (TREE_TYPE (fntype)) == VOID_TYPE)
11744 warning (OPT_Weffc__, "%<operator=%> should return a reference to %<*this%>");
11746 /* Make the init_value nonzero so pushdecl knows this is not tentative.
11747 error_mark_node is replaced below (in poplevel) with the BLOCK. */
11748 if (!DECL_INITIAL (decl1))
11749 DECL_INITIAL (decl1) = error_mark_node;
11751 /* This function exists in static storage.
11752 (This does not mean `static' in the C sense!) */
11753 TREE_STATIC (decl1) = 1;
11755 /* We must call push_template_decl after current_class_type is set
11756 up. (If we are processing inline definitions after exiting a
11757 class scope, current_class_type will be NULL_TREE until set above
11758 by push_nested_class.) */
11759 if (processing_template_decl)
11761 /* FIXME: Handle error_mark_node more gracefully. */
11762 tree newdecl1 = push_template_decl (decl1);
11763 if (newdecl1 != error_mark_node)
11767 /* We are now in the scope of the function being defined. */
11768 current_function_decl = decl1;
11770 /* Save the parm names or decls from this function's declarator
11771 where store_parm_decls will find them. */
11772 current_function_parms = DECL_ARGUMENTS (decl1);
11774 /* Make sure the parameter and return types are reasonable. When
11775 you declare a function, these types can be incomplete, but they
11776 must be complete when you define the function. */
11777 check_function_type (decl1, current_function_parms);
11779 /* Build the return declaration for the function. */
11780 restype = TREE_TYPE (fntype);
11781 if (DECL_RESULT (decl1) == NULL_TREE)
11785 resdecl = build_decl (input_location, RESULT_DECL, 0, restype);
11786 DECL_ARTIFICIAL (resdecl) = 1;
11787 DECL_IGNORED_P (resdecl) = 1;
11788 DECL_RESULT (decl1) = resdecl;
11790 cp_apply_type_quals_to_decl (cp_type_quals (restype), resdecl);
11793 /* Let the user know we're compiling this function. */
11794 announce_function (decl1);
11796 /* Record the decl so that the function name is defined.
11797 If we already have a decl for this name, and it is a FUNCTION_DECL,
11798 use the old decl. */
11799 if (!processing_template_decl && !(flags & SF_PRE_PARSED))
11801 /* A specialization is not used to guide overload resolution. */
11802 if (!DECL_FUNCTION_MEMBER_P (decl1)
11803 && !(DECL_USE_TEMPLATE (decl1) &&
11804 PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl1))))
11806 tree olddecl = pushdecl (decl1);
11808 if (olddecl == error_mark_node)
11809 /* If something went wrong when registering the declaration,
11810 use DECL1; we have to have a FUNCTION_DECL to use when
11811 parsing the body of the function. */
11815 /* Otherwise, OLDDECL is either a previous declaration
11816 of the same function or DECL1 itself. */
11818 if (warn_missing_declarations
11819 && olddecl == decl1
11820 && !DECL_MAIN_P (decl1)
11821 && TREE_PUBLIC (decl1)
11822 && !DECL_DECLARED_INLINE_P (decl1))
11826 /* Check whether DECL1 is in an anonymous
11828 for (context = DECL_CONTEXT (decl1);
11830 context = DECL_CONTEXT (context))
11832 if (TREE_CODE (context) == NAMESPACE_DECL
11833 && DECL_NAME (context) == NULL_TREE)
11837 if (context == NULL)
11838 warning (OPT_Wmissing_declarations,
11839 "no previous declaration for %q+D", decl1);
11847 /* We need to set the DECL_CONTEXT. */
11848 if (!DECL_CONTEXT (decl1) && DECL_TEMPLATE_INFO (decl1))
11849 DECL_CONTEXT (decl1) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1));
11851 fntype = TREE_TYPE (decl1);
11853 /* If #pragma weak applies, mark the decl appropriately now.
11854 The pragma only applies to global functions. Because
11855 determining whether or not the #pragma applies involves
11856 computing the mangled name for the declaration, we cannot
11857 apply the pragma until after we have merged this declaration
11858 with any previous declarations; if the original declaration
11859 has a linkage specification, that specification applies to
11860 the definition as well, and may affect the mangled name. */
11861 if (!DECL_CONTEXT (decl1))
11862 maybe_apply_pragma_weak (decl1);
11865 /* Reset this in case the call to pushdecl changed it. */
11866 current_function_decl = decl1;
11868 gcc_assert (DECL_INITIAL (decl1));
11870 /* This function may already have been parsed, in which case just
11871 return; our caller will skip over the body without parsing. */
11872 if (DECL_INITIAL (decl1) != error_mark_node)
11875 /* Initialize RTL machinery. We cannot do this until
11876 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
11877 even when processing a template; this is how we get
11878 CFUN set up, and our per-function variables initialized.
11879 FIXME factor out the non-RTL stuff. */
11880 bl = current_binding_level;
11881 allocate_struct_function (decl1, processing_template_decl);
11883 /* Initialize the language data structures. Whenever we start
11884 a new function, we destroy temporaries in the usual way. */
11885 cfun->language = GGC_CNEW (struct language_function);
11886 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
11887 current_binding_level = bl;
11889 /* Even though we're inside a function body, we still don't want to
11890 call expand_expr to calculate the size of a variable-sized array.
