1 /* Process declarations and variables for C++ compiler.
2 Copyright (C) 1988, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
3 2001, 2002, 2003, 2004, 2005, 2006, 2007 Free Software Foundation, Inc.
4 Contributed by Michael Tiemann (tiemann@cygnus.com)
6 This file is part of GCC.
8 GCC is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3, or (at your option)
13 GCC is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING3. If not see
20 <http://www.gnu.org/licenses/>. */
23 /* Process declarations and symbol lookup for C++ front end.
24 Also constructs types; the standard scalar types at initialization,
25 and structure, union, array and enum types when they are declared. */
27 /* ??? not all decl nodes are given the most useful possible
28 line numbers. For example, the CONST_DECLs for enum values. */
32 #include "coretypes.h"
39 #include "tree-inline.h"
49 #include "diagnostic.h"
53 #include "tree-flow.h"
54 #include "pointer-set.h"
56 static tree grokparms (cp_parameter_declarator *, tree *);
57 static const char *redeclaration_error_message (tree, tree);
59 static int decl_jump_unsafe (tree);
60 static void require_complete_types_for_parms (tree);
61 static int ambi_op_p (enum tree_code);
62 static int unary_op_p (enum tree_code);
63 static void push_local_name (tree);
64 static tree grok_reference_init (tree, tree, tree, tree *);
65 static tree grokvardecl (tree, tree, const cp_decl_specifier_seq *,
67 static void record_unknown_type (tree, const char *);
68 static tree builtin_function_1 (tree, tree);
69 static tree build_library_fn_1 (tree, enum tree_code, tree);
70 static int member_function_or_else (tree, tree, enum overload_flags);
71 static void bad_specifiers (tree, const char *, int, int, int, int,
73 static void check_for_uninitialized_const_var (tree);
74 static hashval_t typename_hash (const void *);
75 static int typename_compare (const void *, const void *);
76 static tree local_variable_p_walkfn (tree *, int *, void *);
77 static tree record_builtin_java_type (const char *, int);
78 static const char *tag_name (enum tag_types);
79 static tree lookup_and_check_tag (enum tag_types, tree, tag_scope, bool);
80 static int walk_namespaces_r (tree, walk_namespaces_fn, void *);
81 static void maybe_deduce_size_from_array_init (tree, tree);
82 static void layout_var_decl (tree);
83 static void maybe_commonize_var (tree);
84 static tree check_initializer (tree, tree, int, tree *);
85 static void make_rtl_for_nonlocal_decl (tree, tree, const char *);
86 static void save_function_data (tree);
87 static void check_function_type (tree, tree);
88 static void finish_constructor_body (void);
89 static void begin_destructor_body (void);
90 static void finish_destructor_body (void);
91 static tree create_array_type_for_decl (tree, tree, tree);
92 static tree get_atexit_node (void);
93 static tree get_dso_handle_node (void);
94 static tree start_cleanup_fn (void);
95 static void end_cleanup_fn (void);
96 static tree cp_make_fname_decl (tree, int);
97 static void initialize_predefined_identifiers (void);
98 static tree check_special_function_return_type
99 (special_function_kind, tree, tree);
100 static tree push_cp_library_fn (enum tree_code, tree);
101 static tree build_cp_library_fn (tree, enum tree_code, tree);
102 static void store_parm_decls (tree);
103 static void initialize_local_var (tree, tree);
104 static void expand_static_init (tree, tree);
105 static tree next_initializable_field (tree);
107 /* The following symbols are subsumed in the cp_global_trees array, and
108 listed here individually for documentation purposes.
111 tree wchar_decl_node;
113 tree vtable_entry_type;
114 tree delta_type_node;
115 tree __t_desc_type_node;
117 tree class_type_node;
118 tree unknown_type_node;
120 Array type `vtable_entry_type[]'
123 tree vtbl_ptr_type_node;
130 A FUNCTION_DECL which can call `abort'. Not necessarily the
131 one that the user will declare, but sufficient to be called
132 by routines that want to abort the program.
136 The FUNCTION_DECL for the default `::operator delete'.
138 tree global_delete_fndecl;
141 tree type_info_type_node, tinfo_decl_id, tinfo_decl_type;
142 tree tinfo_var_id; */
144 tree cp_global_trees[CPTI_MAX];
146 /* Indicates that there is a type value in some namespace, although
147 that is not necessarily in scope at the moment. */
149 tree global_type_node;
151 /* The node that holds the "name" of the global scope. */
152 tree global_scope_name;
154 #define local_names cp_function_chain->x_local_names
156 /* A list of objects which have constructors or destructors
157 which reside in the global scope. The decl is stored in
158 the TREE_VALUE slot and the initializer is stored
159 in the TREE_PURPOSE slot. */
160 tree static_aggregates;
164 /* A node for the integer constants 2, and 3. */
166 tree integer_two_node, integer_three_node;
168 /* Used only for jumps to as-yet undefined labels, since jumps to
169 defined labels can have their validity checked immediately. */
171 struct named_label_use_entry GTY(())
173 struct named_label_use_entry *next;
174 /* The binding level to which this entry is *currently* attached.
175 This is initially the binding level in which the goto appeared,
176 but is modified as scopes are closed. */
177 struct cp_binding_level *binding_level;
178 /* The head of the names list that was current when the goto appeared,
179 or the inner scope popped. These are the decls that will *not* be
180 skipped when jumping to the label. */
182 /* The location of the goto, for error reporting. */
183 location_t o_goto_locus;
184 /* True if an OpenMP structured block scope has been closed since
185 the goto appeared. This means that the branch from the label will
186 illegally exit an OpenMP scope. */
190 /* A list of all LABEL_DECLs in the function that have names. Here so
191 we can clear out their names' definitions at the end of the
192 function, and so we can check the validity of jumps to these labels. */
194 struct named_label_entry GTY(())
196 /* The decl itself. */
199 /* The binding level to which the label is *currently* attached.
200 This is initially set to the binding level in which the label
201 is defined, but is modified as scopes are closed. */
202 struct cp_binding_level *binding_level;
203 /* The head of the names list that was current when the label was
204 defined, or the inner scope popped. These are the decls that will
205 be skipped when jumping to the label. */
207 /* A tree list of all decls from all binding levels that would be
208 crossed by a backward branch to the label. */
211 /* A list of uses of the label, before the label is defined. */
212 struct named_label_use_entry *uses;
214 /* The following bits are set after the label is defined, and are
215 updated as scopes are popped. They indicate that a backward jump
216 to the label will illegally enter a scope of the given flavor. */
222 #define named_labels cp_function_chain->x_named_labels
224 /* The number of function bodies which we are currently processing.
225 (Zero if we are at namespace scope, one inside the body of a
226 function, two inside the body of a function in a local class, etc.) */
229 /* States indicating how grokdeclarator() should handle declspecs marked
230 with __attribute__((deprecated)). An object declared as
231 __attribute__((deprecated)) suppresses warnings of uses of other
234 enum deprecated_states {
239 static enum deprecated_states deprecated_state = DEPRECATED_NORMAL;
242 /* A TREE_LIST of VAR_DECLs. The TREE_PURPOSE is a RECORD_TYPE or
243 UNION_TYPE; the TREE_VALUE is a VAR_DECL with that type. At the
244 time the VAR_DECL was declared, the type was incomplete. */
246 static GTY(()) tree incomplete_vars;
248 /* Returns the kind of template specialization we are currently
249 processing, given that it's declaration contained N_CLASS_SCOPES
250 explicit scope qualifications. */
253 current_tmpl_spec_kind (int n_class_scopes)
255 int n_template_parm_scopes = 0;
256 int seen_specialization_p = 0;
257 int innermost_specialization_p = 0;
258 struct cp_binding_level *b;
260 /* Scan through the template parameter scopes. */
261 for (b = current_binding_level;
262 b->kind == sk_template_parms;
265 /* If we see a specialization scope inside a parameter scope,
266 then something is wrong. That corresponds to a declaration
269 template <class T> template <> ...
271 which is always invalid since [temp.expl.spec] forbids the
272 specialization of a class member template if the enclosing
273 class templates are not explicitly specialized as well. */
274 if (b->explicit_spec_p)
276 if (n_template_parm_scopes == 0)
277 innermost_specialization_p = 1;
279 seen_specialization_p = 1;
281 else if (seen_specialization_p == 1)
282 return tsk_invalid_member_spec;
284 ++n_template_parm_scopes;
287 /* Handle explicit instantiations. */
288 if (processing_explicit_instantiation)
290 if (n_template_parm_scopes != 0)
291 /* We've seen a template parameter list during an explicit
292 instantiation. For example:
294 template <class T> template void f(int);
296 This is erroneous. */
297 return tsk_invalid_expl_inst;
299 return tsk_expl_inst;
302 if (n_template_parm_scopes < n_class_scopes)
303 /* We've not seen enough template headers to match all the
304 specialized classes present. For example:
306 template <class T> void R<T>::S<T>::f(int);
308 This is invalid; there needs to be one set of template
309 parameters for each class. */
310 return tsk_insufficient_parms;
311 else if (n_template_parm_scopes == n_class_scopes)
312 /* We're processing a non-template declaration (even though it may
313 be a member of a template class.) For example:
315 template <class T> void S<T>::f(int);
317 The `class T' maches the `S<T>', leaving no template headers
318 corresponding to the `f'. */
320 else if (n_template_parm_scopes > n_class_scopes + 1)
321 /* We've got too many template headers. For example:
323 template <> template <class T> void f (T);
325 There need to be more enclosing classes. */
326 return tsk_excessive_parms;
328 /* This must be a template. It's of the form:
330 template <class T> template <class U> void S<T>::f(U);
332 This is a specialization if the innermost level was a
333 specialization; otherwise it's just a definition of the
335 return innermost_specialization_p ? tsk_expl_spec : tsk_template;
338 /* Exit the current scope. */
346 /* When a label goes out of scope, check to see if that label was used
347 in a valid manner, and issue any appropriate warnings or errors. */
350 pop_label (tree label, tree old_value)
352 if (!processing_template_decl)
354 if (DECL_INITIAL (label) == NULL_TREE)
358 error ("label %q+D used but not defined", label);
359 #ifdef USE_MAPPED_LOCATION
360 location = input_location; /* FIXME want (input_filename, (line)0) */
362 location.file = input_filename;
365 /* Avoid crashing later. */
366 define_label (location, DECL_NAME (label));
369 warn_for_unused_label (label);
372 SET_IDENTIFIER_LABEL_VALUE (DECL_NAME (label), old_value);
375 /* At the end of a function, all labels declared within the function
376 go out of scope. BLOCK is the top-level block for the
380 pop_labels_1 (void **slot, void *data)
382 struct named_label_entry *ent = (struct named_label_entry *) *slot;
383 tree block = (tree) data;
385 pop_label (ent->label_decl, NULL_TREE);
387 /* Put the labels into the "variables" of the top-level block,
388 so debugger can see them. */
389 TREE_CHAIN (ent->label_decl) = BLOCK_VARS (block);
390 BLOCK_VARS (block) = ent->label_decl;
392 htab_clear_slot (named_labels, slot);
398 pop_labels (tree block)
402 htab_traverse (named_labels, pop_labels_1, block);
407 /* At the end of a block with local labels, restore the outer definition. */
410 pop_local_label (tree label, tree old_value)
412 struct named_label_entry dummy;
415 pop_label (label, old_value);
417 dummy.label_decl = label;
418 slot = htab_find_slot (named_labels, &dummy, NO_INSERT);
419 htab_clear_slot (named_labels, slot);
422 /* The following two routines are used to interface to Objective-C++.
423 The binding level is purposely treated as an opaque type. */
426 objc_get_current_scope (void)
428 return current_binding_level;
431 /* The following routine is used by the NeXT-style SJLJ exceptions;
432 variables get marked 'volatile' so as to not be clobbered by
433 _setjmp()/_longjmp() calls. All variables in the current scope,
434 as well as parent scopes up to (but not including) ENCLOSING_BLK
435 shall be thusly marked. */
438 objc_mark_locals_volatile (void *enclosing_blk)
440 struct cp_binding_level *scope;
442 for (scope = current_binding_level;
443 scope && scope != enclosing_blk;
444 scope = scope->level_chain)
448 for (decl = scope->names; decl; decl = TREE_CHAIN (decl))
449 objc_volatilize_decl (decl);
451 /* Do not climb up past the current function. */
452 if (scope->kind == sk_function_parms)
457 /* Update data for defined and undefined labels when leaving a scope. */
460 poplevel_named_label_1 (void **slot, void *data)
462 struct named_label_entry *ent = (struct named_label_entry *) *slot;
463 struct cp_binding_level *bl = (struct cp_binding_level *) data;
464 struct cp_binding_level *obl = bl->level_chain;
466 if (ent->binding_level == bl)
470 for (decl = ent->names_in_scope; decl; decl = TREE_CHAIN (decl))
471 if (decl_jump_unsafe (decl))
472 ent->bad_decls = tree_cons (NULL, decl, ent->bad_decls);
474 ent->binding_level = obl;
475 ent->names_in_scope = obl->names;
479 ent->in_try_scope = true;
482 ent->in_catch_scope = true;
485 ent->in_omp_scope = true;
493 struct named_label_use_entry *use;
495 for (use = ent->uses; use ; use = use->next)
496 if (use->binding_level == bl)
498 use->binding_level = obl;
499 use->names_in_scope = obl->names;
500 if (bl->kind == sk_omp)
501 use->in_omp_scope = true;
508 /* Exit a binding level.
509 Pop the level off, and restore the state of the identifier-decl mappings
510 that were in effect when this level was entered.
512 If KEEP == 1, this level had explicit declarations, so
513 and create a "block" (a BLOCK node) for the level
514 to record its declarations and subblocks for symbol table output.
516 If FUNCTIONBODY is nonzero, this level is the body of a function,
517 so create a block as if KEEP were set and also clear out all
520 If REVERSE is nonzero, reverse the order of decls before putting
521 them into the BLOCK. */
524 poplevel (int keep, int reverse, int functionbody)
527 /* The chain of decls was accumulated in reverse order.
528 Put it into forward order, just for cleanliness. */
530 int tmp = functionbody;
531 int real_functionbody;
535 int leaving_for_scope;
538 timevar_push (TV_NAME_LOOKUP);
543 gcc_assert (current_binding_level->kind != sk_class);
545 real_functionbody = (current_binding_level->kind == sk_cleanup
546 ? ((functionbody = 0), tmp) : functionbody);
547 subblocks = functionbody >= 0 ? current_binding_level->blocks : 0;
549 gcc_assert (!VEC_length(cp_class_binding,
550 current_binding_level->class_shadowed));
552 /* We used to use KEEP == 2 to indicate that the new block should go
553 at the beginning of the list of blocks at this binding level,
554 rather than the end. This hack is no longer used. */
555 gcc_assert (keep == 0 || keep == 1);
557 if (current_binding_level->keep)
560 /* Any uses of undefined labels, and any defined labels, now operate
561 under constraints of next binding contour. */
562 if (cfun && !functionbody && named_labels)
563 htab_traverse (named_labels, poplevel_named_label_1,
564 current_binding_level);
566 /* Get the decls in the order they were written.
567 Usually current_binding_level->names is in reverse order.
568 But parameter decls were previously put in forward order. */
571 current_binding_level->names
572 = decls = nreverse (current_binding_level->names);
574 decls = current_binding_level->names;
576 /* If there were any declarations or structure tags in that level,
577 or if this level is a function body,
578 create a BLOCK to record them for the life of this function. */
580 if (keep == 1 || functionbody)
581 block = make_node (BLOCK);
582 if (block != NULL_TREE)
584 BLOCK_VARS (block) = decls;
585 BLOCK_SUBBLOCKS (block) = subblocks;
588 /* In each subblock, record that this is its superior. */
590 for (link = subblocks; link; link = BLOCK_CHAIN (link))
591 BLOCK_SUPERCONTEXT (link) = block;
593 /* We still support the old for-scope rules, whereby the variables
594 in a for-init statement were in scope after the for-statement
595 ended. We only use the new rules if flag_new_for_scope is
598 = current_binding_level->kind == sk_for && flag_new_for_scope == 1;
600 /* Before we remove the declarations first check for unused variables. */
601 if (warn_unused_variable
602 && !processing_template_decl)
603 for (decl = getdecls (); decl; decl = TREE_CHAIN (decl))
604 if (TREE_CODE (decl) == VAR_DECL
605 && ! TREE_USED (decl)
606 && ! DECL_IN_SYSTEM_HEADER (decl)
607 && DECL_NAME (decl) && ! DECL_ARTIFICIAL (decl))
608 warning (OPT_Wunused_variable, "unused variable %q+D", decl);
610 /* Remove declarations for all the DECLs in this level. */
611 for (link = decls; link; link = TREE_CHAIN (link))
613 if (leaving_for_scope && TREE_CODE (link) == VAR_DECL
616 tree name = DECL_NAME (link);
620 ob = outer_binding (name,
621 IDENTIFIER_BINDING (name),
624 ns_binding = IDENTIFIER_NAMESPACE_VALUE (name);
626 ns_binding = NULL_TREE;
628 if (ob && ob->scope == current_binding_level->level_chain)
629 /* We have something like:
634 and we are leaving the `for' scope. There's no reason to
635 keep the binding of the inner `i' in this case. */
636 pop_binding (name, link);
637 else if ((ob && (TREE_CODE (ob->value) == TYPE_DECL))
638 || (ns_binding && TREE_CODE (ns_binding) == TYPE_DECL))
639 /* Here, we have something like:
647 We must pop the for-scope binding so we know what's a
648 type and what isn't. */
649 pop_binding (name, link);
652 /* Mark this VAR_DECL as dead so that we can tell we left it
653 there only for backward compatibility. */
654 DECL_DEAD_FOR_LOCAL (link) = 1;
656 /* Keep track of what should have happened when we
657 popped the binding. */
660 SET_DECL_SHADOWED_FOR_VAR (link, ob->value);
661 DECL_HAS_SHADOWED_FOR_VAR_P (link) = 1;
664 /* Add it to the list of dead variables in the next
665 outermost binding to that we can remove these when we
666 leave that binding. */
667 current_binding_level->level_chain->dead_vars_from_for
668 = tree_cons (NULL_TREE, link,
669 current_binding_level->level_chain->
672 /* Although we don't pop the cxx_binding, we do clear
673 its SCOPE since the scope is going away now. */
674 IDENTIFIER_BINDING (name)->scope
675 = current_binding_level->level_chain;
682 /* Remove the binding. */
685 if (TREE_CODE (decl) == TREE_LIST)
686 decl = TREE_VALUE (decl);
689 if (TREE_CODE (name) == OVERLOAD)
690 name = OVL_FUNCTION (name);
692 gcc_assert (DECL_P (name));
693 pop_binding (DECL_NAME (name), decl);
697 /* Remove declarations for any `for' variables from inner scopes
698 that we kept around. */
699 for (link = current_binding_level->dead_vars_from_for;
700 link; link = TREE_CHAIN (link))
701 pop_binding (DECL_NAME (TREE_VALUE (link)), TREE_VALUE (link));
703 /* Restore the IDENTIFIER_TYPE_VALUEs. */
704 for (link = current_binding_level->type_shadowed;
705 link; link = TREE_CHAIN (link))
706 SET_IDENTIFIER_TYPE_VALUE (TREE_PURPOSE (link), TREE_VALUE (link));
708 /* Restore the IDENTIFIER_LABEL_VALUEs for local labels. */
709 for (link = current_binding_level->shadowed_labels;
711 link = TREE_CHAIN (link))
712 pop_local_label (TREE_VALUE (link), TREE_PURPOSE (link));
714 /* There may be OVERLOADs (wrapped in TREE_LISTs) on the BLOCK_VARs
715 list if a `using' declaration put them there. The debugging
716 back ends won't understand OVERLOAD, so we remove them here.
717 Because the BLOCK_VARS are (temporarily) shared with
718 CURRENT_BINDING_LEVEL->NAMES we must do this fixup after we have
719 popped all the bindings. */
724 for (d = &BLOCK_VARS (block); *d; )
726 if (TREE_CODE (*d) == TREE_LIST)
727 *d = TREE_CHAIN (*d);
729 d = &TREE_CHAIN (*d);
733 /* If the level being exited is the top level of a function,
734 check over all the labels. */
737 /* Since this is the top level block of a function, the vars are
738 the function's parameters. Don't leave them in the BLOCK
739 because they are found in the FUNCTION_DECL instead. */
740 BLOCK_VARS (block) = 0;
744 kind = current_binding_level->kind;
745 if (kind == sk_cleanup)
749 /* If this is a temporary binding created for a cleanup, then we'll
750 have pushed a statement list level. Pop that, create a new
751 BIND_EXPR for the block, and insert it into the stream. */
752 stmt = pop_stmt_list (current_binding_level->statement_list);
753 stmt = c_build_bind_expr (block, stmt);
760 /* The current function is being defined, so its DECL_INITIAL
761 should be error_mark_node. */
762 gcc_assert (DECL_INITIAL (current_function_decl) == error_mark_node);
763 DECL_INITIAL (current_function_decl) = block;
766 current_binding_level->blocks
767 = chainon (current_binding_level->blocks, block);
769 /* If we did not make a block for the level just exited,
770 any blocks made for inner levels
771 (since they cannot be recorded as subblocks in that level)
772 must be carried forward so they will later become subblocks
773 of something else. */
775 current_binding_level->blocks
776 = chainon (current_binding_level->blocks, subblocks);
778 /* Each and every BLOCK node created here in `poplevel' is important
779 (e.g. for proper debugging information) so if we created one
780 earlier, mark it as "used". */
782 TREE_USED (block) = 1;
784 /* All temporary bindings created for cleanups are popped silently. */
785 if (kind == sk_cleanup)
788 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, block);
791 /* Insert BLOCK at the end of the list of subblocks of the
792 current binding level. This is used when a BIND_EXPR is expanded,
793 to handle the BLOCK node inside the BIND_EXPR. */
796 insert_block (tree block)
798 TREE_USED (block) = 1;
799 current_binding_level->blocks
800 = chainon (current_binding_level->blocks, block);
803 /* Walk all the namespaces contained NAMESPACE, including NAMESPACE
804 itself, calling F for each. The DATA is passed to F as well. */
807 walk_namespaces_r (tree namespace, walk_namespaces_fn f, void* data)
810 tree current = NAMESPACE_LEVEL (namespace)->namespaces;
812 result |= (*f) (namespace, data);
814 for (; current; current = TREE_CHAIN (current))
815 result |= walk_namespaces_r (current, f, data);
820 /* Walk all the namespaces, calling F for each. The DATA is passed to
824 walk_namespaces (walk_namespaces_fn f, void* data)
826 return walk_namespaces_r (global_namespace, f, data);
829 /* Call wrapup_globals_declarations for the globals in NAMESPACE. If
830 DATA is non-NULL, this is the last time we will call
831 wrapup_global_declarations for this NAMESPACE. */
834 wrapup_globals_for_namespace (tree namespace, void* data)
836 struct cp_binding_level *level = NAMESPACE_LEVEL (namespace);
837 VEC(tree,gc) *statics = level->static_decls;
838 tree *vec = VEC_address (tree, statics);
839 int len = VEC_length (tree, statics);
840 int last_time = (data != 0);
844 check_global_declarations (vec, len);
845 emit_debug_global_declarations (vec, len);
849 /* Write out any globals that need to be output. */
850 return wrapup_global_declarations (vec, len);
854 /* In C++, you don't have to write `struct S' to refer to `S'; you
855 can just use `S'. We accomplish this by creating a TYPE_DECL as
856 if the user had written `typedef struct S S'. Create and return
857 the TYPE_DECL for TYPE. */
860 create_implicit_typedef (tree name, tree type)
864 decl = build_decl (TYPE_DECL, name, type);
865 DECL_ARTIFICIAL (decl) = 1;
866 /* There are other implicit type declarations, like the one *within*
867 a class that allows you to write `S::S'. We must distinguish
869 SET_DECL_IMPLICIT_TYPEDEF_P (decl);
870 TYPE_NAME (type) = decl;
875 /* Remember a local name for name-mangling purposes. */
878 push_local_name (tree decl)
883 timevar_push (TV_NAME_LOOKUP);
885 name = DECL_NAME (decl);
887 nelts = VEC_length (tree, local_names);
888 for (i = 0; i < nelts; i++)
890 t = VEC_index (tree, local_names, i);
891 if (DECL_NAME (t) == name)
893 if (!DECL_LANG_SPECIFIC (decl))
894 retrofit_lang_decl (decl);
895 DECL_LANG_SPECIFIC (decl)->decl_flags.u2sel = 1;
896 if (DECL_LANG_SPECIFIC (t))
897 DECL_DISCRIMINATOR (decl) = DECL_DISCRIMINATOR (t) + 1;
899 DECL_DISCRIMINATOR (decl) = 1;
901 VEC_replace (tree, local_names, i, decl);
902 timevar_pop (TV_NAME_LOOKUP);
907 VEC_safe_push (tree, gc, local_names, decl);
908 timevar_pop (TV_NAME_LOOKUP);
911 /* Subroutine of duplicate_decls: return truthvalue of whether
912 or not types of these decls match.
914 For C++, we must compare the parameter list so that `int' can match
915 `int&' in a parameter position, but `int&' is not confused with
919 decls_match (tree newdecl, tree olddecl)
923 if (newdecl == olddecl)
926 if (TREE_CODE (newdecl) != TREE_CODE (olddecl))
927 /* If the two DECLs are not even the same kind of thing, we're not
928 interested in their types. */
931 if (TREE_CODE (newdecl) == FUNCTION_DECL)
933 tree f1 = TREE_TYPE (newdecl);
934 tree f2 = TREE_TYPE (olddecl);
935 tree p1 = TYPE_ARG_TYPES (f1);
936 tree p2 = TYPE_ARG_TYPES (f2);
938 if (CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl)
939 && ! (DECL_EXTERN_C_P (newdecl)
940 && DECL_EXTERN_C_P (olddecl)))
943 if (TREE_CODE (f1) != TREE_CODE (f2))
946 if (same_type_p (TREE_TYPE (f1), TREE_TYPE (f2)))
948 if (p2 == NULL_TREE && DECL_EXTERN_C_P (olddecl)
949 && (DECL_BUILT_IN (olddecl)
950 #ifndef NO_IMPLICIT_EXTERN_C
951 || (DECL_IN_SYSTEM_HEADER (newdecl) && !DECL_CLASS_SCOPE_P (newdecl))
952 || (DECL_IN_SYSTEM_HEADER (olddecl) && !DECL_CLASS_SCOPE_P (olddecl))
956 types_match = self_promoting_args_p (p1);
957 if (p1 == void_list_node)
958 TREE_TYPE (newdecl) = TREE_TYPE (olddecl);
960 #ifndef NO_IMPLICIT_EXTERN_C
961 else if (p1 == NULL_TREE
962 && (DECL_EXTERN_C_P (olddecl)
963 && DECL_IN_SYSTEM_HEADER (olddecl)
964 && !DECL_CLASS_SCOPE_P (olddecl))
965 && (DECL_EXTERN_C_P (newdecl)
966 && DECL_IN_SYSTEM_HEADER (newdecl)
967 && !DECL_CLASS_SCOPE_P (newdecl)))
969 types_match = self_promoting_args_p (p2);
970 TREE_TYPE (newdecl) = TREE_TYPE (olddecl);
974 types_match = compparms (p1, p2);
979 else if (TREE_CODE (newdecl) == TEMPLATE_DECL)
981 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl))
982 != TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)))
985 if (!comp_template_parms (DECL_TEMPLATE_PARMS (newdecl),
986 DECL_TEMPLATE_PARMS (olddecl)))
989 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
990 types_match = same_type_p (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl)),
991 TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl)));
993 types_match = decls_match (DECL_TEMPLATE_RESULT (olddecl),
994 DECL_TEMPLATE_RESULT (newdecl));
998 /* Need to check scope for variable declaration (VAR_DECL).
999 For typedef (TYPE_DECL), scope is ignored. */
1000 if (TREE_CODE (newdecl) == VAR_DECL
1001 && CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl)
1003 Two declarations for an object with C language linkage
1004 with the same name (ignoring the namespace that qualify
1005 it) that appear in different namespace scopes refer to
1007 && !(DECL_EXTERN_C_P (olddecl) && DECL_EXTERN_C_P (newdecl)))
1010 if (TREE_TYPE (newdecl) == error_mark_node)
1011 types_match = TREE_TYPE (olddecl) == error_mark_node;
1012 else if (TREE_TYPE (olddecl) == NULL_TREE)
1013 types_match = TREE_TYPE (newdecl) == NULL_TREE;
1014 else if (TREE_TYPE (newdecl) == NULL_TREE)
1017 types_match = comptypes (TREE_TYPE (newdecl),
1018 TREE_TYPE (olddecl),
1019 COMPARE_REDECLARATION);
1025 /* If NEWDECL is `static' and an `extern' was seen previously,
1026 warn about it. OLDDECL is the previous declaration.
1028 Note that this does not apply to the C++ case of declaring
1029 a variable `extern const' and then later `const'.
1031 Don't complain about built-in functions, since they are beyond
1032 the user's control. */
1035 warn_extern_redeclared_static (tree newdecl, tree olddecl)
1039 if (TREE_CODE (newdecl) == TYPE_DECL
1040 || TREE_CODE (newdecl) == TEMPLATE_DECL
1041 || TREE_CODE (newdecl) == CONST_DECL
1042 || TREE_CODE (newdecl) == NAMESPACE_DECL)
1045 /* Don't get confused by static member functions; that's a different
1047 if (TREE_CODE (newdecl) == FUNCTION_DECL
1048 && DECL_STATIC_FUNCTION_P (newdecl))
1051 /* If the old declaration was `static', or the new one isn't, then
1052 then everything is OK. */
1053 if (DECL_THIS_STATIC (olddecl) || !DECL_THIS_STATIC (newdecl))
1056 /* It's OK to declare a builtin function as `static'. */
1057 if (TREE_CODE (olddecl) == FUNCTION_DECL
1058 && DECL_ARTIFICIAL (olddecl))
1061 name = DECL_ASSEMBLER_NAME (newdecl);
1062 pedwarn ("%qD was declared %<extern%> and later %<static%>", newdecl);
1063 pedwarn ("previous declaration of %q+D", olddecl);
1066 /* NEW_DECL is a redeclaration of OLD_DECL; both are functions or
1067 function templates. If their exception specifications do not
1068 match, issue a diagnostic. */
1071 check_redeclaration_exception_specification (tree new_decl,
1076 tree new_exceptions;
1077 tree old_exceptions;
1079 new_type = TREE_TYPE (new_decl);
1080 new_exceptions = TYPE_RAISES_EXCEPTIONS (new_type);
1081 old_type = TREE_TYPE (old_decl);
1082 old_exceptions = TYPE_RAISES_EXCEPTIONS (old_type);
1086 If any declaration of a function has an exception-specification,
1087 all declarations, including the definition and an explicit
1088 specialization, of that function shall have an
1089 exception-specification with the same set of type-ids. */
1090 if ((pedantic || ! DECL_IN_SYSTEM_HEADER (old_decl))
1091 && ! DECL_IS_BUILTIN (old_decl)
1093 && !comp_except_specs (new_exceptions, old_exceptions,
1096 error ("declaration of %qF throws different exceptions", new_decl);
1097 error ("from previous declaration %q+F", old_decl);
1101 #define GNU_INLINE_P(fn) (DECL_DECLARED_INLINE_P (fn) \
1102 && lookup_attribute ("gnu_inline", \
1103 DECL_ATTRIBUTES (fn)))
1105 /* If NEWDECL is a redeclaration of OLDDECL, merge the declarations.
1106 If the redeclaration is invalid, a diagnostic is issued, and the
1107 error_mark_node is returned. Otherwise, OLDDECL is returned.
1109 If NEWDECL is not a redeclaration of OLDDECL, NULL_TREE is
1112 NEWDECL_IS_FRIEND is true if NEWDECL was declared as a friend. */
1115 duplicate_decls (tree newdecl, tree olddecl, bool newdecl_is_friend)
1117 unsigned olddecl_uid = DECL_UID (olddecl);
1118 int olddecl_friend = 0, types_match = 0, hidden_friend = 0;
1119 int new_defines_function = 0;
1122 if (newdecl == olddecl)
1125 types_match = decls_match (newdecl, olddecl);
1127 /* If either the type of the new decl or the type of the old decl is an
1128 error_mark_node, then that implies that we have already issued an
1129 error (earlier) for some bogus type specification, and in that case,
1130 it is rather pointless to harass the user with yet more error message
1131 about the same declaration, so just pretend the types match here. */
1132 if (TREE_TYPE (newdecl) == error_mark_node
1133 || TREE_TYPE (olddecl) == error_mark_node)
1134 return error_mark_node;
1136 if (DECL_P (olddecl)
1137 && TREE_CODE (newdecl) == FUNCTION_DECL
1138 && TREE_CODE (olddecl) == FUNCTION_DECL
1139 && (DECL_UNINLINABLE (newdecl) || DECL_UNINLINABLE (olddecl)))
1141 if (DECL_DECLARED_INLINE_P (newdecl)
1142 && DECL_UNINLINABLE (newdecl)
1143 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl)))
1144 /* Already warned elsewhere. */;
1145 else if (DECL_DECLARED_INLINE_P (olddecl)
1146 && DECL_UNINLINABLE (olddecl)
1147 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl)))
1148 /* Already warned. */;
1149 else if (DECL_DECLARED_INLINE_P (newdecl)
1150 && DECL_UNINLINABLE (olddecl)
1151 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl)))
1153 warning (OPT_Wattributes, "function %q+D redeclared as inline",
1155 warning (OPT_Wattributes, "previous declaration of %q+D "
1156 "with attribute noinline", olddecl);
1158 else if (DECL_DECLARED_INLINE_P (olddecl)
1159 && DECL_UNINLINABLE (newdecl)
1160 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl)))
1162 warning (OPT_Wattributes, "function %q+D redeclared with "
1163 "attribute noinline", newdecl);
1164 warning (OPT_Wattributes, "previous declaration of %q+D was inline",
1169 /* Check for redeclaration and other discrepancies. */
1170 if (TREE_CODE (olddecl) == FUNCTION_DECL
1171 && DECL_ARTIFICIAL (olddecl))
1173 gcc_assert (!DECL_HIDDEN_FRIEND_P (olddecl));
1174 if (TREE_CODE (newdecl) != FUNCTION_DECL)
1176 /* Avoid warnings redeclaring built-ins which have not been
1177 explicitly declared. */
1178 if (DECL_ANTICIPATED (olddecl))
1181 /* If you declare a built-in or predefined function name as static,
1182 the old definition is overridden, but optionally warn this was a
1183 bad choice of name. */
1184 if (! TREE_PUBLIC (newdecl))
1186 warning (OPT_Wshadow, "shadowing %s function %q#D",
1187 DECL_BUILT_IN (olddecl) ? "built-in" : "library",
1189 /* Discard the old built-in function. */
1192 /* If the built-in is not ansi, then programs can override
1193 it even globally without an error. */
1194 else if (! DECL_BUILT_IN (olddecl))
1195 warning (0, "library function %q#D redeclared as non-function %q#D",
1199 error ("declaration of %q#D", newdecl);
1200 error ("conflicts with built-in declaration %q#D",
1205 else if (!types_match)
1207 /* Avoid warnings redeclaring built-ins which have not been
1208 explicitly declared. */
1209 if (DECL_ANTICIPATED (olddecl))
1211 /* Deal with fileptr_type_node. FILE type is not known
1212 at the time we create the builtins. */
1215 for (t1 = TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1216 t2 = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1218 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2))
1221 else if (TREE_VALUE (t2) == fileptr_type_node)
1223 tree t = TREE_VALUE (t1);
1225 if (TREE_CODE (t) == POINTER_TYPE
1226 && TYPE_NAME (TREE_TYPE (t))
1227 && DECL_NAME (TYPE_NAME (TREE_TYPE (t)))
1228 == get_identifier ("FILE")
1229 && compparms (TREE_CHAIN (t1), TREE_CHAIN (t2)))
1231 tree oldargs = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1233 TYPE_ARG_TYPES (TREE_TYPE (olddecl))
1234 = TYPE_ARG_TYPES (TREE_TYPE (newdecl));
1235 types_match = decls_match (newdecl, olddecl);
1237 return duplicate_decls (newdecl, olddecl,
1239 TYPE_ARG_TYPES (TREE_TYPE (olddecl)) = oldargs;
1242 else if (! same_type_p (TREE_VALUE (t1), TREE_VALUE (t2)))
1245 else if ((DECL_EXTERN_C_P (newdecl)
1246 && DECL_EXTERN_C_P (olddecl))
1247 || compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1248 TYPE_ARG_TYPES (TREE_TYPE (olddecl))))
1250 /* A near match; override the builtin. */
1252 if (TREE_PUBLIC (newdecl))
1254 warning (0, "new declaration %q#D", newdecl);
1255 warning (0, "ambiguates built-in declaration %q#D",
1259 warning (OPT_Wshadow, "shadowing %s function %q#D",
1260 DECL_BUILT_IN (olddecl) ? "built-in" : "library",
1264 /* Discard the old built-in function. */
1267 /* Replace the old RTL to avoid problems with inlining. */
1268 COPY_DECL_RTL (newdecl, olddecl);
1270 /* Even if the types match, prefer the new declarations type for
1271 built-ins which have not been explicitly declared, for
1272 exception lists, etc... */
1273 else if (DECL_ANTICIPATED (olddecl))
1275 tree type = TREE_TYPE (newdecl);
1276 tree attribs = (*targetm.merge_type_attributes)
1277 (TREE_TYPE (olddecl), type);
1279 type = cp_build_type_attribute_variant (type, attribs);
1280 TREE_TYPE (newdecl) = TREE_TYPE (olddecl) = type;
1283 /* If a function is explicitly declared "throw ()", propagate that to
1284 the corresponding builtin. */
1285 if (DECL_BUILT_IN_CLASS (olddecl) == BUILT_IN_NORMAL
1286 && DECL_ANTICIPATED (olddecl)
1287 && TREE_NOTHROW (newdecl)
1288 && !TREE_NOTHROW (olddecl)
1289 && built_in_decls [DECL_FUNCTION_CODE (olddecl)] != NULL_TREE
1290 && built_in_decls [DECL_FUNCTION_CODE (olddecl)] != olddecl
1292 TREE_NOTHROW (built_in_decls [DECL_FUNCTION_CODE (olddecl)]) = 1;
1294 /* Whether or not the builtin can throw exceptions has no
1295 bearing on this declarator. */
1296 TREE_NOTHROW (olddecl) = 0;
1298 if (DECL_THIS_STATIC (newdecl) && !DECL_THIS_STATIC (olddecl))
1300 /* If a builtin function is redeclared as `static', merge
1301 the declarations, but make the original one static. */
1302 DECL_THIS_STATIC (olddecl) = 1;
1303 TREE_PUBLIC (olddecl) = 0;
1305 /* Make the old declaration consistent with the new one so
1306 that all remnants of the builtin-ness of this function
1307 will be banished. */
1308 SET_DECL_LANGUAGE (olddecl, DECL_LANGUAGE (newdecl));
1309 COPY_DECL_RTL (newdecl, olddecl);
1312 else if (TREE_CODE (olddecl) != TREE_CODE (newdecl))
1314 /* C++ Standard, 3.3, clause 4:
1315 "[Note: a namespace name or a class template name must be unique
1316 in its declarative region (7.3.2, clause 14). ]" */
1317 if (TREE_CODE (olddecl) != NAMESPACE_DECL
1318 && TREE_CODE (newdecl) != NAMESPACE_DECL
1319 && (TREE_CODE (olddecl) != TEMPLATE_DECL
1320 || TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) != TYPE_DECL)
1321 && (TREE_CODE (newdecl) != TEMPLATE_DECL
1322 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) != TYPE_DECL))
1324 if ((TREE_CODE (olddecl) == TYPE_DECL && DECL_ARTIFICIAL (olddecl)
1325 && TREE_CODE (newdecl) != TYPE_DECL)
1326 || (TREE_CODE (newdecl) == TYPE_DECL && DECL_ARTIFICIAL (newdecl)
1327 && TREE_CODE (olddecl) != TYPE_DECL))
1329 /* We do nothing special here, because C++ does such nasty
1330 things with TYPE_DECLs. Instead, just let the TYPE_DECL
1331 get shadowed, and know that if we need to find a TYPE_DECL
1332 for a given name, we can look in the IDENTIFIER_TYPE_VALUE
1333 slot of the identifier. */
1337 if ((TREE_CODE (newdecl) == FUNCTION_DECL
1338 && DECL_FUNCTION_TEMPLATE_P (olddecl))
1339 || (TREE_CODE (olddecl) == FUNCTION_DECL
1340 && DECL_FUNCTION_TEMPLATE_P (newdecl)))
1344 error ("%q#D redeclared as different kind of symbol", newdecl);
1345 if (TREE_CODE (olddecl) == TREE_LIST)
1346 olddecl = TREE_VALUE (olddecl);
1347 error ("previous declaration of %q+#D", olddecl);
1349 return error_mark_node;
1351 else if (!types_match)
1353 if (CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl))
1354 /* These are certainly not duplicate declarations; they're
1355 from different scopes. */
1358 if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1360 /* The name of a class template may not be declared to refer to
1361 any other template, class, function, object, namespace, value,
1362 or type in the same scope. */
1363 if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) == TYPE_DECL
1364 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
1366 error ("declaration of template %q#D", newdecl);
1367 error ("conflicts with previous declaration %q+#D", olddecl);
1369 else if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) == FUNCTION_DECL
1370 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == FUNCTION_DECL
1371 && compparms (TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl))),
1372 TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl))))
1373 && comp_template_parms (DECL_TEMPLATE_PARMS (newdecl),
1374 DECL_TEMPLATE_PARMS (olddecl))
1375 /* Template functions can be disambiguated by
1377 && same_type_p (TREE_TYPE (TREE_TYPE (newdecl)),
1378 TREE_TYPE (TREE_TYPE (olddecl))))
1380 error ("new declaration %q#D", newdecl);
1381 error ("ambiguates old declaration %q+#D", olddecl);
1385 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1387 if (DECL_EXTERN_C_P (newdecl) && DECL_EXTERN_C_P (olddecl))
1389 error ("declaration of C function %q#D conflicts with",
1391 error ("previous declaration %q+#D here", olddecl);
1393 else if (compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1394 TYPE_ARG_TYPES (TREE_TYPE (olddecl))))
1396 error ("new declaration %q#D", newdecl);
1397 error ("ambiguates old declaration %q+#D", olddecl);
1398 return error_mark_node;
1405 error ("conflicting declaration %q#D", newdecl);
1406 error ("%q+D has a previous declaration as %q#D", olddecl, olddecl);
1407 return error_mark_node;
1410 else if (TREE_CODE (newdecl) == FUNCTION_DECL
1411 && ((DECL_TEMPLATE_SPECIALIZATION (olddecl)
1412 && (!DECL_TEMPLATE_INFO (newdecl)
1413 || (DECL_TI_TEMPLATE (newdecl)
1414 != DECL_TI_TEMPLATE (olddecl))))
1415 || (DECL_TEMPLATE_SPECIALIZATION (newdecl)
1416 && (!DECL_TEMPLATE_INFO (olddecl)
1417 || (DECL_TI_TEMPLATE (olddecl)
1418 != DECL_TI_TEMPLATE (newdecl))))))
1419 /* It's OK to have a template specialization and a non-template
1420 with the same type, or to have specializations of two
1421 different templates with the same type. Note that if one is a
1422 specialization, and the other is an instantiation of the same
1423 template, that we do not exit at this point. That situation
1424 can occur if we instantiate a template class, and then
1425 specialize one of its methods. This situation is valid, but
1426 the declarations must be merged in the usual way. */
1428 else if (TREE_CODE (newdecl) == FUNCTION_DECL
1429 && ((DECL_TEMPLATE_INSTANTIATION (olddecl)
1430 && !DECL_USE_TEMPLATE (newdecl))
1431 || (DECL_TEMPLATE_INSTANTIATION (newdecl)
1432 && !DECL_USE_TEMPLATE (olddecl))))
1433 /* One of the declarations is a template instantiation, and the
1434 other is not a template at all. That's OK. */
1436 else if (TREE_CODE (newdecl) == NAMESPACE_DECL)
1438 /* In [namespace.alias] we have:
1440 In a declarative region, a namespace-alias-definition can be
1441 used to redefine a namespace-alias declared in that declarative
1442 region to refer only to the namespace to which it already
1445 Therefore, if we encounter a second alias directive for the same
1446 alias, we can just ignore the second directive. */
1447 if (DECL_NAMESPACE_ALIAS (newdecl)
1448 && (DECL_NAMESPACE_ALIAS (newdecl)
1449 == DECL_NAMESPACE_ALIAS (olddecl)))
1451 /* [namespace.alias]
1453 A namespace-name or namespace-alias shall not be declared as
1454 the name of any other entity in the same declarative region.
