1 /* Process declarations and variables for C++ compiler.
2 Copyright (C) 1988, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
3 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011
4 Free Software Foundation, Inc.
5 Contributed by Michael Tiemann (tiemann@cygnus.com)
7 This file is part of GCC.
9 GCC is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3, or (at your option)
14 GCC is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with GCC; see the file COPYING3. If not see
21 <http://www.gnu.org/licenses/>. */
24 /* Process declarations and symbol lookup for C++ front end.
25 Also constructs types; the standard scalar types at initialization,
26 and structure, union, array and enum types when they are declared. */
28 /* ??? not all decl nodes are given the most useful possible
29 line numbers. For example, the CONST_DECLs for enum values. */
33 #include "coretypes.h"
38 #include "tree-iterator.h"
39 #include "tree-inline.h"
47 #include "c-family/c-common.h"
48 #include "c-family/c-objc.h"
49 #include "c-family/c-pragma.h"
50 #include "diagnostic.h"
54 #include "pointer-set.h"
55 #include "splay-tree.h"
58 /* Possible cases of bad specifiers type used by bad_specifiers. */
60 BSP_VAR, /* variable */
61 BSP_PARM, /* parameter */
66 static tree grokparms (tree parmlist, tree *);
67 static const char *redeclaration_error_message (tree, tree);
69 static int decl_jump_unsafe (tree);
70 static void require_complete_types_for_parms (tree);
71 static int ambi_op_p (enum tree_code);
72 static int unary_op_p (enum tree_code);
73 static void push_local_name (tree);
74 static tree grok_reference_init (tree, tree, tree, tree *);
75 static tree grokvardecl (tree, tree, const cp_decl_specifier_seq *,
77 static void record_unknown_type (tree, const char *);
78 static tree builtin_function_1 (tree, tree, bool);
79 static tree build_library_fn_1 (tree, enum tree_code, tree);
80 static int member_function_or_else (tree, tree, enum overload_flags);
81 static void bad_specifiers (tree, enum bad_spec_place, int, int, int, int,
83 static void check_for_uninitialized_const_var (tree);
84 static hashval_t typename_hash (const void *);
85 static int typename_compare (const void *, const void *);
86 static tree local_variable_p_walkfn (tree *, int *, void *);
87 static tree record_builtin_java_type (const char *, int);
88 static const char *tag_name (enum tag_types);
89 static tree lookup_and_check_tag (enum tag_types, tree, tag_scope, bool);
90 static int walk_namespaces_r (tree, walk_namespaces_fn, void *);
91 static void maybe_deduce_size_from_array_init (tree, tree);
92 static void layout_var_decl (tree);
93 static tree check_initializer (tree, tree, int, tree *);
94 static void make_rtl_for_nonlocal_decl (tree, tree, const char *);
95 static void save_function_data (tree);
96 static void copy_type_enum (tree , tree);
97 static void check_function_type (tree, tree);
98 static void finish_constructor_body (void);
99 static void begin_destructor_body (void);
100 static void finish_destructor_body (void);
101 static void record_key_method_defined (tree);
102 static tree create_array_type_for_decl (tree, tree, tree);
103 static tree get_atexit_node (void);
104 static tree get_dso_handle_node (void);
105 static tree start_cleanup_fn (void);
106 static void end_cleanup_fn (void);
107 static tree cp_make_fname_decl (location_t, tree, int);
108 static void initialize_predefined_identifiers (void);
109 static tree check_special_function_return_type
110 (special_function_kind, tree, tree);
111 static tree push_cp_library_fn (enum tree_code, tree);
112 static tree build_cp_library_fn (tree, enum tree_code, tree);
113 static void store_parm_decls (tree);
114 static void initialize_local_var (tree, tree);
115 static void expand_static_init (tree, tree);
117 /* The following symbols are subsumed in the cp_global_trees array, and
118 listed here individually for documentation purposes.
121 tree wchar_decl_node;
123 tree vtable_entry_type;
124 tree delta_type_node;
125 tree __t_desc_type_node;
127 tree class_type_node;
128 tree unknown_type_node;
130 Array type `vtable_entry_type[]'
133 tree vtbl_ptr_type_node;
140 A FUNCTION_DECL which can call `abort'. Not necessarily the
141 one that the user will declare, but sufficient to be called
142 by routines that want to abort the program.
146 The FUNCTION_DECL for the default `::operator delete'.
148 tree global_delete_fndecl;
151 tree type_info_type_node, tinfo_decl_id, tinfo_decl_type;
152 tree tinfo_var_id; */
154 tree cp_global_trees[CPTI_MAX];
156 /* Indicates that there is a type value in some namespace, although
157 that is not necessarily in scope at the moment. */
159 tree global_type_node;
161 /* The node that holds the "name" of the global scope. */
162 tree global_scope_name;
164 #define local_names cp_function_chain->x_local_names
166 /* A list of objects which have constructors or destructors
167 which reside in the global scope. The decl is stored in
168 the TREE_VALUE slot and the initializer is stored
169 in the TREE_PURPOSE slot. */
170 tree static_aggregates;
174 /* A node for the integer constant 2. */
176 tree integer_two_node;
178 /* Used only for jumps to as-yet undefined labels, since jumps to
179 defined labels can have their validity checked immediately. */
181 struct GTY((chain_next ("%h.next"))) named_label_use_entry {
182 struct named_label_use_entry *next;
183 /* The binding level to which this entry is *currently* attached.
184 This is initially the binding level in which the goto appeared,
185 but is modified as scopes are closed. */
186 struct cp_binding_level *binding_level;
187 /* The head of the names list that was current when the goto appeared,
188 or the inner scope popped. These are the decls that will *not* be
189 skipped when jumping to the label. */
191 /* The location of the goto, for error reporting. */
192 location_t o_goto_locus;
193 /* True if an OpenMP structured block scope has been closed since
194 the goto appeared. This means that the branch from the label will
195 illegally exit an OpenMP scope. */
199 /* A list of all LABEL_DECLs in the function that have names. Here so
200 we can clear out their names' definitions at the end of the
201 function, and so we can check the validity of jumps to these labels. */
203 struct GTY(()) named_label_entry {
204 /* The decl itself. */
207 /* The binding level to which the label is *currently* attached.
208 This is initially set to the binding level in which the label
209 is defined, but is modified as scopes are closed. */
210 struct cp_binding_level *binding_level;
211 /* The head of the names list that was current when the label was
212 defined, or the inner scope popped. These are the decls that will
213 be skipped when jumping to the label. */
215 /* A vector of all decls from all binding levels that would be
216 crossed by a backward branch to the label. */
217 VEC(tree,gc) *bad_decls;
219 /* A list of uses of the label, before the label is defined. */
220 struct named_label_use_entry *uses;
222 /* The following bits are set after the label is defined, and are
223 updated as scopes are popped. They indicate that a backward jump
224 to the label will illegally enter a scope of the given flavor. */
230 #define named_labels cp_function_chain->x_named_labels
232 /* The number of function bodies which we are currently processing.
233 (Zero if we are at namespace scope, one inside the body of a
234 function, two inside the body of a function in a local class, etc.) */
237 /* To avoid unwanted recursion, finish_function defers all mark_used calls
238 encountered during its execution until it finishes. */
239 bool defer_mark_used_calls;
240 VEC(tree, gc) *deferred_mark_used_calls;
242 /* States indicating how grokdeclarator() should handle declspecs marked
243 with __attribute__((deprecated)). An object declared as
244 __attribute__((deprecated)) suppresses warnings of uses of other
246 enum deprecated_states deprecated_state = DEPRECATED_NORMAL;
249 /* A list of VAR_DECLs whose type was incomplete at the time the
250 variable was declared. */
252 typedef struct GTY(()) incomplete_var_d {
254 tree incomplete_type;
257 DEF_VEC_O(incomplete_var);
258 DEF_VEC_ALLOC_O(incomplete_var,gc);
260 static GTY(()) VEC(incomplete_var,gc) *incomplete_vars;
262 /* Returns the kind of template specialization we are currently
263 processing, given that it's declaration contained N_CLASS_SCOPES
264 explicit scope qualifications. */
267 current_tmpl_spec_kind (int n_class_scopes)
269 int n_template_parm_scopes = 0;
270 int seen_specialization_p = 0;
271 int innermost_specialization_p = 0;
272 struct cp_binding_level *b;
274 /* Scan through the template parameter scopes. */
275 for (b = current_binding_level;
276 b->kind == sk_template_parms;
279 /* If we see a specialization scope inside a parameter scope,
280 then something is wrong. That corresponds to a declaration
283 template <class T> template <> ...
285 which is always invalid since [temp.expl.spec] forbids the
286 specialization of a class member template if the enclosing
287 class templates are not explicitly specialized as well. */
288 if (b->explicit_spec_p)
290 if (n_template_parm_scopes == 0)
291 innermost_specialization_p = 1;
293 seen_specialization_p = 1;
295 else if (seen_specialization_p == 1)
296 return tsk_invalid_member_spec;
298 ++n_template_parm_scopes;
301 /* Handle explicit instantiations. */
302 if (processing_explicit_instantiation)
304 if (n_template_parm_scopes != 0)
305 /* We've seen a template parameter list during an explicit
306 instantiation. For example:
308 template <class T> template void f(int);
310 This is erroneous. */
311 return tsk_invalid_expl_inst;
313 return tsk_expl_inst;
316 if (n_template_parm_scopes < n_class_scopes)
317 /* We've not seen enough template headers to match all the
318 specialized classes present. For example:
320 template <class T> void R<T>::S<T>::f(int);
322 This is invalid; there needs to be one set of template
323 parameters for each class. */
324 return tsk_insufficient_parms;
325 else if (n_template_parm_scopes == n_class_scopes)
326 /* We're processing a non-template declaration (even though it may
327 be a member of a template class.) For example:
329 template <class T> void S<T>::f(int);
331 The `class T' matches the `S<T>', leaving no template headers
332 corresponding to the `f'. */
334 else if (n_template_parm_scopes > n_class_scopes + 1)
335 /* We've got too many template headers. For example:
337 template <> template <class T> void f (T);
339 There need to be more enclosing classes. */
340 return tsk_excessive_parms;
342 /* This must be a template. It's of the form:
344 template <class T> template <class U> void S<T>::f(U);
346 This is a specialization if the innermost level was a
347 specialization; otherwise it's just a definition of the
349 return innermost_specialization_p ? tsk_expl_spec : tsk_template;
352 /* Exit the current scope. */
360 /* When a label goes out of scope, check to see if that label was used
361 in a valid manner, and issue any appropriate warnings or errors. */
364 pop_label (tree label, tree old_value)
366 if (!processing_template_decl)
368 if (DECL_INITIAL (label) == NULL_TREE)
372 error ("label %q+D used but not defined", label);
373 location = input_location; /* FIXME want (input_filename, (line)0) */
374 /* Avoid crashing later. */
375 define_label (location, DECL_NAME (label));
378 warn_for_unused_label (label);
381 SET_IDENTIFIER_LABEL_VALUE (DECL_NAME (label), old_value);
384 /* At the end of a function, all labels declared within the function
385 go out of scope. BLOCK is the top-level block for the
389 pop_labels_1 (void **slot, void *data)
391 struct named_label_entry *ent = (struct named_label_entry *) *slot;
392 tree block = (tree) data;
394 pop_label (ent->label_decl, NULL_TREE);
396 /* Put the labels into the "variables" of the top-level block,
397 so debugger can see them. */
398 DECL_CHAIN (ent->label_decl) = BLOCK_VARS (block);
399 BLOCK_VARS (block) = ent->label_decl;
401 htab_clear_slot (named_labels, slot);
407 pop_labels (tree block)
411 htab_traverse (named_labels, pop_labels_1, block);
416 /* At the end of a block with local labels, restore the outer definition. */
419 pop_local_label (tree label, tree old_value)
421 struct named_label_entry dummy;
424 pop_label (label, old_value);
426 dummy.label_decl = label;
427 slot = htab_find_slot (named_labels, &dummy, NO_INSERT);
428 htab_clear_slot (named_labels, slot);
431 /* The following two routines are used to interface to Objective-C++.
432 The binding level is purposely treated as an opaque type. */
435 objc_get_current_scope (void)
437 return current_binding_level;
440 /* The following routine is used by the NeXT-style SJLJ exceptions;
441 variables get marked 'volatile' so as to not be clobbered by
442 _setjmp()/_longjmp() calls. All variables in the current scope,
443 as well as parent scopes up to (but not including) ENCLOSING_BLK
444 shall be thusly marked. */
447 objc_mark_locals_volatile (void *enclosing_blk)
449 struct cp_binding_level *scope;
451 for (scope = current_binding_level;
452 scope && scope != enclosing_blk;
453 scope = scope->level_chain)
457 for (decl = scope->names; decl; decl = TREE_CHAIN (decl))
458 objc_volatilize_decl (decl);
460 /* Do not climb up past the current function. */
461 if (scope->kind == sk_function_parms)
466 /* Update data for defined and undefined labels when leaving a scope. */
469 poplevel_named_label_1 (void **slot, void *data)
471 struct named_label_entry *ent = (struct named_label_entry *) *slot;
472 struct cp_binding_level *bl = (struct cp_binding_level *) data;
473 struct cp_binding_level *obl = bl->level_chain;
475 if (ent->binding_level == bl)
479 /* ENT->NAMES_IN_SCOPE may contain a mixture of DECLs and
480 TREE_LISTs representing OVERLOADs, so be careful. */
481 for (decl = ent->names_in_scope; decl; decl = (DECL_P (decl)
483 : TREE_CHAIN (decl)))
484 if (decl_jump_unsafe (decl))
485 VEC_safe_push (tree, gc, ent->bad_decls, decl);
487 ent->binding_level = obl;
488 ent->names_in_scope = obl->names;
492 ent->in_try_scope = true;
495 ent->in_catch_scope = true;
498 ent->in_omp_scope = true;
506 struct named_label_use_entry *use;
508 for (use = ent->uses; use ; use = use->next)
509 if (use->binding_level == bl)
511 use->binding_level = obl;
512 use->names_in_scope = obl->names;
513 if (bl->kind == sk_omp)
514 use->in_omp_scope = true;
521 /* Saved errorcount to avoid -Wunused-but-set-{parameter,variable} warnings
522 when errors were reported, except for -Werror-unused-but-set-*. */
523 static int unused_but_set_errorcount;
525 /* Exit a binding level.
526 Pop the level off, and restore the state of the identifier-decl mappings
527 that were in effect when this level was entered.
529 If KEEP == 1, this level had explicit declarations, so
530 and create a "block" (a BLOCK node) for the level
531 to record its declarations and subblocks for symbol table output.
533 If FUNCTIONBODY is nonzero, this level is the body of a function,
534 so create a block as if KEEP were set and also clear out all
537 If REVERSE is nonzero, reverse the order of decls before putting
538 them into the BLOCK. */
541 poplevel (int keep, int reverse, int functionbody)
544 /* The chain of decls was accumulated in reverse order.
545 Put it into forward order, just for cleanliness. */
550 int leaving_for_scope;
553 cp_label_binding *label_bind;
555 timevar_start (TV_NAME_LOOKUP);
560 gcc_assert (current_binding_level->kind != sk_class);
562 if (current_binding_level->kind == sk_cleanup)
564 subblocks = functionbody >= 0 ? current_binding_level->blocks : 0;
566 gcc_assert (!VEC_length(cp_class_binding,
567 current_binding_level->class_shadowed));
569 /* We used to use KEEP == 2 to indicate that the new block should go
570 at the beginning of the list of blocks at this binding level,
571 rather than the end. This hack is no longer used. */
572 gcc_assert (keep == 0 || keep == 1);
574 if (current_binding_level->keep)
577 /* Any uses of undefined labels, and any defined labels, now operate
578 under constraints of next binding contour. */
579 if (cfun && !functionbody && named_labels)
580 htab_traverse (named_labels, poplevel_named_label_1,
581 current_binding_level);
583 /* Get the decls in the order they were written.
584 Usually current_binding_level->names is in reverse order.
585 But parameter decls were previously put in forward order. */
588 current_binding_level->names
589 = decls = nreverse (current_binding_level->names);
591 decls = current_binding_level->names;
593 /* If there were any declarations or structure tags in that level,
594 or if this level is a function body,
595 create a BLOCK to record them for the life of this function. */
597 if (keep == 1 || functionbody)
598 block = make_node (BLOCK);
599 if (block != NULL_TREE)
601 BLOCK_VARS (block) = decls;
602 BLOCK_SUBBLOCKS (block) = subblocks;
605 /* In each subblock, record that this is its superior. */
607 for (link = subblocks; link; link = BLOCK_CHAIN (link))
608 BLOCK_SUPERCONTEXT (link) = block;
610 /* We still support the old for-scope rules, whereby the variables
611 in a for-init statement were in scope after the for-statement
612 ended. We only use the new rules if flag_new_for_scope is
615 = current_binding_level->kind == sk_for && flag_new_for_scope == 1;
617 /* Before we remove the declarations first check for unused variables. */
618 if ((warn_unused_variable || warn_unused_but_set_variable)
619 && !processing_template_decl)
620 for (decl = getdecls (); decl; decl = TREE_CHAIN (decl))
621 if (TREE_CODE (decl) == VAR_DECL
622 && (! TREE_USED (decl) || !DECL_READ_P (decl))
623 && ! DECL_IN_SYSTEM_HEADER (decl)
624 && DECL_NAME (decl) && ! DECL_ARTIFICIAL (decl))
626 if (! TREE_USED (decl))
627 warning (OPT_Wunused_variable, "unused variable %q+D", decl);
628 else if (DECL_CONTEXT (decl) == current_function_decl
629 && TREE_TYPE (decl) != error_mark_node
630 && TREE_CODE (TREE_TYPE (decl)) != REFERENCE_TYPE
631 && errorcount == unused_but_set_errorcount
632 && (!CLASS_TYPE_P (TREE_TYPE (decl))
633 || !TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl))))
635 warning (OPT_Wunused_but_set_variable,
636 "variable %q+D set but not used", decl);
637 unused_but_set_errorcount = errorcount;
641 /* Remove declarations for all the DECLs in this level. */
642 for (link = decls; link; link = TREE_CHAIN (link))
644 if (leaving_for_scope && TREE_CODE (link) == VAR_DECL
647 tree name = DECL_NAME (link);
651 ob = outer_binding (name,
652 IDENTIFIER_BINDING (name),
655 ns_binding = IDENTIFIER_NAMESPACE_VALUE (name);
657 ns_binding = NULL_TREE;
659 if (ob && ob->scope == current_binding_level->level_chain)
660 /* We have something like:
665 and we are leaving the `for' scope. There's no reason to
666 keep the binding of the inner `i' in this case. */
667 pop_binding (name, link);
668 else if ((ob && (TREE_CODE (ob->value) == TYPE_DECL))
669 || (ns_binding && TREE_CODE (ns_binding) == TYPE_DECL))
670 /* Here, we have something like:
678 We must pop the for-scope binding so we know what's a
679 type and what isn't. */
680 pop_binding (name, link);
683 /* Mark this VAR_DECL as dead so that we can tell we left it
684 there only for backward compatibility. */
685 DECL_DEAD_FOR_LOCAL (link) = 1;
687 /* Keep track of what should have happened when we
688 popped the binding. */
691 SET_DECL_SHADOWED_FOR_VAR (link, ob->value);
692 DECL_HAS_SHADOWED_FOR_VAR_P (link) = 1;
695 /* Add it to the list of dead variables in the next
696 outermost binding to that we can remove these when we
697 leave that binding. */
698 VEC_safe_push (tree, gc,
699 current_binding_level->level_chain->dead_vars_from_for,
702 /* Although we don't pop the cxx_binding, we do clear
703 its SCOPE since the scope is going away now. */
704 IDENTIFIER_BINDING (name)->scope
705 = current_binding_level->level_chain;
712 /* Remove the binding. */
715 if (TREE_CODE (decl) == TREE_LIST)
716 decl = TREE_VALUE (decl);
719 if (TREE_CODE (name) == OVERLOAD)
720 name = OVL_FUNCTION (name);
722 gcc_assert (DECL_P (name));
723 pop_binding (DECL_NAME (name), decl);
727 /* Remove declarations for any `for' variables from inner scopes
728 that we kept around. */
729 FOR_EACH_VEC_ELT_REVERSE (tree, current_binding_level->dead_vars_from_for,
731 pop_binding (DECL_NAME (decl), decl);
733 /* Restore the IDENTIFIER_TYPE_VALUEs. */
734 for (link = current_binding_level->type_shadowed;
735 link; link = TREE_CHAIN (link))
736 SET_IDENTIFIER_TYPE_VALUE (TREE_PURPOSE (link), TREE_VALUE (link));
738 /* Restore the IDENTIFIER_LABEL_VALUEs for local labels. */
739 FOR_EACH_VEC_ELT_REVERSE (cp_label_binding,
740 current_binding_level->shadowed_labels,
742 pop_local_label (label_bind->label, label_bind->prev_value);
744 /* There may be OVERLOADs (wrapped in TREE_LISTs) on the BLOCK_VARs
745 list if a `using' declaration put them there. The debugging
746 back ends won't understand OVERLOAD, so we remove them here.
747 Because the BLOCK_VARS are (temporarily) shared with
748 CURRENT_BINDING_LEVEL->NAMES we must do this fixup after we have
749 popped all the bindings. */
754 for (d = &BLOCK_VARS (block); *d; )
756 if (TREE_CODE (*d) == TREE_LIST)
757 *d = TREE_CHAIN (*d);
759 d = &DECL_CHAIN (*d);
763 /* If the level being exited is the top level of a function,
764 check over all the labels. */
767 /* Since this is the top level block of a function, the vars are
768 the function's parameters. Don't leave them in the BLOCK
769 because they are found in the FUNCTION_DECL instead. */
770 BLOCK_VARS (block) = 0;
774 kind = current_binding_level->kind;
775 if (kind == sk_cleanup)
779 /* If this is a temporary binding created for a cleanup, then we'll
780 have pushed a statement list level. Pop that, create a new
781 BIND_EXPR for the block, and insert it into the stream. */
782 stmt = pop_stmt_list (current_binding_level->statement_list);
783 stmt = c_build_bind_expr (input_location, block, stmt);
790 /* The current function is being defined, so its DECL_INITIAL
791 should be error_mark_node. */
792 gcc_assert (DECL_INITIAL (current_function_decl) == error_mark_node);
793 DECL_INITIAL (current_function_decl) = block;
796 current_binding_level->blocks
797 = block_chainon (current_binding_level->blocks, block);
799 /* If we did not make a block for the level just exited,
800 any blocks made for inner levels
801 (since they cannot be recorded as subblocks in that level)
802 must be carried forward so they will later become subblocks
803 of something else. */
805 current_binding_level->blocks
806 = block_chainon (current_binding_level->blocks, subblocks);
808 /* Each and every BLOCK node created here in `poplevel' is important
809 (e.g. for proper debugging information) so if we created one
810 earlier, mark it as "used". */
812 TREE_USED (block) = 1;
814 /* All temporary bindings created for cleanups are popped silently. */
815 if (kind == sk_cleanup)
818 timevar_stop (TV_NAME_LOOKUP);
822 /* Walk all the namespaces contained NAMESPACE, including NAMESPACE
823 itself, calling F for each. The DATA is passed to F as well. */
826 walk_namespaces_r (tree name_space, walk_namespaces_fn f, void* data)
829 tree current = NAMESPACE_LEVEL (name_space)->namespaces;
831 result |= (*f) (name_space, data);
833 for (; current; current = DECL_CHAIN (current))
834 result |= walk_namespaces_r (current, f, data);
839 /* Walk all the namespaces, calling F for each. The DATA is passed to
843 walk_namespaces (walk_namespaces_fn f, void* data)
845 return walk_namespaces_r (global_namespace, f, data);
848 /* Call wrapup_globals_declarations for the globals in NAMESPACE. If
849 DATA is non-NULL, this is the last time we will call
850 wrapup_global_declarations for this NAMESPACE. */
853 wrapup_globals_for_namespace (tree name_space, void* data)
855 struct cp_binding_level *level = NAMESPACE_LEVEL (name_space);
856 VEC(tree,gc) *statics = level->static_decls;
857 tree *vec = VEC_address (tree, statics);
858 int len = VEC_length (tree, statics);
859 int last_time = (data != 0);
863 check_global_declarations (vec, len);
864 emit_debug_global_declarations (vec, len);
868 /* Write out any globals that need to be output. */
869 return wrapup_global_declarations (vec, len);
873 /* In C++, you don't have to write `struct S' to refer to `S'; you
874 can just use `S'. We accomplish this by creating a TYPE_DECL as
875 if the user had written `typedef struct S S'. Create and return
876 the TYPE_DECL for TYPE. */
879 create_implicit_typedef (tree name, tree type)
883 decl = build_decl (input_location, TYPE_DECL, name, type);
884 DECL_ARTIFICIAL (decl) = 1;
885 /* There are other implicit type declarations, like the one *within*
886 a class that allows you to write `S::S'. We must distinguish
888 SET_DECL_IMPLICIT_TYPEDEF_P (decl);
889 TYPE_NAME (type) = decl;
890 TYPE_STUB_DECL (type) = decl;
895 /* Remember a local name for name-mangling purposes. */
898 push_local_name (tree decl)
903 timevar_start (TV_NAME_LOOKUP);
905 name = DECL_NAME (decl);
907 nelts = VEC_length (tree, local_names);
908 for (i = 0; i < nelts; i++)
910 t = VEC_index (tree, local_names, i);
911 if (DECL_NAME (t) == name)
913 if (!DECL_LANG_SPECIFIC (decl))
914 retrofit_lang_decl (decl);
915 DECL_LANG_SPECIFIC (decl)->u.base.u2sel = 1;
916 if (DECL_LANG_SPECIFIC (t))
917 DECL_DISCRIMINATOR (decl) = DECL_DISCRIMINATOR (t) + 1;
919 DECL_DISCRIMINATOR (decl) = 1;
921 VEC_replace (tree, local_names, i, decl);
922 timevar_stop (TV_NAME_LOOKUP);
927 VEC_safe_push (tree, gc, local_names, decl);
928 timevar_stop (TV_NAME_LOOKUP);
931 /* Subroutine of duplicate_decls: return truthvalue of whether
932 or not types of these decls match.
934 For C++, we must compare the parameter list so that `int' can match
935 `int&' in a parameter position, but `int&' is not confused with
939 decls_match (tree newdecl, tree olddecl)
943 if (newdecl == olddecl)
946 if (TREE_CODE (newdecl) != TREE_CODE (olddecl))
947 /* If the two DECLs are not even the same kind of thing, we're not
948 interested in their types. */
951 if (TREE_CODE (newdecl) == FUNCTION_DECL)
953 tree f1 = TREE_TYPE (newdecl);
954 tree f2 = TREE_TYPE (olddecl);
955 tree p1 = TYPE_ARG_TYPES (f1);
956 tree p2 = TYPE_ARG_TYPES (f2);
958 /* Specializations of different templates are different functions
959 even if they have the same type. */
960 tree t1 = (DECL_USE_TEMPLATE (newdecl)
961 ? DECL_TI_TEMPLATE (newdecl)
963 tree t2 = (DECL_USE_TEMPLATE (olddecl)
964 ? DECL_TI_TEMPLATE (olddecl)
969 if (CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl)
970 && ! (DECL_EXTERN_C_P (newdecl)
971 && DECL_EXTERN_C_P (olddecl)))
974 #ifdef NO_IMPLICIT_EXTERN_C
975 /* A new declaration doesn't match a built-in one unless it
976 is also extern "C". */
977 if (DECL_IS_BUILTIN (olddecl)
978 && DECL_EXTERN_C_P (olddecl) && !DECL_EXTERN_C_P (newdecl))
982 if (TREE_CODE (f1) != TREE_CODE (f2))
985 if (same_type_p (TREE_TYPE (f1), TREE_TYPE (f2)))
987 if (!prototype_p (f2) && DECL_EXTERN_C_P (olddecl)
988 && (DECL_BUILT_IN (olddecl)
989 #ifndef NO_IMPLICIT_EXTERN_C
990 || (DECL_IN_SYSTEM_HEADER (newdecl) && !DECL_CLASS_SCOPE_P (newdecl))
991 || (DECL_IN_SYSTEM_HEADER (olddecl) && !DECL_CLASS_SCOPE_P (olddecl))
995 types_match = self_promoting_args_p (p1);
996 if (p1 == void_list_node)
997 TREE_TYPE (newdecl) = TREE_TYPE (olddecl);
999 #ifndef NO_IMPLICIT_EXTERN_C
1000 else if (!prototype_p (f1)
1001 && (DECL_EXTERN_C_P (olddecl)
1002 && DECL_IN_SYSTEM_HEADER (olddecl)
1003 && !DECL_CLASS_SCOPE_P (olddecl))
1004 && (DECL_EXTERN_C_P (newdecl)
1005 && DECL_IN_SYSTEM_HEADER (newdecl)
1006 && !DECL_CLASS_SCOPE_P (newdecl)))
1008 types_match = self_promoting_args_p (p2);
1009 TREE_TYPE (newdecl) = TREE_TYPE (olddecl);
1015 && (TYPE_ATTRIBUTES (TREE_TYPE (newdecl)) == NULL_TREE
1016 || comp_type_attributes (TREE_TYPE (newdecl),
1017 TREE_TYPE (olddecl)) != 0);
1022 else if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1024 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl))
1025 != TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)))
1028 if (!comp_template_parms (DECL_TEMPLATE_PARMS (newdecl),
1029 DECL_TEMPLATE_PARMS (olddecl)))
1032 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
1033 types_match = same_type_p (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl)),
1034 TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl)));
1036 types_match = decls_match (DECL_TEMPLATE_RESULT (olddecl),
1037 DECL_TEMPLATE_RESULT (newdecl));
1041 /* Need to check scope for variable declaration (VAR_DECL).
1042 For typedef (TYPE_DECL), scope is ignored. */
1043 if (TREE_CODE (newdecl) == VAR_DECL
1044 && CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl)
1046 Two declarations for an object with C language linkage
1047 with the same name (ignoring the namespace that qualify
1048 it) that appear in different namespace scopes refer to
1050 && !(DECL_EXTERN_C_P (olddecl) && DECL_EXTERN_C_P (newdecl)))
1053 if (TREE_TYPE (newdecl) == error_mark_node)
1054 types_match = TREE_TYPE (olddecl) == error_mark_node;
1055 else if (TREE_TYPE (olddecl) == NULL_TREE)
1056 types_match = TREE_TYPE (newdecl) == NULL_TREE;
1057 else if (TREE_TYPE (newdecl) == NULL_TREE)
1060 types_match = comptypes (TREE_TYPE (newdecl),
1061 TREE_TYPE (olddecl),
1062 COMPARE_REDECLARATION);
1068 /* If NEWDECL is `static' and an `extern' was seen previously,
1069 warn about it. OLDDECL is the previous declaration.
1071 Note that this does not apply to the C++ case of declaring
1072 a variable `extern const' and then later `const'.
1074 Don't complain about built-in functions, since they are beyond
1075 the user's control. */
1078 warn_extern_redeclared_static (tree newdecl, tree olddecl)
1080 if (TREE_CODE (newdecl) == TYPE_DECL
1081 || TREE_CODE (newdecl) == TEMPLATE_DECL
1082 || TREE_CODE (newdecl) == CONST_DECL
1083 || TREE_CODE (newdecl) == NAMESPACE_DECL)
1086 /* Don't get confused by static member functions; that's a different
1088 if (TREE_CODE (newdecl) == FUNCTION_DECL
1089 && DECL_STATIC_FUNCTION_P (newdecl))
1092 /* If the old declaration was `static', or the new one isn't, then
1093 everything is OK. */
1094 if (DECL_THIS_STATIC (olddecl) || !DECL_THIS_STATIC (newdecl))
1097 /* It's OK to declare a builtin function as `static'. */
1098 if (TREE_CODE (olddecl) == FUNCTION_DECL
1099 && DECL_ARTIFICIAL (olddecl))
1102 permerror (input_location, "%qD was declared %<extern%> and later %<static%>", newdecl);
1103 permerror (input_location, "previous declaration of %q+D", olddecl);
1106 /* NEW_DECL is a redeclaration of OLD_DECL; both are functions or
1107 function templates. If their exception specifications do not
1108 match, issue a diagnostic. */
1111 check_redeclaration_exception_specification (tree new_decl,
1116 tree new_exceptions;
1117 tree old_exceptions;
1119 new_type = TREE_TYPE (new_decl);
1120 new_exceptions = TYPE_RAISES_EXCEPTIONS (new_type);
1121 old_type = TREE_TYPE (old_decl);
1122 old_exceptions = TYPE_RAISES_EXCEPTIONS (old_type);
1126 If any declaration of a function has an exception-specification,
1127 all declarations, including the definition and an explicit
1128 specialization, of that function shall have an
1129 exception-specification with the same set of type-ids. */
1130 if ((pedantic || ! DECL_IN_SYSTEM_HEADER (old_decl))
1131 && ! DECL_IS_BUILTIN (old_decl)
1133 && !comp_except_specs (new_exceptions, old_exceptions, ce_normal))
1135 error ("declaration of %qF has a different exception specifier",
1137 error ("from previous declaration %q+F", old_decl);
1141 /* Return true if OLD_DECL and NEW_DECL agree on constexprness.
1142 Otherwise issue diagnostics. */
1145 validate_constexpr_redeclaration (tree old_decl, tree new_decl)
1147 old_decl = STRIP_TEMPLATE (old_decl);
1148 new_decl = STRIP_TEMPLATE (new_decl);
1149 if (!VAR_OR_FUNCTION_DECL_P (old_decl)
1150 || !VAR_OR_FUNCTION_DECL_P (new_decl))
1152 if (DECL_DECLARED_CONSTEXPR_P (old_decl)
1153 == DECL_DECLARED_CONSTEXPR_P (new_decl))
1155 if (TREE_CODE (old_decl) == FUNCTION_DECL && DECL_BUILT_IN (old_decl))
1157 /* Hide a built-in declaration. */
1158 DECL_DECLARED_CONSTEXPR_P (old_decl)
1159 = DECL_DECLARED_CONSTEXPR_P (new_decl);
1162 error ("redeclaration %qD differs in %<constexpr%>", new_decl);
1163 error ("from previous declaration %q+D", old_decl);
1167 #define GNU_INLINE_P(fn) (DECL_DECLARED_INLINE_P (fn) \
1168 && lookup_attribute ("gnu_inline", \
1169 DECL_ATTRIBUTES (fn)))
1171 /* If NEWDECL is a redeclaration of OLDDECL, merge the declarations.
1172 If the redeclaration is invalid, a diagnostic is issued, and the
1173 error_mark_node is returned. Otherwise, OLDDECL is returned.
1175 If NEWDECL is not a redeclaration of OLDDECL, NULL_TREE is
1178 NEWDECL_IS_FRIEND is true if NEWDECL was declared as a friend. */
1181 duplicate_decls (tree newdecl, tree olddecl, bool newdecl_is_friend)
1183 unsigned olddecl_uid = DECL_UID (olddecl);
1184 int olddecl_friend = 0, types_match = 0, hidden_friend = 0;
1185 int new_defines_function = 0;
1186 tree new_template_info;
1188 if (newdecl == olddecl)
1191 types_match = decls_match (newdecl, olddecl);
1193 /* If either the type of the new decl or the type of the old decl is an
1194 error_mark_node, then that implies that we have already issued an
1195 error (earlier) for some bogus type specification, and in that case,
1196 it is rather pointless to harass the user with yet more error message
1197 about the same declaration, so just pretend the types match here. */
1198 if (TREE_TYPE (newdecl) == error_mark_node
1199 || TREE_TYPE (olddecl) == error_mark_node)
1200 return error_mark_node;
1202 if (DECL_P (olddecl)
1203 && TREE_CODE (newdecl) == FUNCTION_DECL
1204 && TREE_CODE (olddecl) == FUNCTION_DECL
1205 && (DECL_UNINLINABLE (newdecl) || DECL_UNINLINABLE (olddecl)))
1207 if (DECL_DECLARED_INLINE_P (newdecl)
1208 && DECL_UNINLINABLE (newdecl)
1209 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl)))
1210 /* Already warned elsewhere. */;
1211 else if (DECL_DECLARED_INLINE_P (olddecl)
1212 && DECL_UNINLINABLE (olddecl)
1213 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl)))
1214 /* Already warned. */;
1215 else if (DECL_DECLARED_INLINE_P (newdecl)
1216 && DECL_UNINLINABLE (olddecl)
1217 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl)))
1219 warning (OPT_Wattributes, "function %q+D redeclared as inline",
1221 warning (OPT_Wattributes, "previous declaration of %q+D "
1222 "with attribute noinline", olddecl);
1224 else if (DECL_DECLARED_INLINE_P (olddecl)
1225 && DECL_UNINLINABLE (newdecl)
1226 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl)))
1228 warning (OPT_Wattributes, "function %q+D redeclared with "
1229 "attribute noinline", newdecl);
1230 warning (OPT_Wattributes, "previous declaration of %q+D was inline",
1235 /* Check for redeclaration and other discrepancies. */
1236 if (TREE_CODE (olddecl) == FUNCTION_DECL
1237 && DECL_ARTIFICIAL (olddecl))
1239 gcc_assert (!DECL_HIDDEN_FRIEND_P (olddecl));
1240 if (TREE_CODE (newdecl) != FUNCTION_DECL)
1242 /* Avoid warnings redeclaring built-ins which have not been
1243 explicitly declared. */
1244 if (DECL_ANTICIPATED (olddecl))
1247 /* If you declare a built-in or predefined function name as static,
1248 the old definition is overridden, but optionally warn this was a
1249 bad choice of name. */
1250 if (! TREE_PUBLIC (newdecl))
1252 warning (OPT_Wshadow,
1253 DECL_BUILT_IN (olddecl)
1254 ? G_("shadowing built-in function %q#D")
1255 : G_("shadowing library function %q#D"), olddecl);
1256 /* Discard the old built-in function. */
1259 /* If the built-in is not ansi, then programs can override
1260 it even globally without an error. */
1261 else if (! DECL_BUILT_IN (olddecl))
1262 warning (0, "library function %q#D redeclared as non-function %q#D",
1266 error ("declaration of %q#D", newdecl);
1267 error ("conflicts with built-in declaration %q#D",
1272 else if (!types_match)
1274 /* Avoid warnings redeclaring built-ins which have not been
1275 explicitly declared. */
1276 if (DECL_ANTICIPATED (olddecl))
1278 /* Deal with fileptr_type_node. FILE type is not known
1279 at the time we create the builtins. */
1282 for (t1 = TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1283 t2 = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1285 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2))
1288 else if (TREE_VALUE (t2) == fileptr_type_node)
1290 tree t = TREE_VALUE (t1);
1292 if (TREE_CODE (t) == POINTER_TYPE
1293 && TYPE_NAME (TREE_TYPE (t))
1294 && DECL_NAME (TYPE_NAME (TREE_TYPE (t)))
1295 == get_identifier ("FILE")
1296 && compparms (TREE_CHAIN (t1), TREE_CHAIN (t2)))
1298 tree oldargs = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1300 TYPE_ARG_TYPES (TREE_TYPE (olddecl))
1301 = TYPE_ARG_TYPES (TREE_TYPE (newdecl));
1302 types_match = decls_match (newdecl, olddecl);
1304 return duplicate_decls (newdecl, olddecl,
1306 TYPE_ARG_TYPES (TREE_TYPE (olddecl)) = oldargs;
1309 else if (! same_type_p (TREE_VALUE (t1), TREE_VALUE (t2)))
1312 else if ((DECL_EXTERN_C_P (newdecl)
1313 && DECL_EXTERN_C_P (olddecl))
1314 || compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1315 TYPE_ARG_TYPES (TREE_TYPE (olddecl))))
1317 /* A near match; override the builtin. */
1319 if (TREE_PUBLIC (newdecl))
1321 warning (0, "new declaration %q#D", newdecl);
1322 warning (0, "ambiguates built-in declaration %q#D",
1326 warning (OPT_Wshadow,
1327 DECL_BUILT_IN (olddecl)
1328 ? G_("shadowing built-in function %q#D")
1329 : G_("shadowing library function %q#D"), olddecl);
1332 /* Discard the old built-in function. */
1335 /* Replace the old RTL to avoid problems with inlining. */
1336 COPY_DECL_RTL (newdecl, olddecl);
1338 /* Even if the types match, prefer the new declarations type for
1339 built-ins which have not been explicitly declared, for
1340 exception lists, etc... */
1341 else if (DECL_IS_BUILTIN (olddecl))
1343 tree type = TREE_TYPE (newdecl);
1344 tree attribs = (*targetm.merge_type_attributes)
1345 (TREE_TYPE (olddecl), type);
1347 type = cp_build_type_attribute_variant (type, attribs);
1348 TREE_TYPE (newdecl) = TREE_TYPE (olddecl) = type;
1351 /* If a function is explicitly declared "throw ()", propagate that to
1352 the corresponding builtin. */
1353 if (DECL_BUILT_IN_CLASS (olddecl) == BUILT_IN_NORMAL
1354 && DECL_ANTICIPATED (olddecl)
1355 && TREE_NOTHROW (newdecl)
1356 && !TREE_NOTHROW (olddecl)
1357 && built_in_decls [DECL_FUNCTION_CODE (olddecl)] != NULL_TREE
1358 && built_in_decls [DECL_FUNCTION_CODE (olddecl)] != olddecl
1360 TREE_NOTHROW (built_in_decls [DECL_FUNCTION_CODE (olddecl)]) = 1;
1362 /* Whether or not the builtin can throw exceptions has no
1363 bearing on this declarator. */
1364 TREE_NOTHROW (olddecl) = 0;
1366 if (DECL_THIS_STATIC (newdecl) && !DECL_THIS_STATIC (olddecl))
1368 /* If a builtin function is redeclared as `static', merge
1369 the declarations, but make the original one static. */
1370 DECL_THIS_STATIC (olddecl) = 1;
1371 TREE_PUBLIC (olddecl) = 0;
1373 /* Make the old declaration consistent with the new one so
1374 that all remnants of the builtin-ness of this function
1375 will be banished. */
1376 SET_DECL_LANGUAGE (olddecl, DECL_LANGUAGE (newdecl));
1377 COPY_DECL_RTL (newdecl, olddecl);
1380 else if (TREE_CODE (olddecl) != TREE_CODE (newdecl))
1382 /* C++ Standard, 3.3, clause 4:
1383 "[Note: a namespace name or a class template name must be unique
1384 in its declarative region (7.3.2, clause 14). ]" */
1385 if (TREE_CODE (olddecl) != NAMESPACE_DECL
1386 && TREE_CODE (newdecl) != NAMESPACE_DECL
1387 && (TREE_CODE (olddecl) != TEMPLATE_DECL
1388 || TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) != TYPE_DECL)
1389 && (TREE_CODE (newdecl) != TEMPLATE_DECL
1390 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) != TYPE_DECL))
1392 if ((TREE_CODE (olddecl) == TYPE_DECL && DECL_ARTIFICIAL (olddecl)
1393 && TREE_CODE (newdecl) != TYPE_DECL)
1394 || (TREE_CODE (newdecl) == TYPE_DECL && DECL_ARTIFICIAL (newdecl)
1395 && TREE_CODE (olddecl) != TYPE_DECL))
1397 /* We do nothing special here, because C++ does such nasty
1398 things with TYPE_DECLs. Instead, just let the TYPE_DECL
1399 get shadowed, and know that if we need to find a TYPE_DECL
1400 for a given name, we can look in the IDENTIFIER_TYPE_VALUE
1401 slot of the identifier. */
1405 if ((TREE_CODE (newdecl) == FUNCTION_DECL
1406 && DECL_FUNCTION_TEMPLATE_P (olddecl))
1407 || (TREE_CODE (olddecl) == FUNCTION_DECL
1408 && DECL_FUNCTION_TEMPLATE_P (newdecl)))
1412 error ("%q#D redeclared as different kind of symbol", newdecl);
1413 if (TREE_CODE (olddecl) == TREE_LIST)
1414 olddecl = TREE_VALUE (olddecl);
1415 error ("previous declaration of %q+#D", olddecl);
1417 return error_mark_node;
1419 else if (!types_match)
1421 if (CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl))
1422 /* These are certainly not duplicate declarations; they're
1423 from different scopes. */
1426 if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1428 /* The name of a class template may not be declared to refer to
1429 any other template, class, function, object, namespace, value,
1430 or type in the same scope. */
1431 if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) == TYPE_DECL
1432 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
1434 error ("declaration of template %q#D", newdecl);
1435 error ("conflicts with previous declaration %q+#D", olddecl);
1437 else if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) == FUNCTION_DECL
1438 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == FUNCTION_DECL
1439 && compparms (TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl))),
1440 TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl))))
1441 && comp_template_parms (DECL_TEMPLATE_PARMS (newdecl),
1442 DECL_TEMPLATE_PARMS (olddecl))
1443 /* Template functions can be disambiguated by
1445 && same_type_p (TREE_TYPE (TREE_TYPE (newdecl)),
1446 TREE_TYPE (TREE_TYPE (olddecl))))
1448 error ("new declaration %q#D", newdecl);
1449 error ("ambiguates old declaration %q+#D", olddecl);
1453 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1455 if (DECL_EXTERN_C_P (newdecl) && DECL_EXTERN_C_P (olddecl))
1457 error ("declaration of C function %q#D conflicts with",
1459 error ("previous declaration %q+#D here", olddecl);
1462 else if (compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1463 TYPE_ARG_TYPES (TREE_TYPE (olddecl))))
1465 error ("new declaration %q#D", newdecl);
1466 error ("ambiguates old declaration %q+#D", olddecl);
1467 return error_mark_node;
1474 error ("conflicting declaration %q#D", newdecl);
1475 error ("%q+D has a previous declaration as %q#D", olddecl, olddecl);
1476 return error_mark_node;
1479 else if (TREE_CODE (newdecl) == FUNCTION_DECL
1480 && ((DECL_TEMPLATE_SPECIALIZATION (olddecl)
1481 && (!DECL_TEMPLATE_INFO (newdecl)
1482 || (DECL_TI_TEMPLATE (newdecl)
1483 != DECL_TI_TEMPLATE (olddecl))))
1484 || (DECL_TEMPLATE_SPECIALIZATION (newdecl)
1485 && (!DECL_TEMPLATE_INFO (olddecl)
1486 || (DECL_TI_TEMPLATE (olddecl)
1487 != DECL_TI_TEMPLATE (newdecl))))))
1488 /* It's OK to have a template specialization and a non-template
1489 with the same type, or to have specializations of two
1490 different templates with the same type. Note that if one is a
1491 specialization, and the other is an instantiation of the same
1492 template, that we do not exit at this point. That situation
1493 can occur if we instantiate a template class, and then
1494 specialize one of its methods. This situation is valid, but
1495 the declarations must be merged in the usual way. */
1497 else if (TREE_CODE (newdecl) == FUNCTION_DECL
1498 && ((DECL_TEMPLATE_INSTANTIATION (olddecl)
1499 && !DECL_USE_TEMPLATE (newdecl))
1500 || (DECL_TEMPLATE_INSTANTIATION (newdecl)
1501 && !DECL_USE_TEMPLATE (olddecl))))
1502 /* One of the declarations is a template instantiation, and the
1503 other is not a template at all. That's OK. */
1505 else if (TREE_CODE (newdecl) == NAMESPACE_DECL)
1507 /* In [namespace.alias] we have:
1509 In a declarative region, a namespace-alias-definition can be
1510 used to redefine a namespace-alias declared in that declarative
1511 region to refer only to the namespace to which it already
1514 Therefore, if we encounter a second alias directive for the same
1515 alias, we can just ignore the second directive. */
1516 if (DECL_NAMESPACE_ALIAS (newdecl)
1517 && (DECL_NAMESPACE_ALIAS (newdecl)
1518 == DECL_NAMESPACE_ALIAS (olddecl)))
1520 /* [namespace.alias]
1522 A namespace-name or namespace-alias shall not be declared as
1523 the name of any other entity in the same declarative region.
1524 A namespace-name defined at global scope shall not be
1525 declared as the name of any other entity in any global scope
1527 error ("declaration of namespace %qD conflicts with", newdecl);
1528 error ("previous declaration of namespace %q+D here", olddecl);
1529 return error_mark_node;
1533 const char *errmsg = redeclaration_error_message (newdecl, olddecl);
1536 error_at (DECL_SOURCE_LOCATION (newdecl), errmsg, newdecl);
1537 if (DECL_NAME (olddecl) != NULL_TREE)
1538 error ((DECL_INITIAL (olddecl) && namespace_bindings_p ())
1539 ? "%q+#D previously defined here"
1540 : "%q+#D previously declared here", olddecl);
1541 return error_mark_node;
1543 else if (TREE_CODE (olddecl) == FUNCTION_DECL
1544 && DECL_INITIAL (olddecl) != NULL_TREE
1545 && !prototype_p (TREE_TYPE (olddecl))
1546 && prototype_p (TREE_TYPE (newdecl)))
1548 /* Prototype decl follows defn w/o prototype. */
1549 warning_at (input_location, 0, "prototype for %q+#D", newdecl);
1550 warning_at (DECL_SOURCE_LOCATION (olddecl), 0,
1551 "follows non-prototype definition here");
1553 else if ((TREE_CODE (olddecl) == FUNCTION_DECL
1554 || TREE_CODE (olddecl) == VAR_DECL)
1555 && DECL_LANGUAGE (newdecl) != DECL_LANGUAGE (olddecl))
1558 If two declarations of the same function or object
1559 specify different linkage-specifications ..., the program
1560 is ill-formed.... Except for functions with C++ linkage,
1561 a function declaration without a linkage specification
1562 shall not precede the first linkage specification for
1563 that function. A function can be declared without a
1564 linkage specification after an explicit linkage
1565 specification has been seen; the linkage explicitly
1566 specified in the earlier declaration is not affected by
1567 such a function declaration.
