1 /* Process declarations and variables for C++ compiler.
2 Copyright (C) 1988, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
3 2001, 2002, 2003, 2004, 2005, 2006 Free Software Foundation, Inc.
4 Contributed by Michael Tiemann (tiemann@cygnus.com)
6 This file is part of GCC.
8 GCC is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2, or (at your option)
13 GCC is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING. If not, write to
20 the Free Software Foundation, 51 Franklin Street, Fifth Floor,
21 Boston, MA 02110-1301, USA. */
24 /* Process declarations and symbol lookup for C++ front end.
25 Also constructs types; the standard scalar types at initialization,
26 and structure, union, array and enum types when they are declared. */
28 /* ??? not all decl nodes are given the most useful possible
29 line numbers. For example, the CONST_DECLs for enum values. */
33 #include "coretypes.h"
40 #include "tree-inline.h"
50 #include "diagnostic.h"
54 #include "tree-flow.h"
56 static tree grokparms (cp_parameter_declarator *, tree *);
57 static const char *redeclaration_error_message (tree, tree);
59 static int decl_jump_unsafe (tree);
60 static void require_complete_types_for_parms (tree);
61 static int ambi_op_p (enum tree_code);
62 static int unary_op_p (enum tree_code);
63 static void push_local_name (tree);
64 static tree grok_reference_init (tree, tree, tree, tree *);
65 static tree grokvardecl (tree, tree, const cp_decl_specifier_seq *,
67 static void record_unknown_type (tree, const char *);
68 static tree builtin_function_1 (tree, tree);
69 static tree build_library_fn_1 (tree, enum tree_code, tree);
70 static int member_function_or_else (tree, tree, enum overload_flags);
71 static void bad_specifiers (tree, const char *, int, int, int, int,
73 static void check_for_uninitialized_const_var (tree);
74 static hashval_t typename_hash (const void *);
75 static int typename_compare (const void *, const void *);
76 static tree local_variable_p_walkfn (tree *, int *, void *);
77 static tree record_builtin_java_type (const char *, int);
78 static const char *tag_name (enum tag_types);
79 static tree lookup_and_check_tag (enum tag_types, tree, tag_scope, bool);
80 static int walk_namespaces_r (tree, walk_namespaces_fn, void *);
81 static void maybe_deduce_size_from_array_init (tree, tree);
82 static void layout_var_decl (tree);
83 static void maybe_commonize_var (tree);
84 static tree check_initializer (tree, tree, int, tree *);
85 static void make_rtl_for_nonlocal_decl (tree, tree, const char *);
86 static void save_function_data (tree);
87 static void check_function_type (tree, tree);
88 static void finish_constructor_body (void);
89 static void begin_destructor_body (void);
90 static void finish_destructor_body (void);
91 static tree create_array_type_for_decl (tree, tree, tree);
92 static tree get_atexit_node (void);
93 static tree get_dso_handle_node (void);
94 static tree start_cleanup_fn (void);
95 static void end_cleanup_fn (void);
96 static tree cp_make_fname_decl (tree, int);
97 static void initialize_predefined_identifiers (void);
98 static tree check_special_function_return_type
99 (special_function_kind, tree, tree);
100 static tree push_cp_library_fn (enum tree_code, tree);
101 static tree build_cp_library_fn (tree, enum tree_code, tree);
102 static void store_parm_decls (tree);
103 static void initialize_local_var (tree, tree);
104 static void expand_static_init (tree, tree);
105 static tree next_initializable_field (tree);
107 /* The following symbols are subsumed in the cp_global_trees array, and
108 listed here individually for documentation purposes.
111 tree wchar_decl_node;
113 tree vtable_entry_type;
114 tree delta_type_node;
115 tree __t_desc_type_node;
117 tree class_type_node;
118 tree unknown_type_node;
120 Array type `vtable_entry_type[]'
123 tree vtbl_ptr_type_node;
130 A FUNCTION_DECL which can call `abort'. Not necessarily the
131 one that the user will declare, but sufficient to be called
132 by routines that want to abort the program.
136 The FUNCTION_DECL for the default `::operator delete'.
138 tree global_delete_fndecl;
141 tree type_info_type_node, tinfo_decl_id, tinfo_decl_type;
142 tree tinfo_var_id; */
144 tree cp_global_trees[CPTI_MAX];
146 /* Indicates that there is a type value in some namespace, although
147 that is not necessarily in scope at the moment. */
149 tree global_type_node;
151 /* The node that holds the "name" of the global scope. */
152 tree global_scope_name;
154 #define local_names cp_function_chain->x_local_names
156 /* A list of objects which have constructors or destructors
157 which reside in the global scope. The decl is stored in
158 the TREE_VALUE slot and the initializer is stored
159 in the TREE_PURPOSE slot. */
160 tree static_aggregates;
164 /* A node for the integer constants 2, and 3. */
166 tree integer_two_node, integer_three_node;
168 /* Used only for jumps to as-yet undefined labels, since jumps to
169 defined labels can have their validity checked immediately. */
171 struct named_label_use_entry GTY(())
173 struct named_label_use_entry *next;
174 /* The binding level to which this entry is *currently* attached.
175 This is initially the binding level in which the goto appeared,
176 but is modified as scopes are closed. */
177 struct cp_binding_level *binding_level;
178 /* The head of the names list that was current when the goto appeared,
179 or the inner scope popped. These are the decls that will *not* be
180 skipped when jumping to the label. */
182 /* The location of the goto, for error reporting. */
183 location_t o_goto_locus;
184 /* True if an OpenMP structured block scope has been closed since
185 the goto appeared. This means that the branch from the label will
186 illegally exit an OpenMP scope. */
190 /* A list of all LABEL_DECLs in the function that have names. Here so
191 we can clear out their names' definitions at the end of the
192 function, and so we can check the validity of jumps to these labels. */
194 struct named_label_entry GTY(())
196 /* The decl itself. */
199 /* The binding level to which the label is *currently* attached.
200 This is initially set to the binding level in which the label
201 is defined, but is modified as scopes are closed. */
202 struct cp_binding_level *binding_level;
203 /* The head of the names list that was current when the label was
204 defined, or the inner scope popped. These are the decls that will
205 be skipped when jumping to the label. */
207 /* A tree list of all decls from all binding levels that would be
208 crossed by a backward branch to the label. */
211 /* A list of uses of the label, before the label is defined. */
212 struct named_label_use_entry *uses;
214 /* The following bits are set after the label is defined, and are
215 updated as scopes are popped. They indicate that a backward jump
216 to the label will illegally enter a scope of the given flavor. */
222 #define named_labels cp_function_chain->x_named_labels
224 /* The number of function bodies which we are currently processing.
225 (Zero if we are at namespace scope, one inside the body of a
226 function, two inside the body of a function in a local class, etc.) */
229 /* States indicating how grokdeclarator() should handle declspecs marked
230 with __attribute__((deprecated)). An object declared as
231 __attribute__((deprecated)) suppresses warnings of uses of other
234 enum deprecated_states {
239 static enum deprecated_states deprecated_state = DEPRECATED_NORMAL;
242 /* A TREE_LIST of VAR_DECLs. The TREE_PURPOSE is a RECORD_TYPE or
243 UNION_TYPE; the TREE_VALUE is a VAR_DECL with that type. At the
244 time the VAR_DECL was declared, the type was incomplete. */
246 static GTY(()) tree incomplete_vars;
248 /* Returns the kind of template specialization we are currently
249 processing, given that it's declaration contained N_CLASS_SCOPES
250 explicit scope qualifications. */
253 current_tmpl_spec_kind (int n_class_scopes)
255 int n_template_parm_scopes = 0;
256 int seen_specialization_p = 0;
257 int innermost_specialization_p = 0;
258 struct cp_binding_level *b;
260 /* Scan through the template parameter scopes. */
261 for (b = current_binding_level;
262 b->kind == sk_template_parms;
265 /* If we see a specialization scope inside a parameter scope,
266 then something is wrong. That corresponds to a declaration
269 template <class T> template <> ...
271 which is always invalid since [temp.expl.spec] forbids the
272 specialization of a class member template if the enclosing
273 class templates are not explicitly specialized as well. */
274 if (b->explicit_spec_p)
276 if (n_template_parm_scopes == 0)
277 innermost_specialization_p = 1;
279 seen_specialization_p = 1;
281 else if (seen_specialization_p == 1)
282 return tsk_invalid_member_spec;
284 ++n_template_parm_scopes;
287 /* Handle explicit instantiations. */
288 if (processing_explicit_instantiation)
290 if (n_template_parm_scopes != 0)
291 /* We've seen a template parameter list during an explicit
292 instantiation. For example:
294 template <class T> template void f(int);
296 This is erroneous. */
297 return tsk_invalid_expl_inst;
299 return tsk_expl_inst;
302 if (n_template_parm_scopes < n_class_scopes)
303 /* We've not seen enough template headers to match all the
304 specialized classes present. For example:
306 template <class T> void R<T>::S<T>::f(int);
308 This is invalid; there needs to be one set of template
309 parameters for each class. */
310 return tsk_insufficient_parms;
311 else if (n_template_parm_scopes == n_class_scopes)
312 /* We're processing a non-template declaration (even though it may
313 be a member of a template class.) For example:
315 template <class T> void S<T>::f(int);
317 The `class T' maches the `S<T>', leaving no template headers
318 corresponding to the `f'. */
320 else if (n_template_parm_scopes > n_class_scopes + 1)
321 /* We've got too many template headers. For example:
323 template <> template <class T> void f (T);
325 There need to be more enclosing classes. */
326 return tsk_excessive_parms;
328 /* This must be a template. It's of the form:
330 template <class T> template <class U> void S<T>::f(U);
332 This is a specialization if the innermost level was a
333 specialization; otherwise it's just a definition of the
335 return innermost_specialization_p ? tsk_expl_spec : tsk_template;
338 /* Exit the current scope. */
346 /* When a label goes out of scope, check to see if that label was used
347 in a valid manner, and issue any appropriate warnings or errors. */
350 pop_label (tree label, tree old_value)
352 if (!processing_template_decl)
354 if (DECL_INITIAL (label) == NULL_TREE)
358 error ("label %q+D used but not defined", label);
359 #ifdef USE_MAPPED_LOCATION
360 location = input_location; /* FIXME want (input_filename, (line)0) */
362 location.file = input_filename;
365 /* Avoid crashing later. */
366 define_label (location, DECL_NAME (label));
368 else if (!TREE_USED (label))
369 warning (OPT_Wunused_label, "label %q+D defined but not used", label);
372 SET_IDENTIFIER_LABEL_VALUE (DECL_NAME (label), old_value);
375 /* At the end of a function, all labels declared within the function
376 go out of scope. BLOCK is the top-level block for the
380 pop_labels_1 (void **slot, void *data)
382 struct named_label_entry *ent = (struct named_label_entry *) *slot;
383 tree block = (tree) data;
385 pop_label (ent->label_decl, NULL_TREE);
387 /* Put the labels into the "variables" of the top-level block,
388 so debugger can see them. */
389 TREE_CHAIN (ent->label_decl) = BLOCK_VARS (block);
390 BLOCK_VARS (block) = ent->label_decl;
392 htab_clear_slot (named_labels, slot);
398 pop_labels (tree block)
402 htab_traverse (named_labels, pop_labels_1, block);
407 /* At the end of a block with local labels, restore the outer definition. */
410 pop_local_label (tree label, tree old_value)
412 struct named_label_entry dummy;
415 pop_label (label, old_value);
417 dummy.label_decl = label;
418 slot = htab_find_slot (named_labels, &dummy, NO_INSERT);
419 htab_clear_slot (named_labels, slot);
422 /* The following two routines are used to interface to Objective-C++.
423 The binding level is purposely treated as an opaque type. */
426 objc_get_current_scope (void)
428 return current_binding_level;
431 /* The following routine is used by the NeXT-style SJLJ exceptions;
432 variables get marked 'volatile' so as to not be clobbered by
433 _setjmp()/_longjmp() calls. All variables in the current scope,
434 as well as parent scopes up to (but not including) ENCLOSING_BLK
435 shall be thusly marked. */
438 objc_mark_locals_volatile (void *enclosing_blk)
440 struct cp_binding_level *scope;
442 for (scope = current_binding_level;
443 scope && scope != enclosing_blk;
444 scope = scope->level_chain)
448 for (decl = scope->names; decl; decl = TREE_CHAIN (decl))
449 objc_volatilize_decl (decl);
451 /* Do not climb up past the current function. */
452 if (scope->kind == sk_function_parms)
457 /* Update data for defined and undefined labels when leaving a scope. */
460 poplevel_named_label_1 (void **slot, void *data)
462 struct named_label_entry *ent = (struct named_label_entry *) *slot;
463 struct cp_binding_level *bl = (struct cp_binding_level *) data;
464 struct cp_binding_level *obl = bl->level_chain;
466 if (ent->binding_level == bl)
470 for (decl = ent->names_in_scope; decl; decl = TREE_CHAIN (decl))
471 if (decl_jump_unsafe (decl))
472 ent->bad_decls = tree_cons (NULL, decl, ent->bad_decls);
474 ent->binding_level = obl;
475 ent->names_in_scope = obl->names;
479 ent->in_try_scope = true;
482 ent->in_catch_scope = true;
485 ent->in_omp_scope = true;
493 struct named_label_use_entry *use;
495 for (use = ent->uses; use ; use = use->next)
496 if (use->binding_level == bl)
498 use->binding_level = obl;
499 use->names_in_scope = obl->names;
500 if (bl->kind == sk_omp)
501 use->in_omp_scope = true;
508 /* Exit a binding level.
509 Pop the level off, and restore the state of the identifier-decl mappings
510 that were in effect when this level was entered.
512 If KEEP == 1, this level had explicit declarations, so
513 and create a "block" (a BLOCK node) for the level
514 to record its declarations and subblocks for symbol table output.
516 If FUNCTIONBODY is nonzero, this level is the body of a function,
517 so create a block as if KEEP were set and also clear out all
520 If REVERSE is nonzero, reverse the order of decls before putting
521 them into the BLOCK. */
524 poplevel (int keep, int reverse, int functionbody)
527 /* The chain of decls was accumulated in reverse order.
528 Put it into forward order, just for cleanliness. */
530 int tmp = functionbody;
531 int real_functionbody;
535 int leaving_for_scope;
538 timevar_push (TV_NAME_LOOKUP);
543 gcc_assert (current_binding_level->kind != sk_class);
545 real_functionbody = (current_binding_level->kind == sk_cleanup
546 ? ((functionbody = 0), tmp) : functionbody);
547 subblocks = functionbody >= 0 ? current_binding_level->blocks : 0;
549 gcc_assert (!VEC_length(cp_class_binding,
550 current_binding_level->class_shadowed));
552 /* We used to use KEEP == 2 to indicate that the new block should go
553 at the beginning of the list of blocks at this binding level,
554 rather than the end. This hack is no longer used. */
555 gcc_assert (keep == 0 || keep == 1);
557 if (current_binding_level->keep)
560 /* Any uses of undefined labels, and any defined labels, now operate
561 under constraints of next binding contour. */
562 if (cfun && !functionbody && named_labels)
563 htab_traverse (named_labels, poplevel_named_label_1,
564 current_binding_level);
566 /* Get the decls in the order they were written.
567 Usually current_binding_level->names is in reverse order.
568 But parameter decls were previously put in forward order. */
571 current_binding_level->names
572 = decls = nreverse (current_binding_level->names);
574 decls = current_binding_level->names;
576 /* If there were any declarations or structure tags in that level,
577 or if this level is a function body,
578 create a BLOCK to record them for the life of this function. */
580 if (keep == 1 || functionbody)
581 block = make_node (BLOCK);
582 if (block != NULL_TREE)
584 BLOCK_VARS (block) = decls;
585 BLOCK_SUBBLOCKS (block) = subblocks;
588 /* In each subblock, record that this is its superior. */
590 for (link = subblocks; link; link = TREE_CHAIN (link))
591 BLOCK_SUPERCONTEXT (link) = block;
593 /* We still support the old for-scope rules, whereby the variables
594 in a for-init statement were in scope after the for-statement
595 ended. We only use the new rules if flag_new_for_scope is
598 = current_binding_level->kind == sk_for && flag_new_for_scope == 1;
600 /* Before we remove the declarations first check for unused variables. */
601 if (warn_unused_variable
602 && !processing_template_decl)
603 for (decl = getdecls (); decl; decl = TREE_CHAIN (decl))
604 if (TREE_CODE (decl) == VAR_DECL
605 && ! TREE_USED (decl)
606 && ! DECL_IN_SYSTEM_HEADER (decl)
607 && DECL_NAME (decl) && ! DECL_ARTIFICIAL (decl))
608 warning (OPT_Wunused_variable, "unused variable %q+D", decl);
610 /* Remove declarations for all the DECLs in this level. */
611 for (link = decls; link; link = TREE_CHAIN (link))
613 if (leaving_for_scope && TREE_CODE (link) == VAR_DECL
616 tree name = DECL_NAME (link);
620 ob = outer_binding (name,
621 IDENTIFIER_BINDING (name),
624 ns_binding = IDENTIFIER_NAMESPACE_VALUE (name);
626 ns_binding = NULL_TREE;
628 if (ob && ob->scope == current_binding_level->level_chain)
629 /* We have something like:
634 and we are leaving the `for' scope. There's no reason to
635 keep the binding of the inner `i' in this case. */
636 pop_binding (name, link);
637 else if ((ob && (TREE_CODE (ob->value) == TYPE_DECL))
638 || (ns_binding && TREE_CODE (ns_binding) == TYPE_DECL))
639 /* Here, we have something like:
647 We must pop the for-scope binding so we know what's a
648 type and what isn't. */
649 pop_binding (name, link);
652 /* Mark this VAR_DECL as dead so that we can tell we left it
653 there only for backward compatibility. */
654 DECL_DEAD_FOR_LOCAL (link) = 1;
656 /* Keep track of what should have happened when we
657 popped the binding. */
660 SET_DECL_SHADOWED_FOR_VAR (link, ob->value);
661 DECL_HAS_SHADOWED_FOR_VAR_P (link) = 1;
664 /* Add it to the list of dead variables in the next
665 outermost binding to that we can remove these when we
666 leave that binding. */
667 current_binding_level->level_chain->dead_vars_from_for
668 = tree_cons (NULL_TREE, link,
669 current_binding_level->level_chain->
672 /* Although we don't pop the cxx_binding, we do clear
673 its SCOPE since the scope is going away now. */
674 IDENTIFIER_BINDING (name)->scope
675 = current_binding_level->level_chain;
682 /* Remove the binding. */
685 if (TREE_CODE (decl) == TREE_LIST)
686 decl = TREE_VALUE (decl);
689 if (TREE_CODE (name) == OVERLOAD)
690 name = OVL_FUNCTION (name);
692 gcc_assert (DECL_P (name));
693 pop_binding (DECL_NAME (name), decl);
697 /* Remove declarations for any `for' variables from inner scopes
698 that we kept around. */
699 for (link = current_binding_level->dead_vars_from_for;
700 link; link = TREE_CHAIN (link))
701 pop_binding (DECL_NAME (TREE_VALUE (link)), TREE_VALUE (link));
703 /* Restore the IDENTIFIER_TYPE_VALUEs. */
704 for (link = current_binding_level->type_shadowed;
705 link; link = TREE_CHAIN (link))
706 SET_IDENTIFIER_TYPE_VALUE (TREE_PURPOSE (link), TREE_VALUE (link));
708 /* Restore the IDENTIFIER_LABEL_VALUEs for local labels. */
709 for (link = current_binding_level->shadowed_labels;
711 link = TREE_CHAIN (link))
712 pop_local_label (TREE_VALUE (link), TREE_PURPOSE (link));
714 /* There may be OVERLOADs (wrapped in TREE_LISTs) on the BLOCK_VARs
715 list if a `using' declaration put them there. The debugging
716 back-ends won't understand OVERLOAD, so we remove them here.
717 Because the BLOCK_VARS are (temporarily) shared with
718 CURRENT_BINDING_LEVEL->NAMES we must do this fixup after we have
719 popped all the bindings. */
724 for (d = &BLOCK_VARS (block); *d; )
726 if (TREE_CODE (*d) == TREE_LIST)
727 *d = TREE_CHAIN (*d);
729 d = &TREE_CHAIN (*d);
733 /* If the level being exited is the top level of a function,
734 check over all the labels. */
737 /* Since this is the top level block of a function, the vars are
738 the function's parameters. Don't leave them in the BLOCK
739 because they are found in the FUNCTION_DECL instead. */
740 BLOCK_VARS (block) = 0;
744 kind = current_binding_level->kind;
745 if (kind == sk_cleanup)
749 /* If this is a temporary binding created for a cleanup, then we'll
750 have pushed a statement list level. Pop that, create a new
751 BIND_EXPR for the block, and insert it into the stream. */
752 stmt = pop_stmt_list (current_binding_level->statement_list);
753 stmt = c_build_bind_expr (block, stmt);
759 DECL_INITIAL (current_function_decl) = block;
761 current_binding_level->blocks
762 = chainon (current_binding_level->blocks, block);
764 /* If we did not make a block for the level just exited,
765 any blocks made for inner levels
766 (since they cannot be recorded as subblocks in that level)
767 must be carried forward so they will later become subblocks
768 of something else. */
770 current_binding_level->blocks
771 = chainon (current_binding_level->blocks, subblocks);
773 /* Each and every BLOCK node created here in `poplevel' is important
774 (e.g. for proper debugging information) so if we created one
775 earlier, mark it as "used". */
777 TREE_USED (block) = 1;
779 /* All temporary bindings created for cleanups are popped silently. */
780 if (kind == sk_cleanup)
783 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, block);
786 /* Insert BLOCK at the end of the list of subblocks of the
787 current binding level. This is used when a BIND_EXPR is expanded,
788 to handle the BLOCK node inside the BIND_EXPR. */
791 insert_block (tree block)
793 TREE_USED (block) = 1;
794 current_binding_level->blocks
795 = chainon (current_binding_level->blocks, block);
798 /* Walk all the namespaces contained NAMESPACE, including NAMESPACE
799 itself, calling F for each. The DATA is passed to F as well. */
802 walk_namespaces_r (tree namespace, walk_namespaces_fn f, void* data)
805 tree current = NAMESPACE_LEVEL (namespace)->namespaces;
807 result |= (*f) (namespace, data);
809 for (; current; current = TREE_CHAIN (current))
810 result |= walk_namespaces_r (current, f, data);
815 /* Walk all the namespaces, calling F for each. The DATA is passed to
819 walk_namespaces (walk_namespaces_fn f, void* data)
821 return walk_namespaces_r (global_namespace, f, data);
824 /* Call wrapup_globals_declarations for the globals in NAMESPACE. If
825 DATA is non-NULL, this is the last time we will call
826 wrapup_global_declarations for this NAMESPACE. */
829 wrapup_globals_for_namespace (tree namespace, void* data)
831 struct cp_binding_level *level = NAMESPACE_LEVEL (namespace);
832 VEC(tree,gc) *statics = level->static_decls;
833 tree *vec = VEC_address (tree, statics);
834 int len = VEC_length (tree, statics);
835 int last_time = (data != 0);
839 check_global_declarations (vec, len);
840 emit_debug_global_declarations (vec, len);
844 /* Write out any globals that need to be output. */
845 return wrapup_global_declarations (vec, len);
849 /* In C++, you don't have to write `struct S' to refer to `S'; you
850 can just use `S'. We accomplish this by creating a TYPE_DECL as
851 if the user had written `typedef struct S S'. Create and return
852 the TYPE_DECL for TYPE. */
855 create_implicit_typedef (tree name, tree type)
859 decl = build_decl (TYPE_DECL, name, type);
860 DECL_ARTIFICIAL (decl) = 1;
861 /* There are other implicit type declarations, like the one *within*
862 a class that allows you to write `S::S'. We must distinguish
864 SET_DECL_IMPLICIT_TYPEDEF_P (decl);
865 TYPE_NAME (type) = decl;
870 /* Remember a local name for name-mangling purposes. */
873 push_local_name (tree decl)
878 timevar_push (TV_NAME_LOOKUP);
880 name = DECL_NAME (decl);
882 nelts = VEC_length (tree, local_names);
883 for (i = 0; i < nelts; i++)
885 t = VEC_index (tree, local_names, i);
886 if (DECL_NAME (t) == name)
888 if (!DECL_LANG_SPECIFIC (decl))
889 retrofit_lang_decl (decl);
890 DECL_LANG_SPECIFIC (decl)->decl_flags.u2sel = 1;
891 if (DECL_LANG_SPECIFIC (t))
892 DECL_DISCRIMINATOR (decl) = DECL_DISCRIMINATOR (t) + 1;
894 DECL_DISCRIMINATOR (decl) = 1;
896 VEC_replace (tree, local_names, i, decl);
897 timevar_pop (TV_NAME_LOOKUP);
902 VEC_safe_push (tree, gc, local_names, decl);
903 timevar_pop (TV_NAME_LOOKUP);
906 /* Subroutine of duplicate_decls: return truthvalue of whether
907 or not types of these decls match.
909 For C++, we must compare the parameter list so that `int' can match
910 `int&' in a parameter position, but `int&' is not confused with
914 decls_match (tree newdecl, tree olddecl)
918 if (newdecl == olddecl)
921 if (TREE_CODE (newdecl) != TREE_CODE (olddecl))
922 /* If the two DECLs are not even the same kind of thing, we're not
923 interested in their types. */
926 if (TREE_CODE (newdecl) == FUNCTION_DECL)
928 tree f1 = TREE_TYPE (newdecl);
929 tree f2 = TREE_TYPE (olddecl);
930 tree p1 = TYPE_ARG_TYPES (f1);
931 tree p2 = TYPE_ARG_TYPES (f2);
933 if (CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl)
934 && ! (DECL_EXTERN_C_P (newdecl)
935 && DECL_EXTERN_C_P (olddecl)))
938 if (TREE_CODE (f1) != TREE_CODE (f2))
941 if (same_type_p (TREE_TYPE (f1), TREE_TYPE (f2)))
943 if (p2 == NULL_TREE && DECL_EXTERN_C_P (olddecl)
944 && (DECL_BUILT_IN (olddecl)
945 #ifndef NO_IMPLICIT_EXTERN_C
946 || (DECL_IN_SYSTEM_HEADER (newdecl) && !DECL_CLASS_SCOPE_P (newdecl))
947 || (DECL_IN_SYSTEM_HEADER (olddecl) && !DECL_CLASS_SCOPE_P (olddecl))
951 types_match = self_promoting_args_p (p1);
952 if (p1 == void_list_node)
953 TREE_TYPE (newdecl) = TREE_TYPE (olddecl);
955 #ifndef NO_IMPLICIT_EXTERN_C
956 else if (p1 == NULL_TREE
957 && (DECL_EXTERN_C_P (olddecl)
958 && DECL_IN_SYSTEM_HEADER (olddecl)
959 && !DECL_CLASS_SCOPE_P (olddecl))
960 && (DECL_EXTERN_C_P (newdecl)
961 && DECL_IN_SYSTEM_HEADER (newdecl)
962 && !DECL_CLASS_SCOPE_P (newdecl)))
964 types_match = self_promoting_args_p (p2);
965 TREE_TYPE (newdecl) = TREE_TYPE (olddecl);
969 types_match = compparms (p1, p2);
974 else if (TREE_CODE (newdecl) == TEMPLATE_DECL)
976 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl))
977 != TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)))
980 if (!comp_template_parms (DECL_TEMPLATE_PARMS (newdecl),
981 DECL_TEMPLATE_PARMS (olddecl)))
984 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
985 types_match = same_type_p (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl)),
986 TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl)));
988 types_match = decls_match (DECL_TEMPLATE_RESULT (olddecl),
989 DECL_TEMPLATE_RESULT (newdecl));
993 /* Need to check scope for variable declaration (VAR_DECL).
994 For typedef (TYPE_DECL), scope is ignored. */
995 if (TREE_CODE (newdecl) == VAR_DECL
996 && CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl)
998 Two declarations for an object with C language linkage
999 with the same name (ignoring the namespace that qualify
1000 it) that appear in different namespace scopes refer to
1002 && !(DECL_EXTERN_C_P (olddecl) && DECL_EXTERN_C_P (newdecl)))
1005 if (TREE_TYPE (newdecl) == error_mark_node)
1006 types_match = TREE_TYPE (olddecl) == error_mark_node;
1007 else if (TREE_TYPE (olddecl) == NULL_TREE)
1008 types_match = TREE_TYPE (newdecl) == NULL_TREE;
1009 else if (TREE_TYPE (newdecl) == NULL_TREE)
1012 types_match = comptypes (TREE_TYPE (newdecl),
1013 TREE_TYPE (olddecl),
1014 COMPARE_REDECLARATION);
1020 /* If NEWDECL is `static' and an `extern' was seen previously,
1021 warn about it. OLDDECL is the previous declaration.
1023 Note that this does not apply to the C++ case of declaring
1024 a variable `extern const' and then later `const'.
1026 Don't complain about built-in functions, since they are beyond
1027 the user's control. */
1030 warn_extern_redeclared_static (tree newdecl, tree olddecl)
1034 if (TREE_CODE (newdecl) == TYPE_DECL
1035 || TREE_CODE (newdecl) == TEMPLATE_DECL
1036 || TREE_CODE (newdecl) == CONST_DECL
1037 || TREE_CODE (newdecl) == NAMESPACE_DECL)
1040 /* Don't get confused by static member functions; that's a different
1042 if (TREE_CODE (newdecl) == FUNCTION_DECL
1043 && DECL_STATIC_FUNCTION_P (newdecl))
1046 /* If the old declaration was `static', or the new one isn't, then
1047 then everything is OK. */
1048 if (DECL_THIS_STATIC (olddecl) || !DECL_THIS_STATIC (newdecl))
1051 /* It's OK to declare a builtin function as `static'. */
1052 if (TREE_CODE (olddecl) == FUNCTION_DECL
1053 && DECL_ARTIFICIAL (olddecl))
1056 name = DECL_ASSEMBLER_NAME (newdecl);
1057 pedwarn ("%qD was declared %<extern%> and later %<static%>", newdecl);
1058 pedwarn ("previous declaration of %q+D", olddecl);
1061 /* NEW_DECL is a redeclaration of OLD_DECL; both are functions or
1062 function templates. If their exception specifications do not
1063 match, issue an a diagnostic. */
1066 check_redeclaration_exception_specification (tree new_decl,
1071 tree new_exceptions;
1072 tree old_exceptions;
1074 new_type = TREE_TYPE (new_decl);
1075 new_exceptions = TYPE_RAISES_EXCEPTIONS (new_type);
1076 old_type = TREE_TYPE (old_decl);
1077 old_exceptions = TYPE_RAISES_EXCEPTIONS (old_type);
1081 If any declaration of a function has an exception-specification,
1082 all declarations, including the definition and an explicit
1083 specialization, of that function shall have an
1084 exception-specification with the same set of type-ids. */
1085 if ((pedantic || ! DECL_IN_SYSTEM_HEADER (old_decl))
1086 && ! DECL_IS_BUILTIN (old_decl)
1088 && !comp_except_specs (new_exceptions, old_exceptions,
1091 error ("declaration of %qF throws different exceptions", new_decl);
1092 error ("from previous declaration %q+F", old_decl);
1096 /* If NEWDECL is a redeclaration of OLDDECL, merge the declarations.
1097 If the redeclaration is invalid, a diagnostic is issued, and the
1098 error_mark_node is returned. Otherwise, OLDDECL is returned.
1100 If NEWDECL is not a redeclaration of OLDDECL, NULL_TREE is
1103 NEWDECL_IS_FRIEND is true if NEWDECL was declared as a friend. */
1106 duplicate_decls (tree newdecl, tree olddecl, bool newdecl_is_friend)
1108 unsigned olddecl_uid = DECL_UID (olddecl);
1109 int olddecl_friend = 0, types_match = 0, hidden_friend = 0;
1110 int new_defines_function = 0;
1113 if (newdecl == olddecl)
1116 types_match = decls_match (newdecl, olddecl);
1118 /* If either the type of the new decl or the type of the old decl is an
1119 error_mark_node, then that implies that we have already issued an
1120 error (earlier) for some bogus type specification, and in that case,
1121 it is rather pointless to harass the user with yet more error message
1122 about the same declaration, so just pretend the types match here. */
1123 if (TREE_TYPE (newdecl) == error_mark_node
1124 || TREE_TYPE (olddecl) == error_mark_node)
1125 return error_mark_node;
1127 if (DECL_P (olddecl)
1128 && TREE_CODE (newdecl) == FUNCTION_DECL
1129 && TREE_CODE (olddecl) == FUNCTION_DECL
1130 && (DECL_UNINLINABLE (newdecl) || DECL_UNINLINABLE (olddecl)))
1132 if (DECL_DECLARED_INLINE_P (newdecl)
1133 && DECL_UNINLINABLE (newdecl)
1134 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl)))
1135 /* Already warned elsewhere. */;
1136 else if (DECL_DECLARED_INLINE_P (olddecl)
1137 && DECL_UNINLINABLE (olddecl)
1138 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl)))
1139 /* Already warned. */;
1140 else if (DECL_DECLARED_INLINE_P (newdecl)
1141 && DECL_UNINLINABLE (olddecl)
1142 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl)))
1144 warning (OPT_Wattributes, "function %q+D redeclared as inline",
1146 warning (OPT_Wattributes, "previous declaration of %q+D "
1147 "with attribute noinline", olddecl);
1149 else if (DECL_DECLARED_INLINE_P (olddecl)
1150 && DECL_UNINLINABLE (newdecl)
1151 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl)))
1153 warning (OPT_Wattributes, "function %q+D redeclared with "
1154 "attribute noinline", newdecl);
1155 warning (OPT_Wattributes, "previous declaration of %q+D was inline",
1160 /* Check for redeclaration and other discrepancies. */
1161 if (TREE_CODE (olddecl) == FUNCTION_DECL
1162 && DECL_ARTIFICIAL (olddecl))
1164 gcc_assert (!DECL_HIDDEN_FRIEND_P (olddecl));
1165 if (TREE_CODE (newdecl) != FUNCTION_DECL)
1167 /* Avoid warnings redeclaring built-ins which have not been
1168 explicitly declared. */
1169 if (DECL_ANTICIPATED (olddecl))
1172 /* If you declare a built-in or predefined function name as static,
1173 the old definition is overridden, but optionally warn this was a
1174 bad choice of name. */
1175 if (! TREE_PUBLIC (newdecl))
1177 warning (OPT_Wshadow, "shadowing %s function %q#D",
1178 DECL_BUILT_IN (olddecl) ? "built-in" : "library",
1180 /* Discard the old built-in function. */
1183 /* If the built-in is not ansi, then programs can override
1184 it even globally without an error. */
1185 else if (! DECL_BUILT_IN (olddecl))
1186 warning (0, "library function %q#D redeclared as non-function %q#D",
1190 error ("declaration of %q#D", newdecl);
1191 error ("conflicts with built-in declaration %q#D",
1196 else if (!types_match)
1198 /* Avoid warnings redeclaring built-ins which have not been
1199 explicitly declared. */
1200 if (DECL_ANTICIPATED (olddecl))
1202 /* Deal with fileptr_type_node. FILE type is not known
1203 at the time we create the builtins. */
1206 for (t1 = TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1207 t2 = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1209 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2))
1212 else if (TREE_VALUE (t2) == fileptr_type_node)
1214 tree t = TREE_VALUE (t1);
1216 if (TREE_CODE (t) == POINTER_TYPE
1217 && TYPE_NAME (TREE_TYPE (t))
1218 && DECL_NAME (TYPE_NAME (TREE_TYPE (t)))
1219 == get_identifier ("FILE")
1220 && compparms (TREE_CHAIN (t1), TREE_CHAIN (t2)))
1222 tree oldargs = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1224 TYPE_ARG_TYPES (TREE_TYPE (olddecl))
1225 = TYPE_ARG_TYPES (TREE_TYPE (newdecl));
1226 types_match = decls_match (newdecl, olddecl);
1228 return duplicate_decls (newdecl, olddecl,
1230 TYPE_ARG_TYPES (TREE_TYPE (olddecl)) = oldargs;
1233 else if (! same_type_p (TREE_VALUE (t1), TREE_VALUE (t2)))
1236 else if ((DECL_EXTERN_C_P (newdecl)
1237 && DECL_EXTERN_C_P (olddecl))
1238 || compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1239 TYPE_ARG_TYPES (TREE_TYPE (olddecl))))
1241 /* A near match; override the builtin. */
1243 if (TREE_PUBLIC (newdecl))
1245 warning (0, "new declaration %q#D", newdecl);
1246 warning (0, "ambiguates built-in declaration %q#D",
1250 warning (OPT_Wshadow, "shadowing %s function %q#D",
1251 DECL_BUILT_IN (olddecl) ? "built-in" : "library",
1255 /* Discard the old built-in function. */
1258 /* Replace the old RTL to avoid problems with inlining. */
1259 COPY_DECL_RTL (newdecl, olddecl);
1261 /* Even if the types match, prefer the new declarations type for
1262 built-ins which have not been explicitly declared, for
1263 exception lists, etc... */
1264 else if (DECL_ANTICIPATED (olddecl))
1266 tree type = TREE_TYPE (newdecl);
1267 tree attribs = (*targetm.merge_type_attributes)
1268 (TREE_TYPE (olddecl), type);
1270 type = cp_build_type_attribute_variant (type, attribs);
1271 TREE_TYPE (newdecl) = TREE_TYPE (olddecl) = type;
1274 /* Whether or not the builtin can throw exceptions has no
1275 bearing on this declarator. */
1276 TREE_NOTHROW (olddecl) = 0;
1278 if (DECL_THIS_STATIC (newdecl) && !DECL_THIS_STATIC (olddecl))
1280 /* If a builtin function is redeclared as `static', merge
1281 the declarations, but make the original one static. */
1282 DECL_THIS_STATIC (olddecl) = 1;
1283 TREE_PUBLIC (olddecl) = 0;
1285 /* Make the old declaration consistent with the new one so
1286 that all remnants of the builtin-ness of this function
1287 will be banished. */
1288 SET_DECL_LANGUAGE (olddecl, DECL_LANGUAGE (newdecl));
1289 COPY_DECL_RTL (newdecl, olddecl);
1292 else if (TREE_CODE (olddecl) != TREE_CODE (newdecl))
1294 if ((TREE_CODE (olddecl) == TYPE_DECL && DECL_ARTIFICIAL (olddecl)
1295 && TREE_CODE (newdecl) != TYPE_DECL
1296 && ! (TREE_CODE (newdecl) == TEMPLATE_DECL
1297 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL))
1298 || (TREE_CODE (newdecl) == TYPE_DECL && DECL_ARTIFICIAL (newdecl)
1299 && TREE_CODE (olddecl) != TYPE_DECL
1300 && ! (TREE_CODE (olddecl) == TEMPLATE_DECL
1301 && (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl))
1304 /* We do nothing special here, because C++ does such nasty
1305 things with TYPE_DECLs. Instead, just let the TYPE_DECL
1306 get shadowed, and know that if we need to find a TYPE_DECL
1307 for a given name, we can look in the IDENTIFIER_TYPE_VALUE
1308 slot of the identifier. */
1312 if ((TREE_CODE (newdecl) == FUNCTION_DECL
1313 && DECL_FUNCTION_TEMPLATE_P (olddecl))
1314 || (TREE_CODE (olddecl) == FUNCTION_DECL
1315 && DECL_FUNCTION_TEMPLATE_P (newdecl)))
1318 error ("%q#D redeclared as different kind of symbol", newdecl);
1319 if (TREE_CODE (olddecl) == TREE_LIST)
1320 olddecl = TREE_VALUE (olddecl);
1321 error ("previous declaration of %q+#D", olddecl);
1323 return error_mark_node;
1325 else if (!types_match)
1327 if (CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl))
1328 /* These are certainly not duplicate declarations; they're
1329 from different scopes. */
1332 if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1334 /* The name of a class template may not be declared to refer to
1335 any other template, class, function, object, namespace, value,
1336 or type in the same scope. */
1337 if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) == TYPE_DECL
1338 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
1340 error ("declaration of template %q#D", newdecl);
1341 error ("conflicts with previous declaration %q+#D", olddecl);
1343 else if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) == FUNCTION_DECL
1344 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == FUNCTION_DECL
1345 && compparms (TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl))),
1346 TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl))))
1347 && comp_template_parms (DECL_TEMPLATE_PARMS (newdecl),
1348 DECL_TEMPLATE_PARMS (olddecl))
1349 /* Template functions can be disambiguated by
1351 && same_type_p (TREE_TYPE (TREE_TYPE (newdecl)),
1352 TREE_TYPE (TREE_TYPE (olddecl))))
1354 error ("new declaration %q#D", newdecl);
1355 error ("ambiguates old declaration %q+#D", olddecl);
1359 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1361 if (DECL_EXTERN_C_P (newdecl) && DECL_EXTERN_C_P (olddecl))
1363 error ("declaration of C function %q#D conflicts with",
1365 error ("previous declaration %q+#D here", olddecl);
1367 else if (compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1368 TYPE_ARG_TYPES (TREE_TYPE (olddecl))))
1370 error ("new declaration %q#D", newdecl);
1371 error ("ambiguates old declaration %q+#D", olddecl);
1372 return error_mark_node;
1379 error ("conflicting declaration %q#D", newdecl);
1380 error ("%q+D has a previous declaration as %q#D", olddecl, olddecl);
1381 return error_mark_node;
1384 else if (TREE_CODE (newdecl) == FUNCTION_DECL
1385 && ((DECL_TEMPLATE_SPECIALIZATION (olddecl)
1386 && (!DECL_TEMPLATE_INFO (newdecl)
1387 || (DECL_TI_TEMPLATE (newdecl)
1388 != DECL_TI_TEMPLATE (olddecl))))
1389 || (DECL_TEMPLATE_SPECIALIZATION (newdecl)
1390 && (!DECL_TEMPLATE_INFO (olddecl)
1391 || (DECL_TI_TEMPLATE (olddecl)
1392 != DECL_TI_TEMPLATE (newdecl))))))
1393 /* It's OK to have a template specialization and a non-template
1394 with the same type, or to have specializations of two
1395 different templates with the same type. Note that if one is a
1396 specialization, and the other is an instantiation of the same
1397 template, that we do not exit at this point. That situation
1398 can occur if we instantiate a template class, and then
1399 specialize one of its methods. This situation is valid, but
1400 the declarations must be merged in the usual way. */
1402 else if (TREE_CODE (newdecl) == FUNCTION_DECL
1403 && ((DECL_TEMPLATE_INSTANTIATION (olddecl)
1404 && !DECL_USE_TEMPLATE (newdecl))
1405 || (DECL_TEMPLATE_INSTANTIATION (newdecl)
1406 && !DECL_USE_TEMPLATE (olddecl))))
1407 /* One of the declarations is a template instantiation, and the
1408 other is not a template at all. That's OK. */
1410 else if (TREE_CODE (newdecl) == NAMESPACE_DECL)
1412 /* In [namespace.alias] we have:
1414 In a declarative region, a namespace-alias-definition can be
1415 used to redefine a namespace-alias declared in that declarative
1416 region to refer only to the namespace to which it already
1419 Therefore, if we encounter a second alias directive for the same
1420 alias, we can just ignore the second directive. */
1421 if (DECL_NAMESPACE_ALIAS (newdecl)
1422 && (DECL_NAMESPACE_ALIAS (newdecl)
1423 == DECL_NAMESPACE_ALIAS (olddecl)))
1425 /* [namespace.alias]
1427 A namespace-name or namespace-alias shall not be declared as
1428 the name of any other entity in the same declarative region.
1429 A namespace-name defined at global scope shall not be
1430 declared as the name of any other entity in any global scope
1432 error ("declaration of namespace %qD conflicts with", newdecl);
1433 error ("previous declaration of namespace %q+D here", olddecl);
1434 return error_mark_node;
1438 const char *errmsg = redeclaration_error_message (newdecl, olddecl);
1441 error (errmsg, newdecl);
1442 if (DECL_NAME (olddecl) != NULL_TREE)
1443 error ((DECL_INITIAL (olddecl) && namespace_bindings_p ())
1444 ? "%q+#D previously defined here"
1445 : "%q+#D previously declared here", olddecl);
1446 return error_mark_node;
1448 else if (TREE_CODE (olddecl) == FUNCTION_DECL
1449 && DECL_INITIAL (olddecl) != NULL_TREE
1450 && TYPE_ARG_TYPES (TREE_TYPE (olddecl)) == NULL_TREE
1451 && TYPE_ARG_TYPES (TREE_TYPE (newdecl)) != NULL_TREE)
1453 /* Prototype decl follows defn w/o prototype. */
1454 warning (0, "prototype for %q+#D", newdecl);
1455 warning (0, "%Jfollows non-prototype definition here", olddecl);
1457 else if ((TREE_CODE (olddecl) == FUNCTION_DECL
1458 || TREE_CODE (olddecl) == VAR_DECL)
1459 && DECL_LANGUAGE (newdecl) != DECL_LANGUAGE (olddecl))
1462 If two declarations of the same function or object
1463 specify different linkage-specifications ..., the program
1464 is ill-formed.... Except for functions with C++ linkage,
1465 a function declaration without a linkage specification
1466 shall not precede the first linkage specification for
1467 that function. A function can be declared without a
1468 linkage specification after an explicit linkage
1469 specification has been seen; the linkage explicitly
1470 specified in the earlier declaration is not affected by
1471 such a function declaration.