1455 A namespace-name defined at global scope shall not be
1456 declared as the name of any other entity in any global scope
1458 error ("declaration of namespace %qD conflicts with", newdecl);
1459 error ("previous declaration of namespace %q+D here", olddecl);
1460 return error_mark_node;
1464 const char *errmsg = redeclaration_error_message (newdecl, olddecl);
1467 error (errmsg, newdecl);
1468 if (DECL_NAME (olddecl) != NULL_TREE)
1469 error ((DECL_INITIAL (olddecl) && namespace_bindings_p ())
1470 ? "%q+#D previously defined here"
1471 : "%q+#D previously declared here", olddecl);
1472 return error_mark_node;
1474 else if (TREE_CODE (olddecl) == FUNCTION_DECL
1475 && DECL_INITIAL (olddecl) != NULL_TREE
1476 && TYPE_ARG_TYPES (TREE_TYPE (olddecl)) == NULL_TREE
1477 && TYPE_ARG_TYPES (TREE_TYPE (newdecl)) != NULL_TREE)
1479 /* Prototype decl follows defn w/o prototype. */
1480 warning (0, "prototype for %q+#D", newdecl);
1481 warning (0, "%Jfollows non-prototype definition here", olddecl);
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 pedwarn ("default argument given for parameter %d of %q#D",
1548 pedwarn ("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",
1559 if (DECL_DECLARED_INLINE_P (newdecl)
1560 && ! DECL_DECLARED_INLINE_P (olddecl)
1561 && TREE_ADDRESSABLE (olddecl) && warn_inline)
1563 warning (0, "%q#D was used before it was declared inline", newdecl);
1564 warning (0, "%Jprevious non-inline declaration here", olddecl);
1569 /* Do not merge an implicit typedef with an explicit one. In:
1573 typedef class A A __attribute__ ((foo));
1575 the attribute should apply only to the typedef. */
1576 if (TREE_CODE (olddecl) == TYPE_DECL
1577 && (DECL_IMPLICIT_TYPEDEF_P (olddecl)
1578 || DECL_IMPLICIT_TYPEDEF_P (newdecl)))
1581 /* If new decl is `static' and an `extern' was seen previously,
1583 warn_extern_redeclared_static (newdecl, olddecl);
1585 /* We have committed to returning 1 at this point. */
1586 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1588 /* Now that functions must hold information normally held
1589 by field decls, there is extra work to do so that
1590 declaration information does not get destroyed during
1592 if (DECL_VINDEX (olddecl))
1593 DECL_VINDEX (newdecl) = DECL_VINDEX (olddecl);
1594 if (DECL_CONTEXT (olddecl))
1595 DECL_CONTEXT (newdecl) = DECL_CONTEXT (olddecl);
1596 DECL_STATIC_CONSTRUCTOR (newdecl) |= DECL_STATIC_CONSTRUCTOR (olddecl);
1597 DECL_STATIC_DESTRUCTOR (newdecl) |= DECL_STATIC_DESTRUCTOR (olddecl);
1598 DECL_PURE_VIRTUAL_P (newdecl) |= DECL_PURE_VIRTUAL_P (olddecl);
1599 DECL_VIRTUAL_P (newdecl) |= DECL_VIRTUAL_P (olddecl);
1600 DECL_INVALID_OVERRIDER_P (newdecl) |= DECL_INVALID_OVERRIDER_P (olddecl);
1601 DECL_THIS_STATIC (newdecl) |= DECL_THIS_STATIC (olddecl);
1602 if (DECL_OVERLOADED_OPERATOR_P (olddecl) != ERROR_MARK)
1603 SET_OVERLOADED_OPERATOR_CODE
1604 (newdecl, DECL_OVERLOADED_OPERATOR_P (olddecl));
1605 new_defines_function = DECL_INITIAL (newdecl) != NULL_TREE;
1607 /* Optionally warn about more than one declaration for the same
1608 name, but don't warn about a function declaration followed by a
1610 if (warn_redundant_decls && ! DECL_ARTIFICIAL (olddecl)
1611 && !(new_defines_function && DECL_INITIAL (olddecl) == NULL_TREE)
1612 /* Don't warn about extern decl followed by definition. */
1613 && !(DECL_EXTERNAL (olddecl) && ! DECL_EXTERNAL (newdecl))
1614 /* Don't warn about friends, let add_friend take care of it. */
1615 && ! (newdecl_is_friend || DECL_FRIEND_P (olddecl)))
1617 warning (OPT_Wredundant_decls, "redundant redeclaration of %qD in same scope", newdecl);
1618 warning (OPT_Wredundant_decls, "previous declaration of %q+D", olddecl);
1622 /* Deal with C++: must preserve virtual function table size. */
1623 if (TREE_CODE (olddecl) == TYPE_DECL)
1625 tree newtype = TREE_TYPE (newdecl);
1626 tree oldtype = TREE_TYPE (olddecl);
1628 if (newtype != error_mark_node && oldtype != error_mark_node
1629 && TYPE_LANG_SPECIFIC (newtype) && TYPE_LANG_SPECIFIC (oldtype))
1630 CLASSTYPE_FRIEND_CLASSES (newtype)
1631 = CLASSTYPE_FRIEND_CLASSES (oldtype);
1633 DECL_ORIGINAL_TYPE (newdecl) = DECL_ORIGINAL_TYPE (olddecl);
1636 /* Copy all the DECL_... slots specified in the new decl
1637 except for any that we copy here from the old type. */
1638 DECL_ATTRIBUTES (newdecl)
1639 = (*targetm.merge_decl_attributes) (olddecl, newdecl);
1641 if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1645 old_result = DECL_TEMPLATE_RESULT (olddecl);
1646 new_result = DECL_TEMPLATE_RESULT (newdecl);
1647 TREE_TYPE (olddecl) = TREE_TYPE (old_result);
1648 DECL_TEMPLATE_SPECIALIZATIONS (olddecl)
1649 = chainon (DECL_TEMPLATE_SPECIALIZATIONS (olddecl),
1650 DECL_TEMPLATE_SPECIALIZATIONS (newdecl));
1652 DECL_ATTRIBUTES (old_result)
1653 = (*targetm.merge_decl_attributes) (old_result, new_result);
1655 if (DECL_FUNCTION_TEMPLATE_P (newdecl))
1657 if (GNU_INLINE_P (old_result) != GNU_INLINE_P (new_result)
1658 && DECL_INITIAL (new_result))
1660 if (DECL_INITIAL (old_result))
1662 DECL_INLINE (old_result) = 0;
1663 DECL_UNINLINABLE (old_result) = 1;
1667 DECL_INLINE (old_result) = DECL_INLINE (new_result);
1668 DECL_UNINLINABLE (old_result) = DECL_UNINLINABLE (new_result);
1670 DECL_EXTERNAL (old_result) = DECL_EXTERNAL (new_result);
1671 DECL_NOT_REALLY_EXTERN (old_result)
1672 = DECL_NOT_REALLY_EXTERN (new_result);
1673 DECL_INTERFACE_KNOWN (old_result)
1674 = DECL_INTERFACE_KNOWN (new_result);
1675 DECL_DECLARED_INLINE_P (old_result)
1676 = DECL_DECLARED_INLINE_P (new_result);
1680 DECL_INLINE (old_result)
1681 |= DECL_INLINE (new_result);
1682 DECL_DECLARED_INLINE_P (old_result)
1683 |= DECL_DECLARED_INLINE_P (new_result);
1684 check_redeclaration_exception_specification (newdecl, olddecl);
1688 /* If the new declaration is a definition, update the file and
1689 line information on the declaration, and also make
1690 the old declaration the same definition. */
1691 if (DECL_INITIAL (new_result) != NULL_TREE)
1693 DECL_SOURCE_LOCATION (olddecl)
1694 = DECL_SOURCE_LOCATION (old_result)
1695 = DECL_SOURCE_LOCATION (newdecl);
1696 DECL_INITIAL (old_result) = DECL_INITIAL (new_result);
1697 if (DECL_FUNCTION_TEMPLATE_P (newdecl))
1698 DECL_ARGUMENTS (old_result)
1699 = DECL_ARGUMENTS (new_result);
1707 /* Automatically handles default parameters. */
1708 tree oldtype = TREE_TYPE (olddecl);
1711 /* Merge the data types specified in the two decls. */
1712 newtype = merge_types (TREE_TYPE (newdecl), TREE_TYPE (olddecl));
1714 /* If merge_types produces a non-typedef type, just use the old type. */
1715 if (TREE_CODE (newdecl) == TYPE_DECL
1716 && newtype == DECL_ORIGINAL_TYPE (newdecl))
1719 if (TREE_CODE (newdecl) == VAR_DECL)
1721 DECL_THIS_EXTERN (newdecl) |= DECL_THIS_EXTERN (olddecl);
1722 DECL_INITIALIZED_P (newdecl) |= DECL_INITIALIZED_P (olddecl);
1723 DECL_NONTRIVIALLY_INITIALIZED_P (newdecl)
1724 |= DECL_NONTRIVIALLY_INITIALIZED_P (olddecl);
1725 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (newdecl)
1726 |= DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (olddecl);
1728 /* Merge the threadprivate attribute from OLDDECL into NEWDECL. */
1729 if (DECL_LANG_SPECIFIC (olddecl)
1730 && CP_DECL_THREADPRIVATE_P (olddecl))
1732 /* Allocate a LANG_SPECIFIC structure for NEWDECL, if needed. */
1733 if (!DECL_LANG_SPECIFIC (newdecl))
1734 retrofit_lang_decl (newdecl);
1736 DECL_TLS_MODEL (newdecl) = DECL_TLS_MODEL (olddecl);
1737 CP_DECL_THREADPRIVATE_P (newdecl) = 1;
1741 /* Do this after calling `merge_types' so that default
1742 parameters don't confuse us. */
1743 else if (TREE_CODE (newdecl) == FUNCTION_DECL)
1744 check_redeclaration_exception_specification (newdecl, olddecl);
1745 TREE_TYPE (newdecl) = TREE_TYPE (olddecl) = newtype;
1747 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1748 check_default_args (newdecl);
1750 /* Lay the type out, unless already done. */
1751 if (! same_type_p (newtype, oldtype)
1752 && TREE_TYPE (newdecl) != error_mark_node
1753 && !(processing_template_decl && uses_template_parms (newdecl)))
1754 layout_type (TREE_TYPE (newdecl));
1756 if ((TREE_CODE (newdecl) == VAR_DECL
1757 || TREE_CODE (newdecl) == PARM_DECL
1758 || TREE_CODE (newdecl) == RESULT_DECL
1759 || TREE_CODE (newdecl) == FIELD_DECL
1760 || TREE_CODE (newdecl) == TYPE_DECL)
1761 && !(processing_template_decl && uses_template_parms (newdecl)))
1762 layout_decl (newdecl, 0);
1764 /* Merge the type qualifiers. */
1765 if (TREE_READONLY (newdecl))
1766 TREE_READONLY (olddecl) = 1;
1767 if (TREE_THIS_VOLATILE (newdecl))
1768 TREE_THIS_VOLATILE (olddecl) = 1;
1769 if (TREE_NOTHROW (newdecl))
1770 TREE_NOTHROW (olddecl) = 1;
1772 /* Merge deprecatedness. */
1773 if (TREE_DEPRECATED (newdecl))
1774 TREE_DEPRECATED (olddecl) = 1;
1776 /* Merge the initialization information. */
1777 if (DECL_INITIAL (newdecl) == NULL_TREE
1778 && DECL_INITIAL (olddecl) != NULL_TREE)
1780 DECL_INITIAL (newdecl) = DECL_INITIAL (olddecl);
1781 DECL_SOURCE_LOCATION (newdecl) = DECL_SOURCE_LOCATION (olddecl);
1782 if (CAN_HAVE_FULL_LANG_DECL_P (newdecl)
1783 && DECL_LANG_SPECIFIC (newdecl)
1784 && DECL_LANG_SPECIFIC (olddecl))
1786 DECL_SAVED_TREE (newdecl) = DECL_SAVED_TREE (olddecl);
1787 DECL_STRUCT_FUNCTION (newdecl) = DECL_STRUCT_FUNCTION (olddecl);
1791 /* Merge the section attribute.
1792 We want to issue an error if the sections conflict but that must be
1793 done later in decl_attributes since we are called before attributes
1795 if (DECL_SECTION_NAME (newdecl) == NULL_TREE)
1796 DECL_SECTION_NAME (newdecl) = DECL_SECTION_NAME (olddecl);
1798 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1800 DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (newdecl)
1801 |= DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (olddecl);
1802 DECL_NO_LIMIT_STACK (newdecl) |= DECL_NO_LIMIT_STACK (olddecl);
1803 TREE_THIS_VOLATILE (newdecl) |= TREE_THIS_VOLATILE (olddecl);
1804 TREE_READONLY (newdecl) |= TREE_READONLY (olddecl);
1805 TREE_NOTHROW (newdecl) |= TREE_NOTHROW (olddecl);
1806 DECL_IS_MALLOC (newdecl) |= DECL_IS_MALLOC (olddecl);
1807 DECL_IS_PURE (newdecl) |= DECL_IS_PURE (olddecl);
1808 /* Keep the old RTL. */
1809 COPY_DECL_RTL (olddecl, newdecl);
1811 else if (TREE_CODE (newdecl) == VAR_DECL
1812 && (DECL_SIZE (olddecl) || !DECL_SIZE (newdecl)))
1814 /* Keep the old RTL. We cannot keep the old RTL if the old
1815 declaration was for an incomplete object and the new
1816 declaration is not since many attributes of the RTL will
1818 COPY_DECL_RTL (olddecl, newdecl);
1821 /* If cannot merge, then use the new type and qualifiers,
1822 and don't preserve the old rtl. */
1825 /* Clean out any memory we had of the old declaration. */
1826 tree oldstatic = value_member (olddecl, static_aggregates);
1828 TREE_VALUE (oldstatic) = error_mark_node;
1830 TREE_TYPE (olddecl) = TREE_TYPE (newdecl);
1831 TREE_READONLY (olddecl) = TREE_READONLY (newdecl);
1832 TREE_THIS_VOLATILE (olddecl) = TREE_THIS_VOLATILE (newdecl);
1833 TREE_SIDE_EFFECTS (olddecl) = TREE_SIDE_EFFECTS (newdecl);
1836 /* Merge the storage class information. */
1837 merge_weak (newdecl, olddecl);
1839 DECL_ONE_ONLY (newdecl) |= DECL_ONE_ONLY (olddecl);
1840 DECL_DEFER_OUTPUT (newdecl) |= DECL_DEFER_OUTPUT (olddecl);
1841 TREE_PUBLIC (newdecl) = TREE_PUBLIC (olddecl);
1842 TREE_STATIC (olddecl) = TREE_STATIC (newdecl) |= TREE_STATIC (olddecl);
1843 if (! DECL_EXTERNAL (olddecl))
1844 DECL_EXTERNAL (newdecl) = 0;
1846 new_template = NULL_TREE;
1847 if (DECL_LANG_SPECIFIC (newdecl) && DECL_LANG_SPECIFIC (olddecl))
1849 bool new_redefines_gnu_inline = false;
1851 if (new_defines_function
1852 && ((DECL_INTERFACE_KNOWN (olddecl)
1853 && TREE_CODE (olddecl) == FUNCTION_DECL)
1854 || (TREE_CODE (olddecl) == TEMPLATE_DECL
1855 && (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl))
1856 == FUNCTION_DECL))))
1860 if (TREE_CODE (fn) == TEMPLATE_DECL)
1861 fn = DECL_TEMPLATE_RESULT (olddecl);
1863 new_redefines_gnu_inline = GNU_INLINE_P (fn) && DECL_INITIAL (fn);
1866 if (!new_redefines_gnu_inline)
1868 DECL_INTERFACE_KNOWN (newdecl) |= DECL_INTERFACE_KNOWN (olddecl);
1869 DECL_NOT_REALLY_EXTERN (newdecl) |= DECL_NOT_REALLY_EXTERN (olddecl);
1870 DECL_COMDAT (newdecl) |= DECL_COMDAT (olddecl);
1872 DECL_TEMPLATE_INSTANTIATED (newdecl)
1873 |= DECL_TEMPLATE_INSTANTIATED (olddecl);
1875 /* If the OLDDECL is an instantiation and/or specialization,
1876 then the NEWDECL must be too. But, it may not yet be marked
1877 as such if the caller has created NEWDECL, but has not yet
1878 figured out that it is a redeclaration. */
1879 if (!DECL_USE_TEMPLATE (newdecl))
1880 DECL_USE_TEMPLATE (newdecl) = DECL_USE_TEMPLATE (olddecl);
1882 /* Don't really know how much of the language-specific
1883 values we should copy from old to new. */
1884 DECL_IN_AGGR_P (newdecl) = DECL_IN_AGGR_P (olddecl);
1885 DECL_LANG_SPECIFIC (newdecl)->decl_flags.u2 =
1886 DECL_LANG_SPECIFIC (olddecl)->decl_flags.u2;
1887 DECL_NONCONVERTING_P (newdecl) = DECL_NONCONVERTING_P (olddecl);
1888 DECL_REPO_AVAILABLE_P (newdecl) = DECL_REPO_AVAILABLE_P (olddecl);
1889 if (DECL_TEMPLATE_INFO (newdecl))
1890 new_template = DECL_TI_TEMPLATE (newdecl);
1891 DECL_TEMPLATE_INFO (newdecl) = DECL_TEMPLATE_INFO (olddecl);
1892 DECL_INITIALIZED_IN_CLASS_P (newdecl)
1893 |= DECL_INITIALIZED_IN_CLASS_P (olddecl);
1894 olddecl_friend = DECL_FRIEND_P (olddecl);
1895 hidden_friend = (DECL_ANTICIPATED (olddecl)
1896 && DECL_HIDDEN_FRIEND_P (olddecl)
1897 && newdecl_is_friend);
1899 /* Only functions have DECL_BEFRIENDING_CLASSES. */
1900 if (TREE_CODE (newdecl) == FUNCTION_DECL
1901 || DECL_FUNCTION_TEMPLATE_P (newdecl))
1903 DECL_BEFRIENDING_CLASSES (newdecl)
1904 = chainon (DECL_BEFRIENDING_CLASSES (newdecl),
1905 DECL_BEFRIENDING_CLASSES (olddecl));
1906 /* DECL_THUNKS is only valid for virtual functions,
1907 otherwise it is a DECL_FRIEND_CONTEXT. */
1908 if (DECL_VIRTUAL_P (newdecl))
1909 DECL_THUNKS (newdecl) = DECL_THUNKS (olddecl);
1913 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1915 if (DECL_TEMPLATE_INSTANTIATION (olddecl)
1916 && !DECL_TEMPLATE_INSTANTIATION (newdecl))
1918 /* If newdecl is not a specialization, then it is not a
1919 template-related function at all. And that means that we
1920 should have exited above, returning 0. */
1921 gcc_assert (DECL_TEMPLATE_SPECIALIZATION (newdecl));
1923 if (TREE_USED (olddecl))
1924 /* From [temp.expl.spec]:
1926 If a template, a member template or the member of a class
1927 template is explicitly specialized then that
1928 specialization shall be declared before the first use of
1929 that specialization that would cause an implicit
1930 instantiation to take place, in every translation unit in
1931 which such a use occurs. */
1932 error ("explicit specialization of %qD after first use",
1935 SET_DECL_TEMPLATE_SPECIALIZATION (olddecl);
1937 /* Don't propagate visibility from the template to the
1938 specialization here. We'll do that in determine_visibility if
1940 DECL_VISIBILITY_SPECIFIED (olddecl) = 0;
1942 /* [temp.expl.spec/14] We don't inline explicit specialization
1943 just because the primary template says so. */
1945 else if (new_defines_function && DECL_INITIAL (olddecl))
1947 /* C++ is always in in unit-at-a-time mode, so we never
1948 inline re-defined extern inline functions. */
1949 DECL_INLINE (newdecl) = 0;
1950 DECL_UNINLINABLE (newdecl) = 1;
1954 if (DECL_PENDING_INLINE_INFO (newdecl) == 0)
1955 DECL_PENDING_INLINE_INFO (newdecl) = DECL_PENDING_INLINE_INFO (olddecl);
1957 DECL_DECLARED_INLINE_P (newdecl) |= DECL_DECLARED_INLINE_P (olddecl);
1959 /* If either decl says `inline', this fn is inline, unless
1960 its definition was passed already. */
1961 if (DECL_INLINE (newdecl) && DECL_INITIAL (olddecl) == NULL_TREE)
1962 DECL_INLINE (olddecl) = 1;
1963 DECL_INLINE (newdecl) = DECL_INLINE (olddecl);
1965 DECL_UNINLINABLE (newdecl) = DECL_UNINLINABLE (olddecl)
1966 = (DECL_UNINLINABLE (newdecl) || DECL_UNINLINABLE (olddecl));
1968 DECL_DISREGARD_INLINE_LIMITS (newdecl)
1969 = DECL_DISREGARD_INLINE_LIMITS (olddecl)
1970 = (DECL_DISREGARD_INLINE_LIMITS (newdecl)
1971 || DECL_DISREGARD_INLINE_LIMITS (olddecl));
1974 /* Preserve abstractness on cloned [cd]tors. */
1975 DECL_ABSTRACT (newdecl) = DECL_ABSTRACT (olddecl);
1979 SET_DECL_LANGUAGE (olddecl, DECL_LANGUAGE (newdecl));
1980 COPY_DECL_ASSEMBLER_NAME (newdecl, olddecl);
1981 COPY_DECL_RTL (newdecl, olddecl);
1983 if (! types_match || new_defines_function)
1985 /* These need to be copied so that the names are available.
1986 Note that if the types do match, we'll preserve inline
1987 info and other bits, but if not, we won't. */
1988 DECL_ARGUMENTS (olddecl) = DECL_ARGUMENTS (newdecl);
1989 DECL_RESULT (olddecl) = DECL_RESULT (newdecl);
1991 if (new_defines_function)
1992 /* If defining a function declared with other language
1993 linkage, use the previously declared language linkage. */
1994 SET_DECL_LANGUAGE (newdecl, DECL_LANGUAGE (olddecl));
1995 else if (types_match)
1997 /* If redeclaring a builtin function, and not a definition,
1998 it stays built in. */
1999 if (DECL_BUILT_IN (olddecl))
2001 DECL_BUILT_IN_CLASS (newdecl) = DECL_BUILT_IN_CLASS (olddecl);
2002 DECL_FUNCTION_CODE (newdecl) = DECL_FUNCTION_CODE (olddecl);
2003 /* If we're keeping the built-in definition, keep the rtl,
2004 regardless of declaration matches. */
2005 COPY_DECL_RTL (olddecl, newdecl);
2008 DECL_RESULT (newdecl) = DECL_RESULT (olddecl);
2009 /* Don't clear out the arguments if we're redefining a function. */
2010 if (DECL_ARGUMENTS (olddecl))
2011 DECL_ARGUMENTS (newdecl) = DECL_ARGUMENTS (olddecl);
2014 else if (TREE_CODE (newdecl) == NAMESPACE_DECL)
2015 NAMESPACE_LEVEL (newdecl) = NAMESPACE_LEVEL (olddecl);
2017 /* Now preserve various other info from the definition. */
2018 TREE_ADDRESSABLE (newdecl) = TREE_ADDRESSABLE (olddecl);
2019 TREE_ASM_WRITTEN (newdecl) = TREE_ASM_WRITTEN (olddecl);
2020 DECL_COMMON (newdecl) = DECL_COMMON (olddecl);
2021 COPY_DECL_ASSEMBLER_NAME (olddecl, newdecl);
2023 /* Warn about conflicting visibility specifications. */
2024 if (DECL_VISIBILITY_SPECIFIED (olddecl)
2025 && DECL_VISIBILITY_SPECIFIED (newdecl)
2026 && DECL_VISIBILITY (newdecl) != DECL_VISIBILITY (olddecl))
2028 warning (OPT_Wattributes, "%q+D: visibility attribute ignored "
2029 "because it", newdecl);
2030 warning (OPT_Wattributes, "%Jconflicts with previous "
2031 "declaration here", olddecl);
2033 /* Choose the declaration which specified visibility. */
2034 if (DECL_VISIBILITY_SPECIFIED (olddecl))
2036 DECL_VISIBILITY (newdecl) = DECL_VISIBILITY (olddecl);
2037 DECL_VISIBILITY_SPECIFIED (newdecl) = 1;
2039 /* Init priority used to be merged from newdecl to olddecl by the memcpy,
2040 so keep this behavior. */
2041 if (TREE_CODE (newdecl) == VAR_DECL && DECL_HAS_INIT_PRIORITY_P (newdecl))
2043 SET_DECL_INIT_PRIORITY (olddecl, DECL_INIT_PRIORITY (newdecl));
2044 DECL_HAS_INIT_PRIORITY_P (olddecl) = 1;
2047 /* The DECL_LANG_SPECIFIC information in OLDDECL will be replaced
2048 with that from NEWDECL below. */
2049 if (DECL_LANG_SPECIFIC (olddecl))
2051 gcc_assert (DECL_LANG_SPECIFIC (olddecl)
2052 != DECL_LANG_SPECIFIC (newdecl));
2053 ggc_free (DECL_LANG_SPECIFIC (olddecl));
2056 if (TREE_CODE (newdecl) == FUNCTION_DECL)
2060 function_size = sizeof (struct tree_decl_common);
2062 memcpy ((char *) olddecl + sizeof (struct tree_common),
2063 (char *) newdecl + sizeof (struct tree_common),
2064 function_size - sizeof (struct tree_common));
2066 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
2067 (char *) newdecl + sizeof (struct tree_decl_common),
2068 sizeof (struct tree_function_decl) - sizeof (struct tree_decl_common));
2070 /* If newdecl is a template instantiation, it is possible that
2071 the following sequence of events has occurred:
2073 o A friend function was declared in a class template. The
2074 class template was instantiated.
2076 o The instantiation of the friend declaration was
2077 recorded on the instantiation list, and is newdecl.
2079 o Later, however, instantiate_class_template called pushdecl
2080 on the newdecl to perform name injection. But, pushdecl in
2081 turn called duplicate_decls when it discovered that another
2082 declaration of a global function with the same name already
2085 o Here, in duplicate_decls, we decided to clobber newdecl.
2087 If we're going to do that, we'd better make sure that
2088 olddecl, and not newdecl, is on the list of
2089 instantiations so that if we try to do the instantiation
2090 again we won't get the clobbered declaration. */
2091 reregister_specialization (newdecl,
2097 size_t size = tree_code_size (TREE_CODE (olddecl));
2098 memcpy ((char *) olddecl + sizeof (struct tree_common),
2099 (char *) newdecl + sizeof (struct tree_common),
2100 sizeof (struct tree_decl_common) - sizeof (struct tree_common));
2101 switch (TREE_CODE (olddecl))
2111 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
2112 (char *) newdecl + sizeof (struct tree_decl_common),
2113 size - sizeof (struct tree_decl_common)
2114 + TREE_CODE_LENGTH (TREE_CODE (newdecl)) * sizeof (char *));
2118 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
2119 (char *) newdecl + sizeof (struct tree_decl_common),
2120 sizeof (struct tree_decl_non_common) - sizeof (struct tree_decl_common)
2121 + TREE_CODE_LENGTH (TREE_CODE (newdecl)) * sizeof (char *));
2125 DECL_UID (olddecl) = olddecl_uid;
2127 DECL_FRIEND_P (olddecl) = 1;
2130 DECL_ANTICIPATED (olddecl) = 1;
2131 DECL_HIDDEN_FRIEND_P (olddecl) = 1;
2134 /* NEWDECL contains the merged attribute lists.
2135 Update OLDDECL to be the same. */
2136 DECL_ATTRIBUTES (olddecl) = DECL_ATTRIBUTES (newdecl);
2138 /* If OLDDECL had its DECL_RTL instantiated, re-invoke make_decl_rtl
2139 so that encode_section_info has a chance to look at the new decl
2140 flags and attributes. */
2141 if (DECL_RTL_SET_P (olddecl)
2142 && (TREE_CODE (olddecl) == FUNCTION_DECL
2143 || (TREE_CODE (olddecl) == VAR_DECL
2144 && TREE_STATIC (olddecl))))
2145 make_decl_rtl (olddecl);
2147 /* The NEWDECL will no longer be needed. Because every out-of-class
2148 declaration of a member results in a call to duplicate_decls,
2149 freeing these nodes represents in a significant savings. */
2155 /* Return zero if the declaration NEWDECL is valid
2156 when the declaration OLDDECL (assumed to be for the same name)
2157 has already been seen.
2158 Otherwise return an error message format string with a %s
2159 where the identifier should go. */
2162 redeclaration_error_message (tree newdecl, tree olddecl)
2164 if (TREE_CODE (newdecl) == TYPE_DECL)
2166 /* Because C++ can put things into name space for free,
2167 constructs like "typedef struct foo { ... } foo"
2168 would look like an erroneous redeclaration. */
2169 if (same_type_p (TREE_TYPE (newdecl), TREE_TYPE (olddecl)))
2172 return "redefinition of %q#D";
2174 else if (TREE_CODE (newdecl) == FUNCTION_DECL)
2176 /* If this is a pure function, its olddecl will actually be
2177 the original initialization to `0' (which we force to call
2178 abort()). Don't complain about redefinition in this case. */
2179 if (DECL_LANG_SPECIFIC (olddecl) && DECL_PURE_VIRTUAL_P (olddecl)
2180 && DECL_INITIAL (olddecl) == NULL_TREE)
2183 /* If both functions come from different namespaces, this is not
2184 a redeclaration - this is a conflict with a used function. */
2185 if (DECL_NAMESPACE_SCOPE_P (olddecl)
2186 && DECL_CONTEXT (olddecl) != DECL_CONTEXT (newdecl)
2187 && ! decls_match (olddecl, newdecl))
2188 return "%qD conflicts with used function";
2190 /* We'll complain about linkage mismatches in
2191 warn_extern_redeclared_static. */
2193 /* Defining the same name twice is no good. */
2194 if (DECL_INITIAL (olddecl) != NULL_TREE
2195 && DECL_INITIAL (newdecl) != NULL_TREE)
2197 if (DECL_NAME (olddecl) == NULL_TREE)
2198 return "%q#D not declared in class";
2199 else if (!GNU_INLINE_P (olddecl)
2200 || GNU_INLINE_P (newdecl))
2201 return "redefinition of %q#D";
2204 if (DECL_DECLARED_INLINE_P (olddecl) && DECL_DECLARED_INLINE_P (newdecl))
2206 bool olda = GNU_INLINE_P (olddecl);
2207 bool newa = GNU_INLINE_P (newdecl);
2212 return "%q+D redeclared inline with %<gnu_inline%> attribute";
2214 return "%q+D redeclared inline without %<gnu_inline%> attribute";
2220 else if (TREE_CODE (newdecl) == TEMPLATE_DECL)
2224 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
2226 if (COMPLETE_TYPE_P (TREE_TYPE (newdecl))
2227 && COMPLETE_TYPE_P (TREE_TYPE (olddecl)))
2228 return "redefinition of %q#D";
2232 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) != FUNCTION_DECL
2233 || (DECL_TEMPLATE_RESULT (newdecl)
2234 == DECL_TEMPLATE_RESULT (olddecl)))
2237 nt = DECL_TEMPLATE_RESULT (newdecl);
2238 if (DECL_TEMPLATE_INFO (nt))
2239 nt = DECL_TEMPLATE_RESULT (template_for_substitution (nt));
2240 ot = DECL_TEMPLATE_RESULT (olddecl);
2241 if (DECL_TEMPLATE_INFO (ot))
2242 ot = DECL_TEMPLATE_RESULT (template_for_substitution (ot));
2243 if (DECL_INITIAL (nt) && DECL_INITIAL (ot)
2244 && (!GNU_INLINE_P (ot) || GNU_INLINE_P (nt)))
2245 return "redefinition of %q#D";
2247 if (DECL_DECLARED_INLINE_P (ot) && DECL_DECLARED_INLINE_P (nt))
2249 bool olda = GNU_INLINE_P (ot);
2250 bool newa = GNU_INLINE_P (nt);
2255 return "%q+D redeclared inline with %<gnu_inline%> attribute";
2257 return "%q+D redeclared inline without %<gnu_inline%> attribute";
2261 /* Core issue #226 (C++0x):
2263 If a friend function template declaration specifies a
2264 default template-argument, that declaration shall be a
2265 definition and shall be the only declaration of the
2266 function template in the translation unit. */
2267 if ((cxx_dialect != cxx98)
2268 && TREE_CODE (ot) == FUNCTION_DECL && DECL_FRIEND_P (ot)
2269 && !check_default_tmpl_args (nt, DECL_TEMPLATE_PARMS (newdecl),
2270 /*is_primary=*/1, /*is_partial=*/0,
2271 /*is_friend_decl=*/2))
2272 return "redeclaration of friend %q#D may not have default template arguments";
2276 else if (TREE_CODE (newdecl) == VAR_DECL
2277 && DECL_THREAD_LOCAL_P (newdecl) != DECL_THREAD_LOCAL_P (olddecl)
2278 && (! DECL_LANG_SPECIFIC (olddecl)
2279 || ! CP_DECL_THREADPRIVATE_P (olddecl)
2280 || DECL_THREAD_LOCAL_P (newdecl)))
2282 /* Only variables can be thread-local, and all declarations must
2283 agree on this property. */
2284 if (DECL_THREAD_LOCAL_P (newdecl))
2285 return "thread-local declaration of %q#D follows "
2286 "non-thread-local declaration";
2288 return "non-thread-local declaration of %q#D follows "
2289 "thread-local declaration";
2291 else if (toplevel_bindings_p () || DECL_NAMESPACE_SCOPE_P (newdecl))
2293 /* The objects have been declared at namespace scope. If either
2294 is a member of an anonymous union, then this is an invalid
2295 redeclaration. For example:
2301 if ((TREE_CODE (newdecl) == VAR_DECL && DECL_ANON_UNION_VAR_P (newdecl))
2302 || (TREE_CODE (olddecl) == VAR_DECL && DECL_ANON_UNION_VAR_P (olddecl)))
2303 return "redeclaration of %q#D";
2304 /* If at least one declaration is a reference, there is no
2305 conflict. For example:
2311 if (DECL_EXTERNAL (newdecl) || DECL_EXTERNAL (olddecl))
2313 /* Reject two definitions. */
2314 return "redefinition of %q#D";
2318 /* Objects declared with block scope: */
2319 /* Reject two definitions, and reject a definition
2320 together with an external reference. */
2321 if (!(DECL_EXTERNAL (newdecl) && DECL_EXTERNAL (olddecl)))
2322 return "redeclaration of %q#D";
2327 /* Hash and equality functions for the named_label table. */
2330 named_label_entry_hash (const void *data)
2332 const struct named_label_entry *ent = (const struct named_label_entry *) data;
2333 return DECL_UID (ent->label_decl);
2337 named_label_entry_eq (const void *a, const void *b)
2339 const struct named_label_entry *ent_a = (const struct named_label_entry *) a;
2340 const struct named_label_entry *ent_b = (const struct named_label_entry *) b;
2341 return ent_a->label_decl == ent_b->label_decl;
2344 /* Create a new label, named ID. */
2347 make_label_decl (tree id, int local_p)
2349 struct named_label_entry *ent;
2353 decl = build_decl (LABEL_DECL, id, void_type_node);
2355 DECL_CONTEXT (decl) = current_function_decl;
2356 DECL_MODE (decl) = VOIDmode;
2357 C_DECLARED_LABEL_FLAG (decl) = local_p;
2359 /* Say where one reference is to the label, for the sake of the
2360 error if it is not defined. */
2361 DECL_SOURCE_LOCATION (decl) = input_location;
2363 /* Record the fact that this identifier is bound to this label. */
2364 SET_IDENTIFIER_LABEL_VALUE (id, decl);
2366 /* Create the label htab for the function on demand. */
2368 named_labels = htab_create_ggc (13, named_label_entry_hash,
2369 named_label_entry_eq, NULL);
2371 /* Record this label on the list of labels used in this function.
2372 We do this before calling make_label_decl so that we get the
2373 IDENTIFIER_LABEL_VALUE before the new label is declared. */
2374 ent = GGC_CNEW (struct named_label_entry);
2375 ent->label_decl = decl;
2377 slot = htab_find_slot (named_labels, ent, INSERT);
2378 gcc_assert (*slot == NULL);
2384 /* Look for a label named ID in the current function. If one cannot
2385 be found, create one. (We keep track of used, but undefined,
2386 labels, and complain about them at the end of a function.) */
2389 lookup_label (tree id)
2393 timevar_push (TV_NAME_LOOKUP);
2394 /* You can't use labels at global scope. */
2395 if (current_function_decl == NULL_TREE)
2397 error ("label %qE referenced outside of any function", id);
2398 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, NULL_TREE);
2401 /* See if we've already got this label. */
2402 decl = IDENTIFIER_LABEL_VALUE (id);
2403 if (decl != NULL_TREE && DECL_CONTEXT (decl) == current_function_decl)
2404 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2406 decl = make_label_decl (id, /*local_p=*/0);
2407 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2410 /* Declare a local label named ID. */
2413 declare_local_label (tree id)
2417 /* Add a new entry to the SHADOWED_LABELS list so that when we leave
2418 this scope we can restore the old value of IDENTIFIER_TYPE_VALUE. */
2419 shadow = tree_cons (IDENTIFIER_LABEL_VALUE (id), NULL_TREE,
2420 current_binding_level->shadowed_labels);
2421 current_binding_level->shadowed_labels = shadow;
2423 decl = make_label_decl (id, /*local_p=*/1);
2424 TREE_VALUE (shadow) = decl;
2429 /* Returns nonzero if it is ill-formed to jump past the declaration of
2430 DECL. Returns 2 if it's also a real problem. */
2433 decl_jump_unsafe (tree decl)
2435 if (TREE_CODE (decl) != VAR_DECL || TREE_STATIC (decl)
2436 || TREE_TYPE (decl) == error_mark_node)
2439 if (TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl))
2440 || DECL_NONTRIVIALLY_INITIALIZED_P (decl))
2443 if (pod_type_p (TREE_TYPE (decl)))
2446 /* The POD stuff is just pedantry; why should it matter if the class
2447 contains a field of pointer to member type? */
2451 /* A subroutine of check_previous_goto_1 to identify a branch to the user. */
2454 identify_goto (tree decl, const location_t *locus)
2457 pedwarn ("jump to label %qD", decl);
2459 pedwarn ("jump to case label");
2461 pedwarn ("%H from here", locus);
2464 /* Check that a single previously seen jump to a newly defined label
2465 is OK. DECL is the LABEL_DECL or 0; LEVEL is the binding_level for
2466 the jump context; NAMES are the names in scope in LEVEL at the jump
2467 context; LOCUS is the source position of the jump or 0. Returns
2468 true if all is well. */
2471 check_previous_goto_1 (tree decl, struct cp_binding_level* level, tree names,
2472 bool exited_omp, const location_t *locus)
2474 struct cp_binding_level *b;
2475 bool identified = false, saw_eh = false, saw_omp = false;
2479 identify_goto (decl, locus);
2480 error (" exits OpenMP structured block");
2481 identified = saw_omp = true;
2484 for (b = current_binding_level; b ; b = b->level_chain)
2486 tree new_decls, old_decls = (b == level ? names : NULL_TREE);
2488 for (new_decls = b->names; new_decls != old_decls;
2489 new_decls = TREE_CHAIN (new_decls))
2491 int problem = decl_jump_unsafe (new_decls);
2497 identify_goto (decl, locus);
2501 error (" crosses initialization of %q+#D", new_decls);
2503 pedwarn (" enters scope of non-POD %q+#D", new_decls);
2508 if ((b->kind == sk_try || b->kind == sk_catch) && !saw_eh)
2512 identify_goto (decl, locus);
2515 if (b->kind == sk_try)
2516 error (" enters try block");
2518 error (" enters catch block");
2521 if (b->kind == sk_omp && !saw_omp)
2525 identify_goto (decl, locus);
2528 error (" enters OpenMP structured block");
2537 check_previous_goto (tree decl, struct named_label_use_entry *use)
2539 check_previous_goto_1 (decl, use->binding_level,
2540 use->names_in_scope, use->in_omp_scope,
2541 &use->o_goto_locus);
2545 check_switch_goto (struct cp_binding_level* level)
2547 return check_previous_goto_1 (NULL_TREE, level, level->names, false, NULL);
2550 /* Check that a new jump to a label DECL is OK. Called by
2551 finish_goto_stmt. */
2554 check_goto (tree decl)
2556 struct named_label_entry *ent, dummy;
2557 bool saw_catch = false, identified = false;
2560 /* We can't know where a computed goto is jumping.
2561 So we assume that it's OK. */
2562 if (TREE_CODE (decl) != LABEL_DECL)
2565 /* We didn't record any information about this label when we created it,
2566 and there's not much point since it's trivial to analyze as a return. */
2567 if (decl == cdtor_label)
2570 dummy.label_decl = decl;
2571 ent = (struct named_label_entry *) htab_find (named_labels, &dummy);
2572 gcc_assert (ent != NULL);
2574 /* If the label hasn't been defined yet, defer checking. */
2575 if (! DECL_INITIAL (decl))
2577 struct named_label_use_entry *new_use;
2579 /* Don't bother creating another use if the last goto had the
2580 same data, and will therefore create the same set of errors. */
2582 && ent->uses->names_in_scope == current_binding_level->names)
2585 new_use = GGC_NEW (struct named_label_use_entry);
2586 new_use->binding_level = current_binding_level;
2587 new_use->names_in_scope = current_binding_level->names;
2588 new_use->o_goto_locus = input_location;
2589 new_use->in_omp_scope = false;
2591 new_use->next = ent->uses;
2592 ent->uses = new_use;
2596 if (ent->in_try_scope || ent->in_catch_scope
2597 || ent->in_omp_scope || ent->bad_decls)
2599 pedwarn ("jump to label %q+D", decl);
2600 pedwarn (" from here");
2604 for (bad = ent->bad_decls; bad; bad = TREE_CHAIN (bad))
2606 tree b = TREE_VALUE (bad);
2607 int u = decl_jump_unsafe (b);
2609 if (u > 1 && DECL_ARTIFICIAL (b))
2611 /* Can't skip init of __exception_info. */
2612 error ("%J enters catch block", b);
2616 error (" skips initialization of %q+#D", b);
2618 pedwarn (" enters scope of non-POD %q+#D", b);
2621 if (ent->in_try_scope)
2622 error (" enters try block");
2623 else if (ent->in_catch_scope && !saw_catch)
2624 error (" enters catch block");
2626 if (ent->in_omp_scope)
2627 error (" enters OpenMP structured block");
2628 else if (flag_openmp)
2630 struct cp_binding_level *b;
2631 for (b = current_binding_level; b ; b = b->level_chain)
2633 if (b == ent->binding_level)
2635 if (b->kind == sk_omp)
2639 pedwarn ("jump to label %q+D", decl);
2640 pedwarn (" from here");
2643 error (" exits OpenMP structured block");
2650 /* Check that a return is ok wrt OpenMP structured blocks.
2651 Called by finish_return_stmt. Returns true if all is well. */
2654 check_omp_return (void)
2656 struct cp_binding_level *b;
2657 for (b = current_binding_level; b ; b = b->level_chain)
2658 if (b->kind == sk_omp)
2660 error ("invalid exit from OpenMP structured block");
2666 /* Define a label, specifying the location in the source file.
2667 Return the LABEL_DECL node for the label. */
2670 define_label (location_t location, tree name)
2672 struct named_label_entry *ent, dummy;
2673 struct cp_binding_level *p;
2676 timevar_push (TV_NAME_LOOKUP);
2678 decl = lookup_label (name);
2680 dummy.label_decl = decl;
2681 ent = (struct named_label_entry *) htab_find (named_labels, &dummy);
2682 gcc_assert (ent != NULL);
2684 /* After labels, make any new cleanups in the function go into their
2685 own new (temporary) binding contour. */
2686 for (p = current_binding_level;
2687 p->kind != sk_function_parms;
2689 p->more_cleanups_ok = 0;
2691 if (name == get_identifier ("wchar_t"))
2692 pedwarn ("label named wchar_t");
2694 if (DECL_INITIAL (decl) != NULL_TREE)
2696 error ("duplicate label %qD", decl);
2697 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
2701 struct named_label_use_entry *use;
2703 /* Mark label as having been defined. */
2704 DECL_INITIAL (decl) = error_mark_node;
2705 /* Say where in the source. */
2706 DECL_SOURCE_LOCATION (decl) = location;
2708 ent->binding_level = current_binding_level;
2709 ent->names_in_scope = current_binding_level->names;
2711 for (use = ent->uses; use ; use = use->next)
2712 check_previous_goto (decl, use);
2716 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2721 struct cp_binding_level *level;
2722 struct cp_switch *next;
2723 /* The SWITCH_STMT being built. */
2725 /* A splay-tree mapping the low element of a case range to the high
2726 element, or NULL_TREE if there is no high element. Used to
2727 determine whether or not a new case label duplicates an old case
2728 label. We need a tree, rather than simply a hash table, because
2729 of the GNU case range extension. */
2733 /* A stack of the currently active switch statements. The innermost
2734 switch statement is on the top of the stack. There is no need to
2735 mark the stack for garbage collection because it is only active
2736 during the processing of the body of a function, and we never
2737 collect at that point. */
2739 static struct cp_switch *switch_stack;
2741 /* Called right after a switch-statement condition is parsed.
2742 SWITCH_STMT is the switch statement being parsed. */
2745 push_switch (tree switch_stmt)
2747 struct cp_switch *p = XNEW (struct cp_switch);
2748 p->level = current_binding_level;
2749 p->next = switch_stack;
2750 p->switch_stmt = switch_stmt;
2751 p->cases = splay_tree_new (case_compare, NULL, NULL);
2758 struct cp_switch *cs = switch_stack;
2759 location_t switch_location;
2761 /* Emit warnings as needed. */
2762 if (EXPR_HAS_LOCATION (cs->switch_stmt))
2763 switch_location = EXPR_LOCATION (cs->switch_stmt);
2765 switch_location = input_location;
2766 if (!processing_template_decl)
2767 c_do_switch_warnings (cs->cases, switch_location,
2768 SWITCH_STMT_TYPE (cs->switch_stmt),
2769 SWITCH_STMT_COND (cs->switch_stmt));
2771 splay_tree_delete (cs->cases);
2772 switch_stack = switch_stack->next;
2776 /* Note that we've seen a definition of a case label, and complain if this
2777 is a bad place for one. */
2780 finish_case_label (tree low_value, tree high_value)
2783 struct cp_binding_level *p;
2785 if (processing_template_decl)
2789 /* For templates, just add the case label; we'll do semantic
2790 analysis at instantiation-time. */
2791 label = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
2792 return add_stmt (build_case_label (low_value, high_value, label));
2795 /* Find the condition on which this switch statement depends. */
2796 cond = SWITCH_STMT_COND (switch_stack->switch_stmt);
2797 if (cond && TREE_CODE (cond) == TREE_LIST)
2798 cond = TREE_VALUE (cond);
2800 if (!check_switch_goto (switch_stack->level))
2801 return error_mark_node;
2803 r = c_add_case_label (switch_stack->cases, cond, TREE_TYPE (cond),
2804 low_value, high_value);
2806 /* After labels, make any new cleanups in the function go into their
2807 own new (temporary) binding contour. */
2808 for (p = current_binding_level;
2809 p->kind != sk_function_parms;
2811 p->more_cleanups_ok = 0;
2816 /* Hash a TYPENAME_TYPE. K is really of type `tree'. */
2819 typename_hash (const void* k)
2822 const_tree const t = (const_tree) k;
2824 hash = (htab_hash_pointer (TYPE_CONTEXT (t))
2825 ^ htab_hash_pointer (DECL_NAME (TYPE_NAME (t))));
2830 typedef struct typename_info {
2838 /* Compare two TYPENAME_TYPEs. K1 is really of type `tree', K2 is
2839 really of type `typename_info*' */
2842 typename_compare (const void * k1, const void * k2)
2844 const_tree const t1 = (const_tree) k1;
2845 const typename_info *const t2 = (const typename_info *) k2;
2847 return (DECL_NAME (TYPE_NAME (t1)) == t2->name
2848 && TYPE_CONTEXT (t1) == t2->scope
2849 && TYPENAME_TYPE_FULLNAME (t1) == t2->template_id
2850 && TYPENAME_IS_ENUM_P (t1) == t2->enum_p
2851 && TYPENAME_IS_CLASS_P (t1) == t2->class_p);
2854 /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
2855 the type of `T', NAME is the IDENTIFIER_NODE for `t'.
2857 Returns the new TYPENAME_TYPE. */
2859 static GTY ((param_is (union tree_node))) htab_t typename_htab;
2862 build_typename_type (tree context, tree name, tree fullname,
2863 enum tag_types tag_type)
2871 if (typename_htab == NULL)
2872 typename_htab = htab_create_ggc (61, &typename_hash,
2873 &typename_compare, NULL);
2875 ti.scope = FROB_CONTEXT (context);
2877 ti.template_id = fullname;
2878 ti.enum_p = tag_type == enum_type;
2879 ti.class_p = (tag_type == class_type
2880 || tag_type == record_type
2881 || tag_type == union_type);
2882 hash = (htab_hash_pointer (ti.scope)
2883 ^ htab_hash_pointer (ti.name));
2885 /* See if we already have this type. */
2886 e = htab_find_slot_with_hash (typename_htab, &ti, hash, INSERT);
2891 /* Build the TYPENAME_TYPE. */
2892 t = make_aggr_type (TYPENAME_TYPE);
2893 TYPE_CONTEXT (t) = ti.scope;
2894 TYPENAME_TYPE_FULLNAME (t) = ti.template_id;
2895 TYPENAME_IS_ENUM_P (t) = ti.enum_p;
2896 TYPENAME_IS_CLASS_P (t) = ti.class_p;
2898 /* Build the corresponding TYPE_DECL. */
2899 d = build_decl (TYPE_DECL, name, t);
2900 TYPE_NAME (TREE_TYPE (d)) = d;
2901 TYPE_STUB_DECL (TREE_TYPE (d)) = d;
2902 DECL_CONTEXT (d) = FROB_CONTEXT (context);
2903 DECL_ARTIFICIAL (d) = 1;
2905 /* Store it in the hash table. */
2908 /* TYPENAME_TYPEs must always be compared structurally, because
2909 they may or may not resolve down to another type depending on
2910 the currently open classes. */
2911 SET_TYPE_STRUCTURAL_EQUALITY (t);
2917 /* Resolve `typename CONTEXT::NAME'. TAG_TYPE indicates the tag
2918 provided to name the type. Returns an appropriate type, unless an
2919 error occurs, in which case error_mark_node is returned. If we
2920 locate a non-artificial TYPE_DECL and TF_KEEP_TYPE_DECL is set, we
2921 return that, rather than the _TYPE it corresponds to, in other
2922 cases we look through the type decl. If TF_ERROR is set, complain
2923 about errors, otherwise be quiet. */
2926 make_typename_type (tree context, tree name, enum tag_types tag_type,
2927 tsubst_flags_t complain)
2933 if (name == error_mark_node
2934 || context == NULL_TREE
2935 || context == error_mark_node)
2936 return error_mark_node;
2940 if (!(TYPE_LANG_SPECIFIC (name)
2941 && (CLASSTYPE_IS_TEMPLATE (name)
2942 || CLASSTYPE_USE_TEMPLATE (name))))
2943 name = TYPE_IDENTIFIER (name);
2945 /* Create a TEMPLATE_ID_EXPR for the type. */
2946 name = build_nt (TEMPLATE_ID_EXPR,
2947 CLASSTYPE_TI_TEMPLATE (name),
2948 CLASSTYPE_TI_ARGS (name));
2950 else if (TREE_CODE (name) == TYPE_DECL)
2951 name = DECL_NAME (name);
2955 if (TREE_CODE (name) == TEMPLATE_ID_EXPR)
2957 name = TREE_OPERAND (name, 0);
2958 if (TREE_CODE (name) == TEMPLATE_DECL)
2959 name = TREE_OPERAND (fullname, 0) = DECL_NAME (name);
2960 else if (TREE_CODE (name) == OVERLOAD)
2962 error ("%qD is not a type", name);
2963 return error_mark_node;
2966 if (TREE_CODE (name) == TEMPLATE_DECL)
2968 error ("%qD used without template parameters", name);
2969 return error_mark_node;
2971 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
2972 gcc_assert (TYPE_P (context));
2974 /* When the CONTEXT is a dependent type, NAME could refer to a
2975 dependent base class of CONTEXT. So we cannot peek inside it,
2976 even if CONTEXT is a currently open scope. */
2977 if (dependent_type_p (context))
2978 return build_typename_type (context, name, fullname, tag_type);
2980 if (!IS_AGGR_TYPE (context))
2982 if (complain & tf_error)
2983 error ("%q#T is not a class", context);
2984 return error_mark_node;
2987 want_template = TREE_CODE (fullname) == TEMPLATE_ID_EXPR;
2989 /* We should only set WANT_TYPE when we're a nested typename type.