1569 DR 563 raises the question why the restrictions on
1570 functions should not also apply to objects. Older
1571 versions of G++ silently ignore the linkage-specification
1579 which is clearly wrong. Therefore, we now treat objects
1581 if (current_lang_depth () == 0)
1583 /* There is no explicit linkage-specification, so we use
1584 the linkage from the previous declaration. */
1585 if (!DECL_LANG_SPECIFIC (newdecl))
1586 retrofit_lang_decl (newdecl);
1587 SET_DECL_LANGUAGE (newdecl, DECL_LANGUAGE (olddecl));
1591 error ("previous declaration of %q+#D with %qL linkage",
1592 olddecl, DECL_LANGUAGE (olddecl));
1593 error ("conflicts with new declaration with %qL linkage",
1594 DECL_LANGUAGE (newdecl));
1598 if (DECL_LANG_SPECIFIC (olddecl) && DECL_USE_TEMPLATE (olddecl))
1600 else if (TREE_CODE (olddecl) == FUNCTION_DECL)
1602 tree t1 = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1603 tree t2 = TYPE_ARG_TYPES (TREE_TYPE (newdecl));
1606 if (TREE_CODE (TREE_TYPE (newdecl)) == METHOD_TYPE)
1607 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2);
1609 for (; t1 && t1 != void_list_node;
1610 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2), i++)
1611 if (TREE_PURPOSE (t1) && TREE_PURPOSE (t2))
1613 if (1 == simple_cst_equal (TREE_PURPOSE (t1),
1616 permerror (input_location, "default argument given for parameter %d of %q#D",
1618 permerror (input_location, "after previous specification in %q+#D", olddecl);
1622 error ("default argument given for parameter %d of %q#D",
1624 error ("after previous specification in %q+#D",
1631 /* Do not merge an implicit typedef with an explicit one. In:
1635 typedef class A A __attribute__ ((foo));
1637 the attribute should apply only to the typedef. */
1638 if (TREE_CODE (olddecl) == TYPE_DECL
1639 && (DECL_IMPLICIT_TYPEDEF_P (olddecl)
1640 || DECL_IMPLICIT_TYPEDEF_P (newdecl)))
1643 /* If new decl is `static' and an `extern' was seen previously,
1645 warn_extern_redeclared_static (newdecl, olddecl);
1647 if (!validate_constexpr_redeclaration (olddecl, newdecl))
1648 return error_mark_node;
1650 /* We have committed to returning 1 at this point. */
1651 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1653 /* Now that functions must hold information normally held
1654 by field decls, there is extra work to do so that
1655 declaration information does not get destroyed during
1657 if (DECL_VINDEX (olddecl))
1658 DECL_VINDEX (newdecl) = DECL_VINDEX (olddecl);
1659 if (DECL_CONTEXT (olddecl))
1660 DECL_CONTEXT (newdecl) = DECL_CONTEXT (olddecl);
1661 DECL_STATIC_CONSTRUCTOR (newdecl) |= DECL_STATIC_CONSTRUCTOR (olddecl);
1662 DECL_STATIC_DESTRUCTOR (newdecl) |= DECL_STATIC_DESTRUCTOR (olddecl);
1663 DECL_PURE_VIRTUAL_P (newdecl) |= DECL_PURE_VIRTUAL_P (olddecl);
1664 DECL_VIRTUAL_P (newdecl) |= DECL_VIRTUAL_P (olddecl);
1665 DECL_INVALID_OVERRIDER_P (newdecl) |= DECL_INVALID_OVERRIDER_P (olddecl);
1666 DECL_THIS_STATIC (newdecl) |= DECL_THIS_STATIC (olddecl);
1667 if (DECL_OVERLOADED_OPERATOR_P (olddecl) != ERROR_MARK)
1668 SET_OVERLOADED_OPERATOR_CODE
1669 (newdecl, DECL_OVERLOADED_OPERATOR_P (olddecl));
1670 new_defines_function = DECL_INITIAL (newdecl) != NULL_TREE;
1672 /* Optionally warn about more than one declaration for the same
1673 name, but don't warn about a function declaration followed by a
1675 if (warn_redundant_decls && ! DECL_ARTIFICIAL (olddecl)
1676 && !(new_defines_function && DECL_INITIAL (olddecl) == NULL_TREE)
1677 /* Don't warn about extern decl followed by definition. */
1678 && !(DECL_EXTERNAL (olddecl) && ! DECL_EXTERNAL (newdecl))
1679 /* Don't warn about friends, let add_friend take care of it. */
1680 && ! (newdecl_is_friend || DECL_FRIEND_P (olddecl)))
1682 warning (OPT_Wredundant_decls, "redundant redeclaration of %qD in same scope", newdecl);
1683 warning (OPT_Wredundant_decls, "previous declaration of %q+D", olddecl);
1686 if (DECL_DELETED_FN (newdecl))
1688 error ("deleted definition of %qD", newdecl);
1689 error ("after previous declaration %q+D", olddecl);
1693 /* Deal with C++: must preserve virtual function table size. */
1694 if (TREE_CODE (olddecl) == TYPE_DECL)
1696 tree newtype = TREE_TYPE (newdecl);
1697 tree oldtype = TREE_TYPE (olddecl);
1699 if (newtype != error_mark_node && oldtype != error_mark_node
1700 && TYPE_LANG_SPECIFIC (newtype) && TYPE_LANG_SPECIFIC (oldtype))
1701 CLASSTYPE_FRIEND_CLASSES (newtype)
1702 = CLASSTYPE_FRIEND_CLASSES (oldtype);
1704 DECL_ORIGINAL_TYPE (newdecl) = DECL_ORIGINAL_TYPE (olddecl);
1707 /* Copy all the DECL_... slots specified in the new decl
1708 except for any that we copy here from the old type. */
1709 DECL_ATTRIBUTES (newdecl)
1710 = (*targetm.merge_decl_attributes) (olddecl, newdecl);
1712 if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1716 old_result = DECL_TEMPLATE_RESULT (olddecl);
1717 new_result = DECL_TEMPLATE_RESULT (newdecl);
1718 TREE_TYPE (olddecl) = TREE_TYPE (old_result);
1719 DECL_TEMPLATE_SPECIALIZATIONS (olddecl)
1720 = chainon (DECL_TEMPLATE_SPECIALIZATIONS (olddecl),
1721 DECL_TEMPLATE_SPECIALIZATIONS (newdecl));
1723 DECL_ATTRIBUTES (old_result)
1724 = (*targetm.merge_decl_attributes) (old_result, new_result);
1726 if (DECL_FUNCTION_TEMPLATE_P (newdecl))
1728 if (GNU_INLINE_P (old_result) != GNU_INLINE_P (new_result)
1729 && DECL_INITIAL (new_result))
1731 if (DECL_INITIAL (old_result))
1732 DECL_UNINLINABLE (old_result) = 1;
1734 DECL_UNINLINABLE (old_result) = DECL_UNINLINABLE (new_result);
1735 DECL_EXTERNAL (old_result) = DECL_EXTERNAL (new_result);
1736 DECL_NOT_REALLY_EXTERN (old_result)
1737 = DECL_NOT_REALLY_EXTERN (new_result);
1738 DECL_INTERFACE_KNOWN (old_result)
1739 = DECL_INTERFACE_KNOWN (new_result);
1740 DECL_DECLARED_INLINE_P (old_result)
1741 = DECL_DECLARED_INLINE_P (new_result);
1742 DECL_DISREGARD_INLINE_LIMITS (old_result)
1743 |= DECL_DISREGARD_INLINE_LIMITS (new_result);
1748 DECL_DECLARED_INLINE_P (old_result)
1749 |= DECL_DECLARED_INLINE_P (new_result);
1750 DECL_DISREGARD_INLINE_LIMITS (old_result)
1751 |= DECL_DISREGARD_INLINE_LIMITS (new_result);
1752 check_redeclaration_exception_specification (newdecl, olddecl);
1756 /* If the new declaration is a definition, update the file and
1757 line information on the declaration, and also make
1758 the old declaration the same definition. */
1759 if (DECL_INITIAL (new_result) != NULL_TREE)
1761 DECL_SOURCE_LOCATION (olddecl)
1762 = DECL_SOURCE_LOCATION (old_result)
1763 = DECL_SOURCE_LOCATION (newdecl);
1764 DECL_INITIAL (old_result) = DECL_INITIAL (new_result);
1765 if (DECL_FUNCTION_TEMPLATE_P (newdecl))
1768 DECL_ARGUMENTS (old_result)
1769 = DECL_ARGUMENTS (new_result);
1770 for (parm = DECL_ARGUMENTS (old_result); parm;
1771 parm = DECL_CHAIN (parm))
1772 DECL_CONTEXT (parm) = old_result;
1781 /* Automatically handles default parameters. */
1782 tree oldtype = TREE_TYPE (olddecl);
1785 /* Merge the data types specified in the two decls. */
1786 newtype = merge_types (TREE_TYPE (newdecl), TREE_TYPE (olddecl));
1788 /* If merge_types produces a non-typedef type, just use the old type. */
1789 if (TREE_CODE (newdecl) == TYPE_DECL
1790 && newtype == DECL_ORIGINAL_TYPE (newdecl))
1793 if (TREE_CODE (newdecl) == VAR_DECL)
1795 DECL_THIS_EXTERN (newdecl) |= DECL_THIS_EXTERN (olddecl);
1796 DECL_INITIALIZED_P (newdecl) |= DECL_INITIALIZED_P (olddecl);
1797 DECL_NONTRIVIALLY_INITIALIZED_P (newdecl)
1798 |= DECL_NONTRIVIALLY_INITIALIZED_P (olddecl);
1799 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (newdecl)
1800 |= DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (olddecl);
1802 /* Merge the threadprivate attribute from OLDDECL into NEWDECL. */
1803 if (DECL_LANG_SPECIFIC (olddecl)
1804 && CP_DECL_THREADPRIVATE_P (olddecl))
1806 /* Allocate a LANG_SPECIFIC structure for NEWDECL, if needed. */
1807 if (!DECL_LANG_SPECIFIC (newdecl))
1808 retrofit_lang_decl (newdecl);
1810 DECL_TLS_MODEL (newdecl) = DECL_TLS_MODEL (olddecl);
1811 CP_DECL_THREADPRIVATE_P (newdecl) = 1;
1815 /* Do this after calling `merge_types' so that default
1816 parameters don't confuse us. */
1817 else if (TREE_CODE (newdecl) == FUNCTION_DECL)
1818 check_redeclaration_exception_specification (newdecl, olddecl);
1819 TREE_TYPE (newdecl) = TREE_TYPE (olddecl) = newtype;
1821 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1822 check_default_args (newdecl);
1824 /* Lay the type out, unless already done. */
1825 if (! same_type_p (newtype, oldtype)
1826 && TREE_TYPE (newdecl) != error_mark_node
1827 && !(processing_template_decl && uses_template_parms (newdecl)))
1828 layout_type (TREE_TYPE (newdecl));
1830 if ((TREE_CODE (newdecl) == VAR_DECL
1831 || TREE_CODE (newdecl) == PARM_DECL
1832 || TREE_CODE (newdecl) == RESULT_DECL
1833 || TREE_CODE (newdecl) == FIELD_DECL
1834 || TREE_CODE (newdecl) == TYPE_DECL)
1835 && !(processing_template_decl && uses_template_parms (newdecl)))
1836 layout_decl (newdecl, 0);
1838 /* Merge the type qualifiers. */
1839 if (TREE_READONLY (newdecl))
1840 TREE_READONLY (olddecl) = 1;
1841 if (TREE_THIS_VOLATILE (newdecl))
1842 TREE_THIS_VOLATILE (olddecl) = 1;
1843 if (TREE_NOTHROW (newdecl))
1844 TREE_NOTHROW (olddecl) = 1;
1846 /* Merge deprecatedness. */
1847 if (TREE_DEPRECATED (newdecl))
1848 TREE_DEPRECATED (olddecl) = 1;
1850 /* Preserve function specific target and optimization options */
1851 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1853 if (DECL_FUNCTION_SPECIFIC_TARGET (olddecl)
1854 && !DECL_FUNCTION_SPECIFIC_TARGET (newdecl))
1855 DECL_FUNCTION_SPECIFIC_TARGET (newdecl)
1856 = DECL_FUNCTION_SPECIFIC_TARGET (olddecl);
1858 if (DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl)
1859 && !DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl))
1860 DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl)
1861 = DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl);
1864 /* Merge the initialization information. */
1865 if (DECL_INITIAL (newdecl) == NULL_TREE
1866 && DECL_INITIAL (olddecl) != NULL_TREE)
1868 DECL_INITIAL (newdecl) = DECL_INITIAL (olddecl);
1869 DECL_SOURCE_LOCATION (newdecl) = DECL_SOURCE_LOCATION (olddecl);
1870 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1872 DECL_SAVED_TREE (newdecl) = DECL_SAVED_TREE (olddecl);
1873 DECL_STRUCT_FUNCTION (newdecl) = DECL_STRUCT_FUNCTION (olddecl);
1877 /* Merge the section attribute.
1878 We want to issue an error if the sections conflict but that must be
1879 done later in decl_attributes since we are called before attributes
1881 if (DECL_SECTION_NAME (newdecl) == NULL_TREE)
1882 DECL_SECTION_NAME (newdecl) = DECL_SECTION_NAME (olddecl);
1884 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1886 DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (newdecl)
1887 |= DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (olddecl);
1888 DECL_NO_LIMIT_STACK (newdecl) |= DECL_NO_LIMIT_STACK (olddecl);
1889 TREE_THIS_VOLATILE (newdecl) |= TREE_THIS_VOLATILE (olddecl);
1890 TREE_NOTHROW (newdecl) |= TREE_NOTHROW (olddecl);
1891 DECL_IS_MALLOC (newdecl) |= DECL_IS_MALLOC (olddecl);
1892 DECL_IS_OPERATOR_NEW (newdecl) |= DECL_IS_OPERATOR_NEW (olddecl);
1893 DECL_PURE_P (newdecl) |= DECL_PURE_P (olddecl);
1894 TREE_READONLY (newdecl) |= TREE_READONLY (olddecl);
1895 DECL_LOOPING_CONST_OR_PURE_P (newdecl)
1896 |= DECL_LOOPING_CONST_OR_PURE_P (olddecl);
1897 /* Keep the old RTL. */
1898 COPY_DECL_RTL (olddecl, newdecl);
1900 else if (TREE_CODE (newdecl) == VAR_DECL
1901 && (DECL_SIZE (olddecl) || !DECL_SIZE (newdecl)))
1903 /* Keep the old RTL. We cannot keep the old RTL if the old
1904 declaration was for an incomplete object and the new
1905 declaration is not since many attributes of the RTL will
1907 COPY_DECL_RTL (olddecl, newdecl);
1910 /* If cannot merge, then use the new type and qualifiers,
1911 and don't preserve the old rtl. */
1914 /* Clean out any memory we had of the old declaration. */
1915 tree oldstatic = value_member (olddecl, static_aggregates);
1917 TREE_VALUE (oldstatic) = error_mark_node;
1919 TREE_TYPE (olddecl) = TREE_TYPE (newdecl);
1920 TREE_READONLY (olddecl) = TREE_READONLY (newdecl);
1921 TREE_THIS_VOLATILE (olddecl) = TREE_THIS_VOLATILE (newdecl);
1922 TREE_SIDE_EFFECTS (olddecl) = TREE_SIDE_EFFECTS (newdecl);
1925 /* Merge the storage class information. */
1926 merge_weak (newdecl, olddecl);
1928 if (DECL_ONE_ONLY (olddecl))
1929 DECL_COMDAT_GROUP (newdecl) = DECL_COMDAT_GROUP (olddecl);
1931 DECL_DEFER_OUTPUT (newdecl) |= DECL_DEFER_OUTPUT (olddecl);
1932 TREE_PUBLIC (newdecl) = TREE_PUBLIC (olddecl);
1933 TREE_STATIC (olddecl) = TREE_STATIC (newdecl) |= TREE_STATIC (olddecl);
1934 if (! DECL_EXTERNAL (olddecl))
1935 DECL_EXTERNAL (newdecl) = 0;
1937 new_template_info = NULL_TREE;
1938 if (DECL_LANG_SPECIFIC (newdecl) && DECL_LANG_SPECIFIC (olddecl))
1940 bool new_redefines_gnu_inline = false;
1942 if (new_defines_function
1943 && ((DECL_INTERFACE_KNOWN (olddecl)
1944 && TREE_CODE (olddecl) == FUNCTION_DECL)
1945 || (TREE_CODE (olddecl) == TEMPLATE_DECL
1946 && (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl))
1947 == FUNCTION_DECL))))
1951 if (TREE_CODE (fn) == TEMPLATE_DECL)
1952 fn = DECL_TEMPLATE_RESULT (olddecl);
1954 new_redefines_gnu_inline = GNU_INLINE_P (fn) && DECL_INITIAL (fn);
1957 if (!new_redefines_gnu_inline)
1959 DECL_INTERFACE_KNOWN (newdecl) |= DECL_INTERFACE_KNOWN (olddecl);
1960 DECL_NOT_REALLY_EXTERN (newdecl) |= DECL_NOT_REALLY_EXTERN (olddecl);
1961 DECL_COMDAT (newdecl) |= DECL_COMDAT (olddecl);
1963 DECL_TEMPLATE_INSTANTIATED (newdecl)
1964 |= DECL_TEMPLATE_INSTANTIATED (olddecl);
1965 DECL_ODR_USED (newdecl) |= DECL_ODR_USED (olddecl);
1967 /* If the OLDDECL is an instantiation and/or specialization,
1968 then the NEWDECL must be too. But, it may not yet be marked
1969 as such if the caller has created NEWDECL, but has not yet
1970 figured out that it is a redeclaration. */
1971 if (!DECL_USE_TEMPLATE (newdecl))
1972 DECL_USE_TEMPLATE (newdecl) = DECL_USE_TEMPLATE (olddecl);
1974 /* Don't really know how much of the language-specific
1975 values we should copy from old to new. */
1976 DECL_IN_AGGR_P (newdecl) = DECL_IN_AGGR_P (olddecl);
1977 DECL_REPO_AVAILABLE_P (newdecl) = DECL_REPO_AVAILABLE_P (olddecl);
1978 DECL_INITIALIZED_IN_CLASS_P (newdecl)
1979 |= DECL_INITIALIZED_IN_CLASS_P (olddecl);
1981 if (LANG_DECL_HAS_MIN (newdecl))
1983 DECL_LANG_SPECIFIC (newdecl)->u.min.u2 =
1984 DECL_LANG_SPECIFIC (olddecl)->u.min.u2;
1985 if (DECL_TEMPLATE_INFO (newdecl))
1986 new_template_info = DECL_TEMPLATE_INFO (newdecl);
1987 DECL_TEMPLATE_INFO (newdecl) = DECL_TEMPLATE_INFO (olddecl);
1989 /* Only functions have these fields. */
1990 if (TREE_CODE (newdecl) == FUNCTION_DECL
1991 || DECL_FUNCTION_TEMPLATE_P (newdecl))
1993 DECL_NONCONVERTING_P (newdecl) = DECL_NONCONVERTING_P (olddecl);
1994 olddecl_friend = DECL_FRIEND_P (olddecl);
1995 hidden_friend = (DECL_ANTICIPATED (olddecl)
1996 && DECL_HIDDEN_FRIEND_P (olddecl)
1997 && newdecl_is_friend);
1998 DECL_BEFRIENDING_CLASSES (newdecl)
1999 = chainon (DECL_BEFRIENDING_CLASSES (newdecl),
2000 DECL_BEFRIENDING_CLASSES (olddecl));
2001 /* DECL_THUNKS is only valid for virtual functions,
2002 otherwise it is a DECL_FRIEND_CONTEXT. */
2003 if (DECL_VIRTUAL_P (newdecl))
2004 DECL_THUNKS (newdecl) = DECL_THUNKS (olddecl);
2006 /* Only variables have this field. */
2007 else if (TREE_CODE (newdecl) == VAR_DECL
2008 && VAR_HAD_UNKNOWN_BOUND (olddecl))
2009 SET_VAR_HAD_UNKNOWN_BOUND (newdecl);
2012 if (TREE_CODE (newdecl) == FUNCTION_DECL)
2016 /* Merge parameter attributes. */
2017 tree oldarg, newarg;
2018 for (oldarg = DECL_ARGUMENTS(olddecl),
2019 newarg = DECL_ARGUMENTS(newdecl);
2021 oldarg = DECL_CHAIN(oldarg), newarg = DECL_CHAIN(newarg)) {
2022 DECL_ATTRIBUTES (newarg)
2023 = (*targetm.merge_decl_attributes) (oldarg, newarg);
2024 DECL_ATTRIBUTES (oldarg) = DECL_ATTRIBUTES (newarg);
2027 if (DECL_TEMPLATE_INSTANTIATION (olddecl)
2028 && !DECL_TEMPLATE_INSTANTIATION (newdecl))
2030 /* If newdecl is not a specialization, then it is not a
2031 template-related function at all. And that means that we
2032 should have exited above, returning 0. */
2033 gcc_assert (DECL_TEMPLATE_SPECIALIZATION (newdecl));
2035 if (DECL_ODR_USED (olddecl))
2036 /* From [temp.expl.spec]:
2038 If a template, a member template or the member of a class
2039 template is explicitly specialized then that
2040 specialization shall be declared before the first use of
2041 that specialization that would cause an implicit
2042 instantiation to take place, in every translation unit in
2043 which such a use occurs. */
2044 error ("explicit specialization of %qD after first use",
2047 SET_DECL_TEMPLATE_SPECIALIZATION (olddecl);
2049 /* Don't propagate visibility from the template to the
2050 specialization here. We'll do that in determine_visibility if
2052 DECL_VISIBILITY_SPECIFIED (olddecl) = 0;
2054 /* [temp.expl.spec/14] We don't inline explicit specialization
2055 just because the primary template says so. */
2057 /* But still keep DECL_DISREGARD_INLINE_LIMITS in sync with
2058 the always_inline attribute. */
2059 if (DECL_DISREGARD_INLINE_LIMITS (olddecl)
2060 && !DECL_DISREGARD_INLINE_LIMITS (newdecl))
2062 if (DECL_DECLARED_INLINE_P (newdecl))
2063 DECL_DISREGARD_INLINE_LIMITS (newdecl) = true;
2065 DECL_ATTRIBUTES (newdecl)
2066 = remove_attribute ("always_inline",
2067 DECL_ATTRIBUTES (newdecl));
2070 else if (new_defines_function && DECL_INITIAL (olddecl))
2072 /* Never inline re-defined extern inline functions.
2073 FIXME: this could be better handled by keeping both
2074 function as separate declarations. */
2075 DECL_UNINLINABLE (newdecl) = 1;
2079 if (DECL_PENDING_INLINE_INFO (newdecl) == 0)
2080 DECL_PENDING_INLINE_INFO (newdecl) = DECL_PENDING_INLINE_INFO (olddecl);
2082 DECL_DECLARED_INLINE_P (newdecl) |= DECL_DECLARED_INLINE_P (olddecl);
2084 DECL_UNINLINABLE (newdecl) = DECL_UNINLINABLE (olddecl)
2085 = (DECL_UNINLINABLE (newdecl) || DECL_UNINLINABLE (olddecl));
2087 DECL_DISREGARD_INLINE_LIMITS (newdecl)
2088 = DECL_DISREGARD_INLINE_LIMITS (olddecl)
2089 = (DECL_DISREGARD_INLINE_LIMITS (newdecl)
2090 || DECL_DISREGARD_INLINE_LIMITS (olddecl));
2093 /* Preserve abstractness on cloned [cd]tors. */
2094 DECL_ABSTRACT (newdecl) = DECL_ABSTRACT (olddecl);
2096 /* Update newdecl's parms to point at olddecl. */
2097 for (parm = DECL_ARGUMENTS (newdecl); parm;
2098 parm = DECL_CHAIN (parm))
2099 DECL_CONTEXT (parm) = olddecl;
2103 SET_DECL_LANGUAGE (olddecl, DECL_LANGUAGE (newdecl));
2104 COPY_DECL_ASSEMBLER_NAME (newdecl, olddecl);
2105 COPY_DECL_RTL (newdecl, olddecl);
2107 if (! types_match || new_defines_function)
2109 /* These need to be copied so that the names are available.
2110 Note that if the types do match, we'll preserve inline
2111 info and other bits, but if not, we won't. */
2112 DECL_ARGUMENTS (olddecl) = DECL_ARGUMENTS (newdecl);
2113 DECL_RESULT (olddecl) = DECL_RESULT (newdecl);
2115 if (new_defines_function)
2116 /* If defining a function declared with other language
2117 linkage, use the previously declared language linkage. */
2118 SET_DECL_LANGUAGE (newdecl, DECL_LANGUAGE (olddecl));
2119 else if (types_match)
2121 /* If redeclaring a builtin function, and not a definition,
2122 it stays built in. */
2123 if (DECL_BUILT_IN (olddecl))
2125 DECL_BUILT_IN_CLASS (newdecl) = DECL_BUILT_IN_CLASS (olddecl);
2126 DECL_FUNCTION_CODE (newdecl) = DECL_FUNCTION_CODE (olddecl);
2127 /* If we're keeping the built-in definition, keep the rtl,
2128 regardless of declaration matches. */
2129 COPY_DECL_RTL (olddecl, newdecl);
2132 DECL_RESULT (newdecl) = DECL_RESULT (olddecl);
2133 /* Don't clear out the arguments if we're just redeclaring a
2135 if (DECL_ARGUMENTS (olddecl))
2136 DECL_ARGUMENTS (newdecl) = DECL_ARGUMENTS (olddecl);
2139 else if (TREE_CODE (newdecl) == NAMESPACE_DECL)
2140 NAMESPACE_LEVEL (newdecl) = NAMESPACE_LEVEL (olddecl);
2142 /* Now preserve various other info from the definition. */
2143 TREE_ADDRESSABLE (newdecl) = TREE_ADDRESSABLE (olddecl);
2144 TREE_ASM_WRITTEN (newdecl) = TREE_ASM_WRITTEN (olddecl);
2145 DECL_COMMON (newdecl) = DECL_COMMON (olddecl);
2146 COPY_DECL_ASSEMBLER_NAME (olddecl, newdecl);
2148 /* Warn about conflicting visibility specifications. */
2149 if (DECL_VISIBILITY_SPECIFIED (olddecl)
2150 && DECL_VISIBILITY_SPECIFIED (newdecl)
2151 && DECL_VISIBILITY (newdecl) != DECL_VISIBILITY (olddecl))
2153 warning_at (input_location, OPT_Wattributes,
2154 "%q+D: visibility attribute ignored because it", newdecl);
2155 warning_at (DECL_SOURCE_LOCATION (olddecl), OPT_Wattributes,
2156 "conflicts with previous declaration here");
2158 /* Choose the declaration which specified visibility. */
2159 if (DECL_VISIBILITY_SPECIFIED (olddecl))
2161 DECL_VISIBILITY (newdecl) = DECL_VISIBILITY (olddecl);
2162 DECL_VISIBILITY_SPECIFIED (newdecl) = 1;
2164 /* Init priority used to be merged from newdecl to olddecl by the memcpy,
2165 so keep this behavior. */
2166 if (TREE_CODE (newdecl) == VAR_DECL && DECL_HAS_INIT_PRIORITY_P (newdecl))
2168 SET_DECL_INIT_PRIORITY (olddecl, DECL_INIT_PRIORITY (newdecl));
2169 DECL_HAS_INIT_PRIORITY_P (olddecl) = 1;
2171 /* Likewise for DECL_USER_ALIGN and DECL_PACKED. */
2172 DECL_USER_ALIGN (olddecl) = DECL_USER_ALIGN (newdecl);
2173 if (TREE_CODE (newdecl) == FIELD_DECL)
2174 DECL_PACKED (olddecl) = DECL_PACKED (newdecl);
2176 /* The DECL_LANG_SPECIFIC information in OLDDECL will be replaced
2177 with that from NEWDECL below. */
2178 if (DECL_LANG_SPECIFIC (olddecl))
2180 gcc_assert (DECL_LANG_SPECIFIC (olddecl)
2181 != DECL_LANG_SPECIFIC (newdecl));
2182 ggc_free (DECL_LANG_SPECIFIC (olddecl));
2185 /* Merge the USED information. */
2186 if (TREE_USED (olddecl))
2187 TREE_USED (newdecl) = 1;
2188 else if (TREE_USED (newdecl))
2189 TREE_USED (olddecl) = 1;
2190 if (TREE_CODE (newdecl) == VAR_DECL)
2192 if (DECL_READ_P (olddecl))
2193 DECL_READ_P (newdecl) = 1;
2194 else if (DECL_READ_P (newdecl))
2195 DECL_READ_P (olddecl) = 1;
2197 if (DECL_PRESERVE_P (olddecl))
2198 DECL_PRESERVE_P (newdecl) = 1;
2199 else if (DECL_PRESERVE_P (newdecl))
2200 DECL_PRESERVE_P (olddecl) = 1;
2202 if (TREE_CODE (newdecl) == FUNCTION_DECL)
2206 function_size = sizeof (struct tree_decl_common);
2208 memcpy ((char *) olddecl + sizeof (struct tree_common),
2209 (char *) newdecl + sizeof (struct tree_common),
2210 function_size - sizeof (struct tree_common));
2212 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
2213 (char *) newdecl + sizeof (struct tree_decl_common),
2214 sizeof (struct tree_function_decl) - sizeof (struct tree_decl_common));
2215 if (new_template_info)
2216 /* If newdecl is a template instantiation, it is possible that
2217 the following sequence of events has occurred:
2219 o A friend function was declared in a class template. The
2220 class template was instantiated.
2222 o The instantiation of the friend declaration was
2223 recorded on the instantiation list, and is newdecl.
2225 o Later, however, instantiate_class_template called pushdecl
2226 on the newdecl to perform name injection. But, pushdecl in
2227 turn called duplicate_decls when it discovered that another
2228 declaration of a global function with the same name already
2231 o Here, in duplicate_decls, we decided to clobber newdecl.
2233 If we're going to do that, we'd better make sure that
2234 olddecl, and not newdecl, is on the list of
2235 instantiations so that if we try to do the instantiation
2236 again we won't get the clobbered declaration. */
2237 reregister_specialization (newdecl,
2243 size_t size = tree_code_size (TREE_CODE (olddecl));
2244 memcpy ((char *) olddecl + sizeof (struct tree_common),
2245 (char *) newdecl + sizeof (struct tree_common),
2246 sizeof (struct tree_decl_common) - sizeof (struct tree_common));
2247 switch (TREE_CODE (olddecl))
2257 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
2258 (char *) newdecl + sizeof (struct tree_decl_common),
2259 size - sizeof (struct tree_decl_common)
2260 + TREE_CODE_LENGTH (TREE_CODE (newdecl)) * sizeof (char *));
2264 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
2265 (char *) newdecl + sizeof (struct tree_decl_common),
2266 sizeof (struct tree_decl_non_common) - sizeof (struct tree_decl_common)
2267 + TREE_CODE_LENGTH (TREE_CODE (newdecl)) * sizeof (char *));
2271 DECL_UID (olddecl) = olddecl_uid;
2273 DECL_FRIEND_P (olddecl) = 1;
2276 DECL_ANTICIPATED (olddecl) = 1;
2277 DECL_HIDDEN_FRIEND_P (olddecl) = 1;
2280 /* NEWDECL contains the merged attribute lists.
2281 Update OLDDECL to be the same. */
2282 DECL_ATTRIBUTES (olddecl) = DECL_ATTRIBUTES (newdecl);
2284 /* If OLDDECL had its DECL_RTL instantiated, re-invoke make_decl_rtl
2285 so that encode_section_info has a chance to look at the new decl
2286 flags and attributes. */
2287 if (DECL_RTL_SET_P (olddecl)
2288 && (TREE_CODE (olddecl) == FUNCTION_DECL
2289 || (TREE_CODE (olddecl) == VAR_DECL
2290 && TREE_STATIC (olddecl))))
2291 make_decl_rtl (olddecl);
2293 /* The NEWDECL will no longer be needed. Because every out-of-class
2294 declaration of a member results in a call to duplicate_decls,
2295 freeing these nodes represents in a significant savings. */
2301 /* Return zero if the declaration NEWDECL is valid
2302 when the declaration OLDDECL (assumed to be for the same name)
2303 has already been seen.
2304 Otherwise return an error message format string with a %s
2305 where the identifier should go. */
2308 redeclaration_error_message (tree newdecl, tree olddecl)
2310 if (TREE_CODE (newdecl) == TYPE_DECL)
2312 /* Because C++ can put things into name space for free,
2313 constructs like "typedef struct foo { ... } foo"
2314 would look like an erroneous redeclaration. */
2315 if (same_type_p (TREE_TYPE (newdecl), TREE_TYPE (olddecl)))
2318 return G_("redefinition of %q#D");
2320 else if (TREE_CODE (newdecl) == FUNCTION_DECL)
2322 /* If this is a pure function, its olddecl will actually be
2323 the original initialization to `0' (which we force to call
2324 abort()). Don't complain about redefinition in this case. */
2325 if (DECL_LANG_SPECIFIC (olddecl) && DECL_PURE_VIRTUAL_P (olddecl)
2326 && DECL_INITIAL (olddecl) == NULL_TREE)
2329 /* If both functions come from different namespaces, this is not
2330 a redeclaration - this is a conflict with a used function. */
2331 if (DECL_NAMESPACE_SCOPE_P (olddecl)
2332 && DECL_CONTEXT (olddecl) != DECL_CONTEXT (newdecl)
2333 && ! decls_match (olddecl, newdecl))
2334 return G_("%qD conflicts with used function");
2336 /* We'll complain about linkage mismatches in
2337 warn_extern_redeclared_static. */
2339 /* Defining the same name twice is no good. */
2340 if (DECL_INITIAL (olddecl) != NULL_TREE
2341 && DECL_INITIAL (newdecl) != NULL_TREE)
2343 if (DECL_NAME (olddecl) == NULL_TREE)
2344 return G_("%q#D not declared in class");
2345 else if (!GNU_INLINE_P (olddecl)
2346 || GNU_INLINE_P (newdecl))
2347 return G_("redefinition of %q#D");
2350 if (DECL_DECLARED_INLINE_P (olddecl) && DECL_DECLARED_INLINE_P (newdecl))
2352 bool olda = GNU_INLINE_P (olddecl);
2353 bool newa = GNU_INLINE_P (newdecl);
2358 return G_("%q+D redeclared inline with "
2359 "%<gnu_inline%> attribute");
2361 return G_("%q+D redeclared inline without "
2362 "%<gnu_inline%> attribute");
2368 else if (TREE_CODE (newdecl) == TEMPLATE_DECL)
2372 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
2374 if (COMPLETE_TYPE_P (TREE_TYPE (newdecl))
2375 && COMPLETE_TYPE_P (TREE_TYPE (olddecl)))
2376 return G_("redefinition of %q#D");
2380 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) != FUNCTION_DECL
2381 || (DECL_TEMPLATE_RESULT (newdecl)
2382 == DECL_TEMPLATE_RESULT (olddecl)))
2385 nt = DECL_TEMPLATE_RESULT (newdecl);
2386 if (DECL_TEMPLATE_INFO (nt))
2387 nt = DECL_TEMPLATE_RESULT (template_for_substitution (nt));
2388 ot = DECL_TEMPLATE_RESULT (olddecl);
2389 if (DECL_TEMPLATE_INFO (ot))
2390 ot = DECL_TEMPLATE_RESULT (template_for_substitution (ot));
2391 if (DECL_INITIAL (nt) && DECL_INITIAL (ot)
2392 && (!GNU_INLINE_P (ot) || GNU_INLINE_P (nt)))
2393 return G_("redefinition of %q#D");
2395 if (DECL_DECLARED_INLINE_P (ot) && DECL_DECLARED_INLINE_P (nt))
2397 bool olda = GNU_INLINE_P (ot);
2398 bool newa = GNU_INLINE_P (nt);
2403 return G_("%q+D redeclared inline with "
2404 "%<gnu_inline%> attribute");
2406 return G_("%q+D redeclared inline without "
2407 "%<gnu_inline%> attribute");
2411 /* Core issue #226 (C++0x):
2413 If a friend function template declaration specifies a
2414 default template-argument, that declaration shall be a
2415 definition and shall be the only declaration of the
2416 function template in the translation unit. */
2417 if ((cxx_dialect != cxx98)
2418 && TREE_CODE (ot) == FUNCTION_DECL && DECL_FRIEND_P (ot)
2419 && !check_default_tmpl_args (nt, DECL_TEMPLATE_PARMS (newdecl),
2420 /*is_primary=*/1, /*is_partial=*/0,
2421 /*is_friend_decl=*/2))
2422 return G_("redeclaration of friend %q#D "
2423 "may not have default template arguments");
2427 else if (TREE_CODE (newdecl) == VAR_DECL
2428 && DECL_THREAD_LOCAL_P (newdecl) != DECL_THREAD_LOCAL_P (olddecl)
2429 && (! DECL_LANG_SPECIFIC (olddecl)
2430 || ! CP_DECL_THREADPRIVATE_P (olddecl)
2431 || DECL_THREAD_LOCAL_P (newdecl)))
2433 /* Only variables can be thread-local, and all declarations must
2434 agree on this property. */
2435 if (DECL_THREAD_LOCAL_P (newdecl))
2436 return G_("thread-local declaration of %q#D follows "
2437 "non-thread-local declaration");
2439 return G_("non-thread-local declaration of %q#D follows "
2440 "thread-local declaration");
2442 else if (toplevel_bindings_p () || DECL_NAMESPACE_SCOPE_P (newdecl))
2444 /* The objects have been declared at namespace scope. If either
2445 is a member of an anonymous union, then this is an invalid
2446 redeclaration. For example:
2452 if ((TREE_CODE (newdecl) == VAR_DECL && DECL_ANON_UNION_VAR_P (newdecl))
2453 || (TREE_CODE (olddecl) == VAR_DECL && DECL_ANON_UNION_VAR_P (olddecl)))
2454 return G_("redeclaration of %q#D");
2455 /* If at least one declaration is a reference, there is no
2456 conflict. For example:
2462 if (DECL_EXTERNAL (newdecl) || DECL_EXTERNAL (olddecl))
2464 /* Reject two definitions. */
2465 return G_("redefinition of %q#D");
2469 /* Objects declared with block scope: */
2470 /* Reject two definitions, and reject a definition
2471 together with an external reference. */
2472 if (!(DECL_EXTERNAL (newdecl) && DECL_EXTERNAL (olddecl)))
2473 return G_("redeclaration of %q#D");
2478 /* Hash and equality functions for the named_label table. */
2481 named_label_entry_hash (const void *data)
2483 const struct named_label_entry *ent = (const struct named_label_entry *) data;
2484 return DECL_UID (ent->label_decl);
2488 named_label_entry_eq (const void *a, const void *b)
2490 const struct named_label_entry *ent_a = (const struct named_label_entry *) a;
2491 const struct named_label_entry *ent_b = (const struct named_label_entry *) b;
2492 return ent_a->label_decl == ent_b->label_decl;
2495 /* Create a new label, named ID. */
2498 make_label_decl (tree id, int local_p)
2500 struct named_label_entry *ent;
2504 decl = build_decl (input_location, LABEL_DECL, id, void_type_node);
2506 DECL_CONTEXT (decl) = current_function_decl;
2507 DECL_MODE (decl) = VOIDmode;
2508 C_DECLARED_LABEL_FLAG (decl) = local_p;
2510 /* Say where one reference is to the label, for the sake of the
2511 error if it is not defined. */
2512 DECL_SOURCE_LOCATION (decl) = input_location;
2514 /* Record the fact that this identifier is bound to this label. */
2515 SET_IDENTIFIER_LABEL_VALUE (id, decl);
2517 /* Create the label htab for the function on demand. */
2519 named_labels = htab_create_ggc (13, named_label_entry_hash,
2520 named_label_entry_eq, NULL);
2522 /* Record this label on the list of labels used in this function.
2523 We do this before calling make_label_decl so that we get the
2524 IDENTIFIER_LABEL_VALUE before the new label is declared. */
2525 ent = ggc_alloc_cleared_named_label_entry ();
2526 ent->label_decl = decl;
2528 slot = htab_find_slot (named_labels, ent, INSERT);
2529 gcc_assert (*slot == NULL);
2535 /* Look for a label named ID in the current function. If one cannot
2536 be found, create one. (We keep track of used, but undefined,
2537 labels, and complain about them at the end of a function.) */
2540 lookup_label_1 (tree id)
2544 /* You can't use labels at global scope. */
2545 if (current_function_decl == NULL_TREE)
2547 error ("label %qE referenced outside of any function", id);
2551 /* See if we've already got this label. */
2552 decl = IDENTIFIER_LABEL_VALUE (id);
2553 if (decl != NULL_TREE && DECL_CONTEXT (decl) == current_function_decl)
2556 decl = make_label_decl (id, /*local_p=*/0);
2560 /* Wrapper for lookup_label_1. */
2563 lookup_label (tree id)
2566 bool subtime = timevar_cond_start (TV_NAME_LOOKUP);
2567 ret = lookup_label_1 (id);
2568 timevar_cond_stop (TV_NAME_LOOKUP, subtime);
2572 /* Declare a local label named ID. */
2575 declare_local_label (tree id)
2578 cp_label_binding *bind;
2580 /* Add a new entry to the SHADOWED_LABELS list so that when we leave
2581 this scope we can restore the old value of IDENTIFIER_TYPE_VALUE. */
2582 bind = VEC_safe_push (cp_label_binding, gc,
2583 current_binding_level->shadowed_labels, NULL);
2584 bind->prev_value = IDENTIFIER_LABEL_VALUE (id);
2586 decl = make_label_decl (id, /*local_p=*/1);
2592 /* Returns nonzero if it is ill-formed to jump past the declaration of
2593 DECL. Returns 2 if it's also a real problem. */
2596 decl_jump_unsafe (tree decl)
2598 /* [stmt.dcl]/3: A program that jumps from a point where a local variable
2599 with automatic storage duration is not in scope to a point where it is
2600 in scope is ill-formed unless the variable has scalar type, class type
2601 with a trivial default constructor and a trivial destructor, a
2602 cv-qualified version of one of these types, or an array of one of the
2603 preceding types and is declared without an initializer (8.5). */
2604 tree type = TREE_TYPE (decl);
2606 if (TREE_CODE (decl) != VAR_DECL || TREE_STATIC (decl)
2607 || type == error_mark_node)
2610 type = strip_array_types (type);
2612 if (type_has_nontrivial_default_init (TREE_TYPE (decl))
2613 || DECL_NONTRIVIALLY_INITIALIZED_P (decl))
2616 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
2622 /* A subroutine of check_previous_goto_1 to identify a branch to the user. */
2625 identify_goto (tree decl, const location_t *locus)
2628 permerror (input_location, "jump to label %qD", decl);
2630 permerror (input_location, "jump to case label");
2632 permerror (*locus, " from here");
2635 /* Check that a single previously seen jump to a newly defined label
2636 is OK. DECL is the LABEL_DECL or 0; LEVEL is the binding_level for
2637 the jump context; NAMES are the names in scope in LEVEL at the jump
2638 context; LOCUS is the source position of the jump or 0. Returns
2639 true if all is well. */
2642 check_previous_goto_1 (tree decl, struct cp_binding_level* level, tree names,
2643 bool exited_omp, const location_t *locus)
2645 struct cp_binding_level *b;
2646 bool identified = false, saw_eh = false, saw_omp = false;
2650 identify_goto (decl, locus);
2651 error (" exits OpenMP structured block");
2652 identified = saw_omp = true;
2655 for (b = current_binding_level; b ; b = b->level_chain)
2657 tree new_decls, old_decls = (b == level ? names : NULL_TREE);
2659 for (new_decls = b->names; new_decls != old_decls;
2660 new_decls = DECL_CHAIN (new_decls))
2662 int problem = decl_jump_unsafe (new_decls);
2668 identify_goto (decl, locus);
2672 error (" crosses initialization of %q+#D", new_decls);
2674 permerror (input_location, " enters scope of %q+#D which has "
2675 "non-trivial destructor", new_decls);
2680 if ((b->kind == sk_try || b->kind == sk_catch) && !saw_eh)
2684 identify_goto (decl, locus);
2687 if (b->kind == sk_try)
2688 error (" enters try block");
2690 error (" enters catch block");
2693 if (b->kind == sk_omp && !saw_omp)
2697 identify_goto (decl, locus);
2700 error (" enters OpenMP structured block");
2709 check_previous_goto (tree decl, struct named_label_use_entry *use)
2711 check_previous_goto_1 (decl, use->binding_level,
2712 use->names_in_scope, use->in_omp_scope,
2713 &use->o_goto_locus);
2717 check_switch_goto (struct cp_binding_level* level)
2719 return check_previous_goto_1 (NULL_TREE, level, level->names, false, NULL);
2722 /* Check that a new jump to a label DECL is OK. Called by
2723 finish_goto_stmt. */
2726 check_goto (tree decl)
2728 struct named_label_entry *ent, dummy;
2729 bool saw_catch = false, identified = false;
2733 /* We can't know where a computed goto is jumping.
2734 So we assume that it's OK. */
2735 if (TREE_CODE (decl) != LABEL_DECL)
2738 /* We didn't record any information about this label when we created it,
2739 and there's not much point since it's trivial to analyze as a return. */
2740 if (decl == cdtor_label)
2743 dummy.label_decl = decl;
2744 ent = (struct named_label_entry *) htab_find (named_labels, &dummy);
2745 gcc_assert (ent != NULL);
2747 /* If the label hasn't been defined yet, defer checking. */
2748 if (! DECL_INITIAL (decl))
2750 struct named_label_use_entry *new_use;
2752 /* Don't bother creating another use if the last goto had the
2753 same data, and will therefore create the same set of errors. */
2755 && ent->uses->names_in_scope == current_binding_level->names)
2758 new_use = ggc_alloc_named_label_use_entry ();
2759 new_use->binding_level = current_binding_level;
2760 new_use->names_in_scope = current_binding_level->names;
2761 new_use->o_goto_locus = input_location;
2762 new_use->in_omp_scope = false;
2764 new_use->next = ent->uses;
2765 ent->uses = new_use;
2769 if (ent->in_try_scope || ent->in_catch_scope
2770 || ent->in_omp_scope || !VEC_empty (tree, ent->bad_decls))
2772 permerror (input_location, "jump to label %q+D", decl);
2773 permerror (input_location, " from here");
2777 FOR_EACH_VEC_ELT (tree, ent->bad_decls, ix, bad)
2779 int u = decl_jump_unsafe (bad);
2781 if (u > 1 && DECL_ARTIFICIAL (bad))
2783 /* Can't skip init of __exception_info. */
2784 error_at (DECL_SOURCE_LOCATION (bad), " enters catch block");
2788 error (" skips initialization of %q+#D", bad);
2790 permerror (input_location, " enters scope of %q+#D which has "
2791 "non-trivial destructor", bad);
2794 if (ent->in_try_scope)
2795 error (" enters try block");
2796 else if (ent->in_catch_scope && !saw_catch)
2797 error (" enters catch block");
2799 if (ent->in_omp_scope)
2800 error (" enters OpenMP structured block");
2801 else if (flag_openmp)
2803 struct cp_binding_level *b;
2804 for (b = current_binding_level; b ; b = b->level_chain)
2806 if (b == ent->binding_level)
2808 if (b->kind == sk_omp)
2812 permerror (input_location, "jump to label %q+D", decl);
2813 permerror (input_location, " from here");
2816 error (" exits OpenMP structured block");
2823 /* Check that a return is ok wrt OpenMP structured blocks.
2824 Called by finish_return_stmt. Returns true if all is well. */
2827 check_omp_return (void)
2829 struct cp_binding_level *b;
2830 for (b = current_binding_level; b ; b = b->level_chain)
2831 if (b->kind == sk_omp)
2833 error ("invalid exit from OpenMP structured block");
2836 else if (b->kind == sk_function_parms)
2841 /* Define a label, specifying the location in the source file.
2842 Return the LABEL_DECL node for the label. */
2845 define_label_1 (location_t location, tree name)
2847 struct named_label_entry *ent, dummy;
2848 struct cp_binding_level *p;
2851 decl = lookup_label (name);
2853 dummy.label_decl = decl;
2854 ent = (struct named_label_entry *) htab_find (named_labels, &dummy);
2855 gcc_assert (ent != NULL);
2857 /* After labels, make any new cleanups in the function go into their
2858 own new (temporary) binding contour. */
2859 for (p = current_binding_level;
2860 p->kind != sk_function_parms;
2862 p->more_cleanups_ok = 0;
2864 if (name == get_identifier ("wchar_t"))
2865 permerror (input_location, "label named wchar_t");
2867 if (DECL_INITIAL (decl) != NULL_TREE)
2869 error ("duplicate label %qD", decl);
2870 return error_mark_node;
2874 struct named_label_use_entry *use;
2876 /* Mark label as having been defined. */
2877 DECL_INITIAL (decl) = error_mark_node;
2878 /* Say where in the source. */
2879 DECL_SOURCE_LOCATION (decl) = location;
2881 ent->binding_level = current_binding_level;
2882 ent->names_in_scope = current_binding_level->names;
2884 for (use = ent->uses; use ; use = use->next)
2885 check_previous_goto (decl, use);
2892 /* Wrapper for define_label_1. */
2895 define_label (location_t location, tree name)
2898 timevar_start (TV_NAME_LOOKUP);
2899 ret = define_label_1 (location, name);
2900 timevar_stop (TV_NAME_LOOKUP);
2907 struct cp_binding_level *level;
2908 struct cp_switch *next;
2909 /* The SWITCH_STMT being built. */
2911 /* A splay-tree mapping the low element of a case range to the high
2912 element, or NULL_TREE if there is no high element. Used to
2913 determine whether or not a new case label duplicates an old case
2914 label. We need a tree, rather than simply a hash table, because
2915 of the GNU case range extension. */
2919 /* A stack of the currently active switch statements. The innermost
2920 switch statement is on the top of the stack. There is no need to
2921 mark the stack for garbage collection because it is only active
2922 during the processing of the body of a function, and we never
2923 collect at that point. */
2925 static struct cp_switch *switch_stack;
2927 /* Called right after a switch-statement condition is parsed.
2928 SWITCH_STMT is the switch statement being parsed. */
2931 push_switch (tree switch_stmt)
2933 struct cp_switch *p = XNEW (struct cp_switch);
2934 p->level = current_binding_level;
2935 p->next = switch_stack;
2936 p->switch_stmt = switch_stmt;
2937 p->cases = splay_tree_new (case_compare, NULL, NULL);
2944 struct cp_switch *cs = switch_stack;
2945 location_t switch_location;
2947 /* Emit warnings as needed. */
2948 switch_location = EXPR_LOC_OR_HERE (cs->switch_stmt);
2949 if (!processing_template_decl)
2950 c_do_switch_warnings (cs->cases, switch_location,
2951 SWITCH_STMT_TYPE (cs->switch_stmt),
2952 SWITCH_STMT_COND (cs->switch_stmt));
2954 splay_tree_delete (cs->cases);
2955 switch_stack = switch_stack->next;
2959 /* Note that we've seen a definition of a case label, and complain if this
2960 is a bad place for one. */
2963 finish_case_label (location_t loc, tree low_value, tree high_value)
2966 struct cp_binding_level *p;
2968 if (processing_template_decl)
2972 /* For templates, just add the case label; we'll do semantic
2973 analysis at instantiation-time. */
2974 label = build_decl (loc, LABEL_DECL, NULL_TREE, NULL_TREE);
2975 return add_stmt (build_case_label (low_value, high_value, label));
2978 /* Find the condition on which this switch statement depends. */
2979 cond = SWITCH_STMT_COND (switch_stack->switch_stmt);
2980 if (cond && TREE_CODE (cond) == TREE_LIST)
2981 cond = TREE_VALUE (cond);
2983 if (!check_switch_goto (switch_stack->level))
2984 return error_mark_node;
2987 low_value = cxx_constant_value (low_value);
2989 high_value = cxx_constant_value (high_value);
2991 r = c_add_case_label (loc, switch_stack->cases, cond,
2992 SWITCH_STMT_TYPE (switch_stack->switch_stmt),
2993 low_value, high_value);
2995 /* After labels, make any new cleanups in the function go into their
2996 own new (temporary) binding contour. */
2997 for (p = current_binding_level;
2998 p->kind != sk_function_parms;
3000 p->more_cleanups_ok = 0;
3005 /* Hash a TYPENAME_TYPE. K is really of type `tree'. */
3008 typename_hash (const void* k)
3011 const_tree const t = (const_tree) k;
3013 hash = (htab_hash_pointer (TYPE_CONTEXT (t))
3014 ^ htab_hash_pointer (DECL_NAME (TYPE_NAME (t))));
3019 typedef struct typename_info {
3027 /* Compare two TYPENAME_TYPEs. K1 is really of type `tree', K2 is
3028 really of type `typename_info*' */
3031 typename_compare (const void * k1, const void * k2)
3033 const_tree const t1 = (const_tree) k1;
3034 const typename_info *const t2 = (const typename_info *) k2;
3036 return (DECL_NAME (TYPE_NAME (t1)) == t2->name
3037 && TYPE_CONTEXT (t1) == t2->scope
3038 && TYPENAME_TYPE_FULLNAME (t1) == t2->template_id
3039 && TYPENAME_IS_ENUM_P (t1) == t2->enum_p
3040 && TYPENAME_IS_CLASS_P (t1) == t2->class_p);
3043 /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
3044 the type of `T', NAME is the IDENTIFIER_NODE for `t'.
3046 Returns the new TYPENAME_TYPE. */
3048 static GTY ((param_is (union tree_node))) htab_t typename_htab;
3051 build_typename_type (tree context, tree name, tree fullname,
3052 enum tag_types tag_type)
3060 if (typename_htab == NULL)
3061 typename_htab = htab_create_ggc (61, &typename_hash,
3062 &typename_compare, NULL);
3064 ti.scope = FROB_CONTEXT (context);
3066 ti.template_id = fullname;
3067 ti.enum_p = tag_type == enum_type;
3068 ti.class_p = (tag_type == class_type
3069 || tag_type == record_type
3070 || tag_type == union_type);
3071 hash = (htab_hash_pointer (ti.scope)
3072 ^ htab_hash_pointer (ti.name));
3074 /* See if we already have this type. */
3075 e = htab_find_slot_with_hash (typename_htab, &ti, hash, INSERT);
3080 /* Build the TYPENAME_TYPE. */
3081 t = cxx_make_type (TYPENAME_TYPE);
3082 TYPE_CONTEXT (t) = ti.scope;
3083 TYPENAME_TYPE_FULLNAME (t) = ti.template_id;
3084 TYPENAME_IS_ENUM_P (t) = ti.enum_p;
3085 TYPENAME_IS_CLASS_P (t) = ti.class_p;
3087 /* Build the corresponding TYPE_DECL. */
3088 d = build_decl (input_location, TYPE_DECL, name, t);
3089 TYPE_NAME (TREE_TYPE (d)) = d;
3090 TYPE_STUB_DECL (TREE_TYPE (d)) = d;
3091 DECL_CONTEXT (d) = FROB_CONTEXT (context);
3092 DECL_ARTIFICIAL (d) = 1;
3094 /* Store it in the hash table. */
3097 /* TYPENAME_TYPEs must always be compared structurally, because
3098 they may or may not resolve down to another type depending on
3099 the currently open classes. */
3100 SET_TYPE_STRUCTURAL_EQUALITY (t);
3106 /* Resolve `typename CONTEXT::NAME'. TAG_TYPE indicates the tag
3107 provided to name the type. Returns an appropriate type, unless an
3108 error occurs, in which case error_mark_node is returned. If we
3109 locate a non-artificial TYPE_DECL and TF_KEEP_TYPE_DECL is set, we
3110 return that, rather than the _TYPE it corresponds to, in other
3111 cases we look through the type decl. If TF_ERROR is set, complain
3112 about errors, otherwise be quiet. */
3115 make_typename_type (tree context, tree name, enum tag_types tag_type,
3116 tsubst_flags_t complain)
3122 if (name == error_mark_node
3123 || context == NULL_TREE
3124 || context == error_mark_node)
3125 return error_mark_node;
3129 if (!(TYPE_LANG_SPECIFIC (name)
3130 && (CLASSTYPE_IS_TEMPLATE (name)
3131 || CLASSTYPE_USE_TEMPLATE (name))))
3132 name = TYPE_IDENTIFIER (name);
3134 /* Create a TEMPLATE_ID_EXPR for the type. */
3135 name = build_nt (TEMPLATE_ID_EXPR,
3136 CLASSTYPE_TI_TEMPLATE (name),
3137 CLASSTYPE_TI_ARGS (name));
3139 else if (TREE_CODE (name) == TYPE_DECL)
3140 name = DECL_NAME (name);
3144 if (TREE_CODE (name) == TEMPLATE_ID_EXPR)
3146 name = TREE_OPERAND (name, 0);
3147 if (TREE_CODE (name) == TEMPLATE_DECL)
3148 name = TREE_OPERAND (fullname, 0) = DECL_NAME (name);
3149 else if (TREE_CODE (name) == OVERLOAD)
3151 error ("%qD is not a type", name);
3152 return error_mark_node;
3155 if (TREE_CODE (name) == TEMPLATE_DECL)
3157 error ("%qD used without template parameters", name);
3158 return error_mark_node;
3160 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
3161 gcc_assert (TYPE_P (context));
3163 if (!MAYBE_CLASS_TYPE_P (context))
3165 if (complain & tf_error)
3166 error ("%q#T is not a class", context);
3167 return error_mark_node;
3170 /* When the CONTEXT is a dependent type, NAME could refer to a
3171 dependent base class of CONTEXT. But look inside it anyway
3172 if CONTEXT is a currently open scope, in case it refers to a
3173 member of the current instantiation or a non-dependent base;
3174 lookup will stop when we hit a dependent base. */
3175 if (!dependent_scope_p (context))
3176 /* We should only set WANT_TYPE when we're a nested typename type.