1473 DR 563 raises the question why the restrictions on
1474 functions should not also apply to objects. Older
1475 versions of G++ silently ignore the linkage-specification
1483 which is clearly wrong. Therefore, we now treat objects
1485 if (current_lang_depth () == 0)
1487 /* There is no explicit linkage-specification, so we use
1488 the linkage from the previous declaration. */
1489 if (!DECL_LANG_SPECIFIC (newdecl))
1490 retrofit_lang_decl (newdecl);
1491 SET_DECL_LANGUAGE (newdecl, DECL_LANGUAGE (olddecl));
1495 error ("previous declaration of %q+#D with %qL linkage",
1496 olddecl, DECL_LANGUAGE (olddecl));
1497 error ("conflicts with new declaration with %qL linkage",
1498 DECL_LANGUAGE (newdecl));
1502 if (DECL_LANG_SPECIFIC (olddecl) && DECL_USE_TEMPLATE (olddecl))
1504 else if (TREE_CODE (olddecl) == FUNCTION_DECL)
1506 tree t1 = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1507 tree t2 = TYPE_ARG_TYPES (TREE_TYPE (newdecl));
1510 if (TREE_CODE (TREE_TYPE (newdecl)) == METHOD_TYPE)
1511 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2);
1513 for (; t1 && t1 != void_list_node;
1514 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2), i++)
1515 if (TREE_PURPOSE (t1) && TREE_PURPOSE (t2))
1517 if (1 == simple_cst_equal (TREE_PURPOSE (t1),
1520 pedwarn ("default argument given for parameter %d of %q#D",
1522 pedwarn ("after previous specification in %q+#D", olddecl);
1526 error ("default argument given for parameter %d of %q#D",
1528 error ("after previous specification in %q+#D",
1533 if (DECL_DECLARED_INLINE_P (newdecl)
1534 && ! DECL_DECLARED_INLINE_P (olddecl)
1535 && TREE_ADDRESSABLE (olddecl) && warn_inline)
1537 warning (0, "%q#D was used before it was declared inline", newdecl);
1538 warning (0, "%Jprevious non-inline declaration here", olddecl);
1543 /* Do not merge an implicit typedef with an explicit one. In:
1547 typedef class A A __attribute__ ((foo));
1549 the attribute should apply only to the typedef. */
1550 if (TREE_CODE (olddecl) == TYPE_DECL
1551 && (DECL_IMPLICIT_TYPEDEF_P (olddecl)
1552 || DECL_IMPLICIT_TYPEDEF_P (newdecl)))
1555 /* If new decl is `static' and an `extern' was seen previously,
1557 warn_extern_redeclared_static (newdecl, olddecl);
1559 /* We have committed to returning 1 at this point. */
1560 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1562 /* Now that functions must hold information normally held
1563 by field decls, there is extra work to do so that
1564 declaration information does not get destroyed during
1566 if (DECL_VINDEX (olddecl))
1567 DECL_VINDEX (newdecl) = DECL_VINDEX (olddecl);
1568 if (DECL_CONTEXT (olddecl))
1569 DECL_CONTEXT (newdecl) = DECL_CONTEXT (olddecl);
1570 DECL_STATIC_CONSTRUCTOR (newdecl) |= DECL_STATIC_CONSTRUCTOR (olddecl);
1571 DECL_STATIC_DESTRUCTOR (newdecl) |= DECL_STATIC_DESTRUCTOR (olddecl);
1572 DECL_PURE_VIRTUAL_P (newdecl) |= DECL_PURE_VIRTUAL_P (olddecl);
1573 DECL_VIRTUAL_P (newdecl) |= DECL_VIRTUAL_P (olddecl);
1574 DECL_THIS_STATIC (newdecl) |= DECL_THIS_STATIC (olddecl);
1575 if (DECL_OVERLOADED_OPERATOR_P (olddecl) != ERROR_MARK)
1576 SET_OVERLOADED_OPERATOR_CODE
1577 (newdecl, DECL_OVERLOADED_OPERATOR_P (olddecl));
1578 new_defines_function = DECL_INITIAL (newdecl) != NULL_TREE;
1580 /* Optionally warn about more than one declaration for the same
1581 name, but don't warn about a function declaration followed by a
1583 if (warn_redundant_decls && ! DECL_ARTIFICIAL (olddecl)
1584 && !(new_defines_function && DECL_INITIAL (olddecl) == NULL_TREE)
1585 /* Don't warn about extern decl followed by definition. */
1586 && !(DECL_EXTERNAL (olddecl) && ! DECL_EXTERNAL (newdecl))
1587 /* Don't warn about friends, let add_friend take care of it. */
1588 && ! (newdecl_is_friend || DECL_FRIEND_P (olddecl)))
1590 warning (OPT_Wredundant_decls, "redundant redeclaration of %qD in same scope", newdecl);
1591 warning (OPT_Wredundant_decls, "previous declaration of %q+D", olddecl);
1595 /* Deal with C++: must preserve virtual function table size. */
1596 if (TREE_CODE (olddecl) == TYPE_DECL)
1598 tree newtype = TREE_TYPE (newdecl);
1599 tree oldtype = TREE_TYPE (olddecl);
1601 if (newtype != error_mark_node && oldtype != error_mark_node
1602 && TYPE_LANG_SPECIFIC (newtype) && TYPE_LANG_SPECIFIC (oldtype))
1603 CLASSTYPE_FRIEND_CLASSES (newtype)
1604 = CLASSTYPE_FRIEND_CLASSES (oldtype);
1606 DECL_ORIGINAL_TYPE (newdecl) = DECL_ORIGINAL_TYPE (olddecl);
1609 /* Copy all the DECL_... slots specified in the new decl
1610 except for any that we copy here from the old type. */
1611 DECL_ATTRIBUTES (newdecl)
1612 = (*targetm.merge_decl_attributes) (olddecl, newdecl);
1614 if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1618 old_result = DECL_TEMPLATE_RESULT (olddecl);
1619 new_result = DECL_TEMPLATE_RESULT (newdecl);
1620 TREE_TYPE (olddecl) = TREE_TYPE (old_result);
1621 DECL_TEMPLATE_SPECIALIZATIONS (olddecl)
1622 = chainon (DECL_TEMPLATE_SPECIALIZATIONS (olddecl),
1623 DECL_TEMPLATE_SPECIALIZATIONS (newdecl));
1625 if (DECL_FUNCTION_TEMPLATE_P (newdecl))
1627 DECL_INLINE (old_result)
1628 |= DECL_INLINE (new_result);
1629 DECL_DECLARED_INLINE_P (old_result)
1630 |= DECL_DECLARED_INLINE_P (new_result);
1631 check_redeclaration_exception_specification (newdecl, olddecl);
1634 /* If the new declaration is a definition, update the file and
1635 line information on the declaration. */
1636 if (DECL_INITIAL (old_result) == NULL_TREE
1637 && DECL_INITIAL (new_result) != NULL_TREE)
1639 DECL_SOURCE_LOCATION (olddecl)
1640 = DECL_SOURCE_LOCATION (old_result)
1641 = DECL_SOURCE_LOCATION (newdecl);
1642 if (DECL_FUNCTION_TEMPLATE_P (newdecl))
1643 DECL_ARGUMENTS (old_result)
1644 = DECL_ARGUMENTS (new_result);
1652 /* Automatically handles default parameters. */
1653 tree oldtype = TREE_TYPE (olddecl);
1656 /* Merge the data types specified in the two decls. */
1657 newtype = merge_types (TREE_TYPE (newdecl), TREE_TYPE (olddecl));
1659 /* If merge_types produces a non-typedef type, just use the old type. */
1660 if (TREE_CODE (newdecl) == TYPE_DECL
1661 && newtype == DECL_ORIGINAL_TYPE (newdecl))
1664 if (TREE_CODE (newdecl) == VAR_DECL)
1666 DECL_THIS_EXTERN (newdecl) |= DECL_THIS_EXTERN (olddecl);
1667 DECL_INITIALIZED_P (newdecl) |= DECL_INITIALIZED_P (olddecl);
1668 DECL_NONTRIVIALLY_INITIALIZED_P (newdecl)
1669 |= DECL_NONTRIVIALLY_INITIALIZED_P (olddecl);
1670 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (newdecl)
1671 |= DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (olddecl);
1673 /* Merge the threadprivate attribute from OLDDECL into NEWDECL. */
1674 if (DECL_LANG_SPECIFIC (olddecl)
1675 && CP_DECL_THREADPRIVATE_P (olddecl))
1677 /* Allocate a LANG_SPECIFIC structure for NEWDECL, if needed. */
1678 if (!DECL_LANG_SPECIFIC (newdecl))
1679 retrofit_lang_decl (newdecl);
1681 DECL_TLS_MODEL (newdecl) = DECL_TLS_MODEL (olddecl);
1682 CP_DECL_THREADPRIVATE_P (newdecl) = 1;
1686 /* Do this after calling `merge_types' so that default
1687 parameters don't confuse us. */
1688 else if (TREE_CODE (newdecl) == FUNCTION_DECL)
1689 check_redeclaration_exception_specification (newdecl, olddecl);
1690 TREE_TYPE (newdecl) = TREE_TYPE (olddecl) = newtype;
1692 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1693 check_default_args (newdecl);
1695 /* Lay the type out, unless already done. */
1696 if (! same_type_p (newtype, oldtype)
1697 && TREE_TYPE (newdecl) != error_mark_node
1698 && !(processing_template_decl && uses_template_parms (newdecl)))
1699 layout_type (TREE_TYPE (newdecl));
1701 if ((TREE_CODE (newdecl) == VAR_DECL
1702 || TREE_CODE (newdecl) == PARM_DECL
1703 || TREE_CODE (newdecl) == RESULT_DECL
1704 || TREE_CODE (newdecl) == FIELD_DECL
1705 || TREE_CODE (newdecl) == TYPE_DECL)
1706 && !(processing_template_decl && uses_template_parms (newdecl)))
1707 layout_decl (newdecl, 0);
1709 /* Merge the type qualifiers. */
1710 if (TREE_READONLY (newdecl))
1711 TREE_READONLY (olddecl) = 1;
1712 if (TREE_THIS_VOLATILE (newdecl))
1713 TREE_THIS_VOLATILE (olddecl) = 1;
1714 if (TREE_NOTHROW (newdecl))
1715 TREE_NOTHROW (olddecl) = 1;
1717 /* Merge deprecatedness. */
1718 if (TREE_DEPRECATED (newdecl))
1719 TREE_DEPRECATED (olddecl) = 1;
1721 /* Merge the initialization information. */
1722 if (DECL_INITIAL (newdecl) == NULL_TREE
1723 && DECL_INITIAL (olddecl) != NULL_TREE)
1725 DECL_INITIAL (newdecl) = DECL_INITIAL (olddecl);
1726 DECL_SOURCE_LOCATION (newdecl) = DECL_SOURCE_LOCATION (olddecl);
1727 if (CAN_HAVE_FULL_LANG_DECL_P (newdecl)
1728 && DECL_LANG_SPECIFIC (newdecl)
1729 && DECL_LANG_SPECIFIC (olddecl))
1731 DECL_SAVED_TREE (newdecl) = DECL_SAVED_TREE (olddecl);
1732 DECL_STRUCT_FUNCTION (newdecl) = DECL_STRUCT_FUNCTION (olddecl);
1736 /* Merge the section attribute.
1737 We want to issue an error if the sections conflict but that must be
1738 done later in decl_attributes since we are called before attributes
1740 if (DECL_SECTION_NAME (newdecl) == NULL_TREE)
1741 DECL_SECTION_NAME (newdecl) = DECL_SECTION_NAME (olddecl);
1743 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1745 DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (newdecl)
1746 |= DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (olddecl);
1747 DECL_NO_LIMIT_STACK (newdecl) |= DECL_NO_LIMIT_STACK (olddecl);
1748 TREE_THIS_VOLATILE (newdecl) |= TREE_THIS_VOLATILE (olddecl);
1749 TREE_READONLY (newdecl) |= TREE_READONLY (olddecl);
1750 TREE_NOTHROW (newdecl) |= TREE_NOTHROW (olddecl);
1751 DECL_IS_MALLOC (newdecl) |= DECL_IS_MALLOC (olddecl);
1752 DECL_IS_PURE (newdecl) |= DECL_IS_PURE (olddecl);
1753 /* Keep the old RTL. */
1754 COPY_DECL_RTL (olddecl, newdecl);
1756 else if (TREE_CODE (newdecl) == VAR_DECL
1757 && (DECL_SIZE (olddecl) || !DECL_SIZE (newdecl)))
1759 /* Keep the old RTL. We cannot keep the old RTL if the old
1760 declaration was for an incomplete object and the new
1761 declaration is not since many attributes of the RTL will
1763 COPY_DECL_RTL (olddecl, newdecl);
1766 /* If cannot merge, then use the new type and qualifiers,
1767 and don't preserve the old rtl. */
1770 /* Clean out any memory we had of the old declaration. */
1771 tree oldstatic = value_member (olddecl, static_aggregates);
1773 TREE_VALUE (oldstatic) = error_mark_node;
1775 TREE_TYPE (olddecl) = TREE_TYPE (newdecl);
1776 TREE_READONLY (olddecl) = TREE_READONLY (newdecl);
1777 TREE_THIS_VOLATILE (olddecl) = TREE_THIS_VOLATILE (newdecl);
1778 TREE_SIDE_EFFECTS (olddecl) = TREE_SIDE_EFFECTS (newdecl);
1781 /* Merge the storage class information. */
1782 merge_weak (newdecl, olddecl);
1784 DECL_ONE_ONLY (newdecl) |= DECL_ONE_ONLY (olddecl);
1785 DECL_DEFER_OUTPUT (newdecl) |= DECL_DEFER_OUTPUT (olddecl);
1786 TREE_PUBLIC (newdecl) = TREE_PUBLIC (olddecl);
1787 TREE_STATIC (olddecl) = TREE_STATIC (newdecl) |= TREE_STATIC (olddecl);
1788 if (! DECL_EXTERNAL (olddecl))
1789 DECL_EXTERNAL (newdecl) = 0;
1791 new_template = NULL_TREE;
1792 if (DECL_LANG_SPECIFIC (newdecl) && DECL_LANG_SPECIFIC (olddecl))
1794 DECL_INTERFACE_KNOWN (newdecl) |= DECL_INTERFACE_KNOWN (olddecl);
1795 DECL_NOT_REALLY_EXTERN (newdecl) |= DECL_NOT_REALLY_EXTERN (olddecl);
1796 DECL_COMDAT (newdecl) |= DECL_COMDAT (olddecl);
1797 DECL_TEMPLATE_INSTANTIATED (newdecl)
1798 |= DECL_TEMPLATE_INSTANTIATED (olddecl);
1800 /* If the OLDDECL is an instantiation and/or specialization,
1801 then the NEWDECL must be too. But, it may not yet be marked
1802 as such if the caller has created NEWDECL, but has not yet
1803 figured out that it is a redeclaration. */
1804 if (!DECL_USE_TEMPLATE (newdecl))
1805 DECL_USE_TEMPLATE (newdecl) = DECL_USE_TEMPLATE (olddecl);
1807 /* Don't really know how much of the language-specific
1808 values we should copy from old to new. */
1809 DECL_IN_AGGR_P (newdecl) = DECL_IN_AGGR_P (olddecl);
1810 DECL_LANG_SPECIFIC (newdecl)->decl_flags.u2 =
1811 DECL_LANG_SPECIFIC (olddecl)->decl_flags.u2;
1812 DECL_NONCONVERTING_P (newdecl) = DECL_NONCONVERTING_P (olddecl);
1813 DECL_REPO_AVAILABLE_P (newdecl) = DECL_REPO_AVAILABLE_P (olddecl);
1814 if (DECL_TEMPLATE_INFO (newdecl))
1815 new_template = DECL_TI_TEMPLATE (newdecl);
1816 DECL_TEMPLATE_INFO (newdecl) = DECL_TEMPLATE_INFO (olddecl);
1817 DECL_INITIALIZED_IN_CLASS_P (newdecl)
1818 |= DECL_INITIALIZED_IN_CLASS_P (olddecl);
1819 olddecl_friend = DECL_FRIEND_P (olddecl);
1820 hidden_friend = (DECL_ANTICIPATED (olddecl)
1821 && DECL_HIDDEN_FRIEND_P (olddecl)
1822 && newdecl_is_friend);
1824 /* Only functions have DECL_BEFRIENDING_CLASSES. */
1825 if (TREE_CODE (newdecl) == FUNCTION_DECL
1826 || DECL_FUNCTION_TEMPLATE_P (newdecl))
1828 DECL_BEFRIENDING_CLASSES (newdecl)
1829 = chainon (DECL_BEFRIENDING_CLASSES (newdecl),
1830 DECL_BEFRIENDING_CLASSES (olddecl));
1831 /* DECL_THUNKS is only valid for virtual functions,
1832 otherwise it is a DECL_FRIEND_CONTEXT. */
1833 if (DECL_VIRTUAL_P (newdecl))
1834 DECL_THUNKS (newdecl) = DECL_THUNKS (olddecl);
1838 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1840 if (DECL_TEMPLATE_INSTANTIATION (olddecl)
1841 && !DECL_TEMPLATE_INSTANTIATION (newdecl))
1843 /* If newdecl is not a specialization, then it is not a
1844 template-related function at all. And that means that we
1845 should have exited above, returning 0. */
1846 gcc_assert (DECL_TEMPLATE_SPECIALIZATION (newdecl));
1848 if (TREE_USED (olddecl))
1849 /* From [temp.expl.spec]:
1851 If a template, a member template or the member of a class
1852 template is explicitly specialized then that
1853 specialization shall be declared before the first use of
1854 that specialization that would cause an implicit
1855 instantiation to take place, in every translation unit in
1856 which such a use occurs. */
1857 error ("explicit specialization of %qD after first use",
1860 SET_DECL_TEMPLATE_SPECIALIZATION (olddecl);
1862 /* Don't propagate visibility from the template to the
1863 specialization here. We'll do that in determine_visibility if
1865 DECL_VISIBILITY_SPECIFIED (olddecl) = 0;
1867 /* [temp.expl.spec/14] We don't inline explicit specialization
1868 just because the primary template says so. */
1872 if (DECL_PENDING_INLINE_INFO (newdecl) == 0)
1873 DECL_PENDING_INLINE_INFO (newdecl) = DECL_PENDING_INLINE_INFO (olddecl);
1875 DECL_DECLARED_INLINE_P (newdecl) |= DECL_DECLARED_INLINE_P (olddecl);
1877 /* If either decl says `inline', this fn is inline, unless
1878 its definition was passed already. */
1879 if (DECL_INLINE (newdecl) && DECL_INITIAL (olddecl) == NULL_TREE)
1880 DECL_INLINE (olddecl) = 1;
1881 DECL_INLINE (newdecl) = DECL_INLINE (olddecl);
1883 DECL_UNINLINABLE (newdecl) = DECL_UNINLINABLE (olddecl)
1884 = (DECL_UNINLINABLE (newdecl) || DECL_UNINLINABLE (olddecl));
1887 /* Preserve abstractness on cloned [cd]tors. */
1888 DECL_ABSTRACT (newdecl) = DECL_ABSTRACT (olddecl);
1892 SET_DECL_LANGUAGE (olddecl, DECL_LANGUAGE (newdecl));
1893 COPY_DECL_ASSEMBLER_NAME (newdecl, olddecl);
1894 COPY_DECL_RTL (newdecl, olddecl);
1896 if (! types_match || new_defines_function)
1898 /* These need to be copied so that the names are available.
1899 Note that if the types do match, we'll preserve inline
1900 info and other bits, but if not, we won't. */
1901 DECL_ARGUMENTS (olddecl) = DECL_ARGUMENTS (newdecl);
1902 DECL_RESULT (olddecl) = DECL_RESULT (newdecl);
1904 if (new_defines_function)
1905 /* If defining a function declared with other language
1906 linkage, use the previously declared language linkage. */
1907 SET_DECL_LANGUAGE (newdecl, DECL_LANGUAGE (olddecl));
1908 else if (types_match)
1910 /* If redeclaring a builtin function, and not a definition,
1911 it stays built in. */
1912 if (DECL_BUILT_IN (olddecl))
1914 DECL_BUILT_IN_CLASS (newdecl) = DECL_BUILT_IN_CLASS (olddecl);
1915 DECL_FUNCTION_CODE (newdecl) = DECL_FUNCTION_CODE (olddecl);
1916 /* If we're keeping the built-in definition, keep the rtl,
1917 regardless of declaration matches. */
1918 COPY_DECL_RTL (olddecl, newdecl);
1921 DECL_RESULT (newdecl) = DECL_RESULT (olddecl);
1922 /* Don't clear out the arguments if we're redefining a function. */
1923 if (DECL_ARGUMENTS (olddecl))
1924 DECL_ARGUMENTS (newdecl) = DECL_ARGUMENTS (olddecl);
1927 else if (TREE_CODE (newdecl) == NAMESPACE_DECL)
1928 NAMESPACE_LEVEL (newdecl) = NAMESPACE_LEVEL (olddecl);
1930 /* Now preserve various other info from the definition. */
1931 TREE_ADDRESSABLE (newdecl) = TREE_ADDRESSABLE (olddecl);
1932 TREE_ASM_WRITTEN (newdecl) = TREE_ASM_WRITTEN (olddecl);
1933 DECL_COMMON (newdecl) = DECL_COMMON (olddecl);
1934 COPY_DECL_ASSEMBLER_NAME (olddecl, newdecl);
1936 /* Warn about conflicting visibility specifications. */
1937 if (DECL_VISIBILITY_SPECIFIED (olddecl)
1938 && DECL_VISIBILITY_SPECIFIED (newdecl)
1939 && DECL_VISIBILITY (newdecl) != DECL_VISIBILITY (olddecl))
1941 warning (OPT_Wattributes, "%q+D: visibility attribute ignored "
1942 "because it", newdecl);
1943 warning (OPT_Wattributes, "%Jconflicts with previous "
1944 "declaration here", olddecl);
1946 /* Choose the declaration which specified visibility. */
1947 if (DECL_VISIBILITY_SPECIFIED (olddecl))
1949 DECL_VISIBILITY (newdecl) = DECL_VISIBILITY (olddecl);
1950 DECL_VISIBILITY_SPECIFIED (newdecl) = 1;
1952 /* Init priority used to be merged from newdecl to olddecl by the memcpy,
1953 so keep this behavior. */
1954 if (TREE_CODE (newdecl) == VAR_DECL && DECL_HAS_INIT_PRIORITY_P (newdecl))
1956 SET_DECL_INIT_PRIORITY (olddecl, DECL_INIT_PRIORITY (newdecl));
1957 DECL_HAS_INIT_PRIORITY_P (olddecl) = 1;
1960 /* The DECL_LANG_SPECIFIC information in OLDDECL will be replaced
1961 with that from NEWDECL below. */
1962 if (DECL_LANG_SPECIFIC (olddecl))
1964 gcc_assert (DECL_LANG_SPECIFIC (olddecl)
1965 != DECL_LANG_SPECIFIC (newdecl));
1966 ggc_free (DECL_LANG_SPECIFIC (olddecl));
1969 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1973 function_size = sizeof (struct tree_decl_common);
1975 memcpy ((char *) olddecl + sizeof (struct tree_common),
1976 (char *) newdecl + sizeof (struct tree_common),
1977 function_size - sizeof (struct tree_common));
1979 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
1980 (char *) newdecl + sizeof (struct tree_decl_common),
1981 sizeof (struct tree_function_decl) - sizeof (struct tree_decl_common));
1983 /* If newdecl is a template instantiation, it is possible that
1984 the following sequence of events has occurred:
1986 o A friend function was declared in a class template. The
1987 class template was instantiated.
1989 o The instantiation of the friend declaration was
1990 recorded on the instantiation list, and is newdecl.
1992 o Later, however, instantiate_class_template called pushdecl
1993 on the newdecl to perform name injection. But, pushdecl in
1994 turn called duplicate_decls when it discovered that another
1995 declaration of a global function with the same name already
1998 o Here, in duplicate_decls, we decided to clobber newdecl.
2000 If we're going to do that, we'd better make sure that
2001 olddecl, and not newdecl, is on the list of
2002 instantiations so that if we try to do the instantiation
2003 again we won't get the clobbered declaration. */
2004 reregister_specialization (newdecl,
2010 size_t size = tree_code_size (TREE_CODE (olddecl));
2011 memcpy ((char *) olddecl + sizeof (struct tree_common),
2012 (char *) newdecl + sizeof (struct tree_common),
2013 sizeof (struct tree_decl_common) - sizeof (struct tree_common));
2014 switch (TREE_CODE (olddecl))
2024 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
2025 (char *) newdecl + sizeof (struct tree_decl_common),
2026 size - sizeof (struct tree_decl_common)
2027 + TREE_CODE_LENGTH (TREE_CODE (newdecl)) * sizeof (char *));
2031 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
2032 (char *) newdecl + sizeof (struct tree_decl_common),
2033 sizeof (struct tree_decl_non_common) - sizeof (struct tree_decl_common)
2034 + TREE_CODE_LENGTH (TREE_CODE (newdecl)) * sizeof (char *));
2038 DECL_UID (olddecl) = olddecl_uid;
2040 DECL_FRIEND_P (olddecl) = 1;
2043 DECL_ANTICIPATED (olddecl) = 1;
2044 DECL_HIDDEN_FRIEND_P (olddecl) = 1;
2047 /* NEWDECL contains the merged attribute lists.
2048 Update OLDDECL to be the same. */
2049 DECL_ATTRIBUTES (olddecl) = DECL_ATTRIBUTES (newdecl);
2051 /* If OLDDECL had its DECL_RTL instantiated, re-invoke make_decl_rtl
2052 so that encode_section_info has a chance to look at the new decl
2053 flags and attributes. */
2054 if (DECL_RTL_SET_P (olddecl)
2055 && (TREE_CODE (olddecl) == FUNCTION_DECL
2056 || (TREE_CODE (olddecl) == VAR_DECL
2057 && TREE_STATIC (olddecl))))
2058 make_decl_rtl (olddecl);
2060 /* The NEWDECL will no longer be needed. Because every out-of-class
2061 declaration of a member results in a call to duplicate_decls,
2062 freeing these nodes represents in a significant savings. */
2068 /* Return zero if the declaration NEWDECL is valid
2069 when the declaration OLDDECL (assumed to be for the same name)
2070 has already been seen.
2071 Otherwise return an error message format string with a %s
2072 where the identifier should go. */
2075 redeclaration_error_message (tree newdecl, tree olddecl)
2077 if (TREE_CODE (newdecl) == TYPE_DECL)
2079 /* Because C++ can put things into name space for free,
2080 constructs like "typedef struct foo { ... } foo"
2081 would look like an erroneous redeclaration. */
2082 if (same_type_p (TREE_TYPE (newdecl), TREE_TYPE (olddecl)))
2085 return "redefinition of %q#D";
2087 else if (TREE_CODE (newdecl) == FUNCTION_DECL)
2089 /* If this is a pure function, its olddecl will actually be
2090 the original initialization to `0' (which we force to call
2091 abort()). Don't complain about redefinition in this case. */
2092 if (DECL_LANG_SPECIFIC (olddecl) && DECL_PURE_VIRTUAL_P (olddecl)
2093 && DECL_INITIAL (olddecl) == NULL_TREE)
2096 /* If both functions come from different namespaces, this is not
2097 a redeclaration - this is a conflict with a used function. */
2098 if (DECL_NAMESPACE_SCOPE_P (olddecl)
2099 && DECL_CONTEXT (olddecl) != DECL_CONTEXT (newdecl)
2100 && ! decls_match (olddecl, newdecl))
2101 return "%qD conflicts with used function";
2103 /* We'll complain about linkage mismatches in
2104 warn_extern_redeclared_static. */
2106 /* Defining the same name twice is no good. */
2107 if (DECL_INITIAL (olddecl) != NULL_TREE
2108 && DECL_INITIAL (newdecl) != NULL_TREE)
2110 if (DECL_NAME (olddecl) == NULL_TREE)
2111 return "%q#D not declared in class";
2113 return "redefinition of %q#D";
2117 else if (TREE_CODE (newdecl) == TEMPLATE_DECL)
2121 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
2123 if (COMPLETE_TYPE_P (TREE_TYPE (newdecl))
2124 && COMPLETE_TYPE_P (TREE_TYPE (olddecl)))
2125 return "redefinition of %q#D";
2129 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) != FUNCTION_DECL
2130 || (DECL_TEMPLATE_RESULT (newdecl)
2131 == DECL_TEMPLATE_RESULT (olddecl)))
2134 nt = DECL_TEMPLATE_RESULT (newdecl);
2135 if (DECL_TEMPLATE_INFO (nt))
2136 nt = DECL_TEMPLATE_RESULT (template_for_substitution (nt));
2137 ot = DECL_TEMPLATE_RESULT (olddecl);
2138 if (DECL_TEMPLATE_INFO (ot))
2139 ot = DECL_TEMPLATE_RESULT (template_for_substitution (ot));
2140 if (DECL_INITIAL (nt) && DECL_INITIAL (ot))
2141 return "redefinition of %q#D";
2145 else if (TREE_CODE (newdecl) == VAR_DECL
2146 && DECL_THREAD_LOCAL_P (newdecl) != DECL_THREAD_LOCAL_P (olddecl)
2147 && (! DECL_LANG_SPECIFIC (olddecl)
2148 || ! CP_DECL_THREADPRIVATE_P (olddecl)
2149 || DECL_THREAD_LOCAL_P (newdecl)))
2151 /* Only variables can be thread-local, and all declarations must
2152 agree on this property. */
2153 if (DECL_THREAD_LOCAL_P (newdecl))
2154 return "thread-local declaration of %q#D follows "
2155 "non-thread-local declaration";
2157 return "non-thread-local declaration of %q#D follows "
2158 "thread-local declaration";
2160 else if (toplevel_bindings_p () || DECL_NAMESPACE_SCOPE_P (newdecl))
2162 /* Objects declared at top level: */
2163 /* If at least one is a reference, it's ok. */
2164 if (DECL_EXTERNAL (newdecl) || DECL_EXTERNAL (olddecl))
2166 /* Reject two definitions. */
2167 return "redefinition of %q#D";
2171 /* Objects declared with block scope: */
2172 /* Reject two definitions, and reject a definition
2173 together with an external reference. */
2174 if (!(DECL_EXTERNAL (newdecl) && DECL_EXTERNAL (olddecl)))
2175 return "redeclaration of %q#D";
2180 /* Hash and equality functions for the named_label table. */
2183 named_label_entry_hash (const void *data)
2185 const struct named_label_entry *ent = (const struct named_label_entry *) data;
2186 return DECL_UID (ent->label_decl);
2190 named_label_entry_eq (const void *a, const void *b)
2192 const struct named_label_entry *ent_a = (const struct named_label_entry *) a;
2193 const struct named_label_entry *ent_b = (const struct named_label_entry *) b;
2194 return ent_a->label_decl == ent_b->label_decl;
2197 /* Create a new label, named ID. */
2200 make_label_decl (tree id, int local_p)
2202 struct named_label_entry *ent;
2206 decl = build_decl (LABEL_DECL, id, void_type_node);
2208 DECL_CONTEXT (decl) = current_function_decl;
2209 DECL_MODE (decl) = VOIDmode;
2210 C_DECLARED_LABEL_FLAG (decl) = local_p;
2212 /* Say where one reference is to the label, for the sake of the
2213 error if it is not defined. */
2214 DECL_SOURCE_LOCATION (decl) = input_location;
2216 /* Record the fact that this identifier is bound to this label. */
2217 SET_IDENTIFIER_LABEL_VALUE (id, decl);
2219 /* Create the label htab for the function on demand. */
2221 named_labels = htab_create_ggc (13, named_label_entry_hash,
2222 named_label_entry_eq, NULL);
2224 /* Record this label on the list of labels used in this function.
2225 We do this before calling make_label_decl so that we get the
2226 IDENTIFIER_LABEL_VALUE before the new label is declared. */
2227 ent = GGC_CNEW (struct named_label_entry);
2228 ent->label_decl = decl;
2230 slot = htab_find_slot (named_labels, ent, INSERT);
2231 gcc_assert (*slot == NULL);
2237 /* Look for a label named ID in the current function. If one cannot
2238 be found, create one. (We keep track of used, but undefined,
2239 labels, and complain about them at the end of a function.) */
2242 lookup_label (tree id)
2246 timevar_push (TV_NAME_LOOKUP);
2247 /* You can't use labels at global scope. */
2248 if (current_function_decl == NULL_TREE)
2250 error ("label %qE referenced outside of any function", id);
2251 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, NULL_TREE);
2254 /* See if we've already got this label. */
2255 decl = IDENTIFIER_LABEL_VALUE (id);
2256 if (decl != NULL_TREE && DECL_CONTEXT (decl) == current_function_decl)
2257 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2259 decl = make_label_decl (id, /*local_p=*/0);
2260 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2263 /* Declare a local label named ID. */
2266 declare_local_label (tree id)
2270 /* Add a new entry to the SHADOWED_LABELS list so that when we leave
2271 this scope we can restore the old value of IDENTIFIER_TYPE_VALUE. */
2272 shadow = tree_cons (IDENTIFIER_LABEL_VALUE (id), NULL_TREE,
2273 current_binding_level->shadowed_labels);
2274 current_binding_level->shadowed_labels = shadow;
2276 decl = make_label_decl (id, /*local_p=*/1);
2277 TREE_VALUE (shadow) = decl;
2282 /* Returns nonzero if it is ill-formed to jump past the declaration of
2283 DECL. Returns 2 if it's also a real problem. */
2286 decl_jump_unsafe (tree decl)
2288 if (TREE_CODE (decl) != VAR_DECL || TREE_STATIC (decl)
2289 || TREE_TYPE (decl) == error_mark_node)
2292 if (TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl))
2293 || DECL_NONTRIVIALLY_INITIALIZED_P (decl))
2296 if (pod_type_p (TREE_TYPE (decl)))
2299 /* The POD stuff is just pedantry; why should it matter if the class
2300 contains a field of pointer to member type? */
2304 /* A subroutine of check_previous_goto_1 to identify a branch to the user. */
2307 identify_goto (tree decl, const location_t *locus)
2310 pedwarn ("jump to label %qD", decl);
2312 pedwarn ("jump to case label");
2314 pedwarn ("%H from here", locus);
2317 /* Check that a single previously seen jump to a newly defined label
2318 is OK. DECL is the LABEL_DECL or 0; LEVEL is the binding_level for
2319 the jump context; NAMES are the names in scope in LEVEL at the jump
2320 context; LOCUS is the source position of the jump or 0. Returns
2321 true if all is well. */
2324 check_previous_goto_1 (tree decl, struct cp_binding_level* level, tree names,
2325 bool exited_omp, const location_t *locus)
2327 struct cp_binding_level *b;
2328 bool identified = false, saw_eh = false, saw_omp = false;
2332 identify_goto (decl, locus);
2333 error (" exits OpenMP structured block");
2334 identified = saw_omp = true;
2337 for (b = current_binding_level; b ; b = b->level_chain)
2339 tree new_decls, old_decls = (b == level ? names : NULL_TREE);
2341 for (new_decls = b->names; new_decls != old_decls;
2342 new_decls = TREE_CHAIN (new_decls))
2344 int problem = decl_jump_unsafe (new_decls);
2350 identify_goto (decl, locus);
2354 error (" crosses initialization of %q+#D", new_decls);
2356 pedwarn (" enters scope of non-POD %q+#D", new_decls);
2361 if ((b->kind == sk_try || b->kind == sk_catch) && !saw_eh)
2365 identify_goto (decl, locus);
2368 if (b->kind == sk_try)
2369 error (" enters try block");
2371 error (" enters catch block");
2374 if (b->kind == sk_omp && !saw_omp)
2378 identify_goto (decl, locus);
2381 error (" enters OpenMP structured block");
2390 check_previous_goto (tree decl, struct named_label_use_entry *use)
2392 check_previous_goto_1 (decl, use->binding_level,
2393 use->names_in_scope, use->in_omp_scope,
2394 &use->o_goto_locus);
2398 check_switch_goto (struct cp_binding_level* level)
2400 return check_previous_goto_1 (NULL_TREE, level, level->names, false, NULL);
2403 /* Check that a new jump to a label DECL is OK. Called by
2404 finish_goto_stmt. */
2407 check_goto (tree decl)
2409 struct named_label_entry *ent, dummy;
2410 bool saw_catch = false, identified = false;
2413 /* We can't know where a computed goto is jumping.
2414 So we assume that it's OK. */
2415 if (TREE_CODE (decl) != LABEL_DECL)
2418 /* We didn't record any information about this label when we created it,
2419 and there's not much point since it's trivial to analyze as a return. */
2420 if (decl == cdtor_label)
2423 dummy.label_decl = decl;
2424 ent = (struct named_label_entry *) htab_find (named_labels, &dummy);
2425 gcc_assert (ent != NULL);
2427 /* If the label hasn't been defined yet, defer checking. */
2428 if (! DECL_INITIAL (decl))
2430 struct named_label_use_entry *new_use;
2432 /* Don't bother creating another use if the last goto had the
2433 same data, and will therefore create the same set of errors. */
2435 && ent->uses->names_in_scope == current_binding_level->names)
2438 new_use = GGC_NEW (struct named_label_use_entry);
2439 new_use->binding_level = current_binding_level;
2440 new_use->names_in_scope = current_binding_level->names;
2441 new_use->o_goto_locus = input_location;
2442 new_use->in_omp_scope = false;
2444 new_use->next = ent->uses;
2445 ent->uses = new_use;
2449 if (ent->in_try_scope || ent->in_catch_scope
2450 || ent->in_omp_scope || ent->bad_decls)
2452 pedwarn ("jump to label %q+D", decl);
2453 pedwarn (" from here");
2457 for (bad = ent->bad_decls; bad; bad = TREE_CHAIN (bad))
2459 tree b = TREE_VALUE (bad);
2460 int u = decl_jump_unsafe (b);
2462 if (u > 1 && DECL_ARTIFICIAL (b))
2464 /* Can't skip init of __exception_info. */
2465 error ("%J enters catch block", b);
2469 error (" skips initialization of %q+#D", b);
2471 pedwarn (" enters scope of non-POD %q+#D", b);
2474 if (ent->in_try_scope)
2475 error (" enters try block");
2476 else if (ent->in_catch_scope && !saw_catch)
2477 error (" enters catch block");
2479 if (ent->in_omp_scope)
2480 error (" enters OpenMP structured block");
2481 else if (flag_openmp)
2483 struct cp_binding_level *b;
2484 for (b = current_binding_level; b ; b = b->level_chain)
2486 if (b == ent->binding_level)
2488 if (b->kind == sk_omp)
2492 pedwarn ("jump to label %q+D", decl);
2493 pedwarn (" from here");
2496 error (" exits OpenMP structured block");
2503 /* Check that a return is ok wrt OpenMP structured blocks.
2504 Called by finish_return_stmt. Returns true if all is well. */
2507 check_omp_return (void)
2509 struct cp_binding_level *b;
2510 for (b = current_binding_level; b ; b = b->level_chain)
2511 if (b->kind == sk_omp)
2513 error ("invalid exit from OpenMP structured block");
2519 /* Define a label, specifying the location in the source file.
2520 Return the LABEL_DECL node for the label. */
2523 define_label (location_t location, tree name)
2525 struct named_label_entry *ent, dummy;
2526 struct cp_binding_level *p;
2529 timevar_push (TV_NAME_LOOKUP);
2531 decl = lookup_label (name);
2533 dummy.label_decl = decl;
2534 ent = (struct named_label_entry *) htab_find (named_labels, &dummy);
2535 gcc_assert (ent != NULL);
2537 /* After labels, make any new cleanups in the function go into their
2538 own new (temporary) binding contour. */
2539 for (p = current_binding_level;
2540 p->kind != sk_function_parms;
2542 p->more_cleanups_ok = 0;
2544 if (name == get_identifier ("wchar_t"))
2545 pedwarn ("label named wchar_t");
2547 if (DECL_INITIAL (decl) != NULL_TREE)
2549 error ("duplicate label %qD", decl);
2550 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
2554 struct named_label_use_entry *use;
2556 /* Mark label as having been defined. */
2557 DECL_INITIAL (decl) = error_mark_node;
2558 /* Say where in the source. */
2559 DECL_SOURCE_LOCATION (decl) = location;
2561 ent->binding_level = current_binding_level;
2562 ent->names_in_scope = current_binding_level->names;
2564 for (use = ent->uses; use ; use = use->next)
2565 check_previous_goto (decl, use);
2569 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2574 struct cp_binding_level *level;
2575 struct cp_switch *next;
2576 /* The SWITCH_STMT being built. */
2578 /* A splay-tree mapping the low element of a case range to the high
2579 element, or NULL_TREE if there is no high element. Used to
2580 determine whether or not a new case label duplicates an old case
2581 label. We need a tree, rather than simply a hash table, because
2582 of the GNU case range extension. */
2586 /* A stack of the currently active switch statements. The innermost
2587 switch statement is on the top of the stack. There is no need to
2588 mark the stack for garbage collection because it is only active
2589 during the processing of the body of a function, and we never
2590 collect at that point. */
2592 static struct cp_switch *switch_stack;
2594 /* Called right after a switch-statement condition is parsed.
2595 SWITCH_STMT is the switch statement being parsed. */
2598 push_switch (tree switch_stmt)
2600 struct cp_switch *p = XNEW (struct cp_switch);
2601 p->level = current_binding_level;
2602 p->next = switch_stack;
2603 p->switch_stmt = switch_stmt;
2604 p->cases = splay_tree_new (case_compare, NULL, NULL);
2611 struct cp_switch *cs = switch_stack;
2612 location_t switch_location;
2614 /* Emit warnings as needed. */
2615 if (EXPR_HAS_LOCATION (cs->switch_stmt))
2616 switch_location = EXPR_LOCATION (cs->switch_stmt);
2618 switch_location = input_location;
2619 if (!processing_template_decl)
2620 c_do_switch_warnings (cs->cases, switch_location,
2621 SWITCH_STMT_TYPE (cs->switch_stmt),
2622 SWITCH_STMT_COND (cs->switch_stmt));
2624 splay_tree_delete (cs->cases);
2625 switch_stack = switch_stack->next;
2629 /* Note that we've seen a definition of a case label, and complain if this
2630 is a bad place for one. */
2633 finish_case_label (tree low_value, tree high_value)
2636 struct cp_binding_level *p;
2638 if (processing_template_decl)
2642 /* For templates, just add the case label; we'll do semantic
2643 analysis at instantiation-time. */
2644 label = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
2645 return add_stmt (build_case_label (low_value, high_value, label));
2648 /* Find the condition on which this switch statement depends. */
2649 cond = SWITCH_STMT_COND (switch_stack->switch_stmt);
2650 if (cond && TREE_CODE (cond) == TREE_LIST)
2651 cond = TREE_VALUE (cond);
2653 if (!check_switch_goto (switch_stack->level))
2654 return error_mark_node;
2656 r = c_add_case_label (switch_stack->cases, cond, TREE_TYPE (cond),
2657 low_value, high_value);
2659 /* After labels, make any new cleanups in the function go into their
2660 own new (temporary) binding contour. */
2661 for (p = current_binding_level;
2662 p->kind != sk_function_parms;
2664 p->more_cleanups_ok = 0;
2669 /* Hash a TYPENAME_TYPE. K is really of type `tree'. */
2672 typename_hash (const void* k)
2677 hash = (htab_hash_pointer (TYPE_CONTEXT (t))
2678 ^ htab_hash_pointer (DECL_NAME (TYPE_NAME (t))));
2683 typedef struct typename_info {
2691 /* Compare two TYPENAME_TYPEs. K1 and K2 are really of type `tree'. */
2694 typename_compare (const void * k1, const void * k2)
2697 const typename_info *t2;
2700 t2 = (const typename_info *) k2;
2702 return (DECL_NAME (TYPE_NAME (t1)) == t2->name
2703 && TYPE_CONTEXT (t1) == t2->scope
2704 && TYPENAME_TYPE_FULLNAME (t1) == t2->template_id
2705 && TYPENAME_IS_ENUM_P (t1) == t2->enum_p
2706 && TYPENAME_IS_CLASS_P (t1) == t2->class_p);
2709 /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
2710 the type of `T', NAME is the IDENTIFIER_NODE for `t'.