11891 We haven't necessarily assigned RTL to all variables yet, so it's
11892 not safe to try to expand expressions involving them. */
11893 cfun->dont_save_pending_sizes_p = 1;
11895 /* Start the statement-tree, start the tree now. */
11896 DECL_SAVED_TREE (decl1) = push_stmt_list ();
11898 /* If we are (erroneously) defining a function that we have already
11899 defined before, wipe out what we knew before. */
11900 if (!DECL_PENDING_INLINE_P (decl1))
11901 DECL_SAVED_FUNCTION_DATA (decl1) = NULL;
11903 if (ctype && !doing_friend && !DECL_STATIC_FUNCTION_P (decl1))
11905 /* We know that this was set up by `grokclassfn'. We do not
11906 wait until `store_parm_decls', since evil parse errors may
11907 never get us to that point. Here we keep the consistency
11908 between `current_class_type' and `current_class_ptr'. */
11909 tree t = DECL_ARGUMENTS (decl1);
11911 gcc_assert (t != NULL_TREE && TREE_CODE (t) == PARM_DECL);
11912 gcc_assert (TREE_CODE (TREE_TYPE (t)) == POINTER_TYPE);
11914 cp_function_chain->x_current_class_ref
11915 = cp_build_indirect_ref (t, RO_NULL, tf_warning_or_error);
11916 cp_function_chain->x_current_class_ptr = t;
11918 /* Constructors and destructors need to know whether they're "in
11919 charge" of initializing virtual base classes. */
11920 t = TREE_CHAIN (t);
11921 if (DECL_HAS_IN_CHARGE_PARM_P (decl1))
11923 current_in_charge_parm = t;
11924 t = TREE_CHAIN (t);
11926 if (DECL_HAS_VTT_PARM_P (decl1))
11928 gcc_assert (DECL_NAME (t) == vtt_parm_identifier);
11929 current_vtt_parm = t;
11933 honor_interface = (!DECL_TEMPLATE_INSTANTIATION (decl1)
11934 /* Implicitly-defined methods (like the
11935 destructor for a class in which no destructor
11936 is explicitly declared) must not be defined
11937 until their definition is needed. So, we
11938 ignore interface specifications for
11939 compiler-generated functions. */
11940 && !DECL_ARTIFICIAL (decl1));
11942 if (DECL_INTERFACE_KNOWN (decl1))
11944 tree ctx = decl_function_context (decl1);
11946 if (DECL_NOT_REALLY_EXTERN (decl1))
11947 DECL_EXTERNAL (decl1) = 0;
11949 if (ctx != NULL_TREE && DECL_DECLARED_INLINE_P (ctx)
11950 && TREE_PUBLIC (ctx))
11951 /* This is a function in a local class in an extern inline
11953 comdat_linkage (decl1);
11955 /* If this function belongs to an interface, it is public.
11956 If it belongs to someone else's interface, it is also external.
11957 This only affects inlines and template instantiations. */
11958 else if (!finfo->interface_unknown && honor_interface)
11960 if (DECL_DECLARED_INLINE_P (decl1)
11961 || DECL_TEMPLATE_INSTANTIATION (decl1)
11962 || processing_template_decl)
11964 DECL_EXTERNAL (decl1)
11965 = (finfo->interface_only
11966 || (DECL_DECLARED_INLINE_P (decl1)
11967 && ! flag_implement_inlines
11968 && !DECL_VINDEX (decl1)));
11970 /* For WIN32 we also want to put these in linkonce sections. */
11971 maybe_make_one_only (decl1);
11974 DECL_EXTERNAL (decl1) = 0;
11975 DECL_INTERFACE_KNOWN (decl1) = 1;
11976 /* If this function is in an interface implemented in this file,
11977 make sure that the back end knows to emit this function
11979 if (!DECL_EXTERNAL (decl1))
11980 mark_needed (decl1);
11982 else if (finfo->interface_unknown && finfo->interface_only
11983 && honor_interface)
11985 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
11986 interface, we will have both finfo->interface_unknown and
11987 finfo->interface_only set. In that case, we don't want to
11988 use the normal heuristics because someone will supply a
11989 #pragma implementation elsewhere, and deducing it here would
11990 produce a conflict. */
11991 comdat_linkage (decl1);
11992 DECL_EXTERNAL (decl1) = 0;
11993 DECL_INTERFACE_KNOWN (decl1) = 1;
11994 DECL_DEFER_OUTPUT (decl1) = 1;
11998 /* This is a definition, not a reference.