3177 Then we can give better diagnostics if we find a non-type. */
3178 t = lookup_field (context, name, 2, /*want_type=*/true);
3182 if ((!t || TREE_CODE (t) == TREE_LIST) && dependent_type_p (context))
3183 return build_typename_type (context, name, fullname, tag_type);
3185 want_template = TREE_CODE (fullname) == TEMPLATE_ID_EXPR;
3189 if (complain & tf_error)
3190 error (want_template ? "no class template named %q#T in %q#T"
3191 : "no type named %q#T in %q#T", name, context);
3192 return error_mark_node;
3195 /* Pull out the template from an injected-class-name (or multiple). */
3197 t = maybe_get_template_decl_from_type_decl (t);
3199 if (TREE_CODE (t) == TREE_LIST)
3201 if (complain & tf_error)
3203 error ("lookup of %qT in %qT is ambiguous", name, context);
3204 print_candidates (t);
3206 return error_mark_node;
3209 if (want_template && !DECL_CLASS_TEMPLATE_P (t))
3211 if (complain & tf_error)
3212 error ("%<typename %T::%D%> names %q#T, which is not a class template",
3214 return error_mark_node;
3216 if (!want_template && TREE_CODE (t) != TYPE_DECL)
3218 if (complain & tf_error)
3219 error ("%<typename %T::%D%> names %q#T, which is not a type",
3221 return error_mark_node;
3224 if (complain & tf_error)
3225 perform_or_defer_access_check (TYPE_BINFO (context), t, t);
3227 /* If we are currently parsing a template and if T is a typedef accessed
3228 through CONTEXT then we need to remember and check access of T at
3229 template instantiation time. */
3230 add_typedef_to_current_template_for_access_check (t, context, input_location);
3233 return lookup_template_class (t, TREE_OPERAND (fullname, 1),
3235 /*entering_scope=*/0,
3236 tf_warning_or_error | tf_user);
3238 if (DECL_ARTIFICIAL (t) || !(complain & tf_keep_type_decl))
3244 /* Resolve `CONTEXT::template NAME'. Returns a TEMPLATE_DECL if the name
3245 can be resolved or an UNBOUND_CLASS_TEMPLATE, unless an error occurs,
3246 in which case error_mark_node is returned.
3248 If PARM_LIST is non-NULL, also make sure that the template parameter
3249 list of TEMPLATE_DECL matches.
3251 If COMPLAIN zero, don't complain about any errors that occur. */
3254 make_unbound_class_template (tree context, tree name, tree parm_list,
3255 tsubst_flags_t complain)
3261 name = TYPE_IDENTIFIER (name);
3262 else if (DECL_P (name))
3263 name = DECL_NAME (name);
3264 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
3266 if (!dependent_type_p (context)
3267 || currently_open_class (context))
3269 tree tmpl = NULL_TREE;
3271 if (MAYBE_CLASS_TYPE_P (context))
3272 tmpl = lookup_field (context, name, 0, false);
3274 if (tmpl && TREE_CODE (tmpl) == TYPE_DECL)
3275 tmpl = maybe_get_template_decl_from_type_decl (tmpl);
3277 if (!tmpl || !DECL_CLASS_TEMPLATE_P (tmpl))
3279 if (complain & tf_error)
3280 error ("no class template named %q#T in %q#T", name, context);
3281 return error_mark_node;
3285 && !comp_template_parms (DECL_TEMPLATE_PARMS (tmpl), parm_list))
3287 if (complain & tf_error)
3289 error ("template parameters do not match template");
3290 error ("%q+D declared here", tmpl);
3292 return error_mark_node;
3295 if (complain & tf_error)
3296 perform_or_defer_access_check (TYPE_BINFO (context), tmpl, tmpl);
3301 /* Build the UNBOUND_CLASS_TEMPLATE. */
3302 t = cxx_make_type (UNBOUND_CLASS_TEMPLATE);
3303 TYPE_CONTEXT (t) = FROB_CONTEXT (context);
3304 TREE_TYPE (t) = NULL_TREE;
3305 SET_TYPE_STRUCTURAL_EQUALITY (t);
3307 /* Build the corresponding TEMPLATE_DECL. */
3308 d = build_decl (input_location, TEMPLATE_DECL, name, t);
3309 TYPE_NAME (TREE_TYPE (d)) = d;
3310 TYPE_STUB_DECL (TREE_TYPE (d)) = d;
3311 DECL_CONTEXT (d) = FROB_CONTEXT (context);
3312 DECL_ARTIFICIAL (d) = 1;
3313 DECL_TEMPLATE_PARMS (d) = parm_list;
3320 /* Push the declarations of builtin types into the namespace.
3321 RID_INDEX is the index of the builtin type in the array
3322 RID_POINTERS. NAME is the name used when looking up the builtin
3323 type. TYPE is the _TYPE node for the builtin type. */
3326 record_builtin_type (enum rid rid_index,
3330 tree rname = NULL_TREE, tname = NULL_TREE;
3331 tree tdecl = NULL_TREE;
3333 if ((int) rid_index < (int) RID_MAX)
3334 rname = ridpointers[(int) rid_index];
3336 tname = get_identifier (name);
3338 /* The calls to SET_IDENTIFIER_GLOBAL_VALUE below should be
3339 eliminated. Built-in types should not be looked up name; their
3340 names are keywords that the parser can recognize. However, there
3341 is code in c-common.c that uses identifier_global_value to look
3342 up built-in types by name. */
3345 tdecl = build_decl (BUILTINS_LOCATION, TYPE_DECL, tname, type);
3346 DECL_ARTIFICIAL (tdecl) = 1;
3347 SET_IDENTIFIER_GLOBAL_VALUE (tname, tdecl);
3353 tdecl = build_decl (BUILTINS_LOCATION, TYPE_DECL, rname, type);
3354 DECL_ARTIFICIAL (tdecl) = 1;
3356 SET_IDENTIFIER_GLOBAL_VALUE (rname, tdecl);
3359 if (!TYPE_NAME (type))
3360 TYPE_NAME (type) = tdecl;
3363 debug_hooks->type_decl (tdecl, 0);
3366 /* Record one of the standard Java types.
3367 * Declare it as having the given NAME.
3368 * If SIZE > 0, it is the size of one of the integral types;
3369 * otherwise it is the negative of the size of one of the other types. */
3372 record_builtin_java_type (const char* name, int size)
3377 type = build_nonstandard_integer_type (size, 0);
3378 type = build_distinct_type_copy (type);
3380 else if (size > -32)
3383 /* "__java_char" or ""__java_boolean". */
3384 type = build_nonstandard_integer_type (-size, 1);
3385 type = build_distinct_type_copy (type);
3386 /* Get the signed type cached and attached to the unsigned type,
3387 so it doesn't get garbage-collected at "random" times,
3388 causing potential codegen differences out of different UIDs
3389 and different alias set numbers. */
3390 stype = build_nonstandard_integer_type (-size, 0);
3391 stype = build_distinct_type_copy (stype);
3392 TREE_CHAIN (type) = stype;
3393 /*if (size == -1) TREE_SET_CODE (type, BOOLEAN_TYPE);*/
3396 { /* "__java_float" or ""__java_double". */
3397 type = make_node (REAL_TYPE);
3398 TYPE_PRECISION (type) = - size;
3401 record_builtin_type (RID_MAX, name, type);
3402 decl = TYPE_NAME (type);
3404 /* Suppress generate debug symbol entries for these types,
3405 since for normal C++ they are just clutter.
3406 However, push_lang_context undoes this if extern "Java" is seen. */
3407 DECL_IGNORED_P (decl) = 1;
3409 TYPE_FOR_JAVA (type) = 1;
3413 /* Push a type into the namespace so that the back ends ignore it. */
3416 record_unknown_type (tree type, const char* name)
3418 tree decl = pushdecl (build_decl (UNKNOWN_LOCATION,
3419 TYPE_DECL, get_identifier (name), type));
3420 /* Make sure the "unknown type" typedecl gets ignored for debug info. */
3421 DECL_IGNORED_P (decl) = 1;
3422 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
3423 TYPE_SIZE (type) = TYPE_SIZE (void_type_node);
3424 TYPE_ALIGN (type) = 1;
3425 TYPE_USER_ALIGN (type) = 0;
3426 SET_TYPE_MODE (type, TYPE_MODE (void_type_node));
3429 /* A string for which we should create an IDENTIFIER_NODE at
3432 typedef struct predefined_identifier
3434 /* The name of the identifier. */
3435 const char *const name;
3436 /* The place where the IDENTIFIER_NODE should be stored. */
3438 /* Nonzero if this is the name of a constructor or destructor. */
3439 const int ctor_or_dtor_p;
3440 } predefined_identifier;
3442 /* Create all the predefined identifiers. */
3445 initialize_predefined_identifiers (void)
3447 const predefined_identifier *pid;
3449 /* A table of identifiers to create at startup. */
3450 static const predefined_identifier predefined_identifiers[] = {
3451 { "C++", &lang_name_cplusplus, 0 },
3452 { "C", &lang_name_c, 0 },
3453 { "Java", &lang_name_java, 0 },
3454 /* Some of these names have a trailing space so that it is
3455 impossible for them to conflict with names written by users. */
3456 { "__ct ", &ctor_identifier, 1 },
3457 { "__base_ctor ", &base_ctor_identifier, 1 },
3458 { "__comp_ctor ", &complete_ctor_identifier, 1 },
3459 { "__dt ", &dtor_identifier, 1 },
3460 { "__comp_dtor ", &complete_dtor_identifier, 1 },
3461 { "__base_dtor ", &base_dtor_identifier, 1 },
3462 { "__deleting_dtor ", &deleting_dtor_identifier, 1 },
3463 { IN_CHARGE_NAME, &in_charge_identifier, 0 },
3464 { "nelts", &nelts_identifier, 0 },
3465 { THIS_NAME, &this_identifier, 0 },
3466 { VTABLE_DELTA_NAME, &delta_identifier, 0 },
3467 { VTABLE_PFN_NAME, &pfn_identifier, 0 },
3468 { "_vptr", &vptr_identifier, 0 },
3469 { "__vtt_parm", &vtt_parm_identifier, 0 },
3470 { "::", &global_scope_name, 0 },
3471 { "std", &std_identifier, 0 },
3475 for (pid = predefined_identifiers; pid->name; ++pid)
3477 *pid->node = get_identifier (pid->name);
3478 if (pid->ctor_or_dtor_p)
3479 IDENTIFIER_CTOR_OR_DTOR_P (*pid->node) = 1;
3483 /* Create the predefined scalar types of C,
3484 and some nodes representing standard constants (0, 1, (void *)0).
3485 Initialize the global binding level.
3486 Make definitions for built-in primitive functions. */
3489 cxx_init_decl_processing (void)
3492 tree void_ftype_ptr;
3494 build_common_tree_nodes (flag_signed_char);
3496 /* Create all the identifiers we need. */
3497 initialize_predefined_identifiers ();
3499 /* Create the global variables. */
3500 push_to_top_level ();
3502 current_function_decl = NULL_TREE;
3503 current_binding_level = NULL;
3504 /* Enter the global namespace. */
3505 gcc_assert (global_namespace == NULL_TREE);
3506 global_namespace = build_lang_decl (NAMESPACE_DECL, global_scope_name,
3508 DECL_CONTEXT (global_namespace) = build_translation_unit_decl (NULL_TREE);
3509 TREE_PUBLIC (global_namespace) = 1;
3510 begin_scope (sk_namespace, global_namespace);
3512 current_lang_name = NULL_TREE;
3514 if (flag_visibility_ms_compat)
3515 default_visibility = VISIBILITY_HIDDEN;
3518 current_lang_name = lang_name_c;
3520 /* Create the `std' namespace. */
3521 push_namespace (std_identifier);
3522 std_node = current_namespace;
3525 c_common_nodes_and_builtins ();
3527 java_byte_type_node = record_builtin_java_type ("__java_byte", 8);
3528 java_short_type_node = record_builtin_java_type ("__java_short", 16);
3529 java_int_type_node = record_builtin_java_type ("__java_int", 32);
3530 java_long_type_node = record_builtin_java_type ("__java_long", 64);
3531 java_float_type_node = record_builtin_java_type ("__java_float", -32);
3532 java_double_type_node = record_builtin_java_type ("__java_double", -64);
3533 java_char_type_node = record_builtin_java_type ("__java_char", -16);
3534 java_boolean_type_node = record_builtin_java_type ("__java_boolean", -1);
3536 integer_two_node = build_int_cst (NULL_TREE, 2);
3538 record_builtin_type (RID_BOOL, "bool", boolean_type_node);
3539 truthvalue_type_node = boolean_type_node;
3540 truthvalue_false_node = boolean_false_node;
3541 truthvalue_true_node = boolean_true_node;
3543 empty_except_spec = build_tree_list (NULL_TREE, NULL_TREE);
3544 noexcept_true_spec = build_tree_list (boolean_true_node, NULL_TREE);
3545 noexcept_false_spec = build_tree_list (boolean_false_node, NULL_TREE);
3548 record_builtin_type (RID_MAX, NULL, string_type_node);
3551 delta_type_node = ptrdiff_type_node;
3552 vtable_index_type = ptrdiff_type_node;
3554 vtt_parm_type = build_pointer_type (const_ptr_type_node);
3555 void_ftype = build_function_type_list (void_type_node, NULL_TREE);
3556 void_ftype_ptr = build_function_type_list (void_type_node,
3557 ptr_type_node, NULL_TREE);
3559 = build_exception_variant (void_ftype_ptr, empty_except_spec);
3561 /* C++ extensions */
3563 unknown_type_node = make_node (LANG_TYPE);
3564 record_unknown_type (unknown_type_node, "unknown type");
3566 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
3567 TREE_TYPE (unknown_type_node) = unknown_type_node;
3569 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
3571 TYPE_POINTER_TO (unknown_type_node) = unknown_type_node;
3572 TYPE_REFERENCE_TO (unknown_type_node) = unknown_type_node;
3574 init_list_type_node = make_node (LANG_TYPE);
3575 record_unknown_type (init_list_type_node, "init list");
3578 /* Make sure we get a unique function type, so we can give
3579 its pointer type a name. (This wins for gdb.) */
3580 tree vfunc_type = make_node (FUNCTION_TYPE);
3581 TREE_TYPE (vfunc_type) = integer_type_node;
3582 TYPE_ARG_TYPES (vfunc_type) = NULL_TREE;
3583 layout_type (vfunc_type);
3585 vtable_entry_type = build_pointer_type (vfunc_type);
3587 record_builtin_type (RID_MAX, VTBL_PTR_TYPE, vtable_entry_type);
3590 = build_cplus_array_type (vtable_entry_type, NULL_TREE);
3591 layout_type (vtbl_type_node);
3592 vtbl_type_node = cp_build_qualified_type (vtbl_type_node, TYPE_QUAL_CONST);
3593 record_builtin_type (RID_MAX, NULL, vtbl_type_node);
3594 vtbl_ptr_type_node = build_pointer_type (vtable_entry_type);
3595 layout_type (vtbl_ptr_type_node);
3596 record_builtin_type (RID_MAX, NULL, vtbl_ptr_type_node);
3598 push_namespace (get_identifier ("__cxxabiv1"));
3599 abi_node = current_namespace;
3602 global_type_node = make_node (LANG_TYPE);
3603 record_unknown_type (global_type_node, "global type");
3606 current_lang_name = lang_name_cplusplus;
3609 tree newtype, deltype;
3610 tree ptr_ftype_sizetype;
3614 = build_function_type_list (ptr_type_node, size_type_node, NULL_TREE);
3615 if (cxx_dialect == cxx98)
3618 tree bad_alloc_type_node;
3619 tree bad_alloc_decl;
3621 push_namespace (std_identifier);
3622 bad_alloc_id = get_identifier ("bad_alloc");
3623 bad_alloc_type_node = make_class_type (RECORD_TYPE);
3624 TYPE_CONTEXT (bad_alloc_type_node) = current_namespace;
3626 = create_implicit_typedef (bad_alloc_id, bad_alloc_type_node);
3627 DECL_CONTEXT (bad_alloc_decl) = current_namespace;
3631 = add_exception_specifier (NULL_TREE, bad_alloc_type_node, -1);
3634 new_eh_spec = noexcept_false_spec;
3636 newtype = build_exception_variant (ptr_ftype_sizetype, new_eh_spec);
3637 deltype = build_exception_variant (void_ftype_ptr, empty_except_spec);
3638 push_cp_library_fn (NEW_EXPR, newtype);
3639 push_cp_library_fn (VEC_NEW_EXPR, newtype);
3640 global_delete_fndecl = push_cp_library_fn (DELETE_EXPR, deltype);
3641 push_cp_library_fn (VEC_DELETE_EXPR, deltype);
3643 nullptr_type_node = make_node (NULLPTR_TYPE);
3644 TYPE_SIZE (nullptr_type_node) = bitsize_int (GET_MODE_BITSIZE (ptr_mode));
3645 TYPE_SIZE_UNIT (nullptr_type_node) = size_int (GET_MODE_SIZE (ptr_mode));
3646 TYPE_UNSIGNED (nullptr_type_node) = 1;
3647 TYPE_PRECISION (nullptr_type_node) = GET_MODE_BITSIZE (ptr_mode);
3648 SET_TYPE_MODE (nullptr_type_node, Pmode);
3649 record_builtin_type (RID_MAX, "decltype(nullptr)", nullptr_type_node);
3650 nullptr_node = build_int_cst (nullptr_type_node, 0);
3654 = build_library_fn_ptr ("__cxa_pure_virtual", void_ftype);
3656 /* Perform other language dependent initializations. */
3657 init_class_processing ();
3658 init_rtti_processing ();
3659 init_template_processing ();
3661 if (flag_exceptions)
3662 init_exception_processing ();
3664 if (! supports_one_only ())
3667 make_fname_decl = cp_make_fname_decl;
3668 start_fname_decls ();
3670 /* Show we use EH for cleanups. */
3671 if (flag_exceptions)
3672 using_eh_for_cleanups ();
3675 /* Generate an initializer for a function naming variable from
3676 NAME. NAME may be NULL, to indicate a dependent name. TYPE_P is
3677 filled in with the type of the init. */
3680 cp_fname_init (const char* name, tree *type_p)
3682 tree domain = NULL_TREE;
3684 tree init = NULL_TREE;
3689 length = strlen (name);
3690 domain = build_index_type (size_int (length));
3691 init = build_string (length + 1, name);
3694 type = cp_build_qualified_type (char_type_node, TYPE_QUAL_CONST);
3695 type = build_cplus_array_type (type, domain);
3700 TREE_TYPE (init) = type;
3702 init = error_mark_node;
3707 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give
3708 the decl, LOC is the location to give the decl, NAME is the
3709 initialization string and TYPE_DEP indicates whether NAME depended
3710 on the type of the function. We make use of that to detect
3711 __PRETTY_FUNCTION__ inside a template fn. This is being done lazily
3712 at the point of first use, so we mustn't push the decl now. */
3715 cp_make_fname_decl (location_t loc, tree id, int type_dep)
3717 const char *const name = (type_dep && processing_template_decl
3718 ? NULL : fname_as_string (type_dep));
3720 tree init = cp_fname_init (name, &type);
3721 tree decl = build_decl (loc, VAR_DECL, id, type);
3724 free (CONST_CAST (char *, name));
3726 /* As we're using pushdecl_with_scope, we must set the context. */
3727 DECL_CONTEXT (decl) = current_function_decl;
3728 DECL_PRETTY_FUNCTION_P (decl) = type_dep;
3730 TREE_STATIC (decl) = 1;
3731 TREE_READONLY (decl) = 1;
3732 DECL_ARTIFICIAL (decl) = 1;
3734 TREE_USED (decl) = 1;
3736 if (current_function_decl)
3738 struct cp_binding_level *b = current_binding_level;
3739 if (b->kind == sk_function_parms)
3740 return error_mark_node;
3741 while (b->level_chain->kind != sk_function_parms)
3743 pushdecl_with_scope (decl, b, /*is_friend=*/false);
3744 cp_finish_decl (decl, init, /*init_const_expr_p=*/false, NULL_TREE,
3745 LOOKUP_ONLYCONVERTING);
3749 DECL_THIS_STATIC (decl) = true;
3750 pushdecl_top_level_and_finish (decl, init);
3757 builtin_function_1 (tree decl, tree context, bool is_global)
3759 tree id = DECL_NAME (decl);
3760 const char *name = IDENTIFIER_POINTER (id);
3762 retrofit_lang_decl (decl);
3764 DECL_ARTIFICIAL (decl) = 1;
3765 SET_OVERLOADED_OPERATOR_CODE (decl, ERROR_MARK);
3766 SET_DECL_LANGUAGE (decl, lang_c);
3767 /* Runtime library routines are, by definition, available in an
3768 external shared object. */
3769 DECL_VISIBILITY (decl) = VISIBILITY_DEFAULT;
3770 DECL_VISIBILITY_SPECIFIED (decl) = 1;
3772 DECL_CONTEXT (decl) = context;
3775 pushdecl_top_level (decl);
3779 /* A function in the user's namespace should have an explicit
3780 declaration before it is used. Mark the built-in function as
3781 anticipated but not actually declared. */
3782 if (name[0] != '_' || name[1] != '_')
3783 DECL_ANTICIPATED (decl) = 1;
3784 else if (strncmp (name + 2, "builtin_", strlen ("builtin_")) != 0)
3786 size_t len = strlen (name);
3788 /* Treat __*_chk fortification functions as anticipated as well,
3789 unless they are __builtin_*. */
3790 if (len > strlen ("___chk")
3791 && memcmp (name + len - strlen ("_chk"),
3792 "_chk", strlen ("_chk") + 1) == 0)
3793 DECL_ANTICIPATED (decl) = 1;
3800 cxx_builtin_function (tree decl)
3802 tree id = DECL_NAME (decl);
3803 const char *name = IDENTIFIER_POINTER (id);
3804 /* All builtins that don't begin with an '_' should additionally
3805 go in the 'std' namespace. */
3808 tree decl2 = copy_node(decl);
3809 push_namespace (std_identifier);
3810 builtin_function_1 (decl2, std_node, false);
3814 return builtin_function_1 (decl, NULL_TREE, false);
3817 /* Like cxx_builtin_function, but guarantee the function is added to the global
3818 scope. This is to allow function specific options to add new machine
3819 dependent builtins when the target ISA changes via attribute((target(...)))
3820 which saves space on program startup if the program does not use non-generic
3824 cxx_builtin_function_ext_scope (tree decl)
3827 tree id = DECL_NAME (decl);
3828 const char *name = IDENTIFIER_POINTER (id);
3829 /* All builtins that don't begin with an '_' should additionally
3830 go in the 'std' namespace. */
3833 tree decl2 = copy_node(decl);
3834 push_namespace (std_identifier);
3835 builtin_function_1 (decl2, std_node, true);
3839 return builtin_function_1 (decl, NULL_TREE, true);
3842 /* Generate a FUNCTION_DECL with the typical flags for a runtime library
3843 function. Not called directly. */
3846 build_library_fn_1 (tree name, enum tree_code operator_code, tree type)
3848 tree fn = build_lang_decl (FUNCTION_DECL, name, type);
3849 DECL_EXTERNAL (fn) = 1;
3850 TREE_PUBLIC (fn) = 1;
3851 DECL_ARTIFICIAL (fn) = 1;
3852 SET_OVERLOADED_OPERATOR_CODE (fn, operator_code);
3853 SET_DECL_LANGUAGE (fn, lang_c);
3854 /* Runtime library routines are, by definition, available in an
3855 external shared object. */
3856 DECL_VISIBILITY (fn) = VISIBILITY_DEFAULT;
3857 DECL_VISIBILITY_SPECIFIED (fn) = 1;
3861 /* Returns the _DECL for a library function with C linkage.
3862 We assume that such functions never throw; if this is incorrect,
3863 callers should unset TREE_NOTHROW. */
3866 build_library_fn (tree name, tree type)
3868 tree fn = build_library_fn_1 (name, ERROR_MARK, type);
3869 TREE_NOTHROW (fn) = 1;
3873 /* Returns the _DECL for a library function with C++ linkage. */
3876 build_cp_library_fn (tree name, enum tree_code operator_code, tree type)
3878 tree fn = build_library_fn_1 (name, operator_code, type);
3879 TREE_NOTHROW (fn) = TYPE_NOTHROW_P (type);
3880 DECL_CONTEXT (fn) = FROB_CONTEXT (current_namespace);
3881 SET_DECL_LANGUAGE (fn, lang_cplusplus);
3885 /* Like build_library_fn, but takes a C string instead of an
3889 build_library_fn_ptr (const char* name, tree type)
3891 return build_library_fn (get_identifier (name), type);
3894 /* Like build_cp_library_fn, but takes a C string instead of an
3898 build_cp_library_fn_ptr (const char* name, tree type)
3900 return build_cp_library_fn (get_identifier (name), ERROR_MARK, type);
3903 /* Like build_library_fn, but also pushes the function so that we will
3904 be able to find it via IDENTIFIER_GLOBAL_VALUE. Also, the function
3905 may throw exceptions listed in RAISES. */
3908 push_library_fn (tree name, tree type, tree raises)
3913 type = build_exception_variant (type, raises);
3915 fn = build_library_fn (name, type);
3916 pushdecl_top_level (fn);
3920 /* Like build_cp_library_fn, but also pushes the function so that it
3921 will be found by normal lookup. */
3924 push_cp_library_fn (enum tree_code operator_code, tree type)
3926 tree fn = build_cp_library_fn (ansi_opname (operator_code),
3933 /* Like push_library_fn, but takes a TREE_LIST of parm types rather than
3937 push_void_library_fn (tree name, tree parmtypes)
3939 tree type = build_function_type (void_type_node, parmtypes);
3940 return push_library_fn (name, type, NULL_TREE);
3943 /* Like push_library_fn, but also note that this function throws
3944 and does not return. Used for __throw_foo and the like. */
3947 push_throw_library_fn (tree name, tree type)
3949 tree fn = push_library_fn (name, type, NULL_TREE);
3950 TREE_THIS_VOLATILE (fn) = 1;
3951 TREE_NOTHROW (fn) = 0;
3955 /* When we call finish_struct for an anonymous union, we create
3956 default copy constructors and such. But, an anonymous union
3957 shouldn't have such things; this function undoes the damage to the
3958 anonymous union type T.
3960 (The reason that we create the synthesized methods is that we don't
3961 distinguish `union { int i; }' from `typedef union { int i; } U'.
3962 The first is an anonymous union; the second is just an ordinary
3966 fixup_anonymous_aggr (tree t)
3970 /* Wipe out memory of synthesized methods. */
3971 TYPE_HAS_USER_CONSTRUCTOR (t) = 0;
3972 TYPE_HAS_DEFAULT_CONSTRUCTOR (t) = 0;
3973 TYPE_HAS_COPY_CTOR (t) = 0;
3974 TYPE_HAS_CONST_COPY_CTOR (t) = 0;
3975 TYPE_HAS_COPY_ASSIGN (t) = 0;
3976 TYPE_HAS_CONST_COPY_ASSIGN (t) = 0;
3978 /* Splice the implicitly generated functions out of the TYPE_METHODS
3980 q = &TYPE_METHODS (t);
3983 if (DECL_ARTIFICIAL (*q))
3984 *q = TREE_CHAIN (*q);
3986 q = &DECL_CHAIN (*q);
3989 /* ISO C++ 9.5.3. Anonymous unions may not have function members. */
3990 if (TYPE_METHODS (t))
3992 tree decl = TYPE_MAIN_DECL (t);
3994 if (TREE_CODE (t) != UNION_TYPE)
3995 error_at (DECL_SOURCE_LOCATION (decl),
3996 "an anonymous struct cannot have function members");
3998 error_at (DECL_SOURCE_LOCATION (decl),
3999 "an anonymous union cannot have function members");
4002 /* Anonymous aggregates cannot have fields with ctors, dtors or complex
4003 assignment operators (because they cannot have these methods themselves).
4004 For anonymous unions this is already checked because they are not allowed
4005 in any union, otherwise we have to check it. */
4006 if (TREE_CODE (t) != UNION_TYPE)
4010 for (field = TYPE_FIELDS (t); field; field = DECL_CHAIN (field))
4011 if (TREE_CODE (field) == FIELD_DECL)
4013 type = TREE_TYPE (field);
4014 if (CLASS_TYPE_P (type))
4016 if (TYPE_NEEDS_CONSTRUCTING (type))
4017 error ("member %q+#D with constructor not allowed "
4018 "in anonymous aggregate", field);
4019 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
4020 error ("member %q+#D with destructor not allowed "
4021 "in anonymous aggregate", field);
4022 if (TYPE_HAS_COMPLEX_COPY_ASSIGN (type))
4023 error ("member %q+#D with copy assignment operator "
4024 "not allowed in anonymous aggregate", field);
4030 /* Make sure that a declaration with no declarator is well-formed, i.e.
4031 just declares a tagged type or anonymous union.
4033 Returns the type declared; or NULL_TREE if none. */
4036 check_tag_decl (cp_decl_specifier_seq *declspecs)
4038 int saw_friend = declspecs->specs[(int)ds_friend] != 0;
4039 int saw_typedef = declspecs->specs[(int)ds_typedef] != 0;
4040 /* If a class, struct, or enum type is declared by the DECLSPECS
4041 (i.e, if a class-specifier, enum-specifier, or non-typename
4042 elaborated-type-specifier appears in the DECLSPECS),
4043 DECLARED_TYPE is set to the corresponding type. */
4044 tree declared_type = NULL_TREE;
4045 bool error_p = false;
4047 if (declspecs->multiple_types_p)
4048 error ("multiple types in one declaration");
4049 else if (declspecs->redefined_builtin_type)
4051 if (!in_system_header)
4052 permerror (input_location, "redeclaration of C++ built-in type %qT",
4053 declspecs->redefined_builtin_type);
4058 && TYPE_P (declspecs->type)
4059 && ((TREE_CODE (declspecs->type) != TYPENAME_TYPE
4060 && MAYBE_CLASS_TYPE_P (declspecs->type))
4061 || TREE_CODE (declspecs->type) == ENUMERAL_TYPE))
4062 declared_type = declspecs->type;
4063 else if (declspecs->type == error_mark_node)
4065 if (declared_type == NULL_TREE && ! saw_friend && !error_p)
4066 permerror (input_location, "declaration does not declare anything");
4067 /* Check for an anonymous union. */
4068 else if (declared_type && RECORD_OR_UNION_CODE_P (TREE_CODE (declared_type))
4069 && TYPE_ANONYMOUS_P (declared_type))
4071 /* 7/3 In a simple-declaration, the optional init-declarator-list
4072 can be omitted only when declaring a class (clause 9) or
4073 enumeration (7.2), that is, when the decl-specifier-seq contains
4074 either a class-specifier, an elaborated-type-specifier with
4075 a class-key (9.1), or an enum-specifier. In these cases and
4076 whenever a class-specifier or enum-specifier is present in the
4077 decl-specifier-seq, the identifiers in these specifiers are among
4078 the names being declared by the declaration (as class-name,
4079 enum-names, or enumerators, depending on the syntax). In such
4080 cases, and except for the declaration of an unnamed bit-field (9.6),
4081 the decl-specifier-seq shall introduce one or more names into the
4082 program, or shall redeclare a name introduced by a previous
4083 declaration. [Example:
4084 enum { }; // ill-formed
4085 typedef class { }; // ill-formed
4089 error ("missing type-name in typedef-declaration");
4092 /* Anonymous unions are objects, so they can have specifiers. */;
4093 SET_ANON_AGGR_TYPE_P (declared_type);
4095 if (TREE_CODE (declared_type) != UNION_TYPE && !in_system_header)
4096 pedwarn (input_location, OPT_pedantic, "ISO C++ prohibits anonymous structs");
4101 if (declspecs->specs[(int)ds_inline]
4102 || declspecs->specs[(int)ds_virtual])
4103 error ("%qs can only be specified for functions",
4104 declspecs->specs[(int)ds_inline]
4105 ? "inline" : "virtual");
4107 && (!current_class_type
4108 || current_scope () != current_class_type))
4109 error ("%<friend%> can only be specified inside a class");
4110 else if (declspecs->specs[(int)ds_explicit])
4111 error ("%<explicit%> can only be specified for constructors");
4112 else if (declspecs->storage_class)
4113 error ("a storage class can only be specified for objects "
4115 else if (declspecs->specs[(int)ds_const]
4116 || declspecs->specs[(int)ds_volatile]
4117 || declspecs->specs[(int)ds_restrict]
4118 || declspecs->specs[(int)ds_thread])
4119 error ("qualifiers can only be specified for objects "
4121 else if (saw_typedef)
4122 warning (0, "%<typedef%> was ignored in this declaration");
4123 else if (declspecs->specs[(int) ds_constexpr])
4124 error ("%<constexpr%> cannot be used for type declarations");
4127 return declared_type;
4130 /* Called when a declaration is seen that contains no names to declare.
4131 If its type is a reference to a structure, union or enum inherited
4132 from a containing scope, shadow that tag name for the current scope
4133 with a forward reference.
4134 If its type defines a new named structure or union
4135 or defines an enum, it is valid but we need not do anything here.
4136 Otherwise, it is an error.
4138 C++: may have to grok the declspecs to learn about static,
4139 complain for anonymous unions.
4141 Returns the TYPE declared -- or NULL_TREE if none. */
4144 shadow_tag (cp_decl_specifier_seq *declspecs)
4146 tree t = check_tag_decl (declspecs);
4151 if (declspecs->attributes)
4153 warning (0, "attribute ignored in declaration of %q+#T", t);
4154 warning (0, "attribute for %q+#T must follow the %qs keyword",
4155 t, class_key_or_enum_as_string (t));
4159 if (maybe_process_partial_specialization (t) == error_mark_node)
4162 /* This is where the variables in an anonymous union are
4163 declared. An anonymous union declaration looks like:
4165 because there is no declarator after the union, the parser
4166 sends that declaration here. */
4167 if (ANON_AGGR_TYPE_P (t))
4169 fixup_anonymous_aggr (t);
4171 if (TYPE_FIELDS (t))
4173 tree decl = grokdeclarator (/*declarator=*/NULL,
4174 declspecs, NORMAL, 0, NULL);
4175 finish_anon_union (decl);
4182 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
4185 groktypename (cp_decl_specifier_seq *type_specifiers,
4186 const cp_declarator *declarator,
4187 bool is_template_arg)
4191 enum decl_context context
4192 = is_template_arg ? TEMPLATE_TYPE_ARG : TYPENAME;
4193 attrs = type_specifiers->attributes;
4194 type_specifiers->attributes = NULL_TREE;
4195 type = grokdeclarator (declarator, type_specifiers, context, 0, &attrs);
4196 if (attrs && type != error_mark_node)
4198 if (CLASS_TYPE_P (type))
4199 warning (OPT_Wattributes, "ignoring attributes applied to class type %qT "
4200 "outside of definition", type);
4201 else if (MAYBE_CLASS_TYPE_P (type))
4202 /* A template type parameter or other dependent type. */
4203 warning (OPT_Wattributes, "ignoring attributes applied to dependent "
4204 "type %qT without an associated declaration", type);
4206 cplus_decl_attributes (&type, attrs, 0);
4211 /* Process a DECLARATOR for a function-scope variable declaration,
4212 namespace-scope variable declaration, or function declaration.
4213 (Function definitions go through start_function; class member
4214 declarations appearing in the body of the class go through
4215 grokfield.) The DECL corresponding to the DECLARATOR is returned.
4216 If an error occurs, the error_mark_node is returned instead.
4218 DECLSPECS are the decl-specifiers for the declaration. INITIALIZED is
4219 SD_INITIALIZED if an explicit initializer is present, or SD_DEFAULTED
4220 for an explicitly defaulted function, or SD_DELETED for an explicitly
4221 deleted function, but 0 (SD_UNINITIALIZED) if this is a variable
4222 implicitly initialized via a default constructor. ATTRIBUTES and
4223 PREFIX_ATTRIBUTES are GNU attributes associated with this declaration.
4224 *PUSHED_SCOPE_P is set to the scope entered in this function, if any; if
4225 set, the caller is responsible for calling pop_scope. */
4228 start_decl (const cp_declarator *declarator,
4229 cp_decl_specifier_seq *declspecs,
4232 tree prefix_attributes,
4233 tree *pushed_scope_p)
4241 *pushed_scope_p = NULL_TREE;
4243 /* An object declared as __attribute__((deprecated)) suppresses
4244 warnings of uses of other deprecated items. */
4245 if (lookup_attribute ("deprecated", attributes))
4246 deprecated_state = DEPRECATED_SUPPRESS;
4248 attributes = chainon (attributes, prefix_attributes);
4250 decl = grokdeclarator (declarator, declspecs, NORMAL, initialized,
4253 deprecated_state = DEPRECATED_NORMAL;
4255 if (decl == NULL_TREE || TREE_CODE (decl) == VOID_TYPE
4256 || decl == error_mark_node)
4257 return error_mark_node;
4259 context = CP_DECL_CONTEXT (decl);
4260 if (context != global_namespace)
4261 *pushed_scope_p = push_scope (context);
4264 /* Is it valid for this decl to have an initializer at all?
4265 If not, set INITIALIZED to zero, which will indirectly
4266 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
4267 switch (TREE_CODE (decl))
4270 error ("typedef %qD is initialized (use decltype instead)", decl);
4271 return error_mark_node;
4274 if (initialized == SD_DELETED)
4275 /* We'll handle the rest of the semantics later, but we need to
4276 set this now so it's visible to duplicate_decls. */
4277 DECL_DELETED_FN (decl) = 1;
4286 if (! toplevel_bindings_p ()
4287 && DECL_EXTERNAL (decl))
4288 warning (0, "declaration of %q#D has %<extern%> and is initialized",
4290 DECL_EXTERNAL (decl) = 0;
4291 if (toplevel_bindings_p ())
4292 TREE_STATIC (decl) = 1;
4294 alias = lookup_attribute ("alias", DECL_ATTRIBUTES (decl)) != 0;
4296 if (alias && TREE_CODE (decl) == FUNCTION_DECL)
4297 record_key_method_defined (decl);
4299 /* If this is a typedef that names the class for linkage purposes
4300 (7.1.3p8), apply any attributes directly to the type. */
4301 if (TREE_CODE (decl) == TYPE_DECL
4302 && TAGGED_TYPE_P (TREE_TYPE (decl))
4303 && decl == TYPE_NAME (TYPE_MAIN_VARIANT (TREE_TYPE (decl))))
4304 flags = ATTR_FLAG_TYPE_IN_PLACE;
4308 /* Set attributes here so if duplicate decl, will have proper attributes. */
4309 cplus_decl_attributes (&decl, attributes, flags);
4311 /* Dllimported symbols cannot be defined. Static data members (which
4312 can be initialized in-class and dllimported) go through grokfield,
4313 not here, so we don't need to exclude those decls when checking for
4315 if (initialized && DECL_DLLIMPORT_P (decl))
4317 error ("definition of %q#D is marked %<dllimport%>", decl);
4318 DECL_DLLIMPORT_P (decl) = 0;
4321 /* If #pragma weak was used, mark the decl weak now. */
4322 maybe_apply_pragma_weak (decl);
4324 if (TREE_CODE (decl) == FUNCTION_DECL
4325 && DECL_DECLARED_INLINE_P (decl)
4326 && DECL_UNINLINABLE (decl)
4327 && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl)))
4328 warning (0, "inline function %q+D given attribute noinline", decl);
4330 if (TYPE_P (context) && COMPLETE_TYPE_P (complete_type (context)))
4332 if (TREE_CODE (decl) == VAR_DECL)
4334 tree field = lookup_field (context, DECL_NAME (decl), 0, false);
4335 if (field == NULL_TREE || TREE_CODE (field) != VAR_DECL)
4336 error ("%q#D is not a static member of %q#T", decl, context);
4339 if (DECL_CONTEXT (field) != context)
4341 if (!same_type_p (DECL_CONTEXT (field), context))
4342 permerror (input_location, "ISO C++ does not permit %<%T::%D%> "
4343 "to be defined as %<%T::%D%>",
4344 DECL_CONTEXT (field), DECL_NAME (decl),
4345 context, DECL_NAME (decl));
4346 DECL_CONTEXT (decl) = DECL_CONTEXT (field);
4348 if (processing_specialization
4349 && template_class_depth (context) == 0
4350 && CLASSTYPE_TEMPLATE_SPECIALIZATION (context))
4351 error ("template header not allowed in member definition "
4352 "of explicitly specialized class");
4353 /* Static data member are tricky; an in-class initialization
4354 still doesn't provide a definition, so the in-class
4355 declaration will have DECL_EXTERNAL set, but will have an
4356 initialization. Thus, duplicate_decls won't warn
4357 about this situation, and so we check here. */
4358 if (initialized && DECL_INITIALIZED_IN_CLASS_P (field))
4359 error ("duplicate initialization of %qD", decl);
4360 if (duplicate_decls (decl, field, /*newdecl_is_friend=*/false))
4362 if (declspecs->specs[(int) ds_constexpr]
4363 && !DECL_DECLARED_CONSTEXPR_P (field))
4364 error ("%qD declared %<constexpr%> outside its class", field);
4369 tree field = check_classfn (context, decl,
4370 (processing_template_decl
4371 > template_class_depth (context))
4372 ? current_template_parms
4374 if (field && field != error_mark_node
4375 && duplicate_decls (decl, field,
4376 /*newdecl_is_friend=*/false))
4380 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
4381 DECL_IN_AGGR_P (decl) = 0;
4382 /* Do not mark DECL as an explicit specialization if it was not
4383 already marked as an instantiation; a declaration should
4384 never be marked as a specialization unless we know what
4385 template is being specialized. */
4386 if (DECL_LANG_SPECIFIC (decl) && DECL_USE_TEMPLATE (decl))
4388 SET_DECL_TEMPLATE_SPECIALIZATION (decl);
4390 /* [temp.expl.spec] An explicit specialization of a static data
4391 member of a template is a definition if the declaration
4392 includes an initializer; otherwise, it is a declaration.
4394 We check for processing_specialization so this only applies
4395 to the new specialization syntax. */
4396 if (!initialized && processing_specialization)
4397 DECL_EXTERNAL (decl) = 1;
4400 if (DECL_EXTERNAL (decl) && ! DECL_TEMPLATE_SPECIALIZATION (decl)
4401 /* Aliases are definitions. */
4403 permerror (input_location, "declaration of %q#D outside of class is not definition",
4407 was_public = TREE_PUBLIC (decl);
4409 /* Enter this declaration into the symbol table. */
4410 decl = maybe_push_decl (decl);
4412 if (processing_template_decl)
4413 decl = push_template_decl (decl);
4414 if (decl == error_mark_node)
4415 return error_mark_node;
4417 /* Tell the back end to use or not use .common as appropriate. If we say
4418 -fconserve-space, we want this to save .data space, at the expense of
4419 wrong semantics. If we say -fno-conserve-space, we want this to
4420 produce errors about redefs; to do this we force variables into the
4422 if (flag_conserve_space
4423 && TREE_CODE (decl) == VAR_DECL
4424 && TREE_PUBLIC (decl)
4425 && !DECL_THREAD_LOCAL_P (decl)
4426 && !have_global_bss_p ())
4427 DECL_COMMON (decl) = 1;
4429 if (TREE_CODE (decl) == VAR_DECL
4430 && DECL_NAMESPACE_SCOPE_P (decl) && !TREE_PUBLIC (decl) && !was_public
4431 && !DECL_THIS_STATIC (decl) && !DECL_ARTIFICIAL (decl))
4433 /* This is a const variable with implicit 'static'. Set
4434 DECL_THIS_STATIC so we can tell it from variables that are
4435 !TREE_PUBLIC because of the anonymous namespace. */
4436 gcc_assert (CP_TYPE_CONST_P (TREE_TYPE (decl)) || errorcount);
4437 DECL_THIS_STATIC (decl) = 1;
4440 if (!processing_template_decl && TREE_CODE (decl) == VAR_DECL)
4441 start_decl_1 (decl, initialized);
4446 /* Process the declaration of a variable DECL. INITIALIZED is true
4447 iff DECL is explicitly initialized. (INITIALIZED is false if the
4448 variable is initialized via an implicitly-called constructor.)
4449 This function must be called for ordinary variables (including, for
4450 example, implicit instantiations of templates), but must not be
4451 called for template declarations. */
4454 start_decl_1 (tree decl, bool initialized)
4458 bool aggregate_definition_p;
4460 gcc_assert (!processing_template_decl);
4462 if (error_operand_p (decl))
4465 gcc_assert (TREE_CODE (decl) == VAR_DECL);
4467 type = TREE_TYPE (decl);
4468 complete_p = COMPLETE_TYPE_P (type);
4469 aggregate_definition_p = MAYBE_CLASS_TYPE_P (type) && !DECL_EXTERNAL (decl);
4471 /* If an explicit initializer is present, or if this is a definition
4472 of an aggregate, then we need a complete type at this point.
4473 (Scalars are always complete types, so there is nothing to
4474 check.) This code just sets COMPLETE_P; errors (if necessary)
4475 are issued below. */
4476 if ((initialized || aggregate_definition_p)
4478 && COMPLETE_TYPE_P (complete_type (type)))
4481 /* We will not yet have set TREE_READONLY on DECL if the type
4482 was "const", but incomplete, before this point. But, now, we
4483 have a complete type, so we can try again. */
4484 cp_apply_type_quals_to_decl (cp_type_quals (type), decl);
4488 /* Is it valid for this decl to have an initializer at all? */
4490 /* Don't allow initializations for incomplete types except for
4491 arrays which might be completed by the initialization. */
4493 ; /* A complete type is ok. */
4494 else if (type_uses_auto (type))
4495 ; /* An auto type is ok. */
4496 else if (TREE_CODE (type) != ARRAY_TYPE)
4498 error ("variable %q#D has initializer but incomplete type", decl);
4499 type = TREE_TYPE (decl) = error_mark_node;
4501 else if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (type))))
4503 if (DECL_LANG_SPECIFIC (decl) && DECL_TEMPLATE_INFO (decl))
4504 error ("elements of array %q#D have incomplete type", decl);
4505 /* else we already gave an error in start_decl. */
4508 else if (aggregate_definition_p && !complete_p)
4510 if (type_uses_auto (type))
4511 error ("declaration of %q#D has no initializer", decl);
4513 error ("aggregate %q#D has incomplete type and cannot be defined",
4515 /* Change the type so that assemble_variable will give
4516 DECL an rtl we can live with: (mem (const_int 0)). */
4517 type = TREE_TYPE (decl) = error_mark_node;
4520 /* Create a new scope to hold this declaration if necessary.
4521 Whether or not a new scope is necessary cannot be determined
4522 until after the type has been completed; if the type is a
4523 specialization of a class template it is not until after
4524 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
4525 will be set correctly. */
4526 maybe_push_cleanup_level (type);
4529 /* Handle initialization of references. DECL, TYPE, and INIT have the
4530 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
4531 but will be set to a new CLEANUP_STMT if a temporary is created
4532 that must be destroyed subsequently.
4534 Returns an initializer expression to use to initialize DECL, or
4535 NULL if the initialization can be performed statically.
4537 Quotes on semantics can be found in ARM 8.4.3. */
4540 grok_reference_init (tree decl, tree type, tree init, tree *cleanup)
4544 if (init == NULL_TREE)
4546 if ((DECL_LANG_SPECIFIC (decl) == 0
4547 || DECL_IN_AGGR_P (decl) == 0)
4548 && ! DECL_THIS_EXTERN (decl))
4549 error ("%qD declared as reference but not initialized", decl);
4553 if (TREE_CODE (init) == TREE_LIST)
4554 init = build_x_compound_expr_from_list (init, ELK_INIT,
4555 tf_warning_or_error);
4557 if (TREE_CODE (TREE_TYPE (type)) != ARRAY_TYPE
4558 && TREE_CODE (TREE_TYPE (init)) == ARRAY_TYPE)
4559 /* Note: default conversion is only called in very special cases. */
4560 init = decay_conversion (init);
4562 /* Convert INIT to the reference type TYPE. This may involve the
4563 creation of a temporary, whose lifetime must be the same as that
4564 of the reference. If so, a DECL_EXPR for the temporary will be
4565 added just after the DECL_EXPR for DECL. That's why we don't set
4566 DECL_INITIAL for local references (instead assigning to them
4567 explicitly); we need to allow the temporary to be initialized
4569 tmp = initialize_reference (type, init, decl, cleanup, tf_warning_or_error);
4571 if (tmp == error_mark_node)
4573 else if (tmp == NULL_TREE)
4575 error ("cannot initialize %qT from %qT", type, TREE_TYPE (init));
4579 if (TREE_STATIC (decl) && !TREE_CONSTANT (tmp))
4582 DECL_INITIAL (decl) = tmp;
4587 /* Subroutine of check_initializer. We're initializing a DECL of
4588 std::initializer_list<T> TYPE from a braced-init-list INIT, and need to
4589 extend the lifetime of the underlying array to match that of the decl,
4590 just like for reference initialization. CLEANUP is as for
4591 grok_reference_init. */
4594 build_init_list_var_init (tree decl, tree type, tree init, tree *array_init,
4597 tree aggr_init, array, arrtype;
4598 init = perform_implicit_conversion (type, init, tf_warning_or_error);
4599 if (error_operand_p (init))
4600 return error_mark_node;
4602 aggr_init = TARGET_EXPR_INITIAL (init);
4603 array = CONSTRUCTOR_ELT (aggr_init, 0)->value;
4604 arrtype = TREE_TYPE (array);
4606 gcc_assert (TREE_CODE (array) == ADDR_EXPR);
4607 array = TREE_OPERAND (array, 0);
4608 /* If the array is constant, finish_compound_literal already made it a
4609 static variable and we don't need to do anything here. */
4610 if (decl && TREE_CODE (array) == TARGET_EXPR)
4612 tree var = set_up_extended_ref_temp (decl, array, cleanup, array_init);
4613 var = build_address (var);
4614 var = convert (arrtype, var);
4615 CONSTRUCTOR_ELT (aggr_init, 0)->value = var;
4620 /* Designated initializers in arrays are not supported in GNU C++.
4621 The parser cannot detect this error since it does not know whether
4622 a given brace-enclosed initializer is for a class type or for an
4623 array. This function checks that CE does not use a designated
4624 initializer. If it does, an error is issued. Returns true if CE
4625 is valid, i.e., does not have a designated initializer. */
4628 check_array_designated_initializer (const constructor_elt *ce)
4630 /* Designated initializers for array elements are not supported. */
4633 /* The parser only allows identifiers as designated
4635 if (ce->index == error_mark_node)
4636 error ("name used in a GNU-style designated "
4637 "initializer for an array");
4638 else if (TREE_CODE (ce->index) == INTEGER_CST)
4639 /* An index added by reshape_init. */
4643 gcc_assert (TREE_CODE (ce->index) == IDENTIFIER_NODE);
4644 error ("name %qD used in a GNU-style designated "
4645 "initializer for an array", ce->index);
4653 /* When parsing `int a[] = {1, 2};' we don't know the size of the
4654 array until we finish parsing the initializer. If that's the
4655 situation we're in, update DECL accordingly. */
4658 maybe_deduce_size_from_array_init (tree decl, tree init)
4660 tree type = TREE_TYPE (decl);
4662 if (TREE_CODE (type) == ARRAY_TYPE
4663 && TYPE_DOMAIN (type) == NULL_TREE
4664 && TREE_CODE (decl) != TYPE_DECL)
4666 /* do_default is really a C-ism to deal with tentative definitions.
4667 But let's leave it here to ease the eventual merge. */
4668 int do_default = !DECL_EXTERNAL (decl);
4669 tree initializer = init ? init : DECL_INITIAL (decl);
4672 /* Check that there are no designated initializers in INIT, as
4673 those are not supported in GNU C++, and as the middle-end
4674 will crash if presented with a non-numeric designated
4676 if (initializer && TREE_CODE (initializer) == CONSTRUCTOR)
4678 VEC(constructor_elt,gc) *v = CONSTRUCTOR_ELTS (initializer);
4679 constructor_elt *ce;
4681 FOR_EACH_VEC_ELT (constructor_elt, v, i, ce)
4682 if (!check_array_designated_initializer (ce))
4688 failure = cp_complete_array_type (&TREE_TYPE (decl), initializer,
4692 error ("initializer fails to determine size of %qD", decl);
4693 TREE_TYPE (decl) = error_mark_node;
4695 else if (failure == 2)
4699 error ("array size missing in %qD", decl);
4700 TREE_TYPE (decl) = error_mark_node;
4702 /* If a `static' var's size isn't known, make it extern as
4703 well as static, so it does not get allocated. If it's not
4704 `static', then don't mark it extern; finish_incomplete_decl
4705 will give it a default size and it will get allocated. */
4706 else if (!pedantic && TREE_STATIC (decl) && !TREE_PUBLIC (decl))
4707 DECL_EXTERNAL (decl) = 1;
4709 else if (failure == 3)
4711 error ("zero-size array %qD", decl);
4712 TREE_TYPE (decl) = error_mark_node;
4716 cp_apply_type_quals_to_decl (cp_type_quals (TREE_TYPE (decl)), decl);
4718 relayout_decl (decl);
4722 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
4723 any appropriate error messages regarding the layout. */
4726 layout_var_decl (tree decl)
4730 type = TREE_TYPE (decl);
4731 if (type == error_mark_node)
4734 /* If we haven't already layed out this declaration, do so now.
4735 Note that we must not call complete type for an external object
4736 because it's type might involve templates that we are not
4737 supposed to instantiate yet. (And it's perfectly valid to say
4738 `extern X x' for some incomplete type `X'.) */
4739 if (!DECL_EXTERNAL (decl))
4740 complete_type (type);
4741 if (!DECL_SIZE (decl)
4742 && TREE_TYPE (decl) != error_mark_node
4743 && (COMPLETE_TYPE_P (type)
4744 || (TREE_CODE (type) == ARRAY_TYPE
4745 && !TYPE_DOMAIN (type)
4746 && COMPLETE_TYPE_P (TREE_TYPE (type)))))
4747 layout_decl (decl, 0);
4749 if (!DECL_EXTERNAL (decl) && DECL_SIZE (decl) == NULL_TREE)
4751 /* An automatic variable with an incomplete type: that is an error.