2712 Returns the new TYPENAME_TYPE. */
2714 static GTY ((param_is (union tree_node))) htab_t typename_htab;
2717 build_typename_type (tree context, tree name, tree fullname,
2718 enum tag_types tag_type)
2726 if (typename_htab == NULL)
2727 typename_htab = htab_create_ggc (61, &typename_hash,
2728 &typename_compare, NULL);
2730 ti.scope = FROB_CONTEXT (context);
2732 ti.template_id = fullname;
2733 ti.enum_p = tag_type == enum_type;
2734 ti.class_p = (tag_type == class_type
2735 || tag_type == record_type
2736 || tag_type == union_type);
2737 hash = (htab_hash_pointer (ti.scope)
2738 ^ htab_hash_pointer (ti.name));
2740 /* See if we already have this type. */
2741 e = htab_find_slot_with_hash (typename_htab, &ti, hash, INSERT);
2746 /* Build the TYPENAME_TYPE. */
2747 t = make_aggr_type (TYPENAME_TYPE);
2748 TYPE_CONTEXT (t) = ti.scope;
2749 TYPENAME_TYPE_FULLNAME (t) = ti.template_id;
2750 TYPENAME_IS_ENUM_P (t) = ti.enum_p;
2751 TYPENAME_IS_CLASS_P (t) = ti.class_p;
2753 /* Build the corresponding TYPE_DECL. */
2754 d = build_decl (TYPE_DECL, name, t);
2755 TYPE_NAME (TREE_TYPE (d)) = d;
2756 TYPE_STUB_DECL (TREE_TYPE (d)) = d;
2757 DECL_CONTEXT (d) = FROB_CONTEXT (context);
2758 DECL_ARTIFICIAL (d) = 1;
2760 /* Store it in the hash table. */
2767 /* Resolve `typename CONTEXT::NAME'. TAG_TYPE indicates the tag
2768 provided to name the type. Returns an appropriate type, unless an
2769 error occurs, in which case error_mark_node is returned. If we
2770 locate a non-artificial TYPE_DECL and TF_KEEP_TYPE_DECL is set, we
2771 return that, rather than the _TYPE it corresponds to, in other
2772 cases we look through the type decl. If TF_ERROR is set, complain
2773 about errors, otherwise be quiet. */
2776 make_typename_type (tree context, tree name, enum tag_types tag_type,
2777 tsubst_flags_t complain)
2783 if (name == error_mark_node
2784 || context == NULL_TREE
2785 || context == error_mark_node)
2786 return error_mark_node;
2790 if (!(TYPE_LANG_SPECIFIC (name)
2791 && (CLASSTYPE_IS_TEMPLATE (name)
2792 || CLASSTYPE_USE_TEMPLATE (name))))
2793 name = TYPE_IDENTIFIER (name);
2795 /* Create a TEMPLATE_ID_EXPR for the type. */
2796 name = build_nt (TEMPLATE_ID_EXPR,
2797 CLASSTYPE_TI_TEMPLATE (name),
2798 CLASSTYPE_TI_ARGS (name));
2800 else if (TREE_CODE (name) == TYPE_DECL)
2801 name = DECL_NAME (name);
2805 if (TREE_CODE (name) == TEMPLATE_ID_EXPR)
2807 name = TREE_OPERAND (name, 0);
2808 if (TREE_CODE (name) == TEMPLATE_DECL)
2809 name = TREE_OPERAND (fullname, 0) = DECL_NAME (name);
2811 if (TREE_CODE (name) == TEMPLATE_DECL)
2813 error ("%qD used without template parameters", name);
2814 return error_mark_node;
2816 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
2817 gcc_assert (TYPE_P (context));
2819 /* When the CONTEXT is a dependent type, NAME could refer to a
2820 dependent base class of CONTEXT. So we cannot peek inside it,
2821 even if CONTEXT is a currently open scope. */
2822 if (dependent_type_p (context))
2823 return build_typename_type (context, name, fullname, tag_type);
2825 if (!IS_AGGR_TYPE (context))
2827 if (complain & tf_error)
2828 error ("%q#T is not a class", context);
2829 return error_mark_node;
2832 want_template = TREE_CODE (fullname) == TEMPLATE_ID_EXPR;
2834 /* We should only set WANT_TYPE when we're a nested typename type.
2835 Then we can give better diagnostics if we find a non-type. */
2836 t = lookup_field (context, name, 0, /*want_type=*/true);
2839 if (complain & tf_error)
2840 error (want_template ? "no class template named %q#T in %q#T"
2841 : "no type named %q#T in %q#T", name, context);
2842 return error_mark_node;
2845 if (want_template && !DECL_CLASS_TEMPLATE_P (t))
2847 if (complain & tf_error)
2848 error ("%<typename %T::%D%> names %q#T, which is not a class template",
2850 return error_mark_node;
2852 if (!want_template && TREE_CODE (t) != TYPE_DECL)
2854 if (complain & tf_error)
2855 error ("%<typename %T::%D%> names %q#T, which is not a type",
2857 return error_mark_node;
2860 if (complain & tf_error)
2861 perform_or_defer_access_check (TYPE_BINFO (context), t);
2864 return lookup_template_class (t, TREE_OPERAND (fullname, 1),
2866 /*entering_scope=*/0,
2867 tf_warning_or_error | tf_user);
2869 if (DECL_ARTIFICIAL (t) || !(complain & tf_keep_type_decl))
2875 /* Resolve `CONTEXT::template NAME'. Returns a TEMPLATE_DECL if the name
2876 can be resolved or an UNBOUND_CLASS_TEMPLATE, unless an error occurs,
2877 in which case error_mark_node is returned.
2879 If PARM_LIST is non-NULL, also make sure that the template parameter
2880 list of TEMPLATE_DECL matches.
2882 If COMPLAIN zero, don't complain about any errors that occur. */
2885 make_unbound_class_template (tree context, tree name, tree parm_list,
2886 tsubst_flags_t complain)
2892 name = TYPE_IDENTIFIER (name);
2893 else if (DECL_P (name))
2894 name = DECL_NAME (name);
2895 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
2897 if (!dependent_type_p (context)
2898 || currently_open_class (context))
2900 tree tmpl = NULL_TREE;
2902 if (IS_AGGR_TYPE (context))
2903 tmpl = lookup_field (context, name, 0, false);
2905 if (!tmpl || !DECL_CLASS_TEMPLATE_P (tmpl))
2907 if (complain & tf_error)
2908 error ("no class template named %q#T in %q#T", name, context);
2909 return error_mark_node;
2913 && !comp_template_parms (DECL_TEMPLATE_PARMS (tmpl), parm_list))
2915 if (complain & tf_error)
2917 error ("template parameters do not match template");
2918 error ("%q+D declared here", tmpl);
2920 return error_mark_node;
2923 if (complain & tf_error)
2924 perform_or_defer_access_check (TYPE_BINFO (context), tmpl);
2929 /* Build the UNBOUND_CLASS_TEMPLATE. */
2930 t = make_aggr_type (UNBOUND_CLASS_TEMPLATE);
2931 TYPE_CONTEXT (t) = FROB_CONTEXT (context);
2932 TREE_TYPE (t) = NULL_TREE;
2934 /* Build the corresponding TEMPLATE_DECL. */
2935 d = build_decl (TEMPLATE_DECL, name, t);
2936 TYPE_NAME (TREE_TYPE (d)) = d;
2937 TYPE_STUB_DECL (TREE_TYPE (d)) = d;
2938 DECL_CONTEXT (d) = FROB_CONTEXT (context);
2939 DECL_ARTIFICIAL (d) = 1;
2940 DECL_TEMPLATE_PARMS (d) = parm_list;
2947 /* Push the declarations of builtin types into the namespace.
2948 RID_INDEX is the index of the builtin type in the array
2949 RID_POINTERS. NAME is the name used when looking up the builtin
2950 type. TYPE is the _TYPE node for the builtin type. */
2953 record_builtin_type (enum rid rid_index,
2957 tree rname = NULL_TREE, tname = NULL_TREE;
2958 tree tdecl = NULL_TREE;
2960 if ((int) rid_index < (int) RID_MAX)
2961 rname = ridpointers[(int) rid_index];
2963 tname = get_identifier (name);
2965 /* The calls to SET_IDENTIFIER_GLOBAL_VALUE below should be
2966 eliminated. Built-in types should not be looked up name; their
2967 names are keywords that the parser can recognize. However, there
2968 is code in c-common.c that uses identifier_global_value to look
2969 up built-in types by name. */
2972 tdecl = build_decl (TYPE_DECL, tname, type);
2973 DECL_ARTIFICIAL (tdecl) = 1;
2974 SET_IDENTIFIER_GLOBAL_VALUE (tname, tdecl);
2980 tdecl = build_decl (TYPE_DECL, rname, type);
2981 DECL_ARTIFICIAL (tdecl) = 1;
2983 SET_IDENTIFIER_GLOBAL_VALUE (rname, tdecl);
2986 if (!TYPE_NAME (type))
2987 TYPE_NAME (type) = tdecl;
2990 debug_hooks->type_decl (tdecl, 0);
2993 /* Record one of the standard Java types.
2994 * Declare it as having the given NAME.
2995 * If SIZE > 0, it is the size of one of the integral types;
2996 * otherwise it is the negative of the size of one of the other types. */
2999 record_builtin_java_type (const char* name, int size)
3003 type = make_signed_type (size);
3004 else if (size > -32)
3005 { /* "__java_char" or ""__java_boolean". */
3006 type = make_unsigned_type (-size);
3007 /*if (size == -1) TREE_SET_CODE (type, BOOLEAN_TYPE);*/
3010 { /* "__java_float" or ""__java_double". */
3011 type = make_node (REAL_TYPE);
3012 TYPE_PRECISION (type) = - size;
3015 record_builtin_type (RID_MAX, name, type);
3016 decl = TYPE_NAME (type);
3018 /* Suppress generate debug symbol entries for these types,
3019 since for normal C++ they are just clutter.
3020 However, push_lang_context undoes this if extern "Java" is seen. */
3021 DECL_IGNORED_P (decl) = 1;
3023 TYPE_FOR_JAVA (type) = 1;
3027 /* Push a type into the namespace so that the back-ends ignore it. */
3030 record_unknown_type (tree type, const char* name)
3032 tree decl = pushdecl (build_decl (TYPE_DECL, get_identifier (name), type));
3033 /* Make sure the "unknown type" typedecl gets ignored for debug info. */
3034 DECL_IGNORED_P (decl) = 1;
3035 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
3036 TYPE_SIZE (type) = TYPE_SIZE (void_type_node);
3037 TYPE_ALIGN (type) = 1;
3038 TYPE_USER_ALIGN (type) = 0;
3039 TYPE_MODE (type) = TYPE_MODE (void_type_node);
3042 /* A string for which we should create an IDENTIFIER_NODE at
3045 typedef struct predefined_identifier
3047 /* The name of the identifier. */
3048 const char *const name;
3049 /* The place where the IDENTIFIER_NODE should be stored. */
3051 /* Nonzero if this is the name of a constructor or destructor. */
3052 const int ctor_or_dtor_p;
3053 } predefined_identifier;
3055 /* Create all the predefined identifiers. */
3058 initialize_predefined_identifiers (void)
3060 const predefined_identifier *pid;
3062 /* A table of identifiers to create at startup. */
3063 static const predefined_identifier predefined_identifiers[] = {
3064 { "C++", &lang_name_cplusplus, 0 },
3065 { "C", &lang_name_c, 0 },
3066 { "Java", &lang_name_java, 0 },
3067 /* Some of these names have a trailing space so that it is
3068 impossible for them to conflict with names written by users. */
3069 { "__ct ", &ctor_identifier, 1 },
3070 { "__base_ctor ", &base_ctor_identifier, 1 },
3071 { "__comp_ctor ", &complete_ctor_identifier, 1 },
3072 { "__dt ", &dtor_identifier, 1 },
3073 { "__comp_dtor ", &complete_dtor_identifier, 1 },
3074 { "__base_dtor ", &base_dtor_identifier, 1 },
3075 { "__deleting_dtor ", &deleting_dtor_identifier, 1 },
3076 { IN_CHARGE_NAME, &in_charge_identifier, 0 },
3077 { "nelts", &nelts_identifier, 0 },
3078 { THIS_NAME, &this_identifier, 0 },
3079 { VTABLE_DELTA_NAME, &delta_identifier, 0 },
3080 { VTABLE_PFN_NAME, &pfn_identifier, 0 },
3081 { "_vptr", &vptr_identifier, 0 },
3082 { "__vtt_parm", &vtt_parm_identifier, 0 },
3083 { "::", &global_scope_name, 0 },
3084 { "std", &std_identifier, 0 },
3088 for (pid = predefined_identifiers; pid->name; ++pid)
3090 *pid->node = get_identifier (pid->name);
3091 if (pid->ctor_or_dtor_p)
3092 IDENTIFIER_CTOR_OR_DTOR_P (*pid->node) = 1;
3096 /* Create the predefined scalar types of C,
3097 and some nodes representing standard constants (0, 1, (void *)0).
3098 Initialize the global binding level.
3099 Make definitions for built-in primitive functions. */
3102 cxx_init_decl_processing (void)
3105 tree void_ftype_ptr;
3107 build_common_tree_nodes (flag_signed_char, false);
3109 /* Create all the identifiers we need. */
3110 initialize_predefined_identifiers ();
3112 /* Create the global variables. */
3113 push_to_top_level ();
3115 current_function_decl = NULL_TREE;
3116 current_binding_level = NULL;
3117 /* Enter the global namespace. */
3118 gcc_assert (global_namespace == NULL_TREE);
3119 global_namespace = build_lang_decl (NAMESPACE_DECL, global_scope_name,
3121 TREE_PUBLIC (global_namespace) = 1;
3122 begin_scope (sk_namespace, global_namespace);
3124 current_lang_name = NULL_TREE;
3126 /* Adjust various flags based on command-line settings. */
3127 if (!flag_permissive)
3128 flag_pedantic_errors = 1;
3129 if (!flag_no_inline)
3131 flag_inline_trees = 1;
3134 if (flag_inline_functions)
3135 flag_inline_trees = 2;
3137 /* Force minimum function alignment if using the least significant
3138 bit of function pointers to store the virtual bit. */
3139 if (TARGET_PTRMEMFUNC_VBIT_LOCATION == ptrmemfunc_vbit_in_pfn
3140 && force_align_functions_log < 1)
3141 force_align_functions_log = 1;
3144 current_lang_name = lang_name_c;
3146 /* Create the `std' namespace. */
3147 push_namespace (std_identifier);
3148 std_node = current_namespace;
3151 c_common_nodes_and_builtins ();
3153 java_byte_type_node = record_builtin_java_type ("__java_byte", 8);
3154 java_short_type_node = record_builtin_java_type ("__java_short", 16);
3155 java_int_type_node = record_builtin_java_type ("__java_int", 32);
3156 java_long_type_node = record_builtin_java_type ("__java_long", 64);
3157 java_float_type_node = record_builtin_java_type ("__java_float", -32);
3158 java_double_type_node = record_builtin_java_type ("__java_double", -64);
3159 java_char_type_node = record_builtin_java_type ("__java_char", -16);
3160 java_boolean_type_node = record_builtin_java_type ("__java_boolean", -1);
3162 integer_two_node = build_int_cst (NULL_TREE, 2);
3163 integer_three_node = build_int_cst (NULL_TREE, 3);
3165 record_builtin_type (RID_BOOL, "bool", boolean_type_node);
3166 truthvalue_type_node = boolean_type_node;
3167 truthvalue_false_node = boolean_false_node;
3168 truthvalue_true_node = boolean_true_node;
3170 empty_except_spec = build_tree_list (NULL_TREE, NULL_TREE);
3173 record_builtin_type (RID_MAX, NULL, string_type_node);
3176 delta_type_node = ptrdiff_type_node;
3177 vtable_index_type = ptrdiff_type_node;
3179 vtt_parm_type = build_pointer_type (const_ptr_type_node);
3180 void_ftype = build_function_type (void_type_node, void_list_node);
3181 void_ftype_ptr = build_function_type (void_type_node,
3182 tree_cons (NULL_TREE,
3186 = build_exception_variant (void_ftype_ptr, empty_except_spec);
3188 /* C++ extensions */
3190 unknown_type_node = make_node (UNKNOWN_TYPE);
3191 record_unknown_type (unknown_type_node, "unknown type");
3193 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
3194 TREE_TYPE (unknown_type_node) = unknown_type_node;
3196 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
3198 TYPE_POINTER_TO (unknown_type_node) = unknown_type_node;
3199 TYPE_REFERENCE_TO (unknown_type_node) = unknown_type_node;
3202 /* Make sure we get a unique function type, so we can give
3203 its pointer type a name. (This wins for gdb.) */
3204 tree vfunc_type = make_node (FUNCTION_TYPE);
3205 TREE_TYPE (vfunc_type) = integer_type_node;
3206 TYPE_ARG_TYPES (vfunc_type) = NULL_TREE;
3207 layout_type (vfunc_type);
3209 vtable_entry_type = build_pointer_type (vfunc_type);
3211 record_builtin_type (RID_MAX, VTBL_PTR_TYPE, vtable_entry_type);
3214 = build_cplus_array_type (vtable_entry_type, NULL_TREE);
3215 layout_type (vtbl_type_node);
3216 vtbl_type_node = build_qualified_type (vtbl_type_node, TYPE_QUAL_CONST);
3217 record_builtin_type (RID_MAX, NULL, vtbl_type_node);
3218 vtbl_ptr_type_node = build_pointer_type (vtable_entry_type);
3219 layout_type (vtbl_ptr_type_node);
3220 record_builtin_type (RID_MAX, NULL, vtbl_ptr_type_node);
3222 push_namespace (get_identifier ("__cxxabiv1"));
3223 abi_node = current_namespace;
3226 global_type_node = make_node (LANG_TYPE);
3227 record_unknown_type (global_type_node, "global type");
3230 current_lang_name = lang_name_cplusplus;
3234 tree bad_alloc_type_node;
3235 tree bad_alloc_decl;
3236 tree newtype, deltype;
3237 tree ptr_ftype_sizetype;
3239 push_namespace (std_identifier);
3240 bad_alloc_id = get_identifier ("bad_alloc");
3241 bad_alloc_type_node = make_aggr_type (RECORD_TYPE);
3242 TYPE_CONTEXT (bad_alloc_type_node) = current_namespace;
3244 = create_implicit_typedef (bad_alloc_id, bad_alloc_type_node);
3245 DECL_CONTEXT (bad_alloc_decl) = current_namespace;
3246 TYPE_STUB_DECL (bad_alloc_type_node) = bad_alloc_decl;
3250 = build_function_type (ptr_type_node,
3251 tree_cons (NULL_TREE,
3254 newtype = build_exception_variant
3255 (ptr_ftype_sizetype, add_exception_specifier
3256 (NULL_TREE, bad_alloc_type_node, -1));
3257 deltype = build_exception_variant (void_ftype_ptr, empty_except_spec);
3258 push_cp_library_fn (NEW_EXPR, newtype);
3259 push_cp_library_fn (VEC_NEW_EXPR, newtype);
3260 global_delete_fndecl = push_cp_library_fn (DELETE_EXPR, deltype);
3261 push_cp_library_fn (VEC_DELETE_EXPR, deltype);
3265 = build_library_fn_ptr ("__cxa_pure_virtual", void_ftype);
3267 /* Perform other language dependent initializations. */
3268 init_class_processing ();
3269 init_rtti_processing ();
3271 if (flag_exceptions)
3272 init_exception_processing ();
3274 if (! supports_one_only ())
3277 make_fname_decl = cp_make_fname_decl;
3278 start_fname_decls ();
3280 /* Show we use EH for cleanups. */
3281 if (flag_exceptions)
3282 using_eh_for_cleanups ();
3285 /* Generate an initializer for a function naming variable from
3286 NAME. NAME may be NULL, to indicate a dependent name. TYPE_P is
3287 filled in with the type of the init. */
3290 cp_fname_init (const char* name, tree *type_p)
3292 tree domain = NULL_TREE;
3294 tree init = NULL_TREE;
3299 length = strlen (name);
3300 domain = build_index_type (size_int (length));
3301 init = build_string (length + 1, name);
3304 type = build_qualified_type (char_type_node, TYPE_QUAL_CONST);
3305 type = build_cplus_array_type (type, domain);
3310 TREE_TYPE (init) = type;
3312 init = error_mark_node;
3317 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give the
3318 decl, NAME is the initialization string and TYPE_DEP indicates whether
3319 NAME depended on the type of the function. We make use of that to detect
3320 __PRETTY_FUNCTION__ inside a template fn. This is being done
3321 lazily at the point of first use, so we mustn't push the decl now. */
3324 cp_make_fname_decl (tree id, int type_dep)
3326 const char *const name = (type_dep && processing_template_decl
3327 ? NULL : fname_as_string (type_dep));
3329 tree init = cp_fname_init (name, &type);
3330 tree decl = build_decl (VAR_DECL, id, type);
3333 free ((char *) name);
3335 /* As we're using pushdecl_with_scope, we must set the context. */
3336 DECL_CONTEXT (decl) = current_function_decl;
3337 DECL_PRETTY_FUNCTION_P (decl) = type_dep;
3339 TREE_STATIC (decl) = 1;
3340 TREE_READONLY (decl) = 1;
3341 DECL_ARTIFICIAL (decl) = 1;
3343 TREE_USED (decl) = 1;
3345 if (current_function_decl)
3347 struct cp_binding_level *b = current_binding_level;
3348 while (b->level_chain->kind != sk_function_parms)
3350 pushdecl_with_scope (decl, b, /*is_friend=*/false);
3351 cp_finish_decl (decl, init, /*init_const_expr_p=*/false, NULL_TREE,
3352 LOOKUP_ONLYCONVERTING);
3355 pushdecl_top_level_and_finish (decl, init);
3361 builtin_function_1 (tree decl, tree context)
3363 tree id = DECL_NAME (decl);
3364 const char *name = IDENTIFIER_POINTER (id);
3366 retrofit_lang_decl (decl);
3368 /* All nesting of C++ functions is lexical; there is never a "static
3369 chain" in the sense of GNU C nested functions. */
3370 DECL_NO_STATIC_CHAIN (decl) = 1;
3372 DECL_ARTIFICIAL (decl) = 1;
3373 SET_OVERLOADED_OPERATOR_CODE (decl, ERROR_MARK);
3374 SET_DECL_LANGUAGE (decl, lang_c);
3375 /* Runtime library routines are, by definition, available in an
3376 external shared object. */
3377 DECL_VISIBILITY (decl) = VISIBILITY_DEFAULT;
3378 DECL_VISIBILITY_SPECIFIED (decl) = 1;
3380 DECL_CONTEXT (decl) = context;
3384 /* A function in the user's namespace should have an explicit
3385 declaration before it is used. Mark the built-in function as
3386 anticipated but not actually declared. */
3387 if (name[0] != '_' || name[1] != '_')
3388 DECL_ANTICIPATED (decl) = 1;
3394 cxx_builtin_function (tree decl)
3396 tree id = DECL_NAME (decl);
3397 const char *name = IDENTIFIER_POINTER (id);
3398 tree decl2 = copy_node(decl);
3399 /* All builtins that don't begin with an '_' should additionally
3400 go in the 'std' namespace. */
3403 push_namespace (std_identifier);
3404 builtin_function_1 (decl, std_node);
3408 return builtin_function_1 (decl2, NULL_TREE);
3411 /* Generate a FUNCTION_DECL with the typical flags for a runtime library
3412 function. Not called directly. */
3415 build_library_fn_1 (tree name, enum tree_code operator_code, tree type)
3417 tree fn = build_lang_decl (FUNCTION_DECL, name, type);
3418 DECL_EXTERNAL (fn) = 1;
3419 TREE_PUBLIC (fn) = 1;
3420 DECL_ARTIFICIAL (fn) = 1;
3421 SET_OVERLOADED_OPERATOR_CODE (fn, operator_code);
3422 SET_DECL_LANGUAGE (fn, lang_c);
3423 /* Runtime library routines are, by definition, available in an
3424 external shared object. */
3425 DECL_VISIBILITY (fn) = VISIBILITY_DEFAULT;
3426 DECL_VISIBILITY_SPECIFIED (fn) = 1;
3430 /* Returns the _DECL for a library function with C linkage.
3431 We assume that such functions never throw; if this is incorrect,
3432 callers should unset TREE_NOTHROW. */
3435 build_library_fn (tree name, tree type)
3437 tree fn = build_library_fn_1 (name, ERROR_MARK, type);
3438 TREE_NOTHROW (fn) = 1;
3442 /* Returns the _DECL for a library function with C++ linkage. */
3445 build_cp_library_fn (tree name, enum tree_code operator_code, tree type)
3447 tree fn = build_library_fn_1 (name, operator_code, type);
3448 TREE_NOTHROW (fn) = TYPE_NOTHROW_P (type);
3449 DECL_CONTEXT (fn) = FROB_CONTEXT (current_namespace);
3450 SET_DECL_LANGUAGE (fn, lang_cplusplus);
3454 /* Like build_library_fn, but takes a C string instead of an
3458 build_library_fn_ptr (const char* name, tree type)
3460 return build_library_fn (get_identifier (name), type);
3463 /* Like build_cp_library_fn, but takes a C string instead of an
3467 build_cp_library_fn_ptr (const char* name, tree type)
3469 return build_cp_library_fn (get_identifier (name), ERROR_MARK, type);
3472 /* Like build_library_fn, but also pushes the function so that we will
3473 be able to find it via IDENTIFIER_GLOBAL_VALUE. */
3476 push_library_fn (tree name, tree type)
3478 tree fn = build_library_fn (name, type);
3479 pushdecl_top_level (fn);
3483 /* Like build_cp_library_fn, but also pushes the function so that it
3484 will be found by normal lookup. */
3487 push_cp_library_fn (enum tree_code operator_code, tree type)
3489 tree fn = build_cp_library_fn (ansi_opname (operator_code),
3496 /* Like push_library_fn, but takes a TREE_LIST of parm types rather than
3500 push_void_library_fn (tree name, tree parmtypes)
3502 tree type = build_function_type (void_type_node, parmtypes);
3503 return push_library_fn (name, type);
3506 /* Like push_library_fn, but also note that this function throws
3507 and does not return. Used for __throw_foo and the like. */
3510 push_throw_library_fn (tree name, tree type)
3512 tree fn = push_library_fn (name, type);
3513 TREE_THIS_VOLATILE (fn) = 1;
3514 TREE_NOTHROW (fn) = 0;
3518 /* When we call finish_struct for an anonymous union, we create
3519 default copy constructors and such. But, an anonymous union
3520 shouldn't have such things; this function undoes the damage to the
3521 anonymous union type T.
3523 (The reason that we create the synthesized methods is that we don't
3524 distinguish `union { int i; }' from `typedef union { int i; } U'.
3525 The first is an anonymous union; the second is just an ordinary
3529 fixup_anonymous_aggr (tree t)
3533 /* Wipe out memory of synthesized methods. */
3534 TYPE_HAS_CONSTRUCTOR (t) = 0;
3535 TYPE_HAS_DEFAULT_CONSTRUCTOR (t) = 0;
3536 TYPE_HAS_INIT_REF (t) = 0;
3537 TYPE_HAS_CONST_INIT_REF (t) = 0;
3538 TYPE_HAS_ASSIGN_REF (t) = 0;
3539 TYPE_HAS_CONST_ASSIGN_REF (t) = 0;
3541 /* Splice the implicitly generated functions out of the TYPE_METHODS
3543 q = &TYPE_METHODS (t);
3546 if (DECL_ARTIFICIAL (*q))
3547 *q = TREE_CHAIN (*q);
3549 q = &TREE_CHAIN (*q);
3552 /* ISO C++ 9.5.3. Anonymous unions may not have function members. */
3553 if (TYPE_METHODS (t))
3554 error ("%Jan anonymous union cannot have function members",
3555 TYPE_MAIN_DECL (t));
3557 /* Anonymous aggregates cannot have fields with ctors, dtors or complex
3558 assignment operators (because they cannot have these methods themselves).
3559 For anonymous unions this is already checked because they are not allowed
3560 in any union, otherwise we have to check it. */
3561 if (TREE_CODE (t) != UNION_TYPE)
3565 for (field = TYPE_FIELDS (t); field; field = TREE_CHAIN (field))
3566 if (TREE_CODE (field) == FIELD_DECL)
3568 type = TREE_TYPE (field);
3569 if (CLASS_TYPE_P (type))
3571 if (TYPE_NEEDS_CONSTRUCTING (type))
3572 error ("member %q+#D with constructor not allowed "
3573 "in anonymous aggregate", field);
3574 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
3575 error ("member %q+#D with destructor not allowed "
3576 "in anonymous aggregate", field);
3577 if (TYPE_HAS_COMPLEX_ASSIGN_REF (type))
3578 error ("member %q+#D with copy assignment operator "
3579 "not allowed in anonymous aggregate", field);
3585 /* Make sure that a declaration with no declarator is well-formed, i.e.
3586 just declares a tagged type or anonymous union.
3588 Returns the type declared; or NULL_TREE if none. */
3591 check_tag_decl (cp_decl_specifier_seq *declspecs)
3593 int saw_friend = declspecs->specs[(int)ds_friend] != 0;
3594 int saw_typedef = declspecs->specs[(int)ds_typedef] != 0;
3595 /* If a class, struct, or enum type is declared by the DECLSPECS
3596 (i.e, if a class-specifier, enum-specifier, or non-typename
3597 elaborated-type-specifier appears in the DECLSPECS),
3598 DECLARED_TYPE is set to the corresponding type. */
3599 tree declared_type = NULL_TREE;
3600 bool error_p = false;
3602 if (declspecs->multiple_types_p)
3603 error ("multiple types in one declaration");
3604 else if (declspecs->redefined_builtin_type)
3606 if (!in_system_header)
3607 pedwarn ("redeclaration of C++ built-in type %qT",
3608 declspecs->redefined_builtin_type);
3613 && TYPE_P (declspecs->type)
3614 && ((TREE_CODE (declspecs->type) != TYPENAME_TYPE
3615 && IS_AGGR_TYPE (declspecs->type))
3616 || TREE_CODE (declspecs->type) == ENUMERAL_TYPE))
3617 declared_type = declspecs->type;
3618 else if (declspecs->type == error_mark_node)
3620 if (declared_type == NULL_TREE && ! saw_friend && !error_p)
3621 pedwarn ("declaration does not declare anything");
3622 /* Check for an anonymous union. */
3623 else if (declared_type && IS_AGGR_TYPE_CODE (TREE_CODE (declared_type))
3624 && TYPE_ANONYMOUS_P (declared_type))
3626 /* 7/3 In a simple-declaration, the optional init-declarator-list
3627 can be omitted only when declaring a class (clause 9) or
3628 enumeration (7.2), that is, when the decl-specifier-seq contains
3629 either a class-specifier, an elaborated-type-specifier with
3630 a class-key (9.1), or an enum-specifier. In these cases and
3631 whenever a class-specifier or enum-specifier is present in the
3632 decl-specifier-seq, the identifiers in these specifiers are among
3633 the names being declared by the declaration (as class-name,
3634 enum-names, or enumerators, depending on the syntax). In such
3635 cases, and except for the declaration of an unnamed bit-field (9.6),
3636 the decl-specifier-seq shall introduce one or more names into the
3637 program, or shall redeclare a name introduced by a previous
3638 declaration. [Example:
3639 enum { }; // ill-formed
3640 typedef class { }; // ill-formed
3644 error ("missing type-name in typedef-declaration");
3647 /* Anonymous unions are objects, so they can have specifiers. */;
3648 SET_ANON_AGGR_TYPE_P (declared_type);
3650 if (TREE_CODE (declared_type) != UNION_TYPE && pedantic
3651 && !in_system_header)
3652 pedwarn ("ISO C++ prohibits anonymous structs");
3657 if (declspecs->specs[(int)ds_inline]
3658 || declspecs->specs[(int)ds_virtual])
3659 error ("%qs can only be specified for functions",
3660 declspecs->specs[(int)ds_inline]
3661 ? "inline" : "virtual");
3663 && (!current_class_type
3664 || current_scope () != current_class_type))
3665 error ("%<friend%> can only be specified inside a class");
3666 else if (declspecs->specs[(int)ds_explicit])
3667 error ("%<explicit%> can only be specified for constructors");
3668 else if (declspecs->storage_class)
3669 error ("a storage class can only be specified for objects "
3671 else if (declspecs->specs[(int)ds_const]
3672 || declspecs->specs[(int)ds_volatile]
3673 || declspecs->specs[(int)ds_restrict]
3674 || declspecs->specs[(int)ds_thread])
3675 error ("qualifiers can only be specified for objects "
3679 return declared_type;
3682 /* Called when a declaration is seen that contains no names to declare.
3683 If its type is a reference to a structure, union or enum inherited
3684 from a containing scope, shadow that tag name for the current scope
3685 with a forward reference.
3686 If its type defines a new named structure or union
3687 or defines an enum, it is valid but we need not do anything here.
3688 Otherwise, it is an error.
3690 C++: may have to grok the declspecs to learn about static,
3691 complain for anonymous unions.
3693 Returns the TYPE declared -- or NULL_TREE if none. */
3696 shadow_tag (cp_decl_specifier_seq *declspecs)
3698 tree t = check_tag_decl (declspecs);
3703 if (declspecs->attributes)
3705 warning (0, "attribute ignored in declaration of %q+#T", t);
3706 warning (0, "attribute for %q+#T must follow the %qs keyword",
3707 t, class_key_or_enum_as_string (t));
3711 if (maybe_process_partial_specialization (t) == error_mark_node)
3714 /* This is where the variables in an anonymous union are
3715 declared. An anonymous union declaration looks like:
3717 because there is no declarator after the union, the parser
3718 sends that declaration here. */
3719 if (ANON_AGGR_TYPE_P (t))
3721 fixup_anonymous_aggr (t);
3723 if (TYPE_FIELDS (t))
3725 tree decl = grokdeclarator (/*declarator=*/NULL,
3726 declspecs, NORMAL, 0, NULL);
3727 finish_anon_union (decl);
3734 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
3737 groktypename (cp_decl_specifier_seq *type_specifiers,
3738 const cp_declarator *declarator)
3742 attrs = type_specifiers->attributes;
3743 type_specifiers->attributes = NULL_TREE;
3744 type = grokdeclarator (declarator, type_specifiers, TYPENAME, 0, &attrs);
3746 cplus_decl_attributes (&type, attrs, 0);
3750 /* Decode a declarator in an ordinary declaration or data definition.
3751 This is called as soon as the type information and variable name
3752 have been parsed, before parsing the initializer if any.
3753 Here we create the ..._DECL node, fill in its type,
3754 and put it on the list of decls for the current context.
3755 The ..._DECL node is returned as the value.
3757 Exception: for arrays where the length is not specified,
3758 the type is left null, to be filled in by `cp_finish_decl'.
3760 Function definitions do not come here; they go to start_function
3761 instead. However, external and forward declarations of functions
3762 do go through here. Structure field declarations are done by
3763 grokfield and not through here. */
3766 start_decl (const cp_declarator *declarator,
3767 cp_decl_specifier_seq *declspecs,
3770 tree prefix_attributes,
3771 tree *pushed_scope_p)
3777 *pushed_scope_p = NULL_TREE;
3779 /* An object declared as __attribute__((deprecated)) suppresses
3780 warnings of uses of other deprecated items. */
3781 if (lookup_attribute ("deprecated", attributes))
3782 deprecated_state = DEPRECATED_SUPPRESS;
3784 attributes = chainon (attributes, prefix_attributes);
3786 decl = grokdeclarator (declarator, declspecs, NORMAL, initialized,
3789 deprecated_state = DEPRECATED_NORMAL;
3791 if (decl == NULL_TREE || TREE_CODE (decl) == VOID_TYPE
3792 || decl == error_mark_node)
3793 return error_mark_node;
3795 type = TREE_TYPE (decl);
3797 context = DECL_CONTEXT (decl);
3801 *pushed_scope_p = push_scope (context);
3803 /* We are only interested in class contexts, later. */
3804 if (TREE_CODE (context) == NAMESPACE_DECL)
3805 context = NULL_TREE;
3809 /* Is it valid for this decl to have an initializer at all?
3810 If not, set INITIALIZED to zero, which will indirectly
3811 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
3812 switch (TREE_CODE (decl))
3815 error ("typedef %qD is initialized (use __typeof__ instead)", decl);
3816 return error_mark_node;
3819 error ("function %q#D is initialized like a variable", decl);
3820 return error_mark_node;
3828 if (! toplevel_bindings_p ()
3829 && DECL_EXTERNAL (decl))
3830 warning (0, "declaration of %q#D has %<extern%> and is initialized",
3832 DECL_EXTERNAL (decl) = 0;
3833 if (toplevel_bindings_p ())
3834 TREE_STATIC (decl) = 1;
3837 /* Set attributes here so if duplicate decl, will have proper attributes. */
3838 cplus_decl_attributes (&decl, attributes, 0);
3840 /* Dllimported symbols cannot be defined. Static data members (which
3841 can be initialized in-class and dllimported) go through grokfield,
3842 not here, so we don't need to exclude those decls when checking for
3844 if (initialized && DECL_DLLIMPORT_P (decl))
3846 error ("definition of %q#D is marked %<dllimport%>", decl);
3847 DECL_DLLIMPORT_P (decl) = 0;
3850 /* If #pragma weak was used, mark the decl weak now. */
3851 maybe_apply_pragma_weak (decl);
3853 if (TREE_CODE (decl) == FUNCTION_DECL
3854 && DECL_DECLARED_INLINE_P (decl)
3855 && DECL_UNINLINABLE (decl)
3856 && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl)))
3857 warning (0, "inline function %q+D given attribute noinline", decl);
3859 if (context && COMPLETE_TYPE_P (complete_type (context)))
3861 if (TREE_CODE (decl) == VAR_DECL)
3863 tree field = lookup_field (context, DECL_NAME (decl), 0, false);
3864 if (field == NULL_TREE || TREE_CODE (field) != VAR_DECL)
3865 error ("%q#D is not a static member of %q#T", decl, context);
3868 if (DECL_CONTEXT (field) != context)
3870 if (!same_type_p (DECL_CONTEXT (field), context))
3871 pedwarn ("ISO C++ does not permit %<%T::%D%> "
3872 "to be defined as %<%T::%D%>",
3873 DECL_CONTEXT (field), DECL_NAME (decl),
3874 context, DECL_NAME (decl));
3875 DECL_CONTEXT (decl) = DECL_CONTEXT (field);
3877 if (processing_specialization
3878 && template_class_depth (context) == 0
3879 && CLASSTYPE_TEMPLATE_SPECIALIZATION (context))
3880 error ("template header not allowed in member definition "
3881 "of explicitly specialized class");
3882 /* Static data member are tricky; an in-class initialization
3883 still doesn't provide a definition, so the in-class
3884 declaration will have DECL_EXTERNAL set, but will have an
3885 initialization. Thus, duplicate_decls won't warn
3886 about this situation, and so we check here. */
3887 if (initialized && DECL_INITIALIZED_IN_CLASS_P (field))
3888 error ("duplicate initialization of %qD", decl);
3889 if (duplicate_decls (decl, field, /*newdecl_is_friend=*/false))
3895 tree field = check_classfn (context, decl,
3896 (processing_template_decl
3897 > template_class_depth (context))
3898 ? current_template_parms
3900 if (field && duplicate_decls (decl, field,
3901 /*newdecl_is_friend=*/false))
3905 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
3906 DECL_IN_AGGR_P (decl) = 0;
3907 /* Do not mark DECL as an explicit specialization if it was not
3908 already marked as an instantiation; a declaration should
3909 never be marked as a specialization unless we know what
3910 template is being specialized. */
3911 if (DECL_LANG_SPECIFIC (decl) && DECL_USE_TEMPLATE (decl))
3913 SET_DECL_TEMPLATE_SPECIALIZATION (decl);
3915 /* [temp.expl.spec] An explicit specialization of a static data
3916 member of a template is a definition if the declaration
3917 includes an initializer; otherwise, it is a declaration.
3919 We check for processing_specialization so this only applies
3920 to the new specialization syntax. */
3921 if (!initialized && processing_specialization)
3922 DECL_EXTERNAL (decl) = 1;
3925 if (DECL_EXTERNAL (decl) && ! DECL_TEMPLATE_SPECIALIZATION (decl))
3926 pedwarn ("declaration of %q#D outside of class is not definition",
3930 /* Enter this declaration into the symbol table. */
3931 tem = maybe_push_decl (decl);
3933 if (processing_template_decl)
3934 tem = push_template_decl (tem);
3935 if (tem == error_mark_node)
3936 return error_mark_node;
3938 /* Tell the back-end to use or not use .common as appropriate. If we say
3939 -fconserve-space, we want this to save .data space, at the expense of
3940 wrong semantics. If we say -fno-conserve-space, we want this to
3941 produce errors about redefs; to do this we force variables into the
3943 if (flag_conserve_space
3944 && TREE_CODE (tem) == VAR_DECL
3945 && TREE_PUBLIC (tem)
3946 && !DECL_THREAD_LOCAL_P (tem)
3947 && !have_global_bss_p ())
3948 DECL_COMMON (tem) = 1;
3950 if (!processing_template_decl && TREE_CODE (tem) == VAR_DECL)
3951 start_decl_1 (tem, initialized);
3957 start_decl_1 (tree decl, bool initialized)
3961 gcc_assert (!processing_template_decl);
3963 if (error_operand_p (decl))
3966 gcc_assert (TREE_CODE (decl) == VAR_DECL);
3967 type = TREE_TYPE (decl);
3970 /* Is it valid for this decl to have an initializer at all?
3971 If not, set INITIALIZED to zero, which will indirectly
3972 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
3974 /* Don't allow initializations for incomplete types except for
3975 arrays which might be completed by the initialization. */
3976 if (COMPLETE_TYPE_P (complete_type (type)))
3977 ; /* A complete type is ok. */
3978 else if (TREE_CODE (type) != ARRAY_TYPE)
3980 error ("variable %q#D has initializer but incomplete type", decl);
3982 type = TREE_TYPE (decl) = error_mark_node;
3984 else if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (type))))
3986 if (DECL_LANG_SPECIFIC (decl) && DECL_TEMPLATE_INFO (decl))
3987 error ("elements of array %q#D have incomplete type", decl);
3988 /* else we already gave an error in start_decl. */
3992 else if (IS_AGGR_TYPE (type)
3993 && ! DECL_EXTERNAL (decl))
3995 if (!COMPLETE_TYPE_P (complete_type (type)))
3997 error ("aggregate %q#D has incomplete type and cannot be defined",
3999 /* Change the type so that assemble_variable will give
4000 DECL an rtl we can live with: (mem (const_int 0)). */
4001 type = TREE_TYPE (decl) = error_mark_node;
4005 /* If any base type in the hierarchy of TYPE needs a constructor,
4006 then we set initialized to 1. This way any nodes which are
4007 created for the purposes of initializing this aggregate
4008 will live as long as it does. This is necessary for global
4009 aggregates which do not have their initializers processed until
4010 the end of the file. */
4011 initialized = TYPE_NEEDS_CONSTRUCTING (type);
4015 /* Create a new scope to hold this declaration if necessary.
4016 Whether or not a new scope is necessary cannot be determined
4017 until after the type has been completed; if the type is a
4018 specialization of a class template it is not until after
4019 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
4020 will be set correctly. */
4021 maybe_push_cleanup_level (type);
4024 /* Handle initialization of references. DECL, TYPE, and INIT have the
4025 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
4026 but will be set to a new CLEANUP_STMT if a temporary is created
4027 that must be destroyed subsequently.
4029 Returns an initializer expression to use to initialize DECL, or
4030 NULL if the initialization can be performed statically.
4032 Quotes on semantics can be found in ARM 8.4.3. */
4035 grok_reference_init (tree decl, tree type, tree init, tree *cleanup)
4039 if (init == NULL_TREE)
4041 if ((DECL_LANG_SPECIFIC (decl) == 0
4042 || DECL_IN_AGGR_P (decl) == 0)
4043 && ! DECL_THIS_EXTERN (decl))
4044 error ("%qD declared as reference but not initialized", decl);
4048 if (TREE_CODE (init) == CONSTRUCTOR)
4050 error ("ISO C++ forbids use of initializer list to "
4051 "initialize reference %qD", decl);
4055 if (TREE_CODE (init) == TREE_LIST)
4056 init = build_x_compound_expr_from_list (init, "initializer");
4058 if (TREE_CODE (TREE_TYPE (type)) != ARRAY_TYPE
4059 && TREE_CODE (TREE_TYPE (init)) == ARRAY_TYPE)
4060 /* Note: default conversion is only called in very special cases. */
4061 init = decay_conversion (init);
4063 /* Convert INIT to the reference type TYPE. This may involve the
4064 creation of a temporary, whose lifetime must be the same as that
4065 of the reference. If so, a DECL_EXPR for the temporary will be
4066 added just after the DECL_EXPR for DECL. That's why we don't set
4067 DECL_INITIAL for local references (instead assigning to them
4068 explicitly); we need to allow the temporary to be initialized
4070 tmp = initialize_reference (type, init, decl, cleanup);
4072 if (tmp == error_mark_node)
4074 else if (tmp == NULL_TREE)
4076 error ("cannot initialize %qT from %qT", type, TREE_TYPE (init));
4080 if (TREE_STATIC (decl) && !TREE_CONSTANT (tmp))
4083 DECL_INITIAL (decl) = tmp;
4088 /* When parsing `int a[] = {1, 2};' we don't know the size of the
4089 array until we finish parsing the initializer. If that's the
4090 situation we're in, update DECL accordingly. */
4093 maybe_deduce_size_from_array_init (tree decl, tree init)
4095 tree type = TREE_TYPE (decl);
4097 if (TREE_CODE (type) == ARRAY_TYPE
4098 && TYPE_DOMAIN (type) == NULL_TREE
4099 && TREE_CODE (decl) != TYPE_DECL)
4101 /* do_default is really a C-ism to deal with tentative definitions.