11999 So clear DECL_EXTERNAL, unless this is a GNU extern inline. */
12000 if (!GNU_INLINE_P (decl1))
12001 DECL_EXTERNAL (decl1) = 0;
12003 if ((DECL_DECLARED_INLINE_P (decl1)
12004 || DECL_TEMPLATE_INSTANTIATION (decl1))
12005 && ! DECL_INTERFACE_KNOWN (decl1)
12006 /* Don't try to defer nested functions for now. */
12007 && ! decl_function_context (decl1))
12008 DECL_DEFER_OUTPUT (decl1) = 1;
12010 DECL_INTERFACE_KNOWN (decl1) = 1;
12013 /* Determine the ELF visibility attribute for the function. We must not
12014 do this before calling "pushdecl", as we must allow "duplicate_decls"
12015 to merge any attributes appropriately. We also need to wait until
12017 if (!DECL_CLONED_FUNCTION_P (decl1))
12018 determine_visibility (decl1);
12020 begin_scope (sk_function_parms, decl1);
12024 if (DECL_DESTRUCTOR_P (decl1)
12025 || (DECL_CONSTRUCTOR_P (decl1)
12026 && targetm.cxx.cdtor_returns_this ()))
12028 cdtor_label = build_decl (input_location,
12029 LABEL_DECL, NULL_TREE, NULL_TREE);
12030 DECL_CONTEXT (cdtor_label) = current_function_decl;
12033 start_fname_decls ();
12035 store_parm_decls (current_function_parms);
12039 /* Like start_preparsed_function, except that instead of a
12040 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
12042 Returns 1 on success. If the DECLARATOR is not suitable for a function
12043 (it defines a datum instead), we return 0, which tells
12044 yyparse to report a parse error. */
12047 start_function (cp_decl_specifier_seq *declspecs,
12048 const cp_declarator *declarator,
12053 decl1 = grokdeclarator (declarator, declspecs, FUNCDEF, 1, &attrs);
12054 if (decl1 == error_mark_node)
12056 /* If the declarator is not suitable for a function definition,
12057 cause a syntax error. */
12058 if (decl1 == NULL_TREE || TREE_CODE (decl1) != FUNCTION_DECL)
12060 error ("invalid function declaration");
12064 if (DECL_MAIN_P (decl1))
12065 /* main must return int. grokfndecl should have corrected it
12066 (and issued a diagnostic) if the user got it wrong. */
12067 gcc_assert (same_type_p (TREE_TYPE (TREE_TYPE (decl1)),
12068 integer_type_node));
12070 start_preparsed_function (decl1, attrs, /*flags=*/SF_DEFAULT);
12075 /* Returns true iff an EH_SPEC_BLOCK should be created in the body of
12079 use_eh_spec_block (tree fn)
12081 return (flag_exceptions && flag_enforce_eh_specs
12082 && !processing_template_decl
12083 && TYPE_RAISES_EXCEPTIONS (TREE_TYPE (fn))
12084 /* We insert the EH_SPEC_BLOCK only in the original
12085 function; then, it is copied automatically to the
12087 && !DECL_CLONED_FUNCTION_P (fn)
12088 /* Implicitly-generated constructors and destructors have
12089 exception specifications. However, those specifications
12090 are the union of the possible exceptions specified by the
12091 constructors/destructors for bases and members, so no
12092 unallowed exception will ever reach this function. By
12093 not creating the EH_SPEC_BLOCK we save a little memory,
12094 and we avoid spurious warnings about unreachable
12096 && !DECL_ARTIFICIAL (fn));
12099 /* Store the parameter declarations into the current function declaration.
12100 This is called after parsing the parameter declarations, before
12101 digesting the body of the function.
12103 Also install to binding contour return value identifier, if any. */
12106 store_parm_decls (tree current_function_parms)
12108 tree fndecl = current_function_decl;
12111 /* This is a chain of any other decls that came in among the parm
12112 declarations. If a parm is declared with enum {foo, bar} x;
12113 then CONST_DECLs for foo and bar are put here. */
12114 tree nonparms = NULL_TREE;
12116 if (current_function_parms)
12118 /* This case is when the function was defined with an ANSI prototype.
12119 The parms already have decls, so we need not do anything here
12120 except record them as in effect
12121 and complain if any redundant old-style parm decls were written. */
12123 tree specparms = current_function_parms;
12126 /* Must clear this because it might contain TYPE_DECLs declared
12128 current_binding_level->names = NULL;
12130 /* If we're doing semantic analysis, then we'll call pushdecl
12131 for each of these. We must do them in reverse order so that
12132 they end in the correct forward order. */
12133 specparms = nreverse (specparms);
12135 for (parm = specparms; parm; parm = next)
12137 next = TREE_CHAIN (parm);
12138 if (TREE_CODE (parm) == PARM_DECL)
12140 if (DECL_NAME (parm) == NULL_TREE
12141 || TREE_CODE (parm) != VOID_TYPE)
12144 error ("parameter %qD declared void", parm);
12148 /* If we find an enum constant or a type tag,
12149 put it aside for the moment. */
12150 TREE_CHAIN (parm) = NULL_TREE;
12151 nonparms = chainon (nonparms, parm);
12155 /* Get the decls in their original chain order and record in the
12156 function. This is all and only the PARM_DECLs that were
12157 pushed into scope by the loop above. */
12158 DECL_ARGUMENTS (fndecl) = getdecls ();
12161 DECL_ARGUMENTS (fndecl) = NULL_TREE;
12163 /* Now store the final chain of decls for the arguments
12164 as the decl-chain of the current lexical scope.