4752 Don't talk about array types here, since we took care of that
4753 message in grokdeclarator. */
4754 error ("storage size of %qD isn%'t known", decl);
4755 TREE_TYPE (decl) = error_mark_node;
4758 /* Keep this code around in case we later want to control debug info
4759 based on whether a type is "used". (jason 1999-11-11) */
4761 else if (!DECL_EXTERNAL (decl) && MAYBE_CLASS_TYPE_P (ttype))
4762 /* Let debugger know it should output info for this type. */
4763 note_debug_info_needed (ttype);
4765 if (TREE_STATIC (decl) && DECL_CLASS_SCOPE_P (decl))
4766 note_debug_info_needed (DECL_CONTEXT (decl));
4769 if ((DECL_EXTERNAL (decl) || TREE_STATIC (decl))
4770 && DECL_SIZE (decl) != NULL_TREE
4771 && ! TREE_CONSTANT (DECL_SIZE (decl)))
4773 if (TREE_CODE (DECL_SIZE (decl)) == INTEGER_CST)
4774 constant_expression_warning (DECL_SIZE (decl));
4777 error ("storage size of %qD isn%'t constant", decl);
4778 TREE_TYPE (decl) = error_mark_node;
4783 /* If a local static variable is declared in an inline function, or if
4784 we have a weak definition, we must endeavor to create only one
4785 instance of the variable at link-time. */
4788 maybe_commonize_var (tree decl)
4790 /* Static data in a function with comdat linkage also has comdat
4792 if (TREE_STATIC (decl)
4793 /* Don't mess with __FUNCTION__. */
4794 && ! DECL_ARTIFICIAL (decl)
4795 && DECL_FUNCTION_SCOPE_P (decl)
4796 && vague_linkage_p (DECL_CONTEXT (decl)))
4800 /* With weak symbols, we simply make the variable COMDAT;
4801 that will cause copies in multiple translations units to
4803 comdat_linkage (decl);
4807 if (DECL_INITIAL (decl) == NULL_TREE
4808 || DECL_INITIAL (decl) == error_mark_node)
4810 /* Without weak symbols, we can use COMMON to merge
4811 uninitialized variables. */
4812 TREE_PUBLIC (decl) = 1;
4813 DECL_COMMON (decl) = 1;
4817 /* While for initialized variables, we must use internal
4818 linkage -- which means that multiple copies will not
4820 TREE_PUBLIC (decl) = 0;
4821 DECL_COMMON (decl) = 0;
4822 warning_at (input_location, 0,
4823 "sorry: semantics of inline function static "
4824 "data %q+#D are wrong (you%'ll wind up "
4825 "with multiple copies)", decl);
4826 warning_at (DECL_SOURCE_LOCATION (decl), 0,
4827 " you can work around this by removing "
4832 else if (DECL_LANG_SPECIFIC (decl) && DECL_COMDAT (decl))
4833 /* Set it up again; we might have set DECL_INITIAL since the last
4835 comdat_linkage (decl);
4838 /* Issue an error message if DECL is an uninitialized const variable. */
4841 check_for_uninitialized_const_var (tree decl)
4843 tree type = strip_array_types (TREE_TYPE (decl));
4845 /* ``Unless explicitly declared extern, a const object does not have
4846 external linkage and must be initialized. ($8.4; $12.1)'' ARM
4848 if (TREE_CODE (decl) == VAR_DECL
4849 && TREE_CODE (type) != REFERENCE_TYPE
4850 && CP_TYPE_CONST_P (type)
4851 && (!TYPE_NEEDS_CONSTRUCTING (type)
4852 || !type_has_user_provided_default_constructor (type))
4853 && !DECL_INITIAL (decl))
4855 permerror (DECL_SOURCE_LOCATION (decl),
4856 "uninitialized const %qD", decl);
4858 if (CLASS_TYPE_P (type)
4859 && !type_has_user_provided_default_constructor (type))
4861 tree defaulted_ctor;
4863 inform (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (type)),
4864 "%q#T has no user-provided default constructor", type);
4865 defaulted_ctor = in_class_defaulted_default_constructor (type);
4867 inform (DECL_SOURCE_LOCATION (defaulted_ctor),
4868 "constructor is not user-provided because it is "
4869 "explicitly defaulted in the class body");
4874 /* Structure holding the current initializer being processed by reshape_init.
4875 CUR is a pointer to the current element being processed, END is a pointer
4876 after the last element present in the initializer. */
4877 typedef struct reshape_iterator_t
4879 constructor_elt *cur;
4880 constructor_elt *end;
4883 static tree reshape_init_r (tree, reshape_iter *, bool, tsubst_flags_t);
4885 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
4886 returned is the next FIELD_DECL (possibly FIELD itself) that can be
4887 initialized. If there are no more such fields, the return value
4891 next_initializable_field (tree field)
4894 && (TREE_CODE (field) != FIELD_DECL
4895 || (DECL_C_BIT_FIELD (field) && !DECL_NAME (field))
4896 || DECL_ARTIFICIAL (field)))
4897 field = DECL_CHAIN (field);
4902 /* Subroutine of reshape_init_array and reshape_init_vector, which does
4903 the actual work. ELT_TYPE is the element type of the array. MAX_INDEX is an
4904 INTEGER_CST representing the size of the array minus one (the maximum index),
4905 or NULL_TREE if the array was declared without specifying the size. D is
4906 the iterator within the constructor. */
4909 reshape_init_array_1 (tree elt_type, tree max_index, reshape_iter *d,
4910 tsubst_flags_t complain)
4913 bool sized_array_p = (max_index != NULL_TREE);
4914 unsigned HOST_WIDE_INT max_index_cst = 0;
4915 unsigned HOST_WIDE_INT index;
4917 /* The initializer for an array is always a CONSTRUCTOR. */
4918 new_init = build_constructor (init_list_type_node, NULL);
4922 /* Minus 1 is used for zero sized arrays. */
4923 if (integer_all_onesp (max_index))
4926 if (host_integerp (max_index, 1))
4927 max_index_cst = tree_low_cst (max_index, 1);
4928 /* sizetype is sign extended, not zero extended. */
4930 max_index_cst = tree_low_cst (fold_convert (size_type_node, max_index),
4934 /* Loop until there are no more initializers. */
4936 d->cur != d->end && (!sized_array_p || index <= max_index_cst);
4941 check_array_designated_initializer (d->cur);
4942 elt_init = reshape_init_r (elt_type, d, /*first_initializer_p=*/false,
4944 if (elt_init == error_mark_node)
4945 return error_mark_node;
4946 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init),
4947 size_int (index), elt_init);
4948 if (!TREE_CONSTANT (elt_init))
4949 TREE_CONSTANT (new_init) = false;
4955 /* Subroutine of reshape_init_r, processes the initializers for arrays.
4956 Parameters are the same of reshape_init_r. */
4959 reshape_init_array (tree type, reshape_iter *d, tsubst_flags_t complain)
4961 tree max_index = NULL_TREE;
4963 gcc_assert (TREE_CODE (type) == ARRAY_TYPE);
4965 if (TYPE_DOMAIN (type))
4966 max_index = array_type_nelts (type);
4968 return reshape_init_array_1 (TREE_TYPE (type), max_index, d, complain);
4971 /* Subroutine of reshape_init_r, processes the initializers for vectors.
4972 Parameters are the same of reshape_init_r. */
4975 reshape_init_vector (tree type, reshape_iter *d, tsubst_flags_t complain)
4977 tree max_index = NULL_TREE;
4979 gcc_assert (TREE_CODE (type) == VECTOR_TYPE);
4981 if (COMPOUND_LITERAL_P (d->cur->value))
4983 tree value = d->cur->value;
4984 if (!same_type_p (TREE_TYPE (value), type))
4986 if (complain & tf_error)
4987 error ("invalid type %qT as initializer for a vector of type %qT",
4988 TREE_TYPE (d->cur->value), type);
4989 value = error_mark_node;
4995 /* For a vector, we initialize it as an array of the appropriate size. */
4996 if (TREE_CODE (type) == VECTOR_TYPE)
4997 max_index = size_int (TYPE_VECTOR_SUBPARTS (type) - 1);
4999 return reshape_init_array_1 (TREE_TYPE (type), max_index, d, complain);
5002 /* Subroutine of reshape_init_r, processes the initializers for classes
5003 or union. Parameters are the same of reshape_init_r. */
5006 reshape_init_class (tree type, reshape_iter *d, bool first_initializer_p,
5007 tsubst_flags_t complain)
5012 gcc_assert (CLASS_TYPE_P (type));
5014 /* The initializer for a class is always a CONSTRUCTOR. */
5015 new_init = build_constructor (init_list_type_node, NULL);
5016 field = next_initializable_field (TYPE_FIELDS (type));
5022 An initializer for an aggregate member that is an
5023 empty class shall have the form of an empty
5024 initializer-list {}. */
5025 if (!first_initializer_p)
5027 if (complain & tf_error)
5028 error ("initializer for %qT must be brace-enclosed", type);
5029 return error_mark_node;
5034 /* Loop through the initializable fields, gathering initializers. */
5035 while (d->cur != d->end)
5039 /* Handle designated initializers, as an extension. */
5042 field = lookup_field_1 (type, d->cur->index, /*want_type=*/false);
5044 if (!field || TREE_CODE (field) != FIELD_DECL)
5046 if (complain & tf_error)
5047 error ("%qT has no non-static data member named %qD", type,
5049 return error_mark_node;
5053 /* If we processed all the member of the class, we are done. */
5057 field_init = reshape_init_r (TREE_TYPE (field), d,
5058 /*first_initializer_p=*/false, complain);
5059 if (field_init == error_mark_node)
5060 return error_mark_node;
5062 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init), field, field_init);
5066 When a union is initialized with a brace-enclosed
5067 initializer, the braces shall only contain an
5068 initializer for the first member of the union. */
5069 if (TREE_CODE (type) == UNION_TYPE)
5072 field = next_initializable_field (DECL_CHAIN (field));
5078 /* Subroutine of reshape_init, which processes a single initializer (part of
5079 a CONSTRUCTOR). TYPE is the type of the variable being initialized, D is the
5080 iterator within the CONSTRUCTOR which points to the initializer to process.
5081 FIRST_INITIALIZER_P is true if this is the first initializer of the
5082 outermost CONSTRUCTOR node. */
5085 reshape_init_r (tree type, reshape_iter *d, bool first_initializer_p,
5086 tsubst_flags_t complain)
5088 tree init = d->cur->value;
5090 if (error_operand_p (init))
5091 return error_mark_node;
5093 if (TREE_CODE (type) == COMPLEX_TYPE)
5095 /* A complex type can be initialized from one or two initializers,
5096 but braces are not elided. */
5098 if (BRACE_ENCLOSED_INITIALIZER_P (init))
5100 if (CONSTRUCTOR_NELTS (init) > 2)
5102 if (complain & tf_error)
5103 error ("too many initializers for %qT", type);
5105 return error_mark_node;
5108 else if (first_initializer_p && d->cur != d->end)
5110 VEC(constructor_elt, gc) *v = 0;
5111 CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, init);
5112 CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, d->cur->value);
5114 init = build_constructor (init_list_type_node, v);
5119 /* A non-aggregate type is always initialized with a single
5121 if (!CP_AGGREGATE_TYPE_P (type))
5123 /* It is invalid to initialize a non-aggregate type with a
5124 brace-enclosed initializer before C++0x.
5125 We need to check for BRACE_ENCLOSED_INITIALIZER_P here because
5126 of g++.old-deja/g++.mike/p7626.C: a pointer-to-member constant is
5127 a CONSTRUCTOR (with a record type). */
5128 if (TREE_CODE (init) == CONSTRUCTOR
5129 && BRACE_ENCLOSED_INITIALIZER_P (init)) /* p7626.C */
5131 if (SCALAR_TYPE_P (type))
5133 if (complain & tf_error)
5134 error ("braces around scalar initializer for type %qT", type);
5135 init = error_mark_node;
5138 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS);
5147 All implicit type conversions (clause _conv_) are considered when
5148 initializing the aggregate member with an initializer from an
5149 initializer-list. If the initializer can initialize a member,
5150 the member is initialized. Otherwise, if the member is itself a
5151 non-empty subaggregate, brace elision is assumed and the
5152 initializer is considered for the initialization of the first
5153 member of the subaggregate. */
5154 if (TREE_CODE (init) != CONSTRUCTOR
5155 /* But don't try this for the first initializer, since that would be
5156 looking through the outermost braces; A a2 = { a1 }; is not a
5157 valid aggregate initialization. */
5158 && !first_initializer_p
5159 && (same_type_ignoring_top_level_qualifiers_p (type, TREE_TYPE (init))
5160 || can_convert_arg (type, TREE_TYPE (init), init, LOOKUP_NORMAL)))
5166 /* [dcl.init.string]
5168 A char array (whether plain char, signed char, or unsigned char)
5169 can be initialized by a string-literal (optionally enclosed in
5170 braces); a wchar_t array can be initialized by a wide
5171 string-literal (optionally enclosed in braces). */
5172 if (TREE_CODE (type) == ARRAY_TYPE
5173 && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type))))
5175 tree str_init = init;
5177 /* Strip one level of braces if and only if they enclose a single
5178 element (as allowed by [dcl.init.string]). */
5179 if (!first_initializer_p
5180 && TREE_CODE (str_init) == CONSTRUCTOR
5181 && VEC_length (constructor_elt, CONSTRUCTOR_ELTS (str_init)) == 1)
5183 str_init = VEC_index (constructor_elt,
5184 CONSTRUCTOR_ELTS (str_init), 0)->value;
5187 /* If it's a string literal, then it's the initializer for the array
5188 as a whole. Otherwise, continue with normal initialization for
5189 array types (one value per array element). */
5190 if (TREE_CODE (str_init) == STRING_CST)
5197 /* The following cases are about aggregates. If we are not within a full
5198 initializer already, and there is not a CONSTRUCTOR, it means that there
5199 is a missing set of braces (that is, we are processing the case for
5200 which reshape_init exists). */
5201 if (!first_initializer_p)
5203 if (TREE_CODE (init) == CONSTRUCTOR)
5205 if (TREE_TYPE (init) && TYPE_PTRMEMFUNC_P (TREE_TYPE (init)))
5206 /* There is no need to reshape pointer-to-member function
5207 initializers, as they are always constructed correctly
5208 by the front end. */
5210 else if (COMPOUND_LITERAL_P (init))
5211 /* For a nested compound literal, there is no need to reshape since
5212 brace elision is not allowed. Even if we decided to allow it,
5213 we should add a call to reshape_init in finish_compound_literal,
5214 before calling digest_init, so changing this code would still
5215 not be necessary. */
5216 gcc_assert (!BRACE_ENCLOSED_INITIALIZER_P (init));
5220 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init));
5221 return reshape_init (type, init, complain);
5225 warning (OPT_Wmissing_braces, "missing braces around initializer for %qT",
5229 /* Dispatch to specialized routines. */
5230 if (CLASS_TYPE_P (type))
5231 return reshape_init_class (type, d, first_initializer_p, complain);
5232 else if (TREE_CODE (type) == ARRAY_TYPE)
5233 return reshape_init_array (type, d, complain);
5234 else if (TREE_CODE (type) == VECTOR_TYPE)
5235 return reshape_init_vector (type, d, complain);
5240 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
5241 brace-enclosed aggregate initializer.
5243 INIT is the CONSTRUCTOR containing the list of initializers describing
5244 a brace-enclosed initializer for an entity of the indicated aggregate TYPE.
5245 It may not presently match the shape of the TYPE; for example:
5247 struct S { int a; int b; };
5248 struct S a[] = { 1, 2, 3, 4 };
5250 Here INIT will hold a VEC of four elements, rather than a
5251 VEC of two elements, each itself a VEC of two elements. This
5252 routine transforms INIT from the former form into the latter. The
5253 revised CONSTRUCTOR node is returned. */
5256 reshape_init (tree type, tree init, tsubst_flags_t complain)
5258 VEC(constructor_elt, gc) *v;
5262 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init));
5264 v = CONSTRUCTOR_ELTS (init);
5266 /* An empty constructor does not need reshaping, and it is always a valid
5268 if (VEC_empty (constructor_elt, v))
5271 /* Recurse on this CONSTRUCTOR. */
5272 d.cur = VEC_index (constructor_elt, v, 0);
5273 d.end = d.cur + VEC_length (constructor_elt, v);
5275 new_init = reshape_init_r (type, &d, true, complain);
5276 if (new_init == error_mark_node)
5277 return error_mark_node;
5279 /* Make sure all the element of the constructor were used. Otherwise,
5280 issue an error about exceeding initializers. */
5283 if (complain & tf_error)
5284 error ("too many initializers for %qT", type);
5286 return error_mark_node;
5292 /* Verify array initializer. Returns true if errors have been reported. */
5295 check_array_initializer (tree decl, tree type, tree init)
5297 tree element_type = TREE_TYPE (type);
5299 /* The array type itself need not be complete, because the
5300 initializer may tell us how many elements are in the array.
5301 But, the elements of the array must be complete. */
5302 if (!COMPLETE_TYPE_P (complete_type (element_type)))
5305 error ("elements of array %q#D have incomplete type", decl);
5307 error ("elements of array %q#T have incomplete type", type);
5310 /* It is not valid to initialize a VLA. */
5312 && ((COMPLETE_TYPE_P (type) && !TREE_CONSTANT (TYPE_SIZE (type)))
5313 || !TREE_CONSTANT (TYPE_SIZE (element_type))))
5316 error ("variable-sized object %qD may not be initialized", decl);
5318 error ("variable-sized compound literal");
5324 /* Subroutine of check_initializer; args are passed down from that function.
5325 Set stmts_are_full_exprs_p to 1 across a call to build_aggr_init. */
5328 build_aggr_init_full_exprs (tree decl, tree init, int flags)
5331 int saved_stmts_are_full_exprs_p = 0;
5332 if (building_stmt_tree ())
5334 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
5335 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
5337 init = build_aggr_init (decl, init, flags, tf_warning_or_error);
5338 if (building_stmt_tree ())
5339 current_stmt_tree ()->stmts_are_full_exprs_p =
5340 saved_stmts_are_full_exprs_p;
5344 /* Verify INIT (the initializer for DECL), and record the
5345 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
5346 grok_reference_init.
5348 If the return value is non-NULL, it is an expression that must be
5349 evaluated dynamically to initialize DECL. */
5352 check_initializer (tree decl, tree init, int flags, tree *cleanup)
5354 tree type = TREE_TYPE (decl);
5355 tree init_code = NULL;
5356 tree extra_init = NULL_TREE;
5359 /* Things that are going to be initialized need to have complete
5361 TREE_TYPE (decl) = type = complete_type (TREE_TYPE (decl));
5363 if (type == error_mark_node)
5364 /* We will have already complained. */
5367 if (TREE_CODE (type) == ARRAY_TYPE)
5369 if (check_array_initializer (decl, type, init))
5372 else if (!COMPLETE_TYPE_P (type))
5374 error ("%qD has incomplete type", decl);
5375 TREE_TYPE (decl) = error_mark_node;
5379 /* There is no way to make a variable-sized class type in GNU C++. */
5380 gcc_assert (TREE_CONSTANT (TYPE_SIZE (type)));
5382 if (init && BRACE_ENCLOSED_INITIALIZER_P (init))
5384 int init_len = VEC_length (constructor_elt, CONSTRUCTOR_ELTS (init));
5385 if (SCALAR_TYPE_P (type))
5389 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS);
5390 init = build_zero_init (type, NULL_TREE, false);
5392 else if (init_len != 1 && TREE_CODE (type) != COMPLEX_TYPE)
5394 error ("scalar object %qD requires one element in initializer",
5396 TREE_TYPE (decl) = error_mark_node;
5402 if (TREE_CODE (decl) == CONST_DECL)
5404 gcc_assert (TREE_CODE (type) != REFERENCE_TYPE);
5406 DECL_INITIAL (decl) = init;
5408 gcc_assert (init != NULL_TREE);
5411 else if (!init && DECL_REALLY_EXTERN (decl))
5413 else if (TREE_CODE (type) == REFERENCE_TYPE)
5414 init = grok_reference_init (decl, type, init, cleanup);
5415 else if (init || type_build_ctor_call (type))
5418 check_for_uninitialized_const_var (decl);
5419 /* Do not reshape constructors of vectors (they don't need to be
5421 else if (BRACE_ENCLOSED_INITIALIZER_P (init))
5423 if (is_std_init_list (type))
5424 init = build_init_list_var_init (decl, type, init,
5425 &extra_init, cleanup);
5426 else if (TYPE_NON_AGGREGATE_CLASS (type))
5428 /* Don't reshape if the class has constructors. */
5429 if (cxx_dialect == cxx98)
5430 error ("in C++98 %qD must be initialized by constructor, "
5434 else if (TREE_CODE (type) == VECTOR_TYPE && TYPE_VECTOR_OPAQUE (type))
5436 error ("opaque vector types cannot be initialized");
5437 init = error_mark_node;
5440 init = reshape_init (type, init, tf_warning_or_error);
5443 /* If DECL has an array type without a specific bound, deduce the
5444 array size from the initializer. */
5445 maybe_deduce_size_from_array_init (decl, init);
5446 type = TREE_TYPE (decl);
5447 if (type == error_mark_node)
5450 if (type_build_ctor_call (type)
5451 || (CLASS_TYPE_P (type)
5452 && !(init && BRACE_ENCLOSED_INITIALIZER_P (init))))
5454 init_code = build_aggr_init_full_exprs (decl, init, flags);
5456 /* If this is a constexpr initializer, expand_default_init will
5457 have returned an INIT_EXPR rather than a CALL_EXPR. In that
5458 case, pull the initializer back out and pass it down into
5459 store_init_value. */
5460 while (TREE_CODE (init_code) == EXPR_STMT
5461 || TREE_CODE (init_code) == CONVERT_EXPR)
5462 init_code = TREE_OPERAND (init_code, 0);
5463 if (TREE_CODE (init_code) == INIT_EXPR)
5465 init = TREE_OPERAND (init_code, 1);
5466 init_code = NULL_TREE;
5467 /* Don't call digest_init; it's unnecessary and will complain
5468 about aggregate initialization of non-aggregate classes. */
5469 flags |= LOOKUP_ALREADY_DIGESTED;
5471 else if (DECL_DECLARED_CONSTEXPR_P (decl))
5473 /* Declared constexpr, but no suitable initializer; massage
5474 init appropriately so we can pass it into store_init_value
5476 if (init && BRACE_ENCLOSED_INITIALIZER_P (init))
5477 init = finish_compound_literal (type, init,
5478 tf_warning_or_error);
5479 else if (CLASS_TYPE_P (type)
5480 && (!init || TREE_CODE (init) == TREE_LIST))
5482 init = build_functional_cast (type, init, tf_none);
5483 if (init != error_mark_node)
5484 TARGET_EXPR_DIRECT_INIT_P (init) = true;
5486 init_code = NULL_TREE;
5492 if (init && TREE_CODE (init) != TREE_VEC)
5494 init_code = store_init_value (decl, init, flags);
5495 if (pedantic && TREE_CODE (type) == ARRAY_TYPE
5496 && DECL_INITIAL (decl)
5497 && TREE_CODE (DECL_INITIAL (decl)) == STRING_CST
5498 && PAREN_STRING_LITERAL_P (DECL_INITIAL (decl)))
5499 warning (0, "array %qD initialized by parenthesized string literal %qE",
5500 decl, DECL_INITIAL (decl));
5506 if (CLASS_TYPE_P (core_type = strip_array_types (type))
5507 && (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type)
5508 || CLASSTYPE_REF_FIELDS_NEED_INIT (core_type)))
5509 diagnose_uninitialized_cst_or_ref_member (core_type, /*using_new=*/false,
5512 check_for_uninitialized_const_var (decl);
5515 if (init && init != error_mark_node)
5516 init_code = build2 (INIT_EXPR, type, decl, init);
5519 init_code = add_stmt_to_compound (extra_init, init_code);
5521 if (init_code && DECL_IN_AGGR_P (decl))
5523 static int explained = 0;
5525 if (cxx_dialect < cxx0x)
5526 error ("initializer invalid for static member with constructor");
5528 error ("non-constant in-class initialization invalid for static "
5529 "member %qD", decl);
5532 error ("(an out of class initialization is required)");
5540 /* If DECL is not a local variable, give it RTL. */
5543 make_rtl_for_nonlocal_decl (tree decl, tree init, const char* asmspec)
5545 int toplev = toplevel_bindings_p ();
5547 const char *filename;
5549 /* Set the DECL_ASSEMBLER_NAME for the object. */
5552 /* The `register' keyword, when used together with an
5553 asm-specification, indicates that the variable should be
5554 placed in a particular register. */
5555 if (TREE_CODE (decl) == VAR_DECL && DECL_REGISTER (decl))
5557 set_user_assembler_name (decl, asmspec);
5558 DECL_HARD_REGISTER (decl) = 1;
5562 if (TREE_CODE (decl) == FUNCTION_DECL
5563 && DECL_BUILT_IN_CLASS (decl) == BUILT_IN_NORMAL)
5564 set_builtin_user_assembler_name (decl, asmspec);
5565 set_user_assembler_name (decl, asmspec);
5569 /* Handle non-variables up front. */
5570 if (TREE_CODE (decl) != VAR_DECL)
5572 rest_of_decl_compilation (decl, toplev, at_eof);
5576 /* If we see a class member here, it should be a static data
5578 if (DECL_LANG_SPECIFIC (decl) && DECL_IN_AGGR_P (decl))
5580 gcc_assert (TREE_STATIC (decl));
5581 /* An in-class declaration of a static data member should be
5582 external; it is only a declaration, and not a definition. */
5583 if (init == NULL_TREE)
5584 gcc_assert (DECL_EXTERNAL (decl) || !TREE_PUBLIC (decl));
5587 /* We don't create any RTL for local variables. */
5588 if (DECL_FUNCTION_SCOPE_P (decl) && !TREE_STATIC (decl))
5591 /* We defer emission of local statics until the corresponding
5592 DECL_EXPR is expanded. */
5593 defer_p = DECL_FUNCTION_SCOPE_P (decl) || DECL_VIRTUAL_P (decl);
5595 /* We try to defer namespace-scope static constants so that they are
5596 not emitted into the object file unnecessarily. */
5597 filename = input_filename;
5598 if (!DECL_VIRTUAL_P (decl)
5599 && TREE_READONLY (decl)
5600 && DECL_INITIAL (decl) != NULL_TREE
5601 && DECL_INITIAL (decl) != error_mark_node
5603 && ! EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl))
5605 && !TREE_PUBLIC (decl))
5607 /* Fool with the linkage of static consts according to #pragma
5609 struct c_fileinfo *finfo = get_fileinfo (filename);
5610 if (!finfo->interface_unknown && !TREE_PUBLIC (decl))
5612 TREE_PUBLIC (decl) = 1;
5613 DECL_EXTERNAL (decl) = finfo->interface_only;
5618 /* Likewise for template instantiations. */
5619 else if (DECL_LANG_SPECIFIC (decl)
5620 && DECL_IMPLICIT_INSTANTIATION (decl))
5623 /* If we're not deferring, go ahead and assemble the variable. */
5625 rest_of_decl_compilation (decl, toplev, at_eof);
5628 /* walk_tree helper for wrap_temporary_cleanups, below. */
5631 wrap_cleanups_r (tree *stmt_p, int *walk_subtrees, void *data)
5633 if (TYPE_P (*stmt_p))
5639 if (TREE_CODE (*stmt_p) == TARGET_EXPR)
5641 tree guard = (tree)data;
5642 tree tcleanup = TARGET_EXPR_CLEANUP (*stmt_p);
5644 tcleanup = build2 (TRY_CATCH_EXPR, void_type_node, tcleanup, guard);
5645 /* Tell honor_protect_cleanup_actions to handle this as a separate
5647 TRY_CATCH_IS_CLEANUP (tcleanup) = 1;
5649 TARGET_EXPR_CLEANUP (*stmt_p) = tcleanup;
5655 /* We're initializing a local variable which has a cleanup GUARD. If there
5656 are any temporaries used in the initializer INIT of this variable, we
5657 need to wrap their cleanups with TRY_CATCH_EXPR (, GUARD) so that the
5658 variable will be cleaned up properly if one of them throws.
5660 Unfortunately, there's no way to express this properly in terms of
5661 nesting, as the regions for the temporaries overlap the region for the
5662 variable itself; if there are two temporaries, the variable needs to be
5663 the first thing destroyed if either of them throws. However, we only
5664 want to run the variable's cleanup if it actually got constructed. So
5665 we need to guard the temporary cleanups with the variable's cleanup if
5666 they are run on the normal path, but not if they are run on the
5667 exceptional path. We implement this by telling
5668 honor_protect_cleanup_actions to strip the variable cleanup from the
5669 exceptional path. */
5672 wrap_temporary_cleanups (tree init, tree guard)
5674 cp_walk_tree_without_duplicates (&init, wrap_cleanups_r, (void *)guard);
5677 /* Generate code to initialize DECL (a local variable). */
5680 initialize_local_var (tree decl, tree init)
5682 tree type = TREE_TYPE (decl);
5686 gcc_assert (TREE_CODE (decl) == VAR_DECL
5687 || TREE_CODE (decl) == RESULT_DECL);
5688 gcc_assert (!TREE_STATIC (decl));
5690 if (DECL_SIZE (decl) == NULL_TREE)
5692 /* If we used it already as memory, it must stay in memory. */
5693 DECL_INITIAL (decl) = NULL_TREE;
5694 TREE_ADDRESSABLE (decl) = TREE_USED (decl);
5698 if (type == error_mark_node)
5701 /* Compute and store the initial value. */
5702 already_used = TREE_USED (decl) || TREE_USED (type);
5703 if (TREE_USED (type))
5704 DECL_READ_P (decl) = 1;
5706 /* Generate a cleanup, if necessary. */
5707 cleanup = cxx_maybe_build_cleanup (decl, tf_warning_or_error);
5709 /* Perform the initialization. */
5712 if (TREE_CODE (init) == INIT_EXPR
5713 && !TREE_SIDE_EFFECTS (TREE_OPERAND (init, 1)))
5715 /* Stick simple initializers in DECL_INITIAL so that
5716 -Wno-init-self works (c++/34772). */
5717 gcc_assert (TREE_OPERAND (init, 0) == decl);
5718 DECL_INITIAL (decl) = TREE_OPERAND (init, 1);
5722 int saved_stmts_are_full_exprs_p;
5724 /* If we're only initializing a single object, guard the
5725 destructors of any temporaries used in its initializer with
5726 its destructor. This isn't right for arrays because each
5727 element initialization is a full-expression. */
5728 if (cleanup && TREE_CODE (type) != ARRAY_TYPE)
5729 wrap_temporary_cleanups (init, cleanup);
5731 gcc_assert (building_stmt_tree ());
5732 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
5733 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
5734 finish_expr_stmt (init);
5735 current_stmt_tree ()->stmts_are_full_exprs_p =
5736 saved_stmts_are_full_exprs_p;
5740 /* Set this to 0 so we can tell whether an aggregate which was
5741 initialized was ever used. Don't do this if it has a
5742 destructor, so we don't complain about the 'resource
5743 allocation is initialization' idiom. Now set
5744 attribute((unused)) on types so decls of that type will be
5745 marked used. (see TREE_USED, above.) */
5746 if (TYPE_NEEDS_CONSTRUCTING (type)
5748 && TYPE_HAS_TRIVIAL_DESTRUCTOR (type)
5749 && DECL_NAME (decl))
5750 TREE_USED (decl) = 0;
5751 else if (already_used)
5752 TREE_USED (decl) = 1;
5755 finish_decl_cleanup (decl, cleanup);
5758 /* DECL is a VAR_DECL for a compiler-generated variable with static
5759 storage duration (like a virtual table) whose initializer is a
5760 compile-time constant. Initialize the variable and provide it to the
5764 initialize_artificial_var (tree decl, VEC(constructor_elt,gc) *v)
5767 gcc_assert (DECL_ARTIFICIAL (decl));
5768 init = build_constructor (TREE_TYPE (decl), v);
5769 gcc_assert (TREE_CODE (init) == CONSTRUCTOR);
5770 DECL_INITIAL (decl) = init;
5771 DECL_INITIALIZED_P (decl) = 1;
5772 determine_visibility (decl);
5773 layout_var_decl (decl);
5774 maybe_commonize_var (decl);
5775 make_rtl_for_nonlocal_decl (decl, init, /*asmspec=*/NULL);
5778 /* INIT is the initializer for a variable, as represented by the
5779 parser. Returns true iff INIT is type-dependent. */
5782 type_dependent_init_p (tree init)
5784 if (TREE_CODE (init) == TREE_LIST)
5785 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
5786 return any_type_dependent_elements_p (init);
5787 else if (TREE_CODE (init) == CONSTRUCTOR)
5788 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
5790 VEC(constructor_elt, gc) *elts;
5794 elts = CONSTRUCTOR_ELTS (init);
5795 nelts = VEC_length (constructor_elt, elts);
5796 for (i = 0; i < nelts; ++i)
5797 if (type_dependent_init_p (VEC_index (constructor_elt,
5802 /* It must be a simple expression, e.g., int i = 3; */
5803 return type_dependent_expression_p (init);
5808 /* INIT is the initializer for a variable, as represented by the
5809 parser. Returns true iff INIT is value-dependent. */
5812 value_dependent_init_p (tree init)
5814 if (TREE_CODE (init) == TREE_LIST)
5815 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
5816 return any_value_dependent_elements_p (init);
5817 else if (TREE_CODE (init) == CONSTRUCTOR)
5818 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
5820 VEC(constructor_elt, gc) *elts;
5824 elts = CONSTRUCTOR_ELTS (init);
5825 nelts = VEC_length (constructor_elt, elts);
5826 for (i = 0; i < nelts; ++i)
5827 if (value_dependent_init_p (VEC_index (constructor_elt,
5832 /* It must be a simple expression, e.g., int i = 3; */
5833 return value_dependent_expression_p (init);
5838 /* Finish processing of a declaration;
5839 install its line number and initial value.
5840 If the length of an array type is not known before,
5841 it must be determined now, from the initial value, or it is an error.
5843 INIT is the initializer (if any) for DECL. If INIT_CONST_EXPR_P is
5844 true, then INIT is an integral constant expression.
5846 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
5847 if the (init) syntax was used. */
5850 cp_finish_decl (tree decl, tree init, bool init_const_expr_p,
5851 tree asmspec_tree, int flags)
5855 const char *asmspec = NULL;
5856 int was_readonly = 0;
5857 bool var_definition_p = false;
5860 if (decl == error_mark_node)
5865 error ("assignment (not initialization) in declaration");
5869 gcc_assert (TREE_CODE (decl) != RESULT_DECL);
5870 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
5871 gcc_assert (TREE_CODE (decl) != PARM_DECL);
5873 type = TREE_TYPE (decl);
5874 if (type == error_mark_node)
5877 /* Assume no cleanup is required. */
5878 cleanup = NULL_TREE;
5880 /* If a name was specified, get the string. */
5881 if (global_scope_p (current_binding_level))
5882 asmspec_tree = maybe_apply_renaming_pragma (decl, asmspec_tree);
5883 if (asmspec_tree && asmspec_tree != error_mark_node)
5884 asmspec = TREE_STRING_POINTER (asmspec_tree);
5886 if (current_class_type
5887 && CP_DECL_CONTEXT (decl) == current_class_type
5888 && TYPE_BEING_DEFINED (current_class_type)
5889 && (DECL_INITIAL (decl) || init))
5890 DECL_INITIALIZED_IN_CLASS_P (decl) = 1;
5892 auto_node = type_uses_auto (type);
5896 if (init == NULL_TREE)
5898 error ("declaration of %q#D has no initializer", decl);
5899 TREE_TYPE (decl) = error_mark_node;
5903 if (TREE_CODE (d_init) == TREE_LIST)
5904 d_init = build_x_compound_expr_from_list (d_init, ELK_INIT,
5905 tf_warning_or_error);
5906 d_init = resolve_nondeduced_context (d_init);
5907 if (describable_type (d_init))
5909 type = TREE_TYPE (decl) = do_auto_deduction (type, d_init,
5911 if (type == error_mark_node)
5916 if (!ensure_literal_type_for_constexpr_object (decl))
5917 DECL_DECLARED_CONSTEXPR_P (decl) = 0;
5919 if (init && TREE_CODE (decl) == FUNCTION_DECL)
5922 if (init == ridpointers[(int)RID_DELETE])
5924 /* FIXME check this is 1st decl. */
5925 DECL_DELETED_FN (decl) = 1;
5926 DECL_DECLARED_INLINE_P (decl) = 1;
5927 DECL_INITIAL (decl) = error_mark_node;
5928 FOR_EACH_CLONE (clone, decl)
5930 DECL_DELETED_FN (clone) = 1;
5931 DECL_DECLARED_INLINE_P (clone) = 1;
5932 DECL_INITIAL (clone) = error_mark_node;
5936 else if (init == ridpointers[(int)RID_DEFAULT])
5938 if (defaultable_fn_check (decl))
5939 DECL_DEFAULTED_FN (decl) = 1;
5941 DECL_INITIAL (decl) = NULL_TREE;
5945 if (init && TREE_CODE (decl) == VAR_DECL)
5947 DECL_NONTRIVIALLY_INITIALIZED_P (decl) = 1;
5948 if (init_const_expr_p)
5950 /* Set these flags now for templates. We'll update the flags in
5951 store_init_value for instantiations. */
5952 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl) = 1;
5953 if (decl_maybe_constant_var_p (decl))
5954 TREE_CONSTANT (decl) = 1;
5958 if (processing_template_decl)
5960 bool type_dependent_p;
5962 /* Add this declaration to the statement-tree. */
5963 if (at_function_scope_p ())
5964 add_decl_expr (decl);
5966 type_dependent_p = dependent_type_p (type);
5968 if (check_for_bare_parameter_packs (init))
5971 DECL_INITIAL (decl) = NULL_TREE;
5974 /* Generally, initializers in templates are expanded when the
5975 template is instantiated. But, if DECL is a variable constant
5976 then it can be used in future constant expressions, so its value
5977 must be available. */
5979 if (TREE_CODE (decl) != VAR_DECL || dependent_type_p (type))
5980 /* We can't do anything if the decl has dependent type. */;
5982 && init_const_expr_p
5983 && !type_dependent_p
5984 && decl_maybe_constant_var_p (decl)
5985 && !type_dependent_init_p (init)
5986 && !value_dependent_init_p (init))
5988 /* This variable seems to be a non-dependent constant, so process
5989 its initializer. If check_initializer returns non-null the
5990 initialization wasn't constant after all. */
5991 tree init_code = check_initializer (decl, init, flags, &cleanup);
5992 if (init_code == NULL_TREE)
5995 else if (!DECL_PRETTY_FUNCTION_P (decl))
5996 /* Deduce array size even if the initializer is dependent. */
5997 maybe_deduce_size_from_array_init (decl, init);
6000 DECL_INITIAL (decl) = init;
6004 /* Take care of TYPE_DECLs up front. */
6005 if (TREE_CODE (decl) == TYPE_DECL)
6007 if (type != error_mark_node
6008 && MAYBE_CLASS_TYPE_P (type) && DECL_NAME (decl))
6010 if (TREE_TYPE (DECL_NAME (decl)) && TREE_TYPE (decl) != type)
6011 warning (0, "shadowing previous type declaration of %q#D", decl);
6012 set_identifier_type_value (DECL_NAME (decl), decl);
6015 /* If we have installed this as the canonical typedef for this
6016 type, and that type has not been defined yet, delay emitting
6017 the debug information for it, as we will emit it later. */
6018 if (TYPE_MAIN_DECL (TREE_TYPE (decl)) == decl
6019 && !COMPLETE_TYPE_P (TREE_TYPE (decl)))
6020 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
6022 rest_of_decl_compilation (decl, DECL_FILE_SCOPE_P (decl),
6027 /* A reference will be modified here, as it is initialized. */
6028 if (! DECL_EXTERNAL (decl)
6029 && TREE_READONLY (decl)
6030 && TREE_CODE (type) == REFERENCE_TYPE)
6033 TREE_READONLY (decl) = 0;
6036 if (TREE_CODE (decl) == VAR_DECL)
6038 /* Only variables with trivial initialization and destruction can
6039 have thread-local storage. */
6040 if (DECL_THREAD_LOCAL_P (decl)
6041 && (type_has_nontrivial_default_init (TREE_TYPE (decl))
6042 || TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl))))
6043 error ("%qD cannot be thread-local because it has non-trivial "
6044 "type %qT", decl, TREE_TYPE (decl));
6045 /* If this is a local variable that will need a mangled name,
6046 register it now. We must do this before processing the
6047 initializer for the variable, since the initialization might
6048 require a guard variable, and since the mangled name of the
6049 guard variable will depend on the mangled name of this
6051 if (DECL_FUNCTION_SCOPE_P (decl)
6052 && TREE_STATIC (decl)
6053 && !DECL_ARTIFICIAL (decl))
6055 push_local_name (decl);
6056 if (DECL_CONSTRUCTOR_P (current_function_decl)
6057 || DECL_DESTRUCTOR_P (current_function_decl))
6058 /* Normally local_decls is populated during GIMPLE lowering,
6059 but [cd]tors are never actually compiled directly. We need
6060 to put statics on the list so we can deal with the label
6061 address extension. */
6062 add_local_decl (cfun, decl);
6065 /* Convert the initializer to the type of DECL, if we have not
6066 already initialized DECL. */
6067 if (!DECL_INITIALIZED_P (decl)
6068 /* If !DECL_EXTERNAL then DECL is being defined. In the
6069 case of a static data member initialized inside the
6070 class-specifier, there can be an initializer even if DECL
6071 is *not* defined. */
6072 && (!DECL_EXTERNAL (decl) || init))
6074 if (TYPE_FOR_JAVA (type) && MAYBE_CLASS_TYPE_P (type))
6077 = IDENTIFIER_GLOBAL_VALUE (get_identifier ("jclass"));
6078 /* Allow libjava/prims.cc define primitive classes. */
6079 if (init != NULL_TREE
6080 || jclass == NULL_TREE
6081 || TREE_CODE (jclass) != TYPE_DECL
6082 || !POINTER_TYPE_P (TREE_TYPE (jclass))
6083 || !same_type_ignoring_top_level_qualifiers_p
6084 (type, TREE_TYPE (TREE_TYPE (jclass))))
6085 error ("Java object %qD not allocated with %<new%>", decl);
6088 init = check_initializer (decl, init, flags, &cleanup);
6089 /* Thread-local storage cannot be dynamically initialized. */
6090 if (DECL_THREAD_LOCAL_P (decl) && init)
6092 error ("%qD is thread-local and so cannot be dynamically "
6093 "initialized", decl);
6097 /* Check that the initializer for a static data member was a
6098 constant. Although we check in the parser that the
6099 initializer is an integral constant expression, we do not
6100 simplify division-by-zero at the point at which it
6101 occurs. Therefore, in:
6103 struct S { static const int i = 7 / 0; };
6105 we issue an error at this point. It would
6106 probably be better to forbid division by zero in
6107 integral constant expressions. */
6108 if (DECL_EXTERNAL (decl) && init)
6110 error ("%qD cannot be initialized by a non-constant expression"
6111 " when being declared", decl);
6112 DECL_INITIALIZED_IN_CLASS_P (decl) = 0;
6120 The memory occupied by any object of static storage
6121 duration is zero-initialized at program startup before
6122 any other initialization takes place.
6124 We cannot create an appropriate initializer until after
6125 the type of DECL is finalized. If DECL_INITIAL is set,
6126 then the DECL is statically initialized, and any
6127 necessary zero-initialization has already been performed. */
6128 if (TREE_STATIC (decl) && !DECL_INITIAL (decl))
6129 DECL_INITIAL (decl) = build_zero_init (TREE_TYPE (decl),
6130 /*nelts=*/NULL_TREE,
6131 /*static_storage_p=*/true);
6132 /* Remember that the initialization for this variable has
6134 DECL_INITIALIZED_P (decl) = 1;
6135 /* This declaration is the definition of this variable,
6136 unless we are initializing a static data member within
6137 the class specifier. */
6138 if (!DECL_EXTERNAL (decl))
6139 var_definition_p = true;
6141 /* If the variable has an array type, lay out the type, even if
6142 there is no initializer. It is valid to index through the
6143 array, and we must get TYPE_ALIGN set correctly on the array
6145 else if (TREE_CODE (type) == ARRAY_TYPE)
6148 if (TREE_STATIC (decl)
6149 && !at_function_scope_p ()
6150 && current_function_decl == NULL)
6151 /* So decl is a global variable or a static member of a
6152 non local class. Record the types it uses
6153 so that we can decide later to emit debug info for them. */
6154 record_types_used_by_current_var_decl (decl);
6156 else if (TREE_CODE (decl) == FIELD_DECL
6157 && TYPE_FOR_JAVA (type) && MAYBE_CLASS_TYPE_P (type))
6158 error ("non-static data member %qD has Java class type", decl);
6160 /* Add this declaration to the statement-tree. This needs to happen
6161 after the call to check_initializer so that the DECL_EXPR for a
6162 reference temp is added before the DECL_EXPR for the reference itself. */
6163 if (at_function_scope_p ())
6164 add_decl_expr (decl);
6166 /* Let the middle end know about variables and functions -- but not
6167 static data members in uninstantiated class templates. */
6168 if (TREE_CODE (decl) == VAR_DECL
6169 || TREE_CODE (decl) == FUNCTION_DECL)
6171 if (TREE_CODE (decl) == VAR_DECL)
6173 layout_var_decl (decl);
6174 maybe_commonize_var (decl);
6177 /* This needs to happen after the linkage is set. */
6178 determine_visibility (decl);
6180 if (var_definition_p && TREE_STATIC (decl))
6182 /* If a TREE_READONLY variable needs initialization
6183 at runtime, it is no longer readonly and we need to
6184 avoid MEM_READONLY_P being set on RTL created for it. */
6187 if (TREE_READONLY (decl))
6188 TREE_READONLY (decl) = 0;
6191 else if (was_readonly)
6192 TREE_READONLY (decl) = 1;
6195 make_rtl_for_nonlocal_decl (decl, init, asmspec);
6197 /* Check for abstractness of the type. Notice that there is no
6198 need to strip array types here since the check for those types
6199 is already done within create_array_type_for_decl. */
6200 if (TREE_CODE (type) == FUNCTION_TYPE
6201 || TREE_CODE (type) == METHOD_TYPE)
6202 abstract_virtuals_error (decl, TREE_TYPE (type));
6204 abstract_virtuals_error (decl, type);
6206 if (TREE_TYPE (decl) == error_mark_node)
6207 /* No initialization required. */
6209 else if (TREE_CODE (decl) == FUNCTION_DECL)
6213 if (init == ridpointers[(int)RID_DEFAULT])
6215 /* An out-of-class default definition is defined at
6216 the point where it is explicitly defaulted. */
6217 if (DECL_DELETED_FN (decl))
6218 maybe_explain_implicit_delete (decl);
6219 else if (DECL_INITIAL (decl) == error_mark_node)
6220 synthesize_method (decl);
6223 error ("function %q#D is initialized like a variable", decl);
6225 /* else no initialization required. */
6227 else if (DECL_EXTERNAL (decl)
6228 && ! (DECL_LANG_SPECIFIC (decl)
6229 && DECL_NOT_REALLY_EXTERN (decl)))
6232 DECL_INITIAL (decl) = init;
6234 /* A variable definition. */
6235 else if (DECL_FUNCTION_SCOPE_P (decl) && !TREE_STATIC (decl))
6236 /* Initialize the local variable. */
6237 initialize_local_var (decl, init);
6239 /* If a variable is defined, and then a subsequent
6240 definition with external linkage is encountered, we will
6241 get here twice for the same variable. We want to avoid
6242 calling expand_static_init more than once. For variables
6243 that are not static data members, we can call
6244 expand_static_init only when we actually process the
6245 initializer. It is not legal to redeclare a static data
6246 member, so this issue does not arise in that case. */
6247 else if (var_definition_p && TREE_STATIC (decl))
6248 expand_static_init (decl, init);
6251 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
6252 reference, insert it in the statement-tree now. */
6254 push_cleanup (decl, cleanup, false);
6257 TREE_READONLY (decl) = 1;
6260 /* Returns a declaration for a VAR_DECL as if:
6262 extern "C" TYPE NAME;
6264 had been seen. Used to create compiler-generated global
6268 declare_global_var (tree name, tree type)
6272 push_to_top_level ();
6273 decl = build_decl (input_location, VAR_DECL, name, type);
6274 TREE_PUBLIC (decl) = 1;
6275 DECL_EXTERNAL (decl) = 1;
6276 DECL_ARTIFICIAL (decl) = 1;
6277 /* If the user has explicitly declared this variable (perhaps
6278 because the code we are compiling is part of a low-level runtime
6279 library), then it is possible that our declaration will be merged
6280 with theirs by pushdecl. */
6281 decl = pushdecl (decl);
6282 cp_finish_decl (decl, NULL_TREE, false, NULL_TREE, 0);
6283 pop_from_top_level ();
6288 /* Returns the type for the argument to "__cxa_atexit" (or "atexit",
6289 if "__cxa_atexit" is not being used) corresponding to the function
6290 to be called when the program exits. */
6293 get_atexit_fn_ptr_type (void)
6297 if (!atexit_fn_ptr_type_node)
6300 if (flag_use_cxa_atexit
6301 && !targetm.cxx.use_atexit_for_cxa_atexit ())
6302 /* The parameter to "__cxa_atexit" is "void (*)(void *)". */
6303 arg_type = ptr_type_node;
6305 /* The parameter to "atexit" is "void (*)(void)". */
6306 arg_type = NULL_TREE;
6308 fn_type = build_function_type_list (void_type_node,
6309 arg_type, NULL_TREE);
6310 atexit_fn_ptr_type_node = build_pointer_type (fn_type);
6313 return atexit_fn_ptr_type_node;
6316 /* Returns a pointer to the `atexit' function. Note that if
6317 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
6318 `__cxa_atexit' function specified in the IA64 C++ ABI. */
6321 get_atexit_node (void)
6327 bool use_aeabi_atexit;
6332 if (flag_use_cxa_atexit && !targetm.cxx.use_atexit_for_cxa_atexit ())
6334 /* The declaration for `__cxa_atexit' is:
6336 int __cxa_atexit (void (*)(void *), void *, void *)
6338 We build up the argument types and then the function type
6340 tree argtype0, argtype1, argtype2;
6342 use_aeabi_atexit = targetm.cxx.use_aeabi_atexit ();
6343 /* First, build the pointer-to-function type for the first
6345 fn_ptr_type = get_atexit_fn_ptr_type ();
6346 /* Then, build the rest of the argument types. */
6347 argtype2 = ptr_type_node;
6348 if (use_aeabi_atexit)
6350 argtype1 = fn_ptr_type;
6351 argtype0 = ptr_type_node;
6355 argtype1 = ptr_type_node;
6356 argtype0 = fn_ptr_type;
6358 /* And the final __cxa_atexit type. */
6359 fn_type = build_function_type_list (integer_type_node,
6360 argtype0, argtype1, argtype2,
6362 fn_ptr_type = build_pointer_type (fn_type);
6363 if (use_aeabi_atexit)
6364 name = "__aeabi_atexit";
6366 name = "__cxa_atexit";
6370 /* The declaration for `atexit' is:
6372 int atexit (void (*)());
6374 We build up the argument types and then the function type
6376 fn_ptr_type = get_atexit_fn_ptr_type ();
6377 /* Build the final atexit type. */
6378 fn_type = build_function_type_list (integer_type_node,
6379 fn_ptr_type, NULL_TREE);
6383 /* Now, build the function declaration. */
6384 push_lang_context (lang_name_c);
6385 atexit_fndecl = build_library_fn_ptr (name, fn_type);
6386 mark_used (atexit_fndecl);
6387 pop_lang_context ();
6388 atexit_node = decay_conversion (atexit_fndecl);
6393 /* Returns the __dso_handle VAR_DECL. */
6396 get_dso_handle_node (void)
6398 if (dso_handle_node)
6399 return dso_handle_node;
6401 /* Declare the variable. */
6402 dso_handle_node = declare_global_var (get_identifier ("__dso_handle"),
6405 return dso_handle_node;
6408 /* Begin a new function with internal linkage whose job will be simply
6409 to destroy some particular variable. */
6411 static GTY(()) int start_cleanup_cnt;
6414 start_cleanup_fn (void)
6419 bool use_cxa_atexit = flag_use_cxa_atexit
6420 && !targetm.cxx.use_atexit_for_cxa_atexit ();
6422 push_to_top_level ();
6424 /* No need to mangle this. */
6425 push_lang_context (lang_name_c);
6427 /* Build the name of the function. */
6428 sprintf (name, "__tcf_%d", start_cleanup_cnt++);
6429 /* Build the function declaration. */
6430 fntype = TREE_TYPE (get_atexit_fn_ptr_type ());
6431 fndecl = build_lang_decl (FUNCTION_DECL, get_identifier (name), fntype);
6432 /* It's a function with internal linkage, generated by the
6434 TREE_PUBLIC (fndecl) = 0;
6435 DECL_ARTIFICIAL (fndecl) = 1;
6436 /* Make the function `inline' so that it is only emitted if it is
6437 actually needed. It is unlikely that it will be inlined, since
6438 it is only called via a function pointer, but we avoid unnecessary
6439 emissions this way. */
6440 DECL_DECLARED_INLINE_P (fndecl) = 1;
6441 DECL_INTERFACE_KNOWN (fndecl) = 1;
6442 /* Build the parameter. */
6447 parmdecl = cp_build_parm_decl (NULL_TREE, ptr_type_node);
6448 DECL_CONTEXT (parmdecl) = fndecl;
6449 TREE_USED (parmdecl) = 1;
6450 DECL_READ_P (parmdecl) = 1;
6451 DECL_ARGUMENTS (fndecl) = parmdecl;
6455 start_preparsed_function (fndecl, NULL_TREE, SF_PRE_PARSED);
6457 pop_lang_context ();
6459 return current_function_decl;
6462 /* Finish the cleanup function begun by start_cleanup_fn. */
6465 end_cleanup_fn (void)
6467 expand_or_defer_fn (finish_function (0));
6469 pop_from_top_level ();
6472 /* Generate code to handle the destruction of DECL, an object with
6473 static storage duration. */
6476 register_dtor_fn (tree decl)
6483 tree arg0, arg1 = NULL_TREE, arg2 = NULL_TREE;
6485 type = TREE_TYPE (decl);
6486 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (type))
6487 return void_zero_node;
6489 /* If we're using "__cxa_atexit" (or "__aeabi_atexit"), and DECL is
6490 a class object, we can just pass the destructor to
6491 "__cxa_atexit"; we don't have to build a temporary function to do
6493 use_dtor = (flag_use_cxa_atexit
6494 && !targetm.cxx.use_atexit_for_cxa_atexit ()
6495 && CLASS_TYPE_P (type));
6500 /* Find the destructor. */
6501 idx = lookup_fnfields_1 (type, complete_dtor_identifier);
6502 gcc_assert (idx >= 0);
6503 cleanup = VEC_index (tree, CLASSTYPE_METHOD_VEC (type), idx);
6504 /* Make sure it is accessible. */
6505 perform_or_defer_access_check (TYPE_BINFO (type), cleanup, cleanup);
6509 /* Call build_cleanup before we enter the anonymous function so
6510 that any access checks will be done relative to the current
6511 scope, rather than the scope of the anonymous function. */
6512 build_cleanup (decl);
6514 /* Now start the function. */
6515 cleanup = start_cleanup_fn ();
6517 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
6518 to the original function, rather than the anonymous one. That
6519 will make the back end think that nested functions are in use,
6520 which causes confusion. */
6521 push_deferring_access_checks (dk_no_check);
6522 fcall = build_cleanup (decl);
6523 pop_deferring_access_checks ();
6525 /* Create the body of the anonymous function. */
6526 compound_stmt = begin_compound_stmt (BCS_FN_BODY);
6527 finish_expr_stmt (fcall);
6528 finish_compound_stmt (compound_stmt);
6532 /* Call atexit with the cleanup function. */
6533 mark_used (cleanup);
6534 cleanup = build_address (cleanup);
6535 if (flag_use_cxa_atexit && !targetm.cxx.use_atexit_for_cxa_atexit ())
6541 /* We must convert CLEANUP to the type that "__cxa_atexit"
6543 cleanup = build_nop (get_atexit_fn_ptr_type (), cleanup);
6544 /* "__cxa_atexit" will pass the address of DECL to the
6545 cleanup function. */
6547 addr = build_address (decl);
6548 /* The declared type of the parameter to "__cxa_atexit" is
6549 "void *". For plain "T*", we could just let the
6550 machinery in cp_build_function_call convert it -- but if the
6551 type is "cv-qualified T *", then we need to convert it
6552 before passing it in, to avoid spurious errors. */
6553 addr = build_nop (ptr_type_node, addr);
6556 /* Since the cleanup functions we build ignore the address
6557 they're given, there's no reason to pass the actual address
6558 in, and, in general, it's cheaper to pass NULL than any
6560 addr = null_pointer_node;
6561 arg2 = cp_build_addr_expr (get_dso_handle_node (),
6562 tf_warning_or_error);
6563 if (targetm.cxx.use_aeabi_atexit ())
6576 return cp_build_function_call_nary (get_atexit_node (), tf_warning_or_error,
6577 arg0, arg1, arg2, NULL_TREE);
6580 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
6581 is its initializer. Generate code to handle the construction
6582 and destruction of DECL. */
6585 expand_static_init (tree decl, tree init)
6587 gcc_assert (TREE_CODE (decl) == VAR_DECL);
6588 gcc_assert (TREE_STATIC (decl));
6590 /* Some variables require no dynamic initialization. */
6592 && TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
6595 if (DECL_FUNCTION_SCOPE_P (decl))
6597 /* Emit code to perform this initialization but once. */
6598 tree if_stmt = NULL_TREE, inner_if_stmt = NULL_TREE;
6599 tree then_clause = NULL_TREE, inner_then_clause = NULL_TREE;
6600 tree guard, guard_addr;
6601 tree acquire_fn, release_fn, abort_fn;
6604 /* Emit code to perform this initialization but once. This code
6607 static <type> guard;
6608 if (!guard.first_byte) {
6609 if (__cxa_guard_acquire (&guard)) {
6612 // Do initialization.