4102 But let's leave it here to ease the eventual merge. */
4103 int do_default = !DECL_EXTERNAL (decl);
4104 tree initializer = init ? init : DECL_INITIAL (decl);
4105 int failure = cp_complete_array_type (&TREE_TYPE (decl), initializer,
4110 error ("initializer fails to determine size of %qD", decl);
4111 TREE_TYPE (decl) = error_mark_node;
4113 else if (failure == 2)
4117 error ("array size missing in %qD", decl);
4118 TREE_TYPE (decl) = error_mark_node;
4120 /* If a `static' var's size isn't known, make it extern as
4121 well as static, so it does not get allocated. If it's not
4122 `static', then don't mark it extern; finish_incomplete_decl
4123 will give it a default size and it will get allocated. */
4124 else if (!pedantic && TREE_STATIC (decl) && !TREE_PUBLIC (decl))
4125 DECL_EXTERNAL (decl) = 1;
4127 else if (failure == 3)
4129 error ("zero-size array %qD", decl);
4130 TREE_TYPE (decl) = error_mark_node;
4133 cp_apply_type_quals_to_decl (cp_type_quals (TREE_TYPE (decl)), decl);
4135 layout_decl (decl, 0);
4139 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
4140 any appropriate error messages regarding the layout. */
4143 layout_var_decl (tree decl)
4147 type = TREE_TYPE (decl);
4148 if (type == error_mark_node)
4151 /* If we haven't already layed out this declaration, do so now.
4152 Note that we must not call complete type for an external object
4153 because it's type might involve templates that we are not
4154 supposed to instantiate yet. (And it's perfectly valid to say
4155 `extern X x' for some incomplete type `X'.) */
4156 if (!DECL_EXTERNAL (decl))
4157 complete_type (type);
4158 if (!DECL_SIZE (decl)
4159 && TREE_TYPE (decl) != error_mark_node
4160 && (COMPLETE_TYPE_P (type)
4161 || (TREE_CODE (type) == ARRAY_TYPE
4162 && !TYPE_DOMAIN (type)
4163 && COMPLETE_TYPE_P (TREE_TYPE (type)))))
4164 layout_decl (decl, 0);
4166 if (!DECL_EXTERNAL (decl) && DECL_SIZE (decl) == NULL_TREE)
4168 /* An automatic variable with an incomplete type: that is an error.
4169 Don't talk about array types here, since we took care of that
4170 message in grokdeclarator. */
4171 error ("storage size of %qD isn't known", decl);
4172 TREE_TYPE (decl) = error_mark_node;
4175 /* Keep this code around in case we later want to control debug info
4176 based on whether a type is "used". (jason 1999-11-11) */
4178 else if (!DECL_EXTERNAL (decl) && IS_AGGR_TYPE (ttype))
4179 /* Let debugger know it should output info for this type. */
4180 note_debug_info_needed (ttype);
4182 if (TREE_STATIC (decl) && DECL_CLASS_SCOPE_P (decl))
4183 note_debug_info_needed (DECL_CONTEXT (decl));
4186 if ((DECL_EXTERNAL (decl) || TREE_STATIC (decl))
4187 && DECL_SIZE (decl) != NULL_TREE
4188 && ! TREE_CONSTANT (DECL_SIZE (decl)))
4190 if (TREE_CODE (DECL_SIZE (decl)) == INTEGER_CST)
4191 constant_expression_warning (DECL_SIZE (decl));
4193 error ("storage size of %qD isn't constant", decl);
4197 /* If a local static variable is declared in an inline function, or if
4198 we have a weak definition, we must endeavor to create only one
4199 instance of the variable at link-time. */
4202 maybe_commonize_var (tree decl)
4204 /* Static data in a function with comdat linkage also has comdat
4206 if (TREE_STATIC (decl)
4207 /* Don't mess with __FUNCTION__. */
4208 && ! DECL_ARTIFICIAL (decl)
4209 && DECL_FUNCTION_SCOPE_P (decl)
4210 /* Unfortunately, import_export_decl has not always been called
4211 before the function is processed, so we cannot simply check
4213 && (DECL_COMDAT (DECL_CONTEXT (decl))
4214 || ((DECL_DECLARED_INLINE_P (DECL_CONTEXT (decl))
4215 || DECL_TEMPLATE_INSTANTIATION (DECL_CONTEXT (decl)))
4216 && TREE_PUBLIC (DECL_CONTEXT (decl)))))
4220 /* With weak symbols, we simply make the variable COMDAT;
4221 that will cause copies in multiple translations units to
4223 comdat_linkage (decl);
4227 if (DECL_INITIAL (decl) == NULL_TREE
4228 || DECL_INITIAL (decl) == error_mark_node)
4230 /* Without weak symbols, we can use COMMON to merge
4231 uninitialized variables. */
4232 TREE_PUBLIC (decl) = 1;
4233 DECL_COMMON (decl) = 1;
4237 /* While for initialized variables, we must use internal
4238 linkage -- which means that multiple copies will not
4240 TREE_PUBLIC (decl) = 0;
4241 DECL_COMMON (decl) = 0;
4242 warning (0, "sorry: semantics of inline function static "
4243 "data %q+#D are wrong (you'll wind up "
4244 "with multiple copies)", decl);
4245 warning (0, "%J you can work around this by removing "
4251 else if (DECL_LANG_SPECIFIC (decl) && DECL_COMDAT (decl))
4252 /* Set it up again; we might have set DECL_INITIAL since the last
4254 comdat_linkage (decl);
4257 /* Issue an error message if DECL is an uninitialized const variable. */
4260 check_for_uninitialized_const_var (tree decl)
4262 tree type = TREE_TYPE (decl);
4264 /* ``Unless explicitly declared extern, a const object does not have
4265 external linkage and must be initialized. ($8.4; $12.1)'' ARM
4267 if (TREE_CODE (decl) == VAR_DECL
4268 && TREE_CODE (type) != REFERENCE_TYPE
4269 && CP_TYPE_CONST_P (type)
4270 && !TYPE_NEEDS_CONSTRUCTING (type)
4271 && !DECL_INITIAL (decl))
4272 error ("uninitialized const %qD", decl);
4276 /* Structure holding the current initializer being processed by reshape_init.
4277 CUR is a pointer to the current element being processed, END is a pointer
4278 after the last element present in the initializer. */
4279 typedef struct reshape_iterator_t
4281 constructor_elt *cur;
4282 constructor_elt *end;
4285 static tree reshape_init_r (tree, reshape_iter *, bool);
4287 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
4288 returned is the next FIELD_DECL (possibly FIELD itself) that can be
4289 initialized. If there are no more such fields, the return value
4293 next_initializable_field (tree field)
4296 && (TREE_CODE (field) != FIELD_DECL
4297 || (DECL_C_BIT_FIELD (field) && !DECL_NAME (field))
4298 || DECL_ARTIFICIAL (field)))
4299 field = TREE_CHAIN (field);
4304 /* Subroutine of reshape_init_array and reshape_init_vector, which does
4305 the actual work. ELT_TYPE is the element type of the array. MAX_INDEX is an
4306 INTEGER_CST representing the size of the array minus one (the maximum index),
4307 or NULL_TREE if the array was declared without specifying the size. D is
4308 the iterator within the constructor. */
4311 reshape_init_array_1 (tree elt_type, tree max_index, reshape_iter *d)
4314 bool sized_array_p = (max_index != NULL_TREE);
4315 unsigned HOST_WIDE_INT max_index_cst = 0;
4316 unsigned HOST_WIDE_INT index;
4318 /* The initializer for an array is always a CONSTRUCTOR. */
4319 new_init = build_constructor (NULL_TREE, NULL);
4323 /* Minus 1 is used for zero sized arrays. */
4324 if (integer_all_onesp (max_index))
4327 if (host_integerp (max_index, 1))
4328 max_index_cst = tree_low_cst (max_index, 1);
4329 /* sizetype is sign extended, not zero extended. */
4331 max_index_cst = tree_low_cst (fold_convert (size_type_node, max_index),
4335 /* Loop until there are no more initializers. */
4337 d->cur != d->end && (!sized_array_p || index <= max_index_cst);
4344 /* Handle array designated initializers (GNU extension). */
4345 if (TREE_CODE (d->cur->index) == IDENTIFIER_NODE)
4347 error ("name %qD used in a GNU-style designated "
4348 "initializer for an array", d->cur->index);
4354 elt_init = reshape_init_r (elt_type, d, /*first_initializer_p=*/false);
4355 if (elt_init == error_mark_node)
4356 return error_mark_node;
4357 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init), NULL_TREE, elt_init);
4363 /* Subroutine of reshape_init_r, processes the initializers for arrays.
4364 Parameters are the same of reshape_init_r. */
4367 reshape_init_array (tree type, reshape_iter *d)
4369 tree max_index = NULL_TREE;
4371 gcc_assert (TREE_CODE (type) == ARRAY_TYPE);
4373 if (TYPE_DOMAIN (type))
4374 max_index = array_type_nelts (type);
4376 return reshape_init_array_1 (TREE_TYPE (type), max_index, d);
4379 /* Subroutine of reshape_init_r, processes the initializers for vectors.
4380 Parameters are the same of reshape_init_r. */
4383 reshape_init_vector (tree type, reshape_iter *d)
4385 tree max_index = NULL_TREE;
4388 gcc_assert (TREE_CODE (type) == VECTOR_TYPE);
4390 if (COMPOUND_LITERAL_P (d->cur->value))
4392 tree value = d->cur->value;
4393 if (!same_type_p (TREE_TYPE (value), type))
4395 error ("invalid type %qT as initializer for a vector of type %qT",
4396 TREE_TYPE (d->cur->value), type);
4397 value = error_mark_node;
4403 /* For a vector, the representation type is a struct
4404 containing a single member which is an array of the
4405 appropriate size. */
4406 rtype = TYPE_DEBUG_REPRESENTATION_TYPE (type);
4407 if (rtype && TYPE_DOMAIN (TREE_TYPE (TYPE_FIELDS (rtype))))
4408 max_index = array_type_nelts (TREE_TYPE (TYPE_FIELDS (rtype)));
4410 return reshape_init_array_1 (TREE_TYPE (type), max_index, d);
4413 /* Subroutine of reshape_init_r, processes the initializers for classes
4414 or union. Parameters are the same of reshape_init_r. */
4417 reshape_init_class (tree type, reshape_iter *d, bool first_initializer_p)
4422 gcc_assert (CLASS_TYPE_P (type));
4424 /* The initializer for a class is always a CONSTRUCTOR. */
4425 new_init = build_constructor (NULL_TREE, NULL);
4426 field = next_initializable_field (TYPE_FIELDS (type));
4432 An initializer for an aggregate member that is an
4433 empty class shall have the form of an empty
4434 initializer-list {}. */
4435 if (!first_initializer_p)
4437 error ("initializer for %qT must be brace-enclosed", type);
4438 return error_mark_node;
4443 /* Loop through the initializable fields, gathering initializers. */
4444 while (d->cur != d->end)
4448 /* Handle designated initializers, as an extension. */
4451 field = lookup_field_1 (type, d->cur->index, /*want_type=*/false);
4453 if (!field || TREE_CODE (field) != FIELD_DECL)
4455 error ("%qT has no non-static data member named %qD", type,
4457 return error_mark_node;
4461 /* If we processed all the member of the class, we are done. */
4465 field_init = reshape_init_r (TREE_TYPE (field), d,
4466 /*first_initializer_p=*/false);
4467 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init), field, field_init);
4471 When a union is initialized with a brace-enclosed
4472 initializer, the braces shall only contain an
4473 initializer for the first member of the union. */
4474 if (TREE_CODE (type) == UNION_TYPE)
4477 field = next_initializable_field (TREE_CHAIN (field));
4483 /* Subroutine of reshape_init, which processes a single initializer (part of
4484 a CONSTRUCTOR). TYPE is the type of the variable being initialized, D is the
4485 iterator within the CONSTRUCTOR which points to the initializer to process.
4486 FIRST_INITIALIZER_P is true if this is the first initializer of the
4487 CONSTRUCTOR node. */
4490 reshape_init_r (tree type, reshape_iter *d, bool first_initializer_p)
4492 tree init = d->cur->value;
4494 /* A non-aggregate type is always initialized with a single
4496 if (!CP_AGGREGATE_TYPE_P (type))
4498 /* It is invalid to initialize a non-aggregate type with a
4499 brace-enclosed initializer.
4500 We need to check for BRACE_ENCLOSED_INITIALIZER_P here because
4501 of g++.old-deja/g++.mike/p7626.C: a pointer-to-member constant is
4502 a CONSTRUCTOR (with a record type). */
4503 if (TREE_CODE (init) == CONSTRUCTOR
4504 && BRACE_ENCLOSED_INITIALIZER_P (init)) /* p7626.C */
4506 error ("braces around scalar initializer for type %qT", type);
4507 init = error_mark_node;
4516 All implicit type conversions (clause _conv_) are considered when
4517 initializing the aggregate member with an initializer from an
4518 initializer-list. If the initializer can initialize a member,
4519 the member is initialized. Otherwise, if the member is itself a
4520 non-empty subaggregate, brace elision is assumed and the
4521 initializer is considered for the initialization of the first
4522 member of the subaggregate. */
4523 if (TREE_CODE (init) != CONSTRUCTOR
4524 && can_convert_arg (type, TREE_TYPE (init), init, LOOKUP_NORMAL))
4530 /* [dcl.init.string]
4532 A char array (whether plain char, signed char, or unsigned char)
4533 can be initialized by a string-literal (optionally enclosed in
4534 braces); a wchar_t array can be initialized by a wide
4535 string-literal (optionally enclosed in braces). */
4536 if (TREE_CODE (type) == ARRAY_TYPE
4537 && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type))))
4539 tree str_init = init;
4541 /* Strip one level of braces if and only if they enclose a single
4542 element (as allowed by [dcl.init.string]). */
4543 if (!first_initializer_p
4544 && TREE_CODE (str_init) == CONSTRUCTOR
4545 && VEC_length (constructor_elt, CONSTRUCTOR_ELTS (str_init)) == 1)
4547 str_init = VEC_index (constructor_elt,
4548 CONSTRUCTOR_ELTS (str_init), 0)->value;
4551 /* If it's a string literal, then it's the initializer for the array
4552 as a whole. Otherwise, continue with normal initialization for
4553 array types (one value per array element). */
4554 if (TREE_CODE (str_init) == STRING_CST)
4561 /* The following cases are about aggregates. If we are not within a full
4562 initializer already, and there is not a CONSTRUCTOR, it means that there
4563 is a missing set of braces (that is, we are processing the case for
4564 which reshape_init exists). */
4565 if (!first_initializer_p)
4567 if (TREE_CODE (init) == CONSTRUCTOR)
4569 /* For a nested compound literal, there is no need to reshape since
4570 brace elision is not allowed. Even if we decided to allow it,
4571 we should add a call to reshape_init in finish_compound_literal,
4572 before calling digest_init, so changing this code would still
4573 not be necessary. */
4574 if (!COMPOUND_LITERAL_P (init))
4577 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init));
4578 return reshape_init (type, init);
4581 gcc_assert (!BRACE_ENCLOSED_INITIALIZER_P (init));
4584 warning (OPT_Wmissing_braces, "missing braces around initializer for %qT",
4588 /* Dispatch to specialized routines. */
4589 if (CLASS_TYPE_P (type))
4590 return reshape_init_class (type, d, first_initializer_p);
4591 else if (TREE_CODE (type) == ARRAY_TYPE)
4592 return reshape_init_array (type, d);
4593 else if (TREE_CODE (type) == VECTOR_TYPE)
4594 return reshape_init_vector (type, d);
4599 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
4600 brace-enclosed aggregate initializer.
4602 INIT is the CONSTRUCTOR containing the list of initializers describing
4603 a brace-enclosed initializer for an entity of the indicated aggregate TYPE.
4604 It may not presently match the shape of the TYPE; for example:
4606 struct S { int a; int b; };
4607 struct S a[] = { 1, 2, 3, 4 };
4609 Here INIT will hold a VEC of four elements, rather than a
4610 VEC of two elements, each itself a VEC of two elements. This
4611 routine transforms INIT from the former form into the latter. The
4612 revised CONSTRUCTOR node is returned. */
4615 reshape_init (tree type, tree init)
4617 VEC(constructor_elt, gc) *v;
4621 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init));
4623 v = CONSTRUCTOR_ELTS (init);
4625 /* An empty constructor does not need reshaping, and it is always a valid
4627 if (VEC_empty (constructor_elt, v))
4630 /* Recurse on this CONSTRUCTOR. */
4631 d.cur = VEC_index (constructor_elt, v, 0);
4632 d.end = d.cur + VEC_length (constructor_elt, v);
4634 new_init = reshape_init_r (type, &d, true);
4635 if (new_init == error_mark_node)
4636 return error_mark_node;
4638 /* Make sure all the element of the constructor were used. Otherwise,
4639 issue an error about exceeding initializers. */
4641 error ("too many initializers for %qT", type);
4646 /* Verify INIT (the initializer for DECL), and record the
4647 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
4648 grok_reference_init.
4650 If the return value is non-NULL, it is an expression that must be
4651 evaluated dynamically to initialize DECL. */
4654 check_initializer (tree decl, tree init, int flags, tree *cleanup)
4656 tree type = TREE_TYPE (decl);
4657 tree init_code = NULL;
4659 /* Things that are going to be initialized need to have complete
4661 TREE_TYPE (decl) = type = complete_type (TREE_TYPE (decl));
4663 if (type == error_mark_node)
4664 /* We will have already complained. */
4667 if (TREE_CODE (type) == ARRAY_TYPE)
4669 tree element_type = TREE_TYPE (type);
4671 /* The array type itself need not be complete, because the
4672 initializer may tell us how many elements are in the array.
4673 But, the elements of the array must be complete. */
4674 if (!COMPLETE_TYPE_P (complete_type (element_type)))
4676 error ("elements of array %q#D have incomplete type", decl);
4679 /* It is not valid to initialize an a VLA. */
4681 && ((COMPLETE_TYPE_P (type) && !TREE_CONSTANT (TYPE_SIZE (type)))
4682 || !TREE_CONSTANT (TYPE_SIZE (element_type))))
4684 error ("variable-sized object %qD may not be initialized", decl);
4688 else if (!COMPLETE_TYPE_P (type))
4690 error ("%qD has incomplete type", decl);
4691 TREE_TYPE (decl) = error_mark_node;
4695 /* There is no way to make a variable-sized class type in GNU C++. */
4696 gcc_assert (TREE_CONSTANT (TYPE_SIZE (type)));
4698 if (!CP_AGGREGATE_TYPE_P (type)
4699 && init && BRACE_ENCLOSED_INITIALIZER_P (init)
4700 && VEC_length (constructor_elt, CONSTRUCTOR_ELTS (init)) != 1)
4702 error ("scalar object %qD requires one element in initializer", decl);
4703 TREE_TYPE (decl) = error_mark_node;
4707 if (TREE_CODE (decl) == CONST_DECL)
4709 gcc_assert (TREE_CODE (type) != REFERENCE_TYPE);
4711 DECL_INITIAL (decl) = init;
4713 gcc_assert (init != NULL_TREE);
4716 else if (!DECL_EXTERNAL (decl) && TREE_CODE (type) == REFERENCE_TYPE)
4717 init = grok_reference_init (decl, type, init, cleanup);
4720 /* Do not reshape constructors of vectors (they don't need to be
4722 if (TREE_CODE (init) == CONSTRUCTOR
4723 && !COMPOUND_LITERAL_P (init)
4724 && !TREE_TYPE (init)) /* ptrmemfunc */
4726 init = reshape_init (type, init);
4728 if ((*targetm.vector_opaque_p) (type))
4730 error ("opaque vector types cannot be initialized");
4731 init = error_mark_node;
4735 /* If DECL has an array type without a specific bound, deduce the
4736 array size from the initializer. */
4737 maybe_deduce_size_from_array_init (decl, init);
4738 type = TREE_TYPE (decl);
4739 if (type == error_mark_node)
4742 if (TYPE_HAS_CONSTRUCTOR (type) || TYPE_NEEDS_CONSTRUCTING (type))
4744 if (TREE_CODE (type) == ARRAY_TYPE)
4745 goto initialize_aggr;
4746 else if (TREE_CODE (init) == CONSTRUCTOR)
4748 if (TYPE_NON_AGGREGATE_CLASS (type))
4750 error ("%qD must be initialized by constructor, "
4753 init = error_mark_node;
4756 goto dont_use_constructor;
4760 int saved_stmts_are_full_exprs_p;
4763 saved_stmts_are_full_exprs_p = 0;
4764 if (building_stmt_tree ())
4766 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
4767 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
4769 init = build_aggr_init (decl, init, flags);
4770 if (building_stmt_tree ())
4771 current_stmt_tree ()->stmts_are_full_exprs_p =
4772 saved_stmts_are_full_exprs_p;
4778 dont_use_constructor:
4779 if (TREE_CODE (init) != TREE_VEC)
4781 init_code = store_init_value (decl, init);
4782 if (pedantic && TREE_CODE (type) == ARRAY_TYPE
4783 && DECL_INITIAL (decl)
4784 && TREE_CODE (DECL_INITIAL (decl)) == STRING_CST
4785 && PAREN_STRING_LITERAL_P (DECL_INITIAL (decl)))
4786 warning (0, "array %qD initialized by parenthesized string literal %qE",
4787 decl, DECL_INITIAL (decl));
4792 else if (DECL_EXTERNAL (decl))
4794 else if (TYPE_P (type) && TYPE_NEEDS_CONSTRUCTING (type))
4795 goto initialize_aggr;
4796 else if (IS_AGGR_TYPE (type))
4798 tree core_type = strip_array_types (type);
4800 if (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type))
4801 error ("structure %qD with uninitialized const members", decl);
4802 if (CLASSTYPE_REF_FIELDS_NEED_INIT (core_type))
4803 error ("structure %qD with uninitialized reference members", decl);
4805 check_for_uninitialized_const_var (decl);
4808 check_for_uninitialized_const_var (decl);
4810 if (init && init != error_mark_node)
4811 init_code = build2 (INIT_EXPR, type, decl, init);
4816 /* If DECL is not a local variable, give it RTL. */
4819 make_rtl_for_nonlocal_decl (tree decl, tree init, const char* asmspec)
4821 int toplev = toplevel_bindings_p ();
4823 const char *filename;
4825 /* Set the DECL_ASSEMBLER_NAME for the object. */
4828 /* The `register' keyword, when used together with an
4829 asm-specification, indicates that the variable should be
4830 placed in a particular register. */
4831 if (TREE_CODE (decl) == VAR_DECL && DECL_REGISTER (decl))
4833 set_user_assembler_name (decl, asmspec);
4834 DECL_HARD_REGISTER (decl) = 1;
4838 if (TREE_CODE (decl) == FUNCTION_DECL
4839 && DECL_BUILT_IN_CLASS (decl) == BUILT_IN_NORMAL)
4840 set_builtin_user_assembler_name (decl, asmspec);
4841 set_user_assembler_name (decl, asmspec);
4845 /* Handle non-variables up front. */
4846 if (TREE_CODE (decl) != VAR_DECL)
4848 rest_of_decl_compilation (decl, toplev, at_eof);
4852 /* If we see a class member here, it should be a static data
4854 if (DECL_LANG_SPECIFIC (decl) && DECL_IN_AGGR_P (decl))
4856 gcc_assert (TREE_STATIC (decl));
4857 /* An in-class declaration of a static data member should be
4858 external; it is only a declaration, and not a definition. */
4859 if (init == NULL_TREE)
4860 gcc_assert (DECL_EXTERNAL (decl));
4863 /* We don't create any RTL for local variables. */
4864 if (DECL_FUNCTION_SCOPE_P (decl) && !TREE_STATIC (decl))
4867 /* We defer emission of local statics until the corresponding
4868 DECL_EXPR is expanded. */
4869 defer_p = DECL_FUNCTION_SCOPE_P (decl) || DECL_VIRTUAL_P (decl);
4871 /* We try to defer namespace-scope static constants so that they are
4872 not emitted into the object file unnecessarily. */
4873 filename = input_filename;
4874 if (!DECL_VIRTUAL_P (decl)
4875 && TREE_READONLY (decl)
4876 && DECL_INITIAL (decl) != NULL_TREE
4877 && DECL_INITIAL (decl) != error_mark_node
4879 && ! EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl))
4881 && !TREE_PUBLIC (decl))
4883 /* Fool with the linkage of static consts according to #pragma
4885 struct c_fileinfo *finfo = get_fileinfo (filename);
4886 if (!finfo->interface_unknown && !TREE_PUBLIC (decl))
4888 TREE_PUBLIC (decl) = 1;
4889 DECL_EXTERNAL (decl) = finfo->interface_only;
4894 /* Likewise for template instantiations. */
4895 else if (DECL_LANG_SPECIFIC (decl)
4896 && DECL_IMPLICIT_INSTANTIATION (decl))
4899 /* If we're not deferring, go ahead and assemble the variable. */
4901 rest_of_decl_compilation (decl, toplev, at_eof);
4904 /* Generate code to initialize DECL (a local variable). */
4907 initialize_local_var (tree decl, tree init)
4909 tree type = TREE_TYPE (decl);
4912 gcc_assert (TREE_CODE (decl) == VAR_DECL
4913 || TREE_CODE (decl) == RESULT_DECL);
4914 gcc_assert (!TREE_STATIC (decl));
4916 if (DECL_SIZE (decl) == NULL_TREE)
4918 /* If we used it already as memory, it must stay in memory. */
4919 DECL_INITIAL (decl) = NULL_TREE;
4920 TREE_ADDRESSABLE (decl) = TREE_USED (decl);
4923 if (DECL_SIZE (decl) && type != error_mark_node)
4927 /* Compute and store the initial value. */
4928 already_used = TREE_USED (decl) || TREE_USED (type);
4930 /* Perform the initialization. */
4933 int saved_stmts_are_full_exprs_p;
4935 gcc_assert (building_stmt_tree ());
4936 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
4937 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
4938 finish_expr_stmt (init);
4939 current_stmt_tree ()->stmts_are_full_exprs_p =
4940 saved_stmts_are_full_exprs_p;
4943 /* Set this to 0 so we can tell whether an aggregate which was
4944 initialized was ever used. Don't do this if it has a
4945 destructor, so we don't complain about the 'resource
4946 allocation is initialization' idiom. Now set
4947 attribute((unused)) on types so decls of that type will be
4948 marked used. (see TREE_USED, above.) */
4949 if (TYPE_NEEDS_CONSTRUCTING (type)
4951 && TYPE_HAS_TRIVIAL_DESTRUCTOR (type)
4952 && DECL_NAME (decl))
4953 TREE_USED (decl) = 0;
4954 else if (already_used)
4955 TREE_USED (decl) = 1;
4958 /* Generate a cleanup, if necessary. */
4959 cleanup = cxx_maybe_build_cleanup (decl);
4960 if (DECL_SIZE (decl) && cleanup)
4961 finish_decl_cleanup (decl, cleanup);
4964 /* DECL is a VAR_DECL for a compiler-generated variable with static
4965 storage duration (like a virtual table) whose initializer is a
4966 compile-time constant. INIT must be either a TREE_LIST of values,
4967 or a CONSTRUCTOR. Initialize the variable and provide it to the
4971 initialize_artificial_var (tree decl, tree init)
4973 gcc_assert (DECL_ARTIFICIAL (decl));
4974 if (TREE_CODE (init) == TREE_LIST)
4975 init = build_constructor_from_list (NULL_TREE, init);
4976 gcc_assert (TREE_CODE (init) == CONSTRUCTOR);
4977 DECL_INITIAL (decl) = init;
4978 DECL_INITIALIZED_P (decl) = 1;
4979 determine_visibility (decl);
4980 layout_var_decl (decl);
4981 maybe_commonize_var (decl);
4982 make_rtl_for_nonlocal_decl (decl, init, /*asmspec=*/NULL);
4985 /* Finish processing of a declaration;
4986 install its line number and initial value.
4987 If the length of an array type is not known before,
4988 it must be determined now, from the initial value, or it is an error.
4990 INIT is the initializer (if any) for DECL. If INIT_CONST_EXPR_P is
4991 true, then INIT is an integral constant expression.
4993 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
4994 if the (init) syntax was used. */
4997 cp_finish_decl (tree decl, tree init, bool init_const_expr_p,
4998 tree asmspec_tree, int flags)
5002 const char *asmspec = NULL;
5003 int was_readonly = 0;
5004 bool var_definition_p = false;
5005 int saved_processing_template_decl;
5007 if (decl == error_mark_node)
5012 error ("assignment (not initialization) in declaration");
5016 gcc_assert (TREE_CODE (decl) != RESULT_DECL);
5017 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
5018 gcc_assert (TREE_CODE (decl) != PARM_DECL);
5020 type = TREE_TYPE (decl);
5021 if (type == error_mark_node)
5024 /* Assume no cleanup is required. */
5025 cleanup = NULL_TREE;
5026 saved_processing_template_decl = processing_template_decl;
5028 /* If a name was specified, get the string. */
5029 if (global_scope_p (current_binding_level))
5030 asmspec_tree = maybe_apply_renaming_pragma (decl, asmspec_tree);
5031 if (asmspec_tree && asmspec_tree != error_mark_node)
5032 asmspec = TREE_STRING_POINTER (asmspec_tree);
5034 if (current_class_type
5035 && CP_DECL_CONTEXT (decl) == current_class_type
5036 && TYPE_BEING_DEFINED (current_class_type)
5037 && (DECL_INITIAL (decl) || init))
5038 DECL_INITIALIZED_IN_CLASS_P (decl) = 1;
5040 if (processing_template_decl)
5042 bool type_dependent_p;
5044 /* Add this declaration to the statement-tree. */
5045 if (at_function_scope_p ())
5046 add_decl_expr (decl);
5048 type_dependent_p = dependent_type_p (type);
5050 if (init && init_const_expr_p)
5052 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl) = 1;
5053 if (DECL_INTEGRAL_CONSTANT_VAR_P (decl))
5054 TREE_CONSTANT (decl) = 1;
5058 || !DECL_CLASS_SCOPE_P (decl)
5059 || !DECL_INTEGRAL_CONSTANT_VAR_P (decl)
5061 || value_dependent_expression_p (init))
5064 DECL_INITIAL (decl) = init;
5065 if (TREE_CODE (decl) == VAR_DECL
5066 && !DECL_PRETTY_FUNCTION_P (decl)
5067 && !type_dependent_p)
5068 maybe_deduce_size_from_array_init (decl, init);
5072 init = fold_non_dependent_expr (init);
5073 processing_template_decl = 0;
5076 /* Take care of TYPE_DECLs up front. */
5077 if (TREE_CODE (decl) == TYPE_DECL)
5079 if (type != error_mark_node
5080 && IS_AGGR_TYPE (type) && DECL_NAME (decl))
5082 if (TREE_TYPE (DECL_NAME (decl)) && TREE_TYPE (decl) != type)
5083 warning (0, "shadowing previous type declaration of %q#D", decl);
5084 set_identifier_type_value (DECL_NAME (decl), decl);
5087 /* If we have installed this as the canonical typedef for this
5088 type, and that type has not been defined yet, delay emitting
5089 the debug information for it, as we will emit it later. */
5090 if (TYPE_MAIN_DECL (TREE_TYPE (decl)) == decl
5091 && !COMPLETE_TYPE_P (TREE_TYPE (decl)))
5092 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
5094 rest_of_decl_compilation (decl, DECL_CONTEXT (decl) == NULL_TREE,
5099 /* A reference will be modified here, as it is initialized. */
5100 if (! DECL_EXTERNAL (decl)
5101 && TREE_READONLY (decl)
5102 && TREE_CODE (type) == REFERENCE_TYPE)
5105 TREE_READONLY (decl) = 0;
5108 if (TREE_CODE (decl) == VAR_DECL)
5110 /* Only PODs can have thread-local storage. Other types may require
5111 various kinds of non-trivial initialization. */
5112 if (DECL_THREAD_LOCAL_P (decl) && !pod_type_p (TREE_TYPE (decl)))
5113 error ("%qD cannot be thread-local because it has non-POD type %qT",
5114 decl, TREE_TYPE (decl));
5115 /* If this is a local variable that will need a mangled name,
5116 register it now. We must do this before processing the
5117 initializer for the variable, since the initialization might
5118 require a guard variable, and since the mangled name of the
5119 guard variable will depend on the mangled name of this
5121 if (!processing_template_decl
5122 && DECL_FUNCTION_SCOPE_P (decl)
5123 && TREE_STATIC (decl)
5124 && !DECL_ARTIFICIAL (decl))
5125 push_local_name (decl);
5126 /* Convert the initializer to the type of DECL, if we have not
5127 already initialized DECL. */
5128 if (!DECL_INITIALIZED_P (decl)
5129 /* If !DECL_EXTERNAL then DECL is being defined. In the
5130 case of a static data member initialized inside the
5131 class-specifier, there can be an initializer even if DECL
5132 is *not* defined. */
5133 && (!DECL_EXTERNAL (decl) || init))
5137 DECL_NONTRIVIALLY_INITIALIZED_P (decl) = 1;
5138 if (init_const_expr_p)
5140 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl) = 1;
5141 if (DECL_INTEGRAL_CONSTANT_VAR_P (decl))
5142 TREE_CONSTANT (decl) = 1;
5145 init = check_initializer (decl, init, flags, &cleanup);
5146 /* Thread-local storage cannot be dynamically initialized. */
5147 if (DECL_THREAD_LOCAL_P (decl) && init)
5149 error ("%qD is thread-local and so cannot be dynamically "
5150 "initialized", decl);
5154 /* Check that the initializer for a static data member was a
5155 constant. Although we check in the parser that the
5156 initializer is an integral constant expression, we do not
5157 simplify division-by-zero at the point at which it
5158 occurs. Therefore, in:
5160 struct S { static const int i = 7 / 0; };
5162 we issue an error at this point. It would
5163 probably be better to forbid division by zero in
5164 integral constant expressions. */
5165 if (DECL_EXTERNAL (decl) && init)
5167 error ("%qD cannot be initialized by a non-constant expression"
5168 " when being declared", decl);
5169 DECL_INITIALIZED_IN_CLASS_P (decl) = 0;
5177 The memory occupied by any object of static storage
5178 duration is zero-initialized at program startup before
5179 any other initialization takes place.
5181 We cannot create an appropriate initializer until after
5182 the type of DECL is finalized. If DECL_INITIAL is set,
5183 then the DECL is statically initialized, and any
5184 necessary zero-initialization has already been performed. */
5185 if (TREE_STATIC (decl) && !DECL_INITIAL (decl))
5186 DECL_INITIAL (decl) = build_zero_init (TREE_TYPE (decl),
5187 /*nelts=*/NULL_TREE,
5188 /*static_storage_p=*/true);
5189 /* Remember that the initialization for this variable has
5191 DECL_INITIALIZED_P (decl) = 1;
5192 /* This declaration is the definition of this variable,
5193 unless we are initializing a static data member within
5194 the class specifier. */
5195 if (!DECL_EXTERNAL (decl))
5196 var_definition_p = true;
5198 /* If the variable has an array type, lay out the type, even if
5199 there is no initializer. It is valid to index through the
5200 array, and we must get TYPE_ALIGN set correctly on the array
5202 else if (TREE_CODE (type) == ARRAY_TYPE)
5206 /* Add this declaration to the statement-tree. This needs to happen
5207 after the call to check_initializer so that the DECL_EXPR for a
5208 reference temp is added before the DECL_EXPR for the reference itself. */
5209 if (at_function_scope_p ())
5210 add_decl_expr (decl);
5212 /* Let the middle end know about variables and functions -- but not
5213 static data members in uninstantiated class templates. */
5214 if (!saved_processing_template_decl
5215 && (TREE_CODE (decl) == VAR_DECL
5216 || TREE_CODE (decl) == FUNCTION_DECL))
5218 if (TREE_CODE (decl) == VAR_DECL)
5220 layout_var_decl (decl);
5221 maybe_commonize_var (decl);
5222 if (DECL_NAMESPACE_SCOPE_P (decl) && !TREE_PUBLIC (decl)
5223 && !DECL_THIS_STATIC (decl) && !DECL_ARTIFICIAL (decl))
5225 /* This is a const variable with implicit 'static'. Set
5226 DECL_THIS_STATIC so we can tell it from variables that are
5227 !TREE_PUBLIC because of the anonymous namespace. */
5228 DECL_THIS_STATIC (decl) = 1;
5232 make_rtl_for_nonlocal_decl (decl, init, asmspec);
5234 /* Check for abstractness of the type. Notice that there is no
5235 need to strip array types here since the check for those types
5236 is already done within create_array_type_for_decl. */
5237 if (TREE_CODE (type) == FUNCTION_TYPE
5238 || TREE_CODE (type) == METHOD_TYPE)
5239 abstract_virtuals_error (decl, TREE_TYPE (type));
5241 abstract_virtuals_error (decl, type);
5243 /* This needs to happen after the linkage is set. */
5244 determine_visibility (decl);
5246 if (TREE_CODE (decl) == FUNCTION_DECL
5247 || TREE_TYPE (decl) == error_mark_node)
5248 /* No initialization required. */
5250 else if (DECL_EXTERNAL (decl)
5251 && ! (DECL_LANG_SPECIFIC (decl)
5252 && DECL_NOT_REALLY_EXTERN (decl)))
5255 DECL_INITIAL (decl) = init;
5259 /* A variable definition. */
5260 if (DECL_FUNCTION_SCOPE_P (decl))
5262 /* Initialize the local variable. */
5263 if (processing_template_decl)
5264 DECL_INITIAL (decl) = init;
5265 else if (!TREE_STATIC (decl))
5266 initialize_local_var (decl, init);
5269 /* If a variable is defined, and then a subsequent
5270 definition with external linkage is encountered, we will
5271 get here twice for the same variable. We want to avoid
5272 calling expand_static_init more than once. For variables
5273 that are not static data members, we can call
5274 expand_static_init only when we actually process the
5275 initializer. It is not legal to redeclare a static data
5276 member, so this issue does not arise in that case. */
5277 if (var_definition_p && TREE_STATIC (decl))
5278 expand_static_init (decl, init);
5282 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
5283 reference, insert it in the statement-tree now. */
5285 push_cleanup (decl, cleanup, false);
5288 processing_template_decl = saved_processing_template_decl;
5291 TREE_READONLY (decl) = 1;
5293 /* If this was marked 'used', be sure it will be output. */
5294 if (lookup_attribute ("used", DECL_ATTRIBUTES (decl)))
5295 mark_decl_referenced (decl);
5298 /* This is here for a midend callback from c-common.c. */
5301 finish_decl (tree decl, tree init, tree asmspec_tree)
5303 cp_finish_decl (decl, init, /*init_const_expr_p=*/false, asmspec_tree, 0);
5306 /* Returns a declaration for a VAR_DECL as if:
5308 extern "C" TYPE NAME;
5310 had been seen. Used to create compiler-generated global
5314 declare_global_var (tree name, tree type)
5318 push_to_top_level ();
5319 decl = build_decl (VAR_DECL, name, type);
5320 TREE_PUBLIC (decl) = 1;
5321 DECL_EXTERNAL (decl) = 1;
5322 DECL_ARTIFICIAL (decl) = 1;
5323 /* If the user has explicitly declared this variable (perhaps
5324 because the code we are compiling is part of a low-level runtime
5325 library), then it is possible that our declaration will be merged
5326 with theirs by pushdecl. */
5327 decl = pushdecl (decl);
5328 finish_decl (decl, NULL_TREE, NULL_TREE);
5329 pop_from_top_level ();
5334 /* Returns a pointer to the `atexit' function. Note that if
5335 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
5336 `__cxa_atexit' function specified in the IA64 C++ ABI. */
5339 get_atexit_node (void)
5346 bool use_aeabi_atexit;
5351 if (flag_use_cxa_atexit && !targetm.cxx.use_atexit_for_cxa_atexit ())
5353 /* The declaration for `__cxa_atexit' is:
5355 int __cxa_atexit (void (*)(void *), void *, void *)
5357 We build up the argument types and then then function type
5360 use_aeabi_atexit = targetm.cxx.use_aeabi_atexit ();
5361 /* First, build the pointer-to-function type for the first
5363 arg_types = tree_cons (NULL_TREE, ptr_type_node, void_list_node);
5364 fn_type = build_function_type (void_type_node, arg_types);
5365 fn_ptr_type = build_pointer_type (fn_type);
5366 /* Then, build the rest of the argument types. */
5367 arg_types = tree_cons (NULL_TREE, ptr_type_node, void_list_node);
5368 if (use_aeabi_atexit)
5370 arg_types = tree_cons (NULL_TREE, fn_ptr_type, arg_types);
5371 arg_types = tree_cons (NULL_TREE, ptr_type_node, arg_types);
5375 arg_types = tree_cons (NULL_TREE, ptr_type_node, arg_types);
5376 arg_types = tree_cons (NULL_TREE, fn_ptr_type, arg_types);
5378 /* And the final __cxa_atexit type. */
5379 fn_type = build_function_type (integer_type_node, arg_types);
5380 fn_ptr_type = build_pointer_type (fn_type);
5381 if (use_aeabi_atexit)
5382 name = "__aeabi_atexit";
5384 name = "__cxa_atexit";
5388 /* The declaration for `atexit' is:
5390 int atexit (void (*)());
5392 We build up the argument types and then then function type
5394 fn_type = build_function_type (void_type_node, void_list_node);
5395 fn_ptr_type = build_pointer_type (fn_type);
5396 arg_types = tree_cons (NULL_TREE, fn_ptr_type, void_list_node);
5397 /* Build the final atexit type. */
5398 fn_type = build_function_type (integer_type_node, arg_types);
5402 /* Now, build the function declaration. */
5403 push_lang_context (lang_name_c);
5404 atexit_fndecl = build_library_fn_ptr (name, fn_type);
5405 mark_used (atexit_fndecl);
5406 pop_lang_context ();
5407 atexit_node = decay_conversion (atexit_fndecl);
5412 /* Returns the __dso_handle VAR_DECL. */
5415 get_dso_handle_node (void)
5417 if (dso_handle_node)
5418 return dso_handle_node;
5420 /* Declare the variable. */
5421 dso_handle_node = declare_global_var (get_identifier ("__dso_handle"),
5424 return dso_handle_node;
5427 /* Begin a new function with internal linkage whose job will be simply
5428 to destroy some particular variable. */
5430 static GTY(()) int start_cleanup_cnt;
5433 start_cleanup_fn (void)
5439 bool use_cxa_atexit = flag_use_cxa_atexit
5440 && !targetm.cxx.use_atexit_for_cxa_atexit ();
5442 push_to_top_level ();
5444 /* No need to mangle this. */
5445 push_lang_context (lang_name_c);
5447 /* Build the parameter-types. */
5448 parmtypes = void_list_node;
5449 /* Functions passed to __cxa_atexit take an additional parameter.
5450 We'll just ignore it. After we implement the new calling
5451 convention for destructors, we can eliminate the use of
5452 additional cleanup functions entirely in the -fnew-abi case. */
5454 parmtypes = tree_cons (NULL_TREE, ptr_type_node, parmtypes);
5455 /* Build the function type itself. */
5456 fntype = build_function_type (void_type_node, parmtypes);
5457 /* Build the name of the function. */
5458 sprintf (name, "__tcf_%d", start_cleanup_cnt++);
5459 /* Build the function declaration. */
5460 fndecl = build_lang_decl (FUNCTION_DECL, get_identifier (name), fntype);
5461 /* It's a function with internal linkage, generated by the
5463 TREE_PUBLIC (fndecl) = 0;
5464 DECL_ARTIFICIAL (fndecl) = 1;
5465 /* Make the function `inline' so that it is only emitted if it is
5466 actually needed. It is unlikely that it will be inlined, since
5467 it is only called via a function pointer, but we avoid unnecessary
5468 emissions this way. */
5469 DECL_INLINE (fndecl) = 1;
5470 DECL_DECLARED_INLINE_P (fndecl) = 1;
5471 DECL_INTERFACE_KNOWN (fndecl) = 1;
5472 /* Build the parameter. */
5477 parmdecl = cp_build_parm_decl (NULL_TREE, ptr_type_node);
5478 DECL_CONTEXT (parmdecl) = fndecl;
5479 TREE_USED (parmdecl) = 1;
5480 DECL_ARGUMENTS (fndecl) = parmdecl;
5484 start_preparsed_function (fndecl, NULL_TREE, SF_PRE_PARSED);
5486 pop_lang_context ();
5488 return current_function_decl;
5491 /* Finish the cleanup function begun by start_cleanup_fn. */
5494 end_cleanup_fn (void)
5496 expand_or_defer_fn (finish_function (0));
5498 pop_from_top_level ();
5501 /* Generate code to handle the destruction of DECL, an object with
5502 static storage duration. */
5505 register_dtor_fn (tree decl)
5512 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
5513 return void_zero_node;
5515 /* Call build_cleanup before we enter the anonymous function so that
5516 any access checks will be done relative to the current scope,
5517 rather than the scope of the anonymous function. */
5518 build_cleanup (decl);
5520 /* Now start the function. */
5521 cleanup = start_cleanup_fn ();
5523 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
5524 to the original function, rather than the anonymous one. That
5525 will make the back-end think that nested functions are in use,
5526 which causes confusion. */
5528 push_deferring_access_checks (dk_no_check);
5529 fcall = build_cleanup (decl);
5530 pop_deferring_access_checks ();
5532 /* Create the body of the anonymous function. */
5533 compound_stmt = begin_compound_stmt (BCS_FN_BODY);
5534 finish_expr_stmt (fcall);
5535 finish_compound_stmt (compound_stmt);
5538 /* Call atexit with the cleanup function. */
5539 cxx_mark_addressable (cleanup);
5540 mark_used (cleanup);
5541 cleanup = build_unary_op (ADDR_EXPR, cleanup, 0);
5542 if (flag_use_cxa_atexit && !targetm.cxx.use_atexit_for_cxa_atexit ())
5544 args = tree_cons (NULL_TREE,
5545 build_unary_op (ADDR_EXPR, get_dso_handle_node (), 0),
5547 if (targetm.cxx.use_aeabi_atexit ())
5549 args = tree_cons (NULL_TREE, cleanup, args);
5550 args = tree_cons (NULL_TREE, null_pointer_node, args);
5554 args = tree_cons (NULL_TREE, null_pointer_node, args);
5555 args = tree_cons (NULL_TREE, cleanup, args);
5559 args = tree_cons (NULL_TREE, cleanup, NULL_TREE);
5560 return build_function_call (get_atexit_node (), args);
5563 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
5564 is its initializer. Generate code to handle the construction
5565 and destruction of DECL. */
5568 expand_static_init (tree decl, tree init)
5570 gcc_assert (TREE_CODE (decl) == VAR_DECL);
5571 gcc_assert (TREE_STATIC (decl));
5573 /* Some variables require no initialization. */
5575 && !TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl))
5576 && TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
5579 if (DECL_FUNCTION_SCOPE_P (decl))
5581 /* Emit code to perform this initialization but once. */
5582 tree if_stmt = NULL_TREE, inner_if_stmt = NULL_TREE;
5583 tree then_clause = NULL_TREE, inner_then_clause = NULL_TREE;
5584 tree guard, guard_addr, guard_addr_list;
5585 tree acquire_fn, release_fn, abort_fn;
5588 /* Emit code to perform this initialization but once. This code
5591 static <type> guard;
5592 if (!guard.first_byte) {
5593 if (__cxa_guard_acquire (&guard)) {
5596 // Do initialization.