12165 Put the enumerators in as well, at the front so that
12166 DECL_ARGUMENTS is not modified. */
12167 current_binding_level->names = chainon (nonparms, DECL_ARGUMENTS (fndecl));
12169 if (use_eh_spec_block (current_function_decl))
12170 current_eh_spec_block = begin_eh_spec_block ();
12174 /* We have finished doing semantic analysis on DECL, but have not yet
12175 generated RTL for its body. Save away our current state, so that
12176 when we want to generate RTL later we know what to do. */
12179 save_function_data (tree decl)
12181 struct language_function *f;
12183 /* Save the language-specific per-function data so that we can
12184 get it back when we really expand this function. */
12185 gcc_assert (!DECL_PENDING_INLINE_P (decl));
12188 f = GGC_NEW (struct language_function);
12189 memcpy (f, cp_function_chain, sizeof (struct language_function));
12190 DECL_SAVED_FUNCTION_DATA (decl) = f;
12192 /* Clear out the bits we don't need. */
12193 f->base.x_stmt_tree.x_cur_stmt_list = NULL_TREE;
12194 f->bindings = NULL;
12195 f->x_local_names = NULL;
12199 /* Set the return value of the constructor (if present). */
12202 finish_constructor_body (void)
12207 if (targetm.cxx.cdtor_returns_this ()
12208 && (! TYPE_FOR_JAVA (current_class_type)))
12210 /* Any return from a constructor will end up here. */
12211 add_stmt (build_stmt (input_location, LABEL_EXPR, cdtor_label));
12213 val = DECL_ARGUMENTS (current_function_decl);
12214 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
12215 DECL_RESULT (current_function_decl), val);
12216 /* Return the address of the object. */
12217 exprstmt = build_stmt (input_location, RETURN_EXPR, val);
12218 add_stmt (exprstmt);
12222 /* Do all the processing for the beginning of a destructor; set up the
12223 vtable pointers and cleanups for bases and members. */
12226 begin_destructor_body (void)
12228 tree compound_stmt;
12230 /* If the CURRENT_CLASS_TYPE is incomplete, we will have already
12231 issued an error message. We still want to try to process the
12232 body of the function, but initialize_vtbl_ptrs will crash if
12233 TYPE_BINFO is NULL. */
12234 if (COMPLETE_TYPE_P (current_class_type))
12236 compound_stmt = begin_compound_stmt (0);
12237 /* Make all virtual function table pointers in non-virtual base
12238 classes point to CURRENT_CLASS_TYPE's virtual function
12240 initialize_vtbl_ptrs (current_class_ptr);
12241 finish_compound_stmt (compound_stmt);
12243 /* And insert cleanups for our bases and members so that they
12244 will be properly destroyed if we throw. */
12245 push_base_cleanups ();
12249 /* At the end of every destructor we generate code to delete the object if
12250 necessary. Do that now. */
12253 finish_destructor_body (void)
12257 /* Any return from a destructor will end up here; that way all base
12258 and member cleanups will be run when the function returns. */
12259 add_stmt (build_stmt (input_location, LABEL_EXPR, cdtor_label));
12261 /* In a virtual destructor, we must call delete. */
12262 if (DECL_VIRTUAL_P (current_function_decl))
12265 tree virtual_size = cxx_sizeof (current_class_type);
12269 At the point of definition of a virtual destructor (including
12270 an implicit definition), non-placement operator delete shall
12271 be looked up in the scope of the destructor's class and if
12272 found shall be accessible and unambiguous. */
12273 exprstmt = build_op_delete_call(DELETE_EXPR, current_class_ptr,
12275 /*global_p=*/false,
12276 /*placement=*/NULL_TREE,
12277 /*alloc_fn=*/NULL_TREE);
12279 if_stmt = begin_if_stmt ();
12280 finish_if_stmt_cond (build2 (BIT_AND_EXPR, integer_type_node,
12281 current_in_charge_parm,
12284 finish_expr_stmt (exprstmt);
12285 finish_then_clause (if_stmt);
12286 finish_if_stmt (if_stmt);
12289 if (targetm.cxx.cdtor_returns_this ())
12293 val = DECL_ARGUMENTS (current_function_decl);
12294 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
12295 DECL_RESULT (current_function_decl), val);
12296 /* Return the address of the object. */
12297 exprstmt = build_stmt (input_location, RETURN_EXPR, val);
12298 add_stmt (exprstmt);
12302 /* Do the necessary processing for the beginning of a function body, which
12303 in this case includes member-initializers, but not the catch clauses of
12304 a function-try-block. Currently, this means opening a binding level
12305 for the member-initializers (in a ctor) and member cleanups (in a dtor). */
12308 begin_function_body (void)
12312 if (! FUNCTION_NEEDS_BODY_BLOCK (current_function_decl))
12315 if (processing_template_decl)
12316 /* Do nothing now. */;
12318 /* Always keep the BLOCK node associated with the outermost pair of
12319 curly braces of a function. These are needed for correct
12320 operation of dwarfout.c. */
12321 keep_next_level (true);
12323 stmt = begin_compound_stmt (BCS_FN_BODY);
12325 if (processing_template_decl)
12326 /* Do nothing now. */;
12327 else if (DECL_DESTRUCTOR_P (current_function_decl))
12328 begin_destructor_body ();
12333 /* Do the processing for the end of a function body. Currently, this means
12334 closing out the cleanups for fully-constructed bases and members, and in
12335 the case of the destructor, deleting the object if desired. Again, this
12336 is only meaningful for [cd]tors, since they are the only functions where
12337 there is a significant distinction between the main body and any
12338 function catch clauses. Handling, say, main() return semantics here
12339 would be wrong, as flowing off the end of a function catch clause for
12340 main() would also need to return 0. */
12343 finish_function_body (tree compstmt)
12345 if (compstmt == NULL_TREE)
12348 /* Close the block. */
12349 finish_compound_stmt (compstmt);
12351 if (processing_template_decl)
12352 /* Do nothing now. */;
12353 else if (DECL_CONSTRUCTOR_P (current_function_decl))
12354 finish_constructor_body ();
12355 else if (DECL_DESTRUCTOR_P (current_function_decl))
12356 finish_destructor_body ();
12359 /* Given a function, returns the BLOCK corresponding to the outermost level
12360 of curly braces, skipping the artificial block created for constructor
12364 outer_curly_brace_block (tree fndecl)
12366 tree block = BLOCK_SUBBLOCKS (DECL_INITIAL (fndecl));
12367 if (FUNCTION_NEEDS_BODY_BLOCK (current_function_decl))
12368 /* Skip the artificial function body block. */
12369 block = BLOCK_SUBBLOCKS (block);
12373 /* Finish up a function declaration and compile that function
12374 all the way to assembler language output. The free the storage
12375 for the function definition.