2990 Then we can give better diagnostics if we find a non-type. */
2991 t = lookup_field (context, name, 0, /*want_type=*/true);
2994 if (complain & tf_error)
2995 error (want_template ? "no class template named %q#T in %q#T"
2996 : "no type named %q#T in %q#T", name, context);
2997 return error_mark_node;
3000 if (want_template && !DECL_CLASS_TEMPLATE_P (t))
3002 if (complain & tf_error)
3003 error ("%<typename %T::%D%> names %q#T, which is not a class template",
3005 return error_mark_node;
3007 if (!want_template && TREE_CODE (t) != TYPE_DECL)
3009 if (complain & tf_error)
3010 error ("%<typename %T::%D%> names %q#T, which is not a type",
3012 return error_mark_node;
3015 if (complain & tf_error)
3016 perform_or_defer_access_check (TYPE_BINFO (context), t, t);
3019 return lookup_template_class (t, TREE_OPERAND (fullname, 1),
3021 /*entering_scope=*/0,
3022 tf_warning_or_error | tf_user);
3024 if (DECL_ARTIFICIAL (t) || !(complain & tf_keep_type_decl))
3030 /* Resolve `CONTEXT::template NAME'. Returns a TEMPLATE_DECL if the name
3031 can be resolved or an UNBOUND_CLASS_TEMPLATE, unless an error occurs,
3032 in which case error_mark_node is returned.
3034 If PARM_LIST is non-NULL, also make sure that the template parameter
3035 list of TEMPLATE_DECL matches.
3037 If COMPLAIN zero, don't complain about any errors that occur. */
3040 make_unbound_class_template (tree context, tree name, tree parm_list,
3041 tsubst_flags_t complain)
3047 name = TYPE_IDENTIFIER (name);
3048 else if (DECL_P (name))
3049 name = DECL_NAME (name);
3050 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
3052 if (!dependent_type_p (context)
3053 || currently_open_class (context))
3055 tree tmpl = NULL_TREE;
3057 if (IS_AGGR_TYPE (context))
3058 tmpl = lookup_field (context, name, 0, false);
3060 if (!tmpl || !DECL_CLASS_TEMPLATE_P (tmpl))
3062 if (complain & tf_error)
3063 error ("no class template named %q#T in %q#T", name, context);
3064 return error_mark_node;
3068 && !comp_template_parms (DECL_TEMPLATE_PARMS (tmpl), parm_list))
3070 if (complain & tf_error)
3072 error ("template parameters do not match template");
3073 error ("%q+D declared here", tmpl);
3075 return error_mark_node;
3078 if (complain & tf_error)
3079 perform_or_defer_access_check (TYPE_BINFO (context), tmpl, tmpl);
3084 /* Build the UNBOUND_CLASS_TEMPLATE. */
3085 t = make_aggr_type (UNBOUND_CLASS_TEMPLATE);
3086 TYPE_CONTEXT (t) = FROB_CONTEXT (context);
3087 TREE_TYPE (t) = NULL_TREE;
3088 SET_TYPE_STRUCTURAL_EQUALITY (t);
3090 /* Build the corresponding TEMPLATE_DECL. */
3091 d = build_decl (TEMPLATE_DECL, name, t);
3092 TYPE_NAME (TREE_TYPE (d)) = d;
3093 TYPE_STUB_DECL (TREE_TYPE (d)) = d;
3094 DECL_CONTEXT (d) = FROB_CONTEXT (context);
3095 DECL_ARTIFICIAL (d) = 1;
3096 DECL_TEMPLATE_PARMS (d) = parm_list;
3103 /* Push the declarations of builtin types into the namespace.
3104 RID_INDEX is the index of the builtin type in the array
3105 RID_POINTERS. NAME is the name used when looking up the builtin
3106 type. TYPE is the _TYPE node for the builtin type. */
3109 record_builtin_type (enum rid rid_index,
3113 tree rname = NULL_TREE, tname = NULL_TREE;
3114 tree tdecl = NULL_TREE;
3116 if ((int) rid_index < (int) RID_MAX)
3117 rname = ridpointers[(int) rid_index];
3119 tname = get_identifier (name);
3121 /* The calls to SET_IDENTIFIER_GLOBAL_VALUE below should be
3122 eliminated. Built-in types should not be looked up name; their
3123 names are keywords that the parser can recognize. However, there
3124 is code in c-common.c that uses identifier_global_value to look
3125 up built-in types by name. */
3128 tdecl = build_decl (TYPE_DECL, tname, type);
3129 DECL_ARTIFICIAL (tdecl) = 1;
3130 SET_IDENTIFIER_GLOBAL_VALUE (tname, tdecl);
3136 tdecl = build_decl (TYPE_DECL, rname, type);
3137 DECL_ARTIFICIAL (tdecl) = 1;
3139 SET_IDENTIFIER_GLOBAL_VALUE (rname, tdecl);
3142 if (!TYPE_NAME (type))
3143 TYPE_NAME (type) = tdecl;
3146 debug_hooks->type_decl (tdecl, 0);
3149 /* Record one of the standard Java types.
3150 * Declare it as having the given NAME.
3151 * If SIZE > 0, it is the size of one of the integral types;
3152 * otherwise it is the negative of the size of one of the other types. */
3155 record_builtin_java_type (const char* name, int size)
3159 type = make_signed_type (size);
3160 else if (size > -32)
3161 { /* "__java_char" or ""__java_boolean". */
3162 type = make_unsigned_type (-size);
3163 /*if (size == -1) TREE_SET_CODE (type, BOOLEAN_TYPE);*/
3166 { /* "__java_float" or ""__java_double". */
3167 type = make_node (REAL_TYPE);
3168 TYPE_PRECISION (type) = - size;
3171 record_builtin_type (RID_MAX, name, type);
3172 decl = TYPE_NAME (type);
3174 /* Suppress generate debug symbol entries for these types,
3175 since for normal C++ they are just clutter.
3176 However, push_lang_context undoes this if extern "Java" is seen. */
3177 DECL_IGNORED_P (decl) = 1;
3179 TYPE_FOR_JAVA (type) = 1;
3183 /* Push a type into the namespace so that the back ends ignore it. */
3186 record_unknown_type (tree type, const char* name)
3188 tree decl = pushdecl (build_decl (TYPE_DECL, get_identifier (name), type));
3189 /* Make sure the "unknown type" typedecl gets ignored for debug info. */
3190 DECL_IGNORED_P (decl) = 1;
3191 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
3192 TYPE_SIZE (type) = TYPE_SIZE (void_type_node);
3193 TYPE_ALIGN (type) = 1;
3194 TYPE_USER_ALIGN (type) = 0;
3195 TYPE_MODE (type) = TYPE_MODE (void_type_node);
3198 /* A string for which we should create an IDENTIFIER_NODE at
3201 typedef struct predefined_identifier
3203 /* The name of the identifier. */
3204 const char *const name;
3205 /* The place where the IDENTIFIER_NODE should be stored. */
3207 /* Nonzero if this is the name of a constructor or destructor. */
3208 const int ctor_or_dtor_p;
3209 } predefined_identifier;
3211 /* Create all the predefined identifiers. */
3214 initialize_predefined_identifiers (void)
3216 const predefined_identifier *pid;
3218 /* A table of identifiers to create at startup. */
3219 static const predefined_identifier predefined_identifiers[] = {
3220 { "C++", &lang_name_cplusplus, 0 },
3221 { "C", &lang_name_c, 0 },
3222 { "Java", &lang_name_java, 0 },
3223 /* Some of these names have a trailing space so that it is
3224 impossible for them to conflict with names written by users. */
3225 { "__ct ", &ctor_identifier, 1 },
3226 { "__base_ctor ", &base_ctor_identifier, 1 },
3227 { "__comp_ctor ", &complete_ctor_identifier, 1 },
3228 { "__dt ", &dtor_identifier, 1 },
3229 { "__comp_dtor ", &complete_dtor_identifier, 1 },
3230 { "__base_dtor ", &base_dtor_identifier, 1 },
3231 { "__deleting_dtor ", &deleting_dtor_identifier, 1 },
3232 { IN_CHARGE_NAME, &in_charge_identifier, 0 },
3233 { "nelts", &nelts_identifier, 0 },
3234 { THIS_NAME, &this_identifier, 0 },
3235 { VTABLE_DELTA_NAME, &delta_identifier, 0 },
3236 { VTABLE_PFN_NAME, &pfn_identifier, 0 },
3237 { "_vptr", &vptr_identifier, 0 },
3238 { "__vtt_parm", &vtt_parm_identifier, 0 },
3239 { "::", &global_scope_name, 0 },
3240 { "std", &std_identifier, 0 },
3244 for (pid = predefined_identifiers; pid->name; ++pid)
3246 *pid->node = get_identifier (pid->name);
3247 if (pid->ctor_or_dtor_p)
3248 IDENTIFIER_CTOR_OR_DTOR_P (*pid->node) = 1;
3252 /* Create the predefined scalar types of C,
3253 and some nodes representing standard constants (0, 1, (void *)0).
3254 Initialize the global binding level.
3255 Make definitions for built-in primitive functions. */
3258 cxx_init_decl_processing (void)
3261 tree void_ftype_ptr;
3263 build_common_tree_nodes (flag_signed_char, false);
3265 /* Create all the identifiers we need. */
3266 initialize_predefined_identifiers ();
3268 /* Create the global variables. */
3269 push_to_top_level ();
3271 current_function_decl = NULL_TREE;
3272 current_binding_level = NULL;
3273 /* Enter the global namespace. */
3274 gcc_assert (global_namespace == NULL_TREE);
3275 global_namespace = build_lang_decl (NAMESPACE_DECL, global_scope_name,
3277 TREE_PUBLIC (global_namespace) = 1;
3278 begin_scope (sk_namespace, global_namespace);
3280 current_lang_name = NULL_TREE;
3282 if (flag_visibility_ms_compat)
3283 default_visibility = VISIBILITY_HIDDEN;
3286 current_lang_name = lang_name_c;
3288 /* Create the `std' namespace. */
3289 push_namespace (std_identifier);
3290 std_node = current_namespace;
3293 c_common_nodes_and_builtins ();
3295 java_byte_type_node = record_builtin_java_type ("__java_byte", 8);
3296 java_short_type_node = record_builtin_java_type ("__java_short", 16);
3297 java_int_type_node = record_builtin_java_type ("__java_int", 32);
3298 java_long_type_node = record_builtin_java_type ("__java_long", 64);
3299 java_float_type_node = record_builtin_java_type ("__java_float", -32);
3300 java_double_type_node = record_builtin_java_type ("__java_double", -64);
3301 java_char_type_node = record_builtin_java_type ("__java_char", -16);
3302 java_boolean_type_node = record_builtin_java_type ("__java_boolean", -1);
3304 integer_two_node = build_int_cst (NULL_TREE, 2);
3305 integer_three_node = build_int_cst (NULL_TREE, 3);
3307 record_builtin_type (RID_BOOL, "bool", boolean_type_node);
3308 truthvalue_type_node = boolean_type_node;
3309 truthvalue_false_node = boolean_false_node;
3310 truthvalue_true_node = boolean_true_node;
3312 empty_except_spec = build_tree_list (NULL_TREE, NULL_TREE);
3315 record_builtin_type (RID_MAX, NULL, string_type_node);
3318 delta_type_node = ptrdiff_type_node;
3319 vtable_index_type = ptrdiff_type_node;
3321 vtt_parm_type = build_pointer_type (const_ptr_type_node);
3322 void_ftype = build_function_type (void_type_node, void_list_node);
3323 void_ftype_ptr = build_function_type (void_type_node,
3324 tree_cons (NULL_TREE,
3328 = build_exception_variant (void_ftype_ptr, empty_except_spec);
3330 /* C++ extensions */
3332 unknown_type_node = make_node (UNKNOWN_TYPE);
3333 record_unknown_type (unknown_type_node, "unknown type");
3335 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
3336 TREE_TYPE (unknown_type_node) = unknown_type_node;
3338 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
3340 TYPE_POINTER_TO (unknown_type_node) = unknown_type_node;
3341 TYPE_REFERENCE_TO (unknown_type_node) = unknown_type_node;
3344 /* Make sure we get a unique function type, so we can give
3345 its pointer type a name. (This wins for gdb.) */
3346 tree vfunc_type = make_node (FUNCTION_TYPE);
3347 TREE_TYPE (vfunc_type) = integer_type_node;
3348 TYPE_ARG_TYPES (vfunc_type) = NULL_TREE;
3349 layout_type (vfunc_type);
3351 vtable_entry_type = build_pointer_type (vfunc_type);
3353 record_builtin_type (RID_MAX, VTBL_PTR_TYPE, vtable_entry_type);
3356 = build_cplus_array_type (vtable_entry_type, NULL_TREE);
3357 layout_type (vtbl_type_node);
3358 vtbl_type_node = build_qualified_type (vtbl_type_node, TYPE_QUAL_CONST);
3359 record_builtin_type (RID_MAX, NULL, vtbl_type_node);
3360 vtbl_ptr_type_node = build_pointer_type (vtable_entry_type);
3361 layout_type (vtbl_ptr_type_node);
3362 record_builtin_type (RID_MAX, NULL, vtbl_ptr_type_node);
3364 push_namespace (get_identifier ("__cxxabiv1"));
3365 abi_node = current_namespace;
3368 global_type_node = make_node (LANG_TYPE);
3369 record_unknown_type (global_type_node, "global type");
3372 current_lang_name = lang_name_cplusplus;
3376 tree bad_alloc_type_node;
3377 tree bad_alloc_decl;
3378 tree newtype, deltype;
3379 tree ptr_ftype_sizetype;
3381 push_namespace (std_identifier);
3382 bad_alloc_id = get_identifier ("bad_alloc");
3383 bad_alloc_type_node = make_aggr_type (RECORD_TYPE);
3384 TYPE_CONTEXT (bad_alloc_type_node) = current_namespace;
3386 = create_implicit_typedef (bad_alloc_id, bad_alloc_type_node);
3387 DECL_CONTEXT (bad_alloc_decl) = current_namespace;
3388 TYPE_STUB_DECL (bad_alloc_type_node) = bad_alloc_decl;
3392 = build_function_type (ptr_type_node,
3393 tree_cons (NULL_TREE,
3396 newtype = build_exception_variant
3397 (ptr_ftype_sizetype, add_exception_specifier
3398 (NULL_TREE, bad_alloc_type_node, -1));
3399 deltype = build_exception_variant (void_ftype_ptr, empty_except_spec);
3400 push_cp_library_fn (NEW_EXPR, newtype);
3401 push_cp_library_fn (VEC_NEW_EXPR, newtype);
3402 global_delete_fndecl = push_cp_library_fn (DELETE_EXPR, deltype);
3403 push_cp_library_fn (VEC_DELETE_EXPR, deltype);
3407 = build_library_fn_ptr ("__cxa_pure_virtual", void_ftype);
3409 /* Perform other language dependent initializations. */
3410 init_class_processing ();
3411 init_rtti_processing ();
3413 if (flag_exceptions)
3414 init_exception_processing ();
3416 if (! supports_one_only ())
3419 make_fname_decl = cp_make_fname_decl;
3420 start_fname_decls ();
3422 /* Show we use EH for cleanups. */
3423 if (flag_exceptions)
3424 using_eh_for_cleanups ();
3427 /* Generate an initializer for a function naming variable from
3428 NAME. NAME may be NULL, to indicate a dependent name. TYPE_P is
3429 filled in with the type of the init. */
3432 cp_fname_init (const char* name, tree *type_p)
3434 tree domain = NULL_TREE;
3436 tree init = NULL_TREE;
3441 length = strlen (name);
3442 domain = build_index_type (size_int (length));
3443 init = build_string (length + 1, name);
3446 type = build_qualified_type (char_type_node, TYPE_QUAL_CONST);
3447 type = build_cplus_array_type (type, domain);
3452 TREE_TYPE (init) = type;
3454 init = error_mark_node;
3459 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give the
3460 decl, NAME is the initialization string and TYPE_DEP indicates whether
3461 NAME depended on the type of the function. We make use of that to detect
3462 __PRETTY_FUNCTION__ inside a template fn. This is being done
3463 lazily at the point of first use, so we mustn't push the decl now. */
3466 cp_make_fname_decl (tree id, int type_dep)
3468 const char *const name = (type_dep && processing_template_decl
3469 ? NULL : fname_as_string (type_dep));
3471 tree init = cp_fname_init (name, &type);
3472 tree decl = build_decl (VAR_DECL, id, type);
3475 free (CONST_CAST (char *, name));
3477 /* As we're using pushdecl_with_scope, we must set the context. */
3478 DECL_CONTEXT (decl) = current_function_decl;
3479 DECL_PRETTY_FUNCTION_P (decl) = type_dep;
3481 TREE_STATIC (decl) = 1;
3482 TREE_READONLY (decl) = 1;
3483 DECL_ARTIFICIAL (decl) = 1;
3485 TREE_USED (decl) = 1;
3487 if (current_function_decl)
3489 struct cp_binding_level *b = current_binding_level;
3490 while (b->level_chain->kind != sk_function_parms)
3492 pushdecl_with_scope (decl, b, /*is_friend=*/false);
3493 cp_finish_decl (decl, init, /*init_const_expr_p=*/false, NULL_TREE,
3494 LOOKUP_ONLYCONVERTING);
3497 pushdecl_top_level_and_finish (decl, init);
3503 builtin_function_1 (tree decl, tree context)
3505 tree id = DECL_NAME (decl);
3506 const char *name = IDENTIFIER_POINTER (id);
3508 retrofit_lang_decl (decl);
3510 /* All nesting of C++ functions is lexical; there is never a "static
3511 chain" in the sense of GNU C nested functions. */
3512 DECL_NO_STATIC_CHAIN (decl) = 1;
3514 DECL_ARTIFICIAL (decl) = 1;
3515 SET_OVERLOADED_OPERATOR_CODE (decl, ERROR_MARK);
3516 SET_DECL_LANGUAGE (decl, lang_c);
3517 /* Runtime library routines are, by definition, available in an
3518 external shared object. */
3519 DECL_VISIBILITY (decl) = VISIBILITY_DEFAULT;
3520 DECL_VISIBILITY_SPECIFIED (decl) = 1;
3522 DECL_CONTEXT (decl) = context;
3526 /* A function in the user's namespace should have an explicit
3527 declaration before it is used. Mark the built-in function as
3528 anticipated but not actually declared. */
3529 if (name[0] != '_' || name[1] != '_')
3530 DECL_ANTICIPATED (decl) = 1;
3531 else if (strncmp (name + 2, "builtin_", strlen ("builtin_")) != 0)
3533 size_t len = strlen (name);
3535 /* Treat __*_chk fortification functions as anticipated as well,
3536 unless they are __builtin_*. */
3537 if (len > strlen ("___chk")
3538 && memcmp (name + len - strlen ("_chk"),
3539 "_chk", strlen ("_chk") + 1) == 0)
3540 DECL_ANTICIPATED (decl) = 1;
3547 cxx_builtin_function (tree decl)
3549 tree id = DECL_NAME (decl);
3550 const char *name = IDENTIFIER_POINTER (id);
3551 /* All builtins that don't begin with an '_' should additionally
3552 go in the 'std' namespace. */
3555 tree decl2 = copy_node(decl);
3556 push_namespace (std_identifier);
3557 builtin_function_1 (decl2, std_node);
3561 return builtin_function_1 (decl, NULL_TREE);
3564 /* Generate a FUNCTION_DECL with the typical flags for a runtime library
3565 function. Not called directly. */
3568 build_library_fn_1 (tree name, enum tree_code operator_code, tree type)
3570 tree fn = build_lang_decl (FUNCTION_DECL, name, type);
3571 DECL_EXTERNAL (fn) = 1;
3572 TREE_PUBLIC (fn) = 1;
3573 DECL_ARTIFICIAL (fn) = 1;
3574 SET_OVERLOADED_OPERATOR_CODE (fn, operator_code);
3575 SET_DECL_LANGUAGE (fn, lang_c);
3576 /* Runtime library routines are, by definition, available in an
3577 external shared object. */
3578 DECL_VISIBILITY (fn) = VISIBILITY_DEFAULT;
3579 DECL_VISIBILITY_SPECIFIED (fn) = 1;
3583 /* Returns the _DECL for a library function with C linkage.
3584 We assume that such functions never throw; if this is incorrect,
3585 callers should unset TREE_NOTHROW. */
3588 build_library_fn (tree name, tree type)
3590 tree fn = build_library_fn_1 (name, ERROR_MARK, type);
3591 TREE_NOTHROW (fn) = 1;
3595 /* Returns the _DECL for a library function with C++ linkage. */
3598 build_cp_library_fn (tree name, enum tree_code operator_code, tree type)
3600 tree fn = build_library_fn_1 (name, operator_code, type);
3601 TREE_NOTHROW (fn) = TYPE_NOTHROW_P (type);
3602 DECL_CONTEXT (fn) = FROB_CONTEXT (current_namespace);
3603 SET_DECL_LANGUAGE (fn, lang_cplusplus);
3607 /* Like build_library_fn, but takes a C string instead of an
3611 build_library_fn_ptr (const char* name, tree type)
3613 return build_library_fn (get_identifier (name), type);
3616 /* Like build_cp_library_fn, but takes a C string instead of an
3620 build_cp_library_fn_ptr (const char* name, tree type)
3622 return build_cp_library_fn (get_identifier (name), ERROR_MARK, type);
3625 /* Like build_library_fn, but also pushes the function so that we will
3626 be able to find it via IDENTIFIER_GLOBAL_VALUE. */
3629 push_library_fn (tree name, tree type)
3631 tree fn = build_library_fn (name, type);
3632 pushdecl_top_level (fn);
3636 /* Like build_cp_library_fn, but also pushes the function so that it
3637 will be found by normal lookup. */
3640 push_cp_library_fn (enum tree_code operator_code, tree type)
3642 tree fn = build_cp_library_fn (ansi_opname (operator_code),
3649 /* Like push_library_fn, but takes a TREE_LIST of parm types rather than
3653 push_void_library_fn (tree name, tree parmtypes)
3655 tree type = build_function_type (void_type_node, parmtypes);
3656 return push_library_fn (name, type);
3659 /* Like push_library_fn, but also note that this function throws
3660 and does not return. Used for __throw_foo and the like. */
3663 push_throw_library_fn (tree name, tree type)
3665 tree fn = push_library_fn (name, type);
3666 TREE_THIS_VOLATILE (fn) = 1;
3667 TREE_NOTHROW (fn) = 0;
3671 /* When we call finish_struct for an anonymous union, we create
3672 default copy constructors and such. But, an anonymous union
3673 shouldn't have such things; this function undoes the damage to the
3674 anonymous union type T.
3676 (The reason that we create the synthesized methods is that we don't
3677 distinguish `union { int i; }' from `typedef union { int i; } U'.
3678 The first is an anonymous union; the second is just an ordinary
3682 fixup_anonymous_aggr (tree t)
3686 /* Wipe out memory of synthesized methods. */
3687 TYPE_HAS_CONSTRUCTOR (t) = 0;
3688 TYPE_HAS_DEFAULT_CONSTRUCTOR (t) = 0;
3689 TYPE_HAS_INIT_REF (t) = 0;
3690 TYPE_HAS_CONST_INIT_REF (t) = 0;
3691 TYPE_HAS_ASSIGN_REF (t) = 0;
3692 TYPE_HAS_CONST_ASSIGN_REF (t) = 0;
3694 /* Splice the implicitly generated functions out of the TYPE_METHODS
3696 q = &TYPE_METHODS (t);
3699 if (DECL_ARTIFICIAL (*q))
3700 *q = TREE_CHAIN (*q);
3702 q = &TREE_CHAIN (*q);
3705 /* ISO C++ 9.5.3. Anonymous unions may not have function members. */
3706 if (TYPE_METHODS (t))
3708 tree decl = TYPE_MAIN_DECL (t);
3710 if (TREE_CODE (t) != UNION_TYPE)
3711 error ("%Jan anonymous struct cannot have function members", decl);
3713 error ("%Jan anonymous union cannot have function members", decl);
3716 /* Anonymous aggregates cannot have fields with ctors, dtors or complex
3717 assignment operators (because they cannot have these methods themselves).
3718 For anonymous unions this is already checked because they are not allowed
3719 in any union, otherwise we have to check it. */
3720 if (TREE_CODE (t) != UNION_TYPE)
3724 for (field = TYPE_FIELDS (t); field; field = TREE_CHAIN (field))
3725 if (TREE_CODE (field) == FIELD_DECL)
3727 type = TREE_TYPE (field);
3728 if (CLASS_TYPE_P (type))
3730 if (TYPE_NEEDS_CONSTRUCTING (type))
3731 error ("member %q+#D with constructor not allowed "
3732 "in anonymous aggregate", field);
3733 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
3734 error ("member %q+#D with destructor not allowed "
3735 "in anonymous aggregate", field);
3736 if (TYPE_HAS_COMPLEX_ASSIGN_REF (type))
3737 error ("member %q+#D with copy assignment operator "
3738 "not allowed in anonymous aggregate", field);
3744 /* Make sure that a declaration with no declarator is well-formed, i.e.
3745 just declares a tagged type or anonymous union.
3747 Returns the type declared; or NULL_TREE if none. */
3750 check_tag_decl (cp_decl_specifier_seq *declspecs)
3752 int saw_friend = declspecs->specs[(int)ds_friend] != 0;
3753 int saw_typedef = declspecs->specs[(int)ds_typedef] != 0;
3754 /* If a class, struct, or enum type is declared by the DECLSPECS
3755 (i.e, if a class-specifier, enum-specifier, or non-typename
3756 elaborated-type-specifier appears in the DECLSPECS),
3757 DECLARED_TYPE is set to the corresponding type. */
3758 tree declared_type = NULL_TREE;
3759 bool error_p = false;
3761 if (declspecs->multiple_types_p)
3762 error ("multiple types in one declaration");
3763 else if (declspecs->redefined_builtin_type)
3765 if (!in_system_header)
3766 pedwarn ("redeclaration of C++ built-in type %qT",
3767 declspecs->redefined_builtin_type);
3772 && TYPE_P (declspecs->type)
3773 && ((TREE_CODE (declspecs->type) != TYPENAME_TYPE
3774 && IS_AGGR_TYPE (declspecs->type))
3775 || TREE_CODE (declspecs->type) == ENUMERAL_TYPE))
3776 declared_type = declspecs->type;
3777 else if (declspecs->type == error_mark_node)
3779 if (declared_type == NULL_TREE && ! saw_friend && !error_p)
3780 pedwarn ("declaration does not declare anything");
3781 /* Check for an anonymous union. */
3782 else if (declared_type && IS_AGGR_TYPE_CODE (TREE_CODE (declared_type))
3783 && TYPE_ANONYMOUS_P (declared_type))
3785 /* 7/3 In a simple-declaration, the optional init-declarator-list
3786 can be omitted only when declaring a class (clause 9) or
3787 enumeration (7.2), that is, when the decl-specifier-seq contains
3788 either a class-specifier, an elaborated-type-specifier with
3789 a class-key (9.1), or an enum-specifier. In these cases and
3790 whenever a class-specifier or enum-specifier is present in the
3791 decl-specifier-seq, the identifiers in these specifiers are among
3792 the names being declared by the declaration (as class-name,
3793 enum-names, or enumerators, depending on the syntax). In such
3794 cases, and except for the declaration of an unnamed bit-field (9.6),
3795 the decl-specifier-seq shall introduce one or more names into the
3796 program, or shall redeclare a name introduced by a previous
3797 declaration. [Example:
3798 enum { }; // ill-formed
3799 typedef class { }; // ill-formed
3803 error ("missing type-name in typedef-declaration");
3806 /* Anonymous unions are objects, so they can have specifiers. */;
3807 SET_ANON_AGGR_TYPE_P (declared_type);
3809 if (TREE_CODE (declared_type) != UNION_TYPE && pedantic
3810 && !in_system_header)
3811 pedwarn ("ISO C++ prohibits anonymous structs");
3816 if (declspecs->specs[(int)ds_inline]
3817 || declspecs->specs[(int)ds_virtual])
3818 error ("%qs can only be specified for functions",
3819 declspecs->specs[(int)ds_inline]
3820 ? "inline" : "virtual");
3822 && (!current_class_type
3823 || current_scope () != current_class_type))
3824 error ("%<friend%> can only be specified inside a class");
3825 else if (declspecs->specs[(int)ds_explicit])
3826 error ("%<explicit%> can only be specified for constructors");
3827 else if (declspecs->storage_class)
3828 error ("a storage class can only be specified for objects "
3830 else if (declspecs->specs[(int)ds_const]
3831 || declspecs->specs[(int)ds_volatile]
3832 || declspecs->specs[(int)ds_restrict]
3833 || declspecs->specs[(int)ds_thread])
3834 error ("qualifiers can only be specified for objects "
3836 else if (saw_typedef)
3837 warning (0, "%<typedef%> was ignored in this declaration");
3840 return declared_type;
3843 /* Called when a declaration is seen that contains no names to declare.
3844 If its type is a reference to a structure, union or enum inherited
3845 from a containing scope, shadow that tag name for the current scope
3846 with a forward reference.
3847 If its type defines a new named structure or union
3848 or defines an enum, it is valid but we need not do anything here.
3849 Otherwise, it is an error.
3851 C++: may have to grok the declspecs to learn about static,
3852 complain for anonymous unions.
3854 Returns the TYPE declared -- or NULL_TREE if none. */
3857 shadow_tag (cp_decl_specifier_seq *declspecs)
3859 tree t = check_tag_decl (declspecs);
3864 if (declspecs->attributes)
3866 warning (0, "attribute ignored in declaration of %q+#T", t);
3867 warning (0, "attribute for %q+#T must follow the %qs keyword",
3868 t, class_key_or_enum_as_string (t));
3872 if (maybe_process_partial_specialization (t) == error_mark_node)
3875 /* This is where the variables in an anonymous union are
3876 declared. An anonymous union declaration looks like:
3878 because there is no declarator after the union, the parser
3879 sends that declaration here. */
3880 if (ANON_AGGR_TYPE_P (t))
3882 fixup_anonymous_aggr (t);
3884 if (TYPE_FIELDS (t))
3886 tree decl = grokdeclarator (/*declarator=*/NULL,
3887 declspecs, NORMAL, 0, NULL);
3888 finish_anon_union (decl);
3895 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
3898 groktypename (cp_decl_specifier_seq *type_specifiers,
3899 const cp_declarator *declarator)
3903 attrs = type_specifiers->attributes;
3904 type_specifiers->attributes = NULL_TREE;
3905 type = grokdeclarator (declarator, type_specifiers, TYPENAME, 0, &attrs);
3908 if (CLASS_TYPE_P (type))
3909 warning (OPT_Wattributes, "ignoring attributes applied to class type "
3910 "outside of definition");
3912 cplus_decl_attributes (&type, attrs, 0);
3917 /* Process a DECLARATOR for a function-scope variable declaration,
3918 namespace-scope variable declaration, or function declaration.
3919 (Function definitions go through start_function; class member
3920 declarations appearing in the body of the class go through
3921 grokfield.) The DECL corresponding to the DECLARATOR is returned.
3922 If an error occurs, the error_mark_node is returned instead.
3924 DECLSPECS are the decl-specifiers for the declaration. INITIALIZED
3925 is true if an explicit initializer is present, but false if this is
3926 a variable implicitly initialized via a default constructor.
3927 ATTRIBUTES and PREFIX_ATTRIBUTES are GNU attributes associated with
3928 this declaration. *PUSHED_SCOPE_P is set to the scope entered in
3929 this function, if any; if set, the caller is responsible for
3930 calling pop_scope. */
3933 start_decl (const cp_declarator *declarator,
3934 cp_decl_specifier_seq *declspecs,
3937 tree prefix_attributes,
3938 tree *pushed_scope_p)
3945 *pushed_scope_p = NULL_TREE;
3947 /* An object declared as __attribute__((deprecated)) suppresses
3948 warnings of uses of other deprecated items. */
3949 if (lookup_attribute ("deprecated", attributes))
3950 deprecated_state = DEPRECATED_SUPPRESS;
3952 attributes = chainon (attributes, prefix_attributes);
3954 decl = grokdeclarator (declarator, declspecs, NORMAL, initialized,
3957 deprecated_state = DEPRECATED_NORMAL;
3959 if (decl == NULL_TREE || TREE_CODE (decl) == VOID_TYPE
3960 || decl == error_mark_node)
3961 return error_mark_node;
3963 type = TREE_TYPE (decl);
3965 context = DECL_CONTEXT (decl);
3969 *pushed_scope_p = push_scope (context);
3971 /* We are only interested in class contexts, later. */
3972 if (TREE_CODE (context) == NAMESPACE_DECL)
3973 context = NULL_TREE;
3977 /* Is it valid for this decl to have an initializer at all?
3978 If not, set INITIALIZED to zero, which will indirectly
3979 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
3980 switch (TREE_CODE (decl))
3983 error ("typedef %qD is initialized (use __typeof__ instead)", decl);
3984 return error_mark_node;
3987 error ("function %q#D is initialized like a variable", decl);
3988 return error_mark_node;
3996 if (! toplevel_bindings_p ()
3997 && DECL_EXTERNAL (decl))
3998 warning (0, "declaration of %q#D has %<extern%> and is initialized",
4000 DECL_EXTERNAL (decl) = 0;
4001 if (toplevel_bindings_p ())
4002 TREE_STATIC (decl) = 1;
4005 /* Set attributes here so if duplicate decl, will have proper attributes. */
4006 cplus_decl_attributes (&decl, attributes, 0);
4008 /* Dllimported symbols cannot be defined. Static data members (which
4009 can be initialized in-class and dllimported) go through grokfield,
4010 not here, so we don't need to exclude those decls when checking for
4012 if (initialized && DECL_DLLIMPORT_P (decl))
4014 error ("definition of %q#D is marked %<dllimport%>", decl);
4015 DECL_DLLIMPORT_P (decl) = 0;
4018 /* If #pragma weak was used, mark the decl weak now. */
4019 maybe_apply_pragma_weak (decl);
4021 if (TREE_CODE (decl) == FUNCTION_DECL
4022 && DECL_DECLARED_INLINE_P (decl)
4023 && DECL_UNINLINABLE (decl)
4024 && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl)))
4025 warning (0, "inline function %q+D given attribute noinline", decl);
4027 if (context && COMPLETE_TYPE_P (complete_type (context)))
4029 if (TREE_CODE (decl) == VAR_DECL)
4031 tree field = lookup_field (context, DECL_NAME (decl), 0, false);
4032 if (field == NULL_TREE || TREE_CODE (field) != VAR_DECL)
4033 error ("%q#D is not a static member of %q#T", decl, context);
4036 if (DECL_CONTEXT (field) != context)
4038 if (!same_type_p (DECL_CONTEXT (field), context))
4039 pedwarn ("ISO C++ does not permit %<%T::%D%> "
4040 "to be defined as %<%T::%D%>",
4041 DECL_CONTEXT (field), DECL_NAME (decl),
4042 context, DECL_NAME (decl));
4043 DECL_CONTEXT (decl) = DECL_CONTEXT (field);
4045 if (processing_specialization
4046 && template_class_depth (context) == 0
4047 && CLASSTYPE_TEMPLATE_SPECIALIZATION (context))
4048 error ("template header not allowed in member definition "
4049 "of explicitly specialized class");
4050 /* Static data member are tricky; an in-class initialization
4051 still doesn't provide a definition, so the in-class
4052 declaration will have DECL_EXTERNAL set, but will have an
4053 initialization. Thus, duplicate_decls won't warn
4054 about this situation, and so we check here. */
4055 if (initialized && DECL_INITIALIZED_IN_CLASS_P (field))
4056 error ("duplicate initialization of %qD", decl);
4057 if (duplicate_decls (decl, field, /*newdecl_is_friend=*/false))
4063 tree field = check_classfn (context, decl,
4064 (processing_template_decl
4065 > template_class_depth (context))
4066 ? current_template_parms
4068 if (field && field != error_mark_node
4069 && duplicate_decls (decl, field,
4070 /*newdecl_is_friend=*/false))
4074 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
4075 DECL_IN_AGGR_P (decl) = 0;
4076 /* Do not mark DECL as an explicit specialization if it was not
4077 already marked as an instantiation; a declaration should
4078 never be marked as a specialization unless we know what
4079 template is being specialized. */
4080 if (DECL_LANG_SPECIFIC (decl) && DECL_USE_TEMPLATE (decl))
4082 SET_DECL_TEMPLATE_SPECIALIZATION (decl);
4084 /* [temp.expl.spec] An explicit specialization of a static data
4085 member of a template is a definition if the declaration
4086 includes an initializer; otherwise, it is a declaration.
4088 We check for processing_specialization so this only applies
4089 to the new specialization syntax. */
4090 if (!initialized && processing_specialization)
4091 DECL_EXTERNAL (decl) = 1;
4094 if (DECL_EXTERNAL (decl) && ! DECL_TEMPLATE_SPECIALIZATION (decl))
4095 pedwarn ("declaration of %q#D outside of class is not definition",
4099 was_public = TREE_PUBLIC (decl);
4101 /* Enter this declaration into the symbol table. */
4102 decl = maybe_push_decl (decl);
4104 if (processing_template_decl)
4105 decl = push_template_decl (decl);
4106 if (decl == error_mark_node)
4107 return error_mark_node;
4109 /* Tell the back end to use or not use .common as appropriate. If we say
4110 -fconserve-space, we want this to save .data space, at the expense of
4111 wrong semantics. If we say -fno-conserve-space, we want this to
4112 produce errors about redefs; to do this we force variables into the
4114 if (flag_conserve_space
4115 && TREE_CODE (decl) == VAR_DECL
4116 && TREE_PUBLIC (decl)
4117 && !DECL_THREAD_LOCAL_P (decl)
4118 && !have_global_bss_p ())
4119 DECL_COMMON (decl) = 1;
4121 if (TREE_CODE (decl) == VAR_DECL
4122 && DECL_NAMESPACE_SCOPE_P (decl) && !TREE_PUBLIC (decl) && !was_public
4123 && !DECL_THIS_STATIC (decl) && !DECL_ARTIFICIAL (decl))
4125 /* This is a const variable with implicit 'static'. Set
4126 DECL_THIS_STATIC so we can tell it from variables that are
4127 !TREE_PUBLIC because of the anonymous namespace. */
4128 gcc_assert (cp_type_readonly (TREE_TYPE (decl)));
4129 DECL_THIS_STATIC (decl) = 1;
4132 if (!processing_template_decl && TREE_CODE (decl) == VAR_DECL)
4133 start_decl_1 (decl, initialized);
4138 /* Process the declaration of a variable DECL. INITIALIZED is true
4139 iff DECL is explicitly initialized. (INITIALIZED is false if the
4140 variable is initialized via an implicitly-called constructor.)
4141 This function must be called for ordinary variables (including, for
4142 example, implicit instantiations of templates), but must not be
4143 called for template declarations. */
4146 start_decl_1 (tree decl, bool initialized)
4150 bool aggregate_definition_p;
4152 gcc_assert (!processing_template_decl);
4154 if (error_operand_p (decl))
4157 gcc_assert (TREE_CODE (decl) == VAR_DECL);
4159 type = TREE_TYPE (decl);
4160 complete_p = COMPLETE_TYPE_P (type);
4161 aggregate_definition_p = IS_AGGR_TYPE (type) && !DECL_EXTERNAL (decl);
4163 /* If an explicit initializer is present, or if this is a definition
4164 of an aggregate, then we need a complete type at this point.
4165 (Scalars are always complete types, so there is nothing to
4166 check.) This code just sets COMPLETE_P; errors (if necessary)
4167 are issued below. */
4168 if ((initialized || aggregate_definition_p)
4170 && COMPLETE_TYPE_P (complete_type (type)))
4173 /* We will not yet have set TREE_READONLY on DECL if the type
4174 was "const", but incomplete, before this point. But, now, we
4175 have a complete type, so we can try again. */
4176 cp_apply_type_quals_to_decl (cp_type_quals (type), decl);
4180 /* Is it valid for this decl to have an initializer at all? */
4182 /* Don't allow initializations for incomplete types except for
4183 arrays which might be completed by the initialization. */
4185 ; /* A complete type is ok. */
4186 else if (TREE_CODE (type) != ARRAY_TYPE)
4188 error ("variable %q#D has initializer but incomplete type", decl);
4189 type = TREE_TYPE (decl) = error_mark_node;
4191 else if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (type))))
4193 if (DECL_LANG_SPECIFIC (decl) && DECL_TEMPLATE_INFO (decl))
4194 error ("elements of array %q#D have incomplete type", decl);
4195 /* else we already gave an error in start_decl. */
4198 else if (aggregate_definition_p && !complete_p)
4200 error ("aggregate %q#D has incomplete type and cannot be defined",
4202 /* Change the type so that assemble_variable will give
4203 DECL an rtl we can live with: (mem (const_int 0)). */
4204 type = TREE_TYPE (decl) = error_mark_node;
4207 /* Create a new scope to hold this declaration if necessary.
4208 Whether or not a new scope is necessary cannot be determined
4209 until after the type has been completed; if the type is a
4210 specialization of a class template it is not until after
4211 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
4212 will be set correctly. */
4213 maybe_push_cleanup_level (type);
4216 /* Handle initialization of references. DECL, TYPE, and INIT have the
4217 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
4218 but will be set to a new CLEANUP_STMT if a temporary is created
4219 that must be destroyed subsequently.
4221 Returns an initializer expression to use to initialize DECL, or
4222 NULL if the initialization can be performed statically.
4224 Quotes on semantics can be found in ARM 8.4.3. */
4227 grok_reference_init (tree decl, tree type, tree init, tree *cleanup)
4231 if (init == NULL_TREE)
4233 if ((DECL_LANG_SPECIFIC (decl) == 0
4234 || DECL_IN_AGGR_P (decl) == 0)
4235 && ! DECL_THIS_EXTERN (decl))
4236 error ("%qD declared as reference but not initialized", decl);
4240 if (TREE_CODE (init) == CONSTRUCTOR)
4242 error ("ISO C++ forbids use of initializer list to "
4243 "initialize reference %qD", decl);
4247 if (TREE_CODE (init) == TREE_LIST)
4248 init = build_x_compound_expr_from_list (init, "initializer");
4250 if (TREE_CODE (TREE_TYPE (type)) != ARRAY_TYPE
4251 && TREE_CODE (TREE_TYPE (init)) == ARRAY_TYPE)
4252 /* Note: default conversion is only called in very special cases. */
4253 init = decay_conversion (init);
4255 /* Convert INIT to the reference type TYPE. This may involve the
4256 creation of a temporary, whose lifetime must be the same as that
4257 of the reference. If so, a DECL_EXPR for the temporary will be
4258 added just after the DECL_EXPR for DECL. That's why we don't set
4259 DECL_INITIAL for local references (instead assigning to them
4260 explicitly); we need to allow the temporary to be initialized
4262 tmp = initialize_reference (type, init, decl, cleanup);
4264 if (tmp == error_mark_node)
4266 else if (tmp == NULL_TREE)
4268 error ("cannot initialize %qT from %qT", type, TREE_TYPE (init));
4272 if (TREE_STATIC (decl) && !TREE_CONSTANT (tmp))
4275 DECL_INITIAL (decl) = tmp;
4280 /* Designated initializers in arrays are not supported in GNU C++.
4281 The parser cannot detect this error since it does not know whether
4282 a given brace-enclosed initializer is for a class type or for an
4283 array. This function checks that CE does not use a designated
4284 initializer. If it does, an error is issued. Returns true if CE
4285 is valid, i.e., does not have a designated initializer. */
4288 check_array_designated_initializer (const constructor_elt *ce)
4290 /* Designated initializers for array elements are not supported. */
4293 /* The parser only allows identifiers as designated
4295 gcc_assert (TREE_CODE (ce->index) == IDENTIFIER_NODE);
4296 error ("name %qD used in a GNU-style designated "
4297 "initializer for an array", ce->index);
4304 /* When parsing `int a[] = {1, 2};' we don't know the size of the
4305 array until we finish parsing the initializer. If that's the
4306 situation we're in, update DECL accordingly. */
4309 maybe_deduce_size_from_array_init (tree decl, tree init)
4311 tree type = TREE_TYPE (decl);
4313 if (TREE_CODE (type) == ARRAY_TYPE
4314 && TYPE_DOMAIN (type) == NULL_TREE
4315 && TREE_CODE (decl) != TYPE_DECL)
4317 /* do_default is really a C-ism to deal with tentative definitions.
4318 But let's leave it here to ease the eventual merge. */
4319 int do_default = !DECL_EXTERNAL (decl);
4320 tree initializer = init ? init : DECL_INITIAL (decl);
4323 /* Check that there are no designated initializers in INIT, as
4324 those are not supported in GNU C++, and as the middle-end
4325 will crash if presented with a non-numeric designated
4327 if (initializer && TREE_CODE (initializer) == CONSTRUCTOR)
4329 VEC(constructor_elt,gc) *v = CONSTRUCTOR_ELTS (initializer);
4330 constructor_elt *ce;
4333 VEC_iterate (constructor_elt, v, i, ce);
4335 if (!check_array_designated_initializer (ce))
4341 failure = cp_complete_array_type (&TREE_TYPE (decl), initializer,
4345 error ("initializer fails to determine size of %qD", decl);
4346 TREE_TYPE (decl) = error_mark_node;
4348 else if (failure == 2)
4352 error ("array size missing in %qD", decl);
4353 TREE_TYPE (decl) = error_mark_node;
4355 /* If a `static' var's size isn't known, make it extern as
4356 well as static, so it does not get allocated. If it's not
4357 `static', then don't mark it extern; finish_incomplete_decl
4358 will give it a default size and it will get allocated. */
4359 else if (!pedantic && TREE_STATIC (decl) && !TREE_PUBLIC (decl))
4360 DECL_EXTERNAL (decl) = 1;
4362 else if (failure == 3)
4364 error ("zero-size array %qD", decl);
4365 TREE_TYPE (decl) = error_mark_node;
4369 cp_apply_type_quals_to_decl (cp_type_quals (TREE_TYPE (decl)), decl);
4371 layout_decl (decl, 0);
4375 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
4376 any appropriate error messages regarding the layout. */
4379 layout_var_decl (tree decl)
4383 type = TREE_TYPE (decl);
4384 if (type == error_mark_node)
4387 /* If we haven't already layed out this declaration, do so now.