6613 flag = true; __cxa_guard_release (&guard);
6614 // Register variable for destruction at end of program.
6616 if (!flag) __cxa_guard_abort (&guard);
6620 Note that the `flag' variable is only set to 1 *after* the
6621 initialization is complete. This ensures that an exception,
6622 thrown during the construction, will cause the variable to
6623 reinitialized when we pass through this code again, as per:
6627 If the initialization exits by throwing an exception, the
6628 initialization is not complete, so it will be tried again
6629 the next time control enters the declaration.
6631 This process should be thread-safe, too; multiple threads
6632 should not be able to initialize the variable more than
6635 /* Create the guard variable. */
6636 guard = get_guard (decl);
6638 /* This optimization isn't safe on targets with relaxed memory
6639 consistency. On such targets we force synchronization in
6640 __cxa_guard_acquire. */
6641 if (!targetm.relaxed_ordering || !flag_threadsafe_statics)
6643 /* Begin the conditional initialization. */
6644 if_stmt = begin_if_stmt ();
6645 finish_if_stmt_cond (get_guard_cond (guard), if_stmt);
6646 then_clause = begin_compound_stmt (BCS_NO_SCOPE);
6649 if (flag_threadsafe_statics)
6651 guard_addr = build_address (guard);
6653 acquire_fn = get_identifier ("__cxa_guard_acquire");
6654 release_fn = get_identifier ("__cxa_guard_release");
6655 abort_fn = get_identifier ("__cxa_guard_abort");
6656 if (!get_global_value_if_present (acquire_fn, &acquire_fn))
6658 tree vfntype = build_function_type_list (void_type_node,
6659 TREE_TYPE (guard_addr),
6661 acquire_fn = push_library_fn
6662 (acquire_fn, build_function_type_list (integer_type_node,
6663 TREE_TYPE (guard_addr),
6666 release_fn = push_library_fn (release_fn, vfntype, NULL_TREE);
6667 abort_fn = push_library_fn (abort_fn, vfntype, NULL_TREE);
6671 release_fn = identifier_global_value (release_fn);
6672 abort_fn = identifier_global_value (abort_fn);
6675 inner_if_stmt = begin_if_stmt ();
6676 finish_if_stmt_cond (build_call_n (acquire_fn, 1, guard_addr),
6679 inner_then_clause = begin_compound_stmt (BCS_NO_SCOPE);
6680 begin = get_target_expr (boolean_false_node);
6681 flag = TARGET_EXPR_SLOT (begin);
6683 TARGET_EXPR_CLEANUP (begin)
6684 = build3 (COND_EXPR, void_type_node, flag,
6686 build_call_n (abort_fn, 1, guard_addr));
6687 CLEANUP_EH_ONLY (begin) = 1;
6689 /* Do the initialization itself. */
6690 init = add_stmt_to_compound (begin, init);
6691 init = add_stmt_to_compound
6692 (init, build2 (MODIFY_EXPR, void_type_node, flag, boolean_true_node));
6693 init = add_stmt_to_compound
6694 (init, build_call_n (release_fn, 1, guard_addr));
6697 init = add_stmt_to_compound (init, set_guard (guard));
6699 /* Use atexit to register a function for destroying this static
6701 init = add_stmt_to_compound (init, register_dtor_fn (decl));
6703 finish_expr_stmt (init);
6705 if (flag_threadsafe_statics)
6707 finish_compound_stmt (inner_then_clause);
6708 finish_then_clause (inner_if_stmt);
6709 finish_if_stmt (inner_if_stmt);
6712 if (!targetm.relaxed_ordering || !flag_threadsafe_statics)
6714 finish_compound_stmt (then_clause);
6715 finish_then_clause (if_stmt);
6716 finish_if_stmt (if_stmt);
6720 static_aggregates = tree_cons (init, decl, static_aggregates);
6724 /* Make TYPE a complete type based on INITIAL_VALUE.
6725 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
6726 2 if there was no information (in which case assume 0 if DO_DEFAULT),
6727 3 if the initializer list is empty (in pedantic mode). */
6730 cp_complete_array_type (tree *ptype, tree initial_value, bool do_default)
6733 tree type, elt_type;
6737 unsigned HOST_WIDE_INT i;
6740 /* An array of character type can be initialized from a
6741 brace-enclosed string constant.
6743 FIXME: this code is duplicated from reshape_init. Probably
6744 we should just call reshape_init here? */
6745 if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (*ptype)))
6746 && TREE_CODE (initial_value) == CONSTRUCTOR
6747 && !VEC_empty (constructor_elt, CONSTRUCTOR_ELTS (initial_value)))
6749 VEC(constructor_elt,gc) *v = CONSTRUCTOR_ELTS (initial_value);
6750 tree value = VEC_index (constructor_elt, v, 0)->value;
6752 if (TREE_CODE (value) == STRING_CST
6753 && VEC_length (constructor_elt, v) == 1)
6754 initial_value = value;
6757 /* If any of the elements are parameter packs, we can't actually
6758 complete this type now because the array size is dependent. */
6759 if (TREE_CODE (initial_value) == CONSTRUCTOR)
6761 FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (initial_value),
6764 if (PACK_EXPANSION_P (value))
6770 failure = complete_array_type (ptype, initial_value, do_default);
6772 /* We can create the array before the element type is complete, which
6773 means that we didn't have these two bits set in the original type
6774 either. In completing the type, we are expected to propagate these
6775 bits. See also complete_type which does the same thing for arrays
6778 if (TYPE_DOMAIN (type))
6780 elt_type = TREE_TYPE (type);
6781 TYPE_NEEDS_CONSTRUCTING (type) = TYPE_NEEDS_CONSTRUCTING (elt_type);
6782 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type)
6783 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (elt_type);
6789 /* As above, but either give an error or reject zero-size arrays, depending
6793 cp_complete_array_type_or_error (tree *ptype, tree initial_value,
6794 bool do_default, tsubst_flags_t complain)
6797 bool sfinae = !(complain & tf_error);
6798 /* In SFINAE context we can't be lenient about zero-size arrays. */
6801 failure = cp_complete_array_type (ptype, initial_value, do_default);
6807 /* Not an error. */;
6808 else if (failure == 1)
6809 error ("initializer fails to determine size of %qT", *ptype);
6810 else if (failure == 2)
6813 error ("array size missing in %qT", *ptype);
6815 else if (failure == 3)
6816 error ("zero-size array %qT", *ptype);
6817 *ptype = error_mark_node;
6822 /* Return zero if something is declared to be a member of type
6823 CTYPE when in the context of CUR_TYPE. STRING is the error
6824 message to print in that case. Otherwise, quietly return 1. */
6827 member_function_or_else (tree ctype, tree cur_type, enum overload_flags flags)
6829 if (ctype && ctype != cur_type)
6831 if (flags == DTOR_FLAG)
6832 error ("destructor for alien class %qT cannot be a member", ctype);
6834 error ("constructor for alien class %qT cannot be a member", ctype);
6840 /* Subroutine of `grokdeclarator'. */
6842 /* Generate errors possibly applicable for a given set of specifiers.
6843 This is for ARM $7.1.2. */
6846 bad_specifiers (tree object,
6847 enum bad_spec_place type,
6858 error ("%qD declared as a %<virtual%> variable", object);
6860 error ("%qD declared as an %<inline%> variable", object);
6862 error ("%<const%> and %<volatile%> function specifiers on "
6863 "%qD invalid in variable declaration", object);
6867 error ("%qD declared as a %<virtual%> parameter", object);
6869 error ("%qD declared as an %<inline%> parameter", object);
6871 error ("%<const%> and %<volatile%> function specifiers on "
6872 "%qD invalid in parameter declaration", object);
6876 error ("%qD declared as a %<virtual%> type", object);
6878 error ("%qD declared as an %<inline%> type", object);
6880 error ("%<const%> and %<volatile%> function specifiers on "
6881 "%qD invalid in type declaration", object);
6885 error ("%qD declared as a %<virtual%> field", object);
6887 error ("%qD declared as an %<inline%> field", object);
6889 error ("%<const%> and %<volatile%> function specifiers on "
6890 "%qD invalid in field declaration", object);
6896 error ("%q+D declared as a friend", object);
6898 && (TREE_CODE (object) == TYPE_DECL
6899 || (!TYPE_PTRFN_P (TREE_TYPE (object))
6900 && !TYPE_REFFN_P (TREE_TYPE (object))
6901 && !TYPE_PTRMEMFUNC_P (TREE_TYPE (object)))))
6902 error ("%q+D declared with an exception specification", object);
6905 /* DECL is a member function or static data member and is presently
6906 being defined. Check that the definition is taking place in a
6910 check_class_member_definition_namespace (tree decl)
6912 /* These checks only apply to member functions and static data
6914 gcc_assert (TREE_CODE (decl) == FUNCTION_DECL
6915 || TREE_CODE (decl) == VAR_DECL);
6916 /* We check for problems with specializations in pt.c in
6917 check_specialization_namespace, where we can issue better
6919 if (processing_specialization)
6921 /* There are no restrictions on the placement of
6922 explicit instantiations. */
6923 if (processing_explicit_instantiation)
6927 A member function definition that appears outside of the
6928 class definition shall appear in a namespace scope enclosing
6929 the class definition.
6933 The definition for a static data member shall appear in a
6934 namespace scope enclosing the member's class definition. */
6935 if (!is_ancestor (current_namespace, DECL_CONTEXT (decl)))
6936 permerror (input_location, "definition of %qD is not in namespace enclosing %qT",
6937 decl, DECL_CONTEXT (decl));
6940 /* Build a PARM_DECL for the "this" parameter. TYPE is the
6941 METHOD_TYPE for a non-static member function; QUALS are the
6942 cv-qualifiers that apply to the function. */
6945 build_this_parm (tree type, cp_cv_quals quals)
6950 cp_cv_quals this_quals;
6952 this_type = type_of_this_parm (type);
6953 /* The `this' parameter is implicitly `const'; it cannot be
6955 this_quals = (quals & TYPE_QUAL_RESTRICT) | TYPE_QUAL_CONST;
6956 qual_type = cp_build_qualified_type (this_type, this_quals);
6957 parm = build_artificial_parm (this_identifier, qual_type);
6958 cp_apply_type_quals_to_decl (this_quals, parm);
6962 /* CTYPE is class type, or null if non-class.
6963 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
6965 DECLARATOR is the function's name.
6966 PARMS is a chain of PARM_DECLs for the function.
6967 VIRTUALP is truthvalue of whether the function is virtual or not.
6968 FLAGS are to be passed through to `grokclassfn'.
6969 QUALS are qualifiers indicating whether the function is `const'
6971 RAISES is a list of exceptions that this function can raise.
6972 CHECK is 1 if we must find this method in CTYPE, 0 if we should
6973 not look, and -1 if we should not call `grokclassfn' at all.
6975 SFK is the kind of special function (if any) for the new function.
6977 Returns `NULL_TREE' if something goes wrong, after issuing
6978 applicable error messages. */
6981 grokfndecl (tree ctype,
6985 tree orig_declarator,
6987 enum overload_flags flags,
6994 special_function_kind sfk,
6999 location_t location)
7002 int staticp = ctype && TREE_CODE (type) == FUNCTION_TYPE;
7006 type = build_exception_variant (type, raises);
7008 decl = build_lang_decl (FUNCTION_DECL, declarator, type);
7010 /* If we have an explicit location, use it, otherwise use whatever
7011 build_lang_decl used (probably input_location). */
7012 if (location != UNKNOWN_LOCATION)
7013 DECL_SOURCE_LOCATION (decl) = location;
7015 if (TREE_CODE (type) == METHOD_TYPE)
7018 parm = build_this_parm (type, quals);
7019 DECL_CHAIN (parm) = parms;
7022 DECL_ARGUMENTS (decl) = parms;
7023 for (t = parms; t; t = DECL_CHAIN (t))
7024 DECL_CONTEXT (t) = decl;
7025 /* Propagate volatile out from type to decl. */
7026 if (TYPE_VOLATILE (type))
7027 TREE_THIS_VOLATILE (decl) = 1;
7029 /* Setup decl according to sfk. */
7032 case sfk_constructor:
7033 case sfk_copy_constructor:
7034 case sfk_move_constructor:
7035 DECL_CONSTRUCTOR_P (decl) = 1;
7037 case sfk_destructor:
7038 DECL_DESTRUCTOR_P (decl) = 1;
7044 /* If pointers to member functions use the least significant bit to
7045 indicate whether a function is virtual, ensure a pointer
7046 to this function will have that bit clear. */
7047 if (TARGET_PTRMEMFUNC_VBIT_LOCATION == ptrmemfunc_vbit_in_pfn
7048 && TREE_CODE (type) == METHOD_TYPE
7049 && DECL_ALIGN (decl) < 2 * BITS_PER_UNIT)
7050 DECL_ALIGN (decl) = 2 * BITS_PER_UNIT;
7053 && TREE_CODE (orig_declarator) == TEMPLATE_ID_EXPR)
7057 ("defining explicit specialization %qD in friend declaration",
7061 tree fns = TREE_OPERAND (orig_declarator, 0);
7062 tree args = TREE_OPERAND (orig_declarator, 1);
7064 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
7066 /* Something like `template <class T> friend void f<T>()'. */
7067 error ("invalid use of template-id %qD in declaration "
7068 "of primary template",
7074 /* A friend declaration of the form friend void f<>(). Record
7075 the information in the TEMPLATE_ID_EXPR. */
7076 SET_DECL_IMPLICIT_INSTANTIATION (decl);
7078 if (TREE_CODE (fns) == COMPONENT_REF)
7080 /* Due to bison parser ickiness, we will have already looked
7081 up an operator_name or PFUNCNAME within the current class
7082 (see template_id in parse.y). If the current class contains
7083 such a name, we'll get a COMPONENT_REF here. Undo that. */
7085 gcc_assert (TREE_TYPE (TREE_OPERAND (fns, 0))
7086 == current_class_type);
7087 fns = TREE_OPERAND (fns, 1);
7089 gcc_assert (TREE_CODE (fns) == IDENTIFIER_NODE
7090 || TREE_CODE (fns) == OVERLOAD);
7091 DECL_TEMPLATE_INFO (decl) = build_template_info (fns, args);
7093 for (t = TYPE_ARG_TYPES (TREE_TYPE (decl)); t; t = TREE_CHAIN (t))
7094 if (TREE_PURPOSE (t)
7095 && TREE_CODE (TREE_PURPOSE (t)) == DEFAULT_ARG)
7097 error ("default arguments are not allowed in declaration "
7098 "of friend template specialization %qD",
7105 error ("%<inline%> is not allowed in declaration of friend "
7106 "template specialization %qD",
7113 /* If this decl has namespace scope, set that up. */
7115 set_decl_namespace (decl, in_namespace, friendp);
7117 DECL_CONTEXT (decl) = FROB_CONTEXT (current_decl_namespace ());
7119 /* `main' and builtins have implicit 'C' linkage. */
7120 if ((MAIN_NAME_P (declarator)
7121 || (IDENTIFIER_LENGTH (declarator) > 10
7122 && IDENTIFIER_POINTER (declarator)[0] == '_'
7123 && IDENTIFIER_POINTER (declarator)[1] == '_'
7124 && strncmp (IDENTIFIER_POINTER (declarator)+2, "builtin_", 8) == 0))
7125 && current_lang_name == lang_name_cplusplus
7126 && ctype == NULL_TREE
7127 && DECL_FILE_SCOPE_P (decl))
7128 SET_DECL_LANGUAGE (decl, lang_c);
7130 /* Should probably propagate const out from type to decl I bet (mrs). */
7133 DECL_STATIC_FUNCTION_P (decl) = 1;
7134 DECL_CONTEXT (decl) = ctype;
7139 DECL_CONTEXT (decl) = ctype;
7141 check_class_member_definition_namespace (decl);
7144 if (ctype == NULL_TREE && DECL_MAIN_P (decl))
7146 if (processing_template_decl)
7147 error ("cannot declare %<::main%> to be a template");
7149 error ("cannot declare %<::main%> to be inline");
7151 error ("cannot declare %<::main%> to be static");
7156 /* Members of anonymous types and local classes have no linkage; make
7157 them internal. If a typedef is made later, this will be changed. */
7158 if (ctype && (TYPE_ANONYMOUS_P (ctype)
7159 || decl_function_context (TYPE_MAIN_DECL (ctype))))
7162 if (publicp && cxx_dialect == cxx98)
7164 /* [basic.link]: A name with no linkage (notably, the name of a class
7165 or enumeration declared in a local scope) shall not be used to
7166 declare an entity with linkage.
7168 DR 757 relaxes this restriction for C++0x. */
7169 t = no_linkage_check (TREE_TYPE (decl),
7170 /*relaxed_p=*/false);
7173 if (TYPE_ANONYMOUS_P (t))
7175 if (DECL_EXTERN_C_P (decl))
7176 /* Allow this; it's pretty common in C. */;
7179 permerror (input_location, "anonymous type with no linkage "
7180 "used to declare function %q#D with linkage",
7182 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
7183 permerror (input_location, "%q+#D does not refer to the unqualified "
7184 "type, so it is not used for linkage",
7189 permerror (input_location, "type %qT with no linkage used to "
7190 "declare function %q#D with linkage", t, decl);
7194 TREE_PUBLIC (decl) = publicp;
7197 DECL_INTERFACE_KNOWN (decl) = 1;
7198 DECL_NOT_REALLY_EXTERN (decl) = 1;
7201 /* If the declaration was declared inline, mark it as such. */
7203 DECL_DECLARED_INLINE_P (decl) = 1;
7205 DECL_DECLARED_CONSTEXPR_P (decl) = true;
7207 DECL_EXTERNAL (decl) = 1;
7208 if (quals && TREE_CODE (type) == FUNCTION_TYPE)
7211 ? G_("static member function %qD cannot have cv-qualifier")
7212 : G_("non-member function %qD cannot have cv-qualifier"),
7214 quals = TYPE_UNQUALIFIED;
7217 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl))
7218 && !grok_op_properties (decl, /*complain=*/true))
7222 /* Make the init_value nonzero so pushdecl knows this is not
7223 tentative. error_mark_node is replaced later with the BLOCK. */
7224 DECL_INITIAL (decl) = error_mark_node;
7226 if (TYPE_NOTHROW_P (type) || nothrow_libfn_p (decl))
7227 TREE_NOTHROW (decl) = 1;
7229 /* Caller will do the rest of this. */
7233 if (ctype != NULL_TREE)
7234 grokclassfn (ctype, decl, flags);
7236 decl = check_explicit_specialization (orig_declarator, decl,
7239 4 * (friendp != 0));
7240 if (decl == error_mark_node)
7245 cplus_decl_attributes (&decl, *attrlist, 0);
7246 *attrlist = NULL_TREE;
7249 /* Check main's type after attributes have been applied. */
7250 if (ctype == NULL_TREE && DECL_MAIN_P (decl))
7252 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl)),
7255 tree oldtypeargs = TYPE_ARG_TYPES (TREE_TYPE (decl));
7257 error ("%<::main%> must return %<int%>");
7258 newtype = build_function_type (integer_type_node, oldtypeargs);
7259 TREE_TYPE (decl) = newtype;
7262 check_main_parameter_types (decl);
7265 if (ctype != NULL_TREE
7266 && (! TYPE_FOR_JAVA (ctype) || check_java_method (decl))
7269 tree old_decl = check_classfn (ctype, decl,
7270 (processing_template_decl
7271 > template_class_depth (ctype))
7272 ? current_template_parms
7275 if (old_decl == error_mark_node)
7283 if (TREE_CODE (old_decl) == TEMPLATE_DECL)
7284 /* Because grokfndecl is always supposed to return a
7285 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
7286 here. We depend on our callers to figure out that its
7287 really a template that's being returned. */
7288 old_decl = DECL_TEMPLATE_RESULT (old_decl);
7290 if (DECL_STATIC_FUNCTION_P (old_decl)
7291 && TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE)
7292 /* Remove the `this' parm added by grokclassfn.
7293 XXX Isn't this done in start_function, too? */
7294 revert_static_member_fn (decl);
7295 if (DECL_ARTIFICIAL (old_decl))
7297 error ("definition of implicitly-declared %qD", old_decl);
7301 /* Since we've smashed OLD_DECL to its
7302 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
7303 if (TREE_CODE (decl) == TEMPLATE_DECL)
7304 decl = DECL_TEMPLATE_RESULT (decl);
7306 /* Attempt to merge the declarations. This can fail, in
7307 the case of some invalid specialization declarations. */
7308 pushed_scope = push_scope (ctype);
7309 ok = duplicate_decls (decl, old_decl, friendp);
7311 pop_scope (pushed_scope);
7314 error ("no %q#D member function declared in class %qT",
7322 if (DECL_CONSTRUCTOR_P (decl) && !grok_ctor_properties (ctype, decl))
7325 if (ctype == NULL_TREE || check)
7329 DECL_VIRTUAL_P (decl) = 1;
7334 /* decl is a FUNCTION_DECL.
7335 specifiers are the parsed virt-specifiers.
7337 Set flags to reflect the virt-specifiers.
7342 set_virt_specifiers (tree decl, cp_virt_specifiers specifiers)
7344 if (decl == NULL_TREE)
7346 if (specifiers & VIRT_SPEC_OVERRIDE)
7347 DECL_OVERRIDE_P (decl) = 1;
7348 if (specifiers & VIRT_SPEC_FINAL)
7349 DECL_FINAL_P (decl) = 1;
7353 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
7354 the linkage that DECL will receive in the object file. */
7357 set_linkage_for_static_data_member (tree decl)
7359 /* A static data member always has static storage duration and
7360 external linkage. Note that static data members are forbidden in
7361 local classes -- the only situation in which a class has
7362 non-external linkage. */
7363 TREE_PUBLIC (decl) = 1;
7364 TREE_STATIC (decl) = 1;
7365 /* For non-template classes, static data members are always put
7366 out in exactly those files where they are defined, just as
7367 with ordinary namespace-scope variables. */
7368 if (!processing_template_decl)
7369 DECL_INTERFACE_KNOWN (decl) = 1;
7372 /* Create a VAR_DECL named NAME with the indicated TYPE.
7374 If SCOPE is non-NULL, it is the class type or namespace containing
7375 the variable. If SCOPE is NULL, the variable should is created in
7376 the innermost enclosings scope. */
7379 grokvardecl (tree type,
7381 const cp_decl_specifier_seq *declspecs,
7387 tree explicit_scope;
7389 gcc_assert (!name || TREE_CODE (name) == IDENTIFIER_NODE);
7391 /* Compute the scope in which to place the variable, but remember
7392 whether or not that scope was explicitly specified by the user. */
7393 explicit_scope = scope;
7396 /* An explicit "extern" specifier indicates a namespace-scope
7398 if (declspecs->storage_class == sc_extern)
7399 scope = current_decl_namespace ();
7400 else if (!at_function_scope_p ())
7401 scope = current_scope ();
7405 && (/* If the variable is a namespace-scope variable declared in a
7406 template, we need DECL_LANG_SPECIFIC. */
7407 (TREE_CODE (scope) == NAMESPACE_DECL && processing_template_decl)
7408 /* Similarly for namespace-scope variables with language linkage
7410 || (TREE_CODE (scope) == NAMESPACE_DECL
7411 && current_lang_name != lang_name_cplusplus)
7412 /* Similarly for static data members. */
7414 decl = build_lang_decl (VAR_DECL, name, type);
7416 decl = build_decl (input_location, VAR_DECL, name, type);
7418 if (explicit_scope && TREE_CODE (explicit_scope) == NAMESPACE_DECL)
7419 set_decl_namespace (decl, explicit_scope, 0);
7421 DECL_CONTEXT (decl) = FROB_CONTEXT (scope);
7423 if (declspecs->storage_class == sc_extern)
7425 DECL_THIS_EXTERN (decl) = 1;
7426 DECL_EXTERNAL (decl) = !initialized;
7429 if (DECL_CLASS_SCOPE_P (decl))
7431 set_linkage_for_static_data_member (decl);
7432 /* This function is only called with out-of-class definitions. */
7433 DECL_EXTERNAL (decl) = 0;
7434 check_class_member_definition_namespace (decl);
7436 /* At top level, either `static' or no s.c. makes a definition
7437 (perhaps tentative), and absence of `static' makes it public. */
7438 else if (toplevel_bindings_p ())
7440 TREE_PUBLIC (decl) = (declspecs->storage_class != sc_static
7441 && (DECL_THIS_EXTERN (decl) || ! constp));
7442 TREE_STATIC (decl) = ! DECL_EXTERNAL (decl);
7444 /* Not at top level, only `static' makes a static definition. */
7447 TREE_STATIC (decl) = declspecs->storage_class == sc_static;
7448 TREE_PUBLIC (decl) = DECL_EXTERNAL (decl);
7451 if (declspecs->specs[(int)ds_thread])
7452 DECL_TLS_MODEL (decl) = decl_default_tls_model (decl);
7454 /* If the type of the decl has no linkage, make sure that we'll
7455 notice that in mark_used. */
7456 if (cxx_dialect > cxx98
7457 && decl_linkage (decl) != lk_none
7458 && DECL_LANG_SPECIFIC (decl) == NULL
7459 && !DECL_EXTERN_C_P (decl)
7460 && no_linkage_check (TREE_TYPE (decl), /*relaxed_p=*/false))
7461 retrofit_lang_decl (decl);
7463 if (TREE_PUBLIC (decl))
7465 /* [basic.link]: A name with no linkage (notably, the name of a class
7466 or enumeration declared in a local scope) shall not be used to
7467 declare an entity with linkage.
7469 DR 757 relaxes this restriction for C++0x. */
7470 tree t = (cxx_dialect > cxx98 ? NULL_TREE
7471 : no_linkage_check (TREE_TYPE (decl), /*relaxed_p=*/false));
7474 if (TYPE_ANONYMOUS_P (t))
7476 if (DECL_EXTERN_C_P (decl))
7477 /* Allow this; it's pretty common in C. */
7481 /* DRs 132, 319 and 389 seem to indicate types with
7482 no linkage can only be used to declare extern "C"
7483 entities. Since it's not always an error in the
7484 ISO C++ 90 Standard, we only issue a warning. */
7485 warning (0, "anonymous type with no linkage used to declare "
7486 "variable %q#D with linkage", decl);
7487 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
7488 warning (0, "%q+#D does not refer to the unqualified "
7489 "type, so it is not used for linkage",
7494 warning (0, "type %qT with no linkage used to declare variable "
7495 "%q#D with linkage", t, decl);
7499 DECL_INTERFACE_KNOWN (decl) = 1;
7504 /* Create and return a canonical pointer to member function type, for
7505 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
7508 build_ptrmemfunc_type (tree type)
7512 tree unqualified_variant = NULL_TREE;
7514 if (type == error_mark_node)
7517 /* If a canonical type already exists for this type, use it. We use
7518 this method instead of type_hash_canon, because it only does a
7519 simple equality check on the list of field members. */
7521 if ((t = TYPE_GET_PTRMEMFUNC_TYPE (type)))
7524 /* Make sure that we always have the unqualified pointer-to-member
7526 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
7528 = build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type));
7530 t = make_class_type (RECORD_TYPE);
7531 xref_basetypes (t, NULL_TREE);
7533 /* Let the front end know this is a pointer to member function... */
7534 TYPE_PTRMEMFUNC_FLAG (t) = 1;
7535 /* ... and not really a class type. */
7536 SET_CLASS_TYPE_P (t, 0);
7538 field = build_decl (input_location, FIELD_DECL, pfn_identifier, type);
7541 field = build_decl (input_location, FIELD_DECL, delta_identifier,
7543 DECL_CHAIN (field) = fields;
7546 finish_builtin_struct (t, "__ptrmemfunc_type", fields, ptr_type_node);
7548 /* Zap out the name so that the back end will give us the debugging
7549 information for this anonymous RECORD_TYPE. */
7550 TYPE_NAME (t) = NULL_TREE;
7552 /* If this is not the unqualified form of this pointer-to-member
7553 type, set the TYPE_MAIN_VARIANT for this type to be the
7554 unqualified type. Since they are actually RECORD_TYPEs that are
7555 not variants of each other, we must do this manually.
7556 As we just built a new type there is no need to do yet another copy. */
7557 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
7559 int type_quals = cp_type_quals (type);
7560 TYPE_READONLY (t) = (type_quals & TYPE_QUAL_CONST) != 0;
7561 TYPE_VOLATILE (t) = (type_quals & TYPE_QUAL_VOLATILE) != 0;
7562 TYPE_RESTRICT (t) = (type_quals & TYPE_QUAL_RESTRICT) != 0;
7563 TYPE_MAIN_VARIANT (t) = unqualified_variant;
7564 TYPE_NEXT_VARIANT (t) = TYPE_NEXT_VARIANT (unqualified_variant);
7565 TYPE_NEXT_VARIANT (unqualified_variant) = t;
7566 TREE_TYPE (TYPE_BINFO (t)) = t;
7569 /* Cache this pointer-to-member type so that we can find it again
7571 TYPE_SET_PTRMEMFUNC_TYPE (type, t);
7573 if (TYPE_STRUCTURAL_EQUALITY_P (type))
7574 SET_TYPE_STRUCTURAL_EQUALITY (t);
7575 else if (TYPE_CANONICAL (type) != type)
7576 TYPE_CANONICAL (t) = build_ptrmemfunc_type (TYPE_CANONICAL (type));
7581 /* Create and return a pointer to data member type. */
7584 build_ptrmem_type (tree class_type, tree member_type)
7586 if (TREE_CODE (member_type) == METHOD_TYPE)
7588 cp_cv_quals quals = type_memfn_quals (member_type);
7589 member_type = build_memfn_type (member_type, class_type, quals);
7590 return build_ptrmemfunc_type (build_pointer_type (member_type));
7594 gcc_assert (TREE_CODE (member_type) != FUNCTION_TYPE);
7595 return build_offset_type (class_type, member_type);
7599 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
7600 Check to see that the definition is valid. Issue appropriate error
7601 messages. Return 1 if the definition is particularly bad, or 0
7605 check_static_variable_definition (tree decl, tree type)
7607 /* If DECL is declared constexpr, we'll do the appropriate checks
7608 in check_initializer. */
7609 if (DECL_P (decl) && DECL_DECLARED_CONSTEXPR_P (decl))
7611 else if (cxx_dialect >= cxx0x && !INTEGRAL_OR_ENUMERATION_TYPE_P (type))
7613 if (literal_type_p (type))
7614 error ("%<constexpr%> needed for in-class initialization of static "
7615 "data member %q#D of non-integral type", decl);
7617 error ("in-class initialization of static data member %q#D of "
7618 "non-literal type", decl);
7622 /* Motion 10 at San Diego: If a static const integral data member is
7623 initialized with an integral constant expression, the initializer
7624 may appear either in the declaration (within the class), or in
7625 the definition, but not both. If it appears in the class, the
7626 member is a member constant. The file-scope definition is always
7628 if (!ARITHMETIC_TYPE_P (type) && TREE_CODE (type) != ENUMERAL_TYPE)
7630 error ("invalid in-class initialization of static data member "
7631 "of non-integral type %qT",
7635 else if (!CP_TYPE_CONST_P (type))
7636 error ("ISO C++ forbids in-class initialization of non-const "
7637 "static member %qD",
7639 else if (!INTEGRAL_OR_ENUMERATION_TYPE_P (type))
7640 pedwarn (input_location, OPT_pedantic, "ISO C++ forbids initialization of member constant "
7641 "%qD of non-integral type %qT", decl, type);
7646 /* *expr_p is part of the TYPE_SIZE of a variably-sized array. If any
7647 SAVE_EXPRs in *expr_p wrap expressions with side-effects, break those
7648 expressions out into temporary variables so that walk_tree doesn't
7649 step into them (c++/15764). */
7652 stabilize_save_expr_r (tree *expr_p, int *walk_subtrees, void *data)
7654 struct pointer_set_t *pset = (struct pointer_set_t *)data;
7655 tree expr = *expr_p;
7656 if (TREE_CODE (expr) == SAVE_EXPR)
7658 tree op = TREE_OPERAND (expr, 0);
7659 cp_walk_tree (&op, stabilize_save_expr_r, data, pset);
7660 if (TREE_SIDE_EFFECTS (op))
7661 TREE_OPERAND (expr, 0) = get_temp_regvar (TREE_TYPE (op), op);
7664 else if (!EXPR_P (expr) || !TREE_SIDE_EFFECTS (expr))
7669 /* Entry point for the above. */
7672 stabilize_vla_size (tree size)
7674 struct pointer_set_t *pset = pointer_set_create ();
7675 /* Break out any function calls into temporary variables. */
7676 cp_walk_tree (&size, stabilize_save_expr_r, pset, pset);
7679 /* Given the SIZE (i.e., number of elements) in an array, compute an
7680 appropriate index type for the array. If non-NULL, NAME is the
7681 name of the thing being declared. */
7684 compute_array_index_type (tree name, tree size, tsubst_flags_t complain)
7689 tree abi_1_itype = NULL_TREE;
7691 if (error_operand_p (size))
7692 return error_mark_node;
7694 type = TREE_TYPE (size);
7695 /* type_dependent_expression_p? */
7696 if (!dependent_type_p (type))
7698 mark_rvalue_use (size);
7700 if (cxx_dialect < cxx0x && TREE_CODE (size) == NOP_EXPR
7701 && TREE_SIDE_EFFECTS (size))
7702 /* In C++98, we mark a non-constant array bound with a magic
7703 NOP_EXPR with TREE_SIDE_EFFECTS; don't fold in that case. */;
7706 size = fold_non_dependent_expr (size);
7708 if (CLASS_TYPE_P (type)
7709 && CLASSTYPE_LITERAL_P (type))
7711 size = build_expr_type_conversion (WANT_INT, size, true);
7714 if (!(complain & tf_error))
7715 return error_mark_node;
7717 error ("size of array %qD has non-integral type %qT",
7720 error ("size of array has non-integral type %qT", type);
7721 size = integer_one_node;
7723 if (size == error_mark_node)
7724 return error_mark_node;
7725 type = TREE_TYPE (size);
7726 /* We didn't support this case in GCC 3.2, so don't bother
7727 trying to model it now in ABI v1. */
7728 abi_1_itype = error_mark_node;
7731 size = maybe_constant_value (size);
7732 if (!TREE_CONSTANT (size))
7736 if (error_operand_p (size))
7737 return error_mark_node;
7739 /* The array bound must be an integer type. */
7740 if (!INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type))
7742 if (!(complain & tf_error))
7743 return error_mark_node;
7745 error ("size of array %qD has non-integral type %qT", name, type);
7747 error ("size of array has non-integral type %qT", type);
7748 size = integer_one_node;
7749 type = TREE_TYPE (size);
7753 /* A type is dependent if it is...an array type constructed from any
7754 dependent type or whose size is specified by a constant expression
7755 that is value-dependent. */
7756 /* We can only call value_dependent_expression_p on integral constant
7757 expressions; treat non-constant expressions as dependent, too. */
7758 if (processing_template_decl
7759 && (dependent_type_p (type)
7760 || !TREE_CONSTANT (size) || value_dependent_expression_p (size)))
7762 /* We cannot do any checking for a SIZE that isn't known to be
7763 constant. Just build the index type and mark that it requires
7764 structural equality checks. */
7765 itype = build_index_type (build_min (MINUS_EXPR, sizetype,
7766 size, integer_one_node));
7767 TYPE_DEPENDENT_P (itype) = 1;
7768 TYPE_DEPENDENT_P_VALID (itype) = 1;
7769 SET_TYPE_STRUCTURAL_EQUALITY (itype);
7773 if (!abi_version_at_least (2) && processing_template_decl
7774 && abi_1_itype == NULL_TREE)
7775 /* For abi-1, we handled all instances in templates the same way,
7776 even when they were non-dependent. This affects the manglings
7777 produced. So, we do the normal checking for non-dependent
7778 sizes, but at the end we'll return the same type that abi-1
7779 would have, but with TYPE_CANONICAL set to the "right"
7780 value that the current ABI would provide. */
7781 abi_1_itype = build_index_type (build_min (MINUS_EXPR, sizetype,
7782 osize, integer_one_node));
7784 /* Normally, the array-bound will be a constant. */
7785 if (TREE_CODE (size) == INTEGER_CST)
7787 /* Check to see if the array bound overflowed. Make that an
7788 error, no matter how generous we're being. */
7789 constant_expression_error (size);
7791 /* An array must have a positive number of elements. */
7792 if (INT_CST_LT (size, integer_zero_node))
7794 if (!(complain & tf_error))
7795 return error_mark_node;
7797 error ("size of array %qD is negative", name);
7799 error ("size of array is negative");
7800 size = integer_one_node;
7802 /* As an extension we allow zero-sized arrays. */
7803 else if (integer_zerop (size))
7805 if (!(complain & tf_error))
7806 /* We must fail if performing argument deduction (as
7807 indicated by the state of complain), so that
7808 another substitution can be found. */
7809 return error_mark_node;
7810 else if (in_system_header)
7811 /* Allow them in system headers because glibc uses them. */;
7813 pedwarn (input_location, OPT_pedantic, "ISO C++ forbids zero-size array %qD", name);
7815 pedwarn (input_location, OPT_pedantic, "ISO C++ forbids zero-size array");
7818 else if (TREE_CONSTANT (size)
7819 /* We don't allow VLAs at non-function scopes, or during
7820 tentative template substitution. */
7821 || !at_function_scope_p () || !(complain & tf_error))
7823 if (!(complain & tf_error))
7824 return error_mark_node;
7825 /* `(int) &fn' is not a valid array bound. */
7827 error ("size of array %qD is not an integral constant-expression",
7830 error ("size of array is not an integral constant-expression");
7831 size = integer_one_node;
7833 else if (pedantic && warn_vla != 0)
7836 pedwarn (input_location, OPT_Wvla, "ISO C++ forbids variable length array %qD", name);
7838 pedwarn (input_location, OPT_Wvla, "ISO C++ forbids variable length array");
7840 else if (warn_vla > 0)
7844 "variable length array %qD is used", name);
7847 "variable length array is used");
7850 if (processing_template_decl && !TREE_CONSTANT (size))
7851 /* A variable sized array. */
7852 itype = build_min (MINUS_EXPR, sizetype, size, integer_one_node);
7855 HOST_WIDE_INT saved_processing_template_decl;
7857 /* Compute the index of the largest element in the array. It is
7858 one less than the number of elements in the array. We save
7859 and restore PROCESSING_TEMPLATE_DECL so that computations in
7860 cp_build_binary_op will be appropriately folded. */
7861 saved_processing_template_decl = processing_template_decl;
7862 processing_template_decl = 0;
7863 itype = cp_build_binary_op (input_location,
7865 cp_convert (ssizetype, size),
7866 cp_convert (ssizetype, integer_one_node),
7867 tf_warning_or_error);
7868 itype = fold (itype);
7869 processing_template_decl = saved_processing_template_decl;
7871 if (!TREE_CONSTANT (itype))
7872 /* A variable sized array. */
7873 itype = variable_size (itype);
7874 /* Make sure that there was no overflow when creating to a signed
7875 index type. (For example, on a 32-bit machine, an array with
7876 size 2^32 - 1 is too big.) */
7877 else if (TREE_CODE (itype) == INTEGER_CST
7878 && TREE_OVERFLOW (itype))
7880 if (!(complain & tf_error))
7881 return error_mark_node;
7882 error ("overflow in array dimension");
7883 TREE_OVERFLOW (itype) = 0;
7887 /* Create and return the appropriate index type. */
7888 if (abi_1_itype && abi_1_itype != error_mark_node)
7890 tree t = build_index_type (itype);
7891 TYPE_CANONICAL (abi_1_itype) = TYPE_CANONICAL (t);
7892 itype = abi_1_itype;
7895 itype = build_index_type (itype);
7897 /* If the index type were dependent, we would have returned early, so
7898 remember that it isn't. */
7899 TYPE_DEPENDENT_P (itype) = 0;
7900 TYPE_DEPENDENT_P_VALID (itype) = 1;
7904 /* Returns the scope (if any) in which the entity declared by
7905 DECLARATOR will be located. If the entity was declared with an
7906 unqualified name, NULL_TREE is returned. */
7909 get_scope_of_declarator (const cp_declarator *declarator)
7911 while (declarator && declarator->kind != cdk_id)
7912 declarator = declarator->declarator;
7914 /* If the declarator-id is a SCOPE_REF, the scope in which the
7915 declaration occurs is the first operand. */
7917 && declarator->u.id.qualifying_scope)
7918 return declarator->u.id.qualifying_scope;
7920 /* Otherwise, the declarator is not a qualified name; the entity will
7921 be declared in the current scope. */
7925 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
7926 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
7930 create_array_type_for_decl (tree name, tree type, tree size)
7932 tree itype = NULL_TREE;
7934 /* If things have already gone awry, bail now. */
7935 if (type == error_mark_node || size == error_mark_node)
7936 return error_mark_node;
7938 /* If there are some types which cannot be array elements,
7939 issue an error-message and return. */
7940 switch (TREE_CODE (type))
7944 error ("declaration of %qD as array of void", name);
7946 error ("creating array of void");
7947 return error_mark_node;
7951 error ("declaration of %qD as array of functions", name);
7953 error ("creating array of functions");
7954 return error_mark_node;
7956 case REFERENCE_TYPE:
7958 error ("declaration of %qD as array of references", name);
7960 error ("creating array of references");
7961 return error_mark_node;
7965 error ("declaration of %qD as array of function members", name);
7967 error ("creating array of function members");
7968 return error_mark_node;
7976 The constant expressions that specify the bounds of the arrays
7977 can be omitted only for the first member of the sequence. */
7978 if (TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type))
7981 error ("declaration of %qD as multidimensional array must "
7982 "have bounds for all dimensions except the first",
7985 error ("multidimensional array must have bounds for all "
7986 "dimensions except the first");
7988 return error_mark_node;
7991 /* Figure out the index type for the array. */
7993 itype = compute_array_index_type (name, size, tf_warning_or_error);
7996 T is called the array element type; this type shall not be [...] an
7997 abstract class type. */
7998 abstract_virtuals_error (name, type);
8000 return build_cplus_array_type (type, itype);
8003 /* Check that it's OK to declare a function with the indicated TYPE.
8004 SFK indicates the kind of special function (if any) that this
8005 function is. OPTYPE is the type given in a conversion operator
8006 declaration, or the class type for a constructor/destructor.
8007 Returns the actual return type of the function; that
8008 may be different than TYPE if an error occurs, or for certain
8009 special functions. */
8012 check_special_function_return_type (special_function_kind sfk,
8018 case sfk_constructor:
8020 error ("return type specification for constructor invalid");
8022 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
8023 type = build_pointer_type (optype);
8025 type = void_type_node;
8028 case sfk_destructor:
8030 error ("return type specification for destructor invalid");
8031 /* We can't use the proper return type here because we run into
8032 problems with ambiguous bases and covariant returns.
8033 Java classes are left unchanged because (void *) isn't a valid
8034 Java type, and we don't want to change the Java ABI. */
8035 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
8036 type = build_pointer_type (void_type_node);
8038 type = void_type_node;
8041 case sfk_conversion:
8043 error ("return type specified for %<operator %T%>", optype);
8054 /* A variable or data member (whose unqualified name is IDENTIFIER)
8055 has been declared with the indicated TYPE. If the TYPE is not
8056 acceptable, issue an error message and return a type to use for
8057 error-recovery purposes. */
8060 check_var_type (tree identifier, tree type)
8062 if (VOID_TYPE_P (type))
8065 error ("unnamed variable or field declared void");
8066 else if (TREE_CODE (identifier) == IDENTIFIER_NODE)
8068 gcc_assert (!IDENTIFIER_OPNAME_P (identifier));
8069 error ("variable or field %qE declared void", identifier);
8072 error ("variable or field declared void");
8073 type = error_mark_node;
8079 /* Given declspecs and a declarator (abstract or otherwise), determine
8080 the name and type of the object declared and construct a DECL node
8083 DECLSPECS points to the representation of declaration-specifier
8084 sequence that precedes declarator.
8086 DECL_CONTEXT says which syntactic context this declaration is in:
8087 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
8088 FUNCDEF for a function definition. Like NORMAL but a few different
8089 error messages in each case. Return value may be zero meaning
8090 this definition is too screwy to try to parse.
8091 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
8092 handle member functions (which have FIELD context).
8093 Return value may be zero meaning this definition is too screwy to
8095 PARM for a parameter declaration (either within a function prototype
8096 or before a function body). Make a PARM_DECL, or return void_type_node.
8097 TPARM for a template parameter declaration.
8098 CATCHPARM for a parameter declaration before a catch clause.
8099 TYPENAME if for a typename (in a cast or sizeof).
8100 Don't make a DECL node; just return the ..._TYPE node.
8101 FIELD for a struct or union field; make a FIELD_DECL.
8102 BITFIELD for a field with specified width.
8104 INITIALIZED is as for start_decl.
8106 ATTRLIST is a pointer to the list of attributes, which may be NULL
8107 if there are none; *ATTRLIST may be modified if attributes from inside
8108 the declarator should be applied to the declaration.
8110 When this function is called, scoping variables (such as
8111 CURRENT_CLASS_TYPE) should reflect the scope in which the
8112 declaration occurs, not the scope in which the new declaration will
8113 be placed. For example, on:
8117 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
8120 Returns a DECL (if a declarator is present), a TYPE (if there is no
8121 declarator, in cases like "struct S;"), or the ERROR_MARK_NODE if an
8125 grokdeclarator (const cp_declarator *declarator,
8126 const cp_decl_specifier_seq *declspecs,
8127 enum decl_context decl_context,
8131 tree type = NULL_TREE;
8133 int explicit_int128 = 0;
8134 int virtualp, explicitp, friendp, inlinep, staticp;
8135 int explicit_int = 0;
8136 int explicit_char = 0;
8137 int defaulted_int = 0;
8138 tree dependent_name = NULL_TREE;
8140 tree typedef_decl = NULL_TREE;
8141 const char *name = NULL;
8142 tree typedef_type = NULL_TREE;
8143 /* True if this declarator is a function definition. */
8144 bool funcdef_flag = false;
8145 cp_declarator_kind innermost_code = cdk_error;
8148 /* See the code below that used this. */
8149 tree decl_attr = NULL_TREE;
8152 /* Keep track of what sort of function is being processed
8153 so that we can warn about default return values, or explicit
8154 return values which do not match prescribed defaults. */
8155 special_function_kind sfk = sfk_none;
8157 tree dname = NULL_TREE;
8158 tree ctor_return_type = NULL_TREE;
8159 enum overload_flags flags = NO_SPECIAL;
8160 /* cv-qualifiers that apply to the declarator, for a declaration of
8161 a member function. */
8162 cp_cv_quals memfn_quals = TYPE_UNQUALIFIED;
8163 /* virt-specifiers that apply to the declarator, for a declaration of
8164 a member function. */
8165 cp_virt_specifiers virt_specifiers = VIRT_SPEC_UNSPECIFIED;
8166 /* cv-qualifiers that apply to the type specified by the DECLSPECS. */
8168 tree raises = NULL_TREE;
8169 int template_count = 0;
8170 tree returned_attrs = NULL_TREE;
8171 tree parms = NULL_TREE;
8172 const cp_declarator *id_declarator;
8173 /* The unqualified name of the declarator; either an
8174 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
8175 tree unqualified_id;
8176 /* The class type, if any, in which this entity is located,
8177 or NULL_TREE if none. Note that this value may be different from
8178 the current class type; for example if an attempt is made to declare
8179 "A::f" inside "B", this value will be "A". */
8180 tree ctype = current_class_type;
8181 /* The NAMESPACE_DECL for the namespace in which this entity is
8182 located. If an unqualified name is used to declare the entity,
8183 this value will be NULL_TREE, even if the entity is located at
8185 tree in_namespace = NULL_TREE;
8186 cp_storage_class storage_class;
8187 bool unsigned_p, signed_p, short_p, long_p, thread_p;
8188 bool type_was_error_mark_node = false;
8189 bool parameter_pack_p = declarator? declarator->parameter_pack_p : false;
8190 bool template_type_arg = false;
8191 bool template_parm_flag = false;
8192 bool constexpr_p = declspecs->specs[(int) ds_constexpr];
8195 signed_p = declspecs->specs[(int)ds_signed];
8196 unsigned_p = declspecs->specs[(int)ds_unsigned];
8197 short_p = declspecs->specs[(int)ds_short];
8198 long_p = declspecs->specs[(int)ds_long];
8199 longlong = declspecs->specs[(int)ds_long] >= 2;
8200 explicit_int128 = declspecs->explicit_int128_p;
8201 thread_p = declspecs->specs[(int)ds_thread];
8203 if (decl_context == FUNCDEF)
8204 funcdef_flag = true, decl_context = NORMAL;
8205 else if (decl_context == MEMFUNCDEF)
8206 funcdef_flag = true, decl_context = FIELD;
8207 else if (decl_context == BITFIELD)
8208 bitfield = 1, decl_context = FIELD;
8209 else if (decl_context == TEMPLATE_TYPE_ARG)
8210 template_type_arg = true, decl_context = TYPENAME;
8211 else if (decl_context == TPARM)
8212 template_parm_flag = true, decl_context = PARM;
8214 if (initialized > 1)
8215 funcdef_flag = true;
8217 /* Look inside a declarator for the name being declared
8218 and get it as a string, for an error message. */
8219 for (id_declarator = declarator;
8221 id_declarator = id_declarator->declarator)
8223 if (id_declarator->kind != cdk_id)
8224 innermost_code = id_declarator->kind;
8226 switch (id_declarator->kind)
8229 if (id_declarator->declarator
8230 && id_declarator->declarator->kind == cdk_id)
8232 sfk = id_declarator->declarator->u.id.sfk;
8233 if (sfk == sfk_destructor)
8240 tree qualifying_scope = id_declarator->u.id.qualifying_scope;
8241 tree decl = id_declarator->u.id.unqualified_name;
8244 if (qualifying_scope)
8246 if (at_function_scope_p ())
8250 A declarator-id shall not be qualified except
8253 None of the cases are permitted in block
8255 if (qualifying_scope == global_namespace)
8256 error ("invalid use of qualified-name %<::%D%>",
8258 else if (TYPE_P (qualifying_scope))
8259 error ("invalid use of qualified-name %<%T::%D%>",
8260 qualifying_scope, decl);
8262 error ("invalid use of qualified-name %<%D::%D%>",
8263 qualifying_scope, decl);
8264 return error_mark_node;
8266 else if (TYPE_P (qualifying_scope))
8268 ctype = qualifying_scope;
8269 if (innermost_code != cdk_function
8270 && current_class_type
8271 && !UNIQUELY_DERIVED_FROM_P (ctype,
8272 current_class_type))
8274 error ("type %qT is not derived from type %qT",
8275 ctype, current_class_type);
8276 return error_mark_node;
8279 else if (TREE_CODE (qualifying_scope) == NAMESPACE_DECL)
8280 in_namespace = qualifying_scope;
8282 switch (TREE_CODE (decl))
8288 if (innermost_code != cdk_function)
8290 error ("declaration of %qD as non-function", decl);
8291 return error_mark_node;
8293 else if (!qualifying_scope
8294 && !(current_class_type && at_class_scope_p ()))
8296 error ("declaration of %qD as non-member", decl);
8297 return error_mark_node;
8300 type = TREE_OPERAND (decl, 0);
8302 type = constructor_name (type);
8303 name = identifier_to_locale (IDENTIFIER_POINTER (type));
8308 case TEMPLATE_ID_EXPR:
8310 tree fns = TREE_OPERAND (decl, 0);
8313 if (TREE_CODE (dname) != IDENTIFIER_NODE)
8315 gcc_assert (is_overloaded_fn (dname));
8316 dname = DECL_NAME (get_first_fn (dname));
8321 case IDENTIFIER_NODE:
8322 if (TREE_CODE (decl) == IDENTIFIER_NODE)
8325 if (C_IS_RESERVED_WORD (dname))
8327 error ("declarator-id missing; using reserved word %qD",
8329 name = identifier_to_locale (IDENTIFIER_POINTER (dname));
8331 else if (!IDENTIFIER_TYPENAME_P (dname))
8332 name = identifier_to_locale (IDENTIFIER_POINTER (dname));
8335 gcc_assert (flags == NO_SPECIAL);
8336 flags = TYPENAME_FLAG;
8337 ctor_return_type = TREE_TYPE (dname);
8338 sfk = sfk_conversion;
8339 if (is_typename_at_global_scope (dname))
8340 name = identifier_to_locale (IDENTIFIER_POINTER (dname));
8342 name = "<invalid operator>";
8359 return error_mark_node;
8364 if (id_declarator->kind == cdk_id)
8370 The declarator in a function-definition shall have the form
8371 D1 ( parameter-declaration-clause) ... */
8372 if (funcdef_flag && innermost_code != cdk_function)
8374 error ("function definition does not declare parameters");
8375 return error_mark_node;
8378 if (((dname && IDENTIFIER_OPNAME_P (dname)) || flags == TYPENAME_FLAG)
8379 && innermost_code != cdk_function
8380 && ! (ctype && !declspecs->any_specifiers_p))
8382 error ("declaration of %qD as non-function", dname);
8383 return error_mark_node;
8386 /* Anything declared one level down from the top level
8387 must be one of the parameters of a function
8388 (because the body is at least two levels down). */
8390 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
8391 by not allowing C++ class definitions to specify their parameters
8392 with xdecls (must be spec.d in the parmlist).