12377 FLAGS is a bitwise or of the following values:
12379 We just finished processing the body of an in-class inline
12380 function definition. (This processing will have taken place
12381 after the class definition is complete.) */
12384 finish_function (int flags)
12386 tree fndecl = current_function_decl;
12387 tree fntype, ctype = NULL_TREE;
12388 int inclass_inline = (flags & 2) != 0;
12391 /* When we get some parse errors, we can end up without a
12392 current_function_decl, so cope. */
12393 if (fndecl == NULL_TREE)
12394 return error_mark_node;
12396 gcc_assert (!defer_mark_used_calls);
12397 defer_mark_used_calls = true;
12399 if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fndecl)
12400 && DECL_VIRTUAL_P (fndecl)
12401 && !processing_template_decl)
12403 tree fnclass = DECL_CONTEXT (fndecl);
12404 if (fndecl == CLASSTYPE_KEY_METHOD (fnclass))
12405 keyed_classes = tree_cons (NULL_TREE, fnclass, keyed_classes);
12408 nested = function_depth > 1;
12409 fntype = TREE_TYPE (fndecl);
12411 /* TREE_READONLY (fndecl) = 1;
12412 This caused &foo to be of type ptr-to-const-function
12413 which then got a warning when stored in a ptr-to-function variable. */
12415 gcc_assert (building_stmt_tree ());
12416 /* The current function is being defined, so its DECL_INITIAL should
12417 be set, and unless there's a multiple definition, it should be
12418 error_mark_node. */
12419 gcc_assert (DECL_INITIAL (fndecl) == error_mark_node);
12421 /* For a cloned function, we've already got all the code we need;
12422 there's no need to add any extra bits. */
12423 if (!DECL_CLONED_FUNCTION_P (fndecl))
12425 if (DECL_MAIN_P (current_function_decl))
12429 /* Make it so that `main' always returns 0 by default (or
12432 stmt = finish_return_stmt (integer_one_node);
12434 stmt = finish_return_stmt (integer_zero_node);
12436 /* Hack. We don't want the middle-end to warn that this
12437 return is unreachable, so put the statement on the
12440 location_t linezero = linemap_line_start (line_table, 0, 1);
12441 SET_EXPR_LOCATION (stmt, linezero);
12445 if (use_eh_spec_block (current_function_decl))
12446 finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
12447 (TREE_TYPE (current_function_decl)),
12448 current_eh_spec_block);
12451 /* If we're saving up tree structure, tie off the function now. */
12452 DECL_SAVED_TREE (fndecl) = pop_stmt_list (DECL_SAVED_TREE (fndecl));
12454 finish_fname_decls ();
12456 /* If this function can't throw any exceptions, remember that. */
12457 if (!processing_template_decl
12458 && !cp_function_chain->can_throw
12459 && !flag_non_call_exceptions
12460 && !DECL_REPLACEABLE_P (fndecl))
12461 TREE_NOTHROW (fndecl) = 1;
12463 /* This must come after expand_function_end because cleanups might
12464 have declarations (from inline functions) that need to go into
12465 this function's blocks. */
12467 /* If the current binding level isn't the outermost binding level
12468 for this function, either there is a bug, or we have experienced
12469 syntax errors and the statement tree is malformed. */
12470 if (current_binding_level->kind != sk_function_parms)
12472 /* Make sure we have already experienced errors. */
12473 gcc_assert (errorcount);
12475 /* Throw away the broken statement tree and extra binding
12477 DECL_SAVED_TREE (fndecl) = alloc_stmt_list ();
12479 while (current_binding_level->kind != sk_function_parms)
12481 if (current_binding_level->kind == sk_class)
12482 pop_nested_class ();
12484 poplevel (0, 0, 0);
12487 poplevel (1, 0, 1);
12489 /* Statements should always be full-expressions at the outermost set
12490 of curly braces for a function. */
12491 gcc_assert (stmts_are_full_exprs_p ());
12493 /* Set up the named return value optimization, if we can. Candidate
12494 variables are selected in check_return_expr. */
12495 if (current_function_return_value)
12497 tree r = current_function_return_value;
12500 if (r != error_mark_node
12501 /* This is only worth doing for fns that return in memory--and
12502 simpler, since we don't have to worry about promoted modes. */
12503 && aggregate_value_p (TREE_TYPE (TREE_TYPE (fndecl)), fndecl)
12504 /* Only allow this for variables declared in the outer scope of