4388 Note that we must not call complete type for an external object
4389 because it's type might involve templates that we are not
4390 supposed to instantiate yet. (And it's perfectly valid to say
4391 `extern X x' for some incomplete type `X'.) */
4392 if (!DECL_EXTERNAL (decl))
4393 complete_type (type);
4394 if (!DECL_SIZE (decl)
4395 && TREE_TYPE (decl) != error_mark_node
4396 && (COMPLETE_TYPE_P (type)
4397 || (TREE_CODE (type) == ARRAY_TYPE
4398 && !TYPE_DOMAIN (type)
4399 && COMPLETE_TYPE_P (TREE_TYPE (type)))))
4400 layout_decl (decl, 0);
4402 if (!DECL_EXTERNAL (decl) && DECL_SIZE (decl) == NULL_TREE)
4404 /* An automatic variable with an incomplete type: that is an error.
4405 Don't talk about array types here, since we took care of that
4406 message in grokdeclarator. */
4407 error ("storage size of %qD isn't known", decl);
4408 TREE_TYPE (decl) = error_mark_node;
4411 /* Keep this code around in case we later want to control debug info
4412 based on whether a type is "used". (jason 1999-11-11) */
4414 else if (!DECL_EXTERNAL (decl) && IS_AGGR_TYPE (ttype))
4415 /* Let debugger know it should output info for this type. */
4416 note_debug_info_needed (ttype);
4418 if (TREE_STATIC (decl) && DECL_CLASS_SCOPE_P (decl))
4419 note_debug_info_needed (DECL_CONTEXT (decl));
4422 if ((DECL_EXTERNAL (decl) || TREE_STATIC (decl))
4423 && DECL_SIZE (decl) != NULL_TREE
4424 && ! TREE_CONSTANT (DECL_SIZE (decl)))
4426 if (TREE_CODE (DECL_SIZE (decl)) == INTEGER_CST)
4427 constant_expression_warning (DECL_SIZE (decl));
4429 error ("storage size of %qD isn't constant", decl);
4433 /* If a local static variable is declared in an inline function, or if
4434 we have a weak definition, we must endeavor to create only one
4435 instance of the variable at link-time. */
4438 maybe_commonize_var (tree decl)
4440 /* Static data in a function with comdat linkage also has comdat
4442 if (TREE_STATIC (decl)
4443 /* Don't mess with __FUNCTION__. */
4444 && ! DECL_ARTIFICIAL (decl)
4445 && DECL_FUNCTION_SCOPE_P (decl)
4446 /* Unfortunately, import_export_decl has not always been called
4447 before the function is processed, so we cannot simply check
4449 && (DECL_COMDAT (DECL_CONTEXT (decl))
4450 || ((DECL_DECLARED_INLINE_P (DECL_CONTEXT (decl))
4451 || DECL_TEMPLATE_INSTANTIATION (DECL_CONTEXT (decl)))
4452 && TREE_PUBLIC (DECL_CONTEXT (decl)))))
4456 /* With weak symbols, we simply make the variable COMDAT;
4457 that will cause copies in multiple translations units to
4459 comdat_linkage (decl);
4463 if (DECL_INITIAL (decl) == NULL_TREE
4464 || DECL_INITIAL (decl) == error_mark_node)
4466 /* Without weak symbols, we can use COMMON to merge
4467 uninitialized variables. */
4468 TREE_PUBLIC (decl) = 1;
4469 DECL_COMMON (decl) = 1;
4473 /* While for initialized variables, we must use internal
4474 linkage -- which means that multiple copies will not
4476 TREE_PUBLIC (decl) = 0;
4477 DECL_COMMON (decl) = 0;
4478 warning (0, "sorry: semantics of inline function static "
4479 "data %q+#D are wrong (you'll wind up "
4480 "with multiple copies)", decl);
4481 warning (0, "%J you can work around this by removing "
4487 else if (DECL_LANG_SPECIFIC (decl) && DECL_COMDAT (decl))
4488 /* Set it up again; we might have set DECL_INITIAL since the last
4490 comdat_linkage (decl);
4493 /* Issue an error message if DECL is an uninitialized const variable. */
4496 check_for_uninitialized_const_var (tree decl)
4498 tree type = TREE_TYPE (decl);
4500 /* ``Unless explicitly declared extern, a const object does not have
4501 external linkage and must be initialized. ($8.4; $12.1)'' ARM
4503 if (TREE_CODE (decl) == VAR_DECL
4504 && TREE_CODE (type) != REFERENCE_TYPE
4505 && CP_TYPE_CONST_P (type)
4506 && !TYPE_NEEDS_CONSTRUCTING (type)
4507 && !DECL_INITIAL (decl))
4508 error ("uninitialized const %qD", decl);
4512 /* Structure holding the current initializer being processed by reshape_init.
4513 CUR is a pointer to the current element being processed, END is a pointer
4514 after the last element present in the initializer. */
4515 typedef struct reshape_iterator_t
4517 constructor_elt *cur;
4518 constructor_elt *end;
4521 static tree reshape_init_r (tree, reshape_iter *, bool);
4523 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
4524 returned is the next FIELD_DECL (possibly FIELD itself) that can be
4525 initialized. If there are no more such fields, the return value
4529 next_initializable_field (tree field)
4532 && (TREE_CODE (field) != FIELD_DECL
4533 || (DECL_C_BIT_FIELD (field) && !DECL_NAME (field))
4534 || DECL_ARTIFICIAL (field)))
4535 field = TREE_CHAIN (field);
4540 /* Subroutine of reshape_init_array and reshape_init_vector, which does
4541 the actual work. ELT_TYPE is the element type of the array. MAX_INDEX is an
4542 INTEGER_CST representing the size of the array minus one (the maximum index),
4543 or NULL_TREE if the array was declared without specifying the size. D is
4544 the iterator within the constructor. */
4547 reshape_init_array_1 (tree elt_type, tree max_index, reshape_iter *d)
4550 bool sized_array_p = (max_index != NULL_TREE);
4551 unsigned HOST_WIDE_INT max_index_cst = 0;
4552 unsigned HOST_WIDE_INT index;
4554 /* The initializer for an array is always a CONSTRUCTOR. */
4555 new_init = build_constructor (NULL_TREE, NULL);
4559 /* Minus 1 is used for zero sized arrays. */
4560 if (integer_all_onesp (max_index))
4563 if (host_integerp (max_index, 1))
4564 max_index_cst = tree_low_cst (max_index, 1);
4565 /* sizetype is sign extended, not zero extended. */
4567 max_index_cst = tree_low_cst (fold_convert (size_type_node, max_index),
4571 /* Loop until there are no more initializers. */
4573 d->cur != d->end && (!sized_array_p || index <= max_index_cst);
4578 check_array_designated_initializer (d->cur);
4579 elt_init = reshape_init_r (elt_type, d, /*first_initializer_p=*/false);
4580 if (elt_init == error_mark_node)
4581 return error_mark_node;
4582 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init), NULL_TREE, elt_init);
4588 /* Subroutine of reshape_init_r, processes the initializers for arrays.
4589 Parameters are the same of reshape_init_r. */
4592 reshape_init_array (tree type, reshape_iter *d)
4594 tree max_index = NULL_TREE;
4596 gcc_assert (TREE_CODE (type) == ARRAY_TYPE);
4598 if (TYPE_DOMAIN (type))
4599 max_index = array_type_nelts (type);
4601 return reshape_init_array_1 (TREE_TYPE (type), max_index, d);
4604 /* Subroutine of reshape_init_r, processes the initializers for vectors.
4605 Parameters are the same of reshape_init_r. */
4608 reshape_init_vector (tree type, reshape_iter *d)
4610 tree max_index = NULL_TREE;
4613 gcc_assert (TREE_CODE (type) == VECTOR_TYPE);
4615 if (COMPOUND_LITERAL_P (d->cur->value))
4617 tree value = d->cur->value;
4618 if (!same_type_p (TREE_TYPE (value), type))
4620 error ("invalid type %qT as initializer for a vector of type %qT",
4621 TREE_TYPE (d->cur->value), type);
4622 value = error_mark_node;
4628 /* For a vector, the representation type is a struct
4629 containing a single member which is an array of the
4630 appropriate size. */
4631 rtype = TYPE_DEBUG_REPRESENTATION_TYPE (type);
4632 if (rtype && TYPE_DOMAIN (TREE_TYPE (TYPE_FIELDS (rtype))))
4633 max_index = array_type_nelts (TREE_TYPE (TYPE_FIELDS (rtype)));
4635 return reshape_init_array_1 (TREE_TYPE (type), max_index, d);
4638 /* Subroutine of reshape_init_r, processes the initializers for classes
4639 or union. Parameters are the same of reshape_init_r. */
4642 reshape_init_class (tree type, reshape_iter *d, bool first_initializer_p)
4647 gcc_assert (CLASS_TYPE_P (type));
4649 /* The initializer for a class is always a CONSTRUCTOR. */
4650 new_init = build_constructor (NULL_TREE, NULL);
4651 field = next_initializable_field (TYPE_FIELDS (type));
4657 An initializer for an aggregate member that is an
4658 empty class shall have the form of an empty
4659 initializer-list {}. */
4660 if (!first_initializer_p)
4662 error ("initializer for %qT must be brace-enclosed", type);
4663 return error_mark_node;
4668 /* Loop through the initializable fields, gathering initializers. */
4669 while (d->cur != d->end)
4673 /* Handle designated initializers, as an extension. */
4676 field = lookup_field_1 (type, d->cur->index, /*want_type=*/false);
4678 if (!field || TREE_CODE (field) != FIELD_DECL)
4680 error ("%qT has no non-static data member named %qD", type,
4682 return error_mark_node;
4686 /* If we processed all the member of the class, we are done. */
4690 field_init = reshape_init_r (TREE_TYPE (field), d,
4691 /*first_initializer_p=*/false);
4692 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init), field, field_init);
4696 When a union is initialized with a brace-enclosed
4697 initializer, the braces shall only contain an
4698 initializer for the first member of the union. */
4699 if (TREE_CODE (type) == UNION_TYPE)
4702 field = next_initializable_field (TREE_CHAIN (field));
4708 /* Subroutine of reshape_init, which processes a single initializer (part of
4709 a CONSTRUCTOR). TYPE is the type of the variable being initialized, D is the
4710 iterator within the CONSTRUCTOR which points to the initializer to process.
4711 FIRST_INITIALIZER_P is true if this is the first initializer of the
4712 CONSTRUCTOR node. */
4715 reshape_init_r (tree type, reshape_iter *d, bool first_initializer_p)
4717 tree init = d->cur->value;
4719 /* A non-aggregate type is always initialized with a single
4721 if (!CP_AGGREGATE_TYPE_P (type))
4723 /* It is invalid to initialize a non-aggregate type with a
4724 brace-enclosed initializer.
4725 We need to check for BRACE_ENCLOSED_INITIALIZER_P here because
4726 of g++.old-deja/g++.mike/p7626.C: a pointer-to-member constant is
4727 a CONSTRUCTOR (with a record type). */
4728 if (TREE_CODE (init) == CONSTRUCTOR
4729 && BRACE_ENCLOSED_INITIALIZER_P (init)) /* p7626.C */
4731 error ("braces around scalar initializer for type %qT", type);
4732 init = error_mark_node;
4741 All implicit type conversions (clause _conv_) are considered when
4742 initializing the aggregate member with an initializer from an
4743 initializer-list. If the initializer can initialize a member,
4744 the member is initialized. Otherwise, if the member is itself a
4745 non-empty subaggregate, brace elision is assumed and the
4746 initializer is considered for the initialization of the first
4747 member of the subaggregate. */
4748 if (TREE_CODE (init) != CONSTRUCTOR
4749 && can_convert_arg (type, TREE_TYPE (init), init, LOOKUP_NORMAL))
4755 /* [dcl.init.string]
4757 A char array (whether plain char, signed char, or unsigned char)
4758 can be initialized by a string-literal (optionally enclosed in
4759 braces); a wchar_t array can be initialized by a wide
4760 string-literal (optionally enclosed in braces). */
4761 if (TREE_CODE (type) == ARRAY_TYPE
4762 && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type))))
4764 tree str_init = init;
4766 /* Strip one level of braces if and only if they enclose a single
4767 element (as allowed by [dcl.init.string]). */
4768 if (!first_initializer_p
4769 && TREE_CODE (str_init) == CONSTRUCTOR
4770 && VEC_length (constructor_elt, CONSTRUCTOR_ELTS (str_init)) == 1)
4772 str_init = VEC_index (constructor_elt,
4773 CONSTRUCTOR_ELTS (str_init), 0)->value;
4776 /* If it's a string literal, then it's the initializer for the array
4777 as a whole. Otherwise, continue with normal initialization for
4778 array types (one value per array element). */
4779 if (TREE_CODE (str_init) == STRING_CST)
4786 /* The following cases are about aggregates. If we are not within a full
4787 initializer already, and there is not a CONSTRUCTOR, it means that there
4788 is a missing set of braces (that is, we are processing the case for
4789 which reshape_init exists). */
4790 if (!first_initializer_p)
4792 if (TREE_CODE (init) == CONSTRUCTOR)
4794 if (TREE_TYPE (init) && TYPE_PTRMEMFUNC_P (TREE_TYPE (init)))
4795 /* There is no need to reshape pointer-to-member function
4796 initializers, as they are always constructed correctly
4797 by the front end. */
4799 else if (COMPOUND_LITERAL_P (init))
4800 /* For a nested compound literal, there is no need to reshape since
4801 brace elision is not allowed. Even if we decided to allow it,
4802 we should add a call to reshape_init in finish_compound_literal,
4803 before calling digest_init, so changing this code would still
4804 not be necessary. */
4805 gcc_assert (!BRACE_ENCLOSED_INITIALIZER_P (init));
4809 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init));
4810 return reshape_init (type, init);
4814 warning (OPT_Wmissing_braces, "missing braces around initializer for %qT",
4818 /* Dispatch to specialized routines. */
4819 if (CLASS_TYPE_P (type))
4820 return reshape_init_class (type, d, first_initializer_p);
4821 else if (TREE_CODE (type) == ARRAY_TYPE)
4822 return reshape_init_array (type, d);
4823 else if (TREE_CODE (type) == VECTOR_TYPE)
4824 return reshape_init_vector (type, d);
4829 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
4830 brace-enclosed aggregate initializer.
4832 INIT is the CONSTRUCTOR containing the list of initializers describing
4833 a brace-enclosed initializer for an entity of the indicated aggregate TYPE.
4834 It may not presently match the shape of the TYPE; for example:
4836 struct S { int a; int b; };
4837 struct S a[] = { 1, 2, 3, 4 };
4839 Here INIT will hold a VEC of four elements, rather than a
4840 VEC of two elements, each itself a VEC of two elements. This
4841 routine transforms INIT from the former form into the latter. The
4842 revised CONSTRUCTOR node is returned. */
4845 reshape_init (tree type, tree init)
4847 VEC(constructor_elt, gc) *v;
4851 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init));
4853 v = CONSTRUCTOR_ELTS (init);
4855 /* An empty constructor does not need reshaping, and it is always a valid
4857 if (VEC_empty (constructor_elt, v))
4860 /* Recurse on this CONSTRUCTOR. */
4861 d.cur = VEC_index (constructor_elt, v, 0);
4862 d.end = d.cur + VEC_length (constructor_elt, v);
4864 new_init = reshape_init_r (type, &d, true);
4865 if (new_init == error_mark_node)
4866 return error_mark_node;
4868 /* Make sure all the element of the constructor were used. Otherwise,
4869 issue an error about exceeding initializers. */
4871 error ("too many initializers for %qT", type);
4876 /* Verify INIT (the initializer for DECL), and record the
4877 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
4878 grok_reference_init.
4880 If the return value is non-NULL, it is an expression that must be
4881 evaluated dynamically to initialize DECL. */
4884 check_initializer (tree decl, tree init, int flags, tree *cleanup)
4886 tree type = TREE_TYPE (decl);
4887 tree init_code = NULL;
4889 /* Things that are going to be initialized need to have complete
4891 TREE_TYPE (decl) = type = complete_type (TREE_TYPE (decl));
4893 if (type == error_mark_node)
4894 /* We will have already complained. */
4897 if (TREE_CODE (type) == ARRAY_TYPE)
4899 tree element_type = TREE_TYPE (type);
4901 /* The array type itself need not be complete, because the
4902 initializer may tell us how many elements are in the array.
4903 But, the elements of the array must be complete. */
4904 if (!COMPLETE_TYPE_P (complete_type (element_type)))
4906 error ("elements of array %q#D have incomplete type", decl);
4909 /* It is not valid to initialize a VLA. */
4911 && ((COMPLETE_TYPE_P (type) && !TREE_CONSTANT (TYPE_SIZE (type)))
4912 || !TREE_CONSTANT (TYPE_SIZE (element_type))))
4914 error ("variable-sized object %qD may not be initialized", decl);
4918 else if (!COMPLETE_TYPE_P (type))
4920 error ("%qD has incomplete type", decl);
4921 TREE_TYPE (decl) = error_mark_node;
4925 /* There is no way to make a variable-sized class type in GNU C++. */
4926 gcc_assert (TREE_CONSTANT (TYPE_SIZE (type)));
4928 if (init && BRACE_ENCLOSED_INITIALIZER_P (init))
4930 int init_len = VEC_length (constructor_elt, CONSTRUCTOR_ELTS (init));
4931 if (SCALAR_TYPE_P (type))
4935 error ("scalar object %qD requires one element in initializer",
4937 TREE_TYPE (decl) = error_mark_node;
4941 else if ((cxx_dialect == cxx98) && !CP_AGGREGATE_TYPE_P (type))
4943 /* A non-aggregate that is not a scalar cannot be initialized
4944 via an initializer-list in C++98. */
4945 error ("braces around initializer for non-aggregate type %qT",
4947 TREE_TYPE (decl) = error_mark_node;
4952 if (TREE_CODE (decl) == CONST_DECL)
4954 gcc_assert (TREE_CODE (type) != REFERENCE_TYPE);
4956 DECL_INITIAL (decl) = init;
4958 gcc_assert (init != NULL_TREE);
4961 else if (!DECL_EXTERNAL (decl) && TREE_CODE (type) == REFERENCE_TYPE)
4962 init = grok_reference_init (decl, type, init, cleanup);
4965 /* Do not reshape constructors of vectors (they don't need to be
4967 if (TREE_CODE (init) == CONSTRUCTOR
4968 && !COMPOUND_LITERAL_P (init)
4969 && !TREE_TYPE (init)) /* ptrmemfunc */
4971 init = reshape_init (type, init);
4973 if ((*targetm.vector_opaque_p) (type))
4975 error ("opaque vector types cannot be initialized");
4976 init = error_mark_node;
4980 /* If DECL has an array type without a specific bound, deduce the
4981 array size from the initializer. */
4982 maybe_deduce_size_from_array_init (decl, init);
4983 type = TREE_TYPE (decl);
4984 if (type == error_mark_node)
4987 if (TYPE_HAS_CONSTRUCTOR (type) || TYPE_NEEDS_CONSTRUCTING (type))
4989 if (TREE_CODE (type) == ARRAY_TYPE)
4990 goto initialize_aggr;
4991 else if (TREE_CODE (init) == CONSTRUCTOR)
4993 if (TYPE_NON_AGGREGATE_CLASS (type))
4995 error ("%qD must be initialized by constructor, "
4998 init = error_mark_node;
5001 goto dont_use_constructor;
5005 int saved_stmts_are_full_exprs_p;
5008 saved_stmts_are_full_exprs_p = 0;
5009 if (building_stmt_tree ())
5011 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
5012 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
5014 init = build_aggr_init (decl, init, flags);
5015 if (building_stmt_tree ())
5016 current_stmt_tree ()->stmts_are_full_exprs_p =
5017 saved_stmts_are_full_exprs_p;
5023 dont_use_constructor:
5024 if (TREE_CODE (init) != TREE_VEC)
5026 init_code = store_init_value (decl, init);
5027 if (pedantic && TREE_CODE (type) == ARRAY_TYPE
5028 && DECL_INITIAL (decl)
5029 && TREE_CODE (DECL_INITIAL (decl)) == STRING_CST
5030 && PAREN_STRING_LITERAL_P (DECL_INITIAL (decl)))
5031 warning (0, "array %qD initialized by parenthesized string literal %qE",
5032 decl, DECL_INITIAL (decl));
5037 else if (DECL_EXTERNAL (decl))
5039 else if (TYPE_P (type) && TYPE_NEEDS_CONSTRUCTING (type))
5040 goto initialize_aggr;
5041 else if (IS_AGGR_TYPE (type))
5043 tree core_type = strip_array_types (type);
5045 if (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type))
5046 error ("structure %qD with uninitialized const members", decl);
5047 if (CLASSTYPE_REF_FIELDS_NEED_INIT (core_type))
5048 error ("structure %qD with uninitialized reference members", decl);
5050 check_for_uninitialized_const_var (decl);
5053 check_for_uninitialized_const_var (decl);
5055 if (init && init != error_mark_node)
5056 init_code = build2 (INIT_EXPR, type, decl, init);
5061 /* If DECL is not a local variable, give it RTL. */
5064 make_rtl_for_nonlocal_decl (tree decl, tree init, const char* asmspec)
5066 int toplev = toplevel_bindings_p ();
5068 const char *filename;
5070 /* Set the DECL_ASSEMBLER_NAME for the object. */
5073 /* The `register' keyword, when used together with an
5074 asm-specification, indicates that the variable should be
5075 placed in a particular register. */
5076 if (TREE_CODE (decl) == VAR_DECL && DECL_REGISTER (decl))
5078 set_user_assembler_name (decl, asmspec);
5079 DECL_HARD_REGISTER (decl) = 1;
5083 if (TREE_CODE (decl) == FUNCTION_DECL
5084 && DECL_BUILT_IN_CLASS (decl) == BUILT_IN_NORMAL)
5085 set_builtin_user_assembler_name (decl, asmspec);
5086 set_user_assembler_name (decl, asmspec);
5090 /* Handle non-variables up front. */
5091 if (TREE_CODE (decl) != VAR_DECL)
5093 rest_of_decl_compilation (decl, toplev, at_eof);
5097 /* If we see a class member here, it should be a static data
5099 if (DECL_LANG_SPECIFIC (decl) && DECL_IN_AGGR_P (decl))
5101 gcc_assert (TREE_STATIC (decl));
5102 /* An in-class declaration of a static data member should be
5103 external; it is only a declaration, and not a definition. */
5104 if (init == NULL_TREE)
5105 gcc_assert (DECL_EXTERNAL (decl) || !TREE_PUBLIC (decl));
5108 /* We don't create any RTL for local variables. */
5109 if (DECL_FUNCTION_SCOPE_P (decl) && !TREE_STATIC (decl))
5112 /* We defer emission of local statics until the corresponding
5113 DECL_EXPR is expanded. */
5114 defer_p = DECL_FUNCTION_SCOPE_P (decl) || DECL_VIRTUAL_P (decl);
5116 /* We try to defer namespace-scope static constants so that they are
5117 not emitted into the object file unnecessarily. */
5118 filename = input_filename;
5119 if (!DECL_VIRTUAL_P (decl)
5120 && TREE_READONLY (decl)
5121 && DECL_INITIAL (decl) != NULL_TREE
5122 && DECL_INITIAL (decl) != error_mark_node
5124 && ! EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl))
5126 && !TREE_PUBLIC (decl))
5128 /* Fool with the linkage of static consts according to #pragma
5130 struct c_fileinfo *finfo = get_fileinfo (filename);
5131 if (!finfo->interface_unknown && !TREE_PUBLIC (decl))
5133 TREE_PUBLIC (decl) = 1;
5134 DECL_EXTERNAL (decl) = finfo->interface_only;
5139 /* Likewise for template instantiations. */
5140 else if (DECL_LANG_SPECIFIC (decl)
5141 && DECL_IMPLICIT_INSTANTIATION (decl))
5144 /* If we're not deferring, go ahead and assemble the variable. */
5146 rest_of_decl_compilation (decl, toplev, at_eof);
5149 /* walk_tree helper for wrap_temporary_cleanups, below. */
5152 wrap_cleanups_r (tree *stmt_p, int *walk_subtrees, void *data)
5154 if (TYPE_P (*stmt_p))
5160 if (TREE_CODE (*stmt_p) == TARGET_EXPR)
5162 tree guard = (tree)data;
5163 tree tcleanup = TARGET_EXPR_CLEANUP (*stmt_p);
5165 tcleanup = build2 (TRY_CATCH_EXPR, void_type_node, tcleanup, guard);
5167 TARGET_EXPR_CLEANUP (*stmt_p) = tcleanup;
5173 /* We're initializing a local variable which has a cleanup GUARD. If there
5174 are any temporaries used in the initializer INIT of this variable, we
5175 need to wrap their cleanups with TRY_CATCH_EXPR (, GUARD) so that the
5176 variable will be cleaned up properly if one of them throws. */
5179 wrap_temporary_cleanups (tree init, tree guard)
5181 cp_walk_tree_without_duplicates (&init, wrap_cleanups_r, (void *)guard);
5184 /* Generate code to initialize DECL (a local variable). */
5187 initialize_local_var (tree decl, tree init)
5189 tree type = TREE_TYPE (decl);
5193 gcc_assert (TREE_CODE (decl) == VAR_DECL
5194 || TREE_CODE (decl) == RESULT_DECL);
5195 gcc_assert (!TREE_STATIC (decl));
5197 if (DECL_SIZE (decl) == NULL_TREE)
5199 /* If we used it already as memory, it must stay in memory. */
5200 DECL_INITIAL (decl) = NULL_TREE;
5201 TREE_ADDRESSABLE (decl) = TREE_USED (decl);
5205 if (type == error_mark_node)
5208 /* Compute and store the initial value. */
5209 already_used = TREE_USED (decl) || TREE_USED (type);
5211 /* Generate a cleanup, if necessary. */
5212 cleanup = cxx_maybe_build_cleanup (decl);
5214 /* Perform the initialization. */
5217 int saved_stmts_are_full_exprs_p;
5219 /* If we're only initializing a single object, guard the destructors
5220 of any temporaries used in its initializer with its destructor.
5221 This isn't right for arrays because each element initialization is
5222 a full-expression. */
5223 if (cleanup && TREE_CODE (type) != ARRAY_TYPE)
5224 wrap_temporary_cleanups (init, cleanup);
5226 gcc_assert (building_stmt_tree ());
5227 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
5228 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
5229 finish_expr_stmt (init);
5230 current_stmt_tree ()->stmts_are_full_exprs_p =
5231 saved_stmts_are_full_exprs_p;
5234 /* Set this to 0 so we can tell whether an aggregate which was
5235 initialized was ever used. Don't do this if it has a
5236 destructor, so we don't complain about the 'resource
5237 allocation is initialization' idiom. Now set
5238 attribute((unused)) on types so decls of that type will be
5239 marked used. (see TREE_USED, above.) */
5240 if (TYPE_NEEDS_CONSTRUCTING (type)
5242 && TYPE_HAS_TRIVIAL_DESTRUCTOR (type)
5243 && DECL_NAME (decl))
5244 TREE_USED (decl) = 0;
5245 else if (already_used)
5246 TREE_USED (decl) = 1;
5249 finish_decl_cleanup (decl, cleanup);
5252 /* DECL is a VAR_DECL for a compiler-generated variable with static
5253 storage duration (like a virtual table) whose initializer is a
5254 compile-time constant. INIT must be either a TREE_LIST of values,
5255 or a CONSTRUCTOR. Initialize the variable and provide it to the
5259 initialize_artificial_var (tree decl, tree init)
5261 gcc_assert (DECL_ARTIFICIAL (decl));
5262 if (TREE_CODE (init) == TREE_LIST)
5263 init = build_constructor_from_list (NULL_TREE, init);
5264 gcc_assert (TREE_CODE (init) == CONSTRUCTOR);
5265 DECL_INITIAL (decl) = init;
5266 DECL_INITIALIZED_P (decl) = 1;
5267 determine_visibility (decl);
5268 layout_var_decl (decl);
5269 maybe_commonize_var (decl);
5270 make_rtl_for_nonlocal_decl (decl, init, /*asmspec=*/NULL);
5273 /* INIT is the initializer for a variable, as represented by the
5274 parser. Returns true iff INIT is value-dependent. */
5277 value_dependent_init_p (tree init)
5279 if (TREE_CODE (init) == TREE_LIST)
5280 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
5281 return any_value_dependent_elements_p (init);
5282 else if (TREE_CODE (init) == CONSTRUCTOR)
5283 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
5285 VEC(constructor_elt, gc) *elts;
5289 elts = CONSTRUCTOR_ELTS (init);
5290 nelts = VEC_length (constructor_elt, elts);
5291 for (i = 0; i < nelts; ++i)
5292 if (value_dependent_init_p (VEC_index (constructor_elt,
5297 /* It must be a simple expression, e.g., int i = 3; */
5298 return value_dependent_expression_p (init);
5303 /* Finish processing of a declaration;
5304 install its line number and initial value.
5305 If the length of an array type is not known before,
5306 it must be determined now, from the initial value, or it is an error.
5308 INIT is the initializer (if any) for DECL. If INIT_CONST_EXPR_P is
5309 true, then INIT is an integral constant expression.
5311 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
5312 if the (init) syntax was used. */
5315 cp_finish_decl (tree decl, tree init, bool init_const_expr_p,
5316 tree asmspec_tree, int flags)
5320 const char *asmspec = NULL;
5321 int was_readonly = 0;
5322 bool var_definition_p = false;
5323 int saved_processing_template_decl;
5325 if (decl == error_mark_node)
5330 error ("assignment (not initialization) in declaration");
5334 gcc_assert (TREE_CODE (decl) != RESULT_DECL);
5335 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
5336 gcc_assert (TREE_CODE (decl) != PARM_DECL);
5338 type = TREE_TYPE (decl);
5339 if (type == error_mark_node)
5342 /* Assume no cleanup is required. */
5343 cleanup = NULL_TREE;
5344 saved_processing_template_decl = processing_template_decl;
5346 /* If a name was specified, get the string. */
5347 if (global_scope_p (current_binding_level))
5348 asmspec_tree = maybe_apply_renaming_pragma (decl, asmspec_tree);
5349 if (asmspec_tree && asmspec_tree != error_mark_node)
5350 asmspec = TREE_STRING_POINTER (asmspec_tree);
5352 if (current_class_type
5353 && CP_DECL_CONTEXT (decl) == current_class_type
5354 && TYPE_BEING_DEFINED (current_class_type)
5355 && (DECL_INITIAL (decl) || init))
5356 DECL_INITIALIZED_IN_CLASS_P (decl) = 1;
5358 if (processing_template_decl)
5360 bool type_dependent_p;
5362 /* Add this declaration to the statement-tree. */
5363 if (at_function_scope_p ())
5364 add_decl_expr (decl);
5366 type_dependent_p = dependent_type_p (type);
5368 if (init && init_const_expr_p)
5370 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl) = 1;
5371 if (DECL_INTEGRAL_CONSTANT_VAR_P (decl))
5372 TREE_CONSTANT (decl) = 1;
5375 /* Generally, initializers in templates are expanded when the
5376 template is instantiated. But, if DECL is an integral
5377 constant static data member, then it can be used in future
5378 integral constant expressions, and its value must be
5381 && DECL_CLASS_SCOPE_P (decl)
5382 && DECL_INTEGRAL_CONSTANT_VAR_P (decl)
5383 && !type_dependent_p
5384 && !value_dependent_init_p (init)))
5387 DECL_INITIAL (decl) = init;
5388 if (TREE_CODE (decl) == VAR_DECL
5389 && !DECL_PRETTY_FUNCTION_P (decl)
5390 && !type_dependent_p)
5391 maybe_deduce_size_from_array_init (decl, init);
5395 if (TREE_CODE (init) == TREE_LIST)
5397 /* If the parenthesized-initializer form was used (e.g.,
5398 "int A<N>::i(X)"), then INIT will be a TREE_LIST of initializer
5399 arguments. (There is generally only one.) We convert them
5402 for (; list; list = TREE_CHAIN (list))
5404 tree elt = TREE_VALUE (list);
5405 TREE_VALUE (list) = fold_non_dependent_expr (elt);
5409 init = fold_non_dependent_expr (init);
5410 processing_template_decl = 0;
5413 /* Take care of TYPE_DECLs up front. */
5414 if (TREE_CODE (decl) == TYPE_DECL)
5416 if (type != error_mark_node
5417 && IS_AGGR_TYPE (type) && DECL_NAME (decl))
5419 if (TREE_TYPE (DECL_NAME (decl)) && TREE_TYPE (decl) != type)
5420 warning (0, "shadowing previous type declaration of %q#D", decl);
5421 set_identifier_type_value (DECL_NAME (decl), decl);
5424 /* If we have installed this as the canonical typedef for this
5425 type, and that type has not been defined yet, delay emitting
5426 the debug information for it, as we will emit it later. */
5427 if (TYPE_MAIN_DECL (TREE_TYPE (decl)) == decl
5428 && !COMPLETE_TYPE_P (TREE_TYPE (decl)))
5429 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
5431 rest_of_decl_compilation (decl, DECL_CONTEXT (decl) == NULL_TREE,
5436 /* A reference will be modified here, as it is initialized. */
5437 if (! DECL_EXTERNAL (decl)
5438 && TREE_READONLY (decl)
5439 && TREE_CODE (type) == REFERENCE_TYPE)
5442 TREE_READONLY (decl) = 0;
5445 if (TREE_CODE (decl) == VAR_DECL)
5447 /* Only PODs can have thread-local storage. Other types may require
5448 various kinds of non-trivial initialization. */
5449 if (DECL_THREAD_LOCAL_P (decl) && !pod_type_p (TREE_TYPE (decl)))
5450 error ("%qD cannot be thread-local because it has non-POD type %qT",
5451 decl, TREE_TYPE (decl));
5452 /* If this is a local variable that will need a mangled name,
5453 register it now. We must do this before processing the
5454 initializer for the variable, since the initialization might
5455 require a guard variable, and since the mangled name of the
5456 guard variable will depend on the mangled name of this
5458 if (DECL_FUNCTION_SCOPE_P (decl)
5459 && TREE_STATIC (decl)
5460 && !DECL_ARTIFICIAL (decl))
5461 push_local_name (decl);
5462 /* Convert the initializer to the type of DECL, if we have not
5463 already initialized DECL. */
5464 if (!DECL_INITIALIZED_P (decl)
5465 /* If !DECL_EXTERNAL then DECL is being defined. In the
5466 case of a static data member initialized inside the
5467 class-specifier, there can be an initializer even if DECL
5468 is *not* defined. */
5469 && (!DECL_EXTERNAL (decl) || init))
5471 if (TYPE_FOR_JAVA (type) && IS_AGGR_TYPE (type))
5474 = IDENTIFIER_GLOBAL_VALUE (get_identifier ("jclass"));
5475 /* Allow libjava/prims.cc define primitive classes. */
5476 if (init != NULL_TREE
5477 || jclass == NULL_TREE
5478 || TREE_CODE (jclass) != TYPE_DECL
5479 || !POINTER_TYPE_P (TREE_TYPE (jclass))
5480 || !same_type_ignoring_top_level_qualifiers_p
5481 (type, TREE_TYPE (TREE_TYPE (jclass))))
5482 error ("Java object %qD not allocated with %<new%>", decl);
5487 DECL_NONTRIVIALLY_INITIALIZED_P (decl) = 1;
5488 if (init_const_expr_p)
5490 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl) = 1;
5491 if (DECL_INTEGRAL_CONSTANT_VAR_P (decl))
5492 TREE_CONSTANT (decl) = 1;
5495 init = check_initializer (decl, init, flags, &cleanup);
5496 /* Thread-local storage cannot be dynamically initialized. */
5497 if (DECL_THREAD_LOCAL_P (decl) && init)
5499 error ("%qD is thread-local and so cannot be dynamically "
5500 "initialized", decl);
5504 /* Check that the initializer for a static data member was a
5505 constant. Although we check in the parser that the
5506 initializer is an integral constant expression, we do not
5507 simplify division-by-zero at the point at which it
5508 occurs. Therefore, in:
5510 struct S { static const int i = 7 / 0; };
5512 we issue an error at this point. It would
5513 probably be better to forbid division by zero in
5514 integral constant expressions. */
5515 if (DECL_EXTERNAL (decl) && init)
5517 error ("%qD cannot be initialized by a non-constant expression"
5518 " when being declared", decl);
5519 DECL_INITIALIZED_IN_CLASS_P (decl) = 0;
5527 The memory occupied by any object of static storage
5528 duration is zero-initialized at program startup before
5529 any other initialization takes place.
5531 We cannot create an appropriate initializer until after
5532 the type of DECL is finalized. If DECL_INITIAL is set,
5533 then the DECL is statically initialized, and any
5534 necessary zero-initialization has already been performed. */
5535 if (TREE_STATIC (decl) && !DECL_INITIAL (decl))
5536 DECL_INITIAL (decl) = build_zero_init (TREE_TYPE (decl),
5537 /*nelts=*/NULL_TREE,
5538 /*static_storage_p=*/true);
5539 /* Remember that the initialization for this variable has
5541 DECL_INITIALIZED_P (decl) = 1;
5542 /* This declaration is the definition of this variable,
5543 unless we are initializing a static data member within
5544 the class specifier. */
5545 if (!DECL_EXTERNAL (decl))
5546 var_definition_p = true;
5548 /* If the variable has an array type, lay out the type, even if
5549 there is no initializer. It is valid to index through the
5550 array, and we must get TYPE_ALIGN set correctly on the array
5552 else if (TREE_CODE (type) == ARRAY_TYPE)
5555 else if (TREE_CODE (decl) == FIELD_DECL
5556 && TYPE_FOR_JAVA (type) && IS_AGGR_TYPE (type))
5557 error ("non-static data member %qD has Java class type", decl);
5559 /* Add this declaration to the statement-tree. This needs to happen
5560 after the call to check_initializer so that the DECL_EXPR for a
5561 reference temp is added before the DECL_EXPR for the reference itself. */
5562 if (at_function_scope_p ())
5563 add_decl_expr (decl);
5565 /* Let the middle end know about variables and functions -- but not
5566 static data members in uninstantiated class templates. */
5567 if (!saved_processing_template_decl
5568 && (TREE_CODE (decl) == VAR_DECL
5569 || TREE_CODE (decl) == FUNCTION_DECL))
5571 if (TREE_CODE (decl) == VAR_DECL)
5573 layout_var_decl (decl);
5574 maybe_commonize_var (decl);
5577 /* This needs to happen after the linkage is set. */
5578 determine_visibility (decl);
5580 if (var_definition_p && TREE_STATIC (decl))
5582 /* If a TREE_READONLY variable needs initialization
5583 at runtime, it is no longer readonly and we need to
5584 avoid MEM_READONLY_P being set on RTL created for it. */
5587 if (TREE_READONLY (decl))
5588 TREE_READONLY (decl) = 0;
5591 else if (was_readonly)
5592 TREE_READONLY (decl) = 1;
5595 make_rtl_for_nonlocal_decl (decl, init, asmspec);
5597 /* Check for abstractness of the type. Notice that there is no
5598 need to strip array types here since the check for those types
5599 is already done within create_array_type_for_decl. */
5600 if (TREE_CODE (type) == FUNCTION_TYPE
5601 || TREE_CODE (type) == METHOD_TYPE)
5602 abstract_virtuals_error (decl, TREE_TYPE (type));
5604 abstract_virtuals_error (decl, type);
5606 if (TREE_CODE (decl) == FUNCTION_DECL
5607 || TREE_TYPE (decl) == error_mark_node)
5608 /* No initialization required. */
5610 else if (DECL_EXTERNAL (decl)
5611 && ! (DECL_LANG_SPECIFIC (decl)
5612 && DECL_NOT_REALLY_EXTERN (decl)))
5615 DECL_INITIAL (decl) = init;
5617 /* A variable definition. */
5618 else if (DECL_FUNCTION_SCOPE_P (decl) && !TREE_STATIC (decl))
5619 /* Initialize the local variable. */
5620 initialize_local_var (decl, init);
5622 /* If a variable is defined, and then a subsequent
5623 definition with external linkage is encountered, we will
5624 get here twice for the same variable. We want to avoid
5625 calling expand_static_init more than once. For variables
5626 that are not static data members, we can call
5627 expand_static_init only when we actually process the
5628 initializer. It is not legal to redeclare a static data
5629 member, so this issue does not arise in that case. */
5630 else if (var_definition_p && TREE_STATIC (decl))
5631 expand_static_init (decl, init);
5634 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
5635 reference, insert it in the statement-tree now. */
5637 push_cleanup (decl, cleanup, false);
5640 processing_template_decl = saved_processing_template_decl;
5643 TREE_READONLY (decl) = 1;
5645 /* If this was marked 'used', be sure it will be output. */
5646 if (lookup_attribute ("used", DECL_ATTRIBUTES (decl)))
5647 mark_decl_referenced (decl);
5650 /* This is here for a midend callback from c-common.c. */
5653 finish_decl (tree decl, tree init, tree asmspec_tree)
5655 cp_finish_decl (decl, init, /*init_const_expr_p=*/false, asmspec_tree, 0);
5658 /* Returns a declaration for a VAR_DECL as if:
5660 extern "C" TYPE NAME;
5662 had been seen. Used to create compiler-generated global
5666 declare_global_var (tree name, tree type)
5670 push_to_top_level ();
5671 decl = build_decl (VAR_DECL, name, type);
5672 TREE_PUBLIC (decl) = 1;
5673 DECL_EXTERNAL (decl) = 1;
5674 DECL_ARTIFICIAL (decl) = 1;
5675 /* If the user has explicitly declared this variable (perhaps
5676 because the code we are compiling is part of a low-level runtime
5677 library), then it is possible that our declaration will be merged
5678 with theirs by pushdecl. */
5679 decl = pushdecl (decl);
5680 finish_decl (decl, NULL_TREE, NULL_TREE);
5681 pop_from_top_level ();
5686 /* Returns the type for the argument to "__cxa_atexit" (or "atexit",
5687 if "__cxa_atexit" is not being used) corresponding to the function
5688 to be called when the program exits. */
5691 get_atexit_fn_ptr_type (void)
5696 if (!atexit_fn_ptr_type_node)
5698 if (flag_use_cxa_atexit
5699 && !targetm.cxx.use_atexit_for_cxa_atexit ())
5700 /* The parameter to "__cxa_atexit" is "void (*)(void *)". */
5701 arg_types = tree_cons (NULL_TREE, ptr_type_node, void_list_node);
5703 /* The parameter to "atexit" is "void (*)(void)". */
5704 arg_types = void_list_node;
5706 fn_type = build_function_type (void_type_node, arg_types);
5707 atexit_fn_ptr_type_node = build_pointer_type (fn_type);
5710 return atexit_fn_ptr_type_node;
5713 /* Returns a pointer to the `atexit' function. Note that if
5714 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
5715 `__cxa_atexit' function specified in the IA64 C++ ABI. */
5718 get_atexit_node (void)
5725 bool use_aeabi_atexit;
5730 if (flag_use_cxa_atexit && !targetm.cxx.use_atexit_for_cxa_atexit ())
5732 /* The declaration for `__cxa_atexit' is:
5734 int __cxa_atexit (void (*)(void *), void *, void *)
5736 We build up the argument types and then then function type
5739 use_aeabi_atexit = targetm.cxx.use_aeabi_atexit ();
5740 /* First, build the pointer-to-function type for the first
5742 fn_ptr_type = get_atexit_fn_ptr_type ();
5743 /* Then, build the rest of the argument types. */
5744 arg_types = tree_cons (NULL_TREE, ptr_type_node, void_list_node);
5745 if (use_aeabi_atexit)
5747 arg_types = tree_cons (NULL_TREE, fn_ptr_type, arg_types);
5748 arg_types = tree_cons (NULL_TREE, ptr_type_node, arg_types);
5752 arg_types = tree_cons (NULL_TREE, ptr_type_node, arg_types);
5753 arg_types = tree_cons (NULL_TREE, fn_ptr_type, arg_types);
5755 /* And the final __cxa_atexit type. */
5756 fn_type = build_function_type (integer_type_node, arg_types);
5757 fn_ptr_type = build_pointer_type (fn_type);
5758 if (use_aeabi_atexit)
5759 name = "__aeabi_atexit";
5761 name = "__cxa_atexit";
5765 /* The declaration for `atexit' is:
5767 int atexit (void (*)());
5769 We build up the argument types and then then function type
5771 fn_ptr_type = get_atexit_fn_ptr_type ();
5772 arg_types = tree_cons (NULL_TREE, fn_ptr_type, void_list_node);
5773 /* Build the final atexit type. */
5774 fn_type = build_function_type (integer_type_node, arg_types);
5778 /* Now, build the function declaration. */
5779 push_lang_context (lang_name_c);
5780 atexit_fndecl = build_library_fn_ptr (name, fn_type);
5781 mark_used (atexit_fndecl);
5782 pop_lang_context ();
5783 atexit_node = decay_conversion (atexit_fndecl);
5788 /* Returns the __dso_handle VAR_DECL. */
5791 get_dso_handle_node (void)
5793 if (dso_handle_node)
5794 return dso_handle_node;
5796 /* Declare the variable. */
5797 dso_handle_node = declare_global_var (get_identifier ("__dso_handle"),
5800 return dso_handle_node;
5803 /* Begin a new function with internal linkage whose job will be simply
5804 to destroy some particular variable. */
5806 static GTY(()) int start_cleanup_cnt;
5809 start_cleanup_fn (void)
5814 bool use_cxa_atexit = flag_use_cxa_atexit
5815 && !targetm.cxx.use_atexit_for_cxa_atexit ();
5817 push_to_top_level ();
5819 /* No need to mangle this. */
5820 push_lang_context (lang_name_c);
5822 /* Build the name of the function. */
5823 sprintf (name, "__tcf_%d", start_cleanup_cnt++);
5824 /* Build the function declaration. */
5825 fntype = TREE_TYPE (get_atexit_fn_ptr_type ());
5826 fndecl = build_lang_decl (FUNCTION_DECL, get_identifier (name), fntype);
5827 /* It's a function with internal linkage, generated by the
5829 TREE_PUBLIC (fndecl) = 0;
5830 DECL_ARTIFICIAL (fndecl) = 1;
5831 /* Make the function `inline' so that it is only emitted if it is
5832 actually needed. It is unlikely that it will be inlined, since
5833 it is only called via a function pointer, but we avoid unnecessary
5834 emissions this way. */
5835 DECL_INLINE (fndecl) = 1;
5836 DECL_DECLARED_INLINE_P (fndecl) = 1;
5837 DECL_INTERFACE_KNOWN (fndecl) = 1;
5838 /* Build the parameter. */
5843 parmdecl = cp_build_parm_decl (NULL_TREE, ptr_type_node);
5844 DECL_CONTEXT (parmdecl) = fndecl;
5845 TREE_USED (parmdecl) = 1;
5846 DECL_ARGUMENTS (fndecl) = parmdecl;
5850 start_preparsed_function (fndecl, NULL_TREE, SF_PRE_PARSED);
5852 pop_lang_context ();
5854 return current_function_decl;
5857 /* Finish the cleanup function begun by start_cleanup_fn. */
5860 end_cleanup_fn (void)
5862 expand_or_defer_fn (finish_function (0));
5864 pop_from_top_level ();
5867 /* Generate code to handle the destruction of DECL, an object with
5868 static storage duration. */
5871 register_dtor_fn (tree decl)
5880 type = TREE_TYPE (decl);
5881 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (type))
5882 return void_zero_node;
5884 /* If we're using "__cxa_atexit" (or "__aeabi_atexit"), and DECL is
5885 a class object, we can just pass the destructor to
5886 "__cxa_atexit"; we don't have to build a temporary function to do
5888 use_dtor = (flag_use_cxa_atexit
5889 && !targetm.cxx.use_atexit_for_cxa_atexit ()
5890 && CLASS_TYPE_P (type));
5895 /* Find the destructor. */
5896 idx = lookup_fnfields_1 (type, complete_dtor_identifier);
5897 gcc_assert (idx >= 0);
5898 cleanup = VEC_index (tree, CLASSTYPE_METHOD_VEC (type), idx);
5899 /* Make sure it is accessible. */
5900 perform_or_defer_access_check (TYPE_BINFO (type), cleanup, cleanup);
5904 /* Call build_cleanup before we enter the anonymous function so
5905 that any access checks will be done relative to the current
5906 scope, rather than the scope of the anonymous function. */
5907 build_cleanup (decl);
5909 /* Now start the function. */
5910 cleanup = start_cleanup_fn ();
5912 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
5913 to the original function, rather than the anonymous one. That
5914 will make the back end think that nested functions are in use,
5915 which causes confusion. */
5916 push_deferring_access_checks (dk_no_check);
5917 fcall = build_cleanup (decl);
5918 pop_deferring_access_checks ();
5920 /* Create the body of the anonymous function. */
5921 compound_stmt = begin_compound_stmt (BCS_FN_BODY);
5922 finish_expr_stmt (fcall);
5923 finish_compound_stmt (compound_stmt);
5927 /* Call atexit with the cleanup function. */
5928 mark_used (cleanup);
5929 cleanup = build_address (cleanup);
5930 if (flag_use_cxa_atexit && !targetm.cxx.use_atexit_for_cxa_atexit ())
5936 /* We must convert CLEANUP to the type that "__cxa_atexit"
5938 cleanup = build_nop (get_atexit_fn_ptr_type (), cleanup);
5939 /* "__cxa_atexit" will pass the address of DECL to the
5940 cleanup function. */
5942 addr = build_address (decl);
5943 /* The declared type of the parameter to "__cxa_atexit" is
5944 "void *". For plain "T*", we could just let the
5945 machinery in build_function_call convert it -- but if the
5946 type is "cv-qualified T *", then we need to convert it
5947 before passing it in, to avoid spurious errors. */
5948 addr = build_nop (ptr_type_node, addr);
5951 /* Since the cleanup functions we build ignore the address
5952 they're given, there's no reason to pass the actual address
5953 in, and, in general, it's cheaper to pass NULL than any
5955 addr = null_pointer_node;
5956 args = tree_cons (NULL_TREE,
5957 build_unary_op (ADDR_EXPR, get_dso_handle_node (), 0),
5959 if (targetm.cxx.use_aeabi_atexit ())
5961 args = tree_cons (NULL_TREE, cleanup, args);
5962 args = tree_cons (NULL_TREE, addr, args);
5966 args = tree_cons (NULL_TREE, addr, args);
5967 args = tree_cons (NULL_TREE, cleanup, args);
5971 args = tree_cons (NULL_TREE, cleanup, NULL_TREE);
5972 return build_function_call (get_atexit_node (), args);
5975 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
5976 is its initializer. Generate code to handle the construction
5977 and destruction of DECL. */
5980 expand_static_init (tree decl, tree init)
5982 gcc_assert (TREE_CODE (decl) == VAR_DECL);
5983 gcc_assert (TREE_STATIC (decl));
5985 /* Some variables require no initialization. */
5987 && !TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl))
5988 && TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
5991 if (DECL_FUNCTION_SCOPE_P (decl))
5993 /* Emit code to perform this initialization but once. */
5994 tree if_stmt = NULL_TREE, inner_if_stmt = NULL_TREE;
5995 tree then_clause = NULL_TREE, inner_then_clause = NULL_TREE;
5996 tree guard, guard_addr;
5997 tree acquire_fn, release_fn, abort_fn;
6000 /* Emit code to perform this initialization but once. This code
6003 static <type> guard;
6004 if (!guard.first_byte) {
6005 if (__cxa_guard_acquire (&guard)) {
6008 // Do initialization.