8394 Since we now wait to push a class scope until we are sure that
8395 we are in a legitimate method context, we must set oldcname
8396 explicitly (since current_class_name is not yet alive).
8398 We also want to avoid calling this a PARM if it is in a namespace. */
8400 if (decl_context == NORMAL && !toplevel_bindings_p ())
8402 struct cp_binding_level *b = current_binding_level;
8403 current_binding_level = b->level_chain;
8404 if (current_binding_level != 0 && toplevel_bindings_p ())
8405 decl_context = PARM;
8406 current_binding_level = b;
8410 name = decl_context == PARM ? "parameter" : "type name";
8412 if (constexpr_p && declspecs->specs[(int)ds_typedef])
8414 error ("%<constexpr%> cannot appear in a typedef declaration");
8415 return error_mark_node;
8418 /* If there were multiple types specified in the decl-specifier-seq,
8419 issue an error message. */
8420 if (declspecs->multiple_types_p)
8422 error ("two or more data types in declaration of %qs", name);
8423 return error_mark_node;
8426 if (declspecs->conflicting_specifiers_p)
8428 error ("conflicting specifiers in declaration of %qs", name);
8429 return error_mark_node;
8432 /* Extract the basic type from the decl-specifier-seq. */
8433 type = declspecs->type;
8434 if (type == error_mark_node)
8437 type_was_error_mark_node = true;
8439 /* If the entire declaration is itself tagged as deprecated then
8440 suppress reports of deprecated items. */
8441 if (type && TREE_DEPRECATED (type)
8442 && deprecated_state != DEPRECATED_SUPPRESS)
8443 warn_deprecated_use (type, NULL_TREE);
8444 if (type && TREE_CODE (type) == TYPE_DECL)
8446 typedef_decl = type;
8447 type = TREE_TYPE (typedef_decl);
8448 if (TREE_DEPRECATED (type)
8449 && DECL_ARTIFICIAL (typedef_decl)
8450 && deprecated_state != DEPRECATED_SUPPRESS)
8451 warn_deprecated_use (type, NULL_TREE);
8453 /* No type at all: default to `int', and set DEFAULTED_INT
8454 because it was not a user-defined typedef. */
8455 if (type == NULL_TREE && (signed_p || unsigned_p || long_p || short_p))
8457 /* These imply 'int'. */
8458 type = integer_type_node;
8462 explicit_int = declspecs->explicit_int_p;
8463 explicit_char = declspecs->explicit_char_p;
8466 /* See the code below that used this. */
8468 decl_attr = DECL_ATTRIBUTES (typedef_decl);
8470 typedef_type = type;
8473 if (sfk != sfk_conversion)
8474 ctor_return_type = ctype;
8476 if (sfk != sfk_none)
8477 type = check_special_function_return_type (sfk, type,
8479 else if (type == NULL_TREE)
8485 /* We handle `main' specially here, because 'main () { }' is so
8486 common. With no options, it is allowed. With -Wreturn-type,
8487 it is a warning. It is only an error with -pedantic-errors. */
8488 is_main = (funcdef_flag
8489 && dname && TREE_CODE (dname) == IDENTIFIER_NODE
8490 && MAIN_NAME_P (dname)
8491 && ctype == NULL_TREE
8492 && in_namespace == NULL_TREE
8493 && current_namespace == global_namespace);
8495 if (type_was_error_mark_node)
8496 /* We've already issued an error, don't complain more. */;
8497 else if (in_system_header || flag_ms_extensions)
8498 /* Allow it, sigh. */;
8500 permerror (input_location, "ISO C++ forbids declaration of %qs with no type", name);
8502 pedwarn (input_location, OPT_pedantic,
8503 "ISO C++ forbids declaration of %qs with no type", name);
8505 warning (OPT_Wreturn_type,
8506 "ISO C++ forbids declaration of %qs with no type", name);
8508 type = integer_type_node;
8513 /* Now process the modifiers that were specified
8514 and check for invalid combinations. */
8516 /* Long double is a special combination. */
8517 if (long_p && !longlong && TYPE_MAIN_VARIANT (type) == double_type_node)
8520 type = cp_build_qualified_type (long_double_type_node,
8521 cp_type_quals (type));
8524 /* Check all other uses of type modifiers. */
8526 if (unsigned_p || signed_p || long_p || short_p)
8530 if ((signed_p || unsigned_p) && TREE_CODE (type) != INTEGER_TYPE)
8531 error ("%<signed%> or %<unsigned%> invalid for %qs", name);
8532 else if (signed_p && unsigned_p)
8533 error ("%<signed%> and %<unsigned%> specified together for %qs", name);
8534 else if (longlong && TREE_CODE (type) != INTEGER_TYPE)
8535 error ("%<long long%> invalid for %qs", name);
8536 else if (explicit_int128 && TREE_CODE (type) != INTEGER_TYPE)
8537 error ("%<__int128%> invalid for %qs", name);
8538 else if (long_p && TREE_CODE (type) == REAL_TYPE)
8539 error ("%<long%> invalid for %qs", name);
8540 else if (short_p && TREE_CODE (type) == REAL_TYPE)
8541 error ("%<short%> invalid for %qs", name);
8542 else if ((long_p || short_p) && TREE_CODE (type) != INTEGER_TYPE)
8543 error ("%<long%> or %<short%> invalid for %qs", name);
8544 else if ((long_p || short_p || explicit_char || explicit_int) && explicit_int128)
8545 error ("%<long%>, %<int%>, %<short%>, or %<char%> invalid for %qs", name);
8546 else if ((long_p || short_p) && explicit_char)
8547 error ("%<long%> or %<short%> specified with char for %qs", name);
8548 else if (long_p && short_p)
8549 error ("%<long%> and %<short%> specified together for %qs", name);
8550 else if (type == char16_type_node || type == char32_type_node)
8552 if (signed_p || unsigned_p)
8553 error ("%<signed%> or %<unsigned%> invalid for %qs", name);
8554 else if (short_p || long_p)
8555 error ("%<short%> or %<long%> invalid for %qs", name);
8560 if (!explicit_int && !defaulted_int && !explicit_char && !explicit_int128 && pedantic)
8562 pedwarn (input_location, OPT_pedantic,
8563 "long, short, signed or unsigned used invalidly for %qs",
8565 if (flag_pedantic_errors)
8568 if (explicit_int128)
8570 if (int128_integer_type_node == NULL_TREE)
8572 error ("%<__int128%> is not supported by this target");
8577 pedwarn (input_location, OPT_pedantic,
8578 "ISO C++ does not support %<__int128%> for %qs",
8580 if (flag_pedantic_errors)
8586 /* Discard the type modifiers if they are invalid. */
8594 explicit_int128 = false;
8598 /* Decide whether an integer type is signed or not.
8599 Optionally treat bitfields as signed by default. */
8603 It is implementation-defined whether a plain (neither
8604 explicitly signed or unsigned) char, short, int, or long
8605 bit-field is signed or unsigned.
8607 Naturally, we extend this to long long as well. Note that
8608 this does not include wchar_t. */
8609 || (bitfield && !flag_signed_bitfields
8611 /* A typedef for plain `int' without `signed' can be
8612 controlled just like plain `int', but a typedef for
8613 `signed int' cannot be so controlled. */
8615 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl))
8616 && TREE_CODE (type) == INTEGER_TYPE
8617 && !same_type_p (TYPE_MAIN_VARIANT (type), wchar_type_node)))
8619 if (explicit_int128)
8620 type = int128_unsigned_type_node;
8622 type = long_long_unsigned_type_node;
8624 type = long_unsigned_type_node;
8626 type = short_unsigned_type_node;
8627 else if (type == char_type_node)
8628 type = unsigned_char_type_node;
8629 else if (typedef_decl)
8630 type = unsigned_type_for (type);
8632 type = unsigned_type_node;
8634 else if (signed_p && type == char_type_node)
8635 type = signed_char_type_node;
8636 else if (explicit_int128)
8637 type = int128_integer_type_node;
8639 type = long_long_integer_type_node;
8641 type = long_integer_type_node;
8643 type = short_integer_type_node;
8645 if (declspecs->specs[(int)ds_complex])
8647 if (TREE_CODE (type) != INTEGER_TYPE && TREE_CODE (type) != REAL_TYPE)
8648 error ("complex invalid for %qs", name);
8649 /* If we just have "complex", it is equivalent to
8650 "complex double", but if any modifiers at all are specified it is
8651 the complex form of TYPE. E.g, "complex short" is
8652 "complex short int". */
8653 else if (defaulted_int && ! longlong && ! explicit_int128
8654 && ! (long_p || short_p || signed_p || unsigned_p))
8655 type = complex_double_type_node;
8656 else if (type == integer_type_node)
8657 type = complex_integer_type_node;
8658 else if (type == float_type_node)
8659 type = complex_float_type_node;
8660 else if (type == double_type_node)
8661 type = complex_double_type_node;
8662 else if (type == long_double_type_node)
8663 type = complex_long_double_type_node;
8665 type = build_complex_type (type);
8668 type_quals = TYPE_UNQUALIFIED;
8669 if (declspecs->specs[(int)ds_const])
8670 type_quals |= TYPE_QUAL_CONST;
8671 if (declspecs->specs[(int)ds_volatile])
8672 type_quals |= TYPE_QUAL_VOLATILE;
8673 if (declspecs->specs[(int)ds_restrict])
8674 type_quals |= TYPE_QUAL_RESTRICT;
8675 if (sfk == sfk_conversion && type_quals != TYPE_UNQUALIFIED)
8676 error ("qualifiers are not allowed on declaration of %<operator %T%>",
8679 type_quals |= cp_type_quals (type);
8680 type = cp_build_qualified_type_real
8681 (type, type_quals, ((typedef_decl && !DECL_ARTIFICIAL (typedef_decl)
8682 ? tf_ignore_bad_quals : 0) | tf_warning_or_error));
8683 /* We might have ignored or rejected some of the qualifiers. */
8684 type_quals = cp_type_quals (type);
8687 inlinep = !! declspecs->specs[(int)ds_inline];
8688 virtualp = !! declspecs->specs[(int)ds_virtual];
8689 explicitp = !! declspecs->specs[(int)ds_explicit];
8691 storage_class = declspecs->storage_class;
8692 if (storage_class == sc_static)
8693 staticp = 1 + (decl_context == FIELD);
8695 if (virtualp && staticp == 2)
8697 error ("member %qD cannot be declared both virtual and static", dname);
8698 storage_class = sc_none;
8701 friendp = !! declspecs->specs[(int)ds_friend];
8703 if (dependent_name && !friendp)
8705 error ("%<%T::%D%> is not a valid declarator", ctype, dependent_name);
8706 return error_mark_node;
8709 /* Issue errors about use of storage classes for parameters. */
8710 if (decl_context == PARM)
8712 if (declspecs->specs[(int)ds_typedef])
8714 error ("typedef declaration invalid in parameter declaration");
8715 return error_mark_node;
8717 else if (template_parm_flag && storage_class != sc_none)
8719 error ("storage class specified for template parameter %qs", name);
8720 return error_mark_node;
8722 else if (storage_class == sc_static
8723 || storage_class == sc_extern
8725 error ("storage class specifiers invalid in parameter declarations");
8727 if (type_uses_auto (type))
8729 error ("parameter declared %<auto%>");
8730 type = error_mark_node;
8733 /* Function parameters cannot be constexpr. If we saw one, moan
8734 and pretend it wasn't there. */
8737 error ("a parameter cannot be declared %<constexpr%>");
8742 /* Give error if `virtual' is used outside of class declaration. */
8744 && (current_class_name == NULL_TREE || decl_context != FIELD))
8746 error ("%<virtual%> outside class declaration");
8750 /* Static anonymous unions are dealt with here. */
8751 if (staticp && decl_context == TYPENAME
8753 && ANON_AGGR_TYPE_P (declspecs->type))
8754 decl_context = FIELD;
8756 /* Warn about storage classes that are invalid for certain
8757 kinds of declarations (parameters, typenames, etc.). */
8760 && storage_class != sc_extern
8761 && storage_class != sc_static)
8762 || declspecs->specs[(int)ds_typedef]))
8764 error ("multiple storage classes in declaration of %qs", name);
8767 if (decl_context != NORMAL
8768 && ((storage_class != sc_none
8769 && storage_class != sc_mutable)
8772 if ((decl_context == PARM || decl_context == CATCHPARM)
8773 && (storage_class == sc_register
8774 || storage_class == sc_auto))
8776 else if (declspecs->specs[(int)ds_typedef])
8778 else if (decl_context == FIELD
8779 /* C++ allows static class elements. */
8780 && storage_class == sc_static)
8781 /* C++ also allows inlines and signed and unsigned elements,
8782 but in those cases we don't come in here. */
8786 if (decl_context == FIELD)
8787 error ("storage class specified for %qs", name);
8790 if (decl_context == PARM || decl_context == CATCHPARM)
8791 error ("storage class specified for parameter %qs", name);
8793 error ("storage class specified for typename");
8795 if (storage_class == sc_register
8796 || storage_class == sc_auto
8797 || storage_class == sc_extern
8799 storage_class = sc_none;
8802 else if (storage_class == sc_extern && funcdef_flag
8803 && ! toplevel_bindings_p ())
8804 error ("nested function %qs declared %<extern%>", name);
8805 else if (toplevel_bindings_p ())
8807 if (storage_class == sc_auto)
8808 error ("top-level declaration of %qs specifies %<auto%>", name);
8811 && storage_class != sc_extern
8812 && storage_class != sc_static)
8814 error ("function-scope %qs implicitly auto and declared %<__thread%>",
8819 if (storage_class && friendp)
8821 error ("storage class specifiers invalid in friend function declarations");
8822 storage_class = sc_none;
8827 unqualified_id = NULL_TREE;
8830 unqualified_id = id_declarator->u.id.unqualified_name;
8831 switch (TREE_CODE (unqualified_id))
8834 unqualified_id = TREE_OPERAND (unqualified_id, 0);
8835 if (TYPE_P (unqualified_id))
8836 unqualified_id = constructor_name (unqualified_id);
8839 case IDENTIFIER_NODE:
8840 case TEMPLATE_ID_EXPR:
8848 /* Determine the type of the entity declared by recurring on the
8850 for (; declarator; declarator = declarator->declarator)
8852 const cp_declarator *inner_declarator;
8855 if (type == error_mark_node)
8856 return error_mark_node;
8858 attrs = declarator->attributes;
8864 if (declarator == NULL || declarator->kind == cdk_id)
8865 attr_flags |= (int) ATTR_FLAG_DECL_NEXT;
8866 if (declarator->kind == cdk_function)
8867 attr_flags |= (int) ATTR_FLAG_FUNCTION_NEXT;
8868 if (declarator->kind == cdk_array)
8869 attr_flags |= (int) ATTR_FLAG_ARRAY_NEXT;
8870 returned_attrs = decl_attributes (&type,
8871 chainon (returned_attrs, attrs),
8875 if (declarator->kind == cdk_id)
8878 inner_declarator = declarator->declarator;
8880 switch (declarator->kind)
8883 type = create_array_type_for_decl (dname, type,
8884 declarator->u.array.bounds);
8892 /* Declaring a function type.
8893 Make sure we have a valid type for the function to return. */
8895 if (type_quals != TYPE_UNQUALIFIED)
8897 if (SCALAR_TYPE_P (type) || VOID_TYPE_P (type))
8898 warning (OPT_Wignored_qualifiers,
8899 "type qualifiers ignored on function return type");
8900 /* We now know that the TYPE_QUALS don't apply to the
8901 decl, but to its return type. */
8902 type_quals = TYPE_UNQUALIFIED;
8904 errmsg = targetm.invalid_return_type (type);
8908 type = integer_type_node;
8911 /* Error about some types functions can't return. */
8913 if (TREE_CODE (type) == FUNCTION_TYPE)
8915 error ("%qs declared as function returning a function", name);
8916 return error_mark_node;
8918 if (TREE_CODE (type) == ARRAY_TYPE)
8920 error ("%qs declared as function returning an array", name);
8921 return error_mark_node;
8924 /* Pick up type qualifiers which should be applied to `this'. */
8925 memfn_quals = declarator->u.function.qualifiers;
8926 /* Pick up virt-specifiers. */
8927 virt_specifiers = declarator->u.function.virt_specifiers;
8928 /* Pick up the exception specifications. */
8929 raises = declarator->u.function.exception_specification;
8931 /* Say it's a definition only for the CALL_EXPR
8932 closest to the identifier. */
8933 funcdecl_p = inner_declarator && inner_declarator->kind == cdk_id;
8935 /* Handle a late-specified return type. */
8938 if (type_uses_auto (type))
8940 if (!declarator->u.function.late_return_type)
8942 error ("%qs function uses %<auto%> type specifier without"
8943 " late return type", name);
8944 return error_mark_node;
8946 else if (!is_auto (type))
8948 error ("%qs function with late return type has"
8949 " %qT as its type rather than plain %<auto%>",
8951 return error_mark_node;
8954 else if (declarator->u.function.late_return_type)
8956 error ("%qs function with late return type not declared"
8957 " with %<auto%> type specifier", name);
8958 return error_mark_node;
8961 type = splice_late_return_type
8962 (type, declarator->u.function.late_return_type);
8963 if (type == error_mark_node)
8964 return error_mark_node;
8966 if (ctype == NULL_TREE
8967 && decl_context == FIELD
8969 && (friendp == 0 || dname == current_class_name))
8970 ctype = current_class_type;
8972 if (ctype && (sfk == sfk_constructor
8973 || sfk == sfk_destructor))
8975 /* We are within a class's scope. If our declarator name
8976 is the same as the class name, and we are defining
8977 a function, then it is a constructor/destructor, and
8978 therefore returns a void type. */
8980 /* ISO C++ 12.4/2. A destructor may not be declared
8981 const or volatile. A destructor may not be
8984 ISO C++ 12.1. A constructor may not be declared
8985 const or volatile. A constructor may not be
8986 virtual. A constructor may not be static. */
8988 error ((flags == DTOR_FLAG)
8989 ? "destructor cannot be static member function"
8990 : "constructor cannot be static member function");
8993 error ((flags == DTOR_FLAG)
8994 ? "destructors may not be cv-qualified"
8995 : "constructors may not be cv-qualified");
8996 memfn_quals = TYPE_UNQUALIFIED;
8999 if (decl_context == FIELD
9000 && !member_function_or_else (ctype,
9003 return error_mark_node;
9005 if (flags != DTOR_FLAG)
9007 /* It's a constructor. */
9012 permerror (input_location, "constructors cannot be declared virtual");
9015 if (decl_context == FIELD
9016 && sfk != sfk_constructor)
9017 return error_mark_node;
9019 if (decl_context == FIELD)
9025 error ("can%'t initialize friend function %qs", name);
9028 /* Cannot be both friend and virtual. */
9029 error ("virtual functions cannot be friends");
9032 if (decl_context == NORMAL)
9033 error ("friend declaration not in class definition");
9034 if (current_function_decl && funcdef_flag)
9035 error ("can%'t define friend function %qs in a local "
9039 else if (ctype && sfk == sfk_conversion)
9043 maybe_warn_cpp0x (CPP0X_EXPLICIT_CONVERSION);
9048 arg_types = grokparms (declarator->u.function.parameters,
9051 if (inner_declarator
9052 && inner_declarator->kind == cdk_id
9053 && inner_declarator->u.id.sfk == sfk_destructor
9054 && arg_types != void_list_node)
9056 error ("destructors may not have parameters");
9057 arg_types = void_list_node;
9061 type = build_function_type (type, arg_types);
9068 /* Filter out pointers-to-references and references-to-references.
9069 We can get these if a TYPE_DECL is used. */
9071 if (TREE_CODE (type) == REFERENCE_TYPE)
9073 if (declarator->kind != cdk_reference)
9075 error ("cannot declare pointer to %q#T", type);
9076 type = TREE_TYPE (type);
9079 /* In C++0x, we allow reference to reference declarations
9080 that occur indirectly through typedefs [7.1.3/8 dcl.typedef]
9081 and template type arguments [14.3.1/4 temp.arg.type]. The
9082 check for direct reference to reference declarations, which
9083 are still forbidden, occurs below. Reasoning behind the change
9084 can be found in DR106, DR540, and the rvalue reference
9086 else if (cxx_dialect == cxx98)
9088 error ("cannot declare reference to %q#T", type);
9089 type = TREE_TYPE (type);
9092 else if (VOID_TYPE_P (type))
9094 if (declarator->kind == cdk_reference)
9095 error ("cannot declare reference to %q#T", type);
9096 else if (declarator->kind == cdk_ptrmem)
9097 error ("cannot declare pointer to %q#T member", type);
9100 /* We now know that the TYPE_QUALS don't apply to the decl,
9101 but to the target of the pointer. */
9102 type_quals = TYPE_UNQUALIFIED;
9104 if (declarator->kind == cdk_ptrmem
9105 && (TREE_CODE (type) == FUNCTION_TYPE
9106 || (memfn_quals && TREE_CODE (type) == METHOD_TYPE)))
9108 memfn_quals |= type_memfn_quals (type);
9109 type = build_memfn_type (type,
9110 declarator->u.pointer.class_type,
9112 if (type == error_mark_node)
9113 return error_mark_node;
9114 memfn_quals = TYPE_UNQUALIFIED;
9117 if (TREE_CODE (type) == FUNCTION_TYPE
9118 && type_memfn_quals (type) != TYPE_UNQUALIFIED)
9119 error (declarator->kind == cdk_reference
9120 ? G_("cannot declare reference to qualified function type %qT")
9121 : G_("cannot declare pointer to qualified function type %qT"),
9124 /* When the pointed-to type involves components of variable size,
9125 care must be taken to ensure that the size evaluation code is
9126 emitted early enough to dominate all the possible later uses
9127 and late enough for the variables on which it depends to have
9130 This is expected to happen automatically when the pointed-to
9131 type has a name/declaration of it's own, but special attention
9132 is required if the type is anonymous.
9134 We handle the NORMAL and FIELD contexts here by inserting a
9135 dummy statement that just evaluates the size at a safe point
9136 and ensures it is not deferred until e.g. within a deeper
9137 conditional context (c++/43555).
9139 We expect nothing to be needed here for PARM or TYPENAME.
9140 Evaluating the size at this point for TYPENAME would
9141 actually be incorrect, as we might be in the middle of an
9142 expression with side effects on the pointed-to type size
9143 "arguments" prior to the pointer declaration point and the
9144 size evaluation could end up prior to the side effects. */
9146 if (!TYPE_NAME (type)
9147 && (decl_context == NORMAL || decl_context == FIELD)
9148 && at_function_scope_p ()
9149 && variably_modified_type_p (type, NULL_TREE))
9151 /* First break out any side-effects. */
9152 stabilize_vla_size (TYPE_SIZE (type));
9153 /* And then force evaluation of the SAVE_EXPR. */
9154 finish_expr_stmt (TYPE_SIZE (type));
9157 if (declarator->kind == cdk_reference)
9159 /* In C++0x, the type we are creating a reference to might be
9160 a typedef which is itself a reference type. In that case,
9161 we follow the reference collapsing rules in
9162 [7.1.3/8 dcl.typedef] to create the final reference type:
9164 "If a typedef TD names a type that is a reference to a type
9165 T, an attempt to create the type 'lvalue reference to cv TD'
9166 creates the type 'lvalue reference to T,' while an attempt
9167 to create the type "rvalue reference to cv TD' creates the
9170 if (!VOID_TYPE_P (type))
9171 type = cp_build_reference_type
9172 ((TREE_CODE (type) == REFERENCE_TYPE
9173 ? TREE_TYPE (type) : type),
9174 (declarator->u.reference.rvalue_ref
9175 && (TREE_CODE(type) != REFERENCE_TYPE
9176 || TYPE_REF_IS_RVALUE (type))));
9178 /* In C++0x, we need this check for direct reference to
9179 reference declarations, which are forbidden by
9180 [8.3.2/5 dcl.ref]. Reference to reference declarations
9181 are only allowed indirectly through typedefs and template
9182 type arguments. Example:
9184 void foo(int & &); // invalid ref-to-ref decl
9186 typedef int & int_ref;
9187 void foo(int_ref &); // valid ref-to-ref decl
9189 if (inner_declarator && inner_declarator->kind == cdk_reference)
9190 error ("cannot declare reference to %q#T, which is not "
9191 "a typedef or a template type argument", type);
9193 else if (TREE_CODE (type) == METHOD_TYPE)
9194 type = build_ptrmemfunc_type (build_pointer_type (type));
9195 else if (declarator->kind == cdk_ptrmem)
9197 gcc_assert (TREE_CODE (declarator->u.pointer.class_type)
9199 if (declarator->u.pointer.class_type == error_mark_node)
9200 /* We will already have complained. */
9201 type = error_mark_node;
9203 type = build_ptrmem_type (declarator->u.pointer.class_type,
9207 type = build_pointer_type (type);
9209 /* Process a list of type modifier keywords (such as
9210 const or volatile) that were given inside the `*' or `&'. */
9212 if (declarator->u.pointer.qualifiers)
9215 = cp_build_qualified_type (type,
9216 declarator->u.pointer.qualifiers);
9217 type_quals = cp_type_quals (type);
9230 /* We need to stabilize side-effects in VLA sizes for regular array
9231 declarations too, not just pointers to arrays. */
9232 if (type != error_mark_node && !TYPE_NAME (type)
9233 && (decl_context == NORMAL || decl_context == FIELD)
9234 && at_function_scope_p ()
9235 && variably_modified_type_p (type, NULL_TREE))
9236 stabilize_vla_size (TYPE_SIZE (type));
9238 /* A `constexpr' specifier used in an object declaration declares
9239 the object as `const'. */
9240 if (constexpr_p && innermost_code != cdk_function)
9242 if (type_quals & TYPE_QUAL_CONST)
9243 error ("both %<const%> and %<constexpr%> cannot be used here");
9244 if (type_quals & TYPE_QUAL_VOLATILE)
9245 error ("both %<volatile%> and %<constexpr%> cannot be used here");
9246 type_quals |= TYPE_QUAL_CONST;
9247 type = cp_build_qualified_type (type, type_quals);
9250 if (unqualified_id && TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR
9251 && TREE_CODE (type) != FUNCTION_TYPE
9252 && TREE_CODE (type) != METHOD_TYPE)
9254 error ("template-id %qD used as a declarator",
9256 unqualified_id = dname;
9259 /* If TYPE is a FUNCTION_TYPE, but the function name was explicitly
9260 qualified with a class-name, turn it into a METHOD_TYPE, unless
9261 we know that the function is static. We take advantage of this
9262 opportunity to do other processing that pertains to entities
9263 explicitly declared to be class members. Note that if DECLARATOR
9264 is non-NULL, we know it is a cdk_id declarator; otherwise, we
9265 would not have exited the loop above. */
9267 && declarator->u.id.qualifying_scope
9268 && TYPE_P (declarator->u.id.qualifying_scope))
9272 ctype = declarator->u.id.qualifying_scope;
9273 ctype = TYPE_MAIN_VARIANT (ctype);
9275 while (t != NULL_TREE && CLASS_TYPE_P (t))
9277 /* You're supposed to have one `template <...>' for every
9278 template class, but you don't need one for a full
9279 specialization. For example:
9281 template <class T> struct S{};
9282 template <> struct S<int> { void f(); };
9283 void S<int>::f () {}
9285 is correct; there shouldn't be a `template <>' for the
9286 definition of `S<int>::f'. */
9287 if (CLASSTYPE_TEMPLATE_SPECIALIZATION (t)
9288 && !any_dependent_template_arguments_p (CLASSTYPE_TI_ARGS (t)))
9289 /* T is an explicit (not partial) specialization. All
9290 containing classes must therefore also be explicitly
9293 if ((CLASSTYPE_USE_TEMPLATE (t) || CLASSTYPE_IS_TEMPLATE (t))
9294 && PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (t)))
9295 template_count += 1;
9297 t = TYPE_MAIN_DECL (t);
9298 t = DECL_CONTEXT (t);
9301 if (ctype == current_class_type)
9305 permerror (input_location, "member functions are implicitly friends of their class");
9309 permerror (declarator->id_loc,
9310 "extra qualification %<%T::%> on member %qs",
9313 else if (/* If the qualifying type is already complete, then we
9314 can skip the following checks. */
9315 !COMPLETE_TYPE_P (ctype)
9316 && (/* If the function is being defined, then
9317 qualifying type must certainly be complete. */
9319 /* A friend declaration of "T::f" is OK, even if
9320 "T" is a template parameter. But, if this
9321 function is not a friend, the qualifying type
9323 || (!friendp && !CLASS_TYPE_P (ctype))
9324 /* For a declaration, the type need not be
9325 complete, if either it is dependent (since there
9326 is no meaningful definition of complete in that
9327 case) or the qualifying class is currently being
9329 || !(dependent_type_p (ctype)
9330 || currently_open_class (ctype)))
9331 /* Check that the qualifying type is complete. */
9332 && !complete_type_or_else (ctype, NULL_TREE))
9333 return error_mark_node;
9334 else if (TREE_CODE (type) == FUNCTION_TYPE)
9336 if (current_class_type
9337 && (!friendp || funcdef_flag))
9340 ? "cannot define member function %<%T::%s%> within %<%T%>"
9341 : "cannot declare member function %<%T::%s%> within %<%T%>",
9342 ctype, name, current_class_type);
9343 return error_mark_node;
9346 else if (declspecs->specs[(int)ds_typedef]
9347 && current_class_type)
9349 error ("cannot declare member %<%T::%s%> within %qT",
9350 ctype, name, current_class_type);
9351 return error_mark_node;
9355 if (ctype == NULL_TREE && decl_context == FIELD && friendp == 0)
9356 ctype = current_class_type;
9358 /* A constexpr non-static member function is implicitly const. */
9359 if (constexpr_p && ctype && staticp == 0
9360 && TREE_CODE (type) == FUNCTION_TYPE
9361 && sfk != sfk_constructor && sfk != sfk_destructor)
9362 memfn_quals |= TYPE_QUAL_CONST;
9364 /* Now TYPE has the actual type. */
9369 *attrlist = chainon (returned_attrs, *attrlist);
9371 attrlist = &returned_attrs;
9374 /* Handle parameter packs. */
9375 if (parameter_pack_p)
9377 if (decl_context == PARM)
9378 /* Turn the type into a pack expansion.*/
9379 type = make_pack_expansion (type);
9381 error ("non-parameter %qs cannot be a parameter pack", name);
9384 /* Did array size calculations overflow? */
9386 if (TREE_CODE (type) == ARRAY_TYPE
9387 && COMPLETE_TYPE_P (type)
9388 && TREE_CODE (TYPE_SIZE_UNIT (type)) == INTEGER_CST
9389 && TREE_OVERFLOW (TYPE_SIZE_UNIT (type)))
9391 error ("size of array %qs is too large", name);
9392 /* If we proceed with the array type as it is, we'll eventually
9393 crash in tree_low_cst(). */
9394 type = error_mark_node;
9397 if ((decl_context == FIELD || decl_context == PARM)
9398 && !processing_template_decl
9399 && variably_modified_type_p (type, NULL_TREE))
9401 if (decl_context == FIELD)
9402 error ("data member may not have variably modified type %qT", type);
9404 error ("parameter may not have variably modified type %qT", type);
9405 type = error_mark_node;
9408 if (explicitp == 1 || (explicitp && friendp))
9410 /* [dcl.fct.spec] The explicit specifier shall only be used in
9411 declarations of constructors within a class definition. */
9412 error ("only declarations of constructors can be %<explicit%>");
9416 if (storage_class == sc_mutable)
9418 if (decl_context != FIELD || friendp)
9420 error ("non-member %qs cannot be declared %<mutable%>", name);
9421 storage_class = sc_none;
9423 else if (decl_context == TYPENAME || declspecs->specs[(int)ds_typedef])
9425 error ("non-object member %qs cannot be declared %<mutable%>", name);
9426 storage_class = sc_none;
9428 else if (TREE_CODE (type) == FUNCTION_TYPE
9429 || TREE_CODE (type) == METHOD_TYPE)
9431 error ("function %qs cannot be declared %<mutable%>", name);
9432 storage_class = sc_none;
9436 error ("static %qs cannot be declared %<mutable%>", name);
9437 storage_class = sc_none;
9439 else if (type_quals & TYPE_QUAL_CONST)
9441 error ("const %qs cannot be declared %<mutable%>", name);
9442 storage_class = sc_none;
9444 else if (TREE_CODE (type) == REFERENCE_TYPE)
9446 permerror (input_location, "reference %qs cannot be declared "
9447 "%<mutable%>", name);
9448 storage_class = sc_none;
9452 /* If this is declaring a typedef name, return a TYPE_DECL. */
9453 if (declspecs->specs[(int)ds_typedef] && decl_context != TYPENAME)
9457 /* Note that the grammar rejects storage classes
9458 in typenames, fields or parameters. */
9459 if (current_lang_name == lang_name_java)
9460 TYPE_FOR_JAVA (type) = 1;
9462 /* This declaration:
9464 typedef void f(int) const;
9466 declares a function type which is not a member of any
9467 particular class, but which is cv-qualified; for
9468 example "f S::*" declares a pointer to a const-qualified
9469 member function of S. We record the cv-qualification in the
9471 if (memfn_quals && TREE_CODE (type) == FUNCTION_TYPE)
9473 type = apply_memfn_quals (type, memfn_quals);
9475 /* We have now dealt with these qualifiers. */
9476 memfn_quals = TYPE_UNQUALIFIED;
9479 if (decl_context == FIELD)
9480 decl = build_lang_decl (TYPE_DECL, unqualified_id, type);
9482 decl = build_decl (input_location, TYPE_DECL, unqualified_id, type);
9483 if (id_declarator && declarator->u.id.qualifying_scope) {
9484 error_at (DECL_SOURCE_LOCATION (decl),
9485 "typedef name may not be a nested-name-specifier");
9486 TREE_TYPE (decl) = error_mark_node;
9489 if (decl_context != FIELD)
9491 if (!current_function_decl)
9492 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
9493 else if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (current_function_decl)
9494 || (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P
9495 (current_function_decl)))
9496 /* The TYPE_DECL is "abstract" because there will be
9497 clones of this constructor/destructor, and there will
9498 be copies of this TYPE_DECL generated in those
9500 DECL_ABSTRACT (decl) = 1;
9502 else if (constructor_name_p (unqualified_id, current_class_type))
9503 permerror (input_location, "ISO C++ forbids nested type %qD with same name "
9504 "as enclosing class",
9507 /* If the user declares "typedef struct {...} foo" then the
9508 struct will have an anonymous name. Fill that name in now.
9509 Nothing can refer to it, so nothing needs know about the name
9511 if (type != error_mark_node
9514 && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
9515 && TYPE_ANONYMOUS_P (type)
9516 && cp_type_quals (type) == TYPE_UNQUALIFIED)
9520 /* Replace the anonymous name with the real name everywhere. */
9521 for (t = TYPE_MAIN_VARIANT (type); t; t = TYPE_NEXT_VARIANT (t))
9523 if (ANON_AGGRNAME_P (TYPE_IDENTIFIER (t)))
9524 /* We do not rename the debug info representing the
9525 anonymous tagged type because the standard says in
9526 [dcl.typedef] that the naming applies only for
9527 linkage purposes. */
9528 /*debug_hooks->set_name (t, decl);*/
9529 TYPE_NAME (t) = decl;
9532 if (TYPE_LANG_SPECIFIC (type))
9533 TYPE_WAS_ANONYMOUS (type) = 1;
9535 /* If this is a typedef within a template class, the nested
9536 type is a (non-primary) template. The name for the
9537 template needs updating as well. */
9538 if (TYPE_LANG_SPECIFIC (type) && CLASSTYPE_TEMPLATE_INFO (type))
9539 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type))
9540 = TYPE_IDENTIFIER (type);
9542 /* Adjust linkage now that we aren't anonymous anymore. */
9543 set_linkage_according_to_type (type, TYPE_MAIN_DECL (type));
9544 determine_visibility (TYPE_MAIN_DECL (type));
9546 /* FIXME remangle member functions; member functions of a
9547 type with external linkage have external linkage. */
9551 || (typedef_decl && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl)))
9552 C_TYPEDEF_EXPLICITLY_SIGNED (decl) = 1;
9554 bad_specifiers (decl, BSP_TYPE, virtualp,
9555 memfn_quals != TYPE_UNQUALIFIED,
9556 inlinep, friendp, raises != NULL_TREE);
9561 /* Detect the case of an array type of unspecified size
9562 which came, as such, direct from a typedef name.
9563 We must copy the type, so that the array's domain can be
9564 individually set by the object's initializer. */
9566 if (type && typedef_type
9567 && TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type)
9568 && TYPE_MAIN_VARIANT (type) == TYPE_MAIN_VARIANT (typedef_type))
9569 type = build_cplus_array_type (TREE_TYPE (type), NULL_TREE);
9571 /* Detect where we're using a typedef of function type to declare a
9572 function. PARMS will not be set, so we must create it now. */
9574 if (type == typedef_type && TREE_CODE (type) == FUNCTION_TYPE)
9576 tree decls = NULL_TREE;
9579 for (args = TYPE_ARG_TYPES (type);
9580 args && args != void_list_node;
9581 args = TREE_CHAIN (args))
9583 tree decl = cp_build_parm_decl (NULL_TREE, TREE_VALUE (args));
9585 DECL_CHAIN (decl) = decls;
9589 parms = nreverse (decls);
9591 if (decl_context != TYPENAME)
9593 /* A cv-qualifier-seq shall only be part of the function type
9594 for a non-static member function. [8.3.5/4 dcl.fct] */
9595 if (type_memfn_quals (type) != TYPE_UNQUALIFIED
9596 && (current_class_type == NULL_TREE || staticp) )
9599 ? G_("qualified function types cannot be used to "
9600 "declare static member functions")
9601 : G_("qualified function types cannot be used to "
9602 "declare free functions"));
9603 type = TYPE_MAIN_VARIANT (type);
9606 /* The qualifiers on the function type become the qualifiers on
9607 the non-static member function. */
9608 memfn_quals |= type_memfn_quals (type);
9609 type_quals = TYPE_UNQUALIFIED;
9613 /* If this is a type name (such as, in a cast or sizeof),
9614 compute the type and return it now. */
9616 if (decl_context == TYPENAME)
9618 /* Note that the grammar rejects storage classes
9619 in typenames, fields or parameters. */
9620 if (type_quals != TYPE_UNQUALIFIED)
9621 type_quals = TYPE_UNQUALIFIED;
9623 /* Special case: "friend class foo" looks like a TYPENAME context. */
9626 if (type_quals != TYPE_UNQUALIFIED)
9628 error ("type qualifiers specified for friend class declaration");
9629 type_quals = TYPE_UNQUALIFIED;
9633 error ("%<inline%> specified for friend class declaration");
9639 /* Don't allow friend declaration without a class-key. */
9640 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
9641 permerror (input_location, "template parameters cannot be friends");
9642 else if (TREE_CODE (type) == TYPENAME_TYPE)
9643 permerror (input_location, "friend declaration requires class-key, "
9644 "i.e. %<friend class %T::%D%>",
9645 TYPE_CONTEXT (type), TYPENAME_TYPE_FULLNAME (type));
9647 permerror (input_location, "friend declaration requires class-key, "
9648 "i.e. %<friend %#T%>",
9652 /* Only try to do this stuff if we didn't already give up. */
9653 if (type != integer_type_node)
9655 /* A friendly class? */
9656 if (current_class_type)
9657 make_friend_class (current_class_type, TYPE_MAIN_VARIANT (type),
9660 error ("trying to make class %qT a friend of global scope",
9663 type = void_type_node;
9666 else if (memfn_quals)
9668 if (ctype == NULL_TREE
9669 && TREE_CODE (type) == METHOD_TYPE)
9670 ctype = TYPE_METHOD_BASETYPE (type);
9673 type = build_memfn_type (type, ctype, memfn_quals);
9674 /* Core issue #547: need to allow this in template type args. */
9675 else if (template_type_arg && TREE_CODE (type) == FUNCTION_TYPE)
9676 type = apply_memfn_quals (type, memfn_quals);
9678 error ("invalid qualifiers on non-member function type");
9683 else if (unqualified_id == NULL_TREE && decl_context != PARM
9684 && decl_context != CATCHPARM
9685 && TREE_CODE (type) != UNION_TYPE
9688 error ("abstract declarator %qT used as declaration", type);
9689 return error_mark_node;
9692 /* Only functions may be declared using an operator-function-id. */
9694 && IDENTIFIER_OPNAME_P (unqualified_id)
9695 && TREE_CODE (type) != FUNCTION_TYPE
9696 && TREE_CODE (type) != METHOD_TYPE)
9698 error ("declaration of %qD as non-function", unqualified_id);
9699 return error_mark_node;
9702 /* We don't check parameter types here because we can emit a better
9703 error message later. */
9704 if (decl_context != PARM)
9706 type = check_var_type (unqualified_id, type);
9707 if (type == error_mark_node)
9708 return error_mark_node;
9711 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
9712 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
9714 if (decl_context == PARM || decl_context == CATCHPARM)
9716 if (ctype || in_namespace)
9717 error ("cannot use %<::%> in parameter declaration");
9719 /* A parameter declared as an array of T is really a pointer to T.
9720 One declared as a function is really a pointer to a function.
9721 One declared as a member is really a pointer to member. */
9723 if (TREE_CODE (type) == ARRAY_TYPE)
9725 /* Transfer const-ness of array into that of type pointed to. */
9726 type = build_pointer_type (TREE_TYPE (type));
9727 type_quals = TYPE_UNQUALIFIED;
9729 else if (TREE_CODE (type) == FUNCTION_TYPE)
9730 type = build_pointer_type (type);
9733 if (ctype && TREE_CODE (type) == FUNCTION_TYPE && staticp < 2
9734 && !NEW_DELETE_OPNAME_P (unqualified_id))
9735 type = build_memfn_type (type, ctype, memfn_quals);
9740 if (decl_context == PARM)
9742 decl = cp_build_parm_decl (unqualified_id, type);
9744 bad_specifiers (decl, BSP_PARM, virtualp,
9745 memfn_quals != TYPE_UNQUALIFIED,
9746 inlinep, friendp, raises != NULL_TREE);
9748 else if (decl_context == FIELD)
9750 /* The C99 flexible array extension. */
9751 if (!staticp && TREE_CODE (type) == ARRAY_TYPE
9752 && TYPE_DOMAIN (type) == NULL_TREE)
9754 tree itype = compute_array_index_type (dname, integer_zero_node,
9755 tf_warning_or_error);
9756 type = build_cplus_array_type (TREE_TYPE (type), itype);
9759 if (type == error_mark_node)
9761 /* Happens when declaring arrays of sizes which
9762 are error_mark_node, for example. */
9765 else if (in_namespace && !friendp)
9767 /* Something like struct S { int N::j; }; */
9768 error ("invalid use of %<::%>");
9769 return error_mark_node;
9771 else if (TREE_CODE (type) == FUNCTION_TYPE
9772 || TREE_CODE (type) == METHOD_TYPE)
9775 tree function_context;
9779 /* This should never happen in pure C++ (the check
9780 could be an assert). It could happen in
9781 Objective-C++ if someone writes invalid code that
9782 uses a function declaration for an instance
9783 variable or property (instance variables and
9784 properties are parsed as FIELD_DECLs, but they are
9785 part of an Objective-C class, not a C++ class).
9786 That code is invalid and is caught by this
9790 error ("declaration of function %qD in invalid context",
9792 return error_mark_node;
9795 /* ``A union may [ ... ] not [ have ] virtual functions.''
9797 if (virtualp && TREE_CODE (ctype) == UNION_TYPE)
9799 error ("function %qD declared virtual inside a union",
9801 return error_mark_node;
9804 if (NEW_DELETE_OPNAME_P (unqualified_id))
9808 error ("%qD cannot be declared virtual, since it "
9816 /* Check that the name used for a destructor makes sense. */
9817 if (sfk == sfk_destructor)
9819 tree uqname = id_declarator->u.id.unqualified_name;
9823 gcc_assert (friendp);
9824 error ("expected qualified name in friend declaration "
9825 "for destructor %qD", uqname);
9826 return error_mark_node;
9829 if (!check_dtor_name (ctype, TREE_OPERAND (uqname, 0)))
9831 error ("declaration of %qD as member of %qT",
9833 return error_mark_node;
9837 error ("a destructor cannot be %<constexpr%>");
9838 return error_mark_node;
9841 else if (sfk == sfk_constructor && friendp && !ctype)
9843 error ("expected qualified name in friend declaration "
9844 "for constructor %qD",
9845 id_declarator->u.id.unqualified_name);
9846 return error_mark_node;
9849 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
9850 function_context = (ctype != NULL_TREE) ?
9851 decl_function_context (TYPE_MAIN_DECL (ctype)) : NULL_TREE;
9852 publicp = (! friendp || ! staticp)
9853 && function_context == NULL_TREE;
9854 decl = grokfndecl (ctype, type,
9855 TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
9856 ? unqualified_id : dname,
9859 virtualp, flags, memfn_quals, raises,
9860 friendp ? -1 : 0, friendp, publicp,
9861 inlinep | (2 * constexpr_p),
9863 funcdef_flag, template_count, in_namespace,
9864 attrlist, declarator->id_loc);
9865 decl = set_virt_specifiers (decl, virt_specifiers);
9866 if (decl == NULL_TREE)
9867 return error_mark_node;
9869 /* This clobbers the attrs stored in `decl' from `attrlist'. */
9870 /* The decl and setting of decl_attr is also turned off. */
9871 decl = build_decl_attribute_variant (decl, decl_attr);
9874 /* [class.conv.ctor]
9876 A constructor declared without the function-specifier
9877 explicit that can be called with a single parameter
9878 specifies a conversion from the type of its first
9879 parameter to the type of its class. Such a constructor
9880 is called a converting constructor. */
9882 DECL_NONCONVERTING_P (decl) = 1;
9884 else if (!staticp && !dependent_type_p (type)
9885 && !COMPLETE_TYPE_P (complete_type (type))
9886 && (TREE_CODE (type) != ARRAY_TYPE || initialized == 0))
9889 error ("field %qD has incomplete type", unqualified_id);
9891 error ("name %qT has incomplete type", type);
9893 /* If we're instantiating a template, tell them which
9894 instantiation made the field's type be incomplete. */
9895 if (current_class_type
9896 && TYPE_NAME (current_class_type)
9897 && IDENTIFIER_TEMPLATE (TYPE_IDENTIFIER (current_class_type))
9899 && declspecs->type == type)
9900 error (" in instantiation of template %qT",
9901 current_class_type);
9903 return error_mark_node;
9909 error ("%qE is neither function nor member function; "
9910 "cannot be declared friend", unqualified_id);
9918 /* Friends are treated specially. */
9919 if (ctype == current_class_type)
9920 ; /* We already issued a permerror. */
9921 else if (decl && DECL_NAME (decl))
9923 if (template_class_depth (current_class_type) == 0)
9925 decl = check_explicit_specialization
9926 (unqualified_id, decl, template_count,
9927 2 * funcdef_flag + 4);
9928 if (decl == error_mark_node)
9929 return error_mark_node;
9932 decl = do_friend (ctype, unqualified_id, decl,
9938 return error_mark_node;
9941 /* Structure field. It may not be a function, except for C++. */
9943 if (decl == NULL_TREE)
9949 /* An attempt is being made to initialize a non-static
9950 member. But, from [class.mem]:
9952 4 A member-declarator can contain a
9953 constant-initializer only if it declares a static
9954 member (_class.static_) of integral or enumeration
9955 type, see _class.static.data_.
9957 This used to be relatively common practice, but
9958 the rest of the compiler does not correctly
9959 handle the initialization unless the member is
9960 static so we make it static below. */
9961 if (cxx_dialect >= cxx0x)
9963 sorry ("non-static data member initializers");
9967 permerror (input_location, "ISO C++ forbids initialization of member %qD",
9969 permerror (input_location, "making %qD static", unqualified_id);
9974 if (uses_template_parms (type))
9975 /* We'll check at instantiation time. */
9977 else if (constexpr_p)
9978 /* constexpr has the same requirements. */
9980 else if (check_static_variable_definition (unqualified_id,
9982 /* If we just return the declaration, crashes
9983 will sometimes occur. We therefore return
9984 void_type_node, as if this was a friend
9985 declaration, to cause callers to completely
9986 ignore this declaration. */
9987 return error_mark_node;
9992 /* C++ allows static class members. All other work
9993 for this is done by grokfield. */
9994 decl = build_lang_decl (VAR_DECL, unqualified_id, type);
9995 set_linkage_for_static_data_member (decl);
9996 /* Even if there is an in-class initialization, DECL
9997 is considered undefined until an out-of-class
9998 definition is provided. */
9999 DECL_EXTERNAL (decl) = 1;
10002 DECL_TLS_MODEL (decl) = decl_default_tls_model (decl);
10004 if (constexpr_p && !initialized)
10006 error ("constexpr static data member %qD must have an "
10007 "initializer", decl);
10008 constexpr_p = false;
10015 error ("non-static data member %qE declared %<constexpr%>",
10017 constexpr_p = false;
10019 decl = build_decl (input_location,
10020 FIELD_DECL, unqualified_id, type);
10021 DECL_NONADDRESSABLE_P (decl) = bitfield;
10022 if (bitfield && !unqualified_id)
10023 TREE_NO_WARNING (decl) = 1;
10025 if (storage_class == sc_mutable)
10027 DECL_MUTABLE_P (decl) = 1;
10028 storage_class = sc_none;
10032 bad_specifiers (decl, BSP_FIELD, virtualp,
10033 memfn_quals != TYPE_UNQUALIFIED,
10034 inlinep, friendp, raises != NULL_TREE);
10037 else if (TREE_CODE (type) == FUNCTION_TYPE
10038 || TREE_CODE (type) == METHOD_TYPE)
10040 tree original_name;
10043 if (!unqualified_id)
10044 return error_mark_node;
10046 if (TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR)
10047 original_name = dname;
10049 original_name = unqualified_id;
10051 if (storage_class == sc_auto)
10052 error ("storage class %<auto%> invalid for function %qs", name);
10053 else if (storage_class == sc_register)
10054 error ("storage class %<register%> invalid for function %qs", name);
10056 error ("storage class %<__thread%> invalid for function %qs", name);
10058 if (virt_specifiers)
10059 error ("virt-specifiers in %qs not allowed outside a class definition", name);
10060 /* Function declaration not at top level.