5597 flag = true; __cxa_guard_release (&guard);
5598 // Register variable for destruction at end of program.
5600 if (!flag) __cxa_guard_abort (&guard);
5604 Note that the `flag' variable is only set to 1 *after* the
5605 initialization is complete. This ensures that an exception,
5606 thrown during the construction, will cause the variable to
5607 reinitialized when we pass through this code again, as per:
5611 If the initialization exits by throwing an exception, the
5612 initialization is not complete, so it will be tried again
5613 the next time control enters the declaration.
5615 This process should be thread-safe, too; multiple threads
5616 should not be able to initialize the variable more than
5619 /* Create the guard variable. */
5620 guard = get_guard (decl);
5622 /* This optimization isn't safe on targets with relaxed memory
5623 consistency. On such targets we force synchronization in
5624 __cxa_guard_acquire. */
5625 if (!targetm.relaxed_ordering || !flag_threadsafe_statics)
5627 /* Begin the conditional initialization. */
5628 if_stmt = begin_if_stmt ();
5629 finish_if_stmt_cond (get_guard_cond (guard), if_stmt);
5630 then_clause = begin_compound_stmt (BCS_NO_SCOPE);
5633 if (flag_threadsafe_statics)
5635 guard_addr = build_address (guard);
5636 guard_addr_list = build_tree_list (NULL_TREE, guard_addr);
5638 acquire_fn = get_identifier ("__cxa_guard_acquire");
5639 release_fn = get_identifier ("__cxa_guard_release");
5640 abort_fn = get_identifier ("__cxa_guard_abort");
5641 if (!get_global_value_if_present (acquire_fn, &acquire_fn))
5643 tree argtypes = tree_cons (NULL_TREE, TREE_TYPE (guard_addr),
5645 tree vfntype = build_function_type (void_type_node, argtypes);
5646 acquire_fn = push_library_fn
5647 (acquire_fn, build_function_type (integer_type_node, argtypes));
5648 release_fn = push_library_fn (release_fn, vfntype);
5649 abort_fn = push_library_fn (abort_fn, vfntype);
5653 release_fn = identifier_global_value (release_fn);
5654 abort_fn = identifier_global_value (abort_fn);
5657 inner_if_stmt = begin_if_stmt ();
5658 finish_if_stmt_cond (build_call (acquire_fn, guard_addr_list),
5661 inner_then_clause = begin_compound_stmt (BCS_NO_SCOPE);
5662 begin = get_target_expr (boolean_false_node);
5663 flag = TARGET_EXPR_SLOT (begin);
5665 TARGET_EXPR_CLEANUP (begin)
5666 = build3 (COND_EXPR, void_type_node, flag,
5668 build_call (abort_fn, guard_addr_list));
5669 CLEANUP_EH_ONLY (begin) = 1;
5671 /* Do the initialization itself. */
5672 init = add_stmt_to_compound (begin, init);
5673 init = add_stmt_to_compound
5674 (init, build2 (MODIFY_EXPR, void_type_node, flag, boolean_true_node));
5675 init = add_stmt_to_compound
5676 (init, build_call (release_fn, guard_addr_list));
5679 init = add_stmt_to_compound (init, set_guard (guard));
5681 /* Use atexit to register a function for destroying this static
5683 init = add_stmt_to_compound (init, register_dtor_fn (decl));
5685 finish_expr_stmt (init);
5687 if (flag_threadsafe_statics)
5689 finish_compound_stmt (inner_then_clause);
5690 finish_then_clause (inner_if_stmt);
5691 finish_if_stmt (inner_if_stmt);
5694 if (!targetm.relaxed_ordering || !flag_threadsafe_statics)
5696 finish_compound_stmt (then_clause);
5697 finish_then_clause (if_stmt);
5698 finish_if_stmt (if_stmt);
5702 static_aggregates = tree_cons (init, decl, static_aggregates);
5706 /* Make TYPE a complete type based on INITIAL_VALUE.
5707 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
5708 2 if there was no information (in which case assume 0 if DO_DEFAULT),
5709 3 if the initializer list is empty (in pedantic mode). */
5712 cp_complete_array_type (tree *ptype, tree initial_value, bool do_default)
5715 tree type, elt_type;
5719 /* An array of character type can be initialized from a
5720 brace-enclosed string constant.
5722 FIXME: this code is duplicated from reshape_init. Probably
5723 we should just call reshape_init here? */
5724 if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (*ptype)))
5725 && TREE_CODE (initial_value) == CONSTRUCTOR
5726 && !VEC_empty (constructor_elt, CONSTRUCTOR_ELTS (initial_value)))
5728 VEC(constructor_elt,gc) *v = CONSTRUCTOR_ELTS (initial_value);
5729 tree value = VEC_index (constructor_elt, v, 0)->value;
5731 if (TREE_CODE (value) == STRING_CST
5732 && VEC_length (constructor_elt, v) == 1)
5733 initial_value = value;
5737 failure = complete_array_type (ptype, initial_value, do_default);
5739 /* We can create the array before the element type is complete, which
5740 means that we didn't have these two bits set in the original type
5741 either. In completing the type, we are expected to propagate these
5742 bits. See also complete_type which does the same thing for arrays
5745 if (TYPE_DOMAIN (type))
5747 elt_type = TREE_TYPE (type);
5748 TYPE_NEEDS_CONSTRUCTING (type) = TYPE_NEEDS_CONSTRUCTING (elt_type);
5749 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type)
5750 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (elt_type);
5756 /* Return zero if something is declared to be a member of type
5757 CTYPE when in the context of CUR_TYPE. STRING is the error
5758 message to print in that case. Otherwise, quietly return 1. */
5761 member_function_or_else (tree ctype, tree cur_type, enum overload_flags flags)
5763 if (ctype && ctype != cur_type)
5765 if (flags == DTOR_FLAG)
5766 error ("destructor for alien class %qT cannot be a member", ctype);
5768 error ("constructor for alien class %qT cannot be a member", ctype);
5774 /* Subroutine of `grokdeclarator'. */
5776 /* Generate errors possibly applicable for a given set of specifiers.
5777 This is for ARM $7.1.2. */
5780 bad_specifiers (tree object,
5789 error ("%qD declared as a %<virtual%> %s", object, type);
5791 error ("%qD declared as an %<inline%> %s", object, type);
5793 error ("%<const%> and %<volatile%> function specifiers on "
5794 "%qD invalid in %s declaration",
5797 error ("%q+D declared as a friend", object);
5799 && (TREE_CODE (object) == TYPE_DECL
5800 || (!TYPE_PTRFN_P (TREE_TYPE (object))
5801 && !TYPE_REFFN_P (TREE_TYPE (object))
5802 && !TYPE_PTRMEMFUNC_P (TREE_TYPE (object)))))
5803 error ("%q+D declared with an exception specification", object);
5806 /* DECL is a member function or static data member and is presently
5807 being defined. Check that the definition is taking place in a
5811 check_class_member_definition_namespace (tree decl)
5813 /* These checks only apply to member functions and static data
5815 gcc_assert (TREE_CODE (decl) == FUNCTION_DECL
5816 || TREE_CODE (decl) == VAR_DECL);
5817 /* We check for problems with specializations in pt.c in
5818 check_specialization_namespace, where we can issue better
5820 if (processing_specialization)
5822 /* There are no restrictions on the placement of
5823 explicit instantiations. */
5824 if (processing_explicit_instantiation)
5828 A member function definition that appears outside of the
5829 class definition shall appear in a namespace scope enclosing
5830 the class definition.
5834 The definition for a static data member shall appear in a
5835 namespace scope enclosing the member's class definition. */
5836 if (!is_ancestor (current_namespace, DECL_CONTEXT (decl)))
5837 pedwarn ("definition of %qD is not in namespace enclosing %qT",
5838 decl, DECL_CONTEXT (decl));
5841 /* Build a PARM_DECL for the "this" parameter. TYPE is the
5842 METHOD_TYPE for a non-static member function; QUALS are the
5843 cv-qualifiers that apply to the function. */
5846 build_this_parm (tree type, cp_cv_quals quals)
5851 cp_cv_quals this_quals;
5853 this_type = TREE_VALUE (TYPE_ARG_TYPES (type));
5854 /* The `this' parameter is implicitly `const'; it cannot be
5856 this_quals = (quals & TYPE_QUAL_RESTRICT) | TYPE_QUAL_CONST;
5857 qual_type = cp_build_qualified_type (this_type, this_quals);
5858 parm = build_artificial_parm (this_identifier, qual_type);
5859 cp_apply_type_quals_to_decl (this_quals, parm);
5863 /* CTYPE is class type, or null if non-class.
5864 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
5866 DECLARATOR is the function's name.
5867 PARMS is a chain of PARM_DECLs for the function.
5868 VIRTUALP is truthvalue of whether the function is virtual or not.
5869 FLAGS are to be passed through to `grokclassfn'.
5870 QUALS are qualifiers indicating whether the function is `const'
5872 RAISES is a list of exceptions that this function can raise.
5873 CHECK is 1 if we must find this method in CTYPE, 0 if we should
5874 not look, and -1 if we should not call `grokclassfn' at all.
5876 SFK is the kind of special function (if any) for the new function.
5878 Returns `NULL_TREE' if something goes wrong, after issuing
5879 applicable error messages. */
5882 grokfndecl (tree ctype,
5886 tree orig_declarator,
5888 enum overload_flags flags,
5895 special_function_kind sfk,
5902 int staticp = ctype && TREE_CODE (type) == FUNCTION_TYPE;
5906 type = build_exception_variant (type, raises);
5908 decl = build_lang_decl (FUNCTION_DECL, declarator, type);
5909 if (TREE_CODE (type) == METHOD_TYPE)
5912 parm = build_this_parm (type, quals);
5913 TREE_CHAIN (parm) = parms;
5916 DECL_ARGUMENTS (decl) = parms;
5917 /* Propagate volatile out from type to decl. */
5918 if (TYPE_VOLATILE (type))
5919 TREE_THIS_VOLATILE (decl) = 1;
5922 && TREE_CODE (orig_declarator) == TEMPLATE_ID_EXPR)
5926 ("defining explicit specialization %qD in friend declaration",
5930 tree fns = TREE_OPERAND (orig_declarator, 0);
5931 tree args = TREE_OPERAND (orig_declarator, 1);
5933 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
5935 /* Something like `template <class T> friend void f<T>()'. */
5936 error ("invalid use of template-id %qD in declaration "
5937 "of primary template",
5943 /* A friend declaration of the form friend void f<>(). Record
5944 the information in the TEMPLATE_ID_EXPR. */
5945 SET_DECL_IMPLICIT_INSTANTIATION (decl);
5947 if (TREE_CODE (fns) == COMPONENT_REF)
5949 /* Due to bison parser ickiness, we will have already looked
5950 up an operator_name or PFUNCNAME within the current class
5951 (see template_id in parse.y). If the current class contains
5952 such a name, we'll get a COMPONENT_REF here. Undo that. */
5954 gcc_assert (TREE_TYPE (TREE_OPERAND (fns, 0))
5955 == current_class_type);
5956 fns = TREE_OPERAND (fns, 1);
5958 gcc_assert (TREE_CODE (fns) == IDENTIFIER_NODE
5959 || TREE_CODE (fns) == OVERLOAD);
5960 DECL_TEMPLATE_INFO (decl) = tree_cons (fns, args, NULL_TREE);
5962 for (t = TYPE_ARG_TYPES (TREE_TYPE (decl)); t; t = TREE_CHAIN (t))
5963 if (TREE_PURPOSE (t)
5964 && TREE_CODE (TREE_PURPOSE (t)) == DEFAULT_ARG)
5966 error ("default arguments are not allowed in declaration "
5967 "of friend template specialization %qD",
5974 error ("%<inline%> is not allowed in declaration of friend "
5975 "template specialization %qD",
5982 /* If this decl has namespace scope, set that up. */
5984 set_decl_namespace (decl, in_namespace, friendp);
5986 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
5988 /* `main' and builtins have implicit 'C' linkage. */
5989 if ((MAIN_NAME_P (declarator)
5990 || (IDENTIFIER_LENGTH (declarator) > 10
5991 && IDENTIFIER_POINTER (declarator)[0] == '_'
5992 && IDENTIFIER_POINTER (declarator)[1] == '_'
5993 && strncmp (IDENTIFIER_POINTER (declarator)+2, "builtin_", 8) == 0))
5994 && current_lang_name == lang_name_cplusplus
5995 && ctype == NULL_TREE
5996 /* NULL_TREE means global namespace. */
5997 && DECL_CONTEXT (decl) == NULL_TREE)
5998 SET_DECL_LANGUAGE (decl, lang_c);
6000 /* Should probably propagate const out from type to decl I bet (mrs). */
6003 DECL_STATIC_FUNCTION_P (decl) = 1;
6004 DECL_CONTEXT (decl) = ctype;
6009 DECL_CONTEXT (decl) = ctype;
6011 check_class_member_definition_namespace (decl);
6014 if (ctype == NULL_TREE && DECL_MAIN_P (decl))
6016 if (processing_template_decl)
6017 error ("cannot declare %<::main%> to be a template");
6019 error ("cannot declare %<::main%> to be inline");
6021 error ("cannot declare %<::main%> to be static");
6022 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl)),
6025 tree oldtypeargs = TYPE_ARG_TYPES (TREE_TYPE (decl));
6027 error ("%<::main%> must return %<int%>");
6028 newtype = build_function_type (integer_type_node,
6030 TREE_TYPE (decl) = newtype;
6032 check_main_parameter_types (decl);
6037 /* Members of anonymous types and local classes have no linkage; make
6038 them internal. If a typedef is made later, this will be changed. */
6039 if (ctype && (TYPE_ANONYMOUS_P (ctype)
6040 || decl_function_context (TYPE_MAIN_DECL (ctype))))
6045 /* [basic.link]: A name with no linkage (notably, the name of a class
6046 or enumeration declared in a local scope) shall not be used to
6047 declare an entity with linkage.
6049 Only check this for public decls for now. See core 319, 389. */
6050 t = no_linkage_check (TREE_TYPE (decl),
6051 /*relaxed_p=*/false);
6054 if (TYPE_ANONYMOUS_P (t))
6056 if (DECL_EXTERN_C_P (decl))
6057 /* Allow this; it's pretty common in C. */;
6060 pedwarn ("non-local function %q#D uses anonymous type",
6062 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
6063 pedwarn ("%q+#D does not refer to the unqualified "
6064 "type, so it is not used for linkage",
6069 pedwarn ("non-local function %q#D uses local type %qT", decl, t);
6073 TREE_PUBLIC (decl) = publicp;
6076 DECL_INTERFACE_KNOWN (decl) = 1;
6077 DECL_NOT_REALLY_EXTERN (decl) = 1;
6080 /* If the declaration was declared inline, mark it as such. */
6082 DECL_DECLARED_INLINE_P (decl) = 1;
6083 /* We inline functions that are explicitly declared inline, or, when
6084 the user explicitly asks us to, all functions. */
6085 if (DECL_DECLARED_INLINE_P (decl)
6086 || (flag_inline_trees == 2 && !DECL_INLINE (decl) && funcdef_flag))
6087 DECL_INLINE (decl) = 1;
6089 DECL_EXTERNAL (decl) = 1;
6090 if (quals && TREE_CODE (type) == FUNCTION_TYPE)
6093 ? G_("static member function %qD cannot have cv-qualifier")
6094 : G_("non-member function %qD cannot have cv-qualifier"),
6096 quals = TYPE_UNQUALIFIED;
6099 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl))
6100 && !grok_op_properties (decl, /*complain=*/true))
6103 if (ctype && decl_function_context (decl))
6104 DECL_NO_STATIC_CHAIN (decl) = 1;
6107 /* Make the init_value nonzero so pushdecl knows this is not
6108 tentative. error_mark_node is replaced later with the BLOCK. */
6109 DECL_INITIAL (decl) = error_mark_node;
6111 if (TYPE_NOTHROW_P (type) || nothrow_libfn_p (decl))
6112 TREE_NOTHROW (decl) = 1;
6114 /* Caller will do the rest of this. */
6118 if (ctype != NULL_TREE)
6120 if (sfk == sfk_constructor)
6121 DECL_CONSTRUCTOR_P (decl) = 1;
6123 grokclassfn (ctype, decl, flags);
6126 decl = check_explicit_specialization (orig_declarator, decl,
6129 4 * (friendp != 0));
6130 if (decl == error_mark_node)
6135 cplus_decl_attributes (&decl, *attrlist, 0);
6136 *attrlist = NULL_TREE;
6139 if (ctype != NULL_TREE
6140 && (! TYPE_FOR_JAVA (ctype) || check_java_method (decl))
6145 old_decl = check_classfn (ctype, decl,
6146 (processing_template_decl
6147 > template_class_depth (ctype))
6148 ? current_template_parms
6155 if (TREE_CODE (old_decl) == TEMPLATE_DECL)
6156 /* Because grokfndecl is always supposed to return a
6157 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
6158 here. We depend on our callers to figure out that its
6159 really a template that's being returned. */
6160 old_decl = DECL_TEMPLATE_RESULT (old_decl);
6162 if (DECL_STATIC_FUNCTION_P (old_decl)
6163 && TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE)
6164 /* Remove the `this' parm added by grokclassfn.
6165 XXX Isn't this done in start_function, too? */
6166 revert_static_member_fn (decl);
6167 if (DECL_ARTIFICIAL (old_decl))
6168 error ("definition of implicitly-declared %qD", old_decl);
6170 /* Since we've smashed OLD_DECL to its
6171 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
6172 if (TREE_CODE (decl) == TEMPLATE_DECL)
6173 decl = DECL_TEMPLATE_RESULT (decl);
6175 /* Attempt to merge the declarations. This can fail, in
6176 the case of some invalid specialization declarations. */
6177 pushed_scope = push_scope (ctype);
6178 ok = duplicate_decls (decl, old_decl, friendp);
6180 pop_scope (pushed_scope);
6183 error ("no %q#D member function declared in class %qT",
6191 if (DECL_CONSTRUCTOR_P (decl) && !grok_ctor_properties (ctype, decl))
6194 if (ctype == NULL_TREE || check)
6198 DECL_VIRTUAL_P (decl) = 1;
6203 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
6204 the linkage that DECL will receive in the object file. */
6207 set_linkage_for_static_data_member (tree decl)
6209 /* A static data member always has static storage duration and
6210 external linkage. Note that static data members are forbidden in
6211 local classes -- the only situation in which a class has
6212 non-external linkage. */
6213 TREE_PUBLIC (decl) = 1;
6214 TREE_STATIC (decl) = 1;
6215 /* For non-template classes, static data members are always put
6216 out in exactly those files where they are defined, just as
6217 with ordinary namespace-scope variables. */
6218 if (!processing_template_decl)
6219 DECL_INTERFACE_KNOWN (decl) = 1;
6222 /* Create a VAR_DECL named NAME with the indicated TYPE.
6224 If SCOPE is non-NULL, it is the class type or namespace containing
6225 the variable. If SCOPE is NULL, the variable should is created in
6226 the innermost enclosings scope. */
6229 grokvardecl (tree type,
6231 const cp_decl_specifier_seq *declspecs,
6237 tree explicit_scope;
6239 gcc_assert (!name || TREE_CODE (name) == IDENTIFIER_NODE);
6241 /* Compute the scope in which to place the variable, but remember
6242 whether or not that scope was explicitly specified by the user. */
6243 explicit_scope = scope;
6246 /* An explicit "extern" specifier indicates a namespace-scope
6248 if (declspecs->storage_class == sc_extern)
6249 scope = current_namespace;
6250 else if (!at_function_scope_p ())
6251 scope = current_scope ();
6255 && (/* If the variable is a namespace-scope variable declared in a
6256 template, we need DECL_LANG_SPECIFIC. */
6257 (TREE_CODE (scope) == NAMESPACE_DECL && processing_template_decl)
6258 /* Similarly for namespace-scope variables with language linkage
6260 || (TREE_CODE (scope) == NAMESPACE_DECL
6261 && current_lang_name != lang_name_cplusplus)
6262 /* Similarly for static data members. */
6264 decl = build_lang_decl (VAR_DECL, name, type);
6266 decl = build_decl (VAR_DECL, name, type);
6268 if (explicit_scope && TREE_CODE (explicit_scope) == NAMESPACE_DECL)
6269 set_decl_namespace (decl, explicit_scope, 0);
6271 DECL_CONTEXT (decl) = FROB_CONTEXT (scope);
6273 if (declspecs->storage_class == sc_extern)
6275 DECL_THIS_EXTERN (decl) = 1;
6276 DECL_EXTERNAL (decl) = !initialized;
6279 if (DECL_CLASS_SCOPE_P (decl))
6281 set_linkage_for_static_data_member (decl);
6282 /* This function is only called with out-of-class definitions. */
6283 DECL_EXTERNAL (decl) = 0;
6284 check_class_member_definition_namespace (decl);
6286 /* At top level, either `static' or no s.c. makes a definition
6287 (perhaps tentative), and absence of `static' makes it public. */
6288 else if (toplevel_bindings_p ())
6290 TREE_PUBLIC (decl) = (declspecs->storage_class != sc_static
6291 && (DECL_THIS_EXTERN (decl) || ! constp));
6292 TREE_STATIC (decl) = ! DECL_EXTERNAL (decl);
6294 /* Not at top level, only `static' makes a static definition. */
6297 TREE_STATIC (decl) = declspecs->storage_class == sc_static;
6298 TREE_PUBLIC (decl) = DECL_EXTERNAL (decl);
6301 if (declspecs->specs[(int)ds_thread])
6303 if (targetm.have_tls)
6304 DECL_TLS_MODEL (decl) = decl_default_tls_model (decl);
6306 /* A mere warning is sure to result in improper semantics
6307 at runtime. Don't bother to allow this to compile. */
6308 error ("thread-local storage not supported for this target");
6311 if (TREE_PUBLIC (decl))
6313 /* [basic.link]: A name with no linkage (notably, the name of a class
6314 or enumeration declared in a local scope) shall not be used to
6315 declare an entity with linkage.
6317 Only check this for public decls for now. */
6318 tree t = no_linkage_check (TREE_TYPE (decl), /*relaxed_p=*/false);
6321 if (TYPE_ANONYMOUS_P (t))
6323 if (DECL_EXTERN_C_P (decl))
6324 /* Allow this; it's pretty common in C. */
6328 /* DRs 132, 319 and 389 seem to indicate types with
6329 no linkage can only be used to declare extern "C"
6330 entities. Since it's not always an error in the
6331 ISO C++ 90 Standard, we only issue a warning. */
6332 warning (0, "non-local variable %q#D uses anonymous type",
6334 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
6335 warning (0, "%q+#D does not refer to the unqualified "
6336 "type, so it is not used for linkage",
6341 warning (0, "non-local variable %q#D uses local type %qT", decl, t);
6345 DECL_INTERFACE_KNOWN (decl) = 1;
6350 /* Create and return a canonical pointer to member function type, for
6351 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
6354 build_ptrmemfunc_type (tree type)
6358 tree unqualified_variant = NULL_TREE;
6360 if (type == error_mark_node)
6363 /* If a canonical type already exists for this type, use it. We use
6364 this method instead of type_hash_canon, because it only does a
6365 simple equality check on the list of field members. */
6367 if ((t = TYPE_GET_PTRMEMFUNC_TYPE (type)))
6370 /* Make sure that we always have the unqualified pointer-to-member
6372 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
6374 = build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type));
6376 t = make_aggr_type (RECORD_TYPE);
6377 xref_basetypes (t, NULL_TREE);
6379 /* Let the front-end know this is a pointer to member function... */
6380 TYPE_PTRMEMFUNC_FLAG (t) = 1;
6381 /* ... and not really an aggregate. */
6382 SET_IS_AGGR_TYPE (t, 0);
6384 field = build_decl (FIELD_DECL, pfn_identifier, type);
6387 field = build_decl (FIELD_DECL, delta_identifier, delta_type_node);
6388 TREE_CHAIN (field) = fields;
6391 finish_builtin_struct (t, "__ptrmemfunc_type", fields, ptr_type_node);
6393 /* Zap out the name so that the back-end will give us the debugging
6394 information for this anonymous RECORD_TYPE. */
6395 TYPE_NAME (t) = NULL_TREE;
6397 /* If this is not the unqualified form of this pointer-to-member
6398 type, set the TYPE_MAIN_VARIANT for this type to be the
6399 unqualified type. Since they are actually RECORD_TYPEs that are
6400 not variants of each other, we must do this manually. */
6401 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
6403 t = build_qualified_type (t, cp_type_quals (type));
6404 TYPE_MAIN_VARIANT (t) = unqualified_variant;
6405 TYPE_NEXT_VARIANT (t) = TYPE_NEXT_VARIANT (unqualified_variant);
6406 TYPE_NEXT_VARIANT (unqualified_variant) = t;
6409 /* Cache this pointer-to-member type so that we can find it again
6411 TYPE_SET_PTRMEMFUNC_TYPE (type, t);
6416 /* Create and return a pointer to data member type. */
6419 build_ptrmem_type (tree class_type, tree member_type)
6421 if (TREE_CODE (member_type) == METHOD_TYPE)
6425 arg_types = TYPE_ARG_TYPES (member_type);
6426 class_type = (cp_build_qualified_type
6428 cp_type_quals (TREE_TYPE (TREE_VALUE (arg_types)))));
6430 = build_method_type_directly (class_type,
6431 TREE_TYPE (member_type),
6432 TREE_CHAIN (arg_types));
6433 return build_ptrmemfunc_type (build_pointer_type (member_type));
6437 gcc_assert (TREE_CODE (member_type) != FUNCTION_TYPE);
6438 return build_offset_type (class_type, member_type);
6442 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
6443 Check to see that the definition is valid. Issue appropriate error
6444 messages. Return 1 if the definition is particularly bad, or 0
6448 check_static_variable_definition (tree decl, tree type)
6450 /* Motion 10 at San Diego: If a static const integral data member is
6451 initialized with an integral constant expression, the initializer
6452 may appear either in the declaration (within the class), or in
6453 the definition, but not both. If it appears in the class, the
6454 member is a member constant. The file-scope definition is always
6456 if (!ARITHMETIC_TYPE_P (type) && TREE_CODE (type) != ENUMERAL_TYPE)
6458 error ("invalid in-class initialization of static data member "
6459 "of non-integral type %qT",
6461 /* If we just return the declaration, crashes will sometimes
6462 occur. We therefore return void_type_node, as if this were a
6463 friend declaration, to cause callers to completely ignore
6464 this declaration. */
6467 else if (!CP_TYPE_CONST_P (type))
6468 error ("ISO C++ forbids in-class initialization of non-const "
6469 "static member %qD",
6471 else if (pedantic && !INTEGRAL_TYPE_P (type))
6472 pedwarn ("ISO C++ forbids initialization of member constant "
6473 "%qD of non-integral type %qT", decl, type);
6478 /* Given the SIZE (i.e., number of elements) in an array, compute an
6479 appropriate index type for the array. If non-NULL, NAME is the
6480 name of the thing being declared. */
6483 compute_array_index_type (tree name, tree size)
6488 if (error_operand_p (size))
6489 return error_mark_node;
6491 type = TREE_TYPE (size);
6492 /* The array bound must be an integer type. */
6493 if (!dependent_type_p (type) && !INTEGRAL_TYPE_P (type))
6496 error ("size of array %qD has non-integral type %qT", name, type);
6498 error ("size of array has non-integral type %qT", type);
6499 size = integer_one_node;
6500 type = TREE_TYPE (size);
6503 if (abi_version_at_least (2)
6504 /* We should only handle value dependent expressions specially. */
6505 ? value_dependent_expression_p (size)
6506 /* But for abi-1, we handled all instances in templates. This
6507 effects the manglings produced. */
6508 : processing_template_decl)
6509 return build_index_type (build_min (MINUS_EXPR, sizetype,
6510 size, integer_one_node));
6512 /* The size might be the result of a cast. */
6513 STRIP_TYPE_NOPS (size);
6515 /* It might be a const variable or enumeration constant. */
6516 size = integral_constant_value (size);
6518 /* Normally, the array-bound will be a constant. */
6519 if (TREE_CODE (size) == INTEGER_CST)
6521 /* Check to see if the array bound overflowed. Make that an
6522 error, no matter how generous we're being. */
6523 int old_flag_pedantic_errors = flag_pedantic_errors;
6524 int old_pedantic = pedantic;
6525 pedantic = flag_pedantic_errors = 1;
6526 constant_expression_warning (size);
6527 pedantic = old_pedantic;
6528 flag_pedantic_errors = old_flag_pedantic_errors;
6530 /* An array must have a positive number of elements. */
6531 if (INT_CST_LT (size, integer_zero_node))
6534 error ("size of array %qD is negative", name);
6536 error ("size of array is negative");
6537 size = integer_one_node;
6539 /* As an extension we allow zero-sized arrays. We always allow
6540 them in system headers because glibc uses them. */
6541 else if (integer_zerop (size) && pedantic && !in_system_header)
6544 pedwarn ("ISO C++ forbids zero-size array %qD", name);
6546 pedwarn ("ISO C++ forbids zero-size array");
6549 else if (TREE_CONSTANT (size))
6551 /* `(int) &fn' is not a valid array bound. */
6553 error ("size of array %qD is not an integral constant-expression",
6556 error ("size of array is not an integral constant-expression");
6557 size = integer_one_node;
6562 pedwarn ("ISO C++ forbids variable-size array %qD", name);
6564 pedwarn ("ISO C++ forbids variable-size array");
6567 if (processing_template_decl && !TREE_CONSTANT (size))
6568 /* A variable sized array. */
6569 itype = build_min (MINUS_EXPR, sizetype, size, integer_one_node);
6572 HOST_WIDE_INT saved_processing_template_decl;
6574 /* Compute the index of the largest element in the array. It is
6575 one less than the number of elements in the array. We save
6576 and restore PROCESSING_TEMPLATE_DECL so that computations in
6577 cp_build_binary_op will be appropriately folded. */
6578 saved_processing_template_decl = processing_template_decl;
6579 processing_template_decl = 0;
6580 itype = cp_build_binary_op (MINUS_EXPR,
6581 cp_convert (ssizetype, size),
6582 cp_convert (ssizetype, integer_one_node));
6583 itype = fold (itype);
6584 processing_template_decl = saved_processing_template_decl;
6586 if (!TREE_CONSTANT (itype))
6587 /* A variable sized array. */
6588 itype = variable_size (itype);
6589 /* Make sure that there was no overflow when creating to a signed
6590 index type. (For example, on a 32-bit machine, an array with
6591 size 2^32 - 1 is too big.) */
6592 else if (TREE_CODE (itype) == INTEGER_CST
6593 && TREE_OVERFLOW (itype))
6595 error ("overflow in array dimension");
6596 TREE_OVERFLOW (itype) = 0;
6600 /* Create and return the appropriate index type. */
6601 return build_index_type (itype);
6604 /* Returns the scope (if any) in which the entity declared by
6605 DECLARATOR will be located. If the entity was declared with an
6606 unqualified name, NULL_TREE is returned. */
6609 get_scope_of_declarator (const cp_declarator *declarator)
6611 while (declarator && declarator->kind != cdk_id)
6612 declarator = declarator->declarator;
6614 /* If the declarator-id is a SCOPE_REF, the scope in which the
6615 declaration occurs is the first operand. */
6617 && declarator->u.id.qualifying_scope)
6618 return declarator->u.id.qualifying_scope;
6620 /* Otherwise, the declarator is not a qualified name; the entity will
6621 be declared in the current scope. */
6625 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
6626 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
6630 create_array_type_for_decl (tree name, tree type, tree size)
6632 tree itype = NULL_TREE;
6633 const char* error_msg;
6635 /* If things have already gone awry, bail now. */
6636 if (type == error_mark_node || size == error_mark_node)
6637 return error_mark_node;
6639 /* Assume that everything will go OK. */
6642 /* There are some types which cannot be array elements. */
6643 switch (TREE_CODE (type))
6646 error_msg = "array of void";
6650 error_msg = "array of functions";
6653 case REFERENCE_TYPE:
6654 error_msg = "array of references";
6658 error_msg = "array of function members";
6665 /* If something went wrong, issue an error-message and return. */
6669 error ("declaration of %qD as %s", name, error_msg);
6671 error ("creating %s", error_msg);
6673 return error_mark_node;
6678 The constant expressions that specify the bounds of the arrays
6679 can be omitted only for the first member of the sequence. */
6680 if (TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type))
6683 error ("declaration of %qD as multidimensional array must "
6684 "have bounds for all dimensions except the first",
6687 error ("multidimensional array must have bounds for all "
6688 "dimensions except the first");
6690 return error_mark_node;
6693 /* Figure out the index type for the array. */
6695 itype = compute_array_index_type (name, size);
6698 T is called the array element type; this type shall not be [...] an
6699 abstract class type. */
6700 abstract_virtuals_error (name, type);
6702 return build_cplus_array_type (type, itype);
6705 /* Check that it's OK to declare a function with the indicated TYPE.
6706 SFK indicates the kind of special function (if any) that this
6707 function is. OPTYPE is the type given in a conversion operator
6708 declaration, or the class type for a constructor/destructor.
6709 Returns the actual return type of the function; that
6710 may be different than TYPE if an error occurs, or for certain
6711 special functions. */
6714 check_special_function_return_type (special_function_kind sfk,
6720 case sfk_constructor:
6722 error ("return type specification for constructor invalid");
6724 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
6725 type = build_pointer_type (optype);
6727 type = void_type_node;
6730 case sfk_destructor:
6732 error ("return type specification for destructor invalid");
6733 /* We can't use the proper return type here because we run into
6734 problems with ambiguous bases and covariant returns.
6735 Java classes are left unchanged because (void *) isn't a valid
6736 Java type, and we don't want to change the Java ABI. */
6737 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
6738 type = build_pointer_type (void_type_node);
6740 type = void_type_node;
6743 case sfk_conversion:
6744 if (type && !same_type_p (type, optype))
6745 error ("operator %qT declared to return %qT", optype, type);
6747 pedwarn ("return type specified for %<operator %T%>", optype);
6758 /* A variable or data member (whose unqualified name is IDENTIFIER)
6759 has been declared with the indicated TYPE. If the TYPE is not
6760 acceptable, issue an error message and return a type to use for
6761 error-recovery purposes. */
6764 check_var_type (tree identifier, tree type)
6766 if (VOID_TYPE_P (type))
6769 error ("unnamed variable or field declared void");
6770 else if (TREE_CODE (identifier) == IDENTIFIER_NODE)
6772 gcc_assert (!IDENTIFIER_OPNAME_P (identifier));
6773 error ("variable or field %qE declared void", identifier);
6776 error ("variable or field declared void");
6777 type = error_mark_node;
6783 /* Given declspecs and a declarator (abstract or otherwise), determine
6784 the name and type of the object declared and construct a DECL node
6787 DECLSPECS is a chain of tree_list nodes whose value fields
6788 are the storage classes and type specifiers.
6790 DECL_CONTEXT says which syntactic context this declaration is in:
6791 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
6792 FUNCDEF for a function definition. Like NORMAL but a few different
6793 error messages in each case. Return value may be zero meaning
6794 this definition is too screwy to try to parse.
6795 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
6796 handle member functions (which have FIELD context).
6797 Return value may be zero meaning this definition is too screwy to
6799 PARM for a parameter declaration (either within a function prototype
6800 or before a function body). Make a PARM_DECL, or return void_type_node.
6801 CATCHPARM for a parameter declaration before a catch clause.
6802 TYPENAME if for a typename (in a cast or sizeof).
6803 Don't make a DECL node; just return the ..._TYPE node.
6804 FIELD for a struct or union field; make a FIELD_DECL.
6805 BITFIELD for a field with specified width.
6806 INITIALIZED is 1 if the decl has an initializer.
6808 ATTRLIST is a pointer to the list of attributes, which may be NULL
6809 if there are none; *ATTRLIST may be modified if attributes from inside
6810 the declarator should be applied to the declaration.
6812 When this function is called, scoping variables (such as
6813 CURRENT_CLASS_TYPE) should reflect the scope in which the
6814 declaration occurs, not the scope in which the new declaration will
6815 be placed. For example, on:
6819 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
6822 Returns a DECL (if a declarator is present), a TYPE (if there is no
6823 declarator, in cases like "struct S;"), or the ERROR_MARK_NODE if an
6827 grokdeclarator (const cp_declarator *declarator,
6828 const cp_decl_specifier_seq *declspecs,
6829 enum decl_context decl_context,
6833 tree type = NULL_TREE;
6835 int virtualp, explicitp, friendp, inlinep, staticp;
6836 int explicit_int = 0;
6837 int explicit_char = 0;
6838 int defaulted_int = 0;
6839 tree dependent_name = NULL_TREE;
6841 tree typedef_decl = NULL_TREE;
6842 const char *name = NULL;
6843 tree typedef_type = NULL_TREE;
6844 /* True if this declarator is a function definition. */
6845 bool funcdef_flag = false;
6846 cp_declarator_kind innermost_code = cdk_error;
6849 /* See the code below that used this. */
6850 tree decl_attr = NULL_TREE;
6853 /* Keep track of what sort of function is being processed
6854 so that we can warn about default return values, or explicit
6855 return values which do not match prescribed defaults. */
6856 special_function_kind sfk = sfk_none;
6858 tree dname = NULL_TREE;
6859 tree ctor_return_type = NULL_TREE;
6860 enum overload_flags flags = NO_SPECIAL;
6861 /* cv-qualifiers that apply to the declarator, for a declaration of
6862 a member function. */
6863 cp_cv_quals memfn_quals = TYPE_UNQUALIFIED;
6864 /* cv-qualifiers that apply to the type specified by the DECLSPECS. */
6866 tree raises = NULL_TREE;
6867 int template_count = 0;
6868 tree returned_attrs = NULL_TREE;
6869 tree parms = NULL_TREE;
6870 const cp_declarator *id_declarator;
6871 /* The unqualified name of the declarator; either an
6872 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
6873 tree unqualified_id;
6874 /* The class type, if any, in which this entity is located,
6875 or NULL_TREE if none. Note that this value may be different from
6876 the current class type; for example if an attempt is made to declare
6877 "A::f" inside "B", this value will be "A". */
6878 tree ctype = current_class_type;
6879 /* The NAMESPACE_DECL for the namespace in which this entity is
6880 located. If an unqualified name is used to declare the entity,
6881 this value will be NULL_TREE, even if the entity is located at
6883 tree in_namespace = NULL_TREE;
6884 cp_storage_class storage_class;
6885 bool unsigned_p, signed_p, short_p, long_p, thread_p;
6886 bool type_was_error_mark_node = false;
6888 signed_p = declspecs->specs[(int)ds_signed];
6889 unsigned_p = declspecs->specs[(int)ds_unsigned];
6890 short_p = declspecs->specs[(int)ds_short];
6891 long_p = declspecs->specs[(int)ds_long];
6892 longlong = declspecs->specs[(int)ds_long] >= 2;
6893 thread_p = declspecs->specs[(int)ds_thread];
6895 if (decl_context == FUNCDEF)
6896 funcdef_flag = true, decl_context = NORMAL;
6897 else if (decl_context == MEMFUNCDEF)
6898 funcdef_flag = true, decl_context = FIELD;
6899 else if (decl_context == BITFIELD)
6900 bitfield = 1, decl_context = FIELD;
6902 /* Look inside a declarator for the name being declared
6903 and get it as a string, for an error message. */
6904 for (id_declarator = declarator;
6906 id_declarator = id_declarator->declarator)
6908 if (id_declarator->kind != cdk_id)
6909 innermost_code = id_declarator->kind;
6911 switch (id_declarator->kind)
6914 if (id_declarator->declarator
6915 && id_declarator->declarator->kind == cdk_id)
6917 sfk = id_declarator->declarator->u.id.sfk;
6918 if (sfk == sfk_destructor)
6925 tree qualifying_scope = id_declarator->u.id.qualifying_scope;
6926 tree decl = id_declarator->u.id.unqualified_name;
6929 if (qualifying_scope)
6931 if (at_function_scope_p ())
6935 A declarator-id shall not be qualified except
6938 None of the cases are permitted in block
6940 if (qualifying_scope == global_namespace)
6941 error ("invalid use of qualified-name %<::%D%>",
6943 else if (TYPE_P (qualifying_scope))
6944 error ("invalid use of qualified-name %<%T::%D%>",
6945 qualifying_scope, decl);
6947 error ("invalid use of qualified-name %<%D::%D%>",
6948 qualifying_scope, decl);
6949 return error_mark_node;
6951 else if (TYPE_P (qualifying_scope))
6953 ctype = qualifying_scope;
6954 if (innermost_code != cdk_function
6955 && current_class_type
6956 && !UNIQUELY_DERIVED_FROM_P (ctype,
6957 current_class_type))
6959 error ("type %qT is not derived from type %qT",
6960 ctype, current_class_type);
6961 return error_mark_node;
6964 else if (TREE_CODE (qualifying_scope) == NAMESPACE_DECL)
6965 in_namespace = qualifying_scope;
6967 switch (TREE_CODE (decl))
6973 if (innermost_code != cdk_function)
6975 error ("declaration of %qD as non-function", decl);
6976 return error_mark_node;
6978 else if (!qualifying_scope
6979 && !(current_class_type && at_class_scope_p ()))
6981 error ("declaration of %qD as non-member", decl);
6982 return error_mark_node;
6985 type = TREE_OPERAND (decl, 0);
6986 name = IDENTIFIER_POINTER (constructor_name (type));
6991 case TEMPLATE_ID_EXPR:
6993 tree fns = TREE_OPERAND (decl, 0);
6996 if (TREE_CODE (dname) != IDENTIFIER_NODE)
6998 gcc_assert (is_overloaded_fn (dname));
6999 dname = DECL_NAME (get_first_fn (dname));
7004 case IDENTIFIER_NODE:
7005 if (TREE_CODE (decl) == IDENTIFIER_NODE)
7008 if (C_IS_RESERVED_WORD (dname))
7010 error ("declarator-id missing; using reserved word %qD",
7012 name = IDENTIFIER_POINTER (dname);
7014 else if (!IDENTIFIER_TYPENAME_P (dname))
7015 name = IDENTIFIER_POINTER (dname);
7018 gcc_assert (flags == NO_SPECIAL);
7019 flags = TYPENAME_FLAG;
7020 ctor_return_type = TREE_TYPE (dname);
7021 sfk = sfk_conversion;
7022 if (is_typename_at_global_scope (dname))
7023 name = IDENTIFIER_POINTER (dname);
7025 name = "<invalid operator>";
7041 return error_mark_node;
7047 if (id_declarator->kind == cdk_id)
7053 The declarator in a function-definition shall have the form
7054 D1 ( parameter-declaration-clause) ... */
7055 if (funcdef_flag && innermost_code != cdk_function)
7057 error ("function definition does not declare parameters");
7058 return error_mark_node;
7061 if (((dname && IDENTIFIER_OPNAME_P (dname)) || flags == TYPENAME_FLAG)
7062 && innermost_code != cdk_function
7063 && ! (ctype && !declspecs->any_specifiers_p))
7065 error ("declaration of %qD as non-function", dname);
7066 return error_mark_node;
7069 /* Anything declared one level down from the top level
7070 must be one of the parameters of a function
7071 (because the body is at least two levels down). */
7073 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
7074 by not allowing C++ class definitions to specify their parameters
7075 with xdecls (must be spec.d in the parmlist).