6009 flag = true; __cxa_guard_release (&guard);
6010 // Register variable for destruction at end of program.
6012 if (!flag) __cxa_guard_abort (&guard);
6016 Note that the `flag' variable is only set to 1 *after* the
6017 initialization is complete. This ensures that an exception,
6018 thrown during the construction, will cause the variable to
6019 reinitialized when we pass through this code again, as per:
6023 If the initialization exits by throwing an exception, the
6024 initialization is not complete, so it will be tried again
6025 the next time control enters the declaration.
6027 This process should be thread-safe, too; multiple threads
6028 should not be able to initialize the variable more than
6031 /* Create the guard variable. */
6032 guard = get_guard (decl);
6034 /* This optimization isn't safe on targets with relaxed memory
6035 consistency. On such targets we force synchronization in
6036 __cxa_guard_acquire. */
6037 if (!targetm.relaxed_ordering || !flag_threadsafe_statics)
6039 /* Begin the conditional initialization. */
6040 if_stmt = begin_if_stmt ();
6041 finish_if_stmt_cond (get_guard_cond (guard), if_stmt);
6042 then_clause = begin_compound_stmt (BCS_NO_SCOPE);
6045 if (flag_threadsafe_statics)
6047 guard_addr = build_address (guard);
6049 acquire_fn = get_identifier ("__cxa_guard_acquire");
6050 release_fn = get_identifier ("__cxa_guard_release");
6051 abort_fn = get_identifier ("__cxa_guard_abort");
6052 if (!get_global_value_if_present (acquire_fn, &acquire_fn))
6054 tree argtypes = tree_cons (NULL_TREE, TREE_TYPE (guard_addr),
6056 tree vfntype = build_function_type (void_type_node, argtypes);
6057 acquire_fn = push_library_fn
6058 (acquire_fn, build_function_type (integer_type_node, argtypes));
6059 release_fn = push_library_fn (release_fn, vfntype);
6060 abort_fn = push_library_fn (abort_fn, vfntype);
6064 release_fn = identifier_global_value (release_fn);
6065 abort_fn = identifier_global_value (abort_fn);
6068 inner_if_stmt = begin_if_stmt ();
6069 finish_if_stmt_cond (build_call_n (acquire_fn, 1, guard_addr),
6072 inner_then_clause = begin_compound_stmt (BCS_NO_SCOPE);
6073 begin = get_target_expr (boolean_false_node);
6074 flag = TARGET_EXPR_SLOT (begin);
6076 TARGET_EXPR_CLEANUP (begin)
6077 = build3 (COND_EXPR, void_type_node, flag,
6079 build_call_n (abort_fn, 1, guard_addr));
6080 CLEANUP_EH_ONLY (begin) = 1;
6082 /* Do the initialization itself. */
6083 init = add_stmt_to_compound (begin, init);
6084 init = add_stmt_to_compound
6085 (init, build2 (MODIFY_EXPR, void_type_node, flag, boolean_true_node));
6086 init = add_stmt_to_compound
6087 (init, build_call_n (release_fn, 1, guard_addr));
6090 init = add_stmt_to_compound (init, set_guard (guard));
6092 /* Use atexit to register a function for destroying this static
6094 init = add_stmt_to_compound (init, register_dtor_fn (decl));
6096 finish_expr_stmt (init);
6098 if (flag_threadsafe_statics)
6100 finish_compound_stmt (inner_then_clause);
6101 finish_then_clause (inner_if_stmt);
6102 finish_if_stmt (inner_if_stmt);
6105 if (!targetm.relaxed_ordering || !flag_threadsafe_statics)
6107 finish_compound_stmt (then_clause);
6108 finish_then_clause (if_stmt);
6109 finish_if_stmt (if_stmt);
6113 static_aggregates = tree_cons (init, decl, static_aggregates);
6117 /* Make TYPE a complete type based on INITIAL_VALUE.
6118 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
6119 2 if there was no information (in which case assume 0 if DO_DEFAULT),
6120 3 if the initializer list is empty (in pedantic mode). */
6123 cp_complete_array_type (tree *ptype, tree initial_value, bool do_default)
6126 tree type, elt_type;
6130 unsigned HOST_WIDE_INT i;
6133 /* An array of character type can be initialized from a
6134 brace-enclosed string constant.
6136 FIXME: this code is duplicated from reshape_init. Probably
6137 we should just call reshape_init here? */
6138 if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (*ptype)))
6139 && TREE_CODE (initial_value) == CONSTRUCTOR
6140 && !VEC_empty (constructor_elt, CONSTRUCTOR_ELTS (initial_value)))
6142 VEC(constructor_elt,gc) *v = CONSTRUCTOR_ELTS (initial_value);
6143 tree value = VEC_index (constructor_elt, v, 0)->value;
6145 if (TREE_CODE (value) == STRING_CST
6146 && VEC_length (constructor_elt, v) == 1)
6147 initial_value = value;
6150 /* If any of the elements are parameter packs, we can't actually
6151 complete this type now because the array size is dependent. */
6152 if (TREE_CODE (initial_value) == CONSTRUCTOR)
6154 FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (initial_value),
6157 if (PACK_EXPANSION_P (value))
6163 failure = complete_array_type (ptype, initial_value, do_default);
6165 /* We can create the array before the element type is complete, which
6166 means that we didn't have these two bits set in the original type
6167 either. In completing the type, we are expected to propagate these
6168 bits. See also complete_type which does the same thing for arrays
6171 if (TYPE_DOMAIN (type))
6173 elt_type = TREE_TYPE (type);
6174 TYPE_NEEDS_CONSTRUCTING (type) = TYPE_NEEDS_CONSTRUCTING (elt_type);
6175 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type)
6176 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (elt_type);
6182 /* Return zero if something is declared to be a member of type
6183 CTYPE when in the context of CUR_TYPE. STRING is the error
6184 message to print in that case. Otherwise, quietly return 1. */
6187 member_function_or_else (tree ctype, tree cur_type, enum overload_flags flags)
6189 if (ctype && ctype != cur_type)
6191 if (flags == DTOR_FLAG)
6192 error ("destructor for alien class %qT cannot be a member", ctype);
6194 error ("constructor for alien class %qT cannot be a member", ctype);
6200 /* Subroutine of `grokdeclarator'. */
6202 /* Generate errors possibly applicable for a given set of specifiers.
6203 This is for ARM $7.1.2. */
6206 bad_specifiers (tree object,
6215 error ("%qD declared as a %<virtual%> %s", object, type);
6217 error ("%qD declared as an %<inline%> %s", object, type);
6219 error ("%<const%> and %<volatile%> function specifiers on "
6220 "%qD invalid in %s declaration",
6223 error ("%q+D declared as a friend", object);
6225 && (TREE_CODE (object) == TYPE_DECL
6226 || (!TYPE_PTRFN_P (TREE_TYPE (object))
6227 && !TYPE_REFFN_P (TREE_TYPE (object))
6228 && !TYPE_PTRMEMFUNC_P (TREE_TYPE (object)))))
6229 error ("%q+D declared with an exception specification", object);
6232 /* DECL is a member function or static data member and is presently
6233 being defined. Check that the definition is taking place in a
6237 check_class_member_definition_namespace (tree decl)
6239 /* These checks only apply to member functions and static data
6241 gcc_assert (TREE_CODE (decl) == FUNCTION_DECL
6242 || TREE_CODE (decl) == VAR_DECL);
6243 /* We check for problems with specializations in pt.c in
6244 check_specialization_namespace, where we can issue better
6246 if (processing_specialization)
6248 /* There are no restrictions on the placement of
6249 explicit instantiations. */
6250 if (processing_explicit_instantiation)
6254 A member function definition that appears outside of the
6255 class definition shall appear in a namespace scope enclosing
6256 the class definition.
6260 The definition for a static data member shall appear in a
6261 namespace scope enclosing the member's class definition. */
6262 if (!is_ancestor (current_namespace, DECL_CONTEXT (decl)))
6263 pedwarn ("definition of %qD is not in namespace enclosing %qT",
6264 decl, DECL_CONTEXT (decl));
6267 /* Build a PARM_DECL for the "this" parameter. TYPE is the
6268 METHOD_TYPE for a non-static member function; QUALS are the
6269 cv-qualifiers that apply to the function. */
6272 build_this_parm (tree type, cp_cv_quals quals)
6277 cp_cv_quals this_quals;
6279 this_type = TREE_VALUE (TYPE_ARG_TYPES (type));
6280 /* The `this' parameter is implicitly `const'; it cannot be
6282 this_quals = (quals & TYPE_QUAL_RESTRICT) | TYPE_QUAL_CONST;
6283 qual_type = cp_build_qualified_type (this_type, this_quals);
6284 parm = build_artificial_parm (this_identifier, qual_type);
6285 cp_apply_type_quals_to_decl (this_quals, parm);
6289 /* CTYPE is class type, or null if non-class.
6290 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
6292 DECLARATOR is the function's name.
6293 PARMS is a chain of PARM_DECLs for the function.
6294 VIRTUALP is truthvalue of whether the function is virtual or not.
6295 FLAGS are to be passed through to `grokclassfn'.
6296 QUALS are qualifiers indicating whether the function is `const'
6298 RAISES is a list of exceptions that this function can raise.
6299 CHECK is 1 if we must find this method in CTYPE, 0 if we should
6300 not look, and -1 if we should not call `grokclassfn' at all.
6302 SFK is the kind of special function (if any) for the new function.
6304 Returns `NULL_TREE' if something goes wrong, after issuing
6305 applicable error messages. */
6308 grokfndecl (tree ctype,
6312 tree orig_declarator,
6314 enum overload_flags flags,
6321 special_function_kind sfk,
6328 int staticp = ctype && TREE_CODE (type) == FUNCTION_TYPE;
6332 type = build_exception_variant (type, raises);
6334 decl = build_lang_decl (FUNCTION_DECL, declarator, type);
6335 if (TREE_CODE (type) == METHOD_TYPE)
6338 parm = build_this_parm (type, quals);
6339 TREE_CHAIN (parm) = parms;
6342 DECL_ARGUMENTS (decl) = parms;
6343 /* Propagate volatile out from type to decl. */
6344 if (TYPE_VOLATILE (type))
6345 TREE_THIS_VOLATILE (decl) = 1;
6347 /* Setup decl according to sfk. */
6350 case sfk_constructor:
6351 case sfk_copy_constructor:
6352 DECL_CONSTRUCTOR_P (decl) = 1;
6354 case sfk_destructor:
6355 DECL_DESTRUCTOR_P (decl) = 1;
6361 /* If pointers to member functions use the least significant bit to
6362 indicate whether a function is virtual, ensure a pointer
6363 to this function will have that bit clear. */
6364 if (TARGET_PTRMEMFUNC_VBIT_LOCATION == ptrmemfunc_vbit_in_pfn
6365 && TREE_CODE (type) == METHOD_TYPE
6366 && DECL_ALIGN (decl) < 2 * BITS_PER_UNIT)
6367 DECL_ALIGN (decl) = 2 * BITS_PER_UNIT;
6370 && TREE_CODE (orig_declarator) == TEMPLATE_ID_EXPR)
6374 ("defining explicit specialization %qD in friend declaration",
6378 tree fns = TREE_OPERAND (orig_declarator, 0);
6379 tree args = TREE_OPERAND (orig_declarator, 1);
6381 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
6383 /* Something like `template <class T> friend void f<T>()'. */
6384 error ("invalid use of template-id %qD in declaration "
6385 "of primary template",
6391 /* A friend declaration of the form friend void f<>(). Record
6392 the information in the TEMPLATE_ID_EXPR. */
6393 SET_DECL_IMPLICIT_INSTANTIATION (decl);
6395 if (TREE_CODE (fns) == COMPONENT_REF)
6397 /* Due to bison parser ickiness, we will have already looked
6398 up an operator_name or PFUNCNAME within the current class
6399 (see template_id in parse.y). If the current class contains
6400 such a name, we'll get a COMPONENT_REF here. Undo that. */
6402 gcc_assert (TREE_TYPE (TREE_OPERAND (fns, 0))
6403 == current_class_type);
6404 fns = TREE_OPERAND (fns, 1);
6406 gcc_assert (TREE_CODE (fns) == IDENTIFIER_NODE
6407 || TREE_CODE (fns) == OVERLOAD);
6408 DECL_TEMPLATE_INFO (decl) = tree_cons (fns, args, NULL_TREE);
6410 for (t = TYPE_ARG_TYPES (TREE_TYPE (decl)); t; t = TREE_CHAIN (t))
6411 if (TREE_PURPOSE (t)
6412 && TREE_CODE (TREE_PURPOSE (t)) == DEFAULT_ARG)
6414 error ("default arguments are not allowed in declaration "
6415 "of friend template specialization %qD",
6422 error ("%<inline%> is not allowed in declaration of friend "
6423 "template specialization %qD",
6430 /* If this decl has namespace scope, set that up. */
6432 set_decl_namespace (decl, in_namespace, friendp);
6434 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
6436 /* `main' and builtins have implicit 'C' linkage. */
6437 if ((MAIN_NAME_P (declarator)
6438 || (IDENTIFIER_LENGTH (declarator) > 10
6439 && IDENTIFIER_POINTER (declarator)[0] == '_'
6440 && IDENTIFIER_POINTER (declarator)[1] == '_'
6441 && strncmp (IDENTIFIER_POINTER (declarator)+2, "builtin_", 8) == 0))
6442 && current_lang_name == lang_name_cplusplus
6443 && ctype == NULL_TREE
6444 /* NULL_TREE means global namespace. */
6445 && DECL_CONTEXT (decl) == NULL_TREE)
6446 SET_DECL_LANGUAGE (decl, lang_c);
6448 /* Should probably propagate const out from type to decl I bet (mrs). */
6451 DECL_STATIC_FUNCTION_P (decl) = 1;
6452 DECL_CONTEXT (decl) = ctype;
6457 DECL_CONTEXT (decl) = ctype;
6459 check_class_member_definition_namespace (decl);
6462 if (ctype == NULL_TREE && DECL_MAIN_P (decl))
6464 if (processing_template_decl)
6465 error ("cannot declare %<::main%> to be a template");
6467 error ("cannot declare %<::main%> to be inline");
6469 error ("cannot declare %<::main%> to be static");
6474 /* Members of anonymous types and local classes have no linkage; make
6475 them internal. If a typedef is made later, this will be changed. */
6476 if (ctype && (TYPE_ANONYMOUS_P (ctype)
6477 || decl_function_context (TYPE_MAIN_DECL (ctype))))
6482 /* [basic.link]: A name with no linkage (notably, the name of a class
6483 or enumeration declared in a local scope) shall not be used to
6484 declare an entity with linkage.
6486 Only check this for public decls for now. See core 319, 389. */
6487 t = no_linkage_check (TREE_TYPE (decl),
6488 /*relaxed_p=*/false);
6491 if (TYPE_ANONYMOUS_P (t))
6493 if (DECL_EXTERN_C_P (decl))
6494 /* Allow this; it's pretty common in C. */;
6497 pedwarn ("non-local function %q#D uses anonymous type",
6499 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
6500 pedwarn ("%q+#D does not refer to the unqualified "
6501 "type, so it is not used for linkage",
6506 pedwarn ("non-local function %q#D uses local type %qT", decl, t);
6510 TREE_PUBLIC (decl) = publicp;
6513 DECL_INTERFACE_KNOWN (decl) = 1;
6514 DECL_NOT_REALLY_EXTERN (decl) = 1;
6517 /* If the declaration was declared inline, mark it as such. */
6519 DECL_DECLARED_INLINE_P (decl) = 1;
6520 /* We inline functions that are explicitly declared inline, or, when
6521 the user explicitly asks us to, all functions. */
6522 if (DECL_DECLARED_INLINE_P (decl)
6523 || (flag_inline_trees == 2 && !DECL_INLINE (decl) && funcdef_flag))
6524 DECL_INLINE (decl) = 1;
6526 DECL_EXTERNAL (decl) = 1;
6527 if (quals && TREE_CODE (type) == FUNCTION_TYPE)
6530 ? G_("static member function %qD cannot have cv-qualifier")
6531 : G_("non-member function %qD cannot have cv-qualifier"),
6533 quals = TYPE_UNQUALIFIED;
6536 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl))
6537 && !grok_op_properties (decl, /*complain=*/true))
6540 if (ctype && decl_function_context (decl))
6541 DECL_NO_STATIC_CHAIN (decl) = 1;
6544 /* Make the init_value nonzero so pushdecl knows this is not
6545 tentative. error_mark_node is replaced later with the BLOCK. */
6546 DECL_INITIAL (decl) = error_mark_node;
6548 if (TYPE_NOTHROW_P (type) || nothrow_libfn_p (decl))
6549 TREE_NOTHROW (decl) = 1;
6551 /* Caller will do the rest of this. */
6555 if (ctype != NULL_TREE)
6556 grokclassfn (ctype, decl, flags);
6558 decl = check_explicit_specialization (orig_declarator, decl,
6561 4 * (friendp != 0));
6562 if (decl == error_mark_node)
6567 cplus_decl_attributes (&decl, *attrlist, 0);
6568 *attrlist = NULL_TREE;
6571 /* Check main's type after attributes have been applied. */
6572 if (ctype == NULL_TREE && DECL_MAIN_P (decl))
6574 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl)),
6577 tree oldtypeargs = TYPE_ARG_TYPES (TREE_TYPE (decl));
6579 error ("%<::main%> must return %<int%>");
6580 newtype = build_function_type (integer_type_node, oldtypeargs);
6581 TREE_TYPE (decl) = newtype;
6583 check_main_parameter_types (decl);
6586 if (ctype != NULL_TREE
6587 && (! TYPE_FOR_JAVA (ctype) || check_java_method (decl))
6590 tree old_decl = check_classfn (ctype, decl,
6591 (processing_template_decl
6592 > template_class_depth (ctype))
6593 ? current_template_parms
6596 if (old_decl == error_mark_node)
6604 if (TREE_CODE (old_decl) == TEMPLATE_DECL)
6605 /* Because grokfndecl is always supposed to return a
6606 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
6607 here. We depend on our callers to figure out that its
6608 really a template that's being returned. */
6609 old_decl = DECL_TEMPLATE_RESULT (old_decl);
6611 if (DECL_STATIC_FUNCTION_P (old_decl)
6612 && TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE)
6613 /* Remove the `this' parm added by grokclassfn.
6614 XXX Isn't this done in start_function, too? */
6615 revert_static_member_fn (decl);
6616 if (DECL_ARTIFICIAL (old_decl))
6618 error ("definition of implicitly-declared %qD", old_decl);
6622 /* Since we've smashed OLD_DECL to its
6623 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
6624 if (TREE_CODE (decl) == TEMPLATE_DECL)
6625 decl = DECL_TEMPLATE_RESULT (decl);
6627 /* Attempt to merge the declarations. This can fail, in
6628 the case of some invalid specialization declarations. */
6629 pushed_scope = push_scope (ctype);
6630 ok = duplicate_decls (decl, old_decl, friendp);
6632 pop_scope (pushed_scope);
6635 error ("no %q#D member function declared in class %qT",
6643 if (DECL_CONSTRUCTOR_P (decl) && !grok_ctor_properties (ctype, decl))
6646 if (ctype == NULL_TREE || check)
6650 DECL_VIRTUAL_P (decl) = 1;
6655 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
6656 the linkage that DECL will receive in the object file. */
6659 set_linkage_for_static_data_member (tree decl)
6661 /* A static data member always has static storage duration and
6662 external linkage. Note that static data members are forbidden in
6663 local classes -- the only situation in which a class has
6664 non-external linkage. */
6665 TREE_PUBLIC (decl) = 1;
6666 TREE_STATIC (decl) = 1;
6667 /* For non-template classes, static data members are always put
6668 out in exactly those files where they are defined, just as
6669 with ordinary namespace-scope variables. */
6670 if (!processing_template_decl)
6671 DECL_INTERFACE_KNOWN (decl) = 1;
6674 /* Create a VAR_DECL named NAME with the indicated TYPE.
6676 If SCOPE is non-NULL, it is the class type or namespace containing
6677 the variable. If SCOPE is NULL, the variable should is created in
6678 the innermost enclosings scope. */
6681 grokvardecl (tree type,
6683 const cp_decl_specifier_seq *declspecs,
6689 tree explicit_scope;
6691 gcc_assert (!name || TREE_CODE (name) == IDENTIFIER_NODE);
6693 /* Compute the scope in which to place the variable, but remember
6694 whether or not that scope was explicitly specified by the user. */
6695 explicit_scope = scope;
6698 /* An explicit "extern" specifier indicates a namespace-scope
6700 if (declspecs->storage_class == sc_extern)
6701 scope = current_namespace;
6702 else if (!at_function_scope_p ())
6703 scope = current_scope ();
6707 && (/* If the variable is a namespace-scope variable declared in a
6708 template, we need DECL_LANG_SPECIFIC. */
6709 (TREE_CODE (scope) == NAMESPACE_DECL && processing_template_decl)
6710 /* Similarly for namespace-scope variables with language linkage
6712 || (TREE_CODE (scope) == NAMESPACE_DECL
6713 && current_lang_name != lang_name_cplusplus)
6714 /* Similarly for static data members. */
6716 decl = build_lang_decl (VAR_DECL, name, type);
6718 decl = build_decl (VAR_DECL, name, type);
6720 if (explicit_scope && TREE_CODE (explicit_scope) == NAMESPACE_DECL)
6721 set_decl_namespace (decl, explicit_scope, 0);
6723 DECL_CONTEXT (decl) = FROB_CONTEXT (scope);
6725 if (declspecs->storage_class == sc_extern)
6727 DECL_THIS_EXTERN (decl) = 1;
6728 DECL_EXTERNAL (decl) = !initialized;
6731 if (DECL_CLASS_SCOPE_P (decl))
6733 set_linkage_for_static_data_member (decl);
6734 /* This function is only called with out-of-class definitions. */
6735 DECL_EXTERNAL (decl) = 0;
6736 check_class_member_definition_namespace (decl);
6738 /* At top level, either `static' or no s.c. makes a definition
6739 (perhaps tentative), and absence of `static' makes it public. */
6740 else if (toplevel_bindings_p ())
6742 TREE_PUBLIC (decl) = (declspecs->storage_class != sc_static
6743 && (DECL_THIS_EXTERN (decl) || ! constp));
6744 TREE_STATIC (decl) = ! DECL_EXTERNAL (decl);
6746 /* Not at top level, only `static' makes a static definition. */
6749 TREE_STATIC (decl) = declspecs->storage_class == sc_static;
6750 TREE_PUBLIC (decl) = DECL_EXTERNAL (decl);
6753 if (declspecs->specs[(int)ds_thread])
6754 DECL_TLS_MODEL (decl) = decl_default_tls_model (decl);
6756 if (TREE_PUBLIC (decl))
6758 /* [basic.link]: A name with no linkage (notably, the name of a class
6759 or enumeration declared in a local scope) shall not be used to
6760 declare an entity with linkage.
6762 Only check this for public decls for now. */
6763 tree t = no_linkage_check (TREE_TYPE (decl), /*relaxed_p=*/false);
6766 if (TYPE_ANONYMOUS_P (t))
6768 if (DECL_EXTERN_C_P (decl))
6769 /* Allow this; it's pretty common in C. */
6773 /* DRs 132, 319 and 389 seem to indicate types with
6774 no linkage can only be used to declare extern "C"
6775 entities. Since it's not always an error in the
6776 ISO C++ 90 Standard, we only issue a warning. */
6777 warning (0, "non-local variable %q#D uses anonymous type",
6779 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
6780 warning (0, "%q+#D does not refer to the unqualified "
6781 "type, so it is not used for linkage",
6786 warning (0, "non-local variable %q#D uses local type %qT", decl, t);
6790 DECL_INTERFACE_KNOWN (decl) = 1;
6795 /* Create and return a canonical pointer to member function type, for
6796 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
6799 build_ptrmemfunc_type (tree type)
6803 tree unqualified_variant = NULL_TREE;
6805 if (type == error_mark_node)
6808 /* If a canonical type already exists for this type, use it. We use
6809 this method instead of type_hash_canon, because it only does a
6810 simple equality check on the list of field members. */
6812 if ((t = TYPE_GET_PTRMEMFUNC_TYPE (type)))
6815 /* Make sure that we always have the unqualified pointer-to-member
6817 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
6819 = build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type));
6821 t = make_aggr_type (RECORD_TYPE);
6822 xref_basetypes (t, NULL_TREE);
6824 /* Let the front end know this is a pointer to member function... */
6825 TYPE_PTRMEMFUNC_FLAG (t) = 1;
6826 /* ... and not really an aggregate. */
6827 SET_IS_AGGR_TYPE (t, 0);
6829 field = build_decl (FIELD_DECL, pfn_identifier, type);
6832 field = build_decl (FIELD_DECL, delta_identifier, delta_type_node);
6833 TREE_CHAIN (field) = fields;
6836 finish_builtin_struct (t, "__ptrmemfunc_type", fields, ptr_type_node);
6838 /* Zap out the name so that the back end will give us the debugging
6839 information for this anonymous RECORD_TYPE. */
6840 TYPE_NAME (t) = NULL_TREE;
6842 /* If this is not the unqualified form of this pointer-to-member
6843 type, set the TYPE_MAIN_VARIANT for this type to be the
6844 unqualified type. Since they are actually RECORD_TYPEs that are
6845 not variants of each other, we must do this manually. */
6846 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
6848 t = build_qualified_type (t, cp_type_quals (type));
6849 TYPE_MAIN_VARIANT (t) = unqualified_variant;
6850 TYPE_NEXT_VARIANT (t) = TYPE_NEXT_VARIANT (unqualified_variant);
6851 TYPE_NEXT_VARIANT (unqualified_variant) = t;
6854 /* Cache this pointer-to-member type so that we can find it again
6856 TYPE_SET_PTRMEMFUNC_TYPE (type, t);
6858 /* Managing canonical types for the RECORD_TYPE behind a
6859 pointer-to-member function is a nightmare, so use structural
6860 equality for now. */
6861 SET_TYPE_STRUCTURAL_EQUALITY (t);
6866 /* Create and return a pointer to data member type. */
6869 build_ptrmem_type (tree class_type, tree member_type)
6871 if (TREE_CODE (member_type) == METHOD_TYPE)
6875 arg_types = TYPE_ARG_TYPES (member_type);
6876 class_type = (cp_build_qualified_type
6878 cp_type_quals (TREE_TYPE (TREE_VALUE (arg_types)))));
6880 = build_method_type_directly (class_type,
6881 TREE_TYPE (member_type),
6882 TREE_CHAIN (arg_types));
6883 return build_ptrmemfunc_type (build_pointer_type (member_type));
6887 gcc_assert (TREE_CODE (member_type) != FUNCTION_TYPE);
6888 return build_offset_type (class_type, member_type);
6892 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
6893 Check to see that the definition is valid. Issue appropriate error
6894 messages. Return 1 if the definition is particularly bad, or 0
6898 check_static_variable_definition (tree decl, tree type)
6900 /* Motion 10 at San Diego: If a static const integral data member is
6901 initialized with an integral constant expression, the initializer
6902 may appear either in the declaration (within the class), or in
6903 the definition, but not both. If it appears in the class, the
6904 member is a member constant. The file-scope definition is always
6906 if (!ARITHMETIC_TYPE_P (type) && TREE_CODE (type) != ENUMERAL_TYPE)
6908 error ("invalid in-class initialization of static data member "
6909 "of non-integral type %qT",
6911 /* If we just return the declaration, crashes will sometimes
6912 occur. We therefore return void_type_node, as if this were a
6913 friend declaration, to cause callers to completely ignore
6914 this declaration. */
6917 else if (!CP_TYPE_CONST_P (type))
6918 error ("ISO C++ forbids in-class initialization of non-const "
6919 "static member %qD",
6921 else if (pedantic && !INTEGRAL_TYPE_P (type))
6922 pedwarn ("ISO C++ forbids initialization of member constant "
6923 "%qD of non-integral type %qT", decl, type);
6928 /* Given the SIZE (i.e., number of elements) in an array, compute an
6929 appropriate index type for the array. If non-NULL, NAME is the
6930 name of the thing being declared. */
6933 compute_array_index_type (tree name, tree size)
6937 tree abi_1_itype = NULL_TREE;
6939 if (error_operand_p (size))
6940 return error_mark_node;
6942 type = TREE_TYPE (size);
6943 /* The array bound must be an integer type. */
6944 if (!dependent_type_p (type) && !INTEGRAL_TYPE_P (type))
6947 error ("size of array %qD has non-integral type %qT", name, type);
6949 error ("size of array has non-integral type %qT", type);
6950 size = integer_one_node;
6951 type = TREE_TYPE (size);
6954 if (value_dependent_expression_p (size))
6956 /* We cannot do any checking for a value-dependent SIZE. Just
6957 build the index type and mark that it requires structural
6959 itype = build_index_type (build_min (MINUS_EXPR, sizetype,
6960 size, integer_one_node));
6961 SET_TYPE_STRUCTURAL_EQUALITY (itype);
6965 if (!abi_version_at_least (2) && processing_template_decl)
6966 /* For abi-1, we handled all instances in templates the same way,
6967 even when they were non-dependent. This effects the manglings
6968 produced. So, we do the normal checking for non-dependent
6969 sizes, but at the end we'll return the same type that abi-1
6970 would have, but with TYPE_CANONICAL set to the "right"
6971 value that the current ABI would provide. */
6972 abi_1_itype = build_index_type (build_min (MINUS_EXPR, sizetype,
6973 size, integer_one_node));
6975 /* The size might be the result of a cast. */
6976 STRIP_TYPE_NOPS (size);
6978 /* It might be a const variable or enumeration constant. */
6979 size = integral_constant_value (size);
6981 /* Normally, the array-bound will be a constant. */
6982 if (TREE_CODE (size) == INTEGER_CST)
6984 /* Check to see if the array bound overflowed. Make that an
6985 error, no matter how generous we're being. */
6986 int old_flag_pedantic_errors = flag_pedantic_errors;
6987 int old_pedantic = pedantic;
6988 pedantic = flag_pedantic_errors = 1;
6989 constant_expression_warning (size);
6990 pedantic = old_pedantic;
6991 flag_pedantic_errors = old_flag_pedantic_errors;
6993 /* An array must have a positive number of elements. */
6994 if (INT_CST_LT (size, integer_zero_node))
6997 error ("size of array %qD is negative", name);
6999 error ("size of array is negative");
7000 size = integer_one_node;
7002 /* As an extension we allow zero-sized arrays. We always allow
7003 them in system headers because glibc uses them. */
7004 else if (integer_zerop (size) && pedantic && !in_system_header)
7007 pedwarn ("ISO C++ forbids zero-size array %qD", name);
7009 pedwarn ("ISO C++ forbids zero-size array");
7012 else if (TREE_CONSTANT (size))
7014 /* `(int) &fn' is not a valid array bound. */
7016 error ("size of array %qD is not an integral constant-expression",
7019 error ("size of array is not an integral constant-expression");
7020 size = integer_one_node;
7022 else if (pedantic && warn_vla != 0)
7025 pedwarn ("ISO C++ forbids variable length array %qD", name);
7027 pedwarn ("ISO C++ forbids variable length array");
7029 else if (warn_vla > 0)
7033 "variable length array %qD is used", name);
7036 "variable length array is used");
7039 if (processing_template_decl && !TREE_CONSTANT (size))
7040 /* A variable sized array. */
7041 itype = build_min (MINUS_EXPR, sizetype, size, integer_one_node);
7044 HOST_WIDE_INT saved_processing_template_decl;
7046 /* Compute the index of the largest element in the array. It is
7047 one less than the number of elements in the array. We save
7048 and restore PROCESSING_TEMPLATE_DECL so that computations in
7049 cp_build_binary_op will be appropriately folded. */
7050 saved_processing_template_decl = processing_template_decl;
7051 processing_template_decl = 0;
7052 itype = cp_build_binary_op (MINUS_EXPR,
7053 cp_convert (ssizetype, size),
7054 cp_convert (ssizetype, integer_one_node));
7055 itype = fold (itype);
7056 processing_template_decl = saved_processing_template_decl;
7058 if (!TREE_CONSTANT (itype))
7059 /* A variable sized array. */
7060 itype = variable_size (itype);
7061 /* Make sure that there was no overflow when creating to a signed
7062 index type. (For example, on a 32-bit machine, an array with
7063 size 2^32 - 1 is too big.) */
7064 else if (TREE_CODE (itype) == INTEGER_CST
7065 && TREE_OVERFLOW (itype))
7067 error ("overflow in array dimension");
7068 TREE_OVERFLOW (itype) = 0;
7072 /* Create and return the appropriate index type. */
7075 tree t = build_index_type (itype);
7076 TYPE_CANONICAL (abi_1_itype) = TYPE_CANONICAL (t);
7080 return build_index_type (itype);
7083 /* Returns the scope (if any) in which the entity declared by
7084 DECLARATOR will be located. If the entity was declared with an
7085 unqualified name, NULL_TREE is returned. */
7088 get_scope_of_declarator (const cp_declarator *declarator)
7090 while (declarator && declarator->kind != cdk_id)
7091 declarator = declarator->declarator;
7093 /* If the declarator-id is a SCOPE_REF, the scope in which the
7094 declaration occurs is the first operand. */
7096 && declarator->u.id.qualifying_scope)
7097 return declarator->u.id.qualifying_scope;
7099 /* Otherwise, the declarator is not a qualified name; the entity will
7100 be declared in the current scope. */
7104 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
7105 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
7109 create_array_type_for_decl (tree name, tree type, tree size)
7111 tree itype = NULL_TREE;
7112 const char* error_msg;
7114 /* If things have already gone awry, bail now. */
7115 if (type == error_mark_node || size == error_mark_node)
7116 return error_mark_node;
7118 /* Assume that everything will go OK. */
7121 /* There are some types which cannot be array elements. */
7122 switch (TREE_CODE (type))
7125 error_msg = "array of void";
7129 error_msg = "array of functions";
7132 case REFERENCE_TYPE:
7133 error_msg = "array of references";
7137 error_msg = "array of function members";
7144 /* If something went wrong, issue an error-message and return. */
7148 error ("declaration of %qD as %s", name, error_msg);
7150 error ("creating %s", error_msg);
7152 return error_mark_node;
7157 The constant expressions that specify the bounds of the arrays
7158 can be omitted only for the first member of the sequence. */
7159 if (TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type))
7162 error ("declaration of %qD as multidimensional array must "
7163 "have bounds for all dimensions except the first",
7166 error ("multidimensional array must have bounds for all "
7167 "dimensions except the first");
7169 return error_mark_node;
7172 /* Figure out the index type for the array. */
7174 itype = compute_array_index_type (name, size);
7177 T is called the array element type; this type shall not be [...] an
7178 abstract class type. */
7179 abstract_virtuals_error (name, type);
7181 return build_cplus_array_type (type, itype);
7184 /* Check that it's OK to declare a function with the indicated TYPE.
7185 SFK indicates the kind of special function (if any) that this
7186 function is. OPTYPE is the type given in a conversion operator
7187 declaration, or the class type for a constructor/destructor.
7188 Returns the actual return type of the function; that
7189 may be different than TYPE if an error occurs, or for certain
7190 special functions. */
7193 check_special_function_return_type (special_function_kind sfk,
7199 case sfk_constructor:
7201 error ("return type specification for constructor invalid");
7203 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
7204 type = build_pointer_type (optype);
7206 type = void_type_node;
7209 case sfk_destructor:
7211 error ("return type specification for destructor invalid");
7212 /* We can't use the proper return type here because we run into
7213 problems with ambiguous bases and covariant returns.
7214 Java classes are left unchanged because (void *) isn't a valid
7215 Java type, and we don't want to change the Java ABI. */
7216 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
7217 type = build_pointer_type (void_type_node);
7219 type = void_type_node;
7222 case sfk_conversion:
7224 error ("return type specified for %<operator %T%>", optype);
7235 /* A variable or data member (whose unqualified name is IDENTIFIER)
7236 has been declared with the indicated TYPE. If the TYPE is not
7237 acceptable, issue an error message and return a type to use for
7238 error-recovery purposes. */
7241 check_var_type (tree identifier, tree type)
7243 if (VOID_TYPE_P (type))
7246 error ("unnamed variable or field declared void");
7247 else if (TREE_CODE (identifier) == IDENTIFIER_NODE)
7249 gcc_assert (!IDENTIFIER_OPNAME_P (identifier));
7250 error ("variable or field %qE declared void", identifier);
7253 error ("variable or field declared void");
7254 type = error_mark_node;
7260 /* Given declspecs and a declarator (abstract or otherwise), determine
7261 the name and type of the object declared and construct a DECL node
7264 DECLSPECS points to the representation of declaration-specifier
7265 sequence that precedes declarator.
7267 DECL_CONTEXT says which syntactic context this declaration is in:
7268 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
7269 FUNCDEF for a function definition. Like NORMAL but a few different
7270 error messages in each case. Return value may be zero meaning
7271 this definition is too screwy to try to parse.
7272 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
7273 handle member functions (which have FIELD context).
7274 Return value may be zero meaning this definition is too screwy to
7276 PARM for a parameter declaration (either within a function prototype
7277 or before a function body). Make a PARM_DECL, or return void_type_node.
7278 CATCHPARM for a parameter declaration before a catch clause.
7279 TYPENAME if for a typename (in a cast or sizeof).
7280 Don't make a DECL node; just return the ..._TYPE node.
7281 FIELD for a struct or union field; make a FIELD_DECL.
7282 BITFIELD for a field with specified width.
7283 INITIALIZED is 1 if the decl has an initializer.
7285 ATTRLIST is a pointer to the list of attributes, which may be NULL
7286 if there are none; *ATTRLIST may be modified if attributes from inside
7287 the declarator should be applied to the declaration.
7289 When this function is called, scoping variables (such as
7290 CURRENT_CLASS_TYPE) should reflect the scope in which the
7291 declaration occurs, not the scope in which the new declaration will
7292 be placed. For example, on:
7296 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
7299 Returns a DECL (if a declarator is present), a TYPE (if there is no
7300 declarator, in cases like "struct S;"), or the ERROR_MARK_NODE if an
7304 grokdeclarator (const cp_declarator *declarator,
7305 const cp_decl_specifier_seq *declspecs,
7306 enum decl_context decl_context,
7310 tree type = NULL_TREE;
7312 int virtualp, explicitp, friendp, inlinep, staticp;
7313 int explicit_int = 0;
7314 int explicit_char = 0;
7315 int defaulted_int = 0;
7316 tree dependent_name = NULL_TREE;
7318 tree typedef_decl = NULL_TREE;
7319 const char *name = NULL;
7320 tree typedef_type = NULL_TREE;
7321 /* True if this declarator is a function definition. */
7322 bool funcdef_flag = false;
7323 cp_declarator_kind innermost_code = cdk_error;
7326 /* See the code below that used this. */
7327 tree decl_attr = NULL_TREE;
7330 /* Keep track of what sort of function is being processed
7331 so that we can warn about default return values, or explicit
7332 return values which do not match prescribed defaults. */
7333 special_function_kind sfk = sfk_none;
7335 tree dname = NULL_TREE;
7336 tree ctor_return_type = NULL_TREE;
7337 enum overload_flags flags = NO_SPECIAL;
7338 /* cv-qualifiers that apply to the declarator, for a declaration of
7339 a member function. */
7340 cp_cv_quals memfn_quals = TYPE_UNQUALIFIED;
7341 /* cv-qualifiers that apply to the type specified by the DECLSPECS. */
7343 tree raises = NULL_TREE;
7344 int template_count = 0;
7345 tree returned_attrs = NULL_TREE;
7346 tree parms = NULL_TREE;
7347 const cp_declarator *id_declarator;
7348 /* The unqualified name of the declarator; either an
7349 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
7350 tree unqualified_id;
7351 /* The class type, if any, in which this entity is located,
7352 or NULL_TREE if none. Note that this value may be different from
7353 the current class type; for example if an attempt is made to declare
7354 "A::f" inside "B", this value will be "A". */
7355 tree ctype = current_class_type;
7356 /* The NAMESPACE_DECL for the namespace in which this entity is
7357 located. If an unqualified name is used to declare the entity,
7358 this value will be NULL_TREE, even if the entity is located at
7360 tree in_namespace = NULL_TREE;
7361 cp_storage_class storage_class;
7362 bool unsigned_p, signed_p, short_p, long_p, thread_p;
7363 bool type_was_error_mark_node = false;
7364 bool parameter_pack_p = declarator? declarator->parameter_pack_p : false;
7365 bool set_no_warning = false;
7367 signed_p = declspecs->specs[(int)ds_signed];
7368 unsigned_p = declspecs->specs[(int)ds_unsigned];
7369 short_p = declspecs->specs[(int)ds_short];
7370 long_p = declspecs->specs[(int)ds_long];
7371 longlong = declspecs->specs[(int)ds_long] >= 2;
7372 thread_p = declspecs->specs[(int)ds_thread];
7374 if (decl_context == FUNCDEF)
7375 funcdef_flag = true, decl_context = NORMAL;
7376 else if (decl_context == MEMFUNCDEF)
7377 funcdef_flag = true, decl_context = FIELD;
7378 else if (decl_context == BITFIELD)
7379 bitfield = 1, decl_context = FIELD;
7381 /* Look inside a declarator for the name being declared
7382 and get it as a string, for an error message. */
7383 for (id_declarator = declarator;
7385 id_declarator = id_declarator->declarator)
7387 if (id_declarator->kind != cdk_id)
7388 innermost_code = id_declarator->kind;
7390 switch (id_declarator->kind)
7393 if (id_declarator->declarator
7394 && id_declarator->declarator->kind == cdk_id)
7396 sfk = id_declarator->declarator->u.id.sfk;
7397 if (sfk == sfk_destructor)
7404 tree qualifying_scope = id_declarator->u.id.qualifying_scope;
7405 tree decl = id_declarator->u.id.unqualified_name;
7408 if (qualifying_scope)
7410 if (at_function_scope_p ())
7414 A declarator-id shall not be qualified except
7417 None of the cases are permitted in block
7419 if (qualifying_scope == global_namespace)
7420 error ("invalid use of qualified-name %<::%D%>",
7422 else if (TYPE_P (qualifying_scope))
7423 error ("invalid use of qualified-name %<%T::%D%>",
7424 qualifying_scope, decl);
7426 error ("invalid use of qualified-name %<%D::%D%>",
7427 qualifying_scope, decl);
7428 return error_mark_node;
7430 else if (TYPE_P (qualifying_scope))
7432 ctype = qualifying_scope;
7433 if (innermost_code != cdk_function
7434 && current_class_type
7435 && !UNIQUELY_DERIVED_FROM_P (ctype,
7436 current_class_type))
7438 error ("type %qT is not derived from type %qT",
7439 ctype, current_class_type);
7440 return error_mark_node;
7443 else if (TREE_CODE (qualifying_scope) == NAMESPACE_DECL)
7444 in_namespace = qualifying_scope;
7446 switch (TREE_CODE (decl))
7452 if (innermost_code != cdk_function)
7454 error ("declaration of %qD as non-function", decl);
7455 return error_mark_node;
7457 else if (!qualifying_scope
7458 && !(current_class_type && at_class_scope_p ()))
7460 error ("declaration of %qD as non-member", decl);
7461 return error_mark_node;
7464 type = TREE_OPERAND (decl, 0);
7465 name = IDENTIFIER_POINTER (constructor_name (type));
7470 case TEMPLATE_ID_EXPR:
7472 tree fns = TREE_OPERAND (decl, 0);
7475 if (TREE_CODE (dname) != IDENTIFIER_NODE)
7477 gcc_assert (is_overloaded_fn (dname));
7478 dname = DECL_NAME (get_first_fn (dname));
7483 case IDENTIFIER_NODE:
7484 if (TREE_CODE (decl) == IDENTIFIER_NODE)
7487 if (C_IS_RESERVED_WORD (dname))
7489 error ("declarator-id missing; using reserved word %qD",
7491 name = IDENTIFIER_POINTER (dname);
7493 else if (!IDENTIFIER_TYPENAME_P (dname))
7494 name = IDENTIFIER_POINTER (dname);
7497 gcc_assert (flags == NO_SPECIAL);
7498 flags = TYPENAME_FLAG;
7499 ctor_return_type = TREE_TYPE (dname);
7500 sfk = sfk_conversion;
7501 if (is_typename_at_global_scope (dname))
7502 name = IDENTIFIER_POINTER (dname);
7504 name = "<invalid operator>";
7521 return error_mark_node;
7526 if (id_declarator->kind == cdk_id)
7532 The declarator in a function-definition shall have the form
7533 D1 ( parameter-declaration-clause) ... */
7534 if (funcdef_flag && innermost_code != cdk_function)
7536 error ("function definition does not declare parameters");
7537 return error_mark_node;
7540 if (((dname && IDENTIFIER_OPNAME_P (dname)) || flags == TYPENAME_FLAG)
7541 && innermost_code != cdk_function
7542 && ! (ctype && !declspecs->any_specifiers_p))
7544 error ("declaration of %qD as non-function", dname);
7545 return error_mark_node;
7548 /* Anything declared one level down from the top level
7549 must be one of the parameters of a function
7550 (because the body is at least two levels down). */
7552 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
7553 by not allowing C++ class definitions to specify their parameters
7554 with xdecls (must be spec.d in the parmlist).