10061 Storage classes other than `extern' are not allowed
10062 and `extern' makes no difference. */
10063 if (! toplevel_bindings_p ()
10064 && (storage_class == sc_static
10065 || declspecs->specs[(int)ds_inline])
10068 if (storage_class == sc_static)
10069 pedwarn (input_location, OPT_pedantic,
10070 "%<static%> specified invalid for function %qs "
10071 "declared out of global scope", name);
10073 pedwarn (input_location, OPT_pedantic,
10074 "%<inline%> specifier invalid for function %qs "
10075 "declared out of global scope", name);
10078 if (ctype != NULL_TREE
10079 && TREE_CODE (ctype) != NAMESPACE_DECL && !MAYBE_CLASS_TYPE_P (ctype))
10081 error ("%q#T is not a class or a namespace", ctype);
10085 if (ctype == NULL_TREE)
10089 error ("virtual non-class function %qs", name);
10092 else if (sfk == sfk_constructor
10093 || sfk == sfk_destructor)
10095 error (funcdef_flag
10096 ? "%qs defined in a non-class scope"
10097 : "%qs declared in a non-class scope", name);
10102 /* Record presence of `static'. */
10103 publicp = (ctype != NULL_TREE
10104 || storage_class == sc_extern
10105 || storage_class != sc_static);
10107 decl = grokfndecl (ctype, type, original_name, parms, unqualified_id,
10108 virtualp, flags, memfn_quals, raises,
10110 publicp, inlinep | (2 * constexpr_p), sfk,
10112 template_count, in_namespace, attrlist,
10113 declarator->id_loc);
10114 if (decl == NULL_TREE)
10115 return error_mark_node;
10119 int invalid_static = 0;
10121 /* Don't allow a static member function in a class, and forbid
10122 declaring main to be static. */
10123 if (TREE_CODE (type) == METHOD_TYPE)
10125 permerror (input_location, "cannot declare member function %qD to have "
10126 "static linkage", decl);
10127 invalid_static = 1;
10129 else if (current_function_decl)
10131 /* FIXME need arm citation */
10132 error ("cannot declare static function inside another function");
10133 invalid_static = 1;
10136 if (invalid_static)
10139 storage_class = sc_none;
10145 /* It's a variable. */
10147 /* An uninitialized decl with `extern' is a reference. */
10148 decl = grokvardecl (type, unqualified_id,
10151 (type_quals & TYPE_QUAL_CONST) != 0,
10152 ctype ? ctype : in_namespace);
10153 bad_specifiers (decl, BSP_VAR, virtualp,
10154 memfn_quals != TYPE_UNQUALIFIED,
10155 inlinep, friendp, raises != NULL_TREE);
10159 DECL_CONTEXT (decl) = ctype;
10162 permerror (input_location, "%<static%> may not be used when defining "
10163 "(as opposed to declaring) a static data member");
10165 storage_class = sc_none;
10167 if (storage_class == sc_register && TREE_STATIC (decl))
10169 error ("static member %qD declared %<register%>", decl);
10170 storage_class = sc_none;
10172 if (storage_class == sc_extern && pedantic)
10174 pedwarn (input_location, OPT_pedantic,
10175 "cannot explicitly declare member %q#D to have "
10176 "extern linkage", decl);
10177 storage_class = sc_none;
10180 else if (constexpr_p && DECL_EXTERNAL (decl))
10182 error ("declaration of constexpr variable %qD is not a definition",
10184 constexpr_p = false;
10188 if (storage_class == sc_extern && initialized && !funcdef_flag)
10190 if (toplevel_bindings_p ())
10192 /* It's common practice (and completely valid) to have a const
10193 be initialized and declared extern. */
10194 if (!(type_quals & TYPE_QUAL_CONST))
10195 warning (0, "%qs initialized and declared %<extern%>", name);
10199 error ("%qs has both %<extern%> and initializer", name);
10200 return error_mark_node;
10204 /* Record `register' declaration for warnings on &
10205 and in case doing stupid register allocation. */
10207 if (storage_class == sc_register)
10208 DECL_REGISTER (decl) = 1;
10209 else if (storage_class == sc_extern)
10210 DECL_THIS_EXTERN (decl) = 1;
10211 else if (storage_class == sc_static)
10212 DECL_THIS_STATIC (decl) = 1;
10214 /* Set constexpr flag on vars (functions got it in grokfndecl). */
10215 if (constexpr_p && TREE_CODE (decl) == VAR_DECL)
10216 DECL_DECLARED_CONSTEXPR_P (decl) = true;
10218 /* Record constancy and volatility on the DECL itself . There's
10219 no need to do this when processing a template; we'll do this
10220 for the instantiated declaration based on the type of DECL. */
10221 if (!processing_template_decl)
10222 cp_apply_type_quals_to_decl (type_quals, decl);
10228 /* Subroutine of start_function. Ensure that each of the parameter
10229 types (as listed in PARMS) is complete, as is required for a
10230 function definition. */
10233 require_complete_types_for_parms (tree parms)
10235 for (; parms; parms = DECL_CHAIN (parms))
10237 if (dependent_type_p (TREE_TYPE (parms)))
10239 if (!VOID_TYPE_P (TREE_TYPE (parms))
10240 && complete_type_or_else (TREE_TYPE (parms), parms))
10242 relayout_decl (parms);
10243 DECL_ARG_TYPE (parms) = type_passed_as (TREE_TYPE (parms));
10246 /* grokparms or complete_type_or_else will have already issued
10248 TREE_TYPE (parms) = error_mark_node;
10252 /* Returns nonzero if T is a local variable. */
10255 local_variable_p (const_tree t)
10257 if ((TREE_CODE (t) == VAR_DECL
10258 /* A VAR_DECL with a context that is a _TYPE is a static data
10260 && !TYPE_P (CP_DECL_CONTEXT (t))
10261 /* Any other non-local variable must be at namespace scope. */
10262 && !DECL_NAMESPACE_SCOPE_P (t))
10263 || (TREE_CODE (t) == PARM_DECL))
10269 /* Like local_variable_p, but suitable for use as a tree-walking
10273 local_variable_p_walkfn (tree *tp, int *walk_subtrees,
10274 void *data ATTRIBUTE_UNUSED)
10276 if (local_variable_p (*tp) && !DECL_ARTIFICIAL (*tp))
10278 else if (TYPE_P (*tp))
10279 *walk_subtrees = 0;
10285 /* Check that ARG, which is a default-argument expression for a
10286 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
10287 something goes wrong. DECL may also be a _TYPE node, rather than a
10288 DECL, if there is no DECL available. */
10291 check_default_argument (tree decl, tree arg)
10296 if (TREE_CODE (arg) == DEFAULT_ARG)
10297 /* We get a DEFAULT_ARG when looking at an in-class declaration
10298 with a default argument. Ignore the argument for now; we'll
10299 deal with it after the class is complete. */
10308 decl_type = TREE_TYPE (decl);
10310 if (arg == error_mark_node
10311 || decl == error_mark_node
10312 || TREE_TYPE (arg) == error_mark_node
10313 || decl_type == error_mark_node)
10314 /* Something already went wrong. There's no need to check
10316 return error_mark_node;
10318 /* [dcl.fct.default]
10320 A default argument expression is implicitly converted to the
10322 if (!TREE_TYPE (arg)
10323 || !can_convert_arg (decl_type, TREE_TYPE (arg), arg, LOOKUP_NORMAL))
10326 error ("default argument for %q#D has type %qT",
10327 decl, TREE_TYPE (arg));
10329 error ("default argument for parameter of type %qT has type %qT",
10330 decl_type, TREE_TYPE (arg));
10332 return error_mark_node;
10335 /* [dcl.fct.default]
10337 Local variables shall not be used in default argument
10340 The keyword `this' shall not be used in a default argument of a
10341 member function. */
10342 var = cp_walk_tree_without_duplicates (&arg, local_variable_p_walkfn, NULL);
10345 error ("default argument %qE uses local variable %qD", arg, var);
10346 return error_mark_node;
10353 /* Returns a deprecated type used within TYPE, or NULL_TREE if none. */
10356 type_is_deprecated (tree type)
10358 enum tree_code code;
10359 if (TREE_DEPRECATED (type))
10361 if (TYPE_NAME (type)
10362 && TREE_DEPRECATED (TYPE_NAME (type)))
10365 /* Do warn about using typedefs to a deprecated class. */
10366 if (TAGGED_TYPE_P (type) && type != TYPE_MAIN_VARIANT (type))
10367 return type_is_deprecated (TYPE_MAIN_VARIANT (type));
10369 code = TREE_CODE (type);
10371 if (code == POINTER_TYPE || code == REFERENCE_TYPE
10372 || code == OFFSET_TYPE || code == FUNCTION_TYPE
10373 || code == METHOD_TYPE || code == ARRAY_TYPE)
10374 return type_is_deprecated (TREE_TYPE (type));
10376 if (TYPE_PTRMEMFUNC_P (type))
10377 return type_is_deprecated
10378 (TREE_TYPE (TREE_TYPE (TYPE_PTRMEMFUNC_FN_TYPE (type))));
10383 /* Decode the list of parameter types for a function type.
10384 Given the list of things declared inside the parens,
10385 return a list of types.
10387 If this parameter does not end with an ellipsis, we append
10390 *PARMS is set to the chain of PARM_DECLs created. */
10393 grokparms (tree parmlist, tree *parms)
10395 tree result = NULL_TREE;
10396 tree decls = NULL_TREE;
10400 for (parm = parmlist; parm != NULL_TREE; parm = TREE_CHAIN (parm))
10402 tree type = NULL_TREE;
10403 tree init = TREE_PURPOSE (parm);
10404 tree decl = TREE_VALUE (parm);
10405 const char *errmsg;
10407 if (parm == void_list_node)
10410 if (! decl || TREE_TYPE (decl) == error_mark_node)
10413 type = TREE_TYPE (decl);
10414 if (VOID_TYPE_P (type))
10416 if (same_type_p (type, void_type_node)
10417 && DECL_SELF_REFERENCE_P (type)
10418 && !DECL_NAME (decl) && !result && TREE_CHAIN (parm) == void_list_node)
10419 /* this is a parmlist of `(void)', which is ok. */
10421 cxx_incomplete_type_error (decl, type);
10422 /* It's not a good idea to actually create parameters of
10423 type `void'; other parts of the compiler assume that a
10424 void type terminates the parameter list. */
10425 type = error_mark_node;
10426 TREE_TYPE (decl) = error_mark_node;
10429 if (type != error_mark_node
10430 && TYPE_FOR_JAVA (type)
10431 && MAYBE_CLASS_TYPE_P (type))
10433 error ("parameter %qD has Java class type", decl);
10434 type = error_mark_node;
10435 TREE_TYPE (decl) = error_mark_node;
10439 if (type != error_mark_node
10440 && (errmsg = targetm.invalid_parameter_type (type)))
10443 type = error_mark_node;
10444 TREE_TYPE (decl) = error_mark_node;
10447 if (type != error_mark_node)
10449 if (deprecated_state != DEPRECATED_SUPPRESS)
10451 tree deptype = type_is_deprecated (type);
10453 warn_deprecated_use (deptype, NULL_TREE);
10456 /* Top-level qualifiers on the parameters are
10457 ignored for function types. */
10458 type = cp_build_qualified_type (type, 0);
10459 if (TREE_CODE (type) == METHOD_TYPE)
10461 error ("parameter %qD invalidly declared method type", decl);
10462 type = build_pointer_type (type);
10463 TREE_TYPE (decl) = type;
10465 else if (abstract_virtuals_error (decl, type))
10466 any_error = 1; /* Seems like a good idea. */
10467 else if (POINTER_TYPE_P (type))
10469 /* [dcl.fct]/6, parameter types cannot contain pointers
10470 (references) to arrays of unknown bound. */
10471 tree t = TREE_TYPE (type);
10472 int ptr = TYPE_PTR_P (type);
10476 if (TYPE_PTR_P (t))
10478 else if (TREE_CODE (t) != ARRAY_TYPE)
10480 else if (!TYPE_DOMAIN (t))
10484 if (TREE_CODE (t) == ARRAY_TYPE)
10486 ? G_("parameter %qD includes pointer to array of "
10487 "unknown bound %qT")
10488 : G_("parameter %qD includes reference to array of "
10489 "unknown bound %qT"),
10495 else if (init && !processing_template_decl)
10496 init = check_default_argument (decl, init);
10499 if (TREE_CODE (decl) == PARM_DECL
10500 && FUNCTION_PARAMETER_PACK_P (decl)
10501 && TREE_CHAIN (parm)
10502 && TREE_CHAIN (parm) != void_list_node)
10503 error ("parameter packs must be at the end of the parameter list");
10505 DECL_CHAIN (decl) = decls;
10507 result = tree_cons (init, type, result);
10509 decls = nreverse (decls);
10510 result = nreverse (result);
10512 result = chainon (result, void_list_node);
10519 /* D is a constructor or overloaded `operator='.
10521 Let T be the class in which D is declared. Then, this function
10524 -1 if D's is an ill-formed constructor or copy assignment operator
10525 whose first parameter is of type `T'.
10526 0 if D is not a copy constructor or copy assignment
10528 1 if D is a copy constructor or copy assignment operator whose
10529 first parameter is a reference to non-const qualified T.
10530 2 if D is a copy constructor or copy assignment operator whose
10531 first parameter is a reference to const qualified T.
10533 This function can be used as a predicate. Positive values indicate
10534 a copy constructor and nonzero values indicate a copy assignment
10538 copy_fn_p (const_tree d)
10544 gcc_assert (DECL_FUNCTION_MEMBER_P (d));
10546 if (TREE_CODE (d) == TEMPLATE_DECL
10547 || (DECL_TEMPLATE_INFO (d)
10548 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d))))
10549 /* Instantiations of template member functions are never copy
10550 functions. Note that member functions of templated classes are
10551 represented as template functions internally, and we must
10552 accept those as copy functions. */
10555 args = FUNCTION_FIRST_USER_PARMTYPE (d);
10559 arg_type = TREE_VALUE (args);
10560 if (arg_type == error_mark_node)
10563 if (TYPE_MAIN_VARIANT (arg_type) == DECL_CONTEXT (d))
10565 /* Pass by value copy assignment operator. */
10568 else if (TREE_CODE (arg_type) == REFERENCE_TYPE
10569 && !TYPE_REF_IS_RVALUE (arg_type)
10570 && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type)) == DECL_CONTEXT (d))
10572 if (CP_TYPE_CONST_P (TREE_TYPE (arg_type)))
10578 args = TREE_CHAIN (args);
10580 if (args && args != void_list_node && !TREE_PURPOSE (args))
10581 /* There are more non-optional args. */
10587 /* D is a constructor or overloaded `operator='.
10589 Let T be the class in which D is declared. Then, this function
10590 returns true when D is a move constructor or move assignment
10591 operator, false otherwise. */
10594 move_fn_p (const_tree d)
10598 bool result = false;
10600 gcc_assert (DECL_FUNCTION_MEMBER_P (d));
10602 if (cxx_dialect == cxx98)
10603 /* There are no move constructors if we are in C++98 mode. */
10606 if (TREE_CODE (d) == TEMPLATE_DECL
10607 || (DECL_TEMPLATE_INFO (d)
10608 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d))))
10609 /* Instantiations of template member functions are never copy
10610 functions. Note that member functions of templated classes are
10611 represented as template functions internally, and we must
10612 accept those as copy functions. */
10615 args = FUNCTION_FIRST_USER_PARMTYPE (d);
10619 arg_type = TREE_VALUE (args);
10620 if (arg_type == error_mark_node)
10623 if (TREE_CODE (arg_type) == REFERENCE_TYPE
10624 && TYPE_REF_IS_RVALUE (arg_type)
10625 && same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (arg_type)),
10629 args = TREE_CHAIN (args);
10631 if (args && args != void_list_node && !TREE_PURPOSE (args))
10632 /* There are more non-optional args. */
10638 /* Remember any special properties of member function DECL. */
10641 grok_special_member_properties (tree decl)
10645 if (!DECL_NONSTATIC_MEMBER_FUNCTION_P (decl))
10648 class_type = DECL_CONTEXT (decl);
10649 if (DECL_CONSTRUCTOR_P (decl))
10651 int ctor = copy_fn_p (decl);
10653 if (!DECL_ARTIFICIAL (decl))
10654 TYPE_HAS_USER_CONSTRUCTOR (class_type) = 1;
10660 A non-template constructor for class X is a copy
10661 constructor if its first parameter is of type X&, const
10662 X&, volatile X& or const volatile X&, and either there
10663 are no other parameters or else all other parameters have
10664 default arguments. */
10665 TYPE_HAS_COPY_CTOR (class_type) = 1;
10666 if (user_provided_p (decl))
10667 TYPE_HAS_COMPLEX_COPY_CTOR (class_type) = 1;
10669 TYPE_HAS_CONST_COPY_CTOR (class_type) = 1;
10671 else if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl)))
10673 TYPE_HAS_DEFAULT_CONSTRUCTOR (class_type) = 1;
10674 if (user_provided_p (decl))
10675 TYPE_HAS_COMPLEX_DFLT (class_type) = 1;
10677 else if (move_fn_p (decl) && user_provided_p (decl))
10678 TYPE_HAS_COMPLEX_MOVE_CTOR (class_type) = 1;
10679 else if (is_list_ctor (decl))
10680 TYPE_HAS_LIST_CTOR (class_type) = 1;
10682 if (DECL_DECLARED_CONSTEXPR_P (decl)
10683 && !copy_fn_p (decl) && !move_fn_p (decl))
10684 TYPE_HAS_CONSTEXPR_CTOR (class_type) = 1;
10686 else if (DECL_OVERLOADED_OPERATOR_P (decl) == NOP_EXPR)
10690 A non-template assignment operator for class X is a copy
10691 assignment operator if its parameter is of type X, X&, const
10692 X&, volatile X& or const volatile X&. */
10694 int assop = copy_fn_p (decl);
10698 TYPE_HAS_COPY_ASSIGN (class_type) = 1;
10699 if (user_provided_p (decl))
10700 TYPE_HAS_COMPLEX_COPY_ASSIGN (class_type) = 1;
10702 TYPE_HAS_CONST_COPY_ASSIGN (class_type) = 1;
10704 else if (move_fn_p (decl) && user_provided_p (decl))
10705 TYPE_HAS_COMPLEX_MOVE_ASSIGN (class_type) = 1;
10707 /* Destructors are handled in check_methods. */
10710 /* Check a constructor DECL has the correct form. Complains
10711 if the class has a constructor of the form X(X). */
10714 grok_ctor_properties (const_tree ctype, const_tree decl)
10716 int ctor_parm = copy_fn_p (decl);
10722 A declaration of a constructor for a class X is ill-formed if
10723 its first parameter is of type (optionally cv-qualified) X
10724 and either there are no other parameters or else all other
10725 parameters have default arguments.
10727 We *don't* complain about member template instantiations that
10728 have this form, though; they can occur as we try to decide
10729 what constructor to use during overload resolution. Since
10730 overload resolution will never prefer such a constructor to
10731 the non-template copy constructor (which is either explicitly
10732 or implicitly defined), there's no need to worry about their
10733 existence. Theoretically, they should never even be
10734 instantiated, but that's hard to forestall. */
10735 error ("invalid constructor; you probably meant %<%T (const %T&)%>",
10743 /* An operator with this code is unary, but can also be binary. */
10746 ambi_op_p (enum tree_code code)
10748 return (code == INDIRECT_REF
10749 || code == ADDR_EXPR
10750 || code == UNARY_PLUS_EXPR
10751 || code == NEGATE_EXPR
10752 || code == PREINCREMENT_EXPR
10753 || code == PREDECREMENT_EXPR);
10756 /* An operator with this name can only be unary. */
10759 unary_op_p (enum tree_code code)
10761 return (code == TRUTH_NOT_EXPR
10762 || code == BIT_NOT_EXPR
10763 || code == COMPONENT_REF
10764 || code == TYPE_EXPR);
10767 /* DECL is a declaration for an overloaded operator. If COMPLAIN is true,
10768 errors are issued for invalid declarations. */
10771 grok_op_properties (tree decl, bool complain)
10773 tree argtypes = TYPE_ARG_TYPES (TREE_TYPE (decl));
10775 int methodp = (TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE);
10776 tree name = DECL_NAME (decl);
10777 enum tree_code operator_code;
10782 /* Count the number of arguments and check for ellipsis. */
10783 for (argtype = argtypes, arity = 0;
10784 argtype && argtype != void_list_node;
10785 argtype = TREE_CHAIN (argtype))
10787 ellipsis_p = !argtype;
10789 class_type = DECL_CONTEXT (decl);
10790 if (class_type && !CLASS_TYPE_P (class_type))
10791 class_type = NULL_TREE;
10793 if (DECL_CONV_FN_P (decl))
10794 operator_code = TYPE_EXPR;
10798 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
10799 if (ansi_opname (CODE) == name) \
10801 operator_code = (CODE); \
10804 else if (ansi_assopname (CODE) == name) \
10806 operator_code = (CODE); \
10807 DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
10811 #include "operators.def"
10812 #undef DEF_OPERATOR
10814 gcc_unreachable ();
10817 gcc_assert (operator_code != MAX_TREE_CODES);
10818 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
10821 switch (operator_code)
10824 TYPE_HAS_NEW_OPERATOR (class_type) = 1;
10828 TYPE_GETS_DELETE (class_type) |= 1;
10832 TYPE_HAS_ARRAY_NEW_OPERATOR (class_type) = 1;
10835 case VEC_DELETE_EXPR:
10836 TYPE_GETS_DELETE (class_type) |= 2;
10843 /* [basic.std.dynamic.allocation]/1:
10845 A program is ill-formed if an allocation function is declared
10846 in a namespace scope other than global scope or declared static
10849 The same also holds true for deallocation functions. */
10850 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR
10851 || operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
10853 if (DECL_NAMESPACE_SCOPE_P (decl))
10855 if (CP_DECL_CONTEXT (decl) != global_namespace)
10857 error ("%qD may not be declared within a namespace", decl);
10860 else if (!TREE_PUBLIC (decl))
10862 error ("%qD may not be declared as static", decl);
10868 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR)
10870 TREE_TYPE (decl) = coerce_new_type (TREE_TYPE (decl));
10871 DECL_IS_OPERATOR_NEW (decl) = 1;
10873 else if (operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
10874 TREE_TYPE (decl) = coerce_delete_type (TREE_TYPE (decl));
10877 /* An operator function must either be a non-static member function
10878 or have at least one parameter of a class, a reference to a class,
10879 an enumeration, or a reference to an enumeration. 13.4.0.6 */
10880 if (! methodp || DECL_STATIC_FUNCTION_P (decl))
10882 if (operator_code == TYPE_EXPR
10883 || operator_code == CALL_EXPR
10884 || operator_code == COMPONENT_REF
10885 || operator_code == ARRAY_REF
10886 || operator_code == NOP_EXPR)
10888 error ("%qD must be a nonstatic member function", decl);
10895 if (DECL_STATIC_FUNCTION_P (decl))
10897 error ("%qD must be either a non-static member "
10898 "function or a non-member function", decl);
10902 for (p = argtypes; p && p != void_list_node; p = TREE_CHAIN (p))
10904 tree arg = non_reference (TREE_VALUE (p));
10905 if (arg == error_mark_node)
10908 /* MAYBE_CLASS_TYPE_P, rather than CLASS_TYPE_P, is used
10909 because these checks are performed even on
10910 template functions. */
10911 if (MAYBE_CLASS_TYPE_P (arg)
10912 || TREE_CODE (arg) == ENUMERAL_TYPE)
10916 if (!p || p == void_list_node)
10919 error ("%qD must have an argument of class or "
10920 "enumerated type", decl);
10926 /* There are no restrictions on the arguments to an overloaded
10928 if (operator_code == CALL_EXPR)
10931 /* Warn about conversion operators that will never be used. */
10932 if (IDENTIFIER_TYPENAME_P (name)
10933 && ! DECL_TEMPLATE_INFO (decl)
10935 /* Warn only declaring the function; there is no need to
10936 warn again about out-of-class definitions. */
10937 && class_type == current_class_type)
10939 tree t = TREE_TYPE (name);
10940 int ref = (TREE_CODE (t) == REFERENCE_TYPE);
10943 t = TYPE_MAIN_VARIANT (TREE_TYPE (t));
10945 if (TREE_CODE (t) == VOID_TYPE)
10946 warning (OPT_Wconversion,
10948 ? G_("conversion to a reference to void "
10949 "will never use a type conversion operator")
10950 : G_("conversion to void "
10951 "will never use a type conversion operator"));
10952 else if (class_type)
10954 if (t == class_type)
10955 warning (OPT_Wconversion,
10957 ? G_("conversion to a reference to the same type "
10958 "will never use a type conversion operator")
10959 : G_("conversion to the same type "
10960 "will never use a type conversion operator"));
10961 /* Don't force t to be complete here. */
10962 else if (MAYBE_CLASS_TYPE_P (t)
10963 && COMPLETE_TYPE_P (t)
10964 && DERIVED_FROM_P (t, class_type))
10965 warning (OPT_Wconversion,
10967 ? G_("conversion to a reference to a base class "
10968 "will never use a type conversion operator")
10969 : G_("conversion to a base class "
10970 "will never use a type conversion operator"));
10975 if (operator_code == COND_EXPR)
10978 error ("ISO C++ prohibits overloading operator ?:");
10981 else if (ellipsis_p)
10983 error ("%qD must not have variable number of arguments", decl);
10986 else if (ambi_op_p (operator_code))
10989 /* We pick the one-argument operator codes by default, so
10990 we don't have to change anything. */
10992 else if (arity == 2)
10994 /* If we thought this was a unary operator, we now know
10995 it to be a binary operator. */
10996 switch (operator_code)
10999 operator_code = MULT_EXPR;
11003 operator_code = BIT_AND_EXPR;
11006 case UNARY_PLUS_EXPR:
11007 operator_code = PLUS_EXPR;
11011 operator_code = MINUS_EXPR;
11014 case PREINCREMENT_EXPR:
11015 operator_code = POSTINCREMENT_EXPR;
11018 case PREDECREMENT_EXPR:
11019 operator_code = POSTDECREMENT_EXPR;
11023 gcc_unreachable ();
11026 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
11028 if ((operator_code == POSTINCREMENT_EXPR
11029 || operator_code == POSTDECREMENT_EXPR)
11030 && ! processing_template_decl
11031 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes)), integer_type_node))
11034 error ("postfix %qD must take %<int%> as its argument",
11037 error ("postfix %qD must take %<int%> as its second "
11045 error ("%qD must take either zero or one argument", decl);
11047 error ("%qD must take either one or two arguments", decl);
11051 /* More Effective C++ rule 6. */
11053 && (operator_code == POSTINCREMENT_EXPR
11054 || operator_code == POSTDECREMENT_EXPR
11055 || operator_code == PREINCREMENT_EXPR
11056 || operator_code == PREDECREMENT_EXPR))
11058 tree arg = TREE_VALUE (argtypes);
11059 tree ret = TREE_TYPE (TREE_TYPE (decl));
11060 if (methodp || TREE_CODE (arg) == REFERENCE_TYPE)
11061 arg = TREE_TYPE (arg);
11062 arg = TYPE_MAIN_VARIANT (arg);
11063 if (operator_code == PREINCREMENT_EXPR
11064 || operator_code == PREDECREMENT_EXPR)
11066 if (TREE_CODE (ret) != REFERENCE_TYPE
11067 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret)),
11069 warning (OPT_Weffc__, "prefix %qD should return %qT", decl,
11070 build_reference_type (arg));
11074 if (!same_type_p (TYPE_MAIN_VARIANT (ret), arg))
11075 warning (OPT_Weffc__, "postfix %qD should return %qT", decl, arg);
11079 else if (unary_op_p (operator_code))
11084 error ("%qD must take %<void%>", decl);
11086 error ("%qD must take exactly one argument", decl);
11090 else /* if (binary_op_p (operator_code)) */
11095 error ("%qD must take exactly one argument", decl);
11097 error ("%qD must take exactly two arguments", decl);
11101 /* More Effective C++ rule 7. */
11103 && (operator_code == TRUTH_ANDIF_EXPR
11104 || operator_code == TRUTH_ORIF_EXPR
11105 || operator_code == COMPOUND_EXPR))
11106 warning (OPT_Weffc__, "user-defined %qD always evaluates both arguments",
11110 /* Effective C++ rule 23. */
11113 && !DECL_ASSIGNMENT_OPERATOR_P (decl)
11114 && (operator_code == PLUS_EXPR
11115 || operator_code == MINUS_EXPR
11116 || operator_code == TRUNC_DIV_EXPR
11117 || operator_code == MULT_EXPR
11118 || operator_code == TRUNC_MOD_EXPR)
11119 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl))) == REFERENCE_TYPE)
11120 warning (OPT_Weffc__, "%qD should return by value", decl);
11122 /* [over.oper]/8 */
11123 for (; argtypes && argtypes != void_list_node;
11124 argtypes = TREE_CHAIN (argtypes))
11125 if (TREE_PURPOSE (argtypes))
11127 TREE_PURPOSE (argtypes) = NULL_TREE;
11128 if (operator_code == POSTINCREMENT_EXPR
11129 || operator_code == POSTDECREMENT_EXPR)
11131 pedwarn (input_location, OPT_pedantic, "%qD cannot have default arguments",
11136 error ("%qD cannot have default arguments", decl);
11144 /* Return a string giving the keyword associate with CODE. */
11146 static const char *
11147 tag_name (enum tag_types code)
11159 case typename_type:
11162 gcc_unreachable ();
11166 /* Name lookup in an elaborated-type-specifier (after the keyword
11167 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
11168 elaborated-type-specifier is invalid, issue a diagnostic and return
11169 error_mark_node; otherwise, return the *_TYPE to which it referred.
11170 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
11173 check_elaborated_type_specifier (enum tag_types tag_code,
11175 bool allow_template_p)
11181 struct S { struct S *p; };
11183 name lookup will find the TYPE_DECL for the implicit "S::S"
11184 typedef. Adjust for that here. */
11185 if (DECL_SELF_REFERENCE_P (decl))
11186 decl = TYPE_NAME (TREE_TYPE (decl));
11188 type = TREE_TYPE (decl);
11190 /* Check TEMPLATE_TYPE_PARM first because DECL_IMPLICIT_TYPEDEF_P
11191 is false for this case as well. */
11192 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
11194 error ("using template type parameter %qT after %qs",
11195 type, tag_name (tag_code));
11196 return error_mark_node;
11200 If the identifier resolves to a typedef-name or a template
11201 type-parameter, the elaborated-type-specifier is ill-formed.
11203 In other words, the only legitimate declaration to use in the
11204 elaborated type specifier is the implicit typedef created when
11205 the type is declared. */
11206 else if (!DECL_IMPLICIT_TYPEDEF_P (decl)
11207 && !DECL_SELF_REFERENCE_P (decl)
11208 && tag_code != typename_type)
11210 error ("using typedef-name %qD after %qs", decl, tag_name (tag_code));
11211 error ("%q+D has a previous declaration here", decl);
11212 return error_mark_node;
11214 else if (TREE_CODE (type) != RECORD_TYPE
11215 && TREE_CODE (type) != UNION_TYPE
11216 && tag_code != enum_type
11217 && tag_code != typename_type)
11219 error ("%qT referred to as %qs", type, tag_name (tag_code));
11220 error ("%q+T has a previous declaration here", type);
11221 return error_mark_node;
11223 else if (TREE_CODE (type) != ENUMERAL_TYPE
11224 && tag_code == enum_type)
11226 error ("%qT referred to as enum", type);
11227 error ("%q+T has a previous declaration here", type);
11228 return error_mark_node;
11230 else if (!allow_template_p
11231 && TREE_CODE (type) == RECORD_TYPE
11232 && CLASSTYPE_IS_TEMPLATE (type))
11234 /* If a class template appears as elaborated type specifier
11235 without a template header such as:
11237 template <class T> class C {};
11238 void f(class C); // No template header here
11240 then the required template argument is missing. */
11241 error ("template argument required for %<%s %T%>",
11242 tag_name (tag_code),
11243 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type)));
11244 return error_mark_node;
11250 /* Lookup NAME in elaborate type specifier in scope according to
11251 SCOPE and issue diagnostics if necessary.
11252 Return *_TYPE node upon success, NULL_TREE when the NAME is not
11253 found, and ERROR_MARK_NODE for type error. */
11256 lookup_and_check_tag (enum tag_types tag_code, tree name,
11257 tag_scope scope, bool template_header_p)
11261 if (scope == ts_global)
11263 /* First try ordinary name lookup, ignoring hidden class name
11264 injected via friend declaration. */
11265 decl = lookup_name_prefer_type (name, 2);
11266 /* If that fails, the name will be placed in the smallest
11267 non-class, non-function-prototype scope according to 3.3.1/5.
11268 We may already have a hidden name declared as friend in this
11269 scope. So lookup again but not ignoring hidden names.
11270 If we find one, that name will be made visible rather than
11271 creating a new tag. */
11273 decl = lookup_type_scope (name, ts_within_enclosing_non_class);
11276 decl = lookup_type_scope (name, scope);
11278 if (decl && DECL_CLASS_TEMPLATE_P (decl))
11279 decl = DECL_TEMPLATE_RESULT (decl);
11281 if (decl && TREE_CODE (decl) == TYPE_DECL)
11283 /* Look for invalid nested type:
11287 if (scope == ts_current && DECL_SELF_REFERENCE_P (decl))
11289 error ("%qD has the same name as the class in which it is "
11292 return error_mark_node;
11295 /* Two cases we need to consider when deciding if a class
11296 template is allowed as an elaborated type specifier:
11297 1. It is a self reference to its own class.
11298 2. It comes with a template header.
11302 template <class T> class C {
11303 class C *c1; // DECL_SELF_REFERENCE_P is true
11306 template <class U> class C; // template_header_p is true
11307 template <class T> class C<T>::D {
11308 class C *c2; // DECL_SELF_REFERENCE_P is true
11311 t = check_elaborated_type_specifier (tag_code,
11314 | DECL_SELF_REFERENCE_P (decl));
11317 else if (decl && TREE_CODE (decl) == TREE_LIST)
11319 error ("reference to %qD is ambiguous", name);
11320 print_candidates (decl);
11321 return error_mark_node;
11327 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
11328 Define the tag as a forward-reference if it is not defined.
11330 If a declaration is given, process it here, and report an error if
11331 multiple declarations are not identical.
11333 SCOPE is TS_CURRENT when this is also a definition. Only look in
11334 the current frame for the name (since C++ allows new names in any
11335 scope.) It is TS_WITHIN_ENCLOSING_NON_CLASS if this is a friend
11336 declaration. Only look beginning from the current scope outward up
11337 till the nearest non-class scope. Otherwise it is TS_GLOBAL.
11339 TEMPLATE_HEADER_P is true when this declaration is preceded by
11340 a set of template parameters. */
11343 xref_tag_1 (enum tag_types tag_code, tree name,
11344 tag_scope scope, bool template_header_p)
11346 enum tree_code code;
11348 tree context = NULL_TREE;
11350 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
11356 code = RECORD_TYPE;
11362 code = ENUMERAL_TYPE;
11365 gcc_unreachable ();
11368 /* In case of anonymous name, xref_tag is only called to
11369 make type node and push name. Name lookup is not required. */
11370 if (ANON_AGGRNAME_P (name))
11373 t = lookup_and_check_tag (tag_code, name,
11374 scope, template_header_p);
11376 if (t == error_mark_node)
11377 return error_mark_node;
11379 if (scope != ts_current && t && current_class_type
11380 && template_class_depth (current_class_type)
11381 && template_header_p)
11383 /* Since SCOPE is not TS_CURRENT, we are not looking at a
11384 definition of this tag. Since, in addition, we are currently
11385 processing a (member) template declaration of a template
11386 class, we must be very careful; consider:
11393 { template <class V>
11394 friend struct S1; };
11396 Here, the S2::S1 declaration should not be confused with the
11397 outer declaration. In particular, the inner version should
11398 have a template parameter of level 2, not level 1. This
11399 would be particularly important if the member declaration
11402 template <class V = U> friend struct S1;
11404 say, when we should tsubst into `U' when instantiating
11405 S2. On the other hand, when presented with:
11415 we must find the inner binding eventually. We
11416 accomplish this by making sure that the new type we
11417 create to represent this declaration has the right
11419 context = TYPE_CONTEXT (t);
11425 /* If no such tag is yet defined, create a forward-reference node
11426 and record it as the "definition".
11427 When a real declaration of this type is found,
11428 the forward-reference will be altered into a real type. */
11429 if (code == ENUMERAL_TYPE)
11431 error ("use of enum %q#D without previous declaration", name);
11432 return error_mark_node;
11436 t = make_class_type (code);
11437 TYPE_CONTEXT (t) = context;
11438 t = pushtag (name, t, scope);
11443 if (template_header_p && MAYBE_CLASS_TYPE_P (t))
11445 if (!redeclare_class_template (t, current_template_parms))
11446 return error_mark_node;
11448 else if (!processing_template_decl
11449 && CLASS_TYPE_P (t)
11450 && CLASSTYPE_IS_TEMPLATE (t))
11452 error ("redeclaration of %qT as a non-template", t);
11453 error ("previous declaration %q+D", t);
11454 return error_mark_node;
11457 /* Make injected friend class visible. */
11458 if (scope != ts_within_enclosing_non_class
11459 && hidden_name_p (TYPE_NAME (t)))
11461 DECL_ANTICIPATED (TYPE_NAME (t)) = 0;
11462 DECL_FRIEND_P (TYPE_NAME (t)) = 0;
11464 if (TYPE_TEMPLATE_INFO (t))
11466 DECL_ANTICIPATED (TYPE_TI_TEMPLATE (t)) = 0;
11467 DECL_FRIEND_P (TYPE_TI_TEMPLATE (t)) = 0;
11475 /* Wrapper for xref_tag_1. */
11478 xref_tag (enum tag_types tag_code, tree name,
11479 tag_scope scope, bool template_header_p)
11482 timevar_start (TV_NAME_LOOKUP);
11483 ret = xref_tag_1 (tag_code, name, scope, template_header_p);
11484 timevar_stop (TV_NAME_LOOKUP);
11490 xref_tag_from_type (tree old, tree id, tag_scope scope)
11492 enum tag_types tag_kind;
11494 if (TREE_CODE (old) == RECORD_TYPE)
11495 tag_kind = (CLASSTYPE_DECLARED_CLASS (old) ? class_type : record_type);
11497 tag_kind = union_type;
11499 if (id == NULL_TREE)
11500 id = TYPE_IDENTIFIER (old);
11502 return xref_tag (tag_kind, id, scope, false);
11505 /* Create the binfo hierarchy for REF with (possibly NULL) base list
11506 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
11507 access_* node, and the TREE_VALUE is the type of the base-class.
11508 Non-NULL TREE_TYPE indicates virtual inheritance.
11510 Returns true if the binfo hierarchy was successfully created,
11511 false if an error was detected. */
11514 xref_basetypes (tree ref, tree base_list)
11517 tree binfo, base_binfo;
11518 unsigned max_vbases = 0; /* Maximum direct & indirect virtual bases. */
11519 unsigned max_bases = 0; /* Maximum direct bases. */
11521 tree default_access;
11522 tree igo_prev; /* Track Inheritance Graph Order. */
11524 if (ref == error_mark_node)
11527 /* The base of a derived class is private by default, all others are
11529 default_access = (TREE_CODE (ref) == RECORD_TYPE
11530 && CLASSTYPE_DECLARED_CLASS (ref)
11531 ? access_private_node : access_public_node);
11533 /* First, make sure that any templates in base-classes are
11534 instantiated. This ensures that if we call ourselves recursively
11535 we do not get confused about which classes are marked and which
11537 basep = &base_list;
11540 tree basetype = TREE_VALUE (*basep);
11542 if (!(processing_template_decl && uses_template_parms (basetype))
11543 && !complete_type_or_else (basetype, NULL))
11544 /* An incomplete type. Remove it from the list. */
11545 *basep = TREE_CHAIN (*basep);
11549 if (TREE_TYPE (*basep))
11551 if (CLASS_TYPE_P (basetype))
11552 max_vbases += VEC_length (tree, CLASSTYPE_VBASECLASSES (basetype));
11553 basep = &TREE_CHAIN (*basep);
11557 TYPE_MARKED_P (ref) = 1;
11559 /* The binfo slot should be empty, unless this is an (ill-formed)
11561 if (TYPE_BINFO (ref) && !TYPE_SIZE (ref))
11563 error ("redefinition of %q#T", ref);
11567 gcc_assert (TYPE_MAIN_VARIANT (ref) == ref);
11569 binfo = make_tree_binfo (max_bases);
11571 TYPE_BINFO (ref) = binfo;
11572 BINFO_OFFSET (binfo) = size_zero_node;
11573 BINFO_TYPE (binfo) = ref;
11575 /* Apply base-class info set up to the variants of this type. */
11576 fixup_type_variants (ref);
11580 BINFO_BASE_ACCESSES (binfo) = VEC_alloc (tree, gc, max_bases);
11581 /* An aggregate cannot have baseclasses. */
11582 CLASSTYPE_NON_AGGREGATE (ref) = 1;
11584 if (TREE_CODE (ref) == UNION_TYPE)
11586 error ("derived union %qT invalid", ref);
11593 if (TYPE_FOR_JAVA (ref))
11595 error ("Java class %qT cannot have multiple bases", ref);
11602 CLASSTYPE_VBASECLASSES (ref) = VEC_alloc (tree, gc, max_vbases);
11604 if (TYPE_FOR_JAVA (ref))
11606 error ("Java class %qT cannot have virtual bases", ref);
11611 for (igo_prev = binfo; base_list; base_list = TREE_CHAIN (base_list))
11613 tree access = TREE_PURPOSE (base_list);
11614 int via_virtual = TREE_TYPE (base_list) != NULL_TREE;
11615 tree basetype = TREE_VALUE (base_list);
11617 if (access == access_default_node)
11618 access = default_access;
11620 if (PACK_EXPANSION_P (basetype))
11621 basetype = PACK_EXPANSION_PATTERN (basetype);
11622 if (TREE_CODE (basetype) == TYPE_DECL)
11623 basetype = TREE_TYPE (basetype);
11624 if (!MAYBE_CLASS_TYPE_P (basetype) || TREE_CODE (basetype) == UNION_TYPE)
11626 error ("base type %qT fails to be a struct or class type",
11631 if (TYPE_FOR_JAVA (basetype) && (current_lang_depth () == 0))
11632 TYPE_FOR_JAVA (ref) = 1;
11634 base_binfo = NULL_TREE;
11635 if (CLASS_TYPE_P (basetype) && !dependent_type_p (basetype))
11637 base_binfo = TYPE_BINFO (basetype);
11638 /* The original basetype could have been a typedef'd type. */
11639 basetype = BINFO_TYPE (base_binfo);
11641 /* Inherit flags from the base. */
11642 TYPE_HAS_NEW_OPERATOR (ref)
11643 |= TYPE_HAS_NEW_OPERATOR (basetype);
11644 TYPE_HAS_ARRAY_NEW_OPERATOR (ref)
11645 |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype);
11646 TYPE_GETS_DELETE (ref) |= TYPE_GETS_DELETE (basetype);
11647 TYPE_HAS_CONVERSION (ref) |= TYPE_HAS_CONVERSION (basetype);
11648 CLASSTYPE_DIAMOND_SHAPED_P (ref)
11649 |= CLASSTYPE_DIAMOND_SHAPED_P (basetype);
11650 CLASSTYPE_REPEATED_BASE_P (ref)
11651 |= CLASSTYPE_REPEATED_BASE_P (basetype);
11654 /* We must do this test after we've seen through a typedef
11656 if (TYPE_MARKED_P (basetype))
11658 if (basetype == ref)
11659 error ("recursive type %qT undefined", basetype);
11661 error ("duplicate base type %qT invalid", basetype);
11665 if (PACK_EXPANSION_P (TREE_VALUE (base_list)))
11666 /* Regenerate the pack expansion for the bases. */
11667 basetype = make_pack_expansion (basetype);
11669 TYPE_MARKED_P (basetype) = 1;
11671 base_binfo = copy_binfo (base_binfo, basetype, ref,
11672 &igo_prev, via_virtual);
11673 if (!BINFO_INHERITANCE_CHAIN (base_binfo))
11674 BINFO_INHERITANCE_CHAIN (base_binfo) = binfo;
11676 BINFO_BASE_APPEND (binfo, base_binfo);
11677 BINFO_BASE_ACCESS_APPEND (binfo, access);
11680 if (VEC_space (tree, CLASSTYPE_VBASECLASSES (ref), 1))
11681 /* If we have space in the vbase vector, we must have shared at
11682 least one of them, and are therefore diamond shaped. */
11683 CLASSTYPE_DIAMOND_SHAPED_P (ref) = 1;
11685 /* Unmark all the types. */
11686 for (i = 0; BINFO_BASE_ITERATE (binfo, i, base_binfo); i++)
11687 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
11688 TYPE_MARKED_P (ref) = 0;
11690 /* Now see if we have a repeated base type. */
11691 if (!CLASSTYPE_REPEATED_BASE_P (ref))
11693 for (base_binfo = binfo; base_binfo;
11694 base_binfo = TREE_CHAIN (base_binfo))
11696 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
11698 CLASSTYPE_REPEATED_BASE_P (ref) = 1;
11701 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 1;
11703 for (base_binfo = binfo; base_binfo;
11704 base_binfo = TREE_CHAIN (base_binfo))
11705 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
11706 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
11715 /* Copies the enum-related properties from type SRC to type DST.
11716 Used with the underlying type of an enum and the enum itself. */
11718 copy_type_enum (tree dst, tree src)
11720 TYPE_MIN_VALUE (dst) = TYPE_MIN_VALUE (src);
11721 TYPE_MAX_VALUE (dst) = TYPE_MAX_VALUE (src);
11722 TYPE_SIZE (dst) = TYPE_SIZE (src);
11723 TYPE_SIZE_UNIT (dst) = TYPE_SIZE_UNIT (src);
11724 SET_TYPE_MODE (dst, TYPE_MODE (src));
11725 TYPE_PRECISION (dst) = TYPE_PRECISION (src);
11726 TYPE_ALIGN (dst) = TYPE_ALIGN (src);
11727 TYPE_USER_ALIGN (dst) = TYPE_USER_ALIGN (src);
11728 TYPE_UNSIGNED (dst) = TYPE_UNSIGNED (src);
11731 /* Begin compiling the definition of an enumeration type.
11734 if ENUMTYPE is not NULL_TREE then the type has alredy been found.
11736 UNDERLYING_TYPE is the type that will be used as the storage for
11737 the enumeration type. This should be NULL_TREE if no storage type
11740 SCOPED_ENUM_P is true if this is a scoped enumeration type.
11742 if IS_NEW is not NULL, gets TRUE iff a new type is created.
11744 Returns the type object, as yet incomplete.
11745 Also records info about it so that build_enumerator
11746 may be used to declare the individual values as they are read. */
11749 start_enum (tree name, tree enumtype, tree underlying_type,
11750 bool scoped_enum_p, bool *is_new)
11752 tree prevtype = NULL_TREE;
11753 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
11757 /* [C++0x dcl.enum]p5:
11759 If not explicitly specified, the underlying type of a scoped
11760 enumeration type is int. */
11761 if (!underlying_type && scoped_enum_p)
11762 underlying_type = integer_type_node;
11764 if (underlying_type)
11765 underlying_type = cv_unqualified (underlying_type);
11767 /* If this is the real definition for a previous forward reference,
11768 fill in the contents in the same object that used to be the
11769 forward reference. */
11771 enumtype = lookup_and_check_tag (enum_type, name,
11772 /*tag_scope=*/ts_current,
11773 /*template_header_p=*/false);
11775 /* In case of a template_decl, the only check that should be deferred
11776 to instantiation time is the comparison of underlying types. */
11777 if (enumtype && TREE_CODE (enumtype) == ENUMERAL_TYPE)
11779 if (scoped_enum_p != SCOPED_ENUM_P (enumtype))
11781 error_at (input_location, "scoped/unscoped mismatch "
11782 "in enum %q#T", enumtype);
11783 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype)),
11784 "previous definition here");
11785 enumtype = error_mark_node;
11787 else if (ENUM_FIXED_UNDERLYING_TYPE_P (enumtype) != !! underlying_type)
11789 error_at (input_location, "underlying type mismatch "
11790 "in enum %q#T", enumtype);
11791 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype)),
11792 "previous definition here");
11793 enumtype = error_mark_node;
11795 else if (underlying_type && ENUM_UNDERLYING_TYPE (enumtype)
11796 && !dependent_type_p (underlying_type)
11797 && !dependent_type_p (ENUM_UNDERLYING_TYPE (enumtype))
11798 && !same_type_p (underlying_type,
11799 ENUM_UNDERLYING_TYPE (enumtype)))
11801 error_at (input_location, "different underlying type "
11802 "in enum %q#T", enumtype);
11803 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype)),
11804 "previous definition here");
11805 underlying_type = NULL_TREE;
11809 if (!enumtype || TREE_CODE (enumtype) != ENUMERAL_TYPE
11810 || processing_template_decl)
11812 /* In case of error, make a dummy enum to allow parsing to
11814 if (enumtype == error_mark_node)
11816 name = make_anon_name ();
11817 enumtype = NULL_TREE;
11820 /* enumtype may be an ENUMERAL_TYPE if this is a redefinition
11821 of an opaque enum, or an opaque enum of an already defined
11822 enumeration (C++0x only).
11823 In any other case, it'll be NULL_TREE. */
11829 prevtype = enumtype;
11830 enumtype = cxx_make_type (ENUMERAL_TYPE);
11831 enumtype = pushtag (name, enumtype, /*tag_scope=*/ts_current);
11832 if (enumtype == error_mark_node)
11833 return error_mark_node;
11835 /* The enum is considered opaque until the opening '{' of the
11836 enumerator list. */
11837 SET_OPAQUE_ENUM_P (enumtype, true);
11838 ENUM_FIXED_UNDERLYING_TYPE_P (enumtype) = !! underlying_type;
11841 SET_SCOPED_ENUM_P (enumtype, scoped_enum_p);
11843 if (underlying_type)
11845 if (CP_INTEGRAL_TYPE_P (underlying_type))
11847 copy_type_enum (enumtype, underlying_type);
11848 ENUM_UNDERLYING_TYPE (enumtype) = underlying_type;
11850 else if (dependent_type_p (underlying_type))
11851 ENUM_UNDERLYING_TYPE (enumtype) = underlying_type;
11853 error ("underlying type %<%T%> of %<%T%> must be an integral type",
11854 underlying_type, enumtype);
11857 /* If into a template class, the returned enum is always the first
11858 declaration (opaque or not) seen. This way all the references to
11859 this type will be to the same declaration. The following ones are used
11860 only to check for definition errors. */
11861 if (prevtype && processing_template_decl)
11867 /* After processing and defining all the values of an enumeration type,
11868 install their decls in the enumeration type.
11869 ENUMTYPE is the type object. */
11872 finish_enum_value_list (tree enumtype)
11875 tree underlying_type;
11878 tree minnode, maxnode;
11881 bool fixed_underlying_type_p
11882 = ENUM_UNDERLYING_TYPE (enumtype) != NULL_TREE;
11884 /* We built up the VALUES in reverse order. */
11885 TYPE_VALUES (enumtype) = nreverse (TYPE_VALUES (enumtype));
11887 /* For an enum defined in a template, just set the type of the values;
11888 all further processing is postponed until the template is
11889 instantiated. We need to set the type so that tsubst of a CONST_DECL
11891 if (processing_template_decl)
11893 for (values = TYPE_VALUES (enumtype);
11895 values = TREE_CHAIN (values))
11896 TREE_TYPE (TREE_VALUE (values)) = enumtype;
11900 /* Determine the minimum and maximum values of the enumerators. */
11901 if (TYPE_VALUES (enumtype))
11903 minnode = maxnode = NULL_TREE;
11905 for (values = TYPE_VALUES (enumtype);
11907 values = TREE_CHAIN (values))
11909 decl = TREE_VALUE (values);
11911 /* [dcl.enum]: Following the closing brace of an enum-specifier,
11912 each enumerator has the type of its enumeration. Prior to the
11913 closing brace, the type of each enumerator is the type of its
11914 initializing value. */
11915 TREE_TYPE (decl) = enumtype;
11917 /* Update the minimum and maximum values, if appropriate. */
11918 value = DECL_INITIAL (decl);
11919 if (value == error_mark_node)
11920 value = integer_zero_node;
11921 /* Figure out what the minimum and maximum values of the
11922 enumerators are. */
11924 minnode = maxnode = value;
11925 else if (tree_int_cst_lt (maxnode, value))
11927 else if (tree_int_cst_lt (value, minnode))
11934 If the enumerator-list is empty, the underlying type is as if
11935 the enumeration had a single enumerator with value 0. */
11936 minnode = maxnode = integer_zero_node;
11938 if (!fixed_underlying_type_p)
11940 /* Compute the number of bits require to represent all values of the
11941 enumeration. We must do this before the type of MINNODE and
11942 MAXNODE are transformed, since tree_int_cst_min_precision relies
11943 on the TREE_TYPE of the value it is passed. */
11944 bool unsignedp = tree_int_cst_sgn (minnode) >= 0;
11945 int lowprec = tree_int_cst_min_precision (minnode, unsignedp);
11946 int highprec = tree_int_cst_min_precision (maxnode, unsignedp);
11947 int precision = MAX (lowprec, highprec);
11949 bool use_short_enum;
11951 /* Determine the underlying type of the enumeration.
11955 The underlying type of an enumeration is an integral type that
11956 can represent all the enumerator values defined in the
11957 enumeration. It is implementation-defined which integral type is
11958 used as the underlying type for an enumeration except that the
11959 underlying type shall not be larger than int unless the value of
11960 an enumerator cannot fit in an int or unsigned int.
11962 We use "int" or an "unsigned int" as the underlying type, even if
11963 a smaller integral type would work, unless the user has
11964 explicitly requested that we use the smallest possible type. The
11965 user can request that for all enumerations with a command line
11966 flag, or for just one enumeration with an attribute. */
11968 use_short_enum = flag_short_enums
11969 || lookup_attribute ("packed", TYPE_ATTRIBUTES (enumtype));
11971 for (itk = (use_short_enum ? itk_char : itk_int);
11975 underlying_type = integer_types[itk];
11976 if (underlying_type != NULL_TREE
11977 && TYPE_PRECISION (underlying_type) >= precision
11978 && TYPE_UNSIGNED (underlying_type) == unsignedp)
11981 if (itk == itk_none)
11985 IF no integral type can represent all the enumerator values, the
11986 enumeration is ill-formed. */
11987 error ("no integral type can represent all of the enumerator values "
11988 "for %qT", enumtype);
11989 precision = TYPE_PRECISION (long_long_integer_type_node);
11990 underlying_type = integer_types[itk_unsigned_long_long];
11995 The value of sizeof() applied to an enumeration type, an object
11996 of an enumeration type, or an enumerator, is the value of sizeof()
11997 applied to the underlying type. */
11998 copy_type_enum (enumtype, underlying_type);
12000 /* Compute the minimum and maximum values for the type.
12004 For an enumeration where emin is the smallest enumerator and emax
12005 is the largest, the values of the enumeration are the values of the
12006 underlying type in the range bmin to bmax, where bmin and bmax are,
12007 respectively, the smallest and largest values of the smallest bit-
12008 field that can store emin and emax. */
12010 /* The middle-end currently assumes that types with TYPE_PRECISION
12011 narrower than their underlying type are suitably zero or sign
12012 extended to fill their mode. Similarly, it assumes that the front
12013 end assures that a value of a particular type must be within
12014 TYPE_MIN_VALUE and TYPE_MAX_VALUE.
12016 We used to set these fields based on bmin and bmax, but that led
12017 to invalid assumptions like optimizing away bounds checking. So
12018 now we just set the TYPE_PRECISION, TYPE_MIN_VALUE, and
12019 TYPE_MAX_VALUE to the values for the mode above and only restrict
12020 the ENUM_UNDERLYING_TYPE for the benefit of diagnostics. */
12021 ENUM_UNDERLYING_TYPE (enumtype)
12022 = build_distinct_type_copy (underlying_type);
12023 TYPE_PRECISION (ENUM_UNDERLYING_TYPE (enumtype)) = precision;
12024 set_min_and_max_values_for_integral_type
12025 (ENUM_UNDERLYING_TYPE (enumtype), precision, unsignedp);
12027 /* If -fstrict-enums, still constrain TYPE_MIN/MAX_VALUE. */
12028 if (flag_strict_enums)
12029 set_min_and_max_values_for_integral_type (enumtype, precision,
12033 underlying_type = ENUM_UNDERLYING_TYPE (enumtype);
12035 /* Convert each of the enumerators to the type of the underlying
12036 type of the enumeration. */
12037 for (values = TYPE_VALUES (enumtype); values; values = TREE_CHAIN (values))
12039 location_t saved_location;
12041 decl = TREE_VALUE (values);
12042 saved_location = input_location;
12043 input_location = DECL_SOURCE_LOCATION (decl);
12044 if (fixed_underlying_type_p)
12045 /* If the enumeration type has a fixed underlying type, we
12046 already checked all of the enumerator values. */
12047 value = DECL_INITIAL (decl);
12049 value = perform_implicit_conversion (underlying_type,
12050 DECL_INITIAL (decl),
12051 tf_warning_or_error);
12052 input_location = saved_location;
12054 /* Do not clobber shared ints. */
12055 value = copy_node (value);
12057 TREE_TYPE (value) = enumtype;
12058 DECL_INITIAL (decl) = value;
12061 /* Fix up all variant types of this enum type. */
12062 for (t = TYPE_MAIN_VARIANT (enumtype); t; t = TYPE_NEXT_VARIANT (t))
12063 TYPE_VALUES (t) = TYPE_VALUES (enumtype);
12065 /* Finish debugging output for this type. */
12066 rest_of_type_compilation (enumtype, namespace_bindings_p ());
12069 /* Finishes the enum type. This is called only the first time an
12070 enumeration is seen, be it opaque or odinary.