7077 Since we now wait to push a class scope until we are sure that
7078 we are in a legitimate method context, we must set oldcname
7079 explicitly (since current_class_name is not yet alive).
7081 We also want to avoid calling this a PARM if it is in a namespace. */
7083 if (decl_context == NORMAL && !toplevel_bindings_p ())
7085 struct cp_binding_level *b = current_binding_level;
7086 current_binding_level = b->level_chain;
7087 if (current_binding_level != 0 && toplevel_bindings_p ())
7088 decl_context = PARM;
7089 current_binding_level = b;
7093 name = decl_context == PARM ? "parameter" : "type name";
7095 /* If there were multiple types specified in the decl-specifier-seq,
7096 issue an error message. */
7097 if (declspecs->multiple_types_p)
7099 error ("two or more data types in declaration of %qs", name);
7100 return error_mark_node;
7103 /* Extract the basic type from the decl-specifier-seq. */
7104 type = declspecs->type;
7105 if (type == error_mark_node)
7108 type_was_error_mark_node = true;
7110 /* If the entire declaration is itself tagged as deprecated then
7111 suppress reports of deprecated items. */
7112 if (type && TREE_DEPRECATED (type)
7113 && deprecated_state != DEPRECATED_SUPPRESS)
7114 warn_deprecated_use (type);
7115 if (type && TREE_CODE (type) == TYPE_DECL)
7117 typedef_decl = type;
7118 type = TREE_TYPE (typedef_decl);
7120 /* No type at all: default to `int', and set DEFAULTED_INT
7121 because it was not a user-defined typedef. */
7122 if (type == NULL_TREE && (signed_p || unsigned_p || long_p || short_p))
7124 /* These imply 'int'. */
7125 type = integer_type_node;
7129 explicit_int = declspecs->explicit_int_p;
7130 explicit_char = declspecs->explicit_char_p;
7133 /* See the code below that used this. */
7135 decl_attr = DECL_ATTRIBUTES (typedef_decl);
7137 typedef_type = type;
7140 if (sfk != sfk_conversion)
7141 ctor_return_type = ctype;
7143 if (sfk != sfk_none)
7144 type = check_special_function_return_type (sfk, type,
7146 else if (type == NULL_TREE)
7152 /* We handle `main' specially here, because 'main () { }' is so
7153 common. With no options, it is allowed. With -Wreturn-type,
7154 it is a warning. It is only an error with -pedantic-errors. */
7155 is_main = (funcdef_flag
7156 && dname && MAIN_NAME_P (dname)
7157 && ctype == NULL_TREE
7158 && in_namespace == NULL_TREE
7159 && current_namespace == global_namespace);
7161 if (type_was_error_mark_node)
7162 /* We've already issued an error, don't complain more. */;
7163 else if (in_system_header || flag_ms_extensions)
7164 /* Allow it, sigh. */;
7165 else if (pedantic || ! is_main)
7166 pedwarn ("ISO C++ forbids declaration of %qs with no type", name);
7167 else if (warn_return_type)
7168 warning (0, "ISO C++ forbids declaration of %qs with no type", name);
7170 type = integer_type_node;
7175 /* Now process the modifiers that were specified
7176 and check for invalid combinations. */
7178 /* Long double is a special combination. */
7179 if (long_p && !longlong && TYPE_MAIN_VARIANT (type) == double_type_node)
7182 type = build_qualified_type (long_double_type_node,
7183 cp_type_quals (type));
7186 /* Check all other uses of type modifiers. */
7188 if (unsigned_p || signed_p || long_p || short_p)
7192 if ((signed_p || unsigned_p) && TREE_CODE (type) != INTEGER_TYPE)
7193 error ("%<signed%> or %<unsigned%> invalid for %qs", name);
7194 else if (signed_p && unsigned_p)
7195 error ("%<signed%> and %<unsigned%> specified together for %qs", name);
7196 else if (longlong && TREE_CODE (type) != INTEGER_TYPE)
7197 error ("%<long long%> invalid for %qs", name);
7198 else if (long_p && TREE_CODE (type) == REAL_TYPE)
7199 error ("%<long%> invalid for %qs", name);
7200 else if (short_p && TREE_CODE (type) == REAL_TYPE)
7201 error ("%<short%> invalid for %qs", name);
7202 else if ((long_p || short_p) && TREE_CODE (type) != INTEGER_TYPE)
7203 error ("%<long%> or %<short%> invalid for %qs", name);
7204 else if ((long_p || short_p) && explicit_char)
7205 error ("%<long%> or %<short%> specified with char for %qs", name);
7206 else if (long_p && short_p)
7207 error ("%<long%> and %<short%> specified together for %qs", name);
7211 if (!explicit_int && !defaulted_int && !explicit_char && pedantic)
7213 pedwarn ("long, short, signed or unsigned used invalidly for %qs",
7215 if (flag_pedantic_errors)
7220 /* Discard the type modifiers if they are invalid. */
7231 /* Decide whether an integer type is signed or not.
7232 Optionally treat bitfields as signed by default. */
7236 It is implementation-defined whether a plain (neither
7237 explicitly signed or unsigned) char, short, int, or long
7238 bit-field is signed or unsigned.
7240 Naturally, we extend this to long long as well. Note that
7241 this does not include wchar_t. */
7242 || (bitfield && !flag_signed_bitfields
7244 /* A typedef for plain `int' without `signed' can be
7245 controlled just like plain `int', but a typedef for
7246 `signed int' cannot be so controlled. */
7248 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl))
7249 && TREE_CODE (type) == INTEGER_TYPE
7250 && !same_type_p (TYPE_MAIN_VARIANT (type), wchar_type_node)))
7253 type = long_long_unsigned_type_node;
7255 type = long_unsigned_type_node;
7257 type = short_unsigned_type_node;
7258 else if (type == char_type_node)
7259 type = unsigned_char_type_node;
7260 else if (typedef_decl)
7261 type = c_common_unsigned_type (type);
7263 type = unsigned_type_node;
7265 else if (signed_p && type == char_type_node)
7266 type = signed_char_type_node;
7268 type = long_long_integer_type_node;
7270 type = long_integer_type_node;
7272 type = short_integer_type_node;
7274 if (declspecs->specs[(int)ds_complex])
7276 if (TREE_CODE (type) != INTEGER_TYPE && TREE_CODE (type) != REAL_TYPE)
7277 error ("complex invalid for %qs", name);
7278 /* If we just have "complex", it is equivalent to
7279 "complex double", but if any modifiers at all are specified it is
7280 the complex form of TYPE. E.g, "complex short" is
7281 "complex short int". */
7283 else if (defaulted_int && ! longlong
7284 && ! (long_p || short_p || signed_p || unsigned_p))
7285 type = complex_double_type_node;
7286 else if (type == integer_type_node)
7287 type = complex_integer_type_node;
7288 else if (type == float_type_node)
7289 type = complex_float_type_node;
7290 else if (type == double_type_node)
7291 type = complex_double_type_node;
7292 else if (type == long_double_type_node)
7293 type = complex_long_double_type_node;
7295 type = build_complex_type (type);
7298 type_quals = TYPE_UNQUALIFIED;
7299 if (declspecs->specs[(int)ds_const])
7300 type_quals |= TYPE_QUAL_CONST;
7301 if (declspecs->specs[(int)ds_volatile])
7302 type_quals |= TYPE_QUAL_VOLATILE;
7303 if (declspecs->specs[(int)ds_restrict])
7304 type_quals |= TYPE_QUAL_RESTRICT;
7305 if (sfk == sfk_conversion && type_quals != TYPE_UNQUALIFIED)
7306 error ("qualifiers are not allowed on declaration of %<operator %T%>",
7309 if (TREE_CODE (type) == FUNCTION_TYPE
7310 && type_quals != TYPE_UNQUALIFIED)
7312 /* This was an error in C++98 (cv-qualifiers cannot be added to
7313 a function type), but DR 295 makes the code well-formed by
7314 dropping the extra qualifiers. */
7317 tree bad_type = build_qualified_type (type, type_quals);
7318 pedwarn ("ignoring %qV qualifiers added to function type %qT",
7321 type_quals = TYPE_UNQUALIFIED;
7323 type_quals |= cp_type_quals (type);
7324 type = cp_build_qualified_type_real
7325 (type, type_quals, ((typedef_decl && !DECL_ARTIFICIAL (typedef_decl)
7326 ? tf_ignore_bad_quals : 0) | tf_warning_or_error));
7327 /* We might have ignored or rejected some of the qualifiers. */
7328 type_quals = cp_type_quals (type);
7331 inlinep = !! declspecs->specs[(int)ds_inline];
7332 virtualp = !! declspecs->specs[(int)ds_virtual];
7333 explicitp = !! declspecs->specs[(int)ds_explicit];
7335 storage_class = declspecs->storage_class;
7336 if (storage_class == sc_static)
7337 staticp = 1 + (decl_context == FIELD);
7339 if (virtualp && staticp == 2)
7341 error ("member %qD cannot be declared both virtual and static", dname);
7342 storage_class = sc_none;
7345 friendp = !! declspecs->specs[(int)ds_friend];
7347 if (dependent_name && !friendp)
7349 error ("%<%T::%D%> is not a valid declarator", ctype, dependent_name);
7350 return error_mark_node;
7353 /* Issue errors about use of storage classes for parameters. */
7354 if (decl_context == PARM)
7356 if (declspecs->specs[(int)ds_typedef])
7358 error ("typedef declaration invalid in parameter declaration");
7359 return error_mark_node;
7361 else if (storage_class == sc_static
7362 || storage_class == sc_extern
7364 error ("storage class specifiers invalid in parameter declarations");
7367 /* Give error if `virtual' is used outside of class declaration. */
7369 && (current_class_name == NULL_TREE || decl_context != FIELD))
7371 error ("virtual outside class declaration");
7375 /* Static anonymous unions are dealt with here. */
7376 if (staticp && decl_context == TYPENAME
7378 && ANON_AGGR_TYPE_P (declspecs->type))
7379 decl_context = FIELD;
7381 /* Warn about storage classes that are invalid for certain
7382 kinds of declarations (parameters, typenames, etc.). */
7383 if (declspecs->conflicting_specifiers_p)
7385 error ("conflicting specifiers in declaration of %qs", name);
7386 storage_class = sc_none;
7390 && storage_class != sc_extern
7391 && storage_class != sc_static)
7392 || declspecs->specs[(int)ds_typedef]))
7394 error ("multiple storage classes in declaration of %qs", name);
7397 else if (decl_context != NORMAL
7398 && ((storage_class != sc_none
7399 && storage_class != sc_mutable)
7402 if ((decl_context == PARM || decl_context == CATCHPARM)
7403 && (storage_class == sc_register
7404 || storage_class == sc_auto))
7406 else if (declspecs->specs[(int)ds_typedef])
7408 else if (decl_context == FIELD
7409 /* C++ allows static class elements. */
7410 && storage_class == sc_static)
7411 /* C++ also allows inlines and signed and unsigned elements,
7412 but in those cases we don't come in here. */
7416 if (decl_context == FIELD)
7417 error ("storage class specified for %qs", name);
7420 if (decl_context == PARM || decl_context == CATCHPARM)
7421 error ("storage class specified for parameter %qs", name);
7423 error ("storage class specified for typename");
7425 if (storage_class == sc_register
7426 || storage_class == sc_auto
7427 || storage_class == sc_extern
7429 storage_class = sc_none;
7432 else if (storage_class == sc_extern && initialized
7435 if (toplevel_bindings_p ())
7437 /* It's common practice (and completely valid) to have a const
7438 be initialized and declared extern. */
7439 if (!(type_quals & TYPE_QUAL_CONST))
7440 warning (0, "%qs initialized and declared %<extern%>", name);
7443 error ("%qs has both %<extern%> and initializer", name);
7445 else if (storage_class == sc_extern && funcdef_flag
7446 && ! toplevel_bindings_p ())
7447 error ("nested function %qs declared %<extern%>", name);
7448 else if (toplevel_bindings_p ())
7450 if (storage_class == sc_auto)
7451 error ("top-level declaration of %qs specifies %<auto%>", name);
7454 && storage_class != sc_extern
7455 && storage_class != sc_static)
7457 error ("function-scope %qs implicitly auto and declared %<__thread%>",
7462 if (storage_class && friendp)
7463 error ("storage class specifiers invalid in friend function declarations");
7466 unqualified_id = NULL_TREE;
7469 unqualified_id = id_declarator->u.id.unqualified_name;
7470 switch (TREE_CODE (unqualified_id))
7474 = constructor_name (TREE_OPERAND (unqualified_id, 0));
7477 case IDENTIFIER_NODE:
7478 case TEMPLATE_ID_EXPR:
7486 /* Determine the type of the entity declared by recurring on the
7488 for (; declarator; declarator = declarator->declarator)
7490 const cp_declarator *inner_declarator;
7493 if (type == error_mark_node)
7494 return error_mark_node;
7496 attrs = declarator->attributes;
7502 if (declarator == NULL || declarator->kind == cdk_id)
7503 attr_flags |= (int) ATTR_FLAG_DECL_NEXT;
7504 if (declarator->kind == cdk_function)
7505 attr_flags |= (int) ATTR_FLAG_FUNCTION_NEXT;
7506 if (declarator->kind == cdk_array)
7507 attr_flags |= (int) ATTR_FLAG_ARRAY_NEXT;
7508 returned_attrs = decl_attributes (&type,
7509 chainon (returned_attrs, attrs),
7513 if (declarator->kind == cdk_id)
7516 inner_declarator = declarator->declarator;
7518 switch (declarator->kind)
7521 type = create_array_type_for_decl (dname, type,
7522 declarator->u.array.bounds);
7530 /* Declaring a function type.
7531 Make sure we have a valid type for the function to return. */
7533 /* We now know that the TYPE_QUALS don't apply to the
7534 decl, but to its return type. */
7535 type_quals = TYPE_UNQUALIFIED;
7537 /* Warn about some types functions can't return. */
7539 if (TREE_CODE (type) == FUNCTION_TYPE)
7541 error ("%qs declared as function returning a function", name);
7542 type = integer_type_node;
7544 if (TREE_CODE (type) == ARRAY_TYPE)
7546 error ("%qs declared as function returning an array", name);
7547 type = integer_type_node;
7550 /* Pick up type qualifiers which should be applied to `this'. */
7551 memfn_quals = declarator->u.function.qualifiers;
7553 /* Pick up the exception specifications. */
7554 raises = declarator->u.function.exception_specification;
7556 /* Say it's a definition only for the CALL_EXPR
7557 closest to the identifier. */
7558 funcdecl_p = inner_declarator && inner_declarator->kind == cdk_id;
7560 if (ctype == NULL_TREE
7561 && decl_context == FIELD
7563 && (friendp == 0 || dname == current_class_name))
7564 ctype = current_class_type;
7566 if (ctype && (sfk == sfk_constructor
7567 || sfk == sfk_destructor))
7569 /* We are within a class's scope. If our declarator name
7570 is the same as the class name, and we are defining
7571 a function, then it is a constructor/destructor, and
7572 therefore returns a void type. */
7574 /* ISO C++ 12.4/2. A destructor may not be declared
7575 const or volatile. A destructor may not be
7578 ISO C++ 12.1. A constructor may not be declared
7579 const or volatile. A constructor may not be
7580 virtual. A constructor may not be static. */
7582 error ((flags == DTOR_FLAG)
7583 ? "destructor cannot be static member function"
7584 : "constructor cannot be static member function");
7587 error ((flags == DTOR_FLAG)
7588 ? "destructors may not be cv-qualified"
7589 : "constructors may not be cv-qualified");
7590 memfn_quals = TYPE_UNQUALIFIED;
7593 if (decl_context == FIELD
7594 && !member_function_or_else (ctype,
7597 return error_mark_node;
7599 if (flags != DTOR_FLAG)
7601 /* It's a constructor. */
7606 pedwarn ("constructors cannot be declared virtual");
7609 if (decl_context == FIELD
7610 && sfk != sfk_constructor)
7611 return error_mark_node;
7613 if (decl_context == FIELD)
7619 error ("can't initialize friend function %qs", name);
7622 /* Cannot be both friend and virtual. */
7623 error ("virtual functions cannot be friends");
7626 if (decl_context == NORMAL)
7627 error ("friend declaration not in class definition");
7628 if (current_function_decl && funcdef_flag)
7629 error ("can't define friend function %qs in a local "
7634 arg_types = grokparms (declarator->u.function.parameters,
7637 if (inner_declarator
7638 && inner_declarator->kind == cdk_id
7639 && inner_declarator->u.id.sfk == sfk_destructor
7640 && arg_types != void_list_node)
7642 error ("destructors may not have parameters");
7643 arg_types = void_list_node;
7647 type = build_function_type (type, arg_types);
7654 /* Filter out pointers-to-references and references-to-references.
7655 We can get these if a TYPE_DECL is used. */
7657 if (TREE_CODE (type) == REFERENCE_TYPE)
7659 error (declarator->kind == cdk_reference
7660 ? "cannot declare reference to %q#T"
7661 : "cannot declare pointer to %q#T", type);
7662 type = TREE_TYPE (type);
7664 else if (VOID_TYPE_P (type))
7666 if (declarator->kind == cdk_reference)
7667 error ("cannot declare reference to %q#T", type);
7668 else if (declarator->kind == cdk_ptrmem)
7669 error ("cannot declare pointer to %q#T member", type);
7672 /* We now know that the TYPE_QUALS don't apply to the decl,
7673 but to the target of the pointer. */
7674 type_quals = TYPE_UNQUALIFIED;
7676 if (declarator->kind == cdk_ptrmem
7677 && (TREE_CODE (type) == FUNCTION_TYPE || memfn_quals))
7679 memfn_quals |= cp_type_quals (type);
7680 type = build_memfn_type (type,
7681 declarator->u.pointer.class_type,
7683 memfn_quals = TYPE_UNQUALIFIED;
7686 if (declarator->kind == cdk_reference)
7688 if (!VOID_TYPE_P (type))
7689 type = build_reference_type (type);
7691 else if (TREE_CODE (type) == METHOD_TYPE)
7692 type = build_ptrmemfunc_type (build_pointer_type (type));
7693 else if (declarator->kind == cdk_ptrmem)
7695 gcc_assert (TREE_CODE (declarator->u.pointer.class_type)
7697 if (declarator->u.pointer.class_type == error_mark_node)
7698 /* We will already have complained. */
7699 type = error_mark_node;
7701 type = build_ptrmem_type (declarator->u.pointer.class_type,
7705 type = build_pointer_type (type);
7707 /* Process a list of type modifier keywords (such as
7708 const or volatile) that were given inside the `*' or `&'. */
7710 if (declarator->u.pointer.qualifiers)
7713 = cp_build_qualified_type (type,
7714 declarator->u.pointer.qualifiers);
7715 type_quals = cp_type_quals (type);
7728 if (unqualified_id && TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR
7729 && TREE_CODE (type) != FUNCTION_TYPE
7730 && TREE_CODE (type) != METHOD_TYPE)
7732 error ("template-id %qD used as a declarator",
7734 unqualified_id = dname;
7737 /* If TYPE is a FUNCTION_TYPE, but the function name was explicitly
7738 qualified with a class-name, turn it into a METHOD_TYPE, unless
7739 we know that the function is static. We take advantage of this
7740 opportunity to do other processing that pertains to entities
7741 explicitly declared to be class members. Note that if DECLARATOR
7742 is non-NULL, we know it is a cdk_id declarator; otherwise, we
7743 would not have exited the loop above. */
7745 && declarator->u.id.qualifying_scope
7746 && TYPE_P (declarator->u.id.qualifying_scope))
7750 ctype = declarator->u.id.qualifying_scope;
7751 ctype = TYPE_MAIN_VARIANT (ctype);
7753 while (t != NULL_TREE && CLASS_TYPE_P (t))
7755 /* You're supposed to have one `template <...>' for every
7756 template class, but you don't need one for a full
7757 specialization. For example:
7759 template <class T> struct S{};
7760 template <> struct S<int> { void f(); };
7761 void S<int>::f () {}
7763 is correct; there shouldn't be a `template <>' for the
7764 definition of `S<int>::f'. */
7765 if (CLASSTYPE_TEMPLATE_SPECIALIZATION (t)
7766 && !any_dependent_template_arguments_p (CLASSTYPE_TI_ARGS (t)))
7767 /* T is an explicit (not partial) specialization. All
7768 containing classes must therefore also be explicitly
7771 if ((CLASSTYPE_USE_TEMPLATE (t) || CLASSTYPE_IS_TEMPLATE (t))
7772 && PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (t)))
7773 template_count += 1;
7775 t = TYPE_MAIN_DECL (t);
7776 t = DECL_CONTEXT (t);
7779 if (ctype == current_class_type)
7782 pedwarn ("member functions are implicitly friends of their class");
7784 pedwarn ("extra qualification %<%T::%> on member %qs",
7787 else if (/* If the qualifying type is already complete, then we
7788 can skip the following checks. */
7789 !COMPLETE_TYPE_P (ctype)
7790 && (/* If the function is being defined, then
7791 qualifying type must certainly be complete. */
7793 /* A friend declaration of "T::f" is OK, even if
7794 "T" is a template parameter. But, if this
7795 function is not a friend, the qualifying type
7797 || (!friendp && !CLASS_TYPE_P (ctype))
7798 /* For a declaration, the type need not be
7799 complete, if either it is dependent (since there
7800 is no meaningful definition of complete in that
7801 case) or the qualifying class is currently being
7803 || !(dependent_type_p (ctype)
7804 || currently_open_class (ctype)))
7805 /* Check that the qualifying type is complete. */
7806 && !complete_type_or_else (ctype, NULL_TREE))
7807 return error_mark_node;
7808 else if (TREE_CODE (type) == FUNCTION_TYPE)
7810 tree sname = declarator->u.id.unqualified_name;
7812 if (current_class_type
7813 && (!friendp || funcdef_flag))
7816 ? "cannot define member function %<%T::%s%> within %<%T%>"
7817 : "cannot declare member function %<%T::%s%> within %<%T%>",
7818 ctype, name, current_class_type);
7819 return error_mark_node;
7822 if (TREE_CODE (sname) == IDENTIFIER_NODE
7823 && NEW_DELETE_OPNAME_P (sname))
7824 /* Overloaded operator new and operator delete
7825 are always static functions. */
7828 type = build_memfn_type (type, ctype, memfn_quals);
7830 else if (declspecs->specs[(int)ds_typedef]
7831 && current_class_type)
7833 error ("cannot declare member %<%T::%s%> within %qT",
7834 ctype, name, current_class_type);
7835 return error_mark_node;
7839 /* Now TYPE has the actual type. */
7844 *attrlist = chainon (returned_attrs, *attrlist);
7846 attrlist = &returned_attrs;
7849 /* Did array size calculations overflow? */
7851 if (TREE_CODE (type) == ARRAY_TYPE
7852 && COMPLETE_TYPE_P (type)
7853 && TREE_CODE (TYPE_SIZE_UNIT (type)) == INTEGER_CST
7854 && TREE_OVERFLOW (TYPE_SIZE_UNIT (type)))
7856 error ("size of array %qs is too large", name);
7857 /* If we proceed with the array type as it is, we'll eventually
7858 crash in tree_low_cst(). */
7859 type = error_mark_node;
7862 if ((decl_context == FIELD || decl_context == PARM)
7863 && !processing_template_decl
7864 && variably_modified_type_p (type, NULL_TREE))
7866 if (decl_context == FIELD)
7867 error ("data member may not have variably modified type %qT", type);
7869 error ("parameter may not have variably modified type %qT", type);
7870 type = error_mark_node;
7873 if (explicitp == 1 || (explicitp && friendp))
7875 /* [dcl.fct.spec] The explicit specifier shall only be used in
7876 declarations of constructors within a class definition. */
7877 error ("only declarations of constructors can be %<explicit%>");
7881 if (storage_class == sc_mutable)
7883 if (decl_context != FIELD || friendp)
7885 error ("non-member %qs cannot be declared %<mutable%>", name);
7886 storage_class = sc_none;
7888 else if (decl_context == TYPENAME || declspecs->specs[(int)ds_typedef])
7890 error ("non-object member %qs cannot be declared %<mutable%>", name);
7891 storage_class = sc_none;
7893 else if (TREE_CODE (type) == FUNCTION_TYPE
7894 || TREE_CODE (type) == METHOD_TYPE)
7896 error ("function %qs cannot be declared %<mutable%>", name);
7897 storage_class = sc_none;
7901 error ("static %qs cannot be declared %<mutable%>", name);
7902 storage_class = sc_none;
7904 else if (type_quals & TYPE_QUAL_CONST)
7906 error ("const %qs cannot be declared %<mutable%>", name);
7907 storage_class = sc_none;
7911 /* If this is declaring a typedef name, return a TYPE_DECL. */
7912 if (declspecs->specs[(int)ds_typedef] && decl_context != TYPENAME)
7916 /* Note that the grammar rejects storage classes
7917 in typenames, fields or parameters. */
7918 if (current_lang_name == lang_name_java)
7919 TYPE_FOR_JAVA (type) = 1;
7921 /* This declaration:
7923 typedef void f(int) const;
7925 declares a function type which is not a member of any
7926 particular class, but which is cv-qualified; for
7927 example "f S::*" declares a pointer to a const-qualified
7928 member function of S. We record the cv-qualification in the
7930 if (memfn_quals && TREE_CODE (type) == FUNCTION_TYPE)
7931 type = cp_build_qualified_type (type, memfn_quals);
7933 if (decl_context == FIELD)
7934 decl = build_lang_decl (TYPE_DECL, unqualified_id, type);
7936 decl = build_decl (TYPE_DECL, unqualified_id, type);
7937 if (id_declarator && declarator->u.id.qualifying_scope)
7938 error ("%Jtypedef name may not be a nested-name-specifier", decl);
7940 if (decl_context != FIELD)
7942 if (!current_function_decl)
7943 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
7944 else if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (current_function_decl)
7945 || (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P
7946 (current_function_decl)))
7947 /* The TYPE_DECL is "abstract" because there will be
7948 clones of this constructor/destructor, and there will
7949 be copies of this TYPE_DECL generated in those
7951 DECL_ABSTRACT (decl) = 1;
7953 else if (constructor_name_p (unqualified_id, current_class_type))
7954 pedwarn ("ISO C++ forbids nested type %qD with same name "
7955 "as enclosing class",
7958 /* If the user declares "typedef struct {...} foo" then the
7959 struct will have an anonymous name. Fill that name in now.
7960 Nothing can refer to it, so nothing needs know about the name
7962 if (type != error_mark_node
7965 && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
7966 && TYPE_ANONYMOUS_P (type)
7967 /* Don't do this if there are attributes. */
7968 && (!attrlist || !*attrlist)
7969 && cp_type_quals (type) == TYPE_UNQUALIFIED)
7971 tree oldname = TYPE_NAME (type);
7974 /* Replace the anonymous name with the real name everywhere. */
7975 for (t = TYPE_MAIN_VARIANT (type); t; t = TYPE_NEXT_VARIANT (t))
7976 if (TYPE_NAME (t) == oldname)
7977 TYPE_NAME (t) = decl;
7979 if (TYPE_LANG_SPECIFIC (type))
7980 TYPE_WAS_ANONYMOUS (type) = 1;
7982 /* If this is a typedef within a template class, the nested
7983 type is a (non-primary) template. The name for the
7984 template needs updating as well. */
7985 if (TYPE_LANG_SPECIFIC (type) && CLASSTYPE_TEMPLATE_INFO (type))
7986 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type))
7987 = TYPE_IDENTIFIER (type);
7989 /* FIXME remangle member functions; member functions of a
7990 type with external linkage have external linkage. */
7993 /* Any qualifiers on a function type typedef have already been
7995 if (memfn_quals && !ctype && TREE_CODE (type) == FUNCTION_TYPE)
7996 memfn_quals = TYPE_UNQUALIFIED;
7999 || (typedef_decl && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl)))
8000 C_TYPEDEF_EXPLICITLY_SIGNED (decl) = 1;
8002 bad_specifiers (decl, "type", virtualp,
8003 memfn_quals != TYPE_UNQUALIFIED,
8004 inlinep, friendp, raises != NULL_TREE);
8009 /* Detect the case of an array type of unspecified size
8010 which came, as such, direct from a typedef name.
8011 We must copy the type, so that the array's domain can be
8012 individually set by the object's initializer. */
8014 if (type && typedef_type
8015 && TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type)
8016 && TYPE_MAIN_VARIANT (type) == TYPE_MAIN_VARIANT (typedef_type))
8017 type = build_cplus_array_type (TREE_TYPE (type), NULL_TREE);
8019 /* Detect where we're using a typedef of function type to declare a
8020 function. PARMS will not be set, so we must create it now. */
8022 if (type == typedef_type && TREE_CODE (type) == FUNCTION_TYPE)
8024 tree decls = NULL_TREE;
8027 for (args = TYPE_ARG_TYPES (type); args; args = TREE_CHAIN (args))
8029 tree decl = cp_build_parm_decl (NULL_TREE, TREE_VALUE (args));
8031 TREE_CHAIN (decl) = decls;
8035 parms = nreverse (decls);
8037 if (decl_context != TYPENAME)
8039 /* A cv-qualifier-seq shall only be part of the function type
8040 for a non-static member function. [8.3.5/4 dcl.fct] */
8041 if (cp_type_quals (type) != TYPE_UNQUALIFIED
8042 && (current_class_type == NULL_TREE || staticp) )
8045 ? G_("qualified function types cannot be used to "
8046 "declare static member functions")
8047 : G_("qualified function types cannot be used to "
8048 "declare free functions"));
8049 type = TYPE_MAIN_VARIANT (type);
8052 /* The qualifiers on the function type become the qualifiers on
8053 the non-static member function. */
8054 memfn_quals |= cp_type_quals (type);
8058 /* If this is a type name (such as, in a cast or sizeof),
8059 compute the type and return it now. */
8061 if (decl_context == TYPENAME)
8063 /* Note that the grammar rejects storage classes
8064 in typenames, fields or parameters. */
8065 if (type_quals != TYPE_UNQUALIFIED)
8066 type_quals = TYPE_UNQUALIFIED;
8068 /* Special case: "friend class foo" looks like a TYPENAME context. */
8071 if (type_quals != TYPE_UNQUALIFIED)
8073 error ("type qualifiers specified for friend class declaration");
8074 type_quals = TYPE_UNQUALIFIED;
8078 error ("%<inline%> specified for friend class declaration");
8084 /* Don't allow friend declaration without a class-key. */
8085 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
8086 pedwarn ("template parameters cannot be friends");
8087 else if (TREE_CODE (type) == TYPENAME_TYPE)
8088 pedwarn ("friend declaration requires class-key, "
8089 "i.e. %<friend class %T::%D%>",
8090 TYPE_CONTEXT (type), TYPENAME_TYPE_FULLNAME (type));
8092 pedwarn ("friend declaration requires class-key, "
8093 "i.e. %<friend %#T%>",
8097 /* Only try to do this stuff if we didn't already give up. */
8098 if (type != integer_type_node)
8100 /* A friendly class? */
8101 if (current_class_type)
8102 make_friend_class (current_class_type, TYPE_MAIN_VARIANT (type),
8105 error ("trying to make class %qT a friend of global scope",
8108 type = void_type_node;
8111 else if (memfn_quals)
8113 if (ctype == NULL_TREE)
8115 if (TREE_CODE (type) != METHOD_TYPE)
8116 error ("invalid qualifiers on non-member function type");
8118 ctype = TYPE_METHOD_BASETYPE (type);
8121 type = build_memfn_type (type, ctype, memfn_quals);
8126 else if (unqualified_id == NULL_TREE && decl_context != PARM
8127 && decl_context != CATCHPARM
8128 && TREE_CODE (type) != UNION_TYPE
8131 error ("abstract declarator %qT used as declaration", type);
8132 return error_mark_node;
8135 /* Only functions may be declared using an operator-function-id. */
8137 && IDENTIFIER_OPNAME_P (unqualified_id)
8138 && TREE_CODE (type) != FUNCTION_TYPE
8139 && TREE_CODE (type) != METHOD_TYPE)
8141 error ("declaration of %qD as non-function", unqualified_id);
8142 return error_mark_node;
8145 /* We don't check parameter types here because we can emit a better
8146 error message later. */
8147 if (decl_context != PARM)
8149 type = check_var_type (unqualified_id, type);
8150 if (type == error_mark_node)
8151 return error_mark_node;
8154 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
8155 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
8157 if (decl_context == PARM || decl_context == CATCHPARM)
8159 if (ctype || in_namespace)
8160 error ("cannot use %<::%> in parameter declaration");
8162 /* A parameter declared as an array of T is really a pointer to T.
8163 One declared as a function is really a pointer to a function.
8164 One declared as a member is really a pointer to member. */
8166 if (TREE_CODE (type) == ARRAY_TYPE)
8168 /* Transfer const-ness of array into that of type pointed to. */
8169 type = build_pointer_type (TREE_TYPE (type));
8170 type_quals = TYPE_UNQUALIFIED;
8172 else if (TREE_CODE (type) == FUNCTION_TYPE)
8173 type = build_pointer_type (type);
8179 if (decl_context == PARM)
8181 decl = cp_build_parm_decl (unqualified_id, type);
8183 bad_specifiers (decl, "parameter", virtualp,
8184 memfn_quals != TYPE_UNQUALIFIED,
8185 inlinep, friendp, raises != NULL_TREE);
8187 else if (decl_context == FIELD)
8189 /* The C99 flexible array extension. */
8190 if (!staticp && TREE_CODE (type) == ARRAY_TYPE
8191 && TYPE_DOMAIN (type) == NULL_TREE)
8193 tree itype = compute_array_index_type (dname, integer_zero_node);
8194 type = build_cplus_array_type (TREE_TYPE (type), itype);
8197 if (type == error_mark_node)
8199 /* Happens when declaring arrays of sizes which
8200 are error_mark_node, for example. */
8203 else if (in_namespace && !friendp)
8205 /* Something like struct S { int N::j; }; */
8206 error ("invalid use of %<::%>");
8207 return error_mark_node;
8209 else if (TREE_CODE (type) == FUNCTION_TYPE)
8212 tree function_context;
8216 if (ctype == NULL_TREE)
8217 ctype = current_class_type;
8219 if (ctype == NULL_TREE)
8221 error ("can't make %qD into a method -- not in a class",
8223 return error_mark_node;
8226 /* ``A union may [ ... ] not [ have ] virtual functions.''
8228 if (virtualp && TREE_CODE (ctype) == UNION_TYPE)
8230 error ("function %qD declared virtual inside a union",
8232 return error_mark_node;
8235 if (NEW_DELETE_OPNAME_P (unqualified_id))
8239 error ("%qD cannot be declared virtual, since it "
8245 else if (staticp < 2)
8246 type = build_memfn_type (type, ctype, memfn_quals);
8249 /* Check that the name used for a destructor makes sense. */
8250 if (sfk == sfk_destructor)
8254 gcc_assert (friendp);
8255 error ("expected qualified name in friend declaration "
8256 "for destructor %qD",
8257 id_declarator->u.id.unqualified_name);
8258 return error_mark_node;
8261 if (!same_type_p (TREE_OPERAND
8262 (id_declarator->u.id.unqualified_name, 0),
8265 error ("declaration of %qD as member of %qT",
8266 id_declarator->u.id.unqualified_name, ctype);
8267 return error_mark_node;
8271 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
8272 function_context = (ctype != NULL_TREE) ?
8273 decl_function_context (TYPE_MAIN_DECL (ctype)) : NULL_TREE;
8274 publicp = (! friendp || ! staticp)
8275 && function_context == NULL_TREE;
8276 decl = grokfndecl (ctype, type,
8277 TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
8278 ? unqualified_id : dname,
8281 virtualp, flags, memfn_quals, raises,
8282 friendp ? -1 : 0, friendp, publicp, inlinep,
8284 funcdef_flag, template_count, in_namespace, attrlist);
8285 if (decl == NULL_TREE)
8286 return error_mark_node;
8288 /* This clobbers the attrs stored in `decl' from `attrlist'. */
8289 /* The decl and setting of decl_attr is also turned off. */
8290 decl = build_decl_attribute_variant (decl, decl_attr);
8293 /* [class.conv.ctor]
8295 A constructor declared without the function-specifier
8296 explicit that can be called with a single parameter
8297 specifies a conversion from the type of its first
8298 parameter to the type of its class. Such a constructor
8299 is called a converting constructor. */
8301 DECL_NONCONVERTING_P (decl) = 1;
8302 else if (DECL_CONSTRUCTOR_P (decl))
8304 /* The constructor can be called with exactly one
8305 parameter if there is at least one parameter, and
8306 any subsequent parameters have default arguments.
8307 Ignore any compiler-added parms. */
8308 tree arg_types = FUNCTION_FIRST_USER_PARMTYPE (decl);
8310 if (arg_types == void_list_node
8312 && TREE_CHAIN (arg_types)
8313 && TREE_CHAIN (arg_types) != void_list_node
8314 && !TREE_PURPOSE (TREE_CHAIN (arg_types))))
8315 DECL_NONCONVERTING_P (decl) = 1;
8318 else if (TREE_CODE (type) == METHOD_TYPE)
8320 /* We only get here for friend declarations of
8321 members of other classes. */
8322 /* All method decls are public, so tell grokfndecl to set
8323 TREE_PUBLIC, also. */
8324 decl = grokfndecl (ctype, type,
8325 TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
8326 ? unqualified_id : dname,
8329 virtualp, flags, memfn_quals, raises,
8330 friendp ? -1 : 0, friendp, 1, 0, sfk,
8331 funcdef_flag, template_count, in_namespace,
8333 if (decl == NULL_TREE)
8334 return error_mark_node;
8336 else if (!staticp && !dependent_type_p (type)
8337 && !COMPLETE_TYPE_P (complete_type (type))
8338 && (TREE_CODE (type) != ARRAY_TYPE || initialized == 0))
8341 error ("field %qD has incomplete type", unqualified_id);
8343 error ("name %qT has incomplete type", type);
8345 /* If we're instantiating a template, tell them which
8346 instantiation made the field's type be incomplete. */
8347 if (current_class_type
8348 && TYPE_NAME (current_class_type)
8349 && IDENTIFIER_TEMPLATE (TYPE_IDENTIFIER (current_class_type))
8351 && declspecs->type == type)
8352 error (" in instantiation of template %qT",
8353 current_class_type);
8355 return error_mark_node;
8361 error ("%qE is neither function nor member function; "
8362 "cannot be declared friend", unqualified_id);
8370 /* Friends are treated specially. */
8371 if (ctype == current_class_type)
8372 ; /* We already issued a pedwarn. */
8373 else if (decl && DECL_NAME (decl))
8375 if (template_class_depth (current_class_type) == 0)
8377 decl = check_explicit_specialization
8378 (unqualified_id, decl, template_count,
8379 2 * funcdef_flag + 4);
8380 if (decl == error_mark_node)
8381 return error_mark_node;
8384 decl = do_friend (ctype, unqualified_id, decl,
8390 return error_mark_node;
8393 /* Structure field. It may not be a function, except for C++. */
8395 if (decl == NULL_TREE)
8401 /* An attempt is being made to initialize a non-static
8402 member. But, from [class.mem]:
8404 4 A member-declarator can contain a
8405 constant-initializer only if it declares a static
8406 member (_class.static_) of integral or enumeration
8407 type, see _class.static.data_.
8409 This used to be relatively common practice, but
8410 the rest of the compiler does not correctly
8411 handle the initialization unless the member is
8412 static so we make it static below. */
8413 pedwarn ("ISO C++ forbids initialization of member %qD",
8415 pedwarn ("making %qD static", unqualified_id);
8419 if (uses_template_parms (type))
8420 /* We'll check at instantiation time. */
8422 else if (check_static_variable_definition (unqualified_id,
8424 /* If we just return the declaration, crashes
8425 will sometimes occur. We therefore return
8426 void_type_node, as if this was a friend
8427 declaration, to cause callers to completely
8428 ignore this declaration. */
8429 return error_mark_node;
8434 /* C++ allows static class members. All other work
8435 for this is done by grokfield. */
8436 decl = build_lang_decl (VAR_DECL, unqualified_id, type);
8437 set_linkage_for_static_data_member (decl);
8438 /* Even if there is an in-class initialization, DECL
8439 is considered undefined until an out-of-class
8440 definition is provided. */
8441 DECL_EXTERNAL (decl) = 1;
8445 if (targetm.have_tls)
8446 DECL_TLS_MODEL (decl) = decl_default_tls_model (decl);
8448 /* A mere warning is sure to result in improper
8449 semantics at runtime. Don't bother to allow this to
8451 error ("thread-local storage not supported for this target");
8456 decl = build_decl (FIELD_DECL, unqualified_id, type);
8457 DECL_NONADDRESSABLE_P (decl) = bitfield;
8458 if (storage_class == sc_mutable)
8460 DECL_MUTABLE_P (decl) = 1;
8461 storage_class = sc_none;
8465 bad_specifiers (decl, "field", virtualp,
8466 memfn_quals != TYPE_UNQUALIFIED,
8467 inlinep, friendp, raises != NULL_TREE);
8470 else if (TREE_CODE (type) == FUNCTION_TYPE
8471 || TREE_CODE (type) == METHOD_TYPE)
8476 if (!unqualified_id)
8477 return error_mark_node;
8479 if (TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR)
8480 original_name = dname;
8482 original_name = unqualified_id;
8484 if (storage_class == sc_auto)
8485 error ("storage class %<auto%> invalid for function %qs", name);
8486 else if (storage_class == sc_register)
8487 error ("storage class %<register%> invalid for function %qs", name);
8489 error ("storage class %<__thread%> invalid for function %qs", name);
8491 /* Function declaration not at top level.
8492 Storage classes other than `extern' are not allowed
8493 and `extern' makes no difference. */
8494 if (! toplevel_bindings_p ()
8495 && (storage_class == sc_static
8496 || declspecs->specs[(int)ds_inline])
8499 if (storage_class == sc_static)
8500 pedwarn ("%<static%> specified invalid for function %qs "
8501 "declared out of global scope", name);
8503 pedwarn ("%<inline%> specifier invalid for function %qs "
8504 "declared out of global scope", name);
8507 if (ctype == NULL_TREE)
8511 error ("virtual non-class function %qs", name);
8515 else if (TREE_CODE (type) == FUNCTION_TYPE && staticp < 2
8516 && !NEW_DELETE_OPNAME_P (original_name))
8517 type = build_method_type_directly (ctype,
8519 TYPE_ARG_TYPES (type));
8521 /* Record presence of `static'. */
8522 publicp = (ctype != NULL_TREE
8523 || storage_class == sc_extern
8524 || storage_class != sc_static);
8526 decl = grokfndecl (ctype, type, original_name, parms, unqualified_id,
8527 virtualp, flags, memfn_quals, raises,
8529 publicp, inlinep, sfk, funcdef_flag,
8530 template_count, in_namespace, attrlist);
8531 if (decl == NULL_TREE)
8532 return error_mark_node;
8536 int invalid_static = 0;
8538 /* Don't allow a static member function in a class, and forbid
8539 declaring main to be static. */
8540 if (TREE_CODE (type) == METHOD_TYPE)
8542 pedwarn ("cannot declare member function %qD to have "
8543 "static linkage", decl);
8546 else if (current_function_decl)
8548 /* FIXME need arm citation */
8549 error ("cannot declare static function inside another function");
8556 storage_class = sc_none;
8562 /* It's a variable. */
8564 /* An uninitialized decl with `extern' is a reference. */
8565 decl = grokvardecl (type, unqualified_id,
8568 (type_quals & TYPE_QUAL_CONST) != 0,
8569 ctype ? ctype : in_namespace);
8570 bad_specifiers (decl, "variable", virtualp,
8571 memfn_quals != TYPE_UNQUALIFIED,
8572 inlinep, friendp, raises != NULL_TREE);
8576 DECL_CONTEXT (decl) = ctype;
8579 pedwarn ("%<static%> may not be used when defining "
8580 "(as opposed to declaring) a static data member");
8582 storage_class = sc_none;
8584 if (storage_class == sc_register && TREE_STATIC (decl))
8586 error ("static member %qD declared %<register%>", decl);
8587 storage_class = sc_none;
8589 if (storage_class == sc_extern && pedantic)
8591 pedwarn ("cannot explicitly declare member %q#D to have "
8594 storage_class = sc_none;
8599 /* Record `register' declaration for warnings on &
8600 and in case doing stupid register allocation. */
8602 if (storage_class == sc_register)
8603 DECL_REGISTER (decl) = 1;
8604 else if (storage_class == sc_extern)
8605 DECL_THIS_EXTERN (decl) = 1;
8606 else if (storage_class == sc_static)
8607 DECL_THIS_STATIC (decl) = 1;
8609 /* Record constancy and volatility. There's no need to do this
8610 when processing a template; we'll do this for the instantiated
8611 declaration based on the type of DECL. */
8612 if (!processing_template_decl)
8613 cp_apply_type_quals_to_decl (type_quals, decl);
8619 /* Subroutine of start_function. Ensure that each of the parameter
8620 types (as listed in PARMS) is complete, as is required for a
8621 function definition. */
8624 require_complete_types_for_parms (tree parms)
8626 for (; parms; parms = TREE_CHAIN (parms))
8628 if (dependent_type_p (TREE_TYPE (parms)))
8630 if (!VOID_TYPE_P (TREE_TYPE (parms))
8631 && complete_type_or_else (TREE_TYPE (parms), parms))
8633 relayout_decl (parms);
8634 DECL_ARG_TYPE (parms) = type_passed_as (TREE_TYPE (parms));
8637 /* grokparms or complete_type_or_else will have already issued
8639 TREE_TYPE (parms) = error_mark_node;
8643 /* Returns nonzero if T is a local variable. */
8646 local_variable_p (tree t)
8648 if ((TREE_CODE (t) == VAR_DECL
8649 /* A VAR_DECL with a context that is a _TYPE is a static data
8651 && !TYPE_P (CP_DECL_CONTEXT (t))
8652 /* Any other non-local variable must be at namespace scope. */
8653 && !DECL_NAMESPACE_SCOPE_P (t))
8654 || (TREE_CODE (t) == PARM_DECL))
8660 /* Returns nonzero if T is an automatic local variable or a label.