7556 Since we now wait to push a class scope until we are sure that
7557 we are in a legitimate method context, we must set oldcname
7558 explicitly (since current_class_name is not yet alive).
7560 We also want to avoid calling this a PARM if it is in a namespace. */
7562 if (decl_context == NORMAL && !toplevel_bindings_p ())
7564 struct cp_binding_level *b = current_binding_level;
7565 current_binding_level = b->level_chain;
7566 if (current_binding_level != 0 && toplevel_bindings_p ())
7567 decl_context = PARM;
7568 current_binding_level = b;
7572 name = decl_context == PARM ? "parameter" : "type name";
7574 /* If there were multiple types specified in the decl-specifier-seq,
7575 issue an error message. */
7576 if (declspecs->multiple_types_p)
7578 error ("two or more data types in declaration of %qs", name);
7579 return error_mark_node;
7582 if (declspecs->conflicting_specifiers_p)
7584 error ("conflicting specifiers in declaration of %qs", name);
7585 return error_mark_node;
7588 /* Extract the basic type from the decl-specifier-seq. */
7589 type = declspecs->type;
7590 if (type == error_mark_node)
7593 type_was_error_mark_node = true;
7595 /* If the entire declaration is itself tagged as deprecated then
7596 suppress reports of deprecated items. */
7597 if (type && TREE_DEPRECATED (type)
7598 && deprecated_state != DEPRECATED_SUPPRESS)
7599 warn_deprecated_use (type);
7600 if (type && TREE_CODE (type) == TYPE_DECL)
7602 typedef_decl = type;
7603 type = TREE_TYPE (typedef_decl);
7604 if (TREE_DEPRECATED (type)
7605 && DECL_ARTIFICIAL (typedef_decl)
7606 && deprecated_state != DEPRECATED_SUPPRESS)
7607 warn_deprecated_use (type);
7609 /* No type at all: default to `int', and set DEFAULTED_INT
7610 because it was not a user-defined typedef. */
7611 if (type == NULL_TREE && (signed_p || unsigned_p || long_p || short_p))
7613 /* These imply 'int'. */
7614 type = integer_type_node;
7618 explicit_int = declspecs->explicit_int_p;
7619 explicit_char = declspecs->explicit_char_p;
7622 /* See the code below that used this. */
7624 decl_attr = DECL_ATTRIBUTES (typedef_decl);
7626 typedef_type = type;
7629 if (sfk != sfk_conversion)
7630 ctor_return_type = ctype;
7632 if (sfk != sfk_none)
7633 type = check_special_function_return_type (sfk, type,
7635 else if (type == NULL_TREE)
7641 /* We handle `main' specially here, because 'main () { }' is so
7642 common. With no options, it is allowed. With -Wreturn-type,
7643 it is a warning. It is only an error with -pedantic-errors. */
7644 is_main = (funcdef_flag
7645 && dname && MAIN_NAME_P (dname)
7646 && ctype == NULL_TREE
7647 && in_namespace == NULL_TREE
7648 && current_namespace == global_namespace);
7650 if (type_was_error_mark_node)
7651 /* We've already issued an error, don't complain more. */;
7652 else if (in_system_header || flag_ms_extensions)
7653 /* Allow it, sigh. */;
7654 else if (pedantic || ! is_main)
7655 pedwarn ("ISO C++ forbids declaration of %qs with no type", name);
7657 warning (OPT_Wreturn_type,
7658 "ISO C++ forbids declaration of %qs with no type", name);
7660 type = integer_type_node;
7665 /* Now process the modifiers that were specified
7666 and check for invalid combinations. */
7668 /* Long double is a special combination. */
7669 if (long_p && !longlong && TYPE_MAIN_VARIANT (type) == double_type_node)
7672 type = build_qualified_type (long_double_type_node,
7673 cp_type_quals (type));
7676 /* Check all other uses of type modifiers. */
7678 if (unsigned_p || signed_p || long_p || short_p)
7682 if ((signed_p || unsigned_p) && TREE_CODE (type) != INTEGER_TYPE)
7683 error ("%<signed%> or %<unsigned%> invalid for %qs", name);
7684 else if (signed_p && unsigned_p)
7685 error ("%<signed%> and %<unsigned%> specified together for %qs", name);
7686 else if (longlong && TREE_CODE (type) != INTEGER_TYPE)
7687 error ("%<long long%> invalid for %qs", name);
7688 else if (long_p && TREE_CODE (type) == REAL_TYPE)
7689 error ("%<long%> invalid for %qs", name);
7690 else if (short_p && TREE_CODE (type) == REAL_TYPE)
7691 error ("%<short%> invalid for %qs", name);
7692 else if ((long_p || short_p) && TREE_CODE (type) != INTEGER_TYPE)
7693 error ("%<long%> or %<short%> invalid for %qs", name);
7694 else if ((long_p || short_p) && explicit_char)
7695 error ("%<long%> or %<short%> specified with char for %qs", name);
7696 else if (long_p && short_p)
7697 error ("%<long%> and %<short%> specified together for %qs", name);
7701 if (!explicit_int && !defaulted_int && !explicit_char && pedantic)
7703 pedwarn ("long, short, signed or unsigned used invalidly for %qs",
7705 if (flag_pedantic_errors)
7710 /* Discard the type modifiers if they are invalid. */
7721 /* Decide whether an integer type is signed or not.
7722 Optionally treat bitfields as signed by default. */
7726 It is implementation-defined whether a plain (neither
7727 explicitly signed or unsigned) char, short, int, or long
7728 bit-field is signed or unsigned.
7730 Naturally, we extend this to long long as well. Note that
7731 this does not include wchar_t. */
7732 || (bitfield && !flag_signed_bitfields
7734 /* A typedef for plain `int' without `signed' can be
7735 controlled just like plain `int', but a typedef for
7736 `signed int' cannot be so controlled. */
7738 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl))
7739 && TREE_CODE (type) == INTEGER_TYPE
7740 && !same_type_p (TYPE_MAIN_VARIANT (type), wchar_type_node)))
7743 type = long_long_unsigned_type_node;
7745 type = long_unsigned_type_node;
7747 type = short_unsigned_type_node;
7748 else if (type == char_type_node)
7749 type = unsigned_char_type_node;
7750 else if (typedef_decl)
7751 type = unsigned_type_for (type);
7753 type = unsigned_type_node;
7755 else if (signed_p && type == char_type_node)
7756 type = signed_char_type_node;
7758 type = long_long_integer_type_node;
7760 type = long_integer_type_node;
7762 type = short_integer_type_node;
7764 if (declspecs->specs[(int)ds_complex])
7766 if (TREE_CODE (type) != INTEGER_TYPE && TREE_CODE (type) != REAL_TYPE)
7767 error ("complex invalid for %qs", name);
7768 /* If we just have "complex", it is equivalent to
7769 "complex double", but if any modifiers at all are specified it is
7770 the complex form of TYPE. E.g, "complex short" is
7771 "complex short int". */
7773 else if (defaulted_int && ! longlong
7774 && ! (long_p || short_p || signed_p || unsigned_p))
7775 type = complex_double_type_node;
7776 else if (type == integer_type_node)
7777 type = complex_integer_type_node;
7778 else if (type == float_type_node)
7779 type = complex_float_type_node;
7780 else if (type == double_type_node)
7781 type = complex_double_type_node;
7782 else if (type == long_double_type_node)
7783 type = complex_long_double_type_node;
7785 type = build_complex_type (type);
7788 type_quals = TYPE_UNQUALIFIED;
7789 if (declspecs->specs[(int)ds_const])
7790 type_quals |= TYPE_QUAL_CONST;
7791 if (declspecs->specs[(int)ds_volatile])
7792 type_quals |= TYPE_QUAL_VOLATILE;
7793 if (declspecs->specs[(int)ds_restrict])
7794 type_quals |= TYPE_QUAL_RESTRICT;
7795 if (sfk == sfk_conversion && type_quals != TYPE_UNQUALIFIED)
7796 error ("qualifiers are not allowed on declaration of %<operator %T%>",
7799 if (TREE_CODE (type) == FUNCTION_TYPE
7800 && type_quals != TYPE_UNQUALIFIED)
7802 /* This was an error in C++98 (cv-qualifiers cannot be added to
7803 a function type), but DR 295 makes the code well-formed by
7804 dropping the extra qualifiers. */
7807 tree bad_type = build_qualified_type (type, type_quals);
7808 pedwarn ("ignoring %qV qualifiers added to function type %qT",
7811 type_quals = TYPE_UNQUALIFIED;
7813 type_quals |= cp_type_quals (type);
7814 type = cp_build_qualified_type_real
7815 (type, type_quals, ((typedef_decl && !DECL_ARTIFICIAL (typedef_decl)
7816 ? tf_ignore_bad_quals : 0) | tf_warning_or_error));
7817 /* We might have ignored or rejected some of the qualifiers. */
7818 type_quals = cp_type_quals (type);
7821 inlinep = !! declspecs->specs[(int)ds_inline];
7822 virtualp = !! declspecs->specs[(int)ds_virtual];
7823 explicitp = !! declspecs->specs[(int)ds_explicit];
7825 storage_class = declspecs->storage_class;
7826 if (storage_class == sc_static)
7827 staticp = 1 + (decl_context == FIELD);
7829 if (virtualp && staticp == 2)
7831 error ("member %qD cannot be declared both virtual and static", dname);
7832 storage_class = sc_none;
7835 friendp = !! declspecs->specs[(int)ds_friend];
7837 if (dependent_name && !friendp)
7839 error ("%<%T::%D%> is not a valid declarator", ctype, dependent_name);
7840 return error_mark_node;
7843 /* Issue errors about use of storage classes for parameters. */
7844 if (decl_context == PARM)
7846 if (declspecs->specs[(int)ds_typedef])
7848 error ("typedef declaration invalid in parameter declaration");
7849 return error_mark_node;
7851 else if (storage_class == sc_static
7852 || storage_class == sc_extern
7854 error ("storage class specifiers invalid in parameter declarations");
7857 /* Give error if `virtual' is used outside of class declaration. */
7859 && (current_class_name == NULL_TREE || decl_context != FIELD))
7861 error ("virtual outside class declaration");
7865 /* Static anonymous unions are dealt with here. */
7866 if (staticp && decl_context == TYPENAME
7868 && ANON_AGGR_TYPE_P (declspecs->type))
7869 decl_context = FIELD;
7871 /* Warn about storage classes that are invalid for certain
7872 kinds of declarations (parameters, typenames, etc.). */
7875 && storage_class != sc_extern
7876 && storage_class != sc_static)
7877 || declspecs->specs[(int)ds_typedef]))
7879 error ("multiple storage classes in declaration of %qs", name);
7882 if (decl_context != NORMAL
7883 && ((storage_class != sc_none
7884 && storage_class != sc_mutable)
7887 if ((decl_context == PARM || decl_context == CATCHPARM)
7888 && (storage_class == sc_register
7889 || storage_class == sc_auto))
7891 else if (declspecs->specs[(int)ds_typedef])
7893 else if (decl_context == FIELD
7894 /* C++ allows static class elements. */
7895 && storage_class == sc_static)
7896 /* C++ also allows inlines and signed and unsigned elements,
7897 but in those cases we don't come in here. */
7901 if (decl_context == FIELD)
7902 error ("storage class specified for %qs", name);
7905 if (decl_context == PARM || decl_context == CATCHPARM)
7906 error ("storage class specified for parameter %qs", name);
7908 error ("storage class specified for typename");
7910 if (storage_class == sc_register
7911 || storage_class == sc_auto
7912 || storage_class == sc_extern
7914 storage_class = sc_none;
7917 else if (storage_class == sc_extern && initialized
7920 if (toplevel_bindings_p ())
7922 /* It's common practice (and completely valid) to have a const
7923 be initialized and declared extern. */
7924 if (!(type_quals & TYPE_QUAL_CONST))
7925 warning (0, "%qs initialized and declared %<extern%>", name);
7928 error ("%qs has both %<extern%> and initializer", name);
7930 else if (storage_class == sc_extern && funcdef_flag
7931 && ! toplevel_bindings_p ())
7932 error ("nested function %qs declared %<extern%>", name);
7933 else if (toplevel_bindings_p ())
7935 if (storage_class == sc_auto)
7936 error ("top-level declaration of %qs specifies %<auto%>", name);
7939 && storage_class != sc_extern
7940 && storage_class != sc_static)
7942 error ("function-scope %qs implicitly auto and declared %<__thread%>",
7947 if (storage_class && friendp)
7948 error ("storage class specifiers invalid in friend function declarations");
7951 unqualified_id = NULL_TREE;
7954 unqualified_id = id_declarator->u.id.unqualified_name;
7955 switch (TREE_CODE (unqualified_id))
7959 = constructor_name (TREE_OPERAND (unqualified_id, 0));
7962 case IDENTIFIER_NODE:
7963 case TEMPLATE_ID_EXPR:
7971 /* Determine the type of the entity declared by recurring on the
7973 for (; declarator; declarator = declarator->declarator)
7975 const cp_declarator *inner_declarator;
7978 if (type == error_mark_node)
7979 return error_mark_node;
7981 attrs = declarator->attributes;
7987 if (declarator == NULL || declarator->kind == cdk_id)
7988 attr_flags |= (int) ATTR_FLAG_DECL_NEXT;
7989 if (declarator->kind == cdk_function)
7990 attr_flags |= (int) ATTR_FLAG_FUNCTION_NEXT;
7991 if (declarator->kind == cdk_array)
7992 attr_flags |= (int) ATTR_FLAG_ARRAY_NEXT;
7993 returned_attrs = decl_attributes (&type,
7994 chainon (returned_attrs, attrs),
7998 if (declarator->kind == cdk_id)
8001 inner_declarator = declarator->declarator;
8003 switch (declarator->kind)
8006 type = create_array_type_for_decl (dname, type,
8007 declarator->u.array.bounds);
8015 /* Declaring a function type.
8016 Make sure we have a valid type for the function to return. */
8018 if (type_quals != TYPE_UNQUALIFIED)
8020 if (SCALAR_TYPE_P (type) || VOID_TYPE_P (type))
8021 warning (OPT_Wreturn_type,
8022 "type qualifiers ignored on function return type");
8023 /* We now know that the TYPE_QUALS don't apply to the
8024 decl, but to its return type. */
8025 type_quals = TYPE_UNQUALIFIED;
8026 set_no_warning = true;
8029 /* Warn about some types functions can't return. */
8031 if (TREE_CODE (type) == FUNCTION_TYPE)
8033 error ("%qs declared as function returning a function", name);
8034 type = integer_type_node;
8036 if (TREE_CODE (type) == ARRAY_TYPE)
8038 error ("%qs declared as function returning an array", name);
8039 type = integer_type_node;
8042 /* Pick up type qualifiers which should be applied to `this'. */
8043 memfn_quals = declarator->u.function.qualifiers;
8045 /* Pick up the exception specifications. */
8046 raises = declarator->u.function.exception_specification;
8048 /* Say it's a definition only for the CALL_EXPR
8049 closest to the identifier. */
8050 funcdecl_p = inner_declarator && inner_declarator->kind == cdk_id;
8052 if (ctype == NULL_TREE
8053 && decl_context == FIELD
8055 && (friendp == 0 || dname == current_class_name))
8056 ctype = current_class_type;
8058 if (ctype && (sfk == sfk_constructor
8059 || sfk == sfk_destructor))
8061 /* We are within a class's scope. If our declarator name
8062 is the same as the class name, and we are defining
8063 a function, then it is a constructor/destructor, and
8064 therefore returns a void type. */
8066 /* ISO C++ 12.4/2. A destructor may not be declared
8067 const or volatile. A destructor may not be
8070 ISO C++ 12.1. A constructor may not be declared
8071 const or volatile. A constructor may not be
8072 virtual. A constructor may not be static. */
8074 error ((flags == DTOR_FLAG)
8075 ? "destructor cannot be static member function"
8076 : "constructor cannot be static member function");
8079 error ((flags == DTOR_FLAG)
8080 ? "destructors may not be cv-qualified"
8081 : "constructors may not be cv-qualified");
8082 memfn_quals = TYPE_UNQUALIFIED;
8085 if (decl_context == FIELD
8086 && !member_function_or_else (ctype,
8089 return error_mark_node;
8091 if (flags != DTOR_FLAG)
8093 /* It's a constructor. */
8098 pedwarn ("constructors cannot be declared virtual");
8101 if (decl_context == FIELD
8102 && sfk != sfk_constructor)
8103 return error_mark_node;
8105 if (decl_context == FIELD)
8111 error ("can't initialize friend function %qs", name);
8114 /* Cannot be both friend and virtual. */
8115 error ("virtual functions cannot be friends");
8118 if (decl_context == NORMAL)
8119 error ("friend declaration not in class definition");
8120 if (current_function_decl && funcdef_flag)
8121 error ("can't define friend function %qs in a local "
8126 arg_types = grokparms (declarator->u.function.parameters,
8129 if (inner_declarator
8130 && inner_declarator->kind == cdk_id
8131 && inner_declarator->u.id.sfk == sfk_destructor
8132 && arg_types != void_list_node)
8134 error ("destructors may not have parameters");
8135 arg_types = void_list_node;
8139 type = build_function_type (type, arg_types);
8146 /* Filter out pointers-to-references and references-to-references.
8147 We can get these if a TYPE_DECL is used. */
8149 if (TREE_CODE (type) == REFERENCE_TYPE)
8151 if (declarator->kind != cdk_reference)
8153 error ("cannot declare pointer to %q#T", type);
8154 type = TREE_TYPE (type);
8157 /* In C++0x, we allow reference to reference declarations
8158 that occur indirectly through typedefs [7.1.3/8 dcl.typedef]
8159 and template type arguments [14.3.1/4 temp.arg.type]. The
8160 check for direct reference to reference declarations, which
8161 are still forbidden, occurs below. Reasoning behind the change
8162 can be found in DR106, DR540, and the rvalue reference
8164 else if (cxx_dialect == cxx98)
8166 error ("cannot declare reference to %q#T", type);
8167 type = TREE_TYPE (type);
8170 else if (VOID_TYPE_P (type))
8172 if (declarator->kind == cdk_reference)
8173 error ("cannot declare reference to %q#T", type);
8174 else if (declarator->kind == cdk_ptrmem)
8175 error ("cannot declare pointer to %q#T member", type);
8178 /* We now know that the TYPE_QUALS don't apply to the decl,
8179 but to the target of the pointer. */
8180 type_quals = TYPE_UNQUALIFIED;
8182 if (declarator->kind == cdk_ptrmem
8183 && (TREE_CODE (type) == FUNCTION_TYPE
8184 || (memfn_quals && TREE_CODE (type) == METHOD_TYPE)))
8186 memfn_quals |= cp_type_quals (type);
8187 type = build_memfn_type (type,
8188 declarator->u.pointer.class_type,
8190 memfn_quals = TYPE_UNQUALIFIED;
8193 if (declarator->kind == cdk_reference)
8195 /* In C++0x, the type we are creating a reference to might be
8196 a typedef which is itself a reference type. In that case,
8197 we follow the reference collapsing rules in
8198 [7.1.3/8 dcl.typedef] to create the final reference type:
8200 "If a typedef TD names a type that is a reference to a type
8201 T, an attempt to create the type 'lvalue reference to cv TD'
8202 creates the type 'lvalue reference to T,' while an attempt
8203 to create the type "rvalue reference to cv TD' creates the
8206 if (!VOID_TYPE_P (type))
8207 type = cp_build_reference_type
8208 ((TREE_CODE (type) == REFERENCE_TYPE
8209 ? TREE_TYPE (type) : type),
8210 (declarator->u.reference.rvalue_ref
8211 && (TREE_CODE(type) != REFERENCE_TYPE
8212 || TYPE_REF_IS_RVALUE (type))));
8214 /* In C++0x, we need this check for direct reference to
8215 reference declarations, which are forbidden by
8216 [8.3.2/5 dcl.ref]. Reference to reference declarations
8217 are only allowed indirectly through typedefs and template
8218 type arguments. Example:
8220 void foo(int & &); // invalid ref-to-ref decl
8222 typedef int & int_ref;
8223 void foo(int_ref &); // valid ref-to-ref decl
8225 if (inner_declarator && inner_declarator->kind == cdk_reference)
8226 error ("cannot declare reference to %q#T, which is not "
8227 "a typedef or a template type argument", type);
8229 else if (TREE_CODE (type) == METHOD_TYPE)
8230 type = build_ptrmemfunc_type (build_pointer_type (type));
8231 else if (declarator->kind == cdk_ptrmem)
8233 gcc_assert (TREE_CODE (declarator->u.pointer.class_type)
8235 if (declarator->u.pointer.class_type == error_mark_node)
8236 /* We will already have complained. */
8237 type = error_mark_node;
8239 type = build_ptrmem_type (declarator->u.pointer.class_type,
8243 type = build_pointer_type (type);
8245 /* Process a list of type modifier keywords (such as
8246 const or volatile) that were given inside the `*' or `&'. */
8248 if (declarator->u.pointer.qualifiers)
8251 = cp_build_qualified_type (type,
8252 declarator->u.pointer.qualifiers);
8253 type_quals = cp_type_quals (type);
8266 if (unqualified_id && TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR
8267 && TREE_CODE (type) != FUNCTION_TYPE
8268 && TREE_CODE (type) != METHOD_TYPE)
8270 error ("template-id %qD used as a declarator",
8272 unqualified_id = dname;
8275 /* If TYPE is a FUNCTION_TYPE, but the function name was explicitly
8276 qualified with a class-name, turn it into a METHOD_TYPE, unless
8277 we know that the function is static. We take advantage of this
8278 opportunity to do other processing that pertains to entities
8279 explicitly declared to be class members. Note that if DECLARATOR
8280 is non-NULL, we know it is a cdk_id declarator; otherwise, we
8281 would not have exited the loop above. */
8283 && declarator->u.id.qualifying_scope
8284 && TYPE_P (declarator->u.id.qualifying_scope))
8288 ctype = declarator->u.id.qualifying_scope;
8289 ctype = TYPE_MAIN_VARIANT (ctype);
8291 while (t != NULL_TREE && CLASS_TYPE_P (t))
8293 /* You're supposed to have one `template <...>' for every
8294 template class, but you don't need one for a full
8295 specialization. For example:
8297 template <class T> struct S{};
8298 template <> struct S<int> { void f(); };
8299 void S<int>::f () {}
8301 is correct; there shouldn't be a `template <>' for the
8302 definition of `S<int>::f'. */
8303 if (CLASSTYPE_TEMPLATE_SPECIALIZATION (t)
8304 && !any_dependent_template_arguments_p (CLASSTYPE_TI_ARGS (t)))
8305 /* T is an explicit (not partial) specialization. All
8306 containing classes must therefore also be explicitly
8309 if ((CLASSTYPE_USE_TEMPLATE (t) || CLASSTYPE_IS_TEMPLATE (t))
8310 && PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (t)))
8311 template_count += 1;
8313 t = TYPE_MAIN_DECL (t);
8314 t = DECL_CONTEXT (t);
8317 if (ctype == current_class_type)
8321 pedwarn ("member functions are implicitly friends of their class");
8325 pedwarn ("extra qualification %<%T::%> on member %qs",
8328 else if (/* If the qualifying type is already complete, then we
8329 can skip the following checks. */
8330 !COMPLETE_TYPE_P (ctype)
8331 && (/* If the function is being defined, then
8332 qualifying type must certainly be complete. */
8334 /* A friend declaration of "T::f" is OK, even if
8335 "T" is a template parameter. But, if this
8336 function is not a friend, the qualifying type
8338 || (!friendp && !CLASS_TYPE_P (ctype))
8339 /* For a declaration, the type need not be
8340 complete, if either it is dependent (since there
8341 is no meaningful definition of complete in that
8342 case) or the qualifying class is currently being
8344 || !(dependent_type_p (ctype)
8345 || currently_open_class (ctype)))
8346 /* Check that the qualifying type is complete. */
8347 && !complete_type_or_else (ctype, NULL_TREE))
8348 return error_mark_node;
8349 else if (TREE_CODE (type) == FUNCTION_TYPE)
8351 tree sname = declarator->u.id.unqualified_name;
8353 if (current_class_type
8354 && (!friendp || funcdef_flag))
8357 ? "cannot define member function %<%T::%s%> within %<%T%>"
8358 : "cannot declare member function %<%T::%s%> within %<%T%>",
8359 ctype, name, current_class_type);
8360 return error_mark_node;
8363 if (TREE_CODE (sname) == IDENTIFIER_NODE
8364 && NEW_DELETE_OPNAME_P (sname))
8365 /* Overloaded operator new and operator delete
8366 are always static functions. */
8369 type = build_memfn_type (type, ctype, memfn_quals);
8371 else if (declspecs->specs[(int)ds_typedef]
8372 && current_class_type)
8374 error ("cannot declare member %<%T::%s%> within %qT",
8375 ctype, name, current_class_type);
8376 return error_mark_node;
8380 /* Now TYPE has the actual type. */
8385 *attrlist = chainon (returned_attrs, *attrlist);
8387 attrlist = &returned_attrs;
8390 /* Handle parameter packs. */
8391 if (parameter_pack_p)
8393 if (decl_context == PARM)
8394 /* Turn the type into a pack expansion.*/
8395 type = make_pack_expansion (type);
8397 error ("non-parameter %qs cannot be a parameter pack", name);
8400 /* Did array size calculations overflow? */
8402 if (TREE_CODE (type) == ARRAY_TYPE
8403 && COMPLETE_TYPE_P (type)
8404 && TREE_CODE (TYPE_SIZE_UNIT (type)) == INTEGER_CST
8405 && TREE_OVERFLOW (TYPE_SIZE_UNIT (type)))
8407 error ("size of array %qs is too large", name);
8408 /* If we proceed with the array type as it is, we'll eventually
8409 crash in tree_low_cst(). */
8410 type = error_mark_node;
8413 if ((decl_context == FIELD || decl_context == PARM)
8414 && !processing_template_decl
8415 && variably_modified_type_p (type, NULL_TREE))
8417 if (decl_context == FIELD)
8418 error ("data member may not have variably modified type %qT", type);
8420 error ("parameter may not have variably modified type %qT", type);
8421 type = error_mark_node;
8424 if (explicitp == 1 || (explicitp && friendp))
8426 /* [dcl.fct.spec] The explicit specifier shall only be used in
8427 declarations of constructors within a class definition. */
8428 error ("only declarations of constructors can be %<explicit%>");
8432 if (storage_class == sc_mutable)
8434 if (decl_context != FIELD || friendp)
8436 error ("non-member %qs cannot be declared %<mutable%>", name);
8437 storage_class = sc_none;
8439 else if (decl_context == TYPENAME || declspecs->specs[(int)ds_typedef])
8441 error ("non-object member %qs cannot be declared %<mutable%>", name);
8442 storage_class = sc_none;
8444 else if (TREE_CODE (type) == FUNCTION_TYPE
8445 || TREE_CODE (type) == METHOD_TYPE)
8447 error ("function %qs cannot be declared %<mutable%>", name);
8448 storage_class = sc_none;
8452 error ("static %qs cannot be declared %<mutable%>", name);
8453 storage_class = sc_none;
8455 else if (type_quals & TYPE_QUAL_CONST)
8457 error ("const %qs cannot be declared %<mutable%>", name);
8458 storage_class = sc_none;
8462 /* If this is declaring a typedef name, return a TYPE_DECL. */
8463 if (declspecs->specs[(int)ds_typedef] && decl_context != TYPENAME)
8467 /* Note that the grammar rejects storage classes
8468 in typenames, fields or parameters. */
8469 if (current_lang_name == lang_name_java)
8470 TYPE_FOR_JAVA (type) = 1;
8472 /* This declaration:
8474 typedef void f(int) const;
8476 declares a function type which is not a member of any
8477 particular class, but which is cv-qualified; for
8478 example "f S::*" declares a pointer to a const-qualified
8479 member function of S. We record the cv-qualification in the
8481 if (memfn_quals && TREE_CODE (type) == FUNCTION_TYPE)
8483 type = cp_build_qualified_type (type, memfn_quals);
8485 /* We have now dealt with these qualifiers. */
8486 memfn_quals = TYPE_UNQUALIFIED;
8489 if (decl_context == FIELD)
8490 decl = build_lang_decl (TYPE_DECL, unqualified_id, type);
8492 decl = build_decl (TYPE_DECL, unqualified_id, type);
8493 if (id_declarator && declarator->u.id.qualifying_scope)
8494 error ("%Jtypedef name may not be a nested-name-specifier", decl);
8496 if (decl_context != FIELD)
8498 if (!current_function_decl)
8499 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
8500 else if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (current_function_decl)
8501 || (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P
8502 (current_function_decl)))
8503 /* The TYPE_DECL is "abstract" because there will be
8504 clones of this constructor/destructor, and there will
8505 be copies of this TYPE_DECL generated in those
8507 DECL_ABSTRACT (decl) = 1;
8509 else if (constructor_name_p (unqualified_id, current_class_type))
8510 pedwarn ("ISO C++ forbids nested type %qD with same name "
8511 "as enclosing class",
8514 /* If the user declares "typedef struct {...} foo" then the
8515 struct will have an anonymous name. Fill that name in now.
8516 Nothing can refer to it, so nothing needs know about the name
8518 if (type != error_mark_node
8521 && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
8522 && TYPE_ANONYMOUS_P (type)
8523 /* Don't do this if there are attributes. */
8524 && (!attrlist || !*attrlist)
8525 && cp_type_quals (type) == TYPE_UNQUALIFIED)
8527 tree oldname = TYPE_NAME (type);
8530 /* Replace the anonymous name with the real name everywhere. */
8531 for (t = TYPE_MAIN_VARIANT (type); t; t = TYPE_NEXT_VARIANT (t))
8532 if (TYPE_NAME (t) == oldname)
8533 TYPE_NAME (t) = decl;
8535 if (TYPE_LANG_SPECIFIC (type))
8536 TYPE_WAS_ANONYMOUS (type) = 1;
8538 /* If this is a typedef within a template class, the nested
8539 type is a (non-primary) template. The name for the
8540 template needs updating as well. */
8541 if (TYPE_LANG_SPECIFIC (type) && CLASSTYPE_TEMPLATE_INFO (type))
8542 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type))
8543 = TYPE_IDENTIFIER (type);
8545 /* FIXME remangle member functions; member functions of a
8546 type with external linkage have external linkage. */
8550 || (typedef_decl && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl)))
8551 C_TYPEDEF_EXPLICITLY_SIGNED (decl) = 1;
8553 bad_specifiers (decl, "type", virtualp,
8554 memfn_quals != TYPE_UNQUALIFIED,
8555 inlinep, friendp, raises != NULL_TREE);
8560 /* Detect the case of an array type of unspecified size
8561 which came, as such, direct from a typedef name.
8562 We must copy the type, so that the array's domain can be
8563 individually set by the object's initializer. */
8565 if (type && typedef_type
8566 && TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type)
8567 && TYPE_MAIN_VARIANT (type) == TYPE_MAIN_VARIANT (typedef_type))
8568 type = build_cplus_array_type (TREE_TYPE (type), NULL_TREE);
8570 /* Detect where we're using a typedef of function type to declare a
8571 function. PARMS will not be set, so we must create it now. */
8573 if (type == typedef_type && TREE_CODE (type) == FUNCTION_TYPE)
8575 tree decls = NULL_TREE;
8578 for (args = TYPE_ARG_TYPES (type); args; args = TREE_CHAIN (args))
8580 tree decl = cp_build_parm_decl (NULL_TREE, TREE_VALUE (args));
8582 TREE_CHAIN (decl) = decls;
8586 parms = nreverse (decls);
8588 if (decl_context != TYPENAME)
8590 /* A cv-qualifier-seq shall only be part of the function type
8591 for a non-static member function. [8.3.5/4 dcl.fct] */
8592 if (cp_type_quals (type) != TYPE_UNQUALIFIED
8593 && (current_class_type == NULL_TREE || staticp) )
8596 ? G_("qualified function types cannot be used to "
8597 "declare static member functions")
8598 : G_("qualified function types cannot be used to "
8599 "declare free functions"));
8600 type = TYPE_MAIN_VARIANT (type);
8603 /* The qualifiers on the function type become the qualifiers on
8604 the non-static member function. */
8605 memfn_quals |= cp_type_quals (type);
8609 /* If this is a type name (such as, in a cast or sizeof),
8610 compute the type and return it now. */
8612 if (decl_context == TYPENAME)
8614 /* Note that the grammar rejects storage classes
8615 in typenames, fields or parameters. */
8616 if (type_quals != TYPE_UNQUALIFIED)
8617 type_quals = TYPE_UNQUALIFIED;
8619 /* Special case: "friend class foo" looks like a TYPENAME context. */
8622 if (type_quals != TYPE_UNQUALIFIED)
8624 error ("type qualifiers specified for friend class declaration");
8625 type_quals = TYPE_UNQUALIFIED;
8629 error ("%<inline%> specified for friend class declaration");
8635 /* Don't allow friend declaration without a class-key. */
8636 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
8637 pedwarn ("template parameters cannot be friends");
8638 else if (TREE_CODE (type) == TYPENAME_TYPE)
8639 pedwarn ("friend declaration requires class-key, "
8640 "i.e. %<friend class %T::%D%>",
8641 TYPE_CONTEXT (type), TYPENAME_TYPE_FULLNAME (type));
8643 pedwarn ("friend declaration requires class-key, "
8644 "i.e. %<friend %#T%>",
8648 /* Only try to do this stuff if we didn't already give up. */
8649 if (type != integer_type_node)
8651 /* A friendly class? */
8652 if (current_class_type)
8653 make_friend_class (current_class_type, TYPE_MAIN_VARIANT (type),
8656 error ("trying to make class %qT a friend of global scope",
8659 type = void_type_node;
8662 else if (memfn_quals)
8664 if (ctype == NULL_TREE)
8666 if (TREE_CODE (type) != METHOD_TYPE)
8667 error ("invalid qualifiers on non-member function type");
8669 ctype = TYPE_METHOD_BASETYPE (type);
8672 type = build_memfn_type (type, ctype, memfn_quals);
8677 else if (unqualified_id == NULL_TREE && decl_context != PARM
8678 && decl_context != CATCHPARM
8679 && TREE_CODE (type) != UNION_TYPE
8682 error ("abstract declarator %qT used as declaration", type);
8683 return error_mark_node;
8686 /* Only functions may be declared using an operator-function-id. */
8688 && IDENTIFIER_OPNAME_P (unqualified_id)
8689 && TREE_CODE (type) != FUNCTION_TYPE
8690 && TREE_CODE (type) != METHOD_TYPE)
8692 error ("declaration of %qD as non-function", unqualified_id);
8693 return error_mark_node;
8696 /* We don't check parameter types here because we can emit a better
8697 error message later. */
8698 if (decl_context != PARM)
8700 type = check_var_type (unqualified_id, type);
8701 if (type == error_mark_node)
8702 return error_mark_node;
8705 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
8706 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
8708 if (decl_context == PARM || decl_context == CATCHPARM)
8710 if (ctype || in_namespace)
8711 error ("cannot use %<::%> in parameter declaration");
8713 /* A parameter declared as an array of T is really a pointer to T.
8714 One declared as a function is really a pointer to a function.
8715 One declared as a member is really a pointer to member. */
8717 if (TREE_CODE (type) == ARRAY_TYPE)
8719 /* Transfer const-ness of array into that of type pointed to. */
8720 type = build_pointer_type (TREE_TYPE (type));
8721 type_quals = TYPE_UNQUALIFIED;
8723 else if (TREE_CODE (type) == FUNCTION_TYPE)
8724 type = build_pointer_type (type);
8730 if (decl_context == PARM)
8732 decl = cp_build_parm_decl (unqualified_id, type);
8734 bad_specifiers (decl, "parameter", virtualp,
8735 memfn_quals != TYPE_UNQUALIFIED,
8736 inlinep, friendp, raises != NULL_TREE);
8738 else if (decl_context == FIELD)
8740 /* The C99 flexible array extension. */
8741 if (!staticp && TREE_CODE (type) == ARRAY_TYPE
8742 && TYPE_DOMAIN (type) == NULL_TREE)
8744 tree itype = compute_array_index_type (dname, integer_zero_node);
8745 type = build_cplus_array_type (TREE_TYPE (type), itype);
8748 if (type == error_mark_node)
8750 /* Happens when declaring arrays of sizes which
8751 are error_mark_node, for example. */
8754 else if (in_namespace && !friendp)
8756 /* Something like struct S { int N::j; }; */
8757 error ("invalid use of %<::%>");
8758 return error_mark_node;
8760 else if (TREE_CODE (type) == FUNCTION_TYPE)
8763 tree function_context;
8767 if (ctype == NULL_TREE)
8768 ctype = current_class_type;
8770 if (ctype == NULL_TREE)
8772 error ("can't make %qD into a method -- not in a class",
8774 return error_mark_node;
8777 /* ``A union may [ ... ] not [ have ] virtual functions.''
8779 if (virtualp && TREE_CODE (ctype) == UNION_TYPE)
8781 error ("function %qD declared virtual inside a union",
8783 return error_mark_node;
8786 if (NEW_DELETE_OPNAME_P (unqualified_id))
8790 error ("%qD cannot be declared virtual, since it "
8796 else if (staticp < 2)
8797 type = build_memfn_type (type, ctype, memfn_quals);
8800 /* Check that the name used for a destructor makes sense. */
8801 if (sfk == sfk_destructor)
8805 gcc_assert (friendp);
8806 error ("expected qualified name in friend declaration "
8807 "for destructor %qD",
8808 id_declarator->u.id.unqualified_name);
8809 return error_mark_node;
8812 if (!same_type_p (TREE_OPERAND
8813 (id_declarator->u.id.unqualified_name, 0),
8816 error ("declaration of %qD as member of %qT",
8817 id_declarator->u.id.unqualified_name, ctype);
8818 return error_mark_node;
8822 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
8823 function_context = (ctype != NULL_TREE) ?
8824 decl_function_context (TYPE_MAIN_DECL (ctype)) : NULL_TREE;
8825 publicp = (! friendp || ! staticp)
8826 && function_context == NULL_TREE;
8827 decl = grokfndecl (ctype, type,
8828 TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
8829 ? unqualified_id : dname,
8832 virtualp, flags, memfn_quals, raises,
8833 friendp ? -1 : 0, friendp, publicp, inlinep,
8835 funcdef_flag, template_count, in_namespace, attrlist);
8836 if (decl == NULL_TREE)
8837 return error_mark_node;
8839 /* This clobbers the attrs stored in `decl' from `attrlist'. */
8840 /* The decl and setting of decl_attr is also turned off. */
8841 decl = build_decl_attribute_variant (decl, decl_attr);
8844 /* [class.conv.ctor]
8846 A constructor declared without the function-specifier
8847 explicit that can be called with a single parameter
8848 specifies a conversion from the type of its first
8849 parameter to the type of its class. Such a constructor
8850 is called a converting constructor. */
8852 DECL_NONCONVERTING_P (decl) = 1;
8853 else if (DECL_CONSTRUCTOR_P (decl))
8855 /* The constructor can be called with exactly one
8856 parameter if there is at least one parameter, and
8857 any subsequent parameters have default arguments.
8858 Ignore any compiler-added parms. */
8859 tree arg_types = FUNCTION_FIRST_USER_PARMTYPE (decl);
8861 if (arg_types == void_list_node
8863 && TREE_CHAIN (arg_types)
8864 && TREE_CHAIN (arg_types) != void_list_node
8865 && !TREE_PURPOSE (TREE_CHAIN (arg_types))))
8866 DECL_NONCONVERTING_P (decl) = 1;
8869 else if (TREE_CODE (type) == METHOD_TYPE)
8871 /* We only get here for friend declarations of
8872 members of other classes. */
8873 /* All method decls are public, so tell grokfndecl to set
8874 TREE_PUBLIC, also. */
8875 decl = grokfndecl (ctype, type,
8876 TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
8877 ? unqualified_id : dname,
8880 virtualp, flags, memfn_quals, raises,
8881 friendp ? -1 : 0, friendp, 1, 0, sfk,
8882 funcdef_flag, template_count, in_namespace,
8884 if (decl == NULL_TREE)
8885 return error_mark_node;
8887 else if (!staticp && !dependent_type_p (type)
8888 && !COMPLETE_TYPE_P (complete_type (type))
8889 && (TREE_CODE (type) != ARRAY_TYPE || initialized == 0))
8892 error ("field %qD has incomplete type", unqualified_id);
8894 error ("name %qT has incomplete type", type);
8896 /* If we're instantiating a template, tell them which
8897 instantiation made the field's type be incomplete. */
8898 if (current_class_type
8899 && TYPE_NAME (current_class_type)
8900 && IDENTIFIER_TEMPLATE (TYPE_IDENTIFIER (current_class_type))
8902 && declspecs->type == type)
8903 error (" in instantiation of template %qT",
8904 current_class_type);
8906 return error_mark_node;
8912 error ("%qE is neither function nor member function; "
8913 "cannot be declared friend", unqualified_id);
8921 /* Friends are treated specially. */
8922 if (ctype == current_class_type)
8923 ; /* We already issued a pedwarn. */
8924 else if (decl && DECL_NAME (decl))
8926 if (template_class_depth (current_class_type) == 0)
8928 decl = check_explicit_specialization
8929 (unqualified_id, decl, template_count,
8930 2 * funcdef_flag + 4);
8931 if (decl == error_mark_node)
8932 return error_mark_node;
8935 decl = do_friend (ctype, unqualified_id, decl,
8941 return error_mark_node;
8944 /* Structure field. It may not be a function, except for C++. */
8946 if (decl == NULL_TREE)
8952 /* An attempt is being made to initialize a non-static
8953 member. But, from [class.mem]:
8955 4 A member-declarator can contain a
8956 constant-initializer only if it declares a static
8957 member (_class.static_) of integral or enumeration
8958 type, see _class.static.data_.
8960 This used to be relatively common practice, but
8961 the rest of the compiler does not correctly
8962 handle the initialization unless the member is
8963 static so we make it static below. */
8964 pedwarn ("ISO C++ forbids initialization of member %qD",
8966 pedwarn ("making %qD static", unqualified_id);
8970 if (uses_template_parms (type))
8971 /* We'll check at instantiation time. */
8973 else if (check_static_variable_definition (unqualified_id,
8975 /* If we just return the declaration, crashes
8976 will sometimes occur. We therefore return
8977 void_type_node, as if this was a friend
8978 declaration, to cause callers to completely
8979 ignore this declaration. */
8980 return error_mark_node;
8985 /* C++ allows static class members. All other work
8986 for this is done by grokfield. */
8987 decl = build_lang_decl (VAR_DECL, unqualified_id, type);
8988 set_linkage_for_static_data_member (decl);
8989 /* Even if there is an in-class initialization, DECL
8990 is considered undefined until an out-of-class
8991 definition is provided. */
8992 DECL_EXTERNAL (decl) = 1;
8995 DECL_TLS_MODEL (decl) = decl_default_tls_model (decl);
8999 decl = build_decl (FIELD_DECL, unqualified_id, type);
9000 DECL_NONADDRESSABLE_P (decl) = bitfield;
9001 if (bitfield && !unqualified_id)
9002 TREE_NO_WARNING (decl) = 1;
9004 if (storage_class == sc_mutable)
9006 DECL_MUTABLE_P (decl) = 1;
9007 storage_class = sc_none;
9011 bad_specifiers (decl, "field", virtualp,
9012 memfn_quals != TYPE_UNQUALIFIED,
9013 inlinep, friendp, raises != NULL_TREE);
9016 else if (TREE_CODE (type) == FUNCTION_TYPE
9017 || TREE_CODE (type) == METHOD_TYPE)
9022 if (!unqualified_id)
9023 return error_mark_node;
9025 if (TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR)
9026 original_name = dname;
9028 original_name = unqualified_id;
9030 if (storage_class == sc_auto)
9031 error ("storage class %<auto%> invalid for function %qs", name);
9032 else if (storage_class == sc_register)
9033 error ("storage class %<register%> invalid for function %qs", name);
9035 error ("storage class %<__thread%> invalid for function %qs", name);
9037 /* Function declaration not at top level.
9038 Storage classes other than `extern' are not allowed
9039 and `extern' makes no difference. */
9040 if (! toplevel_bindings_p ()
9041 && (storage_class == sc_static
9042 || declspecs->specs[(int)ds_inline])
9045 if (storage_class == sc_static)
9046 pedwarn ("%<static%> specified invalid for function %qs "
9047 "declared out of global scope", name);
9049 pedwarn ("%<inline%> specifier invalid for function %qs "
9050 "declared out of global scope", name);
9053 if (ctype == NULL_TREE)
9057 error ("virtual non-class function %qs", name);
9061 else if (TREE_CODE (type) == FUNCTION_TYPE && staticp < 2
9062 && !NEW_DELETE_OPNAME_P (original_name))
9063 type = build_method_type_directly (ctype,
9065 TYPE_ARG_TYPES (type));
9067 /* Record presence of `static'. */
9068 publicp = (ctype != NULL_TREE
9069 || storage_class == sc_extern
9070 || storage_class != sc_static);
9072 decl = grokfndecl (ctype, type, original_name, parms, unqualified_id,
9073 virtualp, flags, memfn_quals, raises,
9075 publicp, inlinep, sfk, funcdef_flag,
9076 template_count, in_namespace, attrlist);
9077 if (decl == NULL_TREE)
9078 return error_mark_node;
9082 int invalid_static = 0;
9084 /* Don't allow a static member function in a class, and forbid
9085 declaring main to be static. */
9086 if (TREE_CODE (type) == METHOD_TYPE)
9088 pedwarn ("cannot declare member function %qD to have "
9089 "static linkage", decl);
9092 else if (current_function_decl)
9094 /* FIXME need arm citation */
9095 error ("cannot declare static function inside another function");
9102 storage_class = sc_none;
9108 /* It's a variable. */
9110 /* An uninitialized decl with `extern' is a reference. */
9111 decl = grokvardecl (type, unqualified_id,
9114 (type_quals & TYPE_QUAL_CONST) != 0,
9115 ctype ? ctype : in_namespace);
9116 bad_specifiers (decl, "variable", virtualp,
9117 memfn_quals != TYPE_UNQUALIFIED,
9118 inlinep, friendp, raises != NULL_TREE);
9122 DECL_CONTEXT (decl) = ctype;
9125 pedwarn ("%<static%> may not be used when defining "
9126 "(as opposed to declaring) a static data member");
9128 storage_class = sc_none;
9130 if (storage_class == sc_register && TREE_STATIC (decl))
9132 error ("static member %qD declared %<register%>", decl);
9133 storage_class = sc_none;
9135 if (storage_class == sc_extern && pedantic)
9137 pedwarn ("cannot explicitly declare member %q#D to have "
9140 storage_class = sc_none;
9145 /* Record `register' declaration for warnings on &
9146 and in case doing stupid register allocation. */
9148 if (storage_class == sc_register)
9149 DECL_REGISTER (decl) = 1;
9150 else if (storage_class == sc_extern)
9151 DECL_THIS_EXTERN (decl) = 1;
9152 else if (storage_class == sc_static)
9153 DECL_THIS_STATIC (decl) = 1;
9155 /* Record constancy and volatility on the DECL itself . There's
9156 no need to do this when processing a template; we'll do this
9157 for the instantiated declaration based on the type of DECL. */
9158 if (!processing_template_decl)
9159 cp_apply_type_quals_to_decl (type_quals, decl);
9162 TREE_NO_WARNING (decl) = 1;
9168 /* Subroutine of start_function. Ensure that each of the parameter
9169 types (as listed in PARMS) is complete, as is required for a
9170 function definition. */
9173 require_complete_types_for_parms (tree parms)
9175 for (; parms; parms = TREE_CHAIN (parms))
9177 if (dependent_type_p (TREE_TYPE (parms)))
9179 if (!VOID_TYPE_P (TREE_TYPE (parms))
9180 && complete_type_or_else (TREE_TYPE (parms), parms))
9182 relayout_decl (parms);
9183 DECL_ARG_TYPE (parms) = type_passed_as (TREE_TYPE (parms));
9186 /* grokparms or complete_type_or_else will have already issued
9188 TREE_TYPE (parms) = error_mark_node;
9192 /* Returns nonzero if T is a local variable. */
9195 local_variable_p (const_tree t)
9197 if ((TREE_CODE (t) == VAR_DECL
9198 /* A VAR_DECL with a context that is a _TYPE is a static data
9200 && !TYPE_P (CP_DECL_CONTEXT (t))
9201 /* Any other non-local variable must be at namespace scope. */
9202 && !DECL_NAMESPACE_SCOPE_P (t))
9203 || (TREE_CODE (t) == PARM_DECL))
9209 /* Like local_variable_p, but suitable for use as a tree-walking
9213 local_variable_p_walkfn (tree *tp, int *walk_subtrees,
9214 void *data ATTRIBUTE_UNUSED)
9216 if (local_variable_p (*tp) && !DECL_ARTIFICIAL (*tp))
9218 else if (TYPE_P (*tp))
9225 /* Check that ARG, which is a default-argument expression for a
9226 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
9227 something goes wrong. DECL may also be a _TYPE node, rather than a
9228 DECL, if there is no DECL available. */
9231 check_default_argument (tree decl, tree arg)
9236 if (TREE_CODE (arg) == DEFAULT_ARG)
9237 /* We get a DEFAULT_ARG when looking at an in-class declaration
9238 with a default argument. Ignore the argument for now; we'll
9239 deal with it after the class is complete. */
9248 decl_type = TREE_TYPE (decl);
9250 if (arg == error_mark_node
9251 || decl == error_mark_node
9252 || TREE_TYPE (arg) == error_mark_node
9253 || decl_type == error_mark_node)
9254 /* Something already went wrong. There's no need to check
9256 return error_mark_node;
9258 /* [dcl.fct.default]
9260 A default argument expression is implicitly converted to the
9262 if (!TREE_TYPE (arg)
9263 || !can_convert_arg (decl_type, TREE_TYPE (arg), arg, LOOKUP_NORMAL))
9266 error ("default argument for %q#D has type %qT",
9267 decl, TREE_TYPE (arg));
9269 error ("default argument for parameter of type %qT has type %qT",
9270 decl_type, TREE_TYPE (arg));
9272 return error_mark_node;
9275 /* [dcl.fct.default]
9277 Local variables shall not be used in default argument
9280 The keyword `this' shall not be used in a default argument of a
9282 var = cp_walk_tree_without_duplicates (&arg, local_variable_p_walkfn, NULL);
9285 error ("default argument %qE uses local variable %qD", arg, var);
9286 return error_mark_node;
9293 /* Decode the list of parameter types for a function type.