12071 ENUMTYPE is the type object. */
12074 finish_enum (tree enumtype)
12076 if (processing_template_decl)
12078 if (at_function_scope_p ())
12079 add_stmt (build_min (TAG_DEFN, enumtype));
12083 /* Here there should not be any variants of this type. */
12084 gcc_assert (enumtype == TYPE_MAIN_VARIANT (enumtype)
12085 && !TYPE_NEXT_VARIANT (enumtype));
12088 /* Build and install a CONST_DECL for an enumeration constant of the
12089 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
12090 LOC is the location of NAME.
12091 Assignment of sequential values by default is handled here. */
12094 build_enumerator (tree name, tree value, tree enumtype, location_t loc)
12100 /* If the VALUE was erroneous, pretend it wasn't there; that will
12101 result in the enum being assigned the next value in sequence. */
12102 if (value == error_mark_node)
12105 /* Remove no-op casts from the value. */
12107 STRIP_TYPE_NOPS (value);
12109 if (! processing_template_decl)
12111 /* Validate and default VALUE. */
12112 if (value != NULL_TREE)
12114 value = cxx_constant_value (value);
12116 if (TREE_CODE (value) == INTEGER_CST
12117 && INTEGRAL_OR_ENUMERATION_TYPE_P (TREE_TYPE (value)))
12119 value = perform_integral_promotions (value);
12123 error ("enumerator value for %qD is not an integer constant", name);
12128 /* Default based on previous value. */
12129 if (value == NULL_TREE)
12131 if (TYPE_VALUES (enumtype))
12134 unsigned HOST_WIDE_INT lo;
12138 /* The next value is the previous value plus one.
12139 add_double doesn't know the type of the target expression,
12140 so we must check with int_fits_type_p as well. */
12141 prev_value = DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype)));
12142 if (error_operand_p (prev_value))
12143 value = error_mark_node;
12146 overflowed = add_double (TREE_INT_CST_LOW (prev_value),
12147 TREE_INT_CST_HIGH (prev_value),
12149 value = build_int_cst_wide (TREE_TYPE (prev_value), lo, hi);
12151 |= !int_fits_type_p (value, TREE_TYPE (prev_value));
12155 error ("overflow in enumeration values at %qD", name);
12156 value = error_mark_node;
12161 value = integer_zero_node;
12164 /* Remove no-op casts from the value. */
12165 STRIP_TYPE_NOPS (value);
12167 /* If the underlying type of the enum is fixed, check whether
12168 the enumerator values fits in the underlying type. If it
12169 does not fit, the program is ill-formed [C++0x dcl.enum]. */
12170 if (ENUM_UNDERLYING_TYPE (enumtype)
12172 && TREE_CODE (value) == INTEGER_CST
12173 && !int_fits_type_p (value, ENUM_UNDERLYING_TYPE (enumtype)))
12175 error ("enumerator value %E is too large for underlying type %<%T%>",
12176 value, ENUM_UNDERLYING_TYPE (enumtype));
12178 /* Silently convert the value so that we can continue. */
12179 value = perform_implicit_conversion (ENUM_UNDERLYING_TYPE (enumtype),
12184 /* C++ associates enums with global, function, or class declarations. */
12185 context = current_scope ();
12187 /* Build the actual enumeration constant. Note that the enumeration
12188 constants have the underlying type of the enum (if it is fixed)
12189 or the type of their initializer (if the underlying type of the
12190 enum is not fixed):
12194 If the underlying type is fixed, the type of each enumerator
12195 prior to the closing brace is the underlying type; if the
12196 initializing value of an enumerator cannot be represented by
12197 the underlying type, the program is ill-formed. If the
12198 underlying type is not fixed, the type of each enumerator is
12199 the type of its initializing value.
12201 If the underlying type is not fixed, it will be computed by
12202 finish_enum and we will reset the type of this enumerator. Of
12203 course, if we're processing a template, there may be no value. */
12204 type = value ? TREE_TYPE (value) : NULL_TREE;
12206 if (context && context == current_class_type)
12207 /* This enum declaration is local to the class. We need the full
12208 lang_decl so that we can record DECL_CLASS_CONTEXT, for example. */
12209 decl = build_lang_decl_loc (loc, CONST_DECL, name, type);
12211 /* It's a global enum, or it's local to a function. (Note local to
12212 a function could mean local to a class method. */
12213 decl = build_decl (loc, CONST_DECL, name, type);
12215 DECL_CONTEXT (decl) = FROB_CONTEXT (context);
12216 TREE_CONSTANT (decl) = 1;
12217 TREE_READONLY (decl) = 1;
12218 DECL_INITIAL (decl) = value;
12220 if (context && context == current_class_type && !SCOPED_ENUM_P (enumtype))
12221 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
12222 on the TYPE_FIELDS list for `S'. (That's so that you can say
12223 things like `S::i' later.) */
12224 finish_member_declaration (decl);
12228 /* Add this enumeration constant to the list for this type. */
12229 TYPE_VALUES (enumtype) = tree_cons (name, decl, TYPE_VALUES (enumtype));
12232 /* Look for an enumerator with the given NAME within the enumeration
12233 type ENUMTYPE. This routine is used primarily for qualified name
12234 lookup into an enumerator in C++0x, e.g.,
12236 enum class Color { Red, Green, Blue };
12238 Color color = Color::Red;
12240 Returns the value corresponding to the enumerator, or
12241 NULL_TREE if no such enumerator was found. */
12243 lookup_enumerator (tree enumtype, tree name)
12246 gcc_assert (enumtype && TREE_CODE (enumtype) == ENUMERAL_TYPE);
12248 e = purpose_member (name, TYPE_VALUES (enumtype));
12249 return e? TREE_VALUE (e) : NULL_TREE;
12253 /* We're defining DECL. Make sure that its type is OK. */
12256 check_function_type (tree decl, tree current_function_parms)
12258 tree fntype = TREE_TYPE (decl);
12259 tree return_type = complete_type (TREE_TYPE (fntype));
12261 /* In a function definition, arg types must be complete. */
12262 require_complete_types_for_parms (current_function_parms);
12264 if (dependent_type_p (return_type))
12266 if (!COMPLETE_OR_VOID_TYPE_P (return_type)
12267 || (TYPE_FOR_JAVA (return_type) && MAYBE_CLASS_TYPE_P (return_type)))
12269 tree args = TYPE_ARG_TYPES (fntype);
12271 if (!COMPLETE_OR_VOID_TYPE_P (return_type))
12272 error ("return type %q#T is incomplete", return_type);
12274 error ("return type has Java class type %q#T", return_type);
12276 /* Make it return void instead. */
12277 if (TREE_CODE (fntype) == METHOD_TYPE)
12278 fntype = build_method_type_directly (TREE_TYPE (TREE_VALUE (args)),
12280 TREE_CHAIN (args));
12282 fntype = build_function_type (void_type_node, args);
12284 = build_exception_variant (fntype,
12285 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (decl)));
12286 fntype = (cp_build_type_attribute_variant
12287 (fntype, TYPE_ATTRIBUTES (TREE_TYPE (decl))));
12288 TREE_TYPE (decl) = fntype;
12291 abstract_virtuals_error (decl, TREE_TYPE (fntype));
12294 /* Create the FUNCTION_DECL for a function definition.
12295 DECLSPECS and DECLARATOR are the parts of the declaration;
12296 they describe the function's name and the type it returns,
12297 but twisted together in a fashion that parallels the syntax of C.
12299 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
12300 DECLARATOR is really the DECL for the function we are about to
12301 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
12302 indicating that the function is an inline defined in-class.
12304 This function creates a binding context for the function body
12305 as well as setting up the FUNCTION_DECL in current_function_decl.
12307 For C++, we must first check whether that datum makes any sense.
12308 For example, "class A local_a(1,2);" means that variable local_a
12309 is an aggregate of type A, which should have a constructor
12310 applied to it with the argument list [1, 2].
12312 On entry, DECL_INITIAL (decl1) should be NULL_TREE or error_mark_node,
12313 or may be a BLOCK if the function has been defined previously
12314 in this translation unit. On exit, DECL_INITIAL (decl1) will be
12315 error_mark_node if the function has never been defined, or
12316 a BLOCK if the function has been defined somewhere. */
12319 start_preparsed_function (tree decl1, tree attrs, int flags)
12321 tree ctype = NULL_TREE;
12324 int doing_friend = 0;
12325 struct cp_binding_level *bl;
12326 tree current_function_parms;
12327 struct c_fileinfo *finfo
12328 = get_fileinfo (LOCATION_FILE (DECL_SOURCE_LOCATION (decl1)));
12329 bool honor_interface;
12331 /* Sanity check. */
12332 gcc_assert (TREE_CODE (TREE_VALUE (void_list_node)) == VOID_TYPE);
12333 gcc_assert (TREE_CHAIN (void_list_node) == NULL_TREE);
12335 fntype = TREE_TYPE (decl1);
12336 if (TREE_CODE (fntype) == METHOD_TYPE)
12337 ctype = TYPE_METHOD_BASETYPE (fntype);
12339 /* ISO C++ 11.4/5. A friend function defined in a class is in
12340 the (lexical) scope of the class in which it is defined. */
12341 if (!ctype && DECL_FRIEND_P (decl1))
12343 ctype = DECL_FRIEND_CONTEXT (decl1);
12345 /* CTYPE could be null here if we're dealing with a template;
12346 for example, `inline friend float foo()' inside a template
12347 will have no CTYPE set. */
12348 if (ctype && TREE_CODE (ctype) != RECORD_TYPE)
12354 if (DECL_DECLARED_INLINE_P (decl1)
12355 && lookup_attribute ("noinline", attrs))
12356 warning (0, "inline function %q+D given attribute noinline", decl1);
12358 /* Handle gnu_inline attribute. */
12359 if (GNU_INLINE_P (decl1))
12361 DECL_EXTERNAL (decl1) = 1;
12362 DECL_NOT_REALLY_EXTERN (decl1) = 0;
12363 DECL_INTERFACE_KNOWN (decl1) = 1;
12364 DECL_DISREGARD_INLINE_LIMITS (decl1) = 1;
12367 if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1))
12368 /* This is a constructor, we must ensure that any default args
12369 introduced by this definition are propagated to the clones
12370 now. The clones are used directly in overload resolution. */
12371 adjust_clone_args (decl1);
12373 /* Sometimes we don't notice that a function is a static member, and
12374 build a METHOD_TYPE for it. Fix that up now. */
12375 if (ctype != NULL_TREE && DECL_STATIC_FUNCTION_P (decl1)
12376 && TREE_CODE (TREE_TYPE (decl1)) == METHOD_TYPE)
12378 revert_static_member_fn (decl1);
12382 /* Set up current_class_type, and enter the scope of the class, if
12385 push_nested_class (ctype);
12386 else if (DECL_STATIC_FUNCTION_P (decl1))
12387 push_nested_class (DECL_CONTEXT (decl1));
12389 /* Now that we have entered the scope of the class, we must restore
12390 the bindings for any template parameters surrounding DECL1, if it
12391 is an inline member template. (Order is important; consider the
12392 case where a template parameter has the same name as a field of
12393 the class.) It is not until after this point that
12394 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
12395 if (flags & SF_INCLASS_INLINE)
12396 maybe_begin_member_template_processing (decl1);
12398 /* Effective C++ rule 15. */
12400 && DECL_OVERLOADED_OPERATOR_P (decl1) == NOP_EXPR
12401 && TREE_CODE (TREE_TYPE (fntype)) == VOID_TYPE)
12402 warning (OPT_Weffc__, "%<operator=%> should return a reference to %<*this%>");
12404 /* Make the init_value nonzero so pushdecl knows this is not tentative.
12405 error_mark_node is replaced below (in poplevel) with the BLOCK. */
12406 if (!DECL_INITIAL (decl1))
12407 DECL_INITIAL (decl1) = error_mark_node;
12409 /* This function exists in static storage.
12410 (This does not mean `static' in the C sense!) */
12411 TREE_STATIC (decl1) = 1;
12413 /* We must call push_template_decl after current_class_type is set
12414 up. (If we are processing inline definitions after exiting a
12415 class scope, current_class_type will be NULL_TREE until set above
12416 by push_nested_class.) */
12417 if (processing_template_decl)
12419 /* FIXME: Handle error_mark_node more gracefully. */
12420 tree newdecl1 = push_template_decl (decl1);
12421 if (newdecl1 != error_mark_node)
12425 /* We are now in the scope of the function being defined. */
12426 current_function_decl = decl1;
12428 /* Save the parm names or decls from this function's declarator
12429 where store_parm_decls will find them. */
12430 current_function_parms = DECL_ARGUMENTS (decl1);
12432 /* Make sure the parameter and return types are reasonable. When
12433 you declare a function, these types can be incomplete, but they
12434 must be complete when you define the function. */
12435 check_function_type (decl1, current_function_parms);
12437 /* Build the return declaration for the function. */
12438 restype = TREE_TYPE (fntype);
12439 if (DECL_RESULT (decl1) == NULL_TREE)
12443 resdecl = build_decl (input_location, RESULT_DECL, 0, restype);
12444 DECL_ARTIFICIAL (resdecl) = 1;
12445 DECL_IGNORED_P (resdecl) = 1;
12446 DECL_RESULT (decl1) = resdecl;
12448 cp_apply_type_quals_to_decl (cp_type_quals (restype), resdecl);
12451 /* Let the user know we're compiling this function. */
12452 announce_function (decl1);
12454 /* Record the decl so that the function name is defined.
12455 If we already have a decl for this name, and it is a FUNCTION_DECL,
12456 use the old decl. */
12457 if (!processing_template_decl && !(flags & SF_PRE_PARSED))
12459 /* A specialization is not used to guide overload resolution. */
12460 if (!DECL_FUNCTION_MEMBER_P (decl1)
12461 && !(DECL_USE_TEMPLATE (decl1) &&
12462 PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl1))))
12464 tree olddecl = pushdecl (decl1);
12466 if (olddecl == error_mark_node)
12467 /* If something went wrong when registering the declaration,
12468 use DECL1; we have to have a FUNCTION_DECL to use when
12469 parsing the body of the function. */
12473 /* Otherwise, OLDDECL is either a previous declaration
12474 of the same function or DECL1 itself. */
12476 if (warn_missing_declarations
12477 && olddecl == decl1
12478 && !DECL_MAIN_P (decl1)
12479 && TREE_PUBLIC (decl1)
12480 && !DECL_DECLARED_INLINE_P (decl1))
12484 /* Check whether DECL1 is in an anonymous
12486 for (context = DECL_CONTEXT (decl1);
12488 context = DECL_CONTEXT (context))
12490 if (TREE_CODE (context) == NAMESPACE_DECL
12491 && DECL_NAME (context) == NULL_TREE)
12495 if (context == NULL)
12496 warning (OPT_Wmissing_declarations,
12497 "no previous declaration for %q+D", decl1);
12505 /* We need to set the DECL_CONTEXT. */
12506 if (!DECL_CONTEXT (decl1) && DECL_TEMPLATE_INFO (decl1))
12507 DECL_CONTEXT (decl1) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1));
12509 fntype = TREE_TYPE (decl1);
12511 /* If #pragma weak applies, mark the decl appropriately now.
12512 The pragma only applies to global functions. Because
12513 determining whether or not the #pragma applies involves
12514 computing the mangled name for the declaration, we cannot
12515 apply the pragma until after we have merged this declaration
12516 with any previous declarations; if the original declaration
12517 has a linkage specification, that specification applies to
12518 the definition as well, and may affect the mangled name. */
12519 if (DECL_FILE_SCOPE_P (decl1))
12520 maybe_apply_pragma_weak (decl1);
12523 /* constexpr functions must have literal argument types and
12524 literal return type. */
12525 validate_constexpr_fundecl (decl1);
12527 /* Reset this in case the call to pushdecl changed it. */
12528 current_function_decl = decl1;
12530 gcc_assert (DECL_INITIAL (decl1));
12532 /* This function may already have been parsed, in which case just
12533 return; our caller will skip over the body without parsing. */
12534 if (DECL_INITIAL (decl1) != error_mark_node)
12537 /* Initialize RTL machinery. We cannot do this until
12538 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
12539 even when processing a template; this is how we get
12540 CFUN set up, and our per-function variables initialized.
12541 FIXME factor out the non-RTL stuff. */
12542 bl = current_binding_level;
12543 allocate_struct_function (decl1, processing_template_decl);
12545 /* Initialize the language data structures. Whenever we start
12546 a new function, we destroy temporaries in the usual way. */
12547 cfun->language = ggc_alloc_cleared_language_function ();
12548 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
12549 current_binding_level = bl;
12551 /* Start the statement-tree, start the tree now. */
12552 DECL_SAVED_TREE (decl1) = push_stmt_list ();
12554 /* If we are (erroneously) defining a function that we have already
12555 defined before, wipe out what we knew before. */
12556 if (!DECL_PENDING_INLINE_P (decl1))
12557 DECL_SAVED_FUNCTION_DATA (decl1) = NULL;
12559 if (ctype && !doing_friend && !DECL_STATIC_FUNCTION_P (decl1))
12561 /* We know that this was set up by `grokclassfn'. We do not
12562 wait until `store_parm_decls', since evil parse errors may
12563 never get us to that point. Here we keep the consistency
12564 between `current_class_type' and `current_class_ptr'. */
12565 tree t = DECL_ARGUMENTS (decl1);
12567 gcc_assert (t != NULL_TREE && TREE_CODE (t) == PARM_DECL);
12568 gcc_assert (TREE_CODE (TREE_TYPE (t)) == POINTER_TYPE);
12570 cp_function_chain->x_current_class_ref
12571 = cp_build_indirect_ref (t, RO_NULL, tf_warning_or_error);
12572 cp_function_chain->x_current_class_ptr = t;
12574 /* Constructors and destructors need to know whether they're "in
12575 charge" of initializing virtual base classes. */
12576 t = DECL_CHAIN (t);
12577 if (DECL_HAS_IN_CHARGE_PARM_P (decl1))
12579 current_in_charge_parm = t;
12580 t = DECL_CHAIN (t);
12582 if (DECL_HAS_VTT_PARM_P (decl1))
12584 gcc_assert (DECL_NAME (t) == vtt_parm_identifier);
12585 current_vtt_parm = t;
12589 honor_interface = (!DECL_TEMPLATE_INSTANTIATION (decl1)
12590 /* Implicitly-defined methods (like the
12591 destructor for a class in which no destructor
12592 is explicitly declared) must not be defined
12593 until their definition is needed. So, we
12594 ignore interface specifications for
12595 compiler-generated functions. */
12596 && !DECL_ARTIFICIAL (decl1));
12598 if (DECL_INTERFACE_KNOWN (decl1))
12600 tree ctx = decl_function_context (decl1);
12602 if (DECL_NOT_REALLY_EXTERN (decl1))
12603 DECL_EXTERNAL (decl1) = 0;
12605 if (ctx != NULL_TREE && DECL_DECLARED_INLINE_P (ctx)
12606 && TREE_PUBLIC (ctx))
12607 /* This is a function in a local class in an extern inline
12609 comdat_linkage (decl1);
12611 /* If this function belongs to an interface, it is public.
12612 If it belongs to someone else's interface, it is also external.
12613 This only affects inlines and template instantiations. */
12614 else if (!finfo->interface_unknown && honor_interface)
12616 if (DECL_DECLARED_INLINE_P (decl1)
12617 || DECL_TEMPLATE_INSTANTIATION (decl1)
12618 || processing_template_decl)
12620 DECL_EXTERNAL (decl1)
12621 = (finfo->interface_only
12622 || (DECL_DECLARED_INLINE_P (decl1)
12623 && ! flag_implement_inlines
12624 && !DECL_VINDEX (decl1)));
12626 /* For WIN32 we also want to put these in linkonce sections. */
12627 maybe_make_one_only (decl1);
12630 DECL_EXTERNAL (decl1) = 0;
12631 DECL_INTERFACE_KNOWN (decl1) = 1;
12632 /* If this function is in an interface implemented in this file,
12633 make sure that the back end knows to emit this function
12635 if (!DECL_EXTERNAL (decl1))
12636 mark_needed (decl1);
12638 else if (finfo->interface_unknown && finfo->interface_only
12639 && honor_interface)
12641 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
12642 interface, we will have both finfo->interface_unknown and
12643 finfo->interface_only set. In that case, we don't want to
12644 use the normal heuristics because someone will supply a
12645 #pragma implementation elsewhere, and deducing it here would
12646 produce a conflict. */
12647 comdat_linkage (decl1);
12648 DECL_EXTERNAL (decl1) = 0;
12649 DECL_INTERFACE_KNOWN (decl1) = 1;
12650 DECL_DEFER_OUTPUT (decl1) = 1;
12654 /* This is a definition, not a reference.
12655 So clear DECL_EXTERNAL, unless this is a GNU extern inline. */
12656 if (!GNU_INLINE_P (decl1))
12657 DECL_EXTERNAL (decl1) = 0;
12659 if ((DECL_DECLARED_INLINE_P (decl1)
12660 || DECL_TEMPLATE_INSTANTIATION (decl1))
12661 && ! DECL_INTERFACE_KNOWN (decl1))
12662 DECL_DEFER_OUTPUT (decl1) = 1;
12664 DECL_INTERFACE_KNOWN (decl1) = 1;
12667 /* Determine the ELF visibility attribute for the function. We must not
12668 do this before calling "pushdecl", as we must allow "duplicate_decls"
12669 to merge any attributes appropriately. We also need to wait until
12671 if (!DECL_CLONED_FUNCTION_P (decl1))
12672 determine_visibility (decl1);
12674 begin_scope (sk_function_parms, decl1);
12678 if (DECL_DESTRUCTOR_P (decl1)
12679 || (DECL_CONSTRUCTOR_P (decl1)
12680 && targetm.cxx.cdtor_returns_this ()))
12682 cdtor_label = build_decl (input_location,
12683 LABEL_DECL, NULL_TREE, NULL_TREE);
12684 DECL_CONTEXT (cdtor_label) = current_function_decl;
12687 start_fname_decls ();
12689 store_parm_decls (current_function_parms);
12693 /* Like start_preparsed_function, except that instead of a
12694 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
12696 Returns 1 on success. If the DECLARATOR is not suitable for a function
12697 (it defines a datum instead), we return 0, which tells
12698 yyparse to report a parse error. */
12701 start_function (cp_decl_specifier_seq *declspecs,
12702 const cp_declarator *declarator,
12707 decl1 = grokdeclarator (declarator, declspecs, FUNCDEF, 1, &attrs);
12708 if (decl1 == error_mark_node)
12710 /* If the declarator is not suitable for a function definition,
12711 cause a syntax error. */
12712 if (decl1 == NULL_TREE || TREE_CODE (decl1) != FUNCTION_DECL)
12714 error ("invalid function declaration");
12718 if (DECL_MAIN_P (decl1))
12719 /* main must return int. grokfndecl should have corrected it
12720 (and issued a diagnostic) if the user got it wrong. */
12721 gcc_assert (same_type_p (TREE_TYPE (TREE_TYPE (decl1)),
12722 integer_type_node));
12724 start_preparsed_function (decl1, attrs, /*flags=*/SF_DEFAULT);
12729 /* Returns true iff an EH_SPEC_BLOCK should be created in the body of
12733 use_eh_spec_block (tree fn)
12735 return (flag_exceptions && flag_enforce_eh_specs
12736 && !processing_template_decl
12737 && !type_throw_all_p (TREE_TYPE (fn))
12738 /* We insert the EH_SPEC_BLOCK only in the original
12739 function; then, it is copied automatically to the
12741 && !DECL_CLONED_FUNCTION_P (fn)
12742 /* Implicitly-generated constructors and destructors have
12743 exception specifications. However, those specifications
12744 are the union of the possible exceptions specified by the
12745 constructors/destructors for bases and members, so no
12746 unallowed exception will ever reach this function. By
12747 not creating the EH_SPEC_BLOCK we save a little memory,
12748 and we avoid spurious warnings about unreachable
12750 && !DECL_ARTIFICIAL (fn));
12753 /* Store the parameter declarations into the current function declaration.
12754 This is called after parsing the parameter declarations, before
12755 digesting the body of the function.
12757 Also install to binding contour return value identifier, if any. */
12760 store_parm_decls (tree current_function_parms)
12762 tree fndecl = current_function_decl;
12765 /* This is a chain of any other decls that came in among the parm
12766 declarations. If a parm is declared with enum {foo, bar} x;
12767 then CONST_DECLs for foo and bar are put here. */
12768 tree nonparms = NULL_TREE;
12770 if (current_function_parms)
12772 /* This case is when the function was defined with an ANSI prototype.
12773 The parms already have decls, so we need not do anything here
12774 except record them as in effect
12775 and complain if any redundant old-style parm decls were written. */
12777 tree specparms = current_function_parms;
12780 /* Must clear this because it might contain TYPE_DECLs declared
12782 current_binding_level->names = NULL;
12784 /* If we're doing semantic analysis, then we'll call pushdecl
12785 for each of these. We must do them in reverse order so that
12786 they end in the correct forward order. */
12787 specparms = nreverse (specparms);
12789 for (parm = specparms; parm; parm = next)
12791 next = DECL_CHAIN (parm);
12792 if (TREE_CODE (parm) == PARM_DECL)
12794 if (DECL_NAME (parm) == NULL_TREE
12795 || TREE_CODE (parm) != VOID_TYPE)
12798 error ("parameter %qD declared void", parm);
12802 /* If we find an enum constant or a type tag,
12803 put it aside for the moment. */
12804 TREE_CHAIN (parm) = NULL_TREE;
12805 nonparms = chainon (nonparms, parm);
12809 /* Get the decls in their original chain order and record in the
12810 function. This is all and only the PARM_DECLs that were
12811 pushed into scope by the loop above. */
12812 DECL_ARGUMENTS (fndecl) = getdecls ();
12815 DECL_ARGUMENTS (fndecl) = NULL_TREE;
12817 /* Now store the final chain of decls for the arguments
12818 as the decl-chain of the current lexical scope.
12819 Put the enumerators in as well, at the front so that
12820 DECL_ARGUMENTS is not modified. */
12821 current_binding_level->names = chainon (nonparms, DECL_ARGUMENTS (fndecl));
12823 if (use_eh_spec_block (current_function_decl))
12824 current_eh_spec_block = begin_eh_spec_block ();
12828 /* We have finished doing semantic analysis on DECL, but have not yet
12829 generated RTL for its body. Save away our current state, so that
12830 when we want to generate RTL later we know what to do. */
12833 save_function_data (tree decl)
12835 struct language_function *f;
12837 /* Save the language-specific per-function data so that we can
12838 get it back when we really expand this function. */
12839 gcc_assert (!DECL_PENDING_INLINE_P (decl));
12842 f = ggc_alloc_language_function ();
12843 memcpy (f, cp_function_chain, sizeof (struct language_function));
12844 DECL_SAVED_FUNCTION_DATA (decl) = f;
12846 /* Clear out the bits we don't need. */
12847 f->base.x_stmt_tree.x_cur_stmt_list = NULL_TREE;
12848 f->bindings = NULL;
12849 f->x_local_names = NULL;
12853 /* Set the return value of the constructor (if present). */
12856 finish_constructor_body (void)
12861 if (targetm.cxx.cdtor_returns_this ()
12862 && (! TYPE_FOR_JAVA (current_class_type)))
12864 /* Any return from a constructor will end up here. */
12865 add_stmt (build_stmt (input_location, LABEL_EXPR, cdtor_label));
12867 val = DECL_ARGUMENTS (current_function_decl);
12868 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
12869 DECL_RESULT (current_function_decl), val);
12870 /* Return the address of the object. */
12871 exprstmt = build_stmt (input_location, RETURN_EXPR, val);
12872 add_stmt (exprstmt);
12876 /* Do all the processing for the beginning of a destructor; set up the
12877 vtable pointers and cleanups for bases and members. */
12880 begin_destructor_body (void)
12882 tree compound_stmt;
12884 /* If the CURRENT_CLASS_TYPE is incomplete, we will have already
12885 issued an error message. We still want to try to process the
12886 body of the function, but initialize_vtbl_ptrs will crash if
12887 TYPE_BINFO is NULL. */
12888 if (COMPLETE_TYPE_P (current_class_type))
12890 compound_stmt = begin_compound_stmt (0);
12891 /* Make all virtual function table pointers in non-virtual base
12892 classes point to CURRENT_CLASS_TYPE's virtual function
12894 initialize_vtbl_ptrs (current_class_ptr);
12895 finish_compound_stmt (compound_stmt);
12897 /* And insert cleanups for our bases and members so that they
12898 will be properly destroyed if we throw. */
12899 push_base_cleanups ();
12903 /* At the end of every destructor we generate code to delete the object if
12904 necessary. Do that now. */
12907 finish_destructor_body (void)
12911 /* Any return from a destructor will end up here; that way all base
12912 and member cleanups will be run when the function returns. */
12913 add_stmt (build_stmt (input_location, LABEL_EXPR, cdtor_label));
12915 /* In a virtual destructor, we must call delete. */
12916 if (DECL_VIRTUAL_P (current_function_decl))
12919 tree virtual_size = cxx_sizeof (current_class_type);
12923 At the point of definition of a virtual destructor (including
12924 an implicit definition), non-placement operator delete shall
12925 be looked up in the scope of the destructor's class and if
12926 found shall be accessible and unambiguous. */
12927 exprstmt = build_op_delete_call(DELETE_EXPR, current_class_ptr,
12929 /*global_p=*/false,
12930 /*placement=*/NULL_TREE,
12931 /*alloc_fn=*/NULL_TREE);
12933 if_stmt = begin_if_stmt ();
12934 finish_if_stmt_cond (build2 (BIT_AND_EXPR, integer_type_node,
12935 current_in_charge_parm,
12938 finish_expr_stmt (exprstmt);
12939 finish_then_clause (if_stmt);
12940 finish_if_stmt (if_stmt);
12943 if (targetm.cxx.cdtor_returns_this ())
12947 val = DECL_ARGUMENTS (current_function_decl);
12948 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
12949 DECL_RESULT (current_function_decl), val);
12950 /* Return the address of the object. */
12951 exprstmt = build_stmt (input_location, RETURN_EXPR, val);
12952 add_stmt (exprstmt);
12956 /* Do the necessary processing for the beginning of a function body, which
12957 in this case includes member-initializers, but not the catch clauses of
12958 a function-try-block. Currently, this means opening a binding level
12959 for the member-initializers (in a ctor) and member cleanups (in a dtor). */
12962 begin_function_body (void)
12966 if (! FUNCTION_NEEDS_BODY_BLOCK (current_function_decl))
12969 if (processing_template_decl)
12970 /* Do nothing now. */;
12972 /* Always keep the BLOCK node associated with the outermost pair of
12973 curly braces of a function. These are needed for correct
12974 operation of dwarfout.c. */
12975 keep_next_level (true);
12977 stmt = begin_compound_stmt (BCS_FN_BODY);
12979 if (processing_template_decl)
12980 /* Do nothing now. */;
12981 else if (DECL_DESTRUCTOR_P (current_function_decl))
12982 begin_destructor_body ();
12987 /* Do the processing for the end of a function body. Currently, this means
12988 closing out the cleanups for fully-constructed bases and members, and in
12989 the case of the destructor, deleting the object if desired. Again, this
12990 is only meaningful for [cd]tors, since they are the only functions where
12991 there is a significant distinction between the main body and any
12992 function catch clauses. Handling, say, main() return semantics here
12993 would be wrong, as flowing off the end of a function catch clause for
12994 main() would also need to return 0. */
12997 finish_function_body (tree compstmt)
12999 if (compstmt == NULL_TREE)
13002 /* Close the block. */
13003 finish_compound_stmt (compstmt);
13005 if (processing_template_decl)
13006 /* Do nothing now. */;
13007 else if (DECL_CONSTRUCTOR_P (current_function_decl))
13008 finish_constructor_body ();
13009 else if (DECL_DESTRUCTOR_P (current_function_decl))
13010 finish_destructor_body ();
13013 /* Given a function, returns the BLOCK corresponding to the outermost level
13014 of curly braces, skipping the artificial block created for constructor
13018 outer_curly_brace_block (tree fndecl)
13020 tree block = BLOCK_SUBBLOCKS (DECL_INITIAL (fndecl));
13021 if (FUNCTION_NEEDS_BODY_BLOCK (current_function_decl))
13022 /* Skip the artificial function body block. */
13023 block = BLOCK_SUBBLOCKS (block);
13027 /* If FNDECL is a class's key method, add the class to the list of
13028 keyed classes that should be emitted. */
13031 record_key_method_defined (tree fndecl)
13033 if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fndecl)
13034 && DECL_VIRTUAL_P (fndecl)
13035 && !processing_template_decl)
13037 tree fnclass = DECL_CONTEXT (fndecl);
13038 if (fndecl == CLASSTYPE_KEY_METHOD (fnclass))
13039 keyed_classes = tree_cons (NULL_TREE, fnclass, keyed_classes);
13043 /* Subroutine of finish_function.
13044 Save the body of constexpr functions for possible
13045 future compile time evaluation. */
13048 maybe_save_function_definition (tree fun)
13050 if (!processing_template_decl
13051 && DECL_DECLARED_CONSTEXPR_P (fun)
13052 && !DECL_CLONED_FUNCTION_P (fun))
13053 register_constexpr_fundef (fun, DECL_SAVED_TREE (fun));
13056 /* Finish up a function declaration and compile that function
13057 all the way to assembler language output. The free the storage
13058 for the function definition.
13060 FLAGS is a bitwise or of the following values:
13062 We just finished processing the body of an in-class inline
13063 function definition. (This processing will have taken place
13064 after the class definition is complete.) */
13067 finish_function (int flags)
13069 tree fndecl = current_function_decl;
13070 tree fntype, ctype = NULL_TREE;
13071 int inclass_inline = (flags & 2) != 0;
13073 /* When we get some parse errors, we can end up without a
13074 current_function_decl, so cope. */
13075 if (fndecl == NULL_TREE)
13076 return error_mark_node;
13078 if (c_dialect_objc ())
13079 objc_finish_function ();
13081 gcc_assert (!defer_mark_used_calls);
13082 defer_mark_used_calls = true;
13084 record_key_method_defined (fndecl);
13086 fntype = TREE_TYPE (fndecl);
13088 /* TREE_READONLY (fndecl) = 1;
13089 This caused &foo to be of type ptr-to-const-function
13090 which then got a warning when stored in a ptr-to-function variable. */
13092 gcc_assert (building_stmt_tree ());
13093 /* The current function is being defined, so its DECL_INITIAL should
13094 be set, and unless there's a multiple definition, it should be
13095 error_mark_node. */
13096 gcc_assert (DECL_INITIAL (fndecl) == error_mark_node);
13098 /* For a cloned function, we've already got all the code we need;
13099 there's no need to add any extra bits. */
13100 if (!DECL_CLONED_FUNCTION_P (fndecl))
13102 if (DECL_MAIN_P (current_function_decl))
13106 /* Make it so that `main' always returns 0 by default (or
13109 stmt = finish_return_stmt (integer_one_node);
13111 stmt = finish_return_stmt (integer_zero_node);
13113 /* Hack. We don't want the middle-end to warn that this
13114 return is unreachable, so put the statement on the
13117 location_t linezero = linemap_line_start (line_table, 0, 1);
13118 SET_EXPR_LOCATION (stmt, linezero);
13122 if (use_eh_spec_block (current_function_decl))
13123 finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
13124 (TREE_TYPE (current_function_decl)),
13125 current_eh_spec_block);
13128 /* If we're saving up tree structure, tie off the function now. */
13129 DECL_SAVED_TREE (fndecl) = pop_stmt_list (DECL_SAVED_TREE (fndecl));
13131 finish_fname_decls ();
13133 /* If this function can't throw any exceptions, remember that. */
13134 if (!processing_template_decl
13135 && !cp_function_chain->can_throw
13136 && !flag_non_call_exceptions
13137 && !decl_replaceable_p (fndecl))
13138 TREE_NOTHROW (fndecl) = 1;
13140 /* This must come after expand_function_end because cleanups might
13141 have declarations (from inline functions) that need to go into
13142 this function's blocks. */
13144 /* If the current binding level isn't the outermost binding level
13145 for this function, either there is a bug, or we have experienced
13146 syntax errors and the statement tree is malformed. */
13147 if (current_binding_level->kind != sk_function_parms)
13149 /* Make sure we have already experienced errors. */
13150 gcc_assert (errorcount);
13152 /* Throw away the broken statement tree and extra binding
13154 DECL_SAVED_TREE (fndecl) = alloc_stmt_list ();
13156 while (current_binding_level->kind != sk_function_parms)
13158 if (current_binding_level->kind == sk_class)
13159 pop_nested_class ();
13161 poplevel (0, 0, 0);
13164 poplevel (1, 0, 1);
13166 /* Statements should always be full-expressions at the outermost set
13167 of curly braces for a function. */
13168 gcc_assert (stmts_are_full_exprs_p ());
13170 /* Save constexpr function body before it gets munged by
13171 the NRV transformation. */
13172 maybe_save_function_definition (fndecl);
13174 /* Set up the named return value optimization, if we can. Candidate
13175 variables are selected in check_return_expr. */
13176 if (current_function_return_value)
13178 tree r = current_function_return_value;
13181 if (r != error_mark_node
13182 /* This is only worth doing for fns that return in memory--and
13183 simpler, since we don't have to worry about promoted modes. */
13184 && aggregate_value_p (TREE_TYPE (TREE_TYPE (fndecl)), fndecl)
13185 /* Only allow this for variables declared in the outer scope of
13186 the function so we know that their lifetime always ends with a
13187 return; see g++.dg/opt/nrv6.C. We could be more flexible if
13188 we were to do this optimization in tree-ssa. */
13189 && (outer = outer_curly_brace_block (fndecl))
13190 && chain_member (r, BLOCK_VARS (outer)))
13191 finalize_nrv (&DECL_SAVED_TREE (fndecl), r, DECL_RESULT (fndecl));
13193 current_function_return_value = NULL_TREE;
13196 /* Remember that we were in class scope. */
13197 if (current_class_name)
13198 ctype = current_class_type;
13200 /* Must mark the RESULT_DECL as being in this function. */
13201 DECL_CONTEXT (DECL_RESULT (fndecl)) = fndecl;
13203 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
13204 to the FUNCTION_DECL node itself. */
13205 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl)) = fndecl;
13207 /* Save away current state, if appropriate. */
13208 if (!processing_template_decl)
13209 save_function_data (fndecl);
13211 /* Complain if there's just no return statement. */
13212 if (warn_return_type
13213 && TREE_CODE (TREE_TYPE (fntype)) != VOID_TYPE
13214 && !dependent_type_p (TREE_TYPE (fntype))
13215 && !current_function_returns_value && !current_function_returns_null
13216 /* Don't complain if we abort or throw. */
13217 && !current_function_returns_abnormally
13218 /* Don't complain if we are declared noreturn. */
13219 && !TREE_THIS_VOLATILE (fndecl)
13220 && !DECL_NAME (DECL_RESULT (fndecl))
13221 && !TREE_NO_WARNING (fndecl)
13222 /* Structor return values (if any) are set by the compiler. */
13223 && !DECL_CONSTRUCTOR_P (fndecl)
13224 && !DECL_DESTRUCTOR_P (fndecl))
13226 warning (OPT_Wreturn_type,
13227 "no return statement in function returning non-void");
13228 TREE_NO_WARNING (fndecl) = 1;
13231 /* Store the end of the function, so that we get good line number
13232 info for the epilogue. */
13233 cfun->function_end_locus = input_location;
13235 /* Complain about parameters that are only set, but never otherwise used. */
13236 if (warn_unused_but_set_parameter
13237 && !processing_template_decl
13238 && errorcount == unused_but_set_errorcount
13239 && !DECL_CLONED_FUNCTION_P (fndecl))
13243 for (decl = DECL_ARGUMENTS (fndecl);
13245 decl = DECL_CHAIN (decl))
13246 if (TREE_USED (decl)
13247 && TREE_CODE (decl) == PARM_DECL
13248 && !DECL_READ_P (decl)
13249 && DECL_NAME (decl)
13250 && !DECL_ARTIFICIAL (decl)
13251 && !TREE_NO_WARNING (decl)
13252 && !DECL_IN_SYSTEM_HEADER (decl)
13253 && TREE_TYPE (decl) != error_mark_node
13254 && TREE_CODE (TREE_TYPE (decl)) != REFERENCE_TYPE
13255 && (!CLASS_TYPE_P (TREE_TYPE (decl))
13256 || !TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl))))
13257 warning (OPT_Wunused_but_set_parameter,
13258 "parameter %q+D set but not used", decl);
13259 unused_but_set_errorcount = errorcount;
13262 /* Genericize before inlining. */
13263 if (!processing_template_decl)
13265 struct language_function *f = DECL_SAVED_FUNCTION_DATA (fndecl);
13266 invoke_plugin_callbacks (PLUGIN_PRE_GENERICIZE, fndecl);
13267 cp_genericize (fndecl);
13268 /* Clear out the bits we don't need. */
13269 f->x_current_class_ptr = NULL;
13270 f->x_current_class_ref = NULL;
13271 f->x_eh_spec_block = NULL;
13272 f->x_in_charge_parm = NULL;
13273 f->x_vtt_parm = NULL;
13274 f->x_return_value = NULL;
13275 f->bindings = NULL;
13276 f->extern_decl_map = NULL;
13278 /* Clear out the bits we don't need. */
13279 local_names = NULL;
13281 /* We're leaving the context of this function, so zap cfun. It's still in
13282 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
13284 current_function_decl = NULL;
13286 /* If this is an in-class inline definition, we may have to pop the
13287 bindings for the template parameters that we added in
13288 maybe_begin_member_template_processing when start_function was
13290 if (inclass_inline)
13291 maybe_end_member_template_processing ();
13293 /* Leave the scope of the class. */
13295 pop_nested_class ();
13300 current_function_decl = NULL_TREE;
13302 defer_mark_used_calls = false;
13303 if (deferred_mark_used_calls)
13308 FOR_EACH_VEC_ELT (tree, deferred_mark_used_calls, i, decl)
13310 VEC_free (tree, gc, deferred_mark_used_calls);
13316 /* Create the FUNCTION_DECL for a function definition.
13317 DECLSPECS and DECLARATOR are the parts of the declaration;
13318 they describe the return type and the name of the function,
13319 but twisted together in a fashion that parallels the syntax of C.
13321 This function creates a binding context for the function body
13322 as well as setting up the FUNCTION_DECL in current_function_decl.
13324 Returns a FUNCTION_DECL on success.
13326 If the DECLARATOR is not suitable for a function (it defines a datum
13327 instead), we return 0, which tells yyparse to report a parse error.
13329 May return void_type_node indicating that this method is actually
13330 a friend. See grokfield for more details.
13332 Came here with a `.pushlevel' .
13334 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
13335 CHANGES TO CODE IN `grokfield'. */
13338 grokmethod (cp_decl_specifier_seq *declspecs,
13339 const cp_declarator *declarator, tree attrlist)
13341 tree fndecl = grokdeclarator (declarator, declspecs, MEMFUNCDEF, 0,
13344 if (fndecl == error_mark_node)
13345 return error_mark_node;
13347 if (fndecl == NULL || TREE_CODE (fndecl) != FUNCTION_DECL)
13349 error ("invalid member function declaration");
13350 return error_mark_node;
13354 cplus_decl_attributes (&fndecl, attrlist, 0);
13356 /* Pass friends other than inline friend functions back. */
13357 if (fndecl == void_type_node)
13360 if (DECL_IN_AGGR_P (fndecl))
13362 if (DECL_CLASS_SCOPE_P (fndecl))
13363 error ("%qD is already defined in class %qT", fndecl,
13364 DECL_CONTEXT (fndecl));
13365 return error_mark_node;
13368 check_template_shadow (fndecl);
13370 DECL_DECLARED_INLINE_P (fndecl) = 1;
13371 DECL_NO_INLINE_WARNING_P (fndecl) = 1;
13373 /* We process method specializations in finish_struct_1. */
13374 if (processing_template_decl && !DECL_TEMPLATE_SPECIALIZATION (fndecl))
13376 fndecl = push_template_decl (fndecl);
13377 if (fndecl == error_mark_node)
13381 if (! DECL_FRIEND_P (fndecl))
13383 if (DECL_CHAIN (fndecl))
13385 fndecl = copy_node (fndecl);
13386 TREE_CHAIN (fndecl) = NULL_TREE;
13390 cp_finish_decl (fndecl, NULL_TREE, false, NULL_TREE, 0);
13392 DECL_IN_AGGR_P (fndecl) = 1;
13397 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
13398 we can lay it out later, when and if its type becomes complete. */
13401 maybe_register_incomplete_var (tree var)
13403 gcc_assert (TREE_CODE (var) == VAR_DECL);
13405 /* Keep track of variables with incomplete types. */
13406 if (!processing_template_decl && TREE_TYPE (var) != error_mark_node
13407 && DECL_EXTERNAL (var))
13409 tree inner_type = TREE_TYPE (var);
13411 while (TREE_CODE (inner_type) == ARRAY_TYPE)
13412 inner_type = TREE_TYPE (inner_type);
13413 inner_type = TYPE_MAIN_VARIANT (inner_type);
13415 if ((!COMPLETE_TYPE_P (inner_type) && CLASS_TYPE_P (inner_type))
13416 /* RTTI TD entries are created while defining the type_info. */
13417 || (TYPE_LANG_SPECIFIC (inner_type)
13418 && TYPE_BEING_DEFINED (inner_type)))
13421 = VEC_safe_push (incomplete_var, gc, incomplete_vars, NULL);
13423 iv->incomplete_type = inner_type;
13428 /* Called when a class type (given by TYPE) is defined. If there are
13429 any existing VAR_DECLs whose type has been completed by this
13430 declaration, update them now. */
13433 complete_vars (tree type)
13436 incomplete_var *iv;
13438 for (ix = 0; VEC_iterate (incomplete_var, incomplete_vars, ix, iv); )
13440 if (same_type_p (type, iv->incomplete_type))
13442 tree var = iv->decl;
13443 tree type = TREE_TYPE (var);
13444 /* Complete the type of the variable. The VAR_DECL itself
13445 will be laid out in expand_expr. */
13446 complete_type (type);
13447 cp_apply_type_quals_to_decl (cp_type_quals (type), var);
13448 /* Remove this entry from the list. */
13449 VEC_unordered_remove (incomplete_var, incomplete_vars, ix);
13455 /* Check for pending declarations which may have abstract type. */
13456 complete_type_check_abstract (type);
13459 /* If DECL is of a type which needs a cleanup, build and return an
13460 expression to perform that cleanup here. Return NULL_TREE if no
13461 cleanup need be done. */
13464 cxx_maybe_build_cleanup (tree decl, tsubst_flags_t complain)
13470 /* Assume no cleanup is required. */
13471 cleanup = NULL_TREE;
13473 if (error_operand_p (decl))
13476 /* Handle "__attribute__((cleanup))". We run the cleanup function
13477 before the destructor since the destructor is what actually
13478 terminates the lifetime of the object. */
13479 attr = lookup_attribute ("cleanup", DECL_ATTRIBUTES (decl));
13486 /* Get the name specified by the user for the cleanup function. */
13487 id = TREE_VALUE (TREE_VALUE (attr));
13488 /* Look up the name to find the cleanup function to call. It is
13489 important to use lookup_name here because that is what is
13490 used in c-common.c:handle_cleanup_attribute when performing
13491 initial checks on the attribute. Note that those checks
13492 include ensuring that the function found is not an overloaded
13493 function, or an object with an overloaded call operator,
13494 etc.; we can rely on the fact that the function found is an
13495 ordinary FUNCTION_DECL. */
13496 fn = lookup_name (id);
13497 arg = build_address (decl);
13499 cleanup = cp_build_function_call_nary (fn, complain, arg, NULL_TREE);
13500 if (cleanup == error_mark_node)
13501 return error_mark_node;
13503 /* Handle ordinary C++ destructors. */
13504 type = TREE_TYPE (decl);
13505 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
13507 int flags = LOOKUP_NORMAL|LOOKUP_DESTRUCTOR;
13508 bool has_vbases = (TREE_CODE (type) == RECORD_TYPE
13509 && CLASSTYPE_VBASECLASSES (type));
13513 if (TREE_CODE (type) == ARRAY_TYPE)
13516 addr = build_address (decl);
13518 /* Optimize for space over speed here. */
13519 if (!has_vbases || flag_expensive_optimizations)
13520 flags |= LOOKUP_NONVIRTUAL;
13522 call = build_delete (TREE_TYPE (addr), addr,
13523 sfk_complete_destructor, flags, 0, complain);
13524 if (call == error_mark_node)
13525 cleanup = error_mark_node;
13527 cleanup = cp_build_compound_expr (cleanup, call, complain);
13535 /* When a stmt has been parsed, this function is called. */
13542 /* Return the FUNCTION_TYPE that corresponds to MEMFNTYPE, which can be a
13543 FUNCTION_DECL, METHOD_TYPE, FUNCTION_TYPE, pointer or reference to
13544 METHOD_TYPE or FUNCTION_TYPE, or pointer to member function. */
13547 static_fn_type (tree memfntype)
13552 if (TYPE_PTRMEMFUNC_P (memfntype))
13553 memfntype = TYPE_PTRMEMFUNC_FN_TYPE (memfntype);
13554 if (POINTER_TYPE_P (memfntype)
13555 || TREE_CODE (memfntype) == FUNCTION_DECL)
13556 memfntype = TREE_TYPE (memfntype);
13557 if (TREE_CODE (memfntype) == FUNCTION_TYPE)
13559 gcc_assert (TREE_CODE (memfntype) == METHOD_TYPE);
13560 args = TYPE_ARG_TYPES (memfntype);
13561 fntype = build_function_type (TREE_TYPE (memfntype), TREE_CHAIN (args));
13562 fntype = apply_memfn_quals (fntype, type_memfn_quals (memfntype));
13563 fntype = (cp_build_type_attribute_variant
13564 (fntype, TYPE_ATTRIBUTES (memfntype)));
13565 fntype = (build_exception_variant
13566 (fntype, TYPE_RAISES_EXCEPTIONS (memfntype)));
13570 /* DECL was originally constructed as a non-static member function,
13571 but turned out to be static. Update it accordingly. */
13574 revert_static_member_fn (tree decl)
13576 tree stype = static_fn_type (decl);
13578 if (type_memfn_quals (stype) != TYPE_UNQUALIFIED)
13580 error ("static member function %q#D declared with type qualifiers", decl);
13581 stype = apply_memfn_quals (stype, TYPE_UNQUALIFIED);
13583 TREE_TYPE (decl) = stype;
13585 if (DECL_ARGUMENTS (decl))
13586 DECL_ARGUMENTS (decl) = DECL_CHAIN (DECL_ARGUMENTS (decl));
13587 DECL_STATIC_FUNCTION_P (decl) = 1;
13590 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
13591 one of the language-independent trees. */
13593 enum cp_tree_node_structure_enum
13594 cp_tree_node_structure (union lang_tree_node * t)
13596 switch (TREE_CODE (&t->generic))
13598 case DEFAULT_ARG: return TS_CP_DEFAULT_ARG;
13599 case IDENTIFIER_NODE: return TS_CP_IDENTIFIER;
13600 case OVERLOAD: return TS_CP_OVERLOAD;
13601 case TEMPLATE_PARM_INDEX: return TS_CP_TPI;
13602 case PTRMEM_CST: return TS_CP_PTRMEM;
13603 case BASELINK: return TS_CP_BASELINK;
13604 case STATIC_ASSERT: return TS_CP_STATIC_ASSERT;
13605 case ARGUMENT_PACK_SELECT: return TS_CP_ARGUMENT_PACK_SELECT;
13606 case TRAIT_EXPR: return TS_CP_TRAIT_EXPR;
13607 case LAMBDA_EXPR: return TS_CP_LAMBDA_EXPR;
13608 case TEMPLATE_INFO: return TS_CP_TEMPLATE_INFO;
13609 default: return TS_CP_GENERIC;
13613 /* Build the void_list_node (void_type_node having been created). */
13615 build_void_list_node (void)
13617 tree t = build_tree_list (NULL_TREE, void_type_node);
13622 cp_missing_noreturn_ok_p (tree decl)
13624 /* A missing noreturn is ok for the `main' function. */
13625 return DECL_MAIN_P (decl);
13628 /* Return the COMDAT group into which DECL should be placed. */
13631 cxx_comdat_group (tree decl)
13635 /* Virtual tables, construction virtual tables, and virtual table
13636 tables all go in a single COMDAT group, named after the primary
13638 if (TREE_CODE (decl) == VAR_DECL && DECL_VTABLE_OR_VTT_P (decl))
13639 name = DECL_ASSEMBLER_NAME (CLASSTYPE_VTABLES (DECL_CONTEXT (decl)));
13640 /* For all other DECLs, the COMDAT group is the mangled name of the
13641 declaration itself. */
13644 while (DECL_THUNK_P (decl))
13646 /* If TARGET_USE_LOCAL_THUNK_ALIAS_P, use_thunk puts the thunk
13647 into the same section as the target function. In that case
13648 we must return target's name. */
13649 tree target = THUNK_TARGET (decl);
13650 if (TARGET_USE_LOCAL_THUNK_ALIAS_P (target)
13651 && DECL_SECTION_NAME (target) != NULL
13652 && DECL_ONE_ONLY (target))
13657 name = DECL_ASSEMBLER_NAME (decl);
13663 #include "gt-cp-decl.h"