8661 (These are the declarations that need to be remapped when the code
8662 containing them is duplicated.) */
8665 nonstatic_local_decl_p (tree t)
8667 return ((local_variable_p (t) && !TREE_STATIC (t))
8668 || TREE_CODE (t) == LABEL_DECL
8669 || TREE_CODE (t) == RESULT_DECL);
8672 /* Like local_variable_p, but suitable for use as a tree-walking
8676 local_variable_p_walkfn (tree *tp, int *walk_subtrees,
8677 void *data ATTRIBUTE_UNUSED)
8679 if (local_variable_p (*tp) && !DECL_ARTIFICIAL (*tp))
8681 else if (TYPE_P (*tp))
8688 /* Check that ARG, which is a default-argument expression for a
8689 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
8690 something goes wrong. DECL may also be a _TYPE node, rather than a
8691 DECL, if there is no DECL available. */
8694 check_default_argument (tree decl, tree arg)
8699 if (TREE_CODE (arg) == DEFAULT_ARG)
8700 /* We get a DEFAULT_ARG when looking at an in-class declaration
8701 with a default argument. Ignore the argument for now; we'll
8702 deal with it after the class is complete. */
8711 decl_type = TREE_TYPE (decl);
8713 if (arg == error_mark_node
8714 || decl == error_mark_node
8715 || TREE_TYPE (arg) == error_mark_node
8716 || decl_type == error_mark_node)
8717 /* Something already went wrong. There's no need to check
8719 return error_mark_node;
8721 /* [dcl.fct.default]
8723 A default argument expression is implicitly converted to the
8725 if (!TREE_TYPE (arg)
8726 || !can_convert_arg (decl_type, TREE_TYPE (arg), arg, LOOKUP_NORMAL))
8729 error ("default argument for %q#D has type %qT",
8730 decl, TREE_TYPE (arg));
8732 error ("default argument for parameter of type %qT has type %qT",
8733 decl_type, TREE_TYPE (arg));
8735 return error_mark_node;
8738 /* [dcl.fct.default]
8740 Local variables shall not be used in default argument
8743 The keyword `this' shall not be used in a default argument of a
8745 var = walk_tree_without_duplicates (&arg, local_variable_p_walkfn,
8749 error ("default argument %qE uses local variable %qD", arg, var);
8750 return error_mark_node;
8757 /* Decode the list of parameter types for a function type.
8758 Given the list of things declared inside the parens,
8759 return a list of types.
8761 If this parameter does not end with an ellipsis, we append
8764 *PARMS is set to the chain of PARM_DECLs created. */
8767 grokparms (cp_parameter_declarator *first_parm, tree *parms)
8769 tree result = NULL_TREE;
8770 tree decls = NULL_TREE;
8771 int ellipsis = !first_parm || first_parm->ellipsis_p;
8772 cp_parameter_declarator *parm;
8775 for (parm = first_parm; parm != NULL; parm = parm->next)
8777 tree type = NULL_TREE;
8778 tree init = parm->default_argument;
8782 if (parm == no_parameters)
8785 attrs = parm->decl_specifiers.attributes;
8786 parm->decl_specifiers.attributes = NULL_TREE;
8787 decl = grokdeclarator (parm->declarator, &parm->decl_specifiers,
8788 PARM, init != NULL_TREE, &attrs);
8789 if (! decl || TREE_TYPE (decl) == error_mark_node)
8793 cplus_decl_attributes (&decl, attrs, 0);
8795 type = TREE_TYPE (decl);
8796 if (VOID_TYPE_P (type))
8798 if (same_type_p (type, void_type_node)
8799 && DECL_SELF_REFERENCE_P (type)
8800 && !DECL_NAME (decl) && !result && !parm->next && !ellipsis)
8801 /* this is a parmlist of `(void)', which is ok. */
8803 cxx_incomplete_type_error (decl, type);
8804 /* It's not a good idea to actually create parameters of
8805 type `void'; other parts of the compiler assume that a
8806 void type terminates the parameter list. */
8807 type = error_mark_node;
8808 TREE_TYPE (decl) = error_mark_node;
8811 if (type != error_mark_node)
8813 /* Top-level qualifiers on the parameters are
8814 ignored for function types. */
8815 type = cp_build_qualified_type (type, 0);
8816 if (TREE_CODE (type) == METHOD_TYPE)
8818 error ("parameter %qD invalidly declared method type", decl);
8819 type = build_pointer_type (type);
8820 TREE_TYPE (decl) = type;
8822 else if (abstract_virtuals_error (decl, type))
8823 any_error = 1; /* Seems like a good idea. */
8824 else if (POINTER_TYPE_P (type))
8826 /* [dcl.fct]/6, parameter types cannot contain pointers
8827 (references) to arrays of unknown bound. */
8828 tree t = TREE_TYPE (type);
8829 int ptr = TYPE_PTR_P (type);
8835 else if (TREE_CODE (t) != ARRAY_TYPE)
8837 else if (!TYPE_DOMAIN (t))
8841 if (TREE_CODE (t) == ARRAY_TYPE)
8842 error ("parameter %qD includes %s to array of unknown "
8844 decl, ptr ? "pointer" : "reference", t);
8849 else if (init && !processing_template_decl)
8850 init = check_default_argument (decl, init);
8853 TREE_CHAIN (decl) = decls;
8855 result = tree_cons (init, type, result);
8857 decls = nreverse (decls);
8858 result = nreverse (result);
8860 result = chainon (result, void_list_node);
8867 /* D is a constructor or overloaded `operator='.
8869 Let T be the class in which D is declared. Then, this function
8872 -1 if D's is an ill-formed constructor or copy assignment operator
8873 whose first parameter is of type `T'.
8874 0 if D is not a copy constructor or copy assignment
8876 1 if D is a copy constructor or copy assignment operator whose
8877 first parameter is a reference to const qualified T.
8878 2 if D is a copy constructor or copy assignment operator whose
8879 first parameter is a reference to non-const qualified T.
8881 This function can be used as a predicate. Positive values indicate
8882 a copy constructor and nonzero values indicate a copy assignment
8892 gcc_assert (DECL_FUNCTION_MEMBER_P (d));
8894 if (TREE_CODE (d) == TEMPLATE_DECL
8895 || (DECL_TEMPLATE_INFO (d)
8896 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d))))
8897 /* Instantiations of template member functions are never copy
8898 functions. Note that member functions of templated classes are
8899 represented as template functions internally, and we must
8900 accept those as copy functions. */
8903 args = FUNCTION_FIRST_USER_PARMTYPE (d);
8907 arg_type = TREE_VALUE (args);
8908 if (arg_type == error_mark_node)
8911 if (TYPE_MAIN_VARIANT (arg_type) == DECL_CONTEXT (d))
8913 /* Pass by value copy assignment operator. */
8916 else if (TREE_CODE (arg_type) == REFERENCE_TYPE
8917 && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type)) == DECL_CONTEXT (d))
8919 if (CP_TYPE_CONST_P (TREE_TYPE (arg_type)))
8925 args = TREE_CHAIN (args);
8927 if (args && args != void_list_node && !TREE_PURPOSE (args))
8928 /* There are more non-optional args. */
8934 /* Remember any special properties of member function DECL. */
8936 void grok_special_member_properties (tree decl)
8940 if (!DECL_NONSTATIC_MEMBER_FUNCTION_P (decl))
8943 class_type = DECL_CONTEXT (decl);
8944 if (DECL_CONSTRUCTOR_P (decl))
8946 int ctor = copy_fn_p (decl);
8948 TYPE_HAS_CONSTRUCTOR (class_type) = 1;
8954 A non-template constructor for class X is a copy
8955 constructor if its first parameter is of type X&, const
8956 X&, volatile X& or const volatile X&, and either there
8957 are no other parameters or else all other parameters have
8958 default arguments. */
8959 TYPE_HAS_INIT_REF (class_type) = 1;
8961 TYPE_HAS_CONST_INIT_REF (class_type) = 1;
8963 else if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl)))
8964 TYPE_HAS_DEFAULT_CONSTRUCTOR (class_type) = 1;
8966 else if (DECL_OVERLOADED_OPERATOR_P (decl) == NOP_EXPR)
8970 A non-template assignment operator for class X is a copy
8971 assignment operator if its parameter is of type X, X&, const
8972 X&, volatile X& or const volatile X&. */
8974 int assop = copy_fn_p (decl);
8978 TYPE_HAS_ASSIGN_REF (class_type) = 1;
8980 TYPE_HAS_CONST_ASSIGN_REF (class_type) = 1;
8985 /* Check a constructor DECL has the correct form. Complains
8986 if the class has a constructor of the form X(X). */
8989 grok_ctor_properties (tree ctype, tree decl)
8991 int ctor_parm = copy_fn_p (decl);
8997 A declaration of a constructor for a class X is ill-formed if
8998 its first parameter is of type (optionally cv-qualified) X
8999 and either there are no other parameters or else all other
9000 parameters have default arguments.
9002 We *don't* complain about member template instantiations that
9003 have this form, though; they can occur as we try to decide
9004 what constructor to use during overload resolution. Since
9005 overload resolution will never prefer such a constructor to
9006 the non-template copy constructor (which is either explicitly
9007 or implicitly defined), there's no need to worry about their
9008 existence. Theoretically, they should never even be
9009 instantiated, but that's hard to forestall. */
9010 error ("invalid constructor; you probably meant %<%T (const %T&)%>",
9018 /* An operator with this code is unary, but can also be binary. */
9021 ambi_op_p (enum tree_code code)
9023 return (code == INDIRECT_REF
9024 || code == ADDR_EXPR
9025 || code == UNARY_PLUS_EXPR
9026 || code == NEGATE_EXPR
9027 || code == PREINCREMENT_EXPR
9028 || code == PREDECREMENT_EXPR);
9031 /* An operator with this name can only be unary. */
9034 unary_op_p (enum tree_code code)
9036 return (code == TRUTH_NOT_EXPR
9037 || code == BIT_NOT_EXPR
9038 || code == COMPONENT_REF
9039 || code == TYPE_EXPR);
9042 /* DECL is a declaration for an overloaded operator. If COMPLAIN is true,
9043 errors are issued for invalid declarations. */
9046 grok_op_properties (tree decl, bool complain)
9048 tree argtypes = TYPE_ARG_TYPES (TREE_TYPE (decl));
9050 int methodp = (TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE);
9051 tree name = DECL_NAME (decl);
9052 enum tree_code operator_code;
9057 /* Count the number of arguments and check for ellipsis. */
9058 for (argtype = argtypes, arity = 0;
9059 argtype && argtype != void_list_node;
9060 argtype = TREE_CHAIN (argtype))
9062 ellipsis_p = !argtype;
9064 class_type = DECL_CONTEXT (decl);
9065 if (class_type && !CLASS_TYPE_P (class_type))
9066 class_type = NULL_TREE;
9068 if (DECL_CONV_FN_P (decl))
9069 operator_code = TYPE_EXPR;
9073 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
9074 if (ansi_opname (CODE) == name) \
9076 operator_code = (CODE); \
9079 else if (ansi_assopname (CODE) == name) \
9081 operator_code = (CODE); \
9082 DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
9086 #include "operators.def"
9092 gcc_assert (operator_code != LAST_CPLUS_TREE_CODE);
9093 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
9096 switch (operator_code)
9099 TYPE_HAS_NEW_OPERATOR (class_type) = 1;
9103 TYPE_GETS_DELETE (class_type) |= 1;
9107 TYPE_HAS_ARRAY_NEW_OPERATOR (class_type) = 1;
9110 case VEC_DELETE_EXPR:
9111 TYPE_GETS_DELETE (class_type) |= 2;
9118 /* [basic.std.dynamic.allocation]/1:
9120 A program is ill-formed if an allocation function is declared
9121 in a namespace scope other than global scope or declared static
9124 The same also holds true for deallocation functions. */
9125 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR
9126 || operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
9128 if (DECL_NAMESPACE_SCOPE_P (decl))
9130 if (CP_DECL_CONTEXT (decl) != global_namespace)
9132 error ("%qD may not be declared within a namespace", decl);
9135 else if (!TREE_PUBLIC (decl))
9137 error ("%qD may not be declared as static", decl);
9143 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR)
9144 TREE_TYPE (decl) = coerce_new_type (TREE_TYPE (decl));
9145 else if (operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
9146 TREE_TYPE (decl) = coerce_delete_type (TREE_TYPE (decl));
9149 /* An operator function must either be a non-static member function
9150 or have at least one parameter of a class, a reference to a class,
9151 an enumeration, or a reference to an enumeration. 13.4.0.6 */
9152 if (! methodp || DECL_STATIC_FUNCTION_P (decl))
9154 if (operator_code == TYPE_EXPR
9155 || operator_code == CALL_EXPR
9156 || operator_code == COMPONENT_REF
9157 || operator_code == ARRAY_REF
9158 || operator_code == NOP_EXPR)
9160 error ("%qD must be a nonstatic member function", decl);
9167 if (DECL_STATIC_FUNCTION_P (decl))
9169 error ("%qD must be either a non-static member "
9170 "function or a non-member function", decl);
9174 for (p = argtypes; p && p != void_list_node; p = TREE_CHAIN (p))
9176 tree arg = non_reference (TREE_VALUE (p));
9177 if (arg == error_mark_node)
9180 /* IS_AGGR_TYPE, rather than CLASS_TYPE_P, is used
9181 because these checks are performed even on
9182 template functions. */
9183 if (IS_AGGR_TYPE (arg) || TREE_CODE (arg) == ENUMERAL_TYPE)
9187 if (!p || p == void_list_node)
9190 error ("%qD must have an argument of class or "
9191 "enumerated type", decl);
9197 /* There are no restrictions on the arguments to an overloaded
9199 if (operator_code == CALL_EXPR)
9202 /* Warn about conversion operators that will never be used. */
9203 if (IDENTIFIER_TYPENAME_P (name)
9204 && ! DECL_TEMPLATE_INFO (decl)
9206 /* Warn only declaring the function; there is no need to
9207 warn again about out-of-class definitions. */
9208 && class_type == current_class_type)
9210 tree t = TREE_TYPE (name);
9211 int ref = (TREE_CODE (t) == REFERENCE_TYPE);
9212 const char *what = 0;
9215 t = TYPE_MAIN_VARIANT (TREE_TYPE (t));
9217 if (TREE_CODE (t) == VOID_TYPE)
9219 else if (class_type)
9221 if (t == class_type)
9222 what = "the same type";
9223 /* Don't force t to be complete here. */
9224 else if (IS_AGGR_TYPE (t)
9225 && COMPLETE_TYPE_P (t)
9226 && DERIVED_FROM_P (t, class_type))
9227 what = "a base class";
9231 warning (OPT_Wconversion, "conversion to %s%s will never use a type "
9232 "conversion operator",
9233 ref ? "a reference to " : "", what);
9236 if (operator_code == COND_EXPR)
9239 error ("ISO C++ prohibits overloading operator ?:");
9242 else if (ellipsis_p)
9244 error ("%qD must not have variable number of arguments", decl);
9247 else if (ambi_op_p (operator_code))
9250 /* We pick the one-argument operator codes by default, so
9251 we don't have to change anything. */
9253 else if (arity == 2)
9255 /* If we thought this was a unary operator, we now know
9256 it to be a binary operator. */
9257 switch (operator_code)
9260 operator_code = MULT_EXPR;
9264 operator_code = BIT_AND_EXPR;
9267 case UNARY_PLUS_EXPR:
9268 operator_code = PLUS_EXPR;
9272 operator_code = MINUS_EXPR;
9275 case PREINCREMENT_EXPR:
9276 operator_code = POSTINCREMENT_EXPR;
9279 case PREDECREMENT_EXPR:
9280 operator_code = POSTDECREMENT_EXPR;
9287 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
9289 if ((operator_code == POSTINCREMENT_EXPR
9290 || operator_code == POSTDECREMENT_EXPR)
9291 && ! processing_template_decl
9292 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes)), integer_type_node))
9295 error ("postfix %qD must take %<int%> as its argument",
9298 error ("postfix %qD must take %<int%> as its second "
9306 error ("%qD must take either zero or one argument", decl);
9308 error ("%qD must take either one or two arguments", decl);
9312 /* More Effective C++ rule 6. */
9314 && (operator_code == POSTINCREMENT_EXPR
9315 || operator_code == POSTDECREMENT_EXPR
9316 || operator_code == PREINCREMENT_EXPR
9317 || operator_code == PREDECREMENT_EXPR))
9319 tree arg = TREE_VALUE (argtypes);
9320 tree ret = TREE_TYPE (TREE_TYPE (decl));
9321 if (methodp || TREE_CODE (arg) == REFERENCE_TYPE)
9322 arg = TREE_TYPE (arg);
9323 arg = TYPE_MAIN_VARIANT (arg);
9324 if (operator_code == PREINCREMENT_EXPR
9325 || operator_code == PREDECREMENT_EXPR)
9327 if (TREE_CODE (ret) != REFERENCE_TYPE
9328 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret)),
9330 warning (OPT_Weffc__, "prefix %qD should return %qT", decl,
9331 build_reference_type (arg));
9335 if (!same_type_p (TYPE_MAIN_VARIANT (ret), arg))
9336 warning (OPT_Weffc__, "postfix %qD should return %qT", decl, arg);
9340 else if (unary_op_p (operator_code))
9345 error ("%qD must take %<void%>", decl);
9347 error ("%qD must take exactly one argument", decl);
9351 else /* if (binary_op_p (operator_code)) */
9356 error ("%qD must take exactly one argument", decl);
9358 error ("%qD must take exactly two arguments", decl);
9362 /* More Effective C++ rule 7. */
9364 && (operator_code == TRUTH_ANDIF_EXPR
9365 || operator_code == TRUTH_ORIF_EXPR
9366 || operator_code == COMPOUND_EXPR))
9367 warning (OPT_Weffc__, "user-defined %qD always evaluates both arguments",
9371 /* Effective C++ rule 23. */
9374 && !DECL_ASSIGNMENT_OPERATOR_P (decl)
9375 && (operator_code == PLUS_EXPR
9376 || operator_code == MINUS_EXPR
9377 || operator_code == TRUNC_DIV_EXPR
9378 || operator_code == MULT_EXPR
9379 || operator_code == TRUNC_MOD_EXPR)
9380 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl))) == REFERENCE_TYPE)
9381 warning (OPT_Weffc__, "%qD should return by value", decl);
9384 for (; argtypes && argtypes != void_list_node;
9385 argtypes = TREE_CHAIN (argtypes))
9386 if (TREE_PURPOSE (argtypes))
9388 TREE_PURPOSE (argtypes) = NULL_TREE;
9389 if (operator_code == POSTINCREMENT_EXPR
9390 || operator_code == POSTDECREMENT_EXPR)
9393 pedwarn ("%qD cannot have default arguments", decl);
9397 error ("%qD cannot have default arguments", decl);
9405 /* Return a string giving the keyword associate with CODE. */
9408 tag_name (enum tag_types code)
9427 /* Name lookup in an elaborated-type-specifier (after the keyword
9428 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
9429 elaborated-type-specifier is invalid, issue a diagnostic and return
9430 error_mark_node; otherwise, return the *_TYPE to which it referred.
9431 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
9434 check_elaborated_type_specifier (enum tag_types tag_code,
9436 bool allow_template_p)
9442 struct S { struct S *p; };
9444 name lookup will find the TYPE_DECL for the implicit "S::S"
9445 typedef. Adjust for that here. */
9446 if (DECL_SELF_REFERENCE_P (decl))
9447 decl = TYPE_NAME (TREE_TYPE (decl));
9449 type = TREE_TYPE (decl);
9451 /* Check TEMPLATE_TYPE_PARM first because DECL_IMPLICIT_TYPEDEF_P
9452 is false for this case as well. */
9453 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
9455 error ("using template type parameter %qT after %qs",
9456 type, tag_name (tag_code));
9457 return error_mark_node;
9461 If the identifier resolves to a typedef-name or a template
9462 type-parameter, the elaborated-type-specifier is ill-formed.
9464 In other words, the only legitimate declaration to use in the
9465 elaborated type specifier is the implicit typedef created when
9466 the type is declared. */
9467 else if (!DECL_IMPLICIT_TYPEDEF_P (decl)
9468 && tag_code != typename_type)
9470 error ("using typedef-name %qD after %qs", decl, tag_name (tag_code));
9471 error ("%q+D has a previous declaration here", decl);
9472 return error_mark_node;
9474 else if (TREE_CODE (type) != RECORD_TYPE
9475 && TREE_CODE (type) != UNION_TYPE
9476 && tag_code != enum_type
9477 && tag_code != typename_type)
9479 error ("%qT referred to as %qs", type, tag_name (tag_code));
9480 error ("%q+T has a previous declaration here", type);
9481 return error_mark_node;
9483 else if (TREE_CODE (type) != ENUMERAL_TYPE
9484 && tag_code == enum_type)
9486 error ("%qT referred to as enum", type);
9487 error ("%q+T has a previous declaration here", type);
9488 return error_mark_node;
9490 else if (!allow_template_p
9491 && TREE_CODE (type) == RECORD_TYPE
9492 && CLASSTYPE_IS_TEMPLATE (type))
9494 /* If a class template appears as elaborated type specifier
9495 without a template header such as:
9497 template <class T> class C {};
9498 void f(class C); // No template header here
9500 then the required template argument is missing. */
9501 error ("template argument required for %<%s %T%>",
9502 tag_name (tag_code),
9503 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type)));
9504 return error_mark_node;
9510 /* Lookup NAME in elaborate type specifier in scope according to
9511 SCOPE and issue diagnostics if necessary.
9512 Return *_TYPE node upon success, NULL_TREE when the NAME is not
9513 found, and ERROR_MARK_NODE for type error. */
9516 lookup_and_check_tag (enum tag_types tag_code, tree name,
9517 tag_scope scope, bool template_header_p)
9521 if (scope == ts_global)
9523 /* First try ordinary name lookup, ignoring hidden class name
9524 injected via friend declaration. */
9525 decl = lookup_name_prefer_type (name, 2);
9526 /* If that fails, the name will be placed in the smallest
9527 non-class, non-function-prototype scope according to 3.3.1/5.
9528 We may already have a hidden name declared as friend in this
9529 scope. So lookup again but not ignoring hidden names.
9530 If we find one, that name will be made visible rather than
9531 creating a new tag. */
9533 decl = lookup_type_scope (name, ts_within_enclosing_non_class);
9536 decl = lookup_type_scope (name, scope);
9538 if (decl && DECL_CLASS_TEMPLATE_P (decl))
9539 decl = DECL_TEMPLATE_RESULT (decl);
9541 if (decl && TREE_CODE (decl) == TYPE_DECL)
9543 /* Look for invalid nested type:
9547 if (scope == ts_current && DECL_SELF_REFERENCE_P (decl))
9549 error ("%qD has the same name as the class in which it is "
9552 return error_mark_node;
9555 /* Two cases we need to consider when deciding if a class
9556 template is allowed as an elaborated type specifier:
9557 1. It is a self reference to its own class.
9558 2. It comes with a template header.
9562 template <class T> class C {
9563 class C *c1; // DECL_SELF_REFERENCE_P is true
9566 template <class U> class C; // template_header_p is true
9567 template <class T> class C<T>::D {
9568 class C *c2; // DECL_SELF_REFERENCE_P is true
9571 t = check_elaborated_type_specifier (tag_code,
9574 | DECL_SELF_REFERENCE_P (decl));
9581 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
9582 Define the tag as a forward-reference if it is not defined.
9584 If a declaration is given, process it here, and report an error if
9585 multiple declarations are not identical.
9587 SCOPE is TS_CURRENT when this is also a definition. Only look in
9588 the current frame for the name (since C++ allows new names in any
9589 scope.) It is TS_WITHIN_ENCLOSING_NON_CLASS if this is a friend
9590 declaration. Only look beginning from the current scope outward up
9591 till the nearest non-class scope. Otherwise it is TS_GLOBAL.
9593 TEMPLATE_HEADER_P is true when this declaration is preceded by
9594 a set of template parameters. */
9597 xref_tag (enum tag_types tag_code, tree name,
9598 tag_scope scope, bool template_header_p)
9600 enum tree_code code;
9602 tree context = NULL_TREE;
9604 timevar_push (TV_NAME_LOOKUP);
9606 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
9618 code = ENUMERAL_TYPE;
9624 /* In case of anonymous name, xref_tag is only called to
9625 make type node and push name. Name lookup is not required. */
9626 if (ANON_AGGRNAME_P (name))
9629 t = lookup_and_check_tag (tag_code, name,
9630 scope, template_header_p);
9632 if (t == error_mark_node)
9633 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
9635 if (scope != ts_current && t && current_class_type
9636 && template_class_depth (current_class_type)
9637 && template_header_p)
9639 /* Since SCOPE is not TS_CURRENT, we are not looking at a
9640 definition of this tag. Since, in addition, we are currently
9641 processing a (member) template declaration of a template
9642 class, we must be very careful; consider:
9649 { template <class V>
9650 friend struct S1; };
9652 Here, the S2::S1 declaration should not be confused with the
9653 outer declaration. In particular, the inner version should
9654 have a template parameter of level 2, not level 1. This
9655 would be particularly important if the member declaration
9658 template <class V = U> friend struct S1;
9660 say, when we should tsubst into `U' when instantiating
9661 S2. On the other hand, when presented with:
9671 we must find the inner binding eventually. We
9672 accomplish this by making sure that the new type we
9673 create to represent this declaration has the right
9675 context = TYPE_CONTEXT (t);
9681 /* If no such tag is yet defined, create a forward-reference node
9682 and record it as the "definition".
9683 When a real declaration of this type is found,
9684 the forward-reference will be altered into a real type. */
9685 if (code == ENUMERAL_TYPE)
9687 error ("use of enum %q#D without previous declaration", name);
9688 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
9692 t = make_aggr_type (code);
9693 TYPE_CONTEXT (t) = context;
9694 t = pushtag (name, t, scope);
9699 if (template_header_p && IS_AGGR_TYPE (t))
9701 if (!redeclare_class_template (t, current_template_parms))
9702 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
9704 else if (!processing_template_decl
9706 && CLASSTYPE_IS_TEMPLATE (t))
9708 error ("redeclaration of %qT as a non-template", t);
9709 error ("previous declaration %q+D", t);
9710 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
9713 /* Make injected friend class visible. */
9714 if (scope != ts_within_enclosing_non_class
9715 && hidden_name_p (TYPE_NAME (t)))
9717 DECL_ANTICIPATED (TYPE_NAME (t)) = 0;
9718 DECL_FRIEND_P (TYPE_NAME (t)) = 0;
9720 if (TYPE_TEMPLATE_INFO (t))
9722 DECL_ANTICIPATED (TYPE_TI_TEMPLATE (t)) = 0;
9723 DECL_FRIEND_P (TYPE_TI_TEMPLATE (t)) = 0;
9728 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, t);
9732 xref_tag_from_type (tree old, tree id, tag_scope scope)
9734 enum tag_types tag_kind;
9736 if (TREE_CODE (old) == RECORD_TYPE)
9737 tag_kind = (CLASSTYPE_DECLARED_CLASS (old) ? class_type : record_type);
9739 tag_kind = union_type;
9741 if (id == NULL_TREE)
9742 id = TYPE_IDENTIFIER (old);
9744 return xref_tag (tag_kind, id, scope, false);
9747 /* Create the binfo hierarchy for REF with (possibly NULL) base list
9748 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
9749 access_* node, and the TREE_VALUE is the type of the base-class.
9750 Non-NULL TREE_TYPE indicates virtual inheritance.
9752 Returns true if the binfo hierarchy was successfully created,
9753 false if an error was detected. */
9756 xref_basetypes (tree ref, tree base_list)
9759 tree binfo, base_binfo;
9760 unsigned max_vbases = 0; /* Maximum direct & indirect virtual bases. */
9761 unsigned max_bases = 0; /* Maximum direct bases. */
9763 tree default_access;
9764 tree igo_prev; /* Track Inheritance Graph Order. */
9766 if (ref == error_mark_node)
9769 /* The base of a derived class is private by default, all others are
9771 default_access = (TREE_CODE (ref) == RECORD_TYPE
9772 && CLASSTYPE_DECLARED_CLASS (ref)
9773 ? access_private_node : access_public_node);
9775 /* First, make sure that any templates in base-classes are
9776 instantiated. This ensures that if we call ourselves recursively
9777 we do not get confused about which classes are marked and which
9782 tree basetype = TREE_VALUE (*basep);
9784 if (!(processing_template_decl && uses_template_parms (basetype))
9785 && !complete_type_or_else (basetype, NULL))
9786 /* An incomplete type. Remove it from the list. */
9787 *basep = TREE_CHAIN (*basep);
9791 if (TREE_TYPE (*basep))
9793 if (CLASS_TYPE_P (basetype))
9794 max_vbases += VEC_length (tree, CLASSTYPE_VBASECLASSES (basetype));
9795 basep = &TREE_CHAIN (*basep);
9799 TYPE_MARKED_P (ref) = 1;
9801 /* The binfo slot should be empty, unless this is an (ill-formed)
9803 gcc_assert (!TYPE_BINFO (ref) || TYPE_SIZE (ref));
9804 gcc_assert (TYPE_MAIN_VARIANT (ref) == ref);
9806 binfo = make_tree_binfo (max_bases);
9808 TYPE_BINFO (ref) = binfo;
9809 BINFO_OFFSET (binfo) = size_zero_node;
9810 BINFO_TYPE (binfo) = ref;
9814 BINFO_BASE_ACCESSES (binfo) = VEC_alloc (tree, gc, max_bases);
9815 /* An aggregate cannot have baseclasses. */
9816 CLASSTYPE_NON_AGGREGATE (ref) = 1;
9818 if (TREE_CODE (ref) == UNION_TYPE)
9820 error ("derived union %qT invalid", ref);
9827 if (TYPE_FOR_JAVA (ref))
9829 error ("Java class %qT cannot have multiple bases", ref);
9836 CLASSTYPE_VBASECLASSES (ref) = VEC_alloc (tree, gc, max_vbases);
9838 if (TYPE_FOR_JAVA (ref))
9840 error ("Java class %qT cannot have virtual bases", ref);
9845 for (igo_prev = binfo; base_list; base_list = TREE_CHAIN (base_list))
9847 tree access = TREE_PURPOSE (base_list);
9848 int via_virtual = TREE_TYPE (base_list) != NULL_TREE;
9849 tree basetype = TREE_VALUE (base_list);
9851 if (access == access_default_node)
9852 access = default_access;
9854 if (TREE_CODE (basetype) == TYPE_DECL)
9855 basetype = TREE_TYPE (basetype);
9856 if (TREE_CODE (basetype) != RECORD_TYPE
9857 && TREE_CODE (basetype) != TYPENAME_TYPE
9858 && TREE_CODE (basetype) != TEMPLATE_TYPE_PARM
9859 && TREE_CODE (basetype) != BOUND_TEMPLATE_TEMPLATE_PARM)
9861 error ("base type %qT fails to be a struct or class type",
9866 if (TYPE_FOR_JAVA (basetype) && (current_lang_depth () == 0))
9867 TYPE_FOR_JAVA (ref) = 1;
9869 base_binfo = NULL_TREE;
9870 if (CLASS_TYPE_P (basetype) && !dependent_type_p (basetype))
9872 base_binfo = TYPE_BINFO (basetype);
9873 /* The original basetype could have been a typedef'd type. */
9874 basetype = BINFO_TYPE (base_binfo);
9876 /* Inherit flags from the base. */
9877 TYPE_HAS_NEW_OPERATOR (ref)
9878 |= TYPE_HAS_NEW_OPERATOR (basetype);
9879 TYPE_HAS_ARRAY_NEW_OPERATOR (ref)
9880 |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype);
9881 TYPE_GETS_DELETE (ref) |= TYPE_GETS_DELETE (basetype);
9882 TYPE_HAS_CONVERSION (ref) |= TYPE_HAS_CONVERSION (basetype);
9883 CLASSTYPE_DIAMOND_SHAPED_P (ref)
9884 |= CLASSTYPE_DIAMOND_SHAPED_P (basetype);
9885 CLASSTYPE_REPEATED_BASE_P (ref)
9886 |= CLASSTYPE_REPEATED_BASE_P (basetype);
9889 /* We must do this test after we've seen through a typedef
9891 if (TYPE_MARKED_P (basetype))
9893 if (basetype == ref)
9894 error ("recursive type %qT undefined", basetype);
9896 error ("duplicate base type %qT invalid", basetype);
9899 TYPE_MARKED_P (basetype) = 1;
9901 base_binfo = copy_binfo (base_binfo, basetype, ref,
9902 &igo_prev, via_virtual);
9903 if (!BINFO_INHERITANCE_CHAIN (base_binfo))
9904 BINFO_INHERITANCE_CHAIN (base_binfo) = binfo;
9906 BINFO_BASE_APPEND (binfo, base_binfo);
9907 BINFO_BASE_ACCESS_APPEND (binfo, access);
9910 if (VEC_space (tree, CLASSTYPE_VBASECLASSES (ref), 1))
9911 /* If we have space in the vbase vector, we must have shared at
9912 least one of them, and are therefore diamond shaped. */
9913 CLASSTYPE_DIAMOND_SHAPED_P (ref) = 1;
9915 /* Unmark all the types. */
9916 for (i = 0; BINFO_BASE_ITERATE (binfo, i, base_binfo); i++)
9917 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
9918 TYPE_MARKED_P (ref) = 0;
9920 /* Now see if we have a repeated base type. */
9921 if (!CLASSTYPE_REPEATED_BASE_P (ref))
9923 for (base_binfo = binfo; base_binfo;
9924 base_binfo = TREE_CHAIN (base_binfo))
9926 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
9928 CLASSTYPE_REPEATED_BASE_P (ref) = 1;
9931 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 1;
9933 for (base_binfo = binfo; base_binfo;
9934 base_binfo = TREE_CHAIN (base_binfo))
9935 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
9936 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
9945 /* Begin compiling the definition of an enumeration type.
9947 Returns the type object, as yet incomplete.
9948 Also records info about it so that build_enumerator
9949 may be used to declare the individual values as they are read. */
9952 start_enum (tree name)
9956 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
9958 /* If this is the real definition for a previous forward reference,
9959 fill in the contents in the same object that used to be the
9960 forward reference. */
9962 enumtype = lookup_and_check_tag (enum_type, name,
9963 /*tag_scope=*/ts_current,
9964 /*template_header_p=*/false);
9966 if (enumtype != NULL_TREE && TREE_CODE (enumtype) == ENUMERAL_TYPE)
9968 error ("multiple definition of %q#T", enumtype);
9969 error ("%Jprevious definition here", TYPE_MAIN_DECL (enumtype));
9970 /* Clear out TYPE_VALUES, and start again. */
9971 TYPE_VALUES (enumtype) = NULL_TREE;
9975 /* In case of error, make a dummy enum to allow parsing to
9977 if (enumtype == error_mark_node)
9978 name = make_anon_name ();
9980 enumtype = make_node (ENUMERAL_TYPE);
9981 enumtype = pushtag (name, enumtype, /*tag_scope=*/ts_current);
9987 /* After processing and defining all the values of an enumeration type,
9988 install their decls in the enumeration type and finish it off.
9989 ENUMTYPE is the type object and VALUES a list of name-value pairs. */
9992 finish_enum (tree enumtype)
10001 bool use_short_enum;
10005 integer_type_kind itk;
10006 tree underlying_type = NULL_TREE;
10008 /* We built up the VALUES in reverse order. */
10009 TYPE_VALUES (enumtype) = nreverse (TYPE_VALUES (enumtype));
10011 /* For an enum defined in a template, just set the type of the values;
10012 all further processing is postponed until the template is
10013 instantiated. We need to set the type so that tsubst of a CONST_DECL
10015 if (processing_template_decl)
10017 for (values = TYPE_VALUES (enumtype);
10019 values = TREE_CHAIN (values))
10020 TREE_TYPE (TREE_VALUE (values)) = enumtype;
10021 if (at_function_scope_p ())
10022 add_stmt (build_min (TAG_DEFN, enumtype));
10026 /* Determine the minimum and maximum values of the enumerators. */
10027 if (TYPE_VALUES (enumtype))
10029 minnode = maxnode = NULL_TREE;
10031 for (values = TYPE_VALUES (enumtype);
10033 values = TREE_CHAIN (values))
10035 decl = TREE_VALUE (values);
10037 /* [dcl.enum]: Following the closing brace of an enum-specifier,
10038 each enumerator has the type of its enumeration. Prior to the
10039 closing brace, the type of each enumerator is the type of its
10040 initializing value. */
10041 TREE_TYPE (decl) = enumtype;
10043 /* Update the minimum and maximum values, if appropriate. */
10044 value = DECL_INITIAL (decl);
10045 if (value == error_mark_node)
10046 value = integer_zero_node;
10047 /* Figure out what the minimum and maximum values of the
10048 enumerators are. */
10050 minnode = maxnode = value;
10051 else if (tree_int_cst_lt (maxnode, value))
10053 else if (tree_int_cst_lt (value, minnode))
10060 If the enumerator-list is empty, the underlying type is as if
10061 the enumeration had a single enumerator with value 0. */
10062 minnode = maxnode = integer_zero_node;
10064 /* Compute the number of bits require to represent all values of the
10065 enumeration. We must do this before the type of MINNODE and
10066 MAXNODE are transformed, since min_precision relies on the
10067 TREE_TYPE of the value it is passed. */
10068 unsignedp = tree_int_cst_sgn (minnode) >= 0;
10069 lowprec = min_precision (minnode, unsignedp);
10070 highprec = min_precision (maxnode, unsignedp);
10071 precision = MAX (lowprec, highprec);
10073 /* Determine the underlying type of the enumeration.
10077 The underlying type of an enumeration is an integral type that
10078 can represent all the enumerator values defined in the
10079 enumeration. It is implementation-defined which integral type is
10080 used as the underlying type for an enumeration except that the
10081 underlying type shall not be larger than int unless the value of
10082 an enumerator cannot fit in an int or unsigned int.
10084 We use "int" or an "unsigned int" as the underlying type, even if
10085 a smaller integral type would work, unless the user has
10086 explicitly requested that we use the smallest possible type. The
10087 user can request that for all enumerations with a command line
10088 flag, or for just one enumeration with an attribute. */
10090 use_short_enum = flag_short_enums
10091 || lookup_attribute ("packed", TYPE_ATTRIBUTES (enumtype));
10093 for (itk = (use_short_enum ? itk_char : itk_int);
10097 underlying_type = integer_types[itk];
10098 if (TYPE_PRECISION (underlying_type) >= precision
10099 && TYPE_UNSIGNED (underlying_type) == unsignedp)
10102 if (itk == itk_none)
10106 IF no integral type can represent all the enumerator values, the
10107 enumeration is ill-formed. */
10108 error ("no integral type can represent all of the enumerator values "
10109 "for %qT", enumtype);
10110 precision = TYPE_PRECISION (long_long_integer_type_node);
10111 underlying_type = integer_types[itk_unsigned_long_long];
10114 /* Compute the minium and maximum values for the type.
10118 For an enumeration where emin is the smallest enumerator and emax
10119 is the largest, the values of the enumeration are the values of the
10120 underlying type in the range bmin to bmax, where bmin and bmax are,
10121 respectively, the smallest and largest values of the smallest bit-
10122 field that can store emin and emax. */
10124 /* The middle-end currently assumes that types with TYPE_PRECISION
10125 narrower than their underlying type are suitably zero or sign
10126 extended to fill their mode. g++ doesn't make these guarantees.
10127 Until the middle-end can represent such paradoxical types, we
10128 set the TYPE_PRECISION to the width of the underlying type. */
10129 TYPE_PRECISION (enumtype) = TYPE_PRECISION (underlying_type);
10131 set_min_and_max_values_for_integral_type (enumtype, precision, unsignedp);
10135 The value of sizeof() applied to an enumeration type, an object
10136 of an enumeration type, or an enumerator, is the value of sizeof()
10137 applied to the underlying type. */
10138 TYPE_SIZE (enumtype) = TYPE_SIZE (underlying_type);
10139 TYPE_SIZE_UNIT (enumtype) = TYPE_SIZE_UNIT (underlying_type);
10140 TYPE_MODE (enumtype) = TYPE_MODE (underlying_type);
10141 TYPE_ALIGN (enumtype) = TYPE_ALIGN (underlying_type);
10142 TYPE_USER_ALIGN (enumtype) = TYPE_USER_ALIGN (underlying_type);
10143 TYPE_UNSIGNED (enumtype) = TYPE_UNSIGNED (underlying_type);
10145 /* Convert each of the enumerators to the type of the underlying
10146 type of the enumeration. */
10147 for (values = TYPE_VALUES (enumtype); values; values = TREE_CHAIN (values))
10149 location_t saved_location;
10151 decl = TREE_VALUE (values);
10152 saved_location = input_location;
10153 input_location = DECL_SOURCE_LOCATION (decl);
10154 value = perform_implicit_conversion (underlying_type,
10155 DECL_INITIAL (decl));
10156 input_location = saved_location;
10158 /* Do not clobber shared ints. */
10159 value = copy_node (value);
10161 TREE_TYPE (value) = enumtype;
10162 DECL_INITIAL (decl) = value;
10163 TREE_VALUE (values) = value;
10166 /* Fix up all variant types of this enum type. */
10167 for (t = TYPE_MAIN_VARIANT (enumtype); t; t = TYPE_NEXT_VARIANT (t))
10169 TYPE_VALUES (t) = TYPE_VALUES (enumtype);
10170 TYPE_MIN_VALUE (t) = TYPE_MIN_VALUE (enumtype);
10171 TYPE_MAX_VALUE (t) = TYPE_MAX_VALUE (enumtype);
10172 TYPE_SIZE (t) = TYPE_SIZE (enumtype);
10173 TYPE_SIZE_UNIT (t) = TYPE_SIZE_UNIT (enumtype);
10174 TYPE_MODE (t) = TYPE_MODE (enumtype);
10175 TYPE_PRECISION (t) = TYPE_PRECISION (enumtype);
10176 TYPE_ALIGN (t) = TYPE_ALIGN (enumtype);
10177 TYPE_USER_ALIGN (t) = TYPE_USER_ALIGN (enumtype);
10178 TYPE_UNSIGNED (t) = TYPE_UNSIGNED (enumtype);
10181 /* Finish debugging output for this type. */
10182 rest_of_type_compilation (enumtype, namespace_bindings_p ());
10185 /* Build and install a CONST_DECL for an enumeration constant of the
10186 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
10187 Assignment of sequential values by default is handled here. */
10190 build_enumerator (tree name, tree value, tree enumtype)
10196 /* If the VALUE was erroneous, pretend it wasn't there; that will
10197 result in the enum being assigned the next value in sequence. */
10198 if (value == error_mark_node)
10201 /* Remove no-op casts from the value. */
10203 STRIP_TYPE_NOPS (value);
10205 if (! processing_template_decl)
10207 /* Validate and default VALUE. */
10208 if (value != NULL_TREE)
10210 value = integral_constant_value (value);
10212 if (TREE_CODE (value) == INTEGER_CST)
10214 value = perform_integral_promotions (value);
10215 constant_expression_warning (value);
10219 error ("enumerator value for %qD not integer constant", name);
10224 /* Default based on previous value. */
10225 if (value == NULL_TREE)
10227 if (TYPE_VALUES (enumtype))
10230 unsigned HOST_WIDE_INT lo;
10234 /* The next value is the previous value plus one. We can
10235 safely assume that the previous value is an INTEGER_CST.