9294 Given the list of things declared inside the parens,
9295 return a list of types.
9297 If this parameter does not end with an ellipsis, we append
9300 *PARMS is set to the chain of PARM_DECLs created. */
9303 grokparms (cp_parameter_declarator *first_parm, tree *parms)
9305 tree result = NULL_TREE;
9306 tree decls = NULL_TREE;
9307 int ellipsis = !first_parm || first_parm->ellipsis_p;
9308 cp_parameter_declarator *parm;
9310 struct pointer_set_t *unique_decls = pointer_set_create ();
9312 for (parm = first_parm; parm != NULL; parm = parm->next)
9314 tree type = NULL_TREE;
9315 tree init = parm->default_argument;
9319 if (parm == no_parameters)
9322 attrs = parm->decl_specifiers.attributes;
9323 parm->decl_specifiers.attributes = NULL_TREE;
9324 decl = grokdeclarator (parm->declarator, &parm->decl_specifiers,
9325 PARM, init != NULL_TREE, &attrs);
9326 if (! decl || TREE_TYPE (decl) == error_mark_node)
9330 cplus_decl_attributes (&decl, attrs, 0);
9332 type = TREE_TYPE (decl);
9333 if (VOID_TYPE_P (type))
9335 if (same_type_p (type, void_type_node)
9336 && DECL_SELF_REFERENCE_P (type)
9337 && !DECL_NAME (decl) && !result && !parm->next && !ellipsis)
9338 /* this is a parmlist of `(void)', which is ok. */
9340 cxx_incomplete_type_error (decl, type);
9341 /* It's not a good idea to actually create parameters of
9342 type `void'; other parts of the compiler assume that a
9343 void type terminates the parameter list. */
9344 type = error_mark_node;
9345 TREE_TYPE (decl) = error_mark_node;
9348 if (type != error_mark_node
9349 && TYPE_FOR_JAVA (type)
9350 && IS_AGGR_TYPE (type))
9352 error ("parameter %qD has Java class type", decl);
9353 type = error_mark_node;
9354 TREE_TYPE (decl) = error_mark_node;
9358 if (type != error_mark_node)
9360 /* Top-level qualifiers on the parameters are
9361 ignored for function types. */
9362 type = cp_build_qualified_type (type, 0);
9363 if (TREE_CODE (type) == METHOD_TYPE)
9365 error ("parameter %qD invalidly declared method type", decl);
9366 type = build_pointer_type (type);
9367 TREE_TYPE (decl) = type;
9369 else if (abstract_virtuals_error (decl, type))
9370 any_error = 1; /* Seems like a good idea. */
9371 else if (POINTER_TYPE_P (type))
9373 /* [dcl.fct]/6, parameter types cannot contain pointers
9374 (references) to arrays of unknown bound. */
9375 tree t = TREE_TYPE (type);
9376 int ptr = TYPE_PTR_P (type);
9382 else if (TREE_CODE (t) != ARRAY_TYPE)
9384 else if (!TYPE_DOMAIN (t))
9388 if (TREE_CODE (t) == ARRAY_TYPE)
9389 error ("parameter %qD includes %s to array of unknown "
9391 decl, ptr ? "pointer" : "reference", t);
9396 else if (init && !processing_template_decl)
9397 init = check_default_argument (decl, init);
9400 if (TREE_CODE (decl) == PARM_DECL
9401 && FUNCTION_PARAMETER_PACK_P (decl)
9403 error ("parameter packs must be at the end of the parameter list");
9405 if (DECL_NAME (decl))
9407 if (pointer_set_contains (unique_decls, DECL_NAME (decl)))
9408 error ("multiple parameters named %qE", DECL_NAME (decl));
9410 pointer_set_insert (unique_decls, DECL_NAME (decl));
9413 TREE_CHAIN (decl) = decls;
9415 result = tree_cons (init, type, result);
9417 decls = nreverse (decls);
9418 result = nreverse (result);
9420 result = chainon (result, void_list_node);
9423 pointer_set_destroy (unique_decls);
9428 /* D is a constructor or overloaded `operator='.
9430 Let T be the class in which D is declared. Then, this function
9433 -1 if D's is an ill-formed constructor or copy assignment operator
9434 whose first parameter is of type `T'.
9435 0 if D is not a copy constructor or copy assignment
9437 1 if D is a copy constructor or copy assignment operator whose
9438 first parameter is a reference to const qualified T.
9439 2 if D is a copy constructor or copy assignment operator whose
9440 first parameter is a reference to non-const qualified T.
9442 This function can be used as a predicate. Positive values indicate
9443 a copy constructor and nonzero values indicate a copy assignment
9447 copy_fn_p (const_tree d)
9453 gcc_assert (DECL_FUNCTION_MEMBER_P (d));
9455 if (TREE_CODE (d) == TEMPLATE_DECL
9456 || (DECL_TEMPLATE_INFO (d)
9457 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d))))
9458 /* Instantiations of template member functions are never copy
9459 functions. Note that member functions of templated classes are
9460 represented as template functions internally, and we must
9461 accept those as copy functions. */
9464 args = FUNCTION_FIRST_USER_PARMTYPE (d);
9468 arg_type = TREE_VALUE (args);
9469 if (arg_type == error_mark_node)
9472 if (TYPE_MAIN_VARIANT (arg_type) == DECL_CONTEXT (d))
9474 /* Pass by value copy assignment operator. */
9477 else if (TREE_CODE (arg_type) == REFERENCE_TYPE
9478 && !TYPE_REF_IS_RVALUE (arg_type)
9479 && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type)) == DECL_CONTEXT (d))
9481 if (CP_TYPE_CONST_P (TREE_TYPE (arg_type)))
9487 args = TREE_CHAIN (args);
9489 if (args && args != void_list_node && !TREE_PURPOSE (args))
9490 /* There are more non-optional args. */
9496 /* D is a constructor or overloaded `operator='.
9498 Let T be the class in which D is declared. Then, this function
9499 returns true when D is a move constructor or move assignment
9500 operator, false otherwise. */
9503 move_fn_p (const_tree d)
9507 bool result = false;
9509 gcc_assert (DECL_FUNCTION_MEMBER_P (d));
9511 if (cxx_dialect == cxx98)
9512 /* There are no move constructors if we are in C++98 mode. */
9515 if (TREE_CODE (d) == TEMPLATE_DECL
9516 || (DECL_TEMPLATE_INFO (d)
9517 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d))))
9518 /* Instantiations of template member functions are never copy
9519 functions. Note that member functions of templated classes are
9520 represented as template functions internally, and we must
9521 accept those as copy functions. */
9524 args = FUNCTION_FIRST_USER_PARMTYPE (d);
9528 arg_type = TREE_VALUE (args);
9529 if (arg_type == error_mark_node)
9532 if (TREE_CODE (arg_type) == REFERENCE_TYPE
9533 && TYPE_REF_IS_RVALUE (arg_type)
9534 && same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (arg_type)),
9538 args = TREE_CHAIN (args);
9540 if (args && args != void_list_node && !TREE_PURPOSE (args))
9541 /* There are more non-optional args. */
9547 /* Remember any special properties of member function DECL. */
9549 void grok_special_member_properties (tree decl)
9553 if (!DECL_NONSTATIC_MEMBER_FUNCTION_P (decl))
9556 class_type = DECL_CONTEXT (decl);
9557 if (DECL_CONSTRUCTOR_P (decl))
9559 int ctor = copy_fn_p (decl);
9561 TYPE_HAS_CONSTRUCTOR (class_type) = 1;
9567 A non-template constructor for class X is a copy
9568 constructor if its first parameter is of type X&, const
9569 X&, volatile X& or const volatile X&, and either there
9570 are no other parameters or else all other parameters have
9571 default arguments. */
9572 TYPE_HAS_INIT_REF (class_type) = 1;
9574 TYPE_HAS_CONST_INIT_REF (class_type) = 1;
9576 else if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl)))
9577 TYPE_HAS_DEFAULT_CONSTRUCTOR (class_type) = 1;
9579 else if (DECL_OVERLOADED_OPERATOR_P (decl) == NOP_EXPR)
9583 A non-template assignment operator for class X is a copy
9584 assignment operator if its parameter is of type X, X&, const
9585 X&, volatile X& or const volatile X&. */
9587 int assop = copy_fn_p (decl);
9591 TYPE_HAS_ASSIGN_REF (class_type) = 1;
9593 TYPE_HAS_CONST_ASSIGN_REF (class_type) = 1;
9598 /* Check a constructor DECL has the correct form. Complains
9599 if the class has a constructor of the form X(X). */
9602 grok_ctor_properties (const_tree ctype, const_tree decl)
9604 int ctor_parm = copy_fn_p (decl);
9610 A declaration of a constructor for a class X is ill-formed if
9611 its first parameter is of type (optionally cv-qualified) X
9612 and either there are no other parameters or else all other
9613 parameters have default arguments.
9615 We *don't* complain about member template instantiations that
9616 have this form, though; they can occur as we try to decide
9617 what constructor to use during overload resolution. Since
9618 overload resolution will never prefer such a constructor to
9619 the non-template copy constructor (which is either explicitly
9620 or implicitly defined), there's no need to worry about their
9621 existence. Theoretically, they should never even be
9622 instantiated, but that's hard to forestall. */
9623 error ("invalid constructor; you probably meant %<%T (const %T&)%>",
9631 /* An operator with this code is unary, but can also be binary. */
9634 ambi_op_p (enum tree_code code)
9636 return (code == INDIRECT_REF
9637 || code == ADDR_EXPR
9638 || code == UNARY_PLUS_EXPR
9639 || code == NEGATE_EXPR
9640 || code == PREINCREMENT_EXPR
9641 || code == PREDECREMENT_EXPR);
9644 /* An operator with this name can only be unary. */
9647 unary_op_p (enum tree_code code)
9649 return (code == TRUTH_NOT_EXPR
9650 || code == BIT_NOT_EXPR
9651 || code == COMPONENT_REF
9652 || code == TYPE_EXPR);
9655 /* DECL is a declaration for an overloaded operator. If COMPLAIN is true,
9656 errors are issued for invalid declarations. */
9659 grok_op_properties (tree decl, bool complain)
9661 tree argtypes = TYPE_ARG_TYPES (TREE_TYPE (decl));
9663 int methodp = (TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE);
9664 tree name = DECL_NAME (decl);
9665 enum tree_code operator_code;
9670 /* Count the number of arguments and check for ellipsis. */
9671 for (argtype = argtypes, arity = 0;
9672 argtype && argtype != void_list_node;
9673 argtype = TREE_CHAIN (argtype))
9675 ellipsis_p = !argtype;
9677 class_type = DECL_CONTEXT (decl);
9678 if (class_type && !CLASS_TYPE_P (class_type))
9679 class_type = NULL_TREE;
9681 if (DECL_CONV_FN_P (decl))
9682 operator_code = TYPE_EXPR;
9686 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
9687 if (ansi_opname (CODE) == name) \
9689 operator_code = (CODE); \
9692 else if (ansi_assopname (CODE) == name) \
9694 operator_code = (CODE); \
9695 DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
9699 #include "operators.def"
9705 gcc_assert (operator_code != LAST_CPLUS_TREE_CODE);
9706 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
9709 switch (operator_code)
9712 TYPE_HAS_NEW_OPERATOR (class_type) = 1;
9716 TYPE_GETS_DELETE (class_type) |= 1;
9720 TYPE_HAS_ARRAY_NEW_OPERATOR (class_type) = 1;
9723 case VEC_DELETE_EXPR:
9724 TYPE_GETS_DELETE (class_type) |= 2;
9731 /* [basic.std.dynamic.allocation]/1:
9733 A program is ill-formed if an allocation function is declared
9734 in a namespace scope other than global scope or declared static
9737 The same also holds true for deallocation functions. */
9738 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR
9739 || operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
9741 if (DECL_NAMESPACE_SCOPE_P (decl))
9743 if (CP_DECL_CONTEXT (decl) != global_namespace)
9745 error ("%qD may not be declared within a namespace", decl);
9748 else if (!TREE_PUBLIC (decl))
9750 error ("%qD may not be declared as static", decl);
9756 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR)
9757 TREE_TYPE (decl) = coerce_new_type (TREE_TYPE (decl));
9758 else if (operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
9759 TREE_TYPE (decl) = coerce_delete_type (TREE_TYPE (decl));
9762 /* An operator function must either be a non-static member function
9763 or have at least one parameter of a class, a reference to a class,
9764 an enumeration, or a reference to an enumeration. 13.4.0.6 */
9765 if (! methodp || DECL_STATIC_FUNCTION_P (decl))
9767 if (operator_code == TYPE_EXPR
9768 || operator_code == CALL_EXPR
9769 || operator_code == COMPONENT_REF
9770 || operator_code == ARRAY_REF
9771 || operator_code == NOP_EXPR)
9773 error ("%qD must be a nonstatic member function", decl);
9780 if (DECL_STATIC_FUNCTION_P (decl))
9782 error ("%qD must be either a non-static member "
9783 "function or a non-member function", decl);
9787 for (p = argtypes; p && p != void_list_node; p = TREE_CHAIN (p))
9789 tree arg = non_reference (TREE_VALUE (p));
9790 if (arg == error_mark_node)
9793 /* IS_AGGR_TYPE, rather than CLASS_TYPE_P, is used
9794 because these checks are performed even on
9795 template functions. */
9796 if (IS_AGGR_TYPE (arg) || TREE_CODE (arg) == ENUMERAL_TYPE)
9800 if (!p || p == void_list_node)
9803 error ("%qD must have an argument of class or "
9804 "enumerated type", decl);
9810 /* There are no restrictions on the arguments to an overloaded
9812 if (operator_code == CALL_EXPR)
9815 /* Warn about conversion operators that will never be used. */
9816 if (IDENTIFIER_TYPENAME_P (name)
9817 && ! DECL_TEMPLATE_INFO (decl)
9819 /* Warn only declaring the function; there is no need to
9820 warn again about out-of-class definitions. */
9821 && class_type == current_class_type)
9823 tree t = TREE_TYPE (name);
9824 int ref = (TREE_CODE (t) == REFERENCE_TYPE);
9825 const char *what = 0;
9828 t = TYPE_MAIN_VARIANT (TREE_TYPE (t));
9830 if (TREE_CODE (t) == VOID_TYPE)
9832 else if (class_type)
9834 if (t == class_type)
9835 what = "the same type";
9836 /* Don't force t to be complete here. */
9837 else if (IS_AGGR_TYPE (t)
9838 && COMPLETE_TYPE_P (t)
9839 && DERIVED_FROM_P (t, class_type))
9840 what = "a base class";
9844 warning (OPT_Wconversion, "conversion to %s%s will never use a type "
9845 "conversion operator",
9846 ref ? "a reference to " : "", what);
9849 if (operator_code == COND_EXPR)
9852 error ("ISO C++ prohibits overloading operator ?:");
9855 else if (ellipsis_p)
9857 error ("%qD must not have variable number of arguments", decl);
9860 else if (ambi_op_p (operator_code))
9863 /* We pick the one-argument operator codes by default, so
9864 we don't have to change anything. */
9866 else if (arity == 2)
9868 /* If we thought this was a unary operator, we now know
9869 it to be a binary operator. */
9870 switch (operator_code)
9873 operator_code = MULT_EXPR;
9877 operator_code = BIT_AND_EXPR;
9880 case UNARY_PLUS_EXPR:
9881 operator_code = PLUS_EXPR;
9885 operator_code = MINUS_EXPR;
9888 case PREINCREMENT_EXPR:
9889 operator_code = POSTINCREMENT_EXPR;
9892 case PREDECREMENT_EXPR:
9893 operator_code = POSTDECREMENT_EXPR;
9900 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
9902 if ((operator_code == POSTINCREMENT_EXPR
9903 || operator_code == POSTDECREMENT_EXPR)
9904 && ! processing_template_decl
9905 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes)), integer_type_node))
9908 error ("postfix %qD must take %<int%> as its argument",
9911 error ("postfix %qD must take %<int%> as its second "
9919 error ("%qD must take either zero or one argument", decl);
9921 error ("%qD must take either one or two arguments", decl);
9925 /* More Effective C++ rule 6. */
9927 && (operator_code == POSTINCREMENT_EXPR
9928 || operator_code == POSTDECREMENT_EXPR
9929 || operator_code == PREINCREMENT_EXPR
9930 || operator_code == PREDECREMENT_EXPR))
9932 tree arg = TREE_VALUE (argtypes);
9933 tree ret = TREE_TYPE (TREE_TYPE (decl));
9934 if (methodp || TREE_CODE (arg) == REFERENCE_TYPE)
9935 arg = TREE_TYPE (arg);
9936 arg = TYPE_MAIN_VARIANT (arg);
9937 if (operator_code == PREINCREMENT_EXPR
9938 || operator_code == PREDECREMENT_EXPR)
9940 if (TREE_CODE (ret) != REFERENCE_TYPE
9941 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret)),
9943 warning (OPT_Weffc__, "prefix %qD should return %qT", decl,
9944 build_reference_type (arg));
9948 if (!same_type_p (TYPE_MAIN_VARIANT (ret), arg))
9949 warning (OPT_Weffc__, "postfix %qD should return %qT", decl, arg);
9953 else if (unary_op_p (operator_code))
9958 error ("%qD must take %<void%>", decl);
9960 error ("%qD must take exactly one argument", decl);
9964 else /* if (binary_op_p (operator_code)) */
9969 error ("%qD must take exactly one argument", decl);
9971 error ("%qD must take exactly two arguments", decl);
9975 /* More Effective C++ rule 7. */
9977 && (operator_code == TRUTH_ANDIF_EXPR
9978 || operator_code == TRUTH_ORIF_EXPR
9979 || operator_code == COMPOUND_EXPR))
9980 warning (OPT_Weffc__, "user-defined %qD always evaluates both arguments",
9984 /* Effective C++ rule 23. */
9987 && !DECL_ASSIGNMENT_OPERATOR_P (decl)
9988 && (operator_code == PLUS_EXPR
9989 || operator_code == MINUS_EXPR
9990 || operator_code == TRUNC_DIV_EXPR
9991 || operator_code == MULT_EXPR
9992 || operator_code == TRUNC_MOD_EXPR)
9993 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl))) == REFERENCE_TYPE)
9994 warning (OPT_Weffc__, "%qD should return by value", decl);
9997 for (; argtypes && argtypes != void_list_node;
9998 argtypes = TREE_CHAIN (argtypes))
9999 if (TREE_PURPOSE (argtypes))
10001 TREE_PURPOSE (argtypes) = NULL_TREE;
10002 if (operator_code == POSTINCREMENT_EXPR
10003 || operator_code == POSTDECREMENT_EXPR)
10006 pedwarn ("%qD cannot have default arguments", decl);
10010 error ("%qD cannot have default arguments", decl);
10018 /* Return a string giving the keyword associate with CODE. */
10020 static const char *
10021 tag_name (enum tag_types code)
10033 case typename_type:
10036 gcc_unreachable ();
10040 /* Name lookup in an elaborated-type-specifier (after the keyword
10041 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
10042 elaborated-type-specifier is invalid, issue a diagnostic and return
10043 error_mark_node; otherwise, return the *_TYPE to which it referred.
10044 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
10047 check_elaborated_type_specifier (enum tag_types tag_code,
10049 bool allow_template_p)
10055 struct S { struct S *p; };
10057 name lookup will find the TYPE_DECL for the implicit "S::S"
10058 typedef. Adjust for that here. */
10059 if (DECL_SELF_REFERENCE_P (decl))
10060 decl = TYPE_NAME (TREE_TYPE (decl));
10062 type = TREE_TYPE (decl);
10064 /* Check TEMPLATE_TYPE_PARM first because DECL_IMPLICIT_TYPEDEF_P
10065 is false for this case as well. */
10066 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
10068 error ("using template type parameter %qT after %qs",
10069 type, tag_name (tag_code));
10070 return error_mark_node;
10074 If the identifier resolves to a typedef-name or a template
10075 type-parameter, the elaborated-type-specifier is ill-formed.
10077 In other words, the only legitimate declaration to use in the
10078 elaborated type specifier is the implicit typedef created when
10079 the type is declared. */
10080 else if (!DECL_IMPLICIT_TYPEDEF_P (decl)
10081 && tag_code != typename_type)
10083 error ("using typedef-name %qD after %qs", decl, tag_name (tag_code));
10084 error ("%q+D has a previous declaration here", decl);
10085 return error_mark_node;
10087 else if (TREE_CODE (type) != RECORD_TYPE
10088 && TREE_CODE (type) != UNION_TYPE
10089 && tag_code != enum_type
10090 && tag_code != typename_type)
10092 error ("%qT referred to as %qs", type, tag_name (tag_code));
10093 error ("%q+T has a previous declaration here", type);
10094 return error_mark_node;
10096 else if (TREE_CODE (type) != ENUMERAL_TYPE
10097 && tag_code == enum_type)
10099 error ("%qT referred to as enum", type);
10100 error ("%q+T has a previous declaration here", type);
10101 return error_mark_node;
10103 else if (!allow_template_p
10104 && TREE_CODE (type) == RECORD_TYPE
10105 && CLASSTYPE_IS_TEMPLATE (type))
10107 /* If a class template appears as elaborated type specifier
10108 without a template header such as:
10110 template <class T> class C {};
10111 void f(class C); // No template header here
10113 then the required template argument is missing. */
10114 error ("template argument required for %<%s %T%>",
10115 tag_name (tag_code),
10116 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type)));
10117 return error_mark_node;
10123 /* Lookup NAME in elaborate type specifier in scope according to
10124 SCOPE and issue diagnostics if necessary.
10125 Return *_TYPE node upon success, NULL_TREE when the NAME is not
10126 found, and ERROR_MARK_NODE for type error. */
10129 lookup_and_check_tag (enum tag_types tag_code, tree name,
10130 tag_scope scope, bool template_header_p)
10134 if (scope == ts_global)
10136 /* First try ordinary name lookup, ignoring hidden class name
10137 injected via friend declaration. */
10138 decl = lookup_name_prefer_type (name, 2);
10139 /* If that fails, the name will be placed in the smallest
10140 non-class, non-function-prototype scope according to 3.3.1/5.
10141 We may already have a hidden name declared as friend in this
10142 scope. So lookup again but not ignoring hidden names.
10143 If we find one, that name will be made visible rather than
10144 creating a new tag. */
10146 decl = lookup_type_scope (name, ts_within_enclosing_non_class);
10149 decl = lookup_type_scope (name, scope);
10151 if (decl && DECL_CLASS_TEMPLATE_P (decl))
10152 decl = DECL_TEMPLATE_RESULT (decl);
10154 if (decl && TREE_CODE (decl) == TYPE_DECL)
10156 /* Look for invalid nested type:
10160 if (scope == ts_current && DECL_SELF_REFERENCE_P (decl))
10162 error ("%qD has the same name as the class in which it is "
10165 return error_mark_node;
10168 /* Two cases we need to consider when deciding if a class
10169 template is allowed as an elaborated type specifier:
10170 1. It is a self reference to its own class.
10171 2. It comes with a template header.
10175 template <class T> class C {
10176 class C *c1; // DECL_SELF_REFERENCE_P is true
10179 template <class U> class C; // template_header_p is true
10180 template <class T> class C<T>::D {
10181 class C *c2; // DECL_SELF_REFERENCE_P is true
10184 t = check_elaborated_type_specifier (tag_code,
10187 | DECL_SELF_REFERENCE_P (decl));
10190 else if (decl && TREE_CODE (decl) == TREE_LIST)
10192 error ("reference to %qD is ambiguous", name);
10193 print_candidates (decl);
10194 return error_mark_node;
10200 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
10201 Define the tag as a forward-reference if it is not defined.
10203 If a declaration is given, process it here, and report an error if
10204 multiple declarations are not identical.
10206 SCOPE is TS_CURRENT when this is also a definition. Only look in
10207 the current frame for the name (since C++ allows new names in any
10208 scope.) It is TS_WITHIN_ENCLOSING_NON_CLASS if this is a friend
10209 declaration. Only look beginning from the current scope outward up
10210 till the nearest non-class scope. Otherwise it is TS_GLOBAL.
10212 TEMPLATE_HEADER_P is true when this declaration is preceded by
10213 a set of template parameters. */
10216 xref_tag (enum tag_types tag_code, tree name,
10217 tag_scope scope, bool template_header_p)
10219 enum tree_code code;
10221 tree context = NULL_TREE;
10223 timevar_push (TV_NAME_LOOKUP);
10225 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
10231 code = RECORD_TYPE;
10237 code = ENUMERAL_TYPE;
10240 gcc_unreachable ();
10243 /* In case of anonymous name, xref_tag is only called to
10244 make type node and push name. Name lookup is not required. */
10245 if (ANON_AGGRNAME_P (name))
10248 t = lookup_and_check_tag (tag_code, name,
10249 scope, template_header_p);
10251 if (t == error_mark_node)
10252 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
10254 if (scope != ts_current && t && current_class_type
10255 && template_class_depth (current_class_type)
10256 && template_header_p)
10258 /* Since SCOPE is not TS_CURRENT, we are not looking at a
10259 definition of this tag. Since, in addition, we are currently
10260 processing a (member) template declaration of a template
10261 class, we must be very careful; consider:
10268 { template <class V>
10269 friend struct S1; };
10271 Here, the S2::S1 declaration should not be confused with the
10272 outer declaration. In particular, the inner version should
10273 have a template parameter of level 2, not level 1. This
10274 would be particularly important if the member declaration
10277 template <class V = U> friend struct S1;
10279 say, when we should tsubst into `U' when instantiating
10280 S2. On the other hand, when presented with:
10290 we must find the inner binding eventually. We
10291 accomplish this by making sure that the new type we
10292 create to represent this declaration has the right
10294 context = TYPE_CONTEXT (t);
10300 /* If no such tag is yet defined, create a forward-reference node
10301 and record it as the "definition".
10302 When a real declaration of this type is found,
10303 the forward-reference will be altered into a real type. */
10304 if (code == ENUMERAL_TYPE)
10306 error ("use of enum %q#D without previous declaration", name);
10307 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
10311 t = make_aggr_type (code);
10312 TYPE_CONTEXT (t) = context;
10313 t = pushtag (name, t, scope);
10318 if (template_header_p && IS_AGGR_TYPE (t))
10320 if (!redeclare_class_template (t, current_template_parms))
10321 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
10323 else if (!processing_template_decl
10324 && CLASS_TYPE_P (t)
10325 && CLASSTYPE_IS_TEMPLATE (t))
10327 error ("redeclaration of %qT as a non-template", t);
10328 error ("previous declaration %q+D", t);
10329 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
10332 /* Make injected friend class visible. */
10333 if (scope != ts_within_enclosing_non_class
10334 && hidden_name_p (TYPE_NAME (t)))
10336 DECL_ANTICIPATED (TYPE_NAME (t)) = 0;
10337 DECL_FRIEND_P (TYPE_NAME (t)) = 0;
10339 if (TYPE_TEMPLATE_INFO (t))
10341 DECL_ANTICIPATED (TYPE_TI_TEMPLATE (t)) = 0;
10342 DECL_FRIEND_P (TYPE_TI_TEMPLATE (t)) = 0;
10347 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, t);
10351 xref_tag_from_type (tree old, tree id, tag_scope scope)
10353 enum tag_types tag_kind;
10355 if (TREE_CODE (old) == RECORD_TYPE)
10356 tag_kind = (CLASSTYPE_DECLARED_CLASS (old) ? class_type : record_type);
10358 tag_kind = union_type;
10360 if (id == NULL_TREE)
10361 id = TYPE_IDENTIFIER (old);
10363 return xref_tag (tag_kind, id, scope, false);
10366 /* Create the binfo hierarchy for REF with (possibly NULL) base list
10367 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
10368 access_* node, and the TREE_VALUE is the type of the base-class.
10369 Non-NULL TREE_TYPE indicates virtual inheritance.
10371 Returns true if the binfo hierarchy was successfully created,
10372 false if an error was detected. */
10375 xref_basetypes (tree ref, tree base_list)
10378 tree binfo, base_binfo;
10379 unsigned max_vbases = 0; /* Maximum direct & indirect virtual bases. */
10380 unsigned max_bases = 0; /* Maximum direct bases. */
10382 tree default_access;
10383 tree igo_prev; /* Track Inheritance Graph Order. */
10385 if (ref == error_mark_node)
10388 /* The base of a derived class is private by default, all others are
10390 default_access = (TREE_CODE (ref) == RECORD_TYPE
10391 && CLASSTYPE_DECLARED_CLASS (ref)
10392 ? access_private_node : access_public_node);
10394 /* First, make sure that any templates in base-classes are
10395 instantiated. This ensures that if we call ourselves recursively
10396 we do not get confused about which classes are marked and which
10398 basep = &base_list;
10401 tree basetype = TREE_VALUE (*basep);
10403 if (!(processing_template_decl && uses_template_parms (basetype))
10404 && !complete_type_or_else (basetype, NULL))
10405 /* An incomplete type. Remove it from the list. */
10406 *basep = TREE_CHAIN (*basep);
10410 if (TREE_TYPE (*basep))
10412 if (CLASS_TYPE_P (basetype))
10413 max_vbases += VEC_length (tree, CLASSTYPE_VBASECLASSES (basetype));
10414 basep = &TREE_CHAIN (*basep);
10418 TYPE_MARKED_P (ref) = 1;
10420 /* The binfo slot should be empty, unless this is an (ill-formed)
10422 gcc_assert (!TYPE_BINFO (ref) || TYPE_SIZE (ref));
10423 gcc_assert (TYPE_MAIN_VARIANT (ref) == ref);
10425 binfo = make_tree_binfo (max_bases);
10427 TYPE_BINFO (ref) = binfo;
10428 BINFO_OFFSET (binfo) = size_zero_node;
10429 BINFO_TYPE (binfo) = ref;
10433 BINFO_BASE_ACCESSES (binfo) = VEC_alloc (tree, gc, max_bases);
10434 /* An aggregate cannot have baseclasses. */
10435 CLASSTYPE_NON_AGGREGATE (ref) = 1;
10437 if (TREE_CODE (ref) == UNION_TYPE)
10439 error ("derived union %qT invalid", ref);
10446 if (TYPE_FOR_JAVA (ref))
10448 error ("Java class %qT cannot have multiple bases", ref);
10455 CLASSTYPE_VBASECLASSES (ref) = VEC_alloc (tree, gc, max_vbases);
10457 if (TYPE_FOR_JAVA (ref))
10459 error ("Java class %qT cannot have virtual bases", ref);
10464 for (igo_prev = binfo; base_list; base_list = TREE_CHAIN (base_list))
10466 tree access = TREE_PURPOSE (base_list);
10467 int via_virtual = TREE_TYPE (base_list) != NULL_TREE;
10468 tree basetype = TREE_VALUE (base_list);
10470 if (access == access_default_node)
10471 access = default_access;
10473 if (PACK_EXPANSION_P (basetype))
10474 basetype = PACK_EXPANSION_PATTERN (basetype);
10475 if (TREE_CODE (basetype) == TYPE_DECL)
10476 basetype = TREE_TYPE (basetype);
10477 if (TREE_CODE (basetype) != RECORD_TYPE
10478 && TREE_CODE (basetype) != TYPENAME_TYPE
10479 && TREE_CODE (basetype) != TEMPLATE_TYPE_PARM
10480 && TREE_CODE (basetype) != BOUND_TEMPLATE_TEMPLATE_PARM)
10482 error ("base type %qT fails to be a struct or class type",
10487 if (TYPE_FOR_JAVA (basetype) && (current_lang_depth () == 0))
10488 TYPE_FOR_JAVA (ref) = 1;
10490 base_binfo = NULL_TREE;
10491 if (CLASS_TYPE_P (basetype) && !dependent_type_p (basetype))
10493 base_binfo = TYPE_BINFO (basetype);
10494 /* The original basetype could have been a typedef'd type. */
10495 basetype = BINFO_TYPE (base_binfo);
10497 /* Inherit flags from the base. */
10498 TYPE_HAS_NEW_OPERATOR (ref)
10499 |= TYPE_HAS_NEW_OPERATOR (basetype);
10500 TYPE_HAS_ARRAY_NEW_OPERATOR (ref)
10501 |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype);
10502 TYPE_GETS_DELETE (ref) |= TYPE_GETS_DELETE (basetype);
10503 TYPE_HAS_CONVERSION (ref) |= TYPE_HAS_CONVERSION (basetype);
10504 CLASSTYPE_DIAMOND_SHAPED_P (ref)
10505 |= CLASSTYPE_DIAMOND_SHAPED_P (basetype);
10506 CLASSTYPE_REPEATED_BASE_P (ref)
10507 |= CLASSTYPE_REPEATED_BASE_P (basetype);
10510 /* We must do this test after we've seen through a typedef
10512 if (TYPE_MARKED_P (basetype))
10514 if (basetype == ref)
10515 error ("recursive type %qT undefined", basetype);
10517 error ("duplicate base type %qT invalid", basetype);
10521 if (PACK_EXPANSION_P (TREE_VALUE (base_list)))
10522 /* Regenerate the pack expansion for the bases. */
10523 basetype = make_pack_expansion (basetype);
10525 TYPE_MARKED_P (basetype) = 1;
10527 base_binfo = copy_binfo (base_binfo, basetype, ref,
10528 &igo_prev, via_virtual);
10529 if (!BINFO_INHERITANCE_CHAIN (base_binfo))
10530 BINFO_INHERITANCE_CHAIN (base_binfo) = binfo;
10532 BINFO_BASE_APPEND (binfo, base_binfo);
10533 BINFO_BASE_ACCESS_APPEND (binfo, access);
10536 if (VEC_space (tree, CLASSTYPE_VBASECLASSES (ref), 1))
10537 /* If we have space in the vbase vector, we must have shared at
10538 least one of them, and are therefore diamond shaped. */
10539 CLASSTYPE_DIAMOND_SHAPED_P (ref) = 1;
10541 /* Unmark all the types. */
10542 for (i = 0; BINFO_BASE_ITERATE (binfo, i, base_binfo); i++)
10543 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
10544 TYPE_MARKED_P (ref) = 0;
10546 /* Now see if we have a repeated base type. */
10547 if (!CLASSTYPE_REPEATED_BASE_P (ref))
10549 for (base_binfo = binfo; base_binfo;
10550 base_binfo = TREE_CHAIN (base_binfo))
10552 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
10554 CLASSTYPE_REPEATED_BASE_P (ref) = 1;
10557 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 1;
10559 for (base_binfo = binfo; base_binfo;
10560 base_binfo = TREE_CHAIN (base_binfo))
10561 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
10562 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
10571 /* Begin compiling the definition of an enumeration type.
10573 Returns the type object, as yet incomplete.
10574 Also records info about it so that build_enumerator
10575 may be used to declare the individual values as they are read. */
10578 start_enum (tree name)
10582 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
10584 /* If this is the real definition for a previous forward reference,
10585 fill in the contents in the same object that used to be the
10586 forward reference. */
10588 enumtype = lookup_and_check_tag (enum_type, name,
10589 /*tag_scope=*/ts_current,
10590 /*template_header_p=*/false);
10592 if (enumtype != NULL_TREE && TREE_CODE (enumtype) == ENUMERAL_TYPE)
10594 error ("multiple definition of %q#T", enumtype);
10595 error ("%Jprevious definition here", TYPE_MAIN_DECL (enumtype));
10596 /* Clear out TYPE_VALUES, and start again. */
10597 TYPE_VALUES (enumtype) = NULL_TREE;
10601 /* In case of error, make a dummy enum to allow parsing to
10603 if (enumtype == error_mark_node)
10604 name = make_anon_name ();
10606 enumtype = make_node (ENUMERAL_TYPE);
10607 enumtype = pushtag (name, enumtype, /*tag_scope=*/ts_current);
10613 /* After processing and defining all the values of an enumeration type,
10614 install their decls in the enumeration type and finish it off.
10615 ENUMTYPE is the type object and VALUES a list of name-value pairs. */
10618 finish_enum (tree enumtype)
10627 bool use_short_enum;
10631 integer_type_kind itk;
10632 tree underlying_type = NULL_TREE;
10634 /* We built up the VALUES in reverse order. */
10635 TYPE_VALUES (enumtype) = nreverse (TYPE_VALUES (enumtype));
10637 /* For an enum defined in a template, just set the type of the values;
10638 all further processing is postponed until the template is
10639 instantiated. We need to set the type so that tsubst of a CONST_DECL
10641 if (processing_template_decl)
10643 for (values = TYPE_VALUES (enumtype);
10645 values = TREE_CHAIN (values))
10646 TREE_TYPE (TREE_VALUE (values)) = enumtype;
10647 if (at_function_scope_p ())
10648 add_stmt (build_min (TAG_DEFN, enumtype));
10652 /* Determine the minimum and maximum values of the enumerators. */
10653 if (TYPE_VALUES (enumtype))
10655 minnode = maxnode = NULL_TREE;
10657 for (values = TYPE_VALUES (enumtype);
10659 values = TREE_CHAIN (values))
10661 decl = TREE_VALUE (values);
10663 /* [dcl.enum]: Following the closing brace of an enum-specifier,
10664 each enumerator has the type of its enumeration. Prior to the
10665 closing brace, the type of each enumerator is the type of its
10666 initializing value. */
10667 TREE_TYPE (decl) = enumtype;
10669 /* Update the minimum and maximum values, if appropriate. */
10670 value = DECL_INITIAL (decl);
10671 if (value == error_mark_node)
10672 value = integer_zero_node;
10673 /* Figure out what the minimum and maximum values of the
10674 enumerators are. */
10676 minnode = maxnode = value;
10677 else if (tree_int_cst_lt (maxnode, value))
10679 else if (tree_int_cst_lt (value, minnode))
10686 If the enumerator-list is empty, the underlying type is as if
10687 the enumeration had a single enumerator with value 0. */
10688 minnode = maxnode = integer_zero_node;
10690 /* Compute the number of bits require to represent all values of the
10691 enumeration. We must do this before the type of MINNODE and
10692 MAXNODE are transformed, since min_precision relies on the
10693 TREE_TYPE of the value it is passed. */
10694 unsignedp = tree_int_cst_sgn (minnode) >= 0;
10695 lowprec = min_precision (minnode, unsignedp);
10696 highprec = min_precision (maxnode, unsignedp);
10697 precision = MAX (lowprec, highprec);
10699 /* Determine the underlying type of the enumeration.
10703 The underlying type of an enumeration is an integral type that
10704 can represent all the enumerator values defined in the
10705 enumeration. It is implementation-defined which integral type is
10706 used as the underlying type for an enumeration except that the
10707 underlying type shall not be larger than int unless the value of
10708 an enumerator cannot fit in an int or unsigned int.
10710 We use "int" or an "unsigned int" as the underlying type, even if
10711 a smaller integral type would work, unless the user has
10712 explicitly requested that we use the smallest possible type. The
10713 user can request that for all enumerations with a command line
10714 flag, or for just one enumeration with an attribute. */
10716 use_short_enum = flag_short_enums
10717 || lookup_attribute ("packed", TYPE_ATTRIBUTES (enumtype));
10719 for (itk = (use_short_enum ? itk_char : itk_int);
10723 underlying_type = integer_types[itk];
10724 if (TYPE_PRECISION (underlying_type) >= precision
10725 && TYPE_UNSIGNED (underlying_type) == unsignedp)
10728 if (itk == itk_none)
10732 IF no integral type can represent all the enumerator values, the
10733 enumeration is ill-formed. */
10734 error ("no integral type can represent all of the enumerator values "
10735 "for %qT", enumtype);
10736 precision = TYPE_PRECISION (long_long_integer_type_node);
10737 underlying_type = integer_types[itk_unsigned_long_long];
10740 /* Compute the minium and maximum values for the type.
10744 For an enumeration where emin is the smallest enumerator and emax
10745 is the largest, the values of the enumeration are the values of the
10746 underlying type in the range bmin to bmax, where bmin and bmax are,
10747 respectively, the smallest and largest values of the smallest bit-
10748 field that can store emin and emax. */
10750 /* The middle-end currently assumes that types with TYPE_PRECISION
10751 narrower than their underlying type are suitably zero or sign
10752 extended to fill their mode. g++ doesn't make these guarantees.
10753 Until the middle-end can represent such paradoxical types, we
10754 set the TYPE_PRECISION to the width of the underlying type. */
10755 TYPE_PRECISION (enumtype) = TYPE_PRECISION (underlying_type);
10757 set_min_and_max_values_for_integral_type (enumtype, precision, unsignedp);
10761 The value of sizeof() applied to an enumeration type, an object
10762 of an enumeration type, or an enumerator, is the value of sizeof()
10763 applied to the underlying type. */
10764 TYPE_SIZE (enumtype) = TYPE_SIZE (underlying_type);
10765 TYPE_SIZE_UNIT (enumtype) = TYPE_SIZE_UNIT (underlying_type);
10766 TYPE_MODE (enumtype) = TYPE_MODE (underlying_type);
10767 TYPE_ALIGN (enumtype) = TYPE_ALIGN (underlying_type);
10768 TYPE_USER_ALIGN (enumtype) = TYPE_USER_ALIGN (underlying_type);
10769 TYPE_UNSIGNED (enumtype) = TYPE_UNSIGNED (underlying_type);
10771 /* Convert each of the enumerators to the type of the underlying
10772 type of the enumeration. */
10773 for (values = TYPE_VALUES (enumtype); values; values = TREE_CHAIN (values))
10775 location_t saved_location;
10777 decl = TREE_VALUE (values);
10778 saved_location = input_location;
10779 input_location = DECL_SOURCE_LOCATION (decl);
10780 value = perform_implicit_conversion (underlying_type,
10781 DECL_INITIAL (decl));
10782 input_location = saved_location;
10784 /* Do not clobber shared ints. */
10785 value = copy_node (value);
10787 TREE_TYPE (value) = enumtype;
10788 DECL_INITIAL (decl) = value;
10789 TREE_VALUE (values) = value;
10792 /* Fix up all variant types of this enum type. */
10793 for (t = TYPE_MAIN_VARIANT (enumtype); t; t = TYPE_NEXT_VARIANT (t))
10795 TYPE_VALUES (t) = TYPE_VALUES (enumtype);
10796 TYPE_MIN_VALUE (t) = TYPE_MIN_VALUE (enumtype);
10797 TYPE_MAX_VALUE (t) = TYPE_MAX_VALUE (enumtype);
10798 TYPE_SIZE (t) = TYPE_SIZE (enumtype);
10799 TYPE_SIZE_UNIT (t) = TYPE_SIZE_UNIT (enumtype);
10800 TYPE_MODE (t) = TYPE_MODE (enumtype);
10801 TYPE_PRECISION (t) = TYPE_PRECISION (enumtype);
10802 TYPE_ALIGN (t) = TYPE_ALIGN (enumtype);
10803 TYPE_USER_ALIGN (t) = TYPE_USER_ALIGN (enumtype);
10804 TYPE_UNSIGNED (t) = TYPE_UNSIGNED (enumtype);
10807 /* Finish debugging output for this type. */
10808 rest_of_type_compilation (enumtype, namespace_bindings_p ());
10811 /* Build and install a CONST_DECL for an enumeration constant of the
10812 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
10813 Assignment of sequential values by default is handled here. */
10816 build_enumerator (tree name, tree value, tree enumtype)
10822 /* If the VALUE was erroneous, pretend it wasn't there; that will
10823 result in the enum being assigned the next value in sequence. */
10824 if (value == error_mark_node)
10827 /* Remove no-op casts from the value. */
10829 STRIP_TYPE_NOPS (value);
10831 if (! processing_template_decl)
10833 /* Validate and default VALUE. */
10834 if (value != NULL_TREE)
10836 value = integral_constant_value (value);
10838 if (TREE_CODE (value) == INTEGER_CST)
10840 value = perform_integral_promotions (value);
10841 constant_expression_warning (value);
10845 error ("enumerator value for %qD is not an integer constant", name);
10850 /* Default based on previous value. */
10851 if (value == NULL_TREE)
10853 if (TYPE_VALUES (enumtype))
10856 unsigned HOST_WIDE_INT lo;
10860 /* The next value is the previous value plus one. We can
10861 safely assume that the previous value is an INTEGER_CST.
10862 add_double doesn't know the type of the target expression,
10863 so we must check with int_fits_type_p as well. */
10864 prev_value = DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype)));
10865 overflowed = add_double (TREE_INT_CST_LOW (prev_value),
10866 TREE_INT_CST_HIGH (prev_value),
10868 value = build_int_cst_wide (TREE_TYPE (prev_value), lo, hi);
10869 overflowed |= !int_fits_type_p (value, TREE_TYPE (prev_value));
10873 error ("overflow in enumeration values at %qD", name);
10874 value = error_mark_node;
10878 value = integer_zero_node;
10881 /* Remove no-op casts from the value. */
10882 STRIP_TYPE_NOPS (value);
10885 /* C++ associates enums with global, function, or class declarations. */
10886 context = current_scope ();
10888 /* Build the actual enumeration constant. Note that the enumeration
10889 constants have the type of their initializers until the
10890 enumeration is complete:
10894 Following the closing brace of an enum-specifier, each enumer-
10895 ator has the type of its enumeration. Prior to the closing
10896 brace, the type of each enumerator is the type of its
10897 initializing value.