12505 the function so we know that their lifetime always ends with a
12506 return; see g++.dg/opt/nrv6.C. We could be more flexible if
12507 we were to do this optimization in tree-ssa. */
12508 && (outer = outer_curly_brace_block (fndecl))
12509 && chain_member (r, BLOCK_VARS (outer)))
12510 finalize_nrv (&DECL_SAVED_TREE (fndecl), r, DECL_RESULT (fndecl));
12512 current_function_return_value = NULL_TREE;
12515 /* Remember that we were in class scope. */
12516 if (current_class_name)
12517 ctype = current_class_type;
12519 /* Must mark the RESULT_DECL as being in this function. */
12520 DECL_CONTEXT (DECL_RESULT (fndecl)) = fndecl;
12522 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
12523 to the FUNCTION_DECL node itself. */
12524 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl)) = fndecl;
12526 /* Save away current state, if appropriate. */
12527 if (!processing_template_decl)
12528 save_function_data (fndecl);
12530 /* Complain if there's just no return statement. */
12531 if (warn_return_type
12532 && TREE_CODE (TREE_TYPE (fntype)) != VOID_TYPE
12533 && !dependent_type_p (TREE_TYPE (fntype))
12534 && !current_function_returns_value && !current_function_returns_null
12535 /* Don't complain if we abort or throw. */
12536 && !current_function_returns_abnormally
12537 /* Don't complain if we are declared noreturn. */
12538 && !TREE_THIS_VOLATILE (fndecl)
12539 && !DECL_NAME (DECL_RESULT (fndecl))
12540 && !TREE_NO_WARNING (fndecl)
12541 /* Structor return values (if any) are set by the compiler. */
12542 && !DECL_CONSTRUCTOR_P (fndecl)
12543 && !DECL_DESTRUCTOR_P (fndecl))
12545 warning (OPT_Wreturn_type,
12546 "no return statement in function returning non-void");
12547 TREE_NO_WARNING (fndecl) = 1;
12550 /* Store the end of the function, so that we get good line number
12551 info for the epilogue. */
12552 cfun->function_end_locus = input_location;
12554 /* Genericize before inlining. */
12555 if (!processing_template_decl)
12557 struct language_function *f = DECL_SAVED_FUNCTION_DATA (fndecl);
12558 invoke_plugin_callbacks (PLUGIN_PRE_GENERICIZE, fndecl);
12559 cp_genericize (fndecl);
12560 /* Clear out the bits we don't need. */
12561 f->x_current_class_ptr = NULL;
12562 f->x_current_class_ref = NULL;
12563 f->x_eh_spec_block = NULL;
12564 f->x_in_charge_parm = NULL;
12565 f->x_vtt_parm = NULL;
12566 f->x_return_value = NULL;
12567 f->bindings = NULL;
12568 f->extern_decl_map = NULL;
12570 /* Clear out the bits we don't need. */
12571 local_names = NULL;
12573 /* We're leaving the context of this function, so zap cfun. It's still in
12574 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
12576 current_function_decl = NULL;
12578 /* If this is an in-class inline definition, we may have to pop the
12579 bindings for the template parameters that we added in
12580 maybe_begin_member_template_processing when start_function was
12582 if (inclass_inline)
12583 maybe_end_member_template_processing ();
12585 /* Leave the scope of the class. */
12587 pop_nested_class ();
12593 /* Let the error reporting routines know that we're outside a
12594 function. For a nested function, this value is used in
12595 cxx_pop_function_context and then reset via pop_function_context. */
12596 current_function_decl = NULL_TREE;
12598 defer_mark_used_calls = false;
12599 if (deferred_mark_used_calls)
12604 for (i = 0; VEC_iterate (tree, deferred_mark_used_calls, i, decl); i++)
12606 VEC_free (tree, gc, deferred_mark_used_calls);
12612 /* Create the FUNCTION_DECL for a function definition.
12613 DECLSPECS and DECLARATOR are the parts of the declaration;
12614 they describe the return type and the name of the function,
12615 but twisted together in a fashion that parallels the syntax of C.
12617 This function creates a binding context for the function body
12618 as well as setting up the FUNCTION_DECL in current_function_decl.
12620 Returns a FUNCTION_DECL on success.
12622 If the DECLARATOR is not suitable for a function (it defines a datum
12623 instead), we return 0, which tells yyparse to report a parse error.
12625 May return void_type_node indicating that this method is actually
12626 a friend. See grokfield for more details.