10236 add_double doesn't know the type of the target expression,
10237 so we must check with int_fits_type_p as well. */
10238 prev_value = DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype)));
10239 overflowed = add_double (TREE_INT_CST_LOW (prev_value),
10240 TREE_INT_CST_HIGH (prev_value),
10242 value = build_int_cst_wide (TREE_TYPE (prev_value), lo, hi);
10243 overflowed |= !int_fits_type_p (value, TREE_TYPE (prev_value));
10247 error ("overflow in enumeration values at %qD", name);
10248 value = error_mark_node;
10252 value = integer_zero_node;
10255 /* Remove no-op casts from the value. */
10256 STRIP_TYPE_NOPS (value);
10259 /* C++ associates enums with global, function, or class declarations. */
10260 context = current_scope ();
10262 /* Build the actual enumeration constant. Note that the enumeration
10263 constants have the type of their initializers until the
10264 enumeration is complete:
10268 Following the closing brace of an enum-specifier, each enumer-
10269 ator has the type of its enumeration. Prior to the closing
10270 brace, the type of each enumerator is the type of its
10271 initializing value.
10273 In finish_enum we will reset the type. Of course, if we're
10274 processing a template, there may be no value. */
10275 type = value ? TREE_TYPE (value) : NULL_TREE;
10277 if (context && context == current_class_type)
10278 /* This enum declaration is local to the class. We need the full
10279 lang_decl so that we can record DECL_CLASS_CONTEXT, for example. */
10280 decl = build_lang_decl (CONST_DECL, name, type);
10282 /* It's a global enum, or it's local to a function. (Note local to
10283 a function could mean local to a class method. */
10284 decl = build_decl (CONST_DECL, name, type);
10286 DECL_CONTEXT (decl) = FROB_CONTEXT (context);
10287 TREE_CONSTANT (decl) = 1;
10288 TREE_INVARIANT (decl) = 1;
10289 TREE_READONLY (decl) = 1;
10290 DECL_INITIAL (decl) = value;
10292 if (context && context == current_class_type)
10293 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
10294 on the TYPE_FIELDS list for `S'. (That's so that you can say
10295 things like `S::i' later.) */
10296 finish_member_declaration (decl);
10300 /* Add this enumeration constant to the list for this type. */
10301 TYPE_VALUES (enumtype) = tree_cons (name, decl, TYPE_VALUES (enumtype));
10305 /* We're defining DECL. Make sure that it's type is OK. */
10308 check_function_type (tree decl, tree current_function_parms)
10310 tree fntype = TREE_TYPE (decl);
10311 tree return_type = complete_type (TREE_TYPE (fntype));
10313 /* In a function definition, arg types must be complete. */
10314 require_complete_types_for_parms (current_function_parms);
10316 if (dependent_type_p (return_type))
10318 if (!COMPLETE_OR_VOID_TYPE_P (return_type))
10320 tree args = TYPE_ARG_TYPES (fntype);
10322 error ("return type %q#T is incomplete", return_type);
10324 /* Make it return void instead. */
10325 if (TREE_CODE (fntype) == METHOD_TYPE)
10326 fntype = build_method_type_directly (TREE_TYPE (TREE_VALUE (args)),
10328 TREE_CHAIN (args));
10330 fntype = build_function_type (void_type_node, args);
10332 = build_exception_variant (fntype,
10333 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (decl)));
10336 abstract_virtuals_error (decl, TREE_TYPE (fntype));
10339 /* Create the FUNCTION_DECL for a function definition.
10340 DECLSPECS and DECLARATOR are the parts of the declaration;
10341 they describe the function's name and the type it returns,
10342 but twisted together in a fashion that parallels the syntax of C.
10344 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
10345 DECLARATOR is really the DECL for the function we are about to
10346 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
10347 indicating that the function is an inline defined in-class.
10349 This function creates a binding context for the function body
10350 as well as setting up the FUNCTION_DECL in current_function_decl.
10352 For C++, we must first check whether that datum makes any sense.
10353 For example, "class A local_a(1,2);" means that variable local_a
10354 is an aggregate of type A, which should have a constructor
10355 applied to it with the argument list [1, 2]. */
10358 start_preparsed_function (tree decl1, tree attrs, int flags)
10360 tree ctype = NULL_TREE;
10363 int doing_friend = 0;
10364 struct cp_binding_level *bl;
10365 tree current_function_parms;
10366 struct c_fileinfo *finfo
10367 = get_fileinfo (LOCATION_FILE (DECL_SOURCE_LOCATION (decl1)));
10368 bool honor_interface;
10370 /* Sanity check. */
10371 gcc_assert (TREE_CODE (TREE_VALUE (void_list_node)) == VOID_TYPE);
10372 gcc_assert (TREE_CHAIN (void_list_node) == NULL_TREE);
10374 fntype = TREE_TYPE (decl1);
10375 if (TREE_CODE (fntype) == METHOD_TYPE)
10376 ctype = TYPE_METHOD_BASETYPE (fntype);
10378 /* ISO C++ 11.4/5. A friend function defined in a class is in
10379 the (lexical) scope of the class in which it is defined. */
10380 if (!ctype && DECL_FRIEND_P (decl1))
10382 ctype = DECL_FRIEND_CONTEXT (decl1);
10384 /* CTYPE could be null here if we're dealing with a template;
10385 for example, `inline friend float foo()' inside a template
10386 will have no CTYPE set. */
10387 if (ctype && TREE_CODE (ctype) != RECORD_TYPE)
10393 if (DECL_DECLARED_INLINE_P (decl1)
10394 && lookup_attribute ("noinline", attrs))
10395 warning (0, "inline function %q+D given attribute noinline", decl1);
10397 if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1))
10398 /* This is a constructor, we must ensure that any default args
10399 introduced by this definition are propagated to the clones
10400 now. The clones are used directly in overload resolution. */
10401 adjust_clone_args (decl1);
10403 /* Sometimes we don't notice that a function is a static member, and
10404 build a METHOD_TYPE for it. Fix that up now. */
10405 if (ctype != NULL_TREE && DECL_STATIC_FUNCTION_P (decl1)
10406 && TREE_CODE (TREE_TYPE (decl1)) == METHOD_TYPE)
10408 revert_static_member_fn (decl1);
10412 /* Set up current_class_type, and enter the scope of the class, if
10415 push_nested_class (ctype);
10416 else if (DECL_STATIC_FUNCTION_P (decl1))
10417 push_nested_class (DECL_CONTEXT (decl1));
10419 /* Now that we have entered the scope of the class, we must restore
10420 the bindings for any template parameters surrounding DECL1, if it
10421 is an inline member template. (Order is important; consider the
10422 case where a template parameter has the same name as a field of
10423 the class.) It is not until after this point that
10424 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
10425 if (flags & SF_INCLASS_INLINE)
10426 maybe_begin_member_template_processing (decl1);
10428 /* Effective C++ rule 15. */
10430 && DECL_OVERLOADED_OPERATOR_P (decl1) == NOP_EXPR
10431 && TREE_CODE (TREE_TYPE (fntype)) == VOID_TYPE)
10432 warning (OPT_Weffc__, "%<operator=%> should return a reference to %<*this%>");
10434 /* Make the init_value nonzero so pushdecl knows this is not tentative.
10435 error_mark_node is replaced below (in poplevel) with the BLOCK. */
10436 if (!DECL_INITIAL (decl1))
10437 DECL_INITIAL (decl1) = error_mark_node;
10439 /* This function exists in static storage.
10440 (This does not mean `static' in the C sense!) */
10441 TREE_STATIC (decl1) = 1;
10443 /* We must call push_template_decl after current_class_type is set
10444 up. (If we are processing inline definitions after exiting a
10445 class scope, current_class_type will be NULL_TREE until set above
10446 by push_nested_class.) */
10447 if (processing_template_decl)
10449 /* FIXME: Handle error_mark_node more gracefully. */
10450 tree newdecl1 = push_template_decl (decl1);
10451 if (newdecl1 != error_mark_node)
10455 /* We are now in the scope of the function being defined. */
10456 current_function_decl = decl1;
10458 /* Save the parm names or decls from this function's declarator
10459 where store_parm_decls will find them. */
10460 current_function_parms = DECL_ARGUMENTS (decl1);
10462 /* Make sure the parameter and return types are reasonable. When
10463 you declare a function, these types can be incomplete, but they
10464 must be complete when you define the function. */
10465 check_function_type (decl1, current_function_parms);
10467 /* Build the return declaration for the function. */
10468 restype = TREE_TYPE (fntype);
10469 /* Promote the value to int before returning it. */
10470 if (c_promoting_integer_type_p (restype))
10471 restype = type_promotes_to (restype);
10472 if (DECL_RESULT (decl1) == NULL_TREE)
10476 resdecl = build_decl (RESULT_DECL, 0, TYPE_MAIN_VARIANT (restype));
10477 DECL_ARTIFICIAL (resdecl) = 1;
10478 DECL_IGNORED_P (resdecl) = 1;
10479 DECL_RESULT (decl1) = resdecl;
10481 cp_apply_type_quals_to_decl (cp_type_quals (restype), resdecl);
10484 /* Initialize RTL machinery. We cannot do this until
10485 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
10486 even when processing a template; this is how we get
10487 CFUN set up, and our per-function variables initialized.
10488 FIXME factor out the non-RTL stuff. */
10489 bl = current_binding_level;
10490 allocate_struct_function (decl1);
10491 current_binding_level = bl;
10493 /* Even though we're inside a function body, we still don't want to
10494 call expand_expr to calculate the size of a variable-sized array.
10495 We haven't necessarily assigned RTL to all variables yet, so it's
10496 not safe to try to expand expressions involving them. */
10497 cfun->x_dont_save_pending_sizes_p = 1;
10499 /* Start the statement-tree, start the tree now. */
10500 DECL_SAVED_TREE (decl1) = push_stmt_list ();
10502 /* Let the user know we're compiling this function. */
10503 announce_function (decl1);
10505 /* Record the decl so that the function name is defined.
10506 If we already have a decl for this name, and it is a FUNCTION_DECL,
10507 use the old decl. */
10508 if (!processing_template_decl && !(flags & SF_PRE_PARSED))
10510 /* A specialization is not used to guide overload resolution. */
10511 if (!DECL_FUNCTION_MEMBER_P (decl1)
10512 && !(DECL_USE_TEMPLATE (decl1) &&
10513 PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl1))))
10515 tree olddecl = pushdecl (decl1);
10517 if (olddecl == error_mark_node)
10518 /* If something went wrong when registering the declaration,
10519 use DECL1; we have to have a FUNCTION_DECL to use when
10520 parsing the body of the function. */
10523 /* Otherwise, OLDDECL is either a previous declaration of
10524 the same function or DECL1 itself. */
10529 /* We need to set the DECL_CONTEXT. */
10530 if (!DECL_CONTEXT (decl1) && DECL_TEMPLATE_INFO (decl1))
10531 DECL_CONTEXT (decl1) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1));
10533 fntype = TREE_TYPE (decl1);
10535 /* If #pragma weak applies, mark the decl appropriately now.
10536 The pragma only applies to global functions. Because
10537 determining whether or not the #pragma applies involves
10538 computing the mangled name for the declaration, we cannot
10539 apply the pragma until after we have merged this declaration
10540 with any previous declarations; if the original declaration
10541 has a linkage specification, that specification applies to
10542 the definition as well, and may affect the mangled name. */
10543 if (!DECL_CONTEXT (decl1))
10544 maybe_apply_pragma_weak (decl1);
10547 /* Reset these in case the call to pushdecl changed them. */
10548 current_function_decl = decl1;
10549 cfun->decl = decl1;
10551 /* If we are (erroneously) defining a function that we have already
10552 defined before, wipe out what we knew before. */
10553 if (!DECL_PENDING_INLINE_P (decl1))
10554 DECL_SAVED_FUNCTION_DATA (decl1) = NULL;
10556 if (ctype && !doing_friend && !DECL_STATIC_FUNCTION_P (decl1))
10558 /* We know that this was set up by `grokclassfn'. We do not
10559 wait until `store_parm_decls', since evil parse errors may
10560 never get us to that point. Here we keep the consistency
10561 between `current_class_type' and `current_class_ptr'. */
10562 tree t = DECL_ARGUMENTS (decl1);
10564 gcc_assert (t != NULL_TREE && TREE_CODE (t) == PARM_DECL);
10565 gcc_assert (TREE_CODE (TREE_TYPE (t)) == POINTER_TYPE);
10567 cp_function_chain->x_current_class_ref
10568 = build_indirect_ref (t, NULL);
10569 cp_function_chain->x_current_class_ptr = t;
10571 /* Constructors and destructors need to know whether they're "in
10572 charge" of initializing virtual base classes. */
10573 t = TREE_CHAIN (t);
10574 if (DECL_HAS_IN_CHARGE_PARM_P (decl1))
10576 current_in_charge_parm = t;
10577 t = TREE_CHAIN (t);
10579 if (DECL_HAS_VTT_PARM_P (decl1))
10581 gcc_assert (DECL_NAME (t) == vtt_parm_identifier);
10582 current_vtt_parm = t;
10586 honor_interface = (!DECL_TEMPLATE_INSTANTIATION (decl1)
10587 /* Implicitly-defined methods (like the
10588 destructor for a class in which no destructor
10589 is explicitly declared) must not be defined
10590 until their definition is needed. So, we
10591 ignore interface specifications for
10592 compiler-generated functions. */
10593 && !DECL_ARTIFICIAL (decl1));
10595 if (DECL_INTERFACE_KNOWN (decl1))
10597 tree ctx = decl_function_context (decl1);
10599 if (DECL_NOT_REALLY_EXTERN (decl1))
10600 DECL_EXTERNAL (decl1) = 0;
10602 if (ctx != NULL_TREE && DECL_DECLARED_INLINE_P (ctx)
10603 && TREE_PUBLIC (ctx))
10604 /* This is a function in a local class in an extern inline
10606 comdat_linkage (decl1);
10608 /* If this function belongs to an interface, it is public.
10609 If it belongs to someone else's interface, it is also external.
10610 This only affects inlines and template instantiations. */
10611 else if (!finfo->interface_unknown && honor_interface)
10613 if (DECL_DECLARED_INLINE_P (decl1)
10614 || DECL_TEMPLATE_INSTANTIATION (decl1)
10615 || processing_template_decl)
10617 DECL_EXTERNAL (decl1)
10618 = (finfo->interface_only
10619 || (DECL_DECLARED_INLINE_P (decl1)
10620 && ! flag_implement_inlines
10621 && !DECL_VINDEX (decl1)));
10623 /* For WIN32 we also want to put these in linkonce sections. */
10624 maybe_make_one_only (decl1);
10627 DECL_EXTERNAL (decl1) = 0;
10628 DECL_INTERFACE_KNOWN (decl1) = 1;
10629 /* If this function is in an interface implemented in this file,
10630 make sure that the backend knows to emit this function
10632 if (!DECL_EXTERNAL (decl1))
10633 mark_needed (decl1);
10635 else if (finfo->interface_unknown && finfo->interface_only
10636 && honor_interface)
10638 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
10639 interface, we will have both finfo->interface_unknown and
10640 finfo->interface_only set. In that case, we don't want to
10641 use the normal heuristics because someone will supply a
10642 #pragma implementation elsewhere, and deducing it here would
10643 produce a conflict. */
10644 comdat_linkage (decl1);
10645 DECL_EXTERNAL (decl1) = 0;
10646 DECL_INTERFACE_KNOWN (decl1) = 1;
10647 DECL_DEFER_OUTPUT (decl1) = 1;
10651 /* This is a definition, not a reference.
10652 So clear DECL_EXTERNAL. */
10653 DECL_EXTERNAL (decl1) = 0;
10655 if ((DECL_DECLARED_INLINE_P (decl1)
10656 || DECL_TEMPLATE_INSTANTIATION (decl1))
10657 && ! DECL_INTERFACE_KNOWN (decl1)
10658 /* Don't try to defer nested functions for now. */
10659 && ! decl_function_context (decl1))
10660 DECL_DEFER_OUTPUT (decl1) = 1;
10662 DECL_INTERFACE_KNOWN (decl1) = 1;
10665 /* Determine the ELF visibility attribute for the function. We must not
10666 do this before calling "pushdecl", as we must allow "duplicate_decls"
10667 to merge any attributes appropriately. We also need to wait until
10669 if (!DECL_CLONED_FUNCTION_P (decl1))
10670 determine_visibility (decl1);
10672 begin_scope (sk_function_parms, decl1);
10676 if (DECL_DESTRUCTOR_P (decl1)
10677 || (DECL_CONSTRUCTOR_P (decl1)
10678 && targetm.cxx.cdtor_returns_this ()))
10680 cdtor_label = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
10681 DECL_CONTEXT (cdtor_label) = current_function_decl;
10684 start_fname_decls ();
10686 store_parm_decls (current_function_parms);
10690 /* Like start_preparsed_function, except that instead of a
10691 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
10693 Returns 1 on success. If the DECLARATOR is not suitable for a function
10694 (it defines a datum instead), we return 0, which tells
10695 yyparse to report a parse error. */
10698 start_function (cp_decl_specifier_seq *declspecs,
10699 const cp_declarator *declarator,
10704 decl1 = grokdeclarator (declarator, declspecs, FUNCDEF, 1, &attrs);
10705 /* If the declarator is not suitable for a function definition,
10706 cause a syntax error. */
10707 if (decl1 == NULL_TREE || TREE_CODE (decl1) != FUNCTION_DECL)
10710 if (DECL_MAIN_P (decl1))
10711 /* main must return int. grokfndecl should have corrected it
10712 (and issued a diagnostic) if the user got it wrong. */
10713 gcc_assert (same_type_p (TREE_TYPE (TREE_TYPE (decl1)),
10714 integer_type_node));
10716 start_preparsed_function (decl1, attrs, /*flags=*/SF_DEFAULT);
10721 /* Returns true iff an EH_SPEC_BLOCK should be created in the body of
10725 use_eh_spec_block (tree fn)
10727 return (flag_exceptions && flag_enforce_eh_specs
10728 && !processing_template_decl
10729 && TYPE_RAISES_EXCEPTIONS (TREE_TYPE (fn))
10730 /* We insert the EH_SPEC_BLOCK only in the original
10731 function; then, it is copied automatically to the
10733 && !DECL_CLONED_FUNCTION_P (fn)
10734 /* Implicitly-generated constructors and destructors have
10735 exception specifications. However, those specifications
10736 are the union of the possible exceptions specified by the
10737 constructors/destructors for bases and members, so no
10738 unallowed exception will ever reach this function. By
10739 not creating the EH_SPEC_BLOCK we save a little memory,
10740 and we avoid spurious warnings about unreachable
10742 && !DECL_ARTIFICIAL (fn));
10745 /* Store the parameter declarations into the current function declaration.
10746 This is called after parsing the parameter declarations, before
10747 digesting the body of the function.
10749 Also install to binding contour return value identifier, if any. */
10752 store_parm_decls (tree current_function_parms)
10754 tree fndecl = current_function_decl;
10757 /* This is a chain of any other decls that came in among the parm
10758 declarations. If a parm is declared with enum {foo, bar} x;
10759 then CONST_DECLs for foo and bar are put here. */
10760 tree nonparms = NULL_TREE;
10762 if (current_function_parms)
10764 /* This case is when the function was defined with an ANSI prototype.
10765 The parms already have decls, so we need not do anything here
10766 except record them as in effect
10767 and complain if any redundant old-style parm decls were written. */
10769 tree specparms = current_function_parms;
10772 /* Must clear this because it might contain TYPE_DECLs declared
10774 current_binding_level->names = NULL;
10776 /* If we're doing semantic analysis, then we'll call pushdecl
10777 for each of these. We must do them in reverse order so that
10778 they end in the correct forward order. */
10779 specparms = nreverse (specparms);
10781 for (parm = specparms; parm; parm = next)
10783 next = TREE_CHAIN (parm);
10784 if (TREE_CODE (parm) == PARM_DECL)
10786 if (DECL_NAME (parm) == NULL_TREE
10787 || TREE_CODE (parm) != VOID_TYPE)
10790 error ("parameter %qD declared void", parm);
10794 /* If we find an enum constant or a type tag,
10795 put it aside for the moment. */
10796 TREE_CHAIN (parm) = NULL_TREE;
10797 nonparms = chainon (nonparms, parm);
10801 /* Get the decls in their original chain order and record in the
10802 function. This is all and only the PARM_DECLs that were
10803 pushed into scope by the loop above. */
10804 DECL_ARGUMENTS (fndecl) = getdecls ();
10807 DECL_ARGUMENTS (fndecl) = NULL_TREE;
10809 /* Now store the final chain of decls for the arguments
10810 as the decl-chain of the current lexical scope.
10811 Put the enumerators in as well, at the front so that
10812 DECL_ARGUMENTS is not modified. */
10813 current_binding_level->names = chainon (nonparms, DECL_ARGUMENTS (fndecl));
10815 if (use_eh_spec_block (current_function_decl))
10816 current_eh_spec_block = begin_eh_spec_block ();
10820 /* We have finished doing semantic analysis on DECL, but have not yet
10821 generated RTL for its body. Save away our current state, so that
10822 when we want to generate RTL later we know what to do. */
10825 save_function_data (tree decl)
10827 struct language_function *f;
10829 /* Save the language-specific per-function data so that we can
10830 get it back when we really expand this function. */
10831 gcc_assert (!DECL_PENDING_INLINE_P (decl));
10834 f = GGC_NEW (struct language_function);
10835 memcpy (f, cp_function_chain, sizeof (struct language_function));
10836 DECL_SAVED_FUNCTION_DATA (decl) = f;
10838 /* Clear out the bits we don't need. */
10839 f->base.x_stmt_tree.x_cur_stmt_list = NULL_TREE;
10840 f->bindings = NULL;
10841 f->x_local_names = NULL;
10845 /* Set the return value of the constructor (if present). */
10848 finish_constructor_body (void)
10853 if (targetm.cxx.cdtor_returns_this ())
10855 /* Any return from a constructor will end up here. */
10856 add_stmt (build_stmt (LABEL_EXPR, cdtor_label));
10858 val = DECL_ARGUMENTS (current_function_decl);
10859 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
10860 DECL_RESULT (current_function_decl), val);
10861 /* Return the address of the object. */
10862 exprstmt = build_stmt (RETURN_EXPR, val);
10863 add_stmt (exprstmt);
10867 /* Do all the processing for the beginning of a destructor; set up the
10868 vtable pointers and cleanups for bases and members. */
10871 begin_destructor_body (void)
10873 tree compound_stmt;
10875 /* If the CURRENT_CLASS_TYPE is incomplete, we will have already
10876 issued an error message. We still want to try to process the
10877 body of the function, but initialize_vtbl_ptrs will crash if
10878 TYPE_BINFO is NULL. */
10879 if (COMPLETE_TYPE_P (current_class_type))
10881 compound_stmt = begin_compound_stmt (0);
10882 /* Make all virtual function table pointers in non-virtual base
10883 classes point to CURRENT_CLASS_TYPE's virtual function
10885 initialize_vtbl_ptrs (current_class_ptr);
10886 finish_compound_stmt (compound_stmt);
10888 /* And insert cleanups for our bases and members so that they
10889 will be properly destroyed if we throw. */
10890 push_base_cleanups ();
10894 /* At the end of every destructor we generate code to delete the object if
10895 necessary. Do that now. */
10898 finish_destructor_body (void)
10902 /* Any return from a destructor will end up here; that way all base
10903 and member cleanups will be run when the function returns. */
10904 add_stmt (build_stmt (LABEL_EXPR, cdtor_label));
10906 /* In a virtual destructor, we must call delete. */
10907 if (DECL_VIRTUAL_P (current_function_decl))
10910 tree virtual_size = cxx_sizeof (current_class_type);
10914 At the point of definition of a virtual destructor (including
10915 an implicit definition), non-placement operator delete shall
10916 be looked up in the scope of the destructor's class and if
10917 found shall be accessible and unambiguous. */
10918 exprstmt = build_op_delete_call(DELETE_EXPR, current_class_ptr,
10920 /*global_p=*/false,
10921 /*placement=*/NULL_TREE,
10922 /*alloc_fn=*/NULL_TREE);
10924 if_stmt = begin_if_stmt ();
10925 finish_if_stmt_cond (build2 (BIT_AND_EXPR, integer_type_node,
10926 current_in_charge_parm,
10929 finish_expr_stmt (exprstmt);
10930 finish_then_clause (if_stmt);
10931 finish_if_stmt (if_stmt);
10934 if (targetm.cxx.cdtor_returns_this ())
10938 val = DECL_ARGUMENTS (current_function_decl);
10939 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
10940 DECL_RESULT (current_function_decl), val);
10941 /* Return the address of the object. */
10942 exprstmt = build_stmt (RETURN_EXPR, val);
10943 add_stmt (exprstmt);
10947 /* Do the necessary processing for the beginning of a function body, which
10948 in this case includes member-initializers, but not the catch clauses of
10949 a function-try-block. Currently, this means opening a binding level
10950 for the member-initializers (in a ctor) and member cleanups (in a dtor). */
10953 begin_function_body (void)
10957 if (! FUNCTION_NEEDS_BODY_BLOCK (current_function_decl))
10960 if (processing_template_decl)
10961 /* Do nothing now. */;
10963 /* Always keep the BLOCK node associated with the outermost pair of
10964 curly braces of a function. These are needed for correct
10965 operation of dwarfout.c. */
10966 keep_next_level (true);
10968 stmt = begin_compound_stmt (BCS_FN_BODY);
10970 if (processing_template_decl)
10971 /* Do nothing now. */;
10972 else if (DECL_DESTRUCTOR_P (current_function_decl))
10973 begin_destructor_body ();
10978 /* Do the processing for the end of a function body. Currently, this means
10979 closing out the cleanups for fully-constructed bases and members, and in
10980 the case of the destructor, deleting the object if desired. Again, this
10981 is only meaningful for [cd]tors, since they are the only functions where
10982 there is a significant distinction between the main body and any
10983 function catch clauses. Handling, say, main() return semantics here
10984 would be wrong, as flowing off the end of a function catch clause for
10985 main() would also need to return 0. */
10988 finish_function_body (tree compstmt)
10990 if (compstmt == NULL_TREE)
10993 /* Close the block. */
10994 finish_compound_stmt (compstmt);
10996 if (processing_template_decl)
10997 /* Do nothing now. */;
10998 else if (DECL_CONSTRUCTOR_P (current_function_decl))
10999 finish_constructor_body ();
11000 else if (DECL_DESTRUCTOR_P (current_function_decl))
11001 finish_destructor_body ();
11004 /* Given a function, returns the BLOCK corresponding to the outermost level
11005 of curly braces, skipping the artificial block created for constructor
11009 outer_curly_brace_block (tree fndecl)
11011 tree block = BLOCK_SUBBLOCKS (DECL_INITIAL (fndecl));
11012 if (FUNCTION_NEEDS_BODY_BLOCK (current_function_decl))
11013 /* Skip the artificial function body block. */
11014 block = BLOCK_SUBBLOCKS (block);
11018 /* Finish up a function declaration and compile that function
11019 all the way to assembler language output. The free the storage
11020 for the function definition.
11022 FLAGS is a bitwise or of the following values:
11024 We just finished processing the body of an in-class inline
11025 function definition. (This processing will have taken place
11026 after the class definition is complete.) */
11029 finish_function (int flags)
11031 tree fndecl = current_function_decl;
11032 tree fntype, ctype = NULL_TREE;
11033 int inclass_inline = (flags & 2) != 0;
11036 /* When we get some parse errors, we can end up without a
11037 current_function_decl, so cope. */
11038 if (fndecl == NULL_TREE)
11039 return error_mark_node;
11041 if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fndecl)
11042 && DECL_VIRTUAL_P (fndecl)
11043 && !processing_template_decl)
11045 tree fnclass = DECL_CONTEXT (fndecl);
11046 if (fndecl == CLASSTYPE_KEY_METHOD (fnclass))
11047 keyed_classes = tree_cons (NULL_TREE, fnclass, keyed_classes);
11050 nested = function_depth > 1;
11051 fntype = TREE_TYPE (fndecl);
11053 /* TREE_READONLY (fndecl) = 1;
11054 This caused &foo to be of type ptr-to-const-function
11055 which then got a warning when stored in a ptr-to-function variable. */
11057 gcc_assert (building_stmt_tree ());
11059 /* For a cloned function, we've already got all the code we need;
11060 there's no need to add any extra bits. */
11061 if (!DECL_CLONED_FUNCTION_P (fndecl))
11063 if (DECL_MAIN_P (current_function_decl))
11067 /* Make it so that `main' always returns 0 by default (or
11070 stmt = finish_return_stmt (integer_one_node);
11072 stmt = finish_return_stmt (integer_zero_node);
11074 /* Hack. We don't want the middle-end to warn that this
11075 return is unreachable, so put the statement on the
11077 #ifdef USE_MAPPED_LOCATION
11078 SET_EXPR_LOCATION (stmt, UNKNOWN_LOCATION);
11080 annotate_with_file_line (stmt, input_filename, 0);
11084 if (use_eh_spec_block (current_function_decl))
11085 finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
11086 (TREE_TYPE (current_function_decl)),
11087 current_eh_spec_block);
11090 /* If we're saving up tree structure, tie off the function now. */
11091 DECL_SAVED_TREE (fndecl) = pop_stmt_list (DECL_SAVED_TREE (fndecl));
11093 finish_fname_decls ();
11095 /* If this function can't throw any exceptions, remember that. */
11096 if (!processing_template_decl
11097 && !cp_function_chain->can_throw
11098 && !flag_non_call_exceptions
11099 && targetm.binds_local_p (fndecl))
11100 TREE_NOTHROW (fndecl) = 1;
11102 /* This must come after expand_function_end because cleanups might
11103 have declarations (from inline functions) that need to go into
11104 this function's blocks. */
11106 /* If the current binding level isn't the outermost binding level
11107 for this function, either there is a bug, or we have experienced
11108 syntax errors and the statement tree is malformed. */
11109 if (current_binding_level->kind != sk_function_parms)
11111 /* Make sure we have already experienced errors. */
11112 gcc_assert (errorcount);
11114 /* Throw away the broken statement tree and extra binding
11116 DECL_SAVED_TREE (fndecl) = alloc_stmt_list ();
11118 while (current_binding_level->kind != sk_function_parms)
11120 if (current_binding_level->kind == sk_class)
11121 pop_nested_class ();
11123 poplevel (0, 0, 0);
11126 poplevel (1, 0, 1);
11128 /* Statements should always be full-expressions at the outermost set
11129 of curly braces for a function. */
11130 gcc_assert (stmts_are_full_exprs_p ());
11132 /* Set up the named return value optimization, if we can. Candidate
11133 variables are selected in check_return_value. */
11134 if (current_function_return_value)
11136 tree r = current_function_return_value;
11139 if (r != error_mark_node
11140 /* This is only worth doing for fns that return in memory--and
11141 simpler, since we don't have to worry about promoted modes. */
11142 && aggregate_value_p (TREE_TYPE (TREE_TYPE (fndecl)), fndecl)
11143 /* Only allow this for variables declared in the outer scope of
11144 the function so we know that their lifetime always ends with a
11145 return; see g++.dg/opt/nrv6.C. We could be more flexible if
11146 we were to do this optimization in tree-ssa. */
11147 && (outer = outer_curly_brace_block (fndecl))
11148 && chain_member (r, BLOCK_VARS (outer)))
11149 finalize_nrv (&DECL_SAVED_TREE (fndecl), r, DECL_RESULT (fndecl));
11151 current_function_return_value = NULL_TREE;
11154 /* Remember that we were in class scope. */
11155 if (current_class_name)
11156 ctype = current_class_type;
11158 /* Must mark the RESULT_DECL as being in this function. */
11159 DECL_CONTEXT (DECL_RESULT (fndecl)) = fndecl;
11161 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
11162 to the FUNCTION_DECL node itself. */
11163 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl)) = fndecl;
11165 /* Save away current state, if appropriate. */
11166 if (!processing_template_decl)
11167 save_function_data (fndecl);
11169 /* Complain if there's just no return statement. */
11170 if (warn_return_type
11171 && TREE_CODE (TREE_TYPE (fntype)) != VOID_TYPE
11172 && !dependent_type_p (TREE_TYPE (fntype))
11173 && !current_function_returns_value && !current_function_returns_null
11174 /* Don't complain if we abort or throw. */
11175 && !current_function_returns_abnormally
11176 && !DECL_NAME (DECL_RESULT (fndecl))
11177 /* Normally, with -Wreturn-type, flow will complain. Unless we're an
11178 inline function, as we might never be compiled separately. */
11179 && (DECL_INLINE (fndecl) || processing_template_decl)
11180 /* Structor return values (if any) are set by the compiler. */
11181 && !DECL_CONSTRUCTOR_P (fndecl)
11182 && !DECL_DESTRUCTOR_P (fndecl))
11183 warning (OPT_Wreturn_type, "no return statement in function returning non-void");
11185 /* Store the end of the function, so that we get good line number
11186 info for the epilogue. */
11187 cfun->function_end_locus = input_location;
11189 /* Genericize before inlining. */
11190 if (!processing_template_decl)
11192 struct language_function *f = DECL_SAVED_FUNCTION_DATA (fndecl);
11193 cp_genericize (fndecl);
11194 /* Clear out the bits we don't need. */
11195 f->x_current_class_ptr = NULL;
11196 f->x_current_class_ref = NULL;
11197 f->x_eh_spec_block = NULL;
11198 f->x_in_charge_parm = NULL;
11199 f->x_vtt_parm = NULL;
11200 f->x_return_value = NULL;
11201 f->bindings = NULL;
11202 f->extern_decl_map = NULL;
11204 /* Handle attribute((warn_unused_result)). Relies on gimple input. */
11205 c_warn_unused_result (&DECL_SAVED_TREE (fndecl));
11207 /* Clear out the bits we don't need. */
11208 local_names = NULL;
11210 /* We're leaving the context of this function, so zap cfun. It's still in
11211 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
11213 current_function_decl = NULL;
11215 /* If this is an in-class inline definition, we may have to pop the
11216 bindings for the template parameters that we added in
11217 maybe_begin_member_template_processing when start_function was
11219 if (inclass_inline)
11220 maybe_end_member_template_processing ();
11222 /* Leave the scope of the class. */
11224 pop_nested_class ();
11230 /* Let the error reporting routines know that we're outside a
11231 function. For a nested function, this value is used in
11232 cxx_pop_function_context and then reset via pop_function_context. */
11233 current_function_decl = NULL_TREE;
11238 /* Create the FUNCTION_DECL for a function definition.
11239 DECLSPECS and DECLARATOR are the parts of the declaration;
11240 they describe the return type and the name of the function,
11241 but twisted together in a fashion that parallels the syntax of C.
11243 This function creates a binding context for the function body
11244 as well as setting up the FUNCTION_DECL in current_function_decl.
11246 Returns a FUNCTION_DECL on success.
11248 If the DECLARATOR is not suitable for a function (it defines a datum
11249 instead), we return 0, which tells yyparse to report a parse error.
11251 May return void_type_node indicating that this method is actually
11252 a friend. See grokfield for more details.
11254 Came here with a `.pushlevel' .
11256 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
11257 CHANGES TO CODE IN `grokfield'. */
11260 start_method (cp_decl_specifier_seq *declspecs,
11261 const cp_declarator *declarator, tree attrlist)
11263 tree fndecl = grokdeclarator (declarator, declspecs, MEMFUNCDEF, 0,
11266 if (fndecl == error_mark_node)
11267 return error_mark_node;
11269 if (fndecl == NULL || TREE_CODE (fndecl) != FUNCTION_DECL)
11271 error ("invalid member function declaration");
11272 return error_mark_node;
11276 cplus_decl_attributes (&fndecl, attrlist, 0);
11278 /* Pass friends other than inline friend functions back. */
11279 if (fndecl == void_type_node)
11282 if (DECL_IN_AGGR_P (fndecl))
11284 if (DECL_CONTEXT (fndecl)
11285 && TREE_CODE (DECL_CONTEXT (fndecl)) != NAMESPACE_DECL)
11286 error ("%qD is already defined in class %qT", fndecl,
11287 DECL_CONTEXT (fndecl));
11288 return error_mark_node;
11291 check_template_shadow (fndecl);
11293 DECL_DECLARED_INLINE_P (fndecl) = 1;
11294 if (flag_default_inline)
11295 DECL_INLINE (fndecl) = 1;
11297 /* We process method specializations in finish_struct_1. */
11298 if (processing_template_decl && !DECL_TEMPLATE_SPECIALIZATION (fndecl))
11300 fndecl = push_template_decl (fndecl);
11301 if (fndecl == error_mark_node)
11305 if (! DECL_FRIEND_P (fndecl))
11307 if (TREE_CHAIN (fndecl))
11309 fndecl = copy_node (fndecl);
11310 TREE_CHAIN (fndecl) = NULL_TREE;
11314 finish_decl (fndecl, NULL_TREE, NULL_TREE);
11316 /* Make a place for the parms. */
11317 begin_scope (sk_function_parms, fndecl);
11319 DECL_IN_AGGR_P (fndecl) = 1;
11323 /* Go through the motions of finishing a function definition.
11324 We don't compile this method until after the whole class has
11327 FINISH_METHOD must return something that looks as though it
11328 came from GROKFIELD (since we are defining a method, after all).
11330 This is called after parsing the body of the function definition.
11331 STMTS is the chain of statements that makes up the function body.
11333 DECL is the ..._DECL that `start_method' provided. */
11336 finish_method (tree decl)
11338 tree fndecl = decl;
11343 if (decl == void_type_node)
11346 old_initial = DECL_INITIAL (fndecl);
11348 /* Undo the level for the parms (from start_method).
11349 This is like poplevel, but it causes nothing to be
11350 saved. Saving information here confuses symbol-table
11351 output routines. Besides, this information will
11352 be correctly output when this method is actually
11355 /* Clear out the meanings of the local variables of this level;
11356 also record in each decl which block it belongs to. */
11358 for (link = current_binding_level->names; link; link = TREE_CHAIN (link))
11360 if (DECL_NAME (link) != NULL_TREE)
11361 pop_binding (DECL_NAME (link), link);
11362 gcc_assert (TREE_CODE (link) != FUNCTION_DECL);
11363 DECL_CONTEXT (link) = NULL_TREE;
11366 poplevel (0, 0, 0);
11368 DECL_INITIAL (fndecl) = old_initial;
11370 /* We used to check if the context of FNDECL was different from
11371 current_class_type as another way to get inside here. This didn't work
11372 for String.cc in libg++. */
11373 if (DECL_FRIEND_P (fndecl))
11375 VEC_safe_push (tree, gc, CLASSTYPE_INLINE_FRIENDS (current_class_type),
11377 decl = void_type_node;
11384 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
11385 we can lay it out later, when and if its type becomes complete. */
11388 maybe_register_incomplete_var (tree var)
11390 gcc_assert (TREE_CODE (var) == VAR_DECL);
11392 /* Keep track of variables with incomplete types. */
11393 if (!processing_template_decl && TREE_TYPE (var) != error_mark_node
11394 && DECL_EXTERNAL (var))
11396 tree inner_type = TREE_TYPE (var);
11398 while (TREE_CODE (inner_type) == ARRAY_TYPE)
11399 inner_type = TREE_TYPE (inner_type);
11400 inner_type = TYPE_MAIN_VARIANT (inner_type);
11402 if ((!COMPLETE_TYPE_P (inner_type) && CLASS_TYPE_P (inner_type))
11403 /* RTTI TD entries are created while defining the type_info. */
11404 || (TYPE_LANG_SPECIFIC (inner_type)
11405 && TYPE_BEING_DEFINED (inner_type)))
11406 incomplete_vars = tree_cons (inner_type, var, incomplete_vars);
11410 /* Called when a class type (given by TYPE) is defined. If there are
11411 any existing VAR_DECLs whose type hsa been completed by this
11412 declaration, update them now. */
11415 complete_vars (tree type)
11417 tree *list = &incomplete_vars;
11419 gcc_assert (CLASS_TYPE_P (type));
11422 if (same_type_p (type, TREE_PURPOSE (*list)))
11424 tree var = TREE_VALUE (*list);
11425 tree type = TREE_TYPE (var);
11426 /* Complete the type of the variable. The VAR_DECL itself
11427 will be laid out in expand_expr. */
11428 complete_type (type);
11429 cp_apply_type_quals_to_decl (cp_type_quals (type), var);
11430 /* Remove this entry from the list. */
11431 *list = TREE_CHAIN (*list);
11434 list = &TREE_CHAIN (*list);
11437 /* Check for pending declarations which may have abstract type. */
11438 complete_type_check_abstract (type);
11441 /* If DECL is of a type which needs a cleanup, build that cleanup
11445 cxx_maybe_build_cleanup (tree decl)
11447 tree type = TREE_TYPE (decl);
11449 if (type != error_mark_node && TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
11451 int flags = LOOKUP_NORMAL|LOOKUP_DESTRUCTOR;
11453 bool has_vbases = (TREE_CODE (type) == RECORD_TYPE
11454 && CLASSTYPE_VBASECLASSES (type));
11456 if (TREE_CODE (type) == ARRAY_TYPE)
11460 cxx_mark_addressable (decl);
11461 rval = build_unary_op (ADDR_EXPR, decl, 0);
11464 /* Optimize for space over speed here. */
11465 if (!has_vbases || flag_expensive_optimizations)
11466 flags |= LOOKUP_NONVIRTUAL;
11468 rval = build_delete (TREE_TYPE (rval), rval,
11469 sfk_complete_destructor, flags, 0);
11476 /* When a stmt has been parsed, this function is called. */
11483 /* DECL was originally constructed as a non-static member function,
11484 but turned out to be static. Update it accordingly. */
11487 revert_static_member_fn (tree decl)
11490 tree function = TREE_TYPE (decl);
11491 tree args = TYPE_ARG_TYPES (function);
11493 if (cp_type_quals (TREE_TYPE (TREE_VALUE (args)))
11494 != TYPE_UNQUALIFIED)
11495 error ("static member function %q#D declared with type qualifiers", decl);
11497 args = TREE_CHAIN (args);
11498 tmp = build_function_type (TREE_TYPE (function), args);
11499 tmp = build_qualified_type (tmp, cp_type_quals (function));
11500 tmp = build_exception_variant (tmp,
11501 TYPE_RAISES_EXCEPTIONS (function));
11502 TREE_TYPE (decl) = tmp;
11503 if (DECL_ARGUMENTS (decl))
11504 DECL_ARGUMENTS (decl) = TREE_CHAIN (DECL_ARGUMENTS (decl));
11505 DECL_STATIC_FUNCTION_P (decl) = 1;
11508 /* Initialize the variables used during compilation of a C++
11512 cxx_push_function_context (struct function * f)
11514 struct language_function *p = GGC_CNEW (struct language_function);
11517 /* Whenever we start a new function, we destroy temporaries in the
11519 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
11525 if (DECL_SAVED_FUNCTION_DATA (fn))
11527 /* If we already parsed this function, and we're just expanding it
11528 now, restore saved state. */
11529 *cp_function_chain = *DECL_SAVED_FUNCTION_DATA (fn);
11531 /* We don't need the saved data anymore. Unless this is an inline
11532 function; we need the named return value info for
11533 declare_return_variable. */
11534 if (! DECL_INLINE (fn))
11535 DECL_SAVED_FUNCTION_DATA (fn) = NULL;
11540 /* Free the language-specific parts of F, now that we've finished
11541 compiling the function. */
11544 cxx_pop_function_context (struct function * f)
11549 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
11550 one of the language-independent trees. */
11552 enum cp_tree_node_structure_enum
11553 cp_tree_node_structure (union lang_tree_node * t)
11555 switch (TREE_CODE (&t->generic))
11557 case DEFAULT_ARG: return TS_CP_DEFAULT_ARG;
11558 case IDENTIFIER_NODE: return TS_CP_IDENTIFIER;
11559 case OVERLOAD: return TS_CP_OVERLOAD;
11560 case TEMPLATE_PARM_INDEX: return TS_CP_TPI;
11561 case TINST_LEVEL: return TS_CP_TINST_LEVEL;
11562 case PTRMEM_CST: return TS_CP_PTRMEM;
11563 case BASELINK: return TS_CP_BASELINK;
11564 default: return TS_CP_GENERIC;
11568 /* Build the void_list_node (void_type_node having been created). */
11570 build_void_list_node (void)
11572 tree t = build_tree_list (NULL_TREE, void_type_node);
11577 cp_missing_noreturn_ok_p (tree decl)
11579 /* A missing noreturn is ok for the `main' function. */
11580 return DECL_MAIN_P (decl);
11583 /* Return the COMDAT group into which DECL should be placed. */
11586 cxx_comdat_group (tree decl)
11590 /* Virtual tables, construction virtual tables, and virtual table
11591 tables all go in a single COMDAT group, named after the primary
11593 if (TREE_CODE (decl) == VAR_DECL && DECL_VTABLE_OR_VTT_P (decl))
11594 name = DECL_ASSEMBLER_NAME (CLASSTYPE_VTABLES (DECL_CONTEXT (decl)));
11595 /* For all other DECLs, the COMDAT group is the mangled name of the
11596 declaration itself. */
11599 while (DECL_THUNK_P (decl))
11601 /* If TARGET_USE_LOCAL_THUNK_ALIAS_P, use_thunk puts the thunk
11602 into the same section as the target function. In that case
11603 we must return target's name. */
11604 tree target = THUNK_TARGET (decl);
11605 if (TARGET_USE_LOCAL_THUNK_ALIAS_P (target)
11606 && DECL_SECTION_NAME (target) != NULL
11607 && DECL_ONE_ONLY (target))
11612 name = DECL_ASSEMBLER_NAME (decl);
11615 return IDENTIFIER_POINTER (name);
11618 #include "gt-cp-decl.h"