10899 In finish_enum we will reset the type. Of course, if we're
10900 processing a template, there may be no value. */
10901 type = value ? TREE_TYPE (value) : NULL_TREE;
10903 if (context && context == current_class_type)
10904 /* This enum declaration is local to the class. We need the full
10905 lang_decl so that we can record DECL_CLASS_CONTEXT, for example. */
10906 decl = build_lang_decl (CONST_DECL, name, type);
10908 /* It's a global enum, or it's local to a function. (Note local to
10909 a function could mean local to a class method. */
10910 decl = build_decl (CONST_DECL, name, type);
10912 DECL_CONTEXT (decl) = FROB_CONTEXT (context);
10913 TREE_CONSTANT (decl) = 1;
10914 TREE_INVARIANT (decl) = 1;
10915 TREE_READONLY (decl) = 1;
10916 DECL_INITIAL (decl) = value;
10918 if (context && context == current_class_type)
10919 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
10920 on the TYPE_FIELDS list for `S'. (That's so that you can say
10921 things like `S::i' later.) */
10922 finish_member_declaration (decl);
10926 /* Add this enumeration constant to the list for this type. */
10927 TYPE_VALUES (enumtype) = tree_cons (name, decl, TYPE_VALUES (enumtype));
10931 /* We're defining DECL. Make sure that it's type is OK. */
10934 check_function_type (tree decl, tree current_function_parms)
10936 tree fntype = TREE_TYPE (decl);
10937 tree return_type = complete_type (TREE_TYPE (fntype));
10939 /* In a function definition, arg types must be complete. */
10940 require_complete_types_for_parms (current_function_parms);
10942 if (dependent_type_p (return_type))
10944 if (!COMPLETE_OR_VOID_TYPE_P (return_type)
10945 || (TYPE_FOR_JAVA (return_type) && IS_AGGR_TYPE (return_type)))
10947 tree args = TYPE_ARG_TYPES (fntype);
10949 if (!COMPLETE_OR_VOID_TYPE_P (return_type))
10950 error ("return type %q#T is incomplete", return_type);
10952 error ("return type has Java class type %q#T", return_type);
10954 /* Make it return void instead. */
10955 if (TREE_CODE (fntype) == METHOD_TYPE)
10956 fntype = build_method_type_directly (TREE_TYPE (TREE_VALUE (args)),
10958 TREE_CHAIN (args));
10960 fntype = build_function_type (void_type_node, args);
10962 = build_exception_variant (fntype,
10963 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (decl)));
10966 abstract_virtuals_error (decl, TREE_TYPE (fntype));
10969 /* Create the FUNCTION_DECL for a function definition.
10970 DECLSPECS and DECLARATOR are the parts of the declaration;
10971 they describe the function's name and the type it returns,
10972 but twisted together in a fashion that parallels the syntax of C.
10974 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
10975 DECLARATOR is really the DECL for the function we are about to
10976 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
10977 indicating that the function is an inline defined in-class.
10979 This function creates a binding context for the function body
10980 as well as setting up the FUNCTION_DECL in current_function_decl.
10982 For C++, we must first check whether that datum makes any sense.
10983 For example, "class A local_a(1,2);" means that variable local_a
10984 is an aggregate of type A, which should have a constructor
10985 applied to it with the argument list [1, 2].
10987 On entry, DECL_INITIAL (decl1) should be NULL_TREE or error_mark_node,
10988 or may be a BLOCK if the function has been defined previously
10989 in this translation unit. On exit, DECL_INITIAL (decl1) will be
10990 error_mark_node if the function has never been defined, or
10991 a BLOCK if the function has been defined somewhere. */
10994 start_preparsed_function (tree decl1, tree attrs, int flags)
10996 tree ctype = NULL_TREE;
10999 int doing_friend = 0;
11000 struct cp_binding_level *bl;
11001 tree current_function_parms;
11002 struct c_fileinfo *finfo
11003 = get_fileinfo (LOCATION_FILE (DECL_SOURCE_LOCATION (decl1)));
11004 bool honor_interface;
11006 /* Sanity check. */
11007 gcc_assert (TREE_CODE (TREE_VALUE (void_list_node)) == VOID_TYPE);
11008 gcc_assert (TREE_CHAIN (void_list_node) == NULL_TREE);
11010 fntype = TREE_TYPE (decl1);
11011 if (TREE_CODE (fntype) == METHOD_TYPE)
11012 ctype = TYPE_METHOD_BASETYPE (fntype);
11014 /* ISO C++ 11.4/5. A friend function defined in a class is in
11015 the (lexical) scope of the class in which it is defined. */
11016 if (!ctype && DECL_FRIEND_P (decl1))
11018 ctype = DECL_FRIEND_CONTEXT (decl1);
11020 /* CTYPE could be null here if we're dealing with a template;
11021 for example, `inline friend float foo()' inside a template
11022 will have no CTYPE set. */
11023 if (ctype && TREE_CODE (ctype) != RECORD_TYPE)
11029 if (DECL_DECLARED_INLINE_P (decl1)
11030 && lookup_attribute ("noinline", attrs))
11031 warning (0, "inline function %q+D given attribute noinline", decl1);
11033 /* Handle gnu_inline attribute. */
11034 if (GNU_INLINE_P (decl1))
11036 DECL_EXTERNAL (decl1) = 1;
11037 DECL_NOT_REALLY_EXTERN (decl1) = 0;
11038 DECL_INTERFACE_KNOWN (decl1) = 1;
11039 DECL_DISREGARD_INLINE_LIMITS (decl1) = 1;
11042 if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1))
11043 /* This is a constructor, we must ensure that any default args
11044 introduced by this definition are propagated to the clones
11045 now. The clones are used directly in overload resolution. */
11046 adjust_clone_args (decl1);
11048 /* Sometimes we don't notice that a function is a static member, and
11049 build a METHOD_TYPE for it. Fix that up now. */
11050 if (ctype != NULL_TREE && DECL_STATIC_FUNCTION_P (decl1)
11051 && TREE_CODE (TREE_TYPE (decl1)) == METHOD_TYPE)
11053 revert_static_member_fn (decl1);
11057 /* Set up current_class_type, and enter the scope of the class, if
11060 push_nested_class (ctype);
11061 else if (DECL_STATIC_FUNCTION_P (decl1))
11062 push_nested_class (DECL_CONTEXT (decl1));
11064 /* Now that we have entered the scope of the class, we must restore
11065 the bindings for any template parameters surrounding DECL1, if it
11066 is an inline member template. (Order is important; consider the
11067 case where a template parameter has the same name as a field of
11068 the class.) It is not until after this point that
11069 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
11070 if (flags & SF_INCLASS_INLINE)
11071 maybe_begin_member_template_processing (decl1);
11073 /* Effective C++ rule 15. */
11075 && DECL_OVERLOADED_OPERATOR_P (decl1) == NOP_EXPR
11076 && TREE_CODE (TREE_TYPE (fntype)) == VOID_TYPE)
11077 warning (OPT_Weffc__, "%<operator=%> should return a reference to %<*this%>");
11079 /* Make the init_value nonzero so pushdecl knows this is not tentative.
11080 error_mark_node is replaced below (in poplevel) with the BLOCK. */
11081 if (!DECL_INITIAL (decl1))
11082 DECL_INITIAL (decl1) = error_mark_node;
11084 /* This function exists in static storage.
11085 (This does not mean `static' in the C sense!) */
11086 TREE_STATIC (decl1) = 1;
11088 /* We must call push_template_decl after current_class_type is set
11089 up. (If we are processing inline definitions after exiting a
11090 class scope, current_class_type will be NULL_TREE until set above
11091 by push_nested_class.) */
11092 if (processing_template_decl)
11094 /* FIXME: Handle error_mark_node more gracefully. */
11095 tree newdecl1 = push_template_decl (decl1);
11096 if (newdecl1 != error_mark_node)
11100 /* We are now in the scope of the function being defined. */
11101 current_function_decl = decl1;
11103 /* Save the parm names or decls from this function's declarator
11104 where store_parm_decls will find them. */
11105 current_function_parms = DECL_ARGUMENTS (decl1);
11107 /* Make sure the parameter and return types are reasonable. When
11108 you declare a function, these types can be incomplete, but they
11109 must be complete when you define the function. */
11110 check_function_type (decl1, current_function_parms);
11112 /* Build the return declaration for the function. */
11113 restype = TREE_TYPE (fntype);
11114 if (DECL_RESULT (decl1) == NULL_TREE)
11118 resdecl = build_decl (RESULT_DECL, 0, TYPE_MAIN_VARIANT (restype));
11119 DECL_ARTIFICIAL (resdecl) = 1;
11120 DECL_IGNORED_P (resdecl) = 1;
11121 DECL_RESULT (decl1) = resdecl;
11123 cp_apply_type_quals_to_decl (cp_type_quals (restype), resdecl);
11126 /* Let the user know we're compiling this function. */
11127 announce_function (decl1);
11129 /* Record the decl so that the function name is defined.
11130 If we already have a decl for this name, and it is a FUNCTION_DECL,
11131 use the old decl. */
11132 if (!processing_template_decl && !(flags & SF_PRE_PARSED))
11134 /* A specialization is not used to guide overload resolution. */
11135 if (!DECL_FUNCTION_MEMBER_P (decl1)
11136 && !(DECL_USE_TEMPLATE (decl1) &&
11137 PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl1))))
11139 tree olddecl = pushdecl (decl1);
11141 if (olddecl == error_mark_node)
11142 /* If something went wrong when registering the declaration,
11143 use DECL1; we have to have a FUNCTION_DECL to use when
11144 parsing the body of the function. */
11148 /* Otherwise, OLDDECL is either a previous declaration
11149 of the same function or DECL1 itself. */
11151 if (warn_missing_declarations
11152 && olddecl == decl1
11153 && !DECL_MAIN_P (decl1)
11154 && TREE_PUBLIC (decl1)
11155 && !DECL_DECLARED_INLINE_P (decl1))
11159 /* Check whether DECL1 is in an anonymous
11161 for (context = DECL_CONTEXT (decl1);
11163 context = DECL_CONTEXT (context))
11165 if (TREE_CODE (context) == NAMESPACE_DECL
11166 && DECL_NAME (context) == NULL_TREE)
11170 if (context == NULL)
11171 warning (OPT_Wmissing_declarations,
11172 "no previous declaration for %q+D", decl1);
11180 /* We need to set the DECL_CONTEXT. */
11181 if (!DECL_CONTEXT (decl1) && DECL_TEMPLATE_INFO (decl1))
11182 DECL_CONTEXT (decl1) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1));
11184 fntype = TREE_TYPE (decl1);
11186 /* If #pragma weak applies, mark the decl appropriately now.
11187 The pragma only applies to global functions. Because
11188 determining whether or not the #pragma applies involves
11189 computing the mangled name for the declaration, we cannot
11190 apply the pragma until after we have merged this declaration
11191 with any previous declarations; if the original declaration
11192 has a linkage specification, that specification applies to
11193 the definition as well, and may affect the mangled name. */
11194 if (!DECL_CONTEXT (decl1))
11195 maybe_apply_pragma_weak (decl1);
11198 /* Reset this in case the call to pushdecl changed it. */
11199 current_function_decl = decl1;
11201 gcc_assert (DECL_INITIAL (decl1));
11203 /* This function may already have been parsed, in which case just
11204 return; our caller will skip over the body without parsing. */
11205 if (DECL_INITIAL (decl1) != error_mark_node)
11208 /* Initialize RTL machinery. We cannot do this until
11209 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
11210 even when processing a template; this is how we get
11211 CFUN set up, and our per-function variables initialized.
11212 FIXME factor out the non-RTL stuff. */
11213 bl = current_binding_level;
11214 allocate_struct_function (decl1);
11215 current_binding_level = bl;
11217 /* Even though we're inside a function body, we still don't want to
11218 call expand_expr to calculate the size of a variable-sized array.
11219 We haven't necessarily assigned RTL to all variables yet, so it's
11220 not safe to try to expand expressions involving them. */
11221 cfun->x_dont_save_pending_sizes_p = 1;
11223 /* Start the statement-tree, start the tree now. */
11224 DECL_SAVED_TREE (decl1) = push_stmt_list ();
11226 /* If we are (erroneously) defining a function that we have already
11227 defined before, wipe out what we knew before. */
11228 if (!DECL_PENDING_INLINE_P (decl1))
11229 DECL_SAVED_FUNCTION_DATA (decl1) = NULL;
11231 if (ctype && !doing_friend && !DECL_STATIC_FUNCTION_P (decl1))
11233 /* We know that this was set up by `grokclassfn'. We do not
11234 wait until `store_parm_decls', since evil parse errors may
11235 never get us to that point. Here we keep the consistency
11236 between `current_class_type' and `current_class_ptr'. */
11237 tree t = DECL_ARGUMENTS (decl1);
11239 gcc_assert (t != NULL_TREE && TREE_CODE (t) == PARM_DECL);
11240 gcc_assert (TREE_CODE (TREE_TYPE (t)) == POINTER_TYPE);
11242 cp_function_chain->x_current_class_ref
11243 = build_indirect_ref (t, NULL);
11244 cp_function_chain->x_current_class_ptr = t;
11246 /* Constructors and destructors need to know whether they're "in
11247 charge" of initializing virtual base classes. */
11248 t = TREE_CHAIN (t);
11249 if (DECL_HAS_IN_CHARGE_PARM_P (decl1))
11251 current_in_charge_parm = t;
11252 t = TREE_CHAIN (t);
11254 if (DECL_HAS_VTT_PARM_P (decl1))
11256 gcc_assert (DECL_NAME (t) == vtt_parm_identifier);
11257 current_vtt_parm = t;
11261 honor_interface = (!DECL_TEMPLATE_INSTANTIATION (decl1)
11262 /* Implicitly-defined methods (like the
11263 destructor for a class in which no destructor
11264 is explicitly declared) must not be defined
11265 until their definition is needed. So, we
11266 ignore interface specifications for
11267 compiler-generated functions. */
11268 && !DECL_ARTIFICIAL (decl1));
11270 if (DECL_INTERFACE_KNOWN (decl1))
11272 tree ctx = decl_function_context (decl1);
11274 if (DECL_NOT_REALLY_EXTERN (decl1))
11275 DECL_EXTERNAL (decl1) = 0;
11277 if (ctx != NULL_TREE && DECL_DECLARED_INLINE_P (ctx)
11278 && TREE_PUBLIC (ctx))
11279 /* This is a function in a local class in an extern inline
11281 comdat_linkage (decl1);
11283 /* If this function belongs to an interface, it is public.
11284 If it belongs to someone else's interface, it is also external.
11285 This only affects inlines and template instantiations. */
11286 else if (!finfo->interface_unknown && honor_interface)
11288 if (DECL_DECLARED_INLINE_P (decl1)
11289 || DECL_TEMPLATE_INSTANTIATION (decl1)
11290 || processing_template_decl)
11292 DECL_EXTERNAL (decl1)
11293 = (finfo->interface_only
11294 || (DECL_DECLARED_INLINE_P (decl1)
11295 && ! flag_implement_inlines
11296 && !DECL_VINDEX (decl1)));
11298 /* For WIN32 we also want to put these in linkonce sections. */
11299 maybe_make_one_only (decl1);
11302 DECL_EXTERNAL (decl1) = 0;
11303 DECL_INTERFACE_KNOWN (decl1) = 1;
11304 /* If this function is in an interface implemented in this file,
11305 make sure that the back end knows to emit this function
11307 if (!DECL_EXTERNAL (decl1))
11308 mark_needed (decl1);
11310 else if (finfo->interface_unknown && finfo->interface_only
11311 && honor_interface)
11313 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
11314 interface, we will have both finfo->interface_unknown and
11315 finfo->interface_only set. In that case, we don't want to
11316 use the normal heuristics because someone will supply a
11317 #pragma implementation elsewhere, and deducing it here would
11318 produce a conflict. */
11319 comdat_linkage (decl1);
11320 DECL_EXTERNAL (decl1) = 0;
11321 DECL_INTERFACE_KNOWN (decl1) = 1;
11322 DECL_DEFER_OUTPUT (decl1) = 1;
11326 /* This is a definition, not a reference.
11327 So clear DECL_EXTERNAL, unless this is a GNU extern inline. */
11328 if (!GNU_INLINE_P (decl1))
11329 DECL_EXTERNAL (decl1) = 0;
11331 if ((DECL_DECLARED_INLINE_P (decl1)
11332 || DECL_TEMPLATE_INSTANTIATION (decl1))
11333 && ! DECL_INTERFACE_KNOWN (decl1)
11334 /* Don't try to defer nested functions for now. */
11335 && ! decl_function_context (decl1))
11336 DECL_DEFER_OUTPUT (decl1) = 1;
11338 DECL_INTERFACE_KNOWN (decl1) = 1;
11341 /* Determine the ELF visibility attribute for the function. We must not
11342 do this before calling "pushdecl", as we must allow "duplicate_decls"
11343 to merge any attributes appropriately. We also need to wait until
11345 if (!DECL_CLONED_FUNCTION_P (decl1))
11346 determine_visibility (decl1);
11348 begin_scope (sk_function_parms, decl1);
11352 if (DECL_DESTRUCTOR_P (decl1)
11353 || (DECL_CONSTRUCTOR_P (decl1)
11354 && targetm.cxx.cdtor_returns_this ()))
11356 cdtor_label = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
11357 DECL_CONTEXT (cdtor_label) = current_function_decl;
11360 start_fname_decls ();
11362 store_parm_decls (current_function_parms);
11366 /* Like start_preparsed_function, except that instead of a
11367 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
11369 Returns 1 on success. If the DECLARATOR is not suitable for a function
11370 (it defines a datum instead), we return 0, which tells
11371 yyparse to report a parse error. */
11374 start_function (cp_decl_specifier_seq *declspecs,
11375 const cp_declarator *declarator,
11380 decl1 = grokdeclarator (declarator, declspecs, FUNCDEF, 1, &attrs);
11381 /* If the declarator is not suitable for a function definition,
11382 cause a syntax error. */
11383 if (decl1 == NULL_TREE || TREE_CODE (decl1) != FUNCTION_DECL)
11386 if (DECL_MAIN_P (decl1))
11387 /* main must return int. grokfndecl should have corrected it
11388 (and issued a diagnostic) if the user got it wrong. */
11389 gcc_assert (same_type_p (TREE_TYPE (TREE_TYPE (decl1)),
11390 integer_type_node));
11392 start_preparsed_function (decl1, attrs, /*flags=*/SF_DEFAULT);
11397 /* Returns true iff an EH_SPEC_BLOCK should be created in the body of
11401 use_eh_spec_block (tree fn)
11403 return (flag_exceptions && flag_enforce_eh_specs
11404 && !processing_template_decl
11405 && TYPE_RAISES_EXCEPTIONS (TREE_TYPE (fn))
11406 /* We insert the EH_SPEC_BLOCK only in the original
11407 function; then, it is copied automatically to the
11409 && !DECL_CLONED_FUNCTION_P (fn)
11410 /* Implicitly-generated constructors and destructors have
11411 exception specifications. However, those specifications
11412 are the union of the possible exceptions specified by the
11413 constructors/destructors for bases and members, so no
11414 unallowed exception will ever reach this function. By
11415 not creating the EH_SPEC_BLOCK we save a little memory,
11416 and we avoid spurious warnings about unreachable
11418 && !DECL_ARTIFICIAL (fn));
11421 /* Store the parameter declarations into the current function declaration.
11422 This is called after parsing the parameter declarations, before
11423 digesting the body of the function.
11425 Also install to binding contour return value identifier, if any. */
11428 store_parm_decls (tree current_function_parms)
11430 tree fndecl = current_function_decl;
11433 /* This is a chain of any other decls that came in among the parm
11434 declarations. If a parm is declared with enum {foo, bar} x;
11435 then CONST_DECLs for foo and bar are put here. */
11436 tree nonparms = NULL_TREE;
11438 if (current_function_parms)
11440 /* This case is when the function was defined with an ANSI prototype.
11441 The parms already have decls, so we need not do anything here
11442 except record them as in effect
11443 and complain if any redundant old-style parm decls were written. */
11445 tree specparms = current_function_parms;
11448 /* Must clear this because it might contain TYPE_DECLs declared
11450 current_binding_level->names = NULL;
11452 /* If we're doing semantic analysis, then we'll call pushdecl
11453 for each of these. We must do them in reverse order so that
11454 they end in the correct forward order. */
11455 specparms = nreverse (specparms);
11457 for (parm = specparms; parm; parm = next)
11459 next = TREE_CHAIN (parm);
11460 if (TREE_CODE (parm) == PARM_DECL)
11462 if (DECL_NAME (parm) == NULL_TREE
11463 || TREE_CODE (parm) != VOID_TYPE)
11466 error ("parameter %qD declared void", parm);
11470 /* If we find an enum constant or a type tag,
11471 put it aside for the moment. */
11472 TREE_CHAIN (parm) = NULL_TREE;
11473 nonparms = chainon (nonparms, parm);
11477 /* Get the decls in their original chain order and record in the
11478 function. This is all and only the PARM_DECLs that were
11479 pushed into scope by the loop above. */
11480 DECL_ARGUMENTS (fndecl) = getdecls ();
11483 DECL_ARGUMENTS (fndecl) = NULL_TREE;
11485 /* Now store the final chain of decls for the arguments
11486 as the decl-chain of the current lexical scope.
11487 Put the enumerators in as well, at the front so that
11488 DECL_ARGUMENTS is not modified. */
11489 current_binding_level->names = chainon (nonparms, DECL_ARGUMENTS (fndecl));
11491 if (use_eh_spec_block (current_function_decl))
11492 current_eh_spec_block = begin_eh_spec_block ();
11496 /* We have finished doing semantic analysis on DECL, but have not yet
11497 generated RTL for its body. Save away our current state, so that
11498 when we want to generate RTL later we know what to do. */
11501 save_function_data (tree decl)
11503 struct language_function *f;
11505 /* Save the language-specific per-function data so that we can
11506 get it back when we really expand this function. */
11507 gcc_assert (!DECL_PENDING_INLINE_P (decl));
11510 f = GGC_NEW (struct language_function);
11511 memcpy (f, cp_function_chain, sizeof (struct language_function));
11512 DECL_SAVED_FUNCTION_DATA (decl) = f;
11514 /* Clear out the bits we don't need. */
11515 f->base.x_stmt_tree.x_cur_stmt_list = NULL_TREE;
11516 f->bindings = NULL;
11517 f->x_local_names = NULL;
11521 /* Set the return value of the constructor (if present). */
11524 finish_constructor_body (void)
11529 if (targetm.cxx.cdtor_returns_this ())
11531 /* Any return from a constructor will end up here. */
11532 add_stmt (build_stmt (LABEL_EXPR, cdtor_label));
11534 val = DECL_ARGUMENTS (current_function_decl);
11535 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
11536 DECL_RESULT (current_function_decl), val);
11537 /* Return the address of the object. */
11538 exprstmt = build_stmt (RETURN_EXPR, val);
11539 add_stmt (exprstmt);
11543 /* Do all the processing for the beginning of a destructor; set up the
11544 vtable pointers and cleanups for bases and members. */
11547 begin_destructor_body (void)
11549 tree compound_stmt;
11551 /* If the CURRENT_CLASS_TYPE is incomplete, we will have already
11552 issued an error message. We still want to try to process the
11553 body of the function, but initialize_vtbl_ptrs will crash if
11554 TYPE_BINFO is NULL. */
11555 if (COMPLETE_TYPE_P (current_class_type))
11557 compound_stmt = begin_compound_stmt (0);
11558 /* Make all virtual function table pointers in non-virtual base
11559 classes point to CURRENT_CLASS_TYPE's virtual function
11561 initialize_vtbl_ptrs (current_class_ptr);
11562 finish_compound_stmt (compound_stmt);
11564 /* And insert cleanups for our bases and members so that they
11565 will be properly destroyed if we throw. */
11566 push_base_cleanups ();
11570 /* At the end of every destructor we generate code to delete the object if
11571 necessary. Do that now. */
11574 finish_destructor_body (void)
11578 /* Any return from a destructor will end up here; that way all base
11579 and member cleanups will be run when the function returns. */
11580 add_stmt (build_stmt (LABEL_EXPR, cdtor_label));
11582 /* In a virtual destructor, we must call delete. */
11583 if (DECL_VIRTUAL_P (current_function_decl))
11586 tree virtual_size = cxx_sizeof (current_class_type);
11590 At the point of definition of a virtual destructor (including
11591 an implicit definition), non-placement operator delete shall
11592 be looked up in the scope of the destructor's class and if
11593 found shall be accessible and unambiguous. */
11594 exprstmt = build_op_delete_call(DELETE_EXPR, current_class_ptr,
11596 /*global_p=*/false,
11597 /*placement=*/NULL_TREE,
11598 /*alloc_fn=*/NULL_TREE);
11600 if_stmt = begin_if_stmt ();
11601 finish_if_stmt_cond (build2 (BIT_AND_EXPR, integer_type_node,
11602 current_in_charge_parm,
11605 finish_expr_stmt (exprstmt);
11606 finish_then_clause (if_stmt);
11607 finish_if_stmt (if_stmt);
11610 if (targetm.cxx.cdtor_returns_this ())
11614 val = DECL_ARGUMENTS (current_function_decl);
11615 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
11616 DECL_RESULT (current_function_decl), val);
11617 /* Return the address of the object. */
11618 exprstmt = build_stmt (RETURN_EXPR, val);
11619 add_stmt (exprstmt);
11623 /* Do the necessary processing for the beginning of a function body, which
11624 in this case includes member-initializers, but not the catch clauses of
11625 a function-try-block. Currently, this means opening a binding level
11626 for the member-initializers (in a ctor) and member cleanups (in a dtor). */
11629 begin_function_body (void)
11633 if (! FUNCTION_NEEDS_BODY_BLOCK (current_function_decl))
11636 if (processing_template_decl)
11637 /* Do nothing now. */;
11639 /* Always keep the BLOCK node associated with the outermost pair of
11640 curly braces of a function. These are needed for correct
11641 operation of dwarfout.c. */
11642 keep_next_level (true);
11644 stmt = begin_compound_stmt (BCS_FN_BODY);
11646 if (processing_template_decl)
11647 /* Do nothing now. */;
11648 else if (DECL_DESTRUCTOR_P (current_function_decl))
11649 begin_destructor_body ();
11654 /* Do the processing for the end of a function body. Currently, this means
11655 closing out the cleanups for fully-constructed bases and members, and in
11656 the case of the destructor, deleting the object if desired. Again, this
11657 is only meaningful for [cd]tors, since they are the only functions where
11658 there is a significant distinction between the main body and any
11659 function catch clauses. Handling, say, main() return semantics here
11660 would be wrong, as flowing off the end of a function catch clause for
11661 main() would also need to return 0. */
11664 finish_function_body (tree compstmt)
11666 if (compstmt == NULL_TREE)
11669 /* Close the block. */
11670 finish_compound_stmt (compstmt);
11672 if (processing_template_decl)
11673 /* Do nothing now. */;
11674 else if (DECL_CONSTRUCTOR_P (current_function_decl))
11675 finish_constructor_body ();
11676 else if (DECL_DESTRUCTOR_P (current_function_decl))
11677 finish_destructor_body ();
11680 /* Given a function, returns the BLOCK corresponding to the outermost level
11681 of curly braces, skipping the artificial block created for constructor
11685 outer_curly_brace_block (tree fndecl)
11687 tree block = BLOCK_SUBBLOCKS (DECL_INITIAL (fndecl));
11688 if (FUNCTION_NEEDS_BODY_BLOCK (current_function_decl))
11689 /* Skip the artificial function body block. */
11690 block = BLOCK_SUBBLOCKS (block);
11694 /* Finish up a function declaration and compile that function
11695 all the way to assembler language output. The free the storage
11696 for the function definition.
11698 FLAGS is a bitwise or of the following values:
11700 We just finished processing the body of an in-class inline
11701 function definition. (This processing will have taken place
11702 after the class definition is complete.) */
11705 finish_function (int flags)
11707 tree fndecl = current_function_decl;
11708 tree fntype, ctype = NULL_TREE;
11709 int inclass_inline = (flags & 2) != 0;
11712 /* When we get some parse errors, we can end up without a
11713 current_function_decl, so cope. */
11714 if (fndecl == NULL_TREE)
11715 return error_mark_node;
11717 if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fndecl)
11718 && DECL_VIRTUAL_P (fndecl)
11719 && !processing_template_decl)
11721 tree fnclass = DECL_CONTEXT (fndecl);
11722 if (fndecl == CLASSTYPE_KEY_METHOD (fnclass))
11723 keyed_classes = tree_cons (NULL_TREE, fnclass, keyed_classes);
11726 nested = function_depth > 1;
11727 fntype = TREE_TYPE (fndecl);
11729 /* TREE_READONLY (fndecl) = 1;
11730 This caused &foo to be of type ptr-to-const-function
11731 which then got a warning when stored in a ptr-to-function variable. */
11733 gcc_assert (building_stmt_tree ());
11734 /* The current function is being defined, so its DECL_INITIAL should
11735 be set, and unless there's a multiple definition, it should be
11736 error_mark_node. */
11737 gcc_assert (DECL_INITIAL (fndecl) == error_mark_node);
11739 /* For a cloned function, we've already got all the code we need;
11740 there's no need to add any extra bits. */
11741 if (!DECL_CLONED_FUNCTION_P (fndecl))
11743 if (DECL_MAIN_P (current_function_decl))
11747 /* Make it so that `main' always returns 0 by default (or
11750 stmt = finish_return_stmt (integer_one_node);
11752 stmt = finish_return_stmt (integer_zero_node);
11754 /* Hack. We don't want the middle-end to warn that this
11755 return is unreachable, so put the statement on the
11757 #ifdef USE_MAPPED_LOCATION
11759 location_t linezero = linemap_line_start (line_table, 0, 1);
11760 SET_EXPR_LOCATION (stmt, linezero);
11763 annotate_with_file_line (stmt, input_filename, 0);
11767 if (use_eh_spec_block (current_function_decl))
11768 finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
11769 (TREE_TYPE (current_function_decl)),
11770 current_eh_spec_block);
11773 /* If we're saving up tree structure, tie off the function now. */
11774 DECL_SAVED_TREE (fndecl) = pop_stmt_list (DECL_SAVED_TREE (fndecl));
11776 finish_fname_decls ();
11778 /* If this function can't throw any exceptions, remember that. */
11779 if (!processing_template_decl
11780 && !cp_function_chain->can_throw
11781 && !flag_non_call_exceptions
11782 && !DECL_REPLACEABLE_P (fndecl))
11783 TREE_NOTHROW (fndecl) = 1;
11785 /* This must come after expand_function_end because cleanups might
11786 have declarations (from inline functions) that need to go into
11787 this function's blocks. */
11789 /* If the current binding level isn't the outermost binding level
11790 for this function, either there is a bug, or we have experienced
11791 syntax errors and the statement tree is malformed. */
11792 if (current_binding_level->kind != sk_function_parms)
11794 /* Make sure we have already experienced errors. */
11795 gcc_assert (errorcount);
11797 /* Throw away the broken statement tree and extra binding
11799 DECL_SAVED_TREE (fndecl) = alloc_stmt_list ();
11801 while (current_binding_level->kind != sk_function_parms)
11803 if (current_binding_level->kind == sk_class)
11804 pop_nested_class ();
11806 poplevel (0, 0, 0);
11809 poplevel (1, 0, 1);
11811 /* Statements should always be full-expressions at the outermost set
11812 of curly braces for a function. */
11813 gcc_assert (stmts_are_full_exprs_p ());
11815 /* Set up the named return value optimization, if we can. Candidate
11816 variables are selected in check_return_expr. */
11817 if (current_function_return_value)
11819 tree r = current_function_return_value;
11822 if (r != error_mark_node
11823 /* This is only worth doing for fns that return in memory--and
11824 simpler, since we don't have to worry about promoted modes. */
11825 && aggregate_value_p (TREE_TYPE (TREE_TYPE (fndecl)), fndecl)
11826 /* Only allow this for variables declared in the outer scope of
11827 the function so we know that their lifetime always ends with a
11828 return; see g++.dg/opt/nrv6.C. We could be more flexible if
11829 we were to do this optimization in tree-ssa. */
11830 && (outer = outer_curly_brace_block (fndecl))
11831 && chain_member (r, BLOCK_VARS (outer)))
11832 finalize_nrv (&DECL_SAVED_TREE (fndecl), r, DECL_RESULT (fndecl));
11834 current_function_return_value = NULL_TREE;
11837 /* Remember that we were in class scope. */
11838 if (current_class_name)
11839 ctype = current_class_type;
11841 /* Must mark the RESULT_DECL as being in this function. */
11842 DECL_CONTEXT (DECL_RESULT (fndecl)) = fndecl;
11844 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
11845 to the FUNCTION_DECL node itself. */
11846 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl)) = fndecl;
11848 /* Save away current state, if appropriate. */
11849 if (!processing_template_decl)
11850 save_function_data (fndecl);
11852 /* Complain if there's just no return statement. */
11853 if (warn_return_type
11854 && TREE_CODE (TREE_TYPE (fntype)) != VOID_TYPE
11855 && !dependent_type_p (TREE_TYPE (fntype))
11856 && !current_function_returns_value && !current_function_returns_null
11857 /* Don't complain if we abort or throw. */
11858 && !current_function_returns_abnormally
11859 && !DECL_NAME (DECL_RESULT (fndecl))
11860 /* Normally, with -Wreturn-type, flow will complain. Unless we're an
11861 inline function, as we might never be compiled separately. */
11862 && (DECL_INLINE (fndecl) || processing_template_decl)
11863 /* Structor return values (if any) are set by the compiler. */
11864 && !DECL_CONSTRUCTOR_P (fndecl)
11865 && !DECL_DESTRUCTOR_P (fndecl))
11866 warning (OPT_Wreturn_type, "no return statement in function returning non-void");
11868 /* Store the end of the function, so that we get good line number
11869 info for the epilogue. */
11870 cfun->function_end_locus = input_location;
11872 /* Genericize before inlining. */
11873 if (!processing_template_decl)
11875 struct language_function *f = DECL_SAVED_FUNCTION_DATA (fndecl);
11876 cp_genericize (fndecl);
11877 /* Clear out the bits we don't need. */
11878 f->x_current_class_ptr = NULL;
11879 f->x_current_class_ref = NULL;
11880 f->x_eh_spec_block = NULL;
11881 f->x_in_charge_parm = NULL;
11882 f->x_vtt_parm = NULL;
11883 f->x_return_value = NULL;
11884 f->bindings = NULL;
11885 f->extern_decl_map = NULL;
11887 /* Handle attribute((warn_unused_result)). Relies on gimple input. */
11888 c_warn_unused_result (&DECL_SAVED_TREE (fndecl));
11890 /* Clear out the bits we don't need. */
11891 local_names = NULL;
11893 /* We're leaving the context of this function, so zap cfun. It's still in
11894 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
11896 current_function_decl = NULL;
11898 /* If this is an in-class inline definition, we may have to pop the
11899 bindings for the template parameters that we added in
11900 maybe_begin_member_template_processing when start_function was
11902 if (inclass_inline)
11903 maybe_end_member_template_processing ();
11905 /* Leave the scope of the class. */
11907 pop_nested_class ();
11913 /* Let the error reporting routines know that we're outside a
11914 function. For a nested function, this value is used in
11915 cxx_pop_function_context and then reset via pop_function_context. */
11916 current_function_decl = NULL_TREE;
11921 /* Create the FUNCTION_DECL for a function definition.
11922 DECLSPECS and DECLARATOR are the parts of the declaration;
11923 they describe the return type and the name of the function,
11924 but twisted together in a fashion that parallels the syntax of C.
11926 This function creates a binding context for the function body
11927 as well as setting up the FUNCTION_DECL in current_function_decl.
11929 Returns a FUNCTION_DECL on success.
11931 If the DECLARATOR is not suitable for a function (it defines a datum
11932 instead), we return 0, which tells yyparse to report a parse error.
11934 May return void_type_node indicating that this method is actually
11935 a friend. See grokfield for more details.
11937 Came here with a `.pushlevel' .
11939 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
11940 CHANGES TO CODE IN `grokfield'. */
11943 start_method (cp_decl_specifier_seq *declspecs,
11944 const cp_declarator *declarator, tree attrlist)
11946 tree fndecl = grokdeclarator (declarator, declspecs, MEMFUNCDEF, 0,
11949 if (fndecl == error_mark_node)
11950 return error_mark_node;
11952 if (fndecl == NULL || TREE_CODE (fndecl) != FUNCTION_DECL)
11954 error ("invalid member function declaration");
11955 return error_mark_node;
11959 cplus_decl_attributes (&fndecl, attrlist, 0);
11961 /* Pass friends other than inline friend functions back. */
11962 if (fndecl == void_type_node)
11965 if (DECL_IN_AGGR_P (fndecl))
11967 if (DECL_CONTEXT (fndecl)
11968 && TREE_CODE (DECL_CONTEXT (fndecl)) != NAMESPACE_DECL)
11969 error ("%qD is already defined in class %qT", fndecl,
11970 DECL_CONTEXT (fndecl));
11971 return error_mark_node;
11974 check_template_shadow (fndecl);
11976 DECL_DECLARED_INLINE_P (fndecl) = 1;
11977 if (flag_default_inline)
11978 DECL_INLINE (fndecl) = 1;
11980 /* We process method specializations in finish_struct_1. */
11981 if (processing_template_decl && !DECL_TEMPLATE_SPECIALIZATION (fndecl))
11983 fndecl = push_template_decl (fndecl);
11984 if (fndecl == error_mark_node)
11988 if (! DECL_FRIEND_P (fndecl))
11990 if (TREE_CHAIN (fndecl))
11992 fndecl = copy_node (fndecl);
11993 TREE_CHAIN (fndecl) = NULL_TREE;
11997 finish_decl (fndecl, NULL_TREE, NULL_TREE);
11999 /* Make a place for the parms. */
12000 begin_scope (sk_function_parms, fndecl);
12002 DECL_IN_AGGR_P (fndecl) = 1;
12006 /* Go through the motions of finishing a function definition.
12007 We don't compile this method until after the whole class has
12010 FINISH_METHOD must return something that looks as though it
12011 came from GROKFIELD (since we are defining a method, after all).
12013 This is called after parsing the body of the function definition.
12014 STMTS is the chain of statements that makes up the function body.
12016 DECL is the ..._DECL that `start_method' provided. */
12019 finish_method (tree decl)
12021 tree fndecl = decl;
12026 if (decl == void_type_node)
12029 old_initial = DECL_INITIAL (fndecl);
12031 /* Undo the level for the parms (from start_method).
12032 This is like poplevel, but it causes nothing to be
12033 saved. Saving information here confuses symbol-table
12034 output routines. Besides, this information will
12035 be correctly output when this method is actually
12038 /* Clear out the meanings of the local variables of this level;
12039 also record in each decl which block it belongs to. */
12041 for (link = current_binding_level->names; link; link = TREE_CHAIN (link))
12043 if (DECL_NAME (link) != NULL_TREE)
12044 pop_binding (DECL_NAME (link), link);
12045 gcc_assert (TREE_CODE (link) != FUNCTION_DECL);
12046 DECL_CONTEXT (link) = NULL_TREE;
12049 poplevel (0, 0, 0);
12051 DECL_INITIAL (fndecl) = old_initial;
12053 /* We used to check if the context of FNDECL was different from
12054 current_class_type as another way to get inside here. This didn't work
12055 for String.cc in libg++. */
12056 if (DECL_FRIEND_P (fndecl))
12058 VEC_safe_push (tree, gc, CLASSTYPE_INLINE_FRIENDS (current_class_type),
12060 decl = void_type_node;
12067 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
12068 we can lay it out later, when and if its type becomes complete. */
12071 maybe_register_incomplete_var (tree var)
12073 gcc_assert (TREE_CODE (var) == VAR_DECL);
12075 /* Keep track of variables with incomplete types. */
12076 if (!processing_template_decl && TREE_TYPE (var) != error_mark_node
12077 && DECL_EXTERNAL (var))
12079 tree inner_type = TREE_TYPE (var);
12081 while (TREE_CODE (inner_type) == ARRAY_TYPE)
12082 inner_type = TREE_TYPE (inner_type);
12083 inner_type = TYPE_MAIN_VARIANT (inner_type);
12085 if ((!COMPLETE_TYPE_P (inner_type) && CLASS_TYPE_P (inner_type))
12086 /* RTTI TD entries are created while defining the type_info. */
12087 || (TYPE_LANG_SPECIFIC (inner_type)
12088 && TYPE_BEING_DEFINED (inner_type)))
12089 incomplete_vars = tree_cons (inner_type, var, incomplete_vars);
12093 /* Called when a class type (given by TYPE) is defined. If there are
12094 any existing VAR_DECLs whose type hsa been completed by this
12095 declaration, update them now. */
12098 complete_vars (tree type)
12100 tree *list = &incomplete_vars;
12102 gcc_assert (CLASS_TYPE_P (type));
12105 if (same_type_p (type, TREE_PURPOSE (*list)))
12107 tree var = TREE_VALUE (*list);
12108 tree type = TREE_TYPE (var);
12109 /* Complete the type of the variable. The VAR_DECL itself
12110 will be laid out in expand_expr. */
12111 complete_type (type);
12112 cp_apply_type_quals_to_decl (cp_type_quals (type), var);
12113 /* Remove this entry from the list. */
12114 *list = TREE_CHAIN (*list);
12117 list = &TREE_CHAIN (*list);
12120 /* Check for pending declarations which may have abstract type. */
12121 complete_type_check_abstract (type);
12124 /* If DECL is of a type which needs a cleanup, build and return an
12125 expression to perform that cleanup here. Return NULL_TREE if no
12126 cleanup need be done. */
12129 cxx_maybe_build_cleanup (tree decl)
12135 /* Assume no cleanup is required. */
12136 cleanup = NULL_TREE;
12138 if (error_operand_p (decl))
12141 /* Handle "__attribute__((cleanup))". We run the cleanup function
12142 before the destructor since the destructor is what actually
12143 terminates the lifetime of the object. */
12144 attr = lookup_attribute ("cleanup", DECL_ATTRIBUTES (decl));
12151 /* Get the name specified by the user for the cleanup function. */
12152 id = TREE_VALUE (TREE_VALUE (attr));
12153 /* Look up the name to find the cleanup function to call. It is
12154 important to use lookup_name here because that is what is
12155 used in c-common.c:handle_cleanup_attribute when performing
12156 initial checks on the attribute. Note that those checks
12157 include ensuring that the function found is not an overloaded
12158 function, or an object with an overloaded call operator,
12159 etc.; we can rely on the fact that the functionfound is an
12160 ordinary FUNCTION_DECL. */
12161 fn = lookup_name (id);
12162 arg = build_address (decl);
12164 cleanup = build_function_call (fn, build_tree_list (NULL_TREE,
12167 /* Handle ordinary C++ destructors. */
12168 type = TREE_TYPE (decl);
12169 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
12171 int flags = LOOKUP_NORMAL|LOOKUP_DESTRUCTOR;
12172 bool has_vbases = (TREE_CODE (type) == RECORD_TYPE
12173 && CLASSTYPE_VBASECLASSES (type));
12177 if (TREE_CODE (type) == ARRAY_TYPE)
12180 addr = build_address (decl);
12182 /* Optimize for space over speed here. */
12183 if (!has_vbases || flag_expensive_optimizations)
12184 flags |= LOOKUP_NONVIRTUAL;
12186 call = build_delete (TREE_TYPE (addr), addr,
12187 sfk_complete_destructor, flags, 0);
12189 cleanup = build_compound_expr (cleanup, call);
12197 /* When a stmt has been parsed, this function is called. */
12204 /* DECL was originally constructed as a non-static member function,
12205 but turned out to be static. Update it accordingly. */
12208 revert_static_member_fn (tree decl)
12211 tree function = TREE_TYPE (decl);
12212 tree args = TYPE_ARG_TYPES (function);
12214 if (cp_type_quals (TREE_TYPE (TREE_VALUE (args)))
12215 != TYPE_UNQUALIFIED)
12216 error ("static member function %q#D declared with type qualifiers", decl);
12218 args = TREE_CHAIN (args);
12219 tmp = build_function_type (TREE_TYPE (function), args);
12220 tmp = build_qualified_type (tmp, cp_type_quals (function));
12221 tmp = build_exception_variant (tmp,
12222 TYPE_RAISES_EXCEPTIONS (function));
12223 TREE_TYPE (decl) = tmp;
12224 if (DECL_ARGUMENTS (decl))
12225 DECL_ARGUMENTS (decl) = TREE_CHAIN (DECL_ARGUMENTS (decl));
12226 DECL_STATIC_FUNCTION_P (decl) = 1;
12229 /* Initialize the variables used during compilation of a C++
12233 cxx_push_function_context (struct function * f)
12235 struct language_function *p = GGC_CNEW (struct language_function);
12238 /* Whenever we start a new function, we destroy temporaries in the
12240 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
12246 if (DECL_SAVED_FUNCTION_DATA (fn))
12248 /* If we already parsed this function, and we're just expanding it
12249 now, restore saved state. */
12250 *cp_function_chain = *DECL_SAVED_FUNCTION_DATA (fn);
12252 /* We don't need the saved data anymore. Unless this is an inline
12253 function; we need the named return value info for
12254 declare_return_variable. */
12255 if (! DECL_INLINE (fn))
12256 DECL_SAVED_FUNCTION_DATA (fn) = NULL;
12261 /* Free the language-specific parts of F, now that we've finished
12262 compiling the function. */
12265 cxx_pop_function_context (struct function * f)
12270 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
12271 one of the language-independent trees. */
12273 enum cp_tree_node_structure_enum
12274 cp_tree_node_structure (union lang_tree_node * t)
12276 switch (TREE_CODE (&t->generic))
12278 case DEFAULT_ARG: return TS_CP_DEFAULT_ARG;
12279 case IDENTIFIER_NODE: return TS_CP_IDENTIFIER;
12280 case OVERLOAD: return TS_CP_OVERLOAD;
12281 case TEMPLATE_PARM_INDEX: return TS_CP_TPI;
12282 case PTRMEM_CST: return TS_CP_PTRMEM;
12283 case BASELINK: return TS_CP_BASELINK;
12284 case STATIC_ASSERT: return TS_CP_STATIC_ASSERT;
12285 case ARGUMENT_PACK_SELECT: return TS_CP_ARGUMENT_PACK_SELECT;
12286 case TRAIT_EXPR: return TS_CP_TRAIT_EXPR;
12287 default: return TS_CP_GENERIC;
12291 /* Build the void_list_node (void_type_node having been created). */
12293 build_void_list_node (void)
12295 tree t = build_tree_list (NULL_TREE, void_type_node);
12300 cp_missing_noreturn_ok_p (tree decl)
12302 /* A missing noreturn is ok for the `main' function. */
12303 return DECL_MAIN_P (decl);
12306 /* Return the COMDAT group into which DECL should be placed. */
12309 cxx_comdat_group (tree decl)
12313 /* Virtual tables, construction virtual tables, and virtual table
12314 tables all go in a single COMDAT group, named after the primary
12316 if (TREE_CODE (decl) == VAR_DECL && DECL_VTABLE_OR_VTT_P (decl))
12317 name = DECL_ASSEMBLER_NAME (CLASSTYPE_VTABLES (DECL_CONTEXT (decl)));
12318 /* For all other DECLs, the COMDAT group is the mangled name of the
12319 declaration itself. */
12322 while (DECL_THUNK_P (decl))
12324 /* If TARGET_USE_LOCAL_THUNK_ALIAS_P, use_thunk puts the thunk
12325 into the same section as the target function. In that case
12326 we must return target's name. */
12327 tree target = THUNK_TARGET (decl);
12328 if (TARGET_USE_LOCAL_THUNK_ALIAS_P (target)
12329 && DECL_SECTION_NAME (target) != NULL
12330 && DECL_ONE_ONLY (target))
12335 name = DECL_ASSEMBLER_NAME (decl);
12338 return IDENTIFIER_POINTER (name);
12341 #include "gt-cp-decl.h"