12628 Came here with a `.pushlevel' .
12630 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
12631 CHANGES TO CODE IN `grokfield'. */
12634 grokmethod (cp_decl_specifier_seq *declspecs,
12635 const cp_declarator *declarator, tree attrlist)
12637 tree fndecl = grokdeclarator (declarator, declspecs, MEMFUNCDEF, 0,
12640 if (fndecl == error_mark_node)
12641 return error_mark_node;
12643 if (fndecl == NULL || TREE_CODE (fndecl) != FUNCTION_DECL)
12645 error ("invalid member function declaration");
12646 return error_mark_node;
12650 cplus_decl_attributes (&fndecl, attrlist, 0);
12652 /* Pass friends other than inline friend functions back. */
12653 if (fndecl == void_type_node)
12656 if (DECL_IN_AGGR_P (fndecl))
12658 if (DECL_CONTEXT (fndecl)
12659 && TREE_CODE (DECL_CONTEXT (fndecl)) != NAMESPACE_DECL)
12660 error ("%qD is already defined in class %qT", fndecl,
12661 DECL_CONTEXT (fndecl));
12662 return error_mark_node;
12665 check_template_shadow (fndecl);
12667 DECL_DECLARED_INLINE_P (fndecl) = 1;
12668 DECL_NO_INLINE_WARNING_P (fndecl) = 1;
12670 /* We process method specializations in finish_struct_1. */
12671 if (processing_template_decl && !DECL_TEMPLATE_SPECIALIZATION (fndecl))
12673 fndecl = push_template_decl (fndecl);
12674 if (fndecl == error_mark_node)
12678 if (! DECL_FRIEND_P (fndecl))
12680 if (TREE_CHAIN (fndecl))
12682 fndecl = copy_node (fndecl);
12683 TREE_CHAIN (fndecl) = NULL_TREE;
12687 cp_finish_decl (fndecl, NULL_TREE, false, NULL_TREE, 0);
12689 DECL_IN_AGGR_P (fndecl) = 1;
12694 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
12695 we can lay it out later, when and if its type becomes complete. */
12698 maybe_register_incomplete_var (tree var)
12700 gcc_assert (TREE_CODE (var) == VAR_DECL);
12702 /* Keep track of variables with incomplete types. */
12703 if (!processing_template_decl && TREE_TYPE (var) != error_mark_node
12704 && DECL_EXTERNAL (var))
12706 tree inner_type = TREE_TYPE (var);
12708 while (TREE_CODE (inner_type) == ARRAY_TYPE)
12709 inner_type = TREE_TYPE (inner_type);
12710 inner_type = TYPE_MAIN_VARIANT (inner_type);
12712 if ((!COMPLETE_TYPE_P (inner_type) && CLASS_TYPE_P (inner_type))
12713 /* RTTI TD entries are created while defining the type_info. */
12714 || (TYPE_LANG_SPECIFIC (inner_type)
12715 && TYPE_BEING_DEFINED (inner_type)))
12716 incomplete_vars = tree_cons (inner_type, var, incomplete_vars);
12720 /* Called when a class type (given by TYPE) is defined. If there are
12721 any existing VAR_DECLs whose type has been completed by this
12722 declaration, update them now. */
12725 complete_vars (tree type)
12727 tree *list = &incomplete_vars;
12729 gcc_assert (CLASS_TYPE_P (type));
12732 if (same_type_p (type, TREE_PURPOSE (*list)))
12734 tree var = TREE_VALUE (*list);
12735 tree type = TREE_TYPE (var);
12736 /* Complete the type of the variable. The VAR_DECL itself
12737 will be laid out in expand_expr. */
12738 complete_type (type);
12739 cp_apply_type_quals_to_decl (cp_type_quals (type), var);
12740 /* Remove this entry from the list. */
12741 *list = TREE_CHAIN (*list);
12744 list = &TREE_CHAIN (*list);
12747 /* Check for pending declarations which may have abstract type. */
12748 complete_type_check_abstract (type);
12751 /* If DECL is of a type which needs a cleanup, build and return an
12752 expression to perform that cleanup here. Return NULL_TREE if no
12753 cleanup need be done. */
12756 cxx_maybe_build_cleanup (tree decl)
12762 /* Assume no cleanup is required. */
12763 cleanup = NULL_TREE;
12765 if (error_operand_p (decl))
12768 /* Handle "__attribute__((cleanup))". We run the cleanup function
12769 before the destructor since the destructor is what actually
12770 terminates the lifetime of the object. */
12771 attr = lookup_attribute ("cleanup", DECL_ATTRIBUTES (decl));
12778 /* Get the name specified by the user for the cleanup function. */
12779 id = TREE_VALUE (TREE_VALUE (attr));
12780 /* Look up the name to find the cleanup function to call. It is
12781 important to use lookup_name here because that is what is
12782 used in c-common.c:handle_cleanup_attribute when performing
12783 initial checks on the attribute. Note that those checks
12784 include ensuring that the function found is not an overloaded
12785 function, or an object with an overloaded call operator,
12786 etc.; we can rely on the fact that the function found is an
12787 ordinary FUNCTION_DECL. */
12788 fn = lookup_name (id);
12789 arg = build_address (decl);
12791 cleanup = cp_build_function_call (fn, build_tree_list (NULL_TREE,
12793 tf_warning_or_error);
12795 /* Handle ordinary C++ destructors. */
12796 type = TREE_TYPE (decl);
12797 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
12799 int flags = LOOKUP_NORMAL|LOOKUP_DESTRUCTOR;
12800 bool has_vbases = (TREE_CODE (type) == RECORD_TYPE
12801 && CLASSTYPE_VBASECLASSES (type));
12805 if (TREE_CODE (type) == ARRAY_TYPE)
12808 addr = build_address (decl);
12810 /* Optimize for space over speed here. */
12811 if (!has_vbases || flag_expensive_optimizations)
12812 flags |= LOOKUP_NONVIRTUAL;
12814 call = build_delete (TREE_TYPE (addr), addr,
12815 sfk_complete_destructor, flags, 0);
12817 cleanup = build_compound_expr (input_location, cleanup, call);
12825 /* When a stmt has been parsed, this function is called. */
12832 /* Return the FUNCTION_TYPE that corresponds to MEMFNTYPE, which can be a
12833 FUNCTION_DECL, METHOD_TYPE, FUNCTION_TYPE, pointer or reference to
12834 METHOD_TYPE or FUNCTION_TYPE, or pointer to member function. */
12837 static_fn_type (tree memfntype)
12843 if (TYPE_PTRMEMFUNC_P (memfntype))
12844 memfntype = TYPE_PTRMEMFUNC_FN_TYPE (memfntype);
12845 if (POINTER_TYPE_P (memfntype)
12846 || TREE_CODE (memfntype) == FUNCTION_DECL)
12847 memfntype = TREE_TYPE (memfntype);
12848 if (TREE_CODE (memfntype) == FUNCTION_TYPE)
12850 gcc_assert (TREE_CODE (memfntype) == METHOD_TYPE);
12851 args = TYPE_ARG_TYPES (memfntype);
12852 fntype = build_function_type (TREE_TYPE (memfntype), TREE_CHAIN (args));
12853 quals = cp_type_quals (TREE_TYPE (TREE_VALUE (args)));
12854 fntype = build_qualified_type (fntype, quals);
12855 fntype = (cp_build_type_attribute_variant
12856 (fntype, TYPE_ATTRIBUTES (memfntype)));
12857 fntype = (build_exception_variant
12858 (fntype, TYPE_RAISES_EXCEPTIONS (memfntype)));
12862 /* DECL was originally constructed as a non-static member function,
12863 but turned out to be static. Update it accordingly. */
12866 revert_static_member_fn (tree decl)
12868 TREE_TYPE (decl) = static_fn_type (decl);
12870 if (cp_type_quals (TREE_TYPE (decl)) != TYPE_UNQUALIFIED)
12871 error ("static member function %q#D declared with type qualifiers", decl);
12873 if (DECL_ARGUMENTS (decl))
12874 DECL_ARGUMENTS (decl) = TREE_CHAIN (DECL_ARGUMENTS (decl));
12875 DECL_STATIC_FUNCTION_P (decl) = 1;
12878 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
12879 one of the language-independent trees. */
12881 enum cp_tree_node_structure_enum
12882 cp_tree_node_structure (union lang_tree_node * t)
12884 switch (TREE_CODE (&t->generic))
12886 case DEFAULT_ARG: return TS_CP_DEFAULT_ARG;
12887 case IDENTIFIER_NODE: return TS_CP_IDENTIFIER;
12888 case OVERLOAD: return TS_CP_OVERLOAD;
12889 case TEMPLATE_PARM_INDEX: return TS_CP_TPI;
12890 case PTRMEM_CST: return TS_CP_PTRMEM;
12891 case BASELINK: return TS_CP_BASELINK;
12892 case STATIC_ASSERT: return TS_CP_STATIC_ASSERT;
12893 case ARGUMENT_PACK_SELECT: return TS_CP_ARGUMENT_PACK_SELECT;
12894 case TRAIT_EXPR: return TS_CP_TRAIT_EXPR;
12895 case LAMBDA_EXPR: return TS_CP_LAMBDA_EXPR;
12896 case TEMPLATE_INFO: return TS_CP_TEMPLATE_INFO;
12897 default: return TS_CP_GENERIC;
12901 /* Build the void_list_node (void_type_node having been created). */
12903 build_void_list_node (void)
12905 tree t = build_tree_list (NULL_TREE, void_type_node);
12910 cp_missing_noreturn_ok_p (tree decl)
12912 /* A missing noreturn is ok for the `main' function. */
12913 return DECL_MAIN_P (decl);
12916 /* Return the COMDAT group into which DECL should be placed. */
12919 cxx_comdat_group (tree decl)
12923 /* Virtual tables, construction virtual tables, and virtual table
12924 tables all go in a single COMDAT group, named after the primary
12926 if (TREE_CODE (decl) == VAR_DECL && DECL_VTABLE_OR_VTT_P (decl))
12927 name = DECL_ASSEMBLER_NAME (CLASSTYPE_VTABLES (DECL_CONTEXT (decl)));
12928 /* For all other DECLs, the COMDAT group is the mangled name of the
12929 declaration itself. */
12932 while (DECL_THUNK_P (decl))
12934 /* If TARGET_USE_LOCAL_THUNK_ALIAS_P, use_thunk puts the thunk
12935 into the same section as the target function. In that case
12936 we must return target's name. */
12937 tree target = THUNK_TARGET (decl);
12938 if (TARGET_USE_LOCAL_THUNK_ALIAS_P (target)
12939 && DECL_SECTION_NAME (target) != NULL
12940 && DECL_ONE_ONLY (target))
12945 name = DECL_ASSEMBLER_NAME (decl);
12951 #include "gt-cp-decl